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net/sched: introduce ACT_P_BOUND return code

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Bound actions always return '0' and as of today we rely on '0'
being returned in order to properly skip bound actions in
tcf_idr_insert_many. In order to further improve maintainability,
introduce the ACT_P_BOUND return code.

Actions are updated to return 'ACT_P_BOUND' instead of plain '0'.
tcf_idr_insert_many is then updated to check for 'ACT_P_BOUND'.

Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Acked-by: Jamal Hadi Salim <jhs@mojatatu.com>
Link: https://lore.kernel.org/r/20231229132642.1489088-1-pctammela@mojatatu.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Pedro Tammela 2023-12-29 10:26:41 -03:00 committed by Jakub Kicinski
parent d3d344a1ca
commit c2a67de9bb
21 changed files with 22 additions and 21 deletions
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1
include/net/act_api.h
View file

@ -137,6 +137,7 @@ struct tc_action_ops {
#ifdef CONFIG_NET_CLS_ACT
#define ACT_P_BOUND 0
#define ACT_P_CREATED 1
#define ACT_P_DELETED 1

2
net/sched/act_api.c
View file

@ -1313,7 +1313,7 @@ void tcf_idr_insert_many(struct tc_action *actions[], int init_res[])
tcf_act_for_each_action(i, a, actions) {
struct tcf_idrinfo *idrinfo;
if (init_res[i] == 0) /* Bound */
if (init_res[i] == ACT_P_BOUND)
continue;
idrinfo = a->idrinfo;

2
net/sched/act_bpf.c
View file

@ -318,7 +318,7 @@ static int tcf_bpf_init(struct net *net, struct nlattr *nla,
} else if (ret > 0) {
/* Don't override defaults. */
if (bind)
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*act, bind);

2
net/sched/act_connmark.c
View file

@ -146,7 +146,7 @@ static int tcf_connmark_init(struct net *net, struct nlattr *nla,
} else if (ret > 0) {
ci = to_connmark(*a);
if (bind) {
err = 0;
err = ACT_P_BOUND;
goto out_free;
}
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {

4
net/sched/act_csum.c
View file

@ -77,8 +77,8 @@ static int tcf_csum_init(struct net *net, struct nlattr *nla,
}
ret = ACT_P_CREATED;
} else if (err > 0) {
if (bind)/* dont override defaults */
return 0;
if (bind) /* dont override defaults */
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*a, bind);
return -EEXIST;

2
net/sched/act_ct.c
View file

@ -1349,7 +1349,7 @@ static int tcf_ct_init(struct net *net, struct nlattr *nla,
res = ACT_P_CREATED;
} else {
if (bind)
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*a, bind);

2
net/sched/act_ctinfo.c
View file

@ -221,7 +221,7 @@ static int tcf_ctinfo_init(struct net *net, struct nlattr *nla,
ret = ACT_P_CREATED;
} else if (err > 0) {
if (bind) /* don't override defaults */
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*a, bind);
return -EEXIST;

2
net/sched/act_gact.c
View file

@ -108,7 +108,7 @@ static int tcf_gact_init(struct net *net, struct nlattr *nla,
ret = ACT_P_CREATED;
} else if (err > 0) {
if (bind)/* dont override defaults */
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*a, bind);
return -EEXIST;

2
net/sched/act_gate.c
View file

@ -356,7 +356,7 @@ static int tcf_gate_init(struct net *net, struct nlattr *nla,
return err;
if (err && bind)
return 0;
return ACT_P_BOUND;
if (!err) {
ret = tcf_idr_create_from_flags(tn, index, est, a,

2
net/sched/act_ife.c
View file

@ -548,7 +548,7 @@ static int tcf_ife_init(struct net *net, struct nlattr *nla,
exists = err;
if (exists && bind) {
kfree(p);
return 0;
return ACT_P_BOUND;
}
if (!exists) {

2
net/sched/act_mirred.c
View file

@ -135,7 +135,7 @@ static int tcf_mirred_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (tb[TCA_MIRRED_BLOCKID] && parm->ifindex) {
NL_SET_ERR_MSG_MOD(extack,

2
net/sched/act_mpls.c
View file

@ -195,7 +195,7 @@ static int tcf_mpls_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (!exists) {
ret = tcf_idr_create(tn, index, est, a, &act_mpls_ops, bind,

2
net/sched/act_nat.c
View file

@ -69,7 +69,7 @@ static int tcf_nat_init(struct net *net, struct nlattr *nla, struct nlattr *est,
ret = ACT_P_CREATED;
} else if (err > 0) {
if (bind)
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
tcf_idr_release(*a, bind);
return -EEXIST;

2
net/sched/act_pedit.c
View file

@ -202,7 +202,7 @@ static int tcf_pedit_init(struct net *net, struct nlattr *nla,
ret = ACT_P_CREATED;
} else if (err > 0) {
if (bind)
return 0;
return ACT_P_BOUND;
if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
ret = -EEXIST;
goto out_release;

2
net/sched/act_police.c
View file

@ -77,7 +77,7 @@ static int tcf_police_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (!exists) {
ret = tcf_idr_create(tn, index, NULL, a,

2
net/sched/act_sample.c
View file

@ -66,7 +66,7 @@ static int tcf_sample_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (!exists) {
ret = tcf_idr_create(tn, index, est, a,

2
net/sched/act_simple.c
View file

@ -118,7 +118,7 @@ static int tcf_simp_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (tb[TCA_DEF_DATA] == NULL) {
if (exists)

2
net/sched/act_skbedit.c
View file

@ -209,7 +209,7 @@ static int tcf_skbedit_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (!flags) {
if (exists)

2
net/sched/act_skbmod.c
View file

@ -157,7 +157,7 @@ static int tcf_skbmod_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
if (!lflags) {
if (exists)

2
net/sched/act_tunnel_key.c
View file

@ -401,7 +401,7 @@ static int tunnel_key_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
switch (parm->t_action) {
case TCA_TUNNEL_KEY_ACT_RELEASE:

2
net/sched/act_vlan.c
View file

@ -151,7 +151,7 @@ static int tcf_vlan_init(struct net *net, struct nlattr *nla,
return err;
exists = err;
if (exists && bind)
return 0;
return ACT_P_BOUND;
switch (parm->v_action) {
case TCA_VLAN_ACT_POP: