| 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 | cifsInfo->delete_pending = pfindData->DeletePending ? true : false; |
| 510 | cFYI(1, ("Old time %ld", cifsInfo->time)); |
| 511 | cifsInfo->time = jiffies; |
| 512 | cFYI(1, ("New time %ld", cifsInfo->time)); |
| 513 | |
| 514 | /* blksize needs to be multiple of two. So safer to default to |
| 515 | blksize and blkbits set in superblock so 2**blkbits and blksize |
| 516 | will match rather than setting to: |
| 517 | (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/ |
| 518 | |
| 519 | /* Linux can not store file creation time so ignore it */ |
| 520 | if (pfindData->LastAccessTime) |
| 521 | inode->i_atime = cifs_NTtimeToUnix |
| 522 | (le64_to_cpu(pfindData->LastAccessTime)); |
| 523 | else /* do not need to use current_fs_time - time not stored */ |
| 524 | inode->i_atime = CURRENT_TIME; |
| 525 | inode->i_mtime = |
| 526 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime)); |
| 527 | inode->i_ctime = |
| 528 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime)); |
| 529 | cFYI(DBG2, ("Attributes came in as 0x%x", attr)); |
| 530 | if (adjustTZ && (pTcon->ses) && (pTcon->ses->server)) { |
| 531 | inode->i_ctime.tv_sec += pTcon->ses->server->timeAdj; |
| 532 | inode->i_mtime.tv_sec += pTcon->ses->server->timeAdj; |
| 533 | } |
| 534 | |
| 535 | /* get default inode mode */ |
| 536 | if (attr & ATTR_DIRECTORY) |
| 537 | default_mode = cifs_sb->mnt_dir_mode; |
| 538 | else |
| 539 | default_mode = cifs_sb->mnt_file_mode; |
| 540 | |
| 541 | /* set permission bits */ |
| 542 | if (atomic_read(&cifsInfo->inUse) == 0 || |
| 543 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) |
| 544 | inode->i_mode = default_mode; |
| 545 | else { |
| 546 | /* just reenable write bits if !ATTR_READONLY */ |
| 547 | if ((inode->i_mode & S_IWUGO) == 0 && |
| 548 | (attr & ATTR_READONLY) == 0) |
| 549 | inode->i_mode |= (S_IWUGO & default_mode); |
| 550 | |
| 551 | inode->i_mode &= ~S_IFMT; |
| 552 | } |
| 553 | /* clear write bits if ATTR_READONLY is set */ |
| 554 | if (attr & ATTR_READONLY) |
| 555 | inode->i_mode &= ~S_IWUGO; |
| 556 | |
| 557 | /* set inode type */ |
| 558 | if ((attr & ATTR_SYSTEM) && |
| 559 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) { |
| 560 | /* no need to fix endianness on 0 */ |
| 561 | if (pfindData->EndOfFile == 0) |
| 562 | inode->i_mode |= S_IFIFO; |
| 563 | else if (decode_sfu_inode(inode, |
| 564 | le64_to_cpu(pfindData->EndOfFile), |
| 565 | full_path, cifs_sb, xid)) |
| 566 | cFYI(1, ("unknown SFU file type\n")); |
| 567 | } else { |
| 568 | if (attr & ATTR_DIRECTORY) |
| 569 | inode->i_mode |= S_IFDIR; |
| 570 | else |
| 571 | inode->i_mode |= S_IFREG; |
| 572 | } |
| 573 | |
| 574 | spin_lock(&inode->i_lock); |
| 575 | if (is_size_safe_to_change(cifsInfo, |
| 576 | le64_to_cpu(pfindData->EndOfFile))) { |
| 577 | /* can not safely shrink the file size here if the |
| 578 | client is writing to it due to potential races */ |
| 579 | i_size_write(inode, le64_to_cpu(pfindData->EndOfFile)); |
| 580 | |
| 581 | /* 512 bytes (2**9) is the fake blocksize that must be |
| 582 | used for this calculation */ |
| 583 | inode->i_blocks = (512 - 1 + le64_to_cpu( |
| 584 | pfindData->AllocationSize)) >> 9; |
| 585 | } |
| 586 | spin_unlock(&inode->i_lock); |
| 587 | |
| 588 | inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks); |
| 589 | |
| 590 | /* BB fill in uid and gid here? with help from winbind? |
| 591 | or retrieve from NTFS stream extended attribute */ |
| 592 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 593 | /* fill in 0777 bits from ACL */ |
| 594 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) { |
| 595 | cFYI(1, ("Getting mode bits from ACL")); |
| 596 | acl_to_uid_mode(inode, full_path, pfid); |
| 597 | } |
| 598 | #endif |
| 599 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) { |
| 600 | /* fill in remaining high mode bits e.g. SUID, VTX */ |
| 601 | get_sfu_mode(inode, full_path, cifs_sb, xid); |
| 602 | } else if (atomic_read(&cifsInfo->inUse) == 0) { |
| 603 | inode->i_uid = cifs_sb->mnt_uid; |
| 604 | inode->i_gid = cifs_sb->mnt_gid; |
| 605 | /* set so we do not keep refreshing these fields with |
| 606 | bad data after user has changed them in memory */ |
| 607 | atomic_set(&cifsInfo->inUse, 1); |
| 608 | } |
| 609 | |
| 610 | cifs_set_ops(inode, is_dfs_referral); |
| 611 | |
| 612 | |
| 613 | |
| 614 | |
| 615 | cgii_exit: |
| 616 | kfree(buf); |
| 617 | return rc; |
| 618 | } |
| 619 | |
| 620 | static const struct inode_operations cifs_ipc_inode_ops = { |
| 621 | .lookup = cifs_lookup, |
| 622 | }; |
| 623 | |
| 624 | /* gets root inode */ |
| 625 | struct inode *cifs_iget(struct super_block *sb, unsigned long ino) |
| 626 | { |
| 627 | int xid; |
| 628 | struct cifs_sb_info *cifs_sb; |
| 629 | struct inode *inode; |
| 630 | long rc; |
| 631 | |
| 632 | inode = iget_locked(sb, ino); |
| 633 | if (!inode) |
| 634 | return ERR_PTR(-ENOMEM); |
| 635 | if (!(inode->i_state & I_NEW)) |
| 636 | return inode; |
| 637 | |
| 638 | cifs_sb = CIFS_SB(inode->i_sb); |
| 639 | xid = GetXid(); |
| 640 | |
| 641 | if (cifs_sb->tcon->unix_ext) |
| 642 | rc = cifs_get_inode_info_unix(&inode, "", inode->i_sb, xid); |
| 643 | else |
| 644 | rc = cifs_get_inode_info(&inode, "", NULL, inode->i_sb, xid, |
| 645 | NULL); |
| 646 | if (rc && cifs_sb->tcon->ipc) { |
| 647 | cFYI(1, ("ipc connection - fake read inode")); |
| 648 | inode->i_mode |= S_IFDIR; |
| 649 | inode->i_nlink = 2; |
| 650 | inode->i_op = &cifs_ipc_inode_ops; |
| 651 | inode->i_fop = &simple_dir_operations; |
| 652 | inode->i_uid = cifs_sb->mnt_uid; |
| 653 | inode->i_gid = cifs_sb->mnt_gid; |
| 654 | } else if (rc) { |
| 655 | _FreeXid(xid); |
| 656 | iget_failed(inode); |
| 657 | return ERR_PTR(rc); |
| 658 | } |
| 659 | |
| 660 | unlock_new_inode(inode); |
| 661 | |
| 662 | /* can not call macro FreeXid here since in a void func |
| 663 | * TODO: This is no longer true |
| 664 | */ |
| 665 | _FreeXid(xid); |
| 666 | return inode; |
| 667 | } |
| 668 | |
| 669 | static int |
| 670 | cifs_set_file_info(struct inode *inode, struct iattr *attrs, int xid, |
| 671 | char *full_path, __u32 dosattr) |
| 672 | { |
| 673 | int rc; |
| 674 | int oplock = 0; |
| 675 | __u16 netfid; |
| 676 | __u32 netpid; |
| 677 | bool set_time = false; |
| 678 | struct cifsFileInfo *open_file; |
| 679 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 680 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 681 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 682 | FILE_BASIC_INFO info_buf; |
