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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         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
 624         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 625                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 626                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 627                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 628                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 629                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 630                 cFYI(1, ("posix del rc %d", rc));
 631                 if ((rc == 0) || (rc == -ENOENT))
 632                         goto psx_del_no_retry;
 633         }
 634
 635         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 636                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 637 psx_del_no_retry:
 638         if (!rc) {
 639                 if (direntry->d_inode)
 640                         drop_nlink(direntry->d_inode);
 641         } else if (rc == -ENOENT) {
 642                 d_drop(direntry);
 643         } else if (rc == -ETXTBSY) {
 644                 int oplock = FALSE;
 645                 __u16 netfid;
 646
 647                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 648                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 649                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 650                                  cifs_sb->mnt_cifs_flags &
 651                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 652                 if (rc == 0) {
 653                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 654                                               cifs_sb->local_nls,
 655                                               cifs_sb->mnt_cifs_flags &
 656                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 657                         CIFSSMBClose(xid, pTcon, netfid);
 658                         if (direntry->d_inode)
 659                                 drop_nlink(direntry->d_inode);
 660                 }
 661         } else if (rc == -EACCES) {
 662                 /* try only if r/o attribute set in local lookup data? */
 663                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 664                 if (pinfo_buf) {
 665                         /* ATTRS set to normal clears r/o bit */
 666                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 667                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 668                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 669                                                      pinfo_buf,
 670                                                      cifs_sb->local_nls,
 671                                                      cifs_sb->mnt_cifs_flags &
 672                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 673                         else
 674                                 rc = -EOPNOTSUPP;
 675
 676                         if (rc == -EOPNOTSUPP) {
 677                                 int oplock = FALSE;
 678                                 __u16 netfid;
 679                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 680                                                           full_path,
 681                                                           (__u16)ATTR_NORMAL,
 682                                                           cifs_sb->local_nls);
 683                            For some strange reason it seems that NT4 eats the
 684                            old setattr call without actually setting the
 685                            attributes so on to the third attempted workaround
 686                            */
 687
 688                         /* BB could scan to see if we already have it open
 689                            and pass in pid of opener to function */
 690                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 691                                                  FILE_OPEN, SYNCHRONIZE |
 692                                                  FILE_WRITE_ATTRIBUTES, 0,
 693                                                  &netfid, &oplock, NULL,
 694                                                  cifs_sb->local_nls,
 695                                                  cifs_sb->mnt_cifs_flags &
 696                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 697                                 if (rc == 0) {
 698                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 699                                                                  pinfo_buf,
 700                                                                  netfid);
 701                                         CIFSSMBClose(xid, pTcon, netfid);
 702                                 }
 703                         }
 704                         kfree(pinfo_buf);
 705                 }
 706                 if (rc == 0) {
 707                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 708                                             cifs_sb->local_nls,
 709                                             cifs_sb->mnt_cifs_flags &
 710                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 711                         if (!rc) {
 712                                 if (direntry->d_inode)
 713                                         drop_nlink(direntry->d_inode);
 714                         } else if (rc == -ETXTBSY) {
 715                                 int oplock = FALSE;
 716                                 __u16 netfid;
 717
 718                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 719                                                  FILE_OPEN, DELETE,
 720                                                  CREATE_NOT_DIR |
 721                                                  CREATE_DELETE_ON_CLOSE,
 722                                                  &netfid, &oplock, NULL,
