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apparmor: move task related defines and fns to task.X files

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Signed-off-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
John Johansen 2017-10-08 00:43:02 -07:00
parent d065f2f565
commit de62de59c2
6 changed files with 105 additions and 98 deletions
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90
security/apparmor/include/task.h Normal file
View file

@ -0,0 +1,90 @@
/*
* AppArmor security module
*
* This file contains AppArmor task related definitions and mediation
*
* Copyright 2017 Canonical Ltd.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation, version 2 of the
* License.
*/
#ifndef __AA_TASK_H
#define __AA_TASK_H
#define task_ctx(X) ((X)->security)
/*
* struct aa_task_ctx - information for current task label change
* @onexec: profile to transition to on next exec (MAY BE NULL)
* @previous: profile the task may return to (MAY BE NULL)
* @token: magic value the task must know for returning to @previous_profile
*/
struct aa_task_ctx {
struct aa_label *onexec;
struct aa_label *previous;
u64 token;
};
int aa_replace_current_label(struct aa_label *label);
int aa_set_current_onexec(struct aa_label *label, bool stack);
int aa_set_current_hat(struct aa_label *label, u64 token);
int aa_restore_previous_label(u64 cookie);
struct aa_label *aa_get_task_label(struct task_struct *task);
/**
* aa_alloc_task_ctx - allocate a new task_ctx
* @flags: gfp flags for allocation
*
* Returns: allocated buffer or NULL on failure
*/
static inline struct aa_task_ctx *aa_alloc_task_ctx(gfp_t flags)
{
return kzalloc(sizeof(struct aa_task_ctx), flags);
}
/**
* aa_free_task_ctx - free a task_ctx
* @ctx: task_ctx to free (MAYBE NULL)
*/
static inline void aa_free_task_ctx(struct aa_task_ctx *ctx)
{
if (ctx) {
aa_put_label(ctx->previous);
aa_put_label(ctx->onexec);
kzfree(ctx);
}
}
/**
* aa_dup_task_ctx - duplicate a task context, incrementing reference counts
* @new: a blank task context (NOT NULL)
* @old: the task context to copy (NOT NULL)
*/
static inline void aa_dup_task_ctx(struct aa_task_ctx *new,
const struct aa_task_ctx *old)
{
*new = *old;
aa_get_label(new->previous);
aa_get_label(new->onexec);
}
/**
* aa_clear_task_ctx_trans - clear transition tracking info from the ctx
* @ctx: task context to clear (NOT NULL)
*/
static inline void aa_clear_task_ctx_trans(struct aa_task_ctx *ctx)
{
AA_BUG(!ctx);
aa_put_label(ctx->previous);
aa_put_label(ctx->onexec);
ctx->previous = NULL;
ctx->onexec = NULL;
ctx->token = 0;
}
#endif /* __AA_TASK_H */