@@ -429,6 +429,8 @@ struct devlink_region *devlink_region_create(struct devlink *devlink,
u64 region_size);
void devlink_region_destroy(struct devlink_region *region);
u32 devlink_region_shapshot_id_get(struct devlink *devlink);
+int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
+ u8 *data, u32 snapshot_id);
#else
@@ -619,6 +621,13 @@ static inline bool devlink_dpipe_table_counter_enabled(struct devlink *devlink,
return 0;
}
+static inline int
+devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
+ u8 *data, u32 snapshot_id)
+{
+ return 0;
+}
+
#endif
#endif /* _NET_DEVLINK_H_ */
@@ -336,6 +336,14 @@ struct devlink_region {
u64 size;
};
+struct devlink_snapshot {
+ struct list_head list;
+ struct devlink_region *region;
+ u64 data_len;
+ u8 *data;
+ u32 id;
+};
+
static struct devlink_region *
devlink_region_get_by_name(struct devlink *devlink, const char *region_name)
{
@@ -348,6 +356,26 @@ struct devlink_region {
return NULL;
}
+static struct devlink_snapshot *
+devlink_region_snapshot_get_by_id(struct devlink_region *region, u32 id)
+{
+ struct devlink_snapshot *snapshot;
+
+ list_for_each_entry(snapshot, ®ion->snapshot_list, list)
+ if (snapshot->id == id)
+ return snapshot;
+
+ return NULL;
+}
+
+static void devlink_region_snapshot_del(struct devlink_snapshot *snapshot)
+{
+ snapshot->region->cur_snapshots--;
+ list_del(&snapshot->list);
+ kfree(snapshot->data);
+ kfree(snapshot);
+}
+
#define DEVLINK_NL_FLAG_NEED_DEVLINK BIT(0)
#define DEVLINK_NL_FLAG_NEED_PORT BIT(1)
#define DEVLINK_NL_FLAG_NEED_SB BIT(2)
@@ -3391,8 +3419,14 @@ struct devlink_region *devlink_region_create(struct devlink *devlink,
void devlink_region_destroy(struct devlink_region *region)
{
struct devlink *devlink = region->devlink;
+ struct devlink_snapshot *snapshot, *ts;
mutex_lock(&devlink->lock);
+
+ /* Free all snapshots of region */
+ list_for_each_entry_safe(snapshot, ts, ®ion->snapshot_list, list)
+ devlink_region_snapshot_del(snapshot);
+
list_del(®ion->list);
mutex_unlock(&devlink->lock);
kfree(region);
@@ -3420,6 +3454,71 @@ u32 devlink_region_shapshot_id_get(struct devlink *devlink)
}
EXPORT_SYMBOL_GPL(devlink_region_shapshot_id_get);
+/**
+ * devlink_region_snapshot_create - create a new snapshot
+ * This will add a new snapshot of a region. The snapshot
+ * will be stored on the region struct and can be accessed
+ * from devlink. This is useful for future analyses of snapshots.
+ * Multiple snapshots can be created on a region.
+ * The @snapshot_id should be obtained using the getter function.
+ *
+ * @devlink_region: devlink region of the snapshot
+ * @data_len: size of snapshot data
+ * @data: snapshot data
+ * @snapshot_id: snapshot id to be created
+ */
+int devlink_region_snapshot_create(struct devlink_region *region, u64 data_len,
+ u8 *data, u32 snapshot_id)
+{
+ struct devlink *devlink = region->devlink;
+ struct devlink_snapshot *snapshot;
+ int err;
+
+ mutex_lock(&devlink->lock);
+
+ /* check if region can hold one more snapshot */
+ if (region->cur_snapshots == region->max_snapshots) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ if (devlink_region_snapshot_get_by_id(region, snapshot_id)) {
+ err = -EEXIST;
+ goto unlock;
+ }
+
+ snapshot = kzalloc(sizeof(*snapshot), GFP_KERNEL);
+ if (!snapshot) {
+ err = -ENOMEM;
+ goto unlock;
+ }
+
+ snapshot->data = kzalloc(data_len, GFP_KERNEL);
+ if (!snapshot->data) {
+ err = -ENOMEM;
+ goto free_snapshot;
+ }
+
+ snapshot->id = snapshot_id;
+ snapshot->region = region;
+ snapshot->data_len = data_len;
+ memcpy(snapshot->data, data, data_len);
+
+ list_add_tail(&snapshot->list, ®ion->snapshot_list);
+
+ region->cur_snapshots++;
+
+ mutex_unlock(&devlink->lock);
+ return 0;
+
+free_snapshot:
+ kfree(snapshot);
+unlock:
+ mutex_unlock(&devlink->lock);
+ return err;
+}
+EXPORT_SYMBOL_GPL(devlink_region_snapshot_create);
+
static int __init devlink_module_init(void)
{
return genl_register_family(&devlink_nl_family);