node.c revision 1.3
1 /* $NetBSD: node.c,v 1.3 2007/01/07 19:31:48 pooka Exp $ */ 2 3 /* 4 * Copyright (c) 2006 Antti Kantee. All Rights Reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. The name of the company nor the name of the author may be used to 15 * endorse or promote products derived from this software without specific 16 * prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 19 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 20 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE 21 * DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR 24 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 */ 30 31 #include <sys/cdefs.h> 32 #ifndef lint 33 __RCSID("$NetBSD: node.c,v 1.3 2007/01/07 19:31:48 pooka Exp $"); 34 #endif /* !lint */ 35 36 #include <assert.h> 37 #include <errno.h> 38 #include <stdio.h> 39 #include <stdlib.h> 40 41 #include "psshfs.h" 42 #include "sftp_proto.h" 43 44 int 45 psshfs_node_lookup(struct puffs_cc *pcc, void *opc, void **newnode, 46 enum vtype *newtype, voff_t *newsize, dev_t *newrdev, 47 const struct puffs_cn *pcn) 48 { 49 struct puffs_usermount *pu = puffs_cc_getusermount(pcc); 50 struct psshfs_ctx *pctx = pu->pu_privdata; 51 struct puffs_node *pn_dir = opc; 52 struct psshfs_node *psn_dir = pn_dir->pn_data; 53 struct puffs_node *pn; 54 struct psshfs_dir *pd; 55 int rv; 56 57 if (pcn->pcn_flags & PUFFS_ISDOTDOT) { 58 *newnode = psn_dir->parent; 59 *newtype = VDIR; 60 return 0; 61 } 62 63 rv = sftp_readdir(pcc, pctx, pn_dir); 64 if (rv) { 65 assert(rv != ENOENT); 66 return rv; 67 } 68 69 pd = lookup(psn_dir->dir, psn_dir->dentnext, pcn->pcn_name); 70 if (!pd) 71 return ENOENT; 72 73 if (pd->entry) 74 pn = pd->entry; 75 else 76 pn = makenode(pu, pn_dir, pd, &pd->va); 77 78 *newnode = pn; 79 *newsize = pn->pn_va.va_size; 80 *newtype = pn->pn_va.va_type; 81 82 return 0; 83 } 84 85 int 86 psshfs_node_getattr(struct puffs_cc *pcc, void *opc, struct vattr *vap, 87 const struct puffs_cred *pcr, pid_t pid) 88 { 89 PSSHFSAUTOVAR(pcc); 90 struct puffs_node *pn = opc; 91 struct psshfs_node *psn = pn->pn_data; 92 struct vattr va; 93 94 rv = 0; 95 96 /* XXX: expire by time */ 97 if (!psn->hasvattr) { 98 psbuf_req_str(pb, SSH_FXP_LSTAT, reqid, pn->pn_path); 99 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 100 puffs_cc_yield(pcc); 101 102 rv = psbuf_expect_attrs(pb, &va); 103 if (rv) 104 goto out; 105 106 puffs_setvattr(&pn->pn_va, &va); 107 } 108 109 memcpy(vap, &pn->pn_va, sizeof(struct vattr)); 110 psn->hasvattr = 1; 111 112 out: 113 PSSHFSRETURN(rv); 114 } 115 116 int 117 psshfs_node_setattr(struct puffs_cc *pcc, void *opc, 118 const struct vattr *va, const struct puffs_cred *pcr, pid_t pid) 119 { 120 PSSHFSAUTOVAR(pcc); 121 struct vattr kludgeva; 122 struct puffs_node *pn = opc; 123 124 psbuf_req_str(pb, SSH_FXP_SETSTAT, reqid, pn->pn_path); 125 126 memcpy(&kludgeva, va, sizeof(struct vattr)); 127 128 /* XXX: kludge due to