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 * lustre/osp/osp_object.c
31 * Lustre OST Proxy Device (OSP) is the agent on the local MDT for the OST
34 * OSP object attributes cache
35 * ---------------------------
36 * OSP object is the stub of the remote OST-object or MDT-object. Both the
37 * attribute and the extended attributes are stored on the peer side remotely.
38 * It is inefficient to send RPC to peer to fetch those attributes when every
39 * get_attr()/get_xattr() called. For a large system, the LFSCK synchronous
40 * mode scanning is prohibitively inefficient.
42 * So the OSP maintains the OSP object attributes cache to cache some
43 * attributes on the local MDT. The cache is organized against the OSP
46 * struct osp_xattr_entry {
47 * struct list_head oxe_list;
53 * unsigned int oxe_exist:1,
60 * struct lu_attr opo_attr;
61 * struct list_head opo_xattr_list;
62 * spinlock_t opo_lock;
66 * The basic attributes, such as owner/mode/flags, are stored in the
67 * osp_object::opo_attr. The extended attributes will be stored
68 * as osp_xattr_entry. Every extended attribute has an independent
69 * osp_xattr_entry, and all the osp_xattr_entry are linked into the
70 * osp_object::opo_xattr_list. The OSP object attributes cache
71 * is protected by the osp_object::opo_lock.
73 * Not all OSP objects have an attributes cache because maintaining
74 * the cache requires some resources. Currently, the OSP object
75 * attributes cache will be initialized when the attributes or the
76 * extended attributes are pre-fetched via osp_declare_attr_get()
77 * or osp_declare_xattr_get(). That is usually for LFSCK purpose,
78 * but it also can be shared by others.
81 * XXX: NOT prepare out RPC for remote transaction. ((please refer to the
82 * comment of osp_trans_create() for remote transaction)
84 * According to our current transaction/dt_object_lock framework (to make
85 * the cross-MDTs modification for DNE1 to be workable), the transaction
86 * sponsor will start the transaction firstly, then try to acquire related
87 * dt_object_lock if needed. Under such rules, if we want to prepare the
88 * OUT RPC in the transaction declare phase, then related attr/xattr
89 * should be known without dt_object_lock. But such condition maybe not
90 * true for some remote transaction case. For example:
92 * For linkEA repairing (by LFSCK) case, before the LFSCK thread obtained
93 * the dt_object_lock on the target MDT-object, it cannot know whether
94 * the MDT-object has linkEA or not, neither invalid or not.
96 * Since the LFSCK thread cannot hold dt_object_lock before the remote
97 * transaction start (otherwise there will be some potential deadlock),
98 * it cannot prepare related OUT RPC for repairing during the declare
99 * phase as other normal transactions do.
101 * To resolve the trouble, we will make OSP to prepare related OUT RPC
102 * after remote transaction started, and trigger the remote updating
103 * (send RPC) when trans_stop. Then the up layer users, such as LFSCK,
104 * can follow the general rule to handle trans_start/dt_object_lock
105 * for repairing linkEA inconsistency without distinguishing remote
108 * In fact, above solution for remote transaction should be the normal
109 * model without considering DNE1. The trouble brought by DNE1 will be
110 * resolved in DNE2. At that time, this patch can be removed.
113 * Author: Alex Zhuravlev <alexey.zhuravlev@intel.com>
114 * Author: Mikhail Pershin <mike.tappro@intel.com>
117 #define DEBUG_SUBSYSTEM S_MDS
119 #include <lustre_obdo.h>
120 #include <lustre_swab.h>
122 #include "osp_internal.h"
124 static inline __u32 osp_dev2node(struct osp_device *osp)
126 return osp->opd_storage->dd_lu_dev.ld_site->ld_seq_site->ss_node_id;
129 static inline const char *osp_dto2name(struct osp_object *obj)
131 return obj->opo_obj.do_lu.lo_dev->ld_obd->obd_name;
134 static inline bool is_ost_obj(struct lu_object *lo)
136 return !lu2osp_dev(lo->lo_dev)->opd_connect_mdt;
139 static inline void __osp_oac_xattr_assignment(struct osp_object *obj,
140 struct osp_xattr_entry *oxe,
141 const struct lu_buf *buf)
144 memcpy(oxe->oxe_value, buf->lb_buf, buf->lb_len);
146 oxe->oxe_vallen = buf->lb_len;
152 * Assign FID to the OST object.
154 * This function will assign the FID to the OST object of a striped file.
156 * \param[in] env pointer to the thread context
157 * \param[in] d pointer to the OSP device
158 * \param[in] o pointer to the OSP object that the FID will be
161 static void osp_object_assign_fid(const struct lu_env *env,
162 struct osp_device *d, struct osp_object *o)
164 struct osp_thread_info *osi = osp_env_info(env);
166 LASSERT(fid_is_zero(lu_object_fid(&o->opo_obj.do_lu)));
167 LASSERT(o->opo_reserved);
170 osp_precreate_get_fid(env, d, &osi->osi_fid);
172 lu_object_assign_fid(env, &o->opo_obj.do_lu, &osi->osi_fid);
175 #define OXE_DEFAULT_LEN 16
178 * Release reference from the OSP object extended attribute entry.
180 * If it is the last reference, then free the entry.
182 * \param[in] oxe pointer to the OSP object extended attribute entry.
184 static inline void osp_oac_xattr_put(struct osp_xattr_entry *oxe)
186 if (atomic_dec_and_test(&oxe->oxe_ref)) {
187 LASSERT(list_empty(&oxe->oxe_list));
189 OBD_FREE(oxe, oxe->oxe_buflen);
194 * Find the named extended attribute in the OSP object attributes cache.
196 * The caller should take the osp_object::opo_lock before calling
199 * \param[in] obj pointer to the OSP object
200 * \param[in] name the name of the extended attribute
201 * \param[in] namelen the name length of the extended attribute
203 * \retval pointer to the found extended attribute entry
204 * \retval NULL if the specified extended attribute is not
207 static struct osp_xattr_entry *
208 osp_oac_xattr_find_locked(struct osp_object *obj, const char *name,
211 struct osp_xattr_entry *oxe;
213 list_for_each_entry(oxe, &obj->opo_xattr_list, oxe_list) {
214 if (namelen == oxe->oxe_namelen &&
215 strncmp(name, oxe->oxe_buf, namelen) == 0)
223 * Find the named extended attribute in the OSP object attributes cache.
225 * Call osp_oac_xattr_find_locked() with the osp_object::opo_lock held.
227 * \param[in] obj pointer to the OSP object
228 * \param[in] name the name of the extended attribute
229 * \param[in] unlink true if the extended attribute entry is to be removed
232 * \retval pointer to the found extended attribute entry
233 * \retval NULL if the specified extended attribute is not
236 static struct osp_xattr_entry *osp_oac_xattr_find(struct osp_object *obj,
237 const char *name, bool unlink)
239 struct osp_xattr_entry *oxe = NULL;
241 spin_lock(&obj->opo_lock);
242 oxe = osp_oac_xattr_find_locked(obj, name, strlen(name));
245 list_del_init(&oxe->oxe_list);
247 atomic_inc(&oxe->oxe_ref);
249 spin_unlock(&obj->opo_lock);
255 * Find the named extended attribute in the OSP object attributes cache.
257 * If it is not in the cache, then add an empty entry (that will be
258 * filled later) to cache with the given name.
260 * \param[in] obj pointer to the OSP object
261 * \param[in] name the name of the extended attribute
262 * \param[in] len the length of the extended attribute value
264 * \retval pointer to the found or new-created extended
266 * \retval NULL if the specified extended attribute is not in the
267 * cache or fail to add new empty entry to the cache.
269 static struct osp_xattr_entry *
270 osp_oac_xattr_find_or_add(struct osp_object *obj, const char *name, size_t len)
272 struct osp_xattr_entry *oxe;
273 struct osp_xattr_entry *tmp = NULL;
274 size_t namelen = strlen(name);
275 size_t size = sizeof(*oxe) + namelen + 1 +
276 (len ? len : OXE_DEFAULT_LEN);
278 oxe = osp_oac_xattr_find(obj, name, false);
282 OBD_ALLOC(oxe, size);
286 INIT_LIST_HEAD(&oxe->oxe_list);
287 oxe->oxe_buflen = size;
288 oxe->oxe_namelen = namelen;
289 memcpy(oxe->oxe_buf, name, namelen);
290 oxe->oxe_value = oxe->oxe_buf + namelen + 1;
291 /* One ref is for the caller, the other is for the entry on the list. */
292 atomic_set(&oxe->oxe_ref, 2);
294 spin_lock(&obj->opo_lock);
295 tmp = osp_oac_xattr_find_locked(obj, name, namelen);
297 list_add_tail(&oxe->oxe_list, &obj->opo_xattr_list);
299 atomic_inc(&tmp->oxe_ref);
300 spin_unlock(&obj->opo_lock);
311 * Assign the cached OST-object's EA with the given value.
313 * If the current EA entry in cache has not enough space to hold the new
314 * value, remove it, create a new one, then assign with the given value.
316 * \param[in] obj pointer to the OSP object
317 * \param[in] oxe pointer to the cached EA entry to be assigned
318 * \param[in] buf pointer to the buffer with new EA value
320 * \retval pointer to the new created EA entry in cache if
321 * current entry is not big enough; otherwise, the
322 * input 'oxe' will be returned.
324 static struct osp_xattr_entry *
325 osp_oac_xattr_assignment(struct osp_object *obj, struct osp_xattr_entry *oxe,
326 const struct lu_buf *buf)
328 struct osp_xattr_entry *new = NULL;
329 struct osp_xattr_entry *old = NULL;
330 int namelen = oxe->oxe_namelen;
331 size_t size = sizeof(*oxe) + namelen + 1 + buf->lb_len;
332 bool unlink_only = false;
334 if (oxe->oxe_buflen < size) {
335 OBD_ALLOC(new, size);
337 INIT_LIST_HEAD(&new->oxe_list);
338 new->oxe_buflen = size;
339 new->oxe_namelen = namelen;
340 memcpy(new->oxe_buf, oxe->oxe_buf, namelen);
341 new->oxe_value = new->oxe_buf + namelen + 1;
342 /* One ref is for the caller,
343 * the other is for the entry on the list. */
344 atomic_set(&new->oxe_ref, 2);
345 __osp_oac_xattr_assignment(obj, new, buf);
348 CWARN("%s: cannot update cached xattr %.*s of "DFID"\n",
349 osp_dto2name(obj), namelen, oxe->oxe_buf,
350 PFID(lu_object_fid(&obj->opo_obj.do_lu)));
354 spin_lock(&obj->opo_lock);
355 old = osp_oac_xattr_find_locked(obj, oxe->oxe_buf, namelen);
358 /* Unlink the 'old'. */
359 list_del_init(&old->oxe_list);
361 /* Drop the ref for 'old' on list. */
362 osp_oac_xattr_put(old);
364 /* Drop the ref for current using. */
365 osp_oac_xattr_put(oxe);
368 /* Insert 'new' into list. */
369 list_add_tail(&new->oxe_list, &obj->opo_xattr_list);
370 } else if (unlink_only) {
371 /* Unlink the 'old'. */
372 list_del_init(&old->oxe_list);
374 /* Drop the ref for 'old' on list. */
375 osp_oac_xattr_put(old);
377 __osp_oac_xattr_assignment(obj, oxe, buf);
380 /* Drop the ref for current using. */
381 osp_oac_xattr_put(oxe);
384 /* Someone unlinked the 'old' by race,
385 * insert the 'new' one into list. */
386 list_add_tail(&new->oxe_list, &obj->opo_xattr_list);
388 spin_unlock(&obj->opo_lock);
394 * Parse the OSP object attribute from the RPC reply.
396 * If the attribute is valid, then it will be added to the OSP object
399 * \param[in] env pointer to the thread context
400 * \param[in] reply pointer to the RPC reply
401 * \param[in] req pointer to the RPC request
402 * \param[out] attr pointer to buffer to hold the output attribute
403 * \param[in] obj pointer to the OSP object
404 * \param[in] index the index of the attribute buffer in the reply
406 * \retval 0 for success
407 * \retval negative error number on failure
409 static int osp_get_attr_from_reply(const struct lu_env *env,
410 struct object_update_reply *reply,
411 struct ptlrpc_request *req,
412 struct lu_attr *attr,
413 struct osp_object *obj, int index)
415 struct osp_thread_info *osi = osp_env_info(env);
416 struct lu_buf *rbuf = &osi->osi_lb2;
417 struct obdo *lobdo = &osi->osi_obdo;
421 rc = object_update_result_data_get(reply, rbuf, index);
425 wobdo = rbuf->lb_buf;
426 if (rbuf->lb_len != sizeof(*wobdo))
429 LASSERT(req != NULL);
430 if (ptlrpc_req_need_swab(req))
431 lustre_swab_obdo(wobdo);
433 lustre_get_wire_obdo(NULL, lobdo, wobdo);
434 spin_lock(&obj->opo_lock);
435 la_from_obdo(&obj->opo_attr, lobdo, lobdo->o_valid);
437 *attr = obj->opo_attr;
438 spin_unlock(&obj->opo_lock);
444 * Interpreter function for getting OSP object attribute asynchronously.
446 * Called to interpret the result of an async mode RPC for getting the
447 * OSP object attribute.
449 * \param[in] env pointer to the thread context
450 * \param[in] reply pointer to the RPC reply
451 * \param[in] req pointer to the RPC request
452 * \param[in] obj pointer to the OSP object
453 * \param[out] data pointer to buffer to hold the output attribute
454 * \param[in] index the index of the attribute buffer in the reply
455 * \param[in] rc the result for handling the RPC
457 * \retval 0 for success
458 * \retval negative error number on failure
460 static int osp_attr_get_interpterer(const struct lu_env *env,
461 struct object_update_reply *reply,
462 struct ptlrpc_request *req,
463 struct osp_object *obj,
464 void *data, int index, int rc)
466 struct lu_attr *attr = data;
469 osp2lu_obj(obj)->lo_header->loh_attr |= LOHA_EXISTS;
470 obj->opo_non_exist = 0;
472 return osp_get_attr_from_reply(env, reply, req, NULL, obj,
476 osp2lu_obj(obj)->lo_header->loh_attr &= ~LOHA_EXISTS;
477 obj->opo_non_exist = 1;
480 spin_lock(&obj->opo_lock);
482 spin_unlock(&obj->opo_lock);
489 * Implement OSP layer dt_object_operations::do_declare_attr_get() interface.
491 * Declare that the caller will get attribute from the specified OST object.
493 * This function adds an Object Unified Target (OUT) sub-request to the per-OSP
494 * based shared asynchronous request queue. The osp_attr_get_interpterer()
495 * is registered as the interpreter function to handle the result of this
498 * \param[in] env pointer to the thread context
499 * \param[in] dt pointer to the OSP layer dt_object
501 * \retval 0 for success
502 * \retval negative error number on failure
504 static int osp_declare_attr_get(const struct lu_env *env, struct dt_object *dt)
506 struct osp_object *obj = dt2osp_obj(dt);
507 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
510 mutex_lock(&osp->opd_async_requests_mutex);
511 rc = osp_insert_async_request(env, OUT_ATTR_GET, obj, 0, NULL, NULL,
512 &obj->opo_attr, sizeof(struct obdo),
513 osp_attr_get_interpterer);
514 mutex_unlock(&osp->opd_async_requests_mutex);
520 * Implement OSP layer dt_object_operations::do_attr_get() interface.
522 * Get attribute from the specified MDT/OST object.
524 * If the attribute is in the OSP object attributes cache, then return
525 * the cached attribute directly. Otherwise it will trigger an OUT RPC
526 * to the peer to get the attribute synchronously, if successful, add it
527 * to the OSP attributes cache. (\see lustre/osp/osp_trans.c for OUT RPC.)
529 * \param[in] env pointer to the thread context
530 * \param[in] dt pointer to the OSP layer dt_object
531 * \param[out] attr pointer to the buffer to hold the output attribute
533 * \retval 0 for success
534 * \retval negative error number on failure
536 int osp_attr_get(const struct lu_env *env, struct dt_object *dt,
537 struct lu_attr *attr)
539 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
540 struct osp_object *obj = dt2osp_obj(dt);
541 struct dt_device *dev = &osp->opd_dt_dev;
542 struct osp_update_request *update;
543 struct object_update_reply *reply;
544 struct ptlrpc_request *req = NULL;
548 if (is_ost_obj(&dt->do_lu) && obj->opo_non_exist)
551 spin_lock(&obj->opo_lock);
552 if (obj->opo_attr.la_valid != 0 && !obj->opo_stale) {
553 *attr = obj->opo_attr;
554 spin_unlock(&obj->opo_lock);
558 spin_unlock(&obj->opo_lock);
560 update = osp_update_request_create(dev);
562 RETURN(PTR_ERR(update));
564 rc = OSP_UPDATE_RPC_PACK(env, out_attr_get_pack, update,
565 lu_object_fid(&dt->do_lu));
567 CERROR("%s: Insert update error "DFID": rc = %d\n",
568 dev->dd_lu_dev.ld_obd->obd_name,
569 PFID(lu_object_fid(&dt->do_lu)), rc);
574 rc = osp_remote_sync(env, osp, update, &req);
577 osp2lu_obj(obj)->lo_header->loh_attr &= ~LOHA_EXISTS;
578 obj->opo_non_exist = 1;
580 CERROR("%s:osp_attr_get update error "DFID": rc = %d\n",
581 dev->dd_lu_dev.ld_obd->obd_name,
582 PFID(lu_object_fid(&dt->do_lu)), rc);
588 osp2lu_obj(obj)->lo_header->loh_attr |= LOHA_EXISTS;
589 obj->opo_non_exist = 0;
590 reply = req_capsule_server_sized_get(&req->rq_pill,
591 &RMF_OUT_UPDATE_REPLY,
592 OUT_UPDATE_REPLY_SIZE);
593 if (reply == NULL || reply->ourp_magic != UPDATE_REPLY_MAGIC)
594 GOTO(out, rc = -EPROTO);
596 rc = osp_get_attr_from_reply(env, reply, req, attr, obj, 0);
600 spin_lock(&obj->opo_lock);
602 spin_unlock(&obj->opo_lock);
608 ptlrpc_req_finished(req);
610 osp_update_request_destroy(env, update);
616 * Implement OSP layer dt_object_operations::do_declare_attr_set() interface.
