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 <lustre/lustre_idl.h>
47 #include "ofd_internal.h"
48 #include <obd_cksum.h>
49 #include <uapi/linux/lustre_ioctl.h>
50 #include <lustre_quota.h>
51 #include <lustre_lfsck.h>
52 #include <lustre_nodemap.h>
55 * Initialize OFD per-export statistics.
57 * This function sets up procfs entries for various OFD export counters. These
58 * counters are for per-client statistics tracked on the server.
60 * \param[in] ofd OFD device
61 * \param[in] exp OBD export
62 * \param[in] client_nid NID of client
64 * \retval 0 if successful
65 * \retval negative value on error
67 static int ofd_export_stats_init(struct ofd_device *ofd,
68 struct obd_export *exp,
69 lnet_nid_t *client_nid)
71 struct obd_device *obd = ofd_obd(ofd);
72 struct nid_stat *stats;
76 LASSERT(obd->obd_uses_nid_stats);
78 if (obd_uuid_equals(&exp->exp_client_uuid, &obd->obd_uuid))
79 /* Self-export gets no proc entry */
82 rc = lprocfs_exp_setup(exp, client_nid);
84 /* Mask error for already created /proc entries */
85 RETURN(rc == -EALREADY ? 0 : rc);
87 stats = exp->exp_nid_stats;
88 stats->nid_stats = lprocfs_alloc_stats(NUM_OBD_STATS +
90 LPROCFS_STATS_FLAG_NOPERCPU);
91 if (stats->nid_stats == NULL)
94 lprocfs_init_ops_stats(LPROC_OFD_STATS_LAST, stats->nid_stats);
96 ofd_stats_counter_init(stats->nid_stats);
98 rc = lprocfs_register_stats(stats->nid_proc, "stats", stats->nid_stats);
100 lprocfs_free_stats(&stats->nid_stats);
104 rc = lprocfs_nid_ldlm_stats_init(stats);
113 * Match client and OST server connection feature flags.
115 * Compute the compatibility flags for a connection request based on
116 * features mutually supported by client and server.
118 * The obd_export::exp_connect_data.ocd_connect_flags field in \a exp
119 * must not be updated here, otherwise a partially initialized value may
120 * be exposed. After the connection request is successfully processed,
121 * the top-level tgt_connect() request handler atomically updates the export
122 * connect flags from the obd_connect_data::ocd_connect_flags field of the
123 * reply. \see tgt_connect().
125 * Before 2.7.50 clients will send a struct obd_connect_data_v1 rather than a
126 * full struct obd_connect_data. So care must be taken when accessing fields
127 * that are not present in struct obd_connect_data_v1. See LU-16.
129 * \param[in] env execution environment
130 * \param[in] exp the obd_export associated with this
132 * \param[in] data stores data for this connect request
133 * \param[in] new_connection is this connection new or not
135 * \retval 0 if success
136 * \retval -EPROTO client and server feature requirements are
138 * \retval -EBADF OST index in connect request doesn't match
141 static int ofd_parse_connect_data(const struct lu_env *env,
142 struct obd_export *exp,
143 struct obd_connect_data *data,
146 struct ofd_device *ofd = ofd_exp(exp);
147 struct filter_export_data *fed = &exp->exp_filter_data;
152 CDEBUG(D_RPCTRACE, "%s: cli %s/%p ocd_connect_flags: %#llx"
153 " ocd_version: %x ocd_grant: %d ocd_index: %u"
155 exp->exp_obd->obd_name, exp->exp_client_uuid.uuid, exp,
156 data->ocd_connect_flags, data->ocd_version,
157 data->ocd_grant, data->ocd_index, data->ocd_group);
159 if (fed->fed_group != 0 && fed->fed_group != data->ocd_group) {
160 CWARN("!!! This export (nid %s) used object group %d "
161 "earlier; now it's trying to use group %d! This could "
162 "be a bug in the MDS. Please report to "
163 "https://jira.hpdd.intel.com/\n",
164 obd_export_nid2str(exp), fed->fed_group,
168 fed->fed_group = data->ocd_group;
170 data->ocd_connect_flags &= OST_CONNECT_SUPPORTED;
172 if (data->ocd_connect_flags & OBD_CONNECT_FLAGS2)
173 data->ocd_connect_flags2 &= OST_CONNECT_SUPPORTED2;
175 data->ocd_version = LUSTRE_VERSION_CODE;
177 /* Kindly make sure the SKIP_ORPHAN flag is from MDS. */
178 if (data->ocd_connect_flags & OBD_CONNECT_MDS)
179 CDEBUG(D_HA, "%s: Received MDS connection for group %u\n",
180 exp->exp_obd->obd_name, data->ocd_group);
181 else if (data->ocd_connect_flags & OBD_CONNECT_SKIP_ORPHAN)
184 /* Determine optimal brw size before calculating grant */
185 if (OBD_FAIL_CHECK(OBD_FAIL_OST_BRW_SIZE)) {
186 data->ocd_brw_size = 65536;
187 } else if (OCD_HAS_FLAG(data, BRW_SIZE)) {
188 if (data->ocd_brw_size > ofd->ofd_brw_size)
189 data->ocd_brw_size = ofd->ofd_brw_size;
190 if (data->ocd_brw_size == 0) {
191 CERROR("%s: cli %s/%p ocd_connect_flags: %#llx"
192 " ocd_version: %x ocd_grant: %d ocd_index: %u "
193 "ocd_brw_size is unexpectedly zero, "
194 "network data corruption?"
