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   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32 int cifs_get_inode_info_unix(struct inode **pinode,
  33         const unsigned char *search_path, struct super_block *sb, int xid)
  34 {
  35         int rc = 0;
  36         FILE_UNIX_BASIC_INFO findData;
  37         struct cifsTconInfo *pTcon;
  38         struct inode *inode;
  39         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  40         char *tmp_path;
  41
  42         pTcon = cifs_sb->tcon;
  43         cFYI(1, ("Getting info on %s", search_path));
  44         /* could have done a find first instead but this returns more info */
  45         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  46                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  47                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  48 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  49                  sizeof(findData)); */
  50         if (rc) {
  51                 if (rc == -EREMOTE) {
  52                         tmp_path =
  53                             kmalloc(strnlen(pTcon->treeName,
  54                                             MAX_TREE_SIZE + 1) +
  55                                     strnlen(search_path, MAX_PATHCONF) + 1,
  56                                     GFP_KERNEL);
  57                         if (tmp_path == NULL)
  58                                 return -ENOMEM;
  59
  60                         /* have to skip first of the double backslash of
  61                            UNC name */
  62                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  63                         strncat(tmp_path, search_path, MAX_PATHCONF);
  64                         rc = connect_to_dfs_path(xid, pTcon->ses,
  65                                                  /* treename + */ tmp_path,
  66                                                  cifs_sb->local_nls,
  67                                                  cifs_sb->mnt_cifs_flags &
  68                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  69                         kfree(tmp_path);
  70
  71                         /* BB fix up inode etc. */
  72                 } else if (rc) {
  73                         return rc;
  74                 }
  75         } else {
  76                 struct cifsInodeInfo *cifsInfo;
  77                 __u32 type = le32_to_cpu(findData.Type);
  78                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  79                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  80
  81                 /* get new inode */
  82                 if (*pinode == NULL) {
  83                         *pinode = new_inode(sb);
  84                         if (*pinode == NULL)
  85                                 return -ENOMEM;
  86                         /* Is an i_ino of zero legal? */
  87                         /* Are there sanity checks we can use to ensure that
  88                            the server is really filling in that field? */
  89                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  90                                 (*pinode)->i_ino =
  91                                         (unsigned long)findData.UniqueId;
  92                         } /* note ino incremented to unique num in new_inode */
  93                         if (sb->s_flags & MS_NOATIME)
  94                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
  95
  96                         insert_inode_hash(*pinode);
  97                 }
  98
  99                 inode = *pinode;
 100                 cifsInfo = CIFS_I(inode);
 101
 102                 cFYI(1, ("Old time %ld", cifsInfo->time));
 103                 cifsInfo->time = jiffies;
 104                 cFYI(1, ("New time %ld", cifsInfo->time));
 105                 /* this is ok to set on every inode revalidate */
 106                 atomic_set(&cifsInfo->inUse, 1);
 107
 108                 inode->i_atime =
 109                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 110                 inode->i_mtime =
 111                     cifs_NTtimeToUnix(le64_to_cpu
 112                                 (findData.LastModificationTime));
 113                 inode->i_ctime =
 114                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 115                 inode->i_mode = le64_to_cpu(findData.Permissions);
 116                 /* since we set the inode type below we need to mask off
 117                    to avoid strange results if bits set above */
 118                 inode->i_mode &= ~S_IFMT;
 119                 if (type == UNIX_FILE) {
 120                         inode->i_mode |= S_IFREG;
 121                 } else if (type == UNIX_SYMLINK) {
 122                         inode->i_mode |= S_IFLNK;
 123                 } else if (type == UNIX_DIR) {
 124                         inode->i_mode |= S_IFDIR;
 125                 } else if (type == UNIX_CHARDEV) {
 126                         inode->i_mode |= S_IFCHR;
 127                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 128                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 129                 } else if (type == UNIX_BLOCKDEV) {
 130                         inode->i_mode |= S_IFBLK;
 131                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 132                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 133                 } else if (type == UNIX_FIFO) {
 134                         inode->i_mode |= S_IFIFO;
 135                 } else if (type == UNIX_SOCKET) {
 136                         inode->i_mode |= S_IFSOCK;
 137                 } else {
 138                         /* safest to call it a file if we do not know */
 139                         inode->i_mode |= S_IFREG;
 140                         cFYI(1, ("unknown type %d", type));
 141                 }
 142
 143                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
 144                         inode->i_uid = cifs_sb->mnt_uid;
 145                 else
 146                         inode->i_uid = le64_to_cpu(findData.Uid);
 147
 148                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
 149                         inode->i_gid = cifs_sb->mnt_gid;
 150                 else
 151                         inode->i_gid = le64_to_cpu(findData.Gid);
 152
 153                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 154
 155                 spin_lock(&inode->i_lock);
 156                 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 157                 /* can not safely change the file size here if the
 158                    client is writing to it due to potential races */
 159                         i_size_write(inode, end_of_file);
 160
 161                 /* blksize needs to be multiple of two. So safer to default to
 162                 blksize and blkbits set in superblock so 2**blkbits and blksize
 163                 will match rather than setting to:
 164                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 165
 166                 /* This seems incredibly stupid but it turns out that i_blocks
 167                    is not related to (i_size / i_blksize), instead 512 byte size
 168                    is required for calculating num blocks */
 169
 170                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 171                 /* for this calculation */
 172                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 173                 }
 174                 spin_unlock(&inode->i_lock);
 175
 176                 if (num_of_bytes < end_of_file)
 177                         cFYI(1, ("allocation size less than end of file"));
 178                 cFYI(1, ("Size %ld and blocks %llu",
 179                         (unsigned long) inode->i_size,
 180                         (unsigned long long)inode->i_blocks));
 181                 if (S_ISREG(inode->i_mode)) {
 182                         cFYI(1, ("File inode"));
 183                         inode->i_op = &cifs_file_inode_ops;
 184                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 185                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 186                                         inode->i_fop =
 187                                                 &cifs_file_direct_nobrl_ops;
 188                                 else
 189                                         inode->i_fop = &cifs_file_direct_ops;
 190                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 191                                 inode->i_fop = &cifs_file_nobrl_ops;
 192                         else /* not direct, send byte range locks */
 193                                 inode->i_fop = &cifs_file_ops;
 194
 195                         /* check if server can support readpages */