618 * If the transaction is not remote one, then declare the credits that will
619 * be used for the subsequent llog record for the object's attributes.
621 * \param[in] env pointer to the thread context
622 * \param[in] dt pointer to the OSP layer dt_object
623 * \param[in] attr pointer to the attribute to be set
624 * \param[in] th pointer to the transaction handler
626 * \retval 0 for success
627 * \retval negative error number on failure
629 static int osp_declare_attr_set(const struct lu_env *env, struct dt_object *dt,
630 const struct lu_attr *attr, struct thandle *th)
632 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
633 struct osp_object *o = dt2osp_obj(dt);
636 if (is_only_remote_trans(th))
637 return osp_md_declare_attr_set(env, dt, attr, th);
639 * Usually we don't allow server stack to manipulate size
640 * but there is a special case when striping is created
641 * late, after stripeless file got truncated to non-zero.
643 * In this case we do the following:
645 * 1) grab id in declare - this can lead to leaked OST objects
646 * but we don't currently have proper mechanism and the only
647 * options we have are to do truncate RPC holding transaction
648 * open (very bad) or to grab id in declare at cost of leaked
649 * OST object in same very rare unfortunate case (just bad)
650 * notice 1.6-2.0 do assignment outside of running transaction
651 * all the time, meaning many more chances for leaked objects.
653 * 2) send synchronous truncate RPC with just assigned id
656 /* there are few places in MDD code still passing NULL
657 * XXX: to be fixed soon */
661 if (attr->la_valid & LA_SIZE && attr->la_size > 0 &&
662 fid_is_zero(lu_object_fid(&o->opo_obj.do_lu))) {
663 LASSERT(!dt_object_exists(dt));
664 osp_object_assign_fid(env, d, o);
665 rc = osp_object_truncate(env, dt, attr->la_size);
670 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
673 /* track all UID/GID, projid, and layout version changes via llog */
674 rc = osp_sync_declare_add(env, o, MDS_SETATTR64_REC, th);
680 * Implement OSP layer dt_object_operations::do_attr_set() interface.
682 * Set attribute to the specified OST object.
684 * If the transaction is a remote one, then add OUT_ATTR_SET sub-request
685 * in the OUT RPC that will be flushed when the remote transaction stop.
686 * Otherwise, it will generate a MDS_SETATTR64_REC record in the llog that
687 * will be handled by a dedicated thread asynchronously.
689 * If the attribute entry exists in the OSP object attributes cache,
690 * then update the cached attribute according to given attribute.
692 * \param[in] env pointer to the thread context
693 * \param[in] dt pointer to the OSP layer dt_object
694 * \param[in] attr pointer to the attribute to be set
695 * \param[in] th pointer to the transaction handler
697 * \retval 0 for success
698 * \retval negative error number on failure
700 static int osp_attr_set(const struct lu_env *env, struct dt_object *dt,
701 const struct lu_attr *attr, struct thandle *th)
703 struct osp_object *o = dt2osp_obj(dt);
707 /* we're interested in uid/gid/projid/layout version changes only */
708 if (!(attr->la_valid & LA_REMOTE_ATTR_SET))
711 if (!is_only_remote_trans(th)) {
712 if (attr->la_flags & LUSTRE_SET_SYNC_FL) {
713 struct ptlrpc_request *req = NULL;
714 struct osp_update_request *update = NULL;
715 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
717 update = osp_update_request_create(&osp->opd_dt_dev);
719 RETURN(PTR_ERR(update));
721 rc = OSP_UPDATE_RPC_PACK(env, out_attr_set_pack, update,
722 lu_object_fid(&dt->do_lu),
725 CERROR("%s: update error "DFID": rc = %d\n",
726 osp->opd_obd->obd_name,
727 PFID(lu_object_fid(&dt->do_lu)), rc);
729 osp_update_request_destroy(env, update);
733 rc = osp_remote_sync(env, osp, update, &req);
735 ptlrpc_req_finished(req);
737 osp_update_request_destroy(env, update);
739 rc = osp_sync_add(env, o, MDS_SETATTR64_REC, th, attr);
740 /* XXX: send new uid/gid to OST ASAP? */
745 /* It is for OST-object attr_set directly without updating
746 * local MDT-object attribute. It is usually used by LFSCK. */
747 rc = osp_md_attr_set(env, dt, attr, th);
748 CDEBUG(D_INFO, "(1) set attr "DFID": rc = %d\n",
749 PFID(&dt->do_lu.lo_header->loh_fid), rc);
754 /* Update the OSP object attributes cache. */
756 spin_lock(&o->opo_lock);
757 if (attr->la_valid & LA_UID) {
758 la->la_uid = attr->la_uid;
759 la->la_valid |= LA_UID;
762 if (attr->la_valid & LA_GID) {
763 la->la_gid = attr->la_gid;
764 la->la_valid |= LA_GID;
766 if (attr->la_valid & LA_PROJID) {
767 la->la_projid = attr->la_projid;
768 la->la_valid |= LA_PROJID;
770 spin_unlock(&o->opo_lock);
777 * Interpreter function for getting OSP object extended attribute asynchronously
779 * Called to interpret the result of an async mode RPC for getting the
780 * OSP object extended attribute.
782 * \param[in] env pointer to the thread context
783 * \param[in] reply pointer to the RPC reply
784 * \param[in] req pointer to the RPC request
785 * \param[in] obj pointer to the OSP object
786 * \param[out] data pointer to OSP object attributes cache
787 * \param[in] index the index of the attribute buffer in the reply
788 * \param[in] rc the result for handling the RPC
790 * \retval 0 for success
791 * \retval negative error number on failure
793 static int osp_xattr_get_interpterer(const struct lu_env *env,
794 struct object_update_reply *reply,
795 struct ptlrpc_request *req,
796 struct osp_object *obj,
797 void *data, int index, int rc)
799 struct osp_xattr_entry *oxe = data;
801 spin_lock(&obj->opo_lock);
803 struct lu_buf *rbuf = &osp_env_info(env)->osi_lb2;
804 size_t len = sizeof(*oxe) + oxe->oxe_namelen + 1;
806 rc = object_update_result_data_get(reply, rbuf, index);
807 if (rc == -ENOENT || rc == -ENODATA || rc == 0) {
813 if (unlikely(rc < 0) ||
814 rbuf->lb_len > (oxe->oxe_buflen - len)) {
819 __osp_oac_xattr_assignment(obj, oxe, rbuf);
820 } else if (rc == -ENOENT || rc == -ENODATA) {
828 spin_unlock(&obj->opo_lock);
830 /* Put the reference obtained in the osp_declare_xattr_get(). */
831 osp_oac_xattr_put(oxe);
837 * Implement OSP dt_object_operations::do_declare_xattr_get() interface.
839 * Declare that the caller will get extended attribute from the specified
842 * This function will add an OUT_XATTR_GET sub-request to the per OSP
843 * based shared asynchronous request queue with the interpreter function:
844 * osp_xattr_get_interpterer().
846 * \param[in] env pointer to the thread context
847 * \param[in] dt pointer to the OSP layer dt_object
848 * \param[out] buf pointer to the lu_buf to hold the extended attribute
849 * \param[in] name the name for the expected extended attribute
851 * \retval 0 for success
852 * \retval negative error number on failure
854 static int osp_declare_xattr_get(const struct lu_env *env, struct dt_object *dt,
855 struct lu_buf *buf, const char *name)
857 struct osp_object *obj = dt2osp_obj(dt);
858 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
859 struct osp_xattr_entry *oxe;
863 LASSERT(buf != NULL);
864 LASSERT(name != NULL);
866 if (unlikely(buf->lb_len == 0))
869 oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
873 len = strlen(name) + 1;
874 mutex_lock(&osp->opd_async_requests_mutex);
875 rc = osp_insert_async_request(env, OUT_XATTR_GET, obj, 1,
876 &len, (const void **)&name,
878 osp_xattr_get_interpterer);
880 mutex_unlock(&osp->opd_async_requests_mutex);
881 osp_oac_xattr_put(oxe);
883 struct osp_update_request *our;
884 struct osp_update_request_sub *ours;
886 /* XXX: Currently, we trigger the batched async OUT
887 * RPC via dt_declare_xattr_get(). It is not
888 * perfect solution, but works well now.
890 * We will improve it in the future. */
891 our = osp->opd_async_requests;
892 ours = osp_current_object_update_request(our);
893 if (ours != NULL && ours->ours_req != NULL &&
894 ours->ours_req->ourq_count > 0) {
895 osp->opd_async_requests = NULL;
896 mutex_unlock(&osp->opd_async_requests_mutex);
897 rc = osp_unplug_async_request(env, osp, our);
899 mutex_unlock(&osp->opd_async_requests_mutex);
907 * Implement OSP layer dt_object_operations::do_xattr_get() interface.
909 * Get extended attribute from the specified MDT/OST object.
