4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2005
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/pagemap.h>
25 #include <linux/stat.h>
26 #include <linux/smp_lock.h>
29 #include "cifsproto.h"
30 #include "cifs_unicode.h"
31 #include "cifs_debug.h"
32 #include "cifs_fs_sb.h"
35 #ifdef CONFIG_CIFS_DEBUG2
36 static void dump_cifs_file_struct(struct file
*file
, char *label
)
38 struct cifsFileInfo
* cf
;
41 cf
= file
->private_data
;
43 cFYI(1,("empty cifs private file data"));
46 if(cf
->invalidHandle
) {
47 cFYI(1,("invalid handle"));
49 if(cf
->srch_inf
.endOfSearch
) {
50 cFYI(1,("end of search"));
52 if(cf
->srch_inf
.emptyDir
) {
53 cFYI(1,("empty dir"));
60 /* Returns one if new inode created (which therefore needs to be hashed) */
61 /* Might check in the future if inode number changed so we can rehash inode */
62 static int construct_dentry(struct qstr
*qstring
, struct file
*file
,
63 struct inode
**ptmp_inode
, struct dentry
**pnew_dentry
)
65 struct dentry
*tmp_dentry
;
66 struct cifs_sb_info
*cifs_sb
;
67 struct cifsTconInfo
*pTcon
;
70 cFYI(1, ("For %s", qstring
->name
));
71 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
72 pTcon
= cifs_sb
->tcon
;
74 qstring
->hash
= full_name_hash(qstring
->name
, qstring
->len
);
75 tmp_dentry
= d_lookup(file
->f_dentry
, qstring
);
77 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry
->d_inode
));
78 *ptmp_inode
= tmp_dentry
->d_inode
;
79 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
80 if(*ptmp_inode
== NULL
) {
81 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
82 if(*ptmp_inode
== NULL
)
85 d_instantiate(tmp_dentry
, *ptmp_inode
);
88 tmp_dentry
= d_alloc(file
->f_dentry
, qstring
);
89 if(tmp_dentry
== NULL
) {
90 cERROR(1,("Failed allocating dentry"));
95 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
97 tmp_dentry
->d_op
= &cifs_ci_dentry_ops
;
99 tmp_dentry
->d_op
= &cifs_dentry_ops
;
100 if(*ptmp_inode
== NULL
)
103 d_instantiate(tmp_dentry
, *ptmp_inode
);
104 d_rehash(tmp_dentry
);
107 tmp_dentry
->d_time
= jiffies
;
108 *pnew_dentry
= tmp_dentry
;
112 static void fill_in_inode(struct inode
*tmp_inode
, int new_buf_type
,
113 char * buf
, int *pobject_type
, int isNewInode
)
116 struct timespec local_mtime
;
118 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
119 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
121 __u64 allocation_size
;
124 /* save mtime and size */
125 local_mtime
= tmp_inode
->i_mtime
;
126 local_size
= tmp_inode
->i_size
;
129 FILE_DIRECTORY_INFO
*pfindData
= (FILE_DIRECTORY_INFO
*)buf
;
131 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
132 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
133 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
135 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
137 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
139 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
140 } else { /* legacy, OS2 and DOS style */
141 FIND_FILE_STANDARD_INFO
* pfindData
=
142 (FIND_FILE_STANDARD_INFO
*)buf
;
144 attr
= le16_to_cpu(pfindData
->Attributes
);
145 allocation_size
= le32_to_cpu(pfindData
->AllocationSize
);
146 end_of_file
= le32_to_cpu(pfindData
->DataSize
);
147 tmp_inode
->i_atime
= CURRENT_TIME
;
148 /* tmp_inode->i_mtime = BB FIXME - add dos time handling
149 tmp_inode->i_ctime = 0; BB FIXME */
153 /* Linux can not store file creation time unfortunately so ignore it */
155 cifsInfo
->cifsAttrs
= attr
;
156 cifsInfo
->time
= jiffies
;
158 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
159 /* 2767 perms - indicate mandatory locking */
160 /* BB fill in uid and gid here? with help from winbind?
161 or retrieve from NTFS stream extended attribute */
162 if (atomic_read(&cifsInfo
->inUse
) == 0) {
163 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
164 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
165 /* set default mode. will override for dirs below */
166 tmp_inode
->i_mode
= cifs_sb
->mnt_file_mode
;
168 /* mask off the type bits since it gets set
169 below and we do not want to get two type
171 tmp_inode
->i_mode
&= ~S_IFMT
;
174 if (attr
& ATTR_DIRECTORY
) {
175 *pobject_type
= DT_DIR
;
176 /* override default perms since we do not lock dirs */
177 if(atomic_read(&cifsInfo
->inUse
) == 0) {
178 tmp_inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
180 tmp_inode
->i_mode
|= S_IFDIR
;
181 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
182 (attr
& ATTR_SYSTEM
)) {
183 if (end_of_file
== 0) {
184 *pobject_type
= DT_FIFO
;
185 tmp_inode
->i_mode
|= S_IFIFO
;
187 /* rather than get the type here, we mark the
188 inode as needing revalidate and get the real type
189 (blk vs chr vs. symlink) later ie in lookup */
190 *pobject_type
= DT_REG
;
191 tmp_inode
->i_mode
|= S_IFREG
;
194 /* we no longer mark these because we could not follow them */
195 /* } else if (attr & ATTR_REPARSE) {
196 *pobject_type = DT_LNK;
197 tmp_inode->i_mode |= S_IFLNK; */
199 *pobject_type
= DT_REG
;
200 tmp_inode
->i_mode
|= S_IFREG
;
201 if (attr
& ATTR_READONLY
)
202 tmp_inode
->i_mode
&= ~(S_IWUGO
);
203 } /* could add code here - to validate if device or weird share type? */
205 /* can not fill in nlink here as in qpathinfo version and Unx search */
206 if (atomic_read(&cifsInfo
->inUse
) == 0) {
207 atomic_set(&cifsInfo
->inUse
, 1);
210 if (is_size_safe_to_change(cifsInfo
)) {
211 /* can not safely change the file size here if the
212 client is writing to it due to potential races */
213 i_size_write(tmp_inode
, end_of_file
);
215 /* 512 bytes (2**9) is the fake blocksize that must be used */
216 /* for this calculation, even though the reported blocksize is larger */
217 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
220 if (allocation_size
< end_of_file
)
221 cFYI(1, ("May be sparse file, allocation less than file size"));
222 cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld",
223 (unsigned long)tmp_inode
->i_size
,
224 (unsigned long long)tmp_inode
->i_blocks
,
225 tmp_inode
->i_blksize
));
226 if (S_ISREG(tmp_inode
->i_mode
)) {
227 cFYI(1, ("File inode"));
228 tmp_inode
->i_op
= &cifs_file_inode_ops
;
229 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
230 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
231 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
233 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
235 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
236 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
238 tmp_inode
->i_fop
= &cifs_file_ops
;
240 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
241 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
242 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
243 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
245 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
248 return; /* No sense invalidating pages for new inode
249 since have not started caching readahead file
252 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
253 (local_size
== tmp_inode
->i_size
)) {
254 cFYI(1, ("inode exists but unchanged"));
256 /* file may have changed on server */
257 cFYI(1, ("invalidate inode, readdir detected change"));
258 invalidate_remote_inode(tmp_inode
);
260 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
261 cFYI(1, ("Directory inode"));
262 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
263 tmp_inode
->i_fop
= &cifs_dir_ops
;
264 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
265 cFYI(1, ("Symbolic Link inode"));
266 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
268 cFYI(1, ("Init special inode"));
269 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
274 static void unix_fill_in_inode(struct inode
*tmp_inode
,
275 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
278 struct timespec local_mtime
;
280 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
281 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
283 __u32 type
= le32_to_cpu(pfindData
->Type
);
284 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
285 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
286 cifsInfo
->time
= jiffies
;
287 atomic_inc(&cifsInfo
->inUse
);
289 /* save mtime and size */
290 local_mtime
= tmp_inode
->i_mtime
;
291 local_size
= tmp_inode
->i_size
;
294 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
296 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
298 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
300 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
301 /* since we set the inode type below we need to mask off type
302 to avoid strange results if bits above were corrupt */
303 tmp_inode
->i_mode
&= ~S_IFMT
;
304 if (type
== UNIX_FILE
) {
305 *pobject_type
= DT_REG
;
306 tmp_inode
->i_mode
|= S_IFREG
;
307 } else if (type
== UNIX_SYMLINK
) {
308 *pobject_type
= DT_LNK
;
309 tmp_inode
->i_mode
|= S_IFLNK
;
310 } else if (type
== UNIX_DIR
) {
311 *pobject_type
= DT_DIR
;
312 tmp_inode
->i_mode
|= S_IFDIR
;
313 } else if (type
== UNIX_CHARDEV
) {
314 *pobject_type
= DT_CHR
;
315 tmp_inode
->i_mode
|= S_IFCHR
;
316 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
317 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
318 } else if (type
== UNIX_BLOCKDEV
) {
319 *pobject_type
= DT_BLK
;
320 tmp_inode
->i_mode
|= S_IFBLK
;
321 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
322 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
323 } else if (type
== UNIX_FIFO
) {
324 *pobject_type
= DT_FIFO
;
325 tmp_inode
->i_mode
|= S_IFIFO
;
326 } else if (type
== UNIX_SOCKET
) {
327 *pobject_type
= DT_SOCK
;
328 tmp_inode
->i_mode
|= S_IFSOCK
;
330 /* safest to just call it a file */
331 *pobject_type
= DT_REG
;
332 tmp_inode
->i_mode
|= S_IFREG
;
333 cFYI(1,("unknown inode type %d",type
));
336 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
337 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
338 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
340 if (is_size_safe_to_change(cifsInfo
)) {
341 /* can not safely change the file size here if the
342 client is writing to it due to potential races */
343 i_size_write(tmp_inode
,end_of_file
);
345 /* 512 bytes (2**9) is the fake blocksize that must be used */
346 /* for this calculation, not the real blocksize */
347 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
350 if (S_ISREG(tmp_inode
->i_mode
)) {
351 cFYI(1, ("File inode"));
352 tmp_inode
->i_op
= &cifs_file_inode_ops
;
354 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
355 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
356 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
358 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
360 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
361 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
363 tmp_inode
->i_fop
= &cifs_file_ops
;
365 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
366 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
367 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
368 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
370 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
373 return; /* No sense invalidating pages for new inode since we
374 have not started caching readahead file data yet */
376 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
377 (local_size
== tmp_inode
->i_size
)) {
378 cFYI(1, ("inode exists but unchanged"));
380 /* file may have changed on server */
381 cFYI(1, ("invalidate inode, readdir detected change"));
382 invalidate_remote_inode(tmp_inode
);
384 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
385 cFYI(1, ("Directory inode"));
386 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
387 tmp_inode
->i_fop
= &cifs_dir_ops
;
388 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
389 cFYI(1, ("Symbolic Link inode"));
390 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
391 /* tmp_inode->i_fop = *//* do not need to set to anything */
393 cFYI(1, ("Special inode"));
394 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
399 static int initiate_cifs_search(const int xid
, struct file
*file
)
403 struct cifsFileInfo
* cifsFile
;
404 struct cifs_sb_info
*cifs_sb
;
405 struct cifsTconInfo
*pTcon
;
407 if(file
->private_data
== NULL
) {
409 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
412 if(file
->private_data
== NULL
) {
415 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
417 cifsFile
= file
->private_data
;
418 cifsFile
->invalidHandle
= TRUE
;
419 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
421 if(file
->f_dentry
== NULL
)
424 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
428 pTcon
= cifs_sb
->tcon
;
432 full_path
= build_path_from_dentry(file
->f_dentry
);
434 if(full_path
== NULL
) {
438 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
441 /* test for Unix extensions */
442 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
443 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
444 } else if ((pTcon
->ses
->capabilities
&
445 (CAP_NT_SMBS
| CAP_NT_FIND
)) == 0) {
446 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
447 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
448 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
449 } else /* not srvinos - BB fixme add check for backlevel? */ {
450 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
453 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
454 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
455 cifs_sb
->mnt_cifs_flags
&
456 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
458 cifsFile
->invalidHandle
= FALSE
;
459 if((rc
== -EOPNOTSUPP
) &&
460 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
461 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
468 /* return length of unicode string in bytes */
