fs/cifs/smb2inode.c

   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
  27 static void
  28 free_set_inf_compound(struct smb_rqst *rqst)
  29 {
  30         if (rqst[1].rq_iov)
  31                 SMB2_set_info_free(&rqst[1]);
  32         if (rqst[2].rq_iov)
  33                 SMB2_close_free(&rqst[2]);
  34 }
  35
  36
  37 struct cop_vars {
  38         struct cifs_open_parms oparms;
  39         struct kvec rsp_iov[3];
  40         struct smb_rqst rqst[3];
  41         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  42         struct kvec qi_iov[1];
  43         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  44         struct kvec close_iov[1];
  45         struct smb2_file_rename_info rename_info;
  46         struct smb2_file_link_info link_info;
  47 };
  48
  49 /*
  50  * note: If cfile is passed, the reference to it is dropped here.
  51  * So make sure that you do not reuse cfile after return from this func.
  52  */
  53 static int
  54 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  55                  struct cifs_sb_info *cifs_sb, const char *full_path,
  56                  __u32 desired_access, __u32 create_disposition,
  57                  __u32 create_options, umode_t mode, void *ptr, int command,
  58                  struct cifsFileInfo *cfile)
  59 {
  60         struct cop_vars *vars = NULL;
  61         struct kvec *rsp_iov;
  62         struct smb_rqst *rqst;
  63         int rc;
  64         __le16 *utf16_path = NULL;
  65         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  66         struct cifs_fid fid;
  67         struct cifs_ses *ses = tcon->ses;
  68         struct TCP_Server_Info *server;
  69         int num_rqst = 0;
  70         int resp_buftype[3];
  71         struct smb2_query_info_rsp *qi_rsp = NULL;
  72         int flags = 0;
  73         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  74         unsigned int size[2];
  75         void *data[2];
  76         int len;
  77
  78         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  79         if (vars == NULL)
  80                 return -ENOMEM;
  81         rqst = &vars->rqst[0];
  82         rsp_iov = &vars->rsp_iov[0];
  83
  84         server = cifs_pick_channel(ses);
  85
  86         if (smb3_encryption_required(tcon))
  87                 flags |= CIFS_TRANSFORM_REQ;
  88
  89         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  90
  91         /* We already have a handle so we can skip the open */
  92         if (cfile)
  93                 goto after_open;
  94
  95         /* Open */
  96         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
  97         if (!utf16_path) {
  98                 rc = -ENOMEM;
  99                 goto finished;
 100         }
 101
 102         vars->oparms.tcon = tcon;
 103         vars->oparms.desired_access = desired_access;
 104         vars->oparms.disposition = create_disposition;
 105         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 106         vars->oparms.fid = &fid;
 107         vars->oparms.reconnect = false;
 108         vars->oparms.mode = mode;
 109         vars->oparms.cifs_sb = cifs_sb;
 110
 111         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 112         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 113         rc = SMB2_open_init(tcon, server,
 114                             &rqst[num_rqst], &oplock, &vars->oparms,
 115                             utf16_path);
 116         kfree(utf16_path);
 117         if (rc)
 118                 goto finished;
 119
 120         smb2_set_next_command(tcon, &rqst[num_rqst]);
 121  after_open:
 122         num_rqst++;
 123         rc = 0;
 124
 125         /* Operation */
 126         switch (command) {
 127         case SMB2_OP_QUERY_INFO:
 128                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 129                 rqst[num_rqst].rq_nvec = 1;
 130
 131                 if (cfile)
 132                         rc = SMB2_query_info_init(tcon, server,
 133                                 &rqst[num_rqst],
 134                                 cfile->fid.persistent_fid,
 135                                 cfile->fid.volatile_fid,
 136                                 FILE_ALL_INFORMATION,
 137                                 SMB2_O_INFO_FILE, 0,
 138                                 sizeof(struct smb2_file_all_info) +
 139                                           PATH_MAX * 2, 0, NULL);
 140                 else {
 141                         rc = SMB2_query_info_init(tcon, server,
 142                                 &rqst[num_rqst],
 143                                 COMPOUND_FID,
 144                                 COMPOUND_FID,
 145                                 FILE_ALL_INFORMATION,
 146                                 SMB2_O_INFO_FILE, 0,
 147                                 sizeof(struct smb2_file_all_info) +
 148                                           PATH_MAX * 2, 0, NULL);
 149                         if (!rc) {
