4 * Directory search handling
6 * Copyright (C) International Business Machines Corp., 2004, 2007
7 * Author(s): Steve French (sfrench@us.ibm.com)
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.
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.
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
24 #include <linux/pagemap.h>
25 #include <linux/stat.h>
28 #include "cifsproto.h"
29 #include "cifs_unicode.h"
30 #include "cifs_debug.h"
31 #include "cifs_fs_sb.h"
34 #ifdef CONFIG_CIFS_DEBUG2
35 static void dump_cifs_file_struct(struct file *file, char *label)
37 struct cifsFileInfo *cf;
40 cf = file->private_data;
42 cFYI(1, ("empty cifs private file data"));
45 if (cf->invalidHandle) {
46 cFYI(1, ("invalid handle"));
48 if (cf->srch_inf.endOfSearch) {
49 cFYI(1, ("end of search"));
51 if (cf->srch_inf.emptyDir) {
52 cFYI(1, ("empty dir"));
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)
63 struct dentry *tmp_dentry;
64 struct cifs_sb_info *cifs_sb;
65 struct cifsTconInfo *pTcon;
68 cFYI(1, ("For %s", qstring->name));
69 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
70 pTcon = cifs_sb->tcon;
72 qstring->hash = full_name_hash(qstring->name, qstring->len);
73 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
75 cFYI(0, ("existing dentry with inode 0x%p",
76 tmp_dentry->d_inode));
77 *ptmp_inode = tmp_dentry->d_inode;
78 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
79 if (*ptmp_inode == NULL) {
80 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
81 if (*ptmp_inode == NULL)
85 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
86 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
88 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
89 if (tmp_dentry == NULL) {
90 cERROR(1, ("Failed allocating dentry"));
95 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
97 tmp_dentry->d_op = &cifs_ci_dentry_ops;
99 tmp_dentry->d_op = &cifs_dentry_ops;
100 if (*ptmp_inode == NULL)
102 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
103 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
107 tmp_dentry->d_time = jiffies;
108 *pnew_dentry = tmp_dentry;
112 static void AdjustForTZ(struct cifsTconInfo *tcon, struct inode *inode)
114 if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
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;
123 static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
124 char *buf, int *pobject_type, int isNewInode)
127 struct timespec local_mtime;
129 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
130 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
132 __u64 allocation_size;
135 /* save mtime and size */
136 local_mtime = tmp_inode->i_mtime;
137 local_size = tmp_inode->i_size;
140 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
142 attr = le32_to_cpu(pfindData->ExtFileAttributes);
143 allocation_size = le64_to_cpu(pfindData->AllocationSize);
144 end_of_file = le64_to_cpu(pfindData->EndOfFile);
146 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
148 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
150 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
151 } else { /* legacy, OS2 and DOS style */
152 /* struct timespec ts;*/
153 FIND_FILE_STANDARD_INFO * pfindData =
154 (FIND_FILE_STANDARD_INFO *)buf;
156 tmp_inode->i_mtime = cnvrtDosUnixTm(
157 le16_to_cpu(pfindData->LastWriteDate),
158 le16_to_cpu(pfindData->LastWriteTime));
159 tmp_inode->i_atime = cnvrtDosUnixTm(
160 le16_to_cpu(pfindData->LastAccessDate),
161 le16_to_cpu(pfindData->LastAccessTime));
162 tmp_inode->i_ctime = cnvrtDosUnixTm(
163 le16_to_cpu(pfindData->LastWriteDate),
164 le16_to_cpu(pfindData->LastWriteTime));
165 AdjustForTZ(cifs_sb->tcon, tmp_inode);
166 attr = le16_to_cpu(pfindData->Attributes);
167 allocation_size = le32_to_cpu(pfindData->AllocationSize);
168 end_of_file = le32_to_cpu(pfindData->DataSize);
171 /* Linux can not store file creation time unfortunately so ignore it */
173 cifsInfo->cifsAttrs = attr;
174 cifsInfo->time = jiffies;
176 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
177 /* 2767 perms - indicate mandatory locking */
178 /* BB fill in uid and gid here? with help from winbind?
179 or retrieve from NTFS stream extended attribute */
180 if (atomic_read(&cifsInfo->inUse) == 0) {
181 tmp_inode->i_uid = cifs_sb->mnt_uid;
182 tmp_inode->i_gid = cifs_sb->mnt_gid;
183 /* set default mode. will override for dirs below */
184 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
186 /* mask off the type bits since it gets set
187 below and we do not want to get two type
189 tmp_inode->i_mode &= ~S_IFMT;
192 if (attr & ATTR_DIRECTORY) {
193 *pobject_type = DT_DIR;
194 /* override default perms since we do not lock dirs */
195 if (atomic_read(&cifsInfo->inUse) == 0) {
196 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
198 tmp_inode->i_mode |= S_IFDIR;
199 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
200 (attr & ATTR_SYSTEM)) {
201 if (end_of_file == 0) {
202 *pobject_type = DT_FIFO;
203 tmp_inode->i_mode |= S_IFIFO;
205 /* rather than get the type here, we mark the
206 inode as needing revalidate and get the real type
207 (blk vs chr vs. symlink) later ie in lookup */
208 *pobject_type = DT_REG;
209 tmp_inode->i_mode |= S_IFREG;
212 /* we no longer mark these because we could not follow them */
213 /* } else if (attr & ATTR_REPARSE) {
214 *pobject_type = DT_LNK;
215 tmp_inode->i_mode |= S_IFLNK; */
217 *pobject_type = DT_REG;
218 tmp_inode->i_mode |= S_IFREG;
219 if (attr & ATTR_READONLY)
220 tmp_inode->i_mode &= ~(S_IWUGO);
221 else if ((tmp_inode->i_mode & S_IWUGO) == 0)
222 /* the ATTR_READONLY flag may have been changed on */
223 /* server -- set any w bits allowed by mnt_file_mode */
224 tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
225 } /* could add code here - to validate if device or weird share type? */
227 /* can not fill in nlink here as in qpathinfo version and Unx search */
228 if (atomic_read(&cifsInfo->inUse) == 0) {
229 atomic_set(&cifsInfo->inUse, 1);
232 spin_lock(&tmp_inode->i_lock);
233 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
234 /* can not safely change the file size here if the
235 client is writing to it due to potential races */
236 i_size_write(tmp_inode, end_of_file);
238 /* 512 bytes (2**9) is the fake blocksize that must be used */
239 /* for this calculation, even though the reported blocksize is larger */
240 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
242 spin_unlock(&tmp_inode->i_lock);
244 if (allocation_size < end_of_file)
245 cFYI(1, ("May be sparse file, allocation less than file size"));
246 cFYI(1, ("File Size %ld and blocks %llu",
247 (unsigned long)tmp_inode->i_size,
248 (unsigned long long)tmp_inode->i_blocks));
249 if (S_ISREG(tmp_inode->i_mode)) {
250 cFYI(1, ("File inode"));
251 tmp_inode->i_op = &cifs_file_inode_ops;
252 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
253 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
254 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
256 tmp_inode->i_fop = &cifs_file_direct_ops;
257 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
258 tmp_inode->i_fop = &cifs_file_nobrl_ops;
260 tmp_inode->i_fop = &cifs_file_ops;
262 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
263 (cifs_sb->tcon->ses->server->maxBuf <
264 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
265 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
267 tmp_inode->i_data.a_ops = &cifs_addr_ops;
270 return; /* No sense invalidating pages for new inode
271 since have not started caching readahead file
274 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
275 (local_size == tmp_inode->i_size)) {
276 cFYI(1, ("inode exists but unchanged"));
278 /* file may have changed on server */
279 cFYI(1, ("invalidate inode, readdir detected change"));
280 invalidate_remote_inode(tmp_inode);
282 } else if (S_ISDIR(tmp_inode->i_mode)) {
283 cFYI(1, ("Directory inode"));
284 tmp_inode->i_op = &cifs_dir_inode_ops;
285 tmp_inode->i_fop = &cifs_dir_ops;
286 } else if (S_ISLNK(tmp_inode->i_mode)) {
287 cFYI(1, ("Symbolic Link inode"));
288 tmp_inode->i_op = &cifs_symlink_inode_ops;
