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[PATCH v3 20/20] xfsprogs/db: add finobt support to metadump

To: xfs@xxxxxxxxxxx
Subject: [PATCH v3 20/20] xfsprogs/db: add finobt support to metadump
From: Brian Foster <bfoster@xxxxxxxxxx>
Date: Thu, 10 Apr 2014 12:11:10 -0400
Delivered-to: xfs@xxxxxxxxxxx
In-reply-to: <1397146270-42993-1-git-send-email-bfoster@xxxxxxxxxx>
References: <1397146270-42993-1-git-send-email-bfoster@xxxxxxxxxx>
Include the free inode btree in metadump images. If the source fs
is finobt-enabled, run an additional scan_btree() of the finobt.
Since the private 'agi' scanfunc_ino() parameter is unused, change
the private parameter to a flag that indicates whether the current
scan is for the inobt or finobt. If the latter, we skip copying the
actual inode chunks as this work is already performed by the inobt
scan.

Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
---
 db/metadump.c | 25 ++++++++++++++++++++++++-
 1 file changed, 24 insertions(+), 1 deletion(-)

diff --git a/db/metadump.c b/db/metadump.c
index 09bb85a..38cd441 100644
--- a/db/metadump.c
+++ b/db/metadump.c
@@ -1917,6 +1917,7 @@ scanfunc_ino(
        xfs_inobt_ptr_t         *pp;
        int                     i;
        int                     numrecs;
+       int                     finobt = *(int *) arg;
 
        numrecs = be16_to_cpu(block->bb_numrecs);
 
@@ -1928,6 +1929,14 @@ scanfunc_ino(
                                        typtab[btype].name, agno, agbno);
                        numrecs = mp->m_inobt_mxr[0];
                }
+
+               /*
+                * Only copy the btree blocks for the finobt. The inobt scan
+                * copies the inode chunks.
+                */
+               if (finobt)
+                       return 1;
+
                rp = XFS_INOBT_REC_ADDR(mp, block, 1);
                for (i = 0; i < numrecs; i++, rp++) {
                        if (!copy_inode_chunk(agno, rp))
@@ -1967,6 +1976,7 @@ copy_inodes(
 {
        xfs_agblock_t           root;
        int                     levels;
+       int                     finobt = 0;
 
        root = be32_to_cpu(agi->agi_root);
        levels = be32_to_cpu(agi->agi_level);
@@ -1985,7 +1995,20 @@ copy_inodes(
                return 1;
        }
 
-       return scan_btree(agno, root, levels, TYP_INOBT, agi, scanfunc_ino);
+       if (!scan_btree(agno, root, levels, TYP_INOBT, &finobt, scanfunc_ino))
+               return 0;
+
+       if (xfs_sb_version_hasfinobt(&mp->m_sb)) {
+               root = be32_to_cpu(agi->agi_free_root);
+               levels = be32_to_cpu(agi->agi_free_level);
+
+               finobt = 1;
+               if (!scan_btree(agno, root, levels, TYP_INOBT, &finobt,
+                               scanfunc_ino))
+                       return 0;
+       }
+
+       return 1;
 }
 
 static int
-- 
1.8.3.1

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