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 handles in yaffsfs_Handle.
49 * Things are structured this way to be like the Linux VFS model
50 * so that interactions with the yaffs guts calls are similar.
51 * That means more common code paths and less special code.
52 * That means better testing etc.
56 int count; /* Number of handles accessing this inode */
57 struct yaffs_obj *iObj;
66 int inodeId:12; /* Index to corresponding yaffsfs_Inode */
67 int useCount:10; /* Use count for this handle */
68 u32 position; /* current position in file */
71 static yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
72 static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
73 static int yaffsfs_handlesInitialised;
76 unsigned yaffs_set_trace(unsigned tm)
78 yaffs_trace_mask = tm;
79 return yaffs_trace_mask;
82 unsigned yaffs_get_trace(void)
84 return yaffs_trace_mask;
89 * Inilitalise handle management on start-up.
92 static void yaffsfs_InitHandles(void)
95 if(yaffsfs_handlesInitialised)
98 memset(yaffsfs_inode,0,sizeof(yaffsfs_inode));
99 memset(yaffsfs_handle,0,sizeof(yaffsfs_handle));
100 for(i = 0; i < YAFFSFS_N_HANDLES; i++)
101 yaffsfs_handle[i].inodeId = -1;
104 yaffsfs_Handle *yaffsfs_GetHandlePointer(int h)
106 if(h < 0 || h >= YAFFSFS_N_HANDLES)
109 return &yaffsfs_handle[h];
112 yaffsfs_Inode *yaffsfs_GetInodePointer(int handle)
114 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
116 if(h && h->useCount > 0 && h->inodeId >= 0 && h->inodeId < YAFFSFS_N_HANDLES)
117 return &yaffsfs_inode[h->inodeId];
122 struct yaffs_obj *yaffsfs_GetHandleObject(int handle)
124 yaffsfs_Inode *in = yaffsfs_GetInodePointer(handle);
133 * yaffsfs_FindInodeIdForObject
134 * Find the inode entry for an object, if it exists.
137 static int yaffsfs_FindInodeIdForObject(struct yaffs_obj *obj)
143 obj = yaffs_get_equivalent_obj(obj);
145 /* Look for it in open inode table*/
146 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
147 if(yaffsfs_inode[i].iObj == obj)
154 * yaffsfs_GetInodeIdForObject
155 * Grab an inode entry when opening a new inode.
157 static int yaffsfs_GetInodeIdForObject(struct yaffs_obj *obj)
161 yaffsfs_Inode *in = NULL;
164 obj = yaffs_get_equivalent_obj(obj);
166 ret = yaffsfs_FindInodeIdForObject(obj);
168 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
169 if(!yaffsfs_inode[i].iObj)
174 in = &yaffsfs_inode[ret];
186 static int yaffsfs_CountHandles(struct yaffs_obj *obj)
188 int i = yaffsfs_FindInodeIdForObject(obj);
191 return yaffsfs_inode[i].count;
196 static void yaffsfs_ReleaseInode(yaffsfs_Inode *in)
198 struct yaffs_obj *obj;
205 obj->my_inode = NULL;
210 static void yaffsfs_PutInode(int inodeId)
212 if(inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES){
213 yaffsfs_Inode *in = & yaffsfs_inode[inodeId];
216 yaffsfs_ReleaseInode(in);
225 * Grab a handle (when opening a file)
228 static int yaffsfs_GetNewHandle(void)
233 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
234 h = yaffsfs_GetHandlePointer(i);
236 /* todo bug: should never happen */
239 memset(h,0,sizeof(yaffsfs_Handle));
250 * Increase use of handle when reading/writing a file
252 static int yaffsfs_GetHandle(int handle)
254 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
256 if(h && h->useCount > 0){
264 * Let go of a handle when closing a file or aborting an open or
265 * ending a read or write.
267 static int yaffsfs_PutHandle(int handle)
269 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
271 if(h && h->useCount > 0){
275 yaffsfs_PutInode(h->inodeId);
283 static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
286 struct yaffs_obj *obj;
288 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
289 h = yaffsfs_GetHandlePointer(i);
290 obj = yaffsfs_GetHandleObject(i);
291 if(h && h->useCount>0 && obj && obj->my_dev == dev){
293 yaffsfs_PutInode(h->inodeId);
303 * Stuff to handle names.
307 int yaffsfs_Match(YCHAR a, YCHAR b)
313 int yaffsfs_IsPathDivider(YCHAR ch)
315 const YCHAR *str = YAFFS_PATH_DIVIDERS;
326 int yaffsfs_CheckNameLength(const char *name)
330 int nameLength = yaffs_strnlen(name,YAFFS_MAX_NAME_LENGTH+1);
333 yaffsfs_SetError(-ENOENT);
335 } else if (nameLength > YAFFS_MAX_NAME_LENGTH){
336 yaffsfs_SetError(-ENAMETOOLONG);
344 static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
346 YCHAR *alt_path = NULL;
351 * We don't have a definition for max path length.
352 * We will use 3 * max name length instead.
355 path_length = strnlen(path,(YAFFS_MAX_NAME_LENGTH+1)*3 +1);
357 /* If the last character is a path divider, then we need to
358 * trim it back so that the name look-up works properly.
359 * eg. /foo/new_dir/ -> /foo/newdir
360 * Curveball: Need to handle multiple path dividers:
361 * eg. /foof/sdfse///// -> /foo/sdfse
363 if(path_length > 0 &&
364 yaffsfs_IsPathDivider(path[path_length-1])){
365 alt_path = YMALLOC(path_length + 1);
368 strcpy(alt_path, path);
369 for(i = path_length-1;
370 i >= 0 && yaffsfs_IsPathDivider(alt_path[i]);
372 alt_path[i] = (YCHAR) 0;
374 *ret_path = alt_path;
379 LIST_HEAD(yaffsfs_deviceList);
384 * Scan the configuration list to find the device
385 * Curveballs: Should match paths that end in '/' too
386 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
388 static struct yaffs_dev *yaffsfs_FindDevice(const YCHAR *path, YCHAR **restOfPath)
390 struct list_head *cfg;
391 const YCHAR *leftOver;
393 struct yaffs_dev *retval = NULL;
394 struct yaffs_dev *dev = NULL;
396 int longestMatch = -1;
400 * Check all configs, choose the one that:
401 * 1) Actually matches a prefix (ie /a amd /abc will not match
402 * 2) Matches the longest.
