fs/cifs/inode.c

   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2005
   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/buffer_head.h>
  23 #include <linux/stat.h>
  24 #include <linux/pagemap.h>
  25 #include <asm/div64.h>
  26 #include "cifsfs.h"
  27 #include "cifspdu.h"
  28 #include "cifsglob.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_fs_sb.h"
  32
  33 int cifs_get_inode_info_unix(struct inode **pinode,
  34         const unsigned char *search_path, struct super_block *sb, int xid)
  35 {
  36         int rc = 0;
  37         FILE_UNIX_BASIC_INFO findData;
  38         struct cifsTconInfo *pTcon;
  39         struct inode *inode;
  40         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  41         char *tmp_path;
  42
  43         pTcon = cifs_sb->tcon;
  44         cFYI(1, ("Getting info on %s", search_path));
  45         /* could have done a find first instead but this returns more info */
  46         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  47                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  48                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  49 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  50                  sizeof(findData)); */
  51         if (rc) {
  52                 if (rc == -EREMOTE) {
  53                         tmp_path =
  54                             kmalloc(strnlen(pTcon->treeName,
  55                                             MAX_TREE_SIZE + 1) +
  56                                     strnlen(search_path, MAX_PATHCONF) + 1,
  57                                     GFP_KERNEL);
  58                         if (tmp_path == NULL) {
  59                                 return -ENOMEM;
  60                         }
  61                         /* have to skip first of the double backslash of
  62                            UNC name */
  63                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  64                         strncat(tmp_path, search_path, MAX_PATHCONF);
  65                         rc = connect_to_dfs_path(xid, pTcon->ses,
  66                                                  /* treename + */ tmp_path,
  67                                                  cifs_sb->local_nls,
  68                                                  cifs_sb->mnt_cifs_flags &
  69                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  70                         kfree(tmp_path);
  71
  72                         /* BB fix up inode etc. */
  73                 } else if (rc) {
  74                         return rc;
  75                 }
  76         } else {
  77                 struct cifsInodeInfo *cifsInfo;
  78                 __u32 type = le32_to_cpu(findData.Type);
  79                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  80                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  81
  82                 /* get new inode */
  83                 if (*pinode == NULL) {
  84                         *pinode = new_inode(sb);
  85                         if (*pinode == NULL)
  86                                 return -ENOMEM;
  87                         /* Is an i_ino of zero legal? */
  88                         /* Are there sanity checks we can use to ensure that
  89                            the server is really filling in that field? */
  90                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  91                                 (*pinode)->i_ino =
  92                                         (unsigned long)findData.UniqueId;
  93                         } /* note ino incremented to unique num in new_inode */
  94                         insert_inode_hash(*pinode);
  95                 }
  96
  97                 inode = *pinode;
  98                 cifsInfo = CIFS_I(inode);
  99
 100                 cFYI(1, ("Old time %ld", cifsInfo->time));
 101                 cifsInfo->time = jiffies;
 102                 cFYI(1, ("New time %ld", cifsInfo->time));
 103                 /* this is ok to set on every inode revalidate */
 104                 atomic_set(&cifsInfo->inUse,1);
 105
 106                 inode->i_atime =
 107                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 108                 inode->i_mtime =
 109                     cifs_NTtimeToUnix(le64_to_cpu
 110                                 (findData.LastModificationTime));
 111                 inode->i_ctime =
 112                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 113                 inode->i_mode = le64_to_cpu(findData.Permissions);
 114                 /* since we set the inode type below we need to mask off
 115                    to avoid strange results if bits set above */
 116                         inode->i_mode &= ~S_IFMT;
 117                 if (type == UNIX_FILE) {
 118                         inode->i_mode |= S_IFREG;
 119                 } else if (type == UNIX_SYMLINK) {
 120                         inode->i_mode |= S_IFLNK;
 121                 } else if (type == UNIX_DIR) {
 122                         inode->i_mode |= S_IFDIR;
 123                 } else if (type == UNIX_CHARDEV) {
 124                         inode->i_mode |= S_IFCHR;
 125                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 126                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 127                 } else if (type == UNIX_BLOCKDEV) {
 128                         inode->i_mode |= S_IFBLK;
 129                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 130                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 131                 } else if (type == UNIX_FIFO) {
 132                         inode->i_mode |= S_IFIFO;
 133                 } else if (type == UNIX_SOCKET) {
 134                         inode->i_mode |= S_IFSOCK;
 135                 } else {
 136                         /* safest to call it a file if we do not know */
 137                         inode->i_mode |= S_IFREG;
 138                         cFYI(1,("unknown type %d",type));
 139                 }
 140                 inode->i_uid = le64_to_cpu(findData.Uid);
 141                 inode->i_gid = le64_to_cpu(findData.Gid);
 142                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 143
 144                 if (is_size_safe_to_change(cifsInfo)) {
 145                 /* can not safely change the file size here if the
 146                    client is writing to it due to potential races */
 147
 148                         i_size_write(inode, end_of_file);
 149
 150                 /* blksize needs to be multiple of two. So safer to default to
 151                 blksize and blkbits set in superblock so 2**blkbits and blksize
 152                 will match rather than setting to:
 153                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 154
 155                 /* This seems incredibly stupid but it turns out that i_blocks
 156                    is not related to (i_size / i_blksize), instead 512 byte size
 157                    is required for calculating num blocks */
 158
 159                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 160                 /* for this calculation */
 161                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 162                 }
 163
 164                 if (num_of_bytes < end_of_file)
 165                         cFYI(1, ("allocation size less than end of file"));
 166                 cFYI(1, ("Size %ld and blocks %llu",
 167                         (unsigned long) inode->i_size,
 168                         (unsigned long long)inode->i_blocks));
 169                 if (S_ISREG(inode->i_mode)) {
 170                         cFYI(1, ("File inode"));
 171                         inode->i_op = &cifs_file_inode_ops;
 172                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 173                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 174                                         inode->i_fop =
 175                                                 &cifs_file_direct_nobrl_ops;
 176                                 else
 177                                         inode->i_fop = &cifs_file_direct_ops;
 178                         } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 179                                 inode->i_fop = &cifs_file_nobrl_ops;
 180                         else /* not direct, send byte range locks */
 181                                 inode->i_fop = &cifs_file_ops;
 182
 183                         /* check if server can support readpages */
 184                         if(pTcon->ses->server->maxBuf <
 185                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 186                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 187                         else
 188                                 inode->i_data.a_ops = &cifs_addr_ops;
 189                 } else if (S_ISDIR(inode->i_mode)) {
 190                         cFYI(1, ("Directory inode"));
 191                         inode->i_op = &cifs_dir_inode_ops;
 192                         inode->i_fop = &cifs_dir_ops;
 193                 } else if (S_ISLNK(inode->i_mode)) {
 194                         cFYI(1, ("Symbolic Link inode"));
 195                         inode->i_op = &cifs_symlink_inode_ops;
 196                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 197                 } else {
 198                         cFYI(1, ("Init special inode"));
 199                         init_special_inode(inode, inode->i_mode,
 200                                            inode->i_rdev);
 201                 }
 202         }
 203         return rc;
 204 }
 205
 206 static int decode_sfu_inode(struct inode * inode, __u64 size,
 207                             const unsigned char *path,
 208                             struct cifs_sb_info *cifs_sb, int xid)
 209 {
 210         int rc;
 211         int oplock = FALSE;
 212         __u16 netfid;
 213         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 214         char buf[24];
 215         unsigned int bytes_read;
 216         char * pbuf;
 217
 218         pbuf = buf;
 219
 220         if(size == 0) {
 221                 inode->i_mode |= S_IFIFO;
 222                 return 0;
 223         } else if (size < 8) {
 224                 return -EINVAL;  /* EOPNOTSUPP? */
 225         }
 226
 227         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 228                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 229                          cifs_sb->local_nls,
 230                          cifs_sb->mnt_cifs_flags &
 231                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 232         if (rc==0) {
 233                 int buf_type = CIFS_NO_BUFFER;
 234                         /* Read header */
 235                 rc = CIFSSMBRead(xid, pTcon,
 236                                  netfid,
 237                                  24 /* length */, 0 /* offset */,
 238                                  &bytes_read, &pbuf, &buf_type);
 239                 if((rc == 0) && (bytes_read >= 8)) {
 240                         if(memcmp("IntxBLK", pbuf, 8) == 0) {
 241                                 cFYI(1,("Block device"));
 242                                 inode->i_mode |= S_IFBLK;
 243                                 if(bytes_read == 24) {
 244                                         /* we have enough to decode dev num */
 245                                         __u64 mjr; /* major */
 246                                         __u64 mnr; /* minor */
 247                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 248                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 249                                         inode->i_rdev = MKDEV(mjr, mnr);
 250                                 }
 251                         } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
 252                                 cFYI(1,("Char device"));
 253                                 inode->i_mode |= S_IFCHR;
 254                                 if(bytes_read == 24) {
 255                                         /* we have enough to decode dev num */
 256                                         __u64 mjr; /* major */
 257                                         __u64 mnr; /* minor */
 258                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 259                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 260                                         inode->i_rdev = MKDEV(mjr, mnr);
 261                                 }
 262                         } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
 263                                 cFYI(1,("Symlink"));
 264                                 inode->i_mode |= S_IFLNK;
 265                         } else {
 266                                 inode->i_mode |= S_IFREG; /* file? */
 267                                 rc = -EOPNOTSUPP;
 268                         }
 269                 } else {
 270                         inode->i_mode |= S_IFREG; /* then it is a file */
 271                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 272                 }
 273                 CIFSSMBClose(xid, pTcon, netfid);
 274         }
 275         return rc;
 276
 277 }
 278
 279 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 280
 281 static int get_sfu_uid_mode(struct inode * inode,
 282                         const unsigned char *path,
 283                         struct cifs_sb_info *cifs_sb, int xid)
 284 {
 285 #ifdef CONFIG_CIFS_XATTR
 286         ssize_t rc;
 287         char ea_value[4];
 288         __u32 mode;
 289
 290         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 291                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 292                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 293         if(rc < 0)
 294                 return (int)rc;
 295         else if (rc > 3) {
 296                 mode = le32_to_cpu(*((__le32 *)ea_value));
 297                 inode->i_mode &= ~SFBITS_MASK;
 298                 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
 299                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 300                 cFYI(1,("special mode bits 0%o", mode));
 301                 return 0;
 302         } else {
 303                 return 0;
 304         }
 305 #else
 306         return -EOPNOTSUPP;
 307 #endif
 308
 309
 310 }
 311
 312 int cifs_get_inode_info(struct inode **pinode,
 313         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 314         struct super_block *sb, int xid)
 315 {
 316         int rc = 0;
 317         struct cifsTconInfo *pTcon;
 318         struct inode *inode;
 319         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 320         char *tmp_path;
 321         char *buf = NULL;
 322
 323         pTcon = cifs_sb->tcon;
 324         cFYI(1,("Getting info on %s", search_path));
 325
 326         if ((pfindData == NULL) && (*pinode != NULL)) {
 327                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 328                         cFYI(1,("No need to revalidate cached inode sizes"));
 329                         return rc;
 330                 }
 331         }
 332
 333         /* if file info not passed in then get it from server */
 334         if (pfindData == NULL) {
 335                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 336                 if (buf == NULL)
 337                         return -ENOMEM;
 338                 pfindData = (FILE_ALL_INFO *)buf;
 339                 /* could do find first instead but this returns more info */
 340                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 341                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 342                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 343                 /* BB optimize code so we do not make the above call
 344                 when server claims no NT SMB support and the above call
 345                 failed at least once - set flag in tcon or mount */
 346                 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 347                         rc = SMBQueryInformation(xid, pTcon, search_path,
 348                                         pfindData, cifs_sb->local_nls,
 349                                         cifs_sb->mnt_cifs_flags &
 350                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 351                 }
 352
 353         }
