fs/cifs/smb2inode.c

   1 /*
   2  *   fs/cifs/smb2inode.c
   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  *   This library is free software; you can redistribute it and/or modify
  10  *   it under the terms of the GNU Lesser General Public License as published
  11  *   by the Free Software Foundation; either version 2.1 of the License, or
  12  *   (at your option) any later version.
  13  *
  14  *   This library is distributed in the hope that it will be useful,
  15  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  17  *   the GNU Lesser General Public License for more details.
  18  *
  19  *   You should have received a copy of the GNU Lesser General Public License
  20  *   along with this library; if not, write to the Free Software
  21  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  22  */
  23 #include <linux/fs.h>
  24 #include <linux/stat.h>
  25 #include <linux/slab.h>
  26 #include <linux/pagemap.h>
  27 #include <asm/div64.h>
  28 #include "cifsfs.h"
  29 #include "cifspdu.h"
  30 #include "cifsglob.h"
  31 #include "cifsproto.h"
  32 #include "cifs_debug.h"
  33 #include "cifs_fs_sb.h"
  34 #include "cifs_unicode.h"
  35 #include "fscache.h"
  36 #include "smb2glob.h"
  37 #include "smb2pdu.h"
  38 #include "smb2proto.h"
  39
  40 static void
  41 free_set_inf_compound(struct smb_rqst *rqst)
  42 {
  43         if (rqst[1].rq_iov)
  44                 SMB2_set_info_free(&rqst[1]);
  45         if (rqst[2].rq_iov)
  46                 SMB2_close_free(&rqst[2]);
  47 }
  48
  49
  50 struct cop_vars {
  51         struct cifs_open_parms oparms;
  52         struct kvec rsp_iov[3];
  53         struct smb_rqst rqst[3];
  54         struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
  55         struct kvec qi_iov[1];
  56         struct kvec si_iov[SMB2_SET_INFO_IOV_SIZE];
  57         struct kvec close_iov[1];
  58         struct smb2_file_rename_info rename_info;
  59         struct smb2_file_link_info link_info;
  60 };
  61
  62 static int
  63 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
  64                  struct cifs_sb_info *cifs_sb, const char *full_path,
  65                  __u32 desired_access, __u32 create_disposition,
  66                  __u32 create_options, umode_t mode, void *ptr, int command,
  67                  struct cifsFileInfo *cfile)
  68 {
  69         struct cop_vars *vars = NULL;
  70         struct kvec *rsp_iov;
  71         struct smb_rqst *rqst;
  72         int rc;
  73         __le16 *utf16_path = NULL;
  74         __u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
  75         struct cifs_fid fid;
  76         struct cifs_ses *ses = tcon->ses;
  77         struct TCP_Server_Info *server;
  78         int num_rqst = 0;
  79         int resp_buftype[3];
  80         struct smb2_query_info_rsp *qi_rsp = NULL;
  81         int flags = 0;
  82         __u8 delete_pending[8] = {1, 0, 0, 0, 0, 0, 0, 0};
  83         unsigned int size[2];
  84         void *data[2];
  85         int len;
  86
  87         vars = kzalloc(sizeof(*vars), GFP_ATOMIC);
  88         if (vars == NULL)
  89                 return -ENOMEM;
  90         rqst = &vars->rqst[0];
  91         rsp_iov = &vars->rsp_iov[0];
  92
  93         server = cifs_pick_channel(ses);
  94
  95         if (smb3_encryption_required(tcon))
  96                 flags |= CIFS_TRANSFORM_REQ;
  97
  98         resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
  99
 100         /* We already have a handle so we can skip the open */
 101         if (cfile)
 102                 goto after_open;
 103
 104         /* Open */
 105         utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 106         if (!utf16_path) {
 107                 rc = -ENOMEM;
 108                 goto finished;
 109         }
 110
 111         vars->oparms.tcon = tcon;
 112         vars->oparms.desired_access = desired_access;
 113         vars->oparms.disposition = create_disposition;
 114         vars->oparms.create_options = cifs_create_options(cifs_sb, create_options);
 115         vars->oparms.fid = &fid;
 116         vars->oparms.reconnect = false;
 117         vars->oparms.mode = mode;
 118         vars->oparms.cifs_sb = cifs_sb;
 119
 120         rqst[num_rqst].rq_iov = &vars->open_iov[0];
 121         rqst[num_rqst].rq_nvec = SMB2_CREATE_IOV_SIZE;
 122         rc = SMB2_open_init(tcon, server,
 123                             &rqst[num_rqst], &oplock, &vars->oparms,
 124                             utf16_path);
 125         kfree(utf16_path);
 126         if (rc)
 127                 goto finished;
 128
 129         smb2_set_next_command(tcon, &rqst[num_rqst]);
 130  after_open:
 131         num_rqst++;
 132         rc = 0;
 133
 134         /* Operation */
 135         switch (command) {
 136         case SMB2_OP_QUERY_INFO:
 137                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 138                 rqst[num_rqst].rq_nvec = 1;
 139
 140                 if (cfile)
 141                         rc = SMB2_query_info_init(tcon, server,
 142                                 &rqst[num_rqst],
 143                                 cfile->fid.persistent_fid,
 144                                 cfile->fid.volatile_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                 else {
 150                         rc = SMB2_query_info_init(tcon, server,
 151                                 &rqst[num_rqst],
 152                                 COMPOUND_FID,
 153                                 COMPOUND_FID,
 154                                 FILE_ALL_INFORMATION,
 155                                 SMB2_O_INFO_FILE, 0,
 156                                 sizeof(struct smb2_file_all_info) +
 157                                           PATH_MAX * 2, 0, NULL);
 158                         if (!rc) {
 159                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 160                                 smb2_set_related(&rqst[num_rqst]);
 161                         }
 162                 }
 163
 164                 if (rc)
 165                         goto finished;
 166                 num_rqst++;
 167                 trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
 168                                                      full_path);
 169                 break;
 170         case SMB2_OP_POSIX_QUERY_INFO:
 171                 rqst[num_rqst].rq_iov = &vars->qi_iov[0];
 172                 rqst[num_rqst].rq_nvec = 1;
 173
 174                 if (cfile)
 175                         rc = SMB2_query_info_init(tcon, server,
 176                                 &rqst[num_rqst],
 177                                 cfile->fid.persistent_fid,
 178                                 cfile->fid.volatile_fid,
 179                                 SMB_FIND_FILE_POSIX_INFO,
 180                                 SMB2_O_INFO_FILE, 0,
 181                                 /* TBD: fix following to allow for longer SIDs */
 182                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 183                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 184                 else {
 185                         rc = SMB2_query_info_init(tcon, server,
 186                                 &rqst[num_rqst],
 187                                 COMPOUND_FID,
 188                                 COMPOUND_FID,
 189                                 SMB_FIND_FILE_POSIX_INFO,
 190                                 SMB2_O_INFO_FILE, 0,
 191                                 sizeof(struct smb311_posix_qinfo *) + (PATH_MAX * 2) +
 192                                 (sizeof(struct cifs_sid) * 2), 0, NULL);
 193                         if (!rc) {
 194                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 195                                 smb2_set_related(&rqst[num_rqst]);
 196                         }
 197                 }
 198
 199                 if (rc)
 200                         goto finished;
 201                 num_rqst++;
 202                 trace_smb3_posix_query_info_compound_enter(xid, ses->Suid, tcon->tid, full_path);
 203                 break;
 204         case SMB2_OP_DELETE:
 205                 trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 206                 break;
 207         case SMB2_OP_MKDIR:
 208                 /*
 209                  * Directories are created through parameters in the
 210                  * SMB2_open() call.
