1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
18 * You should have received a copy of the GNU General Public License
19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * lustre/liblustre/llite_lib.c
38 * Lustre Light common routines
45 #include <sys/types.h>
47 #include <sys/queue.h>
60 /* both sys/queue.h (libsysio require it) and portals/lists.h have definition
61 * of 'LIST_HEAD'. undef it to suppress warnings
64 #include <liblustre.h>
65 #include <lnet/lnetctl.h> /* needed for parse_dump */
68 #include "llite_lib.h"
70 static int lllib_init(void)
72 if (liblustre_init_current("liblustre") ||
82 return _sysio_fssw_register("lustre", &llu_fssw_ops);
85 int liblustre_process_log(struct config_llog_instance *cfg,
86 char *mgsnid, char *profile,
89 struct lustre_cfg_bufs bufs;
90 struct lustre_cfg *lcfg;
91 char *peer = "MGS_UUID";
92 struct obd_device *obd;
93 struct lustre_handle mgc_conn = {0, };
94 struct obd_export *exp;
95 char *name = "mgc_dev";
97 struct obd_uuid mgc_uuid;
98 struct llog_ctxt *ctxt;
102 struct obd_connect_data *ocd = NULL;
105 ll_generate_random_uuid(uuid);
106 class_uuid_unparse(uuid, &mgc_uuid);
108 nid = libcfs_str2nid(mgsnid);
109 if (nid == LNET_NID_ANY) {
110 CERROR("Can't parse NID %s\n", mgsnid);
114 lustre_cfg_bufs_reset(&bufs, NULL);
115 lustre_cfg_bufs_set_string(&bufs, 1, peer);
116 lcfg = lustre_cfg_new(LCFG_ADD_UUID, &bufs);
117 lcfg->lcfg_nid = nid;
118 rc = class_process_config(lcfg);
119 lustre_cfg_free(lcfg);
123 lustre_cfg_bufs_reset(&bufs, name);
124 lustre_cfg_bufs_set_string(&bufs, 1, LUSTRE_MGC_NAME);
125 lustre_cfg_bufs_set_string(&bufs, 2, mgc_uuid.uuid);
126 lcfg = lustre_cfg_new(LCFG_ATTACH, &bufs);
127 rc = class_process_config(lcfg);
128 lustre_cfg_free(lcfg);
130 GOTO(out_del_uuid, rc);
132 lustre_cfg_bufs_reset(&bufs, name);
133 lustre_cfg_bufs_set_string(&bufs, 1, LUSTRE_MGS_OBDNAME);
134 lustre_cfg_bufs_set_string(&bufs, 2, peer);
135 lcfg = lustre_cfg_new(LCFG_SETUP, &bufs);
136 rc = class_process_config(lcfg);
137 lustre_cfg_free(lcfg);
139 GOTO(out_detach, rc);
141 while ((mdsnid = strsep(&mgsnid, ","))) {
142 nid = libcfs_str2nid(mdsnid);
143 lustre_cfg_bufs_reset(&bufs, NULL);
144 lustre_cfg_bufs_set_string(&bufs, 1, libcfs_nid2str(nid));
145 lcfg = lustre_cfg_new(LCFG_ADD_UUID, &bufs);
146 lcfg->lcfg_nid = nid;
147 rc = class_process_config(lcfg);
148 lustre_cfg_free(lcfg);
150 CERROR("Add uuid for %s failed %d\n",
151 libcfs_nid2str(nid), rc);
155 lustre_cfg_bufs_reset(&bufs, name);
156 lustre_cfg_bufs_set_string(&bufs, 1, libcfs_nid2str(nid));
157 lcfg = lustre_cfg_new(LCFG_ADD_CONN, &bufs);
158 lcfg->lcfg_nid = nid;
159 rc = class_process_config(lcfg);
160 lustre_cfg_free(lcfg);
162 CERROR("Add conn for %s failed %d\n",
163 libcfs_nid2str(nid), rc);
168 obd = class_name2obd(name);
170 GOTO(out_cleanup, rc = -EINVAL);
172 OBD_ALLOC(ocd, sizeof(*ocd));
174 GOTO(out_cleanup, rc = -ENOMEM);
176 ocd->ocd_connect_flags = OBD_CONNECT_VERSION | OBD_CONNECT_AT |
178 #ifdef LIBLUSTRE_POSIX_ACL
179 ocd->ocd_connect_flags |= OBD_CONNECT_ACL;
181 ocd->ocd_version = LUSTRE_VERSION_CODE;
183 rc = obd_connect(&mgc_conn, obd, &mgc_uuid, ocd, NULL);
185 CERROR("cannot connect to %s at %s: rc = %d\n",
186 LUSTRE_MGS_OBDNAME, mgsnid, rc);
187 GOTO(out_cleanup, rc);
190 exp = class_conn2export(&mgc_conn);
192 ctxt = llog_get_context(exp->exp_obd, LLOG_CONFIG_REPL_CTXT);
193 cfg->cfg_flags |= CFG_F_COMPAT146;
194 rc = class_config_parse_llog(ctxt, profile, cfg);
197 CERROR("class_config_parse_llog failed: rc = %d\n", rc);
200 /* We don't so much care about errors in cleaning up the config llog
201 * connection, as we have already read the config by this point. */
202 err = obd_disconnect(exp);
204 CERROR("obd_disconnect failed: rc = %d\n", err);
208 OBD_FREE(ocd, sizeof(*ocd));
210 lustre_cfg_bufs_reset(&bufs, name);
211 lcfg = lustre_cfg_new(LCFG_CLEANUP, &bufs);
212 err = class_process_config(lcfg);
213 lustre_cfg_free(lcfg);
215 CERROR("mdc_cleanup failed: rc = %d\n", err);
218 lustre_cfg_bufs_reset(&bufs, name);
219 lcfg = lustre_cfg_new(LCFG_DETACH, &bufs);
220 err = class_process_config(lcfg);
221 lustre_cfg_free(lcfg);
223 CERROR("mdc_detach failed: rc = %d\n", err);
226 lustre_cfg_bufs_reset(&bufs, name);
227 lustre_cfg_bufs_set_string(&bufs, 1, peer);
228 lcfg = lustre_cfg_new(LCFG_DEL_UUID, &bufs);
229 err = class_process_config(lcfg);
231 CERROR("del MDC UUID failed: rc = %d\n", err);
232 lustre_cfg_free(lcfg);
238 /* parse host:/fsname string */
239 int ll_parse_mount_target(const char *target, char **mgsnid,
242 static char buf[256];
246 strncpy(buf, target, 255);
248 if ((s = strchr(buf, ':'))) {
254 sprintf(s + strlen(s), "-client");
264 * early liblustre init
265 * called from C startup in catamount apps, before main()
267 * The following is a skeleton sysio startup sequence,
268 * as implemented in C startup (skipping error handling).
269 * In this framework none of these calls need be made here
270 * or in the apps themselves. The NAMESPACE_STRING specifying
271 * the initial set of fs ops (creates, mounts, etc.) is passed
272 * as an environment variable.
275 * _sysio_incore_init();
276 * _sysio_native_init();
277 * _sysio_lustre_init();
278 * _sysio_boot(NAMESPACE_STRING);
280 * the name _sysio_lustre_init() follows the naming convention
281 * established in other fs drivers from libsysio:
282 * _sysio_incore_init(), _sysio_native_init()
284 * _sysio_lustre_init() must be called before _sysio_boot()
285 * to enable libsysio's processing of namespace init strings containing
286 * lustre filesystem operations
288 int _sysio_lustre_init(void)
293 extern void __liblustre_cleanup_(void);
296 liblustre_init_random();
300 perror("init llite driver");
304 envstr = getenv("LIBLUSTRE_TIMEOUT");
305 if (envstr != NULL) {
306 obd_timeout = (unsigned int)strtol(envstr, NULL, 0);
307 printf("LibLustre: obd timeout=%u seconds\n",
311 /* debug peer on timeout? */
312 envstr = getenv("LIBLUSTRE_DEBUG_PEER_ON_TIMEOUT");
313 if (envstr != NULL) {
314 obd_debug_peer_on_timeout =
315 (unsigned int)strtol(envstr, NULL, 0);
316 printf("LibLustre: debug peer on timeout=%d\n",
317 obd_debug_peer_on_timeout ? 0 : 1);
321 (void)atexit(__liblustre_cleanup_);
326 extern int _sysio_native_init();
328 static int mnt_retry = 0;
330 char *lustre_path = NULL;
332 void __liblustre_setup_(void)
335 char *lustre_driver = "lustre";
336 unsigned mntflgs = 0;
339 lustre_path = getenv("LIBLUSTRE_MOUNT_POINT");
341 lustre_path = "/mnt/lustre";
344 target = getenv("LIBLUSTRE_MOUNT_RETRY");
346 mnt_retry = atoi(target);
352 target = getenv("LIBLUSTRE_MOUNT_TARGET");
354 printf("LibLustre: no mount target specified\n");
358 CDEBUG(D_CONFIG, "LibLustre: mount point %s, target %s\n",
359 lustre_path, target);
362 /* initialize libsysio & mount rootfs */
364 perror("init sysio");
367 _sysio_native_init();
369 err = _sysio_mount_root("/", "native", mntflgs, NULL);
371 fprintf(stderr, "sysio mount failed: %s\n", strerror(errno));
375 if (_sysio_lustre_init())
377 #endif /* INIT_SYSIO */
381 err = mount(target, lustre_path, lustre_driver, mntflgs, NULL);
382 if (err && mnt_retry && (-- count)) {
383 fprintf(stderr, "Lustre mount failed: %s. "
384 "Will retry %d more times\n",
385 strerror(errno), mnt_retry - count );
388 } while (err && count > 0);
390 fprintf(stderr, "Lustre mount failed: %s\n", strerror(errno));
395 void __liblustre_cleanup_(void)
398 /* guard against being called multiple times */
399 static int cleaned = 0;
406 /* user app might chdir to a lustre directory, and leave busy pnode
407 * during finaly libsysio cleanup. here we chdir back to "/".
408 * but it can't fix the situation that liblustre is mounted
415 /* we can't call umount here, because libsysio will not cleanup
416 * opening files for us. _sysio_shutdown() will cleanup fds at
417 * first but which will also close the sockets we need for umount
418 * liblutre. this dilema lead to another hack in
419 * libsysio/src/file_hack.c FIXME
423 cleanup_lib_portals();