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-rw-r--r--fs/yaffs2/direct/yaffsfs.c1510
1 files changed, 0 insertions, 1510 deletions
diff --git a/fs/yaffs2/direct/yaffsfs.c b/fs/yaffs2/direct/yaffsfs.c
deleted file mode 100644
index f62c952..0000000
--- a/fs/yaffs2/direct/yaffsfs.c
+++ /dev/null
@@ -1,1510 +0,0 @@
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2007 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- */
-
-/* XXX U-BOOT XXX */
-#include <common.h>
-#include <malloc.h>
-
-#include "yaffsfs.h"
-#include "yaffs_guts.h"
-#include "yaffscfg.h"
-#include "yportenv.h"
-
-/* XXX U-BOOT XXX */
-#if 0
-#include <string.h> // for memset
-#endif
-
-#define YAFFSFS_MAX_SYMLINK_DEREFERENCES 5
-
-#ifndef NULL
-#define NULL ((void *)0)
-#endif
-
-
-const char *yaffsfs_c_version="$Id: yaffsfs.c,v 1.18 2007/07/18 19:40:38 charles Exp $";
-
-// configurationList is the list of devices that are supported
-static yaffsfs_DeviceConfiguration *yaffsfs_configurationList;
-
-
-/* Some forward references */
-static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path, int symDepth);
-static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj);
-
-
-// Handle management.
-//
-
-
-unsigned int yaffs_wr_attempts;
-
-typedef struct
-{
- __u8 inUse:1; // this handle is in use
- __u8 readOnly:1; // this handle is read only
- __u8 append:1; // append only
- __u8 exclusive:1; // exclusive
- __u32 position; // current position in file
- yaffs_Object *obj; // the object
-}yaffsfs_Handle;
-
-
-static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
-
-// yaffsfs_InitHandle
-/// Inilitalise handles on start-up.
-//
-static int yaffsfs_InitHandles(void)
-{
- int i;
- for(i = 0; i < YAFFSFS_N_HANDLES; i++)
- {
- yaffsfs_handle[i].inUse = 0;
- yaffsfs_handle[i].obj = NULL;
- }
- return 0;
-}
-
-yaffsfs_Handle *yaffsfs_GetHandlePointer(int h)
-{
- if(h < 0 || h >= YAFFSFS_N_HANDLES)
- {
- return NULL;
- }
-
- return &yaffsfs_handle[h];
-}
-
-yaffs_Object *yaffsfs_GetHandleObject(int handle)
-{
- yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
-
- if(h && h->inUse)
- {
- return h->obj;
- }
-
- return NULL;
-}
-
-
-//yaffsfs_GetHandle
-// Grab a handle (when opening a file)
-//
-
-static int yaffsfs_GetHandle(void)
-{
- int i;
- yaffsfs_Handle *h;
-
- for(i = 0; i < YAFFSFS_N_HANDLES; i++)
- {
- h = yaffsfs_GetHandlePointer(i);
- if(!h)
- {
- // todo bug: should never happen
- }
- if(!h->inUse)
- {
- memset(h,0,sizeof(yaffsfs_Handle));
- h->inUse=1;
- return i;
- }
- }
- return -1;
-}
-
-// yaffs_PutHandle
-// Let go of a handle (when closing a file)
-//
-static int yaffsfs_PutHandle(int handle)
-{
- yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
-
- if(h)
- {
- h->inUse = 0;
- h->obj = NULL;
- }
- return 0;
-}
-
-
-
-// Stuff to search for a directory from a path
-
-
-int yaffsfs_Match(char a, char b)
-{
- // case sensitive
- return (a == b);
-}
-
-// yaffsfs_FindDevice
-// yaffsfs_FindRoot
-// Scan the configuration list to find the root.
-// Curveballs: Should match paths that end in '/' too
-// Curveball2 Might have "/x/ and "/x/y". Need to return the longest match
-static yaffs_Device *yaffsfs_FindDevice(const char *path, char **restOfPath)
-{
- yaffsfs_DeviceConfiguration *cfg = yaffsfs_configurationList;
- const char *leftOver;
- const char *p;
- yaffs_Device *retval = NULL;
- int thisMatchLength;
- int longestMatch = -1;
-
- // Check all configs, choose the one that:
- // 1) Actually matches a prefix (ie /a amd /abc will not match
- // 2) Matches the longest.
- while(cfg && cfg->prefix && cfg->dev)
- {
- leftOver = path;
- p = cfg->prefix;
- thisMatchLength = 0;
-
- while(*p && //unmatched part of prefix
- strcmp(p,"/") && // the rest of the prefix is not / (to catch / at end)
- *leftOver &&
- yaffsfs_Match(*p,*leftOver))
- {
- p++;
- leftOver++;
- thisMatchLength++;
- }
- if((!*p || strcmp(p,"/") == 0) && // end of prefix
- (!*leftOver || *leftOver == '/') && // no more in this path name part
- (thisMatchLength > longestMatch))
- {
- // Matched prefix
- *restOfPath = (char *)leftOver;
- retval = cfg->dev;
- longestMatch = thisMatchLength;
- }
- cfg++;
- }
- return retval;
-}
-
-static yaffs_Object *yaffsfs_FindRoot(const char *path, char **restOfPath)
-{
-
- yaffs_Device *dev;
-
- dev= yaffsfs_FindDevice(path,restOfPath);
- if(dev && dev->isMounted)
- {
- return dev->rootDir;
- }
- return NULL;
-}
-
-static yaffs_Object *yaffsfs_FollowLink(yaffs_Object *obj,int symDepth)
-{
-
- while(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- {
- char *alias = obj->variant.symLinkVariant.alias;
-
- if(*alias == '/')
- {
- // Starts with a /, need to scan from root up
- obj = yaffsfs_FindObject(NULL,alias,symDepth++);
- }
- else
- {
- // Relative to here, so use the parent of the symlink as a start
- obj = yaffsfs_FindObject(obj->parent,alias,symDepth++);
- }
- }
- return obj;
-}
-
-
-// yaffsfs_FindDirectory
-// Parse a path to determine the directory and the name within the directory.
-//
-// eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
-static yaffs_Object *yaffsfs_DoFindDirectory(yaffs_Object *startDir,const char *path,char **name,int symDepth)
-{
- yaffs_Object *dir;
- char *restOfPath;
- char str[YAFFS_MAX_NAME_LENGTH+1];
- int i;
-
- if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES)
- {
- return NULL;
- }
-
- if(startDir)
- {
- dir = startDir;
- restOfPath = (char *)path;
- }
- else
- {
- dir = yaffsfs_FindRoot(path,&restOfPath);
- }
-
- while(dir)
- {
- // parse off /.
- // curve ball: also throw away surplus '/'
- // eg. "/ram/x////ff" gets treated the same as "/ram/x/ff"
- while(*restOfPath == '/')
- {
- restOfPath++; // get rid of '/'
- }
-
- *name = restOfPath;
- i = 0;
-
- while(*restOfPath && *restOfPath != '/')
- {
- if (i < YAFFS_MAX_NAME_LENGTH)
- {
- str[i] = *restOfPath;
- str[i+1] = '\0';
- i++;
- }
- restOfPath++;
- }
-
- if(!*restOfPath)
- {
- // got to the end of the string
- return dir;
- }
- else
- {
- if(strcmp(str,".") == 0)
- {
- // Do nothing
- }
- else if(strcmp(str,"..") == 0)
- {
- dir = dir->parent;
- }
- else
- {
- dir = yaffs_FindObjectByName(dir,str);
-
- while(dir && dir->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- {
-
- dir = yaffsfs_FollowLink(dir,symDepth);
-
- }
-
- if(dir && dir->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- dir = NULL;
- }
- }
- }
- }
- // directory did not exist.
