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authorChristoph Hellwig <hch@lst.de>2008-11-28 14:23:37 +1100
committerNiv Sardi <xaiki@sgi.com>2008-12-01 11:37:15 +1100
commit5e1be0fb1a3950597aeda448698e85b0595a2e92 (patch)
treee9cb423d6f253b689a9e0cfb4a1d429de37959cd /fs/xfs/xfs_ag.h
parent26c5295135d10fc90cbf160adfda392d91f58279 (diff)
downloadlinux-5e1be0fb1a3950597aeda448698e85b0595a2e92.tar.bz2
[XFS] factor out xfs_read_agi helper
Add a helper to read the AGI header and perform basic verification. Based on hunks from a larger patch from Dave Chinner. (First sent on Juli 23rd) Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Niv Sardi <xaiki@sgi.com>
Diffstat (limited to 'fs/xfs/xfs_ag.h')
-rw-r--r--fs/xfs/xfs_ag.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/xfs/xfs_ag.h b/fs/xfs/xfs_ag.h
index 2bfd86329141..f4a315390c61 100644
--- a/fs/xfs/xfs_ag.h
+++ b/fs/xfs/xfs_ag.h
@@ -142,6 +142,9 @@ typedef struct xfs_agi {
#define XFS_AGI_BLOCK(mp) XFS_HDR_BLOCK(mp, XFS_AGI_DADDR(mp))
#define XFS_BUF_TO_AGI(bp) ((xfs_agi_t *)XFS_BUF_PTR(bp))
+extern int xfs_read_agi(struct xfs_mount *mp, struct xfs_trans *tp,
+ xfs_agnumber_t agno, struct xfs_buf **bpp);
+
/*
* The third a.g. block contains the a.g. freelist, an array
* of block pointers to blocks owned by the allocation btree code.