fs/cifs/inode.c

   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32 int cifs_get_inode_info_unix(struct inode **pinode,
  33         const unsigned char *search_path, struct super_block *sb, int xid)
  34 {
  35         int rc = 0;
  36         FILE_UNIX_BASIC_INFO findData;
  37         struct cifsTconInfo *pTcon;
  38         struct inode *inode;
  39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  40         char *tmp_path;
  41
  42         pTcon = cifs_sb->tcon;
  43         cFYI(1, ("Getting info on %s", search_path));
  44         /* could have done a find first instead but this returns more info */
  45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  49                  sizeof(findData)); */
  50         if (rc) {
  51                 if (rc == -EREMOTE) {
  52                         tmp_path =
  53                             kmalloc(strnlen(pTcon->treeName,
  54                                             MAX_TREE_SIZE + 1) +
  55                                     strnlen(search_path, MAX_PATHCONF) + 1,
  56                                     GFP_KERNEL);
  57                         if (tmp_path == NULL)
  58                                 return -ENOMEM;
  59
  60                         /* have to skip first of the double backslash of
  61                            UNC name */
  62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  63                         strncat(tmp_path, search_path, MAX_PATHCONF);
  64                         rc = connect_to_dfs_path(xid, pTcon->ses,
  65                                                  /* treename + */ tmp_path,
  66                                                  cifs_sb->local_nls,
  67                                                  cifs_sb->mnt_cifs_flags &
  68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  69                         kfree(tmp_path);
  70
  71                         /* BB fix up inode etc. */
  72                 } else if (rc) {
  73                         return rc;
  74                 }
  75         } else {
  76                 struct cifsInodeInfo *cifsInfo;
  77                 __u32 type = le32_to_cpu(findData.Type);
  78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  80
  81                 /* get new inode */
  82                 if (*pinode == NULL) {
  83                         *pinode = new_inode(sb);
  84                         if (*pinode == NULL)
  85                                 return -ENOMEM;
  86                         /* Is an i_ino of zero legal? */
  87                         /* Are there sanity checks we can use to ensure that
  88                            the server is really filling in that field? */
  89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  90                                 (*pinode)->i_ino =
  91                                         (unsigned long)findData.UniqueId;
  92                         } /* note ino incremented to unique num in new_inode */
  93                         if (sb->s_flags & MS_NOATIME)
  94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
  95
  96                         insert_inode_hash(*pinode);
  97                 }
  98
  99                 inode = *pinode;
 100                 cifsInfo = CIFS_I(inode);
 101
 102                 cFYI(1, ("Old time %ld", cifsInfo->time));
 103                 cifsInfo->time = jiffies;
 104                 cFYI(1, ("New time %ld", cifsInfo->time));
 105                 /* this is ok to set on every inode revalidate */
 106                 atomic_set(&cifsInfo->inUse, 1);
 107
 108                 inode->i_atime =
 109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 110                 inode->i_mtime =
 111                     cifs_NTtimeToUnix(le64_to_cpu
 112                                 (findData.LastModificationTime));
 113                 inode->i_ctime =
 114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 115                 inode->i_mode = le64_to_cpu(findData.Permissions);
 116                 /* since we set the inode type below we need to mask off
 117                    to avoid strange results if bits set above */
 118                 inode->i_mode &= ~S_IFMT;
 119                 if (type == UNIX_FILE) {
 120                         inode->i_mode |= S_IFREG;
 121                 } else if (type == UNIX_SYMLINK) {
 122                         inode->i_mode |= S_IFLNK;
 123                 } else if (type == UNIX_DIR) {
 124                         inode->i_mode |= S_IFDIR;
 125                 } else if (type == UNIX_CHARDEV) {
 126                         inode->i_mode |= S_IFCHR;
 127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 129                 } else if (type == UNIX_BLOCKDEV) {
 130                         inode->i_mode |= S_IFBLK;
 131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 133                 } else if (type == UNIX_FIFO) {
 134                         inode->i_mode |= S_IFIFO;
 135                 } else if (type == UNIX_SOCKET) {
 136                         inode->i_mode |= S_IFSOCK;
 137                 } else {
 138                         /* safest to call it a file if we do not know */
 139                         inode->i_mode |= S_IFREG;
 140                         cFYI(1, ("unknown type %d", type));
 141                 }
 142
 143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 144                         inode->i_uid = cifs_sb->mnt_uid;
 145                 else
 146                         inode->i_uid = le64_to_cpu(findData.Uid);
 147
 148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 149                         inode->i_gid = cifs_sb->mnt_gid;
 150                 else
 151                         inode->i_gid = le64_to_cpu(findData.Gid);
 152
 153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 154
 155                 spin_lock(&inode->i_lock);
 156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 157                 /* can not safely change the file size here if the
 158                    client is writing to it due to potential races */
 159                         i_size_write(inode, end_of_file);
 160
 161                 /* blksize needs to be multiple of two. So safer to default to
 162                 blksize and blkbits set in superblock so 2**blkbits and blksize
 163                 will match rather than setting to:
 164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 165
 166                 /* This seems incredibly stupid but it turns out that i_blocks
 167                    is not related to (i_size / i_blksize), instead 512 byte size
 168                    is required for calculating num blocks */
 169
 170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 171                 /* for this calculation */
 172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 173                 }
 174                 spin_unlock(&inode->i_lock);
 175
 176                 if (num_of_bytes < end_of_file)
 177                         cFYI(1, ("allocation size less than end of file"));
 178                 cFYI(1, ("Size %ld and blocks %llu",
 179                         (unsigned long) inode->i_size,
 180                         (unsigned long long)inode->i_blocks));
 181                 if (S_ISREG(inode->i_mode)) {
 182                         cFYI(1, ("File inode"));
 183                         inode->i_op = &cifs_file_inode_ops;
 184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 186                                         inode->i_fop =
 187                                                 &cifs_file_direct_nobrl_ops;
 188                                 else
 189                                         inode->i_fop = &cifs_file_direct_ops;
 190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 191                                 inode->i_fop = &cifs_file_nobrl_ops;
 192                         else /* not direct, send byte range locks */
 193                                 inode->i_fop = &cifs_file_ops;
 194
 195                         /* check if server can support readpages */
 196                         if (pTcon->ses->server->maxBuf <
 197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 199                         else
 200                                 inode->i_data.a_ops = &cifs_addr_ops;
 201                 } else if (S_ISDIR(inode->i_mode)) {
 202                         cFYI(1, ("Directory inode"));
 203                         inode->i_op = &cifs_dir_inode_ops;
 204                         inode->i_fop = &cifs_dir_ops;
 205                 } else if (S_ISLNK(inode->i_mode)) {
 206                         cFYI(1, ("Symbolic Link inode"));
 207                         inode->i_op = &cifs_symlink_inode_ops;
 208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 209                 } else {
 210                         cFYI(1, ("Init special inode"));
 211                         init_special_inode(inode, inode->i_mode,
 212                                            inode->i_rdev);
 213                 }
 214         }
 215         return rc;
 216 }
 217
 218 static int decode_sfu_inode(struct inode *inode, __u64 size,
 219                             const unsigned char *path,
 220                             struct cifs_sb_info *cifs_sb, int xid)
 221 {
 222         int rc;
 223         int oplock = FALSE;
 224         __u16 netfid;
 225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 226         char buf[24];
 227         unsigned int bytes_read;
 228         char *pbuf;
 229
 230         pbuf = buf;
 231
 232         if (size == 0) {
 233                 inode->i_mode |= S_IFIFO;
 234                 return 0;
 235         } else if (size < 8) {
 236                 return -EINVAL;  /* EOPNOTSUPP? */
 237         }
 238
 239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 241                          cifs_sb->local_nls,
 242                          cifs_sb->mnt_cifs_flags &
 243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 244         if (rc == 0) {
 245                 int buf_type = CIFS_NO_BUFFER;
 246                         /* Read header */
 247                 rc = CIFSSMBRead(xid, pTcon,
 248                                  netfid,
 249                                  24 /* length */, 0 /* offset */,
 250                                  &bytes_read, &pbuf, &buf_type);
 251                 if ((rc == 0) && (bytes_read >= 8)) {
 252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 253                                 cFYI(1, ("Block device"));
 254                                 inode->i_mode |= S_IFBLK;
 255                                 if (bytes_read == 24) {
 256                                         /* we have enough to decode dev num */
 257                                         __u64 mjr; /* major */
