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) 2009, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
26 * Copyright (c) 2012, 2016, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/ofd/ofd_obd.c
34 * This file contains OBD API methods for OBD Filter Device (OFD) which are
35 * used for export handling, configuration purposes and recovery.
36 * Several methods are used by ECHO client only since it still uses OBD API.
37 * Such methods have _echo_ prefix in name.
39 * Author: Andreas Dilger <andreas.dilger@intel.com>
40 * Author: Alexey Zhuravlev <alexey.zhuravlev@intel.com>
41 * Author: Mikhail Pershin <mike.pershin@intel.com>
44 #define DEBUG_SUBSYSTEM S_FILTER
46 #include "ofd_internal.h"
47 #include <obd_cksum.h>
48 #include <uapi/linux/lustre/lustre_ioctl.h>
49 #include <lustre_quota.h>
50 #include <lustre_lfsck.h>
51 #include <lustre_nodemap.h>
54 * Initialize OFD per-export statistics.
56 * This function sets up procfs entries for various OFD export counters. These
57 * counters are for per-client statistics tracked on the server.
59 * \param[in] ofd OFD device
60 * \param[in] exp OBD export
61 * \param[in] client_nid NID of client
63 * \retval 0 if successful
64 * \retval negative value on error
66 static int ofd_export_stats_init(struct ofd_device *ofd,
67 struct obd_export *exp,
68 lnet_nid_t *client_nid)
70 struct obd_device *obd = ofd_obd(ofd);
71 struct nid_stat *stats;
75 LASSERT(obd->obd_uses_nid_stats);
77 if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
78 /* Self-export gets no proc entry */
81 rc = lprocfs_exp_setup(exp, client_nid);
83 /* Mask error for already created /proc entries */
84 RETURN(rc == -EALREADY ? 0 : rc);
86 stats = exp->exp_nid_stats;
87 stats->nid_stats = lprocfs_alloc_stats(NUM_OBD_STATS +
89 LPROCFS_STATS_FLAG_NOPERCPU);
90 if (stats->nid_stats == NULL)
93 lprocfs_init_ops_stats(LPROC_OFD_STATS_LAST, stats->nid_stats);
95 ofd_stats_counter_init(stats->nid_stats);
97 rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats);
99 lprocfs_free_stats(&stats->nid_stats);
103 rc = lprocfs_nid_ldlm_stats_init(stats);
112 * Match client and OST server connection feature flags.
114 * Compute the compatibility flags for a connection request based on
115 * features mutually supported by client and server.
117 * The obd_export::exp_connect_data.ocd_connect_flags field in \a exp
118 * must not be updated here, otherwise a partially initialized value may
119 * be exposed. After the connection request is successfully processed,
120 * the top-level tgt_connect() request handler atomically updates the export
121 * connect flags from the obd_connect_data::ocd_connect_flags field of the
122 * reply. \see tgt_connect().
124 * Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a
125 * full struct obd_connect_data. So care must be taken when accessing fields
126 * that are not present in struct obd_connect_data_v1. See LU-16.
128 * \param[in] env execution environment
129 * \param[in] exp the obd_export associated with this
131 * \param[in] data stores data for this connect request
132 * \param[in] new_connection is this connection new or not
134 * \retval 0 if success
135 * \retval -EPROTO client and server feature requirements are
137 * \retval -EBADF OST index in connect request doesn't match
140 static int ofd_parse_connect_data(const struct lu_env *env,
141 struct obd_export *exp,
142 struct obd_connect_data *data,
145 struct ofd_device *ofd = ofd_exp(exp);
146 struct filter_export_data *fed = &exp->exp_filter_data;
151 CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: %#llx"
152 " ocd_version: %x ocd_grant: %d ocd_index: %u"
154 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
155 data->ocd_connect_flags, data->ocd_version,
156 data->ocd_grant, data->ocd_index, data->ocd_group);
158 if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
159 CWARN("!!! This export (nid %s) used object group %d "
160 "earlier; now it's trying to use group %d! This could "
161 "be a bug in the MDS. Please report to "
162 "https://jira.hpdd.intel.com/\n",
163 obd_export_nid2str(exp), fed->fed_group,
167 fed->fed_group = data->ocd_group;
169 data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
171 if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
172 data->ocd_connect_flags2 &= OST_CONNECT_SUPPORTED2;
174 data->ocd_version = LUSTRE_VERSION_CODE;
176 /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
177 if (data->ocd_connect_flags & OBD_CONNECT_MDS)
178 CDEBUG(D_HA, "%s: Received MDS connection for group %u\n",
179 exp->exp_obd->obd_name, data->ocd_group);
180 else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
183 /* Determine optimal brw size before calculating grant */
184 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
185 data->ocd_brw_size = 65536;
186 } else if (OCD_HAS_FLAG(data, BRW_SIZE)) {
187 if (data->ocd_brw_size > ofd->ofd_brw_size)
188 data->ocd_brw_size = ofd->ofd_brw_size;
189 if (data->ocd_brw_size == 0) {
190 CERROR("%s: cli %s/%p ocd_connect_flags: %#llx"
191 " ocd_version: %x ocd_grant: %d ocd_index: %u "
192 "ocd_brw_size is unexpectedly zero, "
193 "network data corruption?"
