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xfs: refcount btree add more reserved blocks

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Since XFS reserves a small amount of space in each AG as the minimum
free space needed for an operation, save some more space in case we
touch the refcount btree.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Darrick J. Wong 2016-10-03 09:11:17 -07:00
parent 46eeb521b9
commit af30dfa144
2 changed files with 15 additions and 0 deletions
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13
fs/xfs/libxfs/xfs_alloc.c
View File

@ -52,10 +52,23 @@ STATIC int xfs_alloc_ag_vextent_size(xfs_alloc_arg_t *);
STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *,
xfs_btree_cur_t *, xfs_agblock_t *, xfs_extlen_t *, int *);
unsigned int
xfs_refc_block(
struct xfs_mount *mp)
{
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
return XFS_RMAP_BLOCK(mp) + 1;
if (xfs_sb_version_hasfinobt(&mp->m_sb))
return XFS_FIBT_BLOCK(mp) + 1;
return XFS_IBT_BLOCK(mp) + 1;
}
xfs_extlen_t
xfs_prealloc_blocks(
struct xfs_mount *mp)
{
if (xfs_sb_version_hasreflink(&mp->m_sb))
return xfs_refc_block(mp) + 1;
if (xfs_sb_version_hasrmapbt(&mp->m_sb))
return XFS_RMAP_BLOCK(mp) + 1;
if (xfs_sb_version_hasfinobt(&mp->m_sb))

2
fs/xfs/libxfs/xfs_format.h
View File

@ -1455,6 +1455,8 @@ typedef __be32 xfs_rmap_ptr_t;
*/
#define XFS_REFC_CRC_MAGIC 0x52334643 /* 'R3FC' */
unsigned int xfs_refc_block(struct xfs_mount *mp);
/*
* BMAP Btree format definitions