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                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 991                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 992                                                     mode,
 993                                                     (__u64)current->fsuid,
 994                                                     (__u64)current->fsgid,
 995                                                     0 /* dev_t */,
 996                                                     cifs_sb->local_nls,
 997                                                     cifs_sb->mnt_cifs_flags &
 998                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 999                         } else {
1000                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1001                                                     mode, (__u64)-1,
1002                                                     (__u64)-1, 0 /* dev_t */,
1003                                                     cifs_sb->local_nls,
1004                                                     cifs_sb->mnt_cifs_flags &
1005                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1006                         }
1007                 else {
1008                         /* BB to be implemented via Windows secrty descriptors
1009                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1010                                                  -1, -1, local_nls); */
1011                         if(direntry->d_inode) {
1012                                 direntry->d_inode->i_mode = mode;
1013                                 direntry->d_inode->i_mode |= S_IFDIR;
1014                                 if(cifs_sb->mnt_cifs_flags &
1015                                      CIFS_MOUNT_SET_UID) {
1016                                         direntry->d_inode->i_uid =
1017                                                 current->fsuid;
1018                                         direntry->d_inode->i_gid =
1019                                                 current->fsgid;
1020                                 }
1021                         }
1022                 }
1023         }
1024 mkdir_out:
1025         kfree(full_path);
1026         FreeXid(xid);
1027         return rc;
1028 }
1029
1030 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1031 {
1032         int rc = 0;
1033         int xid;
1034         struct cifs_sb_info *cifs_sb;
1035         struct cifsTconInfo *pTcon;
1036         char *full_path = NULL;
1037         struct cifsInodeInfo *cifsInode;
1038
1039         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1040
1041         xid = GetXid();
1042
1043         cifs_sb = CIFS_SB(inode->i_sb);
1044         pTcon = cifs_sb->tcon;
1045
1046         full_path = build_path_from_dentry(direntry);
1047         if (full_path == NULL) {
1048                 FreeXid(xid);
1049                 return -ENOMEM;
1050         }
1051
1052         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1053                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1054
1055         if (!rc) {
1056                 drop_nlink(inode);
1057                 spin_lock(&direntry->d_inode->i_lock);
1058                 i_size_write(direntry->d_inode,0);
1059                 clear_nlink(direntry->d_inode);
1060                 spin_unlock(&direntry->d_inode->i_lock);
1061         }
1062
1063         cifsInode = CIFS_I(direntry->d_inode);
1064         cifsInode->time = 0;    /* force revalidate to go get info when
1065                                    needed */
1066         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1067                 current_fs_time(inode->i_sb);
1068
1069         kfree(full_path);
1070         FreeXid(xid);
1071         return rc;
1072 }
1073
1074 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1075         struct inode *target_inode, struct dentry *target_direntry)
1076 {
1077         char *fromName;
1078         char *toName;
1079         struct cifs_sb_info *cifs_sb_source;
1080         struct cifs_sb_info *cifs_sb_target;
1081         struct cifsTconInfo *pTcon;
1082         int xid;
1083         int rc = 0;
1084
1085         xid = GetXid();
1086
1087         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1088         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1089         pTcon = cifs_sb_source->tcon;
1090
1091         if (pTcon != cifs_sb_target->tcon) {
1092                 FreeXid(xid);
1093                 return -EXDEV;  /* BB actually could be allowed if same server,
1094                                    but different share.
