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) 2013, 2017, Intel Corporation.
29 * This file is part of Lustre, http://www.lustre.org/
30 * Lustre is a trademark of Sun Microsystems, Inc.
32 * lustre/obdclass/obd_mount_server.c
34 * Server mount routines
36 * Author: Nathan Rutman <nathan@clusterfs.com>
40 #define DEBUG_SUBSYSTEM S_CLASS
41 #define D_MOUNT (D_SUPER | D_CONFIG /* | D_WARNING */)
42 #define PRINT_CMD CDEBUG
43 #define PRINT_MASK (D_SUPER | D_CONFIG)
45 #include <linux/types.h>
46 #ifdef HAVE_LINUX_SELINUX_IS_ENABLED
47 #include <linux/selinux.h>
49 #include <linux/statfs.h>
50 #include <linux/version.h>
51 #include <linux/delay.h>
53 #include <llog_swab.h>
54 #include <lustre_disk.h>
55 #include <uapi/linux/lustre/lustre_ioctl.h>
56 #include <lustre_log.h>
57 #include <uapi/linux/lustre/lustre_param.h>
59 #include <obd_class.h>
61 /*********** mount lookup *********/
63 static DEFINE_MUTEX(lustre_mount_info_lock);
64 static LIST_HEAD(server_mount_info_list);
66 static struct lustre_mount_info *server_find_mount(const char *name)
68 struct list_head *tmp;
69 struct lustre_mount_info *lmi;
72 list_for_each(tmp, &server_mount_info_list) {
73 lmi = list_entry(tmp, struct lustre_mount_info,
75 if (strcmp(name, lmi->lmi_name) == 0)
81 /* we must register an obd for a mount before we call the setup routine.
82 *_setup will call lustre_get_mount to get the mnt struct
83 by obd_name, since we can't pass the pointer to setup. */
84 static int server_register_mount(const char *name, struct super_block *sb)
86 struct lustre_mount_info *lmi;
92 OBD_ALLOC(lmi, sizeof(*lmi));
95 OBD_ALLOC(name_cp, strlen(name) + 1);
97 OBD_FREE(lmi, sizeof(*lmi));
100 strcpy(name_cp, name);
102 mutex_lock(&lustre_mount_info_lock);
104 if (server_find_mount(name)) {
105 mutex_unlock(&lustre_mount_info_lock);
106 OBD_FREE(lmi, sizeof(*lmi));
107 OBD_FREE(name_cp, strlen(name) + 1);
108 CERROR("Already registered %s\n", name);
111 lmi->lmi_name = name_cp;
113 list_add(&lmi->lmi_list_chain, &server_mount_info_list);
115 mutex_unlock(&lustre_mount_info_lock);
117 CDEBUG(D_MOUNT, "register mount %p from %s\n", sb, name);
122 /* when an obd no longer needs a mount */
123 static int server_deregister_mount(const char *name)
125 struct lustre_mount_info *lmi;
128 mutex_lock(&lustre_mount_info_lock);
129 lmi = server_find_mount(name);
131 mutex_unlock(&lustre_mount_info_lock);
132 CERROR("%s not registered\n", name);
136 CDEBUG(D_MOUNT, "deregister mount %p from %s\n", lmi->lmi_sb, name);
138 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
139 list_del(&lmi->lmi_list_chain);
140 OBD_FREE(lmi, sizeof(*lmi));
141 mutex_unlock(&lustre_mount_info_lock);
143 OBD_RACE(OBD_FAIL_MDS_LLOG_UMOUNT_RACE);
147 /* obd's look up a registered mount using their obdname. This is just
148 for initial obd setup to find the mount struct. It should not be
149 called every time you want to mntget. */
150 struct lustre_mount_info *server_get_mount(const char *name)
152 struct lustre_mount_info *lmi;
153 struct lustre_sb_info *lsi;
156 mutex_lock(&lustre_mount_info_lock);
157 lmi = server_find_mount(name);
158 mutex_unlock(&lustre_mount_info_lock);
160 CERROR("Can't find mount for %s\n", name);
163 lsi = s2lsi(lmi->lmi_sb);
165 atomic_inc(&lsi->lsi_mounts);
167 CDEBUG(D_MOUNT, "get mount %p from %s, refs=%d\n", lmi->lmi_sb,
168 name, atomic_read(&lsi->lsi_mounts));
172 EXPORT_SYMBOL(server_get_mount);
175 * server_put_mount: to be called from obd_cleanup methods
177 * @dereg_mnt: 0 or 1 depending on whether the mount is to be deregistered or
180 * The caller decides whether server_deregister_mount() needs to be called or
181 * not. Calling of server_deregister_mount() does not depend on refcounting on
182 * lsi because we could have say the mgs and mds on the same node and we
183 * unmount the mds, then the ref on the lsi would still be non-zero but we
184 * would still want to deregister the mds mount.
186 int server_put_mount(const char *name, bool dereg_mnt)
188 struct lustre_mount_info *lmi;
189 struct lustre_sb_info *lsi;
192 mutex_lock(&lustre_mount_info_lock);
193 lmi = server_find_mount(name);
194 mutex_unlock(&lustre_mount_info_lock);
196 CERROR("Can't find mount for %s\n", name);
199 lsi = s2lsi(lmi->lmi_sb);
201 CDEBUG(D_MOUNT, "put mount %p from %s, refs=%d\n",
202 lmi->lmi_sb, name, atomic_read(&lsi->lsi_mounts));
204 if (lustre_put_lsi(lmi->lmi_sb))
205 CDEBUG(D_MOUNT, "Last put of mount %p from %s\n",
209 /* this obd should never need the mount again */
210 server_deregister_mount(name);
214 EXPORT_SYMBOL(server_put_mount);
216 /* Set up a MGS to serve startup logs */
217 static int server_start_mgs(struct super_block *sb)
219 struct lustre_sb_info *lsi = s2lsi(sb);
220 struct lustre_mount_info *lmi;
224 /* It is impossible to have more than 1 MGS per node, since
225 MGC wouldn't know which to connect to */
226 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
228 lsi = s2lsi(lmi->lmi_sb);
229 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
234 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
236 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb);
239 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
240 LUSTRE_MGS_OBDNAME, NULL, NULL,
241 lsi->lsi_osd_obdname, NULL);
242 /* server_deregister_mount() is not called previously, for lsi
243 * and other stuff can't be freed cleanly when mgs calls
244 * server_put_mount() in error handling case (see b=17758),
245 * this problem is caused by a bug in mgs_init0, which forgot
246 * calling server_put_mount in error case. */
249 server_deregister_mount(LUSTRE_MGS_OBDNAME);
253 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