911 * If the extended attribute is in the OSP object attributes cache, then
912 * return the cached extended attribute directly. Otherwise it will get
913 * the extended attribute synchronously, if successful, add it to the OSP
914 * attributes cache. (\see lustre/osp/osp_trans.c for OUT RPC.)
916 * There is a race condition: some other thread has added the named extended
917 * attributed entry to the OSP object attributes cache during the current
918 * OUT_XATTR_GET handling. If such case happens, the OSP will replace the
919 * (just) existing extended attribute entry with the new replied one.
921 * \param[in] env pointer to the thread context
922 * \param[in] dt pointer to the OSP layer dt_object
923 * \param[out] buf pointer to the lu_buf to hold the extended attribute
924 * \param[in] name the name for the expected extended attribute
926 * \retval 0 for success
927 * \retval negative error number on failure
929 int osp_xattr_get(const struct lu_env *env, struct dt_object *dt,
930 struct lu_buf *buf, const char *name)
932 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
933 struct osp_object *obj = dt2osp_obj(dt);
934 struct dt_device *dev = &osp->opd_dt_dev;
935 struct lu_buf *rbuf = &osp_env_info(env)->osi_lb2;
936 struct osp_update_request *update = NULL;
937 struct ptlrpc_request *req = NULL;
938 struct object_update_reply *reply;
939 struct osp_xattr_entry *oxe = NULL;
940 const char *dname = osp_dto2name(obj);
944 LASSERT(buf != NULL);
945 LASSERT(name != NULL);
947 if (OBD_FAIL_CHECK(OBD_FAIL_LFSCK_BAD_NETWORK) &&
948 osp->opd_index == cfs_fail_val) {
949 if (is_ost_obj(&dt->do_lu)) {
950 if (osp_dev2node(osp) == cfs_fail_val)
953 if (strcmp(name, XATTR_NAME_LINK) == 0)
958 if (unlikely(obj->opo_non_exist))
961 oxe = osp_oac_xattr_find(obj, name, false);
963 spin_lock(&obj->opo_lock);
964 if (oxe->oxe_ready) {
966 GOTO(unlock, rc = -ENODATA);
968 if (buf->lb_buf == NULL)
969 GOTO(unlock, rc = oxe->oxe_vallen);
971 if (buf->lb_len < oxe->oxe_vallen)
972 GOTO(unlock, rc = -ERANGE);
974 memcpy(buf->lb_buf, oxe->oxe_value,
977 GOTO(unlock, rc = oxe->oxe_vallen);
980 spin_unlock(&obj->opo_lock);
981 osp_oac_xattr_put(oxe);
985 spin_unlock(&obj->opo_lock);
987 update = osp_update_request_create(dev);
989 GOTO(out, rc = PTR_ERR(update));
991 rc = OSP_UPDATE_RPC_PACK(env, out_xattr_get_pack, update,
992 lu_object_fid(&dt->do_lu), name, buf->lb_len);
994 CERROR("%s: Insert update error "DFID": rc = %d\n",
995 dname, PFID(lu_object_fid(&dt->do_lu)), rc);
999 rc = osp_remote_sync(env, osp, update, &req);
1001 if (rc == -ENOENT) {
1002 dt->do_lu.lo_header->loh_attr &= ~LOHA_EXISTS;
1003 obj->opo_non_exist = 1;
1007 oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
1010 CWARN("%s: Fail to add xattr (%s) to cache for "
1011 DFID" (1): rc = %d\n", dname, name,
1012 PFID(lu_object_fid(&dt->do_lu)), rc);
1017 spin_lock(&obj->opo_lock);
1018 if (rc == -ENOENT || rc == -ENODATA) {
1024 spin_unlock(&obj->opo_lock);
1029 reply = req_capsule_server_sized_get(&req->rq_pill,
1030 &RMF_OUT_UPDATE_REPLY,
1031 OUT_UPDATE_REPLY_SIZE);
1032 if (reply->ourp_magic != UPDATE_REPLY_MAGIC) {
1033 CERROR("%s: Wrong version %x expected %x "DFID": rc = %d\n",
1034 dname, reply->ourp_magic, UPDATE_REPLY_MAGIC,
1035 PFID(lu_object_fid(&dt->do_lu)), -EPROTO);
1037 GOTO(out, rc = -EPROTO);
1040 rc = object_update_result_data_get(reply, rbuf, 0);
1041 if (rc < 0 || rbuf->lb_len == 0) {
1042 if (oxe == NULL && rc == -ENODATA) {
1043 oxe = osp_oac_xattr_find_or_add(obj, name, buf->lb_len);
1046 CWARN("%s: Fail to add xattr (%s) to cache for "
1047 DFID" (1): rc = %d\n", dname, name,
1048 PFID(lu_object_fid(&dt->do_lu)), rc);
1054 spin_lock(&obj->opo_lock);
1055 if (unlikely(rc == -ENODATA)) {
1061 spin_unlock(&obj->opo_lock);
1067 /* For detecting EA size. */
1072 oxe = osp_oac_xattr_find_or_add(obj, name, rbuf->lb_len);
1074 CWARN("%s: Fail to add xattr (%s) to "
1075 "cache for "DFID" (2): rc = %d\n",
1076 dname, name, PFID(lu_object_fid(&dt->do_lu)), rc);
1082 oxe = osp_oac_xattr_assignment(obj, oxe, rbuf);
1087 if (rc > 0 && buf->lb_buf) {
1088 if (unlikely(buf->lb_len < rbuf->lb_len))
1091 memcpy(buf->lb_buf, rbuf->lb_buf, rbuf->lb_len);
1095 ptlrpc_req_finished(req);
1097 if (update && !IS_ERR(update))
1098 osp_update_request_destroy(env, update);
1101 osp_oac_xattr_put(oxe);
1107 * Implement OSP layer dt_object_operations::do_declare_xattr_set() interface.
1109 * Declare that the caller will set extended attribute to the specified
1112 * If it is non-remote transaction, it will add an OUT_XATTR_SET sub-request
1113 * to the OUT RPC that will be flushed when the transaction start. And if the
1114 * OSP attributes cache is initialized, then check whether the name extended
1115 * attribute entry exists in the cache or not. If yes, replace it; otherwise,
1116 * add the extended attribute to the cache.
1118 * \param[in] env pointer to the thread context
1119 * \param[in] dt pointer to the OSP layer dt_object
1120 * \param[in] buf pointer to the lu_buf to hold the extended attribute
1121 * \param[in] name the name of the extended attribute to be set
1122 * \param[in] flag to indicate the detailed set operation: LU_XATTR_CREATE
1123 * or LU_XATTR_REPLACE or others
1124 * \param[in] th pointer to the transaction handler
1126 * \retval 0 for success
1127 * \retval negative error number on failure
1129 int osp_declare_xattr_set(const struct lu_env *env, struct dt_object *dt,
1130 const struct lu_buf *buf, const char *name,
1131 int flag, struct thandle *th)
1133 return osp_trans_update_request_create(th);
1137 * Implement OSP layer dt_object_operations::do_xattr_set() interface.
1139 * Set extended attribute to the specified MDT/OST object.
1141 * Add an OUT_XATTR_SET sub-request into the OUT RPC that will be flushed in
1142 * the transaction stop. And if the OSP attributes cache is initialized, then
1143 * check whether the name extended attribute entry exists in the cache or not.
1144 * If yes, replace it; otherwise, add the extended attribute to the cache.
1146 * \param[in] env pointer to the thread context
1147 * \param[in] dt pointer to the OSP layer dt_object
1148 * \param[in] buf pointer to the lu_buf to hold the extended attribute
1149 * \param[in] name the name of the extended attribute to be set
1150 * \param[in] fl to indicate the detailed set operation: LU_XATTR_CREATE
1151 * or LU_XATTR_REPLACE or others
1152 * \param[in] th pointer to the transaction handler
1154 * \retval 0 for success
1155 * \retval negative error number on failure
1157 int osp_xattr_set(const struct lu_env *env, struct dt_object *dt,
1158 const struct lu_buf *buf, const char *name, int fl,
1161 struct osp_object *o = dt2osp_obj(dt);
1162 struct osp_update_request *update;
1163 struct osp_xattr_entry *oxe;
1167 update = thandle_to_osp_update_request(th);
1168 LASSERT(update != NULL);
1170 CDEBUG(D_INODE, DFID" set xattr '%s' with size %zd\n",
1171 PFID(lu_object_fid(&dt->do_lu)), name, buf->lb_len);
1173 rc = OSP_UPDATE_RPC_PACK(env, out_xattr_set_pack, update,
1174 lu_object_fid(&dt->do_lu), buf, name, fl);
1178 /* Do not cache linkEA that may be self-adjusted by peers
1179 * under EA overflow case. */
1180 if (strcmp(name, XATTR_NAME_LINK) == 0) {
1181 oxe = osp_oac_xattr_find(o, name, true);
1183 osp_oac_xattr_put(oxe);
1188 oxe = osp_oac_xattr_find_or_add(o, name, buf->lb_len);
1190 CWARN("%s: cannot cache xattr '%s' of "DFID"\n",
1191 osp_dto2name(o), name, PFID(lu_object_fid(&dt->do_lu)));
1196 oxe = osp_oac_xattr_assignment(o, oxe, buf);
1198 osp_oac_xattr_put(oxe);
1204 * Implement OSP layer dt_object_operations::do_declare_xattr_del() interface.
