diff options
Diffstat (limited to 'fs/lockd/host.c')
| -rw-r--r-- | fs/lockd/host.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/fs/lockd/host.c b/fs/lockd/host.c index 1a9582a10a86..015900d2d4c2 100644 --- a/fs/lockd/host.c +++ b/fs/lockd/host.c @@ -306,6 +306,35 @@ void nlmclnt_release_host(struct nlm_host *host) } } +/* Callback for rpc_cancel_tasks() - matches all tasks for cancellation */ +static bool nlmclnt_match_all(const struct rpc_task *task, const void *data) +{ + return true; +} + +/** + * nlmclnt_shutdown_rpc_clnt - safely shut down NLM client RPC operations + * @host: nlm_host to shut down + * + * Cancels outstanding RPC tasks and marks the client as shut down. + * Synchronizes with nlmclnt_release_host() via nlm_host_mutex to prevent + * races between shutdown and host destruction. Safe to call if h_rpcclnt + * is NULL or already shut down. + */ +void nlmclnt_shutdown_rpc_clnt(struct nlm_host *host) +{ + struct rpc_clnt *clnt; + + mutex_lock(&nlm_host_mutex); + clnt = host->h_rpcclnt; + if (clnt) { + clnt->cl_shutdown = 1; + rpc_cancel_tasks(clnt, -EIO, nlmclnt_match_all, NULL); + } + mutex_unlock(&nlm_host_mutex); +} +EXPORT_SYMBOL_GPL(nlmclnt_shutdown_rpc_clnt); + /** * nlmsvc_lookup_host - Find an NLM host handle matching a remote client * @rqstp: incoming NLM request |