From: Alexander Aring <aring@mojatatu.com>
Date: Wed, 20 Dec 2017 12:35:19 -0500
Subject: net: sch: api: add extack support in tcf_block_get
Patch-mainline: v4.16-rc1
Git-commit: 8d1a77f974ca61d39afa5bf0aeab210525d31475
References: bsc#1109837
This patch adds extack support for the function tcf_block_get 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 tcf_block_get failed.
Cc: David Ahern <dsahern@gmail.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: Alexander Aring <aring@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
include/net/pkt_cls.h | 6 ++++--
net/sched/cls_api.c | 13 +++++++++----
net/sched/sch_atm.c | 6 ++++--
net/sched/sch_cbq.c | 4 ++--
net/sched/sch_drr.c | 2 +-
net/sched/sch_dsmark.c | 2 +-
net/sched/sch_fq_codel.c | 2 +-
net/sched/sch_hfsc.c | 4 ++--
net/sched/sch_htb.c | 4 ++--
net/sched/sch_ingress.c | 7 ++++---
net/sched/sch_multiq.c | 2 +-
net/sched/sch_prio.c | 2 +-
net/sched/sch_qfq.c | 2 +-
net/sched/sch_sfb.c | 2 +-
net/sched/sch_sfq.c | 2 +-
15 files changed, 35 insertions(+), 25 deletions(-)
--- a/include/net/pkt_cls.h
+++ b/include/net/pkt_cls.h
@@ -39,9 +39,11 @@ struct tcf_chain *tcf_chain_get(struct t
bool create);
void tcf_chain_put(struct tcf_chain *chain);
int tcf_block_get(struct tcf_block **p_block,
- struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q);
+ struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+ struct netlink_ext_ack *extack);
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
- struct tcf_block_ext_info *ei);
+ struct tcf_block_ext_info *ei,
+ struct netlink_ext_ack *extack);
void tcf_block_put(struct tcf_block *block);
void tcf_block_put_ext(struct tcf_block *block, struct Qdisc *q,
struct tcf_block_ext_info *ei);
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -282,20 +282,24 @@ static void tcf_block_offload_unbind(str
}
int tcf_block_get_ext(struct tcf_block **p_block, struct Qdisc *q,
- struct tcf_block_ext_info *ei)
+ struct tcf_block_ext_info *ei,
+ struct netlink_ext_ack *extack)
{
struct tcf_block *block = kzalloc(sizeof(*block), GFP_KERNEL);
struct tcf_chain *chain;
int err;
- if (!block)
+ if (!block) {
+ NL_SET_ERR_MSG(extack, "Memory allocation for block failed");
return -ENOMEM;
+ }
INIT_LIST_HEAD(&block->chain_list);
INIT_LIST_HEAD(&block->cb_list);
/* Create chain 0 by default, it has to be always present. */
chain = tcf_chain_create(block, 0);
if (!chain) {
+ NL_SET_ERR_MSG(extack, "Failed to create new tcf chain");
err = -ENOMEM;
goto err_chain_create;
}
@@ -322,7 +326,8 @@ static void tcf_chain_head_change_dflt(s
}
int tcf_block_get(struct tcf_block **p_block,
- struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q)
+ struct tcf_proto __rcu **p_filter_chain, struct Qdisc *q,
+ struct netlink_ext_ack *extack)
{
struct tcf_block_ext_info ei = {
.chain_head_change = tcf_chain_head_change_dflt,
@@ -330,7 +335,7 @@ int tcf_block_get(struct tcf_block **p_b
};
WARN_ON(!p_filter_chain);
- return tcf_block_get_ext(p_block, q, &ei);
+ return tcf_block_get_ext(p_block, q, &ei, extack);
}
EXPORT_SYMBOL(tcf_block_get);
--- a/net/sched/sch_atm.c
+++ b/net/sched/sch_atm.c
@@ -283,7 +283,8 @@ static int atm_tc_change(struct Qdisc *s
goto err_out;
}
- error = tcf_block_get(&flow->block, &flow->filter_list, sch);
+ error = tcf_block_get(&flow->block, &flow->filter_list, sch,
+ extack);
if (error) {
kfree(flow);
goto err_out;
@@ -550,7 +551,8 @@ static int atm_tc_init(struct Qdisc *sch
p->link.q = &noop_qdisc;
pr_debug("atm_tc_init: link (%p) qdisc %p\n", &p->link, p->link.q);
- err = tcf_block_get(&p->link.block, &p->link.filter_list, sch);
+ err = tcf_block_get(&p->link.block, &p->link.filter_list, sch,
+ extack);
if (err)
return err;
--- a/net/sched/sch_cbq.c
+++ b/net/sched/sch_cbq.c
@@ -1160,7 +1160,7 @@ static int cbq_init(struct Qdisc *sch, s
if (!q->link.R_tab)
return -EINVAL;
- err = tcf_block_get(&q->link.block, &q->link.filter_list, sch);
+ err = tcf_block_get(&q->link.block, &q->link.filter_list, sch, extack);
if (err)
goto put_rtab;
@@ -1576,7 +1576,7 @@ cbq_change_class(struct Qdisc *sch, u32
if (cl == NULL)
goto failure;