| 683 | |
| 684 | if (attrs->ia_valid & ATTR_ATIME) { |
| 685 | set_time = true; |
| 686 | info_buf.LastAccessTime = |
| 687 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime)); |
| 688 | } else |
| 689 | info_buf.LastAccessTime = 0; |
| 690 | |
| 691 | if (attrs->ia_valid & ATTR_MTIME) { |
| 692 | set_time = true; |
| 693 | info_buf.LastWriteTime = |
| 694 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime)); |
| 695 | } else |
| 696 | info_buf.LastWriteTime = 0; |
| 697 | |
| 698 | /* |
| 699 | * Samba throws this field away, but windows may actually use it. |
| 700 | * Do not set ctime unless other time stamps are changed explicitly |
| 701 | * (i.e. by utimes()) since we would then have a mix of client and |
| 702 | * server times. |
| 703 | */ |
| 704 | if (set_time && (attrs->ia_valid & ATTR_CTIME)) { |
| 705 | cFYI(1, ("CIFS - CTIME changed")); |
| 706 | info_buf.ChangeTime = |
| 707 | cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime)); |
| 708 | } else |
| 709 | info_buf.ChangeTime = 0; |
| 710 | |
| 711 | info_buf.CreationTime = 0; /* don't change */ |
| 712 | info_buf.Attributes = cpu_to_le32(dosattr); |
| 713 | |
| 714 | /* |
| 715 | * If the file is already open for write, just use that fileid |
| 716 | */ |
| 717 | open_file = find_writable_file(cifsInode); |
| 718 | if (open_file) { |
| 719 | netfid = open_file->netfid; |
| 720 | netpid = open_file->pid; |
| 721 | goto set_via_filehandle; |
| 722 | } |
| 723 | |
| 724 | /* |
| 725 | * NT4 apparently returns success on this call, but it doesn't |
| 726 | * really work. |
| 727 | */ |
| 728 | if (!(pTcon->ses->flags & CIFS_SES_NT4)) { |
| 729 | rc = CIFSSMBSetPathInfo(xid, pTcon, full_path, |
| 730 | &info_buf, cifs_sb->local_nls, |
| 731 | cifs_sb->mnt_cifs_flags & |
| 732 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 733 | if (rc == 0) { |
| 734 | cifsInode->cifsAttrs = dosattr; |
| 735 | goto out; |
| 736 | } else if (rc != -EOPNOTSUPP && rc != -EINVAL) |
| 737 | goto out; |
| 738 | } |
| 739 | |
| 740 | cFYI(1, ("calling SetFileInfo since SetPathInfo for " |
| 741 | "times not supported by this server")); |
| 742 | rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, |
| 743 | SYNCHRONIZE | FILE_WRITE_ATTRIBUTES, |
| 744 | CREATE_NOT_DIR, &netfid, &oplock, |
| 745 | NULL, cifs_sb->local_nls, |
| 746 | cifs_sb->mnt_cifs_flags & |
| 747 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 748 | |
| 749 | if (rc != 0) { |
| 750 | if (rc == -EIO) |
| 751 | rc = -EINVAL; |
| 752 | goto out; |
| 753 | } |
| 754 | |
| 755 | netpid = current->tgid; |
| 756 | |
| 757 | set_via_filehandle: |
| 758 | rc = CIFSSMBSetFileInfo(xid, pTcon, &info_buf, netfid, netpid); |
| 759 | if (!rc) |
| 760 | cifsInode->cifsAttrs = dosattr; |
| 761 | |
| 762 | if (open_file == NULL) |
| 763 | CIFSSMBClose(xid, pTcon, netfid); |
| 764 | else |
| 765 | atomic_dec(&open_file->wrtPending); |
| 766 | out: |
| 767 | return rc; |
| 768 | } |
| 769 | |
| 770 | /* |
| 771 | * open the given file (if it isn't already), set the DELETE_ON_CLOSE bit |
| 772 | * and rename it to a random name that hopefully won't conflict with |
| 773 | * anything else. |
| 774 | */ |
| 775 | static int |
| 776 | cifs_rename_pending_delete(char *full_path, struct dentry *dentry, int xid) |
| 777 | { |
| 778 | int oplock = 0; |
| 779 | int rc; |
| 780 | __u16 netfid; |
| 781 | struct inode *inode = dentry->d_inode; |
| 782 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 783 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 784 | struct cifsTconInfo *tcon = cifs_sb->tcon; |
| 785 | __u32 dosattr, origattr; |
| 786 | FILE_BASIC_INFO *info_buf = NULL; |
| 787 | |
| 788 | rc = CIFSSMBOpen(xid, tcon, full_path, FILE_OPEN, |
| 789 | DELETE|FILE_WRITE_ATTRIBUTES, CREATE_NOT_DIR, |
| 790 | &netfid, &oplock, NULL, cifs_sb->local_nls, |
| 791 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 792 | if (rc != 0) |
| 793 | goto out; |
| 794 | |
| 795 | origattr = cifsInode->cifsAttrs; |
| 796 | if (origattr == 0) |
| 797 | origattr |= ATTR_NORMAL; |
| 798 | |
| 799 | dosattr = origattr & ~ATTR_READONLY; |
| 800 | if (dosattr == 0) |
| 801 | dosattr |= ATTR_NORMAL; |
| 802 | dosattr |= ATTR_HIDDEN; |
| 803 | |
| 804 | /* set ATTR_HIDDEN and clear ATTR_READONLY, but only if needed */ |
| 805 | if (dosattr != origattr) { |
| 806 | info_buf = kzalloc(sizeof(*info_buf), GFP_KERNEL); |
| 807 | if (info_buf == NULL) { |
| 808 | rc = -ENOMEM; |
| 809 | goto out_close; |
| 810 | } |
| 811 | info_buf->Attributes = cpu_to_le32(dosattr); |
| 812 | rc = CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, |
| 813 | current->tgid); |
| 814 | /* although we would like to mark the file hidden |
| 815 | if that fails we will still try to rename it */ |
| 816 | if (rc != 0) { |
| 817 | cifsInode->cifsAttrs = dosattr; |
| 818 | else |
| 819 | dosattr = origattr; /* since not able to change them */ |
| 820 | } |
| 821 | |
| 822 | /* rename the file */ |
| 823 | rc = CIFSSMBRenameOpenFile(xid, tcon, netfid, NULL, cifs_sb->local_nls, |
| 824 | cifs_sb->mnt_cifs_flags & |
| 825 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 826 | if (rc != 0) { |
| 827 | rc = -ETXTBSY; |
| 828 | goto undo_setattr; |
| 829 | } |
| 830 | |
| 831 | /* try to set DELETE_ON_CLOSE */ |
| 832 | if (!cifsInode->delete_pending) { |
| 833 | rc = CIFSSMBSetFileDisposition(xid, tcon, true, netfid, |
| 834 | current->tgid); |
| 835 | /* |
| 836 | * some samba versions return -ENOENT when we try to set the |
| 837 | * file disposition here. Likely a samba bug, but work around |
| 838 | * it for now. This means that some cifsXXX files may hang |
| 839 | * around after they shouldn't. |
| 840 | * |
| 841 | * BB: remove this hack after more servers have the fix |
| 842 | */ |
| 843 | if (rc == -ENOENT) |
| 844 | rc = 0; |
| 845 | else if (rc != 0) { |
| 846 | rc = -ETXTBSY; |
| 847 | goto undo_rename; |
| 848 | } |
| 849 | cifsInode->delete_pending = true; |
| 850 | } |
| 851 | |
| 852 | out_close: |
| 853 | CIFSSMBClose(xid, tcon, netfid); |
| 854 | out: |
| 855 | kfree(info_buf); |
| 856 | return rc; |
| 857 | |
| 858 | /* |
| 859 | * reset everything back to the original state. Don't bother |
| 860 | * dealing with errors here since we can't do anything about |
| 861 | * them anyway. |
| 862 | */ |
| 863 | undo_rename: |
| 864 | CIFSSMBRenameOpenFile(xid, tcon, netfid, dentry->d_name.name, |
| 865 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 866 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 867 | undo_setattr: |
| 868 | if (dosattr != origattr) { |
