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| author | Dmitry V. Levin <ldv@altlinux.org> | 2014-12-16 06:59:37 +0300 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2014-12-17 08:27:15 -0500 |
| commit | 9d4d65748a5ca26ea8650e50ba521295549bf4e3 (patch) | |
| tree | 6ab682d37fb472d76c8593f72168c5c58b1479a1 /fs/proc_namespace.c | |
| parent | 9ad4dc4f7318080e2e4e0cd23623211a20d33861 (diff) | |
| download | lwn-9d4d65748a5ca26ea8650e50ba521295549bf4e3.tar.gz lwn-9d4d65748a5ca26ea8650e50ba521295549bf4e3.zip | |
vfs: make mounts and mountstats honor root dir like mountinfo does
As we already show mountpoints relative to the root directory, thanks
to the change made back in 2000, change show_vfsmnt() and show_vfsstat()
to skip out-of-root mountpoints the same way as show_mountinfo() does.
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/proc_namespace.c')
| -rw-r--r-- | fs/proc_namespace.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c index 789e8d1e21db..0f96f71ab32b 100644 --- a/fs/proc_namespace.c +++ b/fs/proc_namespace.c @@ -91,6 +91,7 @@ static void show_type(struct seq_file *m, struct super_block *sb) static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt) { + struct proc_mounts *p = proc_mounts(m); struct mount *r = real_mount(mnt); int err = 0; struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt }; @@ -104,7 +105,10 @@ static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt) mangle(m, r->mnt_devname ? r->mnt_devname : "none"); } seq_putc(m, ' '); - seq_path(m, &mnt_path, " \t\n\\"); + /* mountpoints outside of chroot jail will give SEQ_SKIP on this */ + err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\"); + if (err) + goto out; seq_putc(m, ' '); show_type(m, sb); seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw"); @@ -181,6 +185,7 @@ out: static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt) { + struct proc_mounts *p = proc_mounts(m); struct mount *r = real_mount(mnt); struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt }; struct super_block *sb = mnt_path.dentry->d_sb; @@ -200,7 +205,10 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt) /* mount point */ seq_puts(m, " mounted on "); - seq_path(m, &mnt_path, " \t\n\\"); + /* mountpoints outside of chroot jail will give SEQ_SKIP on this */ + err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\"); + if (err) + goto out; seq_putc(m, ' '); /* file system type */ @@ -215,6 +223,7 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt) } seq_putc(m, '\n'); +out: return err; } |