forked from Minki/linux
libceph: pool deletion detection
This adds the "map check" infrastructure for sending osdmap version checks on CALC_TARGET_POOL_DNE and completing in-flight requests with -ENOENT if the target pool doesn't exist or has just been deleted. Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Ilya Dryomov
parent
d0b19705e9
commit
4609245e26
@ -151,6 +151,7 @@ struct ceph_osd_request_target {
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struct ceph_osd_request {
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u64 r_tid; /* unique for this client */
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struct rb_node r_node;
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struct rb_node r_mc_node; /* map check */
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struct ceph_osd *r_osd;
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struct ceph_osd_request_target r_t;
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@ -191,6 +192,7 @@ struct ceph_osd_request {
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int r_attempts;
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struct ceph_eversion r_replay_version; /* aka reassert_version */
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u32 r_last_force_resend;
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u32 r_map_dne_bound;
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struct ceph_osd_req_op r_ops[];
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};
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@ -218,6 +220,7 @@ struct ceph_osd_linger_request {
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struct ceph_osd_request_target t;
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u32 last_force_resend;
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u32 map_dne_bound;
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struct timespec mtime;
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@ -225,6 +228,7 @@ struct ceph_osd_linger_request {
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struct mutex lock;
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struct rb_node node; /* osd */
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struct rb_node osdc_node; /* osdc */
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struct rb_node mc_node; /* map check */
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struct list_head scan_item;
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struct completion reg_commit_wait;
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@ -257,6 +261,8 @@ struct ceph_osd_client {
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atomic64_t last_tid; /* tid of last request */
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u64 last_linger_id;
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struct rb_root linger_requests; /* lingering requests */
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struct rb_root map_checks;
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struct rb_root linger_map_checks;
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atomic_t num_requests;
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atomic_t num_homeless;
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struct delayed_work timeout_work;
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@ -396,6 +396,7 @@ static void target_destroy(struct ceph_osd_request_target *t)
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static void request_release_checks(struct ceph_osd_request *req)
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{
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WARN_ON(!RB_EMPTY_NODE(&req->r_node));
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WARN_ON(!RB_EMPTY_NODE(&req->r_mc_node));
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WARN_ON(!list_empty(&req->r_unsafe_item));
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WARN_ON(req->r_osd);
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}
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@ -456,6 +457,7 @@ static void request_init(struct ceph_osd_request *req)
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init_completion(&req->r_completion);
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init_completion(&req->r_safe_completion);
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RB_CLEAR_NODE(&req->r_node);
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RB_CLEAR_NODE(&req->r_mc_node);
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INIT_LIST_HEAD(&req->r_unsafe_item);
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target_init(&req->r_t);
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@ -969,6 +971,7 @@ EXPORT_SYMBOL(ceph_osdc_new_request);
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* We keep osd requests in an rbtree, sorted by ->r_tid.
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*/
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DEFINE_RB_FUNCS(request, struct ceph_osd_request, r_tid, r_node)
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DEFINE_RB_FUNCS(request_mc, struct ceph_osd_request, r_tid, r_mc_node)
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static bool osd_homeless(struct ceph_osd *osd)
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{
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@ -1601,10 +1604,13 @@ static void maybe_request_map(struct ceph_osd_client *osdc)
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ceph_monc_renew_subs(&osdc->client->monc);
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}
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static void send_map_check(struct ceph_osd_request *req);
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static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
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{
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struct ceph_osd_client *osdc = req->r_osdc;
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struct ceph_osd *osd;
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enum calc_target_result ct_res;
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bool need_send = false;
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bool promoted = false;
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@ -1612,7 +1618,10 @@ static void __submit_request(struct ceph_osd_request *req, bool wrlocked)
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dout("%s req %p wrlocked %d\n", __func__, req, wrlocked);
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again:
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calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
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ct_res = calc_target(osdc, &req->r_t, &req->r_last_force_resend, false);
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if (ct_res == CALC_TARGET_POOL_DNE && !wrlocked)
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goto promote;
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osd = lookup_create_osd(osdc, req->r_t.osd, wrlocked);
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if (IS_ERR(osd)) {
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WARN_ON(PTR_ERR(osd) != -EAGAIN || wrlocked);
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@ -1656,6 +1665,9 @@ again:
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send_request(req);
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mutex_unlock(&osd->lock);
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if (ct_res == CALC_TARGET_POOL_DNE)
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send_map_check(req);
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if (promoted)
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downgrade_write(&osdc->lock);
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return;
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@ -1699,6 +1711,7 @@ static void __finish_request(struct ceph_osd_request *req)
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verify_osd_locked(osd);
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dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
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WARN_ON(lookup_request_mc(&osdc->map_checks, req->r_tid));
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unlink_request(osd, req);
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atomic_dec(&osdc->num_requests);
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@ -1726,13 +1739,127 @@ static void __complete_request(struct ceph_osd_request *req)
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complete_all(&req->r_completion);
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}
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/*
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* Note that this is open-coded in handle_reply(), which has to deal
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* with ack vs commit, dup acks, etc.
