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Changing provider size is not really supported by GEOM, but doing so when

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provider is closed should be ok.

When administrator requests to change ZVOL size do it immediately if ZVOL
is closed or do it on last ZVOL close.

PR:		kern/136942
Requested by:	Bernard Buri <bsd@ask-us.at>
MFC after:	1 week
This commit is contained in:
Pawel Jakub Dawidek 2009-09-07 14:16:50 +00:00
parent 481208a815
commit 841bcfea21
1 changed files with 16 additions and 5 deletions
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21
sys/cddl/contrib/opensolaris/uts/common/fs/zfs/zvol.c
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@ -153,7 +153,22 @@ static int zvol_dump_init(zvol_state_t *zv, boolean_t resize);
static void
zvol_size_changed(zvol_state_t *zv, major_t maj)
{
struct g_provider *pp;
g_topology_assert();
pp = zv->zv_provider;
if (pp == NULL)
return;
if (zv->zv_volsize == pp->mediasize)
return;
/*
* Changing provider size is not really supported by GEOM, but it
* should be safe when provider is closed.
*/
if (zv->zv_total_opens > 0)
return;
pp->mediasize = zv->zv_volsize;
}
int
@ -263,6 +278,7 @@ zvol_access(struct g_provider *pp, int acr, int acw, int ace)
}
zv->zv_total_opens += acr + acw + ace;
zvol_size_changed(zv, 0);
mutex_exit(&zvol_state_lock);
@ -1072,11 +1088,6 @@ zvol_set_volblocksize(const char *name, uint64_t volblocksize)
if (error == ENOTSUP)
error = EBUSY;
dmu_tx_commit(tx);
/* XXX: Not supported. */
#if 0
if (error == 0)
zv->zv_provider->sectorsize = zc->zc_volblocksize;
#endif
}
end:
mutex_exit(&zvol_state_lock);