[PATCH v2 16/20] xfsprogs/repair: pull the build_agi() call up out of the inode tree build

[Brian Foster <bfoster@xxxxxxxxxx>]

Pull the build_agi() call out of build_ino_tree() in phase 5. This
is to prepare for finobt support, in which build_agi() will require
context from multiple inode tree reconstructions (both the inode
allocation tree and free inode tree, when it exists).

Create the new 'agi_stat' structure to carry the requisite state
from the build_ino_tree() operation to build_agi().

Signed-off-by: Brian Foster <bfoster@xxxxxxxxxx>
---
 repair/phase5.c | 36 +++++++++++++++++++++++++++---------
 1 file changed, 27 insertions(+), 9 deletions(-)

diff --git a/repair/phase5.c b/repair/phase5.c
index 10ed1eb..9632d2c 100644
--- a/repair/phase5.c
+++ b/repair/phase5.c
@@ -74,6 +74,15 @@ typedef struct bt_status  {
        bt_stat_level_t         level[XFS_BTREE_MAXLEVELS];
 } bt_status_t;
 
+/*
+ * extra metadata for the agi
+ */
+struct agi_stat {
+       xfs_agino_t             first_agino;
+       xfs_agino_t             count;
+       xfs_agino_t             freecount;
+};
+
 static __uint64_t      *sb_icount_ag;          /* allocated inodes per ag */
 static __uint64_t      *sb_ifree_ag;           /* free inodes per ag */
 static __uint64_t      *sb_fdblocks_ag;        /* free data blocks per ag */
@@ -1053,8 +1062,7 @@ prop_ino_cursor(xfs_mount_t *mp, xfs_agnumber_t agno, 
bt_status_t *btree_curs,
  */
 static void
 build_agi(xfs_mount_t *mp, xfs_agnumber_t agno,
-               bt_status_t *btree_curs, xfs_agino_t first_agino,
-               xfs_agino_t count, xfs_agino_t freecount)
+               bt_status_t *btree_curs, struct agi_stat *agi_stat)
 {
        xfs_buf_t       *agi_buf;
        xfs_agi_t       *agi;
@@ -1075,11 +1083,11 @@ build_agi(xfs_mount_t *mp, xfs_agnumber_t agno,
        else
                agi->agi_length = cpu_to_be32(mp->m_sb.sb_dblocks -
                        (xfs_drfsbno_t) mp->m_sb.sb_agblocks * agno);
-       agi->agi_count = cpu_to_be32(count);
+       agi->agi_count = cpu_to_be32(agi_stat->count);
        agi->agi_root = cpu_to_be32(btree_curs->root);
        agi->agi_level = cpu_to_be32(btree_curs->num_levels);
-       agi->agi_freecount = cpu_to_be32(freecount);
-       agi->agi_newino = cpu_to_be32(first_agino);
+       agi->agi_freecount = cpu_to_be32(agi_stat->freecount);
+       agi->agi_newino = cpu_to_be32(agi_stat->first_agino);
        agi->agi_dirino = cpu_to_be32(NULLAGINO);
 
        for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++)  
@@ -1097,7 +1105,8 @@ build_agi(xfs_mount_t *mp, xfs_agnumber_t agno,
  */
 static void
 build_ino_tree(xfs_mount_t *mp, xfs_agnumber_t agno,
-               bt_status_t *btree_curs, __uint32_t magic)
+               bt_status_t *btree_curs, __uint32_t magic,
+               struct agi_stat *agi_stat)
 {
        xfs_agnumber_t          i;
        xfs_agblock_t           j;
@@ -1227,7 +1236,11 @@ build_ino_tree(xfs_mount_t *mp, xfs_agnumber_t agno,
                }
        }
 
-       build_agi(mp, agno, btree_curs, first_agino, count, freecount);
+       if (agi_stat) {
+               agi_stat->first_agino = first_agino;
+               agi_stat->count = count;
+               agi_stat->freecount = freecount;
+       }
 }
 
 /*
@@ -1484,6 +1497,7 @@ phase5_func(
 #endif
        xfs_agblock_t   num_extents;
        __uint32_t      magic;
+       struct agi_stat agi_stat = {0,};
 
        if (verbose)
                do_log(_("        - agno = %d\n"), agno);
@@ -1615,12 +1629,16 @@ phase5_func(
                build_agf_agfl(mp, agno, &bno_btree_curs,
                                &bcnt_btree_curs, freeblks1, extra_blocks);
                /*
-                * build inode allocation tree.  this also build the agi
+                * build inode allocation tree.
                 */
                magic = xfs_sb_version_hascrc(&mp->m_sb) ?
                                XFS_IBT_CRC_MAGIC : XFS_IBT_MAGIC;
-               build_ino_tree(mp, agno, &ino_btree_curs, magic);
+               build_ino_tree(mp, agno, &ino_btree_curs, magic, &agi_stat);
                write_cursor(&ino_btree_curs);
+
+               /* build the agi */
+               build_agi(mp, agno, &ino_btree_curs, &agi_stat);
+
                /*
                 * tear down cursors
                 */
-- 
1.8.1.4