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>
26 #include <linux/smp_lock.h>
29 #include "cifsproto.h"
30 #include "cifs_unicode.h"
31 #include "cifs_debug.h"
32 #include "cifs_fs_sb.h"
35 #ifdef CONFIG_CIFS_DEBUG2
36 static void dump_cifs_file_struct(struct file *file, char *label)
38 struct cifsFileInfo * cf;
41 cf = file->private_data;
43 cFYI(1,("empty cifs private file data"));
46 if (cf->invalidHandle) {
47 cFYI(1,("invalid handle"));
49 if (cf->srch_inf.endOfSearch) {
50 cFYI(1,("end of search"));
52 if (cf->srch_inf.emptyDir) {
53 cFYI(1,("empty dir"));
60 /* Returns one if new inode created (which therefore needs to be hashed) */
61 /* Might check in the future if inode number changed so we can rehash inode */
62 static int construct_dentry(struct qstr *qstring, struct file *file,
63 struct inode **ptmp_inode, struct dentry **pnew_dentry)
65 struct dentry *tmp_dentry;
66 struct cifs_sb_info *cifs_sb;
67 struct cifsTconInfo *pTcon;
70 cFYI(1, ("For %s", qstring->name));
71 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
72 pTcon = cifs_sb->tcon;
74 qstring->hash = full_name_hash(qstring->name, qstring->len);
75 tmp_dentry = d_lookup(file->f_path.dentry, qstring);
77 cFYI(0, ("existing dentry with inode 0x%p", tmp_dentry->d_inode));
78 *ptmp_inode = tmp_dentry->d_inode;
79 /* BB overwrite old name? i.e. tmp_dentry->d_name and tmp_dentry->d_name.len??*/
80 if (*ptmp_inode == NULL) {
81 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
82 if (*ptmp_inode == NULL)
86 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
87 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
89 tmp_dentry = d_alloc(file->f_path.dentry, qstring);
90 if (tmp_dentry == NULL) {
91 cERROR(1,("Failed allocating dentry"));
96 *ptmp_inode = new_inode(file->f_path.dentry->d_sb);
98 tmp_dentry->d_op = &cifs_ci_dentry_ops;
100 tmp_dentry->d_op = &cifs_dentry_ops;
101 if (*ptmp_inode == NULL)
103 if (file->f_path.dentry->d_sb->s_flags & MS_NOATIME)
104 (*ptmp_inode)->i_flags |= S_NOATIME | S_NOCMTIME;
108 tmp_dentry->d_time = jiffies;
109 *pnew_dentry = tmp_dentry;
113 static void AdjustForTZ(struct cifsTconInfo * tcon, struct inode * inode)
115 if ((tcon) && (tcon->ses) && (tcon->ses->server)) {
116 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;
124 static void fill_in_inode(struct inode *tmp_inode, int new_buf_type,
125 char * buf, int *pobject_type, int isNewInode)
128 struct timespec local_mtime;
130 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
131 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
133 __u64 allocation_size;
136 /* save mtime and size */
137 local_mtime = tmp_inode->i_mtime;
138 local_size = tmp_inode->i_size;
141 FILE_DIRECTORY_INFO *pfindData = (FILE_DIRECTORY_INFO *)buf;
143 attr = le32_to_cpu(pfindData->ExtFileAttributes);
144 allocation_size = le64_to_cpu(pfindData->AllocationSize);
145 end_of_file = le64_to_cpu(pfindData->EndOfFile);
147 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
149 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastWriteTime));
151 cifs_NTtimeToUnix(le64_to_cpu(pfindData->ChangeTime));
152 } else { /* legacy, OS2 and DOS style */
153 /* struct timespec ts;*/
154 FIND_FILE_STANDARD_INFO * pfindData =
155 (FIND_FILE_STANDARD_INFO *)buf;
157 tmp_inode->i_mtime = cnvrtDosUnixTm(
158 le16_to_cpu(pfindData->LastWriteDate),
159 le16_to_cpu(pfindData->LastWriteTime));
160 tmp_inode->i_atime = cnvrtDosUnixTm(
161 le16_to_cpu(pfindData->LastAccessDate),
162 le16_to_cpu(pfindData->LastAccessTime));
163 tmp_inode->i_ctime = cnvrtDosUnixTm(
164 le16_to_cpu(pfindData->LastWriteDate),
165 le16_to_cpu(pfindData->LastWriteTime));
166 AdjustForTZ(cifs_sb->tcon, tmp_inode);
167 attr = le16_to_cpu(pfindData->Attributes);
168 allocation_size = le32_to_cpu(pfindData->AllocationSize);
169 end_of_file = le32_to_cpu(pfindData->DataSize);
172 /* Linux can not store file creation time unfortunately so ignore it */
174 cifsInfo->cifsAttrs = attr;
175 cifsInfo->time = jiffies;
177 /* treat dos attribute of read-only as read-only mode bit e.g. 555? */
178 /* 2767 perms - indicate mandatory locking */
179 /* BB fill in uid and gid here? with help from winbind?
