fs/cifs/inode.c

   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         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
 587                 cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 588         else
 589                 cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 590         /* can not call macro FreeXid here since in a void func */
 591         _FreeXid(xid);
 592 }
 593
 594 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 595 {
 596         int rc = 0;
 597         int xid;
 598         struct cifs_sb_info *cifs_sb;
 599         struct cifsTconInfo *pTcon;
 600         char *full_path = NULL;
 601         struct cifsInodeInfo *cifsInode;
 602         FILE_BASIC_INFO *pinfo_buf;
 603
 604         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 605
 606         xid = GetXid();
 607
 608         if (inode)
 609                 cifs_sb = CIFS_SB(inode->i_sb);
 610         else
 611                 cifs_sb = CIFS_SB(direntry->d_sb);
 612         pTcon = cifs_sb->tcon;
 613
 614         /* Unlink can be called from rename so we can not grab the sem here
 615            since we deadlock otherwise */
 616 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 617         full_path = build_path_from_dentry(direntry);
 618 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 619         if (full_path == NULL) {
 620                 FreeXid(xid);
 621                 return -ENOMEM;
 622         }
 623         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 624                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 625
 626         if (!rc) {
 627                 if (direntry->d_inode)
 628                         drop_nlink(direntry->d_inode);
 629         } else if (rc == -ENOENT) {
 630                 d_drop(direntry);
 631         } else if (rc == -ETXTBSY) {
 632                 int oplock = FALSE;
 633                 __u16 netfid;
 634
 635                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 636                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 637                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 638                                  cifs_sb->mnt_cifs_flags &
 639                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 640                 if (rc == 0) {
 641                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 642                                               cifs_sb->local_nls,
 643                                               cifs_sb->mnt_cifs_flags &
 644                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 645                         CIFSSMBClose(xid, pTcon, netfid);
 646                         if (direntry->d_inode)
 647                                 drop_nlink(direntry->d_inode);
 648                 }
 649         } else if (rc == -EACCES) {
 650                 /* try only if r/o attribute set in local lookup data? */
 651                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 652                 if (pinfo_buf) {
 653                         /* ATTRS set to normal clears r/o bit */
 654                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 655                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 656                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 657                                                      pinfo_buf,
 658                                                      cifs_sb->local_nls,
 659                                                      cifs_sb->mnt_cifs_flags &
 660                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 661                         else
 662                                 rc = -EOPNOTSUPP;
 663
 664                         if (rc == -EOPNOTSUPP) {
 665                                 int oplock = FALSE;
 666                                 __u16 netfid;
 667                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 668                                                           full_path,
 669                                                           (__u16)ATTR_NORMAL,
 670                                                           cifs_sb->local_nls);
 671                            For some strange reason it seems that NT4 eats the
 672                            old setattr call without actually setting the
 673                            attributes so on to the third attempted workaround
 674                            */
 675
 676                         /* BB could scan to see if we already have it open
 677                            and pass in pid of opener to function */
 678                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 679                                                  FILE_OPEN, SYNCHRONIZE |
 680                                                  FILE_WRITE_ATTRIBUTES, 0,
 681                                                  &netfid, &oplock, NULL,
 682                                                  cifs_sb->local_nls,
 683                                                  cifs_sb->mnt_cifs_flags &
 684                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 685                                 if (rc == 0) {
 686                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 687                                                                  pinfo_buf,
 688                                                                  netfid);
 689                                         CIFSSMBClose(xid, pTcon, netfid);
 690                                 }
 691                         }
 692                         kfree(pinfo_buf);
 693                 }
 694                 if (rc == 0) {
 695                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 696                                             cifs_sb->local_nls,
 697                                             cifs_sb->mnt_cifs_flags &
 698                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 699                         if (!rc) {
 700                                 if (direntry->d_inode)
 701                                         drop_nlink(direntry->d_inode);
 702                         } else if (rc == -ETXTBSY) {
