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 unsigned 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 int 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;
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);
1164 } else if (nbyte > YAFFS_MAX_FILE_SIZE) {
1165 yaffsfs_SetError(-EINVAL);
1171 startPos = fd->v.position;
1175 if (yaffs_get_obj_length(obj) > pos)
1176 maxRead = yaffs_get_obj_length(obj) - pos;
1180 if (nbyte > maxRead)
1183 yaffsfs_GetHandle(handle);
1185 endPos = pos + nbyte;
1187 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1188 nbyte > YAFFS_MAX_FILE_SIZE ||
1189 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1195 nToRead = YAFFSFS_RW_SIZE -
1196 (pos & (YAFFSFS_RW_SIZE - 1));
1197 if (nToRead > nbyte)
1201 * Need to reverify object in case the device was
1202 * unmounted in another thread.
1204 obj = yaffsfs_HandleToObject(handle);
1208 nRead = yaffs_file_rd(obj, buf, pos, nToRead);
1216 if (nRead == nToRead)
1219 nbyte = 0; /* no more to read */
1228 yaffsfs_PutHandle(handle);
1232 fd->v.position = startPos + totalRead;
1234 yaffsfs_SetError(-EINVAL);
1241 return (totalRead >= 0) ? totalRead : -1;
1245 int yaffs_read(int handle, void *buf, unsigned int nbyte)
1247 return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
1250 int yaffs_pread(int handle, void *buf, unsigned int nbyte, Y_LOFF_T offset)
1252 return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
1255 static int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
1256 int isPwrite, Y_LOFF_T offset)
1258 struct yaffsfs_FileDes *fd = NULL;
1259 struct yaffs_obj *obj = NULL;
1261 Y_LOFF_T startPos = 0;
1264 int totalWritten = 0;
1265 int write_trhrough = 0;
1267 const u8 *buf = (const u8 *)vbuf;
1269 if (yaffsfs_CheckMemRegion(vbuf, nbyte, 0) < 0) {
1270 yaffsfs_SetError(-EFAULT);
1275 fd = yaffsfs_HandleToFileDes(handle);
1276 obj = yaffsfs_HandleToObject(handle);
1280 yaffsfs_SetError(-EBADF);
1282 } else if (!fd->writing) {
1283 yaffsfs_SetError(-EINVAL);
1285 } else if (obj->my_dev->read_only) {
1286 yaffsfs_SetError(-EROFS);
1290 startPos = yaffs_get_obj_length(obj);
1294 startPos = fd->v.position;
1296 yaffsfs_GetHandle(handle);
1298 endPos = pos + nbyte;
1300 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1301 nbyte > YAFFS_MAX_FILE_SIZE ||
1302 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1309 nToWrite = YAFFSFS_RW_SIZE -
1310 (pos & (YAFFSFS_RW_SIZE - 1));
1311 if (nToWrite > nbyte)
1315 * Need to reverify object in case the device was
1316 * remounted or unmounted in another thread.
1318 obj = yaffsfs_HandleToObject(handle);
1319 if (!obj || obj->my_dev->read_only)
1323 yaffs_wr_file(obj, buf, pos, nToWrite,
1326 totalWritten += nWritten;
1331 if (nWritten == nToWrite)
1336 if (nWritten < 1 && totalWritten < 1) {
1337 yaffsfs_SetError(-ENOSPC);
1347 yaffsfs_PutHandle(handle);
1350 if (totalWritten > 0)
1351 fd->v.position = startPos + totalWritten;
1353 yaffsfs_SetError(-EINVAL);
1359 return (totalWritten >= 0) ? totalWritten : -1;
1362 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1364 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1367 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, Y_LOFF_T offset)
1369 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1372 int yaffs_truncate_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1375 struct yaffs_obj *obj = NULL;
1376 struct yaffs_obj *dir = NULL;
1377 int result = YAFFS_FAIL;
1381 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
1382 yaffsfs_SetError(-EFAULT);
1386 if (yaffsfs_CheckPath(path) < 0) {
1387 yaffsfs_SetError(-ENAMETOOLONG);
1393 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1394 obj = yaffsfs_FollowLink(obj, 0, &loop);
1397 yaffsfs_SetError(-ENOTDIR);
1399 yaffsfs_SetError(-ELOOP);
1400 else if (!dir || !obj)
1401 yaffsfs_SetError(-ENOENT);
1402 else if (obj->my_dev->read_only)
1403 yaffsfs_SetError(-EROFS);
1404 else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1405 yaffsfs_SetError(-EISDIR);
1406 else if (obj->my_dev->read_only)
1407 yaffsfs_SetError(-EROFS);
1408 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1409 yaffsfs_SetError(-EINVAL);
1411 result = yaffs_resize_file(obj, new_size);
1415 return (result) ? 0 : -1;
1418 int yaffs_truncate_reldev(struct yaffs_dev *dev, const YCHAR *path,
1421 return yaffs_truncate_reldir(ROOT_DIR(dev), path, new_size);
1424 int yaffs_truncate(const YCHAR *path, Y_LOFF_T new_size)
1426 return yaffs_truncate_reldir(NULL, path, new_size);
1429 int yaffs_ftruncate(int handle, Y_LOFF_T new_size)
1431 struct yaffsfs_FileDes *fd = NULL;
1432 struct yaffs_obj *obj = NULL;
1436 fd = yaffsfs_HandleToFileDes(handle);
1437 obj = yaffsfs_HandleToObject(handle);
1441 yaffsfs_SetError(-EBADF);
1442 else if (!fd->writing)
1443 yaffsfs_SetError(-EINVAL);
1444 else if (obj->my_dev->read_only)
1445 yaffsfs_SetError(-EROFS);
1446 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1447 yaffsfs_SetError(-EINVAL);
1449 /* resize the file */
1450 result = yaffs_resize_file(obj, new_size);
1453 return (result) ? 0 : -1;
1457 Y_LOFF_T yaffs_lseek(int handle, Y_LOFF_T offset, int whence)
1459 struct yaffsfs_FileDes *fd = NULL;
1460 struct yaffs_obj *obj = NULL;
1462 Y_LOFF_T fSize = -1;
1465 fd = yaffsfs_HandleToFileDes(handle);
1466 obj = yaffsfs_HandleToObject(handle);
1469 yaffsfs_SetError(-EBADF);
1470 else if (offset > YAFFS_MAX_FILE_SIZE)
1471 yaffsfs_SetError(-EINVAL);
1473 if (whence == SEEK_SET) {
1476 } else if (whence == SEEK_CUR) {
1477 if ((fd->v.position + offset) >= 0)
1478 pos = (fd->v.position + offset);
1479 } else if (whence == SEEK_END) {
1480 fSize = yaffs_get_obj_length(obj);
1481 if (fSize >= 0 && (fSize + offset) >= 0)
1482 pos = fSize + offset;
1485 if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1486 fd->v.position = pos;
1488 yaffsfs_SetError(-EINVAL);
1498 static int yaffsfs_DoUnlink_reldir(struct yaffs_obj *reldir,
1499 const YCHAR *path, int isDirectory)
1501 struct yaffs_obj *dir = NULL;
1502 struct yaffs_obj *obj = NULL;
1504 int result = YAFFS_FAIL;
1508 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
1509 yaffsfs_SetError(-EFAULT);
1513 if (yaffsfs_CheckPath(path) < 0) {
1514 yaffsfs_SetError(-ENAMETOOLONG);
1520 obj = yaffsfs_FindObject(reldir, path, 0, 0, NULL, NULL, NULL);
1521 dir = yaffsfs_FindDirectory(reldir, path, &name, 0, ¬Dir, &loop);
1524 yaffsfs_SetError(-ENOTDIR);
1526 yaffsfs_SetError(-ELOOP);
1528 yaffsfs_SetError(-ENOENT);
