Viewing: ldlm_internal.h
/* SPDX-License-Identifier: GPL-2.0 */
/*
* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
* Copyright (c) 2011, 2017, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
*/
extern int ldlm_srv_namespace_nr;
extern int ldlm_cli_namespace_nr;
extern struct mutex ldlm_srv_namespace_lock;
extern struct list_head ldlm_srv_namespace_list;
extern struct mutex ldlm_cli_namespace_lock;
extern struct list_head ldlm_cli_active_namespace_list;
extern struct list_head ldlm_cli_inactive_namespace_list;
extern unsigned int ldlm_cancel_unused_locks_before_replay;
extern struct kmem_cache *ldlm_glimpse_work_kmem;
static inline int ldlm_namespace_nr_read(enum ldlm_side client)
{
return client == LDLM_NAMESPACE_SERVER ?
ldlm_srv_namespace_nr : ldlm_cli_namespace_nr;
}
static inline void ldlm_namespace_nr_inc(enum ldlm_side client)
{
if (client == LDLM_NAMESPACE_SERVER)
ldlm_srv_namespace_nr++;
else
ldlm_cli_namespace_nr++;
}
static inline void ldlm_namespace_nr_dec(enum ldlm_side client)
{
if (client == LDLM_NAMESPACE_SERVER)
ldlm_srv_namespace_nr--;
else
ldlm_cli_namespace_nr--;
}
static inline struct list_head *ldlm_namespace_list(enum ldlm_side client)
{
return client == LDLM_NAMESPACE_SERVER ?
&ldlm_srv_namespace_list : &ldlm_cli_active_namespace_list;
}
static inline
struct list_head *ldlm_namespace_inactive_list(enum ldlm_side client)
{
return client == LDLM_NAMESPACE_SERVER ?
&ldlm_srv_namespace_list : &ldlm_cli_inactive_namespace_list;
}
static inline struct mutex *ldlm_namespace_lock(enum ldlm_side client)
{
return client == LDLM_NAMESPACE_SERVER ?
&ldlm_srv_namespace_lock : &ldlm_cli_namespace_lock;
}
/* ns_bref is the number of resources in this namespace */
static inline int ldlm_ns_empty(struct ldlm_namespace *ns)
{
return atomic_read(&ns->ns_bref) == 0;
}
void ldlm_namespace_move_to_active_locked(struct ldlm_namespace *l,
enum ldlm_side);
void ldlm_namespace_move_to_inactive_locked(struct ldlm_namespace *l,
enum ldlm_side);
struct ldlm_namespace *ldlm_namespace_first_locked(enum ldlm_side);
/* ldlm_request.c */
int ldlm_cancel_lru(struct ldlm_namespace *ns, int min,
enum ldlm_cancel_flags cancel_flags,
enum ldlm_lru_flags lru_flags);
int ldlm_cancel_lru_local(struct ldlm_namespace *ns,
struct list_head *cancels, int min, int max,
enum ldlm_cancel_flags cancel_flags,
enum ldlm_lru_flags lru_flags);
extern unsigned int ldlm_enqueue_min;
/* ldlm_resource.c */
extern struct kmem_cache *ldlm_resource_slab;
extern struct kmem_cache *ldlm_lock_slab;
extern struct kmem_cache *ldlm_inodebits_slab;
extern struct kmem_cache *ldlm_interval_tree_slab;
void ldlm_resource_insert_lock_after(struct ldlm_lock *original,
struct ldlm_lock *new);
void ldlm_resource_insert_lock_before(struct ldlm_lock *original,
struct ldlm_lock *new);
/* ldlm_lock.c */
typedef enum {
LDLM_WORK_BL_AST,
LDLM_WORK_CP_AST,
LDLM_WORK_REVOKE_AST,
LDLM_WORK_GL_AST
} ldlm_desc_ast_t;
void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
void ldlm_grant_lock(struct ldlm_lock *lock, struct list_head *work_list);
int ldlm_fill_lvb(struct ldlm_lock *lock, struct req_capsule *pill,
enum req_location loc, void *data, int size);
struct ldlm_lock *ldlm_lock_create(struct ldlm_namespace *ns,
const struct ldlm_res_id *res,
enum ldlm_type type, enum ldlm_mode mode,