1206 * Declare that the caller will delete extended attribute on the specified
1209 * If it is non-remote transaction, it will add an OUT_XATTR_DEL sub-request
1210 * to the OUT RPC that will be flushed when the transaction start. And if the
1211 * name extended attribute entry exists in the OSP attributes cache, then remove
1212 * it from the cache.
1214 * \param[in] env pointer to the thread context
1215 * \param[in] dt pointer to the OSP layer dt_object
1216 * \param[in] name the name of the extended attribute to be set
1217 * \param[in] th pointer to the transaction handler
1219 * \retval 0 for success
1220 * \retval negative error number on failure
1222 int osp_declare_xattr_del(const struct lu_env *env, struct dt_object *dt,
1223 const char *name, struct thandle *th)
1225 return osp_trans_update_request_create(th);
1229 * Implement OSP layer dt_object_operations::do_xattr_del() interface.
1231 * Delete extended attribute on the specified MDT/OST object.
1233 * If it is remote transaction, it will add an OUT_XATTR_DEL sub-request into
1234 * the OUT RPC that will be flushed when the transaction stop. And if the name
1235 * extended attribute entry exists in the OSP attributes cache, then remove it
1238 * \param[in] env pointer to the thread context
1239 * \param[in] dt pointer to the OSP layer dt_object
1240 * \param[in] name the name of the extended attribute to be set
1241 * \param[in] th pointer to the transaction handler
1243 * \retval 0 for success
1244 * \retval negative error number on failure
1246 int osp_xattr_del(const struct lu_env *env, struct dt_object *dt,
1247 const char *name, struct thandle *th)
1249 struct osp_update_request *update;
1250 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1251 struct osp_object *o = dt2osp_obj(dt);
1252 struct osp_xattr_entry *oxe;
1255 update = thandle_to_osp_update_request(th);
1256 LASSERT(update != NULL);
1258 rc = OSP_UPDATE_RPC_PACK(env, out_xattr_del_pack, update, fid, name);
1262 oxe = osp_oac_xattr_find(o, name, true);
1264 /* Drop the ref for entry on list. */
1265 osp_oac_xattr_put(oxe);
1270 void osp_obj_invalidate_cache(struct osp_object *obj)
1272 struct osp_xattr_entry *oxe;
1273 struct osp_xattr_entry *tmp;
1275 spin_lock(&obj->opo_lock);
1276 list_for_each_entry_safe(oxe, tmp, &obj->opo_xattr_list, oxe_list) {
1278 list_del_init(&oxe->oxe_list);
1279 osp_oac_xattr_put(oxe);
1281 obj->opo_attr.la_valid = 0;
1282 spin_unlock(&obj->opo_lock);
1286 * Implement OSP layer dt_object_operations::do_invalidate() interface.
1288 * Invalidate attributes cached on the specified MDT/OST object.
1290 * \param[in] env pointer to the thread context
1291 * \param[in] dt pointer to the OSP layer dt_object
1293 * \retval 0 for success
1294 * \retval negative error number on failure
1296 int osp_invalidate(const struct lu_env *env, struct dt_object *dt)
1298 struct osp_object *obj = dt2osp_obj(dt);
1301 CDEBUG(D_HA, "Invalidate osp_object "DFID"\n",
1302 PFID(lu_object_fid(&dt->do_lu)));
1303 osp_obj_invalidate_cache(obj);
1305 spin_lock(&obj->opo_lock);
1307 spin_unlock(&obj->opo_lock);
1313 * Implement OSP layer dt_object_operations::do_declare_create() interface.
1315 * Declare that the caller will create the OST object.
1317 * If the transaction is a remote transaction and the FID for the OST-object
1318 * has been assigned already, then handle it as creating (remote) MDT object
1319 * via osp_md_declare_create(). This function is usually used for LFSCK
1320 * to re-create the lost OST object. Otherwise, if it is not replay case, the
1321 * OSP will reserve pre-created object for the subsequent create operation;
1322 * if the MDT side cached pre-created objects are less than some threshold,
1323 * then it will wakeup the pre-create thread.
1325 * \param[in] env pointer to the thread context
1326 * \param[in] dt pointer to the OSP layer dt_object
1327 * \param[in] attr the attribute for the object to be created
1328 * \param[in] hint pointer to the hint for creating the object, such as
1330 * \param[in] dof pointer to the dt_object_format for help the creation
1331 * \param[in] th pointer to the transaction handler
1333 * \retval 0 for success
1334 * \retval negative error number on failure
1336 static int osp_declare_create(const struct lu_env *env, struct dt_object *dt,
1337 struct lu_attr *attr,
1338 struct dt_allocation_hint *hint,
1339 struct dt_object_format *dof, struct thandle *th)
1341 struct osp_thread_info *osi = osp_env_info(env);
1342 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
1343 struct osp_object *o = dt2osp_obj(dt);
1344 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
1345 struct thandle *local_th;
1350 if (is_only_remote_trans(th) && !fid_is_zero(fid)) {
1351 LASSERT(fid_is_sane(fid));
1353 rc = osp_md_declare_create(env, dt, attr, hint, dof, th);
1358 /* should happen to non-0 OSP only so that at least one object
1359 * has been already declared in the scenario and LOD should
1361 if (OBD_FAIL_CHECK(OBD_FAIL_MDS_OSC_CREATE_FAIL) && d->opd_index == 1)
1364 LASSERT(d->opd_last_used_oid_file);
1367 * There can be gaps in precreated ids and record to unlink llog
1368 * XXX: we do not handle gaps yet, implemented before solution
1369 * was found to be racy, so we disabled that. there is no
1370 * point in making useless but expensive llog declaration.
1372 /* rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th); */
1374 local_th = osp_get_storage_thandle(env, th, d);
1375 if (IS_ERR(local_th))
1376 RETURN(PTR_ERR(local_th));
1378 if (unlikely(!fid_is_zero(fid))) {
1379 /* replay case: caller knows fid */
1380 osi->osi_off = sizeof(osi->osi_id) * d->opd_index;
1381 osi->osi_lb.lb_len = sizeof(osi->osi_id);
1382 osi->osi_lb.lb_buf = NULL;
1384 rc = dt_declare_record_write(env, d->opd_last_used_oid_file,
1385 &osi->osi_lb, osi->osi_off,
1391 * in declaration we need to reserve object so that we don't block
1392 * awaiting precreation RPC to complete
1394 rc = osp_precreate_reserve(env, d);
1396 * we also need to declare update to local "last used id" file for
1397 * recovery if object isn't used for a reason, we need to release
1398 * reservation, this can be made in osd_object_release()
1401 /* mark id is reserved: in create we don't want to talk
1403 LASSERT(o->opo_reserved == 0);
1404 o->opo_reserved = 1;
1406 /* common for all OSPs file hystorically */
1407 osi->osi_off = sizeof(osi->osi_id) * d->opd_index;
1408 osi->osi_lb.lb_len = sizeof(osi->osi_id);
1409 osi->osi_lb.lb_buf = NULL;
1410 rc = dt_declare_record_write(env, d->opd_last_used_oid_file,
1411 &osi->osi_lb, osi->osi_off,
1414 /* not needed in the cache anymore */
1415 set_bit(LU_OBJECT_HEARD_BANSHEE,
1416 &dt->do_lu.lo_header->loh_flags);
1422 * Implement OSP layer dt_object_operations::do_create() interface.
1424 * Create the OST object.
1426 * If the transaction is a remote transaction and the FID for the OST-object
1427 * has been assigned already, then handle it as handling MDT object via the
1428 * osp_md_create(). For other cases, the OSP will assign FID to the
1429 * object to be created, and update last_used Object ID (OID) file.