1529 else if (yaffs_strncmp(name, _Y("."), 2) == 0)
1530 yaffsfs_SetError(-EINVAL);
1532 yaffsfs_SetError(-ENOENT);
1533 else if (obj->my_dev->read_only)
1534 yaffsfs_SetError(-EROFS);
1535 else if (!isDirectory &&
1536 obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1537 yaffsfs_SetError(-EISDIR);
1538 else if (isDirectory &&
1539 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1540 yaffsfs_SetError(-ENOTDIR);
1541 else if (isDirectory && obj == obj->my_dev->root_dir)
1542 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1544 result = yaffs_unlinker(dir, name);
1546 if (result == YAFFS_FAIL && isDirectory)
1547 yaffsfs_SetError(-ENOTEMPTY);
1552 return (result == YAFFS_FAIL) ? -1 : 0;
1555 int yaffs_unlink_reldir(struct yaffs_obj *reldir, const YCHAR *path)
1557 return yaffsfs_DoUnlink_reldir(reldir, path, 0);
1560 int yaffs_unlink_reldev(struct yaffs_dev *dev, const YCHAR *path)
1562 return yaffsfs_DoUnlink_reldir(ROOT_DIR(dev), path, 0);
1565 int yaffs_unlink(const YCHAR *path)
1567 return yaffs_unlink_reldir(NULL, path);
1570 static int rename_file_over_dir(struct yaffs_obj *obj, struct yaffs_obj *newobj)
1572 if (obj && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY &&
1573 newobj && newobj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1579 static int rename_dir_over_file(struct yaffs_obj *obj, struct yaffs_obj *newobj)
1581 if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY &&
1582 newobj && newobj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1588 int yaffs_rename_reldir(struct yaffs_obj *reldir,
1589 const YCHAR *oldPath, const YCHAR *newPath)
1591 struct yaffs_obj *olddir = NULL;
1592 struct yaffs_obj *newdir = NULL;
1593 struct yaffs_obj *obj = NULL;
1594 struct yaffs_obj *newobj = NULL;
1597 int result = YAFFS_FAIL;
1598 int rename_allowed = 1;
1604 YCHAR *alt_newpath = NULL;
1606 if (yaffsfs_CheckMemRegion(oldPath, 0, 0) < 0 ||
1607 yaffsfs_CheckMemRegion(newPath, 0, 0) < 0) {
1608 yaffsfs_SetError(-EFAULT);
1612 if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) {
1613 yaffsfs_SetError(-ENAMETOOLONG);
1617 if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) {
1618 yaffsfs_SetError(-ENOMEM);
1622 newPath = alt_newpath;
1626 olddir = yaffsfs_FindDirectory(reldir, oldPath, &oldname, 0,
1627 ¬OldDir, &oldLoop);
1628 newdir = yaffsfs_FindDirectory(reldir, newPath, &newname, 0,
1629 ¬NewDir, &newLoop);
1630 obj = yaffsfs_FindObject(reldir, oldPath, 0, 0, NULL, NULL, NULL);
1631 newobj = yaffsfs_FindObject(reldir, newPath, 0, 0, NULL, NULL, NULL);
1633 /* If the object being renamed is a directory and the
1634 * path ended with a "/" then the olddir == obj.
1635 * We pass through NULL for the old name to tell the lower layers
1636 * to use olddir as the object.
1642 if ((!olddir && notOldDir) || (!newdir && notNewDir)) {
1643 yaffsfs_SetError(-ENOTDIR);
1645 } else if (oldLoop || newLoop) {
1646 yaffsfs_SetError(-ELOOP);
1648 } else if (olddir && oldname &&
1649 yaffs_strncmp(oldname, _Y("."), 2) == 0) {
1650 yaffsfs_SetError(-EINVAL);
1652 } else if (!olddir || !newdir || !obj) {
1653 yaffsfs_SetError(-ENOENT);
1655 } else if (obj->my_dev->read_only) {
1656 yaffsfs_SetError(-EROFS);
1658 } else if (rename_file_over_dir(obj, newobj)) {
1659 yaffsfs_SetError(-EISDIR);
1661 } else if (rename_dir_over_file(obj, newobj)) {
1662 yaffsfs_SetError(-ENOTDIR);
1664 } else if (yaffs_is_non_empty_dir(newobj)) {
1665 yaffsfs_SetError(-ENOTEMPTY);
1667 } else if (olddir->my_dev != newdir->my_dev) {
1668 /* Rename must be on same device */
1669 yaffsfs_SetError(-EXDEV);
1671 } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1673 * It is a directory, check that it is not being renamed to
1674 * being its own decendent.
1675 * Do this by tracing from the new directory back to the root,
1679 struct yaffs_obj *xx = newdir;
1681 while (rename_allowed && xx) {
1686 if (!rename_allowed)
1687 yaffsfs_SetError(-EINVAL);
1691 result = yaffs_rename_obj(olddir, oldname, newdir, newname);
1697 return (result == YAFFS_FAIL) ? -1 : 0;
1700 int yaffs_rename_reldev(struct yaffs_dev *dev, const YCHAR *oldPath,
1701 const YCHAR *newPath)
1703 return yaffs_rename_reldir(ROOT_DIR(dev), oldPath, newPath);
1705 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1707 return yaffs_rename_reldir(NULL, oldPath, newPath);
1710 static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf)
1714 obj = yaffs_get_equivalent_obj(obj);
1717 buf->st_dev = (int)obj->my_dev->os_context;
1718 buf->st_ino = obj->obj_id;
1719 buf->st_mode = obj->yst_mode & ~S_IFMT;
1721 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1722 buf->st_mode |= S_IFDIR;
1723 else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1724 buf->st_mode |= S_IFLNK;
1725 else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1726 buf->st_mode |= S_IFREG;
1728 buf->st_nlink = yaffs_get_obj_link_count(obj);
1731 buf->st_rdev = obj->yst_rdev;
1732 buf->st_size = yaffs_get_obj_length(obj);
1733 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1734 buf->st_blocks = (buf->st_size + buf->st_blksize - 1) /
1736 #if CONFIG_YAFFS_WINCE
1737 buf->yst_wince_atime[0] = obj->win_atime[0];
1738 buf->yst_wince_atime[1] = obj->win_atime[1];
1739 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1740 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1741 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1742 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1744 buf->yst_atime = obj->yst_atime;
1745 buf->yst_ctime = obj->yst_ctime;
1746 buf->yst_mtime = obj->yst_mtime;
1753 static int yaffsfs_DoStatOrLStat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1754 struct yaffs_stat *buf, int doLStat)
1756 struct yaffs_obj *obj = NULL;
1757 struct yaffs_obj *dir = NULL;
1762 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
1763 yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
1764 yaffsfs_SetError(-EFAULT);
1768 if (yaffsfs_CheckPath(path) < 0) {
1769 yaffsfs_SetError(-ENAMETOOLONG);
1775 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1777 if (!doLStat && obj)
1778 obj = yaffsfs_FollowLink(obj, 0, &loop);
1781 yaffsfs_SetError(-ENOTDIR);
1783 yaffsfs_SetError(-ELOOP);
1784 else if (!dir || !obj)
1785 yaffsfs_SetError(-ENOENT);
1787 retVal = yaffsfs_DoStat(obj, buf);
1795 int yaffs_stat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1796 struct yaffs_stat *buf)
1798 return yaffsfs_DoStatOrLStat_reldir(reldir, path, buf, 0);