1095                                    Might eventually add support for this */
1096         }
1097
1098         /* we already  have the rename sem so we do not need to grab it again
1099            here to protect the path integrity */
1100         fromName = build_path_from_dentry(source_direntry);
1101         toName = build_path_from_dentry(target_direntry);
1102         if ((fromName == NULL) || (toName == NULL)) {
1103                 rc = -ENOMEM;
1104                 goto cifs_rename_exit;
1105         }
1106
1107         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1108                            cifs_sb_source->local_nls,
1109                            cifs_sb_source->mnt_cifs_flags &
1110                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1111         if (rc == -EEXIST) {
1112                 /* check if they are the same file because rename of hardlinked
1113                    files is a noop */
1114                 FILE_UNIX_BASIC_INFO *info_buf_source;
1115                 FILE_UNIX_BASIC_INFO *info_buf_target;
1116
1117                 info_buf_source =
1118                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1119                 if (info_buf_source != NULL) {
1120                         info_buf_target = info_buf_source + 1;
1121                         if (pTcon->ses->capabilities & CAP_UNIX)
1122                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1123                                         info_buf_source,
1124                                         cifs_sb_source->local_nls,
1125                                         cifs_sb_source->mnt_cifs_flags &
1126                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1127                         /* else rc is still EEXIST so will fall through to
1128                            unlink the target and retry rename */
1129                         if (rc == 0) {
1130                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1131                                                 info_buf_target,
1132                                                 cifs_sb_target->local_nls,
1133                                                 /* remap based on source sb */
1134                                                 cifs_sb_source->mnt_cifs_flags &
1135                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1136                         }
1137                         if ((rc == 0) &&
1138                             (info_buf_source->UniqueId ==
1139                              info_buf_target->UniqueId)) {
1140                         /* do not rename since the files are hardlinked which
1141                            is a noop */
1142                         } else {
1143                         /* we either can not tell the files are hardlinked
1144                            (as with Windows servers) or files are not
1145                            hardlinked so delete the target manually before
1146                            renaming to follow POSIX rather than Windows
1147                            semantics */
1148                                 cifs_unlink(target_inode, target_direntry);
1149                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1150                                                    toName,
1151                                                    cifs_sb_source->local_nls,
1152                                                    cifs_sb_source->mnt_cifs_flags
1153                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1154                         }
1155                         kfree(info_buf_source);
1156                 } /* if we can not get memory just leave rc as EEXIST */
1157         }
1158
1159         if (rc) {
1160                 cFYI(1, ("rename rc %d", rc));
1161         }
1162
1163         if ((rc == -EIO) || (rc == -EEXIST)) {
1164                 int oplock = FALSE;
1165                 __u16 netfid;
1166
1167                 /* BB FIXME Is Generic Read correct for rename? */
1168                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1169                    need to test renaming open directory, also GENERIC_READ
1170                    might not right be right access to request */
1171                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1172                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1173                                  cifs_sb_source->local_nls,
1174                                  cifs_sb_source->mnt_cifs_flags &
1175                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1176                 if (rc==0) {
1177                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1178                                               cifs_sb_source->local_nls,
1179                                               cifs_sb_source->mnt_cifs_flags &
1180                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1181                         CIFSSMBClose(xid, pTcon, netfid);
1182                 }
1183         }
1184
1185 cifs_rename_exit:
1186         kfree(fromName);
1187         kfree(toName);
1188         FreeXid(xid);
1189         return rc;
1190 }
1191
1192 int cifs_revalidate(struct dentry *direntry)
1193 {
1194         int xid;
1195         int rc = 0;
1196         char *full_path;
1197         struct cifs_sb_info *cifs_sb;
1198         struct cifsInodeInfo *cifsInode;
1199         loff_t local_size;
1200         struct timespec local_mtime;
1201         int invalidate_inode = FALSE;
1202
1203         if (direntry->d_inode == NULL)
1204                 return -ENOENT;
1205
1206         cifsInode = CIFS_I(direntry->d_inode);
1207
1208         if (cifsInode == NULL)
1209                 return -ENOENT;
1210
1211         /* no sense revalidating inode info on file that no one can write */
1212         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1213                 return rc;
1214
1215         xid = GetXid();
1216
1217         cifs_sb = CIFS_SB(direntry->d_sb);
1218
1219         /* can not safely grab the rename sem here if rename calls revalidate
1220            since that would deadlock */
1221         full_path = build_path_from_dentry(direntry);
1222         if (full_path == NULL) {
1223                 FreeXid(xid);
1224                 return -ENOMEM;
