X-Git-Url: http://drtracing.org/?a=blobdiff_plain;f=fs%2Focfs2%2Fjournal.c;h=9698338adc3915e66a3db0eda77268e33b51f607;hb=b1f3550fa1471b691ad6c2f35b5b22e93eaa5855;hp=f9d01e25298decaa3b24ab3e3c38ee88d3d6c55c;hpb=37e58df30063e229ee5157f9d1c1fa1d749917c2;p=deliverable%2Flinux.git

diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index f9d01e25298d..9698338adc39 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -44,7 +44,6 @@
 #include "localalloc.h"
 #include "slot_map.h"
 #include "super.h"
-#include "vote.h"
 #include "sysfile.h"
 
 #include "buffer_head_io.h"
@@ -65,6 +64,137 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 				 int slot);
 static int ocfs2_commit_thread(void *arg);
 
+
+/*
+ * The recovery_list is a simple linked list of node numbers to recover.
+ * It is protected by the recovery_lock.
+ */
+
+struct ocfs2_recovery_map {
+	unsigned int rm_used;
+	unsigned int *rm_entries;
+};
+
+int ocfs2_recovery_init(struct ocfs2_super *osb)
+{
+	struct ocfs2_recovery_map *rm;
+
+	mutex_init(&osb->recovery_lock);
+	osb->disable_recovery = 0;
+	osb->recovery_thread_task = NULL;
+	init_waitqueue_head(&osb->recovery_event);
+
+	rm = kzalloc(sizeof(struct ocfs2_recovery_map) +
+		     osb->max_slots * sizeof(unsigned int),
+		     GFP_KERNEL);
+	if (!rm) {
+		mlog_errno(-ENOMEM);
+		return -ENOMEM;
+	}
+
+	rm->rm_entries = (unsigned int *)((char *)rm +
+					  sizeof(struct ocfs2_recovery_map));
+	osb->recovery_map = rm;
+
+	return 0;
+}
+
+/* we can't grab the goofy sem lock from inside wait_event, so we use
+ * memory barriers to make sure that we'll see the null task before
+ * being woken up */
+static int ocfs2_recovery_thread_running(struct ocfs2_super *osb)
+{
+	mb();
+	return osb->recovery_thread_task != NULL;
+}
+
+void ocfs2_recovery_exit(struct ocfs2_super *osb)
+{
+	struct ocfs2_recovery_map *rm;
+
+	/* disable any new recovery threads and wait for any currently
+	 * running ones to exit. Do this before setting the vol_state. */
+	mutex_lock(&osb->recovery_lock);
+	osb->disable_recovery = 1;
+	mutex_unlock(&osb->recovery_lock);
+	wait_event(osb->recovery_event, !ocfs2_recovery_thread_running(osb));
+
+	/* At this point, we know that no more recovery threads can be
+	 * launched, so wait for any recovery completion work to
+	 * complete. */
+	flush_workqueue(ocfs2_wq);
+
+	/*
+	 * Now that recovery is shut down, and the osb is about to be
+	 * freed,  the osb_lock is not taken here.
+	 */
+	rm = osb->recovery_map;
+	/* XXX: Should we bug if there are dirty entries? */
+
+	kfree(rm);
+}
+
+static int __ocfs2_recovery_map_test(struct ocfs2_super *osb,
+				     unsigned int node_num)
+{
+	int i;
+	struct ocfs2_recovery_map *rm = osb->recovery_map;
+
+	assert_spin_locked(&osb->osb_lock);
+
+	for (i = 0; i < rm->rm_used; i++) {
+		if (rm->rm_entries[i] == node_num)
+			return 1;
+	}
+
+	return 0;
+}
+
+/* Behaves like test-and-set.  Returns the previous value */
+static int ocfs2_recovery_map_set(struct ocfs2_super *osb,
+				  unsigned int node_num)
+{
+	struct ocfs2_recovery_map *rm = osb->recovery_map;
+
+	spin_lock(&osb->osb_lock);
+	if (__ocfs2_recovery_map_test(osb, node_num)) {
+		spin_unlock(&osb->osb_lock);
+		return 1;
+	}
+
+	/* XXX: Can this be exploited? Not from o2dlm... */
+	BUG_ON(rm->rm_used >= osb->max_slots);
+
+	rm->rm_entries[rm->rm_used] = node_num;
+	rm->rm_used++;
+	spin_unlock(&osb->osb_lock);
+
+	return 0;
+}
+
+static void ocfs2_recovery_map_clear(struct ocfs2_super *osb,
+				     unsigned int node_num)
+{
+	int i;
+	struct ocfs2_recovery_map *rm = osb->recovery_map;
+
+	spin_lock(&osb->osb_lock);
+
+	for (i = 0; i < rm->rm_used; i++) {
+		if (rm->rm_entries[i] == node_num)
+			break;
+	}
+
+	if (i < rm->rm_used) {
+		/* XXX: be careful with the pointer math */
+		memmove(&(rm->rm_entries[i]), &(rm->rm_entries[i + 1]),
+			(rm->rm_used - i - 1) * sizeof(unsigned int));
+		rm->rm_used--;
+	}
+
+	spin_unlock(&osb->osb_lock);
+}
+
 static int ocfs2_commit_cache(struct ocfs2_super *osb)
 {
 	int status = 0;
@@ -103,7 +233,7 @@ static int ocfs2_commit_cache(struct ocfs2_super *osb)
 	mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n",
 	     journal->j_trans_id, flushed);
 
