diff options
| author |   Steven Whitehouse <swhiteho@redhat.com> | 2006-10-31 14:44:50 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-11-30 10:33:17 -0500 |
| commit | 2a2c98247b822db8df037a56c27201f9d716ac66 (patch) | |
| tree | cadb8e1f27da7f931a6fec84abd4200719331692 /fs | |
| parent | [GFS2] split and annotate gfs2_log_head (diff) | |
| download | linux-dev-2a2c98247b822db8df037a56c27201f9d716ac66.tar.xz linux-dev-2a2c98247b822db8df037a56c27201f9d716ac66.zip | |
[GFS2] Fix crc32 calculation in recovery.c
Commit "[GFS2] split and annotate gfs2_log_head" resulted in an incorrect
checksum calculation for log headers. This patch corrects the
problem without resorting to copying the whole log header as
the previous code used to.
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/gfs2/recovery.c | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c index 447816241626..4acf238e1db6 100644 --- a/fs/gfs2/recovery.c +++ b/fs/gfs2/recovery.c @@ -136,6 +136,7 @@ static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk, { struct buffer_head *bh; struct gfs2_log_header_host lh; +static const u32 nothing = 0; u32 hash; int error; @@ -143,11 +144,11 @@ static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk, if (error) return error; - memcpy(&lh, bh->b_data, sizeof(struct gfs2_log_header)); /* XXX */ - lh.lh_hash = 0; - hash = gfs2_disk_hash((char *)&lh, sizeof(struct gfs2_log_header)); + hash = crc32_le((u32)~0, bh->b_data, sizeof(struct gfs2_log_header) - + sizeof(u32)); + hash = crc32_le(hash, (unsigned char const *)¬hing, sizeof(nothing)); + hash ^= (u32)~0; gfs2_log_header_in(&lh, bh->b_data); - brelse(bh); if (lh.lh_header.mh_magic != GFS2_MAGIC || |