4 * Copyright (C) International Business Machines Corp., 2002,2005
5 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
22 #include <linux/buffer_head.h>
23 #include <linux/stat.h>
24 #include <linux/pagemap.h>
25 #include <asm/div64.h>
29 #include "cifsproto.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
33 int cifs_get_inode_info_unix(struct inode **pinode,
34 const unsigned char *search_path, struct super_block *sb, int xid)
37 FILE_UNIX_BASIC_INFO findData;
38 struct cifsTconInfo *pTcon;
40 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
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,
54 kmalloc(strnlen(pTcon->treeName,
56 strnlen(search_path, MAX_PATHCONF) + 1,
58 if (tmp_path == NULL) {
61 /* have to skip first of the double backslash of
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,
68 cifs_sb->mnt_cifs_flags &
69 CIFS_MOUNT_MAP_SPECIAL_CHR);
72 /* BB fix up inode etc. */
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);
83 if (*pinode == NULL) {
84 *pinode = new_inode(sb);
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) {
92 (unsigned long)findData.UniqueId;
93 } /* note ino incremented to unique num in new_inode */
94 insert_inode_hash(*pinode);
98 cifsInfo = CIFS_I(inode);
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);
107 cifs_NTtimeToUnix(le64_to_cpu(findData.LastAccessTime));
109 cifs_NTtimeToUnix(le64_to_cpu
110 (findData.LastModificationTime));
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;
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));
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);
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 */
148 i_size_write(inode, end_of_file);
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;*/
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 */
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;
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)
175 &cifs_file_direct_nobrl_ops;
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;
183 /* check if server can support readpages */
184 if(pTcon->ses->server->maxBuf <
185 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
186 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
188 inode->i_data.a_ops = &cifs_addr_ops;
189 } else if (S_ISDIR(inode->i_mode)) {
190 cFYI(1, ("Directory inode"));
191 inode->i_op = &cifs_dir_inode_ops;
192 inode->i_fop = &cifs_dir_ops;
193 } else if (S_ISLNK(inode->i_mode)) {
194 cFYI(1, ("Symbolic Link inode"));
195 inode->i_op = &cifs_symlink_inode_ops;
196 /* tmp_inode->i_fop = */ /* do not need to set to anything */
198 cFYI(1, ("Init special inode"));
199 init_special_inode(inode, inode->i_mode,
206 static int decode_sfu_inode(struct inode * inode, __u64 size,
207 const unsigned char *path,
208 struct cifs_sb_info *cifs_sb, int xid)
213 struct cifsTconInfo *pTcon = cifs_sb->tcon;
215 unsigned int bytes_read;
221 inode->i_mode |= S_IFIFO;
223 } else if (size < 8) {
224 return -EINVAL; /* EOPNOTSUPP? */
227 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
228 CREATE_NOT_DIR, &netfid, &oplock, NULL,
230 cifs_sb->mnt_cifs_flags &
231 CIFS_MOUNT_MAP_SPECIAL_CHR);
233 int buf_type = CIFS_NO_BUFFER;
235 rc = CIFSSMBRead(xid, pTcon,
237 24 /* length */, 0 /* offset */,
238 &bytes_read, &pbuf, &buf_type);
239 if((rc == 0) && (bytes_read >= 8)) {
240 if(memcmp("IntxBLK", pbuf, 8) == 0) {
241 cFYI(1,("Block device"));
242 inode->i_mode |= S_IFBLK;
243 if(bytes_read == 24) {
244 /* we have enough to decode dev num */
245 __u64 mjr; /* major */
246 __u64 mnr; /* minor */
247 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
248 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
249 inode->i_rdev = MKDEV(mjr, mnr);
251 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
252 cFYI(1,("Char device"));
253 inode->i_mode |= S_IFCHR;
254 if(bytes_read == 24) {
255 /* we have enough to decode dev num */
256 __u64 mjr; /* major */
257 __u64 mnr; /* minor */
258 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
259 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
260 inode->i_rdev = MKDEV(mjr, mnr);
