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authorPedro Tammela <pctammela@mojatatu.com>2023-02-24 12:00:57 -0300
committerDavid S. Miller <davem@davemloft.net>2023-02-26 18:27:45 +0000
commite88d78a773cb5242e933930c8855bf4b2e8c2397 (patch)
tree95dfc8958a87b518a5fd3305bb453abe2a73a996 /net
parente9e42292ea76a8358b0c02ffd530d78e133a1b73 (diff)
net/sched: act_mpls: fix action bind logic
The TC architecture allows filters and actions to be created independently. In filters the user can reference action objects using: tc action add action mpls ... index 1 tc filter add ... action mpls index 1 In the current code for act_mpls this is broken as it checks netlink attributes for create/update before actually checking if we are binding to an existing action. tdc results: 1..53 ok 1 a933 - Add MPLS dec_ttl action with pipe opcode ok 2 08d1 - Add mpls dec_ttl action with pass opcode ok 3 d786 - Add mpls dec_ttl action with drop opcode ok 4 f334 - Add mpls dec_ttl action with reclassify opcode ok 5 29bd - Add mpls dec_ttl action with continue opcode ok 6 48df - Add mpls dec_ttl action with jump opcode ok 7 62eb - Add mpls dec_ttl action with trap opcode ok 8 09d2 - Add mpls dec_ttl action with opcode and cookie ok 9 c170 - Add mpls dec_ttl action with opcode and cookie of max length ok 10 9118 - Add mpls dec_ttl action with invalid opcode ok 11 6ce1 - Add mpls dec_ttl action with label (invalid) ok 12 352f - Add mpls dec_ttl action with tc (invalid) ok 13 fa1c - Add mpls dec_ttl action with ttl (invalid) ok 14 6b79 - Add mpls dec_ttl action with bos (invalid) ok 15 d4c4 - Add mpls pop action with ip proto ok 16 91fb - Add mpls pop action with ip proto and cookie ok 17 92fe - Add mpls pop action with mpls proto ok 18 7e23 - Add mpls pop action with no protocol (invalid) ok 19 6182 - Add mpls pop action with label (invalid) ok 20 6475 - Add mpls pop action with tc (invalid) ok 21 067b - Add mpls pop action with ttl (invalid) ok 22 7316 - Add mpls pop action with bos (invalid) ok 23 38cc - Add mpls push action with label ok 24 c281 - Add mpls push action with mpls_mc protocol ok 25 5db4 - Add mpls push action with label, tc and ttl ok 26 7c34 - Add mpls push action with label, tc ttl and cookie of max length ok 27 16eb - Add mpls push action with label and bos ok 28 d69d - Add mpls push action with no label (invalid) ok 29 e8e4 - Add mpls push action with ipv4 protocol (invalid) ok 30 ecd0 - Add mpls push action with out of range label (invalid) ok 31 d303 - Add mpls push action with out of range tc (invalid) ok 32 fd6e - Add mpls push action with ttl of 0 (invalid) ok 33 19e9 - Add mpls mod action with mpls label ok 34 1fde - Add mpls mod action with max mpls label ok 35 0c50 - Add mpls mod action with mpls label exceeding max (invalid) ok 36 10b6 - Add mpls mod action with mpls label of MPLS_LABEL_IMPLNULL (invalid) ok 37 57c9 - Add mpls mod action with mpls min tc ok 38 6872 - Add mpls mod action with mpls max tc ok 39 a70a - Add mpls mod action with mpls tc exceeding max (invalid) ok 40 6ed5 - Add mpls mod action with mpls ttl ok 41 77c1 - Add mpls mod action with mpls ttl and cookie ok 42 b80f - Add mpls mod action with mpls max ttl ok 43 8864 - Add mpls mod action with mpls min ttl ok 44 6c06 - Add mpls mod action with mpls ttl of 0 (invalid) ok 45 b5d8 - Add mpls mod action with mpls ttl exceeding max (invalid) ok 46 451f - Add mpls mod action with mpls max bos ok 47 a1ed - Add mpls mod action with mpls min bos ok 48 3dcf - Add mpls mod action with mpls bos exceeding max (invalid) ok 49 db7c - Add mpls mod action with protocol (invalid) ok 50 b070 - Replace existing mpls push action with new ID ok 51 95a9 - Replace existing mpls push action with new label, tc, ttl and cookie ok 52 6cce - Delete mpls pop action ok 53 d138 - Flush mpls actions Fixes: 2a2ea50870ba ("net: sched: add mpls manipulation actions to TC") Reviewed-by: Jamal Hadi Salim <jhs@mojatatu.com> Signed-off-by: Pedro Tammela <pctammela@mojatatu.com> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net')
-rw-r--r--net/sched/act_mpls.c66
1 files changed, 37 insertions, 29 deletions
diff --git a/net/sched/act_mpls.c b/net/sched/act_mpls.c
index 6b26bdb999d7..809f7928a1be 100644
--- a/net/sched/act_mpls.c
+++ b/net/sched/act_mpls.c
@@ -190,40 +190,67 @@ static int tcf_mpls_init(struct net *net, struct nlattr *nla,
parm = nla_data(tb[TCA_MPLS_PARMS]);
index = parm->index;
+ err = tcf_idr_check_alloc(tn, &index, a, bind);
+ if (err < 0)
+ return err;
+ exists = err;
+ if (exists && bind)
+ return 0;
+
+ if (!exists) {
+ ret = tcf_idr_create(tn, index, est, a, &act_mpls_ops, bind,
+ true, flags);
+ if (ret) {
+ tcf_idr_cleanup(tn, index);
+ return ret;
+ }
+
+ ret = ACT_P_CREATED;
+ } else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
+ tcf_idr_release(*a, bind);
+ return -EEXIST;
+ }
+
/* Verify parameters against action type. */
switch (parm->m_action) {
case TCA_MPLS_ACT_POP:
if (!tb[TCA_MPLS_PROTO]) {
NL_SET_ERR_MSG_MOD(extack, "Protocol must be set for MPLS pop");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
if (!eth_proto_is_802_3(nla_get_be16(tb[TCA_MPLS_PROTO]))) {
NL_SET_ERR_MSG_MOD(extack, "Invalid protocol type for MPLS pop");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
if (tb[TCA_MPLS_LABEL] || tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC] ||
tb[TCA_MPLS_BOS]) {
NL_SET_ERR_MSG_MOD(extack, "Label, TTL, TC or BOS cannot be used with MPLS pop");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
break;
case TCA_MPLS_ACT_DEC_TTL:
if (tb[TCA_MPLS_PROTO] || tb[TCA_MPLS_LABEL] ||
tb[TCA_MPLS_TTL] || tb[TCA_MPLS_TC] || tb[TCA_MPLS_BOS]) {
NL_SET_ERR_MSG_MOD(extack, "Label, TTL, TC, BOS or protocol cannot be used with MPLS dec_ttl");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
break;
case TCA_MPLS_ACT_PUSH:
case TCA_MPLS_ACT_MAC_PUSH:
if (!tb[TCA_MPLS_LABEL]) {
NL_SET_ERR_MSG_MOD(extack, "Label is required for MPLS push");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
if (tb[TCA_MPLS_PROTO] &&
!eth_p_mpls(nla_get_be16(tb[TCA_MPLS_PROTO]))) {
NL_SET_ERR_MSG_MOD(extack, "Protocol must be an MPLS type for MPLS push");
- return -EPROTONOSUPPORT;
+ err = -EPROTONOSUPPORT;
+ goto release_idr;
}
/* Push needs a TTL - if not specified, set a default value. */
if (!tb[TCA_MPLS_TTL]) {
@@ -238,33 +265,14 @@ static int tcf_mpls_init(struct net *net, struct nlattr *nla,
case TCA_MPLS_ACT_MODIFY:
if (tb[TCA_MPLS_PROTO]) {
NL_SET_ERR_MSG_MOD(extack, "Protocol cannot be used with MPLS modify");
- return -EINVAL;
+ err = -EINVAL;
+ goto release_idr;
}
break;
default:
NL_SET_ERR_MSG_MOD(extack, "Unknown MPLS action");
- return -EINVAL;
- }
-
- err = tcf_idr_check_alloc(tn, &index, a, bind);
- if (err < 0)
- return err;
- exists = err;
- if (exists && bind)
- return 0;
-
- if (!exists) {
- ret = tcf_idr_create(tn, index, est, a,
- &act_mpls_ops, bind, true, flags);
- if (ret) {
- tcf_idr_cleanup(tn, index);
- return ret;
- }
-
- ret = ACT_P_CREATED;
- } else if (!(flags & TCA_ACT_FLAGS_REPLACE)) {
- tcf_idr_release(*a, bind);
- return -EEXIST;
+ err = -EINVAL;
+ goto release_idr;
}
err = tcf_action_check_ctrlact(parm->action, tp, &goto_ch, extack);