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*/
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static void complete_request(struct ceph_osd_request *req, int err)
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{
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dout("%s req %p tid %llu err %d\n", __func__, req, req->r_tid, err);
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req->r_result = err;
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__finish_request(req);
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__complete_request(req);
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complete_all(&req->r_safe_completion);
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ceph_osdc_put_request(req);
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}
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static void cancel_map_check(struct ceph_osd_request *req)
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{
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struct ceph_osd_client *osdc = req->r_osdc;
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struct ceph_osd_request *lookup_req;
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verify_osdc_wrlocked(osdc);
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lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
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if (!lookup_req)
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return;
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WARN_ON(lookup_req != req);
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erase_request_mc(&osdc->map_checks, req);
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ceph_osdc_put_request(req);
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}
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static void cancel_request(struct ceph_osd_request *req)
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{
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dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
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cancel_map_check(req);
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finish_request(req);
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}
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static void check_pool_dne(struct ceph_osd_request *req)
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{
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struct ceph_osd_client *osdc = req->r_osdc;
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struct ceph_osdmap *map = osdc->osdmap;
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verify_osdc_wrlocked(osdc);
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WARN_ON(!map->epoch);
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if (req->r_attempts) {
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/*
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* We sent a request earlier, which means that
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* previously the pool existed, and now it does not
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* (i.e., it was deleted).
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*/
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req->r_map_dne_bound = map->epoch;
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dout("%s req %p tid %llu pool disappeared\n", __func__, req,
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req->r_tid);
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} else {
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dout("%s req %p tid %llu map_dne_bound %u have %u\n", __func__,
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req, req->r_tid, req->r_map_dne_bound, map->epoch);
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}
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if (req->r_map_dne_bound) {
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if (map->epoch >= req->r_map_dne_bound) {
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/* we had a new enough map */
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pr_info_ratelimited("tid %llu pool does not exist\n",
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req->r_tid);
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complete_request(req, -ENOENT);
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}
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} else {
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send_map_check(req);
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}
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}
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static void map_check_cb(struct ceph_mon_generic_request *greq)
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{
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struct ceph_osd_client *osdc = &greq->monc->client->osdc;
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struct ceph_osd_request *req;
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u64 tid = greq->private_data;
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WARN_ON(greq->result || !greq->u.newest);
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down_write(&osdc->lock);
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req = lookup_request_mc(&osdc->map_checks, tid);
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if (!req) {
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dout("%s tid %llu dne\n", __func__, tid);
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goto out_unlock;
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}
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dout("%s req %p tid %llu map_dne_bound %u newest %llu\n", __func__,
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req, req->r_tid, req->r_map_dne_bound, greq->u.newest);
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if (!req->r_map_dne_bound)
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req->r_map_dne_bound = greq->u.newest;
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erase_request_mc(&osdc->map_checks, req);
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check_pool_dne(req);
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ceph_osdc_put_request(req);
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out_unlock:
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up_write(&osdc->lock);
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}
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static void send_map_check(struct ceph_osd_request *req)
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{
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struct ceph_osd_client *osdc = req->r_osdc;
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struct ceph_osd_request *lookup_req;
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int ret;
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verify_osdc_wrlocked(osdc);
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lookup_req = lookup_request_mc(&osdc->map_checks, req->r_tid);
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if (lookup_req) {
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WARN_ON(lookup_req != req);
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return;
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}
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ceph_osdc_get_request(req);
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insert_request_mc(&osdc->map_checks, req);
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ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
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map_check_cb, req->r_tid);
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WARN_ON(ret);
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}
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/*
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* lingering requests, watch/notify v2 infrastructure
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*/
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@ -1745,6 +1872,7 @@ static void linger_release(struct kref *kref)
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lreq->reg_req, lreq->ping_req);
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WARN_ON(!RB_EMPTY_NODE(&lreq->node));
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WARN_ON(!RB_EMPTY_NODE(&lreq->osdc_node));
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WARN_ON(!RB_EMPTY_NODE(&lreq->mc_node));
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WARN_ON(!list_empty(&lreq->scan_item));
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WARN_ON(!list_empty(&lreq->pending_lworks));
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WARN_ON(lreq->osd);
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@ -1783,6 +1911,7 @@ linger_alloc(struct ceph_osd_client *osdc)
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mutex_init(&lreq->lock);
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RB_CLEAR_NODE(&lreq->node);
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RB_CLEAR_NODE(&lreq->osdc_node);
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RB_CLEAR_NODE(&lreq->mc_node);
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INIT_LIST_HEAD(&lreq->scan_item);
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INIT_LIST_HEAD(&lreq->pending_lworks);
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init_completion(&lreq->reg_commit_wait);
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@ -1797,6 +1926,7 @@ linger_alloc(struct ceph_osd_client *osdc)
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DEFINE_RB_INSDEL_FUNCS(linger, struct ceph_osd_linger_request, linger_id, node)
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DEFINE_RB_FUNCS(linger_osdc, struct ceph_osd_linger_request, linger_id, osdc_node)
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DEFINE_RB_FUNCS(linger_mc, struct ceph_osd_linger_request, linger_id, mc_node)
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/*
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* Create linger request <-> OSD session relation.
