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/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_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_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_dentry->d_sb);
82 if(*ptmp_inode == NULL)
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)
104 tmp_dentry->d_time = jiffies;
105 *pnew_dentry = tmp_dentry;
109 static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode)
111 if((tcon) && (tcon->ses) && (tcon->ses->server)) {
112 inode->i_ctime.tv_sec += tcon->ses->server.timeAdj;
113 inode->i_mtime.tv_sec += tcon->ses->server.timeAdj;
114 inode->i_atime.tv_sec += tcon->ses->server.timeAdj;
120 static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
121 char * buf, int *pobject_type, int isNewInode)
124 struct timespec local_mtime;
126 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
127 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
129 __u64 allocation_size;
132 /* save mtime and size */
133 local_mtime = tmp_inode->i_mtime;
134 local_size = tmp_inode->i_size;
137 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
139 attr = le32_to_cpu(pfindData->ExtFileAttributes);
140 allocation_size = le64_to_cpu(pfindData->AllocationSize);
141 end_of_file = le64_to_cpu(pfindData->EndOfFile);
143 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
145 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
147 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
148 } else { /* legacy, OS2 and DOS style */
149 /* struct timespec ts;*/
150 FIND_FILE_STANDARD_INFO * pfindData =
151 (FIND_FILE_STANDARD_INFO *)buf;
153 tmp_inode->i_mtime = cnvrtDosUnixTm(
154 le16_to_cpu(pfindData->LastWriteDate),
155 le16_to_cpu(pfindData->LastWriteTime));
156 tmp_inode->i_atime = cnvrtDosUnixTm(
157 le16_to_cpu(pfindData->LastAccessDate),
158 le16_to_cpu(pfindData->LastAccessTime));
159 tmp_inode->i_ctime = cnvrtDosUnixTm(
160 le16_to_cpu(pfindData->LastWriteDate),
161 le16_to_cpu(pfindData->LastWriteTime));
162 AdjustForTZ(cifs_sb->tcon, tmp_inode);
163 attr = le16_to_cpu(pfindData->Attributes);
164 allocation_size = le32_to_cpu(pfindData->AllocationSize);
165 end_of_file = le32_to_cpu(pfindData->DataSize);
168 /* Linux can not store file creation time unfortunately so ignore it */
170 cifsInfo->cifsAttrs = attr;
171 cifsInfo->time = jiffies;
173 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
174 /* 2767 perms - indicate mandatory locking */
175 /* BB fill in uid and gid here? with help from winbind?
176 or retrieve from NTFS stream extended attribute */
177 if (atomic_read(&cifsInfo->inUse) == 0) {
178 tmp_inode->i_uid = cifs_sb->mnt_uid;
179 tmp_inode->i_gid = cifs_sb->mnt_gid;
180 /* set default mode. will override for dirs below */
181 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
183 /* mask off the type bits since it gets set
184 below and we do not want to get two type
186 tmp_inode->i_mode &= ~S_IFMT;
189 if (attr & ATTR_DIRECTORY) {
190 *pobject_type = DT_DIR;
191 /* override default perms since we do not lock dirs */
192 if(atomic_read(&cifsInfo->inUse) == 0) {
193 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
195 tmp_inode->i_mode |= S_IFDIR;
196 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
197 (attr & ATTR_SYSTEM)) {
198 if (end_of_file == 0) {
199 *pobject_type = DT_FIFO;
200 tmp_inode->i_mode |= S_IFIFO;
202 /* rather than get the type here, we mark the
203 inode as needing revalidate and get the real type
204 (blk vs chr vs. symlink) later ie in lookup */
205 *pobject_type = DT_REG;
206 tmp_inode->i_mode |= S_IFREG;
209 /* we no longer mark these because we could not follow them */
210 /* } else if (attr & ATTR_REPARSE) {
211 *pobject_type = DT_LNK;
212 tmp_inode->i_mode |= S_IFLNK; */
214 *pobject_type = DT_REG;
215 tmp_inode->i_mode |= S_IFREG;
216 if (attr & ATTR_READONLY)
217 tmp_inode->i_mode &= ~(S_IWUGO);
218 } /* could add code here - to validate if device or weird share type? */
220 /* can not fill in nlink here as in qpathinfo version and Unx search */
221 if (atomic_read(&cifsInfo->inUse) == 0) {
222 atomic_set(&cifsInfo->inUse, 1);
225 if (is_size_safe_to_change(cifsInfo)) {
226 /* can not safely change the file size here if the
227 client is writing to it due to potential races */
