[PATCH 2/5] fsnotify: pass flags argument to fsnotify_add_mark()

[Amir Goldstein <amir73il@xxxxxxxxx>]

Instead of passing the allow_dups argument to fsnotify_add_mark()
as a 'boolean' int, pass a generic flags argument and define the flag
FSNOTIFY_ADD_MARK_ALLOW_DUPS to express the old allow_dups meaning.

We are going to use the flags argument to pass more options to
to fsnotify_add_mark().

Signed-off-by: Amir Goldstein <amir73il@xxxxxxxxx>
---
 fs/notify/mark.c                 | 13 ++++++-------
 include/linux/fsnotify_backend.h | 18 +++++++++---------
 kernel/audit_fsnotify.c          |  3 ++-
 3 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index 4853184f7dde..190df435919f 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -574,7 +574,7 @@ static struct fsnotify_mark_connector *fsnotify_grab_connector(
 static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
 				  fsnotify_connp_t *connp,
 				  unsigned int obj_type,
-				  int allow_dups, __kernel_fsid_t *fsid)
+				  int flags, __kernel_fsid_t *fsid)
 {
 	struct fsnotify_mark *lmark, *last = NULL;
 	struct fsnotify_mark_connector *conn;
@@ -633,7 +633,7 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
 
 		if ((lmark->group == mark->group) &&
 		    (lmark->flags & FSNOTIFY_MARK_FLAG_ATTACHED) &&
-		    !allow_dups) {
+		    !(flags & FSNOTIFY_ADD_MARK_ALLOW_DUPS)) {
 			err = -EEXIST;
 			goto out_err;
 		}
@@ -668,7 +668,7 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
  */
 int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 			     fsnotify_connp_t *connp, unsigned int obj_type,
-			     int allow_dups, __kernel_fsid_t *fsid)
+			     int flags, __kernel_fsid_t *fsid)
 {
 	struct fsnotify_group *group = mark->group;
 	int ret = 0;
@@ -688,7 +688,7 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 	fsnotify_get_mark(mark); /* for g_list */
 	spin_unlock(&mark->lock);
 
-	ret = fsnotify_add_mark_list(mark, connp, obj_type, allow_dups, fsid);
+	ret = fsnotify_add_mark_list(mark, connp, obj_type, flags, fsid);
 	if (ret)
 		goto err;
 
@@ -708,14 +708,13 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 }
 
 int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
-		      unsigned int obj_type, int allow_dups,
-		      __kernel_fsid_t *fsid)
+		      unsigned int obj_type, int flags, __kernel_fsid_t *fsid)
 {
 	int ret;
 	struct fsnotify_group *group = mark->group;
 
 	mutex_lock(&group->mark_mutex);
-	ret = fsnotify_add_mark_locked(mark, connp, obj_type, allow_dups, fsid);
+	ret = fsnotify_add_mark_locked(mark, connp, obj_type, flags, fsid);
 	mutex_unlock(&group->mark_mutex);
 	return ret;
 }
diff --git a/include/linux/fsnotify_backend.h b/include/linux/fsnotify_backend.h
index 0bd63608e935..0b548518b166 100644
--- a/include/linux/fsnotify_backend.h
+++ b/include/linux/fsnotify_backend.h
@@ -633,30 +633,30 @@ extern struct fsnotify_mark *fsnotify_find_mark(fsnotify_connp_t *connp,
 /* Get cached fsid of filesystem containing object */
 extern int fsnotify_get_conn_fsid(const struct fsnotify_mark_connector *conn,
 				  __kernel_fsid_t *fsid);
+
 /* attach the mark to the object */
+#define FSNOTIFY_ADD_MARK_ALLOW_DUPS	0x1
+
 extern int fsnotify_add_mark(struct fsnotify_mark *mark,
 			     fsnotify_connp_t *connp, unsigned int obj_type,
-			     int allow_dups, __kernel_fsid_t *fsid);
+			     int flags, __kernel_fsid_t *fsid);
 extern int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 				    fsnotify_connp_t *connp,
-				    unsigned int obj_type, int allow_dups,
+				    unsigned int obj_type, int flags,
 				    __kernel_fsid_t *fsid);
 
 /* attach the mark to the inode */
 static inline int fsnotify_add_inode_mark(struct fsnotify_mark *mark,
-					  struct inode *inode,
-					  int allow_dups)
+					  struct inode *inode, int flags)
 {
 	return fsnotify_add_mark(mark, &inode->i_fsnotify_marks,
-				 FSNOTIFY_OBJ_TYPE_INODE, allow_dups, NULL);
+				 FSNOTIFY_OBJ_TYPE_INODE, flags, NULL);
 }
 static inline int fsnotify_add_inode_mark_locked(struct fsnotify_mark *mark,
-						 struct inode *inode,
-						 int allow_dups)
+						 struct inode *inode, int flags)
 {
 	return fsnotify_add_mark_locked(mark, &inode->i_fsnotify_marks,
-					FSNOTIFY_OBJ_TYPE_INODE, allow_dups,
-					NULL);
+					FSNOTIFY_OBJ_TYPE_INODE, flags, NULL);
 }
 
 /* given a group and a mark, flag mark to be freed when all references are dropped */
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c
index 02348b48447c..82233f651c62 100644
--- a/kernel/audit_fsnotify.c
+++ b/kernel/audit_fsnotify.c
@@ -100,7 +100,8 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa
 	audit_update_mark(audit_mark, dentry->d_inode);
 	audit_mark->rule = krule;
 
-	ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, true);
+	ret = fsnotify_add_inode_mark(&audit_mark->mark, inode,
+				      FSNOTIFY_ADD_MARK_ALLOW_DUPS);
 	if (ret < 0) {
 		fsnotify_put_mark(&audit_mark->mark);
 		audit_mark = ERR_PTR(ret);
-- 
2.25.1