util: Emancipate id_wellformed() from QemuOpts

IDs have long spread beyond QemuOpts: not everything with an ID
necessarily goes through QemuOpts.  Commit 9aebf3b is about such a
case: block layer names are meant to be well-formed IDs, but some of
them don't go through QemuOpts, and thus weren't checked.  The commit
fixed that the straightforward way: rename the internal QemuOpts
helper id_wellformed() to qemu_opts_id_wellformed() and give it
external linkage.

Instead of using it directly in block.c, the commit adds wrapper
bdrv_is_valid_name(), probably to hide the connection to QemuOpts.

Go one logical step further: emancipate IDs from QemuOpts.  Rename the
function back to id_wellformed(), and put it in another file.  While
there, clean up its value to bool.  Peel off the bdrv_is_valid_name()
wrapper.

[Replaced stray return 0 with return false to match bool returns used
elsewhere in id_wellformed().
--Stefan]

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 1 insertions, 16 deletions

diff --git a/util/qemu-option.c b/util/qemu-option.c
index 0cf9960fc5..5d106959ca 100644
--- a/util/qemu-option.c
+++ b/util/qemu-option.c
@@ -641,28 +641,13 @@ QemuOpts *qemu_opts_find(QemuOptsList *list, const char *id)
     return NULL;
 }
 
-int qemu_opts_id_wellformed(const char *id)
-{
-    int i;
-
-    if (!qemu_isalpha(id[0])) {
-        return 0;
-    }
-    for (i = 1; id[i]; i++) {
-        if (!qemu_isalnum(id[i]) && !strchr("-._", id[i])) {
-            return 0;
-        }
-    }
-    return 1;
-}
-
 QemuOpts *qemu_opts_create(QemuOptsList *list, const char *id,
                            int fail_if_exists, Error **errp)
 {
     QemuOpts *opts = NULL;
 
     if (id) {
-        if (!qemu_opts_id_wellformed(id)) {
+        if (!id_wellformed(id)) {
             error_set(errp,QERR_INVALID_PARAMETER_VALUE, "id", "an identifier");
 #if 0 /* conversion from qerror_report() to error_set() broke this: */
             error_printf_unless_qmp("Identifiers consist of letters, digits, '-', '.', '_', starting with a letter.\n");