diff options
Diffstat (limited to 'security/tomoyo/memory.c')
| -rw-r--r-- | security/tomoyo/memory.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/security/tomoyo/memory.c b/security/tomoyo/memory.c index 249835abdf4e..a1d75df93e16 100644 --- a/security/tomoyo/memory.c +++ b/security/tomoyo/memory.c @@ -89,6 +89,50 @@ void tomoyo_memory_free(void *ptr) kfree(ptr); } +/** + * tomoyo_get_group - Allocate memory for "struct tomoyo_path_group"/"struct tomoyo_number_group". + * + * @group_name: The name of address group. + * @idx: Index number. + * + * Returns pointer to "struct tomoyo_group" on success, NULL otherwise. + */ +struct tomoyo_group *tomoyo_get_group(const char *group_name, const u8 idx) +{ + struct tomoyo_group e = { }; + struct tomoyo_group *group = NULL; + bool found = false; + if (!tomoyo_correct_word(group_name) || idx >= TOMOYO_MAX_GROUP) + return NULL; + e.group_name = tomoyo_get_name(group_name); + if (!e.group_name) + return NULL; + if (mutex_lock_interruptible(&tomoyo_policy_lock)) + goto out; + list_for_each_entry(group, &tomoyo_group_list[idx], list) { + if (e.group_name != group->group_name) + continue; + atomic_inc(&group->users); + found = true; + break; + } + if (!found) { + struct tomoyo_group *entry = tomoyo_commit_ok(&e, sizeof(e)); + if (entry) { + INIT_LIST_HEAD(&entry->member_list); + atomic_set(&entry->users, 1); + list_add_tail_rcu(&entry->list, + &tomoyo_group_list[idx]); + group = entry; + found = true; + } + } + mutex_unlock(&tomoyo_policy_lock); + out: + tomoyo_put_name(e.group_name); + return found ? group : NULL; +} + /* * tomoyo_name_list is used for holding string data used by TOMOYO. * Since same string data is likely used for multiple times (e.g. |