-	ocfs2_kick_vote_thread(osb);
+	ocfs2_wake_downconvert_thread(osb);
 	wake_up(&journal->j_checkpointed);
 finally:
 	mlog_exit(status);
@@ -174,6 +304,12 @@ int ocfs2_commit_trans(struct ocfs2_super *osb,
  * transaction. extend_trans will either extend the current handle by
  * nblocks, or commit it and start a new one with nblocks credits.
  *
+ * This might call journal_restart() which will commit dirty buffers
+ * and then restart the transaction. Before calling
+ * ocfs2_extend_trans(), any changed blocks should have been
+ * dirtied. After calling it, all blocks which need to be changed must
+ * go through another set of journal_access/journal_dirty calls.
+ *
  * WARNING: This will not release any semaphores or disk locks taken
  * during the transaction, so make sure they were taken *before*
  * start_trans or we'll have ordering deadlocks.
@@ -193,11 +329,15 @@ int ocfs2_extend_trans(handle_t *handle, int nblocks)
 
 	mlog(0, "Trying to extend transaction by %d blocks\n", nblocks);
 
+#ifdef OCFS2_DEBUG_FS
+	status = 1;
+#else
 	status = journal_extend(handle, nblocks);
 	if (status < 0) {
 		mlog_errno(status);
 		goto bail;
 	}
+#endif
 
 	if (status > 0) {
 		mlog(0, "journal_extend failed, trying journal_restart\n");
@@ -304,14 +444,18 @@ int ocfs2_journal_dirty_data(handle_t *handle,
 	return err;
 }
 
-#define OCFS2_DEFAULT_COMMIT_INTERVAL 	(HZ * 5)
+#define OCFS2_DEFAULT_COMMIT_INTERVAL 	(HZ * JBD_DEFAULT_MAX_COMMIT_AGE)
 
 void ocfs2_set_journal_params(struct ocfs2_super *osb)
 {
 	journal_t *journal = osb->journal->j_journal;
+	unsigned long commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
+
+	if (osb->osb_commit_interval)
+		commit_interval = osb->osb_commit_interval;
 
 	spin_lock(&journal->j_state_lock);
-	journal->j_commit_interval = OCFS2_DEFAULT_COMMIT_INTERVAL;
+	journal->j_commit_interval = commit_interval;
 	if (osb->s_mount_opt & OCFS2_MOUNT_BARRIER)
 		journal->j_flags |= JFS_BARRIER;
 	else
@@ -327,7 +471,7 @@ int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty)
 	struct ocfs2_dinode *di = NULL;
 	struct buffer_head *bh = NULL;
 	struct ocfs2_super *osb;
-	int meta_lock = 0;
+	int inode_lock = 0;
 
 	mlog_entry_void();
 