262 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
264 inode->i_mode |= S_IFLNK;
266 inode->i_mode |= S_IFREG; /* file? */
270 inode->i_mode |= S_IFREG; /* then it is a file */
271 rc = -EOPNOTSUPP; /* or some unknown SFU type */
273 CIFSSMBClose(xid, pTcon, netfid);
279 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
281 static int get_sfu_uid_mode(struct inode * inode,
282 const unsigned char *path,
283 struct cifs_sb_info *cifs_sb, int xid)
285 #ifdef CONFIG_CIFS_XATTR
290 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
291 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
292 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
296 mode = le32_to_cpu(*((__le32 *)ea_value));
297 inode->i_mode &= ~SFBITS_MASK;
298 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
299 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
300 cFYI(1,("special mode bits 0%o", mode));
312 int cifs_get_inode_info(struct inode **pinode,
313 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
314 struct super_block *sb, int xid)
317 struct cifsTconInfo *pTcon;
319 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
323 pTcon = cifs_sb->tcon;
324 cFYI(1,("Getting info on %s", search_path));
326 if ((pfindData == NULL) && (*pinode != NULL)) {
327 if (CIFS_I(*pinode)->clientCanCacheRead) {
328 cFYI(1,("No need to revalidate cached inode sizes"));
333 /* if file info not passed in then get it from server */
334 if (pfindData == NULL) {
335 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
338 pfindData = (FILE_ALL_INFO *)buf;
339 /* could do find first instead but this returns more info */
340 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
342 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
343 CIFS_MOUNT_MAP_SPECIAL_CHR);
344 /* BB optimize code so we do not make the above call
345 when server claims no NT SMB support and the above call
346 failed at least once - set flag in tcon or mount */
347 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
348 rc = SMBQueryInformation(xid, pTcon, search_path,
349 pfindData, cifs_sb->local_nls,
350 cifs_sb->mnt_cifs_flags &
351 CIFS_MOUNT_MAP_SPECIAL_CHR);
355 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
357 if (rc == -EREMOTE) {
362 strnlen(search_path, MAX_PATHCONF) + 1,
364 if (tmp_path == NULL) {
369 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
370 strncat(tmp_path, search_path, MAX_PATHCONF);
371 rc = connect_to_dfs_path(xid, pTcon->ses,
372 /* treename + */ tmp_path,
374 cifs_sb->mnt_cifs_flags &
375 CIFS_MOUNT_MAP_SPECIAL_CHR);
377 /* BB fix up inode etc. */
383 struct cifsInodeInfo *cifsInfo;
384 __u32 attr = le32_to_cpu(pfindData->Attributes);
387 if (*pinode == NULL) {
388 *pinode = new_inode(sb);
389 if (*pinode == NULL) {
393 /* Is an i_ino of zero legal? Can we use that to check
394 if the server supports returning inode numbers? Are
395 there other sanity checks we can use to ensure that
396 the server is really filling in that field? */
398 /* We can not use the IndexNumber field by default from
399 Windows or Samba (in ALL_INFO buf) but we can request
400 it explicitly. It may not be unique presumably if
401 the server has multiple devices mounted under one
404 /* There may be higher info levels that work but are
405 there Windows server or network appliances for which
406 IndexNumber field is not guaranteed unique? */
408 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
412 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
413 search_path, &inode_num,
415 cifs_sb->mnt_cifs_flags &
416 CIFS_MOUNT_MAP_SPECIAL_CHR);
418 cFYI(1,("GetSrvInodeNum rc %d", rc1));
419 /* BB EOPNOSUPP disable SERVER_INUM? */
420 } else /* do we need cast or hash to ino? */
421 (*pinode)->i_ino = inode_num;
422 } /* else ino incremented to unique num in new_inode*/
423 insert_inode_hash(*pinode);
426 cifsInfo = CIFS_I(inode);
427 cifsInfo->cifsAttrs = attr;
428 cFYI(1, ("Old time %ld", cifsInfo->time));
429 cifsInfo->time = jiffies;
430 cFYI(1, ("New time %ld", cifsInfo->time));
432 /* blksize needs to be multiple of two. So safer to default to
433 blksize and blkbits set in superblock so 2**blkbits and blksize
