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 yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const YCHAR *path, int symDepth);
35 static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj);
37 unsigned int yaffs_wr_attempts;
41 * There are open inodes in yaffsfs_Inode.
42 * There are open handles in yaffsfs_Handle.
44 * Things are structured this way to be like the Linux VFS model
45 * so that interactions with the yaffs guts calls are similar.
46 * That means more common code paths and less special code.
47 * That means better testing etc.
51 int count; /* Number of handles accessing this inode */
58 int inodeId:13; /* Index to corresponding yaffsfs_Inode */
59 int useCount:16; /* Use count for this handle */
60 __u32 position; /* current position in file */
63 static yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
64 static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
68 * Inilitalise handle management on start-up.
71 static int yaffsfs_InitHandles(void)
74 memset(yaffsfs_inode,0,sizeof(yaffsfs_inode));
75 memset(yaffsfs_handle,0,sizeof(yaffsfs_handle));
76 for(i = 0; i < YAFFSFS_N_HANDLES; i++)
77 yaffsfs_handle[i].inodeId = -1;
82 yaffsfs_Handle *yaffsfs_GetHandlePointer(int h)
84 if(h < 0 || h >= YAFFSFS_N_HANDLES)
87 return &yaffsfs_handle[h];
90 yaffsfs_Inode *yaffsfs_GetInodePointer(int handle)
92 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
94 if(h && h->useCount > 0 && h->inodeId >= 0 && h->inodeId < YAFFSFS_N_HANDLES)
95 return &yaffsfs_inode[h->inodeId];
100 yaffs_Object *yaffsfs_GetHandleObject(int handle)
102 yaffsfs_Inode *in = yaffsfs_GetInodePointer(handle);
111 * yaffsfs_GetInodeIdForObject
112 * Grab an inode entry when opening a new inode.
115 static int yaffsfs_GetInodeIdForObject(yaffs_Object *obj)
119 yaffsfs_Inode *in = NULL;
122 obj = yaffs_GetEquivalentObject(obj);
124 /* Look for it. If we can't find it then make one */
125 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
126 if(yaffsfs_inode[i].iObj == obj)
130 for(i = 0; i < YAFFSFS_N_HANDLES && ret < 0; i++){
131 if(!yaffsfs_inode[i].iObj)
137 in = &yaffsfs_inode[ret];
148 static void yaffsfs_ReleaseInode(yaffsfs_Inode *in)
155 yaffs_DeleteObject(obj);
162 static void yaffsfs_PutInode(int inodeId)
164 if(inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES){
165 yaffsfs_Inode *in = & yaffsfs_inode[inodeId];
168 yaffsfs_ReleaseInode(in);
175 * Grab a handle (when opening a file)
178 static int yaffsfs_GetNewHandle(void)
183 for(i = 0; i < YAFFSFS_N_HANDLES; i++){
184 h = yaffsfs_GetHandlePointer(i);
186 /* todo bug: should never happen */
189 memset(h,0,sizeof(yaffsfs_Handle));
200 * Increase use of handle when reading/writing a file
202 static int yaffsfs_GetHandle(int handle)
204 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
206 if(h && h->useCount > 0){
214 * Let go of a handle when closing a file or aborting an open or
215 * ending a read or write.
217 static int yaffsfs_PutHandle(int handle)
219 yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
221 if(h && h->useCount > 0){
225 yaffsfs_PutInode(h->inodeId);
237 * Stuff to search for a directory from a path
241 int yaffsfs_Match(YCHAR a, YCHAR b)
247 int yaffsfs_IsPathDivider(YCHAR ch)
249 YCHAR *str = YAFFS_PATH_DIVIDERS;
262 YLIST_HEAD(yaffsfs_deviceList);
267 * Scan the configuration list to find the root.
268 * Curveballs: Should match paths that end in '/' too
269 * Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
271 static yaffs_Device *yaffsfs_FindDevice(const YCHAR *path, YCHAR **restOfPath)
273 struct ylist_head *cfg;
274 const YCHAR *leftOver;
276 yaffs_Device *retval = NULL;
277 yaffs_Device *dev = NULL;
279 int longestMatch = -1;
283 * Check all configs, choose the one that:
284 * 1) Actually matches a prefix (ie /a amd /abc will not match
285 * 2) Matches the longest.
287 ylist_for_each(cfg, &yaffsfs_deviceList){
288 dev = ylist_entry(cfg, yaffs_Device, devList);
295 while(matching && *p && *leftOver){
296 /* Skip over any /s */
297 while(yaffsfs_IsPathDivider(*p))
300 /* Skip over any /s */
301 while(yaffsfs_IsPathDivider(*leftOver))
304 /* Now match the text part */
306 *p && !yaffsfs_IsPathDivider(*p) &&
307 *leftOver && !yaffsfs_IsPathDivider(*leftOver)){
308 if(yaffsfs_Match(*p,*leftOver)){
318 /* Skip over any /s in leftOver */
319 while(yaffsfs_IsPathDivider(*leftOver))
322 // Skip over any /s in p
323 while(yaffsfs_IsPathDivider(*p))
326 // p should now be at the end of the string (ie. fully matched)
330 if( matching && (thisMatchLength > longestMatch))
333 *restOfPath = (YCHAR *)leftOver;
335 longestMatch = thisMatchLength;
343 static yaffs_Device *yaffsfs_FindDevice(const YCHAR *path, YCHAR **restOfPath)
345 yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList;
346 const YCHAR *leftOver;
348 yaffs_Device *retval = NULL;
350 int longestMatch = -1;
353 * Check all configs, choose the one that:
354 * 1) Actually matches a prefix (ie /a amd /abc will not match
355 * 2) Matches the longest.