 354         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 355         if (rc) {
 356                 if (rc == -EREMOTE) {
 357                         tmp_path =
 358                             kmalloc(strnlen
 359                                     (pTcon->treeName,
 360                                      MAX_TREE_SIZE + 1) +
 361                                     strnlen(search_path, MAX_PATHCONF) + 1,
 362                                     GFP_KERNEL);
 363                         if (tmp_path == NULL) {
 364                                 kfree(buf);
 365                                 return -ENOMEM;
 366                         }
 367
 368                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 369                         strncat(tmp_path, search_path, MAX_PATHCONF);
 370                         rc = connect_to_dfs_path(xid, pTcon->ses,
 371                                                  /* treename + */ tmp_path,
 372                                                  cifs_sb->local_nls,
 373                                                  cifs_sb->mnt_cifs_flags &
 374                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 375                         kfree(tmp_path);
 376                         /* BB fix up inode etc. */
 377                 } else if (rc) {
 378                         kfree(buf);
 379                         return rc;
 380                 }
 381         } else {
 382                 struct cifsInodeInfo *cifsInfo;
 383                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 384
 385                 /* get new inode */
 386                 if (*pinode == NULL) {
 387                         *pinode = new_inode(sb);
 388                         if (*pinode == NULL)
 389                                 return -ENOMEM;
 390                         /* Is an i_ino of zero legal? Can we use that to check
 391                            if the server supports returning inode numbers?  Are
 392                            there other sanity checks we can use to ensure that
 393                            the server is really filling in that field? */
 394
 395                         /* We can not use the IndexNumber field by default from
 396                            Windows or Samba (in ALL_INFO buf) but we can request
 397                            it explicitly.  It may not be unique presumably if
 398                            the server has multiple devices mounted under one
 399                            share */
 400
 401                         /* There may be higher info levels that work but are
 402                            there Windows server or network appliances for which
 403                            IndexNumber field is not guaranteed unique? */
 404
 405                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
 406                                 int rc1 = 0;
 407                                 __u64 inode_num;
 408
 409                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 410                                         search_path, &inode_num,
 411                                         cifs_sb->local_nls,
 412                                         cifs_sb->mnt_cifs_flags &
 413                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 414                                 if (rc1) {
 415                                         cFYI(1,("GetSrvInodeNum rc %d", rc1));
 416                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 417                                 } else /* do we need cast or hash to ino? */
 418                                         (*pinode)->i_ino = inode_num;
 419                         } /* else ino incremented to unique num in new_inode*/
 420                         insert_inode_hash(*pinode);
 421                 }
 422                 inode = *pinode;
 423                 cifsInfo = CIFS_I(inode);
 424                 cifsInfo->cifsAttrs = attr;
 425                 cFYI(1, ("Old time %ld", cifsInfo->time));
 426                 cifsInfo->time = jiffies;
 427                 cFYI(1, ("New time %ld", cifsInfo->time));
 428
 429                 /* blksize needs to be multiple of two. So safer to default to
 430                 blksize and blkbits set in superblock so 2**blkbits and blksize
 431                 will match rather than setting to:
 432                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 433
 434                 /* Linux can not store file creation time so ignore it */
 435                 inode->i_atime =
 436                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
 437                 inode->i_mtime =
 438                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 439                 inode->i_ctime =
 440                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 441                 cFYI(0, ("Attributes came in as 0x%x", attr));
 442
 443                 /* set default mode. will override for dirs below */
 444                 if (atomic_read(&cifsInfo->inUse) == 0)
 445                         /* new inode, can safely set these fields */
 446                         inode->i_mode = cifs_sb->mnt_file_mode;
 447                 else /* since we set the inode type below we need to mask off
 448                      to avoid strange results if type changes and both get orred in */
 449                         inode->i_mode &= ~S_IFMT;
 450 /*              if (attr & ATTR_REPARSE)  */
 451                 /* We no longer handle these as symlinks because we could not
 452                    follow them due to the absolute path with drive letter */
 453                 if (attr & ATTR_DIRECTORY) {
 454                 /* override default perms since we do not do byte range locking
 455                    on dirs */
 456                         inode->i_mode = cifs_sb->mnt_dir_mode;
 457                         inode->i_mode |= S_IFDIR;
 458                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 459                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 460                            /* No need to le64 convert size of zero */
 461                            (pfindData->EndOfFile == 0)) {
 462                         inode->i_mode = cifs_sb->mnt_file_mode;
 463                         inode->i_mode |= S_IFIFO;
 464 /* BB Finish for SFU style symlinks and devices */
 465                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 466                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 467                         if (decode_sfu_inode(inode,
 468                                          le64_to_cpu(pfindData->EndOfFile),
 469                                          search_path,
 470                                          cifs_sb, xid)) {
 471                                 cFYI(1,("Unrecognized sfu inode type"));
 472                         }
 473                         cFYI(1,("sfu mode 0%o",inode->i_mode));
 474                 } else {
 475                         inode->i_mode |= S_IFREG;
 476                         /* treat the dos attribute of read-only as read-only
 477                            mode e.g. 555 */
 478                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 479                                 inode->i_mode &= ~(S_IWUGO);
 480                 /* BB add code here -
 481                    validate if device or weird share or device type? */
 482                 }
 483                 if (is_size_safe_to_change(cifsInfo)) {
 484                         /* can not safely change the file size here if the
 485                            client is writing to it due to potential races */
 486                         i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
 487
 488                         /* 512 bytes (2**9) is the fake blocksize that must be
 489                            used for this calculation */
 490                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 491                                            pfindData->AllocationSize)) >> 9;
 492                 }
 493
 494                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 495
 496                 /* BB fill in uid and gid here? with help from winbind?
