99a2dd955f
There is no reason for the DPDK libraries to all have 'librte_' prefix on the directory names. This prefix makes the directory names longer and also makes it awkward to add features referring to individual libraries in the build - should the lib names be specified with or without the prefix. Therefore, we can just remove the library prefix and use the library's unique name as the directory name, i.e. 'eal' rather than 'librte_eal' Signed-off-by: Bruce Richardson <bruce.richardson@intel.com>
125 lines
3.1 KiB
C
125 lines
3.1 KiB
C
/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2017 Intel Corporation
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*/
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#include <stdbool.h>
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#include <errno.h>
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#include <rte_memcpy.h>
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#include <rte_mempool.h>
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#include "gso_common.h"
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static inline void
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hdr_segment_init(struct rte_mbuf *hdr_segment, struct rte_mbuf *pkt,
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uint16_t pkt_hdr_offset)
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{
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/* Copy MBUF metadata */
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hdr_segment->nb_segs = 1;
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hdr_segment->port = pkt->port;
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hdr_segment->ol_flags = pkt->ol_flags;
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hdr_segment->packet_type = pkt->packet_type;
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hdr_segment->pkt_len = pkt_hdr_offset;
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hdr_segment->data_len = pkt_hdr_offset;
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hdr_segment->tx_offload = pkt->tx_offload;
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/* Copy the packet header */
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rte_memcpy(rte_pktmbuf_mtod(hdr_segment, char *),
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rte_pktmbuf_mtod(pkt, char *),
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pkt_hdr_offset);
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}
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static inline void
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free_gso_segment(struct rte_mbuf **pkts, uint16_t nb_pkts)
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{
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uint16_t i;
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for (i = 0; i < nb_pkts; i++)
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rte_pktmbuf_free(pkts[i]);
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}
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int
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gso_do_segment(struct rte_mbuf *pkt,
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uint16_t pkt_hdr_offset,
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uint16_t pyld_unit_size,
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struct rte_mempool *direct_pool,
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struct rte_mempool *indirect_pool,
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struct rte_mbuf **pkts_out,
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uint16_t nb_pkts_out)
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{
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struct rte_mbuf *pkt_in;
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struct rte_mbuf *hdr_segment, *pyld_segment, *prev_segment;
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uint16_t pkt_in_data_pos, segment_bytes_remaining;
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uint16_t pyld_len, nb_segs;
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bool more_in_pkt, more_out_segs;
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pkt_in = pkt;
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nb_segs = 0;
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more_in_pkt = 1;
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pkt_in_data_pos = pkt_hdr_offset;
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while (more_in_pkt) {
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if (unlikely(nb_segs >= nb_pkts_out)) {
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free_gso_segment(pkts_out, nb_segs);
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return -EINVAL;
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}
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/* Allocate a direct MBUF */
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hdr_segment = rte_pktmbuf_alloc(direct_pool);
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if (unlikely(hdr_segment == NULL)) {
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free_gso_segment(pkts_out, nb_segs);
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return -ENOMEM;
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}
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/* Fill the packet header */
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hdr_segment_init(hdr_segment, pkt, pkt_hdr_offset);
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prev_segment = hdr_segment;
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segment_bytes_remaining = pyld_unit_size;
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more_out_segs = 1;
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while (more_out_segs && more_in_pkt) {
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/* Allocate an indirect MBUF */
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pyld_segment = rte_pktmbuf_alloc(indirect_pool);
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if (unlikely(pyld_segment == NULL)) {
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rte_pktmbuf_free(hdr_segment);
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free_gso_segment(pkts_out, nb_segs);
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return -ENOMEM;
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}
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/* Attach to current MBUF segment of pkt */
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rte_pktmbuf_attach(pyld_segment, pkt_in);
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prev_segment->next = pyld_segment;
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prev_segment = pyld_segment;
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pyld_len = segment_bytes_remaining;
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if (pyld_len + pkt_in_data_pos > pkt_in->data_len)
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pyld_len = pkt_in->data_len - pkt_in_data_pos;
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pyld_segment->data_off = pkt_in_data_pos +
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pkt_in->data_off;
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pyld_segment->data_len = pyld_len;
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/* Update header segment */
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hdr_segment->pkt_len += pyld_len;
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hdr_segment->nb_segs++;
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pkt_in_data_pos += pyld_len;
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segment_bytes_remaining -= pyld_len;
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/* Finish processing a MBUF segment of pkt */
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if (pkt_in_data_pos == pkt_in->data_len) {
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pkt_in = pkt_in->next;
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pkt_in_data_pos = 0;
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if (pkt_in == NULL)
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more_in_pkt = 0;
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}
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/* Finish generating a GSO segment */
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if (segment_bytes_remaining == 0)
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more_out_segs = 0;
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}
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pkts_out[nb_segs++] = hdr_segment;
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}
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return nb_segs;
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}
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