357 while(cfg && cfg->prefix && cfg->dev){
362 while(*p && /* unmatched part of prefix */
363 !(yaffsfs_IsPathDivider(*p) && (p[1] == 0)) &&
364 *leftOver && yaffsfs_Match(*p,*leftOver)){
371 if((!*p || (yaffsfs_IsPathDivider(*p) && (p[1] == 0))) && /* end of prefix */
372 (!*leftOver || yaffsfs_IsPathDivider(*leftOver)) && /* no more in this path name part */
373 (thisMatchLength > longestMatch)){
375 *restOfPath = (YCHAR *)leftOver;
377 longestMatch = thisMatchLength;
385 static yaffs_Object *yaffsfs_FindRoot(const YCHAR *path, YCHAR **restOfPath)
390 dev= yaffsfs_FindDevice(path,restOfPath);
391 if(dev && dev->isMounted){
397 static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth)
400 while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK){
401 YCHAR *alias = obj->variant.symLinkVariant.alias;
403 if(yaffsfs_IsPathDivider(*alias))
404 /* Starts with a /, need to scan from root up */
405 obj = yaffsfs_FindObject(NULL,alias,symDepth++);
407 /* Relative to here, so use the parent of the symlink as a start */
408 obj = yaffsfs_FindObject(obj->parent,alias,symDepth++);
415 * yaffsfs_FindDirectory
416 * Parse a path to determine the directory and the name within the directory.
418 * eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
420 static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,
421 const YCHAR *path, YCHAR **name, int symDepth)
425 YCHAR str[YAFFS_MAX_NAME_LENGTH+1];
428 if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES)
433 restOfPath = (YCHAR *)path;
436 dir = yaffsfs_FindRoot(path,&restOfPath);
441 * curve ball: also throw away surplus '/'
442 * eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
444 while(yaffsfs_IsPathDivider(*restOfPath))
445 restOfPath++; /* get rid of '/' */
450 while(*restOfPath && !yaffsfs_IsPathDivider(*restOfPath)){
451 if (i < YAFFS_MAX_NAME_LENGTH){
452 str[i] = *restOfPath;
460 /* got to the end of the string */
463 if(yaffs_strcmp(str,_Y(".")) == 0)
467 else if(yaffs_strcmp(str,_Y("..")) == 0)
470 dir = yaffs_FindObjectByName(dir,str);
472 while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
473 dir = yaffsfs_FollowLink(dir,symDepth);
476 if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
481 /* directory did not exist. */
485 static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,
486 const YCHAR *path,YCHAR **name,int symDepth)
488 return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth);
492 * yaffsfs_FindObject turns a path for an existing object into the object
494 static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const YCHAR *path,int symDepth)
499 dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth);
502 return yaffs_FindObjectByName(dir,name);
508 int yaffs_dup(int fd)
511 yaffsfs_Handle *oldPtr = NULL;
512 yaffsfs_Handle *newPtr = NULL;
516 oldPtr = yaffsfs_GetHandlePointer(fd);
517 if(oldPtr && oldPtr->useCount > 0)
518 newHandle = yaffsfs_GetNewHandle();
520 newPtr = yaffsfs_GetHandlePointer(newHandle);
528 yaffsfs_SetError(-EBADF);
530 yaffsfs_SetError(-ENOMEM);
536 int yaffs_open(const YCHAR *path, int oflag, int mode)
538 yaffs_Object *obj = NULL;
539 yaffs_Object *dir = NULL;
542 yaffsfs_Handle *h = NULL;
545 int errorReported = 0;
547 /* O_EXCL only has meaning if O_CREAT is specified */
548 if(!(oflag & O_CREAT))
551 /* O_TRUNC has no meaning if (O_CREAT | O_EXCL) is specified */
552 if( (oflag & O_CREAT) & (oflag & O_EXCL))
555 /* Todo: Are there any more flag combos to sanitise ? */
560 handle = yaffsfs_GetNewHandle();
564 h = yaffsfs_GetHandlePointer(handle);
567 /* try to find the exisiting object */
568 obj = yaffsfs_FindObject(NULL,path,0);
570 if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
571 obj = yaffsfs_FollowLink(obj,symDepth++);
574 obj = yaffs_GetEquivalentObject(obj);
577 obj->variantType != YAFFS_OBJECT_TYPE_FILE &&
578 obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
583 /* The file already exists or it might be a directory */
585 /* If it is a directory then we can't open it as a file */
586 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
588 yaffsfs_SetError(-EISDIR);
592 /* Open should fail if O_CREAT and O_EXCL are specified since
595 if((oflag & O_EXCL) && (oflag & O_CREAT)){
597 yaffsfs_SetError(-EEXIST);
601 /* Check file permissions */
602 if( (oflag & (O_RDWR | O_WRONLY)) == 0 && /* ie O_RDONLY */
603 !(obj->yst_mode & S_IREAD))
606 if( (oflag & O_RDWR) &&
607 !(obj->yst_mode & S_IREAD))
610 if( (oflag & (O_RDWR | O_WRONLY)) &&
611 !(obj->yst_mode & S_IWRITE))
614 } else if((oflag & O_CREAT)) {
615 /* Let's see if we can create this file */
616 dir = yaffsfs_FindDirectory(NULL,path,&name,0);
617 if(dir && dir->myDev->readOnly){
618 yaffsfs_SetError(-EINVAL);
621 obj = yaffs_MknodFile(dir,name,mode,0,0);
623 yaffsfs_SetError(-ENOTDIR);
628 if(obj && !openDenied) {
629 int inodeId = yaffsfs_GetInodeIdForObject(obj);
633 * Todo: Fix any problem if inodes run out, though that
634 * can't happen if the number of inode items >= number of handles.
