Signed-off-by: Benoit Canet <ben...@irqsave.net>
---
block/quorum.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 62 insertions(+)
diff --git a/block/quorum.c b/block/quorum.c
index e0405b6..de58ab8 100644
--- a/block/quorum.c
+++ b/block/quorum.c
@@ -47,11 +47,73 @@ struct QuorumAIOCB {
int vote_ret;
};
+/* Valid quorum filenames look like
+ * quorum:path/to/a_image:path/to/b_image:path/to/c_image
+ */
+static int quorum_open(BlockDriverState *bs, const char *filename, int flags)
+{
+ BDRVQuorumState *s = bs->opaque;
+ int ret, i;
+ char *a, *b, *c, *filenames[3];
+
+ /* Parse the quorum: prefix */
+ if (strncmp(filename, "quorum:", strlen("quorum:"))) {
+ return -EINVAL;
+ }
+ a = g_strdup(filename + strlen("quorum:"));
+
+ /* Find separators */
+ b = strchr(a, ':');
+ if (b == NULL) {
+ return -EINVAL;
+ }
+
+ c = strrchr(a, ':');
+ if (c == NULL) {
+ return -EINVAL;
+ }
+
+ /* Check that filename contains two separate ':' */
+ if (b == c) {
+ return -EINVAL;
+ }
+
+ /* Split string */
+ *b = '\0';
+ *c = '\0';
+
+ filenames[0] = a;
+ filenames[1] = b + 1;
+ filenames[2] = c + 1;
+
+ /* Open files */
+ for (i = 0; i <= 2; i++) {
+ s->bs[i] = bdrv_new("");
+ ret = bdrv_open(s->bs[i], filenames[i], flags, NULL);
+ if (ret < 0) {
+ goto error_exit;
+ }
+ }
+
+ goto clean_exit;
+
+error_exit:
+ for (; i >= 0; i--) {
+ bdrv_delete(s->bs[i]);
+ s->bs[i] = NULL;
+ }
+clean_exit:
+ g_free(a);
+ return ret;
+}
+
static BlockDriver bdrv_quorum = {
.format_name = "quorum",
.protocol_name = "quorum",
.instance_size = sizeof(BDRVQuorumState),
+
+ .bdrv_file_open = quorum_open,
};
static void bdrv_quorum_init(void)
--
1.7.9.5
