1 /* 2 * net/9p/clnt.c 3 * 4 * 9P Client 5 * 6 * Copyright (C) 2008 by Eric Van Hensbergen <ericvh@gmail.com> 7 * Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net> 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 11 * as published by the Free Software Foundation. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License 19 * along with this program; if not, write to: 20 * Free Software Foundation 21 * 51 Franklin Street, Fifth Floor 22 * Boston, MA 02111-1301 USA 23 * 24 */ 25 26 #include <linux/module.h> 27 #include <linux/errno.h> 28 #include <linux/fs.h> 29 #include <linux/poll.h> 30 #include <linux/idr.h> 31 #include <linux/mutex.h> 32 #include <linux/slab.h> 33 #include <linux/sched.h> 34 #include <linux/uaccess.h> 35 #include <net/9p/9p.h> 36 #include <linux/parser.h> 37 #include <net/9p/client.h> 38 #include <net/9p/transport.h> 39 #include "protocol.h" 40 41 /* 42 * Client Option Parsing (code inspired by NFS code) 43 * - a little lazy - parse all client options 44 */ 45 46 enum { 47 Opt_msize, 48 Opt_trans, 49 Opt_legacy, 50 Opt_version, 51 Opt_err, 52 }; 53 54 static const match_table_t tokens = { 55 {Opt_msize, "msize=%u"}, 56 {Opt_legacy, "noextend"}, 57 {Opt_trans, "trans=%s"}, 58 {Opt_version, "version=%s"}, 59 {Opt_err, NULL}, 60 }; 61 62 inline int p9_is_proto_dotl(struct p9_client *clnt) 63 { 64 return (clnt->proto_version == p9_proto_2000L); 65 } 66 EXPORT_SYMBOL(p9_is_proto_dotl); 67 68 inline int p9_is_proto_dotu(struct p9_client *clnt) 69 { 70 return (clnt->proto_version == p9_proto_2000u); 71 } 72 EXPORT_SYMBOL(p9_is_proto_dotu); 73 74 /* Interpret mount option for protocol version */ 75 static int get_protocol_version(const substring_t *name) 76 { 77 int version = -EINVAL; 78 79 if (!strncmp("9p2000", name->from, name->to-name->from)) { 80 version = p9_proto_legacy; 81 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: Legacy\n"); 82 } else if (!strncmp("9p2000.u", name->from, name->to-name->from)) { 83 version = p9_proto_2000u; 84 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.u\n"); 85 } else if (!strncmp("9p2000.L", name->from, name->to-name->from)) { 86 version = p9_proto_2000L; 87 P9_DPRINTK(P9_DEBUG_9P, "Protocol version: 9P2000.L\n"); 88 } else { 89 P9_DPRINTK(P9_DEBUG_ERROR, "Unknown protocol version %s. ", 90 name->from); 91 } 92 return version; 93 } 94 95 static struct p9_req_t * 96 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...); 97 98 /** 99 * parse_options - parse mount options into client structure 100 * @opts: options string passed from mount 101 * @clnt: existing v9fs client information 102 * 103 * Return 0 upon success, -ERRNO upon failure 104 */ 105 106 static int parse_opts(char *opts, struct p9_client *clnt) 107 { 108 char *options, *tmp_options; 109 char *p; 110 substring_t args[MAX_OPT_ARGS]; 111 int option; 112 int ret = 0; 113 114 clnt->proto_version = p9_proto_2000u; 115 clnt->msize = 8192; 116 117 if (!opts) 118 return 0; 119 120 tmp_options = kstrdup(opts, GFP_KERNEL); 121 if (!tmp_options) { 122 P9_DPRINTK(P9_DEBUG_ERROR, 123 "failed to allocate copy of option string\n"); 124 return -ENOMEM; 125 } 126 options = tmp_options; 127 128 while ((p = strsep(&options, ",")) != NULL) { 129 int token; 130 if (!*p) 131 continue; 132 token = match_token(p, tokens, args); 133 if (token < Opt_trans) { 134 int r = match_int(&args[0], &option); 135 if (r < 0) { 136 P9_DPRINTK(P9_DEBUG_ERROR, 137 "integer field, but no integer?\n"); 138 ret = r; 139 continue; 140 } 141 } 142 switch (token) { 143 case Opt_msize: 144 clnt->msize = option; 145 break; 146 case Opt_trans: 147 clnt->trans_mod = v9fs_get_trans_by_name(&args[0]); 148 if(clnt->trans_mod == NULL) { 149 P9_DPRINTK(P9_DEBUG_ERROR, 150 "Could not find request transport: %s\n", 151 (char *) &args[0]); 152 ret = -EINVAL; 153 goto free_and_return; 154 } 155 break; 156 case Opt_legacy: 157 clnt->proto_version = p9_proto_legacy; 158 break; 159 case Opt_version: 160 ret = get_protocol_version(&args[0]); 161 if (ret == -EINVAL) 162 goto free_and_return; 163 clnt->proto_version = ret; 164 break; 165 default: 166 continue; 167 } 168 } 169 170 free_and_return: 171 kfree(tmp_options); 172 return ret; 173 } 174 175 /** 176 * p9_tag_alloc - lookup/allocate a request by tag 177 * @c: client session to lookup tag within 178 * @tag: numeric id for transaction 179 * 180 * this is a simple array lookup, but will grow the 181 * request_slots as necessary to accomodate transaction 182 * ids which did not previously have a slot. 183 * 184 * this code relies on the client spinlock to manage locks, its 185 * possible we should switch to something else, but I'd rather 186 * stick with something low-overhead for the common case. 187 * 188 */ 189 190 static struct p9_req_t *p9_tag_alloc(struct p9_client *c, u16 tag) 191 { 192 unsigned long flags; 193 int row, col; 194 struct p9_req_t *req; 195 196 /* This looks up the original request by tag so we know which 197 * buffer to read the data into */ 198 tag++; 199 200 if (tag >= c->max_tag) { 201 spin_lock_irqsave(&c->lock, flags); 202 /* check again since original check was outside of lock */ 203 while (tag >= c->max_tag) { 204 row = (tag / P9_ROW_MAXTAG); 205 c->reqs[row] = kcalloc(P9_ROW_MAXTAG, 206 sizeof(struct p9_req_t), GFP_ATOMIC); 207 208 if (!c->reqs[row]) { 209 printk(KERN_ERR "Couldn't grow tag array\n"); 210 spin_unlock_irqrestore(&c->lock, flags); 211 return ERR_PTR(-ENOMEM); 212 } 213 for (col = 0; col < P9_ROW_MAXTAG; col++) { 214 c->reqs[row][col].status = REQ_STATUS_IDLE; 215 c->reqs[row][col].tc = NULL; 216 } 217 c->max_tag += P9_ROW_MAXTAG; 218 } 219 spin_unlock_irqrestore(&c->lock, flags); 220 } 221 row = tag / P9_ROW_MAXTAG; 222 col = tag % P9_ROW_MAXTAG; 223 224 req = &c->reqs[row][col]; 225 if (!req->tc) { 226 req->wq = kmalloc(sizeof(wait_queue_head_t), GFP_KERNEL); 227 if (!req->wq) { 228 printk(KERN_ERR "Couldn't grow tag array\n"); 229 return ERR_PTR(-ENOMEM); 230 } 231 init_waitqueue_head(req->wq); 232 req->tc = kmalloc(sizeof(struct p9_fcall)+c->msize, 233 GFP_KERNEL); 234 req->rc = kmalloc(sizeof(struct p9_fcall)+c->msize, 235 GFP_KERNEL); 236 if ((!req->tc) || (!req->rc)) { 237 printk(KERN_ERR "Couldn't grow tag array\n"); 238 kfree(req->tc); 239 kfree(req->rc); 240 kfree(req->wq); 241 req->tc = req->rc = NULL; 242 req->wq = NULL; 243 return ERR_PTR(-ENOMEM); 244 } 245 req->tc->sdata = (char *) req->tc + sizeof(struct p9_fcall); 246 req->tc->capacity = c->msize; 247 req->rc->sdata = (char *) req->rc + sizeof(struct p9_fcall); 248 req->rc->capacity = c->msize; 249 } 250 251 p9pdu_reset(req->tc); 252 p9pdu_reset(req->rc); 253 254 req->tc->tag = tag-1; 255 req->status = REQ_STATUS_ALLOC; 256 257 return &c->reqs[row][col]; 258 } 259 260 /** 261 * p9_tag_lookup - lookup a request by tag 262 * @c: client session to lookup tag within 263 * @tag: numeric id for transaction 264 * 265 */ 266 267 struct p9_req_t *p9_tag_lookup(struct p9_client *c, u16 tag) 268 { 269 int row, col; 270 271 /* This looks up the original request by tag so we know which 272 * buffer to read the data into */ 273 tag++; 274 275 BUG_ON(tag >= c->max_tag); 276 277 row = tag / P9_ROW_MAXTAG; 278 col = tag % P9_ROW_MAXTAG; 279 280 return &c->reqs[row][col]; 281 } 282 EXPORT_SYMBOL(p9_tag_lookup); 283 284 /** 285 * p9_tag_init - setup tags structure and contents 286 * @c: v9fs client struct 287 * 288 * This initializes the tags structure for each client instance. 289 * 290 */ 291 292 static int p9_tag_init(struct p9_client *c) 293 { 294 int err = 0; 295 296 c->tagpool = p9_idpool_create(); 297 if (IS_ERR(c->tagpool)) { 298 err = PTR_ERR(c->tagpool); 299 c->tagpool = NULL; 300 goto error; 301 } 302 303 p9_idpool_get(c->tagpool); /* reserve tag 0 */ 304 305 c->max_tag = 0; 306 error: 307 return err; 308 } 309 310 /** 311 * p9_tag_cleanup - cleans up tags structure and reclaims resources 312 * @c: v9fs client struct 313 * 314 * This frees resources associated with the tags structure 315 * 316 */ 317 static void p9_tag_cleanup(struct p9_client *c) 318 { 319 int row, col; 320 321 /* check to insure all requests are idle */ 322 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { 323 for (col = 0; col < P9_ROW_MAXTAG; col++) { 324 if (c->reqs[row][col].status != REQ_STATUS_IDLE) { 325 P9_DPRINTK(P9_DEBUG_MUX, 326 "Attempting to cleanup non-free tag %d,%d\n", 327 row, col); 328 /* TODO: delay execution of cleanup */ 329 return; 330 } 331 } 332 } 333 334 if (c->tagpool) 335 p9_idpool_destroy(c->tagpool); 336 337 /* free requests associated with tags */ 338 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { 339 for (col = 0; col < P9_ROW_MAXTAG; col++) { 340 kfree(c->reqs[row][col].wq); 341 kfree(c->reqs[row][col].tc); 342 kfree(c->reqs[row][col].rc); 343 } 344 kfree(c->reqs[row]); 345 } 346 c->max_tag = 0; 347 } 348 349 /** 350 * p9_free_req - free a request and clean-up as necessary 351 * c: client state 352 * r: request to release 353 * 354 */ 355 356 static void p9_free_req(struct p9_client *c, struct p9_req_t *r) 357 { 358 int tag = r->tc->tag; 359 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); 360 361 r->status = REQ_STATUS_IDLE; 362 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) 363 p9_idpool_put(tag, c->tagpool); 364 } 365 366 /** 367 * p9_client_cb - call back from transport to client 368 * c: client state 369 * req: request received 370 * 371 */ 372 void p9_client_cb(struct p9_client *c, struct p9_req_t *req) 373 { 374 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); 375 wake_up(req->wq); 376 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); 377 } 378 EXPORT_SYMBOL(p9_client_cb); 379 380 /** 381 * p9_parse_header - parse header arguments out of a packet 382 * @pdu: packet to parse 383 * @size: size of packet 384 * @type: type of request 385 * @tag: tag of packet 386 * @rewind: set if we need to rewind offset afterwards 387 */ 388 389 int 390 p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, 391 int rewind) 392 { 393 int8_t r_type; 394 int16_t r_tag; 395 int32_t r_size; 396 int offset = pdu->offset; 397 int err; 398 399 pdu->offset = 0; 400 if (pdu->size == 0) 401 pdu->size = 7; 402 403 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); 404 if (err) 405 goto rewind_and_exit; 406 407 pdu->size = r_size; 408 pdu->id = r_type; 409 pdu->tag = r_tag; 410 411 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, 412 pdu->id, pdu->tag); 413 414 if (type) 415 *type = r_type; 416 if (tag) 417 *tag = r_tag; 418 if (size) 419 *size = r_size; 420 421 422 rewind_and_exit: 423 if (rewind) 424 pdu->offset = offset; 425 return err; 426 } 427 EXPORT_SYMBOL(p9_parse_header); 428 429 /** 430 * p9_check_errors - check 9p packet for error return and process it 431 * @c: current client instance 432 * @req: request to parse and check for error conditions 433 * 434 * returns error code if one is discovered, otherwise returns 0 435 * 436 * this will have to be more complicated if we have multiple 437 * error packet types 438 */ 439 440 static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) 441 { 442 int8_t type; 443 int err; 444 445 err = p9_parse_header(req->rc, NULL, &type, NULL, 0); 446 if (err) { 447 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); 448 return err; 449 } 450 451 if (type == P9_RERROR) { 452 int ecode; 453 char *ename; 454 455 err = p9pdu_readf(req->rc, c->proto_version, "s?d", 456 &ename, &ecode); 457 if (err) { 458 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", 459 err); 460 return err; 461 } 462 463 if (p9_is_proto_dotu(c) || 464 p9_is_proto_dotl(c)) 465 err = -ecode; 466 467 if (!err || !IS_ERR_VALUE(err)) 468 err = p9_errstr2errno(ename, strlen(ename)); 469 470 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); 471 472 kfree(ename); 473 } else 474 err = 0; 475 476 return err; 477 } 478 479 /** 480 * p9_client_flush - flush (cancel) a request 481 * @c: client state 482 * @oldreq: request to cancel 483 * 484 * This sents a flush for a particular requests and links 485 * the flush request to the original request. The current 486 * code only supports a single flush request although the protocol 487 * allows for multiple flush requests to be sent for a single request. 