469 static int cifs_unicode_bytelen(char *str
)
472 __le16
* ustr
= (__le16
*)str
;
474 for(len
=0;len
<= PATH_MAX
;len
++) {
478 cFYI(1,("Unicode string longer than PATH_MAX found"));
482 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
485 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
487 if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
488 FIND_FILE_STANDARD_INFO
* pfData
;
489 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
491 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
492 pfData
->FileNameLength
;
494 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
495 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
496 /* validate that new_entry is not past end of SMB */
497 if(new_entry
>= end_of_smb
) {
499 ("search entry %p began after end of SMB %p old entry %p",
500 new_entry
, end_of_smb
, old_entry
));
502 } else if(((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
503 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
)) ||
504 ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
505 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
506 cERROR(1,("search entry %p extends after end of SMB %p",
507 new_entry
, end_of_smb
));
514 #define UNICODE_DOT cpu_to_le16(0x2e)
516 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
517 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
520 char * filename
= NULL
;
523 if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
524 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
525 filename
= &pFindData
->FileName
[0];
526 if(cfile
->srch_inf
.unicode
) {
527 len
= cifs_unicode_bytelen(filename
);
529 /* BB should we make this strnlen of PATH_MAX? */
530 len
= strnlen(filename
, 5);
532 } else if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
533 FILE_DIRECTORY_INFO
* pFindData
=
534 (FILE_DIRECTORY_INFO
*)current_entry
;
535 filename
= &pFindData
->FileName
[0];
536 len
= le32_to_cpu(pFindData
->FileNameLength
);
537 } else if(cfile
->srch_inf
.info_level
==
538 SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
539 FILE_FULL_DIRECTORY_INFO
* pFindData
=
540 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
541 filename
= &pFindData
->FileName
[0];
542 len
= le32_to_cpu(pFindData
->FileNameLength
);
543 } else if(cfile
->srch_inf
.info_level
==
544 SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
545 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
546 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
547 filename
= &pFindData
->FileName
[0];
548 len
= le32_to_cpu(pFindData
->FileNameLength
);
549 } else if(cfile
->srch_inf
.info_level
==
550 SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
551 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
552 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
553 filename
= &pFindData
->FileName
[0];
554 len
= le32_to_cpu(pFindData
->FileNameLength
);
555 } else if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
) {
556 FIND_FILE_STANDARD_INFO
* pFindData
=
557 (FIND_FILE_STANDARD_INFO
*)current_entry
;
558 filename
= &pFindData
->FileName
[0];
559 len
= le32_to_cpu(pFindData
->FileNameLength
);
561 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
565 if(cfile
->srch_inf
.unicode
) {
566 __le16
*ufilename
= (__le16
*)filename
;
569 if(ufilename
[0] == UNICODE_DOT
)
571 } else if(len
== 4) {
573 if((ufilename
[0] == UNICODE_DOT
)
574 &&(ufilename
[1] == UNICODE_DOT
))
579 if(filename
[0] == '.')
581 } else if(len
== 2) {
582 if((filename
[0] == '.') && (filename
[1] == '.'))
591 /* Check if directory that we are searching has changed so we can decide
592 whether we can use the cached search results from the previous search */
593 static int is_dir_changed(struct file
* file
)
595 struct inode
* inode
;
596 struct cifsInodeInfo
*cifsInfo
;
598 if(file
->f_dentry
== NULL
)
601 inode
= file
->f_dentry
->d_inode
;
606 cifsInfo
= CIFS_I(inode
);
608 if(cifsInfo
->time
== 0)
609 return 1; /* directory was changed, perhaps due to unlink */
615 /* find the corresponding entry in the search */
616 /* Note that the SMB server returns search entries for . and .. which
617 complicates logic here if we choose to parse for them and we do not
618 assume that they are located in the findfirst return buffer.*/
619 /* We start counting in the buffer with entry 2 and increment for every
620 entry (do not increment for . or .. entry) */
621 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
622 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
626 loff_t first_entry_in_buffer
;
627 loff_t index_to_find
= file
->f_pos
;
628 struct cifsFileInfo
* cifsFile
= file
->private_data
;
629 /* check if index in the buffer */
631 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
632 (num_to_ret
== NULL
))
635 *ppCurrentEntry
= NULL
;
636 first_entry_in_buffer
=
637 cifsFile
->srch_inf
.index_of_last_entry
-
638 cifsFile
->srch_inf
.entries_in_buffer
;
640 /* if first entry in buf is zero then is first buffer
641 in search response data which means it is likely . and ..