 196                         if (pTcon->ses->server->maxBuf <
 197                             PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 198                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 199                         else
 200                                 inode->i_data.a_ops = &cifs_addr_ops;
 201                 } else if (S_ISDIR(inode->i_mode)) {
 202                         cFYI(1, ("Directory inode"));
 203                         inode->i_op = &cifs_dir_inode_ops;
 204                         inode->i_fop = &cifs_dir_ops;
 205                 } else if (S_ISLNK(inode->i_mode)) {
 206                         cFYI(1, ("Symbolic Link inode"));
 207                         inode->i_op = &cifs_symlink_inode_ops;
 208                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 209                 } else {
 210                         cFYI(1, ("Init special inode"));
 211                         init_special_inode(inode, inode->i_mode,
 212                                            inode->i_rdev);
 213                 }
 214         }
 215         return rc;
 216 }
 217
 218 static int decode_sfu_inode(struct inode *inode, __u64 size,
 219                             const unsigned char *path,
 220                             struct cifs_sb_info *cifs_sb, int xid)
 221 {
 222         int rc;
 223         int oplock = FALSE;
 224         __u16 netfid;
 225         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 226         char buf[24];
 227         unsigned int bytes_read;
 228         char *pbuf;
 229
 230         pbuf = buf;
 231
 232         if (size == 0) {
 233                 inode->i_mode |= S_IFIFO;
 234                 return 0;
 235         } else if (size < 8) {
 236                 return -EINVAL;  /* EOPNOTSUPP? */
 237         }
 238
 239         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 240                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 241                          cifs_sb->local_nls,
 242                          cifs_sb->mnt_cifs_flags &
 243                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 244         if (rc == 0) {
 245                 int buf_type = CIFS_NO_BUFFER;
 246                         /* Read header */
 247                 rc = CIFSSMBRead(xid, pTcon,
 248                                  netfid,
 249                                  24 /* length */, 0 /* offset */,
 250                                  &bytes_read, &pbuf, &buf_type);
 251                 if ((rc == 0) && (bytes_read >= 8)) {
 252                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 253                                 cFYI(1, ("Block device"));
 254                                 inode->i_mode |= S_IFBLK;
 255                                 if (bytes_read == 24) {
 256                                         /* we have enough to decode dev num */
 257                                         __u64 mjr; /* major */
 258                                         __u64 mnr; /* minor */
 259                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 260                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 261                                         inode->i_rdev = MKDEV(mjr, mnr);
 262                                 }
 263                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 264                                 cFYI(1, ("Char device"));
 265                                 inode->i_mode |= S_IFCHR;
 266                                 if (bytes_read == 24) {
 267                                         /* we have enough to decode dev num */
 268                                         __u64 mjr; /* major */
 269                                         __u64 mnr; /* minor */
 270                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 271                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 272                                         inode->i_rdev = MKDEV(mjr, mnr);
 273                                 }
 274                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 275                                 cFYI(1, ("Symlink"));
 276                                 inode->i_mode |= S_IFLNK;
 277                         } else {
 278                                 inode->i_mode |= S_IFREG; /* file? */
 279                                 rc = -EOPNOTSUPP;
 280                         }
 281                 } else {
 282                         inode->i_mode |= S_IFREG; /* then it is a file */
 283                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 284                 }
 285                 CIFSSMBClose(xid, pTcon, netfid);
 286         }
 287         return rc;
 288 }
 289
 290 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 291
 292 static int get_sfu_mode(struct inode *inode,
 293                         const unsigned char *path,
 294                         struct cifs_sb_info *cifs_sb, int xid)
 295 {
 296 #ifdef CONFIG_CIFS_XATTR
 297         ssize_t rc;
 298         char ea_value[4];
 299         __u32 mode;
 300
 301         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 302                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 303                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 304         if (rc < 0)
 305                 return (int)rc;
 306         else if (rc > 3) {
 307                 mode = le32_to_cpu(*((__le32 *)ea_value));
 308                 inode->i_mode &= ~SFBITS_MASK;
 309                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 310                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 311                 cFYI(1, ("special mode bits 0%o", mode));
 312                 return 0;
 313         } else {
 314                 return 0;
 315         }
 316 #else
 317         return -EOPNOTSUPP;
 318 #endif
 319 }
 320
 321 int cifs_get_inode_info(struct inode **pinode,
 322         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 323         struct super_block *sb, int xid)
 324 {
 325         int rc = 0;
 326         struct cifsTconInfo *pTcon;
 327         struct inode *inode;
 328         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 329         char *tmp_path;
 330         char *buf = NULL;
 331         int adjustTZ = FALSE;
 332
 333         pTcon = cifs_sb->tcon;
 334         cFYI(1, ("Getting info on %s", search_path));
 335
 336         if ((pfindData == NULL) && (*pinode != NULL)) {
 337                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 338                         cFYI(1, ("No need to revalidate cached inode sizes"));
 339                         return rc;
 340                 }
 341         }
 342
 343         /* if file info not passed in then get it from server */
 344         if (pfindData == NULL) {
 345                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 346                 if (buf == NULL)
 347                         return -ENOMEM;
 348                 pfindData = (FILE_ALL_INFO *)buf;
 349                 /* could do find first instead but this returns more info */
 350                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 351                               0 /* not legacy */,
 352                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 353                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 354                 /* BB optimize code so we do not make the above call
 355                 when server claims no NT SMB support and the above call
 356                 failed at least once - set flag in tcon or mount */
 357                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 358                         rc = SMBQueryInformation(xid, pTcon, search_path,
 359                                         pfindData, cifs_sb->local_nls,
 360                                         cifs_sb->mnt_cifs_flags &
 361                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 362                         adjustTZ = TRUE;
 363                 }
 364         }
 365         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 366         if (rc) {
 367                 if (rc == -EREMOTE) {
 368                         tmp_path =
 369                             kmalloc(strnlen
 370                                     (pTcon->treeName,
 371                                      MAX_TREE_SIZE + 1) +
 372                                     strnlen(search_path, MAX_PATHCONF) + 1,
 373                                     GFP_KERNEL);
 374                         if (tmp_path == NULL) {
 375                                 kfree(buf);
 376                                 return -ENOMEM;
 377                         }
 378
 379                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 380                         strncat(tmp_path, search_path, MAX_PATHCONF);
