4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
31 * lustre/osp/osp_dev.c
33 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
34 * Author: Mikhail Pershin <mike.pershin@intel.com>
35 * Author: Di Wang <di.wang@intel.com>
38 * The Object Storage Proxy (OSP) module provides an implementation of
39 * the DT API for remote MDTs and OSTs. Every local OSP device (or
40 * object) is a proxy for a remote OSD device (or object). Thus OSP
41 * converts DT operations into RPCs, which are sent to the OUT service
42 * on a remote target, converted back to DT operations, and
43 * executed. Of course there are many ways in which this description
44 * is inaccurate but it's a good enough mental model. OSP is used by
45 * the MDT stack in several ways:
47 * - OSP devices allocate FIDs for the stripe sub-objects of a striped
50 * - OSP objects represent the remote MDT and OST objects that are
51 * the stripes of a striped object.
53 * - OSP devices log, send, and track synchronous operations (setattr
54 * and unlink) to remote targets.
56 * - OSP objects are the bottom slice of the compound LU object
57 * representing a remote MDT object: MDT/MDD/LOD/OSP.
59 * - OSP objects are used by LFSCK to represent remote OST objects
60 * during the verification of MDT-OST consistency.
62 * - OSP devices batch idempotent requests (declare_attr_get() and
63 * declare_xattr_get()) to the remote target and cache their results.
65 * In addition the OSP layer implements a subset of the OBD device API
66 * to support being a client of a remote target, connecting to other
67 * layers, and FID allocation.
70 #define DEBUG_SUBSYSTEM S_MDS
72 #include <linux/kthread.h>
74 #include <uapi/linux/lustre/lustre_ioctl.h>
75 #include <lustre_log.h>
76 #include <lustre_obdo.h>
77 #include <uapi/linux/lustre/lustre_param.h>
78 #include <obd_class.h>
80 #include "osp_internal.h"
82 /* Slab for OSP object allocation */
83 struct kmem_cache *osp_object_kmem;
85 static struct lu_kmem_descr osp_caches[] = {
87 .ckd_cache = &osp_object_kmem,
88 .ckd_name = "osp_obj",
89 .ckd_size = sizeof(struct osp_object)
97 * Implementation of lu_device_operations::ldo_object_alloc
99 * Allocates an OSP object in memory, whose FID is on the remote target.
101 * \param[in] env execution environment
102 * \param[in] hdr The header of the object stack. If it is NULL, it
103 * means the object is not built from top device, i.e.
104 * it is a sub-stripe object of striped directory or
106 * \param[in] d OSP device
108 * \retval object object being created if the creation succeed.
109 * \retval NULL NULL if the creation failed.
111 static struct lu_object *osp_object_alloc(const struct lu_env *env,
112 const struct lu_object_header *hdr,
115 struct osp_object *o;
117 OBD_SLAB_ALLOC_PTR_GFP(o, osp_object_kmem, GFP_NOFS);
119 struct lu_object *l = &o->opo_obj.do_lu;
121 /* If hdr is NULL, it means the object is not built
122 * from the top dev(MDT/OST), usually it happens when
123 * building striped object, like data object on MDT or
124 * striped object for directory */
126 struct lu_object_header *h = &o->opo_header;
128 lu_object_header_init(h);
129 dt_object_init(&o->opo_obj, h, d);
130 lu_object_add_top(h, l);
132 dt_object_init(&o->opo_obj, NULL, d);
135 l->lo_ops = &osp_lu_obj_ops;
137 init_rwsem(&o->opo_sem);
138 INIT_LIST_HEAD(&o->opo_xattr_list);
139 INIT_LIST_HEAD(&o->opo_invalidate_cb_list);
140 spin_lock_init(&o->opo_lock);
141 init_rwsem(&o->opo_invalidate_sem);
150 * Find or create the local object
152 * Finds or creates the local file referenced by \a reg_id and return the
153 * attributes of the local file.
155 * \param[in] env execution environment
156 * \param[in] osp OSP device
157 * \param[out] attr attributes of the object
158 * \param[in] reg_id the local object ID of the file. It will be used
159 * to compose a local FID{FID_SEQ_LOCAL_FILE, reg_id, 0}
160 * to identify the object.
162 * \retval object object(dt_object) found or created
163 * \retval ERR_PTR(errno) ERR_PTR(errno) if not get the object.
165 static struct dt_object
166 *osp_find_or_create_local_file(const struct lu_env *env, struct osp_device *osp,
167 struct lu_attr *attr, __u32 reg_id)
169 struct osp_thread_info *osi = osp_env_info(env);
170 struct dt_object_format dof = { 0 };
171 struct dt_object *dto;
175 lu_local_obj_fid(&osi->osi_fid, reg_id);
176 attr->la_valid = LA_MODE;
177 attr->la_mode = S_IFREG | 0644;
178 dof.dof_type = DFT_REGULAR;
179 /* Find or create the local object by osi_fid. */
180 dto = dt_find_or_create(env, osp->opd_storage, &osi->osi_fid,
185 /* Get attributes of the local object. */
186 rc = dt_attr_get(env, dto, attr);
188 CERROR("%s: can't be initialized: rc = %d\n",
189 osp->opd_obd->obd_name, rc);
190 dt_object_put(env, dto);
197 * Write data buffer to a local file object.
199 * \param[in] env execution environment
200 * \param[in] osp OSP device
201 * \param[in] dt_obj object written to
202 * \param[in] buf buffer containing byte array and length
203 * \param[in] offset write offset in the object in bytes
205 * \retval 0 0 if write succeed
206 * \retval -EFAULT -EFAULT if only part of buffer is written.
207 * \retval negative other negative errno if write failed.
209 static int osp_write_local_file(const struct lu_env *env,
210 struct osp_device *osp,
211 struct dt_object *dt_obj,
218 if (osp->opd_storage->dd_rdonly)
221 th = dt_trans_create(env, osp->opd_storage);
225 rc = dt_declare_record_write(env, dt_obj, buf, offset, th);
228 rc = dt_trans_start_local(env, osp->opd_storage, th);
232 rc = dt_record_write(env, dt_obj, buf, &offset, th);
234 dt_trans_stop(env, osp->opd_storage, th);
239 * Initialize last ID object.
