1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (c) 2002 Cluster File Systems, Inc. <info@clusterfs.com>
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.
22 #define DEBUG_SUBSYSTEM S_CMOBD
24 #include <linux/version.h>
25 #include <linux/init.h>
26 #include <linux/obd_support.h>
27 #include <linux/lustre_lib.h>
28 #include <linux/lustre_net.h>
29 #include <linux/lustre_idl.h>
30 #include <linux/obd_class.h>
31 #include <linux/lustre_mds.h>
32 #include <linux/lustre_cmobd.h>
33 #include <linux/lprocfs_status.h>
34 #include <linux/obd_lov.h>
35 #include <linux/obd_ost.h>
36 #include <linux/obd_lmv.h>
38 #include "cm_internal.h"
40 static int cmobd_attach(struct obd_device *obd,
41 obd_count len, void *data)
43 struct lprocfs_static_vars lvars;
45 lprocfs_init_vars(cmobd, &lvars);
46 return lprocfs_obd_attach(obd, lvars.obd_vars);
49 static int cmobd_detach(struct obd_device *obd)
51 return lprocfs_obd_detach(obd);
54 static inline int cmobd_md_obd(struct obd_device *obd)
56 if (!strcmp(obd->obd_type->typ_name, OBD_MDC_DEVICENAME) ||
57 !strcmp(obd->obd_type->typ_name, OBD_LMV_DEVICENAME))
63 static inline int cmobd_dt_obd(struct obd_device *obd)
65 if (!strcmp(obd->obd_type->typ_name, OBD_LOV_DEVICENAME) ||
66 !strcmp(obd->obd_type->typ_name, OBD_OSC_DEVICENAME))
72 static void cmobd_init_ea_size(struct obd_device *obd)
74 int ost_count = 1, easize, cookiesize;
75 struct cm_obd *cmobd = &obd->u.cm;
79 * here we should also take into account that there is possible to have
82 easize = lov_mds_md_size(ost_count);
83 cookiesize = ost_count * sizeof(struct llog_cookie);
85 obd_init_ea_size(cmobd->master_exp, easize, cookiesize);
87 cmobd->master_exp->exp_obd->u.cli.cl_max_mds_easize = easize;
88 cmobd->master_exp->exp_obd->u.cli.cl_max_mds_cookiesize = cookiesize;
93 static char *types[] = {
94 OBD_LMV_DEVICENAME, OBD_MDC_DEVICENAME,
95 OBD_LOV_DEVICENAME, OBD_OSC_DEVICENAME
98 static struct obd_device *
99 cmobd_find_obd(struct obd_device *obd, struct obd_uuid *uuid)
101 struct obd_device *res;
105 CWARN("%s: looking for client obd %s\n",
106 obd->obd_uuid.uuid, uuid->uuid);
108 for (i = 0; i < sizeof(types) / sizeof(char *); i++) {
109 res = class_find_client_obd(NULL, types[i], uuid);
116 static int cmobd_setup(struct obd_device *obd, obd_count len, void *buf)
118 struct obd_uuid master_uuid, cache_uuid;
119 struct lustre_handle conn = { 0 };
120 struct cm_obd *cmobd = &obd->u.cm;
121 struct lustre_cfg* lcfg = buf;
122 struct lustre_id mid, lid;
127 if (LUSTRE_CFG_BUFLEN(lcfg, 1) < 1) {
128 CERROR("%s: setup requires master device uuid\n",
133 if (LUSTRE_CFG_BUFLEN(lcfg, 2) < 1) {
134 CERROR("%s: setup requires cache device uuid\n",
139 obd_str2uuid(&master_uuid, lustre_cfg_string(lcfg, 1));
140 obd_str2uuid(&cache_uuid, lustre_cfg_string(lcfg, 2));
142 /* getting master obd */
143 cmobd->master_obd = cmobd_find_obd(obd, &master_uuid);
144 if (!cmobd->master_obd) {
145 CERROR("can't find master client obd by uuid %s\n",
150 /* getting cache obd */
151 cmobd->cache_obd = class_uuid2obd(&cache_uuid);
152 if (cmobd->cache_obd == NULL) {
153 CERROR("CMOBD: unable to find obd by uuid: %s\n",
158 /* connecting master */
159 memset(&conn, 0, sizeof(conn));
160 rc = obd_connect(&conn, cmobd->master_obd, &obd->obd_uuid,
161 NULL, OBD_OPT_REAL_CLIENT);
164 cmobd->master_exp = class_conn2export(&conn);
166 /* connecting cache */
167 memset(&conn, 0, sizeof(conn));
168 rc = class_connect(&conn, cmobd->cache_obd, &obd->obd_uuid);
170 GOTO(put_master, rc);
171 cmobd->cache_exp = class_conn2export(&conn);
173 if (cmobd_dt_obd(cmobd->master_exp->exp_obd)) {
174 /* for master dt device remove the recovery flag. */
175 rc = obd_set_info(cmobd->master_exp, strlen("unrecovery"),
176 "unrecovery", 0, NULL);
180 rc = cmobd_init_write_srv(obd);
184 cmobd_init_ea_size(obd);
185 cmobd->write_srv = NULL;
188 if (cmobd_md_obd(cmobd->master_exp->exp_obd)) {
190 * making sure, that both obds are ready. This is especially
191 * important in the case of using LMV as master.
