fs/cifs/inode.c

   1 /*
   2  *   fs/cifs/inode.c
   3  *
   4  *   Copyright (C) International Business Machines  Corp., 2002,2005
   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/buffer_head.h>
  23 #include <linux/stat.h>
  24 #include <linux/pagemap.h>
  25 #include <asm/div64.h>
  26 #include "cifsfs.h"
  27 #include "cifspdu.h"
  28 #include "cifsglob.h"
  29 #include "cifsproto.h"
  30 #include "cifs_debug.h"
  31 #include "cifs_fs_sb.h"
  32
  33 int cifs_get_inode_info_unix(struct inode **pinode,
  34         const unsigned char *search_path, struct super_block *sb, int xid)
  35 {
  36         int rc = 0;
  37         FILE_UNIX_BASIC_INFO findData;
  38         struct cifsTconInfo *pTcon;
  39         struct inode *inode;
  40         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
  41         char *tmp_path;
  42
  43         pTcon = cifs_sb->tcon;
  44         cFYI(1, ("Getting info on %s ", search_path));
  45         /* could have done a find first instead but this returns more info */
  46         rc = CIFSSMBUnixQPathInfo(xid, pTcon, search_path, &findData,
  47                                   cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
  48                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
  49 /*      dump_mem("\nUnixQPathInfo return data", &findData,
  50                  sizeof(findData)); */
  51         if (rc) {
  52                 if (rc == -EREMOTE) {
  53                         tmp_path =
  54                             kmalloc(strnlen(pTcon->treeName,
  55                                             MAX_TREE_SIZE + 1) +
  56                                     strnlen(search_path, MAX_PATHCONF) + 1,
  57                                     GFP_KERNEL);
  58                         if (tmp_path == NULL) {
  59                                 return -ENOMEM;
  60                         }
  61                         /* have to skip first of the double backslash of
  62                            UNC name */
  63                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
  64                         strncat(tmp_path, search_path, MAX_PATHCONF);
  65                         rc = connect_to_dfs_path(xid, pTcon->ses,
  66                                                  /* treename + */ tmp_path,
  67                                                  cifs_sb->local_nls,
  68                                                  cifs_sb->mnt_cifs_flags &
  69                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
  70                         kfree(tmp_path);
  71
  72                         /* BB fix up inode etc. */
  73                 } else if (rc) {
  74                         return rc;
  75                 }
  76         } else {
  77                 struct cifsInodeInfo *cifsInfo;
  78                 __u32 type = le32_to_cpu(findData.Type);
  79                 __u64 num_of_bytes = le64_to_cpu(findData.NumOfBytes);
  80                 __u64 end_of_file = le64_to_cpu(findData.EndOfFile);
  81
  82                 /* get new inode */
  83                 if (*pinode == NULL) {
  84                         *pinode = new_inode(sb);
  85                         if (*pinode == NULL)
  86                                 return -ENOMEM;
  87                         /* Is an i_ino of zero legal? */
  88                         /* Are there sanity checks we can use to ensure that
  89                            the server is really filling in that field? */
  90                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
  91                                 (*pinode)->i_ino =
  92                                         (unsigned long)findData.UniqueId;
  93                         } /* note ino incremented to unique num in new_inode */
  94                         insert_inode_hash(*pinode);
  95                 }
  96
  97                 inode = *pinode;
  98                 cifsInfo = CIFS_I(inode);
  99
 100                 cFYI(1, ("Old time %ld ", cifsInfo->time));
 101                 cifsInfo->time = jiffies;
 102                 cFYI(1, ("New time %ld ", cifsInfo->time));
 103                 /* this is ok to set on every inode revalidate */
 104                 atomic_set(&cifsInfo->inUse,1);
 105
 106                 inode->i_atime =
 107                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
 108                 inode->i_mtime =
 109                     cifs_NTtimeToUnix(le64_to_cpu
 110                                 (findData.LastModificationTime));
 111                 inode->i_ctime =
 112                     cifs_NTtimeToUnix(le64_to_cpu(findData.LastStatusChange));
 113                 inode->i_mode = le64_to_cpu(findData.Permissions);
 114                 /* since we set the inode type below we need to mask off
 115                    to avoid strange results if bits set above */
 116                         inode->i_mode &= ~S_IFMT;
 117                 if (type == UNIX_FILE) {
 118                         inode->i_mode |= S_IFREG;
 119                 } else if (type == UNIX_SYMLINK) {
 120                         inode->i_mode |= S_IFLNK;
 121                 } else if (type == UNIX_DIR) {
 122                         inode->i_mode |= S_IFDIR;
 123                 } else if (type == UNIX_CHARDEV) {
 124                         inode->i_mode |= S_IFCHR;
 125                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 126                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 127                 } else if (type == UNIX_BLOCKDEV) {
 128                         inode->i_mode |= S_IFBLK;
 129                         inode->i_rdev = MKDEV(le64_to_cpu(findData.DevMajor),
 130                                 le64_to_cpu(findData.DevMinor) & MINORMASK);
 131                 } else if (type == UNIX_FIFO) {
 132                         inode->i_mode |= S_IFIFO;
 133                 } else if (type == UNIX_SOCKET) {
 134                         inode->i_mode |= S_IFSOCK;
 135                 } else {
 136                         /* safest to call it a file if we do not know */
 137                         inode->i_mode |= S_IFREG;
 138                         cFYI(1,("unknown type %d",type));
 139                 }
 140                 inode->i_uid = le64_to_cpu(findData.Uid);
 141                 inode->i_gid = le64_to_cpu(findData.Gid);
 142                 inode->i_nlink = le64_to_cpu(findData.Nlinks);
 143
 144                 if (is_size_safe_to_change(cifsInfo)) {
 145                 /* can not safely change the file size here if the
 146                    client is writing to it due to potential races */
 147
 148                         i_size_write(inode, end_of_file);
 149
 150                 /* blksize needs to be multiple of two. So safer to default to
 151                 blksize and blkbits set in superblock so 2**blkbits and blksize
 152                 will match rather than setting to:
 153                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 154
 155                 /* This seems incredibly stupid but it turns out that i_blocks
 156                    is not related to (i_size / i_blksize), instead 512 byte size
 157                    is required for calculating num blocks */
 158
 159                 /* 512 bytes (2**9) is the fake blocksize that must be used */
 160                 /* for this calculation */
 161                         inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
 162                 }
 163
 164                 if (num_of_bytes < end_of_file)
 165                         cFYI(1, ("allocation size less than end of file"));
 166                 cFYI(1, ("Size %ld and blocks %llu",
 167                         (unsigned long) inode->i_size,
 168                         (unsigned long long)inode->i_blocks));
 169                 if (S_ISREG(inode->i_mode)) {
 170                         cFYI(1, ("File inode"));
 171                         inode->i_op = &cifs_file_inode_ops;
 172                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 173                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 174                                         inode->i_fop =
 175                                                 &cifs_file_direct_nobrl_ops;
 176                                 else
 177                                         inode->i_fop = &cifs_file_direct_ops;
 178                         } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 179                                 inode->i_fop = &cifs_file_nobrl_ops;
 180                         else /* not direct, send byte range locks */
 181                                 inode->i_fop = &cifs_file_ops;
 182
 183                         inode->i_data.a_ops = &cifs_addr_ops;
 184                         /* check if server can support readpages */
 185                         if(pTcon->ses->server->maxBuf <
 186                             4096 + MAX_CIFS_HDR_SIZE)
 187                                 inode->i_data.a_ops->readpages = NULL;
 188                 } else if (S_ISDIR(inode->i_mode)) {
 189                         cFYI(1, ("Directory inode"));
 190                         inode->i_op = &cifs_dir_inode_ops;
 191                         inode->i_fop = &cifs_dir_ops;
 192                 } else if (S_ISLNK(inode->i_mode)) {
 193                         cFYI(1, ("Symbolic Link inode"));
 194                         inode->i_op = &cifs_symlink_inode_ops;
 195                 /* tmp_inode->i_fop = */ /* do not need to set to anything */
 196                 } else {
 197                         cFYI(1, ("Init special inode"));
 198                         init_special_inode(inode, inode->i_mode,
 199                                            inode->i_rdev);
 200                 }
 201         }
 202         return rc;
 203 }
 204
 205 static int decode_sfu_inode(struct inode * inode, __u64 size,
 206                             const unsigned char *path,
 207                             struct cifs_sb_info *cifs_sb, int xid)
 208 {
 209         int rc;
 210         int oplock = FALSE;
 211         __u16 netfid;
 212         struct cifsTconInfo *pTcon = cifs_sb->tcon;
 213         char buf[24];
 214         unsigned int bytes_read;
 215         char * pbuf;
 216
 217         pbuf = buf;
 218
 219         if(size == 0) {
 220                 inode->i_mode |= S_IFIFO;
 221                 return 0;
 222         } else if (size < 8) {
 223                 return -EINVAL;  /* EOPNOTSUPP? */
 224         }
 225
 226         rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
 227                          CREATE_NOT_DIR, &netfid, &oplock, NULL,
 228                          cifs_sb->local_nls,
 229                          cifs_sb->mnt_cifs_flags &
 230                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 231         if (rc==0) {
 232                 int buf_type = CIFS_NO_BUFFER;
 233                         /* Read header */
 234                 rc = CIFSSMBRead(xid, pTcon,
 235                                  netfid,
 236                                  24 /* length */, 0 /* offset */,
 237                                  &bytes_read, &pbuf, &buf_type);
 238                 if((rc == 0) && (bytes_read >= 8)) {
 239                         if(memcmp("IntxBLK", pbuf, 8) == 0) {
 240                                 cFYI(1,("Block device"));
 241                                 inode->i_mode |= S_IFBLK;
 242                                 if(bytes_read == 24) {
 243                                         /* we have enough to decode dev num */
 244                                         __u64 mjr; /* major */
 245                                         __u64 mnr; /* minor */
 246                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 247                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 248                                         inode->i_rdev = MKDEV(mjr, mnr);
 249                                 }
 250                         } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
 251                                 cFYI(1,("Char device"));
 252                                 inode->i_mode |= S_IFCHR;
 253                                 if(bytes_read == 24) {
 254                                         /* we have enough to decode dev num */
 255                                         __u64 mjr; /* major */
 256                                         __u64 mnr; /* minor */
 257                                         mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
 258                                         mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
 259                                         inode->i_rdev = MKDEV(mjr, mnr);
 260                                 }
 261                         } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
 262                                 cFYI(1,("Symlink"));
 263                                 inode->i_mode |= S_IFLNK;
 264                         } else {
 265                                 inode->i_mode |= S_IFREG; /* file? */
 266                                 rc = -EOPNOTSUPP;
 267                         }
 268                 } else {
 269                         inode->i_mode |= S_IFREG; /* then it is a file */
 270                         rc = -EOPNOTSUPP; /* or some unknown SFU type */
 271                 }
 272                 CIFSSMBClose(xid, pTcon, netfid);
 273         }
 274         return rc;
 275
 276 }
 277
 278 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID)  /* SETFILEBITS valid bits */
 279
 280 static int get_sfu_uid_mode(struct inode * inode,
 281                         const unsigned char *path,
 282                         struct cifs_sb_info *cifs_sb, int xid)
 283 {
 284 #ifdef CONFIG_CIFS_XATTR
 285         ssize_t rc;
 286         char ea_value[4];
 287         __u32 mode;
 288
 289         rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
 290                         ea_value, 4 /* size of buf */, cifs_sb->local_nls,
 291                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 292         if(rc < 0)
 293                 return (int)rc;
 294         else if (rc > 3) {
 295                 mode = le32_to_cpu(*((__le32 *)ea_value));
 296                 inode->i_mode &= ~SFBITS_MASK;
 297                 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
 298                 inode->i_mode = (mode &  SFBITS_MASK) | inode->i_mode;
 299                 cFYI(1,("special mode bits 0%o", mode));
 300                 return 0;
 301         } else {
 302                 return 0;
 303         }
 304 #else
 305         return -EOPNOTSUPP;
 306 #endif
 307
 308
 309 }
 310
 311 int cifs_get_inode_info(struct inode **pinode,
 312         const unsigned char *search_path, FILE_ALL_INFO *pfindData,
 313         struct super_block *sb, int xid)
 314 {
 315         int rc = 0;
 316         struct cifsTconInfo *pTcon;
 317         struct inode *inode;
 318         struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
 319         char *tmp_path;
 320         char *buf = NULL;
 321
 322         pTcon = cifs_sb->tcon;
 323         cFYI(1,("Getting info on %s", search_path));
 324
 325         if ((pfindData == NULL) && (*pinode != NULL)) {
 326                 if (CIFS_I(*pinode)->clientCanCacheRead) {
 327                         cFYI(1,("No need to revalidate cached inode sizes"));
 328                         return rc;
 329                 }
 330         }
 331
 332         /* if file info not passed in then get it from server */
 333         if (pfindData == NULL) {
 334                 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
 335                 if (buf == NULL)
 336                         return -ENOMEM;
 337                 pfindData = (FILE_ALL_INFO *)buf;
 338                 /* could do find first instead but this returns more info */
 339                 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
 340                               cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
 341                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 342                 /* BB optimize code so we do not make the above call
 343                 when server claims no NT SMB support and the above call
 344                 failed at least once - set flag in tcon or mount */
 345                 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
 346                         rc = SMBQueryInformation(xid, pTcon, search_path,
 347                                         pfindData, cifs_sb->local_nls,
 348                                         cifs_sb->mnt_cifs_flags &
 349                                           CIFS_MOUNT_MAP_SPECIAL_CHR);
 350                 }
 351