 258                                         __u64 mnr; /* minor */
 259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 261                                         inode->i_rdev = MKDEV(mjr, mnr);
 262                                 }
 263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 264                                 cFYI(1, ("Char device"));
 265                                 inode->i_mode |= S_IFCHR;
 266                                 if (bytes_read == 24) {
 267                                         /* we have enough to decode dev num */
 268                                         __u64 mjr; /* major */
 269                                         __u64 mnr; /* minor */
 270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 272                                         inode->i_rdev = MKDEV(mjr, mnr);
 273                                 }
 274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 275                                 cFYI(1, ("Symlink"));
 276                                 inode->i_mode |= S_IFLNK;
 277                         } else {
 278                                 inode->i_mode |= S_IFREG; /* file? */
 279                                 rc = -EOPNOTSUPP;
 280                         }
 281                 } else {
 282                         inode->i_mode |= S_IFREG; /* then it is a file */
 283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 284                 }
 285                 CIFSSMBClose(xid, pTcon, netfid);
 286         }
 287         return rc;
 288 }
 289
 290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 291
 292 static int get_sfu_mode(struct inode *inode,
 293                         const unsigned char *path,
 294                         struct cifs_sb_info *cifs_sb, int xid)
 295 {
 296 #ifdef CONFIG_CIFS_XATTR
 297         ssize_t rc;
 298         char ea_value[4];
 299         __u32 mode;
 300
 301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 304         if (rc < 0)
 305                 return (int)rc;
 306         else if (rc > 3) {
 307                 mode = le32_to_cpu(*((__le32 *)ea_value));
 308                 inode->i_mode &= ~SFBITS_MASK;
 309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 311                 cFYI(1, ("special mode bits 0%o", mode));
 312                 return 0;
 313         } else {
 314                 return 0;
 315         }
 316 #else
 317         return -EOPNOTSUPP;
 318 #endif
 319 }
 320
 321 int cifs_get_inode_info(struct inode **pinode,
 322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 323         struct super_block *sb, int xid)
 324 {
 325         int rc = 0;
 326         struct cifsTconInfo *pTcon;
 327         struct inode *inode;
 328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 329         char *tmp_path;
 330         char *buf = NULL;
 331         int adjustTZ = FALSE;
 332
 333         pTcon = cifs_sb->tcon;
 334         cFYI(1, ("Getting info on %s", search_path));
 335
 336         if ((pfindData == NULL) && (*pinode != NULL)) {
 337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 338                         cFYI(1, ("No need to revalidate cached inode sizes"));
 339                         return rc;
 340                 }
 341         }
 342
 343         /* if file info not passed in then get it from server */
 344         if (pfindData == NULL) {
 345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 346                 if (buf == NULL)
 347                         return -ENOMEM;
 348                 pfindData = (FILE_ALL_INFO *)buf;
 349                 /* could do find first instead but this returns more info */
 350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 351                               0 /* not legacy */,
 352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 354                 /* BB optimize code so we do not make the above call
 355                 when server claims no NT SMB support and the above call
 356                 failed at least once - set flag in tcon or mount */
 357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 358                         rc = SMBQueryInformation(xid, pTcon, search_path,
 359                                         pfindData, cifs_sb->local_nls,
 360                                         cifs_sb->mnt_cifs_flags &
 361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 362                         adjustTZ = TRUE;
 363                 }
 364         }
 365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 366         if (rc) {
 367                 if (rc == -EREMOTE) {
 368                         tmp_path =
 369                             kmalloc(strnlen
 370                                     (pTcon->treeName,
 371                                      MAX_TREE_SIZE + 1) +
 372                                     strnlen(search_path, MAX_PATHCONF) + 1,
 373                                     GFP_KERNEL);
 374                         if (tmp_path == NULL) {
 375                                 kfree(buf);
 376                                 return -ENOMEM;
 377                         }
 378
 379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 380                         strncat(tmp_path, search_path, MAX_PATHCONF);
 381                         rc = connect_to_dfs_path(xid, pTcon->ses,
 382                                                  /* treename + */ tmp_path,
 383                                                  cifs_sb->local_nls,
 384                                                  cifs_sb->mnt_cifs_flags &
 385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 386                         kfree(tmp_path);
 387                         /* BB fix up inode etc. */
 388                 } else if (rc) {
 389                         kfree(buf);
 390                         return rc;
 391                 }
 392         } else {
 393                 struct cifsInodeInfo *cifsInfo;
 394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 395
 396                 /* get new inode */
 397                 if (*pinode == NULL) {
 398                         *pinode = new_inode(sb);
 399                         if (*pinode == NULL) {
 400                                 kfree(buf);
 401                                 return -ENOMEM;
 402                         }
 403                         /* Is an i_ino of zero legal? Can we use that to check
 404                            if the server supports returning inode numbers?  Are
 405                            there other sanity checks we can use to ensure that
 406                            the server is really filling in that field? */
 407
 408                         /* We can not use the IndexNumber field by default from
 409                            Windows or Samba (in ALL_INFO buf) but we can request
 410                            it explicitly.  It may not be unique presumably if
 411                            the server has multiple devices mounted under one
 412                            share */
 413
 414                         /* There may be higher info levels that work but are
 415                            there Windows server or network appliances for which
 416                            IndexNumber field is not guaranteed unique? */
 417
 418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 419                                 int rc1 = 0;
 420                                 __u64 inode_num;
 421
 422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 423                                         search_path, &inode_num,
 424                                         cifs_sb->local_nls,
 425                                         cifs_sb->mnt_cifs_flags &
 426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 427                                 if (rc1) {
 428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 430                                 } else /* do we need cast or hash to ino? */
 431                                         (*pinode)->i_ino = inode_num;
 432                         } /* else ino incremented to unique num in new_inode*/
 433                         if (sb->s_flags & MS_NOATIME)
 434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 435                         insert_inode_hash(*pinode);
 436                 }
 437                 inode = *pinode;
 438                 cifsInfo = CIFS_I(inode);
 439                 cifsInfo->cifsAttrs = attr;
 440                 cFYI(1, ("Old time %ld", cifsInfo->time));
 441                 cifsInfo->time = jiffies;
 442                 cFYI(1, ("New time %ld", cifsInfo->time));
 443
 444                 /* blksize needs to be multiple of two. So safer to default to
 445                 blksize and blkbits set in superblock so 2**blkbits and blksize
 446                 will match rather than setting to:
 447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 448
 449                 /* Linux can not store file creation time so ignore it */
 450                 if (pfindData->LastAccessTime)
 451                         inode->i_atime = cifs_NTtimeToUnix
 452                                 (le64_to_cpu(pfindData->LastAccessTime));
 453                 else /* do not need to use current_fs_time - time not stored */
 454                         inode->i_atime = CURRENT_TIME;
 455                 inode->i_mtime =
 456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 457                 inode->i_ctime =
 458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 459                 cFYI(0, ("Attributes came in as 0x%x", attr));
 460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 463                 }
 464
 465                 /* set default mode. will override for dirs below */
 466                 if (atomic_read(&cifsInfo->inUse) == 0)
 467                         /* new inode, can safely set these fields */
 468                         inode->i_mode = cifs_sb->mnt_file_mode;
 469                 else /* since we set the inode type below we need to mask off
 470                      to avoid strange results if type changes and both
 471                      get orred in */
 472                         inode->i_mode &= ~S_IFMT;
 473 /*              if (attr & ATTR_REPARSE)  */
 474                 /* We no longer handle these as symlinks because we could not
 475                    follow them due to the absolute path with drive letter */
 476                 if (attr & ATTR_DIRECTORY) {
 477                 /* override default perms since we do not do byte range locking
 478                    on dirs */
 479                         inode->i_mode = cifs_sb->mnt_dir_mode;
 480                         inode->i_mode |= S_IFDIR;
 481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 483                            /* No need to le64 convert size of zero */
