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 spin_lock(&tmp_inode
->i_lock
);
243 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
244 /* can not safely change the file size here if the
245 client is writing to it due to potential races */
246 i_size_write(tmp_inode
, end_of_file
);
248 /* 512 bytes (2**9) is the fake blocksize that must be used */
249 /* for this calculation, even though the reported blocksize is larger */
250 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
252 spin_unlock(&tmp_inode
->i_lock
);
254 if (allocation_size
< end_of_file
)
255 cFYI(1, ("May be sparse file, allocation less than file size"));
256 cFYI(1, ("File Size %ld and blocks %llu",
257 (unsigned long)tmp_inode
->i_size
,
258 (unsigned long long)tmp_inode
->i_blocks
));
259 if (S_ISREG(tmp_inode
->i_mode
)) {
260 cFYI(1, ("File inode"));
261 tmp_inode
->i_op
= &cifs_file_inode_ops
;
262 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
263 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
264 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
266 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
267 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
268 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
270 tmp_inode
->i_fop
= &cifs_file_ops
;
272 if ((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
273 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
274 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
275 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
277 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
280 return; /* No sense invalidating pages for new inode
281 since have not started caching readahead file
284 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
285 (local_size
== tmp_inode
->i_size
)) {
286 cFYI(1, ("inode exists but unchanged"));
288 /* file may have changed on server */
289 cFYI(1, ("invalidate inode, readdir detected change"));
290 invalidate_remote_inode(tmp_inode
);
292 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
293 cFYI(1, ("Directory inode"));
294 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
295 tmp_inode
->i_fop
= &cifs_dir_ops
;
296 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
297 cFYI(1, ("Symbolic Link inode"));
298 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
300 cFYI(1, ("Init special inode"));
301 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
306 static void unix_fill_in_inode(struct inode
*tmp_inode
,
307 FILE_UNIX_INFO
*pfindData
, unsigned int *pobject_type
, int isNewInode
)
310 struct timespec local_mtime
;
312 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
313 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
315 __u32 type
= le32_to_cpu(pfindData
->Type
);
316 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
317 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
318 cifsInfo
->time
= jiffies
;
319 atomic_inc(&cifsInfo
->inUse
);
321 /* save mtime and size */
322 local_mtime
= tmp_inode
->i_mtime
;
323 local_size
= tmp_inode
->i_size
;
326 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
328 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
330 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
332 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
333 /* since we set the inode type below we need to mask off type
334 to avoid strange results if bits above were corrupt */
335 tmp_inode
->i_mode
&= ~S_IFMT
;
336 if (type
== UNIX_FILE
) {
337 *pobject_type
= DT_REG
;
338 tmp_inode
->i_mode
|= S_IFREG
;
339 } else if (type
== UNIX_SYMLINK
) {
340 *pobject_type
= DT_LNK
;
341 tmp_inode
->i_mode
|= S_IFLNK
;
342 } else if (type
== UNIX_DIR
) {
343 *pobject_type
= DT_DIR
;
344 tmp_inode
->i_mode
|= S_IFDIR
;
345 } else if (type
== UNIX_CHARDEV
) {
346 *pobject_type
= DT_CHR
;
347 tmp_inode
->i_mode
|= S_IFCHR
;
348 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
349 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
350 } else if (type
== UNIX_BLOCKDEV
) {
351 *pobject_type
= DT_BLK
;
352 tmp_inode
->i_mode
|= S_IFBLK
;
353 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
354 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
355 } else if (type
== UNIX_FIFO
) {
356 *pobject_type
= DT_FIFO
;
357 tmp_inode
->i_mode
|= S_IFIFO
;
358 } else if (type
== UNIX_SOCKET
) {
359 *pobject_type
= DT_SOCK
;
360 tmp_inode
->i_mode
|= S_IFSOCK
;
362 /* safest to just call it a file */
363 *pobject_type
= DT_REG
;
364 tmp_inode
->i_mode
|= S_IFREG
;
365 cFYI(1, ("unknown inode type %d", type
));
368 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_UID
)
369 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
371 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
372 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_OVERR_GID
)
373 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
375 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
376 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
378 spin_lock(&tmp_inode
->i_lock
);
379 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
380 /* can not safely change the file size here if the
381 client is writing to it due to potential races */
382 i_size_write(tmp_inode
, end_of_file
);
384 /* 512 bytes (2**9) is the fake blocksize that must be used */
385 /* for this calculation, not the real blocksize */
386 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
388 spin_unlock(&tmp_inode
->i_lock
);
390 if (S_ISREG(tmp_inode
