1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
5 * Author: Peter J. Braam <braam@clusterfs.com>
6 * Author: Phil Schwan <phil@clusterfs.com>
8 * This file is part of Lustre, http://www.lustre.org.
10 * Lustre is free software; you can redistribute it and/or
11 * modify it under the terms of version 2 of the GNU General Public
12 * License as published by the Free Software Foundation.
14 * Lustre is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with Lustre; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
23 * Storage Target Handling functions
24 * Lustre Object Server Module (OST)
26 * This server is single threaded at present (but can easily be multi
27 * threaded). For testing and management it is treated as an
28 * obd_device, although it does not export a full OBD method table
29 * (the requests are coming in over the wire, so object target
30 * modules do not have a full method table.)
34 #define DEBUG_SUBSYSTEM S_OST
36 #include <linux/module.h>
37 #include <linux/obd_ost.h>
38 #include <linux/lustre_net.h>
39 #include <linux/lustre_dlm.h>
41 struct client_obd *client_conn2cli(struct lustre_handle *conn)
43 struct obd_export *export = class_conn2export(conn);
46 return &export->exp_obd->u.cli;
49 int client_obd_setup(struct obd_device *obddev, obd_count len, void *buf)
51 struct obd_ioctl_data* data = buf;
52 int rq_portal = (obddev->obd_type->typ_ops->o_brw) ? OST_REQUEST_PORTAL : MDS_REQUEST_PORTAL;
53 int rp_portal = (obddev->obd_type->typ_ops->o_brw) ? OSC_REPLY_PORTAL : MDC_REPLY_PORTAL;
54 struct client_obd *mdc = &obddev->u.cli;
59 if (data->ioc_inllen1 < 1) {
60 CERROR("requires a TARGET UUID\n");
64 if (data->ioc_inllen1 > 37) {
65 CERROR("client UUID must be less than 38 characters\n");
69 if (data->ioc_inllen2 < 1) {
70 CERROR("setup requires a SERVER UUID\n");
74 if (data->ioc_inllen2 > 37) {
75 CERROR("target UUID must be less than 38 characters\n");
79 sema_init(&mdc->cl_sem, 1);
80 mdc->cl_conn_count = 0;
81 memcpy(mdc->cl_target_uuid, data->ioc_inlbuf1, data->ioc_inllen1);
82 memcpy(server_uuid, data->ioc_inlbuf2, MIN(data->ioc_inllen2,
83 sizeof(server_uuid)));
85 mdc->cl_conn = ptlrpc_uuid_to_connection(server_uuid);
89 OBD_ALLOC(mdc->cl_client, sizeof(*mdc->cl_client));
90 if (mdc->cl_client == NULL)
91 GOTO(out_conn, rc = -ENOMEM);
93 OBD_ALLOC(mdc->cl_ldlm_client, sizeof(*mdc->cl_ldlm_client));
94 if (mdc->cl_ldlm_client == NULL)
95 GOTO(out_client, rc = -ENOMEM);
97 ptlrpc_init_client(rq_portal, rp_portal, mdc->cl_client, mdc->cl_conn);
98 ptlrpc_init_client(LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
99 mdc->cl_ldlm_client, mdc->cl_conn);
100 mdc->cl_client->cli_name = "mdc";
101 mdc->cl_ldlm_client->cli_name = "ldlm";
102 mdc->cl_max_mdsize = sizeof(struct lov_mds_md);
108 OBD_FREE(mdc->cl_client, sizeof(*mdc->cl_client));
110 ptlrpc_put_connection(mdc->cl_conn);
114 int client_obd_cleanup(struct obd_device * obddev)
116 struct client_obd *mdc = &obddev->u.cli;
118 ptlrpc_cleanup_client(mdc->cl_client);
119 OBD_FREE(mdc->cl_client, sizeof(*mdc->cl_client));
120 ptlrpc_cleanup_client(mdc->cl_ldlm_client);
121 OBD_FREE(mdc->cl_ldlm_client, sizeof(*mdc->cl_ldlm_client));
122 ptlrpc_put_connection(mdc->cl_conn);
128 int client_obd_connect(struct lustre_handle *conn, struct obd_device *obd,
131 struct client_obd *cli = &obd->u.cli;
132 struct ptlrpc_request *request;
133 int rc, size[] = {sizeof(cli->cl_target_uuid),
134 sizeof(obd->obd_uuid) };
