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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 int cifs_get_inode_info_unix(struct inode **pinode,
  33         const unsigned char *search_path, struct super_block *sb, int xid)
  34 {
  35         int rc = 0;
  36         FILE_UNIX_BASIC_INFO findData;
  37         struct cifsTconInfo *pTcon;
  38         struct inode *inode;
  39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  40         char *tmp_path;
  41
  42         pTcon = cifs_sb->tcon;
  43         cFYI(1, ("Getting info on %s", search_path));
  44         /* could have done a find first instead but this returns more info */
  45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  49                  sizeof(findData)); */
  50         if (rc) {
  51                 if (rc == -EREMOTE) {
  52                         tmp_path =
  53                             kmalloc(strnlen(pTcon->treeName,
  54                                             MAX_TREE_SIZE + 1) +
  55                                     strnlen(search_path, MAX_PATHCONF) + 1,
  56                                     GFP_KERNEL);
  57                         if (tmp_path == NULL) {
  58                                 return -ENOMEM;
  59                         }
  60                         /* have to skip first of the double backslash of
  61                            UNC name */
  62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  63                         strncat(tmp_path, search_path, MAX_PATHCONF);
  64                         rc = connect_to_dfs_path(xid, pTcon->ses,
  65                                                  /* treename + */ tmp_path,
  66                                                  cifs_sb->local_nls,
  67                                                  cifs_sb->mnt_cifs_flags &
  68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  69                         kfree(tmp_path);
  70
  71                         /* BB fix up inode etc. */
  72                 } else if (rc) {
  73                         return rc;
  74                 }
  75         } else {
  76                 struct cifsInodeInfo *cifsInfo;
  77                 __u32 type = le32_to_cpu(findData.Type);
  78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  80
  81                 /* get new inode */
  82                 if (*pinode == NULL) {
  83                         *pinode = new_inode(sb);
  84                         if (*pinode == NULL)
  85                                 return -ENOMEM;
  86                         /* Is an i_ino of zero legal? */
  87                         /* Are there sanity checks we can use to ensure that
  88                            the server is really filling in that field? */
  89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  90                                 (*pinode)->i_ino =
  91                                         (unsigned long)findData.UniqueId;
  92                         } /* note ino incremented to unique num in new_inode */
  93                         if (sb->s_flags & MS_NOATIME)
  94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
  95
  96                         insert_inode_hash(*pinode);
  97                 }
  98
  99                 inode = *pinode;
 100                 cifsInfo = CIFS_I(inode);
 101
 102                 cFYI(1, ("Old time %ld", cifsInfo->time));
 103                 cifsInfo->time = jiffies;
 104                 cFYI(1, ("New time %ld", cifsInfo->time));
 105                 /* this is ok to set on every inode revalidate */
 106                 atomic_set(&cifsInfo->inUse, 1);
 107
 108                 inode->i_atime =
 109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 110                 inode->i_mtime =
 111                     cifs_NTtimeToUnix(le64_to_cpu
 112                                 (findData.LastModificationTime));
 113                 inode->i_ctime =
 114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 115                 inode->i_mode = le64_to_cpu(findData.Permissions);
 116                 /* since we set the inode type below we need to mask off
 117                    to avoid strange results if bits set above */
 118                         inode->i_mode &= ~S_IFMT;
 119                 if (type == UNIX_FILE) {
 120                         inode->i_mode |= S_IFREG;
 121                 } else if (type == UNIX_SYMLINK) {
 122                         inode->i_mode |= S_IFLNK;
 123                 } else if (type == UNIX_DIR) {
 124                         inode->i_mode |= S_IFDIR;
 125                 } else if (type == UNIX_CHARDEV) {
 126                         inode->i_mode |= S_IFCHR;
 127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 129                 } else if (type == UNIX_BLOCKDEV) {
 130                         inode->i_mode |= S_IFBLK;
 131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 133                 } else if (type == UNIX_FIFO) {
 134                         inode->i_mode |= S_IFIFO;
 135                 } else if (type == UNIX_SOCKET) {
 136                         inode->i_mode |= S_IFSOCK;
 137                 } else {
 138                         /* safest to call it a file if we do not know */
 139                         inode->i_mode |= S_IFREG;
 140                         cFYI(1, ("unknown type %d", type));
 141                 }
 142
 143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 144                         inode->i_uid = cifs_sb->mnt_uid;
 145                 else
 146                         inode->i_uid = le64_to_cpu(findData.Uid);
 147
 148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 149                         inode->i_gid = cifs_sb->mnt_gid;
 150                 else
 151                         inode->i_gid = le64_to_cpu(findData.Gid);
 152
 153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 154
 155                 spin_lock(&inode->i_lock);
 156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 157                 /* can not safely change the file size here if the
 158                    client is writing to it due to potential races */
 159                         i_size_write(inode, end_of_file);
 160
 161                 /* blksize needs to be multiple of two. So safer to default to
 162                 blksize and blkbits set in superblock so 2**blkbits and blksize
 163                 will match rather than setting to:
 164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 165
 166                 /* This seems incredibly stupid but it turns out that i_blocks
 167                    is not related to (i_size / i_blksize), instead 512 byte size
 168                    is required for calculating num blocks */
 169
 170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 171                 /* for this calculation */
 172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 173                 }
 174                 spin_unlock(&inode->i_lock);
 175
 176                 if (num_of_bytes < end_of_file)
 177                         cFYI(1, ("allocation size less than end of file"));
 178                 cFYI(1, ("Size %ld and blocks %llu",
 179                         (unsigned long) inode->i_size,
 180                         (unsigned long long)inode->i_blocks));
 181                 if (S_ISREG(inode->i_mode)) {
 182                         cFYI(1, ("File inode"));
 183                         inode->i_op = &cifs_file_inode_ops;
 184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 186                                         inode->i_fop =
 187                                                 &cifs_file_direct_nobrl_ops;
 188                                 else
 189                                         inode->i_fop = &cifs_file_direct_ops;
 190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 191                                 inode->i_fop = &cifs_file_nobrl_ops;
 192                         else /* not direct, send byte range locks */
 193                                 inode->i_fop = &cifs_file_ops;
 194
 195                         /* check if server can support readpages */
 196                         if (pTcon->ses->server->maxBuf <
 197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 199                         else
 200                                 inode->i_data.a_ops = &cifs_addr_ops;
 201                 } else if (S_ISDIR(inode->i_mode)) {
 202                         cFYI(1, ("Directory inode"));
 203                         inode->i_op = &cifs_dir_inode_ops;
 204                         inode->i_fop = &cifs_dir_ops;
 205                 } else if (S_ISLNK(inode->i_mode)) {
 206                         cFYI(1, ("Symbolic Link inode"));
 207                         inode->i_op = &cifs_symlink_inode_ops;
 208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 209                 } else {
 210                         cFYI(1, ("Init special inode"));
 211                         init_special_inode(inode, inode->i_mode,
 212                                            inode->i_rdev);
 213                 }
 214         }
 215         return rc;
 216 }
 217
 218 static int decode_sfu_inode(struct inode *inode, __u64 size,
 219                             const unsigned char *path,
 220                             struct cifs_sb_info *cifs_sb, int xid)
 221 {
 222         int rc;
 223         int oplock = FALSE;
 224         __u16 netfid;
 225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 226         char buf[24];
 227         unsigned int bytes_read;
 228         char *pbuf;
 229
 230         pbuf = buf;
 231
 232         if (size == 0) {
 233                 inode->i_mode |= S_IFIFO;
 234                 return 0;
 235         } else if (size < 8) {
