On Thu, May 06, 2021 at 05:20:35PM +1000, Dave Chinner wrote:
> From: Dave Chinner <dchinner@xxxxxxxxxx>
>
> Move the xfs_perag infrastructure to the libxfs files that contain
> all the per AG infrastructure. This helps set up for passing perags
> around all the code instead of bare agnos with minimal extra
> includes for existing files.
>
> Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
> ---
> fs/xfs/libxfs/xfs_ag.c | 133 ++++++++++++++++++++++++++++++++++++
> fs/xfs/libxfs/xfs_ag.h | 98 +++++++++++++++++++++++++-
> fs/xfs/libxfs/xfs_ag_resv.h | 15 ++++
> fs/xfs/libxfs/xfs_btree.c | 1 +
> fs/xfs/xfs_mount.c | 131 -----------------------------------
> fs/xfs/xfs_mount.h | 111 +-----------------------------
> fs/xfs/xfs_trace.c | 2 +
> 7 files changed, 250 insertions(+), 241 deletions(-)
>
> diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c
> index 2ca31dc46fe8..14d8b866dc6d 100644
> --- a/fs/xfs/libxfs/xfs_ag.c
> +++ b/fs/xfs/libxfs/xfs_ag.c
> @@ -28,6 +28,9 @@
> #include "xfs_log_format.h"
> #include "xfs_trans.h"
> #include "xfs_trace.h"
> +#include "xfs_inode.h"
> +#include "xfs_icache.h"
> +
>
> /*
> * Passive reference counting access wrappers to the perag structures. If the
> @@ -163,6 +166,136 @@ xfs_initialize_perag_data(
> return error;
> }
>
> +STATIC void
> +__xfs_free_perag(
> + struct rcu_head *head)
> +{
> + struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
> +
> + ASSERT(!delayed_work_pending(&pag->pag_blockgc_work));
> + ASSERT(atomic_read(&pag->pag_ref) == 0);
> + kmem_free(pag);
> +}
> +
> +/*
> + * Free up the per-ag resources associated with the mount structure.
> + */
> +void
> +xfs_free_perag(
> + struct xfs_mount *mp)
> +{
> + struct xfs_perag *pag;
> + xfs_agnumber_t agno;
> +
> + for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
> + spin_lock(&mp->m_perag_lock);
> + pag = radix_tree_delete(&mp->m_perag_tree, agno);
> + spin_unlock(&mp->m_perag_lock);
> + ASSERT(pag);
> + ASSERT(atomic_read(&pag->pag_ref) == 0);
> +
> + cancel_delayed_work_sync(&pag->pag_blockgc_work);
> + xfs_iunlink_destroy(pag);
> + xfs_buf_hash_destroy(pag);
> +
> + call_rcu(&pag->rcu_head, __xfs_free_perag);
> + }
> +}
> +
> +int
> +xfs_initialize_perag(
> + struct xfs_mount *mp,
> + xfs_agnumber_t agcount,
> + xfs_agnumber_t *maxagi)
> +{
> + struct xfs_perag *pag;
> + xfs_agnumber_t index;
> + xfs_agnumber_t first_initialised = NULLAGNUMBER;
> + int error;
> +
> + /*
> + * Walk the current per-ag tree so we don't try to initialise AGs
> + * that already exist (growfs case). Allocate and insert all the
> + * AGs we don't find ready for initialisation.
