static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
const YCHAR *path,
int symDepth, int getEquiv,
- struct yaffs_obj **dirOut);
+ struct yaffs_obj **dirOut,
+ int *notDir, int *loop);
static void yaffsfs_RemoveObjectCallback(struct yaffs_obj *obj);
/*
* Handle management.
* There are open inodes in yaffsfs_Inode.
- * There are open handles in yaffsfs_Handle.
+ * There are open file descriptors in yaffsfs_FileDes.
+ * There are open handles in yaffsfs_FileDes.
*
* Things are structured this way to be like the Linux VFS model
* so that interactions with the yaffs guts calls are similar.
* That means more common code paths and less special code.
* That means better testing etc.
+ *
+ * We have 3 layers because:
+ * A handle is different than an fd because you can use dup()
+ * to create a new handle that accesses the *same* fd. The two
+ * handles will use the same offset (part of the fd). We only close
+ * down the fd when there are no more handles accessing it.
+ *
+ * More than one fd can currently access one file, but each fd
+ * has its own permsiions and offset.
*/
typedef struct {
u8 shareRead:1;
u8 shareWrite:1;
int inodeId:12; /* Index to corresponding yaffsfs_Inode */
- int useCount:10; /* Use count for this handle */
+ int handleCount:10; /* Number of handles for this fd */
u32 position; /* current position in file */
-}yaffsfs_Handle;
+}yaffsfs_FileDes;
+
+typedef struct {
+ short int fdId;
+ short int useCount;
+} yaffsfs_Handle;
static yaffsfs_Inode yaffsfs_inode[YAFFSFS_N_HANDLES];
+static yaffsfs_FileDes yaffsfs_fd[YAFFSFS_N_HANDLES];
static yaffsfs_Handle yaffsfs_handle[YAFFSFS_N_HANDLES];
+
static int yaffsfs_handlesInitialised;
return;
memset(yaffsfs_inode,0,sizeof(yaffsfs_inode));
+ memset(yaffsfs_fd,0,sizeof(yaffsfs_fd));
memset(yaffsfs_handle,0,sizeof(yaffsfs_handle));
+
for(i = 0; i < YAFFSFS_N_HANDLES; i++)
- yaffsfs_handle[i].inodeId = -1;
+ yaffsfs_fd[i].inodeId = -1;
+ for(i = 0; i < YAFFSFS_N_HANDLES; i++)
+ yaffsfs_handle[i].fdId = -1;
}
-yaffsfs_Handle *yaffsfs_GetHandlePointer(int h)
+static yaffsfs_Handle *yaffsfs_HandleToPointer(int h)
{
- if(h < 0 || h >= YAFFSFS_N_HANDLES)
- return NULL;
+ if(h >= 0 && h <= YAFFSFS_N_HANDLES)
+ return &yaffsfs_handle[h];
+ return NULL;
+}
+
+static yaffsfs_FileDes *yaffsfs_HandleToFileDes(int handle)
+{
+ yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
- return &yaffsfs_handle[h];
+ if(h && h->useCount > 0 && h->fdId >= 0 && h->fdId < YAFFSFS_N_HANDLES)
+ return &yaffsfs_fd[h->fdId];
+
+ return NULL;
}
-yaffsfs_Inode *yaffsfs_GetInodePointer(int handle)
+static yaffsfs_Inode *yaffsfs_HandleToInode(int handle)
{
- yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
+ yaffsfs_FileDes *fd = yaffsfs_HandleToFileDes(handle);
- if(h && h->useCount > 0 && h->inodeId >= 0 && h->inodeId < YAFFSFS_N_HANDLES)
- return &yaffsfs_inode[h->inodeId];
+ if(fd && fd->handleCount > 0 &&
+ fd->inodeId >= 0 && fd->inodeId < YAFFSFS_N_HANDLES)
+ return &yaffsfs_inode[fd->inodeId];
return NULL;
}
-struct yaffs_obj *yaffsfs_GetHandleObject(int handle)
+static struct yaffs_obj *yaffsfs_HandleToObject(int handle)
{
- yaffsfs_Inode *in = yaffsfs_GetInodePointer(handle);
+ yaffsfs_Inode *in = yaffsfs_HandleToInode(handle);
if(in)
return in->iObj;
if(inodeId >= 0 && inodeId < YAFFSFS_N_HANDLES){
yaffsfs_Inode *in = & yaffsfs_inode[inodeId];
in->count--;
- if(in->count <= 0)
+ if(in->count <= 0){
yaffsfs_ReleaseInode(in);
+ in->count = 0;
+ }
}
}
-/*
- * yaffsfs_GetHandle
- * Grab a handle (when opening a file)
- */
-static int yaffsfs_GetNewHandle(void)
+static int yaffsfs_NewHandle(yaffsfs_Handle **hptr)
{
int i;
yaffsfs_Handle *h;
for(i = 0; i < YAFFSFS_N_HANDLES; i++){
- h = yaffsfs_GetHandlePointer(i);
- if(!h){
- /* todo bug: should never happen */
- }
+ h = &yaffsfs_handle[i];
if(h->useCount < 1){
memset(h,0,sizeof(yaffsfs_Handle));
- h->inodeId=-1;
+ h->fdId=-1;
h->useCount=1;
+ if(hptr)
+ *hptr = h;
return i;
}
}
return -1;
}
+static int yaffsfs_NewHandleAndFileDes(void)
+{
+ int i;
+ yaffsfs_FileDes *fd;
+ yaffsfs_Handle *h = NULL;
+ int handle = yaffsfs_NewHandle(&h);
+
+ if(handle < 0)
+ return -1;
+
+ for(i = 0; i < YAFFSFS_N_HANDLES; i++){
+ fd = &yaffsfs_fd[i];
+ if(fd->handleCount < 1){
+ memset(fd,0,sizeof(yaffsfs_FileDes));
+ fd->inodeId=-1;
+ fd->handleCount=1;
+ h->fdId = i;
+ return handle;
+ }
+ }
+
+ /* Dump the handle because we could not get a fd */
+ h->useCount = 0;
+ return -1;
+}
+
/*
* yaffs_get_handle
* Increase use of handle when reading/writing a file
+ * Also gets the file descriptor.