254 "Is the 'mgs' module loaded?\n",
255 LUSTRE_MGS_OBDNAME, rc);
259 static int server_stop_mgs(struct super_block *sb)
261 struct obd_device *obd;
263 struct lustre_mount_info *lmi;
266 /* Do not stop MGS if this device is not the running MGT */
267 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
268 if (lmi != NULL && lmi->lmi_sb != sb)
271 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
273 /* There better be only one MGS */
274 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
276 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
280 /* The MGS should always stop when we say so */
282 rc = class_manual_cleanup(obd);
286 /* Since there's only one mgc per node, we have to change it's fs to get
287 access to the right disk. */
288 static int server_mgc_set_fs(const struct lu_env *env,
289 struct obd_device *mgc, struct super_block *sb)
291 struct lustre_sb_info *lsi = s2lsi(sb);
295 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
297 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
298 rc = obd_set_info_async(env, mgc->obd_self_export,
299 sizeof(KEY_SET_FS), KEY_SET_FS,
300 sizeof(*sb), sb, NULL);
302 CERROR("can't set_fs %d\n", rc);
307 static int server_mgc_clear_fs(const struct lu_env *env,
308 struct obd_device *mgc)
313 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
315 rc = obd_set_info_async(env, mgc->obd_self_export,
316 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
321 static inline bool is_mdc_device(const char *devname)
325 ptr = strrchr(devname, '-');
326 return ptr != NULL && strcmp(ptr, "-mdc") == 0;
329 static inline bool tgt_is_mdt(const char *tgtname, __u32 *idx)
333 type = server_name2index(tgtname, idx, NULL);
335 return type == LDD_F_SV_TYPE_MDT;
339 * Convert OST/MDT name(fsname-{MDT,OST}xxxx) to a lwp name with the @idx:yyyy
340 * (fsname-MDTyyyy-lwp-{MDT,OST}xxxx)
342 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx)
349 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
353 rc = server_name2fsname(tgt_name, fsname, &tgt);
355 CERROR("%s: failed to get fsname from tgt_name: rc = %d\n",
360 if (*tgt != '-' && *tgt != ':') {
361 CERROR("%s: invalid tgt_name name!\n", tgt_name);
362 GOTO(cleanup, rc = -EINVAL);
366 if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
367 CERROR("%s is not an OST or MDT target!\n", tgt_name);
368 GOTO(cleanup, rc = -EINVAL);
370 snprintf(lwp_name, len, "%s-MDT%04x-%s-%s",
371 fsname, idx, LUSTRE_LWP_NAME, tgt);
373 GOTO(cleanup, rc = 0);
377 OBD_FREE(fsname, MTI_NAME_MAXLEN);
381 EXPORT_SYMBOL(tgt_name2lwp_name);
383 static LIST_HEAD(lwp_register_list);
384 static DEFINE_SPINLOCK(lwp_register_list_lock);
386 static void lustre_put_lwp_item(struct lwp_register_item *lri)
388 if (atomic_dec_and_test(&lri->lri_ref)) {
389 LASSERT(list_empty(&lri->lri_list));
391 if (*lri->lri_exp != NULL)
392 class_export_put(*lri->lri_exp);
397 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
398 register_lwp_cb cb_func, void *cb_data)
400 struct obd_device *lwp;
401 struct lwp_register_item *lri;
405 LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n",
407 LASSERT(exp != NULL && *exp == NULL);
413 lwp = class_name2obd(lwpname);
414 if (lwp != NULL && lwp->obd_set_up == 1) {
415 struct obd_uuid *uuid;
422 memcpy(uuid->uuid, lwpname, strlen(lwpname));
423 *exp = obd_uuid_lookup(lwp, uuid);
427 memcpy(lri->lri_name, lwpname, strlen(lwpname));
429 lri->lri_cb_func = cb_func;
430 lri->lri_cb_data = cb_data;
431 INIT_LIST_HEAD(&lri->lri_list);
433 * Initialize the lri_ref at 2, one will be released before
434 * current function returned via lustre_put_lwp_item(), the
435 * other will be released in lustre_deregister_lwp_item().
437 atomic_set(&lri->lri_ref, 2);
439 spin_lock(&lwp_register_list_lock);
440 list_add(&lri->lri_list, &lwp_register_list);
443 spin_unlock(&lwp_register_list_lock);
445 if (cb && cb_func != NULL)
447 lustre_put_lwp_item(lri);
451 EXPORT_SYMBOL(lustre_register_lwp_item);
453 void lustre_deregister_lwp_item(struct obd_export **exp)
455 struct lwp_register_item *lri;
456 bool removed = false;
459 spin_lock(&lwp_register_list_lock);
460 list_for_each_entry(lri, &lwp_register_list, lri_list) {
461 if (exp == lri->lri_exp) {
462 list_del_init(&lri->lri_list);
467 spin_unlock(&lwp_register_list_lock);
472 /* See lustre_notify_lwp_list(), in some extreme race conditions,
473 * the notify callback could be still on the fly, we need to wait
474 * for the callback done before moving on to free the data used
476 while (atomic_read(&lri->lri_ref) > 1) {
477 CDEBUG(D_MOUNT, "lri reference count %u, repeat: %d\n",
478 atomic_read(&lri->lri_ref), repeat);
480 schedule_timeout_interruptible(cfs_time_seconds(1));
482 lustre_put_lwp_item(lri);
484 EXPORT_SYMBOL(lustre_deregister_lwp_item);
486 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx)
488 struct lustre_mount_info *lmi;
489 struct lustre_sb_info *lsi;
490 struct obd_device *lwp;
491 struct obd_export *exp = NULL;
496 lmi = server_get_mount(dev);
500 lsi = s2lsi(lmi->lmi_sb);
501 rc = server_name2fsname(lsi->lsi_svname, fsname, NULL);
503 CERROR("%s: failed to get fsname: rc = %d\n",
504 lsi->lsi_svname, rc);
508 snprintf(lwp_name, sizeof(lwp_name), "%s-MDT%04x", fsname, idx);
509 mutex_lock(&lsi->lsi_lwp_mutex);
510 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
511 char *ptr = strstr(lwp->obd_name, lwp_name);
513 if (ptr != NULL && lwp->obd_lwp_export != NULL) {
514 exp = class_export_get(lwp->obd_lwp_export);
518 mutex_unlock(&lsi->lsi_lwp_mutex);
521 server_put_mount(dev, false);
525 EXPORT_SYMBOL(lustre_find_lwp_by_index);
527 void lustre_notify_lwp_list(struct obd_export *exp)
