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   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2007
   5  *   Author(s): Steve French (sfrench@us.ibm.com)
   6  *
   7  *   This library is free software; you can redistribute it and/or modify
   8  *   it under the terms of the GNU Lesser General Public License as published
   9  *   by the Free Software Foundation; either version 2.1 of the License, or
  10  *   (at your option) any later version.
  11  *
  12  *   This library is distributed in the hope that it will be useful,
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
  15  *   the GNU Lesser General Public License for more details.
  16  *
  17  *   You should have received a copy of the GNU Lesser General Public License
  18  *   along with this library; if not, write to the Free Software
  19  *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  20  */
  21 #include <linux/fs.h>
  22 #include <linux/stat.h>
  23 #include <linux/pagemap.h>
  24 #include <asm/div64.h>
  25 #include "cifsfs.h"
  26 #include "cifspdu.h"
  27 #include "cifsglob.h"
  28 #include "cifsproto.h"
  29 #include "cifs_debug.h"
  30 #include "cifs_fs_sb.h"
  31
  32
  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 == -EREMOTE && !is_dfs_referral) {
 223                 is_dfs_referral = true;
 224                 cFYI(DBG2, ("DFS ref"));
 225                 /* for DFS, server does not give us real inode data */
 226                 fill_fake_finddataunix(&find_data, sb);
 227                 rc = 0;
 228         } else if (rc)
 229                 goto cgiiu_exit;
 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 = CIFSSMBSetPathInfo(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 = CIFSSMBSetFileInfo(xid, pTcon,
 771                                                                 pinfo_buf,
 772                                                                 netfid,
 773                                                                 current->tgid);
 774                                         CIFSSMBClose(xid, pTcon, netfid);
 775                                 }
 776                         }
 777                         kfree(pinfo_buf);
 778                 }
 779                 if (rc == 0) {
 780                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 781                                             cifs_sb->local_nls,
 782                                             cifs_sb->mnt_cifs_flags &
 783                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 784                         if (!rc) {
 785                                 if (direntry->d_inode)
 786                                         drop_nlink(direntry->d_inode);
 787                         } else if (rc == -ETXTBSY) {
 788                                 int oplock = 0;
 789                                 __u16 netfid;
 790
 791                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 792                                                  FILE_OPEN, DELETE,
 793                                                  CREATE_NOT_DIR |
 794                                                  CREATE_DELETE_ON_CLOSE,
 795                                                  &netfid, &oplock, NULL,
 796                                                  cifs_sb->local_nls,
 797                                                  cifs_sb->mnt_cifs_flags &
 798                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 799                                 if (rc == 0) {
 800                                         CIFSSMBRenameOpenFile(xid, pTcon,
 801                                                 netfid, NULL,
 802                                                 cifs_sb->local_nls,
 803                                                 cifs_sb->mnt_cifs_flags &
 804                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 805                                         CIFSSMBClose(xid, pTcon, netfid);
 806                                         if (direntry->d_inode)
 807                                                 drop_nlink(direntry->d_inode);
 808                                 }
 809                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 810                         }
 811                 }
 812         }
 813         if (direntry->d_inode) {
 814                 cifsInode = CIFS_I(direntry->d_inode);
 815                 cifsInode->time = 0;    /* will force revalidate to get info
 816                                            when needed */
 817                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 818         }
 819         if (inode) {
 820                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 821                 cifsInode = CIFS_I(inode);
 822                 cifsInode->time = 0;    /* force revalidate of dir as well */
 823         }
 824
 825         kfree(full_path);
 826         FreeXid(xid);
 827         return rc;
 828 }
 829
 830 static void posix_fill_in_inode(struct inode *tmp_inode,
 831         FILE_UNIX_BASIC_INFO *pData, int isNewInode)
 832 {
 833         struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
 834         loff_t local_size;
 835         struct timespec local_mtime;
 836
 837         cifsInfo->time = jiffies;
 838         atomic_inc(&cifsInfo->inUse);
 839
 840         /* save mtime and size */
 841         local_mtime = tmp_inode->i_mtime;
 842         local_size  = tmp_inode->i_size;
 843
 844         cifs_unix_info_to_inode(tmp_inode, pData, 1);
 845         cifs_set_ops(tmp_inode, false);
 846
 847         if (!S_ISREG(tmp_inode->i_mode))
 848                 return;
 849
 850         /*
 851          * No sense invalidating pages for new inode
 852          * since we we have not started caching
 853          * readahead file data yet.
 854          */
 855         if (isNewInode)
 856                 return;
 857
 858         if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
 859                 (local_size == tmp_inode->i_size)) {
 860                 cFYI(1, ("inode exists but unchanged"));
 861         } else {
 862                 /* file may have changed on server */
 863                 cFYI(1, ("invalidate inode, readdir detected change"));
 864                 invalidate_remote_inode(tmp_inode);
 865         }
 866 }
 867
 868 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 869 {
 870         int rc = 0;
 871         int xid;
 872         struct cifs_sb_info *cifs_sb;
 873         struct cifsTconInfo *pTcon;
 874         char *full_path = NULL;
 875         struct inode *newinode = NULL;
 876
 877         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 878
 879         xid = GetXid();
 880
 881         cifs_sb = CIFS_SB(inode->i_sb);
 882         pTcon = cifs_sb->tcon;
 883
 884         full_path = build_path_from_dentry(direntry);
 885         if (full_path == NULL) {
 886                 FreeXid(xid);
 887                 return -ENOMEM;
 888         }
 889
 890         if ((pTcon->ses->capabilities & CAP_UNIX) &&
 891                 (CIFS_UNIX_POSIX_PATH_OPS_CAP &
 892                         le64_to_cpu(pTcon->fsUnixInfo.Capability))) {
 893                 u32 oplock = 0;
 894                 FILE_UNIX_BASIC_INFO *pInfo =
 895                         kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 896                 if (pInfo == NULL) {
 897                         rc = -ENOMEM;
 898                         goto mkdir_out;
 899                 }
 900
 901                 mode &= ~current->fs->umask;
 902                 rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT,
 903                                 mode, NULL /* netfid */, pInfo, &oplock,
 904                                 full_path, cifs_sb->local_nls,
 905                                 cifs_sb->mnt_cifs_flags &
 906                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 907                 if (rc == -EOPNOTSUPP) {
 908                         kfree(pInfo);
 909                         goto mkdir_retry_old;
 910                 } else if (rc) {
 911                         cFYI(1, ("posix mkdir returned 0x%x", rc));
 912                         d_drop(direntry);
 913                 } else {
 914                         if (pInfo->Type == cpu_to_le32(-1)) {
 915                                 /* no return info, go query for it */
 916                                 kfree(pInfo);
 917                                 goto mkdir_get_info;
 918                         }
 919 /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need
 920         to set uid/gid */
 921                         inc_nlink(inode);
 922                         if (pTcon->nocase)
 923                                 direntry->d_op = &cifs_ci_dentry_ops;
 924                         else
 925                                 direntry->d_op = &cifs_dentry_ops;
 926
 927                         newinode = new_inode(inode->i_sb);
 928                         if (newinode == NULL) {
 929                                 kfree(pInfo);
 930                                 goto mkdir_get_info;
 931                         }
 932                         /* Is an i_ino of zero legal? */
 933                         /* Are there sanity checks we can use to ensure that
 934                            the server is really filling in that field? */
 935                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
 936                                 newinode->i_ino =
 937                                         (unsigned long)pInfo->UniqueId;
 938                         } /* note ino incremented to unique num in new_inode */
 939                         if (inode->i_sb->s_flags & MS_NOATIME)
 940                                 newinode->i_flags |= S_NOATIME | S_NOCMTIME;
 941                         newinode->i_nlink = 2;
 942
 943                         insert_inode_hash(newinode);
 944                         d_instantiate(direntry, newinode);
 945
 946                         /* we already checked in POSIXCreate whether
 947                            frame was long enough */
 948                         posix_fill_in_inode(direntry->d_inode,
 949                                         pInfo, 1 /* NewInode */);
 950 #ifdef CONFIG_CIFS_DEBUG2
 951                         cFYI(1, ("instantiated dentry %p %s to inode %p",
 952                                 direntry, direntry->d_name.name, newinode));
 953
 954                         if (newinode->i_nlink != 2)
 955                                 cFYI(1, ("unexpected number of links %d",
 956                                         newinode->i_nlink));
 957 #endif
 958                 }
 959                 kfree(pInfo);
 960                 goto mkdir_out;
 961         }
 962 mkdir_retry_old:
 963         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 964         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 965                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 966         if (rc) {
 967                 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
 968                 d_drop(direntry);
 969         } else {
 970 mkdir_get_info:
 971                 inc_nlink(inode);
 972                 if (pTcon->unix_ext)
 973                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 974                                                       inode->i_sb, xid);
 975                 else
 976                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 977                                                  inode->i_sb, xid, NULL);
 978
 979                 if (pTcon->nocase)
 980                         direntry->d_op = &cifs_ci_dentry_ops;
 981                 else
 982                         direntry->d_op = &cifs_dentry_ops;
 983                 d_instantiate(direntry, newinode);
 984                  /* setting nlink not necessary except in cases where we
