4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2008
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>
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
34 #ifdef CONFIG_CIFS_DEBUG2
35 static void dump_cifs_file_struct(struct file
*file
, char *label
)
37 struct cifsFileInfo
*cf
;
40 cf
= file
->private_data
;
42 cFYI(1, ("empty cifs private file data"));
45 if (cf
->invalidHandle
)
46 cFYI(1, ("invalid handle"));
47 if (cf
->srch_inf
.endOfSearch
)
48 cFYI(1, ("end of search"));
49 if (cf
->srch_inf
.emptyDir
)
50 cFYI(1, ("empty dir"));
54 static inline void dump_cifs_file_struct(struct file
*file
, char *label
)
59 /* Returns 1 if new inode created, 2 if both dentry and inode were */
60 /* Might check in the future if inode number changed so we can rehash inode */
62 construct_dentry(struct qstr
*qstring
, struct file
*file
,
63 struct inode
**ptmp_inode
, struct dentry
**pnew_dentry
,
66 struct dentry
*tmp_dentry
= NULL
;
67 struct super_block
*sb
= file
->f_path
.dentry
->d_sb
;
70 cFYI(1, ("For %s", qstring
->name
));
72 qstring
->hash
= full_name_hash(qstring
->name
, qstring
->len
);
73 tmp_dentry
= d_lookup(file
->f_path
.dentry
, qstring
);
75 /* BB: overwrite old name? i.e. tmp_dentry->d_name and
76 * tmp_dentry->d_name.len??
78 cFYI(0, ("existing dentry with inode 0x%p",
79 tmp_dentry
->d_inode
));
80 *ptmp_inode
= tmp_dentry
->d_inode
;
81 if (*ptmp_inode
== NULL
) {
82 *ptmp_inode
= cifs_new_inode(sb
, inum
);
83 if (*ptmp_inode
== NULL
)
88 tmp_dentry
= d_alloc(file
->f_path
.dentry
, qstring
);
89 if (tmp_dentry
== NULL
) {
90 cERROR(1, ("Failed allocating dentry"));
95 if (CIFS_SB(sb
)->tcon
->nocase
)
96 tmp_dentry
->d_op
= &cifs_ci_dentry_ops
;
98 tmp_dentry
->d_op
= &cifs_dentry_ops
;
100 *ptmp_inode
= cifs_new_inode(sb
, inum
);
101 if (*ptmp_inode
== NULL
)
106 tmp_dentry
->d_time
= jiffies
;
107 *pnew_dentry
= tmp_dentry
;
111 static void AdjustForTZ(struct cifsTconInfo
*tcon
, struct inode
*inode
)
113 if ((tcon
) && (tcon
->ses
) && (tcon
->ses
->server
)) {
114 inode
->i_ctime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
115 inode
->i_mtime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
116 inode
->i_atime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
122 static void fill_in_inode(struct inode
*tmp_inode
, int new_buf_type
,
123 char *buf
, unsigned int *pobject_type
, int isNewInode
)
126 struct timespec local_mtime
;
128 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
129 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
131 __u64 allocation_size
;
133 umode_t default_mode
;
135 /* save mtime and size */
136 local_mtime
= tmp_inode
->i_mtime
;
137 local_size
= tmp_inode
->i_size
;
140 FILE_DIRECTORY_INFO
*pfindData
= (FILE_DIRECTORY_INFO
*)buf
;
142 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
143 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
144 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
146 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
148 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
150 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
151 } else { /* legacy, OS2 and DOS style */
152 /* struct timespec ts;*/
153 FIND_FILE_STANDARD_INFO
*pfindData
=
154 (FIND_FILE_STANDARD_INFO
*)buf
;
156 tmp_inode
->i_mtime
= cnvrtDosUnixTm(
157 le16_to_cpu(pfindData
->LastWriteDate
),
158 le16_to_cpu(pfindData
->LastWriteTime
));
159 tmp_inode
->i_atime
= cnvrtDosUnixTm(
160 le16_to_cpu(pfindData
->LastAccessDate
),
161 le16_to_cpu(pfindData
->LastAccessTime
));
162 tmp_inode
->i_ctime
= cnvrtDosUnixTm(
163 le16_to_cpu(pfindData
->LastWriteDate
),
164 le16_to_cpu(pfindData
->LastWriteTime
));
165 AdjustForTZ(cifs_sb
->tcon
, tmp_inode
);
166 attr
= le16_to_cpu(pfindData
->Attributes
);
167 allocation_size
= le32_to_cpu(pfindData
->AllocationSize
);
168 end_of_file
= le32_to_cpu(pfindData
->DataSize
);
171 /* Linux can not store file creation time unfortunately so ignore it */
173 cifsInfo
->cifsAttrs
= attr
;
174 #ifdef CONFIG_CIFS_EXPERIMENTAL
175 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_CIFS_ACL
) {
176 /* get more accurate mode via ACL - so force inode refresh */
179 #endif /* CONFIG_CIFS_EXPERIMENTAL */
180 cifsInfo
->time
= jiffies
;
182 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
183 /* 2767 perms - indicate mandatory locking */
184 /* BB fill in uid and gid here? with help from winbind?
185 or retrieve from NTFS stream extended attribute */
186 if (atomic_read(&cifsInfo
->inUse
) == 0) {
187 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
188 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
191 if (attr
& ATTR_DIRECTORY
)
192 default_mode
= cifs_sb
->mnt_dir_mode
;
194 default_mode
= cifs_sb
->mnt_file_mode
;
196 /* set initial permissions */
197 if ((atomic_read(&cifsInfo
->inUse
) == 0) ||
198 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DYNPERM
) == 0)
199 tmp_inode
->i_mode
= default_mode
;
201 /* just reenable write bits if !ATTR_READONLY */
202 if ((tmp_inode
->i_mode
& S_IWUGO
) == 0 &&
203 (attr
& ATTR_READONLY
) == 0)
204 tmp_inode
->i_mode
|= (S_IWUGO
& default_mode
);
206 tmp_inode
->i_mode
&= ~S_IFMT
;
209 /* clear write bits if ATTR_READONLY is set */
210 if (attr
& ATTR_READONLY
)
211 tmp_inode
->i_mode
&= ~S_IWUGO
;
214 if ((attr
& ATTR_SYSTEM
) &&
215 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
)) {
216 if (end_of_file
== 0) {
217 tmp_inode
->i_mode
|= S_IFIFO
;
218 *pobject_type
= DT_FIFO
;
221 * trying to get the type can be slow, so just call
222 * this a regular file for now, and mark for reval
224 tmp_inode
->i_mode
|= S_IFREG
;
225 *pobject_type
= DT_REG
;
229 if (attr
& ATTR_DIRECTORY
) {
230 tmp_inode
->i_mode
|= S_IFDIR
;
231 *pobject_type
= DT_DIR
;
233 tmp_inode
->i_mode
|= S_IFREG
;
234 *pobject_type
= DT_REG
;
238 /* can not fill in nlink here as in qpathinfo version and Unx search */
239 if (atomic_read(&cifsInfo
->inUse
) == 0)
240 atomic_set(&cifsInfo
->inUse
, 1);
242 cifsInfo
->server_eof
= end_of_file
;
243 spin_lock(&tmp_inode
->i_lock
);
244 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
245 /* can not safely change the file size here if the
246 client is writing to it due to potential races */
247 i_size_write(tmp_inode
, end_of_file
);
249 /* 512 bytes (2**9) is the fake blocksize that must be used */
250 /* for this calculation, even though the reported blocksize is larger */
251 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
253 spin_unlock(&tmp_inode
->i_lock
);
255 if (allocation_size
< end_of_file
)
256 cFYI(1, ("May be sparse file, allocation less than file size"));
257 cFYI(1, ("File Size %ld and blocks %llu",
258 (unsigned long)tmp_inode
->i_size
,
259 (unsigned long long)tmp_inode
->i_blocks
));
260 if (S_ISREG(tmp_inode
->i_mode
)) {
261 cFYI(1, ("File inode"));
262 tmp_inode
->i_op
= &cifs_file_inode_ops
;
263 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
264 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
265 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
267 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
268 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
269 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
271 tmp_inode
->i_fop
= &cifs_file_ops
;
273 if ((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
274 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
275 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
276 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
278 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
281 return; /* No sense invalidating pages for new inode
282 since have not started caching readahead file
285 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
286 (local_size
== tmp_inode
->i_size
)) {
287 cFYI(1, ("inode exists but unchanged"));
289 /* file may have changed on server */
290 cFYI(1, ("invalidate inode, readdir detected change"));
291 invalidate_remote_inode(tmp_inode
);
293 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
294 cFYI(1, ("Directory inode"));
295 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
296 tmp_inode
->i_fop
= &cifs_dir_ops
;
297 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
298 cFYI(1, ("Symbolic Link inode"));
299 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
301 cFYI(1, ("Init special inode"));
302 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
307 static void unix_fill_in_inode(struct inode
*tmp_inode
,
308 FILE_UNIX_INFO
*pfindData
, unsigned int *pobject_type
, int isNewInode
)
311 struct timespec local_mtime
;
313 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
314 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
316 __u32 type
= le32_to_cpu(pfindData
->Type
);
317 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
318 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
319 cifsInfo
->time
= jiffies
;
320 atomic_inc(&cifsInfo
->inUse
);
322 /* save mtime and size */
323 local_mtime
= tmp_inode
->i_mtime
;
324 local_size
= tmp_inode
->i_size
;
327 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
329 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
331 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
333 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
334 /* since we set the inode type below we need to mask off type
335 to avoid strange results if bits above were corrupt */
336 tmp_inode
->i_mode
&= ~S_IFMT
;
337 if (type
== UNIX_FILE
) {
338 *pobject_type
= DT_REG
;
339 tmp_inode
->i_mode
|= S_IFREG
;
340 } else if (type
== UNIX_SYMLINK
) {
341 *pobject_type
= DT_LNK
;
342 tmp_inode
->i_mode
|= S_IFLNK
;
343 } else if (type
== UNIX_DIR
) {
344 *pobject_type
= DT_DIR
;
345 tmp_inode
->i_mode
|= S_IFDIR
;
346 } else if (type
== UNIX_CHARDEV
) {
347 *pobject_type
= DT_CHR
;
348 tmp_inode
->i_mode
|= S_IFCHR
;
349 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
350 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
351 } else if (type
== UNIX_BLOCKDEV
) {
352 *pobject_type
= DT_BLK
;
353 tmp_inode
->i_mode
|= S_IFBLK
;
354 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
355 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
356 } else if (type
== UNIX_FIFO
) {
357 *pobject_type
= DT_FIFO
;
358 tmp_inode
->i_mode
|= S_IFIFO
;
359 } else if (type
== UNIX_SOCKET
) {
360 *pobject_type
= DT_SOCK
;
361 tmp_inode
->i_mode
|= S_IFSOCK
;
363 /* safest to just call it a file */
364 *pobject_type
= DT_REG
;
365 tmp_inode
->i_mode
|= S_IFREG
;
366 cFYI(1, ("unknown inode type %d", type
));
369 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
370 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
372 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
373 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
374 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
376 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
377 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
379 cifsInfo
->server_eof
= end_of_file
;
380 spin_lock(&tmp_inode
->i_lock
);
381 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
382 /* can not safely change the file size here if the
383 client is writing to it due to potential races */
384 i_size_write(tmp_inode
, end_of_file
);
386 /* 512 bytes (2**9) is the fake blocksize that must be used */
387 /* for this calculation, not the real blocksize */
388 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
390 spin_unlock(&tmp_inode
->i_lock
);
392 if (S_ISREG(tmp_inode
->i_mode
)) {
393 cFYI(1, ("File inode"));
394 tmp_inode
->i_op
= &cifs_file_inode_ops
;
396 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
397 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
398 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
400 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
401 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
402 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
404 tmp_inode
->i_fop
= &cifs_file_ops
;
406 if ((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
407 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
408 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
409 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
411 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
414 return; /* No sense invalidating pages for new inode
415 since we have not started caching readahead
416 file data for it yet */
418 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
419 (local_size
== tmp_inode
->i_size
)) {
420 cFYI(1, ("inode exists but unchanged"));
422 /* file may have changed on server */
423 cFYI(1, ("invalidate inode, readdir detected change"));
424 invalidate_remote_inode(tmp_inode
);
426 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
427 cFYI(1, ("Directory inode"));
428 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
429 tmp_inode
->i_fop
= &cifs_dir_ops
;
430 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
431 cFYI(1, ("Symbolic Link inode"));
432 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
433 /* tmp_inode->i_fop = *//* do not need to set to anything */
435 cFYI(1, ("Special inode"));
436 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
441 static int initiate_cifs_search(const int xid
, struct file
*file
)
445 struct cifsFileInfo
*cifsFile
;
446 struct cifs_sb_info
*cifs_sb
;
447 struct cifsTconInfo
*pTcon
;
449 if (file
->private_data
== NULL
) {
