blob: c2c01ff4c32c1b21965ebf814ee83a93318c7a31 [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
Steve French39798772006-05-31 22:40:51 +000034#ifdef CONFIG_CIFS_DEBUG2
35static void dump_cifs_file_struct(struct file *file, char *label)
Linus Torvalds1da177e2005-04-16 15:20:36 -070036{
Steve French6dc0f872007-07-06 23:13:06 +000037 struct cifsFileInfo *cf;
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Steve French4523cc32007-04-30 20:13:06 +000039 if (file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 cf = file->private_data;
Steve French4523cc32007-04-30 20:13:06 +000041 if (cf == NULL) {
Steve French6dc0f872007-07-06 23:13:06 +000042 cFYI(1, ("empty cifs private file data"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070043 return;
44 }
Steve Frenchad7a2922008-02-07 23:25:02 +000045 if (cf->invalidHandle)
Steve French6dc0f872007-07-06 23:13:06 +000046 cFYI(1, ("invalid handle"));
Steve Frenchad7a2922008-02-07 23:25:02 +000047 if (cf->srch_inf.endOfSearch)
Steve French6dc0f872007-07-06 23:13:06 +000048 cFYI(1, ("end of search"));
Steve Frenchad7a2922008-02-07 23:25:02 +000049 if (cf->srch_inf.emptyDir)
Steve French6dc0f872007-07-06 23:13:06 +000050 cFYI(1, ("empty dir"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070051 }
Steve French39798772006-05-31 22:40:51 +000052}
Steve French90c81e02008-02-12 20:32:36 +000053#else
54static inline void dump_cifs_file_struct(struct file *file, char *label)
55{
56}
Steve French39798772006-05-31 22:40:51 +000057#endif /* DEBUG2 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070058
Jeff Layton132ac7b2009-02-10 07:33:57 -050059/* Returns 1 if new inode created, 2 if both dentry and inode were */
Linus Torvalds1da177e2005-04-16 15:20:36 -070060/* Might check in the future if inode number changed so we can rehash inode */
Jeff Layton132ac7b2009-02-10 07:33:57 -050061static int
62construct_dentry(struct qstr *qstring, struct file *file,
63 struct inode **ptmp_inode, struct dentry **pnew_dentry,
Jeff Layton950ec522009-02-11 08:08:26 -050064 __u64 *inum)
Linus Torvalds1da177e2005-04-16 15:20:36 -070065{
Jeff Layton132ac7b2009-02-10 07:33:57 -050066 struct dentry *tmp_dentry = NULL;
67 struct super_block *sb = file->f_path.dentry->d_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -070068 int rc = 0;
69
Steve French966ca922005-04-28 22:41:08 -070070 cFYI(1, ("For %s", qstring->name));
Linus Torvalds1da177e2005-04-16 15:20:36 -070071
72 qstring->hash = full_name_hash(qstring->name, qstring->len);
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080073 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 if (tmp_dentry) {
Jeff Layton132ac7b2009-02-10 07:33:57 -050075 /* BB: overwrite old name? i.e. tmp_dentry->d_name and
76 * tmp_dentry->d_name.len??
77 */
Steve French6dc0f872007-07-06 23:13:06 +000078 cFYI(0, ("existing dentry with inode 0x%p",
79 tmp_dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -070080 *ptmp_inode = tmp_dentry->d_inode;
Steve French4523cc32007-04-30 20:13:06 +000081 if (*ptmp_inode == NULL) {
Jeff Layton132ac7b2009-02-10 07:33:57 -050082 *ptmp_inode = cifs_new_inode(sb, inum);
Steve French4523cc32007-04-30 20:13:06 +000083 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070084 return rc;
85 rc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086 }
87 } else {
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080088 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
Steve French4523cc32007-04-30 20:13:06 +000089 if (tmp_dentry == NULL) {
Steve French6dc0f872007-07-06 23:13:06 +000090 cERROR(1, ("Failed allocating dentry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070091 *ptmp_inode = NULL;
92 return rc;
93 }
94
Jeff Layton132ac7b2009-02-10 07:33:57 -050095 if (CIFS_SB(sb)->tcon->nocase)
Steve Frenchb92327f2005-08-22 20:09:43 -070096 tmp_dentry->d_op = &cifs_ci_dentry_ops;
97 else
98 tmp_dentry->d_op = &cifs_dentry_ops;
Jeff Layton132ac7b2009-02-10 07:33:57 -050099
100 *ptmp_inode = cifs_new_inode(sb, inum);
Steve French4523cc32007-04-30 20:13:06 +0000101 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 return rc;
Steve Frenchb835beb2006-09-06 22:02:22 +0000103 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700104 }
105
106 tmp_dentry->d_time = jiffies;
107 *pnew_dentry = tmp_dentry;
108 return rc;
109}
110
Steve French790fe572007-07-07 19:25:05 +0000111static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode)
Steve French533f90a2006-10-12 00:02:32 +0000112{
Steve French4523cc32007-04-30 20:13:06 +0000113 if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
Steve Frenchddae9572006-10-12 01:23:29 +0000114 inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
115 inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
116 inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
Steve French533f90a2006-10-12 00:02:32 +0000117 }
118 return;
119}
120
121
Steve French5bafd762006-06-07 00:18:43 +0000122static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
Steve French2c2130e2007-10-12 19:10:28 +0000123 char *buf, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700124{
Steve French966ca922005-04-28 22:41:08 -0700125 loff_t local_size;
126 struct timespec local_mtime;
127
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
129 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
Steve French5bafd762006-06-07 00:18:43 +0000130 __u32 attr;
131 __u64 allocation_size;
132 __u64 end_of_file;
Jeff Layton4468eb32008-05-22 09:31:40 -0400133 umode_t default_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Steve French966ca922005-04-28 22:41:08 -0700135 /* save mtime and size */
136 local_mtime = tmp_inode->i_mtime;
137 local_size = tmp_inode->i_size;
138
Steve French4523cc32007-04-30 20:13:06 +0000139 if (new_buf_type) {
Steve French5bafd762006-06-07 00:18:43 +0000140 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
141
142 attr = le32_to_cpu(pfindData->ExtFileAttributes);
143 allocation_size = le64_to_cpu(pfindData->AllocationSize);
144 end_of_file = le64_to_cpu(pfindData->EndOfFile);
145 tmp_inode->i_atime =
146 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
147 tmp_inode->i_mtime =
148 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
149 tmp_inode->i_ctime =
150 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
151 } else { /* legacy, OS2 and DOS style */
Steve French1bd5bbc2006-09-28 03:35:57 +0000152/* struct timespec ts;*/
Steve Frenchad7a2922008-02-07 23:25:02 +0000153 FIND_FILE_STANDARD_INFO *pfindData =
Steve French5bafd762006-06-07 00:18:43 +0000154 (FIND_FILE_STANDARD_INFO *)buf;
155
Steve French268f3be2006-10-06 21:47:09 +0000156 tmp_inode->i_mtime = cnvrtDosUnixTm(
Steve French1bd5bbc2006-09-28 03:35:57 +0000157 le16_to_cpu(pfindData->LastWriteDate),
Steve French268f3be2006-10-06 21:47:09 +0000158 le16_to_cpu(pfindData->LastWriteTime));
159 tmp_inode->i_atime = cnvrtDosUnixTm(
160 le16_to_cpu(pfindData->LastAccessDate),
