client.c revision 52f44e0d08ff1a065bf06615483c608163575cb1
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 || type == P9_RLERROR) { 454 int ecode; 455 456 if (!p9_is_proto_dotl(c)) { 457 char *ename; 458 459 err = p9pdu_readf(req->rc, c->proto_version, "s?d", 460 &ename, &ecode); 461 if (err) 462 goto out_err; 463 464 if (p9_is_proto_dotu(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 } 474 } else { 475 err = p9pdu_readf(req->rc, c->proto_version, "d", &ecode); 476 err = -ecode; 477 478 P9_DPRINTK(P9_DEBUG_9P, "<<< RLERROR (%d)\n", -ecode); 479 } 480 481 } else 482 err = 0; 483 484 return err; 485 486out_err: 487 P9_DPRINTK(P9_DEBUG_ERROR, "couldn't parse error%d\n", err); 488 489 return err; 490} 491 492/** 493 * p9_client_flush - flush (cancel) a request 494 * @c: client state 495 * @oldreq: request to cancel 496 * 497 * This sents a flush for a particular requests and links 498 * the flush request to the original request. The current 499 * code only supports a single flush request although the protocol 500 * allows for multiple flush requests to be sent for a single request. 501 * 502 */ 503 504static int p9_client_flush(struct p9_client *c, struct p9_req_t *oldreq) 505{ 506 struct p9_req_t *req; 507 int16_t oldtag; 508 int err; 509 510 err = p9_parse_header(oldreq->tc, NULL, NULL, &oldtag, 1); 511 if (err) 512 return err; 513 514 P9_DPRINTK(P9_DEBUG_9P, ">>> TFLUSH tag %d\n", oldtag); 515 516 req = p9_client_rpc(c, P9_TFLUSH, "w", oldtag); 517 if (IS_ERR(req)) 518 return PTR_ERR(req); 519 520 521 /* if we haven't received a response for oldreq, 522 remove it from the list. */ 523 spin_lock(&c->lock); 524 if (oldreq->status == REQ_STATUS_FLSH) 525 list_del(&oldreq->req_list); 526 spin_unlock(&c->lock); 527 528 p9_free_req(c, req); 529 return 0; 530} 531 532/** 533 * p9_client_rpc - issue a request and wait for a response 534 * @c: client session 535 * @type: type of request 536 * @fmt: protocol format string (see protocol.c) 537 * 538 * Returns request structure (which client must free using p9_free_req) 539 */ 540 541static struct p9_req_t * 542p9_client_rpc(struct p9_client *c, int8_t type, const char *fmt, ...) 543{ 544 va_list ap; 545 int tag, err; 546 struct p9_req_t *req; 547 unsigned long flags; 548 int sigpending; 549 550 P9_DPRINTK(P9_DEBUG_MUX, "client %p op %d\n", c, type); 551 552 /* we allow for any status other than disconnected */ 553 if (c->status == Disconnected) 554 return ERR_PTR(-EIO); 555 556 /* if status is begin_disconnected we allow only clunk request */ 557 if ((c->status == BeginDisconnect) && (type != P9_TCLUNK)) 558 return ERR_PTR(-EIO); 559 560 if (signal_pending(current)) { 561 sigpending = 1; 562 clear_thread_flag(TIF_SIGPENDING); 563 } else 564 sigpending = 0; 565 566 tag = P9_NOTAG; 567 if (type != P9_TVERSION) { 568 tag = p9_idpool_get(c->tagpool); 569 if (tag < 0) 570 return ERR_PTR(-ENOMEM); 571 } 572 573 req = p9_tag_alloc(c, tag); 574 if (IS_ERR(req)) 575 return req; 576 577 /* marshall the data */ 578 p9pdu_prepare(req->tc, tag, type); 579 va_start(ap, fmt); 580 err = p9pdu_vwritef(req->tc, c->proto_version, fmt, ap); 581 va_end(ap); 582 p9pdu_finalize(req->tc); 583 584 err = c->trans_mod->request(c, req); 585 if (err < 0) { 586 if (err != -ERESTARTSYS) 587 c->status = Disconnected; 588 goto reterr; 589 } 590 591 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d\n", req->wq, tag); 592 err = wait_event_interruptible(*req->wq, 593 req->status >= REQ_STATUS_RCVD); 594 P9_DPRINTK(P9_DEBUG_MUX, "wait %p tag: %d returned %d\n", 595 req->wq, tag, err); 596 597 if (req->status == REQ_STATUS_ERROR) { 598 P9_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); 599 err = req->t_err; 600 } 601 602 if ((err == -ERESTARTSYS) && (c->status == Connected)) { 603 P9_DPRINTK(P9_DEBUG_MUX, "flushing\n"); 604 sigpending = 1; 605 clear_thread_flag(TIF_SIGPENDING); 606 607 if (c->trans_mod->cancel(c, req)) 608 p9_client_flush(c, req); 609 610 /* if we received the response anyway, don't signal error */ 611 if (req->status == REQ_STATUS_RCVD) 612 err = 0; 613 } 614 615 if (sigpending) { 616 spin_lock_irqsave(¤t->sighand->siglock, flags); 617 recalc_sigpending(); 618 spin_unlock_irqrestore(¤t->sighand->siglock, flags); 619 } 620 621 if (err < 0) 622 goto reterr; 623 624 err = p9_check_errors(c, req); 625 if (!err) { 626 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d\n", c, type); 627 return req; 628 } 629 630reterr: 631 P9_DPRINTK(P9_DEBUG_MUX, "exit: client %p op %d error: %d\n", c, type, 632 err); 633 p9_free_req(c, req); 634 return ERR_PTR(err); 635} 636 637static struct p9_fid *p9_fid_create(struct p9_client *clnt) 638{ 639 int ret; 640 struct p9_fid *fid; 641 unsigned long flags; 