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Add disk_resize(), to make it possible for the disk drivers such as da(4)

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to notify GEOM about LUN size change.

Reviewed by:	mav (earlier version)
Sponsored by:	FreeBSD Foundation
This commit is contained in:
Edward Tomasz Napierala 2012-07-07 21:28:31 +00:00
parent dc604f0cf6
commit bc97ce36f7
2 changed files with 43 additions and 0 deletions
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42
sys/geom/geom_disk.c
View File

@ -48,6 +48,7 @@ __FBSDID("$FreeBSD$");
#include <sys/malloc.h>
#include <sys/sbuf.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <sys/devicestat.h>
#include <machine/md_var.h>
@ -65,6 +66,7 @@ struct g_disk_softc {
struct sysctl_oid *sysctl_tree;
char led[64];
uint32_t state;
struct task resize_task;
};
static struct mtx g_disk_done_mtx;
@ -444,6 +446,27 @@ g_disk_dumpconf(struct sbuf *sb, const char *indent, struct g_geom *gp, struct g
}
}
static void
g_disk_resize_task(void *context, int pending)
{
struct g_geom *gp;
struct g_provider *pp;
struct disk *dp;
struct g_disk_softc *sc;
sc = (struct g_disk_softc *)context;
dp = sc->dp;
gp = dp->d_geom;
LIST_FOREACH(pp, &gp->provider, provider) {
if (pp->sectorsize != 0 &&
pp->sectorsize != dp->d_sectorsize)
g_wither_provider(pp, ENXIO);
else
g_resize_provider(pp, dp->d_mediasize);
}
}
static void
g_disk_create(void *arg, int flag)
{
@ -484,6 +507,7 @@ g_disk_create(void *arg, int flag)
CTLFLAG_RW | CTLFLAG_TUN, sc->led, sizeof(sc->led),
"LED name");
}
TASK_INIT(&sc->resize_task, 0, g_disk_resize_task, sc);
pp->private = sc;
dp->d_geom = gp;
g_error_provider(pp, 0);
@ -635,6 +659,24 @@ disk_attr_changed(struct disk *dp, const char *attr, int flag)
(void)g_attr_changed(pp, attr, flag);
}
void
disk_resize(struct disk *dp)
{
struct g_geom *gp;
struct g_disk_softc *sc;
int error;
gp = dp->d_geom;
if (gp == NULL)
return;
sc = gp->softc;
error = taskqueue_enqueue(taskqueue_thread, &sc->resize_task);
KASSERT(error == 0, ("taskqueue_enqueue(9) failed."));
}
static void
g_kern_disks(void *p, int flag __unused)
{

1
sys/geom/geom_disk.h
View File

@ -109,6 +109,7 @@ void disk_create(struct disk *disk, int version);
void disk_destroy(struct disk *disk);
void disk_gone(struct disk *disk);
void disk_attr_changed(struct disk *dp, const char *attr, int flag);
void disk_resize(struct disk *dp);
#define DISK_VERSION_00 0x58561059
#define DISK_VERSION_01 0x5856105a