mirror of https://github.com/schoebel/mars
80 lines
1.5 KiB
C
80 lines
1.5 KiB
C
// (c) 2010 Thomas Schoebel-Theuer / 1&1 Internet AG
|
|
#ifndef MARS_COPY_H
|
|
#define MARS_COPY_H
|
|
|
|
#include <linux/wait.h>
|
|
#include <linux/semaphore.h>
|
|
|
|
#define INPUT_A_IO 0
|
|
#define INPUT_A_COPY 1
|
|
#define INPUT_B_IO 2
|
|
#define INPUT_B_COPY 3
|
|
|
|
//#define COPY_CHUNK (64 * 1024)
|
|
#define COPY_CHUNK (PAGE_SIZE)
|
|
#define MAX_COPY_PARA (4 * 1024 * 1024 / COPY_CHUNK)
|
|
|
|
enum {
|
|
COPY_STATE_START = 0,
|
|
COPY_STATE_READ1 = 1,
|
|
COPY_STATE_READ2 = 2,
|
|
COPY_STATE_WRITE = 3,
|
|
COPY_STATE_WRITTEN = 4,
|
|
COPY_STATE_CLEANUP = 5,
|
|
COPY_STATE_FINISHED = 6,
|
|
};
|
|
|
|
struct copy_state {
|
|
struct mref_object *table[2];
|
|
bool active[2];
|
|
char state;
|
|
short prev;
|
|
short len;
|
|
short error;
|
|
};
|
|
|
|
struct copy_mref_aspect {
|
|
GENERIC_ASPECT(mref);
|
|
struct copy_brick *brick;
|
|
int queue;
|
|
};
|
|
|
|
struct copy_brick {
|
|
MARS_BRICK(copy);
|
|
// parameters
|
|
loff_t copy_start;
|
|
loff_t copy_end; // stop working if == 0
|
|
int io_prio;
|
|
int append_mode; // 1 = passively, 2 = actively
|
|
bool verify_mode;
|
|
bool utilize_mode; // utilize already copied data
|
|
bool abort_mode; // abort on IO error (default is retry forever)
|
|
// readonly from outside
|
|
loff_t copy_last; // current working position
|
|
int copy_error;
|
|
bool low_dirty;
|
|
bool is_aborting;
|
|
// internal
|
|
bool trigger;
|
|
unsigned long clash;
|
|
atomic_t io_flight;
|
|
atomic_t copy_flight;
|
|
long long last_jiffies;
|
|
wait_queue_head_t event;
|
|
struct semaphore mutex;
|
|
struct task_struct *thread;
|
|
struct copy_state st[MAX_COPY_PARA];
|
|
};
|
|
|
|
struct copy_input {
|
|
MARS_INPUT(copy);
|
|
};
|
|
|
|
struct copy_output {
|
|
MARS_OUTPUT(copy);
|
|
};
|
|
|
|
MARS_TYPES(copy);
|
|
|
|
#endif
|