int
host_read(uint32_t secno, void *dst, size_t nsecs)
{
int r, read = 0;
if(host_fd->fd_file.id == 0) {
host_ipc_init();
}
//This rewrites offset visible to host fs as well
host_fd->fd_offset = secno * SECTSIZE;
// read from the host, 2 sectors at a time.
for(; nsecs > 0; nsecs-=2) {
host_fsipcbuf.read.req_fileid = host_fd->fd_file.id;
host_fsipcbuf.read.req_n = SECTSIZE * 2;
if ((r = host_fsipc(FSREQ_READ, NULL)) < 0)
return r;
// FIXME: Handle case where r < SECTSIZE * 2;
memmove(dst+read, &host_fsipcbuf, r);
read += SECTSIZE * 2;
}
return 0;
}
void
host_ipc_init()
{
int r;
if ((r = fd_alloc(&host_fd)) < 0)
panic("Couldn't allocate an fd!");
strcpy(host_fsipcbuf.open.req_path, HOST_FS_FILE);
host_fsipcbuf.open.req_omode = O_RDWR;
if ((r = host_fsipc(FSREQ_OPEN, host_fd)) < 0) {
fd_close(host_fd, 0);
panic("Couldn't open host file!");
}
}
void
host_ipc_init()
{
int r;
if ((r = fd_alloc(&host_fd)) < 0)
//if(( host_fd = (struct Fd*)malloc(sizeof(host_fd)))< 0)
if((r = sys_page_alloc(0, (void*)host_fd, PTE_P|PTE_W|PTE_U)) < 0)
panic("Couldn't allocate an fd!");
strcpy(host_fsipcbuf.open.req_path, HOST_FS_FILE);
host_fsipcbuf.open.req_omode = O_RDWR;
if ((r = host_fsipc(FSREQ_OPEN, host_fd)) < 0) {
fd_close(host_fd, 0);
panic("Couldn't open host file!");
}
}
int
host_write(uint32_t secno, const void *src, size_t nsecs)
{
int r, written = 0;
if(host_fd->fd_file.id == 0) {
host_ipc_init();
}
host_fd->fd_offset = secno * SECTSIZE;
for(; nsecs > 0; nsecs-=2) {
host_fsipcbuf.write.req_fileid = host_fd->fd_file.id;
host_fsipcbuf.write.req_n = SECTSIZE * 2;
memmove(host_fsipcbuf.write.req_buf, src+written, SECTSIZE * 2);
if ((r = host_fsipc(FSREQ_WRITE, NULL)) < 0)
return r;
written += SECTSIZE * 2;
}
return 0;
}
void
host_ipc_init()
{
int r;
if ((r = fd_alloc(&host_fd)) < 0)
panic("Couldn't allocate an fd!");
//r = sys_page_alloc(0, &host_fd, PTE_P | PTE_U | PTE_W);
//if (r < 0)
//{
// panic("Not Valid ALloc");
//}
strcpy(host_fsipcbuf.open.req_path, HOST_FS_FILE);
host_fsipcbuf.open.req_omode = O_RDWR;
if ((r = host_fsipc(FSREQ_OPEN, host_fd)) < 0) {
fd_close(host_fd, 0);
panic("Couldn't open host file!");
}
}
