ceph: add column 'mds' to show caps in more user friendly

In multi-mds, the 'caps' debugfs file will have duplicate ino,
add the 'mds' column to indicate which mds session the cap belongs to.

Signed-off-by: Yanhu Cao <gmayyyha@gmail.com>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 3e3fcda..75b1317 100644 (file)
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -202,7 +202,8 @@ static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
 {
        struct seq_file *s = p;
 
-       seq_printf(s, "0x%-17llx%-17s%-17s\n", ceph_ino(inode),
+       seq_printf(s, "0x%-17llx%-3d%-17s%-17s\n", ceph_ino(inode),
+                  cap->session->s_mds,
                   ceph_cap_string(cap->issued),
                   ceph_cap_string(cap->implemented));
        return 0;
@@ -222,8 +223,8 @@ static int caps_show(struct seq_file *s, void *p)
                   "reserved\t%d\n"
                   "min\t\t%d\n\n",
                   total, avail, used, reserved, min);
-       seq_printf(s, "ino                issued           implemented\n");
-       seq_printf(s, "-----------------------------------------------\n");
+       seq_printf(s, "ino              mds  issued           implemented\n");
+       seq_printf(s, "--------------------------------------------------\n");
 
        mutex_lock(&mdsc->mutex);
        for (i = 0; i < mdsc->max_sessions; i++) {