int bufferfork_to_invalidate(map_t *map, struct buffer_head *buffer)
{
unsigned delta = tux3_inode_delta(map->inode);
/*
* The userland shouldn't need to buffer fork on truncate
* path, because no async backend. So, just make sure it.
*/
assert(buffer_can_modify(buffer, delta));
return 0;
}
int bufferfork_to_invalidate(map_t *map, struct buffer_head *buffer)
{
if(DEBUG_MODE_U==1)
{
printf("\t\t\t\t%25s[U] %25s %4d #in\n",__FILE__,__func__,__LINE__);
}
unsigned delta = tux3_inode_delta(map->inode);
/*
* The userland shouldn't need to buffer fork on truncate
* path, because no async backend. So, just make sure it.
*/
assert(buffer_can_modify(buffer, delta));
return 0;
}
/*
* Caller must hold lock_page() or backend (otherwise, you may race
* with buffer fork or set dirty)
*/
void tux3_clear_buffer_dirty(struct buffer_head *buffer, unsigned delta)
{
struct address_space *buffer_mapping = buffer->b_assoc_map;
/* The buffer must not need to fork */
assert(buffer_can_modify(buffer, delta));
if (buffer_mapping) {
spin_lock(&buffer_mapping->private_lock);
list_del_init(&buffer->b_assoc_buffers);
buffer->b_assoc_map = NULL;
tux3_clear_bufdelta(buffer);
spin_unlock(&buffer_mapping->private_lock);
clear_buffer_dirty(buffer);
} else
BUG_ON(!list_empty(&buffer->b_assoc_buffers));
}