 723                                                  cifs_sb->local_nls,
 724                                                  cifs_sb->mnt_cifs_flags &
 725                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 726                                 if (rc == 0) {
 727                                         CIFSSMBRenameOpenFile(xid, pTcon,
 728                                                 netfid, NULL,
 729                                                 cifs_sb->local_nls,
 730                                                 cifs_sb->mnt_cifs_flags &
 731                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 732                                         CIFSSMBClose(xid, pTcon, netfid);
 733                                         if (direntry->d_inode)
 734                                                 drop_nlink(direntry->d_inode);
 735                                 }
 736                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 737                         }
 738                 }
 739         }
 740         if (direntry->d_inode) {
 741                 cifsInode = CIFS_I(direntry->d_inode);
 742                 cifsInode->time = 0;    /* will force revalidate to get info
 743                                            when needed */
 744                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 745         }
 746         if (inode) {
 747                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 748                 cifsInode = CIFS_I(inode);
 749                 cifsInode->time = 0;    /* force revalidate of dir as well */
 750         }
 751
 752         kfree(full_path);
 753         FreeXid(xid);
 754         return rc;
 755 }
 756
 757 static void posix_fill_in_inode(struct inode *tmp_inode,
 758         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 759 {
 760         loff_t local_size;
 761         struct timespec local_mtime;
 762
 763         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 764         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 765
 766         __u32 type = le32_to_cpu(pData->Type);
 767         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 768         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 769         cifsInfo->time = jiffies;
 770         atomic_inc(&cifsInfo->inUse);
 771
 772         /* save mtime and size */
 773         local_mtime = tmp_inode->i_mtime;
 774         local_size  = tmp_inode->i_size;
 775
 776         tmp_inode->i_atime =
 777             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 778         tmp_inode->i_mtime =
 779             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 780         tmp_inode->i_ctime =
 781             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 782
 783         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 784         /* since we set the inode type below we need to mask off type
 785            to avoid strange results if bits above were corrupt */
 786         tmp_inode->i_mode &= ~S_IFMT;
 787         if (type == UNIX_FILE) {
 788                 *pobject_type = DT_REG;
 789                 tmp_inode->i_mode |= S_IFREG;
 790         } else if (type == UNIX_SYMLINK) {
 791                 *pobject_type = DT_LNK;
 792                 tmp_inode->i_mode |= S_IFLNK;
 793         } else if (type == UNIX_DIR) {
 794                 *pobject_type = DT_DIR;
 795                 tmp_inode->i_mode |= S_IFDIR;
 796         } else if (type == UNIX_CHARDEV) {
 797                 *pobject_type = DT_CHR;
 798                 tmp_inode->i_mode |= S_IFCHR;
 799                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 800                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 801         } else if (type == UNIX_BLOCKDEV) {
 802                 *pobject_type = DT_BLK;
 803                 tmp_inode->i_mode |= S_IFBLK;
 804                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 805                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 806         } else if (type == UNIX_FIFO) {
 807                 *pobject_type = DT_FIFO;
 808                 tmp_inode->i_mode |= S_IFIFO;
 809         } else if (type == UNIX_SOCKET) {
 810                 *pobject_type = DT_SOCK;
 811                 tmp_inode->i_mode |= S_IFSOCK;
 812         } else {
 813                 /* safest to just call it a file */
 814                 *pobject_type = DT_REG;
 815                 tmp_inode->i_mode |= S_IFREG;
 816                 cFYI(1, ("unknown inode type %d", type));
 817         }
 818
 819 #ifdef CONFIG_CIFS_DEBUG2
 820         cFYI(1, ("object type: %d", type));
 821 #endif
 822         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 823         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 824         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 825
 826         spin_lock(&tmp_inode->i_lock);
 827         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 828                 /* can not safely change the file size here if the
 829                 client is writing to it due to potential races */
 830                 i_size_write(tmp_inode, end_of_file);
 831
 832         /* 512 bytes (2**9) is the fake blocksize that must be used */
 833         /* for this calculation, not the real blocksize */
 834                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 835         }
 836         spin_unlock(&tmp_inode->i_lock);
 837
 838         if (S_ISREG(tmp_inode->i_mode)) {
 839                 cFYI(1, ("File inode"));
 840                 tmp_inode->i_op = &cifs_file_inode_ops;
 841
 842                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 843                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 844                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 845                         else
 846                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 847
 848                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 849                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 850                 else
