diff options
| author | Eric W. Biederman <ebiederm@xmission.com> | 2015-05-24 12:49:04 -0500 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2015-07-11 11:09:00 -0500 |
| commit | 75509fd88fbd580c793780b0001c71c3510f2726 (patch) | |
| tree | bb9f7f285f5db2a50cc7cfc1d87a369c9f7e4314 | |
| parent | 77b1a97d218277d55a15016826d1fd79290f1df2 (diff) | |
nsfs: Add a show_path method to fix mountinfo
Today mountinfo displays a very unhelpful "/" for nsfs files. Add a
show_path method returning the same string as ns_dname. This results
in a bind mount of /proc/<pid>/ns/net showing up in /proc/<pid>/mountinfo as
"net:[1234...]" instead of "/".
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
| -rw-r--r-- | fs/nsfs.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/fs/nsfs.c b/fs/nsfs.c index 99521e7c492b..e4905fbf3396 100644 --- a/fs/nsfs.c +++ b/fs/nsfs.c @@ -4,6 +4,7 @@ #include <linux/proc_ns.h> #include <linux/magic.h> #include <linux/ktime.h> +#include <linux/seq_file.h> static struct vfsmount *nsfs_mnt; @@ -136,9 +137,18 @@ out_invalid: return ERR_PTR(-EINVAL); } +static int nsfs_show_path(struct seq_file *seq, struct dentry *dentry) +{ + struct inode *inode = d_inode(dentry); + const struct proc_ns_operations *ns_ops = dentry->d_fsdata; + + return seq_printf(seq, "%s:[%lu]", ns_ops->name, inode->i_ino); +} + static const struct super_operations nsfs_ops = { .statfs = simple_statfs, .evict_inode = nsfs_evict, + .show_path = nsfs_show_path, }; static struct dentry *nsfs_mount(struct file_system_type *fs_type, int flags, const char *dev_name, void *data) |