| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Douglas Gilbert | 35830 | 76.54% | 82 | 28.28% |
| Wenchao Hao | 2712 | 5.79% | 10 | 3.45% |
| Martin K. Petersen | 1520 | 3.25% | 14 | 4.83% |
| John Garry | 1447 | 3.09% | 21 | 7.24% |
| Damien Le Moal | 1156 | 2.47% | 11 | 3.79% |
| FUJITA Tomonori | 704 | 1.50% | 16 | 5.52% |
| Hannes Reinecke | 581 | 1.24% | 3 | 1.03% |
| James Bottomley | 372 | 0.79% | 2 | 0.69% |
| Ewan D. Milne | 336 | 0.72% | 5 | 1.72% |
| Kashyap Desai | 310 | 0.66% | 1 | 0.34% |
| Akinobu Mita | 261 | 0.56% | 17 | 5.86% |
| Bart Van Assche | 248 | 0.53% | 9 | 3.10% |
| Linus Torvalds (pre-git) | 210 | 0.45% | 16 | 5.52% |
| Mike Anderson | 170 | 0.36% | 4 | 1.38% |
| Martin Wilck | 132 | 0.28% | 2 | 0.69% |
| Linus Torvalds | 129 | 0.28% | 2 | 0.69% |
| Matthew Wilcox | 79 | 0.17% | 1 | 0.34% |
| Christoph Hellwig | 73 | 0.16% | 16 | 5.52% |
| George Kennedy | 61 | 0.13% | 3 | 1.03% |
| Shin'ichiro Kawasaki | 50 | 0.11% | 2 | 0.69% |
| Tomas Winkler | 46 | 0.10% | 4 | 1.38% |
| Laurence Oberman | 45 | 0.10% | 1 | 0.34% |
| Martin Pitt | 45 | 0.10% | 1 | 0.34% |
| Lukas Herbolt | 42 | 0.09% | 1 | 0.34% |
| John Pittman | 42 | 0.09% | 2 | 0.69% |
| Eric Sandeen | 39 | 0.08% | 1 | 0.34% |
| Randy Dunlap | 20 | 0.04% | 1 | 0.34% |
| Yuan Can | 18 | 0.04% | 1 | 0.34% |
| Maurizio Lombardi | 17 | 0.04% | 1 | 0.34% |
| Al Viro | 14 | 0.03% | 3 | 1.03% |
| Ye Bin | 14 | 0.03% | 2 | 0.69% |
| Harshit Mogalapalli | 13 | 0.03% | 4 | 1.38% |
| Yang Yingliang | 11 | 0.02% | 1 | 0.34% |
| Tejun Heo | 10 | 0.02% | 1 | 0.34% |
| Nicholas Bellinger | 5 | 0.01% | 1 | 0.34% |
| Arnd Bergmann | 5 | 0.01% | 2 | 0.69% |
| Andy Shevchenko | 4 | 0.01% | 1 | 0.34% |
| Greg Kroah-Hartman | 4 | 0.01% | 2 | 0.69% |
| Dan Carpenter | 4 | 0.01% | 2 | 0.69% |
| Doug Ledford | 4 | 0.01% | 1 | 0.34% |
| Jason A. Donenfeld | 3 | 0.01% | 1 | 0.34% |
| Russell King | 3 | 0.01% | 1 | 0.34% |
| Jens Axboe | 3 | 0.01% | 1 | 0.34% |
| Boaz Harrosh | 3 | 0.01% | 1 | 0.34% |
| Andrew Morton | 2 | 0.00% | 1 | 0.34% |
| Kay Sievers | 2 | 0.00% | 1 | 0.34% |
| Kees Cook | 2 | 0.00% | 1 | 0.34% |
| Thomas Gleixner | 1 | 0.00% | 1 | 0.34% |
| Uwe Kleine-König | 1 | 0.00% | 1 | 0.34% |
| Ming Lin | 1 | 0.00% | 1 | 0.34% |
| Art Haas | 1 | 0.00% | 1 | 0.34% |
| Luis Henriques | 1 | 0.00% | 1 | 0.34% |
| Sasha Levin | 1 | 0.00% | 1 | 0.34% |
| Colin Ian King | 1 | 0.00% | 1 | 0.34% |
| Arjan van de Ven | 1 | 0.00% | 1 | 0.34% |
| Lucas De Marchi | 1 | 0.00% | 1 | 0.34% |
| Adrian Bunk | 1 | 0.00% | 1 | 0.34% |
| Alexey Dobriyan | 1 | 0.00% | 1 | 0.34% |
| Finn Thain | 1 | 0.00% | 1 | 0.34% |
| Nathan Chancellor | 1 | 0.00% | 1 | 0.34% |
| Total | 46814 | 290 |
// SPDX-License-Identifier: GPL-2.0-or-later /* * vvvvvvvvvvvvvvvvvvvvvvv Original vvvvvvvvvvvvvvvvvvvvvvvvvvvvvvv * Copyright (C) 1992 Eric Youngdale * Simulate a host adapter with 2 disks attached. Do a lot of checking * to make sure that we are not getting blocks mixed up, and PANIC if * anything out of the ordinary is seen. * ^^^^^^^^^^^^^^^^^^^^^^^ Original ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ * * Copyright (C) 2001 - 2021 Douglas Gilbert * * For documentation see http://sg.danny.cz/sg/scsi_debug.html */ #define pr_fmt(fmt) KBUILD_MODNAME ":%s: " fmt, __func__ #include <linux/module.h> #include <linux/align.h> #include <linux/kernel.h> #include <linux/errno.h> #include <linux/jiffies.h> #include <linux/slab.h> #include <linux/types.h> #include <linux/string.h> #include <linux/fs.h> #include <linux/init.h> #include <linux/proc_fs.h> #include <linux/vmalloc.h> #include <linux/moduleparam.h> #include <linux/scatterlist.h> #include <linux/blkdev.h> #include <linux/crc-t10dif.h> #include <linux/spinlock.h> #include <linux/interrupt.h> #include <linux/atomic.h> #include <linux/hrtimer.h> #include <linux/uuid.h> #include <linux/t10-pi.h> #include <linux/msdos_partition.h> #include <linux/random.h> #include <linux/xarray.h> #include <linux/prefetch.h> #include <linux/debugfs.h> #include <linux/async.h> #include <net/checksum.h> #include <asm/unaligned.h> #include <scsi/scsi.h> #include <scsi/scsi_cmnd.h> #include <scsi/scsi_device.h> #include <scsi/scsi_host.h> #include <scsi/scsicam.h> #include <scsi/scsi_eh.h> #include <scsi/scsi_tcq.h> #include <scsi/scsi_dbg.h> #include "sd.h" #include "scsi_logging.h" /* make sure inq_product_rev string corresponds to this version */ #define SDEBUG_VERSION "0191" /* format to fit INQUIRY revision field */ static const char *sdebug_version_date = "20210520"; #define MY_NAME "scsi_debug" /* Additional Sense Code (ASC) */ #define NO_ADDITIONAL_SENSE 0x0 #define LOGICAL_UNIT_NOT_READY 0x4 #define LOGICAL_UNIT_COMMUNICATION_FAILURE 0x8 #define UNRECOVERED_READ_ERR 0x11 #define PARAMETER_LIST_LENGTH_ERR 0x1a #define INVALID_OPCODE 0x20 #define LBA_OUT_OF_RANGE 0x21 #define INVALID_FIELD_IN_CDB 0x24 #define INVALID_FIELD_IN_PARAM_LIST 0x26 #define WRITE_PROTECTED 0x27 #define UA_RESET_ASC 0x29 #define UA_CHANGED_ASC 0x2a #define TARGET_CHANGED_ASC 0x3f #define LUNS_CHANGED_ASCQ 0x0e #define INSUFF_RES_ASC 0x55 #define INSUFF_RES_ASCQ 0x3 #define POWER_ON_RESET_ASCQ 0x0 #define POWER_ON_OCCURRED_ASCQ 0x1 #define BUS_RESET_ASCQ 0x2 /* scsi bus reset occurred */ #define MODE_CHANGED_ASCQ 0x1 /* mode parameters changed */ #define CAPACITY_CHANGED_ASCQ 0x9 #define SAVING_PARAMS_UNSUP 0x39 #define TRANSPORT_PROBLEM 0x4b #define THRESHOLD_EXCEEDED 0x5d #define LOW_POWER_COND_ON 0x5e #define MISCOMPARE_VERIFY_ASC 0x1d #define MICROCODE_CHANGED_ASCQ 0x1 /* with TARGET_CHANGED_ASC */ #define MICROCODE_CHANGED_WO_RESET_ASCQ 0x16 #define WRITE_ERROR_ASC 0xc #define UNALIGNED_WRITE_ASCQ 0x4 #define WRITE_BOUNDARY_ASCQ 0x5 #define READ_INVDATA_ASCQ 0x6 #define READ_BOUNDARY_ASCQ 0x7 #define ATTEMPT_ACCESS_GAP 0x9 #define INSUFF_ZONE_ASCQ 0xe /* Additional Sense Code Qualifier (ASCQ) */ #define ACK_NAK_TO 0x3 /* Default values for driver parameters */ #define DEF_NUM_HOST 1 #define DEF_NUM_TGTS 1 #define DEF_MAX_LUNS 1 /* With these defaults, this driver will make 1 host with 1 target * (id 0) containing 1 logical unit (lun 0). That is 1 device. */ #define DEF_ATO 1 #define DEF_CDB_LEN 10 #define DEF_JDELAY 1 /* if > 0 unit is a jiffy */ #define DEF_DEV_SIZE_PRE_INIT 0 #define DEF_DEV_SIZE_MB 8 #define DEF_ZBC_DEV_SIZE_MB 128 #define DEF_DIF 0 #define DEF_DIX 0 #define DEF_PER_HOST_STORE false #define DEF_D_SENSE 0 #define DEF_EVERY_NTH 0 #define DEF_FAKE_RW 0 #define DEF_GUARD 0 #define DEF_HOST_LOCK 0 #define DEF_LBPU 0 #define DEF_LBPWS 0 #define DEF_LBPWS10 0 #define DEF_LBPRZ 1 #define DEF_LOWEST_ALIGNED 0 #define DEF_NDELAY 0 /* if > 0 unit is a nanosecond */ #define DEF_NO_LUN_0 0 #define DEF_NUM_PARTS 0 #define DEF_OPTS 0 #define DEF_OPT_BLKS 1024 #define DEF_PHYSBLK_EXP 0 #define DEF_OPT_XFERLEN_EXP 0 #define DEF_PTYPE TYPE_DISK #define DEF_RANDOM false #define DEF_REMOVABLE false #define DEF_SCSI_LEVEL 7 /* INQUIRY, byte2 [6->SPC-4; 7->SPC-5] */ #define DEF_SECTOR_SIZE 512 #define DEF_UNMAP_ALIGNMENT 0 #define DEF_UNMAP_GRANULARITY 1 #define DEF_UNMAP_MAX_BLOCKS 0xFFFFFFFF #define DEF_UNMAP_MAX_DESC 256 #define DEF_VIRTUAL_GB 0 #define DEF_VPD_USE_HOSTNO 1 #define DEF_WRITESAME_LENGTH 0xFFFF #define DEF_STRICT 0 #define DEF_STATISTICS false #define DEF_SUBMIT_QUEUES 1 #define DEF_TUR_MS_TO_READY 0 #define DEF_UUID_CTL 0 #define JDELAY_OVERRIDDEN -9999 /* Default parameters for ZBC drives */ #define DEF_ZBC_ZONE_SIZE_MB 128 #define DEF_ZBC_MAX_OPEN_ZONES 8 #define DEF_ZBC_NR_CONV_ZONES 1 #define SDEBUG_LUN_0_VAL 0 /* bit mask values for sdebug_opts */ #define SDEBUG_OPT_NOISE 1 #define SDEBUG_OPT_MEDIUM_ERR 2 #define SDEBUG_OPT_TIMEOUT 4 #define SDEBUG_OPT_RECOVERED_ERR 8 #define SDEBUG_OPT_TRANSPORT_ERR 16 #define SDEBUG_OPT_DIF_ERR 32 #define SDEBUG_OPT_DIX_ERR 64 #define SDEBUG_OPT_MAC_TIMEOUT 128 #define SDEBUG_OPT_SHORT_TRANSFER 0x100 #define SDEBUG_OPT_Q_NOISE 0x200 #define SDEBUG_OPT_ALL_TSF 0x400 /* ignore */ #define SDEBUG_OPT_RARE_TSF 0x800 #define SDEBUG_OPT_N_WCE 0x1000 #define SDEBUG_OPT_RESET_NOISE 0x2000 #define SDEBUG_OPT_NO_CDB_NOISE 0x4000 #define SDEBUG_OPT_HOST_BUSY 0x8000 #define SDEBUG_OPT_CMD_ABORT 0x10000 #define SDEBUG_OPT_ALL_NOISE (SDEBUG_OPT_NOISE | SDEBUG_OPT_Q_NOISE | \ SDEBUG_OPT_RESET_NOISE) #define SDEBUG_OPT_ALL_INJECTING (SDEBUG_OPT_RECOVERED_ERR | \ SDEBUG_OPT_TRANSPORT_ERR | \ SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR | \ SDEBUG_OPT_SHORT_TRANSFER | \ SDEBUG_OPT_HOST_BUSY | \ SDEBUG_OPT_CMD_ABORT) #define SDEBUG_OPT_RECOV_DIF_DIX (SDEBUG_OPT_RECOVERED_ERR | \ SDEBUG_OPT_DIF_ERR | SDEBUG_OPT_DIX_ERR) /* As indicated in SAM-5 and SPC-4 Unit Attentions (UAs) are returned in * priority order. In the subset implemented here lower numbers have higher * priority. The UA numbers should be a sequence starting from 0 with * SDEBUG_NUM_UAS being 1 higher than the highest numbered UA. */ #define SDEBUG_UA_POR 0 /* Power on, reset, or bus device reset */ #define SDEBUG_UA_POOCCUR 1 /* Power on occurred */ #define SDEBUG_UA_BUS_RESET 2 #define SDEBUG_UA_MODE_CHANGED 3 #define SDEBUG_UA_CAPACITY_CHANGED 4 #define SDEBUG_UA_LUNS_CHANGED 5 #define SDEBUG_UA_MICROCODE_CHANGED 6 /* simulate firmware change */ #define SDEBUG_UA_MICROCODE_CHANGED_WO_RESET 7 #define SDEBUG_NUM_UAS 8 /* when 1==SDEBUG_OPT_MEDIUM_ERR, a medium error is simulated at this * sector on read commands: */ #define OPT_MEDIUM_ERR_ADDR 0x1234 /* that's sector 4660 in decimal */ #define OPT_MEDIUM_ERR_NUM 10 /* number of consecutive medium errs */ /* SDEBUG_CANQUEUE is the maximum number of commands that can be queued * (for response) per submit queue at one time. Can be reduced by max_queue * option. Command responses are not queued when jdelay=0 and ndelay=0. The * per-device DEF_CMD_PER_LUN can be changed via sysfs: * /sys/class/scsi_device/<h:c:t:l>/device/queue_depth * but cannot exceed SDEBUG_CANQUEUE . */ #define SDEBUG_CANQUEUE_WORDS 3 /* a WORD is bits in a long */ #define SDEBUG_CANQUEUE (SDEBUG_CANQUEUE_WORDS * BITS_PER_LONG) #define DEF_CMD_PER_LUN SDEBUG_CANQUEUE /* UA - Unit Attention; SA - Service Action; SSU - Start Stop Unit */ #define F_D_IN 1 /* Data-in command (e.g. READ) */ #define F_D_OUT 2 /* Data-out command (e.g. WRITE) */ #define F_D_OUT_MAYBE 4 /* WRITE SAME, NDOB bit */ #define F_D_UNKN 8 #define F_RL_WLUN_OK 0x10 /* allowed with REPORT LUNS W-LUN */ #define F_SKIP_UA 0x20 /* bypass UAs (e.g. INQUIRY command) */ #define F_DELAY_OVERR 0x40 /* for commands like INQUIRY */ #define F_SA_LOW 0x80 /* SA is in cdb byte 1, bits 4 to 0 */ #define F_SA_HIGH 0x100 /* SA is in cdb bytes 8 and 9 */ #define F_INV_OP 0x200 /* invalid opcode (not supported) */ #define F_FAKE_RW 0x400 /* bypass resp_*() when fake_rw set */ #define F_M_ACCESS 0x800 /* media access, reacts to SSU state */ #define F_SSU_DELAY 0x1000 /* SSU command delay (long-ish) */ #define F_SYNC_DELAY 0x2000 /* SYNCHRONIZE CACHE delay */ /* Useful combinations of the above flags */ #define FF_RESPOND (F_RL_WLUN_OK | F_SKIP_UA | F_DELAY_OVERR) #define FF_MEDIA_IO (F_M_ACCESS | F_FAKE_RW) #define FF_SA (F_SA_HIGH | F_SA_LOW) #define F_LONG_DELAY (F_SSU_DELAY | F_SYNC_DELAY) #define SDEBUG_MAX_PARTS 4 #define SDEBUG_MAX_CMD_LEN 32 #define SDEB_XA_NOT_IN_USE XA_MARK_1 static struct kmem_cache *queued_cmd_cache; #define TO_QUEUED_CMD(scmd) ((void *)(scmd)->host_scribble) #define ASSIGN_QUEUED_CMD(scmnd, qc) { (scmnd)->host_scribble = (void *) qc; } /* Zone types (zbcr05 table 25) */ enum sdebug_z_type { ZBC_ZTYPE_CNV = 0x1, ZBC_ZTYPE_SWR = 0x2, ZBC_ZTYPE_SWP = 0x3, /* ZBC_ZTYPE_SOBR = 0x4, */ ZBC_ZTYPE_GAP = 0x5, }; /* enumeration names taken from table 26, zbcr05 */ enum sdebug_z_cond { ZBC_NOT_WRITE_POINTER = 0x0, ZC1_EMPTY = 0x1, ZC2_IMPLICIT_OPEN = 0x2, ZC3_EXPLICIT_OPEN = 0x3, ZC4_CLOSED = 0x4, ZC6_READ_ONLY = 0xd, ZC5_FULL = 0xe, ZC7_OFFLINE = 0xf, }; struct sdeb_zone_state { /* ZBC: per zone state */ enum sdebug_z_type z_type; enum sdebug_z_cond z_cond; bool z_non_seq_resource; unsigned int z_size; sector_t z_start; sector_t z_wp; }; enum sdebug_err_type { ERR_TMOUT_CMD = 0, /* make specific scsi command timeout */ ERR_FAIL_QUEUE_CMD = 1, /* make specific scsi command's */ /* queuecmd return failed */ ERR_FAIL_CMD = 2, /* make specific scsi command's */ /* queuecmd return succeed but */ /* with errors set in scsi_cmnd */ ERR_ABORT_CMD_FAILED = 3, /* control return FAILED from */ /* scsi_debug_abort() */ ERR_LUN_RESET_FAILED = 4, /* control return FAILED from */ /* scsi_debug_device_reseLUN_RESET_FAILEDt() */ }; struct sdebug_err_inject { int type; struct list_head list; int cnt; unsigned char cmd; struct rcu_head rcu; union { /* * For ERR_FAIL_QUEUE_CMD */ int queuecmd_ret; /* * For ERR_FAIL_CMD */ struct { unsigned char host_byte; unsigned char driver_byte; unsigned char status_byte; unsigned char sense_key; unsigned char asc; unsigned char asq; }; }; }; struct sdebug_dev_info { struct list_head dev_list; unsigned int channel; unsigned int target; u64 lun; uuid_t lu_name; struct sdebug_host_info *sdbg_host; unsigned long uas_bm[1]; atomic_t stopped; /* 1: by SSU, 2: device start */ bool used; /* For ZBC devices */ enum blk_zoned_model zmodel; unsigned int zcap; unsigned int zsize; unsigned int zsize_shift; unsigned int nr_zones; unsigned int nr_conv_zones; unsigned int nr_seq_zones; unsigned int nr_imp_open; unsigned int nr_exp_open; unsigned int nr_closed; unsigned int max_open; ktime_t create_ts; /* time since bootup that this device was created */ struct sdeb_zone_state *zstate; struct dentry *debugfs_entry; struct spinlock list_lock; struct list_head inject_err_list; }; struct sdebug_target_info { bool reset_fail; struct dentry *debugfs_entry; }; struct sdebug_host_info { struct list_head host_list; int si_idx; /* sdeb_store_info (per host) xarray index */ struct Scsi_Host *shost; struct device dev; struct list_head dev_info_list; }; /* There is an xarray of pointers to this struct's objects, one per host */ struct sdeb_store_info { rwlock_t macc_lck; /* for atomic media access on this store */ u8 *storep; /* user data storage (ram) */ struct t10_pi_tuple *dif_storep; /* protection info */ void *map_storep; /* provisioning map */ }; #define dev_to_sdebug_host(d) \ container_of(d, struct sdebug_host_info, dev) #define shost_to_sdebug_host(shost) \ dev_to_sdebug_host(shost->dma_dev) enum sdeb_defer_type {SDEB_DEFER_NONE = 0, SDEB_DEFER_HRT = 1, SDEB_DEFER_WQ = 2, SDEB_DEFER_POLL = 3}; struct sdebug_defer { struct hrtimer hrt; struct execute_work ew; ktime_t cmpl_ts;/* time since boot to complete this cmd */ int issuing_cpu; bool aborted; /* true when blk_abort_request() already called */ enum sdeb_defer_type defer_t; }; struct sdebug_queued_cmd { /* corresponding bit set in in_use_bm[] in owning struct sdebug_queue * instance indicates this slot is in use. */ struct sdebug_defer sd_dp; struct scsi_cmnd *scmd; }; struct sdebug_scsi_cmd { spinlock_t lock; }; static atomic_t sdebug_cmnd_count; /* number of incoming commands */ static atomic_t sdebug_completions; /* count of deferred completions */ static atomic_t sdebug_miss_cpus; /* submission + completion cpus differ */ static atomic_t sdebug_a_tsf; /* 'almost task set full' counter */ static atomic_t sdeb_inject_pending; static atomic_t sdeb_mq_poll_count; /* bumped when mq_poll returns > 0 */ struct opcode_info_t { u8 num_attached; /* 0 if this is it (i.e. a leaf); use 0xff */ /* for terminating element */ u8 opcode; /* if num_attached > 0, preferred */ u16 sa; /* service action */ u32 flags; /* OR-ed set of SDEB_F_* */ int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); const struct opcode_info_t *arrp; /* num_attached elements or NULL */ u8 len_mask[16]; /* len_mask[0]-->cdb_len, then mask for cdb */ /* 1 to min(cdb_len, 15); ignore cdb[15...] */ }; /* SCSI opcodes (first byte of cdb) of interest mapped onto these indexes */ enum sdeb_opcode_index { SDEB_I_INVALID_OPCODE = 0, SDEB_I_INQUIRY = 1, SDEB_I_REPORT_LUNS = 2, SDEB_I_REQUEST_SENSE = 3, SDEB_I_TEST_UNIT_READY = 4, SDEB_I_MODE_SENSE = 5, /* 6, 10 */ SDEB_I_MODE_SELECT = 6, /* 6, 10 */ SDEB_I_LOG_SENSE = 7, SDEB_I_READ_CAPACITY = 8, /* 10; 16 is in SA_IN(16) */ SDEB_I_READ = 9, /* 6, 10, 12, 16 */ SDEB_I_WRITE = 10, /* 6, 10, 12, 16 */ SDEB_I_START_STOP = 11, SDEB_I_SERV_ACT_IN_16 = 12, /* add ...SERV_ACT_IN_12 if needed */ SDEB_I_SERV_ACT_OUT_16 = 13, /* add ...SERV_ACT_OUT_12 if needed */ SDEB_I_MAINT_IN = 14, SDEB_I_MAINT_OUT = 15, SDEB_I_VERIFY = 16, /* VERIFY(10), VERIFY(16) */ SDEB_I_VARIABLE_LEN = 17, /* READ(32), WRITE(32), WR_SCAT(32) */ SDEB_I_RESERVE = 18, /* 6, 10 */ SDEB_I_RELEASE = 19, /* 6, 10 */ SDEB_I_ALLOW_REMOVAL = 20, /* PREVENT ALLOW MEDIUM REMOVAL */ SDEB_I_REZERO_UNIT = 21, /* REWIND in SSC */ SDEB_I_ATA_PT = 22, /* 12, 16 */ SDEB_I_SEND_DIAG = 23, SDEB_I_UNMAP = 24, SDEB_I_WRITE_BUFFER = 25, SDEB_I_WRITE_SAME = 26, /* 10, 16 */ SDEB_I_SYNC_CACHE = 27, /* 10, 16 */ SDEB_I_COMP_WRITE = 28, SDEB_I_PRE_FETCH = 29, /* 10, 16 */ SDEB_I_ZONE_OUT = 30, /* 0x94+SA; includes no data xfer */ SDEB_I_ZONE_IN = 31, /* 0x95+SA; all have data-in */ SDEB_I_LAST_ELEM_P1 = 32, /* keep this last (previous + 1) */ }; static const unsigned char opcode_ind_arr[256] = { /* 0x0; 0x0->0x1f: 6 byte cdbs */ SDEB_I_TEST_UNIT_READY, SDEB_I_REZERO_UNIT, 0, SDEB_I_REQUEST_SENSE, 0, 0, 0, 0, SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, 0, 0, 0, SDEB_I_INQUIRY, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, SDEB_I_RELEASE, 0, 0, SDEB_I_MODE_SENSE, SDEB_I_START_STOP, 0, SDEB_I_SEND_DIAG, SDEB_I_ALLOW_REMOVAL, 0, /* 0x20; 0x20->0x3f: 10 byte cdbs */ 0, 0, 0, 0, 0, SDEB_I_READ_CAPACITY, 0, 0, SDEB_I_READ, 0, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, 0, 0, 0, 0, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, 0, 0, 0, 0, SDEB_I_WRITE_BUFFER, 0, 0, 0, 0, /* 0x40; 0x40->0x5f: 10 byte cdbs */ 0, SDEB_I_WRITE_SAME, SDEB_I_UNMAP, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, SDEB_I_LOG_SENSE, 0, 0, 0, 0, 0, 0, 0, SDEB_I_MODE_SELECT, SDEB_I_RESERVE, SDEB_I_RELEASE, 0, 0, SDEB_I_MODE_SENSE, 0, 0, 0, 0, 0, /* 0x60; 0x60->0x7d are reserved, 0x7e is "extended cdb" */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, SDEB_I_VARIABLE_LEN, /* 0x80; 0x80->0x9f: 16 byte cdbs */ 0, 0, 0, 0, 0, SDEB_I_ATA_PT, 0, 0, SDEB_I_READ, SDEB_I_COMP_WRITE, SDEB_I_WRITE, 0, 0, 0, 0, SDEB_I_VERIFY, SDEB_I_PRE_FETCH, SDEB_I_SYNC_CACHE, 0, SDEB_I_WRITE_SAME, SDEB_I_ZONE_OUT, SDEB_I_ZONE_IN, 0, 0, 0, 0, 0, 0, 0, 0, SDEB_I_SERV_ACT_IN_16, SDEB_I_SERV_ACT_OUT_16, /* 0xa0; 0xa0->0xbf: 12 byte cdbs */ SDEB_I_REPORT_LUNS, SDEB_I_ATA_PT, 0, SDEB_I_MAINT_IN, SDEB_I_MAINT_OUT, 0, 0, 0, SDEB_I_READ, 0 /* SDEB_I_SERV_ACT_OUT_12 */, SDEB_I_WRITE, 0 /* SDEB_I_SERV_ACT_IN_12 */, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0; 0xc0->0xff: vendor specific */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; /* * The following "response" functions return the SCSI mid-level's 4 byte * tuple-in-an-int. To handle commands with an IMMED bit, for a faster * command completion, they can mask their return value with * SDEG_RES_IMMED_MASK . */ #define SDEG_RES_IMMED_MASK 0x40000000 static int resp_inquiry(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_report_luns(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_requests(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_mode_sense(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_mode_select(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_log_sense(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_readcap(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_read_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_dt0(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_scat(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_start_stop(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_readcap16(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_get_lba_status(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_report_tgtpgs(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_unmap(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_rsup_opcodes(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_rsup_tmfs(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_verify(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_same_10(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_same_16(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_comp_write(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_write_buffer(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_sync_cache(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_pre_fetch(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_report_zones(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_open_zone(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_close_zone(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_finish_zone(struct scsi_cmnd *, struct sdebug_dev_info *); static int resp_rwp_zone(struct scsi_cmnd *, struct sdebug_dev_info *); static int sdebug_do_add_host(bool mk_new_store); static int sdebug_add_host_helper(int per_host_idx); static void sdebug_do_remove_host(bool the_end); static int sdebug_add_store(void); static void sdebug_erase_store(int idx, struct sdeb_store_info *sip); static void sdebug_erase_all_stores(bool apart_from_first); static void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp); /* * The following are overflow arrays for cdbs that "hit" the same index in * the opcode_info_arr array. The most time sensitive (or commonly used) cdb * should be placed in opcode_info_arr[], the others should be placed here. */ static const struct opcode_info_t msense_iarr[] = { {0, 0x1a, 0, F_D_IN, NULL, NULL, {6, 0xe8, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, }; static const struct opcode_info_t mselect_iarr[] = { {0, 0x15, 0, F_D_OUT, NULL, NULL, {6, 0xf1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, }; static const struct opcode_info_t read_iarr[] = { {0, 0x28, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(10) */ {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {0, 0x8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL, /* READ(6) */ {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0xa8, 0, F_D_IN | FF_MEDIA_IO, resp_read_dt0, NULL,/* READ(12) */ {12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7, 0, 0, 0, 0} }, }; static const struct opcode_info_t write_iarr[] = { {0, 0x2a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(10) */ NULL, {10, 0xfb, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {0, 0xa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(6) */ NULL, {6, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0xaa, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, /* WRITE(12) */ NULL, {12, 0xfb, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7, 0, 0, 0, 0} }, }; static const struct opcode_info_t verify_iarr[] = { {0, 0x2f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify,/* VERIFY(10) */ NULL, {10, 0xf7, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, }; static const struct opcode_info_t sa_in_16_iarr[] = { {0, 0x9e, 0x12, F_SA_LOW | F_D_IN, resp_get_lba_status, NULL, {16, 0x12, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0xc7} }, /* GET LBA STATUS(16) */ }; static const struct opcode_info_t vl_iarr[] = { /* VARIABLE LENGTH */ {0, 0x7f, 0xb, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_dt0, NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0xb, 0xfa, 0, 0xff, 0xff, 0xff, 0xff} }, /* WRITE(32) */ {0, 0x7f, 0x11, F_SA_HIGH | F_D_OUT | FF_MEDIA_IO, resp_write_scat, NULL, {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x11, 0xf8, 0, 0xff, 0xff, 0x0, 0x0} }, /* WRITE SCATTERED(32) */ }; static const struct opcode_info_t maint_in_iarr[] = { /* MAINT IN */ {0, 0xa3, 0xc, F_SA_LOW | F_D_IN, resp_rsup_opcodes, NULL, {12, 0xc, 0x87, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, /* REPORT SUPPORTED OPERATION CODES */ {0, 0xa3, 0xd, F_SA_LOW | F_D_IN, resp_rsup_tmfs, NULL, {12, 0xd, 0x80, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, /* REPORTED SUPPORTED TASK MANAGEMENT FUNCTIONS */ }; static const struct opcode_info_t write_same_iarr[] = { {0, 0x93, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_16, NULL, {16, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* WRITE SAME(16) */ }; static const struct opcode_info_t reserve_iarr[] = { {0, 0x16, 0, F_D_OUT, NULL, NULL, /* RESERVE(6) */ {6, 0x1f, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, }; static const struct opcode_info_t release_iarr[] = { {0, 0x17, 0, F_D_OUT, NULL, NULL, /* RELEASE(6) */ {6, 0x1f, 0xff, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, }; static const struct opcode_info_t sync_cache_iarr[] = { {0, 0x91, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, NULL, {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* SYNC_CACHE (16) */ }; static const struct opcode_info_t pre_fetch_iarr[] = { {0, 0x90, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, NULL, {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* PRE-FETCH (16) */ }; static const struct opcode_info_t zone_out_iarr[] = { /* ZONE OUT(16) */ {0, 0x94, 0x1, F_SA_LOW | F_M_ACCESS, resp_close_zone, NULL, {16, 0x1, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* CLOSE ZONE */ {0, 0x94, 0x2, F_SA_LOW | F_M_ACCESS, resp_finish_zone, NULL, {16, 0x2, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* FINISH ZONE */ {0, 0x94, 0x4, F_SA_LOW | F_M_ACCESS, resp_rwp_zone, NULL, {16, 0x4, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0xff, 0xff, 0x1, 0xc7} }, /* RESET WRITE POINTER */ }; static const struct opcode_info_t zone_in_iarr[] = { /* ZONE IN(16) */ {0, 0x95, 0x6, F_SA_LOW | F_D_IN | F_M_ACCESS, NULL, NULL, {16, 0x6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, /* REPORT ZONES */ }; /* This array is accessed via SDEB_I_* values. Make sure all are mapped, * plus the terminating elements for logic that scans this table such as * REPORT SUPPORTED OPERATION CODES. */ static const struct opcode_info_t opcode_info_arr[SDEB_I_LAST_ELEM_P1 + 1] = { /* 0 */ {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* unknown opcodes */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0x12, 0, FF_RESPOND | F_D_IN, resp_inquiry, NULL, /* INQUIRY */ {6, 0xe3, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0xa0, 0, FF_RESPOND | F_D_IN, resp_report_luns, NULL, {12, 0xe3, 0xff, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, /* REPORT LUNS */ {0, 0x3, 0, FF_RESPOND | F_D_IN, resp_requests, NULL, {6, 0xe1, 0, 0, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0x0, 0, F_M_ACCESS | F_RL_WLUN_OK, NULL, NULL,/* TEST UNIT READY */ {6, 0, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, /* 5 */ {ARRAY_SIZE(msense_iarr), 0x5a, 0, F_D_IN, /* MODE SENSE(10) */ resp_mode_sense, msense_iarr, {10, 0xf8, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(mselect_iarr), 0x55, 0, F_D_OUT, /* MODE SELECT(10) */ resp_mode_select, mselect_iarr, {10, 0xf1, 0, 0, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {0, 0x4d, 0, F_D_IN, resp_log_sense, NULL, /* LOG SENSE */ {10, 0xe3, 0xff, 0xff, 0, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {0, 0x25, 0, F_D_IN, resp_readcap, NULL, /* READ CAPACITY(10) */ {10, 0xe1, 0xff, 0xff, 0xff, 0xff, 0, 0, 0x1, 0xc7, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(read_iarr), 0x88, 0, F_D_IN | FF_MEDIA_IO, /* READ(16) */ resp_read_dt0, read_iarr, {16, 0xfe, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* 10 */ {ARRAY_SIZE(write_iarr), 0x8a, 0, F_D_OUT | FF_MEDIA_IO, resp_write_dt0, write_iarr, /* WRITE(16) */ {16, 0xfa, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, {0, 0x1b, 0, F_SSU_DELAY, resp_start_stop, NULL,/* START STOP UNIT */ {6, 0x1, 0, 0xf, 0xf7, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(sa_in_16_iarr), 0x9e, 0x10, F_SA_LOW | F_D_IN, resp_readcap16, sa_in_16_iarr, /* SA_IN(16), READ CAPACITY(16) */ {16, 0x10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x1, 0xc7} }, {0, 0x9f, 0x12, F_SA_LOW | F_D_OUT | FF_MEDIA_IO, resp_write_scat, NULL, {16, 0x12, 0xf9, 0x0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7} }, /* SA_OUT(16), WRITE SCAT(16) */ {ARRAY_SIZE(maint_in_iarr), 0xa3, 0xa, F_SA_LOW | F_D_IN, resp_report_tgtpgs, /* MAINT IN, REPORT TARGET PORT GROUPS */ maint_in_iarr, {12, 0xea, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0, 