2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2011 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include "yaffs_guts.h"
18 #include "yaffs_trace.h"
22 #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
25 #define NULL ((void *)0)
28 #define ROOT_DIR(dev) (((dev) && (dev)->is_mounted) ? (dev)->root_dir : NULL)
30 /* YAFFSFS_RW_SIZE must be a power of 2 */
31 #define YAFFSFS_RW_SHIFT (13)
32 #define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT)
34 /* Some forward references */
35 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
37 int symDepth, int getEquiv,
38 struct yaffs_obj **dirOut,
39 int *notDir, int *loop);
41 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
42 static yaffs_DIR *yaffsfs_opendir_reldir_no_lock(
43 struct yaffs_obj *reldir, const YCHAR *dirname);
44 static int yaffsfs_closedir_no_lock(yaffs_DIR *dirent);
46 int yaffs_wr_attempts;
50 * There are open inodes in struct yaffsfs_Inode.
51 * There are open file descriptors in yaffsfs_FileDes.
52 * There are open handles in yaffsfs_FileDes.
54 * Things are structured this way to be like the Linux VFS model
55 * so that interactions with the yaffs guts calls are similar.
56 * That means more common code paths and less special code.
57 * That means better testing etc.
59 * We have 3 layers because:
60 * A handle is different than an fd because you can use dup()
61 * to create a new handle that accesses the *same* fd. The two
62 * handles will use the same offset (part of the fd). We only close
63 * down the fd when there are no more handles accessing it.
65 * More than one fd can currently access one file, but each fd
66 * has its own permsiions and offset.
69 struct yaffsfs_Inode {
70 int count; /* Number of handles accessing this inode */
71 struct yaffs_obj *iObj;
75 struct yaffsfs_DirSearchContext {
76 struct yaffs_dirent de; /* directory entry */
77 YCHAR name[NAME_MAX + 1]; /* name of directory being searched */
78 struct yaffs_obj *dirObj; /* ptr to directory being searched */
79 struct yaffs_obj *nextReturn; /* obj returned by next readddir */
80 struct list_head others;
85 struct yaffsfs_FileDes {
86 u8 isDir:1; /* This s a directory */
92 s32 inodeId:12; /* Index to corresponding yaffsfs_Inode */
93 s32 handleCount:10; /* Number of handles for this fd */
95 Y_LOFF_T position; /* current position in file */
100 struct yaffsfs_Handle {
106 static struct yaffsfs_DirSearchContext yaffsfs_dsc[YAFFSFS_N_DSC];
107 static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
108 static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
109 static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
111 static int yaffsfs_handlesInitialised;
113 unsigned yaffs_set_trace(unsigned tm)
115 yaffs_trace_mask = tm;
116 return yaffs_trace_mask;
119 unsigned yaffs_get_trace(void)
121 return yaffs_trace_mask;
126 * Inilitalise handle management on start-up.
129 static void yaffsfs_InitHandles(void)
133 if (yaffsfs_handlesInitialised)
136 yaffsfs_handlesInitialised = 1;
138 memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode));
139 memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd));
140 memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle));
141 memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc));
143 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
144 yaffsfs_fd[i].inodeId = -1;
145 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
146 yaffsfs_handle[i].fdId = -1;
149 static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
151 if (h >= 0 && h < YAFFSFS_N_HANDLES)
152 return &yaffsfs_handle[h];
156 static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
158 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
160 if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
161 return &yaffsfs_fd[h->fdId];
166 static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
168 struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
170 if (fd && fd->handleCount > 0 &&
171 fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
172 return &yaffsfs_inode[fd->inodeId];
177 static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
179 struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
188 * yaffsfs_FindInodeIdForObject
189 * Find the inode entry for an object, if it exists.
192 static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
198 obj = yaffs_get_equivalent_obj(obj);
200 /* Look for it in open inode table */
201 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
202 if (yaffsfs_inode[i].iObj == obj)
209 * yaffsfs_GetInodeIdForObject
210 * Grab an inode entry when opening a new inode.
212 static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
216 struct yaffsfs_Inode *in = NULL;
219 obj = yaffs_get_equivalent_obj(obj);
221 ret = yaffsfs_FindInodeIdForObject(obj);
223 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
224 if (!yaffsfs_inode[i].iObj)
229 in = &yaffsfs_inode[ret];
239 static int yaffsfs_CountHandles(struct yaffs_obj *obj)
241 int i = yaffsfs_FindInodeIdForObject(obj);
244 return yaffsfs_inode[i].count;
249 static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in)
251 struct yaffs_obj *obj;
254 obj->my_inode = NULL;
261 static void yaffsfs_PutInode(int inodeId)
263 if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) {
264 struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId];
266 if (in->count <= 0) {
267 yaffsfs_ReleaseInode(in);
273 static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr)
276 struct yaffsfs_Handle *h;
278 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
279 h = &yaffsfs_handle[i];
280 if (h->useCount < 1) {
281 memset(h, 0, sizeof(struct yaffsfs_Handle));
292 static int yaffsfs_NewHandleAndFileDes(void)
295 struct yaffsfs_FileDes *fd;
296 struct yaffsfs_Handle *h = NULL;
297 int handle = yaffsfs_NewHandle(&h);
302 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
304 if (fd->handleCount < 1) {
305 memset(fd, 0, sizeof(struct yaffsfs_FileDes));
313 /* Dump the handle because we could not get a fd */
320 * Increase use of handle when reading/writing a file
321 * Also gets the file descriptor.
324 static int yaffsfs_GetHandle(int handle)
326 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
328 if (h && h->useCount > 0) {
337 * Let go of a handle when closing a file or aborting an open or
338 * ending a read or write.
341 static int yaffsfs_PutFileDes(int fdId)
343 struct yaffsfs_FileDes *fd;
345 if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) {
346 fd = &yaffsfs_fd[fdId];
348 if (fd->handleCount < 1) {
350 yaffsfs_closedir_no_lock(fd->v.dir);
351 if (fd->inodeId >= 0) {
352 yaffsfs_PutInode(fd->inodeId);
360 static int yaffsfs_PutHandle(int handle)
362 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
364 if (h && h->useCount > 0) {
366 if (h->useCount < 1) {
367 yaffsfs_PutFileDes(h->fdId);
375 static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
377 struct yaffsfs_FileDes *fd;
378 struct yaffsfs_Handle *h;
379 struct yaffs_obj *obj;
381 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
382 h = yaffsfs_HandleToPointer(i);
383 fd = yaffsfs_HandleToFileDes(i);
384 obj = yaffsfs_HandleToObject(i);
385 if (h && h->useCount > 0) {
389 if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) {
391 yaffsfs_PutInode(fd->inodeId);
398 * Stuff to handle names.
400 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
401 #ifndef CONFIG_YAFFS_WINCE
402 static int yaffs_toupper(YCHAR a)
404 if (a >= 'a' && a <= 'z')
405 return (a - 'a') + 'A';
411 static int yaffsfs_Match(YCHAR a, YCHAR b)
413 return (yaffs_toupper(a) == yaffs_toupper(b));
416 static int yaffsfs_Match(YCHAR a, YCHAR b)
423 static int yaffsfs_IsPathDivider(YCHAR ch)
425 const YCHAR *str = YAFFS_PATH_DIVIDERS;
436 static int yaffsfs_CheckNameLength(const YCHAR *name)
440 int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1);
442 if (nameLength == 0) {
443 yaffsfs_SetError(-ENOENT);
445 } else if (nameLength > YAFFS_MAX_NAME_LENGTH) {
446 yaffsfs_SetError(-ENAMETOOLONG);
453 static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
455 YCHAR *alt_path = NULL;
460 * We don't have a definition for max path length.
461 * We will use 3 * max name length instead.
464 path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1);
466 /* If the last character is a path divider, then we need to
467 * trim it back so that the name look-up works properly.
468 * eg. /foo/new_dir/ -> /foo/newdir
469 * Curveball: Need to handle multiple path dividers:
470 * eg. /foof/sdfse///// -> /foo/sdfse
472 if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) {
473 alt_path = kmalloc(path_length + 1, 0);
476 yaffs_strcpy(alt_path, path);
477 for (i = path_length - 1;
478 i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--)
479 alt_path[i] = (YCHAR) 0;
481 *ret_path = alt_path;
485 LIST_HEAD(yaffsfs_deviceList);
490 * Scan the configuration list to find the device
491 * Curveballs: Should match paths that end in '/' too
492 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
494 static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
497 struct list_head *cfg;
498 const YCHAR *leftOver;
500 struct yaffs_dev *retval = NULL;
501 struct yaffs_dev *dev = NULL;
503 int longestMatch = -1;
507 * Check all configs, choose the one that:
508 * 1) Actually matches a prefix (ie /a amd /abc will not match
509 * 2) Matches the longest.
511 list_for_each(cfg, &yaffsfs_deviceList) {
512 dev = list_entry(cfg, struct yaffs_dev, dev_list);
521 while (matching && *p && *leftOver) {
522 /* Skip over any /s */
523 while (yaffsfs_IsPathDivider(*p))
526 /* Skip over any /s */
527 while (yaffsfs_IsPathDivider(*leftOver))
530 /* Now match the text part */
532 *p && !yaffsfs_IsPathDivider(*p) &&
533 *leftOver && !yaffsfs_IsPathDivider(*leftOver)) {
534 if (yaffsfs_Match(*p, *leftOver)) {
544 /* Skip over any /s in leftOver */
545 while (yaffsfs_IsPathDivider(*leftOver))
548 /*Skip over any /s in p */
549 while (yaffsfs_IsPathDivider(*p))
552 /* p should now be at the end of the string if fully matched */
556 if (matching && (thisMatchLength > longestMatch)) {
558 *restOfPath = (YCHAR *) leftOver;
560 longestMatch = thisMatchLength;
567 static int yaffsfs_CheckPath(const YCHAR *path)
572 while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) {
573 if (yaffsfs_IsPathDivider(*path)) {
581 return (*path) ? -1 : 0;
584 /* FindMountPoint only returns a dev entry if the path is a mount point */
585 static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
587 struct yaffs_dev *dev;
588 YCHAR *restOfPath = NULL;
590 dev = yaffsfs_FindDevice(path, &restOfPath);
591 if (dev && restOfPath && *restOfPath)
596 static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path,
599 struct yaffs_dev *dev;
601 dev = yaffsfs_FindDevice(path, restOfPath);
602 if (dev && dev->is_mounted)
603 return dev->root_dir;
608 static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
609 int symDepth, int *loop)
613 obj = yaffs_get_equivalent_obj(obj);
615 while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
616 YCHAR *alias = obj->variant.symlink_variant.alias;
618 if (yaffsfs_IsPathDivider(*alias))
620 * Starts with a /, need to scan from root up */
621 /* NB Might not work if this is called with root != NULL
623 obj = yaffsfs_FindObject(NULL, alias, symDepth++,
624 1, NULL, NULL, loop);
627 * Relative to here so use the parent of the
630 obj = yaffsfs_FindObject(obj->parent, alias, symDepth++,
631 1, NULL, NULL, loop);
637 * yaffsfs_FindDirectory
638 * Parse a path to determine the directory and the name within the directory.