- return NULL;
-}
-
-static yaffs_Object *yaffsfs_FindDirectory(yaffs_Object *relativeDirectory,const char *path,char **name,int symDepth)
-{
- return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth);
-}
-
-// yaffsfs_FindObject turns a path for an existing object into the object
-//
-static yaffs_Object *yaffsfs_FindObject(yaffs_Object *relativeDirectory, const char *path,int symDepth)
-{
- yaffs_Object *dir;
- char *name;
-
- dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth);
-
- if(dir && *name)
- {
- return yaffs_FindObjectByName(dir,name);
- }
-
- return dir;
-}
-
-
-
-int yaffs_open(const char *path, int oflag, int mode)
-{
- yaffs_Object *obj = NULL;
- yaffs_Object *dir = NULL;
- char *name;
- int handle = -1;
- yaffsfs_Handle *h = NULL;
- int alreadyOpen = 0;
- int alreadyExclusive = 0;
- int openDenied = 0;
- int symDepth = 0;
- int errorReported = 0;
-
- int i;
-
-
- // todo sanity check oflag (eg. can't have O_TRUNC without WRONLY or RDWR
-
-
- yaffsfs_Lock();
-
- handle = yaffsfs_GetHandle();
-
- if(handle >= 0)
- {
-
- h = yaffsfs_GetHandlePointer(handle);
-
-
- // try to find the exisiting object
- obj = yaffsfs_FindObject(NULL,path,0);
-
- if(obj && obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- {
-
- obj = yaffsfs_FollowLink(obj,symDepth++);
- }
-
- if(obj)
- {
- // Check if the object is already in use
- alreadyOpen = alreadyExclusive = 0;
-
- for(i = 0; i <= YAFFSFS_N_HANDLES; i++)
- {
-
- if(i != handle &&
- yaffsfs_handle[i].inUse &&
- obj == yaffsfs_handle[i].obj)
- {
- alreadyOpen = 1;
- if(yaffsfs_handle[i].exclusive)
- {
- alreadyExclusive = 1;
- }
- }
- }
-
- if(((oflag & O_EXCL) && alreadyOpen) || alreadyExclusive)
- {
- openDenied = 1;
- }
-
- // Open should fail if O_CREAT and O_EXCL are specified
- if((oflag & O_EXCL) && (oflag & O_CREAT))
- {
- openDenied = 1;
- yaffsfs_SetError(-EEXIST);
- errorReported = 1;
- }
-
- // Check file permissions
- if( (oflag & (O_RDWR | O_WRONLY)) == 0 && // ie O_RDONLY
- !(obj->yst_mode & S_IREAD))
- {
- openDenied = 1;
- }
-
- if( (oflag & O_RDWR) &&
- !(obj->yst_mode & S_IREAD))
- {
- openDenied = 1;
- }
-
- if( (oflag & (O_RDWR | O_WRONLY)) &&
- !(obj->yst_mode & S_IWRITE))
- {
- openDenied = 1;
- }
-
- }
-
- else if((oflag & O_CREAT))
- {
- // Let's see if we can create this file
- dir = yaffsfs_FindDirectory(NULL,path,&name,0);
- if(dir)
- {
- obj = yaffs_MknodFile(dir,name,mode,0,0);
- }
- else
- {
- yaffsfs_SetError(-ENOTDIR);
- }
- }
-
- if(obj && !openDenied)
- {
- h->obj = obj;
- h->inUse = 1;
- h->readOnly = (oflag & (O_WRONLY | O_RDWR)) ? 0 : 1;
- h->append = (oflag & O_APPEND) ? 1 : 0;
- h->exclusive = (oflag & O_EXCL) ? 1 : 0;
- h->position = 0;
-
- obj->inUse++;
- if((oflag & O_TRUNC) && !h->readOnly)
- {
- //todo truncate
- yaffs_ResizeFile(obj,0);
- }
-
- }
- else
- {
- yaffsfs_PutHandle(handle);
- if(!errorReported)
- {
- yaffsfs_SetError(-EACCESS);
- errorReported = 1;
- }
- handle = -1;
- }
-
- }
-
- yaffsfs_Unlock();
-
- return handle;
-}
-
-int yaffs_close(int fd)
-{
- yaffsfs_Handle *h = NULL;
- int retVal = 0;
-
- yaffsfs_Lock();
-
- h = yaffsfs_GetHandlePointer(fd);
-
- if(h && h->inUse)
- {
- // clean up
- yaffs_FlushFile(h->obj,1);
- h->obj->inUse--;
- if(h->obj->inUse <= 0 && h->obj->unlinked)
- {
- yaffs_DeleteFile(h->obj);
- }
- yaffsfs_PutHandle(fd);
- retVal = 0;
- }
- else
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- retVal = -1;
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-}
-
-int yaffs_read(int fd, void *buf, unsigned int nbyte)
-{
- yaffsfs_Handle *h = NULL;
- yaffs_Object *obj = NULL;
- int pos = 0;
- int nRead = -1;
- int maxRead;
-
- yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
-
- if(!h || !obj)
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
- else if( h && obj)
- {
- pos= h->position;
- if(yaffs_GetObjectFileLength(obj) > pos)
- {
- maxRead = yaffs_GetObjectFileLength(obj) - pos;
- }
- else
- {
- maxRead = 0;
- }
-
- if(nbyte > maxRead)
- {
- nbyte = maxRead;