 211                  */
 212                 trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 213                 break;
 214         case SMB2_OP_RMDIR:
 215                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 216                 rqst[num_rqst].rq_nvec = 1;
 217
 218                 size[0] = 1; /* sizeof __u8 See MS-FSCC section 2.4.11 */
 219                 data[0] = &delete_pending[0];
 220
 221                 rc = SMB2_set_info_init(tcon, server,
 222                                         &rqst[num_rqst], COMPOUND_FID,
 223                                         COMPOUND_FID, current->tgid,
 224                                         FILE_DISPOSITION_INFORMATION,
 225                                         SMB2_O_INFO_FILE, 0, data, size);
 226                 if (rc)
 227                         goto finished;
 228                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 229                 smb2_set_related(&rqst[num_rqst++]);
 230                 trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 231                 break;
 232         case SMB2_OP_SET_EOF:
 233                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 234                 rqst[num_rqst].rq_nvec = 1;
 235
 236                 size[0] = 8; /* sizeof __le64 */
 237                 data[0] = ptr;
 238
 239                 if (cfile) {
 240                         rc = SMB2_set_info_init(tcon, server,
 241                                                 &rqst[num_rqst],
 242                                                 cfile->fid.persistent_fid,
 243                                                 cfile->fid.volatile_fid,
 244                                                 current->tgid,
 245                                                 FILE_END_OF_FILE_INFORMATION,
 246                                                 SMB2_O_INFO_FILE, 0,
 247                                                 data, size);
 248                 } else {
 249                         rc = SMB2_set_info_init(tcon, server,
 250                                                 &rqst[num_rqst],
 251                                                 COMPOUND_FID,
 252                                                 COMPOUND_FID,
 253                                                 current->tgid,
 254                                                 FILE_END_OF_FILE_INFORMATION,
 255                                                 SMB2_O_INFO_FILE, 0,
 256                                                 data, size);
 257                         if (!rc) {
 258                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 259                                 smb2_set_related(&rqst[num_rqst]);
 260                         }
 261                 }
 262                 if (rc)
 263                         goto finished;
 264                 num_rqst++;
 265                 trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 266                 break;
 267         case SMB2_OP_SET_INFO:
 268                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 269                 rqst[num_rqst].rq_nvec = 1;
 270
 271
 272                 size[0] = sizeof(FILE_BASIC_INFO);
 273                 data[0] = ptr;
 274
 275                 if (cfile)
 276                         rc = SMB2_set_info_init(tcon, server,
 277                                 &rqst[num_rqst],
 278                                 cfile->fid.persistent_fid,
 279                                 cfile->fid.volatile_fid, current->tgid,
 280                                 FILE_BASIC_INFORMATION,
 281                                 SMB2_O_INFO_FILE, 0, data, size);
 282                 else {
 283                         rc = SMB2_set_info_init(tcon, server,
 284                                 &rqst[num_rqst],
 285                                 COMPOUND_FID,
 286                                 COMPOUND_FID, current->tgid,
 287                                 FILE_BASIC_INFORMATION,
 288                                 SMB2_O_INFO_FILE, 0, data, size);
 289                         if (!rc) {
 290                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 291                                 smb2_set_related(&rqst[num_rqst]);
 292                         }
 293                 }
 294
 295                 if (rc)
 296                         goto finished;
 297                 num_rqst++;
 298                 trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
 299                                                    full_path);
 300                 break;
 301         case SMB2_OP_RENAME:
 302                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 303                 rqst[num_rqst].rq_nvec = 2;
 304
 305                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 306
 307                 vars->rename_info.ReplaceIfExists = 1;
 308                 vars->rename_info.RootDirectory = 0;
 309                 vars->rename_info.FileNameLength = cpu_to_le32(len);
 310
 311                 size[0] = sizeof(struct smb2_file_rename_info);
 312                 data[0] = &vars->rename_info;
 313
 314                 size[1] = len + 2 /* null */;
 315                 data[1] = (__le16 *)ptr;
 316
 317                 if (cfile)
 318                         rc = SMB2_set_info_init(tcon, server,
 319                                                 &rqst[num_rqst],
 320                                                 cfile->fid.persistent_fid,
 321                                                 cfile->fid.volatile_fid,
 322                                         current->tgid, FILE_RENAME_INFORMATION,
 323                                         SMB2_O_INFO_FILE, 0, data, size);
 324                 else {
 325                         rc = SMB2_set_info_init(tcon, server,
 326                                         &rqst[num_rqst],
 327                                         COMPOUND_FID, COMPOUND_FID,
 328                                         current->tgid, FILE_RENAME_INFORMATION,
 329                                         SMB2_O_INFO_FILE, 0, data, size);
 330                         if (!rc) {
