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   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32 int cifs_get_inode_info_unix(struct inode **pinode,
  33         const unsigned char *search_path, struct super_block *sb, int xid)
  34 {
  35         int rc = 0;
  36         FILE_UNIX_BASIC_INFO findData;
  37         struct cifsTconInfo *pTcon;
  38         struct inode *inode;
  39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  40         char *tmp_path;
  41
  42         pTcon = cifs_sb->tcon;
  43         cFYI(1, ("Getting info on %s", search_path));
  44         /* could have done a find first instead but this returns more info */
  45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  49                  sizeof(findData)); */
  50         if (rc) {
  51                 if (rc == -EREMOTE) {
  52                         tmp_path =
  53                             kmalloc(strnlen(pTcon->treeName,
  54                                             MAX_TREE_SIZE + 1) +
  55                                     strnlen(search_path, MAX_PATHCONF) + 1,
  56                                     GFP_KERNEL);
  57                         if (tmp_path == NULL) {
  58                                 return -ENOMEM;
  59                         }
  60                         /* have to skip first of the double backslash of
  61                            UNC name */
  62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  63                         strncat(tmp_path, search_path, MAX_PATHCONF);
  64                         rc = connect_to_dfs_path(xid, pTcon->ses,
  65                                                  /* treename + */ tmp_path,
  66                                                  cifs_sb->local_nls,
  67                                                  cifs_sb->mnt_cifs_flags &
  68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  69                         kfree(tmp_path);
  70
  71                         /* BB fix up inode etc. */
  72                 } else if (rc) {
  73                         return rc;
  74                 }
  75         } else {
  76                 struct cifsInodeInfo *cifsInfo;
  77                 __u32 type = le32_to_cpu(findData.Type);
  78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  80
  81                 /* get new inode */
  82                 if (*pinode == NULL) {
  83                         *pinode = new_inode(sb);
  84                         if (*pinode == NULL)
  85                                 return -ENOMEM;
  86                         /* Is an i_ino of zero legal? */
  87                         /* Are there sanity checks we can use to ensure that
  88                            the server is really filling in that field? */
  89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  90                                 (*pinode)->i_ino =
  91                                         (unsigned long)findData.UniqueId;
  92                         } /* note ino incremented to unique num in new_inode */
  93                         if (sb->s_flags & MS_NOATIME)
  94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
  95
  96                         insert_inode_hash(*pinode);
  97                 }
  98
  99                 inode = *pinode;
 100                 cifsInfo = CIFS_I(inode);
 101
 102                 cFYI(1, ("Old time %ld", cifsInfo->time));
 103                 cifsInfo->time = jiffies;
 104                 cFYI(1, ("New time %ld", cifsInfo->time));
 105                 /* this is ok to set on every inode revalidate */
 106                 atomic_set(&cifsInfo->inUse, 1);
 107
 108                 inode->i_atime =
 109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 110                 inode->i_mtime =
 111                     cifs_NTtimeToUnix(le64_to_cpu
 112                                 (findData.LastModificationTime));
 113                 inode->i_ctime =
 114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 115                 inode->i_mode = le64_to_cpu(findData.Permissions);
 116                 /* since we set the inode type below we need to mask off
 117                    to avoid strange results if bits set above */
 118                         inode->i_mode &= ~S_IFMT;
 119                 if (type == UNIX_FILE) {
 120                         inode->i_mode |= S_IFREG;
 121                 } else if (type == UNIX_SYMLINK) {
 122                         inode->i_mode |= S_IFLNK;
 123                 } else if (type == UNIX_DIR) {
 124                         inode->i_mode |= S_IFDIR;
 125                 } else if (type == UNIX_CHARDEV) {
 126                         inode->i_mode |= S_IFCHR;
 127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 129                 } else if (type == UNIX_BLOCKDEV) {
 130                         inode->i_mode |= S_IFBLK;
 131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 133                 } else if (type == UNIX_FIFO) {
 134                         inode->i_mode |= S_IFIFO;
 135                 } else if (type == UNIX_SOCKET) {
 136                         inode->i_mode |= S_IFSOCK;
 137                 } else {
 138                         /* safest to call it a file if we do not know */
 139                         inode->i_mode |= S_IFREG;
 140                         cFYI(1, ("unknown type %d", type));
 141                 }
 142
 143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 144                         inode->i_uid = cifs_sb->mnt_uid;
 145                 else
 146                         inode->i_uid = le64_to_cpu(findData.Uid);
 147
 148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 149                         inode->i_gid = cifs_sb->mnt_gid;
 150                 else
 151                         inode->i_gid = le64_to_cpu(findData.Gid);
 152
 153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 154
 155                 spin_lock(&inode->i_lock);
 156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 157                 /* can not safely change the file size here if the
 158                    client is writing to it due to potential races */
 159                         i_size_write(inode, end_of_file);
 160
 161                 /* blksize needs to be multiple of two. So safer to default to
 162                 blksize and blkbits set in superblock so 2**blkbits and blksize
 163                 will match rather than setting to:
 164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 165
 166                 /* This seems incredibly stupid but it turns out that i_blocks
 167                    is not related to (i_size / i_blksize), instead 512 byte size
 168                    is required for calculating num blocks */
 169
 170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 171                 /* for this calculation */
 172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 173                 }
 174                 spin_unlock(&inode->i_lock);
 175
 176                 if (num_of_bytes < end_of_file)
 177                         cFYI(1, ("allocation size less than end of file"));
 178                 cFYI(1, ("Size %ld and blocks %llu",
 179                         (unsigned long) inode->i_size,
 180                         (unsigned long long)inode->i_blocks));
 181                 if (S_ISREG(inode->i_mode)) {
 182                         cFYI(1, ("File inode"));
 183                         inode->i_op = &cifs_file_inode_ops;
 184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 186                                         inode->i_fop =
 187                                                 &cifs_file_direct_nobrl_ops;
 188                                 else
 189                                         inode->i_fop = &cifs_file_direct_ops;
 190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 191                                 inode->i_fop = &cifs_file_nobrl_ops;
 192                         else /* not direct, send byte range locks */
 193                                 inode->i_fop = &cifs_file_ops;
 194
 195                         /* check if server can support readpages */
 196                         if (pTcon->ses->server->maxBuf <
 197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 199                         else
 200                                 inode->i_data.a_ops = &cifs_addr_ops;
 201                 } else if (S_ISDIR(inode->i_mode)) {
 202                         cFYI(1, ("Directory inode"));
 203                         inode->i_op = &cifs_dir_inode_ops;
 204                         inode->i_fop = &cifs_dir_ops;
 205                 } else if (S_ISLNK(inode->i_mode)) {
 206                         cFYI(1, ("Symbolic Link inode"));
 207                         inode->i_op = &cifs_symlink_inode_ops;
 208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 209                 } else {
 210                         cFYI(1, ("Init special inode"));
 211                         init_special_inode(inode, inode->i_mode,
 212                                            inode->i_rdev);
 213                 }
 214         }
 215         return rc;
 216 }
 217
 218 static int decode_sfu_inode(struct inode *inode, __u64 size,
 219                             const unsigned char *path,
 220                             struct cifs_sb_info *cifs_sb, int xid)
 221 {
 222         int rc;
 223         int oplock = FALSE;
 224         __u16 netfid;
 225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 226         char buf[24];
 227         unsigned int bytes_read;
 228         char *pbuf;
 229
 230         pbuf = buf;
 231
 232         if (size == 0) {
 233                 inode->i_mode |= S_IFIFO;
 234                 return 0;
 235         } else if (size < 8) {
 236                 return -EINVAL;  /* EOPNOTSUPP? */
 237         }
 238
 239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 241                          cifs_sb->local_nls,
 242                          cifs_sb->mnt_cifs_flags &
 243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 244         if (rc == 0) {
 245                 int buf_type = CIFS_NO_BUFFER;
 246                         /* Read header */
 247                 rc = CIFSSMBRead(xid, pTcon,
 248                                  netfid,
 249                                  24 /* length */, 0 /* offset */,
 250                                  &bytes_read, &pbuf, &buf_type);
 251                 if ((rc == 0) && (bytes_read >= 8)) {
 252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 253                                 cFYI(1, ("Block device"));
 254                                 inode->i_mode |= S_IFBLK;
 255                                 if (bytes_read == 24) {
 256                                         /* we have enough to decode dev num */
 257                                         __u64 mjr; /* major */
 258                                         __u64 mnr; /* minor */
 259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 261                                         inode->i_rdev = MKDEV(mjr, mnr);
 262                                 }
 263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 264                                 cFYI(1, ("Char device"));
 265                                 inode->i_mode |= S_IFCHR;
 266                                 if (bytes_read == 24) {
 267                                         /* we have enough to decode dev num */
 268                                         __u64 mjr; /* major */
 269                                         __u64 mnr; /* minor */
 270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 272                                         inode->i_rdev = MKDEV(mjr, mnr);
 273                                 }
 274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 275                                 cFYI(1, ("Symlink"));
 276                                 inode->i_mode |= S_IFLNK;
 277                         } else {
 278                                 inode->i_mode |= S_IFREG; /* file? */
 279                                 rc = -EOPNOTSUPP;
 280                         }
 281                 } else {
 282                         inode->i_mode |= S_IFREG; /* then it is a file */
 283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 284                 }
 285                 CIFSSMBClose(xid, pTcon, netfid);
 286         }
 287         return rc;
 288 }
 289
 290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 291
 292 static int get_sfu_uid_mode(struct inode *inode,
 293                         const unsigned char *path,
 294                         struct cifs_sb_info *cifs_sb, int xid)
 295 {
 296 #ifdef CONFIG_CIFS_XATTR
 297         ssize_t rc;
 298         char ea_value[4];
 299         __u32 mode;
 300
 301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 304         if (rc < 0)
 305                 return (int)rc;
 306         else if (rc > 3) {
 307                 mode = le32_to_cpu(*((__le32 *)ea_value));
 308                 inode->i_mode &= ~SFBITS_MASK;
 309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 311                 cFYI(1, ("special mode bits 0%o", mode));
 312                 return 0;
 313         } else {
 314                 return 0;
 315         }
 316 #else
 317         return -EOPNOTSUPP;
 318 #endif
 319 }
 320
 321 int cifs_get_inode_info(struct inode **pinode,
 322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 323         struct super_block *sb, int xid)
 324 {
 325         int rc = 0;
 326         struct cifsTconInfo *pTcon;
 327         struct inode *inode;
 328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 329         char *tmp_path;
 330         char *buf = NULL;
 331         int adjustTZ = FALSE;
 332
 333         pTcon = cifs_sb->tcon;
 334         cFYI(1, ("Getting info on %s", search_path));
 335
 336         if ((pfindData == NULL) && (*pinode != NULL)) {
 337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 338                         cFYI(1, ("No need to revalidate cached inode sizes"));
 339                         return rc;
 340                 }
 341         }
 342
 343         /* if file info not passed in then get it from server */
 344         if (pfindData == NULL) {
 345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 346                 if (buf == NULL)
 347                         return -ENOMEM;
 348                 pfindData = (FILE_ALL_INFO *)buf;
 349                 /* could do find first instead but this returns more info */
 350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 351                               0 /* not legacy */,
 352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 354                 /* BB optimize code so we do not make the above call
 355                 when server claims no NT SMB support and the above call
 356                 failed at least once - set flag in tcon or mount */
 357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 358                         rc = SMBQueryInformation(xid, pTcon, search_path,
 359                                         pfindData, cifs_sb->local_nls,
 360                                         cifs_sb->mnt_cifs_flags &
 361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 362                         adjustTZ = TRUE;
 363                 }
 364         }
 365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 366         if (rc) {
 367                 if (rc == -EREMOTE) {
 368                         tmp_path =
 369                             kmalloc(strnlen
 370                                     (pTcon->treeName,
 371                                      MAX_TREE_SIZE + 1) +
 372                                     strnlen(search_path, MAX_PATHCONF) + 1,
 373                                     GFP_KERNEL);
 374                         if (tmp_path == NULL) {
 375                                 kfree(buf);
 376                                 return -ENOMEM;
 377                         }
 378
 379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 380                         strncat(tmp_path, search_path, MAX_PATHCONF);
 381                         rc = connect_to_dfs_path(xid, pTcon->ses,
 382                                                  /* treename + */ tmp_path,
 383                                                  cifs_sb->local_nls,
 384                                                  cifs_sb->mnt_cifs_flags &
 385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 386                         kfree(tmp_path);
 387                         /* BB fix up inode etc. */
 388                 } else if (rc) {
 389                         kfree(buf);
 390                         return rc;
 391                 }
 392         } else {
 393                 struct cifsInodeInfo *cifsInfo;
 394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 395
 396                 /* get new inode */
 397                 if (*pinode == NULL) {
 398                         *pinode = new_inode(sb);
 399                         if (*pinode == NULL) {
 400                                 kfree(buf);
 401                                 return -ENOMEM;
 402                         }
 403                         /* Is an i_ino of zero legal? Can we use that to check
 404                            if the server supports returning inode numbers?  Are
 405                            there other sanity checks we can use to ensure that
 406                            the server is really filling in that field? */
 407
 408                         /* We can not use the IndexNumber field by default from
 409                            Windows or Samba (in ALL_INFO buf) but we can request
 410                            it explicitly.  It may not be unique presumably if
 411                            the server has multiple devices mounted under one
 412                            share */
 413
 414                         /* There may be higher info levels that work but are
 415                            there Windows server or network appliances for which
 416                            IndexNumber field is not guaranteed unique? */
 417
 418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 419                                 int rc1 = 0;
 420                                 __u64 inode_num;
 421
 422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 423                                         search_path, &inode_num,
 424                                         cifs_sb->local_nls,
 425                                         cifs_sb->mnt_cifs_flags &
 426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 427                                 if (rc1) {
 428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 430                                 } else /* do we need cast or hash to ino? */
 431                                         (*pinode)->i_ino = inode_num;
 432                         } /* else ino incremented to unique num in new_inode*/
 433                         if (sb->s_flags & MS_NOATIME)
 434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 435                         insert_inode_hash(*pinode);
 436                 }
 437                 inode = *pinode;
 438                 cifsInfo = CIFS_I(inode);
 439                 cifsInfo->cifsAttrs = attr;
 440                 cFYI(1, ("Old time %ld", cifsInfo->time));
 441                 cifsInfo->time = jiffies;
 442                 cFYI(1, ("New time %ld", cifsInfo->time));
 443
 444                 /* blksize needs to be multiple of two. So safer to default to
 445                 blksize and blkbits set in superblock so 2**blkbits and blksize
 446                 will match rather than setting to:
 447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 448
 449                 /* Linux can not store file creation time so ignore it */
 450                 if (pfindData->LastAccessTime)
 451                         inode->i_atime = cifs_NTtimeToUnix
 452                                 (le64_to_cpu(pfindData->LastAccessTime));
 453                 else /* do not need to use current_fs_time - time not stored */
 454                         inode->i_atime = CURRENT_TIME;
 455                 inode->i_mtime =
 456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 457                 inode->i_ctime =
 458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 459                 cFYI(0, ("Attributes came in as 0x%x", attr));
 460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 463                 }
 464
 465                 /* set default mode. will override for dirs below */
 466                 if (atomic_read(&cifsInfo->inUse) == 0)
 467                         /* new inode, can safely set these fields */
 468                         inode->i_mode = cifs_sb->mnt_file_mode;
 469                 else /* since we set the inode type below we need to mask off
 470                      to avoid strange results if type changes and both
 471                      get orred in */
 472                         inode->i_mode &= ~S_IFMT;
 473 /*              if (attr & ATTR_REPARSE)  */
 474                 /* We no longer handle these as symlinks because we could not
