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"));
167 ("Size %ld and blocks %ld",
168 (unsigned long) inode->i_size, 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 inode->i_data.a_ops = &cifs_addr_ops;
184 /* check if server can support readpages */
185 if(pTcon->ses->server->maxBuf <
186 4096 + MAX_CIFS_HDR_SIZE)
187 inode->i_data.a_ops->readpages = NULL;
188 } else if (S_ISDIR(inode->i_mode)) {
189 cFYI(1, ("Directory inode"));
190 inode->i_op = &cifs_dir_inode_ops;
191 inode->i_fop = &cifs_dir_ops;
192 } else if (S_ISLNK(inode->i_mode)) {
193 cFYI(1, ("Symbolic Link inode"));
194 inode->i_op = &cifs_symlink_inode_ops;
195 /* tmp_inode->i_fop = */ /* do not need to set to anything */
197 cFYI(1, ("Init special inode"));
198 init_special_inode(inode, inode->i_mode,
205 static int decode_sfu_inode(struct inode * inode, __u64 size,
206 const unsigned char *path,
207 struct cifs_sb_info *cifs_sb, int xid)
212 struct cifsTconInfo *pTcon = cifs_sb->tcon;
214 unsigned int bytes_read;
220 inode->i_mode |= S_IFIFO;
222 } else if (size < 8) {
223 return -EINVAL; /* EOPNOTSUPP? */
226 rc = CIFSSMBOpen(xid, pTcon, path, FILE_OPEN, GENERIC_READ,
227 CREATE_NOT_DIR, &netfid, &oplock, NULL,
229 cifs_sb->mnt_cifs_flags &
230 CIFS_MOUNT_MAP_SPECIAL_CHR);
232 int buf_type = CIFS_NO_BUFFER;
234 rc = CIFSSMBRead(xid, pTcon,
236 24 /* length */, 0 /* offset */,
237 &bytes_read, &pbuf, &buf_type);
238 if((rc == 0) && (bytes_read >= 8)) {
239 if(memcmp("IntxBLK", pbuf, 8) == 0) {
240 cFYI(1,("Block device"));
241 inode->i_mode |= S_IFBLK;
242 if(bytes_read == 24) {
243 /* we have enough to decode dev num */
244 __u64 mjr; /* major */
245 __u64 mnr; /* minor */
246 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
247 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
248 inode->i_rdev = MKDEV(mjr, mnr);
250 } else if(memcmp("IntxCHR", pbuf, 8) == 0) {
251 cFYI(1,("Char device"));
252 inode->i_mode |= S_IFCHR;
253 if(bytes_read == 24) {
254 /* we have enough to decode dev num */
255 __u64 mjr; /* major */
256 __u64 mnr; /* minor */
257 mjr = le64_to_cpu(*(__le64 *)(pbuf+8));
258 mnr = le64_to_cpu(*(__le64 *)(pbuf+16));
259 inode->i_rdev = MKDEV(mjr, mnr);
261 } else if(memcmp("IntxLNK", pbuf, 7) == 0) {
263 inode->i_mode |= S_IFLNK;
265 inode->i_mode |= S_IFREG; /* file? */
269 inode->i_mode |= S_IFREG; /* then it is a file */
270 rc = -EOPNOTSUPP; /* or some unknown SFU type */
272 CIFSSMBClose(xid, pTcon, netfid);
278 #define SFBITS_MASK (S_ISVTX | S_ISGID | S_ISUID) /* SETFILEBITS valid bits */
280 static int get_sfu_uid_mode(struct inode * inode,
281 const unsigned char *path,
282 struct cifs_sb_info *cifs_sb, int xid)
284 #ifdef CONFIG_CIFS_XATTR
289 rc = CIFSSMBQueryEA(xid, cifs_sb->tcon, path, "SETFILEBITS",
290 ea_value, 4 /* size of buf */, cifs_sb->local_nls,
291 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
295 mode = le32_to_cpu(*((__le32 *)ea_value));
296 inode->i_mode &= ~SFBITS_MASK;
297 cFYI(1,("special bits 0%o org mode 0%o", mode, inode->i_mode));
298 inode->i_mode = (mode & SFBITS_MASK) | inode->i_mode;
299 cFYI(1,("special mode bits 0%o", mode));
311 int cifs_get_inode_info(struct inode **pinode,
312 const unsigned char *search_path, FILE_ALL_INFO *pfindData,
313 struct super_block *sb, int xid)
316 struct cifsTconInfo *pTcon;
318 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
322 pTcon = cifs_sb->tcon;
323 cFYI(1,("Getting info on %s", search_path));
325 if ((pfindData == NULL) && (*pinode != NULL)) {
326 if (CIFS_I(*pinode)->clientCanCacheRead) {
327 cFYI(1,("No need to revalidate cached inode sizes"));
332 /* if file info not passed in then get it from server */
333 if (pfindData == NULL) {
334 buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
337 pfindData = (FILE_ALL_INFO *)buf;
338 /* could do find first instead but this returns more info */
339 rc = CIFSSMBQPathInfo(xid, pTcon, search_path, pfindData,
340 cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
