blob: 770d5a9781c1ccc0a67d033aafd66d3e4473f929 [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 Perchesf96637b2013-05-04 22:12:25 -050051 cifs_dbg(FYI, "empty cifs private file data\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -070052 return;
53 }
Steve Frenchad7a2922008-02-07 23:25:02 +000054 if (cf->invalidHandle)
Joe Perchesf96637b2013-05-04 22:12:25 -050055 cifs_dbg(FYI, "invalid handle\n");
Steve Frenchad7a2922008-02-07 23:25:02 +000056 if (cf->srch_inf.endOfSearch)
Joe Perchesf96637b2013-05-04 22:12:25 -050057 cifs_dbg(FYI, "end of search\n");
Steve Frenchad7a2922008-02-07 23:25:02 +000058 if (cf->srch_inf.emptyDir)
Joe Perchesf96637b2013-05-04 22:12:25 -050059 cifs_dbg(FYI, "empty dir\n");
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/*
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -050069 * Attempt to preload the dcache with the results from the FIND_FIRST/NEXT
70 *
Jeff Laytoncc0bad72009-06-25 00:56:52 -040071 * 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.
73 */
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -050074static void
75cifs_prime_dcache(struct dentry *parent, struct qstr *name,
Jeff Laytoncc0bad72009-06-25 00:56:52 -040076 struct cifs_fattr *fattr)
77{
78 struct dentry *dentry, *alias;
79 struct inode *inode;
80 struct super_block *sb = parent->d_inode->i_sb;
Jeff Layton2f2591a2012-12-18 06:35:10 -050081 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Jeff Laytoncc0bad72009-06-25 00:56:52 -040082
Joe Perchesf96637b2013-05-04 22:12:25 -050083 cifs_dbg(FYI, "%s: for %s\n", __func__, name->name);
Jeff Laytoncc0bad72009-06-25 00:56:52 -040084
Al Viro4f522a22013-02-11 23:20:37 -050085 dentry = d_hash_and_lookup(parent, name);
86 if (unlikely(IS_ERR(dentry)))
87 return;
Jeff Layton05507fa2010-02-05 13:30:36 -050088
Jeff Laytoncc0bad72009-06-25 00:56:52 -040089 if (dentry) {
Al Viro0903a0c2012-11-29 22:11:06 -050090 int err;
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -050091
Jeff Laytoncd600422012-07-06 07:09:42 -040092 inode = dentry->d_inode;
Jeff Layton2f2591a2012-12-18 06:35:10 -050093 if (inode) {
94 /*
95 * If we're generating inode numbers, then we don't
96 * want to clobber the existing one with the one that
97 * the readdir code created.
98 */
99 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
100 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
101
102 /* update inode in place if i_ino didn't change */
103 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
104 cifs_fattr_to_inode(inode, fattr);
105 goto out;
106 }
Jeff Laytoncd600422012-07-06 07:09:42 -0400107 }
Al Viro0903a0c2012-11-29 22:11:06 -0500108 err = d_invalidate(dentry);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400109 dput(dentry);
Al Viro0903a0c2012-11-29 22:11:06 -0500110 if (err)
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500111 return;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400112 }
113
114 dentry = d_alloc(parent, name);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500115 if (!dentry)
116 return;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400117
118 inode = cifs_iget(sb, fattr);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500119 if (!inode)
120 goto out;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400121
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400122 alias = d_materialise_unique(dentry, inode);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500123 if (alias && !IS_ERR(alias))
124 dput(alias);
125out:
126 dput(dentry);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400127}
128
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400129static void
130cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400132 fattr->cf_uid = cifs_sb->mnt_uid;
133 fattr->cf_gid = cifs_sb->mnt_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400135 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
136 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
137 fattr->cf_dtype = DT_DIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400139 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
140 fattr->cf_dtype = DT_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 }
142
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400143 if (fattr->cf_cifsattrs & ATTR_READONLY)
144 fattr->cf_mode &= ~S_IWUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Jeff Laytonccb5c002012-11-25 08:00:40 -0500146 /*
147 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
148 * mark it for revalidation so that "ls -l" will look right. It might
149 * be super-slow, but if we don't do this then the ownership of files
150 * may look wrong since the inodes may not have timed out by the time
151 * "ls" does a stat() call on them.