451 kzalloc(sizeof(struct cifsFileInfo
), GFP_KERNEL
);
454 if (file
->private_data
== NULL
)
456 cifsFile
= file
->private_data
;
457 cifsFile
->invalidHandle
= true;
458 cifsFile
->srch_inf
.endOfSearch
= false;
460 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
464 pTcon
= cifs_sb
->tcon
;
468 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
470 if (full_path
== NULL
)
473 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
476 /* test for Unix extensions */
477 /* but now check for them on the share/mount not on the SMB session */
478 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
480 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
481 else if ((pTcon
->ses
->capabilities
&
482 (CAP_NT_SMBS
| CAP_NT_FIND
)) == 0) {
483 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
484 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
485 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
486 } else /* not srvinos - BB fixme add check for backlevel? */ {
487 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
490 rc
= CIFSFindFirst(xid
, pTcon
, full_path
, cifs_sb
->local_nls
,
491 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
492 cifs_sb
->mnt_cifs_flags
&
493 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
495 cifsFile
->invalidHandle
= false;
496 if ((rc
== -EOPNOTSUPP
) &&
497 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
498 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
505 /* return length of unicode string in bytes */
506 static int cifs_unicode_bytelen(char *str
)
509 __le16
*ustr
= (__le16
*)str
;
511 for (len
= 0; len
<= PATH_MAX
; len
++) {
515 cFYI(1, ("Unicode string longer than PATH_MAX found"));
519 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
522 FILE_DIRECTORY_INFO
*pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
524 if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
525 FIND_FILE_STANDARD_INFO
*pfData
;
526 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
528 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
529 pfData
->FileNameLength
;
531 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
532 cFYI(1, ("new entry %p old entry %p", new_entry
, old_entry
));
533 /* validate that new_entry is not past end of SMB */
534 if (new_entry
>= end_of_smb
) {
536 ("search entry %p began after end of SMB %p old entry %p",
537 new_entry
, end_of_smb
, old_entry
));
539 } else if (((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
540 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
))
541 || ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
542 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
543 cERROR(1, ("search entry %p extends after end of SMB %p",
544 new_entry
, end_of_smb
));
551 #define UNICODE_DOT cpu_to_le16(0x2e)
553 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
554 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
557 char *filename
= NULL
;
560 if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
561 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
562 filename
= &pFindData
->FileName
[0];
563 if (cfile
->srch_inf
.unicode
) {
564 len
= cifs_unicode_bytelen(filename
);
566 /* BB should we make this strnlen of PATH_MAX? */
567 len
= strnlen(filename
, 5);
569 } else if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
570 FILE_DIRECTORY_INFO
*pFindData
=
571 (FILE_DIRECTORY_INFO
*)current_entry
;
572 filename
= &pFindData
->FileName
[0];
573 len
= le32_to_cpu(pFindData
->FileNameLength
);
574 } else if (cfile
->srch_inf
.info_level
==
575 SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
576 FILE_FULL_DIRECTORY_INFO
*pFindData
=
577 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
578 filename
= &pFindData
->FileName
[0];
579 len
= le32_to_cpu(pFindData
->FileNameLength
);
580 } else if (cfile
->srch_inf
.info_level
==
581 SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
582 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
583 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
584 filename
= &pFindData
->FileName
[0];
585 len
= le32_to_cpu(pFindData
->FileNameLength
);
586 } else if (cfile
->srch_inf
.info_level
==
587 SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
588 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
589 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
590 filename
= &pFindData
->FileName
[0];
591 len
= le32_to_cpu(pFindData
->FileNameLength
);
592 } else if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