341 CIFS_MOUNT_MAP_SPECIAL_CHR);
342 /* BB optimize code so we do not make the above call
343 when server claims no NT SMB support and the above call
344 failed at least once - set flag in tcon or mount */
345 if((rc == -EOPNOTSUPP) || (rc == -EINVAL)) {
346 rc = SMBQueryInformation(xid, pTcon, search_path,
347 pfindData, cifs_sb->local_nls,
348 cifs_sb->mnt_cifs_flags &
349 CIFS_MOUNT_MAP_SPECIAL_CHR);
353 /* dump_mem("\nQPathInfo return data",&findData, sizeof(findData)); */
355 if (rc == -EREMOTE) {
360 strnlen(search_path, MAX_PATHCONF) + 1,
362 if (tmp_path == NULL) {
367 strncpy(tmp_path, pTcon->treeName, MAX_TREE_SIZE);
368 strncat(tmp_path, search_path, MAX_PATHCONF);
369 rc = connect_to_dfs_path(xid, pTcon->ses,
370 /* treename + */ tmp_path,
372 cifs_sb->mnt_cifs_flags &
373 CIFS_MOUNT_MAP_SPECIAL_CHR);
375 /* BB fix up inode etc. */
381 struct cifsInodeInfo *cifsInfo;
382 __u32 attr = le32_to_cpu(pfindData->Attributes);
385 if (*pinode == NULL) {
386 *pinode = new_inode(sb);
389 /* Is an i_ino of zero legal? Can we use that to check
390 if the server supports returning inode numbers? Are
391 there other sanity checks we can use to ensure that
392 the server is really filling in that field? */
394 /* We can not use the IndexNumber field by default from
395 Windows or Samba (in ALL_INFO buf) but we can request
396 it explicitly. It may not be unique presumably if
397 the server has multiple devices mounted under one
400 /* There may be higher info levels that work but are
401 there Windows server or network appliances for which
402 IndexNumber field is not guaranteed unique? */
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM){
408 rc1 = CIFSGetSrvInodeNumber(xid, pTcon,
409 search_path, &inode_num,
411 cifs_sb->mnt_cifs_flags &
412 CIFS_MOUNT_MAP_SPECIAL_CHR);
414 cFYI(1,("GetSrvInodeNum rc %d", rc1));
415 /* BB EOPNOSUPP disable SERVER_INUM? */
416 } else /* do we need cast or hash to ino? */
417 (*pinode)->i_ino = inode_num;
418 } /* else ino incremented to unique num in new_inode*/
419 insert_inode_hash(*pinode);
422 cifsInfo = CIFS_I(inode);
423 cifsInfo->cifsAttrs = attr;
424 cFYI(1, ("Old time %ld ", cifsInfo->time));
425 cifsInfo->time = jiffies;
426 cFYI(1, ("New time %ld ", cifsInfo->time));
428 /* blksize needs to be multiple of two. So safer to default to
429 blksize and blkbits set in superblock so 2**blkbits and blksize
430 will match rather than setting to:
431 (pTcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE) & 0xFFFFFE00;*/
433 /* Linux can not store file creation time unfortunately so we ignore it */
435 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
437 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
439 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
440 cFYI(0, ("Attributes came in as 0x%x ", attr));
442 /* set default mode. will override for dirs below */
443 if (atomic_read(&cifsInfo->inUse) == 0)
444 /* new inode, can safely set these fields */
445 inode->i_mode = cifs_sb->mnt_file_mode;
446 else /* since we set the inode type below we need to mask off
447 to avoid strange results if type changes and both get orred in */
448 inode->i_mode &= ~S_IFMT;
449 /* if (attr & ATTR_REPARSE) */
450 /* We no longer handle these as symlinks because we could not
451 follow them due to the absolute path with drive letter */
452 if (attr & ATTR_DIRECTORY) {
453 /* override default perms since we do not do byte range locking
455 inode->i_mode = cifs_sb->mnt_dir_mode;
456 inode->i_mode |= S_IFDIR;
457 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
458 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
459 /* No need to le64 convert size of zero */
460 (pfindData->EndOfFile == 0)) {
461 inode->i_mode = cifs_sb->mnt_file_mode;
462 inode->i_mode |= S_IFIFO;
463 /* BB Finish for SFU style symlinks and devices */
464 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
465 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