180 or retrieve from NTFS stream extended attribute */
181 if (atomic_read(&cifsInfo->inUse) == 0) {
182 tmp_inode->i_uid = cifs_sb->mnt_uid;
183 tmp_inode->i_gid = cifs_sb->mnt_gid;
184 /* set default mode. will override for dirs below */
185 tmp_inode->i_mode = cifs_sb->mnt_file_mode;
187 /* mask off the type bits since it gets set
188 below and we do not want to get two type
190 tmp_inode->i_mode &= ~S_IFMT;
193 if (attr & ATTR_DIRECTORY) {
194 *pobject_type = DT_DIR;
195 /* override default perms since we do not lock dirs */
196 if (atomic_read(&cifsInfo->inUse) == 0) {
197 tmp_inode->i_mode = cifs_sb->mnt_dir_mode;
199 tmp_inode->i_mode |= S_IFDIR;
200 } else if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) &&
201 (attr & ATTR_SYSTEM)) {
202 if (end_of_file == 0) {
203 *pobject_type = DT_FIFO;
204 tmp_inode->i_mode |= S_IFIFO;
206 /* rather than get the type here, we mark the
207 inode as needing revalidate and get the real type
208 (blk vs chr vs. symlink) later ie in lookup */
209 *pobject_type = DT_REG;
210 tmp_inode->i_mode |= S_IFREG;
213 /* we no longer mark these because we could not follow them */
214 /* } else if (attr & ATTR_REPARSE) {
215 *pobject_type = DT_LNK;
216 tmp_inode->i_mode |= S_IFLNK; */
218 *pobject_type = DT_REG;
219 tmp_inode->i_mode |= S_IFREG;
220 if (attr & ATTR_READONLY)
221 tmp_inode->i_mode &= ~(S_IWUGO);
222 else if ((tmp_inode->i_mode & S_IWUGO) == 0)
223 /* the ATTR_READONLY flag may have been changed on */
224 /* server -- set any w bits allowed by mnt_file_mode */
225 tmp_inode->i_mode |= (S_IWUGO & cifs_sb->mnt_file_mode);
226 } /* could add code here - to validate if device or weird share type? */
228 /* can not fill in nlink here as in qpathinfo version and Unx search */
229 if (atomic_read(&cifsInfo->inUse) == 0) {
230 atomic_set(&cifsInfo->inUse, 1);
233 spin_lock(&tmp_inode->i_lock);
234 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
235 /* can not safely change the file size here if the
236 client is writing to it due to potential races */
237 i_size_write(tmp_inode, end_of_file);
239 /* 512 bytes (2**9) is the fake blocksize that must be used */
240 /* for this calculation, even though the reported blocksize is larger */
241 tmp_inode->i_blocks = (512 - 1 + allocation_size) >> 9;
243 spin_unlock(&tmp_inode->i_lock);
245 if (allocation_size < end_of_file)
246 cFYI(1, ("May be sparse file, allocation less than file size"));
247 cFYI(1, ("File Size %ld and blocks %llu",
248 (unsigned long)tmp_inode->i_size,
249 (unsigned long long)tmp_inode->i_blocks));
250 if (S_ISREG(tmp_inode->i_mode)) {
251 cFYI(1, ("File inode"));
252 tmp_inode->i_op = &cifs_file_inode_ops;
253 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
254 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
255 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
257 tmp_inode->i_fop = &cifs_file_direct_ops;
259 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
260 tmp_inode->i_fop = &cifs_file_nobrl_ops;
262 tmp_inode->i_fop = &cifs_file_ops;
264 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
265 (cifs_sb->tcon->ses->server->maxBuf <
266 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
267 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
269 tmp_inode->i_data.a_ops = &cifs_addr_ops;
272 return; /* No sense invalidating pages for new inode
273 since have not started caching readahead file
276 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
277 (local_size == tmp_inode->i_size)) {
278 cFYI(1, ("inode exists but unchanged"));