 475                    follow them due to the absolute path with drive letter */
 476                 if (attr & ATTR_DIRECTORY) {
 477                 /* override default perms since we do not do byte range locking
 478                    on dirs */
 479                         inode->i_mode = cifs_sb->mnt_dir_mode;
 480                         inode->i_mode |= S_IFDIR;
 481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 483                            /* No need to le64 convert size of zero */
 484                            (pfindData->EndOfFile == 0)) {
 485                         inode->i_mode = cifs_sb->mnt_file_mode;
 486                         inode->i_mode |= S_IFIFO;
 487 /* BB Finish for SFU style symlinks and devices */
 488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 490                         if (decode_sfu_inode(inode,
 491                                          le64_to_cpu(pfindData->EndOfFile),
 492                                          search_path,
 493                                          cifs_sb, xid)) {
 494                                 cFYI(1, ("Unrecognized sfu inode type"));
 495                         }
 496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
 497                 } else {
 498                         inode->i_mode |= S_IFREG;
 499                         /* treat the dos attribute of read-only as read-only
 500                            mode e.g. 555 */
 501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 502                                 inode->i_mode &= ~(S_IWUGO);
 503                         else if ((inode->i_mode & S_IWUGO) == 0)
 504                                 /* the ATTR_READONLY flag may have been */
 505                                 /* changed on server -- set any w bits  */
 506                                 /* allowed by mnt_file_mode             */
 507                                 inode->i_mode |= (S_IWUGO &
 508                                                   cifs_sb->mnt_file_mode);
 509                 /* BB add code here -
 510                    validate if device or weird share or device type? */
 511                 }
 512
 513                 spin_lock(&inode->i_lock);
 514                 if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
 515                         /* can not safely shrink the file size here if the
 516                            client is writing to it due to potential races */
 517                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 518
 519                         /* 512 bytes (2**9) is the fake blocksize that must be
 520                            used for this calculation */
 521                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 522                                            pfindData->AllocationSize)) >> 9;
 523                 }
 524                 spin_unlock(&inode->i_lock);
 525
 526                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 527
 528                 /* BB fill in uid and gid here? with help from winbind?
 529                    or retrieve from NTFS stream extended attribute */
 530                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 531                         /* fill in uid, gid, mode from server ACL */
 532                         /* BB FIXME this should also take into account the
 533                          * default uid specified on mount if present */
 534                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
 535                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 536                         inode->i_uid = cifs_sb->mnt_uid;
 537                         inode->i_gid = cifs_sb->mnt_gid;
 538                         /* set so we do not keep refreshing these fields with
 539                            bad data after user has changed them in memory */
 540                         atomic_set(&cifsInfo->inUse, 1);
 541                 }
 542
 543                 if (S_ISREG(inode->i_mode)) {
 544                         cFYI(1, ("File inode"));
 545                         inode->i_op = &cifs_file_inode_ops;
 546                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 547                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 548                                         inode->i_fop =
 549                                                 &cifs_file_direct_nobrl_ops;
 550                                 else
 551                                         inode->i_fop = &cifs_file_direct_ops;
 552                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 553                                 inode->i_fop = &cifs_file_nobrl_ops;
 554                         else /* not direct, send byte range locks */
 555                                 inode->i_fop = &cifs_file_ops;
 556
 557                         if (pTcon->ses->server->maxBuf <
 558                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 559                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 560                         else
 561                                 inode->i_data.a_ops = &cifs_addr_ops;
 562                 } else if (S_ISDIR(inode->i_mode)) {
 563                         cFYI(1, ("Directory inode"));
 564                         inode->i_op = &cifs_dir_inode_ops;
 565                         inode->i_fop = &cifs_dir_ops;
 566                 } else if (S_ISLNK(inode->i_mode)) {
 567                         cFYI(1, ("Symbolic Link inode"));
 568                         inode->i_op = &cifs_symlink_inode_ops;
 569                 } else {
 570                         init_special_inode(inode, inode->i_mode,
 571                                            inode->i_rdev);
 572                 }
 573         }
 574         kfree(buf);
 575         return rc;
 576 }
 577
 578 /* gets root inode */
 579 void cifs_read_inode(struct inode *inode)
 580 {
 581         int xid;
 582         struct cifs_sb_info *cifs_sb;
 583
 584         cifs_sb = CIFS_SB(inode->i_sb);
 585         xid = GetXid();
 586
 587         if (cifs_sb->tcon->unix_ext)
 588                 cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 589         else
 590                 cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 591         /* can not call macro FreeXid here since in a void func */
 592         _FreeXid(xid);
 593 }
 594
 595 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 596 {
 597         int rc = 0;
 598         int xid;
 599         struct cifs_sb_info *cifs_sb;
 600         struct cifsTconInfo *pTcon;
 601         char *full_path = NULL;
 602         struct cifsInodeInfo *cifsInode;
 603         FILE_BASIC_INFO *pinfo_buf;
 604
 605         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 606
 607         xid = GetXid();
 608
 609         if (inode)
 610                 cifs_sb = CIFS_SB(inode->i_sb);
 611         else
 612                 cifs_sb = CIFS_SB(direntry->d_sb);
 613         pTcon = cifs_sb->tcon;
 614
 615         /* Unlink can be called from rename so we can not grab the sem here
 616            since we deadlock otherwise */
 617 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 618         full_path = build_path_from_dentry(direntry);
 619 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 620         if (full_path == NULL) {
 621                 FreeXid(xid);
 622                 return -ENOMEM;
 623         }
 624
 625         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 626                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 627                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 628                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 629                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 630                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 631                 cFYI(1, ("posix del rc %d", rc));
 632                 if ((rc == 0) || (rc == -ENOENT))
 633                         goto psx_del_no_retry;
 634         }
 635
 636         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 637                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 638 psx_del_no_retry:
 639         if (!rc) {
 640                 if (direntry->d_inode)
 641                         drop_nlink(direntry->d_inode);
 642         } else if (rc == -ENOENT) {
 643                 d_drop(direntry);
 644         } else if (rc == -ETXTBSY) {
 645                 int oplock = FALSE;
 646                 __u16 netfid;
 647
 648                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 649                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 650                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 651                                  cifs_sb->mnt_cifs_flags &
 652                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 653                 if (rc == 0) {
 654                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 655                                               cifs_sb->local_nls,
 656                                               cifs_sb->mnt_cifs_flags &
 657                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 658                         CIFSSMBClose(xid, pTcon, netfid);
 659                         if (direntry->d_inode)
 660                                 drop_nlink(direntry->d_inode);
 661                 }
 662         } else if (rc == -EACCES) {
 663                 /* try only if r/o attribute set in local lookup data? */
 664                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 665                 if (pinfo_buf) {
 666                         /* ATTRS set to normal clears r/o bit */
 667                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 668                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 669                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 670                                                      pinfo_buf,
 671                                                      cifs_sb->local_nls,
 672                                                      cifs_sb->mnt_cifs_flags &
 673                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 674                         else
 675                                 rc = -EOPNOTSUPP;
 676
 677                         if (rc == -EOPNOTSUPP) {
 678                                 int oplock = FALSE;
 679                                 __u16 netfid;