1801 int yaffs_lstat_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1802 struct yaffs_stat *buf)
1804 return yaffsfs_DoStatOrLStat_reldir(reldir, path, buf, 1);
1807 int yaffs_stat_reldev(struct yaffs_dev *dev, const YCHAR *path,
1808 struct yaffs_stat *buf)
1810 return yaffsfs_DoStatOrLStat_reldir(ROOT_DIR(dev), path, buf, 0);
1813 int yaffs_lstat_reldev(struct yaffs_dev *dev, const YCHAR *path,
1814 struct yaffs_stat *buf)
1816 return yaffsfs_DoStatOrLStat_reldir(ROOT_DIR(dev), path, buf, 1);
1819 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1821 return yaffs_stat_reldir(NULL, path, buf);
1824 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1826 return yaffs_lstat_reldir(NULL, path, buf);
1829 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1831 struct yaffs_obj *obj;
1835 if (yaffsfs_CheckMemRegion(buf, sizeof(*buf), 1) < 0) {
1836 yaffsfs_SetError(-EFAULT);
1841 obj = yaffsfs_HandleToObject(fd);
1844 retVal = yaffsfs_DoStat(obj, buf);
1847 yaffsfs_SetError(-EBADF);
1854 static int yaffsfs_DoUtime(struct yaffs_obj *obj,
1855 const struct yaffs_utimbuf *buf)
1859 obj = yaffs_get_equivalent_obj(obj);
1861 if (obj && obj->my_dev->read_only) {
1862 yaffsfs_SetError(-EROFS);
1866 #if !CONFIG_YAFFS_WINCE
1868 struct yaffs_utimbuf local;
1871 local.actime = Y_CURRENT_TIME;
1872 local.modtime = local.actime;
1879 obj->yst_atime = buf->actime;
1880 obj->yst_mtime = buf->modtime;
1882 result = yaffs_flush_file(obj, 0, 0, 0);
1883 retVal = result == YAFFS_OK ? 0 : -1;
1891 int yaffs_utime_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1892 const struct yaffs_utimbuf *buf)
1894 struct yaffs_obj *obj = NULL;
1895 struct yaffs_obj *dir = NULL;
1901 yaffsfs_SetError(-EFAULT);
1905 if (yaffsfs_CheckPath(path) < 0) {
1906 yaffsfs_SetError(-ENAMETOOLONG);
1912 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1915 yaffsfs_SetError(-ENOTDIR);
1917 yaffsfs_SetError(-ELOOP);
1918 else if (!dir || !obj)
1919 yaffsfs_SetError(-ENOENT);
1921 retVal = yaffsfs_DoUtime(obj, buf);
1929 int yaffs_utime_reldev(struct yaffs_dev *dev, const YCHAR *path,
1930 const struct yaffs_utimbuf *buf)
1932 return yaffs_utime_reldir(ROOT_DIR(dev), path, buf);
1935 int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf)
1937 return yaffs_utime_reldir(NULL, path, buf);
1940 int yaffs_futime(int fd, const struct yaffs_utimbuf *buf)
1942 struct yaffs_obj *obj;
1947 obj = yaffsfs_HandleToObject(fd);
1950 retVal = yaffsfs_DoUtime(obj, buf);
1953 yaffsfs_SetError(-EBADF);
1960 #ifndef CONFIG_YAFFS_WINCE
1961 /* xattrib functions */
1963 static int yaffs_do_setxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
1964 const char *name, const void *data, int size,
1965 int flags, int follow)
1967 struct yaffs_obj *obj;
1968 struct yaffs_obj *dir;
1974 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
1975 yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
1976 yaffsfs_CheckMemRegion(data, size, 0) < 0) {
1977 yaffsfs_SetError(-EFAULT);
1981 if (yaffsfs_CheckPath(path) < 0) {
1982 yaffsfs_SetError(-ENAMETOOLONG);
1988 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
1991 obj = yaffsfs_FollowLink(obj, 0, &loop);
1994 yaffsfs_SetError(-ENOTDIR);
1996 yaffsfs_SetError(-ELOOP);
1997 else if (!dir || !obj)
1998 yaffsfs_SetError(-ENOENT);
2000 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
2002 yaffsfs_SetError(retVal);
2013 int yaffs_setxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2014 const char *name, const void *data, int size, int flags)
2016 return yaffs_do_setxattr_reldir(reldir, path, name, data, size, flags, 1);
2019 int yaffs_setxattr_reldev(struct yaffs_dev *dev, const YCHAR *path,
2020 const char *name, const void *data, int size, int flags)
2022 return yaffs_setxattr_reldir(ROOT_DIR(dev), path, name, data, size, flags);
2025 int yaffs_setxattr(const YCHAR *path, const char *name,
2026 const void *data, int size, int flags)
2028 return yaffs_setxattr_reldir(NULL, path, name, data, size, flags);
2031 int yaffs_lsetxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path, const char *name,
2032 const void *data, int size, int flags)
2034 return yaffs_do_setxattr_reldir(reldir, path, name, data, size, flags, 0);
2037 int yaffs_lsetxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name,
2038 const void *data, int size, int flags)
2040 return yaffs_lsetxattr_reldir(ROOT_DIR(dev), path, name, data, size, flags);
2043 int yaffs_lsetxattr(const YCHAR *path, const char *name,
2044 const void *data, int size, int flags)
2046 return yaffs_lsetxattr_reldir(NULL, path, name, data, size, flags);
2049 int yaffs_fsetxattr(int fd, const char *name,
2050 const void *data, int size, int flags)
2052 struct yaffs_obj *obj;
2056 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2057 yaffsfs_CheckMemRegion(data, size, 0) < 0) {
2058 yaffsfs_SetError(-EFAULT);
2063 obj = yaffsfs_HandleToObject(fd);
2066 yaffsfs_SetError(-EBADF);
2068 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
2070 yaffsfs_SetError(retVal);
2080 static int yaffs_do_getxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2081 const char *name, void *data, int size, int follow)
2083 struct yaffs_obj *obj;
2084 struct yaffs_obj *dir;
2089 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2090 yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2091 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2092 yaffsfs_SetError(-EFAULT);
2096 if (yaffsfs_CheckPath(path) < 0) {
2097 yaffsfs_SetError(-ENAMETOOLONG);
2103 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2106 obj = yaffsfs_FollowLink(obj, 0, &loop);
2109 yaffsfs_SetError(-ENOTDIR);
2111 yaffsfs_SetError(-ELOOP);
2112 else if (!dir || !obj)
2113 yaffsfs_SetError(-ENOENT);
2115 retVal = yaffs_get_xattrib(obj, name, data, size);
2117 yaffsfs_SetError(retVal);
2127 int yaffs_getxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2128 const char *name, void *data, int size)
2130 return yaffs_do_getxattr_reldir(reldir, path, name, data, size, 1);
2133 int yaffs_getxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name, void *data, int size)
2135 return yaffs_getxattr_reldir(ROOT_DIR(dev), path, name, data, size);
2138 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
2140 return yaffs_getxattr_reldir(NULL, path, name, data, size);
2143 int yaffs_lgetxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2144 const char *name, void *data, int size)
2146 return yaffs_do_getxattr_reldir(reldir, path, name, data, size, 0);
