blob: 765adf12d54fa635d594b0ea25033aa51f186b7f [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
59/* Returns one if new inode created (which therefore needs to be hashed) */
60/* Might check in the future if inode number changed so we can rehash inode */
61static int construct_dentry(struct qstr *qstring, struct file *file,
62 struct inode **ptmp_inode, struct dentry **pnew_dentry)
63{
64 struct dentry *tmp_dentry;
65 struct cifs_sb_info *cifs_sb;
66 struct cifsTconInfo *pTcon;
67 int rc = 0;
68
Steve French966ca922005-04-28 22:41:08 -070069 cFYI(1, ("For %s", qstring->name));
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080070 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -070071 pTcon = cifs_sb->tcon;
72
73 qstring->hash = full_name_hash(qstring->name, qstring->len);
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080074 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
Linus Torvalds1da177e2005-04-16 15:20:36 -070075 if (tmp_dentry) {
Steve French6dc0f872007-07-06 23:13:06 +000076 cFYI(0, ("existing dentry with inode 0x%p",
77 tmp_dentry->d_inode));
Linus Torvalds1da177e2005-04-16 15:20:36 -070078 *ptmp_inode = tmp_dentry->d_inode;
79/* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
Steve French4523cc32007-04-30 20:13:06 +000080 if (*ptmp_inode == NULL) {
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080081 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
Steve French4523cc32007-04-30 20:13:06 +000082 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -070083 return rc;
84 rc = 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -070085 }
Steve French4523cc32007-04-30 20:13:06 +000086 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
Steve French1b2b2122007-02-17 04:30:54 +000087 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -070088 } else {
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080089 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
Steve French4523cc32007-04-30 20:13:06 +000090 if (tmp_dentry == NULL) {
Steve French6dc0f872007-07-06 23:13:06 +000091 cERROR(1, ("Failed allocating dentry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -070092 *ptmp_inode = NULL;
93 return rc;
94 }
95
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -080096 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
Steve Frenchb92327f2005-08-22 20:09:43 -070097 if (pTcon->nocase)
98 tmp_dentry->d_op = &cifs_ci_dentry_ops;
99 else
100 tmp_dentry->d_op = &cifs_dentry_ops;
Steve French4523cc32007-04-30 20:13:06 +0000101 if (*ptmp_inode == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102 return rc;
Steve French4523cc32007-04-30 20:13:06 +0000103 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
Steve French38702532007-07-08 15:40:40 +0000104 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
Steve Frenchb835beb2006-09-06 22:02:22 +0000105 rc = 2;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700106 }
107
108 tmp_dentry->d_time = jiffies;
109 *pnew_dentry = tmp_dentry;
110 return rc;
111}
112
Steve French790fe572007-07-07 19:25:05 +0000113static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode)
Steve French533f90a2006-10-12 00:02:32 +0000114{
Steve French4523cc32007-04-30 20:13:06 +0000115 if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
Steve Frenchddae9572006-10-12 01:23:29 +0000116 inode->i_ctime.tv_sec += tcon->ses->server->timeAdj;
117 inode->i_mtime.tv_sec += tcon->ses->server->timeAdj;
118 inode->i_atime.tv_sec += tcon->ses->server->timeAdj;
Steve French533f90a2006-10-12 00:02:32 +0000119 }
120 return;
121}
122
123
Steve French5bafd762006-06-07 00:18:43 +0000124static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
Steve French2c2130e2007-10-12 19:10:28 +0000125 char *buf, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126{
Steve French966ca922005-04-28 22:41:08 -0700127 loff_t local_size;
128 struct timespec local_mtime;
129
Linus Torvalds1da177e2005-04-16 15:20:36 -0700130 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
131 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
Steve French5bafd762006-06-07 00:18:43 +0000132 __u32 attr;
133 __u64 allocation_size;
134 __u64 end_of_file;
Jeff Layton4468eb32008-05-22 09:31:40 -0400135 umode_t default_mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136
Steve French966ca922005-04-28 22:41:08 -0700137 /* save mtime and size */
138 local_mtime = tmp_inode->i_mtime;
139 local_size = tmp_inode->i_size;
140
Steve French4523cc32007-04-30 20:13:06 +0000141 if (new_buf_type) {
Steve French5bafd762006-06-07 00:18:43 +0000142 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
143
144 attr = le32_to_cpu(pfindData->ExtFileAttributes);
145 allocation_size = le64_to_cpu(pfindData->AllocationSize);
146 end_of_file = le64_to_cpu(pfindData->EndOfFile);
147 tmp_inode->i_atime =
148 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
149 tmp_inode->i_mtime =
150 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
151 tmp_inode->i_ctime =
152 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
153 } else { /* legacy, OS2 and DOS style */
Steve French1bd5bbc2006-09-28 03:35:57 +0000154/* struct timespec ts;*/
Steve Frenchad7a2922008-02-07 23:25:02 +0000155 FIND_FILE_STANDARD_INFO *pfindData =
Steve French5bafd762006-06-07 00:18:43 +0000156 (FIND_FILE_STANDARD_INFO *)buf;
157
Steve French268f3be2006-10-06 21:47:09 +0000158 tmp_inode->i_mtime = cnvrtDosUnixTm(
Steve French1bd5bbc2006-09-28 03:35:57 +0000159 le16_to_cpu(pfindData->LastWriteDate),
Steve French268f3be2006-10-06 21:47:09 +0000160 le16_to_cpu(pfindData->LastWriteTime));
161 tmp_inode->i_atime = cnvrtDosUnixTm(
162 le16_to_cpu(pfindData->LastAccessDate),
163 le16_to_cpu(pfindData->LastAccessTime));
Steve Frencha8507902007-02-06 20:43:30 +0000164 tmp_inode->i_ctime = cnvrtDosUnixTm(
165 le16_to_cpu(pfindData->LastWriteDate),
166 le16_to_cpu(pfindData->LastWriteTime));
Steve French533f90a2006-10-12 00:02:32 +0000167 AdjustForTZ(cifs_sb->tcon, tmp_inode);
Steve French5bafd762006-06-07 00:18:43 +0000168 attr = le16_to_cpu(pfindData->Attributes);
169 allocation_size = le32_to_cpu(pfindData->AllocationSize);
170 end_of_file = le32_to_cpu(pfindData->DataSize);
Steve French5bafd762006-06-07 00:18:43 +0000171 }
172
Linus Torvalds1da177e2005-04-16 15:20:36 -0700173 /* Linux can not store file creation time unfortunately so ignore it */
Steve French5bafd762006-06-07 00:18:43 +0000174
175 cifsInfo->cifsAttrs = attr;
Steve Frencha6f8de32007-11-08 23:10:32 +0000176#ifdef CONFIG_CIFS_EXPERIMENTAL
177 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) {
178 /* get more accurate mode via ACL - so force inode refresh */
179 cifsInfo->time = 0;
180 } else
181#endif /* CONFIG_CIFS_EXPERIMENTAL */
182 cifsInfo->time = jiffies;
Steve French5bafd762006-06-07 00:18:43 +0000183
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
185 /* 2767 perms - indicate mandatory locking */
Steve French790fe572007-07-07 19:25:05 +0000186 /* BB fill in uid and gid here? with help from winbind?
