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Diffstat (limited to 'fs/nfsd/nfs4callback.c')
-rw-r--r--fs/nfsd/nfs4callback.c70
1 files changed, 44 insertions, 26 deletions
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index 30aa24103..e88aca0c6 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -45,7 +45,7 @@
#define NFSDDBG_FACILITY NFSDDBG_PROC
-static void nfsd4_mark_cb_fault(struct nfs4_client *, int reason);
+static void nfsd4_mark_cb_fault(struct nfs4_client *clp);
#define NFSPROC4_CB_NULL 0
#define NFSPROC4_CB_COMPOUND 1
@@ -768,7 +768,7 @@ static void nfs4_xdr_enc_cb_notify_lock(struct rpc_rqst *req,
const struct nfsd4_callback *cb = data;
const struct nfsd4_blocked_lock *nbl =
container_of(cb, struct nfsd4_blocked_lock, nbl_cb);
- struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.fl_owner;
+ struct nfs4_lockowner *lo = (struct nfs4_lockowner *)nbl->nbl_lock.c.flc_owner;
struct nfs4_cb_compound_hdr hdr = {
.ident = 0,
.minorversion = cb->cb_clp->cl_minorversion,
@@ -982,6 +982,7 @@ static struct workqueue_struct *callback_wq;
static bool nfsd4_queue_cb(struct nfsd4_callback *cb)
{
+ trace_nfsd_cb_queue(cb->cb_clp, cb);
return queue_work(callback_wq, &cb->cb_work);
}
@@ -1094,18 +1095,18 @@ static void nfsd4_mark_cb_state(struct nfs4_client *clp, int newstate)
{
if (clp->cl_cb_state != newstate) {
clp->cl_cb_state = newstate;
- trace_nfsd_cb_state(clp);
+ trace_nfsd_cb_new_state(clp);
}
}
-static void nfsd4_mark_cb_down(struct nfs4_client *clp, int reason)
+static void nfsd4_mark_cb_down(struct nfs4_client *clp)
{
if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))
return;
nfsd4_mark_cb_state(clp, NFSD4_CB_DOWN);
}
-static void nfsd4_mark_cb_fault(struct nfs4_client *clp, int reason)
+static void nfsd4_mark_cb_fault(struct nfs4_client *clp)
{
if (test_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags))
return;
@@ -1117,7 +1118,7 @@ static void nfsd4_cb_probe_done(struct rpc_task *task, void *calldata)
struct nfs4_client *clp = container_of(calldata, struct nfs4_client, cl_cb_null);
if (task->tk_status)
- nfsd4_mark_cb_down(clp, task->tk_status);
+ nfsd4_mark_cb_down(clp);
else
nfsd4_mark_cb_state(clp, NFSD4_CB_UP);
}
@@ -1201,6 +1202,7 @@ static void nfsd41_destroy_cb(struct nfsd4_callback *cb)
{
struct nfs4_client *clp = cb->cb_clp;
+ trace_nfsd_cb_destroy(clp, cb);
nfsd41_cb_release_slot(cb);
if (cb->cb_ops && cb->cb_ops->release)
cb->cb_ops->release(cb);
@@ -1253,6 +1255,8 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
if (!cb->cb_holds_slot)
goto need_restart;
+ /* This is the operation status code for CB_SEQUENCE */
+ trace_nfsd_cb_seq_status(task, cb);
switch (cb->cb_seq_status) {
case 0:
/*
@@ -1266,13 +1270,23 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
break;
case -ESERVERFAULT:
++session->se_cb_seq_nr;
- fallthrough;
+ nfsd4_mark_cb_fault(cb->cb_clp);
+ ret = false;
+ break;
case 1:
+ /*
+ * cb_seq_status remains 1 if an RPC Reply was never
+ * received. NFSD can't know if the client processed
+ * the CB_SEQUENCE operation. Ask the client to send a
+ * DESTROY_SESSION to recover.