488 * 489 */ 490 491 static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) 492 { 493 struct p9_req_t *req; 494 int16_t oldtag; 495 int err; 496 497 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); 498 if (err) 499 return err; 500 501 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); 502 503 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); 504 if (IS_ERR(req)) 505 return PTR_ERR(req); 506 507 508 /* if we haven't received a response for oldreq, 509 remove it from the list. */ 510 spin_lock(&c->lock); 511 if (oldreq->status == REQ_STATUS_FLSH) 512 list_del(&oldreq->req_list); 513 spin_unlock(&c->lock); 514 515 p9_free_req(c, req); 516 return 0; 517 } 518 519 /** 520 * p9_client_rpc - issue a request and wait for a response 521 * @c: client session 522 * @type: type of request 523 * @fmt: protocol format string (see protocol.c) 524 * 525 * Returns request structure (which client must free using p9_free_req) 526 */ 527 528 static struct p9_req_t * 529 p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) 530 { 531 va_list ap; 532 int tag, err; 533 struct p9_req_t *req; 534 unsigned long flags; 535 int sigpending; 536 537 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); 538 539 /* we allow for any status other than disconnected */ 540 if (c->status == Disconnected) 541 return ERR_PTR(-EIO); 542 543 /* if status is begin_disconnected we allow only clunk request */ 544 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) 545 return ERR_PTR(-EIO); 546 547 if (signal_pending(current)) { 548 sigpending = 1; 549 clear_thread_flag(TIF_SIGPENDING); 550 } else 551 sigpending = 0; 552 553 tag = P9_NOTAG; 554 if (type != P9_TVERSION) { 555 tag = p9_idpool_get(c->tagpool); 556 if (tag < 0) 557 return ERR_PTR(-ENOMEM); 558 } 559 560 req = p9_tag_alloc(c, tag); 561 if (IS_ERR(req)) 562 return req; 563 564 /* marshall the data */ 565 p9pdu_prepare(req->tc, tag, type); 566 va_start(ap, fmt); 567 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); 568 va_end(ap); 569 p9pdu_finalize(req->tc); 570 571 err = c->trans_mod->request(c, req); 572 if (err < 0) { 573 c->status = Disconnected; 574 goto reterr; 575 } 576 577 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); 578 err = wait_event_interruptible(*req->wq, 579 req->status >= REQ_STATUS_RCVD); 580 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", 581 req->wq, tag, err); 582 583 if (req->status == REQ_STATUS_ERROR) { 584 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); 585 err = req->t_err; 586 } 587 588 if ((err == -ERESTARTSYS) && (c->status == Connected)) { 589 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); 590 sigpending = 1; 591 clear_thread_flag(TIF_SIGPENDING); 592 593 if (c->trans_mod->cancel(c, req)) 594 p9_client_flush(c, req); 595 596 /* if we received the response anyway, don't signal error */ 597 if (req->status == REQ_STATUS_RCVD) 598 err = 0; 599 } 600 601 if (sigpending) { 602 spin_lock_irqsave(¤t->sighand->siglock, flags); 603 recalc_sigpending(); 604 spin_unlock_irqrestore(¤t->sighand->siglock, flags); 605 } 606 607 if (err < 0) 608 goto reterr; 609 610 err = p9_check_errors(c, req); 611 if (!err) { 612 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); 613 return req; 614 } 615 616 reterr: 617 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, 618 err); 619 p9_free_req(c, req); 620 return ERR_PTR(err); 621 } 622 623 static struct p9_fid *p9_fid_create(struct p9_client *clnt) 624 { 625 int ret; 626 struct p9_fid *fid; 627 unsigned long flags; 628 629 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); 630 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); 631 if (!fid) 632 return ERR_PTR(-ENOMEM); 633 634 ret = p9_idpool_get(clnt->fidpool); 635 if (ret < 0) { 636 ret = -ENOSPC; 637 goto error; 638 } 639 fid->fid = ret; 640 641 memset(&fid->qid, 0, sizeof(struct p9_qid)); 642 fid->mode = -1; 643 fid->uid = current_fsuid(); 644 fid->clnt = clnt; 645 fid->rdir = NULL; 646 spin_lock_irqsave(&clnt->lock, flags); 647 list_add(&fid->flist, &clnt->fidlist); 648 spin_unlock_irqrestore(&clnt->lock, flags); 649 650 return fid; 651 652 error: 653 kfree(fid); 654 return ERR_PTR(ret); 655 } 656 657 static void p9_fid_destroy(struct p9_fid *fid) 658 { 659 struct p9_client *clnt; 660 unsigned long flags; 661 662 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); 663 clnt = fid->clnt; 664 p9_idpool_put(fid->fid, clnt->fidpool); 665 spin_lock_irqsave(&clnt->lock, flags); 666 list_del(&fid->flist); 667 spin_unlock_irqrestore(&clnt->lock, flags); 668 kfree(fid->rdir); 669 kfree(fid); 670 } 671 672 int p9_client_version(struct p9_client *c) 673 { 674 int err = 0; 675 struct p9_req_t *req; 676 char *version; 677 int msize; 678 679 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", 680 c->msize, c->proto_version); 681 682 switch (c->proto_version) { 