642 643 P9_DPRINTK(P9_DEBUG_FID, "clnt %p\n", clnt); 644 fid = kmalloc(sizeof(struct p9_fid), GFP_KERNEL); 645 if (!fid) 646 return ERR_PTR(-ENOMEM); 647 648 ret = p9_idpool_get(clnt->fidpool); 649 if (ret < 0) { 650 ret = -ENOSPC; 651 goto error; 652 } 653 fid->fid = ret; 654 655 memset(&fid->qid, 0, sizeof(struct p9_qid)); 656 fid->mode = -1; 657 fid->uid = current_fsuid(); 658 fid->clnt = clnt; 659 fid->rdir = NULL; 660 spin_lock_irqsave(&clnt->lock, flags); 661 list_add(&fid->flist, &clnt->fidlist); 662 spin_unlock_irqrestore(&clnt->lock, flags); 663 664 return fid; 665 666error: 667 kfree(fid); 668 return ERR_PTR(ret); 669} 670 671static void p9_fid_destroy(struct p9_fid *fid) 672{ 673 struct p9_client *clnt; 674 unsigned long flags; 675 676 P9_DPRINTK(P9_DEBUG_FID, "fid %d\n", fid->fid); 677 clnt = fid->clnt; 678 p9_idpool_put(fid->fid, clnt->fidpool); 679 spin_lock_irqsave(&clnt->lock, flags); 680 list_del(&fid->flist); 681 spin_unlock_irqrestore(&clnt->lock, flags); 682 kfree(fid->rdir); 683 kfree(fid); 684} 685 686static int p9_client_version(struct p9_client *c) 687{ 688 int err = 0; 689 struct p9_req_t *req; 690 char *version; 691 int msize; 692 693 P9_DPRINTK(P9_DEBUG_9P, ">>> TVERSION msize %d protocol %d\n", 694 c->msize, c->proto_version); 695 696 switch (c->proto_version) { 697 case p9_proto_2000L: 698 req = p9_client_rpc(c, P9_TVERSION, "ds", 699 c->msize, "9P2000.L"); 700 break; 701 case p9_proto_2000u: 702 req = p9_client_rpc(c, P9_TVERSION, "ds", 703 c->msize, "9P2000.u"); 704 break; 705 case p9_proto_legacy: 706 req = p9_client_rpc(c, P9_TVERSION, "ds", 707 c->msize, "9P2000"); 708 break; 709 default: 710 return -EINVAL; 711 break; 712 } 713 714 if (IS_ERR(req)) 715 return PTR_ERR(req); 716 717 err = p9pdu_readf(req->rc, c->proto_version, "ds", &msize, &version); 718 if (err) { 719 P9_DPRINTK(P9_DEBUG_9P, "version error %d\n", err); 720 p9pdu_dump(1, req->rc); 721 goto error; 722 } 723 724 P9_DPRINTK(P9_DEBUG_9P, "<<< RVERSION msize %d %s\n", msize, version); 725 if (!strncmp(version, "9P2000.L", 8)) 726 c->proto_version = p9_proto_2000L; 727 else if (!strncmp(version, "9P2000.u", 8)) 728 c->proto_version = p9_proto_2000u; 729 else if (!strncmp(version, "9P2000", 6)) 730 c->proto_version = p9_proto_legacy; 731 else { 732 err = -EREMOTEIO; 733 goto error; 734 } 735 736 if (msize < c->msize) 737 c->msize = msize; 738 739error: 740 kfree(version); 741 p9_free_req(c, req); 742 743 return err; 744} 745 746struct p9_client *p9_client_create(const char *dev_name, char *options) 747{ 748 int err; 749 struct p9_client *clnt; 750 751 err = 0; 752 clnt = kmalloc(sizeof(struct p9_client), GFP_KERNEL); 753 if (!clnt) 754 return ERR_PTR(-ENOMEM); 755 756 clnt->trans_mod = NULL; 757 clnt->trans = NULL; 758 spin_lock_init(&clnt->lock); 759 INIT_LIST_HEAD(&clnt->fidlist); 760 761 p9_tag_init(clnt); 762 763 err = parse_opts(options, clnt); 764 if (err < 0) 765 goto free_client; 766 767 if (!clnt->trans_mod) 768 clnt->trans_mod = v9fs_get_default_trans(); 769 770 if (clnt->trans_mod == NULL) { 771 err = -EPROTONOSUPPORT; 772 P9_DPRINTK(P9_DEBUG_ERROR, 773 "No transport defined or default transport\n"); 774 goto free_client; 775 } 776 777 clnt->fidpool = p9_idpool_create(); 778 if (IS_ERR(clnt->fidpool)) { 779 err = PTR_ERR(clnt->fidpool); 780 clnt->fidpool = NULL; 781 goto put_trans; 782 } 783 784 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p trans %p msize %d protocol %d\n", 785 clnt, clnt->trans_mod, clnt->msize, clnt->proto_version); 786 787 err = clnt->trans_mod->create(clnt, dev_name, options); 788 if (err) 789 goto destroy_fidpool; 790 791 if ((clnt->msize+P9_IOHDRSZ) > clnt->trans_mod->maxsize) 792 clnt->msize = clnt->trans_mod->maxsize-P9_IOHDRSZ; 793 794 err = p9_client_version(clnt); 795 if (err) 796 goto close_trans; 797 798 return clnt; 799 800close_trans: 801 clnt->trans_mod->close(clnt); 802destroy_fidpool: 803 p9_idpool_destroy(clnt->fidpool); 804put_trans: 805 v9fs_put_trans(clnt->trans_mod); 806free_client: 807 kfree(clnt); 808 return ERR_PTR(err); 809} 810EXPORT_SYMBOL(p9_client_create); 811 812void p9_client_destroy(struct p9_client *clnt) 813{ 814 struct p9_fid *fid, *fidptr; 815 816 P9_DPRINTK(P9_DEBUG_MUX, "clnt %p\n", clnt); 817 818 if (clnt->trans_mod) 819 clnt->trans_mod->close(clnt); 820 821 v9fs_put_trans(clnt->trans_mod); 822 823 list_for_each_entry_safe(fid, fidptr, &clnt->fidlist, flist) { 824 printk(KERN_INFO "Found fid %d not clunked\n", fid->fid); 825 p9_fid_destroy(fid); 826 } 827 828 if (clnt->fidpool) 829 p9_idpool_destroy(clnt->fidpool); 830 831 p9_tag_cleanup(clnt); 832 833 kfree(clnt); 834} 835EXPORT_SYMBOL(p9_client_destroy); 836 837void p9_client_disconnect(struct p9_client *clnt) 838{ 839 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 840 clnt->status = Disconnected; 841} 842EXPORT_SYMBOL(p9_client_disconnect); 843 844void p9_client_begin_disconnect(struct p9_client *clnt) 845{ 846 P9_DPRINTK(P9_DEBUG_9P, "clnt %p\n", clnt); 847 clnt->status = BeginDisconnect; 848} 849EXPORT_SYMBOL(p9_client_begin_disconnect); 850 851struct p9_fid *p9_client_attach(struct p9_client *clnt, struct p9_fid *afid, 852 char *uname, u32 n_uname, char *aname) 853{ 854 int err; 855 struct p9_req_t *req; 856 struct p9_fid *fid; 857 struct p9_qid qid; 858 859 P9_DPRINTK(P9_DEBUG_9P, ">>> TATTACH afid %d uname %s aname %s\n", 860 afid ? afid->fid : -1, uname, aname); 861 err = 0; 862 863 fid = p9_fid_create(clnt); 864 if (IS_ERR(fid)) { 865 err = PTR_ERR(fid); 866 fid = NULL; 867 goto error; 868 } 869 870 req = p9_client_rpc(clnt, P9_TATTACH, "ddss?d", fid->fid, 871 afid ? afid->fid : P9_NOFID, uname, aname, n_uname); 872 if (IS_ERR(req)) { 873 err = PTR_ERR(req); 874 goto error; 875 } 876 877 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", &qid); 878 if (err) { 879 p9pdu_dump(1, req->rc); 880 p9_free_req(clnt, req); 881 goto error; 882 } 883 884 P9_DPRINTK(P9_DEBUG_9P, "<<< RATTACH qid %x.%llx.%x\n", 885 qid.type, 886 (unsigned long long)qid.path, 887 qid.version); 888 889 memmove(&fid->qid, &qid, sizeof(struct p9_qid)); 890 891 p9_free_req(clnt, req); 892 return fid; 893 894error: 895 if (fid) 896 p9_fid_destroy(fid); 897 return ERR_PTR(err); 898} 899EXPORT_SYMBOL(p9_client_attach); 900 901struct p9_fid *p9_client_walk(struct p9_fid *oldfid, int nwname, char **wnames, 902 int clone) 903{ 904 int err; 905 struct p9_client *clnt; 906 struct p9_fid *fid; 907 struct p9_qid *wqids; 908 struct p9_req_t *req; 909 int16_t nwqids, count; 910 911 err = 0; 912 wqids = NULL; 913 clnt = oldfid->clnt; 914 if (clone) { 915 fid = p9_fid_create(clnt); 916 if (IS_ERR(fid)) { 917 err = PTR_ERR(fid); 918 fid = NULL; 919 goto error; 920 } 921 922 fid->uid = oldfid->uid; 923 } else 924 fid = oldfid; 925 926 927 P9_DPRINTK(P9_DEBUG_9P, ">>> TWALK fids %d,%d nwname %d wname[0] %s\n", 928 oldfid->fid, fid->fid, nwname, wnames ? wnames[0] : NULL); 929 930 req = p9_client_rpc(clnt, P9_TWALK, "ddT", oldfid->fid, fid->fid, 931 nwname, wnames); 932 if (IS_ERR(req)) { 933 err = PTR_ERR(req); 934 goto error; 935 } 936 937 err = p9pdu_readf(req->rc, clnt->proto_version, "R", &nwqids, &wqids); 938 if (err) { 939 p9pdu_dump(1, req->rc); 940 p9_free_req(clnt, req); 941 goto clunk_fid; 942 } 943 p9_free_req(clnt, req); 944 945 P9_DPRINTK(P9_DEBUG_9P, "<<< RWALK nwqid %d:\n", nwqids); 946 947 if (nwqids != nwname) { 948 err = -ENOENT; 949 goto clunk_fid; 950 } 951 952 for (count = 0; count < nwqids; count++) 953 P9_DPRINTK(P9_DEBUG_9P, "<<< [%d] %x.%llx.%x\n", 954 count, wqids[count].type, 955 (unsigned long long)wqids[count].path, 956 wqids[count].version); 957 958 if (nwname) 959 memmove(&fid->qid, &wqids[nwqids - 1], sizeof(struct p9_qid)); 960 else 961 fid->qid = oldfid->qid; 962 963 kfree(wqids); 964 return fid; 965 966clunk_fid: 967 kfree(wqids); 968 p9_client_clunk(fid); 969 fid = NULL; 970 971error: 972 if (fid && (fid != oldfid)) 973 p9_fid_destroy(fid); 974 975 return ERR_PTR(err); 976} 977EXPORT_SYMBOL(p9_client_walk); 978 979int p9_client_open(struct p9_fid *fid, int mode) 980{ 981 int err; 982 struct p9_client *clnt; 983 struct p9_req_t *req; 984 struct p9_qid qid; 985 int iounit; 986 987 clnt = fid->clnt; 988 P9_DPRINTK(P9_DEBUG_9P, ">>> %s fid %d mode %d\n", 989 p9_is_proto_dotl(clnt) ? "TLOPEN" : "TOPEN", fid->fid, mode); 990 err = 0; 991 992 if (fid->mode != -1) 993 return -EINVAL; 994 995 if (p9_is_proto_dotl(clnt)) 996 req = p9_client_rpc(clnt, P9_TLOPEN, "dd", fid->fid, mode); 997 else 998 req = p9_client_rpc(clnt, P9_TOPEN, "db", fid->fid, mode); 999 if (IS_ERR(req)) { 1000 err = PTR_ERR(req); 1001 goto error; 1002 } 1003 1004 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1005 if (err) { 1006 p9pdu_dump(1, req->rc); 1007 goto free_and_error; 1008 } 1009 1010 P9_DPRINTK(P9_DEBUG_9P, "<<< %s qid %x.%llx.%x iounit %x\n", 1011 p9_is_proto_dotl(clnt) ? "RLOPEN" : "ROPEN", qid.type, 1012 (unsigned long long)qid.path, qid.version, iounit); 1013 1014 fid->mode = mode; 1015 fid->iounit = iounit; 1016 1017free_and_error: 1018 p9_free_req(clnt, req); 1019error: 1020 return err; 1021} 1022EXPORT_SYMBOL(p9_client_open); 1023 1024int p9_client_create_dotl(struct p9_fid *ofid, char *name, u32 flags, u32 mode, 1025 gid_t gid, struct p9_qid *qid) 1026{ 1027 int err = 0; 1028 struct p9_client *clnt; 1029 struct p9_req_t *req; 1030 int iounit; 1031 1032 P9_DPRINTK(P9_DEBUG_9P, 1033 ">>> TLCREATE fid %d name %s flags %d mode %d gid %d\n", 1034 ofid->fid, name, flags, mode, gid); 1035 clnt = ofid->clnt; 1036 1037 if (ofid->mode != -1) 1038 return -EINVAL; 1039 1040 req = p9_client_rpc(clnt, P9_TLCREATE, "dsddd", ofid->fid, name, flags, 1041 mode, gid); 1042 if (IS_ERR(req)) { 1043 err = PTR_ERR(req); 1044 goto error; 1045 } 1046 1047 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", qid, &iounit); 1048 if (err) { 1049 p9pdu_dump(1, req->rc); 1050 goto free_and_error; 1051 } 1052 1053 P9_DPRINTK(P9_DEBUG_9P, "<<< RLCREATE qid %x.