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 46enum { 47 Opt_msize, 48 Opt_trans, 49 Opt_legacy, 50 Opt_version, 51 Opt_err, 52}; 53 54static 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 62inline int p9_is_proto_dotl(struct p9_client *clnt) 63{ 64 return (clnt->proto_version == p9_proto_2000L); 65} 66EXPORT_SYMBOL(p9_is_proto_dotl); 67 68inline int p9_is_proto_dotu(struct p9_client *clnt) 69{ 70 return (clnt->proto_version == p9_proto_2000u); 71} 72EXPORT_SYMBOL(p9_is_proto_dotu); 73 74/* Interpret mount option for protocol version */ 75static 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 95static struct p9_req_t * 96p9_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 106static 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 170free_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 190static 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 267struct 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} 282EXPORT_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 292static 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; 306error: 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 */ 317static 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_put(0, c->tagpool); /* free reserved tag 0 */ 336 p9_idpool_destroy(c->tagpool); 337 } 338 339 /* free requests associated with tags */ 340 for (row = 0; row < (c->max_tag/P9_ROW_MAXTAG); row++) { 341 for (col = 0; col < P9_ROW_MAXTAG; col++) { 342 kfree(c->reqs[row][col].wq); 343 kfree(c->reqs[row][col].tc); 344 kfree(c->reqs[row][col].rc); 345 } 346 kfree(c->reqs[row]); 347 } 348 c->max_tag = 0; 349} 350 351/** 352 * p9_free_req - free a request and clean-up as necessary 353 * c: client state 354 * r: request to release 355 * 356 */ 357 358static void p9_free_req(struct p9_client *c, struct p9_req_t *r) 359{ 360 int tag = r->tc->tag; 361 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p req %p tag: %d\n", c, r, tag); 362 363 r->status = REQ_STATUS_IDLE; 364 if (tag != P9_NOTAG && p9_idpool_check(tag, c->tagpool)) 365 p9_idpool_put(tag, c->tagpool); 366} 367 368/** 369 * p9_client_cb - call back from transport to client 370 * c: client state 371 * req: request received 372 * 373 */ 374void p9_client_cb(struct p9_client *c, struct p9_req_t *req) 375{ 376 P9_DPRINTK(P9_DEBUG_MUX, " tag %d\n", req->tc->tag); 377 wake_up(req->wq); 378 P9_DPRINTK(P9_DEBUG_MUX, "wakeup: %d\n", req->tc->tag); 379} 380EXPORT_SYMBOL(p9_client_cb); 381 382/** 383 * p9_parse_header - parse header arguments out of a packet 384 * @pdu: packet to parse 385 * @size: size of packet 386 * @type: type of request 387 * @tag: tag of packet 388 * @rewind: set if we need to rewind offset afterwards 389 */ 390 391int 392p9_parse_header(struct p9_fcall *pdu, int32_t *size, int8_t *type, int16_t *tag, 393 int rewind) 394{ 395 int8_t r_type; 396 int16_t r_tag; 397 int32_t r_size; 398 int offset = pdu->offset; 399 int err; 400 401 pdu->offset = 0; 402 if (pdu->size == 0) 403 pdu->size = 7; 404 405 err = p9pdu_readf(pdu, 0, "dbw", &r_size, &r_type, &r_tag); 406 if (err) 407 goto rewind_and_exit; 408 409 pdu->size = r_size; 410 pdu->id = r_type; 411 pdu->tag = r_tag; 412 413 P9_DPRINTK(P9_DEBUG_9P, "<<< size=%d type: %d tag: %d\n", pdu->size, 414 pdu->id, pdu->tag); 415 416 if (type) 417 *type = r_type; 418 if (tag) 419 *tag = r_tag; 420 if (size) 421 *size = r_size; 422 423 424rewind_and_exit: 425 if (rewind) 426 pdu->offset = offset; 427 return err; 428} 429EXPORT_SYMBOL(p9_parse_header); 430 431/** 432 * p9_check_errors - check 9p packet for error return and process it 433 * @c: current client instance 434 * @req: request to parse and check for error conditions 435 * 436 * returns error code if one is discovered, otherwise returns 0 437 * 438 * this will have to be more complicated if we have multiple 439 * error packet types 440 */ 441 442static int p9_check_errors(struct p9_client *c, struct p9_req_t *req) 443{ 444 int8_t type; 445 int err; 446 447 err = p9_parse_header(req->rc, NULL, &type, NULL, 0); 448 if (err) { 449 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse header %d\n", err); 450 return err; 451 } 452 453 if (type == P9_RERROR) { 454 int ecode; 455 char *ename; 456 457 err = p9pdu_readf(req->rc, c->proto_version, "s?d", 458 &ename, &ecode); 459 if (err) { 460 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", 461 err); 462 return err; 463 } 464 465 if (p9_is_proto_dotu(c) || 466 p9_is_proto_dotl(c)) 467 err = -ecode; 468 469 if (!err || !IS_ERR_VALUE(err)) 470 err = p9_errstr2errno(ename, strlen(ename)); 471 472 P9_DPRINTK(P9_DEBUG_9P, "<<< RERROR (%d) %s\n", -ecode, ename); 473 474 kfree(ename); 475 } else 476 err = 0; 477 478 return err; 479} 480 481/** 482 * p9_client_flush - flush (cancel) a request 483 * @c: client state 484 * @oldreq: request to cancel 485 * 486 * This sents a flush for a particular requests and links 487 * the flush request to the original request. The current 488 * code only supports a single flush request although the protocol 489 * allows for multiple flush requests to be sent for a single request. 490 * 491 */ 492 493static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) 494{ 495 struct p9_req_t *req; 496 int16_t oldtag; 497 int err; 498 499 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); 500 if (err) 501 return err; 502 503 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); 504 505 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); 506 if (IS_ERR(req)) 507 return PTR_ERR(req); 508 509 510 /* if we haven't received a response for oldreq, 511 remove it from the list. */ 512 spin_lock(&c->lock); 513 if (oldreq->status == REQ_STATUS_FLSH) 514 list_del(&oldreq->req_list); 515 spin_unlock(&c->lock); 516 517 p9_free_req(c, req); 518 return 0; 519} 520 521/** 522 * p9_client_rpc - issue a request and wait for a response 523 * @c: client session 524 * @type: type of request 525 * @fmt: protocol format string (see protocol.c) 526 * 527 * Returns request structure (which client must free using p9_free_req) 528 */ 529 530static struct p9_req_t * 531p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) 532{ 533 va_list ap; 534 int tag, err; 535 struct p9_req_t *req; 536 unsigned long flags; 537 int sigpending; 538 539 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); 540 541 /* we allow for any status other than disconnected */ 542 if (c->status == Disconnected) 543 return ERR_PTR(-EIO); 544 545 /* if status is begin_disconnected we allow only clunk request */ 546 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) 547 return ERR_PTR(-EIO); 548 549 if (signal_pending(current)) { 550 sigpending = 1; 551 clear_thread_flag(TIF_SIGPENDING); 552 } else 553 sigpending = 0; 554 555 tag = P9_NOTAG; 556 if (type != P9_TVERSION) { 557 tag = p9_idpool_get(c->tagpool); 558 if (tag < 0) 559 return ERR_PTR(-ENOMEM); 560 } 561 562 req = p9_tag_alloc(c, tag); 563 if (IS_ERR(req)) 564 return req; 565 566 /* marshall the data */ 567 p9pdu_prepare(req->tc, tag, type); 568 va_start(ap, fmt); 569 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); 570 va_end(ap); 571 p9pdu_finalize(req->tc); 572 573 err = c->trans_mod->request(c, req); 574 if (err < 0) { 575 c->status = Disconnected; 576 goto reterr; 577 } 578 579 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); 580 err = wait_event_interruptible(*req->wq, 581 req->status >= REQ_STATUS_RCVD); 582 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", 583 req->wq, tag, err); 584 585 if (req->status == REQ_STATUS_ERROR) { 586 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); 587 err = req->t_err; 588 } 589 590 if ((err == -ERESTARTSYS) && (c->status == Connected)) { 591 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); 592 sigpending = 1; 593 clear_thread_flag(TIF_SIGPENDING); 594 595 if (c->trans_mod->cancel(c, req)) 596 p9_client_flush(c, req); 597 598 /* if we received the response anyway, don't signal error */ 599 if (req->status == REQ_STATUS_RCVD) 600 err = 0; 601 } 602 603 if (sigpending) { 604 spin_lock_irqsave(¤t->sighand->siglock, flags); 605 recalc_sigpending(); 606 spin_unlock_irqrestore(¤t->sighand->siglock, flags); 607 } 608 609 if (err < 0) 610 goto reterr; 611 612 err = p9_check_errors(c, req); 613 if (!err) { 614 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); 615 return req; 616 } 617 618reterr: 619 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, 620 err); 621 p9_free_req(c, req); 622 return ERR_PTR(err); 623} 624 625static struct p9_fid *p9_fid_create(struct p9_client *clnt) 626{ 627 int ret; 628 struct p9_fid *fid; 629 unsigned long flags; 630 631 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); 632 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); 633 if (!fid) 634 return ERR_PTR(-ENOMEM); 635 636 ret = p9_idpool_get(clnt->fidpool); 637 if (ret < 0) { 638 ret = -ENOSPC; 639 goto error; 640 } 641 fid->fid = ret; 642 643 memset(&fid->qid, 0, sizeof(struct p9_qid)); 644 fid->mode = -1; 645 fid->uid = current_fsuid(); 646 fid->clnt = clnt; 647 fid->rdir = NULL; 648 spin_lock_irqsave(&clnt->lock, flags); 649 list_add(&fid->flist, &clnt->fidlist); 650 spin_unlock_irqrestore(&clnt->lock, flags); 651 652 return fid; 653 654error: 655 kfree(fid); 656 return ERR_PTR(ret); 657} 658 659static void p9_fid_destroy(struct p9_fid *fid) 660{ 661 struct p9_client *clnt; 662 unsigned long flags; 663 664 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); 665 clnt = fid->clnt; 666 p9_idpool_put(fid->fid, clnt->fidpool); 667 spin_lock_irqsave(&clnt->lock, flags); 668 