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9f9dc69e06
Reduce the duplication between the lsm_id struct and the DEFINE_LSM() definition by linking the lsm_id struct directly into the individual LSM's DEFINE_LSM() instance. Linking the lsm_id into the LSM definition also allows us to simplify the security_add_hooks() function by removing the code which populates the lsm_idlist[] array and moving it into the normal LSM startup code where the LSM list is parsed and the individual LSMs are enabled, making for a cleaner implementation with less overhead at boot. Reviewed-by: Kees Cook <kees@kernel.org> Reviewed-by: John Johansen <john.johansen@canonical.com> Reviewed-by: Casey Schaufler <casey@schaufler-ca.com> Reviewed-by: Mimi Zohar <zohar@linux.ibm.com> Signed-off-by: Paul Moore <paul@paul-moore.com>
40 lines
895 B
C
40 lines
895 B
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Copyright (C) 2020 Google LLC.
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*/
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#include <linux/lsm_hooks.h>
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#include <linux/bpf_lsm.h>
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#include <uapi/linux/lsm.h>
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static struct security_hook_list bpf_lsm_hooks[] __ro_after_init = {
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#define LSM_HOOK(RET, DEFAULT, NAME, ...) \
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LSM_HOOK_INIT(NAME, bpf_lsm_##NAME),
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#include <linux/lsm_hook_defs.h>
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#undef LSM_HOOK
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LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free),
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};
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static const struct lsm_id bpf_lsmid = {
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.name = "bpf",
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.id = LSM_ID_BPF,
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};
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static int __init bpf_lsm_init(void)
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{
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security_add_hooks(bpf_lsm_hooks, ARRAY_SIZE(bpf_lsm_hooks),
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&bpf_lsmid);
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pr_info("LSM support for eBPF active\n");
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return 0;
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}
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struct lsm_blob_sizes bpf_lsm_blob_sizes __ro_after_init = {
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.lbs_inode = sizeof(struct bpf_storage_blob),
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};
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DEFINE_LSM(bpf) = {
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.id = &bpf_lsmid,
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.init = bpf_lsm_init,
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.blobs = &bpf_lsm_blob_sizes
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};
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