4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2005
7 * Author(s): Steve French (sfrench@us.ibm.com)
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
24 #include <linux/stat.h>
25 #include <linux/smp_lock.h>
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
34 /* BB fixme - add debug wrappers around this function to disable it fixme BB */
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"));
48 if(cf->srch_inf.endOfSearch) {
49 cFYI(1,("end of search"));
51 if(cf->srch_inf.emptyDir) {
52 cFYI(1,("empty dir"));
58 /* Returns one if new inode created (which therefore needs to be hashed) */
59 /* Might check in the future if inode number changed so we can rehash inode */
60 static int construct_dentry(struct qstr
*qstring
, struct file
*file
,
61 struct inode
**ptmp_inode
, struct dentry
**pnew_dentry
)
63 struct dentry
*tmp_dentry
;
64 struct cifs_sb_info
*cifs_sb
;
65 struct cifsTconInfo
*pTcon
;
68 cFYI(1, ("For %s", qstring
->name
));
69 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
70 pTcon
= cifs_sb
->tcon
;
72 qstring
->hash
= full_name_hash(qstring
->name
, qstring
->len
);
73 tmp_dentry
= d_lookup(file
->f_dentry
, qstring
);
75 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry
->d_inode
));
76 *ptmp_inode
= tmp_dentry
->d_inode
;
77 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
78 if(*ptmp_inode
== NULL
) {
79 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
80 if(*ptmp_inode
== NULL
)
83 d_instantiate(tmp_dentry
, *ptmp_inode
);
86 tmp_dentry
= d_alloc(file
->f_dentry
, qstring
);
87 if(tmp_dentry
== NULL
) {
88 cERROR(1,("Failed allocating dentry"));
93 *ptmp_inode
= new_inode(file
->f_dentry
->d_sb
);
95 tmp_dentry
->d_op
= &cifs_ci_dentry_ops
;
97 tmp_dentry
->d_op
= &cifs_dentry_ops
;
98 if(*ptmp_inode
== NULL
)
101 d_instantiate(tmp_dentry
, *ptmp_inode
);
102 d_rehash(tmp_dentry
);
105 tmp_dentry
->d_time
= jiffies
;
106 *pnew_dentry
= tmp_dentry
;
110 static void fill_in_inode(struct inode
*tmp_inode
,
111 FILE_DIRECTORY_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
114 struct timespec local_mtime
;
116 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
117 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
118 __u32 attr
= le32_to_cpu(pfindData
->ExtFileAttributes
);
119 __u64 allocation_size
= le64_to_cpu(pfindData
->AllocationSize
);
120 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
122 cifsInfo
->cifsAttrs
= attr
;
123 cifsInfo
->time
= jiffies
;
125 /* save mtime and size */
126 local_mtime
= tmp_inode
->i_mtime
;
127 local_size
= tmp_inode
->i_size
;
129 /* Linux can not store file creation time unfortunately so ignore it */
131 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
133 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastWriteTime
));
135 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->ChangeTime
));
136 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
137 /* 2767 perms - indicate mandatory locking */
138 /* BB fill in uid and gid here? with help from winbind?
