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 */
436 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
438 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
440 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
441 cFYI(0, ("Attributes came in as 0x%x", attr));
443 /* set default mode. will override for dirs below */
444 if (atomic_read(&cifsInfo->inUse) == 0)
445 /* new inode, can safely set these fields */
446 inode->i_mode = cifs_sb->mnt_file_mode;
447 else /* since we set the inode type below we need to mask off
448 to avoid strange results if type changes and both get orred in */
449 inode->i_mode &= ~S_IFMT;
450 /* if (attr & ATTR_REPARSE) */
451 /* We no longer handle these as symlinks because we could not
452 follow them due to the absolute path with drive letter */
453 if (attr & ATTR_DIRECTORY) {
454 /* override default perms since we do not do byte range locking
456 inode->i_mode = cifs_sb->mnt_dir_mode;
457 inode->i_mode |= S_IFDIR;
458 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
459 (cifsInfo->cifsAttrs & ATTR_SYSTEM) &&
460 /* No need to le64 convert size of zero */
461 (pfindData->EndOfFile == 0)) {
462 inode->i_mode = cifs_sb->mnt_file_mode;
463 inode->i_mode |= S_IFIFO;
464 /* BB Finish for SFU style symlinks and devices */
465 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
466 (cifsInfo->cifsAttrs & ATTR_SYSTEM)) {
467 if (decode_sfu_inode(inode,
468 le64_to_cpu(pfindData->EndOfFile),
471 cFYI(1,("Unrecognized sfu inode type"));
473 cFYI(1,("sfu mode 0%o",inode->i_mode));
475 inode->i_mode |= S_IFREG;
476 /* treat the dos attribute of read-only as read-only
478 if (cifsInfo->cifsAttrs & ATTR_READONLY)
479 inode->i_mode &= ~(S_IWUGO);
480 /* BB add code here -
481 validate if device or weird share or device type? */
483 if (is_size_safe_to_change(cifsInfo)) {
484 /* can not safely change the file size here if the
485 client is writing to it due to potential races */
486 i_size_write(inode,le64_to_cpu(pfindData->EndOfFile));
488 /* 512 bytes (2**9) is the fake blocksize that must be
489 used for this calculation */
490 inode->i_blocks = (512 - 1 + le64_to_cpu(
491 pfindData->AllocationSize)) >> 9;
494 inode->i_nlink = le32_to_cpu(pfindData->NumberOfLinks);
496 /* BB fill in uid and gid here? with help from winbind?
497 or retrieve from NTFS stream extended attribute */
498 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) {
499 /* fill in uid, gid, mode from server ACL */
500 get_sfu_uid_mode(inode, search_path, cifs_sb, xid);
501 } else if (atomic_read(&cifsInfo->inUse) == 0) {
502 inode->i_uid = cifs_sb->mnt_uid;
503 inode->i_gid = cifs_sb->mnt_gid;
504 /* set so we do not keep refreshing these fields with
505 bad data after user has changed them in memory */
506 atomic_set(&cifsInfo->inUse,1);
509 if (S_ISREG(inode->i_mode)) {
510 cFYI(1, ("File inode"));
511 inode->i_op = &cifs_file_inode_ops;
512 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
513 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
515 &cifs_file_direct_nobrl_ops;
517 inode->i_fop = &cifs_file_direct_ops;
518 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
519 inode->i_fop = &cifs_file_nobrl_ops;
520 else /* not direct, send byte range locks */
521 inode->i_fop = &cifs_file_ops;
523 if(pTcon->ses->server->maxBuf <
524 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)
525 inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
