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 osp_update_request *our;
574 struct osp_update_request *tmp;
575 struct osp_updates *ou = osp->opd_update;
580 kthread_stop(ou->ou_update_task);
581 lu_env_fini(&ou->ou_env);
583 /* Remove the left osp thandle from the list */
584 spin_lock(&ou->ou_lock);
585 list_for_each_entry_safe(our, tmp, &ou->ou_list,
587 list_del_init(&our->our_list);
588 LASSERT(our->our_th != NULL);
589 osp_trans_callback(env, our->our_th, -EIO);
590 /* our will be destroyed in osp_thandle_put() */
591 osp_thandle_put(env, our->our_th);
593 spin_unlock(&ou->ou_lock);
596 osp->opd_update = NULL;
600 * Cleanup OSP, which includes disconnect import, cleanup unlink log, stop
601 * precreate threads etc.
603 * \param[in] env execution environment.
604 * \param[in] d OSP device being disconnected.
606 * \retval 0 0 if cleanup succeed
607 * \retval negative negative errno if cleanup failed
609 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
616 rc = osp_disconnect(d);
620 if (!d->opd_connect_mdt) {
621 /* stop sync thread */
624 /* stop precreate thread */
625 osp_precreate_fini(d);
627 /* release last_used file */
628 osp_last_used_fini(env, d);
631 obd_fid_fini(d->opd_obd);
637 * Implementation of osp_lu_ops::ldo_process_config
639 * This function processes config log records in OSP layer. It is usually
640 * called from the top layer of MDT stack, and goes through the stack by calling
641 * ldo_process_config of next layer.
643 * \param[in] env execution environment
644 * \param[in] dev lu_device of OSP
645 * \param[in] lcfg config log
647 * \retval 0 0 if the config log record is executed correctly.
648 * \retval negative negative errno if the record execution fails.
650 static int osp_process_config(const struct lu_env *env,
651 struct lu_device *dev, struct lustre_cfg *lcfg)
653 struct osp_device *d = lu2osp_dev(dev);
654 struct dt_device *dt = lu2dt_dev(dev);
655 struct obd_device *obd = d->opd_obd;
661 switch (lcfg->lcfg_command) {
662 case LCFG_PRE_CLEANUP:
663 rc = osp_disconnect(d);
664 osp_update_fini(env, d);
668 * cleanup ldlm so that PRE_CLEANUP phase doesn't block
669 * awaiting for locks held by MDT threads awaiting for
670 * all OSPs to interrupt their in-flight RPCs
672 if (obd->obd_namespace != NULL)
673 ldlm_namespace_free_prior(obd->obd_namespace, NULL, 1);
674 lu_dev_del_linkage(dev->ld_site, dev);
675 rc = osp_shutdown(env, d);
678 count = class_modify_config(lcfg, d->opd_connect_mdt ?
679 PARAM_OSP : PARAM_OSC,
682 /* class_modify_config() haven't found matching
683 * parameter and returned an error so that layer(s)
684 * below could use that. But OSP is the bottom, so
687 CERROR("%s: unknown param %s\n",
688 (char *)lustre_cfg_string(lcfg, 0),
689 (char *)lustre_cfg_string(lcfg, 1));
694 CERROR("%s: unknown command %u\n",
695 (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
704 * Implementation of osp_lu_ops::ldo_recovery_complete
706 * This function is called after recovery is finished, and OSP layer
707 * will wake up precreate thread here.
709 * \param[in] env execution environment
710 * \param[in] dev lu_device of OSP
712 * \retval 0 0 unconditionally
714 static int osp_recovery_complete(const struct lu_env *env,
715 struct lu_device *dev)
717 struct osp_device *osp = lu2osp_dev(dev);
720 osp->opd_recovery_completed = 1;
722 if (!osp->opd_connect_mdt && osp->opd_pre != NULL)
723 wake_up(&osp->opd_pre_waitq);
729 * Implementation of lu_device_operations::ldo_fid_alloc() for OSP
731 * Allocate FID from remote MDT.
733 * see include/lu_object.h for the details.
735 static int osp_fid_alloc(const struct lu_env *env, struct lu_device *d,
736 struct lu_fid *fid, struct lu_object *parent,
737 const struct lu_name *name)
739 struct osp_device *osp = lu2osp_dev(d);
740 struct client_obd *cli = &osp->opd_obd->u.cli;
741 struct lu_client_seq *seq = cli->cl_seq;
746 /* Sigh, fid client is not ready yet */
747 if (!osp->opd_obd->u.cli.cl_seq)
750 if (!osp->opd_obd->u.cli.cl_seq->lcs_exp)
753 rc = seq_client_alloc_fid(env, seq, fid);
758 const struct lu_device_operations osp_lu_ops = {
759 .ldo_object_alloc = osp_object_alloc,
760 .ldo_process_config = osp_process_config,
761 .ldo_recovery_complete = osp_recovery_complete,
762 .ldo_fid_alloc = osp_fid_alloc,
766 * Implementation of dt_device_operations::dt_statfs
768 * This function provides statfs status (for precreation) from
769 * corresponding OST. Note: this function only retrieves the status
770 * from the OSP device, and the real statfs RPC happens inside
771 * precreate thread (\see osp_statfs_update). Note: OSP for MDT does
772 * not need to retrieve statfs data for now.
