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23 * Copyright (c) 2011, 2012 Commissariat a l'energie atomique et aux energies
26 * Copyright (c) 2013, 2017, Intel Corporation.
27 * Use is subject to license terms.
30 * lustre/mdt/mdt_coordinator.c
32 * Lustre HSM Coordinator
34 * Author: Jacques-Charles Lafoucriere <jacques-charles.lafoucriere@cea.fr>
35 * Author: Aurelien Degremont <aurelien.degremont@cea.fr>
36 * Author: Thomas Leibovici <thomas.leibovici@cea.fr>
39 #define DEBUG_SUBSYSTEM S_MDS
41 #include <linux/kthread.h>
42 #include <obd_support.h>
43 #include <lustre_export.h>
45 #include <lprocfs_status.h>
46 #include <lustre_log.h>
47 #include <lustre_kernelcomm.h>
48 #include "mdt_internal.h"
50 static struct lprocfs_vars lprocfs_mdt_hsm_vars[];
53 * get obj and HSM attributes on a fid
54 * \param mti [IN] context
55 * \param fid [IN] object fid
56 * \param hsm [OUT] HSM meta data
57 * \retval obj or error (-ENOENT if not found)
59 struct mdt_object *mdt_hsm_get_md_hsm(struct mdt_thread_info *mti,
60 const struct lu_fid *fid,
64 struct mdt_object *obj;
72 /* find object by FID */
73 obj = mdt_object_find(mti->mti_env, mti->mti_mdt, fid);
77 if (!mdt_object_exists(obj)) {
79 mdt_object_put(mti->mti_env, obj);
80 RETURN(ERR_PTR(-ENOENT));
83 rc = mdt_attr_get_complex(mti, obj, ma);
85 mdt_object_put(mti->mti_env, obj);
89 if (ma->ma_valid & MA_HSM)
92 memset(hsm, 0, sizeof(*hsm));
97 void mdt_hsm_dump_hal(int level, const char *prefix,
98 struct hsm_action_list *hal)
101 struct hsm_action_item *hai;
104 CDEBUG(level, "%s: HAL header: version %X count %d"
105 " archive_id %d flags %#llx\n",
106 prefix, hal->hal_version, hal->hal_count,
107 hal->hal_archive_id, hal->hal_flags);
109 hai = hai_first(hal);
110 for (i = 0; i < hal->hal_count; i++) {
111 sz = hai->hai_len - sizeof(*hai);
112 CDEBUG(level, "%s %d: fid="DFID" dfid="DFID
114 " action=%s extent=%#llx-%#llx gid=%#llx"
115 " datalen=%d data=[%s]\n",
117 PFID(&hai->hai_fid), PFID(&hai->hai_dfid),
119 hsm_copytool_action2name(hai->hai_action),
120 hai->hai_extent.offset,
121 hai->hai_extent.length,
123 hai_dump_data_field(hai, buf, sizeof(buf)));
129 * data passed to llog_cat_process() callback
130 * to scan requests and take actions
132 struct hsm_scan_request {
135 struct hsm_action_list *hal;
138 struct hsm_scan_data {
139 struct mdt_thread_info *hsd_mti;
140 char hsd_fsname[MTI_NAME_MAXLEN + 1];
141 /* are we scanning the logs for housekeeping, or just looking
144 bool hsd_housekeeping;
145 bool hsd_one_restore;
146 int hsd_action_count;
147 int hsd_request_len; /* array alloc len */
148 int hsd_request_count; /* array used count */
149 struct hsm_scan_request *hsd_request;
152 static int mdt_cdt_waiting_cb(const struct lu_env *env,
153 struct mdt_device *mdt,
154 struct llog_handle *llh,
155 struct llog_agent_req_rec *larr,
156 struct hsm_scan_data *hsd)
158 struct coordinator *cdt = &mdt->mdt_coordinator;
159 struct hsm_scan_request *request;
160 struct hsm_action_item *hai;
165 /* Are agents full? */
166 if (hsd->hsd_action_count + atomic_read(&cdt->cdt_request_count) >=
167 cdt->cdt_max_requests) {
168 /* We cannot send any more request
170 * *** SPECIAL CASE ***
172 * Restore requests are too important not to schedule at least
173 * one, everytime we can.
175 if (larr->arr_hai.hai_action != HSMA_RESTORE ||
176 hsd->hsd_one_restore)
177 RETURN(hsd->hsd_housekeeping ? 0 : LLOG_PROC_BREAK);
180 hai_size = cfs_size_round(larr->arr_hai.hai_len);
181 archive_id = larr->arr_archive_id;
183 /* Can we add this action to one of the existing HALs in hsd. */
185 for (i = 0; i < hsd->hsd_request_count; i++) {
186 if (hsd->hsd_request[i].hal->hal_archive_id == archive_id &&
187 hsd->hsd_request[i].hal_used_sz + hai_size <=
189 request = &hsd->hsd_request[i];
194 /* Are we trying to force-schedule a request? */
195 if (hsd->hsd_action_count + atomic_read(&cdt->cdt_request_count) >=
196 cdt->cdt_max_requests) {
197 /* Is there really no compatible hsm_scan_request? */
199 for (i -= 1; i >= 0; i--) {
200 if (hsd->hsd_request[i].hal->hal_archive_id ==
202 request = &hsd->hsd_request[i];
208 /* Make room for the hai */
210 /* Discard the last hai until there is enough space */
212 request->hal->hal_count--;
214 hai = hai_first(request->hal);
215 for (i = 0; i < request->hal->hal_count; i++)
217 request->hal_used_sz -=
218 cfs_size_round(hai->hai_len);
219 hsd->hsd_action_count--;
220 } while (request->hal_used_sz + hai_size >
222 } else if (hsd->hsd_housekeeping) {
223 struct hsm_scan_request *tmp;
225 /* Discard the (whole) last hal */
226 hsd->hsd_request_count--;
227 tmp = &hsd->hsd_request[hsd->hsd_request_count];
228 hsd->hsd_action_count -= tmp->hal->hal_count;
229 OBD_FREE(tmp->hal, tmp->hal_sz);
231 /* Bailing out, this code path is too hot */
232 RETURN(LLOG_PROC_BREAK);
238 struct hsm_action_list *hal;
240 LASSERT(hsd->hsd_request_count < hsd->hsd_request_len);
241 request = &hsd->hsd_request[hsd->hsd_request_count];
243 /* allocates hai vector size just needs to be large
245 request->hal_sz = sizeof(*request->hal) +
246 cfs_size_round(MTI_NAME_MAXLEN + 1) + 2 * hai_size;
247 OBD_ALLOC_LARGE(hal, request->hal_sz);
251 hal->hal_version = HAL_VERSION;
252 strlcpy(hal->hal_fsname, hsd->hsd_fsname, MTI_NAME_MAXLEN + 1);
253 hal->hal_archive_id = larr->arr_archive_id;
254 hal->hal_flags = larr->arr_flags;
256 request->hal_used_sz = hal_size(hal);
258 hsd->hsd_request_count++;
259 } else if (request->hal_sz < request->hal_used_sz + hai_size) {
260 /* Not enough room, need an extension */
264 sz = min_t(int, 2 * request->hal_sz, LDLM_MAXREQSIZE);
265 LASSERT(request->hal_used_sz + hai_size < sz);
267 OBD_ALLOC_LARGE(hal_buffer, sz);
271 memcpy(hal_buffer, request->hal, request->hal_used_sz);
272 OBD_FREE_LARGE(request->hal, request->hal_sz);
273 request->hal = hal_buffer;
274 request->hal_sz = sz;
277 hai = hai_first(request->hal);
278 for (i = 0; i < request->hal->hal_count; i++)
281 memcpy(hai, &larr->arr_hai, larr->arr_hai.hai_len);
283 request->hal_used_sz += hai_size;
284 request->hal->hal_count++;
286 hsd->hsd_action_count++;
288 switch (hai->hai_action) {
292 hsd->hsd_one_restore = true;
293 /* Intentional fallthrough */
295 cdt_agent_record_hash_add(cdt, hai->hai_cookie,
296 llh->lgh_hdr->llh_cat_idx,
297 larr->arr_hdr.lrh_index);
