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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/readdir.c | |
3 | * | |
4 | * Directory search handling | |
6dc0f87e | 5 | * |
3677db10 | 6 | * Copyright (C) International Business Machines Corp., 2004, 2007 |
1da177e4 LT |
7 | * 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> | |
273d81d6 | 24 | #include <linux/pagemap.h> |
1da177e4 | 25 | #include <linux/stat.h> |
1da177e4 LT |
26 | #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 | ||
3979877e SF |
34 | #ifdef CONFIG_CIFS_DEBUG2 |
35 | static void dump_cifs_file_struct(struct file *file, char *label) | |
1da177e4 | 36 | { |
6dc0f87e | 37 | struct cifsFileInfo *cf; |
1da177e4 | 38 | |
4523cc30 | 39 | if (file) { |
1da177e4 | 40 | cf = file->private_data; |
4523cc30 | 41 | if (cf == NULL) { |
6dc0f87e | 42 | cFYI(1, ("empty cifs private file data")); |
1da177e4 LT |
43 | return; |
44 | } | |
4523cc30 | 45 | if (cf->invalidHandle) { |
6dc0f87e | 46 | cFYI(1, ("invalid handle")); |
1da177e4 | 47 | } |
4523cc30 | 48 | if (cf->srch_inf.endOfSearch) { |
6dc0f87e | 49 | cFYI(1, ("end of search")); |
1da177e4 | 50 | } |
4523cc30 | 51 | if (cf->srch_inf.emptyDir) { |
6dc0f87e | 52 | cFYI(1, ("empty dir")); |
1da177e4 | 53 | } |
1da177e4 | 54 | } |
3979877e SF |
55 | } |
56 | #endif /* DEBUG2 */ | |
1da177e4 LT |
57 | |
58 | /* Returns one if new inode created (which therefore needs to be hashed) */ | |
59 | /* Might check in the future if inode number changed so we can rehash inode */ | |
60 | static int construct_dentry(struct qstr *qstring, struct file *file, | |
61 | struct inode **ptmp_inode, struct dentry **pnew_dentry) | |
62 | { | |
63 | struct dentry *tmp_dentry; | |
64 | struct cifs_sb_info *cifs_sb; | |
65 | struct cifsTconInfo *pTcon; | |
66 | int rc = 0; | |
67 | ||
966ca923 | 68 | cFYI(1, ("For %s", qstring->name)); |
e6a00296 | 69 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
70 | pTcon = cifs_sb->tcon; |
71 | ||
72 | qstring->hash = full_name_hash(qstring->name, qstring->len); | |
e6a00296 | 73 | tmp_dentry = d_lookup(file->f_path.dentry, qstring); |
1da177e4 | 74 | if (tmp_dentry) { |
6dc0f87e SF |
75 | cFYI(0, ("existing dentry with inode 0x%p", |
76 | tmp_dentry->d_inode)); | |
1da177e4 LT |
77 | *ptmp_inode = tmp_dentry->d_inode; |
78 | /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/ | |
4523cc30 | 79 | if (*ptmp_inode == NULL) { |
e6a00296 | 80 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
4523cc30 | 81 | if (*ptmp_inode == NULL) |
1da177e4 LT |
82 | return rc; |
83 | rc = 1; | |
1da177e4 | 84 | } |
4523cc30 | 85 | if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
1b2b2126 | 86 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
1da177e4 | 87 | } else { |
e6a00296 | 88 | tmp_dentry = d_alloc(file->f_path.dentry, qstring); |
4523cc30 | 89 | if (tmp_dentry == NULL) { |
6dc0f87e | 90 | cERROR(1, ("Failed allocating dentry")); |
1da177e4 LT |
91 | *ptmp_inode = NULL; |
92 | return rc; | |
93 | } | |
94 | ||
e6a00296 | 95 | *ptmp_inode = new_inode(file->f_path.dentry->d_sb); |
b92327fe SF |
96 | if (pTcon->nocase) |
97 | tmp_dentry->d_op = &cifs_ci_dentry_ops; | |
98 | else | |
99 | tmp_dentry->d_op = &cifs_dentry_ops; | |
4523cc30 | 100 | if (*ptmp_inode == NULL) |
1da177e4 | 101 | return rc; |
4523cc30 | 102 | if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME) |
3870253e | 103 | (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME; |
b835bebe | 104 | rc = 2; |
1da177e4 LT |
105 | } |
106 | ||
107 | tmp_dentry->d_time = jiffies; | |
108 | *pnew_dentry = tmp_dentry; | |
109 | return rc; | |
110 | } | |
111 | ||
790fe579 | 112 | static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode) |
533f90af | 113 | { |
4523cc30 | 114 | if ((tcon) && (tcon->ses) && (tcon->ses->server)) { |
ddae957d SF |
115 | inode->i_ctime.tv_sec += tcon->ses->server->timeAdj; |
116 | inode->i_mtime.tv_sec += tcon->ses->server->timeAdj; | |
117 | inode->i_atime.tv_sec += tcon->ses->server->timeAdj; | |
533f90af SF |
118 | } |
119 | return; | |
120 | } | |
121 | ||
122 | ||
5bafd765 | 123 | static void fill_in_inode(struct inode *tmp_inode, int new_buf_type, |
2c2130e1 | 124 | char *buf, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 125 | { |
966ca923 SF |
126 | loff_t local_size; |
127 | struct timespec local_mtime; | |
128 | ||
1da177e4 LT |
129 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
130 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
5bafd765 SF |
131 | __u32 attr; |
132 | __u64 allocation_size; | |
133 | __u64 end_of_file; | |
1da177e4 | 134 | |
966ca923 SF |
135 | /* save mtime and size */ |
136 | local_mtime = tmp_inode->i_mtime; | |
137 | local_size = tmp_inode->i_size; | |
138 | ||
4523cc30 | 139 | if (new_buf_type) { |
5bafd765 SF |
140 | 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 */ | |
1bd5bbcb | 152 | /* struct timespec ts;*/ |
790fe579 | 153 | FIND_FILE_STANDARD_INFO * pfindData = |
5bafd765 SF |
154 | (FIND_FILE_STANDARD_INFO *)buf; |
155 | ||
268f3be1 | 156 | tmp_inode->i_mtime = cnvrtDosUnixTm( |
1bd5bbcb | 157 | le16_to_cpu(pfindData->LastWriteDate), |
268f3be1 SF |
158 | le16_to_cpu(pfindData->LastWriteTime)); |
159 | tmp_inode->i_atime = cnvrtDosUnixTm( | |
160 | le16_to_cpu(pfindData->LastAccessDate), | |
161 | le16_to_cpu(pfindData->LastAccessTime)); | |
a850790f SF |
162 | tmp_inode->i_ctime = cnvrtDosUnixTm( |
163 | le16_to_cpu(pfindData->LastWriteDate), | |
164 | le16_to_cpu(pfindData->LastWriteTime)); | |
533f90af | 165 | AdjustForTZ(cifs_sb->tcon, tmp_inode); |
5bafd765 SF |
166 | attr = le16_to_cpu(pfindData->Attributes); |
167 | allocation_size = le32_to_cpu(pfindData->AllocationSize); | |
168 | end_of_file = le32_to_cpu(pfindData->DataSize); | |
5bafd765 SF |
169 | } |
170 | ||
1da177e4 | 171 | /* Linux can not store file creation time unfortunately so ignore it */ |
5bafd765 SF |