404 list_for_each(cfg, &yaffsfs_deviceList){
405 dev = list_entry(cfg, struct yaffs_dev, dev_list);
412 while(matching && *p && *leftOver){
413 /* Skip over any /s */
414 while(yaffsfs_IsPathDivider(*p))
417 /* Skip over any /s */
418 while(yaffsfs_IsPathDivider(*leftOver))
421 /* Now match the text part */
423 *p && !yaffsfs_IsPathDivider(*p) &&
424 *leftOver && !yaffsfs_IsPathDivider(*leftOver)){
425 if(yaffsfs_Match(*p,*leftOver)){
435 /* Skip over any /s in leftOver */
436 while(yaffsfs_IsPathDivider(*leftOver))
439 // Skip over any /s in p
440 while(yaffsfs_IsPathDivider(*p))
443 // p should now be at the end of the string (ie. fully matched)
447 if( matching && (thisMatchLength > longestMatch))
450 *restOfPath = (YCHAR *)leftOver;
452 longestMatch = thisMatchLength;
459 static int yaffsfs_CheckPath(const YCHAR *path)
463 while(*path && n < YAFFS_MAX_NAME_LENGTH && divs < 100){
464 if(yaffsfs_IsPathDivider(*path)){
472 return (*path) ? -1 : 0;
475 /* FindMountPoint only returns a dev entry if the path is a mount point */
476 static struct yaffs_dev *yaffsfs_FindMountPoint(const YCHAR *path)
478 struct yaffs_dev *dev;
479 YCHAR *restOfPath=NULL;
480 dev = yaffsfs_FindDevice(path,&restOfPath);
481 if(dev && restOfPath && *restOfPath)
486 static struct yaffs_obj *yaffsfs_FindRoot(const YCHAR *path, YCHAR **restOfPath)
489 struct yaffs_dev *dev;
491 dev= yaffsfs_FindDevice(path,restOfPath);
492 if(dev && dev->is_mounted){
493 return dev->root_dir;
498 static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
499 int symDepth, int *loop)
503 obj = yaffs_get_equivalent_obj(obj);
505 while(obj && obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK){
506 YCHAR *alias = obj->variant.symlink_variant.alias;
508 if(yaffsfs_IsPathDivider(*alias))
509 /* Starts with a /, need to scan from root up */
510 obj = yaffsfs_FindObject(NULL,alias,symDepth++,
513 /* Relative to here, so use the parent of the symlink as a start */
514 obj = yaffsfs_FindObject(obj->parent,alias,symDepth++,
522 * yaffsfs_FindDirectory
523 * Parse a path to determine the directory and the name within the directory.
525 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
527 static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
528 const YCHAR *path, YCHAR **name, int symDepth,
529 int *notDir,int *loop)
531 struct yaffs_obj *dir;
533 YCHAR str[YAFFS_MAX_NAME_LENGTH+1];
536 if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES){
544 restOfPath = (YCHAR *)path;
547 dir = yaffsfs_FindRoot(path,&restOfPath);
553 * curve ball: also throw away surplus '/'
554 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
556 while(yaffsfs_IsPathDivider(*restOfPath))
557 restOfPath++; /* get rid of '/' */
562 while(*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)){
563 if (i < YAFFS_MAX_NAME_LENGTH){
564 str[i] = *restOfPath;
572 /* got to the end of the string */
575 if(yaffs_strcmp(str,_Y(".")) == 0)
579 else if(yaffs_strcmp(str,_Y("..")) == 0)
582 dir = yaffs_find_by_name(dir,str);
584 dir = yaffsfs_FollowLink(dir,symDepth,loop);
586 if(dir && dir->variant_type !=
587 YAFFS_OBJECT_TYPE_DIRECTORY){
596 /* directory did not exist. */
600 static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
607 return yaffsfs_DoFindDirectory(relDir,path,name,symDepth,notDir,loop);
611 * yaffsfs_FindObject turns a path for an existing object into the object
613 static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
614 const YCHAR *path,int symDepth, int getEquiv,
615 struct yaffs_obj **dirOut, int *notDir,int *loop)
617 struct yaffs_obj *dir;
618 struct yaffs_obj *obj;
621 dir = yaffsfs_FindDirectory(relDir,path,&name,symDepth,notDir,loop);
627 obj = yaffs_find_by_name(dir,name);
632 obj = yaffs_get_equivalent_obj(obj);
638 /*************************************************************************
639 * Start of yaffsfs visible functions.
640 *************************************************************************/
642 int yaffs_dup(int fd)
645 yaffsfs_Handle *oldPtr = NULL;
646 yaffsfs_Handle *newPtr = NULL;
650 oldPtr = yaffsfs_GetHandlePointer(fd);
651 if(oldPtr && oldPtr->useCount > 0)
652 newHandle = yaffsfs_GetNewHandle();
654 newPtr = yaffsfs_GetHandlePointer(newHandle);
662 yaffsfs_SetError(-EBADF);
664 yaffsfs_SetError(-ENOMEM);
672 int yaffs_open_sharing(const YCHAR *path, int oflag, int mode, int sharing)
674 struct yaffs_obj *obj = NULL;
675 struct yaffs_obj *dir = NULL;
678 yaffsfs_Handle *yh = NULL;
681 int errorReported = 0;
682 int rwflags = oflag & ( O_RDWR | O_RDONLY | O_WRONLY);
683 u8 shareRead = (sharing & YAFFS_SHARE_READ) ? 1 : 0;
684 u8 shareWrite = (sharing & YAFFS_SHARE_WRITE) ? 1 : 0;
685 u8 sharedReadAllowed;
686 u8 sharedWriteAllowed;
695 yaffsfs_SetError(-EFAULT);
699 if(yaffsfs_CheckPath(path) < 0){
700 yaffsfs_SetError(-ENAMETOOLONG);
704 /* O_EXCL only has meaning if O_CREAT is specified */
705 if(!(oflag & O_CREAT))
708 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
709 if( (oflag & O_CREAT) & (oflag & O_EXCL))
712 /* Todo: Are there any more flag combos to sanitise ? */
714 /* Figure out if reading or writing is requested */
716 readRequested = (rwflags == O_RDWR || rwflags == O_RDONLY) ? 1 : 0;
717 writeRequested = (rwflags == O_RDWR || rwflags == O_WRONLY) ? 1 : 0;
721 handle = yaffsfs_GetNewHandle();
724 yaffsfs_SetError(-ENFILE);
728 yh = yaffsfs_GetHandlePointer(handle);
730 /* try to find the exisiting object */
731 obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
733 obj = yaffsfs_FollowLink(obj,symDepth++,&loop);
736 obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
737 obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
743 /* The file already exists or it might be a directory */
745 /* If it is a directory then we can't open it as a file */
746 if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
748 yaffsfs_SetError(-EISDIR);
752 /* Open should fail if O_CREAT and O_EXCL are specified since
755 if(!errorReported && (oflag & O_EXCL) && (oflag & O_CREAT)){
757 yaffsfs_SetError(-EEXIST);
761 /* Check file permissions */
762 if( readRequested && !(obj->yst_mode & S_IREAD))
765 if( writeRequested && !(obj->yst_mode & S_IWRITE))
768 if( !errorReported && writeRequested &&
769 obj->my_dev->read_only){
771 yaffsfs_SetError(-EROFS);
775 if(openDenied && !errorReported ) {
776 /* Error if the file exists but permissions are refused. */
777 yaffsfs_SetError(-EACCES);
781 /* Check sharing of an existing object. */
785 sharedReadAllowed = 1;
786 sharedWriteAllowed = 1;
789 for( i = 0; i < YAFFSFS_N_HANDLES; i++){
790 hx = &yaffsfs_handle[i];
791 if(hx->useCount > 0 &&
793 yaffsfs_inode[hx->inodeId].iObj == obj){
795 sharedReadAllowed = 0;
797 sharedWriteAllowed = 0;
807 if((!sharedReadAllowed && readRequested)||
808 (!shareRead && alreadyReading) ||
809 (!sharedWriteAllowed && writeRequested) ||
810 (!shareWrite && alreadyWriting)){
812 yaffsfs_SetError(-EBUSY);
819 /* If we could not open an existing object, then let's see if
820 * the directory exists. If not, error.