2149 int yaffs_lgetxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name, void *data, int size)
2151 return yaffs_lgetxattr_reldir(ROOT_DIR(dev), path, name, data, size);
2154 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
2156 return yaffs_lgetxattr_reldir(NULL, path, name, data, size);
2159 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
2161 struct yaffs_obj *obj;
2165 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0 ||
2166 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2167 yaffsfs_SetError(-EFAULT);
2172 obj = yaffsfs_HandleToObject(fd);
2175 retVal = yaffs_get_xattrib(obj, name, data, size);
2177 yaffsfs_SetError(retVal);
2182 yaffsfs_SetError(-EBADF);
2189 static int yaffs_do_listxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2190 char *data, int size, int follow)
2192 struct yaffs_obj *obj = NULL;
2193 struct yaffs_obj *dir = NULL;
2198 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2199 yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2200 yaffsfs_SetError(-EFAULT);
2204 if (yaffsfs_CheckPath(path) < 0) {
2205 yaffsfs_SetError(-ENAMETOOLONG);
2211 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2214 obj = yaffsfs_FollowLink(obj, 0, &loop);
2217 yaffsfs_SetError(-ENOTDIR);
2219 yaffsfs_SetError(-ELOOP);
2220 else if (!dir || !obj)
2221 yaffsfs_SetError(-ENOENT);
2223 retVal = yaffs_list_xattrib(obj, data, size);
2225 yaffsfs_SetError(retVal);
2236 int yaffs_listxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2237 char *data, int size)
2239 return yaffs_do_listxattr_reldir(reldir, path, data, size, 1);
2242 int yaffs_listxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, char *data, int size)
2244 return yaffs_listxattr_reldir(ROOT_DIR(dev), path, data, size);
2247 int yaffs_listxattr(const YCHAR *path, char *data, int size)
2249 return yaffs_listxattr_reldir(NULL, path, data, size);
2252 int yaffs_llistxattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2253 char *data, int size)
2255 return yaffs_do_listxattr_reldir(reldir, path, data, size, 0);
2258 int yaffs_llistxattr_reldev(struct yaffs_dev *dev, const YCHAR *path, char *data, int size)
2260 return yaffs_llistxattr_reldir(ROOT_DIR(dev), path, data, size);
2263 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
2265 return yaffs_llistxattr_reldir(NULL, path, data, size);
2268 int yaffs_flistxattr(int fd, char *data, int size)
2270 struct yaffs_obj *obj;
2274 if (yaffsfs_CheckMemRegion(data, size, 1) < 0) {
2275 yaffsfs_SetError(-EFAULT);
2280 obj = yaffsfs_HandleToObject(fd);
2283 retVal = yaffs_list_xattrib(obj, data, size);
2285 yaffsfs_SetError(retVal);
2290 yaffsfs_SetError(-EBADF);
2297 static int yaffs_do_removexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2298 const char *name, int follow)
2300 struct yaffs_obj *obj = NULL;
2301 struct yaffs_obj *dir = NULL;
2306 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
2307 yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
2308 yaffsfs_SetError(-EFAULT);
2312 if (yaffsfs_CheckPath(path) < 0) {
2313 yaffsfs_SetError(-ENAMETOOLONG);
2319 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2322 obj = yaffsfs_FollowLink(obj, 0, &loop);
2325 yaffsfs_SetError(-ENOTDIR);
2327 yaffsfs_SetError(-ELOOP);
2328 else if (!dir || !obj)
2329 yaffsfs_SetError(-ENOENT);
2331 retVal = yaffs_remove_xattrib(obj, name);
2333 yaffsfs_SetError(retVal);
2344 int yaffs_removexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2347 return yaffs_do_removexattr_reldir(reldir, path, name, 1);
2350 int yaffs_removexattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name)
2352 return yaffs_removexattr_reldir(ROOT_DIR(dev), path, name);
2355 int yaffs_removexattr(const YCHAR *path, const char *name)
2357 return yaffs_removexattr_reldir(NULL, path, name);
2360 int yaffs_lremovexattr_reldir(struct yaffs_obj *reldir, const YCHAR *path,
2363 return yaffs_do_removexattr_reldir(reldir, path, name, 0);
2366 int yaffs_lremovexattr_reldev(struct yaffs_dev *dev, const YCHAR *path, const char *name)
2368 return yaffs_lremovexattr_reldir(ROOT_DIR(dev), path, name);
2371 int yaffs_lremovexattr(const YCHAR *path, const char *name)
2373 return yaffs_lremovexattr_reldir(NULL, path, name);
2376 int yaffs_fremovexattr(int fd, const char *name)
2378 struct yaffs_obj *obj;
2382 if (yaffsfs_CheckMemRegion(name, 0, 0) < 0) {
2383 yaffsfs_SetError(-EFAULT);
2388 obj = yaffsfs_HandleToObject(fd);
2391 retVal = yaffs_remove_xattrib(obj, name);
2393 yaffsfs_SetError(retVal);
2398 yaffsfs_SetError(-EBADF);
2406 #ifdef CONFIG_YAFFS_WINCE
2407 int yaffs_get_wince_times(int fd, unsigned *wctime,
2408 unsigned *watime, unsigned *wmtime)
2410 struct yaffs_obj *obj;
2415 obj = yaffsfs_HandleToObject(fd);
2420 wctime[0] = obj->win_ctime[0];
2421 wctime[1] = obj->win_ctime[1];
2424 watime[0] = obj->win_atime[0];
2425 watime[1] = obj->win_atime[1];
2428 wmtime[0] = obj->win_mtime[0];
2429 wmtime[1] = obj->win_mtime[1];
2435 yaffsfs_SetError(-EBADF);
2442 int yaffs_set_wince_times(int fd,
2443 const unsigned *wctime,
2444 const unsigned *watime, const unsigned *wmtime)
2446 struct yaffs_obj *obj;
2451 obj = yaffsfs_HandleToObject(fd);
2456 obj->win_ctime[0] = wctime[0];
2457 obj->win_ctime[1] = wctime[1];
2460 obj->win_atime[0] = watime[0];
2461 obj->win_atime[1] = watime[1];
2464 obj->win_mtime[0] = wmtime[0];
2465 obj->win_mtime[1] = wmtime[1];
2469 result = yaffs_flush_file(obj, 0, 0, 0);
2473 yaffsfs_SetError(-EBADF);
2482 static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode)
2487 obj = yaffs_get_equivalent_obj(obj);
2490 obj->yst_mode = mode;
2492 result = yaffs_flush_file(obj, 0, 0, 0);
2495 return result == YAFFS_OK ? 0 : -1;
2498 int yaffs_access_reldir(struct yaffs_obj *reldir, const YCHAR *path, int amode)
2500 struct yaffs_obj *obj = NULL;
2501 struct yaffs_obj *dir = NULL;
2506 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2507 yaffsfs_SetError(-EFAULT);
2511 if (yaffsfs_CheckPath(path) < 0) {
2512 yaffsfs_SetError(-ENAMETOOLONG);
2516 if (amode & ~(R_OK | W_OK | X_OK)) {
2517 yaffsfs_SetError(-EINVAL);
2523 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2524 obj = yaffsfs_FollowLink(obj, 0, &loop);
2527 yaffsfs_SetError(-ENOTDIR);
2529 yaffsfs_SetError(-ELOOP);
2530 else if (!dir || !obj)
2531 yaffsfs_SetError(-ENOENT);
2532 else if ((amode & W_OK) && obj->my_dev->read_only)
2533 yaffsfs_SetError(-EROFS);
2537 if ((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2539 if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2541 if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2545 yaffsfs_SetError(-EACCES);