241 * This function initializes the LAST_ID file, which stores the current last
242 * used id of data objects. The MDT will use the last used id and the last_seq
243 * (\see osp_init_last_seq()) to synchronize the precreate object cache with
246 * \param[in] env execution environment
247 * \param[in] osp OSP device
249 * \retval 0 0 if initialization succeed
250 * \retval negative negative errno if initialization failed
252 static int osp_init_last_objid(const struct lu_env *env, struct osp_device *osp)
254 struct osp_thread_info *osi = osp_env_info(env);
255 struct lu_fid *fid = &osp->opd_last_used_fid;
256 struct dt_object *dto;
260 dto = osp_find_or_create_local_file(env, osp, &osi->osi_attr,
263 RETURN(PTR_ERR(dto));
265 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &osp->opd_last_id,
268 /* object will be released in device cleanup path */
269 if (osi->osi_attr.la_size >= (osi->osi_off + osi->osi_lb.lb_len)) {
270 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
271 if (rc != 0 && rc != -EFAULT)
273 /* In case of idif bits 32-48 go to f_seq
274 * (see osp_init_last_seq). So don't care
275 * about u64->u32 convertion. */
276 fid->f_oid = osp->opd_last_id;
279 if (rc == -EFAULT) { /* fresh LAST_ID */
280 osp->opd_last_id = 0;
282 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
287 osp->opd_last_used_oid_file = dto;
290 /* object will be released in device cleanup path */
291 CERROR("%s: can't initialize lov_objid: rc = %d\n",
292 osp->opd_obd->obd_name, rc);
293 dt_object_put(env, dto);
294 osp->opd_last_used_oid_file = NULL;
299 * Initialize last sequence object.
301 * This function initializes the LAST_SEQ file in the local OSD, which stores
302 * the current last used sequence of data objects. The MDT will use the last
303 * sequence and last id (\see osp_init_last_objid()) to synchronize the
304 * precreate object cache with OSTs.
306 * \param[in] env execution environment
307 * \param[in] osp OSP device
309 * \retval 0 0 if initialization succeed
310 * \retval negative negative errno if initialization failed
312 static int osp_init_last_seq(const struct lu_env *env, struct osp_device *osp)
314 struct osp_thread_info *osi = osp_env_info(env);
315 struct lu_fid *fid = &osp->opd_last_used_fid;
316 struct dt_object *dto;
320 dto = osp_find_or_create_local_file(env, osp, &osi->osi_attr,
323 RETURN(PTR_ERR(dto));
325 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
328 /* object will be released in device cleanup path */
329 if (osi->osi_attr.la_size >= (osi->osi_off + osi->osi_lb.lb_len)) {
330 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
331 if (rc != 0 && rc != -EFAULT)
333 if (fid_is_idif(fid))
334 fid->f_seq = fid_idif_seq(osp->opd_last_id,
338 if (rc == -EFAULT) { /* fresh OSP */
340 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
345 osp->opd_last_used_seq_file = dto;
348 /* object will be released in device cleanup path */
349 CERROR("%s: can't initialize lov_seq: rc = %d\n",
350 osp->opd_obd->obd_name, rc);
351 dt_object_put(env, dto);
352 osp->opd_last_used_seq_file = NULL;
357 * Initialize last OID and sequence object.
359 * If the MDT is just upgraded to 2.4 from the lower version, where the
360 * LAST_SEQ file does not exist, the file will be created and IDIF sequence
361 * will be written into the file.
363 * \param[in] env execution environment
364 * \param[in] osp OSP device
366 * \retval 0 0 if initialization succeed
367 * \retval negative negative error if initialization failed
369 static int osp_last_used_init(const struct lu_env *env, struct osp_device *osp)
371 struct osp_thread_info *osi = osp_env_info(env);
375 fid_zero(&osp->opd_last_used_fid);
376 rc = osp_init_last_objid(env, osp);
378 CERROR("%s: Can not get ids %d from old objid!\n",
379 osp->opd_obd->obd_name, rc);
383 rc = osp_init_last_seq(env, osp);
385 CERROR("%s: Can not get sequence %d from old objseq!\n",
386 osp->opd_obd->obd_name, rc);
390 if (fid_oid(&osp->opd_last_used_fid) != 0 &&
391 fid_seq(&osp->opd_last_used_fid) == 0) {
392 /* Just upgrade from the old version,
393 * set the seq to be IDIF */
394 osp->opd_last_used_fid.f_seq =
395 fid_idif_seq(fid_oid(&osp->opd_last_used_fid),
397 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off,
398 &osp->opd_last_used_fid.f_seq,
400 rc = osp_write_local_file(env, osp, osp->opd_last_used_seq_file,
401 &osi->osi_lb, osi->osi_off);
403 CERROR("%s : Can not write seq file: rc = %d\n",
404 osp->opd_obd->obd_name, rc);
409 if (!fid_is_zero(&osp->opd_last_used_fid) &&
410 !fid_is_sane(&osp->opd_last_used_fid)) {
411 CERROR("%s: Got invalid FID "DFID"\n", osp->opd_obd->obd_name,
412 PFID(&osp->opd_last_used_fid));
413 GOTO(out, rc = -EINVAL);
416 osp_fid_to_obdid(&osp->opd_last_used_fid, &osp->opd_last_id);
417 CDEBUG(D_INFO, "%s: Init last used fid "DFID"\n",
418 osp->opd_obd->obd_name, PFID(&osp->opd_last_used_fid));
421 if (osp->opd_last_used_oid_file != NULL) {
422 dt_object_put(env, osp->opd_last_used_oid_file);
423 osp->opd_last_used_oid_file = NULL;
425 if (osp->opd_last_used_seq_file != NULL) {
426 dt_object_put(env, osp->opd_last_used_seq_file);
427 osp->opd_last_used_seq_file = NULL;
435 * Release the last sequence and OID file objects in OSP device.
437 * \param[in] env execution environment
438 * \param[in] osp OSP device
440 static void osp_last_used_fini(const struct lu_env *env, struct osp_device *osp)
442 /* release last_used file */
443 if (osp->opd_last_used_oid_file != NULL) {
444 dt_object_put(env, osp->opd_last_used_oid_file);
445 osp->opd_last_used_oid_file = NULL;
448 if (osp->opd_last_used_seq_file != NULL) {
449 dt_object_put(env, osp->opd_last_used_seq_file);
450 osp->opd_last_used_seq_file = NULL;
455 * Disconnects the connection between OSP and its correspondent MDT or OST, and
456 * the import will be marked as inactive. It will only be called during OSP
459 * \param[in] d OSP device being disconnected
461 * \retval 0 0 if disconnection succeed
462 * \retval negative negative errno if disconnection failed
464 static int osp_disconnect(struct osp_device *d)
466 struct obd_device *obd = d->opd_obd;
467 struct obd_import *imp;
470 imp = obd->u.cli.cl_import;
472 /* Mark import deactivated now, so we don't try to reconnect if any
473 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
474 * fully deactivate the import, or that would drop all requests. */
475 LASSERT(imp != NULL);
476 spin_lock(&imp->imp_lock);
477 imp->imp_deactive = 1;
478 spin_unlock(&imp->imp_lock);
480 ptlrpc_deactivate_import(imp);
482 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
483 * delete it regardless. (It's safe to delete an import that was
485 (void)ptlrpc_pinger_del_import(imp);
487 /* Send disconnect on healthy import, do force disconnect otherwise */
488 spin_lock(&imp->imp_lock);
489 imp->imp_obd->obd_force = imp->imp_state != LUSTRE_IMP_FULL;
490 spin_unlock(&imp->imp_lock);
492 rc = ptlrpc_disconnect_import(imp, 0);
494 CERROR("%s: can't disconnect: rc = %d\n", obd->obd_name, rc);
496 ptlrpc_invalidate_import(imp);
502 * Initialize the osp_update structure in OSP device
504 * Allocate osp update structure and start update thread.