466 if (decode_sfu_inode(inode,
467 le64_to_cpu(pfindData->EndOfFile),
470 cFYI(1,("Unrecognized sfu inode type"));
472 cFYI(1,("sfu mode 0%o",inode->i_mode));
474 inode->i_mode |= S_IFREG;
475 /* treat the dos attribute of read-only as read-only
477 if (cifsInfo->cifsAttrs & ATTR_READONLY)
478 inode->i_mode &= ~(S_IWUGO);
479 /* BB add code here -
480 validate if device or weird share or device type? */
482 if (is_size_safe_to_change(cifsInfo)) {
483 /* can not safely change the file size here if the
484 client is writing to it due to potential races */
485 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
487 /* 512 bytes (2**9) is the fake blocksize that must be
488 used for this calculation */
489 inode->i_blocks = (512 - 1 + le64_to_cpu(
490 pfindData->AllocationSize)) >> 9;
493 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
495 /* BB fill in uid and gid here? with help from winbind?
496 or retrieve from NTFS stream extended attribute */
497 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
498 /* fill in uid, gid, mode from server ACL */
499 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
500 } else if (atomic_read(&cifsInfo->inUse) == 0) {
501 inode->i_uid = cifs_sb->mnt_uid;
502 inode->i_gid = cifs_sb->mnt_gid;
503 /* set so we do not keep refreshing these fields with
504 bad data after user has changed them in memory */
505 atomic_set(&cifsInfo->inUse,1);
508 if (S_ISREG(inode->i_mode)) {
509 cFYI(1, ("File inode"));
510 inode->i_op = &cifs_file_inode_ops;
511 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
514 &cifs_file_direct_nobrl_ops;
516 inode->i_fop = &cifs_file_direct_ops;
517 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
518 inode->i_fop = &cifs_file_nobrl_ops;
519 else /* not direct, send byte range locks */
520 inode->i_fop = &cifs_file_ops;
522 inode->i_data.a_ops = &cifs_addr_ops;
523 if(pTcon->ses->server->maxBuf <
524 4096 + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops->readpages = NULL;
526 } else if (S_ISDIR(inode->i_mode)) {
527 cFYI(1, ("Directory inode"));
528 inode->i_op = &cifs_dir_inode_ops;
529 inode->i_fop = &cifs_dir_ops;
530 } else if (S_ISLNK(inode->i_mode)) {
531 cFYI(1, ("Symbolic Link inode"));
532 inode->i_op = &cifs_symlink_inode_ops;
534 init_special_inode(inode, inode->i_mode,
542 /* gets root inode */
543 void cifs_read_inode(struct inode *inode)
546 struct cifs_sb_info *cifs_sb;
548 cifs_sb = CIFS_SB(inode->i_sb);
550 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
551 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
553 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
554 /* can not call macro FreeXid here since in a void func */
558 int cifs_unlink(struct inode *inode, struct dentry *direntry)
562 struct cifs_sb_info *cifs_sb;
563 struct cifsTconInfo *pTcon;
564 char *full_path = NULL;
565 struct cifsInodeInfo *cifsInode;
566 FILE_BASIC_INFO *pinfo_buf;
568 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
573 cifs_sb = CIFS_SB(inode->i_sb);
575 cifs_sb = CIFS_SB(direntry->d_sb);
576 pTcon = cifs_sb->tcon;
578 /* Unlink can be called from rename so we can not grab the sem here
579 since we deadlock otherwise */
580 /* down(&direntry->d_sb->s_vfs_rename_sem);*/
581 full_path = build_path_from_dentry(direntry);
582 /* up(&direntry->d_sb->s_vfs_rename_sem);*/
583 if (full_path == NULL) {
587 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
588 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
591 if (direntry->d_inode)
592 direntry->d_inode->i_nlink--;
593 } else if (rc == -ENOENT) {
595 } else if (rc == -ETXTBSY) {
599 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
600 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
601 &netfid, &oplock, NULL, cifs_sb->local_nls,
602 cifs_sb->mnt_cifs_flags &
603 CIFS_MOUNT_MAP_SPECIAL_CHR);
605 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
607 cifs_sb->mnt_cifs_flags &
608 CIFS_MOUNT_MAP_SPECIAL_CHR);
