linux-kernel - [PATCH 1/3] UBIFS: assert no fixup when writing a node

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Message-Id: <4a63933a3365daf8d1ec38d22c9029a949f3eccd.1306780983.git.bengardiner@nanometrics.ca>
Date:	Mon, 30 May 2011 14:56:14 -0400
From:	Ben Gardiner <bengardiner@...ometrics.ca>
To:	Artem Bityutskiy <dedekind1@...il.com>,
	Adrian Hunter <adrian.hunter@...ia.com>
Cc:	linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org,
	"Matthew L. Creech" <mlcreech@...il.com>
Subject: [PATCH 1/3] UBIFS: assert no fixup when writing a node

The current free space fixup can result in some writing to the UBI volume
when the space_fixup flag is set.

To catch instances where UBIFS is writing to the NAND while the space_fixup
flag is set, add an assert to ubifs_write_node().

Signed-off-by: Ben Gardiner <bengardiner@...ometrics.ca>

---
 fs/ubifs/io.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index 166951e..db298de 100644
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -763,6 +763,8 @@ int ubifs_write_node(struct ubifs_info *c, void *buf, int len, int lnum,
 	if (c->ro_error)
 		return -EROFS;
 
+	ubifs_assert(!c->space_fixup);
+
 	ubifs_prepare_node(c, buf, len, 1);
 	err = ubi_leb_write(c->ubi, lnum, buf, offs, buf_len, dtype);
 	if (err) {
-- 
1.7.4.1

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