quorum: Use qapi_enum_parse() in quorum_open()

Signed-off-by: NMarc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170822132255.23945-12-marcandre.lureau@redhat.com>
Reviewed-by: NMarkus Armbruster <armbru@redhat.com>
[Rebased, qemu_opt_get() factored out, commit message tweaked]
Cc: Alberto Garcia <berto@igalia.com>
Reviewed-by: NAlberto Garcia <berto@igalia.com>
Signed-off-by: NMarkus Armbruster <armbru@redhat.com>
Message-Id: <1503564371-26090-9-git-send-email-armbru@redhat.com>

block/quorum.c

@@ -22,6 +22,7 @@
 #include "qapi/qmp/qjson.h"
 #include "qapi/qmp/qlist.h"
 #include "qapi/qmp/qstring.h"
+#include "qapi/util.h"
 #include "qapi-event.h"
 #include "crypto/hash.h"
 
@@ -867,30 +868,13 @@ static QemuOptsList quorum_runtime_opts = {
     },
 };
 
-static int parse_read_pattern(const char *opt)
-{
-    int i;
-
-    if (!opt) {
-        /* Set quorum as default */
-        return QUORUM_READ_PATTERN_QUORUM;
-    }
-
-    for (i = 0; i < QUORUM_READ_PATTERN__MAX; i++) {
-        if (!strcmp(opt, QuorumReadPattern_lookup[i])) {
-            return i;
-        }
-    }
-
-    return -EINVAL;
-}
-
 static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
                        Error **errp)
 {
     BDRVQuorumState *s = bs->opaque;
     Error *local_err = NULL;
     QemuOpts *opts = NULL;
+    const char *pattern_str;
     bool *opened;
     int i;
     int ret = 0;
@@ -925,7 +909,13 @@ static int quorum_open(BlockDriverState *bs, QDict *options, int flags,
         goto exit;
     }
 
-    ret = parse_read_pattern(qemu_opt_get(opts, QUORUM_OPT_READ_PATTERN));
+    pattern_str = qemu_opt_get(opts, QUORUM_OPT_READ_PATTERN);
+    if (!pattern_str) {
+        ret = QUORUM_READ_PATTERN_QUORUM;
+    } else {
+        ret = qapi_enum_parse(QuorumReadPattern_lookup, pattern_str,
+                              -EINVAL, NULL);
+    }
     if (ret < 0) {
         error_setg(&local_err, "Please set read-pattern as fifo or quorum");
         goto exit;