kernel/linux.git/include/uapi/linux/if_packet.h, branch v3.9.3Linux kernel stable tree (mirror)https://git.radix-linux.su/kernel/linux.git/atom?h=v3.9.32012-11-07T23:54:30+00:00packet: tx_ring: allow the user to choose tx data offset2012-11-07T23:54:30+00:00Paul ChaventPaul.Chavent@onera.fr2012-11-06T23:10:47+00:00urn:sha1:5920cd3a41f1aefc30e9ce86384fc2fe9f5fe0c0
The tx data offset of packet mmap tx ring used to be :
(TPACKET2_HDRLEN - sizeof(struct sockaddr_ll))
The problem is that, with SOCK_RAW socket, the payload (14 bytes after
the beginning of the user data) is misaligned.
This patch allows to let the user gives an offset for it's tx data if
he desires.
Set sock option PACKET_TX_HAS_OFF to 1, then specify in each frame of
your tx ring tp_net for SOCK_DGRAM, or tp_mac for SOCK_RAW.
Signed-off-by: Paul Chavent <paul.chavent@onera.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
UAPI: (Scripted) Disintegrate include/linux2012-10-13T09:46:48+00:00David Howellsdhowells@redhat.com2012-10-13T09:46:48+00:00urn:sha1:607ca46e97a1b6594b29647d98a32d545c24bdff
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Michael Kerrisk <mtk.manpages@gmail.com>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Acked-by: Dave Jones <davej@redhat.com>