 484                            (pfindData->EndOfFile == 0)) {
 485                         inode->i_mode = cifs_sb->mnt_file_mode;
 486                         inode->i_mode |= S_IFIFO;
 487 /* BB Finish for SFU style symlinks and devices */
 488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 490                         if (decode_sfu_inode(inode,
 491                                          le64_to_cpu(pfindData->EndOfFile),
 492                                          search_path,
 493                                          cifs_sb, xid)) {
 494                                 cFYI(1, ("Unrecognized sfu inode type"));
 495                         }
 496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
 497                 } else {
 498                         inode->i_mode |= S_IFREG;
 499                         /* treat the dos attribute of read-only as read-only
 500                            mode e.g. 555 */
 501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 502                                 inode->i_mode &= ~(S_IWUGO);
 503                         else if ((inode->i_mode & S_IWUGO) == 0)
 504                                 /* the ATTR_READONLY flag may have been */
 505                                 /* changed on server -- set any w bits  */
 506                                 /* allowed by mnt_file_mode             */
 507                                 inode->i_mode |= (S_IWUGO &
 508                                                   cifs_sb->mnt_file_mode);
 509                 /* BB add code here -
 510                    validate if device or weird share or device type? */
 511                 }
 512
 513                 spin_lock(&inode->i_lock);
 514                 if (is_size_safe_to_change(cifsInfo,
 515                                            le64_to_cpu(pfindData->EndOfFile))) {
 516                         /* can not safely shrink the file size here if the
 517                            client is writing to it due to potential races */
 518                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 519
 520                         /* 512 bytes (2**9) is the fake blocksize that must be
 521                            used for this calculation */
 522                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 523                                            pfindData->AllocationSize)) >> 9;
 524                 }
 525                 spin_unlock(&inode->i_lock);
 526
 527                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 528
 529                 /* BB fill in uid and gid here? with help from winbind?
 530                    or retrieve from NTFS stream extended attribute */
 531 #ifdef CONFIG_CIFS_EXPERIMENTAL
 532                 /* fill in 0777 bits from ACL */
 533                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 534                         cFYI(1, ("Getting mode bits from ACL"));
 535                         acl_to_uid_mode(inode, search_path);
 536                 }
 537 #endif
 538                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 539                         /* fill in remaining high mode bits e.g. SUID, VTX */
 540                         get_sfu_mode(inode, search_path, cifs_sb, xid);
 541                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 542                         inode->i_uid = cifs_sb->mnt_uid;
 543                         inode->i_gid = cifs_sb->mnt_gid;
 544                         /* set so we do not keep refreshing these fields with
 545                            bad data after user has changed them in memory */
 546                         atomic_set(&cifsInfo->inUse, 1);
 547                 }
 548
 549                 if (S_ISREG(inode->i_mode)) {
 550                         cFYI(1, ("File inode"));
 551                         inode->i_op = &cifs_file_inode_ops;
 552                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 553                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 554                                         inode->i_fop =
 555                                                 &cifs_file_direct_nobrl_ops;
 556                                 else
 557                                         inode->i_fop = &cifs_file_direct_ops;
 558                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 559                                 inode->i_fop = &cifs_file_nobrl_ops;
 560                         else /* not direct, send byte range locks */
 561                                 inode->i_fop = &cifs_file_ops;
 562
 563                         if (pTcon->ses->server->maxBuf <
 564                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 565                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 566                         else
 567                                 inode->i_data.a_ops = &cifs_addr_ops;
 568                 } else if (S_ISDIR(inode->i_mode)) {
 569                         cFYI(1, ("Directory inode"));
 570                         inode->i_op = &cifs_dir_inode_ops;
 571                         inode->i_fop = &cifs_dir_ops;
 572                 } else if (S_ISLNK(inode->i_mode)) {
 573                         cFYI(1, ("Symbolic Link inode"));
 574                         inode->i_op = &cifs_symlink_inode_ops;
 575                 } else {
 576                         init_special_inode(inode, inode->i_mode,
 577                                            inode->i_rdev);
 578                 }
 579         }
 580         kfree(buf);
 581         return rc;
 582 }
 583
 584 static const struct inode_operations cifs_ipc_inode_ops = {
 585         .lookup = cifs_lookup,
 586 };
 587
 588 /* gets root inode */
 589 void cifs_read_inode(struct inode *inode)
 590 {
 591         int xid, rc;
 592         struct cifs_sb_info *cifs_sb;
 593
 594         cifs_sb = CIFS_SB(inode->i_sb);
 595         xid = GetXid();
 596
 597         if (cifs_sb->tcon->unix_ext)
 598                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 599         else
 600                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 601         if (rc && cifs_sb->tcon->ipc) {
 602                 cFYI(1, ("ipc connection - fake read inode"));
 603                 inode->i_mode |= S_IFDIR;
 604                 inode->i_nlink = 2;
 605                 inode->i_op = &cifs_ipc_inode_ops;
 606                 inode->i_fop = &simple_dir_operations;
 607                 inode->i_uid = cifs_sb->mnt_uid;
 608                 inode->i_gid = cifs_sb->mnt_gid;
 609         }
 610
 611         /* can not call macro FreeXid here since in a void func */
 612         _FreeXid(xid);
 613 }
 614
 615 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 616 {
 617         int rc = 0;
 618         int xid;
 619         struct cifs_sb_info *cifs_sb;
 620         struct cifsTconInfo *pTcon;
 621         char *full_path = NULL;
 622         struct cifsInodeInfo *cifsInode;
 623         FILE_BASIC_INFO *pinfo_buf;
 624
 625         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 626
 627         xid = GetXid();
 628
 629         if (inode)
 630                 cifs_sb = CIFS_SB(inode->i_sb);
 631         else
 632                 cifs_sb = CIFS_SB(direntry->d_sb);
 633         pTcon = cifs_sb->tcon;
 634
 635         /* Unlink can be called from rename so we can not grab the sem here
 636            since we deadlock otherwise */
 637 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 638         full_path = build_path_from_dentry(direntry);
 639 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 640         if (full_path == NULL) {
 641                 FreeXid(xid);
 642                 return -ENOMEM;
 643         }
 644
 645         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 646                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 647                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 648                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 649                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 650                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 651                 cFYI(1, ("posix del rc %d", rc));
 652                 if ((rc == 0) || (rc == -ENOENT))
 653                         goto psx_del_no_retry;
 654         }
 655
 656         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 657                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 658 psx_del_no_retry:
 659         if (!rc) {
 660                 if (direntry->d_inode)
 661                         drop_nlink(direntry->d_inode);
 662         } else if (rc == -ENOENT) {
 663                 d_drop(direntry);
 664         } else if (rc == -ETXTBSY) {
 665                 int oplock = FALSE;
 666                 __u16 netfid;
 667
 668                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 669                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 670                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 671                                  cifs_sb->mnt_cifs_flags &
 672                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 673                 if (rc == 0) {
 674                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 675                                               cifs_sb->local_nls,
 676                                               cifs_sb->mnt_cifs_flags &
 677                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 678                         CIFSSMBClose(xid, pTcon, netfid);
 679                         if (direntry->d_inode)
 680                                 drop_nlink(direntry->d_inode);
 681                 }
 682         } else if (rc == -EACCES) {
 683                 /* try only if r/o attribute set in local lookup data? */
 684                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 685                 if (pinfo_buf) {
 686                         /* ATTRS set to normal clears r/o bit */
 687                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 688                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 689                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 690                                                      pinfo_buf,
 691                                                      cifs_sb->local_nls,
 692                                                      cifs_sb->mnt_cifs_flags &
 693                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 694                         else
 695                                 rc = -EOPNOTSUPP;
 696
 697                         if (rc == -EOPNOTSUPP) {