openssh server implementation */ 129 if (va->va_atime.tv_sec != PUFFS_VNOVAL 130 && va->va_mtime.tv_sec == PUFFS_VNOVAL) { 131 if (pn->pn_va.va_mtime.tv_sec != PUFFS_VNOVAL) 132 kludgeva.va_mtime.tv_sec = pn->pn_va.va_mtime.tv_sec; 133 else 134 kludgeva.va_mtime.tv_sec = va->va_atime.tv_sec; 135 } 136 if (va->va_mtime.tv_sec != PUFFS_VNOVAL 137 && va->va_atime.tv_sec == PUFFS_VNOVAL) { 138 if (pn->pn_va.va_atime.tv_sec != PUFFS_VNOVAL) 139 kludgeva.va_atime.tv_sec = pn->pn_va.va_atime.tv_sec; 140 else 141 kludgeva.va_atime.tv_sec = va->va_mtime.tv_sec; 142 } 143 144 psbuf_put_vattr(pb, &kludgeva); 145 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 146 147 puffs_cc_yield(pcc); 148 149 rv = psbuf_expect_status(pb); 150 if (rv == 0) 151 puffs_setvattr(&pn->pn_va, &kludgeva); 152 153 PSSHFSRETURN(rv); 154 } 155 156 int 157 psshfs_node_create(struct puffs_cc *pcc, void *opc, void **newnode, 158 const struct puffs_cn *pcn, const struct vattr *va) 159 { 160 PSSHFSAUTOVAR(pcc); 161 struct puffs_node *pn = opc; 162 struct puffs_node *pn_new; 163 char *fhand = NULL; 164 size_t fhandlen; 165 166 pn_new = allocnode(pu, pn, pcn->pcn_name, va); 167 if (!pn) { 168 rv = ENOMEM; 169 goto out; 170 } 171 172 psbuf_req_data(pb, SSH_FXP_OPEN, reqid, pcn->pcn_fullpath, 173 strlen(pcn->pcn_fullpath)); 174 psbuf_put_4(pb, SSH_FXF_WRITE | SSH_FXF_CREAT | SSH_FXF_TRUNC); 175 psbuf_put_vattr(pb, va); 176 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 177 178 puffs_cc_yield(pcc); 179 180 rv = psbuf_expect_handle(pb, &fhand, &fhandlen); 181 if (rv) 182 goto out; 183 184 reqid = NEXTREQ(pctx); 185 psbuf_recycle(pb, PSB_OUT); 186 psbuf_req_data(pb, SSH_FXP_CLOSE, reqid, fhand, fhandlen); 187 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 188 189 puffs_cc_yield(pcc); 190 rv = psbuf_expect_status(pb); 191 192 if (rv == 0) 193 *newnode = pn_new; 194 else 195 nukenode(pn_new, pcn->pcn_name); 196 197 out: 198 free(fhand); 199 PSSHFSRETURN(rv); 200 } 201 202 int 203 psshfs_node_readdir(struct puffs_cc *pcc, void *opc, struct dirent *dent, 204 const struct puffs_cred *pcr, off_t *readoff, size_t *reslen) 205 { 206 struct puffs_usermount *pu = puffs_cc_getusermount(pcc); 207 struct psshfs_ctx *pctx = pu->pu_privdata; 208 struct puffs_node *pn = opc; 209 struct psshfs_node *psn = pn->pn_data; 210 struct psshfs_dir *pd; 211 int i, rv; 212 213 rv = sftp_readdir(pcc, pctx, pn); 214 if (rv) 215 return rv; 216 217 for (i = *readoff; i < psn->dentnext; i++) { 218 pd = &psn->dir[i]; 219 if (pd->valid == 0) 220 continue; 221 if (!puffs_nextdent(&dent, pd->entryname, 222 pd->va.va_fileid, puffs_vtype2dt(pd->va.va_type), reslen)) 223 break; 224 } 225 226 *readoff = i; 227 return 0; 228 } 229 230 int 231 psshfs_node_read(struct puffs_cc *pcc, void *opc, uint8_t *buf, 232 off_t offset, size_t *resid, const struct puffs_cred *pcr, 233 int ioflag) 234 { 235 PSSHFSAUTOVAR(pcc); 236 struct puffs_node *pn = opc; 