const struct ldlm_callback_suite *cbs,
void *data, __u32 lvb_len,
enum lvb_type lvb_type);
enum ldlm_error ldlm_lock_enqueue(const struct lu_env *env,
struct ldlm_namespace *l,
struct ldlm_lock **lock,
void *cookie, __u64 *flags);
void ldlm_lock_addref_internal(struct ldlm_lock *l, enum ldlm_mode mode);
void ldlm_lock_addref_internal_nolock(struct ldlm_lock *l, enum ldlm_mode mode);
void ldlm_lock_decref_internal(struct ldlm_lock *l, enum ldlm_mode mode);
void ldlm_lock_decref_internal_nolock(struct ldlm_lock *l,
enum ldlm_mode mode);
void ldlm_add_ast_work_item(struct ldlm_lock *lock, struct ldlm_lock *new,
struct list_head *work_list);
#ifdef CONFIG_LUSTRE_FS_SERVER
int ldlm_reprocess_queue(struct ldlm_resource *res, struct list_head *queue,
struct list_head *work_list,
enum ldlm_process_intention intention,
enum mds_ibits_locks hint);
int ldlm_handle_conflict_lock(struct ldlm_lock *lock, __u64 *flags,
struct list_head *rpc_list);
void ldlm_discard_bl_list(struct list_head *bl_list);
void ldlm_clear_blocking_lock(struct ldlm_lock *lock);
void ldlm_clear_blocking_data(struct ldlm_lock *lock);
#endif
int ldlm_run_ast_work(struct ldlm_namespace *ns, struct list_head *rpc_list,
ldlm_desc_ast_t ast_type);
int ldlm_work_gl_ast_lock(struct ptlrpc_request_set *rqset, void *opaq);
int ldlm_lock_remove_from_lru_check(struct ldlm_lock *lock, ktime_t last_use,
bool reuse);
#define ldlm_lock_remove_from_lru(lock) \
ldlm_lock_remove_from_lru_check(lock, ktime_set(0, 0), false)
int ldlm_lock_remove_from_lru_nolock(struct ldlm_lock *lock);
void ldlm_lock_add_to_lru_nolock(struct ldlm_lock *lock);
void ldlm_lock_lru_demote_to_normal_nolock(struct ldlm_lock *lock);
void ldlm_lock_touch_in_lru(struct ldlm_lock *lock);
void ldlm_lock_destroy_nolock(struct ldlm_lock *lock);
int ldlm_export_cancel_blocked_locks(struct obd_export *exp);
int ldlm_export_cancel_locks(struct obd_export *exp);
void ldlm_grant_lock_with_skiplist(struct ldlm_lock *lock);
/* ldlm_lockd.c */
int ldlm_bl_to_thread_lock(struct ldlm_namespace *ns, struct ldlm_lock_desc *ld,
struct ldlm_lock *lock);
int ldlm_bl_to_thread_list(struct ldlm_namespace *ns,
struct ldlm_lock_desc *ld,
struct list_head *cancels, int count,
enum ldlm_cancel_flags cancel_flags);
int ldlm_bl_to_thread_ns(struct ldlm_namespace *ns);
int ldlm_bl_thread_wakeup(void);
void ldlm_handle_bl_callback(struct ldlm_namespace *ns,
struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
void ldlm_bl_desc2lock(const struct ldlm_lock_desc *ld, struct ldlm_lock *lock);
#ifdef CONFIG_LUSTRE_FS_SERVER
/* ldlm_plain.c */
int ldlm_process_plain_lock(struct ldlm_lock *lock, __u64 *flags,
enum ldlm_process_intention intention,
enum ldlm_error *err, struct list_head *work_list);
/* ldlm_inodebits.c */
int ldlm_process_inodebits_lock(struct ldlm_lock *lock, __u64 *flags,
enum ldlm_process_intention intention,
enum ldlm_error *err,
struct list_head *work_list);
int ldlm_reprocess_inodebits_queue(struct ldlm_resource *res,
struct list_head *queue,
struct list_head *work_list,
enum ldlm_process_intention intention,
enum mds_ibits_locks hint);
/* ldlm_extent.c */
int ldlm_process_extent_lock(struct ldlm_lock *lock, __u64 *flags,
enum ldlm_process_intention intention,
enum ldlm_error *err, struct list_head *work_list);
#endif
void ldlm_extent_add_lock(struct ldlm_resource *res, struct ldlm_lock *lock);