683 case p9_proto_2000L: 684 req = p9_client_rpc(c, P9_TVERSION, "ds", 685 c->msize, "9P2000.L"); 686 break; 687 case p9_proto_2000u: 688 req = p9_client_rpc(c, P9_TVERSION, "ds", 689 c->msize, "9P2000.u"); 690 break; 691 case p9_proto_legacy: 692 req = p9_client_rpc(c, P9_TVERSION, "ds", 693 c->msize, "9P2000"); 694 break; 695 default: 696 return -EINVAL; 697 break; 698 } 699 700 if (IS_ERR(req)) 701 return PTR_ERR(req); 702 703 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); 704 if (err) { 705 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); 706 p9pdu_dump(1, req->rc); 707 goto error; 708 } 709 710 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); 711 if (!strncmp(version, "9P2000.L", 8)) 712 c->proto_version = p9_proto_2000L; 713 else if (!strncmp(version, "9P2000.u", 8)) 714 c->proto_version = p9_proto_2000u; 715 else if (!strncmp(version, "9P2000", 6)) 716 c->proto_version = p9_proto_legacy; 717 else { 718 err = -EREMOTEIO; 719 goto error; 720 } 721 722 if (msize < c->msize) 723 c->msize = msize; 724 725 error: 726 kfree(version); 727 p9_free_req(c, req); 728 729 return err; 730 } 731 EXPORT_SYMBOL(p9_client_version); 732 733 struct p9_client *p9_client_create(const char *dev_name, char *options) 734 { 735 int err; 736 struct p9_client *clnt; 737 738 err = 0; 739 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); 740 if (!clnt) 741 return ERR_PTR(-ENOMEM); 742 743 clnt->trans_mod = NULL; 744 clnt->trans = NULL; 745 spin_lock_init(&clnt->lock); 746 INIT_LIST_HEAD(&clnt->fidlist); 747 748 p9_tag_init(clnt); 749 750 err = parse_opts(options, clnt); 751 if (err < 0) 752 goto free_client; 753 754 if (!clnt->trans_mod) 755 clnt->trans_mod = v9fs_get_default_trans(); 756 757 if (clnt->trans_mod == NULL) { 758 err = -EPROTONOSUPPORT; 759 P9_DPRINTK(P9_DEBUG_ERROR, 760 "No transport defined or default transport\n"); 761 goto free_client; 762 } 763 764 clnt->fidpool = p9_idpool_create(); 765 if (IS_ERR(clnt->fidpool)) { 766 err = PTR_ERR(clnt->fidpool); 767 clnt->fidpool = NULL; 768 goto put_trans; 769 } 770 771 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", 772 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); 773 774 err = clnt->trans_mod->create(clnt, dev_name, options); 775 if (err) 776 goto destroy_fidpool; 777 778 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) 779 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; 780 781 err = p9_client_version(clnt); 782 if (err) 783 goto close_trans; 784 785 return clnt; 786 787 close_trans: 788 clnt->trans_mod->close(clnt); 789 destroy_fidpool: 790 p9_idpool_destroy(clnt->fidpool); 791 put_trans: 792 v9fs_put_trans(clnt->trans_mod); 793 free_client: 794 kfree(clnt); 795 return ERR_PTR(err); 796 } 797 EXPORT_SYMBOL(p9_client_create); 798 799 void p9_client_destroy(struct p9_client *clnt) 800 { 801 struct p9_fid *fid, *fidptr; 802 803 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); 804 805 if (clnt->trans_mod) 806 clnt->trans_mod->close(clnt); 807 808 v9fs_put_trans(clnt->trans_mod); 809 810 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { 811 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); 812 p9_fid_destroy(fid); 813 } 814 815 if (clnt->fidpool) 816 p9_idpool_destroy(clnt->fidpool); 817 818 p9_tag_cleanup(clnt); 819 820 kfree(clnt); 821 } 822 EXPORT_SYMBOL(p9_client_destroy); 823 824 void p9_client_disconnect(struct p9_client *clnt) 825 { 826 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 827 clnt->status = Disconnected; 828 } 829 EXPORT_SYMBOL(p9_client_disconnect); 830 831 void p9_client_begin_disconnect(struct p9_client *clnt) 832 { 833 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 834 clnt->status = BeginDisconnect; 835 } 836 EXPORT_SYMBOL(p9_client_begin_disconnect); 837 838 struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, 839 char *uname, u32 n_uname, char *aname) 840 { 841 int err; 842 struct p9_req_t *req; 843 struct p9_fid *fid; 844 struct p9_qid qid; 845 846 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", 847 afid ? afid->fid : -1, uname, aname); 848 err = 0; 849 850 fid = p9_fid_create(clnt); 851 if (IS_ERR(fid)) { 852 err = PTR_ERR(fid); 853 fid = NULL; 854 goto error; 855 } 856 857 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, 858 afid ? afid->fid : P9_NOFID, uname, aname, n_uname); 859 if (IS_ERR(req)) { 860 err = PTR_ERR(req); 861 goto error; 862 } 863 864 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); 865 if (err) { 866 p9pdu_dump(1, req->rc); 867 p9_free_req(clnt, req); 868 goto error; 869 } 870 871 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", 872 qid.type, 873 (unsigned long long)qid.path, 874 qid.version); 875 876 memmove(&fid->qid, &qid, sizeof(struct p9_qid)); 877 878 p9_free_req(clnt, req); 879 return fid; 880 881 error: 882 if (fid) 883 p9_fid_destroy(fid); 884 return ERR_PTR(err); 885 } 886 EXPORT_SYMBOL(p9_client_attach); 887 888 struct p9_fid * 889 p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) 890 { 891 int err; 892 struct p9_req_t *req; 893 struct p9_qid qid; 894 struct p9_fid *afid; 895 896 P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); 897 err = 0; 898 899 afid = p9_fid_create(clnt); 900 if (IS_ERR(afid)) { 901 err = PTR_ERR(afid); 902 afid = NULL; 903 goto error; 904 } 905 906 req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", 907 afid ? afid->fid : P9_NOFID, uname, aname, n_uname); 908 if (IS_ERR(req)) { 909 err = PTR_ERR(req); 910 goto error; 911 } 912 913 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); 914 if (err) { 915 p9pdu_dump(1, req->rc); 916 p9_free_req(clnt, req); 917 goto error; 918 } 919 920 