1 // SPDX-License-Identifier: LGPL-2.1 2 /* 3 * 4 * Copyright (C) International Business Machines Corp., 2002, 2011 5 * Etersoft, 2012 6 * Author(s): Pavel Shilovsky (pshilovsky@samba.org), 7 * Steve French (sfrench@us.ibm.com) 8 * 9 */ 10 #include <linux/fs.h> 11 #include <linux/stat.h> 12 #include <linux/slab.h> 13 #include <linux/pagemap.h> 14 #include <asm/div64.h> 15 #include "cifsfs.h" 16 #include "cifspdu.h" 17 #include "cifsglob.h" 18 #include "cifsproto.h" 19 #include "cifs_debug.h" 20 #include "cifs_fs_sb.h" 21 #include "cifs_unicode.h" 22 #include "fscache.h" 23 #include "smb2glob.h" 24 #include "smb2pdu.h" 25 #include "smb2proto.h" 26 #include "cached_dir.h" 27 #include "smb2status.h" 28 29 static void 30 free_set_inf_compound(struct smb_rqst *rqst) 31 { 32 if (rqst[1].rq_iov) 33 SMB2_set_info_free(&rqst[1]); 34 if (rqst[2].rq_iov) 35 SMB2_close_free(&rqst[2]); 36 } 37 38 39 struct cop_vars { 40 struct cifs_open_parms oparms; 41 struct kvec rsp_iov[3]; 42 struct smb_rqst rqst[3]; 43 struct kvec open_iov[SMB2_CREATE_IOV_SIZE]; 44 struct kvec qi_iov[1]; 45 struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE]; 46 struct kvec close_iov[1]; 47 struct smb2_file_rename_info rename_info; 48 struct smb2_file_link_info link_info; 49 }; 50 51 /* 52 * note: If cfile is passed, the reference to it is dropped here. 53 * So make sure that you do not reuse cfile after return from this func. 54 * 55 * If passing @err_iov and @err_buftype, ensure to make them both large enough (>= 3) to hold all 56 * error responses. Caller is also responsible for freeing them up. 57 */ 58 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, 59 struct cifs_sb_info *cifs_sb, const char *full_path, 60 __u32 desired_access, __u32 create_disposition, __u32 create_options, 61 umode_t mode, void *ptr, int command, struct cifsFileInfo *cfile, 62 __u8 **extbuf, size_t *extbuflen, 63 struct kvec *err_iov, int *err_buftype) 64 { 65 struct cop_vars *vars = NULL; 66 struct kvec *rsp_iov; 67 struct smb_rqst *rqst; 68 int rc; 69 __le16 *utf16_path = NULL; 70 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 71 struct cifs_fid fid; 72 struct cifs_ses *ses = tcon->ses; 73 struct TCP_Server_Info *server; 74 int num_rqst = 0; 75 int resp_buftype[3]; 76 struct smb2_query_info_rsp *qi_rsp = NULL; 77 struct cifs_open_info_data *idata; 78 int flags = 0; 79 __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0}; 80 unsigned int size[2]; 81 void *data[2]; 82 int len; 83 84 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 85 if (vars == NULL) 86 return -ENOMEM; 87 rqst = &vars->rqst[0]; 88 rsp_iov = &vars->rsp_iov[0]; 89 90 server = cifs_pick_channel(ses); 91 92 if (smb3_encryption_required(tcon)) 93 flags |= CIFS_TRANSFORM_REQ; 94 95 resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER; 96 97 /* We already have a handle so we can skip the open */ 98 if (cfile) 99 goto after_open; 100 101 /* Open */ 102 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 103 if (!utf16_path) { 104 rc = -ENOMEM; 105 goto finished; 106 } 107 108 vars->oparms = (struct cifs_open_parms) { 109 .tcon = tcon, 110 .path = full_path, 111 .desired_access = desired_access, 112 .disposition = create_disposition, 113 .create_options = cifs_create_options(cifs_sb, create_options), 114 .fid = &fid, 115 .mode = mode, 116 .cifs_sb = cifs_sb, 117 }; 118 119 rqst[num_rqst].rq_iov = &vars->open_iov[0]; 120 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE; 121 rc = SMB2_open_init(tcon, server, 122 &rqst[num_rqst], &oplock, &vars->oparms, 123 utf16_path); 124 kfree(utf16_path); 125 if (rc) 126 goto finished; 127 128 smb2_set_next_command(tcon, &rqst[num_rqst]); 129 after_open: 130 num_rqst++; 131 rc = 0; 132 133 /* Operation */ 134 switch (command) { 135 case SMB2_OP_QUERY_INFO: 136 rqst[num_rqst].rq_iov = &vars->qi_iov[0]; 137 rqst[num_rqst].rq_nvec = 1; 138 139 if (cfile) 140 rc = SMB2_query_info_init(tcon, server, 141 &rqst[num_rqst], 142 cfile->fid.persistent_fid, 143 cfile->fid.volatile_fid, 144 FILE_ALL_INFORMATION, 145 SMB2_O_INFO_FILE, 0, 146 sizeof(struct smb2_file_all_info) + 147 PATH_MAX * 2, 0, NULL); 148 else { 149 rc = SMB2_query_info_init(tcon, server, 150 &rqst[num_rqst], 151 COMPOUND_FID, 152 COMPOUND_FID, 153 FILE_ALL_INFORMATION, 154 SMB2_O_INFO_FILE, 0, 155 sizeof(struct smb2_file_all_info) + 156 PATH_MAX * 2, 0, NULL); 157 if (!rc) { 158 smb2_set_next_command(tcon, &rqst[num_rqst]); 159 smb2_set_related(&rqst[num_rqst]); 160 } 161 } 162 163 if (rc) 164 goto finished; 165 num_rqst++; 166 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid, 167 full_path); 168 break; 169 case SMB2_OP_POSIX_QUERY_INFO: 170 rqst[num_rqst].rq_iov = &vars->qi_iov[0]; 171 rqst[num_rqst].rq_nvec = 1; 172 173 if (cfile) 174 rc = SMB2_query_info_init(tcon, server, 175 &rqst[num_rqst], 176 cfile->fid.persistent_fid, 177 cfile->fid.volatile_fid, 178 SMB_FIND_FILE_POSIX_INFO, 179 SMB2_O_INFO_FILE, 0, 180 /* TBD: fix following to allow for longer SIDs */ 181 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) + 182 (sizeof(struct cifs_sid) * 2), 0, NULL); 183 else { 184 rc = SMB2_query_info_init(tcon, server, 185 &rqst[num_rqst], 186 COMPOUND_FID, 187 COMPOUND_FID, 188 SMB_FIND_FILE_POSIX_INFO, 189 SMB2_O_INFO_FILE, 0, 190 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) + 191 (sizeof(struct cifs_sid) * 2), 0, NULL); 192 if (!rc) { 193 smb2_set_next_command(tcon, &rqst[num_rqst]); 194 smb2_set_related(&rqst[num_rqst]); 195 } 196 } 197 198 if (rc) 199 goto finished; 200 num_rqst++; 201 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path); 202 break; 203 case SMB2_OP_DELETE: 204 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path); 205 break; 206 case SMB2_OP_MKDIR: 207 /* 208 * Directories are created through parameters in the 209 * SMB2_open() call. 210 */ 211 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path); 212 break; 213 case SMB2_OP_RMDIR: 214 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 215 rqst[num_rqst].rq_nvec = 1; 216 217 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ 218 data[0] = &delete_pending[0]; 219 220 rc = SMB2_set_info_init(tcon, server, 221 &rqst[num_rqst], COMPOUND_FID, 222 COMPOUND_FID, current->tgid, 223 FILE_DISPOSITION_INFORMATION, 224 SMB2_O_INFO_FILE, 0, data, size); 225 if (rc) 226 goto finished; 227 smb2_set_next_command(tcon, &rqst[num_rqst]); 228 smb2_set_related(&rqst[num_rqst++]); 229 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path); 230 break; 231 case SMB2_OP_SET_EOF: 232 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 233 rqst[num_rqst].rq_nvec = 1; 234 235 size[0] = 8; /* sizeof __le64 */ 236 data[0] = ptr; 237 238 if (cfile) { 239 rc = SMB2_set_info_init(tcon, server, 240 &rqst[num_rqst], 241 cfile->fid.persistent_fid, 242 cfile->fid.volatile_fid, 243 current->tgid, 244 FILE_END_OF_FILE_INFORMATION, 245 SMB2_O_INFO_FILE, 0, 246 data, size); 247 } else { 248 rc = SMB2_set_info_init(tcon, server, 249 &rqst[num_rqst], 250 COMPOUND_FID, 251 COMPOUND_FID, 252 current->tgid, 253 FILE_END_OF_FILE_INFORMATION, 254 SMB2_O_INFO_FILE, 0, 255 data, size); 256 if (!rc) { 