640 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
642 static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
644 YCHAR **name, int symDepth,
645 int *notDir, int *loop)
647 struct yaffs_obj *dir;
649 YCHAR str[YAFFS_MAX_NAME_LENGTH + 1];
652 if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) {
660 restOfPath = (YCHAR *) path;
662 dir = yaffsfs_FindRoot(path, &restOfPath);
667 * curve ball: also throw away surplus '/'
668 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
670 while (yaffsfs_IsPathDivider(*restOfPath))
671 restOfPath++; /* get rid of '/' */
676 while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) {
677 if (i < YAFFS_MAX_NAME_LENGTH) {
678 str[i] = *restOfPath;
686 /* got to the end of the string */
689 if (yaffs_strcmp(str, _Y(".")) == 0) {
691 } else if (yaffs_strcmp(str, _Y("..")) == 0) {
694 dir = yaffs_find_by_name(dir, str);
696 dir = yaffsfs_FollowLink(dir, symDepth, loop);
698 if (dir && dir->variant_type !=
699 YAFFS_OBJECT_TYPE_DIRECTORY) {
708 /* directory did not exist. */
712 static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
716 int *notDir, int *loop)
718 return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir,
723 * yaffsfs_FindObject turns a path for an existing object into the object
725 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
726 const YCHAR *path, int symDepth,
728 struct yaffs_obj **dirOut,
729 int *notDir, int *loop)
731 struct yaffs_obj *dir;
732 struct yaffs_obj *obj;
736 yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop);
742 obj = yaffs_find_by_name(dir, name);
747 obj = yaffs_get_equivalent_obj(obj);
752 /*************************************************************************
753 * Start of yaffsfs visible functions.
754 *************************************************************************/
756 int yaffs_dup(int handle)
758 int newHandleNumber = -1;
759 struct yaffsfs_FileDes *existingFD = NULL;
760 struct yaffsfs_Handle *existingHandle = NULL;
761 struct yaffsfs_Handle *newHandle = NULL;
764 existingHandle = yaffsfs_HandleToPointer(handle);
765 existingFD = yaffsfs_HandleToFileDes(handle);
767 newHandleNumber = yaffsfs_NewHandle(&newHandle);
769 newHandle->fdId = existingHandle->fdId;
770 existingFD->handleCount++;
776 yaffsfs_SetError(-EBADF);
778 yaffsfs_SetError(-ENOMEM);
780 return newHandleNumber;
784 static int yaffsfs_TooManyObjects(struct yaffs_dev *dev)
786 u32 current_objects = dev->n_obj - dev->n_deleted_files;
788 if (dev->param.max_objects && current_objects > dev->param.max_objects)
794 int yaffs_open_sharing_reldir(struct yaffs_obj *reldir, const YCHAR *path,
795 int oflag, int mode, int sharing)
797 struct yaffs_obj *obj = NULL;
798 struct yaffs_obj *dir = NULL;
801 struct yaffsfs_FileDes *fd = NULL;
804 int errorReported = 0;
805 int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY);
806 u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
807 u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
808 u8 sharedReadAllowed;
809 u8 sharedWriteAllowed;
819 if (yaffsfs_CheckMemRegion(path, 0, 0)< 0) {
820 yaffsfs_SetError(-EFAULT);
824 if (yaffsfs_CheckPath(path) < 0) {
825 yaffsfs_SetError(-ENAMETOOLONG);
829 /* O_EXCL only has meaning if O_CREAT is specified */
830 if (!(oflag & O_CREAT))
833 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
834 if ((oflag & O_CREAT) & (oflag & O_EXCL))
837 /* Todo: Are there any more flag combos to sanitise ? */
839 /* Figure out if reading or writing is requested */
841 readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
842 writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
846 handle = yaffsfs_NewHandleAndFileDes();
849 yaffsfs_SetError(-ENFILE);
853 fd = yaffsfs_HandleToFileDes(handle);
855 /* try to find the exisiting object */
856 obj = yaffsfs_FindObject(reldir, path, 0, 1, NULL, NULL, NULL);
858 obj = yaffsfs_FollowLink(obj, symDepth++, &loop);
861 obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
862 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
867 /* The file already exists or it might be a directory */
868 is_dir = (obj->variant_type ==
869 YAFFS_OBJECT_TYPE_DIRECTORY);
871 /* A directory can't be opened except for read */
873 (writeRequested || !readRequested ||
874 (oflag & ~O_RDONLY))) {
876 yaffsfs_SetError(-EISDIR);
881 dsc = yaffsfs_opendir_reldir_no_lock(reldir, path);
884 yaffsfs_SetError(-ENFILE);
889 /* Open should fail if O_CREAT and O_EXCL are specified
890 * for a file that exists.
892 if (!errorReported &&
893 (oflag & O_EXCL) && (oflag & O_CREAT)) {
895 yaffsfs_SetError(-EEXIST);
899 /* Check file permissions */
900 if (readRequested && !(obj->yst_mode & S_IREAD))
903 if (writeRequested && !(obj->yst_mode & S_IWRITE))
906 if (!errorReported && writeRequested &&
907 obj->my_dev->read_only) {
909 yaffsfs_SetError(-EROFS);
913 if (openDenied && !errorReported) {
914 yaffsfs_SetError(-EACCES);
918 /* Check sharing of an existing object. */
920 struct yaffsfs_FileDes *fdx;
923 sharedReadAllowed = 1;
924 sharedWriteAllowed = 1;
927 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
928 fdx = &yaffsfs_fd[i];
929 if (fdx->handleCount > 0 &&
931 yaffsfs_inode[fdx->inodeId].iObj
934 sharedReadAllowed = 0;
935 if (!fdx->shareWrite)
936 sharedWriteAllowed = 0;
944 if ((!sharedReadAllowed && readRequested) ||
945 (!shareRead && alreadyReading) ||
946 (!sharedWriteAllowed && writeRequested) ||
947 (!shareWrite && alreadyWriting)) {
949 yaffsfs_SetError(-EBUSY);
956 /* If we could not open an existing object, then let's see if
957 * the directory exists. If not, error.
959 if (!obj && !errorReported) {
960 dir = yaffsfs_FindDirectory(reldir, path, &name, 0,
962 if (!dir && notDir) {
963 yaffsfs_SetError(-ENOTDIR);
966 yaffsfs_SetError(-ELOOP);
969 yaffsfs_SetError(-ENOENT);
974 if (!obj && dir && !errorReported && (oflag & O_CREAT)) {
975 /* Let's see if we can create this file */
976 if (dir->my_dev->read_only) {
977 yaffsfs_SetError(-EROFS);
979 } else if (yaffsfs_TooManyObjects(dir->my_dev)) {
980 yaffsfs_SetError(-ENFILE);
983 obj = yaffs_create_file(dir, name, mode, 0, 0);
985 if (!obj && !errorReported) {
986 yaffsfs_SetError(-ENOSPC);
991 if (!obj && dir && !errorReported && !(oflag & O_CREAT)) {
992 yaffsfs_SetError(-ENOENT);
996 if (obj && !openDenied) {
997 int inodeId = yaffsfs_GetInodeIdForObject(obj);
1001 * Todo: Fix any problem if inodes run out,
1002 * That can't happen if the number of inode
1003 * items >= number of handles.