609 CIFSSMBClose(xid, pTcon, netfid);
610 if (direntry->d_inode)
611 direntry->d_inode->i_nlink--;
613 } else if (rc == -EACCES) {
614 /* try only if r/o attribute set in local lookup data? */
615 pinfo_buf = kmalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
617 memset(pinfo_buf, 0, sizeof(FILE_BASIC_INFO));
618 /* ATTRS set to normal clears r/o bit */
619 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
620 if (!(pTcon->ses->flags & CIFS_SES_NT4))
621 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
624 cifs_sb->mnt_cifs_flags &
625 CIFS_MOUNT_MAP_SPECIAL_CHR);
629 if (rc == -EOPNOTSUPP) {
632 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
636 For some strange reason it seems that NT4 eats the
637 old setattr call without actually setting the
638 attributes so on to the third attempted workaround
641 /* BB could scan to see if we already have it open
642 and pass in pid of opener to function */
643 rc = CIFSSMBOpen(xid, pTcon, full_path,
644 FILE_OPEN, SYNCHRONIZE |
645 FILE_WRITE_ATTRIBUTES, 0,
646 &netfid, &oplock, NULL,
648 cifs_sb->mnt_cifs_flags &
649 CIFS_MOUNT_MAP_SPECIAL_CHR);
651 rc = CIFSSMBSetFileTimes(xid, pTcon,
654 CIFSSMBClose(xid, pTcon, netfid);
660 rc = CIFSSMBDelFile(xid, pTcon, full_path,
662 cifs_sb->mnt_cifs_flags &
663 CIFS_MOUNT_MAP_SPECIAL_CHR);
665 if (direntry->d_inode)
666 direntry->d_inode->i_nlink--;
667 } else if (rc == -ETXTBSY) {
671 rc = CIFSSMBOpen(xid, pTcon, full_path,
674 CREATE_DELETE_ON_CLOSE,
675 &netfid, &oplock, NULL,
677 cifs_sb->mnt_cifs_flags &
678 CIFS_MOUNT_MAP_SPECIAL_CHR);
680 CIFSSMBRenameOpenFile(xid, pTcon,
683 cifs_sb->mnt_cifs_flags &
684 CIFS_MOUNT_MAP_SPECIAL_CHR);
685 CIFSSMBClose(xid, pTcon, netfid);
686 if (direntry->d_inode)
687 direntry->d_inode->i_nlink--;
689 /* BB if rc = -ETXTBUSY goto the rename logic BB */
693 if (direntry->d_inode) {
694 cifsInode = CIFS_I(direntry->d_inode);
695 cifsInode->time = 0; /* will force revalidate to get info
697 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
700 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
701 cifsInode = CIFS_I(inode);
702 cifsInode->time = 0; /* force revalidate of dir as well */
710 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
714 struct cifs_sb_info *cifs_sb;
715 struct cifsTconInfo *pTcon;
716 char *full_path = NULL;
717 struct inode *newinode = NULL;
719 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
723 cifs_sb = CIFS_SB(inode->i_sb);
724 pTcon = cifs_sb->tcon;
726 down(&inode->i_sb->s_vfs_rename_sem);
727 full_path = build_path_from_dentry(direntry);
728 up(&inode->i_sb->s_vfs_rename_sem);
729 if (full_path == NULL) {
733 /* BB add setting the equivalent of mode via CreateX w/ACLs */
734 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
735 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
737 cFYI(1, ("cifs_mkdir returned 0x%x ", rc));
741 if (pTcon->ses->capabilities & CAP_UNIX)
742 rc = cifs_get_inode_info_unix(&newinode, full_path,
745 rc = cifs_get_inode_info(&newinode, full_path, NULL,
749 direntry->d_op = &cifs_ci_dentry_ops;
751 direntry->d_op = &cifs_dentry_ops;
752 d_instantiate(direntry, newinode);
753 if (direntry->d_inode)
754 direntry->d_inode->i_nlink = 2;
755 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
756 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
757 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
759 (__u64)current->fsuid,
760 (__u64)current->fsgid,
763 cifs_sb->mnt_cifs_flags &
764 CIFS_MOUNT_MAP_SPECIAL_CHR);
766 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
768 (__u64)-1, 0 /* dev_t */,
770 cifs_sb->mnt_cifs_flags &
771 CIFS_MOUNT_MAP_SPECIAL_CHR);
774 /* BB to be implemented via Windows secrty descriptors
775 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
776 -1, -1, local_nls); */
777 if(direntry->d_inode) {
778 direntry->d_inode->i_mode = mode;
779 direntry->d_inode->i_mode |= S_IFDIR;
780 if(cifs_sb->mnt_cifs_flags &
