[PATCH 1/4] xfs: move lru refs to the btree ops structure

Darrick J. Wong
2023-12-31T20:19:34Z

Move the btree buffer LRU refcount to the btree ops structure so that we
can eliminate the last bc_btnum switch in the generic btree code. We're
about to create repair-specific btree types, and we don't want that
stuff cluttering up libxfs.

Signed-off-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_alloc_btree.c | 2 ++
fs/xfs/libxfs/xfs_bmap_btree.c | 1 +
fs/xfs/libxfs/xfs_btree.c | 24 ++----------------------
fs/xfs/libxfs/xfs_btree.h | 3 +++
fs/xfs/libxfs/xfs_ialloc_btree.c | 2 ++
fs/xfs/libxfs/xfs_refcount_btree.c | 1 +
fs/xfs/libxfs/xfs_rmap_btree.c | 2 ++
7 files changed, 13 insertions(+), 22 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
index 08aa92f574334..fd769e62cc35b 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -457,6 +457,7 @@ xfs_allocbt_keys_contiguous(
const struct xfs_btree_ops xfs_bnobt_ops = {
.rec_len = sizeof(xfs_alloc_rec_t),
.key_len = sizeof(xfs_alloc_key_t),
+ .lru_refs = XFS_ALLOC_BTREE_REF,

.dup_cursor = xfs_allocbt_dup_cursor,
.set_root = xfs_allocbt_set_root,
@@ -480,6 +481,7 @@ const struct xfs_btree_ops xfs_bnobt_ops = {
const struct xfs_btree_ops xfs_cntbt_ops = {
.rec_len = sizeof(xfs_alloc_rec_t),
.key_len = sizeof(xfs_alloc_key_t),
+ .lru_refs = XFS_ALLOC_BTREE_REF,
.geom_flags = XFS_BTREE_LASTREC_UPDATE,

.dup_cursor = xfs_allocbt_dup_cursor,
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c
index 54e0a47169487..fd5fb8abf4448 100644
--- a/fs/xfs/libxfs/xfs_bmap_btree.c
+++ b/fs/xfs/libxfs/xfs_bmap_btree.c
@@ -516,6 +516,7 @@ xfs_bmbt_keys_contiguous(
const struct xfs_btree_ops xfs_bmbt_ops = {
.rec_len = sizeof(xfs_bmbt_rec_t),
.key_len = sizeof(xfs_bmbt_key_t),
+ .lru_refs = XFS_BMAP_BTREE_REF,
.geom_flags = XFS_BTREE_LONG_PTRS | XFS_BTREE_ROOT_IN_INODE,

.dup_cursor = xfs_bmbt_dup_cursor,
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index 5af19610d8919..4c8e9dd25b739 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -1350,32 +1350,12 @@ xfs_btree_buf_to_ptr(
}
}

-STATIC void
+static inline void
xfs_btree_set_refs(
struct xfs_btree_cur *cur,
struct xfs_buf *bp)
{
- switch (cur->bc_btnum) {
- case XFS_BTNUM_BNO:
- case XFS_BTNUM_CNT:
- xfs_buf_set_ref(bp, XFS_ALLOC_BTREE_REF);
- break;
- case XFS_BTNUM_INO:
- case XFS_BTNUM_FINO:
- xfs_buf_set_ref(bp, XFS_INO_BTREE_REF);
- break;
- case XFS_BTNUM_BMAP:
- xfs_buf_set_ref(bp, XFS_BMAP_BTREE_REF);
- break;
- case XFS_BTNUM_RMAP:
- xfs_buf_set_ref(bp, XFS_RMAP_BTREE_REF);
- break;
- case XFS_BTNUM_REFC:
- xfs_buf_set_ref(bp, XFS_REFC_BTREE_REF);
- break;
- default:
- ASSERT(0);
- }
+ xfs_buf_set_ref(bp, cur->bc_ops->lru_refs);
}

int
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index 41000bd6cccf7..edbcd4f0e9888 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -120,6 +120,9 @@ struct xfs_btree_ops {
/* XFS_BTREE_* flags that determine the geometry of the btree */
unsigned int geom_flags;

+ /* LRU refcount to set on each btree buffer created */
+ int lru_refs;
+
/* cursor operations */
struct xfs_btree_cur *(*dup_cursor)(struct xfs_btree_cur *);
void (*update_cursor)(struct xfs_btree_cur *src,
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c
index 69086fdc3be6f..cdb1f99970724 100644
--- a/fs/xfs/libxfs/xfs_ialloc_btree.c
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.c
@@ -401,6 +401,7 @@ xfs_inobt_keys_contiguous(
const struct xfs_btree_ops xfs_inobt_ops = {
.rec_len = sizeof(xfs_inobt_rec_t),
.key_len = sizeof(xfs_inobt_key_t),
+ .lru_refs = XFS_INO_BTREE_REF,

.dup_cursor = xfs_inobt_dup_cursor,
.set_root = xfs_inobt_set_root,
@@ -423,6 +424,7 @@ const struct xfs_btree_ops xfs_inobt_ops = {
const struct xfs_btree_ops xfs_finobt_ops = {
.rec_len = sizeof(xfs_inobt_rec_t),
.key_len = sizeof(xfs_inobt_key_t),
+ .lru_refs = XFS_INO_BTREE_REF,

.dup_cursor = xfs_inobt_dup_cursor,
.set_root = xfs_finobt_set_root,
diff --git a/fs/xfs/libxfs/xfs_refcount_btree.c b/fs/xfs/libxfs/xfs_refcount_btree.c
index 36e7b26d5e3b2..06a2f062b58cb 100644
--- a/fs/xfs/libxfs/xfs_refcount_btree.c
+++ b/fs/xfs/libxfs/xfs_refcount_btree.c
@@ -320,6 +320,7 @@ xfs_refcountbt_keys_contiguous(
const struct xfs_btree_ops xfs_refcountbt_ops = {
.rec_len = sizeof(struct xfs_refcount_rec),
.key_len = sizeof(struct xfs_refcount_key),
+ .lru_refs = XFS_REFC_BTREE_REF,

.dup_cursor = xfs_refcountbt_dup_cursor,
.set_root = xfs_refcountbt_set_root,
diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c
index b4a8b4b62456b..23841ee6e2ff6 100644
--- a/fs/xfs/libxfs/xfs_rmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rmap_btree.c
@@ -489,6 +489,7 @@ xfs_rmapbt_keys_contiguous(
const struct xfs_btree_ops xfs_rmapbt_ops = {
.rec_len = sizeof(struct xfs_rmap_rec),
.key_len = 2 * sizeof(struct xfs_rmap_key),
+ .lru_refs = XFS_RMAP_BTREE_REF,
.geom_flags = XFS_BTREE_CRC_BLOCKS | XFS_BTREE_OVERLAPPING,

.dup_cursor = xfs_rmapbt_dup_cursor,
@@ -613,6 +614,7 @@ static const struct xfs_buf_ops xfs_rmapbt_mem_buf_ops = {
static const struct xfs_btree_ops xfs_rmapbt_mem_ops = {
.rec_len = sizeof(struct xfs_rmap_rec),
.key_len = 2 * sizeof(struct xfs_rmap_key),
+ .lru_refs = XFS_RMAP_BTREE_REF,
.geom_flags = XFS_BTREE_CRC_BLOCKS | XFS_BTREE_OVERLAPPING |
XFS_BTREE_IN_XFILE,