434 will match rather than setting to:
435 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
437 /* Linux can not store file creation time so ignore it */
438 if(pfindData->LastAccessTime)
439 inode->i_atime = cifs_NTtimeToUnix
440 (le64_to_cpu(pfindData->LastAccessTime));
441 else /* do not need to use current_fs_time - time not stored */
442 inode->i_atime = CURRENT_TIME;
444 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
446 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
447 cFYI(0, ("Attributes came in as 0x%x", attr));
449 /* set default mode. will override for dirs below */
450 if (atomic_read(&cifsInfo->inUse) == 0)
451 /* new inode, can safely set these fields */
452 inode->i_mode = cifs_sb->mnt_file_mode;
453 else /* since we set the inode type below we need to mask off
454 to avoid strange results if type changes and both get orred in */
455 inode->i_mode &= ~S_IFMT;
456 /* if (attr & ATTR_REPARSE) */
457 /* We no longer handle these as symlinks because we could not
458 follow them due to the absolute path with drive letter */
459 if (attr & ATTR_DIRECTORY) {
460 /* override default perms since we do not do byte range locking
462 inode->i_mode = cifs_sb->mnt_dir_mode;
463 inode->i_mode |= S_IFDIR;
464 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
465 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
466 /* No need to le64 convert size of zero */
467 (pfindData->EndOfFile == 0)) {
468 inode->i_mode = cifs_sb->mnt_file_mode;
469 inode->i_mode |= S_IFIFO;
470 /* BB Finish for SFU style symlinks and devices */
471 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
472 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
473 if (decode_sfu_inode(inode,
474 le64_to_cpu(pfindData->EndOfFile),
477 cFYI(1,("Unrecognized sfu inode type"));
479 cFYI(1,("sfu mode 0%o",inode->i_mode));
481 inode->i_mode |= S_IFREG;
482 /* treat the dos attribute of read-only as read-only
484 if (cifsInfo->cifsAttrs & ATTR_READONLY)
485 inode->i_mode &= ~(S_IWUGO);
486 /* BB add code here -
487 validate if device or weird share or device type? */
489 if (is_size_safe_to_change(cifsInfo)) {
490 /* can not safely change the file size here if the
491 client is writing to it due to potential races */
492 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
494 /* 512 bytes (2**9) is the fake blocksize that must be
495 used for this calculation */
496 inode->i_blocks = (512 - 1 + le64_to_cpu(
497 pfindData->AllocationSize)) >> 9;
500 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
502 /* BB fill in uid and gid here? with help from winbind?
503 or retrieve from NTFS stream extended attribute */
504 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
505 /* fill in uid, gid, mode from server ACL */
506 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
507 } else if (atomic_read(&cifsInfo->inUse) == 0) {
508 inode->i_uid = cifs_sb->mnt_uid;
509 inode->i_gid = cifs_sb->mnt_gid;
510 /* set so we do not keep refreshing these fields with
511 bad data after user has changed them in memory */
512 atomic_set(&cifsInfo->inUse,1);
515 if (S_ISREG(inode->i_mode)) {
516 cFYI(1, ("File inode"));
517 inode->i_op = &cifs_file_inode_ops;
518 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
519 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
521 &cifs_file_direct_nobrl_ops;
523 inode->i_fop = &cifs_file_direct_ops;
524 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
525 inode->i_fop = &cifs_file_nobrl_ops;
526 else /* not direct, send byte range locks */
527 inode->i_fop = &cifs_file_ops;
529 if(pTcon->ses->server->maxBuf <
530 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
531 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
533 inode->i_data.a_ops = &cifs_addr_ops;
534 } else if (S_ISDIR(inode->i_mode)) {
535 cFYI(1, ("Directory inode"));
536 inode->i_op = &cifs_dir_inode_ops;
537 inode->i_fop = &cifs_dir_ops;
538 } else if (S_ISLNK(inode->i_mode)) {
539 cFYI(1, ("Symbolic Link inode"));
540 inode->i_op = &cifs_symlink_inode_ops;
542 init_special_inode(inode, inode->i_mode,
550 /* gets root inode */
