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14 * in the LICENSE file that accompanied this code).
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27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
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33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/osp/osp_dev.c
38 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
39 * Author: Mikhail Pershin <mike.pershin@intel.com>
40 * Author: Di Wang <di.wang@intel.com>
43 * The Object Storage Proxy (OSP) module provides an implementation of
44 * the DT API for remote MDTs and OSTs. Every local OSP device (or
45 * object) is a proxy for a remote OSD device (or object). Thus OSP
46 * converts DT operations into RPCs, which are sent to the OUT service
47 * on a remote target, converted back to DT operations, and
48 * executed. Of course there are many ways in which this description
49 * is inaccurate but it's a good enough mental model. OSP is used by
50 * the MDT stack in several ways:
52 * - OSP devices allocate FIDs for the stripe sub-objects of a striped
55 * - OSP objects represent the remote MDT and OST objects that are
56 * the stripes of a striped object.
58 * - OSP devices log, send, and track synchronous operations (setattr
59 * and unlink) to remote targets.
61 * - OSP objects are the bottom slice of the compound LU object
62 * representing a remote MDT object: MDT/MDD/LOD/OSP.
64 * - OSP objects are used by LFSCK to represent remote OST objects
65 * during the verification of MDT-OST consistency.
67 * - OSP devices batch idempotent requests (declare_attr_get() and
68 * declare_xattr_get()) to the remote target and cache their results.
70 * In addition the OSP layer implements a subset of the OBD device API
71 * to support being a client of a remote target, connecting to other
72 * layers, and FID allocation.
75 #define DEBUG_SUBSYSTEM S_MDS
77 #include <obd_class.h>
78 #include <lustre_ioctl.h>
79 #include <lustre_param.h>
80 #include <lustre_log.h>
82 #include "osp_internal.h"
84 /* Slab for OSP object allocation */
85 struct kmem_cache *osp_object_kmem;
87 static struct lu_kmem_descr osp_caches[] = {
89 .ckd_cache = &osp_object_kmem,
90 .ckd_name = "osp_obj",
91 .ckd_size = sizeof(struct osp_object)
99 * Implementation of lu_device_operations::ldo_object_alloc
101 * Allocates an OSP object in memory, whose FID is on the remote target.
103 * \param[in] env execution environment
104 * \param[in] hdr The header of the object stack. If it is NULL, it
105 * means the object is not built from top device, i.e.
106 * it is a sub-stripe object of striped directory or
108 * \param[in] d OSP device
110 * \retval object object being created if the creation succeed.
111 * \retval NULL NULL if the creation failed.
113 static struct lu_object *osp_object_alloc(const struct lu_env *env,
114 const struct lu_object_header *hdr,
117 struct lu_object_header *h = NULL;
118 struct osp_object *o;
121 OBD_SLAB_ALLOC_PTR_GFP(o, osp_object_kmem, GFP_NOFS);
123 l = &o->opo_obj.do_lu;
125 /* If hdr is NULL, it means the object is not built
126 * from the top dev(MDT/OST), usually it happens when
127 * building striped object, like data object on MDT or
128 * striped object for directory */
131 lu_object_header_init(h);
132 dt_object_init(&o->opo_obj, h, d);
133 lu_object_add_top(h, l);
135 dt_object_init(&o->opo_obj, h, d);
138 l->lo_ops = &osp_lu_obj_ops;
147 * Find or create the local object
149 * Finds or creates the local file referenced by \a reg_id and return the
150 * attributes of the local file.
152 * \param[in] env execution environment
153 * \param[in] osp OSP device
154 * \param[out] attr attributes of the object
155 * \param[in] reg_id the local object ID of the file. It will be used
156 * to compose a local FID{FID_SEQ_LOCAL_FILE, reg_id, 0}
157 * to identify the object.
159 * \retval object object(dt_object) found or created
160 * \retval ERR_PTR(errno) ERR_PTR(errno) if not get the object.
162 static struct dt_object
163 *osp_find_or_create_local_file(const struct lu_env *env, struct osp_device *osp,
164 struct lu_attr *attr, __u32 reg_id)
166 struct osp_thread_info *osi = osp_env_info(env);
167 struct dt_object_format dof = { 0 };
168 struct dt_object *dto;
172 lu_local_obj_fid(&osi->osi_fid, reg_id);
173 attr->la_valid = LA_MODE;
174 attr->la_mode = S_IFREG | 0644;
175 dof.dof_type = DFT_REGULAR;
176 /* Find or create the local object by osi_fid. */
177 dto = dt_find_or_create(env, osp->opd_storage, &osi->osi_fid,
182 /* Get attributes of the local object. */
183 rc = dt_attr_get(env, dto, attr, NULL);
185 CERROR("%s: can't be initialized: rc = %d\n",
186 osp->opd_obd->obd_name, rc);
187 lu_object_put(env, &dto->do_lu);
194 * Write data buffer to a local file object.
196 * \param[in] env execution environment
197 * \param[in] osp OSP device
198 * \param[in] dt_obj object written to
199 * \param[in] buf buffer containing byte array and length
200 * \param[in] offset write offset in the object in bytes
202 * \retval 0 0 if write succeed
203 * \retval -EFAULT -EFAULT if only part of buffer is written.
204 * \retval negative other negative errno if write failed.
206 static int osp_write_local_file(const struct lu_env *env,
207 struct osp_device *osp,
208 struct dt_object *dt_obj,
215 th = dt_trans_create(env, osp->opd_storage);
219 rc = dt_declare_record_write(env, dt_obj, buf, offset, th);
222 rc = dt_trans_start_local(env, osp->opd_storage, th);
226 rc = dt_record_write(env, dt_obj, buf, &offset, th);
228 dt_trans_stop(env, osp->opd_storage, th);
233 * Initialize last ID object.
235 * This function initializes the LAST_ID file, which stores the current last
236 * used id of data objects. The MDT will use the last used id and the last_seq
237 * (\see osp_init_last_seq()) to synchronize the precreate object cache with
240 * \param[in] env execution environment
241 * \param[in] osp OSP device
243 * \retval 0 0 if initialization succeed
244 * \retval negative negative errno if initialization failed
246 static int osp_init_last_objid(const struct lu_env *env, struct osp_device *osp)
248 struct osp_thread_info *osi = osp_env_info(env);
249 struct lu_fid *fid = &osp->opd_last_used_fid;
250 struct dt_object *dto;
254 dto = osp_find_or_create_local_file(env, osp, &osi->osi_attr,
257 RETURN(PTR_ERR(dto));
259 /* object will be released in device cleanup path */
260 if (osi->osi_attr.la_size >=
261 sizeof(osi->osi_id) * (osp->opd_index + 1)) {
262 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
264 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
265 if (rc != 0 && rc != -EFAULT)
269 if (rc == -EFAULT) { /* fresh LAST_ID */
271 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_oid,
273 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
278 osp->opd_last_used_oid_file = dto;
281 /* object will be released in device cleanup path */
282 CERROR("%s: can't initialize lov_objid: rc = %d\n",
283 osp->opd_obd->obd_name, rc);
284 lu_object_put(env, &dto->do_lu);
285 osp->opd_last_used_oid_file = NULL;
290 * Initialize last sequence object.
292 * This function initializes the LAST_SEQ file in the local OSD, which stores
293 * the current last used sequence of data objects. The MDT will use the last
294 * sequence and last id (\see osp_init_last_objid()) to synchronize the
295 * precreate object cache with OSTs.
297 * \param[in] env execution environment
298 * \param[in] osp OSP device
300 * \retval 0 0 if initialization succeed
301 * \retval negative negative errno if initialization failed
303 static int osp_init_last_seq(const struct lu_env *env, struct osp_device *osp)
305 struct osp_thread_info *osi = osp_env_info(env);
306 struct lu_fid *fid = &osp->opd_last_used_fid;
307 struct dt_object *dto;
311 dto = osp_find_or_create_local_file(env, osp, &osi->osi_attr,
314 RETURN(PTR_ERR(dto));
316 /* object will be released in device cleanup path */
317 if (osi->osi_attr.la_size >=
318 sizeof(osi->osi_id) * (osp->opd_index + 1)) {
319 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
321 rc = dt_record_read(env, dto, &osi->osi_lb, &osi->osi_off);
322 if (rc != 0 && rc != -EFAULT)
326 if (rc == -EFAULT) { /* fresh OSP */
328 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off, &fid->f_seq,
330 rc = osp_write_local_file(env, osp, dto, &osi->osi_lb,
335 osp->opd_last_used_seq_file = dto;
338 /* object will be released in device cleanup path */
339 CERROR("%s: can't initialize lov_seq: rc = %d\n",
340 osp->opd_obd->obd_name, rc);
341 lu_object_put(env, &dto->do_lu);
342 osp->opd_last_used_seq_file = NULL;
347 * Initialize last OID and sequence object.
349 * If the MDT is just upgraded to 2.4 from the lower version, where the
350 * LAST_SEQ file does not exist, the file will be created and IDIF sequence
351 * will be written into the file.
353 * \param[in] env execution environment
354 * \param[in] osp OSP device
356 * \retval 0 0 if initialization succeed
357 * \retval negative negative error if initialization failed
359 static int osp_last_used_init(const struct lu_env *env, struct osp_device *osp)
361 struct osp_thread_info *osi = osp_env_info(env);
365 fid_zero(&osp->opd_last_used_fid);
366 rc = osp_init_last_objid(env, osp);
368 CERROR("%s: Can not get ids %d from old objid!\n",
369 osp->opd_obd->obd_name, rc);
373 rc = osp_init_last_seq(env, osp);
375 CERROR("%s: Can not get ids %d from old objid!\n",
376 osp->opd_obd->obd_name, rc);
380 if (fid_oid(&osp->opd_last_used_fid) != 0 &&
381 fid_seq(&osp->opd_last_used_fid) == 0) {
382 /* Just upgrade from the old version,
383 * set the seq to be IDIF */
384 osp->opd_last_used_fid.f_seq =
385 fid_idif_seq(fid_oid(&osp->opd_last_used_fid),
387 osp_objseq_buf_prep(&osi->osi_lb, &osi->osi_off,
388 &osp->opd_last_used_fid.f_seq,
390 rc = osp_write_local_file(env, osp, osp->opd_last_used_seq_file,
391 &osi->osi_lb, osi->osi_off);
393 CERROR("%s : Can not write seq file: rc = %d\n",
394 osp->opd_obd->obd_name, rc);
399 if (!fid_is_zero(&osp->opd_last_used_fid) &&
400 !fid_is_sane(&osp->opd_last_used_fid)) {
401 CERROR("%s: Got invalid FID "DFID"\n", osp->opd_obd->obd_name,
402 PFID(&osp->opd_last_used_fid));
403 GOTO(out, rc = -EINVAL);
406 CDEBUG(D_INFO, "%s: Init last used fid "DFID"\n",
407 osp->opd_obd->obd_name, PFID(&osp->opd_last_used_fid));
410 if (osp->opd_last_used_oid_file != NULL) {
411 lu_object_put(env, &osp->opd_last_used_oid_file->do_lu);
412 osp->opd_last_used_oid_file = NULL;
414 if (osp->opd_last_used_seq_file != NULL) {
415 lu_object_put(env, &osp->opd_last_used_seq_file->do_lu);
416 osp->opd_last_used_seq_file = NULL;
424 * Release the last sequence and OID file objects in OSP device.
426 * \param[in] env execution environment
427 * \param[in] osp OSP device
429 static void osp_last_used_fini(const struct lu_env *env, struct osp_device *osp)
431 /* release last_used file */
432 if (osp->opd_last_used_oid_file != NULL) {
433 lu_object_put(env, &osp->opd_last_used_oid_file->do_lu);
434 osp->opd_last_used_oid_file = NULL;
437 if (osp->opd_last_used_seq_file != NULL) {
438 lu_object_put(env, &osp->opd_last_used_seq_file->do_lu);
439 osp->opd_last_used_seq_file = NULL;
444 * Disconnects the connection between OSP and its correspondent MDT or OST, and
445 * the import will be marked as inactive. It will only be called during OSP
448 * \param[in] d OSP device being disconnected
450 * \retval 0 0 if disconnection succeed
451 * \retval negative negative errno if disconnection failed
453 static int osp_disconnect(struct osp_device *d)
455 struct obd_import *imp;
458 imp = d->opd_obd->u.cli.cl_import;
460 /* Mark import deactivated now, so we don't try to reconnect if any
461 * of the cleanup RPCs fails (e.g. ldlm cancel, etc). We don't
462 * fully deactivate the import, or that would drop all requests. */
463 LASSERT(imp != NULL);
464 spin_lock(&imp->imp_lock);
465 imp->imp_deactive = 1;
466 spin_unlock(&imp->imp_lock);
468 ptlrpc_deactivate_import(imp);
470 /* Some non-replayable imports (MDS's OSCs) are pinged, so just
471 * delete it regardless. (It's safe to delete an import that was
473 (void)ptlrpc_pinger_del_import(imp);
475 rc = ptlrpc_disconnect_import(imp, 0);
477 CERROR("%s: can't disconnect: rc = %d\n",
478 d->opd_obd->obd_name, rc);
480 ptlrpc_invalidate_import(imp);
486 * Cleanup OSP, which includes disconnect import, cleanup unlink log, stop
487 * precreate threads etc.
489 * \param[in] env execution environment.
490 * \param[in] d OSP device being disconnected.
