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_COBD
24 #include <linux/version.h>
25 #if (LINUX_VERSION_CODE > KERNEL_VERSION(2,5,0))
26 #include <linux/init.h>
28 #include <linux/obd_support.h>
29 #include <linux/lustre_lib.h>
30 #include <linux/lustre_net.h>
31 #include <linux/lustre_idl.h>
32 #include <linux/obd_class.h>
33 #include <linux/obd_cache.h>
35 static int cobd_attach(struct obd_device *dev, obd_count len, void *data)
37 struct lprocfs_static_vars lvars;
39 lprocfs_init_vars(&lvars);
40 return lprocfs_obd_attach(dev, lvars.obd_vars);
43 static int cobd_detach(struct obd_device *dev)
45 return lprocfs_obd_detach(dev);
49 cobd_setup (struct obd_device *dev, obd_count len, void *buf)
51 struct obd_ioctl_data *data = (struct obd_ioctl_data *)buf;
52 struct cache_obd *cobd = &dev->u.cobd;
53 struct obd_device *target;
54 struct obd_device *cache;
55 struct obd_uuid target_uuid;
56 struct obd_uuid cache_uuid;
59 if (data->ioc_inlbuf1 == NULL ||
60 data->ioc_inlbuf2 == NULL)
63 obd_str2uuid(&target_uuid, data->ioc_inlbuf1);
64 target = class_uuid2obd (&target_uuid);
66 obd_str2uuid(&cache_uuid, data->ioc_inlbuf2);
67 cache = class_uuid2obd (&cache_uuid);
72 /* don't bother checking attached/setup;
73 * obd_connect() should, and it can change underneath us */
74 rc = obd_connect (&cobd->cobd_target, target, &target_uuid);
78 rc = obd_connect (&cobd->cobd_cache, cache, &cache_uuid);
85 obd_disconnect (&cobd->cobd_target, 0 );
90 cobd_cleanup (struct obd_device *dev, int force, int failover)
92 struct cache_obd *cobd = &dev->u.cobd;
95 if (!list_empty (&dev->obd_exports))
98 rc = obd_disconnect (&cobd->cobd_cache, failover);
100 CERROR ("error %d disconnecting cache\n", rc);
102 rc = obd_disconnect (&cobd->cobd_target, failover);
104 CERROR ("error %d disconnecting target\n", rc);
110 cobd_connect (struct lustre_handle *conn, struct obd_device *obd,
111 struct obd_uuid *cluuid)
113 int rc = class_connect (conn, obd, cluuid);
115 CERROR ("rc %d\n", rc);
120 cobd_disconnect (struct lustre_handle *conn, int failover)
122 int rc = class_disconnect (conn, failover);
124 CERROR ("rc %d\n", rc);
129 cobd_get_info(struct lustre_handle *conn, obd_count keylen,
130 void *key, __u32 *vallen, void *val)
132 struct obd_device *obd = class_conn2obd(conn);
133 struct cache_obd *cobd;
136 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
142 /* intercept cache utilisation info? */
144 return obd_get_info(&cobd->cobd_target, keylen, key, vallen, val);
148 cobd_statfs(struct lustre_handle *conn, struct obd_statfs *osfs)
150 struct obd_device *obd = class_conn2obd(conn);
151 struct cache_obd *cobd;
154 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
159 return (obd_statfs (&cobd->cobd_target, osfs));
163 cobd_getattr(struct lustre_handle *conn, struct obdo *oa,
164 struct lov_stripe_md *lsm)
166 struct obd_device *obd = class_conn2obd(conn);
167 struct cache_obd *cobd;
170 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
175 return (obd_getattr (&cobd->cobd_target, oa, lsm));
179 cobd_open(struct lustre_handle *conn, struct obdo *oa,
180 struct lov_stripe_md *lsm, struct obd_trans_info *oti,
