blob: 964e097c82035b75f865275f3f7c6b45b3c69a63 [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>
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include <linux/stat.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "cifspdu.h"
27#include "cifsglob.h"
28#include "cifsproto.h"
29#include "cifs_unicode.h"
30#include "cifs_debug.h"
31#include "cifs_fs_sb.h"
32#include "cifsfs.h"
33
Jeff Laytonf5884162009-04-30 07:18:00 -040034/*
35 * To be safe - for UCS to UTF-8 with strings loaded with the rare long
36 * characters alloc more to account for such multibyte target UTF-8
37 * characters.
38 */
39#define UNICODE_NAME_MAX ((4 * NAME_MAX) + 2)
40
Steve French39798772006-05-31 22:40:51 +000041#ifdef CONFIG_CIFS_DEBUG2
42static void dump_cifs_file_struct(struct file *file, char *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -070043{
Steve French6dc0f872007-07-06 23:13:06 +000044 struct cifsFileInfo *cf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070045
Steve French4523cc32007-04-30 20:13:06 +000046 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 cf = file->private_data;
Steve French4523cc32007-04-30 20:13:06 +000048 if (cf == NULL) {
Steve French6dc0f872007-07-06 23:13:06 +000049 cFYI(1, ("empty cifs private file data"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070050 return;
51 }
Steve Frenchad7a2922008-02-07 23:25:02 +000052 if (cf->invalidHandle)
Steve French6dc0f872007-07-06 23:13:06 +000053 cFYI(1, ("invalid handle"));
Steve Frenchad7a2922008-02-07 23:25:02 +000054 if (cf->srch_inf.endOfSearch)
Steve French6dc0f872007-07-06 23:13:06 +000055 cFYI(1, ("end of search"));
Steve Frenchad7a2922008-02-07 23:25:02 +000056 if (cf->srch_inf.emptyDir)
Steve French6dc0f872007-07-06 23:13:06 +000057 cFYI(1, ("empty dir"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 }
Steve French39798772006-05-31 22:40:51 +000059}
Steve French90c81e02008-02-12 20:32:36 +000060#else
61static inline void dump_cifs_file_struct(struct file *file, char *label)
62{
63}
Steve French39798772006-05-31 22:40:51 +000064#endif /* DEBUG2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070065
Jeff Layton132ac7b2009-02-10 07:33:57 -050066/* Returns 1 if new inode created, 2 if both dentry and inode were */
Linus Torvalds1da177e2005-04-16 15:20:36 -070067/* Might check in the future if inode number changed so we can rehash inode */
Jeff Layton132ac7b2009-02-10 07:33:57 -050068static int
69construct_dentry(struct qstr *qstring, struct file *file,
70 struct inode **ptmp_inode, struct dentry **pnew_dentry,
Jeff Layton950ec522009-02-11 08:08:26 -050071 __u64 *inum)
Linus Torvalds1da177e2005-04-16 15:20:36 -070072{
Jeff Layton132ac7b2009-02-10 07:33:57 -050073 struct dentry *tmp_dentry = NULL;
74 struct super_block *sb = file->f_path.dentry->d_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 int rc = 0;
76
Steve French966ca922005-04-28 22:41:08 -070077 cFYI(1, ("For %s", qstring->name));
Linus Torvalds1da177e2005-04-16 15:20:36 -070078
79 qstring->hash = full_name_hash(qstring->name, qstring->len);
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080080 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
Linus Torvalds1da177e2005-04-16 15:20:36 -070081 if (tmp_dentry) {
Jeff Layton132ac7b2009-02-10 07:33:57 -050082 /* BB: overwrite old name? i.e. tmp_dentry->d_name and
83 * tmp_dentry->d_name.len??
84 */
Steve French6dc0f872007-07-06 23:13:06 +000085 cFYI(0, ("existing dentry with inode 0x%p",
86 tmp_dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -070087 *ptmp_inode = tmp_dentry->d_inode;
Steve French4523cc32007-04-30 20:13:06 +000088 if (*ptmp_inode == NULL) {
Jeff Layton132ac7b2009-02-10 07:33:57 -050089 *ptmp_inode = cifs_new_inode(sb, inum);
Steve French4523cc32007-04-30 20:13:06 +000090 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 return rc;
92 rc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070093 }
94 } else {
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080095 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
Steve French4523cc32007-04-30 20:13:06 +000096 if (tmp_dentry == NULL) {
Steve French6dc0f872007-07-06 23:13:06 +000097 cERROR(1, ("Failed allocating dentry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070098 *ptmp_inode = NULL;
99 return rc;
100 }
101
Jeff Layton132ac7b2009-02-10 07:33:57 -0500102 if (CIFS_SB(sb)->tcon->nocase)
Steve Frenchb92327f2005-08-22 20:09:43 -0700103 tmp_dentry->d_op = &cifs_ci_dentry_ops;
104 else
105 tmp_dentry->d_op = &cifs_dentry_ops;
Jeff Layton132ac7b2009-02-10 07:33:57 -0500106
107 *ptmp_inode = cifs_new_inode(sb, inum);
Steve French4523cc32007-04-30 20:13:06 +0000108 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700109 return rc;
Steve Frenchb835beb2006-09-06 22:02:22 +0000110 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111 }
112
113 tmp_dentry->d_time = jiffies;
114 *pnew_dentry = tmp_dentry;
115 return rc;
116}
117
Steve French790fe572007-07-07 19:25:05 +0000118static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode)
Steve French533f90a2006-10-12 00:02:32 +0000119{
Steve French4523cc32007-04-30 20:13:06 +0000120 if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
Steve Frenchddae9572006-10-12 01:23:29 +0000121 inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
122 inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
123 inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
Steve French533f90a2006-10-12 00:02:32 +0000124 }
125 return;
126}
127
128
Steve French5bafd762006-06-07 00:18:43 +0000129static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
Steve French2c2130e2007-10-12 19:10:28 +0000130 char *buf, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131{
Steve French966ca922005-04-28 22:41:08 -0700132 loff_t local_size;
133 struct timespec local_mtime;
134
Linus Torvalds1da177e2005-04-16 15:20:36 -0700135 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
136 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
Steve French5bafd762006-06-07 00:18:43 +0000137 __u32 attr;
138 __u64 allocation_size;
139 __u64 end_of_file;
Jeff Layton4468eb32008-05-22 09:31:40 -0400140 umode_t default_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Steve French966ca922005-04-28 22:41:08 -0700142 /* save mtime and size */
143 local_mtime = tmp_inode->i_mtime;
144 local_size = tmp_inode->i_size;
145
Steve French4523cc32007-04-30 20:13:06 +0000146 if (new_buf_type) {
Steve French5bafd762006-06-07 00:18:43 +0000147 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
148
149 attr = le32_to_cpu(pfindData->ExtFileAttributes);
150 allocation_size = le64_to_cpu(pfindData->AllocationSize);
151 end_of_file = le64_to_cpu(pfindData->EndOfFile);
152 tmp_inode->i_atime =
153 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
154 tmp_inode->i_mtime =
155 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
156 tmp_inode->i_ctime =
157 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
158 } else { /* legacy, OS2 and DOS style */
Steve French1bd5bbc2006-09-28 03:35:57 +0000159/* struct timespec ts;*/
Steve Frenchad7a2922008-02-07 23:25:02 +0000160 FIND_FILE_STANDARD_INFO *pfindData =
Steve French5bafd762006-06-07 00:18:43 +0000161 (FIND_FILE_STANDARD_INFO *)buf;
162
Steve French268f3be2006-10-06 21:47:09 +0000163 tmp_inode->i_mtime = cnvrtDosUnixTm(