 985                   * failed to get it from the server or was set bogus */
 986                 if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2))
 987                                 direntry->d_inode->i_nlink = 2;
 988
 989                 mode &= ~current->fs->umask;
 990                 /* must turn on setgid bit if parent dir has it */
 991                 if (inode->i_mode & S_ISGID)
 992                         mode |= S_ISGID;
 993
 994                 if (pTcon->unix_ext) {
 995                         struct cifs_unix_set_info_args args = {
 996                                 .mode   = mode,
 997                                 .ctime  = NO_CHANGE_64,
 998                                 .atime  = NO_CHANGE_64,
 999                                 .mtime  = NO_CHANGE_64,
1000                                 .device = 0,
1001                         };
1002                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
1003                                 args.uid = (__u64)current->fsuid;
1004                                 if (inode->i_mode & S_ISGID)
1005                                         args.gid = (__u64)inode->i_gid;
1006                                 else
1007                                         args.gid = (__u64)current->fsgid;
1008                         } else {
1009                                 args.uid = NO_CHANGE_64;
1010                                 args.gid = NO_CHANGE_64;
1011                         }
1012                         CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args,
1013                                             cifs_sb->local_nls,
1014                                             cifs_sb->mnt_cifs_flags &
1015                                             CIFS_MOUNT_MAP_SPECIAL_CHR);
1016                 } else {
1017                         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) &&
1018                             (mode & S_IWUGO) == 0) {
1019                                 FILE_BASIC_INFO pInfo;
1020                                 memset(&pInfo, 0, sizeof(pInfo));
1021                                 pInfo.Attributes = cpu_to_le32(ATTR_READONLY);
1022                                 CIFSSMBSetPathInfo(xid, pTcon, full_path,
1023                                                 &pInfo, cifs_sb->local_nls,
1024                                                 cifs_sb->mnt_cifs_flags &
1025                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1026                         }
1027                         if (direntry->d_inode) {
1028                                 if (cifs_sb->mnt_cifs_flags &
1029                                      CIFS_MOUNT_DYNPERM)
1030                                         direntry->d_inode->i_mode =
1031                                                 (mode | S_IFDIR);
1032
1033                                 if (cifs_sb->mnt_cifs_flags &
1034                                      CIFS_MOUNT_SET_UID) {
1035                                         direntry->d_inode->i_uid =
1036                                                 current->fsuid;
1037                                         if (inode->i_mode & S_ISGID)
1038                                                 direntry->d_inode->i_gid =
1039                                                         inode->i_gid;
1040                                         else
1041                                                 direntry->d_inode->i_gid =
1042                                                         current->fsgid;
1043                                 }
1044                         }
1045                 }
1046         }
1047 mkdir_out:
1048         kfree(full_path);
1049         FreeXid(xid);
1050         return rc;
1051 }
1052
1053 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
1054 {
1055         int rc = 0;
1056         int xid;
1057         struct cifs_sb_info *cifs_sb;
1058         struct cifsTconInfo *pTcon;
1059         char *full_path = NULL;
1060         struct cifsInodeInfo *cifsInode;
1061
1062         cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
1063
1064         xid = GetXid();
1065
1066         cifs_sb = CIFS_SB(inode->i_sb);
1067         pTcon = cifs_sb->tcon;
1068
1069         full_path = build_path_from_dentry(direntry);
1070         if (full_path == NULL) {
1071                 FreeXid(xid);
1072                 return -ENOMEM;
1073         }
1074
1075         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
1076                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
1077
1078         if (!rc) {
1079                 drop_nlink(inode);
1080                 spin_lock(&direntry->d_inode->i_lock);
1081                 i_size_write(direntry->d_inode, 0);
1082                 clear_nlink(direntry->d_inode);
1083                 spin_unlock(&direntry->d_inode->i_lock);
1084         }
1085
1086         cifsInode = CIFS_I(direntry->d_inode);
1087         cifsInode->time = 0;    /* force revalidate to go get info when
1088                                    needed */
1089         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
1090                 current_fs_time(inode->i_sb);
1091
1092         kfree(full_path);
1093         FreeXid(xid);
1094         return rc;
1095 }
1096
1097 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
1098         struct inode *target_inode, struct dentry *target_direntry)
1099 {
1100         char *fromName;
1101         char *toName;
1102         struct cifs_sb_info *cifs_sb_source;
1103         struct cifs_sb_info *cifs_sb_target;
1104         struct cifsTconInfo *pTcon;
1105         int xid;
1106         int rc = 0;
1107
1108         xid = GetXid();
1109
1110         cifs_sb_target = CIFS_SB(target_inode->i_sb);
1111         cifs_sb_source = CIFS_SB(source_inode->i_sb);
1112         pTcon = cifs_sb_source->tcon;
1113
1114         if (pTcon != cifs_sb_target->tcon) {
1115                 FreeXid(xid);
1116                 return -EXDEV;  /* BB actually could be allowed if same server,
1117                                    but different share.
