struct obd_ops;
struct obd_device;
-#define OBD_LDLM_DEVICENAME "ldlm"
-
#define LDLM_DEFAULT_LRU_SIZE 100
typedef enum {
#define LDLM_FL_DISCARD_DATA 0x010000 /* discard (no writeback) on cancel */
#define LDLM_FL_CONFIG_CHANGE 0x020000 /* see ldlm_cli_cancel_unused */
-#define LDLM_FL_NO_TIMEOUT 0x020000 /* Blocked by group lock - wait
+#define LDLM_FL_NO_TIMEOUT 0x040000 /* Blocked by group lock - wait
* indefinitely */
/* file & record locking */
-#define LDLM_FL_BLOCK_NOWAIT 0x040000 /* server told not to wait if blocked */
-#define LDLM_FL_TEST_LOCK 0x080000 /* return blocking lock */
+#define LDLM_FL_BLOCK_NOWAIT 0x080000 /* server told not to wait if blocked */
+#define LDLM_FL_TEST_LOCK 0x100000 /* return blocking lock */
+#define LDLM_FL_GET_BLOCKING 0x200000 /* return updated blocking proc info */
+#define LDLM_FL_DEADLOCK_CHK 0x400000 /* check for deadlock */
+#define LDLM_FL_DEADLOCK_DEL 0x800000 /* lock no longer blocked */
/* These are flags that are mapped into the flags and ASTs of blocking locks */
#define LDLM_AST_DISCARD_DATA 0x80000000 /* Add FL_DISCARD to blocking ASTs */
* list. */
#define LDLM_FL_KMS_IGNORE 0x200000
+/* completion ast to be executed */
+#define LDLM_FL_CP_REQD 0x400000
+
+/* cleanup_resource has already handled the lock */
+#define LDLM_FL_CLEANED 0x800000
+
+/* optimization hint: LDLM can run blocking callback from current context
+ * w/o involving separate thread. in order to decrease cs rate */
+#define LDLM_FL_ATOMIC_CB 0x1000000
+
+/* while this flag is set, the lock can't change resource */
+#define LDLM_FL_LOCK_PROTECT 0x4000000
+#define LDLM_FL_LOCK_PROTECT_BIT 26
+
/* The blocking callback is overloaded to perform two functions. These flags
* indicate which operation should be performed. */
#define LDLM_CB_BLOCKING 1
-
*/
+/*
+ * Locking rules:
+ *
+ * lr_lock
+ *
+ * lr_lock
+ * waiting_locks_spinlock
+ *
+ * lr_lock
+ * led_lock
+ *
+ * lr_lock
+ * ns_unused_lock
+ *
+ * lr_lvb_sem
+ * lr_lock
+ *
+ */
+
struct ldlm_lock;
struct ldlm_resource;
struct ldlm_namespace;
char *ns_name;
__u32 ns_client; /* is this a client-side lock tree? */
struct list_head *ns_hash; /* hash table for ns */
+ spinlock_t ns_hash_lock;
__u32 ns_refcount; /* count of resources in the hash */
struct list_head ns_root_list; /* all root resources in ns */
- struct lustre_lock ns_lock; /* protects hash, refcount, list */
struct list_head ns_list_chain; /* position in global NS list */
/*
struct proc_dir_entry *ns_proc_dir;
struct list_head ns_unused_list; /* all root resources in ns */
int ns_nr_unused;
+ spinlock_t ns_unused_lock;
+
unsigned int ns_max_unused;
unsigned long ns_next_dump; /* next dump time */
- spinlock_t ns_counter_lock;
- __u64 ns_locks;
+ atomic_t ns_locks;
__u64 ns_resources;
ldlm_res_policy ns_policy;
struct ldlm_valblock_ops *ns_lvbo;
struct ldlm_lock {
struct portals_handle l_handle; // must be first in the structure
atomic_t l_refc;
+
+ /* 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;
+
+ /* protected by lr_lock */
struct list_head l_res_link; // position in one of three res lists
+
+ /* protected by led_lock */
struct list_head l_export_chain; // per-export chain of locks