list_del(&fid->flist); 669 spin_unlock_irqrestore(&clnt->lock, flags); 670 kfree(fid->rdir); 671 kfree(fid); 672} 673 674int p9_client_version(struct p9_client *c) 675{ 676 int err = 0; 677 struct p9_req_t *req; 678 char *version; 679 int msize; 680 681 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", 682 c->msize, c->proto_version); 683 684 switch (c->proto_version) { 685 case p9_proto_2000L: 686 req = p9_client_rpc(c, P9_TVERSION, "ds", 687 c->msize, "9P2000.L"); 688 break; 689 case p9_proto_2000u: 690 req = p9_client_rpc(c, P9_TVERSION, "ds", 691 c->msize, "9P2000.u"); 692 break; 693 case p9_proto_legacy: 694 req = p9_client_rpc(c, P9_TVERSION, "ds", 695 c->msize, "9P2000"); 696 break; 697 default: 698 return -EINVAL; 699 break; 700 } 701 702 if (IS_ERR(req)) 703 return PTR_ERR(req); 704 705 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); 706 if (err) { 707 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); 708 p9pdu_dump(1, req->rc); 709 goto error; 710 } 711 712 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); 713 if (!strncmp(version, "9P2000.L", 8)) 714 c->proto_version = p9_proto_2000L; 715 else if (!strncmp(version, "9P2000.u", 8)) 716 c->proto_version = p9_proto_2000u; 717 else if (!strncmp(version, "9P2000", 6)) 718 c->proto_version = p9_proto_legacy; 719 else { 720 err = -EREMOTEIO; 721 goto error; 722 } 723 724 if (msize < c->msize) 725 c->msize = msize; 726 727error: 728 kfree(version); 729 p9_free_req(c, req); 730 731 return err; 732} 733EXPORT_SYMBOL(p9_client_version); 734 735struct p9_client *p9_client_create(const char *dev_name, char *options) 736{ 737 int err; 738 struct p9_client *clnt; 739 740 err = 0; 741 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); 742 if (!clnt) 743 return ERR_PTR(-ENOMEM); 744 745 clnt->trans_mod = NULL; 746 clnt->trans = NULL; 747 spin_lock_init(&clnt->lock); 748 INIT_LIST_HEAD(&clnt->fidlist); 749 750 p9_tag_init(clnt); 751 752 err = parse_opts(options, clnt); 753 if (err < 0) 754 goto free_client; 755 756 if (!clnt->trans_mod) 757 clnt->trans_mod = v9fs_get_default_trans(); 758 759 if (clnt->trans_mod == NULL) { 760 err = -EPROTONOSUPPORT; 761 P9_DPRINTK(P9_DEBUG_ERROR, 762 "No transport defined or default transport\n"); 763 goto free_client; 764 } 765 766 clnt->fidpool = p9_idpool_create(); 767 if (IS_ERR(clnt->fidpool)) { 768 err = PTR_ERR(clnt->fidpool); 769 clnt->fidpool = NULL; 770 goto put_trans; 771 } 772 773 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", 774 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); 775 776 err = clnt->trans_mod->create(clnt, dev_name, options); 777 if (err) 778 goto destroy_fidpool; 779 780 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) 781 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; 782 783 err = p9_client_version(clnt); 784 if (err) 785 goto close_trans; 786 787 return clnt; 788 789close_trans: 790 clnt->trans_mod->close(clnt); 791destroy_fidpool: 792 p9_idpool_destroy(clnt->fidpool); 793put_trans: 794 v9fs_put_trans(clnt->trans_mod); 795free_client: 796 kfree(clnt); 797 return ERR_PTR(err); 798} 799EXPORT_SYMBOL(p9_client_create); 800 801void p9_client_destroy(struct p9_client *clnt) 802{ 803 struct p9_fid *fid, *fidptr; 804 805 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); 806 807 if (clnt->trans_mod) 808 clnt->trans_mod->close(clnt); 809 810 v9fs_put_trans(clnt->trans_mod); 811 812 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { 813 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); 814 p9_fid_destroy(fid); 815 } 816 817 if (clnt->fidpool) 818 p9_idpool_destroy(clnt->fidpool); 819 820 p9_tag_cleanup(clnt); 821 822 kfree(clnt); 823} 824EXPORT_SYMBOL(p9_client_destroy); 825 826void p9_client_disconnect(struct p9_client *clnt) 827{ 828 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 829 clnt->status = Disconnected; 830} 831EXPORT_SYMBOL(p9_client_disconnect); 832 833void p9_client_begin_disconnect(struct p9_client *clnt) 834{ 835 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 836 clnt->status = BeginDisconnect; 837} 838EXPORT_SYMBOL(p9_client_begin_disconnect); 839 840struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, 841 char *uname, u32 n_uname, char *aname) 842{ 843 int err; 844 struct p9_req_t *req; 845 struct p9_fid *fid; 846 struct p9_qid qid; 847 848 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", 849 afid ? afid->fid : -1, uname, aname); 850 err = 0; 851 852 fid = p9_fid_create(clnt); 853 if (IS_ERR(fid)) { 854 err = PTR_ERR(fid); 855 fid = NULL; 856 goto error; 857 } 858 859 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, 860 afid ? afid->fid : P9_NOFID, uname, aname, n_uname); 861 if (IS_ERR(req)) { 862 err = PTR_ERR(req); 863 goto error; 864 } 865 866 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); 