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-rw-r--r--fs/kernfs/dir.c44
1 files changed, 43 insertions, 1 deletions
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 42c5b9f23b41..510b5062ef30 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -583,12 +583,13 @@ EXPORT_SYMBOL_GPL(kernfs_find_and_get_ns);
/**
* kernfs_create_root - create a new kernfs hierarchy
+ * @kdops: optional directory syscall operations for the hierarchy
* @priv: opaque data associated with the new directory
*
* Returns the root of the new hierarchy on success, ERR_PTR() value on
* failure.
*/
-struct kernfs_root *kernfs_create_root(void *priv)
+struct kernfs_root *kernfs_create_root(struct kernfs_dir_ops *kdops, void *priv)
{
struct kernfs_root *root;
struct kernfs_node *kn;
@@ -610,6 +611,7 @@ struct kernfs_root *kernfs_create_root(void *priv)
kn->priv = priv;
kn->dir.root = root;
+ root->dir_ops = kdops;
root->kn = kn;
return root;
@@ -706,6 +708,42 @@ static struct dentry *kernfs_iop_lookup(struct inode *dir,
return ret;
}
+static int kernfs_iop_mkdir(struct inode *dir, struct dentry *dentry,
+ umode_t mode)
+{
+ struct kernfs_node *parent = dir->i_private;
+ struct kernfs_dir_ops *kdops = kernfs_root(parent)->dir_ops;
+
+ if (!kdops || !kdops->mkdir)
+ return -EPERM;
+
+ return kdops->mkdir(parent, dentry->d_name.name, mode);
+}
+
+static int kernfs_iop_rmdir(struct inode *dir, struct dentry *dentry)
+{
+ struct kernfs_node *kn = dentry->d_fsdata;
+ struct kernfs_dir_ops *kdops = kernfs_root(kn)->dir_ops;
+
+ if (!kdops || !kdops->rmdir)
+ return -EPERM;
+
+ return kdops->rmdir(kn);
+}
+
+static int kernfs_iop_rename(struct inode *old_dir, struct dentry *old_dentry,
+ struct inode *new_dir, struct dentry *new_dentry)
+{
+ struct kernfs_node *kn = old_dentry->d_fsdata;
+ struct kernfs_node *new_parent = new_dir->i_private;
+ struct kernfs_dir_ops *kdops = kernfs_root(kn)->dir_ops;
+
+ if (!kdops || !kdops->rename)
+ return -EPERM;
+
+ return kdops->rename(kn, new_parent, new_dentry->d_name.name);
+}
+
const struct inode_operations kernfs_dir_iops = {
.lookup = kernfs_iop_lookup,
.permission = kernfs_iop_permission,
@@ -715,6 +753,10 @@ const struct inode_operations kernfs_dir_iops = {
.removexattr = kernfs_iop_removexattr,
.getxattr = kernfs_iop_getxattr,
.listxattr = kernfs_iop_listxattr,
+
+ .mkdir = kernfs_iop_mkdir,
+ .rmdir = kernfs_iop_rmdir,
+ .rename = kernfs_iop_rename,
};
static struct kernfs_node *kernfs_leftmost_descendant(struct kernfs_node *pos)