 703                                 int oplock = FALSE;
 704                                 __u16 netfid;
 705
 706                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 707                                                  FILE_OPEN, DELETE,
 708                                                  CREATE_NOT_DIR |
 709                                                  CREATE_DELETE_ON_CLOSE,
 710                                                  &netfid, &oplock, NULL,
 711                                                  cifs_sb->local_nls,
 712                                                  cifs_sb->mnt_cifs_flags &
 713                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 714                                 if (rc == 0) {
 715                                         CIFSSMBRenameOpenFile(xid, pTcon,
 716                                                 netfid, NULL,
 717                                                 cifs_sb->local_nls,
 718                                                 cifs_sb->mnt_cifs_flags &
 719                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 720                                         CIFSSMBClose(xid, pTcon, netfid);
 721                                         if (direntry->d_inode)
 722                                                 drop_nlink(direntry->d_inode);
 723                                 }
 724                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 725                         }
 726                 }
 727         }
 728         if (direntry->d_inode) {
 729                 cifsInode = CIFS_I(direntry->d_inode);
 730                 cifsInode->time = 0;    /* will force revalidate to get info
 731                                            when needed */
 732                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 733         }
 734         if (inode) {
 735                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 736                 cifsInode = CIFS_I(inode);
 737                 cifsInode->time = 0;    /* force revalidate of dir as well */
 738         }
 739
 740         kfree(full_path);
 741         FreeXid(xid);
 742         return rc;
 743 }
 744
 745 static void posix_fill_in_inode(struct inode *tmp_inode,
 746         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 747 {
 748         loff_t local_size;
 749         struct timespec local_mtime;
 750
 751         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 752         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 753
 754         __u32 type = le32_to_cpu(pData->Type);
 755         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 756         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 757         cifsInfo->time = jiffies;
 758         atomic_inc(&cifsInfo->inUse);
 759
 760         /* save mtime and size */
 761         local_mtime = tmp_inode->i_mtime;
 762         local_size  = tmp_inode->i_size;
 763
 764         tmp_inode->i_atime =
 765             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 766         tmp_inode->i_mtime =
 767             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 768         tmp_inode->i_ctime =
 769             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 770
 771         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 772         /* since we set the inode type below we need to mask off type
 773            to avoid strange results if bits above were corrupt */
 774         tmp_inode->i_mode &= ~S_IFMT;
 775         if (type == UNIX_FILE) {
 776                 *pobject_type = DT_REG;
 777                 tmp_inode->i_mode |= S_IFREG;
 778         } else if (type == UNIX_SYMLINK) {
 779                 *pobject_type = DT_LNK;
 780                 tmp_inode->i_mode |= S_IFLNK;
 781         } else if (type == UNIX_DIR) {
 782                 *pobject_type = DT_DIR;
 783                 tmp_inode->i_mode |= S_IFDIR;
 784         } else if (type == UNIX_CHARDEV) {
 785                 *pobject_type = DT_CHR;
 786                 tmp_inode->i_mode |= S_IFCHR;
 787                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 788                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 789         } else if (type == UNIX_BLOCKDEV) {
 790                 *pobject_type = DT_BLK;
 791                 tmp_inode->i_mode |= S_IFBLK;
 792                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 793                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 794         } else if (type == UNIX_FIFO) {
 795                 *pobject_type = DT_FIFO;
 796                 tmp_inode->i_mode |= S_IFIFO;
 797         } else if (type == UNIX_SOCKET) {
 798                 *pobject_type = DT_SOCK;
 799                 tmp_inode->i_mode |= S_IFSOCK;
 800         } else {
 801                 /* safest to just call it a file */
 802                 *pobject_type = DT_REG;
 803                 tmp_inode->i_mode |= S_IFREG;
 804                 cFYI(1, ("unknown inode type %d", type));
 805         }
 806
 807 #ifdef CONFIG_CIFS_DEBUG2
 808         cFYI(1, ("object type: %d", type));
 809 #endif
 810         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 811         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 812         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 813
 814         spin_lock(&tmp_inode->i_lock);
 815         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 816                 /* can not safely change the file size here if the
 817                 client is writing to it due to potential races */
 818                 i_size_write(tmp_inode, end_of_file);
 819
 820         /* 512 bytes (2**9) is the fake blocksize that must be used */
 821         /* for this calculation, not the real blocksize */
 822                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 823         }
 824         spin_unlock(&tmp_inode->i_lock);
 825
 826         if (S_ISREG(tmp_inode->i_mode)) {
 827                 cFYI(1, ("File inode"));
 828                 tmp_inode->i_op = &cifs_file_inode_ops;
 829