- }
-
-
- if(nbyte > 0)
- {
- nRead = yaffs_ReadDataFromFile(obj,buf,pos,nbyte);
- if(nRead >= 0)
- {
- h->position = pos + nRead;
- }
- else
- {
- //todo error
- }
- }
- else
- {
- nRead = 0;
- }
-
- }
-
- yaffsfs_Unlock();
-
-
- return (nRead >= 0) ? nRead : -1;
-
-}
-
-int yaffs_write(int fd, const void *buf, unsigned int nbyte)
-{
- yaffsfs_Handle *h = NULL;
- yaffs_Object *obj = NULL;
- int pos = 0;
- int nWritten = -1;
- int writeThrough = 0;
-
- yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
-
- if(!h || !obj)
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
- else if( h && obj && h->readOnly)
- {
- // todo error
- }
- else if( h && obj)
- {
- if(h->append)
- {
- pos = yaffs_GetObjectFileLength(obj);
- }
- else
- {
- pos = h->position;
- }
-
- nWritten = yaffs_WriteDataToFile(obj,buf,pos,nbyte,writeThrough);
-
- if(nWritten >= 0)
- {
- h->position = pos + nWritten;
- }
- else
- {
- //todo error
- }
-
- }
-
- yaffsfs_Unlock();
-
-
- return (nWritten >= 0) ? nWritten : -1;
-
-}
-
-int yaffs_truncate(int fd, off_t newSize)
-{
- yaffsfs_Handle *h = NULL;
- yaffs_Object *obj = NULL;
- int result = 0;
-
- yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
-
- if(!h || !obj)
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
- else
- {
- // resize the file
- result = yaffs_ResizeFile(obj,newSize);
- }
- yaffsfs_Unlock();
-
-
- return (result) ? 0 : -1;
-
-}
-
-off_t yaffs_lseek(int fd, off_t offset, int whence)
-{
- yaffsfs_Handle *h = NULL;
- yaffs_Object *obj = NULL;
- int pos = -1;
- int fSize = -1;
-
- yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
-
- if(!h || !obj)
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
- else if(whence == SEEK_SET)
- {
- if(offset >= 0)
- {
- pos = offset;
- }
- }
- else if(whence == SEEK_CUR)
- {
- if( (h->position + offset) >= 0)
- {
- pos = (h->position + offset);
- }
- }
- else if(whence == SEEK_END)
- {
- fSize = yaffs_GetObjectFileLength(obj);
- if(fSize >= 0 && (fSize + offset) >= 0)
- {
- pos = fSize + offset;
- }
- }
-
- if(pos >= 0)
- {
- h->position = pos;
- }
- else
- {
- // todo error
- }
-
-
- yaffsfs_Unlock();
-
- return pos;
-}
-
-
-int yaffsfs_DoUnlink(const char *path,int isDirectory)
-{
- yaffs_Object *dir = NULL;
- yaffs_Object *obj = NULL;
- char *name;
- int result = YAFFS_FAIL;
-
- yaffsfs_Lock();
-
- obj = yaffsfs_FindObject(NULL,path,0);
- dir = yaffsfs_FindDirectory(NULL,path,&name,0);
- if(!dir)
- {
- yaffsfs_SetError(-ENOTDIR);
- }
- else if(!obj)
- {
- yaffsfs_SetError(-ENOENT);
- }
- else if(!isDirectory && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- yaffsfs_SetError(-EISDIR);
- }
- else if(isDirectory && obj->variantType != YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- yaffsfs_SetError(-ENOTDIR);
- }
- else
- {
- result = yaffs_Unlink(dir,name);
-
- if(result == YAFFS_FAIL && isDirectory)
- {
- yaffsfs_SetError(-ENOTEMPTY);
- }
- }
-
- yaffsfs_Unlock();
-
- // todo error
-
- return (result == YAFFS_FAIL) ? -1 : 0;
-}
-int yaffs_rmdir(const char *path)
-{
- return yaffsfs_DoUnlink(path,1);
-}
-
-int yaffs_unlink(const char *path)
-{
- return yaffsfs_DoUnlink(path,0);
-}
-
-int yaffs_rename(const char *oldPath, const char *newPath)
-{
- yaffs_Object *olddir = NULL;
- yaffs_Object *newdir = NULL;
- yaffs_Object *obj = NULL;
- char *oldname;
- char *newname;
- int result= YAFFS_FAIL;
- int renameAllowed = 1;
-
- yaffsfs_Lock();
-
- olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0);
- newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0);
- obj = yaffsfs_FindObject(NULL,oldPath,0);
-
- if(!olddir || !newdir || !obj)
- {
- // bad file
- yaffsfs_SetError(-EBADF);
- renameAllowed = 0;
- }
- else if(olddir->myDev != newdir->myDev)
- {
- // oops must be on same device
- // todo error
- yaffsfs_SetError(-EXDEV);
- renameAllowed = 0;
- }
- else if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- // It is a directory, check that it is not being renamed to
- // being its own decendent.
