2 * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
4 * Copyright (C) 2002-2010 Aleph One Ltd.
5 * for Toby Churchill Ltd and Brightstar Engineering
7 * Created by Charles Manning <charles@aleph1.co.uk>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
15 #include "yaffs_guts.h"
18 #include "yaffs_trace.h"
20 #include <string.h> /* for memset */
22 #define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
25 #define NULL ((void *)0)
29 /* YAFFSFS_RW_SIZE must be a power of 2 */
30 #define YAFFSFS_RW_SHIFT (13)
31 #define YAFFSFS_RW_SIZE (1<<YAFFSFS_RW_SHIFT)
33 /* Some forward references */
34 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
36 int symDepth, int getEquiv,
37 struct yaffs_obj **dirOut,
38 int *notDir, int *loop);
40 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
42 unsigned int yaffs_wr_attempts;
46 * There are open inodes in yaffsfs_Inode.
47 * There are open file descriptors in yaffsfs_FileDes.
48 * There are open handles in yaffsfs_FileDes.
50 * Things are structured this way to be like the Linux VFS model
51 * so that interactions with the yaffs guts calls are similar.
52 * That means more common code paths and less special code.
53 * That means better testing etc.
55 * We have 3 layers because:
56 * A handle is different than an fd because you can use dup()
57 * to create a new handle that accesses the *same* fd. The two
58 * handles will use the same offset (part of the fd). We only close
59 * down the fd when there are no more handles accessing it.
61 * More than one fd can currently access one file, but each fd
62 * has its own permsiions and offset.
66 int count; /* Number of handles accessing this inode */
67 struct yaffs_obj *iObj;
76 int inodeId:12; /* Index to corresponding yaffsfs_Inode */
77 int handleCount:10; /* Number of handles for this fd */
78 u32 position; /* current position in file */
86 static yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
87 static yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
88 static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
90 static int yaffsfs_handlesInitialised;
93 unsigned yaffs_set_trace(unsigned tm)
95 yaffs_trace_mask = tm;
96 return yaffs_trace_mask;
99 unsigned yaffs_get_trace(void)
101 return yaffs_trace_mask;
106 * Inilitalise handle management on start-up.
109 static void yaffsfs_InitHandles(void)
112 if(yaffsfs_handlesInitialised)
115 memset(yaffsfs_inode,0,sizeof(yaffsfs_inode));
116 memset(yaffsfs_fd,0,sizeof(yaffsfs_fd));
117 memset(yaffsfs_handle,0,sizeof(yaffsfs_handle));
119 for(i = 0; i < YAFFSFS_N_HANDLES; i++)
120 yaffsfs_fd[i].inodeId = -1;
121 for(i = 0; i < YAFFSFS_N_HANDLES; i++)
122 yaffsfs_handle[i].fdId = -1;
125 static yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
127 if(h >= 0 && h <= YAFFSFS_N_HANDLES)
128 return &yaffsfs_handle[h];
132 static yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
134 yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
136 if(h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
137 return &yaffsfs_fd[h->fdId];
142 static yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
144 yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
146 if(fd && fd->handleCount > 0 &&
147 fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
148 return &yaffsfs_inode[fd->inodeId];
153 static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
155 yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
164 * yaffsfs_FindInodeIdForObject
165 * Find the inode entry for an object, if it exists.
168 static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
174 obj = yaffs_get_equivalent_obj(obj);
176 /* Look for it in open inode table*/
177 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
178 if(yaffsfs_inode[i].iObj == obj)
185 * yaffsfs_GetInodeIdForObject
186 * Grab an inode entry when opening a new inode.
188 static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
192 yaffsfs_Inode *in = NULL;
195 obj = yaffs_get_equivalent_obj(obj);
197 ret = yaffsfs_FindInodeIdForObject(obj);
199 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
200 if(!yaffsfs_inode[i].iObj)
205 in = &yaffsfs_inode[ret];
217 static int yaffsfs_CountHandles(struct yaffs_obj *obj)
219 int i = yaffsfs_FindInodeIdForObject(obj);
222 return yaffsfs_inode[i].count;
227 static void yaffsfs_ReleaseInode(yaffsfs_Inode *in)
229 struct yaffs_obj *obj;
236 obj->my_inode = NULL;
241 static void yaffsfs_PutInode(int inodeId)
243 if(inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES){
244 yaffsfs_Inode *in = & yaffsfs_inode[inodeId];
247 yaffsfs_ReleaseInode(in);
255 static int yaffsfs_NewHandle(yaffsfs_Handle **hptr)
260 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
261 h = &yaffsfs_handle[i];
263 memset(h,0,sizeof(yaffsfs_Handle));
274 static int yaffsfs_NewHandleAndFileDes(void)
278 yaffsfs_Handle *h = NULL;
279 int handle = yaffsfs_NewHandle(&h);
284 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
286 if(fd->handleCount < 1){
287 memset(fd,0,sizeof(yaffsfs_FileDes));
295 /* Dump the handle because we could not get a fd */
302 * Increase use of handle when reading/writing a file
303 * Also gets the file descriptor.
306 static int yaffsfs_GetHandle(int handle)
308 yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
310 if(h && h->useCount > 0){
319 * Let go of a handle when closing a file or aborting an open or
320 * ending a read or write.
323 static int yaffsfs_PutFileDes(int fdId)
327 if(fdId >= 0 && fdId < YAFFSFS_N_HANDLES){
328 fd = &yaffsfs_fd[fdId];
330 if(fd->handleCount < 1){
331 if(fd->inodeId >= 0){
332 yaffsfs_PutInode(fd->inodeId);
339 static int yaffsfs_PutHandle(int handle)
341 yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
343 if(h && h->useCount > 0){
346 yaffsfs_PutFileDes(h->fdId);
354 static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
358 struct yaffs_obj *obj;
360 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
361 h = yaffsfs_HandleToPointer(i);
362 fd = yaffsfs_HandleToFileDes(i);
363 obj = yaffsfs_HandleToObject(i);
364 if(h && h->useCount > 0){
368 if(fd && fd->handleCount>0 && obj && obj->my_dev == dev){
371 yaffsfs_PutInode(fd->inodeId);
381 * Stuff to handle names.
385 int yaffsfs_Match(YCHAR a, YCHAR b)
391 int yaffsfs_IsPathDivider(YCHAR ch)
393 const YCHAR *str = YAFFS_PATH_DIVIDERS;
404 int yaffsfs_CheckNameLength(const char *name)
408 int nameLength = strnlen(name,YAFFS_MAX_NAME_LENGTH+1);
411 yaffsfs_SetError(-ENOENT);
413 } else if (nameLength > YAFFS_MAX_NAME_LENGTH){
414 yaffsfs_SetError(-ENAMETOOLONG);
422 static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
424 YCHAR *alt_path = NULL;
429 * We don't have a definition for max path length.
430 * We will use 3 * max name length instead.
433 path_length = strnlen(path,(YAFFS_MAX_NAME_LENGTH+1)*3 +1);
435 /* If the last character is a path divider, then we need to
436 * trim it back so that the name look-up works properly.