529 struct lwp_register_item *lri;
530 LASSERT(exp != NULL);
533 spin_lock(&lwp_register_list_lock);
534 list_for_each_entry(lri, &lwp_register_list, lri_list) {
535 if (strcmp(exp->exp_obd->obd_name, lri->lri_name))
537 if (*lri->lri_exp != NULL)
539 *lri->lri_exp = class_export_get(exp);
540 if (lri->lri_cb_func == NULL)
542 atomic_inc(&lri->lri_ref);
543 spin_unlock(&lwp_register_list_lock);
545 lri->lri_cb_func(lri->lri_cb_data);
546 lustre_put_lwp_item(lri);
548 /* Others may have changed the list after we unlock, we have
549 * to rescan the list from the beginning. Usually, the list
550 * 'lwp_register_list' is very short, and there is 'guard'
551 * lri::lri_exp that will prevent the callback to be done
552 * repeatedly. So rescanning the list has no problem. */
555 spin_unlock(&lwp_register_list_lock);
557 EXPORT_SYMBOL(lustre_notify_lwp_list);
559 static int lustre_lwp_connect(struct obd_device *lwp, bool is_mdt)
562 struct lu_context session_ctx;
563 struct obd_export *exp;
564 struct obd_uuid *uuid = NULL;
565 struct obd_connect_data *data = NULL;
569 /* log has been fully processed, let clients connect */
570 rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags);
574 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
575 session_ctx.lc_thread = NULL;
576 lu_context_enter(&session_ctx);
577 env.le_ses = &session_ctx;
581 GOTO(out, rc = -ENOMEM);
583 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
584 data->ocd_version = LUSTRE_VERSION_CODE;
585 data->ocd_connect_flags |= OBD_CONNECT_FID | OBD_CONNECT_AT |
586 OBD_CONNECT_LRU_RESIZE | OBD_CONNECT_FULL20 |
587 OBD_CONNECT_LVB_TYPE | OBD_CONNECT_LIGHTWEIGHT |
588 OBD_CONNECT_LFSCK | OBD_CONNECT_BULK_MBITS;
591 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS;
595 GOTO(out, rc = -ENOMEM);
597 if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) {
598 CERROR("%s: Too long lwp name %s, max_size is %d\n",
599 lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid));
600 GOTO(out, rc = -EINVAL);
603 /* Use lwp name as the uuid, so we find the export by lwp name later */
604 memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name));
605 rc = obd_connect(&env, &exp, lwp, uuid, data, NULL);
607 CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc);
609 if (unlikely(lwp->obd_lwp_export != NULL))
610 class_export_put(lwp->obd_lwp_export);
611 lwp->obd_lwp_export = class_export_get(exp);
623 lu_context_exit(&session_ctx);
624 lu_context_fini(&session_ctx);
630 * lwp is used by slaves (Non-MDT0 targets) to manage the connection to MDT0,
631 * or from the OSTx to MDTy.
633 static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi,
636 struct obd_device *obd;
637 char *lwpname = NULL;
638 char *lwpuuid = NULL;
642 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
645 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
649 OBD_ALLOC(lwpname, MTI_NAME_MAXLEN);
651 GOTO(out, rc = -ENOMEM);
653 rc = tgt_name2lwp_name(lsi->lsi_svname, lwpname, MTI_NAME_MAXLEN, idx);
655 CERROR("%s: failed to generate lwp name: rc = %d\n",
656 lsi->lsi_svname, rc);
660 OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN);
662 GOTO(out, rc = -ENOMEM);
664 sprintf(lwpuuid, "%s_UUID", lwpname);
665 rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME,
666 lwpuuid, lustre_cfg_string(lcfg, 1),
669 CERROR("%s: setup up failed: rc %d\n", lwpname, rc);
673 obd = class_name2obd(lwpname);
674 LASSERT(obd != NULL);
676 rc = lustre_lwp_connect(obd, strstr(lsi->lsi_svname, "-MDT") != NULL);
678 obd->u.cli.cl_max_mds_easize = MAX_MD_SIZE;
679 mutex_lock(&lsi->lsi_lwp_mutex);
680 list_add_tail(&obd->obd_lwp_list, &lsi->lsi_lwp_list);
681 mutex_unlock(&lsi->lsi_lwp_mutex);
683 CERROR("%s: connect failed: rc = %d\n", lwpname, rc);
690 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
692 OBD_FREE(lwpuuid, MTI_NAME_MAXLEN);
697 /* the caller is responsible for memory free */
698 static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi,
699 char **lwpname, __u32 idx)
701 struct obd_device *lwp;
705 LASSERT(lwpname != NULL);
706 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
708 OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN);
709 if (*lwpname == NULL)
710 RETURN(ERR_PTR(-ENOMEM));
712 rc = tgt_name2lwp_name(lsi->lsi_svname, *lwpname, MTI_NAME_MAXLEN, idx);
714 CERROR("%s: failed to generate lwp name: rc = %d\n",
715 lsi->lsi_svname, rc);
716 GOTO(out, rc = -EINVAL);
719 lwp = class_name2obd(*lwpname);
723 if (*lwpname != NULL) {
724 OBD_FREE(*lwpname, MTI_NAME_MAXLEN);
730 RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT));
733 static int lustre_lwp_add_conn(struct lustre_cfg *cfg,
734 struct lustre_sb_info *lsi, __u32 idx)
736 struct lustre_cfg_bufs *bufs = NULL;
737 struct lustre_cfg *lcfg = NULL;
738 char *lwpname = NULL;
739 struct obd_device *lwp;
743 lwp = lustre_find_lwp(lsi, &lwpname, idx);
745 CERROR("%s: can't find lwp device.\n", lsi->lsi_svname);
746 GOTO(out, rc = PTR_ERR(lwp));
748 LASSERT(lwpname != NULL);
752 GOTO(out, rc = -ENOMEM);
754 lustre_cfg_bufs_reset(bufs, lwpname);
755 lustre_cfg_bufs_set_string(bufs, 1,
756 lustre_cfg_string(cfg, 1));
758 OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen));
760 GOTO(out_cfg, rc = -ENOMEM);
761 lustre_cfg_init(lcfg, LCFG_ADD_CONN, bufs);
763 rc = class_add_conn(lwp, lcfg);
765 CERROR("%s: can't add conn: rc = %d\n", lwpname, rc);
768 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount,
769 lcfg->lcfg_buflens));
775 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
780 * Retrieve MDT nids from the client log, then start the lwp device.
781 * there are only two scenarios which would include mdt nid.