1225         }
1226         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1227                  "jiffies %ld", full_path, direntry->d_inode,
1228                  direntry->d_inode->i_count.counter, direntry,
1229                  direntry->d_time, jiffies));
1230
1231         if (cifsInode->time == 0) {
1232                 /* was set to zero previously to force revalidate */
1233         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1234                    lookupCacheEnabled) {
1235                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1236                     (direntry->d_inode->i_nlink == 1)) {
1237                         kfree(full_path);
1238                         FreeXid(xid);
1239                         return rc;
1240                 } else {
1241                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1242                 }
1243         }
1244
1245         /* save mtime and size */
1246         local_mtime = direntry->d_inode->i_mtime;
1247         local_size = direntry->d_inode->i_size;
1248
1249         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1250                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1251                                               direntry->d_sb,xid);
1252                 if (rc) {
1253                         cFYI(1, ("error on getting revalidate info %d", rc));
1254 /*                      if (rc != -ENOENT)
1255                                 rc = 0; */      /* BB should we cache info on
1256                                                    certain errors? */
1257                 }
1258         } else {
1259                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1260                                          direntry->d_sb,xid);
1261                 if (rc) {
1262                         cFYI(1, ("error on getting revalidate info %d", rc));
1263 /*                      if (rc != -ENOENT)
1264                                 rc = 0; */      /* BB should we cache info on
1265                                                    certain errors? */
1266                 }
1267         }
1268         /* should we remap certain errors, access denied?, to zero */
1269
1270         /* if not oplocked, we invalidate inode pages if mtime or file size
1271            had changed on server */
1272
1273         if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1274             (local_size == direntry->d_inode->i_size)) {
1275                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1276         } else {
1277                 /* file may have changed on server */
1278                 if (cifsInode->clientCanCacheRead) {
1279                         /* no need to invalidate inode pages since we were the
1280                            only ones who could have modified the file and the
1281                            server copy is staler than ours */
1282                 } else {
1283                         invalidate_inode = TRUE;
1284                 }
1285         }
1286
1287         /* can not grab this sem since kernel filesys locking documentation
1288            indicates i_mutex may be taken by the kernel on lookup and rename
1289            which could deadlock if we grab the i_mutex here as well */
1290 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1291         /* need to write out dirty pages here  */
1292         if (direntry->d_inode->i_mapping) {
1293                 /* do we need to lock inode until after invalidate completes
1294                    below? */
1295                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1296         }
1297         if (invalidate_inode) {
1298         /* shrink_dcache not necessary now that cifs dentry ops
1299         are exported for negative dentries */
1300 /*              if(S_ISDIR(direntry->d_inode->i_mode))
1301                         shrink_dcache_parent(direntry); */
1302                 if (S_ISREG(direntry->d_inode->i_mode)) {
1303                         if (direntry->d_inode->i_mapping)
1304                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1305                         /* may eventually have to do this for open files too */
1306                         if (list_empty(&(cifsInode->openFileList))) {
1307                                 /* changed on server - flush read ahead pages */
1308                                 cFYI(1, ("Invalidating read ahead data on "
1309                                          "closed file"));
1310                                 invalidate_remote_inode(direntry->d_inode);
1311                         }
1312                 }
1313         }
1314 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1315
1316         kfree(full_path);
1317         FreeXid(xid);
1318         return rc;
1319 }
1320
1321 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1322         struct kstat *stat)
1323 {
1324         int err = cifs_revalidate(dentry);
1325         if (!err) {
1326                 generic_fillattr(dentry->d_inode, stat);
1327                 stat->blksize = CIFS_MAX_MSGSIZE;
1328         }
1329         return err;
1330 }
1331
1332 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1333 {
1334         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1335         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1336         struct page *page;
1337         char *kaddr;
1338         int rc = 0;
1339
1340         page = grab_cache_page(mapping, index);
1341         if (!page)
1342                 return -ENOMEM;
1343
1344         kaddr = kmap_atomic(page, KM_USER0);
1345         memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1346         flush_dcache_page(page);
1347         kunmap_atomic(kaddr, KM_USER0);
1348         unlock_page(page);
1349         page_cache_release(page);
1350         return rc;
1351 }
1352
1353 static int cifs_vmtruncate(struct inode * inode, loff_t offset)
1354 {
1355         struct address_space *mapping = inode->i_mapping;
1356         unsigned long limit;
1357
1358         spin_lock(&inode->i_lock);
1359         if (inode->i_size < offset)
1360                 goto do_expand;
1361         /*
1362          * truncation of in-use swapfiles is disallowed - it would cause
1363          * subsequent swapout to scribble on the now-freed blocks.
