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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_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,
 515                                            le64_to_cpu(pfindData->EndOfFile))) {
 516                         /* can not safely shrink the file size here if the
 517                            client is writing to it due to potential races */
 518                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 519
 520                         /* 512 bytes (2**9) is the fake blocksize that must be
 521                            used for this calculation */
 522                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 523                                            pfindData->AllocationSize)) >> 9;
 524                 }
 525                 spin_unlock(&inode->i_lock);
 526
 527                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 528
 529                 /* BB fill in uid and gid here? with help from winbind?
 530                    or retrieve from NTFS stream extended attribute */
 531 #ifdef CONFIG_CIFS_EXPERIMENTAL
 532                 /* fill in 0777 bits from ACL */
 533                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 534                         cFYI(1, ("Getting mode bits from ACL"));
 535                         acl_to_uid_mode(inode, search_path);
 536                 }
 537 #endif
 538                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 539                         /* fill in remaining high mode bits e.g. SUID, VTX */
 540                         get_sfu_mode(inode, search_path, cifs_sb, xid);
 541                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 542                         inode->i_uid = cifs_sb->mnt_uid;
 543                         inode->i_gid = cifs_sb->mnt_gid;
 544                         /* set so we do not keep refreshing these fields with
 545                            bad data after user has changed them in memory */
 546                         atomic_set(&cifsInfo->inUse, 1);
 547                 }
 548
 549                 if (S_ISREG(inode->i_mode)) {
 550                         cFYI(1, ("File inode"));
 551                         inode->i_op = &cifs_file_inode_ops;
 552                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 553                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 554                                         inode->i_fop =
 555                                                 &cifs_file_direct_nobrl_ops;
 556                                 else
 557                                         inode->i_fop = &cifs_file_direct_ops;
 558                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 559                                 inode->i_fop = &cifs_file_nobrl_ops;
 560                         else /* not direct, send byte range locks */
 561                                 inode->i_fop = &cifs_file_ops;
 562
 563                         if (pTcon->ses->server->maxBuf <
 564                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 565                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 566                         else
 567                                 inode->i_data.a_ops = &cifs_addr_ops;
 568                 } else if (S_ISDIR(inode->i_mode)) {
 569                         cFYI(1, ("Directory inode"));
 570                         inode->i_op = &cifs_dir_inode_ops;
 571                         inode->i_fop = &cifs_dir_ops;
 572                 } else if (S_ISLNK(inode->i_mode)) {
 573                         cFYI(1, ("Symbolic Link inode"));
 574                         inode->i_op = &cifs_symlink_inode_ops;
 575                 } else {
 576                         init_special_inode(inode, inode->i_mode,
 577                                            inode->i_rdev);
 578                 }
 579         }
 580         kfree(buf);
 581         return rc;
 582 }
 583
 584 static const struct inode_operations cifs_ipc_inode_ops = {
 585         .lookup = cifs_lookup,
 586 };
 587
 588 /* gets root inode */
 589 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
 590 {
 591         int xid;
 592         struct cifs_sb_info *cifs_sb;
 593         struct inode *inode;
 594         long rc;
 595
 596         inode = iget_locked(sb, ino);
 597         if (!inode)
 598                 return ERR_PTR(-ENOMEM);
 599         if (!(inode->i_state & I_NEW))
 600                 return inode;
 601
 602         cifs_sb = CIFS_SB(inode->i_sb);
 603         xid = GetXid();
 604
 605         if (cifs_sb->tcon->unix_ext)
 606                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 607         else
 608                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 609         if (rc && cifs_sb->tcon->ipc) {
 610                 cFYI(1, ("ipc connection - fake read inode"));
 611                 inode->i_mode |= S_IFDIR;
 612                 inode->i_nlink = 2;
 613                 inode->i_op = &cifs_ipc_inode_ops;
 614                 inode->i_fop = &simple_dir_operations;
 615                 inode->i_uid = cifs_sb->mnt_uid;
 616                 inode->i_gid = cifs_sb->mnt_gid;
 617                 _FreeXid(xid);
 618                 iget_failed(inode);
 619                 return ERR_PTR(rc);
 620         }
 621
 622         unlock_new_inode(inode);
 623
 624         /* can not call macro FreeXid here since in a void func
 625          * TODO: This is no longer true
 626          */
 627         _FreeXid(xid);
 628         return inode;
 629 }
 630
 631 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 632 {
 633         int rc = 0;
 634         int xid;
 635         struct cifs_sb_info *cifs_sb;
 636         struct cifsTconInfo *pTcon;
 637         char *full_path = NULL;
 638         struct cifsInodeInfo *cifsInode;
 639         FILE_BASIC_INFO *pinfo_buf;
 640
 641         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 642
 643         xid = GetXid();
 644
 645         if (inode)
 646                 cifs_sb = CIFS_SB(inode->i_sb);
 647         else
 648                 cifs_sb = CIFS_SB(direntry->d_sb);
 649         pTcon = cifs_sb->tcon;
 650
 651         /* Unlink can be called from rename so we can not grab the sem here
 652            since we deadlock otherwise */
 653 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 654         full_path = build_path_from_dentry(direntry);
 655 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 656         if (full_path == NULL) {
 657                 FreeXid(xid);
 658                 return -ENOMEM;
 659         }
 660
 661         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 662                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 663                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 664                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 665                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 666                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 667                 cFYI(1, ("posix del rc %d", rc));
 668                 if ((rc == 0) || (rc == -ENOENT))
 669                         goto psx_del_no_retry;
 670         }
 671
 672         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 673                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 674 psx_del_no_retry:
 675         if (!rc) {
 676                 if (direntry->d_inode)
 677                         drop_nlink(direntry->d_inode);
 678         } else if (rc == -ENOENT) {
 679                 d_drop(direntry);
 680         } else if (rc == -ETXTBSY) {
 681                 int oplock = FALSE;
 682                 __u16 netfid;
 683
