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 #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"));
48 if(cf->srch_inf.endOfSearch) {
49 cFYI(1,("end of search"));
51 if(cf->srch_inf.emptyDir) {
52 cFYI(1,("empty dir"));
59 /* Returns one if new inode created (which therefore needs to be hashed) */
60 /* Might check in the future if inode number changed so we can rehash inode */
61 static int construct_dentry(struct qstr *qstring, struct file *file,
62 struct inode **ptmp_inode, struct dentry **pnew_dentry)
64 struct dentry *tmp_dentry;
65 struct cifs_sb_info *cifs_sb;
66 struct cifsTconInfo *pTcon;
69 cFYI(1, ("For %s", qstring->name));
70 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
71 pTcon = cifs_sb->tcon;
73 qstring->hash = full_name_hash(qstring->name, qstring->len);
74 tmp_dentry = d_lookup(file->f_dentry, qstring);
76 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode));
77 *ptmp_inode = tmp_dentry->d_inode;
78 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
79 if(*ptmp_inode == NULL) {
80 *ptmp_inode = new_inode(file->f_dentry->d_sb);
81 if(*ptmp_inode == NULL)
84 d_instantiate(tmp_dentry, *ptmp_inode);
87 tmp_dentry = d_alloc(file->f_dentry, qstring);
88 if(tmp_dentry == NULL) {
89 cERROR(1,("Failed allocating dentry"));
94 *ptmp_inode = new_inode(file->f_dentry->d_sb);
96 tmp_dentry->d_op = &cifs_ci_dentry_ops;
98 tmp_dentry->d_op = &cifs_dentry_ops;
99 if(*ptmp_inode == NULL)
102 d_instantiate(tmp_dentry, *ptmp_inode);
103 d_rehash(tmp_dentry);
106 tmp_dentry->d_time = jiffies;
107 *pnew_dentry = tmp_dentry;
111 static void fill_in_inode(struct inode *tmp_inode,
112 FILE_DIRECTORY_INFO *pfindData, int *pobject_type, int isNewInode)
115 struct timespec local_mtime;
117 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
118 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
119 __u32 attr = le32_to_cpu(pfindData->ExtFileAttributes);
120 __u64 allocation_size = le64_to_cpu(pfindData->AllocationSize);
121 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
123 cifsInfo->cifsAttrs = attr;
124 cifsInfo->time = jiffies;
126 /* save mtime and size */
127 local_mtime = tmp_inode->i_mtime;
128 local_size = tmp_inode->i_size;
130 /* Linux can not store file creation time unfortunately so ignore it */
132 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
134 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
136 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
137 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
138 /* 2767 perms - indicate mandatory locking */
139 /* BB fill in uid and gid here? with help from winbind?
140 or retrieve from NTFS stream extended attribute */
141 if (atomic_read(&cifsInfo->inUse) == 0) {
142 tmp_inode->i_uid = cifs_sb->mnt_uid;
143 tmp_inode->i_gid = cifs_sb->mnt_gid;
144 /* set default mode. will override for dirs below */
145 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
147 /* mask off the type bits since it gets set
148 below and we do not want to get two type
150 tmp_inode->i_mode &= ~S_IFMT;
153 if (attr & ATTR_DIRECTORY) {
154 *pobject_type = DT_DIR;
155 /* override default perms since we do not lock dirs */
156 if(atomic_read(&cifsInfo->inUse) == 0) {
157 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
159 tmp_inode->i_mode |= S_IFDIR;
160 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
161 (attr & ATTR_SYSTEM)) {
162 if (end_of_file == 0) {
163 *pobject_type = DT_FIFO;
164 tmp_inode->i_mode |= S_IFIFO;
166 /* rather than get the type here, we mark the
167 inode as needing revalidate and get the real type
168 (blk vs chr vs. symlink) later ie in lookup */
169 *pobject_type = DT_REG;