257 smb2_set_next_command(tcon, &rqst[num_rqst]); 258 smb2_set_related(&rqst[num_rqst]); 259 } 260 } 261 if (rc) 262 goto finished; 263 num_rqst++; 264 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path); 265 break; 266 case SMB2_OP_SET_INFO: 267 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 268 rqst[num_rqst].rq_nvec = 1; 269 270 271 size[0] = sizeof(FILE_BASIC_INFO); 272 data[0] = ptr; 273 274 if (cfile) 275 rc = SMB2_set_info_init(tcon, server, 276 &rqst[num_rqst], 277 cfile->fid.persistent_fid, 278 cfile->fid.volatile_fid, current->tgid, 279 FILE_BASIC_INFORMATION, 280 SMB2_O_INFO_FILE, 0, data, size); 281 else { 282 rc = SMB2_set_info_init(tcon, server, 283 &rqst[num_rqst], 284 COMPOUND_FID, 285 COMPOUND_FID, current->tgid, 286 FILE_BASIC_INFORMATION, 287 SMB2_O_INFO_FILE, 0, data, size); 288 if (!rc) { 289 smb2_set_next_command(tcon, &rqst[num_rqst]); 290 smb2_set_related(&rqst[num_rqst]); 291 } 292 } 293 294 if (rc) 295 goto finished; 296 num_rqst++; 297 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid, 298 full_path); 299 break; 300 case SMB2_OP_RENAME: 301 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 302 rqst[num_rqst].rq_nvec = 2; 303 304 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); 305 306 vars->rename_info.ReplaceIfExists = 1; 307 vars->rename_info.RootDirectory = 0; 308 vars->rename_info.FileNameLength = cpu_to_le32(len); 309 310 size[0] = sizeof(struct smb2_file_rename_info); 311 data[0] = &vars->rename_info; 312 313 size[1] = len + 2 /* null */; 314 data[1] = (__le16 *)ptr; 315 316 if (cfile) 317 rc = SMB2_set_info_init(tcon, server, 318 &rqst[num_rqst], 319 cfile->fid.persistent_fid, 320 cfile->fid.volatile_fid, 321 current->tgid, FILE_RENAME_INFORMATION, 322 SMB2_O_INFO_FILE, 0, data, size); 323 else { 324 rc = SMB2_set_info_init(tcon, server, 325 &rqst[num_rqst], 326 COMPOUND_FID, COMPOUND_FID, 327 current->tgid, FILE_RENAME_INFORMATION, 328 SMB2_O_INFO_FILE, 0, data, size); 329 if (!rc) { 330 smb2_set_next_command(tcon, &rqst[num_rqst]); 331 smb2_set_related(&rqst[num_rqst]); 332 } 333 } 334 if (rc) 335 goto finished; 336 num_rqst++; 337 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path); 338 break; 339 case SMB2_OP_HARDLINK: 340 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 341 rqst[num_rqst].rq_nvec = 2; 342 343 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX)); 344 345 vars->link_info.ReplaceIfExists = 0; 346 vars->link_info.RootDirectory = 0; 347 vars->link_info.FileNameLength = cpu_to_le32(len); 348 349 size[0] = sizeof(struct smb2_file_link_info); 350 data[0] = &vars->link_info; 351 352 size[1] = len + 2 /* null */; 353 data[1] = (__le16 *)ptr; 354 355 rc = SMB2_set_info_init(tcon, server, 356 &rqst[num_rqst], COMPOUND_FID, 357 COMPOUND_FID, current->tgid, 358 FILE_LINK_INFORMATION, 359 SMB2_O_INFO_FILE, 0, data, size); 360 if (rc) 361 goto finished; 362 smb2_set_next_command(tcon, &rqst[num_rqst]); 363 smb2_set_related(&rqst[num_rqst++]); 364 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path); 365 break; 366 default: 367 cifs_dbg(VFS, "Invalid command\n"); 368 rc = -EINVAL; 369 } 370 if (rc) 371 goto finished; 372 373 /* We already have a handle so we can skip the close */ 374 if (cfile) 375 goto after_close; 376 /* Close */ 377 flags |= CIFS_CP_CREATE_CLOSE_OP; 378 rqst[num_rqst].rq_iov = &vars->close_iov[0]; 379 rqst[num_rqst].rq_nvec = 1; 380 rc = SMB2_close_init(tcon, server, 381 &rqst[num_rqst], COMPOUND_FID, 382 COMPOUND_FID, false); 383 smb2_set_related(&rqst[num_rqst]); 384 if (rc) 385 goto finished; 