 331                                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 332                                 smb2_set_related(&rqst[num_rqst]);
 333                         }
 334                 }
 335                 if (rc)
 336                         goto finished;
 337                 num_rqst++;
 338                 trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 339                 break;
 340         case SMB2_OP_HARDLINK:
 341                 rqst[num_rqst].rq_iov = &vars->si_iov[0];
 342                 rqst[num_rqst].rq_nvec = 2;
 343
 344                 len = (2 * UniStrnlen((wchar_t *)ptr, PATH_MAX));
 345
 346                 vars->link_info.ReplaceIfExists = 0;
 347                 vars->link_info.RootDirectory = 0;
 348                 vars->link_info.FileNameLength = cpu_to_le32(len);
 349
 350                 size[0] = sizeof(struct smb2_file_link_info);
 351                 data[0] = &vars->link_info;
 352
 353                 size[1] = len + 2 /* null */;
 354                 data[1] = (__le16 *)ptr;
 355
 356                 rc = SMB2_set_info_init(tcon, server,
 357                                         &rqst[num_rqst], COMPOUND_FID,
 358                                         COMPOUND_FID, current->tgid,
 359                                         FILE_LINK_INFORMATION,
 360                                         SMB2_O_INFO_FILE, 0, data, size);
 361                 if (rc)
 362                         goto finished;
 363                 smb2_set_next_command(tcon, &rqst[num_rqst]);
 364                 smb2_set_related(&rqst[num_rqst++]);
 365                 trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 366                 break;
 367         default:
 368                 cifs_dbg(VFS, "Invalid command\n");
 369                 rc = -EINVAL;
 370         }
 371         if (rc)
 372                 goto finished;
 373
 374         /* We already have a handle so we can skip the close */
 375         if (cfile)
 376                 goto after_close;
 377         /* Close */
 378         flags |= CIFS_CP_CREATE_CLOSE_OP;
 379         rqst[num_rqst].rq_iov = &vars->close_iov[0];
 380         rqst[num_rqst].rq_nvec = 1;
 381         rc = SMB2_close_init(tcon, server,
 382                              &rqst[num_rqst], COMPOUND_FID,
 383                              COMPOUND_FID, false);
 384         smb2_set_related(&rqst[num_rqst]);
 385         if (rc)
 386                 goto finished;
 387  after_close:
 388         num_rqst++;
 389
 390         if (cfile) {
 391                 rc = compound_send_recv(xid, ses, server,
 392                                         flags, num_rqst - 2,
 393                                         &rqst[1], &resp_buftype[1],
 394                                         &rsp_iov[1]);
 395         } else
 396                 rc = compound_send_recv(xid, ses, server,
 397                                         flags, num_rqst,
 398                                         rqst, resp_buftype,
 399                                         rsp_iov);
 400
 401  finished:
 402         if (cfile)
 403                 cifsFileInfo_put(cfile);
 404
 405         SMB2_open_free(&rqst[0]);
 406         if (rc == -EREMCHG) {
 407                 pr_warn_once("server share %s deleted\n", tcon->treeName);
 408                 tcon->need_reconnect = true;
 409         }
 410
 411         switch (command) {
 412         case SMB2_OP_QUERY_INFO:
 413                 if (rc == 0) {
 414                         qi_rsp = (struct smb2_query_info_rsp *)
 415                                 rsp_iov[1].iov_base;
 416                         rc = smb2_validate_and_copy_iov(
 417                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 418                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 419                                 &rsp_iov[1], sizeof(struct smb2_file_all_info),
 420                                 ptr);
 421                 }
 422                 if (rqst[1].rq_iov)
 423                         SMB2_query_info_free(&rqst[1]);
 424                 if (rqst[2].rq_iov)
 425                         SMB2_close_free(&rqst[2]);
 426                 if (rc)
 427                         trace_smb3_query_info_compound_err(xid,  ses->Suid,
 428                                                 tcon->tid, rc);
 429                 else
 430                         trace_smb3_query_info_compound_done(xid, ses->Suid,
 431                                                 tcon->tid);
 432                 break;
 433         case SMB2_OP_POSIX_QUERY_INFO:
 434                 if (rc == 0) {
 435                         qi_rsp = (struct smb2_query_info_rsp *)
 436                                 rsp_iov[1].iov_base;
 437                         rc = smb2_validate_and_copy_iov(
 438                                 le16_to_cpu(qi_rsp->OutputBufferOffset),
 439                                 le32_to_cpu(qi_rsp->OutputBufferLength),
 440                                 &rsp_iov[1], sizeof(struct smb311_posix_qinfo) /* add SIDs */, ptr);
 441                 }
 442                 if (rqst[1].rq_iov)
 443                         SMB2_query_info_free(&rqst[1]);
 444                 if (rqst[2].rq_iov)
 445                         SMB2_close_free(&rqst[2]);
 446                 if (rc)
 447                         trace_smb3_posix_query_info_compound_err(xid,  ses->Suid, tcon->tid, rc);
 448                 else
 449                         trace_smb3_posix_query_info_compound_done(xid, ses->Suid, tcon->tid);
 450                 break;
 451         case SMB2_OP_DELETE:
 452                 if (rc)
 453                         trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
 454                 else
 455                         trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
 456                 if (rqst[1].rq_iov)
 457                         SMB2_close_free(&rqst[1]);
 458                 break;
 459         case SMB2_OP_MKDIR:
 460                 if (rc)
 461                         trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
 462                 else
 463                         trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 464                 if (rqst[1].rq_iov)
