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   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32
  33 static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
  34 {
  35         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
  36
  37         switch (inode->i_mode & S_IFMT) {
  38         case S_IFREG:
  39                 inode->i_op = &cifs_file_inode_ops;
  40                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
  41                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
  42                                 inode->i_fop = &cifs_file_direct_nobrl_ops;
  43                         else
  44                                 inode->i_fop = &cifs_file_direct_ops;
  45                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
  46                         inode->i_fop = &cifs_file_nobrl_ops;
  47                 else { /* not direct, send byte range locks */
  48                         inode->i_fop = &cifs_file_ops;
  49                 }
  50
  51
  52                 /* check if server can support readpages */
  53                 if (cifs_sb->tcon->ses->server->maxBuf <
  54                                 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
  55                         inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
  56                 else
  57                         inode->i_data.a_ops = &cifs_addr_ops;
  58                 break;
  59         case S_IFDIR:
  60 #ifdef CONFIG_CIFS_DFS_UPCALL
  61                 if (is_dfs_referral) {
  62                         inode->i_op = &cifs_dfs_referral_inode_operations;
  63                 } else {
  64 #else /* NO DFS support, treat as a directory */
  65                 {
  66 #endif
  67                         inode->i_op = &cifs_dir_inode_ops;
  68                         inode->i_fop = &cifs_dir_ops;
  69                 }
  70                 break;
  71         case S_IFLNK:
  72                 inode->i_op = &cifs_symlink_inode_ops;
  73                 break;
  74         default:
  75                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
  76                 break;
  77         }
  78 }
  79
  80 static void cifs_unix_info_to_inode(struct inode *inode,
  81                 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
  82 {
  83         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
  84         struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
  85         __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
  86         __u64 end_of_file = le64_to_cpu(info->EndOfFile);
  87
  88         inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
  89         inode->i_mtime =
  90                 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
  91         inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
  92         inode->i_mode = le64_to_cpu(info->Permissions);
  93
  94         /*
  95          * Since we set the inode type below we need to mask off
  96          * to avoid strange results if bits set above.
  97          */
  98         inode->i_mode &= ~S_IFMT;
  99         switch (le32_to_cpu(info->Type)) {
 100         case UNIX_FILE:
 101                 inode->i_mode |= S_IFREG;
 102                 break;
 103         case UNIX_SYMLINK:
 104                 inode->i_mode |= S_IFLNK;
 105                 break;
 106         case UNIX_DIR:
 107                 inode->i_mode |= S_IFDIR;
 108                 break;
 109         case UNIX_CHARDEV:
 110                 inode->i_mode |= S_IFCHR;
 111                 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
 112                                       le64_to_cpu(info->DevMinor) & MINORMASK);
 113                 break;
 114         case UNIX_BLOCKDEV:
 115                 inode->i_mode |= S_IFBLK;
 116                 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
 117                                       le64_to_cpu(info->DevMinor) & MINORMASK);
 118                 break;
 119         case UNIX_FIFO:
 120                 inode->i_mode |= S_IFIFO;
 121                 break;
 122         case UNIX_SOCKET:
 123                 inode->i_mode |= S_IFSOCK;
 124                 break;
 125         default:
 126                 /* safest to call it a file if we do not know */
 127                 inode->i_mode |= S_IFREG;
 128                 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
 129                 break;
 130         }
 131
 132         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
 133             !force_uid_gid)
 134                 inode->i_uid = cifs_sb->mnt_uid;
 135         else
 136                 inode->i_uid = le64_to_cpu(info->Uid);
 137
 138         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
 139             !force_uid_gid)
 140                 inode->i_gid = cifs_sb->mnt_gid;
 141         else
 142                 inode->i_gid = le64_to_cpu(info->Gid);
 143
 144         inode->i_nlink = le64_to_cpu(info->Nlinks);
 145
 146         spin_lock(&inode->i_lock);
 147         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 148                 /*
 149                  * We can not safely change the file size here if the client
 150                  * is writing to it due to potential races.
 151                  */
 152                 i_size_write(inode, end_of_file);
 153
 154                 /*
 155                  * i_blocks is not related to (i_size / i_blksize),
 156                  * but instead 512 byte (2**9) size is required for
 157                  * calculating num blocks.
 158                  */
 159                 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 160         }
 161         spin_unlock(&inode->i_lock);
 162 }
 163
 164
 165 /*
 166  *      Needed to setup inode data for the directory which is the
 167  *      junction to the new submount (ie to setup the fake directory
 168  *      which represents a DFS referral)
 169  */
 170 static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
 171                                struct super_block *sb)
 172 {
 173         struct inode *pinode = NULL;
 174
 175         memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
 176
 177 /*      __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
 178         __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
 179         __u64 UniqueId = 0;  */
 180         pfnd_dat->LastStatusChange =
 181                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 182         pfnd_dat->LastAccessTime =
 183                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 184         pfnd_dat->LastModificationTime =
 185                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 186         pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
 187         pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
 188         pfnd_dat->Nlinks = cpu_to_le64(2);
 189         if (sb->s_root)
 190                 pinode = sb->s_root->d_inode;
 191         if (pinode == NULL)
 192                 return;
 193
 194         /* fill in default values for the remaining based on root
 195            inode since we can not query the server for this inode info */
 196         pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
 197         pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
 198         pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
 199         pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
 200 }
 201
 202 int cifs_get_inode_info_unix(struct inode **pinode,
 203         const unsigned char *full_path, struct super_block *sb, int xid)
 204 {
 205         int rc = 0;
 206         FILE_UNIX_BASIC_INFO find_data;
 207         struct cifsTconInfo *pTcon;
 208         struct inode *inode;
 209         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 210         bool is_dfs_referral = false;
 211         struct cifsInodeInfo *cifsInfo;
 212         __u64 num_of_bytes;
 213         __u64 end_of_file;
 214
 215         pTcon = cifs_sb->tcon;
 216         cFYI(1, ("Getting info on %s", full_path));
 217
 218         /* could have done a find first instead but this returns more info */
 219         rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
 220                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 221                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 222         if (rc == -EREMOTE && !is_dfs_referral) {
 223                 is_dfs_referral = true;
 224                 cFYI(DBG2, ("DFS ref"));
 225                 /* for DFS, server does not give us real inode data */
 226                 fill_fake_finddataunix(&find_data, sb);
 227                 rc = 0;
 228         } else if (rc)
 229                 goto cgiiu_exit;
 230
 231         num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
 232         end_of_file = le64_to_cpu(find_data.EndOfFile);
 233
 234         /* get new inode */
 235         if (*pinode == NULL) {
 236                 *pinode = new_inode(sb);
 237                 if (*pinode == NULL) {
 238                         rc = -ENOMEM;
 239                         goto cgiiu_exit;
 240                 }
 241                 /* Is an i_ino of zero legal? */
 242                 /* note ino incremented to unique num in new_inode */
 243                 /* Are there sanity checks we can use to ensure that
 244                    the server is really filling in that field? */
