fs/cifs/inode.c

   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32 int cifs_get_inode_info_unix(struct inode **pinode,
  33         const unsigned char *search_path, struct super_block *sb, int xid)
  34 {
  35         int rc = 0;
  36         FILE_UNIX_BASIC_INFO findData;
  37         struct cifsTconInfo *pTcon;
  38         struct inode *inode;
  39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  40         char *tmp_path;
  41
  42         pTcon = cifs_sb->tcon;
  43         cFYI(1, ("Getting info on %s", search_path));
  44         /* could have done a find first instead but this returns more info */
  45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  49                  sizeof(findData)); */
  50         if (rc) {
  51                 if (rc == -EREMOTE) {
  52                         tmp_path =
  53                             kmalloc(strnlen(pTcon->treeName,
  54                                             MAX_TREE_SIZE + 1) +
  55                                     strnlen(search_path, MAX_PATHCONF) + 1,
  56                                     GFP_KERNEL);
  57                         if (tmp_path == NULL) {
  58                                 return -ENOMEM;
  59                         }
  60                         /* have to skip first of the double backslash of
  61                            UNC name */
  62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  63                         strncat(tmp_path, search_path, MAX_PATHCONF);
  64                         rc = connect_to_dfs_path(xid, pTcon->ses,
  65                                                  /* treename + */ tmp_path,
  66                                                  cifs_sb->local_nls,
  67                                                  cifs_sb->mnt_cifs_flags &
  68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  69                         kfree(tmp_path);
  70
  71                         /* BB fix up inode etc. */
  72                 } else if (rc) {
  73                         return rc;
  74                 }
  75         } else {
  76                 struct cifsInodeInfo *cifsInfo;
  77                 __u32 type = le32_to_cpu(findData.Type);
  78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  80
  81                 /* get new inode */
  82                 if (*pinode == NULL) {
  83                         *pinode = new_inode(sb);
  84                         if (*pinode == NULL)
  85                                 return -ENOMEM;
  86                         /* Is an i_ino of zero legal? */
  87                         /* Are there sanity checks we can use to ensure that
  88                            the server is really filling in that field? */
  89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  90                                 (*pinode)->i_ino =
  91                                         (unsigned long)findData.UniqueId;
  92                         } /* note ino incremented to unique num in new_inode */
  93                         if (sb->s_flags & MS_NOATIME)
  94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
  95
  96                         insert_inode_hash(*pinode);
  97                 }
  98
  99                 inode = *pinode;
 100                 cifsInfo = CIFS_I(inode);
 101
 102                 cFYI(1, ("Old time %ld", cifsInfo->time));
 103                 cifsInfo->time = jiffies;
 104                 cFYI(1, ("New time %ld", cifsInfo->time));
 105                 /* this is ok to set on every inode revalidate */
 106                 atomic_set(&cifsInfo->inUse, 1);
 107
 108                 inode->i_atime =
 109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 110                 inode->i_mtime =
 111                     cifs_NTtimeToUnix(le64_to_cpu
 112                                 (findData.LastModificationTime));
 113                 inode->i_ctime =
 114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 115                 inode->i_mode = le64_to_cpu(findData.Permissions);
 116                 /* since we set the inode type below we need to mask off
 117                    to avoid strange results if bits set above */
 118                         inode->i_mode &= ~S_IFMT;
 119                 if (type == UNIX_FILE) {
 120                         inode->i_mode |= S_IFREG;
 121                 } else if (type == UNIX_SYMLINK) {
 122                         inode->i_mode |= S_IFLNK;
 123                 } else if (type == UNIX_DIR) {
 124                         inode->i_mode |= S_IFDIR;
 125                 } else if (type == UNIX_CHARDEV) {
 126                         inode->i_mode |= S_IFCHR;
 127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 129                 } else if (type == UNIX_BLOCKDEV) {
 130                         inode->i_mode |= S_IFBLK;
 131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 133                 } else if (type == UNIX_FIFO) {
 134                         inode->i_mode |= S_IFIFO;
 135                 } else if (type == UNIX_SOCKET) {
 136                         inode->i_mode |= S_IFSOCK;
 137                 } else {
 138                         /* safest to call it a file if we do not know */
 139                         inode->i_mode |= S_IFREG;
 140                         cFYI(1, ("unknown type %d", type));
 141                 }
 142
 143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 144                         inode->i_uid = cifs_sb->mnt_uid;
 145                 else
 146                         inode->i_uid = le64_to_cpu(findData.Uid);
 147
 148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 149                         inode->i_gid = cifs_sb->mnt_gid;
 150                 else
 151                         inode->i_gid = le64_to_cpu(findData.Gid);
 152
 153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 154
 155                 spin_lock(&inode->i_lock);
 156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 157                 /* can not safely change the file size here if the
 158                    client is writing to it due to potential races */
 159                         i_size_write(inode, end_of_file);
 160
 161                 /* blksize needs to be multiple of two. So safer to default to
 162                 blksize and blkbits set in superblock so 2**blkbits and blksize
 163                 will match rather than setting to:
 164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 165
 166                 /* This seems incredibly stupid but it turns out that i_blocks
 167                    is not related to (i_size / i_blksize), instead 512 byte size
 168                    is required for calculating num blocks */
 169
 170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 171                 /* for this calculation */
 172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 173                 }
 174                 spin_unlock(&inode->i_lock);
 175
 176                 if (num_of_bytes < end_of_file)
 177                         cFYI(1, ("allocation size less than end of file"));
 178                 cFYI(1, ("Size %ld and blocks %llu",
 179                         (unsigned long) inode->i_size,
 180                         (unsigned long long)inode->i_blocks));
 181                 if (S_ISREG(inode->i_mode)) {
 182                         cFYI(1, ("File inode"));
 183                         inode->i_op = &cifs_file_inode_ops;
 184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 186                                         inode->i_fop =
 187                                                 &cifs_file_direct_nobrl_ops;
 188                                 else
 189                                         inode->i_fop = &cifs_file_direct_ops;
 190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 191                                 inode->i_fop = &cifs_file_nobrl_ops;
 192                         else /* not direct, send byte range locks */
 193                                 inode->i_fop = &cifs_file_ops;
 194
 195                         /* check if server can support readpages */