 465                         SMB2_close_free(&rqst[1]);
 466                 break;
 467         case SMB2_OP_HARDLINK:
 468                 if (rc)
 469                         trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
 470                 else
 471                         trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
 472                 free_set_inf_compound(rqst);
 473                 break;
 474         case SMB2_OP_RENAME:
 475                 if (rc)
 476                         trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
 477                 else
 478                         trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
 479                 free_set_inf_compound(rqst);
 480                 break;
 481         case SMB2_OP_RMDIR:
 482                 if (rc)
 483                         trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
 484                 else
 485                         trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
 486                 free_set_inf_compound(rqst);
 487                 break;
 488         case SMB2_OP_SET_EOF:
 489                 if (rc)
 490                         trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
 491                 else
 492                         trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
 493                 free_set_inf_compound(rqst);
 494                 break;
 495         case SMB2_OP_SET_INFO:
 496                 if (rc)
 497                         trace_smb3_set_info_compound_err(xid,  ses->Suid,
 498                                                 tcon->tid, rc);
 499                 else
 500                         trace_smb3_set_info_compound_done(xid, ses->Suid,
 501                                                 tcon->tid);
 502                 free_set_inf_compound(rqst);
 503                 break;
 504         }
 505         free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 506         free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 507         free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 508         kfree(vars);
 509         return rc;
 510 }
 511
 512 void
 513 move_smb2_info_to_cifs(FILE_ALL_INFO *dst, struct smb2_file_all_info *src)
 514 {
 515         memcpy(dst, src, (size_t)(&src->CurrentByteOffset) - (size_t)src);
 516         dst->CurrentByteOffset = src->CurrentByteOffset;
 517         dst->Mode = src->Mode;
 518         dst->AlignmentRequirement = src->AlignmentRequirement;
 519         dst->IndexNumber1 = 0; /* we don't use it */
 520 }
 521
 522 int
 523 smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 524                      struct cifs_sb_info *cifs_sb, const char *full_path,
 525                      FILE_ALL_INFO *data, bool *adjust_tz, bool *reparse)
 526 {
 527         int rc;
 528         struct smb2_file_all_info *smb2_data;
 529         __u32 create_options = 0;
 530         bool no_cached_open = tcon->nohandlecache;
 531         struct cifsFileInfo *cfile;
 532         struct cached_fid *cfid = NULL;
 533
 534         *adjust_tz = false;
 535         *reparse = false;
 536
 537         smb2_data = kzalloc(sizeof(struct smb2_file_all_info) + PATH_MAX * 2,
 538                             GFP_KERNEL);
 539         if (smb2_data == NULL)
 540                 return -ENOMEM;
 541
 542         /* If it is a root and its handle is cached then use it */
 543         if (!strlen(full_path) && !no_cached_open) {
 544                 rc = open_shroot(xid, tcon, cifs_sb, &cfid);
 545                 if (rc)
 546                         goto out;
 547
 548                 if (tcon->crfid.file_all_info_is_valid) {
 549                         move_smb2_info_to_cifs(data,
 550                                                &tcon->crfid.file_all_info);
 551                 } else {
 552                         rc = SMB2_query_info(xid, tcon,
 553                                              cfid->fid->persistent_fid,
 554                                              cfid->fid->volatile_fid, smb2_data);
 555                         if (!rc)
 556                                 move_smb2_info_to_cifs(data, smb2_data);
 557                 }
 558                 close_shroot(cfid);
 559                 goto out;
 560         }
 561
 562         cifs_get_readable_path(tcon, full_path, &cfile);
 563         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 564                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 565                               ACL_NO_MODE, smb2_data, SMB2_OP_QUERY_INFO, cfile);
 566         if (rc == -EOPNOTSUPP) {
 567                 *reparse = true;
 568                 create_options |= OPEN_REPARSE_POINT;
 569
 570                 /* Failed on a symbolic link - query a reparse point info */
 571                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 572                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 573                                       create_options, ACL_NO_MODE,
 574                                       smb2_data, SMB2_OP_QUERY_INFO, NULL);
 575         }
 576         if (rc)
 577                 goto out;
 578
 579         move_smb2_info_to_cifs(data, smb2_data);
 580 out:
 581         kfree(smb2_data);
 582         return rc;
 583 }
 584
 585
 586 int
 587 smb311_posix_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 588                      struct cifs_sb_info *cifs_sb, const char *full_path,
 589                      struct smb311_posix_qinfo *data, bool *adjust_tz, bool *reparse)
 590 {
 591         int rc;
 592         __u32 create_options = 0;
 593         struct cifsFileInfo *cfile;
 594         struct smb311_posix_qinfo *smb2_data;
 595
 596         *adjust_tz = false;
 597         *reparse = false;
 598
 599         /* BB TODO: Make struct larger when add support for parsing owner SIDs */
 600         smb2_data = kzalloc(sizeof(struct smb311_posix_qinfo),
 601                             GFP_KERNEL);
 602         if (smb2_data == NULL)
 603                 return -ENOMEM;
 604
 605         /*
 606          * BB TODO: Add support for using the cached root handle.
 607          * Create SMB2_query_posix_info worker function to do non-compounded query
 608          * when we already have an open file handle for this. For now this is fast enough
 609          * (always using the compounded version).
 610          */
 611
 612         cifs_get_readable_path(tcon, full_path, &cfile);
 613         rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 614                               FILE_READ_ATTRIBUTES, FILE_OPEN, create_options,
 615                               ACL_NO_MODE, smb2_data, SMB2_OP_POSIX_QUERY_INFO, cfile);
 616         if (rc == -EOPNOTSUPP) {
 617                 /* BB TODO: When support for special files added to Samba re-verify this path */
 618                 *reparse = true;
 619                 create_options |= OPEN_REPARSE_POINT;
 620
 621                 /* Failed on a symbolic link - query a reparse point info */
 622                 rc = smb2_compound_op(xid, tcon, cifs_sb, full_path,
 623                                       FILE_READ_ATTRIBUTES, FILE_OPEN,
 624                                       create_options, ACL_NO_MODE,
 625                                       smb2_data, SMB2_OP_POSIX_QUERY_INFO, NULL);
 626         }
 627         if (rc)
 628                 goto out;
 629
 630          /* TODO: will need to allow for the 2 SIDs when add support for getting owner UID/GID */
 631         memcpy(data, smb2_data, sizeof(struct smb311_posix_qinfo));
 632
 633 out:
 634         kfree(smb2_data);
 635         return rc;
 636 }
 637
 638 int
 639 smb2_mkdir(const unsigned int xid, struct inode *parent_inode, umode_t mode,
 640            struct cifs_tcon *tcon, const char *name,
 641            struct cifs_sb_info *cifs_sb)
 642 {
 643         return smb2_compound_op(xid, tcon, cifs_sb, name,
 644                                 FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 645                                 CREATE_NOT_FILE, mode, NULL, SMB2_OP_MKDIR,
 646                                 NULL);
 647 }
 648
 649 void
 650 smb2_mkdir_setinfo(struct inode *inode, const char *name,
 651                    struct cifs_sb_info *cifs_sb, struct cifs_tcon *tcon,
 652                    const unsigned int xid)
 653 {
 654         FILE_BASIC_INFO data;
 655         struct cifsInodeInfo *cifs_i;
 656         struct cifsFileInfo *cfile;
 657         u32 dosattrs;
 658         int tmprc;
 659
 660         memset(&data, 0, sizeof(data));
 661         cifs_i = CIFS_I(inode);
 662         dosattrs = cifs_i->cifsAttrs | ATTR_READONLY;
 663         data.Attributes = cpu_to_le32(dosattrs);
 664         cifs_get_writable_path(tcon, name, FIND_WR_ANY, &cfile);
 665         tmprc = smb2_compound_op(xid, tcon, cifs_sb, name,
 666                                  FILE_WRITE_ATTRIBUTES, FILE_CREATE,
 667                                  CREATE_NOT_FILE, ACL_NO_MODE,
 668                                  &data, SMB2_OP_SET_INFO, cfile);
 669         if (tmprc == 0)
 670                 cifs_i->cifsAttrs = dosattrs;
 671 }
 672
 673 int
 674 smb2_rmdir(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 675            struct cifs_sb_info *cifs_sb)
 676 {
 677         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 678                                 CREATE_NOT_FILE, ACL_NO_MODE,
 679                                 NULL, SMB2_OP_RMDIR, NULL);
 680 }
 681
 682 int
 683 smb2_unlink(const unsigned int xid, struct cifs_tcon *tcon, const char *name,
 684             struct cifs_sb_info *cifs_sb)
 685 {
