#define OBD_LDLM_DEVICENAME "ldlm"
#define LDLM_DEFAULT_LRU_SIZE (100 * smp_num_cpus)
+#define LDLM_DEFAULT_MAX_ALIVE (cfs_time_seconds(36000))
typedef enum {
ELDLM_OK = 0,
* w/o involving separate thread. in order to decrease cs rate */
#define LDLM_FL_ATOMIC_CB 0x4000000
-/* while this flag is set, the lock can't change resource */
-#define LDLM_FL_LOCK_PROTECT 0x8000000
-#define LDLM_FL_LOCK_PROTECT_BIT 27
-
+/* It may happen that a client initiate 2 operations, e.g. unlink and mkdir,
+ * such that server send blocking ast for conflict locks to this client for
+ * the 1st operation, whereas the 2nd operation has canceled this lock and
+ * is waiting for rpc_lock which is taken by the 1st operation.
+ * LDLM_FL_BL_AST is to be set by ldlm_callback_handler() to the lock not allow
+ * ELC code to cancel it.
+ * LDLM_FL_BL_DONE is to be set by ldlm_cancel_callback() when lock cache is
+ * droped to let ldlm_callback_handler() return EINVAL to the server. It is
+ * used when ELC rpc is already prepared and is waiting for rpc_lock, too late
+ * to send a separate CANCEL rpc. */
+#define LDLM_FL_BL_AST 0x10000000
+#define LDLM_FL_BL_DONE 0x20000000
+
+/* Cancel lock asynchronously. See ldlm_cli_cancel_unused_resource. */
+#define LDLM_FL_ASYNC 0x40000000
/* The blocking callback is overloaded to perform two functions. These flags
* indicate which operation should be performed. */
#define LCK_COMPAT_PR (LCK_COMPAT_PW | LCK_PR)
#define LCK_COMPAT_CW (LCK_COMPAT_PW | LCK_CW)
#define LCK_COMPAT_CR (LCK_COMPAT_CW | LCK_PR | LCK_PW)
-#define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX)
+#define LCK_COMPAT_NL (LCK_COMPAT_CR | LCK_EX | LCK_GROUP)
#define LCK_COMPAT_GROUP (LCK_GROUP | LCK_NL)
extern ldlm_mode_t lck_compat_array[];
spinlock_t ns_unused_lock;
unsigned int ns_max_unused;
+ unsigned int ns_max_age;
cfs_time_t ns_next_dump; /* next debug dump, jiffies */
atomic_t ns_locks;
struct portals_handle l_handle; // must be first in the structure
atomic_t l_refc;
+ /* internal spinlock protects l_resource. we should hold this lock
+ * first before grabbing res_lock.*/
+ spinlock_t l_lock;
+
/* ldlm_lock_change_resource() can change this */
struct ldlm_resource *l_resource;
- /* set once, no need to protect it */
- struct ldlm_lock *l_parent;
-
- /* protected by ns_hash_lock */
- struct list_head l_children;
- struct list_head l_childof;
-
/* protected by ns_hash_lock. FIXME */
struct list_head l_lru;
struct obd_export *l_export;
struct obd_export *l_conn_export;
- /* protected by lr_lock */
- __u32 l_flags;
-
struct lustre_handle l_remote_handle;
ldlm_policy_data_t l_policy_data;
/* protected by lr_lock */
+ __u32 l_flags;
__u32 l_readers;
__u32 l_writers;
__u8 l_destroyed;
cfs_time_t l_callback_timeout; /* jiffies */
__u32 l_pid; /* pid which created this lock */
- __u32 l_pidb; /* who holds LOCK_PROTECT_BIT */
-
- struct list_head l_tmp;
/* for ldlm_add_ast_work_item() */
struct list_head l_bl_ast;
struct semaphore lr_lvb_sem;
__u32 lr_lvb_len;
void *lr_lvb_data;
-
- /* lr_tmp holds a list head temporarily, during the building of a work
- * queue. see ldlm_add_ast_work_item and ldlm_run_ast_work */
- void *lr_tmp;
};
struct ldlm_ast_work {
int w_datalen;
};
+/* ldlm_enqueue parameters common */
+struct ldlm_enqueue_info {
+ __u32 ei_type; /* Type of the lock being enqueued. */
+ __u32 ei_mode; /* Mode of the lock being enqueued. */
+ void *ei_cb_bl; /* Different callbacks for lock handling (blocking, */
+ void *ei_cb_cp; /* completion, glimpse) */
+ void *ei_cb_gl;
+ void *ei_cbdata; /* Data to be passed into callbacks. */
+};
+
extern struct obd_ops ldlm_obd_ops;
extern char *ldlm_lockname[];
void ldlm_resource_iterate(struct ldlm_namespace *, const struct ldlm_res_id *,
ldlm_iterator_t iter, void *data);
-
/* ldlm_flock.c */
int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
ldlm_blocking_callback, ldlm_glimpse_callback);
int ldlm_handle_convert(struct ptlrpc_request *req);
int ldlm_handle_cancel(struct ptlrpc_request *req);
+int ldlm_request_cancel(struct ptlrpc_request *req,
+ const struct ldlm_request *dlm_req, int first);
int ldlm_del_waiting_lock(struct ldlm_lock *lock);
int ldlm_refresh_waiting_lock(struct ldlm_lock *lock);
void ldlm_revoke_export_locks(struct obd_export *exp);
return __ldlm_handle2lock(h, 0);
}
+static inline int ldlm_res_lvbo_update(struct ldlm_resource *res,
+ struct lustre_msg *m, int buf_idx,
+ int increase)
+{
+ if (res->lr_namespace->ns_lvbo &&
