NFSv4: Clear the open state flags if the new stateid does not match
RFC3530 and RFC5661 both prescribe that the 'opaque' field of the
open stateid returned by new OPEN/OPEN_DOWNGRADE/CLOSE calls for
the same file and open owner should match.
If this is not the case, assume that the open state has been lost,
and that we need to recover it.
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 1f593a0..2427ef4 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -1137,13 +1137,30 @@
nfs4_state_set_mode_locked(state, state->state | fmode);
}
+static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
+{
+ struct nfs_client *clp = state->owner->so_server->nfs_client;
+ bool need_recover = false;
+
+ if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
+ need_recover = true;
+ if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
+ need_recover = true;
+ if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
+ need_recover = true;
+ if (need_recover)
+ nfs4_state_mark_reclaim_nograce(clp, state);
+}
+
static bool nfs_need_update_open_stateid(struct nfs4_state *state,
nfs4_stateid *stateid)
{
if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
return true;
- if (!nfs4_stateid_match_other(stateid, &state->open_stateid))
+ if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
+ nfs_test_and_clear_all_open_stateid(state);
return true;
+ }
if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
return true;
return false;
@@ -1179,6 +1196,8 @@
write_seqlock(&state->seqlock);
nfs_clear_open_stateid_locked(state, stateid, fmode);
write_sequnlock(&state->seqlock);
+ if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
+ nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
}
static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
@@ -1255,6 +1274,8 @@
__update_open_stateid(state, open_stateid, NULL, fmode);
ret = 1;
}
+ if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
+ nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
return ret;
}
@@ -1488,12 +1509,15 @@
struct nfs4_state *newstate;
int ret;
+ /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
+ clear_bit(NFS_O_RDWR_STATE, &state->flags);
+ clear_bit(NFS_O_WRONLY_STATE, &state->flags);
+ clear_bit(NFS_O_RDONLY_STATE, &state->flags);
/* memory barrier prior to reading state->n_* */
clear_bit(NFS_DELEGATED_STATE, &state->flags);
clear_bit(NFS_OPEN_STATE, &state->flags);
smp_rmb();
if (state->n_rdwr != 0) {
- clear_bit(NFS_O_RDWR_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
@@ -1501,7 +1525,6 @@
return -ESTALE;
}
if (state->n_wronly != 0) {
- clear_bit(NFS_O_WRONLY_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
if (ret != 0)
return ret;
@@ -1509,7 +1532,6 @@
return -ESTALE;
}
if (state->n_rdonly != 0) {
- clear_bit(NFS_O_RDONLY_STATE, &state->flags);
ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
if (ret != 0)
return ret;