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
;
203 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
204 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
205 4096 + MAX_CIFS_HDR_SIZE
))
206 tmp_inode
->i_data
.a_ops
->readpages
= NULL
;
208 return; /* No sense invalidating pages for new inode
209 since have not started caching readahead file
212 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
213 (local_size
== tmp_inode
->i_size
)) {
214 cFYI(1, ("inode exists but unchanged"));
216 /* file may have changed on server */
217 cFYI(1, ("invalidate inode, readdir detected change"));
218 invalidate_remote_inode(tmp_inode
);
220 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
221 cFYI(1, ("Directory inode"));
222 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
223 tmp_inode
->i_fop
= &cifs_dir_ops
;
224 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
225 cFYI(1, ("Symbolic Link inode"));
226 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
228 cFYI(1, ("Init special inode"));
229 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
234 static void unix_fill_in_inode(struct inode
*tmp_inode
,
235 FILE_UNIX_INFO
*pfindData
, int *pobject_type
, int isNewInode
)
238 struct timespec local_mtime
;
240 struct cifsInodeInfo
*cifsInfo
= CIFS_I(tmp_inode
);
241 struct cifs_sb_info
*cifs_sb
= CIFS_SB(tmp_inode
->i_sb
);
243 __u32 type
= le32_to_cpu(pfindData
->Type
);
244 __u64 num_of_bytes
= le64_to_cpu(pfindData
->NumOfBytes
);
245 __u64 end_of_file
= le64_to_cpu(pfindData
->EndOfFile
);
246 cifsInfo
->time
= jiffies
;
247 atomic_inc(&cifsInfo
->inUse
);
249 /* save mtime and size */
250 local_mtime
= tmp_inode
->i_mtime
;
251 local_size
= tmp_inode
->i_size
;
254 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastAccessTime
));
256 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastModificationTime
));
258 cifs_NTtimeToUnix(le64_to_cpu(pfindData
->LastStatusChange
));
260 tmp_inode
->i_mode
= le64_to_cpu(pfindData
->Permissions
);
261 if (type
== UNIX_FILE
) {
262 *pobject_type
= DT_REG
;
263 tmp_inode
->i_mode
|= S_IFREG
;
264 } else if (type
== UNIX_SYMLINK
) {
265 *pobject_type
= DT_LNK
;
266 tmp_inode
->i_mode
|= S_IFLNK
;
267 } else if (type
== UNIX_DIR
) {
268 *pobject_type
= DT_DIR
;
269 tmp_inode
->i_mode
|= S_IFDIR
;
270 } else if (type
== UNIX_CHARDEV
) {
271 *pobject_type
= DT_CHR
;
272 tmp_inode
->i_mode
|= S_IFCHR
;
273 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
274 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
275 } else if (type
== UNIX_BLOCKDEV
) {
276 *pobject_type
= DT_BLK
;
277 tmp_inode
->i_mode
|= S_IFBLK
;
278 tmp_inode
->i_rdev
= MKDEV(le64_to_cpu(pfindData
->DevMajor
),
279 le64_to_cpu(pfindData
->DevMinor
) & MINORMASK
);
280 } else if (type
== UNIX_FIFO
) {
281 *pobject_type
= DT_FIFO
;
282 tmp_inode
->i_mode
|= S_IFIFO
;
283 } else if (type
== UNIX_SOCKET
) {
284 *pobject_type
= DT_SOCK
;
285 tmp_inode
->i_mode
|= S_IFSOCK
;
288 tmp_inode
->i_uid
= le64_to_cpu(pfindData
->Uid
);
289 tmp_inode
->i_gid
= le64_to_cpu(pfindData
->Gid
);
290 tmp_inode
->i_nlink
= le64_to_cpu(pfindData
->Nlinks
);
292 if (is_size_safe_to_change(cifsInfo
)) {