822 if(!obj && !errorReported){
823 dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
825 yaffsfs_SetError(-ENOTDIR);
828 yaffsfs_SetError(-ELOOP);
831 yaffsfs_SetError(-ENOENT);
836 if(!obj && dir && !errorReported && (oflag & O_CREAT)) {
837 /* Let's see if we can create this file if it does not exist. */
838 if(dir->my_dev->read_only){
839 yaffsfs_SetError(-EROFS);
842 obj = yaffs_create_file(dir,name,mode,0,0);
844 if(!obj && !errorReported){
845 yaffsfs_SetError(-ENOSPC);
850 if(!obj && dir && !errorReported && !(oflag & O_CREAT)) {
851 /* Error if the file does not exist and CREAT is not set. */
852 yaffsfs_SetError(-ENOENT);
856 if(obj && !openDenied) {
857 int inodeId = yaffsfs_GetInodeIdForObject(obj);
861 * Todo: Fix any problem if inodes run out, though that
862 * can't happen if the number of inode items >= number of handles.
866 yh->inodeId = inodeId;
867 yh->reading = readRequested;
868 yh->writing = writeRequested;
869 yh->append = (oflag & O_APPEND) ? 1 : 0;
871 yh->shareRead = shareRead;
872 yh->shareWrite = shareWrite;
874 /* Hook inode to object */
875 obj->my_inode = (void*) &yaffsfs_inode[inodeId];
877 if((oflag & O_TRUNC) && yh->writing)
878 yaffs_resize_file(obj,0);
880 yaffsfs_PutHandle(handle);
882 yaffsfs_SetError(0); /* Problem */
892 int yaffs_open(const YCHAR *path, int oflag, int mode)
894 return yaffs_open_sharing(path, oflag, mode, YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
897 int yaffs_Dofsync(int fd,int datasync)
899 yaffsfs_Handle *h = NULL;
904 h = yaffsfs_GetHandlePointer(fd);
906 if(!h || h->useCount < 1)
907 yaffsfs_SetError(-EBADF);
909 struct yaffs_obj * obj;
910 obj = yaffsfs_inode[h->inodeId].iObj;
911 if(obj->my_dev->read_only)
912 yaffsfs_SetError(-EROFS);
914 yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,datasync);
924 int yaffs_fsync(int fd)
926 return yaffs_Dofsync(fd,0);
929 int yaffs_flush(int fd)
931 return yaffs_fsync(fd);
934 int yaffs_fdatasync(int fd)
936 return yaffs_Dofsync(fd,1);
939 int yaffs_close(int fd)
941 yaffsfs_Handle *h = NULL;
946 h = yaffsfs_GetHandlePointer(fd);
948 if(h && h->useCount > 0) {
950 yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,0);
951 yaffsfs_PutHandle(fd);
955 yaffsfs_SetError(-EBADF);
966 int yaffsfs_do_read(int fd, void *vbuf, unsigned int nbyte, int isPread, int offset)
968 yaffsfs_Handle *h = NULL;
969 struct yaffs_obj *obj = NULL;
976 unsigned int maxRead;
977 u8 *buf = (u8 *)vbuf;
980 yaffsfs_SetError(-EFAULT);
985 h = yaffsfs_GetHandlePointer(fd);
986 obj = yaffsfs_GetHandleObject(fd);
990 yaffsfs_SetError(-EBADF);
992 } else if(!h->reading){
993 /* Not a reading handle */
994 yaffsfs_SetError(-EINVAL);
996 } else if(nbyte > YAFFS_MAX_FILE_SIZE){
997 yaffsfs_SetError(-EINVAL);
1003 startPos = h->position;
1007 if(yaffs_get_obj_length(obj) > pos)
1008 maxRead = yaffs_get_obj_length(obj) - pos;
1016 yaffsfs_GetHandle(fd);
1018 endPos = pos + nbyte;
1020 if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1021 nbyte > YAFFS_MAX_FILE_SIZE ||
1022 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
1028 nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
1033 * Need to reverify object in case the device was
1034 * unmounted in another thread.
1036 obj = yaffsfs_GetHandleObject(fd);
1040 nRead = yaffs_file_rd(obj,buf,pos,nToRead);
1048 if(nRead == nToRead)
1051 nbyte = 0; /* no more to read */
1061 yaffsfs_PutHandle(fd);
1065 h->position = startPos + totalRead;
1067 yaffsfs_SetError(-EINVAL);
1074 return (totalRead >= 0) ? totalRead : -1;
1078 int yaffs_read(int fd, void *buf, unsigned int nbyte)
1080 return yaffsfs_do_read(fd, buf, nbyte, 0, 0);
1083 int yaffs_pread(int fd, void *buf, unsigned int nbyte, unsigned int offset)
1085 return yaffsfs_do_read(fd, buf, nbyte, 1, offset);
1088 int yaffsfs_do_write(int fd, const void *vbuf, unsigned int nbyte, int isPwrite, int offset)
1090 yaffsfs_Handle *h = NULL;
1091 struct yaffs_obj *obj = NULL;
1096 int totalWritten = 0;
1097 int write_trhrough = 0;
1099 const u8 *buf = (const u8 *)vbuf;
1102 yaffsfs_SetError(-EFAULT);
1107 h = yaffsfs_GetHandlePointer(fd);
1108 obj = yaffsfs_GetHandleObject(fd);
1112 yaffsfs_SetError(-EBADF);
1114 } else if(!h->writing){
1115 yaffsfs_SetError(-EINVAL);
1117 } else if(obj->my_dev->read_only){
1118 yaffsfs_SetError(-EROFS);
1122 startPos = yaffs_get_obj_length(obj);
1126 startPos = h->position;
1128 yaffsfs_GetHandle(fd);
1130 endPos = pos + nbyte;
1132 if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
1133 nbyte > YAFFS_MAX_FILE_SIZE ||
1134 endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
1141 nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
1142 if(nToWrite > nbyte)
1146 * Need to reverify object in case the device was
1147 * remounted or unmounted in another thread.