 381                         rc = connect_to_dfs_path(xid, pTcon->ses,
 382                                                  /* treename + */ tmp_path,
 383                                                  cifs_sb->local_nls,
 384                                                  cifs_sb->mnt_cifs_flags &
 385                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 386                         kfree(tmp_path);
 387                         /* BB fix up inode etc. */
 388                 } else if (rc) {
 389                         kfree(buf);
 390                         return rc;
 391                 }
 392         } else {
 393                 struct cifsInodeInfo *cifsInfo;
 394                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 395
 396                 /* get new inode */
 397                 if (*pinode == NULL) {
 398                         *pinode = new_inode(sb);
 399                         if (*pinode == NULL) {
 400                                 kfree(buf);
 401                                 return -ENOMEM;
 402                         }
 403                         /* Is an i_ino of zero legal? Can we use that to check
 404                            if the server supports returning inode numbers?  Are
 405                            there other sanity checks we can use to ensure that
 406                            the server is really filling in that field? */
 407
 408                         /* We can not use the IndexNumber field by default from
 409                            Windows or Samba (in ALL_INFO buf) but we can request
 410                            it explicitly.  It may not be unique presumably if
 411                            the server has multiple devices mounted under one
 412                            share */
 413
 414                         /* There may be higher info levels that work but are
 415                            there Windows server or network appliances for which
 416                            IndexNumber field is not guaranteed unique? */
 417
 418                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 419                                 int rc1 = 0;
 420                                 __u64 inode_num;
 421
 422                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 423                                         search_path, &inode_num,
 424                                         cifs_sb->local_nls,
 425                                         cifs_sb->mnt_cifs_flags &
 426                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 427                                 if (rc1) {
 428                                         cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 429                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 430                                 } else /* do we need cast or hash to ino? */
 431                                         (*pinode)->i_ino = inode_num;
 432                         } /* else ino incremented to unique num in new_inode*/
 433                         if (sb->s_flags & MS_NOATIME)
 434                                 (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 435                         insert_inode_hash(*pinode);
 436                 }
 437                 inode = *pinode;
 438                 cifsInfo = CIFS_I(inode);
 439                 cifsInfo->cifsAttrs = attr;
 440                 cFYI(1, ("Old time %ld", cifsInfo->time));
 441                 cifsInfo->time = jiffies;
 442                 cFYI(1, ("New time %ld", cifsInfo->time));
 443
 444                 /* blksize needs to be multiple of two. So safer to default to
 445                 blksize and blkbits set in superblock so 2**blkbits and blksize
 446                 will match rather than setting to:
 447                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 448
 449                 /* Linux can not store file creation time so ignore it */
 450                 if (pfindData->LastAccessTime)
 451                         inode->i_atime = cifs_NTtimeToUnix
 452                                 (le64_to_cpu(pfindData->LastAccessTime));
 453                 else /* do not need to use current_fs_time - time not stored */
 454                         inode->i_atime = CURRENT_TIME;
 455                 inode->i_mtime =
 456                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 457                 inode->i_ctime =
 458                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 459                 cFYI(0, ("Attributes came in as 0x%x", attr));
 460                 if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 461                         inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 462                         inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 463                 }
 464
 465                 /* set default mode. will override for dirs below */
 466                 if (atomic_read(&cifsInfo->inUse) == 0)
 467                         /* new inode, can safely set these fields */
 468                         inode->i_mode = cifs_sb->mnt_file_mode;
 469                 else /* since we set the inode type below we need to mask off
 470                      to avoid strange results if type changes and both
 471                      get orred in */
 472                         inode->i_mode &= ~S_IFMT;
 473 /*              if (attr & ATTR_REPARSE)  */
 474                 /* We no longer handle these as symlinks because we could not
 475                    follow them due to the absolute path with drive letter */
 476                 if (attr & ATTR_DIRECTORY) {
 477                 /* override default perms since we do not do byte range locking
 478                    on dirs */
 479                         inode->i_mode = cifs_sb->mnt_dir_mode;
 480                         inode->i_mode |= S_IFDIR;
 481                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 482                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 483                            /* No need to le64 convert size of zero */
 484                            (pfindData->EndOfFile == 0)) {
 485                         inode->i_mode = cifs_sb->mnt_file_mode;
 486                         inode->i_mode |= S_IFIFO;
 487 /* BB Finish for SFU style symlinks and devices */
 488                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 489                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 490                         if (decode_sfu_inode(inode,
 491                                          le64_to_cpu(pfindData->EndOfFile),
 492                                          search_path,
 493                                          cifs_sb, xid))
 494                                 cFYI(1, ("Unrecognized sfu inode type"));
 495
 496                         cFYI(1, ("sfu mode 0%o", inode->i_mode));
 497                 } else {
 498                         inode->i_mode |= S_IFREG;
 499                         /* treat the dos attribute of read-only as read-only
 500                            mode e.g. 555 */
 501                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 502                                 inode->i_mode &= ~(S_IWUGO);
 503                         else if ((inode->i_mode & S_IWUGO) == 0)
 504                                 /* the ATTR_READONLY flag may have been */
 505                                 /* changed on server -- set any w bits  */
 506                                 /* allowed by mnt_file_mode             */
 507                                 inode->i_mode |= (S_IWUGO &
 508                                                   cifs_sb->mnt_file_mode);
 509                 /* BB add code here -
 510                    validate if device or weird share or device type? */
 511                 }
 512
 513                 spin_lock(&inode->i_lock);
 514                 if (is_size_safe_to_change(cifsInfo,
 515                                            le64_to_cpu(pfindData->EndOfFile))) {
 516                         /* can not safely shrink the file size here if the
 517                            client is writing to it due to potential races */
 518                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 519
 520                         /* 512 bytes (2**9) is the fake blocksize that must be
 521                            used for this calculation */
 522                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 523                                            pfindData->AllocationSize)) >> 9;
 524                 }
 525                 spin_unlock(&inode->i_lock);
 526
 527                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 528
 529                 /* BB fill in uid and gid here? with help from winbind?