 236                 return -EINVAL;  /* EOPNOTSUPP? */
 237         }
 238
 239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 241                          cifs_sb->local_nls,
 242                          cifs_sb->mnt_cifs_flags &
 243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 244         if (rc == 0) {
 245                 int buf_type = CIFS_NO_BUFFER;
 246                         /* Read header */
 247                 rc = CIFSSMBRead(xid, pTcon,
 248                                  netfid,
 249                                  24 /* length */, 0 /* offset */,
 250                                  &bytes_read, &pbuf, &buf_type);
 251                 if ((rc == 0) && (bytes_read >= 8)) {
 252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 253                                 cFYI(1, ("Block device"));
 254                                 inode->i_mode |= S_IFBLK;
 255                                 if (bytes_read == 24) {
 256                                         /* we have enough to decode dev num */
 257                                         __u64 mjr; /* major */
 258                                         __u64 mnr; /* minor */
 259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 261                                         inode->i_rdev = MKDEV(mjr, mnr);
 262                                 }
 263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 264                                 cFYI(1, ("Char device"));
 265                                 inode->i_mode |= S_IFCHR;
 266                                 if (bytes_read == 24) {
 267                                         /* we have enough to decode dev num */
 268                                         __u64 mjr; /* major */
 269                                         __u64 mnr; /* minor */
 270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 272                                         inode->i_rdev = MKDEV(mjr, mnr);
 273                                 }
 274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 275                                 cFYI(1, ("Symlink"));
 276                                 inode->i_mode |= S_IFLNK;
 277                         } else {
 278                                 inode->i_mode |= S_IFREG; /* file? */
 279                                 rc = -EOPNOTSUPP;
 280                         }
 281                 } else {
 282                         inode->i_mode |= S_IFREG; /* then it is a file */
 283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 284                 }
 285                 CIFSSMBClose(xid, pTcon, netfid);
 286         }
 287         return rc;
 288 }
 289
 290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 291
 292 static int get_sfu_uid_mode(struct inode *inode,
 293                         const unsigned char *path,
 294                         struct cifs_sb_info *cifs_sb, int xid)
 295 {
 296 #ifdef CONFIG_CIFS_XATTR
 297         ssize_t rc;
 298         char ea_value[4];
 299         __u32 mode;
 300
 301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 304         if (rc < 0)
 305                 return (int)rc;
 306         else if (rc > 3) {
 307                 mode = le32_to_cpu(*((__le32 *)ea_value));
 308                 inode->i_mode &= ~SFBITS_MASK;
 309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 311                 cFYI(1, ("special mode bits 0%o", mode));
 312                 return 0;
 313         } else {
 314                 return 0;
 315         }
 316 #else
 317         return -EOPNOTSUPP;
 318 #endif
 319 }
 320
 321 int cifs_get_inode_info(struct inode **pinode,
 322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 323         struct super_block *sb, int xid)
 324 {
 325         int rc = 0;
 326         struct cifsTconInfo *pTcon;
 327         struct inode *inode;
 328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 329         char *tmp_path;
 330         char *buf = NULL;
 331         int adjustTZ = FALSE;
 332
 333         pTcon = cifs_sb->tcon;
 334         cFYI(1, ("Getting info on %s", search_path));
 335
 336         if ((pfindData == NULL) && (*pinode != NULL)) {
 337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 338                         cFYI(1, ("No need to revalidate cached inode sizes"));
 339                         return rc;
 340                 }
 341         }
 342
 343         /* if file info not passed in then get it from server */
 344         if (pfindData == NULL) {
 345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 346                 if (buf == NULL)
 347                         return -ENOMEM;
 348                 pfindData = (FILE_ALL_INFO *)buf;
 349                 /* could do find first instead but this returns more info */
 350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 351                               0 /* not legacy */,
 352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 354                 /* BB optimize code so we do not make the above call
 355                 when server claims no NT SMB support and the above call
 356                 failed at least once - set flag in tcon or mount */
 357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 358                         rc = SMBQueryInformation(xid, pTcon, search_path,
 359                                         pfindData, cifs_sb->local_nls,
 360                                         cifs_sb->mnt_cifs_flags &
 361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 362                         adjustTZ = TRUE;
 363                 }
 364         }
 365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 366         if (rc) {
 367                 if (rc == -EREMOTE) {
 368                         tmp_path =
 369                             kmalloc(strnlen
 370                                     (pTcon->treeName,
 371                                      MAX_TREE_SIZE + 1) +
 372                                     strnlen(search_path, MAX_PATHCONF) + 1,
 373                                     GFP_KERNEL);
 374                         if (tmp_path == NULL) {
 375                                 kfree(buf);
 376                                 return -ENOMEM;
 377                         }
 378
 379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 380                         strncat(tmp_path, search_path, MAX_PATHCONF);
 381                         rc = connect_to_dfs_path(xid, pTcon->ses,
 382                                                  /* treename + */ tmp_path,
 383                                                  cifs_sb->local_nls,
 384                                                  cifs_sb->mnt_cifs_flags &
 385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 386                         kfree(tmp_path);
 387                         /* BB fix up inode etc. */
 388                 } else if (rc) {
 389                         kfree(buf);
 390                         return rc;
 391                 }
 392         } else {
 393                 struct cifsInodeInfo *cifsInfo;
 394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 395
 396                 /* get new inode */
 397                 if (*pinode == NULL) {
 398                         *pinode = new_inode(sb);
 399                         if (*pinode == NULL) {
 400                                 kfree(buf);
 401                                 return -ENOMEM;
 402                         }
 403                         /* Is an i_ino of zero legal? Can we use that to check
 404                            if the server supports returning inode numbers?  Are
 405                            there other sanity checks we can use to ensure that
 406                            the server is really filling in that field? */
 407
 408                         /* We can not use the IndexNumber field by default from
 409                            Windows or Samba (in ALL_INFO buf) but we can request
 410                            it explicitly.  It may not be unique presumably if
 411                            the server has multiple devices mounted under one
 412                            share */
 413
 414                         /* There may be higher info levels that work but are
 415                            there Windows server or network appliances for which
 416                            IndexNumber field is not guaranteed unique? */
 417
 418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 419                                 int rc1 = 0;
 420                                 __u64 inode_num;
 421
 422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 423                                         search_path, &inode_num,
 424                                         cifs_sb->local_nls,
 425                                         cifs_sb->mnt_cifs_flags &
 426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 427                                 if (rc1) {
 428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 430                                 } else /* do we need cast or hash to ino? */
 431                                         (*pinode)->i_ino = inode_num;
 432                         } /* else ino incremented to unique num in new_inode*/
 433                         if (sb->s_flags & MS_NOATIME)
 434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 435                         insert_inode_hash(*pinode);
 436                 }
 437                 inode = *pinode;
 438                 cifsInfo = CIFS_I(inode);
 439                 cifsInfo->cifsAttrs = attr;
 440                 cFYI(1, ("Old time %ld", cifsInfo->time));
 441                 cifsInfo->time = jiffies;
 442                 cFYI(1, ("New time %ld", cifsInfo->time));
 443
 444                 /* blksize needs to be multiple of two. So safer to default to