 684                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 685                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 686                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 687                                  cifs_sb->mnt_cifs_flags &
 688                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 689                 if (rc == 0) {
 690                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 691                                               cifs_sb->local_nls,
 692                                               cifs_sb->mnt_cifs_flags &
 693                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 694                         CIFSSMBClose(xid, pTcon, netfid);
 695                         if (direntry->d_inode)
 696                                 drop_nlink(direntry->d_inode);
 697                 }
 698         } else if (rc == -EACCES) {
 699                 /* try only if r/o attribute set in local lookup data? */
 700                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 701                 if (pinfo_buf) {
 702                         /* ATTRS set to normal clears r/o bit */
 703                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 704                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 705                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 706                                                      pinfo_buf,
 707                                                      cifs_sb->local_nls,
 708                                                      cifs_sb->mnt_cifs_flags &
 709                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 710                         else
 711                                 rc = -EOPNOTSUPP;
 712
 713                         if (rc == -EOPNOTSUPP) {
 714                                 int oplock = FALSE;
 715                                 __u16 netfid;
 716                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 717                                                           full_path,
 718                                                           (__u16)ATTR_NORMAL,
 719                                                           cifs_sb->local_nls);
 720                            For some strange reason it seems that NT4 eats the
 721                            old setattr call without actually setting the
 722                            attributes so on to the third attempted workaround
 723                            */
 724
 725                         /* BB could scan to see if we already have it open
 726                            and pass in pid of opener to function */
 727                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 728                                                  FILE_OPEN, SYNCHRONIZE |
 729                                                  FILE_WRITE_ATTRIBUTES, 0,
 730                                                  &netfid, &oplock, NULL,
 731                                                  cifs_sb->local_nls,
 732                                                  cifs_sb->mnt_cifs_flags &
 733                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 734                                 if (rc == 0) {
 735                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 736                                                                  pinfo_buf,
 737                                                                  netfid);
 738                                         CIFSSMBClose(xid, pTcon, netfid);
 739                                 }
 740                         }
 741                         kfree(pinfo_buf);
 742                 }
 743                 if (rc == 0) {
 744                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 745                                             cifs_sb->local_nls,
 746                                             cifs_sb->mnt_cifs_flags &
 747                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 748                         if (!rc) {
 749                                 if (direntry->d_inode)
 750                                         drop_nlink(direntry->d_inode);
 751                         } else if (rc == -ETXTBSY) {
 752                                 int oplock = FALSE;
 753                                 __u16 netfid;
 754
 755                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 756                                                  FILE_OPEN, DELETE,
 757                                                  CREATE_NOT_DIR |
 758                                                  CREATE_DELETE_ON_CLOSE,
 759                                                  &netfid, &oplock, NULL,
 760                                                  cifs_sb->local_nls,
 761                                                  cifs_sb->mnt_cifs_flags &
 762                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 763                                 if (rc == 0) {
 764                                         CIFSSMBRenameOpenFile(xid, pTcon,
 765                                                 netfid, NULL,
 766                                                 cifs_sb->local_nls,
 767                                                 cifs_sb->mnt_cifs_flags &
 768                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 769                                         CIFSSMBClose(xid, pTcon, netfid);
 770                                         if (direntry->d_inode)
 771                                                 drop_nlink(direntry->d_inode);
 772                                 }
 773                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 774                         }
 775                 }
 776         }
 777         if (direntry->d_inode) {
 778                 cifsInode = CIFS_I(direntry->d_inode);
 779                 cifsInode->time = 0;    /* will force revalidate to get info
 780                                            when needed */
 781                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 782         }
 783         if (inode) {
 784                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 785                 cifsInode = CIFS_I(inode);
 786                 cifsInode->time = 0;    /* force revalidate of dir as well */
 787         }
 788
 789         kfree(full_path);
 790         FreeXid(xid);
 791         return rc;
 792 }
 793
 794 static void posix_fill_in_inode(struct inode *tmp_inode,
 795         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 796 {
 797         loff_t local_size;
 798         struct timespec local_mtime;
 799
 800         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 801         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 802
 803         __u32 type = le32_to_cpu(pData->Type);
 804         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 805         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 806         cifsInfo->time = jiffies;
 807         atomic_inc(&cifsInfo->inUse);
 808
 809         /* save mtime and size */
 810         local_mtime = tmp_inode->i_mtime;
 811         local_size  = tmp_inode->i_size;
 812
 813         tmp_inode->i_atime =
 814             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 815         tmp_inode->i_mtime =
 816             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 817         tmp_inode->i_ctime =
 818             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 819
 820         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 821         /* since we set the inode type below we need to mask off type
 822            to avoid strange results if bits above were corrupt */
 823         tmp_inode->i_mode &= ~S_IFMT;