867 if (err) { 868 p9pdu_dump(1, req->rc); 869 p9_free_req(clnt, req); 870 goto error; 871 } 872 873 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", 874 qid.type, 875 (unsigned long long)qid.path, 876 qid.version); 877 878 memmove(&fid->qid, &qid, sizeof(struct p9_qid)); 879 880 p9_free_req(clnt, req); 881 return fid; 882 883error: 884 if (fid) 885 p9_fid_destroy(fid); 886 return ERR_PTR(err); 887} 888EXPORT_SYMBOL(p9_client_attach); 889 890struct p9_fid * 891p9_client_auth(struct p9_client *clnt, char *uname, u32 n_uname, char *aname) 892{ 893 int err; 894 struct p9_req_t *req; 895 struct p9_qid qid; 896 struct p9_fid *afid; 897 898 P9_DPRINTK(P9_DEBUG_9P, ">>> TAUTH uname %s aname %s\n", uname, aname); 899 err = 0; 900 901 afid = p9_fid_create(clnt); 902 if (IS_ERR(afid)) { 903 err = PTR_ERR(afid); 904 afid = NULL; 905 goto error; 906 } 907 908 req = p9_client_rpc(clnt, P9_TAUTH, "dss?d", 909 afid ? afid->fid : P9_NOFID, uname, aname, n_uname); 910 if (IS_ERR(req)) { 911 err = PTR_ERR(req); 912 goto error; 913 } 914 915 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); 916 if (err) { 917 p9pdu_dump(1, req->rc); 918 p9_free_req(clnt, req); 919 goto error; 920 } 921 922 P9_DPRINTK(P9_DEBUG_9P, "<<< RAUTH qid %x.%llx.%x\n", 923 qid.type, 924 (unsigned long long)qid.path, 925 qid.version); 926 927 memmove(&afid->qid, &qid, sizeof(struct p9_qid)); 928 p9_free_req(clnt, req); 929 return afid; 930 931error: 932 if (afid) 933 p9_fid_destroy(afid); 934 return ERR_PTR(err); 935} 936EXPORT_SYMBOL(p9_client_auth); 937 938struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, 939 int clone) 940{ 941 int err; 942 struct p9_client *clnt; 943 struct p9_fid *fid; 944 struct p9_qid *wqids; 945 struct p9_req_t *req; 946 int16_t nwqids, count; 947 948 err = 0; 949 wqids = NULL; 950 clnt = oldfid->clnt; 951 if (clone) { 952 fid = p9_fid_create(clnt); 953 if (IS_ERR(fid)) { 954 err = PTR_ERR(fid); 955 fid = NULL; 956 goto error; 957 } 958 959 fid->uid = oldfid->uid; 960 } else 961 fid = oldfid; 962 963 964 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", 965 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); 966 967 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, 968 nwname, wnames); 969 if (IS_ERR(req)) { 970 err = PTR_ERR(req); 971 goto error; 972 } 973 974 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); 975 if (err) { 976 p9pdu_dump(1, req->rc); 977 p9_free_req(clnt, req); 978 goto clunk_fid; 979 } 980 p9_free_req(clnt, req); 981 982 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); 983 984 if (nwqids != nwname) { 985 err = -ENOENT; 986 goto clunk_fid; 987 } 988 989 for (count = 0; count < nwqids; count++) 990 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", 991 count, wqids[count].type, 992 (unsigned long long)wqids[count].path, 993 wqids[count].version); 994 995 if (nwname) 996 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); 997 else 998 fid->qid = oldfid->qid; 999 1000 kfree(wqids); 1001 return fid; 1002 1003clunk_fid: 1004 kfree(wqids); 1005 p9_client_clunk(fid); 1006 fid = NULL; 1007 1008error: 1009 if (fid && (fid != oldfid)) 1010 p9_fid_destroy(fid); 1011 1012 return ERR_PTR(err); 1013} 1014EXPORT_SYMBOL(p9_client_walk); 1015 1016int p9_client_open(struct p9_fid *fid, int mode) 1017{ 1018 int err; 1019 struct p9_client *clnt; 1020 struct p9_req_t *req; 1021 struct p9_qid qid; 1022 int iounit; 1023 1024 clnt = fid->clnt; 1025 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", 1026 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); 1027 err = 0; 1028 1029 if (fid->mode != -1) 1030 return -EINVAL; 1031 1032 if (p9_is_proto_dotl(clnt)) 1033 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); 1034 else 1035 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); 1036 if (IS_ERR(req)) { 1037 err = PTR_ERR(req); 1038 goto error; 1039 } 1040 1041 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1042 if (err) { 1043 p9pdu_dump(1, req->rc); 1044 goto free_and_error; 1045 } 1046 1047 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", 1048 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, 1049 (unsigned long long)qid.path, qid.version, iounit); 1050 1051 fid->mode = mode; 1052 fid->iounit = iounit; 1053 1054free_and_error: 1055 p9_free_req(clnt, req); 1056error: 1057 return err; 1058} 1059EXPORT_SYMBOL(p9_client_open); 1060 1061int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, 1062 gid_t gid, struct p9_qid *qid) 1063{ 1064 int err = 0; 1065 struct p9_client *clnt; 1066 struct p9_req_t *req; 1067 int iounit; 1068 1069 P9_DPRINTK(P9_DEBUG_9P, 1070 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", 1071 ofid->fid, name, flags, mode, gid); 1072 clnt = ofid->clnt; 1073 1074 if (ofid->mode != -1) 1075 return -EINVAL; 1076 1077 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, 1078 mode, gid); 1079 if (IS_ERR(req)) { 1080 err = PTR_ERR(req); 1081 goto error; 1082 } 1083 1084 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); 1085 if (err) { 1086 p9pdu_dump(1, req->rc); 1087 goto free_and_error; 1088 } 1089 1090 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", 1091 qid->type, 1092 (unsigned long long)qid->path, 1093 qid->version, iounit); 1094 1095 ofid->mode = mode; 1096 ofid->iounit = iounit; 1097 1098free_and_error: 1099 p9_free_req(clnt, req); 1100error: 1101 return err; 1102} 1103EXPORT_SYMBOL(p9_client_create_dotl); 1104 1105int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, 1106 char *extension) 1107{ 1108 int err; 1109 struct p9_client *clnt; 1110 struct p9_req_t *req; 1111 struct p9_qid qid; 1112 int iounit; 1113 1114 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", 1115 fid->fid, name, perm, mode); 1116 err = 0; 1117 clnt = fid->clnt; 1118 1119 if (fid->mode != -1) 1120 return -EINVAL; 1121 1122 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, 1123 mode, extension); 1124 if (IS_ERR(req)) { 1125 err = PTR_ERR(req); 1126 goto error; 1127 } 1128 1129 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1130 if (err) { 1131 p9pdu_dump(1, req->rc); 1132 goto free_and_error; 1133 } 1134 1135 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", 1136 qid.type, 1137 (unsigned long long)qid.path, 1138 qid.version, iounit); 1139 1140 fid->mode = mode; 1141 fid->iounit = iounit; 1142 1143free_and_error: 1144 p9_free_req(clnt, req); 1145error: 1146 return err; 1147} 1148EXPORT_SYMBOL(p9_client_fcreate); 1149 1150int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, 1151 struct p9_qid *qid) 1152{ 1153 int err = 0; 1154 struct p9_client *clnt; 1155 struct p9_req_t *req; 1156 1157 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", 1158 dfid->fid, name, symtgt); 1159 clnt = dfid->clnt; 1160 1161 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, 1162 gid); 1163 if (IS_ERR(req)) { 1164 err = PTR_ERR(req); 1165 goto error; 1166 } 1167 1168 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1169 if (err) { 1170 p9pdu_dump(1, req->rc); 1171 goto free_and_error; 1172 } 1173 1174 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", 1175 qid->type, (unsigned long long)qid->path, qid->version); 1176 1177free_and_error: 1178 p9_free_req(clnt, req); 1179error: 1180 return err; 1181} 1182EXPORT_SYMBOL(p9_client_symlink); 1183 1184int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) 1185{ 1186 struct p9_client *clnt; 1187 struct p9_req_t *req; 1188 1189 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", 1190 dfid->fid, oldfid->fid, newname); 1191 clnt = dfid->clnt; 1192 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, 1193 newname); 1194 if (IS_ERR(req)) 1195 return PTR_ERR(req); 1196 1197 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); 1198 p9_free_req(clnt, req); 1199 return 0; 1200} 1201EXPORT_SYMBOL(p9_client_link); 1202 1203int p9_client_clunk(struct p9_fid *fid) 1204{ 1205 int err; 1206 struct p9_client *clnt; 1207 struct p9_req_t *req; 1208 1209 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); 1210 err = 0; 1211 clnt = fid->clnt; 1212 1213 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); 1214 if (IS_ERR(req)) { 1215 err = PTR_ERR(req); 1216 goto error; 1217 } 1218 1219 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); 1220 1221 p9_free_req(clnt, req); 1222 p9_fid_destroy(fid); 1223 1224error: 1225 return err; 1226} 1227EXPORT_SYMBOL(p9_client_clunk); 1228 1229int p9_client_remove(struct p9_fid *fid) 1230{ 1231 int err; 1232 struct p9_client *clnt; 1233 struct p9_req_t *req; 1234 1235 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); 1236 err = 0; 1237 clnt = fid->clnt; 1238 1239 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); 1240 if (IS_ERR(req)) { 1241 err = PTR_ERR(req); 1242 goto error; 1243 } 1244 1245 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); 1246 1247 p9_free_req(clnt, req); 1248error: 1249 p9_fid_destroy(fid); 1250 return err; 1251} 1252EXPORT_SYMBOL(p9_client_remove); 1253 1254int 1255p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, 1256 u32 count) 1257{ 1258 int err, rsize, total; 1259 struct p9_client *clnt; 1260 struct p9_req_t *req; 1261 char *dataptr; 1262 1263 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, 1264 (long long unsigned) offset, count); 1265 err = 0; 1266 clnt = fid->clnt; 1267 total = 0; 1268 1269 rsize = fid->iounit; 1270 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1271 rsize = clnt->msize - P9_IOHDRSZ; 1272 1273 if (count < rsize) 1274 rsize = count; 1275 1276 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); 1277 