194 "Refusing connection of this client\n",
195 exp->exp_obd->obd_name,
196 exp->exp_client_uuid.uuid,
197 exp, data->ocd_connect_flags, data->ocd_version,
198 data->ocd_grant, data->ocd_index);
203 if (OCD_HAS_FLAG(data, GRANT_PARAM)) {
204 struct dt_device_param *ddp = &ofd->ofd_lut.lut_dt_conf;
206 /* client is reporting its page size, for future use */
207 exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits;
208 data->ocd_grant_blkbits = ofd->ofd_lut.lut_tgd.tgd_blockbits;
209 /* ddp_inodespace may not be power-of-two value, eg. for ldiskfs
210 * it's LDISKFS_DIR_REC_LEN(20) = 28. */
211 data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1);
212 /* ocd_grant_tax_kb is in 1K byte blocks */
213 data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10;
214 data->ocd_grant_max_blks = ddp->ddp_max_extent_blks;
217 if (OCD_HAS_FLAG(data, GRANT)) {
218 /* Save connect_data we have so far because tgt_grant_connect()
219 * uses it to calculate grant. */
220 exp->exp_connect_data = *data;
221 tgt_grant_connect(env, exp, data, new_connection);
224 if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
225 struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
226 int index = lsd->lsd_osd_index;
228 if (index != data->ocd_index) {
229 LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
230 " %u doesn't match actual OST index"
231 " %u in last_rcvd file, bad "
233 obd_export_nid2str(exp), index,
237 if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
238 /* this will only happen on the first connect */
239 lsd->lsd_feature_compat |= OBD_COMPAT_OST;
240 /* sync is not needed here as tgt_client_new will
241 * set exp_need_sync flag */
242 tgt_server_data_update(env, &ofd->ofd_lut, 0);
246 if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
247 __u32 cksum_types = data->ocd_cksum_types;
249 /* The client set in ocd_cksum_types the checksum types it
250 * supports. We have to mask off the algorithms that we don't
252 data->ocd_cksum_types &= ofd->ofd_cksum_types_supported;
254 if (unlikely(data->ocd_cksum_types == 0)) {
255 CERROR("%s: Connect with checksum support but no "
256 "ocd_cksum_types is set\n",
257 exp->exp_obd->obd_name);
261 CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return "
262 "%x\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
263 cksum_types, data->ocd_cksum_types);
265 /* This client does not support OBD_CONNECT_CKSUM.
266 * Report failure to negotiate checksum at connect */
267 CDEBUG(D_RPCTRACE, "%s: cli %s does not support "
268 "OBD_CONNECT_CKSUM\n",
269 exp->exp_obd->obd_name, obd_export_nid2str(exp));
272 if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
273 data->ocd_maxbytes = ofd->ofd_lut.lut_dt_conf.ddp_maxbytes;
275 if (OCD_HAS_FLAG(data, PINGLESS)) {
276 if (ptlrpc_pinger_suppress_pings()) {
277 spin_lock(&exp->exp_obd->obd_dev_lock);
278 list_del_init(&exp->exp_obd_chain_timed);
279 spin_unlock(&exp->exp_obd->obd_dev_lock);
281 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
289 * Re-initialize export upon client reconnection.
291 * This function parses connection data from reconnect and resets
294 * \param[in] env execution environment
295 * \param[in] exp OBD export
296 * \param[in] obd OFD device
297 * \param[in] cluuid NID of client
298 * \param[in] data connection data from request
299 * \param[in] localdata client NID
301 * \retval 0 if successful
302 * \retval negative value on error
304 static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
305 struct obd_device *obd, struct obd_uuid *cluuid,
306 struct obd_connect_data *data,
309 struct ofd_device *ofd;
314 if (exp == NULL || obd == NULL || cluuid == NULL)
317 rc = nodemap_add_member(*(lnet_nid_t *)client_nid, exp);
318 if (rc != 0 && rc != -EEXIST)
321 ofd = ofd_dev(obd->obd_lu_dev);
323 rc = ofd_parse_connect_data(env, exp, data, false);
325 ofd_export_stats_init(ofd, exp, client_nid);
327 nodemap_del_member(exp);
333 * Initialize new client connection.
335 * This function handles new connection to the OFD. The new export is
336 * created (in context of class_connect()) and persistent client data is
337 * initialized on storage.