| 869 | info_buf->Attributes = cpu_to_le32(origattr); |
| 870 | if (!CIFSSMBSetFileInfo(xid, tcon, info_buf, netfid, |
| 871 | current->tgid)) |
| 872 | cifsInode->cifsAttrs = origattr; |
| 873 | } |
| 874 | |
| 875 | goto out_close; |
| 876 | } |
| 877 | |
| 878 | int cifs_unlink(struct inode *dir, struct dentry *dentry) |
| 879 | { |
| 880 | int rc = 0; |
| 881 | int xid; |
| 882 | char *full_path = NULL; |
| 883 | struct inode *inode = dentry->d_inode; |
| 884 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 885 | struct super_block *sb = dir->i_sb; |
| 886 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 887 | struct cifsTconInfo *tcon = cifs_sb->tcon; |
| 888 | struct iattr *attrs = NULL; |
| 889 | __u32 dosattr = 0, origattr = 0; |
| 890 | |
| 891 | cFYI(1, ("cifs_unlink, dir=0x%p, dentry=0x%p", dir, dentry)); |
| 892 | |
| 893 | xid = GetXid(); |
| 894 | |
| 895 | /* Unlink can be called from rename so we can not take the |
| 896 | * sb->s_vfs_rename_mutex here */ |
| 897 | full_path = build_path_from_dentry(dentry); |
| 898 | if (full_path == NULL) { |
| 899 | FreeXid(xid); |
| 900 | return -ENOMEM; |
| 901 | } |
| 902 | |
| 903 | if ((tcon->ses->capabilities & CAP_UNIX) && |
| 904 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 905 | le64_to_cpu(tcon->fsUnixInfo.Capability))) { |
| 906 | rc = CIFSPOSIXDelFile(xid, tcon, full_path, |
| 907 | SMB_POSIX_UNLINK_FILE_TARGET, cifs_sb->local_nls, |
| 908 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 909 | cFYI(1, ("posix del rc %d", rc)); |
| 910 | if ((rc == 0) || (rc == -ENOENT)) |
| 911 | goto psx_del_no_retry; |
| 912 | } |
| 913 | |
| 914 | retry_std_delete: |
| 915 | rc = CIFSSMBDelFile(xid, tcon, full_path, cifs_sb->local_nls, |
| 916 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 917 | |
| 918 | psx_del_no_retry: |
| 919 | if (!rc) { |
| 920 | if (inode) |
| 921 | drop_nlink(inode); |
| 922 | } else if (rc == -ENOENT) { |
| 923 | d_drop(dentry); |
| 924 | } else if (rc == -ETXTBSY) { |
| 925 | rc = cifs_rename_pending_delete(full_path, dentry, xid); |
| 926 | if (rc == 0) |
| 927 | drop_nlink(inode); |
| 928 | } else if (rc == -EACCES && dosattr == 0) { |
| 929 | attrs = kzalloc(sizeof(*attrs), GFP_KERNEL); |
| 930 | if (attrs == NULL) { |
| 931 | rc = -ENOMEM; |
| 932 | goto out_reval; |
| 933 | } |
| 934 | |
| 935 | /* try to reset dos attributes */ |
| 936 | origattr = cifsInode->cifsAttrs; |
| 937 | if (origattr == 0) |
| 938 | origattr |= ATTR_NORMAL; |
| 939 | dosattr = origattr & ~ATTR_READONLY; |
| 940 | if (dosattr == 0) |
| 941 | dosattr |= ATTR_NORMAL; |
| 942 | dosattr |= ATTR_HIDDEN; |
| 943 | |
| 944 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
| 945 | if (rc != 0) |
| 946 | goto out_reval; |
| 947 | |
| 948 | goto retry_std_delete; |
| 949 | } |
| 950 | |
| 951 | /* undo the setattr if we errored out and it's needed */ |
| 952 | if (rc != 0 && dosattr != 0) |
| 953 | cifs_set_file_info(inode, attrs, xid, full_path, origattr); |
| 954 | |
| 955 | out_reval: |
| 956 | if (inode) { |
| 957 | cifsInode = CIFS_I(inode); |
| 958 | cifsInode->time = 0; /* will force revalidate to get info |
| 959 | when needed */ |
| 960 | inode->i_ctime = current_fs_time(sb); |
| 961 | } |
| 962 | dir->i_ctime = dir->i_mtime = current_fs_time(sb); |
| 963 | cifsInode = CIFS_I(dir); |
| 964 | CIFS_I(dir)->time = 0; /* force revalidate of dir as well */ |
| 965 | |
| 966 | kfree(full_path); |
| 967 | kfree(attrs); |
| 968 | FreeXid(xid); |
| 969 | return rc; |
| 970 | } |
| 971 | |
| 972 | static void posix_fill_in_inode(struct inode *tmp_inode, |
| 973 | FILE_UNIX_BASIC_INFO *pData, int isNewInode) |
| 974 | { |
| 975 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
| 976 | loff_t local_size; |
| 977 | struct timespec local_mtime; |
| 978 | |
| 979 | cifsInfo->time = jiffies; |
| 980 | atomic_inc(&cifsInfo->inUse); |
| 981 | |
| 982 | /* save mtime and size */ |
| 983 | local_mtime = tmp_inode->i_mtime; |
| 984 | local_size = tmp_inode->i_size; |
| 985 | |
| 986 | cifs_unix_info_to_inode(tmp_inode, pData, 1); |
| 987 | cifs_set_ops(tmp_inode, false); |
| 988 | |
| 989 | if (!S_ISREG(tmp_inode->i_mode)) |
| 990 | return; |
| 991 | |
| 992 | /* |
| 993 | * No sense invalidating pages for new inode |
| 994 | * since we we have not started caching |
| 995 | * readahead file data yet. |
| 996 | */ |
| 997 | if (isNewInode) |
| 998 | return; |
| 999 | |
| 1000 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && |
| 1001 | (local_size == tmp_inode->i_size)) { |
| 1002 | cFYI(1, ("inode exists but unchanged")); |
| 1003 | } else { |
| 1004 | /* file may have changed on server */ |
| 1005 | cFYI(1, ("invalidate inode, readdir detected change")); |
| 1006 | invalidate_remote_inode(tmp_inode); |
| 1007 | } |
| 1008 | } |
| 1009 | |
| 1010 | int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode) |
| 1011 | { |
| 1012 | int rc = 0, tmprc; |
| 1013 | int xid; |
| 1014 | struct cifs_sb_info *cifs_sb; |
| 1015 | struct cifsTconInfo *pTcon; |
| 1016 | char *full_path = NULL; |
| 1017 | struct inode *newinode = NULL; |
| 1018 | |
| 1019 | cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode)); |
| 1020 | |
| 1021 | xid = GetXid(); |
| 1022 | |
| 1023 | cifs_sb = CIFS_SB(inode->i_sb); |
| 1024 | pTcon = cifs_sb->tcon; |
| 1025 | |
| 1026 | full_path = build_path_from_dentry(direntry); |
| 1027 | if (full_path == NULL) { |
| 1028 | FreeXid(xid); |
| 1029 | return -ENOMEM; |
| 1030 | } |
| 1031 | |
| 1032 | if ((pTcon->ses->capabilities & CAP_UNIX) && |
| 1033 | (CIFS_UNIX_POSIX_PATH_OPS_CAP & |
| 1034 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) { |
| 1035 | u32 oplock = 0; |
| 1036 | FILE_UNIX_BASIC_INFO *pInfo = |
| 1037 | kzalloc(sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL); |
| 1038 | if (pInfo == NULL) { |
| 1039 | rc = -ENOMEM; |
| 1040 | goto mkdir_out; |
| 1041 | } |
| 1042 | |
| 1043 | mode &= ~current->fs->umask; |
| 1044 | rc = CIFSPOSIXCreate(xid, pTcon, SMB_O_DIRECTORY | SMB_O_CREAT, |
| 1045 | mode, NULL /* netfid */, pInfo, &oplock, |
| 1046 | full_path, cifs_sb->local_nls, |
| 1047 | cifs_sb->mnt_cifs_flags & |
| 1048 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1049 | if (rc == -EOPNOTSUPP) { |
| 1050 | kfree(pInfo); |
| 1051 | goto mkdir_retry_old; |
| 1052 | } else if (rc) { |
| 1053 | cFYI(1, ("posix mkdir returned 0x%x", rc)); |
| 1054 | d_drop(direntry); |
| 1055 | } else { |
| 1056 | if (pInfo->Type == cpu_to_le32(-1)) { |
| 1057 | /* no return info, go query for it */ |
| 1058 | kfree(pInfo); |
| 1059 | goto mkdir_get_info; |
