lustre/mdc/mdc_request.c

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  *
   4  * Copyright (C) 2001, 2002 Cluster File Systems, Inc.
   5  *
   6  *   This file is part of Lustre, http://www.sf.net/projects/lustre/
   7  *
   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.
  11  *
  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.
  16  *
  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.
  20  *
  21  */
  22
  23 #define EXPORT_SYMTAB
  24
  25 #include <linux/module.h>
  26 #include <linux/miscdevice.h>
  27
  28 #define DEBUG_SUBSYSTEM S_MDC
  29
  30 #include <linux/lustre_mds.h>
  31 #include <linux/lustre_lite.h>
  32
  33 #define REQUEST_MINOR 244
  34
  35 extern int mds_queue_req(struct ptlrpc_request *);
  36
  37 int mdc_connect(struct ptlrpc_client *cl, struct ptlrpc_connection *conn,
  38                 struct ll_fid *rootfid, __u64 *last_committed, __u64 *last_rcvd,
  39                 __u32 *last_xid, struct ptlrpc_request **request)
  40 {
  41         struct ptlrpc_request *req;
  42         struct mds_body *body;
  43         int rc, size = sizeof(*body);
  44         ENTRY;
  45
  46         req = ptlrpc_prep_req(cl, conn, MDS_CONNECT, 1, &size, NULL);
  47         if (!req)
  48                 GOTO(out, rc = -ENOMEM);
  49
  50         body = lustre_msg_buf(req->rq_reqmsg, 0);
  51         req->rq_level = LUSTRE_CONN_CON;
  52         req->rq_replen = lustre_msg_size(1, &size);
  53
  54         mds_pack_req_body(req);
  55         rc = ptlrpc_queue_wait(req);
  56         rc = ptlrpc_check_status(req, rc);
  57
  58         if (!rc) {
  59                 mds_unpack_rep_body(req);
  60                 body = lustre_msg_buf(req->rq_repmsg, 0);
  61                 memcpy(rootfid, &body->fid1, sizeof(*rootfid));
  62                 *last_committed = req->rq_repmsg->last_committed;
  63                 *last_rcvd = req->rq_repmsg->last_rcvd;
  64                 *last_xid = body->last_xid;
  65
  66                 CDEBUG(D_NET, "root ino=%ld, last_committed=%Lu, last_rcvd=%Lu,"
  67                        " last_xid=%d\n",
  68                        (unsigned long)rootfid->id,
  69                        (unsigned long long)*last_committed,
  70                        (unsigned long long)*last_rcvd,
  71                        body->last_xid);
  72         }
  73
  74         EXIT;
  75  out:
  76         ptlrpc_free_req(req);
  77         return rc;
  78 }
  79
  80
  81 int mdc_getattr(struct ptlrpc_client *cl, struct ptlrpc_connection *conn,
  82                 ino_t ino, int type, unsigned long valid,
  83                 struct ptlrpc_request **request)
  84 {
  85         struct ptlrpc_request *req;
  86         struct mds_body *body;
  87         int rc, size = sizeof(*body);
  88         ENTRY;
  89
  90         req = ptlrpc_prep_req(cl, conn, MDS_GETATTR, 1, &size, NULL);
  91         if (!req)
  92                 GOTO(out, rc = -ENOMEM);
  93
  94         body = lustre_msg_buf(req->rq_reqmsg, 0);
  95         ll_ino2fid(&body->fid1, ino, 0, type);
  96         body->valid = valid;
  97
  98         req->rq_replen = lustre_msg_size(1, &size);
  99         req->rq_level = LUSTRE_CONN_FULL;
 100
 101         rc = ptlrpc_queue_wait(req);
 102         rc = ptlrpc_check_status(req, rc);
 103
 104         if (!rc) {