172 | |
173 | cifsInfo->cifsAttrs = attr; | |
a6f8de3d SF |
174 | #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; | |
5bafd765 | 181 | |
1da177e4 LT |
182 | /* treat dos attribute of read-only as read-only mode bit e.g. 555? */ |
183 | /* 2767 perms - indicate mandatory locking */ | |
790fe579 | 184 | /* BB fill in uid and gid here? with help from winbind? |
1da177e4 LT |
185 | 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; | |
189 | /* set default mode. will override for dirs below */ | |
190 | tmp_inode->i_mode = cifs_sb->mnt_file_mode; | |
3020a1f5 SF |
191 | } else { |
192 | /* mask off the type bits since it gets set | |
193 | below and we do not want to get two type | |
194 | bits set */ | |
195 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
196 | } |
197 | ||
1da177e4 LT |
198 | if (attr & ATTR_DIRECTORY) { |
199 | *pobject_type = DT_DIR; | |
200 | /* override default perms since we do not lock dirs */ | |
4523cc30 | 201 | if (atomic_read(&cifsInfo->inUse) == 0) { |
1da177e4 LT |
202 | tmp_inode->i_mode = cifs_sb->mnt_dir_mode; |
203 | } | |
204 | tmp_inode->i_mode |= S_IFDIR; | |
790fe579 | 205 | } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) && |
3020a1f5 SF |
206 | (attr & ATTR_SYSTEM)) { |
207 | if (end_of_file == 0) { | |
208 | *pobject_type = DT_FIFO; | |
209 | tmp_inode->i_mode |= S_IFIFO; | |
210 | } else { | |
211 | /* rather than get the type here, we mark the | |
212 | inode as needing revalidate and get the real type | |
213 | (blk vs chr vs. symlink) later ie in lookup */ | |
214 | *pobject_type = DT_REG; | |
790fe579 SF |
215 | tmp_inode->i_mode |= S_IFREG; |
216 | cifsInfo->time = 0; | |
3020a1f5 | 217 | } |
1da177e4 LT |
218 | /* we no longer mark these because we could not follow them */ |
219 | /* } else if (attr & ATTR_REPARSE) { | |
790fe579 SF |
220 | *pobject_type = DT_LNK; |
221 | tmp_inode->i_mode |= S_IFLNK; */ | |
1da177e4 LT |
222 | } else { |
223 | *pobject_type = DT_REG; | |
224 | tmp_inode->i_mode |= S_IFREG; | |
225 | if (attr & ATTR_READONLY) | |
226 | tmp_inode->i_mode &= ~(S_IWUGO); | |
f5c1e2ea AT |
227 | else if ((tmp_inode->i_mode & S_IWUGO) == 0) |
228 | /* the ATTR_READONLY flag may have been changed on */ | |
790fe579 | 229 | /* server -- set any w bits allowed by mnt_file_mode */ |
f5c1e2ea | 230 | tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode); |
1da177e4 LT |
231 | } /* could add code here - to validate if device or weird share type? */ |
232 | ||
233 | /* can not fill in nlink here as in qpathinfo version and Unx search */ | |
234 | if (atomic_read(&cifsInfo->inUse) == 0) { | |
235 | atomic_set(&cifsInfo->inUse, 1); | |
236 | } | |
237 | ||
3677db10 | 238 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 239 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 240 | /* can not safely change the file size here if the |
1da177e4 LT |
241 | client is writing to it due to potential races */ |
242 | i_size_write(tmp_inode, end_of_file); | |
243 | ||
244 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
245 | /* for this calculation, even though the reported blocksize is larger */ | |
246 | tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9; | |
247 | } | |
3677db10 | 248 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
249 | |
250 | if (allocation_size < end_of_file) | |
251 | cFYI(1, ("May be sparse file, allocation less than file size")); | |
ba52de12 | 252 | cFYI(1, ("File Size %ld and blocks %llu", |
5515eff8 | 253 | (unsigned long)tmp_inode->i_size, |
ba52de12 | 254 | (unsigned long long)tmp_inode->i_blocks)); |
1da177e4 | 255 | if (S_ISREG(tmp_inode->i_mode)) { |
966ca923 | 256 | cFYI(1, ("File inode")); |
1da177e4 | 257 | tmp_inode->i_op = &cifs_file_inode_ops; |
4523cc30 SF |
258 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
259 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
8b94bcb9 SF |
260 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
261 | else | |
262 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 263 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
8b94bcb9 | 264 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
265 | else |
266 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 267 | |
4523cc30 | 268 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
bfa0d75a | 269 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
270 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
271 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
272 | else | |
273 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
274 | ||
4523cc30 | 275 | if (isNewInode) |
dfb7533b SF |
276 | return; /* No sense invalidating pages for new inode |
277 | since have not started caching readahead file | |
278 | data yet */ | |
966ca923 SF |
279 | |
280 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
281 | (local_size == tmp_inode->i_size)) { | |
282 | cFYI(1, ("inode exists but unchanged")); | |
283 | } else { | |
284 | /* file may have changed on server */ | |
285 | cFYI(1, ("invalidate inode, readdir detected change")); | |
286 | invalidate_remote_inode(tmp_inode); | |
287 | } | |
1da177e4 | 288 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
966ca923 | 289 | cFYI(1, ("Directory inode")); |
1da177e4 LT |
290 | tmp_inode->i_op = &cifs_dir_inode_ops; |
291 | tmp_inode->i_fop = &cifs_dir_ops; | |
292 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
966ca923 | 293 | cFYI(1, ("Symbolic Link inode")); |
1da177e4 LT |
294 | tmp_inode->i_op = &cifs_symlink_inode_ops; |
295 | } else { | |
966ca923 | 296 | cFYI(1, ("Init special inode")); |
1da177e4 LT |
297 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
298 | tmp_inode->i_rdev); | |
299 | } | |
300 | } | |
301 | ||
302 | static void unix_fill_in_inode(struct inode *tmp_inode, | |
2c2130e1 | 303 | FILE_UNIX_INFO *pfindData, unsigned int *pobject_type, int isNewInode) |
1da177e4 | 304 | { |
966ca923 SF |