1364          */
1365         if (IS_SWAPFILE(inode)) {
1366                 spin_unlock(&inode->i_lock);
1367                 goto out_busy;
1368         }
1369         i_size_write(inode, offset);
1370         spin_unlock(&inode->i_lock);
1371         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1372         truncate_inode_pages(mapping, offset);
1373         goto out_truncate;
1374
1375 do_expand:
1376         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1377         if (limit != RLIM_INFINITY && offset > limit) {
1378                 spin_unlock(&inode->i_lock);
1379                 goto out_sig;
1380         }
1381         if (offset > inode->i_sb->s_maxbytes) {
1382                 spin_unlock(&inode->i_lock);
1383                 goto out_big;
1384         }
1385         i_size_write(inode, offset);
1386         spin_unlock(&inode->i_lock);
1387 out_truncate:
1388         if (inode->i_op && inode->i_op->truncate)
1389                 inode->i_op->truncate(inode);
1390         return 0;
1391 out_sig:
1392         send_sig(SIGXFSZ, current, 0);
1393 out_big:
1394         return -EFBIG;
1395 out_busy:
1396         return -ETXTBSY;
1397 }
1398
1399 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1400 {
1401         int xid;
1402         struct cifs_sb_info *cifs_sb;
1403         struct cifsTconInfo *pTcon;
1404         char *full_path = NULL;
1405         int rc = -EACCES;
1406         struct cifsFileInfo *open_file = NULL;
1407         FILE_BASIC_INFO time_buf;
1408         int set_time = FALSE;
1409         int set_dosattr = FALSE;
1410         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1411         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1412         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1413         struct cifsInodeInfo *cifsInode;
1414
1415         xid = GetXid();
1416
1417         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1418                  direntry->d_name.name, attrs->ia_valid));
1419
1420         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1421         pTcon = cifs_sb->tcon;
1422
1423         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1424                 /* check if we have permission to change attrs */
1425                 rc = inode_change_ok(direntry->d_inode, attrs);
1426                 if(rc < 0) {
1427                         FreeXid(xid);
1428                         return rc;
1429                 } else
1430                         rc = 0;
1431         }
1432
1433         full_path = build_path_from_dentry(direntry);
1434         if (full_path == NULL) {
1435                 FreeXid(xid);
1436                 return -ENOMEM;
1437         }
1438         cifsInode = CIFS_I(direntry->d_inode);
1439
1440         /* BB check if we need to refresh inode from server now ? BB */
1441
1442         /* need to flush data before changing file size on server */
1443         filemap_write_and_wait(direntry->d_inode->i_mapping);
1444
1445         if (attrs->ia_valid & ATTR_SIZE) {
1446                 /* To avoid spurious oplock breaks from server, in the case of
1447                    inodes that we already have open, avoid doing path based
1448                    setting of file size if we can do it by handle.
1449                    This keeps our caching token (oplock) and avoids timeouts
1450                    when the local oplock break takes longer to flush
1451                    writebehind data than the SMB timeout for the SetPathInfo
1452                    request would allow */
1453
1454                 open_file = find_writable_file(cifsInode);
1455                 if (open_file) {
1456                         __u16 nfid = open_file->netfid;
1457                         __u32 npid = open_file->pid;
1458                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1459                                                 nfid, npid, FALSE);
1460                         atomic_dec(&open_file->wrtPending);
1461                         cFYI(1,("SetFSize for attrs rc = %d", rc));
1462                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1463                                 int bytes_written;
1464                                 rc = CIFSSMBWrite(xid, pTcon,
1465                                                   nfid, 0, attrs->ia_size,
1466                                                   &bytes_written, NULL, NULL,
1467                                                   1 /* 45 seconds */);
1468                                 cFYI(1,("Wrt seteof rc %d", rc));
1469                         }
1470                 } else
1471                         rc = -EINVAL;
1472
1473                 if (rc != 0) {
1474                         /* Set file size by pathname rather than by handle
1475                            either because no valid, writeable file handle for
1476                            it was found or because there was an error setting
1477                            it by handle */
1478                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1479                                            attrs->ia_size, FALSE,
1480                                            cifs_sb->local_nls,
1481                                            cifs_sb->mnt_cifs_flags &
1482                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1483                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1484                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1485                                 __u16 netfid;
1486                                 int oplock = FALSE;
1487
1488                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1489                                         FILE_OPEN,
1490                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1491                                         CREATE_NOT_DIR, &netfid, &oplock,
1492                                         NULL, cifs_sb->local_nls,
1493                                         cifs_sb->mnt_cifs_flags &
1494                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1495                                 if (rc==0) {
1496                                         int bytes_written;
1497                                         rc = CIFSSMBWrite(xid, pTcon,
1498                                                         netfid, 0,
1499                                                         attrs->ia_size,
1500                                                         &bytes_written, NULL,
1501                                                         NULL, 1 /* 45 sec */);
1502                                         cFYI(1,("wrt seteof rc %d",rc));
1503                                         CIFSSMBClose(xid, pTcon, netfid);
1504                                 }
1505
1506                         }
1507                 }
1508
1509                 /* Server is ok setting allocation size implicitly - no need
1510                    to call:
1511                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1512                          cifs_sb->local_nls);
1513                    */
1514
1515                 if (rc == 0) {
1516                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1517                         cifs_truncate_page(direntry->d_inode->i_mapping,
1518                                            direntry->d_inode->i_size);
1519                 } else
1520                         goto cifs_setattr_exit;
