4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2007
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_path
.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_path
.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_path
.dentry
->d_sb
);
82 if(*ptmp_inode
== NULL
)
86 if(file
->f_path
.dentry
->d_sb
->s_flags
& MS_NOATIME
)
87 (*ptmp_inode
)->i_flags
|= S_NOATIME
| S_NOCMTIME
;
89 tmp_dentry
= d_alloc(file
->f_path
.dentry
, qstring
);
90 if(tmp_dentry
== NULL
) {
91 cERROR(1,("Failed allocating dentry"));
96 *ptmp_inode
= new_inode(file
->f_path
.dentry
->d_sb
);
98 tmp_dentry
->d_op
= &cifs_ci_dentry_ops
;
100 tmp_dentry
->d_op
= &cifs_dentry_ops
;
101 if(*ptmp_inode
== NULL
)
103 if(file
->f_path
.dentry
->d_sb
->s_flags
& MS_NOATIME
)
104 (*ptmp_inode
)->i_flags
|= S_NOATIME
| S_NOCMTIME
;
108 tmp_dentry
->d_time
= jiffies
;
109 *pnew_dentry
= tmp_dentry
;
113 static void AdjustForTZ(struct cifsTconInfo
* tcon
, struct inode
* inode
)
115 if((tcon
) && (tcon
->ses
) && (tcon
->ses
->server
)) {
116 inode
->i_ctime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
117 inode
->i_mtime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
118 inode
->i_atime
.tv_sec
+= tcon
->ses
->server
->timeAdj
;
124 static void fill_in_inode(struct inode
*tmp_inode
, int new_buf_type
,
125 char * buf
, int *pobject_type
, int isNewInode
)
128 struct timespec local_mtime
;
130 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
131 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
133 __u64 allocation_size
;
136 /* save mtime and size */
137 local_mtime
= tmp_inode
->i_mtime
;
138 local_size
= tmp_inode
->i_size
;
141 FILE_DIRECTORY_INFO
*pfindData
= (FILE_DIRECTORY_INFO
*)buf
;
143 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
144 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
145 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
147 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
149 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
151 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
152 } else { /* legacy, OS2 and DOS style */
153 /* struct timespec ts;*/
154 FIND_FILE_STANDARD_INFO
* pfindData
=
155 (FIND_FILE_STANDARD_INFO
*)buf
;
157 tmp_inode
->i_mtime
= cnvrtDosUnixTm(
158 le16_to_cpu(pfindData
->LastWriteDate
),
159 le16_to_cpu(pfindData
->LastWriteTime
));
160 tmp_inode
->i_atime
= cnvrtDosUnixTm(
161 le16_to_cpu(pfindData
->LastAccessDate
),
162 le16_to_cpu(pfindData
->LastAccessTime
));
163 tmp_inode
->i_ctime
= cnvrtDosUnixTm(
164 le16_to_cpu(pfindData
->LastWriteDate
),
165 le16_to_cpu(pfindData
->LastWriteTime
));
166 AdjustForTZ(cifs_sb
->tcon
, tmp_inode
);
167 attr
= le16_to_cpu(pfindData
->Attributes
);
168 allocation_size
= le32_to_cpu(pfindData
->AllocationSize
);
169 end_of_file
= le32_to_cpu(pfindData
->DataSize
);
172 /* Linux can not store file creation time unfortunately so ignore it */
174 cifsInfo
->cifsAttrs
= attr
;
175 cifsInfo
->time
= jiffies
;
177 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
178 /* 2767 perms - indicate mandatory locking */
179 /* BB fill in uid and gid here? with help from winbind?
