1991/1011/port/pgrp.c (diff list | history)

1991/0806/sys/src/9/port/pgrp.c:28,33 – 1991/1011/sys/src/9/port/pgrp.c:28,34 (short | long | prev | next)
1990/0227		struct{ Lock; Mount *free;
1991/1011		Mhead *mhfree;
1990/0227		ulong mountid; }mountalloc;
1991/0806/sys/src/9/port/pgrp.c:39,53 – 1991/1011/sys/src/9/port/pgrp.c:40,54
1991/0705		Egrp *e, *ee; Fgrp *f, *fe; Mount *m, *em;
1991/1011		Mhead *hm, *hem;
1990/0227
1990/1110		pgrpalloc.arena = ialloc(conf.npgrp*sizeof(Pgrp), 0); pgrpalloc.free = pgrpalloc.arena;
1990/0227		p = pgrpalloc.free;
1990/0825		for(i=0; i<conf.npgrp; i++,p++){
1991/1011		for(i=0; i<conf.npgrp; i++,p++) {
1990/1110		p->index = i;
1990/0227		p->next = p+1; p->mtab = ialloc(conf.nmtab*sizeof(Mtab), 0); }
1990/0825		p[-1].next = 0;
1990/0227
1991/0806/sys/src/9/port/pgrp.c:64,75 – 1991/1011/sys/src/9/port/pgrp.c:65,70
1991/0705		for(f = fgrpalloc.free; f < fe; f++) f->next = f+1; f->next = 0;                  mountalloc.free = ialloc(conf.nmount*sizeof(Mount), 0); em = &mountalloc.free[conf.nmount-1]; for(m = mountalloc.free; m < em; m++)
1990/0227		m->next = m+1; m->next = 0; } Pgrp*
1991/0806/sys/src/9/port/pgrp.c:119,126 – 1991/1011/sys/src/9/port/pgrp.c:114,121
1991/0705		pgrpalloc.free = p->next; p->ref = 1; p->pgrpid = ++pgrpalloc.pgrpid; p->nmtab = 0;
1991/0806		memset(p->rendhash, 0, sizeof(p->rendhash));
1991/1011		memset(p->mnthash, 0, sizeof(p->mnthash));
1991/0705		unlock(&pgrpalloc); return p; }
1991/0806/sys/src/9/port/pgrp.c:202,219 – 1991/1011/sys/src/9/port/pgrp.c:197,218
1990/0227		void closepgrp(Pgrp *p) { int i; Mtab *m;
1991/1011		Mhead **h, **e, *f, *next;
1990/0227		if(decref(p) == 0){
1991/0212		qlock(&p->debug);
1990/1110		p->pgrpid = -1;
1990/0227		m = p->mtab; for(i=0; i<p->nmtab; i++,m++) if(m->c){ close(m->c); closemount(m->mnt);
1991/1011		e = &p->mnthash[MNTHASH]; for(h = p->mnthash; h < e; h++) { for(f = *h; f; f = next) { close(f->from); mountfree(f->mount); next = f->hash; mntheadfree(f);
1990/0227		}
1991/1011		}
1990/0227		lock(&pgrpalloc); p->next = pgrpalloc.free; pgrpalloc.free = p;
1991/0806/sys/src/9/port/pgrp.c:260,308 – 1991/1011/sys/src/9/port/pgrp.c:259,292
1991/0705
1990/0227		Mount* newmount(void)
1991/1011		newmount(Mhead *mh, Chan *to)
1990/0227		{ Mount *m;
1991/1011		Mount *m, *f, *e;
1990/0227		loop: lock(&mountalloc); if(m = mountalloc.free){ /* assign = */ mountalloc.free = m->next; m->ref = 1;
1990/0928		m->next = 0;
1990/0227		m->mountid = ++mountalloc.mountid;
1991/1011		for(;;) { lock(&mountalloc); if(m = mountalloc.free){ /* assign = */ mountalloc.free = m->next; m->mountid = ++mountalloc.mountid; unlock(&mountalloc); m->next = 0; m->head = mh; m->to = to; incref(to); return m; }
1990/0227		unlock(&mountalloc); return m; } unlock(&mountalloc); print("no mounts\n"); if(u == 0) panic("newmount"); u->p->state = Wakeme; alarm(1000, wakeme, u->p); sched(); goto loop; } void closemount(Mount *m) { lock(m); if(m->ref == 1){
1990/0321		if(m->c) close(m->c);
1990/0227		if(m->next) closemount(m->next); unlock(m);
1991/1011		m = (Mount*)VA(kmap(newpage(0, 0, 0))); e = &m[(BY2PG/sizeof(Mount))-1]; for(f = m; f < e; f++) f->next = f+1;
1990/0227		lock(&mountalloc); m->mountid = 0; m->next = mountalloc.free;
1991/1011		e->next = mountalloc.free;
1990/0227		mountalloc.free = m; unlock(&mountalloc); return; } m->ref--; unlock(m); } void
1991/0806/sys/src/9/port/pgrp.c:348,368 – 1991/1011/sys/src/9/port/pgrp.c:332,411
1991/0514		void pgrpcpy(Pgrp *to, Pgrp *from) { int i; Mtab *m;
1991/1011		Mhead **h, **e, *f, **l, *mh; Mount *n, *m, **link;
1991/0514		lock(from); memmove(to->user, from->user, NAMELEN); memmove(to->mtab, from->mtab, from->nmtab*sizeof(Mtab)); to->nmtab = from->nmtab; m = to->mtab; for(i=0; i<from->nmtab; i++,m++) if(m->c){ incref(m->c); lock(m->mnt); m->mnt->ref++; unlock(m->mnt);
1991/1011		rlock(&from->ns); e = &from->mnthash[MNTHASH]; for(h = from->mnthash; h < e; h++) { for(f = *h; f; f = f->hash) { mh = newmnthead(); mh->from = f->from; incref(mh->from); l = &MOUNTH(to, mh->from); mh->hash = *l; *l = mh; link = &mh->mount; for(m = f->mount; m; m = m->next) { n = newmount(mh, m->to); *link = n; link = &n->next; }
1991/0514		}
1991/1011		} runlock(&from->ns); }
1991/0514
1990/0227		unlock(from);
1991/1011		Mhead * newmnthead(void) { Mhead *mh, *f, *e; for(;;) { lock(&mountalloc); if(mh = mountalloc.mhfree) { /* Assign '=' */ mountalloc.mhfree = mh->hash; unlock(&mountalloc); mh->hash = 0; mh->mount = 0; return mh; } unlock(&mountalloc); mh = (Mhead*)VA(kmap(newpage(0, 0, 0))); e = &mh[(BY2PG/sizeof(Mhead))-1]; for(f = mh; f < e; f++) f->hash = f+1; lock(&mountalloc); e->hash = mountalloc.mhfree; mountalloc.mhfree = mh; unlock(&mountalloc); } } void mntheadfree(Mhead *mh) { lock(&mountalloc); mh->hash = mountalloc.mhfree; mountalloc.mhfree = mh; unlock(&mountalloc); } void mountfree(Mount *m) { Mount *f; for(f = m; f->next; f = f->next) close(f->to); close(f->to); lock(&mountalloc); f->next = mountalloc.free; mountalloc.free = m; unlock(&mountalloc);
1990/0227		}