783 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxx-
784 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
785 * attach 0:lustre-MDTyyyy-mdc 1:mdc 2:lustre-clilmv_UUID
786 * setup 0:lustre-MDTyyyy-mdc 1:lustre-MDTyyyy_UUID 2:192.168.122.162@tcp
787 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
788 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.172.1@tcp
789 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDTyyyy_UUID xxxx
790 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxxx-
792 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
793 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
794 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.122.2@tcp
795 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
797 static int client_lwp_config_process(const struct lu_env *env,
798 struct llog_handle *handle,
799 struct llog_rec_hdr *rec, void *data)
801 struct config_llog_instance *cfg = data;
802 int cfg_len = rec->lrh_len;
803 char *cfg_buf = (char *) (rec + 1);
804 struct lustre_cfg *lcfg = NULL;
805 struct lustre_sb_info *lsi;
806 int rc = 0, swab = 0;
809 if (rec->lrh_type != OBD_CFG_REC) {
810 CERROR("Unknown llog record type %#x encountered\n",
815 if (cfg->cfg_sb == NULL)
816 GOTO(out, rc = -EINVAL);
817 lsi = s2lsi(cfg->cfg_sb);
819 lcfg = (struct lustre_cfg *)cfg_buf;
820 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
821 lustre_swab_lustre_cfg(lcfg);
825 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
829 switch (lcfg->lcfg_command) {
831 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
833 lustre_swab_cfg_marker(marker, swab,
834 LUSTRE_CFG_BUFLEN(lcfg, 1));
835 if (marker->cm_flags & CM_SKIP ||
836 marker->cm_flags & CM_EXCLUDE)
839 if (!tgt_is_mdt(marker->cm_tgtname, &cfg->cfg_lwp_idx))
842 if (IS_MDT(lsi) && cfg->cfg_lwp_idx != 0)
845 if (!strncmp(marker->cm_comment, "add mdc", 7) ||
846 !strncmp(marker->cm_comment, "add failnid", 11)) {
847 if (marker->cm_flags & CM_START) {
848 cfg->cfg_flags = CFG_F_MARKER;
849 /* This hack is to differentiate the
850 * ADD_UUID is come from "add mdc" record
851 * or from "add failnid" record. */
852 if (!strncmp(marker->cm_comment,
854 cfg->cfg_flags |= CFG_F_SKIP;
855 } else if (marker->cm_flags & CM_END) {
861 case LCFG_ADD_UUID: {
862 if (cfg->cfg_flags == CFG_F_MARKER) {
863 rc = lustre_lwp_setup(lcfg, lsi, cfg->cfg_lwp_idx);
864 /* XXX: process only the first nid as
865 * we don't need another instance of lwp */
866 cfg->cfg_flags |= CFG_F_SKIP;
867 } else if (cfg->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
868 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
871 CERROR("%s: Fail to add uuid, rc:%d\n",
872 lsi->lsi_svname, rc);
876 case LCFG_ADD_CONN: {
877 char *devname = lustre_cfg_string(lcfg, 0);
881 if (!is_mdc_device(devname))
884 if (!(cfg->cfg_flags & CFG_F_MARKER)) {
885 CDEBUG(D_CONFIG, "Skipping add_conn for %s, rec %d\n",
886 devname, rec->lrh_index);
890 /* add_conn should follow by add_uuid. This
891 * guarantee lwp device was created
893 if (!(cfg->cfg_flags & CFG_F_SKIP)) {
894 CWARN("Error at config for %s rec %d, add_conn should follow by add_uuid\n",
895 devname, rec->lrh_index);
898 ptr = strrchr(devname, '-');
903 if (!tgt_is_mdt(devname, &idx)) {
909 if (IS_MDT(lsi) && idx != 0)
912 rc = lustre_lwp_add_conn(lcfg, lsi, idx);
922 static int lustre_disconnect_lwp(struct super_block *sb)
924 struct lustre_sb_info *lsi = s2lsi(sb);
925 struct obd_device *lwp;
926 char *logname = NULL;
927 struct lustre_cfg_bufs *bufs = NULL;
928 struct config_llog_instance *cfg = NULL;
933 if (likely(lsi->lsi_lwp_started)) {
934 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
938 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
940 CERROR("%s: failed to get fsname from svname: "
941 "rc = %d\n", lsi->lsi_svname, rc);
942 GOTO(out, rc = -EINVAL);
945 strcat(logname, "-client");
948 GOTO(out, rc = -ENOMEM);
951 cfg->cfg_instance = ll_get_cfg_instance(sb);
952 rc = lustre_end_log(sb, logname, cfg);
953 if (rc != 0 && rc != -ENOENT)
956 lsi->lsi_lwp_started = 0;
961 GOTO(out, rc = -ENOMEM);
963 mutex_lock(&lsi->lsi_lwp_mutex);
964 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
965 struct lustre_cfg *lcfg;
967 if (likely(lwp->obd_lwp_export != NULL)) {
968 class_export_put(lwp->obd_lwp_export);
969 lwp->obd_lwp_export = NULL;
972 lustre_cfg_bufs_reset(bufs, lwp->obd_name);
973 lustre_cfg_bufs_set_string(bufs, 1, NULL);
974 OBD_ALLOC(lcfg, lustre_cfg_len(bufs->lcfg_bufcount,
980 lustre_cfg_init(lcfg, LCFG_CLEANUP, bufs);
982 /* Disconnect import first. NULL is passed for the '@env',
983 * since it will not be used. */
984 rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL,
985 lwp->obd_lu_dev, lcfg);
986 OBD_FREE(lcfg, lustre_cfg_len(lcfg->lcfg_bufcount,
987 lcfg->lcfg_buflens));
988 if (rc != 0 && rc != -ETIMEDOUT) {
989 CERROR("%s: fail to disconnect LWP: rc = %d\n",
994 mutex_unlock(&lsi->lsi_lwp_mutex);
1003 if (logname != NULL)
1004 OBD_FREE(logname, MTI_NAME_MAXLEN);
1006 return rc1 != 0 ? rc1 : rc;
1010 * Stop the lwp for an OST/MDT target.
1012 static int lustre_stop_lwp(struct super_block *sb)
1014 struct lustre_sb_info *lsi = s2lsi(sb);
1015 struct obd_device *lwp;
1020 mutex_lock(&lsi->lsi_lwp_mutex);
1021 while (!list_empty(&lsi->lsi_lwp_list)) {
1022 lwp = list_entry(lsi->lsi_lwp_list.next, struct obd_device,
1024 list_del_init(&lwp->obd_lwp_list);
1026 mutex_unlock(&lsi->lsi_lwp_mutex);
1028 rc = class_manual_cleanup(lwp);
1030 CERROR("%s: fail to stop LWP: rc = %d\n",
1034 mutex_lock(&lsi->lsi_lwp_mutex);
1036 mutex_unlock(&lsi->lsi_lwp_mutex);
1038 RETURN(rc1 != 0 ? rc1 : rc);
1042 * Start the lwp(fsname-MDTyyyy-lwp-{MDT,OST}xxxx) for a MDT/OST or MDT target.
