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)))
90 inode = dentry->d_inode;
93 * If we're generating inode numbers, then we don't
94 * want to clobber the existing one with the one that
95 * the readdir code created.
97 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
98 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
100 /* update inode in place if i_ino didn't change */
101 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
102 cifs_fattr_to_inode(inode, fattr);
106 d_invalidate(dentry);
111 * If we know that the inode will need to be revalidated immediately,
112 * then don't create a new dentry for it. We'll end up doing an on
113 * the wire call either way and this spares us an invalidation.
115 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
118 dentry = d_alloc(parent, name);
122 inode = cifs_iget(sb, fattr);
126 alias = d_splice_alias(inode, dentry);
127 if (alias && !IS_ERR(alias))
134 cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
136 fattr->cf_uid = cifs_sb->mnt_uid;
137 fattr->cf_gid = cifs_sb->mnt_gid;
139 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
140 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
141 fattr->cf_dtype = DT_DIR;
143 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
144 fattr->cf_dtype = DT_REG;
148 * We need to revalidate it further to make a decision about whether it
149 * is a symbolic link, DFS referral or a reparse point with a direct
150 * access like junctions, deduplicated files, NFS symlinks.
152 if (fattr->cf_cifsattrs & ATTR_REPARSE)
153 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
155 /* non-unix readdir doesn't provide nlink */
156 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
158 if (fattr->cf_cifsattrs & ATTR_READONLY)
159 fattr->cf_mode &= ~S_IWUGO;
162 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
163 * mark it for revalidation so that "ls -l" will look right. It might
164 * be super-slow, but if we don't do this then the ownership of files
165 * may look wrong since the inodes may not have timed out by the time
166 * "ls" does a stat() call on them.
168 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
169 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
171 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
172 fattr->cf_cifsattrs & ATTR_SYSTEM) {
173 if (fattr->cf_eof == 0) {
174 fattr->cf_mode &= ~S_IFMT;
175 fattr->cf_mode |= S_IFIFO;
176 fattr->cf_dtype = DT_FIFO;
179 * trying to get the type and mode via SFU can be slow,
180 * so just call those regular files for now, and mark
183 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
189 cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
190 struct cifs_sb_info *cifs_sb)
192 memset(fattr, 0, sizeof(*fattr));
193 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
194 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
195 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
196 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
197 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
198 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
199 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
201 cifs_fill_common_info(fattr, cifs_sb);
205 cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
206 struct cifs_sb_info *cifs_sb)
208 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
210 memset(fattr, 0, sizeof(*fattr));
211 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
212 info->LastAccessTime, offset);
213 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
214 info->LastWriteTime, offset);
215 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
216 info->LastWriteTime, offset);
218 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
219 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
220 fattr->cf_eof = le32_to_cpu(info->DataSize);
222 cifs_fill_common_info(fattr, cifs_sb);
225 /* BB eventually need to add the following helper function to
226 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
227 we try to do FindFirst on (NTFS) directory symlinks */
229 int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
236 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
239 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
240 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
244 tmpbuffer = kmalloc(maxpath);
245 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
250 if (CIFSSMBClose(xid, ptcon, fid)) {
251 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
258 initiate_cifs_search(const unsigned int xid, struct file *file)
262 char *full_path = NULL;
263 struct cifsFileInfo *cifsFile;
264 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
265 struct tcon_link *tlink = NULL;
266 struct cifs_tcon *tcon;
267 struct TCP_Server_Info *server;
269 if (file->private_data == NULL) {
270 tlink = cifs_sb_tlink(cifs_sb);
272 return PTR_ERR(tlink);
274 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
275 if (cifsFile == NULL) {
279 file->private_data = cifsFile;
280 cifsFile->tlink = cifs_get_tlink(tlink);
281 tcon = tlink_tcon(tlink);
283 cifsFile = file->private_data;
284 tcon = tlink_tcon(cifsFile->tlink);
287 server = tcon->ses->server;
289 if (!server->ops->query_dir_first) {
294 cifsFile->invalidHandle = true;
295 cifsFile->srch_inf.endOfSearch = false;
297 full_path = build_path_from_dentry(file->f_path.dentry);
298 if (full_path == NULL) {
303 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
306 /* test for Unix extensions */
307 /* but now check for them on the share/mount not on the SMB session */
308 /* if (cap_unix(tcon->ses) { */
310 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
311 else if ((tcon->ses->capabilities &
312 tcon->ses->server->vals->cap_nt_find) == 0) {
313 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
314 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
315 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
316 } else /* not srvinos - BB fixme add check for backlevel? */ {
317 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
320 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
321 if (backup_cred(cifs_sb))
322 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
324 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
325 &cifsFile->fid, search_flags,
326 &cifsFile->srch_inf);
329 cifsFile->invalidHandle = false;
330 /* BB add following call to handle readdir on new NTFS symlink errors
331 else if STATUS_STOPPED_ON_SYMLINK
332 call get_symlink_reparse_path and retry with new path */
333 else if ((rc == -EOPNOTSUPP) &&
334 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
335 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
340 cifs_put_tlink(tlink);
344 /* return length of unicode string in bytes */
345 static int cifs_unicode_bytelen(const char *str)
348 const __le16 *ustr = (const __le16 *)str;
350 for (len = 0; len <= PATH_MAX; len++) {
354 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
358 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
361 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
363 if (level == SMB_FIND_FILE_INFO_STANDARD) {
364 FIND_FILE_STANDARD_INFO *pfData;
365 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
367 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
368 pfData->FileNameLength;
370 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
371 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
372 /* validate that new_entry is not past end of SMB */
373 if (new_entry >= end_of_smb) {
374 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
375 new_entry, end_of_smb, old_entry);
377 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
378 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
379 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
380 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
381 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
382 new_entry, end_of_smb);
396 static void cifs_fill_dirent_unix(struct cifs_dirent *de,
397 const FILE_UNIX_INFO *info, bool is_unicode)
399 de->name = &info->FileName[0];
401 de->namelen = cifs_unicode_bytelen(de->name);
403 de->namelen = strnlen(de->name, PATH_MAX);
404 de->resume_key = info->ResumeKey;
405 de->ino = le64_to_cpu(info->basic.UniqueId);
408 static void cifs_fill_dirent_dir(struct cifs_dirent *de,
409 const FILE_DIRECTORY_INFO *info)
411 de->name = &info->FileName[0];
412 de->namelen = le32_to_cpu(info->FileNameLength);
413 de->resume_key = info->FileIndex;
416 static void cifs_fill_dirent_full(struct cifs_dirent *de,
417 const FILE_FULL_DIRECTORY_INFO *info)
419 de->name = &info->FileName[0];
420 de->namelen = le32_to_cpu(info->FileNameLength);
421 de->resume_key = info->FileIndex;
424 static void cifs_fill_dirent_search(struct cifs_dirent *de,
425 const SEARCH_ID_FULL_DIR_INFO *info)
427 de->name = &info->FileName[0];
428 de->namelen = le32_to_cpu(info->FileNameLength);
429 de->resume_key = info->FileIndex;
430 de->ino = le64_to_cpu(info->UniqueId);
433 static void cifs_fill_dirent_both(struct cifs_dirent *de,
434 const FILE_BOTH_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_std(struct cifs_dirent *de,
442 const FIND_FILE_STANDARD_INFO *info)
444 de->name = &info->FileName[0];
445 /* one byte length, no endianess conversion */
446 de->namelen = info->FileNameLength;
447 de->resume_key = info->ResumeKey;
450 static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
451 u16 level, bool is_unicode)
453 memset(de, 0, sizeof(*de));
456 case SMB_FIND_FILE_UNIX:
457 cifs_fill_dirent_unix(de, info, is_unicode);
459 case SMB_FIND_FILE_DIRECTORY_INFO:
460 cifs_fill_dirent_dir(de, info);
462 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
463 cifs_fill_dirent_full(de, info);
465 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
466 cifs_fill_dirent_search(de, info);
468 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
469 cifs_fill_dirent_both(de, info);
471 case SMB_FIND_FILE_INFO_STANDARD:
472 cifs_fill_dirent_std(de, info);
475 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
482 #define UNICODE_DOT cpu_to_le16(0x2e)
484 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
485 static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
493 __le16 *ufilename = (__le16 *)de->name;
494 if (de->namelen == 2) {
496 if (ufilename[0] == UNICODE_DOT)
498 } else if (de->namelen == 4) {
500 if (ufilename[0] == UNICODE_DOT &&
501 ufilename[1] == UNICODE_DOT)
505 if (de->namelen == 1) {
506 if (de->name[0] == '.')
508 } else if (de->namelen == 2) {
509 if (de->name[0] == '.' && de->name[1] == '.')
517 /* Check if directory that we are searching has changed so we can decide
518 whether we can use the cached search results from the previous search */
519 static int is_dir_changed(struct file *file)
521 struct inode *inode = file_inode(file);
522 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
524 if (cifsInfo->time == 0)
525 return 1; /* directory was changed, perhaps due to unlink */
531 static int cifs_save_resume_key(const char *current_entry,
532 struct cifsFileInfo *file_info)
534 struct cifs_dirent de;
537 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
538 file_info->srch_inf.unicode);
540 file_info->srch_inf.presume_name = de.name;
541 file_info->srch_inf.resume_name_len = de.namelen;
542 file_info->srch_inf.resume_key = de.resume_key;
548 * Find the corresponding entry in the search. Note that the SMB server returns
549 * search entries for . and .. which complicates logic here if we choose to
550 * parse for them and we do not assume that they are located in the findfirst
551 * return buffer. We start counting in the buffer with entry 2 and increment for
552 * every entry (do not increment for . or .. entry).
555 find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
556 struct file *file, char **current_entry, int *num_to_ret)
561 loff_t first_entry_in_buffer;
562 loff_t index_to_find = pos;
563 struct cifsFileInfo *cfile = file->private_data;
564 struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
565 struct TCP_Server_Info *server = tcon->ses->server;
566 /* check if index in the buffer */
568 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
571 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
574 *current_entry = NULL;
575 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
576 cfile->srch_inf.entries_in_buffer;
579 * If first entry in buf is zero then is first buffer
580 * in search response data which means it is likely . and ..
581 * will be in this buffer, although some servers do not return
582 * . and .. for the root of a drive and for those we need
583 * to start two entries earlier.
586 dump_cifs_file_struct(file, "In fce ");
587 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
588 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
589 /* close and restart search */
590 cifs_dbg(FYI, "search backing up - close and restart search\n");
591 spin_lock(&cifs_file_list_lock);
592 if (server->ops->dir_needs_close(cfile)) {
593 cfile->invalidHandle = true;
594 spin_unlock(&cifs_file_list_lock);
595 if (server->ops->close_dir)
596 server->ops->close_dir(xid, tcon, &cfile->fid);
598 spin_unlock(&cifs_file_list_lock);
599 if (cfile->srch_inf.ntwrk_buf_start) {
600 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
601 if (cfile->srch_inf.smallBuf)
602 cifs_small_buf_release(cfile->srch_inf.
605 cifs_buf_release(cfile->srch_inf.
607 cfile->srch_inf.ntwrk_buf_start = NULL;
609 rc = initiate_cifs_search(xid, file);
611 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
615 /* FindFirst/Next set last_entry to NULL on malformed reply */
616 if (cfile->srch_inf.last_entry)
617 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
620 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
621 if (backup_cred(cifs_sb))
622 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
624 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
625 (rc == 0) && !cfile->srch_inf.endOfSearch) {
626 cifs_dbg(FYI, "calling findnext2\n");
627 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
630 /* FindFirst/Next set last_entry to NULL on malformed reply */
631 if (cfile->srch_inf.last_entry)
632 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
636 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
637 /* we found the buffer that contains the entry */
638 /* scan and find it */
641 char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
642 server->ops->calc_smb_size(
643 cfile->srch_inf.ntwrk_buf_start);
645 cur_ent = cfile->srch_inf.srch_entries_start;
646 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
647 - cfile->srch_inf.entries_in_buffer;
648 pos_in_buf = index_to_find - first_entry_in_buffer;
649 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
651 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
652 /* go entry by entry figuring out which is first */
653 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
654 cfile->srch_inf.info_level);
656 if ((cur_ent == NULL) && (i < pos_in_buf)) {
657 /* BB fixme - check if we should flag this error */
658 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
659 pos_in_buf, index_to_find, rc);
662 *current_entry = cur_ent;
664 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
668 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
669 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
672 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
677 static int cifs_filldir(char *find_entry, struct file *file,
678 struct dir_context *ctx,
679 char *scratch_buf, unsigned int max_len)
681 struct cifsFileInfo *file_info = file->private_data;
682 struct super_block *sb = file_inode(file)->i_sb;
683 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
684 struct cifs_dirent de = { NULL, };
685 struct cifs_fattr fattr;
690 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
691 file_info->srch_inf.unicode);
695 if (de.namelen > max_len) {
696 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
701 /* skip . and .. since we added them first */
702 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
705 if (file_info->srch_inf.unicode) {
706 struct nls_table *nlt = cifs_sb->local_nls;
709 map_type = cifs_remap(cifs_sb);
710 name.name = scratch_buf;
712 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
714 min_t(size_t, de.namelen,
715 (size_t)max_len), nlt, map_type);
716 name.len -= nls_nullsize(nlt);
719 name.len = de.namelen;
722 switch (file_info->srch_inf.info_level) {
723 case SMB_FIND_FILE_UNIX:
724 cifs_unix_basic_to_fattr(&fattr,
725 &((FILE_UNIX_INFO *)find_entry)->basic,
728 case SMB_FIND_FILE_INFO_STANDARD:
729 cifs_std_info_to_fattr(&fattr,
730 (FIND_FILE_STANDARD_INFO *)find_entry,
734 cifs_dir_info_to_fattr(&fattr,
735 (FILE_DIRECTORY_INFO *)find_entry,
740 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
741 fattr.cf_uniqueid = de.ino;
743 fattr.cf_uniqueid = iunique(sb, ROOT_I);
744 cifs_autodisable_serverino(cifs_sb);
747 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
748 couldbe_mf_symlink(&fattr))
750 * trying to get the type and mode can be slow,
751 * so just call those regular files for now, and mark
754 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
756 cifs_prime_dcache(file->f_dentry, &name, &fattr);
758 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
759 return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype);
763 int cifs_readdir(struct file *file, struct dir_context *ctx)
768 struct cifs_tcon *tcon;
769 struct cifsFileInfo *cifsFile = NULL;
772 char *tmp_buf = NULL;
774 unsigned int max_len;
779 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
780 * '..'. Otherwise we won't be able to notify VFS in case of failure.
782 if (file->private_data == NULL) {
783 rc = initiate_cifs_search(xid, file);
784 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
789 if (!dir_emit_dots(file, ctx))
792 /* 1) If search is active,
793 is in current search buffer?
794 if it before then restart search
795 if after then keep searching till find it */
797 if (file->private_data == NULL) {
801 cifsFile = file->private_data;
802 if (cifsFile->srch_inf.endOfSearch) {
803 if (cifsFile->srch_inf.emptyDir) {
804 cifs_dbg(FYI, "End of search, empty dir\n");
809 cifsFile->invalidHandle = true;
810 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
813 tcon = tlink_tcon(cifsFile->tlink);
814 rc = find_cifs_entry(xid, tcon, ctx->pos, file, ¤t_entry,
817 cifs_dbg(FYI, "fce error %d\n", rc);
819 } else if (current_entry != NULL) {
820 cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
822 cifs_dbg(FYI, "could not find entry\n");
825 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
826 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
827 max_len = tcon->ses->server->ops->calc_smb_size(
828 cifsFile->srch_inf.ntwrk_buf_start);
829 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
831 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
832 if (tmp_buf == NULL) {
837 for (i = 0; i < num_to_fill; i++) {
838 if (current_entry == NULL) {
839 /* evaluate whether this case is an error */
840 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
845 * if buggy server returns . and .. late do we want to
846 * check for that here?
848 rc = cifs_filldir(current_entry, file, ctx,
858 cifsFile->srch_inf.index_of_last_entry) {
859 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
861 cifs_save_resume_key(current_entry, cifsFile);
865 nxt_dir_entry(current_entry, end_of_smb,
866 cifsFile->srch_inf.info_level);