193 rc = obd_getready(cmobd->master_exp);
195 CERROR("can't get %s obd ready.\n",
200 rc = obd_getready(cmobd->cache_exp);
202 CERROR("can't get %s obd ready.\n",
208 * requesting master obd to have its root inode store cookie to
209 * be able to save it to local root inode EA.
211 valsize = sizeof(struct lustre_id);
213 rc = obd_get_info(cmobd->master_exp, strlen("rootid"),
214 "rootid", &valsize, &mid);
216 CERROR("can't get rootid from master MDS %s, "
217 "err= %d.\n", master_uuid.uuid, rc);
222 * getting rootid from cache MDS. It is needed to update local
223 * (cache) root inode by rootid value from master obd.
225 rc = obd_get_info(cmobd->cache_exp, strlen("rootid"),
226 "rootid", &valsize, &lid);
228 CERROR("can't get rootid from local MDS %s, "
229 "err= %d.\n", cache_uuid.uuid, rc);
233 /* storing master MDS rootid to local root inode EA. */
234 CWARN("storing "DLID4" to local inode "DLID4".\n",
235 OLID4(&mid), OLID4(&lid));
237 rc = mds_update_mid(cmobd->cache_exp->exp_obd, &lid,
240 CERROR("can't update local root inode by ID "
241 "from master MDS %s, err = %d.\n",
242 master_uuid.uuid, rc);
249 class_disconnect(cmobd->cache_exp, 0);
251 obd_disconnect(cmobd->master_exp, 0);
255 static int cmobd_cleanup(struct obd_device *obd, int flags)
257 struct cm_obd *cmobd = &obd->u.cm;
261 if (cmobd->write_srv)
262 cmobd_cleanup_write_srv(obd);
264 rc = obd_disconnect(cmobd->master_exp, flags);
266 CERROR("error disconnecting master, err %d\n",
270 rc = class_disconnect(cmobd->cache_exp, flags);
272 CERROR("error disconnecting cache, err %d\n",
279 static int cmobd_iocontrol(unsigned int cmd, struct obd_export *exp,
280 int len, void *karg, void *uarg)
282 struct obd_device *obd = exp->exp_obd;
287 case OBD_IOC_CMOBD_SYNC: /* trigger reintegration */
288 rc = cmobd_reintegrate(obd);
291 CERROR("unrecognized ioctl %#x\n", cmd);
299 static struct obd_ops cmobd_ops = {
300 .o_owner = THIS_MODULE,
301 .o_attach = cmobd_attach,
302 .o_detach = cmobd_detach,
303 .o_setup = cmobd_setup,
304 .o_cleanup = cmobd_cleanup,
305 .o_iocontrol = cmobd_iocontrol,
308 kmem_cache_t *cmobd_extent_slab;
310 static int __init cmobd_init(void)
312 struct lprocfs_static_vars lvars;
316 printk(KERN_INFO "Lustre: Cache Manager OBD driver; info@clusterfs.com\n");
318 lprocfs_init_vars(cmobd, &lvars);
319 rc = class_register_type(&cmobd_ops, NULL, lvars.module_vars,
320 OBD_CMOBD_DEVICENAME);
323 cmobd_extent_slab = kmem_cache_create("cmobd_extents",
324 sizeof(struct cmobd_extent_info), 0,
325 SLAB_HWCACHE_ALIGN, NULL, NULL);
326 if (cmobd_extent_slab == NULL) {
327 class_unregister_type(OBD_CMOBD_DEVICENAME);
333 static void __exit cmobd_exit(void)
335 class_unregister_type(OBD_CMOBD_DEVICENAME);
336 if (kmem_cache_destroy(cmobd_extent_slab) != 0)
337 CERROR("couldn't free cmobd extent slab\n");
340 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
341 MODULE_DESCRIPTION("Lustre Cache Manager OBD driver");
342 MODULE_LICENSE("GPL");
344 module_init(cmobd_init);
345 module_exit(cmobd_exit);