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.
16 #include "yaffs_guts.h"
19 #include "yaffs_trace.h"
20 #include <dm/devres.h>
22 #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
25 #define NULL ((void *)0)
28 /* YAFFSFS_RW_SIZE must be a power of 2 */
29 #define YAFFSFS_RW_SHIFT (13)
30 #define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT)
32 /* Some forward references */
33 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
35 int symDepth, int getEquiv,
36 struct yaffs_obj **dirOut,
37 int *notDir, int *loop);
39 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
41 unsigned int yaffs_wr_attempts;
45 * There are open inodes in struct yaffsfs_Inode.
46 * There are open file descriptors in yaffsfs_FileDes.
47 * There are open handles in yaffsfs_FileDes.
49 * Things are structured this way to be like the Linux VFS model
50 * so that interactions with the yaffs guts calls are similar.
51 * That means more common code paths and less special code.
52 * That means better testing etc.
54 * We have 3 layers because:
55 * A handle is different than an fd because you can use dup()
56 * to create a new handle that accesses the *same* fd. The two
57 * handles will use the same offset (part of the fd). We only close
58 * down the fd when there are no more handles accessing it.
60 * More than one fd can currently access one file, but each fd
61 * has its own permsiions and offset.
64 struct yaffsfs_Inode {
65 int count; /* Number of handles accessing this inode */
66 struct yaffs_obj *iObj;
69 struct yaffsfs_FileDes {
75 int inodeId:12; /* Index to corresponding yaffsfs_Inode */
76 int handleCount:10; /* Number of handles for this fd */
77 loff_t position; /* current position in file */
80 struct yaffsfs_Handle {
86 struct yaffsfs_DirSearchContxt {
87 struct yaffs_dirent de; /* directory entry */
88 YCHAR name[NAME_MAX + 1]; /* name of directory being searched */
89 struct yaffs_obj *dirObj; /* ptr to directory being searched */
90 struct yaffs_obj *nextReturn; /* obj returned by next readddir */
91 struct list_head others;
96 static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC];
97 static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
98 static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
99 static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
101 static int yaffsfs_handlesInitialised;
103 unsigned yaffs_set_trace(unsigned tm)
105 yaffs_trace_mask = tm;
106 return yaffs_trace_mask;
109 unsigned yaffs_get_trace(void)
111 return yaffs_trace_mask;
116 * Inilitalise handle management on start-up.
119 static void yaffsfs_InitHandles(void)
122 if (yaffsfs_handlesInitialised)
125 memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode));
126 memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd));
127 memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle));
128 memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc));
130 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
131 yaffsfs_fd[i].inodeId = -1;
132 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
133 yaffsfs_handle[i].fdId = -1;
136 static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
138 if (h >= 0 && h < YAFFSFS_N_HANDLES)
139 return &yaffsfs_handle[h];
143 static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
145 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
147 if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
148 return &yaffsfs_fd[h->fdId];
153 static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
155 struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
157 if (fd && fd->handleCount > 0 &&
158 fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
159 return &yaffsfs_inode[fd->inodeId];
164 static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
166 struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
175 * yaffsfs_FindInodeIdForObject
176 * Find the inode entry for an object, if it exists.
179 static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
185 obj = yaffs_get_equivalent_obj(obj);
187 /* Look for it in open inode table */
188 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
189 if (yaffsfs_inode[i].iObj == obj)
196 * yaffsfs_GetInodeIdForObject
197 * Grab an inode entry when opening a new inode.
199 static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
203 struct yaffsfs_Inode *in = NULL;
206 obj = yaffs_get_equivalent_obj(obj);
208 ret = yaffsfs_FindInodeIdForObject(obj);
210 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
211 if (!yaffsfs_inode[i].iObj)
216 in = &yaffsfs_inode[ret];
226 static int yaffsfs_CountHandles(struct yaffs_obj *obj)
228 int i = yaffsfs_FindInodeIdForObject(obj);
231 return yaffsfs_inode[i].count;
236 static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in)
238 struct yaffs_obj *obj;
245 obj->my_inode = NULL;
250 static void yaffsfs_PutInode(int inodeId)
252 if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) {
253 struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId];
255 if (in->count <= 0) {
256 yaffsfs_ReleaseInode(in);
262 static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr)
265 struct yaffsfs_Handle *h;
267 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
268 h = &yaffsfs_handle[i];
269 if (h->useCount < 1) {
270 memset(h, 0, sizeof(struct yaffsfs_Handle));
281 static int yaffsfs_NewHandleAndFileDes(void)
284 struct yaffsfs_FileDes *fd;
285 struct yaffsfs_Handle *h = NULL;
286 int handle = yaffsfs_NewHandle(&h);
291 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
293 if (fd->handleCount < 1) {
294 memset(fd, 0, sizeof(struct yaffsfs_FileDes));
302 /* Dump the handle because we could not get a fd */
309 * Increase use of handle when reading/writing a file
310 * Also gets the file descriptor.
313 static int yaffsfs_GetHandle(int handle)
315 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
317 if (h && h->useCount > 0) {
326 * Let go of a handle when closing a file or aborting an open or
327 * ending a read or write.
330 static int yaffsfs_PutFileDes(int fdId)
332 struct yaffsfs_FileDes *fd;
334 if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) {
335 fd = &yaffsfs_fd[fdId];
337 if (fd->handleCount < 1) {
338 if (fd->inodeId >= 0) {
339 yaffsfs_PutInode(fd->inodeId);
347 static int yaffsfs_PutHandle(int handle)
349 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
351 if (h && h->useCount > 0) {
353 if (h->useCount < 1) {
354 yaffsfs_PutFileDes(h->fdId);
362 static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
364 struct yaffsfs_FileDes *fd;
365 struct yaffsfs_Handle *h;
366 struct yaffs_obj *obj;
368 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
369 h = yaffsfs_HandleToPointer(i);
370 fd = yaffsfs_HandleToFileDes(i);
371 obj = yaffsfs_HandleToObject(i);
372 if (h && h->useCount > 0) {
376 if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) {
378 yaffsfs_PutInode(fd->inodeId);
385 * Stuff to handle names.
387 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
389 static int yaffs_toupper(YCHAR a)
391 if (a >= 'a' && a <= 'z')
392 return (a - 'a') + 'A';
397 int yaffsfs_Match(YCHAR a, YCHAR b)
399 return (yaffs_toupper(a) == yaffs_toupper(b));
402 int yaffsfs_Match(YCHAR a, YCHAR b)
409 int yaffsfs_IsPathDivider(YCHAR ch)
411 const YCHAR *str = YAFFS_PATH_DIVIDERS;
422 int yaffsfs_CheckNameLength(const char *name)
426 int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1);
428 if (nameLength == 0) {
429 yaffsfs_SetError(-ENOENT);
431 } else if (nameLength > YAFFS_MAX_NAME_LENGTH) {
432 yaffsfs_SetError(-ENAMETOOLONG);
439 static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
441 YCHAR *alt_path = NULL;
446 * We don't have a definition for max path length.
447 * We will use 3 * max name length instead.
450 path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1);
452 /* If the last character is a path divider, then we need to
453 * trim it back so that the name look-up works properly.
454 * eg. /foo/new_dir/ -> /foo/newdir
455 * Curveball: Need to handle multiple path dividers:
456 * eg. /foof/sdfse///// -> /foo/sdfse
458 if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) {
459 alt_path = kmalloc(path_length + 1, 0);
462 yaffs_strcpy(alt_path, path);
463 for (i = path_length - 1;
464 i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--)
465 alt_path[i] = (YCHAR) 0;
467 *ret_path = alt_path;
471 LIST_HEAD(yaffsfs_deviceList);
476 * Scan the configuration list to find the device
477 * Curveballs: Should match paths that end in '/' too
478 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
480 static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
483 struct list_head *cfg;
484 const YCHAR *leftOver;
486 struct yaffs_dev *retval = NULL;
487 struct yaffs_dev *dev = NULL;
489 int longestMatch = -1;
493 * Check all configs, choose the one that:
494 * 1) Actually matches a prefix (ie /a amd /abc will not match
495 * 2) Matches the longest.
497 list_for_each(cfg, &yaffsfs_deviceList) {
498 dev = list_entry(cfg, struct yaffs_dev, dev_list);
504 while (matching && *p && *leftOver) {
505 /* Skip over any /s */
506 while (yaffsfs_IsPathDivider(*p))
509 /* Skip over any /s */
510 while (yaffsfs_IsPathDivider(*leftOver))
513 /* Now match the text part */
515 *p && !yaffsfs_IsPathDivider(*p) &&
516 *leftOver && !yaffsfs_IsPathDivider(*leftOver)) {
517 if (yaffsfs_Match(*p, *leftOver)) {
527 /* Skip over any /s in leftOver */
528 while (yaffsfs_IsPathDivider(*leftOver))
531 /*Skip over any /s in p */
532 while (yaffsfs_IsPathDivider(*p))
535 /* p should now be at the end of the string if fully matched */
539 if (matching && (thisMatchLength > longestMatch)) {
541 *restOfPath = (YCHAR *) leftOver;
543 longestMatch = thisMatchLength;
550 static int yaffsfs_CheckPath(const YCHAR *path)
555 while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) {
556 if (yaffsfs_IsPathDivider(*path)) {
564 return (*path) ? -1 : 0;
567 /* FindMountPoint only returns a dev entry if the path is a mount point */
568 static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
570 struct yaffs_dev *dev;
571 YCHAR *restOfPath = NULL;
573 dev = yaffsfs_FindDevice(path, &restOfPath);
574 if (dev && restOfPath && *restOfPath)
579 static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path,
582 struct yaffs_dev *dev;
584 dev = yaffsfs_FindDevice(path, restOfPath);
585 if (dev && dev->is_mounted)
586 return dev->root_dir;
591 static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
592 int symDepth, int *loop)
596 obj = yaffs_get_equivalent_obj(obj);
598 while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
599 YCHAR *alias = obj->variant.symlink_variant.alias;
601 if (yaffsfs_IsPathDivider(*alias))
602 /* Starts with a /, need to scan from root up */
603 obj = yaffsfs_FindObject(NULL, alias, symDepth++,
604 1, NULL, NULL, loop);
607 * Relative to here so use the parent of the
610 obj = yaffsfs_FindObject(obj->parent, alias, symDepth++,
611 1, NULL, NULL, loop);
617 * yaffsfs_FindDirectory
618 * Parse a path to determine the directory and the name within the directory.
620 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
622 static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
624 YCHAR **name, int symDepth,
625 int *notDir, int *loop)
627 struct yaffs_obj *dir;
629 YCHAR str[YAFFS_MAX_NAME_LENGTH + 1];
632 if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) {
640 restOfPath = (YCHAR *) path;
642 dir = yaffsfs_FindRoot(path, &restOfPath);
647 * curve ball: also throw away surplus '/'
648 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
650 while (yaffsfs_IsPathDivider(*restOfPath))
651 restOfPath++; /* get rid of '/' */
656 while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) {
657 if (i < YAFFS_MAX_NAME_LENGTH) {
658 str[i] = *restOfPath;
666 /* got to the end of the string */
669 if (yaffs_strcmp(str, _Y(".")) == 0) {
671 } else if (yaffs_strcmp(str, _Y("..")) == 0) {
674 dir = yaffs_find_by_name(dir, str);
676 dir = yaffsfs_FollowLink(dir, symDepth, loop);
678 if (dir && dir->variant_type !=
679 YAFFS_OBJECT_TYPE_DIRECTORY) {
688 /* directory did not exist. */
692 static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
696 int *notDir, int *loop)
698 return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir,
703 * yaffsfs_FindObject turns a path for an existing object into the object
705 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
706 const YCHAR *path, int symDepth,
708 struct yaffs_obj **dirOut,
709 int *notDir, int *loop)
711 struct yaffs_obj *dir;
712 struct yaffs_obj *obj;
716 yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop);
722 obj = yaffs_find_by_name(dir, name);
727 obj = yaffs_get_equivalent_obj(obj);
732 /*************************************************************************
733 * Start of yaffsfs visible functions.
734 *************************************************************************/
736 int yaffs_dup(int handle)
738 int newHandleNumber = -1;
739 struct yaffsfs_FileDes *existingFD = NULL;
740 struct yaffsfs_Handle *existingHandle = NULL;
741 struct yaffsfs_Handle *newHandle = NULL;
744 existingHandle = yaffsfs_HandleToPointer(handle);
745 existingFD = yaffsfs_HandleToFileDes(handle);
747 newHandleNumber = yaffsfs_NewHandle(&newHandle);
749 newHandle->fdId = existingHandle->fdId;
750 existingFD->handleCount++;
756 yaffsfs_SetError(-EBADF);
758 yaffsfs_SetError(-ENOMEM);
760 return newHandleNumber;
764 static int yaffsfs_TooManyObjects(struct yaffs_dev *dev)
766 int current_objects = dev->n_obj - dev->n_deleted_files;
768 if (dev->param.max_objects && current_objects > dev->param.max_objects)
774 int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
776 struct yaffs_obj *obj = NULL;
777 struct yaffs_obj *dir = NULL;
780 struct yaffsfs_FileDes *fd = NULL;
783 int errorReported = 0;
784 int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY);
785 u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
786 u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
787 u8 sharedReadAllowed;
788 u8 sharedWriteAllowed;
797 yaffsfs_SetError(-EFAULT);
801 if (yaffsfs_CheckPath(path) < 0) {
802 yaffsfs_SetError(-ENAMETOOLONG);
806 /* O_EXCL only has meaning if O_CREAT is specified */
807 if (!(oflag & O_CREAT))
810 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
811 if ((oflag & O_CREAT) & (oflag & O_EXCL))
814 /* Todo: Are there any more flag combos to sanitise ? */
816 /* Figure out if reading or writing is requested */
818 readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
819 writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
823 handle = yaffsfs_NewHandleAndFileDes();
826 yaffsfs_SetError(-ENFILE);
830 fd = yaffsfs_HandleToFileDes(handle);
832 /* try to find the exisiting object */
833 obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
835 obj = yaffsfs_FollowLink(obj, symDepth++, &loop);
838 obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
839 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
844 /* The file already exists or it might be a directory */
846 /* A directory can't be opened as a file */
847 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
849 yaffsfs_SetError(-EISDIR);
853 /* Open should fail if O_CREAT and O_EXCL are specified
854 * for a file that exists.
856 if (!errorReported &&
857 (oflag & O_EXCL) && (oflag & O_CREAT)) {
859 yaffsfs_SetError(-EEXIST);
863 /* Check file permissions */
864 if (readRequested && !(obj->yst_mode & S_IREAD))
867 if (writeRequested && !(obj->yst_mode & S_IWRITE))
870 if (!errorReported && writeRequested &&
871 obj->my_dev->read_only) {
873 yaffsfs_SetError(-EROFS);
877 if (openDenied && !errorReported) {
878 yaffsfs_SetError(-EACCES);
882 /* Check sharing of an existing object. */
884 struct yaffsfs_FileDes *fdx;
887 sharedReadAllowed = 1;
888 sharedWriteAllowed = 1;
891 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
892 fdx = &yaffsfs_fd[i];
893 if (fdx->handleCount > 0 &&
895 yaffsfs_inode[fdx->inodeId].iObj
898 sharedReadAllowed = 0;
899 if (!fdx->shareWrite)
900 sharedWriteAllowed = 0;
908 if ((!sharedReadAllowed && readRequested) ||
909 (!shareRead && alreadyReading) ||
910 (!sharedWriteAllowed && writeRequested) ||
911 (!shareWrite && alreadyWriting)) {
913 yaffsfs_SetError(-EBUSY);
920 /* If we could not open an existing object, then let's see if
921 * the directory exists. If not, error.
