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[Qemu-devel] [PATCH] linux-user: Implement sendfile and sendfile64
From: |
Peter Maydell |
Subject: |
[Qemu-devel] [PATCH] linux-user: Implement sendfile and sendfile64 |
Date: |
Fri, 8 Feb 2013 17:31:55 +0000 |
Implement the sendfile and sendfile64 syscalls. This implementation
passes all the LTP test cases for these syscalls.
Signed-off-by: Peter Maydell <address@hidden>
---
This test-driven-development thing is fun :-)
configure | 17 ++++++++++++++++
linux-user/syscall.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 70 insertions(+)
diff --git a/configure b/configure
index 8789324..fd64e82 100755
--- a/configure
+++ b/configure
@@ -2715,6 +2715,20 @@ if compile_prog "" "" ; then
epoll_pwait=yes
fi
+# check for sendfile support
+sendfile=no
+cat > $TMPC << EOF
+#include <sys/sendfile.h>
+
+int main(void)
+{
+ return sendfile(0, 0, 0, 0);
+}
+EOF
+if compile_prog "" "" ; then
+ sendfile=yes
+fi
+
# Check if tools are available to build documentation.
if test "$docs" != "no" ; then
if has makeinfo && has pod2man; then
@@ -3551,6 +3565,9 @@ fi
if test "$epoll_pwait" = "yes" ; then
echo "CONFIG_EPOLL_PWAIT=y" >> $config_host_mak
fi
+if test "$sendfile" = "yes" ; then
+ echo "CONFIG_SENDFILE=y" >> $config_host_mak
+fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index fcdccfa..35df073 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -78,6 +78,9 @@ int __clone2(int (*fn)(void *), void *child_stack_base,
#ifdef CONFIG_ATTR
#include "qemu/xattr.h"
#endif
+#ifdef CONFIG_SENDFILE
+#include <sys/sendfile.h>
+#endif
#define termios host_termios
#define winsize host_winsize
@@ -7551,8 +7554,58 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
#else
goto unimplemented;
#endif
+
+#ifdef CONFIG_SENDFILE
+ case TARGET_NR_sendfile:
+ {
+ off_t *offp = NULL;
+ off_t off;
+ if (arg3) {
+ ret = get_user_sal(off, arg3);
+ if (is_error(ret)) {
+ break;
+ }
+ offp = &off;
+ }
+ ret = get_errno(sendfile(arg1, arg2, offp, arg4));
+ if (!is_error(ret) && arg3) {
+ abi_long ret2 = put_user_sal(off, arg3);
+ if (is_error(ret2)) {
+ ret = ret2;
+ }
+ }
+ break;
+ }
+#ifdef TARGET_NR_sendfile64
+ case TARGET_NR_sendfile64:
+ {
+ off_t *offp = NULL;
+ off_t off;
+ if (arg3) {
+ ret = get_user_s64(off, arg3);
+ if (is_error(ret)) {
+ break;
+ }
+ offp = &off;
+ }
+ ret = get_errno(sendfile(arg1, arg2, offp, arg4));
+ if (!is_error(ret) && arg3) {
+ abi_long ret2 = put_user_s64(off, arg3);
+ if (is_error(ret2)) {
+ ret = ret2;
+ }
+ }
+ break;
+ }
+#endif
+#else
case TARGET_NR_sendfile:
+#ifdef TARGET_NR_sendfile64:
+ case TARGET_NR_sendfile64:
+#endif
goto unimplemented;
+#endif
+
#ifdef TARGET_NR_getpmsg
case TARGET_NR_getpmsg:
goto unimplemented;
--
1.7.9.5
- [Qemu-devel] [PATCH] linux-user: Implement sendfile and sendfile64,
Peter Maydell <=