195 "Refusing connection of this client\n",
196 exp->exp_obd->obd_name,
197 exp->exp_client_uuid.uuid,
198 exp, data->ocd_connect_flags, data->ocd_version,
199 data->ocd_grant, data->ocd_index);
204 if (OCD_HAS_FLAG(data, GRANT_PARAM)) {
205 struct dt_device_param *ddp = &ofd->ofd_lut.lut_dt_conf;
207 /* client is reporting its page size, for future use */
208 exp->exp_target_data.ted_pagebits = data->ocd_grant_blkbits;
209 data->ocd_grant_blkbits = ofd->ofd_lut.lut_tgd.tgd_blockbits;
210 /* ddp_inodespace may not be power-of-two value, eg. for ldiskfs
211 * it's LDISKFS_DIR_REC_LEN(20) = 28. */
212 data->ocd_grant_inobits = fls(ddp->ddp_inodespace - 1);
213 /* ocd_grant_tax_kb is in 1K byte blocks */
214 data->ocd_grant_tax_kb = ddp->ddp_extent_tax >> 10;
215 data->ocd_grant_max_blks = ddp->ddp_max_extent_blks;
218 if (OCD_HAS_FLAG(data, GRANT)) {
219 /* Save connect_data we have so far because tgt_grant_connect()
220 * uses it to calculate grant. */
221 exp->exp_connect_data = *data;
222 tgt_grant_connect(env, exp, data, new_connection);
225 if (data->ocd_connect_flags & OBD_CONNECT_INDEX) {
226 struct lr_server_data *lsd = &ofd->ofd_lut.lut_lsd;
227 int index = lsd->lsd_osd_index;
229 if (index != data->ocd_index) {
230 LCONSOLE_ERROR_MSG(0x136, "Connection from %s to index"
231 " %u doesn't match actual OST index"
232 " %u in last_rcvd file, bad "
234 obd_export_nid2str(exp), index,
238 if (!(lsd->lsd_feature_compat & OBD_COMPAT_OST)) {
239 /* this will only happen on the first connect */
240 lsd->lsd_feature_compat |= OBD_COMPAT_OST;
241 /* sync is not needed here as tgt_client_new will
242 * set exp_need_sync flag */
243 tgt_server_data_update(env, &ofd->ofd_lut, 0);
247 if (data->ocd_connect_flags & OBD_CONNECT_CKSUM) {
248 __u32 cksum_types = data->ocd_cksum_types;
250 /* The client set in ocd_cksum_types the checksum types it
251 * supports. We have to mask off the algorithms that we don't
253 data->ocd_cksum_types &= ofd->ofd_cksum_types_supported;
255 if (unlikely(data->ocd_cksum_types == 0)) {
256 CERROR("%s: Connect with checksum support but no "
257 "ocd_cksum_types is set\n",
258 exp->exp_obd->obd_name);
262 CDEBUG(D_RPCTRACE, "%s: cli %s supports cksum type %x, return "
263 "%x\n", exp->exp_obd->obd_name, obd_export_nid2str(exp),
264 cksum_types, data->ocd_cksum_types);
266 /* This client does not support OBD_CONNECT_CKSUM.
267 * Report failure to negotiate checksum at connect */
268 CDEBUG(D_RPCTRACE, "%s: cli %s does not support "
269 "OBD_CONNECT_CKSUM\n",
270 exp->exp_obd->obd_name, obd_export_nid2str(exp));
273 if (data->ocd_connect_flags & OBD_CONNECT_MAXBYTES)
274 data->ocd_maxbytes = ofd->ofd_lut.lut_dt_conf.ddp_maxbytes;
276 if (OCD_HAS_FLAG(data, PINGLESS)) {
277 if (ptlrpc_pinger_suppress_pings()) {
278 spin_lock(&exp->exp_obd->obd_dev_lock);
279 list_del_init(&exp->exp_obd_chain_timed);
280 spin_unlock(&exp->exp_obd->obd_dev_lock);
282 data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
290 * Re-initialize export upon client reconnection.
292 * This function parses connection data from reconnect and resets
295 * \param[in] env execution environment
296 * \param[in] exp OBD export
297 * \param[in] obd OFD device
298 * \param[in] cluuid NID of client
299 * \param[in] data connection data from request
300 * \param[in] localdata client NID
302 * \retval 0 if successful
303 * \retval negative value on error
305 static int ofd_obd_reconnect(const struct lu_env *env, struct obd_export *exp,
306 struct obd_device *obd, struct obd_uuid *cluuid,
307 struct obd_connect_data *data,
310 struct ofd_device *ofd;
315 if (exp == NULL || obd == NULL || cluuid == NULL)
318 rc = nodemap_add_member(*(lnet_nid_t *)client_nid, exp);
319 if (rc != 0 && rc != -EEXIST)
322 ofd = ofd_dev(obd->obd_lu_dev);
324 rc = ofd_parse_connect_data(env, exp, data, false);
326 ofd_export_stats_init(ofd, exp, client_nid);
328 nodemap_del_member(exp);
334 * Initialize new client connection.
336 * This function handles new connection to the OFD. The new export is
337 * created (in context of class_connect()) and persistent client data is
338 * initialized on storage.
340 * \param[in] env execution environment
341 * \param[out] _exp stores pointer to new export
342 * \param[in] obd OFD device
343 * \param[in] cluuid client UUID
344 * \param[in] data connection data from request
345 * \param[in] localdata client NID
347 * \retval 0 if successful
348 * \retval negative value on error
350 static int ofd_obd_connect(const struct lu_env *env, struct obd_export **_exp,
351 struct obd_device *obd, struct obd_uuid *cluuid,
352 struct obd_connect_data *data, void *localdata)
354 struct obd_export *exp;
355 struct ofd_device *ofd;
356 struct lustre_handle conn = { 0 };
360 if (_exp == NULL || obd == NULL || cluuid == NULL)
363 ofd = ofd_dev(obd->obd_lu_dev);
365 rc = class_connect(&conn, obd, cluuid);
369 exp = class_conn2export(&conn);
370 LASSERT(exp != NULL);
372 if (localdata != NULL) {
373 rc = nodemap_add_member(*(lnet_nid_t *)localdata, exp);
374 if (rc != 0 && rc != -EEXIST)
377 CDEBUG(D_HA, "%s: cannot find nodemap for client %s: "
378 "nid is null\n", obd->obd_name, cluuid->uuid);
381 rc = ofd_parse_connect_data(env, exp, data, true);
385 if (obd->obd_replayable) {
386 struct tg_export_data *ted = &exp->exp_target_data;
388 memcpy(ted->ted_lcd->lcd_uuid, cluuid,
389 sizeof(ted->ted_lcd->lcd_uuid));
390 rc = tgt_client_new(env, exp);
393 ofd_export_stats_init(ofd, exp, localdata);
396 CDEBUG(D_HA, "%s: get connection from MDS %d\n", obd->obd_name,
397 data ? data->ocd_group : -1);
401 class_disconnect(exp);
402 nodemap_del_member(exp);
411 * Disconnect a connected client.
413 * This function terminates the client connection. The client export is
414 * disconnected (cleaned up) and client data on persistent storage is removed.
416 * \param[in] exp OBD export
418 * \retval 0 if successful
419 * \retval negative value on error
421 int ofd_obd_disconnect(struct obd_export *exp)
423 struct ofd_device *ofd = ofd_exp(exp);
430 class_export_get(exp);
432 if (!(exp->exp_flags & OBD_OPT_FORCE))
433 tgt_grant_sanity_check(ofd_obd(ofd), __func__);
435 rc = server_disconnect_export(exp);
437 tgt_grant_discard(exp);
439 if (exp->exp_obd->obd_replayable) {
440 rc = lu_env_init(&env, LCT_DT_THREAD);
444 tgt_client_del(&env, exp);
448 nodemap_del_member(exp);
449 class_export_put(exp);
454 * Implementation of obd_ops::o_init_export.
456 * This function is called from class_new_export() and initializes
457 * the OFD-specific data for new export.
459 * \param[in] exp OBD export
461 * \retval 0 if successful
462 * \retval negative value on error
464 static int ofd_init_export(struct obd_export *exp)
468 spin_lock_init(&exp->exp_filter_data.fed_lock);
469 INIT_LIST_HEAD(&exp->exp_filter_data.fed_mod_list);
470 atomic_set(&exp->exp_filter_data.fed_soft_sync_count, 0);
471 spin_lock(&exp->exp_lock);
472 exp->exp_connecting = 1;
473 spin_unlock(&exp->exp_lock);
475 /* self-export doesn't need client data and ldlm initialization */
476 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
477 &exp->exp_client_uuid)))
480 rc = tgt_client_alloc(exp);
482 ldlm_init_export(exp);
484 CERROR("%s: Can't initialize export: rc %d\n",
485 exp->exp_obd->obd_name, rc);
490 * Implementation of obd_ops::o_destroy_export.
492 * This function is called from class_export_destroy() to cleanup
493 * the OFD-specific data for export being destroyed.
495 * \param[in] exp OBD export
497 * \retval 0 if successful
498 * \retval negative value on error
500 static int ofd_destroy_export(struct obd_export *exp)
502 struct ofd_device *ofd = ofd_exp(exp);
504 if (exp->exp_target_data.ted_pending)
505 CERROR("%s: cli %s/%p has %lu pending on destroyed export"
506 "\n", exp->exp_obd->obd_name, exp->exp_client_uuid.uuid,
507 exp, exp->exp_target_data.ted_pending);
509 target_destroy_export(exp);
511 if (unlikely(obd_uuid_equals(&exp->exp_obd->obd_uuid,
512 &exp->exp_client_uuid)))
515 ldlm_destroy_export(exp);
516 tgt_client_free(exp);
518 ofd_fmd_cleanup(exp);
521 * discard grants once we're sure no more
522 * interaction with the client is possible
524 tgt_grant_discard(exp);
525 ofd_fmd_cleanup(exp);
527 if (exp_connect_flags(exp) & OBD_CONNECT_GRANT)
528 ofd->ofd_lut.lut_tgd.tgd_tot_granted_clients--;
530 if (!(exp->exp_flags & OBD_OPT_FORCE))
531 tgt_grant_sanity_check(exp->exp_obd, __func__);
533 LASSERT(list_empty(&exp->exp_filter_data.fed_mod_list));
538 * Notify all devices in server stack about recovery completion.
540 * This function calls ldo_recovery_complete() for all lower devices in the
541 * server stack so they will be prepared for normal operations.
