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authorJosef Bacik <jbacik@redhat.com>2008-06-07 00:05:52 +0200
committerTheodore Ts'o <tytso@mit.edu>2008-06-07 00:05:52 +0200
commit944600930a37aa725ba6f93c3244e2d77a1e3581 (patch)
tree2582e2b72196d82ae8fef3b88cb7cc834a2198d0
parentext4: Fix uninit block group initialization with FLEX_BG (diff)
downloadlinux-944600930a37aa725ba6f93c3244e2d77a1e3581.tar.xz
linux-944600930a37aa725ba6f93c3244e2d77a1e3581.zip
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 <jbacik@redhat.com> Signed-off-by: Mingming Cao <cmm@us.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
-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 9f086a6a472b..9ecb92f68543 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 */