[RESEND,1/2] audit: introduce a struct to represent an audit timestamp

Commit Message

Ondrej Mosnacek Dec. 19, 2022, 6 p.m. UTC

Join the two fields that comprise an audit timestamp into a common
structure. This will be used further in later commits.

Signed-off-by: Ondrej Mosnacek <[e-mail]>
---
 include/linux/audit.h |  5 +++++
 kernel/audit.c        | 16 ++++++++--------
 kernel/audit.h        |  4 ++--
 kernel/auditsc.c      |  9 ++++-----
 4 files changed, 19 insertions(+), 15 deletions(-)

Patch

diff --git a/include/linux/audit.h b/include/linux/audit.h
index 3608992848d3..788ab93c3be4 100644
--- a/include/linux/audit.h
+++ b/include/linux/audit.h
@@ -84,6 +84,11 @@  enum audit_ntp_type {
 	AUDIT_NTP_NVALS /* count */
 };
 
+struct audit_timestamp {
+	struct timespec64 t;
+	unsigned int serial;
+};
+
 #ifdef CONFIG_AUDITSYSCALL
 struct audit_ntp_val {
 	long long oldval, newval;
diff --git a/kernel/audit.c b/kernel/audit.c
index 9bc0b0301198..aded2d69ea69 100644
--- a/kernel/audit.c
+++ b/kernel/audit.c
@@ -1818,11 +1818,11 @@  unsigned int audit_serial(void)
 }
 
 static inline void audit_get_stamp(struct audit_context *ctx,
-				   struct timespec64 *t, unsigned int *serial)
+				   struct audit_timestamp *ts)
 {
-	if (!ctx || !auditsc_get_stamp(ctx, t, serial)) {
-		ktime_get_coarse_real_ts64(t);
-		*serial = audit_serial();
+	if (!ctx || !auditsc_get_stamp(ctx, ts)) {
+		ktime_get_coarse_real_ts64(&ts->t);
+		ts->serial = audit_serial();
 	}
 }
 
@@ -1845,8 +1845,7 @@  struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 				     int type)
 {
 	struct audit_buffer *ab;
-	struct timespec64 t;
-	unsigned int serial;
+	struct audit_timestamp ts;
 
 	if (audit_initialized != AUDIT_INITIALIZED)
 		return NULL;
@@ -1901,12 +1900,13 @@  struct audit_buffer *audit_log_start(struct audit_context *ctx, gfp_t gfp_mask,
 		return NULL;
 	}
 
-	audit_get_stamp(ab->ctx, &t, &serial);
+	audit_get_stamp(ab->ctx, &ts);
 	/* cancel dummy context to enable supporting records */
 	if (ctx)
 		ctx->dummy = 0;
 	audit_log_format(ab, "audit(%llu.%03lu:%u): ",
-			 (unsigned long long)t.tv_sec, t.tv_nsec/1000000, serial);
+			 (unsigned long long)ts.t.tv_sec, ts.t.tv_nsec/1000000,
+			 ts.serial);
 
 	return ab;
 }
diff --git a/kernel/audit.h b/kernel/audit.h
index c57b008b9914..e3ea00ea399a 100644
--- a/kernel/audit.h
+++ b/kernel/audit.h
@@ -262,7 +262,7 @@  extern void audit_put_tty(struct tty_struct *tty);
 #ifdef CONFIG_AUDITSYSCALL
 extern unsigned int audit_serial(void);
 extern int auditsc_get_stamp(struct audit_context *ctx,
-			      struct timespec64 *t, unsigned int *serial);
+			     struct audit_timestamp *ts);
 
 extern void audit_put_watch(struct audit_watch *watch);
 extern void audit_get_watch(struct audit_watch *watch);
@@ -303,7 +303,7 @@  extern void audit_filter_inodes(struct task_struct *tsk,
 				struct audit_context *ctx);
 extern struct list_head *audit_killed_trees(void);
 #else /* CONFIG_AUDITSYSCALL */
-#define auditsc_get_stamp(c, t, s) 0
+#define auditsc_get_stamp(c, ts) 0
 #define audit_put_watch(w) do { } while (0)
 #define audit_get_watch(w) do { } while (0)
 #define audit_to_watch(k, p, l, o) (-EINVAL)
diff --git a/kernel/auditsc.c b/kernel/auditsc.c
index 9f8c05228d6d..061009ba9959 100644
--- a/kernel/auditsc.c
+++ b/kernel/auditsc.c
@@ -2513,16 +2513,15 @@  EXPORT_SYMBOL_GPL(__audit_inode_child);
  *
  * Also sets the context as auditable.
  */
-int auditsc_get_stamp(struct audit_context *ctx,
-		       struct timespec64 *t, unsigned int *serial)
+int auditsc_get_stamp(struct audit_context *ctx, struct audit_timestamp *ts)
 {
 	if (ctx->context == AUDIT_CTX_UNUSED)
 		return 0;
 	if (!ctx->serial)
 		ctx->serial = audit_serial();
-	t->tv_sec  = ctx->ctime.tv_sec;
-	t->tv_nsec = ctx->ctime.tv_nsec;
-	*serial    = ctx->serial;
+	ts->t.tv_sec  = ctx->ctime.tv_sec;
+	ts->t.tv_nsec = ctx->ctime.tv_nsec;
+	ts->serial    = ctx->serial;
 	if (!ctx->prio) {
 		ctx->prio = 1;
 		ctx->current_state = AUDIT_STATE_RECORD;