// SPDX-License-Identifier: GPL-2.0/* * Copyright (C) 2020-2024 Microsoft Corporation. All rights reserved. */#include <uapi/linux/lsm.h> #include "ipe.h"#include "eval.h"#include "hooks.h" extern const char *const ipe_boot_policy;bool ipe_enabled; static struct lsm_blob_sizes ipe_blobs __ro_after_init = {	.lbs_superblock = sizeof(struct ipe_superblock),#ifdef CONFIG_IPE_PROP_DM_VERITY	.lbs_bdev = sizeof(struct ipe_bdev),#endif /* CONFIG_IPE_PROP_DM_VERITY */#ifdef CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG	.lbs_inode = sizeof(struct ipe_inode),#endif /* CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG */}; static const struct lsm_id ipe_lsmid = {	.name = "ipe",	.id = LSM_ID_IPE,}; struct ipe_superblock *ipe_sb(const struct super_block *sb){	return sb->s_security + ipe_blobs.lbs_superblock;} #ifdef CONFIG_IPE_PROP_DM_VERITYstruct ipe_bdev *ipe_bdev(struct block_device *b){	return b->bd_security + ipe_blobs.lbs_bdev;}#endif /* CONFIG_IPE_PROP_DM_VERITY */ #ifdef CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIGstruct ipe_inode *ipe_inode(const struct inode *inode){	return inode->i_security + ipe_blobs.lbs_inode;}#endif /* CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG */ static struct security_hook_list ipe_hooks[] __ro_after_init = {	LSM_HOOK_INIT(bprm_check_security, ipe_bprm_check_security),	LSM_HOOK_INIT(bprm_creds_for_exec, ipe_bprm_creds_for_exec),	LSM_HOOK_INIT(mmap_file, ipe_mmap_file),	LSM_HOOK_INIT(file_mprotect, ipe_file_mprotect),	LSM_HOOK_INIT(kernel_read_file, ipe_kernel_read_file),	LSM_HOOK_INIT(kernel_load_data, ipe_kernel_load_data),	LSM_HOOK_INIT(initramfs_populated, ipe_unpack_initramfs),#ifdef CONFIG_IPE_PROP_DM_VERITY	LSM_HOOK_INIT(bdev_free_security, ipe_bdev_free_security),	LSM_HOOK_INIT(bdev_setintegrity, ipe_bdev_setintegrity),#endif /* CONFIG_IPE_PROP_DM_VERITY */#ifdef CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG	LSM_HOOK_INIT(inode_setintegrity, ipe_inode_setintegrity),#endif /* CONFIG_IPE_PROP_FS_VERITY_BUILTIN_SIG */}; /** * ipe_init() - Entry point of IPE. * * This is called at LSM init, which happens occurs early during kernel * start up. During this phase, IPE registers its hooks and loads the * builtin boot policy. * * Return: * * %0		- OK * * %-ENOMEM	- Out of memory (OOM) */static int __init ipe_init(void){	struct ipe_policy *p = NULL; 	security_add_hooks(ipe_hooks, ARRAY_SIZE(ipe_hooks), &ipe_lsmid);	ipe_enabled = true; 	if (ipe_boot_policy) {		p = ipe_new_policy(ipe_boot_policy, strlen(ipe_boot_policy),				   NULL, 0);		if (IS_ERR(p))			return PTR_ERR(p); 		rcu_assign_pointer(ipe_active_policy, p);	} 	return 0;} DEFINE_LSM(ipe) = {	.id = &ipe_lsmid,	.init = ipe_init,	.blobs = &ipe_blobs,	.initcall_fs = ipe_init_securityfs,};