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, 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/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 #include <linux/selinux.h>
47 #include <linux/statfs.h>
48 #include <linux/version.h>
49 #ifdef HAVE_KERNEL_LOCKED
50 #include <linux/smp_lock.h>
53 #include <lustre/lustre_idl.h>
54 #include <lustre/lustre_user.h>
56 #include <llog_swab.h>
57 #include <lustre_disk.h>
58 #include <lustre_ioctl.h>
59 #include <lustre_log.h>
60 #include <lustre_param.h>
62 #include <obd_class.h>
64 /*********** mount lookup *********/
66 static DEFINE_MUTEX(lustre_mount_info_lock);
67 static LIST_HEAD(server_mount_info_list);
69 static struct lustre_mount_info *server_find_mount(const char *name)
71 struct list_head *tmp;
72 struct lustre_mount_info *lmi;
75 list_for_each(tmp, &server_mount_info_list) {
76 lmi = list_entry(tmp, struct lustre_mount_info,
78 if (strcmp(name, lmi->lmi_name) == 0)
84 /* we must register an obd for a mount before we call the setup routine.
85 *_setup will call lustre_get_mount to get the mnt struct
86 by obd_name, since we can't pass the pointer to setup. */
87 static int server_register_mount(const char *name, struct super_block *sb)
89 struct lustre_mount_info *lmi;
95 OBD_ALLOC(lmi, sizeof(*lmi));
98 OBD_ALLOC(name_cp, strlen(name) + 1);
100 OBD_FREE(lmi, sizeof(*lmi));
103 strcpy(name_cp, name);
105 mutex_lock(&lustre_mount_info_lock);
107 if (server_find_mount(name)) {
108 mutex_unlock(&lustre_mount_info_lock);
109 OBD_FREE(lmi, sizeof(*lmi));
110 OBD_FREE(name_cp, strlen(name) + 1);
111 CERROR("Already registered %s\n", name);
114 lmi->lmi_name = name_cp;
116 list_add(&lmi->lmi_list_chain, &server_mount_info_list);
118 mutex_unlock(&lustre_mount_info_lock);
120 CDEBUG(D_MOUNT, "register mount %p from %s\n", sb, name);
125 /* when an obd no longer needs a mount */
126 static int server_deregister_mount(const char *name)
128 struct lustre_mount_info *lmi;
131 mutex_lock(&lustre_mount_info_lock);
132 lmi = server_find_mount(name);
134 mutex_unlock(&lustre_mount_info_lock);
135 CERROR("%s not registered\n", name);
139 CDEBUG(D_MOUNT, "deregister mount %p from %s\n", lmi->lmi_sb, name);
141 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
142 list_del(&lmi->lmi_list_chain);
143 OBD_FREE(lmi, sizeof(*lmi));
144 mutex_unlock(&lustre_mount_info_lock);
149 /* obd's look up a registered mount using their obdname. This is just
150 for initial obd setup to find the mount struct. It should not be
151 called every time you want to mntget. */
152 struct lustre_mount_info *server_get_mount(const char *name)
154 struct lustre_mount_info *lmi;
155 struct lustre_sb_info *lsi;
158 mutex_lock(&lustre_mount_info_lock);
159 lmi = server_find_mount(name);
160 mutex_unlock(&lustre_mount_info_lock);
162 CERROR("Can't find mount for %s\n", name);
165 lsi = s2lsi(lmi->lmi_sb);
167 atomic_inc(&lsi->lsi_mounts);
169 CDEBUG(D_MOUNT, "get mount %p from %s, refs=%d\n", lmi->lmi_sb,
170 name, atomic_read(&lsi->lsi_mounts));
174 EXPORT_SYMBOL(server_get_mount);
177 * server_put_mount: to be called from obd_cleanup methods
179 * @dereg_mnt: 0 or 1 depending on whether the mount is to be deregistered or
182 * The caller decides whether server_deregister_mount() needs to be called or
183 * not. Calling of server_deregister_mount() does not depend on refcounting on
184 * lsi because we could have say the mgs and mds on the same node and we
185 * unmount the mds, then the ref on the lsi would still be non-zero but we
186 * would still want to deregister the mds mount.