305 | loff_t local_size; |
306 | struct timespec local_mtime; | |
307 | ||
1da177e4 LT |
308 | struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode); |
309 | struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb); | |
310 | ||
311 | __u32 type = le32_to_cpu(pfindData->Type); | |
312 | __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes); | |
313 | __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile); | |
314 | cifsInfo->time = jiffies; | |
315 | atomic_inc(&cifsInfo->inUse); | |
316 | ||
966ca923 SF |
317 | /* save mtime and size */ |
318 | local_mtime = tmp_inode->i_mtime; | |
319 | local_size = tmp_inode->i_size; | |
320 | ||
1da177e4 LT |
321 | tmp_inode->i_atime = |
322 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime)); | |
323 | tmp_inode->i_mtime = | |
324 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime)); | |
325 | tmp_inode->i_ctime = | |
326 | cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange)); | |
327 | ||
328 | tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions); | |
3020a1f5 | 329 | /* since we set the inode type below we need to mask off type |
790fe579 SF |
330 | to avoid strange results if bits above were corrupt */ |
331 | tmp_inode->i_mode &= ~S_IFMT; | |
1da177e4 LT |
332 | if (type == UNIX_FILE) { |
333 | *pobject_type = DT_REG; | |
334 | tmp_inode->i_mode |= S_IFREG; | |
335 | } else if (type == UNIX_SYMLINK) { | |
336 | *pobject_type = DT_LNK; | |
337 | tmp_inode->i_mode |= S_IFLNK; | |
338 | } else if (type == UNIX_DIR) { | |
339 | *pobject_type = DT_DIR; | |
340 | tmp_inode->i_mode |= S_IFDIR; | |
341 | } else if (type == UNIX_CHARDEV) { | |
342 | *pobject_type = DT_CHR; | |
343 | tmp_inode->i_mode |= S_IFCHR; | |
344 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
345 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
346 | } else if (type == UNIX_BLOCKDEV) { | |
347 | *pobject_type = DT_BLK; | |
348 | tmp_inode->i_mode |= S_IFBLK; | |
349 | tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor), | |
350 | le64_to_cpu(pfindData->DevMinor) & MINORMASK); | |
351 | } else if (type == UNIX_FIFO) { | |
352 | *pobject_type = DT_FIFO; | |
353 | tmp_inode->i_mode |= S_IFIFO; | |
354 | } else if (type == UNIX_SOCKET) { | |
355 | *pobject_type = DT_SOCK; | |
356 | tmp_inode->i_mode |= S_IFSOCK; | |
3020a1f5 SF |
357 | } else { |
358 | /* safest to just call it a file */ | |
359 | *pobject_type = DT_REG; | |
360 | tmp_inode->i_mode |= S_IFREG; | |
790fe579 | 361 | cFYI(1, ("unknown inode type %d", type)); |
1da177e4 LT |
362 | } |
363 | ||
4523cc30 SF |
364 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
365 | tmp_inode->i_uid = cifs_sb->mnt_uid; | |
366 | else | |
367 | tmp_inode->i_uid = le64_to_cpu(pfindData->Uid); | |
368 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) | |
369 | tmp_inode->i_gid = cifs_sb->mnt_gid; | |
370 | else | |
371 | tmp_inode->i_gid = le64_to_cpu(pfindData->Gid); | |
1da177e4 LT |
372 | tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks); |
373 | ||
3677db10 | 374 | spin_lock(&tmp_inode->i_lock); |
7ba52631 | 375 | if (is_size_safe_to_change(cifsInfo, end_of_file)) { |
790fe579 | 376 | /* can not safely change the file size here if the |
1da177e4 | 377 | client is writing to it due to potential races */ |
7ba52631 | 378 | i_size_write(tmp_inode, end_of_file); |
1da177e4 LT |
379 | |
380 | /* 512 bytes (2**9) is the fake blocksize that must be used */ | |
381 | /* for this calculation, not the real blocksize */ | |
382 | tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9; | |
383 | } | |
3677db10 | 384 | spin_unlock(&tmp_inode->i_lock); |
1da177e4 LT |
385 | |
386 | if (S_ISREG(tmp_inode->i_mode)) { | |
387 | cFYI(1, ("File inode")); | |
388 | tmp_inode->i_op = &cifs_file_inode_ops; | |
f3f6ec4b | 389 | |
4523cc30 SF |
390 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) { |
391 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
f3f6ec4b SF |
392 | tmp_inode->i_fop = &cifs_file_direct_nobrl_ops; |
393 | else | |
394 | tmp_inode->i_fop = &cifs_file_direct_ops; | |
4523cc30 | 395 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
f3f6ec4b | 396 | tmp_inode->i_fop = &cifs_file_nobrl_ops; |
1da177e4 LT |
397 | else |
398 | tmp_inode->i_fop = &cifs_file_ops; | |
f3f6ec4b | 399 | |
4523cc30 | 400 | if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) && |
790fe579 | 401 | (cifs_sb->tcon->ses->server->maxBuf < |
273d81d6 DK |
402 | PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE)) |
403 | tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf; | |
404 | else | |
405 | tmp_inode->i_data.a_ops = &cifs_addr_ops; | |
966ca923 | 406 | |
4523cc30 | 407 | if (isNewInode) |
790fe579 SF |
408 | return; /* No sense invalidating pages for new inode |
409 | since we have not started caching readahead | |
410 | file data for it yet */ | |
966ca923 SF |
411 | |
412 | if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) && | |
413 | (local_size == tmp_inode->i_size)) { | |
414 | cFYI(1, ("inode exists but unchanged")); | |
415 | } else { | |
416 | /* file may have changed on server */ | |
417 | cFYI(1, ("invalidate inode, readdir detected change")); | |
418 | invalidate_remote_inode(tmp_inode); | |
419 | } | |
1da177e4 LT |
420 | } else if (S_ISDIR(tmp_inode->i_mode)) { |
421 | cFYI(1, ("Directory inode")); | |
422 | tmp_inode->i_op = &cifs_dir_inode_ops; | |
423 | tmp_inode->i_fop = &cifs_dir_ops; | |
424 | } else if (S_ISLNK(tmp_inode->i_mode)) { | |
425 | cFYI(1, ("Symbolic Link inode")); | |
426 | tmp_inode->i_op = &cifs_symlink_inode_ops; | |
427 | /* tmp_inode->i_fop = *//* do not need to set to anything */ | |
428 | } else { | |
790fe579 | 429 | cFYI(1, ("Special inode")); |
1da177e4 LT |
430 | init_special_inode(tmp_inode, tmp_inode->i_mode, |
431 | tmp_inode->i_rdev); | |
432 | } | |
433 | } | |
434 | ||
435 | static int initiate_cifs_search(const int xid, struct file *file) | |
