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 or filetype(mode) changed,
73 * then drop it and recreate it.
76 cifs_prime_dcache(struct dentry *parent, struct qstr *name,
77 struct cifs_fattr *fattr)
79 struct dentry *dentry, *alias;
81 struct super_block *sb = d_inode(parent)->i_sb;
82 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
84 cifs_dbg(FYI, "%s: for %s\n", __func__, name->name);
86 dentry = d_hash_and_lookup(parent, name);
91 inode = d_inode(dentry);
93 if (d_mountpoint(dentry))
96 * If we're generating inode numbers, then we don't
97 * want to clobber the existing one with the one that
98 * the readdir code created.
100 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
101 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
103 /* update inode in place
104 * if both i_ino and i_mode didn't change */
105 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid &&
106 (inode->i_mode & S_IFMT) ==
107 (fattr->cf_mode & S_IFMT)) {
108 cifs_fattr_to_inode(inode, fattr);
112 d_invalidate(dentry);
117 * If we know that the inode will need to be revalidated immediately,
118 * then don't create a new dentry for it. We'll end up doing an on
119 * the wire call either way and this spares us an invalidation.
121 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
124 dentry = d_alloc(parent, name);
128 inode = cifs_iget(sb, fattr);
132 alias = d_splice_alias(inode, dentry);
133 if (alias && !IS_ERR(alias))
140 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
142 fattr->cf_uid = cifs_sb->mnt_uid;
143 fattr->cf_gid = cifs_sb->mnt_gid;
145 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
146 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
147 fattr->cf_dtype = DT_DIR;
149 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
150 fattr->cf_dtype = DT_REG;
154 * We need to revalidate it further to make a decision about whether it
155 * is a symbolic link, DFS referral or a reparse point with a direct
156 * access like junctions, deduplicated files, NFS symlinks.
158 if (fattr->cf_cifsattrs & ATTR_REPARSE)
159 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
161 /* non-unix readdir doesn't provide nlink */
162 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
164 if (fattr->cf_cifsattrs & ATTR_READONLY)
165 fattr->cf_mode &= ~S_IWUGO;
168 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
169 * mark it for revalidation so that "ls -l" will look right. It might
170 * be super-slow, but if we don't do this then the ownership of files
171 * may look wrong since the inodes may not have timed out by the time
172 * "ls" does a stat() call on them.
174 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
175 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
177 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
178 fattr->cf_cifsattrs & ATTR_SYSTEM) {
179 if (fattr->cf_eof == 0) {
180 fattr->cf_mode &= ~S_IFMT;
181 fattr->cf_mode |= S_IFIFO;
182 fattr->cf_dtype = DT_FIFO;
185 * trying to get the type and mode via SFU can be slow,
186 * so just call those regular files for now, and mark
189 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
195 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
196 struct cifs_sb_info *cifs_sb)
198 memset(fattr, 0, sizeof(*fattr));
199 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
200 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
201 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
202 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
203 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
204 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
205 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
207 cifs_fill_common_info(fattr, cifs_sb);
211 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
212 struct cifs_sb_info *cifs_sb)
214 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
216 memset(fattr, 0, sizeof(*fattr));
217 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
218 info->LastAccessTime, offset);
219 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
220 info->LastWriteTime, offset);
221 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
222 info->LastWriteTime, offset);
224 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
225 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
226 fattr->cf_eof = le32_to_cpu(info->DataSize);
228 cifs_fill_common_info(fattr, cifs_sb);
231 /* BB eventually need to add the following helper function to
232 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
233 we try to do FindFirst on (NTFS) directory symlinks */
235 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
242 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
245 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
246 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
250 tmpbuffer = kmalloc(maxpath);
251 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
256 if (CIFSSMBClose(xid, ptcon, fid)) {
257 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
264 initiate_cifs_search(const unsigned int xid, struct file *file)
268 char *full_path = NULL;
269 struct cifsFileInfo *cifsFile;
270 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
271 struct tcon_link *tlink = NULL;
272 struct cifs_tcon *tcon;
273 struct TCP_Server_Info *server;
275 if (file->private_data == NULL) {
276 tlink = cifs_sb_tlink(cifs_sb);
278 return PTR_ERR(tlink);
280 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
281 if (cifsFile == NULL) {
285 spin_lock_init(&cifsFile->file_info_lock);
286 file->private_data = cifsFile;
287 cifsFile->tlink = cifs_get_tlink(tlink);
288 tcon = tlink_tcon(tlink);
290 cifsFile = file->private_data;
291 tcon = tlink_tcon(cifsFile->tlink);
294 server = tcon->ses->server;
296 if (!server->ops->query_dir_first) {
301 cifsFile->invalidHandle = true;
302 cifsFile->srch_inf.endOfSearch = false;
304 full_path = build_path_from_dentry(file->f_path.dentry);
305 if (full_path == NULL) {
310 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
313 /* test for Unix extensions */
314 /* but now check for them on the share/mount not on the SMB session */
315 /* if (cap_unix(tcon->ses) { */
317 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
318 else if ((tcon->ses->capabilities &
319 tcon->ses->server->vals->cap_nt_find) == 0) {
320 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
321 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
322 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
323 } else /* not srvinos - BB fixme add check for backlevel? */ {
324 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
327 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
328 if (backup_cred(cifs_sb))
329 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
331 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
332 &cifsFile->fid, search_flags,
333 &cifsFile->srch_inf);
336 cifsFile->invalidHandle = false;
337 /* BB add following call to handle readdir on new NTFS symlink errors
338 else if STATUS_STOPPED_ON_SYMLINK
339 call get_symlink_reparse_path and retry with new path */
340 else if ((rc == -EOPNOTSUPP) &&
341 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
342 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
347 cifs_put_tlink(tlink);
351 /* return length of unicode string in bytes */
352 static int cifs_unicode_bytelen(const char *str)
355 const __le16 *ustr = (const __le16 *)str;
357 for (len = 0; len <= PATH_MAX; len++) {
361 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
365 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
368 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
370 if (level == SMB_FIND_FILE_INFO_STANDARD) {
371 FIND_FILE_STANDARD_INFO *pfData;
372 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
374 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
375 pfData->FileNameLength;
377 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
378 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
379 /* validate that new_entry is not past end of SMB */
380 if (new_entry >= end_of_smb) {
381 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
382 new_entry, end_of_smb, old_entry);
384 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
385 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
386 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
387 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
388 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
389 new_entry, end_of_smb);
403 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
404 const FILE_UNIX_INFO *info, bool is_unicode)
406 de->name = &info->FileName[0];
408 de->namelen = cifs_unicode_bytelen(de->name);
410 de->namelen = strnlen(de->name, PATH_MAX);
411 de->resume_key = info->ResumeKey;
412 de->ino = le64_to_cpu(info->basic.UniqueId);
415 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
416 const FILE_DIRECTORY_INFO *info)
418 de->name = &info->FileName[0];
419 de->namelen = le32_to_cpu(info->FileNameLength);
420 de->resume_key = info->FileIndex;
423 static void cifs_fill_dirent_full(struct cifs_dirent *de,
424 const FILE_FULL_DIRECTORY_INFO *info)
426 de->name = &info->FileName[0];
427 de->namelen = le32_to_cpu(info->FileNameLength);
428 de->resume_key = info->FileIndex;
431 static void cifs_fill_dirent_search(struct cifs_dirent *de,
432 const SEARCH_ID_FULL_DIR_INFO *info)
434 de->name = &info->FileName[0];
435 de->namelen = le32_to_cpu(info->FileNameLength);
436 de->resume_key = info->FileIndex;
437 de->ino = le64_to_cpu(info->UniqueId);
440 static void cifs_fill_dirent_both(struct cifs_dirent *de,
441 const FILE_BOTH_DIRECTORY_INFO *info)
443 de->name = &info->FileName[0];
444 de->namelen = le32_to_cpu(info->FileNameLength);
445 de->resume_key = info->FileIndex;
448 static void cifs_fill_dirent_std(struct cifs_dirent *de,
449 const FIND_FILE_STANDARD_INFO *info)
451 de->name = &info->FileName[0];
452 /* one byte length, no endianess conversion */
453 de->namelen = info->FileNameLength;
454 de->resume_key = info->ResumeKey;
457 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
458 u16 level, bool is_unicode)
460 memset(de, 0, sizeof(*de));
463 case SMB_FIND_FILE_UNIX:
464 cifs_fill_dirent_unix(de, info, is_unicode);
466 case SMB_FIND_FILE_DIRECTORY_INFO:
467 cifs_fill_dirent_dir(de, info);
469 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
470 cifs_fill_dirent_full(de, info);
472 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
473 cifs_fill_dirent_search(de, info);
475 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
476 cifs_fill_dirent_both(de, info);
478 case SMB_FIND_FILE_INFO_STANDARD:
479 cifs_fill_dirent_std(de, info);
482 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
489 #define UNICODE_DOT cpu_to_le16(0x2e)
491 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
492 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
500 __le16 *ufilename = (__le16 *)de->name;
501 if (de->namelen == 2) {
503 if (ufilename[0] == UNICODE_DOT)
505 } else if (de->namelen == 4) {
507 if (ufilename[0] == UNICODE_DOT &&
508 ufilename[1] == UNICODE_DOT)
512 if (de->namelen == 1) {
513 if (de->name[0] == '.')