Linus Torvalds1da177e2005-04-16 15:20:36 -0700187 or retrieve from NTFS stream extended attribute */
188 if (atomic_read(&cifsInfo->inUse) == 0) {
189 tmp_inode->i_uid = cifs_sb->mnt_uid;
190 tmp_inode->i_gid = cifs_sb->mnt_gid;
Jeff Layton4468eb32008-05-22 09:31:40 -0400191 }
192
193 if (attr & ATTR_DIRECTORY)
194 default_mode = cifs_sb->mnt_dir_mode;
195 else
196 default_mode = cifs_sb->mnt_file_mode;
197
198 /* set initial permissions */
199 if ((atomic_read(&cifsInfo->inUse) == 0) ||
200 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) == 0)
201 tmp_inode->i_mode = default_mode;
202 else {
203 /* just reenable write bits if !ATTR_READONLY */
204 if ((tmp_inode->i_mode & S_IWUGO) == 0 &&
205 (attr & ATTR_READONLY) == 0)
206 tmp_inode->i_mode |= (S_IWUGO & default_mode);
207
Steve French3020a1f2005-11-18 11:31:10 -0800208 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700209 }
210
Jeff Layton4468eb32008-05-22 09:31:40 -0400211 /* clear write bits if ATTR_READONLY is set */
212 if (attr & ATTR_READONLY)
213 tmp_inode->i_mode &= ~S_IWUGO;
214
215 /* set inode type */
216 if ((attr & ATTR_SYSTEM) &&
217 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL)) {
Steve French3020a1f2005-11-18 11:31:10 -0800218 if (end_of_file == 0) {
Steve French3020a1f2005-11-18 11:31:10 -0800219 tmp_inode->i_mode |= S_IFIFO;
Jeff Layton4468eb32008-05-22 09:31:40 -0400220 *pobject_type = DT_FIFO;
Steve French3020a1f2005-11-18 11:31:10 -0800221 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400222 /*
223 * trying to get the type can be slow, so just call
224 * this a regular file for now, and mark for reval
225 */
Steve French790fe572007-07-07 19:25:05 +0000226 tmp_inode->i_mode |= S_IFREG;
Jeff Layton4468eb32008-05-22 09:31:40 -0400227 *pobject_type = DT_REG;
Steve French790fe572007-07-07 19:25:05 +0000228 cifsInfo->time = 0;
Steve French3020a1f2005-11-18 11:31:10 -0800229 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 } else {
Jeff Layton4468eb32008-05-22 09:31:40 -0400231 if (attr & ATTR_DIRECTORY) {
232 tmp_inode->i_mode |= S_IFDIR;
233 *pobject_type = DT_DIR;
234 } else {
235 tmp_inode->i_mode |= S_IFREG;
236 *pobject_type = DT_REG;
237 }
238 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239
240 /* can not fill in nlink here as in qpathinfo version and Unx search */
Steve Frenchad7a2922008-02-07 23:25:02 +0000241 if (atomic_read(&cifsInfo->inUse) == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 atomic_set(&cifsInfo->inUse, 1);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243
Steve French3677db12007-02-26 16:46:11 +0000244 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000245 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000246 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 client is writing to it due to potential races */
248 i_size_write(tmp_inode, end_of_file);
249
250 /* 512 bytes (2**9) is the fake blocksize that must be used */
251 /* for this calculation, even though the reported blocksize is larger */
252 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
253 }
Steve French3677db12007-02-26 16:46:11 +0000254 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700255
256 if (allocation_size < end_of_file)
257 cFYI(1, ("May be sparse file, allocation less than file size"));
Theodore Ts'oba52de12006-09-27 01:50:49 -0700258 cFYI(1, ("File Size %ld and blocks %llu",
Andrew Morton5515eff2006-03-26 01:37:53 -0800259 (unsigned long)tmp_inode->i_size,
Theodore Ts'oba52de12006-09-27 01:50:49 -0700260 (unsigned long long)tmp_inode->i_blocks));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (S_ISREG(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700262 cFYI(1, ("File inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700263 tmp_inode->i_op = &cifs_file_inode_ops;
Steve French4523cc32007-04-30 20:13:06 +0000264 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
265 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800266 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
267 else
268 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000269 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve French8b94bcb2005-11-11 11:41:00 -0800270 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 else
272 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800273
Steve French4523cc32007-04-30 20:13:06 +0000274 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve Frenchbfa0d752005-08-31 21:50:37 -0700275 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000276 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
277 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
278 else
279 tmp_inode->i_data.a_ops = &cifs_addr_ops;
280
Steve French4523cc32007-04-30 20:13:06 +0000281 if (isNewInode)
Steve Frenchdfb75332005-06-22 17:13:47 -0700282 return; /* No sense invalidating pages for new inode
283 since have not started caching readahead file
284 data yet */
Steve French966ca922005-04-28 22:41:08 -0700285
286 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
287 (local_size == tmp_inode->i_size)) {
288 cFYI(1, ("inode exists but unchanged"));
289 } else {
290 /* file may have changed on server */
291 cFYI(1, ("invalidate inode, readdir detected change"));
292 invalidate_remote_inode(tmp_inode);
293 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294 } else if (S_ISDIR(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700295 cFYI(1, ("Directory inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 tmp_inode->i_op = &cifs_dir_inode_ops;
297 tmp_inode->i_fop = &cifs_dir_ops;
298 } else if (S_ISLNK(tmp_inode->i_mode)) {
Steve French966ca922005-04-28 22:41:08 -0700299 cFYI(1, ("Symbolic Link inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300 tmp_inode->i_op = &cifs_symlink_inode_ops;
301 } else {
Steve French966ca922005-04-28 22:41:08 -0700302 cFYI(1, ("Init special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 init_special_inode(tmp_inode, tmp_inode->i_mode,
304 tmp_inode->i_rdev);
305 }
306}
307
308static void unix_fill_in_inode(struct inode *tmp_inode,
Steve French2c2130e2007-10-12 19:10:28 +0000309 FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310{
Steve French966ca922005-04-28 22:41:08 -0700311 loff_t local_size;
312 struct timespec local_mtime;
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
315 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
316
317 __u32 type = le32_to_cpu(pfindData->Type);
318 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
