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authorTejun Heo <tj@kernel.org>2014-02-03 23:09:10 +0400
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-08 03:52:48 +0400
commit6a7fed4eefddad48224f1c9d534b4e262f0897f6 (patch)
tree28c347ffd4cbb92146fde47768c396c088c44a95 /fs/kernfs/mount.c
parent90c07c895c87d38db100b6afcb686ab3ef0d6a64 (diff)
downloadlinux-6a7fed4eefddad48224f1c9d534b4e262f0897f6.tar.xz
kernfs: implement kernfs_syscall_ops->remount_fs() and ->show_options()
Add two super_block related syscall callbacks ->remount_fs() and ->show_options() to kernfs_syscall_ops. These simply forward the matching super_operations. Signed-off-by: Tejun Heo <tj@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/kernfs/mount.c')
-rw-r--r--fs/kernfs/mount.c23
1 files changed, 23 insertions, 0 deletions
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index 0d6ce895a9ee..70cc6983d9b5 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -19,10 +19,33 @@
struct kmem_cache *kernfs_node_cache;
+static int kernfs_sop_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ struct kernfs_root *root = kernfs_info(sb)->root;
+ struct kernfs_syscall_ops *scops = root->syscall_ops;
+
+ if (scops && scops->remount_fs)
+ return scops->remount_fs(root, flags, data);
+ return 0;
+}
+
+static int kernfs_sop_show_options(struct seq_file *sf, struct dentry *dentry)
+{
+ struct kernfs_root *root = kernfs_root(dentry->d_fsdata);
+ struct kernfs_syscall_ops *scops = root->syscall_ops;
+
+ if (scops && scops->show_options)
+ return scops->show_options(sf, root);
+ return 0;
+}
+
static const struct super_operations kernfs_sops = {
.statfs = simple_statfs,
.drop_inode = generic_delete_inode,
.evict_inode = kernfs_evict_inode,
+
+ .remount_fs = kernfs_sop_remount_fs,
+ .show_options = kernfs_sop_show_options,
};
static int kernfs_fill_super(struct super_block *sb)