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"
21 #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
24 #define NULL ((void *)0)
27 /* YAFFSFS_RW_SIZE must be a power of 2 */
28 #define YAFFSFS_RW_SHIFT (13)
29 #define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT)
31 /* Some forward references */
32 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
34 int symDepth, int getEquiv,
35 struct yaffs_obj **dirOut,
36 int *notDir, int *loop);
38 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
40 unsigned int yaffs_wr_attempts;
44 * There are open inodes in struct yaffsfs_Inode.
45 * There are open file descriptors in yaffsfs_FileDes.
46 * There are open handles in yaffsfs_FileDes.
48 * Things are structured this way to be like the Linux VFS model
49 * so that interactions with the yaffs guts calls are similar.
50 * That means more common code paths and less special code.
51 * That means better testing etc.
53 * We have 3 layers because:
54 * A handle is different than an fd because you can use dup()
55 * to create a new handle that accesses the *same* fd. The two
56 * handles will use the same offset (part of the fd). We only close
57 * down the fd when there are no more handles accessing it.
59 * More than one fd can currently access one file, but each fd
60 * has its own permsiions and offset.
63 struct yaffsfs_Inode {
64 int count; /* Number of handles accessing this inode */
65 struct yaffs_obj *iObj;
68 struct yaffsfs_FileDes {
74 int inodeId:12; /* Index to corresponding yaffsfs_Inode */
75 int handleCount:10; /* Number of handles for this fd */
76 loff_t position; /* current position in file */
79 struct yaffsfs_Handle {
85 struct yaffsfs_DirSearchContxt {
86 struct yaffs_dirent de; /* directory entry */
87 YCHAR name[NAME_MAX + 1]; /* name of directory being searched */
88 struct yaffs_obj *dirObj; /* ptr to directory being searched */
89 struct yaffs_obj *nextReturn; /* obj returned by next readddir */
90 struct list_head others;
95 static struct yaffsfs_DirSearchContxt yaffsfs_dsc[YAFFSFS_N_DSC];
96 static struct yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
97 static struct yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
98 static struct yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
100 static int yaffsfs_handlesInitialised;
102 unsigned yaffs_set_trace(unsigned tm)
104 yaffs_trace_mask = tm;
105 return yaffs_trace_mask;
108 unsigned yaffs_get_trace(void)
110 return yaffs_trace_mask;
115 * Inilitalise handle management on start-up.
118 static void yaffsfs_InitHandles(void)
121 if (yaffsfs_handlesInitialised)
124 memset(yaffsfs_inode, 0, sizeof(yaffsfs_inode));
125 memset(yaffsfs_fd, 0, sizeof(yaffsfs_fd));
126 memset(yaffsfs_handle, 0, sizeof(yaffsfs_handle));
127 memset(yaffsfs_dsc, 0, sizeof(yaffsfs_dsc));
129 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
130 yaffsfs_fd[i].inodeId = -1;
131 for (i = 0; i < YAFFSFS_N_HANDLES; i++)
132 yaffsfs_handle[i].fdId = -1;
135 static struct yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
137 if (h >= 0 && h < YAFFSFS_N_HANDLES)
138 return &yaffsfs_handle[h];
142 static struct yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
144 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
146 if (h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
147 return &yaffsfs_fd[h->fdId];
152 static struct yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
154 struct yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
156 if (fd && fd->handleCount > 0 &&
157 fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
158 return &yaffsfs_inode[fd->inodeId];
163 static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
165 struct yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
174 * yaffsfs_FindInodeIdForObject
175 * Find the inode entry for an object, if it exists.
178 static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
184 obj = yaffs_get_equivalent_obj(obj);
186 /* Look for it in open inode table */
187 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
188 if (yaffsfs_inode[i].iObj == obj)
195 * yaffsfs_GetInodeIdForObject
196 * Grab an inode entry when opening a new inode.
198 static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
202 struct yaffsfs_Inode *in = NULL;
205 obj = yaffs_get_equivalent_obj(obj);
207 ret = yaffsfs_FindInodeIdForObject(obj);
209 for (i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++) {
210 if (!yaffsfs_inode[i].iObj)
215 in = &yaffsfs_inode[ret];
225 static int yaffsfs_CountHandles(struct yaffs_obj *obj)
227 int i = yaffsfs_FindInodeIdForObject(obj);
230 return yaffsfs_inode[i].count;
235 static void yaffsfs_ReleaseInode(struct yaffsfs_Inode *in)
237 struct yaffs_obj *obj;
244 obj->my_inode = NULL;
249 static void yaffsfs_PutInode(int inodeId)
251 if (inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES) {
252 struct yaffsfs_Inode *in = &yaffsfs_inode[inodeId];
254 if (in->count <= 0) {
255 yaffsfs_ReleaseInode(in);
261 static int yaffsfs_NewHandle(struct yaffsfs_Handle **hptr)
264 struct yaffsfs_Handle *h;
266 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
267 h = &yaffsfs_handle[i];
268 if (h->useCount < 1) {
269 memset(h, 0, sizeof(struct yaffsfs_Handle));
280 static int yaffsfs_NewHandleAndFileDes(void)
283 struct yaffsfs_FileDes *fd;
284 struct yaffsfs_Handle *h = NULL;
285 int handle = yaffsfs_NewHandle(&h);
290 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
292 if (fd->handleCount < 1) {
293 memset(fd, 0, sizeof(struct yaffsfs_FileDes));
301 /* Dump the handle because we could not get a fd */
308 * Increase use of handle when reading/writing a file
309 * Also gets the file descriptor.
312 static int yaffsfs_GetHandle(int handle)
314 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
316 if (h && h->useCount > 0) {
325 * Let go of a handle when closing a file or aborting an open or
326 * ending a read or write.
329 static int yaffsfs_PutFileDes(int fdId)
331 struct yaffsfs_FileDes *fd;
333 if (fdId >= 0 && fdId < YAFFSFS_N_HANDLES) {
334 fd = &yaffsfs_fd[fdId];
336 if (fd->handleCount < 1) {
337 if (fd->inodeId >= 0) {
338 yaffsfs_PutInode(fd->inodeId);
346 static int yaffsfs_PutHandle(int handle)
348 struct yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
350 if (h && h->useCount > 0) {
352 if (h->useCount < 1) {
353 yaffsfs_PutFileDes(h->fdId);
361 static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
363 struct yaffsfs_FileDes *fd;
364 struct yaffsfs_Handle *h;
365 struct yaffs_obj *obj;
367 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
368 h = yaffsfs_HandleToPointer(i);
369 fd = yaffsfs_HandleToFileDes(i);
370 obj = yaffsfs_HandleToObject(i);
371 if (h && h->useCount > 0) {
375 if (fd && fd->handleCount > 0 && obj && obj->my_dev == dev) {
377 yaffsfs_PutInode(fd->inodeId);
384 * Stuff to handle names.
386 #ifdef CONFIG_YAFFS_CASE_INSENSITIVE
388 static int yaffs_toupper(YCHAR a)
390 if (a >= 'a' && a <= 'z')
391 return (a - 'a') + 'A';
396 int yaffsfs_Match(YCHAR a, YCHAR b)
398 return (yaffs_toupper(a) == yaffs_toupper(b));
401 int yaffsfs_Match(YCHAR a, YCHAR b)
408 int yaffsfs_IsPathDivider(YCHAR ch)
410 const YCHAR *str = YAFFS_PATH_DIVIDERS;
421 int yaffsfs_CheckNameLength(const char *name)
425 int nameLength = yaffs_strnlen(name, YAFFS_MAX_NAME_LENGTH + 1);
427 if (nameLength == 0) {
428 yaffsfs_SetError(-ENOENT);
430 } else if (nameLength > YAFFS_MAX_NAME_LENGTH) {
431 yaffsfs_SetError(-ENAMETOOLONG);
438 static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
440 YCHAR *alt_path = NULL;
445 * We don't have a definition for max path length.
446 * We will use 3 * max name length instead.
449 path_length = yaffs_strnlen(path, (YAFFS_MAX_NAME_LENGTH + 1) * 3 + 1);
451 /* If the last character is a path divider, then we need to
452 * trim it back so that the name look-up works properly.