| 1060 | } |
| 1061 | /*BB check (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID ) to see if need |
| 1062 | to set uid/gid */ |
| 1063 | inc_nlink(inode); |
| 1064 | if (pTcon->nocase) |
| 1065 | direntry->d_op = &cifs_ci_dentry_ops; |
| 1066 | else |
| 1067 | direntry->d_op = &cifs_dentry_ops; |
| 1068 | |
| 1069 | newinode = new_inode(inode->i_sb); |
| 1070 | if (newinode == NULL) { |
| 1071 | kfree(pInfo); |
| 1072 | goto mkdir_get_info; |
| 1073 | } |
| 1074 | |
| 1075 | /* Is an i_ino of zero legal? */ |
| 1076 | /* Are there sanity checks we can use to ensure that |
| 1077 | the server is really filling in that field? */ |
| 1078 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
| 1079 | newinode->i_ino = |
| 1080 | (unsigned long)pInfo->UniqueId; |
| 1081 | } /* note ino incremented to unique num in new_inode */ |
| 1082 | if (inode->i_sb->s_flags & MS_NOATIME) |
| 1083 | newinode->i_flags |= S_NOATIME | S_NOCMTIME; |
| 1084 | newinode->i_nlink = 2; |
| 1085 | |
| 1086 | insert_inode_hash(newinode); |
| 1087 | d_instantiate(direntry, newinode); |
| 1088 | |
| 1089 | /* we already checked in POSIXCreate whether |
| 1090 | frame was long enough */ |
| 1091 | posix_fill_in_inode(direntry->d_inode, |
| 1092 | pInfo, 1 /* NewInode */); |
| 1093 | #ifdef CONFIG_CIFS_DEBUG2 |
| 1094 | cFYI(1, ("instantiated dentry %p %s to inode %p", |
| 1095 | direntry, direntry->d_name.name, newinode)); |
| 1096 | |
| 1097 | if (newinode->i_nlink != 2) |
| 1098 | cFYI(1, ("unexpected number of links %d", |
| 1099 | newinode->i_nlink)); |
| 1100 | #endif |
| 1101 | } |
| 1102 | kfree(pInfo); |
| 1103 | goto mkdir_out; |
| 1104 | } |
| 1105 | mkdir_retry_old: |
| 1106 | /* BB add setting the equivalent of mode via CreateX w/ACLs */ |
| 1107 | rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls, |
| 1108 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1109 | if (rc) { |
| 1110 | cFYI(1, ("cifs_mkdir returned 0x%x", rc)); |
| 1111 | d_drop(direntry); |
| 1112 | } else { |
| 1113 | mkdir_get_info: |
| 1114 | inc_nlink(inode); |
| 1115 | if (pTcon->unix_ext) |
| 1116 | rc = cifs_get_inode_info_unix(&newinode, full_path, |
| 1117 | inode->i_sb, xid); |
| 1118 | else |
| 1119 | rc = cifs_get_inode_info(&newinode, full_path, NULL, |
| 1120 | inode->i_sb, xid, NULL); |
| 1121 | |
| 1122 | if (pTcon->nocase) |
| 1123 | direntry->d_op = &cifs_ci_dentry_ops; |
| 1124 | else |
| 1125 | direntry->d_op = &cifs_dentry_ops; |
| 1126 | d_instantiate(direntry, newinode); |
| 1127 | /* setting nlink not necessary except in cases where we |
| 1128 | * failed to get it from the server or was set bogus */ |
| 1129 | if ((direntry->d_inode) && (direntry->d_inode->i_nlink < 2)) |
| 1130 | direntry->d_inode->i_nlink = 2; |
| 1131 | |
| 1132 | mode &= ~current->fs->umask; |
| 1133 | /* must turn on setgid bit if parent dir has it */ |
| 1134 | if (inode->i_mode & S_ISGID) |
| 1135 | mode |= S_ISGID; |
| 1136 | |
| 1137 | if (pTcon->unix_ext) { |
| 1138 | struct cifs_unix_set_info_args args = { |
| 1139 | .mode = mode, |
| 1140 | .ctime = NO_CHANGE_64, |
| 1141 | .atime = NO_CHANGE_64, |
| 1142 | .mtime = NO_CHANGE_64, |
| 1143 | .device = 0, |
| 1144 | }; |
| 1145 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) { |
| 1146 | args.uid = (__u64)current->fsuid; |
| 1147 | if (inode->i_mode & S_ISGID) |
| 1148 | args.gid = (__u64)inode->i_gid; |
| 1149 | else |
| 1150 | args.gid = (__u64)current->fsgid; |
| 1151 | } else { |
| 1152 | args.uid = NO_CHANGE_64; |
| 1153 | args.gid = NO_CHANGE_64; |
| 1154 | } |
| 1155 | CIFSSMBUnixSetInfo(xid, pTcon, full_path, &args, |
| 1156 | cifs_sb->local_nls, |
| 1157 | cifs_sb->mnt_cifs_flags & |
| 1158 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1159 | } else { |
| 1160 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) && |
| 1161 | (mode & S_IWUGO) == 0) { |
| 1162 | FILE_BASIC_INFO pInfo; |
| 1163 | struct cifsInodeInfo *cifsInode; |
| 1164 | u32 dosattrs; |
| 1165 | |
| 1166 | memset(&pInfo, 0, sizeof(pInfo)); |
| 1167 | cifsInode = CIFS_I(newinode); |
| 1168 | dosattrs = cifsInode->cifsAttrs|ATTR_READONLY; |
| 1169 | pInfo.Attributes = cpu_to_le32(dosattrs); |
| 1170 | tmprc = CIFSSMBSetPathInfo(xid, pTcon, |
| 1171 | full_path, &pInfo, |
| 1172 | cifs_sb->local_nls, |
| 1173 | cifs_sb->mnt_cifs_flags & |
| 1174 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1175 | if (tmprc == 0) |
| 1176 | cifsInode->cifsAttrs = dosattrs; |
| 1177 | } |
| 1178 | if (direntry->d_inode) { |
| 1179 | if (cifs_sb->mnt_cifs_flags & |
| 1180 | CIFS_MOUNT_DYNPERM) |
| 1181 | direntry->d_inode->i_mode = |
| 1182 | (mode | S_IFDIR); |
| 1183 | |
| 1184 | if (cifs_sb->mnt_cifs_flags & |
| 1185 | CIFS_MOUNT_SET_UID) { |
| 1186 | direntry->d_inode->i_uid = |
| 1187 | current->fsuid; |
| 1188 | if (inode->i_mode & S_ISGID) |
| 1189 | direntry->d_inode->i_gid = |
| 1190 | inode->i_gid; |
| 1191 | else |
| 1192 | direntry->d_inode->i_gid = |
| 1193 | current->fsgid; |
| 1194 | } |
| 1195 | } |
| 1196 | } |
| 1197 | } |
| 1198 | mkdir_out: |
| 1199 | kfree(full_path); |
| 1200 | FreeXid(xid); |
| 1201 | return rc; |
| 1202 | } |
| 1203 | |
| 1204 | int cifs_rmdir(struct inode *inode, struct dentry *direntry) |
| 1205 | { |
| 1206 | int rc = 0; |
| 1207 | int xid; |
| 1208 | struct cifs_sb_info *cifs_sb; |
| 1209 | struct cifsTconInfo *pTcon; |
| 1210 | char *full_path = NULL; |
| 1211 | struct cifsInodeInfo *cifsInode; |
| 1212 | |
| 1213 | cFYI(1, ("cifs_rmdir, inode = 0x%p", inode)); |
| 1214 | |
| 1215 | xid = GetXid(); |
| 1216 | |
| 1217 | cifs_sb = CIFS_SB(inode->i_sb); |
| 1218 | pTcon = cifs_sb->tcon; |
| 1219 | |
| 1220 | full_path = build_path_from_dentry(direntry); |
| 1221 | if (full_path == NULL) { |
| 1222 | FreeXid(xid); |
| 1223 | return -ENOMEM; |
| 1224 | } |
| 1225 | |
| 1226 | rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls, |
| 1227 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1228 | |
| 1229 | if (!rc) { |
| 1230 | drop_nlink(inode); |
| 1231 | spin_lock(&direntry->d_inode->i_lock); |
| 1232 | i_size_write(direntry->d_inode, 0); |
| 1233 | clear_nlink(direntry->d_inode); |
| 1234 | spin_unlock(&direntry->d_inode->i_lock); |
| 1235 | } |
| 1236 | |
| 1237 | cifsInode = CIFS_I(direntry->d_inode); |
| 1238 | cifsInode->time = 0; /* force revalidate to go get info when |
| 1239 | needed */ |
| 1240 | direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime = |
| 1241 | current_fs_time(inode->i_sb); |
| 1242 | |
| 1243 | kfree(full_path); |
| 1244 | FreeXid(xid); |
| 1245 | return rc; |
| 1246 | } |
| 1247 | |