 680                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 681                                                           full_path,
 682                                                           (__u16)ATTR_NORMAL,
 683                                                           cifs_sb->local_nls);
 684                            For some strange reason it seems that NT4 eats the
 685                            old setattr call without actually setting the
 686                            attributes so on to the third attempted workaround
 687                            */
 688
 689                         /* BB could scan to see if we already have it open
 690                            and pass in pid of opener to function */
 691                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 692                                                  FILE_OPEN, SYNCHRONIZE |
 693                                                  FILE_WRITE_ATTRIBUTES, 0,
 694                                                  &netfid, &oplock, NULL,
 695                                                  cifs_sb->local_nls,
 696                                                  cifs_sb->mnt_cifs_flags &
 697                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 698                                 if (rc == 0) {
 699                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 700                                                                  pinfo_buf,
 701                                                                  netfid);
 702                                         CIFSSMBClose(xid, pTcon, netfid);
 703                                 }
 704                         }
 705                         kfree(pinfo_buf);
 706                 }
 707                 if (rc == 0) {
 708                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 709                                             cifs_sb->local_nls,
 710                                             cifs_sb->mnt_cifs_flags &
 711                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 712                         if (!rc) {
 713                                 if (direntry->d_inode)
 714                                         drop_nlink(direntry->d_inode);
 715                         } else if (rc == -ETXTBSY) {
 716                                 int oplock = FALSE;
 717                                 __u16 netfid;
 718
 719                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 720                                                  FILE_OPEN, DELETE,
 721                                                  CREATE_NOT_DIR |
 722                                                  CREATE_DELETE_ON_CLOSE,
 723                                                  &netfid, &oplock, NULL,
 724                                                  cifs_sb->local_nls,
 725                                                  cifs_sb->mnt_cifs_flags &
 726                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 727                                 if (rc == 0) {
 728                                         CIFSSMBRenameOpenFile(xid, pTcon,
 729                                                 netfid, NULL,
 730                                                 cifs_sb->local_nls,
 731                                                 cifs_sb->mnt_cifs_flags &
 732                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 733                                         CIFSSMBClose(xid, pTcon, netfid);
 734                                         if (direntry->d_inode)
 735                                                 drop_nlink(direntry->d_inode);
 736                                 }
 737                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 738                         }
 739                 }
 740         }
 741         if (direntry->d_inode) {
 742                 cifsInode = CIFS_I(direntry->d_inode);
 743                 cifsInode->time = 0;    /* will force revalidate to get info
 744                                            when needed */
 745                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 746         }
 747         if (inode) {
 748                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 749                 cifsInode = CIFS_I(inode);
 750                 cifsInode->time = 0;    /* force revalidate of dir as well */
 751         }
 752
 753         kfree(full_path);
 754         FreeXid(xid);
 755         return rc;
 756 }
 757
 758 static void posix_fill_in_inode(struct inode *tmp_inode,
 759         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 760 {
 761         loff_t local_size;
 762         struct timespec local_mtime;
 763
 764         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 765         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 766
 767         __u32 type = le32_to_cpu(pData->Type);
 768         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 769         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 770         cifsInfo->time = jiffies;
 771         atomic_inc(&cifsInfo->inUse);
 772
 773         /* save mtime and size */
 774         local_mtime = tmp_inode->i_mtime;
 775         local_size  = tmp_inode->i_size;
 776
 777         tmp_inode->i_atime =
 778             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 779         tmp_inode->i_mtime =
 780             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 781         tmp_inode->i_ctime =
 782             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 783
 784         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 785         /* since we set the inode type below we need to mask off type
 786            to avoid strange results if bits above were corrupt */
 787         tmp_inode->i_mode &= ~S_IFMT;
 788         if (type == UNIX_FILE) {
 789                 *pobject_type = DT_REG;
 790                 tmp_inode->i_mode |= S_IFREG;
 791         } else if (type == UNIX_SYMLINK) {
 792                 *pobject_type = DT_LNK;
 793                 tmp_inode->i_mode |= S_IFLNK;
 794         } else if (type == UNIX_DIR) {
 795                 *pobject_type = DT_DIR;
 796                 tmp_inode->i_mode |= S_IFDIR;
 797         } else if (type == UNIX_CHARDEV) {
 798                 *pobject_type = DT_CHR;
 799                 tmp_inode->i_mode |= S_IFCHR;
 800                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 801                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 802         } else if (type == UNIX_BLOCKDEV) {
 803                 *pobject_type = DT_BLK;
 804                 tmp_inode->i_mode |= S_IFBLK;
 805                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 806                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 807         } else if (type == UNIX_FIFO) {
 808                 *pobject_type = DT_FIFO;
 809                 tmp_inode->i_mode |= S_IFIFO;
 810         } else if (type == UNIX_SOCKET) {
 811                 *pobject_type = DT_SOCK;
 812                 tmp_inode->i_mode |= S_IFSOCK;
 813         } else {
 814                 /* safest to just call it a file */
 815                 *pobject_type = DT_REG;
 816                 tmp_inode->i_mode |= S_IFREG;
 817                 cFYI(1, ("unknown inode type %d", type));
 818         }
 819
 820 #ifdef CONFIG_CIFS_DEBUG2
 821         cFYI(1, ("object type: %d", type));
 822 #endif
 823         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 824         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 825         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 826
 827         spin_lock(&tmp_inode->i_lock);
 828         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 829                 /* can not safely change the file size here if the
 830                 client is writing to it due to potential races */
 831                 i_size_write(tmp_inode, end_of_file);
 832
 833         /* 512 bytes (2**9) is the fake blocksize that must be used */
 834         /* for this calculation, not the real blocksize */
 835                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 836         }
 837         spin_unlock(&tmp_inode->i_lock);
 838
 839         if (S_ISREG(tmp_inode->i_mode)) {
 840                 cFYI(1, ("File inode"));
 841                 tmp_inode->i_op = &cifs_file_inode_ops;
 842
 843                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 844                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 845                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 846                         else
 847                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 848
 849                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 850                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 851                 else
 852                         tmp_inode->i_fop = &cifs_file_ops;
 853
 854                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 855                    (cifs_sb->tcon->ses->server->maxBuf <
 856                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 857                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 858                 else
 859                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 860
 861                 if (isNewInode)
 862                         return; /* No sense invalidating pages for new inode
 863                                    since we we have not started caching
 864                                    readahead file data yet */
 865
 866                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 867                         (local_size == tmp_inode->i_size)) {
 868                         cFYI(1, ("inode exists but unchanged"));
 869                 } else {
 870                         /* file may have changed on server */
 871                         cFYI(1, ("invalidate inode, readdir detected change"));
 872                         invalidate_remote_inode(tmp_inode);
 873                 }
 874         } else if (S_ISDIR(tmp_inode->i_mode)) {
 875                 cFYI(1, ("Directory inode"));
 876                 tmp_inode->i_op = &cifs_dir_inode_ops;
 877                 tmp_inode->i_fop = &cifs_dir_ops;
 878         } else if (S_ISLNK(tmp_inode->i_mode)) {
 879                 cFYI(1, ("Symbolic Link inode"));
 880                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 881 /* tmp_inode->i_fop = *//* do not need to set to anything */
 882         } else {