P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", 921 qid.type, 922 (unsigned long long)qid.path, 923 qid.version); 924 925 memmove(&afid->qid, &qid, sizeof(struct p9_qid)); 926 p9_free_req(clnt, req); 927 return afid; 928 929 error: 930 if (afid) 931 p9_fid_destroy(afid); 932 return ERR_PTR(err); 933 } 934 EXPORT_SYMBOL(p9_client_auth); 935 936 struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, 937 int clone) 938 { 939 int err; 940 struct p9_client *clnt; 941 struct p9_fid *fid; 942 struct p9_qid *wqids; 943 struct p9_req_t *req; 944 int16_t nwqids, count; 945 946 err = 0; 947 clnt = oldfid->clnt; 948 if (clone) { 949 fid = p9_fid_create(clnt); 950 if (IS_ERR(fid)) { 951 err = PTR_ERR(fid); 952 fid = NULL; 953 goto error; 954 } 955 956 fid->uid = oldfid->uid; 957 } else 958 fid = oldfid; 959 960 961 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", 962 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); 963 964 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, 965 nwname, wnames); 966 if (IS_ERR(req)) { 967 err = PTR_ERR(req); 968 goto error; 969 } 970 971 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); 972 if (err) { 973 p9pdu_dump(1, req->rc); 974 p9_free_req(clnt, req); 975 goto clunk_fid; 976 } 977 p9_free_req(clnt, req); 978 979 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); 980 981 if (nwqids != nwname) { 982 err = -ENOENT; 983 goto clunk_fid; 984 } 985 986 for (count = 0; count < nwqids; count++) 987 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", 988 count, wqids[count].type, 989 (unsigned long long)wqids[count].path, 990 wqids[count].version); 991 992 if (nwname) 993 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); 994 else 995 fid->qid = oldfid->qid; 996 997 return fid; 998 999 clunk_fid: 1000 p9_client_clunk(fid); 1001 fid = NULL; 1002 1003 error: 1004 if (fid && (fid != oldfid)) 1005 p9_fid_destroy(fid); 1006 1007 return ERR_PTR(err); 1008 } 1009 EXPORT_SYMBOL(p9_client_walk); 1010 1011 int p9_client_open(struct p9_fid *fid, int mode) 1012 { 1013 int err; 1014 struct p9_client *clnt; 1015 struct p9_req_t *req; 1016 struct p9_qid qid; 1017 int iounit; 1018 1019 clnt = fid->clnt; 1020 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", 1021 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); 1022 err = 0; 1023 1024 if (fid->mode != -1) 1025 return -EINVAL; 1026 1027 if (p9_is_proto_dotl(clnt)) 1028 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); 1029 else 1030 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); 1031 if (IS_ERR(req)) { 1032 err = PTR_ERR(req); 1033 goto error; 1034 } 1035 1036 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1037 if (err) { 1038 p9pdu_dump(1, req->rc); 1039 goto free_and_error; 1040 } 1041 1042 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", 1043 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, 1044 (unsigned long long)qid.path, qid.version, iounit); 1045 1046 fid->mode = mode; 1047 fid->iounit = iounit; 1048 1049 free_and_error: 1050 p9_free_req(clnt, req); 1051 error: 1052 return err; 1053 } 1054 EXPORT_SYMBOL(p9_client_open); 1055 1056 int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, 1057 gid_t gid, struct p9_qid *qid) 1058 { 1059 int err = 0; 1060 struct p9_client *clnt; 1061 struct p9_req_t *req; 1062 int iounit; 1063 1064 P9_DPRINTK(P9_DEBUG_9P, 1065 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", 1066 ofid->fid, name, flags, mode, gid); 1067 clnt = ofid->clnt; 1068 1069 if (ofid->mode != -1) 1070 return -EINVAL; 1071 1072 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, 1073 mode, gid); 1074 if (IS_ERR(req)) { 1075 err = PTR_ERR(req); 1076 goto error; 1077 } 1078 1079 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); 1080 if (err) { 1081 p9pdu_dump(1, req->rc); 1082 goto free_and_error; 1083 } 1084 1085 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", 1086 qid->type, 1087 (unsigned long long)qid->path, 1088 qid->version, iounit); 1089 1090 ofid->mode = mode; 1091 ofid->iounit = iounit; 1092 1093 free_and_error: 1094 p9_free_req(clnt, req); 1095 error: 1096 return err; 1097 } 1098 EXPORT_SYMBOL(p9_client_create_dotl); 1099 1100 int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, 1101 char *extension) 1102 { 1103 int err; 1104 struct p9_client *clnt; 1105 struct p9_req_t *req; 1106 struct p9_qid qid; 1107 int iounit; 1108 1109 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", 1110 fid->fid, name, perm, mode); 1111 err = 0; 1112 clnt = fid->clnt; 1113 1114 if (fid->mode != -1) 1115 return -EINVAL; 1116 1117 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, 1118 mode, extension); 1119 if (IS_ERR(req)) { 1120 err = PTR_ERR(req); 1121 goto error; 1122 } 1123 1124 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1125 if (err) { 1126 p9pdu_dump(1, req->rc); 1127 goto free_and_error; 1128 } 1129 1130 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", 1131 qid.type, 1132 (unsigned long long)qid.path, 1133 qid.version, iounit); 1134 1135 fid->mode = mode; 1136 fid->iounit = iounit; 1137 1138 free_and_error: 1139 p9_free_req(clnt, req); 1140 error: 1141 return err; 1142 } 1143 EXPORT_SYMBOL(p9_client_fcreate); 1144 1145 int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, 1146 struct p9_qid *qid) 1147 { 1148 int err = 0; 1149 struct p9_client *clnt; 1150 struct p9_req_t *req; 1151 1152 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", 1153 dfid->fid, name, symtgt); 1154 clnt = dfid->clnt; 1155 1156 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, 1157 gid); 1158 if (IS_ERR(req)) { 1159 err = PTR_ERR(req); 1160 goto error; 1161 } 1162 1163 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1164 