923 if (!obj && !errorReported) {
924 dir = yaffsfs_FindDirectory(NULL, path, &name, 0,
926 if (!dir && notDir) {
927 yaffsfs_SetError(-ENOTDIR);
930 yaffsfs_SetError(-ELOOP);
933 yaffsfs_SetError(-ENOENT);
938 if (!obj && dir && !errorReported && (oflag & O_CREAT)) {
939 /* Let's see if we can create this file */
940 if (dir->my_dev->read_only) {
941 yaffsfs_SetError(-EROFS);
943 } else if (yaffsfs_TooManyObjects(dir->my_dev)) {
944 yaffsfs_SetError(-ENFILE);
947 obj = yaffs_create_file(dir, name, mode, 0, 0);
949 if (!obj && !errorReported) {
950 yaffsfs_SetError(-ENOSPC);
955 if (!obj && dir && !errorReported && !(oflag & O_CREAT)) {
956 yaffsfs_SetError(-ENOENT);
960 if (obj && !openDenied) {
961 int inodeId = yaffsfs_GetInodeIdForObject(obj);
965 * Todo: Fix any problem if inodes run out,
966 * That can't happen if the number of inode
967 * items >= number of handles.
971 fd->inodeId = inodeId;
972 fd->reading = readRequested;
973 fd->writing = writeRequested;
974 fd->append = (oflag & O_APPEND) ? 1 : 0;
976 fd->shareRead = shareRead;
977 fd->shareWrite = shareWrite;
979 /* Hook inode to object */
980 obj->my_inode = (void *)&yaffsfs_inode[inodeId];
982 if ((oflag & O_TRUNC) && fd->writing)
983 yaffs_resize_file(obj, 0);
985 yaffsfs_PutHandle(handle);
987 yaffsfs_SetError(0); /* Problem */
997 int yaffs_open(const YCHAR *path, int oflag, int mode)
999 return yaffs_open_sharing(path, oflag, mode,
1000 YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
1003 int yaffs_Dofsync(int handle, int datasync)
1006 struct yaffs_obj *obj;
1010 obj = yaffsfs_HandleToObject(handle);
1013 yaffsfs_SetError(-EBADF);
1014 else if (obj->my_dev->read_only)
1015 yaffsfs_SetError(-EROFS);
1017 yaffs_flush_file(obj, 1, datasync);
1026 int yaffs_fsync(int handle)
1028 return yaffs_Dofsync(handle, 0);
1031 int yaffs_flush(int handle)
1033 return yaffs_fsync(handle);
1036 int yaffs_fdatasync(int handle)
1038 return yaffs_Dofsync(handle, 1);
1041 int yaffs_close(int handle)
1043 struct yaffsfs_Handle *h = NULL;
1044 struct yaffs_obj *obj = NULL;
1049 h = yaffsfs_HandleToPointer(handle);
1050 obj = yaffsfs_HandleToObject(handle);
1053 yaffsfs_SetError(-EBADF);
1056 yaffs_flush_file(obj, 1, 0);
1057 yaffsfs_PutHandle(handle);
1066 int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte,
1067 int isPread, loff_t offset)
1069 struct yaffsfs_FileDes *fd = NULL;
1070 struct yaffs_obj *obj = NULL;
1072 loff_t startPos = 0;
1078 u8 *buf = (u8 *) vbuf;
1081 yaffsfs_SetError(-EFAULT);
1086 fd = yaffsfs_HandleToFileDes(handle);
1087 obj = yaffsfs_HandleToObject(handle);
1091 yaffsfs_SetError(-EBADF);
1093 } else if (!fd->reading) {
1094 /* Not a reading handle */
1095 yaffsfs_SetError(-EINVAL);
1097 } else if (nbyte > YAFFS_MAX_FILE_SIZE) {
1098 yaffsfs_SetError(-EINVAL);
1104 startPos = fd->position;
1108 if (yaffs_get_obj_length(obj) > pos)
1109 maxRead = yaffs_get_obj_length(obj) - pos;
1113 if (nbyte > maxRead)
1116 yaffsfs_GetHandle(handle);
1118 endPos = pos + nbyte;
1120 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1121 nbyte > YAFFS_MAX_FILE_SIZE ||
1122 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1128 nToRead = YAFFSFS_RW_SIZE -
1129 (pos & (YAFFSFS_RW_SIZE - 1));
1130 if (nToRead > nbyte)
1134 * Need to reverify object in case the device was
1135 * unmounted in another thread.
1137 obj = yaffsfs_HandleToObject(handle);
1141 nRead = yaffs_file_rd(obj, buf, pos, nToRead);
1149 if (nRead == nToRead)
1152 nbyte = 0; /* no more to read */
1161 yaffsfs_PutHandle(handle);
1165 fd->position = startPos + totalRead;
1167 yaffsfs_SetError(-EINVAL);
1174 return (totalRead >= 0) ? totalRead : -1;
1178 int yaffs_read(int handle, void *buf, unsigned int nbyte)
1180 return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
1183 int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset)
1185 return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
1188 int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
1189 int isPwrite, loff_t offset)
1191 struct yaffsfs_FileDes *fd = NULL;
1192 struct yaffs_obj *obj = NULL;
1194 loff_t startPos = 0;
1197 int totalWritten = 0;
1198 int write_trhrough = 0;
1200 const u8 *buf = (const u8 *)vbuf;
1203 yaffsfs_SetError(-EFAULT);
1208 fd = yaffsfs_HandleToFileDes(handle);
1209 obj = yaffsfs_HandleToObject(handle);
1213 yaffsfs_SetError(-EBADF);
1215 } else if (!fd->writing) {
1216 yaffsfs_SetError(-EINVAL);
1218 } else if (obj->my_dev->read_only) {
1219 yaffsfs_SetError(-EROFS);
1223 startPos = yaffs_get_obj_length(obj);
1227 startPos = fd->position;
1229 yaffsfs_GetHandle(handle);
1231 endPos = pos + nbyte;
1233 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1234 nbyte > YAFFS_MAX_FILE_SIZE ||
1235 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1242 nToWrite = YAFFSFS_RW_SIZE -
1243 (pos & (YAFFSFS_RW_SIZE - 1));
1244 if (nToWrite > nbyte)
1248 * Need to reverify object in case the device was
1249 * remounted or unmounted in another thread.
1251 obj = yaffsfs_HandleToObject(handle);
1252 if (!obj || obj->my_dev->read_only)
1256 yaffs_wr_file(obj, buf, pos, nToWrite,
1259 totalWritten += nWritten;
1264 if (nWritten == nToWrite)
1269 if (nWritten < 1 && totalWritten < 1) {
1270 yaffsfs_SetError(-ENOSPC);
1280 yaffsfs_PutHandle(handle);
1283 if (totalWritten > 0)
1284 fd->position = startPos + totalWritten;
1286 yaffsfs_SetError(-EINVAL);
1292 return (totalWritten >= 0) ? totalWritten : -1;
1295 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1297 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1300 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset)
1302 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1305 int yaffs_truncate(const YCHAR *path, loff_t new_size)
1307 struct yaffs_obj *obj = NULL;
1308 struct yaffs_obj *dir = NULL;
1309 int result = YAFFS_FAIL;
1314 yaffsfs_SetError(-EFAULT);
1318 if (yaffsfs_CheckPath(path) < 0) {
1319 yaffsfs_SetError(-ENAMETOOLONG);
1325 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1326 obj = yaffsfs_FollowLink(obj, 0, &loop);
1329 yaffsfs_SetError(-ENOTDIR);
1331 yaffsfs_SetError(-ELOOP);
1332 else if (!dir || !obj)
1333 yaffsfs_SetError(-ENOENT);
1334 else if (obj->my_dev->read_only)
1335 yaffsfs_SetError(-EROFS);
1336 else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1337 yaffsfs_SetError(-EISDIR);
1338 else if (obj->my_dev->read_only)
1339 yaffsfs_SetError(-EROFS);
1340 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1341 yaffsfs_SetError(-EINVAL);
1343 result = yaffs_resize_file(obj, new_size);
1347 return (result) ? 0 : -1;
1350 int yaffs_ftruncate(int handle, loff_t new_size)
1352 struct yaffsfs_FileDes *fd = NULL;
1353 struct yaffs_obj *obj = NULL;
1357 fd = yaffsfs_HandleToFileDes(handle);
1358 obj = yaffsfs_HandleToObject(handle);
1362 yaffsfs_SetError(-EBADF);
1363 else if (!fd->writing)
1364 yaffsfs_SetError(-EINVAL);
1365 else if (obj->my_dev->read_only)
1366 yaffsfs_SetError(-EROFS);
1367 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1368 yaffsfs_SetError(-EINVAL);
1370 /* resize the file */
1371 result = yaffs_resize_file(obj, new_size);
1374 return (result) ? 0 : -1;
1378 loff_t yaffs_lseek(int handle, loff_t offset, int whence)
1380 struct yaffsfs_FileDes *fd = NULL;
1381 struct yaffs_obj *obj = NULL;
1386 fd = yaffsfs_HandleToFileDes(handle);
1387 obj = yaffsfs_HandleToObject(handle);
1390 yaffsfs_SetError(-EBADF);
1391 else if (offset > YAFFS_MAX_FILE_SIZE)
1392 yaffsfs_SetError(-EINVAL);
1394 if (whence == SEEK_SET) {
1397 } else if (whence == SEEK_CUR) {
1398 if ((fd->position + offset) >= 0)
1399 pos = (fd->position + offset);
1400 } else if (whence == SEEK_END) {
1401 fSize = yaffs_get_obj_length(obj);
1402 if (fSize >= 0 && (fSize + offset) >= 0)
1403 pos = fSize + offset;
1406 if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1409 yaffsfs_SetError(-EINVAL);
1419 int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory)
1421 struct yaffs_obj *dir = NULL;
1422 struct yaffs_obj *obj = NULL;
1424 int result = YAFFS_FAIL;
1429 yaffsfs_SetError(-EFAULT);
1433 if (yaffsfs_CheckPath(path) < 0) {
1434 yaffsfs_SetError(-ENAMETOOLONG);
1440 obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL);
1441 dir = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop);
1444 yaffsfs_SetError(-ENOTDIR);
1446 yaffsfs_SetError(-ELOOP);
1448 yaffsfs_SetError(-ENOENT);
1449 else if (yaffs_strncmp(name, _Y("."), 2) == 0)
1450 yaffsfs_SetError(-EINVAL);
1452 yaffsfs_SetError(-ENOENT);
1453 else if (obj->my_dev->read_only)
1454 yaffsfs_SetError(-EROFS);
1455 else if (!isDirectory &&
1456 obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1457 yaffsfs_SetError(-EISDIR);
1458 else if (isDirectory &&
1459 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1460 yaffsfs_SetError(-ENOTDIR);
1461 else if (isDirectory && obj == obj->my_dev->root_dir)
1462 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1464 result = yaffs_unlinker(dir, name);
1466 if (result == YAFFS_FAIL && isDirectory)
1467 yaffsfs_SetError(-ENOTEMPTY);
1472 return (result == YAFFS_FAIL) ? -1 : 0;
1475 int yaffs_unlink(const YCHAR *path)
1477 return yaffsfs_DoUnlink(path, 0);
1480 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1482 struct yaffs_obj *olddir = NULL;
1483 struct yaffs_obj *newdir = NULL;
1484 struct yaffs_obj *obj = NULL;
1485 struct yaffs_obj *newobj = NULL;
1488 int result = YAFFS_FAIL;
1489 int rename_allowed = 1;
1495 YCHAR *alt_newpath = NULL;
1497 if (!oldPath || !newPath) {
1498 yaffsfs_SetError(-EFAULT);
1502 if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) {
1503 yaffsfs_SetError(-ENAMETOOLONG);
1507 if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) {
1508 yaffsfs_SetError(-ENOMEM);
1512 newPath = alt_newpath;
1516 olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0,
1517 ¬OldDir, &oldLoop);
1518 newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0,
1519 ¬NewDir, &newLoop);
1520 obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL);
1521 newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL);
1523 /* If the object being renamed is a directory and the
1524 * path ended with a "/" then the olddir == obj.
1525 * We pass through NULL for the old name to tell the lower layers
1526 * to use olddir as the object.
1532 if ((!olddir && notOldDir) || (!newdir && notNewDir)) {
1533 yaffsfs_SetError(-ENOTDIR);
1535 } else if (oldLoop || newLoop) {
1536 yaffsfs_SetError(-ELOOP);
1538 } else if (olddir && oldname &&
1539 yaffs_strncmp(oldname, _Y("."), 2) == 0) {
1540 yaffsfs_SetError(-EINVAL);
1542 } else if (!olddir || !newdir || !obj) {
1543 yaffsfs_SetError(-ENOENT);
1545 } else if (obj->my_dev->read_only) {
1546 yaffsfs_SetError(-EROFS);
1548 } else if (yaffs_is_non_empty_dir(newobj)) {
1549 yaffsfs_SetError(-ENOTEMPTY);
1551 } else if (olddir->my_dev != newdir->my_dev) {
1552 /* Rename must be on same device */
1553 yaffsfs_SetError(-EXDEV);
1555 } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1557 * It is a directory, check that it is not being renamed to
1558 * being its own decendent.