 830                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 831                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 832                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 833                         else
 834                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 835
 836                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 837                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 838                 else
 839                         tmp_inode->i_fop = &cifs_file_ops;
 840
 841                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 842                    (cifs_sb->tcon->ses->server->maxBuf <
 843                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 844                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 845                 else
 846                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 847
 848                 if (isNewInode)
 849                         return; /* No sense invalidating pages for new inode
 850                                    since we we have not started caching
 851                                    readahead file data yet */
 852
 853                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 854                         (local_size == tmp_inode->i_size)) {
 855                         cFYI(1, ("inode exists but unchanged"));
 856                 } else {
 857                         /* file may have changed on server */
 858                         cFYI(1, ("invalidate inode, readdir detected change"));
 859                         invalidate_remote_inode(tmp_inode);
 860                 }
 861         } else if (S_ISDIR(tmp_inode->i_mode)) {
 862                 cFYI(1, ("Directory inode"));
 863                 tmp_inode->i_op = &cifs_dir_inode_ops;
 864                 tmp_inode->i_fop = &cifs_dir_ops;
 865         } else if (S_ISLNK(tmp_inode->i_mode)) {
 866                 cFYI(1, ("Symbolic Link inode"));
 867                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 868 /* tmp_inode->i_fop = *//* do not need to set to anything */
 869         } else {
 870                 cFYI(1, ("Special inode"));
 871                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 872                                    tmp_inode->i_rdev);
 873         }
 874 }
 875
 876 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 877 {
 878         int rc = 0;
 879         int xid;
 880         struct cifs_sb_info *cifs_sb;
 881         struct cifsTconInfo *pTcon;
 882         char *full_path = NULL;
 883         struct inode *newinode = NULL;
 884
 885         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 886
 887         xid = GetXid();
 888
 889         cifs_sb = CIFS_SB(inode->i_sb);
 890         pTcon = cifs_sb->tcon;
 891
 892         full_path = build_path_from_dentry(direntry);
 893         if (full_path == NULL) {
 894                 FreeXid(xid);
 895                 return -ENOMEM;
 896         }
 897
 898         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 899                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 900                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 901                 u32 oplock = 0;
 902                 FILE_UNIX_BASIC_INFO * pInfo =
 903                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 904                 if (pInfo == NULL) {
 905                         rc = -ENOMEM;
 906                         goto mkdir_out;
 907                 }
 908
 909                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 910                                 mode, NULL /* netfid */, pInfo, &oplock,
 911                                 full_path, cifs_sb->local_nls,
 912                                 cifs_sb->mnt_cifs_flags &
 913                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 914                 if (rc) {
 915                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 916                         d_drop(direntry);
 917                 } else {
 918                         int obj_type;
 919                         if (pInfo->Type == -1) /* no return info - go query */
 920                                 goto mkdir_get_info;
 921 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 922         to set uid/gid */
 923                         inc_nlink(inode);
 924                         if (pTcon->nocase)
 925                                 direntry->d_op = &cifs_ci_dentry_ops;
 926                         else
 927                                 direntry->d_op = &cifs_dentry_ops;
 928
 929                         newinode = new_inode(inode->i_sb);
 930                         if (newinode == NULL)
 931                                 goto mkdir_get_info;
 932                         /* Is an i_ino of zero legal? */
 933                         /* Are there sanity checks we can use to ensure that
 934                            the server is really filling in that field? */
 935                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 936                                 newinode->i_ino =
 937                                         (unsigned long)pInfo->UniqueId;
 938                         } /* note ino incremented to unique num in new_inode */
 939                         if (inode->i_sb->s_flags & MS_NOATIME)
 940                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 941                         newinode->i_nlink = 2;
 942
 943                         insert_inode_hash(newinode);
 944                         d_instantiate(direntry, newinode);
 945
 946                         /* we already checked in POSIXCreate whether
 947                            frame was long enough */
 948                         posix_fill_in_inode(direntry->d_inode,
 949                                         pInfo, &obj_type, 1 /* NewInode */);
 950 #ifdef CONFIG_CIFS_DEBUG2
 951                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 952                                 direntry, direntry->d_name.name, newinode));
 953
 954                         if (newinode->i_nlink != 2)
 955                                 cFYI(1, ("unexpected number of links %d",
 956                                         newinode->i_nlink));
 957 #endif
