520 lines
10 KiB
C
520 lines
10 KiB
C
|
#define KNAMELEN 28 /* max length of name held in kernel */
|
||
|
|
#define DOMLEN 64
|
||
|
|
|
||
|
|
#define BLOCKALIGN 8
|
||
|
|
|
||
|
|
typedef struct Alarms Alarms;
|
||
|
|
typedef struct Block Block;
|
||
|
|
typedef struct CSN CSN;
|
||
|
|
typedef struct Chan Chan;
|
||
|
|
typedef struct Cmdbuf Cmdbuf;
|
||
|
|
typedef struct Cmdtab Cmdtab;
|
||
|
|
typedef struct Cname Cname;
|
||
|
|
typedef struct Conf Conf;
|
||
|
|
typedef struct Dev Dev;
|
||
|
|
typedef struct Dirtab Dirtab;
|
||
|
|
typedef struct Edfinterface Edfinterface;
|
||
|
|
typedef struct Egrp Egrp;
|
||
|
|
typedef struct Evalue Evalue;
|
||
|
|
typedef struct Fgrp Fgrp;
|
||
|
|
typedef struct FPsave FPsave;
|
||
|
|
typedef struct DevConf DevConf;
|
||
|
|
typedef struct Label Label;
|
||
|
|
typedef struct List List;
|
||
|
|
typedef struct Log Log;
|
||
|
|
typedef struct Logflag Logflag;
|
||
|
|
typedef struct Mntcache Mntcache;
|
||
|
|
typedef struct Mount Mount;
|
||
|
|
typedef struct Mntrpc Mntrpc;
|
||
|
|
typedef struct Mntwalk Mntwalk;
|
||
|
|
typedef struct Mnt Mnt;
|
||
|
|
typedef struct Mhead Mhead;
|
||
|
|
typedef struct Note Note;
|
||
|
|
typedef struct Page Page;
|
||
|
|
typedef struct Palloc Palloc;
|
||
|
|
typedef struct Perf Perf;
|
||
|
|
typedef struct Pgrps Pgrps;
|
||
|
|
typedef struct PhysUart PhysUart;
|
||
|
|
typedef struct Pgrp Pgrp;
|
||
|
|
typedef struct Physseg Physseg;
|
||
|
|
typedef struct Proc Proc;
|
||
|
|
typedef struct Pte Pte;
|
||
|
|
typedef struct Pthash Pthash;
|
||
|
|
typedef struct Queue Queue;
|
||
|
|
typedef struct Ref Ref;
|
||
|
|
typedef struct Rendez Rendez;
|
||
|
|
typedef struct Rgrp Rgrp;
|
||
|
|
typedef struct RWlock RWlock;
|
||
|
|
typedef struct Schedq Schedq;
|
||
|
|
typedef struct Segment Segment;
|
||
|
|
typedef struct Session Session;
|
||
|
|
typedef struct Task Task;
|
||
|
|
typedef struct Talarm Talarm;
|
||
|
|
typedef struct Timer Timer;
|
||
|
|
typedef struct Uart Uart;
|
||
|
|
typedef struct Ureg Ureg;
|
||
|
|
typedef struct Waitq Waitq;
|
||
|
|
typedef struct Walkqid Walkqid;
|
||
|
|
typedef int Devgen(Chan*, char*, Dirtab*, int, int, Dir*);
|
||
|
|
|
||
|
|
#include "fcall.h"
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
SnarfSize = 64*1024,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Conf
|
||
|
|
{
|
||
|
|
ulong nmach; /* processors */
|
||
|
|
ulong nproc; /* processes */
|
||
|
|
ulong monitor; /* has monitor? */
|
||
|
|
ulong npage0; /* total physical pages of memory */
|
||
|
|
ulong npage1; /* total physical pages of memory */
|
||
|
|
ulong npage; /* total physical pages of memory */
|
||
|
|
ulong upages; /* user page pool */
|
||
|
|
ulong nimage; /* number of page cache image headers */
|
||
|
|
ulong nswap; /* number of swap pages */
|
||
|
|
int nswppo; /* max # of pageouts per segment pass */
|
||
|
|
ulong base0; /* base of bank 0 */
|
||
|
|
ulong base1; /* base of bank 1 */
|
||
|
|
ulong copymode; /* 0 is copy on write, 1 is copy on reference */
|
||
|
|
ulong ialloc; /* max interrupt time allocation in bytes */