437 * eg. /foo/new_dir/ -> /foo/newdir
438 * Curveball: Need to handle multiple path dividers:
439 * eg. /foof/sdfse///// -> /foo/sdfse
441 if(path_length > 0 &&
442 yaffsfs_IsPathDivider(path[path_length-1])){
443 alt_path = kmalloc(path_length + 1, 0);
446 strcpy(alt_path, path);
447 for(i = path_length-1;
448 i >= 0 && yaffsfs_IsPathDivider(alt_path[i]);
450 alt_path[i] = (YCHAR) 0;
452 *ret_path = alt_path;
457 LIST_HEAD(yaffsfs_deviceList);
462 * Scan the configuration list to find the device
463 * Curveballs: Should match paths that end in '/' too
464 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
466 static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path, YCHAR **restOfPath)
468 struct list_head *cfg;
469 const YCHAR *leftOver;
471 struct yaffs_dev *retval = NULL;
472 struct yaffs_dev *dev = NULL;
474 int longestMatch = -1;
478 * Check all configs, choose the one that:
479 * 1) Actually matches a prefix (ie /a amd /abc will not match
480 * 2) Matches the longest.
482 list_for_each(cfg, &yaffsfs_deviceList){
483 dev = list_entry(cfg, struct yaffs_dev, dev_list);
490 while(matching && *p && *leftOver){
491 /* Skip over any /s */
492 while(yaffsfs_IsPathDivider(*p))
495 /* Skip over any /s */
496 while(yaffsfs_IsPathDivider(*leftOver))
499 /* Now match the text part */
501 *p && !yaffsfs_IsPathDivider(*p) &&
502 *leftOver && !yaffsfs_IsPathDivider(*leftOver)){
503 if(yaffsfs_Match(*p,*leftOver)){
513 /* Skip over any /s in leftOver */
514 while(yaffsfs_IsPathDivider(*leftOver))
517 // Skip over any /s in p
518 while(yaffsfs_IsPathDivider(*p))
521 // p should now be at the end of the string (ie. fully matched)
525 if( matching && (thisMatchLength > longestMatch))
528 *restOfPath = (YCHAR *)leftOver;
530 longestMatch = thisMatchLength;
537 static int yaffsfs_CheckPath(const YCHAR *path)
541 while(*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100){
542 if(yaffsfs_IsPathDivider(*path)){
550 return (*path) ? -1 : 0;
553 /* FindMountPoint only returns a dev entry if the path is a mount point */
554 static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
556 struct yaffs_dev *dev;
557 YCHAR *restOfPath=NULL;
558 dev = yaffsfs_FindDevice(path,&restOfPath);
559 if(dev && restOfPath && *restOfPath)
564 static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, YCHAR **restOfPath)
567 struct yaffs_dev *dev;
569 dev= yaffsfs_FindDevice(path,restOfPath);
570 if(dev && dev->is_mounted){
571 return dev->root_dir;
576 static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
577 int symDepth, int *loop)
581 obj = yaffs_get_equivalent_obj(obj);
583 while(obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK){
584 YCHAR *alias = obj->variant.symlink_variant.alias;
586 if(yaffsfs_IsPathDivider(*alias))
587 /* Starts with a /, need to scan from root up */
588 obj = yaffsfs_FindObject(NULL,alias,symDepth++,
591 /* Relative to here, so use the parent of the symlink as a start */
592 obj = yaffsfs_FindObject(obj->parent,alias,symDepth++,
600 * yaffsfs_FindDirectory
601 * Parse a path to determine the directory and the name within the directory.
603 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
605 static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
606 const YCHAR *path, YCHAR **name, int symDepth,
607 int *notDir,int *loop)
609 struct yaffs_obj *dir;
611 YCHAR str[YAFFS_MAX_NAME_LENGTH+1];
614 if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES){
622 restOfPath = (YCHAR *)path;
625 dir = yaffsfs_FindRoot(path,&restOfPath);
631 * curve ball: also throw away surplus '/'
632 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
634 while(yaffsfs_IsPathDivider(*restOfPath))
635 restOfPath++; /* get rid of '/' */
640 while(*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)){
641 if (i < YAFFS_MAX_NAME_LENGTH){
642 str[i] = *restOfPath;
650 /* got to the end of the string */
653 if(strcmp(str,_Y(".")) == 0)
657 else if(strcmp(str,_Y("..")) == 0)
660 dir = yaffs_find_by_name(dir,str);
662 dir = yaffsfs_FollowLink(dir,symDepth,loop);
664 if(dir && dir->variant_type !=
665 YAFFS_OBJECT_TYPE_DIRECTORY){
674 /* directory did not exist. */
678 static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
685 return yaffsfs_DoFindDirectory(relDir,path,name,symDepth,notDir,loop);
689 * yaffsfs_FindObject turns a path for an existing object into the object
691 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
692 const YCHAR *path,int symDepth, int getEquiv,
693 struct yaffs_obj **dirOut, int *notDir,int *loop)
695 struct yaffs_obj *dir;
696 struct yaffs_obj *obj;
699 dir = yaffsfs_FindDirectory(relDir,path,&name,symDepth,notDir,loop);
705 obj = yaffs_find_by_name(dir,name);
710 obj = yaffs_get_equivalent_obj(obj);
716 /*************************************************************************
717 * Start of yaffsfs visible functions.
718 *************************************************************************/
720 int yaffs_dup(int handle)
722 int newHandleNumber = -1;
723 yaffsfs_FileDes *existingFD = NULL;
724 yaffsfs_Handle *existingHandle = NULL;
725 yaffsfs_Handle *newHandle = NULL;
728 existingHandle = yaffsfs_HandleToPointer(handle);
729 existingFD = yaffsfs_HandleToFileDes(handle);
731 newHandleNumber = yaffsfs_NewHandle(&newHandle);
733 newHandle->fdId = existingHandle->fdId;
734 existingFD->handleCount++;
740 yaffsfs_SetError(-EBADF);
742 yaffsfs_SetError(-ENOMEM);
744 return newHandleNumber;
750 int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
752 struct yaffs_obj *obj = NULL;
753 struct yaffs_obj *dir = NULL;
756 yaffsfs_FileDes *fd = NULL;
759 int errorReported = 0;
760 int rwflags = oflag & ( O_RDWR | O_RDONLY | O_WRONLY);
761 u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
762 u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
763 u8 sharedReadAllowed;
764 u8 sharedWriteAllowed;
773 yaffsfs_SetError(-EFAULT);
777 if(yaffsfs_CheckPath(path) < 0){
778 yaffsfs_SetError(-ENAMETOOLONG);
782 /* O_EXCL only has meaning if O_CREAT is specified */
783 if(!(oflag & O_CREAT))
786 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
787 if( (oflag & O_CREAT) & (oflag & O_EXCL))
790 /* Todo: Are there any more flag combos to sanitise ? */
792 /* Figure out if reading or writing is requested */
794 readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
795 writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
799 handle = yaffsfs_NewHandleAndFileDes();
802 yaffsfs_SetError(-ENFILE);
806 fd = yaffsfs_HandleToFileDes(handle);
808 /* try to find the exisiting object */
809 obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
811 obj = yaffsfs_FollowLink(obj,symDepth++,&loop);
814 obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
815 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
821 /* The file already exists or it might be a directory */
823 /* If it is a directory then we can't open it as a file */
824 if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
826 yaffsfs_SetError(-EISDIR);
830 /* Open should fail if O_CREAT and O_EXCL are specified since
833 if(!errorReported && (oflag & O_EXCL) && (oflag & O_CREAT)){
835 yaffsfs_SetError(-EEXIST);
839 /* Check file permissions */
840 if( readRequested && !(obj->yst_mode & S_IREAD))
843 if( writeRequested && !(obj->yst_mode & S_IWRITE))
846 if( !errorReported && writeRequested &&
847 obj->my_dev->read_only){
849 yaffsfs_SetError(-EROFS);
853 if(openDenied && !errorReported ) {
854 /* Error if the file exists but permissions are refused. */
855 yaffsfs_SetError(-EACCES);
859 /* Check sharing of an existing object. */
861 yaffsfs_FileDes *fdx;
864 sharedReadAllowed = 1;
865 sharedWriteAllowed = 1;
868 for( i = 0; i < YAFFSFS_N_HANDLES; i++){
869 fdx = &yaffsfs_fd[i];
870 if(fdx->handleCount > 0 &&
872 yaffsfs_inode[fdx->inodeId].iObj == obj){
874 sharedReadAllowed = 0;
876 sharedWriteAllowed = 0;
886 if((!sharedReadAllowed && readRequested)||
887 (!shareRead && alreadyReading) ||
888 (!sharedWriteAllowed && writeRequested) ||
889 (!shareWrite && alreadyWriting)){
891 yaffsfs_SetError(-EBUSY);
898 /* If we could not open an existing object, then let's see if
899 * the directory exists. If not, error.
