1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2001-2003 Cluster File Systems, Inc.
6 * This file is part of Lustre, http://www.lustre.org.
8 * Lustre is free software; you can redistribute it and/or
9 * modify it under the terms of version 2 of the GNU General Public
10 * License as published by the Free Software Foundation.
12 * Lustre is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with Lustre; if not, write to the Free Software
19 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
25 #define DEBUG_SUBSYSTEM S_CLASS
27 #include <linux/kmod.h> /* for request_module() */
28 #include <linux/module.h>
29 #include <linux/obd_class.h>
30 #include <linux/random.h>
31 #include <linux/slab.h>
32 #include <linux/pagemap.h>
34 #include <liblustre.h>
35 #include <linux/obd_class.h>
36 #include <linux/obd.h>
38 #include <linux/lustre_log.h>
39 #include <linux/lprocfs_status.h>
40 #include <portals/list.h>
43 /* Create a new device and set the type, name and uuid. If
44 * successful, the new device can be accessed by either name or uuid.
46 int class_attach(struct lustre_cfg *lcfg)
48 struct obd_type *type;
49 struct obd_device *obd;
50 char *typename, *name, *uuid;
51 int minor, rc, len, dev, stage = 0;
53 if (!lcfg->lcfg_inllen1 || !lcfg->lcfg_inlbuf1) {
54 CERROR("No type passed!\n");
57 if (lcfg->lcfg_inlbuf1[lcfg->lcfg_inllen1 - 1] != 0) {
58 CERROR("Type not nul terminated!\n");
61 typename = lcfg->lcfg_inlbuf1;
63 if (!lcfg->lcfg_dev_namelen || !lcfg->lcfg_dev_name) {
64 CERROR("No name passed!\n");
67 if (lcfg->lcfg_dev_name[lcfg->lcfg_dev_namelen - 1] != 0) {
68 CERROR("Name not nul terminated!\n");
71 name = lcfg->lcfg_dev_name;
73 if (!lcfg->lcfg_inllen2 || !lcfg->lcfg_inlbuf2) {
74 CERROR("No UUID passed!\n");
77 if (lcfg->lcfg_inlbuf2[lcfg->lcfg_inllen2 - 1] != 0) {
78 CERROR("UUID not nul terminated!\n");
81 uuid = lcfg->lcfg_inlbuf2;
83 CDEBUG(D_IOCTL, "attach type %s name: %s uuid: %s\n",
84 MKSTR(lcfg->lcfg_inlbuf1),
85 MKSTR(lcfg->lcfg_dev_name), MKSTR(lcfg->lcfg_inlbuf2));
88 type = class_get_type(typename);
90 CERROR("OBD: unknown type: %s\n", typename);
95 obd = class_name2obd(name);
97 CERROR("obd %s already attached\n", name);
98 GOTO(out, rc = -EEXIST);
101 obd = class_newdev(&dev);
103 GOTO(out, rc = -EINVAL);
105 /* have we attached a type to this device */
106 if (obd->obd_attached || obd->obd_type) {
107 CERROR("OBD: Device %d already typed as %s.\n",
108 obd->obd_minor, MKSTR(obd->obd_type->typ_name));
109 GOTO(out, rc = -EBUSY);
112 LASSERT(obd == (obd_dev + obd->obd_minor));
114 minor = obd->obd_minor;
115 memset(obd, 0, sizeof(*obd));
116 obd->obd_minor = minor;
117 obd->obd_type = type;
118 INIT_LIST_HEAD(&obd->obd_exports);
119 obd->obd_num_exports = 0;
120 spin_lock_init(&obd->obd_dev_lock);
121 spin_lock_init(&obd->obd_osfs_lock);
122 obd->obd_osfs_age = jiffies - 1000 * HZ;
123 init_waitqueue_head(&obd->obd_refcount_waitq);
125 /* XXX belongs in setup not attach */
127 spin_lock_init(&obd->obd_processing_task_lock);
128 init_waitqueue_head(&obd->obd_next_transno_waitq);
129 INIT_LIST_HEAD(&obd->obd_recovery_queue);
130 INIT_LIST_HEAD(&obd->obd_delayed_reply_queue);
132 spin_lock_init(&obd->obd_uncommitted_replies_lock);
133 INIT_LIST_HEAD(&obd->obd_uncommitted_replies);
135 len = strlen(name) + 1;
136 OBD_ALLOC(obd->obd_name, len);
138 GOTO(out, rc = -ENOMEM);
139 memcpy(obd->obd_name, name, len);
143 if (len >= sizeof(obd->obd_uuid)) {
144 CERROR("uuid must be < "LPSZ" bytes long\n",
145 sizeof(obd->obd_uuid));
146 GOTO(out, rc = -EINVAL);
148 memcpy(obd->obd_uuid.uuid, uuid, len);
151 if (OBP(obd, attach)) {
152 rc = OBP(obd,attach)(obd, sizeof *lcfg, lcfg);
154 GOTO(out, rc = -EINVAL);
157 obd->obd_attached = 1;
159 CDEBUG(D_IOCTL, "OBD: dev %d attached type %s\n",
160 obd->obd_minor, typename);
165 OBD_FREE(obd->obd_name, strlen(obd->obd_name) + 1);
167 class_put_type(obd->obd_type);
168 obd->obd_type = NULL;
173 int class_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
176 struct obd_export *exp;
179 LASSERT(obd == (obd_dev + obd->obd_minor));
181 /* have we attached a type to this device? */
182 if (!obd->obd_attached) {
183 CERROR("Device %d not attached\n", obd->obd_minor);
187 /* has this been done already? */
188 if (obd->obd_set_up) {
189 CERROR("Device %d already setup (type %s)\n",
190 obd->obd_minor, obd->obd_type->typ_name);
194 atomic_set(&obd->obd_refcount, 0);
196 exp = class_new_export(obd);
199 memcpy(&exp->exp_client_uuid, &obd->obd_uuid,
200 sizeof(exp->exp_client_uuid));
201 obd->obd_self_export = exp;
202 class_export_put(exp);
204 err = obd_setup(obd, sizeof(*lcfg), lcfg);
208 obd->obd_type->typ_refcnt++;
214 class_unlink_export(obd->obd_self_export);
215 obd->obd_self_export = NULL;
219 int class_detach(struct obd_device *obd, struct lustre_cfg *lcfg)
225 if (obd->obd_set_up) {
226 CERROR("OBD device %d still set up\n", obd->obd_minor);
229 if (!obd->obd_attached) {
230 CERROR("OBD device %d not attached\n", obd->obd_minor);
233 if (OBP(obd, detach))
234 err = OBP(obd,detach)(obd);
237 OBD_FREE(obd->obd_name, strlen(obd->obd_name)+1);
238 obd->obd_name = NULL;
240 CERROR("device %d: no name at detach\n", obd->obd_minor);
243 obd->obd_attached = 0;
244 obd->obd_type->typ_refcnt--;
245 class_put_type(obd->obd_type);
246 obd->obd_type = NULL;
247 minor = obd->obd_minor;
248 memset(obd, 0, sizeof(*obd));
249 obd->obd_minor = minor;
253 static void dump_exports(struct obd_device *obd)
255 struct obd_export *exp, *n;
257 list_for_each_entry_safe(exp, n, &obd->obd_exports, exp_obd_chain) {
258 struct ptlrpc_reply_state *rs;
259 struct ptlrpc_reply_state *first_reply = NULL;
262 list_for_each_entry (rs, &exp->exp_outstanding_replies,
269 CERROR("%s: %p %s %d %d %d: %p %s\n",
270 obd->obd_name, exp, exp->exp_client_uuid.uuid,
271 atomic_read(&exp->exp_refcount),
272 exp->exp_failed, nreplies, first_reply,
273 nreplies > 3 ? "..." : "");
277 int class_cleanup(struct obd_device *obd, struct lustre_cfg *lcfg)
284 if (!obd->obd_set_up) {
285 CERROR("Device %d not setup\n", obd->obd_minor);
289 if (lcfg->lcfg_inlbuf1) {
290 for (flag = lcfg->lcfg_inlbuf1; *flag != 0; flag++)
293 flags |= OBD_OPT_FORCE;
296 flags |= OBD_OPT_FAILOVER;
299 CERROR("unrecognised flag '%c'\n",
304 /* The one reference that should be remaining is the
306 if (atomic_read(&obd->obd_refcount) <= 1 ||
307 flags & OBD_OPT_FORCE) {
308 /* this will stop new connections, and need to
309 do it before class_disconnect_exports() */
310 obd->obd_stopping = 1;
313 if (atomic_read(&obd->obd_refcount) > 1) {
314 struct l_wait_info lwi = LWI_TIMEOUT_INTR(1 * HZ, NULL,
318 if (!(flags & OBD_OPT_FORCE)) {
319 CERROR("OBD device %d (%p) has refcount %d\n",
321 atomic_read(&obd->obd_refcount));
323 GOTO(out, err = -EBUSY);
325 class_disconnect_exports(obd, flags);
327 "%s: waiting for obd refs to go away: %d\n",
328 obd->obd_name, atomic_read(&obd->obd_refcount));
330 rc = l_wait_event(obd->obd_refcount_waitq,
331 atomic_read(&obd->obd_refcount) < 2, &lwi);
333 LASSERT(atomic_read(&obd->obd_refcount) == 1);
335 CERROR("wait cancelled cleaning anyway. "
337 atomic_read(&obd->obd_refcount));
340 CDEBUG(D_IOCTL, "%s: awake, now finishing cleanup\n",
344 if (obd->obd_self_export) {
345 err = obd_precleanup(obd, flags);
348 class_unlink_export(obd->obd_self_export);
349 obd->obd_self_export = NULL;
352 err = obd_cleanup(obd, flags);
355 obd->obd_set_up = obd->obd_stopping = 0;
356 obd->obd_type->typ_refcnt--;
357 /* XXX this should be an LASSERT */
358 if (atomic_read(&obd->obd_refcount) > 0)
359 CERROR("%s still has refcount %d after "
360 "cleanup.\n", obd->obd_name,
361 atomic_read(&obd->obd_refcount));
368 LIST_HEAD(lustre_profile_list);
370 struct lustre_profile *class_get_profile(char * prof)
372 struct lustre_profile *lprof;
374 list_for_each_entry(lprof, &lustre_profile_list, lp_list) {
375 if (!strcmp(lprof->lp_profile, prof)) {
382 int class_add_profile(int proflen, char *prof, int osclen, char *osc,
383 int mdclen, char *mdc)
385 struct lustre_profile *lprof;
388 OBD_ALLOC(lprof, sizeof(*lprof));
390 GOTO(out, err = -ENOMEM);
391 INIT_LIST_HEAD(&lprof->lp_list);
393 LASSERT(proflen == (strlen(prof) + 1));
394 OBD_ALLOC(lprof->lp_profile, proflen);
395 if (lprof->lp_profile == NULL)
396 GOTO(out, err = -ENOMEM);
397 memcpy(lprof->lp_profile, prof, proflen);
399 LASSERT(osclen == (strlen(osc) + 1));
400 OBD_ALLOC(lprof->lp_osc, osclen);
401 if (lprof->lp_profile == NULL)
402 GOTO(out, err = -ENOMEM);
403 memcpy(lprof->lp_osc, osc, osclen);
406 LASSERT(mdclen == (strlen(mdc) + 1));
407 OBD_ALLOC(lprof->lp_mdc, mdclen);
408 if (lprof->lp_mdc == NULL)
409 GOTO(out, err = -ENOMEM);
410 memcpy(lprof->lp_mdc, mdc, mdclen);
413 list_add(&lprof->lp_list, &lustre_profile_list);
419 void class_del_profile(char *prof)
421 struct lustre_profile *lprof;
423 lprof = class_get_profile(prof);
425 list_del(&lprof->lp_list);
426 OBD_FREE(lprof->lp_profile, strlen(lprof->lp_profile) + 1);
427 OBD_FREE(lprof->lp_osc, strlen(lprof->lp_osc) + 1);
429 OBD_FREE(lprof->lp_mdc, strlen(lprof->lp_mdc) + 1);
430 OBD_FREE(lprof, sizeof *lprof);
434 int class_process_config(struct lustre_cfg *lcfg)
436 struct obd_device *obd;
437 char str[PTL_NALFMT_SIZE];
440 LASSERT(lcfg && !IS_ERR(lcfg));
442 CDEBUG(D_IOCTL, "processing cmd: %x\n", lcfg->lcfg_command);
444 /* Commands that don't need a device */
445 switch(lcfg->lcfg_command) {
447 err = class_attach(lcfg);
450 case LCFG_ADD_UUID: {
451 CDEBUG(D_IOCTL, "adding mapping from uuid %s to nid "LPX64
452 " (%s), nal %d\n", lcfg->lcfg_inlbuf1, lcfg->lcfg_nid,
453 portals_nid2str(lcfg->lcfg_nal, lcfg->lcfg_nid, str),
456 err = class_add_uuid(lcfg->lcfg_inlbuf1, lcfg->lcfg_nid,
460 case LCFG_DEL_UUID: {
461 CDEBUG(D_IOCTL, "removing mappings for uuid %s\n",
462 lcfg->lcfg_inlbuf1 == NULL ? "<all uuids>" :
465 err = class_del_uuid(lcfg->lcfg_inlbuf1);
468 case LCFG_MOUNTOPT: {
469 CDEBUG(D_IOCTL, "mountopt: profile %s osc %s mdc %s\n",
470 lcfg->lcfg_inlbuf1, lcfg->lcfg_inlbuf2,
472 /* set these mount options somewhere, so ll_fill_super
474 err = class_add_profile(lcfg->lcfg_inllen1, lcfg->lcfg_inlbuf1,
475 lcfg->lcfg_inllen2, lcfg->lcfg_inlbuf2,
476 lcfg->lcfg_inllen3, lcfg->lcfg_inlbuf3);
479 case LCFG_DEL_MOUNTOPT: {
480 CDEBUG(D_IOCTL, "mountopt: profile %s\n", lcfg->lcfg_inlbuf1);
481 /* set these mount options somewhere, so ll_fill_super
483 class_del_profile(lcfg->lcfg_inlbuf1);
486 case LCFG_SET_TIMEOUT: {
487 CDEBUG(D_IOCTL, "changing lustre timeout from %d to %d\n",
490 obd_timeout = lcfg->lcfg_num;
493 case LCFG_SET_UPCALL: {
494 CDEBUG(D_IOCTL, "setting lustre ucpall to: %s\n",
496 if (lcfg->lcfg_inllen1 > sizeof obd_lustre_upcall)
497 GOTO(out, err = -EINVAL);
498 memcpy(obd_lustre_upcall, lcfg->lcfg_inlbuf1,
504 /* Commands that require a device */
505 obd = class_name2obd(lcfg->lcfg_dev_name);
507 if (lcfg->lcfg_dev_name == NULL)
508 CERROR("this lcfg command requires a device name\n");
510 CERROR("no device for: %s\n", lcfg->lcfg_dev_name);
512 GOTO(out, err = -EINVAL);
515 switch(lcfg->lcfg_command) {
517 err = class_setup(obd, lcfg);
521 err = class_detach(obd, lcfg);
525 err = class_cleanup(obd, lcfg);
529 CERROR("Unknown command: %d\n", lcfg->lcfg_command);
530 GOTO(out, err = -EINVAL);
538 static int class_config_llog_handler(struct llog_handle * handle,
539 struct llog_rec_hdr *rec, void *data)
541 struct config_llog_instance *cfg = data;
542 int cfg_len = rec->lrh_len;
543 char *cfg_buf = (char*) (rec + 1);
546 if (rec->lrh_type == OBD_CFG_REC) {
548 struct lustre_cfg *lcfg;
549 char *old_name = NULL;
551 char *old_uuid = NULL;
552 int old_uuid_len = 0;
553 char *inst_name = NULL;
556 rc = lustre_cfg_getdata(&buf, cfg_len, cfg_buf, 1);
559 lcfg = (struct lustre_cfg* ) buf;
561 if (cfg && cfg->cfg_instance && lcfg->lcfg_dev_name) {
562 inst_len = strlen(lcfg->lcfg_dev_name) +
563 strlen(cfg->cfg_instance) + 2;
564 OBD_ALLOC(inst_name, inst_len);
565 if (inst_name == NULL)
566 GOTO(out, rc = -ENOMEM);
567 sprintf(inst_name, "%s-%s", lcfg->lcfg_dev_name,
569 old_name = lcfg->lcfg_dev_name;
570 old_len = lcfg->lcfg_dev_namelen;
571 lcfg->lcfg_dev_name = inst_name;
572 lcfg->lcfg_dev_namelen = strlen(inst_name) + 1;
575 if (cfg && lcfg->lcfg_command == LCFG_ATTACH) {
576 old_uuid = lcfg->lcfg_inlbuf2;
577 old_uuid_len = lcfg->lcfg_inllen2;
579 lcfg->lcfg_inlbuf2 = (char*)&cfg->cfg_uuid.uuid;
580 lcfg->lcfg_inllen2 = sizeof(cfg->cfg_uuid);
583 rc = class_process_config(lcfg);
586 lcfg->lcfg_dev_name = old_name;
587 lcfg->lcfg_dev_namelen = old_len;
588 OBD_FREE(inst_name, inst_len);
592 lcfg->lcfg_inlbuf2 = old_uuid;
593 lcfg->lcfg_inllen2 = old_uuid_len;
596 lustre_cfg_freedata(buf, cfg_len);
597 } else if (rec->lrh_type == PTL_CFG_REC) {
598 struct portals_cfg *pcfg = (struct portals_cfg *)cfg_buf;
599 if (pcfg->pcfg_command ==NAL_CMD_REGISTER_MYNID &&
600 cfg->cfg_local_nid != PTL_NID_ANY) {
601 pcfg->pcfg_nid = cfg->cfg_local_nid;
604 rc = libcfs_nal_cmd(pcfg);
610 int class_config_parse_llog(struct llog_ctxt *ctxt, char *name,
611 struct config_llog_instance *cfg)
613 struct llog_handle *llh;
617 rc = llog_create(ctxt, &llh, NULL, name);
621 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
625 rc = llog_process(llh, class_config_llog_handler, cfg, NULL);
627 rc2 = llog_close(llh);
635 static int class_config_dump_handler(struct llog_handle * handle,
636 struct llog_rec_hdr *rec, void *data)
638 int cfg_len = rec->lrh_len;
639 char *cfg_buf = (char*) (rec + 1);
642 if (rec->lrh_type == OBD_CFG_REC) {
644 struct lustre_cfg *lcfg;
646 rc = lustre_cfg_getdata(&buf, cfg_len, cfg_buf, 1);
649 lcfg = (struct lustre_cfg* ) buf;
651 CDEBUG(D_INFO, "lcfg command: %x\n", lcfg->lcfg_command);
652 if (lcfg->lcfg_dev_name)
653 CDEBUG(D_INFO, " devname: %s\n",
654 lcfg->lcfg_dev_name);
655 if (lcfg->lcfg_flags)
656 CDEBUG(D_INFO, " flags: %x\n", lcfg->lcfg_flags);
658 CDEBUG(D_INFO, " nid: "LPX64"\n",
661 CDEBUG(D_INFO, " nal: %x\n", lcfg->lcfg_nal);
663 CDEBUG(D_INFO, " nal: %x\n", lcfg->lcfg_num);
664 if (lcfg->lcfg_inlbuf1)
665 CDEBUG(D_INFO, " inlbuf1: %s\n",lcfg->lcfg_inlbuf1);
666 if (lcfg->lcfg_inlbuf2)
667 CDEBUG(D_INFO, " inlbuf1: %s\n",lcfg->lcfg_inlbuf2);
668 if (lcfg->lcfg_inlbuf3)
669 CDEBUG(D_INFO, " inlbuf1: %s\n",lcfg->lcfg_inlbuf3);
670 if (lcfg->lcfg_inlbuf4)
671 CDEBUG(D_INFO, " inlbuf1: %s\n",lcfg->lcfg_inlbuf4);
673 lustre_cfg_freedata(buf, cfg_len);
674 } else if (rec->lrh_type == PTL_CFG_REC) {
675 struct portals_cfg *pcfg = (struct portals_cfg *)cfg_buf;
677 CDEBUG(D_INFO, "pcfg command: %d\n", pcfg->pcfg_command);
679 CDEBUG(D_INFO, " nal: %d\n",
681 if (pcfg->pcfg_gw_nal)
682 CDEBUG(D_INFO, " gw_nal: %d\n",
685 CDEBUG(D_INFO, " nid: "LPX64"\n",
688 CDEBUG(D_INFO, " nid: "LPX64"\n",
691 CDEBUG(D_INFO, " nid: "LPX64"\n",
694 CDEBUG(D_INFO, " nid: %d\n",
697 CDEBUG(D_INFO, " id: %x\n",
699 if (pcfg->pcfg_flags)
700 CDEBUG(D_INFO, " flags: %x\n",
703 CERROR("unhandled lrh_type: %#x\n", rec->lrh_type);
710 int class_config_dump_llog(struct llog_ctxt *ctxt, char *name,
711 struct config_llog_instance *cfg)
713 struct llog_handle *llh;
717 rc = llog_create(ctxt, &llh, NULL, name);
721 rc = llog_init_handle(llh, LLOG_F_IS_PLAIN, NULL);
725 rc = llog_process(llh, class_config_dump_handler, cfg, NULL);
727 rc2 = llog_close(llh);