%llx.%x iounit %x\n", 1054 qid->type, 1055 (unsigned long long)qid->path, 1056 qid->version, iounit); 1057 1058 ofid->mode = mode; 1059 ofid->iounit = iounit; 1060 1061free_and_error: 1062 p9_free_req(clnt, req); 1063error: 1064 return err; 1065} 1066EXPORT_SYMBOL(p9_client_create_dotl); 1067 1068int p9_client_fcreate(struct p9_fid *fid, char *name, u32 perm, int mode, 1069 char *extension) 1070{ 1071 int err; 1072 struct p9_client *clnt; 1073 struct p9_req_t *req; 1074 struct p9_qid qid; 1075 int iounit; 1076 1077 P9_DPRINTK(P9_DEBUG_9P, ">>> TCREATE fid %d name %s perm %d mode %d\n", 1078 fid->fid, name, perm, mode); 1079 err = 0; 1080 clnt = fid->clnt; 1081 1082 if (fid->mode != -1) 1083 return -EINVAL; 1084 1085 req = p9_client_rpc(clnt, P9_TCREATE, "dsdb?s", fid->fid, name, perm, 1086 mode, extension); 1087 if (IS_ERR(req)) { 1088 err = PTR_ERR(req); 1089 goto error; 1090 } 1091 1092 err = p9pdu_readf(req->rc, clnt->proto_version, "Qd", &qid, &iounit); 1093 if (err) { 1094 p9pdu_dump(1, req->rc); 1095 goto free_and_error; 1096 } 1097 1098 P9_DPRINTK(P9_DEBUG_9P, "<<< RCREATE qid %x.%llx.%x iounit %x\n", 1099 qid.type, 1100 (unsigned long long)qid.path, 1101 qid.version, iounit); 1102 1103 fid->mode = mode; 1104 fid->iounit = iounit; 1105 1106free_and_error: 1107 p9_free_req(clnt, req); 1108error: 1109 return err; 1110} 1111EXPORT_SYMBOL(p9_client_fcreate); 1112 1113int p9_client_symlink(struct p9_fid *dfid, char *name, char *symtgt, gid_t gid, 1114 struct p9_qid *qid) 1115{ 1116 int err = 0; 1117 struct p9_client *clnt; 1118 struct p9_req_t *req; 1119 1120 P9_DPRINTK(P9_DEBUG_9P, ">>> TSYMLINK dfid %d name %s symtgt %s\n", 1121 dfid->fid, name, symtgt); 1122 clnt = dfid->clnt; 1123 1124 req = p9_client_rpc(clnt, P9_TSYMLINK, "dssd", dfid->fid, name, symtgt, 1125 gid); 1126 if (IS_ERR(req)) { 1127 err = PTR_ERR(req); 1128 goto error; 1129 } 1130 1131 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1132 if (err) { 1133 p9pdu_dump(1, req->rc); 1134 goto free_and_error; 1135 } 1136 1137 P9_DPRINTK(P9_DEBUG_9P, "<<< RSYMLINK qid %x.%llx.%x\n", 1138 qid->type, (unsigned long long)qid->path, qid->version); 1139 1140free_and_error: 1141 p9_free_req(clnt, req); 1142error: 1143 return err; 1144} 1145EXPORT_SYMBOL(p9_client_symlink); 1146 1147int p9_client_link(struct p9_fid *dfid, struct p9_fid *oldfid, char *newname) 1148{ 1149 struct p9_client *clnt; 1150 struct p9_req_t *req; 1151 1152 P9_DPRINTK(P9_DEBUG_9P, ">>> TLINK dfid %d oldfid %d newname %s\n", 1153 dfid->fid, oldfid->fid, newname); 1154 clnt = dfid->clnt; 1155 req = p9_client_rpc(clnt, P9_TLINK, "dds", dfid->fid, oldfid->fid, 1156 newname); 1157 if (IS_ERR(req)) 1158 return PTR_ERR(req); 1159 1160 P9_DPRINTK(P9_DEBUG_9P, "<<< RLINK\n"); 1161 p9_free_req(clnt, req); 1162 return 0; 1163} 1164EXPORT_SYMBOL(p9_client_link); 1165 1166int p9_client_fsync(struct p9_fid *fid) 1167{ 1168 int err; 1169 struct p9_client *clnt; 1170 struct p9_req_t *req; 1171 1172 P9_DPRINTK(P9_DEBUG_9P, ">>> TFSYNC fid %d\n", fid->fid); 1173 err = 0; 1174 clnt = fid->clnt; 1175 1176 req = p9_client_rpc(clnt, P9_TFSYNC, "d", fid->fid); 1177 if (IS_ERR(req)) { 1178 err = PTR_ERR(req); 1179 goto error; 1180 } 1181 1182 P9_DPRINTK(P9_DEBUG_9P, "<<< RFSYNC fid %d\n", fid->fid); 1183 1184 p9_free_req(clnt, req); 1185 1186error: 1187 return err; 1188} 1189EXPORT_SYMBOL(p9_client_fsync); 1190 1191int p9_client_clunk(struct p9_fid *fid) 1192{ 1193 int err; 1194 struct p9_client *clnt; 1195 struct p9_req_t *req; 1196 1197 if (!fid) { 1198 P9_EPRINTK(KERN_WARNING, "Trying to clunk with NULL fid\n"); 1199 dump_stack(); 1200 return 0; 1201 } 1202 1203 P9_DPRINTK(P9_DEBUG_9P, ">>> TCLUNK fid %d\n", fid->fid); 1204 err = 0; 1205 clnt = fid->clnt; 1206 1207 req = p9_client_rpc(clnt, P9_TCLUNK, "d", fid->fid); 1208 if (IS_ERR(req)) { 1209 err = PTR_ERR(req); 1210 goto error; 1211 } 1212 1213 P9_DPRINTK(P9_DEBUG_9P, "<<< RCLUNK fid %d\n", fid->fid); 1214 1215 p9_free_req(clnt, req); 1216 p9_fid_destroy(fid); 1217 1218error: 1219 return err; 1220} 1221EXPORT_SYMBOL(p9_client_clunk); 1222 1223int p9_client_remove(struct p9_fid *fid) 1224{ 1225 int err; 1226 struct p9_client *clnt; 1227 struct p9_req_t *req; 1228 1229 P9_DPRINTK(P9_DEBUG_9P, ">>> TREMOVE fid %d\n", fid->fid); 1230 err = 0; 1231 clnt = fid->clnt; 1232 1233 req = p9_client_rpc(clnt, P9_TREMOVE, "d", fid->fid); 1234 if (IS_ERR(req)) { 1235 err = PTR_ERR(req); 1236 goto error; 1237 } 1238 1239 P9_DPRINTK(P9_DEBUG_9P, "<<< RREMOVE fid %d\n", fid->fid); 1240 1241 p9_free_req(clnt, req); 1242error: 1243 p9_fid_destroy(fid); 1244 return err; 1245} 1246EXPORT_SYMBOL(p9_client_remove); 1247 1248int 1249p9_client_read(struct p9_fid *fid, char *data, char __user *udata, u64 offset, 1250 u32 count) 1251{ 1252 int err, rsize, total; 1253 struct p9_client *clnt; 1254 struct p9_req_t *req; 1255 char *dataptr; 1256 1257 P9_DPRINTK(P9_DEBUG_9P, ">>> TREAD fid %d offset %llu %d\n", fid->fid, 1258 (long long unsigned) offset, count); 1259 err = 0; 1260 clnt = fid->clnt; 1261 total = 0; 1262 1263 rsize = fid->iounit; 1264 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1265 rsize = clnt->msize - P9_IOHDRSZ; 1266 1267 if (count < rsize) 1268 rsize = count; 1269 1270 req = p9_client_rpc(clnt, P9_TREAD, "dqd", fid->fid, offset, rsize); 1271 if (IS_ERR(req)) { 1272 err = PTR_ERR(req); 1273 goto error; 1274 } 1275 1276 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1277 if (err) { 1278 p9pdu_dump(1, req->rc); 1279 goto free_and_error; 1280 } 1281 1282 P9_DPRINTK(P9_DEBUG_9P, "<<< RREAD count %d\n", count); 1283 1284 if (data) { 1285 memmove(data, dataptr, count); 1286 } 1287 1288 if (udata) { 1289 err = copy_to_user(udata, dataptr, count); 1290 if (err) { 1291 err = -EFAULT; 1292 goto free_and_error; 1293 } 1294 } 1295 1296 p9_free_req(clnt, req); 1297 return count; 1298 1299free_and_error: 1300 p9_free_req(clnt, req); 1301error: 1302 return err; 1303} 1304EXPORT_SYMBOL(p9_client_read); 1305 1306int 1307p9_client_write(struct p9_fid *fid, char *data, const char __user *udata, 1308 u64 offset, u32 count) 1309{ 1310 int err, rsize, total; 1311 struct p9_client *clnt; 1312 struct p9_req_t *req; 1313 1314 P9_DPRINTK(P9_DEBUG_9P, ">>> TWRITE fid %d offset %llu count %d\n", 1315 fid->fid, (long long unsigned) offset, count); 1316 err = 0; 1317 clnt = fid->clnt; 1318 total = 0; 1319 1320 rsize = fid->iounit; 1321 if (!rsize || rsize > clnt->msize-P9_IOHDRSZ) 1322 rsize = clnt->msize - P9_IOHDRSZ; 1323 1324 if (count < rsize) 1325 rsize = count; 1326 if (data) 1327 req = p9_client_rpc(clnt, P9_TWRITE, "dqD", fid->fid, offset, 1328 rsize, data); 1329 else 1330 req = p9_client_rpc(clnt, P9_TWRITE, "dqU", fid->fid, offset, 1331 rsize, udata); 1332 if (IS_ERR(req)) { 1333 err = PTR_ERR(req); 1334 goto error; 1335 } 1336 1337 err = p9pdu_readf(req->rc, clnt->proto_version, "d", &count); 1338 if (err) { 1339 p9pdu_dump(1, req->rc); 1340 goto free_and_error; 1341 } 1342 1343 P9_DPRINTK(P9_DEBUG_9P, "<<< RWRITE count %d\n", count); 1344 1345 p9_free_req(clnt, req); 1346 return count; 1347 1348free_and_error: 1349 p9_free_req(clnt, req); 1350error: 1351 return err; 1352} 1353EXPORT_SYMBOL(p9_client_write); 1354 1355struct p9_wstat *p9_client_stat(struct p9_fid *fid) 1356{ 1357 int err; 1358 struct p9_client *clnt; 1359 struct p9_wstat *ret = kmalloc(sizeof(struct p9_wstat), GFP_KERNEL); 1360 struct p9_req_t *req; 1361 u16 ignored; 1362 1363 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTAT fid %d\n", fid->fid); 1364 1365 if (!ret) 1366 return ERR_PTR(-ENOMEM); 1367 1368 err = 0; 1369 clnt = fid->clnt; 1370 1371 req = p9_client_rpc(clnt, P9_TSTAT, "d", fid->fid); 1372 if (IS_ERR(req)) { 1373 err = PTR_ERR(req); 1374 goto error; 1375 } 1376 1377 err = p9pdu_readf(req->rc, clnt->proto_version, "wS", &ignored, ret); 1378 if (err) { 1379 p9pdu_dump(1, req->rc); 1380 p9_free_req(clnt, req); 1381 goto error; 1382 } 1383 1384 P9_DPRINTK(P9_DEBUG_9P, 1385 "<<< RSTAT sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1386 "<<< mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1387 "<<< name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1388 "<<< uid=%d gid=%d n_muid=%d\n", 1389 ret->size, ret->type, ret->dev, ret->qid.type, 1390 (unsigned long long)ret->qid.path, ret->qid.version, ret->mode, 1391 ret->atime, ret->mtime, (unsigned long long)ret->length, 1392 ret->name, ret->uid, ret->gid, ret->muid, ret->extension, 1393 ret->n_uid, ret->n_gid, ret->n_muid); 1394 1395 p9_free_req(clnt, req); 1396 return ret; 1397 1398error: 1399 kfree(ret); 1400 return ERR_PTR(err); 1401} 1402EXPORT_SYMBOL(p9_client_stat); 1403 1404struct p9_stat_dotl *p9_client_getattr_dotl(struct p9_fid *fid, 1405 u64 request_mask) 1406{ 1407 int err; 1408 struct p9_client *clnt; 1409 struct p9_stat_dotl *ret = kmalloc(sizeof(struct p9_stat_dotl), 1410 GFP_KERNEL); 1411 struct p9_req_t *req; 1412 1413 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETATTR fid %d, request_mask %lld\n", 1414 fid->fid, request_mask); 1415 1416 if (!ret) 1417 return ERR_PTR(-ENOMEM); 1418 1419 err = 0; 1420 clnt = fid->clnt; 1421 1422 req = p9_client_rpc(clnt, P9_TGETATTR, "dq", fid->fid, request_mask); 1423 if (IS_ERR(req)) { 1424 err = PTR_ERR(req); 1425 goto error; 1426 } 1427 1428 err = p9pdu_readf(req->rc, clnt->proto_version, "A", ret); 1429 if (err) { 1430 p9pdu_dump(1, req->rc); 1431 p9_free_req(clnt, req); 1432 goto error; 1433 } 1434 1435 P9_DPRINTK(P9_DEBUG_9P, 1436 "<<< RGETATTR st_result_mask=%lld\n" 1437 "<<< qid=%x.