1149 obj = yaffsfs_GetHandleObject(fd);
1150 if(!obj || obj->my_dev->read_only)
1153 nWritten = yaffs_wr_file(obj,buf,pos,nToWrite,
1156 totalWritten += nWritten;
1161 if(nWritten == nToWrite)
1166 if(nWritten < 1 && totalWritten < 1){
1167 yaffsfs_SetError(-ENOSPC);
1177 yaffsfs_PutHandle(fd);
1180 if(totalWritten > 0)
1181 h->position = startPos + totalWritten;
1183 yaffsfs_SetError(-EINVAL);
1189 return (totalWritten >= 0) ? totalWritten : -1;
1192 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
1194 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
1197 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, unsigned int offset)
1199 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
1203 int yaffs_truncate(const YCHAR *path,off_t new_size)
1205 struct yaffs_obj *obj = NULL;
1206 struct yaffs_obj *dir = NULL;
1207 int result = YAFFS_FAIL;
1212 yaffsfs_SetError(-EFAULT);
1216 if(yaffsfs_CheckPath(path) < 0){
1217 yaffsfs_SetError(-ENAMETOOLONG);
1223 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1224 obj = yaffsfs_FollowLink(obj,0,&loop);
1227 yaffsfs_SetError(-ENOTDIR);
1229 yaffsfs_SetError(-ELOOP);
1230 else if(!dir || !obj)
1231 yaffsfs_SetError(-ENOENT);
1232 else if(obj->my_dev->read_only)
1233 yaffsfs_SetError(-EROFS);
1234 else if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
1235 yaffsfs_SetError(-EISDIR);
1236 else if(obj->my_dev->read_only)
1237 yaffsfs_SetError(-EROFS);
1238 else if(new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1239 yaffsfs_SetError(-EINVAL);
1241 result = yaffs_resize_file(obj,new_size);
1245 return (result) ? 0 : -1;
1248 int yaffs_ftruncate(int fd, off_t new_size)
1250 yaffsfs_Handle *h = NULL;
1251 struct yaffs_obj *obj = NULL;
1255 h = yaffsfs_GetHandlePointer(fd);
1256 obj = yaffsfs_GetHandleObject(fd);
1260 yaffsfs_SetError(-EBADF);
1261 else if(!h->writing)
1262 yaffsfs_SetError(-EINVAL);
1263 else if(obj->my_dev->read_only)
1264 yaffsfs_SetError(-EROFS);
1265 else if( new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
1266 yaffsfs_SetError(-EINVAL);
1268 /* resize the file */
1269 result = yaffs_resize_file(obj,new_size);
1272 return (result) ? 0 : -1;
1276 off_t yaffs_lseek(int fd, off_t offset, int whence)
1278 yaffsfs_Handle *h = NULL;
1279 struct yaffs_obj *obj = NULL;
1284 h = yaffsfs_GetHandlePointer(fd);
1285 obj = yaffsfs_GetHandleObject(fd);
1288 yaffsfs_SetError(-EBADF);
1289 else if(offset > YAFFS_MAX_FILE_SIZE)
1290 yaffsfs_SetError(-EINVAL);
1292 if(whence == SEEK_SET){
1295 } else if(whence == SEEK_CUR) {
1296 if( (h->position + offset) >= 0)
1297 pos = (h->position + offset);
1298 } else if(whence == SEEK_END) {
1299 fSize = yaffs_get_obj_length(obj);
1300 if(fSize >= 0 && (fSize + offset) >= 0)
1301 pos = fSize + offset;
1304 if(pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
1307 yaffsfs_SetError(-EINVAL);
1318 int yaffsfs_DoUnlink(const YCHAR *path,int isDirectory)
1320 struct yaffs_obj *dir = NULL;
1321 struct yaffs_obj *obj = NULL;
1323 int result = YAFFS_FAIL;
1328 yaffsfs_SetError(-EFAULT);
1332 if(yaffsfs_CheckPath(path) < 0){
1333 yaffsfs_SetError(-ENAMETOOLONG);
1339 obj = yaffsfs_FindObject(NULL,path,0,0,NULL,NULL,NULL);
1340 dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
1343 yaffsfs_SetError(-ENOTDIR);
1345 yaffsfs_SetError(-ELOOP);
1347 yaffsfs_SetError(-ENOENT);
1348 else if(yaffs_strncmp(name,_Y("."),2) == 0)
1349 yaffsfs_SetError(-EINVAL);
1351 yaffsfs_SetError(-ENOENT);
1352 else if(obj->my_dev->read_only)
1353 yaffsfs_SetError(-EROFS);
1354 else if(!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1355 yaffsfs_SetError(-EISDIR);
1356 else if(isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
1357 yaffsfs_SetError(-ENOTDIR);
1358 else if(isDirectory && obj == obj->my_dev->root_dir)
1359 yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
1361 result = yaffs_unlinker(dir,name);
1363 if(result == YAFFS_FAIL && isDirectory)
1364 yaffsfs_SetError(-ENOTEMPTY);
1369 return (result == YAFFS_FAIL) ? -1 : 0;
1373 int yaffs_unlink(const YCHAR *path)
1375 return yaffsfs_DoUnlink(path,0);
1378 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1380 struct yaffs_obj *olddir = NULL;
1381 struct yaffs_obj *newdir = NULL;
1382 struct yaffs_obj *obj = NULL;
1383 struct yaffs_obj *newobj = NULL;
1386 int result= YAFFS_FAIL;
1387 int rename_allowed = 1;
1393 YCHAR *alt_newpath=NULL;
1395 if(!oldPath || !newPath){
1396 yaffsfs_SetError(-EFAULT);
1400 if(yaffsfs_CheckPath(newPath) < 0){
1401 yaffsfs_SetError(-ENAMETOOLONG);
1405 if(yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0){
1406 yaffsfs_SetError(-ENOMEM);
1410 newPath = alt_newpath;
1415 olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0,¬OldDir,&oldLoop);
1416 newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0,¬NewDir,&newLoop);
1417 obj = yaffsfs_FindObject(NULL,oldPath,0,0,NULL,NULL,NULL);
1418 newobj = yaffsfs_FindObject(NULL,newPath,0,0,NULL,NULL,NULL);
1420 /* If the object being renamed is a directory and the
1421 * path ended with a "/" then the olddir == obj.
1422 * We pass through NULL for the old name to tell the lower layers
1423 * to use olddir as the object.
1429 if((!olddir && notOldDir) || (!newdir && notNewDir)) {
1430 yaffsfs_SetError(-ENOTDIR);
1432 } else if(oldLoop || newLoop) {
1433 yaffsfs_SetError(-ELOOP);
1435 } else if (olddir && oldname && yaffs_strncmp(oldname, _Y("."),2) == 0){
1436 yaffsfs_SetError(-EINVAL);
1438 }else if(!olddir || !newdir || !obj) {
1439 yaffsfs_SetError(-ENOENT);
1441 } else if(obj->my_dev->read_only){
1442 yaffsfs_SetError(-EROFS);
1444 } else if(yaffs_is_non_empty_dir(newobj)){
1445 yaffsfs_SetError(-ENOTEMPTY);
1447 } else if(olddir->my_dev != newdir->my_dev) {
1448 /* Rename must be on same device */
1449 yaffsfs_SetError(-EXDEV);
1451 } else if(obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY) {
1453 * It is a directory, check that it is not being renamed to
1454 * being its own decendent.