1431 * \param[in] env pointer to the thread context
1432 * \param[in] dt pointer to the OSP layer dt_object
1433 * \param[in] attr the attribute for the object to be created
1434 * \param[in] hint pointer to the hint for creating the object, such as
1436 * \param[in] dof pointer to the dt_object_format for help the creation
1437 * \param[in] th pointer to the transaction handler
1439 * \retval 0 for success
1440 * \retval negative error number on failure
1442 static int osp_create(const struct lu_env *env, struct dt_object *dt,
1443 struct lu_attr *attr, struct dt_allocation_hint *hint,
1444 struct dt_object_format *dof, struct thandle *th)
1446 struct osp_thread_info *osi = osp_env_info(env);
1447 struct osp_device *d = lu2osp_dev(dt->do_lu.lo_dev);
1448 struct osp_object *o = dt2osp_obj(dt);
1450 struct lu_fid *fid = &osi->osi_fid;
1451 struct thandle *local_th;
1452 struct lu_fid *last_fid = &d->opd_last_used_fid;
1455 if (is_only_remote_trans(th) &&
1456 !fid_is_zero(lu_object_fid(&dt->do_lu))) {
1457 LASSERT(fid_is_sane(lu_object_fid(&dt->do_lu)));
1459 rc = osp_md_create(env, dt, attr, hint, dof, th);
1461 o->opo_non_exist = 0;
1466 o->opo_non_exist = 0;
1467 if (o->opo_reserved) {
1468 /* regular case, fid is assigned holding transaction open */
1469 osp_object_assign_fid(env, d, o);
1472 memcpy(fid, lu_object_fid(&dt->do_lu), sizeof(*fid));
1474 LASSERTF(fid_is_sane(fid), "fid for osp_object %p is insane"DFID"!\n",
1477 if (!o->opo_reserved) {
1478 /* special case, id was assigned outside of transaction
1479 * see comments in osp_declare_attr_set */
1480 LASSERT(d->opd_pre != NULL);
1481 spin_lock(&d->opd_pre_lock);
1482 osp_update_last_fid(d, fid);
1483 spin_unlock(&d->opd_pre_lock);
1486 CDEBUG(D_INODE, "fid for osp_object %p is "DFID"\n", o, PFID(fid));
1488 /* If the precreate ends, it means it will be ready to rollover to
1489 * the new sequence soon, all the creation should be synchronized,
1490 * otherwise during replay, the replay fid will be inconsistent with
1491 * last_used/create fid */
1492 if (osp_precreate_end_seq(env, d) && osp_is_fid_client(d))
1495 local_th = osp_get_storage_thandle(env, th, d);
1496 if (IS_ERR(local_th))
1497 RETURN(PTR_ERR(local_th));
1499 * it's OK if the import is inactive by this moment - id was created
1500 * by OST earlier, we just need to maintain it consistently on the disk
1501 * once import is reconnected, OSP will claim this and other objects
1502 * used and OST either keep them, if they exist or recreate
1505 /* we might have lost precreated objects */
1506 if (unlikely(d->opd_gap_count) > 0) {
1507 LASSERT(d->opd_pre != NULL);
1508 spin_lock(&d->opd_pre_lock);
1509 if (d->opd_gap_count > 0) {
1510 int count = d->opd_gap_count;
1512 rc = ostid_set_id(&osi->osi_oi,
1513 fid_oid(&d->opd_gap_start_fid));
1515 spin_unlock(&d->opd_pre_lock);
1518 d->opd_gap_count = 0;
1519 spin_unlock(&d->opd_pre_lock);
1521 CDEBUG(D_HA, "Writing gap "DFID"+%d in llog\n",
1522 PFID(&d->opd_gap_start_fid), count);
1523 /* real gap handling is disabled intil ORI-692 will be
1524 * fixed, now we only report gaps */
1526 spin_unlock(&d->opd_pre_lock);
1530 /* Only need update last_used oid file, seq file will only be update
1531 * during seq rollover */
1532 if (fid_is_idif((last_fid)))
1533 osi->osi_id = fid_idif_id(fid_seq(last_fid),
1534 fid_oid(last_fid), fid_ver(last_fid));
1536 osi->osi_id = fid_oid(last_fid);
1537 osp_objid_buf_prep(&osi->osi_lb, &osi->osi_off,
1538 &osi->osi_id, d->opd_index);
1540 rc = dt_record_write(env, d->opd_last_used_oid_file, &osi->osi_lb,
1541 &osi->osi_off, local_th);
1543 CDEBUG(D_HA, "%s: Wrote last used FID: "DFID", index %d: %d\n",
1544 d->opd_obd->obd_name, PFID(fid), d->opd_index, rc);
1550 * Implement OSP layer dt_object_operations::do_declare_destroy() interface.
1552 * Declare that the caller will destroy the specified OST object.
1554 * The OST object destroy will be handled via llog asynchronously. This
1555 * function will declare the credits for generating MDS_UNLINK64_REC llog.
1557 * \param[in] env pointer to the thread context
1558 * \param[in] dt pointer to the OSP layer dt_object to be destroyed
1559 * \param[in] th pointer to the transaction handler
1561 * \retval 0 for success
1562 * \retval negative error number on failure
1564 int osp_declare_destroy(const struct lu_env *env, struct dt_object *dt,
1567 struct osp_object *o = dt2osp_obj(dt);
1568 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
1573 LASSERT(!osp->opd_connect_mdt);
1575 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ))
1576 rc = osp_sync_declare_add(env, o, MDS_UNLINK64_REC, th);
1582 * Implement OSP layer dt_object_operations::do_destroy() interface.
1584 * Destroy the specified OST object.
1586 * The OSP generates a MDS_UNLINK64_REC record in the llog. There
1587 * will be some dedicated thread to handle the llog asynchronously.
1589 * It also marks the object as non-cached.
1591 * \param[in] env pointer to the thread context
1592 * \param[in] dt pointer to the OSP layer dt_object to be destroyed
1593 * \param[in] th pointer to the transaction handler
1595 * \retval 0 for success
1596 * \retval negative error number on failure
1598 static int osp_destroy(const struct lu_env *env, struct dt_object *dt,
1601 struct osp_object *o = dt2osp_obj(dt);
1602 struct osp_device *osp = lu2osp_dev(dt->do_lu.lo_dev);
1607 o->opo_non_exist = 1;
1609 LASSERT(!osp->opd_connect_mdt);
1611 if (!OBD_FAIL_CHECK(OBD_FAIL_LFSCK_LOST_MDTOBJ)) {
1612 /* once transaction is committed put proper command on
1613 * the queue going to our OST. */
1614 rc = osp_sync_add(env, o, MDS_UNLINK64_REC, th, NULL);
1619 /* not needed in cache any more */
1620 set_bit(LU_OBJECT_HEARD_BANSHEE, &dt->do_lu.lo_header->loh_flags);
1625 static int osp_orphan_index_lookup(const struct lu_env *env,
1626 struct dt_object *dt,
1628 const struct dt_key *key)
1633 static int osp_orphan_index_declare_insert(const struct lu_env *env,
1634 struct dt_object *dt,
1635 const struct dt_rec *rec,
1636 const struct dt_key *key,
1637 struct thandle *handle)
1642 static int osp_orphan_index_insert(const struct lu_env *env,
1643 struct dt_object *dt,
1644 const struct dt_rec *rec,
1645 const struct dt_key *key,
1646 struct thandle *handle)
1651 static int osp_orphan_index_declare_delete(const struct lu_env *env,
1652 struct dt_object *dt,
1653 const struct dt_key *key,
1654 struct thandle *handle)
1659 static int osp_orphan_index_delete(const struct lu_env *env,
1660 struct dt_object *dt,
1661 const struct dt_key *key,
1662 struct thandle *handle)
1668 * Initialize the OSP layer index iteration.
1670 * \param[in] env pointer to the thread context
1671 * \param[in] dt pointer to the index object to be iterated
1672 * \param[in] attr unused
1674 * \retval pointer to the iteration structure
1675 * \retval negative error number on failure
1677 struct dt_it *osp_it_init(const struct lu_env *env, struct dt_object *dt,
1684 return ERR_PTR(-ENOMEM);
1686 it->ooi_pos_ent = -1;
1688 it->ooi_attr = attr;
1690 return (struct dt_it *)it;
1694 * Finalize the OSP layer index iteration.
1696 * \param[in] env pointer to the thread context
1697 * \param[in] di pointer to the iteration structure
1699 void osp_it_fini(const struct lu_env *env, struct dt_it *di)
1701 struct osp_it *it = (struct osp_it *)di;
1702 struct page **pages = it->ooi_pages;
1703 int npages = it->ooi_total_npages;
1706 if (pages != NULL) {
1707 for (i = 0; i < npages; i++) {
1708 if (pages[i] != NULL) {
1709 if (pages[i] == it->ooi_cur_page) {
1711 it->ooi_cur_page = NULL;
1713 __free_page(pages[i]);
1716 OBD_FREE(pages, npages * sizeof(*pages));
1722 * Get more records for the iteration from peer.
1724 * The new records will be filled in an array of pages. The OSP side
1725 * allows 1MB bulk data to be transferred.