 196                         if (pTcon->ses->server->maxBuf <
 197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 199                         else
 200                                 inode->i_data.a_ops = &cifs_addr_ops;
 201                 } else if (S_ISDIR(inode->i_mode)) {
 202                         cFYI(1, ("Directory inode"));
 203                         inode->i_op = &cifs_dir_inode_ops;
 204                         inode->i_fop = &cifs_dir_ops;
 205                 } else if (S_ISLNK(inode->i_mode)) {
 206                         cFYI(1, ("Symbolic Link inode"));
 207                         inode->i_op = &cifs_symlink_inode_ops;
 208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 209                 } else {
 210                         cFYI(1, ("Init special inode"));
 211                         init_special_inode(inode, inode->i_mode,
 212                                            inode->i_rdev);
 213                 }
 214         }
 215         return rc;
 216 }
 217
 218 static int decode_sfu_inode(struct inode *inode, __u64 size,
 219                             const unsigned char *path,
 220                             struct cifs_sb_info *cifs_sb, int xid)
 221 {
 222         int rc;
 223         int oplock = FALSE;
 224         __u16 netfid;
 225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 226         char buf[24];
 227         unsigned int bytes_read;
 228         char *pbuf;
 229
 230         pbuf = buf;
 231
 232         if (size == 0) {
 233                 inode->i_mode |= S_IFIFO;
 234                 return 0;
 235         } else if (size < 8) {
 236                 return -EINVAL;  /* EOPNOTSUPP? */
 237         }
 238
 239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 241                          cifs_sb->local_nls,
 242                          cifs_sb->mnt_cifs_flags &
 243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 244         if (rc == 0) {
 245                 int buf_type = CIFS_NO_BUFFER;
 246                         /* Read header */
 247                 rc = CIFSSMBRead(xid, pTcon,
 248                                  netfid,
 249                                  24 /* length */, 0 /* offset */,
 250                                  &bytes_read, &pbuf, &buf_type);
 251                 if ((rc == 0) && (bytes_read >= 8)) {
 252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 253                                 cFYI(1, ("Block device"));
 254                                 inode->i_mode |= S_IFBLK;
 255                                 if (bytes_read == 24) {
 256                                         /* we have enough to decode dev num */
 257                                         __u64 mjr; /* major */
 258                                         __u64 mnr; /* minor */
 259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 261                                         inode->i_rdev = MKDEV(mjr, mnr);
 262                                 }
 263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 264                                 cFYI(1, ("Char device"));
 265                                 inode->i_mode |= S_IFCHR;
 266                                 if (bytes_read == 24) {
 267                                         /* we have enough to decode dev num */
 268                                         __u64 mjr; /* major */
 269                                         __u64 mnr; /* minor */
 270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 272                                         inode->i_rdev = MKDEV(mjr, mnr);
 273                                 }
 274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 275                                 cFYI(1, ("Symlink"));
 276                                 inode->i_mode |= S_IFLNK;
 277                         } else {
 278                                 inode->i_mode |= S_IFREG; /* file? */
 279                                 rc = -EOPNOTSUPP;
 280                         }
 281                 } else {
 282                         inode->i_mode |= S_IFREG; /* then it is a file */
 283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 284                 }
 285                 CIFSSMBClose(xid, pTcon, netfid);
 286         }
 287         return rc;
 288 }
 289
 290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 291
 292 static int get_sfu_uid_mode(struct inode *inode,
 293                         const unsigned char *path,
 294                         struct cifs_sb_info *cifs_sb, int xid)
 295 {
 296 #ifdef CONFIG_CIFS_XATTR
 297         ssize_t rc;
 298         char ea_value[4];
 299         __u32 mode;
 300
 301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 304         if (rc < 0)
 305                 return (int)rc;
 306         else if (rc > 3) {
 307                 mode = le32_to_cpu(*((__le32 *)ea_value));
 308                 inode->i_mode &= ~SFBITS_MASK;
 309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 311                 cFYI(1, ("special mode bits 0%o", mode));
 312                 return 0;
 313         } else {
 314                 return 0;
 315         }
 316 #else
 317         return -EOPNOTSUPP;
 318 #endif
 319 }
 320
 321 int cifs_get_inode_info(struct inode **pinode,
 322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 323         struct super_block *sb, int xid)
 324 {
 325         int rc = 0;
 326         struct cifsTconInfo *pTcon;
 327         struct inode *inode;
 328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 329         char *tmp_path;
 330         char *buf = NULL;
 331         int adjustTZ = FALSE;
 332
 333         pTcon = cifs_sb->tcon;
 334         cFYI(1, ("Getting info on %s", search_path));
 335
 336         if ((pfindData == NULL) && (*pinode != NULL)) {
 337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 338                         cFYI(1, ("No need to revalidate cached inode sizes"));
 339                         return rc;
 340                 }
 341         }
 342
 343         /* if file info not passed in then get it from server */
 344         if (pfindData == NULL) {
 345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 346                 if (buf == NULL)
 347                         return -ENOMEM;
 348                 pfindData = (FILE_ALL_INFO *)buf;
 349                 /* could do find first instead but this returns more info */
 350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 351                               0 /* not legacy */,
 352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 354                 /* BB optimize code so we do not make the above call
 355                 when server claims no NT SMB support and the above call
 356                 failed at least once - set flag in tcon or mount */
 357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 358                         rc = SMBQueryInformation(xid, pTcon, search_path,
 359                                         pfindData, cifs_sb->local_nls,
 360                                         cifs_sb->mnt_cifs_flags &
 361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 362                         adjustTZ = TRUE;
 363                 }
 364         }
 365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 366         if (rc) {
 367                 if (rc == -EREMOTE) {
 368                         tmp_path =
 369                             kmalloc(strnlen
 370                                     (pTcon->treeName,
 371                                      MAX_TREE_SIZE + 1) +
 372                                     strnlen(search_path, MAX_PATHCONF) + 1,
 373                                     GFP_KERNEL);
 374                         if (tmp_path == NULL) {
 375                                 kfree(buf);
 376                                 return -ENOMEM;
 377                         }
 378
 379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 380                         strncat(tmp_path, search_path, MAX_PATHCONF);
 381                         rc = connect_to_dfs_path(xid, pTcon->ses,