if (IS_ERR(req)) { 1278 err = PTR_ERR(req); 1279 goto error; 1280 } 1281 1282 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1283 if (err) { 1284 p9pdu_dump(1, req->rc); 1285 goto free_and_error; 1286 } 1287 1288 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); 1289 1290 if (data) { 1291 memmove(data, dataptr, count); 1292 } 1293 1294 if (udata) { 1295 err = copy_to_user(udata, dataptr, count); 1296 if (err) { 1297 err = -EFAULT; 1298 goto free_and_error; 1299 } 1300 } 1301 1302 p9_free_req(clnt, req); 1303 return count; 1304 1305free_and_error: 1306 p9_free_req(clnt, req); 1307error: 1308 return err; 1309} 1310EXPORT_SYMBOL(p9_client_read); 1311 1312int 1313p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, 1314 u64 offset, u32 count) 1315{ 1316 int err, rsize, total; 1317 struct p9_client *clnt; 1318 struct p9_req_t *req; 1319 1320 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", 1321 fid->fid, (long long unsigned) offset, count); 1322 err = 0; 1323 clnt = fid->clnt; 1324 total = 0; 1325 1326 rsize = fid->iounit; 1327 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1328 rsize = clnt->msize - P9_IOHDRSZ; 1329 1330 if (count < rsize) 1331 rsize = count; 1332 if (data) 1333 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, 1334 rsize, data); 1335 else 1336 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, 1337 rsize, udata); 1338 if (IS_ERR(req)) { 1339 err = PTR_ERR(req); 1340 goto error; 1341 } 1342 1343 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); 1344 if (err) { 1345 p9pdu_dump(1, req->rc); 1346 goto free_and_error; 1347 } 1348 1349 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); 1350 1351 p9_free_req(clnt, req); 1352 return count; 1353 1354free_and_error: 1355 p9_free_req(clnt, req); 1356error: 1357 return err; 1358} 1359EXPORT_SYMBOL(p9_client_write); 1360 1361struct p9_wstat *p9_client_stat(struct p9_fid *fid) 1362{ 1363 int err; 1364 struct p9_client *clnt; 1365 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); 1366 struct p9_req_t *req; 1367 u16 ignored; 1368 1369 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); 1370 1371 if (!ret) 1372 return ERR_PTR(-ENOMEM); 1373 1374 err = 0; 1375 clnt = fid->clnt; 1376 1377 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); 1378 if (IS_ERR(req)) { 1379 err = PTR_ERR(req); 1380 goto error; 1381 } 1382 1383 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); 1384 if (err) { 1385 p9pdu_dump(1, req->rc); 1386 p9_free_req(clnt, req); 1387 goto error; 1388 } 1389 1390 P9_DPRINTK(P9_DEBUG_9P, 1391 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1392 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1393 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1394 "<<< uid=%d gid=%d n_muid=%d\n", 1395 ret->size, ret->type, ret->dev, ret->qid.type, 1396 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, 1397 ret->atime, ret->mtime, (unsigned long long)ret->length, 1398 ret->name, ret->uid, ret->gid, ret->muid, ret->extension, 1399 ret->n_uid, ret->n_gid, ret->n_muid); 1400 1401 p9_free_req(clnt, req); 1402 return ret; 1403 1404error: 1405 kfree(ret); 1406 return ERR_PTR(err); 1407} 1408EXPORT_SYMBOL(p9_client_stat); 1409 1410struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, 1411 u64 request_mask) 1412{ 1413 int err; 1414 struct p9_client *clnt; 1415 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), 1416 GFP_KERNEL); 1417 struct p9_req_t *req; 1418 1419 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", 1420 fid->fid, request_mask); 1421 1422 if (!ret) 1423 return ERR_PTR(-ENOMEM); 1424 1425 err = 0; 1426 clnt = fid->clnt; 1427 1428 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); 1429 if (IS_ERR(req)) { 1430 err = PTR_ERR(req); 1431 goto error; 1432 } 1433 1434 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); 1435 if (err) { 1436 p9pdu_dump(1, req->rc); 1437 p9_free_req(clnt, req); 1438 goto error; 1439 } 1440 1441 P9_DPRINTK(P9_DEBUG_9P, 1442 "<<< RGETATTR st_result_mask=%lld\n" 1443 "<<< qid=%x.%llx.%x\n" 1444 "<<< st_mode=%8.8x st_nlink=%llu\n" 1445 "<<< st_uid=%d st_gid=%d\n" 1446 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" 1447 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" 1448 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" 1449 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" 1450 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" 1451 "<<< st_gen=%lld st_data_version=%lld", 1452 ret->st_result_mask, ret->qid.type, ret->qid.path, 1453 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, 1454 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, 1455 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, 1456 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, 1457 