Adds a function page_pool_get_stats which can be used by drivers to obtain
stats for a specified page_pool.
Signed-off-by: Joe Damato <jdamato@xxxxxxxxxx>
Acked-by: Jesper Dangaard Brouer <brouer@xxxxxxxxxx>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@xxxxxxxxxx>
---
include/net/page_pool.h | 17 +++++++++++++++++
net/core/page_pool.c | 25 +++++++++++++++++++++++++
2 files changed, 42 insertions(+)
diff --git a/include/net/page_pool.h b/include/net/page_pool.h
index 298af95..ea5fb70 100644
--- a/include/net/page_pool.h
+++ b/include/net/page_pool.h
@@ -107,6 +107,23 @@ struct page_pool_recycle_stats {
* refcnt
*/
};
+
+/* This struct wraps the above stats structs so users of the
+ * page_pool_get_stats API can pass a single argument when requesting the
+ * stats for the page pool.
+ */
+struct page_pool_stats {
+ struct page_pool_alloc_stats alloc_stats;
+ struct page_pool_recycle_stats recycle_stats;
+};
+
+/*
+ * Drivers that wish to harvest page pool stats and report them to users
+ * (perhaps via ethtool, debugfs, or another mechanism) can allocate a
+ * struct page_pool_stats call page_pool_get_stats to get stats for the specified pool.
+ */
+bool page_pool_get_stats(struct page_pool *pool,
+ struct page_pool_stats *stats);
#endif
struct page_pool {
diff --git a/net/core/page_pool.c b/net/core/page_pool.c
index 27233bf..f4f8f5f 100644
--- a/net/core/page_pool.c
+++ b/net/core/page_pool.c
@@ -35,6 +35,31 @@
struct page_pool_recycle_stats __percpu *s = pool->recycle_stats; \
this_cpu_inc(s->__stat); \
} while (0)
+
+bool page_pool_get_stats(struct page_pool *pool,
+ struct page_pool_stats *stats)
+{
+ int cpu = 0;
+
+ if (!stats)
+ return false;
+
+ memcpy(&stats->alloc_stats, &pool->alloc_stats, sizeof(pool->alloc_stats));
+
+ for_each_possible_cpu(cpu) {
+ const struct page_pool_recycle_stats *pcpu =
+ per_cpu_ptr(pool->recycle_stats, cpu);
+
+ stats->recycle_stats.cached += pcpu->cached;
+ stats->recycle_stats.cache_full += pcpu->cache_full;
+ stats->recycle_stats.ring += pcpu->ring;
+ stats->recycle_stats.ring_full += pcpu->ring_full;
+ stats->recycle_stats.released_refcnt += pcpu->released_refcnt;
+ }
+
+ return true;
+}
+EXPORT_SYMBOL(page_pool_get_stats);
#else
#define alloc_stat_inc(pool, __stat)
#define recycle_stat_inc(pool, __stat)
--
2.7.4