 382                                                  /* treename + */ tmp_path,
 383                                                  cifs_sb->local_nls,
 384                                                  cifs_sb->mnt_cifs_flags &
 385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 386                         kfree(tmp_path);
 387                         /* BB fix up inode etc. */
 388                 } else if (rc) {
 389                         kfree(buf);
 390                         return rc;
 391                 }
 392         } else {
 393                 struct cifsInodeInfo *cifsInfo;
 394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 395
 396                 /* get new inode */
 397                 if (*pinode == NULL) {
 398                         *pinode = new_inode(sb);
 399                         if (*pinode == NULL) {
 400                                 kfree(buf);
 401                                 return -ENOMEM;
 402                         }
 403                         /* Is an i_ino of zero legal? Can we use that to check
 404                            if the server supports returning inode numbers?  Are
 405                            there other sanity checks we can use to ensure that
 406                            the server is really filling in that field? */
 407
 408                         /* We can not use the IndexNumber field by default from
 409                            Windows or Samba (in ALL_INFO buf) but we can request
 410                            it explicitly.  It may not be unique presumably if
 411                            the server has multiple devices mounted under one
 412                            share */
 413
 414                         /* There may be higher info levels that work but are
 415                            there Windows server or network appliances for which
 416                            IndexNumber field is not guaranteed unique? */
 417
 418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 419                                 int rc1 = 0;
 420                                 __u64 inode_num;
 421
 422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 423                                         search_path, &inode_num,
 424                                         cifs_sb->local_nls,
 425                                         cifs_sb->mnt_cifs_flags &
 426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 427                                 if (rc1) {
 428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 430                                 } else /* do we need cast or hash to ino? */
 431                                         (*pinode)->i_ino = inode_num;
 432                         } /* else ino incremented to unique num in new_inode*/
 433                         if (sb->s_flags & MS_NOATIME)
 434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 435                         insert_inode_hash(*pinode);
 436                 }
 437                 inode = *pinode;
 438                 cifsInfo = CIFS_I(inode);
 439                 cifsInfo->cifsAttrs = attr;
 440                 cFYI(1, ("Old time %ld", cifsInfo->time));
 441                 cifsInfo->time = jiffies;
 442                 cFYI(1, ("New time %ld", cifsInfo->time));
 443
 444                 /* blksize needs to be multiple of two. So safer to default to
 445                 blksize and blkbits set in superblock so 2**blkbits and blksize
 446                 will match rather than setting to:
 447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 448
 449                 /* Linux can not store file creation time so ignore it */
 450                 if (pfindData->LastAccessTime)
 451                         inode->i_atime = cifs_NTtimeToUnix
 452                                 (le64_to_cpu(pfindData->LastAccessTime));
 453                 else /* do not need to use current_fs_time - time not stored */
 454                         inode->i_atime = CURRENT_TIME;
 455                 inode->i_mtime =
 456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 457                 inode->i_ctime =
 458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 459                 cFYI(0, ("Attributes came in as 0x%x", attr));
 460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 463                 }
 464
 465                 /* set default mode. will override for dirs below */
 466                 if (atomic_read(&cifsInfo->inUse) == 0)
 467                         /* new inode, can safely set these fields */
 468                         inode->i_mode = cifs_sb->mnt_file_mode;
 469                 else /* since we set the inode type below we need to mask off
 470                      to avoid strange results if type changes and both
 471                      get orred in */
 472                         inode->i_mode &= ~S_IFMT;
 473 /*              if (attr & ATTR_REPARSE)  */
 474                 /* We no longer handle these as symlinks because we could not
 475                    follow them due to the absolute path with drive letter */
 476                 if (attr & ATTR_DIRECTORY) {
 477                 /* override default perms since we do not do byte range locking
 478                    on dirs */
 479                         inode->i_mode = cifs_sb->mnt_dir_mode;
 480                         inode->i_mode |= S_IFDIR;
 481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 483                            /* No need to le64 convert size of zero */
 484                            (pfindData->EndOfFile == 0)) {
 485                         inode->i_mode = cifs_sb->mnt_file_mode;
 486                         inode->i_mode |= S_IFIFO;
 487 /* BB Finish for SFU style symlinks and devices */
 488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 490                         if (decode_sfu_inode(inode,
 491                                          le64_to_cpu(pfindData->EndOfFile),
 492                                          search_path,
 493                                          cifs_sb, xid)) {
 494                                 cFYI(1, ("Unrecognized sfu inode type"));
 495                         }
 496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
 497                 } else {
 498                         inode->i_mode |= S_IFREG;
 499                         /* treat the dos attribute of read-only as read-only
 500                            mode e.g. 555 */
 501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 502                                 inode->i_mode &= ~(S_IWUGO);
 503                         else if ((inode->i_mode & S_IWUGO) == 0)
 504                                 /* the ATTR_READONLY flag may have been */
 505                                 /* changed on server -- set any w bits  */
 506                                 /* allowed by mnt_file_mode             */
 507                                 inode->i_mode |= (S_IWUGO &
 508                                                   cifs_sb->mnt_file_mode);
 509                 /* BB add code here -
 510                    validate if device or weird share or device type? */
 511                 }
 512
 513                 spin_lock(&inode->i_lock);
 514                 if (is_size_safe_to_change(cifsInfo, le64_to_cpu(pfindData->EndOfFile))) {
 515                         /* can not safely shrink the file size here if the
 516                            client is writing to it due to potential races */
 517                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 518
 519                         /* 512 bytes (2**9) is the fake blocksize that must be
 520                            used for this calculation */
 521                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 522                                            pfindData->AllocationSize)) >> 9;
 523                 }
 524                 spin_unlock(&inode->i_lock);
 525
 526                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 527
 528                 /* BB fill in uid and gid here? with help from winbind?