 245                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
 246                         (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
 247
 248                 if (sb->s_flags & MS_NOATIME)
 249                         (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 250
 251                 insert_inode_hash(*pinode);
 252         }
 253
 254         inode = *pinode;
 255         cifsInfo = CIFS_I(inode);
 256
 257         cFYI(1, ("Old time %ld", cifsInfo->time));
 258         cifsInfo->time = jiffies;
 259         cFYI(1, ("New time %ld", cifsInfo->time));
 260         /* this is ok to set on every inode revalidate */
 261         atomic_set(&cifsInfo->inUse, 1);
 262
 263         cifs_unix_info_to_inode(inode, &find_data, 0);
 264
 265         if (num_of_bytes < end_of_file)
 266                 cFYI(1, ("allocation size less than end of file"));
 267         cFYI(1, ("Size %ld and blocks %llu",
 268                 (unsigned long) inode->i_size,
 269                 (unsigned long long)inode->i_blocks));
 270
 271         cifs_set_ops(inode, is_dfs_referral);
 272 cgiiu_exit:
 273         return rc;
 274 }
 275
 276 static int decode_sfu_inode(struct inode *inode, __u64 size,
 277                             const unsigned char *path,
 278                             struct cifs_sb_info *cifs_sb, int xid)
 279 {
 280         int rc;
 281         int oplock = 0;
 282         __u16 netfid;
 283         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 284         char buf[24];
 285         unsigned int bytes_read;
 286         char *pbuf;
 287
 288         pbuf = buf;
 289
 290         if (size == 0) {
 291                 inode->i_mode |= S_IFIFO;
 292                 return 0;
 293         } else if (size < 8) {
 294                 return -EINVAL;  /* EOPNOTSUPP? */
 295         }
 296
 297         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 298                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 299                          cifs_sb->local_nls,
 300                          cifs_sb->mnt_cifs_flags &
 301                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 302         if (rc == 0) {
 303                 int buf_type = CIFS_NO_BUFFER;
 304                         /* Read header */
 305                 rc = CIFSSMBRead(xid, pTcon,
 306                                  netfid,
 307                                  24 /* length */, 0 /* offset */,
 308                                  &bytes_read, &pbuf, &buf_type);
 309                 if ((rc == 0) && (bytes_read >= 8)) {
 310                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 311                                 cFYI(1, ("Block device"));
 312                                 inode->i_mode |= S_IFBLK;
 313                                 if (bytes_read == 24) {
 314                                         /* we have enough to decode dev num */
 315                                         __u64 mjr; /* major */
 316                                         __u64 mnr; /* minor */
 317                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 318                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 319                                         inode->i_rdev = MKDEV(mjr, mnr);
 320                                 }
 321                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 322                                 cFYI(1, ("Char device"));
 323                                 inode->i_mode |= S_IFCHR;
 324                                 if (bytes_read == 24) {
 325                                         /* we have enough to decode dev num */
 326                                         __u64 mjr; /* major */
 327                                         __u64 mnr; /* minor */
 328                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 329                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 330                                         inode->i_rdev = MKDEV(mjr, mnr);
 331                                 }
 332                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 333                                 cFYI(1, ("Symlink"));
 334                                 inode->i_mode |= S_IFLNK;
 335                         } else {
 336                                 inode->i_mode |= S_IFREG; /* file? */
 337                                 rc = -EOPNOTSUPP;
 338                         }
 339                 } else {
 340                         inode->i_mode |= S_IFREG; /* then it is a file */
 341                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 342                 }
 343                 CIFSSMBClose(xid, pTcon, netfid);
 344         }
 345         return rc;
 346 }
 347
 348 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 349
 350 static int get_sfu_mode(struct inode *inode,
 351                         const unsigned char *path,
 352                         struct cifs_sb_info *cifs_sb, int xid)
 353 {
 354 #ifdef CONFIG_CIFS_XATTR
 355         ssize_t rc;
 356         char ea_value[4];
 357         __u32 mode;
 358
 359         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 360                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 361                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 362         if (rc < 0)
 363                 return (int)rc;
 364         else if (rc > 3) {
 365                 mode = le32_to_cpu(*((__le32 *)ea_value));
 366                 inode->i_mode &= ~SFBITS_MASK;
 367                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 368                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 369                 cFYI(1, ("special mode bits 0%o", mode));
 370                 return 0;
 371         } else {
 372                 return 0;
 373         }
 374 #else
 375         return -EOPNOTSUPP;
 376 #endif
 377 }
 378
 379 /*
 380  *      Needed to setup inode data for the directory which is the
 381  *      junction to the new submount (ie to setup the fake directory
 382  *      which represents a DFS referral)
 383  */
 384 static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
 385                                struct super_block *sb)
 386 {
 387         memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
 388
 389 /*      __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
 390         __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
 391         __u8 pfnd_dat->DeletePending = 0;
 392         __u8 pfnd_data->Directory = 0;
 393         __le32 pfnd_dat->EASize = 0;
 394         __u64 pfnd_dat->IndexNumber = 0;
 395         __u64 pfnd_dat->IndexNumber1 = 0;  */
 396         pfnd_dat->CreationTime =
 397                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 398         pfnd_dat->LastAccessTime =
 399                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 400         pfnd_dat->LastWriteTime =
 401                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 402         pfnd_dat->ChangeTime =
 403                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 404         pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
 405         pfnd_dat->NumberOfLinks = cpu_to_le32(2);
 406 }
 407
 408 int cifs_get_inode_info(struct inode **pinode,
 409         const unsigned char *full_path, FILE_ALL_INFO *pfindData,
 410         struct super_block *sb, int xid, const __u16 *pfid)
 411 {
 412         int rc = 0;
 413         __u32 attr;
 414         struct cifsInodeInfo *cifsInfo;
 415         struct cifsTconInfo *pTcon;
 416         struct inode *inode;
 417         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 418         char *buf = NULL;
 419         bool adjustTZ = false;
 420         bool is_dfs_referral = false;
 421         umode_t default_mode;
 422
 423         pTcon = cifs_sb->tcon;
 424         cFYI(1, ("Getting info on %s", full_path));
 425
 426         if ((pfindData == NULL) && (*pinode != NULL)) {
 427                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 428                         cFYI(1, ("No need to revalidate cached inode sizes"));
 429                         return rc;
 430                 }
 431         }
 432
 433         /* if file info not passed in then get it from server */
 434         if (pfindData == NULL) {
 435                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 436                 if (buf == NULL)
 437                         return -ENOMEM;
 438                 pfindData = (FILE_ALL_INFO *)buf;
 439
 440                 /* could do find first instead but this returns more info */
 441                 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
 442                               0 /* not legacy */,
 443                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 444                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 445                 /* BB optimize code so we do not make the above call
 446                 when server claims no NT SMB support and the above call
 447                 failed at least once - set flag in tcon or mount */
 448                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 449                         rc = SMBQueryInformation(xid, pTcon, full_path,
 450                                         pfindData, cifs_sb->local_nls,
 451                                         cifs_sb->mnt_cifs_flags &
 452                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 453                         adjustTZ = true;
