Differential D24968 Diff 72717 head/sys/geom/label/g_label.c

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head/sys/geom/label/g_label.c

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#include <sys/ctype.h>		#include <sys/ctype.h>
#include <sys/malloc.h>		#include <sys/malloc.h>
#include <sys/libkern.h>		#include <sys/libkern.h>
#include <sys/sbuf.h>		#include <sys/sbuf.h>
#include <sys/stddef.h>		#include <sys/stddef.h>
#include <sys/sysctl.h>		#include <sys/sysctl.h>
#include <geom/geom.h>		#include <geom/geom.h>
#include <geom/geom_dbg.h>		#include <geom/geom_dbg.h>
		#include <geom/geom_int.h>
#include <geom/geom_slice.h>		#include <geom/geom_slice.h>
#include <geom/label/g_label.h>		#include <geom/label/g_label.h>

FEATURE(geom_label, "GEOM labeling support");		FEATURE(geom_label, "GEOM labeling support");

SYSCTL_DECL(_kern_geom);		SYSCTL_DECL(_kern_geom);
SYSCTL_NODE(_kern_geom, OID_AUTO, label, CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,		SYSCTL_NODE(_kern_geom, OID_AUTO, label, CTLFLAG_RW \| CTLFLAG_MPSAFE, 0,
"GEOM_LABEL stuff");		"GEOM_LABEL stuff");
▲ Show 20 Lines • Show All 282 Lines • ▼ Show 20 Lines	g_label_access_taste(struct g_provider *pp __unused, int dr __unused,
return (EOPNOTSUPP);		return (EOPNOTSUPP);
}		}

static struct g_geom *		static struct g_geom *
g_label_taste(struct g_class mp, struct g_provider pp, int flags __unused)		g_label_taste(struct g_class mp, struct g_provider pp, int flags __unused)
{		{
struct g_label_metadata md;		struct g_label_metadata md;
struct g_consumer *cp;		struct g_consumer *cp;
		struct g_class *clsp;
struct g_geom *gp;		struct g_geom *gp;
int i;		int i;
		bool changed;

g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);		g_trace(G_T_TOPOLOGY, "%s(%s, %s)", __func__, mp->name, pp->name);
g_topology_assert();		g_topology_assert();

G_LABEL_DEBUG(2, "Tasting %s.", pp->name);		G_LABEL_DEBUG(2, "Tasting %s.", pp->name);

/* Skip providers that are already open for writing. */
if (pp->acw > 0)
return (NULL);

if (strcmp(pp->geom->class->name, mp->name) == 0)		if (strcmp(pp->geom->class->name, mp->name) == 0)
return (NULL);		return (NULL);

gp = g_new_geomf(mp, "label:taste");		gp = g_new_geomf(mp, "label:taste");
gp->start = g_label_start_taste;		gp->start = g_label_start_taste;
gp->access = g_label_access_taste;		gp->access = g_label_access_taste;
gp->orphan = g_label_orphan_taste;		gp->orphan = g_label_orphan_taste;
cp = g_new_consumer(gp);		cp = g_new_consumer(gp);
Show All 19 Lines	do {
* metadata.		* metadata.
*/		*/
if (md.md_version < 2)		if (md.md_version < 2)
md.md_provsize = pp->mediasize;		md.md_provsize = pp->mediasize;

if (md.md_provsize != pp->mediasize)		if (md.md_provsize != pp->mediasize)
break;		break;

		/* Skip providers that are already open for writing. */
		if (pp->acw > 0) {
		g_access(cp, -1, 0, 0);
		goto end;
		}

g_label_create(NULL, mp, pp, md.md_label, G_LABEL_DIR,		g_label_create(NULL, mp, pp, md.md_label, G_LABEL_DIR,
pp->mediasize - pp->sectorsize);		pp->mediasize - pp->sectorsize);
} while (0);		} while (0);
		changed = false;
for (i = 0; g_labels[i] != NULL; i++) {		for (i = 0; g_labels[i] != NULL; i++) {
char label[128];		char label[128];

if (g_labels[i]->ld_enabled == 0)		if (g_labels[i]->ld_enabled == 0)
continue;		continue;
g_topology_unlock();		g_topology_unlock();
g_labels[i]->ld_taste(cp, label, sizeof(label));		g_labels[i]->ld_taste(cp, label, sizeof(label));
g_label_mangle_name(label, sizeof(label));		g_label_mangle_name(label, sizeof(label));
g_topology_lock();		g_topology_lock();
if (label[0] == '\0')		if (label[0] == '\0')
continue;		continue;
g_label_create(NULL, mp, pp, label, g_labels[i]->ld_dir,		if (!g_label_is_name_ok(label)) {
pp->mediasize);		G_LABEL_DEBUG(0,
		"%s contains suspicious label, skipping.",
		pp->name);
		G_LABEL_DEBUG(1, "%s suspicious label is: %s",
		pp->name, label);
		continue;
		}
		g_provider_add_alias(pp, "%s/%s", g_labels[i]->ld_dir, label);
		changed = true;
		}
		/*
		* Force devfs interface to retaste the provider, to catch the new
		* alias(es).
		*/
		if (changed) {
		LIST_FOREACH(clsp, &g_classes, class) {
		if (strcmp(clsp->name, "DEV") != 0)
		continue;
		clsp->taste(clsp, pp, 0);
		break;
		}
}		}
g_access(cp, -1, 0, 0);		g_access(cp, -1, 0, 0);
end:		end:
g_detach(cp);		g_detach(cp);
g_destroy_consumer(cp);		g_destroy_consumer(cp);
g_destroy_geom(gp);		g_destroy_geom(gp);
return (NULL);		return (NULL);
}		}
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