session: update fifo slice on session migration

[vpp.git] / src / svm / fifo_segment.h

diff --git a/src/svm/fifo_segment.h b/src/svm/fifo_segment.h
index 4e950f6..ee5c24d 100644 (file)
--- a/src/svm/fifo_segment.h
+++ b/src/svm/fifo_segment.h
@@ -120,6 +120,10 @@ svm_fifo_t *fifo_segment_alloc_fifo_w_slice (fifo_segment_t * fs,
  */
 void fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f);
 
+void fifo_segment_detach_fifo (fifo_segment_t * fs, svm_fifo_t * f);
+void fifo_segment_attach_fifo (fifo_segment_t * fs, svm_fifo_t * f,
+                              u32 slice_index);
+
 /**
  * Try to preallocate fifo headers
  *
@@ -164,11 +168,27 @@ void fifo_segment_preallocate_fifo_pairs (fifo_segment_t * fs,
                                          u32 tx_fifo_size,
                                          u32 * n_fifo_pairs);
 
+/**
+ * Allocate chunks in fifo segment
+ *
+ * @param fsh          fifo segment header
+ * @param slice_index  slice where chunks should be alocated
+ * @param chunk_size   chunk size needed
+ * @return             chunk (or chunks) that cover at least chunk_size bytes
+ *                     on success, 0 on failure.
+ */
 svm_fifo_chunk_t *fsh_alloc_chunk (fifo_segment_header_t * fsh,
                                   u32 slice_index, u32 chunk_size);
 
+/**
+ * Return chunks to fifo segment
+ *
+ * @param fsh          fifo segment header
+ * @param slice_index  slice where chunks should be returned
+ * @param c            pointer to first chunk in 0 terminated linked list
+ */
 void fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index,
-                        svm_fifo_chunk_t * cur);
+                        svm_fifo_chunk_t * c);
 
 /**
  * Fifo segment has reached mem limit
@@ -227,6 +247,8 @@ void fifo_segment_update_free_bytes (fifo_segment_t * fs);
  */
 uword fifo_segment_cached_bytes (fifo_segment_t * fs);
 
+uword fifo_segment_available_bytes (fifo_segment_t * fs);
+
 /**
  * Number of bytes on chunk free lists
  *