From: Aleksandar Markovic <aleksandar.marko...@imgtec.com>
This patch implements Qemu user mode syncfs() syscall support. Syscall
syncfs() syncs the filesystem containing file determined by the open
file descriptor passed as the argument to syncfs().
The implementation consists of a straightforward invocation of host's
syncfs(). Configure and strace support is included as well.
Signed-off-by: Aleksandar Markovic <aleksandar.marko...@imgtec.com>
Signed-off-by: Riku Voipio <riku.voi...@linaro.org>
---
configure | 18 ++++++++++++++++++
linux-user/strace.list | 2 +-
linux-user/syscall.c | 5 +++++
3 files changed, 24 insertions(+), 1 deletion(-)
diff --git a/configure b/configure
index 1ce3d00..d3dafcb 100755
--- a/configure
+++ b/configure
@@ -3926,6 +3926,21 @@ if compile_prog "" "" ; then
clock_adjtime=yes
fi
+# syncfs probe
+syncfs=no
+cat > $TMPC <<EOF
+#include <unistd.h>
+
+int main(void)
+{
+ return syncfs(0);
+}
+EOF
+syncfs=no
+if compile_prog "" "" ; then
+ syncfs=yes
+fi
+
# Check if tools are available to build documentation.
if test "$docs" != "no" ; then
if has makeinfo && has pod2man; then
@@ -5214,6 +5229,9 @@ fi
if test "$clock_adjtime" = "yes" ; then
echo "CONFIG_CLOCK_ADJTIME=y" >> $config_host_mak
fi
+if test "$syncfs" = "yes" ; then
+ echo "CONFIG_SYNCFS=y" >> $config_host_mak
+fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi
diff --git a/linux-user/strace.list b/linux-user/strace.list
index dcd3812..3b1282e 100644
--- a/linux-user/strace.list
+++ b/linux-user/strace.list
@@ -1459,7 +1459,7 @@
{ TARGET_NR_sync, "sync" , NULL, NULL, NULL },
#endif
#ifdef TARGET_NR_syncfs
-{ TARGET_NR_syncfs, "syncfs" , NULL, NULL, NULL },
+{ TARGET_NR_syncfs, "syncfs" , "%s(%d)", NULL, NULL },
#endif
#ifdef TARGET_NR_syscall
{ TARGET_NR_syscall, "syscall" , NULL, NULL, NULL },
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 13513af..a91383f 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -8091,6 +8091,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
sync();
ret = 0;
break;
+#if defined(TARGET_NR_syncfs) && defined(CONFIG_SYNCFS)
+ case TARGET_NR_syncfs:
+ ret = get_errno(syncfs(arg1));
+ break;
+#endif
case TARGET_NR_kill:
ret = get_errno(safe_kill(arg1, target_to_host_signal(arg2)));
break;
--
2.1.4