0xc7, 0, 0, 0, 0} }, /* 15 */ {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* MAINT OUT */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(verify_iarr), 0x8f, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_verify, /* VERIFY(16) */ verify_iarr, {16, 0xf6, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xc7} }, {ARRAY_SIZE(vl_iarr), 0x7f, 0x9, F_SA_HIGH | F_D_IN | FF_MEDIA_IO, resp_read_dt0, vl_iarr, /* VARIABLE LENGTH, READ(32) */ {32, 0xc7, 0, 0, 0, 0, 0x3f, 0x18, 0x0, 0x9, 0xfe, 0, 0xff, 0xff, 0xff, 0xff} }, {ARRAY_SIZE(reserve_iarr), 0x56, 0, F_D_OUT, NULL, reserve_iarr, /* RESERVE(10) <no response function> */ {10, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(release_iarr), 0x57, 0, F_D_OUT, NULL, release_iarr, /* RELEASE(10) <no response function> */ {10, 0x13, 0xff, 0xff, 0, 0, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, /* 20 */ {0, 0x1e, 0, 0, NULL, NULL, /* ALLOW REMOVAL */ {6, 0, 0, 0, 0x3, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0x1, 0, 0, resp_start_stop, NULL, /* REWIND ?? */ {6, 0x1, 0, 0, 0, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0, 0, F_INV_OP | FF_RESPOND, NULL, NULL, /* ATA_PT */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0x1d, F_D_OUT, 0, NULL, NULL, /* SEND DIAGNOSTIC */ {6, 0xf7, 0, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, {0, 0x42, 0, F_D_OUT | FF_MEDIA_IO, resp_unmap, NULL, /* UNMAP */ {10, 0x1, 0, 0, 0, 0, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, /* 25 */ {0, 0x3b, 0, F_D_OUT_MAYBE, resp_write_buffer, NULL, {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, /* WRITE_BUFFER */ {ARRAY_SIZE(write_same_iarr), 0x41, 0, F_D_OUT_MAYBE | FF_MEDIA_IO, resp_write_same_10, write_same_iarr, /* WRITE SAME(10) */ {10, 0xff, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, {ARRAY_SIZE(sync_cache_iarr), 0x35, 0, F_SYNC_DELAY | F_M_ACCESS, resp_sync_cache, sync_cache_iarr, {10, 0x7, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, /* SYNC_CACHE (10) */ {0, 0x89, 0, F_D_OUT | FF_MEDIA_IO, resp_comp_write, NULL, {16, 0xf8, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0, 0xff, 0x3f, 0xc7} }, /* COMPARE AND WRITE */ {ARRAY_SIZE(pre_fetch_iarr), 0x34, 0, F_SYNC_DELAY | FF_MEDIA_IO, resp_pre_fetch, pre_fetch_iarr, {10, 0x2, 0xff, 0xff, 0xff, 0xff, 0x3f, 0xff, 0xff, 0xc7, 0, 0, 0, 0, 0, 0} }, /* PRE-FETCH (10) */ /* 30 */ {ARRAY_SIZE(zone_out_iarr), 0x94, 0x3, F_SA_LOW | F_M_ACCESS, resp_open_zone, zone_out_iarr, /* ZONE_OUT(16), OPEN ZONE) */ {16, 0x3 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x0, 0x0, 0xff, 0xff, 0x1, 0xc7} }, {ARRAY_SIZE(zone_in_iarr), 0x95, 0x0, F_SA_LOW | F_M_ACCESS, resp_report_zones, zone_in_iarr, /* ZONE_IN(16), REPORT ZONES) */ {16, 0x0 /* SA */, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xbf, 0xc7} }, /* sentinel */ {0xff, 0, 0, 0, NULL, NULL, /* terminating element */ {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0} }, }; static int sdebug_num_hosts; static int sdebug_add_host = DEF_NUM_HOST; /* in sysfs this is relative */ static int sdebug_ato = DEF_ATO; static int sdebug_cdb_len = DEF_CDB_LEN; static int sdebug_jdelay = DEF_JDELAY; /* if > 0 then unit is jiffies */ static int sdebug_dev_size_mb = DEF_DEV_SIZE_PRE_INIT; static int sdebug_dif = DEF_DIF; static int sdebug_dix = DEF_DIX; static int sdebug_dsense = DEF_D_SENSE; static int sdebug_every_nth = DEF_EVERY_NTH; static int sdebug_fake_rw = DEF_FAKE_RW; static unsigned int sdebug_guard = DEF_GUARD; static int sdebug_host_max_queue; /* per host */ static int sdebug_lowest_aligned = DEF_LOWEST_ALIGNED; static int sdebug_max_luns = DEF_MAX_LUNS; static int sdebug_max_queue = SDEBUG_CANQUEUE; /* per submit queue */ static unsigned int sdebug_medium_error_start = OPT_MEDIUM_ERR_ADDR; static int sdebug_medium_error_count = OPT_MEDIUM_ERR_NUM; static int sdebug_ndelay = DEF_NDELAY; /* if > 0 then unit is nanoseconds */ static int sdebug_no_lun_0 = DEF_NO_LUN_0; static int sdebug_no_uld; static int sdebug_num_parts = DEF_NUM_PARTS; static int sdebug_num_tgts = DEF_NUM_TGTS; /* targets per host */ static int sdebug_opt_blks = DEF_OPT_BLKS; static int sdebug_opts = DEF_OPTS; static int sdebug_physblk_exp = DEF_PHYSBLK_EXP; static int sdebug_opt_xferlen_exp = DEF_OPT_XFERLEN_EXP; static int sdebug_ptype = DEF_PTYPE; /* SCSI peripheral device type */ static int sdebug_scsi_level = DEF_SCSI_LEVEL; static int sdebug_sector_size = DEF_SECTOR_SIZE; static int sdeb_tur_ms_to_ready = DEF_TUR_MS_TO_READY; static int sdebug_virtual_gb = DEF_VIRTUAL_GB; static int sdebug_vpd_use_hostno = DEF_VPD_USE_HOSTNO; static unsigned int sdebug_lbpu = DEF_LBPU; static unsigned int sdebug_lbpws = DEF_LBPWS; static unsigned int sdebug_lbpws10 = DEF_LBPWS10; static unsigned int sdebug_lbprz = DEF_LBPRZ; static unsigned int sdebug_unmap_alignment = DEF_UNMAP_ALIGNMENT; static unsigned int sdebug_unmap_granularity = DEF_UNMAP_GRANULARITY; static unsigned int sdebug_unmap_max_blocks = DEF_UNMAP_MAX_BLOCKS; static unsigned int sdebug_unmap_max_desc = DEF_UNMAP_MAX_DESC; static unsigned int sdebug_write_same_length = DEF_WRITESAME_LENGTH; static int sdebug_uuid_ctl = DEF_UUID_CTL; static bool sdebug_random = DEF_RANDOM; static bool sdebug_per_host_store = DEF_PER_HOST_STORE; static bool sdebug_removable = DEF_REMOVABLE; static bool sdebug_clustering; static bool sdebug_host_lock = DEF_HOST_LOCK; static bool sdebug_strict = DEF_STRICT; static bool sdebug_any_injecting_opt; static bool sdebug_no_rwlock; static bool sdebug_verbose; static bool have_dif_prot; static bool write_since_sync; static bool sdebug_statistics = DEF_STATISTICS; static bool sdebug_wp; static bool sdebug_allow_restart; /* Following enum: 0: no zbc, def; 1: host aware; 2: host managed */ static enum blk_zoned_model sdeb_zbc_model = BLK_ZONED_NONE; static char *sdeb_zbc_model_s; enum sam_lun_addr_method {SAM_LUN_AM_PERIPHERAL = 0x0, SAM_LUN_AM_FLAT = 0x1, SAM_LUN_AM_LOGICAL_UNIT = 0x2, SAM_LUN_AM_EXTENDED = 0x3}; static enum sam_lun_addr_method sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; static int sdebug_lun_am_i = (int)SAM_LUN_AM_PERIPHERAL; static unsigned int sdebug_store_sectors; static sector_t sdebug_capacity; /* in sectors */ /* old BIOS stuff, kernel may get rid of them but some mode sense pages may still need them */ static int sdebug_heads; /* heads per disk */ static int sdebug_cylinders_per; /* cylinders per surface */ static int sdebug_sectors_per; /* sectors per cylinder */ static LIST_HEAD(sdebug_host_list); static DEFINE_MUTEX(sdebug_host_list_mutex); static struct xarray per_store_arr; static struct xarray *per_store_ap = &per_store_arr; static int sdeb_first_idx = -1; /* invalid index ==> none created */ static int sdeb_most_recent_idx = -1; static DEFINE_RWLOCK(sdeb_fake_rw_lck); /* need a RW lock when fake_rw=1 */ static unsigned long map_size; static int num_aborts; static int num_dev_resets; static int num_target_resets; static int num_bus_resets; static int num_host_resets; static int dix_writes; static int dix_reads; static int dif_errors; /* ZBC global data */ static bool sdeb_zbc_in_use; /* true for host-aware and host-managed disks */ static int sdeb_zbc_zone_cap_mb; static int sdeb_zbc_zone_size_mb; static int sdeb_zbc_max_open = DEF_ZBC_MAX_OPEN_ZONES; static int sdeb_zbc_nr_conv = DEF_ZBC_NR_CONV_ZONES; static int submit_queues = DEF_SUBMIT_QUEUES; /* > 1 for multi-queue (mq) */ static int poll_queues; /* iouring iopoll interface.*/ static char sdebug_proc_name[] = MY_NAME; static const char *my_name = MY_NAME; static struct bus_type pseudo_lld_bus; static struct device_driver sdebug_driverfs_driver = { .name = sdebug_proc_name, .bus = &pseudo_lld_bus, }; static const int check_condition_result = SAM_STAT_CHECK_CONDITION; static const int illegal_condition_result = (DID_ABORT << 16) | SAM_STAT_CHECK_CONDITION; static const int device_qfull_result = (DID_ABORT << 16) | SAM_STAT_TASK_SET_FULL; static const int condition_met_result = SAM_STAT_CONDITION_MET; static struct dentry *sdebug_debugfs_root; static void sdebug_err_free(struct rcu_head *head) { struct sdebug_err_inject *inject = container_of(head, typeof(*inject), rcu); kfree(inject); } static void sdebug_err_add(struct scsi_device *sdev, struct sdebug_err_inject *new) { struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; struct sdebug_err_inject *err; spin_lock(&devip->list_lock); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == new->type && err->cmd == new->cmd) { list_del_rcu(&err->list); call_rcu(&err->rcu, sdebug_err_free); } } list_add_tail_rcu(&new->list, &devip->inject_err_list); spin_unlock(&devip->list_lock); } static int sdebug_err_remove(struct scsi_device *sdev, const char *buf, size_t count) { struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; struct sdebug_err_inject *err; int type; unsigned char cmd; if (sscanf(buf, "- %d %hhx", &type, &cmd) != 2) { kfree(buf); return -EINVAL; } spin_lock(&devip->list_lock); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == type && err->cmd == cmd) { list_del_rcu(&err->list); call_rcu(&err->rcu, sdebug_err_free); spin_unlock(&devip->list_lock); kfree(buf); return count; } } spin_unlock(&devip->list_lock); kfree(buf); return -EINVAL; } static int sdebug_error_show(struct seq_file *m, void *p) { struct scsi_device *sdev = (struct scsi_device *)m->private; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdev->hostdata; struct sdebug_err_inject *err; seq_puts(m, "Type\tCount\tCommand\n"); rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { switch (err->type) { case ERR_TMOUT_CMD: case ERR_ABORT_CMD_FAILED: case ERR_LUN_RESET_FAILED: seq_printf(m, "%d\t%d\t0x%x\n", err->type, err->cnt, err->cmd); break; case ERR_FAIL_QUEUE_CMD: seq_printf(m, "%d\t%d\t0x%x\t0x%x\n", err->type, err->cnt, err->cmd, err->queuecmd_ret); break; case ERR_FAIL_CMD: seq_printf(m, "%d\t%d\t0x%x\t0x%x 0x%x 0x%x 0x%x 0x%x 0x%x\n", err->type, err->cnt, err->cmd, err->host_byte, err->driver_byte, err->status_byte, err->sense_key, err->asc, err->asq); break; } } rcu_read_unlock(); return 0; } static int sdebug_error_open(struct inode *inode, struct file *file) { return single_open(file, sdebug_error_show, inode->i_private); } static ssize_t sdebug_error_write(struct file *file, const char __user *ubuf, size_t count, loff_t *ppos) { char *buf; unsigned int inject_type; struct sdebug_err_inject *inject; struct scsi_device *sdev = (struct scsi_device *)file->f_inode->i_private; buf = kzalloc(count + 1, GFP_KERNEL); if (!buf) return -ENOMEM; if (copy_from_user(buf, ubuf, count)) { kfree(buf); return -EFAULT; } if (buf[0] == '-') return sdebug_err_remove(sdev, buf, count); if (sscanf(buf, "%d", &inject_type) != 1) { kfree(buf); return -EINVAL; } inject = kzalloc(sizeof(struct sdebug_err_inject), GFP_KERNEL); if (!inject) { kfree(buf); return -ENOMEM; } switch (inject_type) { case ERR_TMOUT_CMD: case ERR_ABORT_CMD_FAILED: case ERR_LUN_RESET_FAILED: if (sscanf(buf, "%d %d %hhx", &inject->type, &inject->cnt, &inject->cmd) != 3) goto out_error; break; case ERR_FAIL_QUEUE_CMD: if (sscanf(buf, "%d %d %hhx %x", &inject->type, &inject->cnt, &inject->cmd, &inject->queuecmd_ret) != 4) goto out_error; break; case ERR_FAIL_CMD: if (sscanf(buf, "%d %d %hhx %hhx %hhx %hhx %hhx %hhx %hhx", &inject->type, &inject->cnt, &inject->cmd, &inject->host_byte, &inject->driver_byte, &inject->status_byte, &inject->sense_key, &inject->asc, &inject->asq) != 9) goto out_error; break; default: goto out_error; break; } kfree(buf); sdebug_err_add(sdev, inject); return count; out_error: kfree(buf); kfree(inject); return -EINVAL; } static const struct file_operations sdebug_error_fops = { .open = sdebug_error_open, .read = seq_read, .write = sdebug_error_write, .release = single_release, }; static int sdebug_target_reset_fail_show(struct seq_file *m, void *p) { struct scsi_target *starget = (struct scsi_target *)m->private; struct sdebug_target_info *targetip = (struct sdebug_target_info *)starget->hostdata; if (targetip) seq_printf(m, "%c\n", targetip->reset_fail ? 'Y' : 'N'); return 0; } static int sdebug_target_reset_fail_open(struct inode *inode, struct file *file) { return single_open(file, sdebug_target_reset_fail_show, inode->i_private); } static ssize_t sdebug_target_reset_fail_write(struct file *file, const char __user *ubuf, size_t count, loff_t *ppos) { int ret; struct scsi_target *starget = (struct scsi_target *)file->f_inode->i_private; struct sdebug_target_info *targetip = (struct sdebug_target_info *)starget->hostdata; if (targetip) { ret = kstrtobool_from_user(ubuf, count, &targetip->reset_fail); return ret < 0 ? ret : count; } return -ENODEV; } static const struct file_operations sdebug_target_reset_fail_fops = { .open = sdebug_target_reset_fail_open, .read = seq_read, .write = sdebug_target_reset_fail_write, .release = single_release, }; static int sdebug_target_alloc(struct scsi_target *starget) { struct sdebug_target_info *targetip; targetip = kzalloc(sizeof(struct sdebug_target_info), GFP_KERNEL); if (!targetip) return -ENOMEM; targetip->debugfs_entry = debugfs_create_dir(dev_name(&starget->dev), sdebug_debugfs_root); debugfs_create_file("fail_reset", 0600, targetip->debugfs_entry, starget, &sdebug_target_reset_fail_fops); starget->hostdata = targetip; return 0; } static void sdebug_tartget_cleanup_async(void *data, async_cookie_t cookie) { struct sdebug_target_info *targetip = data; debugfs_remove(targetip->debugfs_entry); kfree(targetip); } static void sdebug_target_destroy(struct scsi_target *starget) { struct sdebug_target_info *targetip; targetip = (struct sdebug_target_info *)starget->hostdata; if (targetip) { starget->hostdata = NULL; async_schedule(sdebug_tartget_cleanup_async, targetip); } } /* Only do the extra work involved in logical block provisioning if one or * more of the lbpu, lbpws or lbpws10 parameters are given and we are doing * real reads and writes (i.e. not skipping them for speed). */ static inline bool scsi_debug_lbp(void) { return 0 == sdebug_fake_rw && (sdebug_lbpu || sdebug_lbpws || sdebug_lbpws10); } static void *lba2fake_store(struct sdeb_store_info *sip, unsigned long long lba) { struct sdeb_store_info *lsip = sip; lba = do_div(lba, sdebug_store_sectors); if (!sip || !sip->storep) { WARN_ON_ONCE(true); lsip = xa_load(per_store_ap, 0); /* should never be NULL */ } return lsip->storep + lba * sdebug_sector_size; } static struct t10_pi_tuple *dif_store(struct sdeb_store_info *sip, sector_t sector) { sector = sector_div(sector, sdebug_store_sectors); return sip->dif_storep + sector; } static void sdebug_max_tgts_luns(void) { struct sdebug_host_info *sdbg_host; struct Scsi_Host *hpnt; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { hpnt = sdbg_host->shost; if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) hpnt->max_id = sdebug_num_tgts + 1; else hpnt->max_id = sdebug_num_tgts; /* sdebug_max_luns; */ hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; } mutex_unlock(&sdebug_host_list_mutex); } enum sdeb_cmd_data {SDEB_IN_DATA = 0, SDEB_IN_CDB = 1}; /* Set in_bit to -1 to indicate no bit position of invalid field */ static void mk_sense_invalid_fld(struct scsi_cmnd *scp, enum sdeb_cmd_data c_d, int in_byte, int in_bit) { unsigned char *sbuff; u8 sks[4]; int sl, asc; sbuff = scp->sense_buffer; if (!sbuff) { sdev_printk(KERN_ERR, scp->device, "%s: sense_buffer is NULL\n", __func__); return; } asc = c_d ? INVALID_FIELD_IN_CDB : INVALID_FIELD_IN_PARAM_LIST; memset(sbuff, 0, SCSI_SENSE_BUFFERSIZE); scsi_build_sense(scp, sdebug_dsense, ILLEGAL_REQUEST, asc, 0); memset(sks, 0, sizeof(sks)); sks[0] = 0x80; if (c_d) sks[0] |= 0x40; if (in_bit >= 0) { sks[0] |= 0x8; sks[0] |= 0x7 & in_bit; } put_unaligned_be16(in_byte, sks + 1); if (sdebug_dsense) { sl = sbuff[7] + 8; sbuff[7] = sl; sbuff[sl] = 0x2; sbuff[sl + 1] = 0x6; memcpy(sbuff + sl + 4, sks, 3); } else memcpy(sbuff + 15, sks, 3); if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq" "]: [0x5,0x%x,0x0] %c byte=%d, bit=%d\n", my_name, asc, c_d ? 'C' : 'D', in_byte, in_bit); } static void mk_sense_buffer(struct scsi_cmnd *scp, int key, int asc, int asq) { if (!scp->sense_buffer) { sdev_printk(KERN_ERR, scp->device, "%s: sense_buffer is NULL\n", __func__); return; } memset(scp->sense_buffer, 0, SCSI_SENSE_BUFFERSIZE); scsi_build_sense(scp, sdebug_dsense, key, asc, asq); if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: [sense_key,asc,ascq]: [0x%x,0x%x,0x%x]\n", my_name, key, asc, asq); } static void mk_sense_invalid_opcode(struct scsi_cmnd *scp) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_OPCODE, 0); } static int scsi_debug_ioctl(struct scsi_device *dev, unsigned int cmd, void __user *arg) { if (sdebug_verbose) { if (0x1261 == cmd) sdev_printk(KERN_INFO, dev, "%s: BLKFLSBUF [0x1261]\n", __func__); else if (0x5331 == cmd) sdev_printk(KERN_INFO, dev, "%s: CDROM_GET_CAPABILITY [0x5331]\n", __func__); else sdev_printk(KERN_INFO, dev, "%s: cmd=0x%x\n", __func__, cmd); } return -EINVAL; /* return -ENOTTY; // correct return but upsets fdisk */ } static void config_cdb_len(struct scsi_device *sdev) { switch (sdebug_cdb_len) { case 6: /* suggest 6 byte READ, WRITE and MODE SENSE/SELECT */ sdev->use_10_for_rw = false; sdev->use_16_for_rw = false; sdev->use_10_for_ms = false; break; case 10: /* suggest 10 byte RWs and 6 byte MODE SENSE/SELECT */ sdev->use_10_for_rw = true; sdev->use_16_for_rw = false; sdev->use_10_for_ms = false; break; case 12: /* suggest 10 byte RWs and 10 byte MODE SENSE/SELECT */ sdev->use_10_for_rw = true; sdev->use_16_for_rw = false; sdev->use_10_for_ms = true; break; case 16: sdev->use_10_for_rw = false; sdev->use_16_for_rw = true; sdev->use_10_for_ms = true; break; case 32: /* No knobs to suggest this so same as 16 for now */ sdev->use_10_for_rw = false; sdev->use_16_for_rw = true; sdev->use_10_for_ms = true; break; default: pr_warn("unexpected cdb_len=%d, force to 10\n", sdebug_cdb_len); sdev->use_10_for_rw = true; sdev->use_16_for_rw = false; sdev->use_10_for_ms = false; sdebug_cdb_len = 10; break; } } static void all_config_cdb_len(void) { struct sdebug_host_info *sdbg_host; struct Scsi_Host *shost; struct scsi_device *sdev; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { shost = sdbg_host->shost; shost_for_each_device(sdev, shost) { config_cdb_len(sdev); } } mutex_unlock(&sdebug_host_list_mutex); } static void clear_luns_changed_on_target(struct sdebug_dev_info *devip) { struct sdebug_host_info *sdhp = devip->sdbg_host; struct sdebug_dev_info *dp; list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { if ((devip->sdbg_host == dp->sdbg_host) && (devip->target == dp->target)) { clear_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); } } } static int make_ua(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int k; k = find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS); if (k != SDEBUG_NUM_UAS) { const char *cp = NULL; switch (k) { case SDEBUG_UA_POR: mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, POWER_ON_RESET_ASCQ); if (sdebug_verbose) cp = "power on reset"; break; case SDEBUG_UA_POOCCUR: mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, POWER_ON_OCCURRED_ASCQ); if (sdebug_verbose) cp = "power on occurred"; break; case SDEBUG_UA_BUS_RESET: mk_sense_buffer(scp, UNIT_ATTENTION, UA_RESET_ASC, BUS_RESET_ASCQ); if (sdebug_verbose) cp = "bus reset"; break; case SDEBUG_UA_MODE_CHANGED: mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, MODE_CHANGED_ASCQ); if (sdebug_verbose) cp = "mode parameters changed"; break; case SDEBUG_UA_CAPACITY_CHANGED: mk_sense_buffer(scp, UNIT_ATTENTION, UA_CHANGED_ASC, CAPACITY_CHANGED_ASCQ); if (sdebug_verbose) cp = "capacity data changed"; break; case SDEBUG_UA_MICROCODE_CHANGED: mk_sense_buffer(scp, UNIT_ATTENTION, TARGET_CHANGED_ASC, MICROCODE_CHANGED_ASCQ); if (sdebug_verbose) cp = "microcode has been changed"; break; case SDEBUG_UA_MICROCODE_CHANGED_WO_RESET: mk_sense_buffer(scp, UNIT_ATTENTION, TARGET_CHANGED_ASC, MICROCODE_CHANGED_WO_RESET_ASCQ); if (sdebug_verbose) cp = "microcode has been changed without reset"; break; case SDEBUG_UA_LUNS_CHANGED: /* * SPC-3 behavior is to report a UNIT ATTENTION with * ASC/ASCQ REPORTED LUNS DATA HAS CHANGED on every LUN * on the target, until a REPORT LUNS command is * received. SPC-4 behavior is to report it only once. * NOTE: sdebug_scsi_level does not use the same * values as struct scsi_device->scsi_level. */ if (sdebug_scsi_level >= 6) /* SPC-4 and above */ clear_luns_changed_on_target(devip); mk_sense_buffer(scp, UNIT_ATTENTION, TARGET_CHANGED_ASC, LUNS_CHANGED_ASCQ); if (sdebug_verbose) cp = "reported luns data has changed"; break; default: pr_warn("unexpected unit attention code=%d\n", k); if (sdebug_verbose) cp = "unknown"; break; } clear_bit(k, devip->uas_bm); if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s reports: Unit attention: %s\n", my_name, cp); return check_condition_result; } return 0; } /* Build SCSI "data-in" buffer. Returns 0 if ok else (DID_ERROR << 16). */ static int fill_from_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, int arr_len) { int act_len; struct scsi_data_buffer *sdb = &scp->sdb; if (!sdb->length) return 0; if (scp->sc_data_direction != DMA_FROM_DEVICE) return DID_ERROR << 16; act_len = sg_copy_from_buffer(sdb->table.sgl, sdb->table.nents, arr, arr_len); scsi_set_resid(scp, scsi_bufflen(scp) - act_len); return 0; } /* Partial build of SCSI "data-in" buffer. Returns 0 if ok else * (DID_ERROR << 16). Can write to offset in data-in buffer. If multiple * calls, not required to write in ascending offset order. Assumes resid * set to scsi_bufflen() prior to any calls. */ static int p_fill_from_dev_buffer(struct scsi_cmnd *scp, const void *arr, int arr_len, unsigned int off_dst) { unsigned int act_len, n; struct scsi_data_buffer *sdb = &scp->sdb; off_t skip = off_dst; if (sdb->length <= off_dst) return 0; if (scp->sc_data_direction != DMA_FROM_DEVICE) return DID_ERROR << 16; act_len = sg_pcopy_from_buffer(sdb->table.sgl, sdb->table.nents, arr, arr_len, skip); pr_debug("%s: off_dst=%u, scsi_bufflen=%u, act_len=%u, resid=%d\n", __func__, off_dst, scsi_bufflen(scp), act_len, scsi_get_resid(scp)); n = scsi_bufflen(scp) - (off_dst + act_len); scsi_set_resid(scp, min_t(u32, scsi_get_resid(scp), n)); return 0; } /* Fetches from SCSI "data-out" buffer. Returns number of bytes fetched into * 'arr' or -1 if error. */ static int fetch_to_dev_buffer(struct scsi_cmnd *scp, unsigned char *arr, int arr_len) { if (!scsi_bufflen(scp)) return 0; if (scp->sc_data_direction != DMA_TO_DEVICE) return -1; return scsi_sg_copy_to_buffer(scp, arr, arr_len); } static char sdebug_inq_vendor_id[9] = "Linux "; static char sdebug_inq_product_id[17] = "scsi_debug "; static char sdebug_inq_product_rev[5] = SDEBUG_VERSION; /* Use some locally assigned NAAs for SAS addresses. */ static const u64 naa3_comp_a = 0x3222222000000000ULL; static const u64 naa3_comp_b = 0x3333333000000000ULL; static const u64 naa3_comp_c = 0x3111111000000000ULL; /* Device identification VPD page. Returns number of bytes placed in arr */ static int inquiry_vpd_83(unsigned char *arr, int port_group_id, int target_dev_id, int dev_id_num, const char *dev_id_str, int dev_id_str_len, const uuid_t *lu_name) { int num, port_a; char b[32]; port_a = target_dev_id + 1; /* T10 vendor identifier field format (faked) */ arr[0] = 0x2; /* ASCII */ arr[1] = 0x1; arr[2] = 0x0; memcpy(&arr[4], sdebug_inq_vendor_id, 8); memcpy(&arr[12], sdebug_inq_product_id, 16); memcpy(&arr[28], dev_id_str, dev_id_str_len); num = 8 + 16 + dev_id_str_len; arr[3] = num; num += 4; if (dev_id_num >= 0) { if (sdebug_uuid_ctl) { /* Locally assigned UUID */ arr[num++] = 0x1; /* binary (not necessarily sas) */ arr[num++] = 0xa; /* PIV=0, lu, naa */ arr[num++] = 0x0; arr[num++] = 0x12; arr[num++] = 0x10; /* uuid type=1, locally assigned */ arr[num++] = 0x0; memcpy(arr + num, lu_name, 16); num += 16; } else { /* NAA-3, Logical unit identifier (binary) */ arr[num++] = 0x1; /* binary (not necessarily sas) */ arr[num++] = 0x3; /* PIV=0, lu, naa */ arr[num++] = 0x0; arr[num++] = 0x8; put_unaligned_be64(naa3_comp_b + dev_id_num, arr + num); num += 8; } /* Target relative port number */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x94; /* PIV=1, target port, rel port */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x4; /* length */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x1; /* relative port A */ } /* NAA-3, Target port identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* piv=1, target port, naa */ arr[num++] = 0x0; arr[num++] = 0x8; put_unaligned_be64(naa3_comp_a + port_a, arr + num); num += 8; /* NAA-3, Target port group identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x95; /* piv=1, target port group id */ arr[num++] = 0x0; arr[num++] = 0x4; arr[num++] = 0; arr[num++] = 0; put_unaligned_be16(port_group_id, arr + num); num += 2; /* NAA-3, Target device identifier */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0xa3; /* piv=1, target device, naa */ arr[num++] = 0x0; arr[num++] = 0x8; put_unaligned_be64(naa3_comp_a + target_dev_id, arr + num); num += 8; /* SCSI name string: Target device identifier */ arr[num++] = 0x63; /* proto=sas, UTF-8 */ arr[num++] = 0xa8; /* piv=1, target device, SCSI name string */ arr[num++] = 0x0; arr[num++] = 24; memcpy(arr + num, "naa.32222220", 12); num += 12; snprintf(b, sizeof(b), "%08X", target_dev_id); memcpy(arr + num, b, 8); num += 8; memset(arr + num, 0, 4); num += 4; return num; } static unsigned char vpd84_data[] = { /* from 4th byte */ 0x22,0x22,0x22,0x0,0xbb,0x0, 0x22,0x22,0x22,0x0,0xbb,0x1, 0x22,0x22,0x22,0x0,0xbb,0x2, }; /* Software interface identification VPD page */ static int inquiry_vpd_84(unsigned char *arr) { memcpy(arr, vpd84_data, sizeof(vpd84_data)); return sizeof(vpd84_data); } /* Management network addresses VPD page */ static int inquiry_vpd_85(unsigned char *arr) { int num = 0; const char *na1 = "https://www.kernel.org/config"; const char *na2 = "http://www.kernel.org/log"; int plen, olen; arr[num++] = 0x1; /* lu, storage config */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; olen = strlen(na1); plen = olen + 1; if (plen % 4) plen = ((plen / 4) + 1) * 4; arr[num++] = plen; /* length, null termianted, padded */ memcpy(arr + num, na1, olen); memset(arr + num + olen, 0, plen - olen); num += plen; arr[num++] = 0x4; /* lu, logging */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; olen = strlen(na2); plen = olen + 1; if (plen % 4) plen = ((plen / 4) + 1) * 4; arr[num++] = plen; /* length, null terminated, padded */ memcpy(arr + num, na2, olen); memset(arr + num + olen, 0, plen - olen); num += plen; return num; } /* SCSI ports VPD page */ static int inquiry_vpd_88(unsigned char *arr, int target_dev_id) { int num = 0; int port_a, port_b; port_a = target_dev_id + 1; port_b = port_a + 1; arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x1; /* relative port 1 (primary) */ memset(arr + num, 0, 6); num += 6; arr[num++] = 0x0; arr[num++] = 12; /* length tp descriptor */ /* naa-5 target port identifier (A) */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* PIV=1, target port, NAA */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x8; /* length */ put_unaligned_be64(naa3_comp_a + port_a, arr + num); num += 8; arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x0; arr[num++] = 0x2; /* relative port 2 (secondary) */ memset(arr + num, 0, 6); num += 6; arr[num++] = 0x0; arr[num++] = 12; /* length tp descriptor */ /* naa-5 target port identifier (B) */ arr[num++] = 0x61; /* proto=sas, binary */ arr[num++] = 0x93; /* PIV=1, target port, NAA */ arr[num++] = 0x0; /* reserved */ arr[num++] = 0x8; /* length */ put_unaligned_be64(naa3_comp_a + port_b, arr + num); num += 8; return num; } static unsigned char vpd89_data[] = { /* from 4th byte */ 0,0,0,0, 'l','i','n','u','x',' ',' ',' ', 'S','A','T',' ','s','c','s','i','_','d','e','b','u','g',' ',' ', '1','2','3','4', 0x34,0,0,0,1,0,0,0,0,0,0,0,1,0,0,0,0,0,0,0, 0xec,0,0,0, 0x5a,0xc,0xff,0x3f,0x37,0xc8,0x10,0,0,0,0,0,0x3f,0,0,0, 0,0,0,0,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x58,0x20,0x20,0x20,0x20, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0,0,0,0x40,0x4,0,0x2e,0x33, 0x38,0x31,0x20,0x20,0x20,0x20,0x54,0x53,0x38,0x33,0x30,0x30,0x33,0x31, 0x53,0x41, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0x20,0x20, 