638 h->inodeId = inodeId;
639 h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1;
640 h->append = (oflag & O_APPEND) ? 1 : 0;
643 /* Hook inode to object */
644 obj->myInode = (void*) &yaffsfs_inode[inodeId];
646 if((oflag & O_TRUNC) && !h->readOnly)
647 yaffs_ResizeFile(obj,0);
649 yaffsfs_PutHandle(handle);
651 yaffsfs_SetError(-EACCES);
663 int yaffs_Dofsync(int fd,int datasync)
665 yaffsfs_Handle *h = NULL;
670 h = yaffsfs_GetHandlePointer(fd);
672 if(h && h->useCount > 0)
674 yaffs_FlushFile(yaffsfs_inode[h->inodeId].iObj,1,datasync);
677 yaffsfs_SetError(-EBADF);
686 int yaffs_fsync(int fd)
688 return yaffs_Dofsync(fd,0);
691 int yaffs_flush(int fd)
693 return yaffs_fsync(fd);
696 int yaffs_fdatasync(int fd)
698 return yaffs_Dofsync(fd,1);
701 int yaffs_close(int fd)
703 yaffsfs_Handle *h = NULL;
708 h = yaffsfs_GetHandlePointer(fd);
710 if(h && h->useCount > 0) {
712 yaffs_FlushFile(yaffsfs_inode[h->inodeId].iObj,1,0);
713 yaffsfs_PutHandle(fd);
717 yaffsfs_SetError(-EBADF);
728 int yaffsfs_do_read(int fd, void *vbuf, unsigned int nbyte, int isPread, int offset)
730 yaffsfs_Handle *h = NULL;
731 yaffs_Object *obj = NULL;
737 unsigned int maxRead;
738 __u8 *buf = (__u8 *)vbuf;
741 h = yaffsfs_GetHandlePointer(fd);
742 obj = yaffsfs_GetHandleObject(fd);
746 yaffsfs_SetError(-EBADF);
748 } else if( h && obj){
752 startPos = h->position;
756 if(yaffs_GetObjectFileLength(obj) > pos)
757 maxRead = yaffs_GetObjectFileLength(obj) - pos;
765 yaffsfs_GetHandle(fd);
768 nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
771 nRead = yaffs_ReadDataFromFile(obj,buf,pos,nToRead);
782 nbyte = 0; /* no more to read */
792 yaffsfs_PutHandle(fd);
796 h->position = startPos + totalRead;
806 return (totalRead >= 0) ? totalRead : -1;
810 int yaffs_read(int fd, void *buf, unsigned int nbyte)
812 return yaffsfs_do_read(fd, buf, nbyte, 0, 0);
815 int yaffs_pread(int fd, void *buf, unsigned int nbyte, unsigned int offset)
817 return yaffsfs_do_read(fd, buf, nbyte, 1, offset);
820 int yaffsfs_do_write(int fd, const void *vbuf, unsigned int nbyte, int isPwrite, int offset)
822 yaffsfs_Handle *h = NULL;
823 yaffs_Object *obj = NULL;
827 int totalWritten = 0;
828 int writeThrough = 0;
830 const __u8 *buf = (const __u8 *)vbuf;
833 h = yaffsfs_GetHandlePointer(fd);
834 obj = yaffsfs_GetHandleObject(fd);
838 yaffsfs_SetError(-EBADF);
840 } else if( h && obj && (h->readOnly || obj->myDev->readOnly)){
841 yaffsfs_SetError(-EINVAL);
843 } else if( h && obj){
845 startPos = yaffs_GetObjectFileLength(obj);
849 startPos = h->position;
851 yaffsfs_GetHandle(fd);
854 nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
858 nWritten = yaffs_WriteDataToFile(obj,buf,pos,nToWrite,writeThrough);
860 totalWritten += nWritten;
865 if(nWritten == nToWrite)
870 if(nWritten < 1 && totalWritten < 1){
871 yaffsfs_SetError(-ENOSPC);
881 yaffsfs_PutHandle(fd);
885 h->position = startPos + totalWritten;
894 return (totalWritten >= 0) ? totalWritten : -1;
897 int yaffs_write(int fd, const void *buf, unsigned int nbyte)
899 return yaffsfs_do_write(fd, buf, nbyte, 0, 0);
902 int yaffs_pwrite(int fd, const void *buf, unsigned int nbyte, unsigned int offset)