*/
+
static int yaffsfs_GetHandle(int handle)
{
- yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
+ yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
if(h && h->useCount > 0){
h->useCount++;
+ return 0;
}
- return 0;
+ return -1;
}
/*
* Let go of a handle when closing a file or aborting an open or
* ending a read or write.
*/
+
+static int yaffsfs_PutFileDes(int fdId)
+{
+ yaffsfs_FileDes *fd;
+
+ if(fdId >= 0 && fdId < YAFFSFS_N_HANDLES){
+ fd = &yaffsfs_fd[fdId];
+ fd->handleCount--;
+ if(fd->handleCount < 1){
+ if(fd->inodeId >= 0){
+ yaffsfs_PutInode(fd->inodeId);
+ fd->inodeId = -1;
+ }
+ }
+ }
+ return 0;
+}
static int yaffsfs_PutHandle(int handle)
{
- yaffsfs_Handle *h = yaffsfs_GetHandlePointer(handle);
+ yaffsfs_Handle *h = yaffsfs_HandleToPointer(handle);
if(h && h->useCount > 0){
h->useCount--;
if(h->useCount < 1){
- if(h->inodeId >= 0){
- yaffsfs_PutInode(h->inodeId);
- h->inodeId = -1;
- }
+ yaffsfs_PutFileDes(h->fdId);
+ h->fdId = -1;
}
}
+
return 0;
}
-static void yaffsfs_PutDeviceHandles(struct yaffs_dev *dev)
+static void yaffsfs_BreakDeviceHandles(struct yaffs_dev *dev)
{
- yaffsfs_Handle *yh;
+ yaffsfs_FileDes *fd;
+ yaffsfs_Handle *h;
+ struct yaffs_obj *obj;
int i;
for(i = 0; i < YAFFSFS_N_HANDLES; i++){
- yh = & yaffsfs_handle[i];
- if(yh->useCount>0 &&
- yaffsfs_inode[yh->inodeId].iObj->my_dev == dev)
- yaffsfs_PutHandle(i);
+ h = yaffsfs_HandleToPointer(i);
+ fd = yaffsfs_HandleToFileDes(i);
+ obj = yaffsfs_HandleToObject(i);
+ if(h && h->useCount > 0){
+ h->useCount = 0;
+ h->fdId = 0;
+ }
+ if(fd && fd->handleCount>0 && obj && obj->my_dev == dev){
+
+ fd->handleCount = 0;
+ yaffsfs_PutInode(fd->inodeId);
+ fd->inodeId = -1;
+ }
}
}
return retVal;
}
+
+static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
+{
+ YCHAR *alt_path = NULL;
+ int path_length;
+ int i;
+
+ /*
+ * We don't have a definition for max path length.
+ * We will use 3 * max name length instead.
+ */
+ *ret_path = NULL;
+ path_length = strnlen(path,(YAFFS_MAX_NAME_LENGTH+1)*3 +1);
+
+ /* If the last character is a path divider, then we need to
+ * trim it back so that the name look-up works properly.
+ * eg. /foo/new_dir/ -> /foo/newdir
+ * Curveball: Need to handle multiple path dividers:
+ * eg. /foof/sdfse///// -> /foo/sdfse
+ */
+ if(path_length > 0 &&
+ yaffsfs_IsPathDivider(path[path_length-1])){
+ alt_path = YMALLOC(path_length + 1);
+ if(!alt_path)
+ return -1;
+ strcpy(alt_path, path);
+ for(i = path_length-1;
+ i >= 0 && yaffsfs_IsPathDivider(alt_path[i]);
+ i--)
+ alt_path[i] = (YCHAR) 0;
+ }
+ *ret_path = alt_path;
+ return 0;
+}
+
+
LIST_HEAD(yaffsfs_deviceList);
/*
return NULL;
}
-static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,int symDepth)
+static struct yaffs_obj *yaffsfs_FollowLink(struct yaffs_obj *obj,
+ int symDepth, int *loop)
{
if(obj)
if(yaffsfs_IsPathDivider(*alias))
/* Starts with a /, need to scan from root up */
- obj = yaffsfs_FindObject(NULL,alias,symDepth++,1,NULL);
+ obj = yaffsfs_FindObject(NULL,alias,symDepth++,
+ 1,NULL,NULL,loop);
else
/* Relative to here, so use the parent of the symlink as a start */
- obj = yaffsfs_FindObject(obj->parent,alias,symDepth++,1,NULL);
+ obj = yaffsfs_FindObject(obj->parent,alias,symDepth++,
+ 1,NULL,NULL,loop);
}
return obj;
}
* eg. "/data/xx/ff" --> puts name="ff" and returns the directory "/data/xx"
*/
static struct yaffs_obj *yaffsfs_DoFindDirectory(struct yaffs_obj *startDir,
- const YCHAR *path, YCHAR **name, int symDepth)
+ const YCHAR *path, YCHAR **name, int symDepth,
+ int *notDir,int *loop)
{
struct yaffs_obj *dir;
YCHAR *restOfPath;
YCHAR str[YAFFS_MAX_NAME_LENGTH+1];
int i;
- if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES)
+ if(symDepth > YAFFSFS_MAX_SYMLINK_DEREFERENCES){
+ if(loop)
+ *loop = 1;
return NULL;
+ }
if(startDir){
dir = startDir;
else
dir = yaffsfs_FindRoot(path,&restOfPath);
+
while(dir){
/*
* parse off /.
else{
dir = yaffs_find_by_name(dir,str);
- dir = yaffsfs_FollowLink(dir,symDepth);
+ dir = yaffsfs_FollowLink(dir,symDepth,loop);
- if(dir && dir->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ if(dir && dir->variant_type !=
+ YAFFS_OBJECT_TYPE_DIRECTORY){
+ if(notDir)
+ *notDir = 1;
dir = NULL;
+ }
+
}
}
}
return NULL;
}
-static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relativeDirectory,
- const YCHAR *path,YCHAR **name,int symDepth)
+static struct yaffs_obj *yaffsfs_FindDirectory(struct yaffs_obj *relDir,
+ const YCHAR *path,
+ YCHAR **name,
+ int symDepth,
+ int *notDir,
+ int *loop)
{
- return yaffsfs_DoFindDirectory(relativeDirectory,path,name,symDepth);
+ return yaffsfs_DoFindDirectory(relDir,path,name,symDepth,notDir,loop);
}
/*
* yaffsfs_FindObject turns a path for an existing object into the object
*/
-static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relativeDirectory,
+static struct yaffs_obj *yaffsfs_FindObject(struct yaffs_obj *relDir,
const YCHAR *path,int symDepth, int getEquiv,
- struct yaffs_obj **dirOut)
+ struct yaffs_obj **dirOut, int *notDir,int *loop)
{
struct yaffs_obj *dir;
struct yaffs_obj *obj;
YCHAR *name;
- dir = yaffsfs_FindDirectory(relativeDirectory,path,&name,symDepth);
+ dir = yaffsfs_FindDirectory(relDir,path,&name,symDepth,notDir,loop);
if(dirOut)
*dirOut = dir;
}
-int yaffs_dup(int fd)
+/*************************************************************************
+ * Start of yaffsfs visible functions.
+ *************************************************************************/
+
+int yaffs_dup(int handle)
{
- int newHandle = -1;
- yaffsfs_Handle *oldPtr = NULL;
- yaffsfs_Handle *newPtr = NULL;
+ int newHandleNumber = -1;
+ yaffsfs_FileDes *existingFD = NULL;
+ yaffsfs_Handle *existingHandle = NULL;
+ yaffsfs_Handle *newHandle = NULL;
yaffsfs_Lock();
-
- oldPtr = yaffsfs_GetHandlePointer(fd);
- if(oldPtr && oldPtr->useCount > 0)
- newHandle = yaffsfs_GetNewHandle();
- if(newHandle >= 0)
- newPtr = yaffsfs_GetHandlePointer(newHandle);
-
- if(newPtr){
- *newPtr = *oldPtr;
- return newHandle;
+ existingHandle = yaffsfs_HandleToPointer(handle);
+ existingFD = yaffsfs_HandleToFileDes(handle);
+ if(existingFD)
+ newHandleNumber = yaffsfs_NewHandle(&newHandle);
+ if(newHandle){
+ newHandle->fdId = existingHandle->fdId;
+ existingFD->handleCount++;
}
- if(!oldPtr)
+ yaffsfs_Unlock();
+
+ if(!existingFD)
yaffsfs_SetError(-EBADF);
- else
+ else if (!newHandle)
yaffsfs_SetError(-ENOMEM);
- return -1;
+ return newHandleNumber;
}
struct yaffs_obj *dir = NULL;
YCHAR *name;
int handle = -1;
- yaffsfs_Handle *yh = NULL;
+ yaffsfs_FileDes *fd = NULL;
int openDenied = 0;
int symDepth = 0;
int errorReported = 0;
u8 alreadyWriting;
u8 readRequested;
u8 writeRequested;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path) {
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- handle = yaffsfs_GetNewHandle();
+ handle = yaffsfs_NewHandleAndFileDes();
if(handle < 0){
yaffsfs_SetError(-ENFILE);
errorReported = 1;
} else {
- yh = yaffsfs_GetHandlePointer(handle);
+ fd = yaffsfs_HandleToFileDes(handle);
/* try to find the exisiting object */
- obj = yaffsfs_FindObject(NULL,path,0,1,NULL);
+ obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
- obj = yaffsfs_FollowLink(obj,symDepth++);
+ obj = yaffsfs_FollowLink(obj,symDepth++,&loop);
if(obj &&
obj->variant_type != YAFFS_OBJECT_TYPE_FILE &&
if( writeRequested && !(obj->yst_mode & S_IWRITE))
openDenied = 1;
+ if( !errorReported && writeRequested &&
+ obj->my_dev->read_only){
+ openDenied = 1;
+ yaffsfs_SetError(-EROFS);
+ errorReported = 1;
+ }
+
if(openDenied && !errorReported ) {
/* Error if the file exists but permissions are refused. */
yaffsfs_SetError(-EACCES);
/* Check sharing of an existing object. */
if(!openDenied){
- yaffsfs_Handle *hx;
+ yaffsfs_FileDes *fdx;
int i;
+
sharedReadAllowed = 1;
sharedWriteAllowed = 1;
alreadyReading = 0;
alreadyWriting = 0;
for( i = 0; i < YAFFSFS_N_HANDLES; i++){
- hx = &yaffsfs_handle[i];
- if(hx->useCount > 0 &&
- hx->inodeId >= 0 &&
- yaffsfs_inode[hx->inodeId].iObj == obj){
- if(!hx->shareRead)
+ fdx = &yaffsfs_fd[i];
+ if(fdx->handleCount > 0 &&
+ fdx->inodeId >= 0 &&
+ yaffsfs_inode[fdx->inodeId].iObj == obj){
+ if(!fdx->shareRead)
sharedReadAllowed = 0;
- if(!hx->shareWrite)
+ if(!fdx->shareWrite)
sharedWriteAllowed = 0;
- if(hx->reading)
+ if(fdx->reading)
alreadyReading = 1;
- if(hx->writing)
+ if(fdx->writing)
alreadyWriting = 1;
}
}
* the directory exists. If not, error.
*/
if(!obj && !errorReported){
- dir = yaffsfs_FindDirectory(NULL,path,&name,0);
- if(!dir){
+ dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
+ if(!dir && notDir){
yaffsfs_SetError(-ENOTDIR);
errorReported = 1;
+ } else if(loop){
+ yaffsfs_SetError(-ELOOP);
+ errorReported = 1;
+ } else if(!dir){
+ yaffsfs_SetError(-ENOENT);
+ errorReported = 1;
}
}
if(!obj && dir && !errorReported && (oflag & O_CREAT)) {
/* Let's see if we can create this file if it does not exist. */
if(dir->my_dev->read_only){
- yaffsfs_SetError(-EINVAL);
+ yaffsfs_SetError(-EROFS);
errorReported = 1;
} else
obj = yaffs_create_file(dir,name,mode,0,0);
*/
}
- yh->inodeId = inodeId;
- yh->reading = readRequested;
- yh->writing = writeRequested;
- yh->append = (oflag & O_APPEND) ? 1 : 0;
- yh->position = 0;
- yh->shareRead = shareRead;
- yh->shareWrite = shareWrite;
+ fd->inodeId = inodeId;
+ fd->reading = readRequested;
+ fd->writing = writeRequested;
+ fd->append = (oflag & O_APPEND) ? 1 : 0;
+ fd->position = 0;
+ fd->shareRead = shareRead;
+ fd->shareWrite = shareWrite;
/* Hook inode to object */
obj->my_inode = (void*) &yaffsfs_inode[inodeId];
- if((oflag & O_TRUNC) && yh->writing)
+ if((oflag & O_TRUNC) && fd->writing)
yaffs_resize_file(obj,0);
} else {
yaffsfs_PutHandle(handle);
int yaffs_open(const YCHAR *path, int oflag, int mode)
{
- return yaffs_open_sharing(path, oflag, mode, YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
+ return yaffs_open_sharing(path, oflag, mode,
+ YAFFS_SHARE_READ | YAFFS_SHARE_WRITE);
}
-int yaffs_Dofsync(int fd,int datasync)
+int yaffs_Dofsync(int handle,int datasync)
{
- yaffsfs_Handle *h = NULL;
- int retVal = 0;
+ int retVal = -1;
+ struct yaffs_obj *obj;
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
+ obj = yaffsfs_HandleToObject(handle);
- if(h && h->useCount > 0)
- /* flush the file */
- yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,datasync);
- else {
- /* bad handle */
+ if(!obj)
yaffsfs_SetError(-EBADF);
- retVal = -1;
+ else if(obj->my_dev->read_only)
+ yaffsfs_SetError(-EROFS);
+ else {
+ yaffs_flush_file(obj,1,datasync);
+ retVal = 0;
}
yaffsfs_Unlock();
return retVal;
}
-int yaffs_fsync(int fd)
+int yaffs_fsync(int handle)
{
- return yaffs_Dofsync(fd,0);
+ return yaffs_Dofsync(handle,0);
}
-int yaffs_flush(int fd)
+int yaffs_flush(int handle)
{
- return yaffs_fsync(fd);
+ return yaffs_fsync(handle);
}
-int yaffs_fdatasync(int fd)
+int yaffs_fdatasync(int handle)
{
- return yaffs_Dofsync(fd,1);
+ return yaffs_Dofsync(handle,1);
}
-int yaffs_close(int fd)
+int yaffs_close(int handle)
{
yaffsfs_Handle *h = NULL;
- int retVal = 0;
+ struct yaffs_obj *obj = NULL;
+ int retVal = -1;
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
+ h = yaffsfs_HandleToPointer(handle);
+ obj = yaffsfs_HandleToObject(handle);
- if(h && h->useCount > 0) {
+ if(!h || !obj)
+ yaffsfs_SetError(-EBADF);
+ else {
/* clean up */
- yaffs_flush_file(yaffsfs_inode[h->inodeId].iObj,1,0);
- yaffsfs_PutHandle(fd);
+ yaffs_flush_file(obj,1,0);
+ yaffsfs_PutHandle(handle);
retVal = 0;
- } else {
- /* bad handle */
- yaffsfs_SetError(-EBADF);
- retVal = -1;
}
yaffsfs_Unlock();
-int yaffsfs_do_read(int fd, void *vbuf, unsigned int nbyte, int isPread, int offset)
+int yaffsfs_do_read(int handle, void *vbuf, unsigned int nbyte, int isPread, int offset)
{
- yaffsfs_Handle *h = NULL;
+ yaffsfs_FileDes *fd = NULL;
struct yaffs_obj *obj = NULL;
int pos = 0;
int startPos = 0;
+ int endPos = 0;
int nRead = 0;
int nToRead = 0;
int totalRead = 0;
unsigned int maxRead;
u8 *buf = (u8 *)vbuf;
+ if(!vbuf){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
+ fd = yaffsfs_HandleToFileDes(handle);
+ obj = yaffsfs_HandleToObject(handle);
- if(!h || !obj){
+ if(!fd || !obj){
/* bad handle */
yaffsfs_SetError(-EBADF);
totalRead = -1;
- } else if(!h->reading){
+ } else if(!fd->reading){
/* Not a reading handle */
yaffsfs_SetError(-EINVAL);
totalRead = -1;
if(isPread)
startPos = offset;
else
- startPos = h->position;
+ startPos = fd->position;
pos = startPos;
nbyte = maxRead;
- yaffsfs_GetHandle(fd);
+ yaffsfs_GetHandle(handle);
+
+ endPos = pos + nbyte;
+
+ if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
+ nbyte > YAFFS_MAX_FILE_SIZE ||
+ endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
+ totalRead = -1;
+ nbyte = 0;
+ }
while(nbyte > 0) {
nToRead = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
* Need to reverify object in case the device was
* unmounted in another thread.
*/
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(handle);
if(!obj)
nRead = 0;
else
}
- yaffsfs_PutHandle(fd);
+ yaffsfs_PutHandle(handle);
if(!isPread) {
if(totalRead >= 0)
- h->position = startPos + totalRead;
- else {
- /* todo error */
- }
+ fd->position = startPos + totalRead;
+ else
+ yaffsfs_SetError(-EINVAL);
}
}
}
-int yaffs_read(int fd, void *buf, unsigned int nbyte)
+int yaffs_read(int handle, void *buf, unsigned int nbyte)
{
- return yaffsfs_do_read(fd, buf, nbyte, 0, 0);
+ return yaffsfs_do_read(handle, buf, nbyte, 0, 0);
}
-int yaffs_pread(int fd, void *buf, unsigned int nbyte, unsigned int offset)
+int yaffs_pread(int handle, void *buf, unsigned int nbyte, unsigned int offset)
{
- return yaffsfs_do_read(fd, buf, nbyte, 1, offset);
+ return yaffsfs_do_read(handle, buf, nbyte, 1, offset);
}
-int yaffsfs_do_write(int fd, const void *vbuf, unsigned int nbyte, int isPwrite, int offset)
+int yaffsfs_do_write(int handle, const void *vbuf, unsigned int nbyte, int isPwrite, int offset)
{
- yaffsfs_Handle *h = NULL;
+ yaffsfs_FileDes *fd = NULL;
struct yaffs_obj *obj = NULL;
int pos = 0;
int startPos = 0;
+ int endPos;
int nWritten = 0;
int totalWritten = 0;
int write_trhrough = 0;
int nToWrite = 0;
const u8 *buf = (const u8 *)vbuf;
+ if(!vbuf){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
+ fd = yaffsfs_HandleToFileDes(handle);
+ obj = yaffsfs_HandleToObject(handle);
- if(!h || !obj){
+ if(!fd || !obj){
/* bad handle */
yaffsfs_SetError(-EBADF);
totalWritten = -1;
- } else if( h && obj && (!h->writing || obj->my_dev->read_only)){
+ } else if(!fd->writing){
yaffsfs_SetError(-EINVAL);
totalWritten=-1;
+ } else if(obj->my_dev->read_only){
+ yaffsfs_SetError(-EROFS);
+ totalWritten=-1;
} else {
- if(h->append)
+ if(fd->append)
startPos = yaffs_get_obj_length(obj);
else if(isPwrite)
startPos = offset;
else
- startPos = h->position;
+ startPos = fd->position;
- yaffsfs_GetHandle(fd);
+ yaffsfs_GetHandle(handle);
pos = startPos;
+ endPos = pos + nbyte;
+
+ if(pos < 0 || pos > YAFFS_MAX_FILE_SIZE ||
+ nbyte > YAFFS_MAX_FILE_SIZE ||
+ endPos < 0 || endPos > YAFFS_MAX_FILE_SIZE){
+ totalWritten = -1;
+ nbyte = 0;
+ }
+
while(nbyte > 0) {
nToWrite = YAFFSFS_RW_SIZE - (pos & (YAFFSFS_RW_SIZE -1));
* Need to reverify object in case the device was
* remounted or unmounted in another thread.