 530                    or retrieve from NTFS stream extended attribute */
 531 #ifdef CONFIG_CIFS_EXPERIMENTAL
 532                 /* fill in 0777 bits from ACL */
 533                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 534                         cFYI(1, ("Getting mode bits from ACL"));
 535                         acl_to_uid_mode(inode, search_path);
 536                 }
 537 #endif
 538                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 539                         /* fill in remaining high mode bits e.g. SUID, VTX */
 540                         get_sfu_mode(inode, search_path, cifs_sb, xid);
 541                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 542                         inode->i_uid = cifs_sb->mnt_uid;
 543                         inode->i_gid = cifs_sb->mnt_gid;
 544                         /* set so we do not keep refreshing these fields with
 545                            bad data after user has changed them in memory */
 546                         atomic_set(&cifsInfo->inUse, 1);
 547                 }
 548
 549                 if (S_ISREG(inode->i_mode)) {
 550                         cFYI(1, ("File inode"));
 551                         inode->i_op = &cifs_file_inode_ops;
 552                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 553                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 554                                         inode->i_fop =
 555                                                 &cifs_file_direct_nobrl_ops;
 556                                 else
 557                                         inode->i_fop = &cifs_file_direct_ops;
 558                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 559                                 inode->i_fop = &cifs_file_nobrl_ops;
 560                         else /* not direct, send byte range locks */
 561                                 inode->i_fop = &cifs_file_ops;
 562
 563                         if (pTcon->ses->server->maxBuf <
 564                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 565                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 566                         else
 567                                 inode->i_data.a_ops = &cifs_addr_ops;
 568                 } else if (S_ISDIR(inode->i_mode)) {
 569                         cFYI(1, ("Directory inode"));
 570                         inode->i_op = &cifs_dir_inode_ops;
 571                         inode->i_fop = &cifs_dir_ops;
 572                 } else if (S_ISLNK(inode->i_mode)) {
 573                         cFYI(1, ("Symbolic Link inode"));
 574                         inode->i_op = &cifs_symlink_inode_ops;
 575                 } else {
 576                         init_special_inode(inode, inode->i_mode,
 577                                            inode->i_rdev);
 578                 }
 579         }
 580         kfree(buf);
 581         return rc;
 582 }
 583
 584 static const struct inode_operations cifs_ipc_inode_ops = {
 585         .lookup = cifs_lookup,
 586 };
 587
 588 /* gets root inode */
 589 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         cFYI(DBG2, ("object type: %d", type));
 841         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 842         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 843         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 844
 845         spin_lock(&tmp_inode->i_lock);
 846         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 847                 /* can not safely change the file size here if the
 848                 client is writing to it due to potential races */
 849                 i_size_write(tmp_inode, end_of_file);
 850
 851         /* 512 bytes (2**9) is the fake blocksize that must be used */
 852         /* for this calculation, not the real blocksize */
 853                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 854         }
 855         spin_unlock(&tmp_inode->i_lock);
 856
 857         if (S_ISREG(tmp_inode->i_mode)) {
 858                 cFYI(1, ("File inode"));
 859                 tmp_inode->i_op = &cifs_file_inode_ops;
 860
 861                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 862                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 863                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 864                         else
 865                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 866
 867                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 868                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 869                 else
 870                         tmp_inode->i_fop = &cifs_file_ops;
 871
 872                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 873                    (cifs_sb->tcon->ses->server->maxBuf <
 874                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 875                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 876                 else
 877                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 878
 879                 if (isNewInode)
 880                         return; /* No sense invalidating pages for new inode
 881                                    since we we have not started caching
 882                                    readahead file data yet */
 883
 884                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 885                         (local_size == tmp_inode->i_size)) {
 886                         cFYI(1, ("inode exists but unchanged"));
 887                 } else {
 888                         /* file may have changed on server */
 889                         cFYI(1, ("invalidate inode, readdir detected change"));
 890                         invalidate_remote_inode(tmp_inode);
 891                 }
 892         } else if (S_ISDIR(tmp_inode->i_mode)) {
 893                 cFYI(1, ("Directory inode"));
 894                 tmp_inode->i_op = &cifs_dir_inode_ops;
 895                 tmp_inode->i_fop = &cifs_dir_ops;
 896         } else if (S_ISLNK(tmp_inode->i_mode)) {
 897                 cFYI(1, ("Symbolic Link inode"));
 898                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 899 /* tmp_inode->i_fop = *//* do not need to set to anything */
 900         } else {
 901                 cFYI(1, ("Special inode"));
 902                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 903                                    tmp_inode->i_rdev);
 904         }
 905 }
 906
 907 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 908 {
 909         int rc = 0;
 910         int xid;
 911         struct cifs_sb_info *cifs_sb;
 912         struct cifsTconInfo *pTcon;
 913         char *full_path = NULL;
 914         struct inode *newinode = NULL;
 915
 916         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 917
 918         xid = GetXid();
 919
 920         cifs_sb = CIFS_SB(inode->i_sb);
 921         pTcon = cifs_sb->tcon;
 922
 923         full_path = build_path_from_dentry(direntry);
 924         if (full_path == NULL) {
 925                 FreeXid(xid);
 926                 return -ENOMEM;
 927         }
 928
 929         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 930                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 931                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 932                 u32 oplock = 0;
 933                 FILE_UNIX_BASIC_INFO *pInfo =
 934                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 935                 if (pInfo == NULL) {
 936                         rc = -ENOMEM;
 937                         goto mkdir_out;
 938                 }
 939
 940                 mode &= ~current->fs->umask;
 941                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 942                                 mode, NULL /* netfid */, pInfo, &oplock,
 943                                 full_path, cifs_sb->local_nls,
 944                                 cifs_sb->mnt_cifs_flags &
 945                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 946                 if (rc == -EOPNOTSUPP) {
 947                         kfree(pInfo);
 948                         goto mkdir_retry_old;
 949                 } else if (rc) {
 950                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 951                         d_drop(direntry);
 952                 } else {
 953                         int obj_type;
 954                         if (pInfo->Type == cpu_to_le32(-1)) {