 529                    or retrieve from NTFS stream extended attribute */
 530                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 531                         /* fill in uid, gid, mode from server ACL */
 532                         /* BB FIXME this should also take into account the
 533                          * default uid specified on mount if present */
 534                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
 535                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 536                         inode->i_uid = cifs_sb->mnt_uid;
 537                         inode->i_gid = cifs_sb->mnt_gid;
 538                         /* set so we do not keep refreshing these fields with
 539                            bad data after user has changed them in memory */
 540                         atomic_set(&cifsInfo->inUse, 1);
 541                 }
 542
 543                 if (S_ISREG(inode->i_mode)) {
 544                         cFYI(1, ("File inode"));
 545                         inode->i_op = &cifs_file_inode_ops;
 546                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 547                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 548                                         inode->i_fop =
 549                                                 &cifs_file_direct_nobrl_ops;
 550                                 else
 551                                         inode->i_fop = &cifs_file_direct_ops;
 552                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 553                                 inode->i_fop = &cifs_file_nobrl_ops;
 554                         else /* not direct, send byte range locks */
 555                                 inode->i_fop = &cifs_file_ops;
 556
 557                         if (pTcon->ses->server->maxBuf <
 558                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 559                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 560                         else
 561                                 inode->i_data.a_ops = &cifs_addr_ops;
 562                 } else if (S_ISDIR(inode->i_mode)) {
 563                         cFYI(1, ("Directory inode"));
 564                         inode->i_op = &cifs_dir_inode_ops;
 565                         inode->i_fop = &cifs_dir_ops;
 566                 } else if (S_ISLNK(inode->i_mode)) {
 567                         cFYI(1, ("Symbolic Link inode"));
 568                         inode->i_op = &cifs_symlink_inode_ops;
 569                 } else {
 570                         init_special_inode(inode, inode->i_mode,
 571                                            inode->i_rdev);
 572                 }
 573         }
 574         kfree(buf);
 575         return rc;
 576 }
 577
 578 /* gets root inode */
 579 void cifs_read_inode(struct inode *inode)
 580 {
 581         int xid;
 582         struct cifs_sb_info *cifs_sb;
 583
 584         cifs_sb = CIFS_SB(inode->i_sb);
 585         xid = GetXid();
 586
 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 == -EOPNOTSUPP) {
 929                         kfree(pInfo);
 930                         goto mkdir_retry_old;
 931                 } else if (rc) {
 932                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 933                         d_drop(direntry);
 934                 } else {
 935                         int obj_type;
 936                         if (pInfo->Type == -1) /* no return info - go query */ {
 937                                 kfree(pInfo);
 938                                 goto mkdir_get_info;
 939                         }
 940 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 941         to set uid/gid */
 942                         inc_nlink(inode);
 943                         if (pTcon->nocase)
 944                                 direntry->d_op = &cifs_ci_dentry_ops;
 945                         else
 946                                 direntry->d_op = &cifs_dentry_ops;
 947
 948                         newinode = new_inode(inode->i_sb);
 949                         if (newinode == NULL) {
 950                                 kfree(pInfo);
 951                                 goto mkdir_get_info;
 952                         }
 953                         /* Is an i_ino of zero legal? */
 954                         /* Are there sanity checks we can use to ensure that
 955                            the server is really filling in that field? */
 956                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 957                                 newinode->i_ino =
 958                                         (unsigned long)pInfo->UniqueId;
 959                         } /* note ino incremented to unique num in new_inode */
 960                         if (inode->i_sb->s_flags & MS_NOATIME)
 961                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 962                         newinode->i_nlink = 2;
 963
 964                         insert_inode_hash(newinode);
 965                         d_instantiate(direntry, newinode);
 966
 967                         /* we already checked in POSIXCreate whether
 968                            frame was long enough */
 969                         posix_fill_in_inode(direntry->d_inode,
 970                                         pInfo, &obj_type, 1 /* NewInode */);
 971 #ifdef CONFIG_CIFS_DEBUG2
 972                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 973                                 direntry, direntry->d_name.name, newinode));
 974
 975                         if (newinode->i_nlink != 2)
 976                                 cFYI(1, ("unexpected number of links %d",
 977                                         newinode->i_nlink));
 978 #endif
 979                 }
 980                 kfree(pInfo);
 981                 goto mkdir_out;
 982         }
 983 mkdir_retry_old:
 984         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 985         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 986                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 987         if (rc) {
 988                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 989                 d_drop(direntry);
 990         } else {
 991 mkdir_get_info:
 992                 inc_nlink(inode);
 993                 if (pTcon->unix_ext)
 994                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 995                                                       inode->i_sb, xid);
 996                 else
 997                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 998                                                  inode->i_sb, xid);
 999
1000                 if (pTcon->nocase)
1001                         direntry->d_op = &cifs_ci_dentry_ops;
1002                 else
1003                         direntry->d_op = &cifs_dentry_ops;
1004                 d_instantiate(direntry, newinode);
1005                  /* setting nlink not necessary except in cases where we
1006                   * failed to get it from the server or was set bogus */
1007                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1008                                 direntry->d_inode->i_nlink = 2;
1009                 if (pTcon->unix_ext) {
1010                         mode &= ~current->fs->umask;
1011                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1012                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1013                                                     mode,
1014                                                     (__u64)current->fsuid,
1015                                                     (__u64)current->fsgid,
1016                                                     0 /* dev_t */,
1017                                                     cifs_sb->local_nls,
1018                                                     cifs_sb->mnt_cifs_flags &
1019                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1020                         } else {
