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