901 if(!obj && !errorReported){
902 dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
904 yaffsfs_SetError(-ENOTDIR);
907 yaffsfs_SetError(-ELOOP);
910 yaffsfs_SetError(-ENOENT);
915 if(!obj && dir && !errorReported && (oflag & O_CREAT)) {
916 /* Let's see if we can create this file if it does not exist. */
917 if(dir->my_dev->read_only){
918 yaffsfs_SetError(-EROFS);
921 obj = yaffs_create_file(dir,name,mode,0,0);
923 if(!obj && !errorReported){
924 yaffsfs_SetError(-ENOSPC);
929 if(!obj && dir && !errorReported && !(oflag & O_CREAT)) {
930 /* Error if the file does not exist and CREAT is not set. */
931 yaffsfs_SetError(-ENOENT);
935 if(obj && !openDenied) {
936 int inodeId = yaffsfs_GetInodeIdForObject(obj);
940 * Todo: Fix any problem if inodes run out, though that
941 * can't happen if the number of inode items >= number of handles.
945 fd->inodeId = inodeId;
946 fd->reading = readRequested;
947 fd->writing = writeRequested;
948 fd->append = (oflag & O_APPEND) ? 1 : 0;
950 fd->shareRead = shareRead;
951 fd->shareWrite = shareWrite;
953 /* Hook inode to object */
954 obj->my_inode = (void*) &yaffsfs_inode[inodeId];
956 if((oflag & O_TRUNC) && fd->writing)
957 yaffs_resize_file(obj,0);
959 yaffsfs_PutHandle(handle);
961 yaffsfs_SetError(0); /* Problem */
971 int yaffs_open(const YCHAR *path, int oflag, int mode)
973 return yaffs_open_sharing(path, oflag, mode,
974 YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
977 int yaffs_Dofsync(int handle,int datasync)
980 struct yaffs_obj *obj;
984 obj = yaffsfs_HandleToObject(handle);
987 yaffsfs_SetError(-EBADF);
988 else if(obj->my_dev->read_only)
989 yaffsfs_SetError(-EROFS);
991 yaffs_flush_file(obj,1,datasync);
1000 int yaffs_fsync(int handle)
1002 return yaffs_Dofsync(handle,0);
1005 int yaffs_flush(int handle)
1007 return yaffs_fsync(handle);
1010 int yaffs_fdatasync(int handle)
1012 return yaffs_Dofsync(handle,1);
1015 int yaffs_close(int handle)
1017 yaffsfs_Handle *h = NULL;
1018 struct yaffs_obj *obj = NULL;
1023 h = yaffsfs_HandleToPointer(handle);
1024 obj = yaffsfs_HandleToObject(handle);
1027 yaffsfs_SetError(-EBADF);
1030 yaffs_flush_file(obj,1,0);
1031 yaffsfs_PutHandle(handle);
1042 int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, int isPread, int offset)
1044 yaffsfs_FileDes *fd = NULL;
1045 struct yaffs_obj *obj = NULL;
1052 unsigned int maxRead;
1053 u8 *buf = (u8 *)vbuf;
1056 yaffsfs_SetError(-EFAULT);
1061 fd = yaffsfs_HandleToFileDes(handle);
1062 obj = yaffsfs_HandleToObject(handle);
1066 yaffsfs_SetError(-EBADF);
1068 } else if(!fd->reading){
1069 /* Not a reading handle */
1070 yaffsfs_SetError(-EINVAL);
1072 } else if(nbyte > YAFFS_MAX_FILE_SIZE){
1073 yaffsfs_SetError(-EINVAL);
1079 startPos = fd->position;
1083 if(yaffs_get_obj_length(obj) > pos)
1084 maxRead = yaffs_get_obj_length(obj) - pos;
1092 yaffsfs_GetHandle(handle);
1094 endPos = pos + nbyte;
1096 if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1097 nbyte > YAFFS_MAX_FILE_SIZE ||
1098 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
1104 nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
1109 * Need to reverify object in case the device was
1110 * unmounted in another thread.
1112 obj = yaffsfs_HandleToObject(handle);
1116 nRead = yaffs_file_rd(obj,buf,pos,nToRead);
1124 if(nRead == nToRead)
1127 nbyte = 0; /* no more to read */
1137 yaffsfs_PutHandle(handle);
1141 fd->position = startPos + totalRead;
1143 yaffsfs_SetError(-EINVAL);
1150 return (totalRead >= 0) ? totalRead : -1;
1154 int yaffs_read(int handle, void *buf, unsigned int nbyte)
1156 return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
1159 int yaffs_pread(int handle, void *buf, unsigned int nbyte, unsigned int offset)
1161 return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
1164 int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte, int isPwrite, int offset)
1166 yaffsfs_FileDes *fd = NULL;
1167 struct yaffs_obj *obj = NULL;
1172 int totalWritten = 0;
1173 int write_trhrough = 0;
1175 const u8 *buf = (const u8 *)vbuf;
1178 yaffsfs_SetError(-EFAULT);
1183 fd = yaffsfs_HandleToFileDes(handle);
1184 obj = yaffsfs_HandleToObject(handle);
1188 yaffsfs_SetError(-EBADF);
1190 } else if(!fd->writing){
1191 yaffsfs_SetError(-EINVAL);
1193 } else if(obj->my_dev->read_only){
1194 yaffsfs_SetError(-EROFS);
1198 startPos = yaffs_get_obj_length(obj);
1202 startPos = fd->position;
1204 yaffsfs_GetHandle(handle);
1206 endPos = pos + nbyte;
1208 if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1209 nbyte > YAFFS_MAX_FILE_SIZE ||
1210 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
1217 nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
1218 if(nToWrite > nbyte)
1222 * Need to reverify object in case the device was
1223 * remounted or unmounted in another thread.
1225 obj = yaffsfs_HandleToObject(handle);
1226 if(!obj || obj->my_dev->read_only)
1229 nWritten = yaffs_wr_file(obj,buf,pos,nToWrite,
1232 totalWritten += nWritten;
1237 if(nWritten == nToWrite)
1242 if(nWritten < 1 && totalWritten < 1){
1243 yaffsfs_SetError(-ENOSPC);
1253 yaffsfs_PutHandle(handle);
1256 if(totalWritten > 0)
1257 fd->position = startPos + totalWritten;
1259 yaffsfs_SetError(-EINVAL);
1265 return (totalWritten >= 0) ? totalWritten : -1;
1268 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1270 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1273 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, unsigned int offset)
1275 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1279 int yaffs_truncate(const YCHAR *path,off_t new_size)
1281 struct yaffs_obj *obj = NULL;
1282 struct yaffs_obj *dir = NULL;
1283 int result = YAFFS_FAIL;
1288 yaffsfs_SetError(-EFAULT);
1292 if(yaffsfs_CheckPath(path) < 0){
1293 yaffsfs_SetError(-ENAMETOOLONG);
1299 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1300 obj = yaffsfs_FollowLink(obj,0,&loop);
1303 yaffsfs_SetError(-ENOTDIR);
1305 yaffsfs_SetError(-ELOOP);
1306 else if(!dir || !obj)
1307 yaffsfs_SetError(-ENOENT);
1308 else if(obj->my_dev->read_only)
1309 yaffsfs_SetError(-EROFS);
1310 else if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1311 yaffsfs_SetError(-EISDIR);
1312 else if(obj->my_dev->read_only)
1313 yaffsfs_SetError(-EROFS);
1314 else if(new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1315 yaffsfs_SetError(-EINVAL);
1317 result = yaffs_resize_file(obj,new_size);
1321 return (result) ? 0 : -1;
1324 int yaffs_ftruncate(int handle, off_t new_size)
1326 yaffsfs_FileDes *fd = NULL;
1327 struct yaffs_obj *obj = NULL;
1331 fd = yaffsfs_HandleToFileDes(handle);
1332 obj = yaffsfs_HandleToObject(handle);
1336 yaffsfs_SetError(-EBADF);
1337 else if(!fd->writing)
1338 yaffsfs_SetError(-EINVAL);
1339 else if(obj->my_dev->read_only)
1340 yaffsfs_SetError(-EROFS);
1341 else if( new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1342 yaffsfs_SetError(-EINVAL);
1344 /* resize the file */
1345 result = yaffs_resize_file(obj,new_size);
1348 return (result) ? 0 : -1;
1352 off_t yaffs_lseek(int handle, off_t offset, int whence)
1354 yaffsfs_FileDes *fd = NULL;
1355 struct yaffs_obj *obj = NULL;
1360 fd = yaffsfs_HandleToFileDes(handle);
1361 obj = yaffsfs_HandleToObject(handle);
1364 yaffsfs_SetError(-EBADF);
1365 else if(offset > YAFFS_MAX_FILE_SIZE)
1366 yaffsfs_SetError(-EINVAL);
1368 if(whence == SEEK_SET){
1371 } else if(whence == SEEK_CUR) {
1372 if( (fd->position + offset) >= 0)
1373 pos = (fd->position + offset);
1374 } else if(whence == SEEK_END) {
1375 fSize = yaffs_get_obj_length(obj);
1376 if(fSize >= 0 && (fSize + offset) >= 0)
1377 pos = fSize + offset;
1380 if(pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1383 yaffsfs_SetError(-EINVAL);
1394 int yaffsfs_DoUnlink(const YCHAR *path,int isDirectory)
1396 struct yaffs_obj *dir = NULL;
1397 struct yaffs_obj *obj = NULL;
1399 int result = YAFFS_FAIL;
1404 yaffsfs_SetError(-EFAULT);
1408 if(yaffsfs_CheckPath(path) < 0){
1409 yaffsfs_SetError(-ENAMETOOLONG);
1415 obj = yaffsfs_FindObject(NULL,path,0,0,NULL,NULL,NULL);
1416 dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
1419 yaffsfs_SetError(-ENOTDIR);
1421 yaffsfs_SetError(-ELOOP);
1423 yaffsfs_SetError(-ENOENT);
1424 else if(strncmp(name,_Y("."),2) == 0)
1425 yaffsfs_SetError(-EINVAL);
1427 yaffsfs_SetError(-ENOENT);
1428 else if(obj->my_dev->read_only)
1429 yaffsfs_SetError(-EROFS);
1430 else if(!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1431 yaffsfs_SetError(-EISDIR);
1432 else if(isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1433 yaffsfs_SetError(-ENOTDIR);
1434 else if(isDirectory && obj == obj->my_dev->root_dir)
1435 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1437 result = yaffs_unlinker(dir,name);
1439 if(result == YAFFS_FAIL && isDirectory)
1440 yaffsfs_SetError(-ENOTEMPTY);
1445 return (result == YAFFS_FAIL) ? -1 : 0;
1449 int yaffs_unlink(const YCHAR *path)
1451 return yaffsfs_DoUnlink(path,0);
1454 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1456 struct yaffs_obj *olddir = NULL;
1457 struct yaffs_obj *newdir = NULL;
1458 struct yaffs_obj *obj = NULL;
1459 struct yaffs_obj *newobj = NULL;
1462 int result= YAFFS_FAIL;
1463 int rename_allowed = 1;
1469 YCHAR *alt_newpath=NULL;
1471 if(!oldPath || !newPath){
1472 yaffsfs_SetError(-EFAULT);
1476 if(yaffsfs_CheckPath(oldPath) < 0 ||
1477 yaffsfs_CheckPath(newPath) < 0){
1478 yaffsfs_SetError(-ENAMETOOLONG);
1482 if(yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0){
1483 yaffsfs_SetError(-ENOMEM);
1487 newPath = alt_newpath;
1492 olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0,¬OldDir,&oldLoop);
1493 newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0,¬NewDir,&newLoop);
1494 obj = yaffsfs_FindObject(NULL,oldPath,0,0,NULL,NULL,NULL);
1495 newobj = yaffsfs_FindObject(NULL,newPath,0,0,NULL,NULL,NULL);
1497 /* If the object being renamed is a directory and the
1498 * path ended with a "/" then the olddir == obj.
1499 * We pass through NULL for the old name to tell the lower layers
1500 * to use olddir as the object.
1506 if((!olddir && notOldDir) || (!newdir && notNewDir)) {
1507 yaffsfs_SetError(-ENOTDIR);
1509 } else if(oldLoop || newLoop) {
1510 yaffsfs_SetError(-ELOOP);
1512 } else if (olddir && oldname && strncmp(oldname, _Y("."),2) == 0){
1513 yaffsfs_SetError(-EINVAL);
1515 }else if(!olddir || !newdir || !obj) {
1516 yaffsfs_SetError(-ENOENT);
1518 } else if(obj->my_dev->read_only){
1519 yaffsfs_SetError(-EROFS);
1521 } else if(yaffs_is_non_empty_dir(newobj)){
1522 yaffsfs_SetError(-ENOTEMPTY);
1524 } else if(olddir->my_dev != newdir->my_dev) {
1525 /* Rename must be on same device */
1526 yaffsfs_SetError(-EXDEV);
1528 } else if(obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1530 * It is a directory, check that it is not being renamed to
1531 * being its own decendent.
