Date: Wed, 23 Sep 2020 17:25:05 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r366082 - stable/12/sys/kern Message-ID: <202009231725.08NHP52p066981@repo.freebsd.org>
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Author: kib Date: Wed Sep 23 17:25:04 2020 New Revision: 366082 URL: https://svnweb.freebsd.org/changeset/base/366082 Log: MFC r365814: Fix fixjobc+orhpanage. Modified: stable/12/sys/kern/kern_proc.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/kern/kern_proc.c ============================================================================== --- stable/12/sys/kern/kern_proc.c Wed Sep 23 17:20:04 2020 (r366081) +++ stable/12/sys/kern/kern_proc.c Wed Sep 23 17:25:04 2020 (r366082) @@ -557,6 +557,35 @@ isjobproc(struct proc *q, struct pgrp *pgrp) q->p_pgrp->pg_session == pgrp->pg_session); } +static struct proc * +jobc_reaper(struct proc *p) +{ + struct proc *pp; + + sx_assert(&proctree_lock, SX_LOCKED); + + for (pp = p;;) { + pp = pp->p_reaper; + if (pp->p_reaper == pp || + (pp->p_treeflag & P_TREE_GRPEXITED) == 0) + return (pp); + } +} + +static struct proc * +jobc_parent(struct proc *p) +{ + struct proc *pp; + + sx_assert(&proctree_lock, SX_LOCKED); + + pp = proc_realparent(p); + if (pp->p_pptr == NULL || + (pp->p_treeflag & P_TREE_GRPEXITED) == 0) + return (pp); + return (jobc_reaper(pp)); +} + #ifdef INVARIANTS static void check_pgrp_jobc(struct pgrp *pgrp) @@ -573,7 +602,7 @@ check_pgrp_jobc(struct pgrp *pgrp) if ((q->p_treeflag & P_TREE_GRPEXITED) != 0 || q->p_pptr == NULL) continue; - if (isjobproc(q->p_pptr, pgrp)) + if (isjobproc(jobc_parent(q), pgrp)) cnt++; } KASSERT(pgrp->pg_jobc == cnt, ("pgrp %d %p pg_jobc %d cnt %d", @@ -695,6 +724,25 @@ pgadjustjobc(struct pgrp *pgrp, bool entering) PGRP_UNLOCK(pgrp); } +static void +fixjobc_enterpgrp_q(struct pgrp *pgrp, struct proc *p, struct proc *q, bool adj) +{ + struct pgrp *childpgrp; + bool future_jobc; + + sx_assert(&proctree_lock, SX_LOCKED); + + if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + return; + childpgrp = q->p_pgrp; + future_jobc = childpgrp != pgrp && + childpgrp->pg_session == pgrp->pg_session; + + if ((adj && !isjobproc(p, childpgrp) && future_jobc) || + (!adj && isjobproc(p, childpgrp) && !future_jobc)) + pgadjustjobc(childpgrp, adj); +} + /* * Adjust pgrp jobc counters when specified process changes process group. * We count the number of processes in each process group that "qualify" @@ -709,8 +757,6 @@ static void fixjobc_enterpgrp(struct proc *p, struct pgrp *pgrp) { struct proc *q; - struct pgrp *childpgrp; - bool future_jobc; sx_assert(&proctree_lock, SX_LOCKED); PROC_LOCK_ASSERT(p, MA_NOTOWNED); @@ -720,36 +766,49 @@ fixjobc_enterpgrp(struct proc *p, struct pgrp *pgrp) if (p->p_pgrp == pgrp) return; - if (isjobproc(p->p_pptr, pgrp)) + if (isjobproc(jobc_parent(p), pgrp)) pgadjustjobc(pgrp, true); LIST_FOREACH(q, &p->p_children, p_sibling) { - if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + if ((q->p_treeflag & P_TREE_ORPHANED) != 0) continue; - childpgrp = q->p_pgrp; - future_jobc = childpgrp != pgrp && - childpgrp->pg_session == pgrp->pg_session; - if (!isjobproc(p, childpgrp) && future_jobc) - pgadjustjobc(childpgrp, true); + fixjobc_enterpgrp_q(pgrp, p, q, true); } + LIST_FOREACH(q, &p->p_orphans, p_orphan) + fixjobc_enterpgrp_q(pgrp, p, q, true); - if (isjobproc(p->p_pptr, p->p_pgrp)) + if (isjobproc(jobc_parent(p), p->p_pgrp)) pgadjustjobc(p->p_pgrp, false); LIST_FOREACH(q, &p->p_children, p_sibling) { - if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + if ((q->p_treeflag & P_TREE_ORPHANED) != 0) continue; - childpgrp = q->p_pgrp; - future_jobc = childpgrp != pgrp && - childpgrp->pg_session == pgrp->pg_session; - if (isjobproc(p, childpgrp) && !future_jobc) - pgadjustjobc(childpgrp, false); + fixjobc_enterpgrp_q(pgrp, p, q, false); } + LIST_FOREACH(q, &p->p_orphans, p_orphan) + fixjobc_enterpgrp_q(pgrp, p, q, false); } static void +fixjobc_kill_q(struct proc *p, struct proc *q, bool adj) +{ + struct pgrp *childpgrp; + + sx_assert(&proctree_lock, SX_LOCKED); + + if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + return; + childpgrp = q->p_pgrp; + + if ((adj && isjobproc(jobc_reaper(q), childpgrp) && + !isjobproc(p, childpgrp)) || (!adj && !isjobproc(jobc_reaper(q), + childpgrp) && isjobproc(p, childpgrp))) + pgadjustjobc(childpgrp, adj); +} + +static void fixjobc_kill(struct proc *p) { struct proc *q; - struct pgrp *childpgrp, *pgrp; + struct pgrp *pgrp; sx_assert(&proctree_lock, SX_LOCKED); PROC_LOCK_ASSERT(p, MA_NOTOWNED); @@ -769,7 +828,7 @@ fixjobc_kill(struct proc *p) * Check p's parent to see whether p qualifies its own process * group; if so, adjust count for p's process group. */ - if (isjobproc(p->p_pptr, pgrp)) + if (isjobproc(jobc_parent(p), pgrp)) pgadjustjobc(pgrp, false); /* @@ -778,21 +837,19 @@ fixjobc_kill(struct proc *p) * adjust counts for children's process groups. */ LIST_FOREACH(q, &p->p_children, p_sibling) { - if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + if ((q->p_treeflag & P_TREE_ORPHANED) != 0) continue; - childpgrp = q->p_pgrp; - if (isjobproc(q->p_reaper, childpgrp) && - !isjobproc(p, childpgrp)) - pgadjustjobc(childpgrp, true); + fixjobc_kill_q(p, q, true); } + LIST_FOREACH(q, &p->p_orphans, p_orphan) + fixjobc_kill_q(p, q, true); LIST_FOREACH(q, &p->p_children, p_sibling) { - if ((q->p_treeflag & P_TREE_GRPEXITED) != 0) + if ((q->p_treeflag & P_TREE_ORPHANED) != 0) continue; - childpgrp = q->p_pgrp; - if (!isjobproc(q->p_reaper, childpgrp) && - isjobproc(p, childpgrp)) - pgadjustjobc(childpgrp, false); + fixjobc_kill_q(p, q, false); } + LIST_FOREACH(q, &p->p_orphans, p_orphan) + fixjobc_kill_q(p, q, false); } void
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