161 le16_to_cpu(pfindData->LastAccessTime));
Steve Frencha8507902007-02-06 20:43:30 +0000162 tmp_inode->i_ctime = cnvrtDosUnixTm(
163 le16_to_cpu(pfindData->LastWriteDate),
164 le16_to_cpu(pfindData->LastWriteTime));
Steve French533f90a2006-10-12 00:02:32 +0000165 AdjustForTZ(cifs_sb->tcon, tmp_inode);
Steve French5bafd762006-06-07 00:18:43 +0000166 attr = le16_to_cpu(pfindData->Attributes);
167 allocation_size = le32_to_cpu(pfindData->AllocationSize);
168 end_of_file = le32_to_cpu(pfindData->DataSize);
Steve French5bafd762006-06-07 00:18:43 +0000169 }
170
Linus Torvalds1da177e2005-04-16 15:20:36 -0700171 /* Linux can not store file creation time unfortunately so ignore it */
Steve French5bafd762006-06-07 00:18:43 +0000172
173 cifsInfo->cifsAttrs = attr;
Steve Frencha6f8de32007-11-08 23:10:32 +0000174#ifdef CONFIG_CIFS_EXPERIMENTAL
175 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
176 /* get more accurate mode via ACL - so force inode refresh */
177 cifsInfo->time = 0;
178 } else
179#endif /* CONFIG_CIFS_EXPERIMENTAL */
180 cifsInfo->time = jiffies;
Steve French5bafd762006-06-07 00:18:43 +0000181
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
183 /* 2767 perms - indicate mandatory locking */
Steve French790fe572007-07-07 19:25:05 +0000184 /* BB fill in uid and gid here? with help from winbind?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 or retrieve from NTFS stream extended attribute */
186 if (atomic_read(&cifsInfo->inUse) == 0) {
187 tmp_inode->i_uid = cifs_sb->mnt_uid;
188 tmp_inode->i_gid = cifs_sb->mnt_gid;
Jeff Layton4468eb32008-05-22 09:31:40 -0400189 }
190
191 if (attr & ATTR_DIRECTORY)
192 default_mode = cifs_sb->mnt_dir_mode;
193 else
194 default_mode = cifs_sb->mnt_file_mode;
195
196 /* set initial permissions */
197 if ((atomic_read(&cifsInfo->inUse) == 0) ||
198 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
199 tmp_inode->i_mode = default_mode;
200 else {
201 /* just reenable write bits if !ATTR_READONLY */
202 if ((tmp_inode->i_mode & S_IWUGO) == 0 &&
203 (attr & ATTR_READONLY) == 0)
204 tmp_inode->i_mode |= (S_IWUGO & default_mode);
205
Steve French3020a1f2005-11-18 11:31:10 -0800206 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 }
208
Jeff Layton4468eb32008-05-22 09:31:40 -0400209 /* clear write bits if ATTR_READONLY is set */
210 if (attr & ATTR_READONLY)
211 tmp_inode->i_mode &= ~S_IWUGO;
212
213 /* set inode type */
214 if ((attr & ATTR_SYSTEM) &&
215 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
Steve French3020a1f2005-11-18 11:31:10 -0800216 if (end_of_file == 0) {
Steve French3020a1f2005-11-18 11:31:10 -0800217 tmp_inode->i_mode |= S_IFIFO;
Jeff Layton4468eb32008-05-22 09:31:40 -0400218 *pobject_type = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800219 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400220 /*
221 * trying to get the type can be slow, so just call
222 * this a regular file for now, and mark for reval
223 */
Steve French790fe572007-07-07 19:25:05 +0000224 tmp_inode->i_mode |= S_IFREG;
Jeff Layton4468eb32008-05-22 09:31:40 -0400225 *pobject_type = DT_REG;
Steve French790fe572007-07-07 19:25:05 +0000226 cifsInfo->time = 0;
Steve French3020a1f2005-11-18 11:31:10 -0800227 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400229 if (attr & ATTR_DIRECTORY) {
230 tmp_inode->i_mode |= S_IFDIR;
231 *pobject_type = DT_DIR;
232 } else {
233 tmp_inode->i_mode |= S_IFREG;
234 *pobject_type = DT_REG;
235 }
236 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237
238 /* can not fill in nlink here as in qpathinfo version and Unx search */
Steve Frenchad7a2922008-02-07 23:25:02 +0000239 if (atomic_read(&cifsInfo->inUse) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 atomic_set(&cifsInfo->inUse, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241
Steve French3677db12007-02-26 16:46:11 +0000242 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000243 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000244 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245 client is writing to it due to potential races */
246 i_size_write(tmp_inode, end_of_file);
247
248 /* 512 bytes (2**9) is the fake blocksize that must be used */
249 /* for this calculation, even though the reported blocksize is larger */
250 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
251 }
Steve French3677db12007-02-26 16:46:11 +0000252 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700253
254 if (allocation_size < end_of_file)
255 cFYI(1, ("May be sparse file, allocation less than file size"));
Theodore Ts'oba52de12006-09-27 01:50:49 -0700256 cFYI(1, ("File Size %ld and blocks %llu",
Andrew Morton5515eff2006-03-26 01:37:53 -0800257 (unsigned long)tmp_inode->i_size,
Theodore Ts'oba52de12006-09-27 01:50:49 -0700258 (unsigned long long)tmp_inode->i_blocks));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 if (S_ISREG(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700260 cFYI(1, ("File inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 tmp_inode->i_op = &cifs_file_inode_ops;
Steve French4523cc32007-04-30 20:13:06 +0000262 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
263 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800264 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
265 else
266 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000267 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800268 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700269 else
270 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800271
Steve French4523cc32007-04-30 20:13:06 +0000272 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve Frenchbfa0d752005-08-31 21:50:37 -0700273 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000274 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
275 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
276 else
277 tmp_inode->i_data.a_ops = &cifs_addr_ops;
278
Steve French4523cc32007-04-30 20:13:06 +0000279 if (isNewInode)
Steve Frenchdfb75332005-06-22 17:13:47 -0700280 return; /* No sense invalidating pages for new inode
281 since have not started caching readahead file
282 data yet */
Steve French966ca922005-04-28 22:41:08 -0700283
284 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
285 (local_size == tmp_inode->i_size)) {
286 cFYI(1, ("inode exists but unchanged"));
287 } else {
288 /* file may have changed on server */
289 cFYI(1, ("invalidate inode, readdir detected change"));
290 invalidate_remote_inode(tmp_inode);
291 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292 } else if (S_ISDIR(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700293 cFYI(1, ("Directory inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 tmp_inode->i_op = &cifs_dir_inode_ops;
295 tmp_inode->i_fop = &cifs_dir_ops;
296 } else if (S_ISLNK(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700297 cFYI(1, ("Symbolic Link inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700298 tmp_inode->i_op = &cifs_symlink_inode_ops;
299 } else {
Steve French966ca922005-04-28 22:41:08 -0700300 cFYI(1, ("Init special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700301 init_special_inode(tmp_inode, tmp_inode->i_mode,
302 tmp_inode->i_rdev);
303 }
304}
305
306static void unix_fill_in_inode(struct inode *tmp_inode,
Steve French2c2130e2007-10-12 19:10:28 +0000307 FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308{
Steve French966ca922005-04-28 22:41:08 -0700309 loff_t local_size;
310 struct timespec local_mtime;
311
Linus Torvalds1da177e2005-04-16 15:20:36 -0700312 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
313 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
314
315 __u32 type = le32_to_cpu(pfindData->Type);
316 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
317 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
318 cifsInfo->time = jiffies;
319 atomic_inc(&cifsInfo->inUse);
320
Steve French966ca922005-04-28 22:41:08 -0700321 /* save mtime and size */
322 local_mtime = tmp_inode->i_mtime;
323 local_size = tmp_inode->i_size;
324
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 tmp_inode->i_atime =
326 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
327 tmp_inode->i_mtime =
328 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
329 tmp_inode->i_ctime =
330 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
331
332 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
Steve French3020a1f2005-11-18 11:31:10 -0800333 /* since we set the inode type below we need to mask off type
Steve French790fe572007-07-07 19:25:05 +0000334 to avoid strange results if bits above were corrupt */
335 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700336 if (type == UNIX_FILE) {
337 *pobject_type = DT_REG;
338 tmp_inode->i_mode |= S_IFREG;
339 } else if (type == UNIX_SYMLINK) {
340 *pobject_type = DT_LNK;
341 tmp_inode->i_mode |= S_IFLNK;
342 } else if (type == UNIX_DIR) {
343 *pobject_type = DT_DIR;
344 tmp_inode->i_mode |= S_IFDIR;
345 } else if (type == UNIX_CHARDEV) {
346 *pobject_type = DT_CHR;
347 tmp_inode->i_mode |= S_IFCHR;
348 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
349 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
350 } else if (type == UNIX_BLOCKDEV) {
351 *pobject_type = DT_BLK;
352 tmp_inode->i_mode |= S_IFBLK;
353 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
354 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
355 } else if (type == UNIX_FIFO) {
356 *pobject_type = DT_FIFO;
357 tmp_inode->i_mode |= S_IFIFO;
358 } else if (type == UNIX_SOCKET) {
359 *pobject_type = DT_SOCK;
360 tmp_inode->i_mode |= S_IFSOCK;
Steve French3020a1f2005-11-18 11:31:10 -0800361 } else {
362 /* safest to just call it a file */
363 *pobject_type = DT_REG;
364 tmp_inode->i_mode |= S_IFREG;
Steve French790fe572007-07-07 19:25:05 +0000365 cFYI(1, ("unknown inode type %d", type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700366 }
367
Steve French4523cc32007-04-30 20:13:06 +0000368 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
369 tmp_inode->i_uid = cifs_sb->mnt_uid;
370 else
371 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
372 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
373 tmp_inode->i_gid = cifs_sb->mnt_gid;
374 else
375 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700376 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
377
Steve French3677db12007-02-26 16:46:11 +0000378 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000379 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000380 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 client is writing to it due to potential races */
Steve French7ba52632007-02-08 18:14:13 +0000382 i_size_write(tmp_inode, end_of_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384 /* 512 bytes (2**9) is the fake blocksize that must be used */
385 /* for this calculation, not the real blocksize */
386 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
387 }
Steve French3677db12007-02-26 16:46:11 +0000388 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389
390 if (S_ISREG(tmp_inode->i_mode)) {
391 cFYI(1, ("File inode"));
392 tmp_inode->i_op = &cifs_file_inode_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800393
Steve French4523cc32007-04-30 20:13:06 +0000394 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
395 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800396 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
397 else
398 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000399 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800400 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700401 else
402 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800403
Steve French4523cc32007-04-30 20:13:06 +0000404 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve French790fe572007-07-07 19:25:05 +0000405 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000406 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
407 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
408 else
409 tmp_inode->i_data.a_ops = &cifs_addr_ops;
Steve French966ca922005-04-28 22:41:08 -0700410
Steve French4523cc32007-04-30 20:13:06 +0000411 if (isNewInode)
Steve French790fe572007-07-07 19:25:05 +0000412 return; /* No sense invalidating pages for new inode
413 since we have not started caching readahead
414 file data for it yet */
Steve French966ca922005-04-28 22:41:08 -0700415
416 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
417 (local_size == tmp_inode->i_size)) {
418 cFYI(1, ("inode exists but unchanged"));
419 } else {
420 /* file may have changed on server */
421 cFYI(1, ("invalidate inode, readdir detected change"));
422 invalidate_remote_inode(tmp_inode);
423 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424 } else if (S_ISDIR(tmp_inode->i_mode)) {
425 cFYI(1, ("Directory inode"));
426 tmp_inode->i_op = &cifs_dir_inode_ops;
427 tmp_inode->i_fop = &cifs_dir_ops;
428 } else if (S_ISLNK(tmp_inode->i_mode)) {
429 cFYI(1, ("Symbolic Link inode"));
430 tmp_inode->i_op = &cifs_symlink_inode_ops;
431/* tmp_inode->i_fop = *//* do not need to set to anything */
432 } else {
Steve French790fe572007-07-07 19:25:05 +0000433 cFYI(1, ("Special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700434 init_special_inode(tmp_inode, tmp_inode->i_mode,
435 tmp_inode->i_rdev);
436 }
437}
438
439static int initiate_cifs_search(const int xid, struct file *file)
440{
441 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000442 char *full_path;
443 struct cifsFileInfo *cifsFile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 struct cifs_sb_info *cifs_sb;
445 struct cifsTconInfo *pTcon;
446
Steve French4523cc32007-04-30 20:13:06 +0000447 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +0000448 file->private_data =