1455 * Do this by tracing from the new directory back to the root,
1459 struct yaffs_obj *xx = newdir;
1461 while( rename_allowed && xx){
1467 yaffsfs_SetError(-EINVAL);
1471 result = yaffs_rename_obj(olddir,oldname,newdir,newname);
1478 return (result == YAFFS_FAIL) ? -1 : 0;
1482 static int yaffsfs_DoStat(struct yaffs_obj *obj,struct yaffs_stat *buf)
1486 obj = yaffs_get_equivalent_obj(obj);
1489 buf->st_dev = (int)obj->my_dev->os_context;
1490 buf->st_ino = obj->obj_id;
1491 buf->st_mode = obj->yst_mode & ~S_IFMT; /* clear out file type bits */
1493 if(obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
1494 buf->st_mode |= S_IFDIR;
1495 else if(obj->variant_type == YAFFS_OBJECT_TYPE_SYMLINK)
1496 buf->st_mode |= S_IFLNK;
1497 else if(obj->variant_type == YAFFS_OBJECT_TYPE_FILE)
1498 buf->st_mode |= S_IFREG;
1500 buf->st_nlink = yaffs_get_obj_link_count(obj);
1503 buf->st_rdev = obj->yst_rdev;
1504 buf->st_size = yaffs_get_obj_length(obj);
1505 buf->st_blksize = obj->my_dev->data_bytes_per_chunk;
1506 buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
1507 #if CONFIG_YAFFS_WINCE
1508 buf->yst_wince_atime[0] = obj->win_atime[0];
1509 buf->yst_wince_atime[1] = obj->win_atime[1];
1510 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1511 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1512 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1513 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1515 buf->yst_atime = obj->yst_atime;
1516 buf->yst_ctime = obj->yst_ctime;
1517 buf->yst_mtime = obj->yst_mtime;
1524 static int yaffsfs_DoStatOrLStat(const YCHAR *path, struct yaffs_stat *buf,int doLStat)
1526 struct yaffs_obj *obj=NULL;
1527 struct yaffs_obj *dir=NULL;
1533 yaffsfs_SetError(-EFAULT);
1537 if(yaffsfs_CheckPath(path) < 0){
1538 yaffsfs_SetError(-ENAMETOOLONG);
1544 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1547 obj = yaffsfs_FollowLink(obj,0,&loop);
1550 yaffsfs_SetError(-ENOTDIR);
1552 yaffsfs_SetError(-ELOOP);
1553 else if(!dir || !obj)
1554 yaffsfs_SetError(-ENOENT);
1556 retVal = yaffsfs_DoStat(obj,buf);
1564 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1566 return yaffsfs_DoStatOrLStat(path,buf,0);
1569 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1571 return yaffsfs_DoStatOrLStat(path,buf,1);
1574 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1576 struct yaffs_obj *obj;
1581 yaffsfs_SetError(-EFAULT);
1586 obj = yaffsfs_GetHandleObject(fd);
1589 retVal = yaffsfs_DoStat(obj,buf);
1592 yaffsfs_SetError(-EBADF);
1599 #ifndef CONFIG_YAFFS_WINCE
1600 /* xattrib functions */
1603 static int yaffs_do_setxattr(const YCHAR *path, const char *name,
1604 const void *data, int size, int flags, int follow)
1606 struct yaffs_obj *obj;
1607 struct yaffs_obj *dir;
1613 if(!path || !name || !data){
1614 yaffsfs_SetError(-EFAULT);
1618 if(yaffsfs_CheckPath(path) < 0){
1619 yaffsfs_SetError(-ENAMETOOLONG);
1625 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1628 obj = yaffsfs_FollowLink(obj,0,&loop);
1631 yaffsfs_SetError(-ENOTDIR);
1633 yaffsfs_SetError(-ELOOP);
1634 else if(!dir || !obj)
1635 yaffsfs_SetError(-ENOENT);
1637 retVal = yaffs_set_xattrib(obj,name,data,size,flags);
1639 yaffsfs_SetError(retVal);
1650 int yaffs_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1652 return yaffs_do_setxattr(path, name, data, size, flags, 1);
1655 int yaffs_lsetxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1657 return yaffs_do_setxattr(path, name, data, size, flags, 0);
1662 int yaffs_fsetxattr(int fd, const char *name, const void *data, int size, int flags)
1664 struct yaffs_obj *obj;
1669 yaffsfs_SetError(-EFAULT);
1674 obj = yaffsfs_GetHandleObject(fd);
1677 yaffsfs_SetError(-EBADF);
1679 retVal = yaffs_set_xattrib(obj,name,data,size,flags);
1681 yaffsfs_SetError(retVal);
1691 static int yaffs_do_getxattr(const YCHAR *path, const char *name, void *data, int size, int follow)
1693 struct yaffs_obj *obj;
1694 struct yaffs_obj *dir;
1699 if(!path || !name || !data ){
1700 yaffsfs_SetError(-EFAULT);
1704 if(yaffsfs_CheckPath(path) < 0){
1705 yaffsfs_SetError(-ENAMETOOLONG);
1711 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1714 obj = yaffsfs_FollowLink(obj,0,&loop);
1717 yaffsfs_SetError(-ENOTDIR);
1719 yaffsfs_SetError(-ELOOP);
1720 else if(!dir || !obj)
1721 yaffsfs_SetError(-ENOENT);
1723 retVal = yaffs_get_xattrib(obj,name,data,size);
1725 yaffsfs_SetError(retVal);
1735 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
1737 return yaffs_do_getxattr( path, name, data, size, 1);
1739 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
1741 return yaffs_do_getxattr( path, name, data, size, 0);
1746 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
1748 struct yaffs_obj *obj;
1752 if(!name || !data ){
1753 yaffsfs_SetError(-EFAULT);
1758 obj = yaffsfs_GetHandleObject(fd);
1761 retVal = yaffs_get_xattrib(obj,name,data,size);
1763 yaffsfs_SetError(retVal);
1768 yaffsfs_SetError(-EBADF);
1775 static int yaffs_do_listxattr(const YCHAR *path, char *data, int size, int follow)
1777 struct yaffs_obj *obj=NULL;
1778 struct yaffs_obj *dir=NULL;
1783 if(!path || !data ){
1784 yaffsfs_SetError(-EFAULT);
1788 if(yaffsfs_CheckPath(path) < 0){
1789 yaffsfs_SetError(-ENAMETOOLONG);
1795 obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
1798 obj = yaffsfs_FollowLink(obj,0,&loop);
1801 yaffsfs_SetError(-ENOTDIR);
1803 yaffsfs_SetError(-ELOOP);
1804 else if(!dir || !obj)
1805 yaffsfs_SetError(-ENOENT);
1807 retVal = yaffs_list_xattrib(obj, data,size);
1809 yaffsfs_SetError(retVal);
1820 int yaffs_listxattr(const YCHAR *path, char *data, int size)
1822 return yaffs_do_listxattr(path, data, size, 1);
1825 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