|
||
|
|
ulong pipeqsize; /* size in bytes of pipe queues */
|
||
|
|
int nuart; /* number of uart devices */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Label
|
||
|
|
{
|
||
|
|
jmp_buf buf;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Ref
|
||
|
|
{
|
||
|
|
Lock lk;
|
||
|
|
long ref;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Rendez
|
||
|
|
{
|
||
|
|
Lock lk;
|
||
|
|
Proc *p;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct RWlock /* changed from kernel */
|
||
|
|
{
|
||
|
|
int readers;
|
||
|
|
Lock lk;
|
||
|
|
QLock x;
|
||
|
|
QLock k;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Talarm
|
||
|
|
{
|
||
|
|
Lock lk;
|
||
|
|
Proc *list;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Alarms
|
||
|
|
{
|
||
|
|
QLock lk;
|
||
|
|
Proc *head;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Access types in namec & channel flags
|
||
|
|
*/
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
Aaccess, /* as in stat, wstat */
|
||
|
|
Abind, /* for left-hand-side of bind */
|
||
|
|
Atodir, /* as in chdir */
|
||
|
|
Aopen, /* for i/o */
|
||
|
|
Amount, /* to be mounted or mounted upon */
|
||
|
|
Acreate, /* is to be created */
|
||
|
|
Aremove, /* will be removed by caller */
|
||
|
|
|
||
|
|
COPEN = 0x0001, /* for i/o */
|
||
|
|
CMSG = 0x0002, /* the message channel for a mount */
|
||
|
|
/*rsc CCREATE = 0x0004, /* permits creation if c->mnt */
|
||
|
|
CCEXEC = 0x0008, /* close on exec */
|
||
|
|
CFREE = 0x0010, /* not in use */
|
||
|
|
CRCLOSE = 0x0020, /* remove on close */
|
||
|
|
CCACHE = 0x0080, /* client cache */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* flag values */
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
BINTR = (1<<0),
|
||
|
|
BFREE = (1<<1),
|
||
|
|
Bipck = (1<<2), /* ip checksum */
|
||
|
|
Budpck = (1<<3), /* udp checksum */
|
||
|
|
Btcpck = (1<<4), /* tcp checksum */
|
||
|
|
Bpktck = (1<<5), /* packet checksum */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Block
|
||
|
|
{
|
||
|
|
Block* next;
|
||
|
|
Block* list;
|
||
|
|
uchar* rp; /* first unconsumed byte */
|
||
|
|
uchar* wp; /* first empty byte */
|
||
|
|
uchar* lim; /* 1 past the end of the buffer */
|
||
|
|
uchar* base; /* start of the buffer */
|
||
|
|
void (*free)(Block*);
|
||
|
|
ushort flag;
|
||
|
|
ushort checksum; /* IP checksum of complete packet (minus media header) */
|
||
|
|
};
|
||
|
|
#define BLEN(s) ((s)->wp - (s)->rp)
|
||
|
|
#define BALLOC(s) ((s)->lim - (s)->base)
|
||
|
|
|
||
|
|
struct Chan
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
Chan* next; /* allocation */
|
||
|
|
Chan* link;
|
||
|
|
vlong offset; /* in file */
|
||
|
|
ushort type;
|
||
|
|
ulong dev;
|
||
|
|
ushort mode; /* read/write */
|
||
|
|
ushort flag;
|
||
|
|
Qid qid;
|
||
|
|
int fid; /* for devmnt */
|
||
|
|
ulong iounit; /* chunk size for i/o; 0==default */
|
||
|
|
Mhead* umh; /* mount point that derived Chan; used in unionread */
|
||
|
|
Chan* umc; /* channel in union; held for union read */
|
||
|
|
QLock umqlock; /* serialize unionreads */
|
||
|
