* Called under mdsc->mutex.
*/
static int __choose_mds(struct ceph_mds_client *mdsc,
- struct ceph_mds_request *req)
+ struct ceph_mds_request *req,
+ bool *random)
{
struct inode *inode;
struct ceph_inode_info *ci;
u32 hash = req->r_direct_hash;
bool is_hash = test_bit(CEPH_MDS_R_DIRECT_IS_HASH, &req->r_req_flags);
+ if (random)
+ *random = false;
+
/*
* is there a specific mds we should try? ignore hint if we have
* no session and the mds is not up (active or recovering).
return mds;
random:
+ if (random)
+ *random = true;
+
mds = ceph_mdsmap_get_random_mds(mdsc->mdsmap);
dout("choose_mds chose random mds%d\n", mds);
return mds;
struct ceph_mds_session *session = NULL;
int mds = -1;
int err = 0;
+ bool random;
if (req->r_err || test_bit(CEPH_MDS_R_GOT_RESULT, &req->r_req_flags)) {
if (test_bit(CEPH_MDS_R_ABORTED, &req->r_req_flags))
put_request_session(req);
- mds = __choose_mds(mdsc, req);
+ mds = __choose_mds(mdsc, req, &random);
if (mds < 0 ||
ceph_mdsmap_get_state(mdsc->mdsmap, mds) < CEPH_MDS_STATE_ACTIVE) {
dout("do_request no mds or not active, waiting for map\n");
goto out_session;
}
if (session->s_state == CEPH_MDS_SESSION_NEW ||
- session->s_state == CEPH_MDS_SESSION_CLOSING)
+ session->s_state == CEPH_MDS_SESSION_CLOSING) {
__open_session(mdsc, session);
+ /* retry the same mds later */
+ if (random)
+ req->r_resend_mds = mds;
+ }
list_add(&req->r_wait, &session->s_waiting);
goto out_session;
}
mutex_unlock(&mdsc->mutex);
goto out;
} else {
- int mds = __choose_mds(mdsc, req);
+ int mds = __choose_mds(mdsc, req, NULL);
if (mds >= 0 && mds != req->r_session->s_mds) {
dout("but auth changed, so resending\n");
__do_request(mdsc, req);