- err = tcf_block_get(&cl->block, &cl->filter_list, sch);
+ err = tcf_block_get(&cl->block, &cl->filter_list, sch, extack);
if (err) {
kfree(cl);
return err;
--- a/net/sched/sch_drr.c
+++ b/net/sched/sch_drr.c
@@ -417,7 +417,7 @@ static int drr_init_qdisc(struct Qdisc *
struct drr_sched *q = qdisc_priv(sch);
int err;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
err = qdisc_class_hash_init(&q->clhash);
--- a/net/sched/sch_dsmark.c
+++ b/net/sched/sch_dsmark.c
@@ -348,7 +348,7 @@ static int dsmark_init(struct Qdisc *sch
if (!opt)
goto errout;
- err = tcf_block_get(&p->block, &p->filter_list, sch);
+ err = tcf_block_get(&p->block, &p->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_fq_codel.c
+++ b/net/sched/sch_fq_codel.c
@@ -484,7 +484,7 @@ static int fq_codel_init(struct Qdisc *s
return err;
}
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_hfsc.c
+++ b/net/sched/sch_hfsc.c
@@ -1034,7 +1034,7 @@ hfsc_change_class(struct Qdisc *sch, u32
if (cl == NULL)
return -ENOBUFS;
- err = tcf_block_get(&cl->block, &cl->filter_list, sch);
+ err = tcf_block_get(&cl->block, &cl->filter_list, sch, extack);
if (err) {
kfree(cl);
return err;
@@ -1409,7 +1409,7 @@ hfsc_init_qdisc(struct Qdisc *sch, struc
return err;
q->eligible = RB_ROOT;
- err = tcf_block_get(&q->root.block, &q->root.filter_list, sch);
+ err = tcf_block_get(&q->root.block, &q->root.filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_htb.c
+++ b/net/sched/sch_htb.c
@@ -1032,7 +1032,7 @@ static int htb_init(struct Qdisc *sch, s
if (!opt)
return -EINVAL;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
@@ -1397,7 +1397,7 @@ static int htb_change_class(struct Qdisc
if (!cl)
goto failure;
- err = tcf_block_get(&cl->block, &cl->filter_list, sch);
+ err = tcf_block_get(&cl->block, &cl->filter_list, sch, extack);
if (err) {
kfree(cl);
goto failure;
--- a/net/sched/sch_ingress.c
+++ b/net/sched/sch_ingress.c
@@ -77,7 +77,7 @@ static int ingress_init(struct Qdisc *sc
q->block_info.chain_head_change = clsact_chain_head_change;
q->block_info.chain_head_change_priv = &q->miniqp;
- return tcf_block_get_ext(&q->block, sch, &q->block_info);
+ return tcf_block_get_ext(&q->block, sch, &q->block_info, extack);
}
static void ingress_destroy(struct Qdisc *sch)
@@ -180,7 +180,8 @@ static int clsact_init(struct Qdisc *sch
q->ingress_block_info.chain_head_change = clsact_chain_head_change;
q->ingress_block_info.chain_head_change_priv = &q->miniqp_ingress;
- err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info);
+ err = tcf_block_get_ext(&q->ingress_block, sch, &q->ingress_block_info,
+ extack);
if (err)
return err;
@@ -190,7 +191,7 @@ static int clsact_init(struct Qdisc *sch
q->egress_block_info.chain_head_change = clsact_chain_head_change;
q->egress_block_info.chain_head_change_priv = &q->miniqp_egress;
- return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info);
+ return tcf_block_get_ext(&q->egress_block, sch, &q->egress_block_info, extack);
}
static void clsact_destroy(struct Qdisc *sch)
--- a/net/sched/sch_multiq.c
+++ b/net/sched/sch_multiq.c
@@ -248,7 +248,7 @@ static int multiq_init(struct Qdisc *sch
if (!opt)
return -EINVAL;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_prio.c
+++ b/net/sched/sch_prio.c
@@ -215,7 +215,7 @@ static int prio_init(struct Qdisc *sch,
if (!opt)
return -EINVAL;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_qfq.c
+++ b/net/sched/sch_qfq.c
@@ -1424,7 +1424,7 @@ static int qfq_init_qdisc(struct Qdisc *
int i, j, err;
u32 max_cl_shift, maxbudg_shift, max_classes;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_sfb.c
+++ b/net/sched/sch_sfb.c
@@ -556,7 +556,7 @@ static int sfb_init(struct Qdisc *sch, s
struct sfb_sched_data *q = qdisc_priv(sch);
int err;
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;
--- a/net/sched/sch_sfq.c
+++ b/net/sched/sch_sfq.c
@@ -730,7 +730,7 @@ static int sfq_init(struct Qdisc *sch, s
setup_deferrable_timer(&q->perturb_timer, sfq_perturbation,
(unsigned long)sch);
- err = tcf_block_get(&q->block, &q->filter_list, sch);
+ err = tcf_block_get(&q->block, &q->filter_list, sch, extack);
if (err)
return err;