 955                                 /* no return info, go query for it */
 956                                 kfree(pInfo);
 957                                 goto mkdir_get_info;
 958                         }
 959 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 960         to set uid/gid */
 961                         inc_nlink(inode);
 962                         if (pTcon->nocase)
 963                                 direntry->d_op = &cifs_ci_dentry_ops;
 964                         else
 965                                 direntry->d_op = &cifs_dentry_ops;
 966
 967                         newinode = new_inode(inode->i_sb);
 968                         if (newinode == NULL) {
 969                                 kfree(pInfo);
 970                                 goto mkdir_get_info;
 971                         }
 972                         /* Is an i_ino of zero legal? */
 973                         /* Are there sanity checks we can use to ensure that
 974                            the server is really filling in that field? */
 975                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 976                                 newinode->i_ino =
 977                                         (unsigned long)pInfo->UniqueId;
 978                         } /* note ino incremented to unique num in new_inode */
 979                         if (inode->i_sb->s_flags & MS_NOATIME)
 980                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 981                         newinode->i_nlink = 2;
 982
 983                         insert_inode_hash(newinode);
 984                         d_instantiate(direntry, newinode);
 985
 986                         /* we already checked in POSIXCreate whether
 987                            frame was long enough */
 988                         posix_fill_in_inode(direntry->d_inode,
 989                                         pInfo, &obj_type, 1 /* NewInode */);
 990 #ifdef CONFIG_CIFS_DEBUG2
 991                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 992                                 direntry, direntry->d_name.name, newinode));
 993
 994                         if (newinode->i_nlink != 2)
 995                                 cFYI(1, ("unexpected number of links %d",
 996                                         newinode->i_nlink));
 997 #endif
 998                 }
 999                 kfree(pInfo);
1000                 goto mkdir_out;
1001         }
1002 mkdir_retry_old:
1003         /* BB add setting the equivalent of mode via CreateX w/ACLs */
1004         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1005                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1006         if (rc) {
1007                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1008                 d_drop(direntry);
1009         } else {
1010 mkdir_get_info:
1011                 inc_nlink(inode);
1012                 if (pTcon->unix_ext)
1013                         rc = cifs_get_inode_info_unix(&newinode, full_path,
1014                                                       inode->i_sb, xid);
1015                 else
1016                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
1017                                                  inode->i_sb, xid);
1018
1019                 if (pTcon->nocase)
1020                         direntry->d_op = &cifs_ci_dentry_ops;
1021                 else
1022                         direntry->d_op = &cifs_dentry_ops;
1023                 d_instantiate(direntry, newinode);
1024                  /* setting nlink not necessary except in cases where we
1025                   * failed to get it from the server or was set bogus */
1026                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1027                                 direntry->d_inode->i_nlink = 2;
1028                 if (pTcon->unix_ext) {
1029                         mode &= ~current->fs->umask;
1030                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1031                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1032                                                     mode,
1033                                                     (__u64)current->fsuid,
1034                                                     (__u64)current->fsgid,
1035                                                     0 /* dev_t */,
1036                                                     cifs_sb->local_nls,
1037                                                     cifs_sb->mnt_cifs_flags &
1038                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1039                         } else {
1040                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1041                                                     mode, (__u64)-1,
1042                                                     (__u64)-1, 0 /* dev_t */,
1043                                                     cifs_sb->local_nls,
1044                                                     cifs_sb->mnt_cifs_flags &
1045                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1046                         }
1047                 } else {
1048                         /* BB to be implemented via Windows secrty descriptors
1049                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1050                                                  -1, -1, local_nls); */
1051                         if (direntry->d_inode) {
1052                                 direntry->d_inode->i_mode = mode;
1053                                 direntry->d_inode->i_mode |= S_IFDIR;
1054                                 if (cifs_sb->mnt_cifs_flags &
1055                                      CIFS_MOUNT_SET_UID) {
1056                                         direntry->d_inode->i_uid =
1057                                                 current->fsuid;
1058                                         direntry->d_inode->i_gid =
1059                                                 current->fsgid;
1060                                 }
1061                         }
1062                 }
1063         }
1064 mkdir_out:
1065         kfree(full_path);
1066         FreeXid(xid);
1067         return rc;
1068 }
1069
1070 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1071 {
1072         int rc = 0;
1073         int xid;
1074         struct cifs_sb_info *cifs_sb;
1075         struct cifsTconInfo *pTcon;
1076         char *full_path = NULL;
1077         struct cifsInodeInfo *cifsInode;
1078
1079         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1080
1081         xid = GetXid();
1082
1083         cifs_sb = CIFS_SB(inode->i_sb);
1084         pTcon = cifs_sb->tcon;
1085
1086         full_path = build_path_from_dentry(direntry);
1087         if (full_path == NULL) {
1088                 FreeXid(xid);
1089                 return -ENOMEM;
1090         }
1091
1092         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1093                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1094
1095         if (!rc) {
1096                 drop_nlink(inode);
1097                 spin_lock(&direntry->d_inode->i_lock);
1098                 i_size_write(direntry->d_inode, 0);
1099                 clear_nlink(direntry->d_inode);
1100                 spin_unlock(&direntry->d_inode->i_lock);
1101         }
1102
1103         cifsInode = CIFS_I(direntry->d_inode);
1104         cifsInode->time = 0;    /* force revalidate to go get info when
1105                                    needed */
1106         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1107                 current_fs_time(inode->i_sb);
1108
1109         kfree(full_path);
1110         FreeXid(xid);
1111         return rc;
1112 }
1113
1114 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1115         struct inode *target_inode, struct dentry *target_direntry)
1116 {
1117         char *fromName;
1118         char *toName;
1119         struct cifs_sb_info *cifs_sb_source;
1120         struct cifs_sb_info *cifs_sb_target;
1121         struct cifsTconInfo *pTcon;
1122         int xid;
1123         int rc = 0;
1124
1125         xid = GetXid();
1126
1127         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1128         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1129         pTcon = cifs_sb_source->tcon;
1130
1131         if (pTcon != cifs_sb_target->tcon) {
1132                 FreeXid(xid);
1133                 return -EXDEV;  /* BB actually could be allowed if same server,
1134                                    but different share.
