4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2008
7 * Copyright (C) Red Hat, Inc., 2011
8 * Author(s): Steve French (sfrench@us.ibm.com)
10 * This library is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU Lesser General Public License as published
12 * by the Free Software Foundation; either version 2.1 of the License, or
13 * (at your option) any later version.
15 * This library is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
18 * the GNU Lesser General Public License for more details.
20 * You should have received a copy of the GNU Lesser General Public License
21 * along with this library; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
25 #include <linux/pagemap.h>
26 #include <linux/slab.h>
27 #include <linux/stat.h>
30 #include "cifsproto.h"
31 #include "cifs_unicode.h"
32 #include "cifs_debug.h"
33 #include "cifs_fs_sb.h"
37 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
38 * characters alloc more to account for such multibyte target UTF-8
41 #define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
43 #ifdef CONFIG_CIFS_DEBUG2
44 static void dump_cifs_file_struct(struct file *file, char *label)
46 struct cifsFileInfo *cf;
49 cf = file->private_data;
51 cifs_dbg(FYI, "empty cifs private file data\n");
54 if (cf->invalidHandle)
55 cifs_dbg(FYI, "invalid handle\n");
56 if (cf->srch_inf.endOfSearch)
57 cifs_dbg(FYI, "end of search\n");
58 if (cf->srch_inf.emptyDir)
59 cifs_dbg(FYI, "empty dir\n");
63 static inline void dump_cifs_file_struct(struct file *file, char *label)
69 * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
71 * Find the dentry that matches "name". If there isn't one, create one. If it's
72 * a negative dentry or the uniqueid changed, then drop it and recreate it.
75 cifs_prime_dcache(struct dentry *parent, struct qstr *name,
76 struct cifs_fattr *fattr)
78 struct dentry *dentry, *alias;
80 struct super_block *sb = parent->d_inode->i_sb;
81 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
83 cifs_dbg(FYI, "%s: for %s\n", __func__, name->name);
85 dentry = d_hash_and_lookup(parent, name);
86 if (unlikely(IS_ERR(dentry)))
92 inode = dentry->d_inode;
95 * If we're generating inode numbers, then we don't
96 * want to clobber the existing one with the one that
97 * the readdir code created.
99 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
100 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
102 /* update inode in place if i_ino didn't change */
103 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
104 cifs_fattr_to_inode(inode, fattr);
108 err = d_invalidate(dentry);
115 * If we know that the inode will need to be revalidated immediately,
116 * then don't create a new dentry for it. We'll end up doing an on
117 * the wire call either way and this spares us an invalidation.
119 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
122 dentry = d_alloc(parent, name);
126 inode = cifs_iget(sb, fattr);
130 alias = d_materialise_unique(dentry, inode);
131 if (alias && !IS_ERR(alias))
138 * Is it possible that this directory might turn out to be a DFS referral
139 * once we go to try and use it?
142 cifs_dfs_is_possible(struct cifs_sb_info *cifs_sb)
144 #ifdef CONFIG_CIFS_DFS_UPCALL
145 struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
147 if (tcon->Flags & SMB_SHARE_IS_IN_DFS)
154 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
156 fattr->cf_uid = cifs_sb->mnt_uid;
157 fattr->cf_gid = cifs_sb->mnt_gid;
159 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
160 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
161 fattr->cf_dtype = DT_DIR;
163 * Windows CIFS servers generally make DFS referrals look
164 * like directories in FIND_* responses with the reparse
165 * attribute flag also set (since DFS junctions are
166 * reparse points). We must revalidate at least these
167 * directory inodes before trying to use them (if
168 * they are DFS we will get PATH_NOT_COVERED back
169 * when queried directly and can then try to connect
172 if (cifs_dfs_is_possible(cifs_sb) &&
173 (fattr->cf_cifsattrs & ATTR_REPARSE))
174 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
175 } else if (fattr->cf_cifsattrs & ATTR_REPARSE) {
176 fattr->cf_mode = S_IFLNK;
177 fattr->cf_dtype = DT_LNK;
179 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
180 fattr->cf_dtype = DT_REG;
183 if (fattr->cf_cifsattrs & ATTR_READONLY)
184 fattr->cf_mode &= ~S_IWUGO;
187 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
188 * mark it for revalidation so that "ls -l" will look right. It might
189 * be super-slow, but if we don't do this then the ownership of files
190 * may look wrong since the inodes may not have timed out by the time
191 * "ls" does a stat() call on them.
193 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
194 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
196 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
197 fattr->cf_cifsattrs & ATTR_SYSTEM) {
198 if (fattr->cf_eof == 0) {
199 fattr->cf_mode &= ~S_IFMT;
200 fattr->cf_mode |= S_IFIFO;
201 fattr->cf_dtype = DT_FIFO;
204 * trying to get the type and mode via SFU can be slow,
205 * so just call those regular files for now, and mark
208 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
214 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
215 struct cifs_sb_info *cifs_sb)
217 memset(fattr, 0, sizeof(*fattr));
218 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
219 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
220 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
221 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
222 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
223 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
224 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
226 cifs_fill_common_info(fattr, cifs_sb);
230 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
231 struct cifs_sb_info *cifs_sb)
233 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
235 memset(fattr, 0, sizeof(*fattr));
236 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
237 info->LastAccessTime, offset);
238 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
239 info->LastWriteTime, offset);
240 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
241 info->LastWriteTime, offset);
243 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
244 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
245 fattr->cf_eof = le32_to_cpu(info->DataSize);
247 cifs_fill_common_info(fattr, cifs_sb);
250 /* BB eventually need to add the following helper function to
251 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
252 we try to do FindFirst on (NTFS) directory symlinks */
254 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
261 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
264 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
265 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
267 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
269 tmpbuffer = kmalloc(maxpath);
270 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
275 if (CIFSSMBClose(xid, ptcon, fid)) {
276 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
283 initiate_cifs_search(const unsigned int xid, struct file *file)
287 char *full_path = NULL;
288 struct cifsFileInfo *cifsFile;
289 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
290 struct tcon_link *tlink = NULL;
291 struct cifs_tcon *tcon;
292 struct TCP_Server_Info *server;
294 if (file->private_data == NULL) {
295 tlink = cifs_sb_tlink(cifs_sb);
297 return PTR_ERR(tlink);
299 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
300 if (cifsFile == NULL) {
304 file->private_data = cifsFile;
305 cifsFile->tlink = cifs_get_tlink(tlink);
306 tcon = tlink_tcon(tlink);
308 cifsFile = file->private_data;
309 tcon = tlink_tcon(cifsFile->tlink);
312 server = tcon->ses->server;
314 if (!server->ops->query_dir_first) {
319 cifsFile->invalidHandle = true;
320 cifsFile->srch_inf.endOfSearch = false;
322 full_path = build_path_from_dentry(file->f_path.dentry);
323 if (full_path == NULL) {
328 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
331 /* test for Unix extensions */
332 /* but now check for them on the share/mount not on the SMB session */
333 /* if (cap_unix(tcon->ses) { */
335 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
336 else if ((tcon->ses->capabilities &
337 tcon->ses->server->vals->cap_nt_find) == 0) {
338 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
339 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
340 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
341 } else /* not srvinos - BB fixme add check for backlevel? */ {
342 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
345 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
346 if (backup_cred(cifs_sb))
347 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
349 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
350 &cifsFile->fid, search_flags,
351 &cifsFile->srch_inf);
354 cifsFile->invalidHandle = false;
