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Diffstat (limited to 'net/sched/sch_taprio.c')
-rw-r--r--net/sched/sch_taprio.c102
1 files changed, 41 insertions, 61 deletions
diff --git a/net/sched/sch_taprio.c b/net/sched/sch_taprio.c
index ad99409c63..0b150b13be 100644
--- a/net/sched/sch_taprio.c
+++ b/net/sched/sch_taprio.c
@@ -40,6 +40,8 @@ static struct static_key_false taprio_have_working_mqprio;
#define TXTIME_ASSIST_IS_ENABLED(flags) ((flags) & TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST)
#define FULL_OFFLOAD_IS_ENABLED(flags) ((flags) & TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD)
+#define TAPRIO_SUPPORTED_FLAGS \
+ (TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST | TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD)
#define TAPRIO_FLAGS_INVALID U32_MAX
struct sched_entry {
@@ -408,19 +410,6 @@ static bool is_valid_interval(struct sk_buff *skb, struct Qdisc *sch)
return entry;
}
-static bool taprio_flags_valid(u32 flags)
-{
- /* Make sure no other flag bits are set. */
- if (flags & ~(TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST |
- TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD))
- return false;
- /* txtime-assist and full offload are mutually exclusive */
- if ((flags & TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST) &&
- (flags & TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD))
- return false;
- return true;
-}
-
/* This returns the tstamp value set by TCP in terms of the set clock. */
static ktime_t get_tcp_tstamp(struct taprio_sched *q, struct sk_buff *skb)
{
@@ -1032,7 +1021,8 @@ static const struct nla_policy taprio_policy[TCA_TAPRIO_ATTR_MAX + 1] = {
[TCA_TAPRIO_ATTR_SCHED_CYCLE_TIME] =
NLA_POLICY_FULL_RANGE_SIGNED(NLA_S64, &taprio_cycle_time_range),
[TCA_TAPRIO_ATTR_SCHED_CYCLE_TIME_EXTENSION] = { .type = NLA_S64 },
- [TCA_TAPRIO_ATTR_FLAGS] = { .type = NLA_U32 },
+ [TCA_TAPRIO_ATTR_FLAGS] =
+ NLA_POLICY_MASK(NLA_U32, TAPRIO_SUPPORTED_FLAGS),
[TCA_TAPRIO_ATTR_TXTIME_DELAY] = { .type = NLA_U32 },
[TCA_TAPRIO_ATTR_TC_ENTRY] = { .type = NLA_NESTED },
};
@@ -1161,11 +1151,6 @@ static int parse_taprio_schedule(struct taprio_sched *q, struct nlattr **tb,
list_for_each_entry(entry, &new->entries, list)
cycle = ktime_add_ns(cycle, entry->interval);
- if (!cycle) {
- NL_SET_ERR_MSG(extack, "'cycle_time' can never be 0");
- return -EINVAL;
- }
-
if (cycle < 0 || cycle > INT_MAX) {
NL_SET_ERR_MSG(extack, "'cycle_time' is too big");
return -EINVAL;
@@ -1174,6 +1159,11 @@ static int parse_taprio_schedule(struct taprio_sched *q, struct nlattr **tb,
new->cycle_time = cycle;
}
+ if (new->cycle_time < new->num_entries * length_to_duration(q, ETH_ZLEN)) {
+ NL_SET_ERR_MSG(extack, "'cycle_time' is too small");
+ return -EINVAL;
+ }
+
taprio_calculate_gate_durations(q, new);
return 0;
@@ -1186,16 +1176,13 @@ static int taprio_parse_mqprio_opt(struct net_device *dev,
{
bool allow_overlapping_txqs = TXTIME_ASSIST_IS_ENABLED(taprio_flags);
- if (!qopt && !dev->num_tc) {
- NL_SET_ERR_MSG(extack, "'mqprio' configuration is necessary");
- return -EINVAL;
- }
-
- /* If num_tc is already set, it means that the user already
- * configured the mqprio part
- */
- if (dev->num_tc)
+ if (!qopt) {
+ if (!dev->num_tc) {
+ NL_SET_ERR_MSG(extack, "'mqprio' configuration is necessary");
+ return -EINVAL;
+ }
return 0;
+ }
/* taprio imposes that traffic classes map 1:n to tx queues */
if (qopt->num_tc > dev->num_tx_queues) {
@@ -1816,33 +1803,6 @@ static int taprio_mqprio_cmp(const struct net_device *dev,
return 0;
}
-/* The semantics of the 'flags' argument in relation to 'change()'
- * requests, are interpreted following two rules (which are applied in
- * this order): (1) an omitted 'flags' argument is interpreted as
- * zero; (2) the 'flags' of a "running" taprio instance cannot be
- * changed.