 497                    or retrieve from NTFS stream extended attribute */
 498                 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 499                         /* fill in uid, gid, mode from server ACL */
 500                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
 501                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 502                         inode->i_uid = cifs_sb->mnt_uid;
 503                         inode->i_gid = cifs_sb->mnt_gid;
 504                         /* set so we do not keep refreshing these fields with
 505                            bad data after user has changed them in memory */
 506                         atomic_set(&cifsInfo->inUse,1);
 507                 }
 508
 509                 if (S_ISREG(inode->i_mode)) {
 510                         cFYI(1, ("File inode"));
 511                         inode->i_op = &cifs_file_inode_ops;
 512                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 513                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 514                                         inode->i_fop =
 515                                                 &cifs_file_direct_nobrl_ops;
 516                                 else
 517                                         inode->i_fop = &cifs_file_direct_ops;
 518                         } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 519                                 inode->i_fop = &cifs_file_nobrl_ops;
 520                         else /* not direct, send byte range locks */
 521                                 inode->i_fop = &cifs_file_ops;
 522
 523                         if(pTcon->ses->server->maxBuf <
 524                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 525                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 526                         else
 527                                 inode->i_data.a_ops = &cifs_addr_ops;
 528                 } else if (S_ISDIR(inode->i_mode)) {
 529                         cFYI(1, ("Directory inode"));
 530                         inode->i_op = &cifs_dir_inode_ops;
 531                         inode->i_fop = &cifs_dir_ops;
 532                 } else if (S_ISLNK(inode->i_mode)) {
 533                         cFYI(1, ("Symbolic Link inode"));
 534                         inode->i_op = &cifs_symlink_inode_ops;
 535                 } else {
 536                         init_special_inode(inode, inode->i_mode,
 537                                            inode->i_rdev);
 538                 }
 539         }
 540         kfree(buf);
 541         return rc;
 542 }
 543
 544 /* gets root inode */
 545 void cifs_read_inode(struct inode *inode)
 546 {
 547         int xid;
 548         struct cifs_sb_info *cifs_sb;
 549
 550         cifs_sb = CIFS_SB(inode->i_sb);
 551         xid = GetXid();
 552         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
 553                 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
 554         else
 555                 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
 556         /* can not call macro FreeXid here since in a void func */
 557         _FreeXid(xid);
 558 }
 559
 560 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 561 {
 562         int rc = 0;
 563         int xid;
 564         struct cifs_sb_info *cifs_sb;
 565         struct cifsTconInfo *pTcon;
 566         char *full_path = NULL;
 567         struct cifsInodeInfo *cifsInode;
 568         FILE_BASIC_INFO *pinfo_buf;
 569
 570         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 571
 572         xid = GetXid();
 573
 574         if(inode)
 575                 cifs_sb = CIFS_SB(inode->i_sb);
 576         else
 577                 cifs_sb = CIFS_SB(direntry->d_sb);
 578         pTcon = cifs_sb->tcon;
 579
 580         /* Unlink can be called from rename so we can not grab the sem here
 581            since we deadlock otherwise */
 582 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 583         full_path = build_path_from_dentry(direntry);
 584 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 585         if (full_path == NULL) {
 586                 FreeXid(xid);
 587                 return -ENOMEM;
 588         }
 589         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 590                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 591
 592         if (!rc) {
 593                 if (direntry->d_inode)
 594                         direntry->d_inode->i_nlink--;
 595         } else if (rc == -ENOENT) {
 596                 d_drop(direntry);
 597         } else if (rc == -ETXTBSY) {
 598                 int oplock = FALSE;
 599                 __u16 netfid;
 600
 601                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 602                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 603                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 604                                  cifs_sb->mnt_cifs_flags &
 605                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 606                 if (rc==0) {
 607                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 608                                               cifs_sb->local_nls,
 609                                               cifs_sb->mnt_cifs_flags &
 610                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 611                         CIFSSMBClose(xid, pTcon, netfid);
 612                         if (direntry->d_inode)
 613                                 direntry->d_inode->i_nlink--;
 614                 }
 615         } else if (rc == -EACCES) {
 616                 /* try only if r/o attribute set in local lookup data? */
 617                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 618                 if (pinfo_buf) {
 619                         /* ATTRS set to normal clears r/o bit */
 620                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 621                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 622                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 623                                                      pinfo_buf,
 624                                                      cifs_sb->local_nls,
 625                                                      cifs_sb->mnt_cifs_flags &
 626                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 627                         else
 628                                 rc = -EOPNOTSUPP;
 629
 630                         if (rc == -EOPNOTSUPP) {
 631                                 int oplock = FALSE;
 632                                 __u16 netfid;
 633                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 634                                                           full_path,
 635                                                           (__u16)ATTR_NORMAL,
 636                                                           cifs_sb->local_nls);
 637                            For some strange reason it seems that NT4 eats the
 638                            old setattr call without actually setting the
 639                            attributes so on to the third attempted workaround
 640                            */
 641
 642                         /* BB could scan to see if we already have it open
 643                            and pass in pid of opener to function */
 644                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 645                                                  FILE_OPEN, SYNCHRONIZE |
 646                                                  FILE_WRITE_ATTRIBUTES, 0,
 647                                                  &netfid, &oplock, NULL,
 648                                                  cifs_sb->local_nls,
 649                                                  cifs_sb->mnt_cifs_flags &
 650                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 651                                 if (rc==0) {
 652                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 653                                                                  pinfo_buf,
 654                                                                  netfid);
 655                                         CIFSSMBClose(xid, pTcon, netfid);
 656                                 }
 657                         }
 658                         kfree(pinfo_buf);
 659                 }
 660                 if (rc==0) {
 661                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 662                                             cifs_sb->local_nls,
 663                                             cifs_sb->mnt_cifs_flags &
 664                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 665                         if (!rc) {
