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.sun.com/software/products/lustre/docs/GPLv2.pdf
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
30 * Copyright (c) 2013, 2015, Intel Corporation.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/obdclass/obd_mount_server.c
38 * Server mount routines
40 * Author: Nathan Rutman <nathan@clusterfs.com>
44 #define DEBUG_SUBSYSTEM S_CLASS
45 #define D_MOUNT (D_SUPER | D_CONFIG /* | D_WARNING */)
46 #define PRINT_CMD CDEBUG
47 #define PRINT_MASK (D_SUPER | D_CONFIG)
49 #include <linux/types.h>
50 #include <linux/selinux.h>
51 #include <linux/statfs.h>
52 #include <linux/version.h>
53 #ifdef HAVE_KERNEL_LOCKED
54 #include <linux/smp_lock.h>
57 #include <lustre/lustre_idl.h>
58 #include <lustre/lustre_user.h>
60 #include <llog_swab.h>
61 #include <lustre_disk.h>
62 #include <lustre_ioctl.h>
63 #include <lustre_log.h>
64 #include <lustre_param.h>
66 #include <obd_class.h>
68 /*********** mount lookup *********/
70 static DEFINE_MUTEX(lustre_mount_info_lock);
71 static struct list_head server_mount_info_list =
72 LIST_HEAD_INIT(server_mount_info_list);
74 static struct lustre_mount_info *server_find_mount(const char *name)
76 struct list_head *tmp;
77 struct lustre_mount_info *lmi;
80 list_for_each(tmp, &server_mount_info_list) {
81 lmi = list_entry(tmp, struct lustre_mount_info,
83 if (strcmp(name, lmi->lmi_name) == 0)
89 /* we must register an obd for a mount before we call the setup routine.
90 *_setup will call lustre_get_mount to get the mnt struct
91 by obd_name, since we can't pass the pointer to setup. */
92 static int server_register_mount(const char *name, struct super_block *sb)
94 struct lustre_mount_info *lmi;
100 OBD_ALLOC(lmi, sizeof(*lmi));
103 OBD_ALLOC(name_cp, strlen(name) + 1);
105 OBD_FREE(lmi, sizeof(*lmi));
108 strcpy(name_cp, name);
110 mutex_lock(&lustre_mount_info_lock);
112 if (server_find_mount(name)) {
113 mutex_unlock(&lustre_mount_info_lock);
114 OBD_FREE(lmi, sizeof(*lmi));
115 OBD_FREE(name_cp, strlen(name) + 1);
116 CERROR("Already registered %s\n", name);
119 lmi->lmi_name = name_cp;
121 list_add(&lmi->lmi_list_chain, &server_mount_info_list);
123 mutex_unlock(&lustre_mount_info_lock);
125 CDEBUG(D_MOUNT, "register mount %p from %s\n", sb, name);
130 /* when an obd no longer needs a mount */
131 static int server_deregister_mount(const char *name)
133 struct lustre_mount_info *lmi;
136 mutex_lock(&lustre_mount_info_lock);
137 lmi = server_find_mount(name);
139 mutex_unlock(&lustre_mount_info_lock);
140 CERROR("%s not registered\n", name);
144 CDEBUG(D_MOUNT, "deregister mount %p from %s\n", lmi->lmi_sb, name);
146 OBD_FREE(lmi->lmi_name, strlen(lmi->lmi_name) + 1);
147 list_del(&lmi->lmi_list_chain);
148 OBD_FREE(lmi, sizeof(*lmi));
149 mutex_unlock(&lustre_mount_info_lock);
154 /* obd's look up a registered mount using their obdname. This is just
155 for initial obd setup to find the mount struct. It should not be
156 called every time you want to mntget. */
157 struct lustre_mount_info *server_get_mount(const char *name)
159 struct lustre_mount_info *lmi;
160 struct lustre_sb_info *lsi;
163 mutex_lock(&lustre_mount_info_lock);
164 lmi = server_find_mount(name);
165 mutex_unlock(&lustre_mount_info_lock);
167 CERROR("Can't find mount for %s\n", name);
170 lsi = s2lsi(lmi->lmi_sb);
172 atomic_inc(&lsi->lsi_mounts);
174 CDEBUG(D_MOUNT, "get mount %p from %s, refs=%d\n", lmi->lmi_sb,
175 name, atomic_read(&lsi->lsi_mounts));
179 EXPORT_SYMBOL(server_get_mount);
182 * server_put_mount: to be called from obd_cleanup methods
184 * @dereg_mnt: 0 or 1 depending on whether the mount is to be deregistered or
187 * The caller decides whether server_deregister_mount() needs to be called or
188 * not. Calling of server_deregister_mount() does not depend on refcounting on
189 * lsi because we could have say the mgs and mds on the same node and we
190 * unmount the mds, then the ref on the lsi would still be non-zero but we
191 * would still want to deregister the mds mount.
193 int server_put_mount(const char *name, bool dereg_mnt)
195 struct lustre_mount_info *lmi;
196 struct lustre_sb_info *lsi;
199 mutex_lock(&lustre_mount_info_lock);
200 lmi = server_find_mount(name);
201 mutex_unlock(&lustre_mount_info_lock);
203 CERROR("Can't find mount for %s\n", name);
206 lsi = s2lsi(lmi->lmi_sb);
208 CDEBUG(D_MOUNT, "put mount %p from %s, refs=%d\n",
209 lmi->lmi_sb, name, atomic_read(&lsi->lsi_mounts));
211 if (lustre_put_lsi(lmi->lmi_sb))
212 CDEBUG(D_MOUNT, "Last put of mount %p from %s\n",
216 /* this obd should never need the mount again */
217 server_deregister_mount(name);
221 EXPORT_SYMBOL(server_put_mount);
223 /* Set up a MGS to serve startup logs */
224 static int server_start_mgs(struct super_block *sb)
226 struct lustre_sb_info *lsi = s2lsi(sb);
227 struct lustre_mount_info *lmi;
231 /* It is impossible to have more than 1 MGS per node, since
232 MGC wouldn't know which to connect to */
233 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
235 lsi = s2lsi(lmi->lmi_sb);
236 LCONSOLE_ERROR_MSG(0x15d, "The MGS service was already started"
241 CDEBUG(D_CONFIG, "Start MGS service %s\n", LUSTRE_MGS_OBDNAME);
243 rc = server_register_mount(LUSTRE_MGS_OBDNAME, sb);
246 rc = lustre_start_simple(LUSTRE_MGS_OBDNAME, LUSTRE_MGS_NAME,
247 LUSTRE_MGS_OBDNAME, NULL, NULL,
248 lsi->lsi_osd_obdname, NULL);
249 /* server_deregister_mount() is not called previously, for lsi
250 * and other stuff can't be freed cleanly when mgs calls
251 * server_put_mount() in error handling case (see b=17758),
252 * this problem is caused by a bug in mgs_init0, which forgot
253 * calling server_put_mount in error case. */
256 server_deregister_mount(LUSTRE_MGS_OBDNAME);
260 LCONSOLE_ERROR_MSG(0x15e, "Failed to start MGS '%s' (%d). "
261 "Is the 'mgs' module loaded?\n",
262 LUSTRE_MGS_OBDNAME, rc);
266 static int server_stop_mgs(struct super_block *sb)
268 struct obd_device *obd;
270 struct lustre_mount_info *lmi;
273 /* Do not stop MGS if this device is not the running MGT */
274 lmi = server_find_mount(LUSTRE_MGS_OBDNAME);
275 if (lmi != NULL && lmi->lmi_sb != sb)
278 CDEBUG(D_MOUNT, "Stop MGS service %s\n", LUSTRE_MGS_OBDNAME);
280 /* There better be only one MGS */
281 obd = class_name2obd(LUSTRE_MGS_OBDNAME);
283 CDEBUG(D_CONFIG, "mgs %s not running\n", LUSTRE_MGS_OBDNAME);
287 /* The MGS should always stop when we say so */
289 rc = class_manual_cleanup(obd);
293 /* Since there's only one mgc per node, we have to change it's fs to get
294 access to the right disk. */
295 static int server_mgc_set_fs(struct obd_device *mgc, struct super_block *sb)
297 struct lustre_sb_info *lsi = s2lsi(sb);
301 CDEBUG(D_MOUNT, "Set mgc disk for %s\n", lsi->lsi_lmd->lmd_dev);
303 /* cl_mgc_sem in mgc insures we sleep if the mgc_fs is busy */
304 rc = obd_set_info_async(NULL, mgc->obd_self_export,
305 sizeof(KEY_SET_FS), KEY_SET_FS,
306 sizeof(*sb), sb, NULL);
308 CERROR("can't set_fs %d\n", rc);
313 static int server_mgc_clear_fs(struct obd_device *mgc)
318 CDEBUG(D_MOUNT, "Unassign mgc disk\n");
320 rc = obd_set_info_async(NULL, mgc->obd_self_export,
321 sizeof(KEY_CLEAR_FS), KEY_CLEAR_FS,
326 static inline bool is_mdc_device(const char *devname)
330 ptr = strrchr(devname, '-');
331 return ptr != NULL && strcmp(ptr, "-mdc") == 0;
334 static inline bool tgt_is_mdt(const char *tgtname, __u32 *idx)
338 type = server_name2index(tgtname, idx, NULL);
340 return type == LDD_F_SV_TYPE_MDT;
344 * Convert OST/MDT name(fsname-{MDT,OST}xxxx) to a lwp name with the @idx:yyyy
345 * (fsname-MDTyyyy-lwp-{MDT,OST}xxxx)
347 int tgt_name2lwp_name(const char *tgt_name, char *lwp_name, int len, __u32 idx)
354 OBD_ALLOC(fsname, MTI_NAME_MAXLEN);
358 rc = server_name2fsname(tgt_name, fsname, &tgt);
360 CERROR("%s: failed to get fsname from tgt_name: rc = %d\n",
365 if (*tgt != '-' && *tgt != ':') {
366 CERROR("%s: invalid tgt_name name!\n", tgt_name);
367 GOTO(cleanup, rc = -EINVAL);
371 if (strncmp(tgt, "OST", 3) != 0 && strncmp(tgt, "MDT", 3) != 0) {
372 CERROR("%s is not an OST or MDT target!\n", tgt_name);
373 GOTO(cleanup, rc = -EINVAL);
375 snprintf(lwp_name, len, "%s-MDT%04x-%s-%s",
376 fsname, idx, LUSTRE_LWP_NAME, tgt);
378 GOTO(cleanup, rc = 0);
382 OBD_FREE(fsname, MTI_NAME_MAXLEN);
386 EXPORT_SYMBOL(tgt_name2lwp_name);
388 static struct list_head lwp_register_list =
389 LIST_HEAD_INIT(lwp_register_list);
390 static DEFINE_MUTEX(lwp_register_list_lock);
392 int lustre_register_lwp_item(const char *lwpname, struct obd_export **exp,
393 register_lwp_cb cb_func, void *cb_data)
395 struct obd_device *lwp;
396 struct lwp_register_item *lri;
399 LASSERTF(strlen(lwpname) < MTI_NAME_MAXLEN, "lwpname is too long %s\n",
401 LASSERT(exp != NULL && *exp == NULL);
407 mutex_lock(&lwp_register_list_lock);
409 lwp = class_name2obd(lwpname);
410 if (lwp != NULL && lwp->obd_set_up == 1) {
411 struct obd_uuid *uuid;
415 mutex_unlock(&lwp_register_list_lock);
419 memcpy(uuid->uuid, lwpname, strlen(lwpname));
420 *exp = cfs_hash_lookup(lwp->obd_uuid_hash, uuid);
424 memcpy(lri->lri_name, lwpname, strlen(lwpname));
426 lri->lri_cb_func = cb_func;
427 lri->lri_cb_data = cb_data;
428 INIT_LIST_HEAD(&lri->lri_list);
429 list_add(&lri->lri_list, &lwp_register_list);
431 if (*exp != NULL && cb_func != NULL)
434 mutex_unlock(&lwp_register_list_lock);
437 EXPORT_SYMBOL(lustre_register_lwp_item);
439 void lustre_deregister_lwp_item(struct obd_export **exp)
441 struct lwp_register_item *lri, *tmp;
443 mutex_lock(&lwp_register_list_lock);
444 list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
445 if (exp == lri->lri_exp) {
447 class_export_put(*exp);
448 list_del(&lri->lri_list);
453 mutex_unlock(&lwp_register_list_lock);
455 EXPORT_SYMBOL(lustre_deregister_lwp_item);
457 struct obd_export *lustre_find_lwp_by_index(const char *dev, __u32 idx)
459 struct lustre_mount_info *lmi;
460 struct lustre_sb_info *lsi;
461 struct obd_device *lwp;
462 struct obd_export *exp = NULL;
467 lmi = server_get_mount(dev);
471 lsi = s2lsi(lmi->lmi_sb);
472 rc = server_name2fsname(lsi->lsi_svname, fsname, NULL);
474 CERROR("%s: failed to get fsname: rc = %d\n",
475 lsi->lsi_svname, rc);
479 snprintf(lwp_name, sizeof(lwp_name), "%s-MDT%04x", fsname, idx);
480 spin_lock(&lsi->lsi_lwp_lock);
481 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
482 char *ptr = strstr(lwp->obd_name, lwp_name);
484 if (ptr != NULL && lwp->obd_lwp_export != NULL) {
485 exp = class_export_get(lwp->obd_lwp_export);
489 spin_unlock(&lsi->lsi_lwp_lock);
492 server_put_mount(dev, false);
496 EXPORT_SYMBOL(lustre_find_lwp_by_index);
498 void lustre_notify_lwp_list(struct obd_export *exp)
500 struct lwp_register_item *lri, *tmp;
501 LASSERT(exp != NULL);
503 mutex_lock(&lwp_register_list_lock);
504 list_for_each_entry_safe(lri, tmp, &lwp_register_list, lri_list) {
505 if (strcmp(exp->exp_obd->obd_name, lri->lri_name))
507 if (*lri->lri_exp != NULL)
509 *lri->lri_exp = class_export_get(exp);
510 if (lri->lri_cb_func != NULL)
511 lri->lri_cb_func(lri->lri_cb_data);
513 mutex_unlock(&lwp_register_list_lock);
515 EXPORT_SYMBOL(lustre_notify_lwp_list);
517 static int lustre_lwp_connect(struct obd_device *lwp)
520 struct lu_context session_ctx;
521 struct obd_export *exp;
522 struct obd_uuid *uuid = NULL;
523 struct obd_connect_data *data = NULL;
527 /* log has been fully processed, let clients connect */
528 rc = lu_env_init(&env, lwp->obd_lu_dev->ld_type->ldt_ctx_tags);
532 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
533 session_ctx.lc_thread = NULL;
534 lu_context_enter(&session_ctx);
535 env.le_ses = &session_ctx;
539 GOTO(out, rc = -ENOMEM);
541 data->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_INDEX;
542 data->ocd_version = LUSTRE_VERSION_CODE;
543 data->ocd_connect_flags |= OBD_CONNECT_MDS_MDS | OBD_CONNECT_FID |
544 OBD_CONNECT_AT | OBD_CONNECT_LRU_RESIZE |
545 OBD_CONNECT_FULL20 | OBD_CONNECT_LVB_TYPE |
546 OBD_CONNECT_LIGHTWEIGHT | OBD_CONNECT_LFSCK |
547 OBD_CONNECT_BULK_MBITS;
550 GOTO(out, rc = -ENOMEM);
552 if (strlen(lwp->obd_name) > sizeof(uuid->uuid)) {
553 CERROR("%s: Too long lwp name %s, max_size is %d\n",
554 lwp->obd_name, lwp->obd_name, (int)sizeof(uuid->uuid));
555 GOTO(out, rc = -EINVAL);
558 /* Use lwp name as the uuid, so we find the export by lwp name later */
559 memcpy(uuid->uuid, lwp->obd_name, strlen(lwp->obd_name));
560 rc = obd_connect(&env, &exp, lwp, uuid, data, NULL);
562 CERROR("%s: connect failed: rc = %d\n", lwp->obd_name, rc);
564 if (unlikely(lwp->obd_lwp_export != NULL))
565 class_export_put(lwp->obd_lwp_export);
566 lwp->obd_lwp_export = class_export_get(exp);
578 lu_context_exit(&session_ctx);
579 lu_context_fini(&session_ctx);
585 * lwp is used by slaves (Non-MDT0 targets) to manage the connection to MDT0,
586 * or from the OSTx to MDTy.
588 static int lustre_lwp_setup(struct lustre_cfg *lcfg, struct lustre_sb_info *lsi,
591 struct obd_device *obd;
592 char *lwpname = NULL;
593 char *lwpuuid = NULL;
597 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
600 CERROR("%s: Can't add uuid: rc =%d\n", lsi->lsi_svname, rc);
604 OBD_ALLOC(lwpname, MTI_NAME_MAXLEN);
606 GOTO(out, rc = -ENOMEM);
608 rc = tgt_name2lwp_name(lsi->lsi_svname, lwpname, MTI_NAME_MAXLEN, idx);
610 CERROR("%s: failed to generate lwp name: rc = %d\n",
611 lsi->lsi_svname, rc);
615 OBD_ALLOC(lwpuuid, MTI_NAME_MAXLEN);
617 GOTO(out, rc = -ENOMEM);
619 sprintf(lwpuuid, "%s_UUID", lwpname);
620 rc = lustre_start_simple(lwpname, LUSTRE_LWP_NAME,
621 lwpuuid, lustre_cfg_string(lcfg, 1),
624 CERROR("%s: setup up failed: rc %d\n", lwpname, rc);
628 obd = class_name2obd(lwpname);
629 LASSERT(obd != NULL);
631 rc = lustre_lwp_connect(obd);
633 obd->u.cli.cl_max_mds_easize = MAX_MD_SIZE;
634 spin_lock(&lsi->lsi_lwp_lock);
635 list_add_tail(&obd->obd_lwp_list, &lsi->lsi_lwp_list);
636 spin_unlock(&lsi->lsi_lwp_lock);
638 CERROR("%s: connect failed: rc = %d\n", lwpname, rc);
645 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
647 OBD_FREE(lwpuuid, MTI_NAME_MAXLEN);
652 /* the caller is responsible for memory free */
653 static struct obd_device *lustre_find_lwp(struct lustre_sb_info *lsi,
654 char **lwpname, __u32 idx)
656 struct obd_device *lwp;
660 LASSERT(lwpname != NULL);
661 LASSERT(IS_OST(lsi) || IS_MDT(lsi));
663 OBD_ALLOC(*lwpname, MTI_NAME_MAXLEN);
664 if (*lwpname == NULL)
665 RETURN(ERR_PTR(-ENOMEM));
667 rc = tgt_name2lwp_name(lsi->lsi_svname, *lwpname, MTI_NAME_MAXLEN, idx);
669 CERROR("%s: failed to generate lwp name: rc = %d\n",
670 lsi->lsi_svname, rc);
671 GOTO(out, rc = -EINVAL);
674 lwp = class_name2obd(*lwpname);
678 if (*lwpname != NULL) {
679 OBD_FREE(*lwpname, MTI_NAME_MAXLEN);
685 RETURN(lwp != NULL ? lwp : ERR_PTR(-ENOENT));
688 static int lustre_lwp_add_conn(struct lustre_cfg *cfg,
689 struct lustre_sb_info *lsi, __u32 idx)
691 struct lustre_cfg_bufs *bufs = NULL;
692 struct lustre_cfg *lcfg = NULL;
693 char *lwpname = NULL;
694 struct obd_device *lwp;
698 lwp = lustre_find_lwp(lsi, &lwpname, idx);
700 CERROR("%s: can't find lwp device.\n", lsi->lsi_svname);
701 GOTO(out, rc = PTR_ERR(lwp));
703 LASSERT(lwpname != NULL);
707 GOTO(out, rc = -ENOMEM);
709 lustre_cfg_bufs_reset(bufs, lwpname);
710 lustre_cfg_bufs_set_string(bufs, 1,
711 lustre_cfg_string(cfg, 1));
713 lcfg = lustre_cfg_new(LCFG_ADD_CONN, bufs);
715 GOTO(out_cfg, rc = -ENOMEM);
716 rc = class_add_conn(lwp, lcfg);
718 CERROR("%s: can't add conn: rc = %d\n", lwpname, rc);
721 lustre_cfg_free(lcfg);
727 OBD_FREE(lwpname, MTI_NAME_MAXLEN);
732 * Retrieve MDT nids from the client log, then start the lwp device.
733 * there are only two scenarios which would include mdt nid.
735 * marker 5 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxx-
736 * add_uuid nid=192.168.122.162@tcp(0x20000c0a87aa2) 0: 1:192.168.122.162@tcp
737 * attach 0:lustre-MDTyyyy-mdc 1:mdc 2:lustre-clilmv_UUID
738 * setup 0:lustre-MDTyyyy-mdc 1:lustre-MDTyyyy_UUID 2:192.168.122.162@tcp
739 * add_uuid nid=192.168.172.1@tcp(0x20000c0a8ac01) 0: 1:192.168.172.1@tcp
740 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.172.1@tcp
741 * modify_mdc_tgts add 0:lustre-clilmv 1:lustre-MDTyyyy_UUID xxxx
742 * marker 5 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add mdc' xxxx-
744 * marker 7 (flags=0x01, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
745 * add_uuid nid=192.168.122.2@tcp(0x20000c0a87a02) 0: 1:192.168.122.2@tcp
746 * add_conn 0:lustre-MDTyyyy-mdc 1:192.168.122.2@tcp
747 * marker 7 (flags=0x02, v2.1.54.0) lustre-MDTyyyy 'add failnid' xxxx-
749 static int client_lwp_config_process(const struct lu_env *env,
750 struct llog_handle *handle,
751 struct llog_rec_hdr *rec, void *data)
753 struct config_llog_instance *clli = data;
754 int cfg_len = rec->lrh_len;
755 char *cfg_buf = (char *) (rec + 1);
756 struct lustre_cfg *lcfg = NULL;
757 struct lustre_sb_info *lsi;
758 int rc = 0, swab = 0;
761 if (rec->lrh_type != OBD_CFG_REC) {
762 CERROR("Unknown llog record type %#x encountered\n",
767 LASSERT(clli->cfg_sb != NULL);
768 lsi = s2lsi(clli->cfg_sb);
770 lcfg = (struct lustre_cfg *)cfg_buf;
771 if (lcfg->lcfg_version == __swab32(LUSTRE_CFG_VERSION)) {
772 lustre_swab_lustre_cfg(lcfg);
776 rc = lustre_cfg_sanity_check(cfg_buf, cfg_len);
780 switch (lcfg->lcfg_command) {
782 struct cfg_marker *marker = lustre_cfg_buf(lcfg, 1);
784 lustre_swab_cfg_marker(marker, swab,
785 LUSTRE_CFG_BUFLEN(lcfg, 1));
786 if (marker->cm_flags & CM_SKIP ||
787 marker->cm_flags & CM_EXCLUDE)
790 if (!tgt_is_mdt(marker->cm_tgtname, &clli->cfg_lwp_idx))
793 if (IS_MDT(lsi) && clli->cfg_lwp_idx != 0)
796 if (!strncmp(marker->cm_comment, "add mdc", 7) ||
797 !strncmp(marker->cm_comment, "add failnid", 11)) {
798 if (marker->cm_flags & CM_START) {
799 clli->cfg_flags = CFG_F_MARKER;
800 /* This hack is to differentiate the
801 * ADD_UUID is come from "add mdc" record
802 * or from "add failnid" record. */
803 if (!strncmp(marker->cm_comment,
805 clli->cfg_flags |= CFG_F_SKIP;
806 } else if (marker->cm_flags & CM_END) {
812 case LCFG_ADD_UUID: {
813 if (clli->cfg_flags == CFG_F_MARKER) {
814 rc = lustre_lwp_setup(lcfg, lsi, clli->cfg_lwp_idx);
815 /* XXX: process only the first nid as
816 * we don't need another instance of lwp */
817 clli->cfg_flags |= CFG_F_SKIP;
818 } else if (clli->cfg_flags == (CFG_F_MARKER | CFG_F_SKIP)) {
819 rc = class_add_uuid(lustre_cfg_string(lcfg, 1),
822 CERROR("%s: Fail to add uuid, rc:%d\n",
823 lsi->lsi_svname, rc);
827 case LCFG_ADD_CONN: {
828 char *devname = lustre_cfg_string(lcfg, 0);
832 if (!is_mdc_device(devname))
835 ptr = strrchr(devname, '-');
840 if (!tgt_is_mdt(devname, &idx)) {
846 if (IS_MDT(lsi) && idx != 0)
849 rc = lustre_lwp_add_conn(lcfg, lsi, idx);
859 static int lustre_disconnect_lwp(struct super_block *sb)
861 struct lustre_sb_info *lsi = s2lsi(sb);
862 struct obd_device *lwp;
863 char *logname = NULL;
864 struct lustre_cfg_bufs *bufs = NULL;
865 struct config_llog_instance *cfg = NULL;
870 if (likely(lsi->lsi_lwp_started)) {
871 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
875 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
877 CERROR("%s: failed to get fsname from svname: "
878 "rc = %d\n", lsi->lsi_svname, rc);
879 GOTO(out, rc = -EINVAL);
882 strcat(logname, "-client");
885 GOTO(out, rc = -ENOMEM);
888 cfg->cfg_instance = sb;
889 rc = lustre_end_log(sb, logname, cfg);
890 if (rc != 0 && rc != -ENOENT)
893 lsi->lsi_lwp_started = 0;
898 GOTO(out, rc = -ENOMEM);
900 list_for_each_entry(lwp, &lsi->lsi_lwp_list, obd_lwp_list) {
901 struct lustre_cfg *lcfg;
903 if (likely(lwp->obd_lwp_export != NULL)) {
904 class_export_put(lwp->obd_lwp_export);
905 lwp->obd_lwp_export = NULL;
908 lustre_cfg_bufs_reset(bufs, lwp->obd_name);
909 lustre_cfg_bufs_set_string(bufs, 1, NULL);
910 lcfg = lustre_cfg_new(LCFG_CLEANUP, bufs);
912 GOTO(out, rc = -ENOMEM);
914 /* Disconnect import first. NULL is passed for the '@env',
915 * since it will not be used. */
916 rc = lwp->obd_lu_dev->ld_ops->ldo_process_config(NULL,
917 lwp->obd_lu_dev, lcfg);
918 lustre_cfg_free(lcfg);
919 if (rc != 0 && rc != -ETIMEDOUT) {
920 CERROR("%s: fail to disconnect LWP: rc = %d\n",
934 OBD_FREE(logname, MTI_NAME_MAXLEN);
936 return rc1 != 0 ? rc1 : rc;
940 * Stop the lwp for an OST/MDT target.
942 static int lustre_stop_lwp(struct super_block *sb)
944 struct lustre_sb_info *lsi = s2lsi(sb);
945 struct obd_device *lwp;
950 while (!list_empty(&lsi->lsi_lwp_list)) {
951 lwp = list_entry(lsi->lsi_lwp_list.next, struct obd_device,
953 list_del_init(&lwp->obd_lwp_list);
955 rc = class_manual_cleanup(lwp);
957 CERROR("%s: fail to stop LWP: rc = %d\n",
963 RETURN(rc1 != 0 ? rc1 : rc);
967 * Start the lwp(fsname-MDTyyyy-lwp-{MDT,OST}xxxx) for a MDT/OST or MDT target.
969 static int lustre_start_lwp(struct super_block *sb)
971 struct lustre_sb_info *lsi = s2lsi(sb);
972 struct config_llog_instance *cfg = NULL;
977 if (unlikely(lsi->lsi_lwp_started))
980 OBD_ALLOC(logname, MTI_NAME_MAXLEN);
984 rc = server_name2fsname(lsi->lsi_svname, logname, NULL);
986 CERROR("%s: failed to get fsname from svname: rc = %d\n",
987 lsi->lsi_svname, rc);
988 GOTO(out, rc = -EINVAL);
991 strcat(logname, "-client");
994 GOTO(out, rc = -ENOMEM);
996 cfg->cfg_callback = client_lwp_config_process;
997 cfg->cfg_instance = sb;
998 rc = lustre_process_log(sb, logname, cfg);
999 /* need to remove config llog from mgc */
1000 lsi->lsi_lwp_started = 1;
1005 OBD_FREE(logname, MTI_NAME_MAXLEN);
1012 static DEFINE_MUTEX(server_start_lock);
1014 /* Stop MDS/OSS if nobody is using them */
1015 static int server_stop_servers(int lsiflags)
1017 struct obd_device *obd = NULL;
1018 struct obd_type *type = NULL;
1022 mutex_lock(&server_start_lock);
1024 /* Either an MDT or an OST or neither */
1025 /* if this was an MDT, and there are no more MDT's, clean up the MDS */
1026 if (lsiflags & LDD_F_SV_TYPE_MDT) {
1027 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1029 type = class_search_type(LUSTRE_MDT_NAME);
1032 /* if this was an OST, and there are no more OST's, clean up the OSS */
1033 if (lsiflags & LDD_F_SV_TYPE_OST) {
1034 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1036 type = class_search_type(LUSTRE_OST_NAME);
1039 if (obd != NULL && (type == NULL || type->typ_refcnt == 0)) {
1041 /* obd_fail doesn't mean much on a server obd */
1042 rc = class_manual_cleanup(obd);
1045 mutex_unlock(&server_start_lock);
1050 int server_mti_print(const char *title, struct mgs_target_info *mti)
1052 PRINT_CMD(PRINT_MASK, "mti %s\n", title);
1053 PRINT_CMD(PRINT_MASK, "server: %s\n", mti->mti_svname);
1054 PRINT_CMD(PRINT_MASK, "fs: %s\n", mti->mti_fsname);
1055 PRINT_CMD(PRINT_MASK, "uuid: %s\n", mti->mti_uuid);
1056 PRINT_CMD(PRINT_MASK, "ver: %d flags: %#x\n",
1057 mti->mti_config_ver, mti->mti_flags);
1061 /* Generate data for registration */
1062 static int server_lsi2mti(struct lustre_sb_info *lsi,
1063 struct mgs_target_info *mti)
1065 lnet_process_id_t id;
1070 if (!IS_SERVER(lsi))
1073 if (strlcpy(mti->mti_svname, lsi->lsi_svname, sizeof(mti->mti_svname))
1074 >= sizeof(mti->mti_svname))
1077 mti->mti_nid_count = 0;
1078 while (LNetGetId(i++, &id) != -ENOENT) {
1079 if (LNET_NETTYP(LNET_NIDNET(id.nid)) == LOLND)
1082 /* server use --servicenode param, only allow specified
1083 * nids be registered */
1084 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) != 0 &&
1085 class_match_nid(lsi->lsi_lmd->lmd_params,
1086 PARAM_FAILNODE, id.nid) < 1)
1089 /* match specified network */
1090 if (!class_match_net(lsi->lsi_lmd->lmd_params,
1091 PARAM_NETWORK, LNET_NIDNET(id.nid)))
1094 mti->mti_nids[mti->mti_nid_count] = id.nid;
1095 mti->mti_nid_count++;
1096 if (mti->mti_nid_count >= MTI_NIDS_MAX) {
1097 CWARN("Only using first %d nids for %s\n",
1098 mti->mti_nid_count, mti->mti_svname);
1103 mti->mti_lustre_ver = LUSTRE_VERSION_CODE;
1104 mti->mti_config_ver = 0;
1106 rc = server_name2fsname(lsi->lsi_svname, mti->mti_fsname, NULL);
1110 rc = server_name2index(lsi->lsi_svname, &mti->mti_stripe_index, NULL);
1113 /* Orion requires index to be set */
1114 LASSERT(!(rc & LDD_F_NEED_INDEX));
1115 /* keep only LDD flags */
1116 mti->mti_flags = lsi->lsi_flags & LDD_F_MASK;
1117 if (mti->mti_flags & (LDD_F_WRITECONF | LDD_F_VIRGIN))
1118 mti->mti_flags |= LDD_F_UPDATE;
1119 cplen = strlcpy(mti->mti_params, lsi->lsi_lmd->lmd_params,
1120 sizeof(mti->mti_params));
1121 if (cplen >= sizeof(mti->mti_params))
1126 /* Register an old or new target with the MGS. If needed MGS will construct
1127 startup logs and assign index */
1128 static int server_register_target(struct lustre_sb_info *lsi)
1130 struct obd_device *mgc = lsi->lsi_mgc;
1131 struct mgs_target_info *mti = NULL;
1138 if (!IS_SERVER(lsi))
1145 rc = server_lsi2mti(lsi, mti);
1149 CDEBUG(D_MOUNT, "Registration %s, fs=%s, %s, index=%04x, flags=%#x\n",
1150 mti->mti_svname, mti->mti_fsname,
1151 libcfs_nid2str(mti->mti_nids[0]), mti->mti_stripe_index,
1154 /* if write_conf is true, the registration must succeed */
1155 writeconf = !!(lsi->lsi_flags & (LDD_F_NEED_INDEX | LDD_F_UPDATE));
1156 mti->mti_flags |= LDD_F_OPC_REG;
1158 /* Register the target */
1159 /* FIXME use mgc_process_config instead */
1160 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1161 sizeof(KEY_REGISTER_TARGET),
1162 KEY_REGISTER_TARGET,
1163 sizeof(*mti), mti, NULL);
1165 if (mti->mti_flags & LDD_F_ERROR) {
1166 LCONSOLE_ERROR_MSG(0x160,
1167 "%s: the MGS refuses to allow this server "
1168 "to start: rc = %d. Please see messages on "
1169 "the MGS.\n", lsi->lsi_svname, rc);
1170 } else if (writeconf) {
1171 LCONSOLE_ERROR_MSG(0x15f,
1172 "%s: cannot register this server with the MGS: "
1173 "rc = %d. Is the MGS running?\n",
1174 lsi->lsi_svname, rc);
1176 CDEBUG(D_HA, "%s: error registering with the MGS: "
1177 "rc = %d (not fatal)\n", lsi->lsi_svname, rc);
1178 /* reset the error code for non-fatal error. */
1191 * Notify the MGS that this target is ready.
1192 * Used by IR - if the MGS receives this message, it will notify clients.
1194 static int server_notify_target(struct super_block *sb, struct obd_device *obd)
1196 struct lustre_sb_info *lsi = s2lsi(sb);
1197 struct obd_device *mgc = lsi->lsi_mgc;
1198 struct mgs_target_info *mti = NULL;
1204 if (!(IS_SERVER(lsi)))
1210 rc = server_lsi2mti(lsi, mti);
1214 mti->mti_instance = obd->u.obt.obt_instance;
1215 mti->mti_flags |= LDD_F_OPC_READY;
1217 /* FIXME use mgc_process_config instead */
1218 rc = obd_set_info_async(NULL, mgc->u.cli.cl_mgc_mgsexp,
1219 sizeof(KEY_REGISTER_TARGET),
1220 KEY_REGISTER_TARGET,
1221 sizeof(*mti), mti, NULL);
1223 /* Imperative recovery: if the mgs informs us to use IR? */
1224 if (!rc && !(mti->mti_flags & LDD_F_ERROR) &&
1225 (mti->mti_flags & LDD_F_IR_CAPABLE))
1226 lsi->lsi_flags |= LDD_F_IR_CAPABLE;
1235 /** Start server targets: MDTs and OSTs
1237 static int server_start_targets(struct super_block *sb)
1239 struct obd_device *obd;
1240 struct lustre_sb_info *lsi = s2lsi(sb);
1241 struct config_llog_instance cfg;
1243 struct lu_device *dev;
1247 CDEBUG(D_MOUNT, "starting target %s\n", lsi->lsi_svname);
1250 /* make sure the MDS is started */
1251 mutex_lock(&server_start_lock);
1252 obd = class_name2obd(LUSTRE_MDS_OBDNAME);
1254 rc = lustre_start_simple(LUSTRE_MDS_OBDNAME,
1256 LUSTRE_MDS_OBDNAME"_uuid",
1257 NULL, NULL, NULL, NULL);
1259 mutex_unlock(&server_start_lock);
1260 CERROR("failed to start MDS: %d\n", rc);
1264 mutex_unlock(&server_start_lock);
1267 /* If we're an OST, make sure the global OSS is running */
1269 /* make sure OSS is started */
1270 mutex_lock(&server_start_lock);
1271 obd = class_name2obd(LUSTRE_OSS_OBDNAME);
1273 rc = lustre_start_simple(LUSTRE_OSS_OBDNAME,
1275 LUSTRE_OSS_OBDNAME"_uuid",
1276 NULL, NULL, NULL, NULL);
1278 mutex_unlock(&server_start_lock);
1279 CERROR("failed to start OSS: %d\n", rc);
1283 mutex_unlock(&server_start_lock);
1286 /* Set the mgc fs to our server disk. This allows the MGC to
1287 * read and write configs locally, in case it can't talk to the MGS. */
1288 rc = server_mgc_set_fs(lsi->lsi_mgc, sb);
1290 GOTO(out_stop_service, rc);
1292 /* Register with MGS */
1293 rc = server_register_target(lsi);
1297 /* Let the target look up the mount using the target's name
1298 (we can't pass the sb or mnt through class_process_config.) */
1299 rc = server_register_mount(lsi->lsi_svname, sb);
1303 /* Start targets using the llog named for the target */
1304 memset(&cfg, 0, sizeof(cfg));
1305 cfg.cfg_callback = class_config_llog_handler;
1306 rc = lustre_process_log(sb, lsi->lsi_svname, &cfg);
1308 CERROR("failed to start server %s: %d\n",
1309 lsi->lsi_svname, rc);
1310 /* Do NOT call server_deregister_mount() here. This makes it
1311 * impossible to find mount later in cleanup time and leaves
1312 * @lsi and othder stuff leaked. -umka */
1316 obd = class_name2obd(lsi->lsi_svname);
1318 CERROR("no server named %s was started\n", lsi->lsi_svname);
1319 GOTO(out_mgc, rc = -ENXIO);
1322 if (IS_OST(lsi) || IS_MDT(lsi)) {
1323 rc = lustre_start_lwp(sb);
1325 CERROR("%s: failed to start LWP: %d\n",
1326 lsi->lsi_svname, rc);
1331 server_notify_target(sb, obd);
1333 /* calculate recovery timeout, do it after lustre_process_log */
1334 server_calc_timeout(lsi, obd);
1336 /* log has been fully processed */
1337 obd_notify(obd, NULL, OBD_NOTIFY_CONFIG, (void *)CONFIG_LOG);
1339 /* log has been fully processed, let clients connect */
1340 dev = obd->obd_lu_dev;
1341 if (dev && dev->ld_ops->ldo_prepare) {
1342 rc = lu_env_init(&env, dev->ld_type->ldt_ctx_tags);
1344 struct lu_context session_ctx;
1346 lu_context_init(&session_ctx, LCT_SERVER_SESSION);
1347 session_ctx.lc_thread = NULL;
1348 lu_context_enter(&session_ctx);
1349 env.le_ses = &session_ctx;
1351 rc = dev->ld_ops->ldo_prepare(&env, NULL, dev);
1354 lu_context_exit(&session_ctx);
1355 lu_context_fini(&session_ctx);
1359 /* abort recovery only on the complete stack:
1360 * many devices can be involved */
1361 if ((lsi->lsi_lmd->lmd_flags & LMD_FLG_ABORT_RECOV) &&
1362 (OBP(obd, iocontrol))) {
1363 obd_iocontrol(OBD_IOC_ABORT_RECOVERY, obd->obd_self_export, 0,
1368 /* Release the mgc fs for others to use */
1369 server_mgc_clear_fs(lsi->lsi_mgc);
1373 server_stop_servers(lsi->lsi_flags);
1378 static int lsi_prepare(struct lustre_sb_info *lsi)
1380 const char *osd_type;
1387 LASSERT(lsi->lsi_lmd);
1389 /* The server name is given as a mount line option */
1390 if (lsi->lsi_lmd->lmd_profile == NULL) {
1391 LCONSOLE_ERROR("Can't determine server name\n");
1395 /* Determine osd type */
1396 if (lsi->lsi_lmd->lmd_osd_type == NULL) {
1397 osd_type = LUSTRE_OSD_LDISKFS_NAME;
1400 osd_type = lsi->lsi_lmd->lmd_osd_type;
1401 fstype = lsi->lsi_lmd->lmd_osd_type;
1404 if (strlen(lsi->lsi_lmd->lmd_profile) >= sizeof(lsi->lsi_svname) ||
1405 strlen(osd_type) >= sizeof(lsi->lsi_osd_type) ||
1406 strlen(fstype) >= sizeof(lsi->lsi_fstype))
1407 RETURN(-ENAMETOOLONG);
1409 strlcpy(lsi->lsi_svname, lsi->lsi_lmd->lmd_profile,
1410 sizeof(lsi->lsi_svname));
1411 strlcpy(lsi->lsi_osd_type, osd_type, sizeof(lsi->lsi_osd_type));
1412 /* XXX: a temp. solution for components using ldiskfs
1413 * to be removed in one of the subsequent patches */
1414 strlcpy(lsi->lsi_fstype, fstype, sizeof(lsi->lsi_fstype));
1416 /* Determine server type */
1417 rc = server_name2index(lsi->lsi_svname, &index, NULL);
1419 if (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) {
1420 /* Assume we're a bare MGS */
1422 lsi->lsi_lmd->lmd_flags |= LMD_FLG_NOSVC;
1424 LCONSOLE_ERROR("Can't determine server type of '%s'\n",
1429 lsi->lsi_flags |= rc;
1431 /* Add mount line flags that used to be in ldd:
1432 * writeconf, mgs, anything else?
1434 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_WRITECONF) ?
1435 LDD_F_WRITECONF : 0;
1436 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_VIRGIN) ?
1438 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_UPDATE) ?
1440 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_MGS) ?
1441 LDD_F_SV_TYPE_MGS : 0;
1442 lsi->lsi_flags |= (lsi->lsi_lmd->lmd_flags & LMD_FLG_NO_PRIMNODE) ?
1443 LDD_F_NO_PRIMNODE : 0;
1448 /*************** server mount ******************/
1450 /** Start the shutdown of servers at umount.
1452 static void server_put_super(struct super_block *sb)
1454 struct lustre_sb_info *lsi = s2lsi(sb);
1455 struct obd_device *obd;
1456 char *tmpname, *extraname = NULL;
1458 int lsiflags = lsi->lsi_flags;
1461 LASSERT(IS_SERVER(lsi));
1463 tmpname_sz = strlen(lsi->lsi_svname) + 1;
1464 OBD_ALLOC(tmpname, tmpname_sz);
1465 memcpy(tmpname, lsi->lsi_svname, tmpname_sz);
1466 CDEBUG(D_MOUNT, "server put_super %s\n", tmpname);
1467 if (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC))
1468 snprintf(tmpname, tmpname_sz, "MGS");
1470 /* disconnect the lwp first to drain off the inflight request */
1471 if (IS_OST(lsi) || IS_MDT(lsi)) {
1474 rc = lustre_disconnect_lwp(sb);
1475 if (rc != 0 && rc != -ETIMEDOUT &&
1476 rc != -ENOTCONN && rc != -ESHUTDOWN)
1477 CWARN("%s: failed to disconnect lwp: rc= %d\n",
1481 /* Stop the target */
1482 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1483 (IS_MDT(lsi) || IS_OST(lsi))) {
1484 struct lustre_profile *lprof = NULL;
1486 /* tell the mgc to drop the config log */
1487 lustre_end_log(sb, lsi->lsi_svname, NULL);
1489 /* COMPAT_146 - profile may get deleted in mgc_cleanup.
1490 If there are any setup/cleanup errors, save the lov
1491 name for safety cleanup later. */
1492 lprof = class_get_profile(lsi->lsi_svname);
1493 if (lprof != NULL) {
1494 if (lprof->lp_dt != NULL) {
1495 OBD_ALLOC(extraname, strlen(lprof->lp_dt) + 1);
1496 strncpy(extraname, lprof->lp_dt,
1497 strlen(lprof->lp_dt) + 1);
1499 class_put_profile(lprof);
1502 obd = class_name2obd(lsi->lsi_svname);
1504 CDEBUG(D_MOUNT, "stopping %s\n", obd->obd_name);
1505 if (lsiflags & LSI_UMOUNT_FAILOVER)
1507 /* We can't seem to give an error return code
1508 * to .put_super, so we better make sure we clean up! */
1510 class_manual_cleanup(obd);
1512 CERROR("no obd %s\n", lsi->lsi_svname);
1513 server_deregister_mount(lsi->lsi_svname);
1517 /* If they wanted the mgs to stop separately from the mdt, they
1518 should have put it on a different device. */
1520 /* if MDS start with --nomgs, don't stop MGS then */
1521 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS))
1522 server_stop_mgs(sb);
1525 if (IS_OST(lsi) || IS_MDT(lsi)) {
1526 if (lustre_stop_lwp(sb) < 0)
1527 CERROR("%s: failed to stop lwp!\n", tmpname);
1530 /* Clean the mgc and sb */
1531 lustre_common_put_super(sb);
1533 /* wait till all in-progress cleanups are done
1534 * specifically we're interested in ofd cleanup
1536 obd_zombie_barrier();
1538 /* Stop the servers (MDS, OSS) if no longer needed. We must wait
1539 until the target is really gone so that our type refcount check
1541 server_stop_servers(lsiflags);
1543 /* In case of startup or cleanup err, stop related obds */
1545 obd = class_name2obd(extraname);
1547 CWARN("Cleaning orphaned obd %s\n", extraname);
1549 class_manual_cleanup(obd);
1551 OBD_FREE(extraname, strlen(extraname) + 1);
1554 LCONSOLE_WARN("server umount %s complete\n", tmpname);
1555 OBD_FREE(tmpname, tmpname_sz);
1559 /** Called only for 'umount -f'
1561 static void server_umount_begin(struct super_block *sb)
1563 struct lustre_sb_info *lsi = s2lsi(sb);
1566 CDEBUG(D_MOUNT, "umount -f\n");
1567 /* umount = failover
1569 no third way to do non-force, non-failover */
1570 lsi->lsi_flags &= ~LSI_UMOUNT_FAILOVER;
1574 static int server_statfs(struct dentry *dentry, struct kstatfs *buf)
1576 struct super_block *sb = dentry->d_sb;
1577 struct lustre_sb_info *lsi = s2lsi(sb);
1578 struct obd_statfs statfs;
1582 if (lsi->lsi_dt_dev) {
1583 rc = dt_statfs(NULL, lsi->lsi_dt_dev, &statfs);
1585 statfs_unpack(buf, &statfs);
1586 buf->f_type = sb->s_magic;
1592 buf->f_type = sb->s_magic;
1593 buf->f_bsize = sb->s_blocksize;
1599 buf->f_namelen = NAME_MAX;
1603 /** The operations we support directly on the superblock:
1604 * mount, umount, and df.
1606 static struct super_operations server_ops = {
1607 .put_super = server_put_super,
1608 .umount_begin = server_umount_begin, /* umount -f */
1609 .statfs = server_statfs,
1613 * Xattr support for Lustre servers
1615 static ssize_t lustre_getxattr(struct dentry *dentry, const char *name,
1616 void *buffer, size_t size)
1618 if (!selinux_is_enabled())
1623 static int lustre_setxattr(struct dentry *dentry, const char *name,
1624 const void *value, size_t size, int flags)
1629 static ssize_t lustre_listxattr(struct dentry *d_entry, char *name,
1635 static const struct inode_operations server_inode_operations = {
1636 .setxattr = lustre_setxattr,
1637 .getxattr = lustre_getxattr,
1638 .listxattr = lustre_listxattr,
1641 #define log2(n) ffz(~(n))
1642 #define LUSTRE_SUPER_MAGIC 0x0BD00BD1
1644 static int server_fill_super_common(struct super_block *sb)
1646 struct inode *root = NULL;
1649 CDEBUG(D_MOUNT, "Server sb, dev=%d\n", (int)sb->s_dev);
1651 sb->s_blocksize = 4096;
1652 sb->s_blocksize_bits = log2(sb->s_blocksize);
1653 sb->s_magic = LUSTRE_SUPER_MAGIC;
1654 sb->s_maxbytes = 0; /* we don't allow file IO on server mountpoints */
1655 sb->s_flags |= MS_RDONLY;
1656 sb->s_op = &server_ops;
1658 root = new_inode(sb);
1660 CERROR("Can't make root inode\n");
1664 /* returns -EIO for every operation */
1665 /* make_bad_inode(root); -- badness - can't umount */
1666 /* apparently we need to be a directory for the mount to finish */
1667 root->i_mode = S_IFDIR;
1668 root->i_op = &server_inode_operations;
1669 sb->s_root = d_make_root(root);
1671 CERROR("%s: can't make root dentry\n", sb->s_id);
1678 static int osd_start(struct lustre_sb_info *lsi, unsigned long mflags)
1680 struct lustre_mount_data *lmd = lsi->lsi_lmd;
1681 struct obd_device *obd;
1682 struct dt_device_param p;
1688 "Attempting to start %s, type=%s, lsifl=%x, mountfl=%lx\n",
1689 lsi->lsi_svname, lsi->lsi_osd_type, lsi->lsi_flags, mflags);
1691 sprintf(lsi->lsi_osd_obdname, "%s-osd", lsi->lsi_svname);
1692 strcpy(lsi->lsi_osd_uuid, lsi->lsi_osd_obdname);
1693 strcat(lsi->lsi_osd_uuid, "_UUID");
1694 sprintf(flagstr, "%lu:%lu", mflags, (unsigned long) lmd->lmd_flags);
1696 obd = class_name2obd(lsi->lsi_osd_obdname);
1698 rc = lustre_start_simple(lsi->lsi_osd_obdname,
1700 lsi->lsi_osd_uuid, lmd->lmd_dev,
1701 flagstr, lsi->lsi_lmd->lmd_opts,
1705 obd = class_name2obd(lsi->lsi_osd_obdname);
1708 CDEBUG(D_MOUNT, "%s already started\n", lsi->lsi_osd_obdname);
1709 /* but continue setup to allow special case of MDT and internal
1710 * MGT being started separately. */
1711 if (!((IS_MGS(lsi) && (lsi->lsi_lmd->lmd_flags &
1713 (IS_MDT(lsi) && (lsi->lsi_lmd->lmd_flags &
1718 rc = obd_connect(NULL, &lsi->lsi_osd_exp,
1719 obd, &obd->obd_uuid, NULL, NULL);
1723 class_manual_cleanup(obd);
1724 lsi->lsi_dt_dev = NULL;
1728 LASSERT(obd->obd_lu_dev);
1729 lu_device_get(obd->obd_lu_dev);
1730 lsi->lsi_dt_dev = lu2dt_dev(obd->obd_lu_dev);
1731 LASSERT(lsi->lsi_dt_dev);
1733 /* set disk context for llog usage */
1734 OBD_SET_CTXT_MAGIC(&obd->obd_lvfs_ctxt);
1735 obd->obd_lvfs_ctxt.dt = lsi->lsi_dt_dev;
1737 dt_conf_get(NULL, lsi->lsi_dt_dev, &p);
1742 /** Fill in the superblock info for a Lustre server.
1743 * Mount the device with the correct options.
1744 * Read the on-disk config file.
1745 * Start the services.
1747 int server_fill_super(struct super_block *sb)
1749 struct lustre_sb_info *lsi = s2lsi(sb);
1753 /* to simulate target mount race */
1754 OBD_RACE(OBD_FAIL_TGT_MOUNT_RACE);
1756 rc = lsi_prepare(lsi);
1760 /* Start low level OSD */
1761 rc = osd_start(lsi, sb->s_flags);
1763 CERROR("Unable to start osd on %s: %d\n",
1764 lsi->lsi_lmd->lmd_dev, rc);
1769 CDEBUG(D_MOUNT, "Found service %s on device %s\n",
1770 lsi->lsi_svname, lsi->lsi_lmd->lmd_dev);
1772 if (class_name2obd(lsi->lsi_svname)) {
1773 LCONSOLE_ERROR_MSG(0x161, "The target named %s is already "
1774 "running. Double-mount may have compromised"
1775 " the disk journal.\n",
1781 /* Start MGS before MGC */
1782 if (IS_MGS(lsi) && !(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOMGS)) {
1783 rc = server_start_mgs(sb);
1788 /* Start MGC before servers */
1789 rc = lustre_start_mgc(sb);
1793 /* Set up all obd devices for service */
1794 if (!(lsi->lsi_lmd->lmd_flags & LMD_FLG_NOSVC) &&
1795 (IS_OST(lsi) || IS_MDT(lsi))) {
1796 rc = server_start_targets(sb);
1798 CERROR("Unable to start targets: %d\n", rc);
1801 /* FIXME overmount client here, or can we just start a
1802 * client log and client_fill_super on this sb? We
1803 * need to make sure server_put_super gets called too
1804 * - ll_put_super calls lustre_common_put_super; check
1805 * there for LSI_SERVER flag, call s_p_s if so.
1807 * Probably should start client from new thread so we
1808 * can return. Client will not finish until all
1809 * servers are connected. Note - MGS-only server does
1810 * NOT get a client, since there is no lustre fs
1811 * associated - the MGS is for all lustre fs's */
1814 rc = server_fill_super_common(sb);
1820 /* We jump here in case of failure while starting targets or MGS.
1821 * In this case we can't just put @mnt and have to do real cleanup
1822 * with stoping targets, etc. */
1823 server_put_super(sb);
1828 * Calculate timeout value for a target.
1830 void server_calc_timeout(struct lustre_sb_info *lsi, struct obd_device *obd)
1832 struct lustre_mount_data *lmd;
1836 bool has_ir = !!(lsi->lsi_flags & LDD_F_IR_CAPABLE);
1837 int min = OBD_RECOVERY_TIME_MIN;
1839 LASSERT(IS_SERVER(lsi));
1843 soft = lmd->lmd_recovery_time_soft;
1844 hard = lmd->lmd_recovery_time_hard;
1845 has_ir = has_ir && !(lmd->lmd_flags & LMD_FLG_NOIR);
1846 obd->obd_no_ir = !has_ir;
1850 soft = OBD_RECOVERY_TIME_SOFT;
1852 hard = OBD_RECOVERY_TIME_HARD;
1854 /* target may have ir_factor configured. */
1855 factor = OBD_IR_FACTOR_DEFAULT;
1856 if (obd->obd_recovery_ir_factor)
1857 factor = obd->obd_recovery_ir_factor;
1860 int new_soft = soft;
1861 int new_hard = hard;
1863 /* adjust timeout value by imperative recovery */
1865 new_soft = (soft * factor) / OBD_IR_FACTOR_MAX;
1866 new_hard = (hard * factor) / OBD_IR_FACTOR_MAX;
1868 /* make sure the timeout is not too short */
1869 new_soft = max(min, new_soft);
1870 new_hard = max(new_soft, new_hard);
1872 LCONSOLE_INFO("%s: Imperative Recovery enabled, recovery "
1873 "window shrunk from %d-%d down to %d-%d\n",
1874 obd->obd_name, soft, hard, new_soft, new_hard);
1881 obd->obd_recovery_timeout = max(obd->obd_recovery_timeout, soft);
1882 obd->obd_recovery_time_hard = hard;
1883 obd->obd_recovery_ir_factor = factor;