From e9bc3fa28bae7612f41e3538f241a2f87f629c94 Mon Sep 17 00:00:00 2001 From: Alexander Aring Date: Wed, 20 Dec 2017 12:35:18 -0500 Subject: net: sch: api: add extack support in qdisc_get_rtab This patch adds extack support for the function qdisc_get_rtab which is a common used function in the tc subsystem. Callers which are interested in the receiving error can assign extack to get a more detailed information why qdisc_get_rtab failed. Cc: David Ahern Acked-by: Jamal Hadi Salim Signed-off-by: Alexander Aring Signed-off-by: David S. Miller --- net/sched/sch_api.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) (limited to 'net/sched/sch_api.c') diff --git a/net/sched/sch_api.c b/net/sched/sch_api.c index 4b950d72d13b..79a9fdf9471d 100644 --- a/net/sched/sch_api.c +++ b/net/sched/sch_api.c @@ -393,13 +393,16 @@ static __u8 __detect_linklayer(struct tc_ratespec *r, __u32 *rtab) static struct qdisc_rate_table *qdisc_rtab_list; struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, - struct nlattr *tab) + struct nlattr *tab, + struct netlink_ext_ack *extack) { struct qdisc_rate_table *rtab; if (tab == NULL || r->rate == 0 || r->cell_log == 0 || - nla_len(tab) != TC_RTAB_SIZE) + nla_len(tab) != TC_RTAB_SIZE) { + NL_SET_ERR_MSG(extack, "Invalid rate table parameters for searching"); return NULL; + } for (rtab = qdisc_rtab_list; rtab; rtab = rtab->next) { if (!memcmp(&rtab->rate, r, sizeof(struct tc_ratespec)) && @@ -418,6 +421,8 @@ struct qdisc_rate_table *qdisc_get_rtab(struct tc_ratespec *r, r->linklayer = __detect_linklayer(r, rtab->data); rtab->next = qdisc_rtab_list; qdisc_rtab_list = rtab; + } else { + NL_SET_ERR_MSG(extack, "Failed to allocate new qdisc rate table"); } return rtab; } -- cgit v1.2.3