355 /* BB add following call to handle readdir on new NTFS symlink errors
356 else if STATUS_STOPPED_ON_SYMLINK
357 call get_symlink_reparse_path and retry with new path */
358 else if ((rc == -EOPNOTSUPP) &&
359 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
360 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
365 cifs_put_tlink(tlink);
369 /* return length of unicode string in bytes */
370 static int cifs_unicode_bytelen(const char *str)
373 const __le16 *ustr = (const __le16 *)str;
375 for (len = 0; len <= PATH_MAX; len++) {
379 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
383 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
386 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
388 if (level == SMB_FIND_FILE_INFO_STANDARD) {
389 FIND_FILE_STANDARD_INFO *pfData;
390 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
392 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
393 pfData->FileNameLength;
395 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
396 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
397 /* validate that new_entry is not past end of SMB */
398 if (new_entry >= end_of_smb) {
399 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
400 new_entry, end_of_smb, old_entry);
402 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
403 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
404 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
405 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
406 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
407 new_entry, end_of_smb);
421 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
422 const FILE_UNIX_INFO *info, bool is_unicode)
424 de->name = &info->FileName[0];
426 de->namelen = cifs_unicode_bytelen(de->name);
428 de->namelen = strnlen(de->name, PATH_MAX);
429 de->resume_key = info->ResumeKey;
430 de->ino = le64_to_cpu(info->basic.UniqueId);
433 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
434 const FILE_DIRECTORY_INFO *info)
436 de->name = &info->FileName[0];
437 de->namelen = le32_to_cpu(info->FileNameLength);
438 de->resume_key = info->FileIndex;
441 static void cifs_fill_dirent_full(struct cifs_dirent *de,
442 const FILE_FULL_DIRECTORY_INFO *info)
444 de->name = &info->FileName[0];
445 de->namelen = le32_to_cpu(info->FileNameLength);
446 de->resume_key = info->FileIndex;
449 static void cifs_fill_dirent_search(struct cifs_dirent *de,
450 const SEARCH_ID_FULL_DIR_INFO *info)
452 de->name = &info->FileName[0];
453 de->namelen = le32_to_cpu(info->FileNameLength);
454 de->resume_key = info->FileIndex;
455 de->ino = le64_to_cpu(info->UniqueId);
458 static void cifs_fill_dirent_both(struct cifs_dirent *de,
459 const FILE_BOTH_DIRECTORY_INFO *info)
461 de->name = &info->FileName[0];
462 de->namelen = le32_to_cpu(info->FileNameLength);
463 de->resume_key = info->FileIndex;
466 static void cifs_fill_dirent_std(struct cifs_dirent *de,
467 const FIND_FILE_STANDARD_INFO *info)
469 de->name = &info->FileName[0];
470 /* one byte length, no endianess conversion */
471 de->namelen = info->FileNameLength;
472 de->resume_key = info->ResumeKey;
475 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
476 u16 level, bool is_unicode)
478 memset(de, 0, sizeof(*de));
481 case SMB_FIND_FILE_UNIX:
482 cifs_fill_dirent_unix(de, info, is_unicode);
484 case SMB_FIND_FILE_DIRECTORY_INFO:
485 cifs_fill_dirent_dir(de, info);
487 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
488 cifs_fill_dirent_full(de, info);
490 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
491 cifs_fill_dirent_search(de, info);
493 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
494 cifs_fill_dirent_both(de, info);
496 case SMB_FIND_FILE_INFO_STANDARD:
497 cifs_fill_dirent_std(de, info);
500 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
507 #define UNICODE_DOT cpu_to_le16(0x2e)
509 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
510 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
518 __le16 *ufilename = (__le16 *)de->name;
519 if (de->namelen == 2) {
521 if (ufilename[0] == UNICODE_DOT)
523 } else if (de->namelen == 4) {
525 if (ufilename[0] == UNICODE_DOT &&
526 ufilename[1] == UNICODE_DOT)
530 if (de->namelen == 1) {
531 if (de->name[0] == '.')
533 } else if (de->namelen == 2) {
534 if (de->name[0] == '.' && de->name[1] == '.')
542 /* Check if directory that we are searching has changed so we can decide
543 whether we can use the cached search results from the previous search */
544 static int is_dir_changed(struct file *file)
546 struct inode *inode = file_inode(file);
547 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
549 if (cifsInfo->time == 0)
550 return 1; /* directory was changed, perhaps due to unlink */
556 static int cifs_save_resume_key(const char *current_entry,
557 struct cifsFileInfo *file_info)
559 struct cifs_dirent de;
562 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
563 file_info->srch_inf.unicode);
565 file_info->srch_inf.presume_name = de.name;
566 file_info->srch_inf.resume_name_len = de.namelen;
567 file_info->srch_inf.resume_key = de.resume_key;
573 * Find the corresponding entry in the search. Note that the SMB server returns
574 * search entries for . and .. which complicates logic here if we choose to
575 * parse for them and we do not assume that they are located in the findfirst
576 * return buffer. We start counting in the buffer with entry 2 and increment for
577 * every entry (do not increment for . or .. entry).
580 find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
581 struct file *file, char **current_entry, int *num_to_ret)
586 loff_t first_entry_in_buffer;
587 loff_t index_to_find = pos;
588 struct cifsFileInfo *cfile = file->private_data;
589 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
590 struct TCP_Server_Info *server = tcon->ses->server;
591 /* check if index in the buffer */
593 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
596 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
599 *current_entry = NULL;
600 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
601 cfile->srch_inf.entries_in_buffer;
604 * If first entry in buf is zero then is first buffer
605 * in search response data which means it is likely . and ..
606 * will be in this buffer, although some servers do not return
607 * . and .. for the root of a drive and for those we need
608 * to start two entries earlier.
611 dump_cifs_file_struct(file, "In fce ");
612 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
613 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
614 /* close and restart search */
615 cifs_dbg(FYI, "search backing up - close and restart search\n");
616 spin_lock(&cifs_file_list_lock);
617 if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) {
618 cfile->invalidHandle = true;
619 spin_unlock(&cifs_file_list_lock);
620 if (server->ops->close)
621 server->ops->close(xid, tcon, &cfile->fid);
623 spin_unlock(&cifs_file_list_lock);
624 if (cfile->srch_inf.ntwrk_buf_start) {
625 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
626 if (cfile->srch_inf.smallBuf)
627 cifs_small_buf_release(cfile->srch_inf.
630 cifs_buf_release(cfile->srch_inf.
632 cfile->srch_inf.ntwrk_buf_start = NULL;
634 rc = initiate_cifs_search(xid, file);
636 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
640 /* FindFirst/Next set last_entry to NULL on malformed reply */
641 if (cfile->srch_inf.last_entry)
642 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
645 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
646 if (backup_cred(cifs_sb))
647 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
649 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
650 (rc == 0) && !cfile->srch_inf.endOfSearch) {
651 cifs_dbg(FYI, "calling findnext2\n");
652 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
655 /* FindFirst/Next set last_entry to NULL on malformed reply */
656 if (cfile->srch_inf.last_entry)
657 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
661 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
662 /* we found the buffer that contains the entry */
663 /* scan and find it */
666 char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
667 server->ops->calc_smb_size(
668 cfile->srch_inf.ntwrk_buf_start);
670 cur_ent = cfile->srch_inf.srch_entries_start;
671 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
672 - cfile->srch_inf.entries_in_buffer;
673 pos_in_buf = index_to_find - first_entry_in_buffer;
674 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
676 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
677 /* go entry by entry figuring out which is first */
678 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
679 cfile->srch_inf.info_level);
681 if ((cur_ent == NULL) && (i < pos_in_buf)) {
682 /* BB fixme - check if we should flag this error */
683 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
684 pos_in_buf, index_to_find, rc);
687 *current_entry = cur_ent;
689 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
693 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
694 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
697 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
702 static int cifs_filldir(char *find_entry, struct file *file,
703 struct dir_context *ctx,
704 char *scratch_buf, unsigned int max_len)
706 struct cifsFileInfo *file_info = file->private_data;
707 struct super_block *sb = file->f_path.dentry->d_sb;
708 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
709 struct cifs_dirent de = { NULL, };
710 struct cifs_fattr fattr;
715 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
716 file_info->srch_inf.unicode);
720 if (de.namelen > max_len) {
721 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
726 /* skip . and .. since we added them first */
727 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
730 if (file_info->srch_inf.unicode) {
731 struct nls_table *nlt = cifs_sb->local_nls;
733 name.name = scratch_buf;
735 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
737 min_t(size_t, de.namelen,
738 (size_t)max_len), nlt,
739 cifs_sb->mnt_cifs_flags &
740 CIFS_MOUNT_MAP_SPECIAL_CHR);
741 name.len -= nls_nullsize(nlt);
744 name.len = de.namelen;
747 switch (file_info->srch_inf.info_level) {
748 case SMB_FIND_FILE_UNIX:
749 cifs_unix_basic_to_fattr(&fattr,
750 &((FILE_UNIX_INFO *)find_entry)->basic,
753 case SMB_FIND_FILE_INFO_STANDARD:
754 cifs_std_info_to_fattr(&fattr,
755 (FIND_FILE_STANDARD_INFO *)find_entry,
759 cifs_dir_info_to_fattr(&fattr,
760 (FILE_DIRECTORY_INFO *)find_entry,
765 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
766 fattr.cf_uniqueid = de.ino;
768 fattr.cf_uniqueid = iunique(sb, ROOT_I);
769 cifs_autodisable_serverino(cifs_sb);
772 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
773 CIFSCouldBeMFSymlink(&fattr))
775 * trying to get the type and mode can be slow,
776 * so just call those regular files for now, and mark
779 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
781 cifs_prime_dcache(file->f_dentry, &name, &fattr);
783 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
784 return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype);
788 int cifs_readdir(struct file *file, struct dir_context *ctx)
793 struct cifs_tcon *tcon;
794 struct cifsFileInfo *cifsFile = NULL;
797 char *tmp_buf = NULL;
799 unsigned int max_len;
804 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
805 * '..'. Otherwise we won't be able to notify VFS in case of failure.
807 if (file->private_data == NULL) {
808 rc = initiate_cifs_search(xid, file);
809 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
814 if (!dir_emit_dots(file, ctx))
817 /* 1) If search is active,
818 is in current search buffer?
819 if it before then restart search
820 if after then keep searching till find it */
822 if (file->private_data == NULL) {
826 cifsFile = file->private_data;
827 if (cifsFile->srch_inf.endOfSearch) {
828 if (cifsFile->srch_inf.emptyDir) {
829 cifs_dbg(FYI, "End of search, empty dir\n");
834 cifsFile->invalidHandle = true;
835 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
838 tcon = tlink_tcon(cifsFile->tlink);
839 rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry,
842 cifs_dbg(FYI, "fce error %d\n", rc);
844 } else if (current_entry != NULL) {
845 cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
847 cifs_dbg(FYI, "could not find entry\n");
850 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
851 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
852 max_len = tcon->ses->server->ops->calc_smb_size(
853 cifsFile->srch_inf.ntwrk_buf_start);
854 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
856 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
857 if (tmp_buf == NULL) {
862 for (i = 0; i < num_to_fill; i++) {
863 if (current_entry == NULL) {
864 /* evaluate whether this case is an error */
865 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
870 * if buggy server returns . and .. late do we want to
871 * check for that here?
873 rc = cifs_filldir(current_entry, file, ctx,
883 cifsFile->srch_inf.index_of_last_entry) {
884 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
886 cifs_save_resume_key(current_entry, cifsFile);
890 nxt_dir_entry(current_entry, end_of_smb,
891 cifsFile->srch_inf.info_level);