 666                                 if (direntry->d_inode)
 667                                         direntry->d_inode->i_nlink--;
 668                         } else if (rc == -ETXTBSY) {
 669                                 int oplock = FALSE;
 670                                 __u16 netfid;
 671
 672                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 673                                                  FILE_OPEN, DELETE,
 674                                                  CREATE_NOT_DIR |
 675                                                  CREATE_DELETE_ON_CLOSE,
 676                                                  &netfid, &oplock, NULL,
 677                                                  cifs_sb->local_nls,
 678                                                  cifs_sb->mnt_cifs_flags &
 679                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 680                                 if (rc==0) {
 681                                         CIFSSMBRenameOpenFile(xid, pTcon,
 682                                                 netfid, NULL,
 683                                                 cifs_sb->local_nls,
 684                                                 cifs_sb->mnt_cifs_flags &
 685                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 686                                         CIFSSMBClose(xid, pTcon, netfid);
 687                                         if (direntry->d_inode)
 688                                                 direntry->d_inode->i_nlink--;
 689                                 }
 690                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 691                         }
 692                 }
 693         }
 694         if (direntry->d_inode) {
 695                 cifsInode = CIFS_I(direntry->d_inode);
 696                 cifsInode->time = 0;    /* will force revalidate to get info
 697                                            when needed */
 698                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 699         }
 700         if(inode) {
 701                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 702                 cifsInode = CIFS_I(inode);
 703                 cifsInode->time = 0;    /* force revalidate of dir as well */
 704         }
 705
 706         kfree(full_path);
 707         FreeXid(xid);
 708         return rc;
 709 }
 710
 711 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 712 {
 713         int rc = 0;
 714         int xid;
 715         struct cifs_sb_info *cifs_sb;
 716         struct cifsTconInfo *pTcon;
 717         char *full_path = NULL;
 718         struct inode *newinode = NULL;
 719
 720         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 721
 722         xid = GetXid();
 723
 724         cifs_sb = CIFS_SB(inode->i_sb);
 725         pTcon = cifs_sb->tcon;
 726
 727         full_path = build_path_from_dentry(direntry);
 728         if (full_path == NULL) {
 729                 FreeXid(xid);
 730                 return -ENOMEM;
 731         }
 732         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 733         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 734                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 735         if (rc) {
 736                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 737                 d_drop(direntry);
 738         } else {
 739                 inode->i_nlink++;
 740                 if (pTcon->ses->capabilities & CAP_UNIX)
 741                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 742                                                       inode->i_sb,xid);
 743                 else
 744                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 745                                                  inode->i_sb,xid);
 746
 747                 if (pTcon->nocase)
 748                         direntry->d_op = &cifs_ci_dentry_ops;
 749                 else
 750                         direntry->d_op = &cifs_dentry_ops;
 751                 d_instantiate(direntry, newinode);
 752                 if (direntry->d_inode)
 753                         direntry->d_inode->i_nlink = 2;
 754                 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
 755                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 756                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 757                                                     mode,
 758                                                     (__u64)current->fsuid,
 759                                                     (__u64)current->fsgid,
 760                                                     0 /* dev_t */,
 761                                                     cifs_sb->local_nls,
 762                                                     cifs_sb->mnt_cifs_flags &
 763                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 764                         } else {
 765                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 766                                                     mode, (__u64)-1,
 767                                                     (__u64)-1, 0 /* dev_t */,
 768                                                     cifs_sb->local_nls,
 769                                                     cifs_sb->mnt_cifs_flags &
 770                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 771                         }
 772                 else {
 773                         /* BB to be implemented via Windows secrty descriptors
 774                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
 775                                                  -1, -1, local_nls); */
 776                         if(direntry->d_inode) {
 777                                 direntry->d_inode->i_mode = mode;
 778                                 direntry->d_inode->i_mode |= S_IFDIR;
 779                                 if(cifs_sb->mnt_cifs_flags &
 780                                      CIFS_MOUNT_SET_UID) {
 781                                         direntry->d_inode->i_uid =
 782                                                 current->fsuid;
 783                                         direntry->d_inode->i_gid =
 784                                                 current->fsgid;
 785                                 }
 786                         }
 787                 }
 788         }
 789         kfree(full_path);
 790         FreeXid(xid);
 791         return rc;
 792 }
 793
 794 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
 795 {
 796         int rc = 0;
 797         int xid;
 798         struct cifs_sb_info *cifs_sb;
 799         struct cifsTconInfo *pTcon;
 800         char *full_path = NULL;
 801         struct cifsInodeInfo *cifsInode;
 802
 803         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
 804
 805         xid = GetXid();
 806
 807         cifs_sb = CIFS_SB(inode->i_sb);
 808         pTcon = cifs_sb->tcon;
 809
 810         full_path = build_path_from_dentry(direntry);
 811         if (full_path == NULL) {
 812                 FreeXid(xid);
 813                 return -ENOMEM;
 814         }
 815
 816         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
 817                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 818
 819         if (!rc) {
 820                 inode->i_nlink--;
 821                 i_size_write(direntry->d_inode,0);
 822                 direntry->d_inode->i_nlink = 0;
 823         }
 824
 825         cifsInode = CIFS_I(direntry->d_inode);
 826         cifsInode->time = 0;    /* force revalidate to go get info when
 827                                    needed */
 828         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
 829                 current_fs_time(inode->i_sb);
 830
 831         kfree(full_path);
 832         FreeXid(xid);
 833         return rc;
 834 }
 835
 836 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
 837         struct inode *target_inode, struct dentry *target_direntry)
 838 {
 839         char *fromName;
 840         char *toName;
 841         struct cifs_sb_info *cifs_sb_source;
 842         struct cifs_sb_info *cifs_sb_target;
 843         struct cifsTconInfo *pTcon;
 844         int xid;
 845         int rc = 0;
 846
 847         xid = GetXid();
 848
 849         cifs_sb_target = CIFS_SB(target_inode->i_sb);
 850         cifs_sb_source = CIFS_SB(source_inode->i_sb);
 851         pTcon = cifs_sb_source->tcon;
 852
 853         if (pTcon != cifs_sb_target->tcon) {
 854                 FreeXid(xid);
 855                 return -EXDEV;  /* BB actually could be allowed if same server,
 856                                    but different share.