 105                 mds_unpack_rep_body(req);
 106                 body = lustre_msg_buf(req->rq_repmsg, 0);
 107                 CDEBUG(D_NET, "mode: %o\n", body->mode);
 108         }
 109
 110         EXIT;
 111  out:
 112         *request = req;
 113         return rc;
 114 }
 115
 116 int mdc_open(struct ptlrpc_client *cl, struct ptlrpc_connection *conn,
 117              ino_t ino, int type, int flags, __u64 cookie, __u64 *fh,
 118              struct ptlrpc_request **request)
 119 {
 120         struct mds_body *body;
 121         int rc, size = sizeof(*body);
 122         struct ptlrpc_request *req;
 123
 124         req = ptlrpc_prep_req(cl, conn, MDS_OPEN, 1, &size, NULL);
 125         if (!req)
 126                 GOTO(out, rc = -ENOMEM);
 127
 128         req->rq_flags |= PTL_RPC_FL_REPLAY;
 129         req->rq_level = LUSTRE_CONN_FULL;
 130         body = lustre_msg_buf(req->rq_reqmsg, 0);
 131         ll_ino2fid(&body->fid1, ino, 0, type);
 132         body->flags = HTON__u32(flags);
 133         body->objid = cookie;
 134
 135         req->rq_replen = lustre_msg_size(1, &size);
 136
 137         rc = ptlrpc_queue_wait(req);
 138         rc = ptlrpc_check_status(req, rc);
 139
 140         if (!rc) {
 141                 mds_unpack_rep_body(req);
 142                 body = lustre_msg_buf(req->rq_repmsg, 0);
 143                 *fh = body->objid;
 144         }
 145
 146         EXIT;
 147  out:
 148         *request = req;
 149         return rc;
 150 }
 151
 152 int mdc_close(struct ptlrpc_client *cl, struct ptlrpc_connection *conn,
 153               ino_t ino, int type, __u64 fh, struct ptlrpc_request **request)
 154 {
 155         struct mds_body *body;
 156         int rc, size = sizeof(*body);
 157         struct ptlrpc_request *req;
 158
 159         req = ptlrpc_prep_req(cl, conn, MDS_CLOSE, 1, &size, NULL);
 160         if (!req)
 161                 GOTO(out, rc = -ENOMEM);
 162
 163         body = lustre_msg_buf(req->rq_reqmsg, 0);
 164         ll_ino2fid(&body->fid1, ino, 0, type);
 165         body->objid = fh;
 166
 167         req->rq_level = LUSTRE_CONN_FULL;
 168         req->rq_replen = lustre_msg_size(0, NULL);
 169
 170         rc = ptlrpc_queue_wait(req);
 171         rc = ptlrpc_check_status(req, rc);
 172
 173         EXIT;
 174  out:
 175         *request = req;
 176         return rc;
 177 }
 178
 179 int mdc_readpage(struct ptlrpc_client *cl, struct ptlrpc_connection *conn,
 180                  ino_t ino, int type, __u64 offset, char *addr,
 181                  struct ptlrpc_request **request)
 182 {
 183         struct ptlrpc_request *req = NULL;
 184         struct ptlrpc_bulk_desc *bulk = NULL;
 185         struct niobuf niobuf;
 186         struct mds_body *body;
 187         int rc, size[2] = {sizeof(*body), sizeof(struct niobuf)};
 188         char *bufs[2] = {NULL, (char *)&niobuf};
 189
 190         niobuf.addr = (__u64) (long) addr;
 191
 192         CDEBUG(D_INODE, "inode: %ld\n", (long)ino);
 193
 194         bulk = ptlrpc_prep_bulk(conn);
 195         if (bulk == NULL) {
 196                 CERROR("%s: cannot init bulk desc\n", __FUNCTION__);
 197                 rc = -ENOMEM;
 198                 goto out;
 199         }
 200
 201         req = ptlrpc_prep_req(cl, conn, MDS_READPAGE, 2, size, bufs);
 202         if (!req)