1135                                    Might eventually add support for this */
1136         }
1137
1138         /* we already  have the rename sem so we do not need to grab it again
1139            here to protect the path integrity */
1140         fromName = build_path_from_dentry(source_direntry);
1141         toName = build_path_from_dentry(target_direntry);
1142         if ((fromName == NULL) || (toName == NULL)) {
1143                 rc = -ENOMEM;
1144                 goto cifs_rename_exit;
1145         }
1146
1147         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1148                            cifs_sb_source->local_nls,
1149                            cifs_sb_source->mnt_cifs_flags &
1150                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1151         if (rc == -EEXIST) {
1152                 /* check if they are the same file because rename of hardlinked
1153                    files is a noop */
1154                 FILE_UNIX_BASIC_INFO *info_buf_source;
1155                 FILE_UNIX_BASIC_INFO *info_buf_target;
1156
1157                 info_buf_source =
1158                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1159                 if (info_buf_source != NULL) {
1160                         info_buf_target = info_buf_source + 1;
1161                         if (pTcon->unix_ext)
1162                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1163                                         info_buf_source,
1164                                         cifs_sb_source->local_nls,
1165                                         cifs_sb_source->mnt_cifs_flags &
1166                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1167                         /* else rc is still EEXIST so will fall through to
1168                            unlink the target and retry rename */
1169                         if (rc == 0) {
1170                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1171                                                 info_buf_target,
1172                                                 cifs_sb_target->local_nls,
1173                                                 /* remap based on source sb */
1174                                                 cifs_sb_source->mnt_cifs_flags &
1175                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1176                         }
1177                         if ((rc == 0) &&
1178                             (info_buf_source->UniqueId ==
1179                              info_buf_target->UniqueId)) {
1180                         /* do not rename since the files are hardlinked which
1181                            is a noop */
1182                         } else {
1183                         /* we either can not tell the files are hardlinked
1184                            (as with Windows servers) or files are not
1185                            hardlinked so delete the target manually before
1186                            renaming to follow POSIX rather than Windows
1187                            semantics */
1188                                 cifs_unlink(target_inode, target_direntry);
1189                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1190                                                    toName,
1191                                                    cifs_sb_source->local_nls,
1192                                                    cifs_sb_source->mnt_cifs_flags
1193                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1194                         }
1195                         kfree(info_buf_source);
1196                 } /* if we can not get memory just leave rc as EEXIST */
1197         }
1198
1199         if (rc)
1200                 cFYI(1, ("rename rc %d", rc));
1201
1202         if ((rc == -EIO) || (rc == -EEXIST)) {
1203                 int oplock = FALSE;
1204                 __u16 netfid;
1205
1206                 /* BB FIXME Is Generic Read correct for rename? */
1207                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1208                    need to test renaming open directory, also GENERIC_READ
1209                    might not right be right access to request */
1210                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1211                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1212                                  cifs_sb_source->local_nls,
1213                                  cifs_sb_source->mnt_cifs_flags &
1214                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1215                 if (rc == 0) {
1216                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1217                                               cifs_sb_source->local_nls,
1218                                               cifs_sb_source->mnt_cifs_flags &
1219                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1220                         CIFSSMBClose(xid, pTcon, netfid);
1221                 }
1222         }
1223
1224 cifs_rename_exit:
1225         kfree(fromName);
1226         kfree(toName);
1227         FreeXid(xid);
1228         return rc;
1229 }
1230
1231 int cifs_revalidate(struct dentry *direntry)
1232 {
1233         int xid;
1234         int rc = 0, wbrc = 0;
1235         char *full_path;
1236         struct cifs_sb_info *cifs_sb;
1237         struct cifsInodeInfo *cifsInode;
1238         loff_t local_size;
1239         struct timespec local_mtime;
1240         int invalidate_inode = FALSE;
1241
1242         if (direntry->d_inode == NULL)
1243                 return -ENOENT;
1244
1245         cifsInode = CIFS_I(direntry->d_inode);
1246
1247         if (cifsInode == NULL)
1248                 return -ENOENT;
1249
1250         /* no sense revalidating inode info on file that no one can write */
1251         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1252                 return rc;
1253
1254         xid = GetXid();
1255
1256         cifs_sb = CIFS_SB(direntry->d_sb);
1257
1258         /* can not safely grab the rename sem here if rename calls revalidate
1259            since that would deadlock */
1260         full_path = build_path_from_dentry(direntry);
1261         if (full_path == NULL) {
1262                 FreeXid(xid);
1263                 return -ENOMEM;
1264         }
1265         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1266                  "jiffies %ld", full_path, direntry->d_inode,
1267                  direntry->d_inode->i_count.counter, direntry,
1268                  direntry->d_time, jiffies));
1269
1270         if (cifsInode->time == 0) {
1271                 /* was set to zero previously to force revalidate */
1272         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1273                    lookupCacheEnabled) {
1274                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1275                     (direntry->d_inode->i_nlink == 1)) {
1276                         kfree(full_path);
1277                         FreeXid(xid);
1278                         return rc;
1279                 } else {
1280                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1281                 }
1282         }
1283
1284         /* save mtime and size */
1285         local_mtime = direntry->d_inode->i_mtime;
1286         local_size = direntry->d_inode->i_size;
1287
1288         if (cifs_sb->tcon->unix_ext) {
1289                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1290                                               direntry->d_sb, xid);
1291                 if (rc) {
1292                         cFYI(1, ("error on getting revalidate info %d", rc));
1293 /*                      if (rc != -ENOENT)
1294                                 rc = 0; */      /* BB should we cache info on
1295                                                    certain errors? */
1296                 }
1297         } else {
1298                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1299                                          direntry->d_sb, xid);
1300                 if (rc) {
1301                         cFYI(1, ("error on getting revalidate info %d", rc));
1302 /*                      if (rc != -ENOENT)
1303                                 rc = 0; */      /* BB should we cache info on
1304                                                    certain errors? */
1305                 }
1306         }
1307         /* should we remap certain errors, access denied?, to zero */
1308
1309         /* if not oplocked, we invalidate inode pages if mtime or file size
1310            had changed on server */
1311
1312         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1313             (local_size == direntry->d_inode->i_size)) {
1314                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1315         } else {
1316                 /* file may have changed on server */
1317                 if (cifsInode->clientCanCacheRead) {
1318                         /* no need to invalidate inode pages since we were the
1319                            only ones who could have modified the file and the
1320                            server copy is staler than ours */
1321                 } else {
1322                         invalidate_inode = TRUE;
1323                 }
1324         }
1325
1326         /* can not grab this sem since kernel filesys locking documentation
1327            indicates i_mutex may be taken by the kernel on lookup and rename
1328            which could deadlock if we grab the i_mutex here as well */
1329 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1330         /* need to write out dirty pages here  */
1331         if (direntry->d_inode->i_mapping) {
1332                 /* do we need to lock inode until after invalidate completes
1333                    below? */
1334                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1335                 if (wbrc)
1336                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1337         }
1338         if (invalidate_inode) {
1339         /* shrink_dcache not necessary now that cifs dentry ops
1340         are exported for negative dentries */
1341 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1342                         shrink_dcache_parent(direntry); */
1343                 if (S_ISREG(direntry->d_inode->i_mode)) {
1344                         if (direntry->d_inode->i_mapping)
1345                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1346                                 if (wbrc)
1347                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1348                         /* may eventually have to do this for open files too */
1349                         if (list_empty(&(cifsInode->openFileList))) {
1350                                 /* changed on server - flush read ahead pages */
1351                                 cFYI(1, ("Invalidating read ahead data on "
1352                                          "closed file"));
1353                                 invalidate_remote_inode(direntry->d_inode);
1354                         }
1355                 }
1356         }
1357 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1358
1359         kfree(full_path);
1360         FreeXid(xid);
1361         return rc;
1362 }
1363
1364 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1365         struct kstat *stat)
1366 {
1367         int err = cifs_revalidate(dentry);
1368         if (!err) {
1369                 generic_fillattr(dentry->d_inode, stat);
1370                 stat->blksize = CIFS_MAX_MSGSIZE;
1371         }
1372         return err;
1373 }
1374
1375 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1376 {
1377         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1378         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1379         struct page *page;
1380         int rc = 0;
1381
1382         page = grab_cache_page(mapping, index);
1383         if (!page)
1384                 return -ENOMEM;
1385
1386         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1387         unlock_page(page);
1388         page_cache_release(page);
1389         return rc;
1390 }
1391
1392 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1393 {
1394         struct address_space *mapping = inode->i_mapping;
1395         unsigned long limit;
1396
1397         spin_lock(&inode->i_lock);
1398         if (inode->i_size < offset)
1399                 goto do_expand;
1400         /*
1401          * truncation of in-use swapfiles is disallowed - it would cause
1402          * subsequent swapout to scribble on the now-freed blocks.