1532 * Do this by tracing from the new directory back to the root,
1536 struct yaffs_obj *xx = newdir;
1538 while( rename_allowed && xx){
1544 yaffsfs_SetError(-EINVAL);
1548 result = yaffs_rename_obj(olddir,oldname,newdir,newname);
1555 return (result == YAFFS_FAIL) ? -1 : 0;
1559 static int yaffsfs_DoStat(struct yaffs_obj *obj,struct yaffs_stat *buf)
1563 obj = yaffs_get_equivalent_obj(obj);
1566 buf->st_dev = (int)obj->my_dev->os_context;
1567 buf->st_ino = obj->obj_id;
1568 buf->st_mode = obj->yst_mode & ~S_IFMT; /* clear out file type bits */
1570 if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1571 buf->st_mode |= S_IFDIR;
1572 else if(obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1573 buf->st_mode |= S_IFLNK;
1574 else if(obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1575 buf->st_mode |= S_IFREG;
1577 buf->st_nlink = yaffs_get_obj_link_count(obj);
1580 buf->st_rdev = obj->yst_rdev;
1581 buf->st_size = yaffs_get_obj_length(obj);
1582 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1583 buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
1584 #if CONFIG_YAFFS_WINCE
1585 buf->yst_wince_atime[0] = obj->win_atime[0];
1586 buf->yst_wince_atime[1] = obj->win_atime[1];
1587 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1588 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1589 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1590 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1592 buf->yst_atime = obj->yst_atime;
1593 buf->yst_ctime = obj->yst_ctime;
1594 buf->yst_mtime = obj->yst_mtime;
1601 static int yaffsfs_DoStatOrLStat(const YCHAR *path, struct yaffs_stat *buf,int doLStat)
1603 struct yaffs_obj *obj=NULL;
1604 struct yaffs_obj *dir=NULL;
1610 yaffsfs_SetError(-EFAULT);
1614 if(yaffsfs_CheckPath(path) < 0){
1615 yaffsfs_SetError(-ENAMETOOLONG);
1621 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1624 obj = yaffsfs_FollowLink(obj,0,&loop);
1627 yaffsfs_SetError(-ENOTDIR);
1629 yaffsfs_SetError(-ELOOP);
1630 else if(!dir || !obj)
1631 yaffsfs_SetError(-ENOENT);
1633 retVal = yaffsfs_DoStat(obj,buf);
1641 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1643 return yaffsfs_DoStatOrLStat(path,buf,0);
1646 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1648 return yaffsfs_DoStatOrLStat(path,buf,1);
1651 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1653 struct yaffs_obj *obj;
1658 yaffsfs_SetError(-EFAULT);
1663 obj = yaffsfs_HandleToObject(fd);
1666 retVal = yaffsfs_DoStat(obj,buf);
1669 yaffsfs_SetError(-EBADF);
1676 #ifndef CONFIG_YAFFS_WINCE
1677 /* xattrib functions */
1680 static int yaffs_do_setxattr(const YCHAR *path, const char *name,
1681 const void *data, int size, int flags, int follow)
1683 struct yaffs_obj *obj;
1684 struct yaffs_obj *dir;
1690 if(!path || !name || !data){
1691 yaffsfs_SetError(-EFAULT);
1695 if(yaffsfs_CheckPath(path) < 0){
1696 yaffsfs_SetError(-ENAMETOOLONG);
1702 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1705 obj = yaffsfs_FollowLink(obj,0,&loop);
1708 yaffsfs_SetError(-ENOTDIR);
1710 yaffsfs_SetError(-ELOOP);
1711 else if(!dir || !obj)
1712 yaffsfs_SetError(-ENOENT);
1714 retVal = yaffs_set_xattrib(obj,name,data,size,flags);
1716 yaffsfs_SetError(retVal);
1727 int yaffs_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1729 return yaffs_do_setxattr(path, name, data, size, flags, 1);
1732 int yaffs_lsetxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1734 return yaffs_do_setxattr(path, name, data, size, flags, 0);
1739 int yaffs_fsetxattr(int fd, const char *name, const void *data, int size, int flags)
1741 struct yaffs_obj *obj;
1746 yaffsfs_SetError(-EFAULT);
1751 obj = yaffsfs_HandleToObject(fd);
1754 yaffsfs_SetError(-EBADF);
1756 retVal = yaffs_set_xattrib(obj,name,data,size,flags);
1758 yaffsfs_SetError(retVal);
1768 static int yaffs_do_getxattr(const YCHAR *path, const char *name, void *data, int size, int follow)
1770 struct yaffs_obj *obj;
1771 struct yaffs_obj *dir;
1776 if(!path || !name || !data ){
1777 yaffsfs_SetError(-EFAULT);
1781 if(yaffsfs_CheckPath(path) < 0){
1782 yaffsfs_SetError(-ENAMETOOLONG);
1788 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1791 obj = yaffsfs_FollowLink(obj,0,&loop);
1794 yaffsfs_SetError(-ENOTDIR);
1796 yaffsfs_SetError(-ELOOP);
1797 else if(!dir || !obj)
1798 yaffsfs_SetError(-ENOENT);
1800 retVal = yaffs_get_xattrib(obj,name,data,size);
1802 yaffsfs_SetError(retVal);
1812 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
1814 return yaffs_do_getxattr( path, name, data, size, 1);
1816 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
1818 return yaffs_do_getxattr( path, name, data, size, 0);
1823 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
1825 struct yaffs_obj *obj;
1829 if(!name || !data ){
1830 yaffsfs_SetError(-EFAULT);
1835 obj = yaffsfs_HandleToObject(fd);
1838 retVal = yaffs_get_xattrib(obj,name,data,size);
1840 yaffsfs_SetError(retVal);
1845 yaffsfs_SetError(-EBADF);
1852 static int yaffs_do_listxattr(const YCHAR *path, char *data, int size, int follow)
1854 struct yaffs_obj *obj=NULL;
1855 struct yaffs_obj *dir=NULL;
1860 if(!path || !data ){
1861 yaffsfs_SetError(-EFAULT);
1865 if(yaffsfs_CheckPath(path) < 0){
1866 yaffsfs_SetError(-ENAMETOOLONG);
1872 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1875 obj = yaffsfs_FollowLink(obj,0,&loop);
1878 yaffsfs_SetError(-ENOTDIR);
1880 yaffsfs_SetError(-ELOOP);
1881 else if(!dir || !obj)
1882 yaffsfs_SetError(-ENOENT);
1884 retVal = yaffs_list_xattrib(obj, data,size);
1886 yaffsfs_SetError(retVal);
1897 int yaffs_listxattr(const YCHAR *path, char *data, int size)
1899 return yaffs_do_listxattr(path, data, size, 1);
1902 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
