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authorNeilBrown <neilb@suse.de>2015-06-25 15:03:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-06-25 17:00:43 -0700
commitf73c2f1f83ca1c4e2f4515f987973bfe56c86973 (patch)
tree9ae082c6781b717bdb4e28647938c9aa9ff0de9e /fs/nilfs2
parent9f0f564abbd8812edeef2c839ab3e6ba16595491 (diff)
NILFS2: support NFSv2 export
The "fh_len" passed to ->fh_to_* is not guaranteed to be that same as that returned by encode_fh - it may be larger. With NFSv2, the filehandle is fixed length, so it may appear longer than expected and be zero-padded. So we must test that fh_len is at least some value, not exactly equal to it. Signed-off-by: NeilBrown <neilb@suse.de> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/nilfs2')
-rw-r--r--fs/nilfs2/namei.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 22180836ec22..37dd6b05b1b5 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -496,8 +496,7 @@ static struct dentry *nilfs_fh_to_dentry(struct super_block *sb, struct fid *fh,
{
struct nilfs_fid *fid = (struct nilfs_fid *)fh;
- if ((fh_len != NILFS_FID_SIZE_NON_CONNECTABLE &&
- fh_len != NILFS_FID_SIZE_CONNECTABLE) ||
+ if (fh_len < NILFS_FID_SIZE_NON_CONNECTABLE ||
(fh_type != FILEID_NILFS_WITH_PARENT &&
fh_type != FILEID_NILFS_WITHOUT_PARENT))
return NULL;
@@ -510,7 +509,7 @@ static struct dentry *nilfs_fh_to_parent(struct super_block *sb, struct fid *fh,
{
struct nilfs_fid *fid = (struct nilfs_fid *)fh;
- if (fh_len != NILFS_FID_SIZE_CONNECTABLE ||
+ if (fh_len < NILFS_FID_SIZE_CONNECTABLE ||
fh_type != FILEID_NILFS_WITH_PARENT)
return NULL;