1403          */
1404         if (IS_SWAPFILE(inode)) {
1405                 spin_unlock(&inode->i_lock);
1406                 goto out_busy;
1407         }
1408         i_size_write(inode, offset);
1409         spin_unlock(&inode->i_lock);
1410         /*
1411          * unmap_mapping_range is called twice, first simply for efficiency
1412          * so that truncate_inode_pages does fewer single-page unmaps. However
1413          * after this first call, and before truncate_inode_pages finishes,
1414          * it is possible for private pages to be COWed, which remain after
1415          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1416          * call must be made for correctness.
1417          */
1418         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1419         truncate_inode_pages(mapping, offset);
1420         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1421         goto out_truncate;
1422
1423 do_expand:
1424         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1425         if (limit != RLIM_INFINITY && offset > limit) {
1426                 spin_unlock(&inode->i_lock);
1427                 goto out_sig;
1428         }
1429         if (offset > inode->i_sb->s_maxbytes) {
1430                 spin_unlock(&inode->i_lock);
1431                 goto out_big;
1432         }
1433         i_size_write(inode, offset);
1434         spin_unlock(&inode->i_lock);
1435 out_truncate:
1436         if (inode->i_op && inode->i_op->truncate)
1437                 inode->i_op->truncate(inode);
1438         return 0;
1439 out_sig:
1440         send_sig(SIGXFSZ, current, 0);
1441 out_big:
1442         return -EFBIG;
1443 out_busy:
1444         return -ETXTBSY;
1445 }
1446
1447 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1448 {
1449         int xid;
1450         struct cifs_sb_info *cifs_sb;
1451         struct cifsTconInfo *pTcon;
1452         char *full_path = NULL;
1453         int rc = -EACCES;
1454         struct cifsFileInfo *open_file = NULL;
1455         FILE_BASIC_INFO time_buf;
1456         int set_time = FALSE;
1457         int set_dosattr = FALSE;
1458         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1459         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1460         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1461         struct cifsInodeInfo *cifsInode;
1462
1463         xid = GetXid();
1464
1465         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1466                  direntry->d_name.name, attrs->ia_valid));
1467
1468         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1469         pTcon = cifs_sb->tcon;
1470
1471         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1472                 /* check if we have permission to change attrs */
1473                 rc = inode_change_ok(direntry->d_inode, attrs);
1474                 if (rc < 0) {
1475                         FreeXid(xid);
1476                         return rc;
1477                 } else
1478                         rc = 0;
1479         }
1480
1481         full_path = build_path_from_dentry(direntry);
1482         if (full_path == NULL) {
1483                 FreeXid(xid);
1484                 return -ENOMEM;
1485         }
1486         cifsInode = CIFS_I(direntry->d_inode);
1487
1488         /* BB check if we need to refresh inode from server now ? BB */
1489
1490         if (attrs->ia_valid & ATTR_SIZE) {
1491                 /*
1492                    Flush data before changing file size on server. If the
1493                    flush returns error, store it to report later and continue.
1494                    BB: This should be smarter. Why bother flushing pages that
1495                    will be truncated anyway? Also, should we error out here if
1496                    the flush returns error?
1497                  */
1498                 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1499                 if (rc != 0) {
1500                         CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1501                         rc = 0;
1502                 }
1503
1504                 /* To avoid spurious oplock breaks from server, in the case of
1505                    inodes that we already have open, avoid doing path based
1506                    setting of file size if we can do it by handle.
