Merge changes between r14014 and r14127 from /fsf/trunk.

git-svn-id: svn://svn.eglibc.org/trunk@14282 7b3dc134-2b1b-0410-93df-9e9f96275f8d

17 files changed, 182 insertions, 18 deletions

diff --git a/libc/sysdeps/unix/sysv/linux/Makefile b/libc/sysdeps/unix/sysv/linux/Makefile
index 4e69d22f4..55e92c7b4 100644
--- a/libc/sysdeps/unix/sysv/linux/Makefile
+++ b/libc/sysdeps/unix/sysv/linux/Makefile
@@ -12,7 +12,8 @@ CFLAGS-malloc.c += -DMORECORE_CLEARS=2
 endif
 
 ifeq ($(subdir),socket)
-sysdep_routines += internal_accept4 recvmmsg internal_recvmmsg
+sysdep_routines += internal_accept4 recvmmsg internal_recvmmsg sendmmsg \
+		   internal_sendmmsg
 endif
 
 ifeq ($(subdir),misc)
diff --git a/libc/sysdeps/unix/sysv/linux/Versions b/libc/sysdeps/unix/sysv/linux/Versions
index 29099dc5c..3a3e8e8c2 100644
--- a/libc/sysdeps/unix/sysv/linux/Versions
+++ b/libc/sysdeps/unix/sysv/linux/Versions
@@ -158,6 +158,10 @@ libc {
     clock_adjtime;
 
     name_to_handle_at; open_by_handle_at;
+
+    setns;
+
+    sendmmsg;
   }
   GLIBC_PRIVATE {
     # functions used in other libraries
diff --git a/libc/sysdeps/unix/sysv/linux/bits/sched.h b/libc/sysdeps/unix/sysv/linux/bits/sched.h
index 8ba9eed6f..b222fb211 100644
--- a/libc/sysdeps/unix/sysv/linux/bits/sched.h
+++ b/libc/sysdeps/unix/sysv/linux/bits/sched.h
@@ -1,6 +1,6 @@
 /* Definitions of constants and data structure for POSIX 1003.1b-1993
    scheduling interface.
-   Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009
+   Copyright (C) 1996-1999,2001-2003,2005,2006,2007,2008,2009,2011
    Free Software Foundation, Inc.
    This file is part of the GNU C Library.
 
@@ -37,7 +37,7 @@
 # define SCHED_RESET_ON_FORK	0x40000000
 #endif
 
-#ifdef __USE_MISC
+#ifdef __USE_GNU
 /* Cloning flags.  */
 # define CSIGNAL       0x000000ff /* Signal mask to be sent at exit.  */
 # define CLONE_VM      0x00000100 /* Set if VM shared between processes.  */
@@ -78,7 +78,7 @@ struct sched_param
 
 __BEGIN_DECLS
 
-#ifdef __USE_MISC
+#ifdef __USE_GNU
 /* Clone current process.  */
 extern int clone (int (*__fn) (void *__arg), void *__child_stack,
 		  int __flags, void *__arg, ...) __THROW;
@@ -88,8 +88,12 @@ extern int unshare (int __flags) __THROW;
 
 /* Get index of currently used CPU.  */
 extern int sched_getcpu (void) __THROW;
+
+/* Switch process to namespace of type NSTYPE indicated by FD.  */
+extern int setns (int __fd, int __nstype) __THROW;
 #endif
 
