/* 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_mle_type {
+ DLM_MLE_BLOCK,
+ DLM_MLE_MASTER,
+ DLM_MLE_MIGRATION
+};
+
+struct dlm_lock_name {
+ u8 len;
+ u8 name[DLM_LOCKID_NAME_MAX];
+};
+
+struct dlm_master_list_entry {
+ struct list_head list;
+ struct list_head hb_events;
+ struct dlm_ctxt *dlm;
+ spinlock_t spinlock;
+ wait_queue_head_t wq;
+ atomic_t woken;
+ struct kref mle_refs;
+ int inuse;
+ unsigned long maybe_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
+ unsigned long vote_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
+ unsigned long response_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
+ unsigned long node_map[BITS_TO_LONGS(O2NM_MAX_NODES)];
+ u8 master;
+ u8 new_master;
+ enum dlm_mle_type type;
+ struct o2hb_callback_func mle_hb_up;
+ struct o2hb_callback_func mle_hb_down;
+ union {
+ struct dlm_lock_resource *res;
+ struct dlm_lock_name name;
+ } u;
+};
+
enum dlm_ast_type {
DLM_AST = 0,
DLM_BAST,
struct list_head purge_list;
struct list_head pending_asts;
struct list_head pending_basts;
+ struct list_head tracking_list;
unsigned int purge_count;
spinlock_t spinlock;
spinlock_t ast_lock;
atomic_t remote_resources;
atomic_t unknown_resources;
+ struct dlm_debug_ctxt *dlm_debug_ctxt;
+ struct dentry *dlm_debugfs_subroot;
+
/* NOTE: Next three are protected by dlm_domain_lock */
struct kref dlm_refs;
enum dlm_ctxt_state dlm_state;
spinlock_t work_lock;
struct list_head dlm_domain_handlers;
struct list_head dlm_eviction_callbacks;
+
+ /* The filesystem specifies this at domain registration. We
+ * cache it here to know what to tell other nodes. */
+ struct dlm_protocol_version fs_locking_proto;
+ /* This is the inter-dlm communication version */
+ struct dlm_protocol_version dlm_locking_proto;
};
static inline struct hlist_head *dlm_lockres_hash(struct dlm_ctxt *dlm, unsigned i)
{
struct dlm_lock_resource *lockres;
u8 real_master;
+ u8 extra_ref;
};
struct dlm_assert_master_priv
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)
struct list_head dirty;
struct list_head recovering; // dlm_recovery_ctxt.resources list
+ /* Added during init and removed during release */
+ struct list_head tracking; /* dlm->tracking_list */
+
/* unused lock resources have their last_used stamped and are
* put on a list for the dlm thread to run. */
unsigned long last_used;
u8 owner; //node which owns the lock resource, or unknown
u16 state;
char lvb[DLM_LVB_LEN];
+ unsigned int inflight_locks;
+ unsigned long refmap[BITS_TO_LONGS(O2NM_MAX_NODES)];
};
struct dlm_migratable_lock
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 DLM_PROXY_AST_MAX_LEN (sizeof(struct dlm_proxy_ast)+DLM_LVB_LEN)
#define DLM_MOD_KEY (0x666c6172)
-enum dlm_query_join_response {
+enum dlm_query_join_response_code {
JOIN_DISALLOW = 0,
JOIN_OK,
JOIN_OK_NO_MAP,
+ JOIN_PROTOCOL_MISMATCH,
+};
+
+struct dlm_query_join_packet {
+ u8 code; /* Response code. dlm_minor and fs_minor
+ are only valid if this is JOIN_OK */
+ u8 dlm_minor; /* The minor version of the protocol the
+ dlm is speaking. */
+ u8 fs_minor; /* The minor version of the protocol the
+ filesystem is speaking. */
+ u8 reserved;
+};
+
+union dlm_query_join_response {
+ u32 intval;
+ struct dlm_query_join_packet packet;
};
struct dlm_lock_request
};
+#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;
+ struct dlm_protocol_version dlm_proto;
+ struct dlm_protocol_version fs_proto;
u8 domain[O2NM_MAX_NAME_LEN];
+ u8 node_map[BITS_TO_BYTES(O2NM_MAX_NODES)];
};
struct dlm_assert_joined
__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,
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);
static inline void dlm_lockres_get(struct dlm_lock_resource *res)
{
/* This is called on every lookup, so it might be worth
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,
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);
DLM_LOCK_RES_MIGRATING));
}
+/* create/destroy slab caches */
+int dlm_init_master_caches(void);
+void dlm_destroy_master_caches(void);
+
+int dlm_init_lock_cache(void);
+void dlm_destroy_lock_cache(void);
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)
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