cregit-Linux how code gets into the kernel

Release 4.17 include/scsi/scsi_device.h

Directory: include/scsi
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _SCSI_SCSI_DEVICE_H

#define _SCSI_SCSI_DEVICE_H

#include <linux/list.h>
#include <linux/spinlock.h>
#include <linux/workqueue.h>
#include <linux/blkdev.h>
#include <scsi/scsi.h>
#include <linux/atomic.h>

struct device;
struct request_queue;
struct scsi_cmnd;
struct scsi_lun;
struct scsi_sense_hdr;


typedef unsigned int __bitwise blist_flags_t;


struct scsi_mode_data {
	
__u32	length;
	
__u16	block_descriptor_length;
	
__u8	medium_type;
	
__u8	device_specific;
	
__u8	header_length;
	
__u8	longlba:1;
};

/*
 * sdev state: If you alter this, you also need to alter scsi_sysfs.c
 * (for the ascii descriptions) and the state model enforcer:
 * scsi_lib:scsi_device_set_state().
 */

enum scsi_device_state {
	
SDEV_CREATED = 1,	/* device created but not added to sysfs
                                 * Only internal commands allowed (for inq) */
	
SDEV_RUNNING,		/* device properly configured
                                 * All commands allowed */
	
SDEV_CANCEL,		/* beginning to delete device
                                 * Only error handler commands allowed */
	
SDEV_DEL,		/* device deleted 
                                 * no commands allowed */
	
SDEV_QUIESCE,		/* Device quiescent.  No block commands
                                 * will be accepted, only specials (which
                                 * originate in the mid-layer) */
	
SDEV_OFFLINE,		/* Device offlined (by error handling or
                                 * user request */
	
SDEV_TRANSPORT_OFFLINE,	/* Offlined by transport class error handler */
	
SDEV_BLOCK,		/* Device blocked by scsi lld.  No
                                 * scsi commands from user or midlayer
                                 * should be issued to the scsi
                                 * lld. */
	
SDEV_CREATED_BLOCK,	/* same as above but for created devices */
};


enum scsi_scan_mode {
	
SCSI_SCAN_INITIAL = 0,
	
SCSI_SCAN_RESCAN,
	
SCSI_SCAN_MANUAL,
};


enum scsi_device_event {
	
SDEV_EVT_MEDIA_CHANGE	= 1,	/* media has changed */
	
SDEV_EVT_INQUIRY_CHANGE_REPORTED,		/* 3F 03  UA reported */
	
SDEV_EVT_CAPACITY_CHANGE_REPORTED,		/* 2A 09  UA reported */
	
SDEV_EVT_SOFT_THRESHOLD_REACHED_REPORTED,	/* 38 07  UA reported */
	
SDEV_EVT_MODE_PARAMETER_CHANGE_REPORTED,	/* 2A 01  UA reported */
	
SDEV_EVT_LUN_CHANGE_REPORTED,			/* 3F 0E  UA reported */
	
SDEV_EVT_ALUA_STATE_CHANGE_REPORTED,		/* 2A 06  UA reported */
	
SDEV_EVT_POWER_ON_RESET_OCCURRED,		/* 29 00  UA reported */

	
SDEV_EVT_FIRST		= SDEV_EVT_MEDIA_CHANGE,
	
SDEV_EVT_LAST		= SDEV_EVT_POWER_ON_RESET_OCCURRED,

	
SDEV_EVT_MAXBITS	= SDEV_EVT_LAST + 1
};


struct scsi_event {
	
enum scsi_device_event	evt_type;
	
struct list_head	node;

	/* put union of data structures, for non-simple event types,
         * here
         */
};

/**
 * struct scsi_vpd - SCSI Vital Product Data
 * @rcu: For kfree_rcu().
 * @len: Length in bytes of @data.
 * @data: VPD data as defined in various T10 SCSI standard documents.
 */

struct scsi_vpd {
	
struct rcu_head	rcu;
	
int		len;
	
unsigned char	data[];
};


struct scsi_device {
	
struct Scsi_Host *host;
	
struct request_queue *request_queue;

	/* the next two are protected by the host->host_lock */
	
struct list_head    siblings;   /* list of all devices on this host */
	
struct list_head    same_target_siblings; /* just the devices sharing same target id */

	
atomic_t device_busy;		/* commands actually active on LLDD */
	
atomic_t device_blocked;	/* Device returned QUEUE_FULL. */

	
spinlock_t list_lock;
	
struct list_head cmd_list;	/* queue of in use SCSI Command structures */
	
struct list_head starved_entry;
	
unsigned short queue_depth;	/* How deep of a queue we want */
	
unsigned short max_queue_depth;	/* max queue depth */
	
unsigned short last_queue_full_depth; /* These two are used by */
	
unsigned short last_queue_full_count; /* scsi_track_queue_full() */
	
unsigned long last_queue_full_time;	/* last queue full time */
	
unsigned long queue_ramp_up_period;	/* ramp up period in jiffies */

#define SCSI_DEFAULT_RAMP_UP_PERIOD	(120 * HZ)

	
unsigned long last_queue_ramp_up;	/* last queue ramp up time */

	

unsigned int id, channel;
	
u64 lun;
	
unsigned int manufacturer;	/* Manufacturer of device, for using 
                                         * vendor-specific cmd's */
	
unsigned sector_size;	/* size in bytes */

	
void *hostdata;		/* available to low-level driver */
	
unsigned char type;
	
char scsi_level;
	
char inq_periph_qual;	/* PQ from INQUIRY data */	
	
struct mutex inquiry_mutex;
	
unsigned char inquiry_len;	/* valid bytes in 'inquiry' */
	
unsigned char * inquiry;	/* INQUIRY response data */
	
const char * vendor;		/* [back_compat] point into 'inquiry' ... */
	
const char * model;		/* ... after scan; point to static string */
	
const char * rev;		/* ... "nullnullnullnull" before scan */


#define SCSI_VPD_PG_LEN                255
	
struct scsi_vpd __rcu *vpd_pg83;
	
struct scsi_vpd __rcu *vpd_pg80;
	
unsigned char current_tag;	/* current tag */
	
struct scsi_target      *sdev_target;   /* used only for single_lun */

	
blist_flags_t		sdev_bflags; /* black/white flags as also found in
                                 * scsi_devinfo.[hc]. For now used only to
                                 * pass settings from slave_alloc to scsi
                                 * core. */
	
unsigned int eh_timeout; /* Error handling timeout */
	
unsigned removable:1;
	
unsigned changed:1;	/* Data invalid due to media change */
	
unsigned busy:1;	/* Used to prevent races */
	
unsigned lockable:1;	/* Able to prevent media removal */
	
unsigned locked:1;      /* Media removal disabled */
	
unsigned borken:1;	/* Tell the Seagate driver to be 
                                 * painfully slow on this device */
	
unsigned disconnect:1;	/* can disconnect */
	
unsigned soft_reset:1;	/* Uses soft reset option */
	
unsigned sdtr:1;	/* Device supports SDTR messages */
	
unsigned wdtr:1;	/* Device supports WDTR messages */
	
unsigned ppr:1;		/* Device supports PPR messages */
	
unsigned tagged_supported:1;	/* Supports SCSI-II tagged queuing */
	
unsigned simple_tags:1;	/* simple queue tag messages are enabled */
	
unsigned was_reset:1;	/* There was a bus reset on the bus for 
                                 * this device */
	
unsigned expecting_cc_ua:1; /* Expecting a CHECK_CONDITION/UNIT_ATTN
                                     * because we did a bus reset. */
	
unsigned use_10_for_rw:1; /* first try 10-byte read / write */
	
unsigned use_10_for_ms:1; /* first try 10-byte mode sense/select */
	
unsigned no_report_opcodes:1;	/* no REPORT SUPPORTED OPERATION CODES */
	
unsigned no_write_same:1;	/* no WRITE SAME command */
	
unsigned use_16_for_rw:1; /* Use read/write(16) over read/write(10) */
	
unsigned skip_ms_page_8:1;	/* do not use MODE SENSE page 0x08 */
	
unsigned skip_ms_page_3f:1;	/* do not use MODE SENSE page 0x3f */
	
unsigned skip_vpd_pages:1;	/* do not read VPD pages */
	
unsigned try_vpd_pages:1;	/* attempt to read VPD pages */
	
unsigned use_192_bytes_for_3f:1; /* ask for 192 bytes from page 0x3f */
	
unsigned no_start_on_add:1;	/* do not issue start on add */
	
unsigned allow_restart:1; /* issue START_UNIT in error handler */
	
unsigned manage_start_stop:1;	/* Let HLD (sd) manage start/stop */
	
unsigned start_stop_pwr_cond:1;	/* Set power cond. in START_STOP_UNIT */
	
unsigned no_uld_attach:1; /* disable connecting to upper level drivers */
	
unsigned select_no_atn:1;
	
unsigned fix_capacity:1;	/* READ_CAPACITY is too high by 1 */
	
unsigned guess_capacity:1;	/* READ_CAPACITY might be too high by 1 */
	
unsigned retry_hwerror:1;	/* Retry HARDWARE_ERROR */
	
unsigned last_sector_bug:1;	/* do not use multisector accesses on
                                           SD_LAST_BUGGY_SECTORS */
	
unsigned no_read_disc_info:1;	/* Avoid READ_DISC_INFO cmds */
	
unsigned no_read_capacity_16:1; /* Avoid READ_CAPACITY_16 cmds */
	
unsigned try_rc_10_first:1;	/* Try READ_CAPACACITY_10 first */
	
unsigned security_supported:1;	/* Supports Security Protocols */
	
unsigned is_visible:1;	/* is the device visible in sysfs */
	
unsigned wce_default_on:1;	/* Cache is ON by default */
	
unsigned no_dif:1;	/* T10 PI (DIF) should be disabled */
	
unsigned broken_fua:1;		/* Don't set FUA bit */
	
unsigned lun_in_cdb:1;		/* Store LUN bits in CDB[1] */
	
unsigned unmap_limit_for_ws:1;	/* Use the UNMAP limit for WRITE SAME */

	
atomic_t disk_events_disable_depth; /* disable depth for disk events */

	DECLARE_BITMAP(supported_events, SDEV_EVT_MAXBITS); /* supported events */
	DECLARE_BITMAP(pending_events, SDEV_EVT_MAXBITS); /* pending events */
	
struct list_head event_list;	/* asserted events */
	
struct work_struct event_work;

	
unsigned int max_device_blocked; /* what device_blocked counts down from  */

#define SCSI_DEFAULT_DEVICE_BLOCKED	3

	
atomic_t iorequest_cnt;
	
atomic_t iodone_cnt;
	
atomic_t ioerr_cnt;

	
struct device		sdev_gendev,
				
sdev_dev;

	
struct execute_work	ew; /* used to get process context on put */
	
struct work_struct	requeue_work;

	
struct scsi_device_handler *handler;
	
void			*handler_data;

	
unsigned char		access_state;
	
struct mutex		state_mutex;
	
enum scsi_device_state sdev_state;
	
struct task_struct	*quiesced_by;
	
unsigned long		sdev_data[0];
} __attribute__((aligned(sizeof(unsigned long))));


#define	to_scsi_device(d)	\
	container_of(d, struct scsi_device, sdev_gendev)

#define	class_to_sdev(d)	\
	container_of(d, struct scsi_device, sdev_dev)

#define transport_class_to_sdev(class_dev) \
	to_scsi_device(class_dev->parent)


#define sdev_dbg(sdev, fmt, a...) \
	dev_dbg(&(sdev)->sdev_gendev, fmt, ##a)

/*
 * like scmd_printk, but the device name is passed in
 * as a string pointer
 */
__printf(4, 5) void
sdev_prefix_printk(const char *, const struct scsi_device *, const char *,
		const char *, ...);


#define sdev_printk(l, sdev, fmt, a...)				\
	sdev_prefix_printk(l, sdev, NULL, fmt, ##a)

__printf(3, 4) void
scmd_printk(const char *, const struct scsi_cmnd *, const char *, ...);


#define scmd_dbg(scmd, fmt, a...)					   \
	do {                                                               \
                if ((scmd)->request->rq_disk)                              \
                        sdev_dbg((scmd)->device, "[%s] " fmt,              \
                                 (scmd)->request->rq_disk->disk_name, ##a);\
                else                                                       \
                        sdev_dbg((scmd)->device, fmt, ##a);                \
        } while (0)


enum scsi_target_state {
	
STARGET_CREATED = 1,
	
STARGET_RUNNING,
	
STARGET_REMOVE,
	
STARGET_CREATED_REMOVE,
	
STARGET_DEL,
};

/*
 * scsi_target: representation of a scsi target, for now, this is only
 * used for single_lun devices. If no one has active IO to the target,
 * starget_sdev_user is NULL, else it points to the active sdev.
 */

struct scsi_target {
	
struct scsi_device	*starget_sdev_user;
	
struct list_head	siblings;
	
struct list_head	devices;
	
struct device		dev;
	
struct kref		reap_ref; /* last put renders target invisible */
	
unsigned int		channel;
	
unsigned int		id; /* target id ... replace
                                     * scsi_device.id eventually */
	
unsigned int		create:1; /* signal that it needs to be added */
	
unsigned int		single_lun:1;	/* Indicates we should only
                                                 * allow I/O to one of the luns
                                                 * for the device at a time. */
	
unsigned int		pdt_1f_for_no_lun:1;	/* PDT = 0x1f
                                                 * means no lun present. */
	
unsigned int		no_report_luns:1;	/* Don't use
                                                 * REPORT LUNS for scanning. */
	
unsigned int		expecting_lun_change:1;	/* A device has reported
                                                 * a 3F/0E UA, other devices on
                                                 * the same target will also. */
	/* commands actually active on LLD. */
	
atomic_t		target_busy;
	
atomic_t		target_blocked;

	/*
         * LLDs should set this in the slave_alloc host template callout.
         * If set to zero then there is not limit.
         */
	
unsigned int		can_queue;
	
unsigned int		max_target_blocked;

#define SCSI_DEFAULT_TARGET_BLOCKED	3

	
char			scsi_level;
	
enum scsi_target_state	state;
	
void 			*hostdata; /* available to low-level driver */
	
unsigned long		starget_data[0]; /* for the transport */
	/* starget_data must be the last element!!!! */
} __attribute__((aligned(sizeof(unsigned long))));


#define to_scsi_target(d)	container_of(d, struct scsi_target, dev)

static inline struct scsi_target *scsi_target(struct scsi_device *sdev) { return to_scsi_target(sdev->sdev_gendev.parent); }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley24100.00%1100.00%
Total24100.00%1100.00%

#define transport_class_to_starget(class_dev) \ to_scsi_target(class_dev->parent) #define starget_printk(prefix, starget, fmt, a...) \ dev_printk(prefix, &(starget)->dev, fmt, ##a) extern struct scsi_device *__scsi_add_device(struct Scsi_Host *, uint, uint, u64, void *hostdata); extern int scsi_add_device(struct Scsi_Host *host, uint channel, uint target, u64 lun); extern int scsi_register_device_handler(struct scsi_device_handler *scsi_dh); extern void scsi_remove_device(struct scsi_device *); extern int scsi_unregister_device_handler(struct scsi_device_handler *scsi_dh); void scsi_attach_vpd(struct scsi_device *sdev); extern struct scsi_device *scsi_device_from_queue(struct request_queue *q); extern int __must_check scsi_device_get(struct scsi_device *); extern void scsi_device_put(struct scsi_device *); extern struct scsi_device *scsi_device_lookup(struct Scsi_Host *, uint, uint, u64); extern struct scsi_device *__scsi_device_lookup(struct Scsi_Host *, uint, uint, u64); extern struct scsi_device *scsi_device_lookup_by_target(struct scsi_target *, u64); extern struct scsi_device *__scsi_device_lookup_by_target(struct scsi_target *, u64); extern void starget_for_each_device(struct scsi_target *, void *, void (*fn)(struct scsi_device *, void *)); extern void __starget_for_each_device(struct scsi_target *, void *, void (*fn)(struct scsi_device *, void *)); /* only exposed to implement shost_for_each_device */ extern struct scsi_device *__scsi_iterate_devices(struct Scsi_Host *, struct scsi_device *); /** * shost_for_each_device - iterate over all devices of a host * @sdev: the &struct scsi_device to use as a cursor * @shost: the &struct scsi_host to iterate over * * Iterator that returns each device attached to @shost. This loop * takes a reference on each device and releases it at the end. If * you break out of the loop, you must call scsi_device_put(sdev). */ #define shost_for_each_device(sdev, shost) \ for ((sdev) = __scsi_iterate_devices((shost), NULL); \ (sdev); \ (sdev) = __scsi_iterate_devices((shost), (sdev))) /** * __shost_for_each_device - iterate over all devices of a host (UNLOCKED) * @sdev: the &struct scsi_device to use as a cursor * @shost: the &struct scsi_host to iterate over * * Iterator that returns each device attached to @shost. It does _not_ * take a reference on the scsi_device, so the whole loop must be * protected by shost->host_lock. * * Note: The only reason to use this is because you need to access the * device list in interrupt context. Otherwise you really want to use * shost_for_each_device instead. */ #define __shost_for_each_device(sdev, shost) \ list_for_each_entry((sdev), &((shost)->__devices), siblings) extern int scsi_change_queue_depth(struct scsi_device *, int); extern int scsi_track_queue_full(struct scsi_device *, int); extern int scsi_set_medium_removal(struct scsi_device *, char); extern int scsi_mode_sense(struct scsi_device *sdev, int dbd, int modepage, unsigned char *buffer, int len, int timeout, int retries, struct scsi_mode_data *data, struct scsi_sense_hdr *); extern int scsi_mode_select(struct scsi_device *sdev, int pf, int sp, int modepage, unsigned char *buffer, int len, int timeout, int retries, struct scsi_mode_data *data, struct scsi_sense_hdr *); extern int scsi_test_unit_ready(struct scsi_device *sdev, int timeout, int retries, struct scsi_sense_hdr *sshdr); extern int scsi_get_vpd_page(struct scsi_device *, u8 page, unsigned char *buf, int buf_len); extern int scsi_report_opcode(struct scsi_device *sdev, unsigned char *buffer, unsigned int len, unsigned char opcode); extern int scsi_device_set_state(struct scsi_device *sdev, enum scsi_device_state state); extern struct scsi_event *sdev_evt_alloc(enum scsi_device_event evt_type, gfp_t gfpflags); extern void sdev_evt_send(struct scsi_device *sdev, struct scsi_event *evt); extern void sdev_evt_send_simple(struct scsi_device *sdev, enum scsi_device_event evt_type, gfp_t gfpflags); extern int scsi_device_quiesce(struct scsi_device *sdev); extern void scsi_device_resume(struct scsi_device *sdev); extern void scsi_target_quiesce(struct scsi_target *); extern void scsi_target_resume(struct scsi_target *); extern void scsi_scan_target(struct device *parent, unsigned int channel, unsigned int id, u64 lun, enum scsi_scan_mode rescan); extern void scsi_target_reap(struct scsi_target *); extern void scsi_target_block(struct device *); extern void scsi_target_unblock(struct device *, enum scsi_device_state); extern void scsi_remove_target(struct device *); extern const char *scsi_device_state_name(enum scsi_device_state); extern int scsi_is_sdev_device(const struct device *); extern int scsi_is_target_device(const struct device *); extern void scsi_sanitize_inquiry_string(unsigned char *s, int len); extern int scsi_execute(struct scsi_device *sdev, const unsigned char *cmd, int data_direction, void *buffer, unsigned bufflen, unsigned char *sense, struct scsi_sense_hdr *sshdr, int timeout, int retries, u64 flags, req_flags_t rq_flags, int *resid);
static inline int scsi_execute_req(struct scsi_device *sdev, const unsigned char *cmd, int data_direction, void *buffer, unsigned bufflen, struct scsi_sense_hdr *sshdr, int timeout, int retries, int *resid) { return scsi_execute(sdev, cmd, data_direction, buffer, bufflen, NULL, sshdr, timeout, retries, 0, 0, resid); }

Contributors

PersonTokensPropCommitsCommitProp
Lin Ming6490.14%133.33%
Christoph Hellwig79.86%266.67%
Total71100.00%3100.00%

extern void sdev_disable_disk_events(struct scsi_device *sdev); extern void sdev_enable_disk_events(struct scsi_device *sdev); extern int scsi_vpd_lun_id(struct scsi_device *, char *, size_t); extern int scsi_vpd_tpg_id(struct scsi_device *, int *); #ifdef CONFIG_PM extern int scsi_autopm_get_device(struct scsi_device *); extern void scsi_autopm_put_device(struct scsi_device *); #else
static inline int scsi_autopm_get_device(struct scsi_device *d) { return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Alan Stern15100.00%1100.00%
Total15100.00%1100.00%


static inline void scsi_autopm_put_device(struct scsi_device *d) {}

Contributors

PersonTokensPropCommitsCommitProp
Alan Stern11100.00%1100.00%
Total11100.00%1100.00%

#endif /* CONFIG_PM */
static inline int __must_check scsi_device_reprobe(struct scsi_device *sdev) { return device_reprobe(&sdev->sdev_gendev); }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley1881.82%150.00%
Andrew Morton418.18%150.00%
Total22100.00%2100.00%


static inline unsigned int sdev_channel(struct scsi_device *sdev) { return sdev->channel; }

Contributors

PersonTokensPropCommitsCommitProp
Jeff Garzik18100.00%1100.00%
Total18100.00%1100.00%


static inline unsigned int sdev_id(struct scsi_device *sdev) { return sdev->id; }

Contributors

PersonTokensPropCommitsCommitProp
Jeff Garzik18100.00%1100.00%
Total18100.00%1100.00%

#define scmd_id(scmd) sdev_id((scmd)->device) #define scmd_channel(scmd) sdev_channel((scmd)->device) /* * checks for positions of the SCSI state machine */
static inline int scsi_device_online(struct scsi_device *sdev) { return (sdev->sdev_state != SDEV_OFFLINE && sdev->sdev_state != SDEV_TRANSPORT_OFFLINE && sdev->sdev_state != SDEV_DEL); }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley1854.55%125.00%
Hannes Reinecke824.24%125.00%
Mike Christie618.18%125.00%
Andrew Morton13.03%125.00%
Total33100.00%4100.00%


static inline int scsi_device_blocked(struct scsi_device *sdev) { return sdev->sdev_state == SDEV_BLOCK || sdev->sdev_state == SDEV_CREATED_BLOCK; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley25100.00%2100.00%
Total25100.00%2100.00%


static inline int scsi_device_created(struct scsi_device *sdev) { return sdev->sdev_state == SDEV_CREATED || sdev->sdev_state == SDEV_CREATED_BLOCK; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley25100.00%2100.00%
Total25100.00%2100.00%

int scsi_internal_device_block_nowait(struct scsi_device *sdev); int scsi_internal_device_unblock_nowait(struct scsi_device *sdev, enum scsi_device_state new_state); /* accessor functions for the SCSI parameters */
static inline int scsi_device_sync(struct scsi_device *sdev) { return sdev->sdtr; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley17100.00%1100.00%
Total17100.00%1100.00%


static inline int scsi_device_wide(struct scsi_device *sdev) { return sdev->wdtr; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley17100.00%1100.00%
Total17100.00%1100.00%


static inline int scsi_device_dt(struct scsi_device *sdev) { return sdev->ppr; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley17100.00%1100.00%
Total17100.00%1100.00%


static inline int scsi_device_dt_only(struct scsi_device *sdev) { if (sdev->inquiry_len < 57) return 0; return (sdev->inquiry[56] & 0x0c) == 0x04; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley37100.00%1100.00%
Total37100.00%1100.00%


static inline int scsi_device_ius(struct scsi_device *sdev) { if (sdev->inquiry_len < 57) return 0; return sdev->inquiry[56] & 0x01; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley33100.00%1100.00%
Total33100.00%1100.00%


static inline int scsi_device_qas(struct scsi_device *sdev) { if (sdev->inquiry_len < 57) return 0; return sdev->inquiry[56] & 0x02; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley33100.00%1100.00%
Total33100.00%1100.00%


static inline int scsi_device_enclosure(struct scsi_device *sdev) { return sdev->inquiry ? (sdev->inquiry[6] & (1<<6)) : 1; }