 445                 blksize and blkbits set in superblock so 2**blkbits and blksize
 446                 will match rather than setting to:
 447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 448
 449                 /* Linux can not store file creation time so ignore it */
 450                 if (pfindData->LastAccessTime)
 451                         inode->i_atime = cifs_NTtimeToUnix
 452                                 (le64_to_cpu(pfindData->LastAccessTime));
 453                 else /* do not need to use current_fs_time - time not stored */
 454                         inode->i_atime = CURRENT_TIME;
 455                 inode->i_mtime =
 456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 457                 inode->i_ctime =
 458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 459                 cFYI(0, ("Attributes came in as 0x%x", attr));
 460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 463                 }
 464
 465                 /* set default mode. will override for dirs below */
 466                 if (atomic_read(&cifsInfo->inUse) == 0)
 467                         /* new inode, can safely set these fields */
 468                         inode->i_mode = cifs_sb->mnt_file_mode;
 469                 else /* since we set the inode type below we need to mask off
 470                      to avoid strange results if type changes and both
 471                      get orred in */
 472                         inode->i_mode &= ~S_IFMT;
 473 /*              if (attr & ATTR_REPARSE)  */
 474                 /* We no longer handle these as symlinks because we could not
 475                    follow them due to the absolute path with drive letter */
 476                 if (attr & ATTR_DIRECTORY) {
 477                 /* override default perms since we do not do byte range locking
 478                    on dirs */
 479                         inode->i_mode = cifs_sb->mnt_dir_mode;
 480                         inode->i_mode |= S_IFDIR;
 481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 483                            /* No need to le64 convert size of zero */
 484                            (pfindData->EndOfFile == 0)) {
 485                         inode->i_mode = cifs_sb->mnt_file_mode;
 486                         inode->i_mode |= S_IFIFO;
 487 /* BB Finish for SFU style symlinks and devices */
 488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 490                         if (decode_sfu_inode(inode,
 491                                          le64_to_cpu(pfindData->EndOfFile),
 492                                          search_path,
 493                                          cifs_sb, xid)) {
 494                                 cFYI(1, ("Unrecognized sfu inode type"));
 495                         }
 496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
 497                 } else {
 498                         inode->i_mode |= S_IFREG;
 499                         /* treat the dos attribute of read-only as read-only
 500                            mode e.g. 555 */
 501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 502                                 inode->i_mode &= ~(S_IWUGO);
 503                         else if ((inode->i_mode & S_IWUGO) == 0)
 504                                 /* the ATTR_READONLY flag may have been */
 505                                 /* changed on server -- set any w bits  */
 506                                 /* allowed by mnt_file_mode             */
 507                                 inode->i_mode |= (S_IWUGO &
 508                                                   cifs_sb->mnt_file_mode);
 509                 /* BB add code here -
 510                    validate if device or weird share or device type? */
 511                 }
 512
 513                 spin_lock(&inode->i_lock);
 514                 if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
 515                         /* can not safely shrink the file size here if the
 516                            client is writing to it due to potential races */
 517                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 518
 519                         /* 512 bytes (2**9) is the fake blocksize that must be
 520                            used for this calculation */
 521                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 522                                            pfindData->AllocationSize)) >> 9;
 523                 }
 524                 spin_unlock(&inode->i_lock);
 525
 526                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 527
 528                 /* BB fill in uid and gid here? with help from winbind?
 529                    or retrieve from NTFS stream extended attribute */
 530                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 531                         /* fill in uid, gid, mode from server ACL */
 532                         /* BB FIXME this should also take into account the
 533                          * default uid specified on mount if present */
 534                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
 535                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 536                         inode->i_uid = cifs_sb->mnt_uid;
 537                         inode->i_gid = cifs_sb->mnt_gid;
 538                         /* set so we do not keep refreshing these fields with
 539                            bad data after user has changed them in memory */
 540                         atomic_set(&cifsInfo->inUse, 1);
 541                 }
 542
 543                 if (S_ISREG(inode->i_mode)) {
 544                         cFYI(1, ("File inode"));
 545                         inode->i_op = &cifs_file_inode_ops;
 546                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 547                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 548                                         inode->i_fop =
 549                                                 &cifs_file_direct_nobrl_ops;
 550                                 else
 551                                         inode->i_fop = &cifs_file_direct_ops;
 552                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 553                                 inode->i_fop = &cifs_file_nobrl_ops;
 554                         else /* not direct, send byte range locks */
 555                                 inode->i_fop = &cifs_file_ops;
 556
 557                         if (pTcon->ses->server->maxBuf <
 558                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 559                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 560                         else
 561                                 inode->i_data.a_ops = &cifs_addr_ops;
 562                 } else if (S_ISDIR(inode->i_mode)) {
 563                         cFYI(1, ("Directory inode"));
 564                         inode->i_op = &cifs_dir_inode_ops;
 565                         inode->i_fop = &cifs_dir_ops;
 566                 } else if (S_ISLNK(inode->i_mode)) {
 567                         cFYI(1, ("Symbolic Link inode"));
 568                         inode->i_op = &cifs_symlink_inode_ops;
 569                 } else {
 570                         init_special_inode(inode, inode->i_mode,
 571                                            inode->i_rdev);
 572                 }
 573         }
 574         kfree(buf);
 575         return rc;
 576 }
 577
 578 /* gets root inode */
 579 void cifs_read_inode(struct inode *inode)
 580 {
 581         int xid;
 582         struct cifs_sb_info *cifs_sb;
 583
 584         cifs_sb = CIFS_SB(inode->i_sb);
 585         xid = GetXid();
 586
 587         if (cifs_sb->tcon->unix_ext)
 588                 cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 589         else
 590                 cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 591         /* can not call macro FreeXid here since in a void func */
 592         _FreeXid(xid);
 593 }
 594
 595 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 596 {
 597         int rc = 0;
 598         int xid;
 599         struct cifs_sb_info *cifs_sb;
 600         struct cifsTconInfo *pTcon;
 601         char *full_path = NULL;
 602         struct cifsInodeInfo *cifsInode;
 603         FILE_BASIC_INFO *pinfo_buf;
 604
 605         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 606
 607         xid = GetXid();
 608
 609         if (inode)
 610                 cifs_sb = CIFS_SB(inode->i_sb);
 611         else
 612                 cifs_sb = CIFS_SB(direntry->d_sb);
 613         pTcon = cifs_sb->tcon;
 614
 615         /* Unlink can be called from rename so we can not grab the sem here
 616            since we deadlock otherwise */
 617 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 618         full_path = build_path_from_dentry(direntry);
 619 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 620         if (full_path == NULL) {
 621                 FreeXid(xid);
 622                 return -ENOMEM;
 623         }
 624
 625         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 626                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 627                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 628                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 629                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 630                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 631                 cFYI(1, ("posix del rc %d", rc));
 632                 if ((rc == 0) || (rc == -ENOENT))
 633                         goto psx_del_no_retry;
 634         }
 635
 636         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 637                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 638 psx_del_no_retry:
 639         if (!rc) {
 640                 if (direntry->d_inode)
 641                         drop_nlink(direntry->d_inode);
 642         } else if (rc == -ENOENT) {
 643                 d_drop(direntry);
 644         } else if (rc == -ETXTBSY) {
 645                 int oplock = FALSE;
 646                 __u16 netfid;
 647
 648                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 649                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 650                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 651                                  cifs_sb->mnt_cifs_flags &
 652                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 653                 if (rc == 0) {
 654                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 655                                               cifs_sb->local_nls,
 656                                               cifs_sb->mnt_cifs_flags &
 657                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 658                         CIFSSMBClose(xid, pTcon, netfid);
 659                         if (direntry->d_inode)
 660                                 drop_nlink(direntry->d_inode);
 661                 }
 662         } else if (rc == -EACCES) {
 663                 /* try only if r/o attribute set in local lookup data? */
 664                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 665                 if (pinfo_buf) {
 666                         /* ATTRS set to normal clears r/o bit */
 667                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 668                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 669                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 670                                                      pinfo_buf,
 671                                                      cifs_sb->local_nls,
 672                                                      cifs_sb->mnt_cifs_flags &
 673                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 674                         else
 675                                 rc = -EOPNOTSUPP;
 676
 677                         if (rc == -EOPNOTSUPP) {
 678                                 int oplock = FALSE;
 679                                 __u16 netfid;
 680                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 681                                                           full_path,
 682                                                           (__u16)ATTR_NORMAL,
 683                                                           cifs_sb->local_nls);
 684                            For some strange reason it seems that NT4 eats the
 685                            old setattr call without actually setting the
 686                            attributes so on to the third attempted workaround
 687                            */
 688
 689                         /* BB could scan to see if we already have it open
 690                            and pass in pid of opener to function */
 691                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 692                                                  FILE_OPEN, SYNCHRONIZE |
 693                                                  FILE_WRITE_ATTRIBUTES, 0,
 694                                                  &netfid, &oplock, NULL,
 695                                                  cifs_sb->local_nls,
 696                                                  cifs_sb->mnt_cifs_flags &
 697                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 698                                 if (rc == 0) {
 699                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 700                                                                  pinfo_buf,
 701                                                                  netfid);
 702                                         CIFSSMBClose(xid, pTcon, netfid);
 703                                 }
 704                         }
 705                         kfree(pinfo_buf);
 706                 }
 707                 if (rc == 0) {
 708                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 709                                             cifs_sb->local_nls,
 710                                             cifs_sb->mnt_cifs_flags &
 711                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 712                         if (!rc) {
 713                                 if (direntry->d_inode)
 714                                         drop_nlink(direntry->d_inode);
 715                         } else if (rc == -ETXTBSY) {
 716                                 int oplock = FALSE;
 717                                 __u16 netfid;
 718
 719                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 720                                                  FILE_OPEN, DELETE,
 721                                                  CREATE_NOT_DIR |
 722                                                  CREATE_DELETE_ON_CLOSE,
 723                                                  &netfid, &oplock, NULL,
 724                                                  cifs_sb->local_nls,
 725                                                  cifs_sb->mnt_cifs_flags &
 726                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 727                                 if (rc == 0) {
 728                                         CIFSSMBRenameOpenFile(xid, pTcon,
 729                                                 netfid, NULL,
 730                                                 cifs_sb->local_nls,
 731                                                 cifs_sb->mnt_cifs_flags &
 732                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 733                                         CIFSSMBClose(xid, pTcon, netfid);
 734                                         if (direntry->d_inode)
 735                                                 drop_nlink(direntry->d_inode);
 736                                 }
 737                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 738                         }
 739                 }
 740         }
 741         if (direntry->d_inode) {
 742                 cifsInode = CIFS_I(direntry->d_inode);
 743                 cifsInode->time = 0;    /* will force revalidate to get info
 744                                            when needed */
 745                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 746         }
 747         if (inode) {
 748                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 749                 cifsInode = CIFS_I(inode);
 750                 cifsInode->time = 0;    /* force revalidate of dir as well */
 751         }
 752
 753         kfree(full_path);
 754         FreeXid(xid);
 755         return rc;
 756 }
 757
 758 static void posix_fill_in_inode(struct inode *tmp_inode,
 759         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 760 {
 761         loff_t local_size;
 762         struct timespec local_mtime;
 763
 764         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 765         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 766
 767         __u32 type = le32_to_cpu(pData->Type);
 768         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 769         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 770         cifsInfo->time = jiffies;
 771         atomic_inc(&cifsInfo->inUse);
 772
 773         /* save mtime and size */
 774         local_mtime = tmp_inode->i_mtime;
 775         local_size  = tmp_inode->i_size;
 776
 777         tmp_inode->i_atime =
 778             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 779         tmp_inode->i_mtime =
 780             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 781         tmp_inode->i_ctime =
 782             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 783
 784         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 785         /* since we set the inode type below we need to mask off type
 786            to avoid strange results if bits above were corrupt */
 787         tmp_inode->i_mode &= ~S_IFMT;
 788         if (type == UNIX_FILE) {
 789                 *pobject_type = DT_REG;
 790                 tmp_inode->i_mode |= S_IFREG;
 791         } else if (type == UNIX_SYMLINK) {
 792                 *pobject_type = DT_LNK;
 793                 tmp_inode->i_mode |= S_IFLNK;
 794         } else if (type == UNIX_DIR) {
 795                 *pobject_type = DT_DIR;
 796                 tmp_inode->i_mode |= S_IFDIR;
 797         } else if (type == UNIX_CHARDEV) {
 798                 *pobject_type = DT_CHR;
 799                 tmp_inode->i_mode |= S_IFCHR;
 800                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 801                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 802         } else if (type == UNIX_BLOCKDEV) {
 803                 *pobject_type = DT_BLK;
 804                 tmp_inode->i_mode |= S_IFBLK;
 805                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 806                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 807         } else if (type == UNIX_FIFO) {
 808                 *pobject_type = DT_FIFO;
 809                 tmp_inode->i_mode |= S_IFIFO;
 810         } else if (type == UNIX_SOCKET) {
 811                 *pobject_type = DT_SOCK;
 812                 tmp_inode->i_mode |= S_IFSOCK;
 813         } else {
 814                 /* safest to just call it a file */
 815                 *pobject_type = DT_REG;
 816                 tmp_inode->i_mode |= S_IFREG;
 817                 cFYI(1, ("unknown inode type %d", type));
 818         }
 819
 820 #ifdef CONFIG_CIFS_DEBUG2
 821         cFYI(1, ("object type: %d", type));
 822 #endif
 823         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 824         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 825         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 826
 827         spin_lock(&tmp_inode->i_lock);
 828         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 829                 /* can not safely change the file size here if the
 830                 client is writing to it due to potential races */
 831                 i_size_write(tmp_inode, end_of_file);
 832
 833         /* 512 bytes (2**9) is the fake blocksize that must be used */
 834         /* for this calculation, not the real blocksize */
 835                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 836         }
 837         spin_unlock(&tmp_inode->i_lock);
 838
 839         if (S_ISREG(tmp_inode->i_mode)) {
 840                 cFYI(1, ("File inode"));
 841                 tmp_inode->i_op = &cifs_file_inode_ops;
 842
 843                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 844                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 845                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 846                         else
 847                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 848
 849                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 850                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 851                 else
 852                         tmp_inode->i_fop = &cifs_file_ops;
 853
 854                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 855                    (cifs_sb->tcon->ses->server->maxBuf <
 856                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 857                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 858                 else
 859                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 860
 861                 if (isNewInode)
 862                         return; /* No sense invalidating pages for new inode
 863                                    since we we have not started caching
 864                                    readahead file data yet */
 865
 866                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 867                         (local_size == tmp_inode->i_size)) {
 868                         cFYI(1, ("inode exists but unchanged"));
 869                 } else {
 870                         /* file may have changed on server */
 871                         cFYI(1, ("invalidate inode, readdir detected change"));
 872                         invalidate_remote_inode(tmp_inode);
 873                 }
 874         } else if (S_ISDIR(tmp_inode->i_mode)) {
 875                 cFYI(1, ("Directory inode"));
 876                 tmp_inode->i_op = &cifs_dir_inode_ops;
 877                 tmp_inode->i_fop = &cifs_dir_ops;
 878         } else if (S_ISLNK(tmp_inode->i_mode)) {
 879                 cFYI(1, ("Symbolic Link inode"));
 880                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 881 /* tmp_inode->i_fop = *//* do not need to set to anything */
 882         } else {
 883                 cFYI(1, ("Special inode"));
 884                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 885                                    tmp_inode->i_rdev);
 886         }
 887 }
 888
 889 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 890 {
 891         int rc = 0;
 892         int xid;
 893         struct cifs_sb_info *cifs_sb;
 894         struct cifsTconInfo *pTcon;
 895         char *full_path = NULL;
 896         struct inode *newinode = NULL;
 897
 898         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 899
 900         xid = GetXid();
 901
 902         cifs_sb = CIFS_SB(inode->i_sb);
 903         pTcon = cifs_sb->tcon;
 904
 905         full_path = build_path_from_dentry(direntry);
 906         if (full_path == NULL) {
 907                 FreeXid(xid);
 908                 return -ENOMEM;
 909         }
 910
 911         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 912                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 913                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 914                 u32 oplock = 0;
 915                 FILE_UNIX_BASIC_INFO * pInfo =
 916                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 917                 if (pInfo == NULL) {
 918                         rc = -ENOMEM;
 919                         goto mkdir_out;
 920                 }
 921
 922                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 923                                 mode, NULL /* netfid */, pInfo, &oplock,
 924                                 full_path, cifs_sb->local_nls,
 925                                 cifs_sb->mnt_cifs_flags &
 926                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 927                 if (rc) {
 928                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 929                         d_drop(direntry);
 930                 } else {
 931                         int obj_type;
 932                         if (pInfo->Type == -1) /* no return info - go query */
 933                                 goto mkdir_get_info;
 934 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 935         to set uid/gid */
 936                         inc_nlink(inode);
 937                         if (pTcon->nocase)
 938                                 direntry->d_op = &cifs_ci_dentry_ops;
 939                         else
 940                                 direntry->d_op = &cifs_dentry_ops;
 941
 942                         newinode = new_inode(inode->i_sb);
 943                         if (newinode == NULL)
 944                                 goto mkdir_get_info;
 945                         /* Is an i_ino of zero legal? */
 946                         /* Are there sanity checks we can use to ensure that
 947                            the server is really filling in that field? */
 948                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 949                                 newinode->i_ino =
 950                                         (unsigned long)pInfo->UniqueId;
 951                         } /* note ino incremented to unique num in new_inode */
 952                         if (inode->i_sb->s_flags & MS_NOATIME)
 953                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 954                         newinode->i_nlink = 2;
 955
 956                         insert_inode_hash(newinode);
 957                         d_instantiate(direntry, newinode);
 958
 959                         /* we already checked in POSIXCreate whether
 960                            frame was long enough */
 961                         posix_fill_in_inode(direntry->d_inode,
 962                                         pInfo, &obj_type, 1 /* NewInode */);
 963 #ifdef CONFIG_CIFS_DEBUG2
 964                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 965                                 direntry, direntry->d_name.name, newinode));
 966
 967                         if (newinode->i_nlink != 2)
 968                                 cFYI(1, ("unexpected number of links %d",
 969                                         newinode->i_nlink));
 970 #endif
 971                 }
 972                 kfree(pInfo);
 973                 goto mkdir_out;
 974         }
 975
 976         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 977         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 978                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 979         if (rc) {
 980                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 981                 d_drop(direntry);
 982         } else {
 983 mkdir_get_info:
 984                 inc_nlink(inode);
 985                 if (pTcon->unix_ext)
 986                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 987                                                       inode->i_sb, xid);
 988                 else
 989                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 990                                                  inode->i_sb, xid);
 991
 992                 if (pTcon->nocase)
 993                         direntry->d_op = &cifs_ci_dentry_ops;
 994                 else
 995                         direntry->d_op = &cifs_dentry_ops;
 996                 d_instantiate(direntry, newinode);
 997                  /* setting nlink not necessary except in cases where we
 998                   * failed to get it from the server or was set bogus */
 999                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1000                                 direntry->d_inode->i_nlink = 2;
1001                 if (pTcon->unix_ext) {
1002                         mode &= ~current->fs->umask;
1003                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1004                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1005                                                     mode,
1006                                                     (__u64)current->fsuid,
1007                                                     (__u64)current->fsgid,
1008                                                     0 /* dev_t */,
1009                                                     cifs_sb->local_nls,
1010                                                     cifs_sb->mnt_cifs_flags &
1011                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1012                         } else {
1013                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1014                                                     mode, (__u64)-1,