1044 static int lustre_start_lwp(struct super_block *sb)
1046 struct lustre_sb_info *lsi = s2lsi(sb);
1047 struct config_llog_instance *cfg = NULL;
1052 if (unlikely(lsi->lsi_lwp_started))
1055 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1056 if (logname == NULL)
1059 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
1061 CERROR("%s: failed to get fsname from svname: rc = %d\n",
1062 lsi->lsi_svname, rc);
1063 GOTO(out, rc = -EINVAL);
1066 strcat(logname, "-client");
1069 GOTO(out, rc = -ENOMEM);
1071 cfg->cfg_callback = client_lwp_config_process;
1072 cfg->cfg_instance = ll_get_cfg_instance(sb);
1073 rc = lustre_process_log(sb, logname, cfg);
1074 /* need to remove config llog from mgc */
1075 lsi->lsi_lwp_started = 1;
1080 OBD_FREE(logname, MTI_NAME_MAXLEN);
1087 static DEFINE_MUTEX(server_start_lock);
1089 /* Stop MDS/OSS if nobody is using them */
1090 static int server_stop_servers(int lsiflags)
1092 struct obd_device *obd = NULL;
1093 struct obd_type *type = NULL;
1098 mutex_lock(&server_start_lock);
1100 /* Either an MDT or an OST or neither */
1101 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1102 if (lsiflags & LDD_F_SV_TYPE_MDT) {
1103 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1104 type = class_search_type(LUSTRE_MDT_NAME);
1105 } else if (lsiflags & LDD_F_SV_TYPE_OST) {
1106 /* if this was an OST, and there are no more OST's, clean up the OSS */
1107 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1108 type = class_search_type(LUSTRE_OST_NAME);
1111 /* server_stop_servers is a pair of server_start_targets
1112 * Here we put type which was taken at server_start_targets.
1113 * If type is NULL then there is a wrong logic around type or
1114 * type reference. */
1115 LASSERTF(type, "Server flags %d, obd %s\n", lsiflags,
1116 obd ? obd->obd_name : "NULL");
1118 type_last = (atomic_read(&type->typ_refcnt) == 1);
1120 class_put_type(type);
1121 if (obd != NULL && type_last) {
1123 /* obd_fail doesn't mean much on a server obd */
1124 rc = class_manual_cleanup(obd);
1127 /* put reference taken by class_search_type */
1128 kobject_put(&type->typ_kobj);
1130 mutex_unlock(&server_start_lock);
1135 int server_mti_print(const char *title, struct mgs_target_info *mti)
1137 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1138 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1139 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1140 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1141 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1142 mti->mti_config_ver, mti->mti_flags);
1146 /* Generate data for registration */
1147 static int server_lsi2mti(struct lustre_sb_info *lsi,
1148 struct mgs_target_info *mti)
1150 struct lnet_process_id id;
1155 if (!IS_SERVER(lsi))
1158 if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname))
1159 >= sizeof(mti->mti_svname))
1162 mti->mti_nid_count = 0;
1163 while (LNetGetId(i++, &id) != -ENOENT) {
1164 if (id.nid == LNET_NID_LO_0)
1167 /* server use --servicenode param, only allow specified
1168 * nids be registered */
1169 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1170 class_match_nid(lsi->lsi_lmd->lmd_params,
1171 PARAM_FAILNODE, id.nid) < 1)
1174 /* match specified network */
1175 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1176 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1179 mti->mti_nids[mti->mti_nid_count] = id.nid;
1180 mti->mti_nid_count++;
1181 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1182 CWARN("Only using first %d nids for %s\n",
1183 mti->mti_nid_count, mti->mti_svname);
1188 if (mti->mti_nid_count == 0) {
1189 CERROR("Failed to get NID for server %s, please check whether "
1190 "the target is specifed with improper --servicenode or "
1191 "--network options.\n", mti->mti_svname);
1195 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1196 mti->mti_config_ver = 0;
1198 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1202 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1205 /* Orion requires index to be set */
1206 LASSERT(!(rc & LDD_F_NEED_INDEX));
1207 /* keep only LDD flags */
1208 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1209 if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
1210 mti->mti_flags |= LDD_F_UPDATE;
1211 cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1212 sizeof(mti->mti_params));
1213 if (cplen >= sizeof(mti->mti_params))
1218 /* Register an old or new target with the MGS. If needed MGS will construct
1219 startup logs and assign index */
1220 static int server_register_target(struct lustre_sb_info *lsi)
1222 struct obd_device *mgc = lsi->lsi_mgc;
1223 struct mgs_target_info *mti = NULL;
1231 if (!IS_SERVER(lsi))
1238 rc = server_lsi2mti(lsi, mti);
1242 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1243 mti->mti_svname, mti->mti_fsname,
1244 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1247 /* if write_conf is true, the registration must succeed */
1248 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1249 mti->mti_flags |= LDD_F_OPC_REG;
1252 /* Register the target */
1253 /* FIXME use mgc_process_config instead */
1254 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1255 sizeof(KEY_REGISTER_TARGET),
1256 KEY_REGISTER_TARGET,
1257 sizeof(*mti), mti, NULL);
1259 if (mti->mti_flags & LDD_F_ERROR) {
1260 LCONSOLE_ERROR_MSG(0x160,
1261 "%s: the MGS refuses to allow this server "
1262 "to start: rc = %d. Please see messages on "
1263 "the MGS.\n", lsi->lsi_svname, rc);
1264 } else if (writeconf) {
1265 if ((rc == -ESHUTDOWN || rc == -EIO) && ++tried < 5) {
1266 /* The connection with MGS is not established.
1267 * Try again after 2 seconds. Interruptable. */
1268 schedule_timeout_interruptible(
1269 cfs_time_seconds(2));
1270 if (!signal_pending(current))
1274 LCONSOLE_ERROR_MSG(0x15f,
1275 "%s: cannot register this server with the MGS: "
1276 "rc = %d. Is the MGS running?\n",
1277 lsi->lsi_svname, rc);
1279 CDEBUG(D_HA, "%s: error registering with the MGS: "
1280 "rc = %d (not fatal)\n", lsi->lsi_svname, rc);
1281 /* reset the error code for non-fatal error. */
1294 * Notify the MGS that this target is ready.
1295 * Used by IR - if the MGS receives this message, it will notify clients.
1297 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1299 struct lustre_sb_info *lsi = s2lsi(sb);
1300 struct obd_device *mgc = lsi->lsi_mgc;
1301 struct mgs_target_info *mti = NULL;
1307 if (!(IS_SERVER(lsi)))
1313 rc = server_lsi2mti(lsi, mti);
1317 mti->mti_instance = obd->u.obt.obt_instance;
1318 mti->mti_flags |= LDD_F_OPC_READY;
1320 /* FIXME use mgc_process_config instead */
1321 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1322 sizeof(KEY_REGISTER_TARGET),
1323 KEY_REGISTER_TARGET,
1324 sizeof(*mti), mti, NULL);
1326 /* Imperative recovery: if the mgs informs us to use IR? */
1327 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1328 (mti->mti_flags & LDD_F_IR_CAPABLE))
1329 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1338 /** Start server targets: MDTs and OSTs
1340 static int server_start_targets(struct super_block *sb)
1342 struct obd_device *obd;
1343 struct lustre_sb_info *lsi = s2lsi(sb);
1344 struct config_llog_instance cfg;
1345 struct lu_env mgc_env;
1346 struct lu_device *dev;
1347 char *name_service, *obd_name_service = NULL;
1348 struct obd_type *type = NULL;
1352 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1354 LASSERTF(IS_MDT(lsi) || IS_OST(lsi), "designed for MDT or OST only\n");
1357 obd_name_service = LUSTRE_MDS_OBDNAME;
1358 name_service = LUSTRE_MDS_NAME;
1360 obd_name_service = LUSTRE_OSS_OBDNAME;
1361 name_service = LUSTRE_OSS_NAME;
1364 /* make sure MDS/OSS is started */
1365 mutex_lock(&server_start_lock);
1366 obd = class_name2obd(obd_name_service);
1368 rc = lustre_start_simple(obd_name_service, name_service,
1370 LUSTRE_MDS_OBDNAME"_uuid" :
1371 LUSTRE_OSS_OBDNAME"_uuid"),
1372 NULL, NULL, NULL, NULL);
1374 mutex_unlock(&server_start_lock);
1375 CERROR("failed to start %s: %d\n",
1376 obd_name_service, rc);
1380 /* hold a type reference and put it at server_stop_servers */
1381 type = class_get_type(IS_MDT(lsi) ?
