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parser: Add aa_policy_cache function to replace all policies

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This may be useful for something like an init daemon that simply wants
to load all cached binaries without worrying about any sort of policy
compilation.

Signed-off-by: Tyler Hicks <tyhicks@canonical.com>
Acked-by: John Johansen <john.johansen@canonical.com>
This commit is contained in:
Tyler Hicks 2015-03-25 17:09:27 -05:00
parent 9aa29f4117
commit 7e218b758d
2 changed files with 64 additions and 0 deletions
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61
parser/policy_cache.c
View File

@ -249,6 +249,34 @@ static int init_cache_features(aa_policy_cache *policy_cache,
return 0;
}
struct replace_all_cb_data {
aa_policy_cache *policy_cache;
aa_kernel_interface *kernel_interface;
};
static int replace_all_cb(DIR *dir unused, const char *name, struct stat *st,
void *cb_data)
{
int retval = 0;
if (!S_ISDIR(st->st_mode) && !is_blacklisted(name, NULL)) {
struct replace_all_cb_data *data;
autofree char *path = NULL;
data = (struct replace_all_cb_data *) cb_data;
if (asprintf(&path, "%s/%s",
data->policy_cache->path, name) < 0) {
path = NULL;
errno = ENOMEM;
return -1;
}
retval = aa_kernel_interface_replace_policy_from_file(data->kernel_interface,
path);
}
return retval;
}
/**
* aa_policy_cache_new - create a new policy_cache from a path
* @policy_cache: will point to the address of an allocated and initialized
@ -368,3 +396,36 @@ int aa_policy_cache_remove(const char *path)
{
return dirat_for_each(NULL, path, NULL, clear_cache_cb);
}
/**
* aa_policy_cache_replace_all - performs a kernel policy replacement of all cached policies
* @policy_cache: the policy_cache
* @kernel_interface: the kernel interface to use when doing the replacement
*
* Returns: 0 on success, -1 on error with errno set and features pointing to
* NULL
*/
int aa_policy_cache_replace_all(aa_policy_cache *policy_cache,
aa_kernel_interface *kernel_interface)
{
struct replace_all_cb_data cb_data;
int retval;
if (kernel_interface) {
aa_kernel_interface_ref(kernel_interface);
} else if (aa_kernel_interface_new(&kernel_interface,
policy_cache->kernel_features,
NULL) == -1) {
kernel_interface = NULL;
return -1;
}
cb_data.policy_cache = policy_cache;
cb_data.kernel_interface = kernel_interface;
retval = dirat_for_each(NULL, policy_cache->path, &cb_data,
replace_all_cb);
aa_kernel_interface_unref(kernel_interface);
return retval;
}

3
parser/policy_cache.h
View File

@ -57,5 +57,8 @@ void aa_policy_cache_unref(aa_policy_cache *policy_cache);
bool aa_policy_cache_is_valid(aa_policy_cache *policy_cache);
int aa_policy_cache_create(aa_policy_cache *policy_cache);
int aa_policy_cache_remove(const char *path);
int aa_policy_cache_replace_all(aa_policy_cache *policy_cache,
aa_kernel_interface *kernel_interface);
#endif /* __AA_POLICY_CACHE_H */