From 8a64c4ef106d17805691e893642912041a622938 Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@primarydata.com>
Date: Thu, 22 Sep 2016 13:39:21 -0400
Subject: [PATCH] NFSv4.1: Even if the stateid is OK, we may need to recover
the open modes
TEST_STATEID only tells you that you have a valid open stateid. It doesn't
tell the client anything about whether or not it holds the required share
locks.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Tested-by: Oleg Drokin <green@linuxhacker.ru>
[Anna: Wrap nfs_open_stateid_recover_openmode in CONFIG_NFS_V4_1 checks]
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
fs/nfs/nfs4proc.c | 32 +++++++++++++++++++++++---------
1 file changed, 23 insertions(+), 9 deletions(-)
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 79109c84f18d1..27120baf1ff3f 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1387,6 +1387,19 @@ static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
nfs4_state_set_mode_locked(state, state->state | fmode);
}
+#ifdef CONFIG_NFS_V4_1
+static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
+{
+ if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
+ return true;
+ if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
+ return true;
+ if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
+ return true;
+ return false;
+}
+#endif /* CONFIG_NFS_V4_1 */
+
static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
{
struct nfs_client *clp = state->owner->so_server->nfs_client;
@@ -2589,16 +2602,13 @@ static int nfs41_check_open_stateid(struct nfs4_state *state)
int status;
if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
- if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
- return NFS_OK;
+ if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
+ if (nfs4_have_delegation(state->inode, state->state))
+ return NFS_OK;
+ return -NFS4ERR_OPENMODE;
+ }
return -NFS4ERR_BAD_STATEID;
}
- /* If a state reset has been done, test_stateid is unneeded */
- if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
- (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
- (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
- return -NFS4ERR_BAD_STATEID;
-
status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
trace_nfs4_test_open_stateid(state, NULL, status);
if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
@@ -2608,7 +2618,11 @@ static int nfs41_check_open_stateid(struct nfs4_state *state)
clear_bit(NFS_OPEN_STATE, &state->flags);
stateid->type = NFS4_INVALID_STATEID_TYPE;
}
- return status;
+ if (status != NFS_OK)
+ return status;
+ if (nfs_open_stateid_recover_openmode(state))
+ return -NFS4ERR_OPENMODE;
+ return NFS_OK;
}
static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
--
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