Steve French1bd5bbc2006-09-28 03:35:57 +0000164 le16_to_cpu(pfindData->LastWriteDate),
Steve French268f3be2006-10-06 21:47:09 +0000165 le16_to_cpu(pfindData->LastWriteTime));
166 tmp_inode->i_atime = cnvrtDosUnixTm(
167 le16_to_cpu(pfindData->LastAccessDate),
168 le16_to_cpu(pfindData->LastAccessTime));
Steve Frencha8507902007-02-06 20:43:30 +0000169 tmp_inode->i_ctime = cnvrtDosUnixTm(
170 le16_to_cpu(pfindData->LastWriteDate),
171 le16_to_cpu(pfindData->LastWriteTime));
Steve French533f90a2006-10-12 00:02:32 +0000172 AdjustForTZ(cifs_sb->tcon, tmp_inode);
Steve French5bafd762006-06-07 00:18:43 +0000173 attr = le16_to_cpu(pfindData->Attributes);
174 allocation_size = le32_to_cpu(pfindData->AllocationSize);
175 end_of_file = le32_to_cpu(pfindData->DataSize);
Steve French5bafd762006-06-07 00:18:43 +0000176 }
177
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 /* Linux can not store file creation time unfortunately so ignore it */
Steve French5bafd762006-06-07 00:18:43 +0000179
180 cifsInfo->cifsAttrs = attr;
Steve Frencha6f8de32007-11-08 23:10:32 +0000181#ifdef CONFIG_CIFS_EXPERIMENTAL
182 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
183 /* get more accurate mode via ACL - so force inode refresh */
184 cifsInfo->time = 0;
185 } else
186#endif /* CONFIG_CIFS_EXPERIMENTAL */
187 cifsInfo->time = jiffies;
Steve French5bafd762006-06-07 00:18:43 +0000188
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
190 /* 2767 perms - indicate mandatory locking */
Steve French790fe572007-07-07 19:25:05 +0000191 /* BB fill in uid and gid here? with help from winbind?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 or retrieve from NTFS stream extended attribute */
193 if (atomic_read(&cifsInfo->inUse) == 0) {
194 tmp_inode->i_uid = cifs_sb->mnt_uid;
195 tmp_inode->i_gid = cifs_sb->mnt_gid;
Jeff Layton4468eb32008-05-22 09:31:40 -0400196 }
197
198 if (attr & ATTR_DIRECTORY)
199 default_mode = cifs_sb->mnt_dir_mode;
200 else
201 default_mode = cifs_sb->mnt_file_mode;
202
203 /* set initial permissions */
204 if ((atomic_read(&cifsInfo->inUse) == 0) ||
205 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
206 tmp_inode->i_mode = default_mode;
207 else {
208 /* just reenable write bits if !ATTR_READONLY */
209 if ((tmp_inode->i_mode & S_IWUGO) == 0 &&
210 (attr & ATTR_READONLY) == 0)
211 tmp_inode->i_mode |= (S_IWUGO & default_mode);
212
Steve French3020a1f2005-11-18 11:31:10 -0800213 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700214 }
215
Jeff Layton4468eb32008-05-22 09:31:40 -0400216 /* clear write bits if ATTR_READONLY is set */
217 if (attr & ATTR_READONLY)
218 tmp_inode->i_mode &= ~S_IWUGO;
219
220 /* set inode type */
221 if ((attr & ATTR_SYSTEM) &&
222 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
Steve French3020a1f2005-11-18 11:31:10 -0800223 if (end_of_file == 0) {
Steve French3020a1f2005-11-18 11:31:10 -0800224 tmp_inode->i_mode |= S_IFIFO;
Jeff Layton4468eb32008-05-22 09:31:40 -0400225 *pobject_type = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800226 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400227 /*
228 * trying to get the type can be slow, so just call
229 * this a regular file for now, and mark for reval
230 */
Steve French790fe572007-07-07 19:25:05 +0000231 tmp_inode->i_mode |= S_IFREG;
Jeff Layton4468eb32008-05-22 09:31:40 -0400232 *pobject_type = DT_REG;
Steve French790fe572007-07-07 19:25:05 +0000233 cifsInfo->time = 0;
Steve French3020a1f2005-11-18 11:31:10 -0800234 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400236 if (attr & ATTR_DIRECTORY) {
237 tmp_inode->i_mode |= S_IFDIR;
238 *pobject_type = DT_DIR;
239 } else {
240 tmp_inode->i_mode |= S_IFREG;
241 *pobject_type = DT_REG;
242 }
243 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700244
245 /* can not fill in nlink here as in qpathinfo version and Unx search */
Steve Frenchad7a2922008-02-07 23:25:02 +0000246 if (atomic_read(&cifsInfo->inUse) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 atomic_set(&cifsInfo->inUse, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700248
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400249 cifsInfo->server_eof = end_of_file;
Steve French3677db12007-02-26 16:46:11 +0000250 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000251 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000252 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253 client is writing to it due to potential races */
254 i_size_write(tmp_inode, end_of_file);
255
256 /* 512 bytes (2**9) is the fake blocksize that must be used */
257 /* for this calculation, even though the reported blocksize is larger */
258 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
259 }
Steve French3677db12007-02-26 16:46:11 +0000260 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261
262 if (allocation_size < end_of_file)
263 cFYI(1, ("May be sparse file, allocation less than file size"));
Theodore Ts'oba52de12006-09-27 01:50:49 -0700264 cFYI(1, ("File Size %ld and blocks %llu",
Andrew Morton5515eff2006-03-26 01:37:53 -0800265 (unsigned long)tmp_inode->i_size,
Theodore Ts'oba52de12006-09-27 01:50:49 -0700266 (unsigned long long)tmp_inode->i_blocks));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 if (S_ISREG(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700268 cFYI(1, ("File inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 tmp_inode->i_op = &cifs_file_inode_ops;
Steve French4523cc32007-04-30 20:13:06 +0000270 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
271 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800272 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
273 else
274 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000275 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800276 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700277 else
278 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800279
Steve French4523cc32007-04-30 20:13:06 +0000280 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve Frenchbfa0d752005-08-31 21:50:37 -0700281 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000282 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
283 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
284 else
285 tmp_inode->i_data.a_ops = &cifs_addr_ops;
286
Steve French4523cc32007-04-30 20:13:06 +0000287 if (isNewInode)
Steve Frenchdfb75332005-06-22 17:13:47 -0700288 return; /* No sense invalidating pages for new inode
289 since have not started caching readahead file
290 data yet */
Steve French966ca922005-04-28 22:41:08 -0700291
292 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
293 (local_size == tmp_inode->i_size)) {
294 cFYI(1, ("inode exists but unchanged"));
295 } else {
296 /* file may have changed on server */
297 cFYI(1, ("invalidate inode, readdir detected change"));
298 invalidate_remote_inode(tmp_inode);
299 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 } else if (S_ISDIR(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700301 cFYI(1, ("Directory inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 tmp_inode->i_op = &cifs_dir_inode_ops;
303 tmp_inode->i_fop = &cifs_dir_ops;
304 } else if (S_ISLNK(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700305 cFYI(1, ("Symbolic Link inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 tmp_inode->i_op = &cifs_symlink_inode_ops;