453 * eg. /foo/new_dir/ -> /foo/newdir
454 * Curveball: Need to handle multiple path dividers:
455 * eg. /foof/sdfse///// -> /foo/sdfse
457 if (path_length > 0 && yaffsfs_IsPathDivider(path[path_length - 1])) {
458 alt_path = kmalloc(path_length + 1, 0);
461 yaffs_strcpy(alt_path, path);
462 for (i = path_length - 1;
463 i >= 0 && yaffsfs_IsPathDivider(alt_path[i]); i--)
464 alt_path[i] = (YCHAR) 0;
466 *ret_path = alt_path;
470 LIST_HEAD(yaffsfs_deviceList);
475 * Scan the configuration list to find the device
476 * Curveballs: Should match paths that end in '/' too
477 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
479 static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path,
482 struct list_head *cfg;
483 const YCHAR *leftOver;
485 struct yaffs_dev *retval = NULL;
486 struct yaffs_dev *dev = NULL;
488 int longestMatch = -1;
492 * Check all configs, choose the one that:
493 * 1) Actually matches a prefix (ie /a amd /abc will not match
494 * 2) Matches the longest.
496 list_for_each(cfg, &yaffsfs_deviceList) {
497 dev = list_entry(cfg, struct yaffs_dev, dev_list);
503 while (matching && *p && *leftOver) {
504 /* Skip over any /s */
505 while (yaffsfs_IsPathDivider(*p))
508 /* Skip over any /s */
509 while (yaffsfs_IsPathDivider(*leftOver))
512 /* Now match the text part */
514 *p && !yaffsfs_IsPathDivider(*p) &&
515 *leftOver && !yaffsfs_IsPathDivider(*leftOver)) {
516 if (yaffsfs_Match(*p, *leftOver)) {
526 /* Skip over any /s in leftOver */
527 while (yaffsfs_IsPathDivider(*leftOver))
530 /*Skip over any /s in p */
531 while (yaffsfs_IsPathDivider(*p))
534 /* p should now be at the end of the string if fully matched */
538 if (matching && (thisMatchLength > longestMatch)) {
540 *restOfPath = (YCHAR *) leftOver;
542 longestMatch = thisMatchLength;
549 static int yaffsfs_CheckPath(const YCHAR *path)
554 while (*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100) {
555 if (yaffsfs_IsPathDivider(*path)) {
563 return (*path) ? -1 : 0;
566 /* FindMountPoint only returns a dev entry if the path is a mount point */
567 static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
569 struct yaffs_dev *dev;
570 YCHAR *restOfPath = NULL;
572 dev = yaffsfs_FindDevice(path, &restOfPath);
573 if (dev && restOfPath && *restOfPath)
578 static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path,
581 struct yaffs_dev *dev;
583 dev = yaffsfs_FindDevice(path, restOfPath);
584 if (dev && dev->is_mounted)
585 return dev->root_dir;
590 static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
591 int symDepth, int *loop)
595 obj = yaffs_get_equivalent_obj(obj);
597 while (obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK) {
598 YCHAR *alias = obj->variant.symlink_variant.alias;
600 if (yaffsfs_IsPathDivider(*alias))
601 /* Starts with a /, need to scan from root up */
602 obj = yaffsfs_FindObject(NULL, alias, symDepth++,
603 1, NULL, NULL, loop);
606 * Relative to here so use the parent of the
609 obj = yaffsfs_FindObject(obj->parent, alias, symDepth++,
610 1, NULL, NULL, loop);
616 * yaffsfs_FindDirectory
617 * Parse a path to determine the directory and the name within the directory.
619 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
621 static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
623 YCHAR **name, int symDepth,
624 int *notDir, int *loop)
626 struct yaffs_obj *dir;
628 YCHAR str[YAFFS_MAX_NAME_LENGTH + 1];
631 if (symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES) {
639 restOfPath = (YCHAR *) path;
641 dir = yaffsfs_FindRoot(path, &restOfPath);
646 * curve ball: also throw away surplus '/'
647 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
649 while (yaffsfs_IsPathDivider(*restOfPath))
650 restOfPath++; /* get rid of '/' */
655 while (*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)) {
656 if (i < YAFFS_MAX_NAME_LENGTH) {
657 str[i] = *restOfPath;
665 /* got to the end of the string */
668 if (yaffs_strcmp(str, _Y(".")) == 0) {
670 } else if (yaffs_strcmp(str, _Y("..")) == 0) {
673 dir = yaffs_find_by_name(dir, str);
675 dir = yaffsfs_FollowLink(dir, symDepth, loop);
677 if (dir && dir->variant_type !=
678 YAFFS_OBJECT_TYPE_DIRECTORY) {
687 /* directory did not exist. */
691 static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
695 int *notDir, int *loop)
697 return yaffsfs_DoFindDirectory(relDir, path, name, symDepth, notDir,
702 * yaffsfs_FindObject turns a path for an existing object into the object
704 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
705 const YCHAR *path, int symDepth,
707 struct yaffs_obj **dirOut,
708 int *notDir, int *loop)
710 struct yaffs_obj *dir;
711 struct yaffs_obj *obj;
715 yaffsfs_FindDirectory(relDir, path, &name, symDepth, notDir, loop);
721 obj = yaffs_find_by_name(dir, name);
726 obj = yaffs_get_equivalent_obj(obj);
731 /*************************************************************************
732 * Start of yaffsfs visible functions.
733 *************************************************************************/
735 int yaffs_dup(int handle)
737 int newHandleNumber = -1;
738 struct yaffsfs_FileDes *existingFD = NULL;
739 struct yaffsfs_Handle *existingHandle = NULL;
740 struct yaffsfs_Handle *newHandle = NULL;
743 existingHandle = yaffsfs_HandleToPointer(handle);
744 existingFD = yaffsfs_HandleToFileDes(handle);
746 newHandleNumber = yaffsfs_NewHandle(&newHandle);
748 newHandle->fdId = existingHandle->fdId;
749 existingFD->handleCount++;
755 yaffsfs_SetError(-EBADF);
757 yaffsfs_SetError(-ENOMEM);
759 return newHandleNumber;
763 static int yaffsfs_TooManyObjects(struct yaffs_dev *dev)
765 int current_objects = dev->n_obj - dev->n_deleted_files;
767 if (dev->param.max_objects && current_objects > dev->param.max_objects)
773 int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
775 struct yaffs_obj *obj = NULL;
776 struct yaffs_obj *dir = NULL;
779 struct yaffsfs_FileDes *fd = NULL;
782 int errorReported = 0;
783 int rwflags = oflag & (O_RDWR | O_RDONLY | O_WRONLY);
784 u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
785 u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
786 u8 sharedReadAllowed;
787 u8 sharedWriteAllowed;
796 yaffsfs_SetError(-EFAULT);
800 if (yaffsfs_CheckPath(path) < 0) {
801 yaffsfs_SetError(-ENAMETOOLONG);
805 /* O_EXCL only has meaning if O_CREAT is specified */
806 if (!(oflag & O_CREAT))
809 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
810 if ((oflag & O_CREAT) & (oflag & O_EXCL))
813 /* Todo: Are there any more flag combos to sanitise ? */
815 /* Figure out if reading or writing is requested */
817 readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
818 writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
822 handle = yaffsfs_NewHandleAndFileDes();
825 yaffsfs_SetError(-ENFILE);
829 fd = yaffsfs_HandleToFileDes(handle);
831 /* try to find the exisiting object */
832 obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
834 obj = yaffsfs_FollowLink(obj, symDepth++, &loop);
837 obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
838 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
843 /* The file already exists or it might be a directory */
845 /* A directory can't be opened as a file */
846 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
848 yaffsfs_SetError(-EISDIR);
852 /* Open should fail if O_CREAT and O_EXCL are specified
853 * for a file that exists.