 352         }
 353         /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
 354         if (rc) {
 355                 if (rc == -EREMOTE) {
 356                         tmp_path =
 357                             kmalloc(strnlen
 358                                     (pTcon->treeName,
 359                                      MAX_TREE_SIZE + 1) +
 360                                     strnlen(search_path, MAX_PATHCONF) + 1,
 361                                     GFP_KERNEL);
 362                         if (tmp_path == NULL) {
 363                                 kfree(buf);
 364                                 return -ENOMEM;
 365                         }
 366
 367                         strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
 368                         strncat(tmp_path, search_path, MAX_PATHCONF);
 369                         rc = connect_to_dfs_path(xid, pTcon->ses,
 370                                                  /* treename + */ tmp_path,
 371                                                  cifs_sb->local_nls,
 372                                                  cifs_sb->mnt_cifs_flags &
 373                                                    CIFS_MOUNT_MAP_SPECIAL_CHR);
 374                         kfree(tmp_path);
 375                         /* BB fix up inode etc. */
 376                 } else if (rc) {
 377                         kfree(buf);
 378                         return rc;
 379                 }
 380         } else {
 381                 struct cifsInodeInfo *cifsInfo;
 382                 __u32 attr = le32_to_cpu(pfindData->Attributes);
 383
 384                 /* get new inode */
 385                 if (*pinode == NULL) {
 386                         *pinode = new_inode(sb);
 387                         if (*pinode == NULL)
 388                                 return -ENOMEM;
 389                         /* Is an i_ino of zero legal? Can we use that to check
 390                            if the server supports returning inode numbers?  Are
 391                            there other sanity checks we can use to ensure that
 392                            the server is really filling in that field? */
 393
 394                         /* We can not use the IndexNumber field by default from
 395                            Windows or Samba (in ALL_INFO buf) but we can request
 396                            it explicitly.  It may not be unique presumably if
 397                            the server has multiple devices mounted under one
 398                            share */
 399
 400                         /* There may be higher info levels that work but are
 401                            there Windows server or network appliances for which
 402                            IndexNumber field is not guaranteed unique? */
 403
 404                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
 405                                 int rc1 = 0;
 406                                 __u64 inode_num;
 407
 408                                 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
 409                                         search_path, &inode_num,
 410                                         cifs_sb->local_nls,
 411                                         cifs_sb->mnt_cifs_flags &
 412                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 413                                 if (rc1) {
 414                                         cFYI(1,("GetSrvInodeNum rc %d", rc1));
 415                                         /* BB EOPNOSUPP disable SERVER_INUM? */
 416                                 } else /* do we need cast or hash to ino? */
 417                                         (*pinode)->i_ino = inode_num;
 418                         } /* else ino incremented to unique num in new_inode*/
 419                         insert_inode_hash(*pinode);
 420                 }
 421                 inode = *pinode;
 422                 cifsInfo = CIFS_I(inode);
 423                 cifsInfo->cifsAttrs = attr;
 424                 cFYI(1, ("Old time %ld ", cifsInfo->time));
 425                 cifsInfo->time = jiffies;
 426                 cFYI(1, ("New time %ld ", cifsInfo->time));
 427
 428                 /* blksize needs to be multiple of two. So safer to default to
 429                 blksize and blkbits set in superblock so 2**blkbits and blksize
 430                 will match rather than setting to:
 431                 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
 432
 433                 /* Linux can not store file creation time unfortunately so we ignore it */
 434                 inode->i_atime =
 435                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
 436                 inode->i_mtime =
 437                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
 438                 inode->i_ctime =
 439                     cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
 440                 cFYI(0, ("Attributes came in as 0x%x ", attr));
 441
 442                 /* set default mode. will override for dirs below */
 443                 if (atomic_read(&cifsInfo->inUse) == 0)
 444                         /* new inode, can safely set these fields */
 445                         inode->i_mode = cifs_sb->mnt_file_mode;
 446                 else /* since we set the inode type below we need to mask off
 447                      to avoid strange results if type changes and both get orred in */
 448                         inode->i_mode &= ~S_IFMT;
 449 /*              if (attr & ATTR_REPARSE)  */
 450                 /* We no longer handle these as symlinks because we could not
 451                    follow them due to the absolute path with drive letter */
 452                 if (attr & ATTR_DIRECTORY) {
 453                 /* override default perms since we do not do byte range locking
 454                    on dirs */
 455                         inode->i_mode = cifs_sb->mnt_dir_mode;
 456                         inode->i_mode |= S_IFDIR;
 457                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 458                            (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
 459                            /* No need to le64 convert size of zero */
 460                            (pfindData->EndOfFile == 0)) {
 461                         inode->i_mode = cifs_sb->mnt_file_mode;
 462                         inode->i_mode |= S_IFIFO;
 463 /* BB Finish for SFU style symlinks and devices */
 464                 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
 465                            (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
 466                         if (decode_sfu_inode(inode,
 467                                          le64_to_cpu(pfindData->EndOfFile),
 468                                          search_path,
 469                                          cifs_sb, xid)) {
 470                                 cFYI(1,("Unrecognized sfu inode type"));
 471                         }
 472                         cFYI(1,("sfu mode 0%o",inode->i_mode));
 473                 } else {
 474                         inode->i_mode |= S_IFREG;
 475                         /* treat the dos attribute of read-only as read-only
 476                            mode e.g. 555 */
 477                         if (cifsInfo->cifsAttrs & ATTR_READONLY)
 478                                 inode->i_mode &= ~(S_IWUGO);
 479                 /* BB add code here -
 480                    validate if device or weird share or device type? */
 481                 }
 482                 if (is_size_safe_to_change(cifsInfo)) {
 483                         /* can not safely change the file size here if the
 484                            client is writing to it due to potential races */
 485                         i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
 486
 487                         /* 512 bytes (2**9) is the fake blocksize that must be
 488                            used for this calculation */
 489                         inode->i_blocks = (512 - 1 + le64_to_cpu(
 490                                            pfindData->AllocationSize)) >> 9;
 491                 }
 492
 493                 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
 494
 495                 /* BB fill in uid and gid here? with help from winbind?
