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 "../common/smb2status.h" 28 29 static struct reparse_data_buffer *reparse_buf_ptr(struct kvec *iov) 30 { 31 struct reparse_data_buffer *buf; 32 struct smb2_ioctl_rsp *io = iov->iov_base; 33 u32 off, count, len; 34 35 count = le32_to_cpu(io->OutputCount); 36 off = le32_to_cpu(io->OutputOffset); 37 if (check_add_overflow(off, count, &len) || len > iov->iov_len) 38 return ERR_PTR(-EIO); 39 40 buf = (struct reparse_data_buffer *)((u8 *)io + off); 41 len = sizeof(*buf); 42 if (count < len || count < le16_to_cpu(buf->ReparseDataLength) + len) 43 return ERR_PTR(-EIO); 44 return buf; 45 } 46 47 static inline __u32 file_create_options(struct dentry *dentry) 48 { 49 struct cifsInodeInfo *ci; 50 51 if (dentry) { 52 ci = CIFS_I(d_inode(dentry)); 53 if (ci->cifsAttrs & ATTR_REPARSE) 54 return OPEN_REPARSE_POINT; 55 } 56 return 0; 57 } 58 59 /* Parse owner and group from SMB3.1.1 POSIX query info */ 60 static int parse_posix_sids(struct cifs_open_info_data *data, 61 struct kvec *rsp_iov) 62 { 63 struct smb2_query_info_rsp *qi = rsp_iov->iov_base; 64 unsigned int out_len = le32_to_cpu(qi->OutputBufferLength); 65 unsigned int qi_len = sizeof(data->posix_fi); 66 int owner_len, group_len; 67 u8 *sidsbuf, *sidsbuf_end; 68 69 if (out_len <= qi_len) 70 return -EINVAL; 71 72 sidsbuf = (u8 *)qi + le16_to_cpu(qi->OutputBufferOffset) + qi_len; 73 sidsbuf_end = sidsbuf + out_len - qi_len; 74 75 owner_len = posix_info_sid_size(sidsbuf, sidsbuf_end); 76 if (owner_len == -1) 77 return -EINVAL; 78 79 memcpy(&data->posix_owner, sidsbuf, owner_len); 80 group_len = posix_info_sid_size(sidsbuf + owner_len, sidsbuf_end); 81 if (group_len == -1) 82 return -EINVAL; 83 84 memcpy(&data->posix_group, sidsbuf + owner_len, group_len); 85 return 0; 86 } 87 88 struct wsl_query_ea { 89 __le32 next; 90 __u8 name_len; 91 __u8 name[SMB2_WSL_XATTR_NAME_LEN + 1]; 92 } __packed; 93 94 #define NEXT_OFF cpu_to_le32(sizeof(struct wsl_query_ea)) 95 96 static const struct wsl_query_ea wsl_query_eas[] = { 97 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_UID, }, 98 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_GID, }, 99 { .next = NEXT_OFF, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_MODE, }, 100 { .next = 0, .name_len = SMB2_WSL_XATTR_NAME_LEN, .name = SMB2_WSL_XATTR_DEV, }, 101 }; 102 103 static int check_wsl_eas(struct kvec *rsp_iov) 104 { 105 struct smb2_file_full_ea_info *ea; 106 struct smb2_query_info_rsp *rsp = rsp_iov->iov_base; 107 unsigned long addr; 108 u32 outlen, next; 109 u16 vlen; 110 u8 nlen; 111 u8 *end; 112 113 outlen = le32_to_cpu(rsp->OutputBufferLength); 114 if (outlen < SMB2_WSL_MIN_QUERY_EA_RESP_SIZE || 115 outlen > SMB2_WSL_MAX_QUERY_EA_RESP_SIZE) 116 return -EINVAL; 117 118 ea = (void *)((u8 *)rsp_iov->iov_base + 119 le16_to_cpu(rsp->OutputBufferOffset)); 120 end = (u8 *)rsp_iov->iov_base + rsp_iov->iov_len; 121 for (;;) { 122 if ((u8 *)ea > end - sizeof(*ea)) 123 return -EINVAL; 124 125 nlen = ea->ea_name_length; 126 vlen = le16_to_cpu(ea->ea_value_length); 127 if (nlen != SMB2_WSL_XATTR_NAME_LEN || 128 (u8 *)ea + nlen + 1 + vlen > end) 129 return -EINVAL; 130 131 switch (vlen) { 132 case 4: 133 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) && 134 strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) && 135 strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen)) 136 return -EINVAL; 137 break; 138 case 8: 139 if (strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen)) 140 return -EINVAL; 141 break; 142 case 0: 143 if (!strncmp(ea->ea_data, SMB2_WSL_XATTR_UID, nlen) || 144 !strncmp(ea->ea_data, SMB2_WSL_XATTR_GID, nlen) || 145 !strncmp(ea->ea_data, SMB2_WSL_XATTR_MODE, nlen) || 146 !strncmp(ea->ea_data, SMB2_WSL_XATTR_DEV, nlen)) 147 break; 148 fallthrough; 149 default: 150 return -EINVAL; 151 } 152 153 next = le32_to_cpu(ea->next_entry_offset); 154 if (!next) 155 break; 156 if (!IS_ALIGNED(next, 4) || 157 check_add_overflow((unsigned long)ea, next, &addr)) 158 return -EINVAL; 159 ea = (void *)addr; 160 } 161 return 0; 162 } 163 164 /* 165 * note: If cfile is passed, the reference to it is dropped here. 166 * So make sure that you do not reuse cfile after return from this func. 167 * 168 * If passing @out_iov and @out_buftype, ensure to make them both large enough 169 * (>= 3) to hold all compounded responses. Caller is also responsible for 170 * freeing them up with free_rsp_buf(). 171 */ 172 static int smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon, 173 struct cifs_sb_info *cifs_sb, const char *full_path, 174 struct cifs_open_parms *oparms, struct kvec *in_iov, 175 int *cmds, int num_cmds, struct cifsFileInfo *cfile, 176 struct kvec *out_iov, int *out_buftype, struct dentry *dentry) 177 { 178 179 struct smb2_create_rsp *create_rsp = NULL; 180 struct smb2_query_info_rsp *qi_rsp = NULL; 181 struct smb2_compound_vars *vars = NULL; 182 __u8 oplock = SMB2_OPLOCK_LEVEL_NONE; 183 struct cifs_open_info_data *idata; 184 struct cifs_ses *ses = tcon->ses; 185 struct reparse_data_buffer *rbuf; 186 struct TCP_Server_Info *server; 187 int resp_buftype[MAX_COMPOUND]; 188 int retries = 0, cur_sleep = 1; 189 __u8 delete_pending[8] = {1,}; 190 struct kvec *rsp_iov, *iov; 191 struct inode *inode = NULL; 192 __le16 *utf16_path = NULL; 193 struct smb_rqst *rqst; 194 unsigned int size[2]; 195 struct cifs_fid fid; 196 int num_rqst = 0, i; 197 unsigned int len; 198 int tmp_rc, rc; 199 int flags = 0; 200 void *data[2]; 201 202 replay_again: 203 /* reinitialize for possible replay */ 204 flags = 0; 205 oplock = SMB2_OPLOCK_LEVEL_NONE; 206 num_rqst = 0; 207 server = cifs_pick_channel(ses); 208 209 vars = kzalloc(sizeof(*vars), GFP_ATOMIC); 210 if (vars == NULL) 211 return -ENOMEM; 212 rqst = &vars->rqst[0]; 213 rsp_iov = &vars->rsp_iov[0]; 214 215 if (smb3_encryption_required(tcon)) 216 flags |= CIFS_TRANSFORM_REQ; 217 218 for (i = 0; i < ARRAY_SIZE(resp_buftype); i++) 219 resp_buftype[i] = CIFS_NO_BUFFER; 220 221 /* We already have a handle so we can skip the open */ 222 if (cfile) 223 goto after_open; 224 225 /* Open */ 226 utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb); 227 if (!utf16_path) { 228 rc = -ENOMEM; 229 goto finished; 230 } 231 232 /* if there is an existing lease, reuse it */ 233 234 /* 235 * note: files with hardlinks cause unexpected behaviour. As per MS-SMB2, 236 * lease keys are associated with the filepath. We are maintaining lease keys 237 * with the inode on the client. If the file has hardlinks, it is possible 238 * that the lease for a file be reused for an operation on its hardlink or 239 * vice versa. 240 * As a workaround, send request using an existing lease key and if the server 241 * returns STATUS_INVALID_PARAMETER, which maps to EINVAL, send the request 242 * again without the lease. 243 */ 244 if (dentry) { 245 inode = d_inode(dentry); 246 if (CIFS_I(inode)->lease_granted && server->ops->get_lease_key) { 247 oplock = SMB2_OPLOCK_LEVEL_LEASE; 248 server->ops->get_lease_key(inode, &fid); 249 } 250 } 251 252 vars->oparms = *oparms; 253 vars->oparms.fid = &fid; 254 255 rqst[num_rqst].rq_iov = &vars->open_iov[0]; 256 rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE; 257 rc = SMB2_open_init(tcon, server, 258 &rqst[num_rqst], &oplock, &vars->oparms, 259 utf16_path); 260 kfree(utf16_path); 261 if (rc) 262 goto finished; 263 264 smb2_set_next_command(tcon, &rqst[num_rqst]); 265 after_open: 266 num_rqst++; 267 rc = 0; 268 269 i = 0; 270 271 /* Skip the leading explicit OPEN operation */ 272 if (num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) 273 i++; 274 275 for (; i < num_cmds; i++) { 276 /* Operation */ 277 switch (cmds[i]) { 278 case SMB2_OP_QUERY_INFO: 279 rqst[num_rqst].rq_iov = &vars->qi_iov; 280 rqst[num_rqst].rq_nvec = 1; 281 282 if (cfile) { 283 rc = SMB2_query_info_init(tcon, server, 284 &rqst[num_rqst], 285 cfile->fid.persistent_fid, 286 cfile->fid.volatile_fid, 287 FILE_ALL_INFORMATION, 288 SMB2_O_INFO_FILE, 0, 289 sizeof(struct smb2_file_all_info) + 290 PATH_MAX * 2, 0, NULL); 291 } else { 292 rc = SMB2_query_info_init(tcon, server, 293 &rqst[num_rqst], 294 COMPOUND_FID, 295 COMPOUND_FID, 296 FILE_ALL_INFORMATION, 297 SMB2_O_INFO_FILE, 0, 298 sizeof(struct smb2_file_all_info) + 299 PATH_MAX * 2, 0, NULL); 300 } 301 if (!rc && (!cfile || num_rqst > 1)) { 302 smb2_set_next_command(tcon, &rqst[num_rqst]); 303 smb2_set_related(&rqst[num_rqst]); 304 } else if (rc) { 305 goto finished; 306 } 307 num_rqst++; 308 trace_smb3_query_info_compound_enter(xid, tcon->tid, 309 ses->Suid, full_path); 310 break; 311 case SMB2_OP_POSIX_QUERY_INFO: 312 rqst[num_rqst].rq_iov = &vars->qi_iov; 313 rqst[num_rqst].rq_nvec = 1; 314 315 if (cfile) { 316 /* TBD: fix following to allow for longer SIDs */ 317 rc = SMB2_query_info_init(tcon, server, 318 &rqst[num_rqst], 319 cfile->fid.persistent_fid, 320 cfile->fid.volatile_fid, 321 SMB_FIND_FILE_POSIX_INFO, 322 SMB2_O_INFO_FILE, 0, 323 sizeof(struct smb311_posix_qinfo *) + 324 (PATH_MAX * 2) + 325 (sizeof(struct smb_sid) * 2), 0, NULL); 326 } else { 327 rc = SMB2_query_info_init(tcon, server, 328 &rqst[num_rqst], 329 COMPOUND_FID, 330 COMPOUND_FID, 331 SMB_FIND_FILE_POSIX_INFO, 332 SMB2_O_INFO_FILE, 0, 333 sizeof(struct smb311_posix_qinfo *) + 334 (PATH_MAX * 2) + 335 (sizeof(struct smb_sid) * 2), 0, NULL); 336 } 337 if (!rc && (!cfile || num_rqst > 1)) { 338 smb2_set_next_command(tcon, &rqst[num_rqst]); 339 smb2_set_related(&rqst[num_rqst]); 340 } else if (rc) { 341 goto finished; 342 } 343 num_rqst++; 344 trace_smb3_posix_query_info_compound_enter(xid, tcon->tid, 345 ses->Suid, full_path); 346 break; 347 case SMB2_OP_DELETE: 348 trace_smb3_delete_enter(xid, tcon->tid, ses->Suid, full_path); 349 break; 350 case SMB2_OP_MKDIR: 351 /* 352 * Directories are created through parameters in the 353 * SMB2_open() call. 354 */ 355 trace_smb3_mkdir_enter(xid, tcon->tid, ses->Suid, full_path); 356 break; 357 case SMB2_OP_RMDIR: 358 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 359 rqst[num_rqst].rq_nvec = 1; 360 361 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */ 362 data[0] = &delete_pending[0]; 363 364 rc = SMB2_set_info_init(tcon, server, 365 &rqst[num_rqst], COMPOUND_FID, 366 COMPOUND_FID, current->tgid, 367 FILE_DISPOSITION_INFORMATION, 368 SMB2_O_INFO_FILE, 0, data, size); 369 if (rc) 370 goto finished; 371 smb2_set_next_command(tcon, &rqst[num_rqst]); 372 smb2_set_related(&rqst[num_rqst++]); 373 trace_smb3_rmdir_enter(xid, tcon->tid, ses->Suid, full_path); 374 break; 375 case SMB2_OP_SET_EOF: 376 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 377 rqst[num_rqst].rq_nvec = 1; 378 379 size[0] = in_iov[i].iov_len; 380 data[0] = in_iov[i].iov_base; 381 382 if (cfile) { 383 rc = SMB2_set_info_init(tcon, server, 384 &rqst[num_rqst], 385 cfile->fid.persistent_fid, 386 