1118                                    Might eventually add support for this */
1119         }
1120
1121         /* we already  have the rename sem so we do not need to grab it again
1122            here to protect the path integrity */
1123         fromName = build_path_from_dentry(source_direntry);
1124         toName = build_path_from_dentry(target_direntry);
1125         if ((fromName == NULL) || (toName == NULL)) {
1126                 rc = -ENOMEM;
1127                 goto cifs_rename_exit;
1128         }
1129
1130         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
1131                            cifs_sb_source->local_nls,
1132                            cifs_sb_source->mnt_cifs_flags &
1133                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1134         if (rc == -EEXIST) {
1135                 /* check if they are the same file because rename of hardlinked
1136                    files is a noop */
1137                 FILE_UNIX_BASIC_INFO *info_buf_source;
1138                 FILE_UNIX_BASIC_INFO *info_buf_target;
1139
1140                 info_buf_source =
1141                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
1142                 if (info_buf_source != NULL) {
1143                         info_buf_target = info_buf_source + 1;
1144                         if (pTcon->unix_ext)
1145                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
1146                                         info_buf_source,
1147                                         cifs_sb_source->local_nls,
1148                                         cifs_sb_source->mnt_cifs_flags &
1149                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1150                         /* else rc is still EEXIST so will fall through to
1151                            unlink the target and retry rename */
1152                         if (rc == 0) {
1153                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
1154                                                 info_buf_target,
1155                                                 cifs_sb_target->local_nls,
1156                                                 /* remap based on source sb */
1157                                                 cifs_sb_source->mnt_cifs_flags &
1158                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
1159                         }
1160                         if ((rc == 0) &&
1161                             (info_buf_source->UniqueId ==
1162                              info_buf_target->UniqueId)) {
1163                         /* do not rename since the files are hardlinked which
1164                            is a noop */
1165                         } else {
1166                         /* we either can not tell the files are hardlinked
1167                            (as with Windows servers) or files are not
1168                            hardlinked so delete the target manually before
1169                            renaming to follow POSIX rather than Windows
1170                            semantics */
1171                                 cifs_unlink(target_inode, target_direntry);
1172                                 rc = CIFSSMBRename(xid, pTcon, fromName,
1173                                                    toName,
1174                                                    cifs_sb_source->local_nls,
1175                                                    cifs_sb_source->mnt_cifs_flags
1176                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
1177                         }
1178                         kfree(info_buf_source);
1179                 } /* if we can not get memory just leave rc as EEXIST */
1180         }
1181
1182         if (rc)
1183                 cFYI(1, ("rename rc %d", rc));
1184
1185         if ((rc == -EIO) || (rc == -EEXIST)) {
1186                 int oplock = 0;
1187                 __u16 netfid;
1188
1189                 /* BB FIXME Is Generic Read correct for rename? */
1190                 /* if renaming directory - we should not say CREATE_NOT_DIR,
1191                    need to test renaming open directory, also GENERIC_READ
1192                    might not right be right access to request */
1193                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
1194                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
1195                                  cifs_sb_source->local_nls,
1196                                  cifs_sb_source->mnt_cifs_flags &
1197                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1198                 if (rc == 0) {
1199                         rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
1200                                               cifs_sb_source->local_nls,
1201                                               cifs_sb_source->mnt_cifs_flags &
1202                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1203                         CIFSSMBClose(xid, pTcon, netfid);
1204                 }
1205         }
1206
1207 cifs_rename_exit:
1208         kfree(fromName);
1209         kfree(toName);
1210         FreeXid(xid);
1211         return rc;
1212 }
1213
1214 int cifs_revalidate(struct dentry *direntry)
1215 {
1216         int xid;
1217         int rc = 0, wbrc = 0;
1218         char *full_path;
1219         struct cifs_sb_info *cifs_sb;
1220         struct cifsInodeInfo *cifsInode;
1221         loff_t local_size;
1222         struct timespec local_mtime;
1223         bool invalidate_inode = false;
1224
1225         if (direntry->d_inode == NULL)
1226                 return -ENOENT;
1227
1228         cifsInode = CIFS_I(direntry->d_inode);
1229
1230         if (cifsInode == NULL)
1231                 return -ENOENT;
1232
1233         /* no sense revalidating inode info on file that no one can write */
1234         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
1235                 return rc;
1236
1237         xid = GetXid();
1238
1239         cifs_sb = CIFS_SB(direntry->d_sb);
1240
1241         /* can not safely grab the rename sem here if rename calls revalidate
1242            since that would deadlock */
1243         full_path = build_path_from_dentry(direntry);
1244         if (full_path == NULL) {
1245                 FreeXid(xid);
1246                 return -ENOMEM;
1247         }
1248         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
1249                  "jiffies %ld", full_path, direntry->d_inode,
1250                  direntry->d_inode->i_count.counter, direntry,
1251                  direntry->d_time, jiffies));
1252
1253         if (cifsInode->time == 0) {
1254                 /* was set to zero previously to force revalidate */
1255         } else if (time_before(jiffies, cifsInode->time + HZ) &&
1256                    lookupCacheEnabled) {
1257                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1258                     (direntry->d_inode->i_nlink == 1)) {
1259                         kfree(full_path);
1260                         FreeXid(xid);
1261                         return rc;
1262                 } else {
1263                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1264                 }
1265         }
1266
1267         /* save mtime and size */
1268         local_mtime = direntry->d_inode->i_mtime;
1269         local_size = direntry->d_inode->i_size;
1270
1271         if (cifs_sb->tcon->unix_ext) {
1272                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1273                                               direntry->d_sb, xid);
1274                 if (rc) {
1275                         cFYI(1, ("error on getting revalidate info %d", rc));
1276 /*                      if (rc != -ENOENT)
1277                                 rc = 0; */      /* BB should we cache info on
1278                                                    certain errors? */
1279                 }
1280         } else {
1281                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1282                                          direntry->d_sb, xid, NULL);
1283                 if (rc) {
1284                         cFYI(1, ("error on getting revalidate info %d", rc));
1285 /*                      if (rc != -ENOENT)
1286                                 rc = 0; */      /* BB should we cache info on
1287                                                    certain errors? */
1288                 }
1289         }
1290         /* should we remap certain errors, access denied?, to zero */
1291
1292         /* if not oplocked, we invalidate inode pages if mtime or file size
1293            had changed on server */
1294
1295         if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) &&
1296             (local_size == direntry->d_inode->i_size)) {
1297                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1298         } else {
1299                 /* file may have changed on server */
1300                 if (cifsInode->clientCanCacheRead) {
1301                         /* no need to invalidate inode pages since we were the
1302                            only ones who could have modified the file and the
1303                            server copy is staler than ours */
1304                 } else {
1305                         invalidate_inode = true;
1306                 }
1307         }
1308
1309         /* can not grab this sem since kernel filesys locking documentation
1310            indicates i_mutex may be taken by the kernel on lookup and rename
1311            which could deadlock if we grab the i_mutex here as well */
1312 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1313         /* need to write out dirty pages here  */
1314         if (direntry->d_inode->i_mapping) {
1315                 /* do we need to lock inode until after invalidate completes
1316                    below? */
1317                 wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping);
1318                 if (wbrc)
1319                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1320         }
1321         if (invalidate_inode) {
1322         /* shrink_dcache not necessary now that cifs dentry ops
1323         are exported for negative dentries */
1324 /*              if (S_ISDIR(direntry->d_inode->i_mode))
1325                         shrink_dcache_parent(direntry); */
1326                 if (S_ISREG(direntry->d_inode->i_mode)) {
1327                         if (direntry->d_inode->i_mapping) {
1328                                 wbrc = filemap_fdatawait(direntry->d_inode->i_mapping);
1329                                 if (wbrc)
1330                                         CIFS_I(direntry->d_inode)->write_behind_rc = wbrc;
1331                         }
1332                         /* may eventually have to do this for open files too */
1333                         if (list_empty(&(cifsInode->openFileList))) {
1334                                 /* changed on server - flush read ahead pages */
1335                                 cFYI(1, ("Invalidating read ahead data on "
1336                                          "closed file"));
1337                                 invalidate_remote_inode(direntry->d_inode);
1338                         }
1339                 }
1340         }
1341 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1342
1343         kfree(full_path);
1344         FreeXid(xid);
1345         return rc;
1346 }
1347
1348 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1349         struct kstat *stat)
1350 {
1351         int err = cifs_revalidate(dentry);
1352         if (!err) {
1353                 generic_fillattr(dentry->d_inode, stat);
1354                 stat->blksize = CIFS_MAX_MSGSIZE;
1355         }
1356         return err;
1357 }
1358
1359 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1360 {
1361         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1362         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1363         struct page *page;
1364         int rc = 0;
1365
1366         page = grab_cache_page(mapping, index);
1367         if (!page)
1368                 return -ENOMEM;
1369
1370         zero_user_segment(page, offset, PAGE_CACHE_SIZE);
1371         unlock_page(page);
1372         page_cache_release(page);
1373         return rc;
1374 }
1375
1376 static int cifs_vmtruncate(struct inode *inode, loff_t offset)
1377 {
1378         struct address_space *mapping = inode->i_mapping;
1379         unsigned long limit;
1380
1381         spin_lock(&inode->i_lock);
1382         if (inode->i_size < offset)
1383                 goto do_expand;
1384         /*
1385          * truncation of in-use swapfiles is disallowed - it would cause
1386          * subsequent swapout to scribble on the now-freed blocks.
1387          */
1388         if (IS_SWAPFILE(inode)) {
1389                 spin_unlock(&inode->i_lock);
1390                 goto out_busy;
1391         }
1392         i_size_write(inode, offset);
1393         spin_unlock(&inode->i_lock);
1394         /*
1395          * unmap_mapping_range is called twice, first simply for efficiency
1396          * so that truncate_inode_pages does fewer single-page unmaps. However
1397          * after this first call, and before truncate_inode_pages finishes,
1398          * it is possible for private pages to be COWed, which remain after
1399          * truncate_inode_pages finishes, hence the second unmap_mapping_range
1400          * call must be made for correctness.
1401          */
1402         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1403         truncate_inode_pages(mapping, offset);
1404         unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1);
1405         goto out_truncate;
1406
1407 do_expand:
1408         limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
1409         if (limit != RLIM_INFINITY && offset > limit) {
1410                 spin_unlock(&inode->i_lock);
1411                 goto out_sig;
1412         }
1413         if (offset > inode->i_sb->s_maxbytes) {
1414                 spin_unlock(&inode->i_lock);
1415                 goto out_big;
1416         }
1417         i_size_write(inode, offset);
1418         spin_unlock(&inode->i_lock);
1419 out_truncate:
1420         if (inode->i_op && inode->i_op->truncate)
1421                 inode->i_op->truncate(inode);
1422         return 0;
1423 out_sig:
1424         send_sig(SIGXFSZ, current, 0);
1425 out_big:
1426         return -EFBIG;
1427 out_busy:
1428         return -ETXTBSY;
1429 }
1430
1431 static int
1432 cifs_set_file_size(struct inode *inode, struct iattr *attrs,
1433                    int xid, char *full_path)
1434 {
1435         int rc;
1436         struct cifsFileInfo *open_file;
1437         struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1438         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1439         struct cifsTconInfo *pTcon = cifs_sb->tcon;
1440
1441         /*
1442          * To avoid spurious oplock breaks from server, in the case of
1443          * inodes that we already have open, avoid doing path based
1444          * setting of file size if we can do it by handle.