0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20,0x20, 0x10,0x80, 0,0,0,0x2f,0,0,0,0x2,0,0x2,0x7,0,0xff,0xff,0x1,0, 0x3f,0,0xc1,0xff,0x3e,0,0x10,0x1,0xb0,0xf8,0x50,0x9,0,0,0x7,0, 0x3,0,0x78,0,0x78,0,0xf0,0,0x78,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0x2,0,0,0,0,0,0,0, 0x7e,0,0x1b,0,0x6b,0x34,0x1,0x7d,0x3,0x40,0x69,0x34,0x1,0x3c,0x3,0x40, 0x7f,0x40,0,0,0,0,0xfe,0xfe,0,0,0,0,0,0xfe,0,0, 0,0,0,0,0,0,0,0,0xb0,0xf8,0x50,0x9,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0x1,0,0xb0,0xf8,0x50,0x9,0xb0,0xf8,0x50,0x9,0x20,0x20,0x2,0,0xb6,0x42, 0,0x80,0x8a,0,0x6,0x3c,0xa,0x3c,0xff,0xff,0xc6,0x7,0,0x1,0,0x8, 0xf0,0xf,0,0x10,0x2,0,0x30,0,0,0,0,0,0,0,0x6,0xfe, 0,0,0x2,0,0x50,0,0x8a,0,0x4f,0x95,0,0,0x21,0,0xb,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0xa5,0x51, }; /* ATA Information VPD page */ static int inquiry_vpd_89(unsigned char *arr) { memcpy(arr, vpd89_data, sizeof(vpd89_data)); return sizeof(vpd89_data); } static unsigned char vpdb0_data[] = { /* from 4th byte */ 0,0,0,4, 0,0,0x4,0, 0,0,0,64, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, }; /* Block limits VPD page (SBC-3) */ static int inquiry_vpd_b0(unsigned char *arr) { unsigned int gran; memcpy(arr, vpdb0_data, sizeof(vpdb0_data)); /* Optimal transfer length granularity */ if (sdebug_opt_xferlen_exp != 0 && sdebug_physblk_exp < sdebug_opt_xferlen_exp) gran = 1 << sdebug_opt_xferlen_exp; else gran = 1 << sdebug_physblk_exp; put_unaligned_be16(gran, arr + 2); /* Maximum Transfer Length */ if (sdebug_store_sectors > 0x400) put_unaligned_be32(sdebug_store_sectors, arr + 4); /* Optimal Transfer Length */ put_unaligned_be32(sdebug_opt_blks, &arr[8]); if (sdebug_lbpu) { /* Maximum Unmap LBA Count */ put_unaligned_be32(sdebug_unmap_max_blocks, &arr[16]); /* Maximum Unmap Block Descriptor Count */ put_unaligned_be32(sdebug_unmap_max_desc, &arr[20]); } /* Unmap Granularity Alignment */ if (sdebug_unmap_alignment) { put_unaligned_be32(sdebug_unmap_alignment, &arr[28]); arr[28] |= 0x80; /* UGAVALID */ } /* Optimal Unmap Granularity */ put_unaligned_be32(sdebug_unmap_granularity, &arr[24]); /* Maximum WRITE SAME Length */ put_unaligned_be64(sdebug_write_same_length, &arr[32]); return 0x3c; /* Mandatory page length for Logical Block Provisioning */ } /* Block device characteristics VPD page (SBC-3) */ static int inquiry_vpd_b1(struct sdebug_dev_info *devip, unsigned char *arr) { memset(arr, 0, 0x3c); arr[0] = 0; arr[1] = 1; /* non rotating medium (e.g. solid state) */ arr[2] = 0; arr[3] = 5; /* less than 1.8" */ if (devip->zmodel == BLK_ZONED_HA) arr[4] = 1 << 4; /* zoned field = 01b */ return 0x3c; } /* Logical block provisioning VPD page (SBC-4) */ static int inquiry_vpd_b2(unsigned char *arr) { memset(arr, 0, 0x4); arr[0] = 0; /* threshold exponent */ if (sdebug_lbpu) arr[1] = 1 << 7; if (sdebug_lbpws) arr[1] |= 1 << 6; if (sdebug_lbpws10) arr[1] |= 1 << 5; if (sdebug_lbprz && scsi_debug_lbp()) arr[1] |= (sdebug_lbprz & 0x7) << 2; /* sbc4r07 and later */ /* anc_sup=0; dp=0 (no provisioning group descriptor) */ /* minimum_percentage=0; provisioning_type=0 (unknown) */ /* threshold_percentage=0 */ return 0x4; } /* Zoned block device characteristics VPD page (ZBC mandatory) */ static int inquiry_vpd_b6(struct sdebug_dev_info *devip, unsigned char *arr) { memset(arr, 0, 0x3c); arr[0] = 0x1; /* set URSWRZ (unrestricted read in seq. wr req zone) */ /* * Set Optimal number of open sequential write preferred zones and * Optimal number of non-sequentially written sequential write * preferred zones fields to 'not reported' (0xffffffff). Leave other * fields set to zero, apart from Max. number of open swrz_s field. */ put_unaligned_be32(0xffffffff, &arr[4]); put_unaligned_be32(0xffffffff, &arr[8]); if (sdeb_zbc_model == BLK_ZONED_HM && devip->max_open) put_unaligned_be32(devip->max_open, &arr[12]); else put_unaligned_be32(0xffffffff, &arr[12]); if (devip->zcap < devip->zsize) { arr[19] = ZBC_CONSTANT_ZONE_START_OFFSET; put_unaligned_be64(devip->zsize, &arr[20]); } else { arr[19] = 0; } return 0x3c; } #define SDEBUG_LONG_INQ_SZ 96 #define SDEBUG_MAX_INQ_ARR_SZ 584 static int resp_inquiry(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char pq_pdt; unsigned char *arr; unsigned char *cmd = scp->cmnd; u32 alloc_len, n; int ret; bool have_wlun, is_disk, is_zbc, is_disk_zbc; alloc_len = get_unaligned_be16(cmd + 3); arr = kzalloc(SDEBUG_MAX_INQ_ARR_SZ, GFP_ATOMIC); if (! arr) return DID_REQUEUE << 16; is_disk = (sdebug_ptype == TYPE_DISK); is_zbc = (devip->zmodel != BLK_ZONED_NONE); is_disk_zbc = (is_disk || is_zbc); have_wlun = scsi_is_wlun(scp->device->lun); if (have_wlun) pq_pdt = TYPE_WLUN; /* present, wlun */ else if (sdebug_no_lun_0 && (devip->lun == SDEBUG_LUN_0_VAL)) pq_pdt = 0x7f; /* not present, PQ=3, PDT=0x1f */ else pq_pdt = (sdebug_ptype & 0x1f); arr[0] = pq_pdt; if (0x2 & cmd[1]) { /* CMDDT bit set */ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 1); kfree(arr); return check_condition_result; } else if (0x1 & cmd[1]) { /* EVPD bit set */ int lu_id_num, port_group_id, target_dev_id; u32 len; char lu_id_str[6]; int host_no = devip->sdbg_host->shost->host_no; port_group_id = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f); if (sdebug_vpd_use_hostno == 0) host_no = 0; lu_id_num = have_wlun ? -1 : (((host_no + 1) * 2000) + (devip->target * 1000) + devip->lun); target_dev_id = ((host_no + 1) * 2000) + (devip->target * 1000) - 3; len = scnprintf(lu_id_str, 6, "%d", lu_id_num); if (0 == cmd[2]) { /* supported vital product data pages */ arr[1] = cmd[2]; /*sanity */ n = 4; arr[n++] = 0x0; /* this page */ arr[n++] = 0x80; /* unit serial number */ arr[n++] = 0x83; /* device identification */ arr[n++] = 0x84; /* software interface ident. */ arr[n++] = 0x85; /* management network addresses */ arr[n++] = 0x86; /* extended inquiry */ arr[n++] = 0x87; /* mode page policy */ arr[n++] = 0x88; /* SCSI ports */ if (is_disk_zbc) { /* SBC or ZBC */ arr[n++] = 0x89; /* ATA information */ arr[n++] = 0xb0; /* Block limits */ arr[n++] = 0xb1; /* Block characteristics */ if (is_disk) arr[n++] = 0xb2; /* LB Provisioning */ if (is_zbc) arr[n++] = 0xb6; /* ZB dev. char. */ } arr[3] = n - 4; /* number of supported VPD pages */ } else if (0x80 == cmd[2]) { /* unit serial number */ arr[1] = cmd[2]; /*sanity */ arr[3] = len; memcpy(&arr[4], lu_id_str, len); } else if (0x83 == cmd[2]) { /* device identification */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_83(&arr[4], port_group_id, target_dev_id, lu_id_num, lu_id_str, len, &devip->lu_name); } else if (0x84 == cmd[2]) { /* Software interface ident. */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_84(&arr[4]); } else if (0x85 == cmd[2]) { /* Management network addresses */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_85(&arr[4]); } else if (0x86 == cmd[2]) { /* extended inquiry */ arr[1] = cmd[2]; /*sanity */ arr[3] = 0x3c; /* number of following entries */ if (sdebug_dif == T10_PI_TYPE3_PROTECTION) arr[4] = 0x4; /* SPT: GRD_CHK:1 */ else if (have_dif_prot) arr[4] = 0x5; /* SPT: GRD_CHK:1, REF_CHK:1 */ else arr[4] = 0x0; /* no protection stuff */ arr[5] = 0x7; /* head of q, ordered + simple q's */ } else if (0x87 == cmd[2]) { /* mode page policy */ arr[1] = cmd[2]; /*sanity */ arr[3] = 0x8; /* number of following entries */ arr[4] = 0x2; /* disconnect-reconnect mp */ arr[6] = 0x80; /* mlus, shared */ arr[8] = 0x18; /* protocol specific lu */ arr[10] = 0x82; /* mlus, per initiator port */ } else if (0x88 == cmd[2]) { /* SCSI Ports */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_88(&arr[4], target_dev_id); } else if (is_disk_zbc && 0x89 == cmd[2]) { /* ATA info */ arr[1] = cmd[2]; /*sanity */ n = inquiry_vpd_89(&arr[4]); put_unaligned_be16(n, arr + 2); } else if (is_disk_zbc && 0xb0 == cmd[2]) { /* Block limits */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_b0(&arr[4]); } else if (is_disk_zbc && 0xb1 == cmd[2]) { /* Block char. */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_b1(devip, &arr[4]); } else if (is_disk && 0xb2 == cmd[2]) { /* LB Prov. */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_b2(&arr[4]); } else if (is_zbc && cmd[2] == 0xb6) { /* ZB dev. charact. */ arr[1] = cmd[2]; /*sanity */ arr[3] = inquiry_vpd_b6(devip, &arr[4]); } else { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); kfree(arr); return check_condition_result; } len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); ret = fill_from_dev_buffer(scp, arr, min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); kfree(arr); return ret; } /* drops through here for a standard inquiry */ arr[1] = sdebug_removable ? 0x80 : 0; /* Removable disk */ arr[2] = sdebug_scsi_level; arr[3] = 2; /* response_data_format==2 */ arr[4] = SDEBUG_LONG_INQ_SZ - 5; arr[5] = (int)have_dif_prot; /* PROTECT bit */ if (sdebug_vpd_use_hostno == 0) arr[5] |= 0x10; /* claim: implicit TPGS */ arr[6] = 0x10; /* claim: MultiP */ /* arr[6] |= 0x40; ... claim: EncServ (enclosure services) */ arr[7] = 0xa; /* claim: LINKED + CMDQUE */ memcpy(&arr[8], sdebug_inq_vendor_id, 8); memcpy(&arr[16], sdebug_inq_product_id, 16); memcpy(&arr[32], sdebug_inq_product_rev, 4); /* Use Vendor Specific area to place driver date in ASCII hex */ memcpy(&arr[36], sdebug_version_date, 8); /* version descriptors (2 bytes each) follow */ put_unaligned_be16(0xc0, arr + 58); /* SAM-6 no version claimed */ put_unaligned_be16(0x5c0, arr + 60); /* SPC-5 no version claimed */ n = 62; if (is_disk) { /* SBC-4 no version claimed */ put_unaligned_be16(0x600, arr + n); n += 2; } else if (sdebug_ptype == TYPE_TAPE) { /* SSC-4 rev 3 */ put_unaligned_be16(0x525, arr + n); n += 2; } else if (is_zbc) { /* ZBC BSR INCITS 536 revision 05 */ put_unaligned_be16(0x624, arr + n); n += 2; } put_unaligned_be16(0x2100, arr + n); /* SPL-4 no version claimed */ ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, SDEBUG_LONG_INQ_SZ)); kfree(arr); return ret; } /* See resp_iec_m_pg() for how this data is manipulated */ static unsigned char iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 0, 0, 0x0, 0x0}; static int resp_requests(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *cmd = scp->cmnd; unsigned char arr[SCSI_SENSE_BUFFERSIZE]; /* assume >= 18 bytes */ bool dsense = !!(cmd[1] & 1); u32 alloc_len = cmd[4]; u32 len = 18; int stopped_state = atomic_read(&devip->stopped); memset(arr, 0, sizeof(arr)); if (stopped_state > 0) { /* some "pollable" data [spc6r02: 5.12.2] */ if (dsense) { arr[0] = 0x72; arr[1] = NOT_READY; arr[2] = LOGICAL_UNIT_NOT_READY; arr[3] = (stopped_state == 2) ? 0x1 : 0x2; len = 8; } else { arr[0] = 0x70; arr[2] = NOT_READY; /* NO_SENSE in sense_key */ arr[7] = 0xa; /* 18 byte sense buffer */ arr[12] = LOGICAL_UNIT_NOT_READY; arr[13] = (stopped_state == 2) ? 0x1 : 0x2; } } else if ((iec_m_pg[2] & 0x4) && (6 == (iec_m_pg[3] & 0xf))) { /* Information exceptions control mode page: TEST=1, MRIE=6 */ if (dsense) { arr[0] = 0x72; arr[1] = 0x0; /* NO_SENSE in sense_key */ arr[2] = THRESHOLD_EXCEEDED; arr[3] = 0xff; /* Failure prediction(false) */ len = 8; } else { arr[0] = 0x70; arr[2] = 0x0; /* NO_SENSE in sense_key */ arr[7] = 0xa; /* 18 byte sense buffer */ arr[12] = THRESHOLD_EXCEEDED; arr[13] = 0xff; /* Failure prediction(false) */ } } else { /* nothing to report */ if (dsense) { len = 8; memset(arr, 0, len); arr[0] = 0x72; } else { memset(arr, 0, len); arr[0] = 0x70; arr[7] = 0xa; } } return fill_from_dev_buffer(scp, arr, min_t(u32, len, alloc_len)); } static int resp_start_stop(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *cmd = scp->cmnd; int power_cond, want_stop, stopped_state; bool changing; power_cond = (cmd[4] & 0xf0) >> 4; if (power_cond) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 7); return check_condition_result; } want_stop = !(cmd[4] & 1); stopped_state = atomic_read(&devip->stopped); if (stopped_state == 2) { ktime_t now_ts = ktime_get_boottime(); if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { u64 diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { /* tur_ms_to_ready timer extinguished */ atomic_set(&devip->stopped, 0); stopped_state = 0; } } if (stopped_state == 2) { if (want_stop) { stopped_state = 1; /* dummy up success */ } else { /* Disallow tur_ms_to_ready delay to be overridden */ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, 0 /* START bit */); return check_condition_result; } } } changing = (stopped_state != want_stop); if (changing) atomic_xchg(&devip->stopped, want_stop); if (!changing || (cmd[1] & 0x1)) /* state unchanged or IMMED bit set in cdb */ return SDEG_RES_IMMED_MASK; else return 0; } static sector_t get_sdebug_capacity(void) { static const unsigned int gibibyte = 1073741824; if (sdebug_virtual_gb > 0) return (sector_t)sdebug_virtual_gb * (gibibyte / sdebug_sector_size); else return sdebug_store_sectors; } #define SDEBUG_READCAP_ARR_SZ 8 static int resp_readcap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char arr[SDEBUG_READCAP_ARR_SZ]; unsigned int capac; /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); memset(arr, 0, SDEBUG_READCAP_ARR_SZ); if (sdebug_capacity < 0xffffffff) { capac = (unsigned int)sdebug_capacity - 1; put_unaligned_be32(capac, arr + 0); } else put_unaligned_be32(0xffffffff, arr + 0); put_unaligned_be16(sdebug_sector_size, arr + 6); return fill_from_dev_buffer(scp, arr, SDEBUG_READCAP_ARR_SZ); } #define SDEBUG_READCAP16_ARR_SZ 32 static int resp_readcap16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *cmd = scp->cmnd; unsigned char arr[SDEBUG_READCAP16_ARR_SZ]; u32 alloc_len; alloc_len = get_unaligned_be32(cmd + 10); /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); memset(arr, 0, SDEBUG_READCAP16_ARR_SZ); put_unaligned_be64((u64)(sdebug_capacity - 1), arr + 0); put_unaligned_be32(sdebug_sector_size, arr + 8); arr[13] = sdebug_physblk_exp & 0xf; arr[14] = (sdebug_lowest_aligned >> 8) & 0x3f; if (scsi_debug_lbp()) { arr[14] |= 0x80; /* LBPME */ /* from sbc4r07, this LBPRZ field is 1 bit, but the LBPRZ in * the LB Provisioning VPD page is 3 bits. Note that lbprz=2 * in the wider field maps to 0 in this field. */ if (sdebug_lbprz & 1) /* precisely what the draft requires */ arr[14] |= 0x40; } /* * Since the scsi_debug READ CAPACITY implementation always reports the * total disk capacity, set RC BASIS = 1 for host-managed ZBC devices. */ if (devip->zmodel == BLK_ZONED_HM) arr[12] |= 1 << 4; arr[15] = sdebug_lowest_aligned & 0xff; if (have_dif_prot) { arr[12] = (sdebug_dif - 1) << 1; /* P_TYPE */ arr[12] |= 1; /* PROT_EN */ } return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, SDEBUG_READCAP16_ARR_SZ)); } #define SDEBUG_MAX_TGTPGS_ARR_SZ 1412 static int resp_report_tgtpgs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *cmd = scp->cmnd; unsigned char *arr; int host_no = devip->sdbg_host->shost->host_no; int port_group_a, port_group_b, port_a, port_b; u32 alen, n, rlen; int ret; alen = get_unaligned_be32(cmd + 6); arr = kzalloc(SDEBUG_MAX_TGTPGS_ARR_SZ, GFP_ATOMIC); if (! arr) return DID_REQUEUE << 16; /* * EVPD page 0x88 states we have two ports, one * real and a fake port with no device connected. * So we create two port groups with one port each * and set the group with port B to unavailable. */ port_a = 0x1; /* relative port A */ port_b = 0x2; /* relative port B */ port_group_a = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f); port_group_b = (((host_no + 1) & 0x7f) << 8) + (devip->channel & 0x7f) + 0x80; /* * The asymmetric access state is cycled according to the host_id. */ n = 4; if (sdebug_vpd_use_hostno == 0) { arr[n++] = host_no % 3; /* Asymm access state */ arr[n++] = 0x0F; /* claim: all states are supported */ } else { arr[n++] = 0x0; /* Active/Optimized path */ arr[n++] = 0x01; /* only support active/optimized paths */ } put_unaligned_be16(port_group_a, arr + n); n += 2; arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Status code */ arr[n++] = 0; /* Vendor unique */ arr[n++] = 0x1; /* One port per group */ arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Reserved */ put_unaligned_be16(port_a, arr + n); n += 2; arr[n++] = 3; /* Port unavailable */ arr[n++] = 0x08; /* claim: only unavailalbe paths are supported */ put_unaligned_be16(port_group_b, arr + n); n += 2; arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Status code */ arr[n++] = 0; /* Vendor unique */ arr[n++] = 0x1; /* One port per group */ arr[n++] = 0; /* Reserved */ arr[n++] = 0; /* Reserved */ put_unaligned_be16(port_b, arr + n); n += 2; rlen = n - 4; put_unaligned_be32(rlen, arr + 0); /* * Return the smallest value of either * - The allocated length * - The constructed command length * - The maximum array size */ rlen = min(alen, n); ret = fill_from_dev_buffer(scp, arr, min_t(u32, rlen, SDEBUG_MAX_TGTPGS_ARR_SZ)); kfree(arr); return ret; } static int resp_rsup_opcodes(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { bool rctd; u8 reporting_opts, req_opcode, sdeb_i, supp; u16 req_sa, u; u32 alloc_len, a_len; int k, offset, len, errsts, count, bump, na; const struct opcode_info_t *oip; const struct opcode_info_t *r_oip; u8 *arr; u8 *cmd = scp->cmnd; rctd = !!(cmd[2] & 0x80); reporting_opts = cmd[2] & 0x7; req_opcode = cmd[3]; req_sa = get_unaligned_be16(cmd + 4); alloc_len = get_unaligned_be32(cmd + 6); if (alloc_len < 4 || alloc_len > 0xffff) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); return check_condition_result; } if (alloc_len > 8192) a_len = 8192; else a_len = alloc_len; arr = kzalloc((a_len < 256) ? 320 : a_len + 64, GFP_ATOMIC); if (NULL == arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); return check_condition_result; } switch (reporting_opts) { case 0: /* all commands */ /* count number of commands */ for (count = 0, oip = opcode_info_arr; oip->num_attached != 0xff; ++oip) { if (F_INV_OP & oip->flags) continue; count += (oip->num_attached + 1); } bump = rctd ? 20 : 8; put_unaligned_be32(count * bump, arr); for (offset = 4, oip = opcode_info_arr; oip->num_attached != 0xff && offset < a_len; ++oip) { if (F_INV_OP & oip->flags) continue; na = oip->num_attached; arr[offset] = oip->opcode; put_unaligned_be16(oip->sa, arr + offset + 2); if (rctd) arr[offset + 5] |= 0x2; if (FF_SA & oip->flags) arr[offset + 5] |= 0x1; put_unaligned_be16(oip->len_mask[0], arr + offset + 6); if (rctd) put_unaligned_be16(0xa, arr + offset + 8); r_oip = oip; for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { if (F_INV_OP & oip->flags) continue; offset += bump; arr[offset] = oip->opcode; put_unaligned_be16(oip->sa, arr + offset + 2); if (rctd) arr[offset + 5] |= 0x2; if (FF_SA & oip->flags) arr[offset + 5] |= 0x1; put_unaligned_be16(oip->len_mask[0], arr + offset + 6); if (rctd) put_unaligned_be16(0xa, arr + offset + 8); } oip = r_oip; offset += bump; } break; case 1: /* one command: opcode only */ case 2: /* one command: opcode plus service action */ case 3: /* one command: if sa==0 then opcode only else opcode+sa */ sdeb_i = opcode_ind_arr[req_opcode]; oip = &opcode_info_arr[sdeb_i]; if (F_INV_OP & oip->flags) { supp = 1; offset = 4; } else { if (1 == reporting_opts) { if (FF_SA & oip->flags) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); kfree(arr); return check_condition_result; } req_sa = 0; } else if (2 == reporting_opts && 0 == (FF_SA & oip->flags)) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 4, -1); kfree(arr); /* point at requested sa */ return check_condition_result; } if (0 == (FF_SA & oip->flags) && req_opcode == oip->opcode) supp = 3; else if (0 == (FF_SA & oip->flags)) { na = oip->num_attached; for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { if (req_opcode == oip->opcode) break; } supp = (k >= na) ? 1 : 3; } else if (req_sa != oip->sa) { na = oip->num_attached; for (k = 0, oip = oip->arrp; k < na; ++k, ++oip) { if (req_sa == oip->sa) break; } supp = (k >= na) ? 1 : 3; } else supp = 3; if (3 == supp) { u = oip->len_mask[0]; put_unaligned_be16(u, arr + 2); arr[4] = oip->opcode; for (k = 1; k < u; ++k) arr[4 + k] = (k < 16) ? oip->len_mask[k] : 0xff; offset = 4 + u; } else offset = 4; } arr[1] = (rctd ? 0x80 : 0) | supp; if (rctd) { put_unaligned_be16(0xa, arr + offset); offset += 12; } break; default: mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); kfree(arr); return check_condition_result; } offset = (offset < a_len) ? offset : a_len; len = (offset < alloc_len) ? offset : alloc_len; errsts = fill_from_dev_buffer(scp, arr, len); kfree(arr); return errsts; } static int resp_rsup_tmfs(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { bool repd; u32 alloc_len, len; u8 arr[16]; u8 *cmd = scp->cmnd; memset(arr, 0, sizeof(arr)); repd = !!(cmd[2] & 0x80); alloc_len = get_unaligned_be32(cmd + 6); if (alloc_len < 4) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); return check_condition_result; } arr[0] = 0xc8; /* ATS | ATSS | LURS */ arr[1] = 0x1; /* ITNRS */ if (repd) { arr[3] = 0xc; len = 16; } else len = 4; len = (len < alloc_len) ? len : alloc_len; return fill_from_dev_buffer(scp, arr, len); } /* <<Following mode page info copied from ST318451LW>> */ static int resp_err_recov_pg(unsigned char *p, int pcontrol, int target) { /* Read-Write Error Recovery page for mode_sense */ unsigned char err_recov_pg[] = {0x1, 0xa, 0xc0, 11, 240, 0, 0, 0, 5, 0, 0xff, 0xff}; memcpy(p, err_recov_pg, sizeof(err_recov_pg)); if (1 == pcontrol) memset(p + 2, 0, sizeof(err_recov_pg) - 2); return sizeof(err_recov_pg); } static int resp_disconnect_pg(unsigned char *p, int pcontrol, int target) { /* Disconnect-Reconnect page for mode_sense */ unsigned char disconnect_pg[] = {0x2, 0xe, 128, 128, 0, 10, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; memcpy(p, disconnect_pg, sizeof(disconnect_pg)); if (1 == pcontrol) memset(p + 2, 0, sizeof(disconnect_pg) - 2); return sizeof(disconnect_pg); } static int resp_format_pg(unsigned char *p, int pcontrol, int target) { /* Format device page for mode_sense */ unsigned char format_pg[] = {0x3, 0x16, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0x40, 0, 0, 0}; memcpy(p, format_pg, sizeof(format_pg)); put_unaligned_be16(sdebug_sectors_per, p + 10); put_unaligned_be16(sdebug_sector_size, p + 12); if (sdebug_removable) p[20] |= 0x20; /* should agree with INQUIRY */ if (1 == pcontrol) memset(p + 2, 0, sizeof(format_pg) - 2); return sizeof(format_pg); } static unsigned char caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; static int resp_caching_pg(unsigned char *p, int pcontrol, int target) { /* Caching page for mode_sense */ unsigned char ch_caching_pg[] = {/* 0x8, 18, */ 0x4, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0}; unsigned char d_caching_pg[] = {0x8, 18, 0x14, 0, 0xff, 0xff, 0, 0, 0xff, 0xff, 0xff, 0xff, 0x80, 0x14, 0, 0, 0, 0, 0, 0}; if (SDEBUG_OPT_N_WCE & sdebug_opts) caching_pg[2] &= ~0x4; /* set WCE=0 (default WCE=1) */ memcpy(p, caching_pg, sizeof(caching_pg)); if (1 == pcontrol) memcpy(p + 2, ch_caching_pg, sizeof(ch_caching_pg)); else if (2 == pcontrol) memcpy(p, d_caching_pg, sizeof(d_caching_pg)); return sizeof(caching_pg); } static unsigned char ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 0, 0, 0x2, 0x4b}; static int resp_ctrl_m_pg(unsigned char *p, int pcontrol, int target) { /* Control mode page for mode_sense */ unsigned char ch_ctrl_m_pg[] = {/* 0xa, 10, */ 0x6, 0, 0, 0, 0, 0, 0, 0, 0, 0}; unsigned char d_ctrl_m_pg[] = {0xa, 10, 2, 0, 0, 0, 0, 0, 0, 0, 0x2, 0x4b}; if (sdebug_dsense) ctrl_m_pg[2] |= 0x4; else ctrl_m_pg[2] &= ~0x4; if (sdebug_ato) ctrl_m_pg[5] |= 0x80; /* ATO=1 */ memcpy(p, ctrl_m_pg, sizeof(ctrl_m_pg)); if (1 == pcontrol) memcpy(p + 2, ch_ctrl_m_pg, sizeof(ch_ctrl_m_pg)); else if (2 == pcontrol) memcpy(p, d_ctrl_m_pg, sizeof(d_ctrl_m_pg)); return sizeof(ctrl_m_pg); } static int resp_iec_m_pg(unsigned char *p, int pcontrol, int target) { /* Informational Exceptions control mode page for mode_sense */ unsigned char ch_iec_m_pg[] = {/* 0x1c, 0xa, */ 0x4, 0xf, 0, 0, 0, 0, 0, 0, 0x0, 0x0}; unsigned char d_iec_m_pg[] = {0x1c, 0xa, 0x08, 0, 0, 0, 0, 0, 0, 0, 0x0, 0x0}; memcpy(p, iec_m_pg, sizeof(iec_m_pg)); if (1 == pcontrol) memcpy(p + 2, ch_iec_m_pg, sizeof(ch_iec_m_pg)); else if (2 == pcontrol) memcpy(p, d_iec_m_pg, sizeof(d_iec_m_pg)); return sizeof(iec_m_pg); } static int resp_sas_sf_m_pg(unsigned char *p, int pcontrol, int target) { /* SAS SSP mode page - short format for mode_sense */ unsigned char sas_sf_m_pg[] = {0x19, 0x6, 0x6, 0x0, 0x7, 0xd0, 0x0, 0x0}; memcpy(p, sas_sf_m_pg, sizeof(sas_sf_m_pg)); if (1 == pcontrol) memset(p + 2, 0, sizeof(sas_sf_m_pg) - 2); return sizeof(sas_sf_m_pg); } static int resp_sas_pcd_m_spg(unsigned char *p, int pcontrol, int target, int target_dev_id) { /* SAS phy control and discover mode page for mode_sense */ unsigned char sas_pcd_m_pg[] = {0x59, 0x1, 0, 0x64, 0, 0x6, 0, 2, 0, 0, 0, 0, 0x10, 0x9, 0x8, 0x0, 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 0x2, 0, 0, 0, 0, 0, 0, 0, 0x88, 0x99, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0x10, 0x9, 0x8, 0x0, 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 0, 0, 0, 0, 0, 0, 0, 0, /* insert SAS addr */ 0x3, 0, 0, 0, 0, 0, 0, 0, 0x88, 0x99, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; int port_a, port_b; put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 16); put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 24); put_unaligned_be64(naa3_comp_a, sas_pcd_m_pg + 64); put_unaligned_be64(naa3_comp_c + 1, sas_pcd_m_pg + 72); port_a = target_dev_id + 1; port_b = port_a + 1; memcpy(p, sas_pcd_m_pg, sizeof(sas_pcd_m_pg)); put_unaligned_be32(port_a, p + 20); put_unaligned_be32(port_b, p + 48 + 20); if (1 == pcontrol) memset(p + 4, 0, sizeof(sas_pcd_m_pg) - 4); return sizeof(sas_pcd_m_pg); } static int resp_sas_sha_m_spg(unsigned char *p, int pcontrol) { /* SAS SSP shared protocol specific port mode subpage */ unsigned char sas_sha_m_pg[] = {0x59, 0x2, 0, 0xc, 0, 0x6, 0x10, 0, 0, 0, 0, 0, 0, 0, 0, 0, }; memcpy(p, sas_sha_m_pg, sizeof(sas_sha_m_pg)); if (1 == pcontrol) memset(p + 4, 0, sizeof(sas_sha_m_pg) - 4); return sizeof(sas_sha_m_pg); } #define SDEBUG_MAX_MSENSE_SZ 256 static int resp_mode_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int pcontrol, pcode, subpcode, bd_len; unsigned char dev_spec; u32 alloc_len, offset, len; int target_dev_id; int target = scp->device->id; unsigned char *ap; unsigned char arr[SDEBUG_MAX_MSENSE_SZ]; unsigned char *cmd = scp->cmnd; bool dbd, llbaa, msense_6, is_disk, is_zbc, bad_pcode; dbd = !!(cmd[1] & 0x8); /* disable block descriptors */ pcontrol = (cmd[2] & 0xc0) >> 6; pcode = cmd[2] & 0x3f; subpcode = cmd[3]; msense_6 = (MODE_SENSE == cmd[0]); llbaa = msense_6 ? false : !!(cmd[1] & 0x10); is_disk = (sdebug_ptype == TYPE_DISK); is_zbc = (devip->zmodel != BLK_ZONED_NONE); if ((is_disk || is_zbc) && !dbd) bd_len = llbaa ? 