Rearrange some of the GEOM debugging tools to be more structured.
Retire g_sanity() and corresponding debugflag (0x8)
Retire g_{stall,release}_events().
Under #ifdef DIAGNOSTIC:
Make g_valid_obj() an official function and have it return an an
non-zero integer which indicates the kind of object when found.
Implement G_VALID_{CLASS,GEOM,CONSUMER,PROVIDER}() macros based
on g_valid_obj().
Sprinkle calls to these macros liberally over the infrastructure.
Always check that we do not free a live object.
This commit is contained in:
Poul-Henning Kamp
parent
c88f8102e3
commit
3d1d5bc3c3
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=126798
@ -221,13 +221,29 @@ int g_handleattr_off_t(struct bio *bp, const char *attribute, off_t val);
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struct g_consumer * g_new_consumer(struct g_geom *gp);
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struct g_geom * g_new_geomf(struct g_class *mp, const char *fmt, ...);
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struct g_provider * g_new_providerf(struct g_geom *gp, const char *fmt, ...);
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void g_sanity(void const *ptr);
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void g_spoil(struct g_provider *pp, struct g_consumer *cp);
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int g_std_access(struct g_provider *pp, int dr, int dw, int de);
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void g_std_done(struct bio *bp);
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void g_std_spoiled(struct g_consumer *cp);
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void g_wither_geom(struct g_geom *gp, int error);
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#ifdef DIAGNOSTIC
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int g_valid_obj(void const *ptr);
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#define G_VALID_CLASS(foo) \
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KASSERT(g_valid_obj(foo) == 1, ("%p is not a g_class", foo))
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#define G_VALID_GEOM(foo) \
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KASSERT(g_valid_obj(foo) == 2, ("%p is not a g_geom", foo))
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#define G_VALID_CONSUMER(foo) \
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KASSERT(g_valid_obj(foo) == 3, ("%p is not a g_consumer", foo))
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#define G_VALID_PROVIDER(foo) \
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KASSERT(g_valid_obj(foo) == 4, ("%p is not a g_provider", foo))
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#else
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#define G_VALID_CLASS(foo) do { } while (0)
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#define G_VALID_GEOM(foo) do { } while (0)
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#define G_VALID_CONSUMER(foo) do { } while (0)
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#define G_VALID_PROVIDER(foo) do { } while (0)
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#endif
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int g_modevent(module_t, int, void *);
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/* geom_io.c */
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@ -258,16 +274,17 @@ g_malloc(int size, int flags)
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void *p;
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p = malloc(size, M_GEOM, flags);
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g_sanity(p);
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/* printf("malloc(%d, %x) -> %p\n", size, flags, p); */
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return (p);
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}
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static __inline void
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g_free(void *ptr)
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{
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g_sanity(ptr);
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/* printf("free(%p)\n", ptr); */
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#ifdef DIAGNOSTIC
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KASSERT(g_valid_obj(ptr) == 0,
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("g_free(%p) of live object, type %d", ptr, g_valid_obj(ptr)));
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#endif
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free(ptr, M_GEOM);
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}
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@ -281,19 +298,16 @@ extern struct sx topology_lock;
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#define g_topology_unlock() \
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do { \
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g_sanity(NULL); \
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sx_xunlock(&topology_lock); \
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} while (0)
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#define g_topology_assert() \
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do { \
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g_sanity(NULL); \
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sx_assert(&topology_lock, SX_XLOCKED); \
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} while (0)
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#define g_topology_assert_not() \
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do { \
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g_sanity(NULL); \
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sx_assert(&topology_lock, SX_UNLOCKED); \
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} while (0)
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@ -273,7 +273,6 @@ g_trace(int level, const char *fmt, ...)
