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,
341 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
342 CIFS_MOUNT_MAP_SPECIAL_CHR);
343 /* BB optimize code so we do not make the above call
344 when server claims no NT SMB support and the above call
345 failed at least once - set flag in tcon or mount */
346 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
347 rc = SMBQueryInformation(xid, pTcon, search_path,
348 pfindData, cifs_sb->local_nls,
349 cifs_sb->mnt_cifs_flags &
350 CIFS_MOUNT_MAP_SPECIAL_CHR);
354 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
356 if (rc == -EREMOTE) {
361 strnlen(search_path, MAX_PATHCONF) + 1,
363 if (tmp_path == NULL) {
368 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
369 strncat(tmp_path, search_path, MAX_PATHCONF);
370 rc = connect_to_dfs_path(xid, pTcon->ses,
371 /* treename + */ tmp_path,
373 cifs_sb->mnt_cifs_flags &
374 CIFS_MOUNT_MAP_SPECIAL_CHR);
376 /* BB fix up inode etc. */
382 struct cifsInodeInfo *cifsInfo;
383 __u32 attr = le32_to_cpu(pfindData->Attributes);
386 if (*pinode == NULL) {
387 *pinode = new_inode(sb);
390 /* Is an i_ino of zero legal? Can we use that to check
391 if the server supports returning inode numbers? Are
392 there other sanity checks we can use to ensure that
393 the server is really filling in that field? */
395 /* We can not use the IndexNumber field by default from
396 Windows or Samba (in ALL_INFO buf) but we can request
397 it explicitly. It may not be unique presumably if
398 the server has multiple devices mounted under one
401 /* There may be higher info levels that work but are
402 there Windows server or network appliances for which
403 IndexNumber field is not guaranteed unique? */
405 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
409 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
410 search_path, &inode_num,
412 cifs_sb->mnt_cifs_flags &
413 CIFS_MOUNT_MAP_SPECIAL_CHR);
415 cFYI(1,("GetSrvInodeNum rc %d", rc1));
416 /* BB EOPNOSUPP disable SERVER_INUM? */
417 } else /* do we need cast or hash to ino? */
418 (*pinode)->i_ino = inode_num;
419 } /* else ino incremented to unique num in new_inode*/
420 insert_inode_hash(*pinode);
423 cifsInfo = CIFS_I(inode);
424 cifsInfo->cifsAttrs = attr;
425 cFYI(1, ("Old time %ld", cifsInfo->time));
426 cifsInfo->time = jiffies;
427 cFYI(1, ("New time %ld", cifsInfo->time));
429 /* blksize needs to be multiple of two. So safer to default to
430 blksize and blkbits set in superblock so 2**blkbits and blksize
431 will match rather than setting to:
432 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
434 /* Linux can not store file creation time so ignore it */
435 if(pfindData->LastAccessTime)
436 inode->i_atime = cifs_NTtimeToUnix
437 (le64_to_cpu(pfindData->LastAccessTime));
438 else /* do not need to use current_fs_time - time not stored */
439 inode->i_atime = CURRENT_TIME;
441 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
443 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
444 cFYI(0, ("Attributes came in as 0x%x", attr));
446 /* set default mode. will override for dirs below */
447 if (atomic_read(&cifsInfo->inUse) == 0)
448 /* new inode, can safely set these fields */
449 inode->i_mode = cifs_sb->mnt_file_mode;
450 else /* since we set the inode type below we need to mask off
451 to avoid strange results if type changes and both get orred in */
452 inode->i_mode &= ~S_IFMT;
453 /* if (attr & ATTR_REPARSE) */
454 /* We no longer handle these as symlinks because we could not
455 follow them due to the absolute path with drive letter */
456 if (attr & ATTR_DIRECTORY) {
457 /* override default perms since we do not do byte range locking
459 inode->i_mode = cifs_sb->mnt_dir_mode;
460 inode->i_mode |= S_IFDIR;
461 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
462 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
463 /* No need to le64 convert size of zero */
464 (pfindData->EndOfFile == 0)) {
465 inode->i_mode = cifs_sb->mnt_file_mode;
466 inode->i_mode |= S_IFIFO;
467 /* BB Finish for SFU style symlinks and devices */
468 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
469 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
470 if (decode_sfu_inode(inode,
471 le64_to_cpu(pfindData->EndOfFile),
474 cFYI(1,("Unrecognized sfu inode type"));
476 cFYI(1,("sfu mode 0%o",inode->i_mode));
478 inode->i_mode |= S_IFREG;
479 /* treat the dos attribute of read-only as read-only
481 if (cifsInfo->cifsAttrs & ATTR_READONLY)
482 inode->i_mode &= ~(S_IWUGO);
483 /* BB add code here -
484 validate if device or weird share or device type? */
486 if (is_size_safe_to_change(cifsInfo)) {
487 /* can not safely change the file size here if the
488 client is writing to it due to potential races */
489 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
491 /* 512 bytes (2**9) is the fake blocksize that must be
492 used for this calculation */
493 inode->i_blocks = (512 - 1 + le64_to_cpu(
494 pfindData->AllocationSize)) >> 9;
497 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
499 /* BB fill in uid and gid here? with help from winbind?