cfile->fid.volatile_fid, 387 current->tgid, 388 FILE_END_OF_FILE_INFORMATION, 389 SMB2_O_INFO_FILE, 0, 390 data, size); 391 } else { 392 rc = SMB2_set_info_init(tcon, server, 393 &rqst[num_rqst], 394 COMPOUND_FID, 395 COMPOUND_FID, 396 current->tgid, 397 FILE_END_OF_FILE_INFORMATION, 398 SMB2_O_INFO_FILE, 0, 399 data, size); 400 } 401 if (!rc && (!cfile || num_rqst > 1)) { 402 smb2_set_next_command(tcon, &rqst[num_rqst]); 403 smb2_set_related(&rqst[num_rqst]); 404 } else if (rc) { 405 goto finished; 406 } 407 num_rqst++; 408 trace_smb3_set_eof_enter(xid, tcon->tid, ses->Suid, full_path); 409 break; 410 case SMB2_OP_SET_INFO: 411 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 412 rqst[num_rqst].rq_nvec = 1; 413 414 size[0] = in_iov[i].iov_len; 415 data[0] = in_iov[i].iov_base; 416 417 if (cfile) { 418 rc = SMB2_set_info_init(tcon, server, 419 &rqst[num_rqst], 420 cfile->fid.persistent_fid, 421 cfile->fid.volatile_fid, current->tgid, 422 FILE_BASIC_INFORMATION, 423 SMB2_O_INFO_FILE, 0, data, size); 424 } else { 425 rc = SMB2_set_info_init(tcon, server, 426 &rqst[num_rqst], 427 COMPOUND_FID, 428 COMPOUND_FID, current->tgid, 429 FILE_BASIC_INFORMATION, 430 SMB2_O_INFO_FILE, 0, data, size); 431 } 432 if (!rc && (!cfile || num_rqst > 1)) { 433 smb2_set_next_command(tcon, &rqst[num_rqst]); 434 smb2_set_related(&rqst[num_rqst]); 435 } else if (rc) { 436 goto finished; 437 } 438 num_rqst++; 439 trace_smb3_set_info_compound_enter(xid, tcon->tid, 440 ses->Suid, full_path); 441 break; 442 case SMB2_OP_RENAME: 443 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 444 rqst[num_rqst].rq_nvec = 2; 445 446 len = in_iov[i].iov_len; 447 448 vars->rename_info.ReplaceIfExists = 1; 449 vars->rename_info.RootDirectory = 0; 450 vars->rename_info.FileNameLength = cpu_to_le32(len); 451 452 size[0] = sizeof(struct smb2_file_rename_info); 453 data[0] = &vars->rename_info; 454 455 size[1] = len + 2 /* null */; 456 data[1] = in_iov[i].iov_base; 457 458 if (cfile) { 459 rc = SMB2_set_info_init(tcon, server, 460 &rqst[num_rqst], 461 cfile->fid.persistent_fid, 462 cfile->fid.volatile_fid, 463 current->tgid, FILE_RENAME_INFORMATION, 464 SMB2_O_INFO_FILE, 0, data, size); 465 } else { 466 rc = SMB2_set_info_init(tcon, server, 467 &rqst[num_rqst], 468 COMPOUND_FID, COMPOUND_FID, 469 current->tgid, FILE_RENAME_INFORMATION, 470 SMB2_O_INFO_FILE, 0, data, size); 471 } 472 if (!rc && (!cfile || num_rqst > 1)) { 473 smb2_set_next_command(tcon, &rqst[num_rqst]); 474 smb2_set_related(&rqst[num_rqst]); 475 } else if (rc) { 476 goto finished; 477 } 478 num_rqst++; 479 trace_smb3_rename_enter(xid, tcon->tid, ses->Suid, full_path); 480 break; 481 case SMB2_OP_HARDLINK: 482 rqst[num_rqst].rq_iov = &vars->si_iov[0]; 483 rqst[num_rqst].rq_nvec = 2; 484 485 len = in_iov[i].iov_len; 486 487 vars->link_info.ReplaceIfExists = 0; 488 vars->link_info.RootDirectory = 0; 489 vars->link_info.FileNameLength = cpu_to_le32(len); 490 491 size[0] = sizeof(struct smb2_file_link_info); 492 data[0] = &vars->link_info; 493 494 size[1] = len + 2 /* null */; 495 data[1] = in_iov[i].iov_base; 496 497 rc = SMB2_set_info_init(tcon, server, 498 &rqst[num_rqst], COMPOUND_FID, 499 COMPOUND_FID, current->tgid, 500 FILE_LINK_INFORMATION, 501 SMB2_O_INFO_FILE, 0, data, size); 502 if (rc) 503 goto finished; 504 smb2_set_next_command(tcon, &rqst[num_rqst]); 505 smb2_set_related(&rqst[num_rqst++]); 506 trace_smb3_hardlink_enter(xid, tcon->tid, ses->Suid, full_path); 507 break; 508 case SMB2_OP_SET_REPARSE: 509 rqst[num_rqst].rq_iov = vars->io_iov; 510 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov); 511 512 if (cfile) { 513 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 514 cfile->fid.persistent_fid, 515 cfile->fid.volatile_fid, 516 FSCTL_SET_REPARSE_POINT, 517 in_iov[i].iov_base, 518 in_iov[i].iov_len, 0); 519 } else { 520 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 521 COMPOUND_FID, COMPOUND_FID, 522 FSCTL_SET_REPARSE_POINT, 523 in_iov[i].iov_base, 524 in_iov[i].iov_len, 0); 525 } 526 if (!rc && (!cfile || num_rqst > 1)) { 527 smb2_set_next_command(tcon, &rqst[num_rqst]); 528 smb2_set_related(&rqst[num_rqst]); 529 } else if (rc) { 530 goto finished; 531 } 532 num_rqst++; 533 trace_smb3_set_reparse_compound_enter(xid, tcon->tid, 534 ses->Suid, full_path); 535 break; 536 case SMB2_OP_GET_REPARSE: 537 rqst[num_rqst].rq_iov = vars->io_iov; 538 rqst[num_rqst].rq_nvec = ARRAY_SIZE(vars->io_iov); 539 540 if (cfile) { 541 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 542 cfile->fid.persistent_fid, 543 cfile->fid.volatile_fid, 544 FSCTL_GET_REPARSE_POINT, 545 NULL, 0, CIFSMaxBufSize); 546 } else { 547 rc = SMB2_ioctl_init(tcon, server, &rqst[num_rqst], 548 COMPOUND_FID, COMPOUND_FID, 549 FSCTL_GET_REPARSE_POINT, 550 NULL, 0, CIFSMaxBufSize); 551 } 552 if (!rc && (!cfile || num_rqst > 1)) { 553 smb2_set_next_command(tcon, &rqst[num_rqst]); 554 smb2_set_related(&rqst[num_rqst]); 555 } else if (rc) { 556 goto finished; 557 } 558 num_rqst++; 559 trace_smb3_get_reparse_compound_enter(xid, tcon->tid, 560 ses->Suid, full_path); 561 break; 562 case SMB2_OP_QUERY_WSL_EA: 563 rqst[num_rqst].rq_iov = &vars->ea_iov; 564 rqst[num_rqst].rq_nvec = 1; 565 566 if (cfile) { 567 rc = SMB2_query_info_init(tcon, server, 568 &rqst[num_rqst], 569 cfile->fid.persistent_fid, 570 cfile->fid.volatile_fid, 571 FILE_FULL_EA_INFORMATION, 572 SMB2_O_INFO_FILE, 0, 573 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE, 574 sizeof(wsl_query_eas), 575 (void *)wsl_query_eas); 576 } else { 577 rc = SMB2_query_info_init(tcon, server, 578 &rqst[num_rqst], 579 COMPOUND_FID, 580 COMPOUND_FID, 581 FILE_FULL_EA_INFORMATION, 582 SMB2_O_INFO_FILE, 0, 583 SMB2_WSL_MAX_QUERY_EA_RESP_SIZE, 584 sizeof(wsl_query_eas), 585 (void *)wsl_query_eas); 586 } 587 if (!rc && (!cfile || num_rqst > 1)) { 588 smb2_set_next_command(tcon, &rqst[num_rqst]); 589 smb2_set_related(&rqst[num_rqst]); 590 } else if (rc) { 591 goto finished; 592 } 593 num_rqst++; 594 trace_smb3_query_wsl_ea_compound_enter(xid, tcon->tid, 595 ses->Suid, full_path); 596 break; 597 default: 598 cifs_dbg(VFS, "Invalid command\n"); 599 rc = -EINVAL; 600 } 601 } 602 if (rc) 603 goto finished; 604 605 /* We already have a handle so we can skip the close */ 606 if (cfile) 607 goto after_close; 608 /* Close */ 609 flags |= CIFS_CP_CREATE_CLOSE_OP; 610 rqst[num_rqst].rq_iov = &vars->close_iov; 611 rqst[num_rqst].rq_nvec = 1; 612 rc = SMB2_close_init(tcon, server, 613 &rqst[num_rqst], COMPOUND_FID, 614 COMPOUND_FID, false); 615 smb2_set_related(&rqst[num_rqst]); 616 if (rc) 617 goto finished; 618 after_close: 619 num_rqst++; 620 621 if (cfile) { 622 if (retries) 623 for (i = 1; i < num_rqst - 2; i++) 624 smb2_set_replay(server, &rqst[i]); 625 626 rc = compound_send_recv(xid, ses, server, 627 flags, num_rqst - 2, 628 &rqst[1], &resp_buftype[1], 629 &rsp_iov[1]); 630 } else { 631 if (retries) 632 for (i = 0; i < num_rqst; i++) 633 smb2_set_replay(server, &rqst[i]); 634 635 rc = compound_send_recv(xid, ses, server, 636 flags, num_rqst, 637 rqst, resp_buftype, 638 rsp_iov); 639 } 640 641 finished: 642 num_rqst = 0; 643 SMB2_open_free(&rqst[num_rqst++]); 644 if (rc == -EREMCHG) { 645 pr_warn_once("server share %s deleted\n", tcon->tree_name); 646 tcon->need_reconnect = true; 647 } 648 649 tmp_rc = rc; 650 651 if (rc == 0 && num_cmds > 0 && cmds[0] == SMB2_OP_OPEN_QUERY) { 652 create_rsp = rsp_iov[0].iov_base; 653 idata = in_iov[0].iov_base; 654 idata->fi.CreationTime = create_rsp->CreationTime; 655 idata->fi.LastAccessTime = create_rsp->LastAccessTime; 656 idata->fi.LastWriteTime = create_rsp->LastWriteTime; 657 idata->fi.ChangeTime = create_rsp->ChangeTime; 658 idata->fi.Attributes = create_rsp->FileAttributes; 659 idata->fi.AllocationSize = create_rsp->AllocationSize; 660 idata->fi.EndOfFile = create_rsp->EndofFile; 661 if (le32_to_cpu(idata->fi.NumberOfLinks) == 0) 662 idata->fi.NumberOfLinks = cpu_to_le32(1); /* dummy value */ 663 idata->fi.DeletePending = 0; 664 idata->fi.Directory = !!(le32_to_cpu(create_rsp->FileAttributes) & ATTR_DIRECTORY); 665 666 /* smb2_parse_contexts() fills idata->fi.IndexNumber */ 667 rc = smb2_parse_contexts(server, &rsp_iov[0], &oparms->fid->epoch, 668 oparms->fid->lease_key, &oplock, &idata->fi, NULL); 669 } 670 671 for (i = 0; i < num_cmds; i++) { 672 char *buf = rsp_iov[i + i].iov_base; 673 674 if (buf && resp_buftype[i + 1] != CIFS_NO_BUFFER) 675 rc = server->ops->map_error(buf, false); 676 else 677 rc = tmp_rc; 678 switch (cmds[i]) { 679 case SMB2_OP_QUERY_INFO: 680 idata = in_iov[i].iov_base; 681 idata->contains_posix_file_info = false; 682 if (rc == 0 && cfile && cfile->symlink_target) { 683 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 684 if (!idata->symlink_target) 685 rc = -ENOMEM; 686 } 687 if (rc == 0) { 688 qi_rsp = (struct smb2_query_info_rsp *) 689 rsp_iov[i + 1].iov_base; 690 rc = smb2_validate_and_copy_iov( 691 le16_to_cpu(qi_rsp->OutputBufferOffset), 692 le32_to_cpu(qi_rsp->OutputBufferLength), 693 &rsp_iov[i + 1], sizeof(idata->fi), (char *)&idata->fi); 694 } 695 SMB2_query_info_free(&rqst[num_rqst++]); 696 if (rc) 697 trace_smb3_query_info_compound_err(xid, tcon->tid, 698 ses->Suid, rc); 699 else 700 trace_smb3_query_info_compound_done(xid, tcon->tid, 701 ses->Suid); 702 break; 703 case SMB2_OP_POSIX_QUERY_INFO: 704 idata = in_iov[i].iov_base; 705 idata->contains_posix_file_info = true; 706 if (rc == 0 && cfile && cfile->symlink_target) { 707 idata->symlink_target = kstrdup(cfile->symlink_target, GFP_KERNEL); 708 if (!idata->symlink_target) 709 rc = -ENOMEM; 710 } 711 if (rc == 0) { 712 qi_rsp = (struct smb2_query_info_rsp *) 713 rsp_iov[i + 1].iov_base; 714 rc = smb2_validate_and_copy_iov( 715 le16_to_cpu(qi_rsp->OutputBufferOffset), 716 le32_to_cpu(qi_rsp->OutputBufferLength), 717 &rsp_iov[i + 1], sizeof(idata->posix_fi) /* add SIDs */, 718 (char *)&idata->posix_fi); 719 } 720 if (rc == 0) 721 rc = parse_posix_sids(idata, &rsp_iov[i + 1]); 722 723 SMB2_query_info_free(&rqst[num_rqst++]); 724 if (rc) 725 trace_smb3_posix_query_info_compound_err(xid, tcon->tid, 726 ses->Suid, rc); 727 else 728 trace_smb3_posix_query_info_compound_done(xid, tcon->tid, 729 ses->Suid); 730 break; 731 case SMB2_OP_DELETE: 732 if (rc) 733 trace_smb3_delete_err(xid, tcon->tid, ses->Suid, rc); 734 else { 735 /* 736 * If dentry (hence, inode) is NULL, lease break is going to 737 * take care of degrading leases on handles for deleted files. 