Currently we don't have a way how to determing from which mount point file has been opened. This information is required for proper dumping and restoring file descriptos due to presence of mount namespaces. It's possible, that two file descriptors are opened using the same paths, but one fd references mount point from one namespace while the other fd -- from other namespace.
Cc: Al Viro <[email protected]> Cc: Oleg Nesterov <[email protected]> Cc: Andrew Morton <[email protected]> Cc: Cyrill Gorcunov <[email protected]> Cc: Pavel Emelyanov <[email protected]> Signed-off-by: Andrey Vagin <[email protected]> --- fs/proc/fd.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/fs/proc/fd.c b/fs/proc/fd.c index 985ea88..0788d09 100644 --- a/fs/proc/fd.c +++ b/fs/proc/fd.c @@ -11,6 +11,7 @@ #include <linux/proc_fs.h> +#include "../mount.h" #include "internal.h" #include "fd.h" @@ -48,8 +49,9 @@ static int seq_show(struct seq_file *m, void *v) } if (!ret) { - seq_printf(m, "pos:\t%lli\nflags:\t0%o\n", - (long long)file->f_pos, f_flags); + seq_printf(m, "pos:\t%lli\nflags:\t0%o\nmnt_id:\t%i\n", + (long long)file->f_pos, f_flags, + real_mount(file->f_path.mnt)->mnt_id); if (file->f_op->show_fdinfo) ret = file->f_op->show_fdinfo(m, file); fput(file); -- 1.8.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