436 | { | |
437 | int rc = 0; | |
3870253e SF |
438 | char *full_path; |
439 | struct cifsFileInfo *cifsFile; | |
1da177e4 LT |
440 | struct cifs_sb_info *cifs_sb; |
441 | struct cifsTconInfo *pTcon; | |
442 | ||
4523cc30 | 443 | if (file->private_data == NULL) { |
3870253e SF |
444 | file->private_data = |
445 | kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL); | |
1da177e4 LT |
446 | } |
447 | ||
4523cc30 | 448 | if (file->private_data == NULL) |
1da177e4 | 449 | return -ENOMEM; |
1da177e4 LT |
450 | cifsFile = file->private_data; |
451 | cifsFile->invalidHandle = TRUE; | |
452 | cifsFile->srch_inf.endOfSearch = FALSE; | |
453 | ||
e6a00296 | 454 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
4523cc30 | 455 | if (cifs_sb == NULL) |
1da177e4 LT |
456 | return -EINVAL; |
457 | ||
458 | pTcon = cifs_sb->tcon; | |
4523cc30 | 459 | if (pTcon == NULL) |
1da177e4 LT |
460 | return -EINVAL; |
461 | ||
e6a00296 | 462 | full_path = build_path_from_dentry(file->f_path.dentry); |
1da177e4 | 463 | |
4523cc30 | 464 | if (full_path == NULL) { |
1da177e4 LT |
465 | return -ENOMEM; |
466 | } | |
467 | ||
966ca923 | 468 | cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos)); |
1da177e4 | 469 | |
75cf6bdc | 470 | ffirst_retry: |
1da177e4 | 471 | /* test for Unix extensions */ |
c18c842b SF |
472 | /* but now check for them on the share/mount not on the SMB session */ |
473 | /* if (pTcon->ses->capabilities & CAP_UNIX) { */ | |
474 | if (pTcon->unix_ext) { | |
5bafd765 | 475 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX; |
3870253e | 476 | } else if ((pTcon->ses->capabilities & |
5bafd765 SF |
477 | (CAP_NT_SMBS | CAP_NT_FIND)) == 0) { |
478 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD; | |
1da177e4 LT |
479 | } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
480 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO; | |
481 | } else /* not srvinos - BB fixme add check for backlevel? */ { | |
482 | cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO; | |
483 | } | |
484 | ||
3870253e | 485 | rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls, |
737b758c | 486 | &cifsFile->netfid, &cifsFile->srch_inf, |
3870253e | 487 | cifs_sb->mnt_cifs_flags & |
eafe8701 | 488 | CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb)); |
4523cc30 | 489 | if (rc == 0) |
1da177e4 | 490 | cifsFile->invalidHandle = FALSE; |
3870253e | 491 | if ((rc == -EOPNOTSUPP) && |
75cf6bdc SF |
492 | (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) { |
493 | cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM; | |
494 | goto ffirst_retry; | |
495 | } | |
1da177e4 LT |
496 | kfree(full_path); |
497 | return rc; | |
498 | } | |
499 | ||
500 | /* return length of unicode string in bytes */ | |
501 | static int cifs_unicode_bytelen(char *str) | |
502 | { | |
503 | int len; | |
63d2583f | 504 | __le16 *ustr = (__le16 *)str; |
1da177e4 | 505 | |
3870253e | 506 | for (len = 0; len <= PATH_MAX; len++) { |
4523cc30 | 507 | if (ustr[len] == 0) |
1da177e4 LT |
508 | return len << 1; |
509 | } | |
790fe579 | 510 | cFYI(1, ("Unicode string longer than PATH_MAX found")); |
1da177e4 LT |
511 | return len << 1; |
512 | } | |
513 | ||
5bafd765 | 514 | static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level) |
1da177e4 | 515 | { |
3870253e | 516 | char *new_entry; |
1da177e4 LT |
517 | FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry; |
518 | ||
4523cc30 | 519 | if (level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
520 | FIND_FILE_STANDARD_INFO * pfData; |
521 | pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo; | |
522 | ||
523 | new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) + | |
524 | pfData->FileNameLength; | |
525 | } else | |
526 | new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset); | |
790fe579 | 527 | cFYI(1, ("new entry %p old entry %p", new_entry, old_entry)); |
1da177e4 | 528 | /* validate that new_entry is not past end of SMB */ |
4523cc30 | 529 | if (new_entry >= end_of_smb) { |
09d1db5c SF |
530 | cERROR(1, |
531 | ("search entry %p began after end of SMB %p old entry %p", | |
3870253e | 532 | new_entry, end_of_smb, old_entry)); |
1da177e4 | 533 | return NULL; |
4523cc30 | 534 | } else if (((level == SMB_FIND_FILE_INFO_STANDARD) && |
3870253e SF |
535 | (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) |
536 | || ((level != SMB_FIND_FILE_INFO_STANDARD) && | |
5bafd765 | 537 | (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) { |
3870253e | 538 | cERROR(1, ("search entry %p extends after end of SMB %p", |
09d1db5c SF |
539 | new_entry, end_of_smb)); |
540 | return NULL; | |
3870253e | 541 | } else |
1da177e4 LT |
542 | return new_entry; |
543 | ||
544 | } | |
545 | ||
546 | #define UNICODE_DOT cpu_to_le16(0x2e) | |
547 | ||
548 | /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */ | |
549 | static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile) | |
550 | { | |
551 | int rc = 0; | |
3870253e SF |
552 | char *filename = NULL; |
553 | int len = 0; | |
1da177e4 | 554 | |
4523cc30 | 555 | if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
556 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
557 | filename = &pFindData->FileName[0]; | |
4523cc30 | 558 | if (cfile->srch_inf.unicode) { |
1da177e4 LT |
559 | len = cifs_unicode_bytelen(filename); |
560 | } else { | |
561 | /* BB should we make this strnlen of PATH_MAX? */ | |
562 | len = strnlen(filename, 5); | |
563 | } | |
4523cc30 | 564 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 565 | FILE_DIRECTORY_INFO * pFindData = |
1da177e4 LT |
566 | (FILE_DIRECTORY_INFO *)current_entry; |
567 | filename = &pFindData->FileName[0]; | |
568 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 569 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 570 | SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 571 | FILE_FULL_DIRECTORY_INFO * pFindData = |
