vfs: show unreachable paths in getcwd and proc
Prepend "(unreachable)" to path strings if the path is not reachable
from the current root.
Two places updated are
- the return string from getcwd()
- and symlinks under /proc/$PID.
Other uses of d_path() are left unchanged (we know that some old
software crashes if /proc/mounts is changed).
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
diff --git a/include/linux/path.h b/include/linux/path.h
index 915e0c3..edc98de 100644
--- a/include/linux/path.h
+++ b/include/linux/path.h
@@ -12,4 +12,9 @@
extern void path_get(struct path *);
extern void path_put(struct path *);
+static inline int path_equal(const struct path *path1, const struct path *path2)
+{
+ return path1->mnt == path2->mnt && path1->dentry == path2->dentry;
+}
+
#endif /* _LINUX_PATH_H */