Author: mav
Date: Tue Mar 26 07:55:24 2013
New Revision: 248722
URL: http://svnweb.freebsd.org/changeset/base/248722
Log:
geom_slice.c and its consumers like GEOM_LABEL are not touching the data
unless hotspots are used. Pass G_PF_ACCEPT_UNMAPPED flag through except
such rare cases (obsolete GEOM_SUNLABEL and GEOM_BSD).
Modified:
head/sys/geom/geom_slice.c
Modified: head/sys/geom/geom_slice.c
==============================================================================
--- head/sys/geom/geom_slice.c Tue Mar 26 05:58:49 2013 (r248721)
+++ head/sys/geom/geom_slice.c Tue Mar 26 07:55:24 2013 (r248722)
@@ -396,6 +396,8 @@ g_slice_config(struct g_geom *gp, u_int
pp->stripeoffset = pp2->stripeoffset + offset;
if (pp->stripesize > 0)
pp->stripeoffset %= pp->stripesize;
+ if (gsp->nhotspot == 0)
+ pp->flags |= pp2->flags & G_PF_ACCEPT_UNMAPPED;
if (0 && bootverbose)
printf("GEOM: Configure %s, start %jd length %jd end %jd\n",
pp->name, (intmax_t)offset, (intmax_t)length,
@@ -428,11 +430,17 @@ g_slice_conf_hot(struct g_geom *gp, u_in
{
struct g_slicer *gsp;
struct g_slice_hot *gsl, *gsl2;
+ struct g_provider *pp;
g_trace(G_T_TOPOLOGY, "g_slice_conf_hot(%s, idx: %d, off: %jd, len:
%jd)",
gp->name, idx, (intmax_t)offset, (intmax_t)length);
g_topology_assert();
gsp = gp->softc;
+ /* Deny unmapped I/O if hotspots are used. */
+ if (gsp->nhotspot == 0) {
+ LIST_FOREACH(pp, &gp->provider, provider)
+ pp->flags &= ~G_PF_ACCEPT_UNMAPPED;
+ }
gsl = gsp->hotspot;
if(idx >= gsp->nhotspot) {
gsl2 = g_malloc((idx + 1) * sizeof *gsl2, M_WAITOK | M_ZERO);
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