303 static int mdt_cdt_started_cb(const struct lu_env *env,
304 struct mdt_device *mdt,
305 struct llog_handle *llh,
306 struct llog_agent_req_rec *larr,
307 struct hsm_scan_data *hsd)
309 struct coordinator *cdt = &mdt->mdt_coordinator;
310 struct hsm_action_item *hai = &larr->arr_hai;
311 struct cdt_agent_req *car;
312 time64_t now = ktime_get_real_seconds();
317 if (!hsd->hsd_housekeeping)
320 /* we search for a running request
321 * error may happen if coordinator crashes or stopped
322 * with running request
324 car = mdt_cdt_find_request(cdt, hai->hai_cookie);
326 last = larr->arr_req_change;
328 last = car->car_req_update;
331 /* test if request too long, if yes cancel it
332 * the same way the copy tool acknowledge a cancel request */
333 if (now <= last + cdt->cdt_active_req_timeout)
334 GOTO(out_car, rc = 0);
336 dump_llog_agent_req_rec("request timed out, start cleaning", larr);
339 car->car_req_update = now;
340 mdt_hsm_agent_update_statistics(cdt, 0, 1, 0, &car->car_uuid);
341 /* Remove car from memory list (LU-9075) */
342 mdt_cdt_remove_request(cdt, hai->hai_cookie);
345 /* Emit a changelog record for the failed action.*/
347 hsm_set_cl_error(&cl_flags, ECANCELED);
349 switch (hai->hai_action) {
351 hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
354 hsm_set_cl_event(&cl_flags, HE_RESTORE);
357 hsm_set_cl_event(&cl_flags, HE_REMOVE);
360 hsm_set_cl_event(&cl_flags, HE_CANCEL);
363 /* Unknown record type, skip changelog. */
369 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
372 if (hai->hai_action == HSMA_RESTORE)
373 cdt_restore_handle_del(hsd->hsd_mti, cdt, &hai->hai_fid);
375 larr->arr_status = ARS_CANCELED;
376 larr->arr_req_change = now;
377 rc = llog_write(hsd->hsd_mti->mti_env, llh, &larr->arr_hdr,
378 larr->arr_hdr.lrh_index);
380 CERROR("%s: cannot update agent log: rc = %d\n",
381 mdt_obd_name(mdt), rc);
382 rc = LLOG_DEL_RECORD;
385 /* ct has completed a request, so a slot is available,
386 * signal the coordinator to find new work */
387 mdt_hsm_cdt_event(cdt);
390 mdt_cdt_put_request(car);
396 * llog_cat_process() callback, used to:
397 * - find waiting request and start action
398 * - purge canceled and done requests
399 * \param env [IN] environment
400 * \param llh [IN] llog handle
401 * \param hdr [IN] llog record
402 * \param data [IN/OUT] cb data = struct hsm_scan_data
404 * \retval -ve failure
406 static int mdt_coordinator_cb(const struct lu_env *env,
407 struct llog_handle *llh,
408 struct llog_rec_hdr *hdr,
411 struct llog_agent_req_rec *larr = (struct llog_agent_req_rec *)hdr;
412 struct hsm_scan_data *hsd = data;
413 struct mdt_device *mdt = hsd->hsd_mti->mti_mdt;
414 struct coordinator *cdt = &mdt->mdt_coordinator;
417 larr = (struct llog_agent_req_rec *)hdr;
418 dump_llog_agent_req_rec("mdt_coordinator_cb(): ", larr);
419 switch (larr->arr_status) {
421 RETURN(mdt_cdt_waiting_cb(env, mdt, llh, larr, hsd));
423 RETURN(mdt_cdt_started_cb(env, mdt, llh, larr, hsd));
425 if (!hsd->hsd_housekeeping)
428 if ((larr->arr_req_change + cdt->cdt_grace_delay) <
429 ktime_get_real_seconds()) {
430 cdt_agent_record_hash_del(cdt,
431 larr->arr_hai.hai_cookie);
432 RETURN(LLOG_DEL_RECORD);
440 * create /proc entries for coordinator
443 * \retval -ve failure
445 int hsm_cdt_procfs_init(struct mdt_device *mdt)
447 struct coordinator *cdt = &mdt->mdt_coordinator;
451 /* init /proc entries, failure is not critical */
452 cdt->cdt_proc_dir = lprocfs_register("hsm",
453 mdt2obd_dev(mdt)->obd_proc_entry,
454 lprocfs_mdt_hsm_vars, mdt);
455 if (IS_ERR(cdt->cdt_proc_dir)) {
456 rc = PTR_ERR(cdt->cdt_proc_dir);
457 CERROR("%s: Cannot create 'hsm' directory in mdt proc dir,"
458 " rc=%d\n", mdt_obd_name(mdt), rc);
459 cdt->cdt_proc_dir = NULL;
467 * remove /proc entries for coordinator
470 void hsm_cdt_procfs_fini(struct mdt_device *mdt)
472 struct coordinator *cdt = &mdt->mdt_coordinator;
474 if (cdt->cdt_proc_dir != NULL)
475 lprocfs_remove(&cdt->cdt_proc_dir);
479 * get vector of hsm cdt /proc vars
483 struct lprocfs_vars *hsm_cdt_get_proc_vars(void)
485 return lprocfs_mdt_hsm_vars;
488 /* Release the ressource used by the coordinator. Called when the
489 * coordinator is stopping. */
490 static void mdt_hsm_cdt_cleanup(struct mdt_device *mdt)
492 struct coordinator *cdt = &mdt->mdt_coordinator;
493 struct cdt_agent_req *car, *tmp1;
494 struct hsm_agent *ha, *tmp2;
495 struct cdt_restore_handle *crh, *tmp3;
496 struct mdt_thread_info *cdt_mti;
499 down_write(&cdt->cdt_request_lock);
500 list_for_each_entry_safe(car, tmp1, &cdt->cdt_request_list,
502 cfs_hash_del(cdt->cdt_request_cookie_hash,
503 &car->car_hai->hai_cookie,
504 &car->car_cookie_hash);
505 list_del(&car->car_request_list);
506 mdt_cdt_put_request(car);
508 up_write(&cdt->cdt_request_lock);
510 down_write(&cdt->cdt_agent_lock);
511 list_for_each_entry_safe(ha, tmp2, &cdt->cdt_agents, ha_list) {
512 list_del(&ha->ha_list);
513 if (ha->ha_archive_cnt != 0)
514 OBD_FREE(ha->ha_archive_id, ha->ha_archive_cnt *
515 sizeof(*ha->ha_archive_id));
518 up_write(&cdt->cdt_agent_lock);
520 cdt_mti = lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
521 mutex_lock(&cdt->cdt_restore_lock);
522 list_for_each_entry_safe(crh, tmp3, &cdt->cdt_restore_handle_list,
524 list_del(&crh->crh_list);
525 /* give back layout lock */
526 mdt_object_unlock(cdt_mti, NULL, &crh->crh_lh, 1);
527 OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
529 mutex_unlock(&cdt->cdt_restore_lock);
533 * Coordinator state transition table, indexed on enum cdt_states, taking
534 * from and to states. For instance since CDT_INIT to CDT_RUNNING is a
535 * valid transition, cdt_transition[CDT_INIT][CDT_RUNNING] is true.
537 static bool cdt_transition[CDT_STATES_COUNT][CDT_STATES_COUNT] = {
538 /* from -> to: stopped init running disable stopping */
539 /* stopped */ { true, true, false, false, false },
540 /* init */ { true, false, true, false, false },
541 /* running */ { false, false, true, true, true },
542 /* disable */ { false, false, true, true, true },
543 /* stopping */ { true, false, false, false, false }
547 * Change coordinator thread state
548 * Some combinations are not valid, so catch them here.
550 * Returns 0 on success, with old_state set if not NULL, or -EINVAL if
551 * the transition was not possible.