- // Do this by tracing from the new directory back to the root, checking for obj
-
- yaffs_Object *xx = newdir;
-
- while( renameAllowed && xx)
- {
- if(xx == obj)
- {
- renameAllowed = 0;
- }
- xx = xx->parent;
- }
- if(!renameAllowed) yaffsfs_SetError(-EACCESS);
- }
-
- if(renameAllowed)
- {
- result = yaffs_RenameObject(olddir,oldname,newdir,newname);
- }
-
- yaffsfs_Unlock();
-
- return (result == YAFFS_FAIL) ? -1 : 0;
-}
-
-
-static int yaffsfs_DoStat(yaffs_Object *obj,struct yaffs_stat *buf)
-{
- int retVal = -1;
-
- if(obj)
- {
- obj = yaffs_GetEquivalentObject(obj);
- }
-
- if(obj && buf)
- {
- buf->st_dev = (int)obj->myDev->genericDevice;
- buf->st_ino = obj->objectId;
- buf->st_mode = obj->yst_mode & ~S_IFMT; // clear out file type bits
-
- if(obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
- {
- buf->st_mode |= S_IFDIR;
- }
- else if(obj->variantType == YAFFS_OBJECT_TYPE_SYMLINK)
- {
- buf->st_mode |= S_IFLNK;
- }
- else if(obj->variantType == YAFFS_OBJECT_TYPE_FILE)
- {
- buf->st_mode |= S_IFREG;
- }
-
- buf->st_nlink = yaffs_GetObjectLinkCount(obj);
- buf->st_uid = 0;
- buf->st_gid = 0;;
- buf->st_rdev = obj->yst_rdev;
- buf->st_size = yaffs_GetObjectFileLength(obj);
- buf->st_blksize = obj->myDev->nDataBytesPerChunk;
- buf->st_blocks = (buf->st_size + buf->st_blksize -1)/buf->st_blksize;
- buf->yst_atime = obj->yst_atime;
- buf->yst_ctime = obj->yst_ctime;
- buf->yst_mtime = obj->yst_mtime;
- retVal = 0;
- }
- return retVal;
-}
-
-static int yaffsfs_DoStatOrLStat(const char *path, struct yaffs_stat *buf,int doLStat)
-{
- yaffs_Object *obj;
-
- int retVal = -1;
-
- yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0);
-
- if(!doLStat && obj)
- {
- obj = yaffsfs_FollowLink(obj,0);
- }
-
- if(obj)
- {
- retVal = yaffsfs_DoStat(obj,buf);
- }
- else
- {
- // todo error not found
- yaffsfs_SetError(-ENOENT);
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-
-}
-
-int yaffs_stat(const char *path, struct yaffs_stat *buf)
-{
- return yaffsfs_DoStatOrLStat(path,buf,0);
-}
-
-int yaffs_lstat(const char *path, struct yaffs_stat *buf)
-{
- return yaffsfs_DoStatOrLStat(path,buf,1);
-}
-
-int yaffs_fstat(int fd, struct yaffs_stat *buf)
-{
- yaffs_Object *obj;
-
- int retVal = -1;
-
- yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
-
- if(obj)
- {
- retVal = yaffsfs_DoStat(obj,buf);
- }
- else
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-}
-
-static int yaffsfs_DoChMod(yaffs_Object *obj,mode_t mode)
-{
- int result = YAFFS_FAIL;
-
- if(obj)
- {
- obj = yaffs_GetEquivalentObject(obj);
- }
-
- if(obj)
- {
- obj->yst_mode = mode;
- obj->dirty = 1;
- result = yaffs_FlushFile(obj,0);
- }
-
- return result == YAFFS_OK ? 0 : -1;
-}
-
-
-int yaffs_chmod(const char *path, mode_t mode)
-{
- yaffs_Object *obj;
-
- int retVal = -1;
-
- yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0);
-
- if(obj)
- {
- retVal = yaffsfs_DoChMod(obj,mode);
- }
- else
- {
- // todo error not found
- yaffsfs_SetError(-ENOENT);
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-
-}
-
-
-int yaffs_fchmod(int fd, mode_t mode)
