err.no Git - linux-2.6/blob - 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
  33 static void cifs_set_ops(struct inode *inode, const bool is_dfs_referral)
  34 {
  35         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
  36
  37         switch (inode->i_mode & S_IFMT) {
  38         case S_IFREG:
  39                 inode->i_op = &cifs_file_inode_ops;
  40                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
  41                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
  42                                 inode->i_fop = &cifs_file_direct_nobrl_ops;
  43                         else
  44                                 inode->i_fop = &cifs_file_direct_ops;
  45                 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
  46                         inode->i_fop = &cifs_file_nobrl_ops;
  47                 else { /* not direct, send byte range locks */
  48                         inode->i_fop = &cifs_file_ops;
  49                 }
  50
  51
  52                 /* check if server can support readpages */
  53                 if (cifs_sb->tcon->ses->server->maxBuf <
  54                                 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
  55                         inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
  56                 else
  57                         inode->i_data.a_ops = &cifs_addr_ops;
  58                 break;
  59         case S_IFDIR:
  60 #ifdef CONFIG_CIFS_DFS_UPCALL
  61                 if (is_dfs_referral) {
  62                         inode->i_op = &cifs_dfs_referral_inode_operations;
  63                 } else {
  64 #else /* NO DFS support, treat as a directory */
  65                 {
  66 #endif
  67                         inode->i_op = &cifs_dir_inode_ops;
  68                         inode->i_fop = &cifs_dir_ops;
  69                 }
  70                 break;
  71         case S_IFLNK:
  72                 inode->i_op = &cifs_symlink_inode_ops;
  73                 break;
  74         default:
  75                 init_special_inode(inode, inode->i_mode, inode->i_rdev);
  76                 break;
  77         }
  78 }
  79
  80 static void cifs_unix_info_to_inode(struct inode *inode,
  81                 FILE_UNIX_BASIC_INFO *info, int force_uid_gid)
  82 {
  83         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
  84         struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
  85         __u64 num_of_bytes = le64_to_cpu(info->NumOfBytes);
  86         __u64 end_of_file = le64_to_cpu(info->EndOfFile);
  87
  88         inode->i_atime = cifs_NTtimeToUnix(le64_to_cpu(info->LastAccessTime));
  89         inode->i_mtime =
  90                 cifs_NTtimeToUnix(le64_to_cpu(info->LastModificationTime));
  91         inode->i_ctime = cifs_NTtimeToUnix(le64_to_cpu(info->LastStatusChange));
  92         inode->i_mode = le64_to_cpu(info->Permissions);
  93
  94         /*
  95          * Since we set the inode type below we need to mask off
  96          * to avoid strange results if bits set above.
  97          */
  98         inode->i_mode &= ~S_IFMT;
  99         switch (le32_to_cpu(info->Type)) {
 100         case UNIX_FILE:
 101                 inode->i_mode |= S_IFREG;
 102                 break;
 103         case UNIX_SYMLINK:
 104                 inode->i_mode |= S_IFLNK;
 105                 break;
 106         case UNIX_DIR:
 107                 inode->i_mode |= S_IFDIR;
 108                 break;
 109         case UNIX_CHARDEV:
 110                 inode->i_mode |= S_IFCHR;
 111                 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
 112                                       le64_to_cpu(info->DevMinor) & MINORMASK);
 113                 break;
 114         case UNIX_BLOCKDEV:
 115                 inode->i_mode |= S_IFBLK;
 116                 inode->i_rdev = MKDEV(le64_to_cpu(info->DevMajor),
 117                                       le64_to_cpu(info->DevMinor) & MINORMASK);
 118                 break;
 119         case UNIX_FIFO:
 120                 inode->i_mode |= S_IFIFO;
 121                 break;
 122         case UNIX_SOCKET:
 123                 inode->i_mode |= S_IFSOCK;
 124                 break;
 125         default:
 126                 /* safest to call it a file if we do not know */
 127                 inode->i_mode |= S_IFREG;
 128                 cFYI(1, ("unknown type %d", le32_to_cpu(info->Type)));
 129                 break;
 130         }
 131
 132         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) &&
 133             !force_uid_gid)
 134                 inode->i_uid = cifs_sb->mnt_uid;
 135         else
 136                 inode->i_uid = le64_to_cpu(info->Uid);
 137
 138         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) &&
 139             !force_uid_gid)
 140                 inode->i_gid = cifs_sb->mnt_gid;
 141         else
 142                 inode->i_gid = le64_to_cpu(info->Gid);
 143
 144         inode->i_nlink = le64_to_cpu(info->Nlinks);
 145
 146         spin_lock(&inode->i_lock);
 147         if (is_size_safe_to_change(cifsInfo, end_of_file)) {
 148                 /*
 149                  * We can not safely change the file size here if the client
 150                  * is writing to it due to potential races.
 151                  */
 152                 i_size_write(inode, end_of_file);
 153
 154                 /*
 155                  * i_blocks is not related to (i_size / i_blksize),
 156                  * but instead 512 byte (2**9) size is required for
 157                  * calculating num blocks.
 158                  */
 159                 inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 160         }
 161         spin_unlock(&inode->i_lock);
 162 }
 163
 164
 165 /*
 166  *      Needed to setup inode data for the directory which is the
 167  *      junction to the new submount (ie to setup the fake directory
 168  *      which represents a DFS referral)
 169  */
 170 static void fill_fake_finddataunix(FILE_UNIX_BASIC_INFO *pfnd_dat,
 171                                struct super_block *sb)
 172 {
 173         struct inode *pinode = NULL;
 174
 175         memset(pfnd_dat, 0, sizeof(FILE_UNIX_BASIC_INFO));
 176
 177 /*      __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
 178         __le64 pfnd_dat->NumOfBytes = cpu_to_le64(0);
 179         __u64 UniqueId = 0;  */
 180         pfnd_dat->LastStatusChange =
 181                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 182         pfnd_dat->LastAccessTime =
 183                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 184         pfnd_dat->LastModificationTime =
 185                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 186         pfnd_dat->Type = cpu_to_le32(UNIX_DIR);
 187         pfnd_dat->Permissions = cpu_to_le64(S_IXUGO | S_IRWXU);
 188         pfnd_dat->Nlinks = cpu_to_le64(2);
 189         if (sb->s_root)
 190                 pinode = sb->s_root->d_inode;
 191         if (pinode == NULL)
 192                 return;
 193
 194         /* fill in default values for the remaining based on root
 195            inode since we can not query the server for this inode info */
 196         pfnd_dat->DevMajor = cpu_to_le64(MAJOR(pinode->i_rdev));
 197         pfnd_dat->DevMinor = cpu_to_le64(MINOR(pinode->i_rdev));
 198         pfnd_dat->Uid = cpu_to_le64(pinode->i_uid);
 199         pfnd_dat->Gid = cpu_to_le64(pinode->i_gid);
 200 }
 201
 202 int cifs_get_inode_info_unix(struct inode **pinode,
 203         const unsigned char *full_path, struct super_block *sb, int xid)
 204 {
 205         int rc = 0;
 206         FILE_UNIX_BASIC_INFO find_data;
 207         struct cifsTconInfo *pTcon;
 208         struct inode *inode;
 209         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 210         bool is_dfs_referral = false;
 211         struct cifsInodeInfo *cifsInfo;
 212         __u64 num_of_bytes;
 213         __u64 end_of_file;
 214
 215         pTcon = cifs_sb->tcon;
 216         cFYI(1, ("Getting info on %s", full_path));
 217
 218         /* could have done a find first instead but this returns more info */
 219         rc = CIFSSMBUnixQPathInfo(xid, pTcon, full_path, &find_data,
 220                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 221                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 222         if (rc) {
 223                 if (rc == -EREMOTE && !is_dfs_referral) {
 224                         is_dfs_referral = true;