1da177e4 LT |
572 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
573 | filename = &pFindData->FileName[0]; | |
574 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 575 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 576 | SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 577 | SEARCH_ID_FULL_DIR_INFO * pFindData = |
1da177e4 LT |
578 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
579 | filename = &pFindData->FileName[0]; | |
580 | len = le32_to_cpu(pFindData->FileNameLength); | |
3870253e | 581 | } else if (cfile->srch_inf.info_level == |
5bafd765 | 582 | SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 583 | FILE_BOTH_DIRECTORY_INFO * pFindData = |
1da177e4 LT |
584 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
585 | filename = &pFindData->FileName[0]; | |
586 | len = le32_to_cpu(pFindData->FileNameLength); | |
4523cc30 | 587 | } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
588 | FIND_FILE_STANDARD_INFO * pFindData = |
589 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
590 | filename = &pFindData->FileName[0]; | |
5ddaa683 | 591 | len = pFindData->FileNameLength; |
1da177e4 | 592 | } else { |
790fe579 SF |
593 | cFYI(1, ("Unknown findfirst level %d", |
594 | cfile->srch_inf.info_level)); | |
1da177e4 LT |
595 | } |
596 | ||
4523cc30 SF |
597 | if (filename) { |
598 | if (cfile->srch_inf.unicode) { | |
1da177e4 | 599 | __le16 *ufilename = (__le16 *)filename; |
4523cc30 | 600 | if (len == 2) { |
1da177e4 | 601 | /* check for . */ |
4523cc30 | 602 | if (ufilename[0] == UNICODE_DOT) |
1da177e4 | 603 | rc = 1; |
4523cc30 | 604 | } else if (len == 4) { |
1da177e4 | 605 | /* check for .. */ |
4523cc30 | 606 | if ((ufilename[0] == UNICODE_DOT) |
3870253e | 607 | && (ufilename[1] == UNICODE_DOT)) |
1da177e4 LT |
608 | rc = 2; |
609 | } | |
610 | } else /* ASCII */ { | |
4523cc30 | 611 | if (len == 1) { |
3870253e | 612 | if (filename[0] == '.') |
1da177e4 | 613 | rc = 1; |
4523cc30 | 614 | } else if (len == 2) { |
790fe579 | 615 | if ((filename[0] == '.') && (filename[1] == '.')) |
1da177e4 LT |
616 | rc = 2; |
617 | } | |
618 | } | |
619 | } | |
620 | ||
621 | return rc; | |
622 | } | |
623 | ||
eafe8701 SF |
624 | /* Check if directory that we are searching has changed so we can decide |
625 | whether we can use the cached search results from the previous search */ | |
3870253e | 626 | static int is_dir_changed(struct file *file) |
eafe8701 | 627 | { |
c33f8d32 CH |
628 | struct inode *inode = file->f_path.dentry->d_inode; |
629 | struct cifsInodeInfo *cifsInfo = CIFS_I(inode); | |
eafe8701 | 630 | |
c33f8d32 | 631 | if (cifsInfo->time == 0) |
eafe8701 SF |
632 | return 1; /* directory was changed, perhaps due to unlink */ |
633 | else | |
634 | return 0; | |
635 | ||
636 | } | |
637 | ||
1da177e4 LT |
638 | /* find the corresponding entry in the search */ |
639 | /* Note that the SMB server returns search entries for . and .. which | |
640 | complicates logic here if we choose to parse for them and we do not | |
641 | assume that they are located in the findfirst return buffer.*/ | |
642 | /* We start counting in the buffer with entry 2 and increment for every | |
643 | entry (do not increment for . or .. entry) */ | |
644 | static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon, | |
3870253e | 645 | struct file *file, char **ppCurrentEntry, int *num_to_ret) |
1da177e4 LT |
646 | { |
647 | int rc = 0; | |
648 | int pos_in_buf = 0; | |
649 | loff_t first_entry_in_buffer; | |
650 | loff_t index_to_find = file->f_pos; | |
3870253e | 651 | struct cifsFileInfo *cifsFile = file->private_data; |
1da177e4 | 652 | /* check if index in the buffer */ |
50c2f753 | 653 | |
3870253e | 654 | if ((cifsFile == NULL) || (ppCurrentEntry == NULL) || |
eafe8701 | 655 | (num_to_ret == NULL)) |
1da177e4 | 656 | return -ENOENT; |
50c2f753 | 657 | |
1da177e4 | 658 | *ppCurrentEntry = NULL; |
3870253e SF |
659 | first_entry_in_buffer = |
660 | cifsFile->srch_inf.index_of_last_entry - | |
1da177e4 | 661 | cifsFile->srch_inf.entries_in_buffer; |
60808233 SF |
662 | |
663 | /* if first entry in buf is zero then is first buffer | |
664 | in search response data which means it is likely . and .. | |
665 | will be in this buffer, although some servers do not return | |
666 | . and .. for the root of a drive and for those we need | |
667 | to start two entries earlier */ | |
668 | ||
3979877e SF |
669 | #ifdef CONFIG_CIFS_DEBUG2 |
670 | dump_cifs_file_struct(file, "In fce "); | |
671 | #endif | |
3870253e SF |
672 | if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) && |
673 | is_dir_changed(file)) || | |
eafe8701 | 674 | (index_to_find < first_entry_in_buffer)) { |
1da177e4 | 675 | /* close and restart search */ |
790fe579 | 676 | cFYI(1, ("search backing up - close and restart search")); |
1da177e4 LT |
677 | cifsFile->invalidHandle = TRUE; |
678 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
679 | kfree(cifsFile->search_resume_name); | |
680 | cifsFile->search_resume_name = NULL; | |
4523cc30 | 681 | if (cifsFile->srch_inf.ntwrk_buf_start) { |
790fe579 | 682 | cFYI(1, ("freeing SMB ff cache buf on search rewind")); |
4523cc30 | 683 | if (cifsFile->srch_inf.smallBuf) |
d47d7c1a SF |
684 | cifs_small_buf_release(cifsFile->srch_inf. |
685 | ntwrk_buf_start); | |
686 | else | |
687 | cifs_buf_release(cifsFile->srch_inf. | |
688 | ntwrk_buf_start); | |
1da177e4 | 689 | } |
3870253e | 690 | rc = initiate_cifs_search(xid, file); |
4523cc30 | 691 | if (rc) { |
790fe579 SF |
692 | cFYI(1, ("error %d reinitiating a search on rewind", |
693 | rc)); | |
1da177e4 LT |
694 | return rc; |
695 | } | |
696 | } | |
697 | ||
3870253e SF |
698 | while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) && |
699 | (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)) { | |
790fe579 | 700 | cFYI(1, ("calling findnext2")); |
3870253e | 701 | rc = CIFSFindNext(xid, pTcon, cifsFile->netfid, |
dfb7533b | 702 | &cifsFile->srch_inf); |
4523cc30 | 703 | if (rc) |
1da177e4 LT |
704 | return -ENOENT; |
705 | } | |
4523cc30 | 706 | if (index_to_find < cifsFile->srch_inf.index_of_last_entry) { |
1da177e4 LT |
707 | /* we found the buffer that contains the entry */ |
708 | /* scan and find it */ | |
709 | int i; | |
3870253e SF |
710 | char *current_entry; |
711 | char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + | |
1da177e4 LT |
712 | smbCalcSize((struct smb_hdr *) |
713 | cifsFile->srch_inf.ntwrk_buf_start); | |
60808233 SF |
714 | |
715 | current_entry = cifsFile->srch_inf.srch_entries_start; | |
1da177e4 LT |
716 | first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry |
717 | - cifsFile->srch_inf.entries_in_buffer; | |
718 | pos_in_buf = index_to_find - first_entry_in_buffer; | |
790fe579 | 719 | cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf)); |
5bafd765 | 720 | |
50c2f753 | 721 | for (i=0; (i < (pos_in_buf)) && (current_entry != NULL); i++) { |
dfb7533b | 722 | /* go entry by entry figuring out which is first */ |
3870253e | 723 | current_entry = nxt_dir_entry(current_entry, end_of_smb, |
5bafd765 | 724 | cifsFile->srch_inf.info_level); |
1da177e4 | 725 | } |
790fe579 | 726 | if ((current_entry == NULL) && (i < pos_in_buf)) { |
1da177e4 | 727 | /* BB fixme - check if we should flag this error */ |
3870253e | 728 | cERROR(1, ("reached end of buf searching for pos in buf" |
1da177e4 | 729 | " %d index to find %lld rc %d", |
3870253e | 730 | pos_in_buf, index_to_find, rc)); |
1da177e4 LT |
731 | } |
732 | rc = 0; | |
733 | *ppCurrentEntry = current_entry; | |
734 | } else { | |
790fe579 | 735 | cFYI(1, ("index not in buffer - could not findnext into it")); |
1da177e4 LT |
736 | return 0; |
737 | } | |
738 | ||
790fe579 SF |
739 | if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) { |
740 | cFYI(1, ("can not return entries pos_in_buf beyond last")); | |
1da177e4 LT |
741 | *num_to_ret = 0; |
742 | } else | |
743 | *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf; | |
1da177e4 LT |
744 | |
745 | return rc; | |
746 | } | |
747 | ||
748 | /* inode num, inode type and filename returned */ | |
749 | static int cifs_get_name_from_search_buf(struct qstr *pqst, | |
750 | char *current_entry, __u16 level, unsigned int unicode, | |
3870253e | 751 | struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum) |
1da177e4 LT |
752 | { |
753 | int rc = 0; | |
754 | unsigned int len = 0; | |
3870253e SF |
755 | char *filename; |
756 | struct nls_table *nlt = cifs_sb->local_nls; | |
1da177e4 LT |
757 | |
758 | *pinum = 0; | |
759 | ||
790fe579 | 760 | if (level == SMB_FIND_FILE_UNIX) { |
3870253e | 761 | FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry; |
1da177e4 LT |
762 | |
763 | filename = &pFindData->FileName[0]; | |
790fe579 | 764 | if (unicode) { |
1da177e4 LT |
765 | len = cifs_unicode_bytelen(filename); |
766 | } else { | |
767 | /* BB should we make this strnlen of PATH_MAX? */ | |
768 | len = strnlen(filename, PATH_MAX); | |
769 | } | |
770 | ||
3870253e | 771 | /* BB fixme - hash low and high 32 bits if not 64 bit arch BB */ |
790fe579 | 772 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
1da177e4 | 773 | *pinum = pFindData->UniqueId; |
790fe579 | 774 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 775 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
776 | (FILE_DIRECTORY_INFO *)current_entry; |
777 | filename = &pFindData->FileName[0]; | |
778 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 779 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 780 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
781 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
782 | filename = &pFindData->FileName[0]; | |
783 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 784 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 785 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
786 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
787 | filename = &pFindData->FileName[0]; | |
788 | len = le32_to_cpu(pFindData->FileNameLength); | |
789 | *pinum = pFindData->UniqueId; | |
790fe579 | 790 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
3870253e | 791 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
792 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
793 | filename = &pFindData->FileName[0]; | |
794 | len = le32_to_cpu(pFindData->FileNameLength); | |
790fe579 | 795 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
5bafd765 SF |
796 | FIND_FILE_STANDARD_INFO * pFindData = |
797 | (FIND_FILE_STANDARD_INFO *)current_entry; | |
798 | filename = &pFindData->FileName[0]; | |
799 | /* one byte length, no name conversion */ | |
800 | len = (unsigned int)pFindData->FileNameLength; | |
1da177e4 | 801 | } else { |
790fe579 | 802 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
803 | return -EINVAL; |
804 | } | |
5bafd765 | 805 | |
790fe579 | 806 | if (len > max_len) { |
3870253e | 807 | cERROR(1, ("bad search response length %d past smb end", len)); |
5bafd765 SF |
808 | return -EINVAL; |
809 | } | |
810 | ||
790fe579 | 811 | if (unicode) { |
1da177e4 LT |
812 | /* BB fixme - test with long names */ |
813 | /* Note converted filename can be longer than in unicode */ | |
790fe579 | 814 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
6a0b4824 SF |
815 | pqst->len = cifs_convertUCSpath((char *)pqst->name, |
816 | (__le16 *)filename, len/2, nlt); | |
817 | else | |
6a0b4824 | 818 | pqst->len = cifs_strfromUCS_le((char *)pqst->name, |
3870253e | 819 | (__le16 *)filename, len/2, nlt); |
1da177e4 LT |
820 | } else { |
821 | pqst->name = filename; | |
822 | pqst->len = len; | |
823 | } | |
3870253e | 824 | pqst->hash = full_name_hash(pqst->name, pqst->len); |
790fe579 | 825 | /* cFYI(1, ("filldir on %s",pqst->name)); */ |
1da177e4 LT |
826 | return rc; |
827 | } | |
828 | ||
829 | static int cifs_filldir(char *pfindEntry, struct file *file, | |
5bafd765 | 830 | filldir_t filldir, void *direntry, char *scratch_buf, int max_len) |
1da177e4 LT |
831 | { |
832 | int rc = 0; | |
833 | struct qstr qstring; | |
3870253e | 834 | struct cifsFileInfo *pCifsF; |
2c2130e1 | 835 | unsigned int obj_type; |
1da177e4 | 836 | ino_t inum; |
3870253e | 837 | struct cifs_sb_info *cifs_sb; |
1da177e4 LT |
838 | struct inode *tmp_inode; |
839 | struct dentry *tmp_dentry; | |
840 | ||
841 | /* get filename and len into qstring */ | |
842 | /* get dentry */ | |
843 | /* decide whether to create and populate ionde */ | |
790fe579 | 844 | if ((direntry == NULL) || (file == NULL)) |
1da177e4 LT |
845 | return -EINVAL; |
846 | ||
847 | pCifsF = file->private_data; | |
50c2f753 | 848 | |
790fe579 | 849 | if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL)) |
1da177e4 LT |
850 | return -ENOENT; |
851 | ||
3870253e | 852 | rc = cifs_entry_is_dot(pfindEntry, pCifsF); |
60808233 | 853 | /* skip . and .. since we added them first */ |
790fe579 | 854 | if (rc != 0) |
60808233 SF |
855 | return 0; |
856 | ||
e6a00296 | 857 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 LT |
858 | |
859 | qstring.name = scratch_buf; | |
3870253e | 860 | rc = cifs_get_name_from_search_buf(&qstring, pfindEntry, |
1da177e4 | 861 | pCifsF->srch_inf.info_level, |
3870253e | 862 | pCifsF->srch_inf.unicode, cifs_sb, |
5bafd765 | 863 | max_len, |
1da177e4 LT |
864 | &inum /* returned */); |
865 | ||
790fe579 | 866 | if (rc) |
1da177e4 LT |
867 | return rc; |
868 | ||
3870253e | 869 | rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry); |
790fe579 | 870 | if ((tmp_inode == NULL) || (tmp_dentry == NULL)) |
1da177e4 LT |
871 | return -ENOMEM; |
872 | ||
790fe579 | 873 | if (rc) { |
1da177e4 | 874 | /* inode created, we need to hash it with right inode number */ |
790fe579 | 875 | if (inum != 0) { |
3870253e SF |
876 | /* BB fixme - hash the 2 32 quantities bits together if |
877 | * necessary BB */ | |
1da177e4 LT |
878 | tmp_inode->i_ino = inum; |
879 | } | |
880 | insert_inode_hash(tmp_inode); | |
881 | } | |
882 | ||
966ca923 SF |
883 | /* we pass in rc below, indicating whether it is a new inode, |
884 | so we can figure out whether to invalidate the inode cached | |
885 | data if the file has changed */ | |
790fe579 | 886 | if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX) |
966ca923 | 887 | unix_fill_in_inode(tmp_inode, |
5bafd765 SF |
888 | (FILE_UNIX_INFO *)pfindEntry, |
889 | &obj_type, rc); | |
790fe579 | 890 | else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) |
5bafd765 SF |
891 | fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */, |
892 | pfindEntry, &obj_type, rc); | |
893 | else | |
894 | fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc); | |
b835bebe | 895 | |
790fe579 | 896 | if (rc) /* new inode - needs to be tied to dentry */ { |
b835bebe | 897 | d_instantiate(tmp_dentry, tmp_inode); |
790fe579 | 898 | if (rc == 2) |
b835bebe SF |
899 | d_rehash(tmp_dentry); |
900 | } | |
50c2f753 | 901 | |
3870253e SF |
902 | |
903 | rc = filldir(direntry, qstring.name, qstring.len, file->f_pos, | |
904 | tmp_inode->i_ino, obj_type); | |
790fe579 SF |
905 | if (rc) { |
906 | cFYI(1, ("filldir rc = %d", rc)); | |
7ca85ba7 SF |
907 | /* we can not return filldir errors to the caller |
908 | since they are "normal" when the stat blocksize | |
909 | is too small - we return remapped error instead */ | |
910 | rc = -EOVERFLOW; | |
1da177e4 LT |
911 | } |
912 | ||
913 | dput(tmp_dentry); | |
914 | return rc; | |
915 | } | |
916 | ||
917 | static int cifs_save_resume_key(const char *current_entry, | |
918 | struct cifsFileInfo *cifsFile) | |
919 | { | |
920 | int rc = 0; | |
921 | unsigned int len = 0; | |
922 | __u16 level; | |
3870253e | 923 | char *filename; |
1da177e4 | 924 | |
790fe579 | 925 | if ((cifsFile == NULL) || (current_entry == NULL)) |
1da177e4 LT |
926 | return -EINVAL; |
927 | ||
928 | level = cifsFile->srch_inf.info_level; | |
929 | ||
790fe579 | 930 | if (level == SMB_FIND_FILE_UNIX) { |
1da177e4 LT |
931 | FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry; |
932 | ||
933 | filename = &pFindData->FileName[0]; | |
790fe579 | 934 | if (cifsFile->srch_inf.unicode) { |
1da177e4 LT |
935 | len = cifs_unicode_bytelen(filename); |
936 | } else { | |
937 | /* BB should we make this strnlen of PATH_MAX? */ | |
938 | len = strnlen(filename, PATH_MAX); | |
939 | } | |
940 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; | |
790fe579 | 941 | } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) { |
3870253e | 942 | FILE_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
943 | (FILE_DIRECTORY_INFO *)current_entry; |
944 | filename = &pFindData->FileName[0]; | |
945 | len = le32_to_cpu(pFindData->FileNameLength); | |
946 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 947 | } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) { |
3870253e | 948 | FILE_FULL_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
949 | (FILE_FULL_DIRECTORY_INFO *)current_entry; |
950 | filename = &pFindData->FileName[0]; | |
951 | len = le32_to_cpu(pFindData->FileNameLength); | |
952 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 953 | } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) { |
3870253e | 954 | SEARCH_ID_FULL_DIR_INFO *pFindData = |
1da177e4 LT |
955 | (SEARCH_ID_FULL_DIR_INFO *)current_entry; |
956 | filename = &pFindData->FileName[0]; | |
957 | len = le32_to_cpu(pFindData->FileNameLength); | |
958 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 959 | } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) { |
50c2f753 | 960 | FILE_BOTH_DIRECTORY_INFO *pFindData = |
1da177e4 LT |
961 | (FILE_BOTH_DIRECTORY_INFO *)current_entry; |
962 | filename = &pFindData->FileName[0]; | |
963 | len = le32_to_cpu(pFindData->FileNameLength); | |