551 void cifs_read_inode(struct inode *inode)
554 struct cifs_sb_info *cifs_sb;
556 cifs_sb = CIFS_SB(inode->i_sb);
558 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
559 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
561 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
562 /* can not call macro FreeXid here since in a void func */
566 int cifs_unlink(struct inode *inode, struct dentry *direntry)
570 struct cifs_sb_info *cifs_sb;
571 struct cifsTconInfo *pTcon;
572 char *full_path = NULL;
573 struct cifsInodeInfo *cifsInode;
574 FILE_BASIC_INFO *pinfo_buf;
576 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
581 cifs_sb = CIFS_SB(inode->i_sb);
583 cifs_sb = CIFS_SB(direntry->d_sb);
584 pTcon = cifs_sb->tcon;
586 /* Unlink can be called from rename so we can not grab the sem here
587 since we deadlock otherwise */
588 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
589 full_path = build_path_from_dentry(direntry);
590 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
591 if (full_path == NULL) {
595 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
596 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
599 if (direntry->d_inode)
600 direntry->d_inode->i_nlink--;
601 } else if (rc == -ENOENT) {
603 } else if (rc == -ETXTBSY) {
607 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
608 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
609 &netfid, &oplock, NULL, cifs_sb->local_nls,
610 cifs_sb->mnt_cifs_flags &
611 CIFS_MOUNT_MAP_SPECIAL_CHR);
613 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
615 cifs_sb->mnt_cifs_flags &
616 CIFS_MOUNT_MAP_SPECIAL_CHR);
617 CIFSSMBClose(xid, pTcon, netfid);
618 if (direntry->d_inode)
619 direntry->d_inode->i_nlink--;
621 } else if (rc == -EACCES) {
622 /* try only if r/o attribute set in local lookup data? */
623 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
625 /* ATTRS set to normal clears r/o bit */
626 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
627 if (!(pTcon->ses->flags & CIFS_SES_NT4))
628 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
631 cifs_sb->mnt_cifs_flags &
632 CIFS_MOUNT_MAP_SPECIAL_CHR);
636 if (rc == -EOPNOTSUPP) {
639 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
643 For some strange reason it seems that NT4 eats the
644 old setattr call without actually setting the
645 attributes so on to the third attempted workaround
648 /* BB could scan to see if we already have it open
649 and pass in pid of opener to function */
650 rc = CIFSSMBOpen(xid, pTcon, full_path,
651 FILE_OPEN, SYNCHRONIZE |
652 FILE_WRITE_ATTRIBUTES, 0,
653 &netfid, &oplock, NULL,
655 cifs_sb->mnt_cifs_flags &
656 CIFS_MOUNT_MAP_SPECIAL_CHR);
658 rc = CIFSSMBSetFileTimes(xid, pTcon,
661 CIFSSMBClose(xid, pTcon, netfid);
667 rc = CIFSSMBDelFile(xid, pTcon, full_path,
669 cifs_sb->mnt_cifs_flags &
670 CIFS_MOUNT_MAP_SPECIAL_CHR);
672 if (direntry->d_inode)
673 direntry->d_inode->i_nlink--;
674 } else if (rc == -ETXTBSY) {
678 rc = CIFSSMBOpen(xid, pTcon, full_path,
681 CREATE_DELETE_ON_CLOSE,
682 &netfid, &oplock, NULL,
684 cifs_sb->mnt_cifs_flags &
685 CIFS_MOUNT_MAP_SPECIAL_CHR);
687 CIFSSMBRenameOpenFile(xid, pTcon,
690 cifs_sb->mnt_cifs_flags &
691 CIFS_MOUNT_MAP_SPECIAL_CHR);
692 CIFSSMBClose(xid, pTcon, netfid);
693 if (direntry->d_inode)
694 direntry->d_inode->i_nlink--;
696 /* BB if rc = -ETXTBUSY goto the rename logic BB */
700 if (direntry->d_inode) {
701 cifsInode = CIFS_I(direntry->d_inode);
702 cifsInode->time = 0; /* will force revalidate to get info
704 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
707 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
708 cifsInode = CIFS_I(inode);
709 cifsInode->time = 0; /* force revalidate of dir as well */
717 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
721 struct cifs_sb_info *cifs_sb;
722 struct cifsTconInfo *pTcon;
723 char *full_path = NULL;
724 struct inode *newinode = NULL;
726 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
730 cifs_sb = CIFS_SB(inode->i_sb);
731 pTcon = cifs_sb->tcon;
733 full_path = build_path_from_dentry(direntry);
734 if (full_path == NULL) {
