[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-ID: <20150508001623.31129.25102.stgit@notabene.brown>
Date: Fri, 08 May 2015 10:16:23 +1000
From: NeilBrown <neilb@...e.de>
To: Josef Bacik <jbacik@...com>, Chris Mason <clm@...com>,
Jan Kara <jack@...e.cz>, David Sterba <dsterba@...e.cz>,
Ryusuke Konishi <konishi.ryusuke@....ntt.co.jp>
Cc: linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-nilfs@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-btrfs@...r.kernel.org
Subject: [PATCH 2/3] 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@...e.de>
---
fs/nilfs2/namei.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/fs/nilfs2/namei.c b/fs/nilfs2/namei.c
index 22180836ec22..b65fb79d16fd 100644
--- a/fs/nilfs2/namei.c
+++ b/fs/nilfs2/namei.c
@@ -496,8 +496,8 @@ 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_len < NILFS_FID_SIZE_CONNECTABLE) ||
(fh_type != FILEID_NILFS_WITH_PARENT &&
fh_type != FILEID_NILFS_WITHOUT_PARENT))
return NULL;
@@ -510,7 +510,7 @@ 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;
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists