From 1227a74e2e0217a4ca155d1677bdbf5f69e32bed Mon Sep 17 00:00:00 2001 From: Jeff Layton Date: Tue, 19 Feb 2008 12:51:35 -0500 Subject: NFS: flush signals before taking down callback thread Now that the reference counting on the callback thread is working as expected, it uncovers another problem. Peter Staubach noticed while testing that patch on an older kernel that he would occasionally see this printk in rpc_register fire: "RPC: failed to contact portmap (errno -512). The NFSv4 callback thread is signaled by nfs_callback_down(), but never flushes that signal. All of the shutdown processing is done with that signal pending. This makes it fail the call to unregister the port with the portmapper. In actuality, this rpc_register call isn't necessary at all since the port isn't actually registered with the portmapper anymore. Regardless, there doesn't seem to be any reason to leave the signal pending while the thread is being shut down and flushing it should generally silence that printk. Signed-off-by: Jeff Layton Signed-off-by: Trond Myklebust --- fs/nfs/callback.c | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/nfs/callback.c') diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index ecc06c61949..0d784f6f609 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -93,6 +93,7 @@ static void nfs_callback_svc(struct svc_rqst *rqstp) svc_process(rqstp); } + flush_signals(current); svc_exit_thread(rqstp); nfs_callback_info.pid = 0; complete(&nfs_callback_info.stopped); -- cgit v1.2.3-70-g09d2 From 5216a8e70e25b01cbd2915cd0442fb96deb2c262 Mon Sep 17 00:00:00 2001 From: Pavel Emelyanov Date: Thu, 21 Feb 2008 10:57:45 +0300 Subject: Wrap buffers used for rpc debug printks into RPC_IFDEBUG Sorry for the noise, but here's the v3 of this compilation fix :) There are some places, which declare the char buf[...] on the stack to push it later into dprintk(). Since the dprintk sometimes (if the CONFIG_SYSCTL=n) becomes an empty do { } while (0) stub, these buffers cause gcc to produce appropriate warnings. Wrap these buffers with RPC_IFDEBUG macro, as Trond proposed, to compile them out when not needed. Signed-off-by: Pavel Emelyanov Acked-by: J. Bruce Fields Signed-off-by: Trond Myklebust --- fs/lockd/svc.c | 2 +- fs/nfs/callback.c | 2 +- fs/nfsd/nfsfh.c | 2 +- net/sunrpc/svcsock.c | 6 +++--- 4 files changed, 6 insertions(+), 6 deletions(-) (limited to 'fs/nfs/callback.c') diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c index 08226464e56..1ed8bd4de94 100644 --- a/fs/lockd/svc.c +++ b/fs/lockd/svc.c @@ -153,7 +153,7 @@ lockd(struct svc_rqst *rqstp) */ while ((nlmsvc_users || !signalled()) && nlmsvc_pid == current->pid) { long timeout = MAX_SCHEDULE_TIMEOUT; - char buf[RPC_MAX_ADDRBUFLEN]; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); if (signalled()) { flush_signals(current); diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c index 0d784f6f609..66648dd92d9 100644 --- a/fs/nfs/callback.c +++ b/fs/nfs/callback.c @@ -172,7 +172,7 @@ void nfs_callback_down(void) static int nfs_callback_authenticate(struct svc_rqst *rqstp) { struct nfs_client *clp; - char buf[RPC_MAX_ADDRBUFLEN]; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); /* Don't talk to strangers */ clp = nfs_find_client(svc_addr(rqstp), 4); diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c index 0130b345234..1eb771d79cc 100644 --- a/fs/nfsd/nfsfh.c +++ b/fs/nfsd/nfsfh.c @@ -101,7 +101,7 @@ static __be32 nfsd_setuser_and_check_port(struct svc_rqst *rqstp, { /* Check if the request originated from a secure port. */ if (!rqstp->rq_secure && EX_SECURE(exp)) { - char buf[RPC_MAX_ADDRBUFLEN]; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk(KERN_WARNING "nfsd: request from insecure port %s!\n", svc_print_addr(rqstp, buf, sizeof(buf))); diff --git a/net/sunrpc/svcsock.c b/net/sunrpc/svcsock.c index 1d3e5fcc2cc..c475977de05 100644 --- a/net/sunrpc/svcsock.c +++ b/net/sunrpc/svcsock.c @@ -175,7 +175,7 @@ static int svc_sendto(struct svc_rqst *rqstp, struct xdr_buf *xdr) size_t base = xdr->page_base; unsigned int pglen = xdr->page_len; unsigned int flags = MSG_MORE; - char buf[RPC_MAX_ADDRBUFLEN]; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); slen = xdr->len; @@ -716,7 +716,7 @@ static struct svc_xprt *svc_tcp_accept(struct svc_xprt *xprt) struct socket *newsock; struct svc_sock *newsvsk; int err, slen; - char buf[RPC_MAX_ADDRBUFLEN]; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk("svc: tcp_accept %p sock %p\n", svsk, sock); if (!sock) @@ -1206,10 +1206,10 @@ static struct svc_xprt *svc_create_socket(struct svc_serv *serv, struct socket *sock; int error; int type; - char buf[RPC_MAX_ADDRBUFLEN]; struct sockaddr_storage addr; struct sockaddr *newsin = (struct sockaddr *)&addr; int newlen; + RPC_IFDEBUG(char buf[RPC_MAX_ADDRBUFLEN]); dprintk("svc: svc_create_socket(%s, %d, %s)\n", serv->sv_program->pg_name, protocol, -- cgit v1.2.3-70-g09d2