| /* 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__ */ |
| |