386 after_close: 387 num_rqst++; 388 389 if (cfile) { 390 rc = compound_send_recv(xid, ses, server, 391 flags, num_rqst - 2, 392 &rqst[1], &resp_buftype[1], 393 &rsp_iov[1]); 394 } else 395 rc = compound_send_recv(xid, ses, server, 396 flags, num_rqst, 397 rqst, resp_buftype, 398 rsp_iov); 399 400 finished: 401 if (cfile) 402 cifsFileInfo_put(cfile); 403 404 SMB2_open_free(&rqst[0]); 405 if (rc == -EREMCHG) { 406 pr_warn_once("server share %s deleted\n", tcon->tree_name); 407 tcon->need_reconnect = true; 408 } 409 410 switch (command) { 411 case SMB2_OP_QUERY_INFO: 412 idata = ptr; 413 if (rc == 0 && cfile && cfile->symlink_target) { 414 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 415 if (!idata->symlink_target) 416 rc = -ENOMEM; 417 } 418 if (rc == 0) { 419 qi_rsp = (struct smb2_query_info_rsp *) 420 rsp_iov[1].iov_base; 421 rc = smb2_validate_and_copy_iov( 422 le16_to_cpu(qi_rsp->OutputBufferOffset), 423 le32_to_cpu(qi_rsp->OutputBufferLength), 424 &rsp_iov[1], sizeof(idata->fi), (char *)&idata->fi); 425 } 426 if (rqst[1].rq_iov) 427 SMB2_query_info_free(&rqst[1]); 428 if (rqst[2].rq_iov) 429 SMB2_close_free(&rqst[2]); 430 if (rc) 431 trace_smb3_query_info_compound_err(xid, ses->Suid, 432 tcon->tid, rc); 433 else 434 trace_smb3_query_info_compound_done(xid, ses->Suid, 435 tcon->tid); 436 break; 437 case SMB2_OP_POSIX_QUERY_INFO: 438 idata = ptr; 439 if (rc == 0 && cfile && cfile->symlink_target) { 440 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 441 if (!idata->symlink_target) 442 rc = -ENOMEM; 443 } 444 if (rc == 0) { 445 qi_rsp = (struct smb2_query_info_rsp *) 446 rsp_iov[1].iov_base; 447 rc = smb2_validate_and_copy_iov( 448 le16_to_cpu(qi_rsp->OutputBufferOffset), 449 le32_to_cpu(qi_rsp->OutputBufferLength), 450 &rsp_iov[1], sizeof(idata->posix_fi) /* add SIDs */, 451 (char *)&idata->posix_fi); 452 } 453 if (rc == 0) { 454 unsigned int length = le32_to_cpu(qi_rsp->OutputBufferLength); 455 456 if (length > sizeof(idata->posix_fi)) { 457 char *base = (char *)rsp_iov[1].iov_base + 458 le16_to_cpu(qi_rsp->OutputBufferOffset) + 459 sizeof(idata->posix_fi); 460 *extbuflen = length - sizeof(idata->posix_fi); 461 *extbuf = kmemdup(base, *extbuflen, GFP_KERNEL); 462 if (!*extbuf) 463 rc = -ENOMEM; 464 } else { 465 rc = -EINVAL; 466 } 467 } 468 if (rqst[1].rq_iov) 469 SMB2_query_info_free(&rqst[1]); 470 if (rqst[2].rq_iov) 471 SMB2_close_free(&rqst[2]); 472 if (rc) 473 trace_smb3_posix_query_info_compound_err(xid, ses->Suid, tcon->tid, rc); 474 else 475 trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid); 476 break; 477 case SMB2_OP_DELETE: 478 if (rc) 479 trace_smb3_delete_err(xid, ses->Suid, tcon->tid, rc); 480 else 481 trace_smb3_delete_done(xid, ses->Suid, tcon->tid); 482 if (rqst[1].rq_iov) 483 SMB2_close_free(&rqst[1]); 484 break; 485 case SMB2_OP_MKDIR: 486 if (rc) 487 trace_smb3_mkdir_err(xid, ses->Suid, tcon->tid, rc); 488 else 489 trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid); 490 if (rqst[1].rq_iov) 491 SMB2_close_free(&rqst[1]); 492 break; 493 case SMB2_OP_HARDLINK: 494 if (rc) 495 trace_smb3_hardlink_err(xid, ses->Suid, tcon->tid, rc); 496 else 497 trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid); 498 free_set_inf_compound(rqst); 499 break; 500 case SMB2_OP_RENAME: 501 if (rc) 502 trace_smb3_rename_err(xid, ses->Suid, tcon->tid, rc); 503 else 504 trace_smb3_rename_done(xid, ses->Suid, tcon->tid); 505 free_set_inf_compound(rqst); 506 break; 507 case SMB2_OP_RMDIR: 508 if (rc) 509 trace_smb3_rmdir_err(xid, ses->Suid, tcon->tid, rc); 510 else 511 trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid); 512 free_set_inf_compound(rqst); 513 break; 514 case SMB2_OP_SET_EOF: 515 if (rc) 516 trace_smb3_set_eof_err(xid, ses->Suid, tcon->tid, rc); 517 else 518 trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid); 519 free_set_inf_compound(rqst); 520 break; 521 case SMB2_OP_SET_INFO: 522 if (rc) 523 trace_smb3_set_info_compound_err(xid, ses->Suid, 524 tcon->tid, rc); 525 else 526 trace_smb3_set_info_compound_done(xid, ses->Suid, 527 tcon->tid); 528 free_set_inf_compound(rqst); 529 break; 530 } 531 532 if (rc && err_iov && err_buftype) { 533 memcpy(err_iov, rsp_iov, 3 * sizeof(*err_iov)); 534 memcpy(err_buftype, resp_buftype, 3 * sizeof(*err_buftype)); 535 } else { 536 free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base); 537 free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base); 538 free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base); 539 } 540 kfree(vars); 541 return rc; 542 } 543 544 int smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, 545 struct cifs_sb_info *cifs_sb, const char *full_path, 546 struct cifs_open_info_data *data, bool *adjust_tz, bool *reparse) 547 { 548 __u32 create_options = 0; 549 struct cifsFileInfo *cfile; 550 struct cached_fid *cfid = NULL; 551 struct kvec err_iov[3] = {}; 552 int err_buftype[3] = {}; 553 bool islink; 554 int rc, rc2; 555 556 *adjust_tz = false; 557 *reparse = false; 558 559 if (strcmp(full_path, "")) 560 rc = -ENOENT; 561 else 562 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, false, &cfid); 563 /* If it is a root and its handle is cached then use it */ 564 if (!rc) { 565 if (cfid->file_all_info_is_valid) { 566 memcpy(&data->fi, &cfid->file_all_info, sizeof(data->fi)); 567 } else { 568 rc = SMB2_query_info(xid, tcon, cfid->fid.persistent_fid, 569 cfid->fid.volatile_fid, &data->fi); 570 } 571 close_cached_dir(cfid); 572 return rc; 573 } 574 575 cifs_get_readable_path(tcon, full_path, &cfile); 576 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, 577 create_options, ACL_NO_MODE, data, SMB2_OP_QUERY_INFO, cfile, 578 NULL, NULL, err_iov, err_buftype); 579 if (rc) { 580 struct smb2_hdr *hdr = err_iov[0].iov_base; 581 582 if (unlikely(!hdr || err_buftype[0] == CIFS_NO_BUFFER)) 583 goto out; 584 if (rc == -EOPNOTSUPP && hdr->Command == SMB2_CREATE && 585 hdr->Status == STATUS_STOPPED_ON_SYMLINK) { 586 rc = smb2_parse_symlink_response(cifs_sb, err_iov, 587 &data->symlink_target); 588 if (rc) 589 goto out; 590 591 *reparse = true; 592 create_options |= OPEN_REPARSE_POINT; 593 594 /* Failed on a symbolic link - query a reparse point info */ 595 cifs_get_readable_path(tcon, full_path, &cfile); 596 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 597 FILE_READ_ATTRIBUTES, FILE_OPEN, 598 create_options, ACL_NO_MODE, data, 599 SMB2_OP_QUERY_INFO, cfile, NULL, NULL, 600 NULL, NULL); 601 goto out; 602 } else if (rc != -EREMOTE && hdr->Status == STATUS_OBJECT_NAME_INVALID) { 603 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 604 full_path, &islink); 605 if (rc2) { 606 rc = rc2; 607 goto out; 608 } 609 if (islink) 610 rc = -EREMOTE; 611 } 612 if (rc == -EREMOTE && IS_ENABLED(CONFIG_CIFS_DFS_UPCALL) && cifs_sb && 613 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)) 614 rc = -EOPNOTSUPP; 615 } 616 617 out: 618 free_rsp_buf(err_buftype[0], err_iov[0].iov_base); 619 free_rsp_buf(err_buftype[1], err_iov[1].iov_base); 620 free_rsp_buf(err_buftype[2], err_iov[2].iov_base); 621 return rc; 622 } 623 624 625 int smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon, 