 958                 }
 959                 kfree(pInfo);
 960                 goto mkdir_out;
 961         }
 962
 963         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 964         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 965                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 966         if (rc) {
 967                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 968                 d_drop(direntry);
 969         } else {
 970 mkdir_get_info:
 971                 inc_nlink(inode);
 972                 if (pTcon->ses->capabilities & CAP_UNIX)
 973                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 974                                                       inode->i_sb, xid);
 975                 else
 976                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 977                                                  inode->i_sb, xid);
 978
 979                 if (pTcon->nocase)
 980                         direntry->d_op = &cifs_ci_dentry_ops;
 981                 else
 982                         direntry->d_op = &cifs_dentry_ops;
 983                 d_instantiate(direntry, newinode);
 984                  /* setting nlink not necessary except in cases where we
 985                   * failed to get it from the server or was set bogus */
 986                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
 987                                 direntry->d_inode->i_nlink = 2;
 988                 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
 989                         mode &= ~current->fs->umask;
 990                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 991                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 992                                                     mode,
 993                                                     (__u64)current->fsuid,
 994                                                     (__u64)current->fsgid,
 995                                                     0 /* dev_t */,
 996                                                     cifs_sb->local_nls,
 997                                                     cifs_sb->mnt_cifs_flags &
 998                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 999                         } else {
1000                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1001                                                     mode, (__u64)-1,
1002                                                     (__u64)-1, 0 /* dev_t */,
1003                                                     cifs_sb->local_nls,
1004                                                     cifs_sb->mnt_cifs_flags &
1005                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1006                         }
1007                 } else {
1008                         /* BB to be implemented via Windows secrty descriptors
1009                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1010                                                  -1, -1, local_nls); */
1011                         if (direntry->d_inode) {
1012                                 direntry->d_inode->i_mode = mode;
1013                                 direntry->d_inode->i_mode |= S_IFDIR;
1014                                 if (cifs_sb->mnt_cifs_flags &
1015                                      CIFS_MOUNT_SET_UID) {
1016                                         direntry->d_inode->i_uid =
1017                                                 current->fsuid;
1018                                         direntry->d_inode->i_gid =
1019                                                 current->fsgid;
1020                                 }
1021                         }
1022                 }
1023         }
1024 mkdir_out:
1025         kfree(full_path);
1026         FreeXid(xid);
1027         return rc;
1028 }
1029
1030 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1031 {
1032         int rc = 0;
1033         int xid;
1034         struct cifs_sb_info *cifs_sb;
1035         struct cifsTconInfo *pTcon;
1036         char *full_path = NULL;
1037         struct cifsInodeInfo *cifsInode;
1038
1039         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1040
1041         xid = GetXid();
1042
1043         cifs_sb = CIFS_SB(inode->i_sb);
1044         pTcon = cifs_sb->tcon;
1045
1046         full_path = build_path_from_dentry(direntry);
1047         if (full_path == NULL) {
1048                 FreeXid(xid);
1049                 return -ENOMEM;
1050         }
1051
1052         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1053                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1054
1055         if (!rc) {
1056                 drop_nlink(inode);
1057                 spin_lock(&direntry->d_inode->i_lock);
1058                 i_size_write(direntry->d_inode, 0);
1059                 clear_nlink(direntry->d_inode);
1060                 spin_unlock(&direntry->d_inode->i_lock);
1061         }
1062
1063         cifsInode = CIFS_I(direntry->d_inode);
1064         cifsInode->time = 0;    /* force revalidate to go get info when
1065                                    needed */
1066         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1067                 current_fs_time(inode->i_sb);
1068
1069         kfree(full_path);
1070         FreeXid(xid);
1071         return rc;
1072 }
1073
1074 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1075         struct inode *target_inode, struct dentry *target_direntry)
1076 {
1077         char *fromName;
1078         char *toName;
1079         struct cifs_sb_info *cifs_sb_source;
1080         struct cifs_sb_info *cifs_sb_target;
1081         struct cifsTconInfo *pTcon;
1082         int xid;
1083         int rc = 0;
1084
1085         xid = GetXid();
1086
1087         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1088         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1089         pTcon = cifs_sb_source->tcon;
1090
1091         if (pTcon != cifs_sb_target->tcon) {
1092                 FreeXid(xid);
1093                 return -EXDEV;  /* BB actually could be allowed if same server,
1094                                    but different share.
1095                                    Might eventually add support for this */
1096         }
1097
1098         /* we already  have the rename sem so we do not need to grab it again
1099            here to protect the path integrity */
1100         fromName = build_path_from_dentry(source_direntry);
1101         toName = build_path_from_dentry(target_direntry);
1102         if ((fromName == NULL) || (toName == NULL)) {
1103                 rc = -ENOMEM;
1104                 goto cifs_rename_exit;
1105         }
1106
1107         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1108                            cifs_sb_source->local_nls,
1109                            cifs_sb_source->mnt_cifs_flags &
1110                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1111         if (rc == -EEXIST) {
1112                 /* check if they are the same file because rename of hardlinked
1113                    files is a noop */
1114                 FILE_UNIX_BASIC_INFO *info_buf_source;
1115                 FILE_UNIX_BASIC_INFO *info_buf_target;
1116
1117                 info_buf_source =
1118                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1119                 if (info_buf_source != NULL) {
1120                         info_buf_target = info_buf_source + 1;
1121                         if (pTcon->ses->capabilities & CAP_UNIX)
1122                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1123                                         info_buf_source,
1124                                         cifs_sb_source->local_nls,
1125                                         cifs_sb_source->mnt_cifs_flags &
1126                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1127                         /* else rc is still EEXIST so will fall through to
1128                            unlink the target and retry rename */
1129                         if (rc == 0) {
1130                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1131                                                 info_buf_target,
1132                                                 cifs_sb_target->local_nls,
1133                                                 /* remap based on source sb */
1134                                                 cifs_sb_source->mnt_cifs_flags &
1135                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1136                         }
1137                         if ((rc == 0) &&
1138                             (info_buf_source->UniqueId ==
1139                              info_buf_target->UniqueId)) {
1140                         /* do not rename since the files are hardlinked which
1141                            is a noop */
1142                         } else {
1143                         /* we either can not tell the files are hardlinked
1144                            (as with Windows servers) or files are not
1145                            hardlinked so delete the target manually before
1146                            renaming to follow POSIX rather than Windows
1147                            semantics */
1148                                 cifs_unlink(target_inode, target_direntry);
1149                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1150                                                    toName,
1151                                                    cifs_sb_source->local_nls,
1152                                                    cifs_sb_source->mnt_cifs_flags
1153                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1154                         }
1155                         kfree(info_buf_source);
1156                 } /* if we can not get memory just leave rc as EEXIST */
1157         }
1158
1159         if (rc) {
1160                 cFYI(1, ("rename rc %d", rc));
1161         }
1162
1163         if ((rc == -EIO) || (rc == -EEXIST)) {
1164                 int oplock = FALSE;
1165                 __u16 netfid;
1166
1167                 /* BB FIXME Is Generic Read correct for rename? */
1168                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1169                    need to test renaming open directory, also GENERIC_READ
1170                    might not right be right access to request */
1171                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1172                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1173                                  cifs_sb_source->local_nls,
1174                                  cifs_sb_source->mnt_cifs_flags &
1175                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1176                 if (rc == 0) {
1177                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1178                                               cifs_sb_source->local_nls,
1179                                               cifs_sb_source->mnt_cifs_flags &
1180                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1181                         CIFSSMBClose(xid, pTcon, netfid);
1182                 }
1183         }
1184
1185 cifs_rename_exit:
1186         kfree(fromName);
1187         kfree(toName);
1188         FreeXid(xid);
1189         return rc;
1190 }
1191
1192 int cifs_revalidate(struct dentry *direntry)
1193 {
1194         int xid;
1195         int rc = 0;
1196         char *full_path;
1197         struct cifs_sb_info *cifs_sb;
1198         struct cifsInodeInfo *cifsInode;
1199         loff_t local_size;
1200         struct timespec local_mtime;
1201         int invalidate_inode = FALSE;
1202
1203         if (direntry->d_inode == NULL)
1204                 return -ENOENT;
1205
1206         cifsInode = CIFS_I(direntry->d_inode);
1207
1208         if (cifsInode == NULL)
1209                 return -ENOENT;
1210
1211         /* no sense revalidating inode info on file that no one can write */
1212         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1213                 return rc;
1214
1215         xid = GetXid();
1216
1217         cifs_sb = CIFS_SB(direntry->d_sb);
1218
1219         /* can not safely grab the rename sem here if rename calls revalidate