 824         if (type == UNIX_FILE) {
 825                 *pobject_type = DT_REG;
 826                 tmp_inode->i_mode |= S_IFREG;
 827         } else if (type == UNIX_SYMLINK) {
 828                 *pobject_type = DT_LNK;
 829                 tmp_inode->i_mode |= S_IFLNK;
 830         } else if (type == UNIX_DIR) {
 831                 *pobject_type = DT_DIR;
 832                 tmp_inode->i_mode |= S_IFDIR;
 833         } else if (type == UNIX_CHARDEV) {
 834                 *pobject_type = DT_CHR;
 835                 tmp_inode->i_mode |= S_IFCHR;
 836                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 837                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 838         } else if (type == UNIX_BLOCKDEV) {
 839                 *pobject_type = DT_BLK;
 840                 tmp_inode->i_mode |= S_IFBLK;
 841                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 842                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 843         } else if (type == UNIX_FIFO) {
 844                 *pobject_type = DT_FIFO;
 845                 tmp_inode->i_mode |= S_IFIFO;
 846         } else if (type == UNIX_SOCKET) {
 847                 *pobject_type = DT_SOCK;
 848                 tmp_inode->i_mode |= S_IFSOCK;
 849         } else {
 850                 /* safest to just call it a file */
 851                 *pobject_type = DT_REG;
 852                 tmp_inode->i_mode |= S_IFREG;
 853                 cFYI(1, ("unknown inode type %d", type));
 854         }
 855
 856 #ifdef CONFIG_CIFS_DEBUG2
 857         cFYI(1, ("object type: %d", type));
 858 #endif
 859         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 860         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 861         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 862
 863         spin_lock(&tmp_inode->i_lock);
 864         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 865                 /* can not safely change the file size here if the
 866                 client is writing to it due to potential races */
 867                 i_size_write(tmp_inode, end_of_file);
 868
 869         /* 512 bytes (2**9) is the fake blocksize that must be used */
 870         /* for this calculation, not the real blocksize */
 871                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 872         }
 873         spin_unlock(&tmp_inode->i_lock);
 874
 875         if (S_ISREG(tmp_inode->i_mode)) {
 876                 cFYI(1, ("File inode"));
 877                 tmp_inode->i_op = &cifs_file_inode_ops;
 878
 879                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 880                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 881                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 882                         else
 883                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 884
 885                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 886                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 887                 else
 888                         tmp_inode->i_fop = &cifs_file_ops;
 889
 890                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 891                    (cifs_sb->tcon->ses->server->maxBuf <
 892                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 893                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 894                 else
 895                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 896
 897                 if (isNewInode)
 898                         return; /* No sense invalidating pages for new inode
 899                                    since we we have not started caching
 900                                    readahead file data yet */
 901
 902                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 903                         (local_size == tmp_inode->i_size)) {
 904                         cFYI(1, ("inode exists but unchanged"));
 905                 } else {
 906                         /* file may have changed on server */
 907                         cFYI(1, ("invalidate inode, readdir detected change"));
 908                         invalidate_remote_inode(tmp_inode);
 909                 }
 910         } else if (S_ISDIR(tmp_inode->i_mode)) {
 911                 cFYI(1, ("Directory inode"));
 912                 tmp_inode->i_op = &cifs_dir_inode_ops;
 913                 tmp_inode->i_fop = &cifs_dir_ops;
 914         } else if (S_ISLNK(tmp_inode->i_mode)) {
 915                 cFYI(1, ("Symbolic Link inode"));
 916                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 917 /* tmp_inode->i_fop = *//* do not need to set to anything */
 918         } else {
 919                 cFYI(1, ("Special inode"));
 920                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 921                                    tmp_inode->i_rdev);
 922         }
 923 }
 924
 925 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 926 {
 927         int rc = 0;
 928         int xid;
 929         struct cifs_sb_info *cifs_sb;
 930         struct cifsTconInfo *pTcon;
 931         char *full_path = NULL;
 932         struct inode *newinode = NULL;
 933
 934         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 935
 936         xid = GetXid();
 937
 938         cifs_sb = CIFS_SB(inode->i_sb);
 939         pTcon = cifs_sb->tcon;
 940
 941         full_path = build_path_from_dentry(direntry);
 942         if (full_path == NULL) {
 943                 FreeXid(xid);
 944                 return -ENOMEM;
 945         }
 946
 947         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 948                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 949                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 950                 u32 oplock = 0;
 951                 FILE_UNIX_BASIC_INFO *pInfo =
 952                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 953                 if (pInfo == NULL) {
 954                         rc = -ENOMEM;
 955                         goto mkdir_out;
 956                 }
 957
 958                 mode &= ~current->fs->umask;
 959                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 960                                 mode, NULL /* netfid */, pInfo, &oplock,
 961                                 full_path, cifs_sb->local_nls,
 962                                 cifs_sb->mnt_cifs_flags &
 963                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 964                 if (rc == -EOPNOTSUPP) {
 965                         kfree(pInfo);
 966                         goto mkdir_retry_old;
 967                 } else if (rc) {
 968                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 969                         d_drop(direntry);
 970                 } else {
 971                         int obj_type;
 972                         if (pInfo->Type == cpu_to_le32(-1)) {
 973                                 /* no return info, go query for it */
 974                                 kfree(pInfo);
 975                                 goto mkdir_get_info;
 976                         }
 977 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 978         to set uid/gid */
 979                         inc_nlink(inode);
 980                         if (pTcon->nocase)
 981                                 direntry->d_op = &cifs_ci_dentry_ops;
 982                         else
 983                                 direntry->d_op = &cifs_dentry_ops;
 984
 985                         newinode = new_inode(inode->i_sb);
 986                         if (newinode == NULL) {
 987                                 kfree(pInfo);
 988                                 goto mkdir_get_info;