 698                                 int oplock = FALSE;
 699                                 __u16 netfid;
 700                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 701                                                           full_path,
 702                                                           (__u16)ATTR_NORMAL,
 703                                                           cifs_sb->local_nls);
 704                            For some strange reason it seems that NT4 eats the
 705                            old setattr call without actually setting the
 706                            attributes so on to the third attempted workaround
 707                            */
 708
 709                         /* BB could scan to see if we already have it open
 710                            and pass in pid of opener to function */
 711                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 712                                                  FILE_OPEN, SYNCHRONIZE |
 713                                                  FILE_WRITE_ATTRIBUTES, 0,
 714                                                  &netfid, &oplock, NULL,
 715                                                  cifs_sb->local_nls,
 716                                                  cifs_sb->mnt_cifs_flags &
 717                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 718                                 if (rc == 0) {
 719                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 720                                                                  pinfo_buf,
 721                                                                  netfid);
 722                                         CIFSSMBClose(xid, pTcon, netfid);
 723                                 }
 724                         }
 725                         kfree(pinfo_buf);
 726                 }
 727                 if (rc == 0) {
 728                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 729                                             cifs_sb->local_nls,
 730                                             cifs_sb->mnt_cifs_flags &
 731                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 732                         if (!rc) {
 733                                 if (direntry->d_inode)
 734                                         drop_nlink(direntry->d_inode);
 735                         } else if (rc == -ETXTBSY) {
 736                                 int oplock = FALSE;
 737                                 __u16 netfid;
 738
 739                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 740                                                  FILE_OPEN, DELETE,
 741                                                  CREATE_NOT_DIR |
 742                                                  CREATE_DELETE_ON_CLOSE,
 743                                                  &netfid, &oplock, NULL,
 744                                                  cifs_sb->local_nls,
 745                                                  cifs_sb->mnt_cifs_flags &
 746                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 747                                 if (rc == 0) {
 748                                         CIFSSMBRenameOpenFile(xid, pTcon,
 749                                                 netfid, NULL,
 750                                                 cifs_sb->local_nls,
 751                                                 cifs_sb->mnt_cifs_flags &
 752                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 753                                         CIFSSMBClose(xid, pTcon, netfid);
 754                                         if (direntry->d_inode)
 755                                                 drop_nlink(direntry->d_inode);
 756                                 }
 757                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 758                         }
 759                 }
 760         }
 761         if (direntry->d_inode) {
 762                 cifsInode = CIFS_I(direntry->d_inode);
 763                 cifsInode->time = 0;    /* will force revalidate to get info
 764                                            when needed */
 765                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 766         }
 767         if (inode) {
 768                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 769                 cifsInode = CIFS_I(inode);
 770                 cifsInode->time = 0;    /* force revalidate of dir as well */
 771         }
 772
 773         kfree(full_path);
 774         FreeXid(xid);
 775         return rc;
 776 }
 777
 778 static void posix_fill_in_inode(struct inode *tmp_inode,
 779         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 780 {
 781         loff_t local_size;
 782         struct timespec local_mtime;
 783
 784         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 785         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 786
 787         __u32 type = le32_to_cpu(pData->Type);
 788         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 789         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 790         cifsInfo->time = jiffies;
 791         atomic_inc(&cifsInfo->inUse);
 792
 793         /* save mtime and size */
 794         local_mtime = tmp_inode->i_mtime;
 795         local_size  = tmp_inode->i_size;
 796
 797         tmp_inode->i_atime =
 798             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 799         tmp_inode->i_mtime =
 800             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 801         tmp_inode->i_ctime =
 802             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 803
 804         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 805         /* since we set the inode type below we need to mask off type
 806            to avoid strange results if bits above were corrupt */
 807         tmp_inode->i_mode &= ~S_IFMT;
 808         if (type == UNIX_FILE) {
 809                 *pobject_type = DT_REG;
 810                 tmp_inode->i_mode |= S_IFREG;
 811         } else if (type == UNIX_SYMLINK) {
 812                 *pobject_type = DT_LNK;
 813                 tmp_inode->i_mode |= S_IFLNK;
 814         } else if (type == UNIX_DIR) {
 815                 *pobject_type = DT_DIR;
 816                 tmp_inode->i_mode |= S_IFDIR;
 817         } else if (type == UNIX_CHARDEV) {
 818                 *pobject_type = DT_CHR;
 819                 tmp_inode->i_mode |= S_IFCHR;
 820                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 821                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 822         } else if (type == UNIX_BLOCKDEV) {
 823                 *pobject_type = DT_BLK;
 824                 tmp_inode->i_mode |= S_IFBLK;
 825                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 826                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 827         } else if (type == UNIX_FIFO) {
 828                 *pobject_type = DT_FIFO;
 829                 tmp_inode->i_mode |= S_IFIFO;
 830         } else if (type == UNIX_SOCKET) {
 831                 *pobject_type = DT_SOCK;
 832                 tmp_inode->i_mode |= S_IFSOCK;
 833         } else {
 834                 /* safest to just call it a file */
 835                 *pobject_type = DT_REG;
 836                 tmp_inode->i_mode |= S_IFREG;
 837                 cFYI(1, ("unknown inode type %d", type));
 838         }
 839
 840 #ifdef CONFIG_CIFS_DEBUG2
 841         cFYI(1, ("object type: %d", type));
 842 #endif
 843         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 844         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 845         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 846
 847         spin_lock(&tmp_inode->i_lock);
 848         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 849                 /* can not safely change the file size here if the
 850                 client is writing to it due to potential races */
 851                 i_size_write(tmp_inode, end_of_file);
 852
 853         /* 512 bytes (2**9) is the fake blocksize that must be used */
 854         /* for this calculation, not the real blocksize */
 855                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 856         }
 857         spin_unlock(&tmp_inode->i_lock);
 858
 859         if (S_ISREG(tmp_inode->i_mode)) {
 860                 cFYI(1, ("File inode"));
 861                 tmp_inode->i_op = &cifs_file_inode_ops;
 862
 863                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 864                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 865                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 866                         else
 867                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 868
 869                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 870                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 871                 else
 872                         tmp_inode->i_fop = &cifs_file_ops;
 873
 874                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 875                    (cifs_sb->tcon->ses->server->maxBuf <
 876                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 877                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 878                 else
 879                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 880
 881                 if (isNewInode)
 882                         return; /* No sense invalidating pages for new inode
 883                                    since we we have not started caching
 884                                    readahead file data yet */
 885
 886                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 887                         (local_size == tmp_inode->i_size)) {
 888                         cFYI(1, ("inode exists but unchanged"));
 889                 } else {
 890                         /* file may have changed on server */
 891                         cFYI(1, ("invalidate inode, readdir detected change"));
 892                         invalidate_remote_inode(tmp_inode);
 893                 }
 894         } else if (S_ISDIR(tmp_inode->i_mode)) {
 895                 cFYI(1, ("Directory inode"));
 896                 tmp_inode->i_op = &cifs_dir_inode_ops;
 897                 tmp_inode->i_fop = &cifs_dir_ops;
 898         } else if (S_ISLNK(tmp_inode->i_mode)) {
 899                 cFYI(1, ("Symbolic Link inode"));
 900                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 901 /* tmp_inode->i_fop = *//* do not need to set to anything */
 902         } else {
 903                 cFYI(1, ("Special inode"));