855 if (!errorReported &&
856 (oflag & O_EXCL) && (oflag & O_CREAT)) {
858 yaffsfs_SetError(-EEXIST);
862 /* Check file permissions */
863 if (readRequested && !(obj->yst_mode & S_IREAD))
866 if (writeRequested && !(obj->yst_mode & S_IWRITE))
869 if (!errorReported && writeRequested &&
870 obj->my_dev->read_only) {
872 yaffsfs_SetError(-EROFS);
876 if (openDenied && !errorReported) {
877 yaffsfs_SetError(-EACCES);
881 /* Check sharing of an existing object. */
883 struct yaffsfs_FileDes *fdx;
886 sharedReadAllowed = 1;
887 sharedWriteAllowed = 1;
890 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
891 fdx = &yaffsfs_fd[i];
892 if (fdx->handleCount > 0 &&
894 yaffsfs_inode[fdx->inodeId].iObj
897 sharedReadAllowed = 0;
898 if (!fdx->shareWrite)
899 sharedWriteAllowed = 0;
907 if ((!sharedReadAllowed && readRequested) ||
908 (!shareRead && alreadyReading) ||
909 (!sharedWriteAllowed && writeRequested) ||
910 (!shareWrite && alreadyWriting)) {
912 yaffsfs_SetError(-EBUSY);
919 /* If we could not open an existing object, then let's see if
920 * the directory exists. If not, error.
922 if (!obj && !errorReported) {
923 dir = yaffsfs_FindDirectory(NULL, path, &name, 0,
925 if (!dir && notDir) {
926 yaffsfs_SetError(-ENOTDIR);
929 yaffsfs_SetError(-ELOOP);
932 yaffsfs_SetError(-ENOENT);
937 if (!obj && dir && !errorReported && (oflag & O_CREAT)) {
938 /* Let's see if we can create this file */
939 if (dir->my_dev->read_only) {
940 yaffsfs_SetError(-EROFS);
942 } else if (yaffsfs_TooManyObjects(dir->my_dev)) {
943 yaffsfs_SetError(-ENFILE);
946 obj = yaffs_create_file(dir, name, mode, 0, 0);
948 if (!obj && !errorReported) {
949 yaffsfs_SetError(-ENOSPC);
954 if (!obj && dir && !errorReported && !(oflag & O_CREAT)) {
955 yaffsfs_SetError(-ENOENT);
959 if (obj && !openDenied) {
960 int inodeId = yaffsfs_GetInodeIdForObject(obj);
964 * Todo: Fix any problem if inodes run out,
965 * That can't happen if the number of inode
966 * items >= number of handles.
970 fd->inodeId = inodeId;
971 fd->reading = readRequested;
972 fd->writing = writeRequested;
973 fd->append = (oflag & O_APPEND) ? 1 : 0;
975 fd->shareRead = shareRead;
976 fd->shareWrite = shareWrite;
978 /* Hook inode to object */
979 obj->my_inode = (void *)&yaffsfs_inode[inodeId];
981 if ((oflag & O_TRUNC) && fd->writing)
982 yaffs_resize_file(obj, 0);
984 yaffsfs_PutHandle(handle);
986 yaffsfs_SetError(0); /* Problem */
996 int yaffs_open(const YCHAR *path, int oflag, int mode)
998 return yaffs_open_sharing(path, oflag, mode,
999 YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
1002 int yaffs_Dofsync(int handle, int datasync)
1005 struct yaffs_obj *obj;
1009 obj = yaffsfs_HandleToObject(handle);
1012 yaffsfs_SetError(-EBADF);
1013 else if (obj->my_dev->read_only)
1014 yaffsfs_SetError(-EROFS);
1016 yaffs_flush_file(obj, 1, datasync);
1025 int yaffs_fsync(int handle)
1027 return yaffs_Dofsync(handle, 0);
1030 int yaffs_flush(int handle)
1032 return yaffs_fsync(handle);
1035 int yaffs_fdatasync(int handle)
1037 return yaffs_Dofsync(handle, 1);
1040 int yaffs_close(int handle)
1042 struct yaffsfs_Handle *h = NULL;
1043 struct yaffs_obj *obj = NULL;
1048 h = yaffsfs_HandleToPointer(handle);
1049 obj = yaffsfs_HandleToObject(handle);
1052 yaffsfs_SetError(-EBADF);
1055 yaffs_flush_file(obj, 1, 0);
1056 yaffsfs_PutHandle(handle);
1065 int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte,
1066 int isPread, loff_t offset)
1068 struct yaffsfs_FileDes *fd = NULL;
1069 struct yaffs_obj *obj = NULL;
1071 loff_t startPos = 0;
1077 u8 *buf = (u8 *) vbuf;
1080 yaffsfs_SetError(-EFAULT);
1085 fd = yaffsfs_HandleToFileDes(handle);
1086 obj = yaffsfs_HandleToObject(handle);
1090 yaffsfs_SetError(-EBADF);
1092 } else if (!fd->reading) {
1093 /* Not a reading handle */
1094 yaffsfs_SetError(-EINVAL);
1096 } else if (nbyte > YAFFS_MAX_FILE_SIZE) {
1097 yaffsfs_SetError(-EINVAL);
1103 startPos = fd->position;
1107 if (yaffs_get_obj_length(obj) > pos)
1108 maxRead = yaffs_get_obj_length(obj) - pos;
1112 if (nbyte > maxRead)
1115 yaffsfs_GetHandle(handle);
1117 endPos = pos + nbyte;
1119 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1120 nbyte > YAFFS_MAX_FILE_SIZE ||
1121 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1127 nToRead = YAFFSFS_RW_SIZE -
1128 (pos & (YAFFSFS_RW_SIZE - 1));
1129 if (nToRead > nbyte)
1133 * Need to reverify object in case the device was
1134 * unmounted in another thread.
1136 obj = yaffsfs_HandleToObject(handle);
1140 nRead = yaffs_file_rd(obj, buf, pos, nToRead);
1148 if (nRead == nToRead)
1151 nbyte = 0; /* no more to read */
1160 yaffsfs_PutHandle(handle);
1164 fd->position = startPos + totalRead;
1166 yaffsfs_SetError(-EINVAL);
1173 return (totalRead >= 0) ? totalRead : -1;
1177 int yaffs_read(int handle, void *buf, unsigned int nbyte)
1179 return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
1182 int yaffs_pread(int handle, void *buf, unsigned int nbyte, loff_t offset)
1184 return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
1187 int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte,
1188 int isPwrite, loff_t offset)
1190 struct yaffsfs_FileDes *fd = NULL;
1191 struct yaffs_obj *obj = NULL;
1193 loff_t startPos = 0;
1196 int totalWritten = 0;
1197 int write_trhrough = 0;
1199 const u8 *buf = (const u8 *)vbuf;
1202 yaffsfs_SetError(-EFAULT);
1207 fd = yaffsfs_HandleToFileDes(handle);
1208 obj = yaffsfs_HandleToObject(handle);
1212 yaffsfs_SetError(-EBADF);
1214 } else if (!fd->writing) {
1215 yaffsfs_SetError(-EINVAL);
1217 } else if (obj->my_dev->read_only) {
1218 yaffsfs_SetError(-EROFS);
1222 startPos = yaffs_get_obj_length(obj);
1226 startPos = fd->position;
1228 yaffsfs_GetHandle(handle);
1230 endPos = pos + nbyte;
1232 if (pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1233 nbyte > YAFFS_MAX_FILE_SIZE ||
1234 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE) {
1241 nToWrite = YAFFSFS_RW_SIZE -
1242 (pos & (YAFFSFS_RW_SIZE - 1));
1243 if (nToWrite > nbyte)
1247 * Need to reverify object in case the device was
1248 * remounted or unmounted in another thread.