188 int server_put_mount(const char *name, bool dereg_mnt)
190 struct lustre_mount_info *lmi;
191 struct lustre_sb_info *lsi;
194 mutex_lock(&lustre_mount_info_lock);
195 lmi = server_find_mount(name);
196 mutex_unlock(&lustre_mount_info_lock);
198 CERROR("Can't find mount for %s\n", name);
201 lsi = s2lsi(lmi->lmi_sb);
203 CDEBUG(D_MOUNT, "put mount %p from %s, refs=%d\n",
204 lmi->lmi_sb, name, atomic_read(&lsi->lsi_mounts));
206 if (lustre_put_lsi(lmi->lmi_sb))
207 CDEBUG(D_MOUNT, "Last put of mount %p from %s\n",
211 /* this obd should never need the mount again */
212 server_deregister_mount(name);
216 EXPORT_SYMBOL(server_put_mount);
218 /* Set up a MGS to serve startup logs */
219 static int server_start_mgs(struct super_block *sb)
221 struct lustre_sb_info *lsi = s2lsi(sb);
222 struct lustre_mount_info *lmi;
226 /* It is impossible to have more than 1 MGS per node, since
227 MGC wouldn't know which to connect to */
228 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
230 lsi = s2lsi(lmi->lmi_sb);
231 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
236 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
238 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb);
241 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
242 LUSTRE_MGS_OBDNAME, NULL, NULL,
243 lsi->lsi_osd_obdname, NULL);
244 /* server_deregister_mount() is not called previously, for lsi
245 * and other stuff can't be freed cleanly when mgs calls
246 * server_put_mount() in error handling case (see b=17758),
247 * this problem is caused by a bug in mgs_init0, which forgot
248 * calling server_put_mount in error case. */
251 server_deregister_mount(LUSTRE_MGS_OBDNAME);
255 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
256 "Is the 'mgs' module loaded?\n",
257 LUSTRE_MGS_OBDNAME, rc);
261 static int server_stop_mgs(struct super_block *sb)
263 struct obd_device *obd;
265 struct lustre_mount_info *lmi;
268 /* Do not stop MGS if this device is not the running MGT */
269 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
270 if (lmi != NULL && lmi->lmi_sb != sb)
273 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
275 /* There better be only one MGS */
276 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
278 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
282 /* The MGS should always stop when we say so */
284 rc = class_manual_cleanup(obd);
288 /* Since there's only one mgc per node, we have to change it's fs to get
289 access to the right disk. */
290 static int server_mgc_set_fs(const struct lu_env *env,
291 struct obd_device *mgc, struct super_block *sb)
293 struct lustre_sb_info *lsi = s2lsi(sb);
297 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
299 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
300 rc = obd_set_info_async(env, mgc->obd_self_export,
301 sizeof(KEY_SET_FS), KEY_SET_FS,
302 sizeof(*sb), sb, NULL);
304 CERROR("can't set_fs %d\n", rc);
309 static int server_mgc_clear_fs(const struct lu_env *env,
310 struct obd_device *mgc)
315 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
317 rc = obd_set_info_async(env, mgc->obd_self_export,
318 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
323 static inline bool is_mdc_device(const char *devname)
327 ptr = strrchr(devname, '-');
328 return ptr != NULL && strcmp(ptr, "-mdc") == 0;
331 static inline bool tgt_is_mdt(const char *tgtname, __u32 *idx)
335 type = server_name2index(tgtname, idx, NULL);
337 return type == LDD_F_SV_TYPE_MDT;
341 * Convert OST/MDT name(fsname-{MDT,OST}xxxx) to a lwp name with the @idx:yyyy
342 * (fsname-MDTyyyy-lwp-{MDT,OST}xxxx)
344 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx)
351 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
355 rc = server_name2fsname(tgt_name, fsname, &tgt);
357 CERROR("%s: failed to get fsname from tgt_name: rc = %d\n",
362 if (*tgt != '-' && *tgt != ':') {
363 CERROR("%s: invalid tgt_name name!\n", tgt_name);
364 GOTO(cleanup, rc = -EINVAL);
368 if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
369 CERROR("%s is not an OST or MDT target!\n", tgt_name);
370 GOTO(cleanup, rc = -EINVAL);
372 snprintf(lwp_name, len, "%s-MDT%04x-%s-%s",
373 fsname, idx, LUSTRE_LWP_NAME, tgt);
375 GOTO(cleanup, rc = 0);
379 OBD_FREE(fsname, MTI_NAME_MAXLEN);
383 EXPORT_SYMBOL(tgt_name2lwp_name);
385 static LIST_HEAD(lwp_register_list);
386 static DEFINE_SPINLOCK(lwp_register_list_lock);
388 static void lustre_put_lwp_item(struct lwp_register_item *lri)
390 if (atomic_dec_and_test(&lri->lri_ref)) {
391 LASSERT(list_empty(&lri->lri_list));
393 if (*lri->lri_exp != NULL)
394 class_export_put(*lri->lri_exp);
399 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
400 register_lwp_cb cb_func, void *cb_data)
402 struct obd_device *lwp;
403 struct lwp_register_item *lri;
407 LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n",
409 LASSERT(exp != NULL && *exp == NULL);
415 lwp = class_name2obd(lwpname);
416 if (lwp != NULL && lwp->obd_set_up == 1) {
417 struct obd_uuid *uuid;
424 memcpy(uuid->uuid, lwpname, strlen(lwpname));
425 *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid);
429 memcpy(lri->lri_name, lwpname, strlen(lwpname));
431 lri->lri_cb_func = cb_func;
432 lri->lri_cb_data = cb_data;
433 INIT_LIST_HEAD(&lri->lri_list);
435 * Initialize the lri_ref at 2, one will be released before
436 * current function returned via lustre_put_lwp_item(), the
437 * other will be released in lustre_deregister_lwp_item().