 883                 cFYI(1, ("Special inode"));
 884                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 885                                    tmp_inode->i_rdev);
 886         }
 887 }
 888
 889 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 890 {
 891         int rc = 0;
 892         int xid;
 893         struct cifs_sb_info *cifs_sb;
 894         struct cifsTconInfo *pTcon;
 895         char *full_path = NULL;
 896         struct inode *newinode = NULL;
 897
 898         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 899
 900         xid = GetXid();
 901
 902         cifs_sb = CIFS_SB(inode->i_sb);
 903         pTcon = cifs_sb->tcon;
 904
 905         full_path = build_path_from_dentry(direntry);
 906         if (full_path == NULL) {
 907                 FreeXid(xid);
 908                 return -ENOMEM;
 909         }
 910
 911         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 912                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 913                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 914                 u32 oplock = 0;
 915                 FILE_UNIX_BASIC_INFO * pInfo =
 916                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 917                 if (pInfo == NULL) {
 918                         rc = -ENOMEM;
 919                         goto mkdir_out;
 920                 }
 921
 922                 mode &= ~current->fs->umask;
 923                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 924                                 mode, NULL /* netfid */, pInfo, &oplock,
 925                                 full_path, cifs_sb->local_nls,
 926                                 cifs_sb->mnt_cifs_flags &
 927                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 928                 if (rc) {
 929                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 930                         d_drop(direntry);
 931                 } else {
 932                         int obj_type;
 933                         if (pInfo->Type == -1) /* no return info - go query */ {
 934                                 kfree(pInfo);
 935                                 goto mkdir_get_info;
 936                         }
 937 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 938         to set uid/gid */
 939                         inc_nlink(inode);
 940                         if (pTcon->nocase)
 941                                 direntry->d_op = &cifs_ci_dentry_ops;
 942                         else
 943                                 direntry->d_op = &cifs_dentry_ops;
 944
 945                         newinode = new_inode(inode->i_sb);
 946                         if (newinode == NULL) {
 947                                 kfree(pInfo);
 948                                 goto mkdir_get_info;
 949                         }
 950                         /* Is an i_ino of zero legal? */
 951                         /* Are there sanity checks we can use to ensure that
 952                            the server is really filling in that field? */
 953                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 954                                 newinode->i_ino =
 955                                         (unsigned long)pInfo->UniqueId;
 956                         } /* note ino incremented to unique num in new_inode */
 957                         if (inode->i_sb->s_flags & MS_NOATIME)
 958                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 959                         newinode->i_nlink = 2;
 960
 961                         insert_inode_hash(newinode);
 962                         d_instantiate(direntry, newinode);
 963
 964                         /* we already checked in POSIXCreate whether
 965                            frame was long enough */
 966                         posix_fill_in_inode(direntry->d_inode,
 967                                         pInfo, &obj_type, 1 /* NewInode */);
 968 #ifdef CONFIG_CIFS_DEBUG2
 969                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 970                                 direntry, direntry->d_name.name, newinode));
 971
 972                         if (newinode->i_nlink != 2)
 973                                 cFYI(1, ("unexpected number of links %d",
 974                                         newinode->i_nlink));
 975 #endif
 976                 }
 977                 kfree(pInfo);
 978                 goto mkdir_out;
 979         }
 980
 981         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 982         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 983                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 984         if (rc) {
 985                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 986                 d_drop(direntry);
 987         } else {
 988 mkdir_get_info:
 989                 inc_nlink(inode);
 990                 if (pTcon->unix_ext)
 991                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 992                                                       inode->i_sb, xid);
 993                 else
 994                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 995                                                  inode->i_sb, xid);
 996
 997                 if (pTcon->nocase)
 998                         direntry->d_op = &cifs_ci_dentry_ops;
 999                 else
1000                         direntry->d_op = &cifs_dentry_ops;
1001                 d_instantiate(direntry, newinode);
1002                  /* setting nlink not necessary except in cases where we
1003                   * failed to get it from the server or was set bogus */
1004                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1005                                 direntry->d_inode->i_nlink = 2;
1006                 if (pTcon->unix_ext) {
1007                         mode &= ~current->fs->umask;
1008                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1009                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1010                                                     mode,
1011                                                     (__u64)current->fsuid,
1012                                                     (__u64)current->fsgid,
1013                                                     0 /* dev_t */,
1014                                                     cifs_sb->local_nls,
1015                                                     cifs_sb->mnt_cifs_flags &
1016                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1017                         } else {
1018                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1019                                                     mode, (__u64)-1,
1020                                                     (__u64)-1, 0 /* dev_t */,
1021                                                     cifs_sb->local_nls,
1022                                                     cifs_sb->mnt_cifs_flags &
1023                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1024                         }
1025                 } else {
1026                         /* BB to be implemented via Windows secrty descriptors
1027                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1028                                                  -1, -1, local_nls); */
1029                         if (direntry->d_inode) {
1030                                 direntry->d_inode->i_mode = mode;
1031                                 direntry->d_inode->i_mode |= S_IFDIR;
1032                                 if (cifs_sb->mnt_cifs_flags &
1033                                      CIFS_MOUNT_SET_UID) {
1034                                         direntry->d_inode->i_uid =
1035                                                 current->fsuid;
1036                                         direntry->d_inode->i_gid =
1037                                                 current->fsgid;
1038                                 }
1039                         }
1040                 }
1041         }
1042 mkdir_out:
1043         kfree(full_path);
1044         FreeXid(xid);
1045         return rc;
1046 }
1047
1048 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1049 {
1050         int rc = 0;
1051         int xid;
1052         struct cifs_sb_info *cifs_sb;
1053         struct cifsTconInfo *pTcon;
1054         char *full_path = NULL;
1055         struct cifsInodeInfo *cifsInode;
1056
1057         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1058
1059         xid = GetXid();
1060
1061         cifs_sb = CIFS_SB(inode->i_sb);
1062         pTcon = cifs_sb->tcon;
1063
1064         full_path = build_path_from_dentry(direntry);
1065         if (full_path == NULL) {
1066                 FreeXid(xid);
1067                 return -ENOMEM;
1068         }
1069
1070         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1071                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1072
1073         if (!rc) {
1074                 drop_nlink(inode);
1075                 spin_lock(&direntry->d_inode->i_lock);
1076                 i_size_write(direntry->d_inode, 0);
1077                 clear_nlink(direntry->d_inode);
1078                 spin_unlock(&direntry->d_inode->i_lock);
1079         }
1080
1081         cifsInode = CIFS_I(direntry->d_inode);
1082         cifsInode->time = 0;    /* force revalidate to go get info when
1083                                    needed */
1084         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1085                 current_fs_time(inode->i_sb);
1086
1087         kfree(full_path);
1088         FreeXid(xid);
1089         return rc;
1090 }
1091
1092 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1093         struct inode *target_inode, struct dentry *target_direntry)
1094 {
1095         char *fromName;
1096         char *toName;
1097         struct cifs_sb_info *cifs_sb_source;
1098         struct cifs_sb_info *cifs_sb_target;
1099         struct cifsTconInfo *pTcon;
1100         int xid;
1101         int rc = 0;
1102
1103         xid = GetXid();
1104
1105         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1106         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1107         pTcon = cifs_sb_source->tcon;
1108
1109         if (pTcon != cifs_sb_target->tcon) {
1110                 FreeXid(xid);
1111                 return -EXDEV;  /* BB actually could be allowed if same server,
1112                                    but different share.
1113                                    Might eventually add support for this */
1114         }
1115
1116         /* we already  have the rename sem so we do not need to grab it again
1117            here to protect the path integrity */
1118         fromName = build_path_from_dentry(source_direntry);
1119         toName = build_path_from_dentry(target_direntry);
1120         if ((fromName == NULL) || (toName == NULL)) {
1121                 rc = -ENOMEM;
1122                 goto cifs_rename_exit;
1123         }
1124
1125         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1126                            cifs_sb_source->local_nls,
1127                            cifs_sb_source->mnt_cifs_flags &
1128                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1129         if (rc == -EEXIST) {
1130                 /* check if they are the same file because rename of hardlinked
1131                    files is a noop */
1132                 FILE_UNIX_BASIC_INFO *info_buf_source;
1133                 FILE_UNIX_BASIC_INFO *info_buf_target;
1134
1135                 info_buf_source =
1136                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1137                 if (info_buf_source != NULL) {
1138                         info_buf_target = info_buf_source + 1;
1139                         if (pTcon->unix_ext)
1140                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1141                                         info_buf_source,
1142                                         cifs_sb_source->local_nls,
1143                                         cifs_sb_source->mnt_cifs_flags &
1144                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1145                         /* else rc is still EEXIST so will fall through to
1146                            unlink the target and retry rename */
1147                         if (rc == 0) {
1148                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1149                                                 info_buf_target,
1150                                                 cifs_sb_target->local_nls,
1151                                                 /* remap based on source sb */
1152                                                 cifs_sb_source->mnt_cifs_flags &
1153                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1154                         }
1155                         if ((rc == 0) &&
1156                             (info_buf_source->UniqueId ==
1157                              info_buf_target->UniqueId)) {
1158                         /* do not rename since the files are hardlinked which
1159                            is a noop */
1160                         } else {
1161                         /* we either can not tell the files are hardlinked
1162                            (as with Windows servers) or files are not
1163                            hardlinked so delete the target manually before
1164                            renaming to follow POSIX rather than Windows
1165                            semantics */
1166                                 cifs_unlink(target_inode, target_direntry);
1167                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1168                                                    toName,
1169                                                    cifs_sb_source->local_nls,
1170                                                    cifs_sb_source->mnt_cifs_flags
1171                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1172                         }
1173                         kfree(info_buf_source);
1174                 } /* if we can not get memory just leave rc as EEXIST */
1175         }
1176
1177         if (rc) {
1178                 cFYI(1, ("rename rc %d", rc));
1179         }
1180
1181         if ((rc == -EIO) || (rc == -EEXIST)) {
1182                 int oplock = FALSE;
1183                 __u16 netfid;
1184
1185                 /* BB FIXME Is Generic Read correct for rename? */
1186                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1187                    need to test renaming open directory, also GENERIC_READ
1188                    might not right be right access to request */
1189                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1190                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1191                                  cifs_sb_source->local_nls,
1192                                  cifs_sb_source->mnt_cifs_flags &
1193                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1194                 if (rc == 0) {
1195                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1196                                               cifs_sb_source->local_nls,
1197                                               cifs_sb_source->mnt_cifs_flags &
1198                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1199                         CIFSSMBClose(xid, pTcon, netfid);
1200                 }
1201         }
1202
1203 cifs_rename_exit:
1204         kfree(fromName);
1205         kfree(toName);
1206         FreeXid(xid);
1207         return rc;
1208 }
1209
1210 int cifs_revalidate(struct dentry *direntry)
1211 {
1212         int xid;
1213         int rc = 0;
1214         char *full_path;
1215         struct cifs_sb_info *cifs_sb;
1216         struct cifsInodeInfo *cifsInode;
1217         loff_t local_size;
1218         struct timespec local_mtime;
1219         int invalidate_inode = FALSE;
1220
1221         if (direntry->d_inode == NULL)
1222                 return -ENOENT;
1223
1224         cifsInode = CIFS_I(direntry->d_inode);
1225
1226         if (cifsInode == NULL)
1227                 return -ENOENT;
1228
1229         /* no sense revalidating inode info on file that no one can write */
1230         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1231                 return rc;
1232
1233         xid = GetXid();
1234
1235         cifs_sb = CIFS_SB(direntry->d_sb);
1236
1237         /* can not safely grab the rename sem here if rename calls revalidate
1238            since that would deadlock */
1239         full_path = build_path_from_dentry(direntry);
1240         if (full_path == NULL) {
1241                 FreeXid(xid);
1242                 return -ENOMEM;
1243         }
1244         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1245                  "jiffies %ld", full_path, direntry->d_inode,
1246                  direntry->d_inode->i_count.counter, direntry,
1247                  direntry->d_time, jiffies));
1248
1249         if (cifsInode->time == 0) {
1250                 /* was set to zero previously to force revalidate */
1251         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1252                    lookupCacheEnabled) {
1253                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1254                     (direntry->d_inode->i_nlink == 1)) {
1255                         kfree(full_path);
1256                         FreeXid(xid);
1257                         return rc;
1258                 } else {
1259                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1260                 }
1261         }
1262
1263         /* save mtime and size */
1264         local_mtime = direntry->d_inode->i_mtime;
1265         local_size = direntry->d_inode->i_size;
1266
1267         if (cifs_sb->tcon->unix_ext) {
1268                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1269                                               direntry->d_sb, xid);
1270                 if (rc) {
1271                         cFYI(1, ("error on getting revalidate info %d", rc));
1272 /*                      if (rc != -ENOENT)
1273                                 rc = 0; */      /* BB should we cache info on
1274                                                    certain errors? */
1275                 }
1276         } else {
1277                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1278                                          direntry->d_sb, xid);
1279                 if (rc) {