+
 __END_DECLS
 
 #endif	/* need schedparam */
diff --git a/libc/sysdeps/unix/sysv/linux/bits/siginfo.h b/libc/sysdeps/unix/sysv/linux/bits/siginfo.h
index 4ce319dc9..d3dd4c21d 100644
--- a/libc/sysdeps/unix/sysv/linux/bits/siginfo.h
+++ b/libc/sysdeps/unix/sysv/linux/bits/siginfo.h
@@ -1,5 +1,5 @@
 /* siginfo_t, sigevent and constants.  Linux version.
-   Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1997-2002, 2003, 2011 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
@@ -142,7 +142,7 @@ enum
 # define SI_TIMER	SI_TIMER
   SI_QUEUE,			/* Sent by sigqueue.  */
 # define SI_QUEUE	SI_QUEUE
-  SI_USER,			/* Sent by kill, sigsend, raise.  */
+  SI_USER,			/* Sent by kill, sigsend.  */
 # define SI_USER	SI_USER
   SI_KERNEL = 0x80		/* Send by kernel.  */
 #define SI_KERNEL	SI_KERNEL
diff --git a/libc/sysdeps/unix/sysv/linux/bits/socket.h b/libc/sysdeps/unix/sysv/linux/bits/socket.h
index 637375791..96d9fed03 100644
--- a/libc/sysdeps/unix/sysv/linux/bits/socket.h
+++ b/libc/sysdeps/unix/sysv/linux/bits/socket.h
@@ -421,7 +421,7 @@ struct linger
 
 __BEGIN_DECLS
 
-/* Receive a message as described by MESSAGE from socket FD.
+/* Receive up to VLEN messages as described by VMESSAGES from socket FD.
    Returns the number of bytes read or -1 for errors.
 
    This function is a cancellation point and therefore not marked with
@@ -430,6 +430,13 @@ extern int recvmmsg (int __fd, struct mmsghdr *__vmessages,
 		     unsigned int __vlen, int __flags,
 		     __const struct timespec *__tmo);
 
+/* Send a VLEN messages as described by VMESSAGES to socket FD.
+   Return the number of datagrams successfully written or -1 for errors.
+This function is a cancellation point and therefore not marked with
+   __THROW.  */
+extern int sendmmsg (int __fd, struct mmsghdr *__vmessages,
+		     unsigned int __vlen, int __flags);
+
 __END_DECLS
 
 #endif	/* bits/socket.h */
diff --git a/libc/sysdeps/unix/sysv/linux/dl-osinfo.h b/libc/sysdeps/unix/sysv/linux/dl-osinfo.h
index eb7fedc07..28fce4f8e 100644
--- a/libc/sysdeps/unix/sysv/linux/dl-osinfo.h
+++ b/libc/sysdeps/unix/sysv/linux/dl-osinfo.h
@@ -81,7 +81,7 @@ _dl_setup_stack_chk_guard (void *dl_random)
 	{
 	  ssize_t reslen = read_not_cancel (fd, ret.bytes + 1, filllen);
 	  close_not_cancel_no_status (fd);
-	  if (reslen == (ssize_) filllen)
+	  if (reslen == (ssize_t) filllen)
 	    return ret.num;
 	}
 # endif
diff --git a/libc/sysdeps/unix/sysv/linux/ia64/bits/siginfo.h b/libc/sysdeps/unix/sysv/linux/ia64/bits/siginfo.h
index 240ebbc9e..fea5af7fb 100644
--- a/libc/sysdeps/unix/sysv/linux/ia64/bits/siginfo.h
+++ b/libc/sysdeps/unix/sysv/linux/ia64/bits/siginfo.h
@@ -1,5 +1,5 @@
 /* siginfo_t, sigevent and constants.  Linux/ia64 version.
-   Copyright (C) 2000-2004, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2000-2004, 2009, 2011 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
 