 496                    or retrieve from NTFS stream extended attribute */
 497                 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
 498                         /* fill in uid, gid, mode from server ACL */
 499                         get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
 500                 } else if (atomic_read(&cifsInfo->inUse) == 0) {
 501                         inode->i_uid = cifs_sb->mnt_uid;
 502                         inode->i_gid = cifs_sb->mnt_gid;
 503                         /* set so we do not keep refreshing these fields with
 504                            bad data after user has changed them in memory */
 505                         atomic_set(&cifsInfo->inUse,1);
 506                 }
 507
 508                 if (S_ISREG(inode->i_mode)) {
 509                         cFYI(1, ("File inode"));
 510                         inode->i_op = &cifs_file_inode_ops;
 511                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
 512                                 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 513                                         inode->i_fop =
 514                                                 &cifs_file_direct_nobrl_ops;
 515                                 else
 516                                         inode->i_fop = &cifs_file_direct_ops;
 517                         } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
 518                                 inode->i_fop = &cifs_file_nobrl_ops;
 519                         else /* not direct, send byte range locks */
 520                                 inode->i_fop = &cifs_file_ops;
 521
 522                         inode->i_data.a_ops = &cifs_addr_ops;
 523                         if(pTcon->ses->server->maxBuf <
 524                              4096 + MAX_CIFS_HDR_SIZE)
 525                                 inode->i_data.a_ops->readpages = NULL;
 526                 } else if (S_ISDIR(inode->i_mode)) {
 527                         cFYI(1, ("Directory inode"));
 528                         inode->i_op = &cifs_dir_inode_ops;
 529                         inode->i_fop = &cifs_dir_ops;
 530                 } else if (S_ISLNK(inode->i_mode)) {
 531                         cFYI(1, ("Symbolic Link inode"));
 532                         inode->i_op = &cifs_symlink_inode_ops;
 533                 } else {
 534                         init_special_inode(inode, inode->i_mode,
 535                                            inode->i_rdev);
 536                 }
 537         }
 538         kfree(buf);
 539         return rc;
 540 }
 541
 542 /* gets root inode */
 543 void cifs_read_inode(struct inode *inode)
 544 {
 545         int xid;
 546         struct cifs_sb_info *cifs_sb;
 547
 548         cifs_sb = CIFS_SB(inode->i_sb);
 549         xid = GetXid();
 550         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
 551                 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
 552         else
 553                 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
 554         /* can not call macro FreeXid here since in a void func */
 555         _FreeXid(xid);
 556 }
 557
 558 int cifs_unlink(struct inode *inode, struct dentry *direntry)
 559 {
 560         int rc = 0;
 561         int xid;
 562         struct cifs_sb_info *cifs_sb;
 563         struct cifsTconInfo *pTcon;
 564         char *full_path = NULL;
 565         struct cifsInodeInfo *cifsInode;
 566         FILE_BASIC_INFO *pinfo_buf;
 567
 568         cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
 569
 570         xid = GetXid();
 571
 572         if(inode)
 573                 cifs_sb = CIFS_SB(inode->i_sb);
 574         else
 575                 cifs_sb = CIFS_SB(direntry->d_sb);
 576         pTcon = cifs_sb->tcon;
 577
 578         /* Unlink can be called from rename so we can not grab the sem here
 579            since we deadlock otherwise */
 580 /*      mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
 581         full_path = build_path_from_dentry(direntry);
 582 /*      mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
 583         if (full_path == NULL) {
 584                 FreeXid(xid);
 585                 return -ENOMEM;
 586         }
 587         rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
 588                         cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 589
 590         if (!rc) {
 591                 if (direntry->d_inode)
 592                         direntry->d_inode->i_nlink--;
 593         } else if (rc == -ENOENT) {
 594                 d_drop(direntry);
 595         } else if (rc == -ETXTBSY) {
 596                 int oplock = FALSE;
 597                 __u16 netfid;
 598
 599                 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
 600                                  CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
 601                                  &netfid, &oplock, NULL, cifs_sb->local_nls,
 602                                  cifs_sb->mnt_cifs_flags &
 603                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 604                 if (rc==0) {
 605                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
 606                                               cifs_sb->local_nls,
 607                                               cifs_sb->mnt_cifs_flags &
 608                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 609                         CIFSSMBClose(xid, pTcon, netfid);
 610                         if (direntry->d_inode)
 611                                 direntry->d_inode->i_nlink--;
 612                 }
 613         } else if (rc == -EACCES) {
 614                 /* try only if r/o attribute set in local lookup data? */
 615                 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
 616                 if (pinfo_buf) {
 617                         /* ATTRS set to normal clears r/o bit */
 618                         pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
 619                         if (!(pTcon->ses->flags & CIFS_SES_NT4))
 620                                 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
 621                                                      pinfo_buf,
 622                                                      cifs_sb->local_nls,
 623                                                      cifs_sb->mnt_cifs_flags &
 624                                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 625                         else
 626                                 rc = -EOPNOTSUPP;
 627
 628                         if (rc == -EOPNOTSUPP) {
 629                                 int oplock = FALSE;
 630                                 __u16 netfid;
 631                         /*      rc = CIFSSMBSetAttrLegacy(xid, pTcon,
 632                                                           full_path,
 633                                                           (__u16)ATTR_NORMAL,
 634                                                           cifs_sb->local_nls);
 635                            For some strange reason it seems that NT4 eats the
 636                            old setattr call without actually setting the
 637                            attributes so on to the third attempted workaround
 638                            */
 639
 640                         /* BB could scan to see if we already have it open
 641                            and pass in pid of opener to function */
 642                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 643                                                  FILE_OPEN, SYNCHRONIZE |
 644                                                  FILE_WRITE_ATTRIBUTES, 0,
 645                                                  &netfid, &oplock, NULL,
 646                                                  cifs_sb->local_nls,
 647                                                  cifs_sb->mnt_cifs_flags &
 648                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 649                                 if (rc==0) {
 650                                         rc = CIFSSMBSetFileTimes(xid, pTcon,
 651                                                                  pinfo_buf,
 652                                                                  netfid);
 653                                         CIFSSMBClose(xid, pTcon, netfid);
 654                                 }
 655                         }
 656                         kfree(pinfo_buf);
 657                 }
 658                 if (rc==0) {
 659                         rc = CIFSSMBDelFile(xid, pTcon, full_path,
 660                                             cifs_sb->local_nls,
 661                                             cifs_sb->mnt_cifs_flags &
 662                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 663                         if (!rc) {
 664                                 if (direntry->d_inode)
 665                                         direntry->d_inode->i_nlink--;
 666                         } else if (rc == -ETXTBSY) {
 667                                 int oplock = FALSE;
 668                                 __u16 netfid;
 669
 670                                 rc = CIFSSMBOpen(xid, pTcon, full_path,
 671                                                  FILE_OPEN, DELETE,
 672                                                  CREATE_NOT_DIR |
 673                                                  CREATE_DELETE_ON_CLOSE,
 674                                                  &netfid, &oplock, NULL,
 675                                                  cifs_sb->local_nls,
 676                                                  cifs_sb->mnt_cifs_flags &
 677                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 678                                 if (rc==0) {
 679                                         CIFSSMBRenameOpenFile(xid, pTcon,
 680                                                 netfid, NULL,
 681                                                 cifs_sb->local_nls,
 682                                                 cifs_sb->mnt_cifs_flags &
 683                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 684                                         CIFSSMBClose(xid, pTcon, netfid);
 685                                         if (direntry->d_inode)
 686                                                 direntry->d_inode->i_nlink--;
 687                                 }
 688                         /* BB if rc = -ETXTBUSY goto the rename logic BB */
 689                         }
 690                 }
 691         }
 692         if (direntry->d_inode) {
 693                 cifsInode = CIFS_I(direntry->d_inode);
 694                 cifsInode->time = 0;    /* will force revalidate to get info
 695                                            when needed */
 696                 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
 697         }
 698         if(inode) {
 699                 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
 700                 cifsInode = CIFS_I(inode);
 701                 cifsInode->time = 0;    /* force revalidate of dir as well */
 702         }
 703
 704         kfree(full_path);
 705         FreeXid(xid);
 706         return rc;
 707 }
 708
 709 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
 710 {
 711         int rc = 0;
 712         int xid;
 713         struct cifs_sb_info *cifs_sb;
 714         struct cifsTconInfo *pTcon;
 715         char *full_path = NULL;
 716         struct inode *newinode = NULL;
 717
 718         cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
 719
 720         xid = GetXid();
 721
 722         cifs_sb = CIFS_SB(inode->i_sb);
 723         pTcon = cifs_sb->tcon;
 724
 725         mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
 726         full_path = build_path_from_dentry(direntry);
 727         mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
 728         if (full_path == NULL) {
 729                 FreeXid(xid);
 730                 return -ENOMEM;
 731         }
 732         /* BB add setting the equivalent of mode via CreateX w/ACLs */
 733         rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
 734                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 735         if (rc) {
 736                 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
 737                 d_drop(direntry);
 738         } else {
 739                 inode->i_nlink++;
 740                 if (pTcon->ses->capabilities & CAP_UNIX)
 741                         rc = cifs_get_inode_info_unix(&newinode, full_path,
 742                                                       inode->i_sb,xid);
 743                 else
 744                         rc = cifs_get_inode_info(&newinode, full_path, NULL,
 745                                                  inode->i_sb,xid);
 746
 747                 if (pTcon->nocase)
 748                         direntry->d_op = &cifs_ci_dentry_ops;
 749                 else
 750                         direntry->d_op = &cifs_dentry_ops;
 751                 d_instantiate(direntry, newinode);
 752                 if (direntry->d_inode)
 753                         direntry->d_inode->i_nlink = 2;
 754                 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
 755                         if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
 756                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 757                                                     mode,
 758                                                     (__u64)current->fsuid,
 759                                                     (__u64)current->fsgid,
 760                                                     0 /* dev_t */,
 761                                                     cifs_sb->local_nls,
 762                                                     cifs_sb->mnt_cifs_flags &
 763                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 764                         } else {
 765                                 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
 766                                                     mode, (__u64)-1,
 767                                                     (__u64)-1, 0 /* dev_t */,
 768                                                     cifs_sb->local_nls,
 769                                                     cifs_sb->mnt_cifs_flags &
 770                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 771                         }
 772                 else {
 773                         /* BB to be implemented via Windows secrty descriptors
 774                            eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
 775                                                  -1, -1, local_nls); */
 776                         if(direntry->d_inode) {
 777                                 direntry->d_inode->i_mode = mode;
 778                                 direntry->d_inode->i_mode |= S_IFDIR;
 779                                 if(cifs_sb->mnt_cifs_flags &
 780                                      CIFS_MOUNT_SET_UID) {
 781                                         direntry->d_inode->i_uid =
 782                                                 current->fsuid;
 783                                         direntry->d_inode->i_gid =
 784                                                 current->fsgid;
 785                                 }
 786                         }
 787                 }
 788         }
 789         kfree(full_path);
 790         FreeXid(xid);
 791         return rc;
 792 }
 793
 794 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
 795 {
 796         int rc = 0;
 797         int xid;
 798         struct cifs_sb_info *cifs_sb;
 799         struct cifsTconInfo *pTcon;
 800         char *full_path = NULL;
 801         struct cifsInodeInfo *cifsInode;
 802
 803         cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
 804
 805         xid = GetXid();
 806
 807         cifs_sb = CIFS_SB(inode->i_sb);
 808         pTcon = cifs_sb->tcon;
 809
 810         mutex_lock(&inode->i_sb->s_vfs_rename_mutex);
 811         full_path = build_path_from_dentry(direntry);
 812         mutex_unlock(&inode->i_sb->s_vfs_rename_mutex);
 813         if (full_path == NULL) {
 814                 FreeXid(xid);
 815                 return -ENOMEM;
 816         }
 817
 818         rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
 819                           cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
 820
 821         if (!rc) {
 822                 inode->i_nlink--;
 823                 i_size_write(direntry->d_inode,0);
 824                 direntry->d_inode->i_nlink = 0;
 825         }
 826
 827         cifsInode = CIFS_I(direntry->d_inode);
 828         cifsInode->time = 0;    /* force revalidate to go get info when
 829                                    needed */
 830         direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
 831                 current_fs_time(inode->i_sb);
 832
 833         kfree(full_path);
 834         FreeXid(xid);
 835         return rc;
 836 }
 837
 838 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
 839         struct inode *target_inode, struct dentry *target_direntry)
 840 {
 841         char *fromName;
 842         char *toName;
 843         struct cifs_sb_info *cifs_sb_source;
 844         struct cifs_sb_info *cifs_sb_target;
 845         struct cifsTconInfo *pTcon;
 846         int xid;
 847         int rc = 0;
 848
 849         xid = GetXid();
 850
 851         cifs_sb_target = CIFS_SB(target_inode->i_sb);
 852         cifs_sb_source = CIFS_SB(source_inode->i_sb);
 853         pTcon = cifs_sb_source->tcon;
 854
 855         if (pTcon != cifs_sb_target->tcon) {
 856                 FreeXid(xid);
 857                 return -EXDEV;  /* BB actually could be allowed if same server,
 858                                    but different share.
