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 = parent->d_sb;
82 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
83 DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
85 cifs_dbg(FYI, "%s: for %s\n", __func__, name->name);
87 dentry = d_hash_and_lookup(parent, name);
90 * If we know that the inode will need to be revalidated
91 * immediately, then don't create a new dentry for it.
92 * We'll end up doing an on the wire call either way and
93 * this spares us an invalidation.
95 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
98 dentry = d_alloc_parallel(parent, name, &wq);
102 if (!d_in_lookup(dentry)) {
103 inode = d_inode(dentry);
105 if (d_mountpoint(dentry)) {
110 * If we're generating inode numbers, then we don't
111 * want to clobber the existing one with the one that
112 * the readdir code created.
114 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
115 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
117 /* update inode in place
118 * if both i_ino and i_mode didn't change */
119 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid &&
120 (inode->i_mode & S_IFMT) ==
121 (fattr->cf_mode & S_IFMT)) {
122 cifs_fattr_to_inode(inode, fattr);
127 d_invalidate(dentry);
131 inode = cifs_iget(sb, fattr);
133 inode = ERR_PTR(-ENOMEM);
134 alias = d_splice_alias(inode, dentry);
135 d_lookup_done(dentry);
136 if (alias && !IS_ERR(alias))
143 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
145 fattr->cf_uid = cifs_sb->mnt_uid;
146 fattr->cf_gid = cifs_sb->mnt_gid;
148 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
149 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
150 fattr->cf_dtype = DT_DIR;
152 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
153 fattr->cf_dtype = DT_REG;
157 * We need to revalidate it further to make a decision about whether it
158 * is a symbolic link, DFS referral or a reparse point with a direct
159 * access like junctions, deduplicated files, NFS symlinks.
161 if (fattr->cf_cifsattrs & ATTR_REPARSE)
162 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
164 /* non-unix readdir doesn't provide nlink */
165 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
167 if (fattr->cf_cifsattrs & ATTR_READONLY)
168 fattr->cf_mode &= ~S_IWUGO;
171 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
172 * mark it for revalidation so that "ls -l" will look right. It might
173 * be super-slow, but if we don't do this then the ownership of files
174 * may look wrong since the inodes may not have timed out by the time
175 * "ls" does a stat() call on them.
177 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
178 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
180 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
181 fattr->cf_cifsattrs & ATTR_SYSTEM) {
182 if (fattr->cf_eof == 0) {
183 fattr->cf_mode &= ~S_IFMT;
184 fattr->cf_mode |= S_IFIFO;
185 fattr->cf_dtype = DT_FIFO;
188 * trying to get the type and mode via SFU can be slow,
189 * so just call those regular files for now, and mark
192 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
198 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
199 struct cifs_sb_info *cifs_sb)
201 memset(fattr, 0, sizeof(*fattr));
202 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
203 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
204 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
205 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
206 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
207 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
208 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
210 cifs_fill_common_info(fattr, cifs_sb);
214 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
215 struct cifs_sb_info *cifs_sb)
217 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
219 memset(fattr, 0, sizeof(*fattr));
220 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
221 info->LastAccessTime, offset);
222 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
223 info->LastWriteTime, offset);
224 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
225 info->LastWriteTime, offset);
227 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
228 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
229 fattr->cf_eof = le32_to_cpu(info->DataSize);
231 cifs_fill_common_info(fattr, cifs_sb);
234 /* BB eventually need to add the following helper function to
235 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
236 we try to do FindFirst on (NTFS) directory symlinks */
238 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
245 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
248 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
249 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
253 tmpbuffer = kmalloc(maxpath);
254 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
259 if (CIFSSMBClose(xid, ptcon, fid)) {
260 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
267 initiate_cifs_search(const unsigned int xid, struct file *file)
271 char *full_path = NULL;
272 struct cifsFileInfo *cifsFile;
273 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
274 struct tcon_link *tlink = NULL;
275 struct cifs_tcon *tcon;
276 struct TCP_Server_Info *server;
278 if (file->private_data == NULL) {
279 tlink = cifs_sb_tlink(cifs_sb);
281 return PTR_ERR(tlink);
283 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
284 if (cifsFile == NULL) {
288 spin_lock_init(&cifsFile->file_info_lock);
289 file->private_data = cifsFile;
290 cifsFile->tlink = cifs_get_tlink(tlink);
291 tcon = tlink_tcon(tlink);
293 cifsFile = file->private_data;
294 tcon = tlink_tcon(cifsFile->tlink);
297 server = tcon->ses->server;
299 if (!server->ops->query_dir_first) {
304 cifsFile->invalidHandle = true;
305 cifsFile->srch_inf.endOfSearch = false;
307 full_path = build_path_from_dentry(file_dentry(file));
308 if (full_path == NULL) {
313 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
316 /* test for Unix extensions */
317 /* but now check for them on the share/mount not on the SMB session */
318 /* if (cap_unix(tcon->ses) { */
320 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
321 else if ((tcon->ses->capabilities &
322 tcon->ses->server->vals->cap_nt_find) == 0) {
323 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
324 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
325 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
326 } else /* not srvinos - BB fixme add check for backlevel? */ {
327 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
330 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
331 if (backup_cred(cifs_sb))
332 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
334 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
335 &cifsFile->fid, search_flags,
336 &cifsFile->srch_inf);
339 cifsFile->invalidHandle = false;
340 /* BB add following call to handle readdir on new NTFS symlink errors
341 else if STATUS_STOPPED_ON_SYMLINK
342 call get_symlink_reparse_path and retry with new path */
343 else if ((rc == -EOPNOTSUPP) &&
344 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
345 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
350 cifs_put_tlink(tlink);
354 /* return length of unicode string in bytes */
355 static int cifs_unicode_bytelen(const char *str)
358 const __le16 *ustr = (const __le16 *)str;
360 for (len = 0; len <= PATH_MAX; len++) {
364 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
368 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
371 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
373 if (level == SMB_FIND_FILE_INFO_STANDARD) {
374 FIND_FILE_STANDARD_INFO *pfData;
375 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
377 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
378 pfData->FileNameLength;
380 u32 next_offset = le32_to_cpu(pDirInfo->NextEntryOffset);
382 if (old_entry + next_offset < old_entry) {
383 cifs_dbg(VFS, "invalid offset %u\n", next_offset);
386 new_entry = old_entry + next_offset;
388 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
389 /* validate that new_entry is not past end of SMB */
390 if (new_entry >= end_of_smb) {
391 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
392 new_entry, end_of_smb, old_entry);
394 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
395 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
396 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
397 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
398 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
399 new_entry, end_of_smb);
413 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
414 const FILE_UNIX_INFO *info, bool is_unicode)
416 de->name = &info->FileName[0];
418 de->namelen = cifs_unicode_bytelen(de->name);
420 de->namelen = strnlen(de->name, PATH_MAX);
421 de->resume_key = info->ResumeKey;
422 de->ino = le64_to_cpu(info->basic.UniqueId);
425 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
426 const FILE_DIRECTORY_INFO *info)
428 de->name = &info->FileName[0];
429 de->namelen = le32_to_cpu(info->FileNameLength);
430 de->resume_key = info->FileIndex;
433 static void cifs_fill_dirent_full(struct cifs_dirent *de,
434 const FILE_FULL_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_search(struct cifs_dirent *de,
442 const SEARCH_ID_FULL_DIR_INFO *info)
444 de->name = &info->FileName[0];
445 de->namelen = le32_to_cpu(info->FileNameLength);
446 de->resume_key = info->FileIndex;
447 de->ino = le64_to_cpu(info->UniqueId);
450 static void cifs_fill_dirent_both(struct cifs_dirent *de,
451 const FILE_BOTH_DIRECTORY_INFO *info)
453 de->name = &info->FileName[0];
454 de->namelen = le32_to_cpu(info->FileNameLength);
455 de->resume_key = info->FileIndex;
458 static void cifs_fill_dirent_std(struct cifs_dirent *de,
459 const FIND_FILE_STANDARD_INFO *info)
461 de->name = &info->FileName[0];
462 /* one byte length, no endianess conversion */
463 de->namelen = info->FileNameLength;
464 de->resume_key = info->ResumeKey;
467 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
468 u16 level, bool is_unicode)
470 memset(de, 0, sizeof(*de));
473 case SMB_FIND_FILE_UNIX:
474 cifs_fill_dirent_unix(de, info, is_unicode);
476 case SMB_FIND_FILE_DIRECTORY_INFO:
477 cifs_fill_dirent_dir(de, info);
479 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
480 cifs_fill_dirent_full(de, info);
482 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
483 cifs_fill_dirent_search(de, info);
485 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
486 cifs_fill_dirent_both(de, info);
488 case SMB_FIND_FILE_INFO_STANDARD:
489 cifs_fill_dirent_std(de, info);
492 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
499 #define UNICODE_DOT cpu_to_le16(0x2e)
501 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
502 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
510 __le16 *ufilename = (__le16 *)de->name;
511 if (de->namelen == 2) {
513 if (ufilename[0] == UNICODE_DOT)
515 } else if (de->namelen == 4) {
517 if (ufilename[0] == UNICODE_DOT &&
518 ufilename[1] == UNICODE_DOT)
522 if (de->namelen == 1) {
523 if (de->name[0] == '.')
525 } else if (de->namelen == 2) {
526 if (de->name[0] == '.' && de->name[1] == '.')
534 /* Check if directory that we are searching has changed so we can decide
535 whether we can use the cached search results from the previous search */
536 static int is_dir_changed(struct file *file)
538 struct inode *inode = file_inode(file);
539 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
541 if (cifsInfo->time == 0)
542 return 1; /* directory was changed, perhaps due to unlink */
548 static int cifs_save_resume_key(const char *current_entry,
549 struct cifsFileInfo *file_info)
551 struct cifs_dirent de;
554 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
555 file_info->srch_inf.unicode);
557 file_info->srch_inf.presume_name = de.name;
558 file_info->srch_inf.resume_name_len = de.namelen;
559 file_info->srch_inf.resume_key = de.resume_key;
565 * Find the corresponding entry in the search. Note that the SMB server returns
566 * search entries for . and .. which complicates logic here if we choose to
567 * parse for them and we do not assume that they are located in the findfirst
568 * return buffer. We start counting in the buffer with entry 2 and increment for
569 * every entry (do not increment for . or .. entry).
572 find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
573 struct file *file, char **current_entry, int *num_to_ret)
578 loff_t first_entry_in_buffer;
579 loff_t index_to_find = pos;
580 struct cifsFileInfo *cfile = file->private_data;
581 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
582 struct TCP_Server_Info *server = tcon->ses->server;
583 /* check if index in the buffer */
585 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
588 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
591 *current_entry = NULL;
592 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
593 cfile->srch_inf.entries_in_buffer;
596 * If first entry in buf is zero then is first buffer
597 * in search response data which means it is likely . and ..
598 * will be in this buffer, although some servers do not return
599 * . and .. for the root of a drive and for those we need
600 * to start two entries earlier.
603 dump_cifs_file_struct(file, "In fce ");
604 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
605 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
606 /* close and restart search */
607 cifs_dbg(FYI, "search backing up - close and restart search\n");
608 spin_lock(&cfile->file_info_lock);
609 if (server->ops->dir_needs_close(cfile)) {
610 cfile->invalidHandle = true;
611 spin_unlock(&cfile->file_info_lock);
612 if (server->ops->close_dir)
613 server->ops->close_dir(xid, tcon, &cfile->fid);
615 spin_unlock(&cfile->file_info_lock);
616 if (cfile->srch_inf.ntwrk_buf_start) {
617 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
618 if (cfile->srch_inf.smallBuf)
619 cifs_small_buf_release(cfile->srch_inf.
622 cifs_buf_release(cfile->srch_inf.
624 cfile->srch_inf.ntwrk_buf_start = NULL;
626 rc = initiate_cifs_search(xid, file);
628 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
632 /* FindFirst/Next set last_entry to NULL on malformed reply */
633 if (cfile->srch_inf.last_entry)
634 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
637 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
638 if (backup_cred(cifs_sb))
639 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
641 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
642 (rc == 0) && !cfile->srch_inf.endOfSearch) {
643 cifs_dbg(FYI, "calling findnext2\n");
644 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
647 /* FindFirst/Next set last_entry to NULL on malformed reply */
648 if (cfile->srch_inf.last_entry)
649 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
653 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
654 /* we found the buffer that contains the entry */
655 /* scan and find it */
660 if (cfile->srch_inf.ntwrk_buf_start == NULL) {
661 cifs_dbg(VFS, "ntwrk_buf_start is NULL during readdir\n");
665 end_of_smb = cfile->srch_inf.ntwrk_buf_start +
666 server->ops->calc_smb_size(
667 cfile->srch_inf.ntwrk_buf_start);
669 cur_ent = cfile->srch_inf.srch_entries_start;
670 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
671 - cfile->srch_inf.entries_in_buffer;
672 pos_in_buf = index_to_find - first_entry_in_buffer;
673 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
675 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
676 /* go entry by entry figuring out which is first */
677 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
678 cfile->srch_inf.info_level);
680 if ((cur_ent == NULL) && (i < pos_in_buf)) {
681 /* BB fixme - check if we should flag this error */
682 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
683 pos_in_buf, index_to_find, rc);
686 *current_entry = cur_ent;
688 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
692 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
693 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
696 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
701 static int cifs_filldir(char *find_entry, struct file *file,
702 struct dir_context *ctx,
703 char *scratch_buf, unsigned int max_len)
705 struct cifsFileInfo *file_info = file->private_data;
706 struct super_block *sb = file_inode(file)->i_sb;
707 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
708 struct cifs_dirent de = { NULL, };
709 struct cifs_fattr fattr;
714 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
715 file_info->srch_inf.unicode);
719 if (de.namelen > max_len) {
720 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
725 /* skip . and .. since we added them first */
726 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
729 if (file_info->srch_inf.unicode) {
730 struct nls_table *nlt = cifs_sb->local_nls;
733 map_type = cifs_remap(cifs_sb);
734 name.name = scratch_buf;
736 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
738 min_t(size_t, de.namelen,
739 (size_t)max_len), nlt, map_type);
740 name.len -= nls_nullsize(nlt);
743 name.len = de.namelen;
746 switch (file_info->srch_inf.info_level) {
747 case SMB_FIND_FILE_UNIX:
748 cifs_unix_basic_to_fattr(&fattr,
749 &((FILE_UNIX_INFO *)find_entry)->basic,
752 case SMB_FIND_FILE_INFO_STANDARD:
753 cifs_std_info_to_fattr(&fattr,
754 (FIND_FILE_STANDARD_INFO *)find_entry,
758 cifs_dir_info_to_fattr(&fattr,
759 (FILE_DIRECTORY_INFO *)find_entry,
764 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
765 fattr.cf_uniqueid = de.ino;
767 fattr.cf_uniqueid = iunique(sb, ROOT_I);
768 cifs_autodisable_serverino(cifs_sb);
771 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
772 couldbe_mf_symlink(&fattr))
774 * trying to get the type and mode can be slow,
775 * so just call those regular files for now, and mark
778 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
780 cifs_prime_dcache(file_dentry(file), &name, &fattr);
782 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
783 return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype);
787 int cifs_readdir(struct file *file, struct dir_context *ctx)
792 struct cifs_tcon *tcon;
793 struct cifsFileInfo *cifsFile = NULL;
796 char *tmp_buf = NULL;
798 unsigned int max_len;
803 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
804 * '..'. Otherwise we won't be able to notify VFS in case of failure.
806 if (file->private_data == NULL) {
807 rc = initiate_cifs_search(xid, file);
808 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
813 if (!dir_emit_dots(file, ctx))
816 /* 1) If search is active,
817 is in current search buffer?
818 if it before then restart search
819 if after then keep searching till find it */
821 cifsFile = file->private_data;
822 if (cifsFile->srch_inf.endOfSearch) {
823 if (cifsFile->srch_inf.emptyDir) {
824 cifs_dbg(FYI, "End of search, empty dir\n");
829 cifsFile->invalidHandle = true;
830 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
833 tcon = tlink_tcon(cifsFile->tlink);
834 rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry,
837 cifs_dbg(FYI, "fce error %d\n", rc);
839 } else if (current_entry != NULL) {
840 cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
842 cifs_dbg(FYI, "could not find entry\n");
845 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
846 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
847 max_len = tcon->ses->server->ops->calc_smb_size(
848 cifsFile->srch_inf.ntwrk_buf_start);
849 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
851 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
852 if (tmp_buf == NULL) {
857 for (i = 0; i < num_to_fill; i++) {
858 if (current_entry == NULL) {
859 /* evaluate whether this case is an error */
860 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
865 * if buggy server returns . and .. late do we want to
866 * check for that here?
869 rc = cifs_filldir(current_entry, file, ctx,
879 cifsFile->srch_inf.index_of_last_entry) {
880 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
882 cifs_save_resume_key(current_entry, cifsFile);
886 nxt_dir_entry(current_entry, end_of_smb,
887 cifsFile->srch_inf.info_level);