774 * \param[in] env execution environment.
775 * \param[in] dev dt_device of OSP.
776 * \param[out] sfs holds the retrieved statfs data.
778 * \retval 0 0 statfs data was retrieved successfully or
779 * retrieval was not needed
780 * \retval negative negative errno if get statfs failed.
782 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
783 struct obd_statfs *sfs, struct obd_statfs_info *info)
785 struct osp_device *d = dt2osp_dev(dev);
786 struct obd_import *imp = d->opd_obd->u.cli.cl_import;
790 if (imp->imp_state == LUSTRE_IMP_CLOSED)
793 if (unlikely(d->opd_imp_active == 0))
796 /* return recently updated data */
797 *sfs = d->opd_statfs;
799 info->os_reserved_mb_low = d->opd_reserved_mb_low;
800 info->os_reserved_mb_high = d->opd_reserved_mb_high;
803 CDEBUG(D_OTHER, "%s: %llu blocks, %llu free, %llu avail, "
804 "%u bsize, %u reserved mb low, %u reserved mb high, "
805 "%llu files, %llu free files\n", d->opd_obd->obd_name,
806 sfs->os_blocks, sfs->os_bfree, sfs->os_bavail, sfs->os_bsize,
807 d->opd_reserved_mb_low, d->opd_reserved_mb_high,
808 sfs->os_files, sfs->os_ffree);
810 if (d->opd_pre == NULL || (info && !info->os_enable_pre))
814 * The layer above osp (usually lod) can use f_precreated to
815 * estimate how many objects are available for immediate usage.
817 spin_lock(&d->opd_pre_lock);
818 sfs->os_fprecreated = osp_fid_diff(&d->opd_pre_last_created_fid,
819 &d->opd_pre_used_fid);
820 sfs->os_fprecreated -= d->opd_pre_reserved;
821 LASSERTF(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2,
822 "last_created "DFID", next_fid "DFID", reserved %llu\n",
823 PFID(&d->opd_pre_last_created_fid), PFID(&d->opd_pre_used_fid),
824 d->opd_pre_reserved);
825 spin_unlock(&d->opd_pre_lock);
830 * Implementation of dt_device_operations::dt_sync
832 * This function synchronizes the OSP cache to the remote target. It wakes
833 * up unlink log threads and sends out unlink records to the remote OST.
835 * \param[in] env execution environment
836 * \param[in] dev dt_device of OSP
838 * \retval 0 0 if synchronization succeeds
839 * \retval negative negative errno if synchronization fails
841 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
843 struct osp_device *d = dt2osp_dev(dev);
844 time64_t start = ktime_get_seconds();
850 /* No Sync between MDTs yet. */
851 if (d->opd_connect_mdt)
854 recs = atomic_read(&d->opd_sync_changes);
855 old = atomic64_read(&d->opd_sync_processed_recs);
857 osp_sync_force(env, dt2osp_dev(dev));
859 if (unlikely(d->opd_imp_active == 0))
862 down_write(&d->opd_async_updates_rwsem);
864 CDEBUG(D_OTHER, "%s: async updates %d\n", d->opd_obd->obd_name,
865 atomic_read(&d->opd_async_updates_count));
867 /* make sure the connection is fine */
868 rc = wait_event_idle_timeout(
869 d->opd_sync_barrier_waitq,
870 atomic_read(&d->opd_async_updates_count) == 0,
871 cfs_time_seconds(obd_timeout));
877 up_write(&d->opd_async_updates_rwsem);
881 CDEBUG(D_CACHE, "%s: processed %llu\n", d->opd_obd->obd_name,
882 (unsigned long long)atomic64_read(&d->opd_sync_processed_recs));
884 while (atomic64_read(&d->opd_sync_processed_recs) < old + recs) {
885 __u64 last = atomic64_read(&d->opd_sync_processed_recs);
886 /* make sure the connection is fine */
887 wait_event_idle_timeout(
888 d->opd_sync_barrier_waitq,
889 atomic64_read(&d->opd_sync_processed_recs)
891 cfs_time_seconds(obd_timeout));
893 if (atomic64_read(&d->opd_sync_processed_recs) >= old + recs)
896 if (atomic64_read(&d->opd_sync_processed_recs) != last) {
897 /* some progress have been made,
902 /* no changes and expired, something is wrong */
903 GOTO(out, rc = -ETIMEDOUT);
906 /* block new processing (barrier>0 - few callers are possible */
907 atomic_inc(&d->opd_sync_barrier);
909 CDEBUG(D_CACHE, "%s: %u in flight\n", d->opd_obd->obd_name,
910 atomic_read(&d->opd_sync_rpcs_in_flight));
912 /* wait till all-in-flight are replied, so executed by the target */
