git: 4826b224097b - stable/13 - netlink: cleanup netlink_writer code

The branch stable/13 has been updated by melifaro:

URL: https://cgit.FreeBSD.org/src/commit/?id=4826b224097b857a161e3910afa77b89eee55c76

commit 4826b224097b857a161e3910afa77b89eee55c76
Author:     Alexander V. Chernikov <melifaro@FreeBSD.org>
AuthorDate: 2023-03-07 17:42:27 +0000
Commit:     Alexander V. Chernikov <melifaro@FreeBSD.org>
CommitDate: 2023-04-08 19:05:26 +0000

    netlink: cleanup netlink_writer code
    
    * Remove unused nlattr_add_nla() - that's a duplicate of nlattr_add_raw().
    * Calculate alignment only once in nlmsg_reserve_data_raw()
    
    MFC after:      2 weeks
    
    (cherry picked from commit 5c8277ec2588a660f126e1a9866cd65f59336c51)
---
 sys/netlink/netlink_message_writer.h | 31 ++++++-------------------------
 1 file changed, 6 insertions(+), 25 deletions(-)

diff --git a/sys/netlink/netlink_message_writer.h b/sys/netlink/netlink_message_writer.h
index bb4bb759251a..13acf5add559 100644
--- a/sys/netlink/netlink_message_writer.h
+++ b/sys/netlink/netlink_message_writer.h
@@ -124,17 +124,19 @@ nlattr_set_len(const struct nl_writer *nw, int off)
 static inline void *
 nlmsg_reserve_data_raw(struct nl_writer *nw, size_t sz)
 {
-        if (__predict_false(nw->offset + NETLINK_ALIGN(sz) > nw->alloc_len)) {
-		if (!nlmsg_refill_buffer(nw, NETLINK_ALIGN(sz)))
+	sz = NETLINK_ALIGN(sz);
+
+        if (__predict_false(nw->offset + sz > nw->alloc_len)) {
+		if (!nlmsg_refill_buffer(nw, sz))
 			return (NULL);
         }
 
         void *data_ptr = &nw->data[nw->offset];
-        nw->offset += NLMSG_ALIGN(sz);
+        nw->offset += sz;
 
         return (data_ptr);
 }
-#define nlmsg_reserve_object(_ns, _t)	((_t *)nlmsg_reserve_data_raw(_ns, NLA_ALIGN(sizeof(_t))))
+#define nlmsg_reserve_object(_ns, _t)	((_t *)nlmsg_reserve_data_raw(_ns, sizeof(_t)))
 #define nlmsg_reserve_data(_ns, _sz, _t)	((_t *)nlmsg_reserve_data_raw(_ns, _sz))
 
 static inline int
@@ -163,27 +165,6 @@ _nlmsg_reserve_attr(struct nl_writer *nw, uint16_t nla_type, uint16_t sz)
 }
 #define	nlmsg_reserve_attr(_ns, _at, _t)	((_t *)_nlmsg_reserve_attr(_ns, _at, NLA_ALIGN(sizeof(_t))))
 
-static inline bool
-nlattr_add_nla(struct nl_writer *nw, const struct nlattr *nla_src)
-{
-	MPASS(nla_src->nla_len >= sizeof(struct nlattr));
-
-	int required_len = NLA_ALIGN(nla_src->nla_len);
-        if (__predict_false(nw->offset + required_len > nw->alloc_len)) {
-		if (!nlmsg_refill_buffer(nw, required_len))
-			return (false);
-	}
-
-        struct nlattr *nla = (struct nlattr *)(&nw->data[nw->offset]);
-	if ((nla_src->nla_len % 4) != 0) {
-		/* clear padding bytes */
-		bzero((char *)nla + nla_src->nla_len - 4, 4);
-	}
-	memcpy(nla, nla_src, nla_src->nla_len);
-        nw->offset += required_len;
-	return (true);
-}
-
 static inline bool
 nlattr_add(struct nl_writer *nw, int attr_type, int attr_len, const void *data)
 {