439 atomic_set(&lri->lri_ref, 2);
441 spin_lock(&lwp_register_list_lock);
442 list_add(&lri->lri_list, &lwp_register_list);
445 spin_unlock(&lwp_register_list_lock);
447 if (cb && cb_func != NULL)
449 lustre_put_lwp_item(lri);
453 EXPORT_SYMBOL(lustre_register_lwp_item);
455 void lustre_deregister_lwp_item(struct obd_export **exp)
457 struct lwp_register_item *lri;
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);
463 spin_unlock(&lwp_register_list_lock);
465 lustre_put_lwp_item(lri);
469 spin_unlock(&lwp_register_list_lock);
471 EXPORT_SYMBOL(lustre_deregister_lwp_item);
473 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx)
475 struct lustre_mount_info *lmi;
476 struct lustre_sb_info *lsi;
477 struct obd_device *lwp;
478 struct obd_export *exp = NULL;
483 lmi = server_get_mount(dev);
487 lsi = s2lsi(lmi->lmi_sb);
488 rc = server_name2fsname(lsi->lsi_svname, fsname, NULL);
490 CERROR("%s: failed to get fsname: rc = %d\n",
491 lsi->lsi_svname, rc);
495 snprintf(lwp_name, sizeof(lwp_name), "%s-MDT%04x", fsname, idx);
496 spin_lock(&lsi->lsi_lwp_lock);
497 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
498 char *ptr = strstr(lwp->obd_name, lwp_name);
500 if (ptr != NULL && lwp->obd_lwp_export != NULL) {
501 exp = class_export_get(lwp->obd_lwp_export);
505 spin_unlock(&lsi->lsi_lwp_lock);
508 server_put_mount(dev, false);
512 EXPORT_SYMBOL(lustre_find_lwp_by_index);
514 void lustre_notify_lwp_list(struct obd_export *exp)
516 struct lwp_register_item *lri;
517 LASSERT(exp != NULL);
520 spin_lock(&lwp_register_list_lock);
521 list_for_each_entry(lri, &lwp_register_list, lri_list) {
522 if (strcmp(exp->exp_obd->obd_name, lri->lri_name))
524 if (*lri->lri_exp != NULL)
526 *lri->lri_exp = class_export_get(exp);
527 if (lri->lri_cb_func == NULL)
529 atomic_inc(&lri->lri_ref);
530 spin_unlock(&lwp_register_list_lock);
532 lri->lri_cb_func(lri->lri_cb_data);
533 lustre_put_lwp_item(lri);
535 /* Others may have changed the list after we unlock, we have
536 * to rescan the list from the beginning. Usually, the list
537 * 'lwp_register_list' is very short, and there is 'guard'
538 * lri::lri_exp that will prevent the callback to be done
539 * repeatedly. So rescanning the list has no problem. */
542 spin_unlock(&lwp_register_list_lock);
544 EXPORT_SYMBOL(lustre_notify_lwp_list);
546 static int lustre_lwp_connect(struct obd_device *lwp)
549 struct lu_context session_ctx;
550 struct obd_export *exp;
551 struct obd_uuid *uuid = NULL;
552 struct obd_connect_data *data = NULL;
556 /* log has been fully processed, let clients connect */
557 rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags);
561 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
562 session_ctx.lc_thread = NULL;
563 lu_context_enter(&session_ctx);
564 env.le_ses = &session_ctx;
568 GOTO(out, rc = -ENOMEM);
570 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
571 data->ocd_version = LUSTRE_VERSION_CODE;
572 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
573 OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE |
574 OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE |
575 OBD_CONNECT_LIGHTWEIGHT | OBD_CONNECT_LFSCK |
576 OBD_CONNECT_BULK_MBITS;
579 GOTO(out, rc = -ENOMEM);
581 if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) {
582 CERROR("%s: Too long lwp name %s, max_size is %d\n",
583 lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid));
584 GOTO(out, rc = -EINVAL);
587 /* Use lwp name as the uuid, so we find the export by lwp name later */
588 memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name));
589 rc = obd_connect(&env, &exp, lwp, uuid, data, NULL);
591 CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc);
593 if (unlikely(lwp->obd_lwp_export != NULL))
594 class_export_put(lwp->obd_lwp_export);
595 lwp->obd_lwp_export = class_export_get(exp);
607 lu_context_exit(&session_ctx);
608 lu_context_fini(&session_ctx);
614 * lwp is used by slaves (Non-MDT0 targets) to manage the connection to MDT0,
615 * or from the OSTx to MDTy.
617 static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi,
620 struct obd_device *obd;
621 char *lwpname = NULL;
622 char *lwpuuid = NULL;
626 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
629 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
633 OBD_ALLOC(lwpname, MTI_NAME_MAXLEN);
635 GOTO(out, rc = -ENOMEM);
637 rc = tgt_name2lwp_name(lsi->lsi_svname, lwpname, MTI_NAME_MAXLEN, idx);
639 CERROR("%s: failed to generate lwp name: rc = %d\n",
640 lsi->lsi_svname, rc);
644 OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN);
646 GOTO(out, rc = -ENOMEM);
648 sprintf(lwpuuid, "%s_UUID", lwpname);
649 rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME,
650 lwpuuid, lustre_cfg_string(lcfg, 1),
653 CERROR("%s: setup up failed: rc %d\n", lwpname, rc);
657 obd = class_name2obd(lwpname);
658 LASSERT(obd != NULL);
660 rc = lustre_lwp_connect(obd);
662 obd->u.cli.cl_max_mds_easize = MAX_MD_SIZE;
663 spin_lock(&lsi->lsi_lwp_lock);
664 list_add_tail(&obd->obd_lwp_list, &lsi->lsi_lwp_list);
665 spin_unlock(&lsi->lsi_lwp_lock);
667 CERROR("%s: connect failed: rc = %d\n", lwpname, rc);
674 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
676 OBD_FREE(lwpuuid, MTI_NAME_MAXLEN);
681 /* the caller is responsible for memory free */
682 static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi,
683 char **lwpname, __u32 idx)
685 struct obd_device *lwp;
689 LASSERT(lwpname != NULL);
690 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
692 OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN);
693 if (*lwpname == NULL)
694 RETURN(ERR_PTR(-ENOMEM));
696 rc = tgt_name2lwp_name(lsi->lsi_svname, *lwpname, MTI_NAME_MAXLEN, idx);
698 CERROR("%s: failed to generate lwp name: rc = %d\n",
699 lsi->lsi_svname, rc);
700 GOTO(out, rc = -EINVAL);
703 lwp = class_name2obd(*lwpname);
707 if (*lwpname != NULL) {
708 OBD_FREE(*lwpname, MTI_NAME_MAXLEN);
714 RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT));
717 static int lustre_lwp_add_conn(struct lustre_cfg *cfg,
718 struct lustre_sb_info *lsi, __u32 idx)
720 struct lustre_cfg_bufs *bufs = NULL;
721 struct lustre_cfg *lcfg = NULL;
722 char *lwpname = NULL;
723 struct obd_device *lwp;
727 lwp = lustre_find_lwp(lsi, &lwpname, idx);
729 CERROR("%s: can't find lwp device.\n", lsi->lsi_svname);
730 GOTO(out, rc = PTR_ERR(lwp));
732 LASSERT(lwpname != NULL);
736 GOTO(out, rc = -ENOMEM);
738 lustre_cfg_bufs_reset(bufs, lwpname);
739 lustre_cfg_bufs_set_string(bufs, 1,
740 lustre_cfg_string(cfg, 1));
742 lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
744 GOTO(out_cfg, rc = -ENOMEM);
745 rc = class_add_conn(lwp, lcfg);
747 CERROR("%s: can't add conn: rc = %d\n", lwpname, rc);
750 lustre_cfg_free(lcfg);
756 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
761 * Retrieve MDT nids from the client log, then start the lwp device.
