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| author | Chuck Lever <cel@netapp.com> | 2006-01-03 09:55:50 +0100 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2006-01-06 14:58:56 -0500 |
| commit | 35f5a422ce1af836007f811b613c440d0e348e06 (patch) | |
| tree | 25aac5cccce27a6ed5ebb4e161f813af2adbaf56 | |
| parent | 02107148349f31eee7c0fb06fd7a880df73dbd20 (diff) | |
| download | linux-3.10-35f5a422ce1af836007f811b613c440d0e348e06.tar.gz linux-3.10-35f5a422ce1af836007f811b613c440d0e348e06.tar.bz2 linux-3.10-35f5a422ce1af836007f811b613c440d0e348e06.zip | |
SUNRPC: new interface to force an RPC rebind
We'd like to hide fields in rpc_xprt and rpc_clnt from upper layer protocols.
Start by creating an API to force RPC rebind, replacing logic that simply
sets cl_port to zero.
Test-plan:
Destructive testing (unplugging the network temporarily). Connectathon
with UDP and TCP. NFSv2/3 and NFSv4 mounting should be carefully checked.
Probably need to rig a server where certain services aren't running, or
that returns an error for some typical operation.
Signed-off-by: Chuck Lever <cel@netapp.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
| -rw-r--r-- | fs/lockd/host.c | 4 | ||||
| -rw-r--r-- | include/linux/sunrpc/clnt.h | 1 | ||||
| -rw-r--r-- | net/sunrpc/clnt.c | 21 |
3 files changed, 18 insertions, 8 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index c4c8601096e..82f7a0b1d8a 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -177,7 +177,7 @@ nlm_bind_host(struct nlm_host *host) if ((clnt = host->h_rpcclnt) != NULL) { xprt = clnt->cl_xprt; if (time_after_eq(jiffies, host->h_nextrebind)) { - clnt->cl_port = 0; + rpc_force_rebind(clnt); host->h_nextrebind = jiffies + NLM_HOST_REBIND; dprintk("lockd: next rebind in %ld jiffies\n", host->h_nextrebind - jiffies); @@ -217,7 +217,7 @@ nlm_rebind_host(struct nlm_host *host) { dprintk("lockd: rebind host %s\n", host->h_name); if (host->h_rpcclnt && time_after_eq(jiffies, host->h_nextrebind)) { - host->h_rpcclnt->cl_port = 0; + rpc_force_rebind(host->h_rpcclnt); host->h_nextrebind = jiffies + NLM_HOST_REBIND; } } diff --git a/include/linux/sunrpc/clnt.h b/include/linux/sunrpc/clnt.h index b0ab959eca6..3d605765f84 100644 --- a/include/linux/sunrpc/clnt.h +++ b/include/linux/sunrpc/clnt.h @@ -135,6 +135,7 @@ void rpc_clnt_sigmask(struct rpc_clnt *clnt, sigset_t *oldset); void rpc_clnt_sigunmask(struct rpc_clnt *clnt, sigset_t *oldset); void rpc_setbufsize(struct rpc_clnt *, unsigned int, unsigned int); size_t rpc_max_payload(struct rpc_clnt *); +void rpc_force_rebind(struct rpc_clnt *); int rpc_ping(struct rpc_clnt *clnt, int flags); static __inline__ diff --git a/net/sunrpc/clnt.c b/net/sunrpc/clnt.c index 25cba94c568..2789d3083fe 100644 --- a/net/sunrpc/clnt.c +++ b/net/sunrpc/clnt.c @@ -538,6 +538,18 @@ size_t rpc_max_payload(struct rpc_clnt *clnt) } EXPORT_SYMBOL(rpc_max_payload); +/** + * rpc_force_rebind - force transport to check that remote port is unchanged + * @clnt: client to rebind + * + */ +void rpc_force_rebind(struct rpc_clnt *clnt) +{ + if (clnt->cl_autobind) + clnt->cl_port = 0; +} +EXPORT_SYMBOL(rpc_force_rebind); + /* * Restart an (async) RPC call. Usually called from within the * exit handler. @@ -853,8 +865,7 @@ call_connect_status(struct rpc_task *task) } /* Something failed: remote service port may have changed */ - if (clnt->cl_autobind) - clnt->cl_port = 0; + rpc_force_rebind(clnt); switch (status) { case -ENOTCONN: @@ -935,8 +946,7 @@ call_status(struct rpc_task *task) break; case -ECONNREFUSED: case -ENOTCONN: - if (clnt->cl_autobind) - clnt->cl_port = 0; + rpc_force_rebind(clnt); task->tk_action = call_bind; break; case -EAGAIN: @@ -995,8 +1005,7 @@ call_timeout(struct rpc_task *task) printk(KERN_NOTICE "%s: server %s not responding, still trying\n", clnt->cl_protname, clnt->cl_server); } - if (clnt->cl_autobind) - clnt->cl_port = 0; + rpc_force_rebind(clnt); retry: clnt->cl_stats->rpcretrans++; |