 686         return smb2_compound_op(xid, tcon, cifs_sb, name, DELETE, FILE_OPEN,
 687                                 CREATE_DELETE_ON_CLOSE | OPEN_REPARSE_POINT,
 688                                 ACL_NO_MODE, NULL, SMB2_OP_DELETE, NULL);
 689 }
 690
 691 static int
 692 smb2_set_path_attr(const unsigned int xid, struct cifs_tcon *tcon,
 693                    const char *from_name, const char *to_name,
 694                    struct cifs_sb_info *cifs_sb, __u32 access, int command,
 695                    struct cifsFileInfo *cfile)
 696 {
 697         __le16 *smb2_to_name = NULL;
 698         int rc;
 699
 700         smb2_to_name = cifs_convert_path_to_utf16(to_name, cifs_sb);
 701         if (smb2_to_name == NULL) {
 702                 rc = -ENOMEM;
 703                 goto smb2_rename_path;
 704         }
 705         rc = smb2_compound_op(xid, tcon, cifs_sb, from_name, access,
 706                               FILE_OPEN, 0, ACL_NO_MODE, smb2_to_name,
 707                               command, cfile);
 708 smb2_rename_path:
 709         kfree(smb2_to_name);
 710         return rc;
 711 }
 712
 713 int
 714 smb2_rename_path(const unsigned int xid, struct cifs_tcon *tcon,
 715                  const char *from_name, const char *to_name,
 716                  struct cifs_sb_info *cifs_sb)
 717 {
 718         struct cifsFileInfo *cfile;
 719
 720         cifs_get_writable_path(tcon, from_name, FIND_WR_WITH_DELETE, &cfile);
 721
 722         return smb2_set_path_attr(xid, tcon, from_name, to_name,
 723                                   cifs_sb, DELETE, SMB2_OP_RENAME, cfile);
 724 }
 725
 726 int
 727 smb2_create_hardlink(const unsigned int xid, struct cifs_tcon *tcon,
 728                      const char *from_name, const char *to_name,
 729                      struct cifs_sb_info *cifs_sb)
 730 {
 731         return smb2_set_path_attr(xid, tcon, from_name, to_name, cifs_sb,
 732                                   FILE_READ_ATTRIBUTES, SMB2_OP_HARDLINK,
 733                                   NULL);
 734 }
 735
 736 int
 737 smb2_set_path_size(const unsigned int xid, struct cifs_tcon *tcon,
 738                    const char *full_path, __u64 size,
 739                    struct cifs_sb_info *cifs_sb, bool set_alloc)
 740 {
 741         __le64 eof = cpu_to_le64(size);
 742
 743         return smb2_compound_op(xid, tcon, cifs_sb, full_path,
 744                                 FILE_WRITE_DATA, FILE_OPEN, 0, ACL_NO_MODE,
 745                                 &eof, SMB2_OP_SET_EOF, NULL);
 746 }
 747
 748 int
 749 smb2_set_file_info(struct inode *inode, const char *full_path,
 750                    FILE_BASIC_INFO *buf, const unsigned int xid)
 751 {
 752         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 753         struct tcon_link *tlink;
 754         int rc;
 755
 756         if ((buf->CreationTime == 0) && (buf->LastAccessTime == 0) &&
 757             (buf->LastWriteTime == 0) && (buf->ChangeTime == 0) &&
 758             (buf->Attributes == 0))
 759                 return 0; /* would be a no op, no sense sending this */
 760
 761         tlink = cifs_sb_tlink(cifs_sb);
 762         if (IS_ERR(tlink))
 763                 return PTR_ERR(tlink);
 764
 765         rc = smb2_compound_op(xid, tlink_tcon(tlink), cifs_sb, full_path,
 766                               FILE_WRITE_ATTRIBUTES, FILE_OPEN,
 767                               0, ACL_NO_MODE, buf, SMB2_OP_SET_INFO, NULL);
 768         cifs_put_tlink(tlink);
 769         return rc;
 770 }