449 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700450 }
451
Steve French4523cc32007-04-30 20:13:06 +0000452 if (file->private_data == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700453 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454 cifsFile = file->private_data;
Steve French4b18f2a2008-04-29 00:06:05 +0000455 cifsFile->invalidHandle = true;
456 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700457
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800458 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Steve French4523cc32007-04-30 20:13:06 +0000459 if (cifs_sb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700460 return -EINVAL;
461
462 pTcon = cifs_sb->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000463 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700464 return -EINVAL;
465
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800466 full_path = build_path_from_dentry(file->f_path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700467
Steve Frenchad7a2922008-02-07 23:25:02 +0000468 if (full_path == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700470
Steve French966ca922005-04-28 22:41:08 -0700471 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Steve French75cf6bd2005-04-28 22:41:04 -0700473ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000475 /* but now check for them on the share/mount not on the SMB session */
476/* if (pTcon->ses->capabilities & CAP_UNIX) { */
Steve Frenchad7a2922008-02-07 23:25:02 +0000477 if (pTcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000478 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Steve Frenchad7a2922008-02-07 23:25:02 +0000479 else if ((pTcon->ses->capabilities &
Steve French5bafd762006-06-07 00:18:43 +0000480 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
481 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700482 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
483 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
484 } else /* not srvinos - BB fixme add check for backlevel? */ {
485 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
486 }
487
Steve French38702532007-07-08 15:40:40 +0000488 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700489 &cifsFile->netfid, &cifsFile->srch_inf,
Steve French38702532007-07-08 15:40:40 +0000490 cifs_sb->mnt_cifs_flags &
Steve Frencheafe8702005-09-15 21:47:30 -0700491 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
Steve French4523cc32007-04-30 20:13:06 +0000492 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000493 cifsFile->invalidHandle = false;
Steve French38702532007-07-08 15:40:40 +0000494 if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700495 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
496 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
497 goto ffirst_retry;
498 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700499 kfree(full_path);
500 return rc;
501}
502
503/* return length of unicode string in bytes */
504static int cifs_unicode_bytelen(char *str)
505{
506 int len;
Steve French63d25832007-11-05 21:46:10 +0000507 __le16 *ustr = (__le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508
Steve French38702532007-07-08 15:40:40 +0000509 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000510 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700511 return len << 1;
512 }
Steve French790fe572007-07-07 19:25:05 +0000513 cFYI(1, ("Unicode string longer than PATH_MAX found"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700514 return len << 1;
515}
516
Steve French5bafd762006-06-07 00:18:43 +0000517static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700518{
Steve French38702532007-07-08 15:40:40 +0000519 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000520 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700521
Steve French4523cc32007-04-30 20:13:06 +0000522 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000523 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000524 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
525
526 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
527 pfData->FileNameLength;
528 } else
529 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Steve French790fe572007-07-07 19:25:05 +0000530 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700531 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000532 if (new_entry >= end_of_smb) {
Steve French09d1db52005-04-28 22:41:08 -0700533 cERROR(1,
534 ("search entry %p began after end of SMB %p old entry %p",
Steve French38702532007-07-08 15:40:40 +0000535 new_entry, end_of_smb, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700536 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000537 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000538 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
539 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000540 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Steve French38702532007-07-08 15:40:40 +0000541 cERROR(1, ("search entry %p extends after end of SMB %p",
Steve French09d1db52005-04-28 22:41:08 -0700542 new_entry, end_of_smb));
543 return NULL;
Steve French38702532007-07-08 15:40:40 +0000544 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700545 return new_entry;
546
547}
548
549#define UNICODE_DOT cpu_to_le16(0x2e)
550
551/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
552static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
553{
554 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000555 char *filename = NULL;
556 int len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700557
Steve French4523cc32007-04-30 20:13:06 +0000558 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000559 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700560 filename = &pFindData->FileName[0];
Steve French4523cc32007-04-30 20:13:06 +0000561 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 len = cifs_unicode_bytelen(filename);
563 } else {
564 /* BB should we make this strnlen of PATH_MAX? */
565 len = strnlen(filename, 5);
566 }
Steve French4523cc32007-04-30 20:13:06 +0000567 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000568 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700569 (FILE_DIRECTORY_INFO *)current_entry;
570 filename = &pFindData->FileName[0];
571 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000572 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000573 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000574 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700575 (FILE_FULL_DIRECTORY_INFO *)current_entry;
576 filename = &pFindData->FileName[0];
577 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000578 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000579 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000580 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700581 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
582 filename = &pFindData->FileName[0];
583 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000584 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000585 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000586 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700587 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
588 filename = &pFindData->FileName[0];
589 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000590 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000591 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000592 (FIND_FILE_STANDARD_INFO *)current_entry;
593 filename = &pFindData->FileName[0];
Steve French5ddaa682006-08-15 13:35:48 +0000594 len = pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700595 } else {
Steve French790fe572007-07-07 19:25:05 +0000596 cFYI(1, ("Unknown findfirst level %d",
597 cfile->srch_inf.info_level));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700598 }
599
Steve French4523cc32007-04-30 20:13:06 +0000600 if (filename) {
601 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700602 __le16 *ufilename = (__le16 *)filename;
Steve French4523cc32007-04-30 20:13:06 +0000603 if (len == 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 /* check for . */
Steve French4523cc32007-04-30 20:13:06 +0000605 if (ufilename[0] == UNICODE_DOT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000607 } else if (len == 4) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 /* check for .. */
Steve French4523cc32007-04-30 20:13:06 +0000609 if ((ufilename[0] == UNICODE_DOT)
Steve French38702532007-07-08 15:40:40 +0000610 && (ufilename[1] == UNICODE_DOT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700611 rc = 2;
612 }
613 } else /* ASCII */ {
Steve French4523cc32007-04-30 20:13:06 +0000614 if (len == 1) {
Steve French38702532007-07-08 15:40:40 +0000615 if (filename[0] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700616 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000617 } else if (len == 2) {
Steve French790fe572007-07-07 19:25:05 +0000618 if ((filename[0] == '.') && (filename[1] == '.'))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700619 rc = 2;
620 }
621 }
622 }
623
624 return rc;
625}
626
Steve Frencheafe8702005-09-15 21:47:30 -0700627/* Check if directory that we are searching has changed so we can decide
628 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000629static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700630{
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000631 struct inode *inode = file->f_path.dentry->d_inode;
632 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700633
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000634 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700635 return 1; /* directory was changed, perhaps due to unlink */
636 else
637 return 0;
638
639}
640
Steve French0752f152008-10-07 20:03:33 +0000641static int cifs_save_resume_key(const char *current_entry,
642 struct cifsFileInfo *cifsFile)
643{
644 int rc = 0;
645 unsigned int len = 0;
646 __u16 level;
647 char *filename;
648
649 if ((cifsFile == NULL) || (current_entry == NULL))
650 return -EINVAL;
651
652 level = cifsFile->srch_inf.info_level;
653
654 if (level == SMB_FIND_FILE_UNIX) {
655 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
656
657 filename = &pFindData->FileName[0];
658 if (cifsFile->srch_inf.unicode) {
659 len = cifs_unicode_bytelen(filename);
660 } else {
661 /* BB should we make this strnlen of PATH_MAX? */
662 len = strnlen(filename, PATH_MAX);
663 }
664 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
665 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
666 FILE_DIRECTORY_INFO *pFindData =
667 (FILE_DIRECTORY_INFO *)current_entry;
668 filename = &pFindData->FileName[0];
669 len = le32_to_cpu(pFindData->FileNameLength);
670 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
671 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
672 FILE_FULL_DIRECTORY_INFO *pFindData =
673 (FILE_FULL_DIRECTORY_INFO *)current_entry;
674 filename = &pFindData->FileName[0];
675 len = le32_to_cpu(pFindData->FileNameLength);
676 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
677 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
678 SEARCH_ID_FULL_DIR_INFO *pFindData =
679 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
680 filename = &pFindData->FileName[0];
681 len = le32_to_cpu(pFindData->FileNameLength);
682 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
683 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
684 FILE_BOTH_DIRECTORY_INFO *pFindData =
685 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
686 filename = &pFindData->FileName[0];
687 len = le32_to_cpu(pFindData->FileNameLength);
688 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
689 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
690 FIND_FILE_STANDARD_INFO *pFindData =
691 (FIND_FILE_STANDARD_INFO *)current_entry;
692 filename = &pFindData->FileName[0];
693 /* one byte length, no name conversion */
694 len = (unsigned int)pFindData->FileNameLength;
695 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
696 } else {
697 cFYI(1, ("Unknown findfirst level %d", level));
698 return -EINVAL;
699 }
700 cifsFile->srch_inf.resume_name_len = len;
701 cifsFile->srch_inf.presume_name = filename;
702 return rc;
703}
704
Linus Torvalds1da177e2005-04-16 15:20:36 -0700705/* find the corresponding entry in the search */
706/* Note that the SMB server returns search entries for . and .. which
707 complicates logic here if we choose to parse for them and we do not
708 assume that they are located in the findfirst return buffer.*/
709/* We start counting in the buffer with entry 2 and increment for every
710 entry (do not increment for . or .. entry) */
711static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
Steve French38702532007-07-08 15:40:40 +0000712 struct file *file, char **ppCurrentEntry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700713{
714 int rc = 0;
715 int pos_in_buf = 0;
716 loff_t first_entry_in_buffer;
717 loff_t index_to_find = file->f_pos;
Steve French38702532007-07-08 15:40:40 +0000718 struct cifsFileInfo *cifsFile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000720
Steve French38702532007-07-08 15:40:40 +0000721 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700722 (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700723 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 *ppCurrentEntry = NULL;
Steve French38702532007-07-08 15:40:40 +0000726 first_entry_in_buffer =
727 cifsFile->srch_inf.index_of_last_entry -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728 cifsFile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000729
730 /* if first entry in buf is zero then is first buffer
731 in search response data which means it is likely . and ..
