From: Dave Chinner <dchinner@xxxxxxxxxx>
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@xxxxxxxxxx>
---
fs/xfs/libxfs/xfs_alloc.c | 33 ++++++++++++++++++++++++++-------
fs/xfs/libxfs/xfs_alloc.h | 2 ++
fs/xfs/libxfs/xfs_format.h | 13 +------------
fs/xfs/xfs_fsops.c | 2 +-
4 files changed, 30 insertions(+), 20 deletions(-)
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 05b5243..23559b9 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -63,6 +63,24 @@ xfs_prealloc_blocks(
}
/*
+ * 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.
+ */
+int
+xfs_agfl_size(
+ struct xfs_mount *mp)
+
+{
+ int size = mp->m_sb.sb_sectsize;
+
+ if (!xfs_sb_version_hascrc(&mp->m_sb))
+ return size / sizeof(xfs_agblock_t);
+
+ return (size - sizeof(struct xfs_agfl)) / sizeof(xfs_agblock_t);
+}
+
+/*
* In order to avoid ENOSPC-related deadlock caused by out-of-order locking of
* AGF buffer (PV 947395), we place constraints on the relationship among
* actual allocations for data blocks, freelist blocks, and potential file data
@@ -554,7 +572,7 @@ 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;
@@ -2230,7 +2248,7 @@ 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));
@@ -2338,7 +2356,7 @@ 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));
@@ -2356,7 +2374,7 @@ 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)];
@@ -2377,6 +2395,7 @@ xfs_agf_verify(
struct xfs_buf *bp)
{
struct xfs_agf *agf = XFS_BUF_TO_AGF(bp);
+ int32_t agfl_size = xfs_agfl_size(mp);
if (xfs_sb_version_hascrc(&mp->m_sb)) {
if (!uuid_equal(&agf->agf_uuid, &mp->m_sb.sb_meta_uuid))
@@ -2389,9 +2408,9 @@ 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) < agfl_size &&
+ be32_to_cpu(agf->agf_fllast) < agfl_size &&
+ be32_to_cpu(agf->agf_flcount) <= agfl_size))
return false;
if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > XFS_BTREE_MAXLEVELS ||
diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h
index 6fe2d6b..cfdd02f 100644
--- a/fs/xfs/libxfs/xfs_alloc.h
+++ b/fs/xfs/libxfs/xfs_alloc.h
@@ -202,6 +202,8 @@ xfs_alloc_get_rec(
int xfs_read_agf(struct xfs_mount *mp, struct xfs_trans *tp,
xfs_agnumber_t agno, int flags, struct xfs_buf **bpp);
+int xfs_agfl_size(struct xfs_mount *mp);
+
int xfs_alloc_fix_freelist(struct xfs_alloc_arg *args, int flags);
int xfs_free_extent_fix_freelist(struct xfs_trans *tp, xfs_agnumber_t agno,
struct xfs_buf **agbp);
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 270fb5c..60085f3 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -781,24 +781,13 @@ 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)
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index 0b7f986..622ca71 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -285,7 +285,7 @@ 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);
--
2.8.0.rc3
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