2556 int yaffs_access_reldev(struct yaffs_dev *dev, const YCHAR *path, int amode)
2558 return yaffs_access_reldir(ROOT_DIR(dev), path, amode);
2561 int yaffs_access(const YCHAR *path, int amode)
2563 return yaffs_access_reldir(NULL, path, amode);
2566 int yaffs_chmod_reldir(struct yaffs_obj *reldir, const YCHAR *path, mode_t mode)
2568 struct yaffs_obj *obj = NULL;
2569 struct yaffs_obj *dir = NULL;
2574 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2575 yaffsfs_SetError(-EFAULT);
2579 if (yaffsfs_CheckPath(path) < 0) {
2580 yaffsfs_SetError(-ENAMETOOLONG);
2584 if (mode & ~(0777)) {
2585 yaffsfs_SetError(-EINVAL);
2591 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
2592 obj = yaffsfs_FollowLink(obj, 0, &loop);
2595 yaffsfs_SetError(-ENOTDIR);
2597 yaffsfs_SetError(-ELOOP);
2598 else if (!dir || !obj)
2599 yaffsfs_SetError(-ENOENT);
2600 else if (obj->my_dev->read_only)
2601 yaffsfs_SetError(-EROFS);
2603 retVal = yaffsfs_DoChMod(obj, mode);
2611 int yaffs_chmod_reldev(struct yaffs_dev *dev, const YCHAR *path, mode_t mode)
2613 return yaffs_chmod_reldir(ROOT_DIR(dev), path, mode);
2616 int yaffs_chmod(const YCHAR *path, mode_t mode)
2618 return yaffs_chmod_reldir(NULL, path, mode);
2621 int yaffs_fchmod(int fd, mode_t mode)
2623 struct yaffs_obj *obj;
2626 if (mode & ~(0777)) {
2627 yaffsfs_SetError(-EINVAL);
2632 obj = yaffsfs_HandleToObject(fd);
2635 yaffsfs_SetError(-EBADF);
2636 else if (obj->my_dev->read_only)
2637 yaffsfs_SetError(-EROFS);
2639 retVal = yaffsfs_DoChMod(obj, mode);
2646 int yaffs_mkdir_reldir(struct yaffs_obj *reldir, const YCHAR *path, mode_t mode)
2648 struct yaffs_obj *parent = NULL;
2649 struct yaffs_obj *dir = NULL;
2651 YCHAR *alt_path = NULL;
2656 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2657 yaffsfs_SetError(-EFAULT);
2661 if (yaffsfs_CheckPath(path) < 0) {
2662 yaffsfs_SetError(-ENAMETOOLONG);
2666 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2667 yaffsfs_SetError(-ENOMEM);
2674 parent = yaffsfs_FindDirectory(reldir, path, &name, 0, ¬Dir, &loop);
2675 if (!parent && notDir)
2676 yaffsfs_SetError(-ENOTDIR);
2678 yaffsfs_SetError(-ELOOP);
2680 yaffsfs_SetError(-ENOENT);
2681 else if (yaffsfs_TooManyObjects(parent->my_dev))
2682 yaffsfs_SetError(-ENFILE);
2683 else if (yaffs_strnlen(name, 5) == 0) {
2684 /* Trying to make the root itself */
2685 yaffsfs_SetError(-EEXIST);
2686 } else if (parent->my_dev->read_only)
2687 yaffsfs_SetError(-EROFS);
2689 dir = yaffs_create_dir(parent, name, mode, 0, 0);
2692 else if (yaffs_find_by_name(parent, name))
2693 yaffsfs_SetError(-EEXIST); /* name exists */
2695 yaffsfs_SetError(-ENOSPC); /* assume no space */
2705 int yaffs_mkdir_reldev(struct yaffs_dev *dev, const YCHAR *path, mode_t mode)
2707 return yaffs_mkdir_reldir(ROOT_DIR(dev), path, mode);
2710 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2712 return yaffs_mkdir_reldir(NULL, path, mode);
2715 int yaffs_rmdir_reldir(struct yaffs_obj *reldir, const YCHAR *path)
2720 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2721 yaffsfs_SetError(-EFAULT);
2725 if (yaffsfs_CheckPath(path) < 0) {
2726 yaffsfs_SetError(-ENAMETOOLONG);
2730 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2731 yaffsfs_SetError(-ENOMEM);
2736 result = yaffsfs_DoUnlink_reldir(reldir, path, 1);
2743 int yaffs_rmdir_reldev(struct yaffs_dev *dev, const YCHAR *path)
2745 return yaffs_rmdir_reldir(ROOT_DIR(dev), path);
2748 int yaffs_rmdir(const YCHAR *path)
2750 return yaffs_rmdir_reldir(NULL, path);
2754 * The mount/unmount/sync functions act on devices rather than reldirs.
2756 void *yaffs_getdev(const YCHAR *path)
2758 struct yaffs_dev *dev = NULL;
2760 dev = yaffsfs_FindDevice(path, &dummy);
2764 int yaffs_mount_common(struct yaffs_dev *dev, const YCHAR *path,
2765 int read_only, int skip_checkpt)
2768 int result = YAFFS_FAIL;
2771 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2772 yaffsfs_SetError(-EFAULT);
2776 yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path);
2778 if (yaffsfs_CheckPath(path) < 0) {
2779 yaffsfs_SetError(-ENAMETOOLONG);
2786 yaffsfs_InitHandles();
2789 dev = yaffsfs_FindMountPoint(path);
2792 if (!dev->is_mounted) {
2793 dev->read_only = read_only ? 1 : 0;
2795 u8 skip = dev->param.skip_checkpt_rd;
2796 dev->param.skip_checkpt_rd = 1;
2797 result = yaffs_guts_initialise(dev);
2798 dev->param.skip_checkpt_rd = skip;
2800 result = yaffs_guts_initialise(dev);
2803 if (result == YAFFS_FAIL)
2804 yaffsfs_SetError(-ENOMEM);
2805 retVal = result ? 0 : -1;
2808 yaffsfs_SetError(-EBUSY);
2810 yaffsfs_SetError(-ENODEV);
2817 int yaffs_mount3_reldev(struct yaffs_dev *dev, int read_only, int skip_checkpt)
2819 return yaffs_mount_common(dev, NULL, read_only, skip_checkpt);
2822 int yaffs_mount3(const YCHAR *path, int read_only, int skip_checkpt)
2824 return yaffs_mount_common(NULL, path, read_only, skip_checkpt);
2827 int yaffs_mount2_reldev(struct yaffs_dev *dev, int readonly)
2829 return yaffs_mount_common(dev, NULL, readonly, 0);
2832 int yaffs_mount2(const YCHAR *path, int readonly)
2834 return yaffs_mount_common(NULL, path, readonly, 0);
2837 int yaffs_mount_reldev(struct yaffs_dev *dev)
2839 return yaffs_mount_common(dev, NULL, 0, 0);
2842 int yaffs_mount(const YCHAR *path)
2844 return yaffs_mount_common(NULL, path, 0, 0);
2847 int yaffs_sync_common(struct yaffs_dev *dev, const YCHAR *path)
2853 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2854 yaffsfs_SetError(-EFAULT);
2858 if (yaffsfs_CheckPath(path) < 0) {
2859 yaffsfs_SetError(-ENAMETOOLONG);
2866 dev = yaffsfs_FindDevice(path, &dummy);
2869 if (!dev->is_mounted)
2870 yaffsfs_SetError(-EINVAL);
2871 else if (dev->read_only)
2872 yaffsfs_SetError(-EROFS);
2875 yaffs_flush_whole_cache(dev, 0);
2876 yaffs_checkpoint_save(dev);
2881 yaffsfs_SetError(-ENODEV);
2887 int yaffs_sync_reldev(struct yaffs_dev *dev)
2889 return yaffs_sync_common(dev, NULL);
2892 int yaffs_sync(const YCHAR *path)
2894 return yaffs_sync_common(NULL, path);
2898 static int yaffsfs_bg_gc_common(struct yaffs_dev *dev,
2906 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2907 yaffsfs_SetError(-EFAULT);
2911 if (yaffsfs_CheckPath(path) < 0) {
2912 yaffsfs_SetError(-ENAMETOOLONG);
2919 dev = yaffsfs_FindDevice(path, &dummy);
2922 if (!dev->is_mounted)
2923 yaffsfs_SetError(-EINVAL);
2925 retVal = yaffs_bg_gc(dev, urgency);
2927 yaffsfs_SetError(-ENODEV);
2933 /* Background gc functions.
