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| author | Ingo Molnar <mingo@elte.hu> | 2008-07-07 08:01:26 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-07-07 08:01:26 +0200 |
| commit | 032f82786f9be4635acaa5f77feca175a4ac5fe1 (patch) | |
| tree | 11ce43c1086d3dec43c92b0a2cc740240b338fb7 /kernel/capability.c | |
| parent | sched: fix accounting in task delay accounting & migration (diff) | |
| parent | Linux 2.6.26-rc9 (diff) | |
| download | linux-032f82786f9be4635acaa5f77feca175a4ac5fe1.tar.gz linux-032f82786f9be4635acaa5f77feca175a4ac5fe1.zip | |
Merge commit 'v2.6.26-rc9' into sched/devel
Diffstat (limited to 'kernel/capability.c')
| -rw-r--r-- | kernel/capability.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/kernel/capability.c b/kernel/capability.c index cfbe44299488..901e0fdc3fff 100644 --- a/kernel/capability.c +++ b/kernel/capability.c @@ -121,6 +121,27 @@ static int cap_validate_magic(cap_user_header_t header, unsigned *tocopy) * uninteresting and/or not to be changed. */ +/* + * Atomically modify the effective capabilities returning the original + * value. No permission check is performed here - it is assumed that the + * caller is permitted to set the desired effective capabilities. + */ +kernel_cap_t cap_set_effective(const kernel_cap_t pE_new) +{ + kernel_cap_t pE_old; + + spin_lock(&task_capability_lock); + + pE_old = current->cap_effective; + current->cap_effective = pE_new; + + spin_unlock(&task_capability_lock); + + return pE_old; +} + +EXPORT_SYMBOL(cap_set_effective); + /** * sys_capget - get the capabilities of a given process. * @header: pointer to struct that contains capability version and |