543 * \param[in] env execution environment
544 * \param[in] ofd OFD device
546 * \retval 0 if successful
547 * \retval negative value on error
549 int ofd_postrecov(const struct lu_env *env, struct ofd_device *ofd)
551 struct lu_device *ldev = &ofd->ofd_dt_dev.dd_lu_dev;
554 CDEBUG(D_HA, "%s: recovery is over\n", ofd_name(ofd));
556 if (!ofd->ofd_skip_lfsck && !ofd->ofd_osd->dd_rdonly) {
557 struct lfsck_start_param lsp;
559 lsp.lsp_start = NULL;
560 lsp.lsp_index_valid = 0;
561 rc = lfsck_start(env, ofd->ofd_osd, &lsp);
562 if (rc != 0 && rc != -EALREADY)
563 CWARN("%s: auto trigger paused LFSCK failed: rc = %d\n",
567 return ldev->ld_ops->ldo_recovery_complete(env, ldev);
571 * Implementation of obd_ops::o_postrecov.
573 * This function is called from target_finish_recovery() upon recovery
576 * \param[in] obd OBD device of OFD
578 * \retval 0 if successful
579 * \retval negative value on error
581 static int ofd_obd_postrecov(struct obd_device *obd)
584 struct lu_device *ldev = obd->obd_lu_dev;
589 rc = lu_env_init(&env, LCT_DT_THREAD);
592 ofd_info_init(&env, obd->obd_self_export);
594 rc = ofd_postrecov(&env, ofd_dev(ldev));
601 * Implementation of obd_ops::o_set_info_async.
603 * This function is not called from request handler, it is only used by
604 * class_notify_sptlrpc_conf() locally by direct obd_set_info_async() call.
605 * \see ofd_set_info_hdl() for request handler function.
607 * \param[in] env execution environment
608 * \param[in] exp OBD export of OFD device
609 * \param[in] keylen length of \a key
610 * \param[in] key key name
611 * \param[in] vallen length of \a val
612 * \param[in] val the \a key value
613 * \param[in] set not used in OFD
615 * \retval 0 if successful
616 * \retval negative value on error
618 static int ofd_set_info_async(const struct lu_env *env, struct obd_export *exp,
619 __u32 keylen, void *key, __u32 vallen, void *val,
620 struct ptlrpc_request_set *set)
626 if (exp->exp_obd == NULL) {
627 CDEBUG(D_IOCTL, "invalid export %p\n", exp);
631 if (KEY_IS(KEY_SPTLRPC_CONF)) {
632 rc = tgt_adapt_sptlrpc_conf(class_exp2tgt(exp));
634 CERROR("%s: Unsupported key %s\n",
635 exp->exp_obd->obd_name, (char*)key);
642 * Implementation of obd_ops::o_get_info.
644 * This function is not called from request handler, it is only used by
645 * direct call from nrs_orr_range_fill_physical() in ptlrpc, see LU-3239.
647 * \see ofd_get_info_hdl() for request handler function.
649 * \param[in] env execution environment
650 * \param[in] exp OBD export of OFD device
651 * \param[in] keylen length of \a key
652 * \param[in] key key name
653 * \param[out] vallen length of key value
654 * \param[out] val the key value to return
656 * \retval 0 if successful
657 * \retval negative value on error
659 static int ofd_get_info(const struct lu_env *env, struct obd_export *exp,
660 __u32 keylen, void *key, __u32 *vallen, void *val)
662 struct ofd_thread_info *info;
663 struct ofd_device *ofd;
664 struct ll_fiemap_info_key *fm_key = key;
665 struct fiemap *fiemap = val;
670 if (exp->exp_obd == NULL) {
671 CDEBUG(D_IOCTL, "invalid client export %p\n", exp);
677 if (KEY_IS(KEY_FIEMAP)) {
678 info = ofd_info_init(env, exp);
680 rc = ostid_to_fid(&info->fti_fid, &fm_key->lfik_oa.o_oi,
681 ofd->ofd_lut.lut_lsd.lsd_osd_index);
685 rc = ofd_fiemap_get(env, ofd, &info->fti_fid, fiemap);
687 CERROR("%s: not supported key %s\n", ofd_name(ofd), (char*)key);
695 * Implementation of obd_ops::o_statfs.
697 * This function returns information about a storage file system.
698 * It is called from several places by using the OBD API as well as
699 * by direct call, e.g. from request handler.
701 * \see ofd_statfs_hdl() for request handler function.
703 * Report also the state of the OST to the caller in osfs->os_state
704 * (OS_STATE_READONLY, OS_STATE_DEGRADED).