2934 * These return 0 when bg done or greater than 0 when gc has been
2935 * done and there is still a lot of garbage to be cleaned up.
2938 int yaffs_do_background_gc(const YCHAR *path, int urgency)
2940 return yaffsfs_bg_gc_common(NULL, path, urgency);
2943 int yaffs_do_background_gc_reldev(struct yaffs_dev *dev, int urgency)
2945 return yaffsfs_bg_gc_common(dev, NULL, urgency);
2948 static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
2951 struct yaffs_obj *obj;
2953 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
2954 obj = yaffsfs_HandleToObject(i);
2955 if (obj && obj->my_dev == dev)
2961 int yaffs_remount_common(struct yaffs_dev *dev, const YCHAR *path,
2962 int force, int read_only)
2966 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
2967 yaffsfs_SetError(-EFAULT);
2971 if (yaffsfs_CheckPath(path) < 0) {
2972 yaffsfs_SetError(-ENAMETOOLONG);
2978 dev = yaffsfs_FindMountPoint(path);
2981 if (dev->is_mounted) {
2982 yaffs_flush_whole_cache(dev, 0);
2984 if (force || !yaffsfs_IsDevBusy(dev)) {
2986 yaffs_checkpoint_save(dev);
2987 dev->read_only = read_only ? 1 : 0;
2990 yaffsfs_SetError(-EBUSY);
2993 yaffsfs_SetError(-EINVAL);
2996 yaffsfs_SetError(-ENODEV);
3003 int yaffs_remount_reldev(struct yaffs_dev *dev, int force, int read_only)
3005 return yaffs_remount_common(dev, NULL, force, read_only);
3007 int yaffs_remount(const YCHAR *path, int force, int read_only)
3009 return yaffs_remount_common(NULL, path, force, read_only);
3012 int yaffs_unmount2_common(struct yaffs_dev *dev, const YCHAR *path, int force)
3016 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3017 yaffsfs_SetError(-EFAULT);
3021 if (yaffsfs_CheckPath(path) < 0) {
3022 yaffsfs_SetError(-ENAMETOOLONG);
3028 dev = yaffsfs_FindMountPoint(path);
3031 if (dev->is_mounted) {
3033 yaffs_flush_whole_cache(dev, 0);
3034 yaffs_checkpoint_save(dev);
3035 inUse = yaffsfs_IsDevBusy(dev);
3036 if (!inUse || force) {
3038 yaffsfs_BreakDeviceHandles(dev);
3039 yaffs_deinitialise(dev);
3043 yaffsfs_SetError(-EBUSY);
3046 yaffsfs_SetError(-EINVAL);
3049 yaffsfs_SetError(-ENODEV);
3056 int yaffs_unmount2_reldev(struct yaffs_dev *dev, int force)
3058 return yaffs_unmount2_common(dev, NULL, force);
3061 int yaffs_unmount2(const YCHAR *path, int force)
3063 return yaffs_unmount2_common(NULL, path, force);
3066 int yaffs_unmount_reldev(struct yaffs_dev *dev)
3068 return yaffs_unmount2_reldev(dev, 0);
3071 int yaffs_unmount(const YCHAR *path)
3073 return yaffs_unmount2(path, 0);
3076 int yaffs_format_common(struct yaffs_dev *dev,
3079 int force_unmount_flag,
3087 yaffsfs_SetError(-EFAULT);
3091 if (yaffsfs_CheckPath(path) < 0) {
3092 yaffsfs_SetError(-ENAMETOOLONG);
3099 dev = yaffsfs_FindMountPoint(path);
3102 int was_mounted = dev->is_mounted;
3104 if (dev->is_mounted && unmount_flag) {
3106 yaffs_flush_whole_cache(dev, 0);
3107 yaffs_checkpoint_save(dev);
3108 inUse = yaffsfs_IsDevBusy(dev);
3109 if (!inUse || force_unmount_flag) {
3111 yaffsfs_BreakDeviceHandles(dev);
3112 yaffs_deinitialise(dev);
3116 if(dev->is_mounted) {
3117 yaffsfs_SetError(-EBUSY);
3120 yaffs_guts_format_dev(dev);
3121 if(was_mounted && remount_flag) {
3122 result = yaffs_guts_initialise(dev);
3123 if (result == YAFFS_FAIL) {
3124 yaffsfs_SetError(-ENOMEM);
3130 yaffsfs_SetError(-ENODEV);
3139 int yaffs_format_reldev(struct yaffs_dev *dev,
3141 int force_unmount_flag,
3144 return yaffs_format_common(dev, NULL, unmount_flag,
3145 force_unmount_flag, remount_flag);
3148 int yaffs_format(const YCHAR *path,
3150 int force_unmount_flag,
3153 return yaffs_format_common(NULL, path, unmount_flag,
3154 force_unmount_flag, remount_flag);
3157 Y_LOFF_T yaffs_freespace_common(struct yaffs_dev *dev, const YCHAR *path)
3159 Y_LOFF_T retVal = -1;
3163 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3164 yaffsfs_SetError(-EFAULT);
3168 if (yaffsfs_CheckPath(path) < 0) {
3169 yaffsfs_SetError(-ENAMETOOLONG);
3176 dev = yaffsfs_FindDevice(path, &dummy);
3177 if (dev && dev->is_mounted) {
3178 retVal = yaffs_get_n_free_chunks(dev);
3179 retVal *= dev->data_bytes_per_chunk;
3182 yaffsfs_SetError(-EINVAL);
3188 Y_LOFF_T yaffs_freespace_reldev(struct yaffs_dev *dev)
3190 return yaffs_freespace_common(dev, NULL);
3193 Y_LOFF_T yaffs_freespace(const YCHAR *path)
3195 return yaffs_freespace_common(NULL, path);
3198 Y_LOFF_T yaffs_totalspace_common(struct yaffs_dev *dev, const YCHAR *path)
3200 Y_LOFF_T retVal = -1;
3204 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3205 yaffsfs_SetError(-EFAULT);
3209 if (yaffsfs_CheckPath(path) < 0) {
3210 yaffsfs_SetError(-ENAMETOOLONG);
3217 dev = yaffsfs_FindDevice(path, &dummy);
3218 if (dev && dev->is_mounted) {
3219 retVal = (dev->param.end_block - dev->param.start_block + 1) -
3220 dev->param.n_reserved_blocks;
3221 retVal *= dev->param.chunks_per_block;
3222 retVal *= dev->data_bytes_per_chunk;
3225 yaffsfs_SetError(-EINVAL);
3231 Y_LOFF_T yaffs_totalspace_reldev(struct yaffs_dev *dev)
3233 return yaffs_totalspace_common(dev, NULL);
3236 Y_LOFF_T yaffs_totalspace(const YCHAR *path)
3238 return yaffs_totalspace_common(NULL, path);
3241 int yaffs_inodecount_common(struct yaffs_dev *dev, const YCHAR *path)
3243 Y_LOFF_T retVal = -1;
3247 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3248 yaffsfs_SetError(-EFAULT);
3252 if (yaffsfs_CheckPath(path) < 0) {
3253 yaffsfs_SetError(-ENAMETOOLONG);
3260 dev = yaffsfs_FindDevice(path, &dummy);
3261 if (dev && dev->is_mounted) {
3262 int n_obj = dev->n_obj;
3263 if (n_obj > dev->n_hardlinks)
3264 retVal = n_obj - dev->n_hardlinks;
3268 yaffsfs_SetError(-EINVAL);
3274 int yaffs_inodecount_reldev(struct yaffs_dev *dev)
3276 return yaffs_inodecount_common(dev, NULL);