 225                         cFYI(DBG2, ("DFS ref"));
 226                         /* for DFS, server does not give us real inode data */
 227                         fill_fake_finddataunix(&find_data, sb);
 228                         rc = 0;
 229                 }
 230         }
 231         num_of_bytes = le64_to_cpu(find_data.NumOfBytes);
 232         end_of_file = le64_to_cpu(find_data.EndOfFile);
 233
 234         /* get new inode */
 235         if (*pinode == NULL) {
 236                 *pinode = new_inode(sb);
 237                 if (*pinode == NULL) {
 238                         rc = -ENOMEM;
 239                 goto cgiiu_exit;
 240                 }
 241                 /* Is an i_ino of zero legal? */
 242                 /* note ino incremented to unique num in new_inode */
 243                 /* Are there sanity checks we can use to ensure that
 244                    the server is really filling in that field? */
 245                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
 246                         (*pinode)->i_ino = (unsigned long)find_data.UniqueId;
 247
 248                 if (sb->s_flags & MS_NOATIME)
 249                         (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 250
 251                 insert_inode_hash(*pinode);
 252         }
 253
 254         inode = *pinode;
 255         cifsInfo = CIFS_I(inode);
 256
 257         cFYI(1, ("Old time %ld", cifsInfo->time));
 258         cifsInfo->time = jiffies;
 259         cFYI(1, ("New time %ld", cifsInfo->time));
 260         /* this is ok to set on every inode revalidate */
 261         atomic_set(&cifsInfo->inUse, 1);
 262
 263         cifs_unix_info_to_inode(inode, &find_data, 0);
 264
 265         if (num_of_bytes < end_of_file)
 266                 cFYI(1, ("allocation size less than end of file"));
 267         cFYI(1, ("Size %ld and blocks %llu",
 268                 (unsigned long) inode->i_size,
 269                 (unsigned long long)inode->i_blocks));
 270
 271         cifs_set_ops(inode, is_dfs_referral);
 272 cgiiu_exit:
 273         return rc;
 274 }
 275
 276 static int decode_sfu_inode(struct inode *inode, __u64 size,
 277                             const unsigned char *path,
 278                             struct cifs_sb_info *cifs_sb, int xid)
 279 {
 280         int rc;
 281         int oplock = 0;
 282         __u16 netfid;
 283         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 284         char buf[24];
 285         unsigned int bytes_read;
 286         char *pbuf;
 287
 288         pbuf = buf;
 289
 290         if (size == 0) {
 291                 inode->i_mode |= S_IFIFO;
 292                 return 0;
 293         } else if (size < 8) {
 294                 return -EINVAL;  /* EOPNOTSUPP? */
 295         }
 296
 297         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 298                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 299                          cifs_sb->local_nls,
 300                          cifs_sb->mnt_cifs_flags &
 301                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 302         if (rc == 0) {
 303                 int buf_type = CIFS_NO_BUFFER;
 304                         /* Read header */
 305                 rc = CIFSSMBRead(xid, pTcon,
 306                                  netfid,
 307                                  24 /* length */, 0 /* offset */,
 308                                  &bytes_read, &pbuf, &buf_type);
 309                 if ((rc == 0) && (bytes_read >= 8)) {
 310                         if (memcmp("IntxBLK", pbuf, 8) == 0) {
 311                                 cFYI(1, ("Block device"));
 312                                 inode->i_mode |= S_IFBLK;
 313                                 if (bytes_read == 24) {
 314                                         /* we have enough to decode dev num */
 315                                         __u64 mjr; /* major */
 316                                         __u64 mnr; /* minor */
 317                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 318                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 319                                         inode->i_rdev = MKDEV(mjr, mnr);
 320                                 }
 321                         } else if (memcmp("IntxCHR", pbuf, 8) == 0) {
 322                                 cFYI(1, ("Char device"));
 323                                 inode->i_mode |= S_IFCHR;
 324                                 if (bytes_read == 24) {
 325                                         /* we have enough to decode dev num */
 326                                         __u64 mjr; /* major */
 327                                         __u64 mnr; /* minor */
 328                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 329                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 330                                         inode->i_rdev = MKDEV(mjr, mnr);
 331                                 }
 332                         } else if (memcmp("IntxLNK", pbuf, 7) == 0) {
 333                                 cFYI(1, ("Symlink"));
 334                                 inode->i_mode |= S_IFLNK;
 335                         } else {
 336                                 inode->i_mode |= S_IFREG; /* file? */
 337                                 rc = -EOPNOTSUPP;
 338                         }
 339                 } else {
 340                         inode->i_mode |= S_IFREG; /* then it is a file */
 341                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 342                 }
 343                 CIFSSMBClose(xid, pTcon, netfid);
 344         }
 345         return rc;
 346 }
 347
 348 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 349
 350 static int get_sfu_mode(struct inode *inode,
 351                         const unsigned char *path,
 352                         struct cifs_sb_info *cifs_sb, int xid)
 353 {
 354 #ifdef CONFIG_CIFS_XATTR
 355         ssize_t rc;
 356         char ea_value[4];
 357         __u32 mode;
 358
 359         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 360                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 361                 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 362         if (rc < 0)
 363                 return (int)rc;
 364         else if (rc > 3) {
 365                 mode = le32_to_cpu(*((__le32 *)ea_value));
 366                 inode->i_mode &= ~SFBITS_MASK;
 367                 cFYI(1, ("special bits 0%o org mode 0%o", mode, inode->i_mode));
 368                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 369                 cFYI(1, ("special mode bits 0%o", mode));
 370                 return 0;
 371         } else {
 372                 return 0;
 373         }
 374 #else
 375         return -EOPNOTSUPP;
 376 #endif
 377 }
 378
 379 /*
 380  *      Needed to setup inode data for the directory which is the
 381  *      junction to the new submount (ie to setup the fake directory
 382  *      which represents a DFS referral)
 383  */
 384 static void fill_fake_finddata(FILE_ALL_INFO *pfnd_dat,
 385                                struct super_block *sb)
 386 {
 387         memset(pfnd_dat, 0, sizeof(FILE_ALL_INFO));
 388
 389 /*      __le64 pfnd_dat->AllocationSize = cpu_to_le64(0);
 390         __le64 pfnd_dat->EndOfFile = cpu_to_le64(0);
 391         __u8 pfnd_dat->DeletePending = 0;
 392         __u8 pfnd_data->Directory = 0;
 393         __le32 pfnd_dat->EASize = 0;
 394         __u64 pfnd_dat->IndexNumber = 0;
 395         __u64 pfnd_dat->IndexNumber1 = 0;  */
 396         pfnd_dat->CreationTime =
 397                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 398         pfnd_dat->LastAccessTime =
 399                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 400         pfnd_dat->LastWriteTime =
 401                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 402         pfnd_dat->ChangeTime =
 403                 cpu_to_le64(cifs_UnixTimeToNT(CURRENT_TIME));
 404         pfnd_dat->Attributes = cpu_to_le32(ATTR_DIRECTORY);
 405         pfnd_dat->NumberOfLinks = cpu_to_le32(2);
 406 }
 407
 408 int cifs_get_inode_info(struct inode **pinode,
 409         const unsigned char *full_path, FILE_ALL_INFO *pfindData,
 410         struct super_block *sb, int xid, const __u16 *pfid)
 411 {
 412         int rc = 0;
 413         __u32 attr;
 414         struct cifsInodeInfo *cifsInfo;
 415         struct cifsTconInfo *pTcon;
 416         struct inode *inode;