319 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
320 cifsInfo->time = jiffies;
321 atomic_inc(&cifsInfo->inUse);
322
Steve French966ca922005-04-28 22:41:08 -0700323 /* save mtime and size */
324 local_mtime = tmp_inode->i_mtime;
325 local_size = tmp_inode->i_size;
326
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 tmp_inode->i_atime =
328 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
329 tmp_inode->i_mtime =
330 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
331 tmp_inode->i_ctime =
332 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
333
334 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
Steve French3020a1f2005-11-18 11:31:10 -0800335 /* since we set the inode type below we need to mask off type
Steve French790fe572007-07-07 19:25:05 +0000336 to avoid strange results if bits above were corrupt */
337 tmp_inode->i_mode &= ~S_IFMT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700338 if (type == UNIX_FILE) {
339 *pobject_type = DT_REG;
340 tmp_inode->i_mode |= S_IFREG;
341 } else if (type == UNIX_SYMLINK) {
342 *pobject_type = DT_LNK;
343 tmp_inode->i_mode |= S_IFLNK;
344 } else if (type == UNIX_DIR) {
345 *pobject_type = DT_DIR;
346 tmp_inode->i_mode |= S_IFDIR;
347 } else if (type == UNIX_CHARDEV) {
348 *pobject_type = DT_CHR;
349 tmp_inode->i_mode |= S_IFCHR;
350 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
351 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
352 } else if (type == UNIX_BLOCKDEV) {
353 *pobject_type = DT_BLK;
354 tmp_inode->i_mode |= S_IFBLK;
355 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
356 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
357 } else if (type == UNIX_FIFO) {
358 *pobject_type = DT_FIFO;
359 tmp_inode->i_mode |= S_IFIFO;
360 } else if (type == UNIX_SOCKET) {
361 *pobject_type = DT_SOCK;
362 tmp_inode->i_mode |= S_IFSOCK;
Steve French3020a1f2005-11-18 11:31:10 -0800363 } else {
364 /* safest to just call it a file */
365 *pobject_type = DT_REG;
366 tmp_inode->i_mode |= S_IFREG;
Steve French790fe572007-07-07 19:25:05 +0000367 cFYI(1, ("unknown inode type %d", type));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 }
369
Steve French4523cc32007-04-30 20:13:06 +0000370 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
371 tmp_inode->i_uid = cifs_sb->mnt_uid;
372 else
373 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
374 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
375 tmp_inode->i_gid = cifs_sb->mnt_gid;
376 else
377 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
379
Steve French3677db12007-02-26 16:46:11 +0000380 spin_lock(&tmp_inode->i_lock);
Steve French7ba52632007-02-08 18:14:13 +0000381 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
Steve French790fe572007-07-07 19:25:05 +0000382 /* can not safely change the file size here if the
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 client is writing to it due to potential races */
Steve French7ba52632007-02-08 18:14:13 +0000384 i_size_write(tmp_inode, end_of_file);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700385
386 /* 512 bytes (2**9) is the fake blocksize that must be used */
387 /* for this calculation, not the real blocksize */
388 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
389 }
Steve French3677db12007-02-26 16:46:11 +0000390 spin_unlock(&tmp_inode->i_lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
392 if (S_ISREG(tmp_inode->i_mode)) {
393 cFYI(1, ("File inode"));
394 tmp_inode->i_op = &cifs_file_inode_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800395
Steve French4523cc32007-04-30 20:13:06 +0000396 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
397 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800398 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
399 else
400 tmp_inode->i_fop = &cifs_file_direct_ops;
Steve French4523cc32007-04-30 20:13:06 +0000401 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800402 tmp_inode->i_fop = &cifs_file_nobrl_ops;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 else
404 tmp_inode->i_fop = &cifs_file_ops;
Steve Frenchf3f6ec42006-01-08 20:12:58 -0800405
Steve French4523cc32007-04-30 20:13:06 +0000406 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
Steve French790fe572007-07-07 19:25:05 +0000407 (cifs_sb->tcon->ses->server->maxBuf <
Dave Kleikamp273d81d2006-06-01 19:41:23 +0000408 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
409 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
410 else
411 tmp_inode->i_data.a_ops = &cifs_addr_ops;
Steve French966ca922005-04-28 22:41:08 -0700412
Steve French4523cc32007-04-30 20:13:06 +0000413 if (isNewInode)
Steve French790fe572007-07-07 19:25:05 +0000414 return; /* No sense invalidating pages for new inode
415 since we have not started caching readahead
416 file data for it yet */
Steve French966ca922005-04-28 22:41:08 -0700417
418 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
419 (local_size == tmp_inode->i_size)) {
420 cFYI(1, ("inode exists but unchanged"));
421 } else {
422 /* file may have changed on server */
423 cFYI(1, ("invalidate inode, readdir detected change"));
424 invalidate_remote_inode(tmp_inode);
425 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700426 } else if (S_ISDIR(tmp_inode->i_mode)) {
427 cFYI(1, ("Directory inode"));
428 tmp_inode->i_op = &cifs_dir_inode_ops;
429 tmp_inode->i_fop = &cifs_dir_ops;
430 } else if (S_ISLNK(tmp_inode->i_mode)) {
431 cFYI(1, ("Symbolic Link inode"));
432 tmp_inode->i_op = &cifs_symlink_inode_ops;
433/* tmp_inode->i_fop = *//* do not need to set to anything */
434 } else {
Steve French790fe572007-07-07 19:25:05 +0000435 cFYI(1, ("Special inode"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 init_special_inode(tmp_inode, tmp_inode->i_mode,
437 tmp_inode->i_rdev);
438 }
439}
440
441static int initiate_cifs_search(const int xid, struct file *file)
442{
443 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000444 char *full_path;
445 struct cifsFileInfo *cifsFile;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446 struct cifs_sb_info *cifs_sb;
447 struct cifsTconInfo *pTcon;
448
Steve French4523cc32007-04-30 20:13:06 +0000449 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +0000450 file->private_data =
451 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 }
453
Steve French4523cc32007-04-30 20:13:06 +0000454 if (file->private_data == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700455 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456 cifsFile = file->private_data;
Steve French4b18f2a2008-04-29 00:06:05 +0000457 cifsFile->invalidHandle = true;
458 cifsFile->srch_inf.endOfSearch = false;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700459
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800460 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Steve French4523cc32007-04-30 20:13:06 +0000461 if (cifs_sb == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700462 return -EINVAL;
463
464 pTcon = cifs_sb->tcon;
Steve French4523cc32007-04-30 20:13:06 +0000465 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700466 return -EINVAL;
467
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -0800468 full_path = build_path_from_dentry(file->f_path.dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700469
Steve Frenchad7a2922008-02-07 23:25:02 +0000470 if (full_path == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700471 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700472
Steve French966ca922005-04-28 22:41:08 -0700473 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700474
Steve French75cf6bd2005-04-28 22:41:04 -0700475ffirst_retry:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700476 /* test for Unix extensions */
Steve Frenchc18c8422007-07-18 23:21:09 +0000477 /* but now check for them on the share/mount not on the SMB session */
478/* if (pTcon->ses->capabilities & CAP_UNIX) { */
Steve Frenchad7a2922008-02-07 23:25:02 +0000479 if (pTcon->unix_ext)
Steve French5bafd762006-06-07 00:18:43 +0000480 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
Steve Frenchad7a2922008-02-07 23:25:02 +0000481 else if ((pTcon->ses->capabilities &
Steve French5bafd762006-06-07 00:18:43 +0000482 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
483 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700484 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
485 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
486 } else /* not srvinos - BB fixme add check for backlevel? */ {
487 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
488 }
489
Steve French38702532007-07-08 15:40:40 +0000490 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
Steve French737b7582005-04-28 22:41:06 -0700491 &cifsFile->netfid, &cifsFile->srch_inf,
Steve French38702532007-07-08 15:40:40 +0000492 cifs_sb->mnt_cifs_flags &
Steve Frencheafe8702005-09-15 21:47:30 -0700493 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
Steve French4523cc32007-04-30 20:13:06 +0000494 if (rc == 0)
Steve French4b18f2a2008-04-29 00:06:05 +0000495 cifsFile->invalidHandle = false;
Steve French38702532007-07-08 15:40:40 +0000496 if ((rc == -EOPNOTSUPP) &&
Steve French75cf6bd2005-04-28 22:41:04 -0700497 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
498 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
499 goto ffirst_retry;
500 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700501 kfree(full_path);
502 return rc;
503}
504
505/* return length of unicode string in bytes */
506static int cifs_unicode_bytelen(char *str)
507{
508 int len;
Steve French63d25832007-11-05 21:46:10 +0000509 __le16 *ustr = (__le16 *)str;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700510
Steve French38702532007-07-08 15:40:40 +0000511 for (len = 0; len <= PATH_MAX; len++) {
Steve French4523cc32007-04-30 20:13:06 +0000512 if (ustr[len] == 0)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700513 return len << 1;
514 }
Steve French790fe572007-07-07 19:25:05 +0000515 cFYI(1, ("Unicode string longer than PATH_MAX found"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700516 return len << 1;
517}
518
Steve French5bafd762006-06-07 00:18:43 +0000519static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700520{
Steve French38702532007-07-08 15:40:40 +0000521 char *new_entry;
Steve Frenchad7a2922008-02-07 23:25:02 +0000522 FILE_DIRECTORY_INFO *pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700523
Steve French4523cc32007-04-30 20:13:06 +0000524 if (level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000525 FIND_FILE_STANDARD_INFO *pfData;
Steve French5bafd762006-06-07 00:18:43 +0000526 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
527
528 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
529 pfData->FileNameLength;
530 } else
531 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
Steve French790fe572007-07-07 19:25:05 +0000532 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700533 /* validate that new_entry is not past end of SMB */
Steve French4523cc32007-04-30 20:13:06 +0000534 if (new_entry >= end_of_smb) {
Steve French09d1db52005-04-28 22:41:08 -0700535 cERROR(1,
536 ("search entry %p began after end of SMB %p old entry %p",
Steve French38702532007-07-08 15:40:40 +0000537 new_entry, end_of_smb, old_entry));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700538 return NULL;
Steve French4523cc32007-04-30 20:13:06 +0000539 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
Steve French38702532007-07-08 15:40:40 +0000540 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
541 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
Steve French5bafd762006-06-07 00:18:43 +0000542 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
Steve French38702532007-07-08 15:40:40 +0000543 cERROR(1, ("search entry %p extends after end of SMB %p",
Steve French09d1db52005-04-28 22:41:08 -0700544 new_entry, end_of_smb));
545 return NULL;
Steve French38702532007-07-08 15:40:40 +0000546 } else
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547 return new_entry;
548
549}
550
551#define UNICODE_DOT cpu_to_le16(0x2e)
552
553/* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
554static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
555{
556 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000557 char *filename = NULL;
558 int len = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700559
Steve French4523cc32007-04-30 20:13:06 +0000560 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000561 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700562 filename = &pFindData->FileName[0];
Steve French4523cc32007-04-30 20:13:06 +0000563 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700564 len = cifs_unicode_bytelen(filename);
565 } else {
566 /* BB should we make this strnlen of PATH_MAX? */
567 len = strnlen(filename, 5);
568 }