506 * \param[in] osp OSP device
508 * \retval 0 if initialization succeeds.
509 * \retval negative errno if initialization fails.
511 static int osp_update_init(struct osp_device *osp)
513 struct task_struct *task;
518 LASSERT(osp->opd_connect_mdt);
520 if (osp->opd_storage->dd_rdonly)
523 OBD_ALLOC_PTR(osp->opd_update);
524 if (osp->opd_update == NULL)
527 init_waitqueue_head(&osp->opd_update->ou_waitq);
528 spin_lock_init(&osp->opd_update->ou_lock);
529 INIT_LIST_HEAD(&osp->opd_update->ou_list);
530 osp->opd_update->ou_rpc_version = 1;
531 osp->opd_update->ou_version = 1;
532 osp->opd_update->ou_generation = 0;
534 rc = lu_env_init(&osp->opd_update->ou_env,
535 osp->opd_dt_dev.dd_lu_dev.ld_type->ldt_ctx_tags);
537 CERROR("%s: init env error: rc = %d\n", osp->opd_obd->obd_name,
539 OBD_FREE_PTR(osp->opd_update);
540 osp->opd_update = NULL;
543 /* start thread handling sending updates to the remote MDT */
544 task = kthread_create(osp_send_update_thread, osp,
545 "osp_up%u-%u", osp->opd_index, osp->opd_group);
547 int rc = PTR_ERR(task);
549 lu_env_fini(&osp->opd_update->ou_env);
550 OBD_FREE_PTR(osp->opd_update);
551 osp->opd_update = NULL;
552 CERROR("%s: can't start precreate thread: rc = %d\n",
553 osp->opd_obd->obd_name, rc);
557 osp->opd_update->ou_update_task = task;
558 wake_up_process(task);
564 * Finialize osp_update structure in OSP device
566 * Stop the OSP update sending thread, then delete the left
567 * osp thandle in the sending list.
569 * \param [in] osp OSP device.
571 static void osp_update_fini(const struct lu_env *env, struct osp_device *osp)
573 struct obd_import *imp = osp->opd_obd->u.cli.cl_import;
574 struct osp_update_request *our;
575 struct osp_update_request *tmp;
576 struct osp_updates *ou = osp->opd_update;
581 kthread_stop(ou->ou_update_task);
582 lu_env_fini(&ou->ou_env);
585 * import invalidation can be running in a dedicated thread.
586 * we have to wait for the thread's completion as the thread
587 * invalidates this list as well.
589 wait_event_idle(imp->imp_recovery_waitq,
590 (atomic_read(&imp->imp_inval_count) == 0));
592 /* Remove the left osp thandle from the list */
593 list_for_each_entry_safe(our, tmp, &ou->ou_list, our_list) {
594 list_del_init(&our->our_list);
595 LASSERT(our->our_th != NULL);
596 osp_trans_callback(env, our->our_th, -EIO);
597 /* our will be destroyed in osp_thandle_put() */
598 osp_thandle_put(env, our->our_th);
602 osp->opd_update = NULL;
606 * Cleanup OSP, which includes disconnect import, cleanup unlink log, stop
607 * precreate threads etc.
609 * \param[in] env execution environment.
610 * \param[in] d OSP device being disconnected.
612 * \retval 0 0 if cleanup succeed
613 * \retval negative negative errno if cleanup failed
615 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
622 rc = osp_disconnect(d);
626 if (!d->opd_connect_mdt) {
627 /* stop sync thread */
630 /* stop precreate thread */
631 osp_precreate_fini(d);
633 /* release last_used file */
634 osp_last_used_fini(env, d);
637 obd_fid_fini(d->opd_obd);
643 * Implementation of osp_lu_ops::ldo_process_config
645 * This function processes config log records in OSP layer. It is usually
646 * called from the top layer of MDT stack, and goes through the stack by calling
647 * ldo_process_config of next layer.
649 * \param[in] env execution environment
650 * \param[in] dev lu_device of OSP
651 * \param[in] lcfg config log
653 * \retval 0 0 if the config log record is executed correctly.
654 * \retval negative negative errno if the record execution fails.
656 static int osp_process_config(const struct lu_env *env,
657 struct lu_device *dev, struct lustre_cfg *lcfg)
659 struct osp_device *d = lu2osp_dev(dev);
660 struct dt_device *dt = lu2dt_dev(dev);
661 struct obd_device *obd = d->opd_obd;
667 switch (lcfg->lcfg_command) {
668 case LCFG_PRE_CLEANUP:
669 rc = osp_disconnect(d);
670 osp_update_fini(env, d);
674 * cleanup ldlm so that PRE_CLEANUP phase doesn't block
675 * awaiting for locks held by MDT threads awaiting for
676 * all OSPs to interrupt their in-flight RPCs
678 if (obd->obd_namespace != NULL)
679 ldlm_namespace_free_prior(obd->obd_namespace, NULL, 1);
680 lu_dev_del_linkage(dev->ld_site, dev);
681 rc = osp_shutdown(env, d);
684 count = class_modify_config(lcfg, d->opd_connect_mdt ?
685 PARAM_OSP : PARAM_OSC,
688 /* class_modify_config() haven't found matching
689 * parameter and returned an error so that layer(s)
690 * below could use that. But OSP is the bottom, so
693 CERROR("%s: unknown param %s\n",
694 (char *)lustre_cfg_string(lcfg, 0),
695 (char *)lustre_cfg_string(lcfg, 1));
700 CERROR("%s: unknown command %u\n",
701 (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
710 * Implementation of osp_lu_ops::ldo_recovery_complete
712 * This function is called after recovery is finished, and OSP layer
713 * will wake up precreate thread here.
715 * \param[in] env execution environment
716 * \param[in] dev lu_device of OSP
718 * \retval 0 0 unconditionally
720 static int osp_recovery_complete(const struct lu_env *env,
721 struct lu_device *dev)
723 struct osp_device *osp = lu2osp_dev(dev);
726 osp->opd_recovery_completed = 1;
728 if (!osp->opd_connect_mdt && osp->opd_pre != NULL)
729 wake_up(&osp->opd_pre_waitq);
735 * Implementation of lu_device_operations::ldo_fid_alloc() for OSP
737 * Allocate FID from remote MDT.
739 * see include/lu_object.h for the details.