1382 LUSTRE_MDT_NAME : LUSTRE_OST_NAME);
1384 mutex_unlock(&server_start_lock);
1385 GOTO(out_stop_service, rc = -ENODEV);
1387 lsi->lsi_server_started = 1;
1388 mutex_unlock(&server_start_lock);
1389 if (OBD_FAIL_PRECHECK(OBD_FAIL_OBD_STOP_MDS_RACE) &&
1391 OBD_RACE(OBD_FAIL_OBD_STOP_MDS_RACE);
1392 msleep(2 * MSEC_PER_SEC);
1395 rc = lu_env_init(&mgc_env, LCT_MG_THREAD);
1397 GOTO(out_stop_service, rc);
1399 /* Set the mgc fs to our server disk. This allows the MGC to
1400 * read and write configs locally, in case it can't talk to the MGS. */
1401 rc = server_mgc_set_fs(&mgc_env, lsi->lsi_mgc, sb);
1405 /* Register with MGS */
1406 rc = server_register_target(lsi);
1410 /* Let the target look up the mount using the target's name
1411 (we can't pass the sb or mnt through class_process_config.) */
1412 rc = server_register_mount(lsi->lsi_svname, sb);
1416 /* Start targets using the llog named for the target */
1417 memset(&cfg, 0, sizeof(cfg));
1418 cfg.cfg_callback = class_config_llog_handler;
1419 cfg.cfg_sub_clds = CONFIG_SUB_SERVER;
1420 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1422 CERROR("failed to start server %s: %d\n",
1423 lsi->lsi_svname, rc);
1424 /* Do NOT call server_deregister_mount() here. This makes it
1425 * impossible to find mount later in cleanup time and leaves
1426 * @lsi and othder stuff leaked. -umka */
1430 obd = class_name2obd(lsi->lsi_svname);
1432 CERROR("no server named %s was started\n", lsi->lsi_svname);
1433 GOTO(out_mgc, rc = -ENXIO);
1436 if (IS_OST(lsi) || IS_MDT(lsi)) {
1437 rc = lustre_start_lwp(sb);
1439 CERROR("%s: failed to start LWP: %d\n",
1440 lsi->lsi_svname, rc);
1445 server_notify_target(sb, obd);
1447 /* calculate recovery timeout, do it after lustre_process_log */
1448 server_calc_timeout(lsi, obd);
1450 /* log has been fully processed, let clients connect */
1451 dev = obd->obd_lu_dev;
1452 if (dev && dev->ld_ops->ldo_prepare) {
1455 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1457 struct lu_context session_ctx;
1459 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
1460 session_ctx.lc_thread = NULL;
1461 lu_context_enter(&session_ctx);
1462 env.le_ses = &session_ctx;
1464 rc = dev->ld_ops->ldo_prepare(&env, NULL, dev);
1467 lu_context_exit(&session_ctx);
1468 lu_context_fini(&session_ctx);
1472 /* abort recovery only on the complete stack:
1473 * many devices can be involved */
1474 if ((lsi->lsi_lmd->lmd_flags &
1475 (LMD_FLG_ABORT_RECOV | LMD_FLG_ABORT_RECOV_MDT)) &&
1476 (OBP(obd, iocontrol))) {
1477 struct obd_ioctl_data karg = {
1478 .ioc_type = lsi->lsi_lmd->lmd_flags,
1481 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1486 /* Release the mgc fs for others to use */
1487 server_mgc_clear_fs(&mgc_env, lsi->lsi_mgc);
1489 lu_env_fini(&mgc_env);
1491 /* in case of error upper function call
1492 * server_put_super->server_stop_servers()
1498 static int lsi_prepare(struct lustre_sb_info *lsi)
1500 const char *osd_type;
1507 LASSERT(lsi->lsi_lmd);
1509 /* The server name is given as a mount line option */
1510 if (lsi->lsi_lmd->lmd_profile == NULL) {
1511 LCONSOLE_ERROR("Can't determine server name\n");
1515 /* Determine osd type */
1516 if (lsi->lsi_lmd->lmd_osd_type == NULL) {
1517 osd_type = LUSTRE_OSD_LDISKFS_NAME;
1520 osd_type = lsi->lsi_lmd->lmd_osd_type;
1521 fstype = lsi->lsi_lmd->lmd_osd_type;
1524 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname) ||
1525 strlen(osd_type) >= sizeof(lsi->lsi_osd_type) ||
1526 strlen(fstype) >= sizeof(lsi->lsi_fstype))
1527 RETURN(-ENAMETOOLONG);
1529 strlcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile,
1530 sizeof(lsi->lsi_svname));
1531 strlcpy(lsi->lsi_osd_type, osd_type, sizeof(lsi->lsi_osd_type));
1532 /* XXX: a temp. solution for components using ldiskfs
1533 * to be removed in one of the subsequent patches */
1534 strlcpy(lsi->lsi_fstype, fstype, sizeof(lsi->lsi_fstype));
1536 /* Determine server type */
1537 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1539 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
1540 /* Assume we're a bare MGS */
1542 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
1544 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
1549 lsi->lsi_flags |= rc;
1551 /* Add mount line flags that used to be in ldd:
1552 * writeconf, mgs, anything else?
1554 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
1555 LDD_F_WRITECONF : 0;
1556 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
1558 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_UPDATE) ?
1560 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
1561 LDD_F_SV_TYPE_MGS : 0;
1562 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
1563 LDD_F_NO_PRIMNODE : 0;
1568 /*************** server mount ******************/
1570 /** Start the shutdown of servers at umount.
