From 0da3585e1ef650d3224b4d6f9799558d1d99fa1e Mon Sep 17 00:00:00 2001 From: Srinivasa Ds 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 Signed-off-by: Steven Whitehouse --- fs/gfs2/super.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c index 1408c5f3137..3b227274279 100644 --- a/fs/gfs2/super.c +++ b/fs/gfs2/super.c @@ -199,7 +199,7 @@ struct page *gfs2_read_super(struct super_block *sb, sector_t sector) 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); -- 2.41.1