 417         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 418         char *buf = NULL;
 419         bool adjustTZ = false;
 420         bool is_dfs_referral = false;
 421         umode_t default_mode;
 422
 423         pTcon = cifs_sb->tcon;
 424         cFYI(1, ("Getting info on %s", full_path));
 425
 426         if ((pfindData == NULL) && (*pinode != NULL)) {
 427                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 428                         cFYI(1, ("No need to revalidate cached inode sizes"));
 429                         return rc;
 430                 }
 431         }
 432
 433         /* if file info not passed in then get it from server */
 434         if (pfindData == NULL) {
 435                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 436                 if (buf == NULL)
 437                         return -ENOMEM;
 438                 pfindData = (FILE_ALL_INFO *)buf;
 439
 440                 /* could do find first instead but this returns more info */
 441                 rc = CIFSSMBQPathInfo(xid, pTcon, full_path, pfindData,
 442                               0 /* not legacy */,
 443                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 444                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 445                 /* BB optimize code so we do not make the above call
 446                 when server claims no NT SMB support and the above call
 447                 failed at least once - set flag in tcon or mount */
 448                 if ((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 449                         rc = SMBQueryInformation(xid, pTcon, full_path,
 450                                         pfindData, cifs_sb->local_nls,
 451                                         cifs_sb->mnt_cifs_flags &
 452                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 453                         adjustTZ = true;
 454                 }
 455         }
 456         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 457         if (rc == -EREMOTE) {
 458                 is_dfs_referral = true;
 459                 fill_fake_finddata(pfindData, sb);
 460                 rc = 0;
 461         } else if (rc)
 462                 goto cgii_exit;
 463
 464         attr = le32_to_cpu(pfindData->Attributes);
 465
 466         /* get new inode */
 467         if (*pinode == NULL) {
 468                 *pinode = new_inode(sb);
 469                 if (*pinode == NULL) {
 470                         rc = -ENOMEM;
 471                         goto cgii_exit;
 472                 }
 473                 /* Is an i_ino of zero legal? Can we use that to check
 474                    if the server supports returning inode numbers?  Are
 475                    there other sanity checks we can use to ensure that
 476                    the server is really filling in that field? */
 477
 478                 /* We can not use the IndexNumber field by default from
 479                    Windows or Samba (in ALL_INFO buf) but we can request
 480                    it explicitly.  It may not be unique presumably if
 481                    the server has multiple devices mounted under one share */
 482
 483                 /* There may be higher info levels that work but are
 484                    there Windows server or network appliances for which
 485                    IndexNumber field is not guaranteed unique? */
 486
 487                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 488                         int rc1 = 0;
 489                         __u64 inode_num;
 490
 491                         rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 492                                         full_path, &inode_num,
 493                                         cifs_sb->local_nls,
 494                                         cifs_sb->mnt_cifs_flags &
 495                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 496                         if (rc1) {
 497                                 cFYI(1, ("GetSrvInodeNum rc %d", rc1));
 498                                 /* BB EOPNOSUPP disable SERVER_INUM? */
 499                         } else /* do we need cast or hash to ino? */
 500                                 (*pinode)->i_ino = inode_num;
 501                 } /* else ino incremented to unique num in new_inode*/
 502                 if (sb->s_flags & MS_NOATIME)
 503                         (*pinode)->i_flags |= S_NOATIME | S_NOCMTIME;
 504                 insert_inode_hash(*pinode);
 505         }
 506         inode = *pinode;
 507         cifsInfo = CIFS_I(inode);
 508         cifsInfo->cifsAttrs = attr;
 509         cFYI(1, ("Old time %ld", cifsInfo->time));
 510         cifsInfo->time = jiffies;
 511         cFYI(1, ("New time %ld", cifsInfo->time));
 512
 513         /* blksize needs to be multiple of two. So safer to default to
 514         blksize and blkbits set in superblock so 2**blkbits and blksize
 515         will match rather than setting to:
 516         (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 517
 518         /* Linux can not store file creation time so ignore it */
 519         if (pfindData->LastAccessTime)
 520                 inode->i_atime = cifs_NTtimeToUnix
 521                         (le64_to_cpu(pfindData->LastAccessTime));
 522         else /* do not need to use current_fs_time - time not stored */
 523                 inode->i_atime = CURRENT_TIME;
 524         inode->i_mtime =
 525                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 526         inode->i_ctime =
 527             cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 528         cFYI(DBG2, ("Attributes came in as 0x%x", attr));
 529         if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) {
 530                 inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj;
 531                 inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj;
 532         }
 533
 534         /* get default inode mode */
 535         if (attr & ATTR_DIRECTORY)
 536                 default_mode = cifs_sb->mnt_dir_mode;
 537         else
 538                 default_mode = cifs_sb->mnt_file_mode;
 539
 540         /* set permission bits */
 541         if (atomic_read(&cifsInfo->inUse) == 0 ||
 542             (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
 543                 inode->i_mode = default_mode;
 544         else {
 545                 /* just reenable write bits if !ATTR_READONLY */
 546                 if ((inode->i_mode & S_IWUGO) == 0 &&
 547                     (attr & ATTR_READONLY) == 0)
 548                         inode->i_mode |= (S_IWUGO & default_mode);
 549                         inode->i_mode &= ~S_IFMT;
 550         }
 551         /* clear write bits if ATTR_READONLY is set */
 552         if (attr & ATTR_READONLY)
 553                 inode->i_mode &= ~S_IWUGO;
 554
 555         /* set inode type */
 556         if ((attr & ATTR_SYSTEM) &&
 557             (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
 558                 /* no need to fix endianness on 0 */
 559                 if (pfindData->EndOfFile == 0)
 560                         inode->i_mode |= S_IFIFO;
 561                 else if (decode_sfu_inode(inode,
 562                                 le64_to_cpu(pfindData->EndOfFile),
 563                                 full_path, cifs_sb, xid))
 564                         cFYI(1, ("unknown SFU file type\n"));
 565         } else {
 566                 if (attr & ATTR_DIRECTORY)
 567                         inode->i_mode |= S_IFDIR;
 568                 else
 569                         inode->i_mode |= S_IFREG;
 570         }
 571
 572         spin_lock(&inode->i_lock);
 573         if (is_size_safe_to_change(cifsInfo,
 574                                    le64_to_cpu(pfindData->EndOfFile))) {
 575                 /* can not safely shrink the file size here if the
 576                    client is writing to it due to potential races */
 577                 i_size_write(inode, le64_to_cpu(pfindData->EndOfFile));
 578
 579                 /* 512 bytes (2**9) is the fake blocksize that must be
 580                    used for this calculation */
 581                 inode->i_blocks = (512 - 1 + le64_to_cpu(
 582                                    pfindData->AllocationSize)) >> 9;
 583         }
 584         spin_unlock(&inode->i_lock);
 585
 586         inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 587
 588         /* BB fill in uid and gid here? with help from winbind?