642 will be in this buffer, although some servers do not return
643 . and .. for the root of a drive and for those we need
644 to start two entries earlier */
646 #ifdef CONFIG_CIFS_DEBUG2
647 dump_cifs_file_struct(file
, "In fce ");
649 if(((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
650 is_dir_changed(file
)) ||
651 (index_to_find
< first_entry_in_buffer
)) {
652 /* close and restart search */
653 cFYI(1,("search backing up - close and restart search"));
654 cifsFile
->invalidHandle
= TRUE
;
655 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
656 kfree(cifsFile
->search_resume_name
);
657 cifsFile
->search_resume_name
= NULL
;
658 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
659 cFYI(1,("freeing SMB ff cache buf on search rewind"));
660 if(cifsFile
->srch_inf
.smallBuf
)
661 cifs_small_buf_release(cifsFile
->srch_inf
.
664 cifs_buf_release(cifsFile
->srch_inf
.
667 rc
= initiate_cifs_search(xid
,file
);
669 cFYI(1,("error %d reinitiating a search on rewind",rc
));
674 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
675 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
676 cFYI(1,("calling findnext2"));
677 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
678 &cifsFile
->srch_inf
);
682 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
683 /* we found the buffer that contains the entry */
684 /* scan and find it */
686 char * current_entry
;
687 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
688 smbCalcSize((struct smb_hdr
*)
689 cifsFile
->srch_inf
.ntwrk_buf_start
);
691 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
692 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
693 - cifsFile
->srch_inf
.entries_in_buffer
;
694 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
695 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
697 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
698 /* go entry by entry figuring out which is first */
699 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
,
700 cifsFile
->srch_inf
.info_level
);
702 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
703 /* BB fixme - check if we should flag this error */
704 cERROR(1,("reached end of buf searching for pos in buf"
705 " %d index to find %lld rc %d",
706 pos_in_buf
,index_to_find
,rc
));
709 *ppCurrentEntry
= current_entry
;
711 cFYI(1,("index not in buffer - could not findnext into it"));
715 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
716 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
719 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
724 /* inode num, inode type and filename returned */
725 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
726 char *current_entry
, __u16 level
, unsigned int unicode
,
727 struct cifs_sb_info
* cifs_sb
, int max_len
, ino_t
*pinum
)
730 unsigned int len
= 0;
732 struct nls_table
* nlt
= cifs_sb
->local_nls
;
736 if(level
== SMB_FIND_FILE_UNIX
) {
737 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
739 filename
= &pFindData
->FileName
[0];
741 len
= cifs_unicode_bytelen(filename
);
743 /* BB should we make this strnlen of PATH_MAX? */
744 len
= strnlen(filename
, PATH_MAX
);
747 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
748 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
749 *pinum
= pFindData
->UniqueId
;
750 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
751 FILE_DIRECTORY_INFO
* pFindData
=
752 (FILE_DIRECTORY_INFO
*)current_entry
;
753 filename
= &pFindData
->FileName
[0];
754 len
= le32_to_cpu(pFindData
->FileNameLength
);
755 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
756 FILE_FULL_DIRECTORY_INFO
* pFindData
=
757 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
758 filename
= &pFindData
->FileName
[0];
759 len
= le32_to_cpu(pFindData
->FileNameLength
);
760 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
761 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
762 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
763 filename
= &pFindData
->FileName
[0];
764 len
= le32_to_cpu(pFindData
->FileNameLength
);
765 *pinum
= pFindData
->UniqueId
;
766 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
767 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
768 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
769 filename
= &pFindData
->FileName
[0];
770 len
= le32_to_cpu(pFindData
->FileNameLength
);
771 } else if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
772 FIND_FILE_STANDARD_INFO
* pFindData
=
773 (FIND_FILE_STANDARD_INFO
*)current_entry
;
774 filename
= &pFindData
->FileName
[0];
775 /* one byte length, no name conversion */
776 len
= (unsigned int)pFindData
->FileNameLength
;
778 cFYI(1,("Unknown findfirst level %d",level
));
783 cERROR(1,("bad search response length %d past smb end", len
));
788 /* BB fixme - test with long names */
789 /* Note converted filename can be longer than in unicode */
790 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
791 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
792 (__le16
*)filename
, len
/2, nlt
);
794 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
795 (__le16
*)filename
,len
/2,nlt
);
797 pqst
->name
= filename
;
800 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
801 /* cFYI(1,("filldir on %s",pqst->name)); */
805 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
806 filldir_t filldir
, void *direntry
, char *scratch_buf
, int max_len
)
810 struct cifsFileInfo
* pCifsF
;
813 struct cifs_sb_info
* cifs_sb
;
814 struct inode
*tmp_inode
;
815 struct dentry
*tmp_dentry
;
817 /* get filename and len into qstring */
819 /* decide whether to create and populate ionde */
820 if((direntry
== NULL
) || (file
== NULL
))
823 pCifsF
= file
->private_data
;
825 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
828 if(file
->f_dentry
== NULL
)
831 rc
= cifs_entry_is_dot(pfindEntry
,pCifsF
);
832 /* skip . and .. since we added them first */
836 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
838 qstring
.name
= scratch_buf
;
839 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
840 pCifsF
->srch_inf
.info_level
,
841 pCifsF
->srch_inf
.unicode
,cifs_sb
,
843 &inum
/* returned */);
848 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
849 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
853 /* inode created, we need to hash it with right inode number */
855 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
856 tmp_inode
->i_ino
= inum
;
858 insert_inode_hash(tmp_inode
);
861 /* we pass in rc below, indicating whether it is a new inode,
862 so we can figure out whether to invalidate the inode cached
863 data if the file has changed */
864 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
)
865 unix_fill_in_inode(tmp_inode
,
866 (FILE_UNIX_INFO
*)pfindEntry
,
868 else if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
)
869 fill_in_inode(tmp_inode
, 0 /* old level 1 buffer type */,
870 pfindEntry
, &obj_type
, rc
);
872 fill_in_inode(tmp_inode
, 1 /* NT */, pfindEntry
, &obj_type
, rc
);
875 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
876 tmp_inode
->i_ino
,obj_type
);
878 cFYI(1,("filldir rc = %d",rc
));
885 static int cifs_save_resume_key(const char *current_entry
,
886 struct cifsFileInfo
*cifsFile
)
889 unsigned int len
= 0;
893 if((cifsFile
== NULL
) || (current_entry
== NULL
))
896 level
= cifsFile
->srch_inf
.info_level
;
898 if(level
== SMB_FIND_FILE_UNIX
) {
899 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
901 filename
= &pFindData
->FileName
[0];
902 if(cifsFile
->srch_inf
.unicode
) {
903 len
= cifs_unicode_bytelen(filename
);
905 /* BB should we make this strnlen of PATH_MAX? */
906 len
= strnlen(filename
, PATH_MAX
);
908 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
909 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
910 FILE_DIRECTORY_INFO
* pFindData
=
911 (FILE_DIRECTORY_INFO
*)current_entry
;
912 filename
= &pFindData
->FileName
[0];
913 len
= le32_to_cpu(pFindData
->FileNameLength
);
914 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
915 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
916 FILE_FULL_DIRECTORY_INFO
* pFindData
=
917 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