1021                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1022                                                     mode, (__u64)-1,
1023                                                     (__u64)-1, 0 /* dev_t */,
1024                                                     cifs_sb->local_nls,
1025                                                     cifs_sb->mnt_cifs_flags &
1026                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1027                         }
1028                 } else {
1029                         /* BB to be implemented via Windows secrty descriptors
1030                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1031                                                  -1, -1, local_nls); */
1032                         if (direntry->d_inode) {
1033                                 direntry->d_inode->i_mode = mode;
1034                                 direntry->d_inode->i_mode |= S_IFDIR;
1035                                 if (cifs_sb->mnt_cifs_flags &
1036                                      CIFS_MOUNT_SET_UID) {
1037                                         direntry->d_inode->i_uid =
1038                                                 current->fsuid;
1039                                         direntry->d_inode->i_gid =
1040                                                 current->fsgid;
1041                                 }
1042                         }
1043                 }
1044         }
1045 mkdir_out:
1046         kfree(full_path);
1047         FreeXid(xid);
1048         return rc;
1049 }
1050
1051 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1052 {
1053         int rc = 0;
1054         int xid;
1055         struct cifs_sb_info *cifs_sb;
1056         struct cifsTconInfo *pTcon;
1057         char *full_path = NULL;
1058         struct cifsInodeInfo *cifsInode;
1059
1060         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1061
1062         xid = GetXid();
1063
1064         cifs_sb = CIFS_SB(inode->i_sb);
1065         pTcon = cifs_sb->tcon;
1066
1067         full_path = build_path_from_dentry(direntry);
1068         if (full_path == NULL) {
1069                 FreeXid(xid);
1070                 return -ENOMEM;
1071         }
1072
1073         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1074                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1075
1076         if (!rc) {
1077                 drop_nlink(inode);
1078                 spin_lock(&direntry->d_inode->i_lock);
1079                 i_size_write(direntry->d_inode, 0);
1080                 clear_nlink(direntry->d_inode);
1081                 spin_unlock(&direntry->d_inode->i_lock);
1082         }
1083
1084         cifsInode = CIFS_I(direntry->d_inode);
1085         cifsInode->time = 0;    /* force revalidate to go get info when
1086                                    needed */
1087         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1088                 current_fs_time(inode->i_sb);
1089
1090         kfree(full_path);
1091         FreeXid(xid);
1092         return rc;
1093 }
1094
1095 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1096         struct inode *target_inode, struct dentry *target_direntry)
1097 {
1098         char *fromName;
1099         char *toName;
1100         struct cifs_sb_info *cifs_sb_source;
1101         struct cifs_sb_info *cifs_sb_target;
1102         struct cifsTconInfo *pTcon;
1103         int xid;
1104         int rc = 0;
1105
1106         xid = GetXid();
1107
1108         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1109         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1110         pTcon = cifs_sb_source->tcon;
1111
1112         if (pTcon != cifs_sb_target->tcon) {
1113                 FreeXid(xid);
1114                 return -EXDEV;  /* BB actually could be allowed if same server,
1115                                    but different share.
1116                                    Might eventually add support for this */
1117         }
1118
1119         /* we already  have the rename sem so we do not need to grab it again
1120            here to protect the path integrity */
1121         fromName = build_path_from_dentry(source_direntry);
1122         toName = build_path_from_dentry(target_direntry);
1123         if ((fromName == NULL) || (toName == NULL)) {
1124                 rc = -ENOMEM;
1125                 goto cifs_rename_exit;
1126         }
1127
1128         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1129                            cifs_sb_source->local_nls,
1130                            cifs_sb_source->mnt_cifs_flags &
1131                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1132         if (rc == -EEXIST) {
1133                 /* check if they are the same file because rename of hardlinked
1134                    files is a noop */
1135                 FILE_UNIX_BASIC_INFO *info_buf_source;
1136                 FILE_UNIX_BASIC_INFO *info_buf_target;
1137
1138                 info_buf_source =
1139                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1140                 if (info_buf_source != NULL) {
1141                         info_buf_target = info_buf_source + 1;
1142                         if (pTcon->unix_ext)
1143                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1144                                         info_buf_source,
1145                                         cifs_sb_source->local_nls,
1146                                         cifs_sb_source->mnt_cifs_flags &
1147                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1148                         /* else rc is still EEXIST so will fall through to
1149                            unlink the target and retry rename */
1150                         if (rc == 0) {
1151                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1152                                                 info_buf_target,
1153                                                 cifs_sb_target->local_nls,
1154                                                 /* remap based on source sb */
1155                                                 cifs_sb_source->mnt_cifs_flags &
1156                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1157                         }
1158                         if ((rc == 0) &&
1159                             (info_buf_source->UniqueId ==
1160                              info_buf_target->UniqueId)) {
1161                         /* do not rename since the files are hardlinked which
1162                            is a noop */
1163                         } else {
1164                         /* we either can not tell the files are hardlinked
1165                            (as with Windows servers) or files are not
1166                            hardlinked so delete the target manually before
1167                            renaming to follow POSIX rather than Windows
1168                            semantics */
1169                                 cifs_unlink(target_inode, target_direntry);
1170                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1171                                                    toName,
1172                                                    cifs_sb_source->local_nls,
1173                                                    cifs_sb_source->mnt_cifs_flags
1174                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1175                         }
1176                         kfree(info_buf_source);
1177                 } /* if we can not get memory just leave rc as EEXIST */
1178         }
1179
1180         if (rc) {
1181                 cFYI(1, ("rename rc %d", rc));
1182         }
1183
1184         if ((rc == -EIO) || (rc == -EEXIST)) {
1185                 int oplock = FALSE;
1186                 __u16 netfid;
1187
1188                 /* BB FIXME Is Generic Read correct for rename? */