913 /* XXX: this is used by LFSCK at the moment, which doesn't require
914 * all the changes to be committed, but in general it'd be
915 * better to wait till commit */
916 while (atomic_read(&d->opd_sync_rpcs_in_flight) > 0) {
917 old = atomic_read(&d->opd_sync_rpcs_in_flight);
919 wait_event_idle_timeout(
920 d->opd_sync_barrier_waitq,
921 atomic_read(&d->opd_sync_rpcs_in_flight) == 0,
922 cfs_time_seconds(obd_timeout));
924 if (atomic_read(&d->opd_sync_rpcs_in_flight) == 0)
927 if (atomic_read(&d->opd_sync_rpcs_in_flight) != old) {
928 /* some progress have been made */
932 /* no changes and expired, something is wrong */
933 GOTO(out, rc = -ETIMEDOUT);
937 /* resume normal processing (barrier=0) */
938 atomic_dec(&d->opd_sync_barrier);
939 osp_sync_check_for_work(d);
941 CDEBUG(D_CACHE, "%s: done in %lld: rc = %d\n", d->opd_obd->obd_name,
942 ktime_get_seconds() - start, rc);
947 static const struct dt_device_operations osp_dt_ops = {
948 .dt_statfs = osp_statfs,
950 .dt_trans_create = osp_trans_create,
951 .dt_trans_start = osp_trans_start,
952 .dt_trans_stop = osp_trans_stop,
953 .dt_trans_cb_add = osp_trans_cb_add,
957 * Connect OSP to local OSD.
959 * Locate the local OSD referenced by \a nextdev and connect to it. Sometimes,
960 * OSP needs to access the local OSD to store some information. For example,
961 * during precreate, it needs to update last used OID and sequence file
962 * (LAST_SEQ) in local OSD.
964 * \param[in] env execution environment
965 * \param[in] osp OSP device
966 * \param[in] nextdev the name of local OSD
968 * \retval 0 0 connection succeeded
969 * \retval negative negative errno connection failed
971 static int osp_connect_to_osd(const struct lu_env *env, struct osp_device *osp,
974 struct obd_connect_data *data = NULL;
975 struct obd_device *obd;
980 LASSERT(osp->opd_storage_exp == NULL);
986 obd = class_name2obd(nextdev);
988 CERROR("%s: can't locate next device: %s\n",
989 osp->opd_obd->obd_name, nextdev);
990 GOTO(out, rc = -ENOTCONN);
993 rc = obd_connect(env, &osp->opd_storage_exp, obd, &obd->obd_uuid, data,
996 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
997 osp->opd_obd->obd_name, nextdev, rc);
1001 osp->opd_dt_dev.dd_lu_dev.ld_site =
1002 osp->opd_storage_exp->exp_obd->obd_lu_dev->ld_site;
1003 LASSERT(osp->opd_dt_dev.dd_lu_dev.ld_site);
1004 osp->opd_storage = lu2dt_dev(osp->opd_storage_exp->exp_obd->obd_lu_dev);
1012 * Determine if the lock needs to be cancelled
1014 * Determine if the unused lock should be cancelled before replay, see
1015 * (ldlm_cancel_no_wait_policy()). Currently, only inode bits lock exists
1018 * \param[in] lock lock to be checked.
1020 * \retval 1 if the lock needs to be cancelled before replay.
1021 * \retval 0 if the lock does not need to be cancelled before
1024 static int osp_cancel_weight(struct ldlm_lock *lock)
1026 if (lock->l_resource->lr_type != LDLM_IBITS)
1033 * Initialize OSP device according to the parameters in the configuration
1036 * Reconstruct the local device name from the configuration profile, and
1037 * initialize necessary threads and structures according to the OSP type
1040 * Since there is no record in the MDT configuration for the local disk
1041 * device, we have to extract this from elsewhere in the profile.
1042 * The only information we get at setup is from the OSC records:
1043 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
1045 * Note: configs generated by Lustre 1.8 are missing the -MDTxxxx part,
1046 * so, we need to reconstruct the name of the underlying OSD from this:
1047 * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".
1049 * \param[in] env execution environment
1050 * \param[in] osp OSP device
1051 * \param[in] ldt lu device type of OSP
1052 * \param[in] cfg configuration log
1054 * \retval 0 0 if OSP initialization succeeded.
1055 * \retval negative negative errno if OSP initialization failed.