1559 * Do this by tracing from the new directory back to the root,
1563 struct yaffs_obj *xx = newdir;
1565 while (rename_allowed && xx) {
1570 if (!rename_allowed)
1571 yaffsfs_SetError(-EINVAL);
1575 result = yaffs_rename_obj(olddir, oldname, newdir, newname);
1581 return (result == YAFFS_FAIL) ? -1 : 0;
1584 static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf)
1588 obj = yaffs_get_equivalent_obj(obj);
1591 buf->st_dev = (int)obj->my_dev->os_context;
1592 buf->st_ino = obj->obj_id;
1593 buf->st_mode = obj->yst_mode & ~S_IFMT;
1595 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1596 buf->st_mode |= S_IFDIR;
1597 else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1598 buf->st_mode |= S_IFLNK;
1599 else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1600 buf->st_mode |= S_IFREG;
1602 buf->st_nlink = yaffs_get_obj_link_count(obj);
1605 buf->st_rdev = obj->yst_rdev;
1606 buf->st_size = yaffs_get_obj_length(obj);
1607 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1608 buf->st_blocks = lldiv(buf->st_size + buf->st_blksize - 1,
1610 #if CONFIG_YAFFS_WINCE
1611 buf->yst_wince_atime[0] = obj->win_atime[0];
1612 buf->yst_wince_atime[1] = obj->win_atime[1];
1613 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1614 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1615 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1616 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1618 buf->yst_atime = obj->yst_atime;
1619 buf->yst_ctime = obj->yst_ctime;
1620 buf->yst_mtime = obj->yst_mtime;
1627 static int yaffsfs_DoStatOrLStat(const YCHAR *path,
1628 struct yaffs_stat *buf, int doLStat)
1630 struct yaffs_obj *obj = NULL;
1631 struct yaffs_obj *dir = NULL;
1636 if (!path || !buf) {
1637 yaffsfs_SetError(-EFAULT);
1641 if (yaffsfs_CheckPath(path) < 0) {
1642 yaffsfs_SetError(-ENAMETOOLONG);
1648 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1650 if (!doLStat && obj)
1651 obj = yaffsfs_FollowLink(obj, 0, &loop);
1654 yaffsfs_SetError(-ENOTDIR);
1656 yaffsfs_SetError(-ELOOP);
1657 else if (!dir || !obj)
1658 yaffsfs_SetError(-ENOENT);
1660 retVal = yaffsfs_DoStat(obj, buf);
1668 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1670 return yaffsfs_DoStatOrLStat(path, buf, 0);
1673 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1675 return yaffsfs_DoStatOrLStat(path, buf, 1);
1678 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1680 struct yaffs_obj *obj;
1685 yaffsfs_SetError(-EFAULT);
1690 obj = yaffsfs_HandleToObject(fd);
1693 retVal = yaffsfs_DoStat(obj, buf);
1696 yaffsfs_SetError(-EBADF);
1703 static int yaffsfs_DoUtime(struct yaffs_obj *obj,
1704 const struct yaffs_utimbuf *buf)
1709 struct yaffs_utimbuf local;
1711 obj = yaffs_get_equivalent_obj(obj);
1713 if (obj && obj->my_dev->read_only) {
1714 yaffsfs_SetError(-EROFS);
1719 local.actime = Y_CURRENT_TIME;
1720 local.modtime = local.actime;
1725 obj->yst_atime = buf->actime;
1726 obj->yst_mtime = buf->modtime;
1728 result = yaffs_flush_file(obj, 0, 0);
1729 retVal = result == YAFFS_OK ? 0 : -1;
1735 int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf)
1737 struct yaffs_obj *obj = NULL;
1738 struct yaffs_obj *dir = NULL;
1744 yaffsfs_SetError(-EFAULT);
1748 if (yaffsfs_CheckPath(path) < 0) {
1749 yaffsfs_SetError(-ENAMETOOLONG);
1755 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1758 yaffsfs_SetError(-ENOTDIR);
1760 yaffsfs_SetError(-ELOOP);
1761 else if (!dir || !obj)
1762 yaffsfs_SetError(-ENOENT);
1764 retVal = yaffsfs_DoUtime(obj, buf);
1772 int yaffs_futime(int fd, const struct yaffs_utimbuf *buf)
1774 struct yaffs_obj *obj;
1779 obj = yaffsfs_HandleToObject(fd);
1782 retVal = yaffsfs_DoUtime(obj, buf);
1785 yaffsfs_SetError(-EBADF);
1792 #ifndef CONFIG_YAFFS_WINCE
1793 /* xattrib functions */
1795 static int yaffs_do_setxattr(const YCHAR *path, const char *name,
1796 const void *data, int size, int flags, int follow)
1798 struct yaffs_obj *obj;
1799 struct yaffs_obj *dir;
1805 if (!path || !name || !data) {
1806 yaffsfs_SetError(-EFAULT);
1810 if (yaffsfs_CheckPath(path) < 0) {
1811 yaffsfs_SetError(-ENAMETOOLONG);
1817 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1820 obj = yaffsfs_FollowLink(obj, 0, &loop);
1823 yaffsfs_SetError(-ENOTDIR);
1825 yaffsfs_SetError(-ELOOP);
1826 else if (!dir || !obj)
1827 yaffsfs_SetError(-ENOENT);
1829 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
1831 yaffsfs_SetError(retVal);
1842 int yaffs_setxattr(const YCHAR *path, const char *name,
1843 const void *data, int size, int flags)
1845 return yaffs_do_setxattr(path, name, data, size, flags, 1);
1848 int yaffs_lsetxattr(const YCHAR *path, const char *name,
1849 const void *data, int size, int flags)
1851 return yaffs_do_setxattr(path, name, data, size, flags, 0);
1854 int yaffs_fsetxattr(int fd, const char *name,
1855 const void *data, int size, int flags)
1857 struct yaffs_obj *obj;
1861 if (!name || !data) {
1862 yaffsfs_SetError(-EFAULT);
1867 obj = yaffsfs_HandleToObject(fd);
1870 yaffsfs_SetError(-EBADF);
1872 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
1874 yaffsfs_SetError(retVal);
1884 static int yaffs_do_getxattr(const YCHAR *path, const char *name,
1885 void *data, int size, int follow)
1887 struct yaffs_obj *obj;
1888 struct yaffs_obj *dir;
1893 if (!path || !name || !data) {
1894 yaffsfs_SetError(-EFAULT);
1898 if (yaffsfs_CheckPath(path) < 0) {
1899 yaffsfs_SetError(-ENAMETOOLONG);
1905 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1908 obj = yaffsfs_FollowLink(obj, 0, &loop);
1911 yaffsfs_SetError(-ENOTDIR);
1913 yaffsfs_SetError(-ELOOP);
1914 else if (!dir || !obj)
1915 yaffsfs_SetError(-ENOENT);
1917 retVal = yaffs_get_xattrib(obj, name, data, size);
1919 yaffsfs_SetError(retVal);
1929 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
1931 return yaffs_do_getxattr(path, name, data, size, 1);
1934 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
1936 return yaffs_do_getxattr(path, name, data, size, 0);
1939 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
1941 struct yaffs_obj *obj;
1945 if (!name || !data) {
1946 yaffsfs_SetError(-EFAULT);
1951 obj = yaffsfs_HandleToObject(fd);
1954 retVal = yaffs_get_xattrib(obj, name, data, size);
1956 yaffsfs_SetError(retVal);
1961 yaffsfs_SetError(-EBADF);
1968 static int yaffs_do_listxattr(const YCHAR *path, char *data,
1969 int size, int follow)