964 | cifsFile->srch_inf.resume_key = pFindData->FileIndex; | |
790fe579 | 965 | } else if (level == SMB_FIND_FILE_INFO_STANDARD) { |
3870253e | 966 | FIND_FILE_STANDARD_INFO *pFindData = |
5bafd765 SF |
967 | (FIND_FILE_STANDARD_INFO *)current_entry; |
968 | filename = &pFindData->FileName[0]; | |
969 | /* one byte length, no name conversion */ | |
970 | len = (unsigned int)pFindData->FileNameLength; | |
203cf2fc | 971 | cifsFile->srch_inf.resume_key = pFindData->ResumeKey; |
1da177e4 | 972 | } else { |
790fe579 | 973 | cFYI(1, ("Unknown findfirst level %d", level)); |
1da177e4 LT |
974 | return -EINVAL; |
975 | } | |
976 | cifsFile->srch_inf.resume_name_len = len; | |
977 | cifsFile->srch_inf.presume_name = filename; | |
978 | return rc; | |
979 | } | |
980 | ||
981 | int cifs_readdir(struct file *file, void *direntry, filldir_t filldir) | |
982 | { | |
983 | int rc = 0; | |
3870253e | 984 | int xid, i; |
1da177e4 LT |
985 | struct cifs_sb_info *cifs_sb; |
986 | struct cifsTconInfo *pTcon; | |
987 | struct cifsFileInfo *cifsFile = NULL; | |
3870253e | 988 | char *current_entry; |
1da177e4 | 989 | int num_to_fill = 0; |
3870253e | 990 | char *tmp_buf = NULL; |
50c2f753 | 991 | char *end_of_smb; |
5bafd765 | 992 | int max_len; |
1da177e4 LT |
993 | |
994 | xid = GetXid(); | |
995 | ||
e6a00296 | 996 | cifs_sb = CIFS_SB(file->f_path.dentry->d_sb); |
1da177e4 | 997 | pTcon = cifs_sb->tcon; |
790fe579 | 998 | if (pTcon == NULL) |
1da177e4 LT |
999 | return -EINVAL; |
1000 | ||
1da177e4 LT |
1001 | switch ((int) file->f_pos) { |
1002 | case 0: | |
60808233 | 1003 | if (filldir(direntry, ".", 1, file->f_pos, |
e6a00296 | 1004 | file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) { |
60808233 | 1005 | cERROR(1, ("Filldir for current dir failed")); |
1da177e4 LT |
1006 | rc = -ENOMEM; |
1007 | break; | |
1008 | } | |
60808233 | 1009 | file->f_pos++; |
1da177e4 | 1010 | case 1: |
60808233 | 1011 | if (filldir(direntry, "..", 2, file->f_pos, |
e6a00296 | 1012 | file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) { |
26a21b98 | 1013 | cERROR(1, ("Filldir for parent dir failed")); |
1da177e4 LT |
1014 | rc = -ENOMEM; |
1015 | break; | |
1016 | } | |
60808233 SF |
1017 | file->f_pos++; |
1018 | default: | |
3870253e SF |
1019 | /* 1) If search is active, |
1020 | is in current search buffer? | |
1da177e4 LT |
1021 | if it before then restart search |
1022 | if after then keep searching till find it */ | |
1023 | ||
790fe579 | 1024 | if (file->private_data == NULL) { |
3870253e | 1025 | rc = initiate_cifs_search(xid, file); |
790fe579 SF |
1026 | cFYI(1, ("initiate cifs search rc %d", rc)); |
1027 | if (rc) { | |
1da177e4 LT |
1028 | FreeXid(xid); |
1029 | return rc; | |
1030 | } | |
1031 | } | |
790fe579 | 1032 | if (file->private_data == NULL) { |
1da177e4 LT |
1033 | rc = -EINVAL; |
1034 | FreeXid(xid); | |
1035 | return rc; | |
1036 | } | |
1037 | cifsFile = file->private_data; | |
1038 | if (cifsFile->srch_inf.endOfSearch) { | |
790fe579 | 1039 | if (cifsFile->srch_inf.emptyDir) { |
1da177e4 LT |
1040 | cFYI(1, ("End of search, empty dir")); |
1041 | rc = 0; | |
1042 | break; | |
1043 | } | |
1044 | } /* else { | |
1045 | cifsFile->invalidHandle = TRUE; | |
1046 | CIFSFindClose(xid, pTcon, cifsFile->netfid); | |
3870253e | 1047 | } |
1da177e4 LT |
1048 | kfree(cifsFile->search_resume_name); |
1049 | cifsFile->search_resume_name = NULL; */ | |
1050 | ||
3870253e SF |
1051 | rc = find_cifs_entry(xid, pTcon, file, |
1052 | ¤t_entry, &num_to_fill); | |
790fe579 SF |
1053 | if (rc) { |
1054 | cFYI(1, ("fce error %d", rc)); | |
1da177e4 LT |
1055 | goto rddir2_exit; |
1056 | } else if (current_entry != NULL) { | |
790fe579 | 1057 | cFYI(1, ("entry %lld found", file->f_pos)); |
1da177e4 | 1058 | } else { |
790fe579 | 1059 | cFYI(1, ("could not find entry")); |
1da177e4 LT |
1060 | goto rddir2_exit; |
1061 | } | |
790fe579 SF |
1062 | cFYI(1, ("loop through %d times filling dir for net buf %p", |
1063 | num_to_fill, cifsFile->srch_inf.ntwrk_buf_start)); | |
5bafd765 SF |
1064 | max_len = smbCalcSize((struct smb_hdr *) |
1065 | cifsFile->srch_inf.ntwrk_buf_start); | |
1066 | end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len; | |
1067 | ||
6a0b4824 SF |
1068 | /* To be safe - for UCS to UTF-8 with strings loaded |
1069 | with the rare long characters alloc more to account for | |
1070 | such multibyte target UTF-8 characters. cifs_unicode.c, | |
1071 | which actually does the conversion, has the same limit */ | |
1072 | tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL); | |
790fe579 SF |
1073 | for (i = 0; (i < num_to_fill) && (rc == 0); i++) { |
1074 | if (current_entry == NULL) { | |
1da177e4 | 1075 | /* evaluate whether this case is an error */ |
26f57364 | 1076 | cERROR(1, ("past SMB end, num to fill %d i %d", |
1da177e4 LT |
1077 | num_to_fill, i)); |
1078 | break; | |
1079 | } | |
60808233 SF |
1080 | /* if buggy server returns . and .. late do |
1081 | we want to check for that here? */ | |
5bafd765 SF |
1082 | rc = cifs_filldir(current_entry, file, |
1083 | filldir, direntry, tmp_buf, max_len); | |
790fe579 | 1084 | if (rc == -EOVERFLOW) { |
7ca85ba7 SF |
1085 | rc = 0; |
1086 | break; | |
1087 | } | |
1088 | ||
1da177e4 | 1089 | file->f_pos++; |
790fe579 | 1090 | if (file->f_pos == |
3979877e | 1091 | cifsFile->srch_inf.index_of_last_entry) { |
790fe579 SF |
1092 | cFYI(1, ("last entry in buf at pos %lld %s", |
1093 | file->f_pos, tmp_buf)); | |
1094 | cifs_save_resume_key(current_entry, cifsFile); | |
1da177e4 | 1095 | break; |
790fe579 SF |
1096 | } else |
1097 | current_entry = | |
5bafd765 SF |
1098 | nxt_dir_entry(current_entry, end_of_smb, |
1099 | cifsFile->srch_inf.info_level); | |
1da177e4 LT |
1100 | } |
1101 | kfree(tmp_buf); | |
1102 | break; | |
1103 | } /* end switch */ | |
1104 | ||
1105 | rddir2_exit: | |
1da177e4 LT |
1106 | FreeXid(xid); |
1107 | return rc; | |
1108 | } |