339 * \param[in] env execution environment
340 * \param[out] _exp stores pointer to new export
341 * \param[in] obd OFD device
342 * \param[in] cluuid client UUID
343 * \param[in] data connection data from request
344 * \param[in] localdata client NID
346 * \retval 0 if successful
347 * \retval negative value on error
349 static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
350 struct obd_device *obd, struct obd_uuid *cluuid,
351 struct obd_connect_data *data, void *localdata)
353 struct obd_export *exp;
354 struct ofd_device *ofd;
355 struct lustre_handle conn = { 0 };
359 if (_exp == NULL || obd == NULL || cluuid == NULL)
362 ofd = ofd_dev(obd->obd_lu_dev);
364 rc = class_connect(&conn, obd, cluuid);
368 exp = class_conn2export(&conn);
369 LASSERT(exp != NULL);
371 if (localdata != NULL) {
372 rc = nodemap_add_member(*(lnet_nid_t *)localdata, exp);
373 if (rc != 0 && rc != -EEXIST)
376 CDEBUG(D_HA, "%s: cannot find nodemap for client %s: "
377 "nid is null\n", obd->obd_name, cluuid->uuid);
380 rc = ofd_parse_connect_data(env, exp, data, true);
384 if (obd->obd_replayable) {
385 struct tg_export_data *ted = &exp->exp_target_data;
387 memcpy(ted->ted_lcd->lcd_uuid, cluuid,
388 sizeof(ted->ted_lcd->lcd_uuid));
389 rc = tgt_client_new(env, exp);
392 ofd_export_stats_init(ofd, exp, localdata);
395 CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name,
396 data ? data->ocd_group : -1);
400 class_disconnect(exp);
401 nodemap_del_member(exp);
410 * Disconnect a connected client.
412 * This function terminates the client connection. The client export is
413 * disconnected (cleaned up) and client data on persistent storage is removed.
415 * \param[in] exp OBD export
417 * \retval 0 if successful
418 * \retval negative value on error
420 int ofd_obd_disconnect(struct obd_export *exp)
422 struct ofd_device *ofd = ofd_exp(exp);
429 class_export_get(exp);
431 if (!(exp->exp_flags & OBD_OPT_FORCE))
432 tgt_grant_sanity_check(ofd_obd(ofd), __func__);
434 rc = server_disconnect_export(exp);
436 tgt_grant_discard(exp);
438 /* Do not erase record for recoverable client. */
439 if (exp->exp_obd->obd_replayable &&
440 (!exp->exp_obd->obd_fail || exp->exp_failed)) {
441 rc = lu_env_init(&env, LCT_DT_THREAD);
445 tgt_client_del(&env, exp);
449 nodemap_del_member(exp);
450 class_export_put(exp);
455 * Implementation of obd_ops::o_init_export.
457 * This function is called from class_new_export() and initializes
458 * the OFD-specific data for new export.
460 * \param[in] exp OBD export
462 * \retval 0 if successful
463 * \retval negative value on error
465 static int ofd_init_export(struct obd_export *exp)
469 spin_lock_init(&exp->exp_filter_data.fed_lock);
470 INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
471 atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0);
472 spin_lock(&exp->exp_lock);
473 exp->exp_connecting = 1;
474 spin_unlock(&exp->exp_lock);
476 /* self-export doesn't need client data and ldlm initialization */
477 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
478 &exp->exp_client_uuid)))
481 rc = tgt_client_alloc(exp);
483 ldlm_init_export(exp);
485 CERROR("%s: Can't initialize export: rc %d\n",
486 exp->exp_obd->obd_name, rc);
491 * Implementation of obd_ops::o_destroy_export.
493 * This function is called from class_export_destroy() to cleanup
494 * the OFD-specific data for export being destroyed.
496 * \param[in] exp OBD export
498 * \retval 0 if successful
499 * \retval negative value on error
501 static int ofd_destroy_export(struct obd_export *exp)
503 struct ofd_device *ofd = ofd_exp(exp);
505 if (exp->exp_target_data.ted_pending)
506 CERROR("%s: cli %s/%p has %lu pending on destroyed export"
507 "\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
508 exp, exp->exp_target_data.ted_pending);
510 target_destroy_export(exp);
512 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
513 &exp->exp_client_uuid)))
516 ldlm_destroy_export(exp);
517 tgt_client_free(exp);
519 ofd_fmd_cleanup(exp);
522 * discard grants once we're sure no more
523 * interaction with the client is possible
525 tgt_grant_discard(exp);
526 ofd_fmd_cleanup(exp);
528 if (exp_connect_flags(exp) & OBD_CONNECT_GRANT)
529 ofd->ofd_lut.lut_tgd.tgd_tot_granted_clients--;
531 if (!(exp->exp_flags & OBD_OPT_FORCE))
532 tgt_grant_sanity_check(exp->exp_obd, __func__);
534 LASSERT(list_empty(&exp->exp_filter_data.fed_mod_list));
539 * Notify all devices in server stack about recovery completion.
541 * This function calls ldo_recovery_complete() for all lower devices in the
542 * server stack so they will be prepared for normal operations.
