From 19495f70d1ebcdc732dd3c94f5968a4bff198ae5 Mon Sep 17 00:00:00 2001 From: Anatolij Gustschin Date: Thu, 7 Jul 2011 12:25:02 +0200 Subject: UBIFS: fix master node recovery When the 1st LEB was unmapped and written but 2nd LEB not, the master node recovery doesn't succeed after power cut. We see following error when mounting UBIFS partition on NOR flash: UBIFS error (pid 1137): ubifs_recover_master_node: failed to recover master node Correct 2nd master node offset check is needed to fix the problem. If the 2nd master node is at the end in the 2nd LEB, first master node is used for recovery. When checking for this condition we should check whether the master node is exactly at the end of the LEB (without remaining empty space) or whether it is followed by an empty space less than the master node size. Artem: when the error happened, offs2 = 261120, sz = 512, c->leb_size = 262016. Signed-off-by: Anatolij Gustschin Signed-off-by: Artem Bityutskiy --- fs/ubifs/recovery.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'fs/ubifs') diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c index 51bcf4227b29..af02790d9328 100644 --- a/fs/ubifs/recovery.c +++ b/fs/ubifs/recovery.c @@ -274,7 +274,8 @@ int ubifs_recover_master_node(struct ubifs_info *c) if (cor1) goto out_err; mst = mst1; - } else if (offs1 == 0 && offs2 + sz >= c->leb_size) { + } else if (offs1 == 0 && + c->leb_size - offs2 - sz < sz) { /* 1st LEB was unmapped and written, 2nd not */ if (cor1) goto out_err; -- cgit v1.2.1