1057 static int osp_init0(const struct lu_env *env, struct osp_device *osp,
1058 struct lu_device_type *ldt, struct lustre_cfg *cfg)
1060 struct obd_device *obd;
1061 struct obd_import *imp;
1062 char *src, *tgt, *osdname = NULL;
1069 mutex_init(&osp->opd_async_requests_mutex);
1070 INIT_LIST_HEAD(&osp->opd_async_updates);
1071 init_rwsem(&osp->opd_async_updates_rwsem);
1072 atomic_set(&osp->opd_async_updates_count, 0);
1074 obd = class_name2obd(lustre_cfg_string(cfg, 0));
1076 CERROR("Cannot find obd with name %s\n",
1077 lustre_cfg_string(cfg, 0));
1082 src = lustre_cfg_string(cfg, 0);
1086 tgt = strrchr(src, '-');
1088 CERROR("%s: invalid target name %s: rc = %d\n",
1089 osp->opd_obd->obd_name, lustre_cfg_string(cfg, 0),
1094 if (strncmp(tgt, "-osc", 4) == 0) {
1095 /* Old OSC name fsname-OSTXXXX-osc */
1096 for (tgt--; tgt > src && *tgt != '-'; tgt--)
1099 CERROR("%s: invalid target name %s: rc = %d\n",
1100 osp->opd_obd->obd_name,
1101 lustre_cfg_string(cfg, 0), -EINVAL);
1105 if (strncmp(tgt, "-OST", 4) != 0) {
1106 CERROR("%s: invalid target name %s: rc = %d\n",
1107 osp->opd_obd->obd_name,
1108 lustre_cfg_string(cfg, 0), -EINVAL);
1112 rc = target_name2index(tgt + 1, &idx, &mdt);
1113 if (rc < 0 || rc & LDD_F_SV_ALL || mdt[0] != '-') {
1114 CERROR("%s: invalid OST index in '%s': rc = %d\n",
1115 osp->opd_obd->obd_name, src, -EINVAL);
1118 osp->opd_index = idx;
1122 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
1123 if (strncmp(tgt, "-MDT", 4) != 0 &&
1124 strncmp(tgt, "-OST", 4) != 0) {
1125 CERROR("%s: invalid target name %s: rc = %d\n",
1126 osp->opd_obd->obd_name,
1127 lustre_cfg_string(cfg, 0), -EINVAL);
1131 rc = target_name2index(tgt + 1, &idx, &mdt);
1132 if (rc < 0 || rc & LDD_F_SV_ALL || *mdt != '\0') {
1133 CERROR("%s: invalid OST index in '%s': rc = %d\n",
1134 osp->opd_obd->obd_name, src, -EINVAL);
1138 /* Get MDT index from the name and set it to opd_group,
1139 * which will be used by OSP to connect with OST */
1140 osp->opd_group = idx;
1141 if (tgt - src <= 12) {
1142 CERROR("%s: invalid mdt index from %s: rc =%d\n",
1143 osp->opd_obd->obd_name,
1144 lustre_cfg_string(cfg, 0), -EINVAL);
1148 if (strncmp(tgt - 12, "-MDT", 4) == 0)
1149 osp->opd_connect_mdt = 1;
1151 rc = target_name2index(tgt - 11, &idx, &mdt);
1152 if (rc < 0 || rc & LDD_F_SV_ALL || mdt[0] != '-') {
1153 CERROR("%s: invalid OST index in '%s': rc =%d\n",
1154 osp->opd_obd->obd_name, src, -EINVAL);
1158 osp->opd_index = idx;
1159 idx = tgt - src - 12;
1161 /* check the fsname length, and after this everything else will fit */
1162 if (idx > MTI_NAME_MAXLEN) {
1163 CERROR("%s: fsname too long in '%s': rc = %d\n",
1164 osp->opd_obd->obd_name, src, -EINVAL);
1168 OBD_ALLOC(osdname, MAX_OBD_NAME);
1169 if (osdname == NULL)
1172 memcpy(osdname, src, idx); /* copy just the fsname part */
1173 osdname[idx] = '\0';
1175 mdt = strstr(mdt, "-MDT");
1176 if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
1177 strcat(osdname, "-MDT0000");
1179 strcat(osdname, mdt);
1180 strcat(osdname, "-osd");
1181 CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
1183 osp->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
1184 osp->opd_dt_dev.dd_ops = &osp_dt_ops;
1186 obd->obd_lu_dev = &osp->opd_dt_dev.dd_lu_dev;
1188 rc = osp_connect_to_osd(env, osp, osdname);
1192 rc = ptlrpcd_addref();
1194 GOTO(out_disconnect, rc);
1196 rc = client_obd_setup(obd, cfg);
1198 CERROR("%s: can't setup obd: rc = %d\n", osp->opd_obd->obd_name,
1203 osp_tunables_init(osp);
1205 rc = obd_fid_init(osp->opd_obd, NULL, osp->opd_connect_mdt ?
1206 LUSTRE_SEQ_METADATA : LUSTRE_SEQ_DATA);
1208 CERROR("%s: fid init error: rc = %d\n",
1209 osp->opd_obd->obd_name, rc);
1213 if (!osp->opd_connect_mdt) {
1214 /* Initialize last id from the storage - will be
1215 * used in orphan cleanup. */
1216 if (!osp->opd_storage->dd_rdonly) {
1217 rc = osp_last_used_init(env, osp);
1222 /* Initialize precreation thread, it handles new
1223 * connections as well. */
1224 rc = osp_init_precreate(osp);
1226 GOTO(out_last_used, rc);
1229 * Initialize synhronization mechanism taking
1230 * care of propogating changes to OST in near
1231 * transactional manner.
