linux-kernel - [PATCH] f2fs: add a proc entry show disk map

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Message-ID: <20240305001709.637722-1-jaegeuk@kernel.org>
Date: Mon,  4 Mar 2024 16:17:08 -0800
From: Jaegeuk Kim <jaegeuk@...nel.org>
To: linux-kernel@...r.kernel.org,
	linux-f2fs-devel@...ts.sourceforge.net
Cc: Jaegeuk Kim <jaegeuk@...nel.org>
Subject: [PATCH] f2fs: add a proc entry show disk map

This patch adds the disk map of block address ranges configured by multiple
partitions.

Signed-off-by: Jaegeuk Kim <jaegeuk@...nel.org>
---
 fs/f2fs/sysfs.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 10f308b3128f..e81af6adb85b 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -1492,6 +1492,27 @@ static int __maybe_unused discard_plist_seq_show(struct seq_file *seq,
 	return 0;
 }
 
+static int __maybe_unused disk_map_seq_show(struct seq_file *seq,
+						void *offset)
+{
+	struct super_block *sb = seq->private;
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
+	int i;
+
+	seq_puts(seq, "Disk Map for multi devices:\n");
+	if (!f2fs_is_multi_device(sbi))
+		return 0;
+
+	for (i = 0; i < sbi->s_ndevs; i++) {
+		seq_printf(seq, "%2d (zoned=%d): %20x - %20x",
+			i, bdev_is_zoned(FDEV(i).bdev),
+			FDEV(i).start_blk, FDEV(i).end_blk);
+		seq_putc(seq, '\n');
+	}
+	return 0;
+}
+
+
 int __init f2fs_init_sysfs(void)
 {
 	int ret;
@@ -1573,6 +1594,8 @@ int f2fs_register_sysfs(struct f2fs_sb_info *sbi)
 				victim_bits_seq_show, sb);
 	proc_create_single_data("discard_plist_info", 0444, sbi->s_proc,
 				discard_plist_seq_show, sb);
+	proc_create_single_data("disk_map", 0444, sbi->s_proc,
+				disk_map_seq_show, sb);
 	return 0;
 put_feature_list_kobj:
 	kobject_put(&sbi->s_feature_list_kobj);
-- 
2.44.0.278.ge034bb2e1d-goog