->i_mode
)) {
391 cFYI(1, ("File inode"));
392 tmp_inode
->i_op
= &cifs_file_inode_ops
;
394 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
395 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
396 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
398 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
399 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
400 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
402 tmp_inode
->i_fop
= &cifs_file_ops
;
404 if ((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
405 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
406 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
407 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
409 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
412 return; /* No sense invalidating pages for new inode
413 since we have not started caching readahead
414 file data for it yet */
416 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
417 (local_size
== tmp_inode
->i_size
)) {
418 cFYI(1, ("inode exists but unchanged"));
420 /* file may have changed on server */
421 cFYI(1, ("invalidate inode, readdir detected change"));
422 invalidate_remote_inode(tmp_inode
);
424 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
425 cFYI(1, ("Directory inode"));
426 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
427 tmp_inode
->i_fop
= &cifs_dir_ops
;
428 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
429 cFYI(1, ("Symbolic Link inode"));
430 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
431 /* tmp_inode->i_fop = *//* do not need to set to anything */
433 cFYI(1, ("Special inode"));
434 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
439 static int initiate_cifs_search(const int xid
, struct file
*file
)
443 struct cifsFileInfo
*cifsFile
;
444 struct cifs_sb_info
*cifs_sb
;
445 struct cifsTconInfo
*pTcon
;
447 if (file
->private_data
== NULL
) {
449 kzalloc(sizeof(struct cifsFileInfo
), GFP_KERNEL
);
452 if (file
->private_data
== NULL
)
454 cifsFile
= file
->private_data
;
455 cifsFile
->invalidHandle
= true;
456 cifsFile
->srch_inf
.endOfSearch
= false;
458 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
462 pTcon
= cifs_sb
->tcon
;
466 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
468 if (full_path
== NULL
)
471 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
474 /* test for Unix extensions */
475 /* but now check for them on the share/mount not on the SMB session */
476 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
478 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
479 else if ((pTcon
->ses
->capabilities
&
480 (CAP_NT_SMBS
| CAP_NT_FIND
)) == 0) {
481 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
482 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
483 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
484 } else /* not srvinos - BB fixme add check for backlevel? */ {
485 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
488 rc
= CIFSFindFirst(xid
, pTcon
, full_path
, cifs_sb
->local_nls
,
489 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
490 cifs_sb
->mnt_cifs_flags
&
491 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
493 cifsFile
->invalidHandle
= false;
494 if ((rc
== -EOPNOTSUPP
) &&
495 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
496 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
503 /* return length of unicode string in bytes */
504 static int cifs_unicode_bytelen(char *str
)
507 __le16
*ustr
= (__le16
*)str
;
509 for (len
= 0; len
<= PATH_MAX
; len
++) {
513 cFYI(1, ("Unicode string longer than PATH_MAX found"));
517 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
520 FILE_DIRECTORY_INFO
*pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
522 if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
523 FIND_FILE_STANDARD_INFO
*pfData
;
524 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
526 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
527 pfData
->FileNameLength
;
529 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
530 cFYI(1, ("new entry %p old entry %p", new_entry
, old_entry
));
531 /* validate that new_entry is not past end of SMB */
532 if (new_entry
>= end_of_smb
) {
534 ("search entry %p began after end of SMB %p old entry %p",
535 new_entry
, end_of_smb
, old_entry
));
537 } else if (((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
538 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
))
539 || ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
540 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
541 cERROR(1, ("search entry %p extends after end of SMB %p",
542 new_entry
, end_of_smb
));
549 #define UNICODE_DOT cpu_to_le16(0x2e)
551 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
552 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
555 char *filename
= NULL
;
558 if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
559 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
560 filename
= &pFindData
->FileName
[0];
561 if (cfile
->srch_inf
.unicode
) {
562 len
= cifs_unicode_bytelen(filename
);
564 /* BB should we make this strnlen of PATH_MAX? */
565 len
= strnlen(filename
, 5);
567 } else if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
568 FILE_DIRECTORY_INFO
*pFindData
=
569 (FILE_DIRECTORY_INFO
*)current_entry
;
570 filename
= &pFindData
->FileName
[0];
571 len
= le32_to_cpu(pFindData
->FileNameLength
);
572 } else if (cfile
->srch_inf
.info_level
==
573 SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
574 FILE_FULL_DIRECTORY_INFO
*pFindData
=
575 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
576 filename
= &pFindData
->FileName
[0];
577 len
= le32_to_cpu(pFindData
->FileNameLength
);
578 } else if (cfile
->srch_inf
.info_level
==
579 SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
580 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
581 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
582 filename
= &pFindData
->FileName
[0];
583 len
= le32_to_cpu(pFindData
->FileNameLength
);
584 } else if (cfile
->srch_inf
.info_level
==
585 SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
586 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
587 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
588 filename
= &pFindData
->FileName
[0];
589 len
= le32_to_cpu(pFindData
->FileNameLength
);
590 } else if (cfile
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
) {
591 FIND_FILE_STANDARD_INFO
*pFindData
=
592 (FIND_FILE_STANDARD_INFO
*)current_entry
;
593 filename
= &pFindData
->FileName
[0];
594 len
= pFindData
->FileNameLength
;
596 cFYI(1, ("Unknown findfirst level %d",
597 cfile
->srch_inf
.info_level
));
601 if (cfile
->srch_inf
.unicode
) {
602 __le16
*ufilename
= (__le16
*)filename
;
605 if (ufilename
[0] == UNICODE_DOT
)
607 } else if (len
== 4) {
609 if ((ufilename
[0] == UNICODE_DOT
)
610 && (ufilename
[1] == UNICODE_DOT
))
615 if (filename
[0] == '.')
617 } else if (len
== 2) {
618 if ((filename
[0] == '.') && (filename
[1] == '.'))
627 /* Check if directory that we are searching has changed so we can decide
628 whether we can use the cached search results from the previous search */
629 static int is_dir_changed(struct file
*file
)
631 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
632 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
634 if (cifsInfo
->time
== 0)
635 return 1; /* directory was changed, perhaps due to unlink */
641 static int cifs_save_resume_key(const char *current_entry
,
642 struct cifsFileInfo
*cifsFile
)
645 unsigned int len
= 0;
649 if ((cifsFile
== NULL
) || (current_entry
== NULL
))
652 level
= cifsFile
->srch_inf
.info_level
;
654 if (level
== SMB_FIND_FILE_UNIX
) {
655 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
657 filename
= &pFindData
->FileName
[0];
658 if (cifsFile
->srch_inf
.unicode
) {
659 len
= cifs_unicode_bytelen(filename
);
661 /* BB should we make this strnlen of PATH_MAX? */
662 len
= strnlen(filename
, PATH_MAX
);
664 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
665 } else if (level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
666 FILE_DIRECTORY_INFO
*pFindData
=
667 (FILE_DIRECTORY_INFO
*)current_entry
;
668 filename
= &pFindData
->FileName
[0];
669 len
= le32_to_cpu(pFindData
->FileNameLength
);
670 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
671 } else if (level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
672 FILE_FULL_DIRECTORY_INFO
*pFindData
=
673 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
674 filename
= &pFindData
->FileName
[0];
675 len
= le32_to_cpu(pFindData
->FileNameLength
);
676 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
677 } else if (level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
678 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
679 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
680 filename
= &pFindData
->FileName
[0];
681 len
= le32_to_cpu(pFindData
->FileNameLength
);
682 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
683 } else if (level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
684 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
685 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
686 filename
= &pFindData
->FileName
[0];
687 len
= le32_to_cpu(pFindData
->FileNameLength
);
688 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
689 } else if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
690 FIND_FILE_STANDARD_INFO
*pFindData
=
691 (FIND_FILE_STANDARD_INFO
*)current_entry
;
692 filename
= &pFindData
->FileName
[0];
693 /* one byte length, no name conversion */
694 len
= (unsigned int)pFindData
->FileNameLength
;
695 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
697 cFYI(1, ("Unknown findfirst level %d", level
));
700 cifsFile
->srch_inf
.resume_name_len
= len
;
701 cifsFile
->srch_inf
.presume_name
= filename
;
705 /* find the corresponding entry in the search */
706 /* Note that the SMB server returns search entries for . and .. which
707 complicates logic here if we choose to parse for them and we do not
708 assume that they are located in the findfirst return buffer.*/
709 /* We start counting in the buffer with entry 2 and increment for every
710 entry (do not increment for . or .. entry) */
711 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
712 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
716 loff_t first_entry_in_buffer
;
717 loff_t index_to_find
= file
->f_pos
;
718 struct cifsFileInfo
*cifsFile
= file
->private_data
;
719 /* check if index in the buffer */
721 if ((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
722 (num_to_ret
== NULL
))
725 *ppCurrentEntry
= NULL
;
726 first_entry_in_buffer
=
727 cifsFile
->srch_inf
.index_of_last_entry
-
728 cifsFile
->srch_inf
.entries_in_buffer
;
730 /* if first entry in buf is zero then is first buffer
731 in search response data which means it is likely . and ..