181 struct obd_client_handle *och)
183 struct obd_device *obd = class_conn2obd(conn);
184 struct cache_obd *cobd;
187 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
192 return (obd_open (&cobd->cobd_target, oa, lsm, oti, och));
196 cobd_close(struct lustre_handle *conn, struct obdo *oa,
197 struct lov_stripe_md *lsm, struct obd_trans_info *oti)
199 struct obd_device *obd = class_conn2obd(conn);
200 struct cache_obd *cobd;
203 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
208 return (obd_close (&cobd->cobd_target, oa, lsm, oti));
211 static int cobd_preprw(int cmd, struct obd_export *exp,
212 int objcount, struct obd_ioobj *obj,
213 int niocount, struct niobuf_remote *nb,
214 struct niobuf_local *res, void **desc_private,
215 struct obd_trans_info *oti)
217 struct obd_export *cobd_exp;
220 if (exp->exp_obd == NULL)
223 if ((cmd & OBD_BRW_WRITE) != 0)
226 cobd_exp = class_conn2export(&exp->exp_obd->u.cobd.cobd_target);
227 rc = obd_preprw(cmd, cobd_exp, objcount, obj, niocount, nb, res,
229 class_export_put(cobd_exp);
233 static int cobd_commitrw(int cmd, struct obd_export *exp,
234 int objcount, struct obd_ioobj *obj,
235 int niocount, struct niobuf_local *local,
236 void *desc_private, struct obd_trans_info *oti)
238 struct obd_export *cobd_exp;
241 if (exp->exp_obd == NULL)
244 if ((cmd & OBD_BRW_WRITE) != 0)
247 cobd_exp = class_conn2export(&exp->exp_obd->u.cobd.cobd_target);
248 rc = obd_commitrw(cmd, cobd_exp, objcount, obj, niocount, local,
250 class_export_put(cobd_exp);
255 cobd_brw(int cmd, struct lustre_handle *conn,
256 struct lov_stripe_md *lsm, obd_count oa_bufs,
257 struct brw_page *pga, struct obd_trans_info *oti)
259 struct obd_device *obd = class_conn2obd(conn);
260 struct cache_obd *cobd;
263 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
267 if ((cmd & OBD_BRW_WRITE) != 0)
271 return (obd_brw (cmd, &cobd->cobd_target,
272 lsm, oa_bufs, pga, oti));
276 cobd_iocontrol(unsigned int cmd, struct lustre_handle *conn, int len,
277 void *karg, void *uarg)
279 struct obd_device *obd = class_conn2obd(conn);
280 struct cache_obd *cobd;
283 CERROR("invalid client cookie "LPX64"\n", conn->cookie);
290 return (obd_iocontrol (cmd, &cobd->cobd_target, len, karg, uarg));
293 static struct obd_ops cobd_ops = {
294 o_owner: THIS_MODULE,
295 o_attach: cobd_attach,
296 o_detach: cobd_detach,
299 o_cleanup: cobd_cleanup,
301 o_connect: cobd_connect,
302 o_disconnect: cobd_disconnect,
304 o_get_info: cobd_get_info,
305 o_statfs: cobd_statfs,
307 o_getattr: cobd_getattr,
310 o_preprw: cobd_preprw,
311 o_commitrw: cobd_commitrw,
313 o_iocontrol: cobd_iocontrol,
316 static int __init cobd_init(void)
318 struct lprocfs_static_vars lvars;
321 printk(KERN_INFO "Lustre Caching OBD driver; info@clusterfs.com\n");
323 lprocfs_init_vars(&lvars);
324 RETURN(class_register_type(&cobd_ops, lvars.module_vars,
325 OBD_CACHE_DEVICENAME));
328 static void __exit cobd_exit(void)
330 class_unregister_type(OBD_CACHE_DEVICENAME);
333 MODULE_AUTHOR("Cluster File Systems, Inc. <info@clusterfs.com>");
334 MODULE_DESCRIPTION("Lustre Caching OBD driver");
335 MODULE_LICENSE("GPL");
337 module_init(cobd_init);
338 module_exit(cobd_exit);