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| author | Bryan Schumaker <bjschuma@netapp.com> | 2012-02-24 14:14:50 -0500 |
|---|---|---|
| committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2012-03-01 16:50:31 -0500 |
| commit | 59e6b9c11341e3b8ac5925427c903d4eae435bd8 (patch) | |
| tree | 68b39f847badedfca1476fbbf7ef6049a444f493 /security/keys/key.c | |
| parent | 0cb3284b535bd5eacc287632b55150c8e5d9edc7 (diff) | |
| download | lwn-59e6b9c11341e3b8ac5925427c903d4eae435bd8.tar.gz lwn-59e6b9c11341e3b8ac5925427c903d4eae435bd8.zip | |
Created a function for setting timeouts on keys
The keyctl_set_timeout function isn't exported to other parts of the
kernel, but I want to use it for the NFS idmapper. I already have the
key, but I wanted a generic way to set the timeout.
Signed-off-by: Bryan Schumaker <bjschuma@netapp.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Diffstat (limited to 'security/keys/key.c')
| -rw-r--r-- | security/keys/key.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/security/keys/key.c b/security/keys/key.c index 7ada8019be1f..06783cffb3af 100644 --- a/security/keys/key.c +++ b/security/keys/key.c @@ -671,6 +671,26 @@ found_kernel_type: return ktype; } +void key_set_timeout(struct key *key, unsigned timeout) +{ + struct timespec now; + time_t expiry = 0; + + /* make the changes with the locks held to prevent races */ + down_write(&key->sem); + + if (timeout > 0) { + now = current_kernel_time(); + expiry = now.tv_sec + timeout; + } + + key->expiry = expiry; + key_schedule_gc(key->expiry + key_gc_delay); + + up_write(&key->sem); +} +EXPORT_SYMBOL_GPL(key_set_timeout); + /* * Unlock a key type locked by key_type_lookup(). */ |