diff options
Diffstat (limited to 'kernel/user.c')
| -rw-r--r-- | kernel/user.c | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/user.c b/kernel/user.c index 0704b2aad9c5..592680d8cc68 100644 --- a/kernel/user.c +++ b/kernel/user.c @@ -116,6 +116,23 @@ struct user_struct * alloc_uid(uid_t uid) return up; } +void switch_uid(struct user_struct *new_user) +{ + struct user_struct *old_user; + + /* What if a process setreuid()'s and this brings the + * new uid over his NPROC rlimit? We can check this now + * cheaply with the new uid cache, so if it matters + * we should be checking for it. -DaveM + */ + old_user = current->user; + atomic_inc(&new_user->__count); + atomic_inc(&new_user->processes); + atomic_dec(&old_user->processes); + current->user = new_user; + free_uid(old_user); +} + static int __init uid_cache_init(void) { |