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, le64_to_cpu(pfindData->EndOfFile))) {
 515                         /* can not safely shrink the file size here if the
 516                            client is writing to it due to potential races */
 517                         i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 518
 519                         /* 512 bytes (2**9) is the fake blocksize that must be
 520                            used for this calculation */
 521                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 522                                            pfindData->AllocationSize)) >> 9;
 523                 }
 524                 spin_unlock(&inode->i_lock);
 525
 526                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 527
 528                 /* BB fill in uid and gid here? with help from winbind?
 529                    or retrieve from NTFS stream extended attribute */
 530 #ifdef CONFIG_CIFS_EXPERIMENTAL
 531                 /* fill in 0777 bits from ACL */
 532                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 533                         cFYI(1, ("Getting mode bits from ACL"));
 534                         acl_to_uid_mode(inode, search_path);
 535                 }
 536 #endif
 537                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 538                         /* fill in remaining high mode bits e.g. SUID, VTX */
 539                         get_sfu_mode(inode, search_path, cifs_sb, xid);
 540                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 541                         inode->i_uid = cifs_sb->mnt_uid;
 542                         inode->i_gid = cifs_sb->mnt_gid;
 543                         /* set so we do not keep refreshing these fields with
 544                            bad data after user has changed them in memory */
 545                         atomic_set(&cifsInfo->inUse, 1);
 546                 }
 547
 548                 if (S_ISREG(inode->i_mode)) {
 549                         cFYI(1, ("File inode"));
 550                         inode->i_op = &cifs_file_inode_ops;
 551                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 552                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 553                                         inode->i_fop =
 554                                                 &cifs_file_direct_nobrl_ops;
 555                                 else
 556                                         inode->i_fop = &cifs_file_direct_ops;
 557                         } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 558                                 inode->i_fop = &cifs_file_nobrl_ops;
 559                         else /* not direct, send byte range locks */
 560                                 inode->i_fop = &cifs_file_ops;
 561
 562                         if (pTcon->ses->server->maxBuf <
 563                              PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
 564                                 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 565                         else
 566                                 inode->i_data.a_ops = &cifs_addr_ops;
 567                 } else if (S_ISDIR(inode->i_mode)) {
 568                         cFYI(1, ("Directory inode"));
 569                         inode->i_op = &cifs_dir_inode_ops;
 570                         inode->i_fop = &cifs_dir_ops;
 571                 } else if (S_ISLNK(inode->i_mode)) {
 572                         cFYI(1, ("Symbolic Link inode"));
 573                         inode->i_op = &cifs_symlink_inode_ops;
 574                 } else {
 575                         init_special_inode(inode, inode->i_mode,
 576                                            inode->i_rdev);
 577                 }
 578         }
 579         kfree(buf);
 580         return rc;
 581 }
 582
 583 static const struct inode_operations cifs_ipc_inode_ops = {
 584         .lookup = cifs_lookup,
 585 };
 586
 587 /* gets root inode */
 588 void cifs_read_inode(struct inode *inode)
 589 {
 590         int xid, rc;
 591         struct cifs_sb_info *cifs_sb;
 592
 593         cifs_sb = CIFS_SB(inode->i_sb);
 594         xid = GetXid();
 595
 596         if (cifs_sb->tcon->unix_ext)
 597                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 598         else
 599                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid);
 600         if (rc && cifs_sb->tcon->ipc) {
 601                 cFYI(1, ("ipc connection - fake read inode"));
 602                 inode->i_mode |= S_IFDIR;
 603                 inode->i_nlink = 2;
 604                 inode->i_op = &cifs_ipc_inode_ops;
 605                 inode->i_fop = &simple_dir_operations;
 606                 inode->i_uid = cifs_sb->mnt_uid;
 607                 inode->i_gid = cifs_sb->mnt_gid;
 608         }
 609
 610         /* can not call macro FreeXid here since in a void func */
 611         _FreeXid(xid);
 612 }
 613
 614 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 615 {
 616         int rc = 0;
 617         int xid;
 618         struct cifs_sb_info *cifs_sb;
 619         struct cifsTconInfo *pTcon;
 620         char *full_path = NULL;
 621         struct cifsInodeInfo *cifsInode;
 622         FILE_BASIC_INFO *pinfo_buf;
 623
 624         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 625
 626         xid = GetXid();
 627
 628         if (inode)
 629                 cifs_sb = CIFS_SB(inode->i_sb);
 630         else
 631                 cifs_sb = CIFS_SB(direntry->d_sb);
 632         pTcon = cifs_sb->tcon;
 633
 634         /* Unlink can be called from rename so we can not grab the sem here
 635            since we deadlock otherwise */
 636 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 637         full_path = build_path_from_dentry(direntry);
 638 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 639         if (full_path == NULL) {
 640                 FreeXid(xid);
 641                 return -ENOMEM;
 642         }
 643
 644         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 645                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 646                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 647                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 648                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 649                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 650                 cFYI(1, ("posix del rc %d", rc));
 651                 if ((rc == 0) || (rc == -ENOENT))
 652                         goto psx_del_no_retry;
 653         }
 654
 655         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 656                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 657 psx_del_no_retry:
 658         if (!rc) {
 659                 if (direntry->d_inode)
 660                         drop_nlink(direntry->d_inode);
 661         } else if (rc == -ENOENT) {
 662                 d_drop(direntry);
 663         } else if (rc == -ETXTBSY) {
 664                 int oplock = FALSE;
 665                 __u16 netfid;
 666
 667                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 668                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 669                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 670                                  cifs_sb->mnt_cifs_flags &
 671                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 672                 if (rc == 0) {
 673                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 674                                               cifs_sb->local_nls,