) {
593 FIND_FILE_STANDARD_INFO
*pFindData
=
594 (FIND_FILE_STANDARD_INFO
*)current_entry
;
595 filename
= &pFindData
->FileName
[0];
596 len
= pFindData
->FileNameLength
;
598 cFYI(1, ("Unknown findfirst level %d",
599 cfile
->srch_inf
.info_level
));
603 if (cfile
->srch_inf
.unicode
) {
604 __le16
*ufilename
= (__le16
*)filename
;
607 if (ufilename
[0] == UNICODE_DOT
)
609 } else if (len
== 4) {
611 if ((ufilename
[0] == UNICODE_DOT
)
612 && (ufilename
[1] == UNICODE_DOT
))
617 if (filename
[0] == '.')
619 } else if (len
== 2) {
620 if ((filename
[0] == '.') && (filename
[1] == '.'))
629 /* Check if directory that we are searching has changed so we can decide
630 whether we can use the cached search results from the previous search */
631 static int is_dir_changed(struct file
*file
)
633 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
634 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
636 if (cifsInfo
->time
== 0)
637 return 1; /* directory was changed, perhaps due to unlink */
643 static int cifs_save_resume_key(const char *current_entry
,
644 struct cifsFileInfo
*cifsFile
)
647 unsigned int len
= 0;
651 if ((cifsFile
== NULL
) || (current_entry
== NULL
))
654 level
= cifsFile
->srch_inf
.info_level
;
656 if (level
== SMB_FIND_FILE_UNIX
) {
657 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
659 filename
= &pFindData
->FileName
[0];
660 if (cifsFile
->srch_inf
.unicode
) {
661 len
= cifs_unicode_bytelen(filename
);
663 /* BB should we make this strnlen of PATH_MAX? */
664 len
= strnlen(filename
, PATH_MAX
);
666 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
667 } else if (level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
668 FILE_DIRECTORY_INFO
*pFindData
=
669 (FILE_DIRECTORY_INFO
*)current_entry
;
670 filename
= &pFindData
->FileName
[0];
671 len
= le32_to_cpu(pFindData
->FileNameLength
);
672 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
673 } else if (level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
674 FILE_FULL_DIRECTORY_INFO
*pFindData
=
675 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
676 filename
= &pFindData
->FileName
[0];
677 len
= le32_to_cpu(pFindData
->FileNameLength
);
678 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
679 } else if (level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
680 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
681 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
682 filename
= &pFindData
->FileName
[0];
683 len
= le32_to_cpu(pFindData
->FileNameLength
);
684 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
685 } else if (level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
686 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
687 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
688 filename
= &pFindData
->FileName
[0];
689 len
= le32_to_cpu(pFindData
->FileNameLength
);
690 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
691 } else if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
692 FIND_FILE_STANDARD_INFO
*pFindData
=
693 (FIND_FILE_STANDARD_INFO
*)current_entry
;
694 filename
= &pFindData
->FileName
[0];
695 /* one byte length, no name conversion */
696 len
= (unsigned int)pFindData
->FileNameLength
;
697 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
699 cFYI(1, ("Unknown findfirst level %d", level
));
702 cifsFile
->srch_inf
.resume_name_len
= len
;
703 cifsFile
->srch_inf
.presume_name
= filename
;
707 /* find the corresponding entry in the search */
708 /* Note that the SMB server returns search entries for . and .. which
709 complicates logic here if we choose to parse for them and we do not
710 assume that they are located in the findfirst return buffer.*/
711 /* We start counting in the buffer with entry 2 and increment for every
712 entry (do not increment for . or .. entry) */
713 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
714 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
718 loff_t first_entry_in_buffer
;
719 loff_t index_to_find
= file
->f_pos
;
720 struct cifsFileInfo
*cifsFile
= file
->private_data
;
721 /* check if index in the buffer */
723 if ((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
724 (num_to_ret
== NULL
))
727 *ppCurrentEntry
= NULL
;
728 first_entry_in_buffer
=
729 cifsFile
->srch_inf
.index_of_last_entry
-
730 cifsFile
->srch_inf
.entries_in_buffer
;
732 /* if first entry in buf is zero then is first buffer
733 in search response data which means it is likely . and ..