16 : 8; else bd_len = 0; alloc_len = msense_6 ? cmd[4] : get_unaligned_be16(cmd + 7); memset(arr, 0, SDEBUG_MAX_MSENSE_SZ); if (0x3 == pcontrol) { /* Saving values not supported */ mk_sense_buffer(scp, ILLEGAL_REQUEST, SAVING_PARAMS_UNSUP, 0); return check_condition_result; } target_dev_id = ((devip->sdbg_host->shost->host_no + 1) * 2000) + (devip->target * 1000) - 3; /* for disks+zbc set DPOFUA bit and clear write protect (WP) bit */ if (is_disk || is_zbc) { dev_spec = 0x10; /* =0x90 if WP=1 implies read-only */ if (sdebug_wp) dev_spec |= 0x80; } else dev_spec = 0x0; if (msense_6) { arr[2] = dev_spec; arr[3] = bd_len; offset = 4; } else { arr[3] = dev_spec; if (16 == bd_len) arr[4] = 0x1; /* set LONGLBA bit */ arr[7] = bd_len; /* assume 255 or less */ offset = 8; } ap = arr + offset; if ((bd_len > 0) && (!sdebug_capacity)) sdebug_capacity = get_sdebug_capacity(); if (8 == bd_len) { if (sdebug_capacity > 0xfffffffe) put_unaligned_be32(0xffffffff, ap + 0); else put_unaligned_be32(sdebug_capacity, ap + 0); put_unaligned_be16(sdebug_sector_size, ap + 6); offset += bd_len; ap = arr + offset; } else if (16 == bd_len) { put_unaligned_be64((u64)sdebug_capacity, ap + 0); put_unaligned_be32(sdebug_sector_size, ap + 12); offset += bd_len; ap = arr + offset; } if ((subpcode > 0x0) && (subpcode < 0xff) && (0x19 != pcode)) { /* TODO: Control Extension page */ mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); return check_condition_result; } bad_pcode = false; switch (pcode) { case 0x1: /* Read-Write error recovery page, direct access */ len = resp_err_recov_pg(ap, pcontrol, target); offset += len; break; case 0x2: /* Disconnect-Reconnect page, all devices */ len = resp_disconnect_pg(ap, pcontrol, target); offset += len; break; case 0x3: /* Format device page, direct access */ if (is_disk) { len = resp_format_pg(ap, pcontrol, target); offset += len; } else bad_pcode = true; break; case 0x8: /* Caching page, direct access */ if (is_disk || is_zbc) { len = resp_caching_pg(ap, pcontrol, target); offset += len; } else bad_pcode = true; break; case 0xa: /* Control Mode page, all devices */ len = resp_ctrl_m_pg(ap, pcontrol, target); offset += len; break; case 0x19: /* if spc==1 then sas phy, control+discover */ if ((subpcode > 0x2) && (subpcode < 0xff)) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); return check_condition_result; } len = 0; if ((0x0 == subpcode) || (0xff == subpcode)) len += resp_sas_sf_m_pg(ap + len, pcontrol, target); if ((0x1 == subpcode) || (0xff == subpcode)) len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, target_dev_id); if ((0x2 == subpcode) || (0xff == subpcode)) len += resp_sas_sha_m_spg(ap + len, pcontrol); offset += len; break; case 0x1c: /* Informational Exceptions Mode page, all devices */ len = resp_iec_m_pg(ap, pcontrol, target); offset += len; break; case 0x3f: /* Read all Mode pages */ if ((0 == subpcode) || (0xff == subpcode)) { len = resp_err_recov_pg(ap, pcontrol, target); len += resp_disconnect_pg(ap + len, pcontrol, target); if (is_disk) { len += resp_format_pg(ap + len, pcontrol, target); len += resp_caching_pg(ap + len, pcontrol, target); } else if (is_zbc) { len += resp_caching_pg(ap + len, pcontrol, target); } len += resp_ctrl_m_pg(ap + len, pcontrol, target); len += resp_sas_sf_m_pg(ap + len, pcontrol, target); if (0xff == subpcode) { len += resp_sas_pcd_m_spg(ap + len, pcontrol, target, target_dev_id); len += resp_sas_sha_m_spg(ap + len, pcontrol); } len += resp_iec_m_pg(ap + len, pcontrol, target); offset += len; } else { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); return check_condition_result; } break; default: bad_pcode = true; break; } if (bad_pcode) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); return check_condition_result; } if (msense_6) arr[0] = offset - 1; else put_unaligned_be16((offset - 2), arr + 0); return fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, offset)); } #define SDEBUG_MAX_MSELECT_SZ 512 static int resp_mode_select(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int pf, sp, ps, md_len, bd_len, off, spf, pg_len; int param_len, res, mpage; unsigned char arr[SDEBUG_MAX_MSELECT_SZ]; unsigned char *cmd = scp->cmnd; int mselect6 = (MODE_SELECT == cmd[0]); memset(arr, 0, sizeof(arr)); pf = cmd[1] & 0x10; sp = cmd[1] & 0x1; param_len = mselect6 ? cmd[4] : get_unaligned_be16(cmd + 7); if ((0 == pf) || sp || (param_len > SDEBUG_MAX_MSELECT_SZ)) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, mselect6 ? 4 : 7, -1); return check_condition_result; } res = fetch_to_dev_buffer(scp, arr, param_len); if (-1 == res) return DID_ERROR << 16; else if (sdebug_verbose && (res < param_len)) sdev_printk(KERN_INFO, scp->device, "%s: cdb indicated=%d, IO sent=%d bytes\n", __func__, param_len, res); md_len = mselect6 ? (arr[0] + 1) : (get_unaligned_be16(arr + 0) + 2); bd_len = mselect6 ? arr[3] : get_unaligned_be16(arr + 6); off = bd_len + (mselect6 ? 4 : 8); if (md_len > 2 || off >= res) { mk_sense_invalid_fld(scp, SDEB_IN_DATA, 0, -1); return check_condition_result; } mpage = arr[off] & 0x3f; ps = !!(arr[off] & 0x80); if (ps) { mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 7); return check_condition_result; } spf = !!(arr[off] & 0x40); pg_len = spf ? (get_unaligned_be16(arr + off + 2) + 4) : (arr[off + 1] + 2); if ((pg_len + off) > param_len) { mk_sense_buffer(scp, ILLEGAL_REQUEST, PARAMETER_LIST_LENGTH_ERR, 0); return check_condition_result; } switch (mpage) { case 0x8: /* Caching Mode page */ if (caching_pg[1] == arr[off + 1]) { memcpy(caching_pg + 2, arr + off + 2, sizeof(caching_pg) - 2); goto set_mode_changed_ua; } break; case 0xa: /* Control Mode page */ if (ctrl_m_pg[1] == arr[off + 1]) { memcpy(ctrl_m_pg + 2, arr + off + 2, sizeof(ctrl_m_pg) - 2); if (ctrl_m_pg[4] & 0x8) sdebug_wp = true; else sdebug_wp = false; sdebug_dsense = !!(ctrl_m_pg[2] & 0x4); goto set_mode_changed_ua; } break; case 0x1c: /* Informational Exceptions Mode page */ if (iec_m_pg[1] == arr[off + 1]) { memcpy(iec_m_pg + 2, arr + off + 2, sizeof(iec_m_pg) - 2); goto set_mode_changed_ua; } break; default: break; } mk_sense_invalid_fld(scp, SDEB_IN_DATA, off, 5); return check_condition_result; set_mode_changed_ua: set_bit(SDEBUG_UA_MODE_CHANGED, devip->uas_bm); return 0; } static int resp_temp_l_pg(unsigned char *arr) { unsigned char temp_l_pg[] = {0x0, 0x0, 0x3, 0x2, 0x0, 38, 0x0, 0x1, 0x3, 0x2, 0x0, 65, }; memcpy(arr, temp_l_pg, sizeof(temp_l_pg)); return sizeof(temp_l_pg); } static int resp_ie_l_pg(unsigned char *arr) { unsigned char ie_l_pg[] = {0x0, 0x0, 0x3, 0x3, 0x0, 0x0, 38, }; memcpy(arr, ie_l_pg, sizeof(ie_l_pg)); if (iec_m_pg[2] & 0x4) { /* TEST bit set */ arr[4] = THRESHOLD_EXCEEDED; arr[5] = 0xff; } return sizeof(ie_l_pg); } static int resp_env_rep_l_spg(unsigned char *arr) { unsigned char env_rep_l_spg[] = {0x0, 0x0, 0x23, 0x8, 0x0, 40, 72, 0xff, 45, 18, 0, 0, 0x1, 0x0, 0x23, 0x8, 0x0, 55, 72, 35, 55, 45, 0, 0, }; memcpy(arr, env_rep_l_spg, sizeof(env_rep_l_spg)); return sizeof(env_rep_l_spg); } #define SDEBUG_MAX_LSENSE_SZ 512 static int resp_log_sense(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int ppc, sp, pcode, subpcode; u32 alloc_len, len, n; unsigned char arr[SDEBUG_MAX_LSENSE_SZ]; unsigned char *cmd = scp->cmnd; memset(arr, 0, sizeof(arr)); ppc = cmd[1] & 0x2; sp = cmd[1] & 0x1; if (ppc || sp) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, ppc ? 1 : 0); return check_condition_result; } pcode = cmd[2] & 0x3f; subpcode = cmd[3] & 0xff; alloc_len = get_unaligned_be16(cmd + 7); arr[0] = pcode; if (0 == subpcode) { switch (pcode) { case 0x0: /* Supported log pages log page */ n = 4; arr[n++] = 0x0; /* this page */ arr[n++] = 0xd; /* Temperature */ arr[n++] = 0x2f; /* Informational exceptions */ arr[3] = n - 4; break; case 0xd: /* Temperature log page */ arr[3] = resp_temp_l_pg(arr + 4); break; case 0x2f: /* Informational exceptions log page */ arr[3] = resp_ie_l_pg(arr + 4); break; default: mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); return check_condition_result; } } else if (0xff == subpcode) { arr[0] |= 0x40; arr[1] = subpcode; switch (pcode) { case 0x0: /* Supported log pages and subpages log page */ n = 4; arr[n++] = 0x0; arr[n++] = 0x0; /* 0,0 page */ arr[n++] = 0x0; arr[n++] = 0xff; /* this page */ arr[n++] = 0xd; arr[n++] = 0x0; /* Temperature */ arr[n++] = 0xd; arr[n++] = 0x1; /* Environment reporting */ arr[n++] = 0xd; arr[n++] = 0xff; /* all 0xd subpages */ arr[n++] = 0x2f; arr[n++] = 0x0; /* Informational exceptions */ arr[n++] = 0x2f; arr[n++] = 0xff; /* all 0x2f subpages */ arr[3] = n - 4; break; case 0xd: /* Temperature subpages */ n = 4; arr[n++] = 0xd; arr[n++] = 0x0; /* Temperature */ arr[n++] = 0xd; arr[n++] = 0x1; /* Environment reporting */ arr[n++] = 0xd; arr[n++] = 0xff; /* these subpages */ arr[3] = n - 4; break; case 0x2f: /* Informational exceptions subpages */ n = 4; arr[n++] = 0x2f; arr[n++] = 0x0; /* Informational exceptions */ arr[n++] = 0x2f; arr[n++] = 0xff; /* these subpages */ arr[3] = n - 4; break; default: mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); return check_condition_result; } } else if (subpcode > 0) { arr[0] |= 0x40; arr[1] = subpcode; if (pcode == 0xd && subpcode == 1) arr[3] = resp_env_rep_l_spg(arr + 4); else { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 5); return check_condition_result; } } else { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 3, -1); return check_condition_result; } len = min_t(u32, get_unaligned_be16(arr + 2) + 4, alloc_len); return fill_from_dev_buffer(scp, arr, min_t(u32, len, SDEBUG_MAX_INQ_ARR_SZ)); } static inline bool sdebug_dev_is_zoned(struct sdebug_dev_info *devip) { return devip->nr_zones != 0; } static struct sdeb_zone_state *zbc_zone(struct sdebug_dev_info *devip, unsigned long long lba) { u32 zno = lba >> devip->zsize_shift; struct sdeb_zone_state *zsp; if (devip->zcap == devip->zsize || zno < devip->nr_conv_zones) return &devip->zstate[zno]; /* * If the zone capacity is less than the zone size, adjust for gap * zones. */ zno = 2 * zno - devip->nr_conv_zones; WARN_ONCE(zno >= devip->nr_zones, "%u > %u\n", zno, devip->nr_zones); zsp = &devip->zstate[zno]; if (lba >= zsp->z_start + zsp->z_size) zsp++; WARN_ON_ONCE(lba >= zsp->z_start + zsp->z_size); return zsp; } static inline bool zbc_zone_is_conv(struct sdeb_zone_state *zsp) { return zsp->z_type == ZBC_ZTYPE_CNV; } static inline bool zbc_zone_is_gap(struct sdeb_zone_state *zsp) { return zsp->z_type == ZBC_ZTYPE_GAP; } static inline bool zbc_zone_is_seq(struct sdeb_zone_state *zsp) { return !zbc_zone_is_conv(zsp) && !zbc_zone_is_gap(zsp); } static void zbc_close_zone(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp) { enum sdebug_z_cond zc; if (!zbc_zone_is_seq(zsp)) return; zc = zsp->z_cond; if (!(zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN)) return; if (zc == ZC2_IMPLICIT_OPEN) devip->nr_imp_open--; else devip->nr_exp_open--; if (zsp->z_wp == zsp->z_start) { zsp->z_cond = ZC1_EMPTY; } else { zsp->z_cond = ZC4_CLOSED; devip->nr_closed++; } } static void zbc_close_imp_open_zone(struct sdebug_dev_info *devip) { struct sdeb_zone_state *zsp = &devip->zstate[0]; unsigned int i; for (i = 0; i < devip->nr_zones; i++, zsp++) { if (zsp->z_cond == ZC2_IMPLICIT_OPEN) { zbc_close_zone(devip, zsp); return; } } } static void zbc_open_zone(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp, bool explicit) { enum sdebug_z_cond zc; if (!zbc_zone_is_seq(zsp)) return; zc = zsp->z_cond; if ((explicit && zc == ZC3_EXPLICIT_OPEN) || (!explicit && zc == ZC2_IMPLICIT_OPEN)) return; /* Close an implicit open zone if necessary */ if (explicit && zsp->z_cond == ZC2_IMPLICIT_OPEN) zbc_close_zone(devip, zsp); else if (devip->max_open && devip->nr_imp_open + devip->nr_exp_open >= devip->max_open) zbc_close_imp_open_zone(devip); if (zsp->z_cond == ZC4_CLOSED) devip->nr_closed--; if (explicit) { zsp->z_cond = ZC3_EXPLICIT_OPEN; devip->nr_exp_open++; } else { zsp->z_cond = ZC2_IMPLICIT_OPEN; devip->nr_imp_open++; } } static inline void zbc_set_zone_full(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp) { switch (zsp->z_cond) { case ZC2_IMPLICIT_OPEN: devip->nr_imp_open--; break; case ZC3_EXPLICIT_OPEN: devip->nr_exp_open--; break; default: WARN_ONCE(true, "Invalid zone %llu condition %x\n", zsp->z_start, zsp->z_cond); break; } zsp->z_cond = ZC5_FULL; } static void zbc_inc_wp(struct sdebug_dev_info *devip, unsigned long long lba, unsigned int num) { struct sdeb_zone_state *zsp = zbc_zone(devip, lba); unsigned long long n, end, zend = zsp->z_start + zsp->z_size; if (!zbc_zone_is_seq(zsp)) return; if (zsp->z_type == ZBC_ZTYPE_SWR) { zsp->z_wp += num; if (zsp->z_wp >= zend) zbc_set_zone_full(devip, zsp); return; } while (num) { if (lba != zsp->z_wp) zsp->z_non_seq_resource = true; end = lba + num; if (end >= zend) { n = zend - lba; zsp->z_wp = zend; } else if (end > zsp->z_wp) { n = num; zsp->z_wp = end; } else { n = num; } if (zsp->z_wp >= zend) zbc_set_zone_full(devip, zsp); num -= n; lba += n; if (num) { zsp++; zend = zsp->z_start + zsp->z_size; } } } static int check_zbc_access_params(struct scsi_cmnd *scp, unsigned long long lba, unsigned int num, bool write) { struct scsi_device *sdp = scp->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdeb_zone_state *zsp = zbc_zone(devip, lba); struct sdeb_zone_state *zsp_end = zbc_zone(devip, lba + num - 1); if (!write) { if (devip->zmodel == BLK_ZONED_HA) return 0; /* For host-managed, reads cannot cross zone types boundaries */ if (zsp->z_type != zsp_end->z_type) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, READ_INVDATA_ASCQ); return check_condition_result; } return 0; } /* Writing into a gap zone is not allowed */ if (zbc_zone_is_gap(zsp)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, ATTEMPT_ACCESS_GAP); return check_condition_result; } /* No restrictions for writes within conventional zones */ if (zbc_zone_is_conv(zsp)) { if (!zbc_zone_is_conv(zsp_end)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, WRITE_BOUNDARY_ASCQ); return check_condition_result; } return 0; } if (zsp->z_type == ZBC_ZTYPE_SWR) { /* Writes cannot cross sequential zone boundaries */ if (zsp_end != zsp) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, WRITE_BOUNDARY_ASCQ); return check_condition_result; } /* Cannot write full zones */ if (zsp->z_cond == ZC5_FULL) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } /* Writes must be aligned to the zone WP */ if (lba != zsp->z_wp) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, UNALIGNED_WRITE_ASCQ); return check_condition_result; } } /* Handle implicit open of closed and empty zones */ if (zsp->z_cond == ZC1_EMPTY || zsp->z_cond == ZC4_CLOSED) { if (devip->max_open && devip->nr_exp_open >= devip->max_open) { mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, INSUFF_ZONE_ASCQ); return check_condition_result; } zbc_open_zone(devip, zsp, false); } return 0; } static inline int check_device_access_params (struct scsi_cmnd *scp, unsigned long long lba, unsigned int num, bool write) { struct scsi_device *sdp = scp->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; if (lba + num > sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); return check_condition_result; } /* transfer length excessive (tie in to block limits VPD page) */ if (num > sdebug_store_sectors) { /* needs work to find which cdb byte 'num' comes from */ mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return check_condition_result; } if (write && unlikely(sdebug_wp)) { mk_sense_buffer(scp, DATA_PROTECT, WRITE_PROTECTED, 0x2); return check_condition_result; } if (sdebug_dev_is_zoned(devip)) return check_zbc_access_params(scp, lba, num, write); return 0; } /* * Note: if BUG_ON() fires it usually indicates a problem with the parser * tables. Perhaps a missing F_FAKE_RW or FF_MEDIA_IO flag. Response functions * that access any of the "stores" in struct sdeb_store_info should call this * function with bug_if_fake_rw set to true. */ static inline struct sdeb_store_info *devip2sip(struct sdebug_dev_info *devip, bool bug_if_fake_rw) { if (sdebug_fake_rw) { BUG_ON(bug_if_fake_rw); /* See note above */ return NULL; } return xa_load(per_store_ap, devip->sdbg_host->si_idx); } /* Returns number of bytes copied or -1 if error. */ static int do_device_access(struct sdeb_store_info *sip, struct scsi_cmnd *scp, u32 sg_skip, u64 lba, u32 num, bool do_write) { int ret; u64 block, rest = 0; enum dma_data_direction dir; struct scsi_data_buffer *sdb = &scp->sdb; u8 *fsp; if (do_write) { dir = DMA_TO_DEVICE; write_since_sync = true; } else { dir = DMA_FROM_DEVICE; } if (!sdb->length || !sip) return 0; if (scp->sc_data_direction != dir) return -1; fsp = sip->storep; block = do_div(lba, sdebug_store_sectors); if (block + num > sdebug_store_sectors) rest = block + num - sdebug_store_sectors; ret = sg_copy_buffer(sdb->table.sgl, sdb->table.nents, fsp + (block * sdebug_sector_size), (num - rest) * sdebug_sector_size, sg_skip, do_write); if (ret != (num - rest) * sdebug_sector_size) return ret; if (rest) { ret += sg_copy_buffer(sdb->table.sgl, sdb->table.nents, fsp, rest * sdebug_sector_size, sg_skip + ((num - rest) * sdebug_sector_size), do_write); } return ret; } /* Returns number of bytes copied or -1 if error. */ static int do_dout_fetch(struct scsi_cmnd *scp, u32 num, u8 *doutp) { struct scsi_data_buffer *sdb = &scp->sdb; if (!sdb->length) return 0; if (scp->sc_data_direction != DMA_TO_DEVICE) return -1; return sg_copy_buffer(sdb->table.sgl, sdb->table.nents, doutp, num * sdebug_sector_size, 0, true); } /* If sip->storep+lba compares equal to arr(num), then copy top half of * arr into sip->storep+lba and return true. If comparison fails then * return false. */ static bool comp_write_worker(struct sdeb_store_info *sip, u64 lba, u32 num, const u8 *arr, bool compare_only) { bool res; u64 block, rest = 0; u32 store_blks = sdebug_store_sectors; u32 lb_size = sdebug_sector_size; u8 *fsp = sip->storep; block = do_div(lba, store_blks); if (block + num > store_blks) rest = block + num - store_blks; res = !memcmp(fsp + (block * lb_size), arr, (num - rest) * lb_size); if (!res) return res; if (rest) res = memcmp(fsp, arr + ((num - rest) * lb_size), rest * lb_size); if (!res) return res; if (compare_only) return true; arr += num * lb_size; memcpy(fsp + (block * lb_size), arr, (num - rest) * lb_size); if (rest) memcpy(fsp, arr + ((num - rest) * lb_size), rest * lb_size); return res; } static __be16 dif_compute_csum(const void *buf, int len) { __be16 csum; if (sdebug_guard) csum = (__force __be16)ip_compute_csum(buf, len); else csum = cpu_to_be16(crc_t10dif(buf, len)); return csum; } static int dif_verify(struct t10_pi_tuple *sdt, const void *data, sector_t sector, u32 ei_lba) { __be16 csum = dif_compute_csum(data, sdebug_sector_size); if (sdt->guard_tag != csum) { pr_err("GUARD check failed on sector %lu rcvd 0x%04x, data 0x%04x\n", (unsigned long)sector, be16_to_cpu(sdt->guard_tag), be16_to_cpu(csum)); return 0x01; } if (sdebug_dif == T10_PI_TYPE1_PROTECTION && be32_to_cpu(sdt->ref_tag) != (sector & 0xffffffff)) { pr_err("REF check failed on sector %lu\n", (unsigned long)sector); return 0x03; } if (sdebug_dif == T10_PI_TYPE2_PROTECTION && be32_to_cpu(sdt->ref_tag) != ei_lba) { pr_err("REF check failed on sector %lu\n", (unsigned long)sector); return 0x03; } return 0; } static void dif_copy_prot(struct scsi_cmnd *scp, sector_t sector, unsigned int sectors, bool read) { size_t resid; void *paddr; struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) scp->device->hostdata, true); struct t10_pi_tuple *dif_storep = sip->dif_storep; const void *dif_store_end = dif_storep + sdebug_store_sectors; struct sg_mapping_iter miter; /* Bytes of protection data to copy into sgl */ resid = sectors * sizeof(*dif_storep); sg_miter_start(&miter, scsi_prot_sglist(scp), scsi_prot_sg_count(scp), SG_MITER_ATOMIC | (read ? SG_MITER_TO_SG : SG_MITER_FROM_SG)); while (sg_miter_next(&miter) && resid > 0) { size_t len = min_t(size_t, miter.length, resid); void *start = dif_store(sip, sector); size_t rest = 0; if (dif_store_end < start + len) rest = start + len - dif_store_end; paddr = miter.addr; if (read) memcpy(paddr, start, len - rest); else memcpy(start, paddr, len - rest); if (rest) { if (read) memcpy(paddr + len - rest, dif_storep, rest); else memcpy(dif_storep, paddr + len - rest, rest); } sector += len / sizeof(*dif_storep); resid -= len; } sg_miter_stop(&miter); } static int prot_verify_read(struct scsi_cmnd *scp, sector_t start_sec, unsigned int sectors, u32 ei_lba) { int ret = 0; unsigned int i; sector_t sector; struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) scp->device->hostdata, true); struct t10_pi_tuple *sdt; for (i = 0; i < sectors; i++, ei_lba++) { sector = start_sec + i; sdt = dif_store(sip, sector); if (sdt->app_tag == cpu_to_be16(0xffff)) continue; /* * Because scsi_debug acts as both initiator and * target we proceed to verify the PI even if * RDPROTECT=3. This is done so the "initiator" knows * which type of error to return. Otherwise we would * have to iterate over the PI twice. */ if (scp->cmnd[1] >> 5) { /* RDPROTECT */ ret = dif_verify(sdt, lba2fake_store(sip, sector), sector, ei_lba); if (ret) { dif_errors++; break; } } } dif_copy_prot(scp, start_sec, sectors, true); dix_reads++; return ret; } static inline void sdeb_read_lock(struct sdeb_store_info *sip) { if (sdebug_no_rwlock) { if (sip) __acquire(&sip->macc_lck); else __acquire(&sdeb_fake_rw_lck); } else { if (sip) read_lock(&sip->macc_lck); else read_lock(&sdeb_fake_rw_lck); } } static inline void sdeb_read_unlock(struct sdeb_store_info *sip) { if (sdebug_no_rwlock) { if (sip) __release(&sip->macc_lck); else __release(&sdeb_fake_rw_lck); } else { if (sip) read_unlock(&sip->macc_lck); else read_unlock(&sdeb_fake_rw_lck); } } static inline void sdeb_write_lock(struct sdeb_store_info *sip) { if (sdebug_no_rwlock) { if (sip) __acquire(&sip->macc_lck); else __acquire(&sdeb_fake_rw_lck); } else { if (sip) write_lock(&sip->macc_lck); else write_lock(&sdeb_fake_rw_lck); } } static inline void sdeb_write_unlock(struct sdeb_store_info *sip) { if (sdebug_no_rwlock) { if (sip) __release(&sip->macc_lck); else __release(&sdeb_fake_rw_lck); } else { if (sip) write_unlock(&sip->macc_lck); else write_unlock(&sdeb_fake_rw_lck); } } static int resp_read_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { bool check_prot; u32 num; u32 ei_lba; int ret; u64 lba; struct sdeb_store_info *sip = devip2sip(devip, true); u8 *cmd = scp->cmnd; switch (cmd[0]) { case READ_16: ei_lba = 0; lba = get_unaligned_be64(cmd + 2); num = get_unaligned_be32(cmd + 10); check_prot = true; break; case READ_10: ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be16(cmd + 7); check_prot = true; break; case READ_6: ei_lba = 0; lba = (u32)cmd[3] | (u32)cmd[2] << 8 | (u32)(cmd[1] & 0x1f) << 16; num = (0 == cmd[4]) ? 256 : cmd[4]; check_prot = true; break; case READ_12: ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be32(cmd + 6); check_prot = true; break; case XDWRITEREAD_10: ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be16(cmd + 7); check_prot = false; break; default: /* assume READ(32) */ lba = get_unaligned_be64(cmd + 12); ei_lba = get_unaligned_be32(cmd + 20); num = get_unaligned_be32(cmd + 28); check_prot = false; break; } if (unlikely(have_dif_prot && check_prot)) { if (sdebug_dif == T10_PI_TYPE2_PROTECTION && (cmd[1] & 0xe0)) { mk_sense_invalid_opcode(scp); return check_condition_result; } if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || sdebug_dif == T10_PI_TYPE3_PROTECTION) && (cmd[1] & 0xe0) == 0) sdev_printk(KERN_ERR, scp->device, "Unprotected RD " "to DIF device\n"); } if (unlikely((sdebug_opts & SDEBUG_OPT_SHORT_TRANSFER) && atomic_read(&sdeb_inject_pending))) { num /= 2; atomic_set(&sdeb_inject_pending, 0); } ret = check_device_access_params(scp, lba, num, false); if (ret) return ret; if (unlikely((SDEBUG_OPT_MEDIUM_ERR & sdebug_opts) && (lba <= (sdebug_medium_error_start + sdebug_medium_error_count - 1)) && ((lba + num) > sdebug_medium_error_start))) { /* claim unrecoverable read error */ mk_sense_buffer(scp, MEDIUM_ERROR, UNRECOVERED_READ_ERR, 0); /* set info field and valid bit for fixed descriptor */ if (0x70 == (scp->sense_buffer[0] & 0x7f)) { scp->sense_buffer[0] |= 0x80; /* Valid bit */ ret = (lba < OPT_MEDIUM_ERR_ADDR) ? OPT_MEDIUM_ERR_ADDR : (int)lba; put_unaligned_be32(ret, scp->sense_buffer + 3); } scsi_set_resid(scp, scsi_bufflen(scp)); return check_condition_result; } sdeb_read_lock(sip); /* DIX + T10 DIF */ if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { switch (prot_verify_read(scp, lba, num, ei_lba)) { case 1: /* Guard tag error */ if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ sdeb_read_unlock(sip); mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); return check_condition_result; } else if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { sdeb_read_unlock(sip); mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); return illegal_condition_result; } break; case 3: /* Reference tag error */ if (cmd[1] >> 5 != 3) { /* RDPROTECT != 3 */ sdeb_read_unlock(sip); mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); return check_condition_result; } else if (scp->prot_flags & SCSI_PROT_REF_CHECK) { sdeb_read_unlock(sip); mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); return illegal_condition_result; } break; } } ret = do_device_access(sip, scp, 0, lba, num, false); sdeb_read_unlock(sip); if (unlikely(ret == -1)) return DID_ERROR << 16; scsi_set_resid(scp, scsi_bufflen(scp) - ret); if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && atomic_read(&sdeb_inject_pending))) { if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); atomic_set(&sdeb_inject_pending, 0); return check_condition_result; } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { /* Logical block guard check failed */ mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); return illegal_condition_result; } else if (SDEBUG_OPT_DIX_ERR & sdebug_opts) { mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); return illegal_condition_result; } } return 0; } static int prot_verify_write(struct scsi_cmnd *SCpnt, sector_t start_sec, unsigned int sectors, u32 ei_lba) { int ret; struct t10_pi_tuple *sdt; void *daddr; sector_t sector = start_sec; int ppage_offset; int dpage_offset; struct sg_mapping_iter diter; struct sg_mapping_iter piter; BUG_ON(scsi_sg_count(SCpnt) == 0); BUG_ON(scsi_prot_sg_count(SCpnt) == 0); sg_miter_start(&piter, scsi_prot_sglist(SCpnt), scsi_prot_sg_count(SCpnt), SG_MITER_ATOMIC | SG_MITER_FROM_SG); sg_miter_start(&diter, scsi_sglist(SCpnt), scsi_sg_count(SCpnt), SG_MITER_ATOMIC | SG_MITER_FROM_SG); /* For each protection page */ while (sg_miter_next(&piter)) { dpage_offset = 0; if (WARN_ON(!sg_miter_next(&diter))) { ret = 0x01; goto out; } for (ppage_offset = 0; ppage_offset < piter.length; ppage_offset += sizeof(struct t10_pi_tuple)) { /* If we're at the end of the current * data page advance to the next one */ if (dpage_offset >= diter.length) { if (WARN_ON(!sg_miter_next(&diter))) { ret = 0x01; goto out; } dpage_offset = 0; } sdt = piter.addr + ppage_offset; daddr = diter.addr + dpage_offset; if (SCpnt->cmnd[1] >> 5 != 3) { /* WRPROTECT */ ret = dif_verify(sdt, daddr, sector, ei_lba); if (ret) goto out; } sector++; ei_lba++; dpage_offset += sdebug_sector_size; } diter.consumed = dpage_offset; sg_miter_stop(&diter); } sg_miter_stop(&piter); dif_copy_prot(SCpnt, start_sec, sectors, false); dix_writes++; return 0; out: dif_errors++; sg_miter_stop(&diter); sg_miter_stop(&piter); return ret; } static unsigned long lba_to_map_index(sector_t lba) { if (sdebug_unmap_alignment) lba += sdebug_unmap_granularity - sdebug_unmap_alignment; sector_div(lba, sdebug_unmap_granularity); return lba; } static sector_t map_index_to_lba(unsigned long index) { sector_t lba = index * sdebug_unmap_granularity; if (sdebug_unmap_alignment) lba -= sdebug_unmap_granularity - sdebug_unmap_alignment; return lba; } static unsigned int map_state(struct sdeb_store_info *sip, sector_t lba, unsigned int *num) { sector_t end; unsigned int mapped; unsigned long index; unsigned long next; index = lba_to_map_index(lba); mapped = test_bit(index, sip->map_storep); if (mapped) next = find_next_zero_bit(sip->map_storep, map_size, index); else next = find_next_bit(sip->map_storep, map_size, index); end = min_t(sector_t, sdebug_store_sectors, map_index_to_lba(next)); *num = end - lba; return mapped; } static void map_region(struct sdeb_store_info *sip, sector_t lba, unsigned int len) { sector_t end = lba + len; while (lba < end) { unsigned long index = lba_to_map_index(lba); if (index < map_size) set_bit(index, sip->map_storep); lba = map_index_to_lba(index + 1); } } static void unmap_region(struct sdeb_store_info *sip, sector_t lba, unsigned int len) { sector_t end = lba + len; u8 *fsp = sip->storep; while (lba < end) { unsigned long index = lba_to_map_index(lba); if (lba == map_index_to_lba(index) && lba + sdebug_unmap_granularity <= end && index < map_size) { clear_bit(index, sip->map_storep); if (sdebug_lbprz) { /* for LBPRZ=2 return 0xff_s */ memset(fsp + lba * sdebug_sector_size, (sdebug_lbprz & 1) ? 0 : 0xff, sdebug_sector_size * sdebug_unmap_granularity); } if (sip->dif_storep) { memset(sip->dif_storep + lba, 0xff, sizeof(*sip->dif_storep) * sdebug_unmap_granularity); } } lba = map_index_to_lba(index + 1); } } static int resp_write_dt0(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { bool check_prot; u32 num; u32 ei_lba; int ret; u64 lba; struct sdeb_store_info *sip = devip2sip(devip, true); u8 *cmd = scp->cmnd; switch (cmd[0]) { case WRITE_16: ei_lba = 0; lba = get_unaligned_be64(cmd + 2); num = get_unaligned_be32(cmd + 10); check_prot = true; break; case WRITE_10: ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be16(cmd + 7); check_prot = true; break; case WRITE_6: ei_lba = 0; lba = (u32)cmd[3] | (u32)cmd[2] << 8 | (u32)(cmd[1] & 0x1f) << 16; num = (0 == cmd[4]) ? 