From: Hu Weiwen <sehuww@xxxxxxxxxxxxxxxx>
These are present in the device spec of cephfs. So they should be
treated as immutable. Also reject `mount()' calls where options and
device spec are inconsistent.
Signed-off-by: Hu Weiwen <sehuww@xxxxxxxxxxxxxxxx>
---
net/ceph/ceph_common.c | 26 +++++++++++++++++++++-----
1 file changed, 21 insertions(+), 5 deletions(-)
diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 4c6441536d55..c59c5ccc23a8 100644
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -440,17 +440,33 @@ int ceph_parse_param(struct fs_parameter *param, struct ceph_options *opt,
break;
case Opt_fsid:
- err = ceph_parse_fsid(param->string, &opt->fsid);
+ {
+ struct ceph_fsid fsid;
+
+ err = ceph_parse_fsid(param->string, &fsid);
if (err) {
error_plog(&log, "Failed to parse fsid: %d", err);
return err;
}
- opt->flags |= CEPH_OPT_FSID;
+
+ if (!(opt->flags & CEPH_OPT_FSID)) {
+ opt->fsid = fsid;
+ opt->flags |= CEPH_OPT_FSID;
+ } else if (ceph_fsid_compare(&opt->fsid, &fsid)) {
+ error_plog(&log, "fsid already set to %pU",
+ &opt->fsid);
+ return -EINVAL;
+ }
break;
+ }
case Opt_name:
- kfree(opt->name);
- opt->name = param->string;
- param->string = NULL;
+ if (!opt->name) {
+ opt->name = param->string;
+ param->string = NULL;
+ } else if (strcmp(opt->name, param->string)) {
+ error_plog(&log, "name already set to %s", opt->name);
+ return -EINVAL;
+ }
break;
case Opt_secret:
ceph_crypto_key_destroy(opt->key);
--
2.25.1
