blob: 8fd2a95860ba9874f1bc2d008f9272d3f5825b2a [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) {
Jeff Laytoncd600422012-07-06 07:09:42 -040090 inode = dentry->d_inode;
Jeff Layton2f2591a2012-12-18 06:35:10 -050091 if (inode) {
92 /*
93 * If we're generating inode numbers, then we don't
94 * want to clobber the existing one with the one that
95 * the readdir code created.
96 */
97 if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM))
98 fattr->cf_uniqueid = CIFS_I(inode)->uniqueid;
99
100 /* update inode in place if i_ino didn't change */
101 if (CIFS_I(inode)->uniqueid == fattr->cf_uniqueid) {
102 cifs_fattr_to_inode(inode, fattr);
103 goto out;
104 }
Jeff Laytoncd600422012-07-06 07:09:42 -0400105 }
Eric W. Biederman5542aa22014-02-13 09:46:25 -0800106 d_invalidate(dentry);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400107 dput(dentry);
108 }
109
Jeff Layton757c4f62013-08-07 10:29:08 -0400110 /*
111 * If we know that the inode will need to be revalidated immediately,
112 * then don't create a new dentry for it. We'll end up doing an on
113 * the wire call either way and this spares us an invalidation.
114 */
115 if (fattr->cf_flags & CIFS_FATTR_NEED_REVAL)
116 return;
117
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400118 dentry = d_alloc(parent, name);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500119 if (!dentry)
120 return;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400121
122 inode = cifs_iget(sb, fattr);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500123 if (!inode)
124 goto out;
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400125
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400126 alias = d_materialise_unique(dentry, inode);
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500127 if (alias && !IS_ERR(alias))
128 dput(alias);
129out:
130 dput(dentry);
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400131}
132
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400133static void
134cifs_fill_common_info(struct cifs_fattr *fattr, struct cifs_sb_info *cifs_sb)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135{
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400136 fattr->cf_uid = cifs_sb->mnt_uid;
137 fattr->cf_gid = cifs_sb->mnt_gid;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700138
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400139 if (fattr->cf_cifsattrs & ATTR_DIRECTORY) {
140 fattr->cf_mode = S_IFDIR | cifs_sb->mnt_dir_mode;
141 fattr->cf_dtype = DT_DIR;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700142 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400143 fattr->cf_mode = S_IFREG | cifs_sb->mnt_file_mode;
144 fattr->cf_dtype = DT_REG;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145 }
146
Pavel Shilovskyeb85d94b2013-10-23 17:49:47 +0400147 /*
148 * We need to revalidate it further to make a decision about whether it
149 * is a symbolic link, DFS referral or a reparse point with a direct
150 * access like junctions, deduplicated files, NFS symlinks.
151 */
152 if (fattr->cf_cifsattrs & ATTR_REPARSE)
153 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
154
Jim McDonough74d290d2013-09-21 10:36:10 -0500155 /* non-unix readdir doesn't provide nlink */
156 fattr->cf_flags |= CIFS_FATTR_UNKNOWN_NLINK;
157
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400158 if (fattr->cf_cifsattrs & ATTR_READONLY)
159 fattr->cf_mode &= ~S_IWUGO;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
Jeff Laytonccb5c002012-11-25 08:00:40 -0500161 /*
162 * We of course don't get ACL info in FIND_FIRST/NEXT results, so
163 * mark it for revalidation so that "ls -l" will look right. It might
164 * be super-slow, but if we don't do this then the ownership of files
165 * may look wrong since the inodes may not have timed out by the time
166 * "ls" does a stat() call on them.
167 */
168 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL)
169 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
170
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400171 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL &&
172 fattr->cf_cifsattrs & ATTR_SYSTEM) {
173 if (fattr->cf_eof == 0) {
174 fattr->cf_mode &= ~S_IFMT;
175 fattr->cf_mode |= S_IFIFO;
176 fattr->cf_dtype = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800177 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400178 /*
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400179 * trying to get the type and mode via SFU can be slow,
180 * so just call those regular files for now, and mark
181 * for reval
Jeff Layton4468eb32008-05-22 09:31:40 -0400182 */
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400183 fattr->cf_flags |= CIFS_FATTR_NEED_REVAL;
Jeff Layton4468eb32008-05-22 09:31:40 -0400184 }
185 }
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400186}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187
Shirish Pargaonkarc052e2b2012-09-28 12:21:14 -0500188void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400189cifs_dir_info_to_fattr(struct cifs_fattr *fattr, FILE_DIRECTORY_INFO *info,
190 struct cifs_sb_info *cifs_sb)
191{
192 memset(fattr, 0, sizeof(*fattr));
193 fattr->cf_cifsattrs = le32_to_cpu(info->ExtFileAttributes);
194 fattr->cf_eof = le64_to_cpu(info->EndOfFile);
195 fattr->cf_bytes = le64_to_cpu(info->AllocationSize);
Jeff Layton20054bd2011-01-07 11:30:27 -0500196 fattr->cf_createtime = le64_to_cpu(info->CreationTime);
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400197 fattr->cf_atime = cifs_NTtimeToUnix(info->LastAccessTime);
198 fattr->cf_ctime = cifs_NTtimeToUnix(info->ChangeTime);
199 fattr->cf_mtime = cifs_NTtimeToUnix(info->LastWriteTime);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400201 cifs_fill_common_info(fattr, cifs_sb);
202}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700203
Steve French15dd4782009-09-25 02:24:45 +0000204static void
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400205cifs_std_info_to_fattr(struct cifs_fattr *fattr, FIND_FILE_STANDARD_INFO *info,
206 struct cifs_sb_info *cifs_sb)
207{
Jeff Layton0d424ad2010-09-20 16:01:35 -0700208 int offset = cifs_sb_master_tcon(cifs_sb)->ses->server->timeAdj;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400210 memset(fattr, 0, sizeof(*fattr));
211 fattr->cf_atime = cnvrtDosUnixTm(info->LastAccessDate,
212 info->LastAccessTime, offset);
213 fattr->cf_ctime = cnvrtDosUnixTm(info->LastWriteDate,
214 info->LastWriteTime, offset);
215 fattr->cf_mtime = cnvrtDosUnixTm(info->LastWriteDate,
216 info->LastWriteTime, offset);
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800217
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400218 fattr->cf_cifsattrs = le16_to_cpu(info->Attributes);
219 fattr->cf_bytes = le32_to_cpu(info->AllocationSize);
220 fattr->cf_eof = le32_to_cpu(info->DataSize);
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000221
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400222 cifs_fill_common_info(fattr, cifs_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700223}
224
Steve French0e0d2cf2009-05-01 05:27:32 +0000225/* BB eventually need to add the following helper function to
226 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
227 we try to do FindFirst on (NTFS) directory symlinks */
228/*
229int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400230 unsigned int xid)
Steve French0e0d2cf2009-05-01 05:27:32 +0000231{
232 __u16 fid;
233 int len;
234 int oplock = 0;
235 int rc;
Steve French96daf2b2011-05-27 04:34:02 +0000236 struct cifs_tcon *ptcon = cifs_sb_tcon(cifs_sb);
Steve French0e0d2cf2009-05-01 05:27:32 +0000237 char *tmpbuffer;
238
239 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
240 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
241 cifs_sb->local_nls,
Steve French2baa2682014-09-27 02:19:01 -0500242 cifs_remap(cifs_sb);
Steve French0e0d2cf2009-05-01 05:27:32 +0000243 if (!rc) {
244 tmpbuffer = kmalloc(maxpath);
245 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
246 tmpbuffer,
247 maxpath -1,
248 fid,
249 cifs_sb->local_nls);
250 if (CIFSSMBClose(xid, ptcon, fid)) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500251 cifs_dbg(FYI, "Error closing temporary reparsepoint open\n");
Steve French0e0d2cf2009-05-01 05:27:32 +0000252 }
253 }
254}
255 */
256
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700257static int
258initiate_cifs_search(const unsigned int xid, struct file *file)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259{
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500260 __u16 search_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 int rc = 0;
Jeff Layton7ffec372010-09-29 19:51:11 -0400262 char *full_path = NULL;
Steve French38702532007-07-08 15:40:40 +0000263 struct cifsFileInfo *cifsFile;
