Eliminate struct mnl_ctx

The issue leading to this patch was that debug output in nft_mnl_talk()
bypasses the application-defined output_fp. While investigating, another
problem was discovered: Most of the ad-hoc defined mnl_ctx objects have
their field 'debug_mask' set to zero regardless of what netlink_ctx
contains (this affects non-batch code path only).

The intuitive solution to both of those issues required to extend
function parameters of all the non-batch functions as well as the common
nft_mnl_talk() one. Instead of complicating them even further, this
patch instead makes them accept a pointer to netlink_ctx as first
parameter to gather both the old (nf_sock, seqnum) and the new values
(debug_mask, octx) from.

Since after the above change struct mnl_ctx was not really used anymore,
so the remaining places were adjusted as well to allow for removing the
struct altogether.

Note that cache routines needed special treatment: Although parameters
of cache_update() make it a candidate for the same change, it can't be
converted since it is called in evaluation phase sometimes in which
there is no netlink context available (but just eval context instead).
Since netlink_genid_get() needs a netlink context though, the ad-hoc
netlink_ctx definition from cache_init() is moved into cache_update() to
have it available there already.

Signed-off-by: Phil Sutter <phil@nwl.cc>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/include/netlink.h b/include/netlink.h
index b30c05f8..51cd5c9d 100644
--- a/include/netlink.h
+++ b/include/netlink.h
@@ -191,7 +191,7 @@ extern void netlink_dump_obj(struct nftnl_obj *nlo, struct netlink_ctx *ctx);
 
 extern int netlink_batch_send(struct netlink_ctx *ctx, struct list_head *err_list);
 
-extern uint16_t netlink_genid_get(struct mnl_socket *nf_sock, uint32_t seqnum);
+extern uint16_t netlink_genid_get(struct netlink_ctx *ctx);
 extern void netlink_restart(struct mnl_socket *nf_sock);
 #define netlink_abi_error()	\
 	__netlink_abi_error(__FILE__, __LINE__, strerror(errno));