918 filename
= &pFindData
->FileName
[0];
919 len
= le32_to_cpu(pFindData
->FileNameLength
);
920 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
921 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
922 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
923 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
924 filename
= &pFindData
->FileName
[0];
925 len
= le32_to_cpu(pFindData
->FileNameLength
);
926 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
927 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
928 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
929 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
930 filename
= &pFindData
->FileName
[0];
931 len
= le32_to_cpu(pFindData
->FileNameLength
);
932 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
933 } else if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
934 FIND_FILE_STANDARD_INFO
* pFindData
=
935 (FIND_FILE_STANDARD_INFO
*)current_entry
;
936 filename
= &pFindData
->FileName
[0];
937 /* one byte length, no name conversion */
938 len
= (unsigned int)pFindData
->FileNameLength
;
940 cFYI(1,("Unknown findfirst level %d",level
));
943 cifsFile
->srch_inf
.resume_name_len
= len
;
944 cifsFile
->srch_inf
.presume_name
= filename
;
948 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
952 struct cifs_sb_info
*cifs_sb
;
953 struct cifsTconInfo
*pTcon
;
954 struct cifsFileInfo
*cifsFile
= NULL
;
955 char * current_entry
;
957 char * tmp_buf
= NULL
;
963 if(file
->f_dentry
== NULL
) {
968 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
969 pTcon
= cifs_sb
->tcon
;
973 switch ((int) file
->f_pos
) {
975 if (filldir(direntry
, ".", 1, file
->f_pos
,
976 file
->f_dentry
->d_inode
->i_ino
, DT_DIR
) < 0) {
977 cERROR(1, ("Filldir for current dir failed"));
983 if (filldir(direntry
, "..", 2, file
->f_pos
,
984 file
->f_dentry
->d_parent
->d_inode
->i_ino
, DT_DIR
) < 0) {
985 cERROR(1, ("Filldir for parent dir failed"));
991 /* 1) If search is active,
992 is in current search buffer?
993 if it before then restart search
994 if after then keep searching till find it */
996 if(file
->private_data
== NULL
) {
997 rc
= initiate_cifs_search(xid
,file
);
998 cFYI(1,("initiate cifs search rc %d",rc
));
1004 if(file
->private_data
== NULL
) {
1009 cifsFile
= file
->private_data
;
1010 if (cifsFile
->srch_inf
.endOfSearch
) {
1011 if(cifsFile
->srch_inf
.emptyDir
) {
1012 cFYI(1, ("End of search, empty dir"));
1017 cifsFile->invalidHandle = TRUE;
1018 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1020 kfree(cifsFile->search_resume_name);
1021 cifsFile->search_resume_name = NULL; */
1023 rc
= find_cifs_entry(xid
,pTcon
, file
,
1024 ¤t_entry
,&num_to_fill
);
1026 cFYI(1,("fce error %d",rc
));
1028 } else if (current_entry
!= NULL
) {
1029 cFYI(1,("entry %lld found",file
->f_pos
));
1031 cFYI(1,("could not find entry"));
1034 cFYI(1,("loop through %d times filling dir for net buf %p",
1035 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
1036 max_len
= smbCalcSize((struct smb_hdr
*)
1037 cifsFile
->srch_inf
.ntwrk_buf_start
);
1038 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
1040 /* To be safe - for UCS to UTF-8 with strings loaded
1041 with the rare long characters alloc more to account for
1042 such multibyte target UTF-8 characters. cifs_unicode.c,
1043 which actually does the conversion, has the same limit */
1044 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
1045 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
1046 if(current_entry
== NULL
) {
1047 /* evaluate whether this case is an error */
1048 cERROR(1,("past end of SMB num to fill %d i %d",
1052 /* if buggy server returns . and .. late do
1053 we want to check for that here? */
1054 rc
= cifs_filldir(current_entry
, file
,
1055 filldir
, direntry
, tmp_buf
, max_len
);
1058 cifsFile
->srch_inf
.index_of_last_entry
) {
1059 cFYI(1,("last entry in buf at pos %lld %s",
1060 file
->f_pos
,tmp_buf
));
1061 cifs_save_resume_key(current_entry
,cifsFile
);
1065 nxt_dir_entry(current_entry
, end_of_smb
,
1066 cifsFile
->srch_inf
.info_level
);