ima: use generic_file_llseek for securityfs

The default for llseek will change to no_llseek,
so securityfs users need to add explicit .llseek
assignments. Since we're dealing with regular
files from a VFS perspective, use generic_file_llseek.
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Mimi Zohar <zohar@us.ibm.com>
Signed-off-by: NJames Morris <jmorris@namei.org>

security/integrity/ima/ima_fs.c

@@ -45,7 +45,8 @@ static ssize_t ima_show_htable_violations(struct file *filp,
 }
 
 static const struct file_operations ima_htable_violations_ops = {
-	.read = ima_show_htable_violations
+	.read = ima_show_htable_violations,
+	.llseek = generic_file_llseek,
 };
 
 static ssize_t ima_show_measurements_count(struct file *filp,
@@ -57,7 +58,8 @@ static ssize_t ima_show_measurements_count(struct file *filp,
 }
 
 static const struct file_operations ima_measurements_count_ops = {
-	.read = ima_show_measurements_count
+	.read = ima_show_measurements_count,
+	.llseek = generic_file_llseek,
 };
 
 /* returns pointer to hlist_node */
@@ -319,7 +321,8 @@ static int ima_release_policy(struct inode *inode, struct file *file)
 static const struct file_operations ima_measure_policy_ops = {
 	.open = ima_open_policy,
 	.write = ima_write_policy,
-	.release = ima_release_policy
+	.release = ima_release_policy,
+	.llseek = generic_file_llseek,
 };
 
 int __init ima_fs_init(void)