290 cFYI(1, ("Init special inode"));
291 init_special_inode(tmp_inode, tmp_inode->i_mode,
296 static void unix_fill_in_inode(struct inode *tmp_inode,
297 FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
300 struct timespec local_mtime;
302 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
303 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
305 __u32 type = le32_to_cpu(pfindData->Type);
306 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
307 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
308 cifsInfo->time = jiffies;
309 atomic_inc(&cifsInfo->inUse);
311 /* save mtime and size */
312 local_mtime = tmp_inode->i_mtime;
313 local_size = tmp_inode->i_size;
316 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
318 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
320 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
322 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
323 /* since we set the inode type below we need to mask off type
324 to avoid strange results if bits above were corrupt */
325 tmp_inode->i_mode &= ~S_IFMT;
326 if (type == UNIX_FILE) {
327 *pobject_type = DT_REG;
328 tmp_inode->i_mode |= S_IFREG;
329 } else if (type == UNIX_SYMLINK) {
330 *pobject_type = DT_LNK;
331 tmp_inode->i_mode |= S_IFLNK;
332 } else if (type == UNIX_DIR) {
333 *pobject_type = DT_DIR;
334 tmp_inode->i_mode |= S_IFDIR;
335 } else if (type == UNIX_CHARDEV) {
336 *pobject_type = DT_CHR;
337 tmp_inode->i_mode |= S_IFCHR;
338 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
339 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
340 } else if (type == UNIX_BLOCKDEV) {
341 *pobject_type = DT_BLK;
342 tmp_inode->i_mode |= S_IFBLK;
343 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
344 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
345 } else if (type == UNIX_FIFO) {
346 *pobject_type = DT_FIFO;
347 tmp_inode->i_mode |= S_IFIFO;
348 } else if (type == UNIX_SOCKET) {
349 *pobject_type = DT_SOCK;
350 tmp_inode->i_mode |= S_IFSOCK;
352 /* safest to just call it a file */
353 *pobject_type = DT_REG;
354 tmp_inode->i_mode |= S_IFREG;
355 cFYI(1, ("unknown inode type %d", type));
358 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
359 tmp_inode->i_uid = cifs_sb->mnt_uid;
361 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
362 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
363 tmp_inode->i_gid = cifs_sb->mnt_gid;
365 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
366 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
368 spin_lock(&tmp_inode->i_lock);
369 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
370 /* can not safely change the file size here if the
371 client is writing to it due to potential races */
372 i_size_write(tmp_inode, end_of_file);
374 /* 512 bytes (2**9) is the fake blocksize that must be used */
375 /* for this calculation, not the real blocksize */
376 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
378 spin_unlock(&tmp_inode->i_lock);
380 if (S_ISREG(tmp_inode->i_mode)) {
381 cFYI(1, ("File inode"));
382 tmp_inode->i_op = &cifs_file_inode_ops;
384 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
385 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
386 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
388 tmp_inode->i_fop = &cifs_file_direct_ops;
389 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
390 tmp_inode->i_fop = &cifs_file_nobrl_ops;
392 tmp_inode->i_fop = &cifs_file_ops;
394 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
395 (cifs_sb->tcon->ses->server->maxBuf <
396 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
397 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
399 tmp_inode->i_data.a_ops = &cifs_addr_ops;
402 return; /* No sense invalidating pages for new inode
403 since we have not started caching readahead
404 file data for it yet */
406 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
407 (local_size == tmp_inode->i_size)) {