1220            since that would deadlock */
1221         full_path = build_path_from_dentry(direntry);
1222         if (full_path == NULL) {
1223                 FreeXid(xid);
1224                 return -ENOMEM;
1225         }
1226         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1227                  "jiffies %ld", full_path, direntry->d_inode,
1228                  direntry->d_inode->i_count.counter, direntry,
1229                  direntry->d_time, jiffies));
1230
1231         if (cifsInode->time == 0) {
1232                 /* was set to zero previously to force revalidate */
1233         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1234                    lookupCacheEnabled) {
1235                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1236                     (direntry->d_inode->i_nlink == 1)) {
1237                         kfree(full_path);
1238                         FreeXid(xid);
1239                         return rc;
1240                 } else {
1241                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1242                 }
1243         }
1244
1245         /* save mtime and size */
1246         local_mtime = direntry->d_inode->i_mtime;
1247         local_size = direntry->d_inode->i_size;
1248
1249         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1250                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1251                                               direntry->d_sb, xid);
1252                 if (rc) {
1253                         cFYI(1, ("error on getting revalidate info %d", rc));
1254 /*                      if (rc != -ENOENT)
1255                                 rc = 0; */      /* BB should we cache info on
1256                                                    certain errors? */
1257                 }
1258         } else {
1259                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
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         }
1268         /* should we remap certain errors, access denied?, to zero */
1269
1270         /* if not oplocked, we invalidate inode pages if mtime or file size
1271            had changed on server */
1272
1273         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1274             (local_size == direntry->d_inode->i_size)) {
1275                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1276         } else {
1277                 /* file may have changed on server */
1278                 if (cifsInode->clientCanCacheRead) {
1279                         /* no need to invalidate inode pages since we were the
1280                            only ones who could have modified the file and the
1281                            server copy is staler than ours */
1282                 } else {
1283                         invalidate_inode = TRUE;
1284                 }
1285         }
1286
1287         /* can not grab this sem since kernel filesys locking documentation
1288            indicates i_mutex may be taken by the kernel on lookup and rename
1289            which could deadlock if we grab the i_mutex here as well */
1290 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1291         /* need to write out dirty pages here  */
1292         if (direntry->d_inode->i_mapping) {
1293                 /* do we need to lock inode until after invalidate completes
1294                    below? */
1295                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1296         }
1297         if (invalidate_inode) {
1298         /* shrink_dcache not necessary now that cifs dentry ops
1299         are exported for negative dentries */
1300 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1301                         shrink_dcache_parent(direntry); */
1302                 if (S_ISREG(direntry->d_inode->i_mode)) {
1303                         if (direntry->d_inode->i_mapping)
1304                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1305                         /* may eventually have to do this for open files too */
1306                         if (list_empty(&(cifsInode->openFileList))) {
1307                                 /* changed on server - flush read ahead pages */
1308                                 cFYI(1, ("Invalidating read ahead data on "
1309                                          "closed file"));
1310                                 invalidate_remote_inode(direntry->d_inode);
1311                         }
1312                 }
1313         }
1314 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1315
1316         kfree(full_path);
1317         FreeXid(xid);
1318         return rc;
1319 }
1320
1321 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1322         struct kstat *stat)
1323 {
1324         int err = cifs_revalidate(dentry);
1325         if (!err) {
1326                 generic_fillattr(dentry->d_inode, stat);
1327                 stat->blksize = CIFS_MAX_MSGSIZE;
1328         }
1329         return err;
1330 }
1331
1332 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1333 {
1334         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1335         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1336         struct page *page;
1337         char *kaddr;
1338         int rc = 0;
1339
1340         page = grab_cache_page(mapping, index);
1341         if (!page)
1342                 return -ENOMEM;
1343
1344         kaddr = kmap_atomic(page, KM_USER0);
1345         memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1346         flush_dcache_page(page);
1347         kunmap_atomic(kaddr, KM_USER0);
1348         unlock_page(page);
1349         page_cache_release(page);
1350         return rc;
1351 }
1352
1353 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1354 {
1355         struct address_space *mapping = inode->i_mapping;
1356         unsigned long limit;
1357
1358         spin_lock(&inode->i_lock);
1359         if (inode->i_size < offset)
1360                 goto do_expand;
1361         /*
1362          * truncation of in-use swapfiles is disallowed - it would cause
1363          * subsequent swapout to scribble on the now-freed blocks.