-{
- yaffs_Object *obj;
-
- int retVal = -1;
-
- yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
-
- if(obj)
- {
- retVal = yaffsfs_DoChMod(obj,mode);
- }
- else
- {
- // bad handle
- yaffsfs_SetError(-EBADF);
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-}
-
-
-int yaffs_mkdir(const char *path, mode_t mode)
-{
- yaffs_Object *parent = NULL;
- yaffs_Object *dir = NULL;
- char *name;
- int retVal= -1;
-
- yaffsfs_Lock();
- parent = yaffsfs_FindDirectory(NULL,path,&name,0);
- if(parent)
- dir = yaffs_MknodDirectory(parent,name,mode,0,0);
- if(dir)
- {
- retVal = 0;
- }
- else
- {
- yaffsfs_SetError(-ENOSPC); // just assume no space for now
- retVal = -1;
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-}
-
-int yaffs_mount(const char *path)
-{
- int retVal=-1;
- int result=YAFFS_FAIL;
- yaffs_Device *dev=NULL;
- char *dummy;
-
- T(YAFFS_TRACE_ALWAYS,("yaffs: Mounting %s\n",path));
-
- yaffsfs_Lock();
- dev = yaffsfs_FindDevice(path,&dummy);
- if(dev)
- {
- if(!dev->isMounted)
- {
- result = yaffs_GutsInitialise(dev);
- if(result == YAFFS_FAIL)
- {
- // todo error - mount failed
- yaffsfs_SetError(-ENOMEM);
- }
- retVal = result ? 0 : -1;
-
- }
- else
- {
- //todo error - already mounted.
- yaffsfs_SetError(-EBUSY);
- }
- }
- else
- {
- // todo error - no device
- yaffsfs_SetError(-ENODEV);
- }
- yaffsfs_Unlock();
- return retVal;
-
-}
-
-int yaffs_unmount(const char *path)
-{
- int retVal=-1;
- yaffs_Device *dev=NULL;
- char *dummy;
-
- yaffsfs_Lock();
- dev = yaffsfs_FindDevice(path,&dummy);
- if(dev)
- {
- if(dev->isMounted)
- {
- int i;
- int inUse;
-
- yaffs_FlushEntireDeviceCache(dev);
- yaffs_CheckpointSave(dev);
-
- for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++)
- {
- if(yaffsfs_handle[i].inUse && yaffsfs_handle[i].obj->myDev == dev)
- {
- inUse = 1; // the device is in use, can't unmount
- }
- }
-
- if(!inUse)
- {
- yaffs_Deinitialise(dev);
-
- retVal = 0;
- }
- else
- {
- // todo error can't unmount as files are open
- yaffsfs_SetError(-EBUSY);
- }
-
- }
- else
- {
- //todo error - not mounted.
- yaffsfs_SetError(-EINVAL);
-
- }
- }
- else
- {
- // todo error - no device
- yaffsfs_SetError(-ENODEV);
- }
- yaffsfs_Unlock();
- return retVal;
-
-}
-
-loff_t yaffs_freespace(const char *path)
-{
- loff_t retVal=-1;
- yaffs_Device *dev=NULL;
- char *dummy;
-
- yaffsfs_Lock();
- dev = yaffsfs_FindDevice(path,&dummy);
- if(dev && dev->isMounted)
- {
- retVal = yaffs_GetNumberOfFreeChunks(dev);
- retVal *= dev->nDataBytesPerChunk;
-
- }
- else
- {
- yaffsfs_SetError(-EINVAL);
- }
-
- yaffsfs_Unlock();
- return retVal;
-}
-
-
-
-void yaffs_initialise(yaffsfs_DeviceConfiguration *cfgList)
-{
-
- yaffsfs_DeviceConfiguration *cfg;
-
- yaffsfs_configurationList = cfgList;
-
- yaffsfs_InitHandles();
-
- cfg = yaffsfs_configurationList;
-
- while(cfg && cfg->prefix && cfg->dev)
- {
- cfg->dev->isMounted = 0;
- cfg->dev->removeObjectCallback = yaffsfs_RemoveObjectCallback;
- cfg++;
- }
-}
-
-
-//
-// Directory search stuff.
-
-//
-// Directory search context
-//
-// NB this is an opaque structure.