1015                                                     (__u64)-1, 0 /* dev_t */,
1016                                                     cifs_sb->local_nls,
1017                                                     cifs_sb->mnt_cifs_flags &
1018                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1019                         }
1020                 } else {
1021                         /* BB to be implemented via Windows secrty descriptors
1022                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1023                                                  -1, -1, local_nls); */
1024                         if (direntry->d_inode) {
1025                                 direntry->d_inode->i_mode = mode;
1026                                 direntry->d_inode->i_mode |= S_IFDIR;
1027                                 if (cifs_sb->mnt_cifs_flags &
1028                                      CIFS_MOUNT_SET_UID) {
1029                                         direntry->d_inode->i_uid =
1030                                                 current->fsuid;
1031                                         direntry->d_inode->i_gid =
1032                                                 current->fsgid;
1033                                 }
1034                         }
1035                 }
1036         }
1037 mkdir_out:
1038         kfree(full_path);
1039         FreeXid(xid);
1040         return rc;
1041 }
1042
1043 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1044 {
1045         int rc = 0;
1046         int xid;
1047         struct cifs_sb_info *cifs_sb;
1048         struct cifsTconInfo *pTcon;
1049         char *full_path = NULL;
1050         struct cifsInodeInfo *cifsInode;
1051
1052         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1053
1054         xid = GetXid();
1055
1056         cifs_sb = CIFS_SB(inode->i_sb);
1057         pTcon = cifs_sb->tcon;
1058
1059         full_path = build_path_from_dentry(direntry);
1060         if (full_path == NULL) {
1061                 FreeXid(xid);
1062                 return -ENOMEM;
1063         }
1064
1065         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1066                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1067
1068         if (!rc) {
1069                 drop_nlink(inode);
1070                 spin_lock(&direntry->d_inode->i_lock);
1071                 i_size_write(direntry->d_inode, 0);
1072                 clear_nlink(direntry->d_inode);
1073                 spin_unlock(&direntry->d_inode->i_lock);
1074         }
1075
1076         cifsInode = CIFS_I(direntry->d_inode);
1077         cifsInode->time = 0;    /* force revalidate to go get info when
1078                                    needed */
1079         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1080                 current_fs_time(inode->i_sb);
1081
1082         kfree(full_path);
1083         FreeXid(xid);
1084         return rc;
1085 }
1086
1087 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1088         struct inode *target_inode, struct dentry *target_direntry)
1089 {
1090         char *fromName;
1091         char *toName;
1092         struct cifs_sb_info *cifs_sb_source;
1093         struct cifs_sb_info *cifs_sb_target;
1094         struct cifsTconInfo *pTcon;
1095         int xid;
1096         int rc = 0;
1097
1098         xid = GetXid();
1099
1100         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1101         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1102         pTcon = cifs_sb_source->tcon;
1103
1104         if (pTcon != cifs_sb_target->tcon) {
1105                 FreeXid(xid);
1106                 return -EXDEV;  /* BB actually could be allowed if same server,
1107                                    but different share.
1108                                    Might eventually add support for this */
1109         }
1110
1111         /* we already  have the rename sem so we do not need to grab it again
1112            here to protect the path integrity */
1113         fromName = build_path_from_dentry(source_direntry);
1114         toName = build_path_from_dentry(target_direntry);
1115         if ((fromName == NULL) || (toName == NULL)) {
1116                 rc = -ENOMEM;
1117                 goto cifs_rename_exit;
1118         }
1119
1120         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1121                            cifs_sb_source->local_nls,
1122                            cifs_sb_source->mnt_cifs_flags &
1123                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1124         if (rc == -EEXIST) {
1125                 /* check if they are the same file because rename of hardlinked
1126                    files is a noop */
1127                 FILE_UNIX_BASIC_INFO *info_buf_source;
1128                 FILE_UNIX_BASIC_INFO *info_buf_target;
1129
1130                 info_buf_source =
1131                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1132                 if (info_buf_source != NULL) {
1133                         info_buf_target = info_buf_source + 1;
1134                         if (pTcon->unix_ext)
1135                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1136                                         info_buf_source,
1137                                         cifs_sb_source->local_nls,
1138                                         cifs_sb_source->mnt_cifs_flags &
1139                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1140                         /* else rc is still EEXIST so will fall through to
1141                            unlink the target and retry rename */
1142                         if (rc == 0) {
1143                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1144                                                 info_buf_target,
1145                                                 cifs_sb_target->local_nls,
1146                                                 /* remap based on source sb */
1147                                                 cifs_sb_source->mnt_cifs_flags &
1148                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1149                         }
1150                         if ((rc == 0) &&
1151                             (info_buf_source->UniqueId ==
1152                              info_buf_target->UniqueId)) {
1153                         /* do not rename since the files are hardlinked which
1154                            is a noop */
1155                         } else {
1156                         /* we either can not tell the files are hardlinked
1157                            (as with Windows servers) or files are not
1158                            hardlinked so delete the target manually before
1159                            renaming to follow POSIX rather than Windows
1160                            semantics */
1161                                 cifs_unlink(target_inode, target_direntry);
1162                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1163                                                    toName,
1164                                                    cifs_sb_source->local_nls,
1165                                                    cifs_sb_source->mnt_cifs_flags
1166                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1167                         }
1168                         kfree(info_buf_source);
1169                 } /* if we can not get memory just leave rc as EEXIST */
1170         }
1171
1172         if (rc) {
1173                 cFYI(1, ("rename rc %d", rc));
1174         }
1175
1176         if ((rc == -EIO) || (rc == -EEXIST)) {
1177                 int oplock = FALSE;
1178                 __u16 netfid;
1179
1180                 /* BB FIXME Is Generic Read correct for rename? */
1181                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1182                    need to test renaming open directory, also GENERIC_READ
1183                    might not right be right access to request */
1184                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1185                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1186                                  cifs_sb_source->local_nls,
1187                                  cifs_sb_source->mnt_cifs_flags &
1188                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1189                 if (rc == 0) {
1190                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1191                                               cifs_sb_source->local_nls,
1192                                               cifs_sb_source->mnt_cifs_flags &
1193                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1194                         CIFSSMBClose(xid, pTcon, netfid);
1195                 }
1196         }
1197
1198 cifs_rename_exit:
1199         kfree(fromName);
1200         kfree(toName);
1201         FreeXid(xid);
1202         return rc;
1203 }
1204
1205 int cifs_revalidate(struct dentry *direntry)
1206 {
1207         int xid;
1208         int rc = 0;
1209         char *full_path;
1210         struct cifs_sb_info *cifs_sb;
1211         struct cifsInodeInfo *cifsInode;
1212         loff_t local_size;
1213         struct timespec local_mtime;
1214         int invalidate_inode = FALSE;
1215
1216         if (direntry->d_inode == NULL)
1217                 return -ENOENT;
1218
1219         cifsInode = CIFS_I(direntry->d_inode);
1220
1221         if (cifsInode == NULL)
1222                 return -ENOENT;
1223
1224         /* no sense revalidating inode info on file that no one can write */
1225         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1226                 return rc;
1227
1228         xid = GetXid();
1229
1230         cifs_sb = CIFS_SB(direntry->d_sb);
1231
1232         /* can not safely grab the rename sem here if rename calls revalidate
1233            since that would deadlock */
1234         full_path = build_path_from_dentry(direntry);
1235         if (full_path == NULL) {
1236                 FreeXid(xid);
1237                 return -ENOMEM;
1238         }
1239         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1240                  "jiffies %ld", full_path, direntry->d_inode,
1241                  direntry->d_inode->i_count.counter, direntry,
1242                  direntry->d_time, jiffies));
1243
1244         if (cifsInode->time == 0) {
1245                 /* was set to zero previously to force revalidate */
1246         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1247                    lookupCacheEnabled) {
1248                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1249                     (direntry->d_inode->i_nlink == 1)) {
1250                         kfree(full_path);
1251                         FreeXid(xid);
1252                         return rc;
1253                 } else {
1254                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1255                 }
1256         }
1257
1258         /* save mtime and size */
1259         local_mtime = direntry->d_inode->i_mtime;
1260         local_size = direntry->d_inode->i_size;
1261
1262         if (cifs_sb->tcon->unix_ext) {
1263                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1264                                               direntry->d_sb, xid);
1265                 if (rc) {
1266                         cFYI(1, ("error on getting revalidate info %d", rc));
1267 /*                      if (rc != -ENOENT)
1268                                 rc = 0; */      /* BB should we cache info on
1269                                                    certain errors? */
1270                 }
1271         } else {
1272                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1273                                          direntry->d_sb, xid);
1274                 if (rc) {
1275                         cFYI(1, ("error on getting revalidate info %d", rc));
1276 /*                      if (rc != -ENOENT)
1277                                 rc = 0; */      /* BB should we cache info on
1278                                                    certain errors? */
1279                 }
1280         }
1281         /* should we remap certain errors, access denied?, to zero */
1282
1283         /* if not oplocked, we invalidate inode pages if mtime or file size
1284            had changed on server */
1285
1286         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1287             (local_size == direntry->d_inode->i_size)) {
1288                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1289         } else {
1290                 /* file may have changed on server */
1291                 if (cifsInode->clientCanCacheRead) {
1292                         /* no need to invalidate inode pages since we were the
1293                            only ones who could have modified the file and the
1294                            server copy is staler than ours */
1295                 } else {
1296                         invalidate_inode = TRUE;
1297                 }
1298         }
1299
1300         /* can not grab this sem since kernel filesys locking documentation
1301            indicates i_mutex may be taken by the kernel on lookup and rename
1302            which could deadlock if we grab the i_mutex here as well */
1303 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1304         /* need to write out dirty pages here  */
1305         if (direntry->d_inode->i_mapping) {
1306                 /* do we need to lock inode until after invalidate completes
1307                    below? */
1308                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1309         }
1310         if (invalidate_inode) {
1311         /* shrink_dcache not necessary now that cifs dentry ops
1312         are exported for negative dentries */
1313 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1314                         shrink_dcache_parent(direntry); */
1315                 if (S_ISREG(direntry->d_inode->i_mode)) {
1316                         if (direntry->d_inode->i_mapping)
1317                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1318                         /* may eventually have to do this for open files too */
1319                         if (list_empty(&(cifsInode->openFileList))) {
1320                                 /* changed on server - flush read ahead pages */
1321                                 cFYI(1, ("Invalidating read ahead data on "
1322                                          "closed file"));
1323                                 invalidate_remote_inode(direntry->d_inode);
1324                         }
1325                 }
1326         }
1327 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1328
1329         kfree(full_path);
1330         FreeXid(xid);
1331         return rc;
1332 }
1333
1334 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1335         struct kstat *stat)
1336 {
1337         int err = cifs_revalidate(dentry);
1338         if (!err) {
1339                 generic_fillattr(dentry->d_inode, stat);
1340                 stat->blksize = CIFS_MAX_MSGSIZE;
1341         }
1342         return err;
1343 }
1344
1345 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1346 {
1347         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1348         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1349         struct page *page;
1350         int rc = 0;
1351
1352         page = grab_cache_page(mapping, index);
1353         if (!page)
1354                 return -ENOMEM;
1355
1356         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1357         unlock_page(page);
1358         page_cache_release(page);
1359         return rc;
1360 }
1361
1362 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1363 {
1364         struct address_space *mapping = inode->i_mapping;
1365         unsigned long limit;
1366
1367         spin_lock(&inode->i_lock);
1368         if (inode->i_size < offset)
1369                 goto do_expand;
1370         /*
1371          * truncation of in-use swapfiles is disallowed - it would cause
1372          * subsequent swapout to scribble on the now-freed blocks.
1373          */
1374         if (IS_SWAPFILE(inode)) {
1375                 spin_unlock(&inode->i_lock);
1376                 goto out_busy;
1377         }
1378         i_size_write(inode, offset);
1379         spin_unlock(&inode->i_lock);
1380         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1381         truncate_inode_pages(mapping, offset);
1382         goto out_truncate;
1383
1384 do_expand:
1385         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1386         if (limit != RLIM_INFINITY && offset > limit) {
1387                 spin_unlock(&inode->i_lock);
1388                 goto out_sig;
1389         }
1390         if (offset > inode->i_sb->s_maxbytes) {
1391                 spin_unlock(&inode->i_lock);
1392                 goto out_big;
1393         }
1394         i_size_write(inode, offset);
1395         spin_unlock(&inode->i_lock);
1396 out_truncate:
1397         if (inode->i_op && inode->i_op->truncate)
1398                 inode->i_op->truncate(inode);
1399         return 0;
1400 out_sig:
1401         send_sig(SIGXFSZ, current, 0);
1402 out_big:
1403         return -EFBIG;
1404 out_busy:
1405         return -ETXTBSY;
1406 }
1407
1408 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1409 {
1410         int xid;
1411         struct cifs_sb_info *cifs_sb;
1412         struct cifsTconInfo *pTcon;
1413         char *full_path = NULL;
1414         int rc = -EACCES;
1415         struct cifsFileInfo *open_file = NULL;
1416         FILE_BASIC_INFO time_buf;
1417         int set_time = FALSE;
1418         int set_dosattr = FALSE;
1419         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1420         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1421         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1422         struct cifsInodeInfo *cifsInode;
1423
1424         xid = GetXid();
1425
1426         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1427                  direntry->d_name.name, attrs->ia_valid));
1428
1429         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1430         pTcon = cifs_sb->tcon;
1431
1432         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1433                 /* check if we have permission to change attrs */
1434                 rc = inode_change_ok(direntry->d_inode, attrs);
1435                 if (rc < 0) {
1436                         FreeXid(xid);
1437                         return rc;
1438                 } else
1439                         rc = 0;
1440         }
1441
1442         full_path = build_path_from_dentry(direntry);
1443         if (full_path == NULL) {
1444                 FreeXid(xid);
1445                 return -ENOMEM;
1446         }
1447         cifsInode = CIFS_I(direntry->d_inode);
1448
1449         /* BB check if we need to refresh inode from server now ? BB */
1450
1451         /* need to flush data before changing file size on server */
1452         filemap_write_and_wait(direntry->d_inode->i_mapping);
1453
1454         if (attrs->ia_valid & ATTR_SIZE) {
1455                 /* To avoid spurious oplock breaks from server, in the case of
1456                    inodes that we already have open, avoid doing path based
1457                    setting of file size if we can do it by handle.
