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Jason Wang authored
Current tuntap makes use of the socket receive queue as its tx queue. To implement multiple tx queues for tuntap and enable the ability of adding and removing queues during workload, the first step is to move the socket related structures to tun_file. Then we could let multiple fds/sockets to be attached to the tuntap. This patch removes tun_sock and moves socket related structures from tun_sock or tun_struct to tun_file. Two exceptions are tap_filter and sock_fprog, they are still kept in tun_structure since they are used to filter packets for the net device instead of per transmit queue (at least I see no requirements for them). After those changes, socket were created and destroyed during file open and close (instead of device creation and destroy), the socket structures could be dereferenced from tun_file instead of the file of tun_struct structure itself. For persisent device, since we purge during datching and wouldn't queue any packets when no interface were attached, there's no behaviod changes before and after this patch, so the changes were transparent to the userspace. To keep the attributes such as sndbuf, socket filter and vnet header, those would be re-initialize after a new interface were attached to an persist device. Signed-off-by:
Jason Wang <jasowang@redhat.com> Signed-off-by:
David S. Miller <davem@davemloft.net>
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