139 or retrieve from NTFS stream extended attribute */
140 if (atomic_read(&cifsInfo
->inUse
) == 0) {
141 tmp_inode
->i_uid
= cifs_sb
->mnt_uid
;
142 tmp_inode
->i_gid
= cifs_sb
->mnt_gid
;
143 /* set default mode. will override for dirs below */
144 tmp_inode
->i_mode
= cifs_sb
->mnt_file_mode
;
147 if (attr
& ATTR_DIRECTORY
) {
148 *pobject_type
= DT_DIR
;
149 /* override default perms since we do not lock dirs */
150 if(atomic_read(&cifsInfo
->inUse
) == 0) {
151 tmp_inode
->i_mode
= cifs_sb
->mnt_dir_mode
;
153 tmp_inode
->i_mode
|= S_IFDIR
;
154 } else if ((cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_UNX_EMUL
) &&
155 (attr
& ATTR_SYSTEM
) && (end_of_file
== 0)) {
156 *pobject_type
= DT_FIFO
;
157 tmp_inode
->i_mode
|= S_IFIFO
;
158 /* BB Finish for SFU style symlinks and devies */
159 /* } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
160 (attr & ATTR_SYSTEM) && ) { */
161 /* we no longer mark these because we could not follow them */
162 /* } else if (attr & ATTR_REPARSE) {
163 *pobject_type = DT_LNK;
164 tmp_inode->i_mode |= S_IFLNK; */
166 *pobject_type
= DT_REG
;
167 tmp_inode
->i_mode
|= S_IFREG
;
168 if (attr
& ATTR_READONLY
)
169 tmp_inode
->i_mode
&= ~(S_IWUGO
);
170 } /* could add code here - to validate if device or weird share type? */
172 /* can not fill in nlink here as in qpathinfo version and Unx search */
173 if (atomic_read(&cifsInfo
->inUse
) == 0) {
174 atomic_set(&cifsInfo
->inUse
, 1);
177 if (is_size_safe_to_change(cifsInfo
)) {
178 /* can not safely change the file size here if the
179 client is writing to it due to potential races */
180 i_size_write(tmp_inode
, end_of_file
);
182 /* 512 bytes (2**9) is the fake blocksize that must be used */
183 /* for this calculation, even though the reported blocksize is larger */
184 tmp_inode
->i_blocks
= (512 - 1 + allocation_size
) >> 9;
187 if (allocation_size
< end_of_file
)
188 cFYI(1, ("May be sparse file, allocation less than file size"));
190 ("File Size %ld and blocks %ld and blocksize %ld",
191 (unsigned long)tmp_inode
->i_size
, tmp_inode
->i_blocks
,
192 tmp_inode
->i_blksize
));
193 if (S_ISREG(tmp_inode
->i_mode
)) {
194 cFYI(1, ("File inode"));
195 tmp_inode
->i_op
= &cifs_file_inode_ops
;
196 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
197 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
199 tmp_inode
->i_fop
= &cifs_file_ops
;
200 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
201 tmp_inode
->i_fop
->lock
= NULL
;
202 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
205 return; /* No sense invalidating pages for new inode
206 since have not started caching readahead file
209 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
210 (local_size
== tmp_inode
->i_size
)) {
211 cFYI(1, ("inode exists but unchanged"));
213 /* file may have changed on server */
214 cFYI(1, ("invalidate inode, readdir detected change"));
215 invalidate_remote_inode(tmp_inode
);
217 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
218 cFYI(1, ("Directory inode"));
219 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
220 tmp_inode
->i_fop
= &cifs_dir_ops
;
221 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
222 cFYI(1, ("Symbolic Link inode"));
223 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
225 cFYI(1, ("Init special inode"));
226 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
231 static void unix_fill_in_inode(struct inode
*tmp_inode
,
232 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
235 struct timespec local_mtime
;
237 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
238 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
240 __u32 type
= le32_to_cpu(pfindData
->Type
);
241 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
242 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
243 cifsInfo
->time
= jiffies
;
244 atomic_inc(&cifsInfo
->inUse
);
246 /* save mtime and size */
247 local_mtime
= tmp_inode
->i_mtime
;
248 local_size
= tmp_inode
->i_size
;
251 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
253 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
255 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
257 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
258 if (type
== UNIX_FILE
) {
259 *pobject_type
= DT_REG
;
260 tmp_inode
->i_mode
|= S_IFREG
;
261 } else if (type
== UNIX_SYMLINK
) {
262 *pobject_type
= DT_LNK
;
263 tmp_inode
->i_mode
|= S_IFLNK
;
264 } else if (type
== UNIX_DIR
) {
265 *pobject_type
= DT_DIR
;
266 tmp_inode
->i_mode
|= S_IFDIR
;
267 } else if (type
== UNIX_CHARDEV
) {
268 *pobject_type
= DT_CHR
;
269 tmp_inode
->i_mode
|= S_IFCHR
;
270 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
271 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
272 } else if (type
== UNIX_BLOCKDEV
) {
273 *pobject_type
= DT_BLK
;
274 tmp_inode
->i_mode
|= S_IFBLK
;
275 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
276 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
277 } else if (type
== UNIX_FIFO
) {
278 *pobject_type
= DT_FIFO
;
279 tmp_inode
->i_mode
|= S_IFIFO
;
280 } else if (type
== UNIX_SOCKET
) {
281 *pobject_type
= DT_SOCK
;
282 tmp_inode
->i_mode
|= S_IFSOCK
;
285 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
286 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
287 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
289 if (is_size_safe_to_change(cifsInfo
)) {
290 /* can not safely change the file size here if the
291 client is writing to it due to potential races */
292 i_size_write(tmp_inode
,end_of_file
);
294 /* 512 bytes (2**9) is the fake blocksize that must be used */
295 /* for this calculation, not the real blocksize */
296 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
299 if (S_ISREG(tmp_inode
->i_mode
)) {
300 cFYI(1, ("File inode"));
301 tmp_inode
->i_op
= &cifs_file_inode_ops
;
302 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
303 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
305 tmp_inode
->i_fop
= &cifs_file_ops
;
306 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
307 tmp_inode
->i_fop
->lock
= NULL
;
308 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
311 return; /* No sense invalidating pages for new inode since we
312 have not started caching readahead file data yet */
314 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
315 (local_size
== tmp_inode
->i_size
)) {
316 cFYI(1, ("inode exists but unchanged"));
318 /* file may have changed on server */
319 cFYI(1, ("invalidate inode, readdir detected change"));
320 invalidate_remote_inode(tmp_inode
);
322 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
323 cFYI(1, ("Directory inode"));
324 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
325 tmp_inode
->i_fop
= &cifs_dir_ops
;
326 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
327 cFYI(1, ("Symbolic Link inode"));
328 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
329 /* tmp_inode->i_fop = *//* do not need to set to anything */
331 cFYI(1, ("Special inode"));
332 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
337 static int initiate_cifs_search(const int xid
, struct file
*file
)
341 struct cifsFileInfo
* cifsFile
;
342 struct cifs_sb_info
*cifs_sb
;
343 struct cifsTconInfo
*pTcon
;
345 if(file
->private_data
== NULL
) {
347 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
350 if(file
->private_data
== NULL
) {
353 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
355 cifsFile
= file
->private_data
;
356 cifsFile
->invalidHandle
= TRUE
;
357 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
359 if(file
->f_dentry
== NULL
)
362 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
366 pTcon
= cifs_sb
->tcon
;
370 down(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
371 full_path
= build_path_from_dentry(file
->f_dentry
);
372 up(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
374 if(full_path
== NULL
) {
378 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
381 /* test for Unix extensions */
382 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
383 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
384 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
385 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
386 } else /* not srvinos - BB fixme add check for backlevel? */ {
387 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
390 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
391 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
392 cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
394 cifsFile
->invalidHandle
= FALSE
;
395 if((rc
== -EOPNOTSUPP
) &&
396 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
397 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
404 /* return length of unicode string in bytes */
405 static int cifs_unicode_bytelen(char *str
)
408 __le16
* ustr
= (__le16
*)str
;
410 for(len
=0;len
<= PATH_MAX
;len
++) {
414 cFYI(1,("Unicode string longer than PATH_MAX found"));
418 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
)
421 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
423 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
424 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
425 /* validate that new_entry is not past end of SMB */
426 if(new_entry
>= end_of_smb
) {
428 ("search entry %p began after end of SMB %p old entry %p",
429 new_entry
, end_of_smb
, old_entry
));
431 } else if (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
) {
432 cERROR(1,("search entry %p extends after end of SMB %p",
433 new_entry
, end_of_smb
));
440 #define UNICODE_DOT cpu_to_le16(0x2e)
442 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
443 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
446 char * filename
= NULL
;
449 if(cfile
->srch_inf
.info_level
== 0x202) {
450 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
451 filename
= &pFindData
->FileName
[0];
452 if(cfile
->srch_inf
.unicode
) {
453 len
= cifs_unicode_bytelen(filename
);
455 /* BB should we make this strnlen of PATH_MAX? */
456 len
= strnlen(filename
, 5);
458 } else if(cfile
->srch_inf
.info_level
== 0x101) {
459 FILE_DIRECTORY_INFO
* pFindData
=
460 (FILE_DIRECTORY_INFO
*)current_entry
;
461 filename
= &pFindData
->FileName
[0];
462 len
= le32_to_cpu(pFindData
->FileNameLength
);
463 } else if(cfile
->srch_inf
.info_level
== 0x102) {
464 FILE_FULL_DIRECTORY_INFO
* pFindData
=
465 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
466 filename
= &pFindData
->FileName
[0];
467 len
= le32_to_cpu(pFindData
->FileNameLength
);
468 } else if(cfile
->srch_inf
.info_level
== 0x105) {
469 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
470 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
471 filename
= &pFindData
->FileName
[0];
472 len
= le32_to_cpu(pFindData
->FileNameLength
);
473 } else if(cfile
->srch_inf
.info_level
== 0x104) {
474 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
475 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
476 filename
= &pFindData
->FileName
[0];
477 len
= le32_to_cpu(pFindData
->FileNameLength
);
479 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
483 if(cfile
->srch_inf
.unicode
) {
484 __le16
*ufilename
= (__le16
*)filename
;
487 if(ufilename
[0] == UNICODE_DOT
)
489 } else if(len
== 4) {
491 if((ufilename
[0] == UNICODE_DOT
)
492 &&(ufilename
[1] == UNICODE_DOT
))
497 if(filename
[0] == '.')
499 } else if(len
== 2) {
500 if((filename
[0] == '.') && (filename
[1] == '.'))
509 /* find the corresponding entry in the search */
510 /* Note that the SMB server returns search entries for . and .. which
511 complicates logic here if we choose to parse for them and we do not
512 assume that they are located in the findfirst return buffer.*/
513 /* We start counting in the buffer with entry 2 and increment for every
514 entry (do not increment for . or .. entry) */
515 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
516 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
520 loff_t first_entry_in_buffer
;
521 loff_t index_to_find
= file
->f_pos
;
522 struct cifsFileInfo
* cifsFile
= file
->private_data
;
523 /* check if index in the buffer */
525 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) || (num_to_ret
== NULL
))
528 *ppCurrentEntry
= NULL
;
529 first_entry_in_buffer
=
530 cifsFile
->srch_inf
.index_of_last_entry
-
531 cifsFile
->srch_inf
.entries_in_buffer
;
532 /* dump_cifs_file_struct(file, "In fce ");*/
533 if(index_to_find
< first_entry_in_buffer
) {
534 /* close and restart search */
535 cFYI(1,("search backing up - close and restart search"));
536 cifsFile
->invalidHandle
= TRUE
;
537 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
538 kfree(cifsFile
->search_resume_name
);
539 cifsFile
->search_resume_name
= NULL
;
540 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
541 cFYI(1,("freeing SMB ff cache buf on search rewind"));
542 cifs_buf_release(cifsFile
->srch_inf
.ntwrk_buf_start
);
544 rc
= initiate_cifs_search(xid
,file
);
546 cFYI(1,("error %d reinitiating a search on rewind",rc
));
551 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
552 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
553 cFYI(1,("calling findnext2"));
554 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
555 &cifsFile
->srch_inf
);
559 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
560 /* we found the buffer that contains the entry */
561 /* scan and find it */
563 char * current_entry
;
564 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
565 smbCalcSize((struct smb_hdr
*)
566 cifsFile
->srch_inf
.ntwrk_buf_start
);
567 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
568 - cifsFile
->srch_inf
.entries_in_buffer
;
569 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
570 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
571 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
572 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
573 /* go entry by entry figuring out which is first */
576 rc
= cifs_entry_is_dot(current_entry
,cifsFile
);
577 if(rc
== 1) /* is . or .. so skip */ {
578 cFYI(1,("Entry is .")); /* BB removeme BB */
580 } else if (rc
== 2 ) {
581 cFYI(1,("Entry is ..")); /* BB removeme BB */
584 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
);
586 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
587 /* BB fixme - check if we should flag this error */
588 cERROR(1,("reached end of buf searching for pos in buf"
589 " %d index to find %lld rc %d",
590 pos_in_buf
,index_to_find
,rc
));
593 *ppCurrentEntry
= current_entry
;
595 cFYI(1,("index not in buffer - could not findnext into it"));
599 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
600 cFYI(1,("can not return entries when pos_in_buf beyond last entry"));
603 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
608 /* inode num, inode type and filename returned */
609 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
610 char *current_entry
, __u16 level
, unsigned int unicode
,
611 struct cifs_sb_info
* cifs_sb
, ino_t
*pinum
)
614 unsigned int len
= 0;
616 struct nls_table
* nlt
= cifs_sb
->local_nls
;
620 if(level
== SMB_FIND_FILE_UNIX
) {
621 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
623 filename
= &pFindData
->FileName
[0];
625 len
= cifs_unicode_bytelen(filename
);
627 /* BB should we make this strnlen of PATH_MAX? */
628 len
= strnlen(filename
, PATH_MAX
);
631 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
632 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
633 *pinum
= pFindData
->UniqueId
;
634 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
635 FILE_DIRECTORY_INFO
* pFindData
=
636 (FILE_DIRECTORY_INFO
*)current_entry
;
637 filename
= &pFindData
->FileName
[0];
638 len
= le32_to_cpu(pFindData
->FileNameLength
);
639 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
640 FILE_FULL_DIRECTORY_INFO
* pFindData
=
641 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
642 filename
= &pFindData
->FileName
[0];
643 len
= le32_to_cpu(pFindData
->FileNameLength
);
644 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
645 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
646 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
647 filename
= &pFindData
->FileName
[0];
648 len
= le32_to_cpu(pFindData
->FileNameLength
);
649 *pinum
= pFindData
->UniqueId
;
650 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
651 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
652 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
653 filename
= &pFindData
->FileName
[0];
654 len
= le32_to_cpu(pFindData
->FileNameLength
);
656 cFYI(1,("Unknown findfirst level %d",level
));
660 /* BB fixme - test with long names */
661 /* Note converted filename can be longer than in unicode */
662 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
663 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
664 (__le16
*)filename
, len
/2, nlt
);
666 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
667 (wchar_t *)filename
,len
/2,nlt
);
669 pqst
->name
= filename
;
672 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
673 /* cFYI(1,("filldir on %s",pqst->name)); */
677 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
678 filldir_t filldir
, void *direntry
, char *scratch_buf
)
682 struct cifsFileInfo
* pCifsF
;
685 struct cifs_sb_info
* cifs_sb
;
686 struct inode
*tmp_inode
;
687 struct dentry
*tmp_dentry
;
689 /* get filename and len into qstring */
691 /* decide whether to create and populate ionde */
692 if((direntry
== NULL
) || (file
== NULL
))
695 pCifsF
= file
->private_data
;
697 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
700 if(file
->f_dentry
== NULL
)
703 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
705 qstring
.name
= scratch_buf
;
706 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
707 pCifsF
->srch_inf
.info_level
,
708 pCifsF
->srch_inf
.unicode
,cifs_sb
,
709 &inum
/* returned */);
714 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
715 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
719 /* inode created, we need to hash it with right inode number */
721 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
722 tmp_inode
->i_ino
= inum
;
724 insert_inode_hash(tmp_inode
);
727 /* we pass in rc below, indicating whether it is a new inode,
728 so we can figure out whether to invalidate the inode cached
729 data if the file has changed */
730 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
731 unix_fill_in_inode(tmp_inode
,
732 (FILE_UNIX_INFO
*)pfindEntry
,&obj_type
, rc
);
734 fill_in_inode(tmp_inode
,
735 (FILE_DIRECTORY_INFO
*)pfindEntry
,&obj_type
, rc
);
738 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
739 tmp_inode
->i_ino
,obj_type
);
741 cFYI(1,("filldir rc = %d",rc
));
748 static int cifs_save_resume_key(const char *current_entry
,
749 struct cifsFileInfo
*cifsFile
)
752 unsigned int len
= 0;
756 if((cifsFile
== NULL
) || (current_entry
== NULL
))
759 level
= cifsFile
->srch_inf
.info_level
;
761 if(level
== SMB_FIND_FILE_UNIX
) {
762 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
764 filename
= &pFindData
->FileName
[0];
765 if(cifsFile
->srch_inf
.unicode
) {
766 len
= cifs_unicode_bytelen(filename
);
768 /* BB should we make this strnlen of PATH_MAX? */
769 len
= strnlen(filename
, PATH_MAX
);
771 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
772 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
773 FILE_DIRECTORY_INFO
* pFindData
=
774 (FILE_DIRECTORY_INFO