280 /* file may have changed on server */
281 cFYI(1, ("invalidate inode, readdir detected change"));
282 invalidate_remote_inode(tmp_inode);
284 } else if (S_ISDIR(tmp_inode->i_mode)) {
285 cFYI(1, ("Directory inode"));
286 tmp_inode->i_op = &cifs_dir_inode_ops;
287 tmp_inode->i_fop = &cifs_dir_ops;
288 } else if (S_ISLNK(tmp_inode->i_mode)) {
289 cFYI(1, ("Symbolic Link inode"));
290 tmp_inode->i_op = &cifs_symlink_inode_ops;
292 cFYI(1, ("Init special inode"));
293 init_special_inode(tmp_inode, tmp_inode->i_mode,
298 static void unix_fill_in_inode(struct inode *tmp_inode,
299 FILE_UNIX_INFO *pfindData, int *pobject_type, int isNewInode)
302 struct timespec local_mtime;
304 struct cifsInodeInfo *cifsInfo = CIFS_I(tmp_inode);
305 struct cifs_sb_info *cifs_sb = CIFS_SB(tmp_inode->i_sb);
307 __u32 type = le32_to_cpu(pfindData->Type);
308 __u64 num_of_bytes = le64_to_cpu(pfindData->NumOfBytes);
309 __u64 end_of_file = le64_to_cpu(pfindData->EndOfFile);
310 cifsInfo->time = jiffies;
311 atomic_inc(&cifsInfo->inUse);
313 /* save mtime and size */
314 local_mtime = tmp_inode->i_mtime;
315 local_size = tmp_inode->i_size;
318 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastAccessTime));
320 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastModificationTime));
322 cifs_NTtimeToUnix(le64_to_cpu(pfindData->LastStatusChange));
324 tmp_inode->i_mode = le64_to_cpu(pfindData->Permissions);
325 /* since we set the inode type below we need to mask off type
326 to avoid strange results if bits above were corrupt */
327 tmp_inode->i_mode &= ~S_IFMT;
328 if (type == UNIX_FILE) {
329 *pobject_type = DT_REG;
330 tmp_inode->i_mode |= S_IFREG;
331 } else if (type == UNIX_SYMLINK) {
332 *pobject_type = DT_LNK;
333 tmp_inode->i_mode |= S_IFLNK;
334 } else if (type == UNIX_DIR) {
335 *pobject_type = DT_DIR;
336 tmp_inode->i_mode |= S_IFDIR;
337 } else if (type == UNIX_CHARDEV) {
338 *pobject_type = DT_CHR;
339 tmp_inode->i_mode |= S_IFCHR;
340 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
341 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
342 } else if (type == UNIX_BLOCKDEV) {
343 *pobject_type = DT_BLK;
344 tmp_inode->i_mode |= S_IFBLK;
345 tmp_inode->i_rdev = MKDEV(le64_to_cpu(pfindData->DevMajor),
346 le64_to_cpu(pfindData->DevMinor) & MINORMASK);
347 } else if (type == UNIX_FIFO) {
348 *pobject_type = DT_FIFO;
349 tmp_inode->i_mode |= S_IFIFO;
350 } else if (type == UNIX_SOCKET) {
351 *pobject_type = DT_SOCK;
352 tmp_inode->i_mode |= S_IFSOCK;
354 /* safest to just call it a file */
355 *pobject_type = DT_REG;
356 tmp_inode->i_mode |= S_IFREG;
357 cFYI(1,("unknown inode type %d",type));
360 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID)
361 tmp_inode->i_uid = cifs_sb->mnt_uid;
363 tmp_inode->i_uid = le64_to_cpu(pfindData->Uid);
364 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID)
365 tmp_inode->i_gid = cifs_sb->mnt_gid;
367 tmp_inode->i_gid = le64_to_cpu(pfindData->Gid);
368 tmp_inode->i_nlink = le64_to_cpu(pfindData->Nlinks);
370 spin_lock(&tmp_inode->i_lock);
371 if (is_size_safe_to_change(cifsInfo, end_of_file)) {
372 /* can not safely change the file size here if the
373 client is writing to it due to potential races */
374 i_size_write(tmp_inode, end_of_file);
376 /* 512 bytes (2**9) is the fake blocksize that must be used */
377 /* for this calculation, not the real blocksize */
378 tmp_inode->i_blocks = (512 - 1 + num_of_bytes) >> 9;
380 spin_unlock(&tmp_inode->i_lock);
382 if (S_ISREG(tmp_inode->i_mode)) {
383 cFYI(1, ("File inode"));