 589            or retrieve from NTFS stream extended attribute */
 590 #ifdef CONFIG_CIFS_EXPERIMENTAL
 591         /* fill in 0777 bits from ACL */
 592         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
 593                 cFYI(1, ("Getting mode bits from ACL"));
 594                 acl_to_uid_mode(inode, full_path, pfid);
 595         }
 596 #endif
 597         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 598                 /* fill in remaining high mode bits e.g. SUID, VTX */
 599                 get_sfu_mode(inode, full_path, cifs_sb, xid);
 600         } else if (atomic_read(&cifsInfo->inUse) == 0) {
 601                 inode->i_uid = cifs_sb->mnt_uid;
 602                 inode->i_gid = cifs_sb->mnt_gid;
 603                 /* set so we do not keep refreshing these fields with
 604                    bad data after user has changed them in memory */
 605                 atomic_set(&cifsInfo->inUse, 1);
 606         }
 607
 608         cifs_set_ops(inode, is_dfs_referral);
 609
 610
 611
 612
 613 cgii_exit:
 614         kfree(buf);
 615         return rc;
 616 }
 617
 618 static const struct inode_operations cifs_ipc_inode_ops = {
 619         .lookup = cifs_lookup,
 620 };
 621
 622 /* gets root inode */
 623 struct inode *cifs_iget(struct super_block *sb, unsigned long ino)
 624 {
 625         int xid;
 626         struct cifs_sb_info *cifs_sb;
 627         struct inode *inode;
 628         long rc;
 629
 630         inode = iget_locked(sb, ino);
 631         if (!inode)
 632                 return ERR_PTR(-ENOMEM);
 633         if (!(inode->i_state & I_NEW))
 634                 return inode;
 635
 636         cifs_sb = CIFS_SB(inode->i_sb);
 637         xid = GetXid();
 638
 639         if (cifs_sb->tcon->unix_ext)
 640                 rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid);
 641         else
 642                 rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid,
 643                                          NULL);
 644         if (rc && cifs_sb->tcon->ipc) {
 645                 cFYI(1, ("ipc connection - fake read inode"));
 646                 inode->i_mode |= S_IFDIR;
 647                 inode->i_nlink = 2;
 648                 inode->i_op = &cifs_ipc_inode_ops;
 649                 inode->i_fop = &simple_dir_operations;
 650                 inode->i_uid = cifs_sb->mnt_uid;
 651                 inode->i_gid = cifs_sb->mnt_gid;
 652                 _FreeXid(xid);
 653                 iget_failed(inode);
 654                 return ERR_PTR(rc);
 655         }
 656
 657         unlock_new_inode(inode);
 658
 659         /* can not call macro FreeXid here since in a void func
 660          * TODO: This is no longer true
 661          */
 662         _FreeXid(xid);
 663         return inode;
 664 }
 665
 666 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 667 {
 668         int rc = 0;
 669         int xid;
 670         struct cifs_sb_info *cifs_sb;
 671         struct cifsTconInfo *pTcon;
 672         char *full_path = NULL;
 673         struct cifsInodeInfo *cifsInode;
 674         FILE_BASIC_INFO *pinfo_buf;
 675
 676         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 677
 678         xid = GetXid();
 679
 680         if (inode)
 681                 cifs_sb = CIFS_SB(inode->i_sb);
 682         else
 683                 cifs_sb = CIFS_SB(direntry->d_sb);
 684         pTcon = cifs_sb->tcon;
 685
 686         /* Unlink can be called from rename so we can not grab the sem here
 687            since we deadlock otherwise */
 688 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 689         full_path = build_path_from_dentry(direntry);
 690 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 691         if (full_path == NULL) {
 692                 FreeXid(xid);
 693                 return -ENOMEM;
 694         }
 695
 696         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 697                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 698                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 699                 rc = CIFSPOSIXDelFile(xid, pTcon, full_path,
 700                         SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls,
 701                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 702                 cFYI(1, ("posix del rc %d", rc));
 703                 if ((rc == 0) || (rc == -ENOENT))
 704                         goto psx_del_no_retry;
 705         }
 706
 707         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 708                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 709 psx_del_no_retry:
 710         if (!rc) {
 711                 if (direntry->d_inode)
 712                         drop_nlink(direntry->d_inode);
 713         } else if (rc == -ENOENT) {
 714                 d_drop(direntry);
 715         } else if (rc == -ETXTBSY) {
 716                 int oplock = 0;
 717                 __u16 netfid;
 718
 719                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 720                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 721                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 722                                  cifs_sb->mnt_cifs_flags &
 723                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 724                 if (rc == 0) {
 725                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 726                                               cifs_sb->local_nls,
 727                                               cifs_sb->mnt_cifs_flags &
 728                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 729                         CIFSSMBClose(xid, pTcon, netfid);
 730                         if (direntry->d_inode)
 731                                 drop_nlink(direntry->d_inode);
 732                 }
 733         } else if (rc == -EACCES) {
 734                 /* try only if r/o attribute set in local lookup data? */
 735                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 736                 if (pinfo_buf) {
 737                         /* ATTRS set to normal clears r/o bit */
 738                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 739                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 740                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 741                                                      pinfo_buf,
 742                                                      cifs_sb->local_nls,
 743                                                      cifs_sb->mnt_cifs_flags &
 744                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 745                         else
 746                                 rc = -EOPNOTSUPP;
 747
 748                         if (rc == -EOPNOTSUPP) {
 749                                 int oplock = 0;
 750                                 __u16 netfid;
 751                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 752                                                           full_path,
 753                                                           (__u16)ATTR_NORMAL,
 754                                                           cifs_sb->local_nls);
 755                            For some strange reason it seems that NT4 eats the
 756                            old setattr call without actually setting the
 757                            attributes so on to the third attempted workaround
 758                            */
 759
 760                         /* BB could scan to see if we already have it open
 761                            and pass in pid of opener to function */
 762                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 763                                                  FILE_OPEN, SYNCHRONIZE |
 764                                                  FILE_WRITE_ATTRIBUTES, 0,
 765                                                  &netfid, &oplock, NULL,
 766                                                  cifs_sb->local_nls,
 767                                                  cifs_sb->mnt_cifs_flags &
 768                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 769                                 if (rc == 0) {
 770                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 771                                                                  pinfo_buf,
 772                                                                  netfid);
 773                                         CIFSSMBClose(xid, pTcon, netfid);
 774                                 }
 775                         }
 776                         kfree(pinfo_buf);
 777                 }
 778                 if (rc == 0) {
 779                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 780                                             cifs_sb->local_nls,
 781                                             cifs_sb->mnt_cifs_flags &
 782                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 783                         if (!rc) {
 784                                 if (direntry->d_inode)
 785                                         drop_nlink(direntry->d_inode);
 786                         } else if (rc == -ETXTBSY) {
 787                                 int oplock = 0;
 788                                 __u16 netfid;
 789
 790                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 791                                                  FILE_OPEN, DELETE,
 792                                                  CREATE_NOT_DIR |
 793                                                  CREATE_DELETE_ON_CLOSE,
 794                                                  &netfid, &oplock, NULL,
 795                                                  cifs_sb->local_nls,
 796                                                  cifs_sb->mnt_cifs_flags &
 797                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 798                                 if (rc == 0) {
 799                                         CIFSSMBRenameOpenFile(xid, pTcon,
 800                                                 netfid, NULL,
 801                                                 cifs_sb->local_nls,
 802                                                 cifs_sb->mnt_cifs_flags &
 803                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 804                                         CIFSSMBClose(xid, pTcon, netfid);
 805                                         if (direntry->d_inode)
 806                                                 drop_nlink(direntry->d_inode);
 807                                 }
 808                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 809                         }
 810                 }
 811         }
 812         if (direntry->d_inode) {
 813                 cifsInode = CIFS_I(direntry->d_inode);
 814                 cifsInode->time = 0;    /* will force revalidate to get info
 815                                            when needed */
 816                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 817         }
 818         if (inode) {
 819                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 820                 cifsInode = CIFS_I(inode);
 821                 cifsInode->time = 0;    /* force revalidate of dir as well */
 822         }
 823
 824         kfree(full_path);
 825         FreeXid(xid);
 826         return rc;
 827 }
 828
 829 static void posix_fill_in_inode(struct inode *tmp_inode,
 830         FILE_UNIX_BASIC_INFO *pData, int isNewInode)
 831 {
 832         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 833         loff_t local_size;
 834         struct timespec local_mtime;
 835
 836         cifsInfo->time = jiffies;
 837         atomic_inc(&cifsInfo->inUse);
 838
 839         /* save mtime and size */
 840         local_mtime = tmp_inode->i_mtime;
 841         local_size  = tmp_inode->i_size;
 842
 843         cifs_unix_info_to_inode(tmp_inode, pData, 1);
 844         cifs_set_ops(tmp_inode, false);
 845
 846         if (!S_ISREG(tmp_inode->i_mode))
 847                 return;
 848
 849         /*
 850          * No sense invalidating pages for new inode
 851          * since we we have not started caching
 852          * readahead file data yet.
