blob: e2bbc683e0184a736509b7a41337b2fda401e4a3 [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
2 * fs/cifs/readdir.c
3 *
4 * Directory search handling
Steve French6dc0f872007-07-06 23:13:06 +00005 *
Steve Frenchad7a2922008-02-07 23:25:02 +00006 * Copyright (C) International Business Machines Corp., 2004, 2008
Christoph Hellwigcda0ec62011-07-16 15:24:05 -04007 * Copyright (C) Red Hat, Inc., 2011
Linus Torvalds1da177e2005-04-16 15:20:36 -07008 * Author(s): Steve French (sfrench@us.ibm.com)
9 *
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.
14 *
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.
19 *
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
23 */
24#include <linux/fs.h>
Dave Kleikamp273d81d2006-06-01 19:41:23 +000025#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090026#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include <linux/stat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "cifspdu.h"
29#include "cifsglob.h"
30#include "cifsproto.h"
31#include "cifs_unicode.h"
32#include "cifs_debug.h"
33#include "cifs_fs_sb.h"
34#include "cifsfs.h"
35
Jeff Laytonf5884162009-04-30 07:18:00 -040036/*
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
39 * characters.
40 */
41#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
42
Steve French39798772006-05-31 22:40:51 +000043#ifdef CONFIG_CIFS_DEBUG2
44static void dump_cifs_file_struct(struct file *file, char *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -070045{
Steve French6dc0f872007-07-06 23:13:06 +000046 struct cifsFileInfo *cf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
Steve French4523cc32007-04-30 20:13:06 +000048 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070049 cf = file->private_data;
Steve French4523cc32007-04-30 20:13:06 +000050 if (cf == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +000051 cFYI(1, "empty cifs private file data");
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 return;
53 }
Steve Frenchad7a2922008-02-07 23:25:02 +000054 if (cf->invalidHandle)
Joe Perchesb6b38f72010-04-21 03:50:45 +000055 cFYI(1, "invalid handle");
Steve Frenchad7a2922008-02-07 23:25:02 +000056 if (cf->srch_inf.endOfSearch)
Joe Perchesb6b38f72010-04-21 03:50:45 +000057 cFYI(1, "end of search");
Steve Frenchad7a2922008-02-07 23:25:02 +000058 if (cf->srch_inf.emptyDir)
Joe Perchesb6b38f72010-04-21 03:50:45 +000059 cFYI(1, "empty dir");
Linus Torvalds1da177e2005-04-16 15:20:36 -070060 }
Steve French39798772006-05-31 22:40:51 +000061}
Steve French90c81e02008-02-12 20:32:36 +000062#else
63static inline void dump_cifs_file_struct(struct file *file, char *label)
64{
65}
Steve French39798772006-05-31 22:40:51 +000066#endif /* DEBUG2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067
Jeff Laytoncc0bad72009-06-25 00:56:52 -040068/*
69 * Find the dentry that matches "name". If there isn't one, create one. If it's
70 * a negative dentry or the uniqueid changed, then drop it and recreate it.
71 */
72static struct dentry *
73cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
74 struct cifs_fattr *fattr)
75{
76 struct dentry *dentry, *alias;
77 struct inode *inode;
78 struct super_block *sb = parent->d_inode->i_sb;
79
Joe Perchesb6b38f72010-04-21 03:50:45 +000080 cFYI(1, "For %s", name->name);
Jeff Laytoncc0bad72009-06-25 00:56:52 -040081
Jeff Layton05507fa2010-02-05 13:30:36 -050082 if (parent->d_op && parent->d_op->d_hash)
Nick Pigginb1e6a012011-01-07 17:49:28 +110083 parent->d_op->d_hash(parent, parent->d_inode, name);
Jeff Layton05507fa2010-02-05 13:30:36 -050084 else
85 name->hash = full_name_hash(name->name, name->len);
86
Jeff Laytoncc0bad72009-06-25 00:56:52 -040087 dentry = d_lookup(parent, name);
88 if (dentry) {
89 /* FIXME: check for inode number changes? */
90 if (dentry->d_inode != NULL)
91 return dentry;
92 d_drop(dentry);
93 dput(dentry);
94 }
95
96 dentry = d_alloc(parent, name);
97 if (dentry == NULL)
98 return NULL;
99
100 inode = cifs_iget(sb, fattr);
101 if (!inode) {
102 dput(dentry);
103 return NULL;
104 }
105
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400106 alias = d_materialise_unique(dentry, inode);
107 if (alias != NULL) {
108 dput(dentry);
109 if (IS_ERR(alias))
110 return NULL;
111 dentry = alias;
112 }
113
114 return dentry;
115}
116
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400117static void
118cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400120 fattr->cf_uid = cifs_sb->mnt_uid;
121 fattr->cf_gid = cifs_sb->mnt_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400123 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
124 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
125 fattr->cf_dtype = DT_DIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400127 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
128 fattr->cf_dtype = DT_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129 }
130
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400131 if (fattr->cf_cifsattrs & ATTR_READONLY)
132 fattr->cf_mode &= ~S_IWUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400134 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
135 fattr->cf_cifsattrs & ATTR_SYSTEM) {
136 if (fattr->cf_eof == 0) {
137 fattr->cf_mode &= ~S_IFMT;
138 fattr->cf_mode |= S_IFIFO;
139 fattr->cf_dtype = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800140 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400141 /*
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400142 * trying to get the type and mode via SFU can be slow,
143 * so just call those regular files for now, and mark
144 * for reval
Jeff Layton4468eb32008-05-22 09:31:40 -0400145 */
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400146 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
Jeff Layton4468eb32008-05-22 09:31:40 -0400147 }
148 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400149}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Steve French15dd4782009-09-25 02:24:45 +0000151static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400152cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
153 struct cifs_sb_info *cifs_sb)
154{
155 memset(fattr, 0, sizeof(*fattr));
156 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
157 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
158 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
Jeff Layton20054bd2011-01-07 11:30:27 -0500159 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400160 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
161 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
162 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400164 cifs_fill_common_info(fattr, cifs_sb);
165}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Steve French15dd4782009-09-25 02:24:45 +0000167static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400168cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
169 struct cifs_sb_info *cifs_sb)
170{
Jeff Layton0d424ad2010-09-20 16:01:35 -0700171 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400173 memset(fattr, 0, sizeof(*fattr));
174 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
175 info->LastAccessTime, offset);
176 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
177 info->LastWriteTime, offset);
178 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
179 info->LastWriteTime, offset);
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800180
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400181 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
182 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
183 fattr->cf_eof = le32_to_cpu(info->DataSize);
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000184
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400185 cifs_fill_common_info(fattr, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
Steve French0e0d2cf2009-05-01 05:27:32 +0000188/* BB eventually need to add the following helper function to
189 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
190 we try to do FindFirst on (NTFS) directory symlinks */
191/*
192int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
193 int xid)
194{
195 __u16 fid;
196 int len;
197 int oplock = 0;
198 int rc;
Steve French96daf2b2011-05-27 04:34:02 +0000199 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
Steve French0e0d2cf2009-05-01 05:27:32 +0000200 char *tmpbuffer;
201
202 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
203 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
204 cifs_sb->local_nls,
205 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
206 if (!rc) {
207 tmpbuffer = kmalloc(maxpath);
208 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
209 tmpbuffer,
210 maxpath -1,
211 fid,
212 cifs_sb->local_nls);
213 if (CIFSSMBClose(xid, ptcon, fid)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000214 cFYI(1, "Error closing temporary reparsepoint open");
Steve French0e0d2cf2009-05-01 05:27:32 +0000215 }
216 }
217}
218 */
219
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220static int initiate_cifs_search(const int xid, struct file *file)
221{
222 int rc = 0;
Jeff Layton7ffec372010-09-29 19:51:11 -0400223 char *full_path = NULL;
Steve French38702532007-07-08 15:40:40 +0000224 struct cifsFileInfo *cifsFile;
Jeff Layton7ffec372010-09-29 19:51:11 -0400225 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Jeff Layton59c55ba2010-11-12 06:30:29 -0500226 struct tcon_link *tlink = NULL;
Steve French96daf2b2011-05-27 04:34:02 +0000227 struct cifs_tcon *pTcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228
Jeff Layton7ffec372010-09-29 19:51:11 -0400229 if (file->private_data == NULL) {
Jeff Layton59c55ba2010-11-12 06:30:29 -0500230 tlink = cifs_sb_tlink(cifs_sb);
231 if (IS_ERR(tlink))
232 return PTR_ERR(tlink);
233
234 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
235 if (cifsFile == NULL) {
236 rc = -ENOMEM;
237 goto error_exit;
238 }
239 file->private_data = cifsFile;
240 cifsFile->tlink = cifs_get_tlink(tlink);
241 pTcon = tlink_tcon(tlink);
242 } else {
243 cifsFile = file->private_data;
244 pTcon = tlink_tcon(cifsFile->tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400245 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
Steve French4b18f2a2008-04-29 00:06:05 +0000247 cifsFile->invalidHandle = true;
248 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800250 full_path = build_path_from_dentry(file->f_path.dentry);
Jeff Layton7ffec372010-09-29 19:51:11 -0400251 if (full_path == NULL) {
252 rc = -ENOMEM;
253 goto error_exit;
254 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Joe Perchesb6b38f72010-04-21 03:50:45 +0000256 cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
Steve French75cf6bd2005-04-28 22:41:04 -0700258ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000260 /* but now check for them on the share/mount not on the SMB session */
261/* if (pTcon->ses->capabilities & CAP_UNIX) { */
Steve Frenchad7a2922008-02-07 23:25:02 +0000262 if (pTcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000263 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Steve Frenchad7a2922008-02-07 23:25:02 +0000264 else if ((pTcon->ses->capabilities &
Steve French5bafd762006-06-07 00:18:43 +0000265 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
266 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
268 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
269 } else /* not srvinos - BB fixme add check for backlevel? */ {
270 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
271 }
272
Steve French38702532007-07-08 15:40:40 +0000273 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700274 &cifsFile->netfid, &cifsFile->srch_inf,
Steve French38702532007-07-08 15:40:40 +0000275 cifs_sb->mnt_cifs_flags &
Steve Frencheafe8702005-09-15 21:47:30 -0700276 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
Steve French4523cc32007-04-30 20:13:06 +0000277 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000278 cifsFile->invalidHandle = false;
Steve Frenche836f012009-05-01 16:20:35 +0000279 /* BB add following call to handle readdir on new NTFS symlink errors
Steve French0e0d2cf2009-05-01 05:27:32 +0000280 else if STATUS_STOPPED_ON_SYMLINK
281 call get_symlink_reparse_path and retry with new path */
282 else if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700283 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
284 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
285 goto ffirst_retry;
286 }
Jeff Layton7ffec372010-09-29 19:51:11 -0400287error_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700288 kfree(full_path);
Jeff Layton7ffec372010-09-29 19:51:11 -0400289 cifs_put_tlink(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700290 return rc;
291}
292
293/* return length of unicode string in bytes */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400294static int cifs_unicode_bytelen(const char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700295{
296 int len;
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400297 const __le16 *ustr = (const __le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298
Steve French38702532007-07-08 15:40:40 +0000299 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000300 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 return len << 1;
302 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000303 cFYI(1, "Unicode string longer than PATH_MAX found");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304 return len << 1;
305}
306
Steve French5bafd762006-06-07 00:18:43 +0000307static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Steve French38702532007-07-08 15:40:40 +0000309 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000310 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Steve French4523cc32007-04-30 20:13:06 +0000312 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000313 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000314 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
315
316 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
317 pfData->FileNameLength;
318 } else
319 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000320 cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000322 if (new_entry >= end_of_smb) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000323 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
324 new_entry, end_of_smb, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000326 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000327 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
328 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000329 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000330 cERROR(1, "search entry %p extends after end of SMB %p",
331 new_entry, end_of_smb);
Steve French09d1db52005-04-28 22:41:08 -0700332 return NULL;
Steve French38702532007-07-08 15:40:40 +0000333 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334 return new_entry;
335
336}
337
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400338struct cifs_dirent {
339 const char *name;
340 size_t namelen;
341 u32 resume_key;
342 u64 ino;
343};
344
345static void cifs_fill_dirent_unix(struct cifs_dirent *de,
346 const FILE_UNIX_INFO *info, bool is_unicode)
347{
348 de->name = &info->FileName[0];
349 if (is_unicode)
350 de->namelen = cifs_unicode_bytelen(de->name);
351 else
352 de->namelen = strnlen(de->name, PATH_MAX);
353 de->resume_key = info->ResumeKey;
354 de->ino = le64_to_cpu(info->basic.UniqueId);
355}
356
357static void cifs_fill_dirent_dir(struct cifs_dirent *de,
358 const FILE_DIRECTORY_INFO *info)
359{
360 de->name = &info->FileName[0];
361 de->namelen = le32_to_cpu(info->FileNameLength);
362 de->resume_key = info->FileIndex;
363}
364
365static void cifs_fill_dirent_full(struct cifs_dirent *de,
366 const FILE_FULL_DIRECTORY_INFO *info)
367{
368 de->name = &info->FileName[0];
369 de->namelen = le32_to_cpu(info->FileNameLength);
370 de->resume_key = info->FileIndex;
371}
372
373static void cifs_fill_dirent_search(struct cifs_dirent *de,
374 const SEARCH_ID_FULL_DIR_INFO *info)
375{
376 de->name = &info->FileName[0];
377 de->namelen = le32_to_cpu(info->FileNameLength);
378 de->resume_key = info->FileIndex;
379 de->ino = le64_to_cpu(info->UniqueId);
380}
381
382static void cifs_fill_dirent_both(struct cifs_dirent *de,
383 const FILE_BOTH_DIRECTORY_INFO *info)
384{
385 de->name = &info->FileName[0];
386 de->namelen = le32_to_cpu(info->FileNameLength);
387 de->resume_key = info->FileIndex;
388}
389
390static void cifs_fill_dirent_std(struct cifs_dirent *de,
391 const FIND_FILE_STANDARD_INFO *info)
392{
393 de->name = &info->FileName[0];
394 /* one byte length, no endianess conversion */
395 de->namelen = info->FileNameLength;
396 de->resume_key = info->ResumeKey;
397}
398
399static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
400 u16 level, bool is_unicode)
401{
402 memset(de, 0, sizeof(*de));
403
404 switch (level) {
405 case SMB_FIND_FILE_UNIX:
406 cifs_fill_dirent_unix(de, info, is_unicode);
407 break;
408 case SMB_FIND_FILE_DIRECTORY_INFO:
409 cifs_fill_dirent_dir(de, info);
410 break;
411 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
412 cifs_fill_dirent_full(de, info);
413 break;
414 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
415 cifs_fill_dirent_search(de, info);
416 break;
417 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
418 cifs_fill_dirent_both(de, info);
419 break;
420 case SMB_FIND_FILE_INFO_STANDARD:
421 cifs_fill_dirent_std(de, info);
422 break;
423 default:
424 cFYI(1, "Unknown findfirst level %d", level);
425 return -EINVAL;
426 }
427
428 return 0;
429}
430
Linus Torvalds1da177e2005-04-16 15:20:36 -0700431#define UNICODE_DOT cpu_to_le16(0x2e)
432
433/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400434static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700435{
436 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400438 if (!de->name)
439 return 0;
440
441 if (is_unicode) {
442 __le16 *ufilename = (__le16 *)de->name;
443 if (de->namelen == 2) {
444 /* check for . */
445 if (ufilename[0] == UNICODE_DOT)
446 rc = 1;
447 } else if (de->namelen == 4) {
448 /* check for .. */
449 if (ufilename[0] == UNICODE_DOT &&
450 ufilename[1] == UNICODE_DOT)
451 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 }
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400453 } else /* ASCII */ {
454 if (de->namelen == 1) {
455 if (de->name[0] == '.')
456 rc = 1;
457 } else if (de->namelen == 2) {
458 if (de->name[0] == '.' && de->name[1] == '.')
459 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 }
461 }
462
463 return rc;
464}
465
Steve Frencheafe8702005-09-15 21:47:30 -0700466/* Check if directory that we are searching has changed so we can decide
467 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000468static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700469{
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000470 struct inode *inode = file->f_path.dentry->d_inode;
471 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700472
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000473 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700474 return 1; /* directory was changed, perhaps due to unlink */
475 else
476 return 0;
477
478}
479
Steve French0752f152008-10-07 20:03:33 +0000480static int cifs_save_resume_key(const char *current_entry,
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400481 struct cifsFileInfo *file_info)
Steve French0752f152008-10-07 20:03:33 +0000482{
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400483 struct cifs_dirent de;
484 int rc;
Steve French0752f152008-10-07 20:03:33 +0000485
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400486 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
487 file_info->srch_inf.unicode);
488 if (!rc) {
489 file_info->srch_inf.presume_name = de.name;
490 file_info->srch_inf.resume_name_len = de.namelen;
491 file_info->srch_inf.resume_key = de.resume_key;
Steve French0752f152008-10-07 20:03:33 +0000492 }
Steve French0752f152008-10-07 20:03:33 +0000493 return rc;
494}
495
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496/* find the corresponding entry in the search */
497/* Note that the SMB server returns search entries for . and .. which
498 complicates logic here if we choose to parse for them and we do not
499 assume that they are located in the findfirst return buffer.*/
500/* We start counting in the buffer with entry 2 and increment for every
501 entry (do not increment for . or .. entry) */
Steve French96daf2b2011-05-27 04:34:02 +0000502static int find_cifs_entry(const int xid, struct cifs_tcon *pTcon,
Steve French38702532007-07-08 15:40:40 +0000503 struct file *file, char **ppCurrentEntry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504{
505 int rc = 0;
506 int pos_in_buf = 0;
507 loff_t first_entry_in_buffer;
508 loff_t index_to_find = file->f_pos;
Steve French38702532007-07-08 15:40:40 +0000509 struct cifsFileInfo *cifsFile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000511
Steve French38702532007-07-08 15:40:40 +0000512 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700513 (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000515
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 *ppCurrentEntry = NULL;
Steve French38702532007-07-08 15:40:40 +0000517 first_entry_in_buffer =
518 cifsFile->srch_inf.index_of_last_entry -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700519 cifsFile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000520
521 /* if first entry in buf is zero then is first buffer
522 in search response data which means it is likely . and ..
523 will be in this buffer, although some servers do not return
524 . and .. for the root of a drive and for those we need
525 to start two entries earlier */
526
Steve French39798772006-05-31 22:40:51 +0000527 dump_cifs_file_struct(file, "In fce ");
Steve French38702532007-07-08 15:40:40 +0000528 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
529 is_dir_changed(file)) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700530 (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 /* close and restart search */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000532 cFYI(1, "search backing up - close and restart search");
Jeff Layton44772882010-10-15 15:34:03 -0400533 spin_lock(&cifs_file_list_lock);
Steve French77c57ec2008-05-13 21:39:32 +0000534 if (!cifsFile->srch_inf.endOfSearch &&
535 !cifsFile->invalidHandle) {
536 cifsFile->invalidHandle = true;
Jeff Layton44772882010-10-15 15:34:03 -0400537 spin_unlock(&cifs_file_list_lock);
Steve French77c57ec2008-05-13 21:39:32 +0000538 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000539 } else
Jeff Layton44772882010-10-15 15:34:03 -0400540 spin_unlock(&cifs_file_list_lock);
Steve French4523cc32007-04-30 20:13:06 +0000541 if (cifsFile->srch_inf.ntwrk_buf_start) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000542 cFYI(1, "freeing SMB ff cache buf on search rewind");
Steve French4523cc32007-04-30 20:13:06 +0000543 if (cifsFile->srch_inf.smallBuf)
Steve Frenchd47d7c12006-02-28 03:45:48 +0000544 cifs_small_buf_release(cifsFile->srch_inf.
545 ntwrk_buf_start);
546 else
547 cifs_buf_release(cifsFile->srch_inf.
548 ntwrk_buf_start);
Shirish Pargaonkar76c510a2008-07-24 14:48:33 +0000549 cifsFile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700550 }
Steve French38702532007-07-08 15:40:40 +0000551 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000552 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000553 cFYI(1, "error %d reinitiating a search on rewind",
554 rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 return rc;
556 }
Jeff Layton70236762011-12-01 20:23:34 -0500557 /* FindFirst/Next set last_entry to NULL on malformed reply */
558 if (cifsFile->srch_inf.last_entry)
559 cifs_save_resume_key(cifsFile->srch_inf.last_entry,
560 cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 }
562
Steve French38702532007-07-08 15:40:40 +0000563 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
Steve French4b18f2a2008-04-29 00:06:05 +0000564 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000565 cFYI(1, "calling findnext2");
Steve French38702532007-07-08 15:40:40 +0000566 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
Steve Frenchdfb75332005-06-22 17:13:47 -0700567 &cifsFile->srch_inf);
Jeff Layton70236762011-12-01 20:23:34 -0500568 /* FindFirst/Next set last_entry to NULL on malformed reply */
569 if (cifsFile->srch_inf.last_entry)
570 cifs_save_resume_key(cifsFile->srch_inf.last_entry,
571 cifsFile);
Steve French4523cc32007-04-30 20:13:06 +0000572 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 return -ENOENT;
574 }
Steve French4523cc32007-04-30 20:13:06 +0000575 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700576 /* we found the buffer that contains the entry */
577 /* scan and find it */
578 int i;
Steve French38702532007-07-08 15:40:40 +0000579 char *current_entry;
580 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 smbCalcSize((struct smb_hdr *)
582 cifsFile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000583
584 current_entry = cifsFile->srch_inf.srch_entries_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700585 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
586 - cifsFile->srch_inf.entries_in_buffer;
587 pos_in_buf = index_to_find - first_entry_in_buffer;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000588 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
Steve French5bafd762006-06-07 00:18:43 +0000589
Steve Frenchad7a2922008-02-07 23:25:02 +0000590 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700591 /* go entry by entry figuring out which is first */
Steve French38702532007-07-08 15:40:40 +0000592 current_entry = nxt_dir_entry(current_entry, end_of_smb,
Steve French5bafd762006-06-07 00:18:43 +0000593 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700594 }
Steve French790fe572007-07-07 19:25:05 +0000595 if ((current_entry == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700596 /* BB fixme - check if we should flag this error */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000597 cERROR(1, "reached end of buf searching for pos in buf"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 " %d index to find %lld rc %d",
Joe Perchesb6b38f72010-04-21 03:50:45 +0000599 pos_in_buf, index_to_find, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 }
601 rc = 0;
602 *ppCurrentEntry = current_entry;
603 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000604 cFYI(1, "index not in buffer - could not findnext into it");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700605 return 0;
606 }
607
Steve French790fe572007-07-07 19:25:05 +0000608 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000609 cFYI(1, "can not return entries pos_in_buf beyond last");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 *num_to_ret = 0;
611 } else
612 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613
614 return rc;
615}
616
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400617static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
618 void *dirent, char *scratch_buf, unsigned int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619{
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400620 struct cifsFileInfo *file_info = file->private_data;
621 struct super_block *sb = file->f_path.dentry->d_sb;
622 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400623 struct cifs_dirent de = { NULL, };
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400624 struct cifs_fattr fattr;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400625 struct dentry *dentry;
626 struct qstr name;
627 int rc = 0;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400628 ino_t ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700629
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400630 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
631 file_info->srch_inf.unicode);
Steve French790fe572007-07-07 19:25:05 +0000632 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 return rc;
634
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400635 if (de.namelen > max_len) {
636 cERROR(1, "bad search response length %zd past smb end",
637 de.namelen);
638 return -EINVAL;
639 }
Jeff Layton132ac7b2009-02-10 07:33:57 -0500640
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 /* skip . and .. since we added them first */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400642 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700643 return 0;
644
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400645 if (file_info->srch_inf.unicode) {
646 struct nls_table *nlt = cifs_sb->local_nls;
647
648 name.name = scratch_buf;
649 name.len =
Steve Frenchacbbb762012-01-18 22:32:33 -0600650 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
651 UNICODE_NAME_MAX,
652 min_t(size_t, de.namelen,
653 (size_t)max_len), nlt,
654 cifs_sb->mnt_cifs_flags &
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400655 CIFS_MOUNT_MAP_SPECIAL_CHR);
656 name.len -= nls_nullsize(nlt);
657 } else {
658 name.name = de.name;
659 name.len = de.namelen;
660 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700661
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400662 switch (file_info->srch_inf.info_level) {
663 case SMB_FIND_FILE_UNIX:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664 cifs_unix_basic_to_fattr(&fattr,
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400665 &((FILE_UNIX_INFO *)find_entry)->basic,
666 cifs_sb);
667 break;
668 case SMB_FIND_FILE_INFO_STANDARD:
669 cifs_std_info_to_fattr(&fattr,
670 (FIND_FILE_STANDARD_INFO *)find_entry,
671 cifs_sb);
672 break;
673 default:
674 cifs_dir_info_to_fattr(&fattr,
675 (FILE_DIRECTORY_INFO *)find_entry,
676 cifs_sb);
677 break;
678 }
Steve French38702532007-07-08 15:40:40 +0000679
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400680 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
681 fattr.cf_uniqueid = de.ino;
Jeff Laytonec06aed2009-11-06 14:18:29 -0500682 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400683 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Laytonec06aed2009-11-06 14:18:29 -0500684 cifs_autodisable_serverino(cifs_sb);
685 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700686
Stefan Metzmacher1b12b9c2010-08-05 21:19:56 +0200687 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
688 CIFSCouldBeMFSymlink(&fattr))
689 /*
690 * trying to get the type and mode can be slow,
691 * so just call those regular files for now, and mark
692 * for reval
693 */
694 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
695
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400696 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400697 dentry = cifs_readdir_lookup(file->f_dentry, &name, &fattr);
Steve French50c2f752007-07-13 00:33:32 +0000698
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400699 rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
700 fattr.cf_dtype);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400701
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400702 dput(dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 return rc;
704}
705
Linus Torvalds1da177e2005-04-16 15:20:36 -0700706
707int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
708{
709 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000710 int xid, i;
Steve French96daf2b2011-05-27 04:34:02 +0000711 struct cifs_tcon *pTcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000713 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700714 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000715 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000716 char *end_of_smb;
Jeff Layton18295792009-04-30 20:45:45 -0400717 unsigned int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
719 xid = GetXid();
720
Suresh Jayaraman6221ddd2010-10-01 21:23:33 +0530721 /*
722 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
723 * '..'. Otherwise we won't be able to notify VFS in case of failure.
724 */
725 if (file->private_data == NULL) {
726 rc = initiate_cifs_search(xid, file);
727 cFYI(1, "initiate cifs search rc %d", rc);
728 if (rc)
729 goto rddir2_exit;
730 }
731
Linus Torvalds1da177e2005-04-16 15:20:36 -0700732 switch ((int) file->f_pos) {
733 case 0:
Steve French60808232006-04-22 15:53:05 +0000734 if (filldir(direntry, ".", 1, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800735 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000736 cERROR(1, "Filldir for current dir failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700737 rc = -ENOMEM;
738 break;
739 }
Steve French60808232006-04-22 15:53:05 +0000740 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700741 case 1:
Steve French60808232006-04-22 15:53:05 +0000742 if (filldir(direntry, "..", 2, file->f_pos,
Al Virob85fd6b2011-07-17 11:19:44 -0400743 parent_ino(file->f_path.dentry), DT_DIR) < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000744 cERROR(1, "Filldir for parent dir failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 rc = -ENOMEM;
746 break;
747 }
Steve French60808232006-04-22 15:53:05 +0000748 file->f_pos++;
749 default:
Steve French38702532007-07-08 15:40:40 +0000750 /* 1) If search is active,
751 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700752 if it before then restart search
753 if after then keep searching till find it */
754
Steve French790fe572007-07-07 19:25:05 +0000755 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700756 rc = -EINVAL;
757 FreeXid(xid);
758 return rc;
759 }
760 cifsFile = file->private_data;
761 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000762 if (cifsFile->srch_inf.emptyDir) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000763 cFYI(1, "End of search, empty dir");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 rc = 0;
765 break;
766 }
767 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +0000768 cifsFile->invalidHandle = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000770 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
Jeff Layton13cfb732010-09-29 19:51:11 -0400772 pTcon = tlink_tcon(cifsFile->tlink);
Steve French38702532007-07-08 15:40:40 +0000773 rc = find_cifs_entry(xid, pTcon, file,
774 &current_entry, &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +0000775 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000776 cFYI(1, "fce error %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 goto rddir2_exit;
778 } else if (current_entry != NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000779 cFYI(1, "entry %lld found", file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000781 cFYI(1, "could not find entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 goto rddir2_exit;
783 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000784 cFYI(1, "loop through %d times filling dir for net buf %p",
785 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
Steve French5bafd762006-06-07 00:18:43 +0000786 max_len = smbCalcSize((struct smb_hdr *)
787 cifsFile->srch_inf.ntwrk_buf_start);
788 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
789
Jeff Laytonf5884162009-04-30 07:18:00 -0400790 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
Kulikov Vasiliyf55fdcc2010-07-16 20:15:25 +0400791 if (tmp_buf == NULL) {
792 rc = -ENOMEM;
793 break;
794 }
795
Steve French790fe572007-07-07 19:25:05 +0000796 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
797 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 /* evaluate whether this case is an error */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000799 cERROR(1, "past SMB end, num to fill %d i %d",
800 num_to_fill, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 break;
802 }
Steve French60808232006-04-22 15:53:05 +0000803 /* if buggy server returns . and .. late do
804 we want to check for that here? */
Steve French5bafd762006-06-07 00:18:43 +0000805 rc = cifs_filldir(current_entry, file,
806 filldir, direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +0000807 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +0000808 rc = 0;
809 break;
810 }
811
Linus Torvalds1da177e2005-04-16 15:20:36 -0700812 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +0000813 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +0000814 cifsFile->srch_inf.index_of_last_entry) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000815 cFYI(1, "last entry in buf at pos %lld %s",
816 file->f_pos, tmp_buf);
Steve French790fe572007-07-07 19:25:05 +0000817 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700818 break;
Steve French790fe572007-07-07 19:25:05 +0000819 } else
820 current_entry =
Steve French5bafd762006-06-07 00:18:43 +0000821 nxt_dir_entry(current_entry, end_of_smb,
822 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 }
824 kfree(tmp_buf);
825 break;
826 } /* end switch */
827
828rddir2_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 FreeXid(xid);
830 return rc;
831}