1007 fd->inodeId = inodeId;
1008 fd->reading = readRequested;
1009 fd->writing = writeRequested;
1010 fd->append = (oflag & O_APPEND) ? 1 : 0;
1011 fd->shareRead = shareRead;
1012 fd->shareWrite = shareWrite;
1020 /* Hook inode to object */
1021 obj->my_inode = (void *)&yaffsfs_inode[inodeId];
1023 if (!is_dir && (oflag & O_TRUNC) && fd->writing)
1024 yaffs_resize_file(obj, 0);
1026 yaffsfs_PutHandle(handle);
1028 yaffsfs_SetError(0); /* Problem */
1038 int yaffs_open_sharing_reldev(struct yaffs_dev *dev, const YCHAR *path, int oflag,
1039 int mode, int sharing)
1041 return yaffs_open_sharing_reldir(ROOT_DIR(dev), path,
1042 oflag, mode, sharing);
1045 int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
1047 return yaffs_open_sharing_reldir(NULL, path, oflag, mode, sharing);
1050 int yaffs_open_reldir(struct yaffs_obj *reldir,const YCHAR *path, int oflag, int mode)
1052 return yaffs_open_sharing_reldir(reldir, path, oflag, mode,
1053 YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
1056 int yaffs_open_reldev(struct yaffs_dev *dev,const YCHAR *path, int oflag, int mode)
1058 return yaffs_open_sharing_reldir(ROOT_DIR(dev), path, oflag, mode,
1059 YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
1062 int yaffs_open(const YCHAR *path, int oflag, int mode)
1064 return yaffs_open_reldir(NULL, path, oflag, mode);
1067 static int yaffs_Dofsync(int handle, int datasync)
1070 struct yaffs_obj *obj;
1074 obj = yaffsfs_HandleToObject(handle);
1077 yaffsfs_SetError(-EBADF);
1078 else if (obj->my_dev->read_only)
1079 yaffsfs_SetError(-EROFS);
1081 yaffs_flush_file(obj, 1, datasync, 0);
1090 int yaffs_fsync(int handle)
1092 return yaffs_Dofsync(handle, 0);
1095 int yaffs_flush(int handle)
1097 return yaffs_fsync(handle);
1100 int yaffs_fdatasync(int handle)
1102 return yaffs_Dofsync(handle, 1);
1105 int yaffs_close(int handle)
1107 struct yaffsfs_Handle *h = NULL;
1108 struct yaffsfs_FileDes *f;
1109 struct yaffs_obj *obj = NULL;
1114 h = yaffsfs_HandleToPointer(handle);
1115 f = yaffsfs_HandleToFileDes(handle);
1116 obj = yaffsfs_HandleToObject(handle);
1118 if (!h || !obj || !f)
1119 yaffsfs_SetError(-EBADF);
1123 yaffs_flush_file(obj, 1, 0, 1);
1124 yaffsfs_PutHandle(handle);
1133 static int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte,
1134 int isPread, Y_LOFF_T offset)
1136 struct yaffsfs_FileDes *fd = NULL;
1137 struct yaffs_obj *obj = NULL;
1139 Y_LOFF_T startPos = 0;
1140 Y_LOFF_T endPos = 0;
1142 unsigned int nToRead = 0;
1145 u8 *buf = (u8 *) vbuf;
1147 if (yaffsfs_CheckMemRegion(vbuf, nbyte, 1) < 0) {
1148 yaffsfs_SetError(-EFAULT);
1153 fd = yaffsfs_HandleToFileDes(handle);
1154 obj = yaffsfs_HandleToObject(handle);
1158 yaffsfs_SetError(-EBADF);
1160 } else if (!fd->reading) {
1161 /* Not a reading handle */
1162 yaffsfs_SetError(-EINVAL);
1168 startPos = fd->v.position;
1172 if (yaffs_get_obj_length(obj) > pos)
1173 maxRead = yaffs_get_obj_length(obj) - pos;
1177 if ((Y_LOFF_T)nbyte > maxRead)
1180 yaffsfs_GetHandle(handle);
1182 endPos = pos + nbyte;
1184 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1185 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1191 nToRead = YAFFSFS_RW_SIZE -
1192 (pos & (YAFFSFS_RW_SIZE - 1));
1193 if (nToRead > nbyte)
1197 * Need to reverify object in case the device was
1198 * unmounted in another thread.
1200 obj = yaffsfs_HandleToObject(handle);
1204 nRead = yaffs_file_rd(obj, buf, pos, nToRead);
1212 if (nRead == (int)nToRead)
1215 nbyte = 0; /* no more to read */
1224 yaffsfs_PutHandle(handle);
1228 fd->v.position = startPos + totalRead;
1230 yaffsfs_SetError(-EINVAL);
1237 return (totalRead >= 0) ? totalRead : -1;
1241 int yaffs_read(int handle, void *buf, unsigned int nbyte)
1243 return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
1246 int yaffs_pread(int handle, void *buf, unsigned int nbyte, Y_LOFF_T offset)
1248 return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
1251 static int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
1252 int isPwrite, Y_LOFF_T offset)
1254 struct yaffsfs_FileDes *fd = NULL;
1255 struct yaffs_obj *obj = NULL;
1257 Y_LOFF_T startPos = 0;
1260 int totalWritten = 0;
1261 int write_trhrough = 0;
1262 unsigned int nToWrite = 0;
1263 const u8 *buf = (const u8 *)vbuf;
1265 if (yaffsfs_CheckMemRegion(vbuf, nbyte, 0) < 0) {
1266 yaffsfs_SetError(-EFAULT);
1271 fd = yaffsfs_HandleToFileDes(handle);
1272 obj = yaffsfs_HandleToObject(handle);
1276 yaffsfs_SetError(-EBADF);
1278 } else if (!fd->writing) {
1279 yaffsfs_SetError(-EINVAL);
1281 } else if (obj->my_dev->read_only) {
1282 yaffsfs_SetError(-EROFS);
1286 startPos = yaffs_get_obj_length(obj);
1290 startPos = fd->v.position;
1292 yaffsfs_GetHandle(handle);
1294 endPos = pos + nbyte;
1296 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1297 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1304 nToWrite = YAFFSFS_RW_SIZE -
1305 (pos & (YAFFSFS_RW_SIZE - 1));
1306 if (nToWrite > nbyte)
1310 * Need to reverify object in case the device was
1311 * remounted or unmounted in another thread.
1313 obj = yaffsfs_HandleToObject(handle);
1314 if (!obj || obj->my_dev->read_only)
1318 yaffs_wr_file(obj, buf, pos, nToWrite,
1321 totalWritten += nWritten;
1326 if (nWritten == (int)nToWrite)
1331 if (nWritten < 1 && totalWritten < 1) {
1332 yaffsfs_SetError(-ENOSPC);
1342 yaffsfs_PutHandle(handle);
1345 if (totalWritten > 0)
1346 fd->v.position = startPos + totalWritten;
1348 yaffsfs_SetError(-EINVAL);
1354 return (totalWritten >= 0) ? totalWritten : -1;
1357 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1359 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1362 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, Y_LOFF_T offset)
1364 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1367 int yaffs_truncate_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1370 struct yaffs_obj *obj = NULL;
1371 struct yaffs_obj *dir = NULL;
1372 int result = YAFFS_FAIL;
1376 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
1377 yaffsfs_SetError(-EFAULT);
1381 if (yaffsfs_CheckPath(path) < 0) {
1382 yaffsfs_SetError(-ENAMETOOLONG);
1388 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1389 obj = yaffsfs_FollowLink(obj, 0, &loop);
1392 yaffsfs_SetError(-ENOTDIR);
1394 yaffsfs_SetError(-ELOOP);
1395 else if (!dir || !obj)
1396 yaffsfs_SetError(-ENOENT);
1397 else if (obj->my_dev->read_only)
1398 yaffsfs_SetError(-EROFS);
1399 else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1400 yaffsfs_SetError(-EISDIR);
1401 else if (obj->my_dev->read_only)
1402 yaffsfs_SetError(-EROFS);
1403 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1404 yaffsfs_SetError(-EINVAL);
1406 result = yaffs_resize_file(obj, new_size);
1410 return (result) ? 0 : -1;
1413 int yaffs_truncate_reldev(struct yaffs_dev *dev, const YCHAR *path,
1416 return yaffs_truncate_reldir(ROOT_DIR(dev), path, new_size);
1419 int yaffs_truncate(const YCHAR *path, Y_LOFF_T new_size)
1421 return yaffs_truncate_reldir(NULL, path, new_size);
1424 int yaffs_ftruncate(int handle, Y_LOFF_T new_size)
1426 struct yaffsfs_FileDes *fd = NULL;
1427 struct yaffs_obj *obj = NULL;
1431 fd = yaffsfs_HandleToFileDes(handle);
1432 obj = yaffsfs_HandleToObject(handle);
1436 yaffsfs_SetError(-EBADF);
1437 else if (!fd->writing)
1438 yaffsfs_SetError(-EINVAL);
1439 else if (obj->my_dev->read_only)
1440 yaffsfs_SetError(-EROFS);
1441 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1442 yaffsfs_SetError(-EINVAL);
1444 /* resize the file */
1445 result = yaffs_resize_file(obj, new_size);
1448 return (result) ? 0 : -1;
1452 Y_LOFF_T yaffs_lseek(int handle, Y_LOFF_T offset, int whence)
1454 struct yaffsfs_FileDes *fd = NULL;
1455 struct yaffs_obj *obj = NULL;
1457 Y_LOFF_T fSize = -1;
1460 fd = yaffsfs_HandleToFileDes(handle);
1461 obj = yaffsfs_HandleToObject(handle);
1464 yaffsfs_SetError(-EBADF);
1465 else if (offset > YAFFS_MAX_FILE_SIZE)
1466 yaffsfs_SetError(-EINVAL);
1468 if (whence == SEEK_SET) {
1471 } else if (whence == SEEK_CUR) {
1472 if ((fd->v.position + offset) >= 0)
1473 pos = (fd->v.position + offset);
1474 } else if (whence == SEEK_END) {
1475 fSize = yaffs_get_obj_length(obj);
1476 if (fSize >= 0 && (fSize + offset) >= 0)
1477 pos = fSize + offset;
1480 if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1481 fd->v.position = pos;
1483 yaffsfs_SetError(-EINVAL);
1493 static int yaffsfs_DoUnlink_reldir(struct yaffs_obj *reldir,
1494 const YCHAR *path, int isDirectory)
1496 struct yaffs_obj *dir = NULL;
1497 struct yaffs_obj *obj = NULL;
1499 int result = YAFFS_FAIL;
1503 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
1504 yaffsfs_SetError(-EFAULT);
1508 if (yaffsfs_CheckPath(path) < 0) {
1509 yaffsfs_SetError(-ENAMETOOLONG);
1515 obj = yaffsfs_FindObject(reldir, path, 0, 0, NULL, NULL, NULL);
1516 dir = yaffsfs_FindDirectory(reldir, path, &name, 0, ¬Dir, &loop);
1519 yaffsfs_SetError(-ENOTDIR);
1521 yaffsfs_SetError(-ELOOP);
1523 yaffsfs_SetError(-ENOENT);
1524 else if (yaffs_strncmp(name, _Y("."), 2) == 0)
1525 yaffsfs_SetError(-EINVAL);
1527 yaffsfs_SetError(-ENOENT);
1528 else if (obj->my_dev->read_only)
1529 yaffsfs_SetError(-EROFS);
1530 else if (!isDirectory &&
1531 obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1532 yaffsfs_SetError(-EISDIR);
1533 else if (isDirectory &&
1534 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1535 yaffsfs_SetError(-ENOTDIR);
1536 else if (isDirectory && obj == obj->my_dev->root_dir)
1537 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1539 result = yaffs_unlinker(dir, name);
1541 if (result == YAFFS_FAIL && isDirectory)
1542 yaffsfs_SetError(-ENOTEMPTY);
1547 return (result == YAFFS_FAIL) ? -1 : 0;
1550 int yaffs_unlink_reldir(struct yaffs_obj *reldir, const YCHAR *path)
1552 return yaffsfs_DoUnlink_reldir(reldir, path, 0);
1555 int yaffs_unlink_reldev(struct yaffs_dev *dev, const YCHAR *path)
1557 return yaffsfs_DoUnlink_reldir(ROOT_DIR(dev), path, 0);
1560 int yaffs_unlink(const YCHAR *path)
1562 return yaffs_unlink_reldir(NULL, path);
1565 static int rename_file_over_dir(struct yaffs_obj *obj, struct yaffs_obj *newobj)
1567 if (obj && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY &&
1568 newobj && newobj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1574 static int rename_dir_over_file(struct yaffs_obj *obj, struct yaffs_obj *newobj)
1576 if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
1577 newobj && newobj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1583 int yaffs_rename_reldir(struct yaffs_obj *reldir,
1584 const YCHAR *oldPath, const YCHAR *newPath)
1586 struct yaffs_obj *olddir = NULL;
1587 struct yaffs_obj *newdir = NULL;
1588 struct yaffs_obj *obj = NULL;
1589 struct yaffs_obj *newobj = NULL;
1592 int result = YAFFS_FAIL;
1593 int rename_allowed = 1;
1599 YCHAR *alt_newpath = NULL;
1601 if (yaffsfs_CheckMemRegion(oldPath, 0, 0) < 0 ||
1602 yaffsfs_CheckMemRegion(newPath, 0, 0) < 0) {
1603 yaffsfs_SetError(-EFAULT);
1607 if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) {
1608 yaffsfs_SetError(-ENAMETOOLONG);
1612 if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) {
1613 yaffsfs_SetError(-ENOMEM);
1617 newPath = alt_newpath;
1621 olddir = yaffsfs_FindDirectory(reldir, oldPath, &oldname, 0,
1622 ¬OldDir, &oldLoop);
1623 newdir = yaffsfs_FindDirectory(reldir, newPath, &newname, 0,
1624 ¬NewDir, &newLoop);
1625 obj = yaffsfs_FindObject(reldir, oldPath, 0, 0, NULL, NULL, NULL);
1626 newobj = yaffsfs_FindObject(reldir, newPath, 0, 0, NULL, NULL, NULL);
1628 /* If the object being renamed is a directory and the
1629 * path ended with a "/" then the olddir == obj.