1572 static void server_put_super(struct super_block *sb)
1574 struct lustre_sb_info *lsi = s2lsi(sb);
1575 struct obd_device *obd;
1576 char *tmpname, *extraname = NULL;
1578 int lsiflags = lsi->lsi_flags;
1579 bool stop_servers = lsi->lsi_server_started;
1582 LASSERT(IS_SERVER(lsi));
1584 tmpname_sz = strlen(lsi->lsi_svname) + 1;
1585 OBD_ALLOC(tmpname, tmpname_sz);
1586 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
1587 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1588 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1589 snprintf(tmpname, tmpname_sz, "MGS");
1591 /* disconnect the lwp first to drain off the inflight request */
1592 if (IS_OST(lsi) || IS_MDT(lsi)) {
1595 rc = lustre_disconnect_lwp(sb);
1596 if (rc != 0 && rc != -ETIMEDOUT &&
1597 rc != -ENOTCONN && rc != -ESHUTDOWN)
1598 CWARN("%s: failed to disconnect lwp: rc= %d\n",
1602 /* Stop the target */
1603 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1604 (IS_MDT(lsi) || IS_OST(lsi))) {
1605 struct lustre_profile *lprof = NULL;
1607 /* tell the mgc to drop the config log */
1608 lustre_end_log(sb, lsi->lsi_svname, NULL);
1610 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1611 If there are any setup/cleanup errors, save the lov
1612 name for safety cleanup later. */
1613 lprof = class_get_profile(lsi->lsi_svname);
1614 if (lprof != NULL) {
1615 if (lprof->lp_dt != NULL) {
1616 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1617 strncpy(extraname, lprof->lp_dt,
1618 strlen(lprof->lp_dt) + 1);
1620 class_put_profile(lprof);
1623 obd = class_name2obd(lsi->lsi_svname);
1625 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1626 if (lsiflags & LSI_UMOUNT_FAILOVER)
1628 /* We can't seem to give an error return code
1629 * to .put_super, so we better make sure we clean up! */
1631 class_manual_cleanup(obd);
1632 if (OBD_FAIL_PRECHECK(OBD_FAIL_OBD_STOP_MDS_RACE)) {
1634 server_name2index(lsi->lsi_svname, &idx, NULL);
1635 /* sleeping for MDT0001 */
1637 OBD_RACE(OBD_FAIL_OBD_STOP_MDS_RACE);
1640 CERROR("no obd %s\n", lsi->lsi_svname);
1641 server_deregister_mount(lsi->lsi_svname);
1645 /* If they wanted the mgs to stop separately from the mdt, they
1646 should have put it on a different device. */
1648 /* if MDS start with --nomgs, don't stop MGS then */
1649 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
1650 server_stop_mgs(sb);
1653 if (IS_OST(lsi) || IS_MDT(lsi)) {
1654 if (lustre_stop_lwp(sb) < 0)
1655 CERROR("%s: failed to stop lwp!\n", tmpname);
1658 /* Clean the mgc and sb */
1659 lustre_common_put_super(sb);
1661 /* wait till all in-progress cleanups are done
1662 * specifically we're interested in ofd cleanup
1664 obd_zombie_barrier();
1666 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1667 until the target is really gone so that our type refcount check
1670 server_stop_servers(lsiflags);
1672 /* In case of startup or cleanup err, stop related obds */
1674 obd = class_name2obd(extraname);
1676 CWARN("Cleaning orphaned obd %s\n", extraname);
1678 class_manual_cleanup(obd);
1680 OBD_FREE(extraname, strlen(extraname) + 1);
1683 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1684 OBD_FREE(tmpname, tmpname_sz);
1688 /** Called only for 'umount -f'
1690 static void server_umount_begin(struct super_block *sb)
1692 struct lustre_sb_info *lsi = s2lsi(sb);
1695 CDEBUG(D_MOUNT, "umount -f\n");
1696 /* umount = failover
1698 no third way to do non-force, non-failover */
1699 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1703 static int server_statfs(struct dentry *dentry, struct kstatfs *buf)
1705 struct super_block *sb = dentry->d_sb;
1706 struct lustre_sb_info *lsi = s2lsi(sb);
1707 struct obd_statfs statfs;
1711 if (lsi->lsi_dt_dev) {
1712 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
1714 statfs_unpack(buf, &statfs);
1715 buf->f_type = sb->s_magic;
1721 buf->f_type = sb->s_magic;
1722 buf->f_bsize = sb->s_blocksize;
1728 buf->f_namelen = NAME_MAX;
1732 int server_show_options(struct seq_file *seq, struct dentry *dentry)
1734 struct lustre_sb_info *lsi;
1735 struct lustre_mount_data *lmd;
1737 LASSERT(seq != NULL && dentry != NULL);
1738 lsi = s2lsi(dentry->d_sb);
1740 seq_printf(seq, ",svname=%s", lmd->lmd_profile);
1742 if (lmd->lmd_flags & LMD_FLG_ABORT_RECOV)
1743 seq_puts(seq, ",abort_recov");
1745 if (lmd->lmd_flags & LMD_FLG_NOIR)
1746 seq_puts(seq, ",noir");
1748 if (lmd->lmd_flags & LMD_FLG_NOSVC)
1749 seq_puts(seq, ",nosvc");
1751 if (lmd->lmd_flags & LMD_FLG_NOMGS)
1752 seq_puts(seq, ",nomgs");
1754 if (lmd->lmd_flags & LMD_FLG_NOSCRUB)
1755 seq_puts(seq, ",noscrub");
1756 if (lmd->lmd_flags & LMD_FLG_SKIP_LFSCK)
1757 seq_puts(seq, ",skip_lfsck");
1759 if (lmd->lmd_flags & LMD_FLG_DEV_RDONLY)
1760 seq_puts(seq, ",rdonly_dev");
1762 if (lmd->lmd_flags & LMD_FLG_MGS)
1763 seq_puts(seq, ",mgs");
1765 if (lmd->lmd_mgs != NULL)
1766 seq_printf(seq, ",mgsnode=%s", lmd->lmd_mgs);
1768 if (lmd->lmd_osd_type != NULL)
1769 seq_printf(seq, ",osd=%s", lmd->lmd_osd_type);
1771 if (lmd->lmd_opts != NULL) {
1773 seq_puts(seq, lmd->lmd_opts);
1779 /** The operations we support directly on the superblock:
1780 * mount, umount, and df.
