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typedef struct MLock MLock;
typedef struct Iosect Iosect;
typedef struct Iotrack Iotrack;
typedef struct Track Track;
typedef struct Xfs Xfs;
struct MLock
{
char key;
};
struct Iosect
{
Iosect *next;
short flags;
MLock lock;
Iotrack *t;
uchar * iobuf;
};
struct Iotrack
{
short flags;
Xfs * xf;
long addr;
Iotrack *next; /* in lru list */
Iotrack *prev;
Iotrack *hnext; /* in hash list */
Iotrack *hprev;
MLock lock;
int ref;
Track *tp;
};
enum{
Sectorsize = 512,
Sect2trk = 9,
Trksize = Sectorsize*Sect2trk
};
struct Track
{
Iosect *p[Sect2trk];
uchar buf[Sect2trk][Sectorsize];
};
#define BMOD (1<<0)
#define BIMM (1<<1)
#define BSTALE (1<<2)
Iosect* getiosect(Xfs*, long, int);
Iosect* getosect(Xfs*, long);
Iosect* getsect(Xfs*, long);
Iosect* newsect(void);
Iotrack* getiotrack(Xfs*, long);
int canmlock(MLock*);
int devcheck(Xfs*);
int devread(Xfs*, long, void*, long);
int devwrite(Xfs*, long, void*, long);
int tread(Iotrack*);
int twrite(Iotrack*);
void freesect(Iosect*);
void iotrack_init(void);
void mlock(MLock*);
void purgebuf(Xfs*);
void purgetrack(Iotrack*);
void putsect(Iosect*);
void sync(void);
void unmlock(MLock*);
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