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authorJosef Bacik <jbacik@redhat.com>2008-06-06 01:46:47 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-06-06 14:29:13 -0400
commit9bb91784de6618c955994b2d5be332fb68c87ef1 (patch)
treed066724a0f33afad2716743f33d89e7df8c1c81d /fs
parentd100d148aa48df3b6ad526a48624f906695efe60 (diff)
ext3: fix online resize bug
There is a bug when we are trying to verify that the reserve inode's double indirect blocks point back to the primary gdt blocks. The fix is obvious, we need to mod the gdb count by the addr's per block. You can verify this with the following test case dd if=/dev/zero of=disk1 seek=1024 count=1 bs=100M losetup /dev/loop1 disk1 pvcreate /dev/loop1 vgcreate loopvg1 /dev/loop1 lvcreate -l 100%VG loopvg1 -n looplv1 mkfs.ext3 -J size=64 -b 1024 /dev/loopvg1/looplv1 mount /dev/loopvg1/looplv1 /mnt/loop dd if=/dev/zero of=disk2 seek=1024 count=1 bs=50M losetup /dev/loop2 disk2 pvcreate /dev/loop2 vgextend loopvg1 /dev/loop2 lvextend -l 100%VG /dev/loopvg1/looplv1 resize2fs /dev/loopvg1/looplv1 without this patch the resize2fs fails, with it the resize2fs succeeds. Signed-off-by: Josef Bacik <jbacik@redhat.com> Acked-by: Andreas Dilger <adilger@sun.com> Cc: <linux-ext4@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/ext3/resize.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/fs/ext3/resize.c b/fs/ext3/resize.c
index 28cfd0b40527..77278e947e94 100644
--- a/fs/ext3/resize.c
+++ b/fs/ext3/resize.c
@@ -580,7 +580,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode,
580 } 580 }
581 581
582 blk = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + EXT3_SB(sb)->s_gdb_count; 582 blk = EXT3_SB(sb)->s_sbh->b_blocknr + 1 + EXT3_SB(sb)->s_gdb_count;
583 data = (__le32 *)dind->b_data + EXT3_SB(sb)->s_gdb_count; 583 data = (__le32 *)dind->b_data + (EXT3_SB(sb)->s_gdb_count %
584 EXT3_ADDR_PER_BLOCK(sb));
584 end = (__le32 *)dind->b_data + EXT3_ADDR_PER_BLOCK(sb); 585 end = (__le32 *)dind->b_data + EXT3_ADDR_PER_BLOCK(sb);
585 586
586 /* Get each reserved primary GDT block and verify it holds backups */ 587 /* Get each reserved primary GDT block and verify it holds backups */