408 cFYI(1, ("inode exists but unchanged"));
410 /* file may have changed on server */
411 cFYI(1, ("invalidate inode, readdir detected change"));
412 invalidate_remote_inode(tmp_inode);
414 } else if (S_ISDIR(tmp_inode->i_mode)) {
415 cFYI(1, ("Directory inode"));
416 tmp_inode->i_op = &cifs_dir_inode_ops;
417 tmp_inode->i_fop = &cifs_dir_ops;
418 } else if (S_ISLNK(tmp_inode->i_mode)) {
419 cFYI(1, ("Symbolic Link inode"));
420 tmp_inode->i_op = &cifs_symlink_inode_ops;
421 /* tmp_inode->i_fop = *//* do not need to set to anything */
423 cFYI(1, ("Special inode"));
424 init_special_inode(tmp_inode, tmp_inode->i_mode,
429 static int initiate_cifs_search(const int xid, struct file *file)
433 struct cifsFileInfo *cifsFile;
434 struct cifs_sb_info *cifs_sb;
435 struct cifsTconInfo *pTcon;
437 if (file->private_data == NULL) {
439 kzalloc(sizeof(struct cifsFileInfo), GFP_KERNEL);
442 if (file->private_data == NULL)
444 cifsFile = file->private_data;
445 cifsFile->invalidHandle = TRUE;
446 cifsFile->srch_inf.endOfSearch = FALSE;
448 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
452 pTcon = cifs_sb->tcon;
456 full_path = build_path_from_dentry(file->f_path.dentry);
458 if (full_path == NULL) {
462 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
465 /* test for Unix extensions */
466 if (pTcon->ses->capabilities & CAP_UNIX) {
467 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
468 } else if ((pTcon->ses->capabilities &
469 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
470 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
471 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
472 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
473 } else /* not srvinos - BB fixme add check for backlevel? */ {
474 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
477 rc = CIFSFindFirst(xid, pTcon, full_path, cifs_sb->local_nls,
478 &cifsFile->netfid, &cifsFile->srch_inf,
479 cifs_sb->mnt_cifs_flags &
480 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
482 cifsFile->invalidHandle = FALSE;
483 if ((rc == -EOPNOTSUPP) &&
484 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
485 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
492 /* return length of unicode string in bytes */
493 static int cifs_unicode_bytelen(char *str)
496 __le16 * ustr = (__le16 *)str;
498 for (len = 0; len <= PATH_MAX; len++) {
502 cFYI(1, ("Unicode string longer than PATH_MAX found"));
506 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
509 FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
511 if (level == SMB_FIND_FILE_INFO_STANDARD) {
512 FIND_FILE_STANDARD_INFO * pfData;
513 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
515 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
516 pfData->FileNameLength;
518 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
519 cFYI(1, ("new entry %p old entry %p", new_entry, old_entry));
520 /* validate that new_entry is not past end of SMB */
521 if (new_entry >= end_of_smb) {
523 ("search entry %p began after end of SMB %p old entry %p",
524 new_entry, end_of_smb, old_entry));
526 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
527 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb))
528 || ((level != SMB_FIND_FILE_INFO_STANDARD) &&
529 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
530 cERROR(1, ("search entry %p extends after end of SMB %p",
531 new_entry, end_of_smb));
538 #define UNICODE_DOT cpu_to_le16(0x2e)
540 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
541 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
544 char *filename = NULL;
547 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
548 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
549 filename = &pFindData->FileName[0];
550 if (cfile->srch_inf.unicode) {
551 len = cifs_unicode_bytelen(filename);
553 /* BB should we make this strnlen of PATH_MAX? */
554 len = strnlen(filename, 5);
556 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
