linux-ext4 - [PATCH 3/3] ext3: introduce ext3_error_remove

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Date:	Thu, 25 Oct 2012 11:12:49 -0400
From:	Naoya Horiguchi <n-horiguchi@...jp.nec.com>
To:	Andi Kleen <andi.kleen@...el.com>, Tony Luck <tony.luck@...el.com>
Cc:	Wu Fengguang <fengguang.wu@...el.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Jan Kara <jack@...e.cz>,
	"Jun'ichi Nomura" <j-nomura@...jp.nec.com>,
	Akira Fujita <a-fujita@...jp.nec.com>,
	Naoya Horiguchi <n-horiguchi@...jp.nec.com>,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org,
	linux-ext4@...r.kernel.org
Subject: [PATCH 3/3] ext3: introduce ext3_error_remove_page

What I suggested in the previous patch for ext4 is ditto with ext3,
so do the same thing for ext3.

Signed-off-by: Naoya Horiguchi <n-horiguchi@...jp.nec.com>
---
 fs/ext3/inode.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git v3.7-rc2.orig/fs/ext3/inode.c v3.7-rc2/fs/ext3/inode.c
index 7e87e37..7f708bf 100644
--- v3.7-rc2.orig/fs/ext3/inode.c
+++ v3.7-rc2/fs/ext3/inode.c
@@ -1967,6 +1967,33 @@ static int ext3_journalled_set_page_dirty(struct page *page)
 	return __set_page_dirty_nobuffers(page);
 }
 
+static int ext3_error_remove_page(struct address_space *mapping,
+				struct page *page)
+{
+	struct inode *inode = mapping->host;
+	struct buffer_head *bh, *head;
+	ext3_fsblk_t block = 0;
+
+	if (!PageDirty(page) || !page_has_buffers(page))
+		goto remove_page;
+
+	/* Lost data. Handle as critical fs error. */
+	bh = head = page_buffers(page);
+	do {
+		if (buffer_dirty(bh)) {
+			block = bh->b_blocknr;
+			ext3_error(inode->i_sb, "ext3_error_remove_page",
+				"inode #%lu: block %lu: "
+				"Removing dirty pagecache page",
+				inode->i_ino, block);
+		}
+		bh = bh->b_this_page;
+	} while (bh != head);
+
+remove_page:
+	return generic_error_remove_page(mapping, page);
+}
+
 static const struct address_space_operations ext3_ordered_aops = {
 	.readpage		= ext3_readpage,
 	.readpages		= ext3_readpages,
@@ -1979,7 +2006,7 @@ static const struct address_space_operations ext3_ordered_aops = {
 	.direct_IO		= ext3_direct_IO,
 	.migratepage		= buffer_migrate_page,
 	.is_partially_uptodate  = block_is_partially_uptodate,
-	.error_remove_page	= generic_error_remove_page,
+	.error_remove_page	= ext3_error_remove_page,
 };
 
 static const struct address_space_operations ext3_writeback_aops = {
@@ -1994,7 +2021,7 @@ static const struct address_space_operations ext3_writeback_aops = {
 	.direct_IO		= ext3_direct_IO,
 	.migratepage		= buffer_migrate_page,
 	.is_partially_uptodate  = block_is_partially_uptodate,
-	.error_remove_page	= generic_error_remove_page,
+	.error_remove_page	= ext3_error_remove_page,
 };
 
 static const struct address_space_operations ext3_journalled_aops = {
@@ -2008,7 +2035,7 @@ static const struct address_space_operations ext3_journalled_aops = {
 	.invalidatepage		= ext3_invalidatepage,
 	.releasepage		= ext3_releasepage,
 	.is_partially_uptodate  = block_is_partially_uptodate,
-	.error_remove_page	= generic_error_remove_page,
+	.error_remove_page	= ext3_error_remove_page,
 };
 
 void ext3_set_aops(struct inode *inode)
-- 
1.7.11.7

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