 851                         tmp_inode->i_fop = &cifs_file_ops;
 852
 853                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 854                    (cifs_sb->tcon->ses->server->maxBuf <
 855                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 856                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 857                 else
 858                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 859
 860                 if (isNewInode)
 861                         return; /* No sense invalidating pages for new inode
 862                                    since we we have not started caching
 863                                    readahead file data yet */
 864
 865                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 866                         (local_size == tmp_inode->i_size)) {
 867                         cFYI(1, ("inode exists but unchanged"));
 868                 } else {
 869                         /* file may have changed on server */
 870                         cFYI(1, ("invalidate inode, readdir detected change"));
 871                         invalidate_remote_inode(tmp_inode);
 872                 }
 873         } else if (S_ISDIR(tmp_inode->i_mode)) {
 874                 cFYI(1, ("Directory inode"));
 875                 tmp_inode->i_op = &cifs_dir_inode_ops;
 876                 tmp_inode->i_fop = &cifs_dir_ops;
 877         } else if (S_ISLNK(tmp_inode->i_mode)) {
 878                 cFYI(1, ("Symbolic Link inode"));
 879                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 880 /* tmp_inode->i_fop = *//* do not need to set to anything */
 881         } else {
 882                 cFYI(1, ("Special inode"));
 883                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 884                                    tmp_inode->i_rdev);
 885         }
 886 }
 887
 888 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 889 {
 890         int rc = 0;
 891         int xid;
 892         struct cifs_sb_info *cifs_sb;
 893         struct cifsTconInfo *pTcon;
 894         char *full_path = NULL;
 895         struct inode *newinode = NULL;
 896
 897         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 898
 899         xid = GetXid();
 900
 901         cifs_sb = CIFS_SB(inode->i_sb);
 902         pTcon = cifs_sb->tcon;
 903
 904         full_path = build_path_from_dentry(direntry);
 905         if (full_path == NULL) {
 906                 FreeXid(xid);
 907                 return -ENOMEM;
 908         }
 909
 910         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 911                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 912                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 913                 u32 oplock = 0;
 914                 FILE_UNIX_BASIC_INFO * pInfo =
 915                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 916                 if (pInfo == NULL) {
 917                         rc = -ENOMEM;
 918                         goto mkdir_out;
 919                 }
 920
 921                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 922                                 mode, NULL /* netfid */, pInfo, &oplock,
 923                                 full_path, cifs_sb->local_nls,
 924                                 cifs_sb->mnt_cifs_flags &
 925                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 926                 if (rc) {
 927                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 928                         d_drop(direntry);
 929                 } else {
 930                         int obj_type;
 931                         if (pInfo->Type == -1) /* no return info - go query */
 932                                 goto mkdir_get_info;
 933 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 934         to set uid/gid */
 935                         inc_nlink(inode);
 936                         if (pTcon->nocase)
 937                                 direntry->d_op = &cifs_ci_dentry_ops;
 938                         else
 939                                 direntry->d_op = &cifs_dentry_ops;
 940
 941                         newinode = new_inode(inode->i_sb);
 942                         if (newinode == NULL)
 943                                 goto mkdir_get_info;
 944                         /* Is an i_ino of zero legal? */
 945                         /* Are there sanity checks we can use to ensure that
 946                            the server is really filling in that field? */
 947                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 948                                 newinode->i_ino =
 949                                         (unsigned long)pInfo->UniqueId;
 950                         } /* note ino incremented to unique num in new_inode */
 951                         if (inode->i_sb->s_flags & MS_NOATIME)
 952                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 953                         newinode->i_nlink = 2;
 954
 955                         insert_inode_hash(newinode);
 956                         d_instantiate(direntry, newinode);
 957
 958                         /* we already checked in POSIXCreate whether
 959                            frame was long enough */
 960                         posix_fill_in_inode(direntry->d_inode,
 961                                         pInfo, &obj_type, 1 /* NewInode */);
 962 #ifdef CONFIG_CIFS_DEBUG2
 963                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 964                                 direntry, direntry->d_name.name, newinode));
 965
 966                         if (newinode->i_nlink != 2)
 967                                 cFYI(1, ("unexpected number of links %d",
 968                                         newinode->i_nlink));
 969 #endif
 970                 }
 971                 kfree(pInfo);
 972                 goto mkdir_out;
 973         }
 974