1280                         cFYI(1, ("error on getting revalidate info %d", rc));
1281 /*                      if (rc != -ENOENT)
1282                                 rc = 0; */      /* BB should we cache info on
1283                                                    certain errors? */
1284                 }
1285         }
1286         /* should we remap certain errors, access denied?, to zero */
1287
1288         /* if not oplocked, we invalidate inode pages if mtime or file size
1289            had changed on server */
1290
1291         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1292             (local_size == direntry->d_inode->i_size)) {
1293                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1294         } else {
1295                 /* file may have changed on server */
1296                 if (cifsInode->clientCanCacheRead) {
1297                         /* no need to invalidate inode pages since we were the
1298                            only ones who could have modified the file and the
1299                            server copy is staler than ours */
1300                 } else {
1301                         invalidate_inode = TRUE;
1302                 }
1303         }
1304
1305         /* can not grab this sem since kernel filesys locking documentation
1306            indicates i_mutex may be taken by the kernel on lookup and rename
1307            which could deadlock if we grab the i_mutex here as well */
1308 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1309         /* need to write out dirty pages here  */
1310         if (direntry->d_inode->i_mapping) {
1311                 /* do we need to lock inode until after invalidate completes
1312                    below? */
1313                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1314         }
1315         if (invalidate_inode) {
1316         /* shrink_dcache not necessary now that cifs dentry ops
1317         are exported for negative dentries */
1318 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1319                         shrink_dcache_parent(direntry); */
1320                 if (S_ISREG(direntry->d_inode->i_mode)) {
1321                         if (direntry->d_inode->i_mapping)
1322                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1323                         /* may eventually have to do this for open files too */
1324                         if (list_empty(&(cifsInode->openFileList))) {
1325                                 /* changed on server - flush read ahead pages */
1326                                 cFYI(1, ("Invalidating read ahead data on "
1327                                          "closed file"));
1328                                 invalidate_remote_inode(direntry->d_inode);
1329                         }
1330                 }
1331         }
1332 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1333
1334         kfree(full_path);
1335         FreeXid(xid);
1336         return rc;
1337 }
1338
1339 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1340         struct kstat *stat)
1341 {
1342         int err = cifs_revalidate(dentry);
1343         if (!err) {
1344                 generic_fillattr(dentry->d_inode, stat);
1345                 stat->blksize = CIFS_MAX_MSGSIZE;
1346         }
1347         return err;
1348 }
1349
1350 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1351 {
1352         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1353         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1354         struct page *page;
1355         int rc = 0;
1356
1357         page = grab_cache_page(mapping, index);
1358         if (!page)
1359                 return -ENOMEM;
1360
1361         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1362         unlock_page(page);
1363         page_cache_release(page);
1364         return rc;
1365 }
1366
1367 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1368 {
1369         struct address_space *mapping = inode->i_mapping;
1370         unsigned long limit;
1371
1372         spin_lock(&inode->i_lock);
1373         if (inode->i_size < offset)
1374                 goto do_expand;
1375         /*
1376          * truncation of in-use swapfiles is disallowed - it would cause
1377          * subsequent swapout to scribble on the now-freed blocks.
1378          */
1379         if (IS_SWAPFILE(inode)) {
1380                 spin_unlock(&inode->i_lock);
1381                 goto out_busy;
1382         }
1383         i_size_write(inode, offset);
1384         spin_unlock(&inode->i_lock);
1385         /*
1386          * unmap_mapping_range is called twice, first simply for efficiency
1387          * so that truncate_inode_pages does fewer single-page unmaps. However
1388          * after this first call, and before truncate_inode_pages finishes,
1389          * it is possible for private pages to be COWed, which remain after
1390          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1391          * call must be made for correctness.
1392          */
1393         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1394         truncate_inode_pages(mapping, offset);
1395         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1396         goto out_truncate;
1397
1398 do_expand:
1399         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1400         if (limit != RLIM_INFINITY && offset > limit) {
1401                 spin_unlock(&inode->i_lock);
1402                 goto out_sig;
1403         }
1404         if (offset > inode->i_sb->s_maxbytes) {
1405                 spin_unlock(&inode->i_lock);
1406                 goto out_big;
1407         }
1408         i_size_write(inode, offset);
1409         spin_unlock(&inode->i_lock);
1410 out_truncate:
1411         if (inode->i_op && inode->i_op->truncate)
1412                 inode->i_op->truncate(inode);
1413         return 0;
1414 out_sig:
1415         send_sig(SIGXFSZ, current, 0);
1416 out_big:
1417         return -EFBIG;
1418 out_busy:
1419         return -ETXTBSY;
1420 }
1421
1422 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1423 {
1424         int xid;
1425         struct cifs_sb_info *cifs_sb;
1426         struct cifsTconInfo *pTcon;
1427         char *full_path = NULL;
1428         int rc = -EACCES;
1429         struct cifsFileInfo *open_file = NULL;
1430         FILE_BASIC_INFO time_buf;
1431         int set_time = FALSE;
1432         int set_dosattr = FALSE;
1433         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1434         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1435         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1436         struct cifsInodeInfo *cifsInode;
1437
1438         xid = GetXid();
1439
1440         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1441                  direntry->d_name.name, attrs->ia_valid));
1442
1443         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1444         pTcon = cifs_sb->tcon;
1445
1446         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1447                 /* check if we have permission to change attrs */
1448                 rc = inode_change_ok(direntry->d_inode, attrs);
1449                 if (rc < 0) {
1450                         FreeXid(xid);
1451                         return rc;
1452                 } else
1453                         rc = 0;
1454         }
1455
1456         full_path = build_path_from_dentry(direntry);
1457         if (full_path == NULL) {
1458                 FreeXid(xid);
1459                 return -ENOMEM;
1460         }
1461         cifsInode = CIFS_I(direntry->d_inode);
1462
1463         /* BB check if we need to refresh inode from server now ? BB */
1464
1465         /* need to flush data before changing file size on server */
1466         filemap_write_and_wait(direntry->d_inode->i_mapping);
1467
1468         if (attrs->ia_valid & ATTR_SIZE) {
1469                 /* To avoid spurious oplock breaks from server, in the case of
1470                    inodes that we already have open, avoid doing path based
1471                    setting of file size if we can do it by handle.