@@ -146,7 +146,7 @@ enum
 # define SI_TIMER	SI_TIMER
   SI_QUEUE,			/* Sent by sigqueue.  */
 # define SI_QUEUE	SI_QUEUE
-  SI_USER,			/* Sent by kill, sigsend, raise.  */
+  SI_USER,			/* Sent by kill, sigsend.  */
 # define SI_USER	SI_USER
   SI_KERNEL = 0x80		/* Send by kernel.  */
 #define SI_KERNEL	SI_KERNEL
diff --git a/libc/sysdeps/unix/sysv/linux/internal_sendmmsg.S b/libc/sysdeps/unix/sysv/linux/internal_sendmmsg.S
new file mode 100644
index 000000000..f5152c9f1
--- /dev/null
+++ b/libc/sysdeps/unix/sysv/linux/internal_sendmmsg.S
@@ -0,0 +1,14 @@
+#include <kernel-features.h>
+#include <sys/syscall.h>
+#if !defined __NR_sendmmsg && defined __NR_socketcall
+# define socket	sendmmsg
+# ifdef __ASSUME_SENDMMSG
+#  define __socket sendmmsg
+# else
+#  define __socket __internal_sendmmsg
+# endif
+# define NARGS 4
+# define NEED_CANCELLATION
+# define NO_WEAK_ALIAS
+# include <socket.S>
+#endif
diff --git a/libc/sysdeps/unix/sysv/linux/kernel-features.h b/libc/sysdeps/unix/sysv/linux/kernel-features.h
index d78f1015d..d91f581a9 100644
--- a/libc/sysdeps/unix/sysv/linux/kernel-features.h
+++ b/libc/sysdeps/unix/sysv/linux/kernel-features.h
@@ -541,3 +541,8 @@
 #if __LINUX_KERNEL_VERSION >= 0x020624
 # define __ASSUME_PRLIMIT64	1
 #endif
+
+/* sendmmsg is available in 2.6.39.  */
+#if __LINUX_KERNEL_VERSION >= 0x020627
+# define __ASSUME_SENDMMSG	1
+#endif
diff --git a/libc/sysdeps/unix/sysv/linux/s390/bits/siginfo.h b/libc/sysdeps/unix/sysv/linux/s390/bits/siginfo.h
index 55b3f88c0..70d91b470 100644
--- a/libc/sysdeps/unix/sysv/linux/s390/bits/siginfo.h
+++ b/libc/sysdeps/unix/sysv/linux/s390/bits/siginfo.h
@@ -1,5 +1,5 @@
 /* siginfo_t, sigevent and constants.  S/390 version.
-   Copyright (C) 2001, 2002, 2003, 2009 Free Software Foundation, Inc.
+   Copyright (C) 2001, 2002, 2003, 2009, 2011 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
@@ -144,7 +144,7 @@ enum
 # define SI_TIMER	SI_TIMER
   SI_QUEUE,			/* Sent by sigqueue.  */
 # define SI_QUEUE	SI_QUEUE
-  SI_USER,			/* Sent by kill, sigsend, raise.  */
+  SI_USER,			/* Sent by kill, sigsend.  */
 # define SI_USER	SI_USER
   SI_KERNEL = 0x80		/* Send by kernel.  */
 #define SI_KERNEL	SI_KERNEL
diff --git a/libc/sysdeps/unix/sysv/linux/sendmmsg.c b/libc/sysdeps/unix/sysv/linux/sendmmsg.c
new file mode 100644
index 000000000..d8099878a
--- /dev/null
+++ b/libc/sysdeps/unix/sysv/linux/sendmmsg.c
@@ -0,0 +1,96 @@
+/* Copyright (C) 2011 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
+
+   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, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#include <errno.h>
+#include <sys/socket.h>
+
+#include <sysdep-cancel.h>
+#include <sys/syscall.h>
+#include <kernel-features.h>
+
+
+#ifdef __NR_sendmmsg
+int
+sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
+{
+  if (SINGLE_THREAD_P)
+    return INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags);
+
+  int oldtype = LIBC_CANCEL_ASYNC ();
+
+  int result = INLINE_SYSCALL (sendmmsg, 4, fd, vmessages, vlen, flags);
+
+  LIBC_CANCEL_RESET (oldtype);
+
+  return result;
+}
+#elif defined __NR_socketcall
+# ifndef __ASSUME_SENDMMSG
+extern int __internal_sendmmsg (int fd, struct mmsghdr *vmessages,
+				unsigned int vlen, int flags)
+     attribute_hidden;
+
+static int have_sendmmsg;
+
+int
+sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
+{
+  if (__builtin_expect (have_sendmmsg >= 0, 1))
+    {
+      int ret = __internal_sendmmsg (fd, vmessages, vlen, flags);
+      /* The kernel returns -EINVAL for unknown socket operations.
+	 We need to convert that error to an ENOSYS error.  */
+      if (__builtin_expect (ret < 0, 0)
+	  && have_sendmmsg == 0
+	  && errno == EINVAL)
+	{
+	  /* Try another call, this time with an invalid file
+	     descriptor and all other parameters cleared.  This call
+	     will not cause any harm and it will return
+	     immediately.  */
+	  ret = __internal_sendmmsg (-1, 0, 0, 0);
+	  if (errno == EINVAL)
+	    {
+	      have_sendmmsg = -1;
+	      __set_errno (ENOSYS);
+	    }
+	  else
+	    {
+	      have_sendmmsg = 1;
+	      __set_errno (EINVAL);
+	    }
+	  return -1;
+	}
+      return ret;
+    }
+  __set_errno (ENOSYS);
+  return -1;
+}
+# else
+/* When __ASSUME_SENDMMSG sendmmsg is defined in internal_sendmmsg.S.  */
+# endif
+#else
+int
+sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
+{
+  __set_errno (ENOSYS);
+  return -1;
+}
+stub_warning (sendmmsg)
+#endif
diff --git a/libc/sysdeps/unix/sysv/linux/socketcall.h b/libc/sysdeps/unix/sysv/linux/socketcall.h
index bab4e4a51..73d4cb9de 100644
--- a/libc/sysdeps/unix/sysv/linux/socketcall.h
+++ b/libc/sysdeps/unix/sysv/linux/socketcall.h
@@ -1,5 +1,5 @@
 /* ID for functions called via socketcall system call.
-   Copyright (C) 1995, 1996, 2008, 2009 Free Software Foundation, Inc.
+   Copyright (C) 1995, 1996, 2008, 2009, 2011 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
@@ -45,5 +45,6 @@
 #define SOCKOP_recvmsg		17
 #define SOCKOP_accept4		18
 #define SOCKOP_recvmmsg		19
+#define SOCKOP_sendmmsg		20
 