+ res->lr_namespace->ns_lvbo->lvbo_update) {
+ return res->lr_namespace->ns_lvbo->lvbo_update(res, m, buf_idx,
+ increase);
+ }
+ return 0;
+}
+
#define LDLM_LOCK_PUT(lock) \
do { \
/*LDLM_DEBUG((lock), "put");*/ \
lock; \
})
+#define ldlm_lock_list_put(head, member, count) \
+({ \
+ struct ldlm_lock *_lock, *_next; \
+ int c = count; \
+ list_for_each_entry_safe(_lock, _next, head, member) { \
+ list_del_init(&_lock->member); \
+ LDLM_LOCK_PUT(_lock); \
+ if (--c == 0) \
+ break; \
+ } \
+})
+
struct ldlm_lock *ldlm_lock_get(struct ldlm_lock *lock);
void ldlm_lock_put(struct ldlm_lock *lock);
void ldlm_lock_destroy(struct ldlm_lock *lock);
int ldlm_glimpse_ast(struct ldlm_lock *lock, void *reqp);
int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data);
int ldlm_cli_enqueue(struct obd_export *exp, struct ptlrpc_request **reqp,
+ struct ldlm_enqueue_info *einfo,
const struct ldlm_res_id *res_id,
- ldlm_type_t type, ldlm_policy_data_t *policy,
- ldlm_mode_t mode, int *flags,
- ldlm_blocking_callback blocking,
- ldlm_completion_callback completion,
- ldlm_glimpse_callback glimpse,
- void *data, void *lvb, __u32 lvb_len, void *lvb_swabber,
+ ldlm_policy_data_t *policy, int *flags,
+ void *lvb, __u32 lvb_len, void *lvb_swabber,
struct lustre_handle *lockh, int async);
+struct ptlrpc_request *ldlm_prep_enqueue_req(struct obd_export *exp,
+ int bufcount, int *size,
+ struct list_head *head, int count);
int ldlm_handle_enqueue0(struct ldlm_namespace *ns, struct ptlrpc_request *req,
const struct ldlm_request *dlm_req,
const struct ldlm_callback_suite *cbs);
int ldlm_cli_cancel(struct lustre_handle *lockh);
int ldlm_cli_cancel_unused(struct ldlm_namespace *, const struct ldlm_res_id *,
int flags, void *opaque);
+int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
+ const struct ldlm_res_id *res_id,
+ ldlm_policy_data_t *policy,
+ ldlm_mode_t mode, int flags, void *opaque);
+int ldlm_cli_cancel_req(struct obd_export *exp, struct list_head *head,
+ int count, int flags);
int ldlm_cli_join_lru(struct ldlm_namespace *,
const struct ldlm_res_id *, int join);
-
+int ldlm_cancel_resource_local(struct ldlm_resource *res,
+ struct list_head *cancels,
+ ldlm_policy_data_t *policy,
+ ldlm_mode_t mode, int lock_flags,
+ int flags, void *opaque);
+int ldlm_cli_cancel_list(struct list_head *head, int count,
+ struct ptlrpc_request *req, int off, int flags);
+
/* mds/handler.c */
/* This has to be here because recursive inclusion sucks. */
int intent_disposition(struct ldlm_reply *rep, int flag);
{
LASSERT_SPIN_LOCKED(&res->lr_lock);
}
-#ifdef __KERNEL__
-# if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60)
-static inline void lock_bitlock(struct ldlm_lock *lock)
-{
- bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
- LASSERT(lock->l_pidb == 0);
- lock->l_pidb = current->pid;
-}
-
-static inline void unlock_bitlock(struct ldlm_lock *lock)
-{
- LASSERT(lock->l_pidb == current->pid);
- lock->l_pidb = 0;
- bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *) &lock->l_flags);
-}
-#else /* LINUX_VERSION_CODE < KERNEL_VERSION(2,5,60) */
-static inline void lock_bitlock(struct ldlm_lock *lock)
-{
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
- /* bit_spin_lock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
- while (test_and_set_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags)) {
- while (test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags))
- cpu_relax();
- }
-#endif
- LASSERT(lock->l_pidb == 0);
- lock->l_pidb = current->pid;
-}
-
-static inline void unlock_bitlock(struct ldlm_lock *lock)
-{
- LASSERT(lock->l_pidb == current->pid);
- lock->l_pidb = 0;
-
-#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
- /* bit_spin_unlock(LDLM_FL_LOCK_PROTECT_BIT, (void *)&lock->l_flags);*/
- BUG_ON(!test_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags));
- smp_mb__before_clear_bit();
- clear_bit(LDLM_FL_LOCK_PROTECT_BIT, &lock->l_flags);
-#endif
-}
-#endif /* LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,60) */
-#else /* !__KERNEL__ */
-static inline void lock_bitlock(struct ldlm_lock *lock)
-{
- lock->l_flags |= 1 << LDLM_FL_LOCK_PROTECT_BIT;
-}
-
-static inline void unlock_bitlock(struct ldlm_lock *lock)
-{
- lock->l_flags &= ~(1 << LDLM_FL_LOCK_PROTECT_BIT);
-}
-#endif /* __KERNEL__ */
struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
void unlock_res_and_lock(struct ldlm_lock *lock);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff