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) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * lustre/liblustre/llite_lib.c
36 * Lustre Light common routines
43 #include <sys/types.h>
45 #include <sys/queue.h>
47 #include <liblustre.h>
48 #include <lnet/lnetctl.h> /* needed for parse_dump */
49 #include <lustre_log.h>
52 #include "llite_lib.h"
54 int slp_global_init(void);
56 static int lllib_init(void)
58 if (liblustre_init_current("liblustre") ||
70 return _sysio_fssw_register("lustre", &llu_fssw_ops);
73 int liblustre_process_log(struct config_llog_instance *cfg,
74 char *mgsnid, char *profile,
77 struct lustre_cfg_bufs bufs;
78 struct lustre_cfg *lcfg;
79 char *peer = "MGS_UUID";
80 struct obd_device *obd;
81 struct obd_export *exp;
82 char *name = "mgc_dev";
84 struct obd_uuid mgc_uuid;
85 struct llog_ctxt *ctxt;
89 struct obd_connect_data *ocd = NULL;
92 ll_generate_random_uuid(uuid);
93 class_uuid_unparse(uuid, &mgc_uuid);
95 nid = libcfs_str2nid(mgsnid);
96 if (nid == LNET_NID_ANY) {
97 CERROR("Can't parse NID %s\n", mgsnid);
101 lustre_cfg_bufs_reset(&bufs, NULL);
102 lustre_cfg_bufs_set_string(&bufs, 1, peer);
103 lcfg = lustre_cfg_new(LCFG_ADD_UUID, &bufs);
104 lcfg->lcfg_nid = nid;
105 rc = class_process_config(lcfg);
106 lustre_cfg_free(lcfg);
110 lustre_cfg_bufs_reset(&bufs, name);
111 lustre_cfg_bufs_set_string(&bufs, 1, LUSTRE_MGC_NAME);
112 lustre_cfg_bufs_set_string(&bufs, 2, mgc_uuid.uuid);
113 lcfg = lustre_cfg_new(LCFG_ATTACH, &bufs);
114 rc = class_process_config(lcfg);
115 lustre_cfg_free(lcfg);
117 GOTO(out_del_uuid, rc);
119 lustre_cfg_bufs_reset(&bufs, name);
120 lustre_cfg_bufs_set_string(&bufs, 1, LUSTRE_MGS_OBDNAME);
121 lustre_cfg_bufs_set_string(&bufs, 2, peer);
122 lcfg = lustre_cfg_new(LCFG_SETUP, &bufs);
123 rc = class_process_config(lcfg);
124 lustre_cfg_free(lcfg);
126 GOTO(out_detach, rc);
128 while ((mdsnid = strsep(&mgsnid, ","))) {
129 nid = libcfs_str2nid(mdsnid);
130 lustre_cfg_bufs_reset(&bufs, NULL);
131 lustre_cfg_bufs_set_string(&bufs, 1, libcfs_nid2str(nid));
132 lcfg = lustre_cfg_new(LCFG_ADD_UUID, &bufs);
133 lcfg->lcfg_nid = nid;
134 rc = class_process_config(lcfg);
135 lustre_cfg_free(lcfg);
137 CERROR("Add uuid for %s failed %d\n",
138 libcfs_nid2str(nid), rc);
142 lustre_cfg_bufs_reset(&bufs, name);
143 lustre_cfg_bufs_set_string(&bufs, 1, libcfs_nid2str(nid));
144 lcfg = lustre_cfg_new(LCFG_ADD_CONN, &bufs);
145 lcfg->lcfg_nid = nid;
146 rc = class_process_config(lcfg);
147 lustre_cfg_free(lcfg);
149 CERROR("Add conn for %s failed %d\n",
150 libcfs_nid2str(nid), rc);
155 obd = class_name2obd(name);
157 GOTO(out_cleanup, rc = -EINVAL);
159 OBD_ALLOC(ocd, sizeof(*ocd));
161 GOTO(out_cleanup, rc = -ENOMEM);
163 ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
165 ocd->ocd_version = LUSTRE_VERSION_CODE;
167 rc = obd_connect(NULL, &exp, obd, &mgc_uuid, ocd, NULL);
169 CERROR("cannot connect to %s at %s: rc = %d\n",
170 LUSTRE_MGS_OBDNAME, mgsnid, rc);
171 GOTO(out_cleanup, rc);
174 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
175 cfg->cfg_flags |= CFG_F_COMPAT146;
176 rc = class_config_parse_llog(NULL, ctxt, profile, cfg);
179 CERROR("class_config_parse_llog failed: rc = %d\n", rc);
182 /* We don't so much care about errors in cleaning up the config llog
183 * connection, as we have already read the config by this point. */
184 err = obd_disconnect(exp);
186 CERROR("obd_disconnect failed: rc = %d\n", err);
190 OBD_FREE(ocd, sizeof(*ocd));
192 lustre_cfg_bufs_reset(&bufs, name);
193 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
194 err = class_process_config(lcfg);
195 lustre_cfg_free(lcfg);
197 CERROR("md_cleanup failed: rc = %d\n", err);
200 lustre_cfg_bufs_reset(&bufs, name);
201 lcfg = lustre_cfg_new(LCFG_DETACH, &bufs);
202 err = class_process_config(lcfg);
203 lustre_cfg_free(lcfg);
205 CERROR("md_detach failed: rc = %d\n", err);
208 lustre_cfg_bufs_reset(&bufs, name);
209 lustre_cfg_bufs_set_string(&bufs, 1, peer);
210 lcfg = lustre_cfg_new(LCFG_DEL_UUID, &bufs);
211 err = class_process_config(lcfg);
213 CERROR("del MDC UUID failed: rc = %d\n", err);
214 lustre_cfg_free(lcfg);
220 /* parse host:/fsname string */
221 int ll_parse_mount_target(const char *target, char **mgsnid,
224 static char buf[256];
228 strncpy(buf, target, 255);
230 if ((s = strchr(buf, ':'))) {
236 sprintf(s + strlen(s), "-client");
246 * early liblustre init
247 * called from C startup in catamount apps, before main()
249 * The following is a skeleton sysio startup sequence,
250 * as implemented in C startup (skipping error handling).
251 * In this framework none of these calls need be made here
252 * or in the apps themselves. The NAMESPACE_STRING specifying
253 * the initial set of fs ops (creates, mounts, etc.) is passed
254 * as an environment variable.
257 * _sysio_incore_init();
258 * _sysio_native_init();
259 * _sysio_lustre_init();
260 * _sysio_boot(NAMESPACE_STRING);
262 * the name _sysio_lustre_init() follows the naming convention
263 * established in other fs drivers from libsysio:
264 * _sysio_incore_init(), _sysio_native_init()
266 * _sysio_lustre_init() must be called before _sysio_boot()
267 * to enable libsysio's processing of namespace init strings containing
268 * lustre filesystem operations
270 int _sysio_lustre_init(void)
275 extern void __liblustre_cleanup_(void);
278 liblustre_init_random();
282 perror("init llite driver");
286 envstr = getenv("LIBLUSTRE_TIMEOUT");
287 if (envstr != NULL) {
288 obd_timeout = (unsigned int)strtol(envstr, NULL, 0);
289 printf("LibLustre: obd timeout=%u seconds\n",
293 /* debug peer on timeout? */
294 envstr = getenv("LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT");
295 if (envstr != NULL) {
296 obd_debug_peer_on_timeout =
297 (unsigned int)strtol(envstr, NULL, 0);
298 printf("LibLustre: debug peer on timeout=%d\n",
299 obd_debug_peer_on_timeout ? 0 : 1);
303 (void)atexit(__liblustre_cleanup_);
308 extern int _sysio_native_init();
310 static int mnt_retry = 0;
312 char *lustre_path = NULL;
314 void __liblustre_setup_(void)
317 char *lustre_driver = "lustre";
318 unsigned mntflgs = 0;
321 lustre_path = getenv("LIBLUSTRE_MOUNT_POINT");
323 lustre_path = "/mnt/lustre";
326 target = getenv("LIBLUSTRE_MOUNT_RETRY");
328 mnt_retry = atoi(target);
334 target = getenv("LIBLUSTRE_MOUNT_TARGET");
336 printf("LibLustre: no mount target specified\n");
340 CDEBUG(D_CONFIG, "LibLustre: mount point %s, target %s\n",
341 lustre_path, target);
344 /* initialize libsysio & mount rootfs */
346 perror("init sysio");
349 _sysio_native_init();
351 err = _sysio_mount_root("/", "native", mntflgs, NULL);
353 fprintf(stderr, "sysio mount failed: %s\n", strerror(errno));
357 if (_sysio_lustre_init())
359 #endif /* INIT_SYSIO */
363 err = mount(target, lustre_path, lustre_driver, mntflgs, NULL);
364 if (err && mnt_retry && (-- count)) {
365 fprintf(stderr, "Lustre mount failed: %s. "
366 "Will retry %d more times\n",
367 strerror(errno), mnt_retry - count );
370 } while (err && count > 0);
372 fprintf(stderr, "Lustre mount failed: %s\n", strerror(errno));
377 void __liblustre_cleanup_(void)
380 /* guard against being called multiple times */
381 static int cleaned = 0;
388 /* user app might chdir to a lustre directory, and leave busy pnode
389 * during finaly libsysio cleanup. here we chdir back to "/".
390 * but it can't fix the situation that liblustre is mounted
397 /* we can't call umount here, because libsysio will not cleanup
398 * opening files for us. _sysio_shutdown() will cleanup fds at
399 * first but which will also close the sockets we need for umount
400 * liblutre. this dilema lead to another hack in
401 * libsysio/src/file_hack.c FIXME
405 cleanup_lib_portals();