762 * there are only two scenarios which would include mdt nid.
764 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxx-
765 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
766 * attach 0:lustre-MDTyyyy-mdc 1:mdc 2:lustre-clilmv_UUID
767 * setup 0:lustre-MDTyyyy-mdc 1:lustre-MDTyyyy_UUID 2:192.168.122.162@tcp
768 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
769 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.172.1@tcp
770 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDTyyyy_UUID xxxx
771 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxxx-
773 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
774 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
775 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.122.2@tcp
776 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
778 static int client_lwp_config_process(const struct lu_env *env,
779 struct llog_handle *handle,
780 struct llog_rec_hdr *rec, void *data)
782 struct config_llog_instance *cfg = data;
783 int cfg_len = rec->lrh_len;
784 char *cfg_buf = (char *) (rec + 1);
785 struct lustre_cfg *lcfg = NULL;
786 struct lustre_sb_info *lsi;
787 int rc = 0, swab = 0;
790 if (rec->lrh_type != OBD_CFG_REC) {
791 CERROR("Unknown llog record type %#x encountered\n",
796 if (cfg->cfg_sb == NULL)
797 GOTO(out, rc = -EINVAL);
798 lsi = s2lsi(cfg->cfg_sb);
800 lcfg = (struct lustre_cfg *)cfg_buf;
801 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
802 lustre_swab_lustre_cfg(lcfg);
806 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
810 switch (lcfg->lcfg_command) {
812 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
814 lustre_swab_cfg_marker(marker, swab,
815 LUSTRE_CFG_BUFLEN(lcfg, 1));
816 if (marker->cm_flags & CM_SKIP ||
817 marker->cm_flags & CM_EXCLUDE)
820 if (!tgt_is_mdt(marker->cm_tgtname, &cfg->cfg_lwp_idx))
823 if (IS_MDT(lsi) && cfg->cfg_lwp_idx != 0)
826 if (!strncmp(marker->cm_comment, "add mdc", 7) ||
827 !strncmp(marker->cm_comment, "add failnid", 11)) {
828 if (marker->cm_flags & CM_START) {
829 cfg->cfg_flags = CFG_F_MARKER;
830 /* This hack is to differentiate the
831 * ADD_UUID is come from "add mdc" record
832 * or from "add failnid" record. */
833 if (!strncmp(marker->cm_comment,
835 cfg->cfg_flags |= CFG_F_SKIP;
836 } else if (marker->cm_flags & CM_END) {
842 case LCFG_ADD_UUID: {
843 if (cfg->cfg_flags == CFG_F_MARKER) {
844 rc = lustre_lwp_setup(lcfg, lsi, cfg->cfg_lwp_idx);
845 /* XXX: process only the first nid as
846 * we don't need another instance of lwp */
847 cfg->cfg_flags |= CFG_F_SKIP;
848 } else if (cfg->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
849 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
852 CERROR("%s: Fail to add uuid, rc:%d\n",
853 lsi->lsi_svname, rc);
857 case LCFG_ADD_CONN: {
858 char *devname = lustre_cfg_string(lcfg, 0);
862 if (!is_mdc_device(devname))
865 ptr = strrchr(devname, '-');
870 if (!tgt_is_mdt(devname, &idx)) {
876 if (IS_MDT(lsi) && idx != 0)
879 rc = lustre_lwp_add_conn(lcfg, lsi, idx);
889 static int lustre_disconnect_lwp(struct super_block *sb)
891 struct lustre_sb_info *lsi = s2lsi(sb);
892 struct obd_device *lwp;
893 char *logname = NULL;
894 struct lustre_cfg_bufs *bufs = NULL;
895 struct config_llog_instance *cfg = NULL;
900 if (likely(lsi->lsi_lwp_started)) {
901 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
905 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
907 CERROR("%s: failed to get fsname from svname: "
908 "rc = %d\n", lsi->lsi_svname, rc);
909 GOTO(out, rc = -EINVAL);
912 strcat(logname, "-client");
915 GOTO(out, rc = -ENOMEM);
918 cfg->cfg_instance = sb;
919 rc = lustre_end_log(sb, logname, cfg);
920 if (rc != 0 && rc != -ENOENT)
923 lsi->lsi_lwp_started = 0;
928 GOTO(out, rc = -ENOMEM);
930 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
931 struct lustre_cfg *lcfg;
933 if (likely(lwp->obd_lwp_export != NULL)) {
934 class_export_put(lwp->obd_lwp_export);
935 lwp->obd_lwp_export = NULL;
938 lustre_cfg_bufs_reset(bufs, lwp->obd_name);
939 lustre_cfg_bufs_set_string(bufs, 1, NULL);
940 lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
942 GOTO(out, rc = -ENOMEM);
944 /* Disconnect import first. NULL is passed for the '@env',
945 * since it will not be used. */
946 rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL,
947 lwp->obd_lu_dev, lcfg);
948 lustre_cfg_free(lcfg);
949 if (rc != 0 && rc != -ETIMEDOUT) {
950 CERROR("%s: fail to disconnect LWP: rc = %d\n",
964 OBD_FREE(logname, MTI_NAME_MAXLEN);
966 return rc1 != 0 ? rc1 : rc;
970 * Stop the lwp for an OST/MDT target.
972 static int lustre_stop_lwp(struct super_block *sb)
974 struct lustre_sb_info *lsi = s2lsi(sb);
975 struct obd_device *lwp;
980 while (!list_empty(&lsi->lsi_lwp_list)) {
981 lwp = list_entry(lsi->lsi_lwp_list.next, struct obd_device,
983 list_del_init(&lwp->obd_lwp_list);
985 rc = class_manual_cleanup(lwp);
987 CERROR("%s: fail to stop LWP: rc = %d\n",
993 RETURN(rc1 != 0 ? rc1 : rc);
997 * Start the lwp(fsname-MDTyyyy-lwp-{MDT,OST}xxxx) for a MDT/OST or MDT target.
999 static int lustre_start_lwp(struct super_block *sb)
1001 struct lustre_sb_info *lsi = s2lsi(sb);
1002 struct config_llog_instance *cfg = NULL;
1007 if (unlikely(lsi->lsi_lwp_started))
1010 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
1011 if (logname == NULL)
1014 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
1016 CERROR("%s: failed to get fsname from svname: rc = %d\n",
1017 lsi->lsi_svname, rc);
1018 GOTO(out, rc = -EINVAL);
1021 strcat(logname, "-client");
1024 GOTO(out, rc = -ENOMEM);
1026 cfg->cfg_callback = client_lwp_config_process;
1027 cfg->cfg_instance = sb;
1028 rc = lustre_process_log(sb, logname, cfg);
1029 /* need to remove config llog from mgc */
1030 lsi->lsi_lwp_started = 1;
1035 OBD_FREE(logname, MTI_NAME_MAXLEN);
1042 static DEFINE_MUTEX(server_start_lock);
1044 /* Stop MDS/OSS if nobody is using them */
1045 static int server_stop_servers(int lsiflags)
1047 struct obd_device *obd = NULL;
1048 struct obd_type *type = NULL;
1052 mutex_lock(&server_start_lock);
1054 /* Either an MDT or an OST or neither */
1055 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1056 if (lsiflags & LDD_F_SV_TYPE_MDT) {
1057 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1059 type = class_search_type(LUSTRE_MDT_NAME);
1062 /* if this was an OST, and there are no more OST's, clean up the OSS */
1063 if (lsiflags & LDD_F_SV_TYPE_OST) {
1064 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1066 type = class_search_type(LUSTRE_OST_NAME);
1069 if (obd != NULL && (type == NULL || type->typ_refcnt == 0)) {
1071 /* obd_fail doesn't mean much on a server obd */
1072 rc = class_manual_cleanup(obd);
1075 mutex_unlock(&server_start_lock);
1080 int server_mti_print(const char *title, struct mgs_target_info *mti)
1082 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1083 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1084 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1085 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1086 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1087 mti->mti_config_ver, mti->mti_flags);
1091 /* Generate data for registration */
1092 static int server_lsi2mti(struct lustre_sb_info *lsi,
1093 struct mgs_target_info *mti)
1095 struct lnet_process_id id;
1100 if (!IS_SERVER(lsi))
1103 if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname))
1104 >= sizeof(mti->mti_svname))
1107 mti->mti_nid_count = 0;
1108 while (LNetGetId(i++, &id) != -ENOENT) {
1109 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1112 /* server use --servicenode param, only allow specified
1113 * nids be registered */
1114 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1115 class_match_nid(lsi->lsi_lmd->lmd_params,
1116 PARAM_FAILNODE, id.nid) < 1)
1119 /* match specified network */
1120 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1121 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1124 mti->mti_nids[mti->mti_nid_count] = id.nid;
1125 mti->mti_nid_count++;
1126 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1127 CWARN("Only using first %d nids for %s\n",
1128 mti->mti_nid_count, mti->mti_svname);
1133 if (mti->mti_nid_count == 0) {
1134 CERROR("Failed to get NID for server %s, please check whether "
1135 "the target is specifed with improper --servicenode or "
1136 "--network options.\n", mti->mti_svname);
1140 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1141 mti->mti_config_ver = 0;
1143 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1147 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1150 /* Orion requires index to be set */
1151 LASSERT(!(rc & LDD_F_NEED_INDEX));
1152 /* keep only LDD flags */
1153 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1154 if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
1155 mti->mti_flags |= LDD_F_UPDATE;
1156 cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1157 sizeof(mti->mti_params));
1158 if (cplen >= sizeof(mti->mti_params))
1163 /* Register an old or new target with the MGS. If needed MGS will construct
1164 startup logs and assign index */
1165 static int server_register_target(struct lustre_sb_info *lsi)
1167 struct obd_device *mgc = lsi->lsi_mgc;
1168 struct mgs_target_info *mti = NULL;
1175 if (!IS_SERVER(lsi))
1182 rc = server_lsi2mti(lsi, mti);
1186 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1187 mti->mti_svname, mti->mti_fsname,
1188 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1191 /* if write_conf is true, the registration must succeed */
1192 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1193 mti->mti_flags |= LDD_F_OPC_REG;
1195 /* Register the target */
1196 /* FIXME use mgc_process_config instead */
1197 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1198 sizeof(KEY_REGISTER_TARGET),
1199 KEY_REGISTER_TARGET,
1200 sizeof(*mti), mti, NULL);
1202 if (mti->mti_flags & LDD_F_ERROR) {
1203 LCONSOLE_ERROR_MSG(0x160,
1204 "%s: the MGS refuses to allow this server "
1205 "to start: rc = %d. Please see messages on "
1206 "the MGS.\n", lsi->lsi_svname, rc);
1207 } else if (writeconf) {
1208 LCONSOLE_ERROR_MSG(0x15f,
1209 "%s: cannot register this server with the MGS: "
1210 "rc = %d. Is the MGS running?\n",
1211 lsi->lsi_svname, rc);
1213 CDEBUG(D_HA, "%s: error registering with the MGS: "
1214 "rc = %d (not fatal)\n", lsi->lsi_svname, rc);
1215 /* reset the error code for non-fatal error. */
1228 * Notify the MGS that this target is ready.
1229 * Used by IR - if the MGS receives this message, it will notify clients.