741 static int osp_fid_alloc(const struct lu_env *env, struct lu_device *d,
742 struct lu_fid *fid, struct lu_object *parent,
743 const struct lu_name *name)
745 struct osp_device *osp = lu2osp_dev(d);
746 struct client_obd *cli = &osp->opd_obd->u.cli;
747 struct lu_client_seq *seq = cli->cl_seq;
752 /* Sigh, fid client is not ready yet */
753 if (!osp->opd_obd->u.cli.cl_seq)
756 if (!osp->opd_obd->u.cli.cl_seq->lcs_exp)
759 rc = seq_client_alloc_fid(env, seq, fid);
764 const struct lu_device_operations osp_lu_ops = {
765 .ldo_object_alloc = osp_object_alloc,
766 .ldo_process_config = osp_process_config,
767 .ldo_recovery_complete = osp_recovery_complete,
768 .ldo_fid_alloc = osp_fid_alloc,
772 * Implementation of dt_device_operations::dt_statfs
774 * This function provides statfs status (for precreation) from
775 * corresponding OST. Note: this function only retrieves the status
776 * from the OSP device, and the real statfs RPC happens inside
777 * precreate thread (\see osp_statfs_update). Note: OSP for MDT does
778 * not need to retrieve statfs data for now.
780 * \param[in] env execution environment.
781 * \param[in] dev dt_device of OSP.
782 * \param[out] sfs holds the retrieved statfs data.
784 * \retval 0 0 statfs data was retrieved successfully or
785 * retrieval was not needed
786 * \retval negative negative errno if get statfs failed.
788 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
789 struct obd_statfs *sfs, struct obd_statfs_info *info)
791 struct osp_device *d = dt2osp_dev(dev);
792 struct obd_import *imp = d->opd_obd->u.cli.cl_import;
796 if (imp->imp_state == LUSTRE_IMP_CLOSED)
799 if (unlikely(d->opd_imp_active == 0))
802 /* return recently updated data */
803 *sfs = d->opd_statfs;
805 info->os_reserved_mb_low = d->opd_reserved_mb_low;
806 info->os_reserved_mb_high = d->opd_reserved_mb_high;
809 CDEBUG(D_OTHER, "%s: %llu blocks, %llu free, %llu avail, "
810 "%u bsize, %u reserved mb low, %u reserved mb high, "
811 "%llu files, %llu free files\n", d->opd_obd->obd_name,
812 sfs->os_blocks, sfs->os_bfree, sfs->os_bavail, sfs->os_bsize,
813 d->opd_reserved_mb_low, d->opd_reserved_mb_high,
814 sfs->os_files, sfs->os_ffree);
816 if (d->opd_pre == NULL || (info && !info->os_enable_pre))
820 * The layer above osp (usually lod) can use f_precreated to
821 * estimate how many objects are available for immediate usage.
823 spin_lock(&d->opd_pre_lock);
824 sfs->os_fprecreated = osp_fid_diff(&d->opd_pre_last_created_fid,
825 &d->opd_pre_used_fid);
826 sfs->os_fprecreated -= d->opd_pre_reserved;
827 LASSERTF(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2,
828 "last_created "DFID", next_fid "DFID", reserved %llu\n",
829 PFID(&d->opd_pre_last_created_fid), PFID(&d->opd_pre_used_fid),
830 d->opd_pre_reserved);
831 spin_unlock(&d->opd_pre_lock);
836 * Implementation of dt_device_operations::dt_sync
838 * This function synchronizes the OSP cache to the remote target. It wakes
839 * up unlink log threads and sends out unlink records to the remote OST.
841 * \param[in] env execution environment
842 * \param[in] dev dt_device of OSP
844 * \retval 0 0 if synchronization succeeds
845 * \retval negative negative errno if synchronization fails
847 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
849 struct osp_device *d = dt2osp_dev(dev);
850 time64_t start = ktime_get_seconds();
856 /* No Sync between MDTs yet. */
857 if (d->opd_connect_mdt)
860 recs = atomic_read(&d->opd_sync_changes);
861 old = atomic64_read(&d->opd_sync_processed_recs);
863 osp_sync_force(env, dt2osp_dev(dev));
865 if (unlikely(d->opd_imp_active == 0))
868 down_write(&d->opd_async_updates_rwsem);
870 CDEBUG(D_OTHER, "%s: async updates %d\n", d->opd_obd->obd_name,
871 atomic_read(&d->opd_async_updates_count));
873 /* make sure the connection is fine */
874 rc = wait_event_idle_timeout(
875 d->opd_sync_barrier_waitq,
876 atomic_read(&d->opd_async_updates_count) == 0,
877 cfs_time_seconds(obd_timeout));
883 up_write(&d->opd_async_updates_rwsem);
887 CDEBUG(D_CACHE, "%s: processed %llu\n", d->opd_obd->obd_name,
888 (unsigned long long)atomic64_read(&d->opd_sync_processed_recs));
890 while (atomic64_read(&d->opd_sync_processed_recs) < old + recs) {
891 __u64 last = atomic64_read(&d->opd_sync_processed_recs);
892 /* make sure the connection is fine */
893 wait_event_idle_timeout(
894 d->opd_sync_barrier_waitq,
895 atomic64_read(&d->opd_sync_processed_recs)
897 cfs_time_seconds(obd_timeout));
899 if (atomic64_read(&d->opd_sync_processed_recs) >= old + recs)
902 if (atomic64_read(&d->opd_sync_processed_recs) != last) {
903 /* some progress have been made,
908 /* no changes and expired, something is wrong */
909 GOTO(out, rc = -ETIMEDOUT);
912 /* block new processing (barrier>0 - few callers are possible */
913 atomic_inc(&d->opd_sync_barrier);
915 CDEBUG(D_CACHE, "%s: %u in flight\n", d->opd_obd->obd_name,
916 atomic_read(&d->opd_sync_rpcs_in_flight));
918 /* wait till all-in-flight are replied, so executed by the target */
919 /* XXX: this is used by LFSCK at the moment, which doesn't require
920 * all the changes to be committed, but in general it'd be
921 * better to wait till commit */
922 while (atomic_read(&d->opd_sync_rpcs_in_flight) > 0) {
923 old = atomic_read(&d->opd_sync_rpcs_in_flight);
925 wait_event_idle_timeout(
926 d->opd_sync_barrier_waitq,
927 atomic_read(&d->opd_sync_rpcs_in_flight) == 0,
928 cfs_time_seconds(obd_timeout));
930 if (atomic_read(&d->opd_sync_rpcs_in_flight) == 0)
933 if (atomic_read(&d->opd_sync_rpcs_in_flight) != old) {
934 /* some progress have been made */
938 /* no changes and expired, something is wrong */
939 GOTO(out, rc = -ETIMEDOUT);
943 /* resume normal processing (barrier=0) */
944 atomic_dec(&d->opd_sync_barrier);
945 osp_sync_check_for_work(d);
947 CDEBUG(D_CACHE, "%s: done in %lld: rc = %d\n", d->opd_obd->obd_name,
948 ktime_get_seconds() - start, rc);
953 static const struct dt_device_operations osp_dt_ops = {
954 .dt_statfs = osp_statfs,
956 .dt_trans_create = osp_trans_create,
957 .dt_trans_start = osp_trans_start,
958 .dt_trans_stop = osp_trans_stop,
959 .dt_trans_cb_add = osp_trans_cb_add,
963 * Connect OSP to local OSD.
