diff mbox series

[v6,5/8] util: add Error object for qemu_open_internal error reporting

Message ID 20200903152210.1917355-6-berrange@redhat.com
State Superseded
Headers show
Series block: improve error reporting for unsupported O_DIRECT | expand

Commit Message

Daniel P. Berrangé Sept. 3, 2020, 3:22 p.m. UTC 
Instead of relying on the limited information from errno, we can now
also provide detailed error messages to callers that ask for it.

Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
---
 util/osdep.c | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)
diff mbox series

Patch

diff --git a/util/osdep.c b/util/osdep.c
index 11531e8f59..28aa89adc9 100644
--- a/util/osdep.c
+++ b/util/osdep.c
@@ -22,6 +22,7 @@ 
  * THE SOFTWARE.
  */
 #include "qemu/osdep.h"
+#include "qapi/error.h"
 
 /* Needed early for CONFIG_BSD etc. */
 
@@ -297,7 +298,7 @@  static int qemu_open_cloexec(const char *name, int flags, mode_t mode)
  * Opens a file with FD_CLOEXEC set
  */
 static int
-qemu_open_internal(const char *name, int flags, mode_t mode)
+qemu_open_internal(const char *name, int flags, mode_t mode, Error **errp)
 {
     int ret;
 
@@ -311,12 +312,15 @@  qemu_open_internal(const char *name, int flags, mode_t mode)
 
         fdset_id = qemu_parse_fdset(fdset_id_str);
         if (fdset_id == -1) {
+            error_setg(errp, "Could not parse fdset %s", name);
             errno = EINVAL;
             return -1;
         }
 
         dupfd = monitor_fdset_dup_fd_add(fdset_id, flags);
         if (dupfd == -1) {
+            error_setg_errno(errp, errno, "Could not dup FD for %s flags %x",
+                             name, flags);
             return -1;
         }
 
@@ -326,6 +330,13 @@  qemu_open_internal(const char *name, int flags, mode_t mode)
 
     ret = qemu_open_cloexec(name, flags, mode);
 
+    if (ret == -1) {
+        const char *action = flags & O_CREAT ? "create" : "open";
+        error_setg_errno(errp, errno, "Could not %s '%s'",
+                         action, name);
+    }
+
+
     return ret;
 }
 
@@ -342,7 +353,7 @@  int qemu_open_old(const char *name, int flags, ...)
     }
     va_end(ap);
 
-    ret = qemu_open_internal(name, flags, mode);
+    ret = qemu_open_internal(name, flags, mode, NULL);
 
 #ifdef O_DIRECT
     if (ret == -1 && errno == EINVAL && (flags & O_DIRECT)) {