384 tmp_inode->i_op = &cifs_file_inode_ops;
386 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) {
387 if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
388 tmp_inode->i_fop = &cifs_file_direct_nobrl_ops;
390 tmp_inode->i_fop = &cifs_file_direct_ops;
391 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL)
392 tmp_inode->i_fop = &cifs_file_nobrl_ops;
394 tmp_inode->i_fop = &cifs_file_ops;
396 if ((cifs_sb->tcon) && (cifs_sb->tcon->ses) &&
397 (cifs_sb->tcon->ses->server->maxBuf <
398 PAGE_CACHE_SIZE + MAX_CIFS_HDR_SIZE))
399 tmp_inode->i_data.a_ops = &cifs_addr_ops_smallbuf;
401 tmp_inode->i_data.a_ops = &cifs_addr_ops;
404 return; /* No sense invalidating pages for new inode since we
405 have not started caching readahead file data yet */
407 if (timespec_equal(&tmp_inode->i_mtime, &local_mtime) &&
408 (local_size == tmp_inode->i_size)) {
409 cFYI(1, ("inode exists but unchanged"));
411 /* file may have changed on server */
412 cFYI(1, ("invalidate inode, readdir detected change"));
413 invalidate_remote_inode(tmp_inode);
415 } else if (S_ISDIR(tmp_inode->i_mode)) {
416 cFYI(1, ("Directory inode"));
417 tmp_inode->i_op = &cifs_dir_inode_ops;
418 tmp_inode->i_fop = &cifs_dir_ops;
419 } else if (S_ISLNK(tmp_inode->i_mode)) {
420 cFYI(1, ("Symbolic Link inode"));
421 tmp_inode->i_op = &cifs_symlink_inode_ops;
422 /* tmp_inode->i_fop = *//* do not need to set to anything */
424 cFYI(1, ("Special inode"));
425 init_special_inode(tmp_inode, tmp_inode->i_mode,
430 static int initiate_cifs_search(const int xid, struct file *file)
434 struct cifsFileInfo * cifsFile;
435 struct cifs_sb_info *cifs_sb;
436 struct cifsTconInfo *pTcon;
438 if (file->private_data == NULL) {
440 kzalloc(sizeof(struct cifsFileInfo),GFP_KERNEL);
443 if (file->private_data == NULL)
445 cifsFile = file->private_data;
446 cifsFile->invalidHandle = TRUE;
447 cifsFile->srch_inf.endOfSearch = FALSE;
449 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
453 pTcon = cifs_sb->tcon;
457 full_path = build_path_from_dentry(file->f_path.dentry);
459 if (full_path == NULL) {
463 cFYI(1, ("Full path: %s start at: %lld", full_path, file->f_pos));
466 /* test for Unix extensions */
467 if (pTcon->ses->capabilities & CAP_UNIX) {
468 cifsFile->srch_inf.info_level = SMB_FIND_FILE_UNIX;
469 } else if ((pTcon->ses->capabilities &
470 (CAP_NT_SMBS | CAP_NT_FIND)) == 0) {
471 cifsFile->srch_inf.info_level = SMB_FIND_FILE_INFO_STANDARD;
472 } else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) {
473 cifsFile->srch_inf.info_level = SMB_FIND_FILE_ID_FULL_DIR_INFO;
474 } else /* not srvinos - BB fixme add check for backlevel? */ {
475 cifsFile->srch_inf.info_level = SMB_FIND_FILE_DIRECTORY_INFO;
478 rc = CIFSFindFirst(xid, pTcon,full_path,cifs_sb->local_nls,
479 &cifsFile->netfid, &cifsFile->srch_inf,
480 cifs_sb->mnt_cifs_flags &
481 CIFS_MOUNT_MAP_SPECIAL_CHR, CIFS_DIR_SEP(cifs_sb));
483 cifsFile->invalidHandle = FALSE;
484 if ((rc == -EOPNOTSUPP) &&
485 (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)) {
486 cifs_sb->mnt_cifs_flags &= ~CIFS_MOUNT_SERVER_INUM;
493 /* return length of unicode string in bytes */
494 static int cifs_unicode_bytelen(char *str)
497 __le16 * ustr = (__le16 *)str;
499 for(len=0;len <= PATH_MAX;len++) {
503 cFYI(1,("Unicode string longer than PATH_MAX found"));
507 static char *nxt_dir_entry(char *old_entry, char *end_of_smb, int level)
510 FILE_DIRECTORY_INFO * pDirInfo = (FILE_DIRECTORY_INFO *)old_entry;
512 if (level == SMB_FIND_FILE_INFO_STANDARD) {
513 FIND_FILE_STANDARD_INFO * pfData;
514 pfData = (FIND_FILE_STANDARD_INFO *)pDirInfo;
516 new_entry = old_entry + sizeof(FIND_FILE_STANDARD_INFO) +
517 pfData->FileNameLength;
519 new_entry = old_entry + le32_to_cpu(pDirInfo->NextEntryOffset);
520 cFYI(1,("new entry %p old entry %p",new_entry,old_entry));
521 /* validate that new_entry is not past end of SMB */
522 if (new_entry >= end_of_smb) {
524 ("search entry %p began after end of SMB %p old entry %p",
525 new_entry, end_of_smb, old_entry));
527 } else if (((level == SMB_FIND_FILE_INFO_STANDARD) &&
528 (new_entry + sizeof(FIND_FILE_STANDARD_INFO) > end_of_smb)) ||
529 ((level != SMB_FIND_FILE_INFO_STANDARD) &&
530 (new_entry + sizeof(FILE_DIRECTORY_INFO) > end_of_smb))) {
531 cERROR(1,("search entry %p extends after end of SMB %p",
532 new_entry, end_of_smb));
539 #define UNICODE_DOT cpu_to_le16(0x2e)
541 /* return 0 if no match and 1 for . (current directory) and 2 for .. (parent) */
542 static int cifs_entry_is_dot(char *current_entry, struct cifsFileInfo *cfile)
545 char * filename = NULL;
548 if (cfile->srch_inf.info_level == SMB_FIND_FILE_UNIX) {
549 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
550 filename = &pFindData->FileName[0];
551 if (cfile->srch_inf.unicode) {
552 len = cifs_unicode_bytelen(filename);
554 /* BB should we make this strnlen of PATH_MAX? */
555 len = strnlen(filename, 5);
557 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_DIRECTORY_INFO) {
558 FILE_DIRECTORY_INFO * pFindData =
559 (FILE_DIRECTORY_INFO *)current_entry;
560 filename = &pFindData->FileName[0];
561 len = le32_to_cpu(pFindData->FileNameLength);
562 } else if (cfile->srch_inf.info_level ==
563 SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
564 FILE_FULL_DIRECTORY_INFO * pFindData =
565 (FILE_FULL_DIRECTORY_INFO *)current_entry;
566 filename = &pFindData->FileName[0];
567 len = le32_to_cpu(pFindData->FileNameLength);
568 } else if (cfile->srch_inf.info_level ==
569 SMB_FIND_FILE_ID_FULL_DIR_INFO) {
570 SEARCH_ID_FULL_DIR_INFO * pFindData =
571 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
572 filename = &pFindData->FileName[0];
573 len = le32_to_cpu(pFindData->FileNameLength);
574 } else if (cfile->srch_inf.info_level ==
575 SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
576 FILE_BOTH_DIRECTORY_INFO * pFindData =
577 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
578 filename = &pFindData->FileName[0];
579 len = le32_to_cpu(pFindData->FileNameLength);
580 } else if (cfile->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD) {
581 FIND_FILE_STANDARD_INFO * pFindData =
582 (FIND_FILE_STANDARD_INFO *)current_entry;
583 filename = &pFindData->FileName[0];
584 len = pFindData->FileNameLength;
586 cFYI(1,("Unknown findfirst level %d",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",rc));
689 while((index_to_find >= cifsFile->srch_inf.index_of_last_entry) &&
690 (rc == 0) && (cifsFile->srch_inf.endOfSearch == FALSE)){
691 cFYI(1,("calling findnext2"));
692 rc = CIFSFindNext(xid,pTcon,cifsFile->netfid,
693 &cifsFile->srch_inf);
697 if (index_to_find < cifsFile->srch_inf.index_of_last_entry) {
698 /* we found the buffer that contains the entry */
699 /* scan and find it */
701 char * current_entry;
702 char * end_of_smb = cifsFile->srch_inf.ntwrk_buf_start +
703 smbCalcSize((struct smb_hdr *)
704 cifsFile->srch_inf.ntwrk_buf_start);
706 current_entry = cifsFile->srch_inf.srch_entries_start;
707 first_entry_in_buffer = cifsFile->srch_inf.index_of_last_entry
708 - cifsFile->srch_inf.entries_in_buffer;
709 pos_in_buf = index_to_find - first_entry_in_buffer;
710 cFYI(1,("found entry - pos_in_buf %d",pos_in_buf));
712 for(i=0;(i<(pos_in_buf)) && (current_entry != NULL);i++) {
713 /* go entry by entry figuring out which is first */
714 current_entry = nxt_dir_entry(current_entry,end_of_smb,
715 cifsFile->srch_inf.info_level);
717 if((current_entry == NULL) && (i < pos_in_buf)) {
718 /* BB fixme - check if we should flag this error */
719 cERROR(1,("reached end of buf searching for pos in buf"
720 " %d index to find %lld rc %d",
721 pos_in_buf,index_to_find,rc));
724 *ppCurrentEntry = current_entry;
726 cFYI(1,("index not in buffer - could not findnext into it"));
730 if(pos_in_buf >= cifsFile->srch_inf.entries_in_buffer) {
731 cFYI(1,("can not return entries pos_in_buf beyond last entry"));
734 *num_to_ret = cifsFile->srch_inf.entries_in_buffer - pos_in_buf;
739 /* inode num, inode type and filename returned */
740 static int cifs_get_name_from_search_buf(struct qstr *pqst,
741 char *current_entry, __u16 level, unsigned int unicode,
742 struct cifs_sb_info * cifs_sb, int max_len, ino_t *pinum)
745 unsigned int len = 0;
747 struct nls_table * nlt = cifs_sb->local_nls;
751 if(level == SMB_FIND_FILE_UNIX) {
752 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
754 filename = &pFindData->FileName[0];
756 len = cifs_unicode_bytelen(filename);
758 /* BB should we make this strnlen of PATH_MAX? */
759 len = strnlen(filename, PATH_MAX);
762 /* BB fixme - hash low and high 32 bits if not 64 bit arch BB fixme */
763 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM)
764 *pinum = pFindData->UniqueId;
765 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
766 FILE_DIRECTORY_INFO * pFindData =
767 (FILE_DIRECTORY_INFO *)current_entry;
768 filename = &pFindData->FileName[0];
769 len = le32_to_cpu(pFindData->FileNameLength);
770 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
771 FILE_FULL_DIRECTORY_INFO * pFindData =
772 (FILE_FULL_DIRECTORY_INFO *)current_entry;
773 filename = &pFindData->FileName[0];
774 len = le32_to_cpu(pFindData->FileNameLength);
775 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
776 SEARCH_ID_FULL_DIR_INFO * pFindData =
777 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
778 filename = &pFindData->FileName[0];
779 len = le32_to_cpu(pFindData->FileNameLength);
780 *pinum = pFindData->UniqueId;
781 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
782 FILE_BOTH_DIRECTORY_INFO * pFindData =
783 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
784 filename = &pFindData->FileName[0];
785 len = le32_to_cpu(pFindData->FileNameLength);
786 } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
787 FIND_FILE_STANDARD_INFO * pFindData =
788 (FIND_FILE_STANDARD_INFO *)current_entry;
789 filename = &pFindData->FileName[0];
790 /* one byte length, no name conversion */
791 len = (unsigned int)pFindData->FileNameLength;
793 cFYI(1,("Unknown findfirst level %d",level));
798 cERROR(1,("bad search response length %d past smb end", len));
803 /* BB fixme - test with long names */
804 /* Note converted filename can be longer than in unicode */
805 if(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR)
806 pqst->len = cifs_convertUCSpath((char *)pqst->name,
807 (__le16 *)filename, len/2, nlt);
809 pqst->len = cifs_strfromUCS_le((char *)pqst->name,
810 (__le16 *)filename,len/2,nlt);
812 pqst->name = filename;
815 pqst->hash = full_name_hash(pqst->name,pqst->len);
816 /* cFYI(1,("filldir on %s",pqst->name)); */
820 static int cifs_filldir(char *pfindEntry, struct file *file,
821 filldir_t filldir, void *direntry, char *scratch_buf, int max_len)
825 struct cifsFileInfo * pCifsF;
828 struct cifs_sb_info * cifs_sb;
829 struct inode *tmp_inode;
830 struct dentry *tmp_dentry;
832 /* get filename and len into qstring */
834 /* decide whether to create and populate ionde */
835 if((direntry == NULL) || (file == NULL))
838 pCifsF = file->private_data;
840 if((scratch_buf == NULL) || (pfindEntry == NULL) || (pCifsF == NULL))
843 rc = cifs_entry_is_dot(pfindEntry,pCifsF);
844 /* skip . and .. since we added them first */
848 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
850 qstring.name = scratch_buf;
851 rc = cifs_get_name_from_search_buf(&qstring,pfindEntry,
852 pCifsF->srch_inf.info_level,
853 pCifsF->srch_inf.unicode,cifs_sb,
855 &inum /* returned */);
860 rc = construct_dentry(&qstring,file,&tmp_inode, &tmp_dentry);
861 if((tmp_inode == NULL) || (tmp_dentry == NULL))
865 /* inode created, we need to hash it with right inode number */
867 /* BB fixme - hash the 2 32 quantities bits together if necessary BB */
868 tmp_inode->i_ino = inum;
870 insert_inode_hash(tmp_inode);
873 /* we pass in rc below, indicating whether it is a new inode,
874 so we can figure out whether to invalidate the inode cached
875 data if the file has changed */
876 if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_UNIX)
877 unix_fill_in_inode(tmp_inode,
878 (FILE_UNIX_INFO *)pfindEntry,
880 else if(pCifsF->srch_inf.info_level == SMB_FIND_FILE_INFO_STANDARD)
881 fill_in_inode(tmp_inode, 0 /* old level 1 buffer type */,
882 pfindEntry, &obj_type, rc);
884 fill_in_inode(tmp_inode, 1 /* NT */, pfindEntry, &obj_type, rc);
886 if(rc) /* new inode - needs to be tied to dentry */ {
887 d_instantiate(tmp_dentry, tmp_inode);
889 d_rehash(tmp_dentry);
893 rc = filldir(direntry,qstring.name,qstring.len,file->f_pos,
894 tmp_inode->i_ino,obj_type);
896 cFYI(1,("filldir rc = %d",rc));
897 /* we can not return filldir errors to the caller
898 since they are "normal" when the stat blocksize
899 is too small - we return remapped error instead */
907 static int cifs_save_resume_key(const char *current_entry,
908 struct cifsFileInfo *cifsFile)
911 unsigned int len = 0;
915 if((cifsFile == NULL) || (current_entry == NULL))
918 level = cifsFile->srch_inf.info_level;
920 if(level == SMB_FIND_FILE_UNIX) {
921 FILE_UNIX_INFO * pFindData = (FILE_UNIX_INFO *)current_entry;
923 filename = &pFindData->FileName[0];
924 if(cifsFile->srch_inf.unicode) {
925 len = cifs_unicode_bytelen(filename);
927 /* BB should we make this strnlen of PATH_MAX? */
928 len = strnlen(filename, PATH_MAX);
930 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
931 } else if(level == SMB_FIND_FILE_DIRECTORY_INFO) {
932 FILE_DIRECTORY_INFO * pFindData =
933 (FILE_DIRECTORY_INFO *)current_entry;
934 filename = &pFindData->FileName[0];
935 len = le32_to_cpu(pFindData->FileNameLength);
936 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
937 } else if(level == SMB_FIND_FILE_FULL_DIRECTORY_INFO) {
938 FILE_FULL_DIRECTORY_INFO * pFindData =
939 (FILE_FULL_DIRECTORY_INFO *)current_entry;
940 filename = &pFindData->FileName[0];
941 len = le32_to_cpu(pFindData->FileNameLength);
942 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
943 } else if(level == SMB_FIND_FILE_ID_FULL_DIR_INFO) {
944 SEARCH_ID_FULL_DIR_INFO * pFindData =
945 (SEARCH_ID_FULL_DIR_INFO *)current_entry;
946 filename = &pFindData->FileName[0];
947 len = le32_to_cpu(pFindData->FileNameLength);
948 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