Steve French4523cc32007-04-30 20:13:06 +0000569 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000570 FILE_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700571 (FILE_DIRECTORY_INFO *)current_entry;
572 filename = &pFindData->FileName[0];
573 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000574 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000575 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000576 FILE_FULL_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700577 (FILE_FULL_DIRECTORY_INFO *)current_entry;
578 filename = &pFindData->FileName[0];
579 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000580 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000581 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000582 SEARCH_ID_FULL_DIR_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700583 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
584 filename = &pFindData->FileName[0];
585 len = le32_to_cpu(pFindData->FileNameLength);
Steve French38702532007-07-08 15:40:40 +0000586 } else if (cfile->srch_inf.info_level ==
Steve French5bafd762006-06-07 00:18:43 +0000587 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000588 FILE_BOTH_DIRECTORY_INFO *pFindData =
Linus Torvalds1da177e2005-04-16 15:20:36 -0700589 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
590 filename = &pFindData->FileName[0];
591 len = le32_to_cpu(pFindData->FileNameLength);
Steve French4523cc32007-04-30 20:13:06 +0000592 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
Steve Frenchad7a2922008-02-07 23:25:02 +0000593 FIND_FILE_STANDARD_INFO *pFindData =
Steve French5bafd762006-06-07 00:18:43 +0000594 (FIND_FILE_STANDARD_INFO *)current_entry;
595 filename = &pFindData->FileName[0];
Steve French5ddaa682006-08-15 13:35:48 +0000596 len = pFindData->FileNameLength;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700597 } else {
Steve French790fe572007-07-07 19:25:05 +0000598 cFYI(1, ("Unknown findfirst level %d",
599 cfile->srch_inf.info_level));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700600 }
601
Steve French4523cc32007-04-30 20:13:06 +0000602 if (filename) {
603 if (cfile->srch_inf.unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700604 __le16 *ufilename = (__le16 *)filename;
Steve French4523cc32007-04-30 20:13:06 +0000605 if (len == 2) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700606 /* check for . */
Steve French4523cc32007-04-30 20:13:06 +0000607 if (ufilename[0] == UNICODE_DOT)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700608 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000609 } else if (len == 4) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700610 /* check for .. */
Steve French4523cc32007-04-30 20:13:06 +0000611 if ((ufilename[0] == UNICODE_DOT)
Steve French38702532007-07-08 15:40:40 +0000612 && (ufilename[1] == UNICODE_DOT))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700613 rc = 2;
614 }
615 } else /* ASCII */ {
Steve French4523cc32007-04-30 20:13:06 +0000616 if (len == 1) {
Steve French38702532007-07-08 15:40:40 +0000617 if (filename[0] == '.')
Linus Torvalds1da177e2005-04-16 15:20:36 -0700618 rc = 1;
Steve French4523cc32007-04-30 20:13:06 +0000619 } else if (len == 2) {
Steve French790fe572007-07-07 19:25:05 +0000620 if ((filename[0] == '.') && (filename[1] == '.'))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700621 rc = 2;
622 }
623 }
624 }
625
626 return rc;
627}
628
Steve Frencheafe8702005-09-15 21:47:30 -0700629/* Check if directory that we are searching has changed so we can decide
630 whether we can use the cached search results from the previous search */
Steve French38702532007-07-08 15:40:40 +0000631static int is_dir_changed(struct file *file)
Steve Frencheafe8702005-09-15 21:47:30 -0700632{
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000633 struct inode *inode = file->f_path.dentry->d_inode;
634 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
Steve Frencheafe8702005-09-15 21:47:30 -0700635
Christoph Hellwigc33f8d32007-04-02 18:47:20 +0000636 if (cifsInfo->time == 0)
Steve Frencheafe8702005-09-15 21:47:30 -0700637 return 1; /* directory was changed, perhaps due to unlink */
638 else
639 return 0;
640
641}
642
Steve French0752f152008-10-07 20:03:33 +0000643static int cifs_save_resume_key(const char *current_entry,
644 struct cifsFileInfo *cifsFile)
645{
646 int rc = 0;
647 unsigned int len = 0;
648 __u16 level;
649 char *filename;
650
651 if ((cifsFile == NULL) || (current_entry == NULL))
652 return -EINVAL;
653
654 level = cifsFile->srch_inf.info_level;
655
656 if (level == SMB_FIND_FILE_UNIX) {
657 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
658
659 filename = &pFindData->FileName[0];
660 if (cifsFile->srch_inf.unicode) {
661 len = cifs_unicode_bytelen(filename);
662 } else {
663 /* BB should we make this strnlen of PATH_MAX? */
664 len = strnlen(filename, PATH_MAX);
665 }
666 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
667 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
668 FILE_DIRECTORY_INFO *pFindData =
669 (FILE_DIRECTORY_INFO *)current_entry;
670 filename = &pFindData->FileName[0];
671 len = le32_to_cpu(pFindData->FileNameLength);
672 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
673 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
674 FILE_FULL_DIRECTORY_INFO *pFindData =
675 (FILE_FULL_DIRECTORY_INFO *)current_entry;
676 filename = &pFindData->FileName[0];
677 len = le32_to_cpu(pFindData->FileNameLength);
678 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
679 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
680 SEARCH_ID_FULL_DIR_INFO *pFindData =
681 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
682 filename = &pFindData->FileName[0];
683 len = le32_to_cpu(pFindData->FileNameLength);
684 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
685 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
686 FILE_BOTH_DIRECTORY_INFO *pFindData =
687 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
688 filename = &pFindData->FileName[0];
689 len = le32_to_cpu(pFindData->FileNameLength);
690 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
691 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
692 FIND_FILE_STANDARD_INFO *pFindData =
693 (FIND_FILE_STANDARD_INFO *)current_entry;
694 filename = &pFindData->FileName[0];
695 /* one byte length, no name conversion */
696 len = (unsigned int)pFindData->FileNameLength;
697 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
698 } else {
699 cFYI(1, ("Unknown findfirst level %d", level));
700 return -EINVAL;
701 }