237 char *fhand = NULL; 238 size_t fhandlen; 239 struct vattr va; 240 uint32_t readlen; 241 242 if (pn->pn_va.va_type == VDIR) { 243 rv = EISDIR; 244 goto out; 245 } 246 247 puffs_vattr_null(&va); 248 psbuf_req_str(pb, SSH_FXP_OPEN, reqid, pn->pn_path); 249 psbuf_put_4(pb, SSH_FXF_READ); 250 psbuf_put_vattr(pb, &va); 251 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 252 253 puffs_cc_yield(pcc); 254 255 rv = psbuf_expect_handle(pb, &fhand, &fhandlen); 256 if (rv) 257 goto out; 258 259 readlen = *resid; 260 reqid = NEXTREQ(pctx); 261 psbuf_recycle(pb, PSB_OUT); 262 psbuf_req_data(pb, SSH_FXP_READ, reqid, fhand, fhandlen); 263 psbuf_put_8(pb, offset); 264 psbuf_put_4(pb, readlen); 265 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 266 267 puffs_cc_yield(pcc); 268 269 rv = psbuf_do_data(pb, buf, &readlen); 270 if (rv == 0) 271 *resid -= readlen; 272 273 reqid = NEXTREQ(pctx); 274 psbuf_recycle(pb, PSB_OUT); 275 psbuf_req_data(pb, SSH_FXP_CLOSE, reqid, fhand, fhandlen); 276 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 277 278 puffs_cc_yield(pcc); 279 280 /* don't care */ 281 282 out: 283 free(fhand); 284 PSSHFSRETURN(rv); 285 } 286 287 /* XXX: we should getattr for size */ 288 int 289 psshfs_node_write(struct puffs_cc *pcc, void *opc, uint8_t *buf, 290 off_t offset, size_t *resid, const struct puffs_cred *cred, 291 int ioflag) 292 { 293 PSSHFSAUTOVAR(pcc); 294 struct puffs_node *pn = opc; 295 char *fhand = NULL; 296 size_t fhandlen; 297 struct vattr va, kludgeva1, kludgeva2; 298 uint32_t writelen, oflags; 299 300 if (pn->pn_va.va_type == VDIR) { 301 rv = EISDIR; 302 goto out; 303 } 304 305 /* 306 * XXXX: this is wrong - we shouldn't muck the file permissions 307 * at this stage any more. However, we need this, since currently 308 * we can't tell the sftp server "hey, this data was already 309 * authenticated to UBC, it's ok to let us write this". Yes, it 310 * will fail e.g. if we don't own the file. Tough love. 311 * 312 * TODO-point: Investigate solving this with open filehandles 313 * or something like that. 314 */ 315 kludgeva1 = pn->pn_va; 316 317 puffs_vattr_null(&kludgeva2); 318 kludgeva2.va_mode = 0700; 319 rv = psshfs_node_setattr(pcc, opc, &kludgeva2, cred, 0); 320 if (rv) 321 goto out; 322 323 /* XXXcontinuation: ok, file is mode 700 now, we can open it rw */ 324 325 oflags = SSH_FXF_WRITE; 326 #if 0 327 /* 328 * At least OpenSSH doesn't appear to support this, so can't 329 * do it the right way. 330 */ 331 if (ioflag & PUFFS_IO_APPEND) 332 oflags |= SSH_FXF_APPEND; 333 #endif 334 if (ioflag & PUFFS_IO_APPEND) 335 offset = pn->pn_va.va_size; 336 337 puffs_vattr_null(&va); 338 psbuf_req_str(pb, SSH_FXP_OPEN, reqid, pn->pn_path); 339 psbuf_put_4(pb, oflags); 340 psbuf_put_vattr(pb, &va); 341 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 342 343 puffs_cc_yield(pcc); 344 345 rv = psbuf_expect_handle(pb, &fhand, &fhandlen); 346 if (rv) 347 goto