557 FILE_DIRECTORY_INFO * pFindData =
558 (FILE_DIRECTORY_INFO *)current_entry;
559 filename = &pFindData->FileName[0];
560 len = le32_to_cpu(pFindData->FileNameLength);
561 } else if (cfile->srch_inf.info_level ==
562 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
563 FILE_FULL_DIRECTORY_INFO * pFindData =
564 (FILE_FULL_DIRECTORY_INFO *)current_entry;
565 filename = &pFindData->FileName[0];
566 len = le32_to_cpu(pFindData->FileNameLength);
567 } else if (cfile->srch_inf.info_level ==
568 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
569 SEARCH_ID_FULL_DIR_INFO * pFindData =
570 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
571 filename = &pFindData->FileName[0];
572 len = le32_to_cpu(pFindData->FileNameLength);
573 } else if (cfile->srch_inf.info_level ==
574 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
575 FILE_BOTH_DIRECTORY_INFO * pFindData =
576 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
577 filename = &pFindData->FileName[0];
578 len = le32_to_cpu(pFindData->FileNameLength);
579 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
580 FIND_FILE_STANDARD_INFO * pFindData =
581 (FIND_FILE_STANDARD_INFO *)current_entry;
582 filename = &pFindData->FileName[0];
583 len = pFindData->FileNameLength;
585 cFYI(1, ("Unknown findfirst level %d",
586 cfile->srch_inf.info_level));
590 if (cfile->srch_inf.unicode) {
591 __le16 *ufilename = (__le16 *)filename;
594 if (ufilename[0] == UNICODE_DOT)
596 } else if (len == 4) {
598 if ((ufilename[0] == UNICODE_DOT)
599 && (ufilename[1] == UNICODE_DOT))
604 if (filename[0] == '.')
606 } else if (len == 2) {
607 if ((filename[0] == '.') && (filename[1] == '.'))
616 /* Check if directory that we are searching has changed so we can decide
617 whether we can use the cached search results from the previous search */
618 static int is_dir_changed(struct file *file)
620 struct inode *inode = file->f_path.dentry->d_inode;
621 struct cifsInodeInfo *cifsInfo = CIFS_I(inode);
623 if (cifsInfo->time == 0)
624 return 1; /* directory was changed, perhaps due to unlink */
630 /* find the corresponding entry in the search */
631 /* Note that the SMB server returns search entries for . and .. which
632 complicates logic here if we choose to parse for them and we do not
633 assume that they are located in the findfirst return buffer.*/
634 /* We start counting in the buffer with entry 2 and increment for every
635 entry (do not increment for . or .. entry) */
636 static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
637 struct file *file, char **ppCurrentEntry, int *num_to_ret)
641 loff_t first_entry_in_buffer;
642 loff_t index_to_find = file->f_pos;
643 struct cifsFileInfo *cifsFile = file->private_data;
644 /* check if index in the buffer */
646 if ((cifsFile == NULL) || (ppCurrentEntry == NULL) ||
647 (num_to_ret == NULL))
650 *ppCurrentEntry = NULL;
651 first_entry_in_buffer =
652 cifsFile->srch_inf.index_of_last_entry -
653 cifsFile->srch_inf.entries_in_buffer;
655 /* if first entry in buf is zero then is first buffer
656 in search response data which means it is likely . and ..
657 will be in this buffer, although some servers do not return
658 . and .. for the root of a drive and for those we need
659 to start two entries earlier */
661 #ifdef CONFIG_CIFS_DEBUG2
662 dump_cifs_file_struct(file, "In fce ");
664 if (((index_to_find < cifsFile->srch_inf.index_of_last_entry) &&
665 is_dir_changed(file)) ||
666 (index_to_find < first_entry_in_buffer)) {
667 /* close and restart search */
668 cFYI(1, ("search backing up - close and restart search"));
669 cifsFile->invalidHandle = TRUE;
670 CIFSFindClose(xid, pTcon, cifsFile->netfid);
671 kfree(cifsFile->search_resume_name);
672 cifsFile->search_resume_name = NULL;
673 if (cifsFile->srch_inf.ntwrk_buf_start) {
674 cFYI(1, ("freeing SMB ff cache buf on search rewind"));
675 if (cifsFile->srch_inf.smallBuf)
676 cifs_small_buf_release(cifsFile->srch_inf.
679 cifs_buf_release(cifsFile->srch_inf.
682 rc = initiate_cifs_search(xid, file);
684 cFYI(1, ("error %d reinitiating a search on rewind",
690 while ((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
691 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)) {
692 cFYI(1, ("calling findnext2"));
693 rc = CIFSFindNext(xid, pTcon, cifsFile->netfid,
694 &cifsFile->srch_inf);
698 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
699 /* we found the buffer that contains the entry */
700 /* scan and find it */
703 char *end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
704 smbCalcSize((struct smb_hdr *)
705 cifsFile->srch_inf.ntwrk_buf_start);
707 current_entry = cifsFile->srch_inf.srch_entries_start;
708 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
709 - cifsFile->srch_inf.entries_in_buffer;
710 pos_in_buf = index_to_find - first_entry_in_buffer;
711 cFYI(1, ("found entry - pos_in_buf %d", pos_in_buf));
713 for (i=0; (i < (pos_in_buf)) && (current_entry != NULL); i++) {
714 /* go entry by entry figuring out which is first */
715 current_entry = nxt_dir_entry(current_entry, end_of_smb,
716 cifsFile->srch_inf.info_level);
718 if ((current_entry == NULL) && (i < pos_in_buf)) {
719 /* BB fixme - check if we should flag this error */
720 cERROR(1, ("reached end of buf searching for pos in buf"
721 " %d index to find %lld rc %d",
722 pos_in_buf, index_to_find, rc));
725 *ppCurrentEntry = current_entry;
727 cFYI(1, ("index not in buffer - could not findnext into it"));
731 if (pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
732 cFYI(1, ("can not return entries pos_in_buf beyond last"));
735 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
740 /* inode num, inode type and filename returned */
741 static int cifs_get_name_from_search_buf(struct qstr *pqst,
742 char *current_entry, __u16 level, unsigned int unicode,
743 struct cifs_sb_info *cifs_sb, int max_len, ino_t *pinum)
746 unsigned int len = 0;
748 struct nls_table *nlt = cifs_sb->local_nls;
752 if (level == SMB_FIND_FILE_UNIX) {
753 FILE_UNIX_INFO *pFindData = (FILE_UNIX_INFO *)current_entry;
755 filename = &pFindData->FileName[0];
757 len = cifs_unicode_bytelen(filename);
759 /* BB should we make this strnlen of PATH_MAX? */
760 len = strnlen(filename, PATH_MAX);
763 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB */
764 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
765 *pinum = pFindData->UniqueId;
766 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
767 FILE_DIRECTORY_INFO *pFindData =
768 (FILE_DIRECTORY_INFO *)current_entry;
769 filename = &pFindData->FileName[0];
770 len = le32_to_cpu(pFindData->FileNameLength);
771 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
772 FILE_FULL_DIRECTORY_INFO *pFindData =
773 (FILE_FULL_DIRECTORY_INFO *)current_entry;
774 filename = &pFindData->FileName[0];
775 len = le32_to_cpu(pFindData->FileNameLength);
776 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
777 SEARCH_ID_FULL_DIR_INFO *pFindData =
778 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
779 filename = &pFindData->FileName[0];
780 len = le32_to_cpu(pFindData->FileNameLength);
781 *pinum = pFindData->UniqueId;
782 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
783 FILE_BOTH_DIRECTORY_INFO *pFindData =
784 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
785 filename = &pFindData->FileName[0];
786 len = le32_to_cpu(pFindData->FileNameLength);
787 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
788 FIND_FILE_STANDARD_INFO * pFindData =
789 (FIND_FILE_STANDARD_INFO *)current_entry;
790 filename = &pFindData->FileName[0];
791 /* one byte length, no name conversion */
792 len = (unsigned int)pFindData->FileNameLength;
794 cFYI(1, ("Unknown findfirst level %d", level));
799 cERROR(1, ("bad search response length %d past smb end", len));
