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authorTrond Myklebust <trond.myklebust@primarydata.com>2014-10-17 15:10:25 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-11-21 09:22:54 -0800
commit361eeee70ea9c57a2ce018ea0ce720f44a3fc07d (patch)
tree834497f2f74e9b64574e3c2292d60ef94218f5f7 /fs
parentabf9765d3b73f3bf7ebea763b9b86aa38e29bd24 (diff)
downloadlinux-linaro-stable-361eeee70ea9c57a2ce018ea0ce720f44a3fc07d.tar.gz
NFSv4: Ensure that we remove NFSv4.0 delegations when state has expired
commit 4dfd4f7af0afd201706ad186352ca423b0f17d4b upstream. NFSv4.0 does not have TEST_STATEID/FREE_STATEID functionality, so unlike NFSv4.1, the recovery procedure when stateids have expired or have been revoked requires us to just forget the delegation. http://lkml.kernel.org/r/CAN-5tyHwG=Cn2Q9KsHWadewjpTTy_K26ee+UnSvHvG4192p-Xw@mail.gmail.com Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/nfs/nfs4proc.c24
1 files changed, 23 insertions, 1 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 69fc437be661..2407d21db0f0 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1845,6 +1845,28 @@ static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *sta
return ret;
}
+static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
+{
+ nfs_remove_bad_delegation(state->inode);
+ write_seqlock(&state->seqlock);
+ nfs4_stateid_copy(&state->stateid, &state->open_stateid);
+ write_sequnlock(&state->seqlock);
+ clear_bit(NFS_DELEGATED_STATE, &state->flags);
+}
+
+static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
+{
+ if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
+ nfs_finish_clear_delegation_stateid(state);
+}
+
+static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
+{
+ /* NFSv4.0 doesn't allow for delegation recovery on open expire */
+ nfs40_clear_delegation_stateid(state);
+ return nfs4_open_expired(sp, state);
+}
+
#if defined(CONFIG_NFS_V4_1)
static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
{
@@ -6974,7 +6996,7 @@ static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
.owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
.state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
- .recover_open = nfs4_open_expired,
+ .recover_open = nfs40_open_expired,
.recover_lock = nfs4_lock_expired,
.establish_clid = nfs4_init_clientid,
.get_clid_cred = nfs4_get_setclientid_cred,