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Diffstat (limited to 'include/net/gen_stats.h')
-rw-r--r--include/net/gen_stats.h44
1 files changed, 23 insertions, 21 deletions
diff --git a/include/net/gen_stats.h b/include/net/gen_stats.h
index 304d792f7977..52b87588f467 100644
--- a/include/net/gen_stats.h
+++ b/include/net/gen_stats.h
@@ -7,15 +7,17 @@
#include <linux/rtnetlink.h>
#include <linux/pkt_sched.h>
-/* Note: this used to be in include/uapi/linux/gen_stats.h */
-struct gnet_stats_basic_packed {
- __u64 bytes;
- __u64 packets;
- struct u64_stats_sync syncp;
-};
-
-struct gnet_stats_basic_cpu {
- struct gnet_stats_basic_packed bstats;
+/* Throughput stats.
+ * Must be initialized beforehand with gnet_stats_basic_sync_init().
+ *
+ * If no reads can ever occur parallel to writes (e.g. stack-allocated
+ * bstats), then the internal stat values can be written to and read
+ * from directly. Otherwise, use _bstats_set/update() for writes and
+ * gnet_stats_add_basic() for reads.
+ */
+struct gnet_stats_basic_sync {
+ u64_stats_t bytes;
+ u64_stats_t packets;
struct u64_stats_sync syncp;
} __aligned(2 * sizeof(u64));
@@ -35,7 +37,7 @@ struct gnet_dump {
struct tc_stats tc_stats;
};
-void gnet_stats_basic_packed_init(struct gnet_stats_basic_packed *b);
+void gnet_stats_basic_sync_init(struct gnet_stats_basic_sync *b);
int gnet_stats_start_copy(struct sk_buff *skb, int type, spinlock_t *lock,
struct gnet_dump *d, int padattr);
@@ -46,16 +48,16 @@ int gnet_stats_start_copy_compat(struct sk_buff *skb, int type,
int gnet_stats_copy_basic(const seqcount_t *running,
struct gnet_dump *d,
- struct gnet_stats_basic_cpu __percpu *cpu,
- struct gnet_stats_basic_packed *b);
+ struct gnet_stats_basic_sync __percpu *cpu,
+ struct gnet_stats_basic_sync *b);
void gnet_stats_add_basic(const seqcount_t *running,
- struct gnet_stats_basic_packed *bstats,
- struct gnet_stats_basic_cpu __percpu *cpu,
- struct gnet_stats_basic_packed *b);
+ struct gnet_stats_basic_sync *bstats,
+ struct gnet_stats_basic_sync __percpu *cpu,
+ struct gnet_stats_basic_sync *b);
int gnet_stats_copy_basic_hw(const seqcount_t *running,
struct gnet_dump *d,
- struct gnet_stats_basic_cpu __percpu *cpu,
- struct gnet_stats_basic_packed *b);
+ struct gnet_stats_basic_sync __percpu *cpu,
+ struct gnet_stats_basic_sync *b);
int gnet_stats_copy_rate_est(struct gnet_dump *d,
struct net_rate_estimator __rcu **ptr);
int gnet_stats_copy_queue(struct gnet_dump *d,
@@ -68,14 +70,14 @@ int gnet_stats_copy_app(struct gnet_dump *d, void *st, int len);
int gnet_stats_finish_copy(struct gnet_dump *d);
-int gen_new_estimator(struct gnet_stats_basic_packed *bstats,
- struct gnet_stats_basic_cpu __percpu *cpu_bstats,
+int gen_new_estimator(struct gnet_stats_basic_sync *bstats,
+ struct gnet_stats_basic_sync __percpu *cpu_bstats,
struct net_rate_estimator __rcu **rate_est,
spinlock_t *lock,
seqcount_t *running, struct nlattr *opt);
void gen_kill_estimator(struct net_rate_estimator __rcu **ptr);
-int gen_replace_estimator(struct gnet_stats_basic_packed *bstats,
- struct gnet_stats_basic_cpu __percpu *cpu_bstats,
+int gen_replace_estimator(struct gnet_stats_basic_sync *bstats,
+ struct gnet_stats_basic_sync __percpu *cpu_bstats,
struct net_rate_estimator __rcu **ptr,
spinlock_t *lock,
seqcount_t *running, struct nlattr *opt);