| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| David Teigland | 1708 | 71.67% | 43 | 42.57% |
| Alexander Aring | 617 | 25.89% | 44 | 43.56% |
| Al Viro | 34 | 1.43% | 4 | 3.96% |
| Adrian Bunk | 7 | 0.29% | 1 | 0.99% |
| Greg Kroah-Hartman | 4 | 0.17% | 1 | 0.99% |
| Gustavo A. R. Silva | 3 | 0.13% | 1 | 0.99% |
| Thomas Gleixner | 2 | 0.08% | 1 | 0.99% |
| Robert S Peterson | 2 | 0.08% | 1 | 0.99% |
| Paulo Miguel Almeida | 2 | 0.08% | 1 | 0.99% |
| Arnd Bergmann | 1 | 0.04% | 1 | 0.99% |
| Patrick Caulfield | 1 | 0.04% | 1 | 0.99% |
| Linus Torvalds | 1 | 0.04% | 1 | 0.99% |
| Zhilong Liu | 1 | 0.04% | 1 | 0.99% |
| Total | 2383 | 101 |
/* SPDX-License-Identifier: GPL-2.0-only */ /****************************************************************************** ******************************************************************************* ** ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. ** ** ******************************************************************************* ******************************************************************************/ #ifndef __DLM_INTERNAL_DOT_H__ #define __DLM_INTERNAL_DOT_H__ /* * This is the main header file to be included in each DLM source file. */ #include <uapi/linux/dlm_device.h> #include <linux/slab.h> #include <linux/sched.h> #include <linux/types.h> #include <linux/ctype.h> #include <linux/spinlock.h> #include <linux/vmalloc.h> #include <linux/list.h> #include <linux/errno.h> #include <linux/random.h> #include <linux/delay.h> #include <linux/socket.h> #include <linux/kthread.h> #include <linux/kobject.h> #include <linux/kref.h> #include <linux/kernel.h> #include <linux/jhash.h> #include <linux/miscdevice.h> #include <linux/rhashtable.h> #include <linux/mutex.h> #include <linux/xarray.h> #include <linux/ratelimit.h> #include <linux/uaccess.h> #include <linux/dlm.h> #include "config.h" struct dlm_ls; struct dlm_lkb; struct dlm_rsb; struct dlm_member; struct dlm_rsbtable; struct dlm_recover; struct dlm_header; struct dlm_message; struct dlm_rcom; struct dlm_mhandle; struct dlm_msg; #define log_print(fmt, args...) \ printk(KERN_ERR "dlm: "fmt"\n" , ##args) #define log_print_ratelimited(fmt, args...) \ printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args) #define log_error(ls, fmt, args...) \ printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) #define log_rinfo(ls, fmt, args...) \ do { \ if (dlm_config.ci_log_info) \ printk(KERN_INFO "dlm: %s: " fmt "\n", \ (ls)->ls_name, ##args); \ else if (dlm_config.ci_log_debug) \ printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ (ls)->ls_name , ##args); \ } while (0) #define log_debug(ls, fmt, args...) \ do { \ if (dlm_config.ci_log_debug) \ printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ (ls)->ls_name , ##args); \ } while (0) #define log_limit(ls, fmt, args...) \ do { \ if (dlm_config.ci_log_debug) \ printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ (ls)->ls_name , ##args); \ } while (0) #define DLM_ASSERT(x, do) \ { \ if (!(x)) \ { \ printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ "DLM: assertion: \"%s\"\n" \ "DLM: time = %lu\n", \ __LINE__, __FILE__, #x, jiffies); \ {do} \ printk("\n"); \ panic("DLM: Record message above and reboot.\n"); \ } \ } /* * Lockspace member (per node in a ls) */ struct dlm_member { struct list_head list; int nodeid; int weight; int slot; int slot_prev; int comm_seq; uint32_t generation; }; /* * Save and manage recovery state for a lockspace. */ struct dlm_recover { struct list_head list; struct dlm_config_node *nodes; int nodes_count; uint64_t seq; }; /* * Pass input args to second stage locking function. */ struct dlm_args { uint32_t flags; void (*astfn) (void *astparam); void *astparam; void (*bastfn) (void *astparam, int mode); int mode; struct dlm_lksb *lksb; }; /* * Lock block * * A lock can be one of three types: * * local copy lock is mastered locally * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) * process copy lock is mastered on a remote node * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) * master copy master node's copy of a lock owned by remote node * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) * * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or * dlm_unlock. The dlm does not modify these or use any private flags in * this field; it only contains DLM_LKF_ flags from dlm.h. These flags * are sent as-is to the remote master when the lock is remote. * * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. * Some internal flags are shared between the master and process nodes; * these shared flags are kept in the lower two bytes. One of these * flags set on the master copy will be propagated to the process copy * and v.v. Other internal flags are private to the master or process * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. * * lkb_sbflags: status block flags. These flags are copied directly into * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion * ast. All defined in dlm.h with DLM_SBF_ prefix. * * lkb_status: the lock status indicates which rsb queue the lock is * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT * * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a * reply is needed. Only set when the lkb is on the lockspace waiters * list awaiting a reply from a remote node. * * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb * is a master copy, nodeid specifies the remote lock holder, when the * lkb is a process copy, the nodeid specifies the lock master. */ /* lkb_status */ #define DLM_LKSTS_WAITING 1 #define DLM_LKSTS_GRANTED 2 #define DLM_LKSTS_CONVERT 3 /* lkb_iflags */ #define DLM_IFL_MSTCPY_BIT 16 #define __DLM_IFL_MIN_BIT DLM_IFL_MSTCPY_BIT #define DLM_IFL_RESEND_BIT 17 #define DLM_IFL_DEAD_BIT 18 #define DLM_IFL_OVERLAP_UNLOCK_BIT 19 #define DLM_IFL_OVERLAP_CANCEL_BIT 20 #define DLM_IFL_ENDOFLIFE_BIT 21 #define DLM_IFL_DEADLOCK_CANCEL_BIT 24 #define __DLM_IFL_MAX_BIT DLM_IFL_DEADLOCK_CANCEL_BIT /* lkb_dflags */ #define DLM_DFL_USER_BIT 0 #define __DLM_DFL_MIN_BIT DLM_DFL_USER_BIT #define DLM_DFL_ORPHAN_BIT 1 #define __DLM_DFL_MAX_BIT DLM_DFL_ORPHAN_BIT #define DLM_CB_CAST 0x00000001 #define DLM_CB_BAST 0x00000002 /* much of this is just saving user space pointers associated with the * lock that we pass back to the user lib with an ast */ struct dlm_user_args { struct dlm_user_proc *proc; /* each process that opens the lockspace * device has private data * (dlm_user_proc) on the struct file, * the process's locks point back to it */ struct dlm_lksb lksb; struct dlm_lksb __user *user_lksb; void __user *castparam; void __user *castaddr; void __user *bastparam; void __user *bastaddr; uint64_t xid; }; struct dlm_callback { uint32_t flags; /* DLM_CBF_ */ int sb_status; /* copy to lksb status */ uint8_t sb_flags; /* copy to lksb flags */ int8_t mode; /* rq mode of bast, gr mode of cast */ bool copy_lvb; struct dlm_lksb *lkb_lksb; unsigned char lvbptr[DLM_USER_LVB_LEN]; union { void *astparam; /* caller's ast arg */ struct dlm_user_args ua; }; struct work_struct work; void (*bastfn)(void *astparam, int mode); void (*astfn)(void *astparam); char res_name[DLM_RESNAME_MAXLEN]; size_t res_length; uint32_t ls_id; uint32_t lkb_id; struct list_head list; }; struct dlm_lkb { struct dlm_rsb *lkb_resource; /* the rsb */ struct kref lkb_ref; int lkb_nodeid; /* copied from rsb */ int lkb_ownpid; /* pid of lock owner */ uint32_t lkb_id; /* our lock ID */ uint32_t lkb_remid; /* lock ID on remote partner */ uint32_t lkb_exflags; /* external flags from caller */ unsigned long lkb_sbflags; /* lksb flags */ unsigned long lkb_dflags; /* distributed flags */ unsigned long lkb_iflags; /* internal flags */ uint32_t lkb_lvbseq; /* lvb sequence number */ int8_t lkb_status; /* granted, waiting, convert */ int8_t lkb_rqmode; /* requested lock mode */ int8_t lkb_grmode; /* granted lock mode */ int8_t lkb_highbast; /* highest mode bast sent for */ int8_t lkb_wait_type; /* type of reply waiting for */ int8_t lkb_wait_count; int lkb_wait_nodeid; /* for debugging */ struct list_head lkb_statequeue; /* rsb g/c/w list */ struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ struct list_head lkb_wait_reply; /* waiting for remote reply */ struct list_head lkb_ownqueue; /* list of locks for a process */ ktime_t lkb_timestamp; int8_t lkb_last_cast_cb_mode; int8_t lkb_last_bast_cb_mode; int8_t lkb_last_cb_mode; uint8_t lkb_last_cb_flags; ktime_t lkb_last_cast_time; /* for debugging */ ktime_t lkb_last_bast_time; /* for debugging */ uint64_t lkb_recover_seq; /* from ls_recover_seq */ char *lkb_lvbptr; struct dlm_lksb *lkb_lksb; /* caller's status block */ void (*lkb_astfn) (void *astparam); void (*lkb_bastfn) (void *astparam, int mode); union { void *lkb_astparam; /* caller's ast arg */ struct dlm_user_args *lkb_ua; }; }; /* * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real * nodeid, even when nodeid is our_nodeid. * * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, * greater than zero when another nodeid. * * (TODO: remove res_nodeid and only use res_master_nodeid) */ struct dlm_rsb { struct dlm_ls *res_ls; /* the lockspace */ struct kref res_ref; spinlock_t res_lock; unsigned long res_flags; int res_length; /* length of rsb name */ int res_nodeid; int res_master_nodeid; int res_dir_nodeid; unsigned long res_id; /* for ls_recover_xa */ uint32_t res_lvbseq; uint32_t res_hash; unsigned long res_toss_time; uint32_t res_first_lkid; struct list_head res_lookup; /* lkbs waiting on first */ struct rhash_head res_node; /* rsbtbl */ struct list_head res_grantqueue; struct list_head res_convertqueue; struct list_head res_waitqueue; struct list_head res_slow_list; /* ls_slow_* */ struct list_head res_scan_list; struct list_head res_root_list; /* used for recovery */ struct list_head res_masters_list; /* used for recovery */ struct list_head res_recover_list; /* used for recovery */ int res_recover_locks_count; struct rcu_head rcu; char *res_lvbptr; char res_name[DLM_RESNAME_MAXLEN+1]; }; /* dlm_master_lookup() flags */ #define DLM_LU_RECOVER_DIR 1 #define DLM_LU_RECOVER_MASTER 2 /* dlm_master_lookup() results */ #define DLM_LU_MATCH 1 #define DLM_LU_ADD 2 /* find_rsb() flags */ #define R_REQUEST 0x00000001 #define R_RECEIVE_REQUEST 0x00000002 #define R_RECEIVE_RECOVER 0x00000004 /* rsb_flags */ enum rsb_flags { RSB_MASTER_UNCERTAIN, RSB_VALNOTVALID, RSB_VALNOTVALID_PREV, RSB_NEW_MASTER, RSB_NEW_MASTER2, RSB_RECOVER_CONVERT, RSB_RECOVER_GRANT, RSB_RECOVER_LVB_INVAL, RSB_INACTIVE, RSB_HASHED, /* set while rsb is on ls_rsbtbl */ }; static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) { __set_bit(flag, &r->res_flags); } static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) { __clear_bit(flag, &r->res_flags); } static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) { return test_bit(flag, &r->res_flags); } /* dlm_header is first element of all structs sent between nodes */ #define DLM_HEADER_MAJOR 0x00030000 #define DLM_HEADER_MINOR 0x00000002 #define DLM_VERSION_3_1 0x00030001 #define DLM_VERSION_3_2 0x00030002 #define DLM_HEADER_SLOTS 0x00000001 #define DLM_MSG 1 #define DLM_RCOM 2 #define DLM_OPTS 3 #define DLM_ACK 4 #define DLM_FIN 5 struct dlm_header { __le32 h_version; union { /* for DLM_MSG and DLM_RCOM */ __le32 h_lockspace; /* for DLM_ACK and DLM_OPTS */ __le32 h_seq; } u; __le32 h_nodeid; /* nodeid of sender */ __le16 h_length; uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ uint8_t h_pad; }; #define DLM_MSG_REQUEST 1 #define DLM_MSG_CONVERT 2 #define DLM_MSG_UNLOCK 3 #define DLM_MSG_CANCEL 4 #define DLM_MSG_REQUEST_REPLY 5 #define DLM_MSG_CONVERT_REPLY 6 #define DLM_MSG_UNLOCK_REPLY 7 #define DLM_MSG_CANCEL_REPLY 8 #define DLM_MSG_GRANT 9 #define DLM_MSG_BAST 10 #define DLM_MSG_LOOKUP 11 #define DLM_MSG_REMOVE 12 #define DLM_MSG_LOOKUP_REPLY 13 #define DLM_MSG_PURGE 14 struct dlm_message { struct dlm_header m_header; __le32 m_type; /* DLM_MSG_ */ __le32 m_nodeid; __le32 m_pid; __le32 m_lkid; /* lkid on sender */ __le32 m_remid; /* lkid on receiver */ __le32 m_parent_lkid; __le32 m_parent_remid; __le32 m_exflags; __le32 m_sbflags; __le32 m_flags; __le32 m_lvbseq; __le32 m_hash; __le32 m_status; __le32 m_grmode; __le32 m_rqmode; __le32 m_bastmode; __le32 m_asts; __le32 m_result; /* 0 or -EXXX */ char m_extra[]; /* name or lvb */ }; #define DLM_RS_NODES 0x00000001 #define DLM_RS_NODES_ALL 0x00000002 #define DLM_RS_DIR 0x00000004 #define DLM_RS_DIR_ALL 0x00000008 #define DLM_RS_LOCKS 0x00000010 #define DLM_RS_LOCKS_ALL 0x00000020 #define DLM_RS_DONE 0x00000040 #define DLM_RS_DONE_ALL 0x00000080 #define DLM_RCOM_STATUS 1 #define DLM_RCOM_NAMES 2 #define DLM_RCOM_LOOKUP 3 #define DLM_RCOM_LOCK 4 #define DLM_RCOM_STATUS_REPLY 5 #define DLM_RCOM_NAMES_REPLY 6 #define DLM_RCOM_LOOKUP_REPLY 7 #define DLM_RCOM_LOCK_REPLY 8 struct dlm_rcom { struct dlm_header rc_header; __le32 rc_type; /* DLM_RCOM_ */ __le32 rc_result; /* multi-purpose */ __le64 rc_id; /* match reply with request */ __le64 rc_seq; /* sender's ls_recover_seq */ __le64 rc_seq_reply; /* remote ls_recover_seq */ char rc_buf[]; }; struct dlm_opt_header { __le16 t_type; __le16 t_length; __le32 t_pad; /* need to be 8 byte aligned */ char t_value[]; }; /* encapsulation header */ struct dlm_opts { struct dlm_header o_header; uint8_t o_nextcmd; uint8_t o_pad; __le16 o_optlen; __le32 o_pad2; char o_opts[]; }; union dlm_packet { struct dlm_header header; /* common to other two */ struct dlm_message message; struct dlm_rcom rcom; struct dlm_opts opts; }; #define DLM_RSF_NEED_SLOTS 0x00000001 /* RCOM_STATUS data */ struct rcom_status { __le32 rs_flags; __le32 rs_unused1; __le64 rs_unused2; }; /* RCOM_STATUS_REPLY data */ struct rcom_config { __le32 rf_lvblen; __le32 rf_lsflags; /* DLM_HEADER_SLOTS adds: */ __le32 rf_flags; __le16 rf_our_slot; __le16 rf_num_slots; __le32 rf_generation; __le32 rf_unused1; __le64 rf_unused2; }; struct rcom_slot { __le32 ro_nodeid; __le16 ro_slot; __le16 ro_unused1; __le64 ro_unused2; }; struct rcom_lock { __le32 rl_ownpid; __le32 rl_lkid; __le32 rl_remid; __le32 rl_parent_lkid; __le32 rl_parent_remid; __le32 rl_exflags; __le32 rl_flags; __le32 rl_lvbseq; __le32 rl_result; int8_t rl_rqmode; int8_t rl_grmode; int8_t rl_status; int8_t rl_asts; __le16 rl_wait_type; __le16 rl_namelen; char rl_name[DLM_RESNAME_MAXLEN]; char rl_lvb[]; }; struct dlm_ls { struct list_head ls_list; /* list of lockspaces */ uint32_t ls_global_id; /* global unique lockspace ID */ uint32_t ls_generation; uint32_t ls_exflags; int ls_lvblen; atomic_t ls_count; /* refcount of processes in the dlm using this ls */ wait_queue_head_t ls_count_wait; int ls_create_count; /* create/release refcount */ unsigned long ls_flags; /* LSFL_ */ struct kobject