#define DLM_THREAD_SHUFFLE_INTERVAL 5 // flush everything every 5 passes
#define DLM_THREAD_MS 200 // flush at least every 200 ms
-#define DLM_HASH_BUCKETS (PAGE_SIZE / sizeof(struct hlist_head))
+#define DLM_HASH_SIZE_DEFAULT (1 << 14)
+#if DLM_HASH_SIZE_DEFAULT < PAGE_SIZE
+# define DLM_HASH_PAGES 1
+#else
+# define DLM_HASH_PAGES (DLM_HASH_SIZE_DEFAULT / PAGE_SIZE)
+#endif
+#define DLM_BUCKETS_PER_PAGE (PAGE_SIZE / sizeof(struct hlist_head))
+#define DLM_HASH_BUCKETS (DLM_HASH_PAGES * DLM_BUCKETS_PER_PAGE)
+
+/* Intended to make it easier for us to switch out hash functions */
+#define dlm_lockid_hash(_n, _l) full_name_hash(_n, _l)
enum dlm_ast_type {
DLM_AST = 0,
return 0;
}
-#define DLM_RECO_STATE_ACTIVE 0x0001
+#define DLM_RECO_STATE_ACTIVE 0x0001
+#define DLM_RECO_STATE_FINALIZE 0x0002
struct dlm_recovery_ctxt
{
struct dlm_ctxt
{
struct list_head list;
- struct hlist_head *lockres_hash;
+ struct hlist_head **lockres_hash;
struct list_head dirty_list;
struct list_head purge_list;
struct list_head pending_asts;
struct o2hb_callback_func dlm_hb_down;
struct task_struct *dlm_thread_task;
struct task_struct *dlm_reco_thread_task;
+ struct workqueue_struct *dlm_worker;
wait_queue_head_t dlm_thread_wq;
wait_queue_head_t dlm_reco_thread_wq;
wait_queue_head_t ast_wq;
struct list_head dlm_eviction_callbacks;
};
+static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
+{
+ return dlm->lockres_hash[(i / DLM_BUCKETS_PER_PAGE) % DLM_HASH_PAGES] + (i % DLM_BUCKETS_PER_PAGE);
+}
+
/* these keventd work queue items are for less-frequently
* called functions that cannot be directly called from the
* net message handlers for some reason, usually because
* they need to send net messages of their own. */
-void dlm_dispatch_work(void *data);
+void dlm_dispatch_work(struct work_struct *work);
struct dlm_lock_resource;
struct dlm_work_item;
unsigned ignore_higher:1;
};
+struct dlm_deref_lockres_priv
+{
+ struct dlm_lock_resource *deref_res;
+ u8 deref_node;
+};
struct dlm_work_item
{
struct dlm_request_all_locks_priv ral;
struct dlm_mig_lockres_priv ml;
struct dlm_assert_master_priv am;
+ struct dlm_deref_lockres_priv dl;
} u;
};
#define DLM_LOCK_RES_DIRTY 0x00000008
#define DLM_LOCK_RES_IN_PROGRESS 0x00000010
#define DLM_LOCK_RES_MIGRATING 0x00000020
+#define DLM_LOCK_RES_DROPPING_REF 0x00000040
+#define DLM_LOCK_RES_BLOCK_DIRTY 0x00001000
+#define DLM_LOCK_RES_SETREF_INPROG 0x00002000
/* max milliseconds to wait to sync up a network failure with a node death */
#define DLM_NODE_DEATH_WAIT_MAX (5 * 1000)
/* WARNING: Please see the comment in dlm_init_lockres before
* adding fields here. */
struct hlist_node hash_node;
+ struct qstr lockname;
struct kref refs;
- /* please keep these next 3 in this order
- * some funcs want to iterate over all lists */
+ /*
+ * Please keep granted, converting, and blocked in this order,
+ * as some funcs want to iterate over all lists.
+ *
+ * All four lists are protected by the hash's reference.
+ */
struct list_head granted;
struct list_head converting;
struct list_head blocked;
+ struct list_head purge;
+ /*
+ * These two lists require you to hold an additional reference
+ * while they are on the list.