904 return yaffsfs_do_write(fd, buf, nbyte, 1, offset);
908 int yaffs_truncate(const YCHAR *path,off_t newSize)
910 yaffs_Object *obj = NULL;
911 int result = YAFFS_FAIL;
915 obj = yaffsfs_FindObject(NULL,path,0);
917 obj = yaffs_GetEquivalentObject(obj);
920 yaffsfs_SetError(-ENOENT);
921 else if(obj->variantType != YAFFS_OBJECT_TYPE_FILE)
922 yaffsfs_SetError(-EISDIR);
923 else if(obj->myDev->readOnly)
924 yaffsfs_SetError(-EINVAL);
926 result = yaffs_ResizeFile(obj,newSize);
931 return (result) ? 0 : -1;
934 int yaffs_ftruncate(int fd, off_t newSize)
936 yaffsfs_Handle *h = NULL;
937 yaffs_Object *obj = NULL;
941 h = yaffsfs_GetHandlePointer(fd);
942 obj = yaffsfs_GetHandleObject(fd);
946 yaffsfs_SetError(-EBADF);
947 else if(obj->myDev->readOnly)
948 yaffsfs_SetError(-EINVAL);
950 /* resize the file */
951 result = yaffs_ResizeFile(obj,newSize);
955 return (result) ? 0 : -1;
959 off_t yaffs_lseek(int fd, off_t offset, int whence)
961 yaffsfs_Handle *h = NULL;
962 yaffs_Object *obj = NULL;
967 h = yaffsfs_GetHandlePointer(fd);
968 obj = yaffsfs_GetHandleObject(fd);
972 yaffsfs_SetError(-EBADF);
973 else if(whence == SEEK_SET){
977 else if(whence == SEEK_CUR) {
978 if( (h->position + offset) >= 0)
979 pos = (h->position + offset);
981 else if(whence == SEEK_END) {
982 fSize = yaffs_GetObjectFileLength(obj);
983 if(fSize >= 0 && (fSize + offset) >= 0)
984 pos = fSize + offset;
1000 int yaffsfs_DoUnlink(const YCHAR *path,int isDirectory)
1002 yaffs_Object *dir = NULL;
1003 yaffs_Object *obj = NULL;
1005 int result = YAFFS_FAIL;
1009 obj = yaffsfs_FindObject(NULL,path,0);
1010 dir = yaffsfs_FindDirectory(NULL,path,&name,0);
1012 yaffsfs_SetError(-ENOTDIR);
1014 yaffsfs_SetError(-ENOENT);
1015 else if(obj->myDev->readOnly)
1016 yaffsfs_SetError(-EINVAL);
1017 else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
1018 yaffsfs_SetError(-EISDIR);
1019 else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
1020 yaffsfs_SetError(-ENOTDIR);
1022 result = yaffs_Unlink(dir,name);
1024 if(result == YAFFS_FAIL && isDirectory)
1025 yaffsfs_SetError(-ENOTEMPTY);
1032 return (result == YAFFS_FAIL) ? -1 : 0;
1036 int yaffs_rmdir(const YCHAR *path)
1038 return yaffsfs_DoUnlink(path,1);
1041 int yaffs_unlink(const YCHAR *path)
1043 return yaffsfs_DoUnlink(path,0);
1046 int yaffs_rename(const YCHAR *oldPath, const YCHAR *newPath)
1048 yaffs_Object *olddir = NULL;
1049 yaffs_Object *newdir = NULL;
1050 yaffs_Object *obj = NULL;
1053 int result= YAFFS_FAIL;
1054 int renameAllowed = 1;
1058 olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0);
1059 newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0);
1060 obj = yaffsfs_FindObject(NULL,oldPath,0);
1062 if(!olddir || !newdir || !obj) {
1064 yaffsfs_SetError(-EBADF);
1066 } else if(obj->myDev->readOnly){
1067 yaffsfs_SetError(-EINVAL);
1069 } else if(olddir->myDev != newdir->myDev) {
1070 /* oops must be on same device */
1072 yaffsfs_SetError(-EXDEV);
1074 } else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY) {
1076 * It is a directory, check that it is not being renamed to
1077 * being its own decendent.