 #endif /* sys/socketcall.h */
diff --git a/libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h b/libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h
index c0f98f607..aeba3fb35 100644
--- a/libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h
+++ b/libc/sysdeps/unix/sysv/linux/sparc/bits/siginfo.h
@@ -1,5 +1,5 @@
 /* siginfo_t, sigevent and constants.  Linux/SPARC version.
-   Copyright (C) 1997-2002, 2003 Free Software Foundation, Inc.
+   Copyright (C) 1997-2002, 2003, 2011 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
@@ -144,7 +144,7 @@ enum
 # define SI_TIMER	SI_TIMER
   SI_QUEUE,			/* Sent by sigqueue.  */
 # define SI_QUEUE	SI_QUEUE
-  SI_USER,			/* Sent by kill, sigsend, raise.  */
+  SI_USER,			/* Sent by kill, sigsend.  */
 # define SI_USER	SI_USER
   SI_KERNEL = 0x80		/* Send by kernel.  */
 #define SI_KERNEL	SI_KERNEL
diff --git a/libc/sysdeps/unix/sysv/linux/syscalls.list b/libc/sysdeps/unix/sysv/linux/syscalls.list
index 051303f07..2bed9e99e 100644
--- a/libc/sysdeps/unix/sysv/linux/syscalls.list
+++ b/libc/sysdeps/unix/sysv/linux/syscalls.list
@@ -107,3 +107,5 @@ fanotify_init	EXTRA	fanotify_init	i:ii	fanotify_init
 