804 /* BB fixme - test with long names */
805 /* Note converted filename can be longer than in unicode */
806 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
807 pqst->len = cifs_convertUCSpath((char *)pqst->name,
808 (__le16 *)filename, len/2, nlt);
810 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
811 (__le16 *)filename, len/2, nlt);
813 pqst->name = filename;
816 pqst->hash = full_name_hash(pqst->name, pqst->len);
817 /* cFYI(1, ("filldir on %s",pqst->name)); */
821 static int cifs_filldir(char *pfindEntry, struct file *file,
822 filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
826 struct cifsFileInfo *pCifsF;
829 struct cifs_sb_info *cifs_sb;
830 struct inode *tmp_inode;
831 struct dentry *tmp_dentry;
833 /* get filename and len into qstring */
835 /* decide whether to create and populate ionde */
836 if ((direntry == NULL) || (file == NULL))
839 pCifsF = file->private_data;
841 if ((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
844 rc = cifs_entry_is_dot(pfindEntry, pCifsF);
845 /* skip . and .. since we added them first */
849 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
851 qstring.name = scratch_buf;
852 rc = cifs_get_name_from_search_buf(&qstring, pfindEntry,
853 pCifsF->srch_inf.info_level,
854 pCifsF->srch_inf.unicode, cifs_sb,
856 &inum /* returned */);
861 rc = construct_dentry(&qstring, file, &tmp_inode, &tmp_dentry);
862 if ((tmp_inode == NULL) || (tmp_dentry == NULL))
866 /* inode created, we need to hash it with right inode number */
868 /* BB fixme - hash the 2 32 quantities bits together if
870 tmp_inode->i_ino = inum;
872 insert_inode_hash(tmp_inode);
875 /* we pass in rc below, indicating whether it is a new inode,
876 so we can figure out whether to invalidate the inode cached
877 data if the file has changed */
878 if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
879 unix_fill_in_inode(tmp_inode,
880 (FILE_UNIX_INFO *)pfindEntry,
882 else if (pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
883 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
884 pfindEntry, &obj_type, rc);
886 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
888 if (rc) /* new inode - needs to be tied to dentry */ {
889 d_instantiate(tmp_dentry, tmp_inode);
891 d_rehash(tmp_dentry);
895 rc = filldir(direntry, qstring.name, qstring.len, file->f_pos,
896 tmp_inode->i_ino, obj_type);
898 cFYI(1, ("filldir rc = %d", rc));
899 /* we can not return filldir errors to the caller
900 since they are "normal" when the stat blocksize
901 is too small - we return remapped error instead */
909 static int cifs_save_resume_key(const char *current_entry,
910 struct cifsFileInfo *cifsFile)
913 unsigned int len = 0;
917 if ((cifsFile == NULL) || (current_entry == NULL))
920 level = cifsFile->srch_inf.info_level;
922 if (level == SMB_FIND_FILE_UNIX) {
923 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
925 filename = &pFindData->FileName[0];
926 if (cifsFile->srch_inf.unicode) {
927 len = cifs_unicode_bytelen(filename);
929 /* BB should we make this strnlen of PATH_MAX? */
930 len = strnlen(filename, PATH_MAX);
932 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
933 } else if (level == SMB_FIND_FILE_DIRECTORY_INFO) {
934 FILE_DIRECTORY_INFO *pFindData =
935 (FILE_DIRECTORY_INFO *)current_entry;
936 filename = &pFindData->FileName[0];
937 len = le32_to_cpu(pFindData->FileNameLength);
938 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
939 } else if (level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
940 FILE_FULL_DIRECTORY_INFO *pFindData =
941 (FILE_FULL_DIRECTORY_INFO *)current_entry;
942 filename = &pFindData->FileName[0];
943 len = le32_to_cpu(pFindData->FileNameLength);
944 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
945 } else if (level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