781 CIFS_MOUNT_SET_UID) {
782 direntry->d_inode->i_uid =
784 direntry->d_inode->i_gid =
795 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
799 struct cifs_sb_info *cifs_sb;
800 struct cifsTconInfo *pTcon;
801 char *full_path = NULL;
802 struct cifsInodeInfo *cifsInode;
804 cFYI(1, ("cifs_rmdir, inode = 0x%p with ", inode));
808 cifs_sb = CIFS_SB(inode->i_sb);
809 pTcon = cifs_sb->tcon;
811 down(&inode->i_sb->s_vfs_rename_sem);
812 full_path = build_path_from_dentry(direntry);
813 up(&inode->i_sb->s_vfs_rename_sem);
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 if (pTcon->ses->capabilities & CAP_UNIX)
887 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
889 cifs_sb_source->local_nls,
890 cifs_sb_source->mnt_cifs_flags &
891 CIFS_MOUNT_MAP_SPECIAL_CHR);
892 /* else rc is still EEXIST so will fall through to
893 unlink the target and retry rename */
895 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
897 cifs_sb_target->local_nls,
898 /* remap based on source sb */
899 cifs_sb_source->mnt_cifs_flags &
900 CIFS_MOUNT_MAP_SPECIAL_CHR);
903 (info_buf_source->UniqueId ==
904 info_buf_target->UniqueId)) {
905 /* do not rename since the files are hardlinked which
908 /* we either can not tell the files are hardlinked
909 (as with Windows servers) or files are not
910 hardlinked so delete the target manually before
911 renaming to follow POSIX rather than Windows
913 cifs_unlink(target_inode, target_direntry);
914 rc = CIFSSMBRename(xid, pTcon, fromName,
916 cifs_sb_source->local_nls,
917 cifs_sb_source->mnt_cifs_flags
918 & CIFS_MOUNT_MAP_SPECIAL_CHR);
920 kfree(info_buf_source);
921 } /* if we can not get memory just leave rc as EEXIST */
925 cFYI(1, ("rename rc %d", rc));
928 if ((rc == -EIO) || (rc == -EEXIST)) {
932 /* BB FIXME Is Generic Read correct for rename? */
933 /* if renaming directory - we should not say CREATE_NOT_DIR,
934 need to test renaming open directory, also GENERIC_READ
935 might not right be right access to request */
936 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
937 CREATE_NOT_DIR, &netfid, &oplock, NULL,
938 cifs_sb_source->local_nls,
939 cifs_sb_source->mnt_cifs_flags &
940 CIFS_MOUNT_MAP_SPECIAL_CHR);
942 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
943 cifs_sb_source->local_nls,
944 cifs_sb_source->mnt_cifs_flags &
945 CIFS_MOUNT_MAP_SPECIAL_CHR);
946 CIFSSMBClose(xid, pTcon, netfid);
957 int cifs_revalidate(struct dentry *direntry)
962 struct cifs_sb_info *cifs_sb;
963 struct cifsInodeInfo *cifsInode;
965 struct timespec local_mtime;
966 int invalidate_inode = FALSE;
968 if (direntry->d_inode == NULL)
971 cifsInode = CIFS_I(direntry->d_inode);
973 if (cifsInode == NULL)
976 /* no sense revalidating inode info on file that no one can write */
977 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
982 cifs_sb = CIFS_SB(direntry->d_sb);
984 /* can not safely grab the rename sem here if rename calls revalidate
985 since that would deadlock */
986 full_path = build_path_from_dentry(direntry);
987 if (full_path == NULL) {
991 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
992 "jiffies %ld", full_path, direntry->d_inode,
993 direntry->d_inode->i_count.counter, direntry,
994 direntry->d_time, jiffies));
996 if (cifsInode->time == 0) {
997 /* was set to zero previously to force revalidate */
998 } else if (time_before(jiffies, cifsInode->time + HZ) &&
999 lookupCacheEnabled) {
1000 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
1001 (direntry->d_inode->i_nlink == 1)) {
1006 cFYI(1, ("Have to revalidate file due to hardlinks"));
1010 /* save mtime and size */
1011 local_mtime = direntry->d_inode->i_mtime;
1012 local_size = direntry->d_inode->i_size;
1014 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1015 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1016 direntry->d_sb,xid);
1018 cFYI(1, ("error on getting revalidate info %d", rc));
1019 /* if (rc != -ENOENT)
1020 rc = 0; */ /* BB should we cache info on