 853          */
 854         if (isNewInode)
 855                 return;
 856
 857         if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 858                 (local_size == tmp_inode->i_size)) {
 859                 cFYI(1, ("inode exists but unchanged"));
 860         } else {
 861                 /* file may have changed on server */
 862                 cFYI(1, ("invalidate inode, readdir detected change"));
 863                 invalidate_remote_inode(tmp_inode);
 864         }
 865 }
 866
 867 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 868 {
 869         int rc = 0;
 870         int xid;
 871         struct cifs_sb_info *cifs_sb;
 872         struct cifsTconInfo *pTcon;
 873         char *full_path = NULL;
 874         struct inode *newinode = NULL;
 875
 876         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 877
 878         xid = GetXid();
 879
 880         cifs_sb = CIFS_SB(inode->i_sb);
 881         pTcon = cifs_sb->tcon;
 882
 883         full_path = build_path_from_dentry(direntry);
 884         if (full_path == NULL) {
 885                 FreeXid(xid);
 886                 return -ENOMEM;
 887         }
 888
 889         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 890                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 891                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 892                 u32 oplock = 0;
 893                 FILE_UNIX_BASIC_INFO *pInfo =
 894                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 895                 if (pInfo == NULL) {
 896                         rc = -ENOMEM;
 897                         goto mkdir_out;
 898                 }
 899
 900                 mode &= ~current->fs->umask;
 901                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 902                                 mode, NULL /* netfid */, pInfo, &oplock,
 903                                 full_path, cifs_sb->local_nls,
 904                                 cifs_sb->mnt_cifs_flags &
 905                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 906                 if (rc == -EOPNOTSUPP) {
 907                         kfree(pInfo);
 908                         goto mkdir_retry_old;
 909                 } else if (rc) {
 910                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 911                         d_drop(direntry);
 912                 } else {
 913                         if (pInfo->Type == cpu_to_le32(-1)) {
 914                                 /* no return info, go query for it */
 915                                 kfree(pInfo);
 916                                 goto mkdir_get_info;
 917                         }
 918 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 919         to set uid/gid */
 920                         inc_nlink(inode);
 921                         if (pTcon->nocase)
 922                                 direntry->d_op = &cifs_ci_dentry_ops;
 923                         else
 924                                 direntry->d_op = &cifs_dentry_ops;
 925
 926                         newinode = new_inode(inode->i_sb);
 927                         if (newinode == NULL) {
 928                                 kfree(pInfo);
 929                                 goto mkdir_get_info;
 930                         }
 931                         /* Is an i_ino of zero legal? */
 932                         /* Are there sanity checks we can use to ensure that
 933                            the server is really filling in that field? */
 934                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 935                                 newinode->i_ino =
 936                                         (unsigned long)pInfo->UniqueId;
 937                         } /* note ino incremented to unique num in new_inode */
 938                         if (inode->i_sb->s_flags & MS_NOATIME)
 939                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 940                         newinode->i_nlink = 2;
 941
 942                         insert_inode_hash(newinode);
 943                         d_instantiate(direntry, newinode);
 944
 945                         /* we already checked in POSIXCreate whether
 946                            frame was long enough */
 947                         posix_fill_in_inode(direntry->d_inode,
 948                                         pInfo, 1 /* NewInode */);
 949 #ifdef CONFIG_CIFS_DEBUG2
 950                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 951                                 direntry, direntry->d_name.name, newinode));
 952
 953                         if (newinode->i_nlink != 2)
 954                                 cFYI(1, ("unexpected number of links %d",
 955                                         newinode->i_nlink));
 956 #endif
 957                 }
 958                 kfree(pInfo);
 959                 goto mkdir_out;
 960         }
 961 mkdir_retry_old:
 962         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 963         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 964                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 965         if (rc) {
 966                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 967                 d_drop(direntry);
 968         } else {
 969 mkdir_get_info:
 970                 inc_nlink(inode);
 971                 if (pTcon->unix_ext)
 972                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 973                                                       inode->i_sb, xid);
 974                 else
 975                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 976                                                  inode->i_sb, xid, NULL);
 977
 978                 if (pTcon->nocase)
 979                         direntry->d_op = &cifs_ci_dentry_ops;
 980                 else
 981                         direntry->d_op = &cifs_dentry_ops;
 982                 d_instantiate(direntry, newinode);
 983                  /* setting nlink not necessary except in cases where we
 984                   * failed to get it from the server or was set bogus */
 985                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
 986                                 direntry->d_inode->i_nlink = 2;
 987                 mode &= ~current->fs->umask;
 988                 if (pTcon->unix_ext) {
 989                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 990                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 991                                                     mode,
 992                                                     (__u64)current->fsuid,
 993                                                     (__u64)current->fsgid,
 994                                                     0 /* dev_t */,
 995                                                     cifs_sb->local_nls,
 996                                                     cifs_sb->mnt_cifs_flags &
 997                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 998                         } else {
 999                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
1000                                                     mode, (__u64)-1,
1001                                                     (__u64)-1, 0 /* dev_t */,
1002                                                     cifs_sb->local_nls,
1003                                                     cifs_sb->mnt_cifs_flags &
1004                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1005                         }
1006                 } else {
1007                         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1008                             (mode & S_IWUGO) == 0) {
1009                                 FILE_BASIC_INFO pInfo;
1010                                 memset(&pInfo, 0, sizeof(pInfo));
1011                                 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1012                                 CIFSSMBSetTimes(xid, pTcon, full_path,
1013                                                 &pInfo, cifs_sb->local_nls,
1014                                                 cifs_sb->mnt_cifs_flags &
1015                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1016                         }
1017                         if (direntry->d_inode) {
1018                                 direntry->d_inode->i_mode = mode;
1019                                 direntry->d_inode->i_mode |= S_IFDIR;
1020                                 if (cifs_sb->mnt_cifs_flags &
1021                                      CIFS_MOUNT_SET_UID) {
1022                                         direntry->d_inode->i_uid =
1023                                                 current->fsuid;
1024                                         direntry->d_inode->i_gid =
1025                                                 current->fsgid;
1026                                 }
1027                         }
1028                 }
1029         }
1030 mkdir_out:
1031         kfree(full_path);
1032         FreeXid(xid);
1033         return rc;
1034 }
1035
1036 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1037 {
1038         int rc = 0;
1039         int xid;
1040         struct cifs_sb_info *cifs_sb;
1041         struct cifsTconInfo *pTcon;
1042         char *full_path = NULL;
1043         struct cifsInodeInfo *cifsInode;
1044
1045         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1046
1047         xid = GetXid();
1048
1049         cifs_sb = CIFS_SB(inode->i_sb);
1050         pTcon = cifs_sb->tcon;
1051
1052         full_path = build_path_from_dentry(direntry);
1053         if (full_path == NULL) {
1054                 FreeXid(xid);
1055                 return -ENOMEM;
1056         }
1057
1058         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1059                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1060
1061         if (!rc) {
1062                 drop_nlink(inode);
1063                 spin_lock(&direntry->d_inode->i_lock);
1064                 i_size_write(direntry->d_inode, 0);
1065                 clear_nlink(direntry->d_inode);
1066                 spin_unlock(&direntry->d_inode->i_lock);
1067         }
1068
1069         cifsInode = CIFS_I(direntry->d_inode);
1070         cifsInode->time = 0;    /* force revalidate to go get info when
1071                                    needed */
1072         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1073                 current_fs_time(inode->i_sb);
1074
1075         kfree(full_path);
1076         FreeXid(xid);
1077         return rc;
1078 }
1079
1080 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1081         struct inode *target_inode, struct dentry *target_direntry)
1082 {
1083         char *fromName;
1084         char *toName;
1085         struct cifs_sb_info *cifs_sb_source;
1086         struct cifs_sb_info *cifs_sb_target;
1087         struct cifsTconInfo *pTcon;
1088         int xid;
1089         int rc = 0;
1090
1091         xid = GetXid();
1092
1093         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1094         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1095         pTcon = cifs_sb_source->tcon;
1096
1097         if (pTcon != cifs_sb_target->tcon) {
1098                 FreeXid(xid);
1099                 return -EXDEV;  /* BB actually could be allowed if same server,
1100                                    but different share.