256 : cmd[4]; check_prot = true; break; case WRITE_12: ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be32(cmd + 6); check_prot = true; break; case 0x53: /* XDWRITEREAD(10) */ ei_lba = 0; lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be16(cmd + 7); check_prot = false; break; default: /* assume WRITE(32) */ lba = get_unaligned_be64(cmd + 12); ei_lba = get_unaligned_be32(cmd + 20); num = get_unaligned_be32(cmd + 28); check_prot = false; break; } if (unlikely(have_dif_prot && check_prot)) { if (sdebug_dif == T10_PI_TYPE2_PROTECTION && (cmd[1] & 0xe0)) { mk_sense_invalid_opcode(scp); return check_condition_result; } if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || sdebug_dif == T10_PI_TYPE3_PROTECTION) && (cmd[1] & 0xe0) == 0) sdev_printk(KERN_ERR, scp->device, "Unprotected WR " "to DIF device\n"); } sdeb_write_lock(sip); ret = check_device_access_params(scp, lba, num, true); if (ret) { sdeb_write_unlock(sip); return ret; } /* DIX + T10 DIF */ if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { switch (prot_verify_write(scp, lba, num, ei_lba)) { case 1: /* Guard tag error */ if (scp->prot_flags & SCSI_PROT_GUARD_CHECK) { sdeb_write_unlock(sip); mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); return illegal_condition_result; } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ sdeb_write_unlock(sip); mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); return check_condition_result; } break; case 3: /* Reference tag error */ if (scp->prot_flags & SCSI_PROT_REF_CHECK) { sdeb_write_unlock(sip); mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 3); return illegal_condition_result; } else if (scp->cmnd[1] >> 5 != 3) { /* WRPROTECT != 3 */ sdeb_write_unlock(sip); mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 3); return check_condition_result; } break; } } ret = do_device_access(sip, scp, 0, lba, num, true); if (unlikely(scsi_debug_lbp())) map_region(sip, lba, num); /* If ZBC zone then bump its write pointer */ if (sdebug_dev_is_zoned(devip)) zbc_inc_wp(devip, lba, num); sdeb_write_unlock(sip); if (unlikely(-1 == ret)) return DID_ERROR << 16; else if (unlikely(sdebug_verbose && (ret < (num * sdebug_sector_size)))) sdev_printk(KERN_INFO, scp->device, "%s: write: cdb indicated=%u, IO sent=%d bytes\n", my_name, num * sdebug_sector_size, ret); if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && atomic_read(&sdeb_inject_pending))) { if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); atomic_set(&sdeb_inject_pending, 0); return check_condition_result; } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { /* Logical block guard check failed */ mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); return illegal_condition_result; } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); return illegal_condition_result; } } return 0; } /* * T10 has only specified WRITE SCATTERED(16) and WRITE SCATTERED(32). * No READ GATHERED yet (requires bidi or long cdb holding gather list). */ static int resp_write_scat(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; u8 *lrdp = NULL; u8 *up; struct sdeb_store_info *sip = devip2sip(devip, true); u8 wrprotect; u16 lbdof, num_lrd, k; u32 num, num_by, bt_len, lbdof_blen, sg_off, cum_lb; u32 lb_size = sdebug_sector_size; u32 ei_lba; u64 lba; int ret, res; bool is_16; static const u32 lrd_size = 32; /* + parameter list header size */ if (cmd[0] == VARIABLE_LENGTH_CMD) { is_16 = false; wrprotect = (cmd[10] >> 5) & 0x7; lbdof = get_unaligned_be16(cmd + 12); num_lrd = get_unaligned_be16(cmd + 16); bt_len = get_unaligned_be32(cmd + 28); } else { /* that leaves WRITE SCATTERED(16) */ is_16 = true; wrprotect = (cmd[2] >> 5) & 0x7; lbdof = get_unaligned_be16(cmd + 4); num_lrd = get_unaligned_be16(cmd + 8); bt_len = get_unaligned_be32(cmd + 10); if (unlikely(have_dif_prot)) { if (sdebug_dif == T10_PI_TYPE2_PROTECTION && wrprotect) { mk_sense_invalid_opcode(scp); return illegal_condition_result; } if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || sdebug_dif == T10_PI_TYPE3_PROTECTION) && wrprotect == 0) sdev_printk(KERN_ERR, scp->device, "Unprotected WR to DIF device\n"); } } if ((num_lrd == 0) || (bt_len == 0)) return 0; /* T10 says these do-nothings are not errors */ if (lbdof == 0) { if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: %s: LB Data Offset field bad\n", my_name, __func__); mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return illegal_condition_result; } lbdof_blen = lbdof * lb_size; if ((lrd_size + (num_lrd * lrd_size)) > lbdof_blen) { if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: %s: LBA range descriptors don't fit\n", my_name, __func__); mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); return illegal_condition_result; } lrdp = kzalloc(lbdof_blen, GFP_ATOMIC | __GFP_NOWARN); if (lrdp == NULL) return SCSI_MLQUEUE_HOST_BUSY; if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: %s: Fetch header+scatter_list, lbdof_blen=%u\n", my_name, __func__, lbdof_blen); res = fetch_to_dev_buffer(scp, lrdp, lbdof_blen); if (res == -1) { ret = DID_ERROR << 16; goto err_out; } sdeb_write_lock(sip); sg_off = lbdof_blen; /* Spec says Buffer xfer Length field in number of LBs in dout */ cum_lb = 0; for (k = 0, up = lrdp + lrd_size; k < num_lrd; ++k, up += lrd_size) { lba = get_unaligned_be64(up + 0); num = get_unaligned_be32(up + 8); if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: %s: k=%d LBA=0x%llx num=%u sg_off=%u\n", my_name, __func__, k, lba, num, sg_off); if (num == 0) continue; ret = check_device_access_params(scp, lba, num, true); if (ret) goto err_out_unlock; num_by = num * lb_size; ei_lba = is_16 ? 0 : get_unaligned_be32(up + 12); if ((cum_lb + num) > bt_len) { if (sdebug_verbose) sdev_printk(KERN_INFO, scp->device, "%s: %s: sum of blocks > data provided\n", my_name, __func__); mk_sense_buffer(scp, ILLEGAL_REQUEST, WRITE_ERROR_ASC, 0); ret = illegal_condition_result; goto err_out_unlock; } /* DIX + T10 DIF */ if (unlikely(sdebug_dix && scsi_prot_sg_count(scp))) { int prot_ret = prot_verify_write(scp, lba, num, ei_lba); if (prot_ret) { mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, prot_ret); ret = illegal_condition_result; goto err_out_unlock; } } ret = do_device_access(sip, scp, sg_off, lba, num, true); /* If ZBC zone then bump its write pointer */ if (sdebug_dev_is_zoned(devip)) zbc_inc_wp(devip, lba, num); if (unlikely(scsi_debug_lbp())) map_region(sip, lba, num); if (unlikely(-1 == ret)) { ret = DID_ERROR << 16; goto err_out_unlock; } else if (unlikely(sdebug_verbose && (ret < num_by))) sdev_printk(KERN_INFO, scp->device, "%s: write: cdb indicated=%u, IO sent=%d bytes\n", my_name, num_by, ret); if (unlikely((sdebug_opts & SDEBUG_OPT_RECOV_DIF_DIX) && atomic_read(&sdeb_inject_pending))) { if (sdebug_opts & SDEBUG_OPT_RECOVERED_ERR) { mk_sense_buffer(scp, RECOVERED_ERROR, THRESHOLD_EXCEEDED, 0); atomic_set(&sdeb_inject_pending, 0); ret = check_condition_result; goto err_out_unlock; } else if (sdebug_opts & SDEBUG_OPT_DIF_ERR) { /* Logical block guard check failed */ mk_sense_buffer(scp, ABORTED_COMMAND, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); ret = illegal_condition_result; goto err_out_unlock; } else if (sdebug_opts & SDEBUG_OPT_DIX_ERR) { mk_sense_buffer(scp, ILLEGAL_REQUEST, 0x10, 1); atomic_set(&sdeb_inject_pending, 0); ret = illegal_condition_result; goto err_out_unlock; } } sg_off += num_by; cum_lb += num; } ret = 0; err_out_unlock: sdeb_write_unlock(sip); err_out: kfree(lrdp); return ret; } static int resp_write_same(struct scsi_cmnd *scp, u64 lba, u32 num, u32 ei_lba, bool unmap, bool ndob) { struct scsi_device *sdp = scp->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; unsigned long long i; u64 block, lbaa; u32 lb_size = sdebug_sector_size; int ret; struct sdeb_store_info *sip = devip2sip((struct sdebug_dev_info *) scp->device->hostdata, true); u8 *fs1p; u8 *fsp; sdeb_write_lock(sip); ret = check_device_access_params(scp, lba, num, true); if (ret) { sdeb_write_unlock(sip); return ret; } if (unmap && scsi_debug_lbp()) { unmap_region(sip, lba, num); goto out; } lbaa = lba; block = do_div(lbaa, sdebug_store_sectors); /* if ndob then zero 1 logical block, else fetch 1 logical block */ fsp = sip->storep; fs1p = fsp + (block * lb_size); if (ndob) { memset(fs1p, 0, lb_size); ret = 0; } else ret = fetch_to_dev_buffer(scp, fs1p, lb_size); if (-1 == ret) { sdeb_write_unlock(sip); return DID_ERROR << 16; } else if (sdebug_verbose && !ndob && (ret < lb_size)) sdev_printk(KERN_INFO, scp->device, "%s: %s: lb size=%u, IO sent=%d bytes\n", my_name, "write same", lb_size, ret); /* Copy first sector to remaining blocks */ for (i = 1 ; i < num ; i++) { lbaa = lba + i; block = do_div(lbaa, sdebug_store_sectors); memmove(fsp + (block * lb_size), fs1p, lb_size); } if (scsi_debug_lbp()) map_region(sip, lba, num); /* If ZBC zone then bump its write pointer */ if (sdebug_dev_is_zoned(devip)) zbc_inc_wp(devip, lba, num); out: sdeb_write_unlock(sip); return 0; } static int resp_write_same_10(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; u32 lba; u16 num; u32 ei_lba = 0; bool unmap = false; if (cmd[1] & 0x8) { if (sdebug_lbpws10 == 0) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); return check_condition_result; } else unmap = true; } lba = get_unaligned_be32(cmd + 2); num = get_unaligned_be16(cmd + 7); if (num > sdebug_write_same_length) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); return check_condition_result; } return resp_write_same(scp, lba, num, ei_lba, unmap, false); } static int resp_write_same_16(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; u64 lba; u32 num; u32 ei_lba = 0; bool unmap = false; bool ndob = false; if (cmd[1] & 0x8) { /* UNMAP */ if (sdebug_lbpws == 0) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 3); return check_condition_result; } else unmap = true; } if (cmd[1] & 0x1) /* NDOB (no data-out buffer, assumes zeroes) */ ndob = true; lba = get_unaligned_be64(cmd + 2); num = get_unaligned_be32(cmd + 10); if (num > sdebug_write_same_length) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 10, -1); return check_condition_result; } return resp_write_same(scp, lba, num, ei_lba, unmap, ndob); } /* Note the mode field is in the same position as the (lower) service action * field. For the Report supported operation codes command, SPC-4 suggests * each mode of this command should be reported separately; for future. */ static int resp_write_buffer(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; struct scsi_device *sdp = scp->device; struct sdebug_dev_info *dp; u8 mode; mode = cmd[1] & 0x1f; switch (mode) { case 0x4: /* download microcode (MC) and activate (ACT) */ /* set UAs on this device only */ set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); set_bit(SDEBUG_UA_MICROCODE_CHANGED, devip->uas_bm); break; case 0x5: /* download MC, save and ACT */ set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, devip->uas_bm); break; case 0x6: /* download MC with offsets and ACT */ /* set UAs on most devices (LUs) in this target */ list_for_each_entry(dp, &devip->sdbg_host->dev_info_list, dev_list) if (dp->target == sdp->id) { set_bit(SDEBUG_UA_BUS_RESET, dp->uas_bm); if (devip != dp) set_bit(SDEBUG_UA_MICROCODE_CHANGED, dp->uas_bm); } break; case 0x7: /* download MC with offsets, save, and ACT */ /* set UA on all devices (LUs) in this target */ list_for_each_entry(dp, &devip->sdbg_host->dev_info_list, dev_list) if (dp->target == sdp->id) set_bit(SDEBUG_UA_MICROCODE_CHANGED_WO_RESET, dp->uas_bm); break; default: /* do nothing for this command for other mode values */ break; } return 0; } static int resp_comp_write(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; u8 *arr; struct sdeb_store_info *sip = devip2sip(devip, true); u64 lba; u32 dnum; u32 lb_size = sdebug_sector_size; u8 num; int ret; int retval = 0; lba = get_unaligned_be64(cmd + 2); num = cmd[13]; /* 1 to a maximum of 255 logical blocks */ if (0 == num) return 0; /* degenerate case, not an error */ if (sdebug_dif == T10_PI_TYPE2_PROTECTION && (cmd[1] & 0xe0)) { mk_sense_invalid_opcode(scp); return check_condition_result; } if ((sdebug_dif == T10_PI_TYPE1_PROTECTION || sdebug_dif == T10_PI_TYPE3_PROTECTION) && (cmd[1] & 0xe0) == 0) sdev_printk(KERN_ERR, scp->device, "Unprotected WR " "to DIF device\n"); ret = check_device_access_params(scp, lba, num, false); if (ret) return ret; dnum = 2 * num; arr = kcalloc(lb_size, dnum, GFP_ATOMIC); if (NULL == arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); return check_condition_result; } sdeb_write_lock(sip); ret = do_dout_fetch(scp, dnum, arr); if (ret == -1) { retval = DID_ERROR << 16; goto cleanup; } else if (sdebug_verbose && (ret < (dnum * lb_size))) sdev_printk(KERN_INFO, scp->device, "%s: compare_write: cdb " "indicated=%u, IO sent=%d bytes\n", my_name, dnum * lb_size, ret); if (!comp_write_worker(sip, lba, num, arr, false)) { mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); retval = check_condition_result; goto cleanup; } if (scsi_debug_lbp()) map_region(sip, lba, num); cleanup: sdeb_write_unlock(sip); kfree(arr); return retval; } struct unmap_block_desc { __be64 lba; __be32 blocks; __be32 __reserved; }; static int resp_unmap(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *buf; struct unmap_block_desc *desc; struct sdeb_store_info *sip = devip2sip(devip, true); unsigned int i, payload_len, descriptors; int ret; if (!scsi_debug_lbp()) return 0; /* fib and say its done */ payload_len = get_unaligned_be16(scp->cmnd + 7); BUG_ON(scsi_bufflen(scp) != payload_len); descriptors = (payload_len - 8) / 16; if (descriptors > sdebug_unmap_max_desc) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 7, -1); return check_condition_result; } buf = kzalloc(scsi_bufflen(scp), GFP_ATOMIC); if (!buf) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); return check_condition_result; } scsi_sg_copy_to_buffer(scp, buf, scsi_bufflen(scp)); BUG_ON(get_unaligned_be16(&buf[0]) != payload_len - 2); BUG_ON(get_unaligned_be16(&buf[2]) != descriptors * 16); desc = (void *)&buf[8]; sdeb_write_lock(sip); for (i = 0 ; i < descriptors ; i++) { unsigned long long lba = get_unaligned_be64(&desc[i].lba); unsigned int num = get_unaligned_be32(&desc[i].blocks); ret = check_device_access_params(scp, lba, num, true); if (ret) goto out; unmap_region(sip, lba, num); } ret = 0; out: sdeb_write_unlock(sip); kfree(buf); return ret; } #define SDEBUG_GET_LBA_STATUS_LEN 32 static int resp_get_lba_status(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { u8 *cmd = scp->cmnd; u64 lba; u32 alloc_len, mapped, num; int ret; u8 arr[SDEBUG_GET_LBA_STATUS_LEN]; lba = get_unaligned_be64(cmd + 2); alloc_len = get_unaligned_be32(cmd + 10); if (alloc_len < 24) return 0; ret = check_device_access_params(scp, lba, 1, false); if (ret) return ret; if (scsi_debug_lbp()) { struct sdeb_store_info *sip = devip2sip(devip, true); mapped = map_state(sip, lba, &num); } else { mapped = 1; /* following just in case virtual_gb changed */ sdebug_capacity = get_sdebug_capacity(); if (sdebug_capacity - lba <= 0xffffffff) num = sdebug_capacity - lba; else num = 0xffffffff; } memset(arr, 0, SDEBUG_GET_LBA_STATUS_LEN); put_unaligned_be32(20, arr); /* Parameter Data Length */ put_unaligned_be64(lba, arr + 8); /* LBA */ put_unaligned_be32(num, arr + 16); /* Number of blocks */ arr[20] = !mapped; /* prov_stat=0: mapped; 1: dealloc */ return fill_from_dev_buffer(scp, arr, SDEBUG_GET_LBA_STATUS_LEN); } static int resp_sync_cache(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int res = 0; u64 lba; u32 num_blocks; u8 *cmd = scp->cmnd; if (cmd[0] == SYNCHRONIZE_CACHE) { /* 10 byte cdb */ lba = get_unaligned_be32(cmd + 2); num_blocks = get_unaligned_be16(cmd + 7); } else { /* SYNCHRONIZE_CACHE(16) */ lba = get_unaligned_be64(cmd + 2); num_blocks = get_unaligned_be32(cmd + 10); } if (lba + num_blocks > sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); return check_condition_result; } if (!write_since_sync || (cmd[1] & 0x2)) res = SDEG_RES_IMMED_MASK; else /* delay if write_since_sync and IMMED clear */ write_since_sync = false; return res; } /* * Assuming the LBA+num_blocks is not out-of-range, this function will return * CONDITION MET if the specified blocks will/have fitted in the cache, and * a GOOD status otherwise. Model a disk with a big cache and yield * CONDITION MET. Actually tries to bring range in main memory into the * cache associated with the CPU(s). */ static int resp_pre_fetch(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int res = 0; u64 lba; u64 block, rest = 0; u32 nblks; u8 *cmd = scp->cmnd; struct sdeb_store_info *sip = devip2sip(devip, true); u8 *fsp = sip->storep; if (cmd[0] == PRE_FETCH) { /* 10 byte cdb */ lba = get_unaligned_be32(cmd + 2); nblks = get_unaligned_be16(cmd + 7); } else { /* PRE-FETCH(16) */ lba = get_unaligned_be64(cmd + 2); nblks = get_unaligned_be32(cmd + 10); } if (lba + nblks > sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); return check_condition_result; } if (!fsp) goto fini; /* PRE-FETCH spec says nothing about LBP or PI so skip them */ block = do_div(lba, sdebug_store_sectors); if (block + nblks > sdebug_store_sectors) rest = block + nblks - sdebug_store_sectors; /* Try to bring the PRE-FETCH range into CPU's cache */ sdeb_read_lock(sip); prefetch_range(fsp + (sdebug_sector_size * block), (nblks - rest) * sdebug_sector_size); if (rest) prefetch_range(fsp, rest * sdebug_sector_size); sdeb_read_unlock(sip); fini: if (cmd[1] & 0x2) res = SDEG_RES_IMMED_MASK; return res | condition_met_result; } #define RL_BUCKET_ELEMS 8 /* Even though each pseudo target has a REPORT LUNS "well known logical unit" * (W-LUN), the normal Linux scanning logic does not associate it with a * device (e.g. /dev/sg7). The following magic will make that association: * "cd /sys/class/scsi_host/host<n> ; echo '- - 49409' > scan" * where <n> is a host number. If there are multiple targets in a host then * the above will associate a W-LUN to each target. To only get a W-LUN * for target 2, then use "echo '- 2 49409' > scan" . */ static int resp_report_luns(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned char *cmd = scp->cmnd; unsigned int alloc_len; unsigned char select_report; u64 lun; struct scsi_lun *lun_p; u8 arr[RL_BUCKET_ELEMS * sizeof(struct scsi_lun)]; unsigned int lun_cnt; /* normal LUN count (max: 256) */ unsigned int wlun_cnt; /* report luns W-LUN count */ unsigned int tlun_cnt; /* total LUN count */ unsigned int rlen; /* response length (in bytes) */ int k, j, n, res; unsigned int off_rsp = 0; const int sz_lun = sizeof(struct scsi_lun); clear_luns_changed_on_target(devip); select_report = cmd[2]; alloc_len = get_unaligned_be32(cmd + 6); if (alloc_len < 4) { pr_err("alloc len too small %d\n", alloc_len); mk_sense_invalid_fld(scp, SDEB_IN_CDB, 6, -1); return check_condition_result; } switch (select_report) { case 0: /* all LUNs apart from W-LUNs */ lun_cnt = sdebug_max_luns; wlun_cnt = 0; break; case 1: /* only W-LUNs */ lun_cnt = 0; wlun_cnt = 1; break; case 2: /* all LUNs */ lun_cnt = sdebug_max_luns; wlun_cnt = 1; break; case 0x10: /* only administrative LUs */ case 0x11: /* see SPC-5 */ case 0x12: /* only subsiduary LUs owned by referenced LU */ default: pr_debug("select report invalid %d\n", select_report); mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, -1); return check_condition_result; } if (sdebug_no_lun_0 && (lun_cnt > 0)) --lun_cnt; tlun_cnt = lun_cnt + wlun_cnt; rlen = tlun_cnt * sz_lun; /* excluding 8 byte header */ scsi_set_resid(scp, scsi_bufflen(scp)); pr_debug("select_report %d luns = %d wluns = %d no_lun0 %d\n", select_report, lun_cnt, wlun_cnt, sdebug_no_lun_0); /* loops rely on sizeof response header same as sizeof lun (both 8) */ lun = sdebug_no_lun_0 ? 1 : 0; for (k = 0, j = 0, res = 0; true; ++k, j = 0) { memset(arr, 0, sizeof(arr)); lun_p = (struct scsi_lun *)&arr[0]; if (k == 0) { put_unaligned_be32(rlen, &arr[0]); ++lun_p; j = 1; } for ( ; j < RL_BUCKET_ELEMS; ++j, ++lun_p) { if ((k * RL_BUCKET_ELEMS) + j > lun_cnt) break; int_to_scsilun(lun++, lun_p); if (lun > 1 && sdebug_lun_am == SAM_LUN_AM_FLAT) lun_p->scsi_lun[0] |= 0x40; } if (j < RL_BUCKET_ELEMS) break; n = j * sz_lun; res = p_fill_from_dev_buffer(scp, arr, n, off_rsp); if (res) return res; off_rsp += n; } if (wlun_cnt) { int_to_scsilun(SCSI_W_LUN_REPORT_LUNS, lun_p); ++j; } if (j > 0) res = p_fill_from_dev_buffer(scp, arr, j * sz_lun, off_rsp); return res; } static int resp_verify(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { bool is_bytchk3 = false; u8 bytchk; int ret, j; u32 vnum, a_num, off; const u32 lb_size = sdebug_sector_size; u64 lba; u8 *arr; u8 *cmd = scp->cmnd; struct sdeb_store_info *sip = devip2sip(devip, true); bytchk = (cmd[1] >> 1) & 0x3; if (bytchk == 0) { return 0; /* always claim internal verify okay */ } else if (bytchk == 2) { mk_sense_invalid_fld(scp, SDEB_IN_CDB, 2, 2); return check_condition_result; } else if (bytchk == 3) { is_bytchk3 = true; /* 1 block sent, compared repeatedly */ } switch (cmd[0]) { case VERIFY_16: lba = get_unaligned_be64(cmd + 2); vnum = get_unaligned_be32(cmd + 10); break; case VERIFY: /* is VERIFY(10) */ lba = get_unaligned_be32(cmd + 2); vnum = get_unaligned_be16(cmd + 7); break; default: mk_sense_invalid_opcode(scp); return check_condition_result; } if (vnum == 0) return 0; /* not an error */ a_num = is_bytchk3 ? 1 : vnum; /* Treat following check like one for read (i.e. no write) access */ ret = check_device_access_params(scp, lba, a_num, false); if (ret) return ret; arr = kcalloc(lb_size, vnum, GFP_ATOMIC | __GFP_NOWARN); if (!arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); return check_condition_result; } /* Not changing store, so only need read access */ sdeb_read_lock(sip); ret = do_dout_fetch(scp, a_num, arr); if (ret == -1) { ret = DID_ERROR << 16; goto cleanup; } else if (sdebug_verbose && (ret < (a_num * lb_size))) { sdev_printk(KERN_INFO, scp->device, "%s: %s: cdb indicated=%u, IO sent=%d bytes\n", my_name, __func__, a_num * lb_size, ret); } if (is_bytchk3) { for (j = 1, off = lb_size; j < vnum; ++j, off += lb_size) memcpy(arr + off, arr, lb_size); } ret = 0; if (!comp_write_worker(sip, lba, vnum, arr, true)) { mk_sense_buffer(scp, MISCOMPARE, MISCOMPARE_VERIFY_ASC, 0); ret = check_condition_result; goto cleanup; } cleanup: sdeb_read_unlock(sip); kfree(arr); return ret; } #define RZONES_DESC_HD 64 /* Report zones depending on start LBA and reporting options */ static int resp_report_zones(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { unsigned int rep_max_zones, nrz = 0; int ret = 0; u32 alloc_len, rep_opts, rep_len; bool partial; u64 lba, zs_lba; u8 *arr = NULL, *desc; u8 *cmd = scp->cmnd; struct sdeb_zone_state *zsp = NULL; struct sdeb_store_info *sip = devip2sip(devip, false); if (!sdebug_dev_is_zoned(devip)) { mk_sense_invalid_opcode(scp); return check_condition_result; } zs_lba = get_unaligned_be64(cmd + 2); alloc_len = get_unaligned_be32(cmd + 10); if (alloc_len == 0) return 0; /* not an error */ rep_opts = cmd[14] & 0x3f; partial = cmd[14] & 0x80; if (zs_lba >= sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); return check_condition_result; } rep_max_zones = (alloc_len - 64) >> ilog2(RZONES_DESC_HD); arr = kzalloc(alloc_len, GFP_ATOMIC | __GFP_NOWARN); if (!arr) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INSUFF_RES_ASC, INSUFF_RES_ASCQ); return check_condition_result; } sdeb_read_lock(sip); desc = arr + 64; for (lba = zs_lba; lba < sdebug_capacity; lba = zsp->z_start + zsp->z_size) { if (WARN_ONCE(zbc_zone(devip, lba) == zsp, "lba = %llu\n", lba)) break; zsp = zbc_zone(devip, lba); switch (rep_opts) { case 0x00: /* All zones */ break; case 0x01: /* Empty zones */ if (zsp->z_cond != ZC1_EMPTY) continue; break; case 0x02: /* Implicit open zones */ if (zsp->z_cond != ZC2_IMPLICIT_OPEN) continue; break; case 0x03: /* Explicit open zones */ if (zsp->z_cond != ZC3_EXPLICIT_OPEN) continue; break; case 0x04: /* Closed zones */ if (zsp->z_cond != ZC4_CLOSED) continue; break; case 0x05: /* Full zones */ if (zsp->z_cond != ZC5_FULL) continue; break; case 0x06: case 0x07: case 0x10: /* * Read-only, offline, reset WP recommended are * not emulated: no zones to report; */ continue; case 0x11: /* non-seq-resource set */ if (!zsp->z_non_seq_resource) continue; break; case 0x3e: /* All zones except gap zones. */ if (zbc_zone_is_gap(zsp)) continue; break; case 0x3f: /* Not write pointer (conventional) zones */ if (zbc_zone_is_seq(zsp)) continue; break; default: mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); ret = check_condition_result; goto fini; } if (nrz < rep_max_zones) { /* Fill zone descriptor */ desc[0] = zsp->z_type; desc[1] = zsp->z_cond << 4; if (zsp->z_non_seq_resource) desc[1] |= 1 << 1; put_unaligned_be64((u64)zsp->z_size, desc + 8); put_unaligned_be64((u64)zsp->z_start, desc + 16); put_unaligned_be64((u64)zsp->z_wp, desc + 24); desc += 64; } if (partial && nrz >= rep_max_zones) break; nrz++; } /* Report header */ /* Zone list length. */ put_unaligned_be32(nrz * RZONES_DESC_HD, arr + 0); /* Maximum LBA */ put_unaligned_be64(sdebug_capacity - 1, arr + 8); /* Zone starting LBA granularity. */ if (devip->zcap < devip->zsize) put_unaligned_be64(devip->zsize, arr + 16); rep_len = (unsigned long)desc - (unsigned long)arr; ret = fill_from_dev_buffer(scp, arr, min_t(u32, alloc_len, rep_len)); fini: sdeb_read_unlock(sip); kfree(arr); return ret; } /* Logic transplanted from tcmu-runner, file_zbc.c */ static void zbc_open_all(struct sdebug_dev_info *devip) { struct sdeb_zone_state *zsp = &devip->zstate[0]; unsigned int i; for (i = 0; i < devip->nr_zones; i++, zsp++) { if (zsp->z_cond == ZC4_CLOSED) zbc_open_zone(devip, &devip->zstate[i], true); } } static int resp_open_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int res = 0; u64 z_id; enum sdebug_z_cond zc; u8 *cmd = scp->cmnd; struct sdeb_zone_state *zsp; bool all = cmd[14] & 0x01; struct sdeb_store_info *sip = devip2sip(devip, false); if (!sdebug_dev_is_zoned(devip)) { mk_sense_invalid_opcode(scp); return check_condition_result; } sdeb_write_lock(sip); if (all) { /* Check if all closed zones can be open */ if (devip->max_open && devip->nr_exp_open + devip->nr_closed > devip->max_open) { mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, INSUFF_ZONE_ASCQ); res = check_condition_result; goto fini; } /* Open all closed zones */ zbc_open_all(devip); goto fini; } /* Open the specified zone */ z_id = get_unaligned_be64(cmd + 2); if (z_id >= sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); res = check_condition_result; goto fini; } zsp = zbc_zone(devip, z_id); if (z_id != zsp->z_start) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } if (zbc_zone_is_conv(zsp)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } zc = zsp->z_cond; if (zc == ZC3_EXPLICIT_OPEN || zc == ZC5_FULL) goto fini; if (devip->max_open && devip->nr_exp_open >= devip->max_open) { mk_sense_buffer(scp, DATA_PROTECT, INSUFF_RES_ASC, INSUFF_ZONE_ASCQ); res = check_condition_result; goto fini; } zbc_open_zone(devip, zsp, true); fini: sdeb_write_unlock(sip); return res; } static void zbc_close_all(struct sdebug_dev_info *devip) { unsigned int i; for (i = 0; i < devip->nr_zones; i++) zbc_close_zone(devip, &devip->zstate[i]); } static int resp_close_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int res = 0; u64 z_id; u8 *cmd = scp->cmnd; struct sdeb_zone_state *zsp; bool all = cmd[14] & 0x01; struct sdeb_store_info *sip = devip2sip(devip, false); if (!sdebug_dev_is_zoned(devip)) { mk_sense_invalid_opcode(scp); return check_condition_result; } sdeb_write_lock(sip); if (all) { zbc_close_all(devip); goto fini; } /* Close specified zone */ z_id = get_unaligned_be64(cmd + 2); if (z_id >= sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); res = check_condition_result; goto fini; } zsp = zbc_zone(devip, z_id); if (z_id != zsp->z_start) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } if (zbc_zone_is_conv(zsp)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } zbc_close_zone(devip, zsp); fini: sdeb_write_unlock(sip); return res; } static void zbc_finish_zone(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp, bool empty) { enum sdebug_z_cond zc = zsp->z_cond; if (zc == ZC4_CLOSED || zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN || (empty && zc == ZC1_EMPTY)) { if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) zbc_close_zone(devip, zsp); if (zsp->z_cond == ZC4_CLOSED) devip->nr_closed--; zsp->z_wp = zsp->z_start + zsp->z_size; zsp->z_cond = ZC5_FULL; } } static void zbc_finish_all(struct sdebug_dev_info *devip) { unsigned int i; for (i = 0; i < devip->nr_zones; i++) zbc_finish_zone(devip, &devip->zstate[i], false); } static int resp_finish_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { struct sdeb_zone_state *zsp; int res = 0; u64 z_id; u8 *cmd = scp->cmnd; bool all = cmd[14] & 0x01; struct sdeb_store_info *sip = devip2sip(devip, false); if (!sdebug_dev_is_zoned(devip)) { mk_sense_invalid_opcode(scp); return check_condition_result; } sdeb_write_lock(sip); if (all) { zbc_finish_all(devip); goto fini; } /* Finish the specified zone */ z_id = get_unaligned_be64(cmd + 2); if (z_id >= sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); res = check_condition_result; goto fini; } zsp = zbc_zone(devip, z_id); if (z_id != zsp->z_start) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } if (zbc_zone_is_conv(zsp)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } zbc_finish_zone(devip, zsp, true); fini: sdeb_write_unlock(sip); return res; } static void zbc_rwp_zone(struct sdebug_dev_info *devip, struct sdeb_zone_state *zsp) { enum sdebug_z_cond zc; struct sdeb_store_info *sip = devip2sip(devip, false); if (!zbc_zone_is_seq(zsp)) return; zc = zsp->z_cond; if (zc == ZC2_IMPLICIT_OPEN || zc == ZC3_EXPLICIT_OPEN) zbc_close_zone(devip, zsp); if (zsp->z_cond == ZC4_CLOSED) devip->nr_closed--; if (zsp->z_wp > zsp->z_start) memset(sip->storep + zsp->z_start * sdebug_sector_size, 0, (zsp->z_wp - zsp->z_start) * sdebug_sector_size); zsp->z_non_seq_resource = false; zsp->z_wp = zsp->z_start; zsp->z_cond = ZC1_EMPTY; } static void zbc_rwp_all(struct sdebug_dev_info *devip) { unsigned int i; for (i = 0; i < devip->nr_zones; i++) zbc_rwp_zone(devip, &devip->zstate[i]); } static int resp_rwp_zone(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { struct sdeb_zone_state *zsp; int res = 0; u64 z_id; u8 *cmd = scp->cmnd; bool all = cmd[14] & 0x01; struct sdeb_store_info *sip = devip2sip(devip, false); if (!sdebug_dev_is_zoned(devip)) { mk_sense_invalid_opcode(scp); return check_condition_result; } sdeb_write_lock(sip); if (all) { zbc_rwp_all(devip); goto fini; } z_id = get_unaligned_be64(cmd + 2); if (z_id >= sdebug_capacity) { mk_sense_buffer(scp, ILLEGAL_REQUEST, LBA_OUT_OF_RANGE, 0); res = check_condition_result; goto fini; } zsp = zbc_zone(devip, z_id); if (z_id != zsp->z_start) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } if (zbc_zone_is_conv(zsp)) { mk_sense_buffer(scp, ILLEGAL_REQUEST, INVALID_FIELD_IN_CDB, 0); res = check_condition_result; goto fini; } zbc_rwp_zone(devip, zsp); fini: sdeb_write_unlock(sip); return res; } static u32 get_tag(struct scsi_cmnd *cmnd) { return blk_mq_unique_tag(scsi_cmd_to_rq(cmnd)); } /* Queued (deferred) command completions converge here. */ static void sdebug_q_cmd_complete(struct sdebug_defer *sd_dp) { struct sdebug_queued_cmd *sqcp = container_of(sd_dp, struct sdebug_queued_cmd, sd_dp); unsigned long flags; struct scsi_cmnd *scp = sqcp->scmd; struct sdebug_scsi_cmd *sdsc; bool aborted; if (sdebug_statistics) { atomic_inc(&sdebug_completions); if (raw_smp_processor_id() != sd_dp->issuing_cpu) atomic_inc(&sdebug_miss_cpus); } if (!scp) { pr_err("scmd=NULL\n"); goto out; } sdsc = scsi_cmd_priv(scp); spin_lock_irqsave(&sdsc->lock, flags); aborted = sd_dp->aborted; if (unlikely(aborted)) sd_dp->aborted = false; ASSIGN_QUEUED_CMD(scp, NULL); spin_unlock_irqrestore(&sdsc->lock, flags); if (aborted) { pr_info("bypassing scsi_done() due to aborted cmd, kicking-off EH\n"); blk_abort_request(scsi_cmd_to_rq(scp)); goto out; } scsi_done(scp); /* callback to mid level */ out: sdebug_free_queued_cmd(sqcp); } /* When high resolution timer goes off this function is called. */ static enum hrtimer_restart sdebug_q_cmd_hrt_complete(struct hrtimer *timer) { struct sdebug_defer *sd_dp = container_of(timer, struct sdebug_defer, hrt); sdebug_q_cmd_complete(sd_dp); return HRTIMER_NORESTART; } /* When work queue schedules work, it calls this function. */ static void sdebug_q_cmd_wq_complete(struct work_struct *work) { struct sdebug_defer *sd_dp = container_of(work, struct sdebug_defer, ew.work); sdebug_q_cmd_complete(sd_dp); } static bool got_shared_uuid; static uuid_t shared_uuid; static int sdebug_device_create_zones(struct sdebug_dev_info *devip) { struct sdeb_zone_state *zsp; sector_t capacity = get_sdebug_capacity(); sector_t conv_capacity; sector_t zstart = 0; unsigned int i; /* * Set the zone size: if sdeb_zbc_zone_size_mb is not set, figure out * a zone size allowing for at least 4 zones on the device. Otherwise, * use the specified zone size checking that at least 2 zones can be * created for the device. */ if (!sdeb_zbc_zone_size_mb) { devip->zsize = (DEF_ZBC_ZONE_SIZE_MB * SZ_1M) >> ilog2(sdebug_sector_size); while (capacity < devip->zsize << 2 && devip->zsize >= 2) devip->zsize >>= 1; if (devip->zsize < 2) { pr_err("Device capacity too small\n"); return -EINVAL; } } else { if (!is_power_of_2(sdeb_zbc_zone_size_mb)) { pr_err("Zone size is not a power of 2\n"); return -EINVAL; } devip->zsize = (sdeb_zbc_zone_size_mb * SZ_1M) >> ilog2(sdebug_sector_size); if (devip->zsize >= capacity) { pr_err("Zone size too large for device capacity\n"); return -EINVAL; } } devip->zsize_shift = ilog2(devip->zsize); devip->nr_zones = (capacity + devip->zsize - 1) >> devip->zsize_shift; if (sdeb_zbc_zone_cap_mb == 0) { devip->zcap = devip->zsize; } else { devip->zcap = (sdeb_zbc_zone_cap_mb * SZ_1M) >> ilog2(sdebug_sector_size); if (devip->zcap > devip->zsize) { pr_err("Zone capacity too large\n"); return -EINVAL; } } conv_capacity = (sector_t)sdeb_zbc_nr_conv << devip->zsize_shift; if (conv_capacity >= capacity) { pr_err("Number of conventional zones too large\n"); return -EINVAL; } devip->nr_conv_zones = sdeb_zbc_nr_conv; devip->nr_seq_zones = ALIGN(capacity - conv_capacity, devip->zsize) >> devip->zsize_shift; devip->nr_zones = devip->nr_conv_zones + devip->nr_seq_zones; /* Add gap zones if zone capacity is smaller than the zone size */ if (devip->zcap < devip->zsize) devip->nr_zones += devip->nr_seq_zones; if (devip->zmodel == BLK_ZONED_HM) { /* zbc_max_open_zones can be 0, meaning "not reported" */ if (sdeb_zbc_max_open >= devip->nr_zones - 1) devip->max_open = (devip->nr_zones - 1) / 2; else devip->max_open = sdeb_zbc_max_open; } devip->zstate = kcalloc(devip->nr_zones, sizeof(struct sdeb_zone_state), GFP_KERNEL); if (!devip->zstate) return -ENOMEM; for (i = 0; i < devip->nr_zones; i++) { zsp = &devip->zstate[i]; zsp->z_start = zstart; if (i < devip->nr_conv_zones) { zsp->z_type = ZBC_ZTYPE_CNV; zsp->z_cond = ZBC_NOT_WRITE_POINTER; zsp->z_wp = (sector_t)-1; zsp->z_size = min_t(u64, devip->zsize, capacity - zstart); } else if ((zstart & (devip->zsize - 1)) == 0) { if (devip->zmodel == BLK_ZONED_HM) zsp->z_type = ZBC_ZTYPE_SWR; else zsp->z_type = ZBC_ZTYPE_SWP; zsp->z_cond = ZC1_EMPTY; zsp->z_wp = zsp->z_start; zsp->z_size = min_t(u64, devip->zcap, capacity - zstart); } else { zsp->z_type = ZBC_ZTYPE_GAP; zsp->z_cond = ZBC_NOT_WRITE_POINTER; zsp->z_wp = (sector_t)-1; zsp->z_size = min_t(u64, devip->zsize - devip->zcap, capacity - zstart); } WARN_ON_ONCE((int)zsp->z_size <= 0); zstart += zsp->z_size; } return 0; } static struct sdebug_dev_info *sdebug_device_create( struct sdebug_host_info *sdbg_host, gfp_t flags) { struct sdebug_dev_info *devip; devip = kzalloc(sizeof(*devip), flags); if (devip) { if (sdebug_uuid_ctl == 1) uuid_gen(&devip->lu_name); else if (sdebug_uuid_ctl == 2) { if (got_shared_uuid) devip->lu_name = shared_uuid; else { uuid_gen(&shared_uuid); got_shared_uuid = true; devip->lu_name = shared_uuid; } } devip->sdbg_host = sdbg_host; if (sdeb_zbc_in_use) { devip->zmodel = sdeb_zbc_model; if (sdebug_device_create_zones(devip)) { kfree(devip); return NULL; } } else { devip->zmodel = BLK_ZONED_NONE; } devip->create_ts = ktime_get_boottime(); atomic_set(&devip->stopped, (sdeb_tur_ms_to_ready > 0 ? 2 : 0)); spin_lock_init(&devip->list_lock); INIT_LIST_HEAD(&devip->inject_err_list); list_add_tail(&devip->dev_list, &sdbg_host->dev_info_list); } return devip; } static struct sdebug_dev_info *find_build_dev_info(struct scsi_device *sdev) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *open_devip = NULL; struct sdebug_dev_info *devip; sdbg_host = shost_to_sdebug_host(sdev->host); list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { if ((devip->used) && (devip->channel == sdev->channel) && (devip->target == sdev->id) && (devip->lun == sdev->lun)) return devip; else { if ((!devip->used) && (!open_devip)) open_devip = devip; } } if (!open_devip) { /* try and make a new one */ open_devip = sdebug_device_create(sdbg_host, GFP_ATOMIC); if (!open_devip) { pr_err("out of memory at line %d\n", __LINE__); return NULL; } } open_devip->channel = sdev->channel; open_devip->target = sdev->id; open_devip->lun = sdev->lun; open_devip->sdbg_host = sdbg_host; set_bit(SDEBUG_UA_POOCCUR, open_devip->uas_bm); open_devip->used = true; return open_devip; } static int scsi_debug_slave_alloc(struct scsi_device *sdp) { if (sdebug_verbose) pr_info("slave_alloc <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); return 0; } static int scsi_debug_slave_configure(struct scsi_device *sdp) { struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct dentry *dentry; if (sdebug_verbose) pr_info("slave_configure <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (sdp->host->max_cmd_len != SDEBUG_MAX_CMD_LEN) sdp->host->max_cmd_len = SDEBUG_MAX_CMD_LEN; if (devip == NULL) { devip = find_build_dev_info(sdp); if (devip == NULL) return 1; /* no resources, will be marked offline */ } sdp->hostdata = devip; if (sdebug_no_uld) sdp->no_uld_attach = 1; config_cdb_len(sdp); if (sdebug_allow_restart) sdp->allow_restart = 1; devip->debugfs_entry = debugfs_create_dir(dev_name(&sdp->sdev_dev), sdebug_debugfs_root); if (IS_ERR_OR_NULL(devip->debugfs_entry)) pr_info("%s: failed to create debugfs directory for device %s\n", __func__, dev_name(&sdp->sdev_gendev)); dentry = debugfs_create_file("error", 0600, devip->debugfs_entry, sdp, &sdebug_error_fops); if (IS_ERR_OR_NULL(dentry)) pr_info("%s: failed to create error file for device %s\n", __func__, dev_name(&sdp->sdev_gendev)); return 0; } static void scsi_debug_slave_destroy(struct scsi_device *sdp) { struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; if (sdebug_verbose) pr_info("slave_destroy <%u %u %u %llu>\n", sdp->host->host_no, sdp->channel, sdp->id, sdp->lun); if (!devip) return; spin_lock(&devip->list_lock); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { list_del_rcu(&err->list); call_rcu(&err->rcu, sdebug_err_free); } spin_unlock(&devip->list_lock); debugfs_remove(devip->debugfs_entry); /* make this slot available for re-use */ devip->used = false; sdp->hostdata = NULL; } /* Returns true if we require the queued memory to be freed by the caller. */ static bool stop_qc_helper(struct sdebug_defer *sd_dp, enum sdeb_defer_type defer_t) { if (defer_t == SDEB_DEFER_HRT) { int res = hrtimer_try_to_cancel(&sd_dp->hrt); switch (res) { case 0: /* Not active, it must have already run */ case -1: /* -1 It's executing the CB */ return false; case 1: /* Was active, we've now cancelled */ default: return true; } } else if (defer_t == SDEB_DEFER_WQ) { /* Cancel if pending */ if (cancel_work_sync(&sd_dp->ew.work)) return true; /* Was not pending, so it must have run */ return false; } else if (defer_t == SDEB_DEFER_POLL) { return true; } return false; } static bool scsi_debug_stop_cmnd(struct scsi_cmnd *cmnd) { enum sdeb_defer_type l_defer_t; struct sdebug_defer *sd_dp; struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); struct sdebug_queued_cmd *sqcp = TO_QUEUED_CMD(cmnd); lockdep_assert_held(&sdsc->lock); if (!sqcp) return false; sd_dp = &sqcp->sd_dp; l_defer_t = READ_ONCE(sd_dp->defer_t); ASSIGN_QUEUED_CMD(cmnd, NULL); if (stop_qc_helper(sd_dp, l_defer_t)) sdebug_free_queued_cmd(sqcp); return true; } /* * Called from scsi_debug_abort() only, which is for timed-out cmd. */ static bool scsi_debug_abort_cmnd(struct scsi_cmnd *cmnd) { struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); unsigned long flags; bool res; spin_lock_irqsave(&sdsc->lock, flags); res = scsi_debug_stop_cmnd(cmnd); spin_unlock_irqrestore(&sdsc->lock, flags); return res; } /* * All we can do is set the cmnd as internally aborted and wait for it to * finish. We cannot call scsi_done() as normal completion path may do that. */ static bool sdebug_stop_cmnd(struct request *rq, void *data) { scsi_debug_abort_cmnd(blk_mq_rq_to_pdu(rq)); return true; } /* Deletes (stops) timers or work queues of all queued commands */ static void stop_all_queued(void) { struct sdebug_host_info *sdhp; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { struct Scsi_Host *shost = sdhp->shost; blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_stop_cmnd, NULL); } mutex_unlock(&sdebug_host_list_mutex); } static int sdebug_fail_abort(struct scsi_cmnd *cmnd) { struct scsi_device *sdp = cmnd->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; unsigned char *cmd = cmnd->cmnd; int ret = 0; if (devip == NULL) return 0; rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == ERR_ABORT_CMD_FAILED && (err->cmd == cmd[0] || err->cmd == 0xff)) { ret = !!err->cnt; if (err->cnt < 0) err->cnt++; rcu_read_unlock(); return ret; } } rcu_read_unlock(); return 0; } static int scsi_debug_abort(struct scsi_cmnd *SCpnt) { bool ok = scsi_debug_abort_cmnd(SCpnt); u8 *cmd = SCpnt->cmnd; u8 opcode = cmd[0]; ++num_aborts; if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s: command%s found\n", __func__, ok ? "" : " not"); if (sdebug_fail_abort(SCpnt)) { scmd_printk(KERN_INFO, SCpnt, "fail abort command 0x%x\n", opcode); return FAILED; } return SUCCESS; } static bool scsi_debug_stop_all_queued_iter(struct request *rq, void *data) { struct scsi_device *sdp = data; struct scsi_cmnd *scmd = blk_mq_rq_to_pdu(rq); if (scmd->device == sdp) scsi_debug_abort_cmnd(scmd); return true; } /* Deletes (stops) timers or work queues of all queued commands per sdev */ static void scsi_debug_stop_all_queued(struct scsi_device *sdp) { struct Scsi_Host *shost = sdp->host; blk_mq_tagset_busy_iter(&shost->tag_set, scsi_debug_stop_all_queued_iter, sdp); } static int sdebug_fail_lun_reset(struct scsi_cmnd *cmnd) { struct scsi_device *sdp = cmnd->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; unsigned char *cmd = cmnd->cmnd; int ret = 0; if (devip == NULL) return 0; rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == ERR_LUN_RESET_FAILED && (err->cmd == cmd[0] || err->cmd == 0xff)) { ret = !!err->cnt; if (err->cnt < 0) err->cnt++; rcu_read_unlock(); return ret; } } rcu_read_unlock(); return 0; } static int scsi_debug_device_reset(struct scsi_cmnd *SCpnt) { struct scsi_device *sdp = SCpnt->device; struct sdebug_dev_info *devip = sdp->hostdata; u8 *cmd = SCpnt->cmnd; u8 opcode = cmd[0]; ++num_dev_resets; if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); scsi_debug_stop_all_queued(sdp); if (devip) set_bit(SDEBUG_UA_POR, devip->uas_bm); if (sdebug_fail_lun_reset(SCpnt)) { scmd_printk(KERN_INFO, SCpnt, "fail lun reset 0x%x\n", opcode); return FAILED; } return SUCCESS; } static int sdebug_fail_target_reset(struct scsi_cmnd *cmnd) { struct scsi_target *starget = scsi_target(cmnd->device); struct sdebug_target_info *targetip = (struct sdebug_target_info *)starget->hostdata; if (targetip) return targetip->reset_fail; return 0; } static int scsi_debug_target_reset(struct scsi_cmnd *SCpnt) { struct scsi_device *sdp = SCpnt->device; struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host); struct sdebug_dev_info *devip; u8 *cmd = SCpnt->cmnd; u8 opcode = cmd[0]; int k = 0; ++num_target_resets; if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { if (devip->target == sdp->id) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } } if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdp, "%s: %d device(s) found in target\n", __func__, k); if (sdebug_fail_target_reset(SCpnt)) { scmd_printk(KERN_INFO, SCpnt, "fail target reset 0x%x\n", opcode); return FAILED; } return SUCCESS; } static int scsi_debug_bus_reset(struct scsi_cmnd *SCpnt) { struct scsi_device *sdp = SCpnt->device; struct sdebug_host_info *sdbg_host = shost_to_sdebug_host(sdp->host); struct sdebug_dev_info *devip; int k = 0; ++num_bus_resets; if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdp, "%s\n", __func__); list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdp, "%s: %d device(s) found in host\n", __func__, k); return SUCCESS; } static int scsi_debug_host_reset(struct scsi_cmnd *SCpnt) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *devip; int k = 0; ++num_host_resets; if (SDEBUG_OPT_ALL_NOISE & sdebug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s\n", __func__); mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdbg_host, &sdebug_host_list, host_list) { list_for_each_entry(devip, &sdbg_host->dev_info_list, dev_list) { set_bit(SDEBUG_UA_BUS_RESET, devip->uas_bm); ++k; } } mutex_unlock(&sdebug_host_list_mutex); stop_all_queued(); if (SDEBUG_OPT_RESET_NOISE & sdebug_opts) sdev_printk(KERN_INFO, SCpnt->device, "%s: %d device(s) found\n", __func__, k); return SUCCESS; } static void sdebug_build_parts(unsigned char *ramp, unsigned long store_size) { struct msdos_partition *pp; int starts[SDEBUG_MAX_PARTS + 2], max_part_secs; int sectors_per_part, num_sectors, k; int heads_by_sects, start_sec, end_sec; /* assume partition table already zeroed */ if ((sdebug_num_parts < 1) || (store_size < 1048576)) return; if (sdebug_num_parts > SDEBUG_MAX_PARTS) { sdebug_num_parts = SDEBUG_MAX_PARTS; pr_warn("reducing partitions to %d\n", SDEBUG_MAX_PARTS); } num_sectors = (int)get_sdebug_capacity(); sectors_per_part = (num_sectors - sdebug_sectors_per) / sdebug_num_parts; heads_by_sects = sdebug_heads * sdebug_sectors_per; starts[0] = sdebug_sectors_per; max_part_secs = sectors_per_part; for (k = 1; k < sdebug_num_parts; ++k) { starts[k] = ((k * sectors_per_part) / heads_by_sects) * heads_by_sects; if (starts[k] - starts[k - 1] < max_part_secs) max_part_secs = starts[k] - starts[k - 1]; } starts[sdebug_num_parts] = num_sectors; starts[sdebug_num_parts + 1] = 0; ramp[510] = 0x55; /* magic partition markings */ ramp[511] = 0xAA; pp = (struct msdos_partition *)(ramp + 0x1be); for (k = 0; starts[k + 1]; ++k, ++pp) { start_sec = starts[k]; end_sec = starts[k] + max_part_secs - 1; pp->boot_ind = 0; pp->cyl = start_sec / heads_by_sects; pp->head = (start_sec - (pp->cyl * heads_by_sects)) / sdebug_sectors_per; pp->sector = (start_sec % sdebug_sectors_per) + 1; pp->end_cyl = end_sec / heads_by_sects; pp->end_head = (end_sec - (pp->end_cyl * heads_by_sects)) / sdebug_sectors_per; pp->end_sector = (end_sec % sdebug_sectors_per) + 1; pp->start_sect = cpu_to_le32(start_sec); pp->nr_sects = cpu_to_le32(end_sec - start_sec + 1); pp->sys_ind = 0x83; /* plain Linux partition */ } } static void block_unblock_all_queues(bool block) { struct sdebug_host_info *sdhp; lockdep_assert_held(&sdebug_host_list_mutex); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { struct Scsi_Host *shost = sdhp->shost; if (block) scsi_block_requests(shost); else scsi_unblock_requests(shost); } } /* Adjust (by rounding down) the sdebug_cmnd_count so abs(every_nth)-1 * commands will be processed normally before triggers occur. */ static void tweak_cmnd_count(void) { int count, modulo; modulo = abs(sdebug_every_nth); if (modulo < 2) return; mutex_lock(&sdebug_host_list_mutex); block_unblock_all_queues(true); count = atomic_read(&sdebug_cmnd_count); atomic_set(&sdebug_cmnd_count, (count / modulo) * modulo); block_unblock_all_queues(false); mutex_unlock(&sdebug_host_list_mutex); } static void clear_queue_stats(void) { atomic_set(&sdebug_cmnd_count, 0); atomic_set(&sdebug_completions, 0); atomic_set(&sdebug_miss_cpus, 0); atomic_set(&sdebug_a_tsf, 0); } static bool inject_on_this_cmd(void) { if (sdebug_every_nth == 0) return false; return (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth)) == 0; } #define INCLUSIVE_TIMING_MAX_NS 1000000 /* 1 millisecond */ void sdebug_free_queued_cmd(struct sdebug_queued_cmd *sqcp) { if (sqcp) kmem_cache_free(queued_cmd_cache, sqcp); } static struct sdebug_queued_cmd *sdebug_alloc_queued_cmd(struct scsi_cmnd *scmd) { struct sdebug_queued_cmd *sqcp; struct sdebug_defer *sd_dp; sqcp = kmem_cache_zalloc(queued_cmd_cache, GFP_ATOMIC); if (!sqcp) return NULL; sd_dp = &sqcp->sd_dp; hrtimer_init(&sd_dp->hrt, CLOCK_MONOTONIC, HRTIMER_MODE_REL_PINNED); sd_dp->hrt.function = sdebug_q_cmd_hrt_complete; INIT_WORK(&sd_dp->ew.work, sdebug_q_cmd_wq_complete); sqcp->scmd = scmd; return sqcp; } /* Complete the processing of the thread that queued a SCSI command to this * driver. It either completes the command by calling cmnd_done() or * schedules a hr timer or work queue then returns 0. Returns * SCSI_MLQUEUE_HOST_BUSY if temporarily out of resources. */ static int schedule_resp(struct scsi_cmnd *cmnd, struct sdebug_dev_info *devip, int scsi_result, int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *), int delta_jiff, int ndelay) { struct request *rq = scsi_cmd_to_rq(cmnd); bool polled = rq->cmd_flags & REQ_POLLED; struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmnd); unsigned long flags; u64 ns_from_boot = 0; struct sdebug_queued_cmd *sqcp; struct scsi_device *sdp; struct sdebug_defer *sd_dp; if (unlikely(devip == NULL)) { if (scsi_result == 0) scsi_result = DID_NO_CONNECT << 16; goto respond_in_thread; } sdp = cmnd->device; if (delta_jiff == 0) goto respond_in_thread; if (unlikely(sdebug_every_nth && (SDEBUG_OPT_RARE_TSF & sdebug_opts) && (scsi_result == 0))) { int num_in_q = scsi_device_busy(sdp); int qdepth = cmnd->device->queue_depth; if ((num_in_q == qdepth) && (atomic_inc_return(&sdebug_a_tsf) >= abs(sdebug_every_nth))) { atomic_set(&sdebug_a_tsf, 0); scsi_result = device_qfull_result; if (unlikely(SDEBUG_OPT_Q_NOISE & sdebug_opts)) sdev_printk(KERN_INFO, sdp, "%s: num_in_q=%d +1, <inject> status: TASK SET FULL\n", __func__, num_in_q); } } sqcp = sdebug_alloc_queued_cmd(cmnd); if (!sqcp) { pr_err("%s no alloc\n", __func__); return SCSI_MLQUEUE_HOST_BUSY; } sd_dp = &sqcp->sd_dp; if (polled) ns_from_boot = ktime_get_boottime_ns(); /* one of the resp_*() response functions is called here */ cmnd->result = pfp ? pfp(cmnd, devip) : 0; if (cmnd->result & SDEG_RES_IMMED_MASK) { cmnd->result &= ~SDEG_RES_IMMED_MASK; delta_jiff = ndelay = 0; } if (cmnd->result == 0 && scsi_result != 0) cmnd->result = scsi_result; if (cmnd->result == 0 && unlikely(sdebug_opts & SDEBUG_OPT_TRANSPORT_ERR)) { if (atomic_read(&sdeb_inject_pending)) { mk_sense_buffer(cmnd, ABORTED_COMMAND, TRANSPORT_PROBLEM, ACK_NAK_TO); atomic_set(&sdeb_inject_pending, 0); cmnd->result = check_condition_result; } } if (unlikely(sdebug_verbose && cmnd->result)) sdev_printk(KERN_INFO, sdp, "%s: non-zero result=0x%x\n", __func__, cmnd->result); if (delta_jiff > 0 || ndelay > 0) { ktime_t kt; if (delta_jiff > 0) { u64 ns = jiffies_to_nsecs(delta_jiff); if (sdebug_random && ns < U32_MAX) { ns = get_random_u32_below((u32)ns); } else if (sdebug_random) { ns >>= 12; /* scale to 4 usec precision */ if (ns < U32_MAX) /* over 4 hours max */ ns = get_random_u32_below((u32)ns); ns <<= 12; } kt = ns_to_ktime(ns); } else { /* ndelay has a 4.2 second max */ kt = sdebug_random ? get_random_u32_below((u32)ndelay) : (u32)ndelay; if (ndelay < INCLUSIVE_TIMING_MAX_NS) { u64 d = ktime_get_boottime_ns() - ns_from_boot; if (kt <= d) { /* elapsed duration >= kt */ /* call scsi_done() from this thread */ sdebug_free_queued_cmd(sqcp); scsi_done(cmnd); return 0; } /* otherwise reduce kt by elapsed time */ kt -= d; } } if (sdebug_statistics) sd_dp->issuing_cpu = raw_smp_processor_id(); if (polled) { spin_lock_irqsave(&sdsc->lock, flags); sd_dp->cmpl_ts = ktime_add(ns_to_ktime(ns_from_boot), kt); ASSIGN_QUEUED_CMD(cmnd, sqcp); WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); spin_unlock_irqrestore(&sdsc->lock, flags); } else { /* schedule the invocation of scsi_done() for a later time */ spin_lock_irqsave(&sdsc->lock, flags); ASSIGN_QUEUED_CMD(cmnd, sqcp); WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_HRT); hrtimer_start(&sd_dp->hrt, kt, HRTIMER_MODE_REL_PINNED); /* * The completion handler will try to grab sqcp->lock, * so there is no chance that the completion handler * will call scsi_done() until we release the lock * here (so ok to keep referencing sdsc). */ spin_unlock_irqrestore(&sdsc->lock, flags); } } else { /* jdelay < 0, use work queue */ if (unlikely((sdebug_opts & SDEBUG_OPT_CMD_ABORT) && atomic_read(&sdeb_inject_pending))) { sd_dp->aborted = true; atomic_set(&sdeb_inject_pending, 0); sdev_printk(KERN_INFO, sdp, "abort request tag=%#x\n", blk_mq_unique_tag_to_tag(get_tag(cmnd))); } if (sdebug_statistics) sd_dp->issuing_cpu = raw_smp_processor_id(); if (polled) { spin_lock_irqsave(&sdsc->lock, flags); ASSIGN_QUEUED_CMD(cmnd, sqcp); sd_dp->cmpl_ts = ns_to_ktime(ns_from_boot); WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_POLL); spin_unlock_irqrestore(&sdsc->lock, flags); } else { spin_lock_irqsave(&sdsc->lock, flags); ASSIGN_QUEUED_CMD(cmnd, sqcp); WRITE_ONCE(sd_dp->defer_t, SDEB_DEFER_WQ); schedule_work(&sd_dp->ew.work); spin_unlock_irqrestore(&sdsc->lock, flags); } } return 0; respond_in_thread: /* call back to mid-layer using invocation thread */ cmnd->result = pfp != NULL ? pfp(cmnd, devip) : 0; cmnd->result &= ~SDEG_RES_IMMED_MASK; if (cmnd->result == 0 && scsi_result != 0) cmnd->result = scsi_result; scsi_done(cmnd); return 0; } /* Note: The following macros create attribute files in the /sys/module/scsi_debug/parameters directory. Unfortunately this driver is unaware of a change and cannot trigger auxiliary actions as it can when the corresponding attribute in the /sys/bus/pseudo/drivers/scsi_debug directory is changed. */ module_param_named(add_host, sdebug_add_host, int, S_IRUGO | S_IWUSR); module_param_named(ato, sdebug_ato, int, S_IRUGO); module_param_named(cdb_len, sdebug_cdb_len, int, 0644); module_param_named(clustering, sdebug_clustering, bool, S_IRUGO | S_IWUSR); module_param_named(delay, sdebug_jdelay, int, S_IRUGO | S_IWUSR); module_param_named(dev_size_mb, sdebug_dev_size_mb, int, S_IRUGO); module_param_named(dif, sdebug_dif, int, S_IRUGO); module_param_named(dix, sdebug_dix, int, S_IRUGO); module_param_named(dsense, sdebug_dsense, int, S_IRUGO | S_IWUSR); module_param_named(every_nth, sdebug_every_nth, int, S_IRUGO | S_IWUSR); module_param_named(fake_rw, sdebug_fake_rw, int, S_IRUGO | S_IWUSR); module_param_named(guard, sdebug_guard, uint, S_IRUGO); module_param_named(host_lock, sdebug_host_lock, bool, S_IRUGO | S_IWUSR); module_param_named(host_max_queue, sdebug_host_max_queue, int, S_IRUGO); module_param_string(inq_product, sdebug_inq_product_id, sizeof(sdebug_inq_product_id), S_IRUGO | S_IWUSR); module_param_string(inq_rev, sdebug_inq_product_rev, sizeof(sdebug_inq_product_rev), S_IRUGO | S_IWUSR); module_param_string(inq_vendor, sdebug_inq_vendor_id, sizeof(sdebug_inq_vendor_id), S_IRUGO | S_IWUSR); module_param_named(lbprz, sdebug_lbprz, int, S_IRUGO); module_param_named(lbpu, sdebug_lbpu, int, S_IRUGO); module_param_named(lbpws, sdebug_lbpws, int, S_IRUGO); module_param_named(lbpws10, sdebug_lbpws10, int, S_IRUGO); module_param_named(lowest_aligned, sdebug_lowest_aligned, int, S_IRUGO); module_param_named(lun_format, sdebug_lun_am_i, int, S_IRUGO | S_IWUSR); module_param_named(max_luns, sdebug_max_luns, int, S_IRUGO | S_IWUSR); module_param_named(max_queue, sdebug_max_queue, int, S_IRUGO | S_IWUSR); module_param_named(medium_error_count, sdebug_medium_error_count, int, S_IRUGO | S_IWUSR); module_param_named(medium_error_start, sdebug_medium_error_start, int, S_IRUGO | S_IWUSR); module_param_named(ndelay, sdebug_ndelay, int, S_IRUGO | S_IWUSR); module_param_named(no_lun_0, sdebug_no_lun_0, int, S_IRUGO | S_IWUSR); module_param_named(no_rwlock, sdebug_no_rwlock, bool, S_IRUGO | S_IWUSR); module_param_named(no_uld, sdebug_no_uld, int, S_IRUGO); module_param_named(num_parts, sdebug_num_parts, int, S_IRUGO); module_param_named(num_tgts, sdebug_num_tgts, int, S_IRUGO | S_IWUSR); module_param_named(opt_blks, sdebug_opt_blks, int, S_IRUGO); module_param_named(opt_xferlen_exp, sdebug_opt_xferlen_exp, int, S_IRUGO); module_param_named(opts, sdebug_opts, int, S_IRUGO | S_IWUSR); module_param_named(per_host_store, sdebug_per_host_store, bool, S_IRUGO | S_IWUSR); module_param_named(physblk_exp, sdebug_physblk_exp, int, S_IRUGO); module_param_named(ptype, sdebug_ptype, int, S_IRUGO | S_IWUSR); module_param_named(random, sdebug_random, bool, S_IRUGO | S_IWUSR); module_param_named(removable, sdebug_removable, bool, S_IRUGO | S_IWUSR); module_param_named(scsi_level, sdebug_scsi_level, int, S_IRUGO); module_param_named(sector_size, sdebug_sector_size, int, S_IRUGO); module_param_named(statistics, sdebug_statistics, bool, S_IRUGO | S_IWUSR); module_param_named(strict, sdebug_strict, bool, S_IRUGO | S_IWUSR); module_param_named(submit_queues, submit_queues, int, S_IRUGO); module_param_named(poll_queues, poll_queues, int, S_IRUGO); module_param_named(tur_ms_to_ready, sdeb_tur_ms_to_ready, int, S_IRUGO); module_param_named(unmap_alignment, sdebug_unmap_alignment, int, S_IRUGO); module_param_named(unmap_granularity, sdebug_unmap_granularity, int, S_IRUGO); module_param_named(unmap_max_blocks, sdebug_unmap_max_blocks, int, S_IRUGO); module_param_named(unmap_max_desc, sdebug_unmap_max_desc, int, S_IRUGO); module_param_named(uuid_ctl, sdebug_uuid_ctl, int, S_IRUGO); module_param_named(virtual_gb, sdebug_virtual_gb, int, S_IRUGO | S_IWUSR); module_param_named(vpd_use_hostno, sdebug_vpd_use_hostno, int, S_IRUGO | S_IWUSR); module_param_named(wp, sdebug_wp, bool, S_IRUGO | S_IWUSR); module_param_named(write_same_length, sdebug_write_same_length, int, S_IRUGO | S_IWUSR); module_param_named(zbc, sdeb_zbc_model_s, charp, S_IRUGO); module_param_named(zone_cap_mb, sdeb_zbc_zone_cap_mb, int, S_IRUGO); module_param_named(zone_max_open, sdeb_zbc_max_open, int, S_IRUGO); module_param_named(zone_nr_conv, sdeb_zbc_nr_conv, int, S_IRUGO); module_param_named(zone_size_mb, sdeb_zbc_zone_size_mb, int, S_IRUGO); module_param_named(allow_restart, sdebug_allow_restart, bool, S_IRUGO | S_IWUSR); MODULE_AUTHOR("Eric Youngdale + Douglas Gilbert"); MODULE_DESCRIPTION("SCSI debug adapter driver"); MODULE_LICENSE("GPL"); MODULE_VERSION(SDEBUG_VERSION); MODULE_PARM_DESC(add_host, "add n hosts, in sysfs if negative remove host(s) (def=1)"); MODULE_PARM_DESC(ato, "application tag ownership: 0=disk 1=host (def=1)"); MODULE_PARM_DESC(cdb_len, "suggest CDB lengths to drivers (def=10)"); MODULE_PARM_DESC(clustering, "when set enables larger transfers (def=0)"); MODULE_PARM_DESC(delay, "response delay (def=1 jiffy); 0:imm, -1,-2:tiny"); MODULE_PARM_DESC(dev_size_mb, "size in MiB of ram shared by devs(def=8)"); MODULE_PARM_DESC(dif, "data integrity field type: 0-3 (def=0)"); MODULE_PARM_DESC(dix, "data integrity extensions mask (def=0)"); MODULE_PARM_DESC(dsense, "use descriptor sense format(def=0 -> fixed)"); MODULE_PARM_DESC(every_nth, "timeout every nth command(def=0)"); MODULE_PARM_DESC(fake_rw, "fake reads/writes instead of copying (def=0)"); MODULE_PARM_DESC(guard, "protection checksum: 0=crc, 1=ip (def=0)"); MODULE_PARM_DESC(host_lock, "host_lock is ignored (def=0)"); MODULE_PARM_DESC(host_max_queue, "host max # of queued cmds (0 to max(def) [max_queue fixed equal for !0])"); MODULE_PARM_DESC(inq_product, "SCSI INQUIRY product string (def=\"scsi_debug\")"); MODULE_PARM_DESC(inq_rev, "SCSI INQUIRY revision string (def=\"" SDEBUG_VERSION "\")"); MODULE_PARM_DESC(inq_vendor, "SCSI INQUIRY vendor string (def=\"Linux\")"); MODULE_PARM_DESC(lbprz, "on read unmapped LBs return 0 when 1 (def), return 0xff when 2"); MODULE_PARM_DESC(lbpu, "enable LBP, support UNMAP command (def=0)"); MODULE_PARM_DESC(lbpws, "enable LBP, support WRITE SAME(16) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lbpws10, "enable LBP, support WRITE SAME(10) with UNMAP bit (def=0)"); MODULE_PARM_DESC(lowest_aligned, "lowest aligned lba (def=0)"); MODULE_PARM_DESC(lun_format, "LUN format: 0->peripheral (def); 1 --> flat address method"); MODULE_PARM_DESC(max_luns, "number of LUNs per target to simulate(def=1)"); MODULE_PARM_DESC(max_queue, "max number of queued commands (1 to max(def))"); MODULE_PARM_DESC(medium_error_count, "count of sectors to return follow on MEDIUM error"); MODULE_PARM_DESC(medium_error_start, "starting sector number to return MEDIUM error"); MODULE_PARM_DESC(ndelay, "response delay in nanoseconds (def=0 -> ignore)"); MODULE_PARM_DESC(no_lun_0, "no LU number 0 (def=0 -> have lun 0)"); MODULE_PARM_DESC(no_rwlock, "don't protect user data reads+writes (def=0)"); MODULE_PARM_DESC(no_uld, "stop ULD (e.g. sd driver) attaching (def=0))"); MODULE_PARM_DESC(num_parts, "number of partitions(def=0)"); MODULE_PARM_DESC(num_tgts, "number of targets per host to simulate(def=1)"); MODULE_PARM_DESC(opt_blks, "optimal transfer length in blocks (def=1024)"); MODULE_PARM_DESC(opt_xferlen_exp, "optimal transfer length granularity exponent (def=physblk_exp)"); MODULE_PARM_DESC(opts, "1->noise, 2->medium_err, 4->timeout, 8->recovered_err... (def=0)"); MODULE_PARM_DESC(per_host_store, "If set, next positive add_host will get new store (def=0)"); MODULE_PARM_DESC(physblk_exp, "physical block exponent (def=0)"); MODULE_PARM_DESC(poll_queues, "support for iouring iopoll queues (1 to max(submit_queues - 1))"); MODULE_PARM_DESC(ptype, "SCSI peripheral type(def=0[disk])"); MODULE_PARM_DESC(random, "If set, uniformly randomize command duration between 0 and delay_in_ns"); MODULE_PARM_DESC(removable, "claim to have removable media (def=0)"); MODULE_PARM_DESC(scsi_level, "SCSI level to simulate(def=7[SPC-5])"); MODULE_PARM_DESC(sector_size, "logical block size in bytes (def=512)"); MODULE_PARM_DESC(statistics, "collect statistics on commands, queues (def=0)"); MODULE_PARM_DESC(strict, "stricter checks: reserved field in cdb (def=0)"); MODULE_PARM_DESC(submit_queues, "support for block multi-queue (def=1)"); MODULE_PARM_DESC(tur_ms_to_ready, "TEST UNIT READY millisecs before initial good status (def=0)"); MODULE_PARM_DESC(unmap_alignment, "lowest aligned thin provisioning lba (def=0)"); MODULE_PARM_DESC(unmap_granularity, "thin provisioning granularity in blocks (def=1)"); MODULE_PARM_DESC(unmap_max_blocks, "max # of blocks can be unmapped in one cmd (def=0xffffffff)"); MODULE_PARM_DESC(unmap_max_desc, "max # of ranges that can be unmapped in one cmd (def=256)"); MODULE_PARM_DESC(uuid_ctl, "1->use uuid for lu name, 0->don't, 2->all use same (def=0)"); MODULE_PARM_DESC(virtual_gb, "virtual gigabyte (GiB) size (def=0 -> use dev_size_mb)"); MODULE_PARM_DESC(vpd_use_hostno, "0 -> dev ids ignore hostno (def=1 -> unique dev ids)"); MODULE_PARM_DESC(wp, "Write Protect (def=0)"); MODULE_PARM_DESC(write_same_length, "Maximum blocks per WRITE SAME cmd (def=0xffff)"); MODULE_PARM_DESC(zbc, "'none' [0]; 'aware' [1]; 'managed' [2] (def=0). Can have 'host-' prefix"); MODULE_PARM_DESC(zone_cap_mb, "Zone capacity in MiB (def=zone size)"); MODULE_PARM_DESC(zone_max_open, "Maximum number of open zones; [0] for no limit (def=auto)"); MODULE_PARM_DESC(zone_nr_conv, "Number of conventional zones (def=1)"); MODULE_PARM_DESC(zone_size_mb, "Zone size in MiB (def=auto)"); MODULE_PARM_DESC(allow_restart, "Set scsi_device's allow_restart flag(def=0)"); #define SDEBUG_INFO_LEN 256 static char sdebug_info[SDEBUG_INFO_LEN]; static const char *scsi_debug_info(struct Scsi_Host *shp) { int k; k = scnprintf(sdebug_info, SDEBUG_INFO_LEN, "%s: version %s [%s]\n", my_name, SDEBUG_VERSION, sdebug_version_date); if (k >= (SDEBUG_INFO_LEN - 1)) return sdebug_info; scnprintf(sdebug_info + k, SDEBUG_INFO_LEN - k, " dev_size_mb=%d, opts=0x%x, submit_queues=%d, %s=%d", sdebug_dev_size_mb, sdebug_opts, submit_queues, "statistics", (int)sdebug_statistics); return sdebug_info; } /* 'echo <val> > /proc/scsi/scsi_debug/<host_id>' writes to opts */ static int scsi_debug_write_info(struct Scsi_Host *host, char *buffer, int length) { char arr[16]; int opts; int minLen = length > 15 ? 15 : length; if (!capable(CAP_SYS_ADMIN) || !capable(CAP_SYS_RAWIO)) return -EACCES; memcpy(arr, buffer, minLen); arr[minLen] = '\0'; if (1 != sscanf(arr, "%d", &opts)) return -EINVAL; sdebug_opts = opts; sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); if (sdebug_every_nth != 0) tweak_cmnd_count(); return length; } struct sdebug_submit_queue_data { int *first; int *last; int queue_num; }; static bool sdebug_submit_queue_iter(struct request *rq, void *opaque) { struct sdebug_submit_queue_data *data = opaque; u32 unique_tag = blk_mq_unique_tag(rq); u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag); u16 tag = blk_mq_unique_tag_to_tag(unique_tag); int queue_num = data->queue_num; if (hwq != queue_num) return true; /* Rely on iter'ing in ascending tag order */ if (*data->first == -1) *data->first = *data->last = tag; else *data->last = tag; return true; } /* Output seen with 'cat /proc/scsi/scsi_debug/<host_id>'. It will be the * same for each scsi_debug host (if more than one). Some of the counters * output are not atomics so might be inaccurate in a busy system. */ static int scsi_debug_show_info(struct seq_file *m, struct Scsi_Host *host) { struct sdebug_host_info *sdhp; int j; seq_printf(m, "scsi_debug adapter driver, version %s [%s]\n", SDEBUG_VERSION, sdebug_version_date); seq_printf(m, "num_tgts=%d, %ssize=%d MB, opts=0x%x, every_nth=%d\n", sdebug_num_tgts, "shared (ram) ", sdebug_dev_size_mb, sdebug_opts, sdebug_every_nth); seq_printf(m, "delay=%d, ndelay=%d, max_luns=%d, sector_size=%d %s\n", sdebug_jdelay, sdebug_ndelay, sdebug_max_luns, sdebug_sector_size, "bytes"); seq_printf(m, "cylinders=%d, heads=%d, sectors=%d, command aborts=%d\n", sdebug_cylinders_per, sdebug_heads, sdebug_sectors_per, num_aborts); seq_printf(m, "RESETs: device=%d, target=%d, bus=%d, host=%d\n", num_dev_resets, num_target_resets, num_bus_resets, num_host_resets); seq_printf(m, "dix_reads=%d, dix_writes=%d, dif_errors=%d\n", dix_reads, dix_writes, dif_errors); seq_printf(m, "usec_in_jiffy=%lu, statistics=%d\n", TICK_NSEC / 1000, sdebug_statistics); seq_printf(m, "cmnd_count=%d, completions=%d, %s=%d, a_tsf=%d, mq_polls=%d\n", atomic_read(&sdebug_cmnd_count), atomic_read(&sdebug_completions), "miss_cpus", atomic_read(&sdebug_miss_cpus), atomic_read(&sdebug_a_tsf), atomic_read(&sdeb_mq_poll_count)); seq_printf(m, "submit_queues=%d\n", submit_queues); for (j = 0; j < submit_queues; ++j) { int f = -1, l = -1; struct sdebug_submit_queue_data data = { .queue_num = j, .first = &f, .last = &l, }; seq_printf(m, " queue %d:\n", j); blk_mq_tagset_busy_iter(&host->tag_set, sdebug_submit_queue_iter, &data); if (f >= 0) { seq_printf(m, " in_use_bm BUSY: %s: %d,%d\n", "first,last bits", f, l); } } seq_printf(m, "this host_no=%d\n", host->host_no); if (!xa_empty(per_store_ap)) { bool niu; int idx; unsigned long l_idx; struct sdeb_store_info *sip; seq_puts(m, "\nhost list:\n"); j = 0; list_for_each_entry(sdhp, &sdebug_host_list, host_list) { idx = sdhp->si_idx; seq_printf(m, " %d: host_no=%d, si_idx=%d\n", j, sdhp->shost->host_no, idx); ++j; } seq_printf(m, "\nper_store array [most_recent_idx=%d]:\n", sdeb_most_recent_idx); j = 0; xa_for_each(per_store_ap, l_idx, sip) { niu = xa_get_mark(per_store_ap, l_idx, SDEB_XA_NOT_IN_USE); idx = (int)l_idx; seq_printf(m, " %d: idx=%d%s\n", j, idx, (niu ? " not_in_use" : "")); ++j; } } return 0; } static ssize_t delay_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_jdelay); } /* Returns -EBUSY if jdelay is being changed and commands are queued. The unit * of delay is jiffies. */ static ssize_t delay_store(struct device_driver *ddp, const char *buf, size_t count) { int jdelay, res; if (count > 0 && sscanf(buf, "%d", &jdelay) == 1) { res = count; if (sdebug_jdelay != jdelay) { struct sdebug_host_info *sdhp; mutex_lock(&sdebug_host_list_mutex); block_unblock_all_queues(true); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { struct Scsi_Host *shost = sdhp->shost; if (scsi_host_busy(shost)) { res = -EBUSY; /* queued commands */ break; } } if (res > 0) { sdebug_jdelay = jdelay; sdebug_ndelay = 0; } block_unblock_all_queues(false); mutex_unlock(&sdebug_host_list_mutex); } return res; } return -EINVAL; } static DRIVER_ATTR_RW(delay); static ssize_t ndelay_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ndelay); } /* Returns -EBUSY if ndelay is being changed and commands are queued */ /* If > 0 and accepted then sdebug_jdelay is set to JDELAY_OVERRIDDEN */ static ssize_t ndelay_store(struct device_driver *ddp, const char *buf, size_t count) { int ndelay, res; if ((count > 0) && (1 == sscanf(buf, "%d", &ndelay)) && (ndelay >= 0) && (ndelay < (1000 * 1000 * 1000))) { res = count; if (sdebug_ndelay != ndelay) { struct sdebug_host_info *sdhp; mutex_lock(&sdebug_host_list_mutex); block_unblock_all_queues(true); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { struct Scsi_Host *shost = sdhp->shost; if (scsi_host_busy(shost)) { res = -EBUSY; /* queued commands */ break; } } if (res > 0) { sdebug_ndelay = ndelay; sdebug_jdelay = ndelay ? JDELAY_OVERRIDDEN : DEF_JDELAY; } block_unblock_all_queues(false); mutex_unlock(&sdebug_host_list_mutex); } return res; } return -EINVAL; } static DRIVER_ATTR_RW(ndelay); static ssize_t opts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "0x%x\n", sdebug_opts); } static ssize_t opts_store(struct device_driver *ddp, const char *buf, size_t count) { int opts; char work[20]; if (sscanf(buf, "%10s", work) == 1) { if (strncasecmp(work, "0x", 2) == 0) { if (kstrtoint(work + 2, 16, &opts) == 0) goto opts_done; } else { if (kstrtoint(work, 10, &opts) == 0) goto opts_done; } } return -EINVAL; opts_done: sdebug_opts = opts; sdebug_verbose = !!(SDEBUG_OPT_NOISE & opts); sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & opts); tweak_cmnd_count(); return count; } static DRIVER_ATTR_RW(opts); static ssize_t ptype_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ptype); } static ssize_t ptype_store(struct device_driver *ddp, const char *buf, size_t count) { int n; /* Cannot change from or to TYPE_ZBC with sysfs */ if (sdebug_ptype == TYPE_ZBC) return -EINVAL; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { if (n == TYPE_ZBC) return -EINVAL; sdebug_ptype = n; return count; } return -EINVAL; } static DRIVER_ATTR_RW(ptype); static ssize_t dsense_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dsense); } static ssize_t dsense_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_dsense = n; return count; } return -EINVAL; } static DRIVER_ATTR_RW(dsense); static ssize_t fake_rw_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_fake_rw); } static ssize_t fake_rw_store(struct device_driver *ddp, const char *buf, size_t count) { int n, idx; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { bool want_store = (n == 0); struct sdebug_host_info *sdhp; n = (n > 0); sdebug_fake_rw = (sdebug_fake_rw > 0); if (sdebug_fake_rw == n) return count; /* not transitioning so do nothing */ if (want_store) { /* 1 --> 0 transition, set up store */ if (sdeb_first_idx < 0) { idx = sdebug_add_store(); if (idx < 0) return idx; } else { idx = sdeb_first_idx; xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); } /* make all hosts use same store */ list_for_each_entry(sdhp, &sdebug_host_list, host_list) { if (sdhp->si_idx != idx) { xa_set_mark(per_store_ap, sdhp->si_idx, SDEB_XA_NOT_IN_USE); sdhp->si_idx = idx; } } sdeb_most_recent_idx = idx; } else { /* 0 --> 1 transition is trigger for shrink */ sdebug_erase_all_stores(true /* apart from first */); } sdebug_fake_rw = n; return count; } return -EINVAL; } static DRIVER_ATTR_RW(fake_rw); static ssize_t no_lun_0_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_lun_0); } static ssize_t no_lun_0_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_no_lun_0 = n; return count; } return -EINVAL; } static DRIVER_ATTR_RW(no_lun_0); static ssize_t num_tgts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_tgts); } static ssize_t num_tgts_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_num_tgts = n; sdebug_max_tgts_luns(); return count; } return -EINVAL; } static DRIVER_ATTR_RW(num_tgts); static ssize_t dev_size_mb_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dev_size_mb); } static DRIVER_ATTR_RO(dev_size_mb); static ssize_t per_host_store_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_per_host_store); } static ssize_t per_host_store_store(struct device_driver *ddp, const char *buf, size_t count) { bool v; if (kstrtobool(buf, &v)) return -EINVAL; sdebug_per_host_store = v; return count; } static DRIVER_ATTR_RW(per_host_store); static ssize_t num_parts_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_parts); } static DRIVER_ATTR_RO(num_parts); static ssize_t every_nth_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_every_nth); } static ssize_t every_nth_store(struct device_driver *ddp, const char *buf, size_t count) { int nth; char work[20]; if (sscanf(buf, "%10s", work) == 1) { if (strncasecmp(work, "0x", 2) == 0) { if (kstrtoint(work + 2, 16, &nth) == 0) goto every_nth_done; } else { if (kstrtoint(work, 10, &nth) == 0) goto every_nth_done; } } return -EINVAL; every_nth_done: sdebug_every_nth = nth; if (nth && !sdebug_statistics) { pr_info("every_nth needs statistics=1, set it\n"); sdebug_statistics = true; } tweak_cmnd_count(); return count; } static DRIVER_ATTR_RW(every_nth); static ssize_t lun_format_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_lun_am); } static ssize_t lun_format_store(struct device_driver *ddp, const char *buf, size_t count) { int n; bool changed; if (kstrtoint(buf, 0, &n)) return -EINVAL; if (n >= 0) { if (n > (int)SAM_LUN_AM_FLAT) { pr_warn("only LUN address methods 0 and 1 are supported\n"); return -EINVAL; } changed = ((int)sdebug_lun_am != n); sdebug_lun_am = n; if (changed && sdebug_scsi_level >= 5) { /* >= SPC-3 */ struct sdebug_host_info *sdhp; struct sdebug_dev_info *dp; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); } } mutex_unlock(&sdebug_host_list_mutex); } return count; } return -EINVAL; } static DRIVER_ATTR_RW(lun_format); static ssize_t max_luns_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_luns); } static ssize_t max_luns_store(struct device_driver *ddp, const char *buf, size_t count) { int n; bool changed; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { if (n > 256) { pr_warn("max_luns can be no more than 256\n"); return -EINVAL; } changed = (sdebug_max_luns != n); sdebug_max_luns = n; sdebug_max_tgts_luns(); if (changed && (sdebug_scsi_level >= 5)) { /* >= SPC-3 */ struct sdebug_host_info *sdhp; struct sdebug_dev_info *dp; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { set_bit(SDEBUG_UA_LUNS_CHANGED, dp->uas_bm); } } mutex_unlock(&sdebug_host_list_mutex); } return count; } return -EINVAL; } static DRIVER_ATTR_RW(max_luns); static ssize_t max_queue_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_max_queue); } /* N.B. max_queue can be changed while there are queued commands. In flight * commands beyond the new max_queue will be completed. */ static ssize_t max_queue_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n > 0) && (n <= SDEBUG_CANQUEUE) && (sdebug_host_max_queue == 0)) { mutex_lock(&sdebug_host_list_mutex); /* We may only change sdebug_max_queue when we have no shosts */ if (list_empty(&sdebug_host_list)) sdebug_max_queue = n; else count = -EBUSY; mutex_unlock(&sdebug_host_list_mutex); return count; } return -EINVAL; } static DRIVER_ATTR_RW(max_queue); static ssize_t host_max_queue_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_host_max_queue); } static ssize_t no_rwlock_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_rwlock); } static ssize_t no_rwlock_store(struct device_driver *ddp, const char *buf, size_t count) { bool v; if (kstrtobool(buf, &v)) return -EINVAL; sdebug_no_rwlock = v; return count; } static DRIVER_ATTR_RW(no_rwlock); /* * Since this is used for .can_queue, and we get the hc_idx tag from the bitmap * in range [0, sdebug_host_max_queue), we can't change it. */ static DRIVER_ATTR_RO(host_max_queue); static ssize_t no_uld_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_no_uld); } static DRIVER_ATTR_RO(no_uld); static ssize_t scsi_level_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_scsi_level); } static DRIVER_ATTR_RO(scsi_level); static ssize_t virtual_gb_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_virtual_gb); } static ssize_t virtual_gb_store(struct device_driver *ddp, const char *buf, size_t count) { int n; bool changed; /* Ignore capacity change for ZBC drives for now */ if (sdeb_zbc_in_use) return -ENOTSUPP; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { changed = (sdebug_virtual_gb != n); sdebug_virtual_gb = n; sdebug_capacity = get_sdebug_capacity(); if (changed) { struct sdebug_host_info *sdhp; struct sdebug_dev_info *dp; mutex_lock(&sdebug_host_list_mutex); list_for_each_entry(sdhp, &sdebug_host_list, host_list) { list_for_each_entry(dp, &sdhp->dev_info_list, dev_list) { set_bit(SDEBUG_UA_CAPACITY_CHANGED, dp->uas_bm); } } mutex_unlock(&sdebug_host_list_mutex); } return count; } return -EINVAL; } static DRIVER_ATTR_RW(virtual_gb); static ssize_t add_host_show(struct device_driver *ddp, char *buf) { /* absolute number of hosts currently active is what is shown */ return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_num_hosts); } static ssize_t add_host_store(struct device_driver *ddp, const char *buf, size_t count) { bool found; unsigned long idx; struct sdeb_store_info *sip; bool want_phs = (sdebug_fake_rw == 0) && sdebug_per_host_store; int delta_hosts; if (sscanf(buf, "%d", &delta_hosts) != 1) return -EINVAL; if (delta_hosts > 0) { do { found = false; if (want_phs) { xa_for_each_marked(per_store_ap, idx, sip, SDEB_XA_NOT_IN_USE) { sdeb_most_recent_idx = (int)idx; found = true; break; } if (found) /* re-use case */ sdebug_add_host_helper((int)idx); else sdebug_do_add_host(true); } else { sdebug_do_add_host(false); } } while (--delta_hosts); } else if (delta_hosts < 0) { do { sdebug_do_remove_host(false); } while (++delta_hosts); } return count; } static DRIVER_ATTR_RW(add_host); static ssize_t vpd_use_hostno_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_vpd_use_hostno); } static ssize_t vpd_use_hostno_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_vpd_use_hostno = n; return count; } return -EINVAL; } static DRIVER_ATTR_RW(vpd_use_hostno); static ssize_t statistics_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", (int)sdebug_statistics); } static ssize_t statistics_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (sscanf(buf, "%d", &n) == 1) && (n >= 0)) { if (n > 0) sdebug_statistics = true; else { clear_queue_stats(); sdebug_statistics = false; } return count; } return -EINVAL; } static DRIVER_ATTR_RW(statistics); static ssize_t sector_size_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_sector_size); } static DRIVER_ATTR_RO(sector_size); static ssize_t submit_queues_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", submit_queues); } static DRIVER_ATTR_RO(submit_queues); static ssize_t dix_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dix); } static DRIVER_ATTR_RO(dix); static ssize_t dif_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_dif); } static DRIVER_ATTR_RO(dif); static ssize_t guard_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%u\n", sdebug_guard); } static DRIVER_ATTR_RO(guard); static ssize_t ato_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_ato); } static DRIVER_ATTR_RO(ato); static ssize_t map_show(struct device_driver *ddp, char *buf) { ssize_t count = 0; if (!scsi_debug_lbp()) return scnprintf(buf, PAGE_SIZE, "0-%u\n", sdebug_store_sectors); if (sdebug_fake_rw == 0 && !xa_empty(per_store_ap)) { struct sdeb_store_info *sip = xa_load(per_store_ap, 0); if (sip) count = scnprintf(buf, PAGE_SIZE - 1, "%*pbl", (int)map_size, sip->map_storep); } buf[count++] = '\n'; buf[count] = '\0'; return count; } static DRIVER_ATTR_RO(map); static ssize_t random_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_random); } static ssize_t random_store(struct device_driver *ddp, const char *buf, size_t count) { bool v; if (kstrtobool(buf, &v)) return -EINVAL; sdebug_random = v; return count; } static DRIVER_ATTR_RW(random); static ssize_t removable_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_removable ? 