> + */
> + for (index = 0; index < agcount; index++) {
> + pag = xfs_perag_get(mp, index);
> + if (pag) {
> + xfs_perag_put(pag);
> + continue;
> + }
> +
> + pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
> + if (!pag) {
> + error = -ENOMEM;
> + goto out_unwind_new_pags;
> + }
> + pag->pag_agno = index;
> + pag->pag_mount = mp;
> +
> + error = radix_tree_preload(GFP_NOFS);
> + if (error)
> + goto out_hash_destroy;
> +
> + spin_lock(&mp->m_perag_lock);
> + if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
> + WARN_ON_ONCE(1);
> + spin_unlock(&mp->m_perag_lock);
> + radix_tree_preload_end();
> + error = -EEXIST;
> + goto out_hash_destroy;
> + }
> + spin_unlock(&mp->m_perag_lock);
> + radix_tree_preload_end();
> +
> + spin_lock_init(&pag->pag_ici_lock);
> + spin_lock_init(&pag->pagb_lock);
> + spin_lock_init(&pag->pag_state_lock);
> + INIT_DELAYED_WORK(&pag->pag_blockgc_work, xfs_blockgc_worker);
> + INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
> + init_waitqueue_head(&pag->pagb_wait);
> + pag->pagb_count = 0;
> + pag->pagb_tree = RB_ROOT;
> +
> + error = xfs_buf_hash_init(pag);
> + if (error)
> + goto out_free_pag;
> +
> + error = xfs_iunlink_init(pag);
> + if (error)
> + goto out_hash_destroy;
> +
> + /* first new pag is fully initialized */
> + if (first_initialised == NULLAGNUMBER)
> + first_initialised = index;
> + }
> +
> + index = xfs_set_inode_alloc(mp, agcount);
> +
> + if (maxagi)
> + *maxagi = index;
> +
> + mp->m_ag_prealloc_blocks = xfs_prealloc_blocks(mp);
> + return 0;
> +
> +out_hash_destroy:
> + xfs_buf_hash_destroy(pag);
> +out_free_pag:
> + pag = radix_tree_delete(&mp->m_perag_tree, index);
> + kmem_free(pag);
> +out_unwind_new_pags:
> + /* unwind any prior newly initialized pags */
> + for (index = first_initialised; index < agcount; index++) {
> + pag = radix_tree_delete(&mp->m_perag_tree, index);
> + if (!pag)
> + break;
> + xfs_buf_hash_destroy(pag);
> + xfs_iunlink_destroy(pag);
> + kmem_free(pag);
> + }
> + return error;
> +}
> +
> static int
> xfs_get_aghdr_buf(
> struct xfs_mount *mp,
> diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h
> index cb1bd1c03cd7..ec37f9d9f310 100644
> --- a/fs/xfs/libxfs/xfs_ag.h
> +++ b/fs/xfs/libxfs/xfs_ag.h
> @@ -12,9 +12,103 @@ struct xfs_trans;
> struct xfs_perag;
>
> /*
> - * perag get/put wrappers for ref counting
> + * Per-ag infrastructure
> */
> -int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
> +
> +/* per-AG block reservation data structures*/
> +struct xfs_ag_resv {
> + /* number of blocks originally reserved here */
> + xfs_extlen_t ar_orig_reserved;
> + /* number of blocks reserved here */
> + xfs_extlen_t ar_reserved;
> + /* number of blocks originally asked for */
> + xfs_extlen_t ar_asked;
> +};
> +
> +/*
> + * Per-ag incore structure, copies of information in agf and agi, to improve the
> + * performance of allocation group selection.
> + */
> +typedef struct xfs_perag {
> + struct xfs_mount *pag_mount; /* owner filesystem */
> + xfs_agnumber_t pag_agno; /* AG this structure belongs to */
> + atomic_t pag_ref; /* perag reference count */
> + char pagf_init; /* this agf's entry is initialized */
> + char pagi_init; /* this agi's entry is initialized */
> + char pagf_metadata; /* the agf is preferred to be metadata */
> + char pagi_inodeok; /* The agi is ok for inodes */
> + uint8_t pagf_levels[XFS_BTNUM_AGF];
> + /* # of levels in bno & cnt btree */
> + bool pagf_agflreset; /* agfl requires reset before use */
> + uint32_t pagf_flcount; /* count of blocks in freelist */
> + xfs_extlen_t pagf_freeblks; /* total free blocks */
> + xfs_extlen_t pagf_longest; /* longest free space */
> + uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
> + xfs_agino_t pagi_freecount; /* number of free inodes */
> + xfs_agino_t pagi_count; /* number of allocated inodes */
> +
> + /*
> + * Inode allocation search lookup optimisation.