1078 * Do this by tracing from the new directory back to the root, checking for obj
1081 yaffs_Object *xx = newdir;
1083 while( renameAllowed && xx){
1089 yaffsfs_SetError(-EACCES);
1093 result = yaffs_RenameObject(olddir,oldname,newdir,newname);
1097 return (result == YAFFS_FAIL) ? -1 : 0;
1101 static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf)
1106 obj = yaffs_GetEquivalentObject(obj);
1109 buf->st_dev = (int)obj->myDev->osContext;
1110 buf->st_ino = obj->objectId;
1111 buf->st_mode = obj->yst_mode & ~S_IFMT; /* clear out file type bits */
1113 if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
1114 buf->st_mode |= S_IFDIR;
1115 else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
1116 buf->st_mode |= S_IFLNK;
1117 else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
1118 buf->st_mode |= S_IFREG;
1120 buf->st_nlink = yaffs_GetObjectLinkCount(obj);
1123 buf->st_rdev = obj->yst_rdev;
1124 buf->st_size = yaffs_GetObjectFileLength(obj);
1125 buf->st_blksize = obj->myDev->nDataBytesPerChunk;
1126 buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
1127 #if CONFIG_YAFFS_WINCE
1128 buf->yst_wince_atime[0] = obj->win_atime[0];
1129 buf->yst_wince_atime[1] = obj->win_atime[1];
1130 buf->yst_wince_ctime[0] = obj->win_ctime[0];
1131 buf->yst_wince_ctime[1] = obj->win_ctime[1];
1132 buf->yst_wince_mtime[0] = obj->win_mtime[0];
1133 buf->yst_wince_mtime[1] = obj->win_mtime[1];
1135 buf->yst_atime = obj->yst_atime;
1136 buf->yst_ctime = obj->yst_ctime;
1137 buf->yst_mtime = obj->yst_mtime;
1144 static int yaffsfs_DoStatOrLStat(const YCHAR *path, struct yaffs_stat *buf,int doLStat)
1151 obj = yaffsfs_FindObject(NULL,path,0);
1154 obj = yaffsfs_FollowLink(obj,0);
1157 retVal = yaffsfs_DoStat(obj,buf);
1159 /* todo error not found */
1160 yaffsfs_SetError(-ENOENT);
1168 int yaffs_stat(const YCHAR *path, struct yaffs_stat *buf)
1170 return yaffsfs_DoStatOrLStat(path,buf,0);
1173 int yaffs_lstat(const YCHAR *path, struct yaffs_stat *buf)
1175 return yaffsfs_DoStatOrLStat(path,buf,1);
1178 int yaffs_fstat(int fd, struct yaffs_stat *buf)
1185 obj = yaffsfs_GetHandleObject(fd);
1188 retVal = yaffsfs_DoStat(obj,buf);
1191 yaffsfs_SetError(-EBADF);
1198 #ifndef CONFIG_YAFFS_WINCE
1199 /* xattrib functions */
1202 static int yaffs_do_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags, int follow)
1209 obj = yaffsfs_FindObject(NULL,path,0);
1212 obj = yaffsfs_FollowLink(obj,0);
1215 retVal = yaffs_SetXAttribute(obj,name,data,size,flags);
1217 yaffsfs_SetError(retVal);
1221 /* todo error not found */
1222 yaffsfs_SetError(-ENOENT);
1230 int yaffs_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1232 return yaffs_do_setxattr(path, name, data, size, flags, 1);
1235 int yaffs_lsetxattr(const YCHAR *path, const char *name, const void *data, int size, int flags)
1237 return yaffs_do_setxattr(path, name, data, size, flags, 0);
1242 int yaffs_fsetxattr(int fd, const char *name, const void *data, int size, int flags)
1249 obj = yaffsfs_GetHandleObject(fd);
1252 retVal = yaffs_SetXAttribute(obj,name,data,size,flags);
1254 yaffsfs_SetError(retVal);
1259 yaffsfs_SetError(-EBADF);
1266 static int yaffs_do_getxattr(const YCHAR *path, const char *name, void *data, int size, int follow)
1273 obj = yaffsfs_FindObject(NULL,path,0);
1276 obj = yaffsfs_FollowLink(obj,0);
1279 retVal = yaffs_GetXAttribute(obj,name,data,size);
1281 yaffsfs_SetError(retVal);
1285 /* todo error not found */
1286 yaffsfs_SetError(-ENOENT);
1294 int yaffs_getxattr(const YCHAR *path, const char *name, void *data, int size)
1296 return yaffs_do_getxattr( path, name, data, size, 1);
1298 int yaffs_lgetxattr(const YCHAR *path, const char *name, void *data, int size)
1300 return yaffs_do_getxattr( path, name, data, size, 0);
1305 int yaffs_fgetxattr(int fd, const char *name, void *data, int size)
1312 obj = yaffsfs_GetHandleObject(fd);
1315 retVal = yaffs_GetXAttribute(obj,name,data,size);
1317 yaffsfs_SetError(retVal);
1322 yaffsfs_SetError(-EBADF);
1329 static int yaffs_do_listxattr(const YCHAR *path, char *data, int size, int follow)
1336 obj = yaffsfs_FindObject(NULL,path,0);
1339 obj = yaffsfs_FollowLink(obj,0);
1342 retVal = yaffs_ListXAttributes(obj, data,size);
1344 yaffsfs_SetError(retVal);
1348 /* todo error not found */
1349 yaffsfs_SetError(-ENOENT);
1357 int yaffs_listxattr(const YCHAR *path, char *data, int size)
1359 return yaffs_do_listxattr(path, data, size, 1);
1362 int yaffs_llistxattr(const YCHAR *path, char *data, int size)