1630 * We pass through NULL for the old name to tell the lower layers
1631 * to use olddir as the object.
1637 if ((!olddir && notOldDir) || (!newdir && notNewDir)) {
1638 yaffsfs_SetError(-ENOTDIR);
1640 } else if (oldLoop || newLoop) {
1641 yaffsfs_SetError(-ELOOP);
1643 } else if (olddir && oldname &&
1644 yaffs_strncmp(oldname, _Y("."), 2) == 0) {
1645 yaffsfs_SetError(-EINVAL);
1647 } else if (!olddir || !newdir || !obj) {
1648 yaffsfs_SetError(-ENOENT);
1650 } else if (obj->my_dev->read_only) {
1651 yaffsfs_SetError(-EROFS);
1653 } else if (rename_file_over_dir(obj, newobj)) {
1654 yaffsfs_SetError(-EISDIR);
1656 } else if (rename_dir_over_file(obj, newobj)) {
1657 yaffsfs_SetError(-ENOTDIR);
1659 } else if (yaffs_is_non_empty_dir(newobj)) {
1660 yaffsfs_SetError(-ENOTEMPTY);
1662 } else if (olddir->my_dev != newdir->my_dev) {
1663 /* Rename must be on same device */
1664 yaffsfs_SetError(-EXDEV);
1666 } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1668 * It is a directory, check that it is not being renamed to
1669 * being its own decendent.
1670 * Do this by tracing from the new directory back to the root,
1674 struct yaffs_obj *xx = newdir;
1676 while (rename_allowed && xx) {
1681 if (!rename_allowed)
1682 yaffsfs_SetError(-EINVAL);
1686 result = yaffs_rename_obj(olddir, oldname, newdir, newname);
1692 return (result == YAFFS_FAIL) ? -1 : 0;
1695 int yaffs_rename_reldev(struct yaffs_dev *dev, const YCHAR *oldPath,
1696 const YCHAR *newPath)
1698 return yaffs_rename_reldir(ROOT_DIR(dev), oldPath, newPath);
1700 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1702 return yaffs_rename_reldir(NULL, oldPath, newPath);
1705 static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf)
1709 obj = yaffs_get_equivalent_obj(obj);
1713 buf->st_ino = obj->obj_id;
1714 buf->st_mode = obj->yst_mode & ~S_IFMT;
1716 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1717 buf->st_mode |= S_IFDIR;
1718 else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1719 buf->st_mode |= S_IFLNK;
1720 else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1721 buf->st_mode |= S_IFREG;
1723 buf->st_nlink = yaffs_get_obj_link_count(obj);
1726 buf->st_rdev = obj->yst_rdev;
1727 buf->st_size = yaffs_get_obj_length(obj);
1728 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1729 buf->st_blocks = (buf->st_size + buf->st_blksize - 1) /
1731 #if CONFIG_YAFFS_WINCE
1732 buf->yst_wince_atime[0] = obj->win_atime[0];
1733 buf->yst_wince_atime[1] = obj->win_atime[1];
1734 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1735 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1736 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1737 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1739 buf->yst_atime = obj->yst_atime;
1740 buf->yst_ctime = obj->yst_ctime;
1741 buf->yst_mtime = obj->yst_mtime;
1748 static int yaffsfs_DoStatOrLStat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1749 struct yaffs_stat *buf, int doLStat)
1751 struct yaffs_obj *obj = NULL;
1752 struct yaffs_obj *dir = NULL;
1757 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
1758 yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
1759 yaffsfs_SetError(-EFAULT);
1763 if (yaffsfs_CheckPath(path) < 0) {
1764 yaffsfs_SetError(-ENAMETOOLONG);
1770 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1772 if (!doLStat && obj)
1773 obj = yaffsfs_FollowLink(obj, 0, &loop);
1776 yaffsfs_SetError(-ENOTDIR);
1778 yaffsfs_SetError(-ELOOP);
1779 else if (!dir || !obj)
1780 yaffsfs_SetError(-ENOENT);
1782 retVal = yaffsfs_DoStat(obj, buf);
1790 int yaffs_stat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1791 struct yaffs_stat *buf)
1793 return yaffsfs_DoStatOrLStat_reldir(reldir, path, buf, 0);
1796 int yaffs_lstat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1797 struct yaffs_stat *buf)
1799 return yaffsfs_DoStatOrLStat_reldir(reldir, path, buf, 1);
1802 int yaffs_stat_reldev(struct yaffs_dev *dev, const YCHAR *path,
1803 struct yaffs_stat *buf)
1805 return yaffsfs_DoStatOrLStat_reldir(ROOT_DIR(dev), path, buf, 0);
1808 int yaffs_lstat_reldev(struct yaffs_dev *dev, const YCHAR *path,
1809 struct yaffs_stat *buf)
1811 return yaffsfs_DoStatOrLStat_reldir(ROOT_DIR(dev), path, buf, 1);
1814 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1816 return yaffs_stat_reldir(NULL, path, buf);
1819 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1821 return yaffs_lstat_reldir(NULL, path, buf);
1824 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1826 struct yaffs_obj *obj;
1830 if (yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
1831 yaffsfs_SetError(-EFAULT);
1836 obj = yaffsfs_HandleToObject(fd);
1839 retVal = yaffsfs_DoStat(obj, buf);
1842 yaffsfs_SetError(-EBADF);
1849 static int yaffsfs_DoUtime(struct yaffs_obj *obj,
1850 const struct yaffs_utimbuf *buf)
1854 obj = yaffs_get_equivalent_obj(obj);
1856 if (obj && obj->my_dev->read_only) {
1857 yaffsfs_SetError(-EROFS);
1861 #if !CONFIG_YAFFS_WINCE
1863 struct yaffs_utimbuf local;
1866 local.actime = Y_CURRENT_TIME;
1867 local.modtime = local.actime;
1874 obj->yst_atime = buf->actime;
1875 obj->yst_mtime = buf->modtime;
1877 result = yaffs_flush_file(obj, 0, 0, 0);
1878 retVal = result == YAFFS_OK ? 0 : -1;
1886 int yaffs_utime_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1887 const struct yaffs_utimbuf *buf)
1889 struct yaffs_obj *obj = NULL;
1890 struct yaffs_obj *dir = NULL;
1896 yaffsfs_SetError(-EFAULT);
1900 if (yaffsfs_CheckPath(path) < 0) {
1901 yaffsfs_SetError(-ENAMETOOLONG);
1907 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1910 yaffsfs_SetError(-ENOTDIR);
1912 yaffsfs_SetError(-ELOOP);
1913 else if (!dir || !obj)
1914 yaffsfs_SetError(-ENOENT);
1916 retVal = yaffsfs_DoUtime(obj, buf);
1924 int yaffs_utime_reldev(struct yaffs_dev *dev, const YCHAR *path,
1925 const struct yaffs_utimbuf *buf)
1927 return yaffs_utime_reldir(ROOT_DIR(dev), path, buf);
1930 int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf)
1932 return yaffs_utime_reldir(NULL, path, buf);
1935 int yaffs_futime(int fd, const struct yaffs_utimbuf *buf)
1937 struct yaffs_obj *obj;
1942 obj = yaffsfs_HandleToObject(fd);
1945 retVal = yaffsfs_DoUtime(obj, buf);
1948 yaffsfs_SetError(-EBADF);
1955 #ifndef CONFIG_YAFFS_WINCE
1956 /* xattrib functions */
1958 static int yaffs_do_setxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1959 const char *name, const void *data, int size,
1960 int flags, int follow)
1962 struct yaffs_obj *obj;
1963 struct yaffs_obj *dir;
1969 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
1970 yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
1971 yaffsfs_CheckMemRegion(data, size, 0) < 0) {
1972 yaffsfs_SetError(-EFAULT);
1976 if (yaffsfs_CheckPath(path) < 0) {
1977 yaffsfs_SetError(-ENAMETOOLONG);
1983 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1986 obj = yaffsfs_FollowLink(obj, 0, &loop);
1989 yaffsfs_SetError(-ENOTDIR);
1991 yaffsfs_SetError(-ELOOP);
1992 else if (!dir || !obj)
1993 yaffsfs_SetError(-ENOENT);
1995 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
1997 yaffsfs_SetError(retVal);
2008 int yaffs_setxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2009 const char *name, const void *data, int size, int flags)
2011 return yaffs_do_setxattr_reldir(reldir, path, name, data, size, flags, 1);
2014 int yaffs_setxattr_reldev(struct yaffs_dev *dev, const YCHAR *path,
2015 const char *name, const void *data, int size, int flags)
2017 return yaffs_setxattr_reldir(ROOT_DIR(dev), path, name, data, size, flags);
2020 int yaffs_setxattr(const YCHAR *path, const char *name,
2021 const void *data, int size, int flags)
2023 return yaffs_setxattr_reldir(NULL, path, name, data, size, flags);
2026 int yaffs_lsetxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path, const char *name,
2027 const void *data, int size, int flags)
2029 return yaffs_do_setxattr_reldir(reldir, path, name, data, size, flags, 0);
2032 int yaffs_lsetxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name,
2033 const void *data, int size, int flags)
2035 return yaffs_lsetxattr_reldir(ROOT_DIR(dev), path, name, data, size, flags);
2038 int yaffs_lsetxattr(const YCHAR *path, const char *name,
2039 const void *data, int size, int flags)
2041 return yaffs_lsetxattr_reldir(NULL, path, name, data, size, flags);
2044 int yaffs_fsetxattr(int fd, const char *name,
2045 const void *data, int size, int flags)
2047 struct yaffs_obj *obj;
2051 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2052 yaffsfs_CheckMemRegion(data, size, 0) < 0) {
2053 yaffsfs_SetError(-EFAULT);
2058 obj = yaffsfs_HandleToObject(fd);
2061 yaffsfs_SetError(-EBADF);
2063 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
2065 yaffsfs_SetError(retVal);
2075 static int yaffs_do_getxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2076 const char *name, void *data, int size, int follow)
2078 struct yaffs_obj *obj;
2079 struct yaffs_obj *dir;
2084 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2085 yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2086 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2087 yaffsfs_SetError(-EFAULT);
2091 if (yaffsfs_CheckPath(path) < 0) {
2092 yaffsfs_SetError(-ENAMETOOLONG);
2098 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2101 obj = yaffsfs_FollowLink(obj, 0, &loop);
2104 yaffsfs_SetError(-ENOTDIR);
2106 yaffsfs_SetError(-ELOOP);
2107 else if (!dir || !obj)
2108 yaffsfs_SetError(-ENOENT);
2110 retVal = yaffs_get_xattrib(obj, name, data, size);
2112 yaffsfs_SetError(retVal);
2122 int yaffs_getxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2123 const char *name, void *data, int size)
2125 return yaffs_do_getxattr_reldir(reldir, path, name, data, size, 1);
2128 int yaffs_getxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name, void *data, int size)
2130 return yaffs_getxattr_reldir(ROOT_DIR(dev), path, name, data, size);
2133 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
2135 return yaffs_getxattr_reldir(NULL, path, name, data, size);
2138 int yaffs_lgetxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2139 const char *name, void *data, int size)
2141 return yaffs_do_getxattr_reldir(reldir, path, name, data, size, 0);
2144 int yaffs_lgetxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name, void *data, int size)
2146 return yaffs_lgetxattr_reldir(ROOT_DIR(dev), path, name, data, size);
2149 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
2151 return yaffs_lgetxattr_reldir(NULL, path, name, data, size);
2154 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
2156 struct yaffs_obj *obj;
2160 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2161 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2162 yaffsfs_SetError(-EFAULT);
2167 obj = yaffsfs_HandleToObject(fd);
2170 retVal = yaffs_get_xattrib(obj, name, data, size);
2172 yaffsfs_SetError(retVal);
2177 yaffsfs_SetError(-EBADF);
2184 static int yaffs_do_listxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2185 char *data, int size, int follow)
2187 struct yaffs_obj *obj = NULL;
2188 struct yaffs_obj *dir = NULL;
2193 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2194 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2195 yaffsfs_SetError(-EFAULT);
2199 if (yaffsfs_CheckPath(path) < 0) {
2200 yaffsfs_SetError(-ENAMETOOLONG);
2206 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2209 obj = yaffsfs_FollowLink(obj, 0, &loop);
2212 yaffsfs_SetError(-ENOTDIR);
2214 yaffsfs_SetError(-ELOOP);
2215 else if (!dir || !obj)
2216 yaffsfs_SetError(-ENOENT);
2218 retVal = yaffs_list_xattrib(obj, data, size);
2220 yaffsfs_SetError(retVal);
2231 int yaffs_listxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2232 char *data, int size)
2234 return yaffs_do_listxattr_reldir(reldir, path, data, size, 1);
2237 int yaffs_listxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, char *data, int size)
2239 return yaffs_listxattr_reldir(ROOT_DIR(dev), path, data, size);
2242 int yaffs_listxattr(const YCHAR *path, char *data, int size)
2244 return yaffs_listxattr_reldir(NULL, path, data, size);
2247 int yaffs_llistxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2248 char *data, int size)
2250 return yaffs_do_listxattr_reldir(reldir, path, data, size, 0);
2253 int yaffs_llistxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, char *data, int size)
2255 return yaffs_llistxattr_reldir(ROOT_DIR(dev), path, data, size);
2258 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
2260 return yaffs_llistxattr_reldir(NULL, path, data, size);
2263 int yaffs_flistxattr(int fd, char *data, int size)
2265 struct yaffs_obj *obj;
2269 if (yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2270 yaffsfs_SetError(-EFAULT);
2275 obj = yaffsfs_HandleToObject(fd);
2278 retVal = yaffs_list_xattrib(obj, data, size);
2280 yaffsfs_SetError(retVal);
2285 yaffsfs_SetError(-EBADF);
2292 static int yaffs_do_removexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2293 const char *name, int follow)
2295 struct yaffs_obj *obj = NULL;
2296 struct yaffs_obj *dir = NULL;
2301 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2302 yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
2303 yaffsfs_SetError(-EFAULT);
2307 if (yaffsfs_CheckPath(path) < 0) {
2308 yaffsfs_SetError(-ENAMETOOLONG);
2314 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2317 obj = yaffsfs_FollowLink(obj, 0, &loop);
2320 yaffsfs_SetError(-ENOTDIR);
2322 yaffsfs_SetError(-ELOOP);
2323 else if (!dir || !obj)
2324 yaffsfs_SetError(-ENOENT);
2326 retVal = yaffs_remove_xattrib(obj, name);
2328 yaffsfs_SetError(retVal);
2339 int yaffs_removexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2342 return yaffs_do_removexattr_reldir(reldir, path, name, 1);
2345 int yaffs_removexattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name)
2347 return yaffs_removexattr_reldir(ROOT_DIR(dev), path, name);
2350 int yaffs_removexattr(const YCHAR *path, const char *name)
2352 return yaffs_removexattr_reldir(NULL, path, name);
2355 int yaffs_lremovexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2358 return yaffs_do_removexattr_reldir(reldir, path, name, 0);
2361 int yaffs_lremovexattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name)
2363 return yaffs_lremovexattr_reldir(ROOT_DIR(dev), path, name);
2366 int yaffs_lremovexattr(const YCHAR *path, const char *name)
2368 return yaffs_lremovexattr_reldir(NULL, path, name);
2371 int yaffs_fremovexattr(int fd, const char *name)
2373 struct yaffs_obj *obj;
2377 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
2378 yaffsfs_SetError(-EFAULT);
2383 obj = yaffsfs_HandleToObject(fd);
2386 retVal = yaffs_remove_xattrib(obj, name);
2388 yaffsfs_SetError(retVal);
2393 yaffsfs_SetError(-EBADF);
2401 #ifdef CONFIG_YAFFS_WINCE
2402 int yaffs_get_wince_times(int fd, unsigned *wctime,
2403 unsigned *watime, unsigned *wmtime)
2405 struct yaffs_obj *obj;
2410 obj = yaffsfs_HandleToObject(fd);
2415 wctime[0] = obj->win_ctime[0];
2416 wctime[1] = obj->win_ctime[1];
2419 watime[0] = obj->win_atime[0];
2420 watime[1] = obj->win_atime[1];
2423 wmtime[0] = obj->win_mtime[0];
2424 wmtime[1] = obj->win_mtime[1];
2430 yaffsfs_SetError(-EBADF);
2437 int yaffs_set_wince_times(int fd,
2438 const unsigned *wctime,
2439 const unsigned *watime, const unsigned *wmtime)
2441 struct yaffs_obj *obj;
2446 obj = yaffsfs_HandleToObject(fd);
2451 obj->win_ctime[0] = wctime[0];
2452 obj->win_ctime[1] = wctime[1];
2455 obj->win_atime[0] = watime[0];
2456 obj->win_atime[1] = watime[1];
2459 obj->win_mtime[0] = wmtime[0];
