X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=fs%2Focfs2%2Fdlm%2Fdlmcommon.h;h=9bea5c6ef9bf8faac83718e67b26c5b436c8af2b;hb=b7084ab538ac2bd71ce494cf1cbbea9fe9db2c07;hp=88cc43df18f11205c7f11f7344fe4b4c14d19e8f;hpb=3e8e7c93d7eb091463839b5212789c4aae09459e;p=linux-2.6

diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index 88cc43df18..9bea5c6ef9 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -37,7 +37,17 @@
 #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,
@@ -61,7 +71,8 @@ static inline int dlm_is_recovery_lock(const char *lock_name, int name_len)
 	return 0;
 }
 
-#define DLM_RECO_STATE_ACTIVE  0x0001
+#define DLM_RECO_STATE_ACTIVE    0x0001
+#define DLM_RECO_STATE_FINALIZE  0x0002
 
 struct dlm_recovery_ctxt
 {
@@ -85,7 +96,7 @@ enum dlm_ctxt_state {
 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;
@@ -132,6 +143,11 @@ struct dlm_ctxt
 	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
@@ -216,20 +232,29 @@ struct dlm_lock_resource
 	/* 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;
@@ -238,7 +263,6 @@ struct dlm_lock_resource
 	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];
 };
 
@@ -300,6 +324,15 @@ enum dlm_lockres_list {
 	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)
 {
@@ -609,7 +642,8 @@ struct dlm_finalize_reco
 {
 	u8 node_idx;
 	u8 dead_node;
-	__be16 pad1;
+	u8 flags;
+	u8 pad1;
 	__be32 pad2;
 };
 
@@ -676,6 +710,7 @@ void dlm_wait_for_recovery(struct dlm_ctxt *dlm);
 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);
@@ -687,14 +722,20 @@ 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(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);
@@ -819,6 +860,7 @@ 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_unused(struct dlm_lock_resource *res);
 
 static inline const char * dlm_lock_mode_name(int mode)
 {