/* SPDX-License-Identifier: GPL-2.0-only *//* * AppArmor security module * * This file contains AppArmor policy definitions. * * Copyright (C) 1998-2008 Novell/SUSE * Copyright 2009-2010 Canonical Ltd. */ #ifndef __AA_POLICY_H#define __AA_POLICY_H #include <linux/capability.h>#include <linux/cred.h>#include <linux/kref.h>#include <linux/rhashtable.h>#include <linux/sched.h>#include <linux/slab.h>#include <linux/socket.h> #include "apparmor.h"#include "audit.h"#include "capability.h"#include "domain.h"#include "file.h"#include "lib.h"#include "label.h"#include "net.h"#include "perms.h"#include "resource.h"  struct aa_ns; extern int unprivileged_userns_apparmor_policy; extern const char *const aa_profile_mode_names[];#define APPARMOR_MODE_NAMES_MAX_INDEX 4 #define PROFILE_MODE(_profile, _mode)		\	((aa_g_profile_mode == (_mode)) ||	\	 ((_profile)->mode == (_mode))) #define COMPLAIN_MODE(_profile)	PROFILE_MODE((_profile), APPARMOR_COMPLAIN) #define KILL_MODE(_profile) PROFILE_MODE((_profile), APPARMOR_KILL) #define PROFILE_IS_HAT(_profile) ((_profile)->label.flags & FLAG_HAT) #define profile_is_stale(_profile) (label_is_stale(&(_profile)->label)) #define on_list_rcu(X) (!list_empty(X) && (X)->prev != LIST_POISON2) /* * FIXME: currently need a clean way to replace and remove profiles as a * set.  It should be done at the namespace level. * Either, with a set of profiles loaded at the namespace level or via * a mark and remove marked interface. */enum profile_mode {	APPARMOR_ENFORCE,	/* enforce access rules */	APPARMOR_COMPLAIN,	/* allow and log access violations */	APPARMOR_KILL,		/* kill task on access violation */	APPARMOR_UNCONFINED,	/* profile set to unconfined */};  /* struct aa_policydb - match engine for a policy * dfa: dfa pattern match * start: set of start states for the different classes of data */struct aa_policydb {	/* Generic policy DFA specific rule types will be subsections of it */	struct aa_dfa *dfa;	unsigned int start[AA_CLASS_LAST + 1]; }; /* struct aa_data - generic data structure * key: name for retrieving this data * size: size of data in bytes * data: binary data * head: reserved for rhashtable */struct aa_data {	char *key;	u32 size;	char *data;	struct rhash_head head;};  /* struct aa_profile - basic confinement data * @base - base components of the profile (name, refcount, lists, lock ...) * @label - label this profile is an extension of * @parent: parent of profile * @ns: namespace the profile is in * @rename: optional profile name that this profile renamed * @attach: human readable attachment string * @xmatch: optional extended matching for unconfined executables names * @xmatch_len: xmatch prefix len, used to determine xmatch priority * @audit: the auditing mode of the profile * @mode: the enforcement mode of the profile * @path_flags: flags controlling path generation behavior * @disconnected: what to prepend if attach_disconnected is specified * @size: the memory consumed by this profiles rules * @policy: general match rules governing policy * @file: The set of rules governing basic file access and domain transitions * @caps: capabilities for the profile * @rlimits: rlimits for the profile * * @dents: dentries for the profiles file entries in apparmorfs * @dirname: name of the profile dir in apparmorfs * @data: hashtable for free-form policy aa_data * * The AppArmor profile contains the basic confinement data.  Each profile * has a name, and exists in a namespace.  The @name and @exec_match are * used to determine profile attachment against unconfined tasks.  All other * attachments are determined by profile X transition rules. * * Profiles have a hierarchy where hats and children profiles keep * a reference to their parent. * * Profile names can not begin with a : and can not contain the \0 * character.  