1189                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1190                    need to test renaming open directory, also GENERIC_READ
1191                    might not right be right access to request */
1192                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1193                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1194                                  cifs_sb_source->local_nls,
1195                                  cifs_sb_source->mnt_cifs_flags &
1196                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1197                 if (rc == 0) {
1198                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1199                                               cifs_sb_source->local_nls,
1200                                               cifs_sb_source->mnt_cifs_flags &
1201                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1202                         CIFSSMBClose(xid, pTcon, netfid);
1203                 }
1204         }
1205
1206 cifs_rename_exit:
1207         kfree(fromName);
1208         kfree(toName);
1209         FreeXid(xid);
1210         return rc;
1211 }
1212
1213 int cifs_revalidate(struct dentry *direntry)
1214 {
1215         int xid;
1216         int rc = 0;
1217         char *full_path;
1218         struct cifs_sb_info *cifs_sb;
1219         struct cifsInodeInfo *cifsInode;
1220         loff_t local_size;
1221         struct timespec local_mtime;
1222         int invalidate_inode = FALSE;
1223
1224         if (direntry->d_inode == NULL)
1225                 return -ENOENT;
1226
1227         cifsInode = CIFS_I(direntry->d_inode);
1228
1229         if (cifsInode == NULL)
1230                 return -ENOENT;
1231
1232         /* no sense revalidating inode info on file that no one can write */
1233         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1234                 return rc;
1235
1236         xid = GetXid();
1237
1238         cifs_sb = CIFS_SB(direntry->d_sb);
1239
1240         /* can not safely grab the rename sem here if rename calls revalidate
1241            since that would deadlock */
1242         full_path = build_path_from_dentry(direntry);
1243         if (full_path == NULL) {
1244                 FreeXid(xid);
1245                 return -ENOMEM;
1246         }
1247         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1248                  "jiffies %ld", full_path, direntry->d_inode,
1249                  direntry->d_inode->i_count.counter, direntry,
1250                  direntry->d_time, jiffies));
1251
1252         if (cifsInode->time == 0) {
1253                 /* was set to zero previously to force revalidate */
1254         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1255                    lookupCacheEnabled) {
1256                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1257                     (direntry->d_inode->i_nlink == 1)) {
1258                         kfree(full_path);
1259                         FreeXid(xid);
1260                         return rc;
1261                 } else {
1262                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1263                 }
1264         }
1265
1266         /* save mtime and size */
1267         local_mtime = direntry->d_inode->i_mtime;
1268         local_size = direntry->d_inode->i_size;
1269
1270         if (cifs_sb->tcon->unix_ext) {
1271                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
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         } else {
1280                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1281                                          direntry->d_sb, xid);
1282                 if (rc) {
1283                         cFYI(1, ("error on getting revalidate info %d", rc));
1284 /*                      if (rc != -ENOENT)
1285                                 rc = 0; */      /* BB should we cache info on
1286                                                    certain errors? */
1287                 }
1288         }
1289         /* should we remap certain errors, access denied?, to zero */
1290
1291         /* if not oplocked, we invalidate inode pages if mtime or file size
1292            had changed on server */
1293
1294         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1295             (local_size == direntry->d_inode->i_size)) {
1296                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1297         } else {
1298                 /* file may have changed on server */
1299                 if (cifsInode->clientCanCacheRead) {
1300                         /* no need to invalidate inode pages since we were the
1301                            only ones who could have modified the file and the
1302                            server copy is staler than ours */
1303                 } else {
1304                         invalidate_inode = TRUE;
1305                 }
1306         }
1307
1308         /* can not grab this sem since kernel filesys locking documentation
1309            indicates i_mutex may be taken by the kernel on lookup and rename
1310            which could deadlock if we grab the i_mutex here as well */
1311 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1312         /* need to write out dirty pages here  */
1313         if (direntry->d_inode->i_mapping) {
1314                 /* do we need to lock inode until after invalidate completes
1315                    below? */
1316                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1317         }
1318         if (invalidate_inode) {
1319         /* shrink_dcache not necessary now that cifs dentry ops
1320         are exported for negative dentries */
1321 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1322                         shrink_dcache_parent(direntry); */
1323                 if (S_ISREG(direntry->d_inode->i_mode)) {
1324                         if (direntry->d_inode->i_mapping)
1325                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1326                         /* may eventually have to do this for open files too */
1327                         if (list_empty(&(cifsInode->openFileList))) {
1328                                 /* changed on server - flush read ahead pages */
1329                                 cFYI(1, ("Invalidating read ahead data on "
1330                                          "closed file"));
1331                                 invalidate_remote_inode(direntry->d_inode);
1332                         }
1333                 }
1334         }
1335 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1336
1337         kfree(full_path);
1338         FreeXid(xid);
1339         return rc;
1340 }
1341
1342 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1343         struct kstat *stat)
1344 {
1345         int err = cifs_revalidate(dentry);
1346         if (!err) {
1347                 generic_fillattr(dentry->d_inode, stat);
1348                 stat->blksize = CIFS_MAX_MSGSIZE;
1349         }
1350         return err;
1351 }
1352
1353 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1354 {
1355         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1356         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1357         struct page *page;
1358         int rc = 0;
1359
1360         page = grab_cache_page(mapping, index);
1361         if (!page)
1362                 return -ENOMEM;
1363
1364         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1365         unlock_page(page);
1366         page_cache_release(page);
1367         return rc;
1368 }
1369
1370 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1371 {
1372         struct address_space *mapping = inode->i_mapping;
1373         unsigned long limit;
1374
1375         spin_lock(&inode->i_lock);
1376         if (inode->i_size < offset)
1377                 goto do_expand;
1378         /*
1379          * truncation of in-use swapfiles is disallowed - it would cause
1380          * subsequent swapout to scribble on the now-freed blocks.
