linux-ext4 - [PATCH] lib/ext2fs: add some msg for io error

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Date:   Thu, 23 Feb 2023 16:48:41 +0800
From:   zhanchengbin <zhanchengbin1@...wei.com>
To:     <tytso@....edu>
CC:     <linux-ext4@...r.kernel.org>, <linfeilong@...wei.com>,
        <louhongxiang@...wei.com>, zhanchengbin <zhanchengbin1@...wei.com>
Subject: [PATCH] lib/ext2fs: add some msg for io error

Add msgs to show whether there is eio in fsck process, when write and
fsync methods fail.

Signed-off-by: zhanchengbin <zhanchengbin1@...wei.com>
---
 lib/ext2fs/unix_io.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/lib/ext2fs/unix_io.c b/lib/ext2fs/unix_io.c
index 3171c736..d0ab3689 100644
--- a/lib/ext2fs/unix_io.c
+++ b/lib/ext2fs/unix_io.c
@@ -1265,12 +1265,17 @@ static errcode_t unix_write_byte(io_channel channel, unsigned long offset,
 		return errno;
 
 	actual = write(data->dev, buf, size);
+
 	if (actual < 0)
-		return errno;
+		retval = errno;
 	if (actual != size)
-		return EXT2_ET_SHORT_WRITE;
+		retval = EXT2_ET_SHORT_WRITE;
 
 	return 0;
+
+	fprintf(stderr, "%s unix_write_byte error, error %d\n",
+			channel->name, errno);
+	return retval;
 }
 
 /*
@@ -1289,8 +1294,11 @@ static errcode_t unix_flush(io_channel channel)
 	retval = flush_cached_blocks(channel, data, 0);
 #endif
 #ifdef HAVE_FSYNC
-	if (!retval && fsync(data->dev) != 0)
+	if (!retval && fsync(data->dev) != 0) {
+		fprintf(stderr, "%s flush error, error %d\n",
+				channel->name, errno);
 		return errno;
+	}
 #endif
 	return retval;
 }
-- 
2.31.1