Merge tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kern…

…el/git/tytso/ext4

Pull ext4 bugfixes from Ted Ts'o.

Misc ext4 fixes, delayed by Ted moving mail servers and email getting
marked as spam due to bad spf records.

* tag 'ext4_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: add WARN_ON to check the length of allocated blocks
  ext4: fix retry handling in ext4_ext_truncate()
  ext4: destroy ext4_es_cachep on module unload
  ext4: make sure group number is bumped after a inode allocation race

fs/ext4/extents.c

@@ -4412,7 +4412,7 @@ void ext4_ext_truncate(handle_t *handle, struct inode *inode)
 retry:
 	err = ext4_es_remove_extent(inode, last_block,
 				    EXT_MAX_BLOCKS - last_block);
-	if (err == ENOMEM) {
+	if (err == -ENOMEM) {
 		cond_resched();
 		congestion_wait(BLK_RW_ASYNC, HZ/50);
 		goto retry;

fs/ext4/ialloc.c

@@ -734,11 +734,8 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
 		ino = ext4_find_next_zero_bit((unsigned long *)
 					      inode_bitmap_bh->b_data,
 					      EXT4_INODES_PER_GROUP(sb), ino);
-		if (ino >= EXT4_INODES_PER_GROUP(sb)) {
-			if (++group == ngroups)
-				group = 0;
-			continue;
-		}
+		if (ino >= EXT4_INODES_PER_GROUP(sb))
+			goto next_group;
 		if (group == 0 && (ino+1) < EXT4_FIRST_INO(sb)) {
 			ext4_error(sb, "reserved inode found cleared - "
 				   "inode=%lu", ino + 1);
@@ -769,6 +766,9 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
 			goto got; /* we grabbed the inode! */
 		if (ino < EXT4_INODES_PER_GROUP(sb))
 			goto repeat_in_this_group;
+next_group:
+		if (++group == ngroups)
+			group = 0;
 	}
 	err = -ENOSPC;
 	goto out;

fs/ext4/inode.c

@@ -555,14 +555,13 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 		int ret;
 		unsigned long long status;
 
-#ifdef ES_AGGRESSIVE_TEST
-		if (retval != map->m_len) {
-			printk("ES len assertion failed for inode: %lu "
-			       "retval %d != map->m_len %d "
-			       "in %s (lookup)\n", inode->i_ino, retval,
-			       map->m_len, __func__);
+		if (unlikely(retval != map->m_len)) {
+			ext4_warning(inode->i_sb,
+				     "ES len assertion failed for inode "
+				     "%lu: retval %d != map->m_len %d",
+				     inode->i_ino, retval, map->m_len);
+			WARN_ON(1);
 		}
-#endif
 
 		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
 				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;
@@ -656,14 +655,13 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 		int ret;
 		unsigned long long status;
 
-#ifdef ES_AGGRESSIVE_TEST
-		if (retval != map->m_len) {
-			printk("ES len assertion failed for inode: %lu "
-			       "retval %d != map->m_len %d "
-			       "in %s (allocation)\n", inode->i_ino, retval,
-			       map->m_len, __func__);
+		if (unlikely(retval != map->m_len)) {
+			ext4_warning(inode->i_sb,
+				     "ES len assertion failed for inode "
+				     "%lu: retval %d != map->m_len %d",
+				     inode->i_ino, retval, map->m_len);
+			WARN_ON(1);
 		}
-#endif
 
 		/*
 		 * If the extent has been zeroed out, we don't need to update
@@ -1637,14 +1635,13 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
 		int ret;
 		unsigned long long status;
 
-#ifdef ES_AGGRESSIVE_TEST
-		if (retval != map->m_len) {
-			printk("ES len assertion failed for inode: %lu "
-			       "retval %d != map->m_len %d "
-			       "in %s (lookup)\n", inode->i_ino, retval,
-			       map->m_len, __func__);
+		if (unlikely(retval != map->m_len)) {
+			ext4_warning(inode->i_sb,
+				     "ES len assertion failed for inode "
+				     "%lu: retval %d != map->m_len %d",
+				     inode->i_ino, retval, map->m_len);
+			WARN_ON(1);
 		}
-#endif
 
 		status = map->m_flags & EXT4_MAP_UNWRITTEN ?
 				EXTENT_STATUS_UNWRITTEN : EXTENT_STATUS_WRITTEN;

fs/ext4/super.c

@@ -5481,6 +5481,7 @@ static void __exit ext4_exit_fs(void)
 	kset_unregister(ext4_kset);
 	ext4_exit_system_zone();
 	ext4_exit_pageio();
+	ext4_exit_es();
 }
 
 MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others");