706 * \param[in] env execution environment
707 * \param[in] exp OBD export of OFD device
708 * \param[out] osfs statistic data to return
709 * \param[in] max_age maximum age for cached data
710 * \param[in] flags not used in OFD
712 * \retval 0 if successful
713 * \retval negative value on error
715 int ofd_statfs(const struct lu_env *env, struct obd_export *exp,
716 struct obd_statfs *osfs, __u64 max_age, __u32 flags)
718 struct obd_device *obd = class_exp2obd(exp);
719 struct ofd_device *ofd = ofd_exp(exp);
720 struct tg_grants_data *tgd = &ofd->ofd_lut.lut_tgd;
725 rc = tgt_statfs_internal(env, &ofd->ofd_lut, osfs, max_age, NULL);
729 /* at least try to account for cached pages. its still racy and
730 * might be under-reporting if clients haven't announced their
731 * caches with brw recently */
733 CDEBUG(D_SUPER | D_CACHE, "blocks cached %llu granted %llu"
734 " pending %llu free %llu avail %llu\n",
735 tgd->tgd_tot_dirty, tgd->tgd_tot_granted,
736 tgd->tgd_tot_pending,
737 osfs->os_bfree << tgd->tgd_blockbits,
738 osfs->os_bavail << tgd->tgd_blockbits);
740 osfs->os_bavail -= min_t(u64, osfs->os_bavail,
741 ((tgd->tgd_tot_dirty + tgd->tgd_tot_pending +
742 osfs->os_bsize - 1) >> tgd->tgd_blockbits));
744 /* The QoS code on the MDS does not care about space reserved for
745 * precreate, so take it out. */
746 if (exp_connect_flags(exp) & OBD_CONNECT_MDS) {
747 struct tg_export_data *ted;
749 ted = &obd->obd_self_export->exp_target_data;
750 osfs->os_bavail -= min_t(u64, osfs->os_bavail,
751 ted->ted_grant >> tgd->tgd_blockbits);
754 tgt_grant_sanity_check(obd, __func__);
755 CDEBUG(D_CACHE, "%llu blocks: %llu free, %llu avail; "
756 "%llu objects: %llu free; state %x\n",
757 osfs->os_blocks, osfs->os_bfree, osfs->os_bavail,
758 osfs->os_files, osfs->os_ffree, osfs->os_state);
760 if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOINO,
761 ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
762 /* Reduce free inode count to zero, but keep "used" intact */
763 osfs->os_files -= osfs->os_ffree;
764 osfs->os_ffree -= osfs->os_ffree;
767 /* OS_STATE_READONLY can be set by OSD already */
768 if (ofd->ofd_raid_degraded)
769 osfs->os_state |= OS_STATE_DEGRADED;
771 if (obd->obd_self_export != exp && !exp_grant_param_supp(exp) &&
772 tgd->tgd_blockbits > COMPAT_BSIZE_SHIFT) {
773 /* clients which don't support OBD_CONNECT_GRANT_PARAM
774 * should not see a block size > page size, otherwise
775 * cl_lost_grant goes mad. Therefore, we emulate a 4KB (=2^12)
776 * block size which is the biggest block size known to work
777 * with all client's page size. */
778 osfs->os_blocks <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
779 osfs->os_bfree <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
780 osfs->os_bavail <<= tgd->tgd_blockbits - COMPAT_BSIZE_SHIFT;
781 osfs->os_bsize = 1 << COMPAT_BSIZE_SHIFT;
784 if (OBD_FAIL_CHECK_VALUE(OBD_FAIL_OST_ENOSPC,
785 ofd->ofd_lut.lut_lsd.lsd_osd_index)) {
786 /* Reduce free blocks count near zero, but keep "used" intact */
787 osfs->os_bavail -= osfs->os_bavail - 2;
788 osfs->os_blocks -= osfs->os_bfree - 2;
789 osfs->os_bfree -= osfs->os_bfree - 2;
798 * Implementation of obd_ops::o_setattr.
800 * This function is only used by ECHO client when it is run on top of OFD,
801 * \see ofd_setattr_hdl() for request handler function.
803 * \param[in] env execution environment
804 * \param[in] exp OBD export of OFD device
805 * \param[in] oa setattr parameters
807 * \retval 0 if successful
808 * \retval negative value on error
810 static int ofd_echo_setattr(const struct lu_env *env, struct obd_export *exp,
813 struct ofd_thread_info *info;
814 struct ofd_device *ofd = ofd_exp(exp);
815 struct ldlm_namespace *ns = ofd->ofd_namespace;
816 struct ldlm_resource *res;
817 struct ofd_object *fo;
818 struct lu_fid *fid = &oa->o_oi.oi_fid;
819 struct filter_fid *ff = NULL;
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 if (oa->o_valid & OBD_MD_FLFID) {
857 ff = &info->fti_mds_fid;
858 ofd_prepare_fidea(ff, oa);
861 /* setting objects attributes (including owner/group) */
862 rc = ofd_attr_set(env, fo, &info->fti_attr, ff);
864 GOTO(out_unlock, rc);
866 ofd_counter_incr(exp, LPROC_OFD_STATS_SETATTR, NULL, 1);
869 ofd_object_put(env, fo);
872 /* we do not call this before to avoid lu_object_find() in
873 * ->lvbo_update() holding another reference on the object.
874 * otherwise concurrent destroy can make the object unavailable
875 * for 2nd lu_object_find() waiting for the first reference
876 * to go... deadlock! */
877 res = ldlm_resource_get(ns, NULL, &info->fti_resid, LDLM_EXTENT, 0);
879 ldlm_res_lvbo_update(res, NULL, 0);
880 ldlm_resource_putref(res);
888 * Destroy OFD object by its FID.
890 * Supplemental function to destroy object by FID, it is used by request
891 * handler and by ofd_echo_destroy() below to find object by FID, lock it
892 * and call ofd_destroy() finally.