553 static int set_cdt_state_locked(struct coordinator *cdt,
554 enum cdt_states new_state)
557 enum cdt_states state;
559 state = cdt->cdt_state;
561 if (cdt_transition[state][new_state]) {
562 cdt->cdt_state = new_state;
566 "unexpected coordinator transition, from=%s, to=%s\n",
567 cdt_mdt_state2str(state), cdt_mdt_state2str(new_state));
574 static int set_cdt_state(struct coordinator *cdt, enum cdt_states new_state)
578 mutex_lock(&cdt->cdt_state_lock);
579 rc = set_cdt_state_locked(cdt, new_state);
580 mutex_unlock(&cdt->cdt_state_lock);
589 * \param data [IN] obd device
591 * \retval -ve failure
593 static int mdt_coordinator(void *data)
595 struct mdt_thread_info *mti = data;
596 struct mdt_device *mdt = mti->mti_mdt;
597 struct coordinator *cdt = &mdt->mdt_coordinator;
598 struct hsm_scan_data hsd = { NULL };
599 time64_t last_housekeeping = 0;
600 size_t request_sz = 0;
604 CDEBUG(D_HSM, "%s: coordinator thread starting, pid=%d\n",
605 mdt_obd_name(mdt), current_pid());
608 obd_uuid2fsname(hsd.hsd_fsname, mdt_obd_name(mdt),
609 sizeof(hsd.hsd_fsname));
611 set_cdt_state(cdt, CDT_RUNNING);
613 /* Inform mdt_hsm_cdt_start(). */
614 wake_up_all(&cdt->cdt_waitq);
621 struct hsm_record_update *updates;
623 /* Limit execution of the expensive requests traversal
624 * to at most one second. This prevents repeatedly
625 * locking/unlocking the catalog for each request
626 * and preventing other HSM operations from happening
628 wait_event_interruptible_timeout(cdt->cdt_waitq,
629 kthread_should_stop() ||
630 cdt->cdt_wakeup_coordinator,
631 cfs_time_seconds(1));
633 cdt->cdt_wakeup_coordinator = false;
634 CDEBUG(D_HSM, "coordinator resumes\n");
636 if (kthread_should_stop()) {
637 CDEBUG(D_HSM, "Coordinator stops\n");
642 /* if coordinator is suspended continue to wait */
643 if (cdt->cdt_state == CDT_DISABLE) {
644 CDEBUG(D_HSM, "disable state, coordinator sleeps\n");
648 /* If no event, and no housekeeping to do, continue to
650 if (last_housekeeping + cdt->cdt_loop_period <=
651 ktime_get_real_seconds()) {
652 last_housekeeping = ktime_get_real_seconds();
653 hsd.hsd_housekeeping = true;
654 } else if (cdt->cdt_event) {
655 hsd.hsd_housekeeping = false;
660 cdt->cdt_event = false;
662 CDEBUG(D_HSM, "coordinator starts reading llog\n");
664 if (hsd.hsd_request_len != cdt->cdt_max_requests) {
665 /* cdt_max_requests has changed,
666 * we need to allocate a new buffer
668 struct hsm_scan_request *tmp = NULL;
669 int max_requests = cdt->cdt_max_requests;
670 OBD_ALLOC_LARGE(tmp, max_requests *
671 sizeof(struct hsm_scan_request));
673 CERROR("Failed to resize request buffer, "
674 "keeping it at %d\n",
675 hsd.hsd_request_len);
677 if (hsd.hsd_request != NULL)
678 OBD_FREE_LARGE(hsd.hsd_request,
681 hsd.hsd_request_len = max_requests;
682 request_sz = hsd.hsd_request_len *
683 sizeof(struct hsm_scan_request);
684 hsd.hsd_request = tmp;
688 hsd.hsd_action_count = 0;
689 hsd.hsd_request_count = 0;
690 hsd.hsd_one_restore = false;
692 rc = cdt_llog_process(mti->mti_env, mdt, mdt_coordinator_cb,
697 CDEBUG(D_HSM, "found %d requests to send\n",
698 hsd.hsd_request_count);
700 if (list_empty(&cdt->cdt_agents)) {
701 CDEBUG(D_HSM, "no agent available, "
702 "coordinator sleeps\n");
706 /* Compute how many HAI we have in all the requests */
708 for (i = 0; i < hsd.hsd_request_count; i++) {
709 const struct hsm_scan_request *request =
712 updates_cnt += request->hal->hal_count;
715 /* Allocate a temporary array to store the cookies to
716 * update, and their status. */
717 updates_sz = updates_cnt * sizeof(*updates);
718 OBD_ALLOC_LARGE(updates, updates_sz);
719 if (updates == NULL) {
720 CERROR("%s: Cannot allocate memory (%d o) "
722 mdt_obd_name(mdt), updates_sz, updates_cnt);
726 /* here hsd contains a list of requests to be started */
727 for (i = 0; i < hsd.hsd_request_count; i++) {
728 struct hsm_scan_request *request = &hsd.hsd_request[i];
729 struct hsm_action_list *hal = request->hal;
730 struct hsm_action_item *hai;
733 /* still room for work ? */
734 if (atomic_read(&cdt->cdt_request_count) >=
735 cdt->cdt_max_requests)
738 rc = mdt_hsm_agent_send(mti, hal, 0);
739 /* if failure, we suppose it is temporary
740 * if the copy tool failed to do the request
741 * it has to use hsm_progress
744 /* set up cookie vector to set records status
745 * after copy tools start or failed
747 hai = hai_first(hal);
748 for (j = 0; j < hal->hal_count; j++) {
749 updates[update_idx].cookie = hai->hai_cookie;
750 updates[update_idx].status =
751 (rc ? ARS_WAITING : ARS_STARTED);
758 rc = mdt_agent_record_update(mti->mti_env, mdt,
759 updates, update_idx);
761 CERROR("%s: mdt_agent_record_update() failed, "
762 "rc=%d, cannot update records "
764 mdt_obd_name(mdt), rc, update_idx);
767 OBD_FREE_LARGE(updates, updates_sz);
770 /* free hal allocated by callback */
771 for (i = 0; i < hsd.hsd_request_count; i++) {
772 struct hsm_scan_request *request = &hsd.hsd_request[i];
774 OBD_FREE_LARGE(request->hal, request->hal_sz);
778 if (hsd.hsd_request != NULL)
779 OBD_FREE_LARGE(hsd.hsd_request, request_sz);
781 mdt_hsm_cdt_cleanup(mdt);
784 CERROR("%s: coordinator thread exiting, process=%d, rc=%d\n",
785 mdt_obd_name(mdt), current_pid(), rc);
787 CDEBUG(D_HSM, "%s: coordinator thread exiting, process=%d,"
789 mdt_obd_name(mdt), current_pid());
794 int cdt_restore_handle_add(struct mdt_thread_info *mti, struct coordinator *cdt,
795 const struct lu_fid *fid,
796 const struct hsm_extent *he)
798 struct cdt_restore_handle *crh;
799 struct mdt_object *obj;
803 OBD_SLAB_ALLOC_PTR(crh, mdt_hsm_cdt_kmem);
808 /* in V1 all file is restored
809 * crh->extent.start = he->offset;
810 * crh->extent.end = he->offset + he->length;
812 crh->crh_extent.start = 0;
813 crh->crh_extent.end = he->length;
814 /* get the layout lock */
815 mdt_lock_reg_init(&crh->crh_lh, LCK_EX);
816 obj = mdt_object_find_lock(mti, &crh->crh_fid, &crh->crh_lh,
817 MDS_INODELOCK_LAYOUT);
819 GOTO(out_crh, rc = PTR_ERR(obj));
821 /* We do not keep a reference on the object during the restore
822 * which can be very long. */
823 mdt_object_put(mti->mti_env, obj);
825 mutex_lock(&cdt->cdt_restore_lock);
826 if (unlikely(cdt->cdt_state == CDT_STOPPED ||
827 cdt->cdt_state == CDT_STOPPING)) {
828 mutex_unlock(&cdt->cdt_restore_lock);
829 GOTO(out_lh, rc = -EAGAIN);
832 list_add_tail(&crh->crh_list, &cdt->cdt_restore_handle_list);
833 mutex_unlock(&cdt->cdt_restore_lock);
837 mdt_object_unlock(mti, NULL, &crh->crh_lh, 1);
839 OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
845 * lookup a restore handle by FID
846 * caller needs to hold cdt_restore_lock
847 * \param cdt [IN] coordinator
848 * \param fid [IN] FID
849 * \retval cdt_restore_handle found
850 * \retval NULL not found
852 struct cdt_restore_handle *cdt_restore_handle_find(struct coordinator *cdt,
853 const struct lu_fid *fid)
855 struct cdt_restore_handle *crh;
858 list_for_each_entry(crh, &cdt->cdt_restore_handle_list, crh_list) {
859 if (lu_fid_eq(&crh->crh_fid, fid))
866 void cdt_restore_handle_del(struct mdt_thread_info *mti,
867 struct coordinator *cdt, const struct lu_fid *fid)
869 struct cdt_restore_handle *crh;
871 /* give back layout lock */
872 mutex_lock(&cdt->cdt_restore_lock);
873 crh = cdt_restore_handle_find(cdt, fid);
875 list_del(&crh->crh_list);
876 mutex_unlock(&cdt->cdt_restore_lock);
881 /* XXX We pass a NULL object since the restore handle does not
882 * keep a reference on the object being restored. */
883 mdt_object_unlock(mti, NULL, &crh->crh_lh, 1);
884 OBD_SLAB_FREE_PTR(crh, mdt_hsm_cdt_kmem);
888 * data passed to llog_cat_process() callback
889 * to scan requests and take actions
891 struct hsm_restore_data {
892 struct mdt_thread_info *hrd_mti;
896 * llog_cat_process() callback, used to:
897 * - find restore request and allocate the restore handle
898 * \param env [IN] environment
899 * \param llh [IN] llog handle
900 * \param hdr [IN] llog record
901 * \param data [IN/OUT] cb data = struct hsm_restore_data
903 * \retval -ve failure
905 static int hsm_restore_cb(const struct lu_env *env,
906 struct llog_handle *llh,
907 struct llog_rec_hdr *hdr, void *data)
909 struct llog_agent_req_rec *larr;
910 struct hsm_restore_data *hrd;
911 struct hsm_action_item *hai;
912 struct mdt_thread_info *mti;
913 struct coordinator *cdt;
919 cdt = &mti->mti_mdt->mdt_coordinator;
921 larr = (struct llog_agent_req_rec *)hdr;
922 hai = &larr->arr_hai;
923 if (hai->hai_cookie > cdt->cdt_last_cookie)
924 /* update the cookie to avoid collision */
925 cdt->cdt_last_cookie = hai->hai_cookie + 1;
927 if (hai->hai_action != HSMA_RESTORE ||
928 agent_req_in_final_state(larr->arr_status))
931 /* restore request not in a final state */
933 /* force replay of restore requests left in started state from previous
934 * CDT context, to be canceled later if finally found to be incompatible
935 * when being re-started */
936 if (larr->arr_status == ARS_STARTED) {
937 larr->arr_status = ARS_WAITING;
938 larr->arr_req_change = ktime_get_real_seconds();
939 rc = llog_write(env, llh, hdr, hdr->lrh_index);
944 rc = cdt_restore_handle_add(mti, cdt, &hai->hai_fid, &hai->hai_extent);
950 * restore coordinator state at startup