492 * \retval 0 0 if cleanup succeed
493 * \retval negative negative errno if cleanup failed
495 static int osp_shutdown(const struct lu_env *env, struct osp_device *d)
502 rc = osp_disconnect(d);
506 if (!d->opd_connect_mdt) {
507 /* stop precreate thread */
508 osp_precreate_fini(d);
510 /* release last_used file */
511 osp_last_used_fini(env, d);
514 obd_fid_fini(d->opd_obd);
520 * Implementation of osp_lu_ops::ldo_process_config
522 * This function processes config log records in OSP layer. It is usually
523 * called from the top layer of MDT stack, and goes through the stack by calling
524 * ldo_process_config of next layer.
526 * \param[in] env execution environment
527 * \param[in] dev lu_device of OSP
528 * \param[in] lcfg config log
530 * \retval 0 0 if the config log record is executed correctly.
531 * \retval negative negative errno if the record execution fails.
533 static int osp_process_config(const struct lu_env *env,
534 struct lu_device *dev, struct lustre_cfg *lcfg)
536 struct osp_device *d = lu2osp_dev(dev);
537 struct obd_device *obd = d->opd_obd;
542 switch (lcfg->lcfg_command) {
543 case LCFG_PRE_CLEANUP:
544 rc = osp_disconnect(d);
547 lu_dev_del_linkage(dev->ld_site, dev);
548 rc = osp_shutdown(env, d);
552 rc = class_process_proc_param(PARAM_OSC, obd->obd_vars,
557 /* class_process_proc_param() haven't found matching
558 * parameter and returned ENOSYS so that layer(s)
559 * below could use that. But OSP is the bottom, so
561 CERROR("%s: unknown param %s\n",
562 (char *)lustre_cfg_string(lcfg, 0),
563 (char *)lustre_cfg_string(lcfg, 1));
568 CERROR("%s: unknown command %u\n",
569 (char *)lustre_cfg_string(lcfg, 0), lcfg->lcfg_command);
578 * Implementation of osp_lu_ops::ldo_recovery_complete
580 * This function is called after recovery is finished, and OSP layer
581 * will wake up precreate thread here.
583 * \param[in] env execution environment
584 * \param[in] dev lu_device of OSP
586 * \retval 0 0 unconditionally
588 static int osp_recovery_complete(const struct lu_env *env,
589 struct lu_device *dev)
591 struct osp_device *osp = lu2osp_dev(dev);
594 osp->opd_recovery_completed = 1;
596 if (!osp->opd_connect_mdt && osp->opd_pre != NULL)
597 wake_up(&osp->opd_pre_waitq);
602 const struct lu_device_operations osp_lu_ops = {
603 .ldo_object_alloc = osp_object_alloc,
604 .ldo_process_config = osp_process_config,
605 .ldo_recovery_complete = osp_recovery_complete,
609 * Implementation of dt_device_operations::dt_statfs
611 * This function provides statfs status (for precreation) from
612 * corresponding OST. Note: this function only retrieves the status
613 * from the OSP device, and the real statfs RPC happens inside
614 * precreate thread (\see osp_statfs_update). Note: OSP for MDT does
615 * not need to retrieve statfs data for now.
617 * \param[in] env execution environment.
618 * \param[in] dev dt_device of OSP.
619 * \param[out] sfs holds the retrieved statfs data.
621 * \retval 0 0 statfs data was retrieved successfully or
622 * retrieval was not needed
623 * \retval negative negative errno if get statfs failed.
625 static int osp_statfs(const struct lu_env *env, struct dt_device *dev,
626 struct obd_statfs *sfs)
628 struct osp_device *d = dt2osp_dev(dev);
632 if (unlikely(d->opd_imp_active == 0))
635 if (d->opd_pre == NULL)
638 /* return recently updated data */
639 *sfs = d->opd_statfs;
642 * layer above osp (usually lod) can use ffree to estimate
643 * how many objects are available for immediate creation
645 spin_lock(&d->opd_pre_lock);
646 LASSERTF(fid_seq(&d->opd_pre_last_created_fid) ==
647 fid_seq(&d->opd_pre_used_fid),
648 "last_created "DFID", next_fid "DFID"\n",
649 PFID(&d->opd_pre_last_created_fid),
650 PFID(&d->opd_pre_used_fid));
651 sfs->os_fprecreated = fid_oid(&d->opd_pre_last_created_fid) -
652 fid_oid(&d->opd_pre_used_fid);
653 sfs->os_fprecreated -= d->opd_pre_reserved;
654 spin_unlock(&d->opd_pre_lock);
656 LASSERT(sfs->os_fprecreated <= OST_MAX_PRECREATE * 2);
658 CDEBUG(D_OTHER, "%s: "LPU64" blocks, "LPU64" free, "LPU64" avail, "
659 LPU64" files, "LPU64" free files\n", d->opd_obd->obd_name,
660 sfs->os_blocks, sfs->os_bfree, sfs->os_bavail,
661 sfs->os_files, sfs->os_ffree);
665 static int osp_sync_timeout(void *data)
671 * Implementation of dt_device_operations::dt_sync
673 * This function synchronizes the OSP cache to the remote target. It wakes
674 * up unlink log threads and sends out unlink records to the remote OST.
676 * \param[in] env execution environment
677 * \param[in] dev dt_device of OSP
679 * \retval 0 0 if synchronization succeeds
680 * \retval negative negative errno if synchronization fails
682 static int osp_sync(const struct lu_env *env, struct dt_device *dev)
684 struct osp_device *d = dt2osp_dev(dev);
686 struct l_wait_info lwi = { 0 };
687 unsigned long id, old;
689 unsigned long start = cfs_time_current();
692 if (unlikely(d->opd_imp_active == 0))
695 id = d->opd_syn_last_used_id;
696 down_write(&d->opd_async_updates_rwsem);
698 CDEBUG(D_OTHER, "%s: async updates %d\n", d->opd_obd->obd_name,
699 atomic_read(&d->opd_async_updates_count));
701 /* make sure the connection is fine */
702 expire = cfs_time_shift(obd_timeout);
703 lwi = LWI_TIMEOUT(expire - cfs_time_current(), osp_sync_timeout, d);
704 rc = l_wait_event(d->opd_syn_barrier_waitq,
705 atomic_read(&d->opd_async_updates_count) == 0,
707 up_write(&d->opd_async_updates_rwsem);
711 CDEBUG(D_CACHE, "%s: id: used %lu, processed %lu\n",
712 d->opd_obd->obd_name, id, d->opd_syn_last_processed_id);
714 /* wait till all-in-line are processed */
715 while (d->opd_syn_last_processed_id < id) {
717 old = d->opd_syn_last_processed_id;
719 /* make sure the connection is fine */
720 expire = cfs_time_shift(obd_timeout);
721 lwi = LWI_TIMEOUT(expire - cfs_time_current(),
722 osp_sync_timeout, d);
723 l_wait_event(d->opd_syn_barrier_waitq,
724 d->opd_syn_last_processed_id >= id,
727 if (d->opd_syn_last_processed_id >= id)
730 if (d->opd_syn_last_processed_id != old) {
731 /* some progress have been made,
736 /* no changes and expired, something is wrong */
737 GOTO(out, rc = -ETIMEDOUT);
740 /* block new processing (barrier>0 - few callers are possible */
741 atomic_inc(&d->opd_syn_barrier);
743 CDEBUG(D_CACHE, "%s: %u in flight\n", d->opd_obd->obd_name,
744 d->opd_syn_rpc_in_flight);
746 /* wait till all-in-flight are replied, so executed by the target */
747 /* XXX: this is used by LFSCK at the moment, which doesn't require
748 * all the changes to be committed, but in general it'd be
749 * better to wait till commit */
750 while (d->opd_syn_rpc_in_flight > 0) {
752 old = d->opd_syn_rpc_in_flight;
754 expire = cfs_time_shift(obd_timeout);
755 lwi = LWI_TIMEOUT(expire - cfs_time_current(),
756 osp_sync_timeout, d);
757 l_wait_event(d->opd_syn_barrier_waitq,
758 d->opd_syn_rpc_in_flight == 0, &lwi);
760 if (d->opd_syn_rpc_in_flight == 0)
763 if (d->opd_syn_rpc_in_flight != old) {
764 /* some progress have been made */
768 /* no changes and expired, something is wrong */
769 GOTO(out, rc = -ETIMEDOUT);
773 /* resume normal processing (barrier=0) */
774 atomic_dec(&d->opd_syn_barrier);
775 __osp_sync_check_for_work(d);
777 CDEBUG(D_CACHE, "%s: done in %lu: rc = %d\n", d->opd_obd->obd_name,
778 cfs_time_current() - start, rc);
783 const struct dt_device_operations osp_dt_ops = {
784 .dt_statfs = osp_statfs,
786 .dt_trans_create = osp_trans_create,
787 .dt_trans_start = osp_trans_start,
788 .dt_trans_stop = osp_trans_stop,
792 * Connect OSP to local OSD.
794 * Locate the local OSD referenced by \a nextdev and connect to it. Sometimes,
795 * OSP needs to access the local OSD to store some information. For example,
796 * during precreate, it needs to update last used OID and sequence file
797 * (LAST_SEQ) in local OSD.
799 * \param[in] env execution environment
800 * \param[in] osp OSP device
801 * \param[in] nextdev the name of local OSD
803 * \retval 0 0 connection succeeded
804 * \retval negative negative errno connection failed
806 static int osp_connect_to_osd(const struct lu_env *env, struct osp_device *osp,
809 struct obd_connect_data *data = NULL;
810 struct obd_device *obd;
815 LASSERT(osp->opd_storage_exp == NULL);
821 obd = class_name2obd(nextdev);
823 CERROR("%s: can't locate next device: %s\n",
824 osp->opd_obd->obd_name, nextdev);
825 GOTO(out, rc = -ENOTCONN);
828 rc = obd_connect(env, &osp->opd_storage_exp, obd, &obd->obd_uuid, data,
831 CERROR("%s: cannot connect to next dev %s: rc = %d\n",
832 osp->opd_obd->obd_name, nextdev, rc);
836 osp->opd_dt_dev.dd_lu_dev.ld_site =
837 osp->opd_storage_exp->exp_obd->obd_lu_dev->ld_site;
838 LASSERT(osp->opd_dt_dev.dd_lu_dev.ld_site);
839 osp->opd_storage = lu2dt_dev(osp->opd_storage_exp->exp_obd->obd_lu_dev);
847 * Initialize OSP device according to the parameters in the configuration
850 * Reconstruct the local device name from the configuration profile, and
851 * initialize necessary threads and structures according to the OSP type
854 * Since there is no record in the MDT configuration for the local disk
855 * device, we have to extract this from elsewhere in the profile.
856 * The only information we get at setup is from the OSC records:
857 * setup 0:{fsname}-OSTxxxx-osc[-MDTxxxx] 1:lustre-OST0000_UUID 2:NID
859 * Note: configs generated by Lustre 1.8 are missing the -MDTxxxx part,
860 * so, we need to reconstruct the name of the underlying OSD from this:
861 * {fsname}-{svname}-osd, for example "lustre-MDT0000-osd".
863 * \param[in] env execution environment
864 * \param[in] osp OSP device
865 * \param[in] ldt lu device type of OSP
866 * \param[in] cfg configuration log
868 * \retval 0 0 if OSP initialization succeeded.
869 * \retval negative negative errno if OSP initialization failed.
871 static int osp_init0(const struct lu_env *env, struct osp_device *osp,
872 struct lu_device_type *ldt, struct lustre_cfg *cfg)
874 struct obd_device *obd;
875 struct obd_import *imp;
877 char *src, *tgt, *mdt, *osdname = NULL;
883 mutex_init(&osp->opd_async_requests_mutex);
884 INIT_LIST_HEAD(&osp->opd_async_updates);
885 init_rwsem(&osp->opd_async_updates_rwsem);
886 atomic_set(&osp->opd_async_updates_count, 0);
888 obd = class_name2obd(lustre_cfg_string(cfg, 0));
890 CERROR("Cannot find obd with name %s\n",
891 lustre_cfg_string(cfg, 0));
896 src = lustre_cfg_string(cfg, 0);
900 tgt = strrchr(src, '-');
902 CERROR("%s: invalid target name %s: rc = %d\n",
903 osp->opd_obd->obd_name, lustre_cfg_string(cfg, 0),
908 if (strncmp(tgt, "-osc", 4) == 0) {
