Commit 48e6061b authored by Yu Jian's avatar Yu Jian Committed by Theodore Ts'o

ext4: use EXT4_BAD_INO for buddy cache to avoid colliding with valid inode #

Signed-off-by: default avatarYu Jian <yujian@whamcloud.com>
Signed-off-by: default avatarAndreas Dilger <adilger@whamcloud.com>
Signed-off-by: default avatar"Theodore Ts'o" <tytso@mit.edu>
parent 9d8b9ec4
...@@ -2342,7 +2342,11 @@ static int ext4_mb_init_backend(struct super_block *sb) ...@@ -2342,7 +2342,11 @@ static int ext4_mb_init_backend(struct super_block *sb)
ext4_msg(sb, KERN_ERR, "can't get new inode"); ext4_msg(sb, KERN_ERR, "can't get new inode");
goto err_freesgi; goto err_freesgi;
} }
sbi->s_buddy_cache->i_ino = get_next_ino(); /* To avoid potentially colliding with an valid on-disk inode number,
* use EXT4_BAD_INO for the buddy cache inode number. This inode is
* not in the inode hash, so it should never be found by iget(), but
* this will avoid confusion if it ever shows up during debugging. */
sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;
EXT4_I(sbi->s_buddy_cache)->i_disksize = 0; EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
for (i = 0; i < ngroups; i++) { for (i = 0; i < ngroups; i++) {
desc = ext4_get_group_desc(sb, i, NULL); desc = ext4_get_group_desc(sb, i, NULL);
......
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