Contributors

PersonTokensPropCommitsCommitProp
James Bottomley2676.47%150.00%
Krishnasamy, Somasundaram823.53%150.00%
Total34100.00%2100.00%


static inline int scsi_device_protection(struct scsi_device *sdev) { if (sdev->no_dif) return 0; return sdev->scsi_level > SCSI_2 && sdev->inquiry[5] & (1<<0); }

Contributors

PersonTokensPropCommitsCommitProp
Martin K. Petersen3585.37%266.67%
Hugh Dickins614.63%133.33%
Total41100.00%3100.00%


static inline int scsi_device_tpgs(struct scsi_device *sdev) { return sdev->inquiry ? (sdev->inquiry[5] >> 4) & 0x3 : 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hannes Reinecke32100.00%1100.00%
Total32100.00%1100.00%

/** * scsi_device_supports_vpd - test if a device supports VPD pages * @sdev: the &struct scsi_device to test * * If the 'try_vpd_pages' flag is set it takes precedence. * Otherwise we will assume VPD pages are supported if the * SCSI level is at least SPC-3 and 'skip_vpd_pages' is not set. */
static inline int scsi_device_supports_vpd(struct scsi_device *sdev) { /* Attempt VPD inquiry if the device blacklist explicitly calls * for it. */ if (sdev->try_vpd_pages) return 1; /* * Although VPD inquiries can go to SCSI-2 type devices, * some USB ones crash on receiving them, and the pages * we currently ask for are mandatory for SPC-2 and beyond */ if (sdev->scsi_level >= SCSI_SPC_2 && !sdev->skip_vpd_pages) return 1; return 0; }

Contributors

PersonTokensPropCommitsCommitProp
Hannes Reinecke42100.00%2100.00%
Total42100.00%2100.00%

#define MODULE_ALIAS_SCSI_DEVICE(type) \ MODULE_ALIAS("scsi:t-" __stringify(type) "*") #define SCSI_DEVICE_MODALIAS_FMT "scsi:t-0x%02x" #endif /* _SCSI_SCSI_DEVICE_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
James Bottomley85835.24%3524.31%
Christoph Hellwig46519.10%1611.11%
Hannes Reinecke2399.82%1812.50%
Jeff Garzik1526.24%21.39%
Alan Stern1014.15%96.25%
Martin K. Petersen984.02%96.25%
Lin Ming642.63%10.69%
Bart Van Assche552.26%85.56%
Ewan D. Milne361.48%21.39%
Mike Christie271.11%32.08%
Maciej W. Rozycki261.07%10.69%
Dan J Williams261.07%10.69%
Aaron Lu240.99%10.69%
Chandra Seetharaman230.94%10.69%
Patrick Mansfield210.86%32.08%
Andrew Morton200.82%32.08%
Vasu Dev200.82%10.69%
Andrew Vasquez190.78%10.69%
Hans de Goede170.70%32.08%
Mike Anderson170.70%21.39%
Matthew Wilcox130.53%21.39%
Don Brace130.53%10.69%
Michael Tokarev120.49%10.69%
Hugh Dickins90.37%10.69%
Krishnasamy, Somasundaram80.33%10.69%
Tony Battersby70.29%10.69%
Brian King60.25%10.69%
Namjae Jeon60.25%10.69%
Tejun Heo60.25%10.69%
Oliver Neukum60.25%10.69%
Jason J. Herne60.25%10.69%
Stefan Richter60.25%10.69%
Tony Jones50.21%10.69%
Kurt Garloff40.16%10.69%
Jens Axboe40.16%10.69%
FUJITA Tomonori40.16%10.69%
Paul Gortmaker30.12%10.69%
James Smart20.08%10.69%
Rafael J. Wysocki20.08%10.69%
Johannes Thumshirn20.08%10.69%
Linus Torvalds10.04%10.69%
Arun Sharma10.04%10.69%
Greg Kroah-Hartman10.04%10.69%
Total2435100.00%144100.00%
Directory: include/scsi
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with cregit.