| 1248 | static int |
| 1249 | cifs_do_rename(int xid, struct dentry *from_dentry, const char *fromPath, |
| 1250 | struct dentry *to_dentry, const char *toPath) |
| 1251 | { |
| 1252 | struct cifs_sb_info *cifs_sb = CIFS_SB(from_dentry->d_sb); |
| 1253 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 1254 | __u16 srcfid; |
| 1255 | int oplock, rc; |
| 1256 | |
| 1257 | /* try path-based rename first */ |
| 1258 | rc = CIFSSMBRename(xid, pTcon, fromPath, toPath, cifs_sb->local_nls, |
| 1259 | cifs_sb->mnt_cifs_flags & |
| 1260 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1261 | |
| 1262 | /* |
| 1263 | * don't bother with rename by filehandle unless file is busy and |
| 1264 | * source Note that cross directory moves do not work with |
| 1265 | * rename by filehandle to various Windows servers. |
| 1266 | */ |
| 1267 | if (rc == 0 || rc != -ETXTBSY) |
| 1268 | return rc; |
| 1269 | |
| 1270 | /* open the file to be renamed -- we need DELETE perms */ |
| 1271 | rc = CIFSSMBOpen(xid, pTcon, fromPath, FILE_OPEN, DELETE, |
| 1272 | CREATE_NOT_DIR, &srcfid, &oplock, NULL, |
| 1273 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 1274 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1275 | |
| 1276 | if (rc == 0) { |
| 1277 | rc = CIFSSMBRenameOpenFile(xid, pTcon, srcfid, |
| 1278 | (const char *) to_dentry->d_name.name, |
| 1279 | cifs_sb->local_nls, cifs_sb->mnt_cifs_flags & |
| 1280 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1281 | |
| 1282 | CIFSSMBClose(xid, pTcon, srcfid); |
| 1283 | } |
| 1284 | |
| 1285 | return rc; |
| 1286 | } |
| 1287 | |
| 1288 | int cifs_rename(struct inode *source_inode, struct dentry *source_direntry, |
| 1289 | struct inode *target_inode, struct dentry *target_direntry) |
| 1290 | { |
| 1291 | char *fromName = NULL; |
| 1292 | char *toName = NULL; |
| 1293 | struct cifs_sb_info *cifs_sb_source; |
| 1294 | struct cifs_sb_info *cifs_sb_target; |
| 1295 | struct cifsTconInfo *pTcon; |
| 1296 | FILE_UNIX_BASIC_INFO *info_buf_source = NULL; |
| 1297 | FILE_UNIX_BASIC_INFO *info_buf_target; |
| 1298 | int xid; |
| 1299 | int rc; |
| 1300 | |
| 1301 | cifs_sb_target = CIFS_SB(target_inode->i_sb); |
| 1302 | cifs_sb_source = CIFS_SB(source_inode->i_sb); |
| 1303 | pTcon = cifs_sb_source->tcon; |
| 1304 | |
| 1305 | xid = GetXid(); |
| 1306 | |
| 1307 | /* |
| 1308 | * BB: this might be allowed if same server, but different share. |
| 1309 | * Consider adding support for this |
| 1310 | */ |
| 1311 | if (pTcon != cifs_sb_target->tcon) { |
| 1312 | rc = -EXDEV; |
| 1313 | goto cifs_rename_exit; |
| 1314 | } |
| 1315 | |
| 1316 | /* |
| 1317 | * we already have the rename sem so we do not need to |
| 1318 | * grab it again here to protect the path integrity |
| 1319 | */ |
| 1320 | fromName = build_path_from_dentry(source_direntry); |
| 1321 | if (fromName == NULL) { |
| 1322 | rc = -ENOMEM; |
| 1323 | goto cifs_rename_exit; |
| 1324 | } |
| 1325 | |
| 1326 | toName = build_path_from_dentry(target_direntry); |
| 1327 | if (toName == NULL) { |
| 1328 | rc = -ENOMEM; |
| 1329 | goto cifs_rename_exit; |
| 1330 | } |
| 1331 | |
| 1332 | rc = cifs_do_rename(xid, source_direntry, fromName, |
| 1333 | target_direntry, toName); |
| 1334 | |
| 1335 | if (rc == -EEXIST) { |
| 1336 | if (pTcon->unix_ext) { |
| 1337 | /* |
| 1338 | * Are src and dst hardlinks of same inode? We can |
| 1339 | * only tell with unix extensions enabled |
| 1340 | */ |
| 1341 | info_buf_source = |
| 1342 | kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), |
| 1343 | GFP_KERNEL); |
| 1344 | if (info_buf_source == NULL) |
| 1345 | goto unlink_target; |
| 1346 | |
| 1347 | info_buf_target = info_buf_source + 1; |
| 1348 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName, |
| 1349 | info_buf_source, |
| 1350 | cifs_sb_source->local_nls, |
| 1351 | cifs_sb_source->mnt_cifs_flags & |
| 1352 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1353 | if (rc != 0) |
| 1354 | goto unlink_target; |
| 1355 | |
| 1356 | rc = CIFSSMBUnixQPathInfo(xid, pTcon, |
| 1357 | toName, info_buf_target, |
| 1358 | cifs_sb_target->local_nls, |
| 1359 | /* remap based on source sb */ |
| 1360 | cifs_sb_source->mnt_cifs_flags & |
| 1361 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1362 | |
| 1363 | if (rc == 0 && (info_buf_source->UniqueId == |
| 1364 | info_buf_target->UniqueId)) |
| 1365 | /* same file, POSIX says that this is a noop */ |
| 1366 | goto cifs_rename_exit; |
| 1367 | } /* else ... BB we could add the same check for Windows by |
| 1368 | checking the UniqueId via FILE_INTERNAL_INFO */ |
| 1369 | unlink_target: |
| 1370 | /* |
| 1371 | * we either can not tell the files are hardlinked (as with |
| 1372 | * Windows servers) or files are not hardlinked. Delete the |
| 1373 | * target manually before renaming to follow POSIX rather than |
| 1374 | * Windows semantics |
| 1375 | */ |
| 1376 | cifs_unlink(target_inode, target_direntry); |
| 1377 | rc = cifs_do_rename(xid, source_direntry, fromName, |
| 1378 | target_direntry, toName); |
| 1379 | } |
| 1380 | |
| 1381 | cifs_rename_exit: |
| 1382 | kfree(info_buf_source); |
| 1383 | kfree(fromName); |
| 1384 | kfree(toName); |
| 1385 | FreeXid(xid); |
| 1386 | return rc; |
| 1387 | } |
| 1388 | |
| 1389 | int cifs_revalidate(struct dentry *direntry) |
| 1390 | { |
| 1391 | int xid; |
| 1392 | int rc = 0, wbrc = 0; |
| 1393 | char *full_path; |
| 1394 | struct cifs_sb_info *cifs_sb; |
| 1395 | struct cifsInodeInfo *cifsInode; |
| 1396 | loff_t local_size; |
| 1397 | struct timespec local_mtime; |
| 1398 | bool invalidate_inode = false; |
| 1399 | |
| 1400 | if (direntry->d_inode == NULL) |
| 1401 | return -ENOENT; |
| 1402 | |
| 1403 | cifsInode = CIFS_I(direntry->d_inode); |
| 1404 | |
| 1405 | if (cifsInode == NULL) |
| 1406 | return -ENOENT; |
| 1407 | |
| 1408 | /* no sense revalidating inode info on file that no one can write */ |
| 1409 | if (CIFS_I(direntry->d_inode)->clientCanCacheRead) |
| 1410 | return rc; |
| 1411 | |
| 1412 | xid = GetXid(); |
| 1413 | |
| 1414 | cifs_sb = CIFS_SB(direntry->d_sb); |
| 1415 | |
| 1416 | /* can not safely grab the rename sem here if rename calls revalidate |
| 1417 | since that would deadlock */ |
| 1418 | full_path = build_path_from_dentry(direntry); |
| 1419 | if (full_path == NULL) { |
| 1420 | FreeXid(xid); |
| 1421 | return -ENOMEM; |
| 1422 | } |
| 1423 | cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld " |
| 1424 | "jiffies %ld", full_path, direntry->d_inode, |
| 1425 | direntry->d_inode->i_count.counter, direntry, |
| 1426 | direntry->d_time, jiffies)); |