951 * the goal is to take a layout lock for each registered restore request
952 * \param mti [IN] context
954 static int mdt_hsm_pending_restore(struct mdt_thread_info *mti)
956 struct hsm_restore_data hrd;
962 rc = cdt_llog_process(mti->mti_env, mti->mti_mdt, hsm_restore_cb, &hrd,
968 static int hsm_init_ucred(struct lu_ucred *uc)
972 uc->uc_valid = UCRED_OLD;
981 uc->uc_suppgids[0] = -1;
982 uc->uc_suppgids[1] = -1;
983 uc->uc_cap = CFS_CAP_FS_MASK;
986 uc->uc_identity = NULL;
987 /* always record internal HSM activity if also enabled globally */
988 uc->uc_enable_audit = 1;
994 * initialize coordinator struct
995 * \param mdt [IN] device
997 * \retval -ve failure
999 int mdt_hsm_cdt_init(struct mdt_device *mdt)
1001 struct coordinator *cdt = &mdt->mdt_coordinator;
1002 struct mdt_thread_info *cdt_mti = NULL;
1006 init_waitqueue_head(&cdt->cdt_waitq);
1007 init_rwsem(&cdt->cdt_llog_lock);
1008 init_rwsem(&cdt->cdt_agent_lock);
1009 init_rwsem(&cdt->cdt_request_lock);
1010 mutex_init(&cdt->cdt_restore_lock);
1011 mutex_init(&cdt->cdt_state_lock);
1012 set_cdt_state(cdt, CDT_STOPPED);
1014 INIT_LIST_HEAD(&cdt->cdt_request_list);
1015 INIT_LIST_HEAD(&cdt->cdt_agents);
1016 INIT_LIST_HEAD(&cdt->cdt_restore_handle_list);
1018 cdt->cdt_request_cookie_hash = cfs_hash_create("REQUEST_COOKIE_HASH",
1022 0 /* extra bytes */,
1025 &cdt_request_cookie_hash_ops,
1027 if (cdt->cdt_request_cookie_hash == NULL)
1030 cdt->cdt_agent_record_hash = cfs_hash_create("AGENT_RECORD_HASH",
1034 0 /* extra bytes */,
1037 &cdt_agent_record_hash_ops,
1039 if (cdt->cdt_agent_record_hash == NULL)
1040 GOTO(out_request_cookie_hash, rc = -ENOMEM);
1042 rc = lu_env_init(&cdt->cdt_env, LCT_MD_THREAD);
1044 GOTO(out_agent_record_hash, rc);
1046 /* for mdt_ucred(), lu_ucred stored in lu_ucred_key */
1047 rc = lu_context_init(&cdt->cdt_session, LCT_SERVER_SESSION);
1051 lu_context_enter(&cdt->cdt_session);
1052 cdt->cdt_env.le_ses = &cdt->cdt_session;
1054 cdt_mti = lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
1055 LASSERT(cdt_mti != NULL);
1057 cdt_mti->mti_env = &cdt->cdt_env;
1058 cdt_mti->mti_mdt = mdt;
1060 hsm_init_ucred(mdt_ucred(cdt_mti));
1062 /* default values for /proc tunnables
1063 * can be override by MGS conf */
1064 cdt->cdt_default_archive_id = 1;
1065 cdt->cdt_grace_delay = 60;
1066 cdt->cdt_loop_period = 10;
1067 cdt->cdt_max_requests = 3;
1068 cdt->cdt_policy = CDT_DEFAULT_POLICY;
1069 cdt->cdt_active_req_timeout = 3600;
1071 /* by default do not remove archives on last unlink */
1072 cdt->cdt_remove_archive_on_last_unlink = false;
1077 lu_env_fini(&cdt->cdt_env);
1078 out_agent_record_hash:
1079 cfs_hash_putref(cdt->cdt_agent_record_hash);
1080 cdt->cdt_agent_record_hash = NULL;
1081 out_request_cookie_hash:
1082 cfs_hash_putref(cdt->cdt_request_cookie_hash);
1083 cdt->cdt_request_cookie_hash = NULL;
1089 * free a coordinator thread
1090 * \param mdt [IN] device
1092 int mdt_hsm_cdt_fini(struct mdt_device *mdt)
1094 struct coordinator *cdt = &mdt->mdt_coordinator;
1097 lu_context_exit(cdt->cdt_env.le_ses);
1098 lu_context_fini(cdt->cdt_env.le_ses);
1100 lu_env_fini(&cdt->cdt_env);
1102 cfs_hash_putref(cdt->cdt_agent_record_hash);
1103 cdt->cdt_agent_record_hash = NULL;
1105 cfs_hash_putref(cdt->cdt_request_cookie_hash);
1106 cdt->cdt_request_cookie_hash = NULL;
1112 * start a coordinator thread
1113 * \param mdt [IN] device
1115 * \retval -ve failure
1117 static int mdt_hsm_cdt_start(struct mdt_device *mdt)
1119 struct coordinator *cdt = &mdt->mdt_coordinator;
1120 struct mdt_thread_info *cdt_mti;
1123 struct task_struct *task;
1126 /* functions defined but not yet used
1127 * this avoid compilation warning
1129 ptr = dump_requests;
1131 rc = set_cdt_state(cdt, CDT_INIT);
1133 CERROR("%s: Coordinator already started or stopping\n",
1138 CLASSERT(1 << (CDT_POLICY_SHIFT_COUNT - 1) == CDT_POLICY_LAST);
1139 cdt->cdt_policy = CDT_DEFAULT_POLICY;
1141 /* just need to be larger than previous one */
1142 /* cdt_last_cookie is protected by cdt_llog_lock */
1143 cdt->cdt_last_cookie = ktime_get_real_seconds();
1144 atomic_set(&cdt->cdt_request_count, 0);
1145 atomic_set(&cdt->cdt_archive_count, 0);
1146 atomic_set(&cdt->cdt_restore_count, 0);
1147 atomic_set(&cdt->cdt_remove_count, 0);
1148 cdt->cdt_user_request_mask = (1UL << HSMA_RESTORE);
1149 cdt->cdt_group_request_mask = (1UL << HSMA_RESTORE);
1150 cdt->cdt_other_request_mask = (1UL << HSMA_RESTORE);
1152 /* to avoid deadlock when start is made through /proc
1153 * /proc entries are created by the coordinator thread */
1155 /* set up list of started restore requests */
1156 cdt_mti = lu_context_key_get(&cdt->cdt_env.le_ctx, &mdt_thread_key);
1157 rc = mdt_hsm_pending_restore(cdt_mti);
1159 CERROR("%s: cannot take the layout locks needed"
1160 " for registered restore: %d\n",
1161 mdt_obd_name(mdt), rc);
1163 if (mdt->mdt_bottom->dd_rdonly)
1166 task = kthread_run(mdt_coordinator, cdt_mti, "hsm_cdtr");
1169 set_cdt_state(cdt, CDT_STOPPED);
1170 CERROR("%s: error starting coordinator thread: %d\n",
1171 mdt_obd_name(mdt), rc);
1173 cdt->cdt_task = task;
1174 wait_event(cdt->cdt_waitq,
1175 cdt->cdt_state != CDT_INIT);
1176 CDEBUG(D_HSM, "%s: coordinator thread started\n",
1185 * stop a coordinator thread
1186 * \param mdt [IN] device
1188 int mdt_hsm_cdt_stop(struct mdt_device *mdt)
1190 struct coordinator *cdt = &mdt->mdt_coordinator;
1194 /* stop coordinator thread */
1195 rc = set_cdt_state(cdt, CDT_STOPPING);
1197 kthread_stop(cdt->cdt_task);
1198 cdt->cdt_task = NULL;
1199 set_cdt_state(cdt, CDT_STOPPED);
1205 static int mdt_hsm_set_exists(struct mdt_thread_info *mti,
1206 const struct lu_fid *fid,
1209 struct mdt_object *obj;
1213 obj = mdt_hsm_get_md_hsm(mti, fid, &mh);
1215 GOTO(out, rc = PTR_ERR(obj));
1217 if (mh.mh_flags & HS_EXISTS &&
1218 mh.mh_arch_id == archive_id)
1219 GOTO(out_obj, rc = 0);
1221 mh.mh_flags |= HS_EXISTS;
1222 mh.mh_arch_id = archive_id;
1223 rc = mdt_hsm_attr_set(mti, obj, &mh);
1226 mdt_object_put(mti->mti_env, obj);
1232 * register all requests from an hal in the memory list
1233 * \param mti [IN] context
1234 * \param hal [IN] request
1235 * \param uuid [OUT] in case of CANCEL, the uuid of the agent
1236 * which is running the CT
1238 * \retval -ve failure
1240 int mdt_hsm_add_hal(struct mdt_thread_info *mti,
1241 struct hsm_action_list *hal, struct obd_uuid *uuid)
1243 struct mdt_device *mdt = mti->mti_mdt;
1244 struct coordinator *cdt = &mdt->mdt_coordinator;
1245 struct hsm_action_item *hai;
1249 /* register request in memory list */
1250 hai = hai_first(hal);
1251 for (i = 0; i < hal->hal_count; i++, hai = hai_next(hai)) {
1252 struct cdt_agent_req *car;
1254 /* in case of a cancel request, we first mark the ondisk
1255 * record of the request we want to stop as canceled
1256 * this does not change the cancel record
1257 * it will be done when updating the request status
1259 if (hai->hai_action == HSMA_CANCEL) {
1260 struct hsm_record_update update = {
1261 .cookie = hai->hai_cookie,
1262 .status = ARS_CANCELED,
1265 rc = mdt_agent_record_update(mti->mti_env, mti->mti_mdt,
1268 CERROR("%s: mdt_agent_record_update() failed, "
1269 "rc=%d, cannot update status to %s "
1270 "for cookie %#llx\n",
1271 mdt_obd_name(mdt), rc,
1272 agent_req_status2name(ARS_CANCELED),
1277 /* find the running request to set it canceled */
1278 car = mdt_cdt_find_request(cdt, hai->hai_cookie);
1280 car->car_canceled = 1;
1281 /* uuid has to be changed to the one running the
1282 * request to cancel */
1283 *uuid = car->car_uuid;
1284 mdt_cdt_put_request(car);
1286 /* no need to memorize cancel request
1287 * this also avoid a deadlock when we receive
1288 * a purge all requests command
1293 if (hai->hai_action == HSMA_ARCHIVE) {
1294 rc = mdt_hsm_set_exists(mti, &hai->hai_fid,
1295 hal->hal_archive_id);
1302 car = mdt_cdt_alloc_request(hal->hal_archive_id, hal->hal_flags,
1305 GOTO(out, rc = PTR_ERR(car));
1307 rc = mdt_cdt_add_request(cdt, car);
1309 mdt_cdt_free_request(car);
1316 * swap layouts between 2 fids
1317 * \param mti [IN] context
1320 * \param mh_common [IN] MD HSM
1322 static int hsm_swap_layouts(struct mdt_thread_info *mti,
1323 struct mdt_object *obj, const struct lu_fid *dfid,
1324 struct md_hsm *mh_common)
1326 struct mdt_object *dobj;
1327 struct mdt_lock_handle *dlh;
1331 if (!mdt_object_exists(obj))
1332 GOTO(out, rc = -ENOENT);
1334 /* we already have layout lock on obj so take only
1336 dlh = &mti->mti_lh[MDT_LH_OLD];
1337 mdt_lock_reg_init(dlh, LCK_EX);
1338 dobj = mdt_object_find_lock(mti, dfid, dlh, MDS_INODELOCK_LAYOUT);
1340 GOTO(out, rc = PTR_ERR(dobj));
1342 /* if copy tool closes the volatile before sending the final
1343 * progress through llapi_hsm_copy_end(), all the objects
1344 * are removed and mdd_swap_layout LBUG */
1345 if (!mdt_object_exists(dobj)) {
1346 CERROR("%s: Copytool has closed volatile file "DFID"\n",
1347 mdt_obd_name(mti->mti_mdt), PFID(dfid));
1348 GOTO(out_dobj, rc = -ENOENT);
1350 /* Since we only handle restores here, unconditionally use
1351 * SWAP_LAYOUTS_MDS_HSM flag to ensure original layout will
1352 * be preserved in case of failure during swap_layout and not
1353 * leave a file in an intermediate but incoherent state.
