leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ceph: skip existing superblocks that are blocklisted or shut down when mounting

Browse Source 
Currently when mounting, we may end up finding an existing superblock
that corresponds to a blocklisted MDS client. This means that the new
mount ends up being unusable.

If we've found an existing superblock with a client that is already
blocklisted, and the client is not configured to recover on its own,
fail the match. Ditto if the superblock has been forcibly unmounted.

While we're in here, also rename "other" to the more conventional "fsc".

Cc: stable@vger.kernel.org
URL: https://bugzilla.redhat.com/show_bug.cgi?id=1901499
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Reviewed-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Jeff Layton 2021-09-30 08:33:13 -04:00 committed by Ilya Dryomov
parent 519d81956e
commit 98d0a6fb73
1 changed files with 14 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
fs/ceph/super.c
View File

@ -1002,16 +1002,16 @@ static int ceph_compare_super(struct super_block *sb, struct fs_context *fc)
struct ceph_fs_client *new = fc->s_fs_info;
struct ceph_mount_options *fsopt = new->mount_options;
struct ceph_options *opt = new->client->options;
struct ceph_fs_client *other = ceph_sb_to_client(sb);
struct ceph_fs_client *fsc = ceph_sb_to_client(sb);
dout("ceph_compare_super %p\n", sb);
if (compare_mount_options(fsopt, opt, other)) {
if (compare_mount_options(fsopt, opt, fsc)) {
dout("monitor(s)/mount options don't match\n");
return 0;
}
if ((opt->flags & CEPH_OPT_FSID) &&
ceph_fsid_compare(&opt->fsid, &other->client->fsid)) {
ceph_fsid_compare(&opt->fsid, &fsc->client->fsid)) {
dout("fsid doesn't match\n");
return 0;
}
@ -1019,6 +1019,17 @@ static int ceph_compare_super(struct super_block *sb, struct fs_context *fc)
dout("flags differ\n");
return 0;
}
if (fsc->blocklisted && !ceph_test_mount_opt(fsc, CLEANRECOVER)) {
dout("client is blocklisted (and CLEANRECOVER is not set)\n");
return 0;
}
if (fsc->mount_state == CEPH_MOUNT_SHUTDOWN) {
dout("client has been forcibly unmounted\n");
return 0;
}
return 1;
}