@@ -357,14 +501,14 @@ int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty)
 	/* Skip recovery waits here - journal inode metadata never
 	 * changes in a live cluster so it can be considered an
 	 * exception to the rule. */
-	status = ocfs2_meta_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
+	status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
 	if (status < 0) {
 		if (status != -ERESTARTSYS)
 			mlog(ML_ERROR, "Could not get lock on journal!\n");
 		goto done;
 	}
 
-	meta_lock = 1;
+	inode_lock = 1;
 	di = (struct ocfs2_dinode *)bh->b_data;
 
 	if (inode->i_size <  OCFS2_MIN_JOURNAL_SIZE) {
@@ -404,8 +548,8 @@ int ocfs2_journal_init(struct ocfs2_journal *journal, int *dirty)
 	status = 0;
 done:
 	if (status < 0) {
-		if (meta_lock)
-			ocfs2_meta_unlock(inode, 1);
+		if (inode_lock)
+			ocfs2_inode_unlock(inode, 1);
 		if (bh != NULL)
 			brelse(bh);
 		if (inode) {
@@ -534,7 +678,7 @@ void ocfs2_journal_shutdown(struct ocfs2_super *osb)
 	OCFS2_I(inode)->ip_open_count--;
 
 	/* unlock our journal */
-	ocfs2_meta_unlock(inode, 1);
+	ocfs2_inode_unlock(inode, 1);
 
 	brelse(journal->j_bh);
 	journal->j_bh = NULL;
@@ -573,8 +717,7 @@ int ocfs2_journal_load(struct ocfs2_journal *journal, int local)
 
 	mlog_entry_void();
 
-	if (!journal)
-		BUG();
+	BUG_ON(!journal);
 
 	osb = journal->j_osb;
 
@@ -637,6 +780,23 @@ bail:
 	return status;
 }
 
+static int ocfs2_recovery_completed(struct ocfs2_super *osb)
+{
+	int empty;
+	struct ocfs2_recovery_map *rm = osb->recovery_map;
+
+	spin_lock(&osb->osb_lock);
+	empty = (rm->rm_used == 0);
+	spin_unlock(&osb->osb_lock);
+
+	return empty;
+}
+
+void ocfs2_wait_for_recovery(struct ocfs2_super *osb)
+{
+	wait_event(osb->recovery_event, ocfs2_recovery_completed(osb));
+}
+
 /*
  * JBD Might read a cached version of another nodes journal file. We
  * don't want this as this file changes often and we get no
@@ -835,6 +995,7 @@ static int __ocfs2_recovery_thread(void *arg)
 {
 	int status, node_num;
 	struct ocfs2_super *osb = arg;
+	struct ocfs2_recovery_map *rm = osb->recovery_map;
 
 	mlog_entry_void();
 
@@ -850,38 +1011,40 @@ restart:
 		goto bail;
 	}
 
-	while(!ocfs2_node_map_is_empty(osb, &osb->recovery_map)) {
-		node_num = ocfs2_node_map_first_set_bit(osb,
-							&osb->recovery_map);
-		if (node_num == O2NM_INVALID_NODE_NUM) {
-			mlog(0, "Out of nodes to recover.\n");
-			break;
-		}
+	spin_lock(&osb->osb_lock);
+	while (rm->rm_used) {
+		/* It's always safe to remove entry zero, as we won't
+		 * clear it until ocfs2_recover_node() has succeeded. */
+		node_num = rm->rm_entries[0];
+		spin_unlock(&osb->osb_lock);
 
 		status = ocfs2_recover_node(osb, node_num);
-		if (status < 0) {
+		if (!status) {
+			ocfs2_recovery_map_clear(osb, node_num);
+		} else {
 			mlog(ML_ERROR,
 			     "Error %d recovering node %d on device (%u,%u)!\n",
 			     status, node_num,
 			     MAJOR(osb->sb->s_dev), MINOR(osb->sb->s_dev));
 			mlog(ML_ERROR, "Volume requires unmount.\n");
-			continue;
 		}
 