 904                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 905                                    tmp_inode->i_rdev);
 906         }
 907 }
 908
 909 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 910 {
 911         int rc = 0;
 912         int xid;
 913         struct cifs_sb_info *cifs_sb;
 914         struct cifsTconInfo *pTcon;
 915         char *full_path = NULL;
 916         struct inode *newinode = NULL;
 917
 918         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 919
 920         xid = GetXid();
 921
 922         cifs_sb = CIFS_SB(inode->i_sb);
 923         pTcon = cifs_sb->tcon;
 924
 925         full_path = build_path_from_dentry(direntry);
 926         if (full_path == NULL) {
 927                 FreeXid(xid);
 928                 return -ENOMEM;
 929         }
 930
 931         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 932                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 933                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 934                 u32 oplock = 0;
 935                 FILE_UNIX_BASIC_INFO *pInfo =
 936                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 937                 if (pInfo == NULL) {
 938                         rc = -ENOMEM;
 939                         goto mkdir_out;
 940                 }
 941
 942                 mode &= ~current->fs->umask;
 943                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 944                                 mode, NULL /* netfid */, pInfo, &oplock,
 945                                 full_path, cifs_sb->local_nls,
 946                                 cifs_sb->mnt_cifs_flags &
 947                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 948                 if (rc == -EOPNOTSUPP) {
 949                         kfree(pInfo);
 950                         goto mkdir_retry_old;
 951                 } else if (rc) {
 952                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 953                         d_drop(direntry);
 954                 } else {
 955                         int obj_type;
 956                         if (pInfo->Type == cpu_to_le32(-1)) {
 957                                 /* no return info, go query for it */
 958                                 kfree(pInfo);
 959                                 goto mkdir_get_info;
 960                         }
 961 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 962         to set uid/gid */
 963                         inc_nlink(inode);
 964                         if (pTcon->nocase)
 965                                 direntry->d_op = &cifs_ci_dentry_ops;
 966                         else
 967                                 direntry->d_op = &cifs_dentry_ops;
 968
 969                         newinode = new_inode(inode->i_sb);
 970                         if (newinode == NULL) {
 971                                 kfree(pInfo);
 972                                 goto mkdir_get_info;
 973                         }
 974                         /* Is an i_ino of zero legal? */
 975                         /* Are there sanity checks we can use to ensure that
 976                            the server is really filling in that field? */
 977                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 978                                 newinode->i_ino =
 979                                         (unsigned long)pInfo->UniqueId;
 980                         } /* note ino incremented to unique num in new_inode */
 981                         if (inode->i_sb->s_flags & MS_NOATIME)
 982                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 983                         newinode->i_nlink = 2;
 984
 985                         insert_inode_hash(newinode);
 986                         d_instantiate(direntry, newinode);
 987
 988                         /* we already checked in POSIXCreate whether
 989                            frame was long enough */
 990                         posix_fill_in_inode(direntry->d_inode,
 991                                         pInfo, &obj_type, 1 /* NewInode */);
 992 #ifdef CONFIG_CIFS_DEBUG2
 993                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 994                                 direntry, direntry->d_name.name, newinode));
 995
 996                         if (newinode->i_nlink != 2)
 997                                 cFYI(1, ("unexpected number of links %d",
 998                                         newinode->i_nlink));
 999 #endif
1000                 }
1001                 kfree(pInfo);
1002                 goto mkdir_out;
1003         }
1004 mkdir_retry_old:
1005         /* BB add setting the equivalent of mode via CreateX w/ACLs */
1006         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1007                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1008         if (rc) {
1009                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1010                 d_drop(direntry);
1011         } else {
1012 mkdir_get_info:
1013                 inc_nlink(inode);
1014                 if (pTcon->unix_ext)
1015                         rc = cifs_get_inode_info_unix(&newinode, full_path,
1016                                                       inode->i_sb, xid);
1017                 else
1018                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
1019                                                  inode->i_sb, xid);
1020
1021                 if (pTcon->nocase)
1022                         direntry->d_op = &cifs_ci_dentry_ops;
1023                 else
1024                         direntry->d_op = &cifs_dentry_ops;
1025                 d_instantiate(direntry, newinode);
1026                  /* setting nlink not necessary except in cases where we
1027                   * failed to get it from the server or was set bogus */
1028                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1029                                 direntry->d_inode->i_nlink = 2;
1030                 if (pTcon->unix_ext) {
1031                         mode &= ~current->fs->umask;
1032                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1033                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1034                                                     mode,
1035                                                     (__u64)current->fsuid,
1036                                                     (__u64)current->fsgid,
1037                                                     0 /* dev_t */,
1038                                                     cifs_sb->local_nls,
1039                                                     cifs_sb->mnt_cifs_flags &
1040                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1041                         } else {
1042                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1043                                                     mode, (__u64)-1,
1044                                                     (__u64)-1, 0 /* dev_t */,
1045                                                     cifs_sb->local_nls,
1046                                                     cifs_sb->mnt_cifs_flags &
1047                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1048                         }
1049                 } else {
1050                         /* BB to be implemented via Windows secrty descriptors
1051                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1052                                                  -1, -1, local_nls); */
1053                         if (direntry->d_inode) {
1054                                 direntry->d_inode->i_mode = mode;
1055                                 direntry->d_inode->i_mode |= S_IFDIR;
1056                                 if (cifs_sb->mnt_cifs_flags &
1057                                      CIFS_MOUNT_SET_UID) {
1058                                         direntry->d_inode->i_uid =
1059                                                 current->fsuid;
1060                                         direntry->d_inode->i_gid =
1061                                                 current->fsgid;
1062                                 }
1063                         }
1064                 }
1065         }
1066 mkdir_out:
1067         kfree(full_path);
1068         FreeXid(xid);
1069         return rc;
1070 }
1071
1072 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1073 {
1074         int rc = 0;
1075         int xid;
1076         struct cifs_sb_info *cifs_sb;
1077         struct cifsTconInfo *pTcon;
1078         char *full_path = NULL;
1079         struct cifsInodeInfo *cifsInode;
1080
1081         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1082
1083         xid = GetXid();
1084
1085         cifs_sb = CIFS_SB(inode->i_sb);
1086         pTcon = cifs_sb->tcon;
1087
1088         full_path = build_path_from_dentry(direntry);
1089         if (full_path == NULL) {
1090                 FreeXid(xid);
1091                 return -ENOMEM;
1092         }
1093
1094         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1095                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1096
1097         if (!rc) {
1098                 drop_nlink(inode);
1099                 spin_lock(&direntry->d_inode->i_lock);
1100                 i_size_write(direntry->d_inode, 0);
1101                 clear_nlink(direntry->d_inode);
1102                 spin_unlock(&direntry->d_inode->i_lock);
1103         }
1104
1105         cifsInode = CIFS_I(direntry->d_inode);
1106         cifsInode->time = 0;    /* force revalidate to go get info when
1107                                    needed */
1108         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1109                 current_fs_time(inode->i_sb);
1110
1111         kfree(full_path);
1112         FreeXid(xid);
1113         return rc;
1114 }
1115
1116 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1117         struct inode *target_inode, struct dentry *target_direntry)
1118 {
1119         char *fromName;
1120         char *toName;
1121         struct cifs_sb_info *cifs_sb_source;
1122         struct cifs_sb_info *cifs_sb_target;
1123         struct cifsTconInfo *pTcon;
1124         int xid;
1125         int rc = 0;
1126
1127         xid = GetXid();
1128
1129         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1130         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1131         pTcon = cifs_sb_source->tcon;
1132
1133         if (pTcon != cifs_sb_target->tcon) {
1134                 FreeXid(xid);
1135                 return -EXDEV;  /* BB actually could be allowed if same server,
1136                                    but different share.