1971 struct yaffs_obj *obj = NULL;
1972 struct yaffs_obj *dir = NULL;
1977 if (!path || !data) {
1978 yaffsfs_SetError(-EFAULT);
1982 if (yaffsfs_CheckPath(path) < 0) {
1983 yaffsfs_SetError(-ENAMETOOLONG);
1989 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1992 obj = yaffsfs_FollowLink(obj, 0, &loop);
1995 yaffsfs_SetError(-ENOTDIR);
1997 yaffsfs_SetError(-ELOOP);
1998 else if (!dir || !obj)
1999 yaffsfs_SetError(-ENOENT);
2001 retVal = yaffs_list_xattrib(obj, data, size);
2003 yaffsfs_SetError(retVal);
2014 int yaffs_listxattr(const YCHAR *path, char *data, int size)
2016 return yaffs_do_listxattr(path, data, size, 1);
2019 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
2021 return yaffs_do_listxattr(path, data, size, 0);
2024 int yaffs_flistxattr(int fd, char *data, int size)
2026 struct yaffs_obj *obj;
2031 yaffsfs_SetError(-EFAULT);
2036 obj = yaffsfs_HandleToObject(fd);
2039 retVal = yaffs_list_xattrib(obj, data, size);
2041 yaffsfs_SetError(retVal);
2046 yaffsfs_SetError(-EBADF);
2053 static int yaffs_do_removexattr(const YCHAR *path, const char *name,
2056 struct yaffs_obj *obj = NULL;
2057 struct yaffs_obj *dir = NULL;
2062 if (!path || !name) {
2063 yaffsfs_SetError(-EFAULT);
2067 if (yaffsfs_CheckPath(path) < 0) {
2068 yaffsfs_SetError(-ENAMETOOLONG);
2074 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2077 obj = yaffsfs_FollowLink(obj, 0, &loop);
2080 yaffsfs_SetError(-ENOTDIR);
2082 yaffsfs_SetError(-ELOOP);
2083 else if (!dir || !obj)
2084 yaffsfs_SetError(-ENOENT);
2086 retVal = yaffs_remove_xattrib(obj, name);
2088 yaffsfs_SetError(retVal);
2099 int yaffs_removexattr(const YCHAR *path, const char *name)
2101 return yaffs_do_removexattr(path, name, 1);
2104 int yaffs_lremovexattr(const YCHAR *path, const char *name)
2106 return yaffs_do_removexattr(path, name, 0);
2109 int yaffs_fremovexattr(int fd, const char *name)
2111 struct yaffs_obj *obj;
2116 yaffsfs_SetError(-EFAULT);
2121 obj = yaffsfs_HandleToObject(fd);
2124 retVal = yaffs_remove_xattrib(obj, name);
2126 yaffsfs_SetError(retVal);
2131 yaffsfs_SetError(-EBADF);
2139 #ifdef CONFIG_YAFFS_WINCE
2140 int yaffs_get_wince_times(int fd, unsigned *wctime,
2141 unsigned *watime, unsigned *wmtime)
2143 struct yaffs_obj *obj;
2148 obj = yaffsfs_HandleToObject(fd);
2153 wctime[0] = obj->win_ctime[0];
2154 wctime[1] = obj->win_ctime[1];
2157 watime[0] = obj->win_atime[0];
2158 watime[1] = obj->win_atime[1];
2161 wmtime[0] = obj->win_mtime[0];
2162 wmtime[1] = obj->win_mtime[1];
2168 yaffsfs_SetError(-EBADF);
2175 int yaffs_set_wince_times(int fd,
2176 const unsigned *wctime,
2177 const unsigned *watime, const unsigned *wmtime)
2179 struct yaffs_obj *obj;
2184 obj = yaffsfs_HandleToObject(fd);
2189 obj->win_ctime[0] = wctime[0];
2190 obj->win_ctime[1] = wctime[1];
2193 obj->win_atime[0] = watime[0];
2194 obj->win_atime[1] = watime[1];
2197 obj->win_mtime[0] = wmtime[0];
2198 obj->win_mtime[1] = wmtime[1];
2202 result = yaffs_flush_file(obj, 0, 0);
2206 yaffsfs_SetError(-EBADF);
2215 static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode)
2220 obj = yaffs_get_equivalent_obj(obj);
2223 obj->yst_mode = mode;
2225 result = yaffs_flush_file(obj, 0, 0);
2228 return result == YAFFS_OK ? 0 : -1;
2231 int yaffs_access(const YCHAR *path, int amode)
2233 struct yaffs_obj *obj = NULL;
2234 struct yaffs_obj *dir = NULL;
2240 yaffsfs_SetError(-EFAULT);
2244 if (yaffsfs_CheckPath(path) < 0) {
2245 yaffsfs_SetError(-ENAMETOOLONG);
2249 if (amode & ~(R_OK | W_OK | X_OK)) {
2250 yaffsfs_SetError(-EINVAL);
2256 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2257 obj = yaffsfs_FollowLink(obj, 0, &loop);
2260 yaffsfs_SetError(-ENOTDIR);
2262 yaffsfs_SetError(-ELOOP);
2263 else if (!dir || !obj)
2264 yaffsfs_SetError(-ENOENT);
2265 else if ((amode & W_OK) && obj->my_dev->read_only)
2266 yaffsfs_SetError(-EROFS);
2270 if ((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2272 if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2274 if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2278 yaffsfs_SetError(-EACCES);
2289 int yaffs_chmod(const YCHAR *path, mode_t mode)
2291 struct yaffs_obj *obj = NULL;
2292 struct yaffs_obj *dir = NULL;
2298 yaffsfs_SetError(-EFAULT);
2302 if (yaffsfs_CheckPath(path) < 0) {
2303 yaffsfs_SetError(-ENAMETOOLONG);
2307 if (mode & ~(0777)) {
2308 yaffsfs_SetError(-EINVAL);
2314 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2315 obj = yaffsfs_FollowLink(obj, 0, &loop);
2318 yaffsfs_SetError(-ENOTDIR);
2320 yaffsfs_SetError(-ELOOP);
2321 else if (!dir || !obj)
2322 yaffsfs_SetError(-ENOENT);
2323 else if (obj->my_dev->read_only)
2324 yaffsfs_SetError(-EROFS);
2326 retVal = yaffsfs_DoChMod(obj, mode);
2334 int yaffs_fchmod(int fd, mode_t mode)
2336 struct yaffs_obj *obj;
2339 if (mode & ~(0777)) {
2340 yaffsfs_SetError(-EINVAL);
2345 obj = yaffsfs_HandleToObject(fd);
2348 yaffsfs_SetError(-EBADF);
2349 else if (obj->my_dev->read_only)
2350 yaffsfs_SetError(-EROFS);
2352 retVal = yaffsfs_DoChMod(obj, mode);
2359 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2361 struct yaffs_obj *parent = NULL;
2362 struct yaffs_obj *dir = NULL;
2364 YCHAR *alt_path = NULL;
2370 yaffsfs_SetError(-EFAULT);
2374 if (yaffsfs_CheckPath(path) < 0) {
2375 yaffsfs_SetError(-ENAMETOOLONG);
2379 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2380 yaffsfs_SetError(-ENOMEM);
2387 parent = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop);
2388 if (!parent && notDir)
2389 yaffsfs_SetError(-ENOTDIR);
2391 yaffsfs_SetError(-ELOOP);
2393 yaffsfs_SetError(-ENOENT);
2394 else if (yaffsfs_TooManyObjects(parent->my_dev))
2395 yaffsfs_SetError(-ENFILE);
2396 else if (yaffs_strnlen(name, 5) == 0) {
2397 /* Trying to make the root itself */
2398 yaffsfs_SetError(-EEXIST);
2399 } else if (parent->my_dev->read_only)
2400 yaffsfs_SetError(-EROFS);
2402 dir = yaffs_create_dir(parent, name, mode, 0, 0);
2405 else if (yaffs_find_by_name(parent, name))
2406 yaffsfs_SetError(-EEXIST); /* name exists */
2408 yaffsfs_SetError(-ENOSPC); /* assume no space */
2418 int yaffs_rmdir(const YCHAR *path)
2424 yaffsfs_SetError(-EFAULT);
2428 if (yaffsfs_CheckPath(path) < 0) {
2429 yaffsfs_SetError(-ENAMETOOLONG);
2433 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2434 yaffsfs_SetError(-ENOMEM);
2439 result = yaffsfs_DoUnlink(path, 1);
2446 void *yaffs_getdev(const YCHAR *path)
