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e3fca60d11
This enables adding a priority to a rules in policy, finishing out the
priority work done to plumb priority support through the internals in
the previous patch.
Rules have a default priority of 0. The priority prefix can be added
before the other currently support rule prefixes, ie.
[priority prefix][audit qualifier][rule mode][owner]
If present a numerical priority can be assigned to the rule, where the
greater the number the higher the priority. Eg.
priority=1 audit file r /etc/passwd,
priority=-1 deny file w /etc/**,
Rule priority allows the rule with the highest priority to completely
override lower priority rules where they overlap. Within a given
priority level rules will accumulate in standard apparmor fashion.
Eg. given
priority=1 w /*c,
priority=0 r /a*,
priority=-1 k /*b*,
/abc, /bc, /ac .. will have permissions of w
/ab, /abb, /aaa, .. will have permissions of r
/b, /bcb, /bab, .. will have permissions of k
User specified rule priorities are currently capped at the arbitrary
values of 1000, and -1000.
Notes:
* not all rule types support the priority prefix. Rukes like
- network
- capability
- rlimits need to be reworked
need to be reworked to properly preserve the policy rule structure.
* this patch does not support priority on rule blocks
* this patch does not support using a variable in the priority value.
Signed-off-by: John Johansen <john.johansen@canonical.com>
72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* Copyright (c) 2023
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* Canonical Ltd. (All rights reserved)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of version 2 of the GNU General Public
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* License published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, contact Canonical Ltd.
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*/
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#ifndef __AA_ALL_H
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#define __AA_ALL_H
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#include "rule.h"
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#define AA_IO_URING_OVERRIDE_CREDS AA_MAY_APPEND
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#define AA_IO_URING_SQPOLL AA_MAY_CREATE
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#define AA_VALID_IO_URING_PERMS (AA_IO_URING_OVERRIDE_CREDS | \
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AA_IO_URING_SQPOLL)
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class all_rule: public prefix_rule_t {
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void move_conditionals(struct cond_entry *conds);
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public:
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all_rule(void): prefix_rule_t(RULE_TYPE_ALL) { }
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virtual bool valid_prefix(const prefixes &p, const char *&error) {
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if (p.priority != 0) {
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error = _("priority prefix not allowed on all rules");
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return false;
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}
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if (p.owner) {
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error = _("owner prefix not allowed on all rules");
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return false;
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}
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return true;
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};
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int expand_variables(void)
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{
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return 0;
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}
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virtual ostream &dump(ostream &os) {
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prefix_rule_t::dump(os);
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os << "all";
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return os;
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}
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virtual bool is_mergeable(void) { return true; }
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virtual int cmp(rule_t const &rhs) const
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{
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return prefix_rule_t::cmp(rhs);
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};
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virtual void add_implied_rules(Profile &prof);
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virtual int gen_policy_re(Profile &prof unused) { return RULE_OK; };
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protected:
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virtual void warn_once(const char *name unused, const char *msg unused) { };
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virtual void warn_once(const char *name unused) { };
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};
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#endif /* __AA_ALL_H */
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