1364          */
1365         if (IS_SWAPFILE(inode)) {
1366                 spin_unlock(&inode->i_lock);
1367                 goto out_busy;
1368         }
1369         i_size_write(inode, offset);
1370         spin_unlock(&inode->i_lock);
1371         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1372         truncate_inode_pages(mapping, offset);
1373         goto out_truncate;
1374
1375 do_expand:
1376         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1377         if (limit != RLIM_INFINITY && offset > limit) {
1378                 spin_unlock(&inode->i_lock);
1379                 goto out_sig;
1380         }
1381         if (offset > inode->i_sb->s_maxbytes) {
1382                 spin_unlock(&inode->i_lock);
1383                 goto out_big;
1384         }
1385         i_size_write(inode, offset);
1386         spin_unlock(&inode->i_lock);
1387 out_truncate:
1388         if (inode->i_op && inode->i_op->truncate)
1389                 inode->i_op->truncate(inode);
1390         return 0;
1391 out_sig:
1392         send_sig(SIGXFSZ, current, 0);
1393 out_big:
1394         return -EFBIG;
1395 out_busy:
1396         return -ETXTBSY;
1397 }
1398
1399 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1400 {
1401         int xid;
1402         struct cifs_sb_info *cifs_sb;
1403         struct cifsTconInfo *pTcon;
1404         char *full_path = NULL;
1405         int rc = -EACCES;
1406         struct cifsFileInfo *open_file = NULL;
1407         FILE_BASIC_INFO time_buf;
1408         int set_time = FALSE;
1409         int set_dosattr = FALSE;
1410         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1411         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1412         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1413         struct cifsInodeInfo *cifsInode;
1414
1415         xid = GetXid();
1416
1417         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1418                  direntry->d_name.name, attrs->ia_valid));
1419
1420         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1421         pTcon = cifs_sb->tcon;
1422
1423         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1424                 /* check if we have permission to change attrs */
1425                 rc = inode_change_ok(direntry->d_inode, attrs);
1426                 if (rc < 0) {
1427                         FreeXid(xid);
1428                         return rc;
1429                 } else
1430                         rc = 0;
1431         }
1432
1433         full_path = build_path_from_dentry(direntry);
1434         if (full_path == NULL) {
1435                 FreeXid(xid);
1436                 return -ENOMEM;
1437         }
1438         cifsInode = CIFS_I(direntry->d_inode);
1439
1440         /* BB check if we need to refresh inode from server now ? BB */
1441
1442         /* need to flush data before changing file size on server */
1443         filemap_write_and_wait(direntry->d_inode->i_mapping);
1444
1445         if (attrs->ia_valid & ATTR_SIZE) {
1446                 /* To avoid spurious oplock breaks from server, in the case of
1447                    inodes that we already have open, avoid doing path based
1448                    setting of file size if we can do it by handle.
1449                    This keeps our caching token (oplock) and avoids timeouts
1450                    when the local oplock break takes longer to flush
1451                    writebehind data than the SMB timeout for the SetPathInfo
1452                    request would allow */
1453
1454                 open_file = find_writable_file(cifsInode);
1455                 if (open_file) {
1456                         __u16 nfid = open_file->netfid;
1457                         __u32 npid = open_file->pid;
1458                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1459                                                 nfid, npid, FALSE);
1460                         atomic_dec(&open_file->wrtPending);
1461                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1462                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1463                                 int bytes_written;
1464                                 rc = CIFSSMBWrite(xid, pTcon,
1465                                                   nfid, 0, attrs->ia_size,
1466                                                   &bytes_written, NULL, NULL,
1467                                                   1 /* 45 seconds */);
1468                                 cFYI(1, ("Wrt seteof rc %d", rc));
1469                         }
1470                 } else
1471                         rc = -EINVAL;
1472
1473                 if (rc != 0) {
1474                         /* Set file size by pathname rather than by handle
1475                            either because no valid, writeable file handle for
1476                            it was found or because there was an error setting
1477                            it by handle */
1478                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1479                                            attrs->ia_size, FALSE,
1480                                            cifs_sb->local_nls,
1481                                            cifs_sb->mnt_cifs_flags &
1482                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1483                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1484                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1485                                 __u16 netfid;
1486                                 int oplock = FALSE;
1487
1488                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1489                                         FILE_OPEN,
1490                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1491                                         CREATE_NOT_DIR, &netfid, &oplock,
1492                                         NULL, cifs_sb->local_nls,
1493                                         cifs_sb->mnt_cifs_flags &
1494                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1495                                 if (rc == 0) {
1496                                         int bytes_written;
1497                                         rc = CIFSSMBWrite(xid, pTcon,
1498                                                         netfid, 0,
1499                                                         attrs->ia_size,
1500                                                         &bytes_written, NULL,
1501                                                         NULL, 1 /* 45 sec */);
1502                                         cFYI(1, ("wrt seteof rc %d", rc));
1503                                         CIFSSMBClose(xid, pTcon, netfid);
1504                                 }
1505
1506                         }
1507                 }
1508
1509                 /* Server is ok setting allocation size implicitly - no need
1510                    to call:
1511                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1512                          cifs_sb->local_nls);
1513                    */
1514
1515                 if (rc == 0) {
1516                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1517                         cifs_truncate_page(direntry->d_inode->i_mapping,
1518                                            direntry->d_inode->i_size);
1519                 } else
1520                         goto cifs_setattr_exit;