1231 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1233 struct lustre_sb_info *lsi = s2lsi(sb);
1234 struct obd_device *mgc = lsi->lsi_mgc;
1235 struct mgs_target_info *mti = NULL;
1241 if (!(IS_SERVER(lsi)))
1247 rc = server_lsi2mti(lsi, mti);
1251 mti->mti_instance = obd->u.obt.obt_instance;
1252 mti->mti_flags |= LDD_F_OPC_READY;
1254 /* FIXME use mgc_process_config instead */
1255 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1256 sizeof(KEY_REGISTER_TARGET),
1257 KEY_REGISTER_TARGET,
1258 sizeof(*mti), mti, NULL);
1260 /* Imperative recovery: if the mgs informs us to use IR? */
1261 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1262 (mti->mti_flags & LDD_F_IR_CAPABLE))
1263 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1272 /** Start server targets: MDTs and OSTs
1274 static int server_start_targets(struct super_block *sb)
1276 struct obd_device *obd;
1277 struct lustre_sb_info *lsi = s2lsi(sb);
1278 struct config_llog_instance cfg;
1279 struct lu_env mgc_env;
1280 struct lu_device *dev;
1284 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1287 /* make sure the MDS is started */
1288 mutex_lock(&server_start_lock);
1289 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1291 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1293 LUSTRE_MDS_OBDNAME"_uuid",
1294 NULL, NULL, NULL, NULL);
1296 mutex_unlock(&server_start_lock);
1297 CERROR("failed to start MDS: %d\n", rc);
1301 mutex_unlock(&server_start_lock);
1304 /* If we're an OST, make sure the global OSS is running */
1306 /* make sure OSS is started */
1307 mutex_lock(&server_start_lock);
1308 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1310 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1312 LUSTRE_OSS_OBDNAME"_uuid",
1313 NULL, NULL, NULL, NULL);
1315 mutex_unlock(&server_start_lock);
1316 CERROR("failed to start OSS: %d\n", rc);
1320 mutex_unlock(&server_start_lock);
1323 rc = lu_env_init(&mgc_env, LCT_MG_THREAD);
1325 GOTO(out_stop_service, rc);
1327 /* Set the mgc fs to our server disk. This allows the MGC to
1328 * read and write configs locally, in case it can't talk to the MGS. */
1329 rc = server_mgc_set_fs(&mgc_env, lsi->lsi_mgc, sb);
1333 /* Register with MGS */
1334 rc = server_register_target(lsi);
1338 /* Let the target look up the mount using the target's name
1339 (we can't pass the sb or mnt through class_process_config.) */
1340 rc = server_register_mount(lsi->lsi_svname, sb);
1344 /* Start targets using the llog named for the target */
1345 memset(&cfg, 0, sizeof(cfg));
1346 cfg.cfg_callback = class_config_llog_handler;
1347 cfg.cfg_sub_clds = CONFIG_SUB_SERVER;
1348 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1350 CERROR("failed to start server %s: %d\n",
1351 lsi->lsi_svname, rc);
1352 /* Do NOT call server_deregister_mount() here. This makes it
1353 * impossible to find mount later in cleanup time and leaves
1354 * @lsi and othder stuff leaked. -umka */
1358 obd = class_name2obd(lsi->lsi_svname);
1360 CERROR("no server named %s was started\n", lsi->lsi_svname);
1361 GOTO(out_mgc, rc = -ENXIO);
1364 if (IS_OST(lsi) || IS_MDT(lsi)) {
1365 rc = lustre_start_lwp(sb);
1367 CERROR("%s: failed to start LWP: %d\n",
1368 lsi->lsi_svname, rc);
1373 server_notify_target(sb, obd);
1375 /* calculate recovery timeout, do it after lustre_process_log */
1376 server_calc_timeout(lsi, obd);
1378 /* log has been fully processed, let clients connect */
1379 dev = obd->obd_lu_dev;
1380 if (dev && dev->ld_ops->ldo_prepare) {
1383 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1385 struct lu_context session_ctx;
1387 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
1388 session_ctx.lc_thread = NULL;
1389 lu_context_enter(&session_ctx);
1390 env.le_ses = &session_ctx;
1392 rc = dev->ld_ops->ldo_prepare(&env, NULL, dev);
1395 lu_context_exit(&session_ctx);
1396 lu_context_fini(&session_ctx);
1400 /* abort recovery only on the complete stack:
1401 * many devices can be involved */
1402 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1403 (OBP(obd, iocontrol))) {
1404 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1409 /* Release the mgc fs for others to use */
1410 server_mgc_clear_fs(&mgc_env, lsi->lsi_mgc);
1412 lu_env_fini(&mgc_env);
1415 server_stop_servers(lsi->lsi_flags);
1420 static int lsi_prepare(struct lustre_sb_info *lsi)
1422 const char *osd_type;
1429 LASSERT(lsi->lsi_lmd);
1431 /* The server name is given as a mount line option */
1432 if (lsi->lsi_lmd->lmd_profile == NULL) {
1433 LCONSOLE_ERROR("Can't determine server name\n");
1437 /* Determine osd type */
1438 if (lsi->lsi_lmd->lmd_osd_type == NULL) {
1439 osd_type = LUSTRE_OSD_LDISKFS_NAME;
1442 osd_type = lsi->lsi_lmd->lmd_osd_type;
1443 fstype = lsi->lsi_lmd->lmd_osd_type;
1446 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname) ||
1447 strlen(osd_type) >= sizeof(lsi->lsi_osd_type) ||
1448 strlen(fstype) >= sizeof(lsi->lsi_fstype))
1449 RETURN(-ENAMETOOLONG);
1451 strlcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile,
1452 sizeof(lsi->lsi_svname));
1453 strlcpy(lsi->lsi_osd_type, osd_type, sizeof(lsi->lsi_osd_type));
1454 /* XXX: a temp. solution for components using ldiskfs
1455 * to be removed in one of the subsequent patches */
1456 strlcpy(lsi->lsi_fstype, fstype, sizeof(lsi->lsi_fstype));
1458 /* Determine server type */
1459 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1461 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
1462 /* Assume we're a bare MGS */
1464 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
1466 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
1471 lsi->lsi_flags |= rc;
1473 /* Add mount line flags that used to be in ldd:
1474 * writeconf, mgs, anything else?
1476 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
1477 LDD_F_WRITECONF : 0;
1478 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
1480 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_UPDATE) ?
1482 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
1483 LDD_F_SV_TYPE_MGS : 0;
1484 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
1485 LDD_F_NO_PRIMNODE : 0;
1490 /*************** server mount ******************/
1492 /** Start the shutdown of servers at umount.
1494 static void server_put_super(struct super_block *sb)
1496 struct lustre_sb_info *lsi = s2lsi(sb);
1497 struct obd_device *obd;
1498 char *tmpname, *extraname = NULL;
1500 int lsiflags = lsi->lsi_flags;
1503 LASSERT(IS_SERVER(lsi));
1505 tmpname_sz = strlen(lsi->lsi_svname) + 1;
1506 OBD_ALLOC(tmpname, tmpname_sz);
1507 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
1508 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1509 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1510 snprintf(tmpname, tmpname_sz, "MGS");
1512 /* disconnect the lwp first to drain off the inflight request */
1513 if (IS_OST(lsi) || IS_MDT(lsi)) {
1516 rc = lustre_disconnect_lwp(sb);
1517 if (rc != 0 && rc != -ETIMEDOUT &&
1518 rc != -ENOTCONN && rc != -ESHUTDOWN)
1519 CWARN("%s: failed to disconnect lwp: rc= %d\n",
1523 /* Stop the target */
1524 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1525 (IS_MDT(lsi) || IS_OST(lsi))) {
1526 struct lustre_profile *lprof = NULL;
1528 /* tell the mgc to drop the config log */
1529 lustre_end_log(sb, lsi->lsi_svname, NULL);
1531 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1532 If there are any setup/cleanup errors, save the lov
1533 name for safety cleanup later. */
1534 lprof = class_get_profile(lsi->lsi_svname);
1535 if (lprof != NULL) {
1536 if (lprof->lp_dt != NULL) {
1537 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1538 strncpy(extraname, lprof->lp_dt,
1539 strlen(lprof->lp_dt) + 1);
1541 class_put_profile(lprof);
1544 obd = class_name2obd(lsi->lsi_svname);
1546 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1547 if (lsiflags & LSI_UMOUNT_FAILOVER)
1549 /* We can't seem to give an error return code
1550 * to .put_super, so we better make sure we clean up! */
1552 class_manual_cleanup(obd);
1554 CERROR("no obd %s\n", lsi->lsi_svname);
1555 server_deregister_mount(lsi->lsi_svname);
1559 /* If they wanted the mgs to stop separately from the mdt, they
1560 should have put it on a different device. */
1562 /* if MDS start with --nomgs, don't stop MGS then */
1563 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
1564 server_stop_mgs(sb);
1567 if (IS_OST(lsi) || IS_MDT(lsi)) {
1568 if (lustre_stop_lwp(sb) < 0)
1569 CERROR("%s: failed to stop lwp!\n", tmpname);
1572 /* Clean the mgc and sb */
1573 lustre_common_put_super(sb);
1575 /* wait till all in-progress cleanups are done
1576 * specifically we're interested in ofd cleanup
1578 obd_zombie_barrier();
1580 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1581 until the target is really gone so that our type refcount check
1583 server_stop_servers(lsiflags);
1585 /* In case of startup or cleanup err, stop related obds */
1587 obd = class_name2obd(extraname);
1589 CWARN("Cleaning orphaned obd %s\n", extraname);
1591 class_manual_cleanup(obd);
1593 OBD_FREE(extraname, strlen(extraname) + 1);
1596 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1597 OBD_FREE(tmpname, tmpname_sz);
1601 /** Called only for 'umount -f'
1603 static void server_umount_begin(struct super_block *sb)
1605 struct lustre_sb_info *lsi = s2lsi(sb);
1608 CDEBUG(D_MOUNT, "umount -f\n");
1609 /* umount = failover
1611 no third way to do non-force, non-failover */
1612 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1616 static int server_statfs(struct dentry *dentry, struct kstatfs *buf)
1618 struct super_block *sb = dentry->d_sb;
1619 struct lustre_sb_info *lsi = s2lsi(sb);
1620 struct obd_statfs statfs;
1624 if (lsi->lsi_dt_dev) {
1625 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
1627 statfs_unpack(buf, &statfs);
1628 buf->f_type = sb->s_magic;
1634 buf->f_type = sb->s_magic;
1635 buf->f_bsize = sb->s_blocksize;
1641 buf->f_namelen = NAME_MAX;
1645 /** The operations we support directly on the superblock:
1646 * mount, umount, and df.
