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Message-Id: <20100219163239.911121165@kvm.kroah.org>
Date: Fri, 19 Feb 2010 08:29:26 -0800
From: Greg KH <gregkh@...e.de>
To: linux-kernel@...r.kernel.org, stable@...nel.org
Cc: stable-review@...nel.org, torvalds@...ux-foundation.org,
akpm@...ux-foundation.org, alan@...rguk.ukuu.org.uk,
Trond Myklebust <Trond.Myklebust@...app.com>
Subject: [33/93] NFSv4: Dont allow posix locking against servers that dont support it
2.6.32-stable review patch. If anyone has any objections, please let us know.
------------------
From: Trond Myklebust <Trond.Myklebust@...app.com>
commit 8e469ebd6dc32cbaf620e134d79f740bf0ebab79 upstream.
Signed-off-by: Trond Myklebust <Trond.Myklebust@...app.com>
Reviewed-by: Chuck Lever <chuck.lever@...cle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...e.de>
---
fs/nfs/nfs4_fs.h | 1 +
fs/nfs/nfs4proc.c | 7 ++++++-
2 files changed, 7 insertions(+), 1 deletion(-)
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -141,6 +141,7 @@ enum {
NFS_O_RDWR_STATE, /* OPEN stateid has read/write state */
NFS_STATE_RECLAIM_REBOOT, /* OPEN stateid server rebooted */
NFS_STATE_RECLAIM_NOGRACE, /* OPEN stateid needs to recover state */
+ NFS_STATE_POSIX_LOCKS, /* Posix locks are supported */
};
struct nfs4_state {
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1573,6 +1573,8 @@ static int _nfs4_do_open(struct inode *d
status = PTR_ERR(state);
if (IS_ERR(state))
goto err_opendata_put;
+ if ((opendata->o_res.rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) != 0)
+ set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
nfs4_opendata_put(opendata);
nfs4_put_state_owner(sp);
*res = state;
@@ -4060,8 +4062,11 @@ static int _nfs4_proc_setlk(struct nfs4_
{
struct nfs_inode *nfsi = NFS_I(state->inode);
unsigned char fl_flags = request->fl_flags;
- int status;
+ int status = -ENOLCK;
+ if ((fl_flags & FL_POSIX) &&
+ !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
+ goto out;
/* Is this a delegated open? */
status = nfs4_set_lock_state(state, request);
if (status != 0)
--
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