500 or retrieve from NTFS stream extended attribute */
501 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
502 /* fill in uid, gid, mode from server ACL */
503 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
504 } else if (atomic_read(&cifsInfo->inUse) == 0) {
505 inode->i_uid = cifs_sb->mnt_uid;
506 inode->i_gid = cifs_sb->mnt_gid;
507 /* set so we do not keep refreshing these fields with
508 bad data after user has changed them in memory */
509 atomic_set(&cifsInfo->inUse,1);
512 if (S_ISREG(inode->i_mode)) {
513 cFYI(1, ("File inode"));
514 inode->i_op = &cifs_file_inode_ops;
515 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
516 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
518 &cifs_file_direct_nobrl_ops;
520 inode->i_fop = &cifs_file_direct_ops;
521 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
522 inode->i_fop = &cifs_file_nobrl_ops;
523 else /* not direct, send byte range locks */
524 inode->i_fop = &cifs_file_ops;
526 if(pTcon->ses->server->maxBuf <
527 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
528 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
530 inode->i_data.a_ops = &cifs_addr_ops;
531 } else if (S_ISDIR(inode->i_mode)) {
532 cFYI(1, ("Directory inode"));
533 inode->i_op = &cifs_dir_inode_ops;
534 inode->i_fop = &cifs_dir_ops;
535 } else if (S_ISLNK(inode->i_mode)) {
536 cFYI(1, ("Symbolic Link inode"));
537 inode->i_op = &cifs_symlink_inode_ops;
539 init_special_inode(inode, inode->i_mode,
547 /* gets root inode */
548 void cifs_read_inode(struct inode *inode)
551 struct cifs_sb_info *cifs_sb;
553 cifs_sb = CIFS_SB(inode->i_sb);
555 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
556 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
558 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
559 /* can not call macro FreeXid here since in a void func */
563 int cifs_unlink(struct inode *inode, struct dentry *direntry)
567 struct cifs_sb_info *cifs_sb;
568 struct cifsTconInfo *pTcon;
569 char *full_path = NULL;
570 struct cifsInodeInfo *cifsInode;
571 FILE_BASIC_INFO *pinfo_buf;
573 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
578 cifs_sb = CIFS_SB(inode->i_sb);
580 cifs_sb = CIFS_SB(direntry->d_sb);
581 pTcon = cifs_sb->tcon;
583 /* Unlink can be called from rename so we can not grab the sem here
584 since we deadlock otherwise */
585 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
586 full_path = build_path_from_dentry(direntry);
587 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
588 if (full_path == NULL) {
592 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
593 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
596 if (direntry->d_inode)
597 direntry->d_inode->i_nlink--;
598 } else if (rc == -ENOENT) {
600 } else if (rc == -ETXTBSY) {
604 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
605 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
606 &netfid, &oplock, NULL, cifs_sb->local_nls,
607 cifs_sb->mnt_cifs_flags &
608 CIFS_MOUNT_MAP_SPECIAL_CHR);
610 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
612 cifs_sb->mnt_cifs_flags &
613 CIFS_MOUNT_MAP_SPECIAL_CHR);
614 CIFSSMBClose(xid, pTcon, netfid);
615 if (direntry->d_inode)
616 direntry->d_inode->i_nlink--;
618 } else if (rc == -EACCES) {
619 /* try only if r/o attribute set in local lookup data? */
620 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
622 /* ATTRS set to normal clears r/o bit */
623 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
624 if (!(pTcon->ses->flags & CIFS_SES_NT4))
625 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
628 cifs_sb->mnt_cifs_flags &
629 CIFS_MOUNT_MAP_SPECIAL_CHR);
633 if (rc == -EOPNOTSUPP) {