-
-
-typedef struct
-{
- __u32 magic;
- yaffs_dirent de; /* directory entry being used by this dsc */
- char name[NAME_MAX+1]; /* name of directory being searched */
- yaffs_Object *dirObj; /* ptr to directory being searched */
- yaffs_Object *nextReturn; /* obj to be returned by next readddir */
- int offset;
- struct list_head others;
-} yaffsfs_DirectorySearchContext;
-
-
-
-static struct list_head search_contexts;
-
-
-static void yaffsfs_SetDirRewound(yaffsfs_DirectorySearchContext *dsc)
-{
- if(dsc &&
- dsc->dirObj &&
- dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
-
- dsc->offset = 0;
-
- if( list_empty(&dsc->dirObj->variant.directoryVariant.children)){
- dsc->nextReturn = NULL;
- } else {
- dsc->nextReturn = list_entry(dsc->dirObj->variant.directoryVariant.children.next,
- yaffs_Object,siblings);
- }
- } else {
- /* Hey someone isn't playing nice! */
- }
-}
-
-static void yaffsfs_DirAdvance(yaffsfs_DirectorySearchContext *dsc)
-{
- if(dsc &&
- dsc->dirObj &&
- dsc->dirObj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY){
-
- if( dsc->nextReturn == NULL ||
- list_empty(&dsc->dirObj->variant.directoryVariant.children)){
- dsc->nextReturn = NULL;
- } else {
- struct list_head *next = dsc->nextReturn->siblings.next;
-
- if( next == &dsc->dirObj->variant.directoryVariant.children)
- dsc->nextReturn = NULL; /* end of list */
- else
- dsc->nextReturn = list_entry(next,yaffs_Object,siblings);
- }
- } else {
- /* Hey someone isn't playing nice! */
- }
-}
-
-static void yaffsfs_RemoveObjectCallback(yaffs_Object *obj)
-{
-
- struct list_head *i;
- yaffsfs_DirectorySearchContext *dsc;
-
- /* if search contexts not initilised then skip */
- if(!search_contexts.next)
- return;
-
- /* Iteratethrough the directory search contexts.
- * If any are the one being removed, then advance the dsc to
- * the next one to prevent a hanging ptr.
- */
- list_for_each(i, &search_contexts) {
- if (i) {
- dsc = list_entry(i, yaffsfs_DirectorySearchContext,others);
- if(dsc->nextReturn == obj)
- yaffsfs_DirAdvance(dsc);
- }
- }
-
-}
-
-yaffs_DIR *yaffs_opendir(const char *dirname)
-{
- yaffs_DIR *dir = NULL;
- yaffs_Object *obj = NULL;
- yaffsfs_DirectorySearchContext *dsc = NULL;
-
- yaffsfs_Lock();
-
- obj = yaffsfs_FindObject(NULL,dirname,0);
-
- if(obj && obj->variantType == YAFFS_OBJECT_TYPE_DIRECTORY)
- {
-
- dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));
- dir = (yaffs_DIR *)dsc;
- if(dsc)
- {
- memset(dsc,0,sizeof(yaffsfs_DirectorySearchContext));
- dsc->magic = YAFFS_MAGIC;
- dsc->dirObj = obj;
- strncpy(dsc->name,dirname,NAME_MAX);
- INIT_LIST_HEAD(&dsc->others);
-
- if(!search_contexts.next)
- INIT_LIST_HEAD(&search_contexts);
-
- list_add(&dsc->others,&search_contexts);
- yaffsfs_SetDirRewound(dsc); }
-
- }
-
- yaffsfs_Unlock();
-
- return dir;
-}
-
-struct yaffs_dirent *yaffs_readdir(yaffs_DIR *dirp)
-{
- yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
- struct yaffs_dirent *retVal = NULL;
-
- yaffsfs_Lock();
-
- if(dsc && dsc->magic == YAFFS_MAGIC){
- yaffsfs_SetError(0);
- if(dsc->nextReturn){
- dsc->de.d_ino = yaffs_GetEquivalentObject(dsc->nextReturn)->objectId;
- dsc->de.d_dont_use = (unsigned)dsc->nextReturn;
- dsc->de.d_off = dsc->offset++;
- yaffs_GetObjectName(dsc->nextReturn,dsc->de.d_name,NAME_MAX);
- if(strlen(dsc->de.d_name) == 0)
- {
- // this should not happen!