1137                                    Might eventually add support for this */
1138         }
1139
1140         /* we already  have the rename sem so we do not need to grab it again
1141            here to protect the path integrity */
1142         fromName = build_path_from_dentry(source_direntry);
1143         toName = build_path_from_dentry(target_direntry);
1144         if ((fromName == NULL) || (toName == NULL)) {
1145                 rc = -ENOMEM;
1146                 goto cifs_rename_exit;
1147         }
1148
1149         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1150                            cifs_sb_source->local_nls,
1151                            cifs_sb_source->mnt_cifs_flags &
1152                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1153         if (rc == -EEXIST) {
1154                 /* check if they are the same file because rename of hardlinked
1155                    files is a noop */
1156                 FILE_UNIX_BASIC_INFO *info_buf_source;
1157                 FILE_UNIX_BASIC_INFO *info_buf_target;
1158
1159                 info_buf_source =
1160                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1161                 if (info_buf_source != NULL) {
1162                         info_buf_target = info_buf_source + 1;
1163                         if (pTcon->unix_ext)
1164                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1165                                         info_buf_source,
1166                                         cifs_sb_source->local_nls,
1167                                         cifs_sb_source->mnt_cifs_flags &
1168                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1169                         /* else rc is still EEXIST so will fall through to
1170                            unlink the target and retry rename */
1171                         if (rc == 0) {
1172                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1173                                                 info_buf_target,
1174                                                 cifs_sb_target->local_nls,
1175                                                 /* remap based on source sb */
1176                                                 cifs_sb_source->mnt_cifs_flags &
1177                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1178                         }
1179                         if ((rc == 0) &&
1180                             (info_buf_source->UniqueId ==
1181                              info_buf_target->UniqueId)) {
1182                         /* do not rename since the files are hardlinked which
1183                            is a noop */
1184                         } else {
1185                         /* we either can not tell the files are hardlinked
1186                            (as with Windows servers) or files are not
1187                            hardlinked so delete the target manually before
1188                            renaming to follow POSIX rather than Windows
1189                            semantics */
1190                                 cifs_unlink(target_inode, target_direntry);
1191                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1192                                                    toName,
1193                                                    cifs_sb_source->local_nls,
1194                                                    cifs_sb_source->mnt_cifs_flags
1195                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1196                         }
1197                         kfree(info_buf_source);
1198                 } /* if we can not get memory just leave rc as EEXIST */
1199         }
1200
1201         if (rc) {
1202                 cFYI(1, ("rename rc %d", rc));
1203         }
1204
1205         if ((rc == -EIO) || (rc == -EEXIST)) {
1206                 int oplock = FALSE;
1207                 __u16 netfid;
1208
1209                 /* BB FIXME Is Generic Read correct for rename? */
1210                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1211                    need to test renaming open directory, also GENERIC_READ
1212                    might not right be right access to request */
1213                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1214                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1215                                  cifs_sb_source->local_nls,
1216                                  cifs_sb_source->mnt_cifs_flags &
1217                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1218                 if (rc == 0) {
1219                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1220                                               cifs_sb_source->local_nls,
1221                                               cifs_sb_source->mnt_cifs_flags &
1222                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1223                         CIFSSMBClose(xid, pTcon, netfid);
1224                 }
1225         }
1226
1227 cifs_rename_exit:
1228         kfree(fromName);
1229         kfree(toName);
1230         FreeXid(xid);
1231         return rc;
1232 }
1233
1234 int cifs_revalidate(struct dentry *direntry)
1235 {
1236         int xid;
1237         int rc = 0, wbrc = 0;
1238         char *full_path;
1239         struct cifs_sb_info *cifs_sb;
1240         struct cifsInodeInfo *cifsInode;
1241         loff_t local_size;
1242         struct timespec local_mtime;
1243         int invalidate_inode = FALSE;
1244
1245         if (direntry->d_inode == NULL)
1246                 return -ENOENT;
1247
1248         cifsInode = CIFS_I(direntry->d_inode);
1249
1250         if (cifsInode == NULL)
1251                 return -ENOENT;
1252
1253         /* no sense revalidating inode info on file that no one can write */
1254         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1255                 return rc;
1256
1257         xid = GetXid();
1258
1259         cifs_sb = CIFS_SB(direntry->d_sb);
1260
1261         /* can not safely grab the rename sem here if rename calls revalidate
1262            since that would deadlock */
1263         full_path = build_path_from_dentry(direntry);
1264         if (full_path == NULL) {
1265                 FreeXid(xid);
1266                 return -ENOMEM;
1267         }
1268         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1269                  "jiffies %ld", full_path, direntry->d_inode,
1270                  direntry->d_inode->i_count.counter, direntry,
1271                  direntry->d_time, jiffies));
1272
1273         if (cifsInode->time == 0) {
1274                 /* was set to zero previously to force revalidate */
1275         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1276                    lookupCacheEnabled) {
1277                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1278                     (direntry->d_inode->i_nlink == 1)) {
1279                         kfree(full_path);
1280                         FreeXid(xid);
1281                         return rc;
1282                 } else {
1283                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1284                 }
1285         }
1286
1287         /* save mtime and size */
1288         local_mtime = direntry->d_inode->i_mtime;
1289         local_size = direntry->d_inode->i_size;
1290
1291         if (cifs_sb->tcon->unix_ext) {
1292                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1293                                               direntry->d_sb, xid);
1294                 if (rc) {
1295                         cFYI(1, ("error on getting revalidate info %d", rc));
1296 /*                      if (rc != -ENOENT)
1297                                 rc = 0; */      /* BB should we cache info on
1298                                                    certain errors? */
1299                 }
1300         } else {
1301                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1302                                          direntry->d_sb, xid);
1303                 if (rc) {
1304                         cFYI(1, ("error on getting revalidate info %d", rc));
1305 /*                      if (rc != -ENOENT)
1306                                 rc = 0; */      /* BB should we cache info on
1307                                                    certain errors? */
1308                 }
1309         }
1310         /* should we remap certain errors, access denied?, to zero */