1364 return yaffs_do_listxattr(path, data, size, 0);
1367 int yaffs_flistxattr(int fd, char *data, int size)
1374 obj = yaffsfs_GetHandleObject(fd);
1377 retVal = yaffs_ListXAttributes(obj,data,size);
1379 yaffsfs_SetError(retVal);
1384 yaffsfs_SetError(-EBADF);
1391 static int yaffs_do_removexattr(const YCHAR *path, const char *name, int follow)
1398 obj = yaffsfs_FindObject(NULL,path,0);
1401 obj = yaffsfs_FollowLink(obj,0);
1404 retVal = yaffs_RemoveXAttribute(obj,name);
1406 yaffsfs_SetError(retVal);
1410 /* todo error not found */
1411 yaffsfs_SetError(-ENOENT);
1419 int yaffs_removexattr(const YCHAR *path, const char *name)
1421 return yaffs_do_removexattr(path, name, 1);
1424 int yaffs_lremovexattr(const YCHAR *path, const char *name)
1426 return yaffs_do_removexattr(path, name, 0);
1429 int yaffs_fremovexattr(int fd, const char *name)
1436 obj = yaffsfs_GetHandleObject(fd);
1439 retVal = yaffs_RemoveXAttribute(obj,name);
1441 yaffsfs_SetError(retVal);
1446 yaffsfs_SetError(-EBADF);
1454 #ifdef CONFIG_YAFFS_WINCE
1455 int yaffs_get_wince_times(int fd, unsigned *wctime, unsigned *watime, unsigned *wmtime)
1462 obj = yaffsfs_GetHandleObject(fd);
1467 wctime[0] = obj->win_ctime[0];
1468 wctime[1] = obj->win_ctime[1];
1471 watime[0] = obj->win_atime[0];
1472 watime[1] = obj->win_atime[1];
1475 wmtime[0] = obj->win_mtime[0];
1476 wmtime[1] = obj->win_mtime[1];
1483 yaffsfs_SetError(-EBADF);
1491 int yaffs_set_wince_times(int fd,
1492 const unsigned *wctime,
1493 const unsigned *watime,
1494 const unsigned *wmtime)
1501 obj = yaffsfs_GetHandleObject(fd);
1506 obj->win_ctime[0] = wctime[0];
1507 obj->win_ctime[1] = wctime[1];
1510 obj->win_atime[0] = watime[0];
1511 obj->win_atime[1] = watime[1];
1514 obj->win_mtime[0] = wmtime[0];
1515 obj->win_mtime[1] = wmtime[1];
1519 result = yaffs_FlushFile(obj,0,0);
1523 yaffsfs_SetError(-EBADF);
1533 static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode)
1538 obj = yaffs_GetEquivalentObject(obj);
1541 obj->yst_mode = mode;
1543 result = yaffs_FlushFile(obj,0,0);
1546 return result == YAFFS_OK ? 0 : -1;
1550 int yaffs_access(const YCHAR *path, int amode)
1557 obj = yaffsfs_FindObject(NULL,path,0);
1562 if((amode & R_OK) && !(obj->yst_mode & S_IREAD))
1564 if((amode & W_OK) && !(obj->yst_mode & S_IWRITE))
1566 if((amode & X_OK) && !(obj->yst_mode & S_IEXEC))
1570 yaffsfs_SetError(-EACCES);
1574 /* todo error not found */
1575 yaffsfs_SetError(-ENOENT);
1586 int yaffs_chmod(const YCHAR *path, mode_t mode)
1593 obj = yaffsfs_FindObject(NULL,path,0);
1596 yaffsfs_SetError(-ENOENT);
1597 else if(obj->myDev->readOnly)
1598 yaffsfs_SetError(-EINVAL);
1600 retVal = yaffsfs_DoChMod(obj,mode);
1609 int yaffs_fchmod(int fd, mode_t mode)
1616 obj = yaffsfs_GetHandleObject(fd);
1619 yaffsfs_SetError(-ENOENT);
1620 else if(obj->myDev->readOnly)
1621 yaffsfs_SetError(-EINVAL);
1623 retVal = yaffsfs_DoChMod(obj,mode);
1631 int yaffs_mkdir(const YCHAR *path, mode_t mode)
1633 yaffs_Object *parent = NULL;
1634 yaffs_Object *dir = NULL;
1639 parent = yaffsfs_FindDirectory(NULL,path,&name,0);
1640 if(parent && parent->myDev->readOnly){
1641 yaffsfs_SetError(-EINVAL);
1644 dir = yaffs_MknodDirectory(parent,name,mode,0,0);
1649 yaffsfs_SetError(-ENOENT); /* missing path */
1650 else if (yaffs_FindObjectByName(parent,name))
1651 yaffsfs_SetError(-EEXIST); /* the name already exists */
1653 yaffsfs_SetError(-ENOSPC); /* just assume no space */
1663 void * yaffs_getdev(const YCHAR *path)
1665 yaffs_Device *dev=NULL;
1667 dev = yaffsfs_FindDevice(path,&dummy);
1671 int yaffs_mount2(const YCHAR *path,int readOnly)
1674 int result=YAFFS_FAIL;
1675 yaffs_Device *dev=NULL;
1678 T(YAFFS_TRACE_ALWAYS,(TSTR("yaffs: Mounting %s" TENDSTR),path));
1681 dev = yaffsfs_FindDevice(path,&dummy);
1683 if(!dev->isMounted){
1684 dev->readOnly = readOnly ? 1 : 0;
1685 result = yaffs_GutsInitialise(dev);
1686 if(result == YAFFS_FAIL)
1687 /* todo error - mount failed */
1688 yaffsfs_SetError(-ENOMEM);
1689 retVal = result ? 0 : -1;
1693 /* todo error - already mounted. */
1694 yaffsfs_SetError(-EBUSY);
1696 /* todo error - no device */
1697 yaffsfs_SetError(-ENODEV);
1704 int yaffs_mount(const YCHAR *path)
1706 return yaffs_mount2(path,0);
1709 int yaffs_sync(const YCHAR *path)
1712 yaffs_Device *dev=NULL;
1716 dev = yaffsfs_FindDevice(path,&dummy);
1720 yaffs_FlushEntireDeviceCache(dev);
1721 yaffs_CheckpointSave(dev);
1725 /* todo error - not mounted. */
1726 yaffsfs_SetError(-EINVAL);
1729 /* todo error - no device */