702 cifsFile->srch_inf.resume_name_len = len;
703 cifsFile->srch_inf.presume_name = filename;
704 return rc;
705}
706
Linus Torvalds1da177e2005-04-16 15:20:36 -0700707/* find the corresponding entry in the search */
708/* Note that the SMB server returns search entries for . and .. which
709 complicates logic here if we choose to parse for them and we do not
710 assume that they are located in the findfirst return buffer.*/
711/* We start counting in the buffer with entry 2 and increment for every
712 entry (do not increment for . or .. entry) */
713static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
Steve French38702532007-07-08 15:40:40 +0000714 struct file *file, char **ppCurrentEntry, int *num_to_ret)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700715{
716 int rc = 0;
717 int pos_in_buf = 0;
718 loff_t first_entry_in_buffer;
719 loff_t index_to_find = file->f_pos;
Steve French38702532007-07-08 15:40:40 +0000720 struct cifsFileInfo *cifsFile = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700721 /* check if index in the buffer */
Steve French50c2f752007-07-13 00:33:32 +0000722
Steve French38702532007-07-08 15:40:40 +0000723 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700724 (num_to_ret == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725 return -ENOENT;
Steve French50c2f752007-07-13 00:33:32 +0000726
Linus Torvalds1da177e2005-04-16 15:20:36 -0700727 *ppCurrentEntry = NULL;
Steve French38702532007-07-08 15:40:40 +0000728 first_entry_in_buffer =
729 cifsFile->srch_inf.index_of_last_entry -
Linus Torvalds1da177e2005-04-16 15:20:36 -0700730 cifsFile->srch_inf.entries_in_buffer;
Steve French60808232006-04-22 15:53:05 +0000731
732 /* if first entry in buf is zero then is first buffer
733 in search response data which means it is likely . and ..
734 will be in this buffer, although some servers do not return
735 . and .. for the root of a drive and for those we need
736 to start two entries earlier */
737
Steve French39798772006-05-31 22:40:51 +0000738 dump_cifs_file_struct(file, "In fce ");
Steve French38702532007-07-08 15:40:40 +0000739 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
740 is_dir_changed(file)) ||
Steve Frencheafe8702005-09-15 21:47:30 -0700741 (index_to_find < first_entry_in_buffer)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700742 /* close and restart search */
Steve French790fe572007-07-07 19:25:05 +0000743 cFYI(1, ("search backing up - close and restart search"));
Steve French77c57ec2008-05-13 21:39:32 +0000744 if (!cifsFile->srch_inf.endOfSearch &&
745 !cifsFile->invalidHandle) {
746 cifsFile->invalidHandle = true;
747 CIFSFindClose(xid, pTcon, cifsFile->netfid);
748 }
Steve French4523cc32007-04-30 20:13:06 +0000749 if (cifsFile->srch_inf.ntwrk_buf_start) {
Steve French790fe572007-07-07 19:25:05 +0000750 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
Steve French4523cc32007-04-30 20:13:06 +0000751 if (cifsFile->srch_inf.smallBuf)
Steve Frenchd47d7c12006-02-28 03:45:48 +0000752 cifs_small_buf_release(cifsFile->srch_inf.
753 ntwrk_buf_start);
754 else
755 cifs_buf_release(cifsFile->srch_inf.
756 ntwrk_buf_start);
Shirish Pargaonkar76c510a2008-07-24 14:48:33 +0000757 cifsFile->srch_inf.ntwrk_buf_start = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700758 }
Steve French38702532007-07-08 15:40:40 +0000759 rc = initiate_cifs_search(xid, file);
Steve French4523cc32007-04-30 20:13:06 +0000760 if (rc) {
Steve French790fe572007-07-07 19:25:05 +0000761 cFYI(1, ("error %d reinitiating a search on rewind",
762 rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700763 return rc;
764 }
765 }
766
Steve French38702532007-07-08 15:40:40 +0000767 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
Steve French4b18f2a2008-04-29 00:06:05 +0000768 (rc == 0) && !cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +0000769 cFYI(1, ("calling findnext2"));
Steve French0752f152008-10-07 20:03:33 +0000770 cifs_save_resume_key(cifsFile->srch_inf.last_entry, cifsFile);
Steve French38702532007-07-08 15:40:40 +0000771 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
Steve Frenchdfb75332005-06-22 17:13:47 -0700772 &cifsFile->srch_inf);
Steve French4523cc32007-04-30 20:13:06 +0000773 if (rc)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700774 return -ENOENT;
775 }
Steve French4523cc32007-04-30 20:13:06 +0000776 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700777 /* we found the buffer that contains the entry */
778 /* scan and find it */
779 int i;
Steve French38702532007-07-08 15:40:40 +0000780 char *current_entry;
781 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
Linus Torvalds1da177e2005-04-16 15:20:36 -0700782 smbCalcSize((struct smb_hdr *)
783 cifsFile->srch_inf.ntwrk_buf_start);
Steve French60808232006-04-22 15:53:05 +0000784
785 current_entry = cifsFile->srch_inf.srch_entries_start;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700786 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
787 - cifsFile->srch_inf.entries_in_buffer;
788 pos_in_buf = index_to_find - first_entry_in_buffer;
Steve French790fe572007-07-07 19:25:05 +0000789 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
Steve French5bafd762006-06-07 00:18:43 +0000790
Steve Frenchad7a2922008-02-07 23:25:02 +0000791 for (i = 0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
Steve Frenchdfb75332005-06-22 17:13:47 -0700792 /* go entry by entry figuring out which is first */
Steve French38702532007-07-08 15:40:40 +0000793 current_entry = nxt_dir_entry(current_entry, end_of_smb,
Steve French5bafd762006-06-07 00:18:43 +0000794 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700795 }
Steve French790fe572007-07-07 19:25:05 +0000796 if ((current_entry == NULL) && (i < pos_in_buf)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700797 /* BB fixme - check if we should flag this error */
Steve French38702532007-07-08 15:40:40 +0000798 cERROR(1, ("reached end of buf searching for pos in buf"
Linus Torvalds1da177e2005-04-16 15:20:36 -0700799 " %d index to find %lld rc %d",
Steve French38702532007-07-08 15:40:40 +0000800 pos_in_buf, index_to_find, rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700801 }
802 rc = 0;
803 *ppCurrentEntry = current_entry;
804 } else {
Steve French790fe572007-07-07 19:25:05 +0000805 cFYI(1, ("index not in buffer - could not findnext into it"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700806 return 0;
807 }
808