544 * \param[in] env execution environment
545 * \param[in] ofd OFD device
547 * \retval 0 if successful
548 * \retval negative value on error
550 int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd)
552 struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev;
555 CDEBUG(D_HA, "%s: recovery is over\n", ofd_name(ofd));
557 if (!ofd->ofd_skip_lfsck && !ofd->ofd_osd->dd_rdonly) {
558 struct lfsck_start_param lsp;
560 lsp.lsp_start = NULL;
561 lsp.lsp_index_valid = 0;
562 rc = lfsck_start(env, ofd->ofd_osd, &lsp);
563 if (rc != 0 && rc != -EALREADY)
564 CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
568 return ldev->ld_ops->ldo_recovery_complete(env, ldev);
572 * Implementation of obd_ops::o_postrecov.
574 * This function is called from target_finish_recovery() upon recovery
577 * \param[in] obd OBD device of OFD
579 * \retval 0 if successful
580 * \retval negative value on error
582 static int ofd_obd_postrecov(struct obd_device *obd)
585 struct lu_device *ldev = obd->obd_lu_dev;
590 rc = lu_env_init(&env, LCT_DT_THREAD);
593 ofd_info_init(&env, obd->obd_self_export);
595 rc = ofd_postrecov(&env, ofd_dev(ldev));
602 * Implementation of obd_ops::o_set_info_async.
604 * This function is not called from request handler, it is only used by
605 * class_notify_sptlrpc_conf() locally by direct obd_set_info_async() call.
606 * \see ofd_set_info_hdl() for request handler function.
608 * \param[in] env execution environment
609 * \param[in] exp OBD export of OFD device
610 * \param[in] keylen length of \a key
611 * \param[in] key key name
612 * \param[in] vallen length of \a val
613 * \param[in] val the \a key value
614 * \param[in] set not used in OFD
616 * \retval 0 if successful
617 * \retval negative value on error
619 static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
620 __u32 keylen, void *key, __u32 vallen, void *val,
621 struct ptlrpc_request_set *set)
627 if (exp->exp_obd == NULL) {
628 CDEBUG(D_IOCTL, "invalid export %p\n", exp);
632 if (KEY_IS(KEY_SPTLRPC_CONF)) {
633 rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp));
635 CERROR("%s: Unsupported key %s\n",
636 exp->exp_obd->obd_name, (char*)key);
643 * Implementation of obd_ops::o_get_info.
645 * This function is not called from request handler, it is only used by
646 * direct call from nrs_orr_range_fill_physical() in ptlrpc, see LU-3239.
648 * \see ofd_get_info_hdl() for request handler function.
650 * \param[in] env execution environment
651 * \param[in] exp OBD export of OFD device
652 * \param[in] keylen length of \a key
653 * \param[in] key key name
654 * \param[out] vallen length of key value
655 * \param[out] val the key value to return
657 * \retval 0 if successful
658 * \retval negative value on error
660 static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
661 __u32 keylen, void *key, __u32 *vallen, void *val)
663 struct ofd_thread_info *info;
664 struct ofd_device *ofd;
665 struct ll_fiemap_info_key *fm_key = key;
666 struct fiemap *fiemap = val;
671 if (exp->exp_obd == NULL) {
672 CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
678 if (KEY_IS(KEY_FIEMAP)) {
679 info = ofd_info_init(env, exp);
681 rc = ostid_to_fid(&info->fti_fid, &fm_key->lfik_oa.o_oi,
682 ofd->ofd_lut.lut_lsd.lsd_osd_index);
686 rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap);
688 CERROR("%s: not supported key %s\n", ofd_name(ofd), (char*)key);
696 * Implementation of obd_ops::o_statfs.
698 * This function returns information about a storage file system.
699 * It is called from several places by using the OBD API as well as
700 * by direct call, e.g. from request handler.
702 * \see ofd_statfs_hdl() for request handler function.
704 * Report also the state of the OST to the caller in osfs->os_state
705 * (OS_STATE_READONLY, OS_STATE_DEGRADED).