293 /* can not safely change the file size here if the
294 client is writing to it due to potential races */
295 i_size_write(tmp_inode
,end_of_file
);
297 /* 512 bytes (2**9) is the fake blocksize that must be used */
298 /* for this calculation, not the real blocksize */
299 tmp_inode
->i_blocks
= (512 - 1 + num_of_bytes
) >> 9;
302 if (S_ISREG(tmp_inode
->i_mode
)) {
303 cFYI(1, ("File inode"));
304 tmp_inode
->i_op
= &cifs_file_inode_ops
;
305 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_DIRECT_IO
)
306 tmp_inode
->i_fop
= &cifs_file_direct_ops
;
308 tmp_inode
->i_fop
= &cifs_file_ops
;
309 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_NO_BRL
)
310 tmp_inode
->i_fop
->lock
= NULL
;
311 tmp_inode
->i_data
.a_ops
= &cifs_addr_ops
;
312 if((cifs_sb
->tcon
) && (cifs_sb
->tcon
->ses
) &&
313 (cifs_sb
->tcon
->ses
->server
->maxBuf
<
314 4096 + MAX_CIFS_HDR_SIZE
))
315 tmp_inode
->i_data
.a_ops
->readpages
= NULL
;
318 return; /* No sense invalidating pages for new inode since we
319 have not started caching readahead file data yet */
321 if (timespec_equal(&tmp_inode
->i_mtime
, &local_mtime
) &&
322 (local_size
== tmp_inode
->i_size
)) {
323 cFYI(1, ("inode exists but unchanged"));
325 /* file may have changed on server */
326 cFYI(1, ("invalidate inode, readdir detected change"));
327 invalidate_remote_inode(tmp_inode
);
329 } else if (S_ISDIR(tmp_inode
->i_mode
)) {
330 cFYI(1, ("Directory inode"));
331 tmp_inode
->i_op
= &cifs_dir_inode_ops
;
332 tmp_inode
->i_fop
= &cifs_dir_ops
;
333 } else if (S_ISLNK(tmp_inode
->i_mode
)) {
334 cFYI(1, ("Symbolic Link inode"));
335 tmp_inode
->i_op
= &cifs_symlink_inode_ops
;
336 /* tmp_inode->i_fop = *//* do not need to set to anything */
338 cFYI(1, ("Special inode"));
339 init_special_inode(tmp_inode
, tmp_inode
->i_mode
,
344 static int initiate_cifs_search(const int xid
, struct file
*file
)
348 struct cifsFileInfo
* cifsFile
;
349 struct cifs_sb_info
*cifs_sb
;
350 struct cifsTconInfo
*pTcon
;
352 if(file
->private_data
== NULL
) {
354 kmalloc(sizeof(struct cifsFileInfo
),GFP_KERNEL
);
357 if(file
->private_data
== NULL
) {
360 memset(file
->private_data
,0,sizeof(struct cifsFileInfo
));
362 cifsFile
= file
->private_data
;
363 cifsFile
->invalidHandle
= TRUE
;
364 cifsFile
->srch_inf
.endOfSearch
= FALSE
;
366 if(file
->f_dentry
== NULL
)
369 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
373 pTcon
= cifs_sb
->tcon
;
377 down(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
378 full_path
= build_path_from_dentry(file
->f_dentry
);
379 up(&file
->f_dentry
->d_sb
->s_vfs_rename_sem
);
381 if(full_path
== NULL
) {
385 cFYI(1, ("Full path: %s start at: %lld", full_path
, file
->f_pos
));
388 /* test for Unix extensions */
389 if (pTcon
->ses
->capabilities
& CAP_UNIX
) {
390 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_UNIX
;
391 } else if (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
) {
392 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_ID_FULL_DIR_INFO
;
393 } else /* not srvinos - BB fixme add check for backlevel? */ {
394 cifsFile
->srch_inf
.info_level
= SMB_FIND_FILE_DIRECTORY_INFO
;
397 rc
= CIFSFindFirst(xid
, pTcon
,full_path
,cifs_sb
->local_nls
,
398 &cifsFile
->netfid
, &cifsFile
->srch_inf
,
399 cifs_sb
->mnt_cifs_flags
&
400 CIFS_MOUNT_MAP_SPECIAL_CHR
, CIFS_DIR_SEP(cifs_sb
));
402 cifsFile
->invalidHandle
= FALSE
;
403 if((rc
== -EOPNOTSUPP
) &&
404 (cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)) {
405 cifs_sb
->mnt_cifs_flags
&= ~CIFS_MOUNT_SERVER_INUM
;
412 /* return length of unicode string in bytes */
413 static int cifs_unicode_bytelen(char *str
)
416 __le16
* ustr
= (__le16
*)str
;
418 for(len
=0;len
<= PATH_MAX
;len
++) {
422 cFYI(1,("Unicode string longer than PATH_MAX found"));
426 static char *nxt_dir_entry(char *old_entry
, char *end_of_smb
)
429 FILE_DIRECTORY_INFO
* pDirInfo
= (FILE_DIRECTORY_INFO
*)old_entry
;
431 new_entry
= old_entry
+ le32_to_cpu(pDirInfo
->NextEntryOffset
);
432 cFYI(1,("new entry %p old entry %p",new_entry
,old_entry
));
433 /* validate that new_entry is not past end of SMB */
434 if(new_entry
>= end_of_smb
) {
436 ("search entry %p began after end of SMB %p old entry %p",
437 new_entry
, end_of_smb
, old_entry
));
439 } else if (new_entry
+ sizeof(FILE_DIRECTORY_INFO
) > end_of_smb
) {
440 cERROR(1,("search entry %p extends after end of SMB %p",
441 new_entry
, end_of_smb
));
448 #define UNICODE_DOT cpu_to_le16(0x2e)
450 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
451 static int cifs_entry_is_dot(char *current_entry
, struct cifsFileInfo
*cfile
)
454 char * filename
= NULL
;
457 if(cfile
->srch_inf
.info_level
== 0x202) {
458 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
459 filename
= &pFindData
->FileName
[0];
460 if(cfile
->srch_inf
.unicode
) {
461 len
= cifs_unicode_bytelen(filename
);
463 /* BB should we make this strnlen of PATH_MAX? */
464 len
= strnlen(filename
, 5);
466 } else if(cfile
->srch_inf
.info_level
== 0x101) {
467 FILE_DIRECTORY_INFO
* pFindData
=
468 (FILE_DIRECTORY_INFO
*)current_entry
;
469 filename
= &pFindData
->FileName
[0];
470 len
= le32_to_cpu(pFindData
->FileNameLength
);
471 } else if(cfile
->srch_inf
.info_level
== 0x102) {
472 FILE_FULL_DIRECTORY_INFO
* pFindData
=
473 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
474 filename
= &pFindData
->FileName
[0];
475 len
= le32_to_cpu(pFindData
->FileNameLength
);
476 } else if(cfile
->srch_inf
.info_level
== 0x105) {
477 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
478 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
479 filename
= &pFindData
->FileName
[0];
480 len
= le32_to_cpu(pFindData
->FileNameLength
);
481 } else if(cfile
->srch_inf
.info_level
== 0x104) {
482 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
483 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
484 filename
= &pFindData
->FileName
[0];
485 len
= le32_to_cpu(pFindData
->FileNameLength
);
487 cFYI(1,("Unknown findfirst level %d",cfile
->srch_inf
.info_level
));
491 if(cfile
->srch_inf
.unicode
) {
492 __le16
*ufilename
= (__le16
*)filename
;
495 if(ufilename
[0] == UNICODE_DOT
)
497 } else if(len
== 4) {
499 if((ufilename
[0] == UNICODE_DOT
)
500 &&(ufilename
[1] == UNICODE_DOT
))
505 if(filename
[0] == '.')
507 } else if(len
== 2) {
508 if((filename
[0] == '.') && (filename
[1] == '.'))
517 /* Check if directory that we are searching has changed so we can decide
518 whether we can use the cached search results from the previous search */
519 static int is_dir_changed(struct file
* file
)
521 struct inode
* inode
;
522 struct cifsInodeInfo
*cifsInfo
;
524 if(file
->f_dentry
== NULL
)
527 inode
= file
->f_dentry
->d_inode
;
532 cifsInfo
= CIFS_I(inode
);
534 if(cifsInfo
->time
== 0)
535 return 1; /* directory was changed, perhaps due to unlink */
541 /* find the corresponding entry in the search */
542 /* Note that the SMB server returns search entries for . and .. which
543 complicates logic here if we choose to parse for them and we do not
544 assume that they are located in the findfirst return buffer.*/
545 /* We start counting in the buffer with entry 2 and increment for every
546 entry (do not increment for . or .. entry) */
547 static int find_cifs_entry(const int xid
, struct cifsTconInfo
*pTcon
,
548 struct file
*file
, char **ppCurrentEntry
, int *num_to_ret
)
552 loff_t first_entry_in_buffer
;
553 loff_t index_to_find
= file
->f_pos
;
554 struct cifsFileInfo
* cifsFile
= file
->private_data
;
555 /* check if index in the buffer */
557 if((cifsFile
== NULL
) || (ppCurrentEntry
== NULL
) ||
558 (num_to_ret
== NULL
))
561 *ppCurrentEntry
= NULL
;
562 first_entry_in_buffer
=
563 cifsFile
->srch_inf
.index_of_last_entry
-
564 cifsFile
->srch_inf
.entries_in_buffer
;
565 /* dump_cifs_file_struct(file, "In fce ");*/
566 if(((index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) &&
567 is_dir_changed(file
)) ||
568 (index_to_find
< first_entry_in_buffer
)) {
569 /* close and restart search */
570 cFYI(1,("search backing up - close and restart search"));
571 cifsFile
->invalidHandle
= TRUE
;
572 CIFSFindClose(xid
, pTcon
, cifsFile
->netfid
);
573 kfree(cifsFile
->search_resume_name
);
574 cifsFile
->search_resume_name
= NULL
;
575 if(cifsFile
->srch_inf
.ntwrk_buf_start
) {
576 cFYI(1,("freeing SMB ff cache buf on search rewind"));
577 cifs_buf_release(cifsFile
->srch_inf
.ntwrk_buf_start
);
579 rc
= initiate_cifs_search(xid
,file
);
581 cFYI(1,("error %d reinitiating a search on rewind",rc
));
586 while((index_to_find
>= cifsFile
->srch_inf
.index_of_last_entry
) &&
587 (rc
== 0) && (cifsFile
->srch_inf
.endOfSearch
== FALSE
)){
588 cFYI(1,("calling findnext2"));
589 rc
= CIFSFindNext(xid
,pTcon
,cifsFile
->netfid
,
590 &cifsFile
->srch_inf
);
594 if(index_to_find
< cifsFile
->srch_inf
.index_of_last_entry
) {
595 /* we found the buffer that contains the entry */
596 /* scan and find it */
598 char * current_entry
;
599 char * end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
600 smbCalcSize((struct smb_hdr
*)
601 cifsFile
->srch_inf
.ntwrk_buf_start
);
602 first_entry_in_buffer
= cifsFile
->srch_inf
.index_of_last_entry
603 - cifsFile
->srch_inf
.entries_in_buffer
;
604 pos_in_buf
= index_to_find
- first_entry_in_buffer
;
605 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf
));
606 current_entry
= cifsFile
->srch_inf
.srch_entries_start
;
607 for(i
=0;(i
<(pos_in_buf
)) && (current_entry
!= NULL
);i
++) {
608 /* go entry by entry figuring out which is first */
611 rc
= cifs_entry_is_dot(current_entry
,cifsFile
);
612 if(rc
== 1) /* is . or .. so skip */ {
613 cFYI(1,("Entry is .")); /* BB removeme BB */
615 } else if (rc
== 2 ) {
616 cFYI(1,("Entry is ..")); /* BB removeme BB */
619 current_entry
= nxt_dir_entry(current_entry
,end_of_smb
);
621 if((current_entry
== NULL
) && (i
< pos_in_buf
)) {
622 /* BB fixme - check if we should flag this error */
623 cERROR(1,("reached end of buf searching for pos in buf"
624 " %d index to find %lld rc %d",
625 pos_in_buf
,index_to_find
,rc
));
628 *ppCurrentEntry
= current_entry
;
630 cFYI(1,("index not in buffer - could not findnext into it"));
634 if(pos_in_buf
>= cifsFile
->srch_inf
.entries_in_buffer
) {
635 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
638 *num_to_ret
= cifsFile
->srch_inf
.entries_in_buffer
- pos_in_buf
;
643 /* inode num, inode type and filename returned */
644 static int cifs_get_name_from_search_buf(struct qstr
*pqst
,
645 char *current_entry
, __u16 level
, unsigned int unicode
,
646 struct cifs_sb_info
* cifs_sb
, ino_t
*pinum
)
649 unsigned int len
= 0;
651 struct nls_table
* nlt
= cifs_sb
->local_nls
;
655 if(level
== SMB_FIND_FILE_UNIX
) {
656 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
658 filename
= &pFindData
->FileName
[0];
660 len
= cifs_unicode_bytelen(filename
);
662 /* BB should we make this strnlen of PATH_MAX? */
663 len
= strnlen(filename
, PATH_MAX
);
666 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
667 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_SERVER_INUM
)
668 *pinum
= pFindData
->UniqueId
;
669 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
670 FILE_DIRECTORY_INFO
* pFindData
=
671 (FILE_DIRECTORY_INFO
*)current_entry
;
672 filename
= &pFindData
->FileName
[0];
673 len
= le32_to_cpu(pFindData
->FileNameLength
);
674 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
675 FILE_FULL_DIRECTORY_INFO
* pFindData
=
676 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
677 filename
= &pFindData
->FileName
[0];
678 len
= le32_to_cpu(pFindData
->FileNameLength
);
679 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
680 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
681 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
682 filename
= &pFindData
->FileName
[0];
683 len
= le32_to_cpu(pFindData
->FileNameLength
);
684 *pinum
= pFindData
->UniqueId
;
685 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
686 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
687 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
688 filename
= &pFindData
->FileName
[0];
689 len
= le32_to_cpu(pFindData
->FileNameLength
);
691 cFYI(1,("Unknown findfirst level %d",level
));
695 /* BB fixme - test with long names */
696 /* Note converted filename can be longer than in unicode */
697 if(cifs_sb
->mnt_cifs_flags
& CIFS_MOUNT_MAP_SPECIAL_CHR
)
698 pqst
->len
= cifs_convertUCSpath((char *)pqst
->name
,
699 (__le16
*)filename
, len
/2, nlt
);
701 pqst
->len
= cifs_strfromUCS_le((char *)pqst
->name
,
702 (wchar_t *)filename
,len
/2,nlt
);
704 pqst
->name
= filename
;
707 pqst
->hash
= full_name_hash(pqst
->name
,pqst
->len
);
708 /* cFYI(1,("filldir on %s",pqst->name)); */
712 static int cifs_filldir(char *pfindEntry
, struct file
*file
,
713 filldir_t filldir
, void *direntry
, char *scratch_buf
)
717 struct cifsFileInfo
* pCifsF
;
720 struct cifs_sb_info
* cifs_sb
;
721 struct inode
*tmp_inode
;
722 struct dentry
*tmp_dentry
;
724 /* get filename and len into qstring */
726 /* decide whether to create and populate ionde */
727 if((direntry
== NULL
) || (file
== NULL
))
730 pCifsF
= file
->private_data
;
732 if((scratch_buf
== NULL
) || (pfindEntry
== NULL
) || (pCifsF
== NULL
))
735 if(file
->f_dentry
== NULL
)
738 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
740 qstring
.name
= scratch_buf
;
741 rc
= cifs_get_name_from_search_buf(&qstring
,pfindEntry
,
742 pCifsF
->srch_inf
.info_level
,
743 pCifsF
->srch_inf
.unicode
,cifs_sb
,
744 &inum
/* returned */);
749 rc
= construct_dentry(&qstring
,file
,&tmp_inode
, &tmp_dentry
);
750 if((tmp_inode
== NULL
) || (tmp_dentry
== NULL
))
754 /* inode created, we need to hash it with right inode number */
756 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
757 tmp_inode
->i_ino
= inum
;
759 insert_inode_hash(tmp_inode
);
762 /* we pass in rc below, indicating whether it is a new inode,
763 so we can figure out whether to invalidate the inode cached
764 data if the file has changed */
765 if(pCifsF
->srch_inf
.info_level
== SMB_FIND_FILE_UNIX
) {
766 unix_fill_in_inode(tmp_inode
,
767 (FILE_UNIX_INFO
*)pfindEntry
,&obj_type
, rc
);
769 fill_in_inode(tmp_inode
,
770 (FILE_DIRECTORY_INFO
*)pfindEntry
,&obj_type
, rc
);
773 rc
= filldir(direntry
,qstring
.name
,qstring
.len
,file
->f_pos
,
774 tmp_inode
->i_ino
,obj_type
);
776 cFYI(1,("filldir rc = %d",rc
));
783 static int cifs_save_resume_key(const char *current_entry
,
784 struct cifsFileInfo
*cifsFile
)
787 unsigned int len
= 0;
791 if((cifsFile
== NULL
) || (current_entry
== NULL
))
794 level
= cifsFile
->srch_inf
.info_level
;
796 if(level
== SMB_FIND_FILE_UNIX
) {
797 FILE_UNIX_INFO
* pFindData
= (FILE_UNIX_INFO
*)current_entry
;
799 filename
= &pFindData
->FileName
[0];
800 if(cifsFile
->srch_inf
.unicode
) {
801 len
= cifs_unicode_bytelen(filename
);
803 /* BB should we make this strnlen of PATH_MAX? */
804 len
= strnlen(filename
, PATH_MAX
);
806 cifsFile
->srch_inf
.resume_key
= pFindData
->ResumeKey
;
807 } else if(level
== SMB_FIND_FILE_DIRECTORY_INFO
) {
808 FILE_DIRECTORY_INFO
* pFindData
=
809 (FILE_DIRECTORY_INFO
*)current_entry
;
810 filename
= &pFindData
->FileName
[0];
811 len
= le32_to_cpu(pFindData
->FileNameLength
);
812 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
813 } else if(level
== SMB_FIND_FILE_FULL_DIRECTORY_INFO
) {
814 FILE_FULL_DIRECTORY_INFO
* pFindData
=
815 (FILE_FULL_DIRECTORY_INFO
*)current_entry
;
816 filename
= &pFindData
->FileName
[0];
817 len
= le32_to_cpu(pFindData
->FileNameLength
);
818 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
819 } else if(level
== SMB_FIND_FILE_ID_FULL_DIR_INFO
) {
820 SEARCH_ID_FULL_DIR_INFO
* pFindData
=
821 (SEARCH_ID_FULL_DIR_INFO
*)current_entry
;
822 filename
= &pFindData
->FileName
[0];
823 len
= le32_to_cpu(pFindData
->FileNameLength
);
824 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
825 } else if(level
== SMB_FIND_FILE_BOTH_DIRECTORY_INFO
) {
826 FILE_BOTH_DIRECTORY_INFO
* pFindData
=
827 (FILE_BOTH_DIRECTORY_INFO
*)current_entry
;
828 filename
= &pFindData
->FileName
[0];
829 len
= le32_to_cpu(pFindData
->FileNameLength
);
830 cifsFile
->srch_inf
.resume_key
= pFindData
->FileIndex
;
832 cFYI(1,("Unknown findfirst level %d",level
));
835 cifsFile
->srch_inf
.resume_name_len
= len
;
836 cifsFile
->srch_inf
.presume_name
= filename
;
840 int cifs_readdir(struct file
*file
, void *direntry
, filldir_t filldir
)
844 struct cifs_sb_info
*cifs_sb
;
845 struct cifsTconInfo
*pTcon
;
846 struct cifsFileInfo
*cifsFile
= NULL
;
847 char * current_entry
;
849 char * tmp_buf
= NULL
;
854 if(file
->f_dentry
== NULL
) {
859 cifs_sb
= CIFS_SB(file
->f_dentry
->d_sb
);
860 pTcon
= cifs_sb
->tcon
;
864 switch ((int) file
->f_pos
) {
866 /*if (filldir(direntry, ".", 1, file->f_pos,
867 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
868 cERROR(1, ("Filldir for current dir failed "));
874 /* if (filldir(direntry, "..", 2, file->f_pos,
875 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
876 cERROR(1, ("Filldir for parent dir failed "));
882 /* 1) If search is active,
883 is in current search buffer?
884 if it before then restart search
885 if after then keep searching till find it */
887 if(file
->private_data
== NULL
) {
888 rc
= initiate_cifs_search(xid
,file
);
889 cFYI(1,("initiate cifs search rc %d",rc
));
896 if(file
->private_data
== NULL
) {
901 cifsFile
= file
->private_data
;
902 if (cifsFile
->srch_inf
.endOfSearch
) {
903 if(cifsFile
->srch_inf
.emptyDir
) {
904 cFYI(1, ("End of search, empty dir"));
909 cifsFile->invalidHandle = TRUE;
910 CIFSFindClose(xid, pTcon, cifsFile->netfid);
912 kfree(cifsFile->search_resume_name);
913 cifsFile->search_resume_name = NULL; */
915 /* BB account for . and .. in f_pos as special case */
917 rc
= find_cifs_entry(xid
,pTcon
, file
,
918 ¤t_entry
,&num_to_fill
);
920 cFYI(1,("fce error %d",rc
));
922 } else if (current_entry
!= NULL
) {
923 cFYI(1,("entry %lld found",file
->f_pos
));
925 cFYI(1,("could not find entry"));
928 cFYI(1,("loop through %d times filling dir for net buf %p",
929 num_to_fill
,cifsFile
->srch_inf
.ntwrk_buf_start
));
930 end_of_smb
= cifsFile
->srch_inf
.ntwrk_buf_start
+
931 smbCalcSize((struct smb_hdr
*)
932 cifsFile
->srch_inf
.ntwrk_buf_start
);
933 /* To be safe - for UCS to UTF-8 with strings loaded
934 with the rare long characters alloc more to account for
935 such multibyte target UTF-8 characters. cifs_unicode.c,
936 which actually does the conversion, has the same limit */
937 tmp_buf
= kmalloc((2 * NAME_MAX
) + 4, GFP_KERNEL
);
938 for(i
=0;(i
<num_to_fill
) && (rc
== 0);i
++) {
939 if(current_entry
== NULL
) {
940 /* evaluate whether this case is an error */
941 cERROR(1,("past end of SMB num to fill %d i %d",
946 rc
= cifs_filldir(current_entry
, file
,
947 filldir
, direntry
,tmp_buf
);
949 if(file
->f_pos
== cifsFile
->srch_inf
.index_of_last_entry
) {
950 cFYI(1,("last entry in buf at pos %lld %s",
951 file
->f_pos
,tmp_buf
)); /* BB removeme BB */
952 cifs_save_resume_key(current_entry
,cifsFile
);
955 current_entry
= nxt_dir_entry(current_entry
,