 675                                               cifs_sb->mnt_cifs_flags &
 676                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 677                         CIFSSMBClose(xid, pTcon, netfid);
 678                         if (direntry->d_inode)
 679                                 drop_nlink(direntry->d_inode);
 680                 }
 681         } else if (rc == -EACCES) {
 682                 /* try only if r/o attribute set in local lookup data? */
 683                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 684                 if (pinfo_buf) {
 685                         /* ATTRS set to normal clears r/o bit */
 686                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 687                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 688                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 689                                                      pinfo_buf,
 690                                                      cifs_sb->local_nls,
 691                                                      cifs_sb->mnt_cifs_flags &
 692                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 693                         else
 694                                 rc = -EOPNOTSUPP;
 695
 696                         if (rc == -EOPNOTSUPP) {
 697                                 int oplock = FALSE;
 698                                 __u16 netfid;
 699                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 700                                                           full_path,
 701                                                           (__u16)ATTR_NORMAL,
 702                                                           cifs_sb->local_nls);
 703                            For some strange reason it seems that NT4 eats the
 704                            old setattr call without actually setting the
 705                            attributes so on to the third attempted workaround
 706                            */
 707
 708                         /* BB could scan to see if we already have it open
 709                            and pass in pid of opener to function */
 710                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 711                                                  FILE_OPEN, SYNCHRONIZE |
 712                                                  FILE_WRITE_ATTRIBUTES, 0,
 713                                                  &netfid, &oplock, NULL,
 714                                                  cifs_sb->local_nls,
 715                                                  cifs_sb->mnt_cifs_flags &
 716                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 717                                 if (rc == 0) {
 718                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 719                                                                  pinfo_buf,
 720                                                                  netfid);
 721                                         CIFSSMBClose(xid, pTcon, netfid);
 722                                 }
 723                         }
 724                         kfree(pinfo_buf);
 725                 }
 726                 if (rc == 0) {
 727                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 728                                             cifs_sb->local_nls,
 729                                             cifs_sb->mnt_cifs_flags &
 730                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 731                         if (!rc) {
 732                                 if (direntry->d_inode)
 733                                         drop_nlink(direntry->d_inode);
 734                         } else if (rc == -ETXTBSY) {
 735                                 int oplock = FALSE;
 736                                 __u16 netfid;
 737
 738                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 739                                                  FILE_OPEN, DELETE,
 740                                                  CREATE_NOT_DIR |
 741                                                  CREATE_DELETE_ON_CLOSE,
 742                                                  &netfid, &oplock, NULL,
 743                                                  cifs_sb->local_nls,
 744                                                  cifs_sb->mnt_cifs_flags &
 745                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 746                                 if (rc == 0) {
 747                                         CIFSSMBRenameOpenFile(xid, pTcon,
 748                                                 netfid, NULL,
 749                                                 cifs_sb->local_nls,
 750                                                 cifs_sb->mnt_cifs_flags &
 751                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 752                                         CIFSSMBClose(xid, pTcon, netfid);
 753                                         if (direntry->d_inode)
 754                                                 drop_nlink(direntry->d_inode);
 755                                 }
 756                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 757                         }
 758                 }
 759         }
 760         if (direntry->d_inode) {
 761                 cifsInode = CIFS_I(direntry->d_inode);
 762                 cifsInode->time = 0;    /* will force revalidate to get info
 763                                            when needed */
 764                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 765         }
 766         if (inode) {
 767                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 768                 cifsInode = CIFS_I(inode);
 769                 cifsInode->time = 0;    /* force revalidate of dir as well */
 770         }
 771
 772         kfree(full_path);
 773         FreeXid(xid);
 774         return rc;
 775 }
 776
 777 static void posix_fill_in_inode(struct inode *tmp_inode,
 778         FILE_UNIX_BASIC_INFO *pData, int *pobject_type, int isNewInode)
 779 {
 780         loff_t local_size;
 781         struct timespec local_mtime;
 782
 783         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 784         struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
 785
 786         __u32 type = le32_to_cpu(pData->Type);
 787         __u64 num_of_bytes = le64_to_cpu(pData->NumOfBytes);
 788         __u64 end_of_file = le64_to_cpu(pData->EndOfFile);
 789         cifsInfo->time = jiffies;
 790         atomic_inc(&cifsInfo->inUse);
 791
 792         /* save mtime and size */
 793         local_mtime = tmp_inode->i_mtime;
 794         local_size  = tmp_inode->i_size;
 795
 796         tmp_inode->i_atime =
 797             cifs_NTtimeToUnix(le64_to_cpu(pData->LastAccessTime));
 798         tmp_inode->i_mtime =
 799             cifs_NTtimeToUnix(le64_to_cpu(pData->LastModificationTime));
 800         tmp_inode->i_ctime =
 801             cifs_NTtimeToUnix(le64_to_cpu(pData->LastStatusChange));
 802
 803         tmp_inode->i_mode = le64_to_cpu(pData->Permissions);
 804         /* since we set the inode type below we need to mask off type
 805            to avoid strange results if bits above were corrupt */
 806         tmp_inode->i_mode &= ~S_IFMT;
 807         if (type == UNIX_FILE) {
 808                 *pobject_type = DT_REG;
 809                 tmp_inode->i_mode |= S_IFREG;
 810         } else if (type == UNIX_SYMLINK) {
 811                 *pobject_type = DT_LNK;
 812                 tmp_inode->i_mode |= S_IFLNK;
 813         } else if (type == UNIX_DIR) {