707 * \param[in] env execution environment
708 * \param[in] exp OBD export of OFD device
709 * \param[out] osfs statistic data to return
710 * \param[in] max_age maximum age for cached data
711 * \param[in] flags not used in OFD
713 * \retval 0 if successful
714 * \retval negative value on error
716 int ofd_statfs(const struct lu_env *env, struct obd_export *exp,
717 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
719 struct obd_device *obd = class_exp2obd(exp);
720 struct ofd_device *ofd = ofd_exp(exp);
721 struct tg_grants_data *tgd = &ofd->ofd_lut.lut_tgd;
726 rc = tgt_statfs_internal(env, &ofd->ofd_lut, osfs, max_age, NULL);
730 /* at least try to account for cached pages. its still racy and
731 * might be under-reporting if clients haven't announced their
732 * caches with brw recently */
734 CDEBUG(D_SUPER | D_CACHE, "blocks cached %llu granted %llu"
735 " pending %llu free %llu avail %llu\n",
736 tgd->tgd_tot_dirty, tgd->tgd_tot_granted,
737 tgd->tgd_tot_pending,
738 osfs->os_bfree << tgd->tgd_blockbits,
739 osfs->os_bavail << tgd->tgd_blockbits);
741 osfs->os_bavail -= min_t(u64, osfs->os_bavail,
742 ((tgd->tgd_tot_dirty + tgd->tgd_tot_pending +
743 osfs->os_bsize - 1) >> tgd->tgd_blockbits));
745 /* The QoS code on the MDS does not care about space reserved for
746 * precreate, so take it out. */
747 if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
748 struct tg_export_data *ted;
750 ted = &obd->obd_self_export->exp_target_data;
751 osfs->os_bavail -= min_t(u64, osfs->os_bavail,
752 ted->ted_grant >> tgd->tgd_blockbits);
755 tgt_grant_sanity_check(obd, __func__);
756 CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; "
757 "%llu objects: %llu free; state %x\n",
758 osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
759 osfs->os_files, osfs->os_ffree, osfs->os_state);
761 if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
762 ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
763 /* Reduce free inode count to zero, but keep "used" intact */
764 osfs->os_files -= osfs->os_ffree;
765 osfs->os_ffree -= osfs->os_ffree;
768 /* OS_STATE_READONLY can be set by OSD already */
769 if (ofd->ofd_raid_degraded)
770 osfs->os_state |= OS_STATE_DEGRADED;
772 if (obd->obd_self_export != exp && !exp_grant_param_supp(exp) &&
773 tgd->tgd_blockbits > COMPAT_BSIZE_SHIFT) {
774 /* clients which don't support OBD_CONNECT_GRANT_PARAM
775 * should not see a block size > page size, otherwise
776 * cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
777 * block size which is the biggest block size known to work
778 * with all client's page size. */
779 osfs->os_blocks <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
780 osfs->os_bfree <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
781 osfs->os_bavail <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
782 osfs->os_bsize = 1 << COMPAT_BSIZE_SHIFT;
785 if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
786 ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
787 /* Reduce free blocks count near zero, but keep "used" intact */
788 osfs->os_bavail -= osfs->os_bavail - 2;
789 osfs->os_blocks -= osfs->os_bfree - 2;
790 osfs->os_bfree -= osfs->os_bfree - 2;
799 * Implementation of obd_ops::o_setattr.
801 * This function is only used by ECHO client when it is run on top of OFD,
802 * \see ofd_setattr_hdl() for request handler function.
804 * \param[in] env execution environment
805 * \param[in] exp OBD export of OFD device
806 * \param[in] oa setattr parameters
808 * \retval 0 if successful
809 * \retval negative value on error
811 static int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp,
814 struct ofd_thread_info *info;
815 struct ofd_device *ofd = ofd_exp(exp);
816 struct ldlm_namespace *ns = ofd->ofd_namespace;
817 struct ldlm_resource *res;
818 struct ofd_object *fo;
819 struct lu_fid *fid = &oa->o_oi.oi_fid;
824 info = ofd_info_init(env, exp);
826 ost_fid_build_resid(fid, &info->fti_resid);
828 /* This would be very bad - accidentally truncating a file when
829 * changing the time or similar - bug 12203. */
830 if (oa->o_valid & OBD_MD_FLSIZE) {
831 static char mdsinum[48];
833 if (oa->o_valid & OBD_MD_FLFID)
834 snprintf(mdsinum, sizeof(mdsinum) - 1,
835 "of parent "DFID, oa->o_parent_seq,
836 oa->o_parent_oid, 0);
840 CERROR("%s: setattr from %s trying to truncate object "DFID
841 " %s\n", ofd_name(ofd), obd_export_nid2str(exp),
843 GOTO(out, rc = -EPERM);
846 fo = ofd_object_find_exists(env, ofd, fid);
848 CERROR("%s: can't find object "DFID"\n",
849 ofd_name(ofd), PFID(fid));
850 GOTO(out, rc = PTR_ERR(fo));
853 la_from_obdo(&info->fti_attr, oa, oa->o_valid);
854 info->fti_attr.la_valid &= ~LA_TYPE;
856 /* setting objects attributes (including owner/group) */
857 rc = ofd_attr_set(env, fo, &info->fti_attr, oa);
859 GOTO(out_unlock, rc);
861 ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL, 1);
864 ofd_object_put(env, fo);
867 /* we do not call this before to avoid lu_object_find() in
868 * ->lvbo_update() holding another reference on the object.
869 * otherwise concurrent destroy can make the object unavailable
870 * for 2nd lu_object_find() waiting for the first reference
871 * to go... deadlock! */
872 res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
874 ldlm_res_lvbo_update(res, NULL, 0);
875 ldlm_resource_putref(res);
883 * Destroy OFD object by its FID.
885 * Supplemental function to destroy object by FID, it is used by request
886 * handler and by ofd_echo_destroy() below to find object by FID, lock it
887 * and call ofd_destroy() finally.
