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| author | David Gibson <david@gibson.dropbear.id.au> | 2005-11-21 21:32:24 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-22 09:13:43 -0800 |
| commit | 74a8a65c526187fe636a6a2abcb7d9ebc5c753ab (patch) | |
| tree | 97900dc68c67eb0d9e2010e34a0c00e27c1ffc1d /fs/hugetlbfs | |
| parent | 86e07ce71a8aad5074f7316f9b297d2137630283 (diff) | |
| download | talos-op-linux-74a8a65c526187fe636a6a2abcb7d9ebc5c753ab.tar.gz talos-op-linux-74a8a65c526187fe636a6a2abcb7d9ebc5c753ab.zip | |
[PATCH] Fix hugetlbfs_statfs() reporting of block limits
Currently, if a hugetlbfs is mounted without limits (the default), statfs()
will return -1 for max/free/used blocks. This does not appear to be in
line with normal convention: simple_statfs() and shmem_statfs() both return
0 in similar cases. Worse, it confuses the translation logic in
put_compat_statfs(), causing it to return -EOVERFLOW on such a mount.
This patch alters hugetlbfs_statfs() to return 0 for max/free/used blocks
on a mount without limits. Note that we need the test in the patch below,
rather than just using 0 in the sbinfo structure, because the -1 marked in
the free blocks field is used internally to tell the
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/hugetlbfs')
| -rw-r--r-- | fs/hugetlbfs/inode.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c index 64983ab55586..8c1cef3bb677 100644 --- a/fs/hugetlbfs/inode.c +++ b/fs/hugetlbfs/inode.c @@ -512,10 +512,14 @@ static int hugetlbfs_statfs(struct super_block *sb, struct kstatfs *buf) buf->f_bsize = HPAGE_SIZE; if (sbinfo) { spin_lock(&sbinfo->stat_lock); - buf->f_blocks = sbinfo->max_blocks; - buf->f_bavail = buf->f_bfree = sbinfo->free_blocks; - buf->f_files = sbinfo->max_inodes; - buf->f_ffree = sbinfo->free_inodes; + /* If no limits set, just report 0 for max/free/used + * blocks, like simple_statfs() */ + if (sbinfo->max_blocks >= 0) { + buf->f_blocks = sbinfo->max_blocks; + buf->f_bavail = buf->f_bfree = sbinfo->free_blocks; + buf->f_files = sbinfo->max_inodes; + buf->f_ffree = sbinfo->free_inodes; + } spin_unlock(&sbinfo->stat_lock); } buf->f_namelen = NAME_MAX; |