1233 rc = osp_sync_init(env, osp);
1235 GOTO(out_precreat, rc);
1237 osp->opd_got_disconnected = 1;
1238 rc = osp_update_init(osp);
1243 rc = osp_init_statfs(osp);
1245 GOTO(out_precreat, rc);
1247 ns_register_cancel(obd->obd_namespace, osp_cancel_weight);
1250 * Initiate connect to OST
1252 imp = obd->u.cli.cl_import;
1254 rc = ptlrpc_init_import(imp);
1258 OBD_FREE(osdname, MAX_OBD_NAME);
1259 init_waitqueue_head(&osp->opd_out_waitq);
1263 if (!osp->opd_connect_mdt)
1264 /* stop sync thread */
1267 /* stop precreate thread */
1268 if (!osp->opd_connect_mdt)
1269 osp_precreate_fini(osp);
1271 osp_update_fini(env, osp);
1273 if (!osp->opd_connect_mdt)
1274 osp_last_used_fini(env, osp);
1276 obd_fid_fini(osp->opd_obd);
1278 osp_tunables_fini(osp);
1279 client_obd_cleanup(obd);
1283 obd_disconnect(osp->opd_storage_exp);
1286 OBD_FREE(osdname, MAX_OBD_NAME);
1291 * Implementation of lu_device_type_operations::ldto_device_free
1293 * Free the OSP device in memory. No return value is needed for now,
1294 * so always return NULL to comply with the interface.
1296 * \param[in] env execution environment
1297 * \param[in] lu lu_device of OSP
1299 * \retval NULL NULL unconditionally
1301 static struct lu_device *osp_device_free(const struct lu_env *env,
1302 struct lu_device *lu)
1304 struct osp_device *osp = lu2osp_dev(lu);
1306 lu_site_print(env, lu->ld_site, &lu->ld_ref, D_ERROR,
1308 dt_device_fini(&osp->opd_dt_dev);
1315 * Implementation of lu_device_type_operations::ldto_device_alloc
1317 * This function allocates and initializes OSP device in memory according to
1320 * \param[in] env execution environment
1321 * \param[in] type device type of OSP
1322 * \param[in] lcfg config log
1324 * \retval pointer the pointer of allocated OSP if succeed.
1325 * \retval ERR_PTR(errno) ERR_PTR(errno) if failed.
1327 static struct lu_device *osp_device_alloc(const struct lu_env *env,
1328 struct lu_device_type *type,
1329 struct lustre_cfg *lcfg)
1331 struct osp_device *osp;
1332 struct lu_device *ld;
1336 ld = ERR_PTR(-ENOMEM);
1340 ld = osp2lu_dev(osp);
1341 dt_device_init(&osp->opd_dt_dev, type);
1342 rc = osp_init0(env, osp, type, lcfg);
1344 osp_device_free(env, ld);
1352 * Implementation of lu_device_type_operations::ldto_device_fini
1354 * This function cleans up the OSP device, i.e. release and free those
1355 * attached items in osp_device.
1357 * \param[in] env execution environment
1358 * \param[in] ld lu_device of OSP
1360 * \retval NULL NULL if cleanup succeeded.
1361 * \retval ERR_PTR(errno) ERR_PTR(errno) if cleanup failed.
1363 static struct lu_device *osp_device_fini(const struct lu_env *env,
1364 struct lu_device *ld)
1366 struct osp_device *osp = lu2osp_dev(ld);
1371 if (osp->opd_async_requests != NULL) {
1372 osp_update_request_destroy(env, osp->opd_async_requests);
1373 osp->opd_async_requests = NULL;
1376 if (osp->opd_storage_exp) {
1377 /* wait for the commit callbacks to complete */
1378 wait_event(osp->opd_sync_waitq,
1379 atomic_read(&osp->opd_commits_registered) == 0);
1380 obd_disconnect(osp->opd_storage_exp);
1383 LASSERT(osp->opd_obd);
1385 rc = client_obd_cleanup(osp->opd_obd);
1388 RETURN(ERR_PTR(rc));
1391 osp_tunables_fini(osp);
1399 * Implementation of obd_ops::o_reconnect
1401 * This function is empty and does not need to do anything for now.
1403 static int osp_reconnect(const struct lu_env *env,
1404 struct obd_export *exp, struct obd_device *obd,
1405 struct obd_uuid *cluuid,
1406 struct obd_connect_data *data,
1413 * Implementation of obd_ops::o_connect
1415 * Connect OSP to the remote target (MDT or OST). Allocate the
1416 * export and return it to the LOD, which calls this function
1417 * for each OSP to connect it to the remote target. This function
1418 * is currently only called once per OSP.