ls_kobj; struct xarray ls_lkbxa; rwlock_t ls_lkbxa_lock; /* an rsb is on rsbtl for primary locking functions, and on a slow list for recovery/dump iteration */ struct rhashtable ls_rsbtbl; rwlock_t ls_rsbtbl_lock; /* for ls_rsbtbl and ls_slow */ struct list_head ls_slow_inactive; /* to iterate rsbtbl */ struct list_head ls_slow_active; /* to iterate rsbtbl */ struct timer_list ls_scan_timer; /* based on first scan_list rsb toss_time */ struct list_head ls_scan_list; /* rsbs ordered by res_toss_time */ spinlock_t ls_scan_lock; spinlock_t ls_waiters_lock; struct list_head ls_waiters; /* lkbs needing a reply */ spinlock_t ls_orphans_lock; struct list_head ls_orphans; struct list_head ls_nodes; /* current nodes in ls */ struct list_head ls_nodes_gone; /* dead node list, recovery */ int ls_num_nodes; /* number of nodes in ls */ int ls_low_nodeid; int ls_total_weight; int *ls_node_array; int ls_slot; int ls_num_slots; int ls_slots_size; struct dlm_slot *ls_slots; struct dlm_rsb ls_local_rsb; /* for returning errors */ struct dlm_lkb ls_local_lkb; /* for returning errors */ struct dlm_message ls_local_ms; /* for faking a reply */ struct dentry *ls_debug_rsb_dentry; /* debugfs */ struct dentry *ls_debug_waiters_dentry; /* debugfs */ struct dentry *ls_debug_locks_dentry; /* debugfs */ struct dentry *ls_debug_all_dentry; /* debugfs */ struct dentry *ls_debug_toss_dentry; /* debugfs */ struct dentry *ls_debug_queued_asts_dentry; /* debugfs */ wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ int ls_uevent_result; struct completion ls_recovery_done; int ls_recovery_result; struct miscdevice ls_device; struct workqueue_struct *ls_callback_wq; /* recovery related */ spinlock_t ls_cb_lock; struct list_head ls_cb_delay; /* save for queue_work later */ struct task_struct *ls_recoverd_task; struct mutex ls_recoverd_active; spinlock_t ls_recover_lock; unsigned long ls_recover_begin; /* jiffies timestamp */ uint32_t ls_recover_status; /* DLM_RS_ */ uint64_t ls_recover_seq; struct dlm_recover *ls_recover_args; struct rw_semaphore ls_in_recovery; /* block local requests */ rwlock_t ls_recv_active; /* block dlm_recv */ struct list_head ls_requestqueue;/* queue remote requests */ rwlock_t ls_requestqueue_lock; struct dlm_rcom *ls_recover_buf; int ls_recover_nodeid; /* for debugging */ unsigned int ls_recover_locks_in; /* for log info */ uint64_t ls_rcom_seq; spinlock_t ls_rcom_spin; struct list_head ls_recover_list; spinlock_t ls_recover_list_lock; int ls_recover_list_count; struct xarray ls_recover_xa; spinlock_t ls_recover_xa_lock; wait_queue_head_t ls_wait_general; wait_queue_head_t ls_recover_lock_wait; spinlock_t ls_clear_proc_locks; struct list_head ls_masters_list; /* root resources */ rwlock_t ls_masters_lock; /* protect root_list */ struct list_head ls_dir_dump_list; /* root resources */ rwlock_t ls_dir_dump_lock; /* protect root_list */ const struct dlm_lockspace_ops *ls_ops; void *ls_ops_arg; int ls_namelen; char ls_name[DLM_LOCKSPACE_LEN + 1]; }; /* * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines * that they should abort what they're doing so new recovery can be started. * * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it * should do down_write() on the in_recovery rw_semaphore. (doing down_write * within dlm_ls_stop causes complaints about the lock acquired/released * in different contexts.) * * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. * It sets this after it is done with down_write() on the in_recovery * rw_semaphore and clears it after it has released the rw_semaphore. * * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it * should begin recovery of the lockspace. * * LSFL_RUNNING - set