Add and implement the msize_limit callback for the Xen transport. The limit is calculated using XEN_FLEX_RING_SIZE() based on the negotiated ring_order. For the theoretical maximum ring_order of 9, this results in a maximum 'msize' of 1048576 bytes (1 MiB).
Signed-off-by: Christian Schoenebeck <[email protected]> --- hw/9pfs/xen-9p-backend.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/hw/9pfs/xen-9p-backend.c b/hw/9pfs/xen-9p-backend.c index ca0fff5fa9..94654022fe 100644 --- a/hw/9pfs/xen-9p-backend.c +++ b/hw/9pfs/xen-9p-backend.c @@ -250,12 +250,19 @@ static void xen_9pfs_push_and_notify(V9fsPDU *pdu) qemu_bh_schedule(ring->bh); } +static size_t xen_9p_msize_limit(V9fsState *s) +{ + Xen9pfsDev *xen_9pfs = container_of(s, Xen9pfsDev, state); + return XEN_FLEX_RING_SIZE(xen_9pfs->rings[0].ring_order); +} + static const V9fsTransport xen_9p_transport = { .pdu_vmarshal = xen_9pfs_pdu_vmarshal, .pdu_vunmarshal = xen_9pfs_pdu_vunmarshal, .init_in_iov_from_pdu = xen_9pfs_init_in_iov_from_pdu, .init_out_iov_from_pdu = xen_9pfs_init_out_iov_from_pdu, .push_and_notify = xen_9pfs_push_and_notify, + .msize_limit = xen_9p_msize_limit, }; static int xen_9pfs_init(struct XenLegacyDevice *xendev) -- 2.47.3
