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xfs: convert XFS_AGFL_SIZE to a helper function 

commit a78ee256c3 upstream.

The AGFL size calculation is about to get more complex, so lets turn
the macro into a function first and remove the macro.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
[darrick: forward port to newer kernel, simplify the helper]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
pull/10/head
Dave Chinner 2018-03-06 17:08:32 -08:00 committed by Greg Kroah-Hartman
parent 54978daa9d
commit d9a59eac3f
4 changed files with 28 additions and 20 deletions
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31
fs/xfs/libxfs/xfs_alloc.c
View File

@ -52,6 +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 *);
/*
* Size of the AGFL. For CRC-enabled filesystes we steal a couple of slots in
* the beginning of the block for a proper header with the location information
* and CRC.
*/
unsigned int
xfs_agfl_size(
struct xfs_mount *mp)
{
unsigned int size = mp->m_sb.sb_sectsize;
if (xfs_sb_version_hascrc(&mp->m_sb))
size -= sizeof(struct xfs_agfl);
return size / sizeof(xfs_agblock_t);
}
unsigned int
xfs_refc_block(
struct xfs_mount *mp)
@ -540,7 +557,7 @@ xfs_agfl_verify(
if (bp->b_pag && be32_to_cpu(agfl->agfl_seqno) != bp->b_pag->pag_agno)
return false;
for (i = 0; i < XFS_AGFL_SIZE(mp); i++) {
for (i = 0; i < xfs_agfl_size(mp); i++) {
if (be32_to_cpu(agfl->agfl_bno[i]) != NULLAGBLOCK &&
be32_to_cpu(agfl->agfl_bno[i]) >= mp->m_sb.sb_agblocks)
return false;
@ -2252,7 +2269,7 @@ xfs_alloc_get_freelist(
bno = be32_to_cpu(agfl_bno[be32_to_cpu(agf->agf_flfirst)]);
be32_add_cpu(&agf->agf_flfirst, 1);
xfs_trans_brelse(tp, agflbp);
if (be32_to_cpu(agf->agf_flfirst) == XFS_AGFL_SIZE(mp))
if (be32_to_cpu(agf->agf_flfirst) == xfs_agfl_size(mp))
agf->agf_flfirst = 0;
pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
@ -2363,7 +2380,7 @@ xfs_alloc_put_freelist(
be32_to_cpu(agf->agf_seqno), &agflbp)))
return error;
be32_add_cpu(&agf->agf_fllast, 1);
if (be32_to_cpu(agf->agf_fllast) == XFS_AGFL_SIZE(mp))
if (be32_to_cpu(agf->agf_fllast) == xfs_agfl_size(mp))
agf->agf_fllast = 0;
pag = xfs_perag_get(mp, be32_to_cpu(agf->agf_seqno));
@ -2381,7 +2398,7 @@ xfs_alloc_put_freelist(
xfs_alloc_log_agf(tp, agbp, logflags);
ASSERT(be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp));
ASSERT(be32_to_cpu(agf->agf_flcount) <= xfs_agfl_size(mp));
agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, agflbp);
blockp = &agfl_bno[be32_to_cpu(agf->agf_fllast)];
@ -2414,9 +2431,9 @@ xfs_agf_verify(
if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
be32_to_cpu(agf->agf_flfirst) < XFS_AGFL_SIZE(mp) &&
be32_to_cpu(agf->agf_fllast) < XFS_AGFL_SIZE(mp) &&
be32_to_cpu(agf->agf_flcount) <= XFS_AGFL_SIZE(mp)))
be32_to_cpu(agf->agf_flfirst) < xfs_agfl_size(mp) &&
be32_to_cpu(agf->agf_fllast) < xfs_agfl_size(mp) &&
be32_to_cpu(agf->agf_flcount) <= xfs_agfl_size(mp)))
return false;
if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 ||

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

@ -26,6 +26,8 @@ struct xfs_trans;
extern struct workqueue_struct *xfs_alloc_wq;
unsigned int xfs_agfl_size(struct xfs_mount *mp);
/*
* Freespace allocation types. Argument to xfs_alloc_[v]extent.
*/

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

@ -798,24 +798,13 @@ typedef struct xfs_agi {
&(XFS_BUF_TO_AGFL(bp)->agfl_bno[0]) : \
(__be32 *)(bp)->b_addr)
/*
* Size of the AGFL. For CRC-enabled filesystes we steal a couple of
* slots in the beginning of the block for a proper header with the
* location information and CRC.
*/
#define XFS_AGFL_SIZE(mp) \
(((mp)->m_sb.sb_sectsize - \
(xfs_sb_version_hascrc(&((mp)->m_sb)) ? \
sizeof(struct xfs_agfl) : 0)) / \
sizeof(xfs_agblock_t))
typedef struct xfs_agfl {
__be32 agfl_magicnum;
__be32 agfl_seqno;
uuid_t agfl_uuid;
__be64 agfl_lsn;
__be32 agfl_crc;
__be32 agfl_bno[]; /* actually XFS_AGFL_SIZE(mp) */
__be32 agfl_bno[]; /* actually xfs_agfl_size(mp) */
} __attribute__((packed)) xfs_agfl_t;
#define XFS_AGFL_CRC_OFF offsetof(struct xfs_agfl, agfl_crc)

2
fs/xfs/xfs_fsops.c
View File

@ -294,7 +294,7 @@ xfs_growfs_data_private(
}
agfl_bno = XFS_BUF_TO_AGFL_BNO(mp, bp);
for (bucket = 0; bucket < XFS_AGFL_SIZE(mp); bucket++)
for (bucket = 0; bucket < xfs_agfl_size(mp); bucket++)
agfl_bno[bucket] = cpu_to_be32(NULLAGBLOCK);
error = xfs_bwrite(bp);