> + * If the pagino matches, the search for new inodes
> + * doesn't need to search the near ones again straight away
> + */
> + xfs_agino_t pagl_pagino;
> + xfs_agino_t pagl_leftrec;
> + xfs_agino_t pagl_rightrec;
> +
> + int pagb_count; /* pagb slots in use */
> + uint8_t pagf_refcount_level; /* recount btree height */
> +
> + /* Blocks reserved for all kinds of metadata. */
> + struct xfs_ag_resv pag_meta_resv;
> + /* Blocks reserved for the reverse mapping btree. */
> + struct xfs_ag_resv pag_rmapbt_resv;
> +
> + /* -- kernel only structures below this line -- */
> +
> + /*
> + * Bitsets of per-ag metadata that have been checked and/or are sick.
> + * Callers should hold pag_state_lock before accessing this field.
> + */
> + uint16_t pag_checked;
> + uint16_t pag_sick;
> + spinlock_t pag_state_lock;
> +
> + spinlock_t pagb_lock; /* lock for pagb_tree */
> + struct rb_root pagb_tree; /* ordered tree of busy extents */
> + unsigned int pagb_gen; /* generation count for pagb_tree */
> + wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
> +
> + atomic_t pagf_fstrms; /* # of filestreams active in this AG */
> +
> + spinlock_t pag_ici_lock; /* incore inode cache lock */
> + struct radix_tree_root pag_ici_root; /* incore inode cache root */
> + int pag_ici_reclaimable; /* reclaimable inodes */
> + unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
> +
> + /* buffer cache index */
> + spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
> + struct rhashtable pag_buf_hash;
> +
> + /* for rcu-safe freeing */
> + struct rcu_head rcu_head;
> +
> + /* background prealloc block trimming */
> + struct delayed_work pag_blockgc_work;
> +
> + /*
> + * Unlinked inode information. This incore information reflects
> + * data stored in the AGI, so callers must hold the AGI buffer lock
> + * or have some other means to control concurrency.
> + */
> + struct rhashtable pagi_unlinked_hash;
> +} xfs_perag_t;
I wonder, have you ported this to xfsprogs yet? How much of a mess is
this going to create for things like libxfs-diff?
(Also would be nice to kill off xfs_perag_t, but maybe you did that at
the end of the series already <shrug>)
--D
> +
> +int xfs_initialize_perag(struct xfs_mount *mp, xfs_agnumber_t agcount,
> + xfs_agnumber_t *maxagi);
> +int xfs_initialize_perag_data(struct xfs_mount *, xfs_agnumber_t);
> +void xfs_free_perag(struct xfs_mount *mp);
> +
> struct xfs_perag *xfs_perag_get(struct xfs_mount *, xfs_agnumber_t);
> struct xfs_perag *xfs_perag_get_tag(struct xfs_mount *, xfs_agnumber_t,
> int tag);
> diff --git a/fs/xfs/libxfs/xfs_ag_resv.h b/fs/xfs/libxfs/xfs_ag_resv.h
> index 8a8eb4bc48bb..b74b210008ea 100644
> --- a/fs/xfs/libxfs/xfs_ag_resv.h
> +++ b/fs/xfs/libxfs/xfs_ag_resv.h
> @@ -18,6 +18,21 @@ void xfs_ag_resv_alloc_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
> void xfs_ag_resv_free_extent(struct xfs_perag *pag, enum xfs_ag_resv_type type,
> struct xfs_trans *tp, xfs_extlen_t len);
>
> +static inline struct xfs_ag_resv *
> +xfs_perag_resv(
> + struct xfs_perag *pag,
> + enum xfs_ag_resv_type type)
> +{
> + switch (type) {
> + case XFS_AG_RESV_METADATA:
> + return &pag->pag_meta_resv;
> + case XFS_AG_RESV_RMAPBT:
> + return &pag->pag_rmapbt_resv;
> + default:
> + return NULL;
> + }
> +}
> +
> /*
> * RMAPBT reservation accounting wrappers. Since rmapbt blocks are sourced from
> * the AGFL, they are allocated one at a time and the reservation updates don't
> diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
> index 5b6fcb9b44e2..0f12b885600d 100644
> --- a/fs/xfs/libxfs/xfs_btree.c
> +++ b/fs/xfs/libxfs/xfs_btree.c
> @@ -21,6 +21,7 @@
> #include "xfs_alloc.h"
> #include "xfs_log.h"
> #include "xfs_btree_staging.h"
> +#include "xfs_ag.h"
>
> /*
> * Cursor allocation zone.
> diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
> index 2e6d42014346..c3a96fb3ad80 100644
> --- a/fs/xfs/xfs_mount.c
> +++ b/fs/xfs/xfs_mount.c
> @@ -120,43 +120,6 @@ xfs_uuid_unmount(
> mutex_unlock(&xfs_uuid_table_mutex);
> }
>
> -
> -STATIC void
> -__xfs_free_perag(
> - struct rcu_head *head)
> -{
> - struct xfs_perag *pag = container_of(head, struct xfs_perag, rcu_head);
> -
> - ASSERT(!delayed_work_pending(&pag->pag_blockgc_work));
> - ASSERT(atomic_read(&pag->pag_ref) == 0);
> - kmem_free(pag);
> -}
> -
> -/*
> - * Free up the per-ag resources associated with the mount structure.
> - */
> -STATIC void
> -xfs_free_perag(
> - xfs_mount_t *mp)
> -{
> - xfs_agnumber_t agno;
> - struct xfs_perag *pag;
> -
> - for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
> - spin_lock(&mp->m_perag_lock);
> - pag = radix_tree_delete(&mp->m_perag_tree, agno);
> - spin_unlock(&mp->m_perag_lock);
> - ASSERT(pag);
> - ASSERT(atomic_read(&pag->pag_ref) == 0);
> -
> - cancel_delayed_work_sync(&pag->pag_blockgc_work);
> - xfs_iunlink_destroy(pag);
> - xfs_buf_hash_destroy(pag);
> -
> - call_rcu(&pag->rcu_head, __xfs_free_perag);
> - }
> -}
> -
> /*
> * Check size of device based on the (data/realtime) block count.
> * Note: this check is used by the growfs code as well as mount.
> @@ -175,100 +138,6 @@ xfs_sb_validate_fsb_count(
> return 0;
> }
>
> -int
> -xfs_initialize_perag(
> - struct xfs_mount *mp,
> - xfs_agnumber_t agcount,
> - xfs_agnumber_t *maxagi)
> -{
> - struct xfs_perag *pag;
> - xfs_agnumber_t index;
> - xfs_agnumber_t first_initialised = NULLAGNUMBER;
> - int error;
> -
> - /*
> - * Walk the current per-ag tree so we don't try to initialise AGs
> - * that already exist (growfs case). Allocate and insert all the
> - * AGs we don't find ready for initialisation.
> - */
> - for (index = 0; index < agcount; index++) {
> - pag = xfs_perag_get(mp, index);
> - if (pag) {
> - xfs_perag_put(pag);
> - continue;
> - }
> -
> - pag = kmem_zalloc(sizeof(*pag), KM_MAYFAIL);
> - if (!pag) {
> - error = -ENOMEM;
> - goto out_unwind_new_pags;
> - }
> - pag->pag_agno = index;
> - pag->pag_mount = mp;
> -
> - error = radix_tree_preload(GFP_NOFS);
> - if (error)
> - goto out_hash_destroy;
> -
> - spin_lock(&mp->m_perag_lock);
> - if (radix_tree_insert(&mp->m_perag_tree, index, pag)) {
> - WARN_ON_ONCE(1);
> - spin_unlock(&mp->m_perag_lock);
> - radix_tree_preload_end();
> - error = -EEXIST;
> - goto out_hash_destroy;
> - }
> - spin_unlock(&mp->m_perag_lock);
> - radix_tree_preload_end();
> -
> - spin_lock_init(&pag->pag_ici_lock);
> - spin_lock_init(&pag->pagb_lock);
> - spin_lock_init(&pag->pag_state_lock);
> - INIT_DELAYED_WORK(&pag->pag_blockgc_work, xfs_blockgc_worker);
> - INIT_RADIX_TREE(&pag->pag_ici_root, GFP_ATOMIC);
> - init_waitqueue_head(&pag->pagb_wait);
> - pag->pagb_count = 0;
> - pag->pagb_tree = RB_ROOT;
> -
> - error = xfs_buf_hash_init(pag);