- strcpy(dsc->de.d_name,"zz");
- }
- dsc->de.d_reclen = sizeof(struct yaffs_dirent);
- retVal = &dsc->de;
- yaffsfs_DirAdvance(dsc);
- } else
- retVal = NULL;
- }
- else
- {
- yaffsfs_SetError(-EBADF);
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-
-}
-
-
-void yaffs_rewinddir(yaffs_DIR *dirp)
-{
- yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
-
- yaffsfs_Lock();
-
- yaffsfs_SetDirRewound(dsc);
-
- yaffsfs_Unlock();
-}
-
-
-int yaffs_closedir(yaffs_DIR *dirp)
-{
- yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
-
- yaffsfs_Lock();
- dsc->magic = 0;
- list_del(&dsc->others); /* unhook from list */
- YFREE(dsc);
- yaffsfs_Unlock();
- return 0;
-}
-
-// end of directory stuff
-
-
-int yaffs_symlink(const char *oldpath, const char *newpath)
-{
- yaffs_Object *parent = NULL;
- yaffs_Object *obj;
- char *name;
- int retVal= -1;
- int mode = 0; // ignore for now
-
- yaffsfs_Lock();
- parent = yaffsfs_FindDirectory(NULL,newpath,&name,0);
- obj = yaffs_MknodSymLink(parent,name,mode,0,0,oldpath);
- if(obj)
- {
- retVal = 0;
- }
- else
- {
- yaffsfs_SetError(-ENOSPC); // just assume no space for now
- retVal = -1;
- }
-
- yaffsfs_Unlock();
-
- return retVal;
-
-}
-
-int yaffs_readlink(const char *path, char *buf, int bufsiz)
-{
- yaffs_Object *obj = NULL;
- int retVal;
-
-
- yaffsfs_Lock();
-
- obj = yaffsfs_FindObject(NULL,path,0);
-
- if(!obj)
- {
- yaffsfs_SetError(-ENOENT);
- retVal = -1;
- }
- else if(obj->variantType != YAFFS_OBJECT_TYPE_SYMLINK)
- {
- yaffsfs_SetError(-EINVAL);
- retVal = -1;
- }
- else
- {
- char *alias = obj->variant.symLinkVariant.alias;
- memset(buf,0,bufsiz);
- strncpy(buf,alias,bufsiz - 1);
- retVal = 0;
- }
- yaffsfs_Unlock();
- return retVal;
-}
-
-int yaffs_link(const char *oldpath, const char *newpath)
-{
- // Creates a link called newpath to existing oldpath
- yaffs_Object *obj = NULL;
- yaffs_Object *target = NULL;
- int retVal = 0;
-
-
- yaffsfs_Lock();
-
- obj = yaffsfs_FindObject(NULL,oldpath,0);
- target = yaffsfs_FindObject(NULL,newpath,0);
-
- if(!obj)
- {
- yaffsfs_SetError(-ENOENT);
- retVal = -1;
- }
- else if(target)
- {
- yaffsfs_SetError(-EEXIST);
- retVal = -1;
- }
- else
- {
- yaffs_Object *newdir = NULL;
- yaffs_Object *link = NULL;
-
- char *newname;
-
- newdir = yaffsfs_FindDirectory(NULL,newpath,&newname,0);
-
- if(!newdir)
- {
- yaffsfs_SetError(-ENOTDIR);
- retVal = -1;
- }
- else if(newdir->myDev != obj->myDev)
- {
- yaffsfs_SetError(-EXDEV);
- retVal = -1;
- }
- if(newdir && strlen(newname) > 0)
- {
- link = yaffs_Link(newdir,newname,obj);
- if(link)
- retVal = 0;
- else
- {
- yaffsfs_SetError(-ENOSPC);
- retVal = -1;
- }
-
- }
- }
- yaffsfs_Unlock();
-
- return retVal;
-}
-
-int yaffs_mknod(const char *pathname, mode_t mode, dev_t dev);
-
-int yaffs_DumpDevStruct(const char *path)
-{
- char *rest;
-
- yaffs_Object *obj = yaffsfs_FindRoot(path,&rest);
-
- if(obj)
- {
- yaffs_Device *dev = obj->myDev;
-
- printf("\n"
- "nPageWrites.......... %d\n"
- "nPageReads........... %d\n"
- "nBlockErasures....... %d\n"
- "nGCCopies............ %d\n"
- "garbageCollections... %d\n"
- "passiveGarbageColl'ns %d\n"
- "\n",
- dev->nPageWrites,
- dev->nPageReads,
- dev->nBlockErasures,
- dev->nGCCopies,
- dev->garbageCollections,
- dev->passiveGarbageCollections
- );
-
- }
- return 0;
-}
generated by cgit v0.10.2 at 2024-08-06 15:07:02 (GMT)