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{
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va_list ap;
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g_sanity(NULL);
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if (!(g_debugflags & level))
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return;
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va_start(ap, fmt);
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@ -59,7 +59,6 @@ static struct event_tailq_head g_events = TAILQ_HEAD_INITIALIZER(g_events);
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static u_int g_pending_events;
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static TAILQ_HEAD(,g_provider) g_doorstep = TAILQ_HEAD_INITIALIZER(g_doorstep);
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static struct mtx g_eventlock;
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static struct sx g_eventstall;
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#define G_N_EVENTREFS 20
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@ -83,24 +82,11 @@ g_waitidle(void)
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tsleep(&g_pending_events, PPAUSE, "g_waitidle", hz/5);
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}
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void
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g_stall_events(void)
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{
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sx_xlock(&g_eventstall);
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}
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void
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g_release_events(void)
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{
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sx_xunlock(&g_eventstall);
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}
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void
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g_orphan_provider(struct g_provider *pp, int error)
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{
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/* G_VALID_PROVIDER(pp) We likely lack topology lock */
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g_trace(G_T_TOPOLOGY, "g_orphan_provider(%p(%s), %d)",
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pp, pp->name, error);
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KASSERT(error != 0,
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@ -128,8 +114,9 @@ g_orphan_register(struct g_provider *pp)
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struct g_consumer *cp, *cp2;
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int wf;
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g_trace(G_T_TOPOLOGY, "g_orphan_register(%s)", pp->name);
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g_topology_assert();
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G_VALID_PROVIDER(pp);
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g_trace(G_T_TOPOLOGY, "g_orphan_register(%s)", pp->name);
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wf = pp->flags & G_PF_WITHER;
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pp->flags &= ~G_PF_WITHER;
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@ -166,13 +153,14 @@ one_event(void)
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struct g_event *ep;
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struct g_provider *pp;
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sx_xlock(&g_eventstall);
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g_topology_lock();
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for (;;) {
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mtx_lock(&g_eventlock);
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pp = TAILQ_FIRST(&g_doorstep);
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if (pp != NULL)
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if (pp != NULL) {
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G_VALID_PROVIDER(pp);
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TAILQ_REMOVE(&g_doorstep, pp, orphan);
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}
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mtx_unlock(&g_eventlock);
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if (pp == NULL)
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break;
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@ -183,7 +171,6 @@ one_event(void)
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if (ep == NULL) {
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mtx_unlock(&g_eventlock);
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g_topology_unlock();
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sx_xunlock(&g_eventstall);
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return (0);
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}
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TAILQ_REMOVE(&g_events, ep, events);
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@ -201,7 +188,6 @@ one_event(void)
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if (g_pending_events == 0)
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wakeup(&g_pending_events);
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g_topology_unlock();
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sx_xunlock(&g_eventstall);
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return (1);
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}
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@ -337,5 +323,4 @@ g_event_init()
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{
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mtx_init(&g_eventlock, "GEOM orphanage", NULL, MTX_DEF);
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sx_init(&g_eventstall, "GEOM event stalling");
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}
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@ -44,7 +44,7 @@ extern int g_debugflags;
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* 1 G_T_TOPOLOGY
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* 2 G_T_BIO
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* 4 G_T_ACCESS
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* 8 Enable sanity checks
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* 8 (unused)
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* 16 Allow footshooting on rank#1 providers
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* 32 G_T_DETAILS
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*/
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@ -68,8 +68,6 @@ void g_conftxt(void *, int flag);
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/* geom_event.c */
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void g_event_init(void);
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void g_run_events(void);
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void g_stall_events(void);
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void g_release_events(void);
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/* geom_subr.c */
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extern struct class_list_head g_classes;
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@ -57,8 +57,6 @@ struct class_list_head g_classes = LIST_HEAD_INITIALIZER(g_classes);
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static struct g_tailq_head geoms = TAILQ_HEAD_INITIALIZER(geoms);
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char *g_wait_event, *g_wait_up, *g_wait_down, *g_wait_sim;
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static int g_valid_obj(void const *ptr);
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struct g_hh00 {
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struct g_class *mp;
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int error;
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@ -125,6 +123,7 @@ g_unload_class(void *arg, int flag)
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g_topology_assert();
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hh = arg;
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mp = hh->mp;
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G_VALID_CLASS(mp);
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g_trace(G_T_TOPOLOGY, "g_unload_class(%s)", mp->name);
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/*
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@ -216,7 +215,7 @@ g_new_geomf(struct g_class *mp, const char *fmt, ...)