> - if (error)
> - goto out_free_pag;
> -
> - error = xfs_iunlink_init(pag);
> - if (error)
> - goto out_hash_destroy;
> -
> - /* first new pag is fully initialized */
> - if (first_initialised == NULLAGNUMBER)
> - first_initialised = index;
> - }
> -
> - index = xfs_set_inode_alloc(mp, agcount);
> -
> - if (maxagi)
> - *maxagi = index;
> -
> - mp->m_ag_prealloc_blocks = xfs_prealloc_blocks(mp);
> - return 0;
> -
> -out_hash_destroy:
> - xfs_buf_hash_destroy(pag);
> -out_free_pag:
> - pag = radix_tree_delete(&mp->m_perag_tree, index);
> - kmem_free(pag);
> -out_unwind_new_pags:
> - /* unwind any prior newly initialized pags */
> - for (index = first_initialised; index < agcount; index++) {
> - pag = radix_tree_delete(&mp->m_perag_tree, index);
> - if (!pag)
> - break;
> - xfs_buf_hash_destroy(pag);
> - xfs_iunlink_destroy(pag);
> - kmem_free(pag);
> - }
> - return error;
> -}
> -
> /*
> * xfs_readsb
> *
> diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
> index 6e534be5eea8..c78b63fe779a 100644
> --- a/fs/xfs/xfs_mount.h
> +++ b/fs/xfs/xfs_mount.h
> @@ -12,6 +12,7 @@ struct xfs_mru_cache;
> struct xfs_ail;
> struct xfs_quotainfo;
> struct xfs_da_geometry;
> +struct xfs_perag;
>
> /* dynamic preallocation free space thresholds, 5% down to 1% */
> enum {
> @@ -297,118 +298,12 @@ xfs_daddr_to_agbno(struct xfs_mount *mp, xfs_daddr_t d)
> return (xfs_agblock_t) do_div(ld, mp->m_sb.sb_agblocks);
> }
>
> -/* per-AG block reservation data structures*/
> -struct xfs_ag_resv {
> - /* number of blocks originally reserved here */
> - xfs_extlen_t ar_orig_reserved;
> - /* number of blocks reserved here */
> - xfs_extlen_t ar_reserved;
> - /* number of blocks originally asked for */
> - xfs_extlen_t ar_asked;
> -};
> -
> -/*
> - * Per-ag incore structure, copies of information in agf and agi, to improve the
> - * performance of allocation group selection.
> - */
> -typedef struct xfs_perag {
> - struct xfs_mount *pag_mount; /* owner filesystem */
> - xfs_agnumber_t pag_agno; /* AG this structure belongs to */
> - atomic_t pag_ref; /* perag reference count */
> - char pagf_init; /* this agf's entry is initialized */
> - char pagi_init; /* this agi's entry is initialized */
> - char pagf_metadata; /* the agf is preferred to be metadata */
> - char pagi_inodeok; /* The agi is ok for inodes */
> - uint8_t pagf_levels[XFS_BTNUM_AGF];
> - /* # of levels in bno & cnt btree */
> - bool pagf_agflreset; /* agfl requires reset before use */
> - uint32_t pagf_flcount; /* count of blocks in freelist */
> - xfs_extlen_t pagf_freeblks; /* total free blocks */
> - xfs_extlen_t pagf_longest; /* longest free space */
> - uint32_t pagf_btreeblks; /* # of blocks held in AGF btrees */
> - xfs_agino_t pagi_freecount; /* number of free inodes */
> - xfs_agino_t pagi_count; /* number of allocated inodes */
> -
> - /*
> - * Inode allocation search lookup optimisation.