965 * Locate the local OSD referenced by \a nextdev and connect to it. Sometimes,
966 * OSP needs to access the local OSD to store some information. For example,
967 * during precreate, it needs to update last used OID and sequence file
968 * (LAST_SEQ) in local OSD.
970 * \param[in] env execution environment
971 * \param[in] osp OSP device
972 * \param[in] nextdev the name of local OSD
974 * \retval 0 0 connection succeeded
975 * \retval negative negative errno connection failed
977 static int osp_connect_to_osd(const struct lu_env *env, struct osp_device *osp,
980 struct obd_connect_data *data = NULL;
981 struct obd_device *obd;
986 LASSERT(osp->opd_storage_exp == NULL);
992 obd = class_name2obd(nextdev);
994 CERROR("%s: can't locate next device: %s\n",
995 osp->opd_obd->obd_name, nextdev);
996 GOTO(out, rc = -ENOTCONN);
999 rc = obd_connect(env, &osp->opd_storage_exp, obd, &obd->obd_uuid, data,
1002 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
1003 osp->opd_obd->obd_name, nextdev, rc);
1007 osp->opd_dt_dev.dd_lu_dev.ld_site =
1008 osp->opd_storage_exp->exp_obd->obd_lu_dev->ld_site;
1009 LASSERT(osp->opd_dt_dev.dd_lu_dev.ld_site);
1010 osp->opd_storage = lu2dt_dev(osp->opd_storage_exp->exp_obd->obd_lu_dev);
1018 * Determine if the lock needs to be cancelled
1020 * Determine if the unused lock should be cancelled before replay, see
1021 * (ldlm_cancel_no_wait_policy()). Currently, only inode bits lock exists
1024 * \param[in] lock lock to be checked.
1026 * \retval 1 if the lock needs to be cancelled before replay.
1027 * \retval 0 if the lock does not need to be cancelled before
1030 static int osp_cancel_weight(struct ldlm_lock *lock)
1032 if (lock->l_resource->lr_type != LDLM_IBITS)
1039 * Initialize OSP device according to the parameters in the configuration
1042 * Reconstruct the local device name from the configuration profile, and
1043 * initialize necessary threads and structures according to the OSP type
1046 * Since there is no record in the MDT configuration for the local disk
1047 * device, we have to extract this from elsewhere in the profile.
1048 * The only information we get at setup is from the OSC records:
1049 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
1051 * Note: configs generated by Lustre 1.8 are missing the -MDTxxxx part,
1052 * so, we need to reconstruct the name of the underlying OSD from this:
1053 * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".
1055 * \param[in] env execution environment
1056 * \param[in] osp OSP device
1057 * \param[in] ldt lu device type of OSP
1058 * \param[in] cfg configuration log
1060 * \retval 0 0 if OSP initialization succeeded.
1061 * \retval negative negative errno if OSP initialization failed.
1063 static int osp_init0(const struct lu_env *env, struct osp_device *osp,
1064 struct lu_device_type *ldt, struct lustre_cfg *cfg)
1066 struct obd_device *obd;
1067 struct obd_import *imp;
1068 char *src, *tgt, *osdname = NULL;
1075 mutex_init(&osp->opd_async_requests_mutex);
1076 INIT_LIST_HEAD(&osp->opd_async_updates);
1077 init_rwsem(&osp->opd_async_updates_rwsem);
1078 atomic_set(&osp->opd_async_updates_count, 0);
1080 obd = class_name2obd(lustre_cfg_string(cfg, 0));
1082 CERROR("Cannot find obd with name %s\n",
1083 lustre_cfg_string(cfg, 0));
1088 src = lustre_cfg_string(cfg, 0);
1092 tgt = strrchr(src, '-');
1094 CERROR("%s: invalid target name %s: rc = %d\n",
1095 osp->opd_obd->obd_name, lustre_cfg_string(cfg, 0),
1100 if (strncmp(tgt, "-osc", 4) == 0) {
1101 /* Old OSC name fsname-OSTXXXX-osc */
1102 for (tgt--; tgt > src && *tgt != '-'; tgt--)
1105 CERROR("%s: invalid target name %s: rc = %d\n",
1106 osp->opd_obd->obd_name,
1107 lustre_cfg_string(cfg, 0), -EINVAL);
1111 if (strncmp(tgt, "-OST", 4) != 0) {
1112 CERROR("%s: invalid target name %s: rc = %d\n",
1113 osp->opd_obd->obd_name,
1114 lustre_cfg_string(cfg, 0), -EINVAL);
1118 rc = target_name2index(tgt + 1, &idx, &mdt);
1119 if (rc < 0 || rc & LDD_F_SV_ALL || mdt[0] != '-') {
1120 CERROR("%s: invalid OST index in '%s': rc = %d\n",
1121 osp->opd_obd->obd_name, src, -EINVAL);
1124 osp->opd_index = idx;
1128 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
1129 if (strncmp(tgt, "-MDT", 4) != 0 &&
1130 strncmp(tgt, "-OST", 4) != 0) {
1131 CERROR("%s: invalid target name %s: rc = %d\n",
1132 osp->opd_obd->obd_name,
1133 lustre_cfg_string(cfg, 0), -EINVAL);
1137 rc = target_name2index(tgt + 1, &idx, &mdt);
1138 if (rc < 0 || rc & LDD_F_SV_ALL || *mdt != '\0') {
1139 CERROR("%s: invalid OST index in '%s': rc = %d\n",
1140 osp->opd_obd->obd_name, src, -EINVAL);
1144 /* Get MDT index from the name and set it to opd_group,
1145 * which will be used by OSP to connect with OST */
1146 osp->opd_group = idx;
1147 if (tgt - src <= 12) {
1148 CERROR("%s: invalid mdt index from %s: rc =%d\n",
1149 osp->opd_obd->obd_name,
1150 lustre_cfg_string(cfg, 0), -EINVAL);
1154 if (strncmp(tgt - 12, "-MDT", 4) == 0)
1155 osp->opd_connect_mdt = 1;
1157 rc = target_name2index(tgt - 11, &idx, &mdt);
1158 if (rc < 0 || rc & LDD_F_SV_ALL || mdt[0] != '-') {
1159 CERROR("%s: invalid OST index in '%s': rc =%d\n",
1160 osp->opd_obd->obd_name, src, -EINVAL);
1164 osp->opd_index = idx;
1165 idx = tgt - src - 12;
1167 /* check the fsname length, and after this everything else will fit */
1168 if (idx > MTI_NAME_MAXLEN) {
1169 CERROR("%s: fsname too long in '%s': rc = %d\n",
1170 osp->opd_obd->obd_name, src, -EINVAL);
1174 OBD_ALLOC(osdname, MAX_OBD_NAME);
1175 if (osdname == NULL)
1178 memcpy(osdname, src, idx); /* copy just the fsname part */
1179 osdname[idx] = '\0';
1181 mdt = strstr(mdt, "-MDT");
1182 if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
1183 strcat(osdname, "-MDT0000");
1185 strcat(osdname, mdt);
1186 strcat(osdname, "-osd");
1187 CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
1189 osp->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
1190 osp->opd_dt_dev.dd_ops = &osp_dt_ops;
1192 obd->obd_lu_dev = &osp->opd_dt_dev.dd_lu_dev;
1194 rc = osp_connect_to_osd(env, osp, osdname);
1198 rc = ptlrpcd_addref();
1200 GOTO(out_disconnect, rc);
1202 rc = client_obd_setup(obd, cfg);
1204 CERROR("%s: can't setup obd: rc = %d\n", osp->opd_obd->obd_name,
1209 osp_tunables_init(osp);
1211 rc = obd_fid_init(osp->opd_obd, NULL, osp->opd_connect_mdt ?