1354 * But need to setup HSM xattr of data FID before, reuse
1355 * mti and mh presets for FID in hsm_cdt_request_completed(),
1356 * only need to clear RELEASED and DIRTY.
1358 mh_common->mh_flags &= ~(HS_RELEASED | HS_DIRTY);
1359 rc = mdt_hsm_attr_set(mti, dobj, mh_common);
1361 rc = mo_swap_layouts(mti->mti_env,
1362 mdt_object_child(obj),
1363 mdt_object_child(dobj),
1364 SWAP_LAYOUTS_MDS_HSM);
1366 rc = mdt_lsom_downgrade(mti, obj);
1369 "%s: File fid="DFID" SOM "
1370 "downgrade failed, rc = %d\n",
1371 mdt_obd_name(mti->mti_mdt),
1372 PFID(mdt_object_fid(obj)), rc);
1375 mdt_object_unlock_put(mti, dobj, dlh, 1);
1381 * update status of a completed request
1382 * \param mti [IN] context
1383 * \param pgs [IN] progress of the copy tool
1385 * \retval -ve failure
1387 static int hsm_cdt_request_completed(struct mdt_thread_info *mti,
1388 struct hsm_progress_kernel *pgs,
1389 const struct cdt_agent_req *car,
1390 enum agent_req_status *status)
1392 const struct lu_env *env = mti->mti_env;
1393 struct mdt_device *mdt = mti->mti_mdt;
1394 struct coordinator *cdt = &mdt->mdt_coordinator;
1395 struct mdt_object *obj = NULL;
1396 int cl_flags = 0, rc = 0;
1399 bool need_changelog = true;
1402 /* default is to retry */
1403 *status = ARS_WAITING;
1405 /* find object by FID, mdt_hsm_get_md_hsm() returns obj or err
1406 * if error/removed continue anyway to get correct reporting done */
1407 obj = mdt_hsm_get_md_hsm(mti, &car->car_hai->hai_fid, &mh);
1408 /* we will update MD HSM only if needed */
1409 is_mh_changed = false;
1411 /* no need to change mh->mh_arch_id
1412 * mdt_hsm_get_md_hsm() got it from disk and it is still valid
1414 if (pgs->hpk_errval != 0) {
1415 switch (pgs->hpk_errval) {
1417 /* the copy tool does not support cancel
1418 * so the cancel request is failed
1419 * As we cannot distinguish a cancel progress
1420 * from another action progress (they have the
1421 * same cookie), we suppose here the CT returns
1422 * ENOSYS only if does not support cancel
1424 /* this can also happen when cdt calls it to
1425 * for a timed out request */
1426 *status = ARS_FAILED;
1427 /* to have a cancel event in changelog */
1428 pgs->hpk_errval = ECANCELED;
1431 /* the request record has already been set to
1432 * ARS_CANCELED, this set the cancel request
1434 *status = ARS_SUCCEED;
1437 /* retry only if current policy or requested, and
1438 * object is not on error/removed */
1439 *status = (cdt->cdt_policy & CDT_NORETRY_ACTION ||
1440 !(pgs->hpk_flags & HP_FLAG_RETRY) ||
1441 IS_ERR(obj)) ? ARS_FAILED : ARS_WAITING;
1445 if (pgs->hpk_errval > CLF_HSM_MAXERROR) {
1446 CERROR("%s: Request %#llx on "DFID
1447 " failed, error code %d too large\n",
1449 pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1451 hsm_set_cl_error(&cl_flags,
1452 CLF_HSM_ERROVERFLOW);
1455 hsm_set_cl_error(&cl_flags, pgs->hpk_errval);
1458 switch (car->car_hai->hai_action) {
1460 hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
1463 hsm_set_cl_event(&cl_flags, HE_RESTORE);
1466 hsm_set_cl_event(&cl_flags, HE_REMOVE);
1469 hsm_set_cl_event(&cl_flags, HE_CANCEL);
1470 CERROR("%s: Failed request %#llx on "DFID
1471 " cannot be a CANCEL\n",
1474 PFID(&pgs->hpk_fid));
1477 CERROR("%s: Failed request %#llx on "DFID
1478 " %d is an unknown action\n",
1480 pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1481 car->car_hai->hai_action);
1486 *status = ARS_SUCCEED;
1487 switch (car->car_hai->hai_action) {
1489 hsm_set_cl_event(&cl_flags, HE_ARCHIVE);
1490 /* set ARCHIVE keep EXIST and clear LOST and
1492 mh.mh_arch_ver = pgs->hpk_data_version;
1493 mh.mh_flags |= HS_ARCHIVED;
1494 mh.mh_flags &= ~(HS_LOST|HS_DIRTY);
1495 is_mh_changed = true;
1498 hsm_set_cl_event(&cl_flags, HE_RESTORE);
1500 /* do not clear RELEASED and DIRTY here
1501 * this will occur in hsm_swap_layouts()
1504 /* Restoring has changed the file version on
1506 mh.mh_arch_ver = pgs->hpk_data_version;
1507 is_mh_changed = true;
1510 hsm_set_cl_event(&cl_flags, HE_REMOVE);
1511 /* clear ARCHIVED EXISTS and LOST */
1512 mh.mh_flags &= ~(HS_ARCHIVED | HS_EXISTS | HS_LOST);
1513 is_mh_changed = true;
1516 hsm_set_cl_event(&cl_flags, HE_CANCEL);
1517 CERROR("%s: Successful request %#llx on "DFID" cannot be a CANCEL\n",
1520 PFID(&pgs->hpk_fid));
1523 CERROR("%s: Successful request %#llx on "DFID" %d is an unknown action\n",
1525 pgs->hpk_cookie, PFID(&pgs->hpk_fid),
1526 car->car_hai->hai_action);
1532 /* rc != 0 means error when analysing action, it may come from
1533 * a crasy CT no need to manage DIRTY
1534 * and if mdt_hsm_get_md_hsm() has returned an error, mh has not been
1537 if (rc == 0 && !IS_ERR(obj))
1538 hsm_set_cl_flags(&cl_flags,
1539 mh.mh_flags & HS_DIRTY ? CLF_HSM_DIRTY : 0);
1541 /* unlock is done later, after layout lock management */
1542 if (is_mh_changed && !IS_ERR(obj))
1543 rc = mdt_hsm_attr_set(mti, obj, &mh);
1545 /* we give back layout lock only if restore was successful or
1546 * if no retry will be attempted and if object is still alive,
1547 * in other cases we just unlock the object */
1548 if (car->car_hai->hai_action == HSMA_RESTORE) {
1549 /* restore in data FID done, we swap the layouts
1550 * only if restore is successful */
1551 if (pgs->hpk_errval == 0 && !IS_ERR(obj)) {
1552 rc = hsm_swap_layouts(mti, obj, &car->car_hai->hai_dfid,
1555 if (cdt->cdt_policy & CDT_NORETRY_ACTION)
1556 *status = ARS_FAILED;
1557 pgs->hpk_errval = -rc;
1560 /* we have to retry, so keep layout lock */
1561 if (*status == ARS_WAITING)
1564 /* restore special case, need to create ChangeLog record
1565 * before to give back layout lock to avoid concurrent
1566 * file updater to post out of order ChangeLog */
1567 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
1568 &car->car_hai->hai_fid);
1569 need_changelog = false;
1571 cdt_restore_handle_del(mti, cdt, &car->car_hai->hai_fid);
1577 /* always add a ChangeLog record */
1579 mo_changelog(env, CL_HSM, cl_flags, mdt->mdt_child,
1580 &car->car_hai->hai_fid);
1583 mdt_object_put(mti->mti_env, obj);
1589 * update status of a request
1590 * \param mti [IN] context
1591 * \param pgs [IN] progress of the copy tool
1593 * \retval -ve failure
1595 int mdt_hsm_update_request_state(struct mdt_thread_info *mti,
1596 struct hsm_progress_kernel *pgs)
1598 struct mdt_device *mdt = mti->mti_mdt;
1599 struct coordinator *cdt = &mdt->mdt_coordinator;
1600 struct cdt_agent_req *car;
1604 /* no coordinator started, so we cannot serve requests */
1605 if (cdt->cdt_state == CDT_STOPPED)
1608 /* first do sanity checks */
1609 car = mdt_cdt_update_request(cdt, pgs);
1611 CERROR("%s: Cannot find running request for cookie %#llx"
1614 pgs->hpk_cookie, PFID(&pgs->hpk_fid));
1616 RETURN(PTR_ERR(car));