1904 return yaffs_do_listxattr(path, data, size, 0);
1907 int yaffs_flistxattr(int fd, char *data, int size)
1909 struct yaffs_obj *obj;
1914 yaffsfs_SetError(-EFAULT);
1919 obj = yaffsfs_HandleToObject(fd);
1922 retVal = yaffs_list_xattrib(obj,data,size);
1924 yaffsfs_SetError(retVal);
1929 yaffsfs_SetError(-EBADF);
1936 static int yaffs_do_removexattr(const YCHAR *path, const char *name, int follow)
1938 struct yaffs_obj *obj=NULL;
1939 struct yaffs_obj *dir=NULL;
1945 yaffsfs_SetError(-EFAULT);
1949 if(yaffsfs_CheckPath(path) < 0){
1950 yaffsfs_SetError(-ENAMETOOLONG);
1956 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
1959 obj = yaffsfs_FollowLink(obj,0,&loop);
1962 yaffsfs_SetError(-ENOTDIR);
1964 yaffsfs_SetError(-ELOOP);
1965 else if(!dir || !obj)
1966 yaffsfs_SetError(-ENOENT);
1968 retVal = yaffs_remove_xattrib(obj,name);
1970 yaffsfs_SetError(retVal);
1981 int yaffs_removexattr(const YCHAR *path, const char *name)
1983 return yaffs_do_removexattr(path, name, 1);
1986 int yaffs_lremovexattr(const YCHAR *path, const char *name)
1988 return yaffs_do_removexattr(path, name, 0);
1991 int yaffs_fremovexattr(int fd, const char *name)
1993 struct yaffs_obj *obj;
1998 yaffsfs_SetError(-EFAULT);
2003 obj = yaffsfs_HandleToObject(fd);
2006 retVal = yaffs_remove_xattrib(obj,name);
2008 yaffsfs_SetError(retVal);
2013 yaffsfs_SetError(-EBADF);
2021 #ifdef CONFIG_YAFFS_WINCE
2022 int yaffs_get_wince_times(int fd, unsigned *wctime, unsigned *watime, unsigned *wmtime)
2024 struct yaffs_obj *obj;
2029 obj = yaffsfs_HandleToObject(fd);
2034 wctime[0] = obj->win_ctime[0];
2035 wctime[1] = obj->win_ctime[1];
2038 watime[0] = obj->win_atime[0];
2039 watime[1] = obj->win_atime[1];
2042 wmtime[0] = obj->win_mtime[0];
2043 wmtime[1] = obj->win_mtime[1];
2050 yaffsfs_SetError(-EBADF);
2058 int yaffs_set_wince_times(int fd,
2059 const unsigned *wctime,
2060 const unsigned *watime,
2061 const unsigned *wmtime)
2063 struct yaffs_obj *obj;
2068 obj = yaffsfs_HandleToObject(fd);
2073 obj->win_ctime[0] = wctime[0];
2074 obj->win_ctime[1] = wctime[1];
2077 obj->win_atime[0] = watime[0];
2078 obj->win_atime[1] = watime[1];
2081 obj->win_mtime[0] = wmtime[0];
2082 obj->win_mtime[1] = wmtime[1];
2086 result = yaffs_flush_file(obj,0,0);
2090 yaffsfs_SetError(-EBADF);
2100 static int yaffsfs_DoChMod(struct yaffs_obj *obj,mode_t mode)
2105 obj = yaffs_get_equivalent_obj(obj);
2108 obj->yst_mode = mode;
2110 result = yaffs_flush_file(obj,0,0);
2113 return result == YAFFS_OK ? 0 : -1;
2117 int yaffs_access(const YCHAR *path, int amode)
2119 struct yaffs_obj *obj=NULL;
2120 struct yaffs_obj *dir=NULL;
2126 yaffsfs_SetError(-EFAULT);
2130 if(yaffsfs_CheckPath(path) < 0){
2131 yaffsfs_SetError(-ENAMETOOLONG);
2135 if(amode & ~(R_OK | W_OK | X_OK)){
2136 yaffsfs_SetError(-EINVAL);
2142 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
2143 obj = yaffsfs_FollowLink(obj,0,&loop);
2146 yaffsfs_SetError(-ENOTDIR);
2148 yaffsfs_SetError(-ELOOP);
2149 else if(!dir || !obj)
2150 yaffsfs_SetError(-ENOENT);
2151 else if((amode & W_OK) && obj->my_dev->read_only)
2152 yaffsfs_SetError(-EROFS);
2156 if((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2158 if((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2160 if((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2164 yaffsfs_SetError(-EACCES);
2176 int yaffs_chmod(const YCHAR *path, mode_t mode)
2178 struct yaffs_obj *obj=NULL;
2179 struct yaffs_obj *dir=NULL;
2185 yaffsfs_SetError(-EFAULT);
2189 if(yaffsfs_CheckPath(path) < 0){
2190 yaffsfs_SetError(-ENAMETOOLONG);
2195 yaffsfs_SetError(-EINVAL);
2201 obj = yaffsfs_FindObject(NULL,path,0,1, &dir, ¬Dir,&loop);
2202 obj = yaffsfs_FollowLink(obj,0,&loop);
2205 yaffsfs_SetError(-ENOTDIR);
2207 yaffsfs_SetError(-ELOOP);
2208 else if(!dir || !obj)
2209 yaffsfs_SetError(-ENOENT);
2210 else if(obj->my_dev->read_only)
2211 yaffsfs_SetError(-EROFS);
2213 retVal = yaffsfs_DoChMod(obj,mode);
2222 int yaffs_fchmod(int fd, mode_t mode)
2224 struct yaffs_obj *obj;
2228 yaffsfs_SetError(-EINVAL);
2233 obj = yaffsfs_HandleToObject(fd);
2236 yaffsfs_SetError(-EBADF);
2237 else if(obj->my_dev->read_only)
2238 yaffsfs_SetError(-EROFS);
2240 retVal = yaffsfs_DoChMod(obj,mode);
2247 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2249 struct yaffs_obj *parent = NULL;
2250 struct yaffs_obj *dir = NULL;
2252 YCHAR *alt_path = NULL;
2258 yaffsfs_SetError(-EFAULT);
2262 if(yaffsfs_CheckPath(path) < 0){
2263 yaffsfs_SetError(-ENAMETOOLONG);
2267 if(yaffsfs_alt_dir_path(path, &alt_path) < 0){
2268 yaffsfs_SetError(-ENOMEM);
2275 parent = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
2276 if(!parent && notDir)
2277 yaffsfs_SetError(-ENOTDIR);
2279 yaffsfs_SetError(-ELOOP);
2281 yaffsfs_SetError(-ENOENT);
2282 else if(strnlen(name,5) == 0){
2283 /* Trying to make the root itself */
2284 yaffsfs_SetError(-EEXIST);
2285 } else if(parent->my_dev->read_only)
2286 yaffsfs_SetError(-EROFS);
2288 dir = yaffs_create_dir(parent,name,mode,0,0);
2291 else if (yaffs_find_by_name(parent,name))
2292 yaffsfs_SetError(-EEXIST); /* the name already exists */
2294 yaffsfs_SetError(-ENOSPC); /* just assume no space */
2305 int yaffs_rmdir(const YCHAR *path)
2311 yaffsfs_SetError(-EFAULT);
2315 if(yaffsfs_CheckPath(path) < 0){
2316 yaffsfs_SetError(-ENAMETOOLONG);
2320 if(yaffsfs_alt_dir_path(path, &alt_path) < 0){
2321 yaffsfs_SetError(-ENOMEM);
2326 result = yaffsfs_DoUnlink(path,1);
2333 void * yaffs_getdev(const YCHAR *path)
2335 struct yaffs_dev *dev=NULL;
2337 dev = yaffsfs_FindDevice(path,&dummy);
2341 int yaffs_mount2(const YCHAR *path,int read_only)
2344 int result=YAFFS_FAIL;
2345 struct yaffs_dev *dev=NULL;
2348 yaffsfs_SetError(-EFAULT);
2352 yaffs_trace(YAFFS_TRACE_MOUNT,"yaffs: Mounting %s",path);