636 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
640 For some strange reason it seems that NT4 eats the
641 old setattr call without actually setting the
642 attributes so on to the third attempted workaround
645 /* BB could scan to see if we already have it open
646 and pass in pid of opener to function */
647 rc = CIFSSMBOpen(xid, pTcon, full_path,
648 FILE_OPEN, SYNCHRONIZE |
649 FILE_WRITE_ATTRIBUTES, 0,
650 &netfid, &oplock, NULL,
652 cifs_sb->mnt_cifs_flags &
653 CIFS_MOUNT_MAP_SPECIAL_CHR);
655 rc = CIFSSMBSetFileTimes(xid, pTcon,
658 CIFSSMBClose(xid, pTcon, netfid);
664 rc = CIFSSMBDelFile(xid, pTcon, full_path,
666 cifs_sb->mnt_cifs_flags &
667 CIFS_MOUNT_MAP_SPECIAL_CHR);
669 if (direntry->d_inode)
670 direntry->d_inode->i_nlink--;
671 } else if (rc == -ETXTBSY) {
675 rc = CIFSSMBOpen(xid, pTcon, full_path,
678 CREATE_DELETE_ON_CLOSE,
679 &netfid, &oplock, NULL,
681 cifs_sb->mnt_cifs_flags &
682 CIFS_MOUNT_MAP_SPECIAL_CHR);
684 CIFSSMBRenameOpenFile(xid, pTcon,
687 cifs_sb->mnt_cifs_flags &
688 CIFS_MOUNT_MAP_SPECIAL_CHR);
689 CIFSSMBClose(xid, pTcon, netfid);
690 if (direntry->d_inode)
691 direntry->d_inode->i_nlink--;
693 /* BB if rc = -ETXTBUSY goto the rename logic BB */
697 if (direntry->d_inode) {
698 cifsInode = CIFS_I(direntry->d_inode);
699 cifsInode->time = 0; /* will force revalidate to get info
701 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
704 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
705 cifsInode = CIFS_I(inode);
706 cifsInode->time = 0; /* force revalidate of dir as well */
714 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
718 struct cifs_sb_info *cifs_sb;
719 struct cifsTconInfo *pTcon;
720 char *full_path = NULL;
721 struct inode *newinode = NULL;
723 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
727 cifs_sb = CIFS_SB(inode->i_sb);
728 pTcon = cifs_sb->tcon;
730 full_path = build_path_from_dentry(direntry);
731 if (full_path == NULL) {
735 /* BB add setting the equivalent of mode via CreateX w/ACLs */
736 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
737 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
739 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
743 if (pTcon->ses->capabilities & CAP_UNIX)
744 rc = cifs_get_inode_info_unix(&newinode, full_path,
747 rc = cifs_get_inode_info(&newinode, full_path, NULL,
751 direntry->d_op = &cifs_ci_dentry_ops;
753 direntry->d_op = &cifs_dentry_ops;
754 d_instantiate(direntry, newinode);
755 if (direntry->d_inode)
756 direntry->d_inode->i_nlink = 2;
757 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
758 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
759 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
761 (__u64)current->fsuid,
762 (__u64)current->fsgid,
765 cifs_sb->mnt_cifs_flags &
766 CIFS_MOUNT_MAP_SPECIAL_CHR);
768 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
770 (__u64)-1, 0 /* dev_t */,
772 cifs_sb->mnt_cifs_flags &
773 CIFS_MOUNT_MAP_SPECIAL_CHR);
776 /* BB to be implemented via Windows secrty descriptors
777 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
778 -1, -1, local_nls); */
779 if(direntry->d_inode) {
780 direntry->d_inode->i_mode = mode;
781 direntry->d_inode->i_mode |= S_IFDIR;
782 if(cifs_sb->mnt_cifs_flags &
783 CIFS_MOUNT_SET_UID) {
784 direntry->d_inode->i_uid =
786 direntry->d_inode->i_gid =
797 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
801 struct cifs_sb_info *cifs_sb;
802 struct cifsTconInfo *pTcon;
803 char *full_path = NULL;
804 struct cifsInodeInfo *cifsInode;
806 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
810 cifs_sb = CIFS_SB(inode->i_sb);
811 pTcon = cifs_sb->tcon;
813 full_path = build_path_from_dentry(direntry);