2448 struct yaffs_dev *dev = NULL;
2450 dev = yaffsfs_FindDevice(path, &dummy);
2454 int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt)
2457 int result = YAFFS_FAIL;
2458 struct yaffs_dev *dev = NULL;
2461 yaffsfs_SetError(-EFAULT);
2465 yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path);
2467 if (yaffsfs_CheckPath(path) < 0) {
2468 yaffsfs_SetError(-ENAMETOOLONG);
2474 yaffsfs_InitHandles();
2476 dev = yaffsfs_FindMountPoint(path);
2478 if (!dev->is_mounted) {
2479 dev->read_only = read_only ? 1 : 0;
2481 u8 skip = dev->param.skip_checkpt_rd;
2482 dev->param.skip_checkpt_rd = 1;
2483 result = yaffs_guts_initialise(dev);
2484 dev->param.skip_checkpt_rd = skip;
2486 result = yaffs_guts_initialise(dev);
2489 if (result == YAFFS_FAIL)
2490 yaffsfs_SetError(-ENOMEM);
2491 retVal = result ? 0 : -1;
2494 yaffsfs_SetError(-EBUSY);
2496 yaffsfs_SetError(-ENODEV);
2503 int yaffs_mount2(const YCHAR *path, int readonly)
2505 return yaffs_mount_common(path, readonly, 0);
2508 int yaffs_mount(const YCHAR *path)
2510 return yaffs_mount_common(path, 0, 0);
2513 int yaffs_sync(const YCHAR *path)
2516 struct yaffs_dev *dev = NULL;
2520 yaffsfs_SetError(-EFAULT);
2524 if (yaffsfs_CheckPath(path) < 0) {
2525 yaffsfs_SetError(-ENAMETOOLONG);
2530 dev = yaffsfs_FindDevice(path, &dummy);
2532 if (!dev->is_mounted)
2533 yaffsfs_SetError(-EINVAL);
2534 else if (dev->read_only)
2535 yaffsfs_SetError(-EROFS);
2538 yaffs_flush_whole_cache(dev);
2539 yaffs_checkpoint_save(dev);
2544 yaffsfs_SetError(-ENODEV);
2550 static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
2553 struct yaffs_obj *obj;
2555 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
2556 obj = yaffsfs_HandleToObject(i);
2557 if (obj && obj->my_dev == dev)
2563 int yaffs_remount(const YCHAR *path, int force, int read_only)
2566 struct yaffs_dev *dev = NULL;
2569 yaffsfs_SetError(-EFAULT);
2573 if (yaffsfs_CheckPath(path) < 0) {
2574 yaffsfs_SetError(-ENAMETOOLONG);
2579 dev = yaffsfs_FindMountPoint(path);
2581 if (dev->is_mounted) {
2582 yaffs_flush_whole_cache(dev);
2584 if (force || !yaffsfs_IsDevBusy(dev)) {
2586 yaffs_checkpoint_save(dev);
2587 dev->read_only = read_only ? 1 : 0;
2590 yaffsfs_SetError(-EBUSY);
2593 yaffsfs_SetError(-EINVAL);
2596 yaffsfs_SetError(-ENODEV);
2603 int yaffs_unmount2(const YCHAR *path, int force)
2606 struct yaffs_dev *dev = NULL;
2609 yaffsfs_SetError(-EFAULT);
2613 if (yaffsfs_CheckPath(path) < 0) {
2614 yaffsfs_SetError(-ENAMETOOLONG);
2619 dev = yaffsfs_FindMountPoint(path);
2621 if (dev->is_mounted) {
2623 yaffs_flush_whole_cache(dev);
2624 yaffs_checkpoint_save(dev);
2625 inUse = yaffsfs_IsDevBusy(dev);
2626 if (!inUse || force) {
2628 yaffsfs_BreakDeviceHandles(dev);
2629 yaffs_deinitialise(dev);
2633 yaffsfs_SetError(-EBUSY);
2636 yaffsfs_SetError(-EINVAL);
2639 yaffsfs_SetError(-ENODEV);
2646 int yaffs_unmount(const YCHAR *path)
2648 return yaffs_unmount2(path, 0);
2651 loff_t yaffs_freespace(const YCHAR *path)
2654 struct yaffs_dev *dev = NULL;
2658 yaffsfs_SetError(-EFAULT);
2662 if (yaffsfs_CheckPath(path) < 0) {
2663 yaffsfs_SetError(-ENAMETOOLONG);
2668 dev = yaffsfs_FindDevice(path, &dummy);
2669 if (dev && dev->is_mounted) {
2670 retVal = yaffs_get_n_free_chunks(dev);
2671 retVal *= dev->data_bytes_per_chunk;
2674 yaffsfs_SetError(-EINVAL);
2680 loff_t yaffs_totalspace(const YCHAR *path)
2683 struct yaffs_dev *dev = NULL;
2687 yaffsfs_SetError(-EFAULT);
2691 if (yaffsfs_CheckPath(path) < 0) {
2692 yaffsfs_SetError(-ENAMETOOLONG);
2697 dev = yaffsfs_FindDevice(path, &dummy);
2698 if (dev && dev->is_mounted) {
2699 retVal = (dev->param.end_block - dev->param.start_block + 1) -
2700 dev->param.n_reserved_blocks;
2701 retVal *= dev->param.chunks_per_block;
2702 retVal *= dev->data_bytes_per_chunk;
2705 yaffsfs_SetError(-EINVAL);
2711 int yaffs_inodecount(const YCHAR *path)
2714 struct yaffs_dev *dev = NULL;
2718 yaffsfs_SetError(-EFAULT);
2722 if (yaffsfs_CheckPath(path) < 0) {
2723 yaffsfs_SetError(-ENAMETOOLONG);
2728 dev = yaffsfs_FindDevice(path, &dummy);
2729 if (dev && dev->is_mounted) {
2730 int n_obj = dev->n_obj;
2731 if (n_obj > dev->n_hardlinks)
2732 retVal = n_obj - dev->n_hardlinks;
2736 yaffsfs_SetError(-EINVAL);
2742 void yaffs_add_device(struct yaffs_dev *dev)
2744 struct list_head *cfg;
2745 /* First check that the device is not in the list. */
2747 list_for_each(cfg, &yaffsfs_deviceList) {
2748 if (dev == list_entry(cfg, struct yaffs_dev, dev_list))
2752 dev->is_mounted = 0;
2753 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
2755 if (!dev->dev_list.next)
2756 INIT_LIST_HEAD(&dev->dev_list);
2758 list_add(&dev->dev_list, &yaffsfs_deviceList);
2761 void yaffs_remove_device(struct yaffs_dev *dev)
2763 list_del_init(&dev->dev_list);
2766 /* Functions to iterate through devices. NB Use with extreme care! */
2768 static struct list_head *dev_iterator;
2769 void yaffs_dev_rewind(void)
2771 dev_iterator = yaffsfs_deviceList.next;
2774 struct yaffs_dev *yaffs_next_dev(void)
2776 struct yaffs_dev *retval;
2780 if (dev_iterator == &yaffsfs_deviceList)
2783 retval = list_entry(dev_iterator, struct yaffs_dev, dev_list);
2784 dev_iterator = dev_iterator->next;
2788 /* Directory search stuff. */
2790 static struct list_head search_contexts;
2792 static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc)
2796 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
2800 if (list_empty(&dsc->dirObj->variant.dir_variant.children))
2801 dsc->nextReturn = NULL;
2804 list_entry(dsc->dirObj->variant.dir_variant.
2805 children.next, struct yaffs_obj,
2808 /* Hey someone isn't playing nice! */
2812 static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc)
2816 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
2818 if (dsc->nextReturn == NULL ||
2819 list_empty(&dsc->dirObj->variant.dir_variant.children))
2820 dsc->nextReturn = NULL;
2822 struct list_head *next = dsc->nextReturn->siblings.next;
2824 if (next == &dsc->dirObj->variant.dir_variant.children)
2825 dsc->nextReturn = NULL; /* end of list */
2827 dsc->nextReturn = list_entry(next,
2832 /* Hey someone isn't playing nice! */
2836 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
2839 struct list_head *i;
2840 struct yaffsfs_DirSearchContxt *dsc;
2842 /* if search contexts not initilised then skip */
2843 if (!search_contexts.next)
2846 /* Iterate through the directory search contexts.
