On Tue, Oct 12, 2021 at 3:49 PM Jeff Layton <jlayton@xxxxxxxxxx> wrote: > > 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: Patrick Donnelly <pdonnell@xxxxxxxxxx> > Cc: Niels de Vos <ndevos@xxxxxxxxxx> > Cc: "Yan, Zheng" <ukernel@xxxxxxxxx> > Cc: stable@xxxxxxxxxxxxxxx > URL: https://bugzilla.redhat.com/show_bug.cgi?id=1901499 > Reviewed-by: Xiubo Li <xiubli@xxxxxxxxxx> > Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> > > ceph: when comparing superblocks, skip ones that have been forcibly unmounted > > Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx> Hi Jeff, This looks like a squashing left-over. > --- > fs/ceph/super.c | 17 ++++++++++++++--- > 1 file changed, 14 insertions(+), 3 deletions(-) > > v3: also handle the case where we have a forcibly unmounted superblock > that is detached but still extant > > diff --git a/fs/ceph/super.c b/fs/ceph/super.c > index f517ad9eeb26..b9ba50c9dc95 100644 > --- a/fs/ceph/super.c > +++ b/fs/ceph/super.c > @@ -1123,16 +1123,16 @@ 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; > } > @@ -1140,6 +1140,17 @@ static int ceph_compare_super(struct super_block *sb, struct fs_context *fc) > dout("flags differ\n"); > return 0; > } > + /* Exclude any blocklisted superblocks */ Nit: given the dout message that follows, this comment seems useless. Thanks, Ilya