 975         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 976         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 977                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 978         if (rc) {
 979                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 980                 d_drop(direntry);
 981         } else {
 982 mkdir_get_info:
 983                 inc_nlink(inode);
 984                 if (pTcon->ses->capabilities & CAP_UNIX)
 985                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 986                                                       inode->i_sb, xid);
 987                 else
 988                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 989                                                  inode->i_sb, xid);
 990
 991                 if (pTcon->nocase)
 992                         direntry->d_op = &cifs_ci_dentry_ops;
 993                 else
 994                         direntry->d_op = &cifs_dentry_ops;
 995                 d_instantiate(direntry, newinode);
 996                  /* setting nlink not necessary except in cases where we
 997                   * failed to get it from the server or was set bogus */
 998                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
 999                                 direntry->d_inode->i_nlink = 2;
1000                 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1001                         mode &= ~current->fs->umask;
1002                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1003                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1004                                                     mode,
1005                                                     (__u64)current->fsuid,
1006                                                     (__u64)current->fsgid,
1007                                                     0 /* dev_t */,
1008                                                     cifs_sb->local_nls,
1009                                                     cifs_sb->mnt_cifs_flags &
1010                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1011                         } else {
1012                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1013                                                     mode, (__u64)-1,
1014                                                     (__u64)-1, 0 /* dev_t */,
1015                                                     cifs_sb->local_nls,
1016                                                     cifs_sb->mnt_cifs_flags &
1017                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1018                         }
1019                 } else {
1020                         /* BB to be implemented via Windows secrty descriptors
1021                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1022                                                  -1, -1, local_nls); */
1023                         if (direntry->d_inode) {
1024                                 direntry->d_inode->i_mode = mode;
1025                                 direntry->d_inode->i_mode |= S_IFDIR;
1026                                 if (cifs_sb->mnt_cifs_flags &
1027                                      CIFS_MOUNT_SET_UID) {
1028                                         direntry->d_inode->i_uid =
1029                                                 current->fsuid;
1030                                         direntry->d_inode->i_gid =
1031                                                 current->fsgid;
1032                                 }
1033                         }
1034                 }
1035         }
1036 mkdir_out:
1037         kfree(full_path);
1038         FreeXid(xid);
1039         return rc;
1040 }
1041
1042 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1043 {
1044         int rc = 0;
1045         int xid;
1046         struct cifs_sb_info *cifs_sb;
1047         struct cifsTconInfo *pTcon;
1048         char *full_path = NULL;
1049         struct cifsInodeInfo *cifsInode;
1050
1051         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1052
1053         xid = GetXid();
1054
1055         cifs_sb = CIFS_SB(inode->i_sb);
1056         pTcon = cifs_sb->tcon;
1057
1058         full_path = build_path_from_dentry(direntry);
1059         if (full_path == NULL) {
1060                 FreeXid(xid);
1061                 return -ENOMEM;
1062         }
1063
1064         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1065                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1066
1067         if (!rc) {
1068                 drop_nlink(inode);
1069                 spin_lock(&direntry->d_inode->i_lock);
1070                 i_size_write(direntry->d_inode, 0);
1071                 clear_nlink(direntry->d_inode);
1072                 spin_unlock(&direntry->d_inode->i_lock);
1073         }
1074
1075         cifsInode = CIFS_I(direntry->d_inode);
1076         cifsInode->time = 0;    /* force revalidate to go get info when
1077                                    needed */
1078         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1079                 current_fs_time(inode->i_sb);
1080
1081         kfree(full_path);
1082         FreeXid(xid);
1083         return rc;
1084 }
1085
1086 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1087         struct inode *target_inode, struct dentry *target_direntry)
1088 {
1089         char *fromName;
1090         char *toName;
1091         struct cifs_sb_info *cifs_sb_source;
1092         struct cifs_sb_info *cifs_sb_target;
1093         struct cifsTconInfo *pTcon;
1094         int xid;
1095         int rc = 0;
1096
1097         xid = GetXid();
1098
1099         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1100         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1101         pTcon = cifs_sb_source->tcon;
1102
1103         if (pTcon != cifs_sb_target->tcon) {
1104                 FreeXid(xid);
1105                 return -EXDEV;  /* BB actually could be allowed if same server,
1106                                    but different share.
1107                                    Might eventually add support for this */
1108         }
1109
1110         /* we already  have the rename sem so we do not need to grab it again
1111            here to protect the path integrity */
1112         fromName = build_path_from_dentry(source_direntry);
1113         toName = build_path_from_dentry(target_direntry);
1114         if ((fromName == NULL) || (toName == NULL)) {
1115                 rc = -ENOMEM;
1116                 goto cifs_rename_exit;
1117         }
1118
1119         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1120                            cifs_sb_source->local_nls,
1121                            cifs_sb_source->mnt_cifs_flags &
1122                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1123         if (rc == -EEXIST) {
1124                 /* check if they are the same file because rename of hardlinked
1125                    files is a noop */
1126                 FILE_UNIX_BASIC_INFO *info_buf_source;
1127                 FILE_UNIX_BASIC_INFO *info_buf_target;
1128
1129                 info_buf_source =
1130                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1131                 if (info_buf_source != NULL) {
1132                         info_buf_target = info_buf_source + 1;
1133                         if (pTcon->ses->capabilities & CAP_UNIX)
1134                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1135                                         info_buf_source,
1136                                         cifs_sb_source->local_nls,
1137                                         cifs_sb_source->mnt_cifs_flags &
1138                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1139                         /* else rc is still EEXIST so will fall through to
1140                            unlink the target and retry rename */
1141                         if (rc == 0) {
1142                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1143                                                 info_buf_target,
1144                                                 cifs_sb_target->local_nls,
1145                                                 /* remap based on source sb */
1146                                                 cifs_sb_source->mnt_cifs_flags &
1147                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1148                         }
1149                         if ((rc == 0) &&
1150                             (info_buf_source->UniqueId ==
1151                              info_buf_target->UniqueId)) {
1152                         /* do not rename since the files are hardlinked which
1153                            is a noop */
1154                         } else {
1155                         /* we either can not tell the files are hardlinked
1156                            (as with Windows servers) or files are not
1157                            hardlinked so delete the target manually before
1158                            renaming to follow POSIX rather than Windows
1159                            semantics */
1160                                 cifs_unlink(target_inode, target_direntry);
1161                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1162                                                    toName,
1163                                                    cifs_sb_source->local_nls,
1164                                                    cifs_sb_source->mnt_cifs_flags
1165                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1166                         }
1167                         kfree(info_buf_source);
1168                 } /* if we can not get memory just leave rc as EEXIST */
1169         }
1170
1171         if (rc) {
1172                 cFYI(1, ("rename rc %d", rc));
1173         }
1174
1175         if ((rc == -EIO) || (rc == -EEXIST)) {
1176                 int oplock = FALSE;
1177                 __u16 netfid;
1178
1179                 /* BB FIXME Is Generic Read correct for rename? */
1180                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1181                    need to test renaming open directory, also GENERIC_READ
1182                    might not right be right access to request */
1183                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1184                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1185                                  cifs_sb_source->local_nls,
1186                                  cifs_sb_source->mnt_cifs_flags &
1187                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1188                 if (rc == 0) {
1189                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1190                                               cifs_sb_source->local_nls,
1191                                               cifs_sb_source->mnt_cifs_flags &
1192                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1193                         CIFSSMBClose(xid, pTcon, netfid);
1194                 }
1195         }
1196
1197 cifs_rename_exit:
1198         kfree(fromName);
1199         kfree(toName);
1200         FreeXid(xid);
1201         return rc;
1202 }
1203
1204 int cifs_revalidate(struct dentry *direntry)
1205 {
1206         int xid;
1207         int rc = 0;
1208         char *full_path;
1209         struct cifs_sb_info *cifs_sb;
1210         struct cifsInodeInfo *cifsInode;
1211         loff_t local_size;
1212         struct timespec local_mtime;
1213         int invalidate_inode = FALSE;
1214
1215         if (direntry->d_inode == NULL)
1216                 return -ENOENT;
1217
1218         cifsInode = CIFS_I(direntry->d_inode);
1219
1220         if (cifsInode == NULL)
1221                 return -ENOENT;
1222
1223         /* no sense revalidating inode info on file that no one can write */
1224         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1225                 return rc;