734 will be in this buffer, although some servers do not return
735 . and .. for the root of a drive and for those we need
736 to start two entries earlier */
738 dump_cifs_file_struct(file
, "In fce ");
739 if (((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
740 is_dir_changed(file
)) ||
741 (index_to_find
< first_entry_in_buffer
)) {
742 /* close and restart search */
743 cFYI(1, ("search backing up - close and restart search"));
744 write_lock(&GlobalSMBSeslock
);
745 if (!cifsFile
->srch_inf
.endOfSearch
&&
746 !cifsFile
->invalidHandle
) {
747 cifsFile
->invalidHandle
= true;
748 write_unlock(&GlobalSMBSeslock
);
749 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
751 write_unlock(&GlobalSMBSeslock
);
752 if (cifsFile
->srch_inf
.ntwrk_buf_start
) {
753 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
754 if (cifsFile
->srch_inf
.smallBuf
)
755 cifs_small_buf_release(cifsFile
->srch_inf
.
758 cifs_buf_release(cifsFile
->srch_inf
.
760 cifsFile
->srch_inf
.ntwrk_buf_start
= NULL
;
762 rc
= initiate_cifs_search(xid
, file
);
764 cFYI(1, ("error %d reinitiating a search on rewind",
768 cifs_save_resume_key(cifsFile
->srch_inf
.last_entry
, cifsFile
);
771 while ((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
772 (rc
== 0) && !cifsFile
->srch_inf
.endOfSearch
) {
773 cFYI(1, ("calling findnext2"));
774 rc
= CIFSFindNext(xid
, pTcon
, cifsFile
->netfid
,
775 &cifsFile
->srch_inf
);
776 cifs_save_resume_key(cifsFile
->srch_inf
.last_entry
, cifsFile
);
780 if (index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
781 /* we found the buffer that contains the entry */
782 /* scan and find it */
785 char *end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
786 smbCalcSize((struct smb_hdr
*)
787 cifsFile
->srch_inf
.ntwrk_buf_start
);
789 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
790 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
791 - cifsFile
->srch_inf
.entries_in_buffer
;
792 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
793 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf
));
795 for (i
= 0; (i
< (pos_in_buf
)) && (current_entry
!= NULL
); i
++) {
796 /* go entry by entry figuring out which is first */
797 current_entry
= nxt_dir_entry(current_entry
, end_of_smb
,
798 cifsFile
->srch_inf
.info_level
);
800 if ((current_entry
== NULL
) && (i
< pos_in_buf
)) {
801 /* BB fixme - check if we should flag this error */
802 cERROR(1, ("reached end of buf searching for pos in buf"
803 " %d index to find %lld rc %d",
804 pos_in_buf
, index_to_find
, rc
));
807 *ppCurrentEntry
= current_entry
;
809 cFYI(1, ("index not in buffer - could not findnext into it"));
813 if (pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
814 cFYI(1, ("can not return entries pos_in_buf beyond last"));
817 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
822 /* inode num, inode type and filename returned */
823 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
824 char *current_entry
, __u16 level
, unsigned int unicode
,
825 struct cifs_sb_info
*cifs_sb
, int max_len
, __u64
*pinum
)
828 unsigned int len
= 0;
830 struct nls_table
*nlt
= cifs_sb
->local_nls
;
834 if (level
== SMB_FIND_FILE_UNIX
) {
835 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
837 filename
= &pFindData
->FileName
[0];
839 len
= cifs_unicode_bytelen(filename
);
841 /* BB should we make this strnlen of PATH_MAX? */
842 len
= strnlen(filename
, PATH_MAX
);
845 *pinum
= le64_to_cpu(pFindData
->UniqueId
);
