[src-draft/trunk]: src/sys/net80211 Add an easy method for drivers to overrid...

[Martin Husemann <martin%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src-all/rev/81970f56e02f
branches:  trunk
changeset: 375813:81970f56e02f
user:      Martin Husemann <martin%NetBSD.org@localhost>
date:      Tue Sep 20 19:57:57 2022 +0200

description:
Add an easy method for drivers to override the size of the node structure

Drivers that use a custom node type (starting with ieee80211_node) can
simply set the desired size in the ic structure and do not have to
deal with allocation (and the more complex cleanup and deallocation).

diffstat:

 sys/net80211/ieee80211_node.c |  10 ++++++++++
 sys/net80211/ieee80211_var.h  |   3 +++
 2 files changed, 13 insertions(+), 0 deletions(-)

diffs (51 lines):

diff -r 6ea228804fb5 -r 81970f56e02f sys/net80211/ieee80211_node.c
--- a/sys/net80211/ieee80211_node.c     Tue Sep 20 18:47:53 2022 +0200
+++ b/sys/net80211/ieee80211_node.c     Tue Sep 20 19:57:57 2022 +0200
@@ -136,6 +136,7 @@ ieee80211_node_attach(struct ieee80211co
        taskqueue_enqueue_timeout(ic->ic_tq, &ic->ic_inact_task,
            IEEE80211_INACT_WAIT*hz);
 
+       ic->ic_node_size = sizeof(struct ieee80211_node);
        ic->ic_node_alloc = node_alloc;
        ic->ic_node_init = node_init;
        ic->ic_node_free = node_free;
@@ -1137,9 +1138,14 @@ static struct ieee80211_node *
 node_alloc(struct ieee80211vap *vap, const uint8_t macaddr[IEEE80211_ADDR_LEN])
 {
        struct ieee80211_node *ni;
+       struct ieee80211com *ic = vap->iv_ic;
 
        ni = (struct ieee80211_node *) IEEE80211_MZALLOC(
+#ifdef __NetBSD__
+           ic->ic_node_size,
+#else
            sizeof(struct ieee80211_node),
+#endif
            M_80211_NODE, IEEE80211_M_NOWAIT);
        return ni;
 }
@@ -1353,7 +1359,11 @@ node_free(struct ieee80211_node *ni)
        ic->ic_node_cleanup(ni);
        ieee80211_ies_cleanup(&ni->ni_ies);
        ieee80211_psq_cleanup(&ni->ni_psq);
+#ifdef __NetBSD__
+       IEEE80211_MFREE(ni, M_80211_NODE, ic->ic_node_size);
+#else
        IEEE80211_MFREE(ni, M_80211_NODE, sizeof(*ni));
+#endif
        ni = NULL;
 }
 
diff -r 6ea228804fb5 -r 81970f56e02f sys/net80211/ieee80211_var.h
--- a/sys/net80211/ieee80211_var.h      Tue Sep 20 18:47:53 2022 +0200
+++ b/sys/net80211/ieee80211_var.h      Tue Sep 20 19:57:57 2022 +0200
@@ -315,6 +315,9 @@ struct ieee80211com {
 
        /* Node state management */
 
+       /* Size of driver specific node type when using common alloc */
+       size_t ic_node_size;
+
        /* Allocate a new node */
        struct ieee80211_node*  (*ic_node_alloc)(struct ieee80211vap *,
                                    const uint8_t [IEEE80211_ADDR_LEN]);