diff options
| author | Wei Liu <wei.liu2@citrix.com> | 2013-05-17 03:26:11 +0400 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2013-05-18 05:23:07 +0400 |
| commit | b103f358d9f6f58658f1a6dc08912ab921dd86f1 (patch) | |
| tree | 5f35cbec030e789a1261676f579cb1b57b236021 /drivers/net/xen-netback/netback.c | |
| parent | f1db320ec5788d5fcc05c0285bd0980319185497 (diff) | |
| download | linux-b103f358d9f6f58658f1a6dc08912ab921dd86f1.tar.xz | |
xen-netback: enable user to unload netback module
This patch enables user to unload netback module, which is useful when user
wants to upgrade to a newer netback module without rebooting the host.
Netfront cannot handle netback removal event. As we cannot fix all possible
frontends we add module get / put along with vif get / put to avoid
mis-unloading of netback. To unload netback module, user needs to shutdown all
VMs or migrate them to another host or unplug all vifs before hand.
Signed-off-by: Wei Liu <wei.liu2@citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>¬
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/xen-netback/netback.c')
| -rw-r--r-- | drivers/net/xen-netback/netback.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/drivers/net/xen-netback/netback.c b/drivers/net/xen-netback/netback.c index 295a9c267df4..2d9477fd900f 100644 --- a/drivers/net/xen-netback/netback.c +++ b/drivers/net/xen-netback/netback.c @@ -1949,5 +1949,25 @@ failed_init: module_init(netback_init); +static void __exit netback_fini(void) +{ + int i, j; + + xenvif_xenbus_fini(); + + for (i = 0; i < xen_netbk_group_nr; i++) { + struct xen_netbk *netbk = &xen_netbk[i]; + del_timer_sync(&netbk->net_timer); + kthread_stop(netbk->task); + for (j = 0; j < MAX_PENDING_REQS; j++) { + if (netbk->mmap_pages[i]) + __free_page(netbk->mmap_pages[i]); + } + } + + vfree(xen_netbk); +} +module_exit(netback_fini); + MODULE_LICENSE("Dual BSD/GPL"); MODULE_ALIAS("xen-backend:vif"); |