fs/kernfs/dir: obey S_ISGID

[platform/kernel/linux-rpi.git] / fs / kernfs / dir.c

diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 8b2bd65..62d39ec 100644 (file)
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -676,6 +676,18 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
 {
        struct kernfs_node *kn;
 
+       if (parent->mode & S_ISGID) {
+               /* this code block imitates inode_init_owner() for
+                * kernfs
+                */
+
+               if (parent->iattr)
+                       gid = parent->iattr->ia_gid;
+
+               if (flags & KERNFS_DIR)
+                       mode |= S_ISGID;
+       }
+
        kn = __kernfs_new_node(kernfs_root(parent), parent,
                               name, mode, uid, gid, flags);
        if (kn) {