4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2008
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>
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"));
47 if (cf->srch_inf.endOfSearch)
48 cFYI(1, ("end of search"));
49 if (cf->srch_inf.emptyDir)
50 cFYI(1, ("empty dir"));
55 /* Returns one if new inode created (which therefore needs to be hashed) */
56 /* Might check in the future if inode number changed so we can rehash inode */
57 static int construct_dentry(struct qstr *qstring, struct file *file,
58 struct inode **ptmp_inode, struct dentry **pnew_dentry)
60 struct dentry *tmp_dentry;
61 struct cifs_sb_info *cifs_sb;
62 struct cifsTconInfo *pTcon;
65 cFYI(1, ("For %s", qstring->name));
66 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
67 pTcon = cifs_sb->tcon;
69 qstring->hash = full_name_hash(qstring->name, qstring->len);
70 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
72 cFYI(0, ("existing dentry with inode 0x%p",
73 tmp_dentry->d_inode));
74 *ptmp_inode = tmp_dentry->d_inode;
75 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
76 if (*ptmp_inode == NULL) {
77 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
78 if (*ptmp_inode == NULL)
82 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
83 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
85 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
86 if (tmp_dentry == NULL) {
87 cERROR(1, ("Failed allocating dentry"));
92 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
94 tmp_dentry->d_op = &cifs_ci_dentry_ops;
96 tmp_dentry->d_op = &cifs_dentry_ops;
97 if (*ptmp_inode == NULL)
99 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
100 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
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, unsigned 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 #ifdef CONFIG_CIFS_EXPERIMENTAL
172 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
173 /* get more accurate mode via ACL - so force inode refresh */
176 #endif /* CONFIG_CIFS_EXPERIMENTAL */
177 cifsInfo->time = jiffies;
179 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
180 /* 2767 perms - indicate mandatory locking */
181 /* BB fill in uid and gid here? with help from winbind?
182 or retrieve from NTFS stream extended attribute */
183 if (atomic_read(&cifsInfo->inUse) == 0) {
184 tmp_inode->i_uid = cifs_sb->mnt_uid;
185 tmp_inode->i_gid = cifs_sb->mnt_gid;
186 /* set default mode. will override for dirs below */
187 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
189 /* mask off the type bits since it gets set
190 below and we do not want to get two type
192 tmp_inode->i_mode &= ~S_IFMT;
195 if (attr & ATTR_DIRECTORY) {
196 *pobject_type = DT_DIR;
197 /* override default perms since we do not lock dirs */
198 if (atomic_read(&cifsInfo->inUse) == 0)
199 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
200 tmp_inode->i_mode |= S_IFDIR;
201 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
202 (attr & ATTR_SYSTEM)) {
203 if (end_of_file == 0) {
204 *pobject_type = DT_FIFO;
205 tmp_inode->i_mode |= S_IFIFO;
207 /* rather than get the type here, we mark the
208 inode as needing revalidate and get the real type
209 (blk vs chr vs. symlink) later ie in lookup */
210 *pobject_type = DT_REG;
211 tmp_inode->i_mode |= S_IFREG;
214 /* we no longer mark these because we could not follow them */
215 /* } else if (attr & ATTR_REPARSE) {
216 *pobject_type = DT_LNK;
217 tmp_inode->i_mode |= S_IFLNK; */
219 *pobject_type = DT_REG;
220 tmp_inode->i_mode |= S_IFREG;
221 if (attr & ATTR_READONLY)
222 tmp_inode->i_mode &= ~(S_IWUGO);
223 else if ((tmp_inode->i_mode & S_IWUGO) == 0)
224 /* the ATTR_READONLY flag may have been changed on */
225 /* server -- set any w bits allowed by mnt_file_mode */
226 tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
227 } /* could add code here - to validate if device or weird share type? */
229 /* can not fill in nlink here as in qpathinfo version and Unx search */
230 if (atomic_read(&cifsInfo->inUse) == 0)
231 atomic_set(&cifsInfo->inUse, 1);
233 spin_lock(&tmp_inode->i_lock);
234 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
235 /* can not safely change the file size here if the
236 client is writing to it due to potential races */
237 i_size_write(tmp_inode, end_of_file);
239 /* 512 bytes (2**9) is the fake blocksize that must be used */
240 /* for this calculation, even though the reported blocksize is larger */
241 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
243 spin_unlock(&tmp_inode->i_lock);
245 if (allocation_size < end_of_file)
246 cFYI(1, ("May be sparse file, allocation less than file size"));
247 cFYI(1, ("File Size %ld and blocks %llu",
248 (unsigned long)tmp_inode->i_size,
249 (unsigned long long)tmp_inode->i_blocks));
250 if (S_ISREG(tmp_inode->i_mode)) {
251 cFYI(1, ("File inode"));
252 tmp_inode->i_op = &cifs_file_inode_ops;
253 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
254 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
255 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
257 tmp_inode->i_fop = &cifs_file_direct_ops;
258 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
259 tmp_inode->i_fop = &cifs_file_nobrl_ops;
261 tmp_inode->i_fop = &cifs_file_ops;
263 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
264 (cifs_sb->tcon->ses->server->maxBuf <
265 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
266 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
268 tmp_inode->i_data.a_ops = &cifs_addr_ops;
271 return; /* No sense invalidating pages for new inode
272 since have not started caching readahead file
275 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
276 (local_size == tmp_inode->i_size)) {
277 cFYI(1, ("inode exists but unchanged"));
279 /* file may have changed on server */
280 cFYI(1, ("invalidate inode, readdir detected change"));
281 invalidate_remote_inode(tmp_inode);
283 } else if (S_ISDIR(tmp_inode->i_mode)) {
284 cFYI(1, ("Directory inode"));
285 tmp_inode->i_op = &cifs_dir_inode_ops;
286 tmp_inode->i_fop = &cifs_dir_ops;
287 } else if (S_ISLNK(tmp_inode->i_mode)) {
288 cFYI(1, ("Symbolic Link inode"));
289 tmp_inode->i_op = &cifs_symlink_inode_ops;
291 cFYI(1, ("Init special inode"));
292 init_special_inode(tmp_inode, tmp_inode->i_mode,
297 static void unix_fill_in_inode(struct inode *tmp_inode,
298 FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode)
301 struct timespec local_mtime;
303 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
304 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
306 __u32 type = le32_to_cpu(pfindData->Type);
307 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
308 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
309 cifsInfo->time = jiffies;
310 atomic_inc(&cifsInfo->inUse);
312 /* save mtime and size */
313 local_mtime = tmp_inode->i_mtime;
314 local_size = tmp_inode->i_size;
317 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
319 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
321 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
323 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
324 /* since we set the inode type below we need to mask off type
325 to avoid strange results if bits above were corrupt */
326 tmp_inode->i_mode &= ~S_IFMT;
327 if (type == UNIX_FILE) {
328 *pobject_type = DT_REG;
329 tmp_inode->i_mode |= S_IFREG;
330 } else if (type == UNIX_SYMLINK) {
331 *pobject_type = DT_LNK;
332 tmp_inode->i_mode |= S_IFLNK;
333 } else if (type == UNIX_DIR) {
334 *pobject_type = DT_DIR;
335 tmp_inode->i_mode |= S_IFDIR;
336 } else if (type == UNIX_CHARDEV) {
337 *pobject_type = DT_CHR;
338 tmp_inode->i_mode |= S_IFCHR;
339 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
340 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
341 } else if (type == UNIX_BLOCKDEV) {
342 *pobject_type = DT_BLK;
343 tmp_inode->i_mode |= S_IFBLK;
344 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
345 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
346 } else if (type == UNIX_FIFO) {
347 *pobject_type = DT_FIFO;
348 tmp_inode->i_mode |= S_IFIFO;
349 } else if (type == UNIX_SOCKET) {
350 *pobject_type = DT_SOCK;
351 tmp_inode->i_mode |= S_IFSOCK;
353 /* safest to just call it a file */
354 *pobject_type = DT_REG;
355 tmp_inode->i_mode |= S_IFREG;
356 cFYI(1, ("unknown inode type %d", type));
359 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
360 tmp_inode->i_uid = cifs_sb->mnt_uid;
362 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
363 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
364 tmp_inode->i_gid = cifs_sb->mnt_gid;
366 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
367 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
369 spin_lock(&tmp_inode->i_lock);
370 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
371 /* can not safely change the file size here if the
372 client is writing to it due to potential races */
373 i_size_write(tmp_inode, end_of_file);
375 /* 512 bytes (2**9) is the fake blocksize that must be used */
376 /* for this calculation, not the real blocksize */
377 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
379 spin_unlock(&tmp_inode->i_lock);
381 if (S_ISREG(tmp_inode->i_mode)) {
382 cFYI(1, ("File inode"));
383 tmp_inode->i_op = &cifs_file_inode_ops;
385 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
386 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
387 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
389 tmp_inode->i_fop = &cifs_file_direct_ops;
390 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
391 tmp_inode->i_fop = &cifs_file_nobrl_ops;
393 tmp_inode->i_fop = &cifs_file_ops;
395 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
396 (cifs_sb->tcon->ses->server->maxBuf <
397 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
398 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
400 tmp_inode->i_data.a_ops = &cifs_addr_ops;
403 return; /* No sense invalidating pages for new inode
404 since we have not started caching readahead
405 file data for it yet */
407 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
408 (local_size == tmp_inode->i_size)) {
409 cFYI(1, ("inode exists but unchanged"));
411 /* file may have changed on server */
412 cFYI(1, ("invalidate inode, readdir detected change"));
413 invalidate_remote_inode(tmp_inode);
415 } else if (S_ISDIR(tmp_inode->i_mode)) {
416 cFYI(1, ("Directory inode"));
417 tmp_inode->i_op = &cifs_dir_inode_ops;
418 tmp_inode->i_fop = &cifs_dir_ops;
419 } else if (S_ISLNK(tmp_inode->i_mode)) {
420 cFYI(1, ("Symbolic Link inode"));
421 tmp_inode->i_op = &cifs_symlink_inode_ops;
422 /* tmp_inode->i_fop = *//* do not need to set to anything */
424 cFYI(1, ("Special inode"));
425 init_special_inode(tmp_inode, tmp_inode->i_mode,
430 static int initiate_cifs_search(const int xid, struct file *file)
434 struct cifsFileInfo *cifsFile;
435 struct cifs_sb_info *cifs_sb;
436 struct cifsTconInfo *pTcon;
438 if (file->private_data == NULL) {
440 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
443 if (file->private_data == NULL)
445 cifsFile = file->private_data;
446 cifsFile->invalidHandle = TRUE;
447 cifsFile->srch_inf.endOfSearch = FALSE;
449 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
453 pTcon = cifs_sb->tcon;
457 full_path = build_path_from_dentry(file->f_path.dentry);
459 if (full_path == NULL)
462 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
465 /* test for Unix extensions */
466 /* but now check for them on the share/mount not on the SMB session */
467 /* if (pTcon->ses->capabilities & CAP_UNIX) { */
469 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
470 else if ((pTcon->ses->capabilities &
471 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
472 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
473 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
474 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
475 } else /* not srvinos - BB fixme add check for backlevel? */ {
476 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
479 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
480 &cifsFile->netfid, &cifsFile->srch_inf,
481 cifs_sb->mnt_cifs_flags &
482 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
484 cifsFile->invalidHandle = FALSE;
485 if ((rc == -EOPNOTSUPP) &&
486 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
487 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
494 /* return length of unicode string in bytes */
495 static int cifs_unicode_bytelen(char *str)
498 __le16 *ustr = (__le16 *)str;
500 for (len = 0; len <= PATH_MAX; len++) {
504 cFYI(1, ("Unicode string longer than PATH_MAX found"));
508 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
511 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
513 if (level == SMB_FIND_FILE_INFO_STANDARD) {
514 FIND_FILE_STANDARD_INFO *pfData;
515 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
517 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
518 pfData->FileNameLength;
520 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
521 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
522 /* validate that new_entry is not past end of SMB */
523 if (new_entry >= end_of_smb) {
525 ("search entry %p began after end of SMB %p old entry %p",
526 new_entry, end_of_smb, old_entry));
528 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
529 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
530 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
531 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
532 cERROR(1, ("search entry %p extends after end of SMB %p",
533 new_entry, end_of_smb));
540 #define UNICODE_DOT cpu_to_le16(0x2e)
542 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
543 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
546 char *filename = NULL;
549 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
550 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
551 filename = &pFindData->FileName[0];
552 if (cfile->srch_inf.unicode) {
553 len = cifs_unicode_bytelen(filename);
555 /* BB should we make this strnlen of PATH_MAX? */
556 len = strnlen(filename, 5);
558 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
559 FILE_DIRECTORY_INFO *pFindData =
560 (FILE_DIRECTORY_INFO *)current_entry;
561 filename = &pFindData->FileName[0];
562 len = le32_to_cpu(pFindData->FileNameLength);
563 } else if (cfile->srch_inf.info_level ==
564 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
565 FILE_FULL_DIRECTORY_INFO *pFindData =
566 (FILE_FULL_DIRECTORY_INFO *)current_entry;
567 filename = &pFindData->FileName[0];
568 len = le32_to_cpu(pFindData->FileNameLength);
569 } else if (cfile->srch_inf.info_level ==
570 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
571 SEARCH_ID_FULL_DIR_INFO *pFindData =
572 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
573 filename = &pFindData->FileName[0];
574 len = le32_to_cpu(pFindData->FileNameLength);
575 } else if (cfile->srch_inf.info_level ==
576 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
577 FILE_BOTH_DIRECTORY_INFO *pFindData =
578 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
579 filename = &pFindData->FileName[0];
580 len = le32_to_cpu(pFindData->FileNameLength);
581 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
582 FIND_FILE_STANDARD_INFO *pFindData =
583 (FIND_FILE_STANDARD_INFO *)current_entry;
584 filename = &pFindData->FileName[0];
585 len = pFindData->FileNameLength;
587 cFYI(1, ("Unknown findfirst level %d",
588 cfile->srch_inf.info_level));
592 if (cfile->srch_inf.unicode) {
593 __le16 *ufilename = (__le16 *)filename;
596 if (ufilename[0] == UNICODE_DOT)
598 } else if (len == 4) {
600 if ((ufilename[0] == UNICODE_DOT)
601 && (ufilename[1] == UNICODE_DOT))
606 if (filename[0] == '.')
608 } else if (len == 2) {
609 if ((filename[0] == '.') && (filename[1] == '.'))
618 /* Check if directory that we are searching has changed so we can decide
619 whether we can use the cached search results from the previous search */
620 static int is_dir_changed(struct file *file)
622 struct inode *inode = file->f_path.dentry->d_inode;
623 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
625 if (cifsInfo->time == 0)
626 return 1; /* directory was changed, perhaps due to unlink */
632 /* find the corresponding entry in the search */
633 /* Note that the SMB server returns search entries for . and .. which
634 complicates logic here if we choose to parse for them and we do not
635 assume that they are located in the findfirst return buffer.*/
636 /* We start counting in the buffer with entry 2 and increment for every
637 entry (do not increment for . or .. entry) */
638 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
639 struct file *file, char **ppCurrentEntry, int *num_to_ret)
643 loff_t first_entry_in_buffer;
644 loff_t index_to_find = file->f_pos;
645 struct cifsFileInfo *cifsFile = file->private_data;
646 /* check if index in the buffer */
648 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
649 (num_to_ret == NULL))
652 *ppCurrentEntry = NULL;
653 first_entry_in_buffer =
654 cifsFile->srch_inf.index_of_last_entry -
655 cifsFile->srch_inf.entries_in_buffer;
657 /* if first entry in buf is zero then is first buffer
658 in search response data which means it is likely . and ..
659 will be in this buffer, although some servers do not return
660 . and .. for the root of a drive and for those we need
661 to start two entries earlier */
663 #ifdef CONFIG_CIFS_DEBUG2
664 dump_cifs_file_struct(file, "In fce ");
666 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
667 is_dir_changed(file)) ||
668 (index_to_find < first_entry_in_buffer)) {
669 /* close and restart search */
670 cFYI(1, ("search backing up - close and restart search"));
671 cifsFile->invalidHandle = TRUE;
672 CIFSFindClose(xid, pTcon, cifsFile->netfid);
673 kfree(cifsFile->search_resume_name);
674 cifsFile->search_resume_name = NULL;
675 if (cifsFile->srch_inf.ntwrk_buf_start) {
676 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
677 if (cifsFile->srch_inf.smallBuf)
678 cifs_small_buf_release(cifsFile->srch_inf.
681 cifs_buf_release(cifsFile->srch_inf.
684 rc = initiate_cifs_search(xid, file);
686 cFYI(1, ("error %d reinitiating a search on rewind",
692 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
693 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)) {
694 cFYI(1, ("calling findnext2"));
695 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
696 &cifsFile->srch_inf);
700 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
701 /* we found the buffer that contains the entry */
702 /* scan and find it */
705 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
706 smbCalcSize((struct smb_hdr *)
707 cifsFile->srch_inf.ntwrk_buf_start);
709 current_entry = cifsFile->srch_inf.srch_entries_start;
710 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
711 - cifsFile->srch_inf.entries_in_buffer;
712 pos_in_buf = index_to_find - first_entry_in_buffer;
713 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
715 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
716 /* go entry by entry figuring out which is first */
717 current_entry = nxt_dir_entry(current_entry, end_of_smb,
718 cifsFile->srch_inf.info_level);
720 if ((current_entry == NULL) && (i < pos_in_buf)) {
721 /* BB fixme - check if we should flag this error */
722 cERROR(1, ("reached end of buf searching for pos in buf"
723 " %d index to find %lld rc %d",
724 pos_in_buf, index_to_find, rc));
727 *ppCurrentEntry = current_entry;
729 cFYI(1, ("index not in buffer - could not findnext into it"));
733 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
734 cFYI(1, ("can not return entries pos_in_buf beyond last"));
737 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
742 /* inode num, inode type and filename returned */
743 static int cifs_get_name_from_search_buf(struct qstr *pqst,
744 char *current_entry, __u16 level, unsigned int unicode,
745 struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum)
748 unsigned int len = 0;
750 struct nls_table *nlt = cifs_sb->local_nls;
754 if (level == SMB_FIND_FILE_UNIX) {
755 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
757 filename = &pFindData->FileName[0];
759 len = cifs_unicode_bytelen(filename);
761 /* BB should we make this strnlen of PATH_MAX? */
762 len = strnlen(filename, PATH_MAX);
765 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB */
766 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
767 *pinum = pFindData->UniqueId;
768 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
769 FILE_DIRECTORY_INFO *pFindData =
770 (FILE_DIRECTORY_INFO *)current_entry;
771 filename = &pFindData->FileName[0];
772 len = le32_to_cpu(pFindData->FileNameLength);
773 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
774 FILE_FULL_DIRECTORY_INFO *pFindData =
775 (FILE_FULL_DIRECTORY_INFO *)current_entry;
776 filename = &pFindData->FileName[0];
777 len = le32_to_cpu(pFindData->FileNameLength);
778 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
779 SEARCH_ID_FULL_DIR_INFO *pFindData =
780 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
781 filename = &pFindData->FileName[0];
782 len = le32_to_cpu(pFindData->FileNameLength);
783 *pinum = pFindData->UniqueId;
784 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
785 FILE_BOTH_DIRECTORY_INFO *pFindData =
786 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
787 filename = &pFindData->FileName[0];
788 len = le32_to_cpu(pFindData->FileNameLength);
789 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
790 FIND_FILE_STANDARD_INFO *pFindData =
791 (FIND_FILE_STANDARD_INFO *)current_entry;
792 filename = &pFindData->FileName[0];
793 /* one byte length, no name conversion */
794 len = (unsigned int)pFindData->FileNameLength;
796 cFYI(1, ("Unknown findfirst level %d", level));
801 cERROR(1, ("bad search response length %d past smb end", len));
806 /* BB fixme - test with long names */
807 /* Note converted filename can be longer than in unicode */
808 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
809 pqst->len = cifs_convertUCSpath((char *)pqst->name,
810 (__le16 *)filename, len/2, nlt);
812 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
813 (__le16 *)filename, len/2, nlt);
815 pqst->name = filename;
818 pqst->hash = full_name_hash(pqst->name, pqst->len);
819 /* cFYI(1, ("filldir on %s",pqst->name)); */
823 static int cifs_filldir(char *pfindEntry, struct file *file,
824 filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
828 struct cifsFileInfo *pCifsF;
829 unsigned int obj_type;
831 struct cifs_sb_info *cifs_sb;
832 struct inode *tmp_inode;
833 struct dentry *tmp_dentry;
835 /* get filename and len into qstring */
837 /* decide whether to create and populate ionde */
838 if ((direntry == NULL) || (file == NULL))
841 pCifsF = file->private_data;
843 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
846 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
847 /* skip . and .. since we added them first */
851 cifs_sb = CIFS_SB(file->f_path.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
872 tmp_inode->i_ino = inum;
874 insert_inode_hash(tmp_inode);
877 /* we pass in rc below, indicating whether it is a new inode,
878 so we can figure out whether to invalidate the inode cached
879 data if the file has changed */
880 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
881 unix_fill_in_inode(tmp_inode,
882 (FILE_UNIX_INFO *)pfindEntry,
884 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
885 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
886 pfindEntry, &obj_type, rc);
888 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
890 if (rc) /* new inode - needs to be tied to dentry */ {
891 d_instantiate(tmp_dentry, tmp_inode);
893 d_rehash(tmp_dentry);
897 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
898 tmp_inode->i_ino, obj_type);
900 cFYI(1, ("filldir rc = %d", rc));
901 /* we can not return filldir errors to the caller
902 since they are "normal" when the stat blocksize
903 is too small - we return remapped error instead */
911 static int cifs_save_resume_key(const char *current_entry,
912 struct cifsFileInfo *cifsFile)
915 unsigned int len = 0;
919 if ((cifsFile == NULL) || (current_entry == NULL))
922 level = cifsFile->srch_inf.info_level;
924 if (level == SMB_FIND_FILE_UNIX) {
925 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
927 filename = &pFindData->FileName[0];
928 if (cifsFile->srch_inf.unicode) {
929 len = cifs_unicode_bytelen(filename);
931 /* BB should we make this strnlen of PATH_MAX? */
932 len = strnlen(filename, PATH_MAX);
934 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
935 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
936 FILE_DIRECTORY_INFO *pFindData =
937 (FILE_DIRECTORY_INFO *)current_entry;
938 filename = &pFindData->FileName[0];
939 len = le32_to_cpu(pFindData->FileNameLength);
940 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
941 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
942 FILE_FULL_DIRECTORY_INFO *pFindData =
943 (FILE_FULL_DIRECTORY_INFO *)current_entry;
944 filename = &pFindData->FileName[0];
945 len = le32_to_cpu(pFindData->FileNameLength);
946 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
947 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
948 SEARCH_ID_FULL_DIR_INFO *pFindData =
949 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
950 filename = &pFindData->FileName[0];
951 len = le32_to_cpu(pFindData->FileNameLength);
952 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
953 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
954 FILE_BOTH_DIRECTORY_INFO *pFindData =
955 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
956 filename = &pFindData->FileName[0];
957 len = le32_to_cpu(pFindData->FileNameLength);
958 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
959 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
960 FIND_FILE_STANDARD_INFO *pFindData =
961 (FIND_FILE_STANDARD_INFO *)current_entry;
962 filename = &pFindData->FileName[0];
963 /* one byte length, no name conversion */
964 len = (unsigned int)pFindData->FileNameLength;
965 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
967 cFYI(1, ("Unknown findfirst level %d", level));
970 cifsFile->srch_inf.resume_name_len = len;
971 cifsFile->srch_inf.presume_name = filename;
975 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
979 struct cifs_sb_info *cifs_sb;
980 struct cifsTconInfo *pTcon;
981 struct cifsFileInfo *cifsFile = NULL;
984 char *tmp_buf = NULL;
990 cifs_sb = CIFS_SB(file->f_path.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_path.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_path.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 SMB end, 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);
1078 if (rc == -EOVERFLOW) {
1085 cifsFile->srch_inf.index_of_last_entry) {
1086 cFYI(1, ("last entry in buf at pos %lld %s",
1087 file->f_pos, tmp_buf));
1088 cifs_save_resume_key(current_entry, cifsFile);
1092 nxt_dir_entry(current_entry, end_of_smb,
1093 cifsFile->srch_inf.info_level);