+ */
+ fallthrough;
case -NFS4ERR_BADSESSION:
- nfsd4_mark_cb_fault(cb->cb_clp, cb->cb_seq_status);
+ nfsd4_mark_cb_fault(cb->cb_clp);
ret = false;
- break;
+ goto need_restart;
case -NFS4ERR_DELAY:
+ cb->cb_seq_status = 1;
if (!rpc_restart_call(task))
goto out;
@@ -1287,14 +1301,11 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
}
break;
default:
- nfsd4_mark_cb_fault(cb->cb_clp, cb->cb_seq_status);
- dprintk("%s: unprocessed error %d\n", __func__,
- cb->cb_seq_status);
+ nfsd4_mark_cb_fault(cb->cb_clp);
}
-
nfsd41_cb_release_slot(cb);
- dprintk("%s: freed slot, new seqid=%d\n", __func__,
- clp->cl_cb_session->se_cb_seq_nr);
+
+ trace_nfsd_cb_free_slot(task, cb);
if (RPC_SIGNALLED(task))
goto need_restart;
@@ -1306,6 +1317,7 @@ retry_nowait:
goto out;
need_restart:
if (!test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags)) {
+ trace_nfsd_cb_restart(clp, cb);
task->tk_status = 0;
cb->cb_need_restart = true;
}
@@ -1335,7 +1347,7 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
case -EIO:
case -ETIMEDOUT:
case -EACCES:
- nfsd4_mark_cb_down(clp, task->tk_status);
+ nfsd4_mark_cb_down(clp);
}
break;
default:
@@ -1390,12 +1402,13 @@ void nfsd4_shutdown_callback(struct nfs4_client *clp)
nfsd41_cb_inflight_wait_complete(clp);
}
-/* requires cl_lock: */
static struct nfsd4_conn * __nfsd4_find_backchannel(struct nfs4_client *clp)
{
struct nfsd4_session *s;
struct nfsd4_conn *c;
+ lockdep_assert_held(&clp->cl_lock);
+
list_for_each_entry(s, &clp->cl_sessions, se_perclnt) {
list_for_each_entry(c, &s->se_conns, cn_persession) {
if (c->cn_flags & NFS4_CDFC4_BACK)
@@ -1419,11 +1432,14 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
struct nfsd4_conn *c;
int err;
+ trace_nfsd_cb_bc_update(clp, cb);
+
/*
* This is either an update, or the client dying; in either case,
* kill the old client:
*/
if (clp->cl_cb_client) {
+ trace_nfsd_cb_bc_shutdown(clp, cb);
rpc_shutdown_client(clp->cl_cb_client);
clp->cl_cb_client = NULL;
put_cred(clp->cl_cb_cred);
@@ -1435,13 +1451,15 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
}
if (test_bit(NFSD4_CLIENT_CB_KILL, &clp->cl_flags))
return;
+
spin_lock(&clp->cl_lock);
/*
* Only serialized callback code is allowed to clear these
* flags; main nfsd code can only set them:
*/
- BUG_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));
+ WARN_ON(!(clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK));
clear_bit(NFSD4_CLIENT_CB_UPDATE, &clp->cl_flags);
+
memcpy(&conn, &cb->cb_clp->cl_cb_conn, sizeof(struct nfs4_cb_conn));
c = __nfsd4_find_backchannel(clp);
if (c) {
@@ -1453,7 +1471,7 @@ static void nfsd4_process_cb_update(struct nfsd4_callback *cb)
err = setup_callback_client(clp, &conn, ses);
if (err) {
- nfsd4_mark_cb_down(clp, err);
+ nfsd4_mark_cb_down(clp);
if (c)
svc_xprt_put(c->cn_xprt);
return;
@@ -1469,12 +1487,7 @@ nfsd4_run_cb_work(struct work_struct *work)
struct rpc_clnt *clnt;
int flags;
- if (cb->cb_need_restart) {
- cb->cb_need_restart = false;
- } else {
- if (cb->cb_ops && cb->cb_ops->prepare)
- cb->cb_ops->prepare(cb);
- }
+ trace_nfsd_cb_start(clp);
if (clp->cl_flags & NFSD4_CLIENT_CB_FLAG_MASK)
nfsd4_process_cb_update(cb);
@@ -1495,6 +1508,12 @@ nfsd4_run_cb_work(struct work_struct *work)
return;
}
+ if (cb->cb_need_restart) {
+ cb->cb_need_restart = false;
+ } else {
+ if (cb->cb_ops && cb->cb_ops->prepare)
+ cb->cb_ops->prepare(cb);
+ }
cb->cb_msg.rpc_cred = clp->cl_cb_cred;
flags = clp->cl_minorversion ? RPC_TASK_NOCONNECT : RPC_TASK_SOFTCONN;
rpc_call_async(clnt, &cb->cb_msg, RPC_TASK_SOFT | flags,
@@ -1510,7 +1529,6 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
cb->cb_msg.rpc_resp = cb;
cb->cb_ops = ops;
INIT_WORK(&cb->cb_work, nfsd4_run_cb_work);
- cb->cb_seq_status = 1;
cb->cb_status = 0;
cb->cb_need_restart = false;
cb->cb_holds_slot = false;
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-30 10:11:27 +0000