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, 1458 ret->st_gen, ret->st_data_version); 1459 1460 p9_free_req(clnt, req); 1461 return ret; 1462 1463error: 1464 kfree(ret); 1465 return ERR_PTR(err); 1466} 1467EXPORT_SYMBOL(p9_client_getattr_dotl); 1468 1469static int p9_client_statsize(struct p9_wstat *wst, int proto_version) 1470{ 1471 int ret; 1472 1473 /* NOTE: size shouldn't include its own length */ 1474 /* size[2] type[2] dev[4] qid[13] */ 1475 /* mode[4] atime[4] mtime[4] length[8]*/ 1476 /* name[s] uid[s] gid[s] muid[s] */ 1477 ret = 2+4+13+4+4+4+8+2+2+2+2; 1478 1479 if (wst->name) 1480 ret += strlen(wst->name); 1481 if (wst->uid) 1482 ret += strlen(wst->uid); 1483 if (wst->gid) 1484 ret += strlen(wst->gid); 1485 if (wst->muid) 1486 ret += strlen(wst->muid); 1487 1488 if ((proto_version == p9_proto_2000u) || 1489 (proto_version == p9_proto_2000L)) { 1490 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ 1491 if (wst->extension) 1492 ret += strlen(wst->extension); 1493 } 1494 1495 return ret; 1496} 1497 1498int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) 1499{ 1500 int err; 1501 struct p9_req_t *req; 1502 struct p9_client *clnt; 1503 1504 err = 0; 1505 clnt = fid->clnt; 1506 wst->size = p9_client_statsize(wst, clnt->proto_version); 1507 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); 1508 P9_DPRINTK(P9_DEBUG_9P, 1509 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1510 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1511 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1512 " uid=%d gid=%d n_muid=%d\n", 1513 wst->size, wst->type, wst->dev, wst->qid.type, 1514 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, 1515 wst->atime, wst->mtime, (unsigned long long)wst->length, 1516 wst->name, wst->uid, wst->gid, wst->muid, wst->extension, 1517 wst->n_uid, wst->n_gid, wst->n_muid); 1518 1519 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); 1520 if (IS_ERR(req)) { 1521 err = PTR_ERR(req); 1522 goto error; 1523 } 1524 1525 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); 1526 1527 p9_free_req(clnt, req); 1528error: 1529 return err; 1530} 1531EXPORT_SYMBOL(p9_client_wstat); 1532 1533int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) 1534{ 1535 int err; 1536 struct p9_req_t *req; 1537 struct p9_client *clnt; 1538 1539 err = 0; 1540 clnt = fid->clnt; 1541 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); 1542 P9_DPRINTK(P9_DEBUG_9P, 1543 " valid=%x mode=%x uid=%d gid=%d size=%lld\n" 1544 " atime_sec=%lld atime_nsec=%lld\n" 1545 " mtime_sec=%lld mtime_nsec=%lld\n", 1546 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, 1547 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, 1548 p9attr->mtime_sec, p9attr->mtime_nsec); 1549 1550 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); 1551 1552 if (IS_ERR(req)) { 1553 err = PTR_ERR(req); 1554 goto error; 1555 } 1556 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); 1557 p9_free_req(clnt, req); 1558error: 1559 return err; 1560} 1561EXPORT_SYMBOL(p9_client_setattr); 1562 1563int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) 1564{ 1565 int err; 1566 struct p9_req_t *req; 1567 struct p9_client *clnt; 1568 1569 err = 0; 1570 clnt = fid->clnt; 1571 1572 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); 1573 1574 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); 1575 if (IS_ERR(req)) { 1576 err = PTR_ERR(req); 1577 goto error; 1578 } 1579 1580 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, 1581 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, 1582 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); 1583 if (err) { 1584 p9pdu_dump(1, req->rc); 1585 p9_free_req(clnt, req); 1586 goto error; 1587 } 1588 1589 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " 1590 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " 1591 "fsid %llu namelen %ld\n", 1592 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, 1593 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, 1594 sb->fsid, (long int)sb->namelen); 1595 1596 p9_free_req(clnt, req); 1597error: 1598 return err; 1599} 1600EXPORT_SYMBOL(p9_client_statfs); 1601 1602int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) 1603{ 1604 int err; 1605 struct p9_req_t *req; 1606 struct p9_client *clnt; 1607 1608 err = 0; 1609 clnt = fid->clnt; 1610 1611 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", 1612 fid->fid, newdirfid->fid, name); 1613 1614 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, 1615 newdirfid->fid, name); 1616 if (IS_ERR(req)) { 1617 err = PTR_ERR(req); 1618 goto error; 1619 } 1620 1621 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); 1622 1623 p9_free_req(clnt, req); 1624error: 1625 return err; 1626} 1627EXPORT_SYMBOL(p9_client_rename); 1628 1629/* 1630 