static int vfs_read_write(int op, int helper_pid, void *data, int fd, int count, unsigned *pos)
{
struct expressos_venus_proc *proc;
struct file *file;
mm_segment_t fs_save;
int ret;
loff_t p = *pos;
if (!(proc = expressos_venus_find_proc(helper_pid)))
return -EINVAL;
if (!(file = expressos_venus_fget(proc, fd)))
return -EBADF;
fs_save = get_fs();
set_fs(get_ds());
if (op == VFS_OP_READ)
ret = vfs_read(file, data, count, &p);
else
ret = vfs_write(file, data, count, &p);
*pos = p;
set_fs(fs_save);
fput(file);
return ret;
}
int expressos_ipc_ioctl(int helper_pid, int fd, unsigned cmd, int arg0)
{
int ret;
mm_segment_t fs_save;
struct expressos_venus_proc *proc;
struct file *file;
switch (cmd) {
case FIONREAD:
arg0 = (int)expressos_ipc_shm_buf;
break;
default:
return -ENOTTY;
}
if (!(proc = expressos_venus_find_proc(helper_pid)))
return -EINVAL;
if (!(file = expressos_venus_fget(proc, fd)))
return -EBADF;
fs_save = get_fs();
set_fs(get_ds());
ret = do_vfs_ioctl(file, -1, cmd, arg0);
set_fs(fs_save);
fput(file);
return ret;
}
int expressos_ipc_scatter_write_page_async(int helper_pid, int fd,
int page_count, const void *data)
{
struct expressos_venus_proc *proc;
struct file *file;
mm_segment_t fs_save;
int ret, i;
const int *pg_offs = (const int*)data;
const char *blob = (const char*)(pg_offs + page_count);
if (!expressos_ipc_valid_ptr(pg_offs)
|| !expressos_ipc_valid_trunk(blob, page_count * PAGE_SIZE))
return -EFAULT;
if (!(proc = expressos_venus_find_proc(helper_pid)))
return -EINVAL;
if (!(file = expressos_venus_fget(proc, fd)))
return -EBADF;
fs_save = get_fs();
set_fs(get_ds());
i = 0;
while (i < page_count) {
int j = i + 1;
loff_t pos = pg_offs[i] * PAGE_SIZE;
/*
* Consolidate write requests.
*/
while (j < page_count && pg_offs[j] == pg_offs[i] + (j - i))
++j;
ret = vfs_write(file, blob + i * PAGE_SIZE,
(j - i) * PAGE_SIZE, &pos);
if (ret < 0)
printk(KERN_WARNING "expressos_ipc_flush_pages_async:"
"failed to write to pgoffset %d, fd=%d, ret=%d\n",
pg_offs[i], fd, ret);
i = j;
}
set_fs(fs_save);
fput(file);
return 0;
}
int expressos_ipc_ashmem_ioctl(int helper_pid, int fd, unsigned cmd, int arg0)
{
int ret;
mm_segment_t fs_save;
struct expressos_venus_proc *proc;
struct file *file;
switch (cmd) {
case ASHMEM_PIN:
case ASHMEM_UNPIN:
case ASHMEM_SET_NAME:
case ASHMEM_GET_NAME:
arg0 = (int)expressos_ipc_shm_buf;
break;
case ASHMEM_SET_SIZE:
case ASHMEM_GET_SIZE:
case ASHMEM_SET_PROT_MASK:
case ASHMEM_GET_PROT_MASK:
case ASHMEM_GET_PIN_STATUS:
case ASHMEM_PURGE_ALL_CACHES:
break;
default:
return -ENOSYS;
}
if (!(proc = expressos_venus_find_proc(helper_pid)))
return -EINVAL;
if (!(file = expressos_venus_fget(proc, fd)))
return -EBADF;
fs_save = get_fs();
set_fs(get_ds());
ret = do_vfs_ioctl(file, -1, cmd, arg0);
set_fs(fs_save);
fput(file);
return ret;
}
int expressos_ipc_fcntl64(int helper_pid, int fd, int cmd, int arg0)
{
int ret;
mm_segment_t fs_save;
struct expressos_venus_proc *proc;
struct file *file;
if (!(proc = expressos_venus_find_proc(helper_pid)))
return -EINVAL;
if (!(file = expressos_venus_fget(proc, fd)))
return -EBADF;
fs_save = get_fs();
set_fs(get_ds());
ret = do_fcntl(-1, cmd, arg0, file);
set_fs(fs_save);
fput(file);
return ret;
}