732 will be in this buffer, although some servers do not return
733 . and .. for the root of a drive and for those we need
734 to start two entries earlier */
735
Steve French39798772006-05-31 22:40:51 +0000736 dump_cifs_file_struct(file, "In fce ");
Steve French38702532007-07-08 15:40:40 +0000737 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
738 is_dir_changed(file)) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700739 (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700740 /* close and restart search */
Steve French790fe572007-07-07 19:25:05 +0000741 cFYI(1, ("search backing up - close and restart search"));
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000742 write_lock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000743 if (!cifsFile->srch_inf.endOfSearch &&
744 !cifsFile->invalidHandle) {
745 cifsFile->invalidHandle = true;
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000746 write_unlock(&GlobalSMBSeslock);
Steve French77c57ec2008-05-13 21:39:32 +0000747 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchddb4cbf2008-11-20 20:00:44 +0000748 } else
749 write_unlock(&GlobalSMBSeslock);
Steve French4523cc32007-04-30 20:13:06 +0000750 if (cifsFile->srch_inf.ntwrk_buf_start) {
Steve French790fe572007-07-07 19:25:05 +0000751 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
Steve French4523cc32007-04-30 20:13:06 +0000752 if (cifsFile->srch_inf.smallBuf)
Steve Frenchd47d7c12006-02-28 03:45:48 +0000753 cifs_small_buf_release(cifsFile->srch_inf.
754 ntwrk_buf_start);
755 else
756 cifs_buf_release(cifsFile->srch_inf.
757 ntwrk_buf_start);
Shirish Pargaonkar76c510a2008-07-24 14:48:33 +0000758 cifsFile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700759 }
Steve French38702532007-07-08 15:40:40 +0000760 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000761 if (rc) {
Steve French790fe572007-07-07 19:25:05 +0000762 cFYI(1, ("error %d reinitiating a search on rewind",
763 rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700764 return rc;
765 }
Jeff Laytona364bc02008-10-21 14:42:13 +0000766 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700767 }
768
Steve French38702532007-07-08 15:40:40 +0000769 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
Steve French4b18f2a2008-04-29 00:06:05 +0000770 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000771 cFYI(1, ("calling findnext2"));
Steve French38702532007-07-08 15:40:40 +0000772 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
Steve Frenchdfb75332005-06-22 17:13:47 -0700773 &cifsFile->srch_inf);
Jeff Laytona364bc02008-10-21 14:42:13 +0000774 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Steve French4523cc32007-04-30 20:13:06 +0000775 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700776 return -ENOENT;
777 }
Steve French4523cc32007-04-30 20:13:06 +0000778 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700779 /* we found the buffer that contains the entry */
780 /* scan and find it */
781 int i;
Steve French38702532007-07-08 15:40:40 +0000782 char *current_entry;
783 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700784 smbCalcSize((struct smb_hdr *)
785 cifsFile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000786
787 current_entry = cifsFile->srch_inf.srch_entries_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700788 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
789 - cifsFile->srch_inf.entries_in_buffer;
790 pos_in_buf = index_to_find - first_entry_in_buffer;
Steve French790fe572007-07-07 19:25:05 +0000791 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
Steve French5bafd762006-06-07 00:18:43 +0000792
Steve Frenchad7a2922008-02-07 23:25:02 +0000793 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700794 /* go entry by entry figuring out which is first */
Steve French38702532007-07-08 15:40:40 +0000795 current_entry = nxt_dir_entry(current_entry, end_of_smb,
Steve French5bafd762006-06-07 00:18:43 +0000796 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 }
Steve French790fe572007-07-07 19:25:05 +0000798 if ((current_entry == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 /* BB fixme - check if we should flag this error */
Steve French38702532007-07-08 15:40:40 +0000800 cERROR(1, ("reached end of buf searching for pos in buf"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 " %d index to find %lld rc %d",
Steve French38702532007-07-08 15:40:40 +0000802 pos_in_buf, index_to_find, rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700803 }
804 rc = 0;
805 *ppCurrentEntry = current_entry;
806 } else {
Steve French790fe572007-07-07 19:25:05 +0000807 cFYI(1, ("index not in buffer - could not findnext into it"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700808 return 0;
809 }
810
Steve French790fe572007-07-07 19:25:05 +0000811 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
812 cFYI(1, ("can not return entries pos_in_buf beyond last"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700813 *num_to_ret = 0;
814 } else
815 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700816
817 return rc;
818}
819
820/* inode num, inode type and filename returned */
821static int cifs_get_name_from_search_buf(struct qstr *pqst,
822 char *current_entry, __u16 level, unsigned int unicode,
Jeff Layton950ec522009-02-11 08:08:26 -0500823 struct cifs_sb_info *cifs_sb, int max_len, __u64 *pinum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700824{
825 int rc = 0;
826 unsigned int len = 0;
Steve French38702532007-07-08 15:40:40 +0000827 char *filename;
828 struct nls_table *nlt = cifs_sb->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700829
830 *pinum = 0;
831
Steve French790fe572007-07-07 19:25:05 +0000832 if (level == SMB_FIND_FILE_UNIX) {
Steve French38702532007-07-08 15:40:40 +0000833 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700834
835 filename = &pFindData->FileName[0];
Steve French790fe572007-07-07 19:25:05 +0000836 if (unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700837 len = cifs_unicode_bytelen(filename);
838 } else {
839 /* BB should we make this strnlen of PATH_MAX? */
840 len = strnlen(filename, PATH_MAX);
841 }
842
Jeff Layton132ac7b2009-02-10 07:33:57 -0500843 *pinum = pFindData->UniqueId;
Steve French790fe572007-07-07 19:25:05 +0000844 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000845 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700846 (FILE_DIRECTORY_INFO *)current_entry;
847 filename = &pFindData->FileName[0];
848 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000849 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000850 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700851 (FILE_FULL_DIRECTORY_INFO *)current_entry;
