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Use unit number allocation functions for GEOM minor numbers.

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This commit is contained in:
Poul-Henning Kamp 2004-10-25 12:28:28 +00:00
parent e4fea39e9e
commit 8c24ef5f78
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=136946
2 changed files with 18 additions and 11 deletions
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21
sys/geom/geom_dev.c
View file

@ -67,20 +67,31 @@ static struct cdevsw g_dev_cdevsw = {
.d_ioctl = g_dev_ioctl,
.d_strategy = g_dev_strategy,
.d_name = "g_dev",
.d_maj = GEOM_MAJOR,
.d_flags = D_DISK | D_TRACKCLOSE,
};
static g_taste_t g_dev_taste;
static g_orphan_t g_dev_orphan;
static g_init_t g_dev_init;
static struct g_class g_dev_class = {
.name = "DEV",
.version = G_VERSION,
.taste = g_dev_taste,
.orphan = g_dev_orphan,
.init = g_dev_init,
};
static struct unrhdr *unithdr; /* Locked by topology */
static void
g_dev_init(struct g_class *mp)
{
/* XXX: should have a #define MAX_UNIT_MINOR */
unithdr = new_unrhdr(0, 0xffffff);
}
void
g_dev_print(void)
{
@ -115,9 +126,9 @@ g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
{
struct g_geom *gp;
struct g_consumer *cp;
static int unit = GEOM_MINOR_PROVIDERS;
int error;
struct cdev *dev;
u_int unit;
g_trace(G_T_TOPOLOGY, "dev_taste(%s,%s)", mp->name, pp->name);
g_topology_assert();
@ -133,9 +144,10 @@ g_dev_taste(struct g_class *mp, struct g_provider *pp, int insist __unused)
* XXX: I'm not 100% sure we can call make_dev(9) without Giant
* yet. Once we can, we don't need to drop topology here either.
*/
unit = alloc_unr(unithdr);
g_topology_unlock();
mtx_lock(&Giant);
dev = make_dev(&g_dev_cdevsw, unit2minor(unit++),
dev = make_dev(&g_dev_cdevsw, unit2minor(unit),
UID_ROOT, GID_OPERATOR, 0640, gp->name);
if (pp->flags & G_PF_CANDELETE)
dev->si_flags |= SI_CANDELETE;
@ -389,6 +401,7 @@ g_dev_orphan(struct g_consumer *cp)
{
struct g_geom *gp;
struct cdev *dev;
u_int unit;
g_topology_assert();
gp = cp->geom;
@ -400,7 +413,9 @@ g_dev_orphan(struct g_consumer *cp)
set_dumper(NULL);
/* Destroy the struct cdev *so we get no more requests */
unit = dev2unit(dev);
destroy_dev(dev);
free_unr(unithdr, unit);
/* Wait for the cows to come home */
while (cp->nstart != cp->nend)

8
sys/geom/geom_int.h
View file

@ -51,14 +51,6 @@ extern int g_debugflags;
#define G_F_DISKIOCTL 64
#define G_F_CTLDUMP 128
/*
* We actually have a number of drivers sharing the same major number
* so we coordinate the major/minor usage here
*/
#define GEOM_MAJOR 4
#define GEOM_MINOR_STATS 0
#define GEOM_MINOR_PROVIDERS 10
/* geom_dump.c */
void g_confxml(void *, int flag);
void g_conf_specific(struct sbuf *sb, struct g_class *mp, struct g_geom *gp, struct g_provider *pp, struct g_consumer *cp);