diff options
Diffstat (limited to 'hicn-plugin/src/data_fwd.h')
| -rw-r--r-- | hicn-plugin/src/data_fwd.h | 54 |
1 files changed, 26 insertions, 28 deletions
diff --git a/hicn-plugin/src/data_fwd.h b/hicn-plugin/src/data_fwd.h index d95f564c3..96d8399e4 100644 --- a/hicn-plugin/src/data_fwd.h +++ b/hicn-plugin/src/data_fwd.h @@ -24,23 +24,25 @@ * @file data_fwd.h * * This is the node encoutered by data packets after the hicn-data-pcslookup. - * This node has two goals: 1) clone/copy the vlib buffer as many time as the number - * of faces stored in the pit entry, 2) store a clone/copy of the vlib buffer in the CS. - * Unless there are memory issue (no more vlib buffer available to perform cloning/copy), - * a single vlib buffer received might results in several vlib buffer sent to the next - * vlib node (hicn4-iface-output or hicn6-iface-output). + * This node has two goals: 1) clone/copy the vlib buffer as many time as the + * number of faces stored in the pit entry, 2) store a clone/copy of the vlib + * buffer in the CS. Unless there are memory issue (no more vlib buffer + * available to perform cloning/copy), a single vlib buffer received might + * results in several vlib buffer sent to the next vlib node + * (hicn4-iface-output or hicn6-iface-output). * - * It must be noted that cloning is possible only if the lentgh of the data pointed by - * the vlib buffer is at least 256 bytes. This is due to an imposition in the vpp source - * code. In all the other cases the vlib buffer is copied. Cloning is performed by advancing - * the vlib buffer of 256 bytes and a new vlib buffer is created and chained in from of the received - * buffer. Additionally, the 256 bytes removed (advanced) from the received vlib buffer are - * copied in the head vlib buffer. In case of multiple cloning for the same vlib buffer, this - * mechanism allows us to have a different hICN header for each clone (+ the same additional bytes - * due to the vpp restriction on cloning). + * It must be noted that cloning is possible only if the lentgh of the data + * pointed by the vlib buffer is at least 256 bytes. This is due to an + * imposition in the vpp source code. In all the other cases the vlib buffer is + * copied. Cloning is performed by advancing the vlib buffer of 256 bytes and a + * new vlib buffer is created and chained in from of the received buffer. + * Additionally, the 256 bytes removed (advanced) from the received vlib buffer + * are copied in the head vlib buffer. In case of multiple cloning for the same + * vlib buffer, this mechanism allows us to have a different hICN header for + * each clone (+ the same additional bytes due to the vpp restriction on + * cloning). */ - /* Trace context struct */ typedef struct { @@ -76,7 +78,7 @@ typedef enum * less than the number requested or zero */ always_inline u16 -vlib_buffer_clone_256_2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, +vlib_buffer_clone_256_2 (vlib_main_t *vm, u32 src_buffer, u32 *buffers, u16 n_buffers, u16 head_end_offset) { u16 i; @@ -97,8 +99,8 @@ vlib_buffer_clone_256_2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, } return n_buffers; } - n_buffers = vlib_buffer_alloc_from_pool (vm, buffers, n_buffers, - s->buffer_pool_index); + n_buffers = + vlib_buffer_alloc_from_pool (vm, buffers, n_buffers, s->buffer_pool_index); for (i = 0; i < n_buffers; i++) { @@ -107,8 +109,8 @@ vlib_buffer_clone_256_2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, d->current_length = head_end_offset; d->trace_handle = s->trace_handle; - d->total_length_not_including_first_buffer = s->current_length - - head_end_offset; + d->total_length_not_including_first_buffer = + s->current_length - head_end_offset; if (PREDICT_FALSE (s->flags & VLIB_BUFFER_NEXT_PRESENT)) { d->total_length_not_including_first_buffer += @@ -149,7 +151,7 @@ vlib_buffer_clone_256_2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, * less than the number requested or zero */ always_inline u16 -vlib_buffer_clone2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, +vlib_buffer_clone2 (vlib_main_t *vm, u32 src_buffer, u32 *buffers, u16 n_buffers, u16 head_end_offset) { vlib_buffer_t *s = vlib_get_buffer (vm, src_buffer); @@ -174,11 +176,9 @@ vlib_buffer_clone2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, vlib_buffer_t *copy; /* Ok to call the original vlib_buffer_copy. */ copy = vlib_buffer_copy (vm, s); - n_cloned += vlib_buffer_clone (vm, - vlib_get_buffer_index (vm, copy), - buffers, - n_buffers - n_clone_src, - head_end_offset); + n_cloned += + vlib_buffer_clone (vm, vlib_get_buffer_index (vm, copy), buffers, + n_buffers - n_clone_src, head_end_offset); n_buffers -= n_cloned; } /* @@ -195,9 +195,7 @@ vlib_buffer_clone2 (vlib_main_t * vm, u32 src_buffer, u32 * buffers, * complexity to the code, especially because we need to add 1 to * ref_count when the packet is cloned. */ - n_cloned += vlib_buffer_clone_256_2 (vm, - src_buffer, - (buffers + n_cloned), + n_cloned += vlib_buffer_clone_256_2 (vm, src_buffer, (buffers + n_cloned), n_buffers, head_end_offset); s->ref_count += (tmp_ref_count - 1); |