2460 obj->win_mtime[1] = wmtime[1];
2464 result = yaffs_flush_file(obj, 0, 0, 0);
2468 yaffsfs_SetError(-EBADF);
2477 static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode)
2482 obj = yaffs_get_equivalent_obj(obj);
2485 obj->yst_mode = mode;
2487 result = yaffs_flush_file(obj, 0, 0, 0);
2490 return result == YAFFS_OK ? 0 : -1;
2493 int yaffs_access_reldir(struct yaffs_obj *reldir, const YCHAR *path, int amode)
2495 struct yaffs_obj *obj = NULL;
2496 struct yaffs_obj *dir = NULL;
2501 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2502 yaffsfs_SetError(-EFAULT);
2506 if (yaffsfs_CheckPath(path) < 0) {
2507 yaffsfs_SetError(-ENAMETOOLONG);
2511 if (amode & ~(R_OK | W_OK | X_OK)) {
2512 yaffsfs_SetError(-EINVAL);
2518 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2519 obj = yaffsfs_FollowLink(obj, 0, &loop);
2522 yaffsfs_SetError(-ENOTDIR);
2524 yaffsfs_SetError(-ELOOP);
2525 else if (!dir || !obj)
2526 yaffsfs_SetError(-ENOENT);
2527 else if ((amode & W_OK) && obj->my_dev->read_only)
2528 yaffsfs_SetError(-EROFS);
2532 if ((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2534 if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2536 if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2540 yaffsfs_SetError(-EACCES);
2551 int yaffs_access_reldev(struct yaffs_dev *dev, const YCHAR *path, int amode)
2553 return yaffs_access_reldir(ROOT_DIR(dev), path, amode);
2556 int yaffs_access(const YCHAR *path, int amode)
2558 return yaffs_access_reldir(NULL, path, amode);
2561 int yaffs_chmod_reldir(struct yaffs_obj *reldir, const YCHAR *path, mode_t mode)
2563 struct yaffs_obj *obj = NULL;
2564 struct yaffs_obj *dir = NULL;
2569 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2570 yaffsfs_SetError(-EFAULT);
2574 if (yaffsfs_CheckPath(path) < 0) {
2575 yaffsfs_SetError(-ENAMETOOLONG);
2579 if (mode & ~(0777)) {
2580 yaffsfs_SetError(-EINVAL);
2586 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2587 obj = yaffsfs_FollowLink(obj, 0, &loop);
2590 yaffsfs_SetError(-ENOTDIR);
2592 yaffsfs_SetError(-ELOOP);
2593 else if (!dir || !obj)
2594 yaffsfs_SetError(-ENOENT);
2595 else if (obj->my_dev->read_only)
2596 yaffsfs_SetError(-EROFS);
2598 retVal = yaffsfs_DoChMod(obj, mode);
2606 int yaffs_chmod_reldev(struct yaffs_dev *dev, const YCHAR *path, mode_t mode)
2608 return yaffs_chmod_reldir(ROOT_DIR(dev), path, mode);
2611 int yaffs_chmod(const YCHAR *path, mode_t mode)
2613 return yaffs_chmod_reldir(NULL, path, mode);
2616 int yaffs_fchmod(int fd, mode_t mode)
2618 struct yaffs_obj *obj;
2621 if (mode & ~(0777)) {
2622 yaffsfs_SetError(-EINVAL);
2627 obj = yaffsfs_HandleToObject(fd);
2630 yaffsfs_SetError(-EBADF);
2631 else if (obj->my_dev->read_only)
2632 yaffsfs_SetError(-EROFS);
2634 retVal = yaffsfs_DoChMod(obj, mode);
2641 int yaffs_mkdir_reldir(struct yaffs_obj *reldir, const YCHAR *path, mode_t mode)
2643 struct yaffs_obj *parent = NULL;
2644 struct yaffs_obj *dir = NULL;
2646 YCHAR *alt_path = NULL;
2651 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2652 yaffsfs_SetError(-EFAULT);
2656 if (yaffsfs_CheckPath(path) < 0) {
2657 yaffsfs_SetError(-ENAMETOOLONG);
2661 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2662 yaffsfs_SetError(-ENOMEM);
2669 parent = yaffsfs_FindDirectory(reldir, path, &name, 0, ¬Dir, &loop);
2670 if (!parent && notDir)
2671 yaffsfs_SetError(-ENOTDIR);
2673 yaffsfs_SetError(-ELOOP);
2675 yaffsfs_SetError(-ENOENT);
2676 else if (yaffsfs_TooManyObjects(parent->my_dev))
2677 yaffsfs_SetError(-ENFILE);
2678 else if (yaffs_strnlen(name, 5) == 0) {
2679 /* Trying to make the root itself */
2680 yaffsfs_SetError(-EEXIST);
2681 } else if (parent->my_dev->read_only)
2682 yaffsfs_SetError(-EROFS);
2684 dir = yaffs_create_dir(parent, name, mode, 0, 0);
2687 else if (yaffs_find_by_name(parent, name))
2688 yaffsfs_SetError(-EEXIST); /* name exists */
2690 yaffsfs_SetError(-ENOSPC); /* assume no space */
2700 int yaffs_mkdir_reldev(struct yaffs_dev *dev, const YCHAR *path, mode_t mode)
2702 return yaffs_mkdir_reldir(ROOT_DIR(dev), path, mode);
2705 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2707 return yaffs_mkdir_reldir(NULL, path, mode);
2710 int yaffs_rmdir_reldir(struct yaffs_obj *reldir, const YCHAR *path)
2715 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2716 yaffsfs_SetError(-EFAULT);
2720 if (yaffsfs_CheckPath(path) < 0) {
2721 yaffsfs_SetError(-ENAMETOOLONG);
2725 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2726 yaffsfs_SetError(-ENOMEM);
2731 result = yaffsfs_DoUnlink_reldir(reldir, path, 1);
2738 int yaffs_rmdir_reldev(struct yaffs_dev *dev, const YCHAR *path)
2740 return yaffs_rmdir_reldir(ROOT_DIR(dev), path);
2743 int yaffs_rmdir(const YCHAR *path)
2745 return yaffs_rmdir_reldir(NULL, path);
2749 * The mount/unmount/sync functions act on devices rather than reldirs.
2751 void *yaffs_getdev(const YCHAR *path)
2753 struct yaffs_dev *dev = NULL;
2755 dev = yaffsfs_FindDevice(path, &dummy);
2759 int yaffs_mount_common(struct yaffs_dev *dev, const YCHAR *path,
2760 int read_only, int skip_checkpt)
2763 int result = YAFFS_FAIL;
2766 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2767 yaffsfs_SetError(-EFAULT);
2771 yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path);
2773 if (yaffsfs_CheckPath(path) < 0) {
2774 yaffsfs_SetError(-ENAMETOOLONG);
2781 yaffsfs_InitHandles();
2784 dev = yaffsfs_FindMountPoint(path);
2787 if (!dev->is_mounted) {
2788 dev->read_only = read_only ? 1 : 0;
2790 u8 skip = dev->param.skip_checkpt_rd;
2791 dev->param.skip_checkpt_rd = 1;
2792 result = yaffs_guts_initialise(dev);
2793 dev->param.skip_checkpt_rd = skip;
2795 result = yaffs_guts_initialise(dev);
2798 if (result == YAFFS_FAIL)
2799 yaffsfs_SetError(-ENOMEM);
2800 retVal = result ? 0 : -1;
2803 yaffsfs_SetError(-EBUSY);
2805 yaffsfs_SetError(-ENODEV);
2812 int yaffs_mount3_reldev(struct yaffs_dev *dev, int read_only, int skip_checkpt)
2814 return yaffs_mount_common(dev, NULL, read_only, skip_checkpt);
2817 int yaffs_mount3(const YCHAR *path, int read_only, int skip_checkpt)
2819 return yaffs_mount_common(NULL, path, read_only, skip_checkpt);
2822 int yaffs_mount2_reldev(struct yaffs_dev *dev, int readonly)
2824 return yaffs_mount_common(dev, NULL, readonly, 0);
2827 int yaffs_mount2(const YCHAR *path, int readonly)
2829 return yaffs_mount_common(NULL, path, readonly, 0);
2832 int yaffs_mount_reldev(struct yaffs_dev *dev)
2834 return yaffs_mount_common(dev, NULL, 0, 0);
2837 int yaffs_mount(const YCHAR *path)
2839 return yaffs_mount_common(NULL, path, 0, 0);
2842 int yaffs_sync_common(struct yaffs_dev *dev, const YCHAR *path)
2848 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2849 yaffsfs_SetError(-EFAULT);
2853 if (yaffsfs_CheckPath(path) < 0) {
2854 yaffsfs_SetError(-ENAMETOOLONG);
2861 dev = yaffsfs_FindDevice(path, &dummy);
2864 if (!dev->is_mounted)
2865 yaffsfs_SetError(-EINVAL);
2866 else if (dev->read_only)
2867 yaffsfs_SetError(-EROFS);
2870 yaffs_flush_whole_cache(dev, 0);
2871 yaffs_checkpoint_save(dev);
2876 yaffsfs_SetError(-ENODEV);
2882 int yaffs_sync_reldev(struct yaffs_dev *dev)
2884 return yaffs_sync_common(dev, NULL);
2887 int yaffs_sync(const YCHAR *path)
2889 return yaffs_sync_common(NULL, path);
2893 static int yaffsfs_bg_gc_common(struct yaffs_dev *dev,
2901 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2902 yaffsfs_SetError(-EFAULT);
2906 if (yaffsfs_CheckPath(path) < 0) {
2907 yaffsfs_SetError(-ENAMETOOLONG);
2914 dev = yaffsfs_FindDevice(path, &dummy);
2917 if (!dev->is_mounted)
2918 yaffsfs_SetError(-EINVAL);
2920 retVal = yaffs_bg_gc(dev, urgency);
2922 yaffsfs_SetError(-ENODEV);
2928 /* Background gc functions.
2929 * These return 0 when bg done or greater than 0 when gc has been
2930 * done and there is still a lot of garbage to be cleaned up.
