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| author | J. Bruce Fields <bfields@redhat.com> | 2013-02-20 23:52:19 +0100 |
|---|---|---|
| committer | J. Bruce Fields <bfields@redhat.com> | 2013-02-28 18:47:17 +0100 |
| commit | dc107402ae06286a9ed33c32daf3f35514a7cb8d (patch) | |
| tree | 771882a1a62e2c56ae2c262764690417cecd776a | |
| parent | nfsd: fix compiler warning about ambiguous types in nfsd_cache_csum (diff) | |
| download | linux-dc107402ae06286a9ed33c32daf3f35514a7cb8d.tar.xz linux-dc107402ae06286a9ed33c32daf3f35514a7cb8d.zip | |
SUNRPC: make AF_LOCAL connect synchronous
It doesn't appear that anyone actually needs to connect asynchronously.
Also, using a workqueue for the connect means we lose the namespace
information from the original process. This is a problem since there's
no way to explicitly pass in a filesystem namespace for resolution of an
AF_LOCAL address.
Acked-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
| -rw-r--r-- | net/sunrpc/xprtsock.c | 35 |
1 files changed, 27 insertions, 8 deletions
diff --git a/net/sunrpc/xprtsock.c b/net/sunrpc/xprtsock.c index bbc09154df8d..4dc8eb24ac2c 100644 --- a/net/sunrpc/xprtsock.c +++ b/net/sunrpc/xprtsock.c @@ -1866,13 +1866,9 @@ static int xs_local_finish_connecting(struct rpc_xprt *xprt, * @xprt: RPC transport to connect * @transport: socket transport to connect * @create_sock: function to create a socket of the correct type - * - * Invoked by a work queue tasklet. */ -static void xs_local_setup_socket(struct work_struct *work) +static int xs_local_setup_socket(struct sock_xprt *transport) { - struct sock_xprt *transport = - container_of(work, struct sock_xprt, connect_worker.work); struct rpc_xprt *xprt = &transport->xprt; struct socket *sock; int status = -EIO; @@ -1917,6 +1913,31 @@ out: xprt_clear_connecting(xprt); xprt_wake_pending_tasks(xprt, status); current->flags &= ~PF_FSTRANS; + return status; +} + +static void xs_local_connect(struct rpc_task *task) +{ + struct rpc_xprt *xprt = task->tk_xprt; + struct sock_xprt *transport = container_of(xprt, struct sock_xprt, xprt); + int ret; + + if (RPC_IS_ASYNC(task)) { + /* + * We want the AF_LOCAL connect to be resolved in the + * filesystem namespace of the process making the rpc + * call. Thus we connect synchronously. + * + * If we want to support asynchronous AF_LOCAL calls, + * we'll need to figure out how to pass a namespace to + * connect. + */ + rpc_exit(task, -ENOTCONN); + return; + } + ret = xs_local_setup_socket(transport); + if (ret && !RPC_IS_SOFTCONN(task)) + msleep_interruptible(15000); } #ifdef CONFIG_SUNRPC_SWAP @@ -2454,7 +2475,7 @@ static struct rpc_xprt_ops xs_local_ops = { .alloc_slot = xprt_alloc_slot, .rpcbind = xs_local_rpcbind, .set_port = xs_local_set_port, - .connect = xs_connect, + .connect = xs_local_connect, .buf_alloc = rpc_malloc, .buf_free = rpc_free, .send_request = xs_local_send_request, @@ -2627,8 +2648,6 @@ static struct rpc_xprt *xs_setup_local(struct xprt_create *args) goto out_err; } xprt_set_bound(xprt); - INIT_DELAYED_WORK(&transport->connect_worker, - xs_local_setup_socket); xs_format_peer_addresses(xprt, "local", RPCBIND_NETID_LOCAL); break; default: |