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struct sbuf *sb;
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g_topology_assert();
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KASSERT(g_valid_obj(mp), ("g_new_geom_f() on alien class %p", mp));
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G_VALID_CLASS(mp);
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sb = sbuf_new(NULL, NULL, 0, SBUF_AUTOEXTEND);
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va_start(ap, fmt);
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sbuf_vprintf(sb, fmt, ap);
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@ -239,8 +238,9 @@ void
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g_destroy_geom(struct g_geom *gp)
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{
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g_trace(G_T_TOPOLOGY, "g_destroy_geom(%p(%s))", gp, gp->name);
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g_topology_assert();
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G_VALID_GEOM(gp);
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g_trace(G_T_TOPOLOGY, "g_destroy_geom(%p(%s))", gp, gp->name);
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KASSERT(LIST_EMPTY(&gp->consumer),
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("g_destroy_geom(%s) with consumer(s) [%p]",
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gp->name, LIST_FIRST(&gp->consumer)));
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@ -255,7 +255,7 @@ g_destroy_geom(struct g_geom *gp)
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}
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/*
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* This function is called (repeatedly) until has withered away.
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* This function is called (repeatedly) until the has withered away.
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*/
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void
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g_wither_geom(struct g_geom *gp, int error)
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@ -264,11 +264,12 @@ g_wither_geom(struct g_geom *gp, int error)
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struct g_consumer *cp, *cp2;
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static int once_is_enough;
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g_topology_assert();
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G_VALID_GEOM(gp);
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if (once_is_enough)
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return;
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once_is_enough = 1;
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g_trace(G_T_TOPOLOGY, "g_wither_geom(%p(%s))", gp, gp->name);
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g_topology_assert();
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if (!(gp->flags & G_GEOM_WITHER)) {
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gp->flags |= G_GEOM_WITHER;
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LIST_FOREACH(pp, &gp->provider, provider)
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@ -299,6 +300,7 @@ g_new_consumer(struct g_geom *gp)
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struct g_consumer *cp;
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g_topology_assert();
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G_VALID_GEOM(gp);
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KASSERT(!(gp->flags & G_GEOM_WITHER),
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("g_new_consumer on WITHERing geom(%s) (class %s)",
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gp->name, gp->class->name));
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@ -319,8 +321,9 @@ g_destroy_consumer(struct g_consumer *cp)
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{
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struct g_geom *gp;
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g_trace(G_T_TOPOLOGY, "g_destroy_consumer(%p)", cp);
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g_topology_assert();
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G_VALID_CONSUMER(cp);
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g_trace(G_T_TOPOLOGY, "g_destroy_consumer(%p)", cp);
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KASSERT (cp->provider == NULL, ("g_destroy_consumer but attached"));
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KASSERT (cp->acr == 0, ("g_destroy_consumer with acr"));
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KASSERT (cp->acw == 0, ("g_destroy_consumer with acw"));
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@ -348,6 +351,7 @@ g_new_provider_event(void *arg, int flag)
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if (g_shutdown)
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return;
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pp = arg;
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G_VALID_PROVIDER(pp);
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LIST_FOREACH(mp, &g_classes, class) {
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if (mp->taste == NULL)
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continue;
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@ -359,14 +363,6 @@ g_new_provider_event(void *arg, int flag)
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continue;
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mp->taste(mp, pp, 0);
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g_topology_assert();
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/*
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* XXX: Bandaid for 5.2-RELEASE
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* XXX: DO NOT REPLICATE THIS CODE!