 859                                    Might eventually add support for this */
 860         }
 861
 862         /* we already  have the rename sem so we do not need to grab it again
 863            here to protect the path integrity */
 864         fromName = build_path_from_dentry(source_direntry);
 865         toName = build_path_from_dentry(target_direntry);
 866         if ((fromName == NULL) || (toName == NULL)) {
 867                 rc = -ENOMEM;
 868                 goto cifs_rename_exit;
 869         }
 870
 871         rc = CIFSSMBRename(xid, pTcon, fromName, toName,
 872                            cifs_sb_source->local_nls,
 873                            cifs_sb_source->mnt_cifs_flags &
 874                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 875         if (rc == -EEXIST) {
 876                 /* check if they are the same file because rename of hardlinked
 877                    files is a noop */
 878                 FILE_UNIX_BASIC_INFO *info_buf_source;
 879                 FILE_UNIX_BASIC_INFO *info_buf_target;
 880
 881                 info_buf_source =
 882                         kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
 883                 if (info_buf_source != NULL) {
 884                         info_buf_target = info_buf_source + 1;
 885                         rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
 886                                 info_buf_source, cifs_sb_source->local_nls,
 887                                 cifs_sb_source->mnt_cifs_flags &
 888                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 889                         if (rc == 0) {
 890                                 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
 891                                                 info_buf_target,
 892                                                 cifs_sb_target->local_nls,
 893                                                 /* remap based on source sb */
 894                                                 cifs_sb_source->mnt_cifs_flags &
 895                                                     CIFS_MOUNT_MAP_SPECIAL_CHR);
 896                         }
 897                         if ((rc == 0) &&
 898                             (info_buf_source->UniqueId ==
 899                              info_buf_target->UniqueId)) {
 900                         /* do not rename since the files are hardlinked which
 901                            is a noop */
 902                         } else {
 903                         /* we either can not tell the files are hardlinked
 904                            (as with Windows servers) or files are not
 905                            hardlinked so delete the target manually before
 906                            renaming to follow POSIX rather than Windows
 907                            semantics */
 908                                 cifs_unlink(target_inode, target_direntry);
 909                                 rc = CIFSSMBRename(xid, pTcon, fromName,
 910                                                    toName,
 911                                                    cifs_sb_source->local_nls,
 912                                                    cifs_sb_source->mnt_cifs_flags
 913                                                    & CIFS_MOUNT_MAP_SPECIAL_CHR);
 914                         }
 915                         kfree(info_buf_source);
 916                 } /* if we can not get memory just leave rc as EEXIST */
 917         }
 918
 919         if (rc) {
 920                 cFYI(1, ("rename rc %d", rc));
 921         }
 922
 923         if ((rc == -EIO) || (rc == -EEXIST)) {
 924                 int oplock = FALSE;
 925                 __u16 netfid;
 926
 927                 /* BB FIXME Is Generic Read correct for rename? */
 928                 /* if renaming directory - we should not say CREATE_NOT_DIR,
 929                    need to test renaming open directory, also GENERIC_READ
 930                    might not right be right access to request */
 931                 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
 932                                  CREATE_NOT_DIR, &netfid, &oplock, NULL,
 933                                  cifs_sb_source->local_nls,
 934                                  cifs_sb_source->mnt_cifs_flags &
 935                                         CIFS_MOUNT_MAP_SPECIAL_CHR);
 936                 if (rc==0) {
 937                         CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
 938                                               cifs_sb_source->local_nls,
 939                                               cifs_sb_source->mnt_cifs_flags &
 940                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
 941                         CIFSSMBClose(xid, pTcon, netfid);
 942                 }
 943         }
 944
 945 cifs_rename_exit:
 946         kfree(fromName);
 947         kfree(toName);
 948         FreeXid(xid);
 949         return rc;
 950 }
 951
 952 int cifs_revalidate(struct dentry *direntry)
 953 {
 954         int xid;
 955         int rc = 0;
 956         char *full_path;
 957         struct cifs_sb_info *cifs_sb;
 958         struct cifsInodeInfo *cifsInode;
 959         loff_t local_size;
 960         struct timespec local_mtime;
 961         int invalidate_inode = FALSE;
 962
 963         if (direntry->d_inode == NULL)
 964                 return -ENOENT;
 965
 966         cifsInode = CIFS_I(direntry->d_inode);
 967
 968         if (cifsInode == NULL)
 969                 return -ENOENT;
 970
 971         /* no sense revalidating inode info on file that no one can write */
 972         if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
 973                 return rc;
 974
 975         xid = GetXid();
 976
 977         cifs_sb = CIFS_SB(direntry->d_sb);
 978
 979         /* can not safely grab the rename sem here if rename calls revalidate
 980            since that would deadlock */
 981         full_path = build_path_from_dentry(direntry);
 982         if (full_path == NULL) {
 983                 FreeXid(xid);
 984                 return -ENOMEM;
 985         }
 986         cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
 987                  "jiffies %ld", full_path, direntry->d_inode,
 988                  direntry->d_inode->i_count.counter, direntry,
 989                  direntry->d_time, jiffies));
 990
 991         if (cifsInode->time == 0) {
 992                 /* was set to zero previously to force revalidate */
 993         } else if (time_before(jiffies, cifsInode->time + HZ) &&
 994                    lookupCacheEnabled) {
 995                 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
 996                     (direntry->d_inode->i_nlink == 1)) {
 997                         kfree(full_path);
 998                         FreeXid(xid);
 999                         return rc;
1000                 } else {
1001                         cFYI(1, ("Have to revalidate file due to hardlinks"));
1002                 }
1003         }