+ */
struct list_head dirty;
struct list_head recovering; // dlm_recovery_ctxt.resources list
/* unused lock resources have their last_used stamped and are
* put on a list for the dlm thread to run. */
- struct list_head purge;
unsigned long last_used;
unsigned migration_pending:1;
wait_queue_head_t wq;
u8 owner; //node which owns the lock resource, or unknown
u16 state;
- struct qstr lockname;
char lvb[DLM_LVB_LEN];
+ unsigned int inflight_locks;
+ unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
};
struct dlm_migratable_lock
DLM_BLOCKED_LIST
};
+static inline int dlm_lvb_is_empty(char *lvb)
+{
+ int i;
+ for (i=0; i<DLM_LVB_LEN; i++)
+ if (lvb[i])
+ return 0;
+ return 1;
+}
+
static inline struct list_head *
dlm_list_idx_to_ptr(struct dlm_lock_resource *res, enum dlm_lockres_list idx)
{
DLM_CONVERT_LOCK_MSG, /* 504 */
DLM_PROXY_AST_MSG, /* 505 */
DLM_UNLOCK_LOCK_MSG, /* 506 */
- DLM_UNUSED_MSG2, /* 507 */
+ DLM_DEREF_LOCKRES_MSG, /* 507 */
DLM_MIGRATE_REQUEST_MSG, /* 508 */
DLM_MIG_LOCKRES_MSG, /* 509 */
DLM_QUERY_JOIN_MSG, /* 510 */
u8 name[O2NM_MAX_NAME_LEN];
};
+#define DLM_ASSERT_RESPONSE_REASSERT 0x00000001
+#define DLM_ASSERT_RESPONSE_MASTERY_REF 0x00000002
+
#define DLM_ASSERT_MASTER_MLE_CLEANUP 0x00000001
#define DLM_ASSERT_MASTER_REQUERY 0x00000002
#define DLM_ASSERT_MASTER_FINISH_MIGRATION 0x00000004
u8 name[O2NM_MAX_NAME_LEN];
};
+#define DLM_MIGRATE_RESPONSE_MASTERY_REF 0x00000001
+
struct dlm_migrate_request
{
u8 master;
};
+#define BITS_PER_BYTE 8
+#define BITS_TO_BYTES(bits) (((bits)+BITS_PER_BYTE-1)/BITS_PER_BYTE)
+
struct dlm_query_join_request
{
u8 node_idx;
u8 pad1[2];
u8 name_len;
u8 domain[O2NM_MAX_NAME_LEN];
+ u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)];
};
struct dlm_assert_joined
{
u8 node_idx;
u8 dead_node;
- __be16 pad1;
+ u8 flags;
+ u8 pad1;
__be32 pad2;
};
+struct dlm_deref_lockres
+{
+ u32 pad1;
+ u16 pad2;
+ u8 node_idx;
+ u8 namelen;
+
+ u8 name[O2NM_MAX_NAME_LEN];
+};
+
static inline enum dlm_status
__dlm_lockres_state_to_status(struct dlm_lock_resource *res)
{
void dlm_lock_attach_lockres(struct dlm_lock *lock,
struct dlm_lock_resource *res);
-int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data);
+int dlm_create_lock_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_convert_lock_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_proxy_ast_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
void dlm_revert_pending_convert(struct dlm_lock_resource *res,
struct dlm_lock *lock);
void dlm_revert_pending_lock(struct dlm_lock_resource *res,
struct dlm_lock *lock);
-int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data);
+int dlm_unlock_lock_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
void dlm_commit_pending_cancel(struct dlm_lock_resource *res,
struct dlm_lock *lock);
void dlm_commit_pending_unlock(struct dlm_lock_resource *res,
void dlm_kick_recovery_thread(struct dlm_ctxt *dlm);
int dlm_is_node_dead(struct dlm_ctxt *dlm, u8 node);
int dlm_wait_for_node_death(struct dlm_ctxt *dlm, u8 node, int timeout);
+int dlm_wait_for_node_recovery(struct dlm_ctxt *dlm, u8 node, int timeout);
void dlm_put(struct dlm_ctxt *dlm);
struct dlm_ctxt *dlm_grab(struct dlm_ctxt *dlm);
struct dlm_lock_resource *res);
void dlm_lockres_calc_usage(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res);
-void dlm_purge_lockres(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *lockres);
-void dlm_lockres_get(struct dlm_lock_resource *res);
+static inline void dlm_lockres_get(struct dlm_lock_resource *res)
+{
+ /* This is called on every lookup, so it might be worth
+ * inlining. */
+ kref_get(&res->refs);
+}
void dlm_lockres_put(struct dlm_lock_resource *res);
void __dlm_unhash_lockres(struct dlm_lock_resource *res);
void __dlm_insert_lockres(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res);
+struct dlm_lock_resource * __dlm_lookup_lockres_full(struct dlm_ctxt *dlm,
+ const char *name,
+ unsigned int len,
+ unsigned int hash);
struct dlm_lock_resource * __dlm_lookup_lockres(struct dlm_ctxt *dlm,
const char *name,
- unsigned int len);
+ unsigned int len,
+ unsigned int hash);
struct dlm_lock_resource * dlm_lookup_lockres(struct dlm_ctxt *dlm,
