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Date: Tue, 6 May 2008 19:36:33 -0400
From: Ulrich Drepper <drepper@...hat.com>
To: linux-kernel@...r.kernel.org
Cc: akpm@...ux-foundation.org, davidel@...ilserver.org,
torvalds@...ux-foundation.org
Subject: [PATCH] flag parameters add-on: remove epoll_create size param
This patch is to be applied on top of the series which adds the flag
parameters. It removes the size parameter from the new epoll_create
syscall and renames the syscall itself. The updated test program
follows.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#include <fcntl.h>
#include <stdio.h>
#include <time.h>
#include <unistd.h>
#include <sys/syscall.h>
#ifndef __NR_epoll_create2
# ifdef __x86_64__
# define __NR_epoll_create2 291
# elif defined __i386__
# define __NR_epoll_create2 329
# else
# error "need __NR_epoll_create2"
# endif
#endif
#define EPOLL_CLOEXEC O_CLOEXEC
int
main (void)
{
int fd = syscall (__NR_epoll_create2, 0);
if (fd == -1)
{
puts ("epoll_create2(0) failed");
return 1;
}
int coe = fcntl (fd, F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if (coe & FD_CLOEXEC)
{
puts ("epoll_create2(0) set close-on-exec flag");
return 1;
}
close (fd);
fd = syscall (__NR_epoll_create2, EPOLL_CLOEXEC);
if (fd == -1)
{
puts ("epoll_create2(EPOLL_CLOEXEC) failed");
return 1;
}
coe = fcntl (fd, F_GETFD);
if (coe == -1)
{
puts ("fcntl failed");
return 1;
}
if ((coe & FD_CLOEXEC) == 0)
{
puts ("epoll_create2(EPOLL_CLOEXEC) set close-on-exec flag");
return 1;
}
close (fd);
puts ("OK");
return 0;
}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/ia32/ia32entry.S | 2 +-
arch/x86/kernel/syscall_table_32.S | 2 +-
fs/eventpoll.c | 18 ++++++++++--------
include/asm-x86/unistd_32.h | 2 +-
include/asm-x86/unistd_64.h | 4 ++--
include/linux/eventpoll.h | 2 +-
include/linux/syscalls.h | 2 +-
7 files changed, 17 insertions(+), 15 deletions(-)
Signed-off-by: Ulrich Drepper <drepper@...hat.com>
diff --git a/arch/x86/ia32/ia32entry.S b/arch/x86/ia32/ia32entry.S
index 37e4992..8fab3b5 100644
--- a/arch/x86/ia32/ia32entry.S
+++ b/arch/x86/ia32/ia32entry.S
@@ -733,7 +733,7 @@ ia32_sys_call_table:
.quad compat_sys_timerfd_gettime
.quad compat_sys_signalfd4
.quad sys_eventfd2
- .quad sys_epoll_create2
+ .quad sys_epoll_create1
.quad sys_dup3 /* 330 */
.quad sys_pipe2
.quad sys_inotify_init1
diff --git a/arch/x86/kernel/syscall_table_32.S b/arch/x86/kernel/syscall_table_32.S
index f59aba5..d44395f 100644
--- a/arch/x86/kernel/syscall_table_32.S
+++ b/arch/x86/kernel/syscall_table_32.S
@@ -328,7 +328,7 @@ ENTRY(sys_call_table)
.long sys_timerfd_gettime
.long sys_signalfd4
.long sys_eventfd2
- .long sys_epoll_create2
+ .long sys_epoll_create1
.long sys_dup3 /* 330 */
.long sys_pipe2
.long sys_inotify_init1
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index 2fdad42..0c87474 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1046,7 +1046,7 @@ retry:
* RB tree. With the current implementation, the "size" parameter is ignored
* (besides sanity checks).
*/
-asmlinkage long sys_epoll_create2(int size, int flags)
+asmlinkage long sys_epoll_create1(int flags)
{
int error, fd = -1;
struct eventpoll *ep;
@@ -1058,14 +1058,13 @@ asmlinkage long sys_epoll_create2(int size, int flags)
return -EINVAL;
DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d)\n",
- current, size));
+ current, flags));
/*
- * Sanity check on the size parameter, and create the internal data
- * structure ( "struct eventpoll" ).
+ * Create the internal data structure ( "struct eventpoll" ).
*/
- error = -EINVAL;
- if (size <= 0 || (error = ep_alloc(&ep)) < 0) {
+ error = ep_alloc(&ep);
+ if (error < 0) {
fd = error;
goto error_return;
}
@@ -1081,14 +1080,17 @@ asmlinkage long sys_epoll_create2(int size, int flags)
error_return:
DNPRINTK(3, (KERN_INFO "[%p] eventpoll: sys_epoll_create(%d) = %d\n",
- current, size, fd));
+ current, flags, fd));
return fd;
}
asmlinkage long sys_epoll_create(int size)
{
- return sys_epoll_create2(size, 0);
+ if (size < 0)
+ return -EINVAL;
+
+ return sys_epoll_create1(0);
}
/*
diff --git a/include/asm-x86/unistd_32.h b/include/asm-x86/unistd_32.h
index b3daf50..d739467 100644
--- a/include/asm-x86/unistd_32.h
+++ b/include/asm-x86/unistd_32.h
@@ -334,7 +334,7 @@
#define __NR_timerfd_gettime 326
#define __NR_signalfd4 327
#define __NR_eventfd2 328
-#define __NR_epoll_create2 329
+#define __NR_epoll_create1 329
#define __NR_dup3 330
#define __NR_pipe2 331
#define __NR_inotify_init1 332
diff --git a/include/asm-x86/unistd_64.h b/include/asm-x86/unistd_64.h
index 5ef6778..4b88511 100644
--- a/include/asm-x86/unistd_64.h
+++ b/include/asm-x86/unistd_64.h
@@ -645,8 +645,8 @@ __SYSCALL(__NR_paccept, sys_paccept)
__SYSCALL(__NR_signalfd4, sys_signalfd4)
#define __NR_eventfd2 290
__SYSCALL(__NR_eventfd2, sys_eventfd2)
-#define __NR_epoll_create2 291
-__SYSCALL(__NR_epoll_create2, sys_epoll_create2)
+#define __NR_epoll_create1 291
+__SYSCALL(__NR_epoll_create1, sys_epoll_create1)
#define __NR_dup3 292
__SYSCALL(__NR_dup3, sys_dup3)
#define __NR_pipe2 293
diff --git a/include/linux/eventpoll.h b/include/linux/eventpoll.h
index 1cfaa40..f1e1d3c 100644
--- a/include/linux/eventpoll.h
+++ b/include/linux/eventpoll.h
@@ -18,7 +18,7 @@
#include <linux/fcntl.h>
#include <linux/types.h>
-/* Flags for epoll_create2. */
+/* Flags for epoll_create1. */
#define EPOLL_CLOEXEC O_CLOEXEC
/* Valid opcodes to issue to sys_epoll_ctl() */
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index aeb2df8..9d86572 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -431,7 +431,7 @@ asmlinkage long sys_poll(struct pollfd __user *ufds, unsigned int nfds,
asmlinkage long sys_select(int n, fd_set __user *inp, fd_set __user *outp,
fd_set __user *exp, struct timeval __user *tvp);
asmlinkage long sys_epoll_create(int size);
-asmlinkage long sys_epoll_create2(int size, int flags);
+asmlinkage long sys_epoll_create1(int flags);
asmlinkage long sys_epoll_ctl(int epfd, int op, int fd,
struct epoll_event __user *event);
asmlinkage long sys_epoll_wait(int epfd, struct epoll_event __user *events,
--
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