1381          */
1382         if (IS_SWAPFILE(inode)) {
1383                 spin_unlock(&inode->i_lock);
1384                 goto out_busy;
1385         }
1386         i_size_write(inode, offset);
1387         spin_unlock(&inode->i_lock);
1388         /*
1389          * unmap_mapping_range is called twice, first simply for efficiency
1390          * so that truncate_inode_pages does fewer single-page unmaps. However
1391          * after this first call, and before truncate_inode_pages finishes,
1392          * it is possible for private pages to be COWed, which remain after
1393          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1394          * call must be made for correctness.
1395          */
1396         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1397         truncate_inode_pages(mapping, offset);
1398         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1399         goto out_truncate;
1400
1401 do_expand:
1402         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1403         if (limit != RLIM_INFINITY && offset > limit) {
1404                 spin_unlock(&inode->i_lock);
1405                 goto out_sig;
1406         }
1407         if (offset > inode->i_sb->s_maxbytes) {
1408                 spin_unlock(&inode->i_lock);
1409                 goto out_big;
1410         }
1411         i_size_write(inode, offset);
1412         spin_unlock(&inode->i_lock);
1413 out_truncate:
1414         if (inode->i_op && inode->i_op->truncate)
1415                 inode->i_op->truncate(inode);
1416         return 0;
1417 out_sig:
1418         send_sig(SIGXFSZ, current, 0);
1419 out_big:
1420         return -EFBIG;
1421 out_busy:
1422         return -ETXTBSY;
1423 }
1424
1425 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1426 {
1427         int xid;
1428         struct cifs_sb_info *cifs_sb;
1429         struct cifsTconInfo *pTcon;
1430         char *full_path = NULL;
1431         int rc = -EACCES;
1432         struct cifsFileInfo *open_file = NULL;
1433         FILE_BASIC_INFO time_buf;
1434         int set_time = FALSE;
1435         int set_dosattr = FALSE;
1436         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1437         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1438         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1439         struct cifsInodeInfo *cifsInode;
1440
1441         xid = GetXid();
1442
1443         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1444                  direntry->d_name.name, attrs->ia_valid));
1445
1446         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1447         pTcon = cifs_sb->tcon;
1448
1449         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1450                 /* check if we have permission to change attrs */
1451                 rc = inode_change_ok(direntry->d_inode, attrs);
1452                 if (rc < 0) {
1453                         FreeXid(xid);
1454                         return rc;
1455                 } else
1456                         rc = 0;
1457         }
1458
1459         full_path = build_path_from_dentry(direntry);
1460         if (full_path == NULL) {
1461                 FreeXid(xid);
1462                 return -ENOMEM;
1463         }
1464         cifsInode = CIFS_I(direntry->d_inode);
1465
1466         /* BB check if we need to refresh inode from server now ? BB */
1467
1468         /* need to flush data before changing file size on server */
1469         filemap_write_and_wait(direntry->d_inode->i_mapping);
1470
1471         if (attrs->ia_valid & ATTR_SIZE) {
1472                 /* To avoid spurious oplock breaks from server, in the case of
1473                    inodes that we already have open, avoid doing path based
1474                    setting of file size if we can do it by handle.