1250 obj = yaffsfs_HandleToObject(handle);
1251 if (!obj || obj->my_dev->read_only)
1255 yaffs_wr_file(obj, buf, pos, nToWrite,
1258 totalWritten += nWritten;
1263 if (nWritten == nToWrite)
1268 if (nWritten < 1 && totalWritten < 1) {
1269 yaffsfs_SetError(-ENOSPC);
1279 yaffsfs_PutHandle(handle);
1282 if (totalWritten > 0)
1283 fd->position = startPos + totalWritten;
1285 yaffsfs_SetError(-EINVAL);
1291 return (totalWritten >= 0) ? totalWritten : -1;
1294 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1296 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1299 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, loff_t offset)
1301 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1304 int yaffs_truncate(const YCHAR *path, loff_t new_size)
1306 struct yaffs_obj *obj = NULL;
1307 struct yaffs_obj *dir = NULL;
1308 int result = YAFFS_FAIL;
1313 yaffsfs_SetError(-EFAULT);
1317 if (yaffsfs_CheckPath(path) < 0) {
1318 yaffsfs_SetError(-ENAMETOOLONG);
1324 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1325 obj = yaffsfs_FollowLink(obj, 0, &loop);
1328 yaffsfs_SetError(-ENOTDIR);
1330 yaffsfs_SetError(-ELOOP);
1331 else if (!dir || !obj)
1332 yaffsfs_SetError(-ENOENT);
1333 else if (obj->my_dev->read_only)
1334 yaffsfs_SetError(-EROFS);
1335 else if (obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1336 yaffsfs_SetError(-EISDIR);
1337 else if (obj->my_dev->read_only)
1338 yaffsfs_SetError(-EROFS);
1339 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1340 yaffsfs_SetError(-EINVAL);
1342 result = yaffs_resize_file(obj, new_size);
1346 return (result) ? 0 : -1;
1349 int yaffs_ftruncate(int handle, loff_t new_size)
1351 struct yaffsfs_FileDes *fd = NULL;
1352 struct yaffs_obj *obj = NULL;
1356 fd = yaffsfs_HandleToFileDes(handle);
1357 obj = yaffsfs_HandleToObject(handle);
1361 yaffsfs_SetError(-EBADF);
1362 else if (!fd->writing)
1363 yaffsfs_SetError(-EINVAL);
1364 else if (obj->my_dev->read_only)
1365 yaffsfs_SetError(-EROFS);
1366 else if (new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1367 yaffsfs_SetError(-EINVAL);
1369 /* resize the file */
1370 result = yaffs_resize_file(obj, new_size);
1373 return (result) ? 0 : -1;
1377 loff_t yaffs_lseek(int handle, loff_t offset, int whence)
1379 struct yaffsfs_FileDes *fd = NULL;
1380 struct yaffs_obj *obj = NULL;
1385 fd = yaffsfs_HandleToFileDes(handle);
1386 obj = yaffsfs_HandleToObject(handle);
1389 yaffsfs_SetError(-EBADF);
1390 else if (offset > YAFFS_MAX_FILE_SIZE)
1391 yaffsfs_SetError(-EINVAL);
1393 if (whence == SEEK_SET) {
1396 } else if (whence == SEEK_CUR) {
1397 if ((fd->position + offset) >= 0)
1398 pos = (fd->position + offset);
1399 } else if (whence == SEEK_END) {
1400 fSize = yaffs_get_obj_length(obj);
1401 if (fSize >= 0 && (fSize + offset) >= 0)
1402 pos = fSize + offset;
1405 if (pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1408 yaffsfs_SetError(-EINVAL);
1418 int yaffsfs_DoUnlink(const YCHAR *path, int isDirectory)
1420 struct yaffs_obj *dir = NULL;
1421 struct yaffs_obj *obj = NULL;
1423 int result = YAFFS_FAIL;
1428 yaffsfs_SetError(-EFAULT);
1432 if (yaffsfs_CheckPath(path) < 0) {
1433 yaffsfs_SetError(-ENAMETOOLONG);
1439 obj = yaffsfs_FindObject(NULL, path, 0, 0, NULL, NULL, NULL);
1440 dir = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop);
1443 yaffsfs_SetError(-ENOTDIR);
1445 yaffsfs_SetError(-ELOOP);
1447 yaffsfs_SetError(-ENOENT);
1448 else if (yaffs_strncmp(name, _Y("."), 2) == 0)
1449 yaffsfs_SetError(-EINVAL);
1451 yaffsfs_SetError(-ENOENT);
1452 else if (obj->my_dev->read_only)
1453 yaffsfs_SetError(-EROFS);
1454 else if (!isDirectory &&
1455 obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1456 yaffsfs_SetError(-EISDIR);
1457 else if (isDirectory &&
1458 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1459 yaffsfs_SetError(-ENOTDIR);
1460 else if (isDirectory && obj == obj->my_dev->root_dir)
1461 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1463 result = yaffs_unlinker(dir, name);
1465 if (result == YAFFS_FAIL && isDirectory)
1466 yaffsfs_SetError(-ENOTEMPTY);
1471 return (result == YAFFS_FAIL) ? -1 : 0;
1474 int yaffs_unlink(const YCHAR *path)
1476 return yaffsfs_DoUnlink(path, 0);
1479 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1481 struct yaffs_obj *olddir = NULL;
1482 struct yaffs_obj *newdir = NULL;
1483 struct yaffs_obj *obj = NULL;
1484 struct yaffs_obj *newobj = NULL;
1487 int result = YAFFS_FAIL;
1488 int rename_allowed = 1;
1494 YCHAR *alt_newpath = NULL;
1496 if (!oldPath || !newPath) {
1497 yaffsfs_SetError(-EFAULT);
1501 if (yaffsfs_CheckPath(oldPath) < 0 || yaffsfs_CheckPath(newPath) < 0) {
1502 yaffsfs_SetError(-ENAMETOOLONG);
1506 if (yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0) {
1507 yaffsfs_SetError(-ENOMEM);
1511 newPath = alt_newpath;
1515 olddir = yaffsfs_FindDirectory(NULL, oldPath, &oldname, 0,
1516 ¬OldDir, &oldLoop);
1517 newdir = yaffsfs_FindDirectory(NULL, newPath, &newname, 0,
1518 ¬NewDir, &newLoop);
1519 obj = yaffsfs_FindObject(NULL, oldPath, 0, 0, NULL, NULL, NULL);
1520 newobj = yaffsfs_FindObject(NULL, newPath, 0, 0, NULL, NULL, NULL);
1522 /* If the object being renamed is a directory and the
1523 * path ended with a "/" then the olddir == obj.
1524 * We pass through NULL for the old name to tell the lower layers
1525 * to use olddir as the object.
1531 if ((!olddir && notOldDir) || (!newdir && notNewDir)) {
1532 yaffsfs_SetError(-ENOTDIR);
1534 } else if (oldLoop || newLoop) {
1535 yaffsfs_SetError(-ELOOP);
1537 } else if (olddir && oldname &&
1538 yaffs_strncmp(oldname, _Y("."), 2) == 0) {
1539 yaffsfs_SetError(-EINVAL);
1541 } else if (!olddir || !newdir || !obj) {
1542 yaffsfs_SetError(-ENOENT);
1544 } else if (obj->my_dev->read_only) {
1545 yaffsfs_SetError(-EROFS);
1547 } else if (yaffs_is_non_empty_dir(newobj)) {
1548 yaffsfs_SetError(-ENOTEMPTY);
1550 } else if (olddir->my_dev != newdir->my_dev) {
1551 /* Rename must be on same device */
1552 yaffsfs_SetError(-EXDEV);
1554 } else if (obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1556 * It is a directory, check that it is not being renamed to
1557 * being its own decendent.
