[PATCH 11/16] qga: replace qemu_open_old() with qemu_open_cloexec()

[marcandre.lureau@redhat.com]

From: Marc-André Lureau <marcandre.lureau@redhat.com>

qemu_open_old() uses qemu_open_internal() which handles special
"/dev/fdset/" path for monitor fd sets, set CLOEXEC, and uses Error
reporting (and some O_DIRECT special error casing).

The monitor fdset handling is unnecessary for qga, use
qemu_open_cloexec() instead.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
---
 qga/channel-posix.c  | 18 ++++++++++++------
 qga/commands-posix.c | 23 +++++++++++------------
 2 files changed, 23 insertions(+), 18 deletions(-)

diff --git a/qga/channel-posix.c b/qga/channel-posix.c
index a996858e2492..7752114e214d 100644
--- a/qga/channel-posix.c
+++ b/qga/channel-posix.c
@@ -1,4 +1,5 @@
 #include "qemu/osdep.h"
+#include "qemu/cutils.h"
 #include <termios.h>
 #include "qapi/error.h"
 #include "qemu/sockets.h"
@@ -121,19 +122,24 @@ static int ga_channel_client_add(GAChannel *c, int fd)
 static gboolean ga_channel_open(GAChannel *c, const gchar *path,
                                 GAChannelMethod method, int fd)
 {
+    g_autoptr(Error) err = NULL;
     int ret;
     c->method = method;
 
     switch (c->method) {
     case GA_CHANNEL_VIRTIO_SERIAL: {
         assert(fd < 0);
-        fd = qemu_open_old(path, O_RDWR | O_NONBLOCK
+        fd = qemu_open_cloexec(
+            path,
 #ifndef CONFIG_SOLARIS
-                           | O_ASYNC
+            O_ASYNC |
 #endif
-                           );
+            O_RDWR | O_NONBLOCK,
+            0,
+            &err
+        );
         if (fd == -1) {
-            g_critical("error opening channel: %s", strerror(errno));
+            g_critical("error opening channel: %s", error_get_pretty(err));
             return false;
         }
 #ifdef CONFIG_SOLARIS
@@ -157,9 +163,9 @@ static gboolean ga_channel_open(GAChannel *c, const gchar *path,
         struct termios tio;
 
         assert(fd < 0);
-        fd = qemu_open_old(path, O_RDWR | O_NOCTTY | O_NONBLOCK);
+        fd = qemu_open_cloexec(path, O_RDWR | O_NOCTTY | O_NONBLOCK, 0, &err);
         if (fd == -1) {
-            g_critical("error opening channel: %s", strerror(errno));
+            g_critical("error opening channel: %s", error_get_pretty(err));
             return false;
         }
         tcgetattr(fd, &tio);
diff --git a/qga/commands-posix.c b/qga/commands-posix.c
index 974bcbee7e97..70036b789e6f 100644
--- a/qga/commands-posix.c
+++ b/qga/commands-posix.c
@@ -1394,6 +1394,7 @@ static GuestDiskInfoList *get_disk_partitions(
 
 static void get_nvme_smart(GuestDiskInfo *disk)
 {
+    g_autoptr(Error) err = NULL;
     int fd;
     GuestNVMeSmart *smart;
     NvmeSmartLog log = {0};
@@ -1406,9 +1407,9 @@ static void get_nvme_smart(GuestDiskInfo *disk)
                  | (((sizeof(log) >> 2) - 1) << 16)
     };
 
-    fd = qemu_open_old(disk->name, O_RDONLY);
+    fd = qemu_open_cloexec(disk->name, O_RDONLY, 0, &err);
     if (fd == -1) {
-        g_debug("Failed to open device: %s: %s", disk->name, g_strerror(errno));
+        g_debug("Failed to open device: %s: %s", disk->name, error_get_pretty(err));
         return;
     }
 
@@ -1739,9 +1740,8 @@ int64_t qmp_guest_fsfreeze_freeze_list(bool has_mountpoints,
             }
         }
 
-        fd = qemu_open_old(mount->dirname, O_RDONLY);
+        fd = qemu_open_cloexec(mount->dirname, O_RDONLY, 0, errp);
         if (fd == -1) {
-            error_setg_errno(errp, errno, "failed to open %s", mount->dirname);
             goto error;
         }
 
@@ -1806,7 +1806,7 @@ int64_t qmp_guest_fsfreeze_thaw(Error **errp)
 
     QTAILQ_FOREACH(mount, &mounts, next) {
         logged = false;
-        fd = qemu_open_old(mount->dirname, O_RDONLY);
+        fd = qemu_open_cloexec(mount->dirname, O_RDONLY, 0, NULL);
         if (fd == -1) {
             continue;
         }
@@ -1866,21 +1866,20 @@ static void guest_fsfreeze_cleanup(void)
 GuestFilesystemTrimResponse *
 qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
 {
+    ERRP_GUARD();
     GuestFilesystemTrimResponse *response;
     GuestFilesystemTrimResult *result;
     int ret = 0;
     FsMountList mounts;
     struct FsMount *mount;
     int fd;
-    Error *local_err = NULL;
     struct fstrim_range r;
 
     slog("guest-fstrim called");
 
     QTAILQ_INIT(&mounts);
-    build_fs_mount_list(&mounts, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
+    build_fs_mount_list(&mounts, errp);
+    if (*errp) {
         return NULL;
     }
 
@@ -1892,11 +1891,11 @@ qmp_guest_fstrim(bool has_minimum, int64_t minimum, Error **errp)
 
         QAPI_LIST_PREPEND(response->paths, result);
 
-        fd = qemu_open_old(mount->dirname, O_RDONLY);
+        fd = qemu_open_cloexec(mount->dirname, O_RDONLY, 0, errp);
         if (fd == -1) {
-            result->error = g_strdup_printf("failed to open: %s",
-                                            strerror(errno));
+            result->error = g_strdup(error_get_pretty(*errp));
             result->has_error = true;
+            g_clear_pointer(errp, error_free);
             continue;
         }
 
-- 
2.36.0.44.g0f828332d5ac