*/
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(handle);
if(!obj || obj->my_dev->read_only)
nWritten = 0;
else
}
}
- yaffsfs_PutHandle(fd);
+ yaffsfs_PutHandle(handle);
if(!isPwrite){
if(totalWritten > 0)
- h->position = startPos + totalWritten;
- else {
- /* todo error */
- }
+ fd->position = startPos + totalWritten;
+ else
+ yaffsfs_SetError(-EINVAL);
}
}
struct yaffs_obj *obj = NULL;
struct yaffs_obj *dir = NULL;
int result = YAFFS_FAIL;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1,&dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
+ else if(obj->my_dev->read_only)
+ yaffsfs_SetError(-EROFS);
else if(obj->variant_type != YAFFS_OBJECT_TYPE_FILE)
yaffsfs_SetError(-EISDIR);
else if(obj->my_dev->read_only)
- yaffsfs_SetError(-EACCES);
+ yaffsfs_SetError(-EROFS);
else if(new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
yaffsfs_SetError(-EINVAL);
else
return (result) ? 0 : -1;
}
-int yaffs_ftruncate(int fd, off_t new_size)
+int yaffs_ftruncate(int handle, off_t new_size)
{
- yaffsfs_Handle *h = NULL;
+ yaffsfs_FileDes *fd = NULL;
struct yaffs_obj *obj = NULL;
int result = 0;
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
+ fd = yaffsfs_HandleToFileDes(handle);
+ obj = yaffsfs_HandleToObject(handle);
- if(!h || !obj)
+ if(!fd || !obj)
/* bad handle */
yaffsfs_SetError(-EBADF);
+ else if(!fd->writing)
+ yaffsfs_SetError(-EINVAL);
else if(obj->my_dev->read_only)
- yaffsfs_SetError(-EACCES);
+ yaffsfs_SetError(-EROFS);
else if( new_size < 0 || new_size > YAFFS_MAX_FILE_SIZE)
yaffsfs_SetError(-EINVAL);
else
}
-off_t yaffs_lseek(int fd, off_t offset, int whence)
+off_t yaffs_lseek(int handle, off_t offset, int whence)
{
- yaffsfs_Handle *h = NULL;
+ yaffsfs_FileDes *fd = NULL;
struct yaffs_obj *obj = NULL;
int pos = -1;
int fSize = -1;
yaffsfs_Lock();
- h = yaffsfs_GetHandlePointer(fd);
- obj = yaffsfs_GetHandleObject(fd);
+ fd = yaffsfs_HandleToFileDes(handle);
+ obj = yaffsfs_HandleToObject(handle);
- if(!h || !obj)
+ if(!fd || !obj)
yaffsfs_SetError(-EBADF);
else if(offset > YAFFS_MAX_FILE_SIZE)
yaffsfs_SetError(-EINVAL);
if(offset >= 0)
pos = offset;
} else if(whence == SEEK_CUR) {
- if( (h->position + offset) >= 0)
- pos = (h->position + offset);
+ if( (fd->position + offset) >= 0)
+ pos = (fd->position + offset);
} else if(whence == SEEK_END) {
fSize = yaffs_get_obj_length(obj);
if(fSize >= 0 && (fSize + offset) >= 0)
pos = fSize + offset;
}
- if(pos >= 0)
- h->position = pos;
- else
+ if(pos >= 0 && pos <= YAFFS_MAX_FILE_SIZE)
+ fd->position = pos;
+ else{
yaffsfs_SetError(-EINVAL);
+ pos = -1;
+ }
}
yaffsfs_Unlock();
struct yaffs_obj *obj = NULL;
YCHAR *name;
int result = YAFFS_FAIL;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,0,NULL);
- dir = yaffsfs_FindDirectory(NULL,path,&name,0);
+ obj = yaffsfs_FindObject(NULL,path,0,0,NULL,NULL,NULL);
+ dir = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir)
+ yaffsfs_SetError(-ENOENT);
+ else if(yaffs_strncmp(name,_Y("."),2) == 0)
+ yaffsfs_SetError(-EINVAL);
else if(!obj)
yaffsfs_SetError(-ENOENT);
else if(obj->my_dev->read_only)
- yaffsfs_SetError(-EINVAL);
+ yaffsfs_SetError(-EROFS);
else if(!isDirectory && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY)
yaffsfs_SetError(-EISDIR);
else if(isDirectory && obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
yaffsfs_SetError(-ENOTDIR);
+ else if(isDirectory && obj == obj->my_dev->root_dir)
+ yaffsfs_SetError(-EBUSY); /* Can't rmdir a root */
else {
result = yaffs_unlinker(dir,name);
yaffsfs_Unlock();
- /* todo error */
-
return (result == YAFFS_FAIL) ? -1 : 0;
}
struct yaffs_obj *olddir = NULL;
struct yaffs_obj *newdir = NULL;
struct yaffs_obj *obj = NULL;
+ struct yaffs_obj *newobj = NULL;
YCHAR *oldname;
YCHAR *newname;
int result= YAFFS_FAIL;
int rename_allowed = 1;
+ int notOldDir = 0;
+ int notNewDir = 0;
+ int oldLoop = 0;
+ int newLoop = 0;
- yaffsfs_Lock();
+ YCHAR *alt_newpath=NULL;
+
+ if(!oldPath || !newPath){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
- if(yaffsfs_CheckPath(newPath) < 0){
+ if(yaffsfs_CheckPath(oldPath) < 0 ||
+ yaffsfs_CheckPath(newPath) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
}
- olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0);
- newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0);
- obj = yaffsfs_FindObject(NULL,oldPath,0,0,NULL);
+ if(yaffsfs_alt_dir_path(newPath, &alt_newpath) < 0){
+ yaffsfs_SetError(-ENOMEM);
+ return -1;
+ }
+ if(alt_newpath)
+ newPath = alt_newpath;
+
+ yaffsfs_Lock();
+
+
+ olddir = yaffsfs_FindDirectory(NULL,oldPath,&oldname,0,¬OldDir,&oldLoop);
+ newdir = yaffsfs_FindDirectory(NULL,newPath,&newname,0,¬NewDir,&newLoop);
+ obj = yaffsfs_FindObject(NULL,oldPath,0,0,NULL,NULL,NULL);
+ newobj = yaffsfs_FindObject(NULL,newPath,0,0,NULL,NULL,NULL);
- if(!olddir || !newdir) {
+ /* If the object being renamed is a directory and the
+ * path ended with a "/" then the olddir == obj.