889 * \param[in] env execution environment
890 * \param[in] ofd OFD device
891 * \param[in] fid FID of object
892 * \param[in] orphan set if object being destroyed is an orphan
894 * \retval 0 if successful
895 * \retval negative value on error
897 int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd,
898 const struct lu_fid *fid, int orphan)
900 struct ofd_thread_info *info = ofd_info(env);
901 struct lustre_handle lockh;
902 union ldlm_policy_data policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
903 struct ofd_object *fo;
904 __u64 flags = LDLM_FL_AST_DISCARD_DATA;
909 fo = ofd_object_find_exists(env, ofd, fid);
913 /* Tell the clients that the object is gone now and that they should
914 * throw away any cached pages. */
915 ost_fid_build_resid(fid, &info->fti_resid);
916 rc = ldlm_cli_enqueue_local(ofd->ofd_namespace, &info->fti_resid,
917 LDLM_EXTENT, &policy, LCK_PW, &flags,
918 ldlm_blocking_ast, ldlm_completion_ast,
919 NULL, NULL, 0, LVB_T_NONE, NULL, &lockh);
921 /* We only care about the side-effects, just drop the lock. */
923 ldlm_lock_decref(&lockh, LCK_PW);
927 rc = ofd_destroy(env, fo, orphan);
930 ofd_object_put(env, fo);
935 * Implementation of obd_ops::o_destroy.
937 * This function is only used by ECHO client when it is run on top of OFD,
938 * \see ofd_destroy_hdl() for request handler function.
940 * \param[in] env execution environment
941 * \param[in] exp OBD export of OFD device
942 * \param[in] oa obdo structure with FID
944 * Note: this is OBD API method which is common API for server OBDs and
945 * client OBDs. Thus some parameters used in client OBDs may not be used
946 * on server OBDs and vice versa.
948 * \retval 0 if successful
949 * \retval negative value on error
951 static int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
954 struct ofd_device *ofd = ofd_exp(exp);
955 struct lu_fid *fid = &oa->o_oi.oi_fid;
960 ofd_info_init(env, exp);
962 rc = ofd_validate_seq(exp, ostid_seq(&oa->o_oi));
966 CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
968 rc = ofd_destroy_by_fid(env, ofd, fid, 0);
970 CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n",
971 ofd_name(ofd), PFID(fid));
973 } else if (rc != 0) {
974 CERROR("%s: error destroying object "DFID": %d\n",
975 ofd_name(ofd), PFID(fid), rc);
984 * Implementation of obd_ops::o_create.
986 * This function is only used by ECHO client when it is run on top of OFD
987 * and just creates an object.
988 * \see ofd_create_hdl() for request handler function.
990 * \param[in] env execution environment
991 * \param[in] exp OBD export of OFD device
992 * \param[in] oa obdo structure with FID sequence to use
994 * Note: this is OBD API method which is common API for server OBDs and
995 * client OBDs. Thus some parameters used in client OBDs may not be used
996 * on server OBDs and vice versa.
998 * \retval 0 if successful
999 * \retval negative value on error
1001 static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
1004 struct ofd_device *ofd = ofd_exp(exp);
1005 u64 seq = ostid_seq(&oa->o_oi);
1006 struct ofd_seq *oseq;
1015 ofd_info_init(env, exp);
1017 LASSERT(seq == FID_SEQ_ECHO);
1018 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1020 CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
1022 down_read(&ofd->ofd_lastid_rwsem);
1023 /* Currently, for safe, we do not distinguish which LAST_ID is broken,
1024 * we may do that in the future.
1025 * Return -ENOSPC until the LAST_ID rebuilt. */
1026 if (unlikely(ofd->ofd_lastid_rebuilding))
1027 GOTO(out_sem, rc = -ENOSPC);
1029 rc = ofd_validate_seq(exp, seq);
1033 oseq = ofd_seq_load(env, ofd, seq);
1035 CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n",
1036 ofd_name(ofd), seq, PTR_ERR(oseq));
1037 GOTO(out_sem, rc = -EINVAL);
1040 mutex_lock(&oseq->os_create_lock);
1041 granted = tgt_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
1045 CDEBUG(D_HA, "%s: failed to acquire grant space for "
1046 "precreate (%lld): rc = %d\n", ofd_name(ofd), diff, rc);
1051 next_id = ofd_seq_last_oid(oseq) + 1;
1052 count = ofd_precreate_batch(ofd, (int)diff);
1054 rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0);
1056 CERROR("%s: unable to precreate: rc = %d\n",
1059 rc = ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq));
1061 CERROR("%s: Bad %llu to set " DOSTID " : rc %d\n",
1063 (unsigned long long)ofd_seq_last_oid(oseq),
1064 POSTID(&oa->o_oi), rc);
1066 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
1069 tgt_grant_commit(ofd_obd(ofd)->obd_self_export, granted, rc);
1071 mutex_unlock(&oseq->os_create_lock);
1072 ofd_seq_put(env, oseq);
1075 up_read(&ofd->ofd_lastid_rwsem);
1080 * Implementation of obd_ops::o_getattr.
1082 * This function is only used by ECHO client when it is run on top of OFD
1083 * and returns attributes of object.
1084 * \see ofd_getattr_hdl() for request handler function.