946 SEARCH_ID_FULL_DIR_INFO *pFindData =
947 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
948 filename = &pFindData->FileName[0];
949 len = le32_to_cpu(pFindData->FileNameLength);
950 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
951 } else if (level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
952 FILE_BOTH_DIRECTORY_INFO *pFindData =
953 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
954 filename = &pFindData->FileName[0];
955 len = le32_to_cpu(pFindData->FileNameLength);
956 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
957 } else if (level == SMB_FIND_FILE_INFO_STANDARD) {
958 FIND_FILE_STANDARD_INFO *pFindData =
959 (FIND_FILE_STANDARD_INFO *)current_entry;
960 filename = &pFindData->FileName[0];
961 /* one byte length, no name conversion */
962 len = (unsigned int)pFindData->FileNameLength;
963 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
965 cFYI(1, ("Unknown findfirst level %d", level));
968 cifsFile->srch_inf.resume_name_len = len;
969 cifsFile->srch_inf.presume_name = filename;
973 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
977 struct cifs_sb_info *cifs_sb;
978 struct cifsTconInfo *pTcon;
979 struct cifsFileInfo *cifsFile = NULL;
982 char *tmp_buf = NULL;
988 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
989 pTcon = cifs_sb->tcon;
993 switch ((int) file->f_pos) {
995 if (filldir(direntry, ".", 1, file->f_pos,
996 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
997 cERROR(1, ("Filldir for current dir failed"));
1003 if (filldir(direntry, "..", 2, file->f_pos,
1004 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
1005 cERROR(1, ("Filldir for parent dir failed"));
1011 /* 1) If search is active,
1012 is in current search buffer?
1013 if it before then restart search
1014 if after then keep searching till find it */
1016 if (file->private_data == NULL) {
1017 rc = initiate_cifs_search(xid, file);
1018 cFYI(1, ("initiate cifs search rc %d", rc));
1024 if (file->private_data == NULL) {
1029 cifsFile = file->private_data;
1030 if (cifsFile->srch_inf.endOfSearch) {
1031 if (cifsFile->srch_inf.emptyDir) {
1032 cFYI(1, ("End of search, empty dir"));
1037 cifsFile->invalidHandle = TRUE;
1038 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1040 kfree(cifsFile->search_resume_name);
1041 cifsFile->search_resume_name = NULL; */
1043 rc = find_cifs_entry(xid, pTcon, file,
1044 ¤t_entry, &num_to_fill);
1046 cFYI(1, ("fce error %d", rc));
1048 } else if (current_entry != NULL) {
1049 cFYI(1, ("entry %lld found", file->f_pos));
1051 cFYI(1, ("could not find entry"));
1054 cFYI(1, ("loop through %d times filling dir for net buf %p",
1055 num_to_fill, cifsFile->srch_inf.ntwrk_buf_start));
1056 max_len = smbCalcSize((struct smb_hdr *)
1057 cifsFile->srch_inf.ntwrk_buf_start);
1058 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1060 /* To be safe - for UCS to UTF-8 with strings loaded
1061 with the rare long characters alloc more to account for
1062 such multibyte target UTF-8 characters. cifs_unicode.c,
1063 which actually does the conversion, has the same limit */
1064 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
1065 for (i = 0; (i < num_to_fill) && (rc == 0); i++) {
1066 if (current_entry == NULL) {
1067 /* evaluate whether this case is an error */
1068 cERROR(1,("past end of SMB num to fill %d i %d",
1072 /* if buggy server returns . and .. late do
1073 we want to check for that here? */
1074 rc = cifs_filldir(current_entry, file,
1075 filldir, direntry, tmp_buf, max_len);
1076 if (rc == -EOVERFLOW) {
1083 cifsFile->srch_inf.index_of_last_entry) {
1084 cFYI(1, ("last entry in buf at pos %lld %s",
1085 file->f_pos, tmp_buf));
1086 cifs_save_resume_key(current_entry, cifsFile);
1090 nxt_dir_entry(current_entry, end_of_smb,
1091 cifsFile->srch_inf.info_level);