 814                 *pobject_type = DT_DIR;
 815                 tmp_inode->i_mode |= S_IFDIR;
 816         } else if (type == UNIX_CHARDEV) {
 817                 *pobject_type = DT_CHR;
 818                 tmp_inode->i_mode |= S_IFCHR;
 819                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 820                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 821         } else if (type == UNIX_BLOCKDEV) {
 822                 *pobject_type = DT_BLK;
 823                 tmp_inode->i_mode |= S_IFBLK;
 824                 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pData->DevMajor),
 825                                 le64_to_cpu(pData->DevMinor) & MINORMASK);
 826         } else if (type == UNIX_FIFO) {
 827                 *pobject_type = DT_FIFO;
 828                 tmp_inode->i_mode |= S_IFIFO;
 829         } else if (type == UNIX_SOCKET) {
 830                 *pobject_type = DT_SOCK;
 831                 tmp_inode->i_mode |= S_IFSOCK;
 832         } else {
 833                 /* safest to just call it a file */
 834                 *pobject_type = DT_REG;
 835                 tmp_inode->i_mode |= S_IFREG;
 836                 cFYI(1, ("unknown inode type %d", type));
 837         }
 838
 839 #ifdef CONFIG_CIFS_DEBUG2
 840         cFYI(1, ("object type: %d", type));
 841 #endif
 842         tmp_inode->i_uid = le64_to_cpu(pData->Uid);
 843         tmp_inode->i_gid = le64_to_cpu(pData->Gid);
 844         tmp_inode->i_nlink = le64_to_cpu(pData->Nlinks);
 845
 846         spin_lock(&tmp_inode->i_lock);
 847         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 848                 /* can not safely change the file size here if the
 849                 client is writing to it due to potential races */
 850                 i_size_write(tmp_inode, end_of_file);
 851
 852         /* 512 bytes (2**9) is the fake blocksize that must be used */
 853         /* for this calculation, not the real blocksize */
 854                 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 855         }
 856         spin_unlock(&tmp_inode->i_lock);
 857
 858         if (S_ISREG(tmp_inode->i_mode)) {
 859                 cFYI(1, ("File inode"));
 860                 tmp_inode->i_op = &cifs_file_inode_ops;
 861
 862                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 863                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 864                                 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
 865                         else
 866                                 tmp_inode->i_fop = &cifs_file_direct_ops;
 867
 868                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 869                         tmp_inode->i_fop = &cifs_file_nobrl_ops;
 870                 else
 871                         tmp_inode->i_fop = &cifs_file_ops;
 872
 873                 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
 874                    (cifs_sb->tcon->ses->server->maxBuf <
 875                         PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
 876                         tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
 877                 else
 878                         tmp_inode->i_data.a_ops = &cifs_addr_ops;
 879
 880                 if (isNewInode)
 881                         return; /* No sense invalidating pages for new inode
 882                                    since we we have not started caching
 883                                    readahead file data yet */
 884
 885                 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 886                         (local_size == tmp_inode->i_size)) {
 887                         cFYI(1, ("inode exists but unchanged"));
 888                 } else {
 889                         /* file may have changed on server */
 890                         cFYI(1, ("invalidate inode, readdir detected change"));
 891                         invalidate_remote_inode(tmp_inode);
 892                 }
 893         } else if (S_ISDIR(tmp_inode->i_mode)) {
 894                 cFYI(1, ("Directory inode"));
 895                 tmp_inode->i_op = &cifs_dir_inode_ops;
 896                 tmp_inode->i_fop = &cifs_dir_ops;
 897         } else if (S_ISLNK(tmp_inode->i_mode)) {
 898                 cFYI(1, ("Symbolic Link inode"));
 899                 tmp_inode->i_op = &cifs_symlink_inode_ops;
 900 /* tmp_inode->i_fop = *//* do not need to set to anything */
 901         } else {
 902                 cFYI(1, ("Special inode"));
 903                 init_special_inode(tmp_inode, tmp_inode->i_mode,
 904                                    tmp_inode->i_rdev);
 905         }
 906 }
 907
 908 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 909 {
 910         int rc = 0;
 911         int xid;
 912         struct cifs_sb_info *cifs_sb;
 913         struct cifsTconInfo *pTcon;
 914         char *full_path = NULL;
 915         struct inode *newinode = NULL;
 916
 917         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 918
 919         xid = GetXid();
 920
 921         cifs_sb = CIFS_SB(inode->i_sb);
 922         pTcon = cifs_sb->tcon;
 923
 924         full_path = build_path_from_dentry(direntry);
 925         if (full_path == NULL) {
 926                 FreeXid(xid);
 927                 return -ENOMEM;
 928         }
 929
 930         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 931                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 932                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 933                 u32 oplock = 0;
 934                 FILE_UNIX_BASIC_INFO * pInfo =
 935                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 936                 if (pInfo == NULL) {
 937                         rc = -ENOMEM;
 938                         goto mkdir_out;
 939                 }
 940
 941                 mode &= ~current->fs->umask;
 942                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 943                                 mode, NULL /* netfid */, pInfo, &oplock,
 944                                 full_path, cifs_sb->local_nls,
 945                                 cifs_sb->mnt_cifs_flags &
 946                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 947                 if (rc == -EOPNOTSUPP) {
 948                         kfree(pInfo);
 949                         goto mkdir_retry_old;
 950                 } else if (rc) {
 951                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 952                         d_drop(direntry);
 953                 } else {
 954                         int obj_type;
 955                         if (pInfo->Type == cpu_to_le32(-1)) {
 956                                 /* no return info, go query for it */
 957                                 kfree(pInfo);
 958                                 goto mkdir_get_info;
 959                         }
 960 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 961         to set uid/gid */
 962                         inc_nlink(inode);
 963                         if (pTcon->nocase)
 964                                 direntry->d_op = &cifs_ci_dentry_ops;
 965                         else
 966                                 direntry->d_op = &cifs_dentry_ops;
 967
 968                         newinode = new_inode(inode->i_sb);
 969                         if (newinode == NULL) {
 970                                 kfree(pInfo);
 971                                 goto mkdir_get_info;
 972                         }
 973                         /* Is an i_ino of zero legal? */