if (err) { 1165 p9pdu_dump(1, req->rc); 1166 goto free_and_error; 1167 } 1168 1169 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", 1170 qid->type, (unsigned long long)qid->path, qid->version); 1171 1172 free_and_error: 1173 p9_free_req(clnt, req); 1174 error: 1175 return err; 1176 } 1177 EXPORT_SYMBOL(p9_client_symlink); 1178 1179 int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) 1180 { 1181 struct p9_client *clnt; 1182 struct p9_req_t *req; 1183 1184 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", 1185 dfid->fid, oldfid->fid, newname); 1186 clnt = dfid->clnt; 1187 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, 1188 newname); 1189 if (IS_ERR(req)) 1190 return PTR_ERR(req); 1191 1192 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); 1193 p9_free_req(clnt, req); 1194 return 0; 1195 } 1196 EXPORT_SYMBOL(p9_client_link); 1197 1198 int p9_client_clunk(struct p9_fid *fid) 1199 { 1200 int err; 1201 struct p9_client *clnt; 1202 struct p9_req_t *req; 1203 1204 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); 1205 err = 0; 1206 clnt = fid->clnt; 1207 1208 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); 1209 if (IS_ERR(req)) { 1210 err = PTR_ERR(req); 1211 goto error; 1212 } 1213 1214 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); 1215 1216 p9_free_req(clnt, req); 1217 p9_fid_destroy(fid); 1218 1219 error: 1220 return err; 1221 } 1222 EXPORT_SYMBOL(p9_client_clunk); 1223 1224 int p9_client_remove(struct p9_fid *fid) 1225 { 1226 int err; 1227 struct p9_client *clnt; 1228 struct p9_req_t *req; 1229 1230 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); 1231 err = 0; 1232 clnt = fid->clnt; 1233 1234 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); 1235 if (IS_ERR(req)) { 1236 err = PTR_ERR(req); 1237 goto error; 1238 } 1239 1240 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); 1241 1242 p9_free_req(clnt, req); 1243 error: 1244 p9_fid_destroy(fid); 1245 return err; 1246 } 1247 EXPORT_SYMBOL(p9_client_remove); 1248 1249 int 1250 p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, 1251 u32 count) 1252 { 1253 int err, rsize, total; 1254 struct p9_client *clnt; 1255 struct p9_req_t *req; 1256 char *dataptr; 1257 1258 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, 1259 (long long unsigned) offset, count); 1260 err = 0; 1261 clnt = fid->clnt; 1262 total = 0; 1263 1264 rsize = fid->iounit; 1265 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1266 rsize = clnt->msize - P9_IOHDRSZ; 1267 1268 if (count < rsize) 1269 rsize = count; 1270 1271 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); 1272 if (IS_ERR(req)) { 1273 err = PTR_ERR(req); 1274 goto error; 1275 } 1276 1277 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1278 if (err) { 1279 p9pdu_dump(1, req->rc); 1280 goto free_and_error; 1281 } 1282 1283 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); 1284 1285 if (data) { 1286 memmove(data, dataptr, count); 1287 } 1288 1289 if (udata) { 1290 err = copy_to_user(udata, dataptr, count); 1291 if (err) { 1292 err = -EFAULT; 1293 goto free_and_error; 1294 } 1295 } 1296 1297 p9_free_req(clnt, req); 1298 return count; 1299 1300 free_and_error: 1301 p9_free_req(clnt, req); 1302 error: 1303 return err; 1304 } 1305 EXPORT_SYMBOL(p9_client_read); 1306 1307 int 1308 p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, 1309 u64 offset, u32 count) 1310 { 1311 int err, rsize, total; 1312 struct p9_client *clnt; 1313 struct p9_req_t *req; 1314 1315 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", 1316 fid->fid, (long long unsigned) offset, count); 1317 err = 0; 1318 clnt = fid->clnt; 1319 total = 0; 1320 1321 rsize = fid->iounit; 1322 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1323 rsize = clnt->msize - P9_IOHDRSZ; 1324 1325 if (count < rsize) 1326 rsize = count; 1327 if (data) 1328 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, 1329 rsize, data); 1330 else 1331 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, 1332 rsize, udata); 1333 if (IS_ERR(req)) { 1334 err = PTR_ERR(req); 1335 goto error; 1336 } 1337 1338 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); 1339 if (err) { 1340 p9pdu_dump(1, req->rc); 1341 goto free_and_error; 1342 } 1343 1344 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); 1345 1346 p9_free_req(clnt, req); 1347 return count; 1348 1349 free_and_error: 1350 p9_free_req(clnt, req); 1351 error: 1352 return err; 1353 } 1354 EXPORT_SYMBOL(p9_client_write); 1355 1356 struct p9_wstat *p9_client_stat(struct p9_fid *fid) 1357 { 1358 int err; 1359 struct p9_client *clnt; 1360 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); 1361 struct p9_req_t *req; 1362 u16 ignored; 1363 1364 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); 1365 1366 if (!ret) 1367 return ERR_PTR(-ENOMEM); 1368 1369 err = 0; 1370 clnt = fid->clnt; 1371 1372 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); 1373 if (IS_ERR(req)) { 1374 err = PTR_ERR(req); 1375 goto error; 1376 } 1377 1378 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); 1379 if (err) { 1380 p9pdu_dump(1, req->rc); 1381 p9_free_req(clnt, req); 1382 goto error; 1383 } 1384 1385 P9_DPRINTK(P9_DEBUG_9P, 1386 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1387 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1388 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1389 "<<< uid=%d gid=%d n_muid=%d\n", 1390 ret->size, ret->type, ret->dev, ret->qid.type, 1391 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, 1392 ret->atime, ret->mtime, (unsigned long long)ret->length, 1393 ret->name, ret->uid, ret->gid, ret->muid, ret->extension, 1394 ret->n_uid, ret->n_gid, ret->n_muid); 