1827 return yaffs_do_listxattr(path, data, size, 0);
1830 int yaffs_flistxattr(int fd, char *data, int size)
1832 struct yaffs_obj *obj;
1837 yaffsfs_SetError(-EFAULT);
1842 obj = yaffsfs_GetHandleObject(fd);
1845 retVal = yaffs_list_xattrib(obj,data,size);
1847 yaffsfs_SetError(retVal);
1852 yaffsfs_SetError(-EBADF);
1859 static int yaffs_do_removexattr(const YCHAR *path, const char *name, int follow)
1861 struct yaffs_obj *obj=NULL;
1862 struct yaffs_obj *dir=NULL;
1868 yaffsfs_SetError(-EFAULT);
1872 if(yaffsfs_CheckPath(path) < 0){
1873 yaffsfs_SetError(-ENAMETOOLONG);
1879 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
1882 obj = yaffsfs_FollowLink(obj,0,&loop);
1885 yaffsfs_SetError(-ENOTDIR);
1887 yaffsfs_SetError(-ELOOP);
1888 else if(!dir || !obj)
1889 yaffsfs_SetError(-ENOENT);
1891 retVal = yaffs_remove_xattrib(obj,name);
1893 yaffsfs_SetError(retVal);
1904 int yaffs_removexattr(const YCHAR *path, const char *name)
1906 return yaffs_do_removexattr(path, name, 1);
1909 int yaffs_lremovexattr(const YCHAR *path, const char *name)
1911 return yaffs_do_removexattr(path, name, 0);
1914 int yaffs_fremovexattr(int fd, const char *name)
1916 struct yaffs_obj *obj;
1921 yaffsfs_SetError(-EFAULT);
1926 obj = yaffsfs_GetHandleObject(fd);
1929 retVal = yaffs_remove_xattrib(obj,name);
1931 yaffsfs_SetError(retVal);
1936 yaffsfs_SetError(-EBADF);
1944 #ifdef CONFIG_YAFFS_WINCE
1945 int yaffs_get_wince_times(int fd, unsigned *wctime, unsigned *watime, unsigned *wmtime)
1947 struct yaffs_obj *obj;
1952 obj = yaffsfs_GetHandleObject(fd);
1957 wctime[0] = obj->win_ctime[0];
1958 wctime[1] = obj->win_ctime[1];
1961 watime[0] = obj->win_atime[0];
1962 watime[1] = obj->win_atime[1];
1965 wmtime[0] = obj->win_mtime[0];
1966 wmtime[1] = obj->win_mtime[1];
1973 yaffsfs_SetError(-EBADF);
1981 int yaffs_set_wince_times(int fd,
1982 const unsigned *wctime,
1983 const unsigned *watime,
1984 const unsigned *wmtime)
1986 struct yaffs_obj *obj;
1991 obj = yaffsfs_GetHandleObject(fd);
1996 obj->win_ctime[0] = wctime[0];
1997 obj->win_ctime[1] = wctime[1];
2000 obj->win_atime[0] = watime[0];
2001 obj->win_atime[1] = watime[1];
2004 obj->win_mtime[0] = wmtime[0];
2005 obj->win_mtime[1] = wmtime[1];
2009 result = yaffs_flush_file(obj,0,0);
2013 yaffsfs_SetError(-EBADF);
2023 static int yaffsfs_DoChMod(struct yaffs_obj *obj,mode_t mode)
2028 obj = yaffs_get_equivalent_obj(obj);
2031 obj->yst_mode = mode;
2033 result = yaffs_flush_file(obj,0,0);
2036 return result == YAFFS_OK ? 0 : -1;
2040 int yaffs_access(const YCHAR *path, int amode)
2042 struct yaffs_obj *obj=NULL;
2043 struct yaffs_obj *dir=NULL;
2049 yaffsfs_SetError(-EFAULT);
2053 if(yaffsfs_CheckPath(path) < 0){
2054 yaffsfs_SetError(-ENAMETOOLONG);
2058 if(amode & ~(R_OK | W_OK | X_OK)){
2059 yaffsfs_SetError(-EINVAL);
2065 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
2066 obj = yaffsfs_FollowLink(obj,0,&loop);
2069 yaffsfs_SetError(-ENOTDIR);
2071 yaffsfs_SetError(-ELOOP);
2072 else if(!dir || !obj)
2073 yaffsfs_SetError(-ENOENT);
2074 else if((amode & W_OK) && obj->my_dev->read_only)
2075 yaffsfs_SetError(-EROFS);
2079 if((amode & R_OK) && !(obj->yst_mode & S_IREAD))
2081 if((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
2083 if((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
2087 yaffsfs_SetError(-EACCES);
2099 int yaffs_chmod(const YCHAR *path, mode_t mode)
2101 struct yaffs_obj *obj=NULL;
2102 struct yaffs_obj *dir=NULL;
2108 yaffsfs_SetError(-EFAULT);
2112 if(yaffsfs_CheckPath(path) < 0){
2113 yaffsfs_SetError(-ENAMETOOLONG);
2118 yaffsfs_SetError(-EINVAL);
2124 obj = yaffsfs_FindObject(NULL,path,0,1, &dir, ¬Dir,&loop);
2125 obj = yaffsfs_FollowLink(obj,0,&loop);
2128 yaffsfs_SetError(-ENOTDIR);
2130 yaffsfs_SetError(-ELOOP);
2131 else if(!dir || !obj)
2132 yaffsfs_SetError(-ENOENT);
2133 else if(obj->my_dev->read_only)
2134 yaffsfs_SetError(-EROFS);
2136 retVal = yaffsfs_DoChMod(obj,mode);
2145 int yaffs_fchmod(int fd, mode_t mode)
2147 struct yaffs_obj *obj;
2151 yaffsfs_SetError(-EINVAL);
2156 obj = yaffsfs_GetHandleObject(fd);
2159 yaffsfs_SetError(-EBADF);
2160 else if(obj->my_dev->read_only)
2161 yaffsfs_SetError(-EROFS);
2163 retVal = yaffsfs_DoChMod(obj,mode);
2170 int yaffs_mkdir(const YCHAR *path, mode_t mode)
2172 struct yaffs_obj *parent = NULL;
2173 struct yaffs_obj *dir = NULL;
2175 YCHAR *alt_path = NULL;
2181 yaffsfs_SetError(-EFAULT);
2185 if(yaffsfs_CheckPath(path) < 0){
2186 yaffsfs_SetError(-ENAMETOOLONG);
2190 if(yaffsfs_alt_dir_path(path, &alt_path) < 0){
2191 yaffsfs_SetError(-ENOMEM);
2198 parent = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
2199 if(!parent && notDir)
2200 yaffsfs_SetError(-ENOTDIR);
2202 yaffsfs_SetError(-ELOOP);
2204 yaffsfs_SetError(-ENOENT);
2205 else if(yaffs_strnlen(name,5) == 0){
2206 /* Trying to make the root itself */
2207 yaffsfs_SetError(-EEXIST);
2208 } else if(parent->my_dev->read_only)
2209 yaffsfs_SetError(-EROFS);
2211 dir = yaffs_create_dir(parent,name,mode,0,0);
2214 else if (yaffs_find_by_name(parent,name))
2215 yaffsfs_SetError(-EEXIST); /* the name already exists */
2217 yaffsfs_SetError(-ENOSPC); /* just assume no space */
2228 int yaffs_rmdir(const YCHAR *path)
2234 yaffsfs_SetError(-EFAULT);
2238 if(yaffsfs_CheckPath(path) < 0){
2239 yaffsfs_SetError(-ENAMETOOLONG);
2243 if(yaffsfs_alt_dir_path(path, &alt_path) < 0){
2244 yaffsfs_SetError(-ENOMEM);
2249 result = yaffsfs_DoUnlink(path,1);
2256 void * yaffs_getdev(const YCHAR *path)
2258 struct yaffs_dev *dev=NULL;
2260 dev = yaffsfs_FindDevice(path,&dummy);
2264 int yaffs_mount2(const YCHAR *path,int read_only)
2267 int result=YAFFS_FAIL;
2268 struct yaffs_dev *dev=NULL;
2271 yaffsfs_SetError(-EFAULT);
2275 T(YAFFS_TRACE_MOUNT,(TSTR("yaffs: Mounting %s" TENDSTR),path));
