cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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task.h (2069B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * AppArmor security module
      4 *
      5 * This file contains AppArmor task related definitions and mediation
      6 *
      7 * Copyright 2017 Canonical Ltd.
      8 */
      9
     10#ifndef __AA_TASK_H
     11#define __AA_TASK_H
     12
     13static inline struct aa_task_ctx *task_ctx(struct task_struct *task)
     14{
     15	return task->security + apparmor_blob_sizes.lbs_task;
     16}
     17
     18/*
     19 * struct aa_task_ctx - information for current task label change
     20 * @nnp: snapshot of label at time of no_new_privs
     21 * @onexec: profile to transition to on next exec  (MAY BE NULL)
     22 * @previous: profile the task may return to     (MAY BE NULL)
     23 * @token: magic value the task must know for returning to @previous_profile
     24 */
     25struct aa_task_ctx {
     26	struct aa_label *nnp;
     27	struct aa_label *onexec;
     28	struct aa_label *previous;
     29	u64 token;
     30};
     31
     32int aa_replace_current_label(struct aa_label *label);
     33int aa_set_current_onexec(struct aa_label *label, bool stack);
     34int aa_set_current_hat(struct aa_label *label, u64 token);
     35int aa_restore_previous_label(u64 cookie);
     36struct aa_label *aa_get_task_label(struct task_struct *task);
     37
     38/**
     39 * aa_free_task_ctx - free a task_ctx
     40 * @ctx: task_ctx to free (MAYBE NULL)
     41 */
     42static inline void aa_free_task_ctx(struct aa_task_ctx *ctx)
     43{
     44	if (ctx) {
     45		aa_put_label(ctx->nnp);
     46		aa_put_label(ctx->previous);
     47		aa_put_label(ctx->onexec);
     48	}
     49}
     50
     51/**
     52 * aa_dup_task_ctx - duplicate a task context, incrementing reference counts
     53 * @new: a blank task context      (NOT NULL)
     54 * @old: the task context to copy  (NOT NULL)
     55 */
     56static inline void aa_dup_task_ctx(struct aa_task_ctx *new,
     57				   const struct aa_task_ctx *old)
     58{
     59	*new = *old;
     60	aa_get_label(new->nnp);
     61	aa_get_label(new->previous);
     62	aa_get_label(new->onexec);
     63}
     64
     65/**
     66 * aa_clear_task_ctx_trans - clear transition tracking info from the ctx
     67 * @ctx: task context to clear (NOT NULL)
     68 */
     69static inline void aa_clear_task_ctx_trans(struct aa_task_ctx *ctx)
     70{
     71	AA_BUG(!ctx);
     72
     73	aa_put_label(ctx->previous);
     74	aa_put_label(ctx->onexec);
     75	ctx->previous = NULL;
     76	ctx->onexec = NULL;
     77	ctx->token = 0;
     78}
     79
     80#endif /* __AA_TASK_H */