738 */ 739 if (inode) 740 cifs_mark_open_handles_for_deleted_file(inode, full_path); 741 trace_smb3_delete_done(xid, tcon->tid, ses->Suid); 742 } 743 break; 744 case SMB2_OP_MKDIR: 745 if (rc) 746 trace_smb3_mkdir_err(xid, tcon->tid, ses->Suid, rc); 747 else 748 trace_smb3_mkdir_done(xid, tcon->tid, ses->Suid); 749 break; 750 case SMB2_OP_HARDLINK: 751 if (rc) 752 trace_smb3_hardlink_err(xid, tcon->tid, ses->Suid, rc); 753 else 754 trace_smb3_hardlink_done(xid, tcon->tid, ses->Suid); 755 SMB2_set_info_free(&rqst[num_rqst++]); 756 break; 757 case SMB2_OP_RENAME: 758 if (rc) 759 trace_smb3_rename_err(xid, tcon->tid, ses->Suid, rc); 760 else 761 trace_smb3_rename_done(xid, tcon->tid, ses->Suid); 762 SMB2_set_info_free(&rqst[num_rqst++]); 763 break; 764 case SMB2_OP_RMDIR: 765 if (rc) 766 trace_smb3_rmdir_err(xid, tcon->tid, ses->Suid, rc); 767 else 768 trace_smb3_rmdir_done(xid, tcon->tid, ses->Suid); 769 SMB2_set_info_free(&rqst[num_rqst++]); 770 break; 771 case SMB2_OP_SET_EOF: 772 if (rc) 773 trace_smb3_set_eof_err(xid, tcon->tid, ses->Suid, rc); 774 else 775 trace_smb3_set_eof_done(xid, tcon->tid, ses->Suid); 776 SMB2_set_info_free(&rqst[num_rqst++]); 777 break; 778 case SMB2_OP_SET_INFO: 779 if (rc) 780 trace_smb3_set_info_compound_err(xid, tcon->tid, 781 ses->Suid, rc); 782 else 783 trace_smb3_set_info_compound_done(xid, tcon->tid, 784 ses->Suid); 785 SMB2_set_info_free(&rqst[num_rqst++]); 786 break; 787 case SMB2_OP_SET_REPARSE: 788 if (rc) { 789 trace_smb3_set_reparse_compound_err(xid, tcon->tid, 790 ses->Suid, rc); 791 } else { 792 trace_smb3_set_reparse_compound_done(xid, tcon->tid, 793 ses->Suid); 794 } 795 SMB2_ioctl_free(&rqst[num_rqst++]); 796 break; 797 case SMB2_OP_GET_REPARSE: 798 if (!rc) { 799 iov = &rsp_iov[i + 1]; 800 idata = in_iov[i].iov_base; 801 idata->reparse.io.iov = *iov; 802 idata->reparse.io.buftype = resp_buftype[i + 1]; 803 idata->contains_posix_file_info = false; /* BB VERIFY */ 804 rbuf = reparse_buf_ptr(iov); 805 if (IS_ERR(rbuf)) { 806 rc = PTR_ERR(rbuf); 807 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 808 ses->Suid, rc); 809 } else { 810 idata->reparse.tag = le32_to_cpu(rbuf->ReparseTag); 811 trace_smb3_get_reparse_compound_done(xid, tcon->tid, 812 ses->Suid); 813 } 814 memset(iov, 0, sizeof(*iov)); 815 resp_buftype[i + 1] = CIFS_NO_BUFFER; 816 } else { 817 trace_smb3_get_reparse_compound_err(xid, tcon->tid, 818 ses->Suid, rc); 819 } 820 SMB2_ioctl_free(&rqst[num_rqst++]); 821 break; 822 case SMB2_OP_QUERY_WSL_EA: 823 if (!rc) { 824 idata = in_iov[i].iov_base; 825 idata->contains_posix_file_info = false; 826 qi_rsp = rsp_iov[i + 1].iov_base; 827 data[0] = (u8 *)qi_rsp + le16_to_cpu(qi_rsp->OutputBufferOffset); 828 size[0] = le32_to_cpu(qi_rsp->OutputBufferLength); 829 rc = check_wsl_eas(&rsp_iov[i + 1]); 830 if (!rc) { 831 memcpy(idata->wsl.eas, data[0], size[0]); 832 idata->wsl.eas_len = size[0]; 833 } 834 } 835 if (!rc) { 836 trace_smb3_query_wsl_ea_compound_done(xid, tcon->tid, 837 ses->Suid); 838 } else { 839 trace_smb3_query_wsl_ea_compound_err(xid, tcon->tid, 840 ses->Suid, rc); 841 } 842 SMB2_query_info_free(&rqst[num_rqst++]); 843 break; 844 } 845 } 846 SMB2_close_free(&rqst[num_rqst]); 847 rc = tmp_rc; 848 849 num_cmds += 2; 850 if (out_iov && out_buftype) { 851 memcpy(out_iov, rsp_iov, num_cmds * sizeof(*out_iov)); 852 memcpy(out_buftype, resp_buftype, 853 num_cmds * sizeof(*out_buftype)); 854 } else { 855 for (i = 0; i < num_cmds; i++) 856 free_rsp_buf(resp_buftype[i], rsp_iov[i].iov_base); 857 } 858 num_cmds -= 2; /* correct num_cmds as there could be a retry */ 859 kfree(vars); 860 861 if (is_replayable_error(rc) && 862 smb2_should_replay(tcon, &retries, &cur_sleep)) 863 goto replay_again; 864 865 if (cfile) 866 cifsFileInfo_put(cfile); 867 868 return rc; 869 } 870 871 static int parse_create_response(struct cifs_open_info_data *data, 872 struct cifs_sb_info *cifs_sb, 873 const char *full_path, 874 const struct kvec *iov) 875 { 876 struct smb2_create_rsp *rsp = iov->iov_base; 877 bool reparse_point = false; 878 u32 tag = 0; 879 int rc = 0; 880 881 switch (rsp->hdr.Status) { 882 case STATUS_IO_REPARSE_TAG_NOT_HANDLED: 883 reparse_point = true; 884 break; 885 case STATUS_STOPPED_ON_SYMLINK: 886 rc = smb2_parse_symlink_response(cifs_sb, iov, 887 full_path, 888 &data->symlink_target); 889 if (rc) 890 return rc; 891 tag = IO_REPARSE_TAG_SYMLINK; 892 reparse_point = true; 893 break; 894 case STATUS_SUCCESS: 895 reparse_point = !!(rsp->Flags & SMB2_CREATE_FLAG_REPARSEPOINT); 896 break; 897 } 898 data->reparse_point = reparse_point; 899 data->reparse.tag = tag; 900 return rc; 901 } 902 903 /* Check only if SMB2_OP_QUERY_WSL_EA command failed in the compound chain */ 904 static bool ea_unsupported(int *cmds, int num_cmds, 905 struct kvec *out_iov, int *out_buftype) 906 { 907 int i; 908 909 if (cmds[num_cmds - 1] != SMB2_OP_QUERY_WSL_EA) 910 return false; 911 912 for (i = 1; i < num_cmds - 1; i++) { 913 struct smb2_hdr *hdr = out_iov[i].iov_base; 914 915 if (out_buftype[i] == CIFS_NO_BUFFER || !hdr || 916 hdr->Status != STATUS_SUCCESS) 917 return false; 918 } 919 return true; 920 } 921 922 static inline void free_rsp_iov(struct kvec *iovs, int *buftype, int count) 923 { 924 int i; 925 926 for (i = 0; i < count; i++) { 927 free_rsp_buf(buftype[i], iovs[i].iov_base); 928 memset(&iovs[i], 0, sizeof(*iovs)); 929 buftype[i] = CIFS_NO_BUFFER; 930 } 931 } 932 933 int smb2_query_path_info(const unsigned int xid, 934 struct cifs_tcon *tcon, 935 struct cifs_sb_info *cifs_sb, 936 const char *full_path, 937 struct cifs_open_info_data *data) 938 { 939 struct kvec in_iov[3], out_iov[5] = {}; 940 struct cached_fid *cfid = NULL; 941 struct cifs_open_parms oparms; 942 struct cifsFileInfo *cfile; 943 __u32 create_options = 0; 944 int out_buftype[5] = {}; 945 struct smb2_hdr *hdr; 946 int num_cmds = 0; 947 int cmds[3]; 948 bool islink; 949 int rc, rc2; 950 951 data->adjust_tz = false; 952 data->reparse_point = false; 953 954 /* 955 * BB TODO: Add support for using cached root handle in SMB3.1.1 POSIX. 