1395 1396 p9_free_req(clnt, req); 1397 return ret; 1398 1399 error: 1400 kfree(ret); 1401 return ERR_PTR(err); 1402 } 1403 EXPORT_SYMBOL(p9_client_stat); 1404 1405 struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, 1406 u64 request_mask) 1407 { 1408 int err; 1409 struct p9_client *clnt; 1410 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), 1411 GFP_KERNEL); 1412 struct p9_req_t *req; 1413 1414 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", 1415 fid->fid, request_mask); 1416 1417 if (!ret) 1418 return ERR_PTR(-ENOMEM); 1419 1420 err = 0; 1421 clnt = fid->clnt; 1422 1423 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); 1424 if (IS_ERR(req)) { 1425 err = PTR_ERR(req); 1426 goto error; 1427 } 1428 1429 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); 1430 if (err) { 1431 p9pdu_dump(1, req->rc); 1432 p9_free_req(clnt, req); 1433 goto error; 1434 } 1435 1436 P9_DPRINTK(P9_DEBUG_9P, 1437 "<<< RGETATTR st_result_mask=%lld\n" 1438 "<<< qid=%x.%llx.%x\n" 1439 "<<< st_mode=%8.8x st_nlink=%llu\n" 1440 "<<< st_uid=%d st_gid=%d\n" 1441 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" 1442 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" 1443 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" 1444 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" 1445 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" 1446 "<<< st_gen=%lld st_data_version=%lld", 1447 ret->st_result_mask, ret->qid.type, ret->qid.path, 1448 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, 1449 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, 1450 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, 1451 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, 1452 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, 1453 ret->st_gen, ret->st_data_version); 1454 1455 p9_free_req(clnt, req); 1456 return ret; 1457 1458 error: 1459 kfree(ret); 1460 return ERR_PTR(err); 1461 } 1462 EXPORT_SYMBOL(p9_client_getattr_dotl); 1463 1464 static int p9_client_statsize(struct p9_wstat *wst, int proto_version) 1465 { 1466 int ret; 1467 1468 /* NOTE: size shouldn't include its own length */ 1469 /* size[2] type[2] dev[4] qid[13] */ 1470 /* mode[4] atime[4] mtime[4] length[8]*/ 1471 /* name[s] uid[s] gid[s] muid[s] */ 1472 ret = 2+4+13+4+4+4+8+2+2+2+2; 1473 1474 if (wst->name) 1475 ret += strlen(wst->name); 1476 if (wst->uid) 1477 ret += strlen(wst->uid); 1478 if (wst->gid) 1479 ret += strlen(wst->gid); 1480 if (wst->muid) 1481 ret += strlen(wst->muid); 1482 1483 if ((proto_version == p9_proto_2000u) || 1484 (proto_version == p9_proto_2000L)) { 1485 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ 1486 if (wst->extension) 1487 ret += strlen(wst->extension); 1488 } 1489 1490 return ret; 1491 } 1492 1493 int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) 1494 { 1495 int err; 1496 struct p9_req_t *req; 1497 struct p9_client *clnt; 1498 1499 err = 0; 1500 clnt = fid->clnt; 1501 wst->size = p9_client_statsize(wst, clnt->proto_version); 1502 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); 1503 P9_DPRINTK(P9_DEBUG_9P, 1504 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1505 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1506 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1507 " uid=%d gid=%d n_muid=%d\n", 1508 wst->size, wst->type, wst->dev, wst->qid.type, 1509 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, 1510 wst->atime, wst->mtime, (unsigned long long)wst->length, 1511 wst->name, wst->uid, wst->gid, wst->muid, wst->extension, 1512 wst->n_uid, wst->n_gid, wst->n_muid); 1513 1514 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); 1515 if (IS_ERR(req)) { 1516 err = PTR_ERR(req); 1517 goto error; 1518 } 1519 1520 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); 1521 1522 p9_free_req(clnt, req); 1523 error: 1524 return err; 1525 } 1526 EXPORT_SYMBOL(p9_client_wstat); 1527 1528 int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) 1529 { 1530 int err; 1531 struct p9_req_t *req; 1532 struct p9_client *clnt; 1533 1534 err = 0; 1535 clnt = fid->clnt; 1536 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); 1537 P9_DPRINTK(P9_DEBUG_9P, 1538 " valid=%x mode=%x uid=%d gid=%d size=%lld\n" 1539 " atime_sec=%lld atime_nsec=%lld\n" 1540 " mtime_sec=%lld mtime_nsec=%lld\n", 1541 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, 1542 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, 1543 p9attr->mtime_sec, p9attr->mtime_nsec); 1544 1545 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); 1546 1547 if (IS_ERR(req)) { 1548 err = PTR_ERR(req); 1549 goto error; 1550 } 1551 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); 1552 p9_free_req(clnt, req); 1553 error: 1554 return err; 1555 } 1556 EXPORT_SYMBOL(p9_client_setattr); 1557 1558 int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) 1559 { 1560 int err; 1561 struct p9_req_t *req; 1562 struct p9_client *clnt; 1563 1564 err = 0; 1565 clnt = fid->clnt; 1566 1567 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); 1568 1569 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); 1570 if (IS_ERR(req)) { 1571 err = PTR_ERR(req); 1572 goto error; 1573 } 1574 1575 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, 1576 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, 1577 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); 1578 if (err) { 1579 p9pdu_dump(1, req->rc); 1580 p9_free_req(clnt, req); 1581 goto error; 1582 } 1583 1584 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " 1585 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " 1586 "fsid %llu namelen %ld\n", 1587 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, 1588 