170 tmp_inode->i_mode |= S_IFREG;
173 /* we no longer mark these because we could not follow them */
174 /* } else if (attr & ATTR_REPARSE) {
175 *pobject_type = DT_LNK;
176 tmp_inode->i_mode |= S_IFLNK; */
178 *pobject_type = DT_REG;
179 tmp_inode->i_mode |= S_IFREG;
180 if (attr & ATTR_READONLY)
181 tmp_inode->i_mode &= ~(S_IWUGO);
182 } /* could add code here - to validate if device or weird share type? */
184 /* can not fill in nlink here as in qpathinfo version and Unx search */
185 if (atomic_read(&cifsInfo->inUse) == 0) {
186 atomic_set(&cifsInfo->inUse, 1);
189 if (is_size_safe_to_change(cifsInfo)) {
190 /* can not safely change the file size here if the
191 client is writing to it due to potential races */
192 i_size_write(tmp_inode, end_of_file);
194 /* 512 bytes (2**9) is the fake blocksize that must be used */
195 /* for this calculation, even though the reported blocksize is larger */
196 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
199 if (allocation_size < end_of_file)
200 cFYI(1, ("May be sparse file, allocation less than file size"));
201 cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld",
202 (unsigned long)tmp_inode->i_size,
203 (unsigned long long)tmp_inode->i_blocks,
204 tmp_inode->i_blksize));
205 if (S_ISREG(tmp_inode->i_mode)) {
206 cFYI(1, ("File inode"));
207 tmp_inode->i_op = &cifs_file_inode_ops;
208 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
209 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
210 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
212 tmp_inode->i_fop = &cifs_file_direct_ops;
214 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
215 tmp_inode->i_fop = &cifs_file_nobrl_ops;
217 tmp_inode->i_fop = &cifs_file_ops;
219 tmp_inode->i_data.a_ops = &cifs_addr_ops;
220 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
221 (cifs_sb->tcon->ses->server->maxBuf <
222 4096 + MAX_CIFS_HDR_SIZE))
223 tmp_inode->i_data.a_ops->readpages = NULL;
225 return; /* No sense invalidating pages for new inode
226 since have not started caching readahead file
229 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
230 (local_size == tmp_inode->i_size)) {
231 cFYI(1, ("inode exists but unchanged"));
233 /* file may have changed on server */
234 cFYI(1, ("invalidate inode, readdir detected change"));
235 invalidate_remote_inode(tmp_inode);
237 } else if (S_ISDIR(tmp_inode->i_mode)) {
238 cFYI(1, ("Directory inode"));
239 tmp_inode->i_op = &cifs_dir_inode_ops;
240 tmp_inode->i_fop = &cifs_dir_ops;
241 } else if (S_ISLNK(tmp_inode->i_mode)) {
242 cFYI(1, ("Symbolic Link inode"));
243 tmp_inode->i_op = &cifs_symlink_inode_ops;
245 cFYI(1, ("Init special inode"));
246 init_special_inode(tmp_inode, tmp_inode->i_mode,
251 static void unix_fill_in_inode(struct inode *tmp_inode,
252 FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
255 struct timespec local_mtime;
257 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
258 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
260 __u32 type = le32_to_cpu(pfindData->Type);
261 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
262 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
263 cifsInfo->time = jiffies;
264 atomic_inc(&cifsInfo->inUse);
266 /* save mtime and size */
267 local_mtime = tmp_inode->i_mtime;
268 local_size = tmp_inode->i_size;
271 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
273 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
275 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
277 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
278 /* since we set the inode type below we need to mask off type
279 to avoid strange results if bits above were corrupt */