1420 * \param[in] env execution environment
1421 * \param[out] exp export connected to OSP
1422 * \param[in] obd OSP device
1423 * \param[in] cluuid OSP device client uuid
1424 * \param[in] data connect_data to be used to connect to the remote
1426 * \param[in] localdata necessary for the API interface, but not used in
1429 * \retval 0 0 if the connection succeeded.
1430 * \retval negative negative errno if the connection failed.
1432 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
1433 struct obd_device *obd, struct obd_uuid *cluuid,
1434 struct obd_connect_data *data, void *localdata)
1436 struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
1441 LASSERT(data != NULL);
1442 LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
1444 rc = client_connect_import(env, &osp->opd_exp, obd, cluuid, data,
1449 *exp = osp->opd_exp;
1451 osp->opd_obd->u.cli.cl_seq->lcs_exp = class_export_get(osp->opd_exp);
1452 /* precreate thread can be waiting for us to initialize fld client */
1453 wake_up(&osp->opd_pre_waitq);
1459 * Implementation of obd_ops::o_disconnect
1461 * Disconnect the export for the OSP. This is called by LOD to release the
1462 * OSP during cleanup (\see lod_del_device()). The OSP will be released after
1463 * the export is released.
1465 * \param[in] exp export to be disconnected.
1467 * \retval 0 0 if disconnection succeed
1468 * \retval negative negative errno if disconnection failed
1470 static int osp_obd_disconnect(struct obd_export *exp)
1472 struct obd_device *obd = exp->exp_obd;
1476 rc = class_disconnect(exp);
1478 CERROR("%s: class disconnect error: rc = %d\n",
1483 /* destroy the device */
1484 class_manual_cleanup(obd);
1490 * Implementation of obd_ops::o_statfs
1492 * Send a RPC to the remote target to get statfs status. This is only used
1493 * in lprocfs helpers by obd_statfs.
1495 * \param[in] env execution environment
1496 * \param[in] exp connection state from this OSP to the parent (LOD)
1498 * \param[out] osfs hold the statfs result
1499 * \param[in] unused Not used in this function for now
1500 * \param[in] flags flags to indicate how OSP will issue the RPC
1502 * \retval 0 0 if statfs succeeded.
1503 * \retval negative negative errno if statfs failed.
1505 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
1506 struct obd_statfs *osfs, time64_t unused, __u32 flags)
1508 struct obd_statfs *msfs;
1509 struct ptlrpc_request *req;
1510 struct obd_import *imp = NULL, *imp0;
1515 /* Since the request might also come from lprocfs, so we need
1516 * sync this with client_disconnect_export Bug15684
1518 with_imp_locked(exp->exp_obd, imp0, rc)
1519 imp = class_import_get(imp0);
1523 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
1525 class_import_put(imp);
1530 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
1532 ptlrpc_request_free(req);
1535 ptlrpc_request_set_replen(req);
1536 req->rq_request_portal = OST_CREATE_PORTAL;
1537 ptlrpc_at_set_req_timeout(req);
1539 if (flags & OBD_STATFS_NODELAY) {
1540 /* procfs requests not want stat in wait for avoid deadlock */
1541 req->rq_no_resend = 1;
1542 req->rq_no_delay = 1;
1545 rc = ptlrpc_queue_wait(req);
1549 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1551 GOTO(out, rc = -EPROTO);
1557 ptlrpc_req_finished(req);
1562 * Implementation of obd_ops::o_import_event
1564 * This function is called when some related import event happens. It will
1565 * mark the necessary flags according to the event and notify the necessary
1566 * threads (mainly precreate thread).
1568 * \param[in] obd OSP OBD device
1569 * \param[in] imp import attached from OSP to remote (OST/MDT) service
1570 * \param[in] event event related to remote service (IMP_EVENT_*)
1572 * \retval 0 0 if the event handling succeeded.
1573 * \retval negative negative errno if the event handling failed.