+ * We pass through NULL for the old name to tell the lower layers
+ * to use olddir as the object.
+ */
+
+ if(olddir == obj)
+ oldname = NULL;
+
+ if((!olddir && notOldDir) || (!newdir && notNewDir)) {
yaffsfs_SetError(-ENOTDIR);
rename_allowed = 0;
- } else if(!obj) {
+ } else if(oldLoop || newLoop) {
+ yaffsfs_SetError(-ELOOP);
+ rename_allowed = 0;
+ } else if (olddir && oldname && yaffs_strncmp(oldname, _Y("."),2) == 0){
+ yaffsfs_SetError(-EINVAL);
+ rename_allowed = 0;
+ }else if(!olddir || !newdir || !obj) {
yaffsfs_SetError(-ENOENT);
rename_allowed = 0;
} else if(obj->my_dev->read_only){
yaffsfs_SetError(-EROFS);
rename_allowed = 0;
+ } else if(yaffs_is_non_empty_dir(newobj)){
+ yaffsfs_SetError(-ENOTEMPTY);
+ rename_allowed = 0;
} else if(olddir->my_dev != newdir->my_dev) {
/* Rename must be on same device */
yaffsfs_SetError(-EXDEV);
/*
* 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
+ * Do this by tracing from the new directory back to the root,
+ * checking for obj
*/
struct yaffs_obj *xx = newdir;
yaffsfs_Unlock();
+ if(alt_newpath)
+ YFREE(alt_newpath);
+
return (result == YAFFS_FAIL) ? -1 : 0;
}
{
struct yaffs_obj *obj=NULL;
struct yaffs_obj *dir=NULL;
-
int retVal = -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path || !buf){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1,&dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
if(!doLStat && obj)
- obj = yaffsfs_FollowLink(obj,0);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else
retVal = yaffsfs_DoStat(obj,buf);
int retVal = -1;
+ if(!buf){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj)
retVal = yaffsfs_DoStat(obj,buf);
/* xattrib functions */
-static int yaffs_do_setxattr(const YCHAR *path, const char *name, const void *data, int size, int flags, int follow)
+static int yaffs_do_setxattr(const YCHAR *path, const char *name,
+ const void *data, int size, int flags, int follow)
{
struct yaffs_obj *obj;
struct yaffs_obj *dir;
+ int notDir = 0;
+ int loop = 0;
int retVal = -1;
+ if(!path || !name || !data){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1,&dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
if(follow)
- obj = yaffsfs_FollowLink(obj,0);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else {
retVal = yaffs_set_xattrib(obj,name,data,size,flags);
int retVal = -1;
+ if(!name || !data){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(!obj)
yaffsfs_SetError(-EBADF);
{
struct yaffs_obj *obj;
struct yaffs_obj *dir;
-
int retVal = -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path || !name || !data ){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1,&dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
if(follow)
- obj = yaffsfs_FollowLink(obj,0);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else {
retVal = yaffs_get_xattrib(obj,name,data,size);
int retVal = -1;
+ if(!name || !data ){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj) {
retVal = yaffs_get_xattrib(obj,name,data,size);
{
struct yaffs_obj *obj=NULL;
struct yaffs_obj *dir=NULL;
-
int retVal = -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path || !data ){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1,&dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1,&dir,¬Dir,&loop);
if(follow)
- obj = yaffsfs_FollowLink(obj,0);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else {
retVal = yaffs_list_xattrib(obj, data,size);
int retVal = -1;
+ if(!data ){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj) {
retVal = yaffs_list_xattrib(obj,data,size);
{
struct yaffs_obj *obj=NULL;
struct yaffs_obj *dir=NULL;
-
+ int notDir = 0;
+ int loop = 0;
int retVal = -1;
+ if(!path || !name){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1, &dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
if(follow)
- obj = yaffsfs_FollowLink(obj,0);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else {
retVal = yaffs_remove_xattrib(obj,name);
int retVal = -1;
+ if(!name){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj){
retVal = yaffs_remove_xattrib(obj,name);
int retVal = -1;
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj){
int retVal = -1;
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(obj){
{
struct yaffs_obj *obj=NULL;
struct yaffs_obj *dir=NULL;
-
+ int notDir = 0;
+ int loop = 0;
int retval = -1;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1, &dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
- else {
+ else if((amode & W_OK) && obj->my_dev->read_only)
+ yaffsfs_SetError(-EROFS);
+ else{
int access_ok = 1;
if((amode & R_OK) && !(obj->yst_mode & S_IREAD))
struct yaffs_obj *obj=NULL;
struct yaffs_obj *dir=NULL;
int retVal = -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1, &dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1, &dir, ¬Dir,&loop);
+ obj = yaffsfs_FollowLink(obj,0,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else if(obj->my_dev->read_only)
yaffsfs_SetError(-EROFS);
}
yaffsfs_Lock();
- obj = yaffsfs_GetHandleObject(fd);
+ obj = yaffsfs_HandleToObject(fd);
if(!obj)
yaffsfs_SetError(-EBADF);
return retVal;
}
-
-static int yaffsfs_alt_dir_path(const YCHAR *path, YCHAR **ret_path)
-{
- YCHAR *alt_path = NULL;
- int path_length;
- int i;
-
- /*
- * We don't have a definition for max path length.