1458                    This keeps our caching token (oplock) and avoids timeouts
1459                    when the local oplock break takes longer to flush
1460                    writebehind data than the SMB timeout for the SetPathInfo
1461                    request would allow */
1462
1463                 open_file = find_writable_file(cifsInode);
1464                 if (open_file) {
1465                         __u16 nfid = open_file->netfid;
1466                         __u32 npid = open_file->pid;
1467                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1468                                                 nfid, npid, FALSE);
1469                         atomic_dec(&open_file->wrtPending);
1470                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1471                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1472                                 int bytes_written;
1473                                 rc = CIFSSMBWrite(xid, pTcon,
1474                                                   nfid, 0, attrs->ia_size,
1475                                                   &bytes_written, NULL, NULL,
1476                                                   1 /* 45 seconds */);
1477                                 cFYI(1, ("Wrt seteof rc %d", rc));
1478                         }
1479                 } else
1480                         rc = -EINVAL;
1481
1482                 if (rc != 0) {
1483                         /* Set file size by pathname rather than by handle
1484                            either because no valid, writeable file handle for
1485                            it was found or because there was an error setting
1486                            it by handle */
1487                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1488                                            attrs->ia_size, FALSE,
1489                                            cifs_sb->local_nls,
1490                                            cifs_sb->mnt_cifs_flags &
1491                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1492                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1493                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1494                                 __u16 netfid;
1495                                 int oplock = FALSE;
1496
1497                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1498                                         FILE_OPEN,
1499                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1500                                         CREATE_NOT_DIR, &netfid, &oplock,
1501                                         NULL, cifs_sb->local_nls,
1502                                         cifs_sb->mnt_cifs_flags &
1503                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1504                                 if (rc == 0) {
1505                                         int bytes_written;
1506                                         rc = CIFSSMBWrite(xid, pTcon,
1507                                                         netfid, 0,
1508                                                         attrs->ia_size,
1509                                                         &bytes_written, NULL,
1510                                                         NULL, 1 /* 45 sec */);
1511                                         cFYI(1, ("wrt seteof rc %d", rc));
1512                                         CIFSSMBClose(xid, pTcon, netfid);
1513                                 }
1514
1515                         }
1516                 }
1517
1518                 /* Server is ok setting allocation size implicitly - no need
1519                    to call:
1520                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1521                          cifs_sb->local_nls);
1522                    */
1523
1524                 if (rc == 0) {
1525                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1526                         cifs_truncate_page(direntry->d_inode->i_mapping,
1527                                            direntry->d_inode->i_size);
1528                 } else
1529                         goto cifs_setattr_exit;
1530         }
1531         if (attrs->ia_valid & ATTR_UID) {
1532                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1533                 uid = attrs->ia_uid;
1534         }
1535         if (attrs->ia_valid & ATTR_GID) {
1536                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1537                 gid = attrs->ia_gid;
1538         }
1539
1540         time_buf.Attributes = 0;
1541         if (attrs->ia_valid & ATTR_MODE) {
1542                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1543                 mode = attrs->ia_mode;
1544         }
1545
1546         if ((pTcon->unix_ext)
1547             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1548                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1549                                          0 /* dev_t */, cifs_sb->local_nls,
1550                                          cifs_sb->mnt_cifs_flags &
1551                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1552         else if (attrs->ia_valid & ATTR_MODE) {
1553                 rc = 0;
1554                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1555                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1556                                 set_dosattr = TRUE;
1557                                 time_buf.Attributes =
1558                                         cpu_to_le32(cifsInode->cifsAttrs |
1559                                                     ATTR_READONLY);
1560                         }
1561                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1562                         /* If file is readonly on server, we would
1563                         not be able to write to it - so if any write
1564                         bit is enabled for user or group or other we
1565                         need to at least try to remove r/o dos attr */
1566                         set_dosattr = TRUE;
1567                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1568                                             (~ATTR_READONLY));
1569                         /* Windows ignores set to zero */
1570                         if (time_buf.Attributes == 0)
1571                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1572                 }
1573                 /* BB to be implemented -
1574                    via Windows security descriptors or streams */
1575                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1576                                       cifs_sb->local_nls); */
1577         }
1578
1579         if (attrs->ia_valid & ATTR_ATIME) {
1580                 set_time = TRUE;
1581                 time_buf.LastAccessTime =
1582                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1583         } else
1584                 time_buf.LastAccessTime = 0;
1585
1586         if (attrs->ia_valid & ATTR_MTIME) {
1587                 set_time = TRUE;
1588                 time_buf.LastWriteTime =
1589                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1590         } else
1591                 time_buf.LastWriteTime = 0;
1592         /* Do not set ctime explicitly unless other time
1593            stamps are changed explicitly (i.e. by utime()
1594            since we would then have a mix of client and
1595            server times */
1596
1597         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1598                 set_time = TRUE;
1599                 /* Although Samba throws this field away
1600                 it may be useful to Windows - but we do
1601                 not want to set ctime unless some other
1602                 timestamp is changing */
1603                 cFYI(1, ("CIFS - CTIME changed"));
1604                 time_buf.ChangeTime =
1605                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1606         } else
1607                 time_buf.ChangeTime = 0;
1608
1609         if (set_time || set_dosattr) {
1610                 time_buf.CreationTime = 0;      /* do not change */
1611                 /* In the future we should experiment - try setting timestamps
1612                    via Handle (SetFileInfo) instead of by path */
1613                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1614                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1615                                              cifs_sb->local_nls,
1616                                              cifs_sb->mnt_cifs_flags &
1617                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1618                 else
1619                         rc = -EOPNOTSUPP;
1620
1621                 if (rc == -EOPNOTSUPP) {
1622                         int oplock = FALSE;
1623                         __u16 netfid;
1624
1625                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1626                                  "times not supported by this server"));
1627                         /* BB we could scan to see if we already have it open
1628                            and pass in pid of opener to function */
1629                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1630                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1631                                          CREATE_NOT_DIR, &netfid, &oplock,
1632                                          NULL, cifs_sb->local_nls,
1633                                          cifs_sb->mnt_cifs_flags &
1634                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1635                         if (rc == 0) {
1636                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1637                                                          netfid);
1638                                 CIFSSMBClose(xid, pTcon, netfid);
1639                         } else {
1640                         /* BB For even older servers we could convert time_buf
1641                            into old DOS style which uses two second
1642                            granularity */
1643
1644                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1645                                         &time_buf, cifs_sb->local_nls); */
1646                         }
1647                 }
1648                 /* Even if error on time set, no sense failing the call if
1649                 the server would set the time to a reasonable value anyway,
1650                 and this check ensures that we are not being called from
1651                 sys_utimes in which case we ought to fail the call back to
1652                 the user when the server rejects the call */
1653                 if ((rc) && (attrs->ia_valid &
1654                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1655                         rc = 0;
1656         }
1657
1658         /* do not need local check to inode_check_ok since the server does
1659            that */
1660         if (!rc)
1661                 rc = inode_setattr(direntry->d_inode, attrs);
1662 cifs_setattr_exit:
1663         kfree(full_path);
1664         FreeXid(xid);
1665         return rc;
1666 }
1667
1668 #if 0
1669 void cifs_delete_inode(struct inode *inode)
1670 {
1671         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1672         /* may have to add back in if and when safe distributed caching of
1673            directories added e.g. via FindNotify */
1674 }
1675 #endif