1575 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1576 enum obd_import_event event)
1578 struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1582 case IMP_EVENT_DISCON:
1583 d->opd_got_disconnected = 1;
1584 d->opd_imp_connected = 0;
1585 if (d->opd_connect_mdt)
1588 if (d->opd_pre != NULL) {
1589 osp_pre_update_status(d, -ENODEV);
1590 wake_up(&d->opd_pre_waitq);
1593 CDEBUG(D_HA, "got disconnected\n");
1595 case IMP_EVENT_INACTIVE:
1596 d->opd_imp_active = 0;
1597 d->opd_imp_connected = 0;
1598 d->opd_obd->obd_inactive = 1;
1599 if (d->opd_connect_mdt)
1601 if (d->opd_pre != NULL) {
1602 /* Import is invalid, we can`t get stripes so
1604 rc = imp->imp_deactive ? -ESHUTDOWN : -ENODEV;
1605 osp_pre_update_status(d, rc);
1606 wake_up(&d->opd_pre_waitq);
1609 CDEBUG(D_HA, "got inactive\n");
1611 case IMP_EVENT_ACTIVE:
1612 d->opd_imp_active = 1;
1614 d->opd_new_connection = 1;
1615 d->opd_imp_connected = 1;
1616 d->opd_imp_seen_connected = 1;
1617 d->opd_obd->obd_inactive = 0;
1618 wake_up(&d->opd_pre_waitq);
1619 if (d->opd_connect_mdt)
1622 osp_sync_check_for_work(d);
1623 CDEBUG(D_HA, "got connected\n");
1625 case IMP_EVENT_INVALIDATE:
1626 if (d->opd_connect_mdt)
1627 osp_invalidate_request(d);
1629 if (obd->obd_namespace == NULL)
1631 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1634 case IMP_EVENT_DEACTIVATE:
1635 case IMP_EVENT_ACTIVATE:
1638 CERROR("%s: unsupported import event: %#x\n",
1639 obd->obd_name, event);
1645 * Implementation of obd_ops: o_iocontrol
1647 * This function is the ioctl handler for OSP. Note: lctl will access the OSP
1648 * directly by ioctl, instead of through the MDS stack.
1650 * param[in] cmd ioctl command.
1651 * param[in] exp export of this OSP.
1652 * param[in] len data length of \a karg.
1653 * param[in] karg input argument which is packed as
1655 * param[out] uarg pointer to userspace buffer (must access by
1658 * \retval 0 0 if the ioctl handling succeeded.
1659 * \retval negative negative errno if the ioctl handling failed.
1661 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1662 void *karg, void __user *uarg)
1664 struct obd_device *obd = exp->exp_obd;
1665 struct osp_device *d;
1666 struct obd_ioctl_data *data = karg;
1671 LASSERT(obd->obd_lu_dev);
1672 d = lu2osp_dev(obd->obd_lu_dev);
1673 LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1675 if (!try_module_get(THIS_MODULE)) {
1676 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
1677 module_name(THIS_MODULE));
1682 case OBD_IOC_CLIENT_RECOVER:
1683 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1684 data->ioc_inlbuf1, 0);
1688 case IOC_OSC_SET_ACTIVE:
1689 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1693 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1694 cmd, current->comm);
1697 module_put(THIS_MODULE);
1703 * Implementation of obd_ops::o_get_info
1705 * Retrieve information by key. Retrieval starts from the top layer
1706 * (MDT) of the MDS stack and traverses the stack by calling the
1707 * obd_get_info() method of the next sub-layer.
1709 * \param[in] env execution environment
1710 * \param[in] exp export of this OSP
1711 * \param[in] keylen length of \a key
1712 * \param[in] key the key
1713 * \param[out] vallen length of \a val
1714 * \param[out] val holds the value returned by the key
1716 * \retval 0 0 if getting information succeeded.
1717 * \retval negative negative errno if getting information failed.
1719 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1720 __u32 keylen, void *key, __u32 *vallen, void *val)
1724 if (KEY_IS(KEY_OSP_CONNECTED)) {
1725 struct obd_device *obd = exp->exp_obd;
1726 struct osp_device *osp;
1728 if (!obd->obd_set_up || obd->obd_stopping)
1731 osp = lu2osp_dev(obd->obd_lu_dev);
1734 * 1.8/2.0 behaviour is that OST being connected once at least
1735 * is considered "healthy". and one "healthy" OST is enough to
1736 * allow lustre clients to connect to MDS
1738 RETURN(!osp->opd_imp_seen_connected);
1744 static int osp_obd_set_info_async(const struct lu_env *env,
1745 struct obd_export *exp,
1746 u32 keylen, void *key,
1747 u32 vallen, void *val,
1748 struct ptlrpc_request_set *set)
1750 struct obd_device *obd = exp->exp_obd;
1751 struct obd_import *imp = obd->u.cli.cl_import;
1752 struct osp_device *osp;
1753 struct ptlrpc_request *req;
1757 if (KEY_IS(KEY_SPTLRPC_CONF)) {
1758 sptlrpc_conf_client_adapt(exp->exp_obd);
1762 LASSERT(set != NULL);
1763 if (!obd->obd_set_up || obd->obd_stopping)
1765 osp = lu2osp_dev(obd->obd_lu_dev);
1767 req = ptlrpc_request_alloc(imp, &RQF_OBD_SET_INFO);