2933 int yaffs_do_background_gc(const YCHAR *path, int urgency)
2935 return yaffsfs_bg_gc_common(NULL, path, urgency);
2938 int yaffs_do_background_gc_reldev(struct yaffs_dev *dev, int urgency)
2940 return yaffsfs_bg_gc_common(dev, NULL, urgency);
2943 static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
2946 struct yaffs_obj *obj;
2948 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
2949 obj = yaffsfs_HandleToObject(i);
2950 if (obj && obj->my_dev == dev)
2956 int yaffs_remount_common(struct yaffs_dev *dev, const YCHAR *path,
2957 int force, int read_only)
2961 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2962 yaffsfs_SetError(-EFAULT);
2966 if (yaffsfs_CheckPath(path) < 0) {
2967 yaffsfs_SetError(-ENAMETOOLONG);
2973 dev = yaffsfs_FindMountPoint(path);
2976 if (dev->is_mounted) {
2977 yaffs_flush_whole_cache(dev, 0);
2979 if (force || !yaffsfs_IsDevBusy(dev)) {
2981 yaffs_checkpoint_save(dev);
2982 dev->read_only = read_only ? 1 : 0;
2985 yaffsfs_SetError(-EBUSY);
2988 yaffsfs_SetError(-EINVAL);
2991 yaffsfs_SetError(-ENODEV);
2998 int yaffs_remount_reldev(struct yaffs_dev *dev, int force, int read_only)
3000 return yaffs_remount_common(dev, NULL, force, read_only);
3002 int yaffs_remount(const YCHAR *path, int force, int read_only)
3004 return yaffs_remount_common(NULL, path, force, read_only);
3007 int yaffs_unmount2_common(struct yaffs_dev *dev, const YCHAR *path, int force)
3011 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3012 yaffsfs_SetError(-EFAULT);
3016 if (yaffsfs_CheckPath(path) < 0) {
3017 yaffsfs_SetError(-ENAMETOOLONG);
3023 dev = yaffsfs_FindMountPoint(path);
3026 if (dev->is_mounted) {
3028 yaffs_flush_whole_cache(dev, 0);
3029 yaffs_checkpoint_save(dev);
3030 inUse = yaffsfs_IsDevBusy(dev);
3031 if (!inUse || force) {
3033 yaffsfs_BreakDeviceHandles(dev);
3034 yaffs_deinitialise(dev);
3038 yaffsfs_SetError(-EBUSY);
3041 yaffsfs_SetError(-EINVAL);
3044 yaffsfs_SetError(-ENODEV);
3051 int yaffs_unmount2_reldev(struct yaffs_dev *dev, int force)
3053 return yaffs_unmount2_common(dev, NULL, force);
3056 int yaffs_unmount2(const YCHAR *path, int force)
3058 return yaffs_unmount2_common(NULL, path, force);
3061 int yaffs_unmount_reldev(struct yaffs_dev *dev)
3063 return yaffs_unmount2_reldev(dev, 0);
3066 int yaffs_unmount(const YCHAR *path)
3068 return yaffs_unmount2(path, 0);
3071 int yaffs_format_common(struct yaffs_dev *dev,
3074 int force_unmount_flag,
3082 yaffsfs_SetError(-EFAULT);
3086 if (yaffsfs_CheckPath(path) < 0) {
3087 yaffsfs_SetError(-ENAMETOOLONG);
3094 dev = yaffsfs_FindMountPoint(path);
3097 int was_mounted = dev->is_mounted;
3099 if (dev->is_mounted && unmount_flag) {
3101 yaffs_flush_whole_cache(dev, 0);
3102 yaffs_checkpoint_save(dev);
3103 inUse = yaffsfs_IsDevBusy(dev);
3104 if (!inUse || force_unmount_flag) {
3106 yaffsfs_BreakDeviceHandles(dev);
3107 yaffs_deinitialise(dev);
3111 if(dev->is_mounted) {
3112 yaffsfs_SetError(-EBUSY);
3115 yaffs_guts_format_dev(dev);
3116 if(was_mounted && remount_flag) {
3117 result = yaffs_guts_initialise(dev);
3118 if (result == YAFFS_FAIL) {
3119 yaffsfs_SetError(-ENOMEM);
3125 yaffsfs_SetError(-ENODEV);
3134 int yaffs_format_reldev(struct yaffs_dev *dev,
3136 int force_unmount_flag,
3139 return yaffs_format_common(dev, NULL, unmount_flag,
3140 force_unmount_flag, remount_flag);
3143 int yaffs_format(const YCHAR *path,
3145 int force_unmount_flag,
3148 return yaffs_format_common(NULL, path, unmount_flag,
3149 force_unmount_flag, remount_flag);
3152 Y_LOFF_T yaffs_freespace_common(struct yaffs_dev *dev, const YCHAR *path)
3154 Y_LOFF_T retVal = -1;
3158 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3159 yaffsfs_SetError(-EFAULT);
3163 if (yaffsfs_CheckPath(path) < 0) {
3164 yaffsfs_SetError(-ENAMETOOLONG);
3171 dev = yaffsfs_FindDevice(path, &dummy);
3172 if (dev && dev->is_mounted) {
3173 retVal = yaffs_get_n_free_chunks(dev);
3174 retVal *= dev->data_bytes_per_chunk;
3177 yaffsfs_SetError(-EINVAL);
3183 Y_LOFF_T yaffs_freespace_reldev(struct yaffs_dev *dev)
3185 return yaffs_freespace_common(dev, NULL);
3188 Y_LOFF_T yaffs_freespace(const YCHAR *path)
3190 return yaffs_freespace_common(NULL, path);
3193 Y_LOFF_T yaffs_totalspace_common(struct yaffs_dev *dev, const YCHAR *path)
3195 Y_LOFF_T retVal = -1;
3199 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3200 yaffsfs_SetError(-EFAULT);
3204 if (yaffsfs_CheckPath(path) < 0) {
3205 yaffsfs_SetError(-ENAMETOOLONG);
3212 dev = yaffsfs_FindDevice(path, &dummy);
3213 if (dev && dev->is_mounted) {
3214 retVal = (dev->param.end_block - dev->param.start_block + 1) -
3215 dev->param.n_reserved_blocks;
3216 retVal *= dev->param.chunks_per_block;
3217 retVal *= dev->data_bytes_per_chunk;
3220 yaffsfs_SetError(-EINVAL);
3226 Y_LOFF_T yaffs_totalspace_reldev(struct yaffs_dev *dev)
3228 return yaffs_totalspace_common(dev, NULL);
3231 Y_LOFF_T yaffs_totalspace(const YCHAR *path)
3233 return yaffs_totalspace_common(NULL, path);
3236 int yaffs_inodecount_common(struct yaffs_dev *dev, const YCHAR *path)
3238 Y_LOFF_T retVal = -1;
3242 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3243 yaffsfs_SetError(-EFAULT);
3247 if (yaffsfs_CheckPath(path) < 0) {
3248 yaffsfs_SetError(-ENAMETOOLONG);
3255 dev = yaffsfs_FindDevice(path, &dummy);
3256 if (dev && dev->is_mounted) {
3257 int n_obj = dev->n_obj;
3258 if (n_obj > dev->n_hardlinks)
3259 retVal = n_obj - dev->n_hardlinks;
3263 yaffsfs_SetError(-EINVAL);
3269 int yaffs_inodecount_reldev(struct yaffs_dev *dev)
3271 return yaffs_inodecount_common(dev, NULL);
3274 int yaffs_inodecount(const YCHAR *path)
3276 return yaffs_inodecount_common(NULL, path);
3279 void yaffs_add_device(struct yaffs_dev *dev)
3281 struct list_head *cfg;
3282 /* First check that the device is not in the list. */
3284 list_for_each(cfg, &yaffsfs_deviceList) {
3285 if (dev == list_entry(cfg, struct yaffs_dev, dev_list))
3289 dev->is_mounted = 0;
3290 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
3292 if (!dev->dev_list.next)
3293 INIT_LIST_HEAD(&dev->dev_list);
3295 list_add(&dev->dev_list, &yaffsfs_deviceList);
3300 void yaffs_remove_device(struct yaffs_dev *dev)
3302 list_del_init(&dev->dev_list);
3305 /* Functions to iterate through devices. NB Use with extreme care! */
3307 static struct list_head *dev_iterator;
3308 void yaffs_dev_rewind(void)
3310 dev_iterator = yaffsfs_deviceList.next;
3313 struct yaffs_dev *yaffs_next_dev(void)
3315 struct yaffs_dev *retval;
3319 if (dev_iterator == &yaffsfs_deviceList)
3322 retval = list_entry(dev_iterator, struct yaffs_dev, dev_list);
3323 dev_iterator = dev_iterator->next;
3327 /* Directory search stuff. */
3329 static struct list_head search_contexts;
3331 static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContext *dsc)
3335 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
3339 if (list_empty(&dsc->dirObj->variant.dir_variant.children))
3340 dsc->nextReturn = NULL;
3343 list_entry(dsc->dirObj->variant.dir_variant.
3344 children.next, struct yaffs_obj,
3347 /* Hey someone isn't playing nice! */
3351 static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContext *dsc)
3355 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
3357 if (dsc->nextReturn == NULL ||
3358 list_empty(&dsc->dirObj->variant.dir_variant.children))
3359 dsc->nextReturn = NULL;
3361 struct list_head *next = dsc->nextReturn->siblings.next;
3363 if (next == &dsc->dirObj->variant.dir_variant.children)
3364 dsc->nextReturn = NULL; /* end of list */
3366 dsc->nextReturn = list_entry(next,
3371 /* Hey someone isn't playing nice! */
3375 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
3378 struct list_head *i;
3379 struct yaffsfs_DirSearchContext *dsc;
3381 /* if search contexts not initilised then skip */
3382 if (!search_contexts.next)
3385 /* Iterate through the directory search contexts.
3386 * If any are the one being removed, then advance the dsc to
3387 * the next one to prevent a hanging ptr.