2847 * If any are the one being removed, then advance the dsc to
2848 * the next one to prevent a hanging ptr.
2850 list_for_each(i, &search_contexts) {
2851 dsc = list_entry(i, struct yaffsfs_DirSearchContxt, others);
2852 if (dsc->nextReturn == obj)
2853 yaffsfs_DirAdvance(dsc);
2858 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
2860 yaffs_DIR *dir = NULL;
2861 struct yaffs_obj *obj = NULL;
2862 struct yaffsfs_DirSearchContxt *dsc = NULL;
2867 yaffsfs_SetError(-EFAULT);
2871 if (yaffsfs_CheckPath(dirname) < 0) {
2872 yaffsfs_SetError(-ENAMETOOLONG);
2878 obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, ¬Dir, &loop);
2881 yaffsfs_SetError(-ENOTDIR);
2883 yaffsfs_SetError(-ELOOP);
2885 yaffsfs_SetError(-ENOENT);
2886 else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
2887 yaffsfs_SetError(-ENOTDIR);
2891 for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) {
2892 if (!yaffsfs_dsc[i].inUse)
2893 dsc = &yaffsfs_dsc[i];
2896 dir = (yaffs_DIR *) dsc;
2899 memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt));
2902 yaffs_strncpy(dsc->name, dirname, NAME_MAX);
2903 INIT_LIST_HEAD(&dsc->others);
2905 if (!search_contexts.next)
2906 INIT_LIST_HEAD(&search_contexts);
2908 list_add(&dsc->others, &search_contexts);
2909 yaffsfs_SetDirRewound(dsc);
2919 struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp)
2921 struct yaffsfs_DirSearchContxt *dsc;
2922 struct yaffs_dirent *retVal = NULL;
2924 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2927 if (dsc && dsc->inUse) {
2928 yaffsfs_SetError(0);
2929 if (dsc->nextReturn) {
2931 yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
2932 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
2933 dsc->de.d_off = dsc->offset++;
2934 yaffs_get_obj_name(dsc->nextReturn,
2935 dsc->de.d_name, NAME_MAX);
2936 if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) {
2937 /* this should not happen! */
2938 yaffs_strcpy(dsc->de.d_name, _Y("zz"));
2940 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
2942 yaffsfs_DirAdvance(dsc);
2946 yaffsfs_SetError(-EBADF);
2954 void yaffs_rewinddir(yaffs_DIR *dirp)
2956 struct yaffsfs_DirSearchContxt *dsc;
2958 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2962 yaffsfs_SetDirRewound(dsc);
2967 int yaffs_closedir(yaffs_DIR *dirp)
2969 struct yaffsfs_DirSearchContxt *dsc;
2971 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2974 yaffsfs_SetError(-EFAULT);
2980 list_del(&dsc->others); /* unhook from list */
2985 /* End of directory stuff */
2987 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
2989 struct yaffs_obj *parent = NULL;
2990 struct yaffs_obj *obj;
2993 int mode = 0; /* ignore for now */
2997 if (!oldpath || !newpath) {
2998 yaffsfs_SetError(-EFAULT);
3002 if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3003 yaffsfs_SetError(-ENAMETOOLONG);
3008 parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, ¬Dir, &loop);
3009 if (!parent && notDir)
3010 yaffsfs_SetError(-ENOTDIR);
3012 yaffsfs_SetError(-ELOOP);
3013 else if (!parent || yaffs_strnlen(name, 5) < 1)
3014 yaffsfs_SetError(-ENOENT);
3015 else if (yaffsfs_TooManyObjects(parent->my_dev))
3016 yaffsfs_SetError(-ENFILE);
3017 else if (parent->my_dev->read_only)
3018 yaffsfs_SetError(-EROFS);
3020 obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath);
3023 else if (yaffsfs_FindObject
3024 (NULL, newpath, 0, 0, NULL, NULL, NULL))
3025 yaffsfs_SetError(-EEXIST);
3027 yaffsfs_SetError(-ENOSPC);
3036 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
3038 struct yaffs_obj *obj = NULL;
3039 struct yaffs_obj *dir = NULL;
3044 if (!path || !buf) {
3045 yaffsfs_SetError(-EFAULT);
3051 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
3054 yaffsfs_SetError(-ENOTDIR);
3056 yaffsfs_SetError(-ELOOP);
3057 else if (!dir || !obj)
3058 yaffsfs_SetError(-ENOENT);
3059 else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
3060 yaffsfs_SetError(-EINVAL);
3062 YCHAR *alias = obj->variant.symlink_variant.alias;
3063 memset(buf, 0, bufsiz);
3064 yaffs_strncpy(buf, alias, bufsiz - 1);
3071 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
3073 /* Creates a link called newpath to existing oldpath */
3074 struct yaffs_obj *obj = NULL;
3075 struct yaffs_obj *lnk = NULL;
3076 struct yaffs_obj *obj_dir = NULL;
3077 struct yaffs_obj *lnk_dir = NULL;
3085 if (!oldpath || !linkpath) {
3086 yaffsfs_SetError(-EFAULT);
3090 if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3091 yaffsfs_SetError(-ENAMETOOLONG);
3097 obj = yaffsfs_FindObject(NULL, oldpath, 0, 1,
3098 &obj_dir, ¬DirObj, &objLoop);
3099 lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL);
3100 lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname,
3101 0, ¬DirLnk, &lnkLoop);
3103 if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
3104 yaffsfs_SetError(-ENOTDIR);
3105 else if (objLoop || lnkLoop)
3106 yaffsfs_SetError(-ELOOP);
3107 else if (!obj_dir || !lnk_dir || !obj)
3108 yaffsfs_SetError(-ENOENT);
3109 else if (obj->my_dev->read_only)
3110 yaffsfs_SetError(-EROFS);
3111 else if (yaffsfs_TooManyObjects(obj->my_dev))
3112 yaffsfs_SetError(-ENFILE);
3114 yaffsfs_SetError(-EEXIST);
3115 else if (lnk_dir->my_dev != obj->my_dev)
3116 yaffsfs_SetError(-EXDEV);
3118 retVal = yaffsfs_CheckNameLength(newname);
3121 lnk = yaffs_link_obj(lnk_dir, newname, obj);
3125 yaffsfs_SetError(-ENOSPC);
3135 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
3137 yaffsfs_SetError(-EINVAL);
3142 * D E B U G F U N C T I O N S
3147 * Returns number of handles attached to the object
3149 int yaffs_n_handles(const YCHAR *path)
3151 struct yaffs_obj *obj;
3154 yaffsfs_SetError(-EFAULT);
3158 if (yaffsfs_CheckPath(path) < 0) {
3159 yaffsfs_SetError(-ENAMETOOLONG);
3163 obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
3166 return yaffsfs_CountHandles(obj);
3171 int yaffs_get_error(void)
3173 return yaffsfs_GetLastError();
3176 int yaffs_set_error(int error)
3178 yaffsfs_SetError(error);
3182 int yaffs_dump_dev(const YCHAR *path)
3187 struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest);
3190 struct yaffs_dev *dev = obj->my_dev;
3193 "n_page_writes.......... %d\n"
3194 "n_page_reads........... %d\n"
3195 "n_erasures....... %d\n"
3196 "n_gc_copies............ %d\n"
3197 "garbageCollections... %d\n"
3198 "passiveGarbageColl'ns %d\n"
3204 dev->garbageCollections, dev->passiveGarbageCollections);