1212 LUSTRE_SEQ_METADATA : LUSTRE_SEQ_DATA);
1214 CERROR("%s: fid init error: rc = %d\n",
1215 osp->opd_obd->obd_name, rc);
1219 if (!osp->opd_connect_mdt) {
1220 /* Initialize last id from the storage - will be
1221 * used in orphan cleanup. */
1222 if (!osp->opd_storage->dd_rdonly) {
1223 rc = osp_last_used_init(env, osp);
1228 /* Initialize precreation thread, it handles new
1229 * connections as well. */
1230 rc = osp_init_precreate(osp);
1232 GOTO(out_last_used, rc);
1235 * Initialize synhronization mechanism taking
1236 * care of propogating changes to OST in near
1237 * transactional manner.
1239 rc = osp_sync_init(env, osp);
1241 GOTO(out_precreat, rc);
1243 osp->opd_got_disconnected = 1;
1244 rc = osp_update_init(osp);
1249 rc = osp_init_statfs(osp);
1251 GOTO(out_precreat, rc);
1253 ns_register_cancel(obd->obd_namespace, osp_cancel_weight);
1256 * Initiate connect to OST
1258 imp = obd->u.cli.cl_import;
1260 rc = ptlrpc_init_import(imp);
1264 OBD_FREE(osdname, MAX_OBD_NAME);
1265 init_waitqueue_head(&osp->opd_out_waitq);
1269 if (!osp->opd_connect_mdt)
1270 /* stop sync thread */
1273 /* stop precreate thread */
1274 if (!osp->opd_connect_mdt)
1275 osp_precreate_fini(osp);
1277 osp_update_fini(env, osp);
1279 if (!osp->opd_connect_mdt)
1280 osp_last_used_fini(env, osp);
1282 obd_fid_fini(osp->opd_obd);
1284 osp_tunables_fini(osp);
1285 client_obd_cleanup(obd);
1289 obd_disconnect(osp->opd_storage_exp);
1292 OBD_FREE(osdname, MAX_OBD_NAME);
1297 * Implementation of lu_device_type_operations::ldto_device_free
1299 * Free the OSP device in memory. No return value is needed for now,
1300 * so always return NULL to comply with the interface.
1302 * \param[in] env execution environment
1303 * \param[in] lu lu_device of OSP
1305 * \retval NULL NULL unconditionally
1307 static struct lu_device *osp_device_free(const struct lu_env *env,
1308 struct lu_device *lu)
1310 struct osp_device *osp = lu2osp_dev(lu);
1312 lu_site_print(env, lu->ld_site, &lu->ld_ref, D_ERROR,
1314 dt_device_fini(&osp->opd_dt_dev);
1321 * Implementation of lu_device_type_operations::ldto_device_alloc
1323 * This function allocates and initializes OSP device in memory according to
1326 * \param[in] env execution environment
1327 * \param[in] type device type of OSP
1328 * \param[in] lcfg config log
1330 * \retval pointer the pointer of allocated OSP if succeed.
1331 * \retval ERR_PTR(errno) ERR_PTR(errno) if failed.
1333 static struct lu_device *osp_device_alloc(const struct lu_env *env,
1334 struct lu_device_type *type,
1335 struct lustre_cfg *lcfg)
1337 struct osp_device *osp;
1338 struct lu_device *ld;
1342 ld = ERR_PTR(-ENOMEM);
1346 ld = osp2lu_dev(osp);
1347 dt_device_init(&osp->opd_dt_dev, type);
1348 rc = osp_init0(env, osp, type, lcfg);
1350 osp_device_free(env, ld);
1358 * Implementation of lu_device_type_operations::ldto_device_fini
1360 * This function cleans up the OSP device, i.e. release and free those
1361 * attached items in osp_device.
1363 * \param[in] env execution environment
1364 * \param[in] ld lu_device of OSP
1366 * \retval NULL NULL if cleanup succeeded.
1367 * \retval ERR_PTR(errno) ERR_PTR(errno) if cleanup failed.
1369 static struct lu_device *osp_device_fini(const struct lu_env *env,
1370 struct lu_device *ld)
1372 struct osp_device *osp = lu2osp_dev(ld);
1377 if (osp->opd_async_requests != NULL) {
1378 osp_update_request_destroy(env, osp->opd_async_requests);
1379 osp->opd_async_requests = NULL;
1382 if (osp->opd_storage_exp) {
1383 /* wait for the commit callbacks to complete */
1384 wait_event(osp->opd_sync_waitq,
1385 atomic_read(&osp->opd_commits_registered) == 0);
1386 obd_disconnect(osp->opd_storage_exp);
1389 LASSERT(osp->opd_obd);
1391 rc = client_obd_cleanup(osp->opd_obd);
1394 RETURN(ERR_PTR(rc));
1397 osp_tunables_fini(osp);
1405 * Implementation of obd_ops::o_reconnect
1407 * This function is empty and does not need to do anything for now.
1409 static int osp_reconnect(const struct lu_env *env,
1410 struct obd_export *exp, struct obd_device *obd,
1411 struct obd_uuid *cluuid,
1412 struct obd_connect_data *data,
1419 * Implementation of obd_ops::o_connect
1421 * Connect OSP to the remote target (MDT or OST). Allocate the
1422 * export and return it to the LOD, which calls this function
1423 * for each OSP to connect it to the remote target. This function
1424 * is currently only called once per OSP.
1426 * \param[in] env execution environment
1427 * \param[out] exp export connected to OSP
1428 * \param[in] obd OSP device
1429 * \param[in] cluuid OSP device client uuid
1430 * \param[in] data connect_data to be used to connect to the remote
1432 * \param[in] localdata necessary for the API interface, but not used in
1435 * \retval 0 0 if the connection succeeded.
