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