 974                         /* Are there sanity checks we can use to ensure that
 975                            the server is really filling in that field? */
 976                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 977                                 newinode->i_ino =
 978                                         (unsigned long)pInfo->UniqueId;
 979                         } /* note ino incremented to unique num in new_inode */
 980                         if (inode->i_sb->s_flags & MS_NOATIME)
 981                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 982                         newinode->i_nlink = 2;
 983
 984                         insert_inode_hash(newinode);
 985                         d_instantiate(direntry, newinode);
 986
 987                         /* we already checked in POSIXCreate whether
 988                            frame was long enough */
 989                         posix_fill_in_inode(direntry->d_inode,
 990                                         pInfo, &obj_type, 1 /* NewInode */);
 991 #ifdef CONFIG_CIFS_DEBUG2
 992                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 993                                 direntry, direntry->d_name.name, newinode));
 994
 995                         if (newinode->i_nlink != 2)
 996                                 cFYI(1, ("unexpected number of links %d",
 997                                         newinode->i_nlink));
 998 #endif
 999                 }
1000                 kfree(pInfo);
1001                 goto mkdir_out;
1002         }
1003 mkdir_retry_old:
1004         /* BB add setting the equivalent of mode via CreateX w/ACLs */
1005         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
1006                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1007         if (rc) {
1008                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
1009                 d_drop(direntry);
1010         } else {
1011 mkdir_get_info:
1012                 inc_nlink(inode);
1013                 if (pTcon->unix_ext)
1014                         rc = cifs_get_inode_info_unix(&newinode, full_path,
1015                                                       inode->i_sb, xid);
1016                 else
1017                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
1018                                                  inode->i_sb, xid);
1019
1020                 if (pTcon->nocase)
1021                         direntry->d_op = &cifs_ci_dentry_ops;
1022                 else
1023                         direntry->d_op = &cifs_dentry_ops;
1024                 d_instantiate(direntry, newinode);
1025                  /* setting nlink not necessary except in cases where we
1026                   * failed to get it from the server or was set bogus */
1027                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
1028                                 direntry->d_inode->i_nlink = 2;
1029                 if (pTcon->unix_ext) {
1030                         mode &= ~current->fs->umask;
1031                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1032                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1033                                                     mode,
1034                                                     (__u64)current->fsuid,
1035                                                     (__u64)current->fsgid,
1036                                                     0 /* dev_t */,
1037                                                     cifs_sb->local_nls,
1038                                                     cifs_sb->mnt_cifs_flags &
1039                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1040                         } else {
1041                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1042                                                     mode, (__u64)-1,
1043                                                     (__u64)-1, 0 /* dev_t */,
1044                                                     cifs_sb->local_nls,
1045                                                     cifs_sb->mnt_cifs_flags &
1046                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1047                         }
1048                 } else {
1049                         /* BB to be implemented via Windows secrty descriptors
1050                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
1051                                                  -1, -1, local_nls); */
1052                         if (direntry->d_inode) {
1053                                 direntry->d_inode->i_mode = mode;
1054                                 direntry->d_inode->i_mode |= S_IFDIR;
1055                                 if (cifs_sb->mnt_cifs_flags &
1056                                      CIFS_MOUNT_SET_UID) {
1057                                         direntry->d_inode->i_uid =
1058                                                 current->fsuid;
1059                                         direntry->d_inode->i_gid =
1060                                                 current->fsgid;
1061                                 }
1062                         }
1063                 }
1064         }
1065 mkdir_out:
1066         kfree(full_path);
1067         FreeXid(xid);
1068         return rc;
1069 }
1070
1071 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1072 {
1073         int rc = 0;
1074         int xid;
1075         struct cifs_sb_info *cifs_sb;
1076         struct cifsTconInfo *pTcon;
1077         char *full_path = NULL;
1078         struct cifsInodeInfo *cifsInode;
1079
1080         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1081
1082         xid = GetXid();
1083
1084         cifs_sb = CIFS_SB(inode->i_sb);
1085         pTcon = cifs_sb->tcon;
1086
1087         full_path = build_path_from_dentry(direntry);
1088         if (full_path == NULL) {
1089                 FreeXid(xid);
1090                 return -ENOMEM;
1091         }
1092
1093         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1094                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1095
1096         if (!rc) {
1097                 drop_nlink(inode);
1098                 spin_lock(&direntry->d_inode->i_lock);
1099                 i_size_write(direntry->d_inode, 0);
1100                 clear_nlink(direntry->d_inode);
1101                 spin_unlock(&direntry->d_inode->i_lock);
1102         }
1103
1104         cifsInode = CIFS_I(direntry->d_inode);
1105         cifsInode->time = 0;    /* force revalidate to go get info when
1106                                    needed */
1107         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1108                 current_fs_time(inode->i_sb);
1109
1110         kfree(full_path);
1111         FreeXid(xid);
1112         return rc;
1113 }
1114
1115 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1116         struct inode *target_inode, struct dentry *target_direntry)
1117 {
1118         char *fromName;
1119         char *toName;
1120         struct cifs_sb_info *cifs_sb_source;
1121         struct cifs_sb_info *cifs_sb_target;
1122         struct cifsTconInfo *pTcon;
1123         int xid;
1124         int rc = 0;
1125
1126         xid = GetXid();
1127
1128         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1129         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1130         pTcon = cifs_sb_source->tcon;
1131
1132         if (pTcon != cifs_sb_target->tcon) {
1133                 FreeXid(xid);
1134                 return -EXDEV;  /* BB actually could be allowed if same server,
1135                                    but different share.