1558 * Do this by tracing from the new directory back to the root,
1562 struct yaffs_obj *xx = newdir;
1564 while (rename_allowed && xx) {
1569 if (!rename_allowed)
1570 yaffsfs_SetError(-EINVAL);
1574 result = yaffs_rename_obj(olddir, oldname, newdir, newname);
1580 return (result == YAFFS_FAIL) ? -1 : 0;
1583 static int yaffsfs_DoStat(struct yaffs_obj *obj, struct yaffs_stat *buf)
1587 obj = yaffs_get_equivalent_obj(obj);
1590 buf->st_dev = (int)obj->my_dev->os_context;
1591 buf->st_ino = obj->obj_id;
1592 buf->st_mode = obj->yst_mode & ~S_IFMT;
1594 if (obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1595 buf->st_mode |= S_IFDIR;
1596 else if (obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1597 buf->st_mode |= S_IFLNK;
1598 else if (obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1599 buf->st_mode |= S_IFREG;
1601 buf->st_nlink = yaffs_get_obj_link_count(obj);
1604 buf->st_rdev = obj->yst_rdev;
1605 buf->st_size = yaffs_get_obj_length(obj);
1606 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1607 buf->st_blocks = lldiv(buf->st_size + buf->st_blksize - 1,
1609 #if CONFIG_YAFFS_WINCE
1610 buf->yst_wince_atime[0] = obj->win_atime[0];
1611 buf->yst_wince_atime[1] = obj->win_atime[1];
1612 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1613 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1614 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1615 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1617 buf->yst_atime = obj->yst_atime;
1618 buf->yst_ctime = obj->yst_ctime;
1619 buf->yst_mtime = obj->yst_mtime;
1626 static int yaffsfs_DoStatOrLStat(const YCHAR *path,
1627 struct yaffs_stat *buf, int doLStat)
1629 struct yaffs_obj *obj = NULL;
1630 struct yaffs_obj *dir = NULL;
1635 if (!path || !buf) {
1636 yaffsfs_SetError(-EFAULT);
1640 if (yaffsfs_CheckPath(path) < 0) {
1641 yaffsfs_SetError(-ENAMETOOLONG);
1647 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1649 if (!doLStat && obj)
1650 obj = yaffsfs_FollowLink(obj, 0, &loop);
1653 yaffsfs_SetError(-ENOTDIR);
1655 yaffsfs_SetError(-ELOOP);
1656 else if (!dir || !obj)
1657 yaffsfs_SetError(-ENOENT);
1659 retVal = yaffsfs_DoStat(obj, buf);
1667 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1669 return yaffsfs_DoStatOrLStat(path, buf, 0);
1672 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1674 return yaffsfs_DoStatOrLStat(path, buf, 1);
1677 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1679 struct yaffs_obj *obj;
1684 yaffsfs_SetError(-EFAULT);
1689 obj = yaffsfs_HandleToObject(fd);
1692 retVal = yaffsfs_DoStat(obj, buf);
1695 yaffsfs_SetError(-EBADF);
1702 static int yaffsfs_DoUtime(struct yaffs_obj *obj,
1703 const struct yaffs_utimbuf *buf)
1708 struct yaffs_utimbuf local;
1710 obj = yaffs_get_equivalent_obj(obj);
1712 if (obj && obj->my_dev->read_only) {
1713 yaffsfs_SetError(-EROFS);
1718 local.actime = Y_CURRENT_TIME;
1719 local.modtime = local.actime;
1724 obj->yst_atime = buf->actime;
1725 obj->yst_mtime = buf->modtime;
1727 result = yaffs_flush_file(obj, 0, 0);
1728 retVal = result == YAFFS_OK ? 0 : -1;
1734 int yaffs_utime(const YCHAR *path, const struct yaffs_utimbuf *buf)
1736 struct yaffs_obj *obj = NULL;
1737 struct yaffs_obj *dir = NULL;
1743 yaffsfs_SetError(-EFAULT);
1747 if (yaffsfs_CheckPath(path) < 0) {
1748 yaffsfs_SetError(-ENAMETOOLONG);
1754 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1757 yaffsfs_SetError(-ENOTDIR);
1759 yaffsfs_SetError(-ELOOP);
1760 else if (!dir || !obj)
1761 yaffsfs_SetError(-ENOENT);
1763 retVal = yaffsfs_DoUtime(obj, buf);
1771 int yaffs_futime(int fd, const struct yaffs_utimbuf *buf)
1773 struct yaffs_obj *obj;
1778 obj = yaffsfs_HandleToObject(fd);
1781 retVal = yaffsfs_DoUtime(obj, buf);
1784 yaffsfs_SetError(-EBADF);
1791 #ifndef CONFIG_YAFFS_WINCE
1792 /* xattrib functions */
1794 static int yaffs_do_setxattr(const YCHAR *path, const char *name,
1795 const void *data, int size, int flags, int follow)
1797 struct yaffs_obj *obj;
1798 struct yaffs_obj *dir;
1804 if (!path || !name || !data) {
1805 yaffsfs_SetError(-EFAULT);
1809 if (yaffsfs_CheckPath(path) < 0) {
1810 yaffsfs_SetError(-ENAMETOOLONG);
1816 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1819 obj = yaffsfs_FollowLink(obj, 0, &loop);
1822 yaffsfs_SetError(-ENOTDIR);
1824 yaffsfs_SetError(-ELOOP);
1825 else if (!dir || !obj)
1826 yaffsfs_SetError(-ENOENT);
1828 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
1830 yaffsfs_SetError(retVal);
1841 int yaffs_setxattr(const YCHAR *path, const char *name,
1842 const void *data, int size, int flags)
1844 return yaffs_do_setxattr(path, name, data, size, flags, 1);
1847 int yaffs_lsetxattr(const YCHAR *path, const char *name,
1848 const void *data, int size, int flags)
1850 return yaffs_do_setxattr(path, name, data, size, flags, 0);
1853 int yaffs_fsetxattr(int fd, const char *name,
1854 const void *data, int size, int flags)
1856 struct yaffs_obj *obj;
1860 if (!name || !data) {
1861 yaffsfs_SetError(-EFAULT);
1866 obj = yaffsfs_HandleToObject(fd);
1869 yaffsfs_SetError(-EBADF);
1871 retVal = yaffs_set_xattrib(obj, name, data, size, flags);
1873 yaffsfs_SetError(retVal);
1883 static int yaffs_do_getxattr(const YCHAR *path, const char *name,
1884 void *data, int size, int follow)
1886 struct yaffs_obj *obj;
1887 struct yaffs_obj *dir;
1892 if (!path || !name || !data) {
1893 yaffsfs_SetError(-EFAULT);
1897 if (yaffsfs_CheckPath(path) < 0) {
1898 yaffsfs_SetError(-ENAMETOOLONG);
1904 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
1907 obj = yaffsfs_FollowLink(obj, 0, &loop);
1910 yaffsfs_SetError(-ENOTDIR);
1912 yaffsfs_SetError(-ELOOP);
1913 else if (!dir || !obj)
1914 yaffsfs_SetError(-ENOENT);
1916 retVal = yaffs_get_xattrib(obj, name, data, size);
1918 yaffsfs_SetError(retVal);
1928 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
1930 return yaffs_do_getxattr(path, name, data, size, 1);
1933 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
1935 return yaffs_do_getxattr(path, name, data, size, 0);
1938 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
1940 struct yaffs_obj *obj;
1944 if (!name || !data) {
1945 yaffsfs_SetError(-EFAULT);
1950 obj = yaffsfs_HandleToObject(fd);
1953 retVal = yaffs_get_xattrib(obj, name, data, size);
1955 yaffsfs_SetError(retVal);
1960 yaffsfs_SetError(-EBADF);
1967 static int yaffs_do_listxattr(const YCHAR *path, char *data,