%llx.%x\n" 1438 "<<< st_mode=%8.8x st_nlink=%llu\n" 1439 "<<< st_uid=%d st_gid=%d\n" 1440 "<<< st_rdev=%llx st_size=%llx st_blksize=%llu st_blocks=%llu\n" 1441 "<<< st_atime_sec=%lld st_atime_nsec=%lld\n" 1442 "<<< st_mtime_sec=%lld st_mtime_nsec=%lld\n" 1443 "<<< st_ctime_sec=%lld st_ctime_nsec=%lld\n" 1444 "<<< st_btime_sec=%lld st_btime_nsec=%lld\n" 1445 "<<< st_gen=%lld st_data_version=%lld", 1446 ret->st_result_mask, ret->qid.type, ret->qid.path, 1447 ret->qid.version, ret->st_mode, ret->st_nlink, ret->st_uid, 1448 ret->st_gid, ret->st_rdev, ret->st_size, ret->st_blksize, 1449 ret->st_blocks, ret->st_atime_sec, ret->st_atime_nsec, 1450 ret->st_mtime_sec, ret->st_mtime_nsec, ret->st_ctime_sec, 1451 ret->st_ctime_nsec, ret->st_btime_sec, ret->st_btime_nsec, 1452 ret->st_gen, ret->st_data_version); 1453 1454 p9_free_req(clnt, req); 1455 return ret; 1456 1457error: 1458 kfree(ret); 1459 return ERR_PTR(err); 1460} 1461EXPORT_SYMBOL(p9_client_getattr_dotl); 1462 1463static int p9_client_statsize(struct p9_wstat *wst, int proto_version) 1464{ 1465 int ret; 1466 1467 /* NOTE: size shouldn't include its own length */ 1468 /* size[2] type[2] dev[4] qid[13] */ 1469 /* mode[4] atime[4] mtime[4] length[8]*/ 1470 /* name[s] uid[s] gid[s] muid[s] */ 1471 ret = 2+4+13+4+4+4+8+2+2+2+2; 1472 1473 if (wst->name) 1474 ret += strlen(wst->name); 1475 if (wst->uid) 1476 ret += strlen(wst->uid); 1477 if (wst->gid) 1478 ret += strlen(wst->gid); 1479 if (wst->muid) 1480 ret += strlen(wst->muid); 1481 1482 if ((proto_version == p9_proto_2000u) || 1483 (proto_version == p9_proto_2000L)) { 1484 ret += 2+4+4+4; /* extension[s] n_uid[4] n_gid[4] n_muid[4] */ 1485 if (wst->extension) 1486 ret += strlen(wst->extension); 1487 } 1488 1489 return ret; 1490} 1491 1492int p9_client_wstat(struct p9_fid *fid, struct p9_wstat *wst) 1493{ 1494 int err; 1495 struct p9_req_t *req; 1496 struct p9_client *clnt; 1497 1498 err = 0; 1499 clnt = fid->clnt; 1500 wst->size = p9_client_statsize(wst, clnt->proto_version); 1501 P9_DPRINTK(P9_DEBUG_9P, ">>> TWSTAT fid %d\n", fid->fid); 1502 P9_DPRINTK(P9_DEBUG_9P, 1503 " sz=%x type=%x dev=%x qid=%x.%llx.%x\n" 1504 " mode=%8.8x atime=%8.8x mtime=%8.8x length=%llx\n" 1505 " name=%s uid=%s gid=%s muid=%s extension=(%s)\n" 1506 " uid=%d gid=%d n_muid=%d\n", 1507 wst->size, wst->type, wst->dev, wst->qid.type, 1508 (unsigned long long)wst->qid.path, wst->qid.version, wst->mode, 1509 wst->atime, wst->mtime, (unsigned long long)wst->length, 1510 wst->name, wst->uid, wst->gid, wst->muid, wst->extension, 1511 wst->n_uid, wst->n_gid, wst->n_muid); 1512 1513 req = p9_client_rpc(clnt, P9_TWSTAT, "dwS", fid->fid, wst->size+2, wst); 1514 if (IS_ERR(req)) { 1515 err = PTR_ERR(req); 1516 goto error; 1517 } 1518 1519 P9_DPRINTK(P9_DEBUG_9P, "<<< RWSTAT fid %d\n", fid->fid); 1520 1521 p9_free_req(clnt, req); 1522error: 1523 return err; 1524} 1525EXPORT_SYMBOL(p9_client_wstat); 1526 1527int p9_client_setattr(struct p9_fid *fid, struct p9_iattr_dotl *p9attr) 1528{ 1529 int err; 1530 struct p9_req_t *req; 1531 struct p9_client *clnt; 1532 1533 err = 0; 1534 clnt = fid->clnt; 1535 P9_DPRINTK(P9_DEBUG_9P, ">>> TSETATTR fid %d\n", fid->fid); 1536 P9_DPRINTK(P9_DEBUG_9P, 1537 " valid=%x mode=%x uid=%d gid=%d size=%lld\n" 1538 " atime_sec=%lld atime_nsec=%lld\n" 1539 " mtime_sec=%lld mtime_nsec=%lld\n", 1540 p9attr->valid, p9attr->mode, p9attr->uid, p9attr->gid, 1541 p9attr->size, p9attr->atime_sec, p9attr->atime_nsec, 1542 p9attr->mtime_sec, p9attr->mtime_nsec); 1543 1544 req = p9_client_rpc(clnt, P9_TSETATTR, "dI", fid->fid, p9attr); 1545 1546 if (IS_ERR(req)) { 1547 err = PTR_ERR(req); 1548 goto error; 1549 } 1550 P9_DPRINTK(P9_DEBUG_9P, "<<< RSETATTR fid %d\n", fid->fid); 1551 p9_free_req(clnt, req); 1552error: 1553 return err; 1554} 1555EXPORT_SYMBOL(p9_client_setattr); 1556 1557int p9_client_statfs(struct p9_fid *fid, struct p9_rstatfs *sb) 1558{ 1559 int err; 1560 struct p9_req_t *req; 1561 struct p9_client *clnt; 1562 1563 err = 0; 1564 clnt = fid->clnt; 1565 1566 P9_DPRINTK(P9_DEBUG_9P, ">>> TSTATFS fid %d\n", fid->fid); 1567 1568 req = p9_client_rpc(clnt, P9_TSTATFS, "d", fid->fid); 