1521         }
1522         if (attrs->ia_valid & ATTR_UID) {
1523                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1524                 uid = attrs->ia_uid;
1525         }
1526         if (attrs->ia_valid & ATTR_GID) {
1527                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1528                 gid = attrs->ia_gid;
1529         }
1530
1531         time_buf.Attributes = 0;
1532         if (attrs->ia_valid & ATTR_MODE) {
1533                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1534                 mode = attrs->ia_mode;
1535         }
1536
1537         if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1538             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1539                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1540                                          0 /* dev_t */, cifs_sb->local_nls,
1541                                          cifs_sb->mnt_cifs_flags &
1542                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1543         else if (attrs->ia_valid & ATTR_MODE) {
1544                 rc = 0;
1545                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1546                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1547                                 set_dosattr = TRUE;
1548                                 time_buf.Attributes =
1549                                         cpu_to_le32(cifsInode->cifsAttrs |
1550                                                     ATTR_READONLY);
1551                         }
1552                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1553                         /* If file is readonly on server, we would
1554                         not be able to write to it - so if any write
1555                         bit is enabled for user or group or other we
1556                         need to at least try to remove r/o dos attr */
1557                         set_dosattr = TRUE;
1558                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1559                                             (~ATTR_READONLY));
1560                         /* Windows ignores set to zero */
1561                         if (time_buf.Attributes == 0)
1562                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1563                 }
1564                 /* BB to be implemented -
1565                    via Windows security descriptors or streams */
1566                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1567                                       cifs_sb->local_nls); */
1568         }
1569
1570         if (attrs->ia_valid & ATTR_ATIME) {
1571                 set_time = TRUE;
1572                 time_buf.LastAccessTime =
1573                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1574         } else
1575                 time_buf.LastAccessTime = 0;
1576
1577         if (attrs->ia_valid & ATTR_MTIME) {
1578                 set_time = TRUE;
1579                 time_buf.LastWriteTime =
1580                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1581         } else
1582                 time_buf.LastWriteTime = 0;
1583         /* Do not set ctime explicitly unless other time
1584            stamps are changed explicitly (i.e. by utime()
1585            since we would then have a mix of client and
1586            server times */
1587
1588         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1589                 set_time = TRUE;
1590                 /* Although Samba throws this field away
1591                 it may be useful to Windows - but we do
1592                 not want to set ctime unless some other
1593                 timestamp is changing */
1594                 cFYI(1, ("CIFS - CTIME changed"));
1595                 time_buf.ChangeTime =
1596                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1597         } else
1598                 time_buf.ChangeTime = 0;
1599
1600         if (set_time || set_dosattr) {
1601                 time_buf.CreationTime = 0;      /* do not change */
1602                 /* In the future we should experiment - try setting timestamps
1603                    via Handle (SetFileInfo) instead of by path */
1604                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1605                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1606                                              cifs_sb->local_nls,
1607                                              cifs_sb->mnt_cifs_flags &
1608                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1609                 else
1610                         rc = -EOPNOTSUPP;
1611
1612                 if (rc == -EOPNOTSUPP) {
1613                         int oplock = FALSE;
1614                         __u16 netfid;
1615
1616                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1617                                  "times not supported by this server"));
1618                         /* BB we could scan to see if we already have it open
1619                            and pass in pid of opener to function */
1620                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1621                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1622                                          CREATE_NOT_DIR, &netfid, &oplock,
1623                                          NULL, cifs_sb->local_nls,
1624                                          cifs_sb->mnt_cifs_flags &
1625                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1626                         if (rc == 0) {
1627                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1628                                                          netfid);
1629                                 CIFSSMBClose(xid, pTcon, netfid);
1630                         } else {
1631                         /* BB For even older servers we could convert time_buf
1632                            into old DOS style which uses two second
1633                            granularity */
1634
1635                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1636                                         &time_buf, cifs_sb->local_nls); */
1637                         }
1638                 }
1639                 /* Even if error on time set, no sense failing the call if
1640                 the server would set the time to a reasonable value anyway,
1641                 and this check ensures that we are not being called from
1642                 sys_utimes in which case we ought to fail the call back to
1643                 the user when the server rejects the call */
1644                 if ((rc) && (attrs->ia_valid &
1645                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1646                         rc = 0;
1647         }
1648
1649         /* do not need local check to inode_check_ok since the server does
1650            that */
1651         if (!rc)
1652                 rc = inode_setattr(direntry->d_inode, attrs);
1653 cifs_setattr_exit:
1654         kfree(full_path);
1655         FreeXid(xid);
1656         return rc;
1657 }
1658
1659 #if 0
1660 void cifs_delete_inode(struct inode *inode)
1661 {
1662         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1663         /* may have to add back in if and when safe distributed caching of
1664            directories added e.g. via FindNotify */
1665 }
1666 #endif