732 will be in this buffer, although some servers do not return
733 . and .. for the root of a drive and for those we need
734 to start two entries earlier */
736 dump_cifs_file_struct(file
, "In fce ");
737 if (((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
738 is_dir_changed(file
)) ||
739 (index_to_find
< first_entry_in_buffer
)) {
740 /* close and restart search */
741 cFYI(1, ("search backing up - close and restart search"));
742 write_lock(&GlobalSMBSeslock
);
743 if (!cifsFile
->srch_inf
.endOfSearch
&&
744 !cifsFile
->invalidHandle
) {
745 cifsFile
->invalidHandle
= true;
746 write_unlock(&GlobalSMBSeslock
);
747 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
749 write_unlock(&GlobalSMBSeslock
);
750 if (cifsFile
->srch_inf
.ntwrk_buf_start
) {
751 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
752 if (cifsFile
->srch_inf
.smallBuf
)
753 cifs_small_buf_release(cifsFile
->srch_inf
.
756 cifs_buf_release(cifsFile
->srch_inf
.
758 cifsFile
->srch_inf
.ntwrk_buf_start
= NULL
;
760 rc
= initiate_cifs_search(xid
, file
);
762 cFYI(1, ("error %d reinitiating a search on rewind",
766 cifs_save_resume_key(cifsFile
->srch_inf
.last_entry
, cifsFile
);
769 while ((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
770 (rc
== 0) && !cifsFile
->srch_inf
.endOfSearch
) {
771 cFYI(1, ("calling findnext2"));
772 rc
= CIFSFindNext(xid
, pTcon
, cifsFile
->netfid
,
773 &cifsFile
->srch_inf
);
774 cifs_save_resume_key(cifsFile
->srch_inf
.last_entry
, cifsFile
);
778 if (index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
779 /* we found the buffer that contains the entry */
780 /* scan and find it */
783 char *end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
784 smbCalcSize((struct smb_hdr
*)
785 cifsFile
->srch_inf
.ntwrk_buf_start
);
787 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
788 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
789 - cifsFile
->srch_inf
.entries_in_buffer
;
790 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
791 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf
));
793 for (i
= 0; (i
< (pos_in_buf
)) && (current_entry
!= NULL
); i
++) {
794 /* go entry by entry figuring out which is first */
795 current_entry
= nxt_dir_entry(current_entry
, end_of_smb
,
796 cifsFile
->srch_inf
.info_level
);
798 if ((current_entry
== NULL
) && (i
< pos_in_buf
)) {
799 /* BB fixme - check if we should flag this error */
800 cERROR(1, ("reached end of buf searching for pos in buf"
801 " %d index to find %lld rc %d",
802 pos_in_buf
, index_to_find
, rc
));
805 *ppCurrentEntry
= current_entry
;
807 cFYI(1, ("index not in buffer - could not findnext into it"));
811 if (pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
812 cFYI(1, ("can not return entries pos_in_buf beyond last"));
815 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
820 /* inode num, inode type and filename returned */
821 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
822 char *current_entry
, __u16 level
, unsigned int unicode
,
823 struct cifs_sb_info
*cifs_sb
, int max_len
, __u64
*pinum
)
826 unsigned int len
= 0;
828 struct nls_table
*nlt
= cifs_sb
->local_nls
;
832 if (level
== SMB_FIND_FILE_UNIX
) {
833 FILE_UNIX_INFO
*pFindData
= (FILE_UNIX_INFO
*)current_entry
;
835 filename
= &pFindData
->FileName
[0];
837 len
= cifs_unicode_bytelen(filename
);
839 /* BB should we make this strnlen of PATH_MAX? */
840 len
= strnlen(filename
, PATH_MAX
);
843 *pinum
= pFindData
->UniqueId
;