1569 if (IS_ERR(req)) { 1570 err = PTR_ERR(req); 1571 goto error; 1572 } 1573 1574 err = p9pdu_readf(req->rc, clnt->proto_version, "ddqqqqqqd", &sb->type, 1575 &sb->bsize, &sb->blocks, &sb->bfree, &sb->bavail, 1576 &sb->files, &sb->ffree, &sb->fsid, &sb->namelen); 1577 if (err) { 1578 p9pdu_dump(1, req->rc); 1579 p9_free_req(clnt, req); 1580 goto error; 1581 } 1582 1583 P9_DPRINTK(P9_DEBUG_9P, "<<< RSTATFS fid %d type 0x%lx bsize %ld " 1584 "blocks %llu bfree %llu bavail %llu files %llu ffree %llu " 1585 "fsid %llu namelen %ld\n", 1586 fid->fid, (long unsigned int)sb->type, (long int)sb->bsize, 1587 sb->blocks, sb->bfree, sb->bavail, sb->files, sb->ffree, 1588 sb->fsid, (long int)sb->namelen); 1589 1590 p9_free_req(clnt, req); 1591error: 1592 return err; 1593} 1594EXPORT_SYMBOL(p9_client_statfs); 1595 1596int p9_client_rename(struct p9_fid *fid, struct p9_fid *newdirfid, char *name) 1597{ 1598 int err; 1599 struct p9_req_t *req; 1600 struct p9_client *clnt; 1601 1602 err = 0; 1603 clnt = fid->clnt; 1604 1605 P9_DPRINTK(P9_DEBUG_9P, ">>> TRENAME fid %d newdirfid %d name %s\n", 1606 fid->fid, newdirfid->fid, name); 1607 1608 req = p9_client_rpc(clnt, P9_TRENAME, "dds", fid->fid, 1609 newdirfid->fid, name); 1610 if (IS_ERR(req)) { 1611 err = PTR_ERR(req); 1612 goto error; 1613 } 1614 1615 P9_DPRINTK(P9_DEBUG_9P, "<<< RRENAME fid %d\n", fid->fid); 1616 1617 p9_free_req(clnt, req); 1618error: 1619 return err; 1620} 1621EXPORT_SYMBOL(p9_client_rename); 1622 1623/* 1624 * An xattrwalk without @attr_name gives the fid for the lisxattr namespace 1625 */ 1626struct p9_fid *p9_client_xattrwalk(struct p9_fid *file_fid, 1627 const char *attr_name, u64 *attr_size) 1628{ 1629 int err; 1630 struct p9_req_t *req; 1631 struct p9_client *clnt; 1632 struct p9_fid *attr_fid; 1633 1634 err = 0; 1635 clnt = file_fid->clnt; 1636 attr_fid = p9_fid_create(clnt); 1637 if (IS_ERR(attr_fid)) { 1638 err = PTR_ERR(attr_fid); 1639 attr_fid = NULL; 1640 goto error; 1641 } 1642 P9_DPRINTK(P9_DEBUG_9P, 1643 ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n", 1644 file_fid->fid, attr_fid->fid, attr_name); 1645 1646 req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds", 1647 file_fid->fid, attr_fid->fid, attr_name); 1648 if (IS_ERR(req)) { 1649 err = PTR_ERR(req); 1650 goto error; 1651 } 1652 err = p9pdu_readf(req->rc, clnt->proto_version, "q", attr_size); 1653 if (err) { 1654 p9pdu_dump(1, req->rc); 1655 p9_free_req(clnt, req); 1656 goto clunk_fid; 1657 } 1658 p9_free_req(clnt, req); 1659 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRWALK fid %d size %llu\n", 1660 attr_fid->fid, *attr_size); 1661 return attr_fid; 1662clunk_fid: 1663 p9_client_clunk(attr_fid); 1664 attr_fid = NULL; 1665error: 1666 if (attr_fid && (attr_fid != file_fid)) 1667 p9_fid_destroy(attr_fid); 1668 1669 return ERR_PTR(err); 1670} 1671EXPORT_SYMBOL_GPL(p9_client_xattrwalk); 1672 1673int p9_client_xattrcreate(struct p9_fid *fid, const char *name, 1674 u64 attr_size, int flags) 1675{ 1676 int err; 1677 struct p9_req_t *req; 1678 struct p9_client *clnt; 1679 1680 P9_DPRINTK(P9_DEBUG_9P, 1681 ">>> TXATTRCREATE fid %d name %s size %lld flag %d\n", 1682 fid->fid, name, (long long)attr_size, flags); 1683 err = 0; 1684 clnt = fid->clnt; 1685 req = p9_client_rpc(clnt, P9_TXATTRCREATE, "dsqd", 1686 fid->fid, name, attr_size, flags); 1687 if (IS_ERR(req)) { 1688 err = PTR_ERR(req); 1689 goto error; 1690 } 1691 P9_DPRINTK(P9_DEBUG_9P, "<<< RXATTRCREATE fid %d\n", fid->fid); 1692 p9_free_req(clnt, req); 1693error: 1694 return err; 1695} 1696EXPORT_SYMBOL_GPL(p9_client_xattrcreate); 1697 1698int p9_client_readdir(struct p9_fid *fid, char *data, u32 count, u64 offset) 1699{ 1700 int err, rsize, total; 1701 struct p9_client *clnt; 1702 struct p9_req_t *req; 1703 char *dataptr; 1704 1705 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADDIR fid %d offset %llu count %d\n", 1706 fid->fid, (long long unsigned) offset, count); 1707 1708 err = 0; 1709 clnt = fid->clnt; 1710 total = 0; 1711 1712 rsize = fid->iounit; 1713 if (!rsize || rsize > clnt->msize-P9_READDIRHDRSZ) 1714 rsize = clnt->msize - P9_READDIRHDRSZ; 1715 1716 if (count < rsize) 1717 rsize = count; 1718 1719 req = p9_client_rpc(clnt, P9_TREADDIR, "dqd", fid->fid, offset, rsize); 1720 if (IS_ERR(req)) { 1721 err = PTR_ERR(req); 1722 goto error; 1723 } 1724 1725 err = p9pdu_readf(req->rc, clnt->proto_version, "D", &count, &dataptr); 1726 if (err) { 1727 p9pdu_dump(1, req->rc); 1728 goto free_and_error; 1729 } 1730 1731 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADDIR count %d\n", count); 1732 1733 if (data) 1734 memmove(data, dataptr, count); 1735 1736 p9_free_req(clnt, req); 1737 return count; 1738 