*)current_entry
;
775 filename
= &pFindData
->FileName
[0];
776 len
= le32_to_cpu(pFindData
->FileNameLength
);
777 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
778 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
779 FILE_FULL_DIRECTORY_INFO
* pFindData
=
780 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
781 filename
= &pFindData
->FileName
[0];
782 len
= le32_to_cpu(pFindData
->FileNameLength
);
783 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
784 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
785 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
786 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
787 filename
= &pFindData
->FileName
[0];
788 len
= le32_to_cpu(pFindData
->FileNameLength
);
789 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
790 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
791 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
792 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
793 filename
= &pFindData
->FileName
[0];
794 len
= le32_to_cpu(pFindData
->FileNameLength
);
795 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
797 cFYI(1,("Unknown findfirst level %d",level
));
800 cifsFile
->srch_inf
.resume_name_len
= len
;
801 cifsFile
->srch_inf
.presume_name
= filename
;
805 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
809 struct cifs_sb_info
*cifs_sb
;
810 struct cifsTconInfo
*pTcon
;
811 struct cifsFileInfo
*cifsFile
= NULL
;
812 char * current_entry
;
814 char * tmp_buf
= NULL
;
819 if(file
->f_dentry
== NULL
) {
824 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
825 pTcon
= cifs_sb
->tcon
;
830 switch ((int) file
->f_pos
) {
832 /*if (filldir(direntry, ".", 1, file->f_pos,
833 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
834 cERROR(1, ("Filldir for current dir failed "));
840 /* if (filldir(direntry, "..", 2, file->f_pos,
841 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
842 cERROR(1, ("Filldir for parent dir failed "));
848 /* 1) If search is active,
849 is in current search buffer?
850 if it before then restart search
851 if after then keep searching till find it */
853 if(file
->private_data
== NULL
) {
854 rc
= initiate_cifs_search(xid
,file
);
855 cFYI(1,("initiate cifs search rc %d",rc
));
862 if(file
->private_data
== NULL
) {
867 cifsFile
= file
->private_data
;
868 if (cifsFile
->srch_inf
.endOfSearch
) {
869 if(cifsFile
->srch_inf
.emptyDir
) {
870 cFYI(1, ("End of search, empty dir"));
875 cifsFile->invalidHandle = TRUE;
876 CIFSFindClose(xid, pTcon, cifsFile->netfid);
878 kfree(cifsFile->search_resume_name);
879 cifsFile->search_resume_name = NULL; */
881 /* BB account for . and .. in f_pos as special case */
883 rc
= find_cifs_entry(xid
,pTcon
, file
,
884 ¤t_entry
,&num_to_fill
);
886 cFYI(1,("fce error %d",rc
));
888 } else if (current_entry
!= NULL
) {
889 cFYI(1,("entry %lld found",file
->f_pos
));
891 cFYI(1,("could not find entry"));
894 cFYI(1,("loop through %d times filling dir for net buf %p",
895 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
896 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
897 smbCalcSize((struct smb_hdr
*)
898 cifsFile
->srch_inf
.ntwrk_buf_start
);
899 /* To be safe - for UCS to UTF-8 with strings loaded
900 with the rare long characters alloc more to account for
901 such multibyte target UTF-8 characters. cifs_unicode.c,
902 which actually does the conversion, has the same limit */
903 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
904 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
905 if(current_entry
== NULL
) {
906 /* evaluate whether this case is an error */
907 cERROR(1,("past end of SMB num to fill %d i %d",
912 rc
= cifs_filldir(current_entry
, file
,
913 filldir
, direntry
,tmp_buf
);
915 if(file
->f_pos
== cifsFile
->srch_inf
.index_of_last_entry
) {
916 cFYI(1,("last entry in buf at pos %lld %s",
917 file
->f_pos
,tmp_buf
)); /* BB removeme BB */
918 cifs_save_resume_key(current_entry
,cifsFile
);
921 current_entry
= nxt_dir_entry(current_entry
,