Steve French790fe572007-07-07 19:25:05 +0000809 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
810 cFYI(1, ("can not return entries pos_in_buf beyond last"));
Linus Torvalds1da177e2005-04-16 15:20:36 -0700811 *num_to_ret = 0;
812 } else
813 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700814
815 return rc;
816}
817
818/* inode num, inode type and filename returned */
819static int cifs_get_name_from_search_buf(struct qstr *pqst,
820 char *current_entry, __u16 level, unsigned int unicode,
Steve French38702532007-07-08 15:40:40 +0000821 struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700822{
823 int rc = 0;
824 unsigned int len = 0;
Steve French38702532007-07-08 15:40:40 +0000825 char *filename;
826 struct nls_table *nlt = cifs_sb->local_nls;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700827
828 *pinum = 0;
829
Steve French790fe572007-07-07 19:25:05 +0000830 if (level == SMB_FIND_FILE_UNIX) {
Steve French38702532007-07-08 15:40:40 +0000831 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700832
833 filename = &pFindData->FileName[0];
Steve French790fe572007-07-07 19:25:05 +0000834 if (unicode) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700835 len = cifs_unicode_bytelen(filename);
836 } else {
837 /* BB should we make this strnlen of PATH_MAX? */
838 len = strnlen(filename, PATH_MAX);
839 }
840
Steve French38702532007-07-08 15:40:40 +0000841 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB */
Steve French790fe572007-07-07 19:25:05 +0000842 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843 *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;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700906 ino_t 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
Steve French38702532007-07-08 15:40:40 +0000939 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry);
Steve French790fe572007-07-07 19:25:05 +0000940 if ((tmp_inode == NULL) || (tmp_dentry == NULL))
Linus Torvalds1da177e2005-04-16 15:20:36 -0700941 return -ENOMEM;
942
Steve French790fe572007-07-07 19:25:05 +0000943 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700944 /* inode created, we need to hash it with right inode number */
Steve French790fe572007-07-07 19:25:05 +0000945 if (inum != 0) {
Steve French38702532007-07-08 15:40:40 +0000946 /* BB fixme - hash the 2 32 quantities bits together if
947 * necessary BB */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700948 tmp_inode->i_ino = inum;
949 }
950 insert_inode_hash(tmp_inode);
951 }
952
Steve French966ca922005-04-28 22:41:08 -0700953 /* we pass in rc below, indicating whether it is a new inode,
954 so we can figure out whether to invalidate the inode cached
955 data if the file has changed */
Steve French790fe572007-07-07 19:25:05 +0000956 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
Steve French966ca922005-04-28 22:41:08 -0700957 unix_fill_in_inode(tmp_inode,
Steve French5bafd762006-06-07 00:18:43 +0000958 (FILE_UNIX_INFO *)pfindEntry,
959 &obj_type, rc);
Steve French790fe572007-07-07 19:25:05 +0000960 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
Steve French5bafd762006-06-07 00:18:43 +0000961 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
962 pfindEntry, &obj_type, rc);
963 else
964 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
Steve Frenchb835beb2006-09-06 22:02:22 +0000965
Steve French790fe572007-07-07 19:25:05 +0000966 if (rc) /* new inode - needs to be tied to dentry */ {
Steve Frenchb835beb2006-09-06 22:02:22 +0000967 d_instantiate(tmp_dentry, tmp_inode);
Steve French790fe572007-07-07 19:25:05 +0000968 if (rc == 2)
Steve Frenchb835beb2006-09-06 22:02:22 +0000969 d_rehash(tmp_dentry);
970 }
Steve French50c2f752007-07-13 00:33:32 +0000971
Steve French38702532007-07-08 15:40:40 +0000972
973 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
974 tmp_inode->i_ino, obj_type);
Steve French790fe572007-07-07 19:25:05 +0000975 if (rc) {
976 cFYI(1, ("filldir rc = %d", rc));
Steve French7ca85ba2006-10-30 21:42:57 +0000977 /* we can not return filldir errors to the caller
978 since they are "normal" when the stat blocksize
979 is too small - we return remapped error instead */
980 rc = -EOVERFLOW;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700981 }
982
983 dput(tmp_dentry);
984 return rc;
985}
986
Linus Torvalds1da177e2005-04-16 15:20:36 -0700987
988int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
989{
990 int rc = 0;
Steve French38702532007-07-08 15:40:40 +0000991 int xid, i;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700992 struct cifs_sb_info *cifs_sb;
993 struct cifsTconInfo *pTcon;
994 struct cifsFileInfo *cifsFile = NULL;
Steve French38702532007-07-08 15:40:40 +0000995 char *current_entry;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700996 int num_to_fill = 0;
Steve French38702532007-07-08 15:40:40 +0000997 char *tmp_buf = NULL;
Steve French50c2f752007-07-13 00:33:32 +0000998 char *end_of_smb;
Steve French5bafd762006-06-07 00:18:43 +0000999 int max_len;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001000
1001 xid = GetXid();
1002
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001003 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001004 pTcon = cifs_sb->tcon;
Steve French790fe572007-07-07 19:25:05 +00001005 if (pTcon == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001006 return -EINVAL;
1007
Linus Torvalds1da177e2005-04-16 15:20:36 -07001008 switch ((int) file->f_pos) {
1009 case 0:
Steve French60808232006-04-22 15:53:05 +00001010 if (filldir(direntry, ".", 1, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001011 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
Steve French60808232006-04-22 15:53:05 +00001012 cERROR(1, ("Filldir for current dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001013 rc = -ENOMEM;
1014 break;
1015 }
Steve French60808232006-04-22 15:53:05 +00001016 file->f_pos++;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001017 case 1:
Steve French60808232006-04-22 15:53:05 +00001018 if (filldir(direntry, "..", 2, file->f_pos,
Josef "Jeff" Sipeke6a00292006-12-08 02:36:48 -08001019 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
Steve French26a21b92006-05-31 18:05:34 +00001020 cERROR(1, ("Filldir for parent dir failed"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001021 rc = -ENOMEM;
1022 break;
1023 }
Steve French60808232006-04-22 15:53:05 +00001024 file->f_pos++;
1025 default:
Steve French38702532007-07-08 15:40:40 +00001026 /* 1) If search is active,
1027 is in current search buffer?