852 filename = &pFindData->FileName[0];
853 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000854 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve French38702532007-07-08 15:40:40 +0000855 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700856 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
857 filename = &pFindData->FileName[0];
858 len = le32_to_cpu(pFindData->FileNameLength);
859 *pinum = pFindData->UniqueId;
Steve French790fe572007-07-07 19:25:05 +0000860 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve French38702532007-07-08 15:40:40 +0000861 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700862 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
863 filename = &pFindData->FileName[0];
864 len = le32_to_cpu(pFindData->FileNameLength);
Steve French790fe572007-07-07 19:25:05 +0000865 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000866 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000867 (FIND_FILE_STANDARD_INFO *)current_entry;
868 filename = &pFindData->FileName[0];
869 /* one byte length, no name conversion */
870 len = (unsigned int)pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700871 } else {
Steve French790fe572007-07-07 19:25:05 +0000872 cFYI(1, ("Unknown findfirst level %d", level));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700873 return -EINVAL;
874 }
Steve French5bafd762006-06-07 00:18:43 +0000875
Steve French790fe572007-07-07 19:25:05 +0000876 if (len > max_len) {
Steve French38702532007-07-08 15:40:40 +0000877 cERROR(1, ("bad search response length %d past smb end", len));
Steve French5bafd762006-06-07 00:18:43 +0000878 return -EINVAL;
879 }
880
Steve French790fe572007-07-07 19:25:05 +0000881 if (unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700882 /* BB fixme - test with long names */
883 /* Note converted filename can be longer than in unicode */
Steve French790fe572007-07-07 19:25:05 +0000884 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
Steve French6a0b4822005-04-28 22:41:05 -0700885 pqst->len = cifs_convertUCSpath((char *)pqst->name,
886 (__le16 *)filename, len/2, nlt);
887 else
Steve French6a0b4822005-04-28 22:41:05 -0700888 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
Steve French38702532007-07-08 15:40:40 +0000889 (__le16 *)filename, len/2, nlt);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890 } else {
891 pqst->name = filename;
892 pqst->len = len;
893 }
Steve French38702532007-07-08 15:40:40 +0000894 pqst->hash = full_name_hash(pqst->name, pqst->len);
Steve French790fe572007-07-07 19:25:05 +0000895/* cFYI(1, ("filldir on %s",pqst->name)); */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 return rc;
897}
898
899static int cifs_filldir(char *pfindEntry, struct file *file,
Steve French5bafd762006-06-07 00:18:43 +0000900 filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700901{
902 int rc = 0;
903 struct qstr qstring;
Steve French38702532007-07-08 15:40:40 +0000904 struct cifsFileInfo *pCifsF;
Steve French2c2130e2007-10-12 19:10:28 +0000905 unsigned int obj_type;
Jeff Layton950ec522009-02-11 08:08:26 -0500906 __u64 inum;
Steve French38702532007-07-08 15:40:40 +0000907 struct cifs_sb_info *cifs_sb;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700908 struct inode *tmp_inode;
909 struct dentry *tmp_dentry;
910
911 /* get filename and len into qstring */
912 /* get dentry */
913 /* decide whether to create and populate ionde */
Steve French790fe572007-07-07 19:25:05 +0000914 if ((direntry == NULL) || (file == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700915 return -EINVAL;
916
917 pCifsF = file->private_data;
Steve French50c2f752007-07-13 00:33:32 +0000918
Steve French790fe572007-07-07 19:25:05 +0000919 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 return -ENOENT;
921
Steve French38702532007-07-08 15:40:40 +0000922 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
Steve French60808232006-04-22 15:53:05 +0000923 /* skip . and .. since we added them first */
Steve French790fe572007-07-07 19:25:05 +0000924 if (rc != 0)
Steve French60808232006-04-22 15:53:05 +0000925 return 0;
926
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800927 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700928
929 qstring.name = scratch_buf;
Steve French38702532007-07-08 15:40:40 +0000930 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700931 pCifsF->srch_inf.info_level,
Steve French38702532007-07-08 15:40:40 +0000932 pCifsF->srch_inf.unicode, cifs_sb,
Steve French5bafd762006-06-07 00:18:43 +0000933 max_len,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700934 &inum /* returned */);
935
Steve French790fe572007-07-07 19:25:05 +0000936 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700937 return rc;
938
Jeff Layton132ac7b2009-02-10 07:33:57 -0500939 /* only these two infolevels return valid inode numbers */
940 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX ||
941 pCifsF->srch_inf.info_level == SMB_FIND_FILE_ID_FULL_DIR_INFO)
942 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,
943 &inum);
944 else
945 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry,
946 NULL);
947
Steve French790fe572007-07-07 19:25:05 +0000948 if ((tmp_inode == NULL) || (tmp_dentry == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700949 return -ENOMEM;
950
Steve French966ca922005-04-28 22:41:08 -0700951 /* we pass in rc below, indicating whether it is a new inode,
952 so we can figure out whether to invalidate the inode cached
953 data if the file has changed */
Steve French790fe572007-07-07 19:25:05 +0000954 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
Steve French966ca922005-04-28 22:41:08 -0700955 unix_fill_in_inode(tmp_inode,
Steve French5bafd762006-06-07 00:18:43 +0000956 (FILE_UNIX_INFO *)pfindEntry,
957 &obj_type, rc);
Steve French790fe572007-07-07 19:25:05 +0000958 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
Steve French5bafd762006-06-07 00:18:43 +0000959 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
960 pfindEntry, &obj_type, rc);
961 else
962 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
Steve Frenchb835beb2006-09-06 22:02:22 +0000963
Steve French790fe572007-07-07 19:25:05 +0000964 if (rc) /* new inode - needs to be tied to dentry */ {
Steve Frenchb835beb2006-09-06 22:02:22 +0000965 d_instantiate(tmp_dentry, tmp_inode);
Steve French790fe572007-07-07 19:25:05 +0000966 if (rc == 2)
Steve Frenchb835beb2006-09-06 22:02:22 +0000967 d_rehash(tmp_dentry);
968 }
Steve French50c2f752007-07-13 00:33:32 +0000969
Steve French38702532007-07-08 15:40:40 +0000970
971 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
972 tmp_inode->i_ino, obj_type);
Steve French790fe572007-07-07 19:25:05 +0000973 if (rc) {
974 cFYI(1, ("filldir rc = %d", rc));
Steve French7ca85ba2006-10-30 21:42:57 +0000975 /* we can not return filldir errors to the caller
976 since they are "normal" when the stat blocksize
977 is too small - we return remapped error instead */
978 rc = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700979 }
980
981 dput(tmp_dentry);
982 return rc;
983}
984
Linus Torvalds1da177e2005-04-16 15:20:36 -0700985
986int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
987{
988 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000989 int xid, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700990 struct cifs_sb_info *cifs_sb;
991 struct cifsTconInfo *pTcon;
992 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000993 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700994 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000995 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000996 char *end_of_smb;
Steve French5bafd762006-06-07 00:18:43 +0000997 int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700998
999 xid = GetXid();
1000
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001001 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001002 pTcon = cifs_sb->tcon;
Steve French790fe572007-07-07 19:25:05 +00001003 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 return -EINVAL;
1005
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 switch ((int) file->f_pos) {
1007 case 0:
Steve French60808232006-04-22 15:53:05 +00001008 if (filldir(direntry, ".", 1, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001009 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
Steve French60808232006-04-22 15:53:05 +00001010 cERROR(1, ("Filldir for current dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001011 rc = -ENOMEM;
1012 break;
1013 }
Steve French60808232006-04-22 15:53:05 +00001014 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001015 case 1:
Steve French60808232006-04-22 15:53:05 +00001016 if (filldir(direntry, "..", 2, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001017 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
Steve French26a21b92006-05-31 18:05:34 +00001018 cERROR(1, ("Filldir for parent dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001019 rc = -ENOMEM;
1020 break;
1021 }
Steve French60808232006-04-22 15:53:05 +00001022 file->f_pos++;
1023 default:
Steve French38702532007-07-08 15:40:40 +00001024 /* 1) If search is active,
1025 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -07001026 if it before then restart search
1027 if after then keep searching till find it */
1028
Steve French790fe572007-07-07 19:25:05 +00001029 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +00001030 rc = initiate_cifs_search(xid, file);
Steve French790fe572007-07-07 19:25:05 +00001031 cFYI(1, ("initiate cifs search rc %d", rc));
1032 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001033 FreeXid(xid);
1034 return rc;
1035 }
1036 }
Steve French790fe572007-07-07 19:25:05 +00001037 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001038 rc = -EINVAL;
1039 FreeXid(xid);
1040 return rc;
1041 }
1042 cifsFile = file->private_data;
1043 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +00001044 if (cifsFile->srch_inf.emptyDir) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001045 cFYI(1, ("End of search, empty dir"));
1046 rc = 0;
1047 break;
1048 }
1049 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +00001050 cifsFile->invalidHandle = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001052 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053
Steve French38702532007-07-08 15:40:40 +00001054 rc = find_cifs_entry(xid, pTcon, file,
1055 &current_entry, &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +00001056 if (rc) {
1057 cFYI(1, ("fce error %d", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001058 goto rddir2_exit;
1059 } else if (current_entry != NULL) {
Steve French790fe572007-07-07 19:25:05 +00001060 cFYI(1, ("entry %lld found", file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001061 } else {
Steve French790fe572007-07-07 19:25:05 +00001062 cFYI(1, ("could not find entry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 goto rddir2_exit;
1064 }
Steve French790fe572007-07-07 19:25:05 +00001065 cFYI(1, ("loop through %d times filling dir for net buf %p",
1066 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
Steve French5bafd762006-06-07 00:18:43 +00001067 max_len = smbCalcSize((struct smb_hdr *)
1068 cifsFile->srch_inf.ntwrk_buf_start);
1069 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1070
Steve French6a0b4822005-04-28 22:41:05 -07001071 /* To be safe - for UCS to UTF-8 with strings loaded
1072 with the rare long characters alloc more to account for
1073 such multibyte target UTF-8 characters. cifs_unicode.c,
1074 which actually does the conversion, has the same limit */
1075 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +00001076 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
1077 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001078 /* evaluate whether this case is an error */
Steve French26f57362007-08-30 22:09:15 +00001079 cERROR(1, ("past SMB end, num to fill %d i %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 num_to_fill, i));
1081 break;
1082 }
Steve French60808232006-04-22 15:53:05 +00001083 /* if buggy server returns . and .. late do
1084 we want to check for that here? */
Steve French5bafd762006-06-07 00:18:43 +00001085 rc = cifs_filldir(current_entry, file,
1086 filldir, direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +00001087 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +00001088 rc = 0;
1089 break;
1090 }
1091
Linus Torvalds1da177e2005-04-16 15:20:36 -07001092 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +00001093 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +00001094 cifsFile->srch_inf.index_of_last_entry) {
Steve French790fe572007-07-07 19:25:05 +00001095 cFYI(1, ("last entry in buf at pos %lld %s",
1096 file->f_pos, tmp_buf));
1097 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001098 break;
Steve French790fe572007-07-07 19:25:05 +00001099 } else
1100 current_entry =
Steve French5bafd762006-06-07 00:18:43 +00001101 nxt_dir_entry(current_entry, end_of_smb,
1102 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103 }
1104 kfree(tmp_buf);
1105 break;
1106 } /* end switch */
1107
1108rddir2_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001109 FreeXid(xid);
1110 return rc;
1111}