949 } else if(level == SMB_FIND_FILE_BOTH_DIRECTORY_INFO) {
950 FILE_BOTH_DIRECTORY_INFO * pFindData =
951 (FILE_BOTH_DIRECTORY_INFO *)current_entry;
952 filename = &pFindData->FileName[0];
953 len = le32_to_cpu(pFindData->FileNameLength);
954 cifsFile->srch_inf.resume_key = pFindData->FileIndex;
955 } else if(level == SMB_FIND_FILE_INFO_STANDARD) {
956 FIND_FILE_STANDARD_INFO * pFindData =
957 (FIND_FILE_STANDARD_INFO *)current_entry;
958 filename = &pFindData->FileName[0];
959 /* one byte length, no name conversion */
960 len = (unsigned int)pFindData->FileNameLength;
961 cifsFile->srch_inf.resume_key = pFindData->ResumeKey;
963 cFYI(1,("Unknown findfirst level %d",level));
966 cifsFile->srch_inf.resume_name_len = len;
967 cifsFile->srch_inf.presume_name = filename;
971 int cifs_readdir(struct file *file, void *direntry, filldir_t filldir)
975 struct cifs_sb_info *cifs_sb;
976 struct cifsTconInfo *pTcon;
977 struct cifsFileInfo *cifsFile = NULL;
978 char * current_entry;
980 char * tmp_buf = NULL;
986 cifs_sb = CIFS_SB(file->f_path.dentry->d_sb);
987 pTcon = cifs_sb->tcon;
991 switch ((int) file->f_pos) {
993 if (filldir(direntry, ".", 1, file->f_pos,
994 file->f_path.dentry->d_inode->i_ino, DT_DIR) < 0) {
995 cERROR(1, ("Filldir for current dir failed"));
1001 if (filldir(direntry, "..", 2, file->f_pos,
1002 file->f_path.dentry->d_parent->d_inode->i_ino, DT_DIR) < 0) {
1003 cERROR(1, ("Filldir for parent dir failed"));
1009 /* 1) If search is active,
1010 is in current search buffer?
1011 if it before then restart search
1012 if after then keep searching till find it */
1014 if(file->private_data == NULL) {
1015 rc = initiate_cifs_search(xid,file);
1016 cFYI(1,("initiate cifs search rc %d",rc));
1022 if(file->private_data == NULL) {
1027 cifsFile = file->private_data;
1028 if (cifsFile->srch_inf.endOfSearch) {
1029 if(cifsFile->srch_inf.emptyDir) {
1030 cFYI(1, ("End of search, empty dir"));
1035 cifsFile->invalidHandle = TRUE;
1036 CIFSFindClose(xid, pTcon, cifsFile->netfid);
1038 kfree(cifsFile->search_resume_name);
1039 cifsFile->search_resume_name = NULL; */
1041 rc = find_cifs_entry(xid,pTcon, file,
1042 ¤t_entry,&num_to_fill);
1044 cFYI(1,("fce error %d",rc));
1046 } else if (current_entry != NULL) {
1047 cFYI(1,("entry %lld found",file->f_pos));
1049 cFYI(1,("could not find entry"));
1052 cFYI(1,("loop through %d times filling dir for net buf %p",
1053 num_to_fill,cifsFile->srch_inf.ntwrk_buf_start));
1054 max_len = smbCalcSize((struct smb_hdr *)
1055 cifsFile->srch_inf.ntwrk_buf_start);
1056 end_of_smb = cifsFile->srch_inf.ntwrk_buf_start + max_len;
1058 /* To be safe - for UCS to UTF-8 with strings loaded
1059 with the rare long characters alloc more to account for
1060 such multibyte target UTF-8 characters. cifs_unicode.c,
1061 which actually does the conversion, has the same limit */
1062 tmp_buf = kmalloc((2 * NAME_MAX) + 4, GFP_KERNEL);
1063 for(i=0;(i<num_to_fill) && (rc == 0);i++) {
1064 if(current_entry == NULL) {
1065 /* evaluate whether this case is an error */
1066 cERROR(1,("past end of SMB num to fill %d i %d",
1070 /* if buggy server returns . and .. late do
1071 we want to check for that here? */
1072 rc = cifs_filldir(current_entry, file,
1073 filldir, direntry, tmp_buf, max_len);
1074 if(rc == -EOVERFLOW) {
1081 cifsFile->srch_inf.index_of_last_entry) {
1082 cFYI(1,("last entry in buf at pos %lld %s",
1083 file->f_pos,tmp_buf));
1084 cifs_save_resume_key(current_entry,cifsFile);
1088 nxt_dir_entry(current_entry, end_of_smb,
1089 cifsFile->srch_inf.info_level);