894 * \param[in] env execution environment
895 * \param[in] ofd OFD device
896 * \param[in] fid FID of object
897 * \param[in] orphan set if object being destroyed is an orphan
899 * \retval 0 if successful
900 * \retval negative value on error
902 int ofd_destroy_by_fid(const struct lu_env *env, struct ofd_device *ofd,
903 const struct lu_fid *fid, int orphan)
905 struct ofd_thread_info *info = ofd_info(env);
906 struct lustre_handle lockh;
907 union ldlm_policy_data policy = { .l_extent = { 0, OBD_OBJECT_EOF } };
908 struct ofd_object *fo;
909 __u64 flags = LDLM_FL_AST_DISCARD_DATA;
914 fo = ofd_object_find_exists(env, ofd, fid);
918 /* Tell the clients that the object is gone now and that they should
919 * throw away any cached pages. */
920 ost_fid_build_resid(fid, &info->fti_resid);
921 rc = ldlm_cli_enqueue_local(ofd->ofd_namespace, &info->fti_resid,
922 LDLM_EXTENT, &policy, LCK_PW, &flags,
923 ldlm_blocking_ast, ldlm_completion_ast,
924 NULL, NULL, 0, LVB_T_NONE, NULL, &lockh);
926 /* We only care about the side-effects, just drop the lock. */
928 ldlm_lock_decref(&lockh, LCK_PW);
932 rc = ofd_destroy(env, fo, orphan);
935 ofd_object_put(env, fo);
940 * Implementation of obd_ops::o_destroy.
942 * This function is only used by ECHO client when it is run on top of OFD,
943 * \see ofd_destroy_hdl() for request handler function.
945 * \param[in] env execution environment
946 * \param[in] exp OBD export of OFD device
947 * \param[in] oa obdo structure with FID
949 * Note: this is OBD API method which is common API for server OBDs and
950 * client OBDs. Thus some parameters used in client OBDs may not be used
951 * on server OBDs and vice versa.
953 * \retval 0 if successful
954 * \retval negative value on error
956 static int ofd_echo_destroy(const struct lu_env *env, struct obd_export *exp,
959 struct ofd_device *ofd = ofd_exp(exp);
960 struct lu_fid *fid = &oa->o_oi.oi_fid;
965 ofd_info_init(env, exp);
967 rc = ofd_validate_seq(exp, ostid_seq(&oa->o_oi));
971 CDEBUG(D_HA, "%s: Destroy object "DFID"\n", ofd_name(ofd), PFID(fid));
973 rc = ofd_destroy_by_fid(env, ofd, fid, 0);
975 CDEBUG(D_INODE, "%s: destroying non-existent object "DFID"\n",
976 ofd_name(ofd), PFID(fid));
978 } else if (rc != 0) {
979 CERROR("%s: error destroying object "DFID": %d\n",
980 ofd_name(ofd), PFID(fid), rc);
989 * Implementation of obd_ops::o_create.
991 * This function is only used by ECHO client when it is run on top of OFD
992 * and just creates an object.
993 * \see ofd_create_hdl() for request handler function.
995 * \param[in] env execution environment
996 * \param[in] exp OBD export of OFD device
997 * \param[in] oa obdo structure with FID sequence to use
999 * Note: this is OBD API method which is common API for server OBDs and
1000 * client OBDs. Thus some parameters used in client OBDs may not be used
1001 * on server OBDs and vice versa.
1003 * \retval 0 if successful
1004 * \retval negative value on error
1006 static int ofd_echo_create(const struct lu_env *env, struct obd_export *exp,
1009 struct ofd_device *ofd = ofd_exp(exp);
1010 u64 seq = ostid_seq(&oa->o_oi);
1011 struct ofd_seq *oseq;
1012 int rc = 0, diff = 1;
1019 ofd_info_init(env, exp);
1021 LASSERT(seq == FID_SEQ_ECHO);
1022 LASSERT(oa->o_valid & OBD_MD_FLGROUP);
1024 CDEBUG(D_INFO, "ofd_create("DOSTID")\n", POSTID(&oa->o_oi));
1026 down_read(&ofd->ofd_lastid_rwsem);
1027 /* Currently, for safe, we do not distinguish which LAST_ID is broken,
1028 * we may do that in the future.
1029 * Return -ENOSPC until the LAST_ID rebuilt. */
1030 if (unlikely(ofd->ofd_lastid_rebuilding))
1031 GOTO(out_sem, rc = -ENOSPC);
1033 rc = ofd_validate_seq(exp, seq);
1037 oseq = ofd_seq_load(env, ofd, seq);
1039 CERROR("%s: Can't find FID Sequence %#llx: rc = %ld\n",
1040 ofd_name(ofd), seq, PTR_ERR(oseq));
1041 GOTO(out_sem, rc = -EINVAL);
1044 mutex_lock(&oseq->os_create_lock);
1045 granted = tgt_grant_create(env, ofd_obd(ofd)->obd_self_export, &diff);
1049 CDEBUG(D_HA, "%s: failed to acquire grant space for "
1050 "precreate (%d): rc = %d\n", ofd_name(ofd), diff, rc);
1055 next_id = ofd_seq_last_oid(oseq) + 1;
1056 count = ofd_precreate_batch(ofd, diff);
1058 rc = ofd_precreate_objects(env, ofd, next_id, oseq, count, 0);
1060 CERROR("%s: unable to precreate: rc = %d\n",
1063 rc = ostid_set_id(&oa->o_oi, ofd_seq_last_oid(oseq));
1065 CERROR("%s: Bad %llu to set " DOSTID " : rc %d\n",
1067 (unsigned long long)ofd_seq_last_oid(oseq),
1068 POSTID(&oa->o_oi), rc);
1070 oa->o_valid |= OBD_MD_FLID | OBD_MD_FLGROUP;
1073 tgt_grant_commit(ofd_obd(ofd)->obd_self_export, granted, rc);
1075 mutex_unlock(&oseq->os_create_lock);
1076 ofd_seq_put(env, oseq);
1079 up_read(&ofd->ofd_lastid_rwsem);
1084 * Implementation of obd_ops::o_getattr.
1086 * This function is only used by ECHO client when it is run on top of OFD
1087 * and returns attributes of object.