1436 * \retval negative negative errno if the connection failed.
1438 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
1439 struct obd_device *obd, struct obd_uuid *cluuid,
1440 struct obd_connect_data *data, void *localdata)
1442 struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
1447 LASSERT(data != NULL);
1448 LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
1450 rc = client_connect_import(env, &osp->opd_exp, obd, cluuid, data,
1455 *exp = osp->opd_exp;
1457 osp->opd_obd->u.cli.cl_seq->lcs_exp = class_export_get(osp->opd_exp);
1458 /* precreate thread can be waiting for us to initialize fld client */
1459 wake_up(&osp->opd_pre_waitq);
1465 * Implementation of obd_ops::o_disconnect
1467 * Disconnect the export for the OSP. This is called by LOD to release the
1468 * OSP during cleanup (\see lod_del_device()). The OSP will be released after
1469 * the export is released.
1471 * \param[in] exp export to be disconnected.
1473 * \retval 0 0 if disconnection succeed
1474 * \retval negative negative errno if disconnection failed
1476 static int osp_obd_disconnect(struct obd_export *exp)
1478 struct obd_device *obd = exp->exp_obd;
1482 rc = class_disconnect(exp);
1484 CERROR("%s: class disconnect error: rc = %d\n",
1489 /* destroy the device */
1490 class_manual_cleanup(obd);
1496 * Implementation of obd_ops::o_statfs
1498 * Send a RPC to the remote target to get statfs status. This is only used
1499 * in lprocfs helpers by obd_statfs.
1501 * \param[in] env execution environment
1502 * \param[in] exp connection state from this OSP to the parent (LOD)
1504 * \param[out] osfs hold the statfs result
1505 * \param[in] unused Not used in this function for now
1506 * \param[in] flags flags to indicate how OSP will issue the RPC
1508 * \retval 0 0 if statfs succeeded.
1509 * \retval negative negative errno if statfs failed.
1511 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
1512 struct obd_statfs *osfs, time64_t unused, __u32 flags)
1514 struct obd_statfs *msfs;
1515 struct ptlrpc_request *req;
1516 struct obd_import *imp = NULL, *imp0;
1521 /* Since the request might also come from lprocfs, so we need
1522 * sync this with client_disconnect_export Bug15684
1524 with_imp_locked(exp->exp_obd, imp0, rc)
1525 imp = class_import_get(imp0);
1529 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
1531 class_import_put(imp);
1536 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
1538 ptlrpc_request_free(req);
1541 ptlrpc_request_set_replen(req);
1542 req->rq_request_portal = OST_CREATE_PORTAL;
1543 ptlrpc_at_set_req_timeout(req);
1545 if (flags & OBD_STATFS_NODELAY) {
1546 /* procfs requests not want stat in wait for avoid deadlock */
1547 req->rq_no_resend = 1;
1548 req->rq_no_delay = 1;
1551 rc = ptlrpc_queue_wait(req);
1555 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1557 GOTO(out, rc = -EPROTO);
1563 ptlrpc_req_finished(req);
1568 * Implementation of obd_ops::o_import_event
1570 * This function is called when some related import event happens. It will
1571 * mark the necessary flags according to the event and notify the necessary
1572 * threads (mainly precreate thread).
1574 * \param[in] obd OSP OBD device
1575 * \param[in] imp import attached from OSP to remote (OST/MDT) service
1576 * \param[in] event event related to remote service (IMP_EVENT_*)
1578 * \retval 0 0 if the event handling succeeded.
1579 * \retval negative negative errno if the event handling failed.
1581 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1582 enum obd_import_event event)
1584 struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1588 case IMP_EVENT_DISCON:
1589 d->opd_got_disconnected = 1;
1590 d->opd_imp_connected = 0;
1591 if (d->opd_connect_mdt)
1594 if (d->opd_pre != NULL) {
1595 osp_pre_update_status(d, -ENODEV);
1596 wake_up(&d->opd_pre_waitq);
1599 CDEBUG(D_HA, "got disconnected\n");
1601 case IMP_EVENT_INACTIVE:
1602 d->opd_imp_active = 0;
1603 d->opd_imp_connected = 0;
1604 d->opd_obd->obd_inactive = 1;
1605 if (d->opd_connect_mdt)
1607 if (d->opd_pre != NULL) {
1608 /* Import is invalid, we can`t get stripes so
1610 rc = imp->imp_deactive ? -ESHUTDOWN : -ENODEV;
1611 osp_pre_update_status(d, rc);
1612 wake_up(&d->opd_pre_waitq);
1615 CDEBUG(D_HA, "got inactive\n");
1617 case IMP_EVENT_ACTIVE:
1618 d->opd_imp_active = 1;
1620 d->opd_new_connection = 1;
1621 d->opd_imp_connected = 1;
1622 d->opd_imp_seen_connected = 1;
1623 d->opd_obd->obd_inactive = 0;
1624 wake_up(&d->opd_pre_waitq);
1625 if (d->opd_connect_mdt)
1628 osp_sync_check_for_work(d);
1629 CDEBUG(D_HA, "got connected\n");
1631 case IMP_EVENT_INVALIDATE:
1632 if (d->opd_connect_mdt)
1633 osp_invalidate_request(d);
1635 if (obd->obd_namespace == NULL)
1637 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1640 case IMP_EVENT_DEACTIVATE:
1641 case IMP_EVENT_ACTIVATE:
1644 CERROR("%s: unsupported import event: %#x\n",
1645 obd->obd_name, event);
1651 * Implementation of obd_ops: o_iocontrol
1653 * This function is the ioctl handler for OSP. Note: lctl will access the OSP
1654 * directly by ioctl, instead of through the MDS stack.
1656 * param[in] cmd ioctl command.
1657 * param[in] exp export of this OSP.
1658 * param[in] len data length of \a karg.
1659 * param[in] karg input argument which is packed as
1661 * param[out] uarg pointer to userspace buffer (must access by
1664 * \retval 0 0 if the ioctl handling succeeded.
1665 * \retval negative negative errno if the ioctl handling failed.
1667 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1668 void *karg, void __user *uarg)
1670 struct obd_device *obd = exp->exp_obd;
1671 struct osp_device *d;
1672 struct obd_ioctl_data *data = karg;
1677 LASSERT(obd->obd_lu_dev);
1678 d = lu2osp_dev(obd->obd_lu_dev);
1679 LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1681 if (!try_module_get(THIS_MODULE)) {
1682 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
1683 module_name(THIS_MODULE));
1688 case OBD_IOC_CLIENT_RECOVER:
1689 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1690 data->ioc_inlbuf1, 0);
1694 case IOC_OSC_SET_ACTIVE:
1695 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1699 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1700 cmd, current->comm);
1703 module_put(THIS_MODULE);
1709 * Implementation of obd_ops::o_get_info
1711 * Retrieve information by key. Retrieval starts from the top layer
1712 * (MDT) of the MDS stack and traverses the stack by calling the
1713 * obd_get_info() method of the next sub-layer.
