blob: 887a7e230376175f0ccffc54e99bd9f23cbc1949 [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
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * Author(s): Steve French (sfrench@us.ibm.com)
8 *
9 * This library is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU Lesser General Public License as published
11 * by the Free Software Foundation; either version 2.1 of the License, or
12 * (at your option) any later version.
13 *
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
17 * the GNU Lesser General Public License for more details.
18 *
19 * You should have received a copy of the GNU Lesser General Public License
20 * along with this library; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 */
23#include <linux/fs.h>
Dave Kleikamp273d81d2006-06-01 19:41:23 +000024#include <linux/pagemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090025#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <linux/stat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "cifspdu.h"
28#include "cifsglob.h"
29#include "cifsproto.h"
30#include "cifs_unicode.h"
31#include "cifs_debug.h"
32#include "cifs_fs_sb.h"
33#include "cifsfs.h"
34
Jeff Laytonf5884162009-04-30 07:18:00 -040035/*
36 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
37 * characters alloc more to account for such multibyte target UTF-8
38 * characters.
39 */
40#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
41
Steve French39798772006-05-31 22:40:51 +000042#ifdef CONFIG_CIFS_DEBUG2
43static void dump_cifs_file_struct(struct file *file, char *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -070044{
Steve French6dc0f872007-07-06 23:13:06 +000045 struct cifsFileInfo *cf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070046
Steve French4523cc32007-04-30 20:13:06 +000047 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070048 cf = file->private_data;
Steve French4523cc32007-04-30 20:13:06 +000049 if (cf == NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +000050 cFYI(1, "empty cifs private file data");
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 return;
52 }
Steve Frenchad7a2922008-02-07 23:25:02 +000053 if (cf->invalidHandle)
Joe Perchesb6b38f72010-04-21 03:50:45 +000054 cFYI(1, "invalid handle");
Steve Frenchad7a2922008-02-07 23:25:02 +000055 if (cf->srch_inf.endOfSearch)
Joe Perchesb6b38f72010-04-21 03:50:45 +000056 cFYI(1, "end of search");
Steve Frenchad7a2922008-02-07 23:25:02 +000057 if (cf->srch_inf.emptyDir)
Joe Perchesb6b38f72010-04-21 03:50:45 +000058 cFYI(1, "empty dir");
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 }
Steve French39798772006-05-31 22:40:51 +000060}
Steve French90c81e02008-02-12 20:32:36 +000061#else
62static inline void dump_cifs_file_struct(struct file *file, char *label)
63{
64}
Steve French39798772006-05-31 22:40:51 +000065#endif /* DEBUG2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070066
Jeff Laytoncc0bad72009-06-25 00:56:52 -040067/*
68 * Find the dentry that matches "name". If there isn't one, create one. If it's
69 * a negative dentry or the uniqueid changed, then drop it and recreate it.
70 */
71static struct dentry *
72cifs_readdir_lookup(struct dentry *parent, struct qstr *name,
73 struct cifs_fattr *fattr)
74{
75 struct dentry *dentry, *alias;
76 struct inode *inode;
77 struct super_block *sb = parent->d_inode->i_sb;
78
Joe Perchesb6b38f72010-04-21 03:50:45 +000079 cFYI(1, "For %s", name->name);
Jeff Laytoncc0bad72009-06-25 00:56:52 -040080
Jeff Layton05507fa2010-02-05 13:30:36 -050081 if (parent->d_op && parent->d_op->d_hash)
82 parent->d_op->d_hash(parent, name);
83 else
84 name->hash = full_name_hash(name->name, name->len);
85
Jeff Laytoncc0bad72009-06-25 00:56:52 -040086 dentry = d_lookup(parent, name);
87 if (dentry) {
88 /* FIXME: check for inode number changes? */
89 if (dentry->d_inode != NULL)
90 return dentry;
91 d_drop(dentry);
92 dput(dentry);
93 }
94
95 dentry = d_alloc(parent, name);
96 if (dentry == NULL)
97 return NULL;
98
99 inode = cifs_iget(sb, fattr);
100 if (!inode) {
101 dput(dentry);
102 return NULL;
103 }
104
Jeff Layton0d424ad2010-09-20 16:01:35 -0700105 if (cifs_sb_master_tcon(CIFS_SB(sb))->nocase)
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400106 dentry->d_op = &cifs_ci_dentry_ops;
107 else
108 dentry->d_op = &cifs_dentry_ops;
109
110 alias = d_materialise_unique(dentry, inode);
111 if (alias != NULL) {
112 dput(dentry);
113 if (IS_ERR(alias))
114 return NULL;
115 dentry = alias;
116 }
117
118 return dentry;
119}
120
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400121static void
122cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700123{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400124 fattr->cf_uid = cifs_sb->mnt_uid;
125 fattr->cf_gid = cifs_sb->mnt_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400127 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
128 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
129 fattr->cf_dtype = DT_DIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400131 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
132 fattr->cf_dtype = DT_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700133 }
134
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400135 if (fattr->cf_cifsattrs & ATTR_READONLY)
136 fattr->cf_mode &= ~S_IWUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400138 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
139 fattr->cf_cifsattrs & ATTR_SYSTEM) {
140 if (fattr->cf_eof == 0) {
141 fattr->cf_mode &= ~S_IFMT;
142 fattr->cf_mode |= S_IFIFO;
143 fattr->cf_dtype = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800144 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400145 /*
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400146 * trying to get the type and mode via SFU can be slow,
147 * so just call those regular files for now, and mark
148 * for reval
Jeff Layton4468eb32008-05-22 09:31:40 -0400149 */
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400150 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
Jeff Layton4468eb32008-05-22 09:31:40 -0400151 }
152 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400153}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Steve French15dd4782009-09-25 02:24:45 +0000155static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400156cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
157 struct cifs_sb_info *cifs_sb)
158{
159 memset(fattr, 0, sizeof(*fattr));
160 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
161 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
162 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
163 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
164 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
165 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700166
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400167 cifs_fill_common_info(fattr, cifs_sb);
168}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Steve French15dd4782009-09-25 02:24:45 +0000170static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400171cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
172 struct cifs_sb_info *cifs_sb)
173{
Jeff Layton0d424ad2010-09-20 16:01:35 -0700174 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400176 memset(fattr, 0, sizeof(*fattr));
177 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
178 info->LastAccessTime, offset);
179 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
180 info->LastWriteTime, offset);
181 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
182 info->LastWriteTime, offset);
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800183
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400184 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
185 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
186 fattr->cf_eof = le32_to_cpu(info->DataSize);
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000187
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400188 cifs_fill_common_info(fattr, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189}
190
Steve French0e0d2cf2009-05-01 05:27:32 +0000191/* BB eventually need to add the following helper function to
192 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
193 we try to do FindFirst on (NTFS) directory symlinks */
194/*
195int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
196 int xid)
197{
198 __u16 fid;
199 int len;
200 int oplock = 0;
201 int rc;
Jeff Laytona6e8a842010-09-20 16:01:33 -0700202 struct cifsTconInfo *ptcon = cifs_sb_tcon(cifs_sb);
Steve French0e0d2cf2009-05-01 05:27:32 +0000203 char *tmpbuffer;
204
205 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
206 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
207 cifs_sb->local_nls,
208 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
209 if (!rc) {
210 tmpbuffer = kmalloc(maxpath);
211 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
212 tmpbuffer,
213 maxpath -1,
214 fid,
215 cifs_sb->local_nls);
216 if (CIFSSMBClose(xid, ptcon, fid)) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000217 cFYI(1, "Error closing temporary reparsepoint open");
Steve French0e0d2cf2009-05-01 05:27:32 +0000218 }
219 }
220}
221 */
222
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223static int initiate_cifs_search(const int xid, struct file *file)
224{
225 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000226 char *full_path;
227 struct cifsFileInfo *cifsFile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 struct cifs_sb_info *cifs_sb;
229 struct cifsTconInfo *pTcon;
230
Jeff Laytonba00ba62010-09-20 16:01:31 -0700231 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
232 if (cifs_sb == NULL)
233 return -EINVAL;
234
235 if (file->private_data == NULL)
Steve French38702532007-07-08 15:40:40 +0000236 file->private_data =
237 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238
Steve French4523cc32007-04-30 20:13:06 +0000239 if (file->private_data == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241 cifsFile = file->private_data;
Steve French4b18f2a2008-04-29 00:06:05 +0000242 cifsFile->invalidHandle = true;
243 cifsFile->srch_inf.endOfSearch = false;
Jeff Laytona6e8a842010-09-20 16:01:33 -0700244 cifsFile->tcon = cifs_sb_tcon(cifs_sb);
Jeff Laytonba00ba62010-09-20 16:01:31 -0700245 pTcon = cifsFile->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000246 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 return -EINVAL;
248
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800249 full_path = build_path_from_dentry(file->f_path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700250
Steve Frenchad7a2922008-02-07 23:25:02 +0000251 if (full_path == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700252 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Joe Perchesb6b38f72010-04-21 03:50:45 +0000254 cFYI(1, "Full path: %s start at: %lld", full_path, file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
Steve French75cf6bd2005-04-28 22:41:04 -0700256ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000258 /* but now check for them on the share/mount not on the SMB session */
259/* if (pTcon->ses->capabilities & CAP_UNIX) { */
Steve Frenchad7a2922008-02-07 23:25:02 +0000260 if (pTcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000261 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Steve Frenchad7a2922008-02-07 23:25:02 +0000262 else if ((pTcon->ses->capabilities &
Steve French5bafd762006-06-07 00:18:43 +0000263 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
264 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
266 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
267 } else /* not srvinos - BB fixme add check for backlevel? */ {
268 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
269 }
270
Steve French38702532007-07-08 15:40:40 +0000271 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700272 &cifsFile->netfid, &cifsFile->srch_inf,
Steve French38702532007-07-08 15:40:40 +0000273 cifs_sb->mnt_cifs_flags &
Steve Frencheafe8702005-09-15 21:47:30 -0700274 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
Steve French4523cc32007-04-30 20:13:06 +0000275 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000276 cifsFile->invalidHandle = false;
Steve Frenche836f012009-05-01 16:20:35 +0000277 /* BB add following call to handle readdir on new NTFS symlink errors
Steve French0e0d2cf2009-05-01 05:27:32 +0000278 else if STATUS_STOPPED_ON_SYMLINK
279 call get_symlink_reparse_path and retry with new path */
280 else if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700281 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
282 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
283 goto ffirst_retry;
284 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 kfree(full_path);
286 return rc;
287}
288
289/* return length of unicode string in bytes */
290static int cifs_unicode_bytelen(char *str)
291{
292 int len;
Steve French63d25832007-11-05 21:46:10 +0000293 __le16 *ustr = (__le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Steve French38702532007-07-08 15:40:40 +0000295 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000296 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 return len << 1;
298 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000299 cFYI(1, "Unicode string longer than PATH_MAX found");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 return len << 1;
301}
302
Steve French5bafd762006-06-07 00:18:43 +0000303static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304{
Steve French38702532007-07-08 15:40:40 +0000305 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000306 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307
Steve French4523cc32007-04-30 20:13:06 +0000308 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000309 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000310 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
311
312 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
313 pfData->FileNameLength;
314 } else
315 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000316 cFYI(1, "new entry %p old entry %p", new_entry, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700317 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000318 if (new_entry >= end_of_smb) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000319 cERROR(1, "search entry %p began after end of SMB %p old entry %p",
320 new_entry, end_of_smb, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000322 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000323 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
324 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000325 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000326 cERROR(1, "search entry %p extends after end of SMB %p",
327 new_entry, end_of_smb);
Steve French09d1db52005-04-28 22:41:08 -0700328 return NULL;
Steve French38702532007-07-08 15:40:40 +0000329 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330 return new_entry;
331
332}
333
334#define UNICODE_DOT cpu_to_le16(0x2e)
335
336/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
337static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
338{
339 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000340 char *filename = NULL;
341 int len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342
Steve French4523cc32007-04-30 20:13:06 +0000343 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000344 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700345 filename = &pFindData->FileName[0];
Steve French4523cc32007-04-30 20:13:06 +0000346 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 len = cifs_unicode_bytelen(filename);
348 } else {
349 /* BB should we make this strnlen of PATH_MAX? */
350 len = strnlen(filename, 5);
351 }
Steve French4523cc32007-04-30 20:13:06 +0000352 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000353 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 (FILE_DIRECTORY_INFO *)current_entry;
355 filename = &pFindData->FileName[0];
356 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000357 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000358 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000359 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360 (FILE_FULL_DIRECTORY_INFO *)current_entry;
361 filename = &pFindData->FileName[0];
362 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000363 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000364 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000365 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
367 filename = &pFindData->FileName[0];
368 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000369 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000370 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000371 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
373 filename = &pFindData->FileName[0];
374 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000375 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000376 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000377 (FIND_FILE_STANDARD_INFO *)current_entry;
378 filename = &pFindData->FileName[0];
Steve French5ddaa682006-08-15 13:35:48 +0000379 len = pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700380 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000381 cFYI(1, "Unknown findfirst level %d",
382 cfile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 }
384
Steve French4523cc32007-04-30 20:13:06 +0000385 if (filename) {
386 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700387 __le16 *ufilename = (__le16 *)filename;
Steve French4523cc32007-04-30 20:13:06 +0000388 if (len == 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 /* check for . */
Steve French4523cc32007-04-30 20:13:06 +0000390 if (ufilename[0] == UNICODE_DOT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000392 } else if (len == 4) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700393 /* check for .. */
Steve French4523cc32007-04-30 20:13:06 +0000394 if ((ufilename[0] == UNICODE_DOT)
Steve French38702532007-07-08 15:40:40 +0000395 && (ufilename[1] == UNICODE_DOT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 rc = 2;
397 }
398 } else /* ASCII */ {
Steve French4523cc32007-04-30 20:13:06 +0000399 if (len == 1) {
Steve French38702532007-07-08 15:40:40 +0000400 if (filename[0] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000402 } else if (len == 2) {
Steve French790fe572007-07-07 19:25:05 +0000403 if ((filename[0] == '.') && (filename[1] == '.'))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 rc = 2;
405 }
406 }
407 }
408
409 return rc;
410}
411
Steve Frencheafe8702005-09-15 21:47:30 -0700412/* Check if directory that we are searching has changed so we can decide
413 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000414static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700415{
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000416 struct inode *inode = file->f_path.dentry->d_inode;
417 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700418
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000419 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700420 return 1; /* directory was changed, perhaps due to unlink */
421 else
422 return 0;
423
424}
425
Steve French0752f152008-10-07 20:03:33 +0000426static int cifs_save_resume_key(const char *current_entry,
427 struct cifsFileInfo *cifsFile)
428{
429 int rc = 0;
430 unsigned int len = 0;
431 __u16 level;
432 char *filename;
433
434 if ((cifsFile == NULL) || (current_entry == NULL))
435 return -EINVAL;
436
437 level = cifsFile->srch_inf.info_level;
438
439 if (level == SMB_FIND_FILE_UNIX) {
440 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
441
442 filename = &pFindData->FileName[0];
443 if (cifsFile->srch_inf.unicode) {
444 len = cifs_unicode_bytelen(filename);
445 } else {
446 /* BB should we make this strnlen of PATH_MAX? */
447 len = strnlen(filename, PATH_MAX);
448 }
449 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
450 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
451 FILE_DIRECTORY_INFO *pFindData =
452 (FILE_DIRECTORY_INFO *)current_entry;
453 filename = &pFindData->FileName[0];
454 len = le32_to_cpu(pFindData->FileNameLength);
455 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
456 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
457 FILE_FULL_DIRECTORY_INFO *pFindData =
458 (FILE_FULL_DIRECTORY_INFO *)current_entry;
459 filename = &pFindData->FileName[0];
460 len = le32_to_cpu(pFindData->FileNameLength);
461 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
462 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
463 SEARCH_ID_FULL_DIR_INFO *pFindData =
464 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
465 filename = &pFindData->FileName[0];
466 len = le32_to_cpu(pFindData->FileNameLength);
467 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
468 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
469 FILE_BOTH_DIRECTORY_INFO *pFindData =
470 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
471 filename = &pFindData->FileName[0];
472 len = le32_to_cpu(pFindData->FileNameLength);
473 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
474 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
475 FIND_FILE_STANDARD_INFO *pFindData =
476 (FIND_FILE_STANDARD_INFO *)current_entry;
477 filename = &pFindData->FileName[0];
478 /* one byte length, no name conversion */
479 len = (unsigned int)pFindData->FileNameLength;
480 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
481 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000482 cFYI(1, "Unknown findfirst level %d", level);
Steve French0752f152008-10-07 20:03:33 +0000483 return -EINVAL;
484 }
485 cifsFile->srch_inf.resume_name_len = len;
486 cifsFile->srch_inf.presume_name = filename;
487 return rc;
488}
489
Linus Torvalds1da177e2005-04-16 15:20:36 -0700490/* find the corresponding entry in the search */
491/* Note that the SMB server returns search entries for . and .. which
492 complicates logic here if we choose to parse for them and we do not
493 assume that they are located in the findfirst return buffer.*/
494/* We start counting in the buffer with entry 2 and increment for every
495 entry (do not increment for . or .. entry) */
496static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
Steve French38702532007-07-08 15:40:40 +0000497 struct file *file, char **ppCurrentEntry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498{
499 int rc = 0;
500 int pos_in_buf = 0;
501 loff_t first_entry_in_buffer;
502 loff_t index_to_find = file->f_pos;
Steve French38702532007-07-08 15:40:40 +0000503 struct cifsFileInfo *cifsFile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700504 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000505
Steve French38702532007-07-08 15:40:40 +0000506 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700507 (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000509
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 *ppCurrentEntry = NULL;
Steve French38702532007-07-08 15:40:40 +0000511 first_entry_in_buffer =
512 cifsFile->srch_inf.index_of_last_entry -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 cifsFile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000514
515 /* if first entry in buf is zero then is first buffer
516 in search response data which means it is likely . and ..
517 will be in this buffer, although some servers do not return
518 . and .. for the root of a drive and for those we need
519 to start two entries earlier */
520
Steve French39798772006-05-31 22:40:51 +0000521 dump_cifs_file_struct(file, "In fce ");
Steve French38702532007-07-08 15:40:40 +0000522 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
523 is_dir_changed(file)) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700524 (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700525 /* close and restart search */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000526 cFYI(1, "search backing up - close and restart search");
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000527 write_lock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000528 if (!cifsFile->srch_inf.endOfSearch &&
529 !cifsFile->invalidHandle) {
530 cifsFile->invalidHandle = true;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000531 write_unlock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000532 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000533 } else
534 write_unlock(&GlobalSMBSeslock);
Steve French4523cc32007-04-30 20:13:06 +0000535 if (cifsFile->srch_inf.ntwrk_buf_start) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000536 cFYI(1, "freeing SMB ff cache buf on search rewind");
Steve French4523cc32007-04-30 20:13:06 +0000537 if (cifsFile->srch_inf.smallBuf)
Steve Frenchd47d7c12006-02-28 03:45:48 +0000538 cifs_small_buf_release(cifsFile->srch_inf.
539 ntwrk_buf_start);
540 else
541 cifs_buf_release(cifsFile->srch_inf.
542 ntwrk_buf_start);
Shirish Pargaonkar76c510a2008-07-24 14:48:33 +0000543 cifsFile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 }
Steve French38702532007-07-08 15:40:40 +0000545 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000546 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000547 cFYI(1, "error %d reinitiating a search on rewind",
548 rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700549 return rc;
550 }
Jeff Laytona364bc02008-10-21 14:42:13 +0000551 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552 }
553
Steve French38702532007-07-08 15:40:40 +0000554 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
Steve French4b18f2a2008-04-29 00:06:05 +0000555 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000556 cFYI(1, "calling findnext2");
Steve French38702532007-07-08 15:40:40 +0000557 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
Steve Frenchdfb75332005-06-22 17:13:47 -0700558 &cifsFile->srch_inf);
Jeff Laytona364bc02008-10-21 14:42:13 +0000559 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Steve French4523cc32007-04-30 20:13:06 +0000560 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700561 return -ENOENT;
562 }
Steve French4523cc32007-04-30 20:13:06 +0000563 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 /* we found the buffer that contains the entry */
565 /* scan and find it */
566 int i;
Steve French38702532007-07-08 15:40:40 +0000567 char *current_entry;
568 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 smbCalcSize((struct smb_hdr *)
570 cifsFile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000571
572 current_entry = cifsFile->srch_inf.srch_entries_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700573 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
574 - cifsFile->srch_inf.entries_in_buffer;
575 pos_in_buf = index_to_find - first_entry_in_buffer;
Joe Perchesb6b38f72010-04-21 03:50:45 +0000576 cFYI(1, "found entry - pos_in_buf %d", pos_in_buf);
Steve French5bafd762006-06-07 00:18:43 +0000577
Steve Frenchad7a2922008-02-07 23:25:02 +0000578 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700579 /* go entry by entry figuring out which is first */
Steve French38702532007-07-08 15:40:40 +0000580 current_entry = nxt_dir_entry(current_entry, end_of_smb,
Steve French5bafd762006-06-07 00:18:43 +0000581 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700582 }
Steve French790fe572007-07-07 19:25:05 +0000583 if ((current_entry == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700584 /* BB fixme - check if we should flag this error */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000585 cERROR(1, "reached end of buf searching for pos in buf"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700586 " %d index to find %lld rc %d",
Joe Perchesb6b38f72010-04-21 03:50:45 +0000587 pos_in_buf, index_to_find, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700588 }
589 rc = 0;
590 *ppCurrentEntry = current_entry;
591 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000592 cFYI(1, "index not in buffer - could not findnext into it");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 return 0;
594 }
595
Steve French790fe572007-07-07 19:25:05 +0000596 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000597 cFYI(1, "can not return entries pos_in_buf beyond last");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 *num_to_ret = 0;
599 } else
600 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
602 return rc;
603}
604
605/* inode num, inode type and filename returned */
606static int cifs_get_name_from_search_buf(struct qstr *pqst,
607 char *current_entry, __u16 level, unsigned int unicode,
Jeff Layton18295792009-04-30 20:45:45 -0400608 struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700609{
610 int rc = 0;
611 unsigned int len = 0;
Steve French38702532007-07-08 15:40:40 +0000612 char *filename;
613 struct nls_table *nlt = cifs_sb->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700614
615 *pinum = 0;
616
Steve French790fe572007-07-07 19:25:05 +0000617 if (level == SMB_FIND_FILE_UNIX) {
Steve French38702532007-07-08 15:40:40 +0000618 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619
620 filename = &pFindData->FileName[0];
Steve French790fe572007-07-07 19:25:05 +0000621 if (unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 len = cifs_unicode_bytelen(filename);
623 } else {
624 /* BB should we make this strnlen of PATH_MAX? */
625 len = strnlen(filename, PATH_MAX);
626 }
627
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400628 *pinum = le64_to_cpu(pFindData->basic.UniqueId);
Steve French790fe572007-07-07 19:25:05 +0000629 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000630 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 (FILE_DIRECTORY_INFO *)current_entry;
632 filename = &pFindData->FileName[0];
633 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000634 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000635 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700636 (FILE_FULL_DIRECTORY_INFO *)current_entry;
637 filename = &pFindData->FileName[0];
638 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000639 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve French38702532007-07-08 15:40:40 +0000640 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700641 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
642 filename = &pFindData->FileName[0];
643 len = le32_to_cpu(pFindData->FileNameLength);
Steve French85a6dac2009-04-01 05:22:00 +0000644 *pinum = le64_to_cpu(pFindData->UniqueId);
Steve French790fe572007-07-07 19:25:05 +0000645 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000646 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700647 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
648 filename = &pFindData->FileName[0];
649 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000650 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000651 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000652 (FIND_FILE_STANDARD_INFO *)current_entry;
653 filename = &pFindData->FileName[0];
654 /* one byte length, no name conversion */
655 len = (unsigned int)pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700656 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000657 cFYI(1, "Unknown findfirst level %d", level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658 return -EINVAL;
659 }
Steve French5bafd762006-06-07 00:18:43 +0000660
Steve French790fe572007-07-07 19:25:05 +0000661 if (len > max_len) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000662 cERROR(1, "bad search response length %d past smb end", len);
Steve French5bafd762006-06-07 00:18:43 +0000663 return -EINVAL;
664 }
665
Steve French790fe572007-07-07 19:25:05 +0000666 if (unicode) {
Jeff Laytonf5884162009-04-30 07:18:00 -0400667 pqst->len = cifs_from_ucs2((char *) pqst->name,
668 (__le16 *) filename,
Jeff Layton18295792009-04-30 20:45:45 -0400669 UNICODE_NAME_MAX,
670 min(len, max_len), nlt,
Jeff Laytonf5884162009-04-30 07:18:00 -0400671 cifs_sb->mnt_cifs_flags &
672 CIFS_MOUNT_MAP_SPECIAL_CHR);
Jeff Laytonf12f98d2010-02-05 13:14:00 -0500673 pqst->len -= nls_nullsize(nlt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700674 } else {
675 pqst->name = filename;
676 pqst->len = len;
677 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700678 return rc;
679}
680
Jeff Layton18295792009-04-30 20:45:45 -0400681static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
682 void *direntry, char *scratch_buf, unsigned int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700683{
684 int rc = 0;
685 struct qstr qstring;
Steve French38702532007-07-08 15:40:40 +0000686 struct cifsFileInfo *pCifsF;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400687 u64 inum;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400688 ino_t ino;
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400689 struct super_block *sb;
Steve French38702532007-07-08 15:40:40 +0000690 struct cifs_sb_info *cifs_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700691 struct dentry *tmp_dentry;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400692 struct cifs_fattr fattr;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693
694 /* get filename and len into qstring */
695 /* get dentry */
696 /* decide whether to create and populate ionde */
Steve French790fe572007-07-07 19:25:05 +0000697 if ((direntry == NULL) || (file == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700698 return -EINVAL;
699
700 pCifsF = file->private_data;
Steve French50c2f752007-07-13 00:33:32 +0000701
Steve French790fe572007-07-07 19:25:05 +0000702 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 return -ENOENT;
704
Steve French38702532007-07-08 15:40:40 +0000705 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
Steve French60808232006-04-22 15:53:05 +0000706 /* skip . and .. since we added them first */
Steve French790fe572007-07-07 19:25:05 +0000707 if (rc != 0)
Steve French60808232006-04-22 15:53:05 +0000708 return 0;
709
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400710 sb = file->f_path.dentry->d_sb;
711 cifs_sb = CIFS_SB(sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700712
713 qstring.name = scratch_buf;
Steve French38702532007-07-08 15:40:40 +0000714 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715 pCifsF->srch_inf.info_level,
Steve French38702532007-07-08 15:40:40 +0000716 pCifsF->srch_inf.unicode, cifs_sb,
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400717 max_len, &inum /* returned */);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700718
Steve French790fe572007-07-07 19:25:05 +0000719 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700720 return rc;
721
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400722 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400723 cifs_unix_basic_to_fattr(&fattr,
724 &((FILE_UNIX_INFO *) pfindEntry)->basic,
725 cifs_sb);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400726 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
727 cifs_std_info_to_fattr(&fattr, (FIND_FILE_STANDARD_INFO *)
728 pfindEntry, cifs_sb);
729 else
730 cifs_dir_info_to_fattr(&fattr, (FILE_DIRECTORY_INFO *)
731 pfindEntry, cifs_sb);
Jeff Layton132ac7b2009-02-10 07:33:57 -0500732
Jeff Laytonec06aed2009-11-06 14:18:29 -0500733 if (inum && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400734 fattr.cf_uniqueid = inum;
Jeff Laytonec06aed2009-11-06 14:18:29 -0500735 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400736 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Laytonec06aed2009-11-06 14:18:29 -0500737 cifs_autodisable_serverino(cifs_sb);
738 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700739
Stefan Metzmacher1b12b9c2010-08-05 21:19:56 +0200740 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
741 CIFSCouldBeMFSymlink(&fattr))
742 /*
743 * trying to get the type and mode can be slow,
744 * so just call those regular files for now, and mark
745 * for reval
746 */
747 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
748
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400749 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
750 tmp_dentry = cifs_readdir_lookup(file->f_dentry, &qstring, &fattr);
Steve French50c2f752007-07-13 00:33:32 +0000751
Steve French38702532007-07-08 15:40:40 +0000752 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400753 ino, fattr.cf_dtype);
754
755 /*
756 * we can not return filldir errors to the caller since they are
757 * "normal" when the stat blocksize is too small - we return remapped
758 * error instead
759 *
760 * FIXME: This looks bogus. filldir returns -EOVERFLOW in the above
761 * case already. Why should we be clobbering other errors from it?
762 */
Steve French790fe572007-07-07 19:25:05 +0000763 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000764 cFYI(1, "filldir rc = %d", rc);
Steve French7ca85ba2006-10-30 21:42:57 +0000765 rc = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700766 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 dput(tmp_dentry);
768 return rc;
769}
770
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771
772int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
773{
774 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000775 int xid, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 struct cifs_sb_info *cifs_sb;
777 struct cifsTconInfo *pTcon;
778 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000779 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000781 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000782 char *end_of_smb;
Jeff Layton18295792009-04-30 20:45:45 -0400783 unsigned int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784
785 xid = GetXid();
786
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800787 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788
Linus Torvalds1da177e2005-04-16 15:20:36 -0700789 switch ((int) file->f_pos) {
790 case 0:
Steve French60808232006-04-22 15:53:05 +0000791 if (filldir(direntry, ".", 1, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800792 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000793 cERROR(1, "Filldir for current dir failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700794 rc = -ENOMEM;
795 break;
796 }
Steve French60808232006-04-22 15:53:05 +0000797 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798 case 1:
Steve French60808232006-04-22 15:53:05 +0000799 if (filldir(direntry, "..", 2, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800800 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000801 cERROR(1, "Filldir for parent dir failed");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700802 rc = -ENOMEM;
803 break;
804 }
Steve French60808232006-04-22 15:53:05 +0000805 file->f_pos++;
806 default:
Steve French38702532007-07-08 15:40:40 +0000807 /* 1) If search is active,
808 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700809 if it before then restart search
810 if after then keep searching till find it */
811
Steve French790fe572007-07-07 19:25:05 +0000812 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +0000813 rc = initiate_cifs_search(xid, file);
Joe Perchesb6b38f72010-04-21 03:50:45 +0000814 cFYI(1, "initiate cifs search rc %d", rc);
Steve French790fe572007-07-07 19:25:05 +0000815 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816 FreeXid(xid);
817 return rc;
818 }
819 }
Steve French790fe572007-07-07 19:25:05 +0000820 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700821 rc = -EINVAL;
822 FreeXid(xid);
823 return rc;
824 }
825 cifsFile = file->private_data;
826 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000827 if (cifsFile->srch_inf.emptyDir) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000828 cFYI(1, "End of search, empty dir");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829 rc = 0;
830 break;
831 }
832 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +0000833 cifsFile->invalidHandle = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000835 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700836
Jeff Laytonba00ba62010-09-20 16:01:31 -0700837 pTcon = cifsFile->tcon;
Steve French38702532007-07-08 15:40:40 +0000838 rc = find_cifs_entry(xid, pTcon, file,
839 &current_entry, &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +0000840 if (rc) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000841 cFYI(1, "fce error %d", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 goto rddir2_exit;
843 } else if (current_entry != NULL) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000844 cFYI(1, "entry %lld found", file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 } else {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000846 cFYI(1, "could not find entry");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 goto rddir2_exit;
848 }
Joe Perchesb6b38f72010-04-21 03:50:45 +0000849 cFYI(1, "loop through %d times filling dir for net buf %p",
850 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
Steve French5bafd762006-06-07 00:18:43 +0000851 max_len = smbCalcSize((struct smb_hdr *)
852 cifsFile->srch_inf.ntwrk_buf_start);
853 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
854
Jeff Laytonf5884162009-04-30 07:18:00 -0400855 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
Kulikov Vasiliyf55fdcc2010-07-16 20:15:25 +0400856 if (tmp_buf == NULL) {
857 rc = -ENOMEM;
858 break;
859 }
860
Steve French790fe572007-07-07 19:25:05 +0000861 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
862 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 /* evaluate whether this case is an error */
Joe Perchesb6b38f72010-04-21 03:50:45 +0000864 cERROR(1, "past SMB end, num to fill %d i %d",
865 num_to_fill, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700866 break;
867 }
Steve French60808232006-04-22 15:53:05 +0000868 /* if buggy server returns . and .. late do
869 we want to check for that here? */
Steve French5bafd762006-06-07 00:18:43 +0000870 rc = cifs_filldir(current_entry, file,
871 filldir, direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +0000872 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +0000873 rc = 0;
874 break;
875 }
876
Linus Torvalds1da177e2005-04-16 15:20:36 -0700877 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +0000878 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +0000879 cifsFile->srch_inf.index_of_last_entry) {
Joe Perchesb6b38f72010-04-21 03:50:45 +0000880 cFYI(1, "last entry in buf at pos %lld %s",
881 file->f_pos, tmp_buf);
Steve French790fe572007-07-07 19:25:05 +0000882 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700883 break;
Steve French790fe572007-07-07 19:25:05 +0000884 } else
885 current_entry =
Steve French5bafd762006-06-07 00:18:43 +0000886 nxt_dir_entry(current_entry, end_of_smb,
887 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700888 }
889 kfree(tmp_buf);
890 break;
891 } /* end switch */
892
893rddir2_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894 FreeXid(xid);
895 return rc;
896}