846 } else if (level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
847 FILE_DIRECTORY_INFO
*pFindData
=
848 (FILE_DIRECTORY_INFO
*)current_entry
;
849 filename
= &pFindData
->FileName
[0];
850 len
= le32_to_cpu(pFindData
->FileNameLength
);
851 } else if (level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
852 FILE_FULL_DIRECTORY_INFO
*pFindData
=
853 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
854 filename
= &pFindData
->FileName
[0];
855 len
= le32_to_cpu(pFindData
->FileNameLength
);
856 } else if (level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
857 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
858 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
859 filename
= &pFindData
->FileName
[0];
860 len
= le32_to_cpu(pFindData
->FileNameLength
);
861 *pinum
= le64_to_cpu(pFindData
->UniqueId
);
862 } else if (level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
863 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
864 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
865 filename
= &pFindData
->FileName
[0];
866 len
= le32_to_cpu(pFindData
->FileNameLength
);
867 } else if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
868 FIND_FILE_STANDARD_INFO
*pFindData
=
869 (FIND_FILE_STANDARD_INFO
*)current_entry
;
870 filename
= &pFindData
->FileName
[0];
871 /* one byte length, no name conversion */
872 len
= (unsigned int)pFindData
->FileNameLength
;
874 cFYI(1, ("Unknown findfirst level %d", level
));
879 cERROR(1, ("bad search response length %d past smb end", len
));
884 /* BB fixme - test with long names */
885 /* Note converted filename can be longer than in unicode */
886 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
887 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
888 (__le16
*)filename
, len
/2, nlt
);
890 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
891 (__le16
*)filename
, len
/2, nlt
);
893 pqst
->name
= filename
;
896 pqst
->hash
= full_name_hash(pqst
->name
, pqst
->len
);
897 /* cFYI(1, ("filldir on %s",pqst->name)); */
901 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
902 filldir_t filldir
, void *direntry
, char *scratch_buf
, int max_len
)
906 struct cifsFileInfo
*pCifsF
;
907 unsigned int obj_type
;
909 struct cifs_sb_info
*cifs_sb
;
910 struct inode
*tmp_inode
;
911 struct dentry
*tmp_dentry
;
913 /* get filename and len into qstring */
915 /* decide whether to create and populate ionde */
916 if ((direntry
== NULL
) || (file
== NULL
))
919 pCifsF
= file
->private_data
;
921 if ((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
924 rc
= cifs_entry_is_dot(pfindEntry
, pCifsF
);
925 /* skip . and .. since we added them first */
929 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
931 qstring
.name
= scratch_buf
;
932 rc
= cifs_get_name_from_search_buf(&qstring
, pfindEntry
,
933 pCifsF
->srch_inf
.info_level
,
934 pCifsF
->srch_inf
.unicode
, cifs_sb
,
936 &inum
/* returned */);
941 /* only these two infolevels return valid inode numbers */
942 if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
||
943 pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
)
944 rc
= construct_dentry(&qstring
, file
, &tmp_inode
, &tmp_dentry
,
947 rc
= construct_dentry(&qstring
, file
, &tmp_inode
, &tmp_dentry
,
950 if ((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
953 /* we pass in rc below, indicating whether it is a new inode,
954 so we can figure out whether to invalidate the inode cached
955 data if the file has changed */
956 if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