1136                                    Might eventually add support for this */
1137         }
1138
1139         /* we already  have the rename sem so we do not need to grab it again
1140            here to protect the path integrity */
1141         fromName = build_path_from_dentry(source_direntry);
1142         toName = build_path_from_dentry(target_direntry);
1143         if ((fromName == NULL) || (toName == NULL)) {
1144                 rc = -ENOMEM;
1145                 goto cifs_rename_exit;
1146         }
1147
1148         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1149                            cifs_sb_source->local_nls,
1150                            cifs_sb_source->mnt_cifs_flags &
1151                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1152         if (rc == -EEXIST) {
1153                 /* check if they are the same file because rename of hardlinked
1154                    files is a noop */
1155                 FILE_UNIX_BASIC_INFO *info_buf_source;
1156                 FILE_UNIX_BASIC_INFO *info_buf_target;
1157
1158                 info_buf_source =
1159                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1160                 if (info_buf_source != NULL) {
1161                         info_buf_target = info_buf_source + 1;
1162                         if (pTcon->unix_ext)
1163                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1164                                         info_buf_source,
1165                                         cifs_sb_source->local_nls,
1166                                         cifs_sb_source->mnt_cifs_flags &
1167                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1168                         /* else rc is still EEXIST so will fall through to
1169                            unlink the target and retry rename */
1170                         if (rc == 0) {
1171                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1172                                                 info_buf_target,
1173                                                 cifs_sb_target->local_nls,
1174                                                 /* remap based on source sb */
1175                                                 cifs_sb_source->mnt_cifs_flags &
1176                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1177                         }
1178                         if ((rc == 0) &&
1179                             (info_buf_source->UniqueId ==
1180                              info_buf_target->UniqueId)) {
1181                         /* do not rename since the files are hardlinked which
1182                            is a noop */
1183                         } else {
1184                         /* we either can not tell the files are hardlinked
1185                            (as with Windows servers) or files are not
1186                            hardlinked so delete the target manually before
1187                            renaming to follow POSIX rather than Windows
1188                            semantics */
1189                                 cifs_unlink(target_inode, target_direntry);
1190                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1191                                                    toName,
1192                                                    cifs_sb_source->local_nls,
1193                                                    cifs_sb_source->mnt_cifs_flags
1194                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1195                         }
1196                         kfree(info_buf_source);
1197                 } /* if we can not get memory just leave rc as EEXIST */
1198         }
1199
1200         if (rc) {
1201                 cFYI(1, ("rename rc %d", rc));
1202         }
1203
1204         if ((rc == -EIO) || (rc == -EEXIST)) {
1205                 int oplock = FALSE;
1206                 __u16 netfid;
1207
1208                 /* BB FIXME Is Generic Read correct for rename? */
1209                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1210                    need to test renaming open directory, also GENERIC_READ
1211                    might not right be right access to request */
1212                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1213                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1214                                  cifs_sb_source->local_nls,
1215                                  cifs_sb_source->mnt_cifs_flags &
1216                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1217                 if (rc == 0) {
1218                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1219                                               cifs_sb_source->local_nls,
1220                                               cifs_sb_source->mnt_cifs_flags &
1221                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1222                         CIFSSMBClose(xid, pTcon, netfid);
1223                 }
1224         }
1225
1226 cifs_rename_exit:
1227         kfree(fromName);
1228         kfree(toName);
1229         FreeXid(xid);
1230         return rc;
1231 }
1232
1233 int cifs_revalidate(struct dentry *direntry)
1234 {
1235         int xid;
1236         int rc = 0, wbrc = 0;
1237         char *full_path;
1238         struct cifs_sb_info *cifs_sb;
1239         struct cifsInodeInfo *cifsInode;
1240         loff_t local_size;
1241         struct timespec local_mtime;
1242         int invalidate_inode = FALSE;
1243
1244         if (direntry->d_inode == NULL)
1245                 return -ENOENT;
1246
1247         cifsInode = CIFS_I(direntry->d_inode);
1248
1249         if (cifsInode == NULL)
1250                 return -ENOENT;
1251
1252         /* no sense revalidating inode info on file that no one can write */
1253         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1254                 return rc;
1255
1256         xid = GetXid();
1257
1258         cifs_sb = CIFS_SB(direntry->d_sb);
1259
1260         /* can not safely grab the rename sem here if rename calls revalidate
1261            since that would deadlock */
1262         full_path = build_path_from_dentry(direntry);
1263         if (full_path == NULL) {
1264                 FreeXid(xid);
1265                 return -ENOMEM;
1266         }
1267         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1268                  "jiffies %ld", full_path, direntry->d_inode,
1269                  direntry->d_inode->i_count.counter, direntry,
1270                  direntry->d_time, jiffies));
1271
1272         if (cifsInode->time == 0) {
1273                 /* was set to zero previously to force revalidate */