 150                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 151                                 smb2_set_related(&rqst[num_rqst]);
 152                         }
 153                 }
 154
 155                 if (rc)
 156                         goto finished;
 157                 num_rqst++;
 158                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 159                                                      full_path);
 160                 break;
 161         case SMB2_OP_POSIX_QUERY_INFO:
 162                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 163                 rqst[num_rqst].rq_nvec = 1;
 164
 165                 if (cfile)
 166                         rc = SMB2_query_info_init(tcon, server,
 167                                 &rqst[num_rqst],
 168                                 cfile->fid.persistent_fid,
 169                                 cfile->fid.volatile_fid,
 170                                 SMB_FIND_FILE_POSIX_INFO,
 171                                 SMB2_O_INFO_FILE, 0,
 172                                 /* TBD: fix following to allow for longer SIDs */
 173                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 174                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 175                 else {
 176                         rc = SMB2_query_info_init(tcon, server,
 177                                 &rqst[num_rqst],
 178                                 COMPOUND_FID,
 179                                 COMPOUND_FID,
 180                                 SMB_FIND_FILE_POSIX_INFO,
 181                                 SMB2_O_INFO_FILE, 0,
 182                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 183                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 184                         if (!rc) {
 185                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 186                                 smb2_set_related(&rqst[num_rqst]);
 187                         }
 188                 }
 189
 190                 if (rc)
 191                         goto finished;
 192                 num_rqst++;
 193                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 194                 break;
 195         case SMB2_OP_DELETE:
 196                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 197                 break;
 198         case SMB2_OP_MKDIR:
 199                 /*
 200                  * Directories are created through parameters in the
 201                  * SMB2_open() call.
 202                  */
 203                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 204                 break;
 205         case SMB2_OP_RMDIR:
 206                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 207                 rqst[num_rqst].rq_nvec = 1;
 208
 209                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 210                 data[0] = &delete_pending[0];
 211
 212                 rc = SMB2_set_info_init(tcon, server,
 213                                         &rqst[num_rqst], COMPOUND_FID,
 214                                         COMPOUND_FID, current->tgid,
 215                                         FILE_DISPOSITION_INFORMATION,
 216                                         SMB2_O_INFO_FILE, 0, data, size);
 217                 if (rc)
 218                         goto finished;
 219                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 220                 smb2_set_related(&rqst[num_rqst++]);
 221                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 222                 break;
 223         case SMB2_OP_SET_EOF:
 224                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 225                 rqst[num_rqst].rq_nvec = 1;
 226
 227                 size[0] = 8; /* sizeof __le64 */
 228                 data[0] = ptr;
 229
 230                 rc = SMB2_set_info_init(tcon, server,
 231                                         &rqst[num_rqst], COMPOUND_FID,
 232                                         COMPOUND_FID, current->tgid,
 233                                         FILE_END_OF_FILE_INFORMATION,
 234                                         SMB2_O_INFO_FILE, 0, data, size);
 235                 if (rc)
 236                         goto finished;
 237                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 238                 smb2_set_related(&rqst[num_rqst++]);
 239                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 240                 break;
 241         case SMB2_OP_SET_INFO:
 242                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 243                 rqst[num_rqst].rq_nvec = 1;
 244
 245
 246                 size[0] = sizeof(FILE_BASIC_INFO);
 247                 data[0] = ptr;
 248
 249                 if (cfile)
 250                         rc = SMB2_set_info_init(tcon, server,
 251                                 &rqst[num_rqst],