307 } else {
Steve French966ca922005-04-28 22:41:08 -0700308 cFYI(1, ("Init special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 init_special_inode(tmp_inode, tmp_inode->i_mode,
310 tmp_inode->i_rdev);
311 }
312}
313
314static void unix_fill_in_inode(struct inode *tmp_inode,
Steve French2c2130e2007-10-12 19:10:28 +0000315 FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316{
Steve French966ca922005-04-28 22:41:08 -0700317 loff_t local_size;
318 struct timespec local_mtime;
319
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
321 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
322
323 __u32 type = le32_to_cpu(pfindData->Type);
324 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
325 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
326 cifsInfo->time = jiffies;
327 atomic_inc(&cifsInfo->inUse);
328
Steve French966ca922005-04-28 22:41:08 -0700329 /* save mtime and size */
330 local_mtime = tmp_inode->i_mtime;
331 local_size = tmp_inode->i_size;
332
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333 tmp_inode->i_atime =
334 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
335 tmp_inode->i_mtime =
336 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
337 tmp_inode->i_ctime =
338 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
339
340 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
Steve French3020a1f2005-11-18 11:31:10 -0800341 /* since we set the inode type below we need to mask off type
Steve French790fe572007-07-07 19:25:05 +0000342 to avoid strange results if bits above were corrupt */
343 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 if (type == UNIX_FILE) {
345 *pobject_type = DT_REG;
346 tmp_inode->i_mode |= S_IFREG;
347 } else if (type == UNIX_SYMLINK) {
348 *pobject_type = DT_LNK;
349 tmp_inode->i_mode |= S_IFLNK;
350 } else if (type == UNIX_DIR) {
351 *pobject_type = DT_DIR;
352 tmp_inode->i_mode |= S_IFDIR;
353 } else if (type == UNIX_CHARDEV) {
354 *pobject_type = DT_CHR;
355 tmp_inode->i_mode |= S_IFCHR;
356 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
357 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
358 } else if (type == UNIX_BLOCKDEV) {
359 *pobject_type = DT_BLK;
360 tmp_inode->i_mode |= S_IFBLK;
361 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
362 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
363 } else if (type == UNIX_FIFO) {
364 *pobject_type = DT_FIFO;
365 tmp_inode->i_mode |= S_IFIFO;
366 } else if (type == UNIX_SOCKET) {
367 *pobject_type = DT_SOCK;
368 tmp_inode->i_mode |= S_IFSOCK;
Steve French3020a1f2005-11-18 11:31:10 -0800369 } else {
370 /* safest to just call it a file */
371 *pobject_type = DT_REG;
372 tmp_inode->i_mode |= S_IFREG;
Steve French790fe572007-07-07 19:25:05 +0000373 cFYI(1, ("unknown inode type %d", type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374 }
375
Steve French4523cc32007-04-30 20:13:06 +0000376 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
377 tmp_inode->i_uid = cifs_sb->mnt_uid;
378 else
379 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
380 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
381 tmp_inode->i_gid = cifs_sb->mnt_gid;
382 else
383 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700384 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
385
Jeff Laytonfbec9ab2009-04-03 13:44:00 -0400386 cifsInfo->server_eof = end_of_file;
Steve French3677db12007-02-26 16:46:11 +0000387 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000388 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000389 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 client is writing to it due to potential races */
Steve French7ba52632007-02-08 18:14:13 +0000391 i_size_write(tmp_inode, end_of_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392
393 /* 512 bytes (2**9) is the fake blocksize that must be used */
394 /* for this calculation, not the real blocksize */
395 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
396 }
Steve French3677db12007-02-26 16:46:11 +0000397 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398
399 if (S_ISREG(tmp_inode->i_mode)) {
400 cFYI(1, ("File inode"));
401 tmp_inode->i_op = &cifs_file_inode_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800402
Steve French4523cc32007-04-30 20:13:06 +0000403 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
404 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800405 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
406 else
407 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000408 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800409 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 else
411 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800412
Steve French4523cc32007-04-30 20:13:06 +0000413 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve French790fe572007-07-07 19:25:05 +0000414 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000415 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
416 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
417 else
418 tmp_inode->i_data.a_ops = &cifs_addr_ops;
Steve French966ca922005-04-28 22:41:08 -0700419
Steve French4523cc32007-04-30 20:13:06 +0000420 if (isNewInode)
Steve French790fe572007-07-07 19:25:05 +0000421 return; /* No sense invalidating pages for new inode
422 since we have not started caching readahead
423 file data for it yet */
Steve French966ca922005-04-28 22:41:08 -0700424
425 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
426 (local_size == tmp_inode->i_size)) {
427 cFYI(1, ("inode exists but unchanged"));
428 } else {
429 /* file may have changed on server */
430 cFYI(1, ("invalidate inode, readdir detected change"));
431 invalidate_remote_inode(tmp_inode);
432 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433 } else if (S_ISDIR(tmp_inode->i_mode)) {
434 cFYI(1, ("Directory inode"));
435 tmp_inode->i_op = &cifs_dir_inode_ops;
436 tmp_inode->i_fop = &cifs_dir_ops;
437 } else if (S_ISLNK(tmp_inode->i_mode)) {
438 cFYI(1, ("Symbolic Link inode"));
439 tmp_inode->i_op = &cifs_symlink_inode_ops;
440/* tmp_inode->i_fop = *//* do not need to set to anything */
441 } else {
Steve French790fe572007-07-07 19:25:05 +0000442 cFYI(1, ("Special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700443 init_special_inode(tmp_inode, tmp_inode->i_mode,
444 tmp_inode->i_rdev);
445 }
446}
447
Steve French0e0d2cf2009-05-01 05:27:32 +0000448/* BB eventually need to add the following helper function to
449 resolve NT_STATUS_STOPPED_ON_SYMLINK return code when
450 we try to do FindFirst on (NTFS) directory symlinks */
451/*
452int get_symlink_reparse_path(char *full_path, struct cifs_sb_info *cifs_sb,
453 int xid)
454{
455 __u16 fid;
456 int len;
457 int oplock = 0;
458 int rc;
459 struct cifsTconInfo *ptcon = cifs_sb->tcon;
460 char *tmpbuffer;
461
462 rc = CIFSSMBOpen(xid, ptcon, full_path, FILE_OPEN, GENERIC_READ,
463 OPEN_REPARSE_POINT, &fid, &oplock, NULL,
464 cifs_sb->local_nls,
465 cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR);
466 if (!rc) {
467 tmpbuffer = kmalloc(maxpath);
468 rc = CIFSSMBQueryReparseLinkInfo(xid, ptcon, full_path,
469 tmpbuffer,
470 maxpath -1,
471 fid,
472 cifs_sb->local_nls);
473 if (CIFSSMBClose(xid, ptcon, fid)) {
474 cFYI(1, ("Error closing temporary reparsepoint open)"));
475 }
476 }
477}
478 */
479
Linus Torvalds1da177e2005-04-16 15:20:36 -0700480static int initiate_cifs_search(const int xid, struct file *file)
481{
482 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000483 char *full_path;
484 struct cifsFileInfo *cifsFile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700485 struct cifs_sb_info *cifs_sb;
486 struct cifsTconInfo *pTcon;
487
Steve French4523cc32007-04-30 20:13:06 +0000488 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +0000489 file->private_data =
490 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700491 }
492
Steve French4523cc32007-04-30 20:13:06 +0000493 if (file->private_data == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700494 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700495 cifsFile = file->private_data;
Steve French4b18f2a2008-04-29 00:06:05 +0000496 cifsFile->invalidHandle = true;
497 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700498
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800499 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Steve French4523cc32007-04-30 20:13:06 +0000500 if (cifs_sb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 return -EINVAL;
502
503 pTcon = cifs_sb->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000504 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700505 return -EINVAL;
506
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800507 full_path = build_path_from_dentry(file->f_path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Steve Frenchad7a2922008-02-07 23:25:02 +0000509 if (full_path == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511
Steve French966ca922005-04-28 22:41:08 -0700512 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513
Steve French75cf6bd2005-04-28 22:41:04 -0700514ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700515 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000516 /* but now check for them on the share/mount not on the SMB session */
517/* if (pTcon->ses->capabilities & CAP_UNIX) { */
Steve Frenchad7a2922008-02-07 23:25:02 +0000518 if (pTcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000519 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Steve Frenchad7a2922008-02-07 23:25:02 +0000520 else if ((pTcon->ses->capabilities &
Steve French5bafd762006-06-07 00:18:43 +0000521 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
522 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
524 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
525 } else /* not srvinos - BB fixme add check for backlevel? */ {
526 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
527 }
528
Steve French38702532007-07-08 15:40:40 +0000529 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700530 &cifsFile->netfid, &cifsFile->srch_inf,
Steve French38702532007-07-08 15:40:40 +0000531 cifs_sb->mnt_cifs_flags &
Steve Frencheafe8702005-09-15 21:47:30 -0700532 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
Steve French4523cc32007-04-30 20:13:06 +0000533 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000534 cifsFile->invalidHandle = false;
Steve Frenche836f012009-05-01 16:20:35 +0000535 /* BB add following call to handle readdir on new NTFS symlink errors
Steve French0e0d2cf2009-05-01 05:27:32 +0000536 else if STATUS_STOPPED_ON_SYMLINK
537 call get_symlink_reparse_path and retry with new path */
538 else if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700539 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
540 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
541 goto ffirst_retry;
542 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700543 kfree(full_path);
544 return rc;
545}
546
547/* return length of unicode string in bytes */
548static int cifs_unicode_bytelen(char *str)
549{
550 int len;
Steve French63d25832007-11-05 21:46:10 +0000551 __le16 *ustr = (__le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700552
Steve French38702532007-07-08 15:40:40 +0000553 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000554 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 return len << 1;
556 }
Steve French790fe572007-07-07 19:25:05 +0000557 cFYI(1, ("Unicode string longer than PATH_MAX found"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700558 return len << 1;
559}
560
Steve French5bafd762006-06-07 00:18:43 +0000561static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562{
Steve French38702532007-07-08 15:40:40 +0000563 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000564 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700565
Steve French4523cc32007-04-30 20:13:06 +0000566 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000567 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000568 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
569
570 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
571 pfData->FileNameLength;
572 } else
573 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Steve French790fe572007-07-07 19:25:05 +0000574 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000576 if (new_entry >= end_of_smb) {
Steve French09d1db52005-04-28 22:41:08 -0700577 cERROR(1,
578 ("search entry %p began after end of SMB %p old entry %p",
Steve French38702532007-07-08 15:40:40 +0000579 new_entry, end_of_smb, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700580 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000581 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000582 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
583 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000584 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Steve French38702532007-07-08 15:40:40 +0000585 cERROR(1, ("search entry %p extends after end of SMB %p",
Steve French09d1db52005-04-28 22:41:08 -0700586 new_entry, end_of_smb));
587 return NULL;
Steve French38702532007-07-08 15:40:40 +0000588 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 return new_entry;
590
591}
592
593#define UNICODE_DOT cpu_to_le16(0x2e)
594
595/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
596static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
597{
598 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000599 char *filename = NULL;
600 int len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700601
Steve French4523cc32007-04-30 20:13:06 +0000602 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000603 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 filename = &pFindData->FileName[0];
Steve French4523cc32007-04-30 20:13:06 +0000605 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 len = cifs_unicode_bytelen(filename);
607 } else {
608 /* BB should we make this strnlen of PATH_MAX? */
609 len = strnlen(filename, 5);
610 }
Steve French4523cc32007-04-30 20:13:06 +0000611 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000612 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 (FILE_DIRECTORY_INFO *)current_entry;
614 filename = &pFindData->FileName[0];
615 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000616 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000617 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000618 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 (FILE_FULL_DIRECTORY_INFO *)current_entry;
620 filename = &pFindData->FileName[0];
621 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000622 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000623 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000624 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700625 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
626 filename = &pFindData->FileName[0];
627 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000628 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000629 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000630 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700631 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
632 filename = &pFindData->FileName[0];
633 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000634 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000635 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000636 (FIND_FILE_STANDARD_INFO *)current_entry;
637 filename = &pFindData->FileName[0];
Steve French5ddaa682006-08-15 13:35:48 +0000638 len = pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700639 } else {
Steve French790fe572007-07-07 19:25:05 +0000640 cFYI(1, ("Unknown findfirst level %d",
641 cfile->srch_inf.info_level));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700642 }
643
Steve French4523cc32007-04-30 20:13:06 +0000644 if (filename) {
645 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700646 __le16 *ufilename = (__le16 *)filename;
Steve French4523cc32007-04-30 20:13:06 +0000647 if (len == 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700648 /* check for . */
Steve French4523cc32007-04-30 20:13:06 +0000649 if (ufilename[0] == UNICODE_DOT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700650 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000651 } else if (len == 4) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700652 /* check for .. */
Steve French4523cc32007-04-30 20:13:06 +0000653 if ((ufilename[0] == UNICODE_DOT)
Steve French38702532007-07-08 15:40:40 +0000654 && (ufilename[1] == UNICODE_DOT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700655 rc = 2;
656 }
657 } else /* ASCII */ {
Steve French4523cc32007-04-30 20:13:06 +0000658 if (len == 1) {
Steve French38702532007-07-08 15:40:40 +0000659 if (filename[0] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700660 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000661 } else if (len == 2) {
Steve French790fe572007-07-07 19:25:05 +0000662 if ((filename[0] == '.') && (filename[1] == '.'))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700663 rc = 2;
664 }
665 }
666 }
667
668 return rc;
669}
670
Steve Frencheafe8702005-09-15 21:47:30 -0700671/* Check if directory that we are searching has changed so we can decide
672 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000673static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700674{
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000675 struct inode *inode = file->f_path.dentry->d_inode;
676 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700677
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000678 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700679 return 1; /* directory was changed, perhaps due to unlink */
680 else
681 return 0;
682
683}
684
Steve French0752f152008-10-07 20:03:33 +0000685static int cifs_save_resume_key(const char *current_entry,
686 struct cifsFileInfo *cifsFile)
687{
688 int rc = 0;
689 unsigned int len = 0;
690 __u16 level;
691 char *filename;
692
693 if ((cifsFile == NULL) || (current_entry == NULL))
694 return -EINVAL;
695
696 level = cifsFile->srch_inf.info_level;
697
698 if (level == SMB_FIND_FILE_UNIX) {
699 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
700
701 filename = &pFindData->FileName[0];
702 if (cifsFile->srch_inf.unicode) {
703 len = cifs_unicode_bytelen(filename);
704 } else {
705 /* BB should we make this strnlen of PATH_MAX? */
706 len = strnlen(filename, PATH_MAX);
707 }
708 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
709 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
710 FILE_DIRECTORY_INFO *pFindData =
711 (FILE_DIRECTORY_INFO *)current_entry;
712 filename = &pFindData->FileName[0];
713 len = le32_to_cpu(pFindData->FileNameLength);
714 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
715 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
716 FILE_FULL_DIRECTORY_INFO *pFindData =
717 (FILE_FULL_DIRECTORY_INFO *)current_entry;
718 filename = &pFindData->FileName[0];
719 len = le32_to_cpu(pFindData->FileNameLength);
720 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
721 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
722 SEARCH_ID_FULL_DIR_INFO *pFindData =
723 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
724 filename = &pFindData->FileName[0];
725 len = le32_to_cpu(pFindData->FileNameLength);
726 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
727 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
728 FILE_BOTH_DIRECTORY_INFO *pFindData =
729 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
730 filename = &pFindData->FileName[0];
731 len = le32_to_cpu(pFindData->FileNameLength);
732 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
733 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
734 FIND_FILE_STANDARD_INFO *pFindData =
735 (FIND_FILE_STANDARD_INFO *)current_entry;
736 filename = &pFindData->FileName[0];
737 /* one byte length, no name conversion */
738 len = (unsigned int)pFindData->FileNameLength;
739 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
740 } else {
741 cFYI(1, ("Unknown findfirst level %d", level));
742 return -EINVAL;
743 }
744 cifsFile->srch_inf.resume_name_len = len;
745 cifsFile->srch_inf.presume_name = filename;
746 return rc;
747}
748
Linus Torvalds1da177e2005-04-16 15:20:36 -0700749/* find the corresponding entry in the search */
750/* Note that the SMB server returns search entries for . and .. which
751 complicates logic here if we choose to parse for them and we do not
752 assume that they are located in the findfirst return buffer.*/
753/* We start counting in the buffer with entry 2 and increment for every
754 entry (do not increment for . or .. entry) */
755static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
Steve French38702532007-07-08 15:40:40 +0000756 struct file *file, char **ppCurrentEntry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700757{
758 int rc = 0;
759 int pos_in_buf = 0;
760 loff_t first_entry_in_buffer;
761 loff_t index_to_find = file->f_pos;
Steve French38702532007-07-08 15:40:40 +0000762 struct cifsFileInfo *cifsFile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000764
Steve French38702532007-07-08 15:40:40 +0000765 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700766 (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000768
Linus Torvalds1da177e2005-04-16 15:20:36 -0700769 *ppCurrentEntry = NULL;
Steve French38702532007-07-08 15:40:40 +0000770 first_entry_in_buffer =
771 cifsFile->srch_inf.index_of_last_entry -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700772 cifsFile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000773
774 /* if first entry in buf is zero then is first buffer
775 in search response data which means it is likely . and ..
776 will be in this buffer, although some servers do not return
777 . and .. for the root of a drive and for those we need
778 to start two entries earlier */
779
Steve French39798772006-05-31 22:40:51 +0000780 dump_cifs_file_struct(file, "In fce ");
Steve French38702532007-07-08 15:40:40 +0000781 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
782 is_dir_changed(file)) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700783 (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 /* close and restart search */
Steve French790fe572007-07-07 19:25:05 +0000785 cFYI(1, ("search backing up - close and restart search"));
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000786 write_lock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000787 if (!cifsFile->srch_inf.endOfSearch &&
788 !cifsFile->invalidHandle) {
789 cifsFile->invalidHandle = true;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000790 write_unlock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000791 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000792 } else
793 write_unlock(&GlobalSMBSeslock);
Steve French4523cc32007-04-30 20:13:06 +0000794 if (cifsFile->srch_inf.ntwrk_buf_start) {
Steve French790fe572007-07-07 19:25:05 +0000795 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
Steve French4523cc32007-04-30 20:13:06 +0000796 if (cifsFile->srch_inf.smallBuf)
Steve Frenchd47d7c12006-02-28 03:45:48 +0000797 cifs_small_buf_release(cifsFile->srch_inf.
798 ntwrk_buf_start);
799 else
800 cifs_buf_release(cifsFile->srch_inf.
801 ntwrk_buf_start);
Shirish Pargaonkar76c510a2008-07-24 14:48:33 +0000802 cifsFile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 }
Steve French38702532007-07-08 15:40:40 +0000804 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000805 if (rc) {
Steve French790fe572007-07-07 19:25:05 +0000806 cFYI(1, ("error %d reinitiating a search on rewind",
807 rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return rc;
809 }
Jeff Laytona364bc02008-10-21 14:42:13 +0000810 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 }
812
Steve French38702532007-07-08 15:40:40 +0000813 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
Steve French4b18f2a2008-04-29 00:06:05 +0000814 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000815 cFYI(1, ("calling findnext2"));
Steve French38702532007-07-08 15:40:40 +0000816 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
Steve Frenchdfb75332005-06-22 17:13:47 -0700817 &cifsFile->srch_inf);
Jeff Laytona364bc02008-10-21 14:42:13 +0000818 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Steve French4523cc32007-04-30 20:13:06 +0000819 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 return -ENOENT;
821 }
Steve French4523cc32007-04-30 20:13:06 +0000822 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 /* we found the buffer that contains the entry */
824 /* scan and find it */
825 int i;
Steve French38702532007-07-08 15:40:40 +0000826 char *current_entry;
827 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700828 smbCalcSize((struct smb_hdr *)
829 cifsFile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000830
831 current_entry = cifsFile->srch_inf.srch_entries_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
833 - cifsFile->srch_inf.entries_in_buffer;
834 pos_in_buf = index_to_find - first_entry_in_buffer;
Steve French790fe572007-07-07 19:25:05 +0000835 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
Steve French5bafd762006-06-07 00:18:43 +0000836
Steve Frenchad7a2922008-02-07 23:25:02 +0000837 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700838 /* go entry by entry figuring out which is first */
Steve French38702532007-07-08 15:40:40 +0000839 current_entry = nxt_dir_entry(current_entry, end_of_smb,
Steve French5bafd762006-06-07 00:18:43 +0000840 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 }
Steve French790fe572007-07-07 19:25:05 +0000842 if ((current_entry == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 /* BB fixme - check if we should flag this error */
Steve French38702532007-07-08 15:40:40 +0000844 cERROR(1, ("reached end of buf searching for pos in buf"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700845 " %d index to find %lld rc %d",
Steve French38702532007-07-08 15:40:40 +0000846 pos_in_buf, index_to_find, rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700847 }
848 rc = 0;
849 *ppCurrentEntry = current_entry;
850 } else {
Steve French790fe572007-07-07 19:25:05 +0000851 cFYI(1, ("index not in buffer - could not findnext into it"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700852 return 0;
853 }
854
Steve French790fe572007-07-07 19:25:05 +0000855 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
856 cFYI(1, ("can not return entries pos_in_buf beyond last"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700857 *num_to_ret = 0;
858 } else
859 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700860
861 return rc;
862}
863
864/* inode num, inode type and filename returned */
865static int cifs_get_name_from_search_buf(struct qstr *pqst,
866 char *current_entry, __u16 level, unsigned int unicode,
Jeff Layton18295792009-04-30 20:45:45 -0400867 struct cifs_sb_info *cifs_sb, unsigned int max_len, __u64 *pinum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
869 int rc = 0;
870 unsigned int len = 0;
Steve French38702532007-07-08 15:40:40 +0000871 char *filename;
872 struct nls_table *nlt = cifs_sb->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873
874 *pinum = 0;
875
Steve French790fe572007-07-07 19:25:05 +0000876 if (level == SMB_FIND_FILE_UNIX) {
Steve French38702532007-07-08 15:40:40 +0000877 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700878
879 filename = &pFindData->FileName[0];
Steve French790fe572007-07-07 19:25:05 +0000880 if (unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700881 len = cifs_unicode_bytelen(filename);
882 } else {
883 /* BB should we make this strnlen of PATH_MAX? */
884 len = strnlen(filename, PATH_MAX);
885 }
886
Steve French85a6dac2009-04-01 05:22:00 +0000887 *pinum = le64_to_cpu(pFindData->UniqueId);
Steve French790fe572007-07-07 19:25:05 +0000888 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000889 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 (FILE_DIRECTORY_INFO *)current_entry;
891 filename = &pFindData->FileName[0];
892 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000893 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000894 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895 (FILE_FULL_DIRECTORY_INFO *)current_entry;
896 filename = &pFindData->FileName[0];
897 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000898 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve French38702532007-07-08 15:40:40 +0000899 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700900 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
901 filename = &pFindData->FileName[0];
902 len = le32_to_cpu(pFindData->FileNameLength);
Steve French85a6dac2009-04-01 05:22:00 +0000903 *pinum = le64_to_cpu(pFindData->UniqueId);
Steve French790fe572007-07-07 19:25:05 +0000904 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000905 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
907 filename = &pFindData->FileName[0];
908 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000909 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000910 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000911 (FIND_FILE_STANDARD_INFO *)current_entry;
912 filename = &pFindData->FileName[0];
913 /* one byte length, no name conversion */
914 len = (unsigned int)pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 } else {
Steve French790fe572007-07-07 19:25:05 +0000916 cFYI(1, ("Unknown findfirst level %d", level));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700917 return -EINVAL;
918 }
Steve French5bafd762006-06-07 00:18:43 +0000919
Steve French790fe572007-07-07 19:25:05 +0000920 if (len > max_len) {
Steve French38702532007-07-08 15:40:40 +0000921 cERROR(1, ("bad search response length %d past smb end", len));
Steve French5bafd762006-06-07 00:18:43 +0000922 return -EINVAL;
923 }
924
Steve French790fe572007-07-07 19:25:05 +0000925 if (unicode) {
Jeff Laytonf5884162009-04-30 07:18:00 -0400926 pqst->len = cifs_from_ucs2((char *) pqst->name,
927 (__le16 *) filename,
Jeff Layton18295792009-04-30 20:45:45 -0400928 UNICODE_NAME_MAX,
929 min(len, max_len), nlt,
Jeff Laytonf5884162009-04-30 07:18:00 -0400930 cifs_sb->mnt_cifs_flags &
931 CIFS_MOUNT_MAP_SPECIAL_CHR);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700932 } else {
933 pqst->name = filename;
934 pqst->len = len;
935 }
Steve French38702532007-07-08 15:40:40 +0000936 pqst->hash = full_name_hash(pqst->name, pqst->len);
Steve French790fe572007-07-07 19:25:05 +0000937/* cFYI(1, ("filldir on %s",pqst->name)); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700938 return rc;
939}
940
Jeff Layton18295792009-04-30 20:45:45 -0400941static int cifs_filldir(char *pfindEntry, struct file *file, filldir_t filldir,
942 void *direntry, char *scratch_buf, unsigned int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700943{
944 int rc = 0;
945 struct qstr qstring;
Steve French38702532007-07-08 15:40:40 +0000946 struct cifsFileInfo *pCifsF;
Steve French2c2130e2007-10-12 19:10:28 +0000947 unsigned int obj_type;
Jeff Layton950ec522009-02-11 08:08:26 -0500948 __u64 inum;
Steve French38702532007-07-08 15:40:40 +0000949 struct cifs_sb_info *cifs_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950 struct inode *tmp_inode;
951 struct dentry *tmp_dentry;
952
953 /* get filename and len into qstring */
954 /* get dentry */
955 /* decide whether to create and populate ionde */
Steve French790fe572007-07-07 19:25:05 +0000956 if ((direntry == NULL) || (file == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700957 return -EINVAL;
958
959 pCifsF = file->private_data;
Steve French50c2f752007-07-13 00:33:32 +0000960
Steve French790fe572007-07-07 19:25:05 +0000961 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700962 return -ENOENT;
963
Steve French38702532007-07-08 15:40:40 +0000964 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
Steve French60808232006-04-22 15:53:05 +0000965 /* skip . and .. since we added them first */
Steve French790fe572007-07-07 19:25:05 +0000966 if (rc != 0)
Steve French60808232006-04-22 15:53:05 +0000967 return 0;
968
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800969 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700970
971 qstring.name = scratch_buf;
Steve French38702532007-07-08 15:40:40 +0000972 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700973 pCifsF->srch_inf.info_level,
Steve French38702532007-07-08 15:40:40 +0000974 pCifsF->srch_inf.unicode, cifs_sb,
Steve French5bafd762006-06-07 00:18:43 +0000975 max_len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700976 &inum /* returned */);
977
Steve French790fe572007-07-07 19:25:05 +0000978 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 return rc;
980
Jeff Layton132ac7b2009-02-10 07:33:57 -0500981 /* only these two infolevels return valid inode numbers */
982 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX ||
983 pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO)
984 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,
985 &inum);
986 else
987 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,
988 NULL);
989
Steve French790fe572007-07-07 19:25:05 +0000990 if ((tmp_inode == NULL) || (tmp_dentry == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700991 return -ENOMEM;
992
Steve French966ca922005-04-28 22:41:08 -0700993 /* we pass in rc below, indicating whether it is a new inode,
994 so we can figure out whether to invalidate the inode cached
995 data if the file has changed */
Steve French790fe572007-07-07 19:25:05 +0000996 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
Steve French966ca922005-04-28 22:41:08 -0700997 unix_fill_in_inode(tmp_inode,
Steve French5bafd762006-06-07 00:18:43 +0000998 (FILE_UNIX_INFO *)pfindEntry,
999 &obj_type, rc);
Steve French790fe572007-07-07 19:25:05 +00001000 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
Steve French5bafd762006-06-07 00:18:43 +00001001 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
1002 pfindEntry, &obj_type, rc);
1003 else
1004 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
Steve Frenchb835beb2006-09-06 22:02:22 +00001005
Steve French790fe572007-07-07 19:25:05 +00001006 if (rc) /* new inode - needs to be tied to dentry */ {
Steve Frenchb835beb2006-09-06 22:02:22 +00001007 d_instantiate(tmp_dentry, tmp_inode);
Steve French790fe572007-07-07 19:25:05 +00001008 if (rc == 2)
Steve Frenchb835beb2006-09-06 22:02:22 +00001009 d_rehash(tmp_dentry);
1010 }
Steve French50c2f752007-07-13 00:33:32 +00001011
Steve French38702532007-07-08 15:40:40 +00001012
1013 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