1274         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1275                    lookupCacheEnabled) {
1276                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1277                     (direntry->d_inode->i_nlink == 1)) {
1278                         kfree(full_path);
1279                         FreeXid(xid);
1280                         return rc;
1281                 } else {
1282                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1283                 }
1284         }
1285
1286         /* save mtime and size */
1287         local_mtime = direntry->d_inode->i_mtime;
1288         local_size = direntry->d_inode->i_size;
1289
1290         if (cifs_sb->tcon->unix_ext) {
1291                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1292                                               direntry->d_sb, xid);
1293                 if (rc) {
1294                         cFYI(1, ("error on getting revalidate info %d", rc));
1295 /*                      if (rc != -ENOENT)
1296                                 rc = 0; */      /* BB should we cache info on
1297                                                    certain errors? */
1298                 }
1299         } else {
1300                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1301                                          direntry->d_sb, xid);
1302                 if (rc) {
1303                         cFYI(1, ("error on getting revalidate info %d", rc));
1304 /*                      if (rc != -ENOENT)
1305                                 rc = 0; */      /* BB should we cache info on
1306                                                    certain errors? */
1307                 }
1308         }
1309         /* should we remap certain errors, access denied?, to zero */
1310
1311         /* if not oplocked, we invalidate inode pages if mtime or file size
1312            had changed on server */
1313
1314         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1315             (local_size == direntry->d_inode->i_size)) {
1316                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1317         } else {
1318                 /* file may have changed on server */
1319                 if (cifsInode->clientCanCacheRead) {
1320                         /* no need to invalidate inode pages since we were the
1321                            only ones who could have modified the file and the
1322                            server copy is staler than ours */
1323                 } else {
1324                         invalidate_inode = TRUE;
1325                 }
1326         }
1327
1328         /* can not grab this sem since kernel filesys locking documentation
1329            indicates i_mutex may be taken by the kernel on lookup and rename
1330            which could deadlock if we grab the i_mutex here as well */
1331 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1332         /* need to write out dirty pages here  */
1333         if (direntry->d_inode->i_mapping) {
1334                 /* do we need to lock inode until after invalidate completes
1335                    below? */
1336                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1337                 if (wbrc)
1338                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1339         }
1340         if (invalidate_inode) {
1341         /* shrink_dcache not necessary now that cifs dentry ops
1342         are exported for negative dentries */
1343 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1344                         shrink_dcache_parent(direntry); */
1345                 if (S_ISREG(direntry->d_inode->i_mode)) {
1346                         if (direntry->d_inode->i_mapping)
1347                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1348                                 if (wbrc)
1349                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1350                         /* may eventually have to do this for open files too */
1351                         if (list_empty(&(cifsInode->openFileList))) {
1352                                 /* changed on server - flush read ahead pages */
1353                                 cFYI(1, ("Invalidating read ahead data on "
1354                                          "closed file"));
1355                                 invalidate_remote_inode(direntry->d_inode);
1356                         }
1357                 }
1358         }
1359 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1360
1361         kfree(full_path);
1362         FreeXid(xid);
1363         return rc;
1364 }
1365
1366 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1367         struct kstat *stat)
1368 {
1369         int err = cifs_revalidate(dentry);
1370         if (!err) {
1371                 generic_fillattr(dentry->d_inode, stat);
1372                 stat->blksize = CIFS_MAX_MSGSIZE;
1373         }
1374         return err;
1375 }
1376
1377 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1378 {
1379         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1380         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1381         struct page *page;
1382         int rc = 0;
1383
1384         page = grab_cache_page(mapping, index);
1385         if (!page)
1386                 return -ENOMEM;
1387
1388         zero_user_page(page, offset, PAGE_CACHE_SIZE - offset, KM_USER0);
1389         unlock_page(page);
1390         page_cache_release(page);
1391         return rc;
1392 }
1393
1394 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1395 {
1396         struct address_space *mapping = inode->i_mapping;
1397         unsigned long limit;
1398
1399         spin_lock(&inode->i_lock);
1400         if (inode->i_size < offset)
1401                 goto do_expand;
1402         /*
1403          * truncation of in-use swapfiles is disallowed - it would cause
1404          * subsequent swapout to scribble on the now-freed blocks.
1405          */
1406         if (IS_SWAPFILE(inode)) {
1407                 spin_unlock(&inode->i_lock);
1408                 goto out_busy;
1409         }
1410         i_size_write(inode, offset);
1411         spin_unlock(&inode->i_lock);
1412         /*
1413          * unmap_mapping_range is called twice, first simply for efficiency
1414          * so that truncate_inode_pages does fewer single-page unmaps. However
1415          * after this first call, and before truncate_inode_pages finishes,
1416          * it is possible for private pages to be COWed, which remain after
1417          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1418          * call must be made for correctness.