1101                                    Might eventually add support for this */
1102         }
1103
1104         /* we already  have the rename sem so we do not need to grab it again
1105            here to protect the path integrity */
1106         fromName = build_path_from_dentry(source_direntry);
1107         toName = build_path_from_dentry(target_direntry);
1108         if ((fromName == NULL) || (toName == NULL)) {
1109                 rc = -ENOMEM;
1110                 goto cifs_rename_exit;
1111         }
1112
1113         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1114                            cifs_sb_source->local_nls,
1115                            cifs_sb_source->mnt_cifs_flags &
1116                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1117         if (rc == -EEXIST) {
1118                 /* check if they are the same file because rename of hardlinked
1119                    files is a noop */
1120                 FILE_UNIX_BASIC_INFO *info_buf_source;
1121                 FILE_UNIX_BASIC_INFO *info_buf_target;
1122
1123                 info_buf_source =
1124                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1125                 if (info_buf_source != NULL) {
1126                         info_buf_target = info_buf_source + 1;
1127                         if (pTcon->unix_ext)
1128                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1129                                         info_buf_source,
1130                                         cifs_sb_source->local_nls,
1131                                         cifs_sb_source->mnt_cifs_flags &
1132                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1133                         /* else rc is still EEXIST so will fall through to
1134                            unlink the target and retry rename */
1135                         if (rc == 0) {
1136                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1137                                                 info_buf_target,
1138                                                 cifs_sb_target->local_nls,
1139                                                 /* remap based on source sb */
1140                                                 cifs_sb_source->mnt_cifs_flags &
1141                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1142                         }
1143                         if ((rc == 0) &&
1144                             (info_buf_source->UniqueId ==
1145                              info_buf_target->UniqueId)) {
1146                         /* do not rename since the files are hardlinked which
1147                            is a noop */
1148                         } else {
1149                         /* we either can not tell the files are hardlinked
1150                            (as with Windows servers) or files are not
1151                            hardlinked so delete the target manually before
1152                            renaming to follow POSIX rather than Windows
1153                            semantics */
1154                                 cifs_unlink(target_inode, target_direntry);
1155                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1156                                                    toName,
1157                                                    cifs_sb_source->local_nls,
1158                                                    cifs_sb_source->mnt_cifs_flags
1159                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1160                         }
1161                         kfree(info_buf_source);
1162                 } /* if we can not get memory just leave rc as EEXIST */
1163         }
1164
1165         if (rc)
1166                 cFYI(1, ("rename rc %d", rc));
1167
1168         if ((rc == -EIO) || (rc == -EEXIST)) {
1169                 int oplock = 0;
1170                 __u16 netfid;
1171
1172                 /* BB FIXME Is Generic Read correct for rename? */
1173                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1174                    need to test renaming open directory, also GENERIC_READ
1175                    might not right be right access to request */
1176                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1177                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1178                                  cifs_sb_source->local_nls,
1179                                  cifs_sb_source->mnt_cifs_flags &
1180                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1181                 if (rc == 0) {
1182                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1183                                               cifs_sb_source->local_nls,
1184                                               cifs_sb_source->mnt_cifs_flags &
1185                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1186                         CIFSSMBClose(xid, pTcon, netfid);
1187                 }
1188         }
1189
1190 cifs_rename_exit:
1191         kfree(fromName);
1192         kfree(toName);
1193         FreeXid(xid);
1194         return rc;
1195 }
1196
1197 int cifs_revalidate(struct dentry *direntry)
1198 {
1199         int xid;
1200         int rc = 0, wbrc = 0;
1201         char *full_path;
1202         struct cifs_sb_info *cifs_sb;
1203         struct cifsInodeInfo *cifsInode;
1204         loff_t local_size;
1205         struct timespec local_mtime;
1206         bool invalidate_inode = false;
1207
1208         if (direntry->d_inode == NULL)
1209                 return -ENOENT;
1210
1211         cifsInode = CIFS_I(direntry->d_inode);
1212
1213         if (cifsInode == NULL)
1214                 return -ENOENT;
1215
1216         /* no sense revalidating inode info on file that no one can write */
1217         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1218                 return rc;
1219
1220         xid = GetXid();
1221
1222         cifs_sb = CIFS_SB(direntry->d_sb);
1223
1224         /* can not safely grab the rename sem here if rename calls revalidate
1225            since that would deadlock */
1226         full_path = build_path_from_dentry(direntry);
1227         if (full_path == NULL) {
1228                 FreeXid(xid);
1229                 return -ENOMEM;
1230         }
1231         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1232                  "jiffies %ld", full_path, direntry->d_inode,
1233                  direntry->d_inode->i_count.counter, direntry,
1234                  direntry->d_time, jiffies));
1235
1236         if (cifsInode->time == 0) {
1237                 /* was set to zero previously to force revalidate */
1238         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1239                    lookupCacheEnabled) {
1240                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1241                     (direntry->d_inode->i_nlink == 1)) {
1242                         kfree(full_path);
1243                         FreeXid(xid);
1244                         return rc;
1245                 } else {
1246                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1247                 }
1248         }
1249
1250         /* save mtime and size */
1251         local_mtime = direntry->d_inode->i_mtime;
1252         local_size = direntry->d_inode->i_size;
1253
1254         if (cifs_sb->tcon->unix_ext) {
1255                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1256                                               direntry->d_sb, xid);
1257                 if (rc) {
1258                         cFYI(1, ("error on getting revalidate info %d", rc));
1259 /*                      if (rc != -ENOENT)
1260                                 rc = 0; */      /* BB should we cache info on
1261                                                    certain errors? */
1262                 }
1263         } else {
1264                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1265                                          direntry->d_sb, xid, NULL);
1266                 if (rc) {
1267                         cFYI(1, ("error on getting revalidate info %d", rc));
1268 /*                      if (rc != -ENOENT)
1269                                 rc = 0; */      /* BB should we cache info on
1270                                                    certain errors? */
1271                 }
1272         }
1273         /* should we remap certain errors, access denied?, to zero */
1274