-		ocfs2_recovery_map_clear(osb, node_num);
+		spin_lock(&osb->osb_lock);
 	}
+	spin_unlock(&osb->osb_lock);
+	mlog(0, "All nodes recovered\n");
+
 	ocfs2_super_unlock(osb, 1);
 
 	/* We always run recovery on our own orphan dir - the dead
-	 * node(s) may have voted "no" on an inode delete earlier. A
-	 * revote is therefore required. */
+	 * node(s) may have disallowd a previos inode delete. Re-processing
+	 * is therefore required. */
 	ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL,
 					NULL);
 
 bail:
 	mutex_lock(&osb->recovery_lock);
-	if (!status &&
-	    !ocfs2_node_map_is_empty(osb, &osb->recovery_map)) {
+	if (!status && !ocfs2_recovery_completed(osb)) {
 		mutex_unlock(&osb->recovery_lock);
 		goto restart;
 	}
@@ -911,8 +1074,8 @@ void ocfs2_recovery_thread(struct ocfs2_super *osb, int node_num)
 
 	/* People waiting on recovery will wait on
 	 * the recovery map to empty. */
-	if (!ocfs2_recovery_map_set(osb, node_num))
-		mlog(0, "node %d already be in recovery.\n", node_num);
+	if (ocfs2_recovery_map_set(osb, node_num))
+		mlog(0, "node %d already in recovery map.\n", node_num);
 
 	mlog(0, "starting recovery thread...\n");
 
@@ -963,9 +1126,9 @@ static int ocfs2_replay_journal(struct ocfs2_super *osb,
 	}
 	SET_INODE_JOURNAL(inode);
 
-	status = ocfs2_meta_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
+	status = ocfs2_inode_lock_full(inode, &bh, 1, OCFS2_META_LOCK_RECOVERY);
 	if (status < 0) {
-		mlog(0, "status returned from ocfs2_meta_lock=%d\n", status);
+		mlog(0, "status returned from ocfs2_inode_lock=%d\n", status);
 		if (status != -ERESTARTSYS)
 			mlog(ML_ERROR, "Could not lock journal!\n");
 		goto done;
@@ -1037,7 +1200,7 @@ static int ocfs2_replay_journal(struct ocfs2_super *osb,
 done:
 	/* drop the lock on this nodes journal */
 	if (got_lock)
-		ocfs2_meta_unlock(inode, 1);
+		ocfs2_inode_unlock(inode, 1);
 
 	if (inode)
 		iput(inode);
@@ -1066,7 +1229,6 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,
 {
 	int status = 0;
 	int slot_num;
-	struct ocfs2_slot_info *si = osb->slot_info;
 	struct ocfs2_dinode *la_copy = NULL;
 	struct ocfs2_dinode *tl_copy = NULL;
 
@@ -1079,8 +1241,8 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,
 	 * case we should've called ocfs2_journal_load instead. */
 	BUG_ON(osb->node_num == node_num);
 
-	slot_num = ocfs2_node_num_to_slot(si, node_num);
-	if (slot_num == OCFS2_INVALID_SLOT) {
+	slot_num = ocfs2_node_num_to_slot(osb, node_num);
+	if (slot_num == -ENOENT) {
 		status = 0;
 		mlog(0, "no slot for this node, so no recovery required.\n");
 		goto done;
@@ -1110,8 +1272,7 @@ static int ocfs2_recover_node(struct ocfs2_super *osb,
 
 	/* Likewise, this would be a strange but ultimately not so
 	 * harmful place to get an error... */
-	ocfs2_clear_slot(si, slot_num);
-	status = ocfs2_update_disk_slots(osb, si);
+	status = ocfs2_clear_slot(osb, slot_num);
 	if (status < 0)
 		mlog_errno(status);
 
@@ -1152,14 +1313,14 @@ static int ocfs2_trylock_journal(struct ocfs2_super *osb,
 	SET_INODE_JOURNAL(inode);
 
 	flags = OCFS2_META_LOCK_RECOVERY | OCFS2_META_LOCK_NOQUEUE;
-	status = ocfs2_meta_lock_full(inode, NULL, 1, flags);
+	status = ocfs2_inode_lock_full(inode, NULL, 1, flags);
 	if (status < 0) {
 		if (status != -EAGAIN)
 			mlog_errno(status);
 		goto bail;
 	}
 