1619 CDEBUG(D_HSM, "Progress received for fid="DFID" cookie=%#llx"
1620 " action=%s flags=%d err=%d fid="DFID" dfid="DFID"\n",
1621 PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1622 hsm_copytool_action2name(car->car_hai->hai_action),
1623 pgs->hpk_flags, pgs->hpk_errval,
1624 PFID(&car->car_hai->hai_fid),
1625 PFID(&car->car_hai->hai_dfid));
1627 /* progress is done on FID or data FID depending of the action and
1628 * of the copy progress */
1629 /* for restore progress is used to send back the data FID to cdt */
1630 if (car->car_hai->hai_action == HSMA_RESTORE &&
1631 lu_fid_eq(&car->car_hai->hai_fid, &car->car_hai->hai_dfid))
1632 car->car_hai->hai_dfid = pgs->hpk_fid;
1634 if ((car->car_hai->hai_action == HSMA_RESTORE ||
1635 car->car_hai->hai_action == HSMA_ARCHIVE) &&
1636 (!lu_fid_eq(&pgs->hpk_fid, &car->car_hai->hai_dfid) &&
1637 !lu_fid_eq(&pgs->hpk_fid, &car->car_hai->hai_fid))) {
1638 CERROR("%s: Progress on "DFID" for cookie %#llx"
1639 " does not match request FID "DFID" nor data FID "
1642 PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1643 PFID(&car->car_hai->hai_fid),
1644 PFID(&car->car_hai->hai_dfid));
1645 GOTO(out, rc = -EINVAL);
1648 if (pgs->hpk_errval != 0 && !(pgs->hpk_flags & HP_FLAG_COMPLETED)) {
1649 CERROR("%s: Progress on "DFID" for cookie %#llx action=%s"
1650 " is not coherent (err=%d and not completed"
1653 PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1654 hsm_copytool_action2name(car->car_hai->hai_action),
1655 pgs->hpk_errval, pgs->hpk_flags);
1656 GOTO(out, rc = -EINVAL);
1659 /* now progress is valid */
1661 /* we use a root like ucred */
1662 hsm_init_ucred(mdt_ucred(mti));
1664 if (pgs->hpk_flags & HP_FLAG_COMPLETED) {
1665 enum agent_req_status status;
1666 struct hsm_record_update update;
1669 rc = hsm_cdt_request_completed(mti, pgs, car, &status);
1671 CDEBUG(D_HSM, "updating record: fid="DFID" cookie=%#llx action=%s "
1673 PFID(&pgs->hpk_fid), pgs->hpk_cookie,
1674 hsm_copytool_action2name(car->car_hai->hai_action),
1675 agent_req_status2name(status));
1677 /* update record first (LU-9075) */
1678 update.cookie = pgs->hpk_cookie;
1679 update.status = status;
1681 rc1 = mdt_agent_record_update(mti->mti_env, mdt,
1684 CERROR("%s: mdt_agent_record_update() failed,"
1685 " rc=%d, cannot update status to %s"
1686 " for cookie %#llx\n",
1687 mdt_obd_name(mdt), rc1,
1688 agent_req_status2name(status),
1690 rc = (rc != 0 ? rc : rc1);
1692 /* then remove request from memory list (LU-9075) */
1693 mdt_cdt_remove_request(cdt, pgs->hpk_cookie);
1695 /* ct has completed a request, so a slot is available,
1696 * signal the coordinator to find new work */
1697 mdt_hsm_cdt_event(cdt);
1699 /* if copytool send a progress on a canceled request
1700 * we inform copytool it should stop
1702 if (car->car_canceled == 1)
1708 /* remove ref got from mdt_cdt_update_request() */
1709 mdt_cdt_put_request(car);
1716 * data passed to llog_cat_process() callback
1717 * to cancel requests
1719 struct hsm_cancel_all_data {
1720 struct mdt_device *mdt;
1724 * llog_cat_process() callback, used to:
1725 * - purge all requests
1726 * \param env [IN] environment
1727 * \param llh [IN] llog handle
1728 * \param hdr [IN] llog record
1729 * \param data [IN] cb data = struct hsm_cancel_all_data
1731 * \retval -ve failure
1733 static int mdt_cancel_all_cb(const struct lu_env *env,
1734 struct llog_handle *llh,
1735 struct llog_rec_hdr *hdr, void *data)
1737 struct llog_agent_req_rec *larr;
1738 struct hsm_cancel_all_data *hcad;
1742 larr = (struct llog_agent_req_rec *)hdr;
1744 if (larr->arr_status == ARS_WAITING ||
1745 larr->arr_status == ARS_STARTED) {
1746 larr->arr_status = ARS_CANCELED;
1747 larr->arr_req_change = ktime_get_real_seconds();
1748 rc = llog_write(env, llh, hdr, hdr->lrh_index);
1755 * cancel all actions
1756 * \param obd [IN] MDT device
1758 static int hsm_cancel_all_actions(struct mdt_device *mdt)
1761 struct lu_context session;
1762 struct mdt_thread_info *mti;
1763 struct coordinator *cdt = &mdt->mdt_coordinator;
1764 struct cdt_agent_req *car;
1765 struct hsm_action_list *hal = NULL;
1766 struct hsm_action_item *hai;
1767 struct hsm_cancel_all_data hcad;
1768 int hal_sz = 0, hal_len, rc;
1769 enum cdt_states old_state;
1772 rc = lu_env_init(&env, LCT_MD_THREAD);
1776 /* for mdt_ucred(), lu_ucred stored in lu_ucred_key */
1777 rc = lu_context_init(&session, LCT_SERVER_SESSION);
1781 lu_context_enter(&session);
1782 env.le_ses = &session;
1784 mti = lu_context_key_get(&env.le_ctx, &mdt_thread_key);
1785 LASSERT(mti != NULL);
1787 mti->mti_env = &env;
1790 hsm_init_ucred(mdt_ucred(mti));
1792 mutex_lock(&cdt->cdt_state_lock);
1793 old_state = cdt->cdt_state;
1795 /* disable coordinator */
1796 rc = set_cdt_state_locked(cdt, CDT_DISABLE);
1798 GOTO(out_cdt_state_unlock, rc);
1800 /* send cancel to all running requests */
1801 down_read(&cdt->cdt_request_lock);
1802 list_for_each_entry(car, &cdt->cdt_request_list, car_request_list) {
1803 mdt_cdt_get_request(car);
1804 /* request is not yet removed from list, it will be done
1805 * when copytool will return progress
1808 if (car->car_hai->hai_action == HSMA_CANCEL) {
1809 mdt_cdt_put_request(car);
1814 hal_len = sizeof(*hal) + cfs_size_round(MTI_NAME_MAXLEN + 1) +
1815 cfs_size_round(car->car_hai->hai_len);
1817 if (hal_len > hal_sz && hal_sz > 0) {
1818 /* not enough room, free old buffer */
1819 OBD_FREE(hal, hal_sz);
1823 /* empty buffer, allocate one */
1826 OBD_ALLOC(hal, hal_sz);
1828 mdt_cdt_put_request(car);
1829 up_read(&cdt->cdt_request_lock);
1830 GOTO(out_cdt_state, rc = -ENOMEM);
1834 hal->hal_version = HAL_VERSION;
1835 obd_uuid2fsname(hal->hal_fsname, mdt_obd_name(mdt),
1837 hal->hal_fsname[MTI_NAME_MAXLEN] = '\0';
1838 hal->hal_archive_id = car->car_archive_id;
1839 hal->hal_flags = car->car_flags;
1842 hai = hai_first(hal);
1843 memcpy(hai, car->car_hai, car->car_hai->hai_len);
1844 hai->hai_action = HSMA_CANCEL;
1847 /* it is possible to safely call mdt_hsm_agent_send()
1848 * (ie without a deadlock on cdt_request_lock), because the
1849 * write lock is taken only if we are not in purge mode
1850 * (mdt_hsm_agent_send() does not call mdt_cdt_add_request()
1851 * nor mdt_cdt_remove_request())
1853 /* no conflict with cdt thread because cdt is disable and we
1854 * have the request lock */
1855 mdt_hsm_agent_send(mti, hal, 1);
1857 mdt_cdt_put_request(car);
1859 up_read(&cdt->cdt_request_lock);
1862 OBD_FREE(hal, hal_sz);
1864 /* cancel all on-disk records */
1867 rc = cdt_llog_process(mti->mti_env, mti->mti_mdt, mdt_cancel_all_cb,
1868 &hcad, 0, 0, WRITE);
1870 /* Enable coordinator, unless the coordinator was stopping. */
1871 set_cdt_state_locked(cdt, old_state);