void ldlm_extent_unlink_lock(struct ldlm_lock *lock);
void ldlm_extent_search(struct rb_root_cached *root,
u64 start, u64 end,
bool (*matches)(struct ldlm_lock *lock, void *data),
void *data);
int ldlm_inodebits_alloc_lock(struct ldlm_lock *lock);
void ldlm_inodebits_add_lock(struct ldlm_resource *res, struct list_head *head,
struct ldlm_lock *lock, bool tail);
void ldlm_inodebits_unlink_lock(struct ldlm_lock *lock);
/* ldlm_flock.c */
int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
enum ldlm_process_intention intention,
enum ldlm_error *err, struct list_head *work_list);
int ldlm_init_flock_export(struct obd_export *exp);
void ldlm_destroy_flock_export(struct obd_export *exp);
void ldlm_flock_add_lock(struct ldlm_resource *req, struct list_head *head,
struct ldlm_lock *lock);
void ldlm_flock_unlink_lock(struct ldlm_lock *lock);
/* l_lock.c */
void l_check_ns_lock(struct ldlm_namespace *ns);
void l_check_no_ns_lock(struct ldlm_namespace *ns);
extern struct dentry *ldlm_svc_debugfs_dir;
struct ldlm_state {
struct ptlrpc_service *ldlm_cb_service;
struct ptlrpc_service *ldlm_cancel_service;
struct ptlrpc_client *ldlm_client;
struct ldlm_bl_pool *ldlm_bl_pool;
};
int ldlm_init(void);
void ldlm_exit(void);
enum ldlm_policy_res {
LDLM_POLICY_CANCEL_LOCK,
LDLM_POLICY_KEEP_LOCK,
LDLM_POLICY_SKIP_LOCK
};
#define LDLM_POOL_SYSFS_PRINT_int(v) sprintf(buf, "%d\n", v)
#define LDLM_POOL_SYSFS_SET_int(a, b) { a = b; }
#define LDLM_POOL_SYSFS_PRINT_u64(v) sprintf(buf, "%lld\n", v)
#define LDLM_POOL_SYSFS_SET_u64(a, b) { a = b; }
#define LDLM_POOL_SYSFS_PRINT_atomic(v) sprintf(buf, "%d\n", atomic_read(&v))
#define LDLM_POOL_SYSFS_SET_atomic(a, b) atomic_set(&a, b)
#define LDLM_POOL_SYSFS_READER_SHOW(var, type) \
static ssize_t var##_show(struct kobject *kobj, \
struct attribute *attr, \
char *buf) \
{ \
struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
pl_kobj); \
type tmp; \
\
spin_lock(&pl->pl_lock); \
tmp = pl->pl_##var; \
spin_unlock(&pl->pl_lock); \
\
return LDLM_POOL_SYSFS_PRINT_##type(tmp); \
} \
struct __##var##__dummy_read { ; } /* semicolon catcher */
#define LDLM_POOL_SYSFS_WRITER_STORE(var, type) \
static ssize_t var##_store(struct kobject *kobj, \
struct attribute *attr, \
const char *buffer, \
size_t count) \
{ \
struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
pl_kobj); \
unsigned long tmp; \
int rc; \
\
rc = kstrtoul(buffer, 10, &tmp); \
if (rc < 0) { \
return rc; \
} \
\
spin_lock(&pl->pl_lock); \
LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
spin_unlock(&pl->pl_lock); \
\
return count; \
} \
struct __##var##__dummy_write {; } /* semicolon catcher */
#define LDLM_POOL_SYSFS_READER_NOLOCK_SHOW(var, type) \
static ssize_t var##_show(struct kobject *kobj, \
struct attribute *attr, \
char *buf) \
{ \
struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
pl_kobj); \
\
return LDLM_POOL_SYSFS_PRINT_##type(pl->pl_##var); \
} \
struct __##var##__dummy_read {; } /* semicolon catcher */
#define LDLM_POOL_SYSFS_WRITER_NOLOCK_STORE(var, type) \
static ssize_t var##_store(struct kobject *kobj, \
struct attribute *attr, \
const char *buffer, \
size_t count) \
{ \
struct ldlm_pool *pl = container_of(kobj, struct ldlm_pool,\
pl_kobj); \
unsigned long tmp; \
int rc; \
\
rc = kstrtoul(buffer, 10, &tmp); \
if (rc < 0) { \