844 } else if (level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
845 FILE_DIRECTORY_INFO
*pFindData
=
846 (FILE_DIRECTORY_INFO
*)current_entry
;
847 filename
= &pFindData
->FileName
[0];
848 len
= le32_to_cpu(pFindData
->FileNameLength
);
849 } else if (level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
850 FILE_FULL_DIRECTORY_INFO
*pFindData
=
851 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
852 filename
= &pFindData
->FileName
[0];
853 len
= le32_to_cpu(pFindData
->FileNameLength
);
854 } else if (level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
855 SEARCH_ID_FULL_DIR_INFO
*pFindData
=
856 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
857 filename
= &pFindData
->FileName
[0];
858 len
= le32_to_cpu(pFindData
->FileNameLength
);
859 *pinum
= pFindData
->UniqueId
;
860 } else if (level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
861 FILE_BOTH_DIRECTORY_INFO
*pFindData
=
862 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
863 filename
= &pFindData
->FileName
[0];
864 len
= le32_to_cpu(pFindData
->FileNameLength
);
865 } else if (level
== SMB_FIND_FILE_INFO_STANDARD
) {
866 FIND_FILE_STANDARD_INFO
*pFindData
=
867 (FIND_FILE_STANDARD_INFO
*)current_entry
;
868 filename
= &pFindData
->FileName
[0];
869 /* one byte length, no name conversion */
870 len
= (unsigned int)pFindData
->FileNameLength
;
872 cFYI(1, ("Unknown findfirst level %d", level
));
877 cERROR(1, ("bad search response length %d past smb end", len
));
882 /* BB fixme - test with long names */
883 /* Note converted filename can be longer than in unicode */
884 if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
885 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
886 (__le16
*)filename
, len
/2, nlt
);
888 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
889 (__le16
*)filename
, len
/2, nlt
);
891 pqst
->name
= filename
;
894 pqst
->hash
= full_name_hash(pqst
->name
, pqst
->len
);
895 /* cFYI(1, ("filldir on %s",pqst->name)); */
899 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
900 filldir_t filldir
, void *direntry
, char *scratch_buf
, int max_len
)
904 struct cifsFileInfo
*pCifsF
;
905 unsigned int obj_type
;
907 struct cifs_sb_info
*cifs_sb
;
908 struct inode
*tmp_inode
;
909 struct dentry
*tmp_dentry
;
911 /* get filename and len into qstring */
913 /* decide whether to create and populate ionde */
914 if ((direntry
== NULL
) || (file
== NULL
))
917 pCifsF
= file
->private_data
;
919 if ((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
922 rc
= cifs_entry_is_dot(pfindEntry
, pCifsF
);
923 /* skip . and .. since we added them first */
927 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
929 qstring
.name
= scratch_buf
;
930 rc
= cifs_get_name_from_search_buf(&qstring
, pfindEntry
,
931 pCifsF
->srch_inf
.info_level
,
932 pCifsF
->srch_inf
.unicode
, cifs_sb
,
934 &inum
/* returned */);
939 /* only these two infolevels return valid inode numbers */
940 if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
||
941 pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
)
942 rc
= construct_dentry(&qstring
, file
, &tmp_inode
, &tmp_dentry
,
945 rc
= construct_dentry(&qstring
, file
, &tmp_inode
, &tmp_dentry
,
948 if ((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
951 /* we pass in rc below, indicating whether it is a new inode,
952 so we can figure out whether to invalidate the inode cached
953 data if the file has changed */
954 if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
)