2277 if(yaffsfs_CheckPath(path) < 0){
2278 yaffsfs_SetError(-ENAMETOOLONG);
2284 yaffsfs_InitHandles();
2286 dev = yaffsfs_FindMountPoint(path);
2288 if(!dev->is_mounted){
2289 dev->read_only = read_only ? 1 : 0;
2290 result = yaffs_guts_initialise(dev);
2291 if(result == YAFFS_FAIL)
2292 yaffsfs_SetError(-ENOMEM);
2293 retVal = result ? 0 : -1;
2297 yaffsfs_SetError(-EBUSY);
2299 yaffsfs_SetError(-ENODEV);
2306 int yaffs_mount(const YCHAR *path)
2308 return yaffs_mount2(path,0);
2311 int yaffs_sync(const YCHAR *path)
2314 struct yaffs_dev *dev=NULL;
2318 yaffsfs_SetError(-EFAULT);
2322 if(yaffsfs_CheckPath(path) < 0){
2323 yaffsfs_SetError(-ENAMETOOLONG);
2328 dev = yaffsfs_FindDevice(path,&dummy);
2330 if(!dev->is_mounted)
2331 yaffsfs_SetError(-EINVAL);
2332 else if(dev->read_only)
2333 yaffsfs_SetError(-EROFS);
2336 yaffs_flush_whole_cache(dev);
2337 yaffs_checkpoint_save(dev);
2342 yaffsfs_SetError(-ENODEV);
2349 int yaffs_remount(const YCHAR *path, int force, int read_only)
2352 struct yaffs_dev *dev=NULL;
2356 yaffsfs_SetError(-EFAULT);
2360 if(yaffsfs_CheckPath(path) < 0){
2361 yaffsfs_SetError(-ENAMETOOLONG);
2366 dev = yaffsfs_FindMountPoint(path);
2368 if(dev->is_mounted){
2372 yaffs_flush_whole_cache(dev);
2374 for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse && !force; i++){
2375 yh = & yaffsfs_handle[i];
2376 if(yh->useCount>0 &&
2377 yaffsfs_inode[yh->inodeId].iObj->my_dev == dev)
2378 inUse = 1; /* the device is in use, can't unmount */
2381 if(!inUse || force){
2383 yaffs_checkpoint_save(dev);
2384 dev->read_only = read_only ? 1 : 0;
2387 yaffsfs_SetError(-EBUSY);
2390 yaffsfs_SetError(-EINVAL);
2394 yaffsfs_SetError(-ENODEV);
2401 int yaffs_unmount2(const YCHAR *path, int force)
2404 struct yaffs_dev *dev=NULL;
2407 yaffsfs_SetError(-EFAULT);
2411 if(yaffsfs_CheckPath(path) < 0){
2412 yaffsfs_SetError(-ENAMETOOLONG);
2417 dev = yaffsfs_FindMountPoint(path);
2419 if(dev->is_mounted){
2423 yaffs_flush_whole_cache(dev);
2424 yaffs_checkpoint_save(dev);
2426 for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++){
2427 if(yaffsfs_handle[i].useCount > 0 &&
2428 yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->my_dev == dev)
2429 inUse = 1; /* the device is in use, can't unmount */
2432 if(!inUse || force){
2434 yaffsfs_BreakDeviceHandles(dev);
2435 yaffs_deinitialise(dev);
2439 yaffsfs_SetError(-EBUSY);
2442 yaffsfs_SetError(-EINVAL);
2445 yaffsfs_SetError(-ENODEV);
2452 int yaffs_unmount(const YCHAR *path)
2454 return yaffs_unmount2(path,0);
2457 loff_t yaffs_freespace(const YCHAR *path)
2460 struct yaffs_dev *dev=NULL;
2464 yaffsfs_SetError(-EFAULT);
2468 if(yaffsfs_CheckPath(path) < 0){
2469 yaffsfs_SetError(-ENAMETOOLONG);
2474 dev = yaffsfs_FindDevice(path,&dummy);
2475 if(dev && dev->is_mounted){
2476 retVal = yaffs_get_n_free_chunks(dev);
2477 retVal *= dev->data_bytes_per_chunk;
2480 yaffsfs_SetError(-EINVAL);
2486 loff_t yaffs_totalspace(const YCHAR *path)
2489 struct yaffs_dev *dev=NULL;
2492 if(yaffsfs_CheckPath(path) < 0){
2493 yaffsfs_SetError(-ENAMETOOLONG);
2498 dev = yaffsfs_FindDevice(path,&dummy);
2499 if(dev && dev->is_mounted){
2500 retVal = (dev->param.end_block - dev->param.start_block + 1) -
2501 dev->param.n_reserved_blocks;
2502 retVal *= dev->param.chunks_per_block;
2503 retVal *= dev->data_bytes_per_chunk;
2506 yaffsfs_SetError(-EINVAL);
2512 int yaffs_inodecount(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);
2530 if(dev && dev->is_mounted) {
2531 int n_obj = dev->n_obj;
2532 if(n_obj > dev->n_hardlinks)
2533 retVal = n_obj - dev->n_hardlinks;
2537 yaffsfs_SetError(-EINVAL);
2544 void yaffs_add_device(struct yaffs_dev *dev)
2546 dev->is_mounted = 0;
2547 dev->param.remove_obj_fn = yaffsfs_RemoveObjectCallback;
2549 if(!dev->dev_list.next)
2550 INIT_LIST_HEAD(&dev->dev_list);
2552 list_add(&dev->dev_list,&yaffsfs_deviceList);
2555 void yaffs_remove_device(struct yaffs_dev *dev)
2557 list_del_init(&dev->dev_list);
2563 /* Directory search stuff. */
2566 * Directory search context
2568 * NB this is an opaque structure.
2575 yaffs_dirent de; /* directory entry being used by this dsc */
2576 YCHAR name[NAME_MAX+1]; /* name of directory being searched */
2577 struct yaffs_obj *dirObj; /* ptr to directory being searched */
2578 struct yaffs_obj *nextReturn; /* obj to be returned by next readddir */
2580 struct list_head others;
2581 } yaffsfs_DirectorySearchContext;
2585 static struct list_head search_contexts;
2588 static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc)
2592 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
2596 if( list_empty(&dsc->dirObj->variant.dir_variant.children))
2597 dsc->nextReturn = NULL;
2599 dsc->nextReturn = list_entry(dsc->dirObj->variant.dir_variant.children.next,
2600 struct yaffs_obj,siblings);
2602 /* Hey someone isn't playing nice! */
2606 static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc)
2610 dsc->dirObj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
2612 if( dsc->nextReturn == NULL ||
2613 list_empty(&dsc->dirObj->variant.dir_variant.children))
2614 dsc->nextReturn = NULL;
2616 struct list_head *next = dsc->nextReturn->siblings.next;
2618 if( next == &dsc->dirObj->variant.dir_variant.children)
2619 dsc->nextReturn = NULL; /* end of list */
2621 dsc->nextReturn = list_entry(next,struct yaffs_obj,siblings);
2624 /* Hey someone isn't playing nice! */
2628 static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj)
2631 struct list_head *i;
2632 yaffsfs_DirectorySearchContext *dsc;
2634 /* if search contexts not initilised then skip */
2635 if(!search_contexts.next)
2638 /* Iterate through the directory search contexts.
2639 * If any are the one being removed, then advance the dsc to
2640 * the next one to prevent a hanging ptr.