1648 static struct super_operations server_ops = {
1649 .put_super = server_put_super,
1650 .umount_begin = server_umount_begin, /* umount -f */
1651 .statfs = server_statfs,
1655 * Xattr support for Lustre servers
1657 static ssize_t lustre_getxattr(struct dentry *dentry, const char *name,
1658 void *buffer, size_t size)
1660 if (!selinux_is_enabled())
1665 static int lustre_setxattr(struct dentry *dentry, const char *name,
1666 const void *value, size_t size, int flags)
1671 static ssize_t lustre_listxattr(struct dentry *d_entry, char *name,
1677 static const struct inode_operations server_inode_operations = {
1678 .setxattr = lustre_setxattr,
1679 .getxattr = lustre_getxattr,
1680 .listxattr = lustre_listxattr,
1683 #define log2(n) ffz(~(n))
1684 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1686 static int server_fill_super_common(struct super_block *sb)
1688 struct inode *root = NULL;
1691 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1693 sb->s_blocksize = 4096;
1694 sb->s_blocksize_bits = log2(sb->s_blocksize);
1695 sb->s_magic = LUSTRE_SUPER_MAGIC;
1696 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
1697 sb->s_flags |= MS_RDONLY;
1698 sb->s_op = &server_ops;
1700 root = new_inode(sb);
1702 CERROR("Can't make root inode\n");
1706 /* returns -EIO for every operation */
1707 /* make_bad_inode(root); -- badness - can't umount */
1708 /* apparently we need to be a directory for the mount to finish */
1709 root->i_mode = S_IFDIR;
1710 root->i_op = &server_inode_operations;
1711 sb->s_root = d_make_root(root);
1713 CERROR("%s: can't make root dentry\n", sb->s_id);
1720 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
1722 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1723 struct obd_device *obd;
1724 struct dt_device_param p;
1730 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
1731 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
1733 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
1734 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
1735 strcat(lsi->lsi_osd_uuid, "_UUID");
1736 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
1738 obd = class_name2obd(lsi->lsi_osd_obdname);
1740 rc = lustre_start_simple(lsi->lsi_osd_obdname,
1742 lsi->lsi_osd_uuid, lmd->lmd_dev,
1743 flagstr, lsi->lsi_lmd->lmd_opts,
1747 obd = class_name2obd(lsi->lsi_osd_obdname);
1750 CDEBUG(D_MOUNT, "%s already started\n", lsi->lsi_osd_obdname);
1751 /* but continue setup to allow special case of MDT and internal
1752 * MGT being started separately. */
1753 if (!((IS_MGS(lsi) && (lsi->lsi_lmd->lmd_flags &
1755 (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags &
1760 rc = obd_connect(NULL, &lsi->lsi_osd_exp,
1761 obd, &obd->obd_uuid, NULL, NULL);
1765 class_manual_cleanup(obd);
1766 lsi->lsi_dt_dev = NULL;
1770 LASSERT(obd->obd_lu_dev);
1771 lu_device_get(obd->obd_lu_dev);
1772 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
1773 LASSERT(lsi->lsi_dt_dev);
1775 /* set disk context for llog usage */
1776 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
1777 obd->obd_lvfs_ctxt.dt = lsi->lsi_dt_dev;
1779 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
1784 /** Fill in the superblock info for a Lustre server.
1785 * Mount the device with the correct options.
1786 * Read the on-disk config file.
1787 * Start the services.
1789 int server_fill_super(struct super_block *sb)
1791 struct lustre_sb_info *lsi = s2lsi(sb);
1795 /* to simulate target mount race */
1796 OBD_RACE(OBD_FAIL_TGT_MOUNT_RACE);
1798 rc = lsi_prepare(lsi);
1802 /* Start low level OSD */
1803 rc = osd_start(lsi, sb->s_flags);
1805 CERROR("Unable to start osd on %s: %d\n",
1806 lsi->lsi_lmd->lmd_dev, rc);
1811 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
1812 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
1814 if (class_name2obd(lsi->lsi_svname)) {
1815 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1816 "running. Double-mount may have compromised"
1817 " the disk journal.\n",
1823 /* Start MGS before MGC */
1824 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) {
1825 rc = server_start_mgs(sb);
1830 /* Start MGC before servers */
1831 rc = lustre_start_mgc(sb);
1835 /* Set up all obd devices for service */
1836 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1837 (IS_OST(lsi) || IS_MDT(lsi))) {
1838 rc = server_start_targets(sb);
1840 CERROR("Unable to start targets: %d\n", rc);
1843 /* FIXME overmount client here, or can we just start a
1844 * client log and client_fill_super on this sb? We
1845 * need to make sure server_put_super gets called too
1846 * - ll_put_super calls lustre_common_put_super; check
1847 * there for LSI_SERVER flag, call s_p_s if so.
1849 * Probably should start client from new thread so we
1850 * can return. Client will not finish until all
1851 * servers are connected. Note - MGS-only server does
1852 * NOT get a client, since there is no lustre fs
1853 * associated - the MGS is for all lustre fs's */
1856 rc = server_fill_super_common(sb);
1862 /* We jump here in case of failure while starting targets or MGS.
1863 * In this case we can't just put @mnt and have to do real cleanup
1864 * with stoping targets, etc. */
1865 server_put_super(sb);
1870 * Calculate timeout value for a target.
1872 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
1874 struct lustre_mount_data *lmd;
1878 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
1879 int min = OBD_RECOVERY_TIME_MIN;
1881 LASSERT(IS_SERVER(lsi));
1885 soft = lmd->lmd_recovery_time_soft;
1886 hard = lmd->lmd_recovery_time_hard;
1887 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
1888 obd->obd_no_ir = !has_ir;
1892 soft = OBD_RECOVERY_TIME_SOFT;
1894 hard = OBD_RECOVERY_TIME_HARD;
1896 /* target may have ir_factor configured. */
1897 factor = OBD_IR_FACTOR_DEFAULT;
1898 if (obd->obd_recovery_ir_factor)
1899 factor = obd->obd_recovery_ir_factor;
1902 int new_soft = soft;
1904 /* adjust timeout value by imperative recovery */
1905 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
1906 /* make sure the timeout is not too short */
1907 new_soft = max(min, new_soft);
1909 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
1910 "window shrunk from %d-%d down to %d-%d\n",
1911 obd->obd_name, soft, hard, new_soft, hard);
1915 LCONSOLE_INFO("%s: Imperative Recovery not enabled, recovery "
1916 "window %d-%d\n", obd->obd_name, soft, hard);
1920 obd->obd_recovery_timeout = max_t(time64_t, obd->obd_recovery_timeout,
1922 obd->obd_recovery_time_hard = hard;
1923 obd->obd_recovery_ir_factor = factor;