626 struct cifs_sb_info *cifs_sb, const char *full_path, 627 struct cifs_open_info_data *data, 628 struct cifs_sid *owner, 629 struct cifs_sid *group, 630 bool *adjust_tz, bool *reparse) 631 { 632 int rc; 633 __u32 create_options = 0; 634 struct cifsFileInfo *cfile; 635 struct kvec err_iov[3] = {}; 636 int err_buftype[3] = {}; 637 __u8 *sidsbuf = NULL; 638 __u8 *sidsbuf_end = NULL; 639 size_t sidsbuflen = 0; 640 size_t owner_len, group_len; 641 642 *adjust_tz = false; 643 *reparse = false; 644 645 /* 646 * BB TODO: Add support for using the cached root handle. 647 * Create SMB2_query_posix_info worker function to do non-compounded query 648 * when we already have an open file handle for this. For now this is fast enough 649 * (always using the compounded version). 650 */ 651 652 cifs_get_readable_path(tcon, full_path, &cfile); 653 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, FILE_OPEN, 654 create_options, ACL_NO_MODE, data, SMB2_OP_POSIX_QUERY_INFO, cfile, 655 &sidsbuf, &sidsbuflen, err_iov, err_buftype); 656 if (rc == -EOPNOTSUPP) { 657 /* BB TODO: When support for special files added to Samba re-verify this path */ 658 if (err_iov[0].iov_base && err_buftype[0] != CIFS_NO_BUFFER && 659 ((struct smb2_hdr *)err_iov[0].iov_base)->Command == SMB2_CREATE && 660 ((struct smb2_hdr *)err_iov[0].iov_base)->Status == STATUS_STOPPED_ON_SYMLINK) { 661 rc = smb2_parse_symlink_response(cifs_sb, err_iov, &data->symlink_target); 662 if (rc) 663 goto out; 664 } 665 *reparse = true; 666 create_options |= OPEN_REPARSE_POINT; 667 668 /* Failed on a symbolic link - query a reparse point info */ 669 cifs_get_readable_path(tcon, full_path, &cfile); 670 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, FILE_READ_ATTRIBUTES, 671 FILE_OPEN, create_options, ACL_NO_MODE, data, 672 SMB2_OP_POSIX_QUERY_INFO, cfile, 673 &sidsbuf, &sidsbuflen, NULL, NULL); 674 } 675 676 if (rc == 0) { 677 sidsbuf_end = sidsbuf + sidsbuflen; 678 679 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end); 680 if (owner_len == -1) { 681 rc = -EINVAL; 682 goto out; 683 } 684 memcpy(owner, sidsbuf, owner_len); 685 686 group_len = posix_info_sid_size( 687 sidsbuf + owner_len, sidsbuf_end); 688 if (group_len == -1) { 689 rc = -EINVAL; 690 goto out; 691 } 692 memcpy(group, sidsbuf + owner_len, group_len); 693 } 694 695 out: 696 kfree(sidsbuf); 697 free_rsp_buf(err_buftype[0], err_iov[0].iov_base); 698 free_rsp_buf(err_buftype[1], err_iov[1].iov_base); 699 free_rsp_buf(err_buftype[2], err_iov[2].iov_base); 700 return rc; 701 } 702 703 int 704 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, 705 struct cifs_tcon *tcon, const char *name, 706 struct cifs_sb_info *cifs_sb) 707 { 708 return smb2_compound_op(xid, tcon, cifs_sb, name, 709 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 710 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR, 711 NULL, NULL, NULL, NULL, NULL); 712 } 713 714 void 715 smb2_mkdir_setinfo(struct inode *inode, const char *name, 716 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 717 const unsigned int xid) 718 { 719 FILE_BASIC_INFO data; 720 struct cifsInodeInfo *cifs_i; 721 struct cifsFileInfo *cfile; 722 u32 dosattrs; 723 int tmprc; 724 725 memset(&data, 0, sizeof(data)); 726 cifs_i = CIFS_I(inode); 727 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 728 data.Attributes = cpu_to_le32(dosattrs); 729 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); 730 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, 731 FILE_WRITE_ATTRIBUTES, FILE_CREATE, 732 CREATE_NOT_FILE, ACL_NO_MODE, 