86 lines
1.5 KiB
C
86 lines
1.5 KiB
C
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/* SPDX-License-Identifier: BSD-3-Clause
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* Copyright(c) 2018 Intel Corporation
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*/
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#include <stdarg.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <stdint.h>
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#include <unistd.h>
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#include <inttypes.h>
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#include <rte_common.h>
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#include <rte_log.h>
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#include <rte_debug.h>
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#include <rte_memory.h>
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#include <rte_eal.h>
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#include <rte_byteorder.h>
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#include <rte_errno.h>
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#include "bpf_impl.h"
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static struct rte_bpf *
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bpf_load(const struct rte_bpf_prm *prm)
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{
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uint8_t *buf;
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struct rte_bpf *bpf;
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size_t sz, bsz, insz, xsz;
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xsz = prm->nb_xsym * sizeof(prm->xsym[0]);
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insz = prm->nb_ins * sizeof(prm->ins[0]);
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bsz = sizeof(bpf[0]);
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sz = insz + xsz + bsz;
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buf = mmap(NULL, sz, PROT_READ | PROT_WRITE,
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MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
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if (buf == MAP_FAILED)
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return NULL;
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bpf = (void *)buf;
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bpf->sz = sz;
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memcpy(&bpf->prm, prm, sizeof(bpf->prm));
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memcpy(buf + bsz, prm->xsym, xsz);
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memcpy(buf + bsz + xsz, prm->ins, insz);
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bpf->prm.xsym = (void *)(buf + bsz);
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bpf->prm.ins = (void *)(buf + bsz + xsz);
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return bpf;
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}
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__rte_experimental struct rte_bpf *
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rte_bpf_load(const struct rte_bpf_prm *prm)
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{
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struct rte_bpf *bpf;
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int32_t rc;
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if (prm == NULL || prm->ins == NULL) {
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rte_errno = EINVAL;
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return NULL;
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}
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bpf = bpf_load(prm);
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if (bpf == NULL) {
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rte_errno = ENOMEM;
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return NULL;
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}
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rc = bpf_validate(bpf);
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if (rc == 0) {
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bpf_jit(bpf);
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if (mprotect(bpf, bpf->sz, PROT_READ) != 0)
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rc = -ENOMEM;
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}
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if (rc != 0) {
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rte_bpf_destroy(bpf);
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rte_errno = -rc;
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return NULL;
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}
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return bpf;
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}
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