2642 list_for_each(i, &search_contexts) {
2644 dsc = list_entry(i, yaffsfs_DirectorySearchContext,others);
2645 if(dsc->nextReturn == obj)
2646 yaffsfs_DirAdvance(dsc);
2652 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
2654 yaffs_DIR *dir = NULL;
2655 struct yaffs_obj *obj = NULL;
2656 yaffsfs_DirectorySearchContext *dsc = NULL;
2661 yaffsfs_SetError(-EFAULT);
2665 if(yaffsfs_CheckPath(dirname) < 0){
2666 yaffsfs_SetError(-ENAMETOOLONG);
2672 obj = yaffsfs_FindObject(NULL,dirname,0,1,NULL,¬Dir,&loop);
2675 yaffsfs_SetError(-ENOTDIR);
2677 yaffsfs_SetError(-ELOOP);
2679 yaffsfs_SetError(-ENOENT);
2680 else if(obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
2681 yaffsfs_SetError(-ENOTDIR);
2684 dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));
2685 dir = (yaffs_DIR *)dsc;
2688 memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext));
2689 dsc->magic = YAFFS_MAGIC;
2691 yaffs_strncpy(dsc->name,dirname,NAME_MAX);
2692 INIT_LIST_HEAD(&dsc->others);
2694 if(!search_contexts.next)
2695 INIT_LIST_HEAD(&search_contexts);
2697 list_add(&dsc->others,&search_contexts);
2698 yaffsfs_SetDirRewound(dsc);
2708 struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp)
2710 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2711 struct yaffs_dirent *retVal = NULL;
2715 if(dsc && dsc->magic == YAFFS_MAGIC){
2716 yaffsfs_SetError(0);
2717 if(dsc->nextReturn){
2718 dsc->de.d_ino = yaffs_get_equivalent_obj(dsc->nextReturn)->obj_id;
2719 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
2720 dsc->de.d_off = dsc->offset++;
2721 yaffs_get_obj_name(dsc->nextReturn,dsc->de.d_name,NAME_MAX);
2722 if(yaffs_strnlen(dsc->de.d_name,NAME_MAX+1) == 0)
2724 /* this should not happen! */
2725 yaffs_strcpy(dsc->de.d_name,_Y("zz"));
2727 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
2729 yaffsfs_DirAdvance(dsc);
2733 yaffsfs_SetError(-EBADF);
2742 void yaffs_rewinddir(yaffs_DIR *dirp)
2744 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2748 yaffsfs_SetDirRewound(dsc);
2754 int yaffs_closedir(yaffs_DIR *dirp)
2756 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2759 yaffsfs_SetError(-EFAULT);
2765 list_del(&dsc->others); /* unhook from list */
2771 /* End of directory stuff */
2774 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
2776 struct yaffs_obj *parent = NULL;
2777 struct yaffs_obj *obj;
2780 int mode = 0; /* ignore for now */
2784 if(!oldpath || !newpath){
2785 yaffsfs_SetError(-EFAULT);
2789 if(yaffsfs_CheckPath(newpath) < 0){
2790 yaffsfs_SetError(-ENAMETOOLONG);
2794 parent = yaffsfs_FindDirectory(NULL,newpath,&name,0,¬Dir,&loop);
2795 if(!parent && notDir)
2796 yaffsfs_SetError(-ENOTDIR);
2798 yaffsfs_SetError(-ELOOP);
2799 else if( !parent || yaffs_strnlen(name,5) < 1)
2800 yaffsfs_SetError(-ENOENT);
2801 else if(parent->my_dev->read_only)
2802 yaffsfs_SetError(-EROFS);
2804 obj = yaffs_create_symlink(parent,name,mode,0,0,oldpath);
2807 else if (yaffsfs_FindObject(NULL,newpath,0,0, NULL,NULL,NULL))
2808 yaffsfs_SetError(-EEXIST);
2810 yaffsfs_SetError(-ENOSPC);
2819 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
2821 struct yaffs_obj *obj = NULL;
2822 struct yaffs_obj *dir = NULL;
2828 yaffsfs_SetError(-EFAULT);
2834 obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
2837 yaffsfs_SetError(-ENOTDIR);
2839 yaffsfs_SetError(-ELOOP);
2840 else if(!dir || !obj)
2841 yaffsfs_SetError(-ENOENT);
2842 else if(obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
2843 yaffsfs_SetError(-EINVAL);
2845 YCHAR *alias = obj->variant.symlink_variant.alias;
2846 memset(buf,0,bufsiz);
2847 yaffs_strncpy(buf,alias,bufsiz - 1);
2854 int yaffs_link(const YCHAR *oldpath, const YCHAR *linkpath)
2856 /* Creates a link called newpath to existing oldpath */
2857 struct yaffs_obj *obj = NULL;
2858 struct yaffs_obj *lnk = NULL;
2859 struct yaffs_obj *obj_dir = NULL;
2860 struct yaffs_obj *lnk_dir = NULL;
2868 if(!oldpath || !linkpath){
2869 yaffsfs_SetError(-EFAULT);
2873 if(yaffsfs_CheckPath(linkpath) < 0){
2874 yaffsfs_SetError(-ENAMETOOLONG);
2880 obj = yaffsfs_FindObject(NULL,oldpath,0,1,&obj_dir,¬DirObj,&objLoop);
2881 lnk = yaffsfs_FindObject(NULL,linkpath,0,0,NULL,NULL,NULL);
2882 lnk_dir = yaffsfs_FindDirectory(NULL,linkpath,&newname,0,¬DirLnk,&lnkLoop);
2884 if((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
2885 yaffsfs_SetError(-ENOTDIR);
2886 else if(objLoop || lnkLoop)
2887 yaffsfs_SetError(-ELOOP);
2888 else if(!obj_dir || !lnk_dir || !obj)
2889 yaffsfs_SetError(-ENOENT);
2890 else if(obj->my_dev->read_only)
2891 yaffsfs_SetError(-EROFS);
2893 yaffsfs_SetError(-EEXIST);
2894 else if(lnk_dir->my_dev != obj->my_dev)
2895 yaffsfs_SetError(-EXDEV);
2897 retVal = yaffsfs_CheckNameLength(newname);
2900 lnk = yaffs_link_obj(lnk_dir,newname,obj);
2904 yaffsfs_SetError(-ENOSPC);
2914 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
2920 yaffsfs_SetError(-EINVAL);
2926 * D E B U G F U N C T I O N S
2931 * Returns number of handles attached to the object
2933 int yaffs_n_handles(const YCHAR *path)
2935 struct yaffs_obj *obj;
2938 yaffsfs_SetError(-EFAULT);
2942 if(yaffsfs_CheckPath(path) < 0){
2943 yaffsfs_SetError(-ENAMETOOLONG);
2947 obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
2950 return yaffsfs_CountHandles(obj);
2955 int yaffs_get_error(void)
2957 return yaffsfs_GetLastError();
2960 int yaffs_set_error(int error)
2962 yaffsfs_SetError(error);
2966 int yaffs_dump_dev(const YCHAR *path)
2973 struct yaffs_obj *obj = yaffsfs_FindRoot(path,&rest);
2976 struct yaffs_dev *dev = obj->my_dev;
2979 "n_page_writes.......... %d\n"
2980 "n_page_reads........... %d\n"
2981 "n_erasures....... %d\n"
2982 "n_gc_copies............ %d\n"
2983 "garbageCollections... %d\n"
2984 "passiveGarbageColl'ns %d\n"
2990 dev->garbageCollections,
2991 dev->passiveGarbageCollections