738 /* BB add setting the equivalent of mode via CreateX w/ACLs */
739 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
740 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
742 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
746 if (pTcon->ses->capabilities & CAP_UNIX)
747 rc = cifs_get_inode_info_unix(&newinode, full_path,
750 rc = cifs_get_inode_info(&newinode, full_path, NULL,
754 direntry->d_op = &cifs_ci_dentry_ops;
756 direntry->d_op = &cifs_dentry_ops;
757 d_instantiate(direntry, newinode);
758 if (direntry->d_inode)
759 direntry->d_inode->i_nlink = 2;
760 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
761 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
762 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
764 (__u64)current->fsuid,
765 (__u64)current->fsgid,
768 cifs_sb->mnt_cifs_flags &
769 CIFS_MOUNT_MAP_SPECIAL_CHR);
771 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
773 (__u64)-1, 0 /* dev_t */,
775 cifs_sb->mnt_cifs_flags &
776 CIFS_MOUNT_MAP_SPECIAL_CHR);
779 /* BB to be implemented via Windows secrty descriptors
780 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
781 -1, -1, local_nls); */
782 if(direntry->d_inode) {
783 direntry->d_inode->i_mode = mode;
784 direntry->d_inode->i_mode |= S_IFDIR;
785 if(cifs_sb->mnt_cifs_flags &
786 CIFS_MOUNT_SET_UID) {
787 direntry->d_inode->i_uid =
789 direntry->d_inode->i_gid =
800 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
804 struct cifs_sb_info *cifs_sb;
805 struct cifsTconInfo *pTcon;
806 char *full_path = NULL;
807 struct cifsInodeInfo *cifsInode;
809 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
813 cifs_sb = CIFS_SB(inode->i_sb);
814 pTcon = cifs_sb->tcon;
816 full_path = build_path_from_dentry(direntry);
817 if (full_path == NULL) {
822 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
823 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
827 i_size_write(direntry->d_inode,0);
828 direntry->d_inode->i_nlink = 0;
831 cifsInode = CIFS_I(direntry->d_inode);
832 cifsInode->time = 0; /* force revalidate to go get info when
834 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
835 current_fs_time(inode->i_sb);
842 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
843 struct inode *target_inode, struct dentry *target_direntry)
847 struct cifs_sb_info *cifs_sb_source;
848 struct cifs_sb_info *cifs_sb_target;
849 struct cifsTconInfo *pTcon;
855 cifs_sb_target = CIFS_SB(target_inode->i_sb);
856 cifs_sb_source = CIFS_SB(source_inode->i_sb);
857 pTcon = cifs_sb_source->tcon;
859 if (pTcon != cifs_sb_target->tcon) {
861 return -EXDEV; /* BB actually could be allowed if same server,
863 Might eventually add support for this */
866 /* we already have the rename sem so we do not need to grab it again
867 here to protect the path integrity */
868 fromName = build_path_from_dentry(source_direntry);
869 toName = build_path_from_dentry(target_direntry);
870 if ((fromName == NULL) || (toName == NULL)) {
872 goto cifs_rename_exit;
875 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
876 cifs_sb_source->local_nls,
877 cifs_sb_source->mnt_cifs_flags &
878 CIFS_MOUNT_MAP_SPECIAL_CHR);
880 /* check if they are the same file because rename of hardlinked
882 FILE_UNIX_BASIC_INFO *info_buf_source;
883 FILE_UNIX_BASIC_INFO *info_buf_target;
886 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
887 if (info_buf_source != NULL) {
888 info_buf_target = info_buf_source + 1;
889 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
890 info_buf_source, cifs_sb_source->local_nls,
891 cifs_sb_source->mnt_cifs_flags &
892 CIFS_MOUNT_MAP_SPECIAL_CHR);
894 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
896 cifs_sb_target->local_nls,
897 /* remap based on source sb */
898 cifs_sb_source->mnt_cifs_flags &
899 CIFS_MOUNT_MAP_SPECIAL_CHR);
902 (info_buf_source->UniqueId ==
903 info_buf_target->UniqueId)) {
904 /* do not rename since the files are hardlinked which
907 /* we either can not tell the files are hardlinked
908 (as with Windows servers) or files are not
909 hardlinked so delete the target manually before
910 renaming to follow POSIX rather than Windows