152 */
153 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
154 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
155
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400156 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
157 fattr->cf_cifsattrs & ATTR_SYSTEM) {
158 if (fattr->cf_eof == 0) {
159 fattr->cf_mode &= ~S_IFMT;
160 fattr->cf_mode |= S_IFIFO;
161 fattr->cf_dtype = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800162 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400163 /*
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400164 * trying to get the type and mode via SFU can be slow,
165 * so just call those regular files for now, and mark
166 * for reval
Jeff Layton4468eb32008-05-22 09:31:40 -0400167 */
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400168 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
Jeff Layton4468eb32008-05-22 09:31:40 -0400169 }
170 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400171}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172
Shirish Pargaonkarc052e2b2012-09-28 12:21:14 -0500173void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400174cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
175 struct cifs_sb_info *cifs_sb)
176{
177 memset(fattr, 0, sizeof(*fattr));
178 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
179 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
180 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
Jeff Layton20054bd2011-01-07 11:30:27 -0500181 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400182 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
183 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
184 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400186 cifs_fill_common_info(fattr, cifs_sb);
187}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188
Steve French15dd4782009-09-25 02:24:45 +0000189static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400190cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
191 struct cifs_sb_info *cifs_sb)
192{
Jeff Layton0d424ad2010-09-20 16:01:35 -0700193 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700194
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400195 memset(fattr, 0, sizeof(*fattr));
196 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
197 info->LastAccessTime, offset);
198 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
199 info->LastWriteTime, offset);
200 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
201 info->LastWriteTime, offset);
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800202
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400203 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
204 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
205 fattr->cf_eof = le32_to_cpu(info->DataSize);
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000206
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400207 cifs_fill_common_info(fattr, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700208}
209
Steve French0e0d2cf2009-05-01 05:27:32 +0000210/* BB eventually need to add the following helper function to
211 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
212 we try to do FindFirst on (NTFS) directory symlinks */
213/*
214int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400215 unsigned int xid)
Steve French0e0d2cf2009-05-01 05:27:32 +0000216{
217 __u16 fid;
218 int len;
219 int oplock = 0;
220 int rc;
Steve French96daf2b2011-05-27 04:34:02 +0000221 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
Steve French0e0d2cf2009-05-01 05:27:32 +0000222 char *tmpbuffer;
223
224 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
225 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
226 cifs_sb->local_nls,
227 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
228 if (!rc) {
229 tmpbuffer = kmalloc(maxpath);
230 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
231 tmpbuffer,
232 maxpath -1,
233 fid,
234 cifs_sb->local_nls);
235 if (CIFSSMBClose(xid, ptcon, fid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500236 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
Steve French0e0d2cf2009-05-01 05:27:32 +0000237 }
238 }
239}
240 */
241
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700242static int
243initiate_cifs_search(const unsigned int xid, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244{
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500245 __u16 search_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246 int rc = 0;
Jeff Layton7ffec372010-09-29 19:51:11 -0400247 char *full_path = NULL;
Steve French38702532007-07-08 15:40:40 +0000248 struct cifsFileInfo *cifsFile;
Jeff Layton7ffec372010-09-29 19:51:11 -0400249 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Jeff Layton59c55ba2010-11-12 06:30:29 -0500250 struct tcon_link *tlink = NULL;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400251 struct cifs_tcon *tcon;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700252 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
Jeff Layton7ffec372010-09-29 19:51:11 -0400254 if (file->private_data == NULL) {
Jeff Layton59c55ba2010-11-12 06:30:29 -0500255 tlink = cifs_sb_tlink(cifs_sb);
256 if (IS_ERR(tlink))
257 return PTR_ERR(tlink);
258
259 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
260 if (cifsFile == NULL) {
261 rc = -ENOMEM;
262 goto error_exit;
263 }
264 file->private_data = cifsFile;
265 cifsFile->tlink = cifs_get_tlink(tlink);
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400266 tcon = tlink_tcon(tlink);
Jeff Layton59c55ba2010-11-12 06:30:29 -0500267 } else {
268 cifsFile = file->private_data;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400269 tcon = tlink_tcon(cifsFile->tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400270 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700272 server = tcon->ses->server;
273
274 if (!server->ops->query_dir_first) {
275 rc = -ENOSYS;
276 goto error_exit;
277 }
278
Steve French4b18f2a2008-04-29 00:06:05 +0000279 cifsFile->invalidHandle = true;
280 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800282 full_path = build_path_from_dentry(file->f_path.dentry);
Jeff Layton7ffec372010-09-29 19:51:11 -0400283 if (full_path == NULL) {
284 rc = -ENOMEM;
285 goto error_exit;
286 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Joe Perchesf96637b2013-05-04 22:12:25 -0500288 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289
Steve French75cf6bd2005-04-28 22:41:04 -0700290ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000292 /* but now check for them on the share/mount not on the SMB session */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400293 /* if (cap_unix(tcon->ses) { */
294 if (tcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000295 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400296 else if ((tcon->ses->capabilities &
297 tcon->ses->server->vals->cap_nt_find) == 0) {
Steve French5bafd762006-06-07 00:18:43 +0000298 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700299 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
300 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
301 } else /* not srvinos - BB fixme add check for backlevel? */ {
302 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
303 }
304
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500305 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
306 if (backup_cred(cifs_sb))
307 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
308
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700309 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
310 &cifsFile->fid, search_flags,
311 &cifsFile->srch_inf);
312
Steve French4523cc32007-04-30 20:13:06 +0000313 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000314 cifsFile->invalidHandle = false;
Steve Frenche836f012009-05-01 16:20:35 +0000315 /* BB add following call to handle readdir on new NTFS symlink errors
Steve French0e0d2cf2009-05-01 05:27:32 +0000316 else if STATUS_STOPPED_ON_SYMLINK
317 call get_symlink_reparse_path and retry with new path */
318 else if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700319 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
320 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
321 goto ffirst_retry;
322 }
Jeff Layton7ffec372010-09-29 19:51:11 -0400323error_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324 kfree(full_path);
Jeff Layton7ffec372010-09-29 19:51:11 -0400325 cifs_put_tlink(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700326 return rc;
327}
328
329/* return length of unicode string in bytes */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400330static int cifs_unicode_bytelen(const char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331{
332 int len;
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400333 const __le16 *ustr = (const __le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700334
Steve French38702532007-07-08 15:40:40 +0000335 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000336 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 return len << 1;
338 }
Joe Perchesf96637b2013-05-04 22:12:25 -0500339 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 return len << 1;
341}
342
Steve French5bafd762006-06-07 00:18:43 +0000343static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344{
Steve French38702532007-07-08 15:40:40 +0000345 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000346 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347
Steve French4523cc32007-04-30 20:13:06 +0000348 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000349 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000350 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
351
352 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
353 pfData->FileNameLength;
354 } else
355 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Joe Perchesf96637b2013-05-04 22:12:25 -0500356 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000358 if (new_entry >= end_of_smb) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500359 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
360 new_entry, end_of_smb, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000362 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000363 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
364 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000365 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500366 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
367 new_entry, end_of_smb);
Steve French09d1db52005-04-28 22:41:08 -0700368 return NULL;
Steve French38702532007-07-08 15:40:40 +0000369 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 return new_entry;
371
372}
373
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400374struct cifs_dirent {
375 const char *name;
376 size_t namelen;
377 u32 resume_key;
378 u64 ino;
379};
380
381static void cifs_fill_dirent_unix(struct cifs_dirent *de,
382 const FILE_UNIX_INFO *info, bool is_unicode)
383{
384 de->name = &info->FileName[0];
385 if (is_unicode)
386 de->namelen = cifs_unicode_bytelen(de->name);
387 else
388 de->namelen = strnlen(de->name, PATH_MAX);
389 de->resume_key = info->ResumeKey;
390 de->ino = le64_to_cpu(info->basic.UniqueId);
391}
392
393static void cifs_fill_dirent_dir(struct cifs_dirent *de,
394 const FILE_DIRECTORY_INFO *info)
395{
396 de->name = &info->FileName[0];
397 de->namelen = le32_to_cpu(info->FileNameLength);
398 de->resume_key = info->FileIndex;
399}
400
401static void cifs_fill_dirent_full(struct cifs_dirent *de,
402 const FILE_FULL_DIRECTORY_INFO *info)
403{
404 de->name = &info->FileName[0];
405 de->namelen = le32_to_cpu(info->FileNameLength);
406 de->resume_key = info->FileIndex;
407}
408
409static void cifs_fill_dirent_search(struct cifs_dirent *de,
410 const SEARCH_ID_FULL_DIR_INFO *info)
411{
412 de->name = &info->FileName[0];
413 de->namelen = le32_to_cpu(info->FileNameLength);
414 de->resume_key = info->FileIndex;
415 de->ino = le64_to_cpu(info->UniqueId);
416}
417
418static void cifs_fill_dirent_both(struct cifs_dirent *de,
419 const FILE_BOTH_DIRECTORY_INFO *info)
420{
421 de->name = &info->FileName[0];
422 de->namelen = le32_to_cpu(info->FileNameLength);
423 de->resume_key = info->FileIndex;
424}
425
426static void cifs_fill_dirent_std(struct cifs_dirent *de,
427 const FIND_FILE_STANDARD_INFO *info)
428{
429 de->name = &info->FileName[0];
430 /* one byte length, no endianess conversion */
431 de->namelen = info->FileNameLength;
432 de->resume_key = info->ResumeKey;
433}
434
435static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
436 u16 level, bool is_unicode)
437{
438 memset(de, 0, sizeof(*de));
439
440 switch (level) {
441 case SMB_FIND_FILE_UNIX:
442 cifs_fill_dirent_unix(de, info, is_unicode);
443 break;
444 case SMB_FIND_FILE_DIRECTORY_INFO:
445 cifs_fill_dirent_dir(de, info);
446 break;
447 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
448 cifs_fill_dirent_full(de, info);
449 break;
450 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
451 cifs_fill_dirent_search(de, info);
452 break;
453 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
454 cifs_fill_dirent_both(de, info);
455 break;
456 case SMB_FIND_FILE_INFO_STANDARD:
457 cifs_fill_dirent_std(de, info);
458 break;
459 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500460 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400461 return -EINVAL;
462 }
463
464 return 0;
465}
466
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467#define UNICODE_DOT cpu_to_le16(0x2e)
468
469/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400470static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471{
472 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400474 if (!de->name)
475 return 0;
476
477 if (is_unicode) {
478 __le16 *ufilename = (__le16 *)de->name;
479 if (de->namelen == 2) {
480 /* check for . */
481 if (ufilename[0] == UNICODE_DOT)
482 rc = 1;
483 } else if (de->namelen == 4) {
484 /* check for .. */
485 if (ufilename[0] == UNICODE_DOT &&
486 ufilename[1] == UNICODE_DOT)
487 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488 }
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400489 } else /* ASCII */ {
490 if (de->namelen == 1) {
491 if (de->name[0] == '.')
492 rc = 1;
493 } else if (de->namelen == 2) {
494 if (de->name[0] == '.' && de->name[1] == '.')
495 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700496 }
497 }
498
499 return rc;
500}
501
Steve Frencheafe8702005-09-15 21:47:30 -0700502/* Check if directory that we are searching has changed so we can decide
503 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000504static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700505{
Al Viro496ad9a2013-01-23 17:07:38 -0500506 struct inode *inode = file_inode(file);
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000507 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700508
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000509 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700510 return 1; /* directory was changed, perhaps due to unlink */
511 else
512 return 0;
513
514}
515
Steve French0752f152008-10-07 20:03:33 +0000516static int cifs_save_resume_key(const char *current_entry,
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400517 struct cifsFileInfo *file_info)
Steve French0752f152008-10-07 20:03:33 +0000518{
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400519 struct cifs_dirent de;
520 int rc;
Steve French0752f152008-10-07 20:03:33 +0000521
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400522 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
523 file_info->srch_inf.unicode);
524 if (!rc) {
525 file_info->srch_inf.presume_name = de.name;
526 file_info->srch_inf.resume_name_len = de.namelen;
527 file_info->srch_inf.resume_key = de.resume_key;
Steve French0752f152008-10-07 20:03:33 +0000528 }
Steve French0752f152008-10-07 20:03:33 +0000529 return rc;
530}
531
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700532/*
533 * Find the corresponding entry in the search. Note that the SMB server returns
534 * search entries for . and .. which complicates logic here if we choose to
535 * parse for them and we do not assume that they are located in the findfirst
536 * return buffer. We start counting in the buffer with entry 2 and increment for
537 * every entry (do not increment for . or .. entry).
538 */
539static int
540find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon,
541 struct file *file, char **current_entry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700542{
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500543 __u16 search_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700544 int rc = 0;
545 int pos_in_buf = 0;
546 loff_t first_entry_in_buffer;
547 loff_t index_to_find = file->f_pos;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700548 struct cifsFileInfo *cfile = file->private_data;
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500549 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700550 struct TCP_Server_Info *server = tcon->ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700551 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000552
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700553 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
554 return -ENOSYS;
555
556 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000558
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700559 *current_entry = NULL;
560 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
561 cfile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000562
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700563 /*
564 * If first entry in buf is zero then is first buffer
565 * in search response data which means it is likely . and ..
566 * will be in this buffer, although some servers do not return
567 * . and .. for the root of a drive and for those we need
568 * to start two entries earlier.
569 */
Steve French60808232006-04-22 15:53:05 +0000570
Steve French39798772006-05-31 22:40:51 +0000571 dump_cifs_file_struct(file, "In fce ");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700572 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
573 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700574 /* close and restart search */
Joe Perchesf96637b2013-05-04 22:12:25 -0500575 cifs_dbg(FYI, "search backing up - close and restart search\n");
Jeff Layton44772882010-10-15 15:34:03 -0400576 spin_lock(&cifs_file_list_lock);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700577 if (!cfile->srch_inf.endOfSearch && !cfile->invalidHandle) {
578 cfile->invalidHandle = true;
Jeff Layton44772882010-10-15 15:34:03 -0400579 spin_unlock(&cifs_file_list_lock);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700580 if (server->ops->close)
581 server->ops->close(xid, tcon, &cfile->fid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000582 } else
Jeff Layton44772882010-10-15 15:34:03 -0400583 spin_unlock(&cifs_file_list_lock);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700584 if (cfile->srch_inf.ntwrk_buf_start) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500585 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700586 if (cfile->srch_inf.smallBuf)
587 cifs_small_buf_release(cfile->srch_inf.
Steve Frenchd47d7c12006-02-28 03:45:48 +0000588 ntwrk_buf_start);
589 else
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700590 cifs_buf_release(cfile->srch_inf.
Steve Frenchd47d7c12006-02-28 03:45:48 +0000591 ntwrk_buf_start);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700592 cfile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700593 }
Steve French38702532007-07-08 15:40:40 +0000594 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000595 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500596 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +0000597 rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 return rc;
599 }
Jeff Layton70236762011-12-01 20:23:34 -0500600 /* FindFirst/Next set last_entry to NULL on malformed reply */
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700601 if (cfile->srch_inf.last_entry)
602 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700603 }
604
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500605 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
606 if (backup_cred(cifs_sb))
607 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
608
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700609 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
610 (rc == 0) && !cfile->srch_inf.endOfSearch) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500611 cifs_dbg(FYI, "calling findnext2\n");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700612 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
613 search_flags,
614 &cfile->srch_inf);
Jeff Layton70236762011-12-01 20:23:34 -0500615 /* FindFirst/Next set last_entry to NULL on malformed reply */
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700616 if (cfile->srch_inf.last_entry)
617 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
Steve French4523cc32007-04-30 20:13:06 +0000618 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 return -ENOENT;
620 }
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700621 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700622 /* we found the buffer that contains the entry */
623 /* scan and find it */
624 int i;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700625 char *cur_ent;
626 char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
627 server->ops->calc_smb_size(
628 cfile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000629
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700630 cur_ent = cfile->srch_inf.srch_entries_start;
631 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
632 - cfile->srch_inf.entries_in_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700633 pos_in_buf = index_to_find - first_entry_in_buffer;
Joe Perchesf96637b2013-05-04 22:12:25 -0500634 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
Steve French5bafd762006-06-07 00:18:43 +0000635
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700636 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700637 /* go entry by entry figuring out which is first */
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700638 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
639 cfile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700640 }
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700641 if ((cur_ent == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 /* BB fixme - check if we should flag this error */
Joe Perchesf96637b2013-05-04 22:12:25 -0500643 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
644 pos_in_buf, index_to_find, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700645 }
646 rc = 0;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700647 *current_entry = cur_ent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500649 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 return 0;
651 }
652
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700653 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500654 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 *num_to_ret = 0;
656 } else
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700657 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700658
659 return rc;
660}
661
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400662static int cifs_filldir(char *find_entry, struct file *file, filldir_t filldir,
663 void *dirent, char *scratch_buf, unsigned int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700664{
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400665 struct cifsFileInfo *file_info = file->private_data;
666 struct super_block *sb = file->f_path.dentry->d_sb;
667 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400668 struct cifs_dirent de = { NULL, };
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400669 struct cifs_fattr fattr;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400670 struct qstr name;
671 int rc = 0;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400672 ino_t ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400674 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
675 file_info->srch_inf.unicode);
Steve French790fe572007-07-07 19:25:05 +0000676 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700677 return rc;
678
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400679 if (de.namelen > max_len) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500680 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
681 de.namelen);
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400682 return -EINVAL;
683 }
Jeff Layton132ac7b2009-02-10 07:33:57 -0500684
Linus Torvalds1da177e2005-04-16 15:20:36 -0700685 /* skip . and .. since we added them first */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400686 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700687 return 0;
688
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400689 if (file_info->srch_inf.unicode) {
690 struct nls_table *nlt = cifs_sb->local_nls;
691
692 name.name = scratch_buf;
693 name.len =
Steve Frenchacbbb762012-01-18 22:32:33 -0600694 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
695 UNICODE_NAME_MAX,
696 min_t(size_t, de.namelen,
697 (size_t)max_len), nlt,
698 cifs_sb->mnt_cifs_flags &
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400699 CIFS_MOUNT_MAP_SPECIAL_CHR);
700 name.len -= nls_nullsize(nlt);
701 } else {
702 name.name = de.name;
703 name.len = de.namelen;
704 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400706 switch (file_info->srch_inf.info_level) {
707 case SMB_FIND_FILE_UNIX:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700708 cifs_unix_basic_to_fattr(&fattr,
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400709 &((FILE_UNIX_INFO *)find_entry)->basic,
710 cifs_sb);
711 break;
712 case SMB_FIND_FILE_INFO_STANDARD:
713 cifs_std_info_to_fattr(&fattr,
714 (FIND_FILE_STANDARD_INFO *)find_entry,
715 cifs_sb);
716 break;
717 default:
718 cifs_dir_info_to_fattr(&fattr,
719 (FILE_DIRECTORY_INFO *)find_entry,
720 cifs_sb);
721 break;
722 }
Steve French38702532007-07-08 15:40:40 +0000723
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400724 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
725 fattr.cf_uniqueid = de.ino;
Jeff Laytonec06aed2009-11-06 14:18:29 -0500726 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400727 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Laytonec06aed2009-11-06 14:18:29 -0500728 cifs_autodisable_serverino(cifs_sb);
729 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730
Stefan Metzmacher1b12b9c2010-08-05 21:19:56 +0200731 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
732 CIFSCouldBeMFSymlink(&fattr))
733 /*
734 * trying to get the type and mode can be slow,
735 * so just call those regular files for now, and mark
736 * for reval
737 */
738 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
739
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500740 cifs_prime_dcache(file->f_dentry, &name, &fattr);
Steve French50c2f752007-07-13 00:33:32 +0000741
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500742 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400743 rc = filldir(dirent, name.name, name.len, file->f_pos, ino,
744 fattr.cf_dtype);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700745 return rc;
746}
747
Linus Torvalds1da177e2005-04-16 15:20:36 -0700748
749int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
750{
751 int rc = 0;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400752 unsigned int xid;
753 int i;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700754 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700755 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000756 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000758 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000759 char *end_of_smb;
Jeff Layton18295792009-04-30 20:45:45 -0400760 unsigned int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700761
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400762 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763
Suresh Jayaraman6221ddd2010-10-01 21:23:33 +0530764 /*
765 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
766 * '..'. Otherwise we won't be able to notify VFS in case of failure.
767 */
768 if (file->private_data == NULL) {
769 rc = initiate_cifs_search(xid, file);
Joe Perchesf96637b2013-05-04 22:12:25 -0500770 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
Suresh Jayaraman6221ddd2010-10-01 21:23:33 +0530771 if (rc)
772 goto rddir2_exit;
773 }
774
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775 switch ((int) file->f_pos) {
776 case 0:
Steve French60808232006-04-22 15:53:05 +0000777 if (filldir(direntry, ".", 1, file->f_pos,
Al Viro496ad9a2013-01-23 17:07:38 -0500778 file_inode(file)->i_ino, DT_DIR) < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500779 cifs_dbg(VFS, "Filldir for current dir failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700780 rc = -ENOMEM;
781 break;
782 }
Steve French60808232006-04-22 15:53:05 +0000783 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 case 1:
Steve French60808232006-04-22 15:53:05 +0000785 if (filldir(direntry, "..", 2, file->f_pos,
Al Virob85fd6b2011-07-17 11:19:44 -0400786 parent_ino(file->f_path.dentry), DT_DIR) < 0) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500787 cifs_dbg(VFS, "Filldir for parent dir failed\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 rc = -ENOMEM;
789 break;
790 }
Steve French60808232006-04-22 15:53:05 +0000791 file->f_pos++;
792 default:
Steve French38702532007-07-08 15:40:40 +0000793 /* 1) If search is active,
794 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 if it before then restart search
796 if after then keep searching till find it */
797
Steve French790fe572007-07-07 19:25:05 +0000798 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 rc = -EINVAL;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400800 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 return rc;
802 }
803 cifsFile = file->private_data;
804 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000805 if (cifsFile->srch_inf.emptyDir) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500806 cifs_dbg(FYI, "End of search, empty dir\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700807 rc = 0;
808 break;
809 }
810 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +0000811 cifsFile->invalidHandle = true;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700812 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +0000813 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700815 tcon = tlink_tcon(cifsFile->tlink);
816 rc = find_cifs_entry(xid, tcon, file, &current_entry,
817 &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +0000818 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500819 cifs_dbg(FYI, "fce error %d\n", rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 goto rddir2_exit;
821 } else if (current_entry != NULL) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500822 cifs_dbg(FYI, "entry %lld found\n", file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500824 cifs_dbg(FYI, "could not find entry\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700825 goto rddir2_exit;
826 }
Joe Perchesf96637b2013-05-04 22:12:25 -0500827 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
828 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700829 max_len = tcon->ses->server->ops->calc_smb_size(
Steve French5bafd762006-06-07 00:18:43 +0000830 cifsFile->srch_inf.ntwrk_buf_start);
831 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
832
Jeff Laytonf5884162009-04-30 07:18:00 -0400833 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
Kulikov Vasiliyf55fdcc2010-07-16 20:15:25 +0400834 if (tmp_buf == NULL) {
835 rc = -ENOMEM;
836 break;
837 }
838
Steve French790fe572007-07-07 19:25:05 +0000839 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
840 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 /* evaluate whether this case is an error */
Joe Perchesf96637b2013-05-04 22:12:25 -0500842 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
843 num_to_fill, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700844 break;
845 }
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700846 /*
847 * if buggy server returns . and .. late do we want to
848 * check for that here?
849 */
850 rc = cifs_filldir(current_entry, file, filldir,
851 direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +0000852 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +0000853 rc = 0;
854 break;
855 }
856
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +0000858 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +0000859 cifsFile->srch_inf.index_of_last_entry) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500860 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
861 file->f_pos, tmp_buf);
Steve French790fe572007-07-07 19:25:05 +0000862 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863 break;
Steve French790fe572007-07-07 19:25:05 +0000864 } else
865 current_entry =
Steve French5bafd762006-06-07 00:18:43 +0000866 nxt_dir_entry(current_entry, end_of_smb,
867 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868 }
869 kfree(tmp_buf);
870 break;
871 } /* end switch */
872
873rddir2_exit:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400874 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700875 return rc;
876}