 454                 }
 455         }
 456         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 457         if (rc == -EREMOTE) {
 458                 is_dfs_referral = true;
 459                 fill_fake_finddata(pfindData, sb);
 460                 rc = 0;
 461         } else if (rc)
 462                 goto cgii_exit;
 463
 464         attr = le32_to_cpu(pfindData->Attributes);
 465
 466         /* get new inode */
 467         if (*pinode == NULL) {
 468                 *pinode = new_inode(sb);
 469                 if (*pinode == NULL) {
 470                         rc = -ENOMEM;
 471                         goto cgii_exit;
 472                 }
 473                 /* Is an i_ino of zero legal? Can we use that to check
 474                    if the server supports returning inode numbers?  Are
 475                    there other sanity checks we can use to ensure that
 476                    the server is really filling in that field? */
 477
 478                 /* We can not use the IndexNumber field by default from
 479                    Windows or Samba (in ALL_INFO buf) but we can request
 480                    it explicitly.  It may not be unique presumably if
 481                    the server has multiple devices mounted under one share */
 482
 483                 /* There may be higher info levels that work but are
 484                    there Windows server or network appliances for which
 485                    IndexNumber field is not guaranteed unique? */
 486
 487                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 488                         int rc1 = 0;
 489                         __u64 inode_num;
 490
 491                         rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 492                                         full_path, &inode_num,
 493                                         cifs_sb->local_nls,
 494                                         cifs_sb->mnt_cifs_flags &
 495                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 496                         if (rc1) {
 497                                 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 498                                 /* BB EOPNOSUPP disable SERVER_INUM? */
 499                         } else /* do we need cast or hash to ino? */
 500                                 (*pinode)->i_ino = inode_num;
 501                 } /* else ino incremented to unique num in new_inode*/
 502                 if (sb->s_flags & MS_NOATIME)
 503                         (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 504                 insert_inode_hash(*pinode);
 505         }
 506         inode = *pinode;
 507         cifsInfo = CIFS_I(inode);
 508         cifsInfo->cifsAttrs = attr;
 509         cFYI(1, ("Old time %ld", cifsInfo->time));
 510         cifsInfo->time = jiffies;
 511         cFYI(1, ("New time %ld", cifsInfo->time));
 512
 513         /* blksize needs to be multiple of two. So safer to default to
 514         blksize and blkbits set in superblock so 2**blkbits and blksize
 515         will match rather than setting to:
 516         (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 517
 518         /* Linux can not store file creation time so ignore it */
 519         if (pfindData->LastAccessTime)
 520                 inode->i_atime = cifs_NTtimeToUnix
 521                         (le64_to_cpu(pfindData->LastAccessTime));
 522         else /* do not need to use current_fs_time - time not stored */
 523                 inode->i_atime = CURRENT_TIME;
 524         inode->i_mtime =
 525                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 526         inode->i_ctime =
 527             cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 528         cFYI(DBG2, ("Attributes came in as 0x%x", attr));
 529         if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 530                 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 531                 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 532         }
 533
 534         /* get default inode mode */
 535         if (attr & ATTR_DIRECTORY)
 536                 default_mode = cifs_sb->mnt_dir_mode;
 537         else
 538                 default_mode = cifs_sb->mnt_file_mode;
 539
 540         /* set permission bits */
 541         if (atomic_read(&cifsInfo->inUse) == 0 ||
 542             (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
 543                 inode->i_mode = default_mode;
 544         else {
 545                 /* just reenable write bits if !ATTR_READONLY */
 546                 if ((inode->i_mode & S_IWUGO) == 0 &&
 547                     (attr & ATTR_READONLY) == 0)
 548                         inode->i_mode |= (S_IWUGO & default_mode);
 549                         inode->i_mode &= ~S_IFMT;
 550         }
 551         /* clear write bits if ATTR_READONLY is set */
 552         if (attr & ATTR_READONLY)
 553                 inode->i_mode &= ~S_IWUGO;
 554
 555         /* set inode type */
 556         if ((attr & ATTR_SYSTEM) &&
 557             (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
 558                 /* no need to fix endianness on 0 */
 559                 if (pfindData->EndOfFile == 0)
 560                         inode->i_mode |= S_IFIFO;
 561                 else if (decode_sfu_inode(inode,
 562                                 le64_to_cpu(pfindData->EndOfFile),
 563                                 full_path, cifs_sb, xid))
 564                         cFYI(1, ("unknown SFU file type\n"));
 565         } else {
 566                 if (attr & ATTR_DIRECTORY)
 567                         inode->i_mode |= S_IFDIR;
 568                 else
 569                         inode->i_mode |= S_IFREG;
 570         }
 571
 572         spin_lock(&inode->i_lock);
 573         if (is_size_safe_to_change(cifsInfo,
 574                                    le64_to_cpu(pfindData->EndOfFile))) {
 575                 /* can not safely shrink the file size here if the
 576                    client is writing to it due to potential races */
 577                 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 578
 579                 /* 512 bytes (2**9) is the fake blocksize that must be
 580                    used for this calculation */
 581                 inode->i_blocks = (512 - 1 + le64_to_cpu(
 582                                    pfindData->AllocationSize)) >> 9;
 583         }
 584         spin_unlock(&inode->i_lock);
 585
 586         inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 587
 588         /* BB fill in uid and gid here? with help from winbind?
 589            or retrieve from NTFS stream extended attribute */
 590 #ifdef CONFIG_CIFS_EXPERIMENTAL
 591         /* fill in 0777 bits from ACL */
 592         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 593                 cFYI(1, ("Getting mode bits from ACL"));
 594                 acl_to_uid_mode(inode, full_path, pfid);
 595         }
 596 #endif
 597         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 598                 /* fill in remaining high mode bits e.g. SUID, VTX */
 599                 get_sfu_mode(inode, full_path, cifs_sb, xid);
 600         } else if (atomic_read(&cifsInfo->inUse) == 0) {
 601                 inode->i_uid = cifs_sb->mnt_uid;
 602                 inode->i_gid = cifs_sb->mnt_gid;
 603                 /* set so we do not keep refreshing these fields with
 604                    bad data after user has changed them in memory */
 605                 atomic_set(&cifsInfo->inUse, 1);
 606         }
 607
 608         cifs_set_ops(inode, is_dfs_referral);
 609
 610
 611
 612
 613 cgii_exit:
 614         kfree(buf);
 615         return rc;
 616 }
 617
 618 static const struct inode_operations cifs_ipc_inode_ops = {
 619         .lookup = cifs_lookup,
 620 };
 621
 622 /* gets root inode */
 623 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
 624 {
 625         int xid;
 626         struct cifs_sb_info *cifs_sb;
 627         struct inode *inode;
 628         long rc;
 629
 630         inode = iget_locked(sb, ino);
 631         if (!inode)
 632                 return ERR_PTR(-ENOMEM);
 633         if (!(inode->i_state & I_NEW))
 634                 return inode;
 635
 636         cifs_sb = CIFS_SB(inode->i_sb);
 637         xid = GetXid();
 638
 639         if (cifs_sb->tcon->unix_ext)
 640                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 641         else
 642                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
 643                                          NULL);
 644         if (rc && cifs_sb->tcon->ipc) {
 645                 cFYI(1, ("ipc connection - fake read inode"));
 646                 inode->i_mode |= S_IFDIR;
 647                 inode->i_nlink = 2;
 648                 inode->i_op = &cifs_ipc_inode_ops;
 649                 inode->i_fop = &simple_dir_operations;
 650                 inode->i_uid = cifs_sb->mnt_uid;
 651                 inode->i_gid = cifs_sb->mnt_gid;
 652                 _FreeXid(xid);
 653                 iget_failed(inode);
 654                 return ERR_PTR(rc);
 655         }
 656
 657         unlock_new_inode(inode);
 658
 659         /* can not call macro FreeXid here since in a void func
 660          * TODO: This is no longer true
 661          */
 662         _FreeXid(xid);
 663         return inode;
 664 }
 665
