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| author |   Miklos Szeredi <mszeredi@redhat.com> | 2023-10-25 16:02:01 +0200 |
|---|---|---|
| committer |   Christian Brauner <brauner@kernel.org> | 2023-11-18 14:56:16 +0100 |
| commit | 56c94c626785001dbb683312725b7d87c6ec6a91 (patch) | |
| tree | faefe8f7ce06290bf63a5a72928062601a34b439 /fs | |
| parent | mounts: keep list of mounts in an rbtree (diff) | |
| download | wireguard-linux-56c94c626785001dbb683312725b7d87c6ec6a91.tar.xz wireguard-linux-56c94c626785001dbb683312725b7d87c6ec6a91.zip | |
namespace: extract show_path() helper
To be used by the statmount(2) syscall as well.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Link: https://lore.kernel.org/r/20231025140205.3586473-4-mszeredi@redhat.com
Reviewed-by: Ian Kent <raven@themaw.net>
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/internal.h | 2 | ||||
| -rw-r--r-- | fs/namespace.c | 9 | ||||
| -rw-r--r-- | fs/proc_namespace.c | 10 |
3 files changed, 14 insertions, 7 deletions
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 */ |