)
957 unix_fill_in_inode(tmp_inode
,
958 (FILE_UNIX_INFO
*)pfindEntry
,
960 else if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
)
961 fill_in_inode(tmp_inode
, 0 /* old level 1 buffer type */,
962 pfindEntry
, &obj_type
, rc
);
964 fill_in_inode(tmp_inode
, 1 /* NT */, pfindEntry
, &obj_type
, rc
);
966 if (rc
) /* new inode - needs to be tied to dentry */ {
967 d_instantiate(tmp_dentry
, tmp_inode
);
969 d_rehash(tmp_dentry
);
973 rc
= filldir(direntry
, qstring
.name
, qstring
.len
, file
->f_pos
,
974 tmp_inode
->i_ino
, obj_type
);
976 cFYI(1, ("filldir rc = %d", rc
));
977 /* we can not return filldir errors to the caller
978 since they are "normal" when the stat blocksize
979 is too small - we return remapped error instead */
988 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
992 struct cifs_sb_info
*cifs_sb
;
993 struct cifsTconInfo
*pTcon
;
994 struct cifsFileInfo
*cifsFile
= NULL
;
997 char *tmp_buf
= NULL
;
1003 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
1004 pTcon
= cifs_sb
->tcon
;
1008 switch ((int) file
->f_pos
) {
1010 if (filldir(direntry
, ".", 1, file
->f_pos
,
1011 file
->f_path
.dentry
->d_inode
->i_ino
, DT_DIR
) < 0) {
1012 cERROR(1, ("Filldir for current dir failed"));
1018 if (filldir(direntry
, "..", 2, file
->f_pos
,
1019 file
->f_path
.dentry
->d_parent
->d_inode
->i_ino
, DT_DIR
) < 0) {
1020 cERROR(1, ("Filldir for parent dir failed"));
1026 /* 1) If search is active,
1027 is in current search buffer?
1028 if it before then restart search
1029 if after then keep searching till find it */
1031 if (file
->private_data
== NULL
) {
1032 rc
= initiate_cifs_search(xid
, file
);
1033 cFYI(1, ("initiate cifs search rc %d", rc
));
1039 if (file
->private_data
== NULL
) {
1044 cifsFile
= file
->private_data
;
1045 if (cifsFile
->srch_inf
.endOfSearch
) {
1046 if (cifsFile
->srch_inf
.emptyDir
) {
1047 cFYI(1, ("End of search, empty dir"));
1052 cifsFile->invalidHandle = true;
1053 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1056 rc
= find_cifs_entry(xid
, pTcon
, file
,
1057 ¤t_entry
, &num_to_fill
);
1059 cFYI(1, ("fce error %d", rc
));
1061 } else if (current_entry
!= NULL
) {
1062 cFYI(1, ("entry %lld found", file
->f_pos
));
1064 cFYI(1, ("could not find entry"));
1067 cFYI(1, ("loop through %d times filling dir for net buf %p",
1068 num_to_fill
, cifsFile
->srch_inf
.ntwrk_buf_start
));
1069 max_len
= smbCalcSize((struct smb_hdr
*)
1070 cifsFile
->srch_inf
.ntwrk_buf_start
);
1071 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
1073 /* To be safe - for UCS to UTF-8 with strings loaded
1074 with the rare long characters alloc more to account for
1075 such multibyte target UTF-8 characters. cifs_unicode.c,
1076 which actually does the conversion, has the same limit */
1077 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
1078 for (i
= 0; (i
< num_to_fill
) && (rc
== 0); i
++) {
1079 if (current_entry
== NULL
) {
1080 /* evaluate whether this case is an error */
1081 cERROR(1, ("past SMB end, num to fill %d i %d",
1085 /* if buggy server returns . and .. late do
1086 we want to check for that here? */
1087 rc
= cifs_filldir(current_entry
, file
,
1088 filldir
, direntry
, tmp_buf
, max_len
);
1089 if (rc
== -EOVERFLOW
) {
1096 cifsFile
->srch_inf
.index_of_last_entry
) {
1097 cFYI(1, ("last entry in buf at pos %lld %s",
1098 file
->f_pos
, tmp_buf
));
1099 cifs_save_resume_key(current_entry
, cifsFile
);
1103 nxt_dir_entry(current_entry
, end_of_smb
,
1104 cifsFile
->srch_inf
.info_level
);