| 1427 | |
| 1428 | if (cifsInode->time == 0) { |
| 1429 | /* was set to zero previously to force revalidate */ |
| 1430 | } else if (time_before(jiffies, cifsInode->time + HZ) && |
| 1431 | lookupCacheEnabled) { |
| 1432 | if ((S_ISREG(direntry->d_inode->i_mode) == 0) || |
| 1433 | (direntry->d_inode->i_nlink == 1)) { |
| 1434 | kfree(full_path); |
| 1435 | FreeXid(xid); |
| 1436 | return rc; |
| 1437 | } else { |
| 1438 | cFYI(1, ("Have to revalidate file due to hardlinks")); |
| 1439 | } |
| 1440 | } |
| 1441 | |
| 1442 | /* save mtime and size */ |
| 1443 | local_mtime = direntry->d_inode->i_mtime; |
| 1444 | local_size = direntry->d_inode->i_size; |
| 1445 | |
| 1446 | if (cifs_sb->tcon->unix_ext) { |
| 1447 | rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path, |
| 1448 | direntry->d_sb, xid); |
| 1449 | if (rc) { |
| 1450 | cFYI(1, ("error on getting revalidate info %d", rc)); |
| 1451 | /* if (rc != -ENOENT) |
| 1452 | rc = 0; */ /* BB should we cache info on |
| 1453 | certain errors? */ |
| 1454 | } |
| 1455 | } else { |
| 1456 | rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL, |
| 1457 | direntry->d_sb, xid, NULL); |
| 1458 | if (rc) { |
| 1459 | cFYI(1, ("error on getting revalidate info %d", rc)); |
| 1460 | /* if (rc != -ENOENT) |
| 1461 | rc = 0; */ /* BB should we cache info on |
| 1462 | certain errors? */ |
| 1463 | } |
| 1464 | } |
| 1465 | /* should we remap certain errors, access denied?, to zero */ |
| 1466 | |
| 1467 | /* if not oplocked, we invalidate inode pages if mtime or file size |
| 1468 | had changed on server */ |
| 1469 | |
| 1470 | if (timespec_equal(&local_mtime, &direntry->d_inode->i_mtime) && |
| 1471 | (local_size == direntry->d_inode->i_size)) { |
| 1472 | cFYI(1, ("cifs_revalidate - inode unchanged")); |
| 1473 | } else { |
| 1474 | /* file may have changed on server */ |
| 1475 | if (cifsInode->clientCanCacheRead) { |
| 1476 | /* no need to invalidate inode pages since we were the |
| 1477 | only ones who could have modified the file and the |
| 1478 | server copy is staler than ours */ |
| 1479 | } else { |
| 1480 | invalidate_inode = true; |
| 1481 | } |
| 1482 | } |
| 1483 | |
| 1484 | /* can not grab this sem since kernel filesys locking documentation |
| 1485 | indicates i_mutex may be taken by the kernel on lookup and rename |
| 1486 | which could deadlock if we grab the i_mutex here as well */ |
| 1487 | /* mutex_lock(&direntry->d_inode->i_mutex);*/ |
| 1488 | /* need to write out dirty pages here */ |
| 1489 | if (direntry->d_inode->i_mapping) { |
| 1490 | /* do we need to lock inode until after invalidate completes |
| 1491 | below? */ |
| 1492 | wbrc = filemap_fdatawrite(direntry->d_inode->i_mapping); |
| 1493 | if (wbrc) |
| 1494 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; |
| 1495 | } |
| 1496 | if (invalidate_inode) { |
| 1497 | /* shrink_dcache not necessary now that cifs dentry ops |
| 1498 | are exported for negative dentries */ |
| 1499 | /* if (S_ISDIR(direntry->d_inode->i_mode)) |
| 1500 | shrink_dcache_parent(direntry); */ |
| 1501 | if (S_ISREG(direntry->d_inode->i_mode)) { |
| 1502 | if (direntry->d_inode->i_mapping) { |
| 1503 | wbrc = filemap_fdatawait(direntry->d_inode->i_mapping); |
| 1504 | if (wbrc) |
| 1505 | CIFS_I(direntry->d_inode)->write_behind_rc = wbrc; |
| 1506 | } |
| 1507 | /* may eventually have to do this for open files too */ |
| 1508 | if (list_empty(&(cifsInode->openFileList))) { |
| 1509 | /* changed on server - flush read ahead pages */ |
| 1510 | cFYI(1, ("Invalidating read ahead data on " |
| 1511 | "closed file")); |
| 1512 | invalidate_remote_inode(direntry->d_inode); |
| 1513 | } |
| 1514 | } |
| 1515 | } |
| 1516 | /* mutex_unlock(&direntry->d_inode->i_mutex); */ |
| 1517 | |
| 1518 | kfree(full_path); |
| 1519 | FreeXid(xid); |
| 1520 | return rc; |
| 1521 | } |
| 1522 | |
| 1523 | int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry, |
| 1524 | struct kstat *stat) |
| 1525 | { |
| 1526 | int err = cifs_revalidate(dentry); |
| 1527 | if (!err) { |
| 1528 | generic_fillattr(dentry->d_inode, stat); |
| 1529 | stat->blksize = CIFS_MAX_MSGSIZE; |
| 1530 | } |
| 1531 | return err; |
| 1532 | } |
| 1533 | |
| 1534 | static int cifs_truncate_page(struct address_space *mapping, loff_t from) |
| 1535 | { |
| 1536 | pgoff_t index = from >> PAGE_CACHE_SHIFT; |
| 1537 | unsigned offset = from & (PAGE_CACHE_SIZE - 1); |
| 1538 | struct page *page; |
| 1539 | int rc = 0; |
| 1540 | |
| 1541 | page = grab_cache_page(mapping, index); |
| 1542 | if (!page) |
| 1543 | return -ENOMEM; |
| 1544 | |
| 1545 | zero_user_segment(page, offset, PAGE_CACHE_SIZE); |
| 1546 | unlock_page(page); |
| 1547 | page_cache_release(page); |
| 1548 | return rc; |
| 1549 | } |
| 1550 | |
| 1551 | static int cifs_vmtruncate(struct inode *inode, loff_t offset) |
| 1552 | { |
| 1553 | struct address_space *mapping = inode->i_mapping; |
| 1554 | unsigned long limit; |
| 1555 | |
| 1556 | spin_lock(&inode->i_lock); |
| 1557 | if (inode->i_size < offset) |
| 1558 | goto do_expand; |
| 1559 | /* |
| 1560 | * truncation of in-use swapfiles is disallowed - it would cause |
| 1561 | * subsequent swapout to scribble on the now-freed blocks. |
| 1562 | */ |
| 1563 | if (IS_SWAPFILE(inode)) { |
| 1564 | spin_unlock(&inode->i_lock); |
| 1565 | goto out_busy; |
| 1566 | } |
| 1567 | i_size_write(inode, offset); |
| 1568 | spin_unlock(&inode->i_lock); |
| 1569 | /* |
| 1570 | * unmap_mapping_range is called twice, first simply for efficiency |
| 1571 | * so that truncate_inode_pages does fewer single-page unmaps. However |
| 1572 | * after this first call, and before truncate_inode_pages finishes, |
| 1573 | * it is possible for private pages to be COWed, which remain after |
| 1574 | * truncate_inode_pages finishes, hence the second unmap_mapping_range |
| 1575 | * call must be made for correctness. |
| 1576 | */ |
| 1577 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| 1578 | truncate_inode_pages(mapping, offset); |
| 1579 | unmap_mapping_range(mapping, offset + PAGE_SIZE - 1, 0, 1); |
| 1580 | goto out_truncate; |
| 1581 | |
| 1582 | do_expand: |
| 1583 | limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur; |
| 1584 | if (limit != RLIM_INFINITY && offset > limit) { |
| 1585 | spin_unlock(&inode->i_lock); |
| 1586 | goto out_sig; |
| 1587 | } |
| 1588 | if (offset > inode->i_sb->s_maxbytes) { |
| 1589 | spin_unlock(&inode->i_lock); |
| 1590 | goto out_big; |
| 1591 | } |
| 1592 | i_size_write(inode, offset); |
| 1593 | spin_unlock(&inode->i_lock); |
| 1594 | out_truncate: |
