[Xen-devel] [PATCH v4 39/53] xen/xsm/flask/flask_op.c: let custom parameter parsing routines return errno

[Juergen Gross <jgross@xxxxxxxx>]

Modify the custom parameter parsing routines in:

xen/xsm/flask/flask_op.c

to indicate whether the parameter value was parsed successfully.

Cc: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
Signed-off-by: Juergen Gross <jgross@xxxxxxxx>
Acked-by: Daniel De Graaf <dgdegra@xxxxxxxxxxxxx>
Acked-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/xsm/flask/flask_op.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/xen/xsm/flask/flask_op.c b/xen/xsm/flask/flask_op.c
index 15aa96b09f..03baa28b68 100644
--- a/xen/xsm/flask/flask_op.c
+++ b/xen/xsm/flask/flask_op.c
@@ -26,7 +26,7 @@
 #define _copy_from_guest copy_from_guest
 
 enum flask_bootparam_t __read_mostly flask_bootparam = 
FLASK_BOOTPARAM_ENFORCING;
-static void parse_flask_param(char *s);
+static int parse_flask_param(const char *s);
 custom_param("flask", parse_flask_param);
 
 bool __read_mostly flask_enforcing = true;
@@ -58,7 +58,7 @@ static int flask_security_make_bools(void);
 
 extern int ss_initialized;
 
-static void __init parse_flask_param(char *s)
+static int __init parse_flask_param(const char *s)
 {
     if ( !strcmp(s, "enforcing") )
         flask_bootparam = FLASK_BOOTPARAM_ENFORCING;
@@ -70,6 +70,8 @@ static void __init parse_flask_param(char *s)
         flask_bootparam = FLASK_BOOTPARAM_PERMISSIVE;
     else
         flask_bootparam = FLASK_BOOTPARAM_INVALID;
+
+    return (flask_bootparam == FLASK_BOOTPARAM_INVALID) ? -EINVAL : 0;
 }
 
 static int domain_has_security(struct domain *d, u32 perms)
-- 
2.12.3


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