xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

userns: make has_capability* into real functions

Browse Source 
So we can let type safety keep things sane, and as a bonus we can remove
the declaration of init_user_ns in capability.h.

Signed-off-by: Serge E. Hallyn <serge.hallyn@canonical.com>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>
Cc: Daniel Lezcano <daniel.lezcano@free.fr>
Cc: David Howells <dhowells@redhat.com>
Cc: James Morris <jmorris@namei.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Serge E. Hallyn
2011-03-23 16:43:21 -07:00
committed by Linus Torvalds
parent 8409cca705
commit 3263245de4
2 changed files with 58 additions and 30 deletions
Download Patch File Download Diff File Expand all files Collapse all files

54
kernel/capability.c
View File

@@ -290,6 +290,60 @@ error:
return ret;
}
/**
* has_capability - Does a task have a capability in init_user_ns
* @t: The task in question
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
* currently in effect to the initial user namespace, false if not.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
bool has_capability(struct task_struct *t, int cap)
{
int ret = security_real_capable(t, &init_user_ns, cap);
return (ret == 0);
}
/**
* has_capability - Does a task have a capability in a specific user ns
* @t: The task in question
* @ns: target user namespace
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
* currently in effect to the specified user namespace, false if not.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
bool has_ns_capability(struct task_struct *t,
struct user_namespace *ns, int cap)
{
int ret = security_real_capable(t, ns, cap);
return (ret == 0);
}
/**
* has_capability_noaudit - Does a task have a capability (unaudited)
* @t: The task in question
* @cap: The capability to be tested for
*
* Return true if the specified task has the given superior capability
* currently in effect to init_user_ns, false if not. Don't write an
* audit message for the check.
*
* Note that this does not set PF_SUPERPRIV on the task.
*/
bool has_capability_noaudit(struct task_struct *t, int cap)
{
int ret = security_real_capable_noaudit(t, &init_user_ns, cap);
return (ret == 0);
}
/**
* capable - Determine if the current task has a superior capability in effect
* @cap: The capability to be tested for