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*/
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if (!g_valid_obj(pp)) {
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printf("g_provider %p disappeared while tasting\n", pp);
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return;
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}
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}
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}
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@ -379,6 +375,7 @@ g_new_providerf(struct g_geom *gp, const char *fmt, ...)
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va_list ap;
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g_topology_assert();
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G_VALID_GEOM(gp);
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KASSERT(gp->start != NULL,
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("new provider on geom(%s) without ->start (class %s)",
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gp->name, gp->class->name));
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@ -408,6 +405,7 @@ void
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g_error_provider(struct g_provider *pp, int error)
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{
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/* G_VALID_PROVIDER(pp); We may not have g_topology */
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pp->error = error;
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}
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@ -435,6 +433,7 @@ g_destroy_provider(struct g_provider *pp)
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struct g_geom *gp;
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g_topology_assert();
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G_VALID_PROVIDER(pp);
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KASSERT(LIST_EMPTY(&pp->consumers),
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("g_destroy_provider but attached"));
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KASSERT (pp->acr == 0, ("g_destroy_provider with acr"));
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@ -474,6 +473,7 @@ redo_rank(struct g_geom *gp)
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int n, m;
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g_topology_assert();
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G_VALID_GEOM(gp);
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/* Invalidate this geoms rank and move it to the tail */
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gp1 = TAILQ_NEXT(gp, geoms);
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@ -523,6 +523,8 @@ g_attach(struct g_consumer *cp, struct g_provider *pp)
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int error;
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g_topology_assert();
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G_VALID_CONSUMER(cp);
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G_VALID_PROVIDER(pp);
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KASSERT(cp->provider == NULL, ("attach but attached"));
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cp->provider = pp;
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LIST_INSERT_HEAD(&pp->consumers, cp, consumers);
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@ -540,9 +542,9 @@ g_detach(struct g_consumer *cp)
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{
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struct g_provider *pp;
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g_trace(G_T_TOPOLOGY, "g_detach(%p)", cp);
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KASSERT(cp != (void*)0xd0d0d0d0, ("ARGH!"));
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g_topology_assert();
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G_VALID_CONSUMER(cp);
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g_trace(G_T_TOPOLOGY, "g_detach(%p)", cp);
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KASSERT(cp->provider != NULL, ("detach but not attached"));
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KASSERT(cp->acr == 0, ("detach but nonzero acr"));
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KASSERT(cp->acw == 0, ("detach but nonzero acw"));
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@ -573,12 +575,14 @@ g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
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int pr,pw,pe;
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int error;
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g_topology_assert();
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G_VALID_CONSUMER(cp);
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pp = cp->provider;
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G_VALID_PROVIDER(pp);
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g_trace(G_T_ACCESS, "g_access(%p(%s), %d, %d, %d)",
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cp, pp->name, dcr, dcw, dce);
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g_topology_assert();
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KASSERT(cp->provider != NULL, ("access but not attached"));
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KASSERT(cp->acr + dcr >= 0, ("access resulting in negative acr"));
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KASSERT(cp->acw + dcw >= 0, ("access resulting in negative acw"));
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@ -688,10 +692,12 @@ g_handleattr(struct bio *bp, const char *attribute, void *val, int len)
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}
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int
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g_std_access(struct g_provider *pp __unused,
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g_std_access(struct g_provider *pp,