> - * If the pagino matches, the search for new inodes
> - * doesn't need to search the near ones again straight away
> - */
> - xfs_agino_t pagl_pagino;
> - xfs_agino_t pagl_leftrec;
> - xfs_agino_t pagl_rightrec;
> -
> - int pagb_count; /* pagb slots in use */
> - uint8_t pagf_refcount_level; /* recount btree height */
> -
> - /* Blocks reserved for all kinds of metadata. */
> - struct xfs_ag_resv pag_meta_resv;
> - /* Blocks reserved for the reverse mapping btree. */
> - struct xfs_ag_resv pag_rmapbt_resv;
> -
> - /* -- kernel only structures below this line -- */
> -
> - /*
> - * Bitsets of per-ag metadata that have been checked and/or are sick.
> - * Callers should hold pag_state_lock before accessing this field.
> - */
> - uint16_t pag_checked;
> - uint16_t pag_sick;
> - spinlock_t pag_state_lock;
> -
> - spinlock_t pagb_lock; /* lock for pagb_tree */
> - struct rb_root pagb_tree; /* ordered tree of busy extents */
> - unsigned int pagb_gen; /* generation count for pagb_tree */
> - wait_queue_head_t pagb_wait; /* woken when pagb_gen changes */
> -
> - atomic_t pagf_fstrms; /* # of filestreams active in this AG */
> -
> - spinlock_t pag_ici_lock; /* incore inode cache lock */
> - struct radix_tree_root pag_ici_root; /* incore inode cache root */
> - int pag_ici_reclaimable; /* reclaimable inodes */
> - unsigned long pag_ici_reclaim_cursor; /* reclaim restart point */
> -
> - /* buffer cache index */
> - spinlock_t pag_buf_lock; /* lock for pag_buf_hash */
> - struct rhashtable pag_buf_hash;
> -
> - /* for rcu-safe freeing */
> - struct rcu_head rcu_head;
> -
> - /* background prealloc block trimming */
> - struct delayed_work pag_blockgc_work;
> -
> - /*
> - * Unlinked inode information. This incore information reflects
> - * data stored in the AGI, so callers must hold the AGI buffer lock
> - * or have some other means to control concurrency.
> - */
> - struct rhashtable pagi_unlinked_hash;
> -} xfs_perag_t;
> -
> -static inline struct xfs_ag_resv *
> -xfs_perag_resv(
> - struct xfs_perag *pag,
> - enum xfs_ag_resv_type type)
> -{
> - switch (type) {
> - case XFS_AG_RESV_METADATA:
> - return &pag->pag_meta_resv;
> - case XFS_AG_RESV_RMAPBT:
> - return &pag->pag_rmapbt_resv;
> - default:
> - return NULL;
> - }
> -}
> -
> -int xfs_buf_hash_init(xfs_perag_t *pag);
> -void xfs_buf_hash_destroy(xfs_perag_t *pag);
> +int xfs_buf_hash_init(struct xfs_perag *pag);
> +void xfs_buf_hash_destroy(struct xfs_perag *pag);
>
> extern void xfs_uuid_table_free(void);
> extern uint64_t xfs_default_resblks(xfs_mount_t *mp);
> extern int xfs_mountfs(xfs_mount_t *mp);
> -extern int xfs_initialize_perag(xfs_mount_t *mp, xfs_agnumber_t agcount,
> - xfs_agnumber_t *maxagi);
> extern void xfs_unmountfs(xfs_mount_t *);
>
> extern int xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
> diff --git a/fs/xfs/xfs_trace.c b/fs/xfs/xfs_trace.c
> index 9b8d703dc9fd..7e01e00550ac 100644
> --- a/fs/xfs/xfs_trace.c
> +++ b/fs/xfs/xfs_trace.c
> @@ -30,6 +30,8 @@
> #include "xfs_fsmap.h"
> #include "xfs_btree_staging.h"
> #include "xfs_icache.h"
> +#include "xfs_ag.h"
> +#include "xfs_ag_resv.h"
>
> /*
> * We include this last to have the helpers above available for the trace
> --
> 2.31.1
>