956 * Create SMB2_query_posix_info worker function to do non-compounded 957 * query when we already have an open file handle for this. For now this 958 * is fast enough (always using the compounded version). 959 */ 960 if (!tcon->posix_extensions) { 961 if (*full_path) { 962 rc = -ENOENT; 963 } else { 964 rc = open_cached_dir(xid, tcon, full_path, 965 cifs_sb, false, &cfid); 966 } 967 /* If it is a root and its handle is cached then use it */ 968 if (!rc) { 969 if (cfid->file_all_info_is_valid) { 970 memcpy(&data->fi, &cfid->file_all_info, 971 sizeof(data->fi)); 972 } else { 973 rc = SMB2_query_info(xid, tcon, 974 cfid->fid.persistent_fid, 975 cfid->fid.volatile_fid, 976 &data->fi); 977 } 978 close_cached_dir(cfid); 979 return rc; 980 } 981 cmds[num_cmds++] = SMB2_OP_QUERY_INFO; 982 } else { 983 cmds[num_cmds++] = SMB2_OP_POSIX_QUERY_INFO; 984 } 985 986 in_iov[0].iov_base = data; 987 in_iov[0].iov_len = sizeof(*data); 988 in_iov[1] = in_iov[0]; 989 in_iov[2] = in_iov[0]; 990 991 cifs_get_readable_path(tcon, full_path, &cfile); 992 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_READ_ATTRIBUTES, 993 FILE_OPEN, create_options, ACL_NO_MODE); 994 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 995 &oparms, in_iov, cmds, num_cmds, 996 cfile, out_iov, out_buftype, NULL); 997 hdr = out_iov[0].iov_base; 998 /* 999 * If first iov is unset, then SMB session was dropped or we've got a 1000 * cached open file (@cfile). 1001 */ 1002 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1003 goto out; 1004 1005 switch (rc) { 1006 case 0: 1007 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1008 break; 1009 case -EACCES: 1010 /* 1011 * If SMB2_OP_QUERY_INFO (called when POSIX extensions are not used) failed with 1012 * STATUS_ACCESS_DENIED then it means that caller does not have permission to 1013 * open the path with FILE_READ_ATTRIBUTES access and therefore cannot issue 1014 * SMB2_OP_QUERY_INFO command. 1015 * 1016 * There is an alternative way how to query limited information about path but still 1017 * suitable for stat() syscall. SMB2 OPEN/CREATE operation returns in its successful 1018 * response subset of query information. 1019 * 1020 * So try to open the path without FILE_READ_ATTRIBUTES but with MAXIMUM_ALLOWED 1021 * access which will grant the maximum possible access to the file and the response 1022 * will contain required query information for stat() syscall. 1023 */ 1024 1025 if (tcon->posix_extensions) 1026 break; 1027 1028 num_cmds = 1; 1029 cmds[0] = SMB2_OP_OPEN_QUERY; 1030 in_iov[0].iov_base = data; 1031 in_iov[0].iov_len = sizeof(*data); 1032 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, MAXIMUM_ALLOWED, 1033 FILE_OPEN, create_options, ACL_NO_MODE); 1034 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1035 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1036 &oparms, in_iov, cmds, num_cmds, 1037 cfile, out_iov, out_buftype, NULL); 1038 1039 hdr = out_iov[0].iov_base; 1040 if (!hdr || out_buftype[0] == CIFS_NO_BUFFER) 1041 goto out; 1042 1043 if (!rc) 1044 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1045 break; 1046 case -EOPNOTSUPP: 1047 /* 1048 * BB TODO: When support for special files added to Samba 1049 * re-verify this path. 1050 */ 1051 rc = parse_create_response(data, cifs_sb, full_path, &out_iov[0]); 1052 if (rc || !data->reparse_point) 1053 goto out; 1054 1055 /* 1056 * Skip SMB2_OP_GET_REPARSE if symlink already parsed in create 1057 * response. 1058 */ 1059 if (data->reparse.tag != IO_REPARSE_TAG_SYMLINK) 1060 cmds[num_cmds++] = SMB2_OP_GET_REPARSE; 1061 if (!tcon->posix_extensions) 1062 cmds[num_cmds++] = SMB2_OP_QUERY_WSL_EA; 1063 1064 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1065 FILE_READ_ATTRIBUTES | 1066 FILE_READ_EA | SYNCHRONIZE, 1067 FILE_OPEN, create_options | 1068 OPEN_REPARSE_POINT, ACL_NO_MODE); 1069 cifs_get_readable_path(tcon, full_path, &cfile); 1070 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1071 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, 1072 &oparms, in_iov, cmds, num_cmds, 1073 cfile, out_iov, out_buftype, NULL); 1074 if (rc && ea_unsupported(cmds, num_cmds, 1075 out_iov, out_buftype)) { 1076 if (data->reparse.tag != IO_REPARSE_TAG_LX_BLK && 1077 data->reparse.tag != IO_REPARSE_TAG_LX_CHR) 1078 rc = 0; 1079 else 1080 rc = -EOPNOTSUPP; 1081 } 1082 1083 if (data->reparse.tag == IO_REPARSE_TAG_SYMLINK && !rc) { 1084 bool directory = le32_to_cpu(data->fi.Attributes) & ATTR_DIRECTORY; 1085 rc = smb2_fix_symlink_target_type(&data->symlink_target, directory, cifs_sb); 1086 } 1087 break; 1088 case -EREMOTE: 1089 break; 1090 default: 1091 if (hdr->Status != STATUS_OBJECT_NAME_INVALID) 1092 break; 1093 rc2 = cifs_inval_name_dfs_link_error(xid, tcon, cifs_sb, 1094 full_path, &islink); 1095 if (rc2) { 1096 rc = rc2; 1097 goto out; 1098 } 1099 if (islink) 1100 rc = -EREMOTE; 1101 } 1102 1103 out: 1104 free_rsp_iov(out_iov, out_buftype, ARRAY_SIZE(out_iov)); 1105 return rc; 1106 } 1107 1108 int 1109 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode, 1110 struct cifs_tcon *tcon, const char *name, 1111 struct cifs_sb_info *cifs_sb) 1112 { 1113 struct cifs_open_parms