From 4f1ab9b01d34eac9fc958f7150d3bf266dcc1685 Mon Sep 17 00:00:00 2001 From: Ben Gardiner Date: Mon, 30 May 2011 14:56:14 -0400 Subject: [PATCH] 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(). Artem: tweaked the patch, added similar assertion to the write buffer write path. Signed-off-by: Ben Gardiner Reviewed-by: Matthew L. Creech Signed-off-by: Artem Bityutskiy --- fs/ubifs/io.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c index 166951e0dcd3..3be645e012c9 100644 --- a/fs/ubifs/io.c +++ b/fs/ubifs/io.c @@ -581,6 +581,7 @@ int ubifs_wbuf_write_nolock(struct ubifs_wbuf *wbuf, void *buf, int len) ubifs_assert(wbuf->size % c->min_io_size == 0); ubifs_assert(mutex_is_locked(&wbuf->io_mutex)); ubifs_assert(!c->ro_media && !c->ro_mount); + ubifs_assert(!c->space_fixup); if (c->leb_size - wbuf->offs >= c->max_write_size) ubifs_assert(!((wbuf->offs + wbuf->size) % c->max_write_size)); @@ -759,6 +760,7 @@ int ubifs_write_node(struct ubifs_info *c, void *buf, int len, int lnum, ubifs_assert(lnum >= 0 && lnum < c->leb_cnt && offs >= 0); ubifs_assert(offs % c->min_io_size == 0 && offs < c->leb_size); ubifs_assert(!c->ro_media && !c->ro_mount); + ubifs_assert(!c->space_fixup); if (c->ro_error) return -EROFS;