when normal locking activity is enabled. * dlm_ls_stop() clears this to tell dlm locking routines that they should * quit what they are doing so recovery can run. dlm_recoverd sets * this after recovery is finished. */ #define LSFL_RECOVER_STOP 0 #define LSFL_RECOVER_DOWN 1 #define LSFL_RECOVER_LOCK 2 #define LSFL_RECOVER_WORK 3 #define LSFL_RUNNING 4 #define LSFL_RCOM_READY 5 #define LSFL_RCOM_WAIT 6 #define LSFL_UEVENT_WAIT 7 #define LSFL_CB_DELAY 9 #define LSFL_NODIR 10 #define LSFL_RECV_MSG_BLOCKED 11 #define LSFL_FS 12 #define LSFL_SOFTIRQ 13 #define DLM_PROC_FLAGS_CLOSING 1 #define DLM_PROC_FLAGS_COMPAT 2 /* locks list is kept so we can remove all a process's locks when it exits (or orphan those that are persistent) */ struct dlm_user_proc { dlm_lockspace_t *lockspace; unsigned long flags; /* DLM_PROC_FLAGS */ struct list_head asts; spinlock_t asts_spin; struct list_head locks; spinlock_t locks_spin; struct list_head unlocking; wait_queue_head_t wait; }; static inline int dlm_locking_stopped(struct dlm_ls *ls) { return !test_bit(LSFL_RUNNING, &ls->ls_flags); } static inline int dlm_recovery_stopped(struct dlm_ls *ls) { return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); } static inline int dlm_no_directory(struct dlm_ls *ls) { return test_bit(LSFL_NODIR, &ls->ls_flags); } /* takes a snapshot from dlm atomic flags */ static inline uint32_t dlm_flags_val(const unsigned long *addr, uint32_t min, uint32_t max) { uint32_t bit = min, val = 0; for_each_set_bit_from(bit, addr, max + 1) { val |= BIT(bit); } return val; } static inline uint32_t dlm_iflags_val(const struct dlm_lkb *lkb) { return dlm_flags_val(&lkb->lkb_iflags, __DLM_IFL_MIN_BIT, __DLM_IFL_MAX_BIT); } static inline uint32_t dlm_dflags_val(const struct dlm_lkb *lkb) { return dlm_flags_val(&lkb->lkb_dflags, __DLM_DFL_MIN_BIT, __DLM_DFL_MAX_BIT); } /* coming from UAPI header * * TODO: * Move this to UAPI header and let other values point to them and use BIT() */ #define DLM_SBF_DEMOTED_BIT 0 #define __DLM_SBF_MIN_BIT DLM_SBF_DEMOTED_BIT #define DLM_SBF_VALNOTVALID_BIT 1 #define DLM_SBF_ALTMODE_BIT 2 #define __DLM_SBF_MAX_BIT DLM_SBF_ALTMODE_BIT static inline uint32_t dlm_sbflags_val(const struct dlm_lkb *lkb) { /* be sure the next person updates this */ BUILD_BUG_ON(BIT(__DLM_SBF_MAX_BIT) != DLM_SBF_ALTMODE); return dlm_flags_val(&lkb->lkb_sbflags, __DLM_SBF_MIN_BIT, __DLM_SBF_MAX_BIT); } static inline void dlm_set_flags_val(unsigned long *addr, uint32_t val, uint32_t min, uint32_t max) { uint32_t bit; for (bit = min; bit < (max + 1); bit++) { if (val & BIT(bit)) set_bit(bit, addr); else clear_bit(bit, addr); } } static inline void dlm_set_dflags_val(struct dlm_lkb *lkb, uint32_t val) { dlm_set_flags_val(&lkb->lkb_dflags, val, __DLM_DFL_MIN_BIT, __DLM_DFL_MAX_BIT); } static inline void dlm_set_sbflags_val(struct dlm_lkb *lkb, uint32_t val) { dlm_set_flags_val(&lkb->lkb_sbflags, val, __DLM_SBF_MIN_BIT, __DLM_SBF_MAX_BIT); } int dlm_plock_init(void); void dlm_plock_exit(void); #ifdef CONFIG_DLM_DEBUG void dlm_register_debugfs(void); void dlm_unregister_debugfs(void); void dlm_create_debug_file(struct dlm_ls *ls); void dlm_delete_debug_file(struct dlm_ls *ls); void *dlm_create_debug_comms_file(int nodeid, void *data); void dlm_delete_debug_comms_file(void *ctx); #else static inline void dlm_register_debugfs(void) { } static inline void dlm_unregister_debugfs(void) { } static inline void dlm_create_debug_file(struct dlm_ls *ls) { } static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; } static inline void dlm_delete_debug_comms_file(void *ctx) { } #endif #endif /* __DLM_INTERNAL_DOT_H__ */
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