1088 * \see ofd_getattr_hdl() for request handler function.
1090 * \param[in] env execution environment
1091 * \param[in] exp OBD export of OFD device
1092 * \param[in,out] oa contains FID of object to get attributes from and
1093 * is used to return attributes back
1095 * \retval 0 if successful
1096 * \retval negative value on error
1098 static int ofd_echo_getattr(const struct lu_env *env, struct obd_export *exp,
1101 struct ofd_device *ofd = ofd_exp(exp);
1102 struct ofd_thread_info *info;
1103 struct lu_fid *fid = &oa->o_oi.oi_fid;
1104 struct ofd_object *fo;
1109 info = ofd_info_init(env, exp);
1111 fo = ofd_object_find_exists(env, ofd, fid);
1113 GOTO(out, rc = PTR_ERR(fo));
1115 LASSERT(fo != NULL);
1116 rc = ofd_attr_get(env, fo, &info->fti_attr);
1117 oa->o_valid = OBD_MD_FLID;
1121 obdo_from_la(oa, &info->fti_attr,
1122 OFD_VALID_FLAGS | LA_UID | LA_GID | LA_PROJID);
1124 /* Store object version in reply */
1125 curr_version = dt_version_get(env, ofd_object_child(fo));
1126 if ((__s64)curr_version != -EOPNOTSUPP) {
1127 oa->o_valid |= OBD_MD_FLDATAVERSION;
1128 oa->o_data_version = curr_version;
1132 ofd_object_put(env, fo);
1138 * Get object version for OBD_IOC_GET_OBJ_VERSION ioctl.
1140 * This is supplemental function for ofd_iocontrol() to return object
1141 * version for lctl tool.
1143 * \param[in] env execution environment
1144 * \param[in] ofd OFD device
1145 * \param[out] karg ioctl data
1147 * \retval 0 if successful
1148 * \retval negative value on error
1150 static int ofd_ioc_get_obj_version(const struct lu_env *env,
1151 struct ofd_device *ofd, void *karg)
1153 struct obd_ioctl_data *data = karg;
1155 struct ofd_object *fo;
1156 dt_obj_version_t version;
1161 if (data->ioc_inlbuf2 == NULL || data->ioc_inllen2 != sizeof(version))
1162 GOTO(out, rc = -EINVAL);
1164 if (data->ioc_inlbuf1 != NULL && data->ioc_inllen1 == sizeof(fid)) {
1165 fid = *(struct lu_fid *)data->ioc_inlbuf1;
1166 } else if (data->ioc_inlbuf3 != NULL &&
1167 data->ioc_inllen3 == sizeof(__u64) &&
1168 data->ioc_inlbuf4 != NULL &&
1169 data->ioc_inllen4 == sizeof(__u64)) {
1170 struct ost_id ostid;
1172 ostid_set_seq(&ostid, *(__u64 *)data->ioc_inlbuf4);
1173 rc = ostid_set_id(&ostid, *(__u64 *)data->ioc_inlbuf3);
1176 rc = ostid_to_fid(&fid, &ostid,
1177 ofd->ofd_lut.lut_lsd.lsd_osd_index);
1181 GOTO(out, rc = -EINVAL);
1184 if (!fid_is_sane(&fid))
1185 GOTO(out, rc = -EINVAL);
1187 fo = ofd_object_find(env, ofd, &fid);
1189 GOTO(out, rc = PTR_ERR(fo));
1191 if (!ofd_object_exists(fo))
1192 GOTO(out_fo, rc = -ENOENT);
1194 if (lu_object_remote(&fo->ofo_obj.do_lu))
1195 GOTO(out_fo, rc = -EREMOTE);
1197 version = dt_version_get(env, ofd_object_child(fo));
1199 GOTO(out_fo, rc = -EIO);
1201 *(dt_obj_version_t *)data->ioc_inlbuf2 = version;
1205 ofd_object_put(env, fo);
1211 * Implementation of obd_ops::o_iocontrol.
1213 * This is OFD ioctl handling function which is primary interface for
1214 * Lustre tools like lfs, lctl and lfsck.
1216 * \param[in] cmd ioctl command
1217 * \param[in] exp OBD export of OFD
1218 * \param[in] len not used
1219 * \param[in,out] karg buffer with data
1220 * \param[in] uarg not used
1222 * \retval 0 if successful
1223 * \retval negative value on error
1225 static int ofd_iocontrol(unsigned int cmd, struct obd_export *exp, int len,
1226 void *karg, void __user *uarg)
1229 struct ofd_device *ofd = ofd_exp(exp);
1230 struct obd_device *obd = ofd_obd(ofd);
1235 CDEBUG(D_IOCTL, "handling ioctl cmd %#x\n", cmd);
1236 rc = lu_env_init(&env, LCT_DT_THREAD);
1241 case OBD_IOC_ABORT_RECOVERY:
1242 CERROR("%s: aborting recovery\n", obd->obd_name);
1243 obd->obd_abort_recovery = 1;
1244 target_stop_recovery_thread(obd);
1247 CDEBUG(D_RPCTRACE, "syncing ost %s\n", obd->obd_name);
1248 rc = dt_sync(&env, ofd->ofd_osd);
1250 case OBD_IOC_SET_READONLY:
1251 rc = dt_sync(&env, ofd->ofd_osd);
1253 rc = dt_ro(&env, ofd->ofd_osd);
1255 case OBD_IOC_START_LFSCK: {
1256 struct obd_ioctl_data *data = karg;
1257 struct lfsck_start_param lsp;
1259 if (unlikely(data == NULL)) {
1264 lsp.lsp_start = (struct lfsck_start *)(data->ioc_inlbuf1);
1265 lsp.lsp_index_valid = 0;
1266 rc = lfsck_start(&env, ofd->ofd_osd, &lsp);
1269 case OBD_IOC_STOP_LFSCK: {
1270 struct obd_ioctl_data *data = karg;
1271 struct lfsck_stop stop;
1273 stop.ls_status = LS_STOPPED;
1274 /* Old lfsck utils may pass NULL @stop. */
1275 if (data->ioc_inlbuf1 == NULL)
1279 ((struct lfsck_stop *)(data->ioc_inlbuf1))->ls_flags;
1281 rc = lfsck_stop(&env, ofd->ofd_osd, &stop);
1284 case OBD_IOC_GET_OBJ_VERSION:
1285 rc = ofd_ioc_get_obj_version(&env, ofd, karg);
1288 CERROR("%s: not supported cmd = %#x\n", obd->obd_name, cmd);
1297 * Implementation of obd_ops::o_precleanup.