814 if (full_path == NULL) {
819 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
820 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
824 i_size_write(direntry->d_inode,0);
825 direntry->d_inode->i_nlink = 0;
828 cifsInode = CIFS_I(direntry->d_inode);
829 cifsInode->time = 0; /* force revalidate to go get info when
831 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
832 current_fs_time(inode->i_sb);
839 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
840 struct inode *target_inode, struct dentry *target_direntry)
844 struct cifs_sb_info *cifs_sb_source;
845 struct cifs_sb_info *cifs_sb_target;
846 struct cifsTconInfo *pTcon;
852 cifs_sb_target = CIFS_SB(target_inode->i_sb);
853 cifs_sb_source = CIFS_SB(source_inode->i_sb);
854 pTcon = cifs_sb_source->tcon;
856 if (pTcon != cifs_sb_target->tcon) {
858 return -EXDEV; /* BB actually could be allowed if same server,
860 Might eventually add support for this */
863 /* we already have the rename sem so we do not need to grab it again
864 here to protect the path integrity */
865 fromName = build_path_from_dentry(source_direntry);
866 toName = build_path_from_dentry(target_direntry);
867 if ((fromName == NULL) || (toName == NULL)) {
869 goto cifs_rename_exit;
872 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
873 cifs_sb_source->local_nls,
874 cifs_sb_source->mnt_cifs_flags &
875 CIFS_MOUNT_MAP_SPECIAL_CHR);
877 /* check if they are the same file because rename of hardlinked
879 FILE_UNIX_BASIC_INFO *info_buf_source;
880 FILE_UNIX_BASIC_INFO *info_buf_target;
883 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
884 if (info_buf_source != NULL) {
885 info_buf_target = info_buf_source + 1;
886 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
887 info_buf_source, cifs_sb_source->local_nls,
888 cifs_sb_source->mnt_cifs_flags &
889 CIFS_MOUNT_MAP_SPECIAL_CHR);
891 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
893 cifs_sb_target->local_nls,
894 /* remap based on source sb */
895 cifs_sb_source->mnt_cifs_flags &
896 CIFS_MOUNT_MAP_SPECIAL_CHR);
899 (info_buf_source->UniqueId ==
900 info_buf_target->UniqueId)) {
901 /* do not rename since the files are hardlinked which
904 /* we either can not tell the files are hardlinked
905 (as with Windows servers) or files are not
906 hardlinked so delete the target manually before
907 renaming to follow POSIX rather than Windows
909 cifs_unlink(target_inode, target_direntry);
910 rc = CIFSSMBRename(xid, pTcon, fromName,
912 cifs_sb_source->local_nls,
913 cifs_sb_source->mnt_cifs_flags
914 & CIFS_MOUNT_MAP_SPECIAL_CHR);
916 kfree(info_buf_source);
917 } /* if we can not get memory just leave rc as EEXIST */
921 cFYI(1, ("rename rc %d", rc));
924 if ((rc == -EIO) || (rc == -EEXIST)) {
928 /* BB FIXME Is Generic Read correct for rename? */
929 /* if renaming directory - we should not say CREATE_NOT_DIR,
930 need to test renaming open directory, also GENERIC_READ
931 might not right be right access to request */
932 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
933 CREATE_NOT_DIR, &netfid, &oplock, NULL,
934 cifs_sb_source->local_nls,
935 cifs_sb_source->mnt_cifs_flags &
936 CIFS_MOUNT_MAP_SPECIAL_CHR);
938 CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
939 cifs_sb_source->local_nls,
940 cifs_sb_source->mnt_cifs_flags &
941 CIFS_MOUNT_MAP_SPECIAL_CHR);
942 CIFSSMBClose(xid, pTcon, netfid);
953 int cifs_revalidate(struct dentry *direntry)
958 struct cifs_sb_info *cifs_sb;
959 struct cifsInodeInfo *cifsInode;
961 struct timespec local_mtime;
962 int invalidate_inode = FALSE;
964 if (direntry->d_inode == NULL)
967 cifsInode = CIFS_I(direntry->d_inode);
969 if (cifsInode == NULL)
972 /* no sense revalidating inode info on file that no one can write */
973 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
978 cifs_sb = CIFS_SB(direntry->d_sb);
980 /* can not safely grab the rename sem here if rename calls revalidate
981 since that would deadlock */
982 full_path = build_path_from_dentry(direntry);
983 if (full_path == NULL) {
987 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
988 "jiffies %ld", full_path, direntry->d_inode,
989 direntry->d_inode->i_count.counter, direntry,
990 direntry->d_time, jiffies));
992 if (cifsInode->time == 0) {
993 /* was set to zero previously to force revalidate */
994 } else if (time_before(jiffies, cifsInode->time + HZ) &&
995 lookupCacheEnabled) {
996 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
997 (direntry->d_inode->i_nlink == 1)) {
1002 cFYI(1, ("Have to revalidate file due to hardlinks"));
1006 /* save mtime and size */
1007 local_mtime = direntry->d_inode->i_mtime;
1008 local_size = direntry->d_inode->i_size;
1010 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1011 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1012 direntry->d_sb,xid);
1014 cFYI(1, ("error on getting revalidate info %d", rc));
1015 /* if (rc != -ENOENT)
1016 rc = 0; */ /* BB should we cache info on
1020 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1021 direntry->d_sb,xid);
1023 cFYI(1, ("error on getting revalidate info %d", rc));
1024 /* if (rc != -ENOENT)
1025 rc = 0; */ /* BB should we cache info on
1029 /* should we remap certain errors, access denied?, to zero */
1031 /* if not oplocked, we invalidate inode pages if mtime or file size
1032 had changed on server */
1034 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1035 (local_size == direntry->d_inode->i_size)) {
1036 cFYI(1, ("cifs_revalidate - inode unchanged"));
1038 /* file may have changed on server */
1039 if (cifsInode->clientCanCacheRead) {
1040 /* no need to invalidate inode pages since we were the
1041 only ones who could have modified the file and the
1042 server copy is staler than ours */
1044 invalidate_inode = TRUE;
1048 /* can not grab this sem since kernel filesys locking documentation
1049 indicates i_mutex may be taken by the kernel on lookup and rename
1050 which could deadlock if we grab the i_mutex here as well */
1051 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1052 /* need to write out dirty pages here */
1053 if (direntry->d_inode->i_mapping) {
1054 /* do we need to lock inode until after invalidate completes
1056 filemap_fdatawrite(direntry->d_inode->i_mapping);
1058 if (invalidate_inode) {
1059 /* shrink_dcache not necessary now that cifs dentry ops
1060 are exported for negative dentries */
1061 /* if(S_ISDIR(direntry->d_inode->i_mode))
1062 shrink_dcache_parent(direntry); */
1063 if (S_ISREG(direntry->d_inode->i_mode)) {
1064 if (direntry->d_inode->i_mapping)
1065 filemap_fdatawait(direntry->d_inode->i_mapping);
1066 /* may eventually have to do this for open files too */
1067 if (list_empty(&(cifsInode->openFileList))) {
1068 /* changed on server - flush read ahead pages */
1069 cFYI(1, ("Invalidating read ahead data on "
1071 invalidate_remote_inode(direntry->d_inode);
1075 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1082 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1085 int err = cifs_revalidate(dentry);
1087 generic_fillattr(dentry->d_inode, stat);
1091 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1093 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1094 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1099 page = grab_cache_page(mapping, index);
1103 kaddr = kmap_atomic(page, KM_USER0);