228 i_size_write(tmp_inode, end_of_file);
230 /* 512 bytes (2**9) is the fake blocksize that must be used */
231 /* for this calculation, even though the reported blocksize is larger */
232 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
235 if (allocation_size < end_of_file)
236 cFYI(1, ("May be sparse file, allocation less than file size"));
237 cFYI(1, ("File Size %ld and blocks %llu and blocksize %ld",
238 (unsigned long)tmp_inode->i_size,
239 (unsigned long long)tmp_inode->i_blocks,
240 tmp_inode->i_blksize));
241 if (S_ISREG(tmp_inode->i_mode)) {
242 cFYI(1, ("File inode"));
243 tmp_inode->i_op = &cifs_file_inode_ops;
244 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
245 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
246 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
248 tmp_inode->i_fop = &cifs_file_direct_ops;
250 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
251 tmp_inode->i_fop = &cifs_file_nobrl_ops;
253 tmp_inode->i_fop = &cifs_file_ops;
255 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
256 (cifs_sb->tcon->ses->server->maxBuf <
257 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
258 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
260 tmp_inode->i_data.a_ops = &cifs_addr_ops;
263 return; /* No sense invalidating pages for new inode
264 since have not started caching readahead file
267 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
268 (local_size == tmp_inode->i_size)) {
269 cFYI(1, ("inode exists but unchanged"));
271 /* file may have changed on server */
272 cFYI(1, ("invalidate inode, readdir detected change"));
273 invalidate_remote_inode(tmp_inode);
275 } else if (S_ISDIR(tmp_inode->i_mode)) {
276 cFYI(1, ("Directory inode"));
277 tmp_inode->i_op = &cifs_dir_inode_ops;
278 tmp_inode->i_fop = &cifs_dir_ops;
279 } else if (S_ISLNK(tmp_inode->i_mode)) {
280 cFYI(1, ("Symbolic Link inode"));
281 tmp_inode->i_op = &cifs_symlink_inode_ops;
283 cFYI(1, ("Init special inode"));
284 init_special_inode(tmp_inode, tmp_inode->i_mode,
289 static void unix_fill_in_inode(struct inode *tmp_inode,
290 FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
293 struct timespec local_mtime;
295 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
296 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
298 __u32 type = le32_to_cpu(pfindData->Type);
299 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
300 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
301 cifsInfo->time = jiffies;
302 atomic_inc(&cifsInfo->inUse);
304 /* save mtime and size */
305 local_mtime = tmp_inode->i_mtime;
306 local_size = tmp_inode->i_size;
309 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
311 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
313 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
315 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
316 /* since we set the inode type below we need to mask off type
317 to avoid strange results if bits above were corrupt */
318 tmp_inode->i_mode &= ~S_IFMT;
319 if (type == UNIX_FILE) {
320 *pobject_type = DT_REG;
321 tmp_inode->i_mode |= S_IFREG;
322 } else if (type == UNIX_SYMLINK) {
323 *pobject_type = DT_LNK;
324 tmp_inode->i_mode |= S_IFLNK;
325 } else if (type == UNIX_DIR) {
326 *pobject_type = DT_DIR;
327 tmp_inode->i_mode |= S_IFDIR;
328 } else if (type == UNIX_CHARDEV) {
329 *pobject_type = DT_CHR;
330 tmp_inode->i_mode |= S_IFCHR;
331 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
332 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
333 } else if (type == UNIX_BLOCKDEV) {
334 *pobject_type = DT_BLK;
335 tmp_inode->i_mode |= S_IFBLK;
336 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
337 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
338 } else if (type == UNIX_FIFO) {
339 *pobject_type = DT_FIFO;
340 tmp_inode->i_mode |= S_IFIFO;
341 } else if (type == UNIX_SOCKET) {
342 *pobject_type = DT_SOCK;
343 tmp_inode->i_mode |= S_IFSOCK;
345 /* safest to just call it a file */
346 *pobject_type = DT_REG;
347 tmp_inode->i_mode |= S_IFREG;
348 cFYI(1,("unknown inode type %d",type));
351 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
352 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
353 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
355 if (is_size_safe_to_change(cifsInfo)) {
356 /* can not safely change the file size here if the
357 client is writing to it due to potential races */
358 i_size_write(tmp_inode,end_of_file);
360 /* 512 bytes (2**9) is the fake blocksize that must be used */
361 /* for this calculation, not the real blocksize */
362 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
365 if (S_ISREG(tmp_inode->i_mode)) {
366 cFYI(1, ("File inode"));
367 tmp_inode->i_op = &cifs_file_inode_ops;
369 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
370 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
371 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
373 tmp_inode->i_fop = &cifs_file_direct_ops;
375 } else if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
376 tmp_inode->i_fop = &cifs_file_nobrl_ops;
378 tmp_inode->i_fop = &cifs_file_ops;
380 if((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
381 (cifs_sb->tcon->ses->server->maxBuf <
382 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
383 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
385 tmp_inode->i_data.a_ops = &cifs_addr_ops;
388 return; /* No sense invalidating pages for new inode since we
389 have not started caching readahead file data yet */
391 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
392 (local_size == tmp_inode->i_size)) {
393 cFYI(1, ("inode exists but unchanged"));
395 /* file may have changed on server */
396 cFYI(1, ("invalidate inode, readdir detected change"));
397 invalidate_remote_inode(tmp_inode);
399 } else if (S_ISDIR(tmp_inode->i_mode)) {
400 cFYI(1, ("Directory inode"));
401 tmp_inode->i_op = &cifs_dir_inode_ops;
402 tmp_inode->i_fop = &cifs_dir_ops;
403 } else if (S_ISLNK(tmp_inode->i_mode)) {
404 cFYI(1, ("Symbolic Link inode"));
405 tmp_inode->i_op = &cifs_symlink_inode_ops;
406 /* tmp_inode->i_fop = *//* do not need to set to anything */
408 cFYI(1, ("Special inode"));
409 init_special_inode(tmp_inode, tmp_inode->i_mode,
414 static int initiate_cifs_search(const int xid, struct file *file)
418 struct cifsFileInfo * cifsFile;
419 struct cifs_sb_info *cifs_sb;
420 struct cifsTconInfo *pTcon;
422 if(file->private_data == NULL) {
424 kmalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
427 if(file->private_data == NULL) {
430 memset(file->private_data,0,sizeof(struct cifsFileInfo));
432 cifsFile = file->private_data;
433 cifsFile->invalidHandle = TRUE;
434 cifsFile->srch_inf.endOfSearch = FALSE;
436 if(file->f_dentry == NULL)
439 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
443 pTcon = cifs_sb->tcon;
447 full_path = build_path_from_dentry(file->f_dentry);
449 if(full_path == NULL) {
453 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
456 /* test for Unix extensions */
457 if (pTcon->ses->capabilities & CAP_UNIX) {
458 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
459 } else if ((pTcon->ses->capabilities &
460 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
461 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
462 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
463 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
464 } else /* not srvinos - BB fixme add check for backlevel? */ {
465 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
468 rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
469 &cifsFile->netfid, &cifsFile->srch_inf,
470 cifs_sb->mnt_cifs_flags &
471 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
473 cifsFile->invalidHandle = FALSE;
474 if((rc == -EOPNOTSUPP) &&
475 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
476 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
483 /* return length of unicode string in bytes */
484 static int cifs_unicode_bytelen(char *str)
487 __le16 * ustr = (__le16 *)str;
489 for(len=0;len <= PATH_MAX;len++) {
493 cFYI(1,("Unicode string longer than PATH_MAX found"));
497 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
500 FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
502 if(level == SMB_FIND_FILE_INFO_STANDARD) {
503 FIND_FILE_STANDARD_INFO * pfData;
504 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
506 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
507 pfData->FileNameLength;
509 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
510 cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
511 /* validate that new_entry is not past end of SMB */
512 if(new_entry >= end_of_smb) {
514 ("search entry %p began after end of SMB %p old entry %p",
515 new_entry, end_of_smb, old_entry));
517 } else if(((level == SMB_FIND_FILE_INFO_STANDARD) &&
518 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) ||
519 ((level != SMB_FIND_FILE_INFO_STANDARD) &&
520 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
521 cERROR(1,("search entry %p extends after end of SMB %p",
522 new_entry, end_of_smb));
529 #define UNICODE_DOT cpu_to_le16(0x2e)
531 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
532 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
535 char * filename = NULL;
538 if(cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
539 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
540 filename = &pFindData->FileName[0];
541 if(cfile->srch_inf.unicode) {
542 len = cifs_unicode_bytelen(filename);
544 /* BB should we make this strnlen of PATH_MAX? */
545 len = strnlen(filename, 5);
547 } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
548 FILE_DIRECTORY_INFO * pFindData =
549 (FILE_DIRECTORY_INFO *)current_entry;
550 filename = &pFindData->FileName[0];
551 len = le32_to_cpu(pFindData->FileNameLength);
552 } else if(cfile->srch_inf.info_level ==
553 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
554 FILE_FULL_DIRECTORY_INFO * pFindData =
555 (FILE_FULL_DIRECTORY_INFO *)current_entry;
556 filename = &pFindData->FileName[0];
557 len = le32_to_cpu(pFindData->FileNameLength);
558 } else if(cfile->srch_inf.info_level ==
559 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
560 SEARCH_ID_FULL_DIR_INFO * pFindData =
561 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
562 filename = &pFindData->FileName[0];
563 len = le32_to_cpu(pFindData->FileNameLength);
564 } else if(cfile->srch_inf.info_level ==
565 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
566 FILE_BOTH_DIRECTORY_INFO * pFindData =
567 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
568 filename = &pFindData->FileName[0];
569 len = le32_to_cpu(pFindData->FileNameLength);
570 } else if(cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
571 FIND_FILE_STANDARD_INFO * pFindData =
572 (FIND_FILE_STANDARD_INFO *)current_entry;
573 filename = &pFindData->FileName[0];
574 len = pFindData->FileNameLength;
576 cFYI(1,("Unknown findfirst level %d",cfile->srch_inf.info_level));
580 if(cfile->srch_inf.unicode) {
581 __le16 *ufilename = (__le16 *)filename;
584 if(ufilename[0] == UNICODE_DOT)
586 } else if(len == 4) {
588 if((ufilename[0] == UNICODE_DOT)
589 &&(ufilename[1] == UNICODE_DOT))
594 if(filename[0] == '.')
596 } else if(len == 2) {
597 if((filename[0] == '.') && (filename[1] == '.'))
606 /* Check if directory that we are searching has changed so we can decide
607 whether we can use the cached search results from the previous search */
608 static int is_dir_changed(struct file * file)
610 struct inode * inode;
611 struct cifsInodeInfo *cifsInfo;
613 if(file->f_dentry == NULL)
616 inode = file->f_dentry->d_inode;
621 cifsInfo = CIFS_I(inode);
623 if(cifsInfo->time == 0)
624 return 1; /* directory was changed, perhaps due to unlink */
630 /* find the corresponding entry in the search */
631 /* Note that the SMB server returns search entries for . and .. which
632 complicates logic here if we choose to parse for them and we do not
633 assume that they are located in the findfirst return buffer.*/
634 /* We start counting in the buffer with entry 2 and increment for every
635 entry (do not increment for . or .. entry) */
636 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
637 struct file *file, char **ppCurrentEntry, int *num_to_ret)
641 loff_t first_entry_in_buffer;
642 loff_t index_to_find = file->f_pos;
643 struct cifsFileInfo * cifsFile = file->private_data;
644 /* check if index in the buffer */
646 if((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
647 (num_to_ret == NULL))
650 *ppCurrentEntry = NULL;
651 first_entry_in_buffer =
652 cifsFile->srch_inf.index_of_last_entry -
653 cifsFile->srch_inf.entries_in_buffer;
655 /* if first entry in buf is zero then is first buffer
656 in search response data which means it is likely . and ..
657 will be in this buffer, although some servers do not return
658 . and .. for the root of a drive and for those we need
659 to start two entries earlier */
661 #ifdef CONFIG_CIFS_DEBUG2
662 dump_cifs_file_struct(file, "In fce ");
664 if(((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
665 is_dir_changed(file)) ||
666 (index_to_find < first_entry_in_buffer)) {
667 /* close and restart search */
668 cFYI(1,("search backing up - close and restart search"));
669 cifsFile->invalidHandle = TRUE;
670 CIFSFindClose(xid, pTcon, cifsFile->netfid);
671 kfree(cifsFile->search_resume_name);
672 cifsFile->search_resume_name = NULL;
673 if(cifsFile->srch_inf.ntwrk_buf_start) {
674 cFYI(1,("freeing SMB ff cache buf on search rewind"));
675 if(cifsFile->srch_inf.smallBuf)
676 cifs_small_buf_release(cifsFile->srch_inf.
679 cifs_buf_release(cifsFile->srch_inf.
682 rc = initiate_cifs_search(xid,file);
684 cFYI(1,("error %d reinitiating a search on rewind",rc));
689 while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
690 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
691 cFYI(1,("calling findnext2"));
692 rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
693 &cifsFile->srch_inf);
697 if(index_to_find < cifsFile->srch_inf.index_of_last_entry) {
698 /* we found the buffer that contains the entry */
699 /* scan and find it */
701 char * current_entry;
702 char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
703 smbCalcSize((struct smb_hdr *)
704 cifsFile->srch_inf.ntwrk_buf_start);
706 current_entry = cifsFile->srch_inf.srch_entries_start;
707 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
708 - cifsFile->srch_inf.entries_in_buffer;
709 pos_in_buf = index_to_find - first_entry_in_buffer;
710 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
712 for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
713 /* go entry by entry figuring out which is first */
714 current_entry = nxt_dir_entry(current_entry,end_of_smb,
715 cifsFile->srch_inf.info_level);
717 if((current_entry == NULL) && (i < pos_in_buf)) {
718 /* BB fixme - check if we should flag this error */
719 cERROR(1,("reached end of buf searching for pos in buf"
720 " %d index to find %lld rc %d",
721 pos_in_buf,index_to_find,rc));
724 *ppCurrentEntry = current_entry;
726 cFYI(1,("index not in buffer - could not findnext into it"));
730 if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
731 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
734 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
739 /* inode num, inode type and filename returned */
740 static int cifs_get_name_from_search_buf(struct qstr *pqst,
741 char *current_entry, __u16 level, unsigned int unicode,
742 struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum)
745 unsigned int len = 0;
747 struct nls_table * nlt = cifs_sb->local_nls;
751 if(level == SMB_FIND_FILE_UNIX) {
752 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
754 filename = &pFindData->FileName[0];
756 len = cifs_unicode_bytelen(filename);
758 /* BB should we make this strnlen of PATH_MAX? */
759 len = strnlen(filename, PATH_MAX);
762 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
763 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
764 *pinum = pFindData->UniqueId;
765 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
766 FILE_DIRECTORY_INFO * pFindData =
767 (FILE_DIRECTORY_INFO *)current_entry;
768 filename = &pFindData->FileName[0];
769 len = le32_to_cpu(pFindData->FileNameLength);
770 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
771 FILE_FULL_DIRECTORY_INFO * pFindData =
772 (FILE_FULL_DIRECTORY_INFO *)current_entry;
773 filename = &pFindData->FileName[0];
774 len = le32_to_cpu(pFindData->FileNameLength);
775 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
776 SEARCH_ID_FULL_DIR_INFO * pFindData =
777 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
778 filename = &pFindData->FileName[0];
779 len = le32_to_cpu(pFindData->FileNameLength);
780 *pinum = pFindData->UniqueId;