1445          * This keeps our caching token (oplock) and avoids timeouts
1446          * when the local oplock break takes longer to flush
1447          * writebehind data than the SMB timeout for the SetPathInfo
1448          * request would allow
1449          */
1450         open_file = find_writable_file(cifsInode);
1451         if (open_file) {
1452                 __u16 nfid = open_file->netfid;
1453                 __u32 npid = open_file->pid;
1454                 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid,
1455                                         npid, false);
1456                 atomic_dec(&open_file->wrtPending);
1457                 cFYI(1, ("SetFSize for attrs rc = %d", rc));
1458                 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1459                         unsigned int bytes_written;
1460                         rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size,
1461                                           &bytes_written, NULL, NULL, 1);
1462                         cFYI(1, ("Wrt seteof rc %d", rc));
1463                 }
1464         } else
1465                 rc = -EINVAL;
1466
1467         if (rc != 0) {
1468                 /* Set file size by pathname rather than by handle
1469                    either because no valid, writeable file handle for
1470                    it was found or because there was an error setting
1471                    it by handle */
1472                 rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size,
1473                                    false, cifs_sb->local_nls,
1474                                    cifs_sb->mnt_cifs_flags &
1475                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1476                 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1477                 if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1478                         __u16 netfid;
1479                         int oplock = 0;
1480
1481                         rc = SMBLegacyOpen(xid, pTcon, full_path,
1482                                 FILE_OPEN, GENERIC_WRITE,
1483                                 CREATE_NOT_DIR, &netfid, &oplock, NULL,
1484                                 cifs_sb->local_nls,
1485                                 cifs_sb->mnt_cifs_flags &
1486                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1487                         if (rc == 0) {
1488                                 unsigned int bytes_written;
1489                                 rc = CIFSSMBWrite(xid, pTcon, netfid, 0,
1490                                                   attrs->ia_size,
1491                                                   &bytes_written, NULL,
1492                                                   NULL, 1);
1493                                 cFYI(1, ("wrt seteof rc %d", rc));
1494                                 CIFSSMBClose(xid, pTcon, netfid);
1495                         }
1496                 }
1497         }
1498
1499         if (rc == 0) {
1500                 rc = cifs_vmtruncate(inode, attrs->ia_size);
1501                 cifs_truncate_page(inode->i_mapping, inode->i_size);
1502         }
1503
1504         return rc;
1505 }
1506
1507 static int
1508 cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid,
1509                     char *full_path, __u32 dosattr)
1510 {
1511         int rc;
1512         int oplock = 0;
1513         __u16 netfid;
1514         __u32 netpid;
1515         bool set_time = false;
1516         struct cifsFileInfo *open_file;
1517         struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1518         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1519         struct cifsTconInfo *pTcon = cifs_sb->tcon;
1520         FILE_BASIC_INFO info_buf;
1521
1522         if (attrs->ia_valid & ATTR_ATIME) {
1523                 set_time = true;
1524                 info_buf.LastAccessTime =
1525                         cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1526         } else
1527                 info_buf.LastAccessTime = 0;
1528
1529         if (attrs->ia_valid & ATTR_MTIME) {
1530                 set_time = true;
1531                 info_buf.LastWriteTime =
1532                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1533         } else
1534                 info_buf.LastWriteTime = 0;
1535
1536         /*
1537          * Samba throws this field away, but windows may actually use it.
1538          * Do not set ctime unless other time stamps are changed explicitly
1539          * (i.e. by utimes()) since we would then have a mix of client and
1540          * server times.
1541          */
1542         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1543                 cFYI(1, ("CIFS - CTIME changed"));
1544                 info_buf.ChangeTime =
1545                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1546         } else
1547                 info_buf.ChangeTime = 0;
1548
1549         info_buf.CreationTime = 0;      /* don't change */
1550         info_buf.Attributes = cpu_to_le32(dosattr);
1551
1552         /*
1553          * If the file is already open for write, just use that fileid
1554          */
1555         open_file = find_writable_file(cifsInode);
1556         if (open_file) {
1557                 netfid = open_file->netfid;
1558                 netpid = open_file->pid;
1559                 goto set_via_filehandle;
1560         }
1561
1562         /*
1563          * NT4 apparently returns success on this call, but it doesn't
1564          * really work.