2354 if(yaffsfs_CheckPath(path) < 0){
2355 yaffsfs_SetError(-ENAMETOOLONG);
2361 yaffsfs_InitHandles();
2363 dev = yaffsfs_FindMountPoint(path);
2365 if(!dev->is_mounted){
2366 dev->read_only = read_only ? 1 : 0;
2367 result = yaffs_guts_initialise(dev);
2368 if(result == YAFFS_FAIL)
2369 yaffsfs_SetError(-ENOMEM);
2370 retVal = result ? 0 : -1;
2374 yaffsfs_SetError(-EBUSY);
2376 yaffsfs_SetError(-ENODEV);
2383 int yaffs_mount(const YCHAR *path)
2385 return yaffs_mount2(path,0);
2388 int yaffs_sync(const YCHAR *path)
2391 struct yaffs_dev *dev=NULL;
2395 yaffsfs_SetError(-EFAULT);
2399 if(yaffsfs_CheckPath(path) < 0){
2400 yaffsfs_SetError(-ENAMETOOLONG);
2405 dev = yaffsfs_FindDevice(path,&dummy);
2407 if(!dev->is_mounted)
2408 yaffsfs_SetError(-EINVAL);
2409 else if(dev->read_only)
2410 yaffsfs_SetError(-EROFS);
2413 yaffs_flush_whole_cache(dev);
2414 yaffs_checkpoint_save(dev);
2419 yaffsfs_SetError(-ENODEV);
2426 static int yaffsfs_IsDevBusy(struct yaffs_dev * dev)
2429 struct yaffs_obj *obj;
2431 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
2432 obj = yaffsfs_HandleToObject(i);
2433 if(obj && obj->my_dev == dev)
2440 int yaffs_remount(const YCHAR *path, int force, int read_only)
2443 struct yaffs_dev *dev=NULL;
2446 yaffsfs_SetError(-EFAULT);
2450 if(yaffsfs_CheckPath(path) < 0){
2451 yaffsfs_SetError(-ENAMETOOLONG);
2456 dev = yaffsfs_FindMountPoint(path);
2458 if(dev->is_mounted){
2459 yaffs_flush_whole_cache(dev);
2461 if(force || ! yaffsfs_IsDevBusy(dev)){
2463 yaffs_checkpoint_save(dev);
2464 dev->read_only = read_only ? 1 : 0;
2467 yaffsfs_SetError(-EBUSY);
2470 yaffsfs_SetError(-EINVAL);
2474 yaffsfs_SetError(-ENODEV);
2481 int yaffs_unmount2(const YCHAR *path, int force)
2484 struct yaffs_dev *dev=NULL;
2487 yaffsfs_SetError(-EFAULT);
2491 if(yaffsfs_CheckPath(path) < 0){
2492 yaffsfs_SetError(-ENAMETOOLONG);
2497 dev = yaffsfs_FindMountPoint(path);
2499 if(dev->is_mounted){
2501 yaffs_flush_whole_cache(dev);
2502 yaffs_checkpoint_save(dev);
2503 inUse = yaffsfs_IsDevBusy(dev);
2504 if(!inUse || force){
2506 yaffsfs_BreakDeviceHandles(dev);
2507 yaffs_deinitialise(dev);
2511 yaffsfs_SetError(-EBUSY);
2514 yaffsfs_SetError(-EINVAL);
2517 yaffsfs_SetError(-ENODEV);
2524 int yaffs_unmount(const YCHAR *path)
2526 return yaffs_unmount2(path,0);
2529 loff_t yaffs_freespace(const YCHAR *path)
2532 struct yaffs_dev *dev=NULL;
2536 yaffsfs_SetError(-EFAULT);
2540 if(yaffsfs_CheckPath(path) < 0){
2541 yaffsfs_SetError(-ENAMETOOLONG);
2546 dev = yaffsfs_FindDevice(path,&dummy);
2547 if(dev && dev->is_mounted){
2548 retVal = yaffs_get_n_free_chunks(dev);
2549 retVal *= dev->data_bytes_per_chunk;
2552 yaffsfs_SetError(-EINVAL);
2558 loff_t yaffs_totalspace(const YCHAR *path)
2561 struct yaffs_dev *dev=NULL;
2565 yaffsfs_SetError(-EFAULT);
2569 if(yaffsfs_CheckPath(path) < 0){
2570 yaffsfs_SetError(-ENAMETOOLONG);
2575 dev = yaffsfs_FindDevice(path,&dummy);
2576 if(dev && dev->is_mounted){
2577 retVal = (dev->param.end_block - dev->param.start_block + 1) -
2578 dev->param.n_reserved_blocks;
2579 retVal *= dev->param.chunks_per_block;
2580 retVal *= dev->data_bytes_per_chunk;
2583 yaffsfs_SetError(-EINVAL);
2589 int yaffs_inodecount(const YCHAR *path)
2592 struct yaffs_dev *dev=NULL;
2596 yaffsfs_SetError(-EFAULT);
2600 if(yaffsfs_CheckPath(path) < 0){
2601 yaffsfs_SetError(-ENAMETOOLONG);
2606 dev = yaffsfs_FindDevice(path,&dummy);
2607 if(dev && dev->is_mounted) {
2608 int n_obj = dev->n_obj;
2609 if(n_obj > dev->n_hardlinks)
2610 retVal = n_obj - dev->n_hardlinks;
2614 yaffsfs_SetError(-EINVAL);
2621 void yaffs_add_device(struct yaffs_dev *dev)
2623 dev->is_mounted = 0;
2624 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
2626 if(!dev->dev_list.next)
2627 INIT_LIST_HEAD(&dev->dev_list);
2629 list_add(&dev->dev_list,&yaffsfs_deviceList);
2632 void yaffs_remove_device(struct yaffs_dev *dev)
2634 list_del_init(&dev->dev_list);
2640 /* Directory search stuff. */
2643 * Directory search context
2645 * NB this is an opaque structure.
2652 yaffs_dirent de; /* directory entry being used by this dsc */
2653 YCHAR name[NAME_MAX+1]; /* name of directory being searched */
2654 struct yaffs_obj *dirObj; /* ptr to directory being searched */
2655 struct yaffs_obj *nextReturn; /* obj to be returned by next readddir */
2657 struct list_head others;
2658 } yaffsfs_DirectorySearchContext;
2662 static struct list_head search_contexts;
2665 static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc)
2669 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
2673 if( list_empty(&dsc->dirObj->variant.dir_variant.children))
2674 dsc->nextReturn = NULL;
2676 dsc->nextReturn = list_entry(dsc->dirObj->variant.dir_variant.children.next,
2677 struct yaffs_obj,siblings);
2679 /* Hey someone isn't playing nice! */
2683 static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc)
2687 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
2689 if( dsc->nextReturn == NULL ||
2690 list_empty(&dsc->dirObj->variant.dir_variant.children))
2691 dsc->nextReturn = NULL;
2693 struct list_head *next = dsc->nextReturn->siblings.next;
2695 if( next == &dsc->dirObj->variant.dir_variant.children)
2696 dsc->nextReturn = NULL; /* end of list */
2698 dsc->nextReturn = list_entry(next,struct yaffs_obj,siblings);
2701 /* Hey someone isn't playing nice! */
2705 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
2708 struct list_head *i;
2709 yaffsfs_DirectorySearchContext *dsc;
2711 /* if search contexts not initilised then skip */
2712 if(!search_contexts.next)
2715 /* Iterate through the directory search contexts.
2716 * If any are the one being removed, then advance the dsc to
2717 * the next one to prevent a hanging ptr.