135 char *tmp[] = {cli->cl_target_uuid, obd->obd_uuid};
136 int rq_opc = (obd->obd_type->typ_ops->o_brw) ? OST_CONNECT :MDS_CONNECT;
141 rc = class_connect(conn, obd, cluuid);
147 cli->cl_conn_count++;
148 if (cli->cl_conn_count > 1)
151 obd->obd_namespace = ldlm_namespace_new(obd->obd_name,
152 LDLM_NAMESPACE_CLIENT);
153 if (obd->obd_namespace == NULL)
154 GOTO(out_disco, rc = -ENOMEM);
156 request = ptlrpc_prep_req(cli->cl_client, rq_opc, 2, size, tmp);
158 GOTO(out_ldlm, rc = -ENOMEM);
160 request->rq_level = LUSTRE_CONN_NEW;
161 request->rq_replen = lustre_msg_size(0, NULL);
162 // This handle may be important if a callback needs
163 // to find the mdc/osc
164 // request->rq_reqmsg->addr = conn->addr;
165 // request->rq_reqmsg->cookie = conn->cookie;
167 rc = ptlrpc_queue_wait(request);
168 rc = ptlrpc_check_status(request, rc);
172 request->rq_connection->c_level = LUSTRE_CONN_FULL;
173 cli->cl_exporth = *(struct lustre_handle *)request->rq_repmsg;
177 ptlrpc_free_req(request);
180 ldlm_namespace_free(obd->obd_namespace);
181 obd->obd_namespace = NULL;
183 class_disconnect(conn);
191 int client_obd_disconnect(struct lustre_handle *conn)
193 struct obd_device *obd = class_conn2obd(conn);
194 struct client_obd *cli = &obd->u.cli;
195 int rq_opc = (obd->obd_type->typ_ops->o_brw) ? OST_DISCONNECT : MDS_DISCONNECT;
196 struct ptlrpc_request *request = NULL;
201 if (!cli->cl_conn_count) {
202 CERROR("disconnecting disconnected device (%s)\n",
204 GOTO(out_sem, rc = -EINVAL);
207 cli->cl_conn_count--;
208 if (cli->cl_conn_count)
209 GOTO(out_disco, rc = 0);
211 ldlm_namespace_free(obd->obd_namespace);
212 obd->obd_namespace = NULL;
213 request = ptlrpc_prep_req2(conn, rq_opc, 0, NULL, NULL);
215 GOTO(out_disco, rc = -ENOMEM);
217 request->rq_replen = lustre_msg_size(0, NULL);
219 rc = ptlrpc_queue_wait(request);
226 ptlrpc_free_req(request);
228 err = class_disconnect(conn);
237 int target_handle_connect(struct ptlrpc_request *req)
239 struct obd_device *target;
240 struct obd_export *export;
241 struct lustre_handle conn;
242 char *tgtuuid, *cluuid;
246 tgtuuid = lustre_msg_buf(req->rq_reqmsg, 0);
247 if (req->rq_reqmsg->buflens[0] > 37) {
248 CERROR("bad target UUID for connect\n");
249 GOTO(out, rc = -EINVAL);
252 cluuid = lustre_msg_buf(req->rq_reqmsg, 1);
253 if (req->rq_reqmsg->buflens[1] > 37) {
254 CERROR("bad client UUID for connect\n");
255 GOTO(out, rc = -EINVAL);
258 i = class_uuid2dev(tgtuuid);
260 CERROR("UUID '%s' not found for connect\n", tgtuuid);
261 GOTO(out, rc = -ENODEV);
264 target = &obd_dev[i];
266 GOTO(out, rc = -ENODEV);
268 conn.addr = req->rq_reqmsg->addr;
269 conn.cookie = req->rq_reqmsg->cookie;
271 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
275 rc = obd_connect(&conn, target, cluuid);
278 req->rq_repmsg->addr = conn.addr;
279 req->rq_repmsg->cookie = conn.cookie;
281 export = class_conn2export(&conn);
284 req->rq_export = export;
285 export->exp_connection = req->rq_connection;
286 ptlrpc_init_client(LDLM_REQUEST_PORTAL, LDLM_REPLY_PORTAL,
287 &export->exp_ldlm_data.led_client,
288 export->exp_connection);
290 #warning Peter: is this the right place to upgrade the server connection level?
291 req->rq_connection->c_level = LUSTRE_CONN_FULL;
297 int target_handle_disconnect(struct ptlrpc_request *req)
299 struct lustre_handle *conn = (struct lustre_handle *)req->rq_reqmsg;
303 rc = lustre_pack_msg(0, NULL, NULL, &req->rq_replen, &req->rq_repmsg);
307 req->rq_status = obd_disconnect(conn);