const char *name,
unsigned int len);
u8 owner);
struct dlm_lock_resource * dlm_get_lock_resource(struct dlm_ctxt *dlm,
const char *lockid,
+ int namelen,
int flags);
struct dlm_lock_resource *dlm_new_lockres(struct dlm_ctxt *dlm,
const char *name,
unsigned int namelen);
+#define dlm_lockres_set_refmap_bit(bit,res) \
+ __dlm_lockres_set_refmap_bit(bit,res,__FILE__,__LINE__)
+#define dlm_lockres_clear_refmap_bit(bit,res) \
+ __dlm_lockres_clear_refmap_bit(bit,res,__FILE__,__LINE__)
+
+static inline void __dlm_lockres_set_refmap_bit(int bit,
+ struct dlm_lock_resource *res,
+ const char *file,
+ int line)
+{
+ //printk("%s:%d:%.*s: setting bit %d\n", file, line,
+ // res->lockname.len, res->lockname.name, bit);
+ set_bit(bit, res->refmap);
+}
+
+static inline void __dlm_lockres_clear_refmap_bit(int bit,
+ struct dlm_lock_resource *res,
+ const char *file,
+ int line)
+{
+ //printk("%s:%d:%.*s: clearing bit %d\n", file, line,
+ // res->lockname.len, res->lockname.name, bit);
+ clear_bit(bit, res->refmap);
+}
+
+void __dlm_lockres_drop_inflight_ref(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res,
+ const char *file,
+ int line);
+void __dlm_lockres_grab_inflight_ref(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res,
+ int new_lockres,
+ const char *file,
+ int line);
+#define dlm_lockres_drop_inflight_ref(d,r) \
+ __dlm_lockres_drop_inflight_ref(d,r,__FILE__,__LINE__)
+#define dlm_lockres_grab_inflight_ref(d,r) \
+ __dlm_lockres_grab_inflight_ref(d,r,0,__FILE__,__LINE__)
+#define dlm_lockres_grab_inflight_ref_new(d,r) \
+ __dlm_lockres_grab_inflight_ref(d,r,1,__FILE__,__LINE__)
+
void dlm_queue_ast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
void dlm_queue_bast(struct dlm_ctxt *dlm, struct dlm_lock *lock);
void dlm_do_local_ast(struct dlm_ctxt *dlm,
void dlm_hb_node_down_cb(struct o2nm_node *node, int idx, void *data);
void dlm_hb_node_up_cb(struct o2nm_node *node, int idx, void *data);
-int dlm_lockres_is_dirty(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
-int dlm_migrate_lockres(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res,
- u8 target);
+int dlm_empty_lockres(struct dlm_ctxt *dlm, struct dlm_lock_resource *res);
int dlm_finish_migration(struct dlm_ctxt *dlm,
struct dlm_lock_resource *res,
u8 old_master);
struct dlm_lock_resource *res);
void __dlm_lockres_reserve_ast(struct dlm_lock_resource *res);
-int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data);
-int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data);
+int dlm_master_request_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_assert_master_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+void dlm_assert_master_post_handler(int status, void *data, void *ret_data);
+int dlm_deref_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_migrate_request_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_mig_lockres_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_master_requery_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_request_all_locks_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_reco_data_done_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_begin_reco_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
+int dlm_finalize_reco_handler(struct o2net_msg *msg, u32 len, void *data,
+ void **ret_data);
int dlm_do_master_requery(struct dlm_ctxt *dlm, struct dlm_lock_resource *res,
u8 nodenum, u8 *real_master);
-int dlm_lockres_master_requery(struct dlm_ctxt *dlm,
- struct dlm_lock_resource *res, u8 *real_master);
int dlm_dispatch_assert_master(struct dlm_ctxt *dlm,
int dlm_init_mle_cache(void);
void dlm_destroy_mle_cache(void);
void dlm_hb_event_notify_attached(struct dlm_ctxt *dlm, int idx, int node_up);
+int dlm_drop_lockres_ref(struct dlm_ctxt *dlm,
+ struct dlm_lock_resource *res);
void dlm_clean_master_list(struct dlm_ctxt *dlm,
u8 dead_node);
int dlm_lock_basts_flushed(struct dlm_ctxt *dlm, struct dlm_lock *lock);
-
+int __dlm_lockres_has_locks(struct dlm_lock_resource *res);
+int __dlm_lockres_unused(struct dlm_lock_resource *res);
static inline const char * dlm_lock_mode_name(int mode)
{
projects / firefly-linux-kernel-4.4.55.git / blobdiff