1565          */
1566         if (!(pTcon->ses->flags & CIFS_SES_NT4)) {
1567                 rc = CIFSSMBSetPathInfo(xid, pTcon, full_path,
1568                                      &info_buf, cifs_sb->local_nls,
1569                                      cifs_sb->mnt_cifs_flags &
1570                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
1571                 if (rc != -EOPNOTSUPP && rc != -EINVAL)
1572                         goto out;
1573         }
1574
1575         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1576                  "times not supported by this server"));
1577         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1578                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1579                          CREATE_NOT_DIR, &netfid, &oplock,
1580                          NULL, cifs_sb->local_nls,
1581                          cifs_sb->mnt_cifs_flags &
1582                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1583
1584         if (rc != 0) {
1585                 if (rc == -EIO)
1586                         rc = -EINVAL;
1587                 goto out;
1588         }
1589
1590         netpid = current->tgid;
1591
1592 set_via_filehandle:
1593         rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid);
1594         if (open_file == NULL)
1595                 CIFSSMBClose(xid, pTcon, netfid);
1596         else
1597                 atomic_dec(&open_file->wrtPending);
1598 out:
1599         return rc;
1600 }
1601
1602 static int
1603 cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs)
1604 {
1605         int rc;
1606         int xid;
1607         char *full_path = NULL;
1608         struct inode *inode = direntry->d_inode;
1609         struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1610         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1611         struct cifsTconInfo *pTcon = cifs_sb->tcon;
1612         struct cifs_unix_set_info_args *args = NULL;
1613
1614         cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x",
1615                  direntry->d_name.name, attrs->ia_valid));
1616
1617         xid = GetXid();
1618
1619         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1620                 /* check if we have permission to change attrs */
1621                 rc = inode_change_ok(inode, attrs);
1622                 if (rc < 0)
1623                         goto out;
1624                 else
1625                         rc = 0;
1626         }
1627
1628         full_path = build_path_from_dentry(direntry);
1629         if (full_path == NULL) {
1630                 rc = -ENOMEM;
1631                 goto out;
1632         }
1633
1634         if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1635                 /*
1636                    Flush data before changing file size or changing the last
1637                    write time of the file on the server. If the
1638                    flush returns error, store it to report later and continue.
1639                    BB: This should be smarter. Why bother flushing pages that
1640                    will be truncated anyway? Also, should we error out here if
1641                    the flush returns error?
1642                  */
1643                 rc = filemap_write_and_wait(inode->i_mapping);
1644                 if (rc != 0) {
1645                         cifsInode->write_behind_rc = rc;
1646                         rc = 0;
1647                 }
1648         }
1649
1650         if (attrs->ia_valid & ATTR_SIZE) {
1651                 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1652                 if (rc != 0)
1653                         goto out;
1654         }
1655
1656         /* skip mode change if it's just for clearing setuid/setgid */
1657         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1658                 attrs->ia_valid &= ~ATTR_MODE;
1659
1660         args = kmalloc(sizeof(*args), GFP_KERNEL);
1661         if (args == NULL) {
1662                 rc = -ENOMEM;
1663                 goto out;
1664         }
1665
1666         /* set up the struct */
1667         if (attrs->ia_valid & ATTR_MODE)
1668                 args->mode = attrs->ia_mode;
1669         else
1670                 args->mode = NO_CHANGE_64;
1671
1672         if (attrs->ia_valid & ATTR_UID)
1673                 args->uid = attrs->ia_uid;
1674         else
1675                 args->uid = NO_CHANGE_64;
1676
1677         if (attrs->ia_valid & ATTR_GID)
1678                 args->gid = attrs->ia_gid;
1679         else
1680                 args->gid = NO_CHANGE_64;
1681
1682         if (attrs->ia_valid & ATTR_ATIME)
1683                 args->atime = cifs_UnixTimeToNT(attrs->ia_atime);
1684         else
1685                 args->atime = NO_CHANGE_64;
1686
1687         if (attrs->ia_valid & ATTR_MTIME)
1688                 args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime);
1689         else
1690                 args->mtime = NO_CHANGE_64;
1691
1692         if (attrs->ia_valid & ATTR_CTIME)
1693                 args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime);
1694         else
1695                 args->ctime = NO_CHANGE_64;
1696
1697         args->device = 0;
1698         rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args,
1699                                 cifs_sb->local_nls,
1700                                 cifs_sb->mnt_cifs_flags &
1701                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1702
1703         if (!rc)
1704                 rc = inode_setattr(inode, attrs);
1705 out:
1706         kfree(args);
1707         kfree(full_path);
1708         FreeXid(xid);
1709         return rc;
1710 }
1711
1712 static int
1713 cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs)
1714 {
1715         int xid;
1716         struct inode *inode = direntry->d_inode;
1717         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1718         struct cifsInodeInfo *cifsInode = CIFS_I(inode);
1719         char *full_path = NULL;
1720         int rc = -EACCES;
1721         __u32 dosattr = 0;
1722         __u64 mode = NO_CHANGE_64;
1723
1724         xid = GetXid();
1725
1726         cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1727                  direntry->d_name.name, attrs->ia_valid));
1728
1729         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1730                 /* check if we have permission to change attrs */
1731                 rc = inode_change_ok(inode, attrs);
1732                 if (rc < 0) {
1733                         FreeXid(xid);
1734                         return rc;
1735                 } else
1736                         rc = 0;
1737         }
1738
1739         full_path = build_path_from_dentry(direntry);
1740         if (full_path == NULL) {
1741                 FreeXid(xid);
1742                 return -ENOMEM;
1743         }
1744
1745         if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) {
1746                 /*
1747                    Flush data before changing file size or changing the last
1748                    write time of the file on the server. If the
1749                    flush returns error, store it to report later and continue.