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace 1631 */ 1632struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, 1633 const char *attr_name, u64 *attr_size) 1634{ 1635 int err; 1636 struct p9_req_t *req; 1637 struct p9_client *clnt; 1638 struct p9_fid *attr_fid; 1639 1640 err = 0; 1641 clnt = file_fid->clnt; 1642 attr_fid = p9_fid_create(clnt); 1643 if (IS_ERR(attr_fid)) { 1644 err = PTR_ERR(attr_fid); 1645 attr_fid = NULL; 1646 goto error; 1647 } 1648 P9_DPRINTK(P9_DEBUG_9P, 1649 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", 1650 file_fid->fid, attr_fid->fid, attr_name); 1651 1652 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", 1653 file_fid->fid, attr_fid->fid, attr_name); 1654 if (IS_ERR(req)) { 1655 err = PTR_ERR(req); 1656 goto error; 1657 } 1658 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); 1659 if (err) { 1660 p9pdu_dump(1, req->rc); 1661 p9_free_req(clnt, req); 1662 goto clunk_fid; 1663 } 1664 p9_free_req(clnt, req); 1665 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", 1666 attr_fid->fid, *attr_size); 1667 return attr_fid; 1668clunk_fid: 1669 p9_client_clunk(attr_fid); 1670 attr_fid = NULL; 1671error: 1672 if (attr_fid && (attr_fid != file_fid)) 1673 p9_fid_destroy(attr_fid); 1674 1675 return ERR_PTR(err); 1676} 1677EXPORT_SYMBOL_GPL(p9_client_xattrwalk); 1678 1679int p9_client_xattrcreate(struct p9_fid *fid, const char *name, 1680 u64 attr_size, int flags) 1681{ 1682 int err; 1683 struct p9_req_t *req; 1684 struct p9_client *clnt; 1685 1686 P9_DPRINTK(P9_DEBUG_9P, 1687 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", 1688 fid->fid, name, (long long)attr_size, flags); 1689 err = 0; 1690 clnt = fid->clnt; 1691 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", 1692 fid->fid, name, attr_size, flags); 1693 if (IS_ERR(req)) { 1694 err = PTR_ERR(req); 1695 goto error; 1696 } 1697 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); 1698 p9_free_req(clnt, req); 1699error: 1700 return err; 1701} 1702EXPORT_SYMBOL_GPL(p9_client_xattrcreate); 1703 1704int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) 1705{ 1706 int err, rsize, total; 1707 struct p9_client *clnt; 1708 struct p9_req_t *req; 1709 char *dataptr; 1710 1711 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", 1712 fid->fid, (long long unsigned) offset, count); 1713 1714 err = 0; 1715 clnt = fid->clnt; 1716 total = 0; 1717 1718 rsize = fid->iounit; 1719 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) 1720 rsize = clnt->msize - P9_READDIRHDRSZ; 1721 1722 if (count < rsize) 1723 rsize = count; 1724 1725 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); 1726 if (IS_ERR(req)) { 1727 err = PTR_ERR(req); 1728 goto error; 1729 } 1730 1731 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1732 if (err) { 1733 p9pdu_dump(1, req->rc); 1734 goto free_and_error; 1735 } 1736 1737 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); 1738 1739 if (data) 1740 memmove(data, dataptr, count); 1741 1742 p9_free_req(clnt, req); 1743 return count; 1744 1745free_and_error: 1746 p9_free_req(clnt, req); 1747error: 1748 return err; 1749} 1750EXPORT_SYMBOL(p9_client_readdir); 1751 1752int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, 1753 dev_t rdev, gid_t gid, struct p9_qid *qid) 1754{ 1755 int err; 1756 struct p9_client *clnt; 1757 struct p9_req_t *req; 1758 1759 err = 0; 1760 clnt = fid->clnt; 1761 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " 1762 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); 1763 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, 1764 MAJOR(rdev), MINOR(rdev), gid); 1765 if (IS_ERR(req)) 1766 return PTR_ERR(req); 1767 1768 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1769 if (err) { 1770 p9pdu_dump(1, req->rc); 1771 goto error; 1772 } 1773 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, 1774 (unsigned long long)qid->path, qid->version); 1775 1776error: 1777 p9_free_req(clnt, req); 1778 return err; 1779 1780} 1781EXPORT_SYMBOL(p9_client_mknod_dotl); 1782 1783int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, 1784 gid_t gid, struct p9_qid *qid) 1785{ 1786 int err; 1787 struct p9_client *clnt; 1788 struct p9_req_t *req; 1789 1790 err = 0; 1791 clnt = fid->clnt; 1792 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", 1793 fid->fid, name, mode, gid); 1794 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, 1795 gid); 1796 if (IS_ERR(req)) 1797 return PTR_ERR(req); 1798 1799 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1800 if (err) { 1801 p9pdu_dump(1, req->rc); 1802 goto error; 1803 } 1804 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, 1805 (unsigned long long)qid->path, qid->version); 1806 1807error: 1808 p9_free_req(clnt, req); 1809 return err; 1810 1811} 1812EXPORT_SYMBOL(p9_client_mkdir_dotl); 1813