1475                    This keeps our caching token (oplock) and avoids timeouts
1476                    when the local oplock break takes longer to flush
1477                    writebehind data than the SMB timeout for the SetPathInfo
1478                    request would allow */
1479
1480                 open_file = find_writable_file(cifsInode);
1481                 if (open_file) {
1482                         __u16 nfid = open_file->netfid;
1483                         __u32 npid = open_file->pid;
1484                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1485                                                 nfid, npid, FALSE);
1486                         atomic_dec(&open_file->wrtPending);
1487                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1488                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1489                                 unsigned int bytes_written;
1490                                 rc = CIFSSMBWrite(xid, pTcon,
1491                                                   nfid, 0, attrs->ia_size,
1492                                                   &bytes_written, NULL, NULL,
1493                                                   1 /* 45 seconds */);
1494                                 cFYI(1, ("Wrt seteof rc %d", rc));
1495                         }
1496                 } else
1497                         rc = -EINVAL;
1498
1499                 if (rc != 0) {
1500                         /* Set file size by pathname rather than by handle
1501                            either because no valid, writeable file handle for
1502                            it was found or because there was an error setting
1503                            it by handle */
1504                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1505                                            attrs->ia_size, FALSE,
1506                                            cifs_sb->local_nls,
1507                                            cifs_sb->mnt_cifs_flags &
1508                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1509                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1510                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1511                                 __u16 netfid;
1512                                 int oplock = FALSE;
1513
1514                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1515                                         FILE_OPEN,
1516                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1517                                         CREATE_NOT_DIR, &netfid, &oplock,
1518                                         NULL, cifs_sb->local_nls,
1519                                         cifs_sb->mnt_cifs_flags &
1520                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1521                                 if (rc == 0) {
1522                                         unsigned int bytes_written;
1523                                         rc = CIFSSMBWrite(xid, pTcon,
1524                                                         netfid, 0,
1525                                                         attrs->ia_size,
1526                                                         &bytes_written, NULL,
1527                                                         NULL, 1 /* 45 sec */);
1528                                         cFYI(1, ("wrt seteof rc %d", rc));
1529                                         CIFSSMBClose(xid, pTcon, netfid);
1530                                 }
1531
1532                         }
1533                 }
1534
1535                 /* Server is ok setting allocation size implicitly - no need
1536                    to call:
1537                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1538                          cifs_sb->local_nls);
1539                    */
1540
1541                 if (rc == 0) {
1542                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1543                         cifs_truncate_page(direntry->d_inode->i_mapping,
1544                                            direntry->d_inode->i_size);
1545                 } else
1546                         goto cifs_setattr_exit;
1547         }
1548         if (attrs->ia_valid & ATTR_UID) {
1549                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1550                 uid = attrs->ia_uid;
1551         }
1552         if (attrs->ia_valid & ATTR_GID) {
1553                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1554                 gid = attrs->ia_gid;
1555         }
1556
1557         time_buf.Attributes = 0;
1558         if (attrs->ia_valid & ATTR_MODE) {
1559                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1560                 mode = attrs->ia_mode;
1561         }
1562
1563         if ((pTcon->unix_ext)
1564             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1565                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1566                                          0 /* dev_t */, cifs_sb->local_nls,
1567                                          cifs_sb->mnt_cifs_flags &
1568                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1569         else if (attrs->ia_valid & ATTR_MODE) {
1570                 rc = 0;
1571                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1572                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1573                                 set_dosattr = TRUE;
1574                                 time_buf.Attributes =
1575                                         cpu_to_le32(cifsInode->cifsAttrs |
1576                                                     ATTR_READONLY);
1577                         }
1578                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1579                         /* If file is readonly on server, we would
1580                         not be able to write to it - so if any write
1581                         bit is enabled for user or group or other we
1582                         need to at least try to remove r/o dos attr */
1583                         set_dosattr = TRUE;
1584                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1585                                             (~ATTR_READONLY));
1586                         /* Windows ignores set to zero */
1587                         if (time_buf.Attributes == 0)
1588                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1589                 }
1590                 /* BB to be implemented -
1591                    via Windows security descriptors or streams */
1592                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1593                                       cifs_sb->local_nls); */
1594         }
1595
1596         if (attrs->ia_valid & ATTR_ATIME) {
1597                 set_time = TRUE;
1598                 time_buf.LastAccessTime =
1599                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1600         } else
1601                 time_buf.LastAccessTime = 0;
1602
1603         if (attrs->ia_valid & ATTR_MTIME) {
1604                 set_time = TRUE;
1605                 time_buf.LastWriteTime =
1606                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1607         } else
1608                 time_buf.LastWriteTime = 0;
1609         /* Do not set ctime explicitly unless other time
1610            stamps are changed explicitly (i.e. by utime()
1611            since we would then have a mix of client and
1612            server times */
1613
1614         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1615                 set_time = TRUE;
1616                 /* Although Samba throws this field away
1617                 it may be useful to Windows - but we do
1618                 not want to set ctime unless some other
1619                 timestamp is changing */
1620                 cFYI(1, ("CIFS - CTIME changed"));
1621                 time_buf.ChangeTime =
1622                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1623         } else
1624                 time_buf.ChangeTime = 0;
1625
1626         if (set_time || set_dosattr) {
1627                 time_buf.CreationTime = 0;      /* do not change */
1628                 /* In the future we should experiment - try setting timestamps
1629                    via Handle (SetFileInfo) instead of by path */
1630                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1631                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1632                                              cifs_sb->local_nls,
1633                                              cifs_sb->mnt_cifs_flags &
1634                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1635                 else
1636                         rc = -EOPNOTSUPP;
1637
1638                 if (rc == -EOPNOTSUPP) {
1639                         int oplock = FALSE;
1640                         __u16 netfid;
1641
1642                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1643                                  "times not supported by this server"));
1644                         /* BB we could scan to see if we already have it open
1645                            and pass in pid of opener to function */
1646                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1647                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1648                                          CREATE_NOT_DIR, &netfid, &oplock,
1649                                          NULL, cifs_sb->local_nls,
1650                                          cifs_sb->mnt_cifs_flags &
1651                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1652                         if (rc == 0) {
1653                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1654                                                          netfid);
1655                                 CIFSSMBClose(xid, pTcon, netfid);
1656                         } else {
1657                         /* BB For even older servers we could convert time_buf
1658                            into old DOS style which uses two second
1659                            granularity */
1660
1661                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1662                                         &time_buf, cifs_sb->local_nls); */
1663                         }
1664                 }
1665                 /* Even if error on time set, no sense failing the call if
1666                 the server would set the time to a reasonable value anyway,
1667                 and this check ensures that we are not being called from
1668                 sys_utimes in which case we ought to fail the call back to
1669                 the user when the server rejects the call */
1670                 if ((rc) && (attrs->ia_valid &
1671                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1672                         rc = 0;
1673         }
1674
1675         /* do not need local check to inode_check_ok since the server does
1676            that */
1677         if (!rc)
1678                 rc = inode_setattr(direntry->d_inode, attrs);
1679 cifs_setattr_exit:
1680         kfree(full_path);
1681         FreeXid(xid);
1682         return rc;
1683 }
1684
1685 #if 0
1686 void cifs_delete_inode(struct inode *inode)
1687 {
1688         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1689         /* may have to add back in if and when safe distributed caching of
1690            directories added e.g. via FindNotify */
1691 }
1692 #endif