client.c revision f085312204f384a0277a66c3c48ba8f9edcd58f2
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_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 356static 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 */ 372void 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} 378EXPORT_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 389int 390p9_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 422rewind_and_exit: 423 if (rewind) 424 pdu->offset = offset; 425 return err; 426} 427EXPORT_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 440static 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 491static 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 528static struct p9_req_t * 529p9_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 616reterr: 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 623static 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 652error: 653 kfree(fid); 654 return ERR_PTR(ret); 655} 656 657static 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 672int 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 725error: 726 kfree(version); 727 p9_free_req(c, req); 728 729 return err; 730} 731EXPORT_SYMBOL(p9_client_version); 732 733struct 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 787close_trans: 788 clnt->trans_mod->close(clnt); 789destroy_fidpool: 790 p9_idpool_destroy(clnt->fidpool); 791put_trans: 792 v9fs_put_trans(clnt->trans_mod); 793free_client: 794 kfree(clnt); 795 return ERR_PTR(err); 796} 797EXPORT_SYMBOL(p9_client_create); 798 799void 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} 822EXPORT_SYMBOL(p9_client_destroy); 823 824void p9_client_disconnect(struct p9_client *clnt) 825{ 826 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 827 clnt->status = Disconnected; 828} 829EXPORT_SYMBOL(p9_client_disconnect); 830 831void p9_client_begin_disconnect(struct p9_client *clnt) 832{ 833 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 834 clnt->status = BeginDisconnect; 835} 836EXPORT_SYMBOL(p9_client_begin_disconnect); 837 838struct 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 881error: 882 if (fid) 883 p9_fid_destroy(fid); 884 return ERR_PTR(err); 885} 886EXPORT_SYMBOL(p9_client_attach); 887 888struct p9_fid * 889p9_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 929error: 930 if (afid) 931 p9_fid_destroy(afid); 932 return ERR_PTR(err); 933} 934EXPORT_SYMBOL(p9_client_auth); 935 936struct 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 999clunk_fid: 1000 p9_client_clunk(fid); 1001 fid = NULL; 1002 1003error: 1004 if (fid && (fid != oldfid)) 1005 p9_fid_destroy(fid); 1006 1007 return ERR_PTR(err); 1008} 1009EXPORT_SYMBOL(p9_client_walk); 1010 1011int 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 P9_DPRINTK(P9_DEBUG_9P, ">>> TOPEN fid %d mode %d\n", fid->fid, mode); 1020 err = 0; 1021 clnt = fid->clnt; 1022 1023 if (fid->mode != -1) 1024 return -EINVAL; 1025 1026 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); 1027 if (IS_ERR(req)) { 1028 err = PTR_ERR(req); 1029 goto error; 1030 } 1031 1032 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1033 if (err) { 1034 p9pdu_dump(1, req->rc); 1035 goto free_and_error; 1036 } 1037 1038 P9_DPRINTK(P9_DEBUG_9P, "<<< ROPEN qid %x.%llx.%x iounit %x\n", 1039 qid.type, 1040 (unsigned long long)qid.path, 1041 qid.version, iounit); 1042 1043 fid->mode = mode; 1044 fid->iounit = iounit; 1045 1046free_and_error: 1047 p9_free_req(clnt, req); 1048error: 1049 return err; 1050} 1051EXPORT_SYMBOL(p9_client_open); 1052 1053int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, 1054 char *extension) 1055{ 1056 int err; 1057 struct p9_client *clnt; 1058 struct p9_req_t *req; 1059 struct p9_qid qid; 1060 int iounit; 1061 1062 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", 1063 fid->fid, name, perm, mode); 1064 err = 0; 1065 clnt = fid->clnt; 1066 1067 if (fid->mode != -1) 1068 return -EINVAL; 1069 1070 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, 1071 