527 inode->i_data.a_ops = &cifs_addr_ops;
528 } else if (S_ISDIR(inode->i_mode)) {
529 cFYI(1, ("Directory inode"));
530 inode->i_op = &cifs_dir_inode_ops;
531 inode->i_fop = &cifs_dir_ops;
532 } else if (S_ISLNK(inode->i_mode)) {
533 cFYI(1, ("Symbolic Link inode"));
534 inode->i_op = &cifs_symlink_inode_ops;
536 init_special_inode(inode, inode->i_mode,
544 /* gets root inode */
545 void cifs_read_inode(struct inode *inode)
548 struct cifs_sb_info *cifs_sb;
550 cifs_sb = CIFS_SB(inode->i_sb);
552 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
553 cifs_get_inode_info_unix(&inode, "", inode->i_sb,xid);
555 cifs_get_inode_info(&inode, "", NULL, inode->i_sb,xid);
556 /* can not call macro FreeXid here since in a void func */
560 int cifs_unlink(struct inode *inode, struct dentry *direntry)
564 struct cifs_sb_info *cifs_sb;
565 struct cifsTconInfo *pTcon;
566 char *full_path = NULL;
567 struct cifsInodeInfo *cifsInode;
568 FILE_BASIC_INFO *pinfo_buf;
570 cFYI(1, ("cifs_unlink, inode = 0x%p", inode));
575 cifs_sb = CIFS_SB(inode->i_sb);
577 cifs_sb = CIFS_SB(direntry->d_sb);
578 pTcon = cifs_sb->tcon;
580 /* Unlink can be called from rename so we can not grab the sem here
581 since we deadlock otherwise */
582 /* mutex_lock(&direntry->d_sb->s_vfs_rename_mutex);*/
583 full_path = build_path_from_dentry(direntry);
584 /* mutex_unlock(&direntry->d_sb->s_vfs_rename_mutex);*/
585 if (full_path == NULL) {
589 rc = CIFSSMBDelFile(xid, pTcon, full_path, cifs_sb->local_nls,
590 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
593 if (direntry->d_inode)
594 direntry->d_inode->i_nlink--;
595 } else if (rc == -ENOENT) {
597 } else if (rc == -ETXTBSY) {
601 rc = CIFSSMBOpen(xid, pTcon, full_path, FILE_OPEN, DELETE,
602 CREATE_NOT_DIR | CREATE_DELETE_ON_CLOSE,
603 &netfid, &oplock, NULL, cifs_sb->local_nls,
604 cifs_sb->mnt_cifs_flags &
605 CIFS_MOUNT_MAP_SPECIAL_CHR);
607 CIFSSMBRenameOpenFile(xid, pTcon, netfid, NULL,
609 cifs_sb->mnt_cifs_flags &
610 CIFS_MOUNT_MAP_SPECIAL_CHR);
611 CIFSSMBClose(xid, pTcon, netfid);
612 if (direntry->d_inode)
613 direntry->d_inode->i_nlink--;
615 } else if (rc == -EACCES) {
616 /* try only if r/o attribute set in local lookup data? */
617 pinfo_buf = kzalloc(sizeof(FILE_BASIC_INFO), GFP_KERNEL);
619 /* ATTRS set to normal clears r/o bit */
620 pinfo_buf->Attributes = cpu_to_le32(ATTR_NORMAL);
621 if (!(pTcon->ses->flags & CIFS_SES_NT4))
622 rc = CIFSSMBSetTimes(xid, pTcon, full_path,
625 cifs_sb->mnt_cifs_flags &
626 CIFS_MOUNT_MAP_SPECIAL_CHR);
630 if (rc == -EOPNOTSUPP) {
633 /* rc = CIFSSMBSetAttrLegacy(xid, pTcon,
637 For some strange reason it seems that NT4 eats the
638 old setattr call without actually setting the
639 attributes so on to the third attempted workaround
642 /* BB could scan to see if we already have it open
643 and pass in pid of opener to function */
644 rc = CIFSSMBOpen(xid, pTcon, full_path,
645 FILE_OPEN, SYNCHRONIZE |
646 FILE_WRITE_ATTRIBUTES, 0,
647 &netfid, &oplock, NULL,
649 cifs_sb->mnt_cifs_flags &
650 CIFS_MOUNT_MAP_SPECIAL_CHR);
652 rc = CIFSSMBSetFileTimes(xid, pTcon,
655 CIFSSMBClose(xid, pTcon, netfid);
661 rc = CIFSSMBDelFile(xid, pTcon, full_path,
663 cifs_sb->mnt_cifs_flags &
664 CIFS_MOUNT_MAP_SPECIAL_CHR);
666 if (direntry->d_inode)
667 direntry->d_inode->i_nlink--;
668 } else if (rc == -ETXTBSY) {
672 rc = CIFSSMBOpen(xid, pTcon, full_path,