 666 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 667 {
 668         int rc = 0;
 669         int xid;
 670         struct cifs_sb_info *cifs_sb;
 671         struct cifsTconInfo *pTcon;
 672         char *full_path = NULL;
 673         struct cifsInodeInfo *cifsInode;
 674         FILE_BASIC_INFO *pinfo_buf;
 675
 676         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 677
 678         xid = GetXid();
 679
 680         if (inode)
 681                 cifs_sb = CIFS_SB(inode->i_sb);
 682         else
 683                 cifs_sb = CIFS_SB(direntry->d_sb);
 684         pTcon = cifs_sb->tcon;
 685
 686         /* Unlink can be called from rename so we can not grab the sem here
 687            since we deadlock otherwise */
 688 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 689         full_path = build_path_from_dentry(direntry);
 690 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 691         if (full_path == NULL) {
 692                 FreeXid(xid);
 693                 return -ENOMEM;
 694         }
 695
 696         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 697                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 698                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 699                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 700                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 701                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 702                 cFYI(1, ("posix del rc %d", rc));
 703                 if ((rc == 0) || (rc == -ENOENT))
 704                         goto psx_del_no_retry;
 705         }
 706
 707         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 708                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 709 psx_del_no_retry:
 710         if (!rc) {
 711                 if (direntry->d_inode)
 712                         drop_nlink(direntry->d_inode);
 713         } else if (rc == -ENOENT) {
 714                 d_drop(direntry);
 715         } else if (rc == -ETXTBSY) {
 716                 int oplock = 0;
 717                 __u16 netfid;
 718
 719                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 720                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 721                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 722                                  cifs_sb->mnt_cifs_flags &
 723                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 724                 if (rc == 0) {
 725                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 726                                               cifs_sb->local_nls,
 727                                               cifs_sb->mnt_cifs_flags &
 728                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 729                         CIFSSMBClose(xid, pTcon, netfid);
 730                         if (direntry->d_inode)
 731                                 drop_nlink(direntry->d_inode);
 732                 }
 733         } else if (rc == -EACCES) {
 734                 /* try only if r/o attribute set in local lookup data? */
 735                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 736                 if (pinfo_buf) {
 737                         /* ATTRS set to normal clears r/o bit */
 738                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 739                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 740                                 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
 741                                                      pinfo_buf,
 742                                                      cifs_sb->local_nls,
 743                                                      cifs_sb->mnt_cifs_flags &
 744                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 745                         else
 746                                 rc = -EOPNOTSUPP;
 747
 748                         if (rc == -EOPNOTSUPP) {
 749                                 int oplock = 0;
 750                                 __u16 netfid;
 751                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 752                                                           full_path,
 753                                                           (__u16)ATTR_NORMAL,
 754                                                           cifs_sb->local_nls);
 755                            For some strange reason it seems that NT4 eats the
 756                            old setattr call without actually setting the
 757                            attributes so on to the third attempted workaround
 758                            */
 759
 760                         /* BB could scan to see if we already have it open
 761                            and pass in pid of opener to function */
 762                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 763                                                  FILE_OPEN, SYNCHRONIZE |
 764                                                  FILE_WRITE_ATTRIBUTES, 0,
 765                                                  &netfid, &oplock, NULL,
 766                                                  cifs_sb->local_nls,
 767                                                  cifs_sb->mnt_cifs_flags &
 768                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 769                                 if (rc == 0) {
 770                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 771                                                                  pinfo_buf,
 772                                                                  netfid);
 773                                         CIFSSMBClose(xid, pTcon, netfid);
 774                                 }
 775                         }
 776                         kfree(pinfo_buf);
 777                 }
 778                 if (rc == 0) {
 779                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 780                                             cifs_sb->local_nls,
 781                                             cifs_sb->mnt_cifs_flags &
 782                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 783                         if (!rc) {
 784                                 if (direntry->d_inode)
 785                                         drop_nlink(direntry->d_inode);
 786                         } else if (rc == -ETXTBSY) {
 787                                 int oplock = 0;
 788                                 __u16 netfid;
 789
 790                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 791                                                  FILE_OPEN, DELETE,
 792                                                  CREATE_NOT_DIR |
 793                                                  CREATE_DELETE_ON_CLOSE,
 794                                                  &netfid, &oplock, NULL,
 795                                                  cifs_sb->local_nls,
 796                                                  cifs_sb->mnt_cifs_flags &
 797                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 798                                 if (rc == 0) {
 799                                         CIFSSMBRenameOpenFile(xid, pTcon,
 800                                                 netfid, NULL,
 801                                                 cifs_sb->local_nls,
 802                                                 cifs_sb->mnt_cifs_flags &
 803                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 804                                         CIFSSMBClose(xid, pTcon, netfid);
 805                                         if (direntry->d_inode)
 806                                                 drop_nlink(direntry->d_inode);
 807                                 }
 808                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 809                         }
 810                 }
 811         }
 812         if (direntry->d_inode) {
 813                 cifsInode = CIFS_I(direntry->d_inode);
 814                 cifsInode->time = 0;    /* will force revalidate to get info
 815                                            when needed */
 816                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 817         }
 818         if (inode) {
 819                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 820                 cifsInode = CIFS_I(inode);
 821                 cifsInode->time = 0;    /* force revalidate of dir as well */
 822         }
 823
 824         kfree(full_path);
 825         FreeXid(xid);
 826         return rc;
 827 }
 828
 829 static void posix_fill_in_inode(struct inode *tmp_inode,
 830         FILE_UNIX_BASIC_INFO *pData, int isNewInode)
 831 {
 832         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 833         loff_t local_size;
 834         struct timespec local_mtime;
 835
 836         cifsInfo->time = jiffies;
 837         atomic_inc(&cifsInfo->inUse);
 838
 839         /* save mtime and size */
 840         local_mtime = tmp_inode->i_mtime;
 841         local_size  = tmp_inode->i_size;
 842
 843         cifs_unix_info_to_inode(tmp_inode, pData, 1);
 844         cifs_set_ops(tmp_inode, false);
 845
 846         if (!S_ISREG(tmp_inode->i_mode))
 847                 return;
 848
 849         /*
 850          * No sense invalidating pages for new inode
 851          * since we we have not started caching
 852          * readahead file data yet.
