linux-kernel - [PATCH] ceph: add column 'mds' to show caps in more user friendly

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Message-Id: <20200824030058.37786-1-gmayyyha@gmail.com>
Date:   Mon, 24 Aug 2020 11:00:58 +0800
From:   Yanhu Cao <gmayyyha@...il.com>
To:     jlayton@...nel.org
Cc:     idryomov@...il.com, ceph-devel@...r.kernel.org,
        linux-kernel@...r.kernel.org, Yanhu Cao <gmayyyha@...il.com>
Subject: [PATCH] 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@...il.com>
---
 fs/ceph/debugfs.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index 97539b497e4c..47f8971a9c52 100644
--- 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%-17lx%-17s%-17s\n", inode->i_ino,
+	seq_printf(s, "0x%-17lx%-3d%-17s%-17s\n", inode->i_ino,
+		   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++) {
-- 
2.24.3 (Apple Git-128)