912 cifs_unlink(target_inode, target_direntry);
913 rc = CIFSSMBRename(xid, pTcon, fromName,
915 cifs_sb_source->local_nls,
916 cifs_sb_source->mnt_cifs_flags
917 & CIFS_MOUNT_MAP_SPECIAL_CHR);
919 kfree(info_buf_source);
920 } /* if we can not get memory just leave rc as EEXIST */
924 cFYI(1, ("rename rc %d", rc));
927 if ((rc == -EIO) || (rc == -EEXIST)) {
931 /* BB FIXME Is Generic Read correct for rename? */
932 /* if renaming directory - we should not say CREATE_NOT_DIR,
933 need to test renaming open directory, also GENERIC_READ
934 might not right be right access to request */
935 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
936 CREATE_NOT_DIR, &netfid, &oplock, NULL,
937 cifs_sb_source->local_nls,
938 cifs_sb_source->mnt_cifs_flags &
939 CIFS_MOUNT_MAP_SPECIAL_CHR);
941 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
942 cifs_sb_source->local_nls,
943 cifs_sb_source->mnt_cifs_flags &
944 CIFS_MOUNT_MAP_SPECIAL_CHR);
945 CIFSSMBClose(xid, pTcon, netfid);
956 int cifs_revalidate(struct dentry *direntry)
961 struct cifs_sb_info *cifs_sb;
962 struct cifsInodeInfo *cifsInode;
964 struct timespec local_mtime;
965 int invalidate_inode = FALSE;
967 if (direntry->d_inode == NULL)
970 cifsInode = CIFS_I(direntry->d_inode);
972 if (cifsInode == NULL)
975 /* no sense revalidating inode info on file that no one can write */
976 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
981 cifs_sb = CIFS_SB(direntry->d_sb);
983 /* can not safely grab the rename sem here if rename calls revalidate
984 since that would deadlock */
985 full_path = build_path_from_dentry(direntry);
986 if (full_path == NULL) {
990 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
991 "jiffies %ld", full_path, direntry->d_inode,
992 direntry->d_inode->i_count.counter, direntry,
993 direntry->d_time, jiffies));
995 if (cifsInode->time == 0) {
996 /* was set to zero previously to force revalidate */
997 } else if (time_before(jiffies, cifsInode->time + HZ) &&
998 lookupCacheEnabled) {
999 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1000 (direntry->d_inode->i_nlink == 1)) {
1005 cFYI(1, ("Have to revalidate file due to hardlinks"));
1009 /* save mtime and size */
1010 local_mtime = direntry->d_inode->i_mtime;
1011 local_size = direntry->d_inode->i_size;
1013 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1014 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1015 direntry->d_sb,xid);
1017 cFYI(1, ("error on getting revalidate info %d", rc));
1018 /* if (rc != -ENOENT)
1019 rc = 0; */ /* BB should we cache info on
1023 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1024 direntry->d_sb,xid);
1026 cFYI(1, ("error on getting revalidate info %d", rc));
1027 /* if (rc != -ENOENT)
1028 rc = 0; */ /* BB should we cache info on
1032 /* should we remap certain errors, access denied?, to zero */
1034 /* if not oplocked, we invalidate inode pages if mtime or file size
1035 had changed on server */
1037 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1038 (local_size == direntry->d_inode->i_size)) {
1039 cFYI(1, ("cifs_revalidate - inode unchanged"));
1041 /* file may have changed on server */
1042 if (cifsInode->clientCanCacheRead) {
1043 /* no need to invalidate inode pages since we were the
1044 only ones who could have modified the file and the
1045 server copy is staler than ours */
1047 invalidate_inode = TRUE;
1051 /* can not grab this sem since kernel filesys locking documentation
1052 indicates i_mutex may be taken by the kernel on lookup and rename
1053 which could deadlock if we grab the i_mutex here as well */
1054 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1055 /* need to write out dirty pages here */
1056 if (direntry->d_inode->i_mapping) {
1057 /* do we need to lock inode until after invalidate completes
1059 filemap_fdatawrite(direntry->d_inode->i_mapping);
1061 if (invalidate_inode) {
1062 /* shrink_dcache not necessary now that cifs dentry ops
1063 are exported for negative dentries */
1064 /* if(S_ISDIR(direntry->d_inode->i_mode))
1065 shrink_dcache_parent(direntry); */
1066 if (S_ISREG(direntry->d_inode->i_mode)) {