1715 * \param[in] env execution environment
1716 * \param[in] exp export of this OSP
1717 * \param[in] keylen length of \a key
1718 * \param[in] key the key
1719 * \param[out] vallen length of \a val
1720 * \param[out] val holds the value returned by the key
1722 * \retval 0 0 if getting information succeeded.
1723 * \retval negative negative errno if getting information failed.
1725 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1726 __u32 keylen, void *key, __u32 *vallen, void *val)
1730 if (KEY_IS(KEY_OSP_CONNECTED)) {
1731 struct obd_device *obd = exp->exp_obd;
1732 struct osp_device *osp;
1734 if (!obd->obd_set_up || obd->obd_stopping)
1737 osp = lu2osp_dev(obd->obd_lu_dev);
1740 * 1.8/2.0 behaviour is that OST being connected once at least
1741 * is considered "healthy". and one "healthy" OST is enough to
1742 * allow lustre clients to connect to MDS
1744 RETURN(!osp->opd_imp_seen_connected);
1750 static int osp_obd_set_info_async(const struct lu_env *env,
1751 struct obd_export *exp,
1752 u32 keylen, void *key,
1753 u32 vallen, void *val,
1754 struct ptlrpc_request_set *set)
1756 struct obd_device *obd = exp->exp_obd;
1757 struct obd_import *imp = obd->u.cli.cl_import;
1758 struct osp_device *osp;
1759 struct ptlrpc_request *req;
1763 if (KEY_IS(KEY_SPTLRPC_CONF)) {
1764 sptlrpc_conf_client_adapt(exp->exp_obd);
1768 LASSERT(set != NULL);
1769 if (!obd->obd_set_up || obd->obd_stopping)
1771 osp = lu2osp_dev(obd->obd_lu_dev);
1773 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
1777 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1778 RCL_CLIENT, keylen);
1779 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1780 RCL_CLIENT, vallen);
1781 if (osp->opd_connect_mdt)
1782 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1784 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
1786 ptlrpc_request_free(req);
1790 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1791 memcpy(tmp, key, keylen);
1792 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1793 memcpy(tmp, val, vallen);
1795 ptlrpc_request_set_replen(req);
1796 ptlrpc_set_add_req(set, req);
1797 ptlrpc_check_set(NULL, set);
1802 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1803 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1804 static void osp_key_exit(const struct lu_context *ctx,
1805 struct lu_context_key *key, void *data)
1807 struct osp_thread_info *info = data;
1809 info->osi_attr.la_valid = 0;
1812 struct lu_context_key osp_thread_key = {
1813 .lct_tags = LCT_MD_THREAD,
1814 .lct_init = osp_key_init,
1815 .lct_fini = osp_key_fini,
1816 .lct_exit = osp_key_exit
1819 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1820 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1822 struct lu_context_key osp_txn_key = {
1823 .lct_tags = LCT_OSP_THREAD,
1824 .lct_init = osp_txn_key_init,
1825 .lct_fini = osp_txn_key_fini
1827 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1829 static const struct lu_device_type_operations osp_device_type_ops = {
1830 .ldto_init = osp_type_init,
1831 .ldto_fini = osp_type_fini,
1833 .ldto_start = osp_type_start,
1834 .ldto_stop = osp_type_stop,
1836 .ldto_device_alloc = osp_device_alloc,
1837 .ldto_device_free = osp_device_free,
1839 .ldto_device_fini = osp_device_fini
1842 static struct lu_device_type osp_device_type = {
1843 .ldt_tags = LU_DEVICE_DT,
1844 .ldt_name = LUSTRE_OSP_NAME,
1845 .ldt_ops = &osp_device_type_ops,
1846 .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1849 static const struct obd_ops osp_obd_device_ops = {
1850 .o_owner = THIS_MODULE,
1851 .o_add_conn = client_import_add_conn,
1852 .o_del_conn = client_import_del_conn,
1853 .o_reconnect = osp_reconnect,
1854 .o_connect = osp_obd_connect,
1855 .o_disconnect = osp_obd_disconnect,
1856 .o_get_info = osp_obd_get_info,
1857 .o_set_info_async = osp_obd_set_info_async,
1858 .o_import_event = osp_import_event,
1859 .o_iocontrol = osp_iocontrol,
1860 .o_statfs = osp_obd_statfs,
1861 .o_fid_init = client_fid_init,
1862 .o_fid_fini = client_fid_fini,
1866 * Initialize OSP module.
1868 * Register device types OSP and Light Weight Proxy (LWP) (\see lwp_dev.c)
1869 * in obd_types (\see class_obd.c). Initialize procfs for the
1870 * the OSP device. Note: OSP was called OSC before Lustre 2.4,
1871 * so for compatibility it still uses the name "osc" in procfs.
1872 * This is called at module load time.
1874 * \retval 0 0 if initialization succeeds.
1875 * \retval negative negative errno if initialization failed.
1877 static int __init osp_init(void)
1879 struct obd_type *sym;
1882 rc = lu_kmem_init(osp_caches);
1886 rc = class_register_type(&osp_obd_device_ops, NULL, false,
1887 LUSTRE_OSP_NAME, &osp_device_type);
1889 lu_kmem_fini(osp_caches);
1893 rc = class_register_type(&lwp_obd_device_ops, NULL, false,
1894 LUSTRE_LWP_NAME, &lwp_device_type);
1896 class_unregister_type(LUSTRE_OSP_NAME);
1897 lu_kmem_fini(osp_caches);
1901 /* create "osc" entry for compatibility purposes */
1902 sym = class_add_symlinks(LUSTRE_OSC_NAME, true);
1905 /* does real "osc" already exist ? */
1914 * Finalize OSP module.
1916 * This callback is called when kernel unloads OSP module from memory, and
1917 * it will deregister OSP and LWP device type from obd_types (\see class_obd.c).
1919 static void __exit osp_exit(void)
1921 struct obd_type *sym = class_search_type(LUSTRE_OSC_NAME);
1923 /* if this was never fully initialized by the osc layer
1924 * then we are responsible for freeing this obd_type
1927 /* final put if we manage this obd type */
1928 if (sym->typ_sym_filter)
1929 kobject_put(&sym->typ_kobj);
1930 /* put reference taken by class_search_type */
1931 kobject_put(&sym->typ_kobj);
1934 class_unregister_type(LUSTRE_LWP_NAME);
1935 class_unregister_type(LUSTRE_OSP_NAME);
1936 lu_kmem_fini(osp_caches);
1939 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1940 MODULE_DESCRIPTION("Lustre OSD Storage Proxy ("LUSTRE_OSP_NAME")");
1941 MODULE_VERSION(LUSTRE_VERSION_STRING);
1942 MODULE_LICENSE("GPL");
1944 module_init(osp_init);
1945 module_exit(osp_exit);