 989                         }
 990                         /* Is an i_ino of zero legal? */
 991                         /* Are there sanity checks we can use to ensure that
 992                            the server is really filling in that field? */
 993                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 994                                 newinode->i_ino =
 995                                         (unsigned long)pInfo->UniqueId;
 996                         } /* note ino incremented to unique num in new_inode */
 997                         if (inode->i_sb->s_flags & MS_NOATIME)
 998                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 999                         newinode->i_nlink = 2;
1000
1001                         insert_inode_hash(newinode);
1002                         d_instantiate(direntry, newinode);
1003
1004                         /* we already checked in POSIXCreate whether
1005                            frame was long enough */
1006                         posix_fill_in_inode(direntry->d_inode,
1007                                         pInfo, &obj_type, 1 /* NewInode */);
1008 #ifdef CONFIG_CIFS_DEBUG2
1009                         cFYI(1, ("instantiated dentry %p %s to inode %p",
1010                                 direntry, direntry->d_name.name, newinode));
1011
1012                         if (newinode->i_nlink != 2)
1013                                 cFYI(1, ("unexpected number of links %d",
1014                                         newinode->i_nlink));
1015 #endif
1016                 }
1017                 kfree(pInfo);
1018                 goto mkdir_out;
1019         }
1020 mkdir_retry_old:
1021         /* BB add setting the equivalent of mode via CreateX w/ACLs */
1022         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1023                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1024         if (rc) {
1025                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1026                 d_drop(direntry);
1027         } else {
1028 mkdir_get_info:
1029                 inc_nlink(inode);
1030                 if (pTcon->unix_ext)
1031                         rc = cifs_get_inode_info_unix(&newinode, full_path,
1032                                                       inode->i_sb, xid);
1033                 else
1034                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
1035                                                  inode->i_sb, xid);
1036
1037                 if (pTcon->nocase)
1038                         direntry->d_op = &cifs_ci_dentry_ops;
1039                 else
1040                         direntry->d_op = &cifs_dentry_ops;
1041                 d_instantiate(direntry, newinode);
1042                  /* setting nlink not necessary except in cases where we
1043                   * failed to get it from the server or was set bogus */
1044                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1045                                 direntry->d_inode->i_nlink = 2;
1046                 if (pTcon->unix_ext) {
1047                         mode &= ~current->fs->umask;
1048                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1049                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1050                                                     mode,
1051                                                     (__u64)current->fsuid,
1052                                                     (__u64)current->fsgid,
1053                                                     0 /* dev_t */,
1054                                                     cifs_sb->local_nls,
1055                                                     cifs_sb->mnt_cifs_flags &
1056                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1057                         } else {
1058                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1059                                                     mode, (__u64)-1,
1060                                                     (__u64)-1, 0 /* dev_t */,
1061                                                     cifs_sb->local_nls,
1062                                                     cifs_sb->mnt_cifs_flags &
1063                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1064                         }
1065                 } else {
1066                         /* BB to be implemented via Windows secrty descriptors
1067                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1068                                                  -1, -1, local_nls); */
1069                         if (direntry->d_inode) {
1070                                 direntry->d_inode->i_mode = mode;
1071                                 direntry->d_inode->i_mode |= S_IFDIR;
1072                                 if (cifs_sb->mnt_cifs_flags &
1073                                      CIFS_MOUNT_SET_UID) {
1074                                         direntry->d_inode->i_uid =
1075                                                 current->fsuid;
1076                                         direntry->d_inode->i_gid =
1077                                                 current->fsgid;
1078                                 }
1079                         }
1080                 }
1081         }
1082 mkdir_out:
1083         kfree(full_path);
1084         FreeXid(xid);
1085         return rc;
1086 }
1087
1088 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1089 {
1090         int rc = 0;
1091         int xid;
1092         struct cifs_sb_info *cifs_sb;
1093         struct cifsTconInfo *pTcon;
1094         char *full_path = NULL;
1095         struct cifsInodeInfo *cifsInode;
1096
1097         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1098
1099         xid = GetXid();
1100
1101         cifs_sb = CIFS_SB(inode->i_sb);
1102         pTcon = cifs_sb->tcon;
1103
1104         full_path = build_path_from_dentry(direntry);
1105         if (full_path == NULL) {
1106                 FreeXid(xid);
1107                 return -ENOMEM;
1108         }
1109
1110         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1111                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1112
1113         if (!rc) {
1114                 drop_nlink(inode);
1115                 spin_lock(&direntry->d_inode->i_lock);
1116                 i_size_write(direntry->d_inode, 0);
1117                 clear_nlink(direntry->d_inode);
1118                 spin_unlock(&direntry->d_inode->i_lock);
1119         }
1120
1121         cifsInode = CIFS_I(direntry->d_inode);
1122         cifsInode->time = 0;    /* force revalidate to go get info when
1123                                    needed */
1124         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1125                 current_fs_time(inode->i_sb);
1126
1127         kfree(full_path);
1128         FreeXid(xid);
1129         return rc;
1130 }
1131
1132 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1133         struct inode *target_inode, struct dentry *target_direntry)
1134 {
1135         char *fromName;
1136         char *toName;
1137         struct cifs_sb_info *cifs_sb_source;
1138         struct cifs_sb_info *cifs_sb_target;
1139         struct cifsTconInfo *pTcon;
1140         int xid;
1141         int rc = 0;
1142
1143         xid = GetXid();
1144
1145         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1146         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1147         pTcon = cifs_sb_source->tcon;
1148
1149         if (pTcon != cifs_sb_target->tcon) {
1150                 FreeXid(xid);
1151                 return -EXDEV;  /* BB actually could be allowed if same server,
1152                                    but different share.