 857                                    Might eventually add support for this */
 858         }
 859
 860         /* we already  have the rename sem so we do not need to grab it again
 861            here to protect the path integrity */
 862         fromName = build_path_from_dentry(source_direntry);
 863         toName = build_path_from_dentry(target_direntry);
 864         if ((fromName == NULL) || (toName == NULL)) {
 865                 rc = -ENOMEM;
 866                 goto cifs_rename_exit;
 867         }
 868
 869         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
 870                            cifs_sb_source->local_nls,
 871                            cifs_sb_source->mnt_cifs_flags &
 872                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 873         if (rc == -EEXIST) {
 874                 /* check if they are the same file because rename of hardlinked
 875                    files is a noop */
 876                 FILE_UNIX_BASIC_INFO *info_buf_source;
 877                 FILE_UNIX_BASIC_INFO *info_buf_target;
 878
 879                 info_buf_source =
 880                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 881                 if (info_buf_source != NULL) {
 882                         info_buf_target = info_buf_source + 1;
 883                         if (pTcon->ses->capabilities & CAP_UNIX)
 884                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
 885                                         info_buf_source,
 886                                         cifs_sb_source->local_nls,
 887                                         cifs_sb_source->mnt_cifs_flags &
 888                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 889                         /* else rc is still EEXIST so will fall through to
 890                            unlink the target and retry rename */
 891                         if (rc == 0) {
 892                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
 893                                                 info_buf_target,
 894                                                 cifs_sb_target->local_nls,
 895                                                 /* remap based on source sb */
 896                                                 cifs_sb_source->mnt_cifs_flags &
 897                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 898                         }
 899                         if ((rc == 0) &&
 900                             (info_buf_source->UniqueId ==
 901                              info_buf_target->UniqueId)) {
 902                         /* do not rename since the files are hardlinked which
 903                            is a noop */
 904                         } else {
 905                         /* we either can not tell the files are hardlinked
 906                            (as with Windows servers) or files are not
 907                            hardlinked so delete the target manually before
 908                            renaming to follow POSIX rather than Windows
 909                            semantics */
 910                                 cifs_unlink(target_inode, target_direntry);
 911                                 rc = CIFSSMBRename(xid, pTcon, fromName,
 912                                                    toName,
 913                                                    cifs_sb_source->local_nls,
 914                                                    cifs_sb_source->mnt_cifs_flags
 915                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
 916                         }
 917                         kfree(info_buf_source);
 918                 } /* if we can not get memory just leave rc as EEXIST */
 919         }
 920
 921         if (rc) {
 922                 cFYI(1, ("rename rc %d", rc));
 923         }
 924
 925         if ((rc == -EIO) || (rc == -EEXIST)) {
 926                 int oplock = FALSE;
 927                 __u16 netfid;
 928
 929                 /* BB FIXME Is Generic Read correct for rename? */
 930                 /* if renaming directory - we should not say CREATE_NOT_DIR,
 931                    need to test renaming open directory, also GENERIC_READ
 932                    might not right be right access to request */
 933                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
 934                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
 935                                  cifs_sb_source->local_nls,
 936                                  cifs_sb_source->mnt_cifs_flags &
 937                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 938                 if (rc==0) {
 939                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
 940                                               cifs_sb_source->local_nls,
 941                                               cifs_sb_source->mnt_cifs_flags &
 942                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 943                         CIFSSMBClose(xid, pTcon, netfid);
 944                 }
 945         }
 946
 947 cifs_rename_exit:
 948         kfree(fromName);
 949         kfree(toName);
 950         FreeXid(xid);
 951         return rc;
 952 }
 953
 954 int cifs_revalidate(struct dentry *direntry)
 955 {
 956         int xid;
 957         int rc = 0;
 958         char *full_path;
 959         struct cifs_sb_info *cifs_sb;
 960         struct cifsInodeInfo *cifsInode;
 961         loff_t local_size;
 962         struct timespec local_mtime;
 963         int invalidate_inode = FALSE;
 964
 965         if (direntry->d_inode == NULL)
 966                 return -ENOENT;
 967
 968         cifsInode = CIFS_I(direntry->d_inode);
 969
 970         if (cifsInode == NULL)
 971                 return -ENOENT;
 972
 973         /* no sense revalidating inode info on file that no one can write */
 974         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
 975                 return rc;
 976
 977         xid = GetXid();
 978
 979         cifs_sb = CIFS_SB(direntry->d_sb);
 980
 981         /* can not safely grab the rename sem here if rename calls revalidate
 982            since that would deadlock */
 983         full_path = build_path_from_dentry(direntry);
 984         if (full_path == NULL) {
 985                 FreeXid(xid);
 986                 return -ENOMEM;
 987         }
 988         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
 989                  "jiffies %ld", full_path, direntry->d_inode,
 990                  direntry->d_inode->i_count.counter, direntry,
 991                  direntry->d_time, jiffies));
 992
 993         if (cifsInode->time == 0) {
 994                 /* was set to zero previously to force revalidate */
 995         } else if (time_before(jiffies, cifsInode->time + HZ) &&
 996                    lookupCacheEnabled) {
 997                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
 998                     (direntry->d_inode->i_nlink == 1)) {
 999                         kfree(full_path);
1000                         FreeXid(xid);
1001                         return rc;
