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    Subject[RFC 2.6.10 1/22] xfrm: Add direction information to xfrm_state
    # This is a BitKeeper generated diff -Nru style patch.
    #
    # ChangeSet
    # 2004/12/30 00:27:15-05:00 dave@thedillows.org
    # Add direction information to xfrm_state. This will be needed to
    # offload xfrm processing to the NIC.
    #
    # Signed-off-by: David Dillow <dave@thedillows.org>
    #
    # net/xfrm/xfrm_state.c
    # 2004/12/30 00:25:42-05:00 dave@thedillows.org +5 -0
    # Add direction information to xfrm_state. This will be needed to
    # offload xfrm processing to the NIC.
    #
    # Signed-off-by: David Dillow <dave@thedillows.org>
    #
    # net/ipv6/xfrm6_state.c
    # 2004/12/30 00:25:42-05:00 dave@thedillows.org +9 -0
    # Place holder for adding IPv6 direction mapping routine.
    #
    # net/ipv4/xfrm4_state.c
    # 2004/12/30 00:25:42-05:00 dave@thedillows.org +10 -0
    # Add direction information to xfrm_state. This will be needed to
    # offload xfrm processing to the NIC.
    #
    # Signed-off-by: David Dillow <dave@thedillows.org>
    #
    # include/net/xfrm.h
    # 2004/12/30 00:25:42-05:00 dave@thedillows.org +10 -0
    # Add direction information to xfrm_state. This will be needed to
    # offload xfrm processing to the NIC.
    #
    # Signed-off-by: David Dillow <dave@thedillows.org>
    #
    diff -Nru a/include/net/xfrm.h b/include/net/xfrm.h
    --- a/include/net/xfrm.h 2004-12-30 01:12:08 -05:00
    +++ b/include/net/xfrm.h 2004-12-30 01:12:08 -05:00
    @@ -146,6 +146,9 @@
    /* Private data of this transformer, format is opaque,
    * interpreted by xfrm_type methods. */
    void *data;
    +
    + /* Intended direction of this state, used for offloading */
    + int dir;
    };

    enum {
    @@ -157,6 +160,12 @@
    XFRM_STATE_DEAD
    };

    +enum {
    + XFRM_STATE_DIR_UNKNOWN,
    + XFRM_STATE_DIR_IN,
    + XFRM_STATE_DIR_OUT,
    +};
    +
    struct xfrm_type;
    struct xfrm_dst;
    struct xfrm_policy_afinfo {
    @@ -194,6 +203,7 @@
    struct xfrm_state *(*find_acq)(u8 mode, u32 reqid, u8 proto,
    xfrm_address_t *daddr, xfrm_address_t *saddr,
    int create);
    + void (*map_direction)(struct xfrm_state *xfrm);
    };

    extern int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo);
    diff -Nru a/net/ipv4/xfrm4_state.c b/net/ipv4/xfrm4_state.c
    --- a/net/ipv4/xfrm4_state.c 2004-12-30 01:12:08 -05:00
    +++ b/net/ipv4/xfrm4_state.c 2004-12-30 01:12:08 -05:00
    @@ -106,12 +106,22 @@
    return x0;
    }

    +static void
    +__xfrm4_map_direction(struct xfrm_state *x)
    +{
    + if (inet_addr_type(x->id.daddr.a4) == RTN_LOCAL)
    + x->dir = XFRM_STATE_DIR_IN;
    + else
    + x->dir = XFRM_STATE_DIR_OUT;
    +}
    +
    static struct xfrm_state_afinfo xfrm4_state_afinfo = {
    .family = AF_INET,
    .lock = RW_LOCK_UNLOCKED,
    .init_tempsel = __xfrm4_init_tempsel,
    .state_lookup = __xfrm4_state_lookup,
    .find_acq = __xfrm4_find_acq,
    + .map_direction = __xfrm4_map_direction,
    };

    void __init xfrm4_state_init(void)
    diff -Nru a/net/ipv6/xfrm6_state.c b/net/ipv6/xfrm6_state.c
    --- a/net/ipv6/xfrm6_state.c 2004-12-30 01:12:08 -05:00
    +++ b/net/ipv6/xfrm6_state.c 2004-12-30 01:12:08 -05:00
    @@ -116,12 +116,21 @@
    return x0;
    }

    +static void
    +__xfrm6_map_direction(struct xfrm_state *x)
    +{
    + /* XXX This needs to be implemented by someone who knows
    + * IPv6 better then I.
    + */
    +}
    +
    static struct xfrm_state_afinfo xfrm6_state_afinfo = {
    .family = AF_INET6,
    .lock = RW_LOCK_UNLOCKED,
    .init_tempsel = __xfrm6_init_tempsel,
    .state_lookup = __xfrm6_state_lookup,
    .find_acq = __xfrm6_find_acq,
    + .map_direction = __xfrm6_map_direction,
    };

    void __init xfrm6_state_init(void)
    diff -Nru a/net/xfrm/xfrm_state.c b/net/xfrm/xfrm_state.c
    --- a/net/xfrm/xfrm_state.c 2004-12-30 01:12:08 -05:00
    +++ b/net/xfrm/xfrm_state.c 2004-12-30 01:12:08 -05:00
    @@ -186,6 +186,7 @@
    x->lft.soft_packet_limit = XFRM_INF;
    x->lft.hard_byte_limit = XFRM_INF;
    x->lft.hard_packet_limit = XFRM_INF;
    + x->dir = XFRM_STATE_DIR_UNKNOWN;
    spin_lock_init(&x->lock);
    }
    return x;
    @@ -404,6 +405,8 @@
    if (unlikely(afinfo == NULL))
    return -EAFNOSUPPORT;

    + afinfo->map_direction(x);
    +
    spin_lock_bh(&xfrm_state_lock);

    x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
    @@ -451,6 +454,8 @@
    afinfo = xfrm_state_get_afinfo(x->props.family);
    if (unlikely(afinfo == NULL))
    return -EAFNOSUPPORT;
    +
    + afinfo->map_direction(x);

    spin_lock_bh(&xfrm_state_lock);
    x1 = afinfo->state_lookup(&x->id.daddr, x->id.spi, x->id.proto);
    -
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