|
int uri; /* union read index */
|
||
|
|
int dri; /* devdirread index */
|
||
|
|
ulong mountid;
|
||
|
|
Mntcache *mcp; /* Mount cache pointer */
|
||
|
|
Mnt *mux; /* Mnt for clients using me for messages */
|
||
|
|
void* aux;
|
||
|
|
Qid pgrpid; /* for #p/notepg */
|
||
|
|
ulong mid; /* for ns in devproc */
|
||
|
|
Chan* mchan; /* channel to mounted server */
|
||
|
|
Qid mqid; /* qid of root of mount point */
|
||
|
|
Session*session;
|
||
|
|
Cname *name;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Cname
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
int alen; /* allocated length */
|
||
|
|
int len; /* strlen(s) */
|
||
|
|
char *s;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Dev
|
||
|
|
{
|
||
|
|
int dc;
|
||
|
|
char* name;
|
||
|
|
|
||
|
|
void (*reset)(void);
|
||
|
|
void (*init)(void);
|
||
|
|
void (*shutdown)(void);
|
||
|
|
Chan* (*attach)(char*);
|
||
|
|
Walkqid* (*walk)(Chan*, Chan*, char**, int);
|
||
|
|
int (*stat)(Chan*, uchar*, int);
|
||
|
|
Chan* (*open)(Chan*, int);
|
||
|
|
void (*create)(Chan*, char*, int, ulong);
|
||
|
|
void (*close)(Chan*);
|
||
|
|
long (*read)(Chan*, void*, long, vlong);
|
||
|
|
Block* (*bread)(Chan*, long, ulong);
|
||
|
|
long (*write)(Chan*, void*, long, vlong);
|
||
|
|
long (*bwrite)(Chan*, Block*, ulong);
|
||
|
|
void (*remove)(Chan*);
|
||
|
|
int (*wstat)(Chan*, uchar*, int);
|
||
|
|
void (*power)(int); /* power mgt: power(1) => on, power (0) => off */
|
||
|
|
int (*config)(int, char*, DevConf*); // returns nil on error
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Dirtab
|
||
|
|
{
|
||
|
|
char name[KNAMELEN];
|
||
|
|
Qid qid;
|
||
|
|
vlong length;
|
||
|
|
long perm;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Walkqid
|
||
|
|
{
|
||
|
|
Chan *clone;
|
||
|
|
int nqid;
|
||
|
|
Qid qid[1];
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
NSMAX = 1000,
|
||
|
|
NSLOG = 7,
|
||
|
|
NSCACHE = (1<<NSLOG),
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Mntwalk /* state for /proc/#/ns */
|
||
|
|
{
|
||
|
|
int cddone;
|
||
|
|
ulong id;
|
||
|
|
Mhead* mh;
|
||
|
|
Mount* cm;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Mount
|
||
|
|
{
|
||
|
|
ulong mountid;
|
||
|
|
Mount* next;
|
||
|
|
Mhead* head;
|
||
|
|
Mount* copy;
|
||
|
|
Mount* order;
|
||
|
|
Chan* to; /* channel replacing channel */
|
||
|
|
int mflag;
|
||
|
|
char *spec;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Mhead
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
RWlock lock;
|
||
|
|
Chan* from; /* channel mounted upon */
|
||
|
|
Mount* mount; /* what's mounted upon it */
|
||
|
|
Mhead* hash; /* Hash chain */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Mnt
|
||
|
|
{
|
||
|
|
Lock lk;
|
||
|
|
/* references are counted using c->ref; channels on this mount point incref(c->mchan) == Mnt.c */
|
||
|
|
Chan *c; /* Channel to file service */
|
||
|
|
Proc *rip; /* Reader in progress */
|
||
|
|
Mntrpc *queue; /* Queue of pending requests on this channel */
|
||
|
|
ulong id; /* Multiplexer id for channel check */
|
||
|
|