1968 int size, int follow)
1970 struct yaffs_obj *obj = NULL;
1971 struct yaffs_obj *dir = NULL;
1976 if (!path || !data) {
1977 yaffsfs_SetError(-EFAULT);
1981 if (yaffsfs_CheckPath(path) < 0) {
1982 yaffsfs_SetError(-ENAMETOOLONG);
1988 obj = yaffsfs_FindObject(NULL, 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_list_xattrib(obj, data, size);
2002 yaffsfs_SetError(retVal);
2013 int yaffs_listxattr(const YCHAR *path, char *data, int size)
2015 return yaffs_do_listxattr(path, data, size, 1);
2018 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
2020 return yaffs_do_listxattr(path, data, size, 0);
2023 int yaffs_flistxattr(int fd, char *data, int size)
2025 struct yaffs_obj *obj;
2030 yaffsfs_SetError(-EFAULT);
2035 obj = yaffsfs_HandleToObject(fd);
2038 retVal = yaffs_list_xattrib(obj, data, size);
2040 yaffsfs_SetError(retVal);
2045 yaffsfs_SetError(-EBADF);
2052 static int yaffs_do_removexattr(const YCHAR *path, const char *name,
2055 struct yaffs_obj *obj = NULL;
2056 struct yaffs_obj *dir = NULL;
2061 if (!path || !name) {
2062 yaffsfs_SetError(-EFAULT);
2066 if (yaffsfs_CheckPath(path) < 0) {
2067 yaffsfs_SetError(-ENAMETOOLONG);
2073 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2076 obj = yaffsfs_FollowLink(obj, 0, &loop);
2079 yaffsfs_SetError(-ENOTDIR);
2081 yaffsfs_SetError(-ELOOP);
2082 else if (!dir || !obj)
2083 yaffsfs_SetError(-ENOENT);
2085 retVal = yaffs_remove_xattrib(obj, name);
2087 yaffsfs_SetError(retVal);
2098 int yaffs_removexattr(const YCHAR *path, const char *name)
2100 return yaffs_do_removexattr(path, name, 1);
2103 int yaffs_lremovexattr(const YCHAR *path, const char *name)
2105 return yaffs_do_removexattr(path, name, 0);
2108 int yaffs_fremovexattr(int fd, const char *name)
2110 struct yaffs_obj *obj;
2115 yaffsfs_SetError(-EFAULT);
2120 obj = yaffsfs_HandleToObject(fd);
2123 retVal = yaffs_remove_xattrib(obj, name);
2125 yaffsfs_SetError(retVal);
2130 yaffsfs_SetError(-EBADF);
2138 #ifdef CONFIG_YAFFS_WINCE
2139 int yaffs_get_wince_times(int fd, unsigned *wctime,
2140 unsigned *watime, unsigned *wmtime)
2142 struct yaffs_obj *obj;
2147 obj = yaffsfs_HandleToObject(fd);
2152 wctime[0] = obj->win_ctime[0];
2153 wctime[1] = obj->win_ctime[1];
2156 watime[0] = obj->win_atime[0];
2157 watime[1] = obj->win_atime[1];
2160 wmtime[0] = obj->win_mtime[0];
2161 wmtime[1] = obj->win_mtime[1];
2167 yaffsfs_SetError(-EBADF);
2174 int yaffs_set_wince_times(int fd,
2175 const unsigned *wctime,
2176 const unsigned *watime, const unsigned *wmtime)
2178 struct yaffs_obj *obj;
2183 obj = yaffsfs_HandleToObject(fd);
2188 obj->win_ctime[0] = wctime[0];
2189 obj->win_ctime[1] = wctime[1];
2192 obj->win_atime[0] = watime[0];
2193 obj->win_atime[1] = watime[1];
2196 obj->win_mtime[0] = wmtime[0];
2197 obj->win_mtime[1] = wmtime[1];
2201 result = yaffs_flush_file(obj, 0, 0);
2205 yaffsfs_SetError(-EBADF);
2214 static int yaffsfs_DoChMod(struct yaffs_obj *obj, mode_t mode)
2219 obj = yaffs_get_equivalent_obj(obj);
2222 obj->yst_mode = mode;
2224 result = yaffs_flush_file(obj, 0, 0);
2227 return result == YAFFS_OK ? 0 : -1;
2230 int yaffs_access(const YCHAR *path, int amode)
2232 struct yaffs_obj *obj = NULL;
2233 struct yaffs_obj *dir = NULL;
2239 yaffsfs_SetError(-EFAULT);
2243 if (yaffsfs_CheckPath(path) < 0) {
2244 yaffsfs_SetError(-ENAMETOOLONG);
2248 if (amode & ~(R_OK | W_OK | X_OK)) {
2249 yaffsfs_SetError(-EINVAL);
2255 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2256 obj = yaffsfs_FollowLink(obj, 0, &loop);
2259 yaffsfs_SetError(-ENOTDIR);
2261 yaffsfs_SetError(-ELOOP);
2262 else if (!dir || !obj)
2263 yaffsfs_SetError(-ENOENT);
2264 else if ((amode & W_OK) && obj->my_dev->read_only)
2265 yaffsfs_SetError(-EROFS);
2269 if ((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2271 if ((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2273 if ((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2277 yaffsfs_SetError(-EACCES);
2288 int yaffs_chmod(const YCHAR *path, mode_t mode)
2290 struct yaffs_obj *obj = NULL;
2291 struct yaffs_obj *dir = NULL;
2297 yaffsfs_SetError(-EFAULT);
2301 if (yaffsfs_CheckPath(path) < 0) {
2302 yaffsfs_SetError(-ENAMETOOLONG);
2306 if (mode & ~(0777)) {
2307 yaffsfs_SetError(-EINVAL);
2313 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
2314 obj = yaffsfs_FollowLink(obj, 0, &loop);
2317 yaffsfs_SetError(-ENOTDIR);
2319 yaffsfs_SetError(-ELOOP);
2320 else if (!dir || !obj)
2321 yaffsfs_SetError(-ENOENT);
2322 else if (obj->my_dev->read_only)
2323 yaffsfs_SetError(-EROFS);
2325 retVal = yaffsfs_DoChMod(obj, mode);
2333 int yaffs_fchmod(int fd, mode_t mode)
2335 struct yaffs_obj *obj;
2338 if (mode & ~(0777)) {
2339 yaffsfs_SetError(-EINVAL);
2344 obj = yaffsfs_HandleToObject(fd);
2347 yaffsfs_SetError(-EBADF);
2348 else if (obj->my_dev->read_only)
2349 yaffsfs_SetError(-EROFS);
2351 retVal = yaffsfs_DoChMod(obj, mode);
2358 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2360 struct yaffs_obj *parent = NULL;
2361 struct yaffs_obj *dir = NULL;
2363 YCHAR *alt_path = NULL;
2369 yaffsfs_SetError(-EFAULT);
2373 if (yaffsfs_CheckPath(path) < 0) {
2374 yaffsfs_SetError(-ENAMETOOLONG);
2378 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2379 yaffsfs_SetError(-ENOMEM);
2386 parent = yaffsfs_FindDirectory(NULL, path, &name, 0, ¬Dir, &loop);
2387 if (!parent && notDir)
2388 yaffsfs_SetError(-ENOTDIR);
2390 yaffsfs_SetError(-ELOOP);
2392 yaffsfs_SetError(-ENOENT);
2393 else if (yaffsfs_TooManyObjects(parent->my_dev))
2394 yaffsfs_SetError(-ENFILE);
2395 else if (yaffs_strnlen(name, 5) == 0) {
2396 /* Trying to make the root itself */
2397 yaffsfs_SetError(-EEXIST);
2398 } else if (parent->my_dev->read_only)
2399 yaffsfs_SetError(-EROFS);
2401 dir = yaffs_create_dir(parent, name, mode, 0, 0);
2404 else if (yaffs_find_by_name(parent, name))
2405 yaffsfs_SetError(-EEXIST); /* name exists */
2407 yaffsfs_SetError(-ENOSPC); /* assume no space */
2417 int yaffs_rmdir(const YCHAR *path)
2423 yaffsfs_SetError(-EFAULT);
2427 if (yaffsfs_CheckPath(path) < 0) {
2428 yaffsfs_SetError(-ENAMETOOLONG);
2432 if (yaffsfs_alt_dir_path(path, &alt_path) < 0) {
2433 yaffsfs_SetError(-ENOMEM);
2438 result = yaffsfs_DoUnlink(path, 1);
2445 void *yaffs_getdev(const YCHAR *path)
2447 struct yaffs_dev *dev = NULL;
2449 dev = yaffsfs_FindDevice(path, &dummy);
2453 int yaffs_mount_common(const YCHAR *path, int read_only, int skip_checkpt)
