• Nicolas Dichtel's avatar
    ipsec: add support of limited SA dump · d3623099
    Nicolas Dichtel authored
    The goal of this patch is to allow userland to dump only a part of SA by
    specifying a filter during the dump.
    The kernel is in charge to filter SA, this avoids to generate useless netlink
    traffic (it save also some cpu cycles). This is particularly useful when there
    is a big number of SA set on the system.
    Note that I removed the union in struct xfrm_state_walk to fix a problem on arm.
    struct netlink_callback->args is defined as a array of 6 long and the first long
    is used in xfrm code to flag the cb as initialized. Hence, we must have:
    sizeof(struct xfrm_state_walk) <= sizeof(long) * 5.
    With the union, it was false on arm (sizeof(struct xfrm_state_walk) was
    sizeof(long) * 7), due to the padding.
    In fact, whatever the arch is, this union seems useless, there will be always
    padding after it. Removing it will not increase the size of this struct (and
    reduce it on arm).
    Signed-off-by: default avatarNicolas Dichtel <nicolas.dichtel@6wind.com>
    Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
xfrm.h 47.6 KB