180 or retrieve from NTFS stream extended attribute */
181 if (atomic_read(&cifsInfo
->inUse
) == 0) {
182 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
183 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
184 /* set default mode. will override for dirs below */
185 tmp_inode
->i_mode
= cifs_sb
->mnt_file_mode
;
187 /* mask off the type bits since it gets set
188 below and we do not want to get two type
190 tmp_inode
->i_mode
&= ~S_IFMT
;
193 if (attr
& ATTR_DIRECTORY
) {
194 *pobject_type
= DT_DIR
;
195 /* override default perms since we do not lock dirs */
196 if(atomic_read(&cifsInfo
->inUse
) == 0) {
197 tmp_inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
199 tmp_inode
->i_mode
|= S_IFDIR
;
200 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
201 (attr
& ATTR_SYSTEM
)) {
202 if (end_of_file
== 0) {
203 *pobject_type
= DT_FIFO
;
204 tmp_inode
->i_mode
|= S_IFIFO
;
206 /* rather than get the type here, we mark the
207 inode as needing revalidate and get the real type
208 (blk vs chr vs. symlink) later ie in lookup */
209 *pobject_type
= DT_REG
;
210 tmp_inode
->i_mode
|= S_IFREG
;
213 /* we no longer mark these because we could not follow them */
214 /* } else if (attr & ATTR_REPARSE) {
215 *pobject_type = DT_LNK;
216 tmp_inode->i_mode |= S_IFLNK; */
218 *pobject_type
= DT_REG
;
219 tmp_inode
->i_mode
|= S_IFREG
;
220 if (attr
& ATTR_READONLY
)
221 tmp_inode
->i_mode
&= ~(S_IWUGO
);
222 else if ((tmp_inode
->i_mode
& S_IWUGO
) == 0)
223 /* the ATTR_READONLY flag may have been changed on */
224 /* server -- set any w bits allowed by mnt_file_mode */
225 tmp_inode
->i_mode
|= (S_IWUGO
& cifs_sb
->mnt_file_mode
);
226 } /* could add code here - to validate if device or weird share type? */
228 /* can not fill in nlink here as in qpathinfo version and Unx search */
229 if (atomic_read(&cifsInfo
->inUse
) == 0) {
230 atomic_set(&cifsInfo
->inUse
, 1);
233 spin_lock(&tmp_inode
->i_lock
);
234 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
235 /* can not safely change the file size here if the
236 client is writing to it due to potential races */
237 i_size_write(tmp_inode
, end_of_file
);
239 /* 512 bytes (2**9) is the fake blocksize that must be used */
240 /* for this calculation, even though the reported blocksize is larger */
241 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
243 spin_unlock(&tmp_inode
->i_lock
);
245 if (allocation_size
< end_of_file
)
246 cFYI(1, ("May be sparse file, allocation less than file size"));
247 cFYI(1, ("File Size %ld and blocks %llu",
248 (unsigned long)tmp_inode
->i_size
,
249 (unsigned long long)tmp_inode
->i_blocks
));
250 if (S_ISREG(tmp_inode
->i_mode
)) {
251 cFYI(1, ("File inode"));
252 tmp_inode
->i_op
= &cifs_file_inode_ops
;
253 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
254 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
255 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
257 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
259 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
260 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
262 tmp_inode
->i_fop
= &cifs_file_ops
;
264 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
265 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
266 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
267 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
269 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
272 return; /* No sense invalidating pages for new inode
273 since have not started caching readahead file
276 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
277 (local_size
== tmp_inode
->i_size
)) {
278 cFYI(1, ("inode exists but unchanged"));
280 /* file may have changed on server */
281 cFYI(1, ("invalidate inode, readdir detected change"));
282 invalidate_remote_inode(tmp_inode
);
284 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
285 cFYI(1, ("Directory inode"));
286 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
287 tmp_inode
->i_fop
= &cifs_dir_ops
;
288 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
289 cFYI(1, ("Symbolic Link inode"));
290 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
292 cFYI(1, ("Init special inode"));
293 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
298 static void unix_fill_in_inode(struct inode
*tmp_inode
,
299 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
302 struct timespec local_mtime
;
304 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
305 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
307 __u32 type
= le32_to_cpu(pfindData
->Type
);
308 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
309 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
310 cifsInfo
->time
= jiffies
;
311 atomic_inc(&cifsInfo
->inUse
);
313 /* save mtime and size */
314 local_mtime
= tmp_inode
->i_mtime
;
315 local_size
= tmp_inode
->i_size
;
318 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
320 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
322 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
324 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
325 /* since we set the inode type below we need to mask off type
326 to avoid strange results if bits above were corrupt */
327 tmp_inode
->i_mode
&= ~S_IFMT
;
328 if (type
== UNIX_FILE
) {
329 *pobject_type
= DT_REG
;
330 tmp_inode
->i_mode
|= S_IFREG
;
331 } else if (type
== UNIX_SYMLINK
) {
332 *pobject_type
= DT_LNK
;
333 tmp_inode
->i_mode
|= S_IFLNK
;
334 } else if (type
== UNIX_DIR
) {
335 *pobject_type
= DT_DIR
;
336 tmp_inode
->i_mode
|= S_IFDIR
;
337 } else if (type
== UNIX_CHARDEV
) {
338 *pobject_type
= DT_CHR
;
339 tmp_inode
->i_mode
|= S_IFCHR
;
340 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
341 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
342 } else if (type
== UNIX_BLOCKDEV
) {
343 *pobject_type
= DT_BLK
;
344 tmp_inode
->i_mode
|= S_IFBLK
;
345 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
346 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
347 } else if (type
== UNIX_FIFO
) {
348 *pobject_type
= DT_FIFO
;
349 tmp_inode
->i_mode
|= S_IFIFO
;
350 } else if (type
== UNIX_SOCKET
) {
351 *pobject_type
= DT_SOCK
;
352 tmp_inode
->i_mode
|= S_IFSOCK
;
354 /* safest to just call it a file */
355 *pobject_type
= DT_REG
;
356 tmp_inode
->i_mode
|= S_IFREG
;
357 cFYI(1,("unknown inode type %d",type
));
360 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
361 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
362 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
364 spin_lock(&tmp_inode
->i_lock
);
365 if (is_size_safe_to_change(cifsInfo
, end_of_file
)) {
366 /* can not safely change the file size here if the
367 client is writing to it due to potential races */
368 i_size_write(tmp_inode
, end_of_file
);
370 /* 512 bytes (2**9) is the fake blocksize that must be used */
371 /* for this calculation, not the real blocksize */
372 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
374 spin_unlock(&tmp_inode
->i_lock
);
376 if (S_ISREG(tmp_inode
->i_mode
)) {
377 cFYI(1, ("File inode"));
378 tmp_inode
->i_op
= &cifs_file_inode_ops
;
380 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
) {
381 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
382 tmp_inode
->i_fop
= &cifs_file_direct_nobrl_ops
;
384 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
386 } else if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
387 tmp_inode
->i_fop
= &cifs_file_nobrl_ops
;
389 tmp_inode
->i_fop
= &cifs_file_ops
;
391 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
392 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
393 PAGE_CACHE_SIZE
+ MAX_CIFS_HDR_SIZE
))
394 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops_smallbuf
;
396 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
399 return; /* No sense invalidating pages for new inode since we
400 have not started caching readahead file data yet */
402 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
403 (local_size
== tmp_inode
->i_size
)) {
404 cFYI(1, ("inode exists but unchanged"));
406 /* file may have changed on server */
407 cFYI(1, ("invalidate inode, readdir detected change"));
408 invalidate_remote_inode(tmp_inode
);
410 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
411 cFYI(1, ("Directory inode"));
412 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
413 tmp_inode
->i_fop
= &cifs_dir_ops
;
414 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
415 cFYI(1, ("Symbolic Link inode"));
416 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
417 /* tmp_inode->i_fop = *//* do not need to set to anything */
419 cFYI(1, ("Special inode"));
420 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
425 static int initiate_cifs_search(const int xid
, struct file
*file
)
429 struct cifsFileInfo
* cifsFile
;
430 struct cifs_sb_info
*cifs_sb
;
431 struct cifsTconInfo
*pTcon
;
433 if(file
->private_data
== NULL
) {
435 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
438 if(file
->private_data
== NULL
) {
441 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
443 cifsFile
= file
->private_data
;
444 cifsFile
->invalidHandle
= TRUE
;
445 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
447 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
451 pTcon
= cifs_sb
->tcon
;
455 full_path
= build_path_from_dentry(file
->f_path
.dentry
);
457 if(full_path
== NULL
) {
461 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
464 /* test for Unix extensions */
465 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
466 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
467 } else if ((pTcon
->ses
->capabilities
&
468 (CAP_NT_SMBS
| CAP_NT_FIND
)) == 0) {
469 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_INFO_STANDARD
;
470 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
471 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
472 } else /* not srvinos - BB fixme add check for backlevel? */ {
473 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
476 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
477 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
478 cifs_sb
->mnt_cifs_flags
&
479 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