1086 * \param[in] env execution environment
1087 * \param[in] exp OBD export of OFD device
1088 * \param[in,out] oa contains FID of object to get attributes from and
1089 * is used to return attributes back
1091 * \retval 0 if successful
1092 * \retval negative value on error
1094 static int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
1097 struct ofd_device *ofd = ofd_exp(exp);
1098 struct ofd_thread_info *info;
1099 struct lu_fid *fid = &oa->o_oi.oi_fid;
1100 struct ofd_object *fo;
1105 info = ofd_info_init(env, exp);
1107 fo = ofd_object_find_exists(env, ofd, fid);
1109 GOTO(out, rc = PTR_ERR(fo));
1111 LASSERT(fo != NULL);
1112 rc = ofd_attr_get(env, fo, &info->fti_attr);
1113 oa->o_valid = OBD_MD_FLID;
1117 obdo_from_la(oa, &info->fti_attr,
1118 OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
1120 /* Store object version in reply */
1121 curr_version = dt_version_get(env, ofd_object_child(fo));
1122 if ((__s64)curr_version != -EOPNOTSUPP) {
1123 oa->o_valid |= OBD_MD_FLDATAVERSION;
1124 oa->o_data_version = curr_version;
1128 ofd_object_put(env, fo);
1134 * Get object version for OBD_IOC_GET_OBJ_VERSION ioctl.
1136 * This is supplemental function for ofd_iocontrol() to return object
1137 * version for lctl tool.
1139 * \param[in] env execution environment
1140 * \param[in] ofd OFD device
1141 * \param[out] karg ioctl data
1143 * \retval 0 if successful
1144 * \retval negative value on error
1146 static int ofd_ioc_get_obj_version(const struct lu_env *env,
1147 struct ofd_device *ofd, void *karg)
1149 struct obd_ioctl_data *data = karg;
1151 struct ofd_object *fo;
1152 dt_obj_version_t version;
1157 if (data->ioc_inlbuf2 == NULL || data->ioc_inllen2 != sizeof(version))
1158 GOTO(out, rc = -EINVAL);
1160 if (data->ioc_inlbuf1 != NULL && data->ioc_inllen1 == sizeof(fid)) {
1161 fid = *(struct lu_fid *)data->ioc_inlbuf1;
1162 } else if (data->ioc_inlbuf3 != NULL &&
1163 data->ioc_inllen3 == sizeof(__u64) &&
1164 data->ioc_inlbuf4 != NULL &&
1165 data->ioc_inllen4 == sizeof(__u64)) {
1166 struct ost_id ostid;
1168 ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4);
1169 rc = ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3);
1172 rc = ostid_to_fid(&fid, &ostid,
1173 ofd->ofd_lut.lut_lsd.lsd_osd_index);
1177 GOTO(out, rc = -EINVAL);
1180 if (!fid_is_sane(&fid))
1181 GOTO(out, rc = -EINVAL);
1183 fo = ofd_object_find(env, ofd, &fid);
1185 GOTO(out, rc = PTR_ERR(fo));
1187 if (!ofd_object_exists(fo))
1188 GOTO(out_fo, rc = -ENOENT);
1190 if (lu_object_remote(&fo->ofo_obj.do_lu))
1191 GOTO(out_fo, rc = -EREMOTE);
1193 version = dt_version_get(env, ofd_object_child(fo));
1195 GOTO(out_fo, rc = -EIO);
1197 *(dt_obj_version_t *)data->ioc_inlbuf2 = version;
1201 ofd_object_put(env, fo);
1207 * Implementation of obd_ops::o_iocontrol.
1209 * This is OFD ioctl handling function which is primary interface for
1210 * Lustre tools like lfs, lctl and lfsck.
1212 * \param[in] cmd ioctl command
1213 * \param[in] exp OBD export of OFD
1214 * \param[in] len not used
1215 * \param[in,out] karg buffer with data
1216 * \param[in] uarg not used
1218 * \retval 0 if successful
1219 * \retval negative value on error
1221 static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1222 void *karg, void __user *uarg)
1225 struct ofd_device *ofd = ofd_exp(exp);
1226 struct obd_device *obd = ofd_obd(ofd);
1231 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
1232 rc = lu_env_init(&env, LCT_DT_THREAD);
1237 case OBD_IOC_ABORT_RECOVERY:
1238 CERROR("%s: aborting recovery\n", obd->obd_name);
1239 obd->obd_abort_recovery = 1;
1240 target_stop_recovery_thread(obd);
1243 CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
1244 rc = dt_sync(&env, ofd->ofd_osd);
1246 case OBD_IOC_SET_READONLY:
1247 rc = dt_sync(&env, ofd->ofd_osd);
1249 rc = dt_ro(&env, ofd->ofd_osd);
1251 case OBD_IOC_START_LFSCK: {
1252 struct obd_ioctl_data *data = karg;
1253 struct lfsck_start_param lsp;
1255 if (unlikely(data == NULL)) {
1260 lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
1261 lsp.lsp_index_valid = 0;
1262 rc = lfsck_start(&env, ofd->ofd_osd, &lsp);
1265 case OBD_IOC_STOP_LFSCK: {
1266 struct obd_ioctl_data *data = karg;
1267 struct lfsck_stop stop;
1269 stop.ls_status = LS_STOPPED;
1270 /* Old lfsck utils may pass NULL @stop. */
1271 if (data->ioc_inlbuf1 == NULL)
1275 ((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
1277 rc = lfsck_stop(&env, ofd->ofd_osd, &stop);
1280 case OBD_IOC_GET_OBJ_VERSION:
1281 rc = ofd_ioc_get_obj_version(&env, ofd, karg);
1284 CERROR("%s: not supported cmd = %#x\n", obd->obd_name, cmd);
1293 * Implementation of obd_ops::o_precleanup.
