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;
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);
if(nWritten >= 0)
{
h->position = pos + nWritten;
}
else
{
//todo error
}
}
yaffsfs_Unlock();
return (nWritten >= 0) ? nWritten : -1;
}
static int yaffs_writepage(struct page *page)
#endif
{
struct address_space *mapping = page->mapping;
loff_t offset = (loff_t) page->index << PAGE_CACHE_SHIFT;
struct inode *inode;
unsigned long end_index;
char *buffer;
yaffs_Object *obj;
int nWritten = 0;
unsigned nBytes;
if (!mapping)
BUG();
inode = mapping->host;
if (!inode)
BUG();
if (offset > inode->i_size) {
T(YAFFS_TRACE_OS,
(KERN_DEBUG
"yaffs_writepage at %08x, inode size = %08x!!!\n",
(unsigned)(page->index << PAGE_CACHE_SHIFT),
(unsigned)inode->i_size));
T(YAFFS_TRACE_OS,
(KERN_DEBUG " -> don't care!!\n"));
unlock_page(page);
return 0;
}
end_index = inode->i_size >> PAGE_CACHE_SHIFT;
if (page->index < end_index) {
nBytes = PAGE_CACHE_SIZE;
} else {
nBytes = inode->i_size & (PAGE_CACHE_SIZE - 1);
}
get_page(page);
buffer = kmap(page);
obj = yaffs_InodeToObject(inode);
yaffs_GrossLock(obj->myDev);
T(YAFFS_TRACE_OS,
(KERN_DEBUG "yaffs_writepage at %08x, size %08x\n",
(unsigned)(page->index << PAGE_CACHE_SHIFT), nBytes));
T(YAFFS_TRACE_OS,
(KERN_DEBUG "writepag0: obj = %05x, ino = %05x\n",
(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
nWritten =
yaffs_WriteDataToFile(obj, buffer, page->index << PAGE_CACHE_SHIFT,
nBytes, 0);
T(YAFFS_TRACE_OS,
(KERN_DEBUG "writepag1: obj = %05x, ino = %05x\n",
(int)obj->variant.fileVariant.fileSize, (int)inode->i_size));
yaffs_GrossUnlock(obj->myDev);
kunmap(page);
SetPageUptodate(page);
UnlockPage(page);
put_page(page);
return (nWritten == nBytes) ? 0 : -ENOSPC;
}