1067 if (direntry->d_inode->i_mapping)
1068 filemap_fdatawait(direntry->d_inode->i_mapping);
1069 /* may eventually have to do this for open files too */
1070 if (list_empty(&(cifsInode->openFileList))) {
1071 /* changed on server - flush read ahead pages */
1072 cFYI(1, ("Invalidating read ahead data on "
1074 invalidate_remote_inode(direntry->d_inode);
1078 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1085 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1088 int err = cifs_revalidate(dentry);
1090 generic_fillattr(dentry->d_inode, stat);
1094 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1096 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1097 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1102 page = grab_cache_page(mapping, index);
1106 kaddr = kmap_atomic(page, KM_USER0);
1107 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1108 flush_dcache_page(page);
1109 kunmap_atomic(kaddr, KM_USER0);
1111 page_cache_release(page);
1115 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1118 struct cifs_sb_info *cifs_sb;
1119 struct cifsTconInfo *pTcon;
1120 char *full_path = NULL;
1122 struct cifsFileInfo *open_file = NULL;
1123 FILE_BASIC_INFO time_buf;
1124 int set_time = FALSE;
1125 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1126 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1127 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1128 struct cifsInodeInfo *cifsInode;
1132 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1133 direntry->d_name.name, attrs->ia_valid));
1135 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1136 pTcon = cifs_sb->tcon;
1138 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1139 /* check if we have permission to change attrs */
1140 rc = inode_change_ok(direntry->d_inode, attrs);
1148 full_path = build_path_from_dentry(direntry);
1149 if (full_path == NULL) {
1153 cifsInode = CIFS_I(direntry->d_inode);
1155 /* BB check if we need to refresh inode from server now ? BB */
1157 /* need to flush data before changing file size on server */
1158 filemap_write_and_wait(direntry->d_inode->i_mapping);
1160 if (attrs->ia_valid & ATTR_SIZE) {
1161 /* To avoid spurious oplock breaks from server, in the case of
1162 inodes that we already have open, avoid doing path based
1163 setting of file size if we can do it by handle.
1164 This keeps our caching token (oplock) and avoids timeouts
1165 when the local oplock break takes longer to flush
1166 writebehind data than the SMB timeout for the SetPathInfo
1167 request would allow */
1169 open_file = find_writable_file(cifsInode);
1171 __u16 nfid = open_file->netfid;
1172 __u32 npid = open_file->pid;
1173 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1175 atomic_dec(&open_file->wrtPending);
1176 cFYI(1,("SetFSize for attrs rc = %d", rc));
1177 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1179 rc = CIFSSMBWrite(xid, pTcon,
1180 nfid, 0, attrs->ia_size,
1181 &bytes_written, NULL, NULL,
1182 1 /* 45 seconds */);
1183 cFYI(1,("Wrt seteof rc %d", rc));
1189 /* Set file size by pathname rather than by handle
1190 either because no valid, writeable file handle for
1191 it was found or because there was an error setting
1193 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1194 attrs->ia_size, FALSE,
1196 cifs_sb->mnt_cifs_flags &
1197 CIFS_MOUNT_MAP_SPECIAL_CHR);
1198 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1199 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1203 rc = SMBLegacyOpen(xid, pTcon, full_path,
1205 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1206 CREATE_NOT_DIR, &netfid, &oplock,
1207 NULL, cifs_sb->local_nls,
1208 cifs_sb->mnt_cifs_flags &
1209 CIFS_MOUNT_MAP_SPECIAL_CHR);
1212 rc = CIFSSMBWrite(xid, pTcon,
1215 &bytes_written, NULL,
1216 NULL, 1 /* 45 sec */);
1217 cFYI(1,("wrt seteof rc %d",rc));
1218 CIFSSMBClose(xid, pTcon, netfid);
1224 /* Server is ok setting allocation size implicitly - no need
1226 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1227 cifs_sb->local_nls);
1231 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1232 cifs_truncate_page(direntry->d_inode->i_mapping,