909 /* Old OSC name fsname-OSTXXXX-osc */
910 for (tgt--; tgt > src && *tgt != '-'; tgt--)
913 CERROR("%s: invalid target name %s: rc = %d\n",
914 osp->opd_obd->obd_name,
915 lustre_cfg_string(cfg, 0), -EINVAL);
919 if (strncmp(tgt, "-OST", 4) != 0) {
920 CERROR("%s: invalid target name %s: rc = %d\n",
921 osp->opd_obd->obd_name,
922 lustre_cfg_string(cfg, 0), -EINVAL);
926 idx = simple_strtol(tgt + 4, &mdt, 16);
927 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
928 CERROR("%s: invalid OST index in '%s': rc = %d\n",
929 osp->opd_obd->obd_name, src, -EINVAL);
932 osp->opd_index = idx;
936 /* New OSC name fsname-OSTXXXX-osc-MDTXXXX */
937 if (strncmp(tgt, "-MDT", 4) != 0 &&
938 strncmp(tgt, "-OST", 4) != 0) {
939 CERROR("%s: invalid target name %s: rc = %d\n",
940 osp->opd_obd->obd_name,
941 lustre_cfg_string(cfg, 0), -EINVAL);
945 idx = simple_strtol(tgt + 4, &mdt, 16);
946 if (*mdt != '\0' || idx > INT_MAX || idx < 0) {
947 CERROR("%s: invalid OST index in '%s': rc = %d\n",
948 osp->opd_obd->obd_name, src, -EINVAL);
952 /* Get MDT index from the name and set it to opd_group,
953 * which will be used by OSP to connect with OST */
954 osp->opd_group = idx;
955 if (tgt - src <= 12) {
956 CERROR("%s: invalid mdt index from %s: rc =%d\n",
957 osp->opd_obd->obd_name,
958 lustre_cfg_string(cfg, 0), -EINVAL);
962 if (strncmp(tgt - 12, "-MDT", 4) == 0)
963 osp->opd_connect_mdt = 1;
965 idx = simple_strtol(tgt - 8, &mdt, 16);
966 if (mdt[0] != '-' || idx > INT_MAX || idx < 0) {
967 CERROR("%s: invalid OST index in '%s': rc =%d\n",
968 osp->opd_obd->obd_name, src, -EINVAL);
972 osp->opd_index = idx;
973 idx = tgt - src - 12;
975 /* check the fsname length, and after this everything else will fit */
976 if (idx > MTI_NAME_MAXLEN) {
977 CERROR("%s: fsname too long in '%s': rc = %d\n",
978 osp->opd_obd->obd_name, src, -EINVAL);
982 OBD_ALLOC(osdname, MAX_OBD_NAME);
986 memcpy(osdname, src, idx); /* copy just the fsname part */
989 mdt = strstr(mdt, "-MDT");
990 if (mdt == NULL) /* 1.8 configs don't have "-MDT0000" at the end */
991 strcat(osdname, "-MDT0000");
993 strcat(osdname, mdt);
994 strcat(osdname, "-osd");
995 CDEBUG(D_HA, "%s: connect to %s (%s)\n", obd->obd_name, osdname, src);
997 if (osp->opd_connect_mdt) {
998 struct client_obd *cli = &osp->opd_obd->u.cli;
1000 OBD_ALLOC(cli->cl_rpc_lock, sizeof(*cli->cl_rpc_lock));
1001 if (!cli->cl_rpc_lock)
1002 GOTO(out_fini, rc = -ENOMEM);
1003 osp_init_rpc_lock(cli->cl_rpc_lock);
1006 osp->opd_dt_dev.dd_lu_dev.ld_ops = &osp_lu_ops;
1007 osp->opd_dt_dev.dd_ops = &osp_dt_ops;
1009 obd->obd_lu_dev = &osp->opd_dt_dev.dd_lu_dev;
1011 rc = osp_connect_to_osd(env, osp, osdname);
1015 rc = ptlrpcd_addref();
1017 GOTO(out_disconnect, rc);
1019 rc = client_obd_setup(obd, cfg);
1021 CERROR("%s: can't setup obd: rc = %d\n", osp->opd_obd->obd_name,
1026 osp_lprocfs_init(osp);
1028 rc = obd_fid_init(osp->opd_obd, NULL, osp->opd_connect_mdt ?
1029 LUSTRE_SEQ_METADATA : LUSTRE_SEQ_DATA);
1031 CERROR("%s: fid init error: rc = %d\n",
1032 osp->opd_obd->obd_name, rc);
1036 if (!osp->opd_connect_mdt) {
1037 /* Initialize last id from the storage - will be
1038 * used in orphan cleanup. */
1039 rc = osp_last_used_init(env, osp);
1044 /* Initialize precreation thread, it handles new
1045 * connections as well. */
1046 rc = osp_init_precreate(osp);
1048 GOTO(out_last_used, rc);
1052 * Initialize synhronization mechanism taking
1053 * care of propogating changes to OST in near
1054 * transactional manner.
1056 rc = osp_sync_init(env, osp);
1058 GOTO(out_precreat, rc);
1061 * Initiate connect to OST
1063 ll_generate_random_uuid(uuid);
1064 class_uuid_unparse(uuid, &osp->opd_cluuid);
1066 imp = obd->u.cli.cl_import;
1068 rc = ptlrpc_init_import(imp);
1072 OBD_FREE(osdname, MAX_OBD_NAME);
1076 /* stop sync thread */
1079 /* stop precreate thread */
1080 if (!osp->opd_connect_mdt)
1081 osp_precreate_fini(osp);
1083 if (!osp->opd_connect_mdt)
1084 osp_last_used_fini(env, osp);
1086 obd_fid_fini(osp->opd_obd);
1088 ptlrpc_lprocfs_unregister_obd(obd);
1089 lprocfs_obd_cleanup(obd);
1090 if (osp->opd_symlink)
1091 lprocfs_remove(&osp->opd_symlink);
1092 client_obd_cleanup(obd);
1096 if (osp->opd_connect_mdt) {
1097 struct client_obd *cli = &osp->opd_obd->u.cli;
1098 if (cli->cl_rpc_lock != NULL) {
1099 OBD_FREE_PTR(cli->cl_rpc_lock);
1100 cli->cl_rpc_lock = NULL;
1103 obd_disconnect(osp->opd_storage_exp);
1106 OBD_FREE(osdname, MAX_OBD_NAME);
1111 * Implementation of lu_device_type_operations::ldto_device_free
1113 * Free the OSP device in memory. No return value is needed for now,
1114 * so always return NULL to comply with the interface.
1116 * \param[in] env execution environment
1117 * \param[in] lu lu_device of OSP
1119 * \retval NULL NULL unconditionally
1121 static struct lu_device *osp_device_free(const struct lu_env *env,
1122 struct lu_device *lu)
1124 struct osp_device *osp = lu2osp_dev(lu);
1126 if (atomic_read(&lu->ld_ref) && lu->ld_site) {
1127 LIBCFS_DEBUG_MSG_DATA_DECL(msgdata, D_ERROR, NULL);
1128 lu_site_print(env, lu->ld_site, &msgdata, lu_cdebug_printer);
1130 dt_device_fini(&osp->opd_dt_dev);
1137 * Implementation of lu_device_type_operations::ldto_device_alloc
1139 * This function allocates and initializes OSP device in memory according to
1142 * \param[in] env execution environment
1143 * \param[in] type device type of OSP
1144 * \param[in] lcfg config log
1146 * \retval pointer the pointer of allocated OSP if succeed.
1147 * \retval ERR_PTR(errno) ERR_PTR(errno) if failed.
1149 static struct lu_device *osp_device_alloc(const struct lu_env *env,
1150 struct lu_device_type *type,
1151 struct lustre_cfg *lcfg)
1153 struct osp_device *osp;
1154 struct lu_device *ld;
1158 ld = ERR_PTR(-ENOMEM);
1162 ld = osp2lu_dev(osp);
1163 dt_device_init(&osp->opd_dt_dev, type);
1164 rc = osp_init0(env, osp, type, lcfg);
1166 osp_device_free(env, ld);
1174 * Implementation of lu_device_type_operations::ldto_device_fini
1176 * This function cleans up the OSP device, i.e. release and free those
1177 * attached items in osp_device.
1179 * \param[in] env execution environment
1180 * \param[in] ld lu_device of OSP
1182 * \retval NULL NULL if cleanup succeeded.
1183 * \retval ERR_PTR(errno) ERR_PTR(errno) if cleanup failed.
1185 static struct lu_device *osp_device_fini(const struct lu_env *env,
1186 struct lu_device *ld)
1188 struct osp_device *osp = lu2osp_dev(ld);
1189 struct obd_import *imp;
1194 if (osp->opd_async_requests != NULL) {
1195 dt_update_request_destroy(osp->opd_async_requests);
1196 osp->opd_async_requests = NULL;
1199 if (osp->opd_storage_exp)
1200 obd_disconnect(osp->opd_storage_exp);
1202 imp = osp->opd_obd->u.cli.cl_import;
1204 if (imp->imp_rq_pool) {
1205 ptlrpc_free_rq_pool(imp->imp_rq_pool);
1206 imp->imp_rq_pool = NULL;
1209 if (osp->opd_symlink)
1210 lprocfs_remove(&osp->opd_symlink);
1212 LASSERT(osp->opd_obd);
1213 ptlrpc_lprocfs_unregister_obd(osp->opd_obd);
1214 lprocfs_obd_cleanup(osp->opd_obd);
1216 if (osp->opd_connect_mdt) {
1217 struct client_obd *cli = &osp->opd_obd->u.cli;
1218 if (cli->cl_rpc_lock != NULL) {
1219 OBD_FREE_PTR(cli->cl_rpc_lock);
1220 cli->cl_rpc_lock = NULL;
1224 rc = client_obd_cleanup(osp->opd_obd);
1227 RETURN(ERR_PTR(rc));
1236 * Implementation of obd_ops::o_reconnect
1238 * This function is empty and does not need to do anything for now.
1240 static int osp_reconnect(const struct lu_env *env,
1241 struct obd_export *exp, struct obd_device *obd,
1242 struct obd_uuid *cluuid,
1243 struct obd_connect_data *data,
1250 * Implementation of obd_ops::o_connect
1252 * Connect OSP to the remote target (MDT or OST). Allocate the
1253 * export and return it to the LOD, which calls this function
1254 * for each OSP to connect it to the remote target. This function
1255 * is currently only called once per OSP.
1257 * \param[in] env execution environment
1258 * \param[out] exp export connected to OSP
1259 * \param[in] obd OSP device
1260 * \param[in] cluuid OSP device client uuid
1261 * \param[in] data connect_data to be used to connect to the remote
1263 * \param[in] localdata necessary for the API interface, but not used in
1266 * \retval 0 0 if the connection succeeded.
1267 * \retval negative negative errno if the connection failed.
1269 static int osp_obd_connect(const struct lu_env *env, struct obd_export **exp,
1270 struct obd_device *obd, struct obd_uuid *cluuid,
1271 struct obd_connect_data *data, void *localdata)
1273 struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
1274 struct obd_connect_data *ocd;
1275 struct obd_import *imp;
1276 struct lustre_handle conn;
1281 CDEBUG(D_CONFIG, "connect #%d\n", osp->opd_connects);
1283 rc = class_connect(&conn, obd, cluuid);
1287 *exp = class_conn2export(&conn);
1288 /* Why should there ever be more than 1 connect? */
1289 osp->opd_connects++;
1290 LASSERT(osp->opd_connects == 1);
1292 osp->opd_exp = *exp;
1294 imp = osp->opd_obd->u.cli.cl_import;
1295 imp->imp_dlm_handle = conn;
1297 LASSERT(data != NULL);
1298 LASSERT(data->ocd_connect_flags & OBD_CONNECT_INDEX);
1299 ocd = &imp->imp_connect_data;
1302 imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
1304 ocd->ocd_version = LUSTRE_VERSION_CODE;
1305 ocd->ocd_index = data->ocd_index;
1306 imp->imp_connect_flags_orig = ocd->ocd_connect_flags;
1308 rc = ptlrpc_connect_import(imp);
1310 CERROR("%s: can't connect obd: rc = %d\n", obd->obd_name, rc);
1314 ptlrpc_pinger_add_import(imp);
1320 * Implementation of obd_ops::o_disconnect
1322 * Disconnect the export for the OSP. This is called by LOD to release the
1323 * OSP during cleanup (\see lod_del_device()). The OSP will be released after
1324 * the export is released.
1326 * \param[in] exp export to be disconnected.
1328 * \retval 0 0 if disconnection succeed
1329 * \retval negative negative errno if disconnection failed
1331 static int osp_obd_disconnect(struct obd_export *exp)
1333 struct obd_device *obd = exp->exp_obd;
1334 struct osp_device *osp = lu2osp_dev(obd->obd_lu_dev);
1338 /* Only disconnect the underlying layers on the final disconnect. */
1339 LASSERT(osp->opd_connects == 1);
1340 osp->opd_connects--;
1342 rc = class_disconnect(exp);
1344 CERROR("%s: class disconnect error: rc = %d\n",
1349 /* destroy the device */
1350 class_manual_cleanup(obd);
1356 * Implementation of obd_ops::o_statfs
1358 * Send a RPC to the remote target to get statfs status. This is only used
1359 * in lprocfs helpers by obd_statfs.
1361 * \param[in] env execution environment
1362 * \param[in] exp connection state from this OSP to the parent (LOD)
1364 * \param[out] osfs hold the statfs result
1365 * \param[in] unused Not used in this function for now
1366 * \param[in] flags flags to indicate how OSP will issue the RPC
1368 * \retval 0 0 if statfs succeeded.
1369 * \retval negative negative errno if statfs failed.
1371 static int osp_obd_statfs(const struct lu_env *env, struct obd_export *exp,
1372 struct obd_statfs *osfs, __u64 unused, __u32 flags)
1374 struct obd_statfs *msfs;
1375 struct ptlrpc_request *req;
1376 struct obd_import *imp = NULL;
1381 /* Since the request might also come from lprocfs, so we need
1382 * sync this with client_disconnect_export Bug15684 */
1383 down_read(&exp->exp_obd->u.cli.cl_sem);
1384 if (exp->exp_obd->u.cli.cl_import)
1385 imp = class_import_get(exp->exp_obd->u.cli.cl_import);
1386 up_read(&exp->exp_obd->u.cli.cl_sem);
1390 req = ptlrpc_request_alloc(imp, &RQF_OST_STATFS);
1392 class_import_put(imp);
1397 rc = ptlrpc_request_pack(req, LUSTRE_OST_VERSION, OST_STATFS);
1399 ptlrpc_request_free(req);
1402 ptlrpc_request_set_replen(req);
1403 req->rq_request_portal = OST_CREATE_PORTAL;
1404 ptlrpc_at_set_req_timeout(req);
1406 if (flags & OBD_STATFS_NODELAY) {
1407 /* procfs requests not want stat in wait for avoid deadlock */
1408 req->rq_no_resend = 1;
1409 req->rq_no_delay = 1;
1412 rc = ptlrpc_queue_wait(req);
1416 msfs = req_capsule_server_get(&req->rq_pill, &RMF_OBD_STATFS);
1418 GOTO(out, rc = -EPROTO);
1424 ptlrpc_req_finished(req);
1429 * Prepare fid client.