481 cifsFile
->invalidHandle
= FALSE
;
482 if((rc
== -EOPNOTSUPP
) &&
483 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
484 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
491 /* return length of unicode string in bytes */
492 static int cifs_unicode_bytelen(char *str
)
495 __le16
* ustr
= (__le16
*)str
;
497 for(len
=0;len
<= PATH_MAX
;len
++) {
501 cFYI(1,("Unicode string longer than PATH_MAX found"));
505 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
, int level
)
508 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
510 if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
511 FIND_FILE_STANDARD_INFO
* pfData
;
512 pfData
= (FIND_FILE_STANDARD_INFO
*)pDirInfo
;
514 new_entry
= old_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) +
515 pfData
->FileNameLength
;
517 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
518 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
519 /* validate that new_entry is not past end of SMB */
520 if(new_entry
>= end_of_smb
) {
522 ("search entry %p began after end of SMB %p old entry %p",
523 new_entry
, end_of_smb
, old_entry
));
525 } else if(((level
== SMB_FIND_FILE_INFO_STANDARD
) &&
526 (new_entry
+ sizeof(FIND_FILE_STANDARD_INFO
) > end_of_smb
)) ||
527 ((level
!= SMB_FIND_FILE_INFO_STANDARD
) &&
528 (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
))) {
529 cERROR(1,("search entry %p extends after end of SMB %p",
530 new_entry
, end_of_smb
));
537 #define UNICODE_DOT cpu_to_le16(0x2e)
539 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
540 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
543 char * filename
= NULL
;
546 if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
547 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
548 filename
= &pFindData
->FileName
[0];
549 if(cfile
->srch_inf
.unicode
) {
550 len
= cifs_unicode_bytelen(filename
);
552 /* BB should we make this strnlen of PATH_MAX? */
553 len
= strnlen(filename
, 5);
555 } else if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
556 FILE_DIRECTORY_INFO
* pFindData
=
557 (FILE_DIRECTORY_INFO
*)current_entry
;
558 filename
= &pFindData
->FileName
[0];
559 len
= le32_to_cpu(pFindData
->FileNameLength
);
560 } else if(cfile
->srch_inf
.info_level
==
561 SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
562 FILE_FULL_DIRECTORY_INFO
* pFindData
=
563 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
564 filename
= &pFindData
->FileName
[0];
565 len
= le32_to_cpu(pFindData
->FileNameLength
);
566 } else if(cfile
->srch_inf
.info_level
==
567 SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
568 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
569 (SEARCH_ID_FULL_DIR_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_BOTH_DIRECTORY_INFO
) {
574 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
575 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
576 filename
= &pFindData
->FileName
[0];
577 len
= le32_to_cpu(pFindData
->FileNameLength
);
578 } else if(cfile
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
) {
579 FIND_FILE_STANDARD_INFO
* pFindData
=
580 (FIND_FILE_STANDARD_INFO
*)current_entry
;
581 filename
= &pFindData
->FileName
[0];
582 len
= pFindData
->FileNameLength
;
584 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
588 if(cfile
->srch_inf
.unicode
) {
589 __le16
*ufilename
= (__le16
*)filename
;
592 if(ufilename
[0] == UNICODE_DOT
)
594 } else if(len
== 4) {
596 if((ufilename
[0] == UNICODE_DOT
)
597 &&(ufilename
[1] == UNICODE_DOT
))
602 if(filename
[0] == '.')
604 } else if(len
== 2) {
605 if((filename
[0] == '.') && (filename
[1] == '.'))
614 /* Check if directory that we are searching has changed so we can decide
615 whether we can use the cached search results from the previous search */
616 static int is_dir_changed(struct file
* file
)
618 struct inode
*inode
= file
->f_path
.dentry
->d_inode
;
619 struct cifsInodeInfo
*cifsInfo
= CIFS_I(inode
);
621 if (cifsInfo
->time
== 0)
622 return 1; /* directory was changed, perhaps due to unlink */
628 /* find the corresponding entry in the search */
629 /* Note that the SMB server returns search entries for . and .. which
630 complicates logic here if we choose to parse for them and we do not
631 assume that they are located in the findfirst return buffer.*/
632 /* We start counting in the buffer with entry 2 and increment for every
633 entry (do not increment for . or .. entry) */
634 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
635 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
639 loff_t first_entry_in_buffer
;
640 loff_t index_to_find
= file
->f_pos
;
641 struct cifsFileInfo
* cifsFile
= file
->private_data
;
642 /* check if index in the buffer */
644 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
645 (num_to_ret
== NULL
))
648 *ppCurrentEntry
= NULL
;
649 first_entry_in_buffer
=
650 cifsFile
->srch_inf
.index_of_last_entry
-
651 cifsFile
->srch_inf
.entries_in_buffer
;
653 /* if first entry in buf is zero then is first buffer
654 in search response data which means it is likely . and ..
655 will be in this buffer, although some servers do not return
656 . and .. for the root of a drive and for those we need
657 to start two entries earlier */
659 #ifdef CONFIG_CIFS_DEBUG2
660 dump_cifs_file_struct(file
, "In fce ");
662 if(((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
663 is_dir_changed(file
)) ||
664 (index_to_find
< first_entry_in_buffer
)) {
665 /* close and restart search */
666 cFYI(1,("search backing up - close and restart search"));
667 cifsFile
->invalidHandle
= TRUE
;
668 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
669 kfree(cifsFile
->search_resume_name
);
670 cifsFile
->search_resume_name
= NULL
;
671 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
672 cFYI(1,("freeing SMB ff cache buf on search rewind"));
673 if(cifsFile
->srch_inf
.smallBuf
)
674 cifs_small_buf_release(cifsFile
->srch_inf
.
677 cifs_buf_release(cifsFile
->srch_inf
.
680 rc
= initiate_cifs_search(xid
,file
);
682 cFYI(1,("error %d reinitiating a search on rewind",rc
));
687 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
688 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
689 cFYI(1,("calling findnext2"));
690 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
691 &cifsFile
->srch_inf
);
695 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
696 /* we found the buffer that contains the entry */
697 /* scan and find it */
699 char * current_entry
;
700 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
701 smbCalcSize((struct smb_hdr
*)
702 cifsFile
->srch_inf
.ntwrk_buf_start
);
704 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
705 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
706 - cifsFile
->srch_inf
.entries_in_buffer
;
707 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
708 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
710 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
711 /* go entry by entry figuring out which is first */
712 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
,
713 cifsFile
->srch_inf
.info_level
);
715 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
716 /* BB fixme - check if we should flag this error */
717 cERROR(1,("reached end of buf searching for pos in buf"
718 " %d index to find %lld rc %d",
719 pos_in_buf
,index_to_find
,rc
));
722 *ppCurrentEntry
= current_entry
;
724 cFYI(1,("index not in buffer - could not findnext into it"));
728 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
729 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
732 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
737 /* inode num, inode type and filename returned */
738 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
739 char *current_entry
, __u16 level
, unsigned int unicode
,
740 struct cifs_sb_info
* cifs_sb
, int max_len
, ino_t
*pinum
)
743 unsigned int len
= 0;
745 struct nls_table
* nlt
= cifs_sb
->local_nls
;
749 if(level
== SMB_FIND_FILE_UNIX
) {
750 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
752 filename
= &pFindData
->FileName
[0];
754 len
= cifs_unicode_bytelen(filename
);
756 /* BB should we make this strnlen of PATH_MAX? */
757 len
= strnlen(filename
, PATH_MAX
);
760 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
761 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
762 *pinum
= pFindData
->UniqueId
;
763 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
764 FILE_DIRECTORY_INFO
* pFindData
=
765 (FILE_DIRECTORY_INFO
*)current_entry
;
766 filename
= &pFindData
->FileName
[0];
767 len
= le32_to_cpu(pFindData
->FileNameLength
);
768 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
769 FILE_FULL_DIRECTORY_INFO
* pFindData
=
770 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
771 filename
= &pFindData
->FileName
[0];
772 len
= le32_to_cpu(pFindData
->FileNameLength
);
773 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
774 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
775 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
776 filename
= &pFindData
->FileName
[0];
777 len
= le32_to_cpu(pFindData
->FileNameLength
);
778 *pinum
= pFindData
->UniqueId
;
779 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
780 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
781 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
782 filename
= &pFindData
->FileName
[0];
783 len
= le32_to_cpu(pFindData
->FileNameLength
);
784 } else if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
785 FIND_FILE_STANDARD_INFO
* pFindData
=
786 (FIND_FILE_STANDARD_INFO
*)current_entry
;
787 filename
= &pFindData
->FileName
[0];
788 /* one byte length, no name conversion */
789 len
= (unsigned int)pFindData
->FileNameLength
;
791 cFYI(1,("Unknown findfirst level %d",level
));
796 cERROR(1,("bad search response length %d past smb end", len
));
801 /* BB fixme - test with long names */
802 /* Note converted filename can be longer than in unicode */
803 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
804 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
805 (__le16
*)filename
, len
/2, nlt
);
807 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
808 (__le16
*)filename
,len
/2,nlt
);
810 pqst
->name
= filename
;
813 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
814 /* cFYI(1,("filldir on %s",pqst->name)); */
818 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
819 filldir_t filldir
, void *direntry
, char *scratch_buf
, int max_len
)
823 struct cifsFileInfo
* pCifsF
;
826 struct cifs_sb_info
* cifs_sb
;
827 struct inode
*tmp_inode
;
828 struct dentry
*tmp_dentry
;
830 /* get filename and len into qstring */
832 /* decide whether to create and populate ionde */
833 if((direntry
== NULL
) || (file
== NULL
))
836 pCifsF
= file
->private_data
;
838 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
841 rc
= cifs_entry_is_dot(pfindEntry
,pCifsF
);
842 /* skip . and .. since we added them first */
846 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
848 qstring
.name
= scratch_buf
;
849 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
850 pCifsF
->srch_inf
.info_level
,
851 pCifsF
->srch_inf
.unicode
,cifs_sb
,
853 &inum
/* returned */);
858 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
859 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
863 /* inode created, we need to hash it with right inode number */
865 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
866 tmp_inode
->i_ino
= inum
;
868 insert_inode_hash(tmp_inode
);
871 /* we pass in rc below, indicating whether it is a new inode,
872 so we can figure out whether to invalidate the inode cached
873 data if the file has changed */
874 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
)
875 unix_fill_in_inode(tmp_inode
,
876 (FILE_UNIX_INFO
*)pfindEntry
,
878 else if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_INFO_STANDARD
)
879 fill_in_inode(tmp_inode
, 0 /* old level 1 buffer type */,
880 pfindEntry
, &obj_type
, rc
);
882 fill_in_inode(tmp_inode
, 1 /* NT */, pfindEntry
, &obj_type
, rc
);
884 if(rc
) /* new inode - needs to be tied to dentry */ {
885 d_instantiate(tmp_dentry
, tmp_inode
);
887 d_rehash(tmp_dentry
);
891 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
892 tmp_inode
->i_ino
,obj_type
);
894 cFYI(1,("filldir rc = %d",rc
));
895 /* we can not return filldir errors to the caller
896 since they are "normal" when the stat blocksize
897 is too small - we return remapped error instead */
905 static int cifs_save_resume_key(const char *current_entry
,
906 struct cifsFileInfo
*cifsFile
)
909 unsigned int len
= 0;
913 if((cifsFile
== NULL
) || (current_entry
== NULL
))
916 level
= cifsFile
->srch_inf
.info_level
;
918 if(level
== SMB_FIND_FILE_UNIX
) {
919 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
921 filename
= &pFindData
->FileName
[0];
922 if(cifsFile
->srch_inf
.unicode
) {
923 len
= cifs_unicode_bytelen(filename
);
925 /* BB should we make this strnlen of PATH_MAX? */
926 len
= strnlen(filename
, PATH_MAX
);
928 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
929 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
930 FILE_DIRECTORY_INFO
* pFindData
=
931 (FILE_DIRECTORY_INFO
*)current_entry
;
932 filename
= &pFindData
->FileName
[0];
933 len
= le32_to_cpu(pFindData
->FileNameLength
);
934 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
935 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
936 FILE_FULL_DIRECTORY_INFO
* pFindData
=