1226
1227         xid = GetXid();
1228
1229         cifs_sb = CIFS_SB(direntry->d_sb);
1230
1231         /* can not safely grab the rename sem here if rename calls revalidate
1232            since that would deadlock */
1233         full_path = build_path_from_dentry(direntry);
1234         if (full_path == NULL) {
1235                 FreeXid(xid);
1236                 return -ENOMEM;
1237         }
1238         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1239                  "jiffies %ld", full_path, direntry->d_inode,
1240                  direntry->d_inode->i_count.counter, direntry,
1241                  direntry->d_time, jiffies));
1242
1243         if (cifsInode->time == 0) {
1244                 /* was set to zero previously to force revalidate */
1245         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1246                    lookupCacheEnabled) {
1247                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1248                     (direntry->d_inode->i_nlink == 1)) {
1249                         kfree(full_path);
1250                         FreeXid(xid);
1251                         return rc;
1252                 } else {
1253                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1254                 }
1255         }
1256
1257         /* save mtime and size */
1258         local_mtime = direntry->d_inode->i_mtime;
1259         local_size = direntry->d_inode->i_size;
1260
1261         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1262                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1263                                               direntry->d_sb, xid);
1264                 if (rc) {
1265                         cFYI(1, ("error on getting revalidate info %d", rc));
1266 /*                      if (rc != -ENOENT)
1267                                 rc = 0; */      /* BB should we cache info on
1268                                                    certain errors? */
1269                 }
1270         } else {
1271                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1272                                          direntry->d_sb, xid);
1273                 if (rc) {
1274                         cFYI(1, ("error on getting revalidate info %d", rc));
1275 /*                      if (rc != -ENOENT)
1276                                 rc = 0; */      /* BB should we cache info on
1277                                                    certain errors? */
1278                 }
1279         }
1280         /* should we remap certain errors, access denied?, to zero */
1281
1282         /* if not oplocked, we invalidate inode pages if mtime or file size
1283            had changed on server */
1284
1285         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1286             (local_size == direntry->d_inode->i_size)) {
1287                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1288         } else {
1289                 /* file may have changed on server */
1290                 if (cifsInode->clientCanCacheRead) {
1291                         /* no need to invalidate inode pages since we were the
1292                            only ones who could have modified the file and the
1293                            server copy is staler than ours */
1294                 } else {
1295                         invalidate_inode = TRUE;
1296                 }
1297         }
1298
1299         /* can not grab this sem since kernel filesys locking documentation
1300            indicates i_mutex may be taken by the kernel on lookup and rename
1301            which could deadlock if we grab the i_mutex here as well */
1302 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1303         /* need to write out dirty pages here  */
1304         if (direntry->d_inode->i_mapping) {
1305                 /* do we need to lock inode until after invalidate completes
1306                    below? */
1307                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1308         }
1309         if (invalidate_inode) {
1310         /* shrink_dcache not necessary now that cifs dentry ops
1311         are exported for negative dentries */
1312 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1313                         shrink_dcache_parent(direntry); */
1314                 if (S_ISREG(direntry->d_inode->i_mode)) {
1315                         if (direntry->d_inode->i_mapping)
1316                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1317                         /* may eventually have to do this for open files too */
1318                         if (list_empty(&(cifsInode->openFileList))) {
1319                                 /* changed on server - flush read ahead pages */
1320                                 cFYI(1, ("Invalidating read ahead data on "
1321                                          "closed file"));
1322                                 invalidate_remote_inode(direntry->d_inode);
1323                         }
1324                 }
1325         }
1326 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1327
1328         kfree(full_path);
1329         FreeXid(xid);
1330         return rc;
1331 }
1332
1333 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1334         struct kstat *stat)
1335 {
1336         int err = cifs_revalidate(dentry);
1337         if (!err) {
1338                 generic_fillattr(dentry->d_inode, stat);
1339                 stat->blksize = CIFS_MAX_MSGSIZE;
1340         }
1341         return err;
1342 }
1343
1344 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1345 {
1346         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1347         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1348         struct page *page;
1349         char *kaddr;
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 ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
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