+ /* protected by lr_lock */
ldlm_mode_t l_req_mode;
ldlm_mode_t l_granted_mode;
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_readers;
__u32 l_writers;
__u8 l_destroyed;
void *l_ast_data;
/* Server-side-only members */
+
+ /* protected by elt_lock */
struct list_head l_pending_chain; /* callbacks pending */
unsigned long l_callback_timeout;
__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 list_head l_cp_ast;
+ struct ldlm_lock *l_blocking_lock;
+ int l_bl_ast_run;
};
#define LDLM_PLAIN 10
struct ldlm_resource {
struct ldlm_namespace *lr_namespace;
+
+ /* protected by ns_hash_lock */
struct list_head lr_hash;
struct ldlm_resource *lr_parent; /* 0 for a root resource */
struct list_head lr_children; /* list head for child resources */
struct list_head lr_childof; /* part of ns_root_list if root res,
* part of lr_children if child */
+ spinlock_t lr_lock;
+ /* protected by lr_lock */
struct list_head lr_granted;
struct list_head lr_converting;
struct list_head lr_waiting;
ldlm_mode_t lr_most_restr;
__u32 lr_type; /* LDLM_PLAIN or LDLM_EXTENT */
- struct ldlm_resource *lr_root;
struct ldlm_res_id lr_name;
atomic_t lr_refcount;
if (lock->l_resource->lr_type == LDLM_FLOCK) { \
CDEBUG(level, "### " format \
" ns: %s lock: %p/"LPX64" lrc: %d/%d,%d mode: %s/%s " \
- "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s pid: " \
- LPU64" " "["LPU64"->"LPU64"] flags: %x remote: "LPX64 \
- " expref: %d pid: %u\n" , ## a, \
+ "res: "LPU64"/"LPU64"/"LPU64" rrc: %d type: %s " \
+ "pid: "LPU64" nid: "LPU64" ["LPU64"->"LPU64"] " \
+ "flags: %x remote: "LPX64" expref: %d pid: %u\n", ## a,\
lock->l_resource->lr_namespace->ns_name, lock, \
lock->l_handle.h_cookie, atomic_read(&lock->l_refc), \
lock->l_readers, lock->l_writers, \
atomic_read(&lock->l_resource->lr_refcount), \
ldlm_typename[lock->l_resource->lr_type], \
lock->l_policy_data.l_flock.pid, \
+ lock->l_policy_data.l_flock.nid, \
lock->l_policy_data.l_flock.start, \
lock->l_policy_data.l_flock.end, \
lock->l_flags, lock->l_remote_handle.cookie, \
CDEBUG(D_DLMTRACE, "### " format "\n" , ## a)
typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, int *flags,
- int first_enq, ldlm_error_t *err);
+ int first_enq, ldlm_error_t *err,
+ struct list_head *work_list);
/*
* Iterators.
/* ldlm_flock.c */
int ldlm_flock_completion_ast(struct ldlm_lock *lock, int flags, void *data);
+int ldlm_handle_flock_deadlock_check(struct ptlrpc_request *req);
/* ldlm_extent.c */
__u64 ldlm_extent_shift_kms(struct ldlm_lock *lock, __u64 old_kms);
#define IOC_LDLM_REGRESS_STOP _IOWR('f', 43, long)
#define IOC_LDLM_MAX_NR 43
+static inline void lock_res(struct ldlm_resource *res)
+{
+ spin_lock(&res->lr_lock);
+}
+
+static inline void unlock_res(struct ldlm_resource *res)
+{
+ spin_unlock(&res->lr_lock);
+}
+
+static inline void check_res_locked(struct ldlm_resource *res)
+{
+ LASSERT_SPIN_LOCKED(&res->lr_lock);
+}
+#ifdef __KERNEL__
+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);
+}
+#endif
+struct ldlm_resource * lock_res_and_lock(struct ldlm_lock *lock);
+void unlock_res_and_lock(struct ldlm_lock *lock);
+
#endif
git://git.whamcloud.com / fs / lustre-release.git / blobdiff