280 tmp_inode->i_mode &= ~S_IFMT;
281 if (type == UNIX_FILE) {
282 *pobject_type = DT_REG;
283 tmp_inode->i_mode |= S_IFREG;
284 } else if (type == UNIX_SYMLINK) {
285 *pobject_type = DT_LNK;
286 tmp_inode->i_mode |= S_IFLNK;
287 } else if (type == UNIX_DIR) {
288 *pobject_type = DT_DIR;
289 tmp_inode->i_mode |= S_IFDIR;
290 } else if (type == UNIX_CHARDEV) {
291 *pobject_type = DT_CHR;
292 tmp_inode->i_mode |= S_IFCHR;
293 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
294 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
295 } else if (type == UNIX_BLOCKDEV) {
296 *pobject_type = DT_BLK;
297 tmp_inode->i_mode |= S_IFBLK;
298 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
299 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
300 } else if (type == UNIX_FIFO) {
301 *pobject_type = DT_FIFO;
302 tmp_inode->i_mode |= S_IFIFO;
303 } else if (type == UNIX_SOCKET) {
304 *pobject_type = DT_SOCK;
305 tmp_inode->i_mode |= S_IFSOCK;
307 /* safest to just call it a file */
308 *pobject_type = DT_REG;
309 tmp_inode->i_mode |= S_IFREG;
310 cFYI(1,("unknown inode type %d",type));
313 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
314 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
315 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
317 if (is_size_safe_to_change(cifsInfo)) {
318 /* can not safely change the file size here if the
319 client is writing to it due to potential races */
320 i_size_write(tmp_inode,end_of_file);
322 /* 512 bytes (2**9) is the fake blocksize that must be used */
323 /* for this calculation, not the real blocksize */
324 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
327 if (S_ISREG(tmp_inode->i_mode)) {
328 cFYI(1, ("File inode"));
329 tmp_inode->i_op = &cifs_file_inode_ops;
331 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
332 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
333 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
335 tmp_inode->i_fop = &cifs_file_direct_ops;
337 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
338 tmp_inode->i_fop = &cifs_file_nobrl_ops;
340 tmp_inode->i_fop = &cifs_file_ops;
342 tmp_inode->i_data.a_ops = &cifs_addr_ops;
343 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
344 (cifs_sb->tcon->ses->server->maxBuf <
345 4096 + MAX_CIFS_HDR_SIZE))
346 tmp_inode->i_data.a_ops->readpages = NULL;
349 return; /* No sense invalidating pages for new inode since we
350 have not started caching readahead file data yet */
352 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
353 (local_size == tmp_inode->i_size)) {
354 cFYI(1, ("inode exists but unchanged"));
356 /* file may have changed on server */
357 cFYI(1, ("invalidate inode, readdir detected change"));
358 invalidate_remote_inode(tmp_inode);
360 } else if (S_ISDIR(tmp_inode->i_mode)) {
361 cFYI(1, ("Directory inode"));
362 tmp_inode->i_op = &cifs_dir_inode_ops;
363 tmp_inode->i_fop = &cifs_dir_ops;
364 } else if (S_ISLNK(tmp_inode->i_mode)) {
365 cFYI(1, ("Symbolic Link inode"));
366 tmp_inode->i_op = &cifs_symlink_inode_ops;
367 /* tmp_inode->i_fop = *//* do not need to set to anything */
369 cFYI(1, ("Special inode"));
370 init_special_inode(tmp_inode, tmp_inode->i_mode,
375 static int initiate_cifs_search(const int xid, struct file *file)
379 struct cifsFileInfo * cifsFile;
380 struct cifs_sb_info *cifs_sb;
381 struct cifsTconInfo *pTcon;
383 if(file->private_data == NULL) {
385 kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
388 if(file->private_data == NULL) {
391 memset(file->private_data,0,sizeof(struct cifsFileInfo));
393 cifsFile = file->private_data;
394 cifsFile->invalidHandle = TRUE;
395 cifsFile->srch_inf.endOfSearch = FALSE;
