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ext3: don't try to resize if there are no reserved gdt blocks left

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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@redhat.com>
Cc: <linux-ext4@vger.kernel.org>
Cc: Andreas Dilger <adilger@sun.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Josef Bacik 2008-10-18 20:27:55 -07:00 committed by Linus Torvalds
parent 885e353c74
commit 972fbf7798
1 changed files with 2 additions and 1 deletions
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3
fs/ext3/resize.c
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@ -790,7 +790,8 @@ int ext3_group_add(struct super_block *sb, struct ext3_new_group_data *input)
if (reserved_gdb || gdb_off == 0) { if (reserved_gdb || gdb_off == 0) {
if (!EXT3_HAS_COMPAT_FEATURE(sb, if (!EXT3_HAS_COMPAT_FEATURE(sb,
EXT3_FEATURE_COMPAT_RESIZE_INODE)){ EXT3_FEATURE_COMPAT_RESIZE_INODE)
|| !le16_to_cpu(es->s_reserved_gdt_blocks)) {
ext3_warning(sb, __func__, ext3_warning(sb, __func__,
"No reserved GDT blocks, can't resize"); "No reserved GDT blocks, can't resize");
return -EPERM; return -EPERM;