1750                    BB: This should be smarter. Why bother flushing pages that
1751                    will be truncated anyway? Also, should we error out here if
1752                    the flush returns error?
1753                  */
1754                 rc = filemap_write_and_wait(inode->i_mapping);
1755                 if (rc != 0) {
1756                         cifsInode->write_behind_rc = rc;
1757                         rc = 0;
1758                 }
1759         }
1760
1761         if (attrs->ia_valid & ATTR_SIZE) {
1762                 rc = cifs_set_file_size(inode, attrs, xid, full_path);
1763                 if (rc != 0)
1764                         goto cifs_setattr_exit;
1765         }
1766
1767         /*
1768          * Without unix extensions we can't send ownership changes to the
1769          * server, so silently ignore them. This is consistent with how
1770          * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With
1771          * CIFSACL support + proper Windows to Unix idmapping, we may be
1772          * able to support this in the future.
1773          */
1774         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID))
1775                 attrs->ia_valid &= ~(ATTR_UID | ATTR_GID);
1776
1777         /* skip mode change if it's just for clearing setuid/setgid */
1778         if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID))
1779                 attrs->ia_valid &= ~ATTR_MODE;
1780
1781         if (attrs->ia_valid & ATTR_MODE) {
1782                 cFYI(1, ("Mode changed to 0%o", attrs->ia_mode));
1783                 mode = attrs->ia_mode;
1784         }
1785
1786         if (attrs->ia_valid & ATTR_MODE) {
1787                 rc = 0;
1788 #ifdef CONFIG_CIFS_EXPERIMENTAL
1789                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
1790                         rc = mode_to_acl(inode, full_path, mode);
1791                 else
1792 #endif
1793                 if (((mode & S_IWUGO) == 0) &&
1794                     (cifsInode->cifsAttrs & ATTR_READONLY) == 0) {
1795
1796                         dosattr = cifsInode->cifsAttrs | ATTR_READONLY;
1797
1798                         /* fix up mode if we're not using dynperm */
1799                         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
1800                                 attrs->ia_mode = inode->i_mode & ~S_IWUGO;
1801                 } else if ((mode & S_IWUGO) &&
1802                            (cifsInode->cifsAttrs & ATTR_READONLY)) {
1803
1804                         dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY;
1805                         /* Attributes of 0 are ignored */
1806                         if (dosattr == 0)
1807                                 dosattr |= ATTR_NORMAL;
1808
1809                         /* reset local inode permissions to normal */
1810                         if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1811                                 attrs->ia_mode &= ~(S_IALLUGO);
1812                                 if (S_ISDIR(inode->i_mode))
1813                                         attrs->ia_mode |=
1814                                                 cifs_sb->mnt_dir_mode;
1815                                 else
1816                                         attrs->ia_mode |=
1817                                                 cifs_sb->mnt_file_mode;
1818                         }
1819                 } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) {
1820                         /* ignore mode change - ATTR_READONLY hasn't changed */
1821                         attrs->ia_valid &= ~ATTR_MODE;
1822                 }
1823         }
1824
1825         if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) ||
1826             ((attrs->ia_valid & ATTR_MODE) && dosattr)) {
1827                 rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr);
1828                 /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */
1829
1830                 /* Even if error on time set, no sense failing the call if
1831                 the server would set the time to a reasonable value anyway,
1832                 and this check ensures that we are not being called from
1833                 sys_utimes in which case we ought to fail the call back to
1834                 the user when the server rejects the call */
1835                 if ((rc) && (attrs->ia_valid &
1836                                 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1837                         rc = 0;
1838         }
1839
1840         /* do not need local check to inode_check_ok since the server does
1841            that */
1842         if (!rc)
1843                 rc = inode_setattr(inode, attrs);
1844 cifs_setattr_exit:
1845         kfree(full_path);
1846         FreeXid(xid);
1847         return rc;
1848 }
1849
1850 int
1851 cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1852 {
1853         struct inode *inode = direntry->d_inode;
1854         struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
1855         struct cifsTconInfo *pTcon = cifs_sb->tcon;
1856
1857         if (pTcon->unix_ext)
1858                 return cifs_setattr_unix(direntry, attrs);
1859
1860         return cifs_setattr_nounix(direntry, attrs);
1861
1862         /* BB: add cifs_setattr_legacy for really old servers */
1863 }
1864
1865 #if 0
1866 void cifs_delete_inode(struct inode *inode)
1867 {
1868         cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1869         /* may have to add back in if and when safe distributed caching of
1870            directories added e.g. via FindNotify */
1871 }
1872 #endif