| 1595 | if (inode->i_op && inode->i_op->truncate) |
| 1596 | inode->i_op->truncate(inode); |
| 1597 | return 0; |
| 1598 | out_sig: |
| 1599 | send_sig(SIGXFSZ, current, 0); |
| 1600 | out_big: |
| 1601 | return -EFBIG; |
| 1602 | out_busy: |
| 1603 | return -ETXTBSY; |
| 1604 | } |
| 1605 | |
| 1606 | static int |
| 1607 | cifs_set_file_size(struct inode *inode, struct iattr *attrs, |
| 1608 | int xid, char *full_path) |
| 1609 | { |
| 1610 | int rc; |
| 1611 | struct cifsFileInfo *open_file; |
| 1612 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 1613 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 1614 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 1615 | |
| 1616 | /* |
| 1617 | * To avoid spurious oplock breaks from server, in the case of |
| 1618 | * inodes that we already have open, avoid doing path based |
| 1619 | * setting of file size if we can do it by handle. |
| 1620 | * This keeps our caching token (oplock) and avoids timeouts |
| 1621 | * when the local oplock break takes longer to flush |
| 1622 | * writebehind data than the SMB timeout for the SetPathInfo |
| 1623 | * request would allow |
| 1624 | */ |
| 1625 | open_file = find_writable_file(cifsInode); |
| 1626 | if (open_file) { |
| 1627 | __u16 nfid = open_file->netfid; |
| 1628 | __u32 npid = open_file->pid; |
| 1629 | rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size, nfid, |
| 1630 | npid, false); |
| 1631 | atomic_dec(&open_file->wrtPending); |
| 1632 | cFYI(1, ("SetFSize for attrs rc = %d", rc)); |
| 1633 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
| 1634 | unsigned int bytes_written; |
| 1635 | rc = CIFSSMBWrite(xid, pTcon, nfid, 0, attrs->ia_size, |
| 1636 | &bytes_written, NULL, NULL, 1); |
| 1637 | cFYI(1, ("Wrt seteof rc %d", rc)); |
| 1638 | } |
| 1639 | } else |
| 1640 | rc = -EINVAL; |
| 1641 | |
| 1642 | if (rc != 0) { |
| 1643 | /* Set file size by pathname rather than by handle |
| 1644 | either because no valid, writeable file handle for |
| 1645 | it was found or because there was an error setting |
| 1646 | it by handle */ |
| 1647 | rc = CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, |
| 1648 | false, cifs_sb->local_nls, |
| 1649 | cifs_sb->mnt_cifs_flags & |
| 1650 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1651 | cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc)); |
| 1652 | if ((rc == -EINVAL) || (rc == -EOPNOTSUPP)) { |
| 1653 | __u16 netfid; |
| 1654 | int oplock = 0; |
| 1655 | |
| 1656 | rc = SMBLegacyOpen(xid, pTcon, full_path, |
| 1657 | FILE_OPEN, GENERIC_WRITE, |
| 1658 | CREATE_NOT_DIR, &netfid, &oplock, NULL, |
| 1659 | cifs_sb->local_nls, |
| 1660 | cifs_sb->mnt_cifs_flags & |
| 1661 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1662 | if (rc == 0) { |
| 1663 | unsigned int bytes_written; |
| 1664 | rc = CIFSSMBWrite(xid, pTcon, netfid, 0, |
| 1665 | attrs->ia_size, |
| 1666 | &bytes_written, NULL, |
| 1667 | NULL, 1); |
| 1668 | cFYI(1, ("wrt seteof rc %d", rc)); |
| 1669 | CIFSSMBClose(xid, pTcon, netfid); |
| 1670 | } |
| 1671 | } |
| 1672 | } |
| 1673 | |
| 1674 | if (rc == 0) { |
| 1675 | rc = cifs_vmtruncate(inode, attrs->ia_size); |
| 1676 | cifs_truncate_page(inode->i_mapping, inode->i_size); |
| 1677 | } |
| 1678 | |
| 1679 | return rc; |
| 1680 | } |
| 1681 | |
| 1682 | static int |
| 1683 | cifs_setattr_unix(struct dentry *direntry, struct iattr *attrs) |
| 1684 | { |
| 1685 | int rc; |
| 1686 | int xid; |
| 1687 | char *full_path = NULL; |
| 1688 | struct inode *inode = direntry->d_inode; |
| 1689 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 1690 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 1691 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 1692 | struct cifs_unix_set_info_args *args = NULL; |
| 1693 | |
| 1694 | cFYI(1, ("setattr_unix on file %s attrs->ia_valid=0x%x", |
| 1695 | direntry->d_name.name, attrs->ia_valid)); |
| 1696 | |
| 1697 | xid = GetXid(); |
| 1698 | |
| 1699 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
| 1700 | /* check if we have permission to change attrs */ |
| 1701 | rc = inode_change_ok(inode, attrs); |
| 1702 | if (rc < 0) |
| 1703 | goto out; |
| 1704 | else |
| 1705 | rc = 0; |
| 1706 | } |
| 1707 | |
| 1708 | full_path = build_path_from_dentry(direntry); |
| 1709 | if (full_path == NULL) { |
| 1710 | rc = -ENOMEM; |
| 1711 | goto out; |
| 1712 | } |
| 1713 | |
| 1714 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
| 1715 | /* |
| 1716 | Flush data before changing file size or changing the last |
| 1717 | write time of the file on the server. If the |
| 1718 | flush returns error, store it to report later and continue. |
| 1719 | BB: This should be smarter. Why bother flushing pages that |
| 1720 | will be truncated anyway? Also, should we error out here if |
| 1721 | the flush returns error? |
| 1722 | */ |
| 1723 | rc = filemap_write_and_wait(inode->i_mapping); |
| 1724 | if (rc != 0) { |
| 1725 | cifsInode->write_behind_rc = rc; |
| 1726 | rc = 0; |
| 1727 | } |
| 1728 | } |
| 1729 | |
| 1730 | if (attrs->ia_valid & ATTR_SIZE) { |
| 1731 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
| 1732 | if (rc != 0) |
| 1733 | goto out; |
| 1734 | } |
| 1735 | |
| 1736 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 1737 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
| 1738 | attrs->ia_valid &= ~ATTR_MODE; |
| 1739 | |
| 1740 | args = kmalloc(sizeof(*args), GFP_KERNEL); |
| 1741 | if (args == NULL) { |
| 1742 | rc = -ENOMEM; |
| 1743 | goto out; |
| 1744 | } |
| 1745 | |
| 1746 | /* set up the struct */ |
| 1747 | if (attrs->ia_valid & ATTR_MODE) |
| 1748 | args->mode = attrs->ia_mode; |
| 1749 | else |
| 1750 | args->mode = NO_CHANGE_64; |
| 1751 | |
| 1752 | if (attrs->ia_valid & ATTR_UID) |
| 1753 | args->uid = attrs->ia_uid; |
| 1754 | else |
| 1755 | args->uid = NO_CHANGE_64; |
| 1756 | |
| 1757 | if (attrs->ia_valid & ATTR_GID) |
| 1758 | args->gid = attrs->ia_gid; |
| 1759 | else |
| 1760 | args->gid = NO_CHANGE_64; |
| 1761 | |
| 1762 | if (attrs->ia_valid & ATTR_ATIME) |
| 1763 | args->atime = cifs_UnixTimeToNT(attrs->ia_atime); |
| 1764 | else |
| 1765 | args->atime = NO_CHANGE_64; |
| 1766 | |
| 1767 | if (attrs->ia_valid & ATTR_MTIME) |
| 1768 | args->mtime = cifs_UnixTimeToNT(attrs->ia_mtime); |
| 1769 | else |
| 1770 | args->mtime = NO_CHANGE_64; |
| 1771 | |
| 1772 | if (attrs->ia_valid & ATTR_CTIME) |
| 1773 | args->ctime = cifs_UnixTimeToNT(attrs->ia_ctime); |
| 1774 | else |
| 1775 | args->ctime = NO_CHANGE_64; |
| 1776 | |
| 1777 | args->device = 0; |
| 1778 | rc = CIFSSMBUnixSetInfo(xid, pTcon, full_path, args, |