 252                                 cfile->fid.persistent_fid,
 253                                 cfile->fid.volatile_fid, current->tgid,
 254                                 FILE_BASIC_INFORMATION,
 255                                 SMB2_O_INFO_FILE, 0, data, size);
 256                 else {
 257                         rc = SMB2_set_info_init(tcon, server,
 258                                 &rqst[num_rqst],
 259                                 COMPOUND_FID,
 260                                 COMPOUND_FID, current->tgid,
 261                                 FILE_BASIC_INFORMATION,
 262                                 SMB2_O_INFO_FILE, 0, data, size);
 263                         if (!rc) {
 264                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 265                                 smb2_set_related(&rqst[num_rqst]);
 266                         }
 267                 }
 268
 269                 if (rc)
 270                         goto finished;
 271                 num_rqst++;
 272                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 273                                                    full_path);
 274                 break;
 275         case SMB2_OP_RENAME:
 276                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 277                 rqst[num_rqst].rq_nvec = 2;
 278
 279                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 280
 281                 vars->rename_info.ReplaceIfExists = 1;
 282                 vars->rename_info.RootDirectory = 0;
 283                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 284
 285                 size[0] = sizeof(struct smb2_file_rename_info);
 286                 data[0] = &vars->rename_info;
 287
 288                 size[1] = len + 2 /* null */;
 289                 data[1] = (__le16 *)ptr;
 290
 291                 if (cfile)
 292                         rc = SMB2_set_info_init(tcon, server,
 293                                                 &rqst[num_rqst],
 294                                                 cfile->fid.persistent_fid,
 295                                                 cfile->fid.volatile_fid,
 296                                         current->tgid, FILE_RENAME_INFORMATION,
 297                                         SMB2_O_INFO_FILE, 0, data, size);
 298                 else {
 299                         rc = SMB2_set_info_init(tcon, server,
 300                                         &rqst[num_rqst],
 301                                         COMPOUND_FID, COMPOUND_FID,
 302                                         current->tgid, FILE_RENAME_INFORMATION,
 303                                         SMB2_O_INFO_FILE, 0, data, size);
 304                         if (!rc) {
 305                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 306                                 smb2_set_related(&rqst[num_rqst]);
 307                         }
 308                 }
 309                 if (rc)
 310                         goto finished;
 311                 num_rqst++;
 312                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 313                 break;
 314         case SMB2_OP_HARDLINK:
 315                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 316                 rqst[num_rqst].rq_nvec = 2;
 317
 318                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 319
 320                 vars->link_info.ReplaceIfExists = 0;
 321                 vars->link_info.RootDirectory = 0;
 322                 vars->link_info.FileNameLength = cpu_to_le32(len);
 323
 324                 size[0] = sizeof(struct smb2_file_link_info);
 325                 data[0] = &vars->link_info;
 326
 327                 size[1] = len + 2 /* null */;
 328                 data[1] = (__le16 *)ptr;
 329
 330                 rc = SMB2_set_info_init(tcon, server,
 331                                         &rqst[num_rqst], COMPOUND_FID,
 332                                         COMPOUND_FID, current->tgid,
 333                                         FILE_LINK_INFORMATION,
 334                                         SMB2_O_INFO_FILE, 0, data, size);
 335                 if (rc)
 336                         goto finished;
 337                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 338                 smb2_set_related(&rqst[num_rqst++]);
 339                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 340                 break;
 341         default:
 342                 cifs_dbg(VFS, "Invalid command\n");
 343                 rc = -EINVAL;
 344         }
 345         if (rc)
 346                 goto finished;
 347
 348         /* We already have a handle so we can skip the close */
 349         if (cfile)
 350                 goto after_close;
 351         /* Close */
 352         flags |= CIFS_CP_CREATE_CLOSE_OP;
 353         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 354         rqst[num_rqst].rq_nvec = 1;
 355         rc = SMB2_close_init(tcon, server,
 356                              &rqst[num_rqst], COMPOUND_FID,
 357                              COMPOUND_FID, false);
 358         smb2_set_related(&rqst[num_rqst]);
 359         if (rc)
 360                 goto finished;
 361  after_close:
 362         num_rqst++;
 363
 364         if (cfile) {
 365                 rc = compound_send_recv(xid, ses, server,
 366                                         flags, num_rqst - 2,
 367                                         &rqst[1], &resp_buftype[1],
 368                                         &rsp_iov[1]);
 369         } else
 370                 rc = compound_send_recv(xid, ses, server,
 371                                         flags, num_rqst,
 372                                         rqst, resp_buftype,
 373                                         rsp_iov);
 374
 375  finished:
 376         if (cfile)
 377                 cifsFileInfo_put(cfile);
 378
 379         SMB2_open_free(&rqst[0]);
 380         if (rc == -EREMCHG) {
 381                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 382                 tcon->need_reconnect = true;
 383         }
 384
 385         switch (command) {
 386         case SMB2_OP_QUERY_INFO:
 387                 if (rc == 0) {
 388                         qi_rsp = (struct smb2_query_info_rsp *)
 389                                 rsp_iov[1].iov_base;
 390                         rc = smb2_validate_and_copy_iov(
 391                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 392                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 393                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 394                                 ptr);
 395                 }
 396                 if (rqst[1].rq_iov)
 397                         SMB2_query_info_free(&rqst[1]);
 398                 if (rqst[2].rq_iov)
 399                         SMB2_close_free(&rqst[2]);
 400                 if (rc)
 401                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 402                                                 tcon->tid, rc);
 403                 else
 404                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 405                                                 tcon->tid);
 406                 break;
 407         case SMB2_OP_POSIX_QUERY_INFO:
 408                 if (rc == 0) {
 409                         qi_rsp = (struct smb2_query_info_rsp *)
 410                                 rsp_iov[1].iov_base;
 411                         rc = smb2_validate_and_copy_iov(
 412                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 413                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 414                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 415                 }
 416                 if (rqst[1].rq_iov)
 417                         SMB2_query_info_free(&rqst[1]);
 418                 if (rqst[2].rq_iov)
 419                         SMB2_close_free(&rqst[2]);
 420                 if (rc)
 421                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 422                 else
 423                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 424                 break;
 425         case SMB2_OP_DELETE:
 426                 if (rc)
 427                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 428                 else
 429                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 430                 if (rqst[1].rq_iov)
 431                         SMB2_close_free(&rqst[1]);
 432                 break;
 433         case SMB2_OP_MKDIR:
 434                 if (rc)
 435                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 436                 else
 437                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 438                 if (rqst[1].rq_iov)
 439                         SMB2_close_free(&rqst[1]);
 440                 break;
 441         case SMB2_OP_HARDLINK:
 442                 if (rc)
 443                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 444                 else
 445                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 446                 free_set_inf_compound(rqst);
 447                 break;
 448         case SMB2_OP_RENAME:
 449                 if (rc)
 450                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 451                 else
 452                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 453                 free_set_inf_compound(rqst);
 454                 break;
 455         case SMB2_OP_RMDIR:
 456                 if (rc)
 457                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 458                 else
 459                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 460                 free_set_inf_compound(rqst);
 461                 break;
 462         case SMB2_OP_SET_EOF:
 463                 if (rc)
 464                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 465                 else