1024 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1025 direntry->d_sb,xid);
1027 cFYI(1, ("error on getting revalidate info %d", rc));
1028 /* if (rc != -ENOENT)
1029 rc = 0; */ /* BB should we cache info on
1033 /* should we remap certain errors, access denied?, to zero */
1035 /* if not oplocked, we invalidate inode pages if mtime or file size
1036 had changed on server */
1038 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1039 (local_size == direntry->d_inode->i_size)) {
1040 cFYI(1, ("cifs_revalidate - inode unchanged"));
1042 /* file may have changed on server */
1043 if (cifsInode->clientCanCacheRead) {
1044 /* no need to invalidate inode pages since we were the
1045 only ones who could have modified the file and the
1046 server copy is staler than ours */
1048 invalidate_inode = TRUE;
1052 /* can not grab this sem since kernel filesys locking documentation
1053 indicates i_mutex may be taken by the kernel on lookup and rename
1054 which could deadlock if we grab the i_mutex here as well */
1055 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1056 /* need to write out dirty pages here */
1057 if (direntry->d_inode->i_mapping) {
1058 /* do we need to lock inode until after invalidate completes
1060 filemap_fdatawrite(direntry->d_inode->i_mapping);
1062 if (invalidate_inode) {
1063 /* shrink_dcache not necessary now that cifs dentry ops
1064 are exported for negative dentries */
1065 /* if(S_ISDIR(direntry->d_inode->i_mode))
1066 shrink_dcache_parent(direntry); */
1067 if (S_ISREG(direntry->d_inode->i_mode)) {
1068 if (direntry->d_inode->i_mapping)
1069 filemap_fdatawait(direntry->d_inode->i_mapping);
1070 /* may eventually have to do this for open files too */
1071 if (list_empty(&(cifsInode->openFileList))) {
1072 /* changed on server - flush read ahead pages */
1073 cFYI(1, ("Invalidating read ahead data on "
1075 invalidate_remote_inode(direntry->d_inode);
1079 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1086 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1089 int err = cifs_revalidate(dentry);
1091 generic_fillattr(dentry->d_inode, stat);
1095 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
1097 pgoff_t index = from >> PAGE_CACHE_SHIFT;
1098 unsigned offset = from & (PAGE_CACHE_SIZE - 1);
1103 page = grab_cache_page(mapping, index);
1107 kaddr = kmap_atomic(page, KM_USER0);
1108 memset(kaddr + offset, 0, PAGE_CACHE_SIZE - offset);
1109 flush_dcache_page(page);
1110 kunmap_atomic(kaddr, KM_USER0);
1112 page_cache_release(page);
1116 int cifs_setattr(struct dentry *direntry, struct iattr *attrs)
1119 struct cifs_sb_info *cifs_sb;
1120 struct cifsTconInfo *pTcon;
1121 char *full_path = NULL;
1123 struct cifsFileInfo *open_file = NULL;
1124 FILE_BASIC_INFO time_buf;
1125 int set_time = FALSE;
1126 __u64 mode = 0xFFFFFFFFFFFFFFFFULL;
1127 __u64 uid = 0xFFFFFFFFFFFFFFFFULL;
1128 __u64 gid = 0xFFFFFFFFFFFFFFFFULL;
1129 struct cifsInodeInfo *cifsInode;
1133 cFYI(1, ("In cifs_setattr, name = %s attrs->iavalid 0x%x ",
1134 direntry->d_name.name, attrs->ia_valid));
1136 cifs_sb = CIFS_SB(direntry->d_inode->i_sb);
1137 pTcon = cifs_sb->tcon;
1139 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) == 0) {
1140 /* check if we have permission to change attrs */
1141 rc = inode_change_ok(direntry->d_inode, attrs);
1149 down(&direntry->d_sb->s_vfs_rename_sem);
1150 full_path = build_path_from_dentry(direntry);
1151 up(&direntry->d_sb->s_vfs_rename_sem);
1152 if (full_path == NULL) {
1156 cifsInode = CIFS_I(direntry->d_inode);
1158 /* BB check if we need to refresh inode from server now ? BB */
1160 /* need to flush data before changing file size on server */
1161 filemap_write_and_wait(direntry->d_inode->i_mapping);
1163 if (attrs->ia_valid & ATTR_SIZE) {
1164 /* To avoid spurious oplock breaks from server, in the case of
1165 inodes that we already have open, avoid doing path based
1166 setting of file size if we can do it by handle.