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int dr __unused, int dw __unused, int de __unused)
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{
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g_topology_assert();
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G_VALID_PROVIDER(pp);
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return (0);
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}
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@ -718,8 +724,9 @@ g_std_spoiled(struct g_consumer *cp)
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struct g_geom *gp;
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struct g_provider *pp;
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g_trace(G_T_TOPOLOGY, "g_std_spoiled(%p)", cp);
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g_topology_assert();
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G_VALID_CONSUMER(cp);
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g_trace(G_T_TOPOLOGY, "g_std_spoiled(%p)", cp);
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g_detach(cp);
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gp = cp->geom;
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LIST_FOREACH(pp, &gp->provider, provider)
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@ -752,6 +759,7 @@ g_spoil_event(void *arg, int flag)
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if (flag == EV_CANCEL)
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return;
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pp = arg;
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G_VALID_PROVIDER(pp);
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for (cp = LIST_FIRST(&pp->consumers); cp != NULL; cp = cp2) {
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cp2 = LIST_NEXT(cp, consumers);
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if (!cp->spoiled)
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@ -770,6 +778,8 @@ g_spoil(struct g_provider *pp, struct g_consumer *cp)
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struct g_consumer *cp2;
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g_topology_assert();
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G_VALID_PROVIDER(pp);
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G_VALID_CONSUMER(cp);
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LIST_FOREACH(cp2, &pp->consumers, consumers) {
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if (cp2 == cp)
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@ -798,11 +808,16 @@ g_getattr__(const char *attr, struct g_consumer *cp, void *var, int len)
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return (0);
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}
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#ifdef DIAGNOSTIC
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/*
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* XXX: Bandaid for 5.2.
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* XXX: DO NOT EVEN THINK ABOUT CALLING THIS FUNCTION!
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* This function walks (topologically unsafely) the mesh and return a
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* non-zero integer if it finds the argument pointer is an object.
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* The return value indicates which type of object it is belived to be.
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* If topology is not locked, this function is potentially dangerous,
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* but since it is for debugging purposes and can be useful for instance
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* from DDB, we do not assert topology lock is held.
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*/
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static int
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int
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g_valid_obj(void const *ptr)
|
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{
|
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struct g_class *mp;
|
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@ -810,50 +825,20 @@ g_valid_obj(void const *ptr)
|
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struct g_consumer *cp;
|
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struct g_provider *pp;
|
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|
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g_topology_assert();
|
||||
LIST_FOREACH(mp, &g_classes, class) {
|
||||
if (ptr == mp)
|
||||
return (1);
|
||||
LIST_FOREACH(gp, &mp->geom, geom) {
|
||||
if (ptr == gp)
|
||||
return (1);
|
||||
return (2);
|
||||
LIST_FOREACH(cp, &gp->consumer, consumer)
|
||||
if (ptr == cp)
|
||||
return (1);
|
||||
return (3);
|
||||
LIST_FOREACH(pp, &gp->provider, provider)
|
||||
if (ptr == pp)
|
||||
return (1);
|
||||
return (4);
|
||||
}
|
||||
}
|
||||
return(0);
|
||||
}
|
||||
|
||||
/*
|
||||
* Check if the given pointer is a live object
|
||||
*/
|
||||
|
||||
void
|
||||
g_sanity(void const *ptr)
|
||||
{
|
||||
struct g_class *mp;
|
||||
struct g_geom *gp;
|
||||
struct g_consumer *cp;
|
||||
struct g_provider *pp;
|
||||
|
||||
if (!(g_debugflags & 0x8))
|
||||
return;
|
||||
LIST_FOREACH(mp, &g_classes, class) {
|
||||
KASSERT(mp != ptr, ("Ptr is live class"));
|
||||
LIST_FOREACH(gp, &mp->geom, geom) {
|
||||
KASSERT(gp != ptr, ("Ptr is live geom"));
|
||||
KASSERT(gp->name != ptr, ("Ptr is live geom's name"));
|
||||
LIST_FOREACH(cp, &gp->consumer, consumer) {
|
||||
KASSERT(cp != ptr, ("Ptr is live consumer"));
|
||||
}
|
||||
LIST_FOREACH(pp, &gp->provider, provider) {
|
||||
KASSERT(pp != ptr, ("Ptr is live provider"));
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
#endif
|
||||
|
||||
Loading…
Reference in New Issue
Block a user