Mnt *list; /* Free list */
|
||
|
|
int flags; /* cache */
|
||
|
|
int msize; /* data + IOHDRSZ */
|
||
|
|
char *version; /* 9P version */
|
||
|
|
Queue *q; /* input queue */
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
NUser, /* note provided externally */
|
||
|
|
NExit, /* deliver note quietly */
|
||
|
|
NDebug, /* print debug message */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Note
|
||
|
|
{
|
||
|
|
char msg[ERRMAX];
|
||
|
|
int flag; /* whether system posted it */
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
RENDLOG = 5,
|
||
|
|
RENDHASH = 1<<RENDLOG, /* Hash to lookup rendezvous tags */
|
||
|
|
MNTLOG = 5,
|
||
|
|
MNTHASH = 1<<MNTLOG, /* Hash to walk mount table */
|
||
|
|
NFD = 100, /* per process file descriptors */
|
||
|
|
PGHLOG = 9,
|
||
|
|
PGHSIZE = 1<<PGHLOG, /* Page hash for image lookup */
|
||
|
|
};
|
||
|
|
#define REND(p,s) ((p)->rendhash[(s)&((1<<RENDLOG)-1)])
|
||
|
|
#define MOUNTH(p,qid) ((p)->mnthash[(qid).path&((1<<MNTLOG)-1)])
|
||
|
|
|
||
|
|
struct Pgrp
|
||
|
|
{
|
||
|
|
Ref ref; /* also used as a lock when mounting */
|
||
|
|
int noattach;
|
||
|
|
ulong pgrpid;
|
||
|
|
QLock debug; /* single access via devproc.c */
|
||
|
|
RWlock ns; /* Namespace n read/one write lock */
|
||
|
|
Mhead *mnthash[MNTHASH];
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Rgrp
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
Proc *rendhash[RENDHASH]; /* Rendezvous tag hash */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Egrp
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
RWlock lk;
|
||
|
|
Evalue **ent;
|
||
|
|
int nent;
|
||
|
|
int ment;
|
||
|
|
ulong path; /* qid.path of next Evalue to be allocated */
|
||
|
|
ulong vers; /* of Egrp */
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Evalue
|
||
|
|
{
|
||
|
|
char *name;
|
||
|
|
char *value;
|
||
|
|
int len;
|
||
|
|
Evalue *link;
|
||
|
|
Qid qid;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Fgrp
|
||
|
|
{
|
||
|
|
Ref ref;
|
||
|
|
Chan **fd;
|
||
|
|
int nfd; /* number allocated */
|
||
|
|
int maxfd; /* highest fd in use */
|
||
|
|
int exceed; /* debugging */
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
DELTAFD = 20, /* incremental increase in Fgrp.fd's */
|
||
|
|
NERR = 20
|
||
|
|
};
|
||
|
|
|
||
|
|
typedef uvlong Ticks;
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
Running,
|
||
|
|
Rendezvous,
|
||
|
|
Wakeme,
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Proc
|
||
|
|
{
|
||
|
|
uint state;
|
||
|
|
uint mach;
|
||
|
|
|
||
|
|
ulong pid;
|
||
|
|
ulong parentpid;
|
||
|
|
|
||
|
|
Pgrp *pgrp; /* Process group for namespace */
|
||
|
|
Fgrp *fgrp; /* File descriptor group */
|
||
|
|
Rgrp *rgrp;
|
||
|
|
|
||
|
|
Lock rlock; /* sync sleep/wakeup with postnote */
|
||
|
|
Rendez *r; /* rendezvous point slept on */
|
||
|
|
Rendez sleep; /* place for syssleep/debug */
|
||
|
|
int notepending; /* note issued but not acted on */
|
||
|
|
int kp; /* true if a kernel process */
|
||
|
|
|
||
|
|
ulong rendtag; /* Tag for rendezvous */
|
||
|
|
ulong rendval; /* Value for rendezvous */
