Change the kernel's ucred API as follows:

- crhold() returns a reference to the ucred whose refcount it bumps.
- crcopy() now simply copies the credentials from one credential to
  another and has no return value.
- a new crshared() primitive is added which returns true if a ucred's
  refcount is > 1 and false (0) otherwise.

2 files changed, 2 insertions, 4 deletions

diff --git a/sys/ufs/ufs/ufs_extattr.c b/sys/ufs/ufs/ufs_extattr.c
index 60dc574..a1d523f 100644
--- a/sys/ufs/ufs/ufs_extattr.c
+++ b/sys/ufs/ufs/ufs_extattr.c
@@ -210,8 +210,7 @@ ufs_extattr_start(struct mount *mp, struct thread *td)
 
 	ump->um_extattr.uepm_flags |= UFS_EXTATTR_UEPM_STARTED;
 
-	crhold(td->td_proc->p_ucred);
-	ump->um_extattr.uepm_ucred = td->td_proc->p_ucred;
+	ump->um_extattr.uepm_ucred = crhold(td->td_proc->p_ucred);
 
 unlock:
 	ufs_extattr_uepm_unlock(ump, td);
diff --git a/sys/ufs/ufs/ufs_quota.c b/sys/ufs/ufs/ufs_quota.c
index 4c10d88..f1a5835 100644
--- a/sys/ufs/ufs/ufs_quota.c
+++ b/sys/ufs/ufs/ufs_quota.c
@@ -422,8 +422,7 @@ quotaon(td, mp, type, fname)
 	 * Save the credential of the process that turned on quotas.
 	 * Set up the time limits for this quota.
 	 */
-	crhold(td->td_proc->p_ucred);
-	ump->um_cred[type] = td->td_proc->p_ucred;
+	ump->um_cred[type] = crhold(td->td_proc->p_ucred);
 	ump->um_btime[type] = MAX_DQ_TIME;
 	ump->um_itime[type] = MAX_IQ_TIME;
 	if (dqget(NULLVP, 0, ump, type, &dq) == 0) {