1233 direntry->d_inode->i_size);
1235 goto cifs_setattr_exit;
1237 if (attrs->ia_valid & ATTR_UID) {
1238 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1239 uid = attrs->ia_uid;
1241 if (attrs->ia_valid & ATTR_GID) {
1242 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1243 gid = attrs->ia_gid;
1246 time_buf.Attributes = 0;
1247 if (attrs->ia_valid & ATTR_MODE) {
1248 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1249 mode = attrs->ia_mode;
1252 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1253 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1254 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1255 0 /* dev_t */, cifs_sb->local_nls,
1256 cifs_sb->mnt_cifs_flags &
1257 CIFS_MOUNT_MAP_SPECIAL_CHR);
1258 else if (attrs->ia_valid & ATTR_MODE) {
1260 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1261 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1262 time_buf.Attributes =
1263 cpu_to_le32(cifsInode->cifsAttrs |
1265 } else if ((mode & S_IWUGO) == S_IWUGO) {
1266 if (cifsInode->cifsAttrs & ATTR_READONLY)
1267 time_buf.Attributes =
1268 cpu_to_le32(cifsInode->cifsAttrs &
1271 /* BB to be implemented -
1272 via Windows security descriptors or streams */
1273 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1274 cifs_sb->local_nls); */
1277 if (attrs->ia_valid & ATTR_ATIME) {
1279 time_buf.LastAccessTime =
1280 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1282 time_buf.LastAccessTime = 0;
1284 if (attrs->ia_valid & ATTR_MTIME) {
1286 time_buf.LastWriteTime =
1287 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1289 time_buf.LastWriteTime = 0;
1290 /* Do not set ctime explicitly unless other time
1291 stamps are changed explicitly (i.e. by utime()
1292 since we would then have a mix of client and
1295 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1297 /* Although Samba throws this field away
1298 it may be useful to Windows - but we do
1299 not want to set ctime unless some other
1300 timestamp is changing */
1301 cFYI(1, ("CIFS - CTIME changed"));
1302 time_buf.ChangeTime =
1303 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1305 time_buf.ChangeTime = 0;
1307 if (set_time || time_buf.Attributes) {
1308 time_buf.CreationTime = 0; /* do not change */
1309 /* In the future we should experiment - try setting timestamps
1310 via Handle (SetFileInfo) instead of by path */
1311 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1312 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1314 cifs_sb->mnt_cifs_flags &
1315 CIFS_MOUNT_MAP_SPECIAL_CHR);
1319 if (rc == -EOPNOTSUPP) {
1323 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1324 "times not supported by this server"));
1325 /* BB we could scan to see if we already have it open
1326 and pass in pid of opener to function */
1327 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1328 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1329 CREATE_NOT_DIR, &netfid, &oplock,
1330 NULL, cifs_sb->local_nls,
1331 cifs_sb->mnt_cifs_flags &
1332 CIFS_MOUNT_MAP_SPECIAL_CHR);
1334 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1336 CIFSSMBClose(xid, pTcon, netfid);
1338 /* BB For even older servers we could convert time_buf
1339 into old DOS style which uses two second
1342 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1343 &time_buf, cifs_sb->local_nls); */
1346 /* Even if error on time set, no sense failing the call if
1347 the server would set the time to a reasonable value anyway,
1348 and this check ensures that we are not being called from
1349 sys_utimes in which case we ought to fail the call back to
1350 the user when the server rejects the call */
1351 if((rc) && (attrs->ia_valid &&
1352 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1356 /* do not need local check to inode_check_ok since the server does
1359 rc = inode_setattr(direntry->d_inode, attrs);
1366 void cifs_delete_inode(struct inode *inode)
1368 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1369 /* may have to add back in if and when safe distributed caching of
1370 directories added e.g. via FindNotify */