|
||
|
|
Proc *rendhash; /* Hash list for tag values */
|
||
|
|
|
||
|
|
int nerrlab;
|
||
|
|
Label errlab[NERR];
|
||
|
|
char user[KNAMELEN];
|
||
|
|
char *syserrstr; /* last error from a system call, errbuf0 or 1 */
|
||
|
|
char *errstr; /* reason we're unwinding the error stack, errbuf1 or 0 */
|
||
|
|
char errbuf0[ERRMAX];
|
||
|
|
char errbuf1[ERRMAX];
|
||
|
|
char genbuf[128]; /* buffer used e.g. for last name element from namec */
|
||
|
|
char text[KNAMELEN];
|
||
|
|
|
||
|
|
Chan *slash;
|
||
|
|
Chan *dot;
|
||
|
|
|
||
|
|
Proc *qnext;
|
||
|
|
|
||
|
|
void (*fn)(void*);
|
||
|
|
void *arg;
|
||
|
|
|
||
|
|
char oproc[1024]; /* reserved for os */
|
||
|
|
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
PRINTSIZE = 256,
|
||
|
|
MAXCRYPT = 127,
|
||
|
|
NUMSIZE = 12, /* size of formatted number */
|
||
|
|
MB = (1024*1024),
|
||
|
|
READSTR = 1000, /* temporary buffer size for device reads */
|
||
|
|
};
|
||
|
|
|
||
|
|
extern char* conffile;
|
||
|
|
extern int cpuserver;
|
||
|
|
extern Dev* devtab[];
|
||
|
|
extern char *eve;
|
||
|
|
extern char hostdomain[];
|
||
|
|
extern uchar initcode[];
|
||
|
|
extern Queue* kbdq;
|
||
|
|
extern Queue* kprintoq;
|
||
|
|
extern Ref noteidalloc;
|
||
|
|
extern Palloc palloc;
|
||
|
|
extern Queue *serialoq;
|
||
|
|
extern char* statename[];
|
||
|
|
extern int nsyscall;
|
||
|
|
extern char *sysname;
|
||
|
|
extern uint qiomaxatomic;
|
||
|
|
extern Conf conf;
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
LRESPROF = 3,
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* action log
|
||
|
|
*/
|
||
|
|
struct Log {
|
||
|
|
Lock lk;
|
||
|
|
int opens;
|
||
|
|
char* buf;
|
||
|
|
char *end;
|
||
|
|
char *rptr;
|
||
|
|
int len;
|
||
|
|
int nlog;
|
||
|
|
int minread;
|
||
|
|
|
||
|
|
int logmask; /* mask of things to debug */
|
||
|
|
|
||
|
|
QLock readq;
|
||
|
|
Rendez readr;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Logflag {
|
||
|
|
char* name;
|
||
|
|
int mask;
|
||
|
|
};
|
||
|
|
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
NCMDFIELD = 128
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Cmdbuf
|
||
|
|
{
|
||
|
|
char *buf;
|
||
|
|
char **f;
|
||
|
|
int nf;
|
||
|
|
};
|
||
|
|
|
||
|
|
struct Cmdtab
|
||
|
|
{
|
||
|
|
int index; /* used by client to switch on result */
|
||
|
|
char *cmd; /* command name */
|
||
|
|
int narg; /* expected #args; 0 ==> variadic */
|
||
|
|
};
|
||
|
|
|
||
|
|
/* queue state bits, Qmsg, Qcoalesce, and Qkick can be set in qopen */
|
||
|
|
enum
|
||
|
|
{
|
||
|
|
/* Queue.state */
|
||
|
|
Qstarve = (1<<0), /* consumer starved */
|
||
|
|
Qmsg = (1<<1), /* message stream */
|
||
|
|
Qclosed = (1<<2), /* queue has been closed/hungup */
|
||
|
|
Qflow = (1<<3), /* producer flow controlled */
|
||
|
|
Qcoalesce = (1<<4), /* coallesce packets on read */
|
||
|
|
Qkick = (1<<5), /* always call the kick routine after qwrite */
|
||
|
|
};
|
||
|
|
|
||
|
|
#define DEVDOTDOT -1
|
||
|
|
|
||
|
|
extern Proc *_getproc(void);
|
||
|
|
extern void _setproc(Proc*);
|
||
|
|
#define up (_getproc())
|