Differential D23110 Diff 66846 sys/dev/virtio/block/virtio_blk.c

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	struct sysctl_oid_list *child;	struct sysctl_oid_list *child;

	dev = sc->vtblk_dev;	dev = sc->vtblk_dev;
	ctx = device_get_sysctl_ctx(dev);	ctx = device_get_sysctl_ctx(dev);
	tree = device_get_sysctl_tree(dev);	tree = device_get_sysctl_tree(dev);
	child = SYSCTL_CHILDREN(tree);	child = SYSCTL_CHILDREN(tree);

	SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "writecache_mode",	SYSCTL_ADD_PROC(ctx, child, OID_AUTO, "writecache_mode",
	CTLTYPE_INT \| CTLFLAG_RW, sc, 0, vtblk_write_cache_sysctl,	CTLTYPE_INT \| CTLFLAG_RW \| CTLFLAG_NEEDGIANT, sc, 0,
		vtblk_write_cache_sysctl,
	"I", "Write cache mode (writethrough (0) or writeback (1))");	"I", "Write cache mode (writethrough (0) or writeback (1))");
	}	}

	static int	static int
	vtblk_tunable_int(struct vtblk_softc sc, const char knob, int def)	vtblk_tunable_int(struct vtblk_softc sc, const char knob, int def)
	{	{
	char path[64];	char path[64];

	snprintf(path, sizeof(path),	snprintf(path, sizeof(path),
	"hw.vtblk.%d.%s", device_get_unit(sc->vtblk_dev), knob);	"hw.vtblk.%d.%s", device_get_unit(sc->vtblk_dev), knob);
	TUNABLE_INT_FETCH(path, &def);	TUNABLE_INT_FETCH(path, &def);

	return (def);	return (def);
	}	}
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