- */
-static int taprio_new_flags(const struct nlattr *attr, u32 old,
- struct netlink_ext_ack *extack)
-{
- u32 new = 0;
-
- if (attr)
- new = nla_get_u32(attr);
-
- if (old != TAPRIO_FLAGS_INVALID && old != new) {
- NL_SET_ERR_MSG_MOD(extack, "Changing 'flags' of a running schedule is not supported");
- return -EOPNOTSUPP;
- }
-
- if (!taprio_flags_valid(new)) {
- NL_SET_ERR_MSG_MOD(extack, "Specified 'flags' are not valid");
- return -EINVAL;
- }
-
- return new;
-}
-
static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
struct netlink_ext_ack *extack)
{
@@ -1853,6 +1813,7 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
struct net_device *dev = qdisc_dev(sch);
struct tc_mqprio_qopt *mqprio = NULL;
unsigned long flags;
+ u32 taprio_flags;
ktime_t start;
int i, err;
@@ -1864,12 +1825,31 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
if (tb[TCA_TAPRIO_ATTR_PRIOMAP])
mqprio = nla_data(tb[TCA_TAPRIO_ATTR_PRIOMAP]);
- err = taprio_new_flags(tb[TCA_TAPRIO_ATTR_FLAGS],
- q->flags, extack);
- if (err < 0)
- return err;
+ /* The semantics of the 'flags' argument in relation to 'change()'
+ * requests, are interpreted following two rules (which are applied in
+ * this order): (1) an omitted 'flags' argument is interpreted as
+ * zero; (2) the 'flags' of a "running" taprio instance cannot be
+ * changed.
+ */
+ taprio_flags = tb[TCA_TAPRIO_ATTR_FLAGS] ? nla_get_u32(tb[TCA_TAPRIO_ATTR_FLAGS]) : 0;
- q->flags = err;
+ /* txtime-assist and full offload are mutually exclusive */
+ if ((taprio_flags & TCA_TAPRIO_ATTR_FLAG_TXTIME_ASSIST) &&
+ (taprio_flags & TCA_TAPRIO_ATTR_FLAG_FULL_OFFLOAD)) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[TCA_TAPRIO_ATTR_FLAGS],
+ "TXTIME_ASSIST and FULL_OFFLOAD are mutually exclusive");
+ return -EINVAL;
+ }
+
+ if (q->flags != TAPRIO_FLAGS_INVALID && q->flags != taprio_flags) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Changing 'flags' of a running schedule is not supported");
+ return -EOPNOTSUPP;
+ }
+ q->flags = taprio_flags;
+
+ /* Needed for length_to_duration() during netlink attribute parsing */
+ taprio_set_picos_per_byte(dev, q);
err = taprio_parse_mqprio_opt(dev, mqprio, extack, q->flags);
if (err < 0)
@@ -1930,7 +1910,6 @@ static int taprio_change(struct Qdisc *sch, struct nlattr *opt,
if (err < 0)
goto free_sched;
- taprio_set_picos_per_byte(dev, q);
taprio_update_queue_max_sdu(q, new_admin, stab);
if (FULL_OFFLOAD_IS_ENABLED(q->flags))
@@ -2549,6 +2528,7 @@ static struct Qdisc_ops taprio_qdisc_ops __read_mostly = {
.dump_stats = taprio_dump_stats,
.owner = THIS_MODULE,
};
+MODULE_ALIAS_NET_SCH("taprio");
static struct notifier_block taprio_device_notifier = {
.notifier_call = taprio_dev_notifier,
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 09:43:05 +0000