1727 * \param[in] env pointer to the thread context
1728 * \param[in] it pointer to the iteration structure
1730 * \retval 0 for success
1731 * \retval negative error number on failure
1733 static int osp_it_fetch(const struct lu_env *env, struct osp_it *it)
1735 struct lu_device *dev = it->ooi_obj->do_lu.lo_dev;
1736 struct osp_device *osp = lu2osp_dev(dev);
1737 struct page **pages;
1738 struct ptlrpc_request *req = NULL;
1739 struct ptlrpc_bulk_desc *desc;
1740 struct idx_info *ii;
1747 npages = min_t(unsigned int, OFD_MAX_BRW_SIZE, 1 << 20);
1748 npages /= PAGE_SIZE;
1750 OBD_ALLOC(pages, npages * sizeof(*pages));
1754 it->ooi_pages = pages;
1755 it->ooi_total_npages = npages;
1756 for (i = 0; i < npages; i++) {
1757 pages[i] = alloc_page(GFP_NOFS);
1758 if (pages[i] == NULL)
1762 req = ptlrpc_request_alloc(osp->opd_obd->u.cli.cl_import,
1767 rc = ptlrpc_request_pack(req, LUSTRE_OBD_VERSION, OBD_IDX_READ);
1769 ptlrpc_request_free(req);
1773 osp_set_req_replay(osp, req);
1774 req->rq_request_portal = OUT_PORTAL;
1775 ii = req_capsule_client_get(&req->rq_pill, &RMF_IDX_INFO);
1776 memset(ii, 0, sizeof(*ii));
1777 if (fid_is_last_id(lu_object_fid(&it->ooi_obj->do_lu))) {
1778 /* LFSCK will iterate orphan object[FID_SEQ_LAYOUT_BTREE,
1779 * ost_index, 0] with LAST_ID FID, so it needs to replace
1780 * the FID with orphan FID here */
1781 ii->ii_fid.f_seq = FID_SEQ_LAYOUT_RBTREE;
1782 ii->ii_fid.f_oid = osp->opd_index;
1783 ii->ii_fid.f_ver = 0;
1784 ii->ii_flags = II_FL_NOHASH;
1785 ii->ii_attrs = osp_dev2node(osp);
1787 ii->ii_fid = *lu_object_fid(&it->ooi_obj->do_lu);
1788 ii->ii_flags = II_FL_NOHASH | II_FL_NOKEY | II_FL_VARKEY |
1790 ii->ii_attrs = it->ooi_attr;
1792 ii->ii_magic = IDX_INFO_MAGIC;
1793 ii->ii_count = npages * LU_PAGE_COUNT;
1794 ii->ii_hash_start = it->ooi_next;
1796 ptlrpc_at_set_req_timeout(req);
1798 desc = ptlrpc_prep_bulk_imp(req, npages, 1,
1799 PTLRPC_BULK_PUT_SINK | PTLRPC_BULK_BUF_KIOV,
1801 &ptlrpc_bulk_kiov_pin_ops);
1803 GOTO(out, rc = -ENOMEM);
1805 for (i = 0; i < npages; i++)
1806 desc->bd_frag_ops->add_kiov_frag(desc, pages[i], 0,
1809 ptlrpc_request_set_replen(req);
1810 rc = ptlrpc_queue_wait(req);
1814 rc = sptlrpc_cli_unwrap_bulk_read(req, req->rq_bulk,
1815 req->rq_bulk->bd_nob_transferred);
1820 ii = req_capsule_server_get(&req->rq_pill, &RMF_IDX_INFO);
1821 if (ii->ii_magic != IDX_INFO_MAGIC)
1822 GOTO(out, rc = -EPROTO);
1824 npages = (ii->ii_count + LU_PAGE_COUNT - 1) >>
1825 (PAGE_SHIFT - LU_PAGE_SHIFT);
1826 if (npages > it->ooi_total_npages) {
1827 CERROR("%s: returned more pages than expected, %u > %u\n",
1828 osp->opd_obd->obd_name, npages, it->ooi_total_npages);
1829 GOTO(out, rc = -EINVAL);
1832 it->ooi_rec_size = ii->ii_recsize;
1833 it->ooi_valid_npages = npages;
1834 if (ptlrpc_rep_need_swab(req))
1837 it->ooi_next = ii->ii_hash_end;
1840 ptlrpc_req_finished(req);
1846 * Move the iteration cursor to the next lu_page.
1848 * One system page (PAGE_SIZE) may contain multiple lu_page (4KB),
1849 * that depends on the LU_PAGE_COUNT. If it is not the last lu_page
1850 * in current system page, then move the iteration cursor to the next
1851 * lu_page in current system page. Otherwise, if there are more system
1852 * pages in the cache, then move the iteration cursor to the next system
1853 * page. If all the cached records (pages) have been iterated, then fetch
1854 * more records via osp_it_fetch().
1856 * \param[in] env pointer to the thread context
1857 * \param[in] di pointer to the iteration structure
1859 * \retval positive for end of the directory
1860 * \retval 0 for success
1861 * \retval negative error number on failure
1863 int osp_it_next_page(const struct lu_env *env, struct dt_it *di)
1865 struct osp_it *it = (struct osp_it *)di;
1866 struct lu_idxpage *idxpage;
1867 struct page **pages;
1873 idxpage = it->ooi_cur_idxpage;
1874 if (idxpage != NULL) {
1875 if (idxpage->lip_nr == 0)
1878 if (it->ooi_pos_ent < idxpage->lip_nr) {
1879 CDEBUG(D_INFO, "ooi_pos %d nr %d\n",
1880 (int)it->ooi_pos_ent, (int)idxpage->lip_nr);
1883 it->ooi_cur_idxpage = NULL;
1884 it->ooi_pos_lu_page++;
1887 if (it->ooi_pos_lu_page < LU_PAGE_COUNT) {
1888 it->ooi_cur_idxpage = (void *)it->ooi_cur_page +
1889 LU_PAGE_SIZE * it->ooi_pos_lu_page;
1891 lustre_swab_lip_header(it->ooi_cur_idxpage);
1892 if (it->ooi_cur_idxpage->lip_magic != LIP_MAGIC) {
1893 struct osp_device *osp =
1894 lu2osp_dev(it->ooi_obj->do_lu.lo_dev);
1896 CERROR("%s: invalid magic (%x != %x) for page "
1897 "%d/%d while read layout orphan index\n",
1898 osp->opd_obd->obd_name,
1899 it->ooi_cur_idxpage->lip_magic,
1900 LIP_MAGIC, it->ooi_pos_page,
1901 it->ooi_pos_lu_page);
1902 /* Skip this lu_page next time. */
1903 it->ooi_pos_ent = idxpage->lip_nr - 1;
1906 it->ooi_pos_ent = -1;
1910 kunmap(it->ooi_cur_page);
1911 it->ooi_cur_page = NULL;
1915 pages = it->ooi_pages;
1916 if (it->ooi_pos_page < it->ooi_valid_npages) {
1917 it->ooi_cur_page = kmap(pages[it->ooi_pos_page]);
1918 it->ooi_pos_lu_page = 0;
1922 for (i = 0; i < it->ooi_total_npages; i++) {
1923 if (pages[i] != NULL)
1924 __free_page(pages[i]);
1926 OBD_FREE(pages, it->ooi_total_npages * sizeof(*pages));
1928 it->ooi_pos_page = 0;
1929 it->ooi_total_npages = 0;
1930 it->ooi_valid_npages = 0;
1933 it->ooi_cur_page = NULL;
1934 it->ooi_cur_idxpage = NULL;
1935 it->ooi_pages = NULL;
1938 if (it->ooi_next == II_END_OFF)
1941 rc = osp_it_fetch(env, it);
1949 * Move the iteration cursor to the next record.
1951 * If there are more records in the lu_page, then move the iteration
1952 * cursor to the next record directly. Otherwise, move the iteration
1953 * cursor to the record in the next lu_page via osp_it_next_page()
1955 * \param[in] env pointer to the thread context
1956 * \param[in] di pointer to the iteration structure
1958 * \retval positive for end of the directory
1959 * \retval 0 for success
1960 * \retval negative error number on failure
1962 static int osp_orphan_it_next(const struct lu_env *env, struct dt_it *di)
1964 struct osp_it *it = (struct osp_it *)di;
1965 struct lu_idxpage *idxpage;
1970 idxpage = it->ooi_cur_idxpage;
1971 if (idxpage != NULL) {
1972 if (idxpage->lip_nr == 0)
1976 if (it->ooi_pos_ent < idxpage->lip_nr) {
1977 if (it->ooi_rec_size ==
1978 sizeof(struct lu_orphan_rec_v3)) {
1980 (struct lu_orphan_ent_v3 *)idxpage->lip_entries+
1983 lustre_swab_orphan_ent_v3(it->ooi_ent);
1984 } else if (it->ooi_rec_size ==
1985 sizeof(struct lu_orphan_rec_v2)) {
1987 (struct lu_orphan_ent_v2 *)idxpage->lip_entries+
1990 lustre_swab_orphan_ent_v2(it->ooi_ent);
1993 (struct lu_orphan_ent *)idxpage->lip_entries +
1996 lustre_swab_orphan_ent(it->ooi_ent);
2002 rc = osp_it_next_page(env, di);
2009 int osp_it_get(const struct lu_env *env, struct dt_it *di,
2010 const struct dt_key *key)
2015 void osp_it_put(const struct lu_env *env, struct dt_it *di)
2019 static struct dt_key *osp_orphan_it_key(const struct lu_env *env,
2020 const struct dt_it *di)
2022 struct osp_it *it = (struct osp_it *)di;
2023 struct lu_orphan_ent *ent = (struct lu_orphan_ent *)it->ooi_ent;
2025 if (likely(ent != NULL))
2026 return (struct dt_key *)(&ent->loe_key);
2031 static int osp_orphan_it_key_size(const struct lu_env *env,
2032 const struct dt_it *di)
2034 return sizeof(struct lu_fid);
2037 static int osp_orphan_it_rec(const struct lu_env *env, const struct dt_it *di,
2038 struct dt_rec *rec, __u32 attr)
2040 struct osp_it *it = (struct osp_it *)di;
2042 if (likely(it->ooi_ent)) {
2043 if (it->ooi_rec_size == sizeof(struct lu_orphan_rec_v3)) {
2044 struct lu_orphan_ent_v3 *ent =
2045 (struct lu_orphan_ent_v3 *)it->ooi_ent;
2047 *(struct lu_orphan_rec_v3 *)rec = ent->loe_rec;
2048 } else if (it->ooi_rec_size ==
2049 sizeof(struct lu_orphan_rec_v2)) {
2050 struct lu_orphan_ent_v2 *ent =
2051 (struct lu_orphan_ent_v2 *)it->ooi_ent;
2053 *(struct lu_orphan_rec_v2 *)rec = ent->loe_rec;
2055 struct lu_orphan_ent *ent =
2056 (struct lu_orphan_ent *)it->ooi_ent;
2058 *(struct lu_orphan_rec *)rec = ent->loe_rec;
2066 __u64 osp_it_store(const struct lu_env *env, const struct dt_it *di)
2068 struct osp_it *it = (struct osp_it *)di;
2070 return it->ooi_next;
2074 * Locate the iteration cursor to the specified position (cookie).