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@ -2193,6 +2323,23 @@ static void linger_submit(struct ceph_osd_linger_request *lreq)
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send_linger(lreq);
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}
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static void cancel_linger_map_check(struct ceph_osd_linger_request *lreq)
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{
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struct ceph_osd_client *osdc = lreq->osdc;
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struct ceph_osd_linger_request *lookup_lreq;
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verify_osdc_wrlocked(osdc);
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lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
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lreq->linger_id);
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if (!lookup_lreq)
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return;
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WARN_ON(lookup_lreq != lreq);
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erase_linger_mc(&osdc->linger_map_checks, lreq);
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linger_put(lreq);
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}
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/*
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* @lreq has to be both registered and linked.
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*/
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@ -2202,6 +2349,7 @@ static void __linger_cancel(struct ceph_osd_linger_request *lreq)
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cancel_linger_request(lreq->ping_req);
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if (lreq->reg_req->r_osd)
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cancel_linger_request(lreq->reg_req);
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cancel_linger_map_check(lreq);
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unlink_linger(lreq->osd, lreq);
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linger_unregister(lreq);
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}
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@ -2216,6 +2364,89 @@ static void linger_cancel(struct ceph_osd_linger_request *lreq)
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up_write(&osdc->lock);
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}
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static void send_linger_map_check(struct ceph_osd_linger_request *lreq);
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static void check_linger_pool_dne(struct ceph_osd_linger_request *lreq)
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{
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struct ceph_osd_client *osdc = lreq->osdc;
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struct ceph_osdmap *map = osdc->osdmap;
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verify_osdc_wrlocked(osdc);
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WARN_ON(!map->epoch);
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if (lreq->register_gen) {
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lreq->map_dne_bound = map->epoch;
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dout("%s lreq %p linger_id %llu pool disappeared\n", __func__,
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lreq, lreq->linger_id);
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} else {
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dout("%s lreq %p linger_id %llu map_dne_bound %u have %u\n",
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__func__, lreq, lreq->linger_id, lreq->map_dne_bound,
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map->epoch);
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}
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if (lreq->map_dne_bound) {
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if (map->epoch >= lreq->map_dne_bound) {
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/* we had a new enough map */
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pr_info("linger_id %llu pool does not exist\n",
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lreq->linger_id);
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linger_reg_commit_complete(lreq, -ENOENT);
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__linger_cancel(lreq);
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}
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} else {
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send_linger_map_check(lreq);
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}
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}
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static void linger_map_check_cb(struct ceph_mon_generic_request *greq)
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{
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struct ceph_osd_client *osdc = &greq->monc->client->osdc;
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struct ceph_osd_linger_request *lreq;
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u64 linger_id = greq->private_data;
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WARN_ON(greq->result || !greq->u.newest);
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down_write(&osdc->lock);
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lreq = lookup_linger_mc(&osdc->linger_map_checks, linger_id);
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if (!lreq) {
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dout("%s linger_id %llu dne\n", __func__, linger_id);
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goto out_unlock;
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}
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dout("%s lreq %p linger_id %llu map_dne_bound %u newest %llu\n",
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__func__, lreq, lreq->linger_id, lreq->map_dne_bound,
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greq->u.newest);
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if (!lreq->map_dne_bound)
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lreq->map_dne_bound = greq->u.newest;