1782 static struct super_operations server_ops = {
1783 .put_super = server_put_super,
1784 .umount_begin = server_umount_begin, /* umount -f */
1785 .statfs = server_statfs,
1786 .show_options = server_show_options,
1790 * Xattr support for Lustre servers
1792 #ifdef HAVE_IOP_XATTR
1793 static ssize_t lustre_getxattr(struct dentry *dentry, const char *name,
1794 void *buffer, size_t size)
1796 if (!selinux_is_enabled())
1801 static int lustre_setxattr(struct dentry *dentry, const char *name,
1802 const void *value, size_t size, int flags)
1808 static ssize_t lustre_listxattr(struct dentry *d_entry, char *name,
1814 static bool is_cmd_supported(unsigned int command)
1826 static long server_ioctl(struct file *filp, unsigned int command,
1829 struct file active_filp;
1830 struct inode *inode = file_inode(filp);
1831 struct lustre_sb_info *lsi = s2lsi(inode->i_sb);
1832 struct super_block *dd_sb = dt_mnt_sb_get(lsi->lsi_dt_dev);
1833 struct inode *active_inode;
1834 int err = -EOPNOTSUPP;
1836 if (IS_ERR(dd_sb) || !is_cmd_supported(command))
1839 active_inode = igrab(dd_sb->s_root->d_inode);
1843 active_filp.f_inode = active_inode;
1844 if (active_inode->i_fop && active_inode->i_fop->unlocked_ioctl)
1845 err = active_inode->i_fop->unlocked_ioctl(&active_filp,
1851 static const struct inode_operations server_inode_operations = {
1852 #ifdef HAVE_IOP_XATTR
1853 .setxattr = lustre_setxattr,
1854 .getxattr = lustre_getxattr,
1856 .listxattr = lustre_listxattr,
1859 static const struct file_operations server_file_operations = {
1860 .unlocked_ioctl = server_ioctl,
1863 #define log2(n) ffz(~(n))
1864 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1866 static int server_fill_super_common(struct super_block *sb)
1868 struct inode *root = NULL;
1871 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1873 sb->s_blocksize = 4096;
1874 sb->s_blocksize_bits = log2(sb->s_blocksize);
1875 sb->s_magic = LUSTRE_SUPER_MAGIC;
1876 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
1877 sb->s_flags |= SB_RDONLY;
1878 sb->s_op = &server_ops;
1880 root = new_inode(sb);
1882 CERROR("Can't make root inode\n");
1886 /* returns -EIO for every operation */
1887 /* make_bad_inode(root); -- badness - can't umount */
1888 /* apparently we need to be a directory for the mount to finish */
1889 root->i_mode = S_IFDIR;
1890 root->i_op = &server_inode_operations;
1891 root->i_fop = &server_file_operations;
1892 sb->s_root = d_make_root(root);
1894 CERROR("%s: can't make root dentry\n", sb->s_id);
1901 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
1903 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1904 struct obd_device *obd;
1905 struct dt_device_param p;
1906 char flagstr[20 + 1 + 10 + 1];
1911 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
1912 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
1914 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
1915 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
1916 strcat(lsi->lsi_osd_uuid, "_UUID");
1917 snprintf(flagstr, sizeof(flagstr), "%lu:%u", mflags, lmd->lmd_flags);
1919 obd = class_name2obd(lsi->lsi_osd_obdname);
1921 rc = lustre_start_simple(lsi->lsi_osd_obdname,
1923 lsi->lsi_osd_uuid, lmd->lmd_dev,
1924 flagstr, lsi->lsi_lmd->lmd_opts,
1928 obd = class_name2obd(lsi->lsi_osd_obdname);
1931 CDEBUG(D_MOUNT, "%s already started\n", lsi->lsi_osd_obdname);
1932 /* but continue setup to allow special case of MDT and internal
1933 * MGT being started separately. */
1934 if (!((IS_MGS(lsi) && (lsi->lsi_lmd->lmd_flags &
1936 (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags &
1941 rc = obd_connect(NULL, &lsi->lsi_osd_exp,
1942 obd, &obd->obd_uuid, NULL, NULL);
1946 class_manual_cleanup(obd);
1947 lsi->lsi_dt_dev = NULL;
1951 LASSERT(obd->obd_lu_dev);
1952 lu_device_get(obd->obd_lu_dev);
1953 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
1954 LASSERT(lsi->lsi_dt_dev);
1956 /* set disk context for llog usage */
1957 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
1958 obd->obd_lvfs_ctxt.dt = lsi->lsi_dt_dev;
1960 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
1965 /** Fill in the superblock info for a Lustre server.
1966 * Mount the device with the correct options.
1967 * Read the on-disk config file.
1968 * Start the services.
1970 int server_fill_super(struct super_block *sb)
1972 struct lustre_sb_info *lsi = s2lsi(sb);
1976 /* to simulate target mount race */
1977 OBD_RACE(OBD_FAIL_TGT_MOUNT_RACE);
1979 rc = lsi_prepare(lsi);
1985 /* Start low level OSD */
1986 rc = osd_start(lsi, sb->s_flags);
1988 CERROR("Unable to start osd on %s: %d\n",
1989 lsi->lsi_lmd->lmd_dev, rc);
1994 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
1995 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
1997 if (class_name2obd(lsi->lsi_svname)) {
1998 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1999 "running. Double-mount may have compromised"
2000 " the disk journal.\n",
2006 /* Start MGS before MGC */
2007 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) {
2008 rc = server_start_mgs(sb);
2013 /* Start MGC before servers */
2014 rc = lustre_start_mgc(sb);
2018 /* Set up all obd devices for service */
2019 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
2020 (IS_OST(lsi) || IS_MDT(lsi))) {
2021 rc = server_start_targets(sb);
2023 CERROR("Unable to start targets: %d\n", rc);
2026 /* FIXME overmount client here, or can we just start a
2027 * client log and client_fill_super on this sb? We
2028 * need to make sure server_put_super gets called too
2029 * - ll_put_super calls lustre_common_put_super; check
2030 * there for LSI_SERVER flag, call s_p_s if so.
2032 * Probably should start client from new thread so we
2033 * can return. Client will not finish until all
2034 * servers are connected. Note - MGS-only server does
2035 * NOT get a client, since there is no lustre fs
2036 * associated - the MGS is for all lustre fs's */
2039 rc = server_fill_super_common(sb);
2045 /* We jump here in case of failure while starting targets or MGS.
2046 * In this case we can't just put @mnt and have to do real cleanup
2047 * with stoping targets, etc. */
2048 server_put_super(sb);
2053 * Calculate timeout value for a target.
2055 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
2057 struct lustre_mount_data *lmd;
2061 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
2062 int min = OBD_RECOVERY_TIME_MIN;
2064 LASSERT(IS_SERVER(lsi));
2068 soft = lmd->lmd_recovery_time_soft;
2069 hard = lmd->lmd_recovery_time_hard;
2070 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
2071 obd->obd_no_ir = !has_ir;
2075 soft = OBD_RECOVERY_TIME_SOFT;
2077 hard = OBD_RECOVERY_TIME_HARD;
2079 /* target may have ir_factor configured. */
2080 factor = OBD_IR_FACTOR_DEFAULT;
2081 if (obd->obd_recovery_ir_factor)
2082 factor = obd->obd_recovery_ir_factor;
2085 int new_soft = soft;
2087 /* adjust timeout value by imperative recovery */
2088 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
2089 /* make sure the timeout is not too short */
2090 new_soft = max(min, new_soft);
2092 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
2093 "window shrunk from %d-%d down to %d-%d\n",
2094 obd->obd_name, soft, hard, new_soft, hard);
2098 LCONSOLE_INFO("%s: Imperative Recovery not enabled, recovery "
2099 "window %d-%d\n", obd->obd_name, soft, hard);
2103 obd->obd_recovery_timeout = max_t(time64_t, obd->obd_recovery_timeout,
2105 obd->obd_recovery_time_hard = hard;
2106 obd->obd_recovery_ir_factor = factor;