1 : 0); } static ssize_t removable_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_removable = (n > 0); return count; } return -EINVAL; } static DRIVER_ATTR_RW(removable); static ssize_t host_lock_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_host_lock); } /* N.B. sdebug_host_lock does nothing, kept for backward compatibility */ static ssize_t host_lock_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_host_lock = (n > 0); return count; } return -EINVAL; } static DRIVER_ATTR_RW(host_lock); static ssize_t strict_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_strict); } static ssize_t strict_store(struct device_driver *ddp, const char *buf, size_t count) { int n; if ((count > 0) && (1 == sscanf(buf, "%d", &n)) && (n >= 0)) { sdebug_strict = (n > 0); return count; } return -EINVAL; } static DRIVER_ATTR_RW(strict); static ssize_t uuid_ctl_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", !!sdebug_uuid_ctl); } static DRIVER_ATTR_RO(uuid_ctl); static ssize_t cdb_len_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdebug_cdb_len); } static ssize_t cdb_len_store(struct device_driver *ddp, const char *buf, size_t count) { int ret, n; ret = kstrtoint(buf, 0, &n); if (ret) return ret; sdebug_cdb_len = n; all_config_cdb_len(); return count; } static DRIVER_ATTR_RW(cdb_len); static const char * const zbc_model_strs_a[] = { [BLK_ZONED_NONE] = "none", [BLK_ZONED_HA] = "host-aware", [BLK_ZONED_HM] = "host-managed", }; static const char * const zbc_model_strs_b[] = { [BLK_ZONED_NONE] = "no", [BLK_ZONED_HA] = "aware", [BLK_ZONED_HM] = "managed", }; static const char * const zbc_model_strs_c[] = { [BLK_ZONED_NONE] = "0", [BLK_ZONED_HA] = "1", [BLK_ZONED_HM] = "2", }; static int sdeb_zbc_model_str(const char *cp) { int res = sysfs_match_string(zbc_model_strs_a, cp); if (res < 0) { res = sysfs_match_string(zbc_model_strs_b, cp); if (res < 0) { res = sysfs_match_string(zbc_model_strs_c, cp); if (res < 0) return -EINVAL; } } return res; } static ssize_t zbc_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%s\n", zbc_model_strs_a[sdeb_zbc_model]); } static DRIVER_ATTR_RO(zbc); static ssize_t tur_ms_to_ready_show(struct device_driver *ddp, char *buf) { return scnprintf(buf, PAGE_SIZE, "%d\n", sdeb_tur_ms_to_ready); } static DRIVER_ATTR_RO(tur_ms_to_ready); /* Note: The following array creates attribute files in the /sys/bus/pseudo/drivers/scsi_debug directory. The advantage of these files (over those found in the /sys/module/scsi_debug/parameters directory) is that auxiliary actions can be triggered when an attribute is changed. For example see: add_host_store() above. */ static struct attribute *sdebug_drv_attrs[] = { &driver_attr_delay.attr, &driver_attr_opts.attr, &driver_attr_ptype.attr, &driver_attr_dsense.attr, &driver_attr_fake_rw.attr, &driver_attr_host_max_queue.attr, &driver_attr_no_lun_0.attr, &driver_attr_num_tgts.attr, &driver_attr_dev_size_mb.attr, &driver_attr_num_parts.attr, &driver_attr_every_nth.attr, &driver_attr_lun_format.attr, &driver_attr_max_luns.attr, &driver_attr_max_queue.attr, &driver_attr_no_rwlock.attr, &driver_attr_no_uld.attr, &driver_attr_scsi_level.attr, &driver_attr_virtual_gb.attr, &driver_attr_add_host.attr, &driver_attr_per_host_store.attr, &driver_attr_vpd_use_hostno.attr, &driver_attr_sector_size.attr, &driver_attr_statistics.attr, &driver_attr_submit_queues.attr, &driver_attr_dix.attr, &driver_attr_dif.attr, &driver_attr_guard.attr, &driver_attr_ato.attr, &driver_attr_map.attr, &driver_attr_random.attr, &driver_attr_removable.attr, &driver_attr_host_lock.attr, &driver_attr_ndelay.attr, &driver_attr_strict.attr, &driver_attr_uuid_ctl.attr, &driver_attr_cdb_len.attr, &driver_attr_tur_ms_to_ready.attr, &driver_attr_zbc.attr, NULL, }; ATTRIBUTE_GROUPS(sdebug_drv); static struct device *pseudo_primary; static int __init scsi_debug_init(void) { bool want_store = (sdebug_fake_rw == 0); unsigned long sz; int k, ret, hosts_to_add; int idx = -1; if (sdebug_ndelay >= 1000 * 1000 * 1000) { pr_warn("ndelay must be less than 1 second, ignored\n"); sdebug_ndelay = 0; } else if (sdebug_ndelay > 0) sdebug_jdelay = JDELAY_OVERRIDDEN; switch (sdebug_sector_size) { case 512: case 1024: case 2048: case 4096: break; default: pr_err("invalid sector_size %d\n", sdebug_sector_size); return -EINVAL; } switch (sdebug_dif) { case T10_PI_TYPE0_PROTECTION: break; case T10_PI_TYPE1_PROTECTION: case T10_PI_TYPE2_PROTECTION: case T10_PI_TYPE3_PROTECTION: have_dif_prot = true; break; default: pr_err("dif must be 0, 1, 2 or 3\n"); return -EINVAL; } if (sdebug_num_tgts < 0) { pr_err("num_tgts must be >= 0\n"); return -EINVAL; } if (sdebug_guard > 1) { pr_err("guard must be 0 or 1\n"); return -EINVAL; } if (sdebug_ato > 1) { pr_err("ato must be 0 or 1\n"); return -EINVAL; } if (sdebug_physblk_exp > 15) { pr_err("invalid physblk_exp %u\n", sdebug_physblk_exp); return -EINVAL; } sdebug_lun_am = sdebug_lun_am_i; if (sdebug_lun_am > SAM_LUN_AM_FLAT) { pr_warn("Invalid LUN format %u, using default\n", (int)sdebug_lun_am); sdebug_lun_am = SAM_LUN_AM_PERIPHERAL; } if (sdebug_max_luns > 256) { if (sdebug_max_luns > 16384) { pr_warn("max_luns can be no more than 16384, use default\n"); sdebug_max_luns = DEF_MAX_LUNS; } sdebug_lun_am = SAM_LUN_AM_FLAT; } if (sdebug_lowest_aligned > 0x3fff) { pr_err("lowest_aligned too big: %u\n", sdebug_lowest_aligned); return -EINVAL; } if (submit_queues < 1) { pr_err("submit_queues must be 1 or more\n"); return -EINVAL; } if ((sdebug_max_queue > SDEBUG_CANQUEUE) || (sdebug_max_queue < 1)) { pr_err("max_queue must be in range [1, %d]\n", SDEBUG_CANQUEUE); return -EINVAL; } if ((sdebug_host_max_queue > SDEBUG_CANQUEUE) || (sdebug_host_max_queue < 0)) { pr_err("host_max_queue must be in range [0 %d]\n", SDEBUG_CANQUEUE); return -EINVAL; } if (sdebug_host_max_queue && (sdebug_max_queue != sdebug_host_max_queue)) { sdebug_max_queue = sdebug_host_max_queue; pr_warn("fixing max submit queue depth to host max queue depth, %d\n", sdebug_max_queue); } /* * check for host managed zoned block device specified with * ptype=0x14 or zbc=XXX. */ if (sdebug_ptype == TYPE_ZBC) { sdeb_zbc_model = BLK_ZONED_HM; } else if (sdeb_zbc_model_s && *sdeb_zbc_model_s) { k = sdeb_zbc_model_str(sdeb_zbc_model_s); if (k < 0) return k; sdeb_zbc_model = k; switch (sdeb_zbc_model) { case BLK_ZONED_NONE: case BLK_ZONED_HA: sdebug_ptype = TYPE_DISK; break; case BLK_ZONED_HM: sdebug_ptype = TYPE_ZBC; break; default: pr_err("Invalid ZBC model\n"); return -EINVAL; } } if (sdeb_zbc_model != BLK_ZONED_NONE) { sdeb_zbc_in_use = true; if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) sdebug_dev_size_mb = DEF_ZBC_DEV_SIZE_MB; } if (sdebug_dev_size_mb == DEF_DEV_SIZE_PRE_INIT) sdebug_dev_size_mb = DEF_DEV_SIZE_MB; if (sdebug_dev_size_mb < 1) sdebug_dev_size_mb = 1; /* force minimum 1 MB ramdisk */ sz = (unsigned long)sdebug_dev_size_mb * 1048576; sdebug_store_sectors = sz / sdebug_sector_size; sdebug_capacity = get_sdebug_capacity(); /* play around with geometry, don't waste too much on track 0 */ sdebug_heads = 8; sdebug_sectors_per = 32; if (sdebug_dev_size_mb >= 256) sdebug_heads = 64; else if (sdebug_dev_size_mb >= 16) sdebug_heads = 32; sdebug_cylinders_per = (unsigned long)sdebug_capacity / (sdebug_sectors_per * sdebug_heads); if (sdebug_cylinders_per >= 1024) { /* other LLDs do this; implies >= 1GB ram disk ... */ sdebug_heads = 255; sdebug_sectors_per = 63; sdebug_cylinders_per = (unsigned long)sdebug_capacity / (sdebug_sectors_per * sdebug_heads); } if (scsi_debug_lbp()) { sdebug_unmap_max_blocks = clamp(sdebug_unmap_max_blocks, 0U, 0xffffffffU); sdebug_unmap_max_desc = clamp(sdebug_unmap_max_desc, 0U, 256U); sdebug_unmap_granularity = clamp(sdebug_unmap_granularity, 1U, 0xffffffffU); if (sdebug_unmap_alignment && sdebug_unmap_granularity <= sdebug_unmap_alignment) { pr_err("ERR: unmap_granularity <= unmap_alignment\n"); return -EINVAL; } } xa_init_flags(per_store_ap, XA_FLAGS_ALLOC | XA_FLAGS_LOCK_IRQ); if (want_store) { idx = sdebug_add_store(); if (idx < 0) return idx; } pseudo_primary = root_device_register("pseudo_0"); if (IS_ERR(pseudo_primary)) { pr_warn("root_device_register() error\n"); ret = PTR_ERR(pseudo_primary); goto free_vm; } ret = bus_register(&pseudo_lld_bus); if (ret < 0) { pr_warn("bus_register error: %d\n", ret); goto dev_unreg; } ret = driver_register(&sdebug_driverfs_driver); if (ret < 0) { pr_warn("driver_register error: %d\n", ret); goto bus_unreg; } hosts_to_add = sdebug_add_host; sdebug_add_host = 0; queued_cmd_cache = KMEM_CACHE(sdebug_queued_cmd, SLAB_HWCACHE_ALIGN); if (!queued_cmd_cache) { ret = -ENOMEM; goto driver_unreg; } sdebug_debugfs_root = debugfs_create_dir("scsi_debug", NULL); if (IS_ERR_OR_NULL(sdebug_debugfs_root)) pr_info("%s: failed to create initial debugfs directory\n", __func__); for (k = 0; k < hosts_to_add; k++) { if (want_store && k == 0) { ret = sdebug_add_host_helper(idx); if (ret < 0) { pr_err("add_host_helper k=%d, error=%d\n", k, -ret); break; } } else { ret = sdebug_do_add_host(want_store && sdebug_per_host_store); if (ret < 0) { pr_err("add_host k=%d error=%d\n", k, -ret); break; } } } if (sdebug_verbose) pr_info("built %d host(s)\n", sdebug_num_hosts); return 0; driver_unreg: driver_unregister(&sdebug_driverfs_driver); bus_unreg: bus_unregister(&pseudo_lld_bus); dev_unreg: root_device_unregister(pseudo_primary); free_vm: sdebug_erase_store(idx, NULL); return ret; } static void __exit scsi_debug_exit(void) { int k = sdebug_num_hosts; for (; k; k--) sdebug_do_remove_host(true); kmem_cache_destroy(queued_cmd_cache); driver_unregister(&sdebug_driverfs_driver); bus_unregister(&pseudo_lld_bus); root_device_unregister(pseudo_primary); sdebug_erase_all_stores(false); xa_destroy(per_store_ap); debugfs_remove(sdebug_debugfs_root); } device_initcall(scsi_debug_init); module_exit(scsi_debug_exit); static void sdebug_release_adapter(struct device *dev) { struct sdebug_host_info *sdbg_host; sdbg_host = dev_to_sdebug_host(dev); kfree(sdbg_host); } /* idx must be valid, if sip is NULL then it will be obtained using idx */ static void sdebug_erase_store(int idx, struct sdeb_store_info *sip) { if (idx < 0) return; if (!sip) { if (xa_empty(per_store_ap)) return; sip = xa_load(per_store_ap, idx); if (!sip) return; } vfree(sip->map_storep); vfree(sip->dif_storep); vfree(sip->storep); xa_erase(per_store_ap, idx); kfree(sip); } /* Assume apart_from_first==false only in shutdown case. */ static void sdebug_erase_all_stores(bool apart_from_first) { unsigned long idx; struct sdeb_store_info *sip = NULL; xa_for_each(per_store_ap, idx, sip) { if (apart_from_first) apart_from_first = false; else sdebug_erase_store(idx, sip); } if (apart_from_first) sdeb_most_recent_idx = sdeb_first_idx; } /* * Returns store xarray new element index (idx) if >=0 else negated errno. * Limit the number of stores to 65536. */ static int sdebug_add_store(void) { int res; u32 n_idx; unsigned long iflags; unsigned long sz = (unsigned long)sdebug_dev_size_mb * 1048576; struct sdeb_store_info *sip = NULL; struct xa_limit xal = { .max = 1 << 16, .min = 0 }; sip = kzalloc(sizeof(*sip), GFP_KERNEL); if (!sip) return -ENOMEM; xa_lock_irqsave(per_store_ap, iflags); res = __xa_alloc(per_store_ap, &n_idx, sip, xal, GFP_ATOMIC); if (unlikely(res < 0)) { xa_unlock_irqrestore(per_store_ap, iflags); kfree(sip); pr_warn("%s: xa_alloc() errno=%d\n", __func__, -res); return res; } sdeb_most_recent_idx = n_idx; if (sdeb_first_idx < 0) sdeb_first_idx = n_idx; xa_unlock_irqrestore(per_store_ap, iflags); res = -ENOMEM; sip->storep = vzalloc(sz); if (!sip->storep) { pr_err("user data oom\n"); goto err; } if (sdebug_num_parts > 0) sdebug_build_parts(sip->storep, sz); /* DIF/DIX: what T10 calls Protection Information (PI) */ if (sdebug_dix) { int dif_size; dif_size = sdebug_store_sectors * sizeof(struct t10_pi_tuple); sip->dif_storep = vmalloc(dif_size); pr_info("dif_storep %u bytes @ %pK\n", dif_size, sip->dif_storep); if (!sip->dif_storep) { pr_err("DIX oom\n"); goto err; } memset(sip->dif_storep, 0xff, dif_size); } /* Logical Block Provisioning */ if (scsi_debug_lbp()) { map_size = lba_to_map_index(sdebug_store_sectors - 1) + 1; sip->map_storep = vmalloc(array_size(sizeof(long), BITS_TO_LONGS(map_size))); pr_info("%lu provisioning blocks\n", map_size); if (!sip->map_storep) { pr_err("LBP map oom\n"); goto err; } bitmap_zero(sip->map_storep, map_size); /* Map first 1KB for partition table */ if (sdebug_num_parts) map_region(sip, 0, 2); } rwlock_init(&sip->macc_lck); return (int)n_idx; err: sdebug_erase_store((int)n_idx, sip); pr_warn("%s: failed, errno=%d\n", __func__, -res); return res; } static int sdebug_add_host_helper(int per_host_idx) { int k, devs_per_host, idx; int error = -ENOMEM; struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *sdbg_devinfo, *tmp; sdbg_host = kzalloc(sizeof(*sdbg_host), GFP_KERNEL); if (!sdbg_host) return -ENOMEM; idx = (per_host_idx < 0) ? sdeb_first_idx : per_host_idx; if (xa_get_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE)) xa_clear_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); sdbg_host->si_idx = idx; INIT_LIST_HEAD(&sdbg_host->dev_info_list); devs_per_host = sdebug_num_tgts * sdebug_max_luns; for (k = 0; k < devs_per_host; k++) { sdbg_devinfo = sdebug_device_create(sdbg_host, GFP_KERNEL); if (!sdbg_devinfo) goto clean; } mutex_lock(&sdebug_host_list_mutex); list_add_tail(&sdbg_host->host_list, &sdebug_host_list); mutex_unlock(&sdebug_host_list_mutex); sdbg_host->dev.bus = &pseudo_lld_bus; sdbg_host->dev.parent = pseudo_primary; sdbg_host->dev.release = &sdebug_release_adapter; dev_set_name(&sdbg_host->dev, "adapter%d", sdebug_num_hosts); error = device_register(&sdbg_host->dev); if (error) { mutex_lock(&sdebug_host_list_mutex); list_del(&sdbg_host->host_list); mutex_unlock(&sdebug_host_list_mutex); goto clean; } ++sdebug_num_hosts; return 0; clean: list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, dev_list) { list_del(&sdbg_devinfo->dev_list); kfree(sdbg_devinfo->zstate); kfree(sdbg_devinfo); } if (sdbg_host->dev.release) put_device(&sdbg_host->dev); else kfree(sdbg_host); pr_warn("%s: failed, errno=%d\n", __func__, -error); return error; } static int sdebug_do_add_host(bool mk_new_store) { int ph_idx = sdeb_most_recent_idx; if (mk_new_store) { ph_idx = sdebug_add_store(); if (ph_idx < 0) return ph_idx; } return sdebug_add_host_helper(ph_idx); } static void sdebug_do_remove_host(bool the_end) { int idx = -1; struct sdebug_host_info *sdbg_host = NULL; struct sdebug_host_info *sdbg_host2; mutex_lock(&sdebug_host_list_mutex); if (!list_empty(&sdebug_host_list)) { sdbg_host = list_entry(sdebug_host_list.prev, struct sdebug_host_info, host_list); idx = sdbg_host->si_idx; } if (!the_end && idx >= 0) { bool unique = true; list_for_each_entry(sdbg_host2, &sdebug_host_list, host_list) { if (sdbg_host2 == sdbg_host) continue; if (idx == sdbg_host2->si_idx) { unique = false; break; } } if (unique) { xa_set_mark(per_store_ap, idx, SDEB_XA_NOT_IN_USE); if (idx == sdeb_most_recent_idx) --sdeb_most_recent_idx; } } if (sdbg_host) list_del(&sdbg_host->host_list); mutex_unlock(&sdebug_host_list_mutex); if (!sdbg_host) return; device_unregister(&sdbg_host->dev); --sdebug_num_hosts; } static int sdebug_change_qdepth(struct scsi_device *sdev, int qdepth) { struct sdebug_dev_info *devip = sdev->hostdata; if (!devip) return -ENODEV; mutex_lock(&sdebug_host_list_mutex); block_unblock_all_queues(true); if (qdepth > SDEBUG_CANQUEUE) { qdepth = SDEBUG_CANQUEUE; pr_warn("%s: requested qdepth [%d] exceeds canqueue [%d], trim\n", __func__, qdepth, SDEBUG_CANQUEUE); } if (qdepth < 1) qdepth = 1; if (qdepth != sdev->queue_depth) scsi_change_queue_depth(sdev, qdepth); block_unblock_all_queues(false); mutex_unlock(&sdebug_host_list_mutex); if (SDEBUG_OPT_Q_NOISE & sdebug_opts) sdev_printk(KERN_INFO, sdev, "%s: qdepth=%d\n", __func__, qdepth); return sdev->queue_depth; } static bool fake_timeout(struct scsi_cmnd *scp) { if (0 == (atomic_read(&sdebug_cmnd_count) % abs(sdebug_every_nth))) { if (sdebug_every_nth < -1) sdebug_every_nth = -1; if (SDEBUG_OPT_TIMEOUT & sdebug_opts) return true; /* ignore command causing timeout */ else if (SDEBUG_OPT_MAC_TIMEOUT & sdebug_opts && scsi_medium_access_command(scp)) return true; /* time out reads and writes */ } return false; } /* Response to TUR or media access command when device stopped */ static int resp_not_ready(struct scsi_cmnd *scp, struct sdebug_dev_info *devip) { int stopped_state; u64 diff_ns = 0; ktime_t now_ts = ktime_get_boottime(); struct scsi_device *sdp = scp->device; stopped_state = atomic_read(&devip->stopped); if (stopped_state == 2) { if (ktime_to_ns(now_ts) > ktime_to_ns(devip->create_ts)) { diff_ns = ktime_to_ns(ktime_sub(now_ts, devip->create_ts)); if (diff_ns >= ((u64)sdeb_tur_ms_to_ready * 1000000)) { /* tur_ms_to_ready timer extinguished */ atomic_set(&devip->stopped, 0); return 0; } } mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x1); if (sdebug_verbose) sdev_printk(KERN_INFO, sdp, "%s: Not ready: in process of becoming ready\n", my_name); if (scp->cmnd[0] == TEST_UNIT_READY) { u64 tur_nanosecs_to_ready = (u64)sdeb_tur_ms_to_ready * 1000000; if (diff_ns <= tur_nanosecs_to_ready) diff_ns = tur_nanosecs_to_ready - diff_ns; else diff_ns = tur_nanosecs_to_ready; /* As per 20-061r2 approved for spc6 by T10 on 20200716 */ do_div(diff_ns, 1000000); /* diff_ns becomes milliseconds */ scsi_set_sense_information(scp->sense_buffer, SCSI_SENSE_BUFFERSIZE, diff_ns); return check_condition_result; } } mk_sense_buffer(scp, NOT_READY, LOGICAL_UNIT_NOT_READY, 0x2); if (sdebug_verbose) sdev_printk(KERN_INFO, sdp, "%s: Not ready: initializing command required\n", my_name); return check_condition_result; } static void sdebug_map_queues(struct Scsi_Host *shost) { int i, qoff; if (shost->nr_hw_queues == 1) return; for (i = 0, qoff = 0; i < HCTX_MAX_TYPES; i++) { struct blk_mq_queue_map *map = &shost->tag_set.map[i]; map->nr_queues = 0; if (i == HCTX_TYPE_DEFAULT) map->nr_queues = submit_queues - poll_queues; else if (i == HCTX_TYPE_POLL) map->nr_queues = poll_queues; if (!map->nr_queues) { BUG_ON(i == HCTX_TYPE_DEFAULT); continue; } map->queue_offset = qoff; blk_mq_map_queues(map); qoff += map->nr_queues; } } struct sdebug_blk_mq_poll_data { unsigned int queue_num; int *num_entries; }; /* * We don't handle aborted commands here, but it does not seem possible to have * aborted polled commands from schedule_resp() */ static bool sdebug_blk_mq_poll_iter(struct request *rq, void *opaque) { struct sdebug_blk_mq_poll_data *data = opaque; struct scsi_cmnd *cmd = blk_mq_rq_to_pdu(rq); struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd); struct sdebug_defer *sd_dp; u32 unique_tag = blk_mq_unique_tag(rq); u16 hwq = blk_mq_unique_tag_to_hwq(unique_tag); struct sdebug_queued_cmd *sqcp; unsigned long flags; int queue_num = data->queue_num; ktime_t time; /* We're only interested in one queue for this iteration */ if (hwq != queue_num) return true; /* Subsequent checks would fail if this failed, but check anyway */ if (!test_bit(SCMD_STATE_INFLIGHT, &cmd->state)) return true; time = ktime_get_boottime(); spin_lock_irqsave(&sdsc->lock, flags); sqcp = TO_QUEUED_CMD(cmd); if (!sqcp) { spin_unlock_irqrestore(&sdsc->lock, flags); return true; } sd_dp = &sqcp->sd_dp; if (READ_ONCE(sd_dp->defer_t) != SDEB_DEFER_POLL) { spin_unlock_irqrestore(&sdsc->lock, flags); return true; } if (time < sd_dp->cmpl_ts) { spin_unlock_irqrestore(&sdsc->lock, flags); return true; } ASSIGN_QUEUED_CMD(cmd, NULL); spin_unlock_irqrestore(&sdsc->lock, flags); if (sdebug_statistics) { atomic_inc(&sdebug_completions); if (raw_smp_processor_id() != sd_dp->issuing_cpu) atomic_inc(&sdebug_miss_cpus); } sdebug_free_queued_cmd(sqcp); scsi_done(cmd); /* callback to mid level */ (*data->num_entries)++; return true; } static int sdebug_blk_mq_poll(struct Scsi_Host *shost, unsigned int queue_num) { int num_entries = 0; struct sdebug_blk_mq_poll_data data = { .queue_num = queue_num, .num_entries = &num_entries, }; blk_mq_tagset_busy_iter(&shost->tag_set, sdebug_blk_mq_poll_iter, &data); if (num_entries > 0) atomic_add(num_entries, &sdeb_mq_poll_count); return num_entries; } static int sdebug_timeout_cmd(struct scsi_cmnd *cmnd) { struct scsi_device *sdp = cmnd->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; unsigned char *cmd = cmnd->cmnd; int ret = 0; if (devip == NULL) return 0; rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == ERR_TMOUT_CMD && (err->cmd == cmd[0] || err->cmd == 0xff)) { ret = !!err->cnt; if (err->cnt < 0) err->cnt++; rcu_read_unlock(); return ret; } } rcu_read_unlock(); return 0; } static int sdebug_fail_queue_cmd(struct scsi_cmnd *cmnd) { struct scsi_device *sdp = cmnd->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; unsigned char *cmd = cmnd->cmnd; int ret = 0; if (devip == NULL) return 0; rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == ERR_FAIL_QUEUE_CMD && (err->cmd == cmd[0] || err->cmd == 0xff)) { ret = err->cnt ? err->queuecmd_ret : 0; if (err->cnt < 0) err->cnt++; rcu_read_unlock(); return ret; } } rcu_read_unlock(); return 0; } static int sdebug_fail_cmd(struct scsi_cmnd *cmnd, int *retval, struct sdebug_err_inject *info) { struct scsi_device *sdp = cmnd->device; struct sdebug_dev_info *devip = (struct sdebug_dev_info *)sdp->hostdata; struct sdebug_err_inject *err; unsigned char *cmd = cmnd->cmnd; int ret = 0; int result; if (devip == NULL) return 0; rcu_read_lock(); list_for_each_entry_rcu(err, &devip->inject_err_list, list) { if (err->type == ERR_FAIL_CMD && (err->cmd == cmd[0] || err->cmd == 0xff)) { if (!err->cnt) { rcu_read_unlock(); return 0; } ret = !!err->cnt; rcu_read_unlock(); goto out_handle; } } rcu_read_unlock(); return 0; out_handle: if (err->cnt < 0) err->cnt++; mk_sense_buffer(cmnd, err->sense_key, err->asc, err->asq); result = err->status_byte | err->host_byte << 16 | err->driver_byte << 24; *info = *err; *retval = schedule_resp(cmnd, devip, result, NULL, 0, 0); return ret; } static int scsi_debug_queuecommand(struct Scsi_Host *shost, struct scsi_cmnd *scp) { u8 sdeb_i; struct scsi_device *sdp = scp->device; const struct opcode_info_t *oip; const struct opcode_info_t *r_oip; struct sdebug_dev_info *devip; u8 *cmd = scp->cmnd; int (*r_pfp)(struct scsi_cmnd *, struct sdebug_dev_info *); int (*pfp)(struct scsi_cmnd *, struct sdebug_dev_info *) = NULL; int k, na; int errsts = 0; u64 lun_index = sdp->lun & 0x3FFF; u32 flags; u16 sa; u8 opcode = cmd[0]; bool has_wlun_rl; bool inject_now; int ret = 0; struct sdebug_err_inject err; scsi_set_resid(scp, 0); if (sdebug_statistics) { atomic_inc(&sdebug_cmnd_count); inject_now = inject_on_this_cmd(); } else { inject_now = false; } if (unlikely(sdebug_verbose && !(SDEBUG_OPT_NO_CDB_NOISE & sdebug_opts))) { char b[120]; int n, len, sb; len = scp->cmd_len; sb = (int)sizeof(b); if (len > 32) strcpy(b, "too long, over 32 bytes"); else { for (k = 0, n = 0; k < len && n < sb; ++k) n += scnprintf(b + n, sb - n, "%02x ", (u32)cmd[k]); } sdev_printk(KERN_INFO, sdp, "%s: tag=%#x, cmd %s\n", my_name, blk_mq_unique_tag(scsi_cmd_to_rq(scp)), b); } if (unlikely(inject_now && (sdebug_opts & SDEBUG_OPT_HOST_BUSY))) return SCSI_MLQUEUE_HOST_BUSY; has_wlun_rl = (sdp->lun == SCSI_W_LUN_REPORT_LUNS); if (unlikely(lun_index >= sdebug_max_luns && !has_wlun_rl)) goto err_out; sdeb_i = opcode_ind_arr[opcode]; /* fully mapped */ oip = &opcode_info_arr[sdeb_i]; /* safe if table consistent */ devip = (struct sdebug_dev_info *)sdp->hostdata; if (unlikely(!devip)) { devip = find_build_dev_info(sdp); if (NULL == devip) goto err_out; } if (sdebug_timeout_cmd(scp)) { scmd_printk(KERN_INFO, scp, "timeout command 0x%x\n", opcode); return 0; } ret = sdebug_fail_queue_cmd(scp); if (ret) { scmd_printk(KERN_INFO, scp, "fail queue command 0x%x with 0x%x\n", opcode, ret); return ret; } if (sdebug_fail_cmd(scp, &ret, &err)) { scmd_printk(KERN_INFO, scp, "fail command 0x%x with hostbyte=0x%x, " "driverbyte=0x%x, statusbyte=0x%x, " "sense_key=0x%x, asc=0x%x, asq=0x%x\n", opcode, err.host_byte, err.driver_byte, err.status_byte, err.sense_key, err.asc, err.asq); return ret; } if (unlikely(inject_now && !atomic_read(&sdeb_inject_pending))) atomic_set(&sdeb_inject_pending, 1); na = oip->num_attached; r_pfp = oip->pfp; if (na) { /* multiple commands with this opcode */ r_oip = oip; if (FF_SA & r_oip->flags) { if (F_SA_LOW & oip->flags) sa = 0x1f & cmd[1]; else sa = get_unaligned_be16(cmd + 8); for (k = 0; k <= na; oip = r_oip->arrp + k++) { if (opcode == oip->opcode && sa == oip->sa) break; } } else { /* since no service action only check opcode */ for (k = 0; k <= na; oip = r_oip->arrp + k++) { if (opcode == oip->opcode) break; } } if (k > na) { if (F_SA_LOW & r_oip->flags) mk_sense_invalid_fld(scp, SDEB_IN_CDB, 1, 4); else if (F_SA_HIGH & r_oip->flags) mk_sense_invalid_fld(scp, SDEB_IN_CDB, 8, 7); else mk_sense_invalid_opcode(scp); goto check_cond; } } /* else (when na==0) we assume the oip is a match */ flags = oip->flags; if (unlikely(F_INV_OP & flags)) { mk_sense_invalid_opcode(scp); goto check_cond; } if (unlikely(has_wlun_rl && !(F_RL_WLUN_OK & flags))) { if (sdebug_verbose) sdev_printk(KERN_INFO, sdp, "%s: Opcode 0x%x not%s\n", my_name, opcode, " supported for wlun"); mk_sense_invalid_opcode(scp); goto check_cond; } if (unlikely(sdebug_strict)) { /* check cdb against mask */ u8 rem; int j; for (k = 1; k < oip->len_mask[0] && k < 16; ++k) { rem = ~oip->len_mask[k] & cmd[k]; if (rem) { for (j = 7; j >= 0; --j, rem <<= 1) { if (0x80 & rem) break; } mk_sense_invalid_fld(scp, SDEB_IN_CDB, k, j); goto check_cond; } } } if (unlikely(!(F_SKIP_UA & flags) && find_first_bit(devip->uas_bm, SDEBUG_NUM_UAS) != SDEBUG_NUM_UAS)) { errsts = make_ua(scp, devip); if (errsts) goto check_cond; } if (unlikely(((F_M_ACCESS & flags) || scp->cmnd[0] == TEST_UNIT_READY) && atomic_read(&devip->stopped))) { errsts = resp_not_ready(scp, devip); if (errsts) goto fini; } if (sdebug_fake_rw && (F_FAKE_RW & flags)) goto fini; if (unlikely(sdebug_every_nth)) { if (fake_timeout(scp)) return 0; /* ignore command: make trouble */ } if (likely(oip->pfp)) pfp = oip->pfp; /* calls a resp_* function */ else pfp = r_pfp; /* if leaf function ptr NULL, try the root's */ fini: if (F_DELAY_OVERR & flags) /* cmds like INQUIRY respond asap */ return schedule_resp(scp, devip, errsts, pfp, 0, 0); else if ((flags & F_LONG_DELAY) && (sdebug_jdelay > 0 || sdebug_ndelay > 10000)) { /* * Skip long delays if ndelay <= 10 microseconds. Otherwise * for Start Stop Unit (SSU) want at least 1 second delay and * if sdebug_jdelay>1 want a long delay of that many seconds. * For Synchronize Cache want 1/20 of SSU's delay. */ int jdelay = (sdebug_jdelay < 2) ? 1 : sdebug_jdelay; int denom = (flags & F_SYNC_DELAY) ? 20 : 1; jdelay = mult_frac(USER_HZ * jdelay, HZ, denom * USER_HZ); return schedule_resp(scp, devip, errsts, pfp, jdelay, 0); } else return schedule_resp(scp, devip, errsts, pfp, sdebug_jdelay, sdebug_ndelay); check_cond: return schedule_resp(scp, devip, check_condition_result, NULL, 0, 0); err_out: return schedule_resp(scp, NULL, DID_NO_CONNECT << 16, NULL, 0, 0); } static int sdebug_init_cmd_priv(struct Scsi_Host *shost, struct scsi_cmnd *cmd) { struct sdebug_scsi_cmd *sdsc = scsi_cmd_priv(cmd); spin_lock_init(&sdsc->lock); return 0; } static struct scsi_host_template sdebug_driver_template = { .show_info = scsi_debug_show_info, .write_info = scsi_debug_write_info, .proc_name = sdebug_proc_name, .name = "SCSI DEBUG", .info = scsi_debug_info, .slave_alloc = scsi_debug_slave_alloc, .slave_configure = scsi_debug_slave_configure, .slave_destroy = scsi_debug_slave_destroy, .ioctl = scsi_debug_ioctl, .queuecommand = scsi_debug_queuecommand, .change_queue_depth = sdebug_change_qdepth, .map_queues = sdebug_map_queues, .mq_poll = sdebug_blk_mq_poll, .eh_abort_handler = scsi_debug_abort, .eh_device_reset_handler = scsi_debug_device_reset, .eh_target_reset_handler = scsi_debug_target_reset, .eh_bus_reset_handler = scsi_debug_bus_reset, .eh_host_reset_handler = scsi_debug_host_reset, .can_queue = SDEBUG_CANQUEUE, .this_id = 7, .sg_tablesize = SG_MAX_SEGMENTS, .cmd_per_lun = DEF_CMD_PER_LUN, .max_sectors = -1U, .max_segment_size = -1U, .module = THIS_MODULE, .track_queue_depth = 1, .cmd_size = sizeof(struct sdebug_scsi_cmd), .init_cmd_priv = sdebug_init_cmd_priv, .target_alloc = sdebug_target_alloc, .target_destroy = sdebug_target_destroy, }; static int sdebug_driver_probe(struct device *dev) { int error = 0; struct sdebug_host_info *sdbg_host; struct Scsi_Host *hpnt; int hprot; sdbg_host = dev_to_sdebug_host(dev); sdebug_driver_template.can_queue = sdebug_max_queue; sdebug_driver_template.cmd_per_lun = sdebug_max_queue; if (!sdebug_clustering) sdebug_driver_template.dma_boundary = PAGE_SIZE - 1; hpnt = scsi_host_alloc(&sdebug_driver_template, 0); if (NULL == hpnt) { pr_err("scsi_host_alloc failed\n"); error = -ENODEV; return error; } if (submit_queues > nr_cpu_ids) { pr_warn("%s: trim submit_queues (was %d) to nr_cpu_ids=%u\n", my_name, submit_queues, nr_cpu_ids); submit_queues = nr_cpu_ids; } /* * Decide whether to tell scsi subsystem that we want mq. The * following should give the same answer for each host. */ hpnt->nr_hw_queues = submit_queues; if (sdebug_host_max_queue) hpnt->host_tagset = 1; /* poll queues are possible for nr_hw_queues > 1 */ if (hpnt->nr_hw_queues == 1 || (poll_queues < 1)) { pr_warn("%s: trim poll_queues to 0. poll_q/nr_hw = (%d/%d)\n", my_name, poll_queues, hpnt->nr_hw_queues); poll_queues = 0; } /* * Poll queues don't need interrupts, but we need at least one I/O queue * left over for non-polled I/O. * If condition not met, trim poll_queues to 1 (just for simplicity). */ if (poll_queues >= submit_queues) { if (submit_queues < 3) pr_warn("%s: trim poll_queues to 1\n", my_name); else pr_warn("%s: trim poll_queues to 1. Perhaps try poll_queues=%d\n", my_name, submit_queues - 1); poll_queues = 1; } if (poll_queues) hpnt->nr_maps = 3; sdbg_host->shost = hpnt; if ((hpnt->this_id >= 0) && (sdebug_num_tgts > hpnt->this_id)) hpnt->max_id = sdebug_num_tgts + 1; else hpnt->max_id = sdebug_num_tgts; /* = sdebug_max_luns; */ hpnt->max_lun = SCSI_W_LUN_REPORT_LUNS + 1; hprot = 0; switch (sdebug_dif) { case T10_PI_TYPE1_PROTECTION: hprot = SHOST_DIF_TYPE1_PROTECTION; if (sdebug_dix) hprot |= SHOST_DIX_TYPE1_PROTECTION; break; case T10_PI_TYPE2_PROTECTION: hprot = SHOST_DIF_TYPE2_PROTECTION; if (sdebug_dix) hprot |= SHOST_DIX_TYPE2_PROTECTION; break; case T10_PI_TYPE3_PROTECTION: hprot = SHOST_DIF_TYPE3_PROTECTION; if (sdebug_dix) hprot |= SHOST_DIX_TYPE3_PROTECTION; break; default: if (sdebug_dix) hprot |= SHOST_DIX_TYPE0_PROTECTION; break; } scsi_host_set_prot(hpnt, hprot); if (have_dif_prot || sdebug_dix) pr_info("host protection%s%s%s%s%s%s%s\n", (hprot & SHOST_DIF_TYPE1_PROTECTION) ? " DIF1" : "", (hprot & SHOST_DIF_TYPE2_PROTECTION) ? " DIF2" : "", (hprot & SHOST_DIF_TYPE3_PROTECTION) ? " DIF3" : "", (hprot & SHOST_DIX_TYPE0_PROTECTION) ? " DIX0" : "", (hprot & SHOST_DIX_TYPE1_PROTECTION) ? " DIX1" : "", (hprot & SHOST_DIX_TYPE2_PROTECTION) ? " DIX2" : "", (hprot & SHOST_DIX_TYPE3_PROTECTION) ? " DIX3" : ""); if (sdebug_guard == 1) scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_IP); else scsi_host_set_guard(hpnt, SHOST_DIX_GUARD_CRC); sdebug_verbose = !!(SDEBUG_OPT_NOISE & sdebug_opts); sdebug_any_injecting_opt = !!(SDEBUG_OPT_ALL_INJECTING & sdebug_opts); if (sdebug_every_nth) /* need stats counters for every_nth */ sdebug_statistics = true; error = scsi_add_host(hpnt, &sdbg_host->dev); if (error) { pr_err("scsi_add_host failed\n"); error = -ENODEV; scsi_host_put(hpnt); } else { scsi_scan_host(hpnt); } return error; } static void sdebug_driver_remove(struct device *dev) { struct sdebug_host_info *sdbg_host; struct sdebug_dev_info *sdbg_devinfo, *tmp; sdbg_host = dev_to_sdebug_host(dev); scsi_remove_host(sdbg_host->shost); list_for_each_entry_safe(sdbg_devinfo, tmp, &sdbg_host->dev_info_list, dev_list) { list_del(&sdbg_devinfo->dev_list); kfree(sdbg_devinfo->zstate); kfree(sdbg_devinfo); } scsi_host_put(sdbg_host->shost); } static struct bus_type pseudo_lld_bus = { .name = "pseudo", .probe = sdebug_driver_probe, .remove = sdebug_driver_remove, .drv_groups = sdebug_drv_groups, };
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