| 1779 | cifs_sb->local_nls, |
| 1780 | cifs_sb->mnt_cifs_flags & |
| 1781 | CIFS_MOUNT_MAP_SPECIAL_CHR); |
| 1782 | |
| 1783 | if (!rc) |
| 1784 | rc = inode_setattr(inode, attrs); |
| 1785 | out: |
| 1786 | kfree(args); |
| 1787 | kfree(full_path); |
| 1788 | FreeXid(xid); |
| 1789 | return rc; |
| 1790 | } |
| 1791 | |
| 1792 | static int |
| 1793 | cifs_setattr_nounix(struct dentry *direntry, struct iattr *attrs) |
| 1794 | { |
| 1795 | int xid; |
| 1796 | struct inode *inode = direntry->d_inode; |
| 1797 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 1798 | struct cifsInodeInfo *cifsInode = CIFS_I(inode); |
| 1799 | char *full_path = NULL; |
| 1800 | int rc = -EACCES; |
| 1801 | __u32 dosattr = 0; |
| 1802 | __u64 mode = NO_CHANGE_64; |
| 1803 | |
| 1804 | xid = GetXid(); |
| 1805 | |
| 1806 | cFYI(1, ("setattr on file %s attrs->iavalid 0x%x", |
| 1807 | direntry->d_name.name, attrs->ia_valid)); |
| 1808 | |
| 1809 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) { |
| 1810 | /* check if we have permission to change attrs */ |
| 1811 | rc = inode_change_ok(inode, attrs); |
| 1812 | if (rc < 0) { |
| 1813 | FreeXid(xid); |
| 1814 | return rc; |
| 1815 | } else |
| 1816 | rc = 0; |
| 1817 | } |
| 1818 | |
| 1819 | full_path = build_path_from_dentry(direntry); |
| 1820 | if (full_path == NULL) { |
| 1821 | FreeXid(xid); |
| 1822 | return -ENOMEM; |
| 1823 | } |
| 1824 | |
| 1825 | if ((attrs->ia_valid & ATTR_MTIME) || (attrs->ia_valid & ATTR_SIZE)) { |
| 1826 | /* |
| 1827 | Flush data before changing file size or changing the last |
| 1828 | write time of the file on the server. If the |
| 1829 | flush returns error, store it to report later and continue. |
| 1830 | BB: This should be smarter. Why bother flushing pages that |
| 1831 | will be truncated anyway? Also, should we error out here if |
| 1832 | the flush returns error? |
| 1833 | */ |
| 1834 | rc = filemap_write_and_wait(inode->i_mapping); |
| 1835 | if (rc != 0) { |
| 1836 | cifsInode->write_behind_rc = rc; |
| 1837 | rc = 0; |
| 1838 | } |
| 1839 | } |
| 1840 | |
| 1841 | if (attrs->ia_valid & ATTR_SIZE) { |
| 1842 | rc = cifs_set_file_size(inode, attrs, xid, full_path); |
| 1843 | if (rc != 0) |
| 1844 | goto cifs_setattr_exit; |
| 1845 | } |
| 1846 | |
| 1847 | /* |
| 1848 | * Without unix extensions we can't send ownership changes to the |
| 1849 | * server, so silently ignore them. This is consistent with how |
| 1850 | * local DOS/Windows filesystems behave (VFAT, NTFS, etc). With |
| 1851 | * CIFSACL support + proper Windows to Unix idmapping, we may be |
| 1852 | * able to support this in the future. |
| 1853 | */ |
| 1854 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID)) |
| 1855 | attrs->ia_valid &= ~(ATTR_UID | ATTR_GID); |
| 1856 | |
| 1857 | /* skip mode change if it's just for clearing setuid/setgid */ |
| 1858 | if (attrs->ia_valid & (ATTR_KILL_SUID|ATTR_KILL_SGID)) |
| 1859 | attrs->ia_valid &= ~ATTR_MODE; |
| 1860 | |
| 1861 | if (attrs->ia_valid & ATTR_MODE) { |
| 1862 | cFYI(1, ("Mode changed to 0%o", attrs->ia_mode)); |
| 1863 | mode = attrs->ia_mode; |
| 1864 | } |
| 1865 | |
| 1866 | if (attrs->ia_valid & ATTR_MODE) { |
| 1867 | rc = 0; |
| 1868 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 1869 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
| 1870 | rc = mode_to_acl(inode, full_path, mode); |
| 1871 | else |
| 1872 | #endif |
| 1873 | if (((mode & S_IWUGO) == 0) && |
| 1874 | (cifsInode->cifsAttrs & ATTR_READONLY) == 0) { |
| 1875 | |
| 1876 | dosattr = cifsInode->cifsAttrs | ATTR_READONLY; |
| 1877 | |
| 1878 | /* fix up mode if we're not using dynperm */ |
| 1879 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0) |
| 1880 | attrs->ia_mode = inode->i_mode & ~S_IWUGO; |
| 1881 | } else if ((mode & S_IWUGO) && |
| 1882 | (cifsInode->cifsAttrs & ATTR_READONLY)) { |
| 1883 | |
| 1884 | dosattr = cifsInode->cifsAttrs & ~ATTR_READONLY; |
| 1885 | /* Attributes of 0 are ignored */ |
| 1886 | if (dosattr == 0) |
| 1887 | dosattr |= ATTR_NORMAL; |
| 1888 | |
| 1889 | /* reset local inode permissions to normal */ |
| 1890 | if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
| 1891 | attrs->ia_mode &= ~(S_IALLUGO); |
| 1892 | if (S_ISDIR(inode->i_mode)) |
| 1893 | attrs->ia_mode |= |
| 1894 | cifs_sb->mnt_dir_mode; |
| 1895 | else |
| 1896 | attrs->ia_mode |= |
| 1897 | cifs_sb->mnt_file_mode; |
| 1898 | } |
| 1899 | } else if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM)) { |
| 1900 | /* ignore mode change - ATTR_READONLY hasn't changed */ |
| 1901 | attrs->ia_valid &= ~ATTR_MODE; |
| 1902 | } |
| 1903 | } |
| 1904 | |
| 1905 | if (attrs->ia_valid & (ATTR_MTIME|ATTR_ATIME|ATTR_CTIME) || |
| 1906 | ((attrs->ia_valid & ATTR_MODE) && dosattr)) { |
| 1907 | rc = cifs_set_file_info(inode, attrs, xid, full_path, dosattr); |
| 1908 | /* BB: check for rc = -EOPNOTSUPP and switch to legacy mode */ |
| 1909 | |
| 1910 | /* Even if error on time set, no sense failing the call if |
| 1911 | the server would set the time to a reasonable value anyway, |
| 1912 | and this check ensures that we are not being called from |
| 1913 | sys_utimes in which case we ought to fail the call back to |
| 1914 | the user when the server rejects the call */ |
| 1915 | if ((rc) && (attrs->ia_valid & |
| 1916 | (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE))) |
| 1917 | rc = 0; |
| 1918 | } |
| 1919 | |
| 1920 | /* do not need local check to inode_check_ok since the server does |
| 1921 | that */ |
| 1922 | if (!rc) |
| 1923 | rc = inode_setattr(inode, attrs); |
| 1924 | cifs_setattr_exit: |
| 1925 | kfree(full_path); |
| 1926 | FreeXid(xid); |
| 1927 | return rc; |
| 1928 | } |
| 1929 | |
| 1930 | int |
| 1931 | cifs_setattr(struct dentry *direntry, struct iattr *attrs) |
| 1932 | { |
| 1933 | struct inode *inode = direntry->d_inode; |
| 1934 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); |
| 1935 | struct cifsTconInfo *pTcon = cifs_sb->tcon; |
| 1936 | |
| 1937 | if (pTcon->unix_ext) |
| 1938 | return cifs_setattr_unix(direntry, attrs); |
| 1939 | |
| 1940 | return cifs_setattr_nounix(direntry, attrs); |
| 1941 | |
| 1942 | /* BB: add cifs_setattr_legacy for really old servers */ |
| 1943 | } |
| 1944 | |
| 1945 | #if 0 |
| 1946 | void cifs_delete_inode(struct inode *inode) |
| 1947 | { |
| 1948 | cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode)); |
| 1949 | /* may have to add back in if and when safe distributed caching of |
| 1950 | directories added e.g. via FindNotify */ |
| 1951 | } |
| 1952 | #endif |