1104 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1105 flush_dcache_page(page);
1106 kunmap_atomic(kaddr, KM_USER0);
1108 page_cache_release(page);
1112 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1115 struct cifs_sb_info *cifs_sb;
1116 struct cifsTconInfo *pTcon;
1117 char *full_path = NULL;
1119 struct cifsFileInfo *open_file = NULL;
1120 FILE_BASIC_INFO time_buf;
1121 int set_time = FALSE;
1122 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1123 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1124 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1125 struct cifsInodeInfo *cifsInode;
1129 cFYI(1, ("setattr on file %s attrs->iavalid 0x%x",
1130 direntry->d_name.name, attrs->ia_valid));
1132 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1133 pTcon = cifs_sb->tcon;
1135 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1136 /* check if we have permission to change attrs */
1137 rc = inode_change_ok(direntry->d_inode, attrs);
1145 full_path = build_path_from_dentry(direntry);
1146 if (full_path == NULL) {
1150 cifsInode = CIFS_I(direntry->d_inode);
1152 /* BB check if we need to refresh inode from server now ? BB */
1154 /* need to flush data before changing file size on server */
1155 filemap_write_and_wait(direntry->d_inode->i_mapping);
1157 if (attrs->ia_valid & ATTR_SIZE) {
1158 /* To avoid spurious oplock breaks from server, in the case of
1159 inodes that we already have open, avoid doing path based
1160 setting of file size if we can do it by handle.
1161 This keeps our caching token (oplock) and avoids timeouts
1162 when the local oplock break takes longer to flush
1163 writebehind data than the SMB timeout for the SetPathInfo
1164 request would allow */
1166 open_file = find_writable_file(cifsInode);
1168 __u16 nfid = open_file->netfid;
1169 __u32 npid = open_file->pid;
1170 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1172 atomic_dec(&open_file->wrtPending);
1173 cFYI(1,("SetFSize for attrs rc = %d", rc));
1174 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1176 rc = CIFSSMBWrite(xid, pTcon,
1177 nfid, 0, attrs->ia_size,
1178 &bytes_written, NULL, NULL,
1179 1 /* 45 seconds */);
1180 cFYI(1,("Wrt seteof rc %d", rc));
1186 /* Set file size by pathname rather than by handle
1187 either because no valid, writeable file handle for
1188 it was found or because there was an error setting
1190 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1191 attrs->ia_size, FALSE,
1193 cifs_sb->mnt_cifs_flags &
1194 CIFS_MOUNT_MAP_SPECIAL_CHR);
1195 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1196 if((rc == -EINVAL) || (rc == -EOPNOTSUPP)) {
1200 rc = SMBLegacyOpen(xid, pTcon, full_path,
1202 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1203 CREATE_NOT_DIR, &netfid, &oplock,
1204 NULL, cifs_sb->local_nls,
1205 cifs_sb->mnt_cifs_flags &
1206 CIFS_MOUNT_MAP_SPECIAL_CHR);
1209 rc = CIFSSMBWrite(xid, pTcon,
1212 &bytes_written, NULL,
1213 NULL, 1 /* 45 sec */);
1214 cFYI(1,("wrt seteof rc %d",rc));
1215 CIFSSMBClose(xid, pTcon, netfid);
1221 /* Server is ok setting allocation size implicitly - no need
1223 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1224 cifs_sb->local_nls);
1228 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1229 cifs_truncate_page(direntry->d_inode->i_mapping,
1230 direntry->d_inode->i_size);
1232 goto cifs_setattr_exit;
1234 if (attrs->ia_valid & ATTR_UID) {
1235 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1236 uid = attrs->ia_uid;
1238 if (attrs->ia_valid & ATTR_GID) {
1239 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1240 gid = attrs->ia_gid;
1243 time_buf.Attributes = 0;
1244 if (attrs->ia_valid & ATTR_MODE) {