- * We will use 3 * max name length instead.
- */
- *ret_path = NULL;
- path_length = strnlen(path,(YAFFS_MAX_NAME_LENGTH+1)*3 +1);
-
- /* If the last character is a path divider, then we need to
- * trim it back so that the name look-up works properly.
- * eg. /foo/new_dir/ -> /foo/newdir
- * Curveball: Need to handle multiple path dividers:
- * eg. /foof/sdfse///// -> /foo/sdfse
- */
- if(path_length > 0 &&
- yaffsfs_IsPathDivider(path[path_length-1])){
- alt_path = YMALLOC(path_length + 1);
- if(!alt_path)
- return -1;
- strcpy(alt_path, path);
- for(i = path_length-1;
- i >= 0 && yaffsfs_IsPathDivider(alt_path[i]);
- i--)
- alt_path[i] = (YCHAR) 0;
- }
- *ret_path = alt_path;
- return 0;
-}
-
int yaffs_mkdir(const YCHAR *path, mode_t mode)
{
struct yaffs_obj *parent = NULL;
YCHAR *name;
YCHAR *alt_path = NULL;
int retVal= -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
path = alt_path;
yaffsfs_Lock();
- parent = yaffsfs_FindDirectory(NULL,path,&name,0);
- if(!parent)
+ parent = yaffsfs_FindDirectory(NULL,path,&name,0,¬Dir,&loop);
+ if(!parent && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(parent && yaffs_strnlen(name,5) == 0){
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!parent)
+ yaffsfs_SetError(-ENOENT);
+ else if(yaffs_strnlen(name,5) == 0){
/* Trying to make the root itself */
yaffsfs_SetError(-EEXIST);
- } else if(parent && parent->my_dev->read_only)
+ } else if(parent->my_dev->read_only)
yaffsfs_SetError(-EROFS);
else {
dir = yaffs_create_dir(parent,name,mode,0,0);
int result;
YCHAR *alt_path;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
int result=YAFFS_FAIL;
struct yaffs_dev *dev=NULL;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
T(YAFFS_TRACE_MOUNT,(TSTR("yaffs: Mounting %s" TENDSTR),path));
if(yaffsfs_CheckPath(path) < 0){
dev->read_only = read_only ? 1 : 0;
result = yaffs_guts_initialise(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();
struct yaffs_dev *dev=NULL;
YCHAR *dummy;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
yaffsfs_Lock();
dev = yaffsfs_FindDevice(path,&dummy);
if(dev){
- if(dev->is_mounted){
+ if(!dev->is_mounted)
+ yaffsfs_SetError(-EINVAL);
+ else if(dev->read_only)
+ yaffsfs_SetError(-EROFS);
+ else {
yaffs_flush_whole_cache(dev);
yaffs_checkpoint_save(dev);
retVal = 0;
- } else
- /* todo error - not mounted. */
- yaffsfs_SetError(-EINVAL);
-
+ }
}else
- /* todo error - no device */
yaffsfs_SetError(-ENODEV);
yaffsfs_Unlock();
}
+static int yaffsfs_IsDevBusy(struct yaffs_dev * dev)
+{
+ int i;
+ struct yaffs_obj *obj;
+
+ for(i = 0; i < YAFFSFS_N_HANDLES; i++){
+ obj = yaffsfs_HandleToObject(i);
+ if(obj && obj->my_dev == dev)
+ return 1;
+ }
+ return 0;
+}
+
+
int yaffs_remount(const YCHAR *path, int force, int read_only)
{
int retVal=-1;
struct yaffs_dev *dev=NULL;
- yaffsfs_Handle *yh;
+
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
dev = yaffsfs_FindMountPoint(path);
if(dev){
if(dev->is_mounted){
- int i;
- int inUse;
-
yaffs_flush_whole_cache(dev);
- for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse && !force; i++){
- yh = & yaffsfs_handle[i];
- if(yh->useCount>0 &&
- yaffsfs_inode[yh->inodeId].iObj->my_dev == dev)
- inUse = 1; /* the device is in use, can't unmount */
- }
-
- if(!inUse || force){
+ if(force || ! yaffsfs_IsDevBusy(dev)){
if(read_only)
yaffs_checkpoint_save(dev);
dev->read_only = read_only ? 1 : 0;
int retVal=-1;
struct yaffs_dev *dev=NULL;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
dev = yaffsfs_FindMountPoint(path);
if(dev){
if(dev->is_mounted){
- int i;
int inUse;
-
yaffs_flush_whole_cache(dev);
yaffs_checkpoint_save(dev);
-
- for(i = inUse = 0; i < YAFFSFS_N_HANDLES && !inUse; i++){
- if(yaffsfs_handle[i].useCount > 0 &&
- yaffsfs_inode[yaffsfs_handle[i].inodeId].iObj->my_dev == dev)
- inUse = 1; /* the device is in use, can't unmount */
- }
-
+ inUse = yaffsfs_IsDevBusy(dev);
if(!inUse || force){
if(inUse)
- yaffsfs_PutDeviceHandles(dev);
+ yaffsfs_BreakDeviceHandles(dev);
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();
struct yaffs_dev *dev=NULL;
YCHAR *dummy;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
struct yaffs_dev *dev=NULL;
YCHAR *dummy;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
struct yaffs_dev *dev=NULL;
YCHAR *dummy;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
yaffs_DIR *dir = NULL;
struct yaffs_obj *obj = NULL;
yaffsfs_DirectorySearchContext *dsc = NULL;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!dirname){
+ yaffsfs_SetError(-EFAULT);
+ return NULL;
+ }
if(yaffsfs_CheckPath(dirname) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
- return -1;
+ return NULL;
}
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,dirname,0,1,NULL);