955 unix_fill_in_inode(tmp_inode
,
956 (FILE_UNIX_INFO
*)pfindEntry
,
958 else if (pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
)
959 fill_in_inode(tmp_inode
, 0 /* old level 1 buffer type */,
960 pfindEntry
, &obj_type
, rc
);
962 fill_in_inode(tmp_inode
, 1 /* NT */, pfindEntry
, &obj_type
, rc
);
964 if (rc
) /* new inode - needs to be tied to dentry */ {
965 d_instantiate(tmp_dentry
, tmp_inode
);
967 d_rehash(tmp_dentry
);
971 rc
= filldir(direntry
, qstring
.name
, qstring
.len
, file
->f_pos
,
972 tmp_inode
->i_ino
, obj_type
);
974 cFYI(1, ("filldir rc = %d", rc
));
975 /* we can not return filldir errors to the caller
976 since they are "normal" when the stat blocksize
977 is too small - we return remapped error instead */
986 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
990 struct cifs_sb_info
*cifs_sb
;
991 struct cifsTconInfo
*pTcon
;
992 struct cifsFileInfo
*cifsFile
= NULL
;
995 char *tmp_buf
= NULL
;
1001 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
1002 pTcon
= cifs_sb
->tcon
;
1006 switch ((int) file
->f_pos
) {
1008 if (filldir(direntry
, ".", 1, file
->f_pos
,
1009 file
->f_path
.dentry
->d_inode
->i_ino
, DT_DIR
) < 0) {
1010 cERROR(1, ("Filldir for current dir failed"));
1016 if (filldir(direntry
, "..", 2, file
->f_pos
,
1017 file
->f_path
.dentry
->d_parent
->d_inode
->i_ino
, DT_DIR
) < 0) {
1018 cERROR(1, ("Filldir for parent dir failed"));
1024 /* 1) If search is active,
1025 is in current search buffer?
1026 if it before then restart search
1027 if after then keep searching till find it */
1029 if (file
->private_data
== NULL
) {
1030 rc
= initiate_cifs_search(xid
, file
);
1031 cFYI(1, ("initiate cifs search rc %d", rc
));
1037 if (file
->private_data
== NULL
) {
1042 cifsFile
= file
->private_data
;
1043 if (cifsFile
->srch_inf
.endOfSearch
) {
1044 if (cifsFile
->srch_inf
.emptyDir
) {
1045 cFYI(1, ("End of search, empty dir"));
1050 cifsFile->invalidHandle = true;
1051 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1054 rc
= find_cifs_entry(xid
, pTcon
, file
,
1055 ¤t_entry
, &num_to_fill
);
1057 cFYI(1, ("fce error %d", rc
));
1059 } else if (current_entry
!= NULL
) {
1060 cFYI(1, ("entry %lld found", file
->f_pos
));
1062 cFYI(1, ("could not find entry"));
1065 cFYI(1, ("loop through %d times filling dir for net buf %p",
1066 num_to_fill
, cifsFile
->srch_inf
.ntwrk_buf_start
));
1067 max_len
= smbCalcSize((struct smb_hdr
*)
1068 cifsFile
->srch_inf
.ntwrk_buf_start
);
1069 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
1071 /* To be safe - for UCS to UTF-8 with strings loaded
1072 with the rare long characters alloc more to account for
1073 such multibyte target UTF-8 characters. cifs_unicode.c,
1074 which actually does the conversion, has the same limit */
1075 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
1076 for (i
= 0; (i
< num_to_fill
) && (rc
== 0); i
++) {
1077 if (current_entry
== NULL
) {
1078 /* evaluate whether this case is an error */
1079 cERROR(1, ("past SMB end, num to fill %d i %d",
1083 /* if buggy server returns . and .. late do
1084 we want to check for that here? */
1085 rc
= cifs_filldir(current_entry
, file
,
1086 filldir
, direntry
, tmp_buf
, max_len
);
1087 if (rc
== -EOVERFLOW
) {
1094 cifsFile
->srch_inf
.index_of_last_entry
) {
1095 cFYI(1, ("last entry in buf at pos %lld %s",
1096 file
->f_pos
, tmp_buf
));
1097 cifs_save_resume_key(current_entry
, cifsFile
);
1101 nxt_dir_entry(current_entry
, end_of_smb
,
1102 cifsFile
->srch_inf
.info_level
);