1771 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_KEY,
1772 RCL_CLIENT, keylen);
1773 req_capsule_set_size(&req->rq_pill, &RMF_SETINFO_VAL,
1774 RCL_CLIENT, vallen);
1775 if (osp->opd_connect_mdt)
1776 rc = ptlrpc_request_pack(req, LUSTRE_MDS_VERSION, MDS_SET_INFO);
1778 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_SET_INFO);
1780 ptlrpc_request_free(req);
1784 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_KEY);
1785 memcpy(tmp, key, keylen);
1786 tmp = req_capsule_client_get(&req->rq_pill, &RMF_SETINFO_VAL);
1787 memcpy(tmp, val, vallen);
1789 ptlrpc_request_set_replen(req);
1790 ptlrpc_set_add_req(set, req);
1791 ptlrpc_check_set(NULL, set);
1796 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1797 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1798 static void osp_key_exit(const struct lu_context *ctx,
1799 struct lu_context_key *key, void *data)
1801 struct osp_thread_info *info = data;
1803 info->osi_attr.la_valid = 0;
1806 struct lu_context_key osp_thread_key = {
1807 .lct_tags = LCT_MD_THREAD,
1808 .lct_init = osp_key_init,
1809 .lct_fini = osp_key_fini,
1810 .lct_exit = osp_key_exit
1813 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1814 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1816 struct lu_context_key osp_txn_key = {
1817 .lct_tags = LCT_OSP_THREAD,
1818 .lct_init = osp_txn_key_init,
1819 .lct_fini = osp_txn_key_fini
1821 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1823 static const struct lu_device_type_operations osp_device_type_ops = {
1824 .ldto_init = osp_type_init,
1825 .ldto_fini = osp_type_fini,
1827 .ldto_start = osp_type_start,
1828 .ldto_stop = osp_type_stop,
1830 .ldto_device_alloc = osp_device_alloc,
1831 .ldto_device_free = osp_device_free,
1833 .ldto_device_fini = osp_device_fini
1836 static struct lu_device_type osp_device_type = {
1837 .ldt_tags = LU_DEVICE_DT,
1838 .ldt_name = LUSTRE_OSP_NAME,
1839 .ldt_ops = &osp_device_type_ops,
1840 .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1843 static const struct obd_ops osp_obd_device_ops = {
1844 .o_owner = THIS_MODULE,
1845 .o_add_conn = client_import_add_conn,
1846 .o_del_conn = client_import_del_conn,
1847 .o_reconnect = osp_reconnect,
1848 .o_connect = osp_obd_connect,
1849 .o_disconnect = osp_obd_disconnect,
1850 .o_get_info = osp_obd_get_info,
1851 .o_set_info_async = osp_obd_set_info_async,
1852 .o_import_event = osp_import_event,
1853 .o_iocontrol = osp_iocontrol,
1854 .o_statfs = osp_obd_statfs,
1855 .o_fid_init = client_fid_init,
1856 .o_fid_fini = client_fid_fini,
1860 * Initialize OSP module.
1862 * Register device types OSP and Light Weight Proxy (LWP) (\see lwp_dev.c)
1863 * in obd_types (\see class_obd.c). Initialize procfs for the
1864 * the OSP device. Note: OSP was called OSC before Lustre 2.4,
1865 * so for compatibility it still uses the name "osc" in procfs.
1866 * This is called at module load time.
1868 * \retval 0 0 if initialization succeeds.
1869 * \retval negative negative errno if initialization failed.
1871 static int __init osp_init(void)
1873 struct obd_type *sym;
1876 rc = lu_kmem_init(osp_caches);
1880 rc = class_register_type(&osp_obd_device_ops, NULL, false,
1881 LUSTRE_OSP_NAME, &osp_device_type);
1883 lu_kmem_fini(osp_caches);
1887 rc = class_register_type(&lwp_obd_device_ops, NULL, false,
1888 LUSTRE_LWP_NAME, &lwp_device_type);
1890 class_unregister_type(LUSTRE_OSP_NAME);
1891 lu_kmem_fini(osp_caches);
1895 /* create "osc" entry for compatibility purposes */
1896 sym = class_add_symlinks(LUSTRE_OSC_NAME, true);
1899 /* does real "osc" already exist ? */
1908 * Finalize OSP module.
1910 * This callback is called when kernel unloads OSP module from memory, and
1911 * it will deregister OSP and LWP device type from obd_types (\see class_obd.c).
1913 static void __exit osp_exit(void)
1915 struct obd_type *sym = class_search_type(LUSTRE_OSC_NAME);
1917 /* if this was never fully initialized by the osc layer
1918 * then we are responsible for freeing this obd_type
1921 /* final put if we manage this obd type */
1922 if (sym->typ_sym_filter)
1923 kobject_put(&sym->typ_kobj);
1924 /* put reference taken by class_search_type */
1925 kobject_put(&sym->typ_kobj);
1928 class_unregister_type(LUSTRE_LWP_NAME);
1929 class_unregister_type(LUSTRE_OSP_NAME);
1930 lu_kmem_fini(osp_caches);
1933 MODULE_AUTHOR("OpenSFS, Inc. <http://www.lustre.org/>");
1934 MODULE_DESCRIPTION("Lustre OSD Storage Proxy ("LUSTRE_OSP_NAME")");
1935 MODULE_VERSION(LUSTRE_VERSION_STRING);
1936 MODULE_LICENSE("GPL");
1938 module_init(osp_init);
1939 module_exit(osp_exit);