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xfs: support the XFS_BTNUM_FINOBT free inode btree type

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Define the AGI fields for the finobt root/level and add magic
numbers. Update the btree code to add support for the new
XFS_BTNUM_FINOBT inode btree.

The finobt root block is reserved immediately following the inobt
root block in the AG. Update XFS_PREALLOC_BLOCKS() to determine the
starting AG data block based on whether finobt support is enabled.

Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Brian Foster
2014-04-24 16:00:52 +10:00
committed by Dave Chinner
parent 8e2c84df20
commit aafc3c2465
10 changed files with 156 additions and 30 deletions
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60
fs/xfs/xfs_ialloc_btree.c
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@@ -67,6 +67,21 @@ xfs_inobt_set_root(
xfs_ialloc_log_agi(cur->bc_tp, agbp, XFS_AGI_ROOT | XFS_AGI_LEVEL);
}
STATIC void
xfs_finobt_set_root(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *nptr,
int inc) /* level change */
{
struct xfs_buf *agbp = cur->bc_private.a.agbp;
struct xfs_agi *agi = XFS_BUF_TO_AGI(agbp);
agi->agi_free_root = nptr->s;
be32_add_cpu(&agi->agi_free_level, inc);
xfs_ialloc_log_agi(cur->bc_tp, agbp,
XFS_AGI_FREE_ROOT | XFS_AGI_FREE_LEVEL);
}
STATIC int
xfs_inobt_alloc_block(
struct xfs_btree_cur *cur,
@@ -174,6 +189,17 @@ xfs_inobt_init_ptr_from_cur(
ptr->s = agi->agi_root;
}
STATIC void
xfs_finobt_init_ptr_from_cur(
struct xfs_btree_cur *cur,
union xfs_btree_ptr *ptr)
{
struct xfs_agi *agi = XFS_BUF_TO_AGI(cur->bc_private.a.agbp);
ASSERT(cur->bc_private.a.agno == be32_to_cpu(agi->agi_seqno));
ptr->s = agi->agi_free_root;
}
STATIC __int64_t
xfs_inobt_key_diff(
struct xfs_btree_cur *cur,
@@ -204,6 +230,7 @@ xfs_inobt_verify(
*/
switch (block->bb_magic) {
case cpu_to_be32(XFS_IBT_CRC_MAGIC):
case cpu_to_be32(XFS_FIBT_CRC_MAGIC):
if (!xfs_sb_version_hascrc(&mp->m_sb))
return false;
if (!uuid_equal(&block->bb_u.s.bb_uuid, &mp->m_sb.sb_uuid))
@@ -215,6 +242,7 @@ xfs_inobt_verify(
return false;
/* fall through */
case cpu_to_be32(XFS_IBT_MAGIC):
case cpu_to_be32(XFS_FIBT_MAGIC):
break;
default:
return 0;
@@ -318,6 +346,28 @@ static const struct xfs_btree_ops xfs_inobt_ops = {
#endif
};
static const struct xfs_btree_ops xfs_finobt_ops = {
.rec_len = sizeof(xfs_inobt_rec_t),
.key_len = sizeof(xfs_inobt_key_t),
.dup_cursor = xfs_inobt_dup_cursor,
.set_root = xfs_finobt_set_root,
.alloc_block = xfs_inobt_alloc_block,
.free_block = xfs_inobt_free_block,
.get_minrecs = xfs_inobt_get_minrecs,
.get_maxrecs = xfs_inobt_get_maxrecs,
.init_key_from_rec = xfs_inobt_init_key_from_rec,
.init_rec_from_key = xfs_inobt_init_rec_from_key,
.init_rec_from_cur = xfs_inobt_init_rec_from_cur,
.init_ptr_from_cur = xfs_finobt_init_ptr_from_cur,
.key_diff = xfs_inobt_key_diff,
.buf_ops = &xfs_inobt_buf_ops,
#if defined(DEBUG) || defined(XFS_WARN)
.keys_inorder = xfs_inobt_keys_inorder,
.recs_inorder = xfs_inobt_recs_inorder,
#endif
};
/*
* Allocate a new inode btree cursor.
*/
@@ -336,11 +386,17 @@ xfs_inobt_init_cursor(
cur->bc_tp = tp;
cur->bc_mp = mp;
cur->bc_nlevels = be32_to_cpu(agi->agi_level);
cur->bc_btnum = btnum;
if (btnum == XFS_BTNUM_INO) {
cur->bc_nlevels = be32_to_cpu(agi->agi_level);
cur->bc_ops = &xfs_inobt_ops;
} else {
cur->bc_nlevels = be32_to_cpu(agi->agi_free_level);
cur->bc_ops = &xfs_finobt_ops;
}
cur->bc_blocklog = mp->m_sb.sb_blocklog;
cur->bc_ops = &xfs_inobt_ops;
if (xfs_sb_version_hascrc(&mp->m_sb))
cur->bc_flags |= XFS_BTREE_CRC_BLOCKS;