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, 1589 sb->fsid, (long int)sb->namelen); 1590 1591 p9_free_req(clnt, req); 1592 error: 1593 return err; 1594 } 1595 EXPORT_SYMBOL(p9_client_statfs); 1596 1597 int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) 1598 { 1599 int err; 1600 struct p9_req_t *req; 1601 struct p9_client *clnt; 1602 1603 err = 0; 1604 clnt = fid->clnt; 1605 1606 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", 1607 fid->fid, newdirfid->fid, name); 1608 1609 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, 1610 newdirfid->fid, name); 1611 if (IS_ERR(req)) { 1612 err = PTR_ERR(req); 1613 goto error; 1614 } 1615 1616 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); 1617 1618 p9_free_req(clnt, req); 1619 error: 1620 return err; 1621 } 1622 EXPORT_SYMBOL(p9_client_rename); 1623 1624 /* 1625 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace 1626 */ 1627 struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, 1628 const char *attr_name, u64 *attr_size) 1629 { 1630 int err; 1631 struct p9_req_t *req; 1632 struct p9_client *clnt; 1633 struct p9_fid *attr_fid; 1634 1635 err = 0; 1636 clnt = file_fid->clnt; 1637 attr_fid = p9_fid_create(clnt); 1638 if (IS_ERR(attr_fid)) { 1639 err = PTR_ERR(attr_fid); 1640 attr_fid = NULL; 1641 goto error; 1642 } 1643 P9_DPRINTK(P9_DEBUG_9P, 1644 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", 1645 file_fid->fid, attr_fid->fid, attr_name); 1646 1647 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", 1648 file_fid->fid, attr_fid->fid, attr_name); 1649 if (IS_ERR(req)) { 1650 err = PTR_ERR(req); 1651 goto error; 1652 } 1653 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); 1654 if (err) { 1655 p9pdu_dump(1, req->rc); 1656 p9_free_req(clnt, req); 1657 goto clunk_fid; 1658 } 1659 p9_free_req(clnt, req); 1660 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", 1661 attr_fid->fid, *attr_size); 1662 return attr_fid; 1663 clunk_fid: 1664 p9_client_clunk(attr_fid); 1665 attr_fid = NULL; 1666 error: 1667 if (attr_fid && (attr_fid != file_fid)) 1668 p9_fid_destroy(attr_fid); 1669 1670 return ERR_PTR(err); 1671 } 1672 EXPORT_SYMBOL_GPL(p9_client_xattrwalk); 1673 1674 int p9_client_xattrcreate(struct p9_fid *fid, const char *name, 1675 u64 attr_size, int flags) 1676 { 1677 int err; 1678 struct p9_req_t *req; 1679 struct p9_client *clnt; 1680 1681 P9_DPRINTK(P9_DEBUG_9P, 1682 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", 1683 fid->fid, name, (long long)attr_size, flags); 1684 err = 0; 1685 clnt = fid->clnt; 1686 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", 1687 fid->fid, name, attr_size, flags); 1688 if (IS_ERR(req)) { 1689 err = PTR_ERR(req); 1690 goto error; 1691 } 1692 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); 1693 p9_free_req(clnt, req); 1694 error: 1695 return err; 1696 } 1697 EXPORT_SYMBOL_GPL(p9_client_xattrcreate); 1698 1699 int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) 1700 { 1701 int err, rsize, total; 1702 struct p9_client *clnt; 1703 struct p9_req_t *req; 1704 char *dataptr; 1705 1706 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", 1707 fid->fid, (long long unsigned) offset, count); 1708 1709 err = 0; 1710 clnt = fid->clnt; 1711 total = 0; 1712 1713 rsize = fid->iounit; 1714 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) 1715 rsize = clnt->msize - P9_READDIRHDRSZ; 1716 1717 if (count < rsize) 1718 rsize = count; 1719 1720 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); 1721 if (IS_ERR(req)) { 1722 err = PTR_ERR(req); 1723 goto error; 1724 } 1725 1726 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1727 if (err) { 1728 p9pdu_dump(1, req->rc); 1729 goto free_and_error; 1730 } 1731 1732 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); 1733 1734 if (data) 1735 memmove(data, dataptr, count); 1736 1737 p9_free_req(clnt, req); 1738 return count; 1739 1740 free_and_error: 1741 p9_free_req(clnt, req); 1742 error: 1743 return err; 1744 } 1745 EXPORT_SYMBOL(p9_client_readdir); 1746 1747 int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, 1748 dev_t rdev, gid_t gid, struct p9_qid *qid) 1749 { 1750 int err; 1751 struct p9_client *clnt; 1752 struct p9_req_t *req; 1753 1754 err = 0; 1755 clnt = fid->clnt; 1756 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " 1757 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); 1758 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, 1759 MAJOR(rdev), MINOR(rdev), gid); 1760 if (IS_ERR(req)) 1761 return PTR_ERR(req); 1762 1763 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1764 if (err) { 1765 p9pdu_dump(1, req->rc); 1766 goto error; 1767 } 1768 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, 1769 (unsigned long long)qid->path, qid->version); 1770 1771 error: 1772 p9_free_req(clnt, req); 1773 return err; 1774 1775 } 1776 EXPORT_SYMBOL(p9_client_mknod_dotl); 1777 1778 int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, 1779 gid_t gid, struct p9_qid *qid) 1780 { 1781 int err; 1782 struct p9_client *clnt; 1783 struct p9_req_t *req; 1784 1785 err = 0; 1786 clnt = fid->clnt; 1787 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", 1788 fid->fid, name, mode, gid); 1789 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, 1790 gid); 1791 if (IS_ERR(req)) 1792 return PTR_ERR(req); 1793 1794 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1795 if (err) { 1796 p9pdu_dump(1, req->rc); 1797 goto error; 1798 } 1799 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, 1800 (unsigned long long)qid->path, qid->version); 1801 1802 error: 1803 p9_free_req(clnt, req); 1804 return err; 1805 1806 } 1807 EXPORT_SYMBOL(p9_client_mkdir_dotl); 1808