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Differential D10385 Diff 38027 head/sys/geom/geom_subr.c

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head/sys/geom/geom_subr.c

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* Access-check with delta values. The question asked is "can provider * Access-check with delta values. The question asked is "can provider
* "cp" change the access counters by the relative amounts dc[rwe] ?" * "cp" change the access counters by the relative amounts dc[rwe] ?"
*/ */
int int
g_access(struct g_consumer *cp, int dcr, int dcw, int dce) g_access(struct g_consumer *cp, int dcr, int dcw, int dce)
{ {
struct g_provider *pp; struct g_provider *pp;
int pr,pw,pe; int pw, pe;
int error; int error;
g_topology_assert(); g_topology_assert();
G_VALID_CONSUMER(cp); G_VALID_CONSUMER(cp);
pp = cp->provider; pp = cp->provider;
KASSERT(pp != NULL, ("access but not attached")); KASSERT(pp != NULL, ("access but not attached"));
G_VALID_PROVIDER(pp); G_VALID_PROVIDER(pp);
Show All 14 Linesg_access(struct g_consumer *cp, int dcr, int dcw, int dce)
if (cp->geom->spoiled != NULL && (cp->flags & G_CF_SPOILED) && if (cp->geom->spoiled != NULL && (cp->flags & G_CF_SPOILED) &&
(dcr > 0 || dcw > 0 || dce > 0)) (dcr > 0 || dcw > 0 || dce > 0))
return (ENXIO); return (ENXIO);
/* /*
* Figure out what counts the provider would have had, if this * Figure out what counts the provider would have had, if this
* consumer had (r0w0e0) at this time. * consumer had (r0w0e0) at this time.
*/ */
pr = pp->acr - cp->acr;
pw = pp->acw - cp->acw; pw = pp->acw - cp->acw;
pe = pp->ace - cp->ace; pe = pp->ace - cp->ace;
g_trace(G_T_ACCESS, g_trace(G_T_ACCESS,
"open delta:[r%dw%de%d] old:[r%dw%de%d] provider:[r%dw%de%d] %p(%s)", "open delta:[r%dw%de%d] old:[r%dw%de%d] provider:[r%dw%de%d] %p(%s)",
dcr, dcw, dce, dcr, dcw, dce,
cp->acr, cp->acw, cp->ace, cp->acr, cp->acw, cp->ace,
pp->acr, pp->acw, pp->ace, pp->acr, pp->acw, pp->ace,
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