2076 * \param[in] env pointer to the thread context
2077 * \param[in] di pointer to the iteration structure
2078 * \param[in] hash the specified position
2080 * \retval positive number for locating to the exactly position
2082 * \retval 0 for arriving at the end of the iteration
2083 * \retval negative error number on failure
2085 int osp_orphan_it_load(const struct lu_env *env, const struct dt_it *di,
2088 struct osp_it *it = (struct osp_it *)di;
2091 it->ooi_next = hash;
2092 rc = osp_orphan_it_next(env, (struct dt_it *)di);
2102 int osp_it_key_rec(const struct lu_env *env, const struct dt_it *di,
2108 static const struct dt_index_operations osp_orphan_index_ops = {
2109 .dio_lookup = osp_orphan_index_lookup,
2110 .dio_declare_insert = osp_orphan_index_declare_insert,
2111 .dio_insert = osp_orphan_index_insert,
2112 .dio_declare_delete = osp_orphan_index_declare_delete,
2113 .dio_delete = osp_orphan_index_delete,
2115 .init = osp_it_init,
2116 .fini = osp_it_fini,
2117 .next = osp_orphan_it_next,
2120 .key = osp_orphan_it_key,
2121 .key_size = osp_orphan_it_key_size,
2122 .rec = osp_orphan_it_rec,
2123 .store = osp_it_store,
2124 .load = osp_orphan_it_load,
2125 .key_rec = osp_it_key_rec,
2130 * Implement OSP layer dt_object_operations::do_index_try() interface.
2132 * Negotiate the index type.
2134 * If the target index is an IDIF object, then use osp_orphan_index_ops.
2135 * Otherwise, assign osp_md_index_ops to the dt_object::do_index_ops.
2136 * (\see lustre/include/lustre_fid.h for IDIF.)
2138 * \param[in] env pointer to the thread context
2139 * \param[in] dt pointer to the OSP layer dt_object
2140 * \param[in] feat unused
2142 * \retval 0 for success
2144 static int osp_index_try(const struct lu_env *env,
2145 struct dt_object *dt,
2146 const struct dt_index_features *feat)
2148 const struct lu_fid *fid = lu_object_fid(&dt->do_lu);
2150 if (fid_is_last_id(fid) && fid_is_idif(fid))
2151 dt->do_index_ops = &osp_orphan_index_ops;
2153 dt->do_index_ops = &osp_md_index_ops;
2157 static struct dt_object_operations osp_obj_ops = {
2158 .do_declare_attr_get = osp_declare_attr_get,
2159 .do_attr_get = osp_attr_get,
2160 .do_declare_attr_set = osp_declare_attr_set,
2161 .do_attr_set = osp_attr_set,
2162 .do_declare_xattr_get = osp_declare_xattr_get,
2163 .do_xattr_get = osp_xattr_get,
2164 .do_declare_xattr_set = osp_declare_xattr_set,
2165 .do_xattr_set = osp_xattr_set,
2166 .do_declare_create = osp_declare_create,
2167 .do_create = osp_create,
2168 .do_declare_destroy = osp_declare_destroy,
2169 .do_destroy = osp_destroy,
2170 .do_index_try = osp_index_try,
2174 * Implement OSP layer lu_object_operations::loo_object_init() interface.
2176 * Initialize the object.
2178 * If it is a remote MDT object, then call do_attr_get() to fetch
2179 * the attribute from the peer.
2181 * \param[in] env pointer to the thread context
2182 * \param[in] o pointer to the OSP layer lu_object
2183 * \param[in] conf unused
2185 * \retval 0 for success
2186 * \retval negative error number on failure
2188 static int osp_object_init(const struct lu_env *env, struct lu_object *o,
2189 const struct lu_object_conf *conf)
2191 struct osp_object *po = lu2osp_obj(o);
2195 spin_lock_init(&po->opo_lock);
2196 o->lo_header->loh_attr |= LOHA_REMOTE;
2197 INIT_LIST_HEAD(&po->opo_xattr_list);
2198 INIT_LIST_HEAD(&po->opo_invalidate_cb_list);
2200 if (is_ost_obj(o)) {
2201 po->opo_obj.do_ops = &osp_obj_ops;
2203 struct lu_attr *la = &osp_env_info(env)->osi_attr;
2205 po->opo_obj.do_ops = &osp_md_obj_ops;
2206 po->opo_obj.do_body_ops = &osp_md_body_ops;
2208 if (conf != NULL && conf->loc_flags & LOC_F_NEW) {
2209 po->opo_non_exist = 1;
2211 rc = po->opo_obj.do_ops->do_attr_get(env, lu2dt_obj(o),
2214 o->lo_header->loh_attr |=
2215 LOHA_EXISTS | (la->la_mode & S_IFMT);
2216 if (rc == -ENOENT) {
2217 po->opo_non_exist = 1;
2221 init_rwsem(&po->opo_sem);
2227 * Implement OSP layer lu_object_operations::loo_object_free() interface.
2229 * Finalize the object.
2231 * If the OSP object has attributes cache, then destroy the cache.
2232 * Free the object finally.
2234 * \param[in] env pointer to the thread context
2235 * \param[in] o pointer to the OSP layer lu_object
2237 static void osp_object_free(const struct lu_env *env, struct lu_object *o)
2239 struct osp_object *obj = lu2osp_obj(o);
2240 struct lu_object_header *h = o->lo_header;
2241 struct osp_xattr_entry *oxe;
2242 struct osp_xattr_entry *tmp;
2245 dt_object_fini(&obj->opo_obj);
2246 lu_object_header_fini(h);
2247 list_for_each_entry_safe(oxe, tmp, &obj->opo_xattr_list, oxe_list) {
2248 list_del(&oxe->oxe_list);
2249 count = atomic_read(&oxe->oxe_ref);
2250 LASSERTF(count == 1,
2251 "Still has %d users on the xattr entry %.*s\n",
2252 count-1, (int)oxe->oxe_namelen, oxe->oxe_buf);
2254 OBD_FREE(oxe, oxe->oxe_buflen);
2256 OBD_SLAB_FREE_PTR(obj, osp_object_kmem);
2260 * Implement OSP layer lu_object_operations::loo_object_release() interface.
2262 * Cleanup (not free) the object.
2264 * If it is a reserved object but failed to be created, or it is an OST
2265 * object, then mark the object as non-cached.
2267 * \param[in] env pointer to the thread context
2268 * \param[in] o pointer to the OSP layer lu_object
2270 static void osp_object_release(const struct lu_env *env, struct lu_object *o)
2272 struct osp_object *po = lu2osp_obj(o);
2273 struct osp_device *d = lu2osp_dev(o->lo_dev);
2278 * release reservation if object was declared but not created
2279 * this may require lu_object_put() in LOD
2281 if (unlikely(po->opo_reserved)) {
2282 LASSERT(d->opd_pre != NULL);
2283 LASSERT(d->opd_pre_reserved > 0);
2284 spin_lock(&d->opd_pre_lock);
2285 d->opd_pre_reserved--;
2286 spin_unlock(&d->opd_pre_lock);
2289 * Check that osp_precreate_cleanup_orphans is not blocked
2290 * due to opd_pre_reserved > 0.
2292 if (unlikely(d->opd_pre_reserved == 0 &&
2293 (d->opd_pre_recovering || d->opd_pre_status)))
2294 wake_up(&d->opd_pre_waitq);
2296 /* not needed in cache any more */
2297 set_bit(LU_OBJECT_HEARD_BANSHEE, &o->lo_header->loh_flags);
2301 /* XXX: Currently, NOT cache OST-object on MDT because:
2302 * 1. it is not often accessed on MDT.
2303 * 2. avoid up layer (such as LFSCK) to load too many
2304 * once-used OST-objects. */
2305 set_bit(LU_OBJECT_HEARD_BANSHEE, &o->lo_header->loh_flags);
2310 static int osp_object_print(const struct lu_env *env, void *cookie,
2311 lu_printer_t p, const struct lu_object *l)
2313 const struct osp_object *o = lu2osp_obj((struct lu_object *)l);
2315 return (*p)(env, cookie, LUSTRE_OSP_NAME"-object@%p", o);
2318 static int osp_object_invariant(const struct lu_object *o)
2323 struct lu_object_operations osp_lu_obj_ops = {
2324 .loo_object_init = osp_object_init,
2325 .loo_object_free = osp_object_free,
2326 .loo_object_release = osp_object_release,
2327 .loo_object_print = osp_object_print,
2328 .loo_object_invariant = osp_object_invariant