Linus Torvalds1da177e2005-04-16 15:20:36 -07001028 if it before then restart search
1029 if after then keep searching till find it */
1030
Steve French790fe572007-07-07 19:25:05 +00001031 if (file->private_data == NULL) {
Steve French38702532007-07-08 15:40:40 +00001032 rc = initiate_cifs_search(xid, file);
Steve French790fe572007-07-07 19:25:05 +00001033 cFYI(1, ("initiate cifs search rc %d", rc));
1034 if (rc) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001035 FreeXid(xid);
1036 return rc;
1037 }
1038 }
Steve French790fe572007-07-07 19:25:05 +00001039 if (file->private_data == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040 rc = -EINVAL;
1041 FreeXid(xid);
1042 return rc;
1043 }
1044 cifsFile = file->private_data;
1045 if (cifsFile->srch_inf.endOfSearch) {
Steve French790fe572007-07-07 19:25:05 +00001046 if (cifsFile->srch_inf.emptyDir) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001047 cFYI(1, ("End of search, empty dir"));
1048 rc = 0;
1049 break;
1050 }
1051 } /* else {
Steve French4b18f2a2008-04-29 00:06:05 +00001052 cifsFile->invalidHandle = true;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001053 CIFSFindClose(xid, pTcon, cifsFile->netfid);
Steve Frenchaaa9bbe2008-05-23 17:38:32 +00001054 } */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001055
Steve French38702532007-07-08 15:40:40 +00001056 rc = find_cifs_entry(xid, pTcon, file,
1057 &current_entry, &num_to_fill);
Steve French790fe572007-07-07 19:25:05 +00001058 if (rc) {
1059 cFYI(1, ("fce error %d", rc));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001060 goto rddir2_exit;
1061 } else if (current_entry != NULL) {
Steve French790fe572007-07-07 19:25:05 +00001062 cFYI(1, ("entry %lld found", file->f_pos));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001063 } else {
Steve French790fe572007-07-07 19:25:05 +00001064 cFYI(1, ("could not find entry"));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001065 goto rddir2_exit;
1066 }
Steve French790fe572007-07-07 19:25:05 +00001067 cFYI(1, ("loop through %d times filling dir for net buf %p",
1068 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
Steve French5bafd762006-06-07 00:18:43 +00001069 max_len = smbCalcSize((struct smb_hdr *)
1070 cifsFile->srch_inf.ntwrk_buf_start);
1071 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1072
Steve French6a0b4822005-04-28 22:41:05 -07001073 /* To be safe - for UCS to UTF-8 with strings loaded
1074 with the rare long characters alloc more to account for
1075 such multibyte target UTF-8 characters. cifs_unicode.c,
1076 which actually does the conversion, has the same limit */
1077 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
Steve French790fe572007-07-07 19:25:05 +00001078 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
1079 if (current_entry == NULL) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080 /* evaluate whether this case is an error */
Steve French26f57362007-08-30 22:09:15 +00001081 cERROR(1, ("past SMB end, num to fill %d i %d",
Linus Torvalds1da177e2005-04-16 15:20:36 -07001082 num_to_fill, i));
1083 break;
1084 }
Steve French60808232006-04-22 15:53:05 +00001085 /* if buggy server returns . and .. late do
1086 we want to check for that here? */
Steve French5bafd762006-06-07 00:18:43 +00001087 rc = cifs_filldir(current_entry, file,
1088 filldir, direntry, tmp_buf, max_len);
Steve French790fe572007-07-07 19:25:05 +00001089 if (rc == -EOVERFLOW) {
Steve French7ca85ba2006-10-30 21:42:57 +00001090 rc = 0;
1091 break;
1092 }
1093
Linus Torvalds1da177e2005-04-16 15:20:36 -07001094 file->f_pos++;
Steve French790fe572007-07-07 19:25:05 +00001095 if (file->f_pos ==
Steve French39798772006-05-31 22:40:51 +00001096 cifsFile->srch_inf.index_of_last_entry) {
Steve French790fe572007-07-07 19:25:05 +00001097 cFYI(1, ("last entry in buf at pos %lld %s",
1098 file->f_pos, tmp_buf));
1099 cifs_save_resume_key(current_entry, cifsFile);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001100 break;
Steve French790fe572007-07-07 19:25:05 +00001101 } else
1102 current_entry =
Steve French5bafd762006-06-07 00:18:43 +00001103 nxt_dir_entry(current_entry, end_of_smb,
1104 cifsFile->srch_inf.info_level);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001105 }
1106 kfree(tmp_buf);
1107 break;
1108 } /* end switch */
1109
1110rddir2_exit:
Linus Torvalds1da177e2005-04-16 15:20:36 -07001111 FreeXid(xid);
1112 return rc;
1113}