2456 int result = YAFFS_FAIL;
2457 struct yaffs_dev *dev = NULL;
2460 yaffsfs_SetError(-EFAULT);
2464 yaffs_trace(YAFFS_TRACE_MOUNT, "yaffs: Mounting %s", path);
2466 if (yaffsfs_CheckPath(path) < 0) {
2467 yaffsfs_SetError(-ENAMETOOLONG);
2473 yaffsfs_InitHandles();
2475 dev = yaffsfs_FindMountPoint(path);
2477 if (!dev->is_mounted) {
2478 dev->read_only = read_only ? 1 : 0;
2480 u8 skip = dev->param.skip_checkpt_rd;
2481 dev->param.skip_checkpt_rd = 1;
2482 result = yaffs_guts_initialise(dev);
2483 dev->param.skip_checkpt_rd = skip;
2485 result = yaffs_guts_initialise(dev);
2488 if (result == YAFFS_FAIL)
2489 yaffsfs_SetError(-ENOMEM);
2490 retVal = result ? 0 : -1;
2493 yaffsfs_SetError(-EBUSY);
2495 yaffsfs_SetError(-ENODEV);
2502 int yaffs_mount2(const YCHAR *path, int readonly)
2504 return yaffs_mount_common(path, readonly, 0);
2507 int yaffs_mount(const YCHAR *path)
2509 return yaffs_mount_common(path, 0, 0);
2512 int yaffs_sync(const YCHAR *path)
2515 struct yaffs_dev *dev = NULL;
2519 yaffsfs_SetError(-EFAULT);
2523 if (yaffsfs_CheckPath(path) < 0) {
2524 yaffsfs_SetError(-ENAMETOOLONG);
2529 dev = yaffsfs_FindDevice(path, &dummy);
2531 if (!dev->is_mounted)
2532 yaffsfs_SetError(-EINVAL);
2533 else if (dev->read_only)
2534 yaffsfs_SetError(-EROFS);
2537 yaffs_flush_whole_cache(dev);
2538 yaffs_checkpoint_save(dev);
2543 yaffsfs_SetError(-ENODEV);
2549 static int yaffsfs_IsDevBusy(struct yaffs_dev *dev)
2552 struct yaffs_obj *obj;
2554 for (i = 0; i < YAFFSFS_N_HANDLES; i++) {
2555 obj = yaffsfs_HandleToObject(i);
2556 if (obj && obj->my_dev == dev)
2562 int yaffs_remount(const YCHAR *path, int force, int read_only)
2565 struct yaffs_dev *dev = NULL;
2568 yaffsfs_SetError(-EFAULT);
2572 if (yaffsfs_CheckPath(path) < 0) {
2573 yaffsfs_SetError(-ENAMETOOLONG);
2578 dev = yaffsfs_FindMountPoint(path);
2580 if (dev->is_mounted) {
2581 yaffs_flush_whole_cache(dev);
2583 if (force || !yaffsfs_IsDevBusy(dev)) {
2585 yaffs_checkpoint_save(dev);
2586 dev->read_only = read_only ? 1 : 0;
2589 yaffsfs_SetError(-EBUSY);
2592 yaffsfs_SetError(-EINVAL);
2595 yaffsfs_SetError(-ENODEV);
2602 int yaffs_unmount2(const YCHAR *path, int force)
2605 struct yaffs_dev *dev = NULL;
2608 yaffsfs_SetError(-EFAULT);
2612 if (yaffsfs_CheckPath(path) < 0) {
2613 yaffsfs_SetError(-ENAMETOOLONG);
2618 dev = yaffsfs_FindMountPoint(path);
2620 if (dev->is_mounted) {
2622 yaffs_flush_whole_cache(dev);
2623 yaffs_checkpoint_save(dev);
2624 inUse = yaffsfs_IsDevBusy(dev);
2625 if (!inUse || force) {
2627 yaffsfs_BreakDeviceHandles(dev);
2628 yaffs_deinitialise(dev);
2632 yaffsfs_SetError(-EBUSY);
2635 yaffsfs_SetError(-EINVAL);
2638 yaffsfs_SetError(-ENODEV);
2645 int yaffs_unmount(const YCHAR *path)
2647 return yaffs_unmount2(path, 0);
2650 loff_t yaffs_freespace(const YCHAR *path)
2653 struct yaffs_dev *dev = NULL;
2657 yaffsfs_SetError(-EFAULT);
2661 if (yaffsfs_CheckPath(path) < 0) {
2662 yaffsfs_SetError(-ENAMETOOLONG);
2667 dev = yaffsfs_FindDevice(path, &dummy);
2668 if (dev && dev->is_mounted) {
2669 retVal = yaffs_get_n_free_chunks(dev);
2670 retVal *= dev->data_bytes_per_chunk;
2673 yaffsfs_SetError(-EINVAL);
2679 loff_t yaffs_totalspace(const YCHAR *path)
2682 struct yaffs_dev *dev = NULL;
2686 yaffsfs_SetError(-EFAULT);
2690 if (yaffsfs_CheckPath(path) < 0) {
2691 yaffsfs_SetError(-ENAMETOOLONG);
2696 dev = yaffsfs_FindDevice(path, &dummy);
2697 if (dev && dev->is_mounted) {
2698 retVal = (dev->param.end_block - dev->param.start_block + 1) -
2699 dev->param.n_reserved_blocks;
2700 retVal *= dev->param.chunks_per_block;
2701 retVal *= dev->data_bytes_per_chunk;
2704 yaffsfs_SetError(-EINVAL);
2710 int yaffs_inodecount(const YCHAR *path)
2713 struct yaffs_dev *dev = NULL;
2717 yaffsfs_SetError(-EFAULT);
2721 if (yaffsfs_CheckPath(path) < 0) {
2722 yaffsfs_SetError(-ENAMETOOLONG);
2727 dev = yaffsfs_FindDevice(path, &dummy);
2728 if (dev && dev->is_mounted) {
2729 int n_obj = dev->n_obj;
2730 if (n_obj > dev->n_hardlinks)
2731 retVal = n_obj - dev->n_hardlinks;
2735 yaffsfs_SetError(-EINVAL);
2741 void yaffs_add_device(struct yaffs_dev *dev)
2743 struct list_head *cfg;
2744 /* First check that the device is not in the list. */
2746 list_for_each(cfg, &yaffsfs_deviceList) {
2747 if (dev == list_entry(cfg, struct yaffs_dev, dev_list))
2751 dev->is_mounted = 0;
2752 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
2754 if (!dev->dev_list.next)
2755 INIT_LIST_HEAD(&dev->dev_list);
2757 list_add(&dev->dev_list, &yaffsfs_deviceList);
2760 void yaffs_remove_device(struct yaffs_dev *dev)
2762 list_del_init(&dev->dev_list);
2765 /* Functions to iterate through devices. NB Use with extreme care! */
2767 static struct list_head *dev_iterator;
2768 void yaffs_dev_rewind(void)
2770 dev_iterator = yaffsfs_deviceList.next;
2773 struct yaffs_dev *yaffs_next_dev(void)
2775 struct yaffs_dev *retval;
2779 if (dev_iterator == &yaffsfs_deviceList)
2782 retval = list_entry(dev_iterator, struct yaffs_dev, dev_list);
2783 dev_iterator = dev_iterator->next;
2787 /* Directory search stuff. */
2789 static struct list_head search_contexts;
2791 static void yaffsfs_SetDirRewound(struct yaffsfs_DirSearchContxt *dsc)
2795 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
2799 if (list_empty(&dsc->dirObj->variant.dir_variant.children))
2800 dsc->nextReturn = NULL;
2803 list_entry(dsc->dirObj->variant.dir_variant.
2804 children.next, struct yaffs_obj,
2807 /* Hey someone isn't playing nice! */
2811 static void yaffsfs_DirAdvance(struct yaffsfs_DirSearchContxt *dsc)
2815 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
2817 if (dsc->nextReturn == NULL ||
2818 list_empty(&dsc->dirObj->variant.dir_variant.children))
2819 dsc->nextReturn = NULL;
2821 struct list_head *next = dsc->nextReturn->siblings.next;
2823 if (next == &dsc->dirObj->variant.dir_variant.children)
2824 dsc->nextReturn = NULL; /* end of list */
2826 dsc->nextReturn = list_entry(next,
2831 /* Hey someone isn't playing nice! */
2835 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
2838 struct list_head *i;
2839 struct yaffsfs_DirSearchContxt *dsc;
2841 /* if search contexts not initilised then skip */
2842 if (!search_contexts.next)
2845 /* Iterate through the directory search contexts.
2846 * If any are the one being removed, then advance the dsc to
2847 * the next one to prevent a hanging ptr.