out; 348 349 /* moreXXX: file is open, revert old creds for crying out loud! */ 350 rv = psshfs_node_setattr(pcc, opc, &kludgeva1, cred, 0); 351 352 /* are we screwed a la royal jelly? */ 353 if (rv) 354 goto closefile; 355 356 writelen = *resid; 357 reqid = NEXTREQ(pctx); 358 psbuf_recycle(pb, PSB_OUT); 359 psbuf_req_data(pb, SSH_FXP_WRITE, reqid, fhand, fhandlen); 360 psbuf_put_8(pb, offset); 361 psbuf_put_data(pb, buf, writelen); 362 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 363 364 puffs_cc_yield(pcc); 365 366 rv = psbuf_expect_status(pb); 367 if (rv == 0) 368 *resid = 0; 369 370 if (pn->pn_va.va_size < offset + writelen) 371 pn->pn_va.va_size = offset + writelen; 372 373 closefile: 374 reqid = NEXTREQ(pctx); 375 psbuf_recycle(pb, PSB_OUT); 376 psbuf_req_data(pb, SSH_FXP_CLOSE, reqid, fhand, fhandlen); 377 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 378 379 puffs_cc_yield(pcc); 380 381 /* dontcare */ 382 out: 383 free(fhand); 384 PSSHFSRETURN(rv); 385 } 386 387 int 388 psshfs_node_readlink(struct puffs_cc *pcc, void *opc, 389 const struct puffs_cred *cred, char *linkvalue, size_t *linklen) 390 { 391 PSSHFSAUTOVAR(pcc); 392 struct puffs_node *pn = opc; 393 char *linktmp = NULL; 394 uint32_t count; 395 396 if (pctx->protover < 3) { 397 rv = EOPNOTSUPP; 398 goto out; 399 } 400 401 psbuf_req_str(pb, SSH_FXP_READLINK, reqid, pn->pn_path); 402 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 403 404 puffs_cc_yield(pcc); 405 406 rv = psbuf_expect_name(pb, &count); 407 if (count != 1) { 408 rv = EPROTO; 409 goto out; 410 } 411 rv = psbuf_get_str(pb, &linktmp, linklen); 412 if (rv) 413 rv = 0; 414 else { 415 rv = EPROTO; 416 goto out; 417 } 418 (void) memcpy(linkvalue, linktmp, *linklen); 419 420 out: 421 free(linktmp); 422 PSSHFSRETURN(rv); 423 } 424 425 int 426 psshfs_node_remove(struct puffs_cc *pcc, void *opc, void *targ, 427 const struct puffs_cn *pcn) 428 { 429 PSSHFSAUTOVAR(pcc); 430 struct puffs_node *pn_targ = targ; 431 432 if (pn_targ->pn_va.va_type == VDIR) { 433 rv = EPERM; 434 goto out; 435 } 436 437 psbuf_req_str(pb, SSH_FXP_REMOVE, reqid, pn_targ->pn_path); 438 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 439 440 puffs_cc_yield(pcc); 441 442 rv = psbuf_expect_status(pb); 443 444 if (rv == 0) 445 nukenode(pn_targ, pcn->pcn_name); 446 447 out: 448 PSSHFSRETURN(rv); 449 } 450 451 int 452 psshfs_node_mkdir(struct puffs_cc *pcc, void *opc, void **newnode, 453 const struct puffs_cn *pcn, const struct vattr *va) 454 { 455 PSSHFSAUTOVAR(pcc); 456 struct puffs_node *pn = opc; 457 struct puffs_node *pn_new; 458 459 pn_new = allocnode(pu, pn, pcn->pcn_name, va); 460 if (!pn_new) { 461 rv = ENOMEM; 462 goto out; 463 } 464 465 psbuf_req_str(pb, SSH_FXP_MKDIR, reqid, pcn->pcn_fullpath); 466 psbuf_put_vattr(pb, va); 467 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 468 469 puffs_cc_yield(pcc); 470 471 rv = psbuf_expect_status(pb); 472 473 if (rv == 0) 474 *newnode = pn_new; 475 else 476 nukenode(pn_new, pcn->pcn_name); 477 478 out: 479 PSSHFSRETURN(rv); 480 } 481 482 int 483 psshfs_node_rmdir(struct puffs_cc *pcc, void *opc, void *targ, 484 const struct puffs_cn *pcn) 485 { 486 PSSHFSAUTOVAR(pcc); 487 struct puffs_node *pn_targ = targ; 488 489 psbuf_req_str(pb, SSH_FXP_RMDIR, reqid, pn_targ->pn_path); 490 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 491 492 puffs_cc_yield(pcc); 493 494 rv = psbuf_expect_status(pb); 495 if (rv == 0) 496 nukenode(pn_targ, pcn->pcn_name); 497 498 PSSHFSRETURN(rv); 499 } 500 501 int 502 psshfs_node_symlink(struct puffs_cc *pcc, void *opc, void **newnode, 503 const struct puffs_cn *pcn, const struct vattr *va, 504 const char *link_target) 505 { 506 PSSHFSAUTOVAR(pcc); 507 struct puffs_node *pn = opc; 508 struct puffs_node *pn_new; 509 510 if (pctx->protover < 3) { 511 rv = EOPNOTSUPP; 512 goto out; 513 } 514 515 pn_new = allocnode(pu, pn, pcn->pcn_name, va); 516 if (!pn) { 517 rv = ENOMEM; 518 goto out; 519 } 520 521 /* 522 * XXX: ietf says: source, target. openssh says: ietf who? 523 * Let's go with openssh and build quirk tables later if we care 524 */ 525 psbuf_req_str(pb, SSH_FXP_SYMLINK, reqid, link_target); 526 psbuf_put_str(pb, pcn->pcn_fullpath); 527 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 528 529 puffs_cc_yield(pcc); 530 531 rv = psbuf_expect_status(pb); 532 if (rv == 0) 533 *newnode = pn_new; 534 else 535 nukenode(pn_new, pcn->pcn_name); 536 537 out: 538 PSSHFSRETURN(rv); 539 } 540 541 int 542 psshfs_node_rename(struct puffs_cc *pcc, void *opc, void *src, 543 const struct puffs_cn *pcn_src, void *targ_dir, void *targ, 544 const struct puffs_cn *pcn_targ) 545 { 546 PSSHFSAUTOVAR(pcc); 547 struct puffs_node *pn_sf = src; 548 struct puffs_node *pn_td = targ_dir, *pn_tf = targ; 549 struct psshfs_node *psn_targdir = pn_td->pn_data; 550 551 if (pctx->protover < 2) { 552 rv = EOPNOTSUPP; 553 goto out; 554 } 555 556 if (pn_tf) { 557 /* XXX: no backend implementation for now, so call directly */ 558 rv = psshfs_node_remove(pcc, targ_dir, pn_tf, pcn_targ); 559 if (rv) 560 goto out; 561 } 562 563 psbuf_req_str(pb, SSH_FXP_RENAME, reqid, pcn_src->pcn_fullpath); 564 psbuf_put_str(pb, pcn_targ->pcn_fullpath); 565 pssh_outbuf_enqueue(pctx, pb, pcc, reqid); 566 567 puffs_cc_yield(pcc); 568 569 rv = psbuf_expect_status(pb); 570 if (rv == 0) { 571 struct psshfs_dir *pd; 572 573 /* 574 * XXX: interfaces didn't quite work with rename.. 575 * the song remains the same. go figure .. ;) 576 */ 577 nukenode(pn_sf, pcn_src->pcn_name); 578 pd = direnter(pn_td, pcn_targ->pcn_name); 579 pd->entry = pn_sf; 580 puffs_setvattr(&pd->va, &pn_sf->pn_va); 581 582 if (opc != targ_dir) { 583 psn_targdir->childcount++; 584 if (pn_sf->pn_va.va_type == VDIR) 585 pn_td->pn_va.va_nlink++; 586 } 587 } 588 589 out: 590 PSSHFSRETURN(rv); 591 } 592
Indexes created Wed Sep 24 22:09:59 GMT 2025