1004
1005         /* save mtime and size */
1006         local_mtime = direntry->d_inode->i_mtime;
1007         local_size = direntry->d_inode->i_size;
1008
1009         if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1010                 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1011                                               direntry->d_sb,xid);
1012                 if (rc) {
1013                         cFYI(1, ("error on getting revalidate info %d", rc));
1014 /*                      if (rc != -ENOENT)
1015                                 rc = 0; */      /* BB should we cache info on
1016                                                    certain errors? */
1017                 }
1018         } else {
1019                 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1020                                          direntry->d_sb,xid);
1021                 if (rc) {
1022                         cFYI(1, ("error on getting revalidate info %d", rc));
1023 /*                      if (rc != -ENOENT)
1024                                 rc = 0; */      /* BB should we cache info on
1025                                                    certain errors? */
1026                 }
1027         }
1028         /* should we remap certain errors, access denied?, to zero */
1029
1030         /* if not oplocked, we invalidate inode pages if mtime or file size
1031            had changed on server */
1032
1033         if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1034             (local_size == direntry->d_inode->i_size)) {
1035                 cFYI(1, ("cifs_revalidate - inode unchanged"));
1036         } else {
1037                 /* file may have changed on server */
1038                 if (cifsInode->clientCanCacheRead) {
1039                         /* no need to invalidate inode pages since we were the
1040                            only ones who could have modified the file and the
1041                            server copy is staler than ours */
1042                 } else {
1043                         invalidate_inode = TRUE;
1044                 }
1045         }
1046
1047         /* can not grab this sem since kernel filesys locking documentation
1048            indicates i_mutex may be taken by the kernel on lookup and rename
1049            which could deadlock if we grab the i_mutex here as well */
1050 /*      mutex_lock(&direntry->d_inode->i_mutex);*/
1051         /* need to write out dirty pages here  */
1052         if (direntry->d_inode->i_mapping) {
1053                 /* do we need to lock inode until after invalidate completes
1054                    below? */
1055                 filemap_fdatawrite(direntry->d_inode->i_mapping);
1056         }
1057         if (invalidate_inode) {
1058         /* shrink_dcache not necessary now that cifs dentry ops
1059         are exported for negative dentries */
1060 /*              if(S_ISDIR(direntry->d_inode->i_mode))
1061                         shrink_dcache_parent(direntry); */
1062                 if (S_ISREG(direntry->d_inode->i_mode)) {
1063                         if (direntry->d_inode->i_mapping)
1064                                 filemap_fdatawait(direntry->d_inode->i_mapping);
1065                         /* may eventually have to do this for open files too */
1066                         if (list_empty(&(cifsInode->openFileList))) {
1067                                 /* changed on server - flush read ahead pages */
1068                                 cFYI(1, ("Invalidating read ahead data on "
1069                                          "closed file"));
1070                                 invalidate_remote_inode(direntry->d_inode);
1071                         }
1072                 }
1073         }
1074 /*      mutex_unlock(&direntry->d_inode->i_mutex); */
1075
1076         kfree(full_path);
1077         FreeXid(xid);
1078         return rc;
1079 }
1080
1081 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1082         struct kstat *stat)
1083 {
1084         int err = cifs_revalidate(dentry);
1085         if (!err)
1086                 generic_fillattr(dentry->d_inode, stat);
1087         return err;
1088 }
1089
1090 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1091 {
1092         pgoff_t index = from >> PAGE_CACHE_SHIFT;
1093         unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1094         struct page *page;
1095         char *kaddr;
1096         int rc = 0;
1097
1098         page = grab_cache_page(mapping, index);
1099         if (!page)
1100                 return -ENOMEM;
1101
1102         kaddr = kmap_atomic(page, KM_USER0);
1103         memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1104         flush_dcache_page(page);
1105         kunmap_atomic(kaddr, KM_USER0);
1106         unlock_page(page);
1107         page_cache_release(page);
1108         return rc;
1109 }
1110
1111 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1112 {
1113         int xid;
1114         struct cifs_sb_info *cifs_sb;
1115         struct cifsTconInfo *pTcon;
1116         char *full_path = NULL;
1117         int rc = -EACCES;
1118         struct cifsFileInfo *open_file = NULL;
1119         FILE_BASIC_INFO time_buf;
1120         int set_time = FALSE;
1121         __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1122         __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1123         __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1124         struct cifsInodeInfo *cifsInode;
1125
1126         xid = GetXid();
1127
1128         cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1129                  direntry->d_name.name, attrs->ia_valid));
1130
1131         cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1132         pTcon = cifs_sb->tcon;
1133
1134         if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1135                 /* check if we have permission to change attrs */
1136                 rc = inode_change_ok(direntry->d_inode, attrs);
1137                 if(rc < 0) {
1138                         FreeXid(xid);
1139                         return rc;
1140                 } else
1141                         rc = 0;
1142         }
1143
1144         mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);
1145         full_path = build_path_from_dentry(direntry);
1146         mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);
1147         if (full_path == NULL) {
1148                 FreeXid(xid);
1149                 return -ENOMEM;
1150         }
1151         cifsInode = CIFS_I(direntry->d_inode);
1152
1153         /* BB check if we need to refresh inode from server now ? BB */
1154
1155         /* need to flush data before changing file size on server */
1156         filemap_write_and_wait(direntry->d_inode->i_mapping);
1157
1158         if (attrs->ia_valid & ATTR_SIZE) {
1159                 /* To avoid spurious oplock breaks from server, in the case of
1160                    inodes that we already have open, avoid doing path based
1161                    setting of file size if we can do it by handle.