 466                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 467                 free_set_inf_compound(rqst);
 468                 break;
 469         case SMB2_OP_SET_INFO:
 470                 if (rc)
 471                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 472                                                 tcon->tid, rc);
 473                 else
 474                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 475                                                 tcon->tid);
 476                 free_set_inf_compound(rqst);
 477                 break;
 478         }
 479         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 480         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 481         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 482         kfree(vars);
 483         return rc;
 484 }
 485
 486 void
 487 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 488 {
 489         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 490         dst->CurrentByteOffset = src->CurrentByteOffset;
 491         dst->Mode = src->Mode;
 492         dst->AlignmentRequirement = src->AlignmentRequirement;
 493         dst->IndexNumber1 = 0; /* we don't use it */
 494 }
 495
 496 int
 497 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 498                      struct cifs_sb_info *cifs_sb, const char *full_path,
 499                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 500 {
 501         int rc;
 502         struct smb2_file_all_info *smb2_data;
 503         __u32 create_options = 0;
 504         struct cifsFileInfo *cfile;
 505         struct cached_fid *cfid = NULL;
 506
 507         *adjust_tz = false;
 508         *reparse = false;
 509
 510         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 511                             GFP_KERNEL);
 512         if (smb2_data == NULL)
 513                 return -ENOMEM;
 514
 515         if (strcmp(full_path, ""))
 516                 rc = -ENOENT;
 517         else
 518                 rc = open_cached_dir(xid, tcon, full_path, cifs_sb, &cfid);
 519         /* If it is a root and its handle is cached then use it */
 520         if (!rc) {
 521                 if (tcon->crfid.file_all_info_is_valid) {
 522                         move_smb2_info_to_cifs(data,
 523                                                &tcon->crfid.file_all_info);
 524                 } else {
 525                         rc = SMB2_query_info(xid, tcon,
 526                                              cfid->fid->persistent_fid,
 527                                              cfid->fid->volatile_fid, smb2_data);
 528                         if (!rc)
 529                                 move_smb2_info_to_cifs(data, smb2_data);
 530                 }
 531                 close_cached_dir(cfid);
 532                 goto out;
 533         }
 534
 535         cifs_get_readable_path(tcon, full_path, &cfile);
 536         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 537                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 538                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 539         if (rc == -EOPNOTSUPP) {
 540                 *reparse = true;
 541                 create_options |= OPEN_REPARSE_POINT;
 542
 543                 /* Failed on a symbolic link - query a reparse point info */
 544                 cifs_get_readable_path(tcon, full_path, &cfile);
 545                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 546                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 547                                       create_options, ACL_NO_MODE,
 548                                       smb2_data, SMB2_OP_QUERY_INFO, cfile);
 549         }
 550         if (rc)
 551                 goto out;
 552
 553         move_smb2_info_to_cifs(data, smb2_data);
 554 out:
 555         kfree(smb2_data);
 556         return rc;
 557 }
 558
 559
 560 int
 561 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 562                      struct cifs_sb_info *cifs_sb, const char *full_path,
 563                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 564 {
 565         int rc;
 566         __u32 create_options = 0;
 567         struct cifsFileInfo *cfile;
 568         struct smb311_posix_qinfo *smb2_data;
 569
 570         *adjust_tz = false;
 571         *reparse = false;
 572
 573         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 574         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 575                             GFP_KERNEL);
 576         if (smb2_data == NULL)
 577                 return -ENOMEM;
 578
 579         /*
 580          * BB TODO: Add support for using the cached root handle.
 581          * Create SMB2_query_posix_info worker function to do non-compounded query
 582          * when we already have an open file handle for this. For now this is fast enough
 583          * (always using the compounded version).
 584          */
 585
 586         cifs_get_readable_path(tcon, full_path, &cfile);
 587         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 588                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 589                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 590         if (rc == -EOPNOTSUPP) {
 591                 /* BB TODO: When support for special files added to Samba re-verify this path */
 592                 *reparse = true;
 593                 create_options |= OPEN_REPARSE_POINT;
 594
 595                 /* Failed on a symbolic link - query a reparse point info */
 596                 cifs_get_readable_path(tcon, full_path, &cfile);
 597                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 598                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 599                                       create_options, ACL_NO_MODE,
 600                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 601         }
 602         if (rc)
 603                 goto out;
 604
 605          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 606         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 607
 608 out:
 609         kfree(smb2_data);
 610         return rc;
 611 }
 612
 613 int
 614 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 615            struct cifs_tcon *tcon, const char *name,
 616            struct cifs_sb_info *cifs_sb)
 617 {
 618         return smb2_compound_op(xid, tcon, cifs_sb, name,
 619                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 620                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 621                                 NULL);
 622 }
 623
 624 void
 625 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 626                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 627                    const unsigned int xid)
 628 {
 629         FILE_BASIC_INFO data;
 630         struct cifsInodeInfo *cifs_i;
 631         struct cifsFileInfo *cfile;
 632         u32 dosattrs;
 633         int tmprc;
 634
 635         memset(&data, 0, sizeof(data));
 636         cifs_i = CIFS_I(inode);
 637         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 638         data.Attributes = cpu_to_le32(dosattrs);
 639         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 640         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 641                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 642                                  CREATE_NOT_FILE, ACL_NO_MODE,
 643                                  &data, SMB2_OP_SET_INFO, cfile);
 644         if (tmprc == 0)
 645                 cifs_i->cifsAttrs = dosattrs;
 646 }
 647
 648 int
 649 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 650            struct cifs_sb_info *cifs_sb)
 651 {
 652         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 653                                 CREATE_NOT_FILE, ACL_NO_MODE,
 654                                 NULL, SMB2_OP_RMDIR, NULL);
 655 }
 656
 657 int
 658 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 659             struct cifs_sb_info *cifs_sb)
 660 {
 661         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 662                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 663                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 664 }
 665
 666 static int
 667 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 668                    const char *from_name, const char *to_name,
 669                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 670                    struct cifsFileInfo *cfile)
 671 {
 672         __le16 *smb2_to_name = NULL;
 673         int rc;
 674
 675         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 676         if (smb2_to_name == NULL) {
 677                 rc = -ENOMEM;
 678                 goto smb2_rename_path;
 679         }
 680         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 681                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 682                               command, cfile);
 683 smb2_rename_path:
 684         kfree(smb2_to_name);
 685         return rc;
 686 }
 687
 688 int
 689 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 690                  const char *from_name, const char *to_name,
 691                  struct cifs_sb_info *cifs_sb)
 692 {
 693         struct cifsFileInfo *cfile;
 694
 695         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 696
 697         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 698                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 699 }
 700
 701 int
 702 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 703                      const char *from_name, const char *to_name,
 704                      struct cifs_sb_info *cifs_sb)
 705 {
 706         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 707                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 708                                   NULL);
 709 }
 710
 711 int
 712 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 713                    const char *full_path, __u64 size,
 714                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 715 {
 716         __le64 eof = cpu_to_le64(size);
 717         struct cifsFileInfo *cfile;
 718
 719         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 720         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 721                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 722                                 &eof, SMB2_OP_SET_EOF, cfile);
 723 }
 724
 725 int
 726 smb2_set_file_info(struct inode *inode, const char *full_path,
 727                    FILE_BASIC_INFO *buf, const unsigned int xid)
 728 {
 729         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 730         struct tcon_link *tlink;
 731         struct cifs_tcon *tcon;
 732         struct cifsFileInfo *cfile;
 733         int rc;
 734
 735         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 736             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 737             (buf->Attributes == 0))
 738                 return 0; /* would be a no op, no sense sending this */
 739
 740         tlink = cifs_sb_tlink(cifs_sb);
 741         if (IS_ERR(tlink))
 742                 return PTR_ERR(tlink);
 743         tcon = tlink_tcon(tlink);
 744
 745         cifs_get_writable_path(tcon, full_path, FIND_WR_ANY, &cfile);
 746         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 747                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 748                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, cfile);
 749         cifs_put_tlink(tlink);
 750         return rc;
 751 }