397 if(file->f_dentry == NULL)
400 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
404 pTcon = cifs_sb->tcon;
408 full_path = build_path_from_dentry(file->f_dentry);
410 if(full_path == NULL) {
414 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
417 /* test for Unix extensions */
418 if (pTcon->ses->capabilities & CAP_UNIX) {
419 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
420 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
421 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
422 } else /* not srvinos - BB fixme add check for backlevel? */ {
423 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
426 rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
427 &cifsFile->netfid, &cifsFile->srch_inf,
428 cifs_sb->mnt_cifs_flags &
429 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
431 cifsFile->invalidHandle = FALSE;
432 if((rc == -EOPNOTSUPP) &&
433 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
434 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
441 /* return length of unicode string in bytes */
442 static int cifs_unicode_bytelen(char *str)
445 __le16 * ustr = (__le16 *)str;
447 for(len=0;len <= PATH_MAX;len++) {
451 cFYI(1,("Unicode string longer than PATH_MAX found"));
455 static char *nxt_dir_entry(char *old_entry, char *end_of_smb)
458 FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
460 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
461 cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
462 /* validate that new_entry is not past end of SMB */
463 if(new_entry >= end_of_smb) {
465 ("search entry %p began after end of SMB %p old entry %p",
466 new_entry, end_of_smb, old_entry));
468 } else if (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb) {
469 cERROR(1,("search entry %p extends after end of SMB %p",
470 new_entry, end_of_smb));
477 #define UNICODE_DOT cpu_to_le16(0x2e)
479 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
480 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
483 char * filename = NULL;
486 if(cfile->srch_inf.info_level == 0x202) {
487 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
488 filename = &pFindData->FileName[0];
489 if(cfile->srch_inf.unicode) {
490 len = cifs_unicode_bytelen(filename);
492 /* BB should we make this strnlen of PATH_MAX? */
493 len = strnlen(filename, 5);
495 } else if(cfile->srch_inf.info_level == 0x101) {
496 FILE_DIRECTORY_INFO * pFindData =
497 (FILE_DIRECTORY_INFO *)current_entry;
498 filename = &pFindData->FileName[0];
499 len = le32_to_cpu(pFindData->FileNameLength);
500 } else if(cfile->srch_inf.info_level == 0x102) {
501 FILE_FULL_DIRECTORY_INFO * pFindData =
502 (FILE_FULL_DIRECTORY_INFO *)current_entry;
503 filename = &pFindData->FileName[0];
504 len = le32_to_cpu(pFindData->FileNameLength);
505 } else if(cfile->srch_inf.info_level == 0x105) {
506 SEARCH_ID_FULL_DIR_INFO * pFindData =
507 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
508 filename = &pFindData->FileName[0];
509 len = le32_to_cpu(pFindData->FileNameLength);
510 } else if(cfile->srch_inf.info_level == 0x104) {
511 FILE_BOTH_DIRECTORY_INFO * pFindData =
512 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
513 filename = &pFindData->FileName[0];
514 len = le32_to_cpu(pFindData->FileNameLength);
516 cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
520 if(cfile->srch_inf.unicode) {
521 __le16 *ufilename = (__le16 *)filename;
524 if(ufilename[0] == UNICODE_DOT)
526 } else if(len == 4) {
528 if((ufilename[0] == UNICODE_DOT)
529 &&(ufilename[1] == UNICODE_DOT))
534 if(filename[0] == '.')
536 } else if(len == 2) {
537 if((filename[0] == '.') && (filename[1] == '.'))
546 /* Check if directory that we are searching has changed so we can decide
547 whether we can use the cached search results from the previous search */
548 static int is_dir_changed(struct file * file)
550 struct inode * inode;
551 struct cifsInodeInfo *cifsInfo;
553 if(file->f_dentry == NULL)
556 inode = file->f_dentry->d_inode;
561 cifsInfo = CIFS_I(inode);
563 if(cifsInfo->time == 0)
564 return 1; /* directory was changed, perhaps due to unlink */
570 /* find the corresponding entry in the search */
571 /* Note that the SMB server returns search entries for . and .. which
572 complicates logic here if we choose to parse for them and we do not
573 assume that they are located in the findfirst return buffer.*/
574 /* We start counting in the buffer with entry 2 and increment for every
575 entry (do not increment for . or .. entry) */
576 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
577 struct file *file, char **ppCurrentEntry, int *num_to_ret)
581 loff_t first_entry_in_buffer;
582 loff_t index_to_find = file->f_pos;
583 struct cifsFileInfo * cifsFile = file->private_data;
584 /* check if index in the buffer */
586 if((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
587 (num_to_ret == NULL))
590 *ppCurrentEntry = NULL;
591 first_entry_in_buffer =
592 cifsFile->srch_inf.index_of_last_entry -
593 cifsFile->srch_inf.entries_in_buffer;
595 /* if first entry in buf is zero then is first buffer
596 in search response data which means it is likely . and ..
597 will be in this buffer, although some servers do not return
598 . and .. for the root of a drive and for those we need
599 to start two entries earlier */
601 #ifdef CONFIG_CIFS_DEBUG2
602 dump_cifs_file_struct(file, "In fce ");
604 if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
605 is_dir_changed(file)) ||
606 (index_to_find < first_entry_in_buffer)) {
607 /* close and restart search */
608 cFYI(1,("search backing up - close and restart search"));
609 cifsFile->invalidHandle = TRUE;
610 CIFSFindClose(xid, pTcon, cifsFile->netfid);
611 kfree(cifsFile->search_resume_name);
612 cifsFile->search_resume_name = NULL;
613 if(cifsFile->srch_inf.ntwrk_buf_start) {
614 cFYI(1,("freeing SMB ff cache buf on search rewind"));
615 if(cifsFile->srch_inf.smallBuf)
616 cifs_small_buf_release(cifsFile->srch_inf.
619 cifs_buf_release(cifsFile->srch_inf.
622 rc = initiate_cifs_search(xid,file);
624 cFYI(1,("error %d reinitiating a search on rewind",rc));
629 while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
630 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
631 cFYI(1,("calling findnext2"));
632 rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
633 &cifsFile->srch_inf);
637 if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
638 /* we found the buffer that contains the entry */
639 /* scan and find it */
641 char * current_entry;
642 char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
643 smbCalcSize((struct smb_hdr *)
644 cifsFile->srch_inf.ntwrk_buf_start);
646 current_entry = cifsFile->srch_inf.srch_entries_start;
647 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
648 - cifsFile->srch_inf.entries_in_buffer;
649 pos_in_buf = index_to_find - first_entry_in_buffer;
650 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
651 for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
652 /* go entry by entry figuring out which is first */
653 current_entry = nxt_dir_entry(current_entry,end_of_smb);
655 if((current_entry == NULL) && (i < pos_in_buf)) {
656 /* BB fixme - check if we should flag this error */
657 cERROR(1,("reached end of buf searching for pos in buf"
658 " %d index to find %lld rc %d",
659 pos_in_buf,index_to_find,rc));
662 *ppCurrentEntry = current_entry;
664 cFYI(1,("index not in buffer - could not findnext into it"));
668 if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
669 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
672 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
677 /* inode num, inode type and filename returned */
678 static int cifs_get_name_from_search_buf(struct qstr *pqst,
679 char *current_entry, __u16 level, unsigned int unicode,
680 struct cifs_sb_info * cifs_sb, ino_t *pinum)
683 unsigned int len = 0;
685 struct nls_table * nlt = cifs_sb->local_nls;
689 if(level == SMB_FIND_FILE_UNIX) {
690 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
692 filename = &pFindData->FileName[0];
694 len = cifs_unicode_bytelen(filename);
696 /* BB should we make this strnlen of PATH_MAX? */
697 len = strnlen(filename, PATH_MAX);
700 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
701 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
702 *pinum = pFindData->UniqueId;
703 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
704 FILE_DIRECTORY_INFO * pFindData =
705 (FILE_DIRECTORY_INFO *)current_entry;
706 filename = &pFindData->FileName[0];
707 len = le32_to_cpu(pFindData->FileNameLength);
708 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
709 FILE_FULL_DIRECTORY_INFO * pFindData =
710 (FILE_FULL_DIRECTORY_INFO *)current_entry;
711 filename = &pFindData->FileName[0];
712 len = le32_to_cpu(pFindData->FileNameLength);
713 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
714 SEARCH_ID_FULL_DIR_INFO * pFindData =
715 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
716 filename = &pFindData->FileName[0];
717 len = le32_to_cpu(pFindData->FileNameLength);
718 *pinum = pFindData->UniqueId;
719 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
720 FILE_BOTH_DIRECTORY_INFO * pFindData =
721 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
722 filename = &pFindData->FileName[0];
723 len = le32_to_cpu(pFindData->FileNameLength);
725 cFYI(1,("Unknown findfirst level %d",level));
729 /* BB fixme - test with long names */
730 /* Note converted filename can be longer than in unicode */
731 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
732 pqst->len = cifs_convertUCSpath((char *)pqst->name,
733 (__le16 *)filename, len/2, nlt);
735 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
736 (__le16 *)filename,len/2,nlt);
738 pqst->name = filename;
741 pqst->hash = full_name_hash(pqst->name,pqst->len);
742 /* cFYI(1,("filldir on %s",pqst->name)); */
746 static int cifs_filldir(char *pfindEntry, struct file *file,
747 filldir_t filldir, void *direntry, char *scratch_buf)
751 struct cifsFileInfo * pCifsF;
754 struct cifs_sb_info * cifs_sb;
755 struct inode *tmp_inode;
756 struct dentry *tmp_dentry;
758 /* get filename and len into qstring */
760 /* decide whether to create and populate ionde */
761 if((direntry == NULL) || (file == NULL))
764 pCifsF = file->private_data;
766 if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
769 if(file->f_dentry == NULL)
772 rc = cifs_entry_is_dot(pfindEntry,pCifsF);
773 /* skip . and .. since we added them first */
777 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
779 qstring.name = scratch_buf;
780 rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
781 pCifsF->srch_inf.info_level,
782 pCifsF->srch_inf.unicode,cifs_sb,
783 &inum /* returned */);
788 rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
789 if((tmp_inode == NULL) || (tmp_dentry == NULL))
793 /* inode created, we need to hash it with right inode number */
795 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
796 tmp_inode->i_ino = inum;
798 insert_inode_hash(tmp_inode);
801 /* we pass in rc below, indicating whether it is a new inode,
802 so we can figure out whether to invalidate the inode cached
803 data if the file has changed */
804 if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
805 unix_fill_in_inode(tmp_inode,
806 (FILE_UNIX_INFO *)pfindEntry,&obj_type, rc);
808 fill_in_inode(tmp_inode,
809 (FILE_DIRECTORY_INFO *)pfindEntry,&obj_type, rc);
812 rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
813 tmp_inode->i_ino,obj_type);
815 cFYI(1,("filldir rc = %d",rc));
822 static int cifs_save_resume_key(const char *current_entry,
823 struct cifsFileInfo *cifsFile)
826 unsigned int len = 0;
830 if((cifsFile == NULL) || (current_entry == NULL))
833 level = cifsFile->srch_inf.info_level;
835 if(level == SMB_FIND_FILE_UNIX) {
836 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
838 filename = &pFindData->FileName[0];
839 if(cifsFile->srch_inf.unicode) {
840 len = cifs_unicode_bytelen(filename);