1153                                    Might eventually add support for this */
1154         }
1155
1156         /* we already  have the rename sem so we do not need to grab it again
1157            here to protect the path integrity */
1158         fromName = build_path_from_dentry(source_direntry);
1159         toName = build_path_from_dentry(target_direntry);
1160         if ((fromName == NULL) || (toName == NULL)) {
1161                 rc = -ENOMEM;
1162                 goto cifs_rename_exit;
1163         }
1164
1165         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1166                            cifs_sb_source->local_nls,
1167                            cifs_sb_source->mnt_cifs_flags &
1168                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1169         if (rc == -EEXIST) {
1170                 /* check if they are the same file because rename of hardlinked
1171                    files is a noop */
1172                 FILE_UNIX_BASIC_INFO *info_buf_source;
1173                 FILE_UNIX_BASIC_INFO *info_buf_target;
1174
1175                 info_buf_source =
1176                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1177                 if (info_buf_source != NULL) {
1178                         info_buf_target = info_buf_source + 1;
1179                         if (pTcon->unix_ext)
1180                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1181                                         info_buf_source,
1182                                         cifs_sb_source->local_nls,
1183                                         cifs_sb_source->mnt_cifs_flags &
1184                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1185                         /* else rc is still EEXIST so will fall through to
1186                            unlink the target and retry rename */
1187                         if (rc == 0) {
1188                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1189                                                 info_buf_target,
1190                                                 cifs_sb_target->local_nls,
1191                                                 /* remap based on source sb */
1192                                                 cifs_sb_source->mnt_cifs_flags &
1193                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1194                         }
1195                         if ((rc == 0) &&
1196                             (info_buf_source->UniqueId ==
1197                              info_buf_target->UniqueId)) {
1198                         /* do not rename since the files are hardlinked which
1199                            is a noop */
1200                         } else {
1201                         /* we either can not tell the files are hardlinked
1202                            (as with Windows servers) or files are not
1203                            hardlinked so delete the target manually before
1204                            renaming to follow POSIX rather than Windows
1205                            semantics */
1206                                 cifs_unlink(target_inode, target_direntry);
1207                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1208                                                    toName,
1209                                                    cifs_sb_source->local_nls,
1210                                                    cifs_sb_source->mnt_cifs_flags
1211                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1212                         }
1213                         kfree(info_buf_source);
1214                 } /* if we can not get memory just leave rc as EEXIST */
1215         }
1216
1217         if (rc) {
1218                 cFYI(1, ("rename rc %d", rc));
1219         }
1220
1221         if ((rc == -EIO) || (rc == -EEXIST)) {
1222                 int oplock = FALSE;
1223                 __u16 netfid;
1224
1225                 /* BB FIXME Is Generic Read correct for rename? */
1226                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1227                    need to test renaming open directory, also GENERIC_READ
1228                    might not right be right access to request */
1229                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1230                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1231                                  cifs_sb_source->local_nls,
1232                                  cifs_sb_source->mnt_cifs_flags &
1233                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1234                 if (rc == 0) {
1235                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1236                                               cifs_sb_source->local_nls,
1237                                               cifs_sb_source->mnt_cifs_flags &
1238                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1239                         CIFSSMBClose(xid, pTcon, netfid);
1240                 }
1241         }
1242
1243 cifs_rename_exit:
1244         kfree(fromName);
1245         kfree(toName);
1246         FreeXid(xid);
1247         return rc;
1248 }
1249
1250 int cifs_revalidate(struct dentry *direntry)
1251 {
1252         int xid;
1253         int rc = 0, wbrc = 0;
1254         char *full_path;
1255         struct cifs_sb_info *cifs_sb;
1256         struct cifsInodeInfo *cifsInode;
1257         loff_t local_size;
1258         struct timespec local_mtime;
1259         int invalidate_inode = FALSE;
1260
1261         if (direntry->d_inode == NULL)
1262                 return -ENOENT;
1263
1264         cifsInode = CIFS_I(direntry->d_inode);
1265
1266         if (cifsInode == NULL)
1267                 return -ENOENT;
1268
1269         /* no sense revalidating inode info on file that no one can write */
1270         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1271                 return rc;
1272
1273         xid = GetXid();
1274
1275         cifs_sb = CIFS_SB(direntry->d_sb);
1276
1277         /* can not safely grab the rename sem here if rename calls revalidate
1278            since that would deadlock */
1279         full_path = build_path_from_dentry(direntry);
1280         if (full_path == NULL) {
1281                 FreeXid(xid);
1282                 return -ENOMEM;
1283         }
1284         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1285                  "jiffies %ld", full_path, direntry->d_inode,
1286                  direntry->d_inode->i_count.counter, direntry,
1287                  direntry->d_time, jiffies));
1288
1289         if (cifsInode->time == 0) {
1290                 /* was set to zero previously to force revalidate */
1291         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1292                    lookupCacheEnabled) {
1293                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1294                     (direntry->d_inode->i_nlink == 1)) {
1295                         kfree(full_path);
1296                         FreeXid(xid);
1297                         return rc;
1298                 } else {
1299                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1300                 }
1301         }
1302
1303         /* save mtime and size */
1304         local_mtime = direntry->d_inode->i_mtime;
1305         local_size = direntry->d_inode->i_size;
1306
1307         if (cifs_sb->tcon->unix_ext) {
1308                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1309                                               direntry->d_sb, xid);
1310                 if (rc) {
1311                         cFYI(1, ("error on getting revalidate info %d", rc));
1312 /*                      if (rc != -ENOENT)
1313                                 rc = 0; */      /* BB should we cache info on
1314                                                    certain errors? */
1315                 }
1316         } else {
1317                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1318                                          direntry->d_sb, xid);
1319                 if (rc) {
1320                         cFYI(1, ("error on getting revalidate info %d", rc));
1321 /*                      if (rc != -ENOENT)
1322                                 rc = 0; */      /* BB should we cache info on
1323                                                    certain errors? */
1324                 }
1325         }
1326         /* should we remap certain errors, access denied?, to zero */
1327
1328         /* if not oplocked, we invalidate inode pages if mtime or file size
1329            had changed on server */
1330
1331         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1332             (local_size == direntry->d_inode->i_size)) {
1333                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1334         } else {
1335                 /* file may have changed on server */
1336                 if (cifsInode->clientCanCacheRead) {
1337                         /* no need to invalidate inode pages since we were the
1338                            only ones who could have modified the file and the
1339                            server copy is staler than ours */
1340                 } else {
1341                         invalidate_inode = TRUE;
1342                 }
1343         }
1344
1345         /* can not grab this sem since kernel filesys locking documentation
1346            indicates i_mutex may be taken by the kernel on lookup and rename
1347            which could deadlock if we grab the i_mutex here as well */
1348 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1349         /* need to write out dirty pages here  */
1350         if (direntry->d_inode->i_mapping) {
1351                 /* do we need to lock inode until after invalidate completes
1352                    below? */
1353                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1354                 if (wbrc)
1355                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1356         }
1357         if (invalidate_inode) {
1358         /* shrink_dcache not necessary now that cifs dentry ops
1359         are exported for negative dentries */
1360 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1361                         shrink_dcache_parent(direntry); */
1362                 if (S_ISREG(direntry->d_inode->i_mode)) {
1363                         if (direntry->d_inode->i_mapping)
1364                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1365                                 if (wbrc)
1366                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1367                         /* may eventually have to do this for open files too */
1368                         if (list_empty(&(cifsInode->openFileList))) {
1369                                 /* changed on server - flush read ahead pages */
1370                                 cFYI(1, ("Invalidating read ahead data on "
1371                                          "closed file"));
1372                                 invalidate_remote_inode(direntry->d_inode);
1373                         }
1374                 }
1375         }
1376 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1377
1378         kfree(full_path);
1379         FreeXid(xid);
1380         return rc;
1381 }
1382
1383 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1384         struct kstat *stat)
1385 {
1386         int err = cifs_revalidate(dentry);
1387         if (!err) {
1388                 generic_fillattr(dentry->d_inode, stat);
1389                 stat->blksize = CIFS_MAX_MSGSIZE;
1390         }
1391         return err;
1392 }
1393
1394 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1395 {
1396         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1397         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1398         struct page *page;
1399         int rc = 0;
1400
1401         page = grab_cache_page(mapping, index);
1402         if (!page)
1403                 return -ENOMEM;
1404
1405         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1406         unlock_page(page);
1407         page_cache_release(page);
1408         return rc;
1409 }
1410
1411 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1412 {
1413         struct address_space *mapping = inode->i_mapping;
1414         unsigned long limit;
1415
1416         spin_lock(&inode->i_lock);
1417         if (inode->i_size < offset)
1418                 goto do_expand;
1419         /*
1420          * truncation of in-use swapfiles is disallowed - it would cause
1421          * subsequent swapout to scribble on the now-freed blocks.
1422          */
1423         if (IS_SWAPFILE(inode)) {
1424                 spin_unlock(&inode->i_lock);
1425                 goto out_busy;
1426         }
1427         i_size_write(inode, offset);
1428         spin_unlock(&inode->i_lock);
1429         /*
1430          * unmap_mapping_range is called twice, first simply for efficiency
1431          * so that truncate_inode_pages does fewer single-page unmaps. However
1432          * after this first call, and before truncate_inode_pages finishes,
1433          * it is possible for private pages to be COWed, which remain after
1434          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1435          * call must be made for correctness.