Jeff Layton7ffec372010-09-29 19:51:11 -0400264 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Jeff Layton59c55ba2010-11-12 06:30:29 -0500265 struct tcon_link *tlink = NULL;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400266 struct cifs_tcon *tcon;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700267 struct TCP_Server_Info *server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268
Jeff Layton7ffec372010-09-29 19:51:11 -0400269 if (file->private_data == NULL) {
Jeff Layton59c55ba2010-11-12 06:30:29 -0500270 tlink = cifs_sb_tlink(cifs_sb);
271 if (IS_ERR(tlink))
272 return PTR_ERR(tlink);
273
274 cifsFile = kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
275 if (cifsFile == NULL) {
276 rc = -ENOMEM;
277 goto error_exit;
278 }
279 file->private_data = cifsFile;
280 cifsFile->tlink = cifs_get_tlink(tlink);
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400281 tcon = tlink_tcon(tlink);
Jeff Layton59c55ba2010-11-12 06:30:29 -0500282 } else {
283 cifsFile = file->private_data;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400284 tcon = tlink_tcon(cifsFile->tlink);
Jeff Layton7ffec372010-09-29 19:51:11 -0400285 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700287 server = tcon->ses->server;
288
289 if (!server->ops->query_dir_first) {
290 rc = -ENOSYS;
291 goto error_exit;
292 }
293
Steve French4b18f2a2008-04-29 00:06:05 +0000294 cifsFile->invalidHandle = true;
295 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800297 full_path = build_path_from_dentry(file->f_path.dentry);
Jeff Layton7ffec372010-09-29 19:51:11 -0400298 if (full_path == NULL) {
299 rc = -ENOMEM;
300 goto error_exit;
301 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302
Joe Perchesf96637b2013-05-04 22:12:25 -0500303 cifs_dbg(FYI, "Full path: %s start at: %lld\n", full_path, file->f_pos);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700304
Steve French75cf6bd2005-04-28 22:41:04 -0700305ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000307 /* but now check for them on the share/mount not on the SMB session */
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400308 /* if (cap_unix(tcon->ses) { */
309 if (tcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000310 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Pavel Shilovsky29e20f92012-07-13 13:58:14 +0400311 else if ((tcon->ses->capabilities &
312 tcon->ses->server->vals->cap_nt_find) == 0) {
Steve French5bafd762006-06-07 00:18:43 +0000313 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
315 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
316 } else /* not srvinos - BB fixme add check for backlevel? */ {
317 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
318 }
319
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500320 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
321 if (backup_cred(cifs_sb))
322 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
323
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700324 rc = server->ops->query_dir_first(xid, tcon, full_path, cifs_sb,
325 &cifsFile->fid, search_flags,
326 &cifsFile->srch_inf);
327
Steve French4523cc32007-04-30 20:13:06 +0000328 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000329 cifsFile->invalidHandle = false;
Steve Frenche836f012009-05-01 16:20:35 +0000330 /* BB add following call to handle readdir on new NTFS symlink errors
Steve French0e0d2cf2009-05-01 05:27:32 +0000331 else if STATUS_STOPPED_ON_SYMLINK
332 call get_symlink_reparse_path and retry with new path */
333 else if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700334 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
335 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
336 goto ffirst_retry;
337 }
Jeff Layton7ffec372010-09-29 19:51:11 -0400338error_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 kfree(full_path);
Jeff Layton7ffec372010-09-29 19:51:11 -0400340 cifs_put_tlink(tlink);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return rc;
342}
343
344/* return length of unicode string in bytes */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400345static int cifs_unicode_bytelen(const char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346{
347 int len;
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400348 const __le16 *ustr = (const __le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349
Steve French38702532007-07-08 15:40:40 +0000350 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000351 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352 return len << 1;
353 }
Joe Perchesf96637b2013-05-04 22:12:25 -0500354 cifs_dbg(FYI, "Unicode string longer than PATH_MAX found\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 return len << 1;
356}
357
Steve French5bafd762006-06-07 00:18:43 +0000358static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359{
Steve French38702532007-07-08 15:40:40 +0000360 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000361 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700362
Steve French4523cc32007-04-30 20:13:06 +0000363 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000364 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000365 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
366
367 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
368 pfData->FileNameLength;
369 } else
370 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Joe Perchesf96637b2013-05-04 22:12:25 -0500371 cifs_dbg(FYI, "new entry %p old entry %p\n", new_entry, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000373 if (new_entry >= end_of_smb) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500374 cifs_dbg(VFS, "search entry %p began after end of SMB %p old entry %p\n",
375 new_entry, end_of_smb, old_entry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000377 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000378 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
379 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000380 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500381 cifs_dbg(VFS, "search entry %p extends after end of SMB %p\n",
382 new_entry, end_of_smb);
Steve French09d1db52005-04-28 22:41:08 -0700383 return NULL;
Steve French38702532007-07-08 15:40:40 +0000384 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385 return new_entry;
386
387}
388
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400389struct cifs_dirent {
390 const char *name;
391 size_t namelen;
392 u32 resume_key;
393 u64 ino;
394};
395
396static void cifs_fill_dirent_unix(struct cifs_dirent *de,
397 const FILE_UNIX_INFO *info, bool is_unicode)
398{
399 de->name = &info->FileName[0];
400 if (is_unicode)
401 de->namelen = cifs_unicode_bytelen(de->name);
402 else
403 de->namelen = strnlen(de->name, PATH_MAX);
404 de->resume_key = info->ResumeKey;
405 de->ino = le64_to_cpu(info->basic.UniqueId);
406}
407
408static void cifs_fill_dirent_dir(struct cifs_dirent *de,
409 const FILE_DIRECTORY_INFO *info)
410{
411 de->name = &info->FileName[0];
412 de->namelen = le32_to_cpu(info->FileNameLength);
413 de->resume_key = info->FileIndex;
414}
415
416static void cifs_fill_dirent_full(struct cifs_dirent *de,
417 const FILE_FULL_DIRECTORY_INFO *info)
418{
419 de->name = &info->FileName[0];
420 de->namelen = le32_to_cpu(info->FileNameLength);
421 de->resume_key = info->FileIndex;
422}
423
424static void cifs_fill_dirent_search(struct cifs_dirent *de,
425 const SEARCH_ID_FULL_DIR_INFO *info)
426{
427 de->name = &info->FileName[0];
428 de->namelen = le32_to_cpu(info->FileNameLength);
429 de->resume_key = info->FileIndex;
430 de->ino = le64_to_cpu(info->UniqueId);
431}
432
433static void cifs_fill_dirent_both(struct cifs_dirent *de,
434 const FILE_BOTH_DIRECTORY_INFO *info)
435{
436 de->name = &info->FileName[0];
437 de->namelen = le32_to_cpu(info->FileNameLength);
438 de->resume_key = info->FileIndex;
439}
440
441static void cifs_fill_dirent_std(struct cifs_dirent *de,
442 const FIND_FILE_STANDARD_INFO *info)
443{
444 de->name = &info->FileName[0];
445 /* one byte length, no endianess conversion */
446 de->namelen = info->FileNameLength;
447 de->resume_key = info->ResumeKey;
448}
449
450static int cifs_fill_dirent(struct cifs_dirent *de, const void *info,
451 u16 level, bool is_unicode)
452{
453 memset(de, 0, sizeof(*de));
454
455 switch (level) {
456 case SMB_FIND_FILE_UNIX:
457 cifs_fill_dirent_unix(de, info, is_unicode);
458 break;
459 case SMB_FIND_FILE_DIRECTORY_INFO:
460 cifs_fill_dirent_dir(de, info);
461 break;
462 case SMB_FIND_FILE_FULL_DIRECTORY_INFO:
463 cifs_fill_dirent_full(de, info);
464 break;
465 case SMB_FIND_FILE_ID_FULL_DIR_INFO:
466 cifs_fill_dirent_search(de, info);
467 break;
468 case SMB_FIND_FILE_BOTH_DIRECTORY_INFO:
469 cifs_fill_dirent_both(de, info);
470 break;
471 case SMB_FIND_FILE_INFO_STANDARD:
472 cifs_fill_dirent_std(de, info);
473 break;
474 default:
Joe Perchesf96637b2013-05-04 22:12:25 -0500475 cifs_dbg(FYI, "Unknown findfirst level %d\n", level);
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400476 return -EINVAL;
477 }
478
479 return 0;
480}
481
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482#define UNICODE_DOT cpu_to_le16(0x2e)
483
484/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400485static int cifs_entry_is_dot(struct cifs_dirent *de, bool is_unicode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700486{
487 int rc = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700488
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400489 if (!de->name)
490 return 0;
491
492 if (is_unicode) {
493 __le16 *ufilename = (__le16 *)de->name;
494 if (de->namelen == 2) {
495 /* check for . */
496 if (ufilename[0] == UNICODE_DOT)
497 rc = 1;
498 } else if (de->namelen == 4) {
499 /* check for .. */
500 if (ufilename[0] == UNICODE_DOT &&
501 ufilename[1] == UNICODE_DOT)
502 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700503 }
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400504 } else /* ASCII */ {
505 if (de->namelen == 1) {
506 if (de->name[0] == '.')
507 rc = 1;
508 } else if (de->namelen == 2) {
509 if (de->name[0] == '.' && de->name[1] == '.')
510 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 }
512 }
513
514 return rc;
515}
516
Steve Frencheafe8702005-09-15 21:47:30 -0700517/* Check if directory that we are searching has changed so we can decide
518 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000519static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700520{
Al Viro496ad9a2013-01-23 17:07:38 -0500521 struct inode *inode = file_inode(file);
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000522 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700523
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000524 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700525 return 1; /* directory was changed, perhaps due to unlink */
526 else
527 return 0;
528
529}
530
Steve French0752f152008-10-07 20:03:33 +0000531static int cifs_save_resume_key(const char *current_entry,
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400532 struct cifsFileInfo *file_info)
Steve French0752f152008-10-07 20:03:33 +0000533{
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400534 struct cifs_dirent de;
535 int rc;
Steve French0752f152008-10-07 20:03:33 +0000536
Christoph Hellwigeaf35b12011-07-16 15:24:37 -0400537 rc = cifs_fill_dirent(&de, current_entry, file_info->srch_inf.info_level,
538 file_info->srch_inf.unicode);
539 if (!rc) {
540 file_info->srch_inf.presume_name = de.name;
541 file_info->srch_inf.resume_name_len = de.namelen;
542 file_info->srch_inf.resume_key = de.resume_key;
Steve French0752f152008-10-07 20:03:33 +0000543 }
Steve French0752f152008-10-07 20:03:33 +0000544 return rc;
545}
546
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700547/*
548 * Find the corresponding entry in the search. Note that the SMB server returns
549 * search entries for . and .. which complicates logic here if we choose to
550 * parse for them and we do not assume that they are located in the findfirst
551 * return buffer. We start counting in the buffer with entry 2 and increment for
552 * every entry (do not increment for . or .. entry).
553 */
554static int
Al Virobe4ccdc2013-05-22 16:17:25 -0400555find_cifs_entry(const unsigned int xid, struct cifs_tcon *tcon, loff_t pos,
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700556 struct file *file, char **current_entry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557{
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500558 __u16 search_flags;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559 int rc = 0;
560 int pos_in_buf = 0;
561 loff_t first_entry_in_buffer;
Al Virobe4ccdc2013-05-22 16:17:25 -0400562 loff_t index_to_find = pos;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700563 struct cifsFileInfo *cfile = file->private_data;
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500564 struct cifs_sb_info *cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700565 struct TCP_Server_Info *server = tcon->ses->server;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700566 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000567
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700568 if (!server->ops->query_dir_first || !server->ops->query_dir_next)
569 return -ENOSYS;
570
571 if ((cfile == NULL) || (current_entry == NULL) || (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700572 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000573
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700574 *current_entry = NULL;
575 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry -
576 cfile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000577
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700578 /*
579 * If first entry in buf is zero then is first buffer
580 * in search response data which means it is likely . and ..
581 * will be in this buffer, although some servers do not return
582 * . and .. for the root of a drive and for those we need
583 * to start two entries earlier.
584 */
Steve French60808232006-04-22 15:53:05 +0000585
Steve French39798772006-05-31 22:40:51 +0000586 dump_cifs_file_struct(file, "In fce ");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700587 if (((index_to_find < cfile->srch_inf.index_of_last_entry) &&
588 is_dir_changed(file)) || (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 /* close and restart search */
Joe Perchesf96637b2013-05-04 22:12:25 -0500590 cifs_dbg(FYI, "search backing up - close and restart search\n");
Jeff Layton44772882010-10-15 15:34:03 -0400591 spin_lock(&cifs_file_list_lock);
Pavel Shilovsky52755802014-08-18 20:49:57 +0400592 if (server->ops->dir_needs_close(cfile)) {
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700593 cfile->invalidHandle = true;
Jeff Layton44772882010-10-15 15:34:03 -0400594 spin_unlock(&cifs_file_list_lock);
Pavel Shilovskyf7369062014-08-26 19:04:44 +0400595 if (server->ops->close_dir)
596 server->ops->close_dir(xid, tcon, &cfile->fid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000597 } else
Jeff Layton44772882010-10-15 15:34:03 -0400598 spin_unlock(&cifs_file_list_lock);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700599 if (cfile->srch_inf.ntwrk_buf_start) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500600 cifs_dbg(FYI, "freeing SMB ff cache buf on search rewind\n");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700601 if (cfile->srch_inf.smallBuf)
602 cifs_small_buf_release(cfile->srch_inf.
Steve Frenchd47d7c12006-02-28 03:45:48 +0000603 ntwrk_buf_start);
604 else
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700605 cifs_buf_release(cfile->srch_inf.
Steve Frenchd47d7c12006-02-28 03:45:48 +0000606 ntwrk_buf_start);
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700607 cfile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 }
Steve French38702532007-07-08 15:40:40 +0000609 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000610 if (rc) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500611 cifs_dbg(FYI, "error %d reinitiating a search on rewind\n",
Joe Perchesb6b38f72010-04-21 03:50:45 +0000612 rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 return rc;
614 }
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);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 }
619
Shirish Pargaonkar2608bee2012-05-15 10:19:16 -0500620 search_flags = CIFS_SEARCH_CLOSE_AT_END | CIFS_SEARCH_RETURN_RESUME;
621 if (backup_cred(cifs_sb))
622 search_flags |= CIFS_SEARCH_BACKUP_SEARCH;
623
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700624 while ((index_to_find >= cfile->srch_inf.index_of_last_entry) &&
625 (rc == 0) && !cfile->srch_inf.endOfSearch) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500626 cifs_dbg(FYI, "calling findnext2\n");
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700627 rc = server->ops->query_dir_next(xid, tcon, &cfile->fid,
628 search_flags,
629 &cfile->srch_inf);
Jeff Layton70236762011-12-01 20:23:34 -0500630 /* FindFirst/Next set last_entry to NULL on malformed reply */
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700631 if (cfile->srch_inf.last_entry)
632 cifs_save_resume_key(cfile->srch_inf.last_entry, cfile);
Steve French4523cc32007-04-30 20:13:06 +0000633 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700634 return -ENOENT;
635 }
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700636 if (index_to_find < cfile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700637 /* we found the buffer that contains the entry */
638 /* scan and find it */
639 int i;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700640 char *cur_ent;
641 char *end_of_smb = cfile->srch_inf.ntwrk_buf_start +
642 server->ops->calc_smb_size(
643 cfile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000644
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700645 cur_ent = cfile->srch_inf.srch_entries_start;
646 first_entry_in_buffer = cfile->srch_inf.index_of_last_entry
647 - cfile->srch_inf.entries_in_buffer;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 pos_in_buf = index_to_find - first_entry_in_buffer;
Joe Perchesf96637b2013-05-04 22:12:25 -0500649 cifs_dbg(FYI, "found entry - pos_in_buf %d\n", pos_in_buf);
Steve French5bafd762006-06-07 00:18:43 +0000650
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700651 for (i = 0; (i < (pos_in_buf)) && (cur_ent != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700652 /* go entry by entry figuring out which is first */
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700653 cur_ent = nxt_dir_entry(cur_ent, end_of_smb,
654 cfile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 }
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700656 if ((cur_ent == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700657 /* BB fixme - check if we should flag this error */
Joe Perchesf96637b2013-05-04 22:12:25 -0500658 cifs_dbg(VFS, "reached end of buf searching for pos in buf %d index to find %lld rc %d\n",
659 pos_in_buf, index_to_find, rc);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 }
661 rc = 0;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700662 *current_entry = cur_ent;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 } else {
Joe Perchesf96637b2013-05-04 22:12:25 -0500664 cifs_dbg(FYI, "index not in buffer - could not findnext into it\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700665 return 0;
666 }
667
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700668 if (pos_in_buf >= cfile->srch_inf.entries_in_buffer) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500669 cifs_dbg(FYI, "can not return entries pos_in_buf beyond last\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700670 *num_to_ret = 0;
671 } else
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700672 *num_to_ret = cfile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700673
674 return rc;
675}
676
Al Virobe4ccdc2013-05-22 16:17:25 -0400677static int cifs_filldir(char *find_entry, struct file *file,
678 struct dir_context *ctx,
679 char *scratch_buf, unsigned int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700680{
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400681 struct cifsFileInfo *file_info = file->private_data;
682 struct super_block *sb = file->f_path.dentry->d_sb;
683 struct cifs_sb_info *cifs_sb = CIFS_SB(sb);
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400684 struct cifs_dirent de = { NULL, };