oparms; 1114 1115 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1116 FILE_CREATE, CREATE_NOT_FILE, mode); 1117 return smb2_compound_op(xid, tcon, cifs_sb, 1118 name, &oparms, NULL, 1119 &(int){SMB2_OP_MKDIR}, 1, 1120 NULL, NULL, NULL, NULL); 1121 } 1122 1123 void 1124 smb2_mkdir_setinfo(struct inode *inode, const char *name, 1125 struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon, 1126 const unsigned int xid) 1127 { 1128 struct cifs_open_parms oparms; 1129 FILE_BASIC_INFO data = {}; 1130 struct cifsInodeInfo *cifs_i; 1131 struct cifsFileInfo *cfile; 1132 struct kvec in_iov; 1133 u32 dosattrs; 1134 int tmprc; 1135 1136 in_iov.iov_base = &data; 1137 in_iov.iov_len = sizeof(data); 1138 cifs_i = CIFS_I(inode); 1139 dosattrs = cifs_i->cifsAttrs | ATTR_READONLY; 1140 data.Attributes = cpu_to_le32(dosattrs); 1141 cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile); 1142 oparms = CIFS_OPARMS(cifs_sb, tcon, name, FILE_WRITE_ATTRIBUTES, 1143 FILE_CREATE, CREATE_NOT_FILE, ACL_NO_MODE); 1144 tmprc = smb2_compound_op(xid, tcon, cifs_sb, name, 1145 &oparms, &in_iov, 1146 &(int){SMB2_OP_SET_INFO}, 1, 1147 cfile, NULL, NULL, NULL); 1148 if (tmprc == 0) 1149 cifs_i->cifsAttrs = dosattrs; 1150 } 1151 1152 int 1153 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1154 struct cifs_sb_info *cifs_sb) 1155 { 1156 struct cifs_open_parms oparms; 1157 1158 drop_cached_dir_by_name(xid, tcon, name, cifs_sb); 1159 oparms = CIFS_OPARMS(cifs_sb, tcon, name, DELETE, 1160 FILE_OPEN, CREATE_NOT_FILE, ACL_NO_MODE); 1161 return smb2_compound_op(xid, tcon, cifs_sb, 1162 name, &oparms, NULL, 1163 &(int){SMB2_OP_RMDIR}, 1, 1164 NULL, NULL, NULL, NULL); 1165 } 1166 1167 int 1168 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name, 1169 struct cifs_sb_info *cifs_sb, struct dentry *dentry) 1170 { 1171 struct cifs_open_parms oparms; 1172 1173 oparms = CIFS_OPARMS(cifs_sb, tcon, name, 1174 DELETE, FILE_OPEN, 1175 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT, 1176 ACL_NO_MODE); 1177 int rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms, 1178 NULL, &(int){SMB2_OP_DELETE}, 1, 1179 NULL, NULL, NULL, dentry); 1180 if (rc == -EINVAL) { 1181 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1182 rc = smb2_compound_op(xid, tcon, cifs_sb, name, &oparms, 1183 NULL, &(int){SMB2_OP_DELETE}, 1, 1184 NULL, NULL, NULL, NULL); 1185 } 1186 return rc; 1187 } 1188 1189 static int smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon, 1190 const char *from_name, const char *to_name, 1191 struct cifs_sb_info *cifs_sb, 1192 __u32 create_options, __u32 access, 1193 int command, struct cifsFileInfo *cfile, 1194 struct dentry *dentry) 1195 { 1196 struct cifs_open_parms oparms; 1197 struct kvec in_iov; 1198 __le16 *smb2_to_name = NULL; 1199 int rc; 1200 1201 smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb); 1202 if (smb2_to_name == NULL) { 1203 rc = -ENOMEM; 1204 goto smb2_rename_path; 1205 } 1206 in_iov.iov_base = smb2_to_name; 1207 in_iov.iov_len = 2 * UniStrnlen((wchar_t *)smb2_to_name, PATH_MAX); 1208 oparms = CIFS_OPARMS(cifs_sb, tcon, from_name, access, FILE_OPEN, 1209 create_options, ACL_NO_MODE); 1210 rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, 1211 &oparms, &in_iov, &command, 1, 1212 cfile, NULL, NULL, dentry); 1213 smb2_rename_path: 1214 kfree(smb2_to_name); 1215 return rc; 1216 } 1217 1218 int smb2_rename_path(const unsigned int xid, 1219 struct cifs_tcon *tcon, 1220 struct dentry *source_dentry, 1221 const char *from_name, const char *to_name, 1222 struct cifs_sb_info *cifs_sb) 1223 { 1224 struct cifsFileInfo *cfile; 1225 __u32 co = file_create_options(source_dentry); 1226 1227 drop_cached_dir_by_name(xid, tcon, from_name, cifs_sb); 1228 cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile); 1229 1230 int rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1231 co, DELETE, SMB2_OP_RENAME, cfile, source_dentry); 1232 if (rc == -EINVAL) { 1233 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1234 cifs_get_writable_path(tcon, from_name, 1235 FIND_WR_WITH_DELETE, &cfile); 1236 rc = smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb, 1237 co, DELETE, SMB2_OP_RENAME, cfile, NULL); 1238 } 1239 return rc; 1240 } 1241 1242 int smb2_create_hardlink(const unsigned int xid, 1243 struct cifs_tcon *tcon, 1244 struct dentry *source_dentry, 1245 const char *from_name, const char *to_name, 1246 struct cifs_sb_info *cifs_sb) 1247 { 1248 __u32 co = file_create_options(source_dentry); 1249 1250 return smb2_set_path_attr(xid, tcon, from_name, to_name, 1251 cifs_sb, co, FILE_READ_ATTRIBUTES, 1252 SMB2_OP_HARDLINK, NULL, NULL); 1253 } 1254 1255 int 1256 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon, 1257 const char *full_path, __u64 size, 1258 struct cifs_sb_info *cifs_sb, bool set_alloc, 1259 struct dentry *dentry) 1260 { 1261 struct cifs_open_parms oparms; 1262 struct cifsFileInfo *cfile; 1263 struct kvec in_iov; 1264 __le64 eof = cpu_to_le64(size); 1265 int rc; 1266 1267 in_iov.iov_base = &eof; 1268 in_iov.iov_len = sizeof(eof); 1269 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1270 1271 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_DATA, 1272 FILE_OPEN, 0, ACL_NO_MODE); 1273 rc = smb2_compound_op(xid, tcon, cifs_sb, 1274 full_path, &oparms, &in_iov, 1275 &(int){SMB2_OP_SET_EOF}, 1, 1276 cfile, NULL, NULL, dentry); 1277 if (rc == -EINVAL) { 1278 cifs_dbg(FYI, "invalid