3279 int yaffs_inodecount(const YCHAR *path)
3281 return yaffs_inodecount_common(NULL, path);
3284 void yaffs_add_device(struct yaffs_dev *dev)
3286 struct list_head *cfg;
3287 /* First check that the device is not in the list. */
3289 list_for_each(cfg, &yaffsfs_deviceList) {
3290 if (dev == list_entry(cfg, struct yaffs_dev, dev_list))
3294 dev->is_mounted = 0;
3295 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
3297 if (!dev->dev_list.next)
3298 INIT_LIST_HEAD(&dev->dev_list);
3300 list_add(&dev->dev_list, &yaffsfs_deviceList);
3305 void yaffs_remove_device(struct yaffs_dev *dev)
3307 list_del_init(&dev->dev_list);
3310 /* Functions to iterate through devices. NB Use with extreme care! */
3312 static struct list_head *dev_iterator;
3313 void yaffs_dev_rewind(void)
3315 dev_iterator = yaffsfs_deviceList.next;
3318 struct yaffs_dev *yaffs_next_dev(void)
3320 struct yaffs_dev *retval;
3324 if (dev_iterator == &yaffsfs_deviceList)
3327 retval = list_entry(dev_iterator, struct yaffs_dev, dev_list);
3328 dev_iterator = dev_iterator->next;
3332 /* Directory search stuff. */
3334 static struct list_head search_contexts;
3336 static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContext *dsc)
3340 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
3344 if (list_empty(&dsc->dirObj->variant.dir_variant.children))
3345 dsc->nextReturn = NULL;
3348 list_entry(dsc->dirObj->variant.dir_variant.
3349 children.next, struct yaffs_obj,
3352 /* Hey someone isn't playing nice! */
3356 static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContext *dsc)
3360 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
3362 if (dsc->nextReturn == NULL ||
3363 list_empty(&dsc->dirObj->variant.dir_variant.children))
3364 dsc->nextReturn = NULL;
3366 struct list_head *next = dsc->nextReturn->siblings.next;
3368 if (next == &dsc->dirObj->variant.dir_variant.children)
3369 dsc->nextReturn = NULL; /* end of list */
3371 dsc->nextReturn = list_entry(next,
3376 /* Hey someone isn't playing nice! */
3380 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
3383 struct list_head *i;
3384 struct yaffsfs_DirSearchContext *dsc;
3386 /* if search contexts not initilised then skip */
3387 if (!search_contexts.next)
3390 /* Iterate through the directory search contexts.
3391 * If any are the one being removed, then advance the dsc to
3392 * the next one to prevent a hanging ptr.
3394 list_for_each(i, &search_contexts) {
3396 dsc = list_entry(i, struct yaffsfs_DirSearchContext,
3398 if (dsc->nextReturn == obj)
3399 yaffsfs_DirAdvance(dsc);
3405 static yaffs_DIR *yaffsfs_opendir_reldir_no_lock(struct yaffs_obj *reldir,
3406 const YCHAR *dirname)
3408 yaffs_DIR *dir = NULL;
3409 struct yaffs_obj *obj = NULL;
3410 struct yaffsfs_DirSearchContext *dsc = NULL;
3414 if (yaffsfs_CheckMemRegion(dirname, 0, 0) < 0) {
3415 yaffsfs_SetError(-EFAULT);
3419 if (yaffsfs_CheckPath(dirname) < 0) {
3420 yaffsfs_SetError(-ENAMETOOLONG);
3424 obj = yaffsfs_FindObject(reldir, dirname, 0, 1, NULL, ¬Dir, &loop);
3427 yaffsfs_SetError(-ENOTDIR);
3429 yaffsfs_SetError(-ELOOP);
3431 yaffsfs_SetError(-ENOENT);
3432 else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
3433 yaffsfs_SetError(-ENOTDIR);
3437 for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) {
3438 if (!yaffsfs_dsc[i].inUse)
3439 dsc = &yaffsfs_dsc[i];
3442 dir = (yaffs_DIR *) dsc;
3445 memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContext));
3448 yaffs_strncpy(dsc->name, dirname, NAME_MAX);
3449 INIT_LIST_HEAD(&dsc->others);
3451 if (!search_contexts.next)
3452 INIT_LIST_HEAD(&search_contexts);
3454 list_add(&dsc->others, &search_contexts);
3455 yaffsfs_SetDirRewound(dsc);
3461 yaffs_DIR *yaffs_opendir_reldir(struct yaffs_obj *reldir, const YCHAR *dirname)
3466 ret = yaffsfs_opendir_reldir_no_lock(reldir, dirname);
3471 yaffs_DIR *yaffs_opendir_reldev(struct yaffs_dev *dev, const YCHAR *dirname)
3473 return yaffs_opendir_reldir(ROOT_DIR(dev), dirname);
3476 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
3478 return yaffs_opendir_reldir(NULL, dirname);
3481 struct yaffs_dirent *yaffsfs_readdir_no_lock(yaffs_DIR * dirp)
3483 struct yaffsfs_DirSearchContext *dsc;
3484 struct yaffs_dirent *retVal = NULL;
3486 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3489 if (dsc && dsc->inUse) {
3490 yaffsfs_SetError(0);
3491 if (dsc->nextReturn) {
3493 yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
3494 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
3495 dsc->de.d_off = dsc->offset++;
3496 yaffs_get_obj_name(dsc->nextReturn,
3497 dsc->de.d_name, NAME_MAX);
3498 if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) {
3499 /* this should not happen! */
3500 yaffs_strcpy(dsc->de.d_name, _Y("zz"));
3502 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
3504 yaffsfs_DirAdvance(dsc);
3508 yaffsfs_SetError(-EBADF);
3513 struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp)
3515 struct yaffs_dirent *ret;
3518 ret = yaffsfs_readdir_no_lock(dirp);
3523 static void yaffsfs_rewinddir_no_lock(yaffs_DIR *dirp)
3525 struct yaffsfs_DirSearchContext *dsc;
3527 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3529 if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0)
3532 yaffsfs_SetDirRewound(dsc);
3536 void yaffs_rewinddir(yaffs_DIR *dirp)
3539 yaffsfs_rewinddir_no_lock(dirp);
3543 struct yaffs_dirent *yaffs_readdir_fd(int fd)
3545 struct yaffs_dirent *ret = NULL;
3546 struct yaffsfs_FileDes *f;
3549 f = yaffsfs_HandleToFileDes(fd);
3551 ret = yaffsfs_readdir_no_lock(f->v.dir);
3556 void yaffs_rewinddir_fd(int fd)
3558 struct yaffsfs_FileDes *f;
3561 f = yaffsfs_HandleToFileDes(fd);
3563 yaffsfs_rewinddir_no_lock(f->v.dir);
3568 static int yaffsfs_closedir_no_lock(yaffs_DIR *dirp)
3570 struct yaffsfs_DirSearchContext *dsc;
3572 dsc = (struct yaffsfs_DirSearchContext *) dirp;
3574 if (yaffsfs_CheckMemRegion(dirp, sizeof(*dsc), 0) < 0) {
3575 yaffsfs_SetError(-EFAULT);
3580 list_del(&dsc->others); /* unhook from list */
3584 int yaffs_closedir(yaffs_DIR *dirp)
3589 ret = yaffsfs_closedir_no_lock(dirp);
3594 /* End of directory stuff */
3596 int yaffs_symlink_reldir(struct yaffs_obj *reldir,
3597 const YCHAR *oldpath, const YCHAR *newpath)
3599 struct yaffs_obj *parent = NULL;
3600 struct yaffs_obj *obj;
3603 int mode = 0; /* ignore for now */
3607 if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
3608 yaffsfs_CheckMemRegion(newpath, 0, 0) < 0) {
3609 yaffsfs_SetError(-EFAULT);
3613 if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3614 yaffsfs_SetError(-ENAMETOOLONG);
3619 parent = yaffsfs_FindDirectory(reldir, newpath, &name, 0, ¬Dir, &loop);
3620 if (!parent && notDir)
3621 yaffsfs_SetError(-ENOTDIR);
3623 yaffsfs_SetError(-ELOOP);
3624 else if (!parent || yaffs_strnlen(name, 5) < 1)
3625 yaffsfs_SetError(-ENOENT);
3626 else if (yaffsfs_TooManyObjects(parent->my_dev))
3627 yaffsfs_SetError(-ENFILE);
3628 else if (parent->my_dev->read_only)
3629 yaffsfs_SetError(-EROFS);
3631 obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath);
3634 else if (yaffsfs_FindObject(reldir, newpath, 0, 0,
3636 yaffsfs_SetError(-EEXIST);
3638 yaffsfs_SetError(-ENOSPC);
3646 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
3648 return yaffs_symlink_reldir(NULL, oldpath, newpath);
3651 int yaffs_readlink_reldir(struct yaffs_obj *reldir,const YCHAR *path,
3652 YCHAR *buf, int bufsiz)
3654 struct yaffs_obj *obj = NULL;
3655 struct yaffs_obj *dir = NULL;
3660 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0 ||
3661 yaffsfs_CheckMemRegion(buf, bufsiz, 1) < 0) {
3662 yaffsfs_SetError(-EFAULT);
3668 obj = yaffsfs_FindObject(reldir, path, 0, 1, &dir, ¬Dir, &loop);
3671 yaffsfs_SetError(-ENOTDIR);
3673 yaffsfs_SetError(-ELOOP);
3674 else if (!dir || !obj)
3675 yaffsfs_SetError(-ENOENT);
3676 else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
3677 yaffsfs_SetError(-EINVAL);
3679 YCHAR *alias = obj->variant.symlink_variant.alias;
3680 memset(buf, 0, bufsiz);
3681 yaffs_strncpy(buf, alias, bufsiz - 1);
3687 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
3689 return yaffs_readlink_reldir(NULL, path, buf, bufsiz);
3692 int yaffs_link_reldir(struct yaffs_obj *reldir,
3693 const YCHAR *oldpath, const YCHAR *linkpath)
3695 /* Creates a link called newpath to existing oldpath */
3696 struct yaffs_obj *obj = NULL;
3697 struct yaffs_obj *lnk = NULL;
3698 struct yaffs_obj *obj_dir = NULL;
3699 struct yaffs_obj *lnk_dir = NULL;
3707 if (yaffsfs_CheckMemRegion(oldpath, 0, 0) < 0 ||
3708 yaffsfs_CheckMemRegion(linkpath, 0, 0) < 0) {
3709 yaffsfs_SetError(-EFAULT);
3713 if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3714 yaffsfs_SetError(-ENAMETOOLONG);
3720 obj = yaffsfs_FindObject(reldir, oldpath, 0, 1,
3721 &obj_dir, ¬DirObj, &objLoop);
3722 lnk = yaffsfs_FindObject(reldir, linkpath, 0, 0, NULL, NULL, NULL);
3723 lnk_dir = yaffsfs_FindDirectory(reldir, linkpath, &newname,
3724 0, ¬DirLnk, &lnkLoop);
3726 if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
3727 yaffsfs_SetError(-ENOTDIR);
3728 else if (objLoop || lnkLoop)
3729 yaffsfs_SetError(-ELOOP);
3730 else if (!obj_dir || !lnk_dir || !obj)
3731 yaffsfs_SetError(-ENOENT);
3732 else if (obj->my_dev->read_only)
3733 yaffsfs_SetError(-EROFS);
3734 else if (yaffsfs_TooManyObjects(obj->my_dev))
3735 yaffsfs_SetError(-ENFILE);
3737 yaffsfs_SetError(-EEXIST);
3738 else if (lnk_dir->my_dev != obj->my_dev)
3739 yaffsfs_SetError(-EXDEV);
3741 retVal = yaffsfs_CheckNameLength(newname);
3744 lnk = yaffs_link_obj(lnk_dir, newname, obj);
3748 yaffsfs_SetError(-ENOSPC);
3757 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
3759 return yaffs_link_reldir(NULL, oldpath, linkpath);
3762 int yaffs_mknod_reldir(struct yaffs_obj *reldir, const YCHAR *pathname,
3763 mode_t mode, dev_t dev_val)
3770 yaffsfs_SetError(-EINVAL);
3774 int yaffs_mknod_reldev(struct yaffs_dev *dev, const YCHAR *pathname, mode_t mode, dev_t dev_val)
3776 return yaffs_mknod_reldir(ROOT_DIR(dev), pathname, mode, dev_val);
3779 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev_val)
3781 return yaffs_mknod_reldir(NULL, pathname, mode, dev_val);
3785 * D E B U G F U N C T I O N S
3790 * Returns number of handles attached to the object
3792 int yaffs_n_handles_reldir(struct yaffs_obj *reldir, const YCHAR *path)
3794 struct yaffs_obj *obj;
3796 if (yaffsfs_CheckMemRegion(path, 0, 0) < 0) {
3797 yaffsfs_SetError(-EFAULT);
3801 if (yaffsfs_CheckPath(path) < 0) {
3802 yaffsfs_SetError(-ENAMETOOLONG);
3806 obj = yaffsfs_FindObject(reldir, path, 0, 1, NULL, NULL, NULL);
3809 return yaffsfs_CountHandles(obj);
3814 int yaffs_n_handles(const YCHAR *path)
3816 return yaffs_n_handles_reldir(NULL, path);
3819 int yaffs_get_error(void)
3821 return yaffsfs_GetLastError();
3824 int yaffs_set_error(int error)
3826 yaffsfs_SetError(error);
3830 int yaffs_dump_dev_reldir(struct yaffs_obj *reldir, const YCHAR *path)
3840 reldir = yaffsfs_FindRoot(path, &rest);
3843 struct yaffs_dev *dev = reldir->my_dev;
3846 "n_page_writes.......... %d\n"
3847 "n_page_reads........... %d\n"
3848 "n_erasures....... %d\n"
3849 "n_gc_copies............ %d\n"
3850 "garbageCollections... %d\n"
3851 "passiveGarbageColl'ns %d\n"
3857 dev->garbageCollections, dev->passiveGarbageCollections);
3864 int yaffs_dump_dev(const YCHAR *path)
3866 return yaffs_dump_dev_reldir(NULL, path);