1167 This keeps our caching token (oplock) and avoids timeouts
1168 when the local oplock break takes longer to flush
1169 writebehind data than the SMB timeout for the SetPathInfo
1170 request would allow */
1171 open_file = find_writable_file(cifsInode);
1173 __u16 nfid = open_file->netfid;
1174 __u32 npid = open_file->pid;
1175 rc = CIFSSMBSetFileSize(xid, pTcon, attrs->ia_size,
1177 atomic_dec(&open_file->wrtPending);
1178 cFYI(1,("SetFSize for attrs rc = %d", rc));
1181 rc = CIFSSMBWrite(xid, pTcon,
1182 nfid, 0, attrs->ia_size,
1183 &bytes_written, NULL, NULL,
1184 1 /* 45 seconds */);
1185 cFYI(1,("Wrt seteof rc %d", rc));
1191 /* Set file size by pathname rather than by handle
1192 either because no valid, writeable file handle for
1193 it was found or because there was an error setting
1195 rc = CIFSSMBSetEOF(xid, pTcon, full_path,
1196 attrs->ia_size, FALSE,
1198 cifs_sb->mnt_cifs_flags &
1199 CIFS_MOUNT_MAP_SPECIAL_CHR);
1200 cFYI(1, ("SetEOF by path (setattrs) rc = %d", rc));
1205 rc = SMBLegacyOpen(xid, pTcon, full_path,
1207 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1208 CREATE_NOT_DIR, &netfid, &oplock,
1209 NULL, cifs_sb->local_nls,
1210 cifs_sb->mnt_cifs_flags &
1211 CIFS_MOUNT_MAP_SPECIAL_CHR);
1214 rc = CIFSSMBWrite(xid, pTcon,
1217 &bytes_written, NULL,
1218 NULL, 1 /* 45 sec */);
1219 cFYI(1,("wrt seteof rc %d",rc));
1220 CIFSSMBClose(xid, pTcon, netfid);
1226 /* Server is ok setting allocation size implicitly - no need
1228 CIFSSMBSetEOF(xid, pTcon, full_path, attrs->ia_size, TRUE,
1229 cifs_sb->local_nls);
1233 rc = vmtruncate(direntry->d_inode, attrs->ia_size);
1234 cifs_truncate_page(direntry->d_inode->i_mapping,
1235 direntry->d_inode->i_size);
1237 goto cifs_setattr_exit;
1239 if (attrs->ia_valid & ATTR_UID) {
1240 cFYI(1, ("UID changed to %d", attrs->ia_uid));
1241 uid = attrs->ia_uid;
1243 if (attrs->ia_valid & ATTR_GID) {
1244 cFYI(1, ("GID changed to %d", attrs->ia_gid));
1245 gid = attrs->ia_gid;
1248 time_buf.Attributes = 0;
1249 if (attrs->ia_valid & ATTR_MODE) {
1250 cFYI(1, ("Mode changed to 0x%x", attrs->ia_mode));
1251 mode = attrs->ia_mode;
1254 if ((cifs_sb->tcon->ses->capabilities & CAP_UNIX)
1255 && (attrs->ia_valid & (ATTR_MODE | ATTR_GID | ATTR_UID)))
1256 rc = CIFSSMBUnixSetPerms(xid, pTcon, full_path, mode, uid, gid,
1257 0 /* dev_t */, cifs_sb->local_nls,
1258 cifs_sb->mnt_cifs_flags &
1259 CIFS_MOUNT_MAP_SPECIAL_CHR);
1260 else if (attrs->ia_valid & ATTR_MODE) {
1262 if ((mode & S_IWUGO) == 0) /* not writeable */ {
1263 if ((cifsInode->cifsAttrs & ATTR_READONLY) == 0)
1264 time_buf.Attributes =
1265 cpu_to_le32(cifsInode->cifsAttrs |
1267 } else if ((mode & S_IWUGO) == S_IWUGO) {
1268 if (cifsInode->cifsAttrs & ATTR_READONLY)
1269 time_buf.Attributes =
1270 cpu_to_le32(cifsInode->cifsAttrs &
1273 /* BB to be implemented -
1274 via Windows security descriptors or streams */
1275 /* CIFSSMBWinSetPerms(xid, pTcon, full_path, mode, uid, gid,
1276 cifs_sb->local_nls); */
1279 if (attrs->ia_valid & ATTR_ATIME) {
1281 time_buf.LastAccessTime =
1282 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_atime));
1284 time_buf.LastAccessTime = 0;
1286 if (attrs->ia_valid & ATTR_MTIME) {
1288 time_buf.LastWriteTime =
1289 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_mtime));
1291 time_buf.LastWriteTime = 0;
1292 /* Do not set ctime explicitly unless other time
1293 stamps are changed explicitly (i.e. by utime()
1294 since we would then have a mix of client and
1297 if (set_time && (attrs->ia_valid & ATTR_CTIME)) {
1299 /* Although Samba throws this field away
1300 it may be useful to Windows - but we do
1301 not want to set ctime unless some other
1302 timestamp is changing */
1303 cFYI(1, ("CIFS - CTIME changed "));
1304 time_buf.ChangeTime =
1305 cpu_to_le64(cifs_UnixTimeToNT(attrs->ia_ctime));
1307 time_buf.ChangeTime = 0;
1309 if (set_time || time_buf.Attributes) {
1310 time_buf.CreationTime = 0; /* do not change */
1311 /* In the future we should experiment - try setting timestamps
1312 via Handle (SetFileInfo) instead of by path */
1313 if (!(pTcon->ses->flags & CIFS_SES_NT4))
1314 rc = CIFSSMBSetTimes(xid, pTcon, full_path, &time_buf,
1316 cifs_sb->mnt_cifs_flags &
1317 CIFS_MOUNT_MAP_SPECIAL_CHR);
1321 if (rc == -EOPNOTSUPP) {
1325 cFYI(1, ("calling SetFileInfo since SetPathInfo for "
1326 "times not supported by this server"));
1327 /* BB we could scan to see if we already have it open
1328 and pass in pid of opener to function */
1329 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN,
1330 SYNCHRONIZE | FILE_WRITE_ATTRIBUTES,
1331 CREATE_NOT_DIR, &netfid, &oplock,
1332 NULL, cifs_sb->local_nls,
1333 cifs_sb->mnt_cifs_flags &
1334 CIFS_MOUNT_MAP_SPECIAL_CHR);
1336 rc = CIFSSMBSetFileTimes(xid, pTcon, &time_buf,
1338 CIFSSMBClose(xid, pTcon, netfid);
1340 /* BB For even older servers we could convert time_buf
1341 into old DOS style which uses two second
1344 /* rc = CIFSSMBSetTimesLegacy(xid, pTcon, full_path,
1345 &time_buf, cifs_sb->local_nls); */
1348 /* Even if error on time set, no sense failing the call if
1349 the server would set the time to a reasonable value anyway,
1350 and this check ensures that we are not being called from
1351 sys_utimes in which case we ought to fail the call back to
1352 the user when the server rejects the call */
1353 if((rc) && (attrs->ia_valid &&
1354 (ATTR_MODE | ATTR_GID | ATTR_UID | ATTR_SIZE)))
1358 /* do not need local check to inode_check_ok since the server does
1361 rc = inode_setattr(direntry->d_inode, attrs);
1368 void cifs_delete_inode(struct inode *inode)
1370 cFYI(1, ("In cifs_delete_inode, inode = 0x%p ", inode));
1371 /* may have to add back in if and when safe distributed caching of
1372 directories added e.g. via FindNotify */