1872 out_cdt_state_unlock:
1873 mutex_unlock(&cdt->cdt_state_lock);
1875 lu_context_exit(&session);
1876 lu_context_fini(&session);
1884 * check if a request is compatible with file status
1885 * \param hai [IN] request description
1886 * \param archive_id [IN] request archive id
1887 * \param rq_flags [IN] request flags
1888 * \param hsm [IN] file HSM metadata
1891 bool mdt_hsm_is_action_compat(const struct hsm_action_item *hai,
1892 u32 archive_id, u64 rq_flags,
1893 const struct md_hsm *hsm)
1895 int is_compat = false;
1899 hsm_flags = hsm->mh_flags;
1900 switch (hai->hai_action) {
1902 if (!(hsm_flags & HS_NOARCHIVE) &&
1903 (hsm_flags & HS_DIRTY || !(hsm_flags & HS_ARCHIVED)))
1906 if (hsm_flags & HS_EXISTS &&
1908 archive_id != hsm->mh_arch_id)
1913 if (!(hsm_flags & HS_DIRTY) && (hsm_flags & HS_RELEASED) &&
1914 hsm_flags & HS_ARCHIVED && !(hsm_flags & HS_LOST))
1918 if (!(hsm_flags & HS_RELEASED) &&
1919 (hsm_flags & (HS_ARCHIVED | HS_EXISTS)))
1926 CDEBUG(D_HSM, "fid="DFID" action=%s flags=%#llx"
1927 " extent=%#llx-%#llx hsm_flags=%.8X %s\n",
1928 PFID(&hai->hai_fid),
1929 hsm_copytool_action2name(hai->hai_action), rq_flags,
1930 hai->hai_extent.offset, hai->hai_extent.length,
1932 (is_compat ? "compatible" : "uncompatible"));
1938 * /proc interface used to get/set HSM behaviour (cdt->cdt_policy)
1940 static const struct {
1944 } hsm_policy_names[] = {
1945 { CDT_NONBLOCKING_RESTORE, "NonBlockingRestore", "NBR"},
1946 { CDT_NORETRY_ACTION, "NoRetryAction", "NRA"},
1951 * convert a policy name to a bit
1952 * \param name [IN] policy name
1954 * \retval policy bit
1956 static __u64 hsm_policy_str2bit(const char *name)
1960 for (i = 0; hsm_policy_names[i].bit != 0; i++)
1961 if (strcmp(hsm_policy_names[i].nickname, name) == 0 ||
1962 strcmp(hsm_policy_names[i].name, name) == 0)
1963 return hsm_policy_names[i].bit;
1968 * convert a policy bit field to a string
1969 * \param mask [IN] policy bit field
1970 * \param hexa [IN] print mask before bit names
1971 * \param buffer [OUT] string
1972 * \param count [IN] size of buffer
1974 static void hsm_policy_bit2str(struct seq_file *m, const __u64 mask,
1982 seq_printf(m, "(%#llx) ", mask);
1984 for (i = 0; i < CDT_POLICY_SHIFT_COUNT; i++) {
1987 for (j = 0; hsm_policy_names[j].bit != 0; j++) {
1988 if (hsm_policy_names[j].bit == bit)
1992 seq_printf(m, "[%s] ", hsm_policy_names[j].name);
1994 seq_printf(m, "%s ", hsm_policy_names[j].name);
1996 /* remove last ' ' */
2001 /* methods to read/write HSM policy flags */
2002 static int mdt_hsm_policy_seq_show(struct seq_file *m, void *data)
2004 struct mdt_device *mdt = m->private;
2005 struct coordinator *cdt = &mdt->mdt_coordinator;
2008 hsm_policy_bit2str(m, cdt->cdt_policy, false);
2013 mdt_hsm_policy_seq_write(struct file *file, const char __user *buffer,
2014 size_t count, loff_t *off)
2016 struct seq_file *m = file->private_data;
2017 struct mdt_device *mdt = m->private;
2018 struct coordinator *cdt = &mdt->mdt_coordinator;
2019 char *start, *token, sign;
2022 __u64 add_mask, remove_mask, set_mask;
2026 if (count + 1 > PAGE_SIZE)
2029 OBD_ALLOC(buf, count + 1);
2033 if (copy_from_user(buf, buffer, count))
2034 GOTO(out, rc = -EFAULT);
2039 CDEBUG(D_HSM, "%s: receive new policy: '%s'\n", mdt_obd_name(mdt),
2042 add_mask = remove_mask = set_mask = 0;
2044 token = strsep(&start, "\n ");
2050 if (sign == '-' || sign == '+')
2053 policy = hsm_policy_str2bit(token);
2055 CWARN("%s: '%s' is unknown, "
2056 "supported policies are:\n", mdt_obd_name(mdt),
2058 hsm_policy_bit2str(m, 0, false);
2059 GOTO(out, rc = -EINVAL);
2063 remove_mask |= policy;
2073 } while (start != NULL);
2075 CDEBUG(D_HSM, "%s: new policy: rm=%#llx add=%#llx set=%#llx\n",
2076 mdt_obd_name(mdt), remove_mask, add_mask, set_mask);
2078 /* if no sign in all string, it is a clear and set
2079 * if some sign found, all unsigned are converted
2081 * P1 P2 = set to P1 and P2
2082 * P1 -P2 = add P1 clear P2 same as +P1 -P2
2084 if (remove_mask == 0 && add_mask == 0) {
2085 cdt->cdt_policy = set_mask;
2087 cdt->cdt_policy |= set_mask | add_mask;
2088 cdt->cdt_policy &= ~remove_mask;
2091 GOTO(out, rc = count);
2094 OBD_FREE(buf, count + 1);
2097 LPROC_SEQ_FOPS(mdt_hsm_policy);
2099 #define GENERATE_PROC_METHOD(VAR) \
2100 static int mdt_hsm_##VAR##_seq_show(struct seq_file *m, void *data) \
2102 struct mdt_device *mdt = m->private; \
2103 struct coordinator *cdt = &mdt->mdt_coordinator; \
2106 seq_printf(m, "%llu\n", (__u64)cdt->VAR); \
2110 mdt_hsm_##VAR##_seq_write(struct file *file, const char __user *buffer, \
2111 size_t count, loff_t *off) \
2114 struct seq_file *m = file->private_data; \
2115 struct mdt_device *mdt = m->private; \
2116 struct coordinator *cdt = &mdt->mdt_coordinator; \
2121 rc = kstrtouint_from_user(buffer, count, 0, &val); \
2132 GENERATE_PROC_METHOD(cdt_loop_period)
2133 GENERATE_PROC_METHOD(cdt_grace_delay)
2134 GENERATE_PROC_METHOD(cdt_active_req_timeout)
2135 GENERATE_PROC_METHOD(cdt_max_requests)
2136 GENERATE_PROC_METHOD(cdt_default_archive_id)
2139 * procfs write method for MDT/hsm_control
2140 * proc entry is in mdt directory so data is mdt obd_device pointer
2142 #define CDT_ENABLE_CMD "enabled"
2143 #define CDT_STOP_CMD "shutdown"
2144 #define CDT_DISABLE_CMD "disabled"
2145 #define CDT_PURGE_CMD "purge"
2146 #define CDT_HELP_CMD "help"
2147 #define CDT_MAX_CMD_LEN 10
2150 mdt_hsm_cdt_control_seq_write(struct file *file, const char __user *buffer,
2151 size_t count, loff_t *off)
2153 struct seq_file *m = file->private_data;
2154 struct obd_device *obd = m->private;
2155 struct mdt_device *mdt = mdt_dev(obd->obd_lu_dev);
2156 struct coordinator *cdt = &(mdt->mdt_coordinator);
2158 char kernbuf[CDT_MAX_CMD_LEN];
2161 if (count == 0 || count >= sizeof(kernbuf))
2164 if (copy_from_user(kernbuf, buffer, count))
2168 if (kernbuf[count - 1] == '\n')
2169 kernbuf[count - 1] = 0;
2172 if (strcmp(kernbuf, CDT_ENABLE_CMD) == 0) {
2173 if (cdt->cdt_state == CDT_DISABLE) {
2174 rc = set_cdt_state(cdt, CDT_RUNNING);
2175 mdt_hsm_cdt_event(cdt);
2176 wake_up(&cdt->cdt_waitq);
2178 rc = mdt_hsm_cdt_start(mdt);
2180 } else if (strcmp(kernbuf, CDT_STOP_CMD) == 0) {
2181 if ((cdt->cdt_state == CDT_STOPPING) ||
2182 (cdt->cdt_state == CDT_STOPPED)) {
2183 CERROR("%s: Coordinator already stopped\n",
2187 rc = mdt_hsm_cdt_stop(mdt);
2189 } else if (strcmp(kernbuf, CDT_DISABLE_CMD) == 0) {
2190 if ((cdt->cdt_state == CDT_STOPPING) ||
2191 (cdt->cdt_state == CDT_STOPPED)) {
2192 CERROR("%s: Coordinator is stopped\n",
2196 rc = set_cdt_state(cdt, CDT_DISABLE);
2198 } else if (strcmp(kernbuf, CDT_PURGE_CMD) == 0) {
2199 rc = hsm_cancel_all_actions(mdt);
2200 } else if (strcmp(kernbuf, CDT_HELP_CMD) == 0) {
