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xfs: clean up XFS_MIN_FREELIST macros 

We no longer calculate the minimum freelist size from the on-disk
AGF, so we don't need the macros used for this. That means the
nested macros can be cleaned up, and turn this into an actual
function so the logic is clear and concise. This will make it much
easier to add support for the rmap btree when the time comes.

This also gets rid of the XFS_AG_MAXLEVELS macro used by these
freelist macros as it is simply a wrapper around a single variable.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Dave Chinner 2015-06-22 10:13:30 +10:00 committed by Dave Chinner
parent 396503fc83
commit 496817b4be
7 changed files with 26 additions and 21 deletions
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22
fs/xfs/libxfs/xfs_alloc.c
View File

@ -1838,6 +1838,23 @@ xfs_alloc_longest_free_extent(
return pag->pagf_flcount > 0 || pag->pagf_longest > 0;
}
unsigned int
xfs_alloc_min_freelist(
struct xfs_mount *mp,
struct xfs_perag *pag)
{
unsigned int min_free;
/* space needed by-bno freespace btree */
min_free = min_t(unsigned int, pag->pagf_levels[XFS_BTNUM_BNOi] + 1,
mp->m_ag_maxlevels);
/* space needed by-size freespace btree */
min_free += min_t(unsigned int, pag->pagf_levels[XFS_BTNUM_CNTi] + 1,
mp->m_ag_maxlevels);
return min_free;
}
/*
* Check if the operation we are fixing up the freelist for should go ahead or
* not. If we are freeing blocks, we always allow it, otherwise the allocation
@ -1912,7 +1929,7 @@ xfs_alloc_fix_freelist(
goto out_agbp_relse;
}
need = XFS_MIN_FREELIST_PAG(pag, mp);
need = xfs_alloc_min_freelist(mp, pag);
if (!xfs_alloc_space_available(args, need, flags))
goto out_agbp_relse;
@ -1931,9 +1948,8 @@ xfs_alloc_fix_freelist(
}
}
/* If there isn't enough total space or single-extent, reject it. */
need = XFS_MIN_FREELIST_PAG(pag, mp);
need = xfs_alloc_min_freelist(mp, pag);
if (!xfs_alloc_space_available(args, need, flags))
goto out_agbp_relse;

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

@ -130,6 +130,8 @@ typedef struct xfs_alloc_arg {
xfs_extlen_t xfs_alloc_longest_free_extent(struct xfs_mount *mp,
struct xfs_perag *pag, xfs_extlen_t need);
unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
struct xfs_perag *pag);
/*
* Compute and fill in value of m_ag_maxlevels.

2
fs/xfs/libxfs/xfs_bmap.c
View File

@ -3508,7 +3508,7 @@ xfs_bmap_longest_free_extent(
}
longest = xfs_alloc_longest_free_extent(mp, pag,
XFS_MIN_FREELIST_PAG(pag, mp));
xfs_alloc_min_freelist(mp, pag));
if (*blen < longest)
*blen = longest;

13
fs/xfs/libxfs/xfs_format.h
View File

@ -758,19 +758,6 @@ typedef struct xfs_agfl {
#define XFS_AGFL_CRC_OFF offsetof(struct xfs_agfl, agfl_crc)
#define XFS_AG_MAXLEVELS(mp) ((mp)->m_ag_maxlevels)
#define XFS_MIN_FREELIST_RAW(bl,cl,mp) \
(MIN(bl + 1, XFS_AG_MAXLEVELS(mp)) + MIN(cl + 1, XFS_AG_MAXLEVELS(mp)))
#define XFS_MIN_FREELIST(a,mp) \
(XFS_MIN_FREELIST_RAW( \
be32_to_cpu((a)->agf_levels[XFS_BTNUM_BNOi]), \
be32_to_cpu((a)->agf_levels[XFS_BTNUM_CNTi]), mp))
#define XFS_MIN_FREELIST_PAG(pag,mp) \
(XFS_MIN_FREELIST_RAW( \
(unsigned int)(pag)->pagf_levels[XFS_BTNUM_BNOi], \
(unsigned int)(pag)->pagf_levels[XFS_BTNUM_CNTi], mp))
#define XFS_AGB_TO_FSB(mp,agno,agbno) \
(((xfs_fsblock_t)(agno) << (mp)->m_sb.sb_agblklog) | (agbno))
#define XFS_FSB_TO_AGNO(mp,fsbno) \

4
fs/xfs/libxfs/xfs_trans_resv.h
View File

@ -73,9 +73,9 @@ struct xfs_trans_resv {
* 2 trees * (2 blocks/level * max depth - 1) * block size
*/
#define XFS_ALLOCFREE_LOG_RES(mp,nx) \
((nx) * (2 * XFS_FSB_TO_B((mp), 2 * XFS_AG_MAXLEVELS(mp) - 1)))
((nx) * (2 * XFS_FSB_TO_B((mp), 2 * (mp)->m_ag_maxlevels - 1)))
#define XFS_ALLOCFREE_LOG_COUNT(mp,nx) \
((nx) * (2 * (2 * XFS_AG_MAXLEVELS(mp) - 1)))
((nx) * (2 * (2 * (mp)->m_ag_maxlevels - 1)))
/*
* Per-directory log reservation for any directory change.

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

@ -67,7 +67,7 @@
#define XFS_DIOSTRAT_SPACE_RES(mp, v) \
(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
#define XFS_GROWFS_SPACE_RES(mp) \
(2 * XFS_AG_MAXLEVELS(mp))
(2 * (mp)->m_ag_maxlevels)
#define XFS_GROWFSRT_SPACE_RES(mp,b) \
((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
#define XFS_LINK_SPACE_RES(mp,nl) \

2
fs/xfs/xfs_filestream.c
View File

@ -197,7 +197,7 @@ xfs_filestream_pick_ag(
}
longest = xfs_alloc_longest_free_extent(mp, pag,
XFS_MIN_FREELIST_PAG(pag, mp));
xfs_alloc_min_freelist(mp, pag));
if (((minlen && longest >= minlen) ||
(!minlen && pag->pagf_freeblks >= minfree)) &&
(!pag->pagf_metadata || !(flags & XFS_PICK_USERDATA) ||