1002                 } else {
1003                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1004                 }
1005         }
1006
1007         /* save mtime and size */
1008         local_mtime = direntry->d_inode->i_mtime;
1009         local_size = direntry->d_inode->i_size;
1010
1011         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1012                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1013                                               direntry->d_sb,xid);
1014                 if (rc) {
1015                         cFYI(1, ("error on getting revalidate info %d", rc));
1016 /*                      if (rc != -ENOENT)
1017                                 rc = 0; */      /* BB should we cache info on
1018                                                    certain errors? */
1019                 }
1020         } else {
1021                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1022                                          direntry->d_sb,xid);
1023                 if (rc) {
1024                         cFYI(1, ("error on getting revalidate info %d", rc));
1025 /*                      if (rc != -ENOENT)
1026                                 rc = 0; */      /* BB should we cache info on
1027                                                    certain errors? */
1028                 }
1029         }
1030         /* should we remap certain errors, access denied?, to zero */
1031
1032         /* if not oplocked, we invalidate inode pages if mtime or file size
1033            had changed on server */
1034
1035         if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1036             (local_size == direntry->d_inode->i_size)) {
1037                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1038         } else {
1039                 /* file may have changed on server */
1040                 if (cifsInode->clientCanCacheRead) {
1041                         /* no need to invalidate inode pages since we were the
1042                            only ones who could have modified the file and the
1043                            server copy is staler than ours */
1044                 } else {
1045                         invalidate_inode = TRUE;
1046                 }
1047         }
1048
1049         /* can not grab this sem since kernel filesys locking documentation
1050            indicates i_mutex may be taken by the kernel on lookup and rename
1051            which could deadlock if we grab the i_mutex here as well */
1052 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1053         /* need to write out dirty pages here  */
1054         if (direntry->d_inode->i_mapping) {
1055                 /* do we need to lock inode until after invalidate completes
1056                    below? */
1057                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1058         }
1059         if (invalidate_inode) {
1060         /* shrink_dcache not necessary now that cifs dentry ops
1061         are exported for negative dentries */
1062 /*              if(S_ISDIR(direntry->d_inode->i_mode))
1063                         shrink_dcache_parent(direntry); */
1064                 if (S_ISREG(direntry->d_inode->i_mode)) {
1065                         if (direntry->d_inode->i_mapping)
1066                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1067                         /* may eventually have to do this for open files too */
1068                         if (list_empty(&(cifsInode->openFileList))) {
1069                                 /* changed on server - flush read ahead pages */
1070                                 cFYI(1, ("Invalidating read ahead data on "
1071                                          "closed file"));
1072                                 invalidate_remote_inode(direntry->d_inode);
1073                         }
1074                 }
1075         }
1076 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1077
1078         kfree(full_path);
1079         FreeXid(xid);
1080         return rc;
1081 }
1082
1083 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1084         struct kstat *stat)
1085 {
1086         int err = cifs_revalidate(dentry);
1087         if (!err) {
1088                 generic_fillattr(dentry->d_inode, stat);
1089                 stat->blksize = CIFS_MAX_MSGSIZE;
1090         }
1091         return err;
1092 }
1093
1094 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1095 {
1096         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1097         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1098         struct page *page;
1099         char *kaddr;
1100         int rc = 0;
1101
1102         page = grab_cache_page(mapping, index);
1103         if (!page)
1104                 return -ENOMEM;
1105
1106         kaddr = kmap_atomic(page, KM_USER0);
1107         memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1108         flush_dcache_page(page);
1109         kunmap_atomic(kaddr, KM_USER0);
1110         unlock_page(page);
1111         page_cache_release(page);
1112         return rc;
1113 }
1114
1115 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1116 {
1117         int xid;
1118         struct cifs_sb_info *cifs_sb;
1119         struct cifsTconInfo *pTcon;
1120         char *full_path = NULL;
1121         int rc = -EACCES;
1122         struct cifsFileInfo *open_file = NULL;
1123         FILE_BASIC_INFO time_buf;
1124         int set_time = FALSE;
1125         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1126         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1127         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1128         struct cifsInodeInfo *cifsInode;
1129
1130         xid = GetXid();
1131
1132         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1133                  direntry->d_name.name, attrs->ia_valid));
1134
1135         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1136         pTcon = cifs_sb->tcon;
1137
1138         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1139                 /* check if we have permission to change attrs */
1140                 rc = inode_change_ok(direntry->d_inode, attrs);
1141                 if(rc < 0) {
1142                         FreeXid(xid);
1143                         return rc;
1144                 } else
1145                         rc = 0;
1146         }
1147
1148         full_path = build_path_from_dentry(direntry);
1149         if (full_path == NULL) {
1150                 FreeXid(xid);
1151                 return -ENOMEM;
1152         }
1153         cifsInode = CIFS_I(direntry->d_inode);
1154
1155         /* BB check if we need to refresh inode from server now ? BB */
1156
1157         /* need to flush data before changing file size on server */
1158         filemap_write_and_wait(direntry->d_inode->i_mapping);
1159
1160         if (attrs->ia_valid & ATTR_SIZE) {
1161                 /* To avoid spurious oplock breaks from server, in the case of
1162                    inodes that we already have open, avoid doing path based
1163                    setting of file size if we can do it by handle.