If a profile name begins with / it will be considered when * determining profile attachment on "unconfined" tasks. */struct aa_profile {	struct aa_policy base;	struct aa_profile __rcu *parent; 	struct aa_ns *ns;	const char *rename; 	const char *attach;	struct aa_dfa *xmatch;	int xmatch_len;	enum audit_mode audit;	long mode;	u32 path_flags;	const char *disconnected;	int size; 	struct aa_policydb policy;	struct aa_file_rules file;	struct aa_caps caps; 	int xattr_count;	char **xattrs; 	struct aa_rlimit rlimits; 	int secmark_count;	struct aa_secmark *secmark; 	struct aa_loaddata *rawdata;	unsigned char *hash;	char *dirname;	struct dentry *dents[AAFS_PROF_SIZEOF];	struct rhashtable *data;	struct aa_label label;}; extern enum profile_mode aa_g_profile_mode; #define AA_MAY_LOAD_POLICY	AA_MAY_APPEND#define AA_MAY_REPLACE_POLICY	AA_MAY_WRITE#define AA_MAY_REMOVE_POLICY	AA_MAY_DELETE #define profiles_ns(P) ((P)->ns)#define name_is_shared(A, B) ((A)->hname && (A)->hname == (B)->hname) void aa_add_profile(struct aa_policy *common, struct aa_profile *profile);  void aa_free_proxy_kref(struct kref *kref);struct aa_profile *aa_alloc_profile(const char *name, struct aa_proxy *proxy,				    gfp_t gfp);struct aa_profile *aa_new_null_profile(struct aa_profile *parent, bool hat,				       const char *base, gfp_t gfp);void aa_free_profile(struct aa_profile *profile);void aa_free_profile_kref(struct kref *kref);struct aa_profile *aa_find_child(struct aa_profile *parent, const char *name);struct aa_profile *aa_lookupn_profile(struct aa_ns *ns, const char *hname,				      size_t n);struct aa_profile *aa_lookup_profile(struct aa_ns *ns, const char *name);struct aa_profile *aa_fqlookupn_profile(struct aa_label *base,					const char *fqname, size_t n);struct aa_profile *aa_match_profile(struct aa_ns *ns, const char *name); ssize_t aa_replace_profiles(struct aa_ns *view, struct aa_label *label,			    u32 mask, struct aa_loaddata *udata);ssize_t aa_remove_profiles(struct aa_ns *view, struct aa_label *label,			   char *name, size_t size);void __aa_profile_list_release(struct list_head *head); #define PROF_ADD 1#define PROF_REPLACE 0 #define profile_unconfined(X) ((X)->mode == APPARMOR_UNCONFINED) /** * aa_get_newest_profile - simple wrapper fn to wrap the label version * @p: profile (NOT NULL) * * Returns refcount to newest version of the profile (maybe @p) * * Requires: @p must be held with a valid refcount */static inline struct aa_profile *aa_get_newest_profile(struct aa_profile *p){	return labels_profile(aa_get_newest_label(&p->label));} static inline unsigned int PROFILE_MEDIATES(struct aa_profile *profile,					    unsigned char class){	if (class <= AA_CLASS_LAST)		return profile->policy.start[class];	else		return aa_dfa_match_len(profile->policy.dfa,					profile->policy.start[0], &class, 1);} static inline unsigned int PROFILE_MEDIATES_AF(struct aa_profile *profile,					       u16 AF) {	unsigned int state = PROFILE_MEDIATES(profile, AA_CLASS_NET);	__be16 be_af = cpu_to_be16(AF); 	if (!state)		return 0;	return aa_dfa_match_len(profile->policy.dfa, state, (char *) &be_af, 2);} /** * aa_get_profile - increment refcount on profile @p * @p: profile  (MAYBE NULL) * * Returns: pointer to @p if @p is NULL will return NULL * Requires: @p must be held with valid refcount when called */static inline struct aa_profile *aa_get_profile(struct aa_profile *p){	if (p)		kref_get(&(p->label.count)); 	return p;} /** * aa_get_profile_not0 - increment refcount on profile @p found via lookup * @p: profile  (MAYBE NULL) * * Returns: pointer to @p if @p is NULL will return NULL * Requires: @p must be held with valid refcount when called */static inline struct aa_profile *aa_get_profile_not0(struct aa_profile *p){	if (p && kref_get_unless_zero(&p->label.count))		return p; 	return NULL;} /** * aa_get_profile_rcu - increment a refcount profile that can be replaced * @p: pointer to profile that can be replaced (NOT NULL) * * Returns: pointer to a refcounted profile. *     else NULL if no profile */static inline struct aa_profile *aa_get_profile_rcu(struct aa_profile __rcu **p){	struct aa_profile *c; 	rcu_read_lock();	do {		c = rcu_dereference(*p);	} while (c && !kref_get_unless_zero(&c->label.count));	rcu_read_unlock(); 	return c;} /** * aa_put_profile - decrement refcount on profile @p * @p: profile  (MAYBE NULL) */static inline void aa_put_profile(struct aa_profile *p){	if (p)		kref_put(&p->label.count, aa_label_kref);} static inline int AUDIT_MODE(struct aa_profile *profile){	if (aa_g_audit != AUDIT_NORMAL)		return aa_g_audit; 	return profile->audit;} bool policy_view_capable(struct aa_ns *ns);bool policy_admin_capable(struct aa_ns *ns);int aa_may_manage_policy(struct aa_label *label, struct aa_ns *ns,			 u32 mask); #endif /* __AA_POLICY_H */