diff mbox

[PULL,v2,15/22] linux-user: Add support for syncfs() syscall

Message ID 2130e4a18f76ae5bbf6836b6f6c2f40e8cc51437.1476796525.git.riku.voipio@linaro.org
State Accepted
Commit 5a03cd009ae8d9c819c3f24f16695f8a334b8ad9
Headers show

Commit Message

Riku Voipio Oct. 18, 2016, 1:21 p.m. UTC 
From: Aleksandar Markovic <aleksandar.markovic@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.markovic@imgtec.com>

Signed-off-by: Riku Voipio <riku.voipio@linaro.org>

---
 configure              | 18 ++++++++++++++++++
 linux-user/strace.list |  2 +-
 linux-user/syscall.c   |  5 +++++
 3 files changed, 24 insertions(+), 1 deletion(-)

-- 
2.1.4
diff mbox

Patch

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 28d2b8e..d85a0b5 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;