lease key, resending request without lease"); 1279 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1280 rc = smb2_compound_op(xid, tcon, cifs_sb, 1281 full_path, &oparms, &in_iov, 1282 &(int){SMB2_OP_SET_EOF}, 1, 1283 cfile, NULL, NULL, NULL); 1284 } 1285 return rc; 1286 } 1287 1288 int 1289 smb2_set_file_info(struct inode *inode, const char *full_path, 1290 FILE_BASIC_INFO *buf, const unsigned int xid) 1291 { 1292 struct cifs_open_parms oparms; 1293 struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); 1294 struct tcon_link *tlink; 1295 struct cifs_tcon *tcon; 1296 struct cifsFileInfo *cfile; 1297 struct kvec in_iov = { .iov_base = buf, .iov_len = sizeof(*buf), }; 1298 int rc; 1299 1300 if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) && 1301 (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) && 1302 (buf->Attributes == 0)) 1303 return 0; /* would be a no op, no sense sending this */ 1304 1305 tlink = cifs_sb_tlink(cifs_sb); 1306 if (IS_ERR(tlink)) 1307 return PTR_ERR(tlink); 1308 tcon = tlink_tcon(tlink); 1309 1310 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1311 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, FILE_WRITE_ATTRIBUTES, 1312 FILE_OPEN, 0, ACL_NO_MODE); 1313 rc = smb2_compound_op(xid, tcon, cifs_sb, 1314 full_path, &oparms, &in_iov, 1315 &(int){SMB2_OP_SET_INFO}, 1, 1316 cfile, NULL, NULL, NULL); 1317 cifs_put_tlink(tlink); 1318 return rc; 1319 } 1320 1321 struct inode *smb2_get_reparse_inode(struct cifs_open_info_data *data, 1322 struct super_block *sb, 1323 const unsigned int xid, 1324 struct cifs_tcon *tcon, 1325 const char *full_path, 1326 bool directory, 1327 struct kvec *reparse_iov, 1328 struct kvec *xattr_iov) 1329 { 1330 struct cifs_open_parms oparms; 1331 struct cifs_sb_info *cifs_sb = CIFS_SB(sb); 1332 struct cifsFileInfo *cfile; 1333 struct inode *new = NULL; 1334 int out_buftype[4] = {}; 1335 struct kvec out_iov[4] = {}; 1336 struct kvec in_iov[2]; 1337 int cmds[2]; 1338 int rc; 1339 int i; 1340 1341 /* 1342 * If server filesystem does not support reparse points then do not 1343 * attempt to create reparse point. This will prevent creating unusable 1344 * empty object on the server. 1345 */ 1346 if (!(le32_to_cpu(tcon->fsAttrInfo.Attributes) & FILE_SUPPORTS_REPARSE_POINTS)) 1347 return ERR_PTR(-EOPNOTSUPP); 1348 1349 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1350 SYNCHRONIZE | DELETE | 1351 FILE_READ_ATTRIBUTES | 1352 FILE_WRITE_ATTRIBUTES, 1353 FILE_CREATE, 1354 (directory ? CREATE_NOT_FILE : CREATE_NOT_DIR) | OPEN_REPARSE_POINT, 1355 ACL_NO_MODE); 1356 if (xattr_iov) 1357 oparms.ea_cctx = xattr_iov; 1358 1359 cmds[0] = SMB2_OP_SET_REPARSE; 1360 in_iov[0] = *reparse_iov; 1361 in_iov[1].iov_base = data; 1362 in_iov[1].iov_len = sizeof(*data); 1363 1364 if (tcon->posix_extensions) { 1365 cmds[1] = SMB2_OP_POSIX_QUERY_INFO; 1366 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1367 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, 1368 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL); 1369 if (!rc) { 1370 rc = smb311_posix_get_inode_info(&new, full_path, 1371 data, sb, xid); 1372 } 1373 } else { 1374 cmds[1] = SMB2_OP_QUERY_INFO; 1375 cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile); 1376 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path, &oparms, 1377 in_iov, cmds, 2, cfile, out_iov, out_buftype, NULL); 1378 if (!rc) { 1379 rc = cifs_get_inode_info(&new, full_path, 1380 data, sb, xid, NULL); 1381 } 1382 } 1383 1384 1385 /* 1386 * If CREATE was successful but SMB2_OP_SET_REPARSE failed then 1387 * remove the intermediate object created by CREATE. Otherwise 1388 * empty object stay on the server when reparse call failed. 1389 */ 1390 if (rc && 1391 out_iov[0].iov_base != NULL && out_buftype[0] != CIFS_NO_BUFFER && 1392 ((struct smb2_hdr *)out_iov[0].iov_base)->Status == STATUS_SUCCESS && 1393 (out_iov[1].iov_base == NULL || out_buftype[1] == CIFS_NO_BUFFER || 1394 ((struct smb2_hdr *)out_iov[1].iov_base)->Status != STATUS_SUCCESS)) 1395 smb2_unlink(xid, tcon, full_path, cifs_sb, NULL); 1396 1397 for (i = 0; i < ARRAY_SIZE(out_buftype); i++) 1398 free_rsp_buf(out_buftype[i], out_iov[i].iov_base); 1399 1400 return rc ? ERR_PTR(rc) : new; 1401 } 1402 1403 int smb2_query_reparse_point(const unsigned int xid, 1404 struct cifs_tcon *tcon, 1405 struct cifs_sb_info *cifs_sb, 1406 const char *full_path, 1407 u32 *tag, struct kvec *rsp, 1408 int *rsp_buftype) 1409 { 1410 struct cifs_open_parms oparms; 1411 struct cifs_open_info_data data = {}; 1412 struct cifsFileInfo *cfile; 1413 struct kvec in_iov = { .iov_base = &data, .iov_len = sizeof(data), }; 1414 int rc; 1415 1416 cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path); 1417 1418 cifs_get_readable_path(tcon, full_path, &cfile); 1419 oparms = CIFS_OPARMS(cifs_sb, tcon, full_path, 1420 FILE_READ_ATTRIBUTES | FILE_READ_EA | SYNCHRONIZE, 1421 FILE_OPEN, OPEN_REPARSE_POINT, ACL_NO_MODE); 1422 rc = smb2_compound_op(xid, tcon, cifs_sb, 1423 full_path, &oparms, &in_iov, 1424 &(int){SMB2_OP_GET_REPARSE}, 1, 1425 cfile, NULL, NULL, NULL); 1426 if (rc) 1427 goto out; 1428 1429 *tag = data.reparse.tag; 1430 *rsp = data.reparse.io.iov; 1431 *rsp_buftype = data.reparse.io.buftype; 1432 memset(&data.reparse.io.iov, 0, sizeof(data.reparse.io.iov)); 1433 data.reparse.io.buftype = CIFS_NO_BUFFER; 1434 out: 1435 cifs_free_open_info(&data); 1436 return rc; 1437 } 1438