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