1275         /* if not oplocked, we invalidate inode pages if mtime or file size
1276            had changed on server */
1277
1278         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1279             (local_size == direntry->d_inode->i_size)) {
1280                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1281         } else {
1282                 /* file may have changed on server */
1283                 if (cifsInode->clientCanCacheRead) {
1284                         /* no need to invalidate inode pages since we were the
1285                            only ones who could have modified the file and the
1286                            server copy is staler than ours */
1287                 } else {
1288                         invalidate_inode = true;
1289                 }
1290         }
1291
1292         /* can not grab this sem since kernel filesys locking documentation
1293            indicates i_mutex may be taken by the kernel on lookup and rename
1294            which could deadlock if we grab the i_mutex here as well */
1295 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1296         /* need to write out dirty pages here  */
1297         if (direntry->d_inode->i_mapping) {
1298                 /* do we need to lock inode until after invalidate completes
1299                    below? */
1300                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1301                 if (wbrc)
1302                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1303         }
1304         if (invalidate_inode) {
1305         /* shrink_dcache not necessary now that cifs dentry ops
1306         are exported for negative dentries */
1307 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1308                         shrink_dcache_parent(direntry); */
1309                 if (S_ISREG(direntry->d_inode->i_mode)) {
1310                         if (direntry->d_inode->i_mapping)
1311                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1312                                 if (wbrc)
1313                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1314                         /* may eventually have to do this for open files too */
1315                         if (list_empty(&(cifsInode->openFileList))) {
1316                                 /* changed on server - flush read ahead pages */
1317                                 cFYI(1, ("Invalidating read ahead data on "
1318                                          "closed file"));
1319                                 invalidate_remote_inode(direntry->d_inode);
1320                         }
1321                 }
1322         }
1323 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1324
1325         kfree(full_path);
1326         FreeXid(xid);
1327         return rc;
1328 }
1329
1330 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1331         struct kstat *stat)
1332 {
1333         int err = cifs_revalidate(dentry);
1334         if (!err) {
1335                 generic_fillattr(dentry->d_inode, stat);
1336                 stat->blksize = CIFS_MAX_MSGSIZE;
1337         }
1338         return err;
1339 }
1340
1341 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1342 {
1343         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1344         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1345         struct page *page;
1346         int rc = 0;
1347
1348         page = grab_cache_page(mapping, index);
1349         if (!page)
1350                 return -ENOMEM;
1351
1352         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1353         unlock_page(page);
1354         page_cache_release(page);
1355         return rc;
1356 }
1357
1358 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1359 {
1360         struct address_space *mapping = inode->i_mapping;
1361         unsigned long limit;
1362
1363         spin_lock(&inode->i_lock);
1364         if (inode->i_size < offset)
1365                 goto do_expand;
1366         /*
1367          * truncation of in-use swapfiles is disallowed - it would cause
1368          * subsequent swapout to scribble on the now-freed blocks.
1369          */
1370         if (IS_SWAPFILE(inode)) {
1371                 spin_unlock(&inode->i_lock);
1372                 goto out_busy;
1373         }
1374         i_size_write(inode, offset);
1375         spin_unlock(&inode->i_lock);
1376         /*
1377          * unmap_mapping_range is called twice, first simply for efficiency
1378          * so that truncate_inode_pages does fewer single-page unmaps. However
1379          * after this first call, and before truncate_inode_pages finishes,
1380          * it is possible for private pages to be COWed, which remain after
1381          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1382          * call must be made for correctness.
1383          */
1384         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1385         truncate_inode_pages(mapping, offset);
1386         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1387         goto out_truncate;
1388
1389 do_expand:
1390         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1391         if (limit != RLIM_INFINITY && offset > limit) {
1392                 spin_unlock(&inode->i_lock);
1393                 goto out_sig;
1394         }
1395         if (offset > inode->i_sb->s_maxbytes) {
1396                 spin_unlock(&inode->i_lock);
1397                 goto out_big;
1398         }
1399         i_size_write(inode, offset);
1400         spin_unlock(&inode->i_lock);
1401 out_truncate:
1402         if (inode->i_op && inode->i_op->truncate)
1403                 inode->i_op->truncate(inode);
1404         return 0;
1405 out_sig:
1406         send_sig(SIGXFSZ, current, 0);
1407 out_big:
1408         return -EFBIG;
1409 out_busy:
1410         return -ETXTBSY;
1411 }
1412
1413 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1414 {
1415         int xid;
1416         struct cifs_sb_info *cifs_sb;
1417         struct cifsTconInfo *pTcon;
1418         char *full_path = NULL;
1419         int rc = -EACCES;
1420         struct cifsFileInfo *open_file = NULL;
1421         FILE_BASIC_INFO time_buf;
1422         bool set_time = false;
1423         bool set_dosattr = false;
1424         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1425         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1426         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1427         struct cifsInodeInfo *cifsInode;
1428         struct inode *inode = direntry->d_inode;
1429
1430         xid = GetXid();
1431
1432         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1433                  direntry->d_name.name, attrs->ia_valid));
1434
1435         cifs_sb = CIFS_SB(inode->i_sb);
1436         pTcon = cifs_sb->tcon;
1437
1438         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1439                 /* check if we have permission to change attrs */
1440                 rc = inode_change_ok(inode, attrs);
1441                 if (rc < 0) {
1442                         FreeXid(xid);
1443                         return rc;
1444                 } else
1445                         rc = 0;
1446         }
1447
1448         full_path = build_path_from_dentry(direntry);
1449         if (full_path == NULL) {
1450                 FreeXid(xid);
1451                 return -ENOMEM;
1452         }
1453         cifsInode = CIFS_I(inode);
1454
1455         if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1456                 /*
1457                    Flush data before changing file size or changing the last
1458                    write time of the file on the server. If the
1459                    flush returns error, store it to report later and continue.
1460                    BB: This should be smarter. Why bother flushing pages that
1461                    will be truncated anyway? Also, should we error out here if
1462                    the flush returns error?
1463                  */
1464                 rc = filemap_write_and_wait(inode->i_mapping);
1465                 if (rc != 0) {
1466                         cifsInode->write_behind_rc = rc;
1467                         rc = 0;
1468                 }
1469         }
1470
1471         if (attrs->ia_valid & ATTR_SIZE) {
1472                 /* To avoid spurious oplock breaks from server, in the case of
1473                    inodes that we already have open, avoid doing path based
1474                    setting of file size if we can do it by handle.