mode, extension); 1072 if (IS_ERR(req)) { 1073 err = PTR_ERR(req); 1074 goto error; 1075 } 1076 1077 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1078 if (err) { 1079 p9pdu_dump(1, req->rc); 1080 goto free_and_error; 1081 } 1082 1083 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", 1084 qid.type, 1085 (unsigned long long)qid.path, 1086 qid.version, iounit); 1087 1088 fid->mode = mode; 1089 fid->iounit = iounit; 1090 1091free_and_error: 1092 p9_free_req(clnt, req); 1093error: 1094 return err; 1095} 1096EXPORT_SYMBOL(p9_client_fcreate); 1097 1098int p9_client_clunk(struct p9_fid *fid) 1099{ 1100 int err; 1101 struct p9_client *clnt; 1102 struct p9_req_t *req; 1103 1104 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); 1105 err = 0; 1106 clnt = fid->clnt; 1107 1108 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); 1109 if (IS_ERR(req)) { 1110 err = PTR_ERR(req); 1111 goto error; 1112 } 1113 1114 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); 1115 1116 p9_free_req(clnt, req); 1117 p9_fid_destroy(fid); 1118 1119error: 1120 return err; 1121} 1122EXPORT_SYMBOL(p9_client_clunk); 1123 1124int p9_client_remove(struct p9_fid *fid) 1125{ 1126 int err; 1127 struct p9_client *clnt; 1128 struct p9_req_t *req; 1129 1130 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); 1131 err = 0; 1132 clnt = fid->clnt; 1133 1134 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); 1135 if (IS_ERR(req)) { 1136 err = PTR_ERR(req); 1137 goto error; 1138 } 1139 1140 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); 1141 1142 p9_free_req(clnt, req); 1143 p9_fid_destroy(fid); 1144 1145error: 1146 return err; 1147} 1148EXPORT_SYMBOL(p9_client_remove); 1149 1150int 1151p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, 1152 u32 count) 1153{ 1154 int err, rsize, total; 1155 struct p9_client *clnt; 1156 struct p9_req_t *req; 1157 char *dataptr; 1158 1159 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, 1160 (long long unsigned) offset, count); 1161 err = 0; 1162 clnt = fid->clnt; 1163 total = 0; 1164 1165 rsize = fid->iounit; 1166 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1167 rsize = clnt->msize - P9_IOHDRSZ; 1168 1169 if (count < rsize) 1170 rsize = count; 1171 1172 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); 1173 if (IS_ERR(req)) { 1174 err = PTR_ERR(req); 1175 goto error; 1176 } 1177 1178 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1179 if (err) { 1180 p9pdu_dump(1, req->rc); 1181 goto free_and_error; 1182 } 1183 1184 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); 1185 1186 if (data) { 1187 memmove(data, dataptr, count); 1188 } 1189 1190 if (udata) { 1191 err = copy_to_user(udata, dataptr, count); 1192 if (err) { 1193 err = -EFAULT; 1194 goto free_and_error; 1195 } 1196 } 1197 1198 p9_free_req(clnt, req); 1199 return count; 1200 1201free_and_error: 1202 p9_free_req(clnt, req); 1203error: 1204 return err; 1205} 1206EXPORT_SYMBOL(p9_client_read); 1207 1208int 1209p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, 1210 u64 offset, u32 count) 1211{ 1212 int err, rsize, total; 1213 struct p9_client *clnt; 1214 struct p9_req_t *req; 1215 1216 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", 1217 fid->fid, (long long unsigned) offset, count); 1218 err = 0; 1219 clnt = fid->clnt; 1220 total = 0; 1221 1222 rsize = fid->iounit; 1223 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1224 rsize = clnt->msize - P9_IOHDRSZ; 1225 1226 if (count < rsize) 1227 rsize = count; 1228 if (data) 1229 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, 1230 rsize, data); 1231 else 1232 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, 1233 rsize, udata); 1234 if (IS_ERR(req)) { 1235 err = PTR_ERR(req); 1236 goto error; 1237 } 1238 1239 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); 1240 if (err) { 1241 p9pdu_dump(1, req->rc); 1242 goto free_and_error; 1243 } 1244 1245 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); 1246 1247 p9_free_req(clnt, req); 1248 return count; 1249 