The patch titled
ext4: don't try to resize if there are no reserved gdt blocks left
has been added to the -mm tree. Its filename is
ext4-dont-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: ext4: don't try to resize if there are no reserved gdt blocks left
From: Josef Bacik <jbacik@xxxxxxxxxx>
When trying to resize a ext3 fs and you run out of reserved gdt blocks,
you get an error that doesn't actually tell you what went wrong, it just
says that the gdb it picked is not correct, which is the case since you
don't have any reserved gdt blocks left. This patch adds a check to make
sure you have reserved gdt blocks to use, and if not prints out a more
relevant error.
Signed-off-by: Josef Bacik <jbacik@xxxxxxxxxx>
Cc: <linux-ext4@xxxxxxxxxxxxxxx>
Cc: Andreas Dilger <adilger@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/ext4/resize.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff -puN fs/ext4/resize.c~ext4-dont-try-to-resize-if-there-are-no-reserved-gdt-blocks-left fs/ext4/resize.c
--- a/fs/ext4/resize.c~ext4-dont-try-to-resize-if-there-are-no-reserved-gdt-blocks-left
+++ a/fs/ext4/resize.c
@@ -773,7 +773,8 @@ int ext4_group_add(struct super_block *s
if (reserved_gdb || gdb_off == 0) {
if (!EXT4_HAS_COMPAT_FEATURE(sb,
- EXT4_FEATURE_COMPAT_RESIZE_INODE)){
+ EXT4_FEATURE_COMPAT_RESIZE_INODE)
+ || !le16_to_cpu(es->s_reserved_gdt_blocks)) {
ext4_warning(sb, __func__,
"No reserved GDT blocks, can't resize");
return -EPERM;
_
Patches currently in -mm which might be from jbacik@xxxxxxxxxx are
ext3-dont-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch
ext4-dont-try-to-resize-if-there-are-no-reserved-gdt-blocks-left.patch
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