515 } else if (de->namelen == 2) {
516 if (de->name[0] == '.' && de->name[1] == '.')
524 /* Check if directory that we are searching has changed so we can decide
525 whether we can use the cached search results from the previous search */
526 static int is_dir_changed(struct file *file)
528 struct inode *inode = file_inode(file);
529 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
531 if (cifsInfo->time == 0)
532 return 1; /* directory was changed, perhaps due to unlink */
538 static int cifs_save_resume_key(const char *current_entry,
539 struct cifsFileInfo *file_info)
541 struct cifs_dirent de;
544 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
545 file_info->srch_inf.unicode);
547 file_info->srch_inf.presume_name = de.name;
548 file_info->srch_inf.resume_name_len = de.namelen;
549 file_info->srch_inf.resume_key = de.resume_key;
555 * Find the corresponding entry in the search. Note that the SMB server returns
556 * search entries for . and .. which complicates logic here if we choose to
557 * parse for them and we do not assume that they are located in the findfirst
558 * return buffer. We start counting in the buffer with entry 2 and increment for
559 * every entry (do not increment for . or .. entry).
562 find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
563 struct file *file, char **current_entry, int *num_to_ret)
568 loff_t first_entry_in_buffer;
569 loff_t index_to_find = pos;
570 struct cifsFileInfo *cfile = file->private_data;
571 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
572 struct TCP_Server_Info *server = tcon->ses->server;
573 /* check if index in the buffer */
575 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
578 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
581 *current_entry = NULL;
582 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
583 cfile->srch_inf.entries_in_buffer;
586 * If first entry in buf is zero then is first buffer
587 * in search response data which means it is likely . and ..
588 * will be in this buffer, although some servers do not return
589 * . and .. for the root of a drive and for those we need
590 * to start two entries earlier.
593 dump_cifs_file_struct(file, "In fce ");
594 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
595 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
596 /* close and restart search */
597 cifs_dbg(FYI, "search backing up - close and restart search\n");
598 spin_lock(&cfile->file_info_lock);
599 if (server->ops->dir_needs_close(cfile)) {
600 cfile->invalidHandle = true;
601 spin_unlock(&cfile->file_info_lock);
602 if (server->ops->close_dir)
603 server->ops->close_dir(xid, tcon, &cfile->fid);
605 spin_unlock(&cfile->file_info_lock);
606 if (cfile->srch_inf.ntwrk_buf_start) {
607 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
608 if (cfile->srch_inf.smallBuf)
609 cifs_small_buf_release(cfile->srch_inf.
612 cifs_buf_release(cfile->srch_inf.
614 cfile->srch_inf.ntwrk_buf_start = NULL;
616 rc = initiate_cifs_search(xid, file);
618 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
622 /* FindFirst/Next set last_entry to NULL on malformed reply */
623 if (cfile->srch_inf.last_entry)
624 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
627 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
628 if (backup_cred(cifs_sb))
629 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
631 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
632 (rc == 0) && !cfile->srch_inf.endOfSearch) {
633 cifs_dbg(FYI, "calling findnext2\n");
634 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
637 /* FindFirst/Next set last_entry to NULL on malformed reply */
638 if (cfile->srch_inf.last_entry)
639 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
643 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
644 /* we found the buffer that contains the entry */
645 /* scan and find it */
648 char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
649 server->ops->calc_smb_size(
650 cfile->srch_inf.ntwrk_buf_start);
652 cur_ent = cfile->srch_inf.srch_entries_start;
653 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
654 - cfile->srch_inf.entries_in_buffer;
655 pos_in_buf = index_to_find - first_entry_in_buffer;
656 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
658 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
659 /* go entry by entry figuring out which is first */
660 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
661 cfile->srch_inf.info_level);
663 if ((cur_ent == NULL) && (i < pos_in_buf)) {
664 /* BB fixme - check if we should flag this error */
665 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
666 pos_in_buf, index_to_find, rc);
669 *current_entry = cur_ent;
671 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
675 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
676 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
679 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
684 static int cifs_filldir(char *find_entry, struct file *file,
685 struct dir_context *ctx,
686 char *scratch_buf, unsigned int max_len)
688 struct cifsFileInfo *file_info = file->private_data;
689 struct super_block *sb = file_inode(file)->i_sb;
690 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
691 struct cifs_dirent de = { NULL, };
692 struct cifs_fattr fattr;
697 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
698 file_info->srch_inf.unicode);
702 if (de.namelen > max_len) {
703 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
708 /* skip . and .. since we added them first */
709 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
712 if (file_info->srch_inf.unicode) {
713 struct nls_table *nlt = cifs_sb->local_nls;
716 map_type = cifs_remap(cifs_sb);
717 name.name = scratch_buf;
719 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
721 min_t(size_t, de.namelen,
722 (size_t)max_len), nlt, map_type);
723 name.len -= nls_nullsize(nlt);
726 name.len = de.namelen;
729 switch (file_info->srch_inf.info_level) {
730 case SMB_FIND_FILE_UNIX:
731 cifs_unix_basic_to_fattr(&fattr,
732 &((FILE_UNIX_INFO *)find_entry)->basic,
735 case SMB_FIND_FILE_INFO_STANDARD:
736 cifs_std_info_to_fattr(&fattr,
737 (FIND_FILE_STANDARD_INFO *)find_entry,
741 cifs_dir_info_to_fattr(&fattr,
742 (FILE_DIRECTORY_INFO *)find_entry,
747 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
748 fattr.cf_uniqueid = de.ino;
750 fattr.cf_uniqueid = iunique(sb, ROOT_I);
751 cifs_autodisable_serverino(cifs_sb);
754 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
755 couldbe_mf_symlink(&fattr))
757 * trying to get the type and mode can be slow,
758 * so just call those regular files for now, and mark
761 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
763 cifs_prime_dcache(file->f_path.dentry, &name, &fattr);
765 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
766 return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype);
770 int cifs_readdir(struct file *file, struct dir_context *ctx)
775 struct cifs_tcon *tcon;
776 struct cifsFileInfo *cifsFile = NULL;
779 char *tmp_buf = NULL;
781 unsigned int max_len;
786 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
787 * '..'. Otherwise we won't be able to notify VFS in case of failure.
789 if (file->private_data == NULL) {
790 rc = initiate_cifs_search(xid, file);
791 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
796 if (!dir_emit_dots(file, ctx))
799 /* 1) If search is active,
800 is in current search buffer?
801 if it before then restart search
802 if after then keep searching till find it */
804 cifsFile = file->private_data;
805 if (cifsFile->srch_inf.endOfSearch) {
806 if (cifsFile->srch_inf.emptyDir) {
807 cifs_dbg(FYI, "End of search, empty dir\n");
812 cifsFile->invalidHandle = true;
813 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
816 tcon = tlink_tcon(cifsFile->tlink);
817 rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry,
820 cifs_dbg(FYI, "fce error %d\n", rc);
822 } else if (current_entry != NULL) {
823 cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
825 cifs_dbg(FYI, "could not find entry\n");
828 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
829 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
830 max_len = tcon->ses->server->ops->calc_smb_size(
831 cifsFile->srch_inf.ntwrk_buf_start);
832 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
834 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
835 if (tmp_buf == NULL) {
840 for (i = 0; i < num_to_fill; i++) {
841 if (current_entry == NULL) {
842 /* evaluate whether this case is an error */
843 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
848 * if buggy server returns . and .. late do we want to
849 * check for that here?
852 rc = cifs_filldir(current_entry, file, ctx,
862 cifsFile->srch_inf.index_of_last_entry) {
863 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
865 cifs_save_resume_key(current_entry, cifsFile);
869 nxt_dir_entry(current_entry, end_of_smb,
870 cifsFile->srch_inf.info_level);