1507                    This keeps our caching token (oplock) and avoids timeouts
1508                    when the local oplock break takes longer to flush
1509                    writebehind data than the SMB timeout for the SetPathInfo
1510                    request would allow */
1511
1512                 open_file = find_writable_file(cifsInode);
1513                 if (open_file) {
1514                         __u16 nfid = open_file->netfid;
1515                         __u32 npid = open_file->pid;
1516                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1517                                                 nfid, npid, FALSE);
1518                         atomic_dec(&open_file->wrtPending);
1519                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1520                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1521                                 unsigned int bytes_written;
1522                                 rc = CIFSSMBWrite(xid, pTcon,
1523                                                   nfid, 0, attrs->ia_size,
1524                                                   &bytes_written, NULL, NULL,
1525                                                   1 /* 45 seconds */);
1526                                 cFYI(1, ("Wrt seteof rc %d", rc));
1527                         }
1528                 } else
1529                         rc = -EINVAL;
1530
1531                 if (rc != 0) {
1532                         /* Set file size by pathname rather than by handle
1533                            either because no valid, writeable file handle for
1534                            it was found or because there was an error setting
1535                            it by handle */
1536                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1537                                            attrs->ia_size, FALSE,
1538                                            cifs_sb->local_nls,
1539                                            cifs_sb->mnt_cifs_flags &
1540                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1541                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1542                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1543                                 __u16 netfid;
1544                                 int oplock = FALSE;
1545
1546                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1547                                         FILE_OPEN,
1548                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1549                                         CREATE_NOT_DIR, &netfid, &oplock,
1550                                         NULL, cifs_sb->local_nls,
1551                                         cifs_sb->mnt_cifs_flags &
1552                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1553                                 if (rc == 0) {
1554                                         unsigned int bytes_written;
1555                                         rc = CIFSSMBWrite(xid, pTcon,
1556                                                         netfid, 0,
1557                                                         attrs->ia_size,
1558                                                         &bytes_written, NULL,
1559                                                         NULL, 1 /* 45 sec */);
1560                                         cFYI(1, ("wrt seteof rc %d", rc));
1561                                         CIFSSMBClose(xid, pTcon, netfid);
1562                                 }
1563
1564                         }
1565                 }
1566
1567                 /* Server is ok setting allocation size implicitly - no need
1568                    to call:
1569                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1570                          cifs_sb->local_nls);
1571                    */
1572
1573                 if (rc == 0) {
1574                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1575                         cifs_truncate_page(direntry->d_inode->i_mapping,
1576                                            direntry->d_inode->i_size);
1577                 } else
1578                         goto cifs_setattr_exit;
1579         }
1580         if (attrs->ia_valid & ATTR_UID) {
1581                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1582                 uid = attrs->ia_uid;
1583         }
1584         if (attrs->ia_valid & ATTR_GID) {
1585                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1586                 gid = attrs->ia_gid;
1587         }
1588
1589         time_buf.Attributes = 0;
1590
1591         /* skip mode change if it's just for clearing setuid/setgid */
1592         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1593                 attrs->ia_valid &= ~ATTR_MODE;
1594
1595         if (attrs->ia_valid & ATTR_MODE) {
1596                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1597                 mode = attrs->ia_mode;
1598         }
1599
1600         if ((pTcon->unix_ext)
1601             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1602                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1603                                          0 /* dev_t */, cifs_sb->local_nls,
1604                                          cifs_sb->mnt_cifs_flags &
1605                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1606         else if (attrs->ia_valid & ATTR_MODE) {
1607                 rc = 0;
1608 #ifdef CONFIG_CIFS_EXPERIMENTAL
1609                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1610                         rc = mode_to_acl(direntry->d_inode, full_path, mode);
1611                 else if ((mode & S_IWUGO) == 0) {
1612 #else
1613                 if ((mode & S_IWUGO) == 0) {
1614 #endif
1615                         /* not writeable */
1616                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1617                                 set_dosattr = TRUE;
1618                                 time_buf.Attributes =
1619                                         cpu_to_le32(cifsInode->cifsAttrs |
1620                                                     ATTR_READONLY);
1621                         }
1622                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1623                         /* If file is readonly on server, we would
1624                         not be able to write to it - so if any write
1625                         bit is enabled for user or group or other we
1626                         need to at least try to remove r/o dos attr */
1627                         set_dosattr = TRUE;
1628                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1629                                             (~ATTR_READONLY));
1630                         /* Windows ignores set to zero */
1631                         if (time_buf.Attributes == 0)
1632                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1633                 }
1634 #ifdef CONFIG_CIFS_EXPERIMENTAL
1635                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1636                         mode_to_acl(direntry->d_inode, full_path, mode);
1637 #endif
1638         }
1639
1640         if (attrs->ia_valid & ATTR_ATIME) {
1641                 set_time = TRUE;
1642                 time_buf.LastAccessTime =
1643                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1644         } else
1645                 time_buf.LastAccessTime = 0;
1646
1647         if (attrs->ia_valid & ATTR_MTIME) {
1648                 set_time = TRUE;
1649                 time_buf.LastWriteTime =
1650                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1651         } else
1652                 time_buf.LastWriteTime = 0;
1653         /* Do not set ctime explicitly unless other time
1654            stamps are changed explicitly (i.e. by utime()
1655            since we would then have a mix of client and
1656            server times */
1657
1658         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1659                 set_time = TRUE;
1660                 /* Although Samba throws this field away
1661                 it may be useful to Windows - but we do
1662                 not want to set ctime unless some other
1663                 timestamp is changing */
1664                 cFYI(1, ("CIFS - CTIME changed"));
1665                 time_buf.ChangeTime =
1666                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1667         } else
1668                 time_buf.ChangeTime = 0;
1669
1670         if (set_time || set_dosattr) {
1671                 time_buf.CreationTime = 0;      /* do not change */
1672                 /* In the future we should experiment - try setting timestamps
1673                    via Handle (SetFileInfo) instead of by path */
1674                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1675                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1676                                              cifs_sb->local_nls,
1677                                              cifs_sb->mnt_cifs_flags &
1678                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1679                 else
1680                         rc = -EOPNOTSUPP;
1681
1682                 if (rc == -EOPNOTSUPP) {
1683                         int oplock = FALSE;
1684                         __u16 netfid;
1685
1686                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1687                                  "times not supported by this server"));
1688                         /* BB we could scan to see if we already have it open
1689                            and pass in pid of opener to function */
1690                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1691                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1692                                          CREATE_NOT_DIR, &netfid, &oplock,
1693                                          NULL, cifs_sb->local_nls,
1694                                          cifs_sb->mnt_cifs_flags &
1695                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1696                         if (rc == 0) {
1697                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1698                                                          netfid);
1699                                 CIFSSMBClose(xid, pTcon, netfid);
1700                         } else {
1701                         /* BB For even older servers we could convert time_buf
1702                            into old DOS style which uses two second
1703                            granularity */
1704
1705                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1706                                         &time_buf, cifs_sb->local_nls); */
1707                         }
1708                 }
1709                 /* Even if error on time set, no sense failing the call if
1710                 the server would set the time to a reasonable value anyway,
1711                 and this check ensures that we are not being called from
1712                 sys_utimes in which case we ought to fail the call back to
1713                 the user when the server rejects the call */
1714                 if ((rc) && (attrs->ia_valid &
1715                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1716                         rc = 0;
1717         }
1718
1719         /* do not need local check to inode_check_ok since the server does
1720            that */
1721         if (!rc)
1722                 rc = inode_setattr(direntry->d_inode, attrs);
1723 cifs_setattr_exit:
1724         kfree(full_path);
1725         FreeXid(xid);
1726         return rc;
1727 }
1728
1729 #if 0
1730 void cifs_delete_inode(struct inode *inode)
1731 {
1732         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1733         /* may have to add back in if and when safe distributed caching of
1734            directories added e.g. via FindNotify */
1735 }
1736 #endif