1521         }
1522         if (attrs->ia_valid & ATTR_UID) {
1523                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1524                 uid = attrs->ia_uid;
1525         }
1526         if (attrs->ia_valid & ATTR_GID) {
1527                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1528                 gid = attrs->ia_gid;
1529         }
1530
1531         time_buf.Attributes = 0;
1532         if (attrs->ia_valid & ATTR_MODE) {
1533                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1534                 mode = attrs->ia_mode;
1535         }
1536
1537         if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1538             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1539                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1540                                          0 /* dev_t */, cifs_sb->local_nls,
1541                                          cifs_sb->mnt_cifs_flags &
1542                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1543         else if (attrs->ia_valid & ATTR_MODE) {
1544                 rc = 0;
1545                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1546                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1547                                 set_dosattr = TRUE;
1548                                 time_buf.Attributes =
1549                                         cpu_to_le32(cifsInode->cifsAttrs |
1550                                                     ATTR_READONLY);
1551                         }
1552                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1553                         /* If file is readonly on server, we would
1554                         not be able to write to it - so if any write
1555                         bit is enabled for user or group or other we
1556                         need to at least try to remove r/o dos attr */
1557                         set_dosattr = TRUE;
1558                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1559                                             (~ATTR_READONLY));
1560                         /* Windows ignores set to zero */
1561                         if(time_buf.Attributes == 0)
1562                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1563                 }
1564                 /* BB to be implemented -
1565                    via Windows security descriptors or streams */
1566                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1567                                       cifs_sb->local_nls); */
1568         }
1569
1570         if (attrs->ia_valid & ATTR_ATIME) {
1571                 set_time = TRUE;
1572                 time_buf.LastAccessTime =
1573                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1574         } else
1575                 time_buf.LastAccessTime = 0;
1576
1577         if (attrs->ia_valid & ATTR_MTIME) {
1578                 set_time = TRUE;
1579                 time_buf.LastWriteTime =
1580                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1581         } else
1582                 time_buf.LastWriteTime = 0;
1583         /* Do not set ctime explicitly unless other time
1584            stamps are changed explicitly (i.e. by utime()
1585            since we would then have a mix of client and
1586            server times */
1587
1588         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1589                 set_time = TRUE;
1590                 /* Although Samba throws this field away
1591                 it may be useful to Windows - but we do
1592                 not want to set ctime unless some other
1593                 timestamp is changing */
1594                 cFYI(1, ("CIFS - CTIME changed"));
1595                 time_buf.ChangeTime =
1596                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1597         } else
1598                 time_buf.ChangeTime = 0;
1599
1600         if (set_time || set_dosattr) {
1601                 time_buf.CreationTime = 0;      /* do not change */
1602                 /* In the future we should experiment - try setting timestamps
1603                    via Handle (SetFileInfo) instead of by path */
1604                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1605                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1606                                              cifs_sb->local_nls,
1607                                              cifs_sb->mnt_cifs_flags &
1608                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1609                 else
1610                         rc = -EOPNOTSUPP;
1611
1612                 if (rc == -EOPNOTSUPP) {
1613                         int oplock = FALSE;
1614                         __u16 netfid;
1615
1616                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1617                                  "times not supported by this server"));
1618                         /* BB we could scan to see if we already have it open
1619                            and pass in pid of opener to function */
1620                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1621                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1622                                          CREATE_NOT_DIR, &netfid, &oplock,
1623                                          NULL, cifs_sb->local_nls,
1624                                          cifs_sb->mnt_cifs_flags &
1625                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1626                         if (rc==0) {
1627                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1628                                                          netfid);
1629                                 CIFSSMBClose(xid, pTcon, netfid);
1630                         } else {
1631                         /* BB For even older servers we could convert time_buf
1632                            into old DOS style which uses two second
1633                            granularity */
1634
1635                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1636                                         &time_buf, cifs_sb->local_nls); */
1637                         }
1638                 }
1639                 /* Even if error on time set, no sense failing the call if
1640                 the server would set the time to a reasonable value anyway,
1641                 and this check ensures that we are not being called from
1642                 sys_utimes in which case we ought to fail the call back to
1643                 the user when the server rejects the call */
1644                 if((rc) && (attrs->ia_valid &
1645                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1646                         rc = 0;
1647         }
1648
1649         /* do not need local check to inode_check_ok since the server does
1650            that */
1651         if (!rc)
1652                 rc = inode_setattr(direntry->d_inode, attrs);
1653 cifs_setattr_exit:
1654         kfree(full_path);
1655         FreeXid(xid);
1656         return rc;
1657 }
1658
1659 #if 0
1660 void cifs_delete_inode(struct inode *inode)
1661 {
1662         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1663         /* may have to add back in if and when safe distributed caching of
1664            directories added e.g. via FindNotify */
1665 }
1666 #endif