2208 CERROR("%s: Valid coordinator control commands are: "
2209 "%s %s %s %s %s\n", mdt_obd_name(mdt),
2210 CDT_ENABLE_CMD, CDT_STOP_CMD, CDT_DISABLE_CMD,
2211 CDT_PURGE_CMD, CDT_HELP_CMD);
2219 int mdt_hsm_cdt_control_seq_show(struct seq_file *m, void *data)
2221 struct obd_device *obd = m->private;
2222 struct coordinator *cdt;
2225 cdt = &(mdt_dev(obd->obd_lu_dev)->mdt_coordinator);
2227 seq_printf(m, "%s\n", cdt_mdt_state2str(cdt->cdt_state));
2233 mdt_hsm_request_mask_show(struct seq_file *m, __u64 mask)
2239 for (i = 0; i < 8 * sizeof(mask); i++) {
2240 if (mask & (1UL << i)) {
2241 seq_printf(m, "%s%s", first ? "" : " ",
2242 hsm_copytool_action2name(i));
2252 mdt_hsm_user_request_mask_seq_show(struct seq_file *m, void *data)
2254 struct mdt_device *mdt = m->private;
2255 struct coordinator *cdt = &mdt->mdt_coordinator;
2257 return mdt_hsm_request_mask_show(m, cdt->cdt_user_request_mask);
2261 mdt_hsm_group_request_mask_seq_show(struct seq_file *m, void *data)
2263 struct mdt_device *mdt = m->private;
2264 struct coordinator *cdt = &mdt->mdt_coordinator;
2266 return mdt_hsm_request_mask_show(m, cdt->cdt_group_request_mask);
2270 mdt_hsm_other_request_mask_seq_show(struct seq_file *m, void *data)
2272 struct mdt_device *mdt = m->private;
2273 struct coordinator *cdt = &mdt->mdt_coordinator;
2275 return mdt_hsm_request_mask_show(m, cdt->cdt_other_request_mask);
2278 static inline enum hsm_copytool_action
2279 hsm_copytool_name2action(const char *name)
2281 if (strcasecmp(name, "NOOP") == 0)
2283 else if (strcasecmp(name, "ARCHIVE") == 0)
2284 return HSMA_ARCHIVE;
2285 else if (strcasecmp(name, "RESTORE") == 0)
2286 return HSMA_RESTORE;
2287 else if (strcasecmp(name, "REMOVE") == 0)
2289 else if (strcasecmp(name, "CANCEL") == 0)
2296 mdt_write_hsm_request_mask(struct file *file, const char __user *user_buf,
2297 size_t user_count, __u64 *mask)
2299 char *buf, *pos, *name;
2305 if (!(user_count < 4096))
2308 buf_size = user_count + 1;
2310 OBD_ALLOC(buf, buf_size);
2314 if (copy_from_user(buf, user_buf, buf_size - 1))
2315 GOTO(out, rc = -EFAULT);
2317 buf[buf_size - 1] = '\0';
2320 while ((name = strsep(&pos, " \t\v\n")) != NULL) {
2326 action = hsm_copytool_name2action(name);
2328 GOTO(out, rc = -EINVAL);
2330 new_mask |= (1UL << action);
2336 OBD_FREE(buf, buf_size);
2342 mdt_hsm_user_request_mask_seq_write(struct file *file, const char __user *buf,
2343 size_t count, loff_t *off)
2345 struct seq_file *m = file->private_data;
2346 struct mdt_device *mdt = m->private;
2347 struct coordinator *cdt = &mdt->mdt_coordinator;
2349 return mdt_write_hsm_request_mask(file, buf, count,
2350 &cdt->cdt_user_request_mask);
2354 mdt_hsm_group_request_mask_seq_write(struct file *file, const char __user *buf,
2355 size_t count, loff_t *off)
2357 struct seq_file *m = file->private_data;
2358 struct mdt_device *mdt = m->private;
2359 struct coordinator *cdt = &mdt->mdt_coordinator;
2361 return mdt_write_hsm_request_mask(file, buf, count,
2362 &cdt->cdt_group_request_mask);
2366 mdt_hsm_other_request_mask_seq_write(struct file *file, const char __user *buf,
2367 size_t count, loff_t *off)
2369 struct seq_file *m = file->private_data;
2370 struct mdt_device *mdt = m->private;
2371 struct coordinator *cdt = &mdt->mdt_coordinator;
2373 return mdt_write_hsm_request_mask(file, buf, count,
2374 &cdt->cdt_other_request_mask);
2377 static int mdt_hsm_cdt_raolu_seq_show(struct seq_file *m, void *data)
2379 struct mdt_device *mdt = m->private;
2380 struct coordinator *cdt = &mdt->mdt_coordinator;
2383 seq_printf(m, "%d\n", (int)cdt->cdt_remove_archive_on_last_unlink);
2388 mdt_hsm_cdt_raolu_seq_write(struct file *file, const char __user *buffer,
2389 size_t count, loff_t *off)
2392 struct seq_file *m = file->private_data;
2393 struct mdt_device *mdt = m->private;
2394 struct coordinator *cdt = &mdt->mdt_coordinator;
2399 rc = kstrtobool_from_user(buffer, count, &val);
2403 cdt->cdt_remove_archive_on_last_unlink = val;
2407 LPROC_SEQ_FOPS(mdt_hsm_cdt_loop_period);
2408 LPROC_SEQ_FOPS(mdt_hsm_cdt_grace_delay);
2409 LPROC_SEQ_FOPS(mdt_hsm_cdt_active_req_timeout);
2410 LPROC_SEQ_FOPS(mdt_hsm_cdt_max_requests);
2411 LPROC_SEQ_FOPS(mdt_hsm_cdt_default_archive_id);
2412 LPROC_SEQ_FOPS(mdt_hsm_user_request_mask);
2413 LPROC_SEQ_FOPS(mdt_hsm_group_request_mask);
2414 LPROC_SEQ_FOPS(mdt_hsm_other_request_mask);
2415 LPROC_SEQ_FOPS(mdt_hsm_cdt_raolu);
2417 /* Read-only proc files for request counters */
2418 static int mdt_hsm_cdt_archive_count_seq_show(struct seq_file *m, void *data)
2420 struct mdt_device *mdt = m->private;
2421 struct coordinator *cdt = &mdt->mdt_coordinator;
2424 seq_printf(m, "%d\n", atomic_read(&cdt->cdt_archive_count));
2428 static int mdt_hsm_cdt_restore_count_seq_show(struct seq_file *m, void *data)
2430 struct mdt_device *mdt = m->private;
2431 struct coordinator *cdt = &mdt->mdt_coordinator;
2434 seq_printf(m, "%d\n", atomic_read(&cdt->cdt_restore_count));
2438 static int mdt_hsm_cdt_remove_count_seq_show(struct seq_file *m, void *data)
2440 struct mdt_device *mdt = m->private;
2441 struct coordinator *cdt = &mdt->mdt_coordinator;
2444 seq_printf(m, "%d\n", atomic_read(&cdt->cdt_remove_count));
2448 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_archive_count);
2449 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_restore_count);
2450 LPROC_SEQ_FOPS_RO(mdt_hsm_cdt_remove_count);
2452 static struct lprocfs_vars lprocfs_mdt_hsm_vars[] = {
2454 .fops = &mdt_hsm_agent_fops },
2455 { .name = "actions",
2456 .fops = &mdt_hsm_actions_fops,
2457 .proc_mode = 0444 },
2458 { .name = "default_archive_id",
2459 .fops = &mdt_hsm_cdt_default_archive_id_fops },
2460 { .name = "grace_delay",
2461 .fops = &mdt_hsm_cdt_grace_delay_fops },
2462 { .name = "loop_period",
2463 .fops = &mdt_hsm_cdt_loop_period_fops },
2464 { .name = "max_requests",
2465 .fops = &mdt_hsm_cdt_max_requests_fops },
2467 .fops = &mdt_hsm_policy_fops },
2468 { .name = "active_request_timeout",
2469 .fops = &mdt_hsm_cdt_active_req_timeout_fops },
2470 { .name = "active_requests",
2471 .fops = &mdt_hsm_active_requests_fops },
2472 { .name = "user_request_mask",
2473 .fops = &mdt_hsm_user_request_mask_fops, },
2474 { .name = "group_request_mask",
2475 .fops = &mdt_hsm_group_request_mask_fops, },
2476 { .name = "other_request_mask",
2477 .fops = &mdt_hsm_other_request_mask_fops, },
2478 { .name = "remove_archive_on_last_unlink",
2479 .fops = &mdt_hsm_cdt_raolu_fops, },
2480 { .name = "archive_count",
2481 .fops = &mdt_hsm_cdt_archive_count_fops, },
2482 { .name = "restore_count",
2483 .fops = &mdt_hsm_cdt_restore_count_fops, },
2484 { .name = "remove_count",
2485 .fops = &mdt_hsm_cdt_remove_count_fops, },