1014 tmp_inode->i_ino, obj_type);
Steve French790fe572007-07-07 19:25:05 +00001015 if (rc) {
1016 cFYI(1, ("filldir rc = %d", rc));
Steve French7ca85ba2006-10-30 21:42:57 +00001017 /* we can not return filldir errors to the caller
1018 since they are "normal" when the stat blocksize
1019 is too small - we return remapped error instead */
1020 rc = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 }
1022
1023 dput(tmp_dentry);
1024 return rc;
1025}
1026
Linus Torvalds1da177e2005-04-16 15:20:36 -07001027
1028int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
1029{
1030 int rc = 0;
Steve French38702532007-07-08 15:40:40 +00001031 int xid, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001032 struct cifs_sb_info *cifs_sb;
1033 struct cifsTconInfo *pTcon;
1034 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +00001035 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001036 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +00001037 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +00001038 char *end_of_smb;
Jeff Layton18295792009-04-30 20:45:45 -04001039 unsigned int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040
1041 xid = GetXid();
1042
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001043 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001044 pTcon = cifs_sb->tcon;
Steve French790fe572007-07-07 19:25:05 +00001045 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001046 return -EINVAL;
1047
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048 switch ((int) file->f_pos) {
1049 case 0:
Steve French60808232006-04-22 15:53:05 +00001050 if (filldir(direntry, ".", 1, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001051 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
Steve French60808232006-04-22 15:53:05 +00001052 cERROR(1, ("Filldir for current dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 rc = -ENOMEM;
1054 break;
1055 }
Steve French60808232006-04-22 15:53:05 +00001056 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001057 case 1:
Steve French60808232006-04-22 15:53:05 +00001058 if (filldir(direntry, "..", 2, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001059 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
Steve French26a21b92006-05-31 18:05:34 +00001060 cERROR(1, ("Filldir for parent dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 rc = -ENOMEM;
1062 break;
1063 }
Steve French60808232006-04-22 15:53:05 +00001064 file->f_pos++;
1065 default:
Steve French38702532007-07-08 15:40:40 +00001066 /* 1) If search is active,
1067 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -07001068 if it before then restart search
1069 if after then keep searching till find it */
1070
Steve French790fe572007-07-07 19:25:05 +00001071 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +00001072 rc = initiate_cifs_search(xid, file);
Steve French790fe572007-07-07 19:25:05 +00001073 cFYI(1, ("initiate cifs search rc %d", rc));
1074 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001075 FreeXid(xid);
1076 return rc;
1077 }
1078 }
Steve French790fe572007-07-07 19:25:05 +00001079 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 rc = -EINVAL;
1081 FreeXid(xid);
1082 return rc;
1083 }
1084 cifsFile = file->private_data;
1085 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +00001086 if (cifsFile->srch_inf.emptyDir) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001087 cFYI(1, ("End of search, empty dir"));
1088 rc = 0;
1089 break;
1090 }
1091 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +00001092 cifsFile->invalidHandle = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001093 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001094 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095
Steve French38702532007-07-08 15:40:40 +00001096 rc = find_cifs_entry(xid, pTcon, file,
1097 &current_entry, &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +00001098 if (rc) {
1099 cFYI(1, ("fce error %d", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 goto rddir2_exit;
1101 } else if (current_entry != NULL) {
Steve French790fe572007-07-07 19:25:05 +00001102 cFYI(1, ("entry %lld found", file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 } else {
Steve French790fe572007-07-07 19:25:05 +00001104 cFYI(1, ("could not find entry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 goto rddir2_exit;
1106 }
Steve French790fe572007-07-07 19:25:05 +00001107 cFYI(1, ("loop through %d times filling dir for net buf %p",
1108 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
Steve French5bafd762006-06-07 00:18:43 +00001109 max_len = smbCalcSize((struct smb_hdr *)
1110 cifsFile->srch_inf.ntwrk_buf_start);
1111 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1112
Jeff Laytonf5884162009-04-30 07:18:00 -04001113 tmp_buf = kmalloc(UNICODE_NAME_MAX, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +00001114 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
1115 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001116 /* evaluate whether this case is an error */
Steve French26f57362007-08-30 22:09:15 +00001117 cERROR(1, ("past SMB end, num to fill %d i %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001118 num_to_fill, i));
1119 break;
1120 }
Steve French60808232006-04-22 15:53:05 +00001121 /* if buggy server returns . and .. late do
1122 we want to check for that here? */
Steve French5bafd762006-06-07 00:18:43 +00001123 rc = cifs_filldir(current_entry, file,
1124 filldir, direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +00001125 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +00001126 rc = 0;
1127 break;
1128 }
1129
Linus Torvalds1da177e2005-04-16 15:20:36 -07001130 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +00001131 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +00001132 cifsFile->srch_inf.index_of_last_entry) {
Steve French790fe572007-07-07 19:25:05 +00001133 cFYI(1, ("last entry in buf at pos %lld %s",
1134 file->f_pos, tmp_buf));
1135 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001136 break;
Steve French790fe572007-07-07 19:25:05 +00001137 } else
1138 current_entry =
Steve French5bafd762006-06-07 00:18:43 +00001139 nxt_dir_entry(current_entry, end_of_smb,
1140 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 }
1142 kfree(tmp_buf);
1143 break;
1144 } /* end switch */
1145
1146rddir2_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001147 FreeXid(xid);
1148 return rc;
1149}