mirror of https://github.com/schoebel/mars
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
|
|
#ifndef MARS_BUF_H
|
|
#define MARS_BUF_H
|
|
|
|
#include <linux/list.h>
|
|
|
|
#define MARS_BUF_HASH_MAX 512
|
|
|
|
struct buf_mars_io_aspect {
|
|
GENERIC_ASPECT(mars_io);
|
|
};
|
|
|
|
struct buf_mars_buf_aspect {
|
|
GENERIC_ASPECT(mars_buf);
|
|
struct list_head bf_member_head;
|
|
struct list_head bf_pending_head;
|
|
struct buf_head *bf;
|
|
};
|
|
|
|
struct buf_brick {
|
|
MARS_BRICK(buf);
|
|
int backing_order;
|
|
int backing_size;
|
|
int max_count;
|
|
int current_count;
|
|
int alloc_count;
|
|
struct mars_io_object_layout *mio_layout;
|
|
|
|
spinlock_t buf_lock;
|
|
|
|
// lists for caching
|
|
struct list_head free_anchor; // members are not hashed
|
|
struct list_head lru_anchor; // members are hashed
|
|
struct list_head cache_anchors[MARS_BUF_HASH_MAX]; // hash table
|
|
|
|
// for creation of bios
|
|
struct mars_info base_info;
|
|
int got_info;
|
|
int bvec_max;
|
|
};
|
|
|
|
struct buf_input {
|
|
MARS_INPUT(buf);
|
|
};
|
|
|
|
struct buf_output {
|
|
MARS_OUTPUT(buf);
|
|
int io_aspect_slot;
|
|
int buf_aspect_slot;
|
|
};
|
|
|
|
MARS_TYPES(buf);
|
|
|
|
struct buf_head {
|
|
struct buf_brick *bf_brick;
|
|
void *bf_data;
|
|
loff_t bf_pos;
|
|
int bf_flags;
|
|
int bf_count;
|
|
// lists for caching
|
|
struct list_head bf_mbuf_anchor; // all current mbuf members
|
|
struct list_head bf_lru_head;
|
|
struct list_head bf_hash_head;
|
|
// lists for IO
|
|
struct list_head bf_read_pending_anchor;
|
|
struct list_head bf_write_pending_anchor;
|
|
struct list_head bf_again_write_pending_anchor;
|
|
};
|
|
|
|
#endif
|