1472                    This keeps our caching token (oplock) and avoids timeouts
1473                    when the local oplock break takes longer to flush
1474                    writebehind data than the SMB timeout for the SetPathInfo
1475                    request would allow */
1476
1477                 open_file = find_writable_file(cifsInode);
1478                 if (open_file) {
1479                         __u16 nfid = open_file->netfid;
1480                         __u32 npid = open_file->pid;
1481                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1482                                                 nfid, npid, FALSE);
1483                         atomic_dec(&open_file->wrtPending);
1484                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1485                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1486                                 unsigned int bytes_written;
1487                                 rc = CIFSSMBWrite(xid, pTcon,
1488                                                   nfid, 0, attrs->ia_size,
1489                                                   &bytes_written, NULL, NULL,
1490                                                   1 /* 45 seconds */);
1491                                 cFYI(1, ("Wrt seteof rc %d", rc));
1492                         }
1493                 } else
1494                         rc = -EINVAL;
1495
1496                 if (rc != 0) {
1497                         /* Set file size by pathname rather than by handle
1498                            either because no valid, writeable file handle for
1499                            it was found or because there was an error setting
1500                            it by handle */
1501                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1502                                            attrs->ia_size, FALSE,
1503                                            cifs_sb->local_nls,
1504                                            cifs_sb->mnt_cifs_flags &
1505                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1506                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1507                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1508                                 __u16 netfid;
1509                                 int oplock = FALSE;
1510
1511                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1512                                         FILE_OPEN,
1513                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1514                                         CREATE_NOT_DIR, &netfid, &oplock,
1515                                         NULL, cifs_sb->local_nls,
1516                                         cifs_sb->mnt_cifs_flags &
1517                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1518                                 if (rc == 0) {
1519                                         unsigned int bytes_written;
1520                                         rc = CIFSSMBWrite(xid, pTcon,
1521                                                         netfid, 0,
1522                                                         attrs->ia_size,
1523                                                         &bytes_written, NULL,
1524                                                         NULL, 1 /* 45 sec */);
1525                                         cFYI(1, ("wrt seteof rc %d", rc));
1526                                         CIFSSMBClose(xid, pTcon, netfid);
1527                                 }
1528
1529                         }
1530                 }
1531
1532                 /* Server is ok setting allocation size implicitly - no need
1533                    to call:
1534                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1535                          cifs_sb->local_nls);
1536                    */
1537
1538                 if (rc == 0) {
1539                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1540                         cifs_truncate_page(direntry->d_inode->i_mapping,
1541                                            direntry->d_inode->i_size);
1542                 } else
1543                         goto cifs_setattr_exit;
1544         }
1545         if (attrs->ia_valid & ATTR_UID) {
1546                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1547                 uid = attrs->ia_uid;
1548         }
1549         if (attrs->ia_valid & ATTR_GID) {
1550                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1551                 gid = attrs->ia_gid;
1552         }
1553
1554         time_buf.Attributes = 0;
1555         if (attrs->ia_valid & ATTR_MODE) {
1556                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1557                 mode = attrs->ia_mode;
1558         }
1559
1560         if ((pTcon->unix_ext)
1561             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1562                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1563                                          0 /* dev_t */, cifs_sb->local_nls,
1564                                          cifs_sb->mnt_cifs_flags &
1565                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1566         else if (attrs->ia_valid & ATTR_MODE) {
1567                 rc = 0;
1568                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1569                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1570                                 set_dosattr = TRUE;
1571                                 time_buf.Attributes =
1572                                         cpu_to_le32(cifsInode->cifsAttrs |
1573                                                     ATTR_READONLY);
1574                         }
1575                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1576                         /* If file is readonly on server, we would
1577                         not be able to write to it - so if any write
1578                         bit is enabled for user or group or other we
1579                         need to at least try to remove r/o dos attr */
1580                         set_dosattr = TRUE;
1581                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1582                                             (~ATTR_READONLY));
1583                         /* Windows ignores set to zero */
1584                         if (time_buf.Attributes == 0)
1585                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1586                 }
1587                 /* BB to be implemented -
1588                    via Windows security descriptors or streams */
1589                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1590                                       cifs_sb->local_nls); */
1591         }
1592
1593         if (attrs->ia_valid & ATTR_ATIME) {
1594                 set_time = TRUE;
1595                 time_buf.LastAccessTime =
1596                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1597         } else
1598                 time_buf.LastAccessTime = 0;
1599
1600         if (attrs->ia_valid & ATTR_MTIME) {
1601                 set_time = TRUE;
1602                 time_buf.LastWriteTime =
1603                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1604         } else
1605                 time_buf.LastWriteTime = 0;
1606         /* Do not set ctime explicitly unless other time
1607            stamps are changed explicitly (i.e. by utime()
1608            since we would then have a mix of client and
1609            server times */
1610
1611         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1612                 set_time = TRUE;
1613                 /* Although Samba throws this field away
1614                 it may be useful to Windows - but we do
1615                 not want to set ctime unless some other
1616                 timestamp is changing */
1617                 cFYI(1, ("CIFS - CTIME changed"));
1618                 time_buf.ChangeTime =
1619                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1620         } else
1621                 time_buf.ChangeTime = 0;
1622
1623         if (set_time || set_dosattr) {
1624                 time_buf.CreationTime = 0;      /* do not change */
1625                 /* In the future we should experiment - try setting timestamps
1626                    via Handle (SetFileInfo) instead of by path */
1627                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1628                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1629                                              cifs_sb->local_nls,
1630                                              cifs_sb->mnt_cifs_flags &
1631                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1632                 else
1633                         rc = -EOPNOTSUPP;
1634
1635                 if (rc == -EOPNOTSUPP) {
1636                         int oplock = FALSE;
1637                         __u16 netfid;
1638
1639                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1640                                  "times not supported by this server"));
1641                         /* BB we could scan to see if we already have it open
1642                            and pass in pid of opener to function */
1643                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1644                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1645                                          CREATE_NOT_DIR, &netfid, &oplock,
1646                                          NULL, cifs_sb->local_nls,
1647                                          cifs_sb->mnt_cifs_flags &
1648                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1649                         if (rc == 0) {
1650                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1651                                                          netfid);
1652                                 CIFSSMBClose(xid, pTcon, netfid);
1653                         } else {
1654                         /* BB For even older servers we could convert time_buf
1655                            into old DOS style which uses two second
1656                            granularity */
1657
1658                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1659                                         &time_buf, cifs_sb->local_nls); */
1660                         }
1661                 }
1662                 /* Even if error on time set, no sense failing the call if
1663                 the server would set the time to a reasonable value anyway,
1664                 and this check ensures that we are not being called from
1665                 sys_utimes in which case we ought to fail the call back to
1666                 the user when the server rejects the call */
1667                 if ((rc) && (attrs->ia_valid &
1668                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1669                         rc = 0;
1670         }
1671
1672         /* do not need local check to inode_check_ok since the server does
1673            that */
1674         if (!rc)
1675                 rc = inode_setattr(direntry->d_inode, attrs);
1676 cifs_setattr_exit:
1677         kfree(full_path);
1678         FreeXid(xid);
1679         return rc;
1680 }
1681
1682 #if 0
1683 void cifs_delete_inode(struct inode *inode)
1684 {
1685         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1686         /* may have to add back in if and when safe distributed caching of
1687            directories added e.g. via FindNotify */
1688 }
1689 #endif