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From: Jeff Layton <jlayton@kernel.org>
To: viro@ZenIV.linux.org.uk, dhowells@redhat.com
Cc: willy@infradead.org, andres@anarazel.de, cmaiolino@redhat.com,
	linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org
Subject: [PATCH 1/5] vfs: track per-sb writeback errors
Date: Mon,  4 Jun 2018 14:03:00 -0400	[thread overview]
Message-ID: <20180604180304.9662-2-jlayton@kernel.org> (raw)
In-Reply-To: <20180604180304.9662-1-jlayton@kernel.org>

From: Jeff Layton <jlayton@redhat.com>

Keep a per-sb errseq_t that tracks whether there have been any writeback
errors on this superblock. When an error is recorded for an inode via
mapping_set_error, record it in s_wb_err as well.

Cc: Andres Freund <andres@anarazel.de>
Cc: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
---
 include/linux/fs.h      | 3 +++
 include/linux/pagemap.h | 5 ++++-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/include/linux/fs.h b/include/linux/fs.h
index 79f98ed39a18..ccdcde9e185b 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1429,6 +1429,9 @@ struct super_block {
 	/* Being remounted read-only */
 	int s_readonly_remount;
 
+	/* per-sb errseq_t for reporting writeback errors via syncfs */
+	errseq_t s_wb_err;
+
 	/* AIO completions deferred from interrupt context */
 	struct workqueue_struct *s_dio_done_wq;
 	struct hlist_head s_pins;
diff --git a/include/linux/pagemap.h b/include/linux/pagemap.h
index b1bd2186e6d2..2de87c5a2718 100644
--- a/include/linux/pagemap.h
+++ b/include/linux/pagemap.h
@@ -51,7 +51,10 @@ static inline void mapping_set_error(struct address_space *mapping, int error)
 		return;
 
 	/* Record in wb_err for checkers using errseq_t based tracking */
-	filemap_set_wb_err(mapping, error);
+	__filemap_set_wb_err(mapping, error);
+
+	/* Record it in superblock */
+	errseq_set(&mapping->host->i_sb->s_wb_err, error);
 
 	/* Record it in flags for now, for legacy callers */
 	if (error == -ENOSPC)
-- 
2.17.0

  reply	other threads:[~2018-06-04 18:03 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-06-04 18:02 [PATCH 0/5] vfs: track per-sb writeback errors and report them via fsinfo() Jeff Layton
2018-06-04 18:03 ` Jeff Layton [this message]
2018-06-04 18:03 ` [PATCH 2/5] buffer: record blockdev write errors in super_block that backs them Jeff Layton
2018-06-06 15:56   ` Jeff Layton
2018-06-19 10:40     ` Jeff Layton
2018-06-19 13:03       ` Jeff Layton
2018-06-04 18:03 ` [PATCH 3/5] errseq: add a new errseq_scrape function Jeff Layton
2018-06-04 18:03 ` [PATCH 4/5] vfs: allow fsinfo to fetch the current state of s_wb_err Jeff Layton
2018-06-04 18:03 ` [PATCH 5/5] samples: extend test-fsinfo to access error_state Jeff Layton

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