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authorDarrick J. Wong <djwong@kernel.org>2021-10-13 19:02:19 +0200
committerDarrick J. Wong <djwong@kernel.org>2021-10-19 20:45:15 +0200
commit7cb3efb4cfdd4f3eb1f36b0ce39254b848ff2371 (patch)
tree251b07756be51fcb78fa909935cd2c579842d287 /fs/xfs/libxfs
parentxfs: dynamically allocate cursors based on maxlevels (diff)
downloadlinux-7cb3efb4cfdd4f3eb1f36b0ce39254b848ff2371.tar.xz
linux-7cb3efb4cfdd4f3eb1f36b0ce39254b848ff2371.zip
xfs: rename m_ag_maxlevels to m_allocbt_maxlevels
Years ago when XFS was thought to be much more simple, we introduced m_ag_maxlevels to specify the maximum btree height of per-AG btrees for a given filesystem mount. Then we observed that inode btrees don't actually have the same height and split that off; and now we have rmap and refcount btrees with much different geometries and separate maxlevels variables. The 'ag' part of the name doesn't make much sense anymore, so rename this to m_alloc_maxlevels to reinforce that this is the maximum height of the *free space* btrees. This sets us up for the next patch, which will add a variable to track the maximum height of all AG btrees. (Also take the opportunity to improve adjacent comments and fix minor style problems.) Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Dave Chinner <dchinner@redhat.com>
Diffstat (limited to 'fs/xfs/libxfs')
-rw-r--r--fs/xfs/libxfs/xfs_alloc.c19
-rw-r--r--fs/xfs/libxfs/xfs_alloc.h2
-rw-r--r--fs/xfs/libxfs/xfs_alloc_btree.c4
-rw-r--r--fs/xfs/libxfs/xfs_trans_resv.c2
-rw-r--r--fs/xfs/libxfs/xfs_trans_space.h2
5 files changed, 16 insertions, 13 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 55c5adc9b54e..2efb4f4539f1 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -2190,13 +2190,13 @@ xfs_free_ag_extent(
*/
/*
- * Compute and fill in value of m_ag_maxlevels.
+ * Compute and fill in value of m_alloc_maxlevels.
*/
void
xfs_alloc_compute_maxlevels(
xfs_mount_t *mp) /* file system mount structure */
{
- mp->m_ag_maxlevels = xfs_btree_compute_maxlevels(mp->m_alloc_mnr,
+ mp->m_alloc_maxlevels = xfs_btree_compute_maxlevels(mp->m_alloc_mnr,
(mp->m_sb.sb_agblocks + 1) / 2);
}
@@ -2255,14 +2255,14 @@ xfs_alloc_min_freelist(
const uint8_t *levels = pag ? pag->pagf_levels : fake_levels;
unsigned int min_free;
- ASSERT(mp->m_ag_maxlevels > 0);
+ ASSERT(mp->m_alloc_maxlevels > 0);
/* space needed by-bno freespace btree */
min_free = min_t(unsigned int, levels[XFS_BTNUM_BNOi] + 1,
- mp->m_ag_maxlevels);
+ mp->m_alloc_maxlevels);
/* space needed by-size freespace btree */
min_free += min_t(unsigned int, levels[XFS_BTNUM_CNTi] + 1,
- mp->m_ag_maxlevels);
+ mp->m_alloc_maxlevels);
/* space needed reverse mapping used space btree */
if (xfs_has_rmapbt(mp))
min_free += min_t(unsigned int, levels[XFS_BTNUM_RMAPi] + 1,
@@ -2903,13 +2903,16 @@ xfs_agf_verify(
if (be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) < 1 ||
be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) < 1 ||
- be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) > mp->m_ag_maxlevels ||
- be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) > mp->m_ag_maxlevels)
+ be32_to_cpu(agf->agf_levels[XFS_BTNUM_BNO]) >
+ mp->m_alloc_maxlevels ||
+ be32_to_cpu(agf->agf_levels[XFS_BTNUM_CNT]) >
+ mp->m_alloc_maxlevels)
return __this_address;
if (xfs_has_rmapbt(mp) &&
(be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) < 1 ||
- be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) > mp->m_rmap_maxlevels))
+ be32_to_cpu(agf->agf_levels[XFS_BTNUM_RMAP]) >
+ mp->m_rmap_maxlevels))
return __this_address;
if (xfs_has_rmapbt(mp) &&
diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h
index df4aefaf0046..2f3f8c2e0860 100644
--- a/fs/xfs/libxfs/xfs_alloc.h
+++ b/fs/xfs/libxfs/xfs_alloc.h
@@ -98,7 +98,7 @@ unsigned int xfs_alloc_min_freelist(struct xfs_mount *mp,
struct xfs_perag *pag);
/*
- * Compute and fill in value of m_ag_maxlevels.
+ * Compute and fill in value of m_alloc_maxlevels.
*/
void
xfs_alloc_compute_maxlevels(
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
index f14bad21503f..c3e262290f6f 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -316,7 +316,7 @@ xfs_allocbt_verify(
if (pag && pag->pagf_init) {
if (level >= pag->pagf_levels[btnum])
return __this_address;
- } else if (level >= mp->m_ag_maxlevels)
+ } else if (level >= mp->m_alloc_maxlevels)
return __this_address;
return xfs_btree_sblock_verify(bp, mp->m_alloc_mxr[level != 0]);
@@ -477,7 +477,7 @@ xfs_allocbt_init_common(
ASSERT(btnum == XFS_BTNUM_BNO || btnum == XFS_BTNUM_CNT);
- cur = xfs_btree_alloc_cursor(mp, tp, btnum, mp->m_ag_maxlevels);
+ cur = xfs_btree_alloc_cursor(mp, tp, btnum, mp->m_alloc_maxlevels);
cur->bc_ag.abt.active = false;
if (btnum == XFS_BTNUM_CNT) {
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index 5e300daa2559..c879e7754ee6 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -70,7 +70,7 @@ xfs_allocfree_log_count(
{
uint blocks;
- blocks = num_ops * 2 * (2 * mp->m_ag_maxlevels - 1);
+ blocks = num_ops * 2 * (2 * mp->m_alloc_maxlevels - 1);
if (xfs_has_rmapbt(mp))
blocks += num_ops * (2 * mp->m_rmap_maxlevels - 1);
if (xfs_has_reflink(mp))
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index 50332be34388..bd04cb836419 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -74,7 +74,7 @@
#define XFS_DIOSTRAT_SPACE_RES(mp, v) \
(XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK) + (v))
#define XFS_GROWFS_SPACE_RES(mp) \
- (2 * (mp)->m_ag_maxlevels)
+ (2 * (mp)->m_alloc_maxlevels)
#define XFS_GROWFSRT_SPACE_RES(mp,b) \
((b) + XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK))
#define XFS_LINK_SPACE_RES(mp,nl) \