675 CREATE_DELETE_ON_CLOSE,
676 &netfid, &oplock, NULL,
678 cifs_sb->mnt_cifs_flags &
679 CIFS_MOUNT_MAP_SPECIAL_CHR);
681 CIFSSMBRenameOpenFile(xid, pTcon,
684 cifs_sb->mnt_cifs_flags &
685 CIFS_MOUNT_MAP_SPECIAL_CHR);
686 CIFSSMBClose(xid, pTcon, netfid);
687 if (direntry->d_inode)
688 direntry->d_inode->i_nlink--;
690 /* BB if rc = -ETXTBUSY goto the rename logic BB */
694 if (direntry->d_inode) {
695 cifsInode = CIFS_I(direntry->d_inode);
696 cifsInode->time = 0; /* will force revalidate to get info
698 direntry->d_inode->i_ctime = current_fs_time(inode->i_sb);
701 inode->i_ctime = inode->i_mtime = current_fs_time(inode->i_sb);
702 cifsInode = CIFS_I(inode);
703 cifsInode->time = 0; /* force revalidate of dir as well */
711 int cifs_mkdir(struct inode *inode, struct dentry *direntry, int mode)
715 struct cifs_sb_info *cifs_sb;
716 struct cifsTconInfo *pTcon;
717 char *full_path = NULL;
718 struct inode *newinode = NULL;
720 cFYI(1, ("In cifs_mkdir, mode = 0x%x inode = 0x%p", mode, inode));
724 cifs_sb = CIFS_SB(inode->i_sb);
725 pTcon = cifs_sb->tcon;
727 full_path = build_path_from_dentry(direntry);
728 if (full_path == NULL) {
732 /* BB add setting the equivalent of mode via CreateX w/ACLs */
733 rc = CIFSSMBMkDir(xid, pTcon, full_path, cifs_sb->local_nls,
734 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
736 cFYI(1, ("cifs_mkdir returned 0x%x", rc));
740 if (pTcon->ses->capabilities & CAP_UNIX)
741 rc = cifs_get_inode_info_unix(&newinode, full_path,
744 rc = cifs_get_inode_info(&newinode, full_path, NULL,
748 direntry->d_op = &cifs_ci_dentry_ops;
750 direntry->d_op = &cifs_dentry_ops;
751 d_instantiate(direntry, newinode);
752 if (direntry->d_inode)
753 direntry->d_inode->i_nlink = 2;
754 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX)
755 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
756 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
758 (__u64)current->fsuid,
759 (__u64)current->fsgid,
762 cifs_sb->mnt_cifs_flags &
763 CIFS_MOUNT_MAP_SPECIAL_CHR);
765 CIFSSMBUnixSetPerms(xid, pTcon, full_path,
767 (__u64)-1, 0 /* dev_t */,
769 cifs_sb->mnt_cifs_flags &
770 CIFS_MOUNT_MAP_SPECIAL_CHR);
773 /* BB to be implemented via Windows secrty descriptors
774 eg CIFSSMBWinSetPerms(xid, pTcon, full_path, mode,
775 -1, -1, local_nls); */
776 if(direntry->d_inode) {
777 direntry->d_inode->i_mode = mode;
778 direntry->d_inode->i_mode |= S_IFDIR;
779 if(cifs_sb->mnt_cifs_flags &
780 CIFS_MOUNT_SET_UID) {
781 direntry->d_inode->i_uid =
783 direntry->d_inode->i_gid =
794 int cifs_rmdir(struct inode *inode, struct dentry *direntry)
798 struct cifs_sb_info *cifs_sb;
799 struct cifsTconInfo *pTcon;
800 char *full_path = NULL;
801 struct cifsInodeInfo *cifsInode;
803 cFYI(1, ("cifs_rmdir, inode = 0x%p", inode));
807 cifs_sb = CIFS_SB(inode->i_sb);
808 pTcon = cifs_sb->tcon;
810 full_path = build_path_from_dentry(direntry);
811 if (full_path == NULL) {
816 rc = CIFSSMBRmDir(xid, pTcon, full_path, cifs_sb->local_nls,
817 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
821 i_size_write(direntry->d_inode,0);
822 direntry->d_inode->i_nlink = 0;
825 cifsInode = CIFS_I(direntry->d_inode);
826 cifsInode->time = 0; /* force revalidate to go get info when
828 direntry->d_inode->i_ctime = inode->i_ctime = inode->i_mtime =
829 current_fs_time(inode->i_sb);
836 int cifs_rename(struct inode *source_inode, struct dentry *source_direntry,