1419          */
1420         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1421         truncate_inode_pages(mapping, offset);
1422         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1423         goto out_truncate;
1424
1425 do_expand:
1426         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1427         if (limit != RLIM_INFINITY && offset > limit) {
1428                 spin_unlock(&inode->i_lock);
1429                 goto out_sig;
1430         }
1431         if (offset > inode->i_sb->s_maxbytes) {
1432                 spin_unlock(&inode->i_lock);
1433                 goto out_big;
1434         }
1435         i_size_write(inode, offset);
1436         spin_unlock(&inode->i_lock);
1437 out_truncate:
1438         if (inode->i_op && inode->i_op->truncate)
1439                 inode->i_op->truncate(inode);
1440         return 0;
1441 out_sig:
1442         send_sig(SIGXFSZ, current, 0);
1443 out_big:
1444         return -EFBIG;
1445 out_busy:
1446         return -ETXTBSY;
1447 }
1448
1449 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1450 {
1451         int xid;
1452         struct cifs_sb_info *cifs_sb;
1453         struct cifsTconInfo *pTcon;
1454         char *full_path = NULL;
1455         int rc = -EACCES;
1456         struct cifsFileInfo *open_file = NULL;
1457         FILE_BASIC_INFO time_buf;
1458         int set_time = FALSE;
1459         int set_dosattr = FALSE;
1460         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1461         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1462         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1463         struct cifsInodeInfo *cifsInode;
1464
1465         xid = GetXid();
1466
1467         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1468                  direntry->d_name.name, attrs->ia_valid));
1469
1470         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1471         pTcon = cifs_sb->tcon;
1472
1473         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1474                 /* check if we have permission to change attrs */
1475                 rc = inode_change_ok(direntry->d_inode, attrs);
1476                 if (rc < 0) {
1477                         FreeXid(xid);
1478                         return rc;
1479                 } else
1480                         rc = 0;
1481         }
1482
1483         full_path = build_path_from_dentry(direntry);
1484         if (full_path == NULL) {
1485                 FreeXid(xid);
1486                 return -ENOMEM;
1487         }
1488         cifsInode = CIFS_I(direntry->d_inode);
1489
1490         /* BB check if we need to refresh inode from server now ? BB */
1491
1492         if (attrs->ia_valid & ATTR_SIZE) {
1493                 /*
1494                    Flush data before changing file size on server. If the
1495                    flush returns error, store it to report later and continue.
1496                    BB: This should be smarter. Why bother flushing pages that
1497                    will be truncated anyway? Also, should we error out here if
1498                    the flush returns error?
1499                  */
1500                 rc = filemap_write_and_wait(direntry->d_inode->i_mapping);
1501                 if (rc != 0) {
1502                         CIFS_I(direntry->d_inode)->write_behind_rc = rc;
1503                         rc = 0;
1504                 }
1505
1506                 /* To avoid spurious oplock breaks from server, in the case of
1507                    inodes that we already have open, avoid doing path based
1508                    setting of file size if we can do it by handle.
1509                    This keeps our caching token (oplock) and avoids timeouts
1510                    when the local oplock break takes longer to flush
1511                    writebehind data than the SMB timeout for the SetPathInfo
1512                    request would allow */
1513
1514                 open_file = find_writable_file(cifsInode);
1515                 if (open_file) {
1516                         __u16 nfid = open_file->netfid;
1517                         __u32 npid = open_file->pid;
1518                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1519                                                 nfid, npid, FALSE);
1520                         atomic_dec(&open_file->wrtPending);
1521                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1522                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1523                                 unsigned int bytes_written;
1524                                 rc = CIFSSMBWrite(xid, pTcon,
1525                                                   nfid, 0, attrs->ia_size,
1526                                                   &bytes_written, NULL, NULL,
1527                                                   1 /* 45 seconds */);
1528                                 cFYI(1, ("Wrt seteof rc %d", rc));
1529                         }
1530                 } else
1531                         rc = -EINVAL;
1532
1533                 if (rc != 0) {
1534                         /* Set file size by pathname rather than by handle
1535                            either because no valid, writeable file handle for
1536                            it was found or because there was an error setting
1537                            it by handle */
1538                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1539                                            attrs->ia_size, FALSE,
1540                                            cifs_sb->local_nls,
1541                                            cifs_sb->mnt_cifs_flags &
1542                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1543                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1544                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1545                                 __u16 netfid;
1546                                 int oplock = FALSE;
1547
1548                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1549                                         FILE_OPEN,
1550                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1551                                         CREATE_NOT_DIR, &netfid, &oplock,
1552                                         NULL, cifs_sb->local_nls,
1553                                         cifs_sb->mnt_cifs_flags &
1554                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1555                                 if (rc == 0) {
1556                                         unsigned int bytes_written;
1557                                         rc = CIFSSMBWrite(xid, pTcon,
1558                                                         netfid, 0,
1559                                                         attrs->ia_size,
1560                                                         &bytes_written, NULL,
1561                                                         NULL, 1 /* 45 sec */);
1562                                         cFYI(1, ("wrt seteof rc %d", rc));
1563                                         CIFSSMBClose(xid, pTcon, netfid);
1564                                 }
1565
1566                         }
1567                 }
1568
1569                 /* Server is ok setting allocation size implicitly - no need
1570                    to call:
1571                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1572                          cifs_sb->local_nls);
1573                    */
1574
1575                 if (rc == 0) {
1576                         rc = cifs_vmtruncate(direntry->d_inode, attrs->ia_size);
1577                         cifs_truncate_page(direntry->d_inode->i_mapping,