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erase_linger_mc(&osdc->linger_map_checks, lreq);
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check_linger_pool_dne(lreq);
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linger_put(lreq);
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out_unlock:
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up_write(&osdc->lock);
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}
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static void send_linger_map_check(struct ceph_osd_linger_request *lreq)
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{
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struct ceph_osd_client *osdc = lreq->osdc;
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struct ceph_osd_linger_request *lookup_lreq;
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int ret;
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verify_osdc_wrlocked(osdc);
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lookup_lreq = lookup_linger_mc(&osdc->linger_map_checks,
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lreq->linger_id);
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if (lookup_lreq) {
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WARN_ON(lookup_lreq != lreq);
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return;
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}
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linger_get(lreq);
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insert_linger_mc(&osdc->linger_map_checks, lreq);
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ret = ceph_monc_get_version_async(&osdc->client->monc, "osdmap",
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linger_map_check_cb, lreq->linger_id);
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WARN_ON(ret);
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}
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static int linger_reg_commit_wait(struct ceph_osd_linger_request *lreq)
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{
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int ret;
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@ -2677,10 +2908,7 @@ static void handle_reply(struct ceph_osd *osd, struct ceph_msg *msg)
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return;
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fail_request:
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req->r_result = -EIO;
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__finish_request(req);
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__complete_request(req);
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complete_all(&req->r_safe_completion);
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complete_request(req, -EIO);
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out_unlock_session:
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mutex_unlock(&osd->lock);
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out_unlock_osdc:
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@ -2764,6 +2992,7 @@ static void scan_requests(struct ceph_osd *osd,
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/* fall through */
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case CALC_TARGET_NEED_RESEND:
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cancel_linger_map_check(lreq);
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/*
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* scan_requests() for the previous epoch(s)
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* may have already added it to the list, since
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@ -2773,6 +3002,7 @@ static void scan_requests(struct ceph_osd *osd,
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list_add_tail(&lreq->scan_item, need_resend_linger);
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break;
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case CALC_TARGET_POOL_DNE:
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check_linger_pool_dne(lreq);
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break;
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}
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}
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@ -2782,7 +3012,7 @@ static void scan_requests(struct ceph_osd *osd,
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rb_entry(n, struct ceph_osd_request, r_node);
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enum calc_target_result ct_res;
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n = rb_next(n); /* unlink_request() */
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n = rb_next(n); /* unlink_request(), check_pool_dne() */
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dout("%s req %p tid %llu\n", __func__, req, req->r_tid);
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ct_res = calc_target(osdc, &req->r_t,
|
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@ -2799,10 +3029,12 @@ static void scan_requests(struct ceph_osd *osd,
|
||||
|
||||
/* fall through */
|
||||
case CALC_TARGET_NEED_RESEND:
|
||||
cancel_map_check(req);
|
||||
unlink_request(osd, req);
|
||||
insert_request(need_resend, req);
|
||||
break;
|
||||
case CALC_TARGET_POOL_DNE:
|
||||
check_pool_dne(req);
|
||||
break;
|
||||
}
|
||||
}
|
||||
@ -3655,6 +3887,8 @@ int ceph_osdc_init(struct ceph_osd_client *osdc, struct ceph_client *client)
|
||||
osdc->homeless_osd.o_osdc = osdc;
|
||||
osdc->homeless_osd.o_osd = CEPH_HOMELESS_OSD;
|
||||
osdc->linger_requests = RB_ROOT;
|
||||
osdc->map_checks = RB_ROOT;
|
||||
osdc->linger_map_checks = RB_ROOT;
|
||||
INIT_DELAYED_WORK(&osdc->timeout_work, handle_timeout);
|
||||
INIT_DELAYED_WORK(&osdc->osds_timeout_work, handle_osds_timeout);
|
||||
|
||||
@ -3720,6 +3954,8 @@ void ceph_osdc_stop(struct ceph_osd_client *osdc)
|
||||
|
||||
WARN_ON(!list_empty(&osdc->osd_lru));
|
||||
WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_requests));
|
||||
WARN_ON(!RB_EMPTY_ROOT(&osdc->map_checks));
|
||||
WARN_ON(!RB_EMPTY_ROOT(&osdc->linger_map_checks));
|
||||
WARN_ON(atomic_read(&osdc->num_requests));
|
||||
WARN_ON(atomic_read(&osdc->num_homeless));
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user