volume_id: also add readable check to probe_all()

Otherwise probe_all will run two times into a timout, one
for the raid, and one for the filesystem probe. Thanks to
Tore Anderson for the debugging.

diff --git a/extras/volume_id/lib/volume_id.c b/extras/volume_id/lib/volume_id.c
index b82de2344de33cb6624e993577cb009b0462dc1f..9edbb69fb9418ba0a302ea453147c6a9df87c0e1 100644 (file)
--- a/extras/volume_id/lib/volume_id.c
+++ b/extras/volume_id/lib/volume_id.c
@@ -330,6 +330,14 @@ err:
        return 0;
 }
 
+/* run only once into a timeout for unreadable devices */
+static int device_is_readable(struct volume_id *id)
+{
+       if (volume_id_get_buffer(id, 0x00, 0x200) != NULL)
+               return 1;
+       return 0;
+}
+
 /**
  * volume_id_probe_raid:
  * @id: Probing context.
@@ -347,8 +355,7 @@ int volume_id_probe_raid(struct volume_id *id, uint64_t off, uint64_t size)
        if (id == NULL)
                return -EINVAL;
 
-       /* run only once into a timeout for unreadable devices */
-       if (volume_id_get_buffer(id, 0x00, 0x200) == NULL)
+       if (!device_is_readable(id))
                return -1;
 
        info("probing at offset 0x%llx, size 0x%llx",
@@ -382,8 +389,7 @@ int volume_id_probe_filesystem(struct volume_id *id, uint64_t off, uint64_t size
        if (id == NULL)
                return -EINVAL;
 
-       /* run only once into a timeout for unreadable devices */
-       if (volume_id_get_buffer(id, 0x00, 0x200) == NULL)
+       if (!device_is_readable(id))
                return -1;
 
        info("probing at offset 0x%llx, size 0x%llx",
@@ -415,6 +421,9 @@ int volume_id_probe_all(struct volume_id *id, uint64_t off, uint64_t size)
        if (id == NULL)
                return -EINVAL;
 
+       if (!device_is_readable(id))
+               return -1;
+
        /* probe for raid first, because fs probes may be successful on raid members */
        if (volume_id_probe_raid(id, off, size) == 0)
                return 0;