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authorTheodore Ts'o <tytso@mit.edu>2018-09-03 22:25:01 -0400
committerTheodore Ts'o <tytso@mit.edu>2018-09-03 22:25:01 -0400
commit5f8c10936fab2b69a487400f2872902e597dd320 (patch)
tree239d1e7028b09e26dcbc03dd7f70a7c29d751a28
parentf0a459dec5495a3580f8d784555e6f8f3bf7f263 (diff)
downloadlinux-5f8c10936fab2b69a487400f2872902e597dd320.tar.bz2
ext4: fix online resizing for bigalloc file systems with a 1k block size
An online resize of a file system with the bigalloc feature enabled and a 1k block size would be refused since ext4_resize_begin() did not understand s_first_data_block is 0 for all bigalloc file systems, even when the block size is 1k. Signed-off-by: Theodore Ts'o <tytso@mit.edu> Cc: stable@vger.kernel.org
-rw-r--r--fs/ext4/resize.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 33655a6eff4d..ebbc663d0798 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -19,6 +19,7 @@
int ext4_resize_begin(struct super_block *sb)
{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
int ret = 0;
if (!capable(CAP_SYS_RESOURCE))
@@ -29,7 +30,7 @@ int ext4_resize_begin(struct super_block *sb)
* because the user tools have no way of handling this. Probably a
* bad time to do it anyways.
*/
- if (EXT4_SB(sb)->s_sbh->b_blocknr !=
+ if (EXT4_B2C(sbi, sbi->s_sbh->b_blocknr) !=
le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
ext4_warning(sb, "won't resize using backup superblock at %llu",
(unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);