1311
1312         /* if not oplocked, we invalidate inode pages if mtime or file size
1313            had changed on server */
1314
1315         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1316             (local_size == direntry->d_inode->i_size)) {
1317                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1318         } else {
1319                 /* file may have changed on server */
1320                 if (cifsInode->clientCanCacheRead) {
1321                         /* no need to invalidate inode pages since we were the
1322                            only ones who could have modified the file and the
1323                            server copy is staler than ours */
1324                 } else {
1325                         invalidate_inode = TRUE;
1326                 }
1327         }
1328
1329         /* can not grab this sem since kernel filesys locking documentation
1330            indicates i_mutex may be taken by the kernel on lookup and rename
1331            which could deadlock if we grab the i_mutex here as well */
1332 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1333         /* need to write out dirty pages here  */
1334         if (direntry->d_inode->i_mapping) {
1335                 /* do we need to lock inode until after invalidate completes
1336                    below? */
1337                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1338                 if (wbrc)
1339                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1340         }
1341         if (invalidate_inode) {
1342         /* shrink_dcache not necessary now that cifs dentry ops
1343         are exported for negative dentries */
1344 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1345                         shrink_dcache_parent(direntry); */
1346                 if (S_ISREG(direntry->d_inode->i_mode)) {
1347                         if (direntry->d_inode->i_mapping)
1348                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1349                                 if (wbrc)
1350                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1351                         /* may eventually have to do this for open files too */
1352                         if (list_empty(&(cifsInode->openFileList))) {
1353                                 /* changed on server - flush read ahead pages */
1354                                 cFYI(1, ("Invalidating read ahead data on "
1355                                          "closed file"));
1356                                 invalidate_remote_inode(direntry->d_inode);
1357                         }
1358                 }
1359         }
1360 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1361
1362         kfree(full_path);
1363         FreeXid(xid);
1364         return rc;
1365 }
1366
1367 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1368         struct kstat *stat)
1369 {
1370         int err = cifs_revalidate(dentry);
1371         if (!err) {
1372                 generic_fillattr(dentry->d_inode, stat);
1373                 stat->blksize = CIFS_MAX_MSGSIZE;
1374         }
1375         return err;
1376 }
1377
1378 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1379 {
1380         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1381         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1382         struct page *page;
1383         int rc = 0;
1384
1385         page = grab_cache_page(mapping, index);
1386         if (!page)
1387                 return -ENOMEM;
1388
1389         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1390         unlock_page(page);
1391         page_cache_release(page);
1392         return rc;
1393 }
1394
1395 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1396 {
1397         struct address_space *mapping = inode->i_mapping;
1398         unsigned long limit;
1399
1400         spin_lock(&inode->i_lock);
1401         if (inode->i_size < offset)
1402                 goto do_expand;
1403         /*
1404          * truncation of in-use swapfiles is disallowed - it would cause
1405          * subsequent swapout to scribble on the now-freed blocks.
1406          */
1407         if (IS_SWAPFILE(inode)) {
1408                 spin_unlock(&inode->i_lock);
1409                 goto out_busy;
1410         }
1411         i_size_write(inode, offset);
1412         spin_unlock(&inode->i_lock);
1413         /*
1414          * unmap_mapping_range is called twice, first simply for efficiency
1415          * so that truncate_inode_pages does fewer single-page unmaps. However
1416          * after this first call, and before truncate_inode_pages finishes,
1417          * it is possible for private pages to be COWed, which remain after
1418          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1419          * call must be made for correctness.
1420          */
1421         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1422         truncate_inode_pages(mapping, offset);
1423         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1424         goto out_truncate;
1425
1426 do_expand:
1427         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1428         if (limit != RLIM_INFINITY && offset > limit) {
1429                 spin_unlock(&inode->i_lock);
1430                 goto out_sig;
1431         }
1432         if (offset > inode->i_sb->s_maxbytes) {
1433                 spin_unlock(&inode->i_lock);
1434                 goto out_big;
1435         }
1436         i_size_write(inode, offset);
1437         spin_unlock(&inode->i_lock);
1438 out_truncate:
1439         if (inode->i_op && inode->i_op->truncate)
1440                 inode->i_op->truncate(inode);
1441         return 0;
1442 out_sig:
1443         send_sig(SIGXFSZ, current, 0);
1444 out_big:
1445         return -EFBIG;
1446 out_busy:
1447         return -ETXTBSY;
1448 }
1449
1450 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1451 {
1452         int xid;
1453         struct cifs_sb_info *cifs_sb;
1454         struct cifsTconInfo *pTcon;
1455         char *full_path = NULL;
1456         int rc = -EACCES;
1457         struct cifsFileInfo *open_file = NULL;
1458         FILE_BASIC_INFO time_buf;
1459         int set_time = FALSE;
1460         int set_dosattr = FALSE;
1461         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1462         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1463         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1464         struct cifsInodeInfo *cifsInode;
1465
1466         xid = GetXid();
1467
1468         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1469                  direntry->d_name.name, attrs->ia_valid));
1470
1471         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1472         pTcon = cifs_sb->tcon;
1473
1474         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1475                 /* check if we have permission to change attrs */
1476                 rc = inode_change_ok(direntry->d_inode, attrs);
1477                 if (rc < 0) {
1478                         FreeXid(xid);
1479                         return rc;
1480                 } else
1481                         rc = 0;
1482         }
1483
1484         full_path = build_path_from_dentry(direntry);
1485         if (full_path == NULL) {
1486                 FreeXid(xid);
1487                 return -ENOMEM;
1488         }
1489         cifsInode = CIFS_I(direntry->d_inode);
1490
1491         /* BB check if we need to refresh inode from server now ? BB */
1492
1493         if (attrs->ia_valid & ATTR_SIZE) {
1494                 /*
1495                    Flush data before changing file size on server. If the
1496                    flush returns error, store it to report later and continue.
1497                    BB: This should be smarter. Why bother flushing pages that
1498                    will be truncated anyway? Also, should we error out here if
1499                    the flush returns error?
1500                  */
1501                 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1502                 if (rc != 0) {
1503                         CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1504                         rc = 0;
1505                 }
1506
1507                 /* To avoid spurious oplock breaks from server, in the case of
1508                    inodes that we already have open, avoid doing path based
1509                    setting of file size if we can do it by handle.