-	ocfs2_meta_unlock(inode, 1);
+	ocfs2_inode_unlock(inode, 1);
 bail:
 	if (inode)
 		iput(inode);
@@ -1171,23 +1332,24 @@ bail:
  * slot info struct has been updated from disk. */
 int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
 {
-	int status, i, node_num;
-	struct ocfs2_slot_info *si = osb->slot_info;
+	unsigned int node_num;
+	int status, i;
 
 	/* This is called with the super block cluster lock, so we
 	 * know that the slot map can't change underneath us. */
 
-	spin_lock(&si->si_lock);
-	for(i = 0; i < si->si_num_slots; i++) {
+	spin_lock(&osb->osb_lock);
+	for (i = 0; i < osb->max_slots; i++) {
 		if (i == osb->slot_num)
 			continue;
-		if (ocfs2_is_empty_slot(si, i))
+
+		status = ocfs2_slot_to_node_num_locked(osb, i, &node_num);
+		if (status == -ENOENT)
 			continue;
 
-		node_num = si->si_global_node_nums[i];
-		if (ocfs2_node_map_test_bit(osb, &osb->recovery_map, node_num))
+		if (__ocfs2_recovery_map_test(osb, node_num))
 			continue;
-		spin_unlock(&si->si_lock);
+		spin_unlock(&osb->osb_lock);
 
 		/* Ok, we have a slot occupied by another node which
 		 * is not in the recovery map. We trylock his journal
@@ -1203,9 +1365,9 @@ int ocfs2_mark_dead_nodes(struct ocfs2_super *osb)
 			goto bail;
 		}
 
-		spin_lock(&si->si_lock);
+		spin_lock(&osb->osb_lock);
 	}
-	spin_unlock(&si->si_lock);
+	spin_unlock(&osb->osb_lock);
 
 	status = 0;
 bail:
@@ -1231,7 +1393,7 @@ static int ocfs2_orphan_filldir(void *priv, const char *name, int name_len,
 
 	/* Skip bad inodes so that recovery can continue */
 	iter = ocfs2_iget(p->osb, ino,
-			  OCFS2_FI_FLAG_ORPHAN_RECOVERY);
+			  OCFS2_FI_FLAG_ORPHAN_RECOVERY, 0);
 	if (IS_ERR(iter))
 		return 0;
 
@@ -1267,7 +1429,7 @@ static int ocfs2_queue_orphans(struct ocfs2_super *osb,
 	}	
 
 	mutex_lock(&orphan_dir_inode->i_mutex);
-	status = ocfs2_meta_lock(orphan_dir_inode, NULL, 0);
+	status = ocfs2_inode_lock(orphan_dir_inode, NULL, 0);
 	if (status < 0) {
 		mlog_errno(status);
 		goto out;
@@ -1277,12 +1439,13 @@ static int ocfs2_queue_orphans(struct ocfs2_super *osb,
 				   ocfs2_orphan_filldir);
 	if (status) {
 		mlog_errno(status);
-		goto out;
+		goto out_cluster;
 	}
 
 	*head = priv.head;
 
-	ocfs2_meta_unlock(orphan_dir_inode, 0);
+out_cluster:
+	ocfs2_inode_unlock(orphan_dir_inode, 0);
 out:
 	mutex_unlock(&orphan_dir_inode->i_mutex);
 	iput(orphan_dir_inode);
@@ -1369,10 +1532,10 @@ static int ocfs2_recover_orphans(struct ocfs2_super *osb,
 		iter = oi->ip_next_orphan;
 
 		spin_lock(&oi->ip_lock);
-		/* Delete voting may have set these on the assumption
-		 * that the other node would wipe them successfully.
-		 * If they are still in the node's orphan dir, we need
-		 * to reset that state. */
+		/* The remote delete code may have set these on the
+		 * assumption that the other node would wipe them
+		 * successfully.  If they are still in the node's
+		 * orphan dir, we need to reset that state. */
 		oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE);
 
 		/* Set the proper information to get us going into