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>
151 lines
2.9 KiB
C
151 lines
2.9 KiB
C
/* 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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/*
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* Check that user provided external symbol.
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*/
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static int
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bpf_check_xsym(const struct rte_bpf_xsym *xsym)
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{
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uint32_t i;
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if (xsym->name == NULL)
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return -EINVAL;
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if (xsym->type == RTE_BPF_XTYPE_VAR) {
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if (xsym->var.desc.type == RTE_BPF_ARG_UNDEF)
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return -EINVAL;
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} else if (xsym->type == RTE_BPF_XTYPE_FUNC) {
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if (xsym->func.nb_args > EBPF_FUNC_MAX_ARGS)
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return -EINVAL;
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/* check function arguments */
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for (i = 0; i != xsym->func.nb_args; i++) {
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if (xsym->func.args[i].type == RTE_BPF_ARG_UNDEF)
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return -EINVAL;
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}
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/* check return value info */
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if (xsym->func.ret.type != RTE_BPF_ARG_UNDEF &&
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xsym->func.ret.size == 0)
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return -EINVAL;
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} else
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return -EINVAL;
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return 0;
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}
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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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uint32_t i;
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if (prm == NULL || prm->ins == NULL ||
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(prm->nb_xsym != 0 && prm->xsym == NULL)) {
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rte_errno = EINVAL;
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return NULL;
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}
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rc = 0;
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for (i = 0; i != prm->nb_xsym && rc == 0; i++)
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rc = bpf_check_xsym(prm->xsym + i);
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if (rc != 0) {
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rte_errno = -rc;
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RTE_BPF_LOG(ERR, "%s: %d-th xsym is invalid\n", __func__, i);
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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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#ifndef RTE_LIBRTE_BPF_ELF
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struct rte_bpf *
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rte_bpf_elf_load(const struct rte_bpf_prm *prm, const char *fname,
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const char *sname)
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{
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if (prm == NULL || fname == NULL || sname == NULL) {
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rte_errno = EINVAL;
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return NULL;
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}
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RTE_BPF_LOG(ERR, "%s() is not supported with current config\n"
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"rebuild with libelf installed\n",
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__func__);
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rte_errno = ENOTSUP;
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return NULL;
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}
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#endif
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