 853          */
 854         if (isNewInode)
 855                 return;
 856
 857         if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 858                 (local_size == tmp_inode->i_size)) {
 859                 cFYI(1, ("inode exists but unchanged"));
 860         } else {
 861                 /* file may have changed on server */
 862                 cFYI(1, ("invalidate inode, readdir detected change"));
 863                 invalidate_remote_inode(tmp_inode);
 864         }
 865 }
 866
 867 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 868 {
 869         int rc = 0;
 870         int xid;
 871         struct cifs_sb_info *cifs_sb;
 872         struct cifsTconInfo *pTcon;
 873         char *full_path = NULL;
 874         struct inode *newinode = NULL;
 875
 876         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 877
 878         xid = GetXid();
 879
 880         cifs_sb = CIFS_SB(inode->i_sb);
 881         pTcon = cifs_sb->tcon;
 882
 883         full_path = build_path_from_dentry(direntry);
 884         if (full_path == NULL) {
 885                 FreeXid(xid);
 886                 return -ENOMEM;
 887         }
 888
 889         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 890                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 891                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 892                 u32 oplock = 0;
 893                 FILE_UNIX_BASIC_INFO *pInfo =
 894                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 895                 if (pInfo == NULL) {
 896                         rc = -ENOMEM;
 897                         goto mkdir_out;
 898                 }
 899
 900                 mode &= ~current->fs->umask;
 901                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 902                                 mode, NULL /* netfid */, pInfo, &oplock,
 903                                 full_path, cifs_sb->local_nls,
 904                                 cifs_sb->mnt_cifs_flags &
 905                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 906                 if (rc == -EOPNOTSUPP) {
 907                         kfree(pInfo);
 908                         goto mkdir_retry_old;
 909                 } else if (rc) {
 910                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 911                         d_drop(direntry);
 912                 } else {
 913                         if (pInfo->Type == cpu_to_le32(-1)) {
 914                                 /* no return info, go query for it */
 915                                 kfree(pInfo);
 916                                 goto mkdir_get_info;
 917                         }
 918 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 919         to set uid/gid */
 920                         inc_nlink(inode);
 921                         if (pTcon->nocase)
 922                                 direntry->d_op = &cifs_ci_dentry_ops;
 923                         else
 924                                 direntry->d_op = &cifs_dentry_ops;
 925
 926                         newinode = new_inode(inode->i_sb);
 927                         if (newinode == NULL) {
 928                                 kfree(pInfo);
 929                                 goto mkdir_get_info;
 930                         }
 931                         /* Is an i_ino of zero legal? */
 932                         /* Are there sanity checks we can use to ensure that
 933                            the server is really filling in that field? */
 934                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 935                                 newinode->i_ino =
 936                                         (unsigned long)pInfo->UniqueId;
 937                         } /* note ino incremented to unique num in new_inode */
 938                         if (inode->i_sb->s_flags & MS_NOATIME)
 939                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 940                         newinode->i_nlink = 2;
 941
 942                         insert_inode_hash(newinode);
 943                         d_instantiate(direntry, newinode);
 944
 945                         /* we already checked in POSIXCreate whether
 946                            frame was long enough */
 947                         posix_fill_in_inode(direntry->d_inode,
 948                                         pInfo, 1 /* NewInode */);
 949 #ifdef CONFIG_CIFS_DEBUG2
 950                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 951                                 direntry, direntry->d_name.name, newinode));
 952
 953                         if (newinode->i_nlink != 2)
 954                                 cFYI(1, ("unexpected number of links %d",
 955                                         newinode->i_nlink));
 956 #endif
 957                 }
 958                 kfree(pInfo);
 959                 goto mkdir_out;
 960         }
 961 mkdir_retry_old:
 962         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 963         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 964                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 965         if (rc) {
 966                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 967                 d_drop(direntry);
 968         } else {
 969 mkdir_get_info:
 970                 inc_nlink(inode);
 971                 if (pTcon->unix_ext)
 972                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 973                                                       inode->i_sb, xid);
 974                 else
 975                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 976                                                  inode->i_sb, xid, NULL);
 977
 978                 if (pTcon->nocase)
 979                         direntry->d_op = &cifs_ci_dentry_ops;
 980                 else
 981                         direntry->d_op = &cifs_dentry_ops;
 982                 d_instantiate(direntry, newinode);
 983                  /* setting nlink not necessary except in cases where we
 984                   * failed to get it from the server or was set bogus */
 985                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
 986                                 direntry->d_inode->i_nlink = 2;
 987                 mode &= ~current->fs->umask;
 988                 if (pTcon->unix_ext) {
 989                         struct cifs_unix_set_info_args args = {
 990                                 .mode   = mode,
 991                                 .ctime  = NO_CHANGE_64,
 992                                 .atime  = NO_CHANGE_64,
 993                                 .mtime  = NO_CHANGE_64,
 994                                 .device = 0,
 995                         };
 996                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 997                                 args.uid = (__u64)current->fsuid;
 998                                 args.gid = (__u64)current->fsgid;
 999                         } else {
1000                                 args.uid = NO_CHANGE_64;
1001                                 args.gid = NO_CHANGE_64;
1002                         }
1003                         CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1004                                             cifs_sb->local_nls,
1005                                             cifs_sb->mnt_cifs_flags &
1006                                             CIFS_MOUNT_MAP_SPECIAL_CHR);
1007                 } else {
1008                         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1009                             (mode & S_IWUGO) == 0) {
1010                                 FILE_BASIC_INFO pInfo;
1011                                 memset(&pInfo, 0, sizeof(pInfo));
1012                                 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1013                                 CIFSSMBSetPathInfo(xid, pTcon, full_path,
1014                                                 &pInfo, cifs_sb->local_nls,
1015                                                 cifs_sb->mnt_cifs_flags &
1016                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1017                         }
1018                         if (direntry->d_inode) {
1019                                 if (cifs_sb->mnt_cifs_flags &
1020                                      CIFS_MOUNT_DYNPERM)
1021                                         direntry->d_inode->i_mode =
1022                                                 (mode | S_IFDIR);
1023
1024                                 if (cifs_sb->mnt_cifs_flags &
1025                                      CIFS_MOUNT_SET_UID) {
1026                                         direntry->d_inode->i_uid =
1027                                                 current->fsuid;
1028                                         direntry->d_inode->i_gid =
1029                                                 current->fsgid;
1030                                 }
1031                         }
1032                 }
1033         }
1034 mkdir_out:
1035         kfree(full_path);
1036         FreeXid(xid);
1037         return rc;
1038 }
1039
1040 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1041 {
1042         int rc = 0;
1043         int xid;
1044         struct cifs_sb_info *cifs_sb;
1045         struct cifsTconInfo *pTcon;
1046         char *full_path = NULL;
1047         struct cifsInodeInfo *cifsInode;
1048
1049         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1050
1051         xid = GetXid();
1052
1053         cifs_sb = CIFS_SB(inode->i_sb);
1054         pTcon = cifs_sb->tcon;
1055
1056         full_path = build_path_from_dentry(direntry);
1057         if (full_path == NULL) {
1058                 FreeXid(xid);
1059                 return -ENOMEM;
1060         }
1061
1062         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1063                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1064
1065         if (!rc) {
1066                 drop_nlink(inode);
1067                 spin_lock(&direntry->d_inode->i_lock);
1068                 i_size_write(direntry->d_inode, 0);
1069                 clear_nlink(direntry->d_inode);
1070                 spin_unlock(&direntry->d_inode->i_lock);
1071         }
1072
1073         cifsInode = CIFS_I(direntry->d_inode);
1074         cifsInode->time = 0;    /* force revalidate to go get info when
1075                                    needed */
1076         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1077                 current_fs_time(inode->i_sb);
1078
1079         kfree(full_path);
1080         FreeXid(xid);
1081         return rc;
1082 }
1083
1084 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1085         struct inode *target_inode, struct dentry *target_direntry)
1086 {
1087         char *fromName;
1088         char *toName;
1089         struct cifs_sb_info *cifs_sb_source;
1090         struct cifs_sb_info *cifs_sb_target;
1091         struct cifsTconInfo *pTcon;
1092         int xid;
1093         int rc = 0;
1094
1095         xid = GetXid();
1096
1097         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1098         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1099         pTcon = cifs_sb_source->tcon;
1100
1101         if (pTcon != cifs_sb_target->tcon) {
1102                 FreeXid(xid);
1103                 return -EXDEV;  /* BB actually could be allowed if same server,
1104                                    but different share.
