[XFRM] Optimize SA dumping
Same comments as in "[XFRM] Optimize policy dumping" The numbers are (20K SAs):
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@ -1099,7 +1099,7 @@ int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
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void *data)
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{
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int i;
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struct xfrm_state *x;
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struct xfrm_state *x, *last = NULL;
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struct hlist_node *entry;
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int count = 0;
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int err = 0;
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@ -1107,24 +1107,22 @@ int xfrm_state_walk(u8 proto, int (*func)(struct xfrm_state *, int, void*),
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spin_lock_bh(&xfrm_state_lock);
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for (i = 0; i <= xfrm_state_hmask; i++) {
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hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
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if (xfrm_id_proto_match(x->id.proto, proto))
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count++;
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if (!xfrm_id_proto_match(x->id.proto, proto))
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continue;
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if (last) {
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err = func(last, count, data);
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if (err)
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goto out;
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}
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last = x;
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count++;
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}
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}
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if (count == 0) {
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err = -ENOENT;
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goto out;
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}
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for (i = 0; i <= xfrm_state_hmask; i++) {
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hlist_for_each_entry(x, entry, xfrm_state_bydst+i, bydst) {
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if (!xfrm_id_proto_match(x->id.proto, proto))
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continue;
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err = func(x, --count, data);
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if (err)
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goto out;
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}
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}
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err = func(last, 0, data);
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out:
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spin_unlock_bh(&xfrm_state_lock);
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return err;
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