+ obj = yaffsfs_FindObject(NULL,dirname,0,1,NULL,¬Dir,&loop);
- if(obj && obj->variant_type == YAFFS_OBJECT_TYPE_DIRECTORY){
+ if(!obj && notDir)
+ yaffsfs_SetError(-ENOTDIR);
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!obj)
+ yaffsfs_SetError(-ENOENT);
+ else if(obj->variant_type != YAFFS_OBJECT_TYPE_DIRECTORY)
+ yaffsfs_SetError(-ENOTDIR);
+ else {
dsc = YMALLOC(sizeof(yaffsfs_DirectorySearchContext));
dir = (yaffs_DIR *)dsc;
{
yaffsfs_DirectorySearchContext *dsc = (yaffsfs_DirectorySearchContext *)dirp;
+ if(!dsc){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
yaffsfs_Lock();
dsc->magic = 0;
list_del(&dsc->others); /* unhook from list */
YCHAR *name;
int retVal= -1;
int mode = 0; /* ignore for now */
+ int notDir = 0;
+ int loop = 0;
+
+ if(!oldpath || !newpath){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
- if(yaffsfs_CheckPath(newpath) < 0){
+ if(yaffsfs_CheckPath(newpath) < 0 ||
+ yaffsfs_CheckPath(oldpath) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
}
+
yaffsfs_Lock();
- parent = yaffsfs_FindDirectory(NULL,newpath,&name,0);
- if(!parent)
+ parent = yaffsfs_FindDirectory(NULL,newpath,&name,0,¬Dir,&loop);
+ if(!parent && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if( strlen(name) < 1)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if( !parent || yaffs_strnlen(name,5) < 1)
yaffsfs_SetError(-ENOENT);
else if(parent->my_dev->read_only)
yaffsfs_SetError(-EROFS);
obj = yaffs_create_symlink(parent,name,mode,0,0,oldpath);
if(obj)
retVal = 0;
- else{
- yaffsfs_SetError(-ENOSPC); /* just assume no space for now */
- retVal = -1;
- }
+ else if (yaffsfs_FindObject(NULL,newpath,0,0, NULL,NULL,NULL))
+ yaffsfs_SetError(-EEXIST);
+ else
+ yaffsfs_SetError(-ENOSPC);
}
yaffsfs_Unlock();
struct yaffs_obj *obj = NULL;
struct yaffs_obj *dir = NULL;
int retVal= -1;
+ int notDir = 0;
+ int loop = 0;
+
+ if(!path || !buf){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,path,0,1, &dir);
+ obj = yaffsfs_FindObject(NULL,path,0,1, &dir,¬Dir,&loop);
- if(!dir)
+ if(!dir && notDir)
yaffsfs_SetError(-ENOTDIR);
- else if(!obj)
+ else if(loop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!dir || !obj)
yaffsfs_SetError(-ENOENT);
else if(obj->variant_type != YAFFS_OBJECT_TYPE_SYMLINK)
yaffsfs_SetError(-EINVAL);
/* Creates a link called newpath to existing oldpath */
struct yaffs_obj *obj = NULL;
struct yaffs_obj *lnk = NULL;
+ struct yaffs_obj *obj_dir = NULL;
+ struct yaffs_obj *lnk_dir = NULL;
int retVal = -1;
+ int notDirObj = 0;
+ int notDirLnk = 0;
+ int objLoop = 0;
+ int lnkLoop = 0;
+ YCHAR *newname;
+
+ if(!oldpath || !linkpath){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
- if(yaffsfs_CheckPath(linkpath) < 0){
+ if(yaffsfs_CheckPath(linkpath) < 0 ||
+ yaffsfs_CheckPath(oldpath) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
}
yaffsfs_Lock();
- obj = yaffsfs_FindObject(NULL,oldpath,0,1,NULL);
- lnk = yaffsfs_FindObject(NULL,linkpath,0,0,NULL);
+ obj = yaffsfs_FindObject(NULL,oldpath,0,1,&obj_dir,¬DirObj,&objLoop);
+ lnk = yaffsfs_FindObject(NULL,linkpath,0,0,NULL,NULL,NULL);
+ lnk_dir = yaffsfs_FindDirectory(NULL,linkpath,&newname,0,¬DirLnk,&lnkLoop);
- if(!obj)
+ if((!obj_dir && notDirObj) || (!lnk_dir && notDirLnk))
+ yaffsfs_SetError(-ENOTDIR);
+ else if(objLoop || lnkLoop)
+ yaffsfs_SetError(-ELOOP);
+ else if(!obj_dir || !lnk_dir || !obj)
yaffsfs_SetError(-ENOENT);
else if(obj->my_dev->read_only)
- yaffsfs_SetError(-EINVAL);
+ yaffsfs_SetError(-EROFS);
else if(lnk)
yaffsfs_SetError(-EEXIST);
- else {
- struct yaffs_obj *newdir = NULL;
- struct yaffs_obj *link = NULL;
-
- YCHAR *newname;
-
- newdir = yaffsfs_FindDirectory(NULL,linkpath,&newname,0);
-
- if(!newdir)
- yaffsfs_SetError(-ENOTDIR);
- else if(newdir->my_dev != obj->my_dev)
- yaffsfs_SetError(-EXDEV);
-
+ else if(lnk_dir->my_dev != obj->my_dev)
+ yaffsfs_SetError(-EXDEV);
+ else {
retVal = yaffsfs_CheckNameLength(newname);
if(retVal == 0) {
- link = yaffs_link_obj(newdir,newname,obj);
- if(link)
+ lnk = yaffs_link_obj(lnk_dir,newname,obj);
+ if(lnk)
retVal = 0;
else{
yaffsfs_SetError(-ENOSPC);
retVal = -1;
}
-
}
}
yaffsfs_Unlock();
}
-
+/*
+ * D E B U G F U N C T I O N S
+ */
+
/*
* yaffs_n_handles()
* Returns number of handles attached to the object
{
struct yaffs_obj *obj;
+ if(!path){
+ yaffsfs_SetError(-EFAULT);
+ return -1;
+ }
+
if(yaffsfs_CheckPath(path) < 0){
yaffsfs_SetError(-ENAMETOOLONG);
return -1;
}
- obj = yaffsfs_FindObject(NULL,path,0,1,NULL);
+ obj = yaffsfs_FindObject(NULL,path,0,1,NULL,NULL,NULL);
if(obj)
return yaffsfs_CountHandles(obj);
int yaffs_set_error(int error)
{
- /*yaffsfs_SetError does not return. So the program is assumed to have worked. */
yaffsfs_SetError(error);
return 0;
}
projects / yaffs2.git / blobdiff