1475                    This keeps our caching token (oplock) and avoids timeouts
1476                    when the local oplock break takes longer to flush
1477                    writebehind data than the SMB timeout for the SetPathInfo
1478                    request would allow */
1479
1480                 open_file = find_writable_file(cifsInode);
1481                 if (open_file) {
1482                         __u16 nfid = open_file->netfid;
1483                         __u32 npid = open_file->pid;
1484                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1485                                                 nfid, npid, false);
1486                         atomic_dec(&open_file->wrtPending);
1487                         cFYI(1, ("SetFSize for attrs rc = %d", rc));
1488                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1489                                 unsigned int bytes_written;
1490                                 rc = CIFSSMBWrite(xid, pTcon,
1491                                                   nfid, 0, attrs->ia_size,
1492                                                   &bytes_written, NULL, NULL,
1493                                                   1 /* 45 seconds */);
1494                                 cFYI(1, ("Wrt seteof rc %d", rc));
1495                         }
1496                 } else
1497                         rc = -EINVAL;
1498
1499                 if (rc != 0) {
1500                         /* Set file size by pathname rather than by handle
1501                            either because no valid, writeable file handle for
1502                            it was found or because there was an error setting
1503                            it by handle */
1504                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1505                                            attrs->ia_size, false,
1506                                            cifs_sb->local_nls,
1507                                            cifs_sb->mnt_cifs_flags &
1508                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1509                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1510                         if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1511                                 __u16 netfid;
1512                                 int oplock = 0;
1513
1514                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1515                                         FILE_OPEN, GENERIC_WRITE,
1516                                         CREATE_NOT_DIR, &netfid, &oplock,
1517                                         NULL, cifs_sb->local_nls,
1518                                         cifs_sb->mnt_cifs_flags &
1519                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1520                                 if (rc == 0) {
1521                                         unsigned int bytes_written;
1522                                         rc = CIFSSMBWrite(xid, pTcon,
1523                                                         netfid, 0,
1524                                                         attrs->ia_size,
1525                                                         &bytes_written, NULL,
1526                                                         NULL, 1 /* 45 sec */);
1527                                         cFYI(1, ("wrt seteof rc %d", rc));
1528                                         CIFSSMBClose(xid, pTcon, netfid);
1529                                 }
1530
1531                         }
1532                 }
1533
1534                 /* Server is ok setting allocation size implicitly - no need
1535                    to call:
1536                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, true,
1537                          cifs_sb->local_nls);
1538                    */
1539
1540                 if (rc == 0) {
1541                         rc = cifs_vmtruncate(inode, attrs->ia_size);
1542                         cifs_truncate_page(inode->i_mapping, inode->i_size);
1543                 } else
1544                         goto cifs_setattr_exit;
1545         }
1546         if (attrs->ia_valid & ATTR_UID) {
1547                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1548                 uid = attrs->ia_uid;
1549         }
1550         if (attrs->ia_valid & ATTR_GID) {
1551                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1552                 gid = attrs->ia_gid;
1553         }
1554
1555         time_buf.Attributes = 0;
1556
1557         /* skip mode change if it's just for clearing setuid/setgid */
1558         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1559                 attrs->ia_valid &= ~ATTR_MODE;
1560
1561         if (attrs->ia_valid & ATTR_MODE) {
1562                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1563                 mode = attrs->ia_mode;
1564         }
1565
1566         if ((pTcon->unix_ext)
1567             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1568                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1569                                          0 /* dev_t */, cifs_sb->local_nls,
1570                                          cifs_sb->mnt_cifs_flags &
1571                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1572         else if (attrs->ia_valid & ATTR_MODE) {
1573                 rc = 0;
1574 #ifdef CONFIG_CIFS_EXPERIMENTAL
1575                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1576                         rc = mode_to_acl(inode, full_path, mode);
1577                 else if ((mode & S_IWUGO) == 0) {
1578 #else
1579                 if ((mode & S_IWUGO) == 0) {
1580 #endif
1581                         /* not writeable */
1582                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1583                                 set_dosattr = true;
1584                                 time_buf.Attributes =
1585                                         cpu_to_le32(cifsInode->cifsAttrs |
1586                                                     ATTR_READONLY);
1587                         }
1588                 } else if (cifsInode->cifsAttrs & ATTR_READONLY) {
1589                         /* If file is readonly on server, we would
1590                         not be able to write to it - so if any write
1591                         bit is enabled for user or group or other we
1592                         need to at least try to remove r/o dos attr */
1593                         set_dosattr = true;
1594                         time_buf.Attributes = cpu_to_le32(cifsInode->cifsAttrs &
1595                                             (~ATTR_READONLY));
1596                         /* Windows ignores set to zero */
1597                         if (time_buf.Attributes == 0)
1598                                 time_buf.Attributes |= cpu_to_le32(ATTR_NORMAL);
1599                 }
1600         }
1601
1602         if (attrs->ia_valid & ATTR_ATIME) {
1603                 set_time = true;
1604                 time_buf.LastAccessTime =
1605                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1606         } else
1607                 time_buf.LastAccessTime = 0;
1608
1609         if (attrs->ia_valid & ATTR_MTIME) {
1610                 set_time = true;
1611                 time_buf.LastWriteTime =
1612                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1613         } else
1614                 time_buf.LastWriteTime = 0;
1615         /* Do not set ctime explicitly unless other time
1616            stamps are changed explicitly (i.e. by utime()
1617            since we would then have a mix of client and
1618            server times */
1619
1620         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1621                 set_time = true;
1622                 /* Although Samba throws this field away
1623                 it may be useful to Windows - but we do
1624                 not want to set ctime unless some other
1625                 timestamp is changing */
1626                 cFYI(1, ("CIFS - CTIME changed"));
1627                 time_buf.ChangeTime =
1628                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1629         } else
1630                 time_buf.ChangeTime = 0;
1631
1632         if (set_time || set_dosattr) {
1633                 time_buf.CreationTime = 0;      /* do not change */
1634                 /* In the future we should experiment - try setting timestamps
1635                    via Handle (SetFileInfo) instead of by path */
1636                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1637                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1638                                              cifs_sb->local_nls,
1639                                              cifs_sb->mnt_cifs_flags &
1640                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1641                 else
1642                         rc = -EOPNOTSUPP;
1643
1644                 if (rc == -EOPNOTSUPP) {
1645                         int oplock = 0;
1646                         __u16 netfid;
1647
1648                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1649                                  "times not supported by this server"));
1650                         /* BB we could scan to see if we already have it open
1651                            and pass in pid of opener to function */
1652                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1653                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1654                                          CREATE_NOT_DIR, &netfid, &oplock,
1655                                          NULL, cifs_sb->local_nls,
1656                                          cifs_sb->mnt_cifs_flags &
1657                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1658                         if (rc == 0) {
1659                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1660                                                          netfid);
1661                                 CIFSSMBClose(xid, pTcon, netfid);
1662                         } else {
1663                         /* BB For even older servers we could convert time_buf
1664                            into old DOS style which uses two second
1665                            granularity */
1666
1667                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1668                                         &time_buf, cifs_sb->local_nls); */
1669                         }
1670                 }
1671                 /* Even if error on time set, no sense failing the call if
1672                 the server would set the time to a reasonable value anyway,
1673                 and this check ensures that we are not being called from
1674                 sys_utimes in which case we ought to fail the call back to
1675                 the user when the server rejects the call */
1676                 if ((rc) && (attrs->ia_valid &
1677                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1678                         rc = 0;
1679         }
1680
1681         /* do not need local check to inode_check_ok since the server does
1682            that */
1683         if (!rc)
1684                 rc = inode_setattr(inode, attrs);
1685 cifs_setattr_exit:
1686         kfree(full_path);
1687         FreeXid(xid);
1688         return rc;
1689 }
1690
1691 #if 0
1692 void cifs_delete_inode(struct inode *inode)
1693 {
1694         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1695         /* may have to add back in if and when safe distributed caching of
1696            directories added e.g. via FindNotify */
1697 }
1698 #endif