1105                                    Might eventually add support for this */
1106         }
1107
1108         /* we already  have the rename sem so we do not need to grab it again
1109            here to protect the path integrity */
1110         fromName = build_path_from_dentry(source_direntry);
1111         toName = build_path_from_dentry(target_direntry);
1112         if ((fromName == NULL) || (toName == NULL)) {
1113                 rc = -ENOMEM;
1114                 goto cifs_rename_exit;
1115         }
1116
1117         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1118                            cifs_sb_source->local_nls,
1119                            cifs_sb_source->mnt_cifs_flags &
1120                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1121         if (rc == -EEXIST) {
1122                 /* check if they are the same file because rename of hardlinked
1123                    files is a noop */
1124                 FILE_UNIX_BASIC_INFO *info_buf_source;
1125                 FILE_UNIX_BASIC_INFO *info_buf_target;
1126
1127                 info_buf_source =
1128                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1129                 if (info_buf_source != NULL) {
1130                         info_buf_target = info_buf_source + 1;
1131                         if (pTcon->unix_ext)
1132                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1133                                         info_buf_source,
1134                                         cifs_sb_source->local_nls,
1135                                         cifs_sb_source->mnt_cifs_flags &
1136                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1137                         /* else rc is still EEXIST so will fall through to
1138                            unlink the target and retry rename */
1139                         if (rc == 0) {
1140                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1141                                                 info_buf_target,
1142                                                 cifs_sb_target->local_nls,
1143                                                 /* remap based on source sb */
1144                                                 cifs_sb_source->mnt_cifs_flags &
1145                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1146                         }
1147                         if ((rc == 0) &&
1148                             (info_buf_source->UniqueId ==
1149                              info_buf_target->UniqueId)) {
1150                         /* do not rename since the files are hardlinked which
1151                            is a noop */
1152                         } else {
1153                         /* we either can not tell the files are hardlinked
1154                            (as with Windows servers) or files are not
1155                            hardlinked so delete the target manually before
1156                            renaming to follow POSIX rather than Windows
1157                            semantics */
1158                                 cifs_unlink(target_inode, target_direntry);
1159                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1160                                                    toName,
1161                                                    cifs_sb_source->local_nls,
1162                                                    cifs_sb_source->mnt_cifs_flags
1163                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1164                         }
1165                         kfree(info_buf_source);
1166                 } /* if we can not get memory just leave rc as EEXIST */
1167         }
1168
1169         if (rc)
1170                 cFYI(1, ("rename rc %d", rc));
1171
1172         if ((rc == -EIO) || (rc == -EEXIST)) {
1173                 int oplock = 0;
1174                 __u16 netfid;
1175
1176                 /* BB FIXME Is Generic Read correct for rename? */
1177                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1178                    need to test renaming open directory, also GENERIC_READ
1179                    might not right be right access to request */
1180                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1181                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1182                                  cifs_sb_source->local_nls,
1183                                  cifs_sb_source->mnt_cifs_flags &
1184                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1185                 if (rc == 0) {
1186                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1187                                               cifs_sb_source->local_nls,
1188                                               cifs_sb_source->mnt_cifs_flags &
1189                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1190                         CIFSSMBClose(xid, pTcon, netfid);
1191                 }
1192         }
1193
1194 cifs_rename_exit:
1195         kfree(fromName);
1196         kfree(toName);
1197         FreeXid(xid);
1198         return rc;
1199 }
1200
1201 int cifs_revalidate(struct dentry *direntry)
1202 {
1203         int xid;
1204         int rc = 0, wbrc = 0;
1205         char *full_path;
1206         struct cifs_sb_info *cifs_sb;
1207         struct cifsInodeInfo *cifsInode;
1208         loff_t local_size;
1209         struct timespec local_mtime;
1210         bool invalidate_inode = false;
1211
1212         if (direntry->d_inode == NULL)
1213                 return -ENOENT;
1214
1215         cifsInode = CIFS_I(direntry->d_inode);
1216
1217         if (cifsInode == NULL)
1218                 return -ENOENT;
1219
1220         /* no sense revalidating inode info on file that no one can write */
1221         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1222                 return rc;
1223
1224         xid = GetXid();
1225
1226         cifs_sb = CIFS_SB(direntry->d_sb);
1227
1228         /* can not safely grab the rename sem here if rename calls revalidate
1229            since that would deadlock */
1230         full_path = build_path_from_dentry(direntry);
1231         if (full_path == NULL) {
1232                 FreeXid(xid);
1233                 return -ENOMEM;
1234         }
1235         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1236                  "jiffies %ld", full_path, direntry->d_inode,
1237                  direntry->d_inode->i_count.counter, direntry,
1238                  direntry->d_time, jiffies));
1239
1240         if (cifsInode->time == 0) {
1241                 /* was set to zero previously to force revalidate */
1242         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1243                    lookupCacheEnabled) {
1244                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1245                     (direntry->d_inode->i_nlink == 1)) {
1246                         kfree(full_path);
1247                         FreeXid(xid);
1248                         return rc;
1249                 } else {
1250                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1251                 }
1252         }
1253
1254         /* save mtime and size */
1255         local_mtime = direntry->d_inode->i_mtime;
1256         local_size = direntry->d_inode->i_size;
1257
1258         if (cifs_sb->tcon->unix_ext) {
1259                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1260                                               direntry->d_sb, xid);
1261                 if (rc) {
1262                         cFYI(1, ("error on getting revalidate info %d", rc));
1263 /*                      if (rc != -ENOENT)
1264                                 rc = 0; */      /* BB should we cache info on
1265                                                    certain errors? */
1266                 }
1267         } else {
1268                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1269                                          direntry->d_sb, xid, NULL);
1270                 if (rc) {
1271                         cFYI(1, ("error on getting revalidate info %d", rc));
1272 /*                      if (rc != -ENOENT)
1273                                 rc = 0; */      /* BB should we cache info on
1274                                                    certain errors? */
1275                 }
1276         }
1277         /* should we remap certain errors, access denied?, to zero */
1278
1279         /* if not oplocked, we invalidate inode pages if mtime or file size
1280            had changed on server */
1281
1282         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1283             (local_size == direntry->d_inode->i_size)) {
1284                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1285         } else {
1286                 /* file may have changed on server */
1287                 if (cifsInode->clientCanCacheRead) {
1288                         /* no need to invalidate inode pages since we were the
1289                            only ones who could have modified the file and the
1290                            server copy is staler than ours */
1291                 } else {
1292                         invalidate_inode = true;
1293                 }
1294         }
1295
1296         /* can not grab this sem since kernel filesys locking documentation
1297            indicates i_mutex may be taken by the kernel on lookup and rename
1298            which could deadlock if we grab the i_mutex here as well */
1299 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1300         /* need to write out dirty pages here  */
1301         if (direntry->d_inode->i_mapping) {
1302                 /* do we need to lock inode until after invalidate completes
1303                    below? */
1304                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1305                 if (wbrc)
1306                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1307         }
1308         if (invalidate_inode) {
1309         /* shrink_dcache not necessary now that cifs dentry ops
1310         are exported for negative dentries */
1311 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1312                         shrink_dcache_parent(direntry); */
1313                 if (S_ISREG(direntry->d_inode->i_mode)) {
1314                         if (direntry->d_inode->i_mapping) {
1315                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1316                                 if (wbrc)
1317                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1318                         }
1319                         /* may eventually have to do this for open files too */
1320                         if (list_empty(&(cifsInode->openFileList))) {
1321                                 /* changed on server - flush read ahead pages */
1322                                 cFYI(1, ("Invalidating read ahead data on "
1323                                          "closed file"));
1324                                 invalidate_remote_inode(direntry->d_inode);
1325                         }
1326                 }
1327         }
1328 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1329
1330         kfree(full_path);
1331         FreeXid(xid);
1332         return rc;
1333 }
1334
1335 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1336         struct kstat *stat)
1337 {
1338         int err = cifs_revalidate(dentry);
1339         if (!err) {
1340                 generic_fillattr(dentry->d_inode, stat);
1341                 stat->blksize = CIFS_MAX_MSGSIZE;
1342         }
1343         return err;
1344 }
1345
1346 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1347 {
1348         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1349         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1350         struct page *page;
1351         int rc = 0;
1352
1353         page = grab_cache_page(mapping, index);
1354         if (!page)
1355                 return -ENOMEM;
1356
1357         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1358         unlock_page(page);
1359         page_cache_release(page);
1360         return rc;
1361 }
1362
1363 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1364 {
1365         struct address_space *mapping = inode->i_mapping;
1366         unsigned long limit;
1367
1368         spin_lock(&inode->i_lock);
1369         if (inode->i_size < offset)
1370                 goto do_expand;
1371         /*
1372          * truncation of in-use swapfiles is disallowed - it would cause
1373          * subsequent swapout to scribble on the now-freed blocks.
