[PATCH v2 08/18] gtp: consolidate pdp context destruction into helper

Remove duplicate code and use a rcu helper to free the structure to prepare for addition of PDP context members that need to be handled in the rcu callcack. Signed-off-by: Andreas Schultz &lt;aschultz(a)tpip.net&gt; --- drivers/net/gtp.c | 32 +++++++++++++++++++++----------- 1 file changed, 21 insertions(+), 11 deletions(-) diff --git a/drivers/net/gtp.c b/drivers/net/gtp.c index f434f84..c117f63 100644 --- a/drivers/net/gtp.c +++ b/drivers/net/gtp.c @@ -84,6 +84,8 @@ struct gtp_net { static u32 gtp_h_initval; +static void pdp_context_delete(struct pdp_ctx *pctx); + static inline u32 gtp0_hashfn(u64 tid) { u32 *tid32 = (u32 *) &tid; @@ -775,13 +777,10 @@ static void gtp_hashtable_free(struct gtp_dev *gtp) struct pdp_ctx *pctx; int i; - for (i = 0; i < gtp->hash_size; i++) { - hlist_for_each_entry_rcu(pctx, &gtp->tid_hash[i], hlist_tid) { - hlist_del_rcu(&pctx->hlist_tid); - hlist_del_rcu(&pctx->hlist_addr); - kfree_rcu(pctx, rcu_head); - } - } + for (i = 0; i < gtp->hash_size; i++) + hlist_for_each_entry_rcu(pctx, &gtp->tid_hash[i], hlist_tid) + pdp_context_delete(pctx); + synchronize_rcu(); kfree(gtp->addr_hash); kfree(gtp->tid_hash); @@ -984,6 +983,20 @@ static int ipv4_pdp_add(struct net_device *dev, struct genl_info *info) return 0; } +static void pdp_context_free(struct rcu_head *head) +{ + struct pdp_ctx *pctx = container_of(head, struct pdp_ctx, rcu_head); + + kfree(pctx); +} + +static void pdp_context_delete(struct pdp_ctx *pctx) +{ + hlist_del_rcu(&pctx->hlist_tid); + hlist_del_rcu(&pctx->hlist_addr); + call_rcu(&pctx->rcu_head, pdp_context_free); +} + static int gtp_genl_new_pdp(struct sk_buff *skb, struct genl_info *info) { struct net_device *dev; @@ -1082,10 +1095,7 @@ static int gtp_genl_del_pdp(struct sk_buff *skb, struct genl_info *info) pr_debug("GTPv1-U: deleting tunnel id = %x/%x (pdp %p)\n", pctx->u.v1.i_tei, pctx->u.v1.o_tei, pctx); - hlist_del_rcu(&pctx->hlist_tid); - hlist_del_rcu(&pctx->hlist_addr); - kfree_rcu(pctx, rcu_head); - + pdp_context_delete(pctx); return 0; } -- 2.10.2