1245 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1246 mode = attrs->ia_mode;
1249 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1250 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1251 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1252 0 /* dev_t */, cifs_sb->local_nls,
1253 cifs_sb->mnt_cifs_flags &
1254 CIFS_MOUNT_MAP_SPECIAL_CHR);
1255 else if (attrs->ia_valid & ATTR_MODE) {
1257 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1258 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1259 time_buf.Attributes =
1260 cpu_to_le32(cifsInode->cifsAttrs |
1262 } else if ((mode & S_IWUGO) == S_IWUGO) {
1263 if (cifsInode->cifsAttrs & ATTR_READONLY)
1264 time_buf.Attributes =
1265 cpu_to_le32(cifsInode->cifsAttrs &
1268 /* BB to be implemented -
1269 via Windows security descriptors or streams */
1270 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1271 cifs_sb->local_nls); */
1274 if (attrs->ia_valid & ATTR_ATIME) {
1276 time_buf.LastAccessTime =
1277 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1279 time_buf.LastAccessTime = 0;
1281 if (attrs->ia_valid & ATTR_MTIME) {
1283 time_buf.LastWriteTime =
1284 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1286 time_buf.LastWriteTime = 0;
1287 /* Do not set ctime explicitly unless other time
1288 stamps are changed explicitly (i.e. by utime()
1289 since we would then have a mix of client and
1292 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1294 /* Although Samba throws this field away
1295 it may be useful to Windows - but we do
1296 not want to set ctime unless some other
1297 timestamp is changing */
1298 cFYI(1, ("CIFS - CTIME changed"));
1299 time_buf.ChangeTime =
1300 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1302 time_buf.ChangeTime = 0;
1304 if (set_time || time_buf.Attributes) {
1305 time_buf.CreationTime = 0; /* do not change */
1306 /* In the future we should experiment - try setting timestamps
1307 via Handle (SetFileInfo) instead of by path */
1308 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1309 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1311 cifs_sb->mnt_cifs_flags &
1312 CIFS_MOUNT_MAP_SPECIAL_CHR);
1316 if (rc == -EOPNOTSUPP) {
1320 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1321 "times not supported by this server"));
1322 /* BB we could scan to see if we already have it open
1323 and pass in pid of opener to function */
1324 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1325 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1326 CREATE_NOT_DIR, &netfid, &oplock,
1327 NULL, cifs_sb->local_nls,
1328 cifs_sb->mnt_cifs_flags &
1329 CIFS_MOUNT_MAP_SPECIAL_CHR);
1331 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1333 CIFSSMBClose(xid, pTcon, netfid);
1335 /* BB For even older servers we could convert time_buf
1336 into old DOS style which uses two second
1339 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1340 &time_buf, cifs_sb->local_nls); */
1343 /* Even if error on time set, no sense failing the call if
1344 the server would set the time to a reasonable value anyway,
1345 and this check ensures that we are not being called from
1346 sys_utimes in which case we ought to fail the call back to
1347 the user when the server rejects the call */
1348 if((rc) && (attrs->ia_valid &&
1349 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1353 /* do not need local check to inode_check_ok since the server does
1356 rc = inode_setattr(direntry->d_inode, attrs);
1363 void cifs_delete_inode(struct inode *inode)
1365 cFYI(1, ("In cifs_delete_inode, inode = 0x%p", inode));
1366 /* may have to add back in if and when safe distributed caching of
1367 directories added e.g. via FindNotify */