1250free_and_error: 1251 p9_free_req(clnt, req); 1252error: 1253 return err; 1254} 1255EXPORT_SYMBOL(p9_client_write); 1256 1257struct p9_wstat *p9_client_stat(struct p9_fid *fid) 1258{ 1259 int err; 1260 struct p9_client *clnt; 1261 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); 1262 struct p9_req_t *req; 1263 u16 ignored; 1264 1265 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); 1266 1267 if (!ret) 1268 return ERR_PTR(-ENOMEM); 1269 1270 err = 0; 1271 clnt = fid->clnt; 1272 1273 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); 1274 if (IS_ERR(req)) { 1275 err = PTR_ERR(req); 1276 goto error; 1277 } 1278 1279 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); 1280 if (err) { 1281 p9pdu_dump(1, req->rc); 1282 p9_free_req(clnt, req); 1283 goto error; 1284 } 1285 1286 P9_DPRINTK(P9_DEBUG_9P, 1287 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1288 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1289 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1290 "<<< uid=%d gid=%d n_muid=%d\n", 1291 ret->size, ret->type, ret->dev, ret->qid.type, 1292 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, 1293 ret->atime, ret->mtime, (unsigned long long)ret->length, 1294 ret->name, ret->uid, ret->gid, ret->muid, ret->extension, 1295 ret->n_uid, ret->n_gid, ret->n_muid); 1296 1297 p9_free_req(clnt, req); 1298 return ret; 1299 1300error: 1301 kfree(ret); 1302 return ERR_PTR(err); 1303} 1304EXPORT_SYMBOL(p9_client_stat); 1305 1306struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, 1307 u64 request_mask) 1308{ 1309 int err; 1310 struct p9_client *clnt; 1311 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), 1312 GFP_KERNEL); 1313 struct p9_req_t *req; 1314 1315 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", 1316 fid->fid, request_mask); 1317 1318 if (!ret) 1319 return ERR_PTR(-ENOMEM); 1320 1321 err = 0; 1322 clnt = fid->clnt; 1323 1324 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); 1325 if (IS_ERR(req)) { 1326 err = PTR_ERR(req); 1327 goto error; 1328 } 1329 1330 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); 1331 if (err) { 1332 p9pdu_dump(1, req->rc); 1333 p9_free_req(clnt, req); 1334 goto error; 1335 } 1336 1337 P9_DPRINTK(P9_DEBUG_9P, 1338 "<<< RGETATTR st_result_mask=%lld\n" 1339 "<<< qid=%x.%llx.%x\n" 1340 "<<< st_mode=%8.8x st_nlink=%llu\n" 1341 "<<< st_uid=%d st_gid=%d\n" 1342 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" 1343 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" 1344 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" 1345 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" 1346 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" 1347 "<<< st_gen=%lld st_data_version=%lld", 1348 ret->st_result_mask, ret->qid.type, ret->qid.path, 1349 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, 1350 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, 1351 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, 1352 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, 1353 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, 1354 ret->st_gen, ret->st_data_version); 1355 1356 p9_free_req(clnt, req); 1357 return ret; 1358 1359error: 1360 kfree(ret); 1361 return ERR_PTR(err); 1362} 1363EXPORT_SYMBOL(p9_client_getattr_dotl); 1364 1365static int p9_client_statsize(struct p9_wstat *wst, int proto_version) 1366{ 1367 int ret; 1368 1369 /* NOTE: size shouldn't include its own length */ 1370 /* size[2] type[2] dev[4] qid[13] */ 1371 /* mode[4] atime[4] mtime[4] length[8]*/ 1372 /* name[s] uid[s] gid[s] muid[s] */ 1373 ret = 2+4+13+4+4+4+8+2+2+2+2; 1374 1375 if (wst->name) 1376 ret += strlen(wst->name); 1377 if (wst->uid) 1378 ret += strlen(wst->uid); 1379 if (wst->gid) 1380 ret += strlen(wst->gid); 1381 if (wst->muid) 1382 ret += strlen(wst->muid); 1383 1384 if ((proto_version == p9_proto_2000u) || 1385 (proto_version == p9_proto_2000L)) { 1386 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ 1387 if (wst->extension) 1388 ret += strlen(wst->extension); 