1374          */
1375         if (IS_SWAPFILE(inode)) {
1376                 spin_unlock(&inode->i_lock);
1377                 goto out_busy;
1378         }
1379         i_size_write(inode, offset);
1380         spin_unlock(&inode->i_lock);
1381         /*
1382          * unmap_mapping_range is called twice, first simply for efficiency
1383          * so that truncate_inode_pages does fewer single-page unmaps. However
1384          * after this first call, and before truncate_inode_pages finishes,
1385          * it is possible for private pages to be COWed, which remain after
1386          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1387          * call must be made for correctness.
1388          */
1389         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1390         truncate_inode_pages(mapping, offset);
1391         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1392         goto out_truncate;
1393
1394 do_expand:
1395         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1396         if (limit != RLIM_INFINITY && offset > limit) {
1397                 spin_unlock(&inode->i_lock);
1398                 goto out_sig;
1399         }
1400         if (offset > inode->i_sb->s_maxbytes) {
1401                 spin_unlock(&inode->i_lock);
1402                 goto out_big;
1403         }
1404         i_size_write(inode, offset);
1405         spin_unlock(&inode->i_lock);
1406 out_truncate:
1407         if (inode->i_op && inode->i_op->truncate)
1408                 inode->i_op->truncate(inode);
1409         return 0;
1410 out_sig:
1411         send_sig(SIGXFSZ, current, 0);
1412 out_big:
1413         return -EFBIG;
1414 out_busy:
1415         return -ETXTBSY;
1416 }
1417
1418 static int
1419 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1420                    int xid, char *full_path)
1421 {
1422         int rc;
1423         struct cifsFileInfo *open_file;
1424         struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1425         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1426         struct cifsTconInfo *pTcon = cifs_sb->tcon;
1427
1428         /*
1429          * To avoid spurious oplock breaks from server, in the case of
1430          * inodes that we already have open, avoid doing path based
1431          * setting of file size if we can do it by handle.
1432          * This keeps our caching token (oplock) and avoids timeouts
1433          * when the local oplock break takes longer to flush
1434          * writebehind data than the SMB timeout for the SetPathInfo
1435          * request would allow
1436          */
1437         open_file = find_writable_file(cifsInode);
1438         if (open_file) {
1439                 __u16 nfid = open_file->netfid;
1440                 __u32 npid = open_file->pid;
1441                 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1442                                         npid, false);
1443                 atomic_dec(&open_file->wrtPending);
1444                 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1445                 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1446                         unsigned int bytes_written;
1447                         rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1448                                           &bytes_written, NULL, NULL, 1);
1449                         cFYI(1, ("Wrt seteof rc %d", rc));
1450                 }
1451         } else
1452                 rc = -EINVAL;
1453
1454         if (rc != 0) {
1455                 /* Set file size by pathname rather than by handle
1456                    either because no valid, writeable file handle for
1457                    it was found or because there was an error setting
1458                    it by handle */
1459                 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1460                                    false, cifs_sb->local_nls,
1461                                    cifs_sb->mnt_cifs_flags &
1462                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1463                 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1464                 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1465                         __u16 netfid;
1466                         int oplock = 0;
1467
1468                         rc = SMBLegacyOpen(xid, pTcon, full_path,
1469                                 FILE_OPEN, GENERIC_WRITE,
1470                                 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1471                                 cifs_sb->local_nls,
1472                                 cifs_sb->mnt_cifs_flags &
1473                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1474                         if (rc == 0) {
1475                                 unsigned int bytes_written;
1476                                 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1477                                                   attrs->ia_size,
1478                                                   &bytes_written, NULL,
1479                                                   NULL, 1);
1480                                 cFYI(1, ("wrt seteof rc %d", rc));
1481                                 CIFSSMBClose(xid, pTcon, netfid);
1482                         }
1483                 }
1484         }
1485
1486         if (rc == 0) {
1487                 rc = cifs_vmtruncate(inode, attrs->ia_size);
1488                 cifs_truncate_page(inode->i_mapping, inode->i_size);
1489         }
1490
1491         return rc;
1492 }
1493
1494 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1495 {
1496         int xid;
1497         struct cifs_sb_info *cifs_sb;
1498         struct cifsTconInfo *pTcon;
1499         char *full_path = NULL;
1500         int rc = -EACCES;
1501         FILE_BASIC_INFO time_buf;
1502         bool set_time = false;
1503         bool set_dosattr = false;
1504         __u64 mode = NO_CHANGE_64;
1505         __u64 uid = NO_CHANGE_64;
1506         __u64 gid = NO_CHANGE_64;
1507         struct cifsInodeInfo *cifsInode;
1508         struct inode *inode = direntry->d_inode;
1509
1510         xid = GetXid();
1511
1512         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1513                  direntry->d_name.name, attrs->ia_valid));
1514
1515         cifs_sb = CIFS_SB(inode->i_sb);
1516         pTcon = cifs_sb->tcon;
1517
1518         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1519                 /* check if we have permission to change attrs */
1520                 rc = inode_change_ok(inode, attrs);
1521                 if (rc < 0) {
1522                         FreeXid(xid);
1523                         return rc;
1524                 } else
1525                         rc = 0;
1526         }
1527
1528         full_path = build_path_from_dentry(direntry);
1529         if (full_path == NULL) {
1530                 FreeXid(xid);
1531                 return -ENOMEM;
1532         }
1533         cifsInode = CIFS_I(inode);
1534
1535         if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1536                 /*
1537                    Flush data before changing file size or changing the last
1538                    write time of the file on the server. If the
1539                    flush returns error, store it to report later and continue.
1540                    BB: This should be smarter. Why bother flushing pages that
1541                    will be truncated anyway? Also, should we error out here if
1542                    the flush returns error?
1543                  */
1544                 rc = filemap_write_and_wait(inode->i_mapping);
1545                 if (rc != 0) {
1546                         cifsInode->write_behind_rc = rc;
1547                         rc = 0;
1548                 }
1549         }
1550
1551         if (attrs->ia_valid & ATTR_SIZE) {
1552                 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1553                 if (rc != 0)
1554                         goto cifs_setattr_exit;
1555         }
1556
1557         /*
1558          * Without unix extensions we can't send ownership changes to the
1559          * server, so silently ignore them. This is consistent with how
1560          * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1561          * CIFSACL support + proper Windows to Unix idmapping, we may be
1562          * able to support this in the future.
1563          */
1564         if (!pTcon->unix_ext &&
1565             !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) {
1566                 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1567         } else {
1568                 if (attrs->ia_valid & ATTR_UID) {
1569                         cFYI(1, ("UID changed to %d", attrs->ia_uid));
1570                         uid = attrs->ia_uid;
1571                 }
1572                 if (attrs->ia_valid & ATTR_GID) {
1573                         cFYI(1, ("GID changed to %d", attrs->ia_gid));
1574                         gid = attrs->ia_gid;
1575                 }
1576         }
1577
1578         time_buf.Attributes = 0;
1579
1580         /* skip mode change if it's just for clearing setuid/setgid */
1581         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1582                 attrs->ia_valid &= ~ATTR_MODE;
1583
1584         if (attrs->ia_valid & ATTR_MODE) {
1585                 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1586                 mode = attrs->ia_mode;
1587         }
1588
1589         if ((pTcon->unix_ext)
1590             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID))) {
1591                 struct cifs_unix_set_info_args args = {
1592                         .mode   = mode,
1593                         .uid    = uid,
1594                         .gid    = gid,
1595                         .ctime  = NO_CHANGE_64,
1596                         .atime  = NO_CHANGE_64,
1597                         .mtime  = NO_CHANGE_64,
1598                         .device = 0,
1599                 };
1600                 rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1601                                         cifs_sb->local_nls,
1602                                         cifs_sb->mnt_cifs_flags &
1603                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1604         } else if (attrs->ia_valid & ATTR_MODE) {
1605                 rc = 0;
1606 #ifdef CONFIG_CIFS_EXPERIMENTAL
1607                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1608                         rc = mode_to_acl(inode, full_path, mode);
1609                 else
1610 #endif
1611                 if (((mode & S_IWUGO) == 0) &&
1612                     (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1613                         set_dosattr = true;
1614                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs |
1615                                                           ATTR_READONLY);
1616                         /* fix up mode if we're not using dynperm */
1617                         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1618                                 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1619                 } else if ((mode & S_IWUGO) &&
1620                            (cifsInode->cifsAttrs & ATTR_READONLY)) {
1621                         /* If file is readonly on server, we would
1622                         not be able to write to it - so if any write
1623                         bit is enabled for user or group or other we
1624                         need to at least try to remove r/o dos attr */
1625                         set_dosattr = true;
1626                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1627                                             (~ATTR_READONLY));
1628                         /* Windows ignores set to zero */
1629                         if (time_buf.Attributes == 0)
1630                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1631
1632                         /* reset local inode permissions to normal */
1633                         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1634                                 attrs->ia_mode &= ~(S_IALLUGO);
1635                                 if (S_ISDIR(inode->i_mode))
1636                                         attrs->ia_mode |=
1637                                                 cifs_sb->mnt_dir_mode;
1638                                 else
1639                                         attrs->ia_mode |=
1640                                                 cifs_sb->mnt_file_mode;
1641                         }
1642                 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1643                         /* ignore mode change - ATTR_READONLY hasn't changed */
1644                         attrs->ia_valid &= ~ATTR_MODE;
1645                 }
1646         }
1647
1648         if (attrs->ia_valid & ATTR_ATIME) {
1649                 set_time = true;
1650                 time_buf.LastAccessTime =
1651                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1652         } else
1653                 time_buf.LastAccessTime = 0;
1654
1655         if (attrs->ia_valid & ATTR_MTIME) {
1656                 set_time = true;
1657                 time_buf.LastWriteTime =
1658                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1659         } else
1660                 time_buf.LastWriteTime = 0;
1661         /* Do not set ctime explicitly unless other time
1662            stamps are changed explicitly (i.e. by utime()
1663            since we would then have a mix of client and
1664            server times */
1665
1666         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1667                 set_time = true;
1668                 /* Although Samba throws this field away
1669                 it may be useful to Windows - but we do
1670                 not want to set ctime unless some other
1671                 timestamp is changing */
1672                 cFYI(1, ("CIFS - CTIME changed"));
1673                 time_buf.ChangeTime =
1674                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1675         } else
1676                 time_buf.ChangeTime = 0;
1677
1678         if (set_time || set_dosattr) {
1679                 time_buf.CreationTime = 0;      /* do not change */
1680                 /* In the future we should experiment - try setting timestamps
1681                    via Handle (SetFileInfo) instead of by path */
1682                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1683                         rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
1684                                              &time_buf, cifs_sb->local_nls,
1685                                              cifs_sb->mnt_cifs_flags &
1686                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1687                 else
1688                         rc = -EOPNOTSUPP;
1689
1690                 if (rc == -EOPNOTSUPP) {
1691                         int oplock = 0;
1692                         __u16 netfid;
1693
1694                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1695                                  "times not supported by this server"));
1696                         /* BB we could scan to see if we already have it open
1697                            and pass in pid of opener to function */
1698                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1699                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1700                                          CREATE_NOT_DIR, &netfid, &oplock,
1701                                          NULL, cifs_sb->local_nls,
1702                                          cifs_sb->mnt_cifs_flags &
1703                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1704                         if (rc == 0) {
1705                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1706                                                          netfid);
1707                                 CIFSSMBClose(xid, pTcon, netfid);
1708                         } else {
1709                         /* BB For even older servers we could convert time_buf
1710                            into old DOS style which uses two second
1711                            granularity */
1712
1713                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1714                                         &time_buf, cifs_sb->local_nls); */
1715                         }
1716                 }
1717                 /* Even if error on time set, no sense failing the call if
1718                 the server would set the time to a reasonable value anyway,
1719                 and this check ensures that we are not being called from
1720                 sys_utimes in which case we ought to fail the call back to
1721                 the user when the server rejects the call */
1722                 if ((rc) && (attrs->ia_valid &
1723                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1724                         rc = 0;
1725         }
1726
1727         /* do not need local check to inode_check_ok since the server does
1728            that */
1729         if (!rc)
1730                 rc = inode_setattr(inode, attrs);
1731 cifs_setattr_exit:
1732         kfree(full_path);
1733         FreeXid(xid);
1734         return rc;
1735 }
1736
1737 #if 0
1738 void cifs_delete_inode(struct inode *inode)
1739 {
1740         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1741         /* may have to add back in if and when safe distributed caching of
1742            directories added e.g. via FindNotify */
1743 }
1744 #endif