937 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
938 filename
= &pFindData
->FileName
[0];
939 len
= le32_to_cpu(pFindData
->FileNameLength
);
940 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
941 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
942 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
943 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
944 filename
= &pFindData
->FileName
[0];
945 len
= le32_to_cpu(pFindData
->FileNameLength
);
946 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
947 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
948 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
949 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
950 filename
= &pFindData
->FileName
[0];
951 len
= le32_to_cpu(pFindData
->FileNameLength
);
952 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
953 } else if(level
== SMB_FIND_FILE_INFO_STANDARD
) {
954 FIND_FILE_STANDARD_INFO
* pFindData
=
955 (FIND_FILE_STANDARD_INFO
*)current_entry
;
956 filename
= &pFindData
->FileName
[0];
957 /* one byte length, no name conversion */
958 len
= (unsigned int)pFindData
->FileNameLength
;
959 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
961 cFYI(1,("Unknown findfirst level %d",level
));
964 cifsFile
->srch_inf
.resume_name_len
= len
;
965 cifsFile
->srch_inf
.presume_name
= filename
;
969 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
973 struct cifs_sb_info
*cifs_sb
;
974 struct cifsTconInfo
*pTcon
;
975 struct cifsFileInfo
*cifsFile
= NULL
;
976 char * current_entry
;
978 char * tmp_buf
= NULL
;
984 cifs_sb
= CIFS_SB(file
->f_path
.dentry
->d_sb
);
985 pTcon
= cifs_sb
->tcon
;
989 switch ((int) file
->f_pos
) {
991 if (filldir(direntry
, ".", 1, file
->f_pos
,
992 file
->f_path
.dentry
->d_inode
->i_ino
, DT_DIR
) < 0) {
993 cERROR(1, ("Filldir for current dir failed"));
999 if (filldir(direntry
, "..", 2, file
->f_pos
,
1000 file
->f_path
.dentry
->d_parent
->d_inode
->i_ino
, DT_DIR
) < 0) {
1001 cERROR(1, ("Filldir for parent dir failed"));
1007 /* 1) If search is active,
1008 is in current search buffer?
1009 if it before then restart search
1010 if after then keep searching till find it */
1012 if(file
->private_data
== NULL
) {
1013 rc
= initiate_cifs_search(xid
,file
);
1014 cFYI(1,("initiate cifs search rc %d",rc
));
1020 if(file
->private_data
== NULL
) {
1025 cifsFile
= file
->private_data
;
1026 if (cifsFile
->srch_inf
.endOfSearch
) {
1027 if(cifsFile
->srch_inf
.emptyDir
) {
1028 cFYI(1, ("End of search, empty dir"));
1033 cifsFile->invalidHandle = TRUE;
1034 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1036 kfree(cifsFile->search_resume_name);
1037 cifsFile->search_resume_name = NULL; */
1039 rc
= find_cifs_entry(xid
,pTcon
, file
,
1040 ¤t_entry
,&num_to_fill
);
1042 cFYI(1,("fce error %d",rc
));
1044 } else if (current_entry
!= NULL
) {
1045 cFYI(1,("entry %lld found",file
->f_pos
));
1047 cFYI(1,("could not find entry"));
1050 cFYI(1,("loop through %d times filling dir for net buf %p",
1051 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
1052 max_len
= smbCalcSize((struct smb_hdr
*)
1053 cifsFile
->srch_inf
.ntwrk_buf_start
);
1054 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+ max_len
;
1056 /* To be safe - for UCS to UTF-8 with strings loaded
1057 with the rare long characters alloc more to account for
1058 such multibyte target UTF-8 characters. cifs_unicode.c,
1059 which actually does the conversion, has the same limit */
1060 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
1061 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
1062 if(current_entry
== NULL
) {
1063 /* evaluate whether this case is an error */
1064 cERROR(1,("past end of SMB num to fill %d i %d",
1068 /* if buggy server returns . and .. late do
1069 we want to check for that here? */
1070 rc
= cifs_filldir(current_entry
, file
,
1071 filldir
, direntry
, tmp_buf
, max_len
);
1072 if(rc
== -EOVERFLOW
) {
1079 cifsFile
->srch_inf
.index_of_last_entry
) {
1080 cFYI(1,("last entry in buf at pos %lld %s",
1081 file
->f_pos
,tmp_buf
));
1082 cifs_save_resume_key(current_entry
,cifsFile
);
1086 nxt_dir_entry(current_entry
, end_of_smb
,
1087 cifsFile
->srch_inf
.info_level
);