1431 * This function prepares the FID client for the OSP. It will check and assign
1432 * the export (to MDT0) for its FID client, so OSP can allocate super sequence
1433 * or lookup sequence in FLDB of MDT0.
1435 * \param[in] osp OSP device
1437 static void osp_prepare_fid_client(struct osp_device *osp)
1439 LASSERT(osp->opd_obd->u.cli.cl_seq != NULL);
1440 if (osp->opd_obd->u.cli.cl_seq->lcs_exp != NULL)
1443 LASSERT(osp->opd_exp != NULL);
1444 osp->opd_obd->u.cli.cl_seq->lcs_exp =
1445 class_export_get(osp->opd_exp);
1449 * Implementation of obd_ops::o_import_event
1451 * This function is called when some related import event happens. It will
1452 * mark the necessary flags according to the event and notify the necessary
1453 * threads (mainly precreate thread).
1455 * \param[in] obd OSP OBD device
1456 * \param[in] imp import attached from OSP to remote (OST/MDT) service
1457 * \param[in] event event related to remote service (IMP_EVENT_*)
1459 * \retval 0 0 if the event handling succeeded.
1460 * \retval negative negative errno if the event handling failed.
1462 static int osp_import_event(struct obd_device *obd, struct obd_import *imp,
1463 enum obd_import_event event)
1465 struct osp_device *d = lu2osp_dev(obd->obd_lu_dev);
1468 case IMP_EVENT_DISCON:
1469 d->opd_got_disconnected = 1;
1470 d->opd_imp_connected = 0;
1471 if (d->opd_connect_mdt)
1474 if (d->opd_pre != NULL) {
1475 osp_pre_update_status(d, -ENODEV);
1476 wake_up(&d->opd_pre_waitq);
1479 CDEBUG(D_HA, "got disconnected\n");
1481 case IMP_EVENT_INACTIVE:
1482 d->opd_imp_active = 0;
1483 if (d->opd_connect_mdt)
1486 if (d->opd_pre != NULL) {
1487 osp_pre_update_status(d, -ENODEV);
1488 wake_up(&d->opd_pre_waitq);
1491 CDEBUG(D_HA, "got inactive\n");
1493 case IMP_EVENT_ACTIVE:
1494 d->opd_imp_active = 1;
1496 osp_prepare_fid_client(d);
1497 if (d->opd_got_disconnected)
1498 d->opd_new_connection = 1;
1499 d->opd_imp_connected = 1;
1500 d->opd_imp_seen_connected = 1;
1501 if (d->opd_connect_mdt)
1504 if (d->opd_pre != NULL)
1505 wake_up(&d->opd_pre_waitq);
1507 __osp_sync_check_for_work(d);
1508 CDEBUG(D_HA, "got connected\n");
1510 case IMP_EVENT_INVALIDATE:
1511 if (obd->obd_namespace == NULL)
1513 ldlm_namespace_cleanup(obd->obd_namespace, LDLM_FL_LOCAL_ONLY);
1516 case IMP_EVENT_DEACTIVATE:
1517 case IMP_EVENT_ACTIVATE:
1520 CERROR("%s: unsupported import event: %#x\n",
1521 obd->obd_name, event);
1527 * Implementation of obd_ops: o_iocontrol
1529 * This function is the ioctl handler for OSP. Note: lctl will access the OSP
1530 * directly by ioctl, instead of through the MDS stack.
1532 * param[in] cmd ioctl command.
1533 * param[in] exp export of this OSP.
1534 * param[in] len data length of \a karg.
1535 * param[in] karg input argument which is packed as
1537 * param[out] uarg pointer to userspace buffer (must access by
1540 * \retval 0 0 if the ioctl handling succeeded.
1541 * \retval negative negative errno if the ioctl handling failed.
1543 static int osp_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1544 void *karg, void *uarg)
1546 struct obd_device *obd = exp->exp_obd;
1547 struct osp_device *d;
1548 struct obd_ioctl_data *data = karg;
1553 LASSERT(obd->obd_lu_dev);
1554 d = lu2osp_dev(obd->obd_lu_dev);
1555 LASSERT(d->opd_dt_dev.dd_ops == &osp_dt_ops);
1557 if (!try_module_get(THIS_MODULE)) {
1558 CERROR("%s: cannot get module '%s'\n", obd->obd_name,
1559 module_name(THIS_MODULE));
1564 case OBD_IOC_CLIENT_RECOVER:
1565 rc = ptlrpc_recover_import(obd->u.cli.cl_import,
1566 data->ioc_inlbuf1, 0);
1570 case IOC_OSC_SET_ACTIVE:
1571 rc = ptlrpc_set_import_active(obd->u.cli.cl_import,
1574 case OBD_IOC_PING_TARGET:
1575 rc = ptlrpc_obd_ping(obd);
1578 CERROR("%s: unrecognized ioctl %#x by %s\n", obd->obd_name,
1579 cmd, current_comm());
1582 module_put(THIS_MODULE);
1587 * Implementation of obd_ops::o_get_info
1589 * Retrieve information by key. Retrieval starts from the top layer
1590 * (MDT) of the MDS stack and traverses the stack by calling the
1591 * obd_get_info() method of the next sub-layer.
1593 * \param[in] env execution environment
1594 * \param[in] exp export of this OSP
1595 * \param[in] keylen length of \a key
1596 * \param[in] key the key
1597 * \param[out] vallen length of \a val
1598 * \param[out] val holds the value returned by the key
1599 * \param[in] unused necessary for the interface but unused
1601 * \retval 0 0 if getting information succeeded.
1602 * \retval negative negative errno if getting information failed.
1604 static int osp_obd_get_info(const struct lu_env *env, struct obd_export *exp,
1605 __u32 keylen, void *key, __u32 *vallen, void *val,
1606 struct lov_stripe_md *unused)
1610 if (KEY_IS(KEY_OSP_CONNECTED)) {
1611 struct obd_device *obd = exp->exp_obd;
1612 struct osp_device *osp;
1614 if (!obd->obd_set_up || obd->obd_stopping)
1617 osp = lu2osp_dev(obd->obd_lu_dev);
1620 * 1.8/2.0 behaviour is that OST being connected once at least
1621 * is considered "healthy". and one "healthy" OST is enough to
1622 * allow lustre clients to connect to MDS
1624 RETURN(!osp->opd_imp_seen_connected);
1631 * Implementation of obd_ops: o_fid_alloc
1633 * Allocate a FID. There are two cases in which OSP performs
1636 * 1. FID precreation for data objects, which is done in
1637 * osp_precreate_fids() instead of this function.