1578                                            direntry->d_inode->i_size);
1579                 } else
1580                         goto cifs_setattr_exit;
1581         }
1582         if (attrs->ia_valid & ATTR_UID) {
1583                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1584                 uid = attrs->ia_uid;
1585         }
1586         if (attrs->ia_valid & ATTR_GID) {
1587                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1588                 gid = attrs->ia_gid;
1589         }
1590
1591         time_buf.Attributes = 0;
1592
1593         /* skip mode change if it's just for clearing setuid/setgid */
1594         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1595                 attrs->ia_valid &= ~ATTR_MODE;
1596
1597         if (attrs->ia_valid & ATTR_MODE) {
1598                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1599                 mode = attrs->ia_mode;
1600         }
1601
1602         if ((pTcon->unix_ext)
1603             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1604                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1605                                          0 /* dev_t */, cifs_sb->local_nls,
1606                                          cifs_sb->mnt_cifs_flags &
1607                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1608         else if (attrs->ia_valid & ATTR_MODE) {
1609                 rc = 0;
1610                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1611                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1612                                 set_dosattr = TRUE;
1613                                 time_buf.Attributes =
1614                                         cpu_to_le32(cifsInode->cifsAttrs |
1615                                                     ATTR_READONLY);
1616                         }
1617                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1618                         /* If file is readonly on server, we would
1619                         not be able to write to it - so if any write
1620                         bit is enabled for user or group or other we
1621                         need to at least try to remove r/o dos attr */
1622                         set_dosattr = TRUE;
1623                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1624                                             (~ATTR_READONLY));
1625                         /* Windows ignores set to zero */
1626                         if (time_buf.Attributes == 0)
1627                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1628                 }
1629                 /* BB to be implemented -
1630                    via Windows security descriptors or streams */
1631                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1632                                       cifs_sb->local_nls); */
1633         }
1634
1635         if (attrs->ia_valid & ATTR_ATIME) {
1636                 set_time = TRUE;
1637                 time_buf.LastAccessTime =
1638                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1639         } else
1640                 time_buf.LastAccessTime = 0;
1641
1642         if (attrs->ia_valid & ATTR_MTIME) {
1643                 set_time = TRUE;
1644                 time_buf.LastWriteTime =
1645                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1646         } else
1647                 time_buf.LastWriteTime = 0;
1648         /* Do not set ctime explicitly unless other time
1649            stamps are changed explicitly (i.e. by utime()
1650            since we would then have a mix of client and
1651            server times */
1652
1653         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1654                 set_time = TRUE;
1655                 /* Although Samba throws this field away
1656                 it may be useful to Windows - but we do
1657                 not want to set ctime unless some other
1658                 timestamp is changing */
1659                 cFYI(1, ("CIFS - CTIME changed"));
1660                 time_buf.ChangeTime =
1661                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1662         } else
1663                 time_buf.ChangeTime = 0;
1664
1665         if (set_time || set_dosattr) {
1666                 time_buf.CreationTime = 0;      /* do not change */
1667                 /* In the future we should experiment - try setting timestamps
1668                    via Handle (SetFileInfo) instead of by path */
1669                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1670                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1671                                              cifs_sb->local_nls,
1672                                              cifs_sb->mnt_cifs_flags &
1673                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1674                 else
1675                         rc = -EOPNOTSUPP;
1676
1677                 if (rc == -EOPNOTSUPP) {
1678                         int oplock = FALSE;
1679                         __u16 netfid;
1680
1681                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1682                                  "times not supported by this server"));
1683                         /* BB we could scan to see if we already have it open
1684                            and pass in pid of opener to function */
1685                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1686                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1687                                          CREATE_NOT_DIR, &netfid, &oplock,
1688                                          NULL, cifs_sb->local_nls,
1689                                          cifs_sb->mnt_cifs_flags &
1690                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1691                         if (rc == 0) {
1692                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1693                                                          netfid);
1694                                 CIFSSMBClose(xid, pTcon, netfid);
1695                         } else {
1696                         /* BB For even older servers we could convert time_buf
1697                            into old DOS style which uses two second
1698                            granularity */
1699
1700                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1701                                         &time_buf, cifs_sb->local_nls); */
1702                         }
1703                 }
1704                 /* Even if error on time set, no sense failing the call if
1705                 the server would set the time to a reasonable value anyway,
1706                 and this check ensures that we are not being called from
1707                 sys_utimes in which case we ought to fail the call back to
1708                 the user when the server rejects the call */
1709                 if ((rc) && (attrs->ia_valid &
1710                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1711                         rc = 0;
1712         }
1713
1714         /* do not need local check to inode_check_ok since the server does
1715            that */
1716         if (!rc)
1717                 rc = inode_setattr(direntry->d_inode, attrs);
1718 cifs_setattr_exit:
1719         kfree(full_path);
1720         FreeXid(xid);
1721         return rc;
1722 }
1723
1724 #if 0
1725 void cifs_delete_inode(struct inode *inode)
1726 {
1727         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1728         /* may have to add back in if and when safe distributed caching of
1729            directories added e.g. via FindNotify */
1730 }
1731 #endif