1730 yaffsfs_SetError(-ENODEV);
1737 int yaffs_remount(const YCHAR *path, int force, int readOnly)
1740 yaffs_Device *dev=NULL;
1744 dev = yaffsfs_FindDevice(path,&dummy);
1750 yaffs_FlushEntireDeviceCache(dev);
1752 for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse && !force; i++){
1753 if(yaffsfs_handle[i].useCount>0 && yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->myDev == dev)
1754 inUse = 1; /* the device is in use, can't unmount */
1757 if(!inUse || force){
1759 yaffs_CheckpointSave(dev);
1760 dev->readOnly = readOnly ? 1 : 0;
1763 yaffsfs_SetError(-EBUSY);
1766 yaffsfs_SetError(-EINVAL);
1770 yaffsfs_SetError(-ENODEV);
1777 int yaffs_unmount2(const YCHAR *path, int force)
1780 yaffs_Device *dev=NULL;
1784 dev = yaffsfs_FindDevice(path,&dummy);
1790 yaffs_FlushEntireDeviceCache(dev);
1791 yaffs_CheckpointSave(dev);
1793 for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++){
1794 if(yaffsfs_handle[i].useCount > 0 && yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->myDev == dev)
1795 inUse = 1; /* the device is in use, can't unmount */
1798 if(!inUse || force){
1799 yaffs_Deinitialise(dev);
1803 /* todo error can't unmount as files are open */
1804 yaffsfs_SetError(-EBUSY);
1807 /* todo error - not mounted. */
1808 yaffsfs_SetError(-EINVAL);
1812 /* todo error - no device */
1813 yaffsfs_SetError(-ENODEV);
1820 int yaffs_unmount(const YCHAR *path)
1822 return yaffs_unmount2(path,0);
1825 loff_t yaffs_freespace(const YCHAR *path)
1828 yaffs_Device *dev=NULL;
1832 dev = yaffsfs_FindDevice(path,&dummy);
1833 if(dev && dev->isMounted){
1834 retVal = yaffs_GetNumberOfFreeChunks(dev);
1835 retVal *= dev->nDataBytesPerChunk;
1838 yaffsfs_SetError(-EINVAL);
1844 loff_t yaffs_totalspace(const YCHAR *path)
1847 yaffs_Device *dev=NULL;
1851 dev = yaffsfs_FindDevice(path,&dummy);
1852 if(dev && dev->isMounted){
1853 retVal = (dev->param.endBlock - dev->param.startBlock + 1) - dev->param.nReservedBlocks;
1854 retVal *= dev->param.nChunksPerBlock;
1855 retVal *= dev->nDataBytesPerChunk;
1858 yaffsfs_SetError(-EINVAL);
1864 int yaffs_inodecount(const YCHAR *path)
1867 yaffs_Device *dev=NULL;
1871 dev = yaffsfs_FindDevice(path,&dummy);
1872 if(dev && dev->isMounted) {
1873 int nObjects = dev->nObjects;
1874 if(nObjects > dev->nHardLinks)
1875 retVal = nObjects - dev->nHardLinks;
1879 yaffsfs_SetError(-EINVAL);
1886 void yaffs_AddDevice(yaffs_Device *dev)
1889 dev->param.removeObjectCallback = yaffsfs_RemoveObjectCallback;
1891 if(!dev->devList.next)
1892 YINIT_LIST_HEAD(&dev->devList);
1894 ylist_add(&dev->devList,&yaffsfs_deviceList);
1897 void yaffs_RemoveDevice(yaffs_Device *dev)
1899 ylist_del_init(&dev->devList);
1905 /* Directory search stuff. */
1908 * Directory search context
1910 * NB this is an opaque structure.
1917 yaffs_dirent de; /* directory entry being used by this dsc */
1918 YCHAR name[NAME_MAX+1]; /* name of directory being searched */
1919 yaffs_Object *dirObj; /* ptr to directory being searched */
1920 yaffs_Object *nextReturn; /* obj to be returned by next readddir */
1922 struct ylist_head others;
1923 } yaffsfs_DirectorySearchContext;
1927 static struct ylist_head search_contexts;
1930 static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc)
1934 dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
1938 if( ylist_empty(&dsc->dirObj->variant.directoryVariant.children))
1939 dsc->nextReturn = NULL;
1941 dsc->nextReturn = ylist_entry(dsc->dirObj->variant.directoryVariant.children.next,
1942 yaffs_Object,siblings);
1944 /* Hey someone isn't playing nice! */
1948 static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc)
1952 dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
1954 if( dsc->nextReturn == NULL ||
1955 ylist_empty(&dsc->dirObj->variant.directoryVariant.children))
1956 dsc->nextReturn = NULL;
1958 struct ylist_head *next = dsc->nextReturn->siblings.next;
1960 if( next == &dsc->dirObj->variant.directoryVariant.children)
1961 dsc->nextReturn = NULL; /* end of list */
1963 dsc->nextReturn = ylist_entry(next,yaffs_Object,siblings);
1966 /* Hey someone isn't playing nice! */
1970 static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj)
1973 struct ylist_head *i;
1974 yaffsfs_DirectorySearchContext *dsc;
1976 /* if search contexts not initilised then skip */
1977 if(!search_contexts.next)
1980 /* Iterate through the directory search contexts.
1981 * If any are the one being removed, then advance the dsc to
1982 * the next one to prevent a hanging ptr.