837 struct inode *target_inode, struct dentry *target_direntry)
841 struct cifs_sb_info *cifs_sb_source;
842 struct cifs_sb_info *cifs_sb_target;
843 struct cifsTconInfo *pTcon;
849 cifs_sb_target = CIFS_SB(target_inode->i_sb);
850 cifs_sb_source = CIFS_SB(source_inode->i_sb);
851 pTcon = cifs_sb_source->tcon;
853 if (pTcon != cifs_sb_target->tcon) {
855 return -EXDEV; /* BB actually could be allowed if same server,
857 Might eventually add support for this */
860 /* we already have the rename sem so we do not need to grab it again
861 here to protect the path integrity */
862 fromName = build_path_from_dentry(source_direntry);
863 toName = build_path_from_dentry(target_direntry);
864 if ((fromName == NULL) || (toName == NULL)) {
866 goto cifs_rename_exit;
869 rc = CIFSSMBRename(xid, pTcon, fromName, toName,
870 cifs_sb_source->local_nls,
871 cifs_sb_source->mnt_cifs_flags &
872 CIFS_MOUNT_MAP_SPECIAL_CHR);
874 /* check if they are the same file because rename of hardlinked
876 FILE_UNIX_BASIC_INFO *info_buf_source;
877 FILE_UNIX_BASIC_INFO *info_buf_target;
880 kmalloc(2 * sizeof(FILE_UNIX_BASIC_INFO), GFP_KERNEL);
881 if (info_buf_source != NULL) {
882 info_buf_target = info_buf_source + 1;
883 if (pTcon->ses->capabilities & CAP_UNIX)
884 rc = CIFSSMBUnixQPathInfo(xid, pTcon, fromName,
886 cifs_sb_source->local_nls,
887 cifs_sb_source->mnt_cifs_flags &
888 CIFS_MOUNT_MAP_SPECIAL_CHR);
889 /* else rc is still EEXIST so will fall through to
890 unlink the target and retry rename */
892 rc = CIFSSMBUnixQPathInfo(xid, pTcon, toName,
894 cifs_sb_target->local_nls,
895 /* remap based on source sb */
896 cifs_sb_source->mnt_cifs_flags &
897 CIFS_MOUNT_MAP_SPECIAL_CHR);
900 (info_buf_source->UniqueId ==
901 info_buf_target->UniqueId)) {
902 /* do not rename since the files are hardlinked which
905 /* we either can not tell the files are hardlinked
906 (as with Windows servers) or files are not
907 hardlinked so delete the target manually before
908 renaming to follow POSIX rather than Windows
910 cifs_unlink(target_inode, target_direntry);
911 rc = CIFSSMBRename(xid, pTcon, fromName,
913 cifs_sb_source->local_nls,
914 cifs_sb_source->mnt_cifs_flags
915 & CIFS_MOUNT_MAP_SPECIAL_CHR);
917 kfree(info_buf_source);
918 } /* if we can not get memory just leave rc as EEXIST */
922 cFYI(1, ("rename rc %d", rc));
925 if ((rc == -EIO) || (rc == -EEXIST)) {
929 /* BB FIXME Is Generic Read correct for rename? */
930 /* if renaming directory - we should not say CREATE_NOT_DIR,
931 need to test renaming open directory, also GENERIC_READ
932 might not right be right access to request */
933 rc = CIFSSMBOpen(xid, pTcon, fromName, FILE_OPEN, GENERIC_READ,
934 CREATE_NOT_DIR, &netfid, &oplock, NULL,
935 cifs_sb_source->local_nls,
936 cifs_sb_source->mnt_cifs_flags &
937 CIFS_MOUNT_MAP_SPECIAL_CHR);
939 rc = CIFSSMBRenameOpenFile(xid, pTcon, netfid, toName,
940 cifs_sb_source->local_nls,
941 cifs_sb_source->mnt_cifs_flags &
942 CIFS_MOUNT_MAP_SPECIAL_CHR);
943 CIFSSMBClose(xid, pTcon, netfid);
954 int cifs_revalidate(struct dentry *direntry)
959 struct cifs_sb_info *cifs_sb;
960 struct cifsInodeInfo *cifsInode;
962 struct timespec local_mtime;
963 int invalidate_inode = FALSE;
965 if (direntry->d_inode == NULL)
968 cifsInode = CIFS_I(direntry->d_inode);
970 if (cifsInode == NULL)
973 /* no sense revalidating inode info on file that no one can write */
974 if (CIFS_I(direntry->d_inode)->clientCanCacheRead)