 203                 GOTO(out, rc = -ENOMEM);
 204
 205         bulk->b_buflen = PAGE_SIZE;
 206         bulk->b_buf = (void *)(long)niobuf.addr;
 207         bulk->b_portal = MDS_BULK_PORTAL;
 208         bulk->b_xid = req->rq_reqmsg->xid;
 209
 210         rc = ptlrpc_register_bulk(bulk);
 211         if (rc) {
 212                 CERROR("couldn't setup bulk sink: error %d.\n", rc);
 213                 GOTO(out, rc);
 214         }
 215
 216         body = lustre_msg_buf(req->rq_reqmsg, 0);
 217         body->fid1.id = ino;
 218         body->fid1.f_type = type;
 219         body->size = offset;
 220
 221         req->rq_replen = lustre_msg_size(1, size);
 222         req->rq_level = LUSTRE_CONN_FULL;
 223         rc = ptlrpc_queue_wait(req);
 224         if (rc) {
 225                 CERROR("error in handling %d\n", rc);
 226                 ptlrpc_abort_bulk(bulk);
 227                 GOTO(out, rc);
 228         }
 229
 230         mds_unpack_rep_body(req);
 231         EXIT;
 232
 233  out:
 234         *request = req;
 235         ptlrpc_free_bulk(bulk);
 236         return rc;
 237 }
 238
 239 static int request_ioctl(struct inode *inode, struct file *file,
 240                          unsigned int cmd, unsigned long arg)
 241 {
 242         int err = 0;
 243         struct ptlrpc_client cl;
 244         struct ptlrpc_connection *conn;
 245         struct ptlrpc_request *request;
 246
 247         ENTRY;
 248
 249         if (MINOR(inode->i_rdev) != REQUEST_MINOR)
 250                 RETURN(-EINVAL);
 251
 252         if (_IOC_TYPE(cmd) != IOC_REQUEST_TYPE ||
 253             _IOC_NR(cmd) < IOC_REQUEST_MIN_NR  ||
 254             _IOC_NR(cmd) > IOC_REQUEST_MAX_NR ) {
 255                 CDEBUG(D_IOCTL, "invalid ioctl ( type %d, nr %d, size %d )\n",
 256                        _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd));
 257                 RETURN(-EINVAL);
 258         }
 259
 260         ptlrpc_init_client(NULL, NULL,
 261                            MDS_REQUEST_PORTAL, MDC_REPLY_PORTAL, &cl);
 262         conn = ptlrpc_uuid_to_connection("mds");
 263         if (!conn) {
 264                 CERROR("cannot create client\n");
 265                 RETURN(-EINVAL);
 266         }
 267
 268         switch (cmd) {
 269         case IOC_REQUEST_GETATTR: {
 270                 CERROR("-- getting attr for ino %lu\n", arg);
 271                 err = mdc_getattr(&cl, conn, arg, S_IFDIR, ~0, &request);
 272                 CERROR("-- done err %d\n", err);
 273
 274                 GOTO(out, err);
 275         }
 276
 277         case IOC_REQUEST_READPAGE: {
 278                 char *buf;
 279                 OBD_ALLOC(buf, PAGE_SIZE);
 280                 if (!buf) {
 281                         err = -ENOMEM;
 282                         GOTO(out, err);
 283                 }
 284                 CERROR("-- readpage 0 for ino %lu\n", arg);
 285                 err = mdc_readpage(&cl, conn, arg, S_IFDIR, 0, buf, &request);
 286                 CERROR("-- done err %d\n", err);
 287                 OBD_FREE(buf, PAGE_SIZE);
 288
 289                 GOTO(out, err);
 290         }
 291
 292         case IOC_REQUEST_SETATTR: {
 293                 struct inode inode;
 294                 struct iattr iattr;
 295
 296                 inode.i_ino = arg;