 name_to_handle_at EXTRA	name_to_handle_at i:isppi name_to_handle_at
 open_by_handle_at EXTRA	open_by_handle_at Ci:ipi  open_by_handle_at
+
+setns		EXTRA	setns		i:ii	setns
diff --git a/libc/sysdeps/unix/sysv/linux/x86_64/init-first.c b/libc/sysdeps/unix/sysv/linux/x86_64/init-first.c
index ead7dbcc3..e676f623e 100644
--- a/libc/sysdeps/unix/sysv/linux/x86_64/init-first.c
+++ b/libc/sysdeps/unix/sysv/linux/x86_64/init-first.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2007, 2011 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
@@ -26,6 +26,10 @@ long int (*__vdso_clock_gettime) (clockid_t, struct timespec *)
   __attribute__ ((nocommon));
 strong_alias (__vdso_clock_gettime, __GI___vdso_clock_gettime attribute_hidden)
 
+long int (*__vdso_getcpu) (unsigned *, unsigned *, void *);
+
+long int (*__vdso_time) (time_t *) attribute_hidden;
+
 
 static inline void
 _libc_vdso_platform_setup (void)
@@ -43,6 +47,22 @@ _libc_vdso_platform_setup (void)
   p = _dl_vdso_vsym ("clock_gettime", &linux26);
   PTR_MANGLE (p);
   __GI___vdso_clock_gettime = p;
+
+  p = _dl_vdso_vsym ("getcpu", &linux26);
+  /* If the vDSO is not available we fall back on the old vsyscall.  */
+#define VSYSCALL_ADDR_vgetcpu	0xffffffffff600800
+  if (p == NULL)
+    p = (void *) VSYSCALL_ADDR_vgetcpu;
+  PTR_MANGLE (p);
+  __vdso_getcpu = p;
+
+  p = _dl_vdso_vsym ("time", &linux26);
+  /* If the vDSO is not available we fall back on the old vsyscall.  */
+#define VSYSCALL_ADDR_vtime	0xffffffffff600400
+  if (p == NULL)
+    p = (void *) VSYSCALL_ADDR_vtime;
+  PTR_MANGLE (p);
+  __vdso_time = p;
 }
 
 # define VDSO_SETUP _libc_vdso_platform_setup
diff --git a/libc/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S b/libc/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
index a95099062..8ec7d3fcd 100644
--- a/libc/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
+++ b/libc/sysdeps/unix/sysv/linux/x86_64/sched_getcpu.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2007 Free Software Foundation, Inc.
+/* Copyright (C) 2007, 2011 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
@@ -35,7 +35,12 @@ ENTRY (sched_getcpu)
 	movl	$VGETCPU_CACHE_OFFSET, %edx
 	addq	%fs:0, %rdx
 
+#ifdef SHARED
+	movq	__vdso_getcpu(%rip), %rax
+	PTR_DEMANGLE (%rax)
+#else
 	movq	$VSYSCALL_ADDR_vgetcpu, %rax
+#endif
 	callq	*%rax
 
 	cmpq	$-4095, %rax
diff --git a/libc/sysdeps/unix/sysv/linux/x86_64/time.S b/libc/sysdeps/unix/sysv/linux/x86_64/time.S
index e3f326876..66d7498ce 100644
--- a/libc/sysdeps/unix/sysv/linux/x86_64/time.S
+++ b/libc/sysdeps/unix/sysv/linux/x86_64/time.S
@@ -1,4 +1,4 @@
-/* Copyright (C) 2001,02, 2003 Free Software Foundation, Inc.
+/* Copyright (C) 2001,02, 2003, 2011 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
@@ -32,7 +32,12 @@ ENTRY (time)
 	sub	$0x8, %rsp
 	cfi_adjust_cfa_offset(8)
 
+#ifdef SHARED
+	movq	__vdso_time(%rip), %rax
+	PTR_DEMANGLE (%rax)
+#else
 	movq	$VSYSCALL_ADDR_vtime, %rax
+#endif
 	callq	*%rax
 
 	add	$0x8, %rsp