781 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
782 FILE_BOTH_DIRECTORY_INFO * pFindData =
783 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
784 filename = &pFindData->FileName[0];
785 len = le32_to_cpu(pFindData->FileNameLength);
786 } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
787 FIND_FILE_STANDARD_INFO * pFindData =
788 (FIND_FILE_STANDARD_INFO *)current_entry;
789 filename = &pFindData->FileName[0];
790 /* one byte length, no name conversion */
791 len = (unsigned int)pFindData->FileNameLength;
793 cFYI(1,("Unknown findfirst level %d",level));
798 cERROR(1,("bad search response length %d past smb end", len));
803 /* BB fixme - test with long names */
804 /* Note converted filename can be longer than in unicode */
805 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
806 pqst->len = cifs_convertUCSpath((char *)pqst->name,
807 (__le16 *)filename, len/2, nlt);
809 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
810 (__le16 *)filename,len/2,nlt);
812 pqst->name = filename;
815 pqst->hash = full_name_hash(pqst->name,pqst->len);
816 /* cFYI(1,("filldir on %s",pqst->name)); */
820 static int cifs_filldir(char *pfindEntry, struct file *file,
821 filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
825 struct cifsFileInfo * pCifsF;
828 struct cifs_sb_info * cifs_sb;
829 struct inode *tmp_inode;
830 struct dentry *tmp_dentry;
832 /* get filename and len into qstring */
834 /* decide whether to create and populate ionde */
835 if((direntry == NULL) || (file == NULL))
838 pCifsF = file->private_data;
840 if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
843 if(file->f_dentry == NULL)
846 rc = cifs_entry_is_dot(pfindEntry,pCifsF);
847 /* skip . and .. since we added them first */
851 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
853 qstring.name = scratch_buf;
854 rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
855 pCifsF->srch_inf.info_level,
856 pCifsF->srch_inf.unicode,cifs_sb,
858 &inum /* returned */);
863 rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
864 if((tmp_inode == NULL) || (tmp_dentry == NULL))
868 /* inode created, we need to hash it with right inode number */
870 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
871 tmp_inode->i_ino = inum;
873 insert_inode_hash(tmp_inode);
876 /* we pass in rc below, indicating whether it is a new inode,
877 so we can figure out whether to invalidate the inode cached
878 data if the file has changed */
879 if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
880 unix_fill_in_inode(tmp_inode,
881 (FILE_UNIX_INFO *)pfindEntry,
883 else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
884 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
885 pfindEntry, &obj_type, rc);
887 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
889 if(rc) /* new inode - needs to be tied to dentry */ {
890 d_instantiate(tmp_dentry, tmp_inode);
892 d_rehash(tmp_dentry);
896 rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
897 tmp_inode->i_ino,obj_type);
899 cFYI(1,("filldir rc = %d",rc));
906 static int cifs_save_resume_key(const char *current_entry,
907 struct cifsFileInfo *cifsFile)
910 unsigned int len = 0;
914 if((cifsFile == NULL) || (current_entry == NULL))
917 level = cifsFile->srch_inf.info_level;
919 if(level == SMB_FIND_FILE_UNIX) {
920 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
922 filename = &pFindData->FileName[0];
923 if(cifsFile->srch_inf.unicode) {
924 len = cifs_unicode_bytelen(filename);
926 /* BB should we make this strnlen of PATH_MAX? */
927 len = strnlen(filename, PATH_MAX);
929 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
930 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
931 FILE_DIRECTORY_INFO * pFindData =
932 (FILE_DIRECTORY_INFO *)current_entry;
933 filename = &pFindData->FileName[0];
934 len = le32_to_cpu(pFindData->FileNameLength);
935 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
936 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
937 FILE_FULL_DIRECTORY_INFO * pFindData =
938 (FILE_FULL_DIRECTORY_INFO *)current_entry;
939 filename = &pFindData->FileName[0];
940 len = le32_to_cpu(pFindData->FileNameLength);
941 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
942 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
943 SEARCH_ID_FULL_DIR_INFO * pFindData =
944 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
945 filename = &pFindData->FileName[0];
946 len = le32_to_cpu(pFindData->FileNameLength);
947 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
948 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
949 FILE_BOTH_DIRECTORY_INFO * pFindData =
950 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
951 filename = &pFindData->FileName[0];
952 len = le32_to_cpu(pFindData->FileNameLength);
953 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
954 } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
955 FIND_FILE_STANDARD_INFO * pFindData =
956 (FIND_FILE_STANDARD_INFO *)current_entry;
957 filename = &pFindData->FileName[0];
958 /* one byte length, no name conversion */
959 len = (unsigned int)pFindData->FileNameLength;
960 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
962 cFYI(1,("Unknown findfirst level %d",level));
965 cifsFile->srch_inf.resume_name_len = len;
966 cifsFile->srch_inf.presume_name = filename;
970 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
974 struct cifs_sb_info *cifs_sb;
975 struct cifsTconInfo *pTcon;
976 struct cifsFileInfo *cifsFile = NULL;
977 char * current_entry;
979 char * tmp_buf = NULL;
985 if(file->f_dentry == NULL) {
990 cifs_sb = CIFS_SB(file->f_dentry->d_sb);
991 pTcon = cifs_sb->tcon;
995 switch ((int) file->f_pos) {
997 if (filldir(direntry, ".", 1, file->f_pos,
998 file->f_dentry->d_inode->i_ino, DT_DIR) < 0) {
999 cERROR(1, ("Filldir for current dir failed"));
1005 if (filldir(direntry, "..", 2, file->f_pos,
1006 file->f_dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
1007 cERROR(1, ("Filldir for parent dir failed"));
1013 /* 1) If search is active,
1014 is in current search buffer?
1015 if it before then restart search
1016 if after then keep searching till find it */
1018 if(file->private_data == NULL) {
1019 rc = initiate_cifs_search(xid,file);
1020 cFYI(1,("initiate cifs search rc %d",rc));
1026 if(file->private_data == NULL) {
1031 cifsFile = file->private_data;
1032 if (cifsFile->srch_inf.endOfSearch) {
1033 if(cifsFile->srch_inf.emptyDir) {
1034 cFYI(1, ("End of search, empty dir"));
1039 cifsFile->invalidHandle = TRUE;
1040 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1042 kfree(cifsFile->search_resume_name);
1043 cifsFile->search_resume_name = NULL; */
1045 rc = find_cifs_entry(xid,pTcon, file,
1046 ¤t_entry,&num_to_fill);
1048 cFYI(1,("fce error %d",rc));
1050 } else if (current_entry != NULL) {
1051 cFYI(1,("entry %lld found",file->f_pos));
1053 cFYI(1,("could not find entry"));
1056 cFYI(1,("loop through %d times filling dir for net buf %p",
1057 num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
1058 max_len = smbCalcSize((struct smb_hdr *)
1059 cifsFile->srch_inf.ntwrk_buf_start);
1060 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1062 /* To be safe - for UCS to UTF-8 with strings loaded
1063 with the rare long characters alloc more to account for
1064 such multibyte target UTF-8 characters. cifs_unicode.c,
1065 which actually does the conversion, has the same limit */
1066 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
1067 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
1068 if(current_entry == NULL) {
1069 /* evaluate whether this case is an error */
1070 cERROR(1,("past end of SMB num to fill %d i %d",
1074 /* if buggy server returns . and .. late do
1075 we want to check for that here? */
1076 rc = cifs_filldir(current_entry, file,
1077 filldir, direntry, tmp_buf, max_len);
1080 cifsFile->srch_inf.index_of_last_entry) {
1081 cFYI(1,("last entry in buf at pos %lld %s",
1082 file->f_pos,tmp_buf));
1083 cifs_save_resume_key(current_entry,cifsFile);
1087 nxt_dir_entry(current_entry, end_of_smb,
1088 cifsFile->srch_inf.info_level);