return rc; \
} \
\
LDLM_POOL_SYSFS_SET_##type(pl->pl_##var, tmp); \
\
return count; \
} \
struct __##var##__dummy_write {; } /* semicolon catcher */
static inline void
ldlm_add_var(struct ldebugfs_vars *vars, struct dentry *debugfs_entry,
const char *name, void *data, const struct file_operations *ops)
{
vars->name = name;
vars->data = data;
vars->fops = ops;
ldebugfs_add_vars(debugfs_entry, vars, NULL);
}
static inline int is_granted_or_cancelled(struct ldlm_lock *lock)
{
int ret = 0;
lock_res_and_lock(lock);
ret = is_granted_or_cancelled_nolock(lock);
unlock_res_and_lock(lock);
return ret;
}
static inline bool is_bl_done(struct ldlm_lock *lock)
{
bool bl_done = true;
if (!ldlm_is_bl_done(lock)) {
lock_res_and_lock(lock);
bl_done = ldlm_is_bl_done(lock);
unlock_res_and_lock(lock);
}
return bl_done;
}
static inline bool is_lock_converted(struct ldlm_lock *lock)
{
bool ret = 0;
lock_res_and_lock(lock);
ret = (lock->l_policy_data.l_inodebits.cancel_bits ==
MDS_INODELOCK_NONE);
unlock_res_and_lock(lock);
return ret;
}
typedef void (*ldlm_policy_wire_to_local_t)(const union ldlm_wire_policy_data *,
union ldlm_policy_data *);
typedef void (*ldlm_policy_local_to_wire_t)(const union ldlm_policy_data *,
union ldlm_wire_policy_data *);
void ldlm_plain_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
union ldlm_policy_data *lpolicy);
void ldlm_plain_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
union ldlm_wire_policy_data *wpolicy);
void ldlm_ibits_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
union ldlm_policy_data *lpolicy);
void ldlm_ibits_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
union ldlm_wire_policy_data *wpolicy);
void ldlm_extent_policy_wire_to_local(const union ldlm_wire_policy_data *wpol,
union ldlm_policy_data *lpolicy);
void ldlm_extent_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
union ldlm_wire_policy_data *wpolicy);
void ldlm_flock_policy_wire_to_local(const union ldlm_wire_policy_data *wpolicy,
union ldlm_policy_data *lpolicy);
void ldlm_flock_policy_local_to_wire(const union ldlm_policy_data *lpolicy,
union ldlm_wire_policy_data *wpolicy);
/* ldlm_reclaim.c */
#ifdef CONFIG_LUSTRE_FS_SERVER
extern u64 ldlm_reclaim_threshold;
extern u64 ldlm_lock_limit;
extern u64 ldlm_reclaim_threshold_mb;
extern u64 ldlm_lock_limit_mb;
extern struct percpu_counter ldlm_granted_total;
/*
* Per-lock memory cost estimate including associated structures.
* Each lock has a corresponding ldlm_resource (roughly 1:1 in real
* workloads) and an ldlm_ibits_node (always 1:1 for server IBITS locks,
* which dominate on MDTs). Using sizeof(struct ldlm_lock) alone
* underestimates the true cost by ~1.5x.
*/
#define LDLM_LOCK_MEM_OVERHEAD (sizeof(struct ldlm_lock) + \
sizeof(struct ldlm_resource) + \
sizeof(struct ldlm_ibits_node))
#endif
extern unsigned int ldlm_dump_granted_max;
int ldlm_reclaim_setup(void);
void ldlm_reclaim_cleanup(void);
void ldlm_reclaim_add(struct ldlm_lock *lock);
void ldlm_reclaim_del(struct ldlm_lock *lock);
bool ldlm_reclaim_full(void);
static inline bool ldlm_res_eq(const struct ldlm_res_id *res0,
const struct ldlm_res_id *res1)
{
return memcmp(res0, res1, sizeof(*res0)) == 0;
}
/* ldlm_cache_policy.c */
extern struct ldlm_lock_cache_ops ldlm_lru_cache_ops;
extern struct ldlm_lock_cache_ops ldlm_lfru_cache_ops;
