Add a packet sequence number

[lttng-modules.git] / lib / ringbuffer / ring_buffer_backend.c

diff --git a/lib/ringbuffer/ring_buffer_backend.c b/lib/ringbuffer/ring_buffer_backend.c
index 3cc22d77b2d9ad5c2ed428fed783b9055a5f97d3..5466325f10a3b95535cf6270128254d35d656074 100644 (file)
--- a/lib/ringbuffer/ring_buffer_backend.c
+++ b/lib/ringbuffer/ring_buffer_backend.c
@@ -125,6 +125,15 @@ int lib_ring_buffer_backend_allocate(const struct lib_ring_buffer_config *config
        else
                bufb->buf_rsb.id = subbuffer_id(config, 0, 1, 0);
 
+       /* Allocate subbuffer packet counter table */
+       bufb->buf_cnt = kzalloc_node(ALIGN(
+                               sizeof(struct lib_ring_buffer_backend_counts)
+                               * num_subbuf,
+                               1 << INTERNODE_CACHE_SHIFT),
+                       GFP_KERNEL, cpu_to_node(max(bufb->cpu, 0)));
+       if (unlikely(!bufb->buf_cnt))
+               goto free_wsb;
+
        /* Assign pages to page index */
        for (i = 0; i < num_subbuf_alloc; i++) {
                for (j = 0; j < num_pages_per_subbuf; j++) {
@@ -148,6 +157,8 @@ int lib_ring_buffer_backend_allocate(const struct lib_ring_buffer_config *config
        kfree(pages);
        return 0;
 
+free_wsb:
+       kfree(bufb->buf_wsb);
 free_array:
        for (i = 0; (i < num_subbuf_alloc && bufb->array[i]); i++)
                kfree(bufb->array[i]);
@@ -187,6 +198,7 @@ void lib_ring_buffer_backend_free(struct lib_ring_buffer_backend *bufb)
                num_subbuf_alloc++;
 
        kfree(bufb->buf_wsb);
+       kfree(bufb->buf_cnt);
        for (i = 0; i < num_subbuf_alloc; i++) {
                for (j = 0; j < bufb->num_pages_per_subbuf; j++)
                        __free_page(bufb->array[i]->p[j].page);