979 cifs_sb = CIFS_SB(direntry->d_sb);
981 /* can not safely grab the rename sem here if rename calls revalidate
982 since that would deadlock */
983 full_path = build_path_from_dentry(direntry);
984 if (full_path == NULL) {
988 cFYI(1, ("Revalidate: %s inode 0x%p count %d dentry: 0x%p d_time %ld "
989 "jiffies %ld", full_path, direntry->d_inode,
990 direntry->d_inode->i_count.counter, direntry,
991 direntry->d_time, jiffies));
993 if (cifsInode->time == 0) {
994 /* was set to zero previously to force revalidate */
995 } else if (time_before(jiffies, cifsInode->time + HZ) &&
996 lookupCacheEnabled) {
997 if ((S_ISREG(direntry->d_inode->i_mode) == 0) ||
998 (direntry->d_inode->i_nlink == 1)) {
1003 cFYI(1, ("Have to revalidate file due to hardlinks"));
1007 /* save mtime and size */
1008 local_mtime = direntry->d_inode->i_mtime;
1009 local_size = direntry->d_inode->i_size;
1011 if (cifs_sb->tcon->ses->capabilities & CAP_UNIX) {
1012 rc = cifs_get_inode_info_unix(&direntry->d_inode, full_path,
1013 direntry->d_sb,xid);
1015 cFYI(1, ("error on getting revalidate info %d", rc));
1016 /* if (rc != -ENOENT)
1017 rc = 0; */ /* BB should we cache info on
1021 rc = cifs_get_inode_info(&direntry->d_inode, full_path, NULL,
1022 direntry->d_sb,xid);
1024 cFYI(1, ("error on getting revalidate info %d", rc));
1025 /* if (rc != -ENOENT)
1026 rc = 0; */ /* BB should we cache info on
1030 /* should we remap certain errors, access denied?, to zero */
1032 /* if not oplocked, we invalidate inode pages if mtime or file size
1033 had changed on server */
1035 if (timespec_equal(&local_mtime,&direntry->d_inode->i_mtime) &&
1036 (local_size == direntry->d_inode->i_size)) {
1037 cFYI(1, ("cifs_revalidate - inode unchanged"));
1039 /* file may have changed on server */
1040 if (cifsInode->clientCanCacheRead) {
1041 /* no need to invalidate inode pages since we were the
1042 only ones who could have modified the file and the
1043 server copy is staler than ours */
1045 invalidate_inode = TRUE;
1049 /* can not grab this sem since kernel filesys locking documentation
1050 indicates i_mutex may be taken by the kernel on lookup and rename
1051 which could deadlock if we grab the i_mutex here as well */
1052 /* mutex_lock(&direntry->d_inode->i_mutex);*/
1053 /* need to write out dirty pages here */
1054 if (direntry->d_inode->i_mapping) {
1055 /* do we need to lock inode until after invalidate completes
1057 filemap_fdatawrite(direntry->d_inode->i_mapping);
1059 if (invalidate_inode) {
1060 /* shrink_dcache not necessary now that cifs dentry ops
1061 are exported for negative dentries */
1062 /* if(S_ISDIR(direntry->d_inode->i_mode))
1063 shrink_dcache_parent(direntry); */
1064 if (S_ISREG(direntry->d_inode->i_mode)) {
1065 if (direntry->d_inode->i_mapping)
1066 filemap_fdatawait(direntry->d_inode->i_mapping);
1067 /* may eventually have to do this for open files too */
1068 if (list_empty(&(cifsInode->openFileList))) {
1069 /* changed on server - flush read ahead pages */
1070 cFYI(1, ("Invalidating read ahead data on "
1072 invalidate_remote_inode(direntry->d_inode);
1076 /* mutex_unlock(&direntry->d_inode->i_mutex); */
1083 int cifs_getattr(struct vfsmount *mnt, struct dentry *dentry,
1086 int err = cifs_revalidate(dentry);
1088 generic_fillattr(dentry->d_inode, stat);
1089 stat->blksize = CIFS_MAX_MSGSIZE;
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 */