3389 list_for_each(i, &search_contexts) {
3391 dsc = list_entry(i, struct yaffsfs_DirSearchContext,
3393 if (dsc->nextReturn == obj)
3394 yaffsfs_DirAdvance(dsc);
3400 static yaffs_DIR *yaffsfs_opendir_reldir_no_lock(struct yaffs_obj *reldir,
3401 const YCHAR *dirname)
3403 yaffs_DIR *dir = NULL;
3404 struct yaffs_obj *obj = NULL;
3405 struct yaffsfs_DirSearchContext *dsc = NULL;
3409 if (yaffsfs_CheckMemRegion(dirname, 0, 0) < 0) {
3410 yaffsfs_SetError(-EFAULT);
3414 if (yaffsfs_CheckPath(dirname) < 0) {
3415 yaffsfs_SetError(-ENAMETOOLONG);
3419 obj = yaffsfs_FindObject(reldir, dirname, 0, 1, NULL, ¬Dir, &loop);
3422 yaffsfs_SetError(-ENOTDIR);
3424 yaffsfs_SetError(-ELOOP);
3426 yaffsfs_SetError(-ENOENT);
3427 else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
3428 yaffsfs_SetError(-ENOTDIR);
3432 for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) {
3433 if (!yaffsfs_dsc[i].inUse)
3434 dsc = &yaffsfs_dsc[i];
3437 dir = (yaffs_DIR *) dsc;
3440 memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContext));
3443 yaffs_strncpy(dsc->name, dirname, NAME_MAX);
3444 INIT_LIST_HEAD(&dsc->others);
3446 if (!search_contexts.next)
3447 INIT_LIST_HEAD(&search_contexts);
3449 list_add(&dsc->others, &search_contexts);
3450 yaffsfs_SetDirRewound(dsc);
3456 yaffs_DIR *yaffs_opendir_reldir(struct yaffs_obj *reldir, const YCHAR *dirname)
3461 ret = yaffsfs_opendir_reldir_no_lock(reldir, dirname);
3466 yaffs_DIR *yaffs_opendir_reldev(struct yaffs_dev *dev, const YCHAR *dirname)
3468 return yaffs_opendir_reldir(ROOT_DIR(dev), dirname);
3471 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
3473 return yaffs_opendir_reldir(NULL, dirname);
3476 struct yaffs_dirent *yaffsfs_readdir_no_lock(yaffs_DIR * dirp)
3478 struct yaffsfs_DirSearchContext *dsc;
3479 struct yaffs_dirent *retVal = NULL;
3481 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3484 if (dsc && dsc->inUse) {
3485 yaffsfs_SetError(0);
3486 if (dsc->nextReturn) {
3488 yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
3489 dsc->de.d_dont_use = dsc->nextReturn;
3490 dsc->de.d_off = dsc->offset++;
3491 yaffs_get_obj_name(dsc->nextReturn,
3492 dsc->de.d_name, NAME_MAX);
3493 if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) {
3494 /* this should not happen! */
3495 yaffs_strcpy(dsc->de.d_name, _Y("zz"));
3497 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
3499 yaffsfs_DirAdvance(dsc);
3503 yaffsfs_SetError(-EBADF);
3508 struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp)
3510 struct yaffs_dirent *ret;
3513 ret = yaffsfs_readdir_no_lock(dirp);
3518 static void yaffsfs_rewinddir_no_lock(yaffs_DIR *dirp)
3520 struct yaffsfs_DirSearchContext *dsc;
3522 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3524 if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0)
3527 yaffsfs_SetDirRewound(dsc);
3531 void yaffs_rewinddir(yaffs_DIR *dirp)
3534 yaffsfs_rewinddir_no_lock(dirp);
3538 struct yaffs_dirent *yaffs_readdir_fd(int fd)
3540 struct yaffs_dirent *ret = NULL;
3541 struct yaffsfs_FileDes *f;
3544 f = yaffsfs_HandleToFileDes(fd);
3546 ret = yaffsfs_readdir_no_lock(f->v.dir);
3551 void yaffs_rewinddir_fd(int fd)
3553 struct yaffsfs_FileDes *f;
3556 f = yaffsfs_HandleToFileDes(fd);
3558 yaffsfs_rewinddir_no_lock(f->v.dir);
3563 static int yaffsfs_closedir_no_lock(yaffs_DIR *dirp)
3565 struct yaffsfs_DirSearchContext *dsc;
3567 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3569 if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0) {
3570 yaffsfs_SetError(-EFAULT);
3575 list_del(&dsc->others); /* unhook from list */
3579 int yaffs_closedir(yaffs_DIR *dirp)
3584 ret = yaffsfs_closedir_no_lock(dirp);
3589 /* End of directory stuff */
3591 int yaffs_symlink_reldir(struct yaffs_obj *reldir,
3592 const YCHAR *oldpath, const YCHAR *newpath)
3594 struct yaffs_obj *parent = NULL;
3595 struct yaffs_obj *obj;
3598 int mode = 0; /* ignore for now */
3602 if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
3603 yaffsfs_CheckMemRegion(newpath, 0, 0) < 0) {
3604 yaffsfs_SetError(-EFAULT);
3608 if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3609 yaffsfs_SetError(-ENAMETOOLONG);
3614 parent = yaffsfs_FindDirectory(reldir, newpath, &name, 0, ¬Dir, &loop);
3615 if (!parent && notDir)
3616 yaffsfs_SetError(-ENOTDIR);
3618 yaffsfs_SetError(-ELOOP);
3619 else if (!parent || yaffs_strnlen(name, 5) < 1)
3620 yaffsfs_SetError(-ENOENT);
3621 else if (yaffsfs_TooManyObjects(parent->my_dev))
3622 yaffsfs_SetError(-ENFILE);
3623 else if (parent->my_dev->read_only)
3624 yaffsfs_SetError(-EROFS);
3626 obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath);
3629 else if (yaffsfs_FindObject(reldir, newpath, 0, 0,
3631 yaffsfs_SetError(-EEXIST);
3633 yaffsfs_SetError(-ENOSPC);
3641 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
3643 return yaffs_symlink_reldir(NULL, oldpath, newpath);
3646 int yaffs_readlink_reldir(struct yaffs_obj *reldir,const YCHAR *path,
3647 YCHAR *buf, int bufsiz)
3649 struct yaffs_obj *obj = NULL;
3650 struct yaffs_obj *dir = NULL;
3655 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
3656 yaffsfs_CheckMemRegion(buf, bufsiz, 1) < 0) {
3657 yaffsfs_SetError(-EFAULT);
3663 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
3666 yaffsfs_SetError(-ENOTDIR);
3668 yaffsfs_SetError(-ELOOP);
3669 else if (!dir || !obj)
3670 yaffsfs_SetError(-ENOENT);
3671 else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
3672 yaffsfs_SetError(-EINVAL);
3674 YCHAR *alias = obj->variant.symlink_variant.alias;
3675 memset(buf, 0, bufsiz);
3676 yaffs_strncpy(buf, alias, bufsiz - 1);
3682 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
3684 return yaffs_readlink_reldir(NULL, path, buf, bufsiz);
3687 int yaffs_link_reldir(struct yaffs_obj *reldir,
3688 const YCHAR *oldpath, const YCHAR *linkpath)
3690 /* Creates a link called newpath to existing oldpath */
3691 struct yaffs_obj *obj = NULL;
3692 struct yaffs_obj *lnk = NULL;
3693 struct yaffs_obj *obj_dir = NULL;
3694 struct yaffs_obj *lnk_dir = NULL;
3702 if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
3703 yaffsfs_CheckMemRegion(linkpath, 0, 0) < 0) {
3704 yaffsfs_SetError(-EFAULT);
3708 if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3709 yaffsfs_SetError(-ENAMETOOLONG);
3715 obj = yaffsfs_FindObject(reldir, oldpath, 0, 1,
3716 &obj_dir, ¬DirObj, &objLoop);
3717 lnk = yaffsfs_FindObject(reldir, linkpath, 0, 0, NULL, NULL, NULL);
3718 lnk_dir = yaffsfs_FindDirectory(reldir, linkpath, &newname,
3719 0, ¬DirLnk, &lnkLoop);
3721 if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
3722 yaffsfs_SetError(-ENOTDIR);
3723 else if (objLoop || lnkLoop)
3724 yaffsfs_SetError(-ELOOP);
3725 else if (!obj_dir || !lnk_dir || !obj)
3726 yaffsfs_SetError(-ENOENT);
3727 else if (obj->my_dev->read_only)
3728 yaffsfs_SetError(-EROFS);
3729 else if (yaffsfs_TooManyObjects(obj->my_dev))
3730 yaffsfs_SetError(-ENFILE);
3732 yaffsfs_SetError(-EEXIST);
3733 else if (lnk_dir->my_dev != obj->my_dev)
3734 yaffsfs_SetError(-EXDEV);
3736 retVal = yaffsfs_CheckNameLength(newname);
3739 lnk = yaffs_link_obj(lnk_dir, newname, obj);
3743 yaffsfs_SetError(-ENOSPC);
3752 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
3754 return yaffs_link_reldir(NULL, oldpath, linkpath);
3757 int yaffs_mknod_reldir(struct yaffs_obj *reldir, const YCHAR *pathname,
3758 mode_t mode, dev_t dev_val)
3765 yaffsfs_SetError(-EINVAL);
3769 int yaffs_mknod_reldev(struct yaffs_dev *dev, const YCHAR *pathname, mode_t mode, dev_t dev_val)
3771 return yaffs_mknod_reldir(ROOT_DIR(dev), pathname, mode, dev_val);
3774 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev_val)
3776 return yaffs_mknod_reldir(NULL, pathname, mode, dev_val);
3780 * D E B U G F U N C T I O N S
3785 * Returns number of handles attached to the object
3787 int yaffs_n_handles_reldir(struct yaffs_obj *reldir, const YCHAR *path)
3789 struct yaffs_obj *obj;
3791 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3792 yaffsfs_SetError(-EFAULT);
3796 if (yaffsfs_CheckPath(path) < 0) {
3797 yaffsfs_SetError(-ENAMETOOLONG);
3801 obj = yaffsfs_FindObject(reldir, path, 0, 1, NULL, NULL, NULL);
3804 return yaffsfs_CountHandles(obj);
3809 int yaffs_n_handles(const YCHAR *path)
3811 return yaffs_n_handles_reldir(NULL, path);
3814 int yaffs_get_error(void)
3816 return yaffsfs_GetLastError();
3819 int yaffs_set_error(int error)
3821 yaffsfs_SetError(error);
3825 int yaffs_dump_dev_reldir(struct yaffs_obj *reldir, const YCHAR *path)
3835 reldir = yaffsfs_FindRoot(path, &rest);
3838 struct yaffs_dev *dev = reldir->my_dev;
3841 "n_page_writes.......... %d\n"
3842 "n_page_reads........... %d\n"
3843 "n_erasures....... %d\n"
3844 "n_gc_copies............ %d\n"
3845 "garbageCollections... %d\n"
3846 "passiveGarbageColl'ns %d\n"
3852 dev->garbageCollections, dev->passiveGarbageCollections);
3859 int yaffs_dump_dev(const YCHAR *path)
3861 return yaffs_dump_dev_reldir(NULL, path);