1299 * This function stops device activity before shutting it down. It is called
1300 * from a cleanup function upon forceful device cleanup. For OFD there are no
1301 * special actions, it just invokes target_recovery_cleanup().
1303 * \param[in] obd OBD device of OFD
1307 static int ofd_precleanup(struct obd_device *obd)
1310 target_cleanup_recovery(obd);
1315 * Implementation of obd_ops::o_ping.
1317 * This is OFD-specific part of OBD_PING request handling.
1318 * It controls Filter Modification Data (FMD) expiration each time PING is
1321 * \see ofd_fmd_expire() and ofd_fmd.c for details
1323 * \param[in] env execution environment
1324 * \param[in] exp OBD export of client
1328 static int ofd_ping(const struct lu_env *env, struct obd_export *exp)
1330 ofd_fmd_expire(exp);
1335 * Implementation of obd_ops::o_health_check.
1337 * This function checks the OFD device health - ability to respond on
1338 * incoming requests. There are two health_check methods:
1339 * - get statfs from the OSD. It checks just responsiveness of
1341 * - do write attempt on bottom device to check it is fully operational and
1342 * is not stuck. This is expensive method and requires special configuration
1343 * option --enable-health-write while building Lustre, it is turned off
1346 * \param[in] nul not used
1347 * \param[in] obd OBD device of OFD
1349 * \retval 0 if successful
1350 * \retval negative value in case of error
1352 static int ofd_health_check(const struct lu_env *nul, struct obd_device *obd)
1354 struct ofd_device *ofd = ofd_dev(obd->obd_lu_dev);
1355 struct ofd_thread_info *info;
1357 #ifdef USE_HEALTH_CHECK_WRITE
1362 /* obd_proc_read_health pass NULL env, we need real one */
1363 rc = lu_env_init(&env, LCT_DT_THREAD);
1367 info = ofd_info_init(&env, NULL);
1368 rc = dt_statfs(&env, ofd->ofd_osd, &info->fti_u.osfs);
1372 if (info->fti_u.osfs.os_state & OS_STATE_READONLY)
1373 GOTO(out, rc = -EROFS);
1375 #ifdef USE_HEALTH_CHECK_WRITE
1376 OBD_ALLOC(info->fti_buf.lb_buf, PAGE_SIZE);
1377 if (info->fti_buf.lb_buf == NULL)
1378 GOTO(out, rc = -ENOMEM);
1380 info->fti_buf.lb_len = PAGE_SIZE;
1383 th = dt_trans_create(&env, ofd->ofd_osd);
1385 GOTO(out, rc = PTR_ERR(th));
1387 rc = dt_declare_record_write(&env, ofd->ofd_health_check_file,
1388 &info->fti_buf, info->fti_off, th);
1390 th->th_sync = 1; /* sync IO is needed */
1391 rc = dt_trans_start_local(&env, ofd->ofd_osd, th);
1393 rc = dt_record_write(&env, ofd->ofd_health_check_file,
1394 &info->fti_buf, &info->fti_off,
1397 dt_trans_stop(&env, ofd->ofd_osd, th);
1399 OBD_FREE(info->fti_buf.lb_buf, PAGE_SIZE);
1401 CDEBUG(D_INFO, "write 1 page synchronously for checking io rc %d\n",rc);
1408 struct obd_ops ofd_obd_ops = {
1409 .o_owner = THIS_MODULE,
1410 .o_connect = ofd_obd_connect,
1411 .o_reconnect = ofd_obd_reconnect,
1412 .o_disconnect = ofd_obd_disconnect,
1413 .o_create = ofd_echo_create,
1414 .o_statfs = ofd_statfs,
1415 .o_setattr = ofd_echo_setattr,
1416 .o_preprw = ofd_preprw,
1417 .o_commitrw = ofd_commitrw,
1418 .o_destroy = ofd_echo_destroy,
1419 .o_init_export = ofd_init_export,
1420 .o_destroy_export = ofd_destroy_export,
1421 .o_postrecov = ofd_obd_postrecov,
1422 .o_getattr = ofd_echo_getattr,
1423 .o_iocontrol = ofd_iocontrol,
1424 .o_precleanup = ofd_precleanup,
1426 .o_health_check = ofd_health_check,
1427 .o_set_info_async = ofd_set_info_async,
1428 .o_get_info = ofd_get_info,