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authorJeff Law <law@redhat.com>2012-11-28 14:12:28 -0700
committerJeff Law <law@redhat.com>2012-11-28 14:16:12 -0700
commit14bc93a967e62abf8cf2704725b6f76619399f83 (patch)
tree80ddd44c7357253f59d6477ced8266856ee9d247 /sunrpc
parentb54eb3cb0a4325975d9b82709865a055bc8da910 (diff)
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[BZ #14889]
* sunrpc/rpc/svc.h (__svc_accept_failed): New prototype. * sunrpc/svc.c: Include time.h. (__svc_accept_failed): New function. * sunrpc/svc_tcp.c (rendezvous_request): If the accept fails for any reason other than EINTR, call __svc_accept_failed. * sunrpc/svc_udp.c (svcudp_recv): Similarly. * sunrpc/svc_unix.c (rendezvous_request): Similarly.
Diffstat (limited to 'sunrpc')
-rw-r--r--sunrpc/rpc/svc.h18
-rw-r--r--sunrpc/svc.c33
-rw-r--r--sunrpc/svc_tcp.c18
-rw-r--r--sunrpc/svc_udp.c25
-rw-r--r--sunrpc/svc_unix.c18
5 files changed, 110 insertions, 2 deletions
diff --git a/sunrpc/rpc/svc.h b/sunrpc/rpc/svc.h
index 54d1ac1..58a5f7d 100644
--- a/sunrpc/rpc/svc.h
+++ b/sunrpc/rpc/svc.h
@@ -1,6 +1,23 @@
/*
* svc.h, Server-side remote procedure call interface.
*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ *
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@@ -316,4 +333,5 @@ extern SVCXPRT *svcunix_create (int __sock, u_int __sendsize, u_int __recvsize,
__END_DECLS
+extern void __svc_accept_failed (void) attribute_hidden;
#endif /* rpc/svc.h */
diff --git a/sunrpc/svc.c b/sunrpc/svc.c
index 103770a..736d4a9 100644
--- a/sunrpc/svc.c
+++ b/sunrpc/svc.c
@@ -4,6 +4,23 @@
* There are two sets of procedures here. The xprt routines are
* for handling transport handles. The svc routines handle the
* list of service routines.
+ * Copyright (C) 2002-2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ * Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
*
* Copyright (c) 2010, Oracle America, Inc.
*
@@ -41,6 +58,7 @@
#include <rpc/svc.h>
#include <rpc/pmap_clnt.h>
#include <sys/poll.h>
+#include <time.h>
#ifdef _RPC_THREAD_SAFE_
#define xports RPC_THREAD_VARIABLE(svc_xports_s)
@@ -544,6 +562,21 @@ svc_getreq_common (const int fd)
}
libc_hidden_nolink_sunrpc (svc_getreq_common, GLIBC_2_2)
+/* If there are no file descriptors available, then accept will fail.
+ We want to delay here so the connection request can be dequeued;
+ otherwise we can bounce between polling and accepting, never giving the
+ request a chance to dequeue and eating an enormous amount of cpu time
+ in svc_run if we're polling on many file descriptors. */
+void
+__svc_accept_failed (void)
+{
+ if (errno == EMFILE)
+ {
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 50000000 };
+ __nanosleep (&ts, NULL);
+ }
+}
+
#ifdef _RPC_THREAD_SAFE_
void
diff --git a/sunrpc/svc_tcp.c b/sunrpc/svc_tcp.c
index eb61549..1fdb0ad 100644
--- a/sunrpc/svc_tcp.c
+++ b/sunrpc/svc_tcp.c
@@ -1,6 +1,23 @@
/*
* svc_tcp.c, Server side for TCP/IP based RPC.
*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ *
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@@ -247,6 +264,7 @@ again:
{
if (errno == EINTR)
goto again;
+ __svc_accept_failed ();
return FALSE;
}
/*
diff --git a/sunrpc/svc_udp.c b/sunrpc/svc_udp.c
index 6c4d75a..3324e2a 100644
--- a/sunrpc/svc_udp.c
+++ b/sunrpc/svc_udp.c
@@ -3,6 +3,23 @@
* Server side for UDP/IP based RPC. (Does some caching in the hopes of
* achieving execute-at-most-once semantics.)
*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ *
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@@ -277,8 +294,12 @@ again:
(int) su->su_iosz, 0,
(struct sockaddr *) &(xprt->xp_raddr), &len);
xprt->xp_addrlen = len;
- if (rlen == -1 && errno == EINTR)
- goto again;
+ if (rlen == -1)
+ {
+ if (errno == EINTR)
+ goto again;
+ __svc_accept_failed ();
+ }
if (rlen < 16) /* < 4 32-bit ints? */
return FALSE;
xdrs->x_op = XDR_DECODE;
diff --git a/sunrpc/svc_unix.c b/sunrpc/svc_unix.c
index 94507b2..5c3184a 100644
--- a/sunrpc/svc_unix.c
+++ b/sunrpc/svc_unix.c
@@ -1,6 +1,23 @@
/*
* svc_unix.c, Server side for TCP/IP based RPC.
*
+ * Copyright (C) 2012 Free Software Foundation, Inc.
+ * This file is part of the GNU C Library.
+ *
+ * The GNU C Library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * The GNU C Library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with the GNU C Library; if not, see
+ * <http://www.gnu.org/licenses/>.
+ *
* Copyright (c) 2010, Oracle America, Inc.
*
* Redistribution and use in source and binary forms, with or without
@@ -244,6 +261,7 @@ again:
{
if (errno == EINTR)
goto again;
+ __svc_accept_failed ();
return FALSE;
}
/*