1389 } 1390 1391 return ret; 1392} 1393 1394int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) 1395{ 1396 int err; 1397 struct p9_req_t *req; 1398 struct p9_client *clnt; 1399 1400 err = 0; 1401 clnt = fid->clnt; 1402 wst->size = p9_client_statsize(wst, clnt->proto_version); 1403 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); 1404 P9_DPRINTK(P9_DEBUG_9P, 1405 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1406 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1407 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1408 " uid=%d gid=%d n_muid=%d\n", 1409 wst->size, wst->type, wst->dev, wst->qid.type, 1410 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, 1411 wst->atime, wst->mtime, (unsigned long long)wst->length, 1412 wst->name, wst->uid, wst->gid, wst->muid, wst->extension, 1413 wst->n_uid, wst->n_gid, wst->n_muid); 1414 1415 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); 1416 if (IS_ERR(req)) { 1417 err = PTR_ERR(req); 1418 goto error; 1419 } 1420 1421 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); 1422 1423 p9_free_req(clnt, req); 1424error: 1425 return err; 1426} 1427EXPORT_SYMBOL(p9_client_wstat); 1428 1429int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) 1430{ 1431 int err; 1432 struct p9_req_t *req; 1433 struct p9_client *clnt; 1434 1435 err = 0; 1436 clnt = fid->clnt; 1437 1438 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); 1439 1440 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); 1441 if (IS_ERR(req)) { 1442 err = PTR_ERR(req); 1443 goto error; 1444 } 1445 1446 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, 1447 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, 1448 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); 1449 if (err) { 1450 p9pdu_dump(1, req->rc); 1451 p9_free_req(clnt, req); 1452 goto error; 1453 } 1454 1455 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " 1456 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " 1457 "fsid %llu namelen %ld\n", 1458 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, 1459 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, 1460 sb->fsid, (long int)sb->namelen); 1461 1462 p9_free_req(clnt, req); 1463error: 1464 return err; 1465} 1466EXPORT_SYMBOL(p9_client_statfs); 1467 1468int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) 1469{ 1470 int err; 1471 struct p9_req_t *req; 1472 struct p9_client *clnt; 1473 1474 err = 0; 1475 clnt = fid->clnt; 1476 1477 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", 1478 fid->fid, newdirfid->fid, name); 1479 1480 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, 1481 newdirfid->fid, name); 1482 if (IS_ERR(req)) { 1483 err = PTR_ERR(req); 1484 goto error; 1485 } 1486 1487 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); 1488 1489 p9_free_req(clnt, req); 1490error: 1491 return err; 1492} 1493EXPORT_SYMBOL(p9_client_rename); 1494 1495int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) 1496{ 1497 int err, rsize, total; 1498 struct p9_client *clnt; 1499 struct p9_req_t *req; 1500 char *dataptr; 1501 1502 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", 1503 fid->fid, (long long unsigned) offset, count); 1504 1505 err = 0; 1506 clnt = fid->clnt; 1507 total = 0; 1508 1509 rsize = fid->iounit; 1510 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) 1511 rsize = clnt->msize - P9_READDIRHDRSZ; 1512 1513 if (count < rsize) 1514 rsize = count; 1515 1516 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); 1517 if (IS_ERR(req)) { 1518 err = PTR_ERR(req); 1519 goto error; 1520 } 1521 1522 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1523 if (err) { 1524 p9pdu_dump(1, req->rc); 1525 goto free_and_error; 1526 } 1527 1528 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); 1529 1530 if (data) 1531 memmove(data, dataptr, count); 1532 1533 p9_free_req(clnt, req); 1534 return count; 1535 1536free_and_error: 1537 p9_free_req(clnt, req); 1538error: 1539 return err; 1540} 1541EXPORT_SYMBOL(p9_client_readdir); 1542