733 &data, SMB2_OP_SET_INFO, cfile, NULL, NULL, NULL, NULL); 734 if (tmprc == 0) 735 cifs_i->cifsAttrs = dosattrs; 736 } 737 738 int 739 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 740 struct cifs_sb_info *cifs_sb) 741 { 742 drop_cached_dir_by_name(xid, tcon, name, cifs_sb); 743 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 744 CREATE_NOT_FILE, ACL_NO_MODE, 745 NULL, SMB2_OP_RMDIR, NULL, NULL, NULL, NULL, NULL); 746 } 747 748 int 749 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 750 struct cifs_sb_info *cifs_sb) 751 { 752 return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN, 753 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, 754 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL, NULL, NULL, NULL, NULL); 755 } 756 757 static int 758 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 759 const char *from_name, const char *to_name, 760 struct cifs_sb_info *cifs_sb, __u32 access, int command, 761 struct cifsFileInfo *cfile) 762 { 763 __le16 *smb2_to_name = NULL; 764 int rc; 765 766 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 767 if (smb2_to_name == NULL) { 768 rc = -ENOMEM; 769 goto smb2_rename_path; 770 } 771 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access, 772 FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name, 773 command, cfile, NULL, NULL, NULL, NULL); 774 smb2_rename_path: 775 kfree(smb2_to_name); 776 return rc; 777 } 778 779 int 780 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon, 781 const char *from_name, const char *to_name, 782 struct cifs_sb_info *cifs_sb) 783 { 784 struct cifsFileInfo *cfile; 785 786 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb); 787 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); 788 789 return smb2_set_path_attr(xid, tcon, from_name, to_name, 790 cifs_sb, DELETE, SMB2_OP_RENAME, cfile); 791 } 792 793 int 794 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon, 795 const char *from_name, const char *to_name, 796 struct cifs_sb_info *cifs_sb) 797 { 798 return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 799 FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK, 800 NULL); 801 } 802 803 int 804 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 805 const char *full_path, __u64 size, 806 struct cifs_sb_info *cifs_sb, bool set_alloc) 807 { 808 __le64 eof = cpu_to_le64(size); 809 struct cifsFileInfo *cfile; 810 811 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 812 return smb2_compound_op(xid, tcon, cifs_sb, full_path, 813 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE, 814 &eof, SMB2_OP_SET_EOF, cfile, NULL, NULL, NULL, NULL); 815 } 816 817 int 818 smb2_set_file_info(struct inode *inode, const char *full_path, 819 FILE_BASIC_INFO *buf, const unsigned int xid) 820 { 821 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 822 struct tcon_link *tlink; 823 struct cifs_tcon *tcon; 824 struct cifsFileInfo *cfile; 825 int rc; 826 827 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && 828 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) && 829 (buf->Attributes == 0)) 830 return 0; /* would be a no op, no sense sending this */ 831 832 tlink = cifs_sb_tlink(cifs_sb); 833 if (IS_ERR(tlink)) 834 return PTR_ERR(tlink); 835 tcon = tlink_tcon(tlink); 836 837 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 838 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 839 FILE_WRITE_ATTRIBUTES, FILE_OPEN, 840 0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile, 841 NULL, NULL, NULL, NULL); 842 cifs_put_tlink(tlink); 843 return rc; 844 } 845