From: Josef Bacik Date: Fri, 6 Jun 2008 22:05:52 +0000 (-0400) Subject: ext4: fix online resize bug X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=944600930a37aa725ba6f93c3244e2d77a1e3581;p=linux-2.6 ext4: 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. This was verified using the same testcase as with the ext3 equivalent of this patch. Signed-off-by: Josef Bacik Signed-off-by: Mingming Cao Signed-off-by: "Theodore Ts'o" --- diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c index 9f086a6a47..9ecb92f685 100644 --- a/fs/ext4/resize.c +++ b/fs/ext4/resize.c @@ -563,7 +563,8 @@ static int reserve_backup_gdb(handle_t *handle, struct inode *inode, } blk = EXT4_SB(sb)->s_sbh->b_blocknr + 1 + EXT4_SB(sb)->s_gdb_count; - data = (__le32 *)dind->b_data + EXT4_SB(sb)->s_gdb_count; + data = (__le32 *)dind->b_data + (EXT4_SB(sb)->s_gdb_count % + EXT4_ADDR_PER_BLOCK(sb)); end = (__le32 *)dind->b_data + EXT4_ADDR_PER_BLOCK(sb); /* Get each reserved primary GDT block and verify it holds backups */