/* SPDX-License-Identifier: GPL-2.0-only *//* * AppArmor security module * * This file contains AppArmor file mediation function definitions. * * Copyright (C) 1998-2008 Novell/SUSE * Copyright 2009-2010 Canonical Ltd. */ #ifndef __AA_FILE_H#define __AA_FILE_H #include <linux/spinlock.h> #include "domain.h"#include "match.h"#include "perms.h" struct aa_policydb;struct aa_profile;struct path; #define mask_mode_t(X) (X & (MAY_EXEC | MAY_WRITE | MAY_READ | MAY_APPEND)) #define AA_AUDIT_FILE_MASK	(MAY_READ | MAY_WRITE | MAY_EXEC | MAY_APPEND |\				 AA_MAY_CREATE | AA_MAY_DELETE |	\				 AA_MAY_GETATTR | AA_MAY_SETATTR | \				 AA_MAY_CHMOD | AA_MAY_CHOWN | AA_MAY_LOCK | \				 AA_EXEC_MMAP | AA_MAY_LINK) static inline struct aa_file_ctx *file_ctx(struct file *file){	return file->f_security + apparmor_blob_sizes.lbs_file;} /* struct aa_file_ctx - the AppArmor context the file was opened in * @lock: lock to update the ctx * @label: label currently cached on the ctx * @perms: the permission the file was opened with */struct aa_file_ctx {	spinlock_t lock;	struct aa_label __rcu *label;	u32 allow;}; /** * aa_alloc_file_ctx - allocate file_ctx * @label: initial label of task creating the file * @gfp: gfp flags for allocation * * Returns: file_ctx or NULL on failure */static inline struct aa_file_ctx *aa_alloc_file_ctx(struct aa_label *label,						    gfp_t gfp){	struct aa_file_ctx *ctx; 	ctx = kzalloc(sizeof(struct aa_file_ctx), gfp);	if (ctx) {		spin_lock_init(&ctx->lock);		rcu_assign_pointer(ctx->label, aa_get_label(label));	}	return ctx;} /** * aa_free_file_ctx - free a file_ctx * @ctx: file_ctx to free  (MAYBE_NULL) */static inline void aa_free_file_ctx(struct aa_file_ctx *ctx){	if (ctx) {		aa_put_label(rcu_access_pointer(ctx->label));		kfree_sensitive(ctx);	}} static inline struct aa_label *aa_get_file_label(struct aa_file_ctx *ctx){	return aa_get_label_rcu(&ctx->label);} /* * The xindex is broken into 3 parts * - index - an index into either the exec name table or the variable table * - exec type - which determines how the executable name and index are used * - flags - which modify how the destination name is applied */#define AA_X_INDEX_MASK		AA_INDEX_MASK #define AA_X_TYPE_MASK		0x0c000000#define AA_X_NONE		AA_INDEX_NONE#define AA_X_NAME		0x04000000 /* use executable name px */#define AA_X_TABLE		0x08000000 /* use a specified name ->n# */ #define AA_X_UNSAFE		0x10000000#define AA_X_CHILD		0x20000000#define AA_X_INHERIT		0x40000000#define AA_X_UNCONFINED		0x80000000 /* need to make conditional which ones are being set */struct path_cond {	kuid_t uid;	umode_t mode;}; #define COMBINED_PERM_MASK(X) ((X).allow | (X).audit | (X).quiet | (X).kill) int aa_audit_file(struct aa_profile *profile, struct aa_perms *perms,		  const char *op, u32 request, const char *name,		  const char *target, struct aa_label *tlabel, kuid_t ouid,		  const char *info, int error); struct aa_perms *aa_lookup_fperms(struct aa_policydb *file_rules,				  aa_state_t state, struct path_cond *cond);aa_state_t aa_str_perms(struct aa_policydb *file_rules, aa_state_t start,			const char *name, struct path_cond *cond,			struct aa_perms *perms); int aa_path_perm(const char *op, struct aa_label *label,		 const struct path *path, int flags, u32 request,		 struct path_cond *cond); int aa_path_link(struct aa_label *label, struct dentry *old_dentry,		 const struct path *new_dir, struct dentry *new_dentry); int aa_file_perm(const char *op, struct aa_label *label, struct file *file,		 u32 request, bool in_atomic); void aa_inherit_files(const struct cred *cred, struct files_struct *files);  /** * aa_map_file_perms - map file flags to AppArmor permissions * @file: open file to map flags to AppArmor permissions * * Returns: apparmor permission set for the file */static inline u32 aa_map_file_to_perms(struct file *file){	int flags = file->f_flags;	u32 perms = 0; 	if (file->f_mode & FMODE_WRITE)		perms |= MAY_WRITE;	if (file->f_mode & FMODE_READ)		perms |= MAY_READ; 	if ((flags & O_APPEND) && (perms & MAY_WRITE))		perms = (perms & ~MAY_WRITE) | MAY_APPEND;	/* trunc implies write permission */	if (flags & O_TRUNC)		perms |= MAY_WRITE;	if (flags & O_CREAT)		perms |= AA_MAY_CREATE; 	return perms;} #endif /* __AA_FILE_H */