Jeff Laytoncc0bad72009-06-25 00:56:52 -0400685 struct cifs_fattr fattr;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400686 struct qstr name;
687 int rc = 0;
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400688 ino_t ino;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700689
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400690 rc = cifs_fill_dirent(&de, find_entry, file_info->srch_inf.info_level,
691 file_info->srch_inf.unicode);
Steve French790fe572007-07-07 19:25:05 +0000692 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700693 return rc;
694
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400695 if (de.namelen > max_len) {
Joe Perchesf96637b2013-05-04 22:12:25 -0500696 cifs_dbg(VFS, "bad search response length %zd past smb end\n",
697 de.namelen);
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400698 return -EINVAL;
699 }
Jeff Layton132ac7b2009-02-10 07:33:57 -0500700
Linus Torvalds1da177e2005-04-16 15:20:36 -0700701 /* skip . and .. since we added them first */
Christoph Hellwigcda0ec62011-07-16 15:24:05 -0400702 if (cifs_entry_is_dot(&de, file_info->srch_inf.unicode))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700703 return 0;
704
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400705 if (file_info->srch_inf.unicode) {
706 struct nls_table *nlt = cifs_sb->local_nls;
Steve Frenchb6938552014-09-25 13:20:05 -0500707 int map_type;
708
Steve French2baa2682014-09-27 02:19:01 -0500709 map_type = cifs_remap(cifs_sb);
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400710 name.name = scratch_buf;
711 name.len =
Steve Frenchacbbb762012-01-18 22:32:33 -0600712 cifs_from_utf16((char *)name.name, (__le16 *)de.name,
713 UNICODE_NAME_MAX,
714 min_t(size_t, de.namelen,
Steve Frenchb6938552014-09-25 13:20:05 -0500715 (size_t)max_len), nlt, map_type);
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400716 name.len -= nls_nullsize(nlt);
717 } else {
718 name.name = de.name;
719 name.len = de.namelen;
720 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400722 switch (file_info->srch_inf.info_level) {
723 case SMB_FIND_FILE_UNIX:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700724 cifs_unix_basic_to_fattr(&fattr,
Christoph Hellwig9feed6f2011-07-16 15:23:49 -0400725 &((FILE_UNIX_INFO *)find_entry)->basic,
726 cifs_sb);
727 break;
728 case SMB_FIND_FILE_INFO_STANDARD:
729 cifs_std_info_to_fattr(&fattr,
730 (FIND_FILE_STANDARD_INFO *)find_entry,
731 cifs_sb);
732 break;
733 default:
734 cifs_dir_info_to_fattr(&fattr,
735 (FILE_DIRECTORY_INFO *)find_entry,
736 cifs_sb);
737 break;
738 }
Steve French38702532007-07-08 15:40:40 +0000739
Christoph Hellwigf16d59b2011-07-16 15:24:22 -0400740 if (de.ino && (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
741 fattr.cf_uniqueid = de.ino;
Jeff Laytonec06aed2009-11-06 14:18:29 -0500742 } else {
Jeff Layton0b8f18e2009-07-09 01:46:37 -0400743 fattr.cf_uniqueid = iunique(sb, ROOT_I);
Jeff Laytonec06aed2009-11-06 14:18:29 -0500744 cifs_autodisable_serverino(cifs_sb);
745 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700746
Stefan Metzmacher1b12b9c2010-08-05 21:19:56 +0200747 if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) &&
Sachin Prabhucb084b12013-11-25 17:09:50 +0000748 couldbe_mf_symlink(&fattr))
Stefan Metzmacher1b12b9c2010-08-05 21:19:56 +0200749 /*
750 * trying to get the type and mode can be slow,
751 * so just call those regular files for now, and mark
752 * for reval
753 */
754 fattr.cf_flags |= CIFS_FATTR_NEED_REVAL;
755
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500756 cifs_prime_dcache(file->f_dentry, &name, &fattr);
Steve French50c2f752007-07-13 00:33:32 +0000757
Jeff Laytoneb1b3fa2012-12-03 06:05:37 -0500758 ino = cifs_uniqueid_to_ino_t(fattr.cf_uniqueid);
Al Virobe4ccdc2013-05-22 16:17:25 -0400759 return !dir_emit(ctx, name.name, name.len, ino, fattr.cf_dtype);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700760}
761
Linus Torvalds1da177e2005-04-16 15:20:36 -0700762
Al Virobe4ccdc2013-05-22 16:17:25 -0400763int cifs_readdir(struct file *file, struct dir_context *ctx)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764{
765 int rc = 0;
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400766 unsigned int xid;
767 int i;
Pavel Shilovsky92fc65a2012-09-18 16:20:32 -0700768 struct cifs_tcon *tcon;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000770 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700771 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000772 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000773 char *end_of_smb;
Jeff Layton18295792009-04-30 20:45:45 -0400774 unsigned int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700775
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400776 xid = get_xid();
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777
Suresh Jayaraman6221ddd2010-10-01 21:23:33 +0530778 /*
779 * Ensure FindFirst doesn't fail before doing filldir() for '.' and
780 * '..'. Otherwise we won't be able to notify VFS in case of failure.
781 */
782 if (file->private_data == NULL) {
783 rc = initiate_cifs_search(xid, file);
Joe Perchesf96637b2013-05-04 22:12:25 -0500784 cifs_dbg(FYI, "initiate cifs search rc %d\n", rc);
Suresh Jayaraman6221ddd2010-10-01 21:23:33 +0530785 if (rc)
786 goto rddir2_exit;
787 }
788
Al Virobe4ccdc2013-05-22 16:17:25 -0400789 if (!dir_emit_dots(file, ctx))
790 goto rddir2_exit;
791
792 /* 1) If search is active,
793 is in current search buffer?
794 if it before then restart search
795 if after then keep searching till find it */
796
797 if (file->private_data == NULL) {
798 rc = -EINVAL;
799 goto rddir2_exit;
800 }
801 cifsFile = file->private_data;
802 if (cifsFile->srch_inf.endOfSearch) {
803 if (cifsFile->srch_inf.emptyDir) {
804 cifs_dbg(FYI, "End of search, empty dir\n");
805 rc = 0;
806 goto rddir2_exit;
807 }
808 } /* else {
809 cifsFile->invalidHandle = true;
810 tcon->ses->server->close(xid, tcon, &cifsFile->fid);
811 } */
812
813 tcon = tlink_tcon(cifsFile->tlink);
814 rc = find_cifs_entry(xid, tcon, ctx->pos, file, &current_entry,
815 &num_to_fill);
816 if (rc) {
817 cifs_dbg(FYI, "fce error %d\n", rc);
818 goto rddir2_exit;
819 } else if (current_entry != NULL) {
820 cifs_dbg(FYI, "entry %lld found\n", ctx->pos);
821 } else {
822 cifs_dbg(FYI, "could not find entry\n");
823 goto rddir2_exit;
824 }
825 cifs_dbg(FYI, "loop through %d times filling dir for net buf %p\n",
826 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start);
827 max_len = tcon->ses->server->ops->calc_smb_size(
828 cifsFile->srch_inf.ntwrk_buf_start);
829 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
830
831 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
832 if (tmp_buf == NULL) {
833 rc = -ENOMEM;
834 goto rddir2_exit;
835 }
836
837 for (i = 0; i < num_to_fill; i++) {
838 if (current_entry == NULL) {
839 /* evaluate whether this case is an error */
840 cifs_dbg(VFS, "past SMB end, num to fill %d i %d\n",
841 num_to_fill, i);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700842 break;
843 }
Al Virobe4ccdc2013-05-22 16:17:25 -0400844 /*
845 * if buggy server returns . and .. late do we want to
846 * check for that here?
847 */
848 rc = cifs_filldir(current_entry, file, ctx,
849 tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +0000850 if (rc) {
Al Virobe4ccdc2013-05-22 16:17:25 -0400851 if (rc > 0)
852 rc = 0;
Kulikov Vasiliyf55fdcc2010-07-16 20:15:25 +0400853 break;
854 }
855
Al Virobe4ccdc2013-05-22 16:17:25 -0400856 ctx->pos++;
857 if (ctx->pos ==
858 cifsFile->srch_inf.index_of_last_entry) {
859 cifs_dbg(FYI, "last entry in buf at pos %lld %s\n",
860 ctx->pos, tmp_buf);
861 cifs_save_resume_key(current_entry, cifsFile);
862 break;
863 } else
864 current_entry =
865 nxt_dir_entry(current_entry, end_of_smb,
866 cifsFile->srch_inf.info_level);
867 }
868 kfree(tmp_buf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700869
870rddir2_exit:
Pavel Shilovsky6d5786a2012-06-20 11:21:16 +0400871 free_xid(xid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700872 return rc;
873}