1164                    This keeps our caching token (oplock) and avoids timeouts
1165                    when the local oplock break takes longer to flush
1166                    writebehind data than the SMB timeout for the SetPathInfo
1167                    request would allow */
1168
1169                 open_file = find_writable_file(cifsInode);
1170                 if (open_file) {
1171                         __u16 nfid = open_file->netfid;
1172                         __u32 npid = open_file->pid;
1173                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1174                                                 nfid, npid, FALSE);
1175                         atomic_dec(&open_file->wrtPending);
1176                         cFYI(1,("SetFSize for attrs rc = %d", rc));
1177                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1178                                 int bytes_written;
1179                                 rc = CIFSSMBWrite(xid, pTcon,
1180                                                   nfid, 0, attrs->ia_size,
1181                                                   &bytes_written, NULL, NULL,
1182                                                   1 /* 45 seconds */);
1183                                 cFYI(1,("Wrt seteof rc %d", rc));
1184                         }
1185                 } else
1186                         rc = -EINVAL;
1187
1188                 if (rc != 0) {
1189                         /* Set file size by pathname rather than by handle
1190                            either because no valid, writeable file handle for
1191                            it was found or because there was an error setting
1192                            it by handle */
1193                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1194                                            attrs->ia_size, FALSE,
1195                                            cifs_sb->local_nls,
1196                                            cifs_sb->mnt_cifs_flags &
1197                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1198                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1199                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1200                                 __u16 netfid;
1201                                 int oplock = FALSE;
1202
1203                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1204                                         FILE_OPEN,
1205                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1206                                         CREATE_NOT_DIR, &netfid, &oplock,
1207                                         NULL, cifs_sb->local_nls,
1208                                         cifs_sb->mnt_cifs_flags &
1209                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1210                                 if (rc==0) {
1211                                         int bytes_written;
1212                                         rc = CIFSSMBWrite(xid, pTcon,
1213                                                         netfid, 0,
1214                                                         attrs->ia_size,
1215                                                         &bytes_written, NULL,
1216                                                         NULL, 1 /* 45 sec */);
1217                                         cFYI(1,("wrt seteof rc %d",rc));
1218                                         CIFSSMBClose(xid, pTcon, netfid);
1219                                 }
1220
1221                         }
1222                 }
1223
1224                 /* Server is ok setting allocation size implicitly - no need
1225                    to call:
1226                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1227                          cifs_sb->local_nls);
1228                    */
1229
1230                 if (rc == 0) {
1231                         rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1232                         cifs_truncate_page(direntry->d_inode->i_mapping,
1233                                            direntry->d_inode->i_size);
1234                 } else
1235                         goto cifs_setattr_exit;
1236         }
1237         if (attrs->ia_valid & ATTR_UID) {
1238                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1239                 uid = attrs->ia_uid;
1240         }
1241         if (attrs->ia_valid & ATTR_GID) {
1242                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1243                 gid = attrs->ia_gid;
1244         }
1245
1246         time_buf.Attributes = 0;
1247         if (attrs->ia_valid & ATTR_MODE) {
1248                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1249                 mode = attrs->ia_mode;
1250         }
1251
1252         if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1253             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1254                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1255                                          0 /* dev_t */, cifs_sb->local_nls,
1256                                          cifs_sb->mnt_cifs_flags &
1257                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1258         else if (attrs->ia_valid & ATTR_MODE) {
1259                 rc = 0;
1260                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1261                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1262                                 time_buf.Attributes =
1263                                         cpu_to_le32(cifsInode->cifsAttrs |
1264                                                     ATTR_READONLY);
1265                 } else if ((mode & S_IWUGO) == S_IWUGO) {
1266                         if (cifsInode->cifsAttrs & ATTR_READONLY)
1267                                 time_buf.Attributes =
1268                                         cpu_to_le32(cifsInode->cifsAttrs &
1269                                                     (~ATTR_READONLY));
1270                 }
1271                 /* BB to be implemented -
1272                    via Windows security descriptors or streams */
1273                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1274                                       cifs_sb->local_nls); */
1275         }
1276
1277         if (attrs->ia_valid & ATTR_ATIME) {
1278                 set_time = TRUE;
1279                 time_buf.LastAccessTime =
1280                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1281         } else
1282                 time_buf.LastAccessTime = 0;
1283
1284         if (attrs->ia_valid & ATTR_MTIME) {
1285                 set_time = TRUE;
1286                 time_buf.LastWriteTime =
1287                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1288         } else
1289                 time_buf.LastWriteTime = 0;
1290         /* Do not set ctime explicitly unless other time
1291            stamps are changed explicitly (i.e. by utime()
1292            since we would then have a mix of client and
1293            server times */
1294
1295         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1296                 set_time = TRUE;
1297                 /* Although Samba throws this field away
1298                 it may be useful to Windows - but we do
1299                 not want to set ctime unless some other
1300                 timestamp is changing */
1301                 cFYI(1, ("CIFS - CTIME changed"));
1302                 time_buf.ChangeTime =
1303                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1304         } else
1305                 time_buf.ChangeTime = 0;
1306
1307         if (set_time || time_buf.Attributes) {
1308                 time_buf.CreationTime = 0;      /* do not change */
1309                 /* In the future we should experiment - try setting timestamps
1310                    via Handle (SetFileInfo) instead of by path */
1311                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1312                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1313                                              cifs_sb->local_nls,
1314                                              cifs_sb->mnt_cifs_flags &
1315                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1316                 else
1317                         rc = -EOPNOTSUPP;
1318
1319                 if (rc == -EOPNOTSUPP) {
1320                         int oplock = FALSE;
1321                         __u16 netfid;
1322
1323                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1324                                  "times not supported by this server"));
1325                         /* BB we could scan to see if we already have it open
1326                            and pass in pid of opener to function */
1327                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1328                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1329                                          CREATE_NOT_DIR, &netfid, &oplock,
1330                                          NULL, cifs_sb->local_nls,
1331                                          cifs_sb->mnt_cifs_flags &
1332                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1333                         if (rc==0) {
1334                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1335                                                          netfid);
1336                                 CIFSSMBClose(xid, pTcon, netfid);
1337                         } else {
1338                         /* BB For even older servers we could convert time_buf
1339                            into old DOS style which uses two second
1340                            granularity */
1341
1342                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1343                                         &time_buf, cifs_sb->local_nls); */
1344                         }
1345                 }
1346                 /* Even if error on time set, no sense failing the call if
1347                 the server would set the time to a reasonable value anyway,
1348                 and this check ensures that we are not being called from
1349                 sys_utimes in which case we ought to fail the call back to
1350                 the user when the server rejects the call */
1351                 if((rc) && (attrs->ia_valid &&
1352                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1353                         rc = 0;
1354         }
1355
1356         /* do not need local check to inode_check_ok since the server does
1357            that */
1358         if (!rc)
1359                 rc = inode_setattr(direntry->d_inode, attrs);
1360 cifs_setattr_exit:
1361         kfree(full_path);
1362         FreeXid(xid);
1363         return rc;
1364 }
1365
1366 void cifs_delete_inode(struct inode *inode)
1367 {
1368         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1369         /* may have to add back in if and when safe distributed caching of
1370            directories added e.g. via FindNotify */
1371 }