2719 list_for_each(i, &search_contexts) {
2721 dsc = list_entry(i, yaffsfs_DirectorySearchContext,others);
2722 if(dsc->nextReturn == obj)
2723 yaffsfs_DirAdvance(dsc);
2729 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
2731 yaffs_DIR *dir = NULL;
2732 struct yaffs_obj *obj = NULL;
2733 yaffsfs_DirectorySearchContext *dsc = NULL;
2738 yaffsfs_SetError(-EFAULT);
2742 if(yaffsfs_CheckPath(dirname) < 0){
2743 yaffsfs_SetError(-ENAMETOOLONG);
2749 obj = yaffsfs_FindObject(NULL,dirname,0,1,NULL,¬Dir,&loop);
2752 yaffsfs_SetError(-ENOTDIR);
2754 yaffsfs_SetError(-ELOOP);
2756 yaffsfs_SetError(-ENOENT);
2757 else if(obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
2758 yaffsfs_SetError(-ENOTDIR);
2761 dsc = kmalloc(sizeof(yaffsfs_DirectorySearchContext), 0);
2762 dir = (yaffs_DIR *)dsc;
2765 memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext));
2766 dsc->magic = YAFFS_MAGIC;
2768 strncpy(dsc->name,dirname,NAME_MAX);
2769 INIT_LIST_HEAD(&dsc->others);
2771 if(!search_contexts.next)
2772 INIT_LIST_HEAD(&search_contexts);
2774 list_add(&dsc->others,&search_contexts);
2775 yaffsfs_SetDirRewound(dsc);
2785 struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp)
2787 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2788 struct yaffs_dirent *retVal = NULL;
2792 if(dsc && dsc->magic == YAFFS_MAGIC){
2793 yaffsfs_SetError(0);
2794 if(dsc->nextReturn){
2795 dsc->de.d_ino = yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
2796 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
2797 dsc->de.d_off = dsc->offset++;
2798 yaffs_get_obj_name(dsc->nextReturn,dsc->de.d_name,NAME_MAX);
2799 if(strnlen(dsc->de.d_name,NAME_MAX+1) == 0)
2801 /* this should not happen! */
2802 strcpy(dsc->de.d_name,_Y("zz"));
2804 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
2806 yaffsfs_DirAdvance(dsc);
2810 yaffsfs_SetError(-EBADF);
2819 void yaffs_rewinddir(yaffs_DIR *dirp)
2821 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2825 yaffsfs_SetDirRewound(dsc);
2831 int yaffs_closedir(yaffs_DIR *dirp)
2833 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2836 yaffsfs_SetError(-EFAULT);
2842 list_del(&dsc->others); /* unhook from list */
2848 /* End of directory stuff */
2851 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
2853 struct yaffs_obj *parent = NULL;
2854 struct yaffs_obj *obj;
2857 int mode = 0; /* ignore for now */
2861 if(!oldpath || !newpath){
2862 yaffsfs_SetError(-EFAULT);
2866 if(yaffsfs_CheckPath(newpath) < 0 ||
2867 yaffsfs_CheckPath(oldpath) < 0){
2868 yaffsfs_SetError(-ENAMETOOLONG);
2873 parent = yaffsfs_FindDirectory(NULL,newpath,&name,0,¬Dir,&loop);
2874 if(!parent && notDir)
2875 yaffsfs_SetError(-ENOTDIR);
2877 yaffsfs_SetError(-ELOOP);
2878 else if( !parent || strnlen(name,5) < 1)
2879 yaffsfs_SetError(-ENOENT);
2880 else if(parent->my_dev->read_only)
2881 yaffsfs_SetError(-EROFS);
2883 obj = yaffs_create_symlink(parent,name,mode,0,0,oldpath);
2886 else if (yaffsfs_FindObject(NULL,newpath,0,0, NULL,NULL,NULL))
2887 yaffsfs_SetError(-EEXIST);
2889 yaffsfs_SetError(-ENOSPC);
2898 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
2900 struct yaffs_obj *obj = NULL;
2901 struct yaffs_obj *dir = NULL;
2907 yaffsfs_SetError(-EFAULT);
2913 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
2916 yaffsfs_SetError(-ENOTDIR);
2918 yaffsfs_SetError(-ELOOP);
2919 else if(!dir || !obj)
2920 yaffsfs_SetError(-ENOENT);
2921 else if(obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
2922 yaffsfs_SetError(-EINVAL);
2924 YCHAR *alias = obj->variant.symlink_variant.alias;
2925 memset(buf,0,bufsiz);
2926 strncpy(buf,alias,bufsiz - 1);
2933 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
2935 /* Creates a link called newpath to existing oldpath */
2936 struct yaffs_obj *obj = NULL;
2937 struct yaffs_obj *lnk = NULL;
2938 struct yaffs_obj *obj_dir = NULL;
2939 struct yaffs_obj *lnk_dir = NULL;
2947 if(!oldpath || !linkpath){
2948 yaffsfs_SetError(-EFAULT);
2952 if(yaffsfs_CheckPath(linkpath) < 0 ||
2953 yaffsfs_CheckPath(oldpath) < 0){
2954 yaffsfs_SetError(-ENAMETOOLONG);
2960 obj = yaffsfs_FindObject(NULL,oldpath,0,1,&obj_dir,¬DirObj,&objLoop);
2961 lnk = yaffsfs_FindObject(NULL,linkpath,0,0,NULL,NULL,NULL);
2962 lnk_dir = yaffsfs_FindDirectory(NULL,linkpath,&newname,0,¬DirLnk,&lnkLoop);
2964 if((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
2965 yaffsfs_SetError(-ENOTDIR);
2966 else if(objLoop || lnkLoop)
2967 yaffsfs_SetError(-ELOOP);
2968 else if(!obj_dir || !lnk_dir || !obj)
2969 yaffsfs_SetError(-ENOENT);
2970 else if(obj->my_dev->read_only)
2971 yaffsfs_SetError(-EROFS);
2973 yaffsfs_SetError(-EEXIST);
2974 else if(lnk_dir->my_dev != obj->my_dev)
2975 yaffsfs_SetError(-EXDEV);
2977 retVal = yaffsfs_CheckNameLength(newname);
2980 lnk = yaffs_link_obj(lnk_dir,newname,obj);
2984 yaffsfs_SetError(-ENOSPC);
2994 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
3000 yaffsfs_SetError(-EINVAL);
3006 * D E B U G F U N C T I O N S
3011 * Returns number of handles attached to the object
3013 int yaffs_n_handles(const YCHAR *path)
3015 struct yaffs_obj *obj;
3018 yaffsfs_SetError(-EFAULT);
3022 if(yaffsfs_CheckPath(path) < 0){
3023 yaffsfs_SetError(-ENAMETOOLONG);
3027 obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
3030 return yaffsfs_CountHandles(obj);
3035 int yaffs_get_error(void)
3037 return yaffsfs_GetLastError();
3040 int yaffs_set_error(int error)
3042 yaffsfs_SetError(error);
3046 int yaffs_dump_dev(const YCHAR *path)
3053 struct yaffs_obj *obj = yaffsfs_FindRoot(path,&rest);
3056 struct yaffs_dev *dev = obj->my_dev;
3059 "n_page_writes.......... %d\n"
3060 "n_page_reads........... %d\n"
3061 "n_erasures....... %d\n"
3062 "n_gc_copies............ %d\n"
3063 "garbageCollections... %d\n"
3064 "passiveGarbageColl'ns %d\n"
3070 dev->garbageCollections,
3071 dev->passiveGarbageCollections