1436          */
1437         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1438         truncate_inode_pages(mapping, offset);
1439         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1440         goto out_truncate;
1441
1442 do_expand:
1443         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1444         if (limit != RLIM_INFINITY && offset > limit) {
1445                 spin_unlock(&inode->i_lock);
1446                 goto out_sig;
1447         }
1448         if (offset > inode->i_sb->s_maxbytes) {
1449                 spin_unlock(&inode->i_lock);
1450                 goto out_big;
1451         }
1452         i_size_write(inode, offset);
1453         spin_unlock(&inode->i_lock);
1454 out_truncate:
1455         if (inode->i_op && inode->i_op->truncate)
1456                 inode->i_op->truncate(inode);
1457         return 0;
1458 out_sig:
1459         send_sig(SIGXFSZ, current, 0);
1460 out_big:
1461         return -EFBIG;
1462 out_busy:
1463         return -ETXTBSY;
1464 }
1465
1466 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1467 {
1468         int xid;
1469         struct cifs_sb_info *cifs_sb;
1470         struct cifsTconInfo *pTcon;
1471         char *full_path = NULL;
1472         int rc = -EACCES;
1473         struct cifsFileInfo *open_file = NULL;
1474         FILE_BASIC_INFO time_buf;
1475         int set_time = FALSE;
1476         int set_dosattr = FALSE;
1477         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1478         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1479         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1480         struct cifsInodeInfo *cifsInode;
1481
1482         xid = GetXid();
1483
1484         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1485                  direntry->d_name.name, attrs->ia_valid));
1486
1487         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1488         pTcon = cifs_sb->tcon;
1489
1490         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1491                 /* check if we have permission to change attrs */
1492                 rc = inode_change_ok(direntry->d_inode, attrs);
1493                 if (rc < 0) {
1494                         FreeXid(xid);
1495                         return rc;
1496                 } else
1497                         rc = 0;
1498         }
1499
1500         full_path = build_path_from_dentry(direntry);
1501         if (full_path == NULL) {
1502                 FreeXid(xid);
1503                 return -ENOMEM;
1504         }
1505         cifsInode = CIFS_I(direntry->d_inode);
1506
1507         /* BB check if we need to refresh inode from server now ? BB */
1508
1509         if (attrs->ia_valid & ATTR_SIZE) {
1510                 /*
1511                    Flush data before changing file size on server. If the
1512                    flush returns error, store it to report later and continue.
1513                    BB: This should be smarter. Why bother flushing pages that
1514                    will be truncated anyway? Also, should we error out here if
1515                    the flush returns error?
1516                  */
1517                 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1518                 if (rc != 0) {
1519                         CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1520                         rc = 0;
1521                 }
1522
1523                 /* To avoid spurious oplock breaks from server, in the case of
1524                    inodes that we already have open, avoid doing path based
1525                    setting of file size if we can do it by handle.
1526                    This keeps our caching token (oplock) and avoids timeouts
1527                    when the local oplock break takes longer to flush
1528                    writebehind data than the SMB timeout for the SetPathInfo
1529                    request would allow */
1530
1531                 open_file = find_writable_file(cifsInode);
1532                 if (open_file) {
1533                         __u16 nfid = open_file->netfid;
1534                         __u32 npid = open_file->pid;
1535                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1536                                                 nfid, npid, FALSE);
1537                         atomic_dec(&open_file->wrtPending);
1538                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1539                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1540                                 unsigned int bytes_written;
1541                                 rc = CIFSSMBWrite(xid, pTcon,
1542                                                   nfid, 0, attrs->ia_size,
1543                                                   &bytes_written, NULL, NULL,
1544                                                   1 /* 45 seconds */);
1545                                 cFYI(1, ("Wrt seteof rc %d", rc));
1546                         }
1547                 } else
1548                         rc = -EINVAL;
1549
1550                 if (rc != 0) {
1551                         /* Set file size by pathname rather than by handle
1552                            either because no valid, writeable file handle for
1553                            it was found or because there was an error setting
1554                            it by handle */
1555                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1556                                            attrs->ia_size, FALSE,
1557                                            cifs_sb->local_nls,
1558                                            cifs_sb->mnt_cifs_flags &
1559                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1560                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1561                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1562                                 __u16 netfid;
1563                                 int oplock = FALSE;
1564
1565                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1566                                         FILE_OPEN,
1567                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1568                                         CREATE_NOT_DIR, &netfid, &oplock,
1569                                         NULL, cifs_sb->local_nls,
1570                                         cifs_sb->mnt_cifs_flags &
1571                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1572                                 if (rc == 0) {
1573                                         unsigned int bytes_written;
1574                                         rc = CIFSSMBWrite(xid, pTcon,
1575                                                         netfid, 0,
1576                                                         attrs->ia_size,
1577                                                         &bytes_written, NULL,
1578                                                         NULL, 1 /* 45 sec */);
1579                                         cFYI(1, ("wrt seteof rc %d", rc));
1580                                         CIFSSMBClose(xid, pTcon, netfid);
1581                                 }
1582
1583                         }
1584                 }
1585
1586                 /* Server is ok setting allocation size implicitly - no need
1587                    to call:
1588                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1589                          cifs_sb->local_nls);
1590                    */
1591
1592                 if (rc == 0) {
1593                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1594                         cifs_truncate_page(direntry->d_inode->i_mapping,
1595                                            direntry->d_inode->i_size);
1596                 } else
1597                         goto cifs_setattr_exit;
