From 56c94c626785001dbb683312725b7d87c6ec6a91 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Wed, 25 Oct 2023 16:02:01 +0200 Subject: namespace: extract show_path() helper To be used by the statmount(2) syscall as well. Signed-off-by: Miklos Szeredi Link: https://lore.kernel.org/r/20231025140205.3586473-4-mszeredi@redhat.com Reviewed-by: Ian Kent Signed-off-by: Christian Brauner --- fs/internal.h | 2 ++ fs/namespace.c | 9 +++++++++ fs/proc_namespace.c | 10 +++------- 3 files changed, 14 insertions(+), 7 deletions(-) (limited to 'fs') diff --git a/fs/internal.h b/fs/internal.h index 58e43341aebf..16bfe50747c6 100644 --- a/fs/internal.h +++ b/fs/internal.h @@ -83,6 +83,8 @@ int path_mount(const char *dev_name, struct path *path, const char *type_page, unsigned long flags, void *data_page); int path_umount(struct path *path, int flags); +int show_path(struct seq_file *m, struct dentry *root); + /* * fs_struct.c */ diff --git a/fs/namespace.c b/fs/namespace.c index bbe94096e262..d3665d025acb 100644 --- a/fs/namespace.c +++ b/fs/namespace.c @@ -4674,6 +4674,15 @@ SYSCALL_DEFINE5(mount_setattr, int, dfd, const char __user *, path, return err; } +int show_path(struct seq_file *m, struct dentry *root) +{ + if (root->d_sb->s_op->show_path) + return root->d_sb->s_op->show_path(m, root); + + seq_dentry(m, root, " \t\n\\"); + return 0; +} + static void __init init_mount_tree(void) { struct vfsmount *mnt; diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c index 73d2274d5f59..0a808951b7d3 100644 --- a/fs/proc_namespace.c +++ b/fs/proc_namespace.c @@ -142,13 +142,9 @@ static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt) seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id, MAJOR(sb->s_dev), MINOR(sb->s_dev)); - if (sb->s_op->show_path) { - err = sb->s_op->show_path(m, mnt->mnt_root); - if (err) - goto out; - } else { - seq_dentry(m, mnt->mnt_root, " \t\n\\"); - } + err = show_path(m, mnt->mnt_root); + if (err) + goto out; seq_putc(m, ' '); /* mountpoints outside of chroot jail will give SEQ_SKIP on this */ -- cgit v1.2.3