1984 ylist_for_each(i, &search_contexts) {
1986 dsc = ylist_entry(i, yaffsfs_DirectorySearchContext,others);
1987 if(dsc->nextReturn == obj)
1988 yaffsfs_DirAdvance(dsc);
1994 yaffs_DIR *yaffs_opendir(const YCHAR *dirname)
1996 yaffs_DIR *dir = NULL;
1997 yaffs_Object *obj = NULL;
1998 yaffsfs_DirectorySearchContext *dsc = NULL;
2002 obj = yaffsfs_FindObject(NULL,dirname,0);
2004 if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
2006 dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));
2007 dir = (yaffs_DIR *)dsc;
2010 memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext));
2011 dsc->magic = YAFFS_MAGIC;
2013 yaffs_strncpy(dsc->name,dirname,NAME_MAX);
2014 YINIT_LIST_HEAD(&dsc->others);
2016 if(!search_contexts.next)
2017 YINIT_LIST_HEAD(&search_contexts);
2019 ylist_add(&dsc->others,&search_contexts);
2020 yaffsfs_SetDirRewound(dsc);
2030 struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp)
2032 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2033 struct yaffs_dirent *retVal = NULL;
2037 if(dsc && dsc->magic == YAFFS_MAGIC){
2038 yaffsfs_SetError(0);
2039 if(dsc->nextReturn){
2040 dsc->de.d_ino = yaffs_GetEquivalentObject(dsc->nextReturn)->objectId;
2041 dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
2042 dsc->de.d_off = dsc->offset++;
2043 yaffs_GetObjectName(dsc->nextReturn,dsc->de.d_name,NAME_MAX);
2044 if(yaffs_strnlen(dsc->de.d_name,NAME_MAX+1) == 0)
2046 /* this should not happen! */
2047 yaffs_strcpy(dsc->de.d_name,_Y("zz"));
2049 dsc->de.d_reclen = sizeof(struct yaffs_dirent);
2051 yaffsfs_DirAdvance(dsc);
2055 yaffsfs_SetError(-EBADF);
2064 void yaffs_rewinddir(yaffs_DIR *dirp)
2066 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2070 yaffsfs_SetDirRewound(dsc);
2076 int yaffs_closedir(yaffs_DIR *dirp)
2078 yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
2082 ylist_del(&dsc->others); /* unhook from list */
2088 /* End of directory stuff */
2091 int yaffs_symlink(const YCHAR *oldpath, const YCHAR *newpath)
2093 yaffs_Object *parent = NULL;
2097 int mode = 0; /* ignore for now */
2100 parent = yaffsfs_FindDirectory(NULL,newpath,&name,0);
2101 if(parent && parent->myDev->readOnly)
2102 yaffsfs_SetError(-EINVAL);
2104 obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath);
2108 yaffsfs_SetError(-ENOSPC); /* just assume no space for now */
2112 yaffsfs_SetError(-EINVAL);
2122 int yaffs_readlink(const YCHAR *path, YCHAR *buf, int bufsiz)
2124 yaffs_Object *obj = NULL;
2130 obj = yaffsfs_FindObject(NULL,path,0);
2133 yaffsfs_SetError(-ENOENT);
2135 } else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK) {
2136 yaffsfs_SetError(-EINVAL);
2139 YCHAR *alias = obj->variant.symLinkVariant.alias;
2140 memset(buf,0,bufsiz);
2141 yaffs_strncpy(buf,alias,bufsiz - 1);
2148 int yaffs_link(const YCHAR *oldpath, const YCHAR *newpath)
2150 /* Creates a link called newpath to existing oldpath */
2151 yaffs_Object *obj = NULL;
2152 yaffs_Object *target = NULL;
2154 int newNameLength = 0;
2159 obj = yaffsfs_FindObject(NULL,oldpath,0);
2160 target = yaffsfs_FindObject(NULL,newpath,0);
2163 yaffsfs_SetError(-ENOENT);
2165 } else if(obj->myDev->readOnly){
2166 yaffsfs_SetError(-EINVAL);
2169 yaffsfs_SetError(-EEXIST);
2172 yaffs_Object *newdir = NULL;
2173 yaffs_Object *link = NULL;
2177 newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0);
2180 yaffsfs_SetError(-ENOTDIR);
2182 }else if(newdir->myDev != obj->myDev){
2183 yaffsfs_SetError(-EXDEV);
2187 newNameLength = yaffs_strnlen(newname,YAFFS_MAX_NAME_LENGTH+1);
2189 if(newNameLength == 0){
2190 yaffsfs_SetError(-ENOENT);
2192 } else if (newNameLength > YAFFS_MAX_NAME_LENGTH){
2193 yaffsfs_SetError(-ENAMETOOLONG);
2198 link = yaffs_Link(newdir,newname,obj);
2202 yaffsfs_SetError(-ENOSPC);
2213 int yaffs_mknod(const YCHAR *pathname, mode_t mode, dev_t dev)
2218 int yaffs_DumpDevStruct(const YCHAR *path)
2223 yaffs_Object *obj = yaffsfs_FindRoot(path,&rest);
2226 yaffs_Device *dev = obj->myDev;
2229 "nPageWrites.......... %d\n"
2230 "nPageReads........... %d\n"
2231 "nBlockErasures....... %d\n"
2232 "nGCCopies............ %d\n"
2233 "garbageCollections... %d\n"
2234 "passiveGarbageColl'ns %d\n"
2238 dev->nBlockErasures,
2240 dev->garbageCollections,
2241 dev->passiveGarbageCollections