1638 * 2. FID allocation for each sub-stripe of a striped directory.
1639 * Similar to other FID clients, OSP requests the sequence
1640 * from its corresponding remote MDT, which in turn requests
1641 * sequences from the sequence controller (MDT0).
1643 * \param[in] env execution environment
1644 * \param[in] exp export of the OSP
1645 * \param[out] fid FID being allocated
1646 * \param[in] unused necessary for the interface but unused.
1648 * \retval 0 0 FID allocated successfully.
1649 * \retval 1 1 FID allocated successfully and new sequence
1650 * requested from seq meta server
1651 * \retval negative negative errno if FID allocation failed.
1653 static int osp_fid_alloc(const struct lu_env *env, struct obd_export *exp,
1654 struct lu_fid *fid, struct md_op_data *unused)
1656 struct client_obd *cli = &exp->exp_obd->u.cli;
1657 struct osp_device *osp = lu2osp_dev(exp->exp_obd->obd_lu_dev);
1658 struct lu_client_seq *seq = cli->cl_seq;
1661 LASSERT(osp->opd_obd->u.cli.cl_seq != NULL);
1662 /* Sigh, fid client is not ready yet */
1663 if (osp->opd_obd->u.cli.cl_seq->lcs_exp == NULL)
1666 RETURN(seq_client_alloc_fid(env, seq, fid));
1669 /* context key constructor/destructor: mdt_key_init, mdt_key_fini */
1670 LU_KEY_INIT_FINI(osp, struct osp_thread_info);
1671 static void osp_key_exit(const struct lu_context *ctx,
1672 struct lu_context_key *key, void *data)
1674 struct osp_thread_info *info = data;
1676 info->osi_attr.la_valid = 0;
1679 struct lu_context_key osp_thread_key = {
1680 .lct_tags = LCT_MD_THREAD,
1681 .lct_init = osp_key_init,
1682 .lct_fini = osp_key_fini,
1683 .lct_exit = osp_key_exit
1686 /* context key constructor/destructor: mdt_txn_key_init, mdt_txn_key_fini */
1687 LU_KEY_INIT_FINI(osp_txn, struct osp_txn_info);
1689 struct lu_context_key osp_txn_key = {
1690 .lct_tags = LCT_OSP_THREAD | LCT_TX_HANDLE,
1691 .lct_init = osp_txn_key_init,
1692 .lct_fini = osp_txn_key_fini
1694 LU_TYPE_INIT_FINI(osp, &osp_thread_key, &osp_txn_key);
1696 static struct lu_device_type_operations osp_device_type_ops = {
1697 .ldto_init = osp_type_init,
1698 .ldto_fini = osp_type_fini,
1700 .ldto_start = osp_type_start,
1701 .ldto_stop = osp_type_stop,
1703 .ldto_device_alloc = osp_device_alloc,
1704 .ldto_device_free = osp_device_free,
1706 .ldto_device_fini = osp_device_fini
1709 static struct lu_device_type osp_device_type = {
1710 .ldt_tags = LU_DEVICE_DT,
1711 .ldt_name = LUSTRE_OSP_NAME,
1712 .ldt_ops = &osp_device_type_ops,
1713 .ldt_ctx_tags = LCT_MD_THREAD | LCT_DT_THREAD,
1716 static struct obd_ops osp_obd_device_ops = {
1717 .o_owner = THIS_MODULE,
1718 .o_add_conn = client_import_add_conn,
1719 .o_del_conn = client_import_del_conn,
1720 .o_reconnect = osp_reconnect,
1721 .o_connect = osp_obd_connect,
1722 .o_disconnect = osp_obd_disconnect,
1723 .o_get_info = osp_obd_get_info,
1724 .o_import_event = osp_import_event,
1725 .o_iocontrol = osp_iocontrol,
1726 .o_statfs = osp_obd_statfs,
1727 .o_fid_init = client_fid_init,
1728 .o_fid_fini = client_fid_fini,
1729 .o_fid_alloc = osp_fid_alloc,
1732 struct llog_operations osp_mds_ost_orig_logops;
1735 * Initialize OSP module.
1737 * Register device types OSP and Light Weight Proxy (LWP) (\see lwp_dev.c)
1738 * in obd_types (\see class_obd.c). Initialize procfs for the
1739 * the OSP device. Note: OSP was called OSC before Lustre 2.4,
1740 * so for compatibility it still uses the name "osc" in procfs.
1741 * This is called at module load time.
1743 * \retval 0 0 if initialization succeeds.
1744 * \retval negative negative errno if initialization failed.
1746 static int __init osp_mod_init(void)
1748 struct obd_type *type;
1751 rc = lu_kmem_init(osp_caches);
1756 rc = class_register_type(&osp_obd_device_ops, NULL, true, NULL,
1757 LUSTRE_OSP_NAME, &osp_device_type);
1759 lu_kmem_fini(osp_caches);
1763 rc = class_register_type(&lwp_obd_device_ops, NULL, true, NULL,
1764 LUSTRE_LWP_NAME, &lwp_device_type);
1766 class_unregister_type(LUSTRE_OSP_NAME);
1767 lu_kmem_fini(osp_caches);
1771 /* Note: add_rec/delcare_add_rec will be only used by catalogs */
1772 osp_mds_ost_orig_logops = llog_osd_ops;
1773 osp_mds_ost_orig_logops.lop_add = llog_cat_add_rec;
1774 osp_mds_ost_orig_logops.lop_declare_add = llog_cat_declare_add_rec;
1776 /* create "osc" entry in procfs for compatibility purposes */
1777 type = class_search_type(LUSTRE_OSC_NAME);
1778 if (type != NULL && type->typ_procroot != NULL)
1781 type = class_search_type(LUSTRE_OSP_NAME);
1782 type->typ_procsym = lprocfs_register("osc", proc_lustre_root,
1784 if (IS_ERR(type->typ_procsym)) {
1785 CERROR("osp: can't create compat entry \"osc\": %d\n",
1786 (int) PTR_ERR(type->typ_procsym));
1787 type->typ_procsym = NULL;
1793 * Finalize OSP module.
1795 * This callback is called when kernel unloads OSP module from memory, and
1796 * it will deregister OSP and LWP device type from obd_types (\see class_obd.c).
1798 static void __exit osp_mod_exit(void)
1800 class_unregister_type(LUSTRE_LWP_NAME);
1801 class_unregister_type(LUSTRE_OSP_NAME);
1802 lu_kmem_fini(osp_caches);
1805 MODULE_AUTHOR("Intel, Inc. <http://www.intel.com/>");
1806 MODULE_DESCRIPTION("Lustre OST Proxy Device ("LUSTRE_OSP_NAME")");
1807 MODULE_LICENSE("GPL");
1809 cfs_module(osp, LUSTRE_VERSION_STRING, osp_mod_init, osp_mod_exit);