1739free_and_error: 1740 p9_free_req(clnt, req); 1741error: 1742 return err; 1743} 1744EXPORT_SYMBOL(p9_client_readdir); 1745 1746int p9_client_mknod_dotl(struct p9_fid *fid, char *name, int mode, 1747 dev_t rdev, gid_t gid, struct p9_qid *qid) 1748{ 1749 int err; 1750 struct p9_client *clnt; 1751 struct p9_req_t *req; 1752 1753 err = 0; 1754 clnt = fid->clnt; 1755 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKNOD fid %d name %s mode %d major %d " 1756 "minor %d\n", fid->fid, name, mode, MAJOR(rdev), MINOR(rdev)); 1757 req = p9_client_rpc(clnt, P9_TMKNOD, "dsdddd", fid->fid, name, mode, 1758 MAJOR(rdev), MINOR(rdev), gid); 1759 if (IS_ERR(req)) 1760 return PTR_ERR(req); 1761 1762 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1763 if (err) { 1764 p9pdu_dump(1, req->rc); 1765 goto error; 1766 } 1767 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKNOD qid %x.%llx.%x\n", qid->type, 1768 (unsigned long long)qid->path, qid->version); 1769 1770error: 1771 p9_free_req(clnt, req); 1772 return err; 1773 1774} 1775EXPORT_SYMBOL(p9_client_mknod_dotl); 1776 1777int p9_client_mkdir_dotl(struct p9_fid *fid, char *name, int mode, 1778 gid_t gid, struct p9_qid *qid) 1779{ 1780 int err; 1781 struct p9_client *clnt; 1782 struct p9_req_t *req; 1783 1784 err = 0; 1785 clnt = fid->clnt; 1786 P9_DPRINTK(P9_DEBUG_9P, ">>> TMKDIR fid %d name %s mode %d gid %d\n", 1787 fid->fid, name, mode, gid); 1788 req = p9_client_rpc(clnt, P9_TMKDIR, "dsdd", fid->fid, name, mode, 1789 gid); 1790 if (IS_ERR(req)) 1791 return PTR_ERR(req); 1792 1793 err = p9pdu_readf(req->rc, clnt->proto_version, "Q", qid); 1794 if (err) { 1795 p9pdu_dump(1, req->rc); 1796 goto error; 1797 } 1798 P9_DPRINTK(P9_DEBUG_9P, "<<< RMKDIR qid %x.%llx.%x\n", qid->type, 1799 (unsigned long long)qid->path, qid->version); 1800 1801error: 1802 p9_free_req(clnt, req); 1803 return err; 1804 1805} 1806EXPORT_SYMBOL(p9_client_mkdir_dotl); 1807 1808int p9_client_lock_dotl(struct p9_fid *fid, struct p9_flock *flock, u8 *status) 1809{ 1810 int err; 1811 struct p9_client *clnt; 1812 struct p9_req_t *req; 1813 1814 err = 0; 1815 clnt = fid->clnt; 1816 P9_DPRINTK(P9_DEBUG_9P, ">>> TLOCK fid %d type %i flags %d " 1817 "start %lld length %lld proc_id %d client_id %s\n", 1818 fid->fid, flock->type, flock->flags, flock->start, 1819 flock->length, flock->proc_id, flock->client_id); 1820 1821 req = p9_client_rpc(clnt, P9_TLOCK, "dbdqqds", fid->fid, flock->type, 1822 flock->flags, flock->start, flock->length, 1823 flock->proc_id, flock->client_id); 1824 1825 if (IS_ERR(req)) 1826 return PTR_ERR(req); 1827 1828 err = p9pdu_readf(req->rc, clnt->proto_version, "b", status); 1829 if (err) { 1830 p9pdu_dump(1, req->rc); 1831 goto error; 1832 } 1833 P9_DPRINTK(P9_DEBUG_9P, "<<< RLOCK status %i\n", *status); 1834error: 1835 p9_free_req(clnt, req); 1836 return err; 1837 1838} 1839EXPORT_SYMBOL(p9_client_lock_dotl); 1840 1841int p9_client_getlock_dotl(struct p9_fid *fid, struct p9_getlock *glock) 1842{ 1843 int err; 1844 struct p9_client *clnt; 1845 struct p9_req_t *req; 1846 1847 err = 0; 1848 clnt = fid->clnt; 1849 P9_DPRINTK(P9_DEBUG_9P, ">>> TGETLOCK fid %d, type %i start %lld " 1850 "length %lld proc_id %d client_id %s\n", fid->fid, glock->type, 1851 glock->start, glock->length, glock->proc_id, glock->client_id); 1852 1853 req = p9_client_rpc(clnt, P9_TGETLOCK, "dbqqds", fid->fid, glock->type, 1854 glock->start, glock->length, glock->proc_id, glock->client_id); 1855 1856 if (IS_ERR(req)) 1857 return PTR_ERR(req); 1858 1859 err = p9pdu_readf(req->rc, clnt->proto_version, "bqqds", &glock->type, 1860 &glock->start, &glock->length, &glock->proc_id, 1861 &glock->client_id); 1862 if (err) { 1863 p9pdu_dump(1, req->rc); 1864 goto error; 1865 } 1866 P9_DPRINTK(P9_DEBUG_9P, "<<< RGETLOCK type %i start %lld length %lld " 1867 "proc_id %d client_id %s\n", glock->type, glock->start, 1868 glock->length, glock->proc_id, glock->client_id); 1869error: 1870 p9_free_req(clnt, req); 1871 return err; 1872} 1873EXPORT_SYMBOL(p9_client_getlock_dotl); 1874 1875int p9_client_readlink(struct p9_fid *fid, char **target) 1876{ 1877 int err; 1878 struct p9_client *clnt; 1879 struct p9_req_t *req; 1880 1881 err = 0; 1882 clnt = fid->clnt; 1883 P9_DPRINTK(P9_DEBUG_9P, ">>> TREADLINK fid %d\n", fid->fid); 1884 1885 req = p9_client_rpc(clnt, P9_TREADLINK, "d", fid->fid); 1886 if (IS_ERR(req)) 1887 return PTR_ERR(req); 1888 1889 err = p9pdu_readf(req->rc, clnt->proto_version, "s", target); 1890 if (err) { 1891 p9pdu_dump(1, req->rc); 1892 goto error; 1893 } 1894 P9_DPRINTK(P9_DEBUG_9P, "<<< RREADLINK target %s\n", *target); 1895error: 1896 p9_free_req(clnt, req); 1897 return err; 1898} 1899EXPORT_SYMBOL(p9_client_readlink); 1900