 297                 inode.i_generation = 0;
 298                 iattr.ia_mode = 040777;
 299                 iattr.ia_atime = 0;
 300                 iattr.ia_valid = ATTR_MODE | ATTR_ATIME;
 301
 302                 err = mdc_setattr(&cl, conn, &inode, &iattr, &request);
 303                 CERROR("-- done err %d\n", err);
 304
 305                 GOTO(out, err);
 306         }
 307
 308         case IOC_REQUEST_CREATE: {
 309                 struct inode inode;
 310                 struct iattr iattr;
 311
 312                 inode.i_ino = arg;
 313                 inode.i_generation = 0;
 314                 iattr.ia_mode = 040777;
 315                 iattr.ia_atime = 0;
 316                 iattr.ia_valid = ATTR_MODE | ATTR_ATIME;
 317
 318                 err = mdc_create(&cl, conn, &inode,
 319                                  "foofile", strlen("foofile"),
 320                                  NULL, 0, 0100707, 47114711,
 321                                  11, 47, 0, &request);
 322                 CERROR("-- done err %d\n", err);
 323
 324                 GOTO(out, err);
 325         }
 326
 327         case IOC_REQUEST_OPEN: {
 328                 __u64 fh, ino;
 329                 copy_from_user(&ino, (__u64 *)arg, sizeof(ino));
 330                 CERROR("-- opening ino %llu\n", (unsigned long long)ino);
 331                 err = mdc_open(&cl, conn, ino, S_IFDIR, O_RDONLY, 4711, &fh,
 332                                &request);
 333                 copy_to_user((__u64 *)arg, &fh, sizeof(fh));
 334                 CERROR("-- done err %d (fh=%Lu)\n", err,
 335                        (unsigned long long)fh);
 336
 337                 GOTO(out, err);
 338         }
 339
 340         case IOC_REQUEST_CLOSE: {
 341                 CERROR("-- closing ino 2, filehandle %lu\n", arg);
 342                 err = mdc_close(&cl, conn, 2, S_IFDIR, arg, &request);
 343                 CERROR("-- done err %d\n", err);
 344
 345                 GOTO(out, err);
 346         }
 347
 348         default:
 349                 GOTO(out, err = -EINVAL);
 350         }
 351
 352  out:
 353         ptlrpc_free_req(request);
 354         ptlrpc_put_connection(conn);
 355         ptlrpc_cleanup_client(&cl);
 356
 357         RETURN(err);
 358 }
 359
 360
 361 static struct file_operations requestdev_fops = {
 362         ioctl: request_ioctl,
 363 };
 364
 365 static struct miscdevice request_dev = {
 366         REQUEST_MINOR,
 367         "request",
 368         &requestdev_fops
 369 };
 370
 371 static int __init ptlrpc_request_init(void)
 372 {
 373         misc_register(&request_dev);
 374         return 0;
 375 }
 376
 377 static void __exit ptlrpc_request_exit(void)
 378 {
 379         misc_deregister(&request_dev);
 380 }
 381
 382 MODULE_AUTHOR("Peter J. Braam <braam@clusterfs.com>");
 383 MODULE_DESCRIPTION("Lustre MDS Request Tester v1.0");
 384 MODULE_LICENSE("GPL");
 385
 386 EXPORT_SYMBOL(mdc_connect);
 387 EXPORT_SYMBOL(mdc_getattr);
 388 EXPORT_SYMBOL(mdc_create);
 389 EXPORT_SYMBOL(mdc_unlink);
 390 EXPORT_SYMBOL(mdc_rename);
 391 EXPORT_SYMBOL(mdc_link);
 392 EXPORT_SYMBOL(mdc_readpage);
 393 EXPORT_SYMBOL(mdc_setattr);
 394 EXPORT_SYMBOL(mdc_close);
 395 EXPORT_SYMBOL(mdc_open);
 396
 397 module_init(ptlrpc_request_init);
 398 module_exit(ptlrpc_request_exit);