1598         }
1599         if (attrs->ia_valid & ATTR_UID) {
1600                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1601                 uid = attrs->ia_uid;
1602         }
1603         if (attrs->ia_valid & ATTR_GID) {
1604                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1605                 gid = attrs->ia_gid;
1606         }
1607
1608         time_buf.Attributes = 0;
1609
1610         /* skip mode change if it's just for clearing setuid/setgid */
1611         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1612                 attrs->ia_valid &= ~ATTR_MODE;
1613
1614         if (attrs->ia_valid & ATTR_MODE) {
1615                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1616                 mode = attrs->ia_mode;
1617         }
1618
1619         if ((pTcon->unix_ext)
1620             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1621                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1622                                          0 /* dev_t */, cifs_sb->local_nls,
1623                                          cifs_sb->mnt_cifs_flags &
1624                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1625         else if (attrs->ia_valid & ATTR_MODE) {
1626                 rc = 0;
1627 #ifdef CONFIG_CIFS_EXPERIMENTAL
1628                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1629                         rc = mode_to_acl(direntry->d_inode, full_path, mode);
1630                 else if ((mode & S_IWUGO) == 0) {
1631 #else
1632                 if ((mode & S_IWUGO) == 0) {
1633 #endif
1634                         /* not writeable */
1635                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1636                                 set_dosattr = TRUE;
1637                                 time_buf.Attributes =
1638                                         cpu_to_le32(cifsInode->cifsAttrs |
1639                                                     ATTR_READONLY);
1640                         }
1641                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1642                         /* If file is readonly on server, we would
1643                         not be able to write to it - so if any write
1644                         bit is enabled for user or group or other we
1645                         need to at least try to remove r/o dos attr */
1646                         set_dosattr = TRUE;
1647                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1648                                             (~ATTR_READONLY));
1649                         /* Windows ignores set to zero */
1650                         if (time_buf.Attributes == 0)
1651                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1652                 }
1653 #ifdef CONFIG_CIFS_EXPERIMENTAL
1654                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1655                         mode_to_acl(direntry->d_inode, full_path, mode);
1656 #endif
1657         }
1658
1659         if (attrs->ia_valid & ATTR_ATIME) {
1660                 set_time = TRUE;
1661                 time_buf.LastAccessTime =
1662                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1663         } else
1664                 time_buf.LastAccessTime = 0;
1665
1666         if (attrs->ia_valid & ATTR_MTIME) {
1667                 set_time = TRUE;
1668                 time_buf.LastWriteTime =
1669                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1670         } else
1671                 time_buf.LastWriteTime = 0;
1672         /* Do not set ctime explicitly unless other time
1673            stamps are changed explicitly (i.e. by utime()
1674            since we would then have a mix of client and
1675            server times */
1676
1677         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1678                 set_time = TRUE;
1679                 /* Although Samba throws this field away
1680                 it may be useful to Windows - but we do
1681                 not want to set ctime unless some other
1682                 timestamp is changing */
1683                 cFYI(1, ("CIFS - CTIME changed"));
1684                 time_buf.ChangeTime =
1685                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1686         } else
1687                 time_buf.ChangeTime = 0;
1688
1689         if (set_time || set_dosattr) {
1690                 time_buf.CreationTime = 0;      /* do not change */
1691                 /* In the future we should experiment - try setting timestamps
1692                    via Handle (SetFileInfo) instead of by path */
1693                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1694                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1695                                              cifs_sb->local_nls,
1696                                              cifs_sb->mnt_cifs_flags &
1697                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1698                 else
1699                         rc = -EOPNOTSUPP;
1700
1701                 if (rc == -EOPNOTSUPP) {
1702                         int oplock = FALSE;
1703                         __u16 netfid;
1704
1705                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1706                                  "times not supported by this server"));
1707                         /* BB we could scan to see if we already have it open
1708                            and pass in pid of opener to function */
1709                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1710                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1711                                          CREATE_NOT_DIR, &netfid, &oplock,
1712                                          NULL, cifs_sb->local_nls,
1713                                          cifs_sb->mnt_cifs_flags &
1714                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1715                         if (rc == 0) {
1716                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1717                                                          netfid);
1718                                 CIFSSMBClose(xid, pTcon, netfid);
1719                         } else {
1720                         /* BB For even older servers we could convert time_buf
1721                            into old DOS style which uses two second
1722                            granularity */
1723
1724                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1725                                         &time_buf, cifs_sb->local_nls); */
1726                         }
1727                 }
1728                 /* Even if error on time set, no sense failing the call if
1729                 the server would set the time to a reasonable value anyway,
1730                 and this check ensures that we are not being called from
1731                 sys_utimes in which case we ought to fail the call back to
1732                 the user when the server rejects the call */
1733                 if ((rc) && (attrs->ia_valid &
1734                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1735                         rc = 0;
1736         }
1737
1738         /* do not need local check to inode_check_ok since the server does
1739            that */
1740         if (!rc)
1741                 rc = inode_setattr(direntry->d_inode, attrs);
1742 cifs_setattr_exit:
1743         kfree(full_path);
1744         FreeXid(xid);
1745         return rc;
1746 }
1747
1748 #if 0
1749 void cifs_delete_inode(struct inode *inode)
1750 {
1751         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1752         /* may have to add back in if and when safe distributed caching of
1753            directories added e.g. via FindNotify */
1754 }
1755 #endif