>From 0da3585e1ef650d3224b4d6f9799558d1d99fa1e Mon Sep 17 00:00:00 2001
From: Srinivasa Ds <[email protected]>
Date: Thu, 30 Nov 2006 15:04:55 +0530
Subject: [PATCH] [GFS2] Mount problem with the GFS2 code
While mounting the gfs2 filesystem,our test team had a problem and we
got this error message.
=======================================================
GFS2: fsid=: Trying to join cluster "lock_nolock", "dasde1"
GFS2: fsid=dasde1.0: Joined cluster. Now mounting FS...
GFS2: not a GFS2 filesystem
GFS2: fsid=dasde1.0: can't read superblock: -22
==========================================================================
On debugging further we found that problem is while reading the super
block(gfs2_read_super) and comparing the magic number in it.
When I replace the submit_bio() call(present in gfs2_read_super) with
the sb_getblk() and ll_rw_block(), mount operation succeded.
On further analysis we found that before calling submit_bio(),
bio->bi_sector was set to "sector" variable. This "sector" variable has
the same value of bh->b_blocknr(block number). Hence there is a need to
multiply this valuwith (blocksize >> 9)(9 because,sector size
2^9,samething happens in ll_rw_block also, before calling submit_bio()).
So I have developed the patch which solves this problem. Please let me
know your comments.
================================================================
Signed-off-by: Srinivasa DS <[email protected]>
Signed-off-by: Steven Whitehouse <[email protected]>
---
fs/gfs2/super.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index 1408c5f..3b22727 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -199,7 +199,7 @@ struct page *gfs2_read_super(struct supe
return NULL;
}
- bio->bi_sector = sector;
+ bio->bi_sector = sector * (sb->s_blocksize >> 9);
bio->bi_bdev = sb->s_bdev;
bio_add_page(bio, page, PAGE_SIZE, 0);
--
1.4.1
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