2849 list_for_each(i, &search_contexts) {
2850 dsc = list_entry(i, struct yaffsfs_DirSearchContxt, others);
2851 if (dsc->nextReturn == obj)
2852 yaffsfs_DirAdvance(dsc);
2857 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
2859 yaffs_DIR *dir = NULL;
2860 struct yaffs_obj *obj = NULL;
2861 struct yaffsfs_DirSearchContxt *dsc = NULL;
2866 yaffsfs_SetError(-EFAULT);
2870 if (yaffsfs_CheckPath(dirname) < 0) {
2871 yaffsfs_SetError(-ENAMETOOLONG);
2877 obj = yaffsfs_FindObject(NULL, dirname, 0, 1, NULL, ¬Dir, &loop);
2880 yaffsfs_SetError(-ENOTDIR);
2882 yaffsfs_SetError(-ELOOP);
2884 yaffsfs_SetError(-ENOENT);
2885 else if (obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
2886 yaffsfs_SetError(-ENOTDIR);
2890 for (i = 0, dsc = NULL; i < YAFFSFS_N_DSC && !dsc; i++) {
2891 if (!yaffsfs_dsc[i].inUse)
2892 dsc = &yaffsfs_dsc[i];
2895 dir = (yaffs_DIR *) dsc;
2898 memset(dsc, 0, sizeof(struct yaffsfs_DirSearchContxt));
2901 yaffs_strncpy(dsc->name, dirname, NAME_MAX);
2902 INIT_LIST_HEAD(&dsc->others);
2904 if (!search_contexts.next)
2905 INIT_LIST_HEAD(&search_contexts);
2907 list_add(&dsc->others, &search_contexts);
2908 yaffsfs_SetDirRewound(dsc);
2918 struct yaffs_dirent *yaffs_readdir(yaffs_DIR * dirp)
2920 struct yaffsfs_DirSearchContxt *dsc;
2921 struct yaffs_dirent *retVal = NULL;
2923 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2926 if (dsc && dsc->inUse) {
2927 yaffsfs_SetError(0);
2928 if (dsc->nextReturn) {
2930 yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
2931 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
2932 dsc->de.d_off = dsc->offset++;
2933 yaffs_get_obj_name(dsc->nextReturn,
2934 dsc->de.d_name, NAME_MAX);
2935 if (yaffs_strnlen(dsc->de.d_name, NAME_MAX + 1) == 0) {
2936 /* this should not happen! */
2937 yaffs_strcpy(dsc->de.d_name, _Y("zz"));
2939 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
2941 yaffsfs_DirAdvance(dsc);
2945 yaffsfs_SetError(-EBADF);
2953 void yaffs_rewinddir(yaffs_DIR *dirp)
2955 struct yaffsfs_DirSearchContxt *dsc;
2957 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2961 yaffsfs_SetDirRewound(dsc);
2966 int yaffs_closedir(yaffs_DIR *dirp)
2968 struct yaffsfs_DirSearchContxt *dsc;
2970 dsc = (struct yaffsfs_DirSearchContxt *) dirp;
2973 yaffsfs_SetError(-EFAULT);
2979 list_del(&dsc->others); /* unhook from list */
2984 /* End of directory stuff */
2986 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
2988 struct yaffs_obj *parent = NULL;
2989 struct yaffs_obj *obj;
2992 int mode = 0; /* ignore for now */
2996 if (!oldpath || !newpath) {
2997 yaffsfs_SetError(-EFAULT);
3001 if (yaffsfs_CheckPath(newpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3002 yaffsfs_SetError(-ENAMETOOLONG);
3007 parent = yaffsfs_FindDirectory(NULL, newpath, &name, 0, ¬Dir, &loop);
3008 if (!parent && notDir)
3009 yaffsfs_SetError(-ENOTDIR);
3011 yaffsfs_SetError(-ELOOP);
3012 else if (!parent || yaffs_strnlen(name, 5) < 1)
3013 yaffsfs_SetError(-ENOENT);
3014 else if (yaffsfs_TooManyObjects(parent->my_dev))
3015 yaffsfs_SetError(-ENFILE);
3016 else if (parent->my_dev->read_only)
3017 yaffsfs_SetError(-EROFS);
3019 obj = yaffs_create_symlink(parent, name, mode, 0, 0, oldpath);
3022 else if (yaffsfs_FindObject
3023 (NULL, newpath, 0, 0, NULL, NULL, NULL))
3024 yaffsfs_SetError(-EEXIST);
3026 yaffsfs_SetError(-ENOSPC);
3035 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
3037 struct yaffs_obj *obj = NULL;
3038 struct yaffs_obj *dir = NULL;
3043 if (!path || !buf) {
3044 yaffsfs_SetError(-EFAULT);
3050 obj = yaffsfs_FindObject(NULL, path, 0, 1, &dir, ¬Dir, &loop);
3053 yaffsfs_SetError(-ENOTDIR);
3055 yaffsfs_SetError(-ELOOP);
3056 else if (!dir || !obj)
3057 yaffsfs_SetError(-ENOENT);
3058 else if (obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
3059 yaffsfs_SetError(-EINVAL);
3061 YCHAR *alias = obj->variant.symlink_variant.alias;
3062 memset(buf, 0, bufsiz);
3063 yaffs_strncpy(buf, alias, bufsiz - 1);
3070 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
3072 /* Creates a link called newpath to existing oldpath */
3073 struct yaffs_obj *obj = NULL;
3074 struct yaffs_obj *lnk = NULL;
3075 struct yaffs_obj *obj_dir = NULL;
3076 struct yaffs_obj *lnk_dir = NULL;
3084 if (!oldpath || !linkpath) {
3085 yaffsfs_SetError(-EFAULT);
3089 if (yaffsfs_CheckPath(linkpath) < 0 || yaffsfs_CheckPath(oldpath) < 0) {
3090 yaffsfs_SetError(-ENAMETOOLONG);
3096 obj = yaffsfs_FindObject(NULL, oldpath, 0, 1,
3097 &obj_dir, ¬DirObj, &objLoop);
3098 lnk = yaffsfs_FindObject(NULL, linkpath, 0, 0, NULL, NULL, NULL);
3099 lnk_dir = yaffsfs_FindDirectory(NULL, linkpath, &newname,
3100 0, ¬DirLnk, &lnkLoop);
3102 if ((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
3103 yaffsfs_SetError(-ENOTDIR);
3104 else if (objLoop || lnkLoop)
3105 yaffsfs_SetError(-ELOOP);
3106 else if (!obj_dir || !lnk_dir || !obj)
3107 yaffsfs_SetError(-ENOENT);
3108 else if (obj->my_dev->read_only)
3109 yaffsfs_SetError(-EROFS);
3110 else if (yaffsfs_TooManyObjects(obj->my_dev))
3111 yaffsfs_SetError(-ENFILE);
3113 yaffsfs_SetError(-EEXIST);
3114 else if (lnk_dir->my_dev != obj->my_dev)
3115 yaffsfs_SetError(-EXDEV);
3117 retVal = yaffsfs_CheckNameLength(newname);
3120 lnk = yaffs_link_obj(lnk_dir, newname, obj);
3124 yaffsfs_SetError(-ENOSPC);
3134 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
3136 yaffsfs_SetError(-EINVAL);
3141 * D E B U G F U N C T I O N S
3146 * Returns number of handles attached to the object
3148 int yaffs_n_handles(const YCHAR *path)
3150 struct yaffs_obj *obj;
3153 yaffsfs_SetError(-EFAULT);
3157 if (yaffsfs_CheckPath(path) < 0) {
3158 yaffsfs_SetError(-ENAMETOOLONG);
3162 obj = yaffsfs_FindObject(NULL, path, 0, 1, NULL, NULL, NULL);
3165 return yaffsfs_CountHandles(obj);
3170 int yaffs_get_error(void)
3172 return yaffsfs_GetLastError();
3175 int yaffs_set_error(int error)
3177 yaffsfs_SetError(error);
3181 int yaffs_dump_dev(const YCHAR *path)
3186 struct yaffs_obj *obj = yaffsfs_FindRoot(path, &rest);
3189 struct yaffs_dev *dev = obj->my_dev;
3192 "n_page_writes.......... %d\n"
3193 "n_page_reads........... %d\n"
3194 "n_erasures....... %d\n"
3195 "n_gc_copies............ %d\n"
3196 "garbageCollections... %d\n"
3197 "passiveGarbageColl'ns %d\n"
3203 dev->garbageCollections, dev->passiveGarbageCollections);