842 /* BB should we make this strnlen of PATH_MAX? */
843 len = strnlen(filename, PATH_MAX);
845 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
846 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
847 FILE_DIRECTORY_INFO * pFindData =
848 (FILE_DIRECTORY_INFO *)current_entry;
849 filename = &pFindData->FileName[0];
850 len = le32_to_cpu(pFindData->FileNameLength);
851 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
852 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
853 FILE_FULL_DIRECTORY_INFO * pFindData =
854 (FILE_FULL_DIRECTORY_INFO *)current_entry;
855 filename = &pFindData->FileName[0];
856 len = le32_to_cpu(pFindData->FileNameLength);
857 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
858 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
859 SEARCH_ID_FULL_DIR_INFO * pFindData =
860 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
861 filename = &pFindData->FileName[0];
862 len = le32_to_cpu(pFindData->FileNameLength);
863 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
864 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
865 FILE_BOTH_DIRECTORY_INFO * pFindData =
866 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
867 filename = &pFindData->FileName[0];
868 len = le32_to_cpu(pFindData->FileNameLength);
869 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
871 cFYI(1,("Unknown findfirst level %d",level));
874 cifsFile->srch_inf.resume_name_len = len;
875 cifsFile->srch_inf.presume_name = filename;
879 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
883 struct cifs_sb_info *cifs_sb;
884 struct cifsTconInfo *pTcon;
885 struct cifsFileInfo *cifsFile = NULL;
886 char * current_entry;
888 char * tmp_buf = NULL;
893 if(file->f_dentry == NULL) {
898 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
899 pTcon = cifs_sb->tcon;
903 switch ((int) file->f_pos) {
905 if (filldir(direntry, ".", 1, file->f_pos,
906 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
907 cERROR(1, ("Filldir for current dir failed"));
913 if (filldir(direntry, "..", 2, file->f_pos,
914 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
915 cERROR(1, ("Filldir for parent dir failed"));
921 /* 1) If search is active,
922 is in current search buffer?
923 if it before then restart search
924 if after then keep searching till find it */
926 if(file->private_data == NULL) {
927 rc = initiate_cifs_search(xid,file);
928 cFYI(1,("initiate cifs search rc %d",rc));
934 if(file->private_data == NULL) {
939 cifsFile = file->private_data;
940 if (cifsFile->srch_inf.endOfSearch) {
941 if(cifsFile->srch_inf.emptyDir) {
942 cFYI(1, ("End of search, empty dir"));
947 cifsFile->invalidHandle = TRUE;
948 CIFSFindClose(xid, pTcon, cifsFile->netfid);
950 kfree(cifsFile->search_resume_name);
951 cifsFile->search_resume_name = NULL; */
953 rc = find_cifs_entry(xid,pTcon, file,
954 ¤t_entry,&num_to_fill);
956 cFYI(1,("fce error %d",rc));
958 } else if (current_entry != NULL) {
959 cFYI(1,("entry %lld found",file->f_pos));
961 cFYI(1,("could not find entry"));
964 cFYI(1,("loop through %d times filling dir for net buf %p",
965 num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
966 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
967 smbCalcSize((struct smb_hdr *)
968 cifsFile->srch_inf.ntwrk_buf_start);
969 /* To be safe - for UCS to UTF-8 with strings loaded
970 with the rare long characters alloc more to account for
971 such multibyte target UTF-8 characters. cifs_unicode.c,
972 which actually does the conversion, has the same limit */
973 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
974 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
975 if(current_entry == NULL) {
976 /* evaluate whether this case is an error */
977 cERROR(1,("past end of SMB num to fill %d i %d",
981 /* if buggy server returns . and .. late do
982 we want to check for that here? */
983 rc = cifs_filldir(current_entry, file,
984 filldir, direntry,tmp_buf);
987 cifsFile->srch_inf.index_of_last_entry) {
988 cFYI(1,("last entry in buf at pos %lld %s",
989 file->f_pos,tmp_buf));
990 cifs_save_resume_key(current_entry,cifsFile);
993 current_entry = nxt_dir_entry(current_entry,