1162                    This keeps our caching token (oplock) and avoids timeouts
1163                    when the local oplock break takes longer to flush
1164                    writebehind data than the SMB timeout for the SetPathInfo
1165                    request would allow */
1166                 open_file = find_writable_file(cifsInode);
1167                 if (open_file) {
1168                         __u16 nfid = open_file->netfid;
1169                         __u32 npid = open_file->pid;
1170                         rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1171                                                 nfid, npid, FALSE);
1172                         atomic_dec(&open_file->wrtPending);
1173                         cFYI(1,("SetFSize for attrs rc = %d", rc));
1174                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1175                                 int bytes_written;
1176                                 rc = CIFSSMBWrite(xid, pTcon,
1177                                                   nfid, 0, attrs->ia_size,
1178                                                   &bytes_written, NULL, NULL,
1179                                                   1 /* 45 seconds */);
1180                                 cFYI(1,("Wrt seteof rc %d", rc));
1181                         }
1182                 } else
1183                         rc = -EINVAL;
1184
1185                 if (rc != 0) {
1186                         /* Set file size by pathname rather than by handle
1187                            either because no valid, writeable file handle for
1188                            it was found or because there was an error setting
1189                            it by handle */
1190                         rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1191                                            attrs->ia_size, FALSE,
1192                                            cifs_sb->local_nls,
1193                                            cifs_sb->mnt_cifs_flags &
1194                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1195                         cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1196                         if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1197                                 __u16 netfid;
1198                                 int oplock = FALSE;
1199
1200                                 rc = SMBLegacyOpen(xid, pTcon, full_path,
1201                                         FILE_OPEN,
1202                                         SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1203                                         CREATE_NOT_DIR, &netfid, &oplock,
1204                                         NULL, cifs_sb->local_nls,
1205                                         cifs_sb->mnt_cifs_flags &
1206                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1207                                 if (rc==0) {
1208                                         int bytes_written;
1209                                         rc = CIFSSMBWrite(xid, pTcon,
1210                                                         netfid, 0,
1211                                                         attrs->ia_size,
1212                                                         &bytes_written, NULL,
1213                                                         NULL, 1 /* 45 sec */);
1214                                         cFYI(1,("wrt seteof rc %d",rc));
1215                                         CIFSSMBClose(xid, pTcon, netfid);
1216                                 }
1217
1218                         }
1219                 }
1220
1221                 /* Server is ok setting allocation size implicitly - no need
1222                    to call:
1223                 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1224                          cifs_sb->local_nls);
1225                    */
1226
1227                 if (rc == 0) {
1228                         rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1229                         cifs_truncate_page(direntry->d_inode->i_mapping,
1230                                            direntry->d_inode->i_size);
1231                 } else
1232                         goto cifs_setattr_exit;
1233         }
1234         if (attrs->ia_valid & ATTR_UID) {
1235                 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1236                 uid = attrs->ia_uid;
1237         }
1238         if (attrs->ia_valid & ATTR_GID) {
1239                 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1240                 gid = attrs->ia_gid;
1241         }
1242
1243         time_buf.Attributes = 0;
1244         if (attrs->ia_valid & ATTR_MODE) {
1245                 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1246                 mode = attrs->ia_mode;
1247         }
1248
1249         if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1250             && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1251                 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1252                                          0 /* dev_t */, cifs_sb->local_nls,
1253                                          cifs_sb->mnt_cifs_flags &
1254                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1255         else if (attrs->ia_valid & ATTR_MODE) {
1256                 rc = 0;
1257                 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1258                         if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1259                                 time_buf.Attributes =
1260                                         cpu_to_le32(cifsInode->cifsAttrs |
1261                                                     ATTR_READONLY);
1262                 } else if ((mode & S_IWUGO) == S_IWUGO) {
1263                         if (cifsInode->cifsAttrs & ATTR_READONLY)
1264                                 time_buf.Attributes =
1265                                         cpu_to_le32(cifsInode->cifsAttrs &
1266                                                     (~ATTR_READONLY));
1267                 }
1268                 /* BB to be implemented -
1269                    via Windows security descriptors or streams */
1270                 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1271                                       cifs_sb->local_nls); */
1272         }
1273
1274         if (attrs->ia_valid & ATTR_ATIME) {
1275                 set_time = TRUE;
1276                 time_buf.LastAccessTime =
1277                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1278         } else
1279                 time_buf.LastAccessTime = 0;
1280
1281         if (attrs->ia_valid & ATTR_MTIME) {
1282                 set_time = TRUE;
1283                 time_buf.LastWriteTime =
1284                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1285         } else
1286                 time_buf.LastWriteTime = 0;
1287         /* Do not set ctime explicitly unless other time
1288            stamps are changed explicitly (i.e. by utime()
1289            since we would then have a mix of client and
1290            server times */
1291
1292         if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1293                 set_time = TRUE;
1294                 /* Although Samba throws this field away
1295                 it may be useful to Windows - but we do
1296                 not want to set ctime unless some other
1297                 timestamp is changing */
1298                 cFYI(1, ("CIFS - CTIME changed "));
1299                 time_buf.ChangeTime =
1300                     cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1301         } else
1302                 time_buf.ChangeTime = 0;
1303
1304         if (set_time || time_buf.Attributes) {
1305                 time_buf.CreationTime = 0;      /* do not change */
1306                 /* In the future we should experiment - try setting timestamps
1307                    via Handle (SetFileInfo) instead of by path */
1308                 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1309                         rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1310                                              cifs_sb->local_nls,
1311                                              cifs_sb->mnt_cifs_flags &
1312                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1313                 else
1314                         rc = -EOPNOTSUPP;
1315
1316                 if (rc == -EOPNOTSUPP) {
1317                         int oplock = FALSE;
1318                         __u16 netfid;
1319
1320                         cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1321                                  "times not supported by this server"));
1322                         /* BB we could scan to see if we already have it open
1323                            and pass in pid of opener to function */
1324                         rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1325                                          SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1326                                          CREATE_NOT_DIR, &netfid, &oplock,
1327                                          NULL, cifs_sb->local_nls,
1328                                          cifs_sb->mnt_cifs_flags &
1329                                                 CIFS_MOUNT_MAP_SPECIAL_CHR);
1330                         if (rc==0) {
1331                                 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1332                                                          netfid);
1333                                 CIFSSMBClose(xid, pTcon, netfid);
1334                         } else {
1335                         /* BB For even older servers we could convert time_buf
1336                            into old DOS style which uses two second
1337                            granularity */
1338
1339                         /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1340                                         &time_buf, cifs_sb->local_nls); */
1341                         }
1342                 }
1343                 /* Even if error on time set, no sense failing the call if
1344                 the server would set the time to a reasonable value anyway,
1345                 and this check ensures that we are not being called from
1346                 sys_utimes in which case we ought to fail the call back to
1347                 the user when the server rejects the call */
1348                 if((rc) && (attrs->ia_valid &&
1349                          (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1350                         rc = 0;
1351         }
1352
1353         /* do not need local check to inode_check_ok since the server does
1354            that */
1355         if (!rc)
1356                 rc = inode_setattr(direntry->d_inode, attrs);
1357 cifs_setattr_exit:
1358         kfree(full_path);
1359         FreeXid(xid);
1360         return rc;
1361 }
1362
1363 void cifs_delete_inode(struct inode *inode)
1364 {
1365         cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1366         /* may have to add back in if and when safe distributed caching of
1367            directories added e.g. via FindNotify */
1368 }