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block/rbd: enable filename option and parsing 

When enabling option parsing and blockdev-add for rbd, we removed the
'filename' option.  Unfortunately, this was a bit optimistic, as
previous versions of QEMU allowed the use of the option in backing
filenames via json.  This means that without parsing this option, we
cannot open existing images that used to work fine.

See bug: https://bugzilla.redhat.com/show_bug.cgi?id=1457088

Tested-by: Richard W.M. Jones <rjones@redhat.com>
Signed-off-by: Jeff Cody <jcody@redhat.com>
Message-id: 937dc9fde348d13311eb8e23444df3bc3190b612.1497444637.git.jcody@redhat.com
Signed-off-by: Jeff Cody <jcody@redhat.com>
This commit is contained in:
Jeff Cody 2017-06-14 08:53:19 -04:00
parent 3f0602927b
commit 91589d9e5c
1 changed files with 21 additions and 1 deletions
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22
block/rbd.c
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@ -340,6 +340,10 @@ static QemuOptsList runtime_opts = {
.type = QEMU_OPT_STRING,
.help = "Legacy rados key/value option parameters",
},
{
.name = "filename",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
@ -541,12 +545,27 @@ static int qemu_rbd_open(BlockDriverState *bs, QDict *options, int flags,
{
BDRVRBDState *s = bs->opaque;
const char *pool, *snap, *conf, *user, *image_name, *keypairs;
const char *secretid;
const char *secretid, *filename;
QemuOpts *opts;
Error *local_err = NULL;
char *mon_host = NULL;
int r;
/* If we are given a filename, parse the filename, with precedence given to
* filename encoded options */
filename = qdict_get_try_str(options, "filename");
if (filename) {
error_report("Warning: 'filename' option specified. "
"This is an unsupported option, and may be deprecated "
"in the future");
qemu_rbd_parse_filename(filename, options, &local_err);
if (local_err) {
r = -EINVAL;
error_propagate(errp, local_err);
goto exit;
}
}
opts = qemu_opts_create(&runtime_opts, NULL, 0, &error_abort);
qemu_opts_absorb_qdict(opts, options, &local_err);
if (local_err) {
@ -665,6 +684,7 @@ failed_shutdown:
failed_opts:
qemu_opts_del(opts);
g_free(mon_host);
exit:
return r;
}