1295 * This function stops device activity before shutting it down. It is called
1296 * from a cleanup function upon forceful device cleanup. For OFD there are no
1297 * special actions, it just invokes target_recovery_cleanup().
1299 * \param[in] obd OBD device of OFD
1303 static int ofd_precleanup(struct obd_device *obd)
1306 target_cleanup_recovery(obd);
1311 * Implementation of obd_ops::o_ping.
1313 * This is OFD-specific part of OBD_PING request handling.
1314 * It controls Filter Modification Data (FMD) expiration each time PING is
1317 * \see ofd_fmd_expire() and ofd_fmd.c for details
1319 * \param[in] env execution environment
1320 * \param[in] exp OBD export of client
1324 static int ofd_ping(const struct lu_env *env, struct obd_export *exp)
1326 ofd_fmd_expire(exp);
1331 * Implementation of obd_ops::o_health_check.
1333 * This function checks the OFD device health - ability to respond on
1334 * incoming requests. There are two health_check methods:
1335 * - get statfs from the OSD. It checks just responsiveness of
1337 * - do write attempt on bottom device to check it is fully operational and
1338 * is not stuck. This is expensive method and requires special configuration
1339 * option --enable-health-write while building Lustre, it is turned off
1342 * \param[in] nul not used
1343 * \param[in] obd OBD device of OFD
1345 * \retval 0 if successful
1346 * \retval negative value in case of error
1348 static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
1350 struct ofd_device *ofd = ofd_dev(obd->obd_lu_dev);
1351 struct ofd_thread_info *info;
1353 #ifdef USE_HEALTH_CHECK_WRITE
1358 /* obd_proc_read_health pass NULL env, we need real one */
1359 rc = lu_env_init(&env, LCT_DT_THREAD);
1363 info = ofd_info_init(&env, NULL);
1364 rc = dt_statfs(&env, ofd->ofd_osd, &info->fti_u.osfs);
1368 if (info->fti_u.osfs.os_state & OS_STATE_READONLY)
1369 GOTO(out, rc = -EROFS);
1371 #ifdef USE_HEALTH_CHECK_WRITE
1372 OBD_ALLOC(info->fti_buf.lb_buf, PAGE_SIZE);
1373 if (info->fti_buf.lb_buf == NULL)
1374 GOTO(out, rc = -ENOMEM);
1376 info->fti_buf.lb_len = PAGE_SIZE;
1379 th = dt_trans_create(&env, ofd->ofd_osd);
1381 GOTO(out, rc = PTR_ERR(th));
1383 rc = dt_declare_record_write(&env, ofd->ofd_health_check_file,
1384 &info->fti_buf, info->fti_off, th);
1386 th->th_sync = 1; /* sync IO is needed */
1387 rc = dt_trans_start_local(&env, ofd->ofd_osd, th);
1389 rc = dt_record_write(&env, ofd->ofd_health_check_file,
1390 &info->fti_buf, &info->fti_off,
1393 dt_trans_stop(&env, ofd->ofd_osd, th);
1395 OBD_FREE(info->fti_buf.lb_buf, PAGE_SIZE);
1397 CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
1404 struct obd_ops ofd_obd_ops = {
1405 .o_owner = THIS_MODULE,
1406 .o_connect = ofd_obd_connect,
1407 .o_reconnect = ofd_obd_reconnect,
1408 .o_disconnect = ofd_obd_disconnect,
1409 .o_create = ofd_echo_create,
1410 .o_statfs = ofd_statfs,
1411 .o_setattr = ofd_echo_setattr,
1412 .o_preprw = ofd_preprw,
1413 .o_commitrw = ofd_commitrw,
1414 .o_destroy = ofd_echo_destroy,
1415 .o_init_export = ofd_init_export,
1416 .o_destroy_export = ofd_destroy_export,
1417 .o_postrecov = ofd_obd_postrecov,
1418 .o_getattr = ofd_echo_getattr,
1419 .o_iocontrol = ofd_iocontrol,
1420 .o_precleanup = ofd_precleanup,
1422 .o_health_check = ofd_health_check,
1423 .o_set_info_async = ofd_set_info_async,
1424 .o_get_info = ofd_get_info,