1510                    This keeps our caching token (oplock) and avoids timeouts
1511                    when the local oplock break takes longer to flush
1512                    writebehind data than the SMB timeout for the SetPathInfo
1513                    request would allow */
1514
1515                 open_file = find_writable_file(cifsInode);
1516                 if (open_file) {
1517                         __u16 nfid = open_file->netfid;
1518                         __u32 npid = open_file->pid;
1519                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1520                                                 nfid, npid, FALSE);
1521                         atomic_dec(&open_file->wrtPending);
1522                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1523                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1524                                 unsigned int bytes_written;
1525                                 rc = CIFSSMBWrite(xid, pTcon,
1526                                                   nfid, 0, attrs->ia_size,
1527                                                   &bytes_written, NULL, NULL,
1528                                                   1 /* 45 seconds */);
1529                                 cFYI(1, ("Wrt seteof rc %d", rc));
1530                         }
1531                 } else
1532                         rc = -EINVAL;
1533
1534                 if (rc != 0) {
1535                         /* Set file size by pathname rather than by handle
1536                            either because no valid, writeable file handle for
1537                            it was found or because there was an error setting
1538                            it by handle */
1539                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1540                                            attrs->ia_size, FALSE,
1541                                            cifs_sb->local_nls,
1542                                            cifs_sb->mnt_cifs_flags &
1543                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1544                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1545                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1546                                 __u16 netfid;
1547                                 int oplock = FALSE;
1548
1549                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1550                                         FILE_OPEN,
1551                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1552                                         CREATE_NOT_DIR, &netfid, &oplock,
1553                                         NULL, cifs_sb->local_nls,
1554                                         cifs_sb->mnt_cifs_flags &
1555                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1556                                 if (rc == 0) {
1557                                         unsigned int bytes_written;
1558                                         rc = CIFSSMBWrite(xid, pTcon,
1559                                                         netfid, 0,
1560                                                         attrs->ia_size,
1561                                                         &bytes_written, NULL,
1562                                                         NULL, 1 /* 45 sec */);
1563                                         cFYI(1, ("wrt seteof rc %d", rc));
1564                                         CIFSSMBClose(xid, pTcon, netfid);
1565                                 }
1566
1567                         }
1568                 }
1569
1570                 /* Server is ok setting allocation size implicitly - no need
1571                    to call:
1572                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1573                          cifs_sb->local_nls);
1574                    */
1575
1576                 if (rc == 0) {
1577                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1578                         cifs_truncate_page(direntry->d_inode->i_mapping,
1579                                            direntry->d_inode->i_size);
1580                 } else
1581                         goto cifs_setattr_exit;
1582         }
1583         if (attrs->ia_valid & ATTR_UID) {
1584                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1585                 uid = attrs->ia_uid;
1586         }
1587         if (attrs->ia_valid & ATTR_GID) {
1588                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1589                 gid = attrs->ia_gid;
1590         }
1591
1592         time_buf.Attributes = 0;
1593
1594         /* skip mode change if it's just for clearing setuid/setgid */
1595         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1596                 attrs->ia_valid &= ~ATTR_MODE;
1597
1598         if (attrs->ia_valid & ATTR_MODE) {
1599                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1600                 mode = attrs->ia_mode;
1601         }
1602
1603         if ((pTcon->unix_ext)
1604             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1605                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1606                                          0 /* dev_t */, cifs_sb->local_nls,
1607                                          cifs_sb->mnt_cifs_flags &
1608                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1609         else if (attrs->ia_valid & ATTR_MODE) {
1610                 rc = 0;
1611 #ifdef CONFIG_CIFS_EXPERIMENTAL
1612                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1613                         rc = mode_to_acl(direntry->d_inode, full_path, mode);
1614                 else if ((mode & S_IWUGO) == 0) {
1615 #else
1616                 if ((mode & S_IWUGO) == 0) {
1617 #endif
1618                         /* not writeable */
1619                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1620                                 set_dosattr = TRUE;
1621                                 time_buf.Attributes =
1622                                         cpu_to_le32(cifsInode->cifsAttrs |
1623                                                     ATTR_READONLY);
1624                         }
1625                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1626                         /* If file is readonly on server, we would
1627                         not be able to write to it - so if any write
1628                         bit is enabled for user or group or other we
1629                         need to at least try to remove r/o dos attr */
1630                         set_dosattr = TRUE;
1631                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1632                                             (~ATTR_READONLY));
1633                         /* Windows ignores set to zero */
1634                         if (time_buf.Attributes == 0)
1635                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1636                 }
1637 #ifdef CONFIG_CIFS_EXPERIMENTAL
1638                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1639                         mode_to_acl(direntry->d_inode, full_path, mode);
1640 #endif
1641         }
1642
1643         if (attrs->ia_valid & ATTR_ATIME) {
1644                 set_time = TRUE;
1645                 time_buf.LastAccessTime =
1646                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1647         } else
1648                 time_buf.LastAccessTime = 0;
1649
1650         if (attrs->ia_valid & ATTR_MTIME) {
1651                 set_time = TRUE;
1652                 time_buf.LastWriteTime =
1653                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1654         } else
1655                 time_buf.LastWriteTime = 0;
1656         /* Do not set ctime explicitly unless other time
1657            stamps are changed explicitly (i.e. by utime()
1658            since we would then have a mix of client and
1659            server times */
1660
1661         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1662                 set_time = TRUE;
1663                 /* Although Samba throws this field away
1664                 it may be useful to Windows - but we do
1665                 not want to set ctime unless some other
1666                 timestamp is changing */
1667                 cFYI(1, ("CIFS - CTIME changed"));
1668                 time_buf.ChangeTime =
1669                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1670         } else
1671                 time_buf.ChangeTime = 0;
1672
1673         if (set_time || set_dosattr) {
1674                 time_buf.CreationTime = 0;      /* do not change */
1675                 /* In the future we should experiment - try setting timestamps
1676                    via Handle (SetFileInfo) instead of by path */
1677                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1678                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1679                                              cifs_sb->local_nls,
1680                                              cifs_sb->mnt_cifs_flags &
1681                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1682                 else
1683                         rc = -EOPNOTSUPP;
1684
1685                 if (rc == -EOPNOTSUPP) {
1686                         int oplock = FALSE;
1687                         __u16 netfid;
1688
1689                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1690                                  "times not supported by this server"));
1691                         /* BB we could scan to see if we already have it open
1692                            and pass in pid of opener to function */
1693                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1694                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1695                                          CREATE_NOT_DIR, &netfid, &oplock,
1696                                          NULL, cifs_sb->local_nls,
1697                                          cifs_sb->mnt_cifs_flags &
1698                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1699                         if (rc == 0) {
1700                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1701                                                          netfid);
1702                                 CIFSSMBClose(xid, pTcon, netfid);
1703                         } else {
1704                         /* BB For even older servers we could convert time_buf
1705                            into old DOS style which uses two second
1706                            granularity */
1707
1708                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1709                                         &time_buf, cifs_sb->local_nls); */
1710                         }
1711                 }
1712                 /* Even if error on time set, no sense failing the call if
1713                 the server would set the time to a reasonable value anyway,
1714                 and this check ensures that we are not being called from
1715                 sys_utimes in which case we ought to fail the call back to
1716                 the user when the server rejects the call */
1717                 if ((rc) && (attrs->ia_valid &
1718                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1719                         rc = 0;
1720         }
1721
1722         /* do not need local check to inode_check_ok since the server does
1723            that */
1724         if (!rc)
1725                 rc = inode_setattr(direntry->d_inode, attrs);
1726 cifs_setattr_exit:
1727         kfree(full_path);
1728         FreeXid(xid);
1729         return rc;
1730 }
1731
1732 #if 0
1733 void cifs_delete_inode(struct inode *inode)
1734 {
1735         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1736         /* may have to add back in if and when safe distributed caching of
1737            directories added e.g. via FindNotify */
1738 }
1739 #endif