ceph: handle SESSION_FORCE_RO message
mark session as readonly and wake up all cap waiters.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index b93c631..d0618e8 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -2143,6 +2143,21 @@
ret = 1;
}
} else {
+ int session_readonly = false;
+ if ((need & CEPH_CAP_FILE_WR) && ci->i_auth_cap) {
+ struct ceph_mds_session *s = ci->i_auth_cap->session;
+ spin_lock(&s->s_cap_lock);
+ session_readonly = s->s_readonly;
+ spin_unlock(&s->s_cap_lock);
+ }
+ if (session_readonly) {
+ dout("get_cap_refs %p needed %s but mds%d readonly\n",
+ inode, ceph_cap_string(need), ci->i_auth_cap->mds);
+ *err = -EROFS;
+ ret = 1;
+ goto out_unlock;
+ }
+
dout("get_cap_refs %p have %s needed %s\n", inode,
ceph_cap_string(have), ceph_cap_string(need));
}