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TOMOYO: Add ACL group support.

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ACL group allows administrator to globally grant not only "file read"
permission but also other permissions.

Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Signed-off-by: James Morris <jmorris@namei.org>
This commit is contained in:
Tetsuo Handa
2011-06-26 23:19:28 +09:00
committed by James Morris
parent eadd99cc85
commit 32997144fd
5 changed files with 88 additions and 11 deletions
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51
security/tomoyo/common.c
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@@ -896,6 +896,12 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
domain->profile = (u8) profile;
return 0;
}
if (sscanf(data, "use_group %u\n", &profile) == 1
&& profile < TOMOYO_MAX_ACL_GROUPS) {
if (!is_delete)
domain->group = (u8) profile;
return 0;
}
if (!strcmp(data, "quota_exceeded")) {
domain->quota_warned = !is_delete;
return 0;
@@ -908,7 +914,7 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
}
/**
* tomoyo_set_group - Print category name.
* tomoyo_set_group - Print "acl_group " header keyword and category name.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @category: Category name.
@@ -918,6 +924,9 @@ static int tomoyo_write_domain(struct tomoyo_io_buffer *head)
static void tomoyo_set_group(struct tomoyo_io_buffer *head,
const char *category)
{
if (head->type == TOMOYO_EXCEPTIONPOLICY)
tomoyo_io_printf(head, "acl_group %u ",
head->r.acl_group_index);
tomoyo_set_string(head, category);
}
@@ -1041,17 +1050,17 @@ static bool tomoyo_print_entry(struct tomoyo_io_buffer *head,
/**
* tomoyo_read_domain2 - Read domain policy.
*
* @head: Pointer to "struct tomoyo_io_buffer".
* @domain: Pointer to "struct tomoyo_domain_info".
* @head: Pointer to "struct tomoyo_io_buffer".
* @list: Pointer to "struct list_head".
*
* Caller holds tomoyo_read_lock().
*
* Returns true on success, false otherwise.
*/
static bool tomoyo_read_domain2(struct tomoyo_io_buffer *head,
struct tomoyo_domain_info *domain)
struct list_head *list)
{
list_for_each_cookie(head->r.acl, &domain->acl_info_list) {
list_for_each_cookie(head->r.acl, list) {
struct tomoyo_acl_info *ptr =
list_entry(head->r.acl, typeof(*ptr), list);
if (!tomoyo_print_entry(head, ptr))
@@ -1085,6 +1094,8 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
tomoyo_set_lf(head);
tomoyo_io_printf(head, "use_profile %u\n",
domain->profile);
tomoyo_io_printf(head, "use_group %u\n",
domain->group);
if (domain->quota_warned)
tomoyo_set_string(head, "quota_exceeded\n");
if (domain->transition_failed)
@@ -1093,7 +1104,7 @@ static void tomoyo_read_domain(struct tomoyo_io_buffer *head)
tomoyo_set_lf(head);
/* fall through */
case 1:
if (!tomoyo_read_domain2(head, domain))
if (!tomoyo_read_domain2(head, &domain->acl_info_list))
return;
head->r.step++;
if (!tomoyo_set_lf(head))
@@ -1262,6 +1273,14 @@ static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
};
u8 i;
param.is_delete = tomoyo_str_starts(&param.data, "delete ");
if (!param.is_delete && tomoyo_str_starts(&param.data, "select ") &&
!strcmp(param.data, "execute_only")) {
head->r.print_execute_only = true;
return 0;
}
/* Don't allow updating policies by non manager programs. */
if (!tomoyo_manager())
return -EPERM;
if (tomoyo_str_starts(&param.data, "aggregator "))
return tomoyo_write_aggregator(&param);
for (i = 0; i < TOMOYO_MAX_TRANSITION_TYPE; i++)
@@ -1270,6 +1289,14 @@ static int tomoyo_write_exception(struct tomoyo_io_buffer *head)
for (i = 0; i < TOMOYO_MAX_GROUP; i++)
if (tomoyo_str_starts(&param.data, tomoyo_group_name[i]))
return tomoyo_write_group(&param, i);
if (tomoyo_str_starts(&param.data, "acl_group ")) {
unsigned int group;
char *data;
group = simple_strtoul(param.data, &data, 10);
if (group < TOMOYO_MAX_ACL_GROUPS && *data++ == ' ')
return tomoyo_write_domain2(&tomoyo_acl_group[group],
data, param.is_delete);
}
return -EINVAL;
}
@@ -1392,6 +1419,15 @@ static void tomoyo_read_exception(struct tomoyo_io_buffer *head)
head->r.step++;
if (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP)
return;
while (head->r.step < TOMOYO_MAX_POLICY + TOMOYO_MAX_GROUP
+ TOMOYO_MAX_ACL_GROUPS) {
head->r.acl_group_index = head->r.step - TOMOYO_MAX_POLICY
- TOMOYO_MAX_GROUP;
if (!tomoyo_read_domain2(head, &tomoyo_acl_group
[head->r.acl_group_index]))
return;
head->r.step++;
}
head->r.eof = true;
}
@@ -1914,7 +1950,8 @@ int tomoyo_write_control(struct tomoyo_io_buffer *head,
return -EFAULT;
/* Don't allow updating policies by non manager programs. */
if (head->write != tomoyo_write_pid &&
head->write != tomoyo_write_domain && !tomoyo_manager())
head->write != tomoyo_write_domain &&
head->write != tomoyo_write_exception && !tomoyo_manager())
return -EPERM;
if (mutex_lock_interruptible(&head->io_sem))
return -EINTR;