[PATCH 08/23] xfs: pass perags through to the busy extent code

Dave Chinner
2021-05-19T01:21:09Z

All of the callers of the busy extent API either have perag
references available to use so we can pass a perag to the busy
extent functions rather than having them have to do unnecessary
lookups.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
---
fs/xfs/libxfs/xfs_alloc.c | 37 +++++++++++++++++----------------
fs/xfs/libxfs/xfs_alloc.h | 2 +-
fs/xfs/libxfs/xfs_alloc_btree.c | 5 ++---
fs/xfs/libxfs/xfs_rmap.c | 32 ++++++++++++++++------------
fs/xfs/libxfs/xfs_rmap_btree.c | 7 +++----
fs/xfs/scrub/repair.c | 4 ++--
fs/xfs/xfs_discard.c | 2 +-
fs/xfs/xfs_extent_busy.c | 24 ++++++---------------
fs/xfs/xfs_extent_busy.h | 7 ++++---
9 files changed, 57 insertions(+), 63 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index dc2b77829915..ce31c00dbf6f 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -1063,7 +1063,7 @@ xfs_alloc_ag_vextent_small(
if (fbno == NULLAGBLOCK)
goto out;

- xfs_extent_busy_reuse(args->mp, args->agno, fbno, 1,
+ xfs_extent_busy_reuse(args->mp, args->pag, fbno, 1,
(args->datatype & XFS_ALLOC_NOBUSY));

if (args->datatype & XFS_ALLOC_USERDATA) {
@@ -1178,7 +1178,7 @@ xfs_alloc_ag_vextent(
if (error)
return error;

- ASSERT(!xfs_extent_busy_search(args->mp, args->agno,
+ ASSERT(!xfs_extent_busy_search(args->mp, args->pag,
args->agbno, args->len));
}

@@ -3292,7 +3292,7 @@ xfs_alloc_vextent(
int
xfs_free_extent_fix_freelist(
struct xfs_trans *tp,
- xfs_agnumber_t agno,
+ struct xfs_perag *pag,
struct xfs_buf **agbp)
{
struct xfs_alloc_arg args;
@@ -3301,7 +3301,8 @@ xfs_free_extent_fix_freelist(
memset(&args, 0, sizeof(struct xfs_alloc_arg));
args.tp = tp;
args.mp = tp->t_mountp;
- args.agno = agno;
+ args.agno = pag->pag_agno;
+ args.pag = pag;

/*
* validate that the block number is legal - the enables us to detect
@@ -3310,17 +3311,12 @@ xfs_free_extent_fix_freelist(
if (args.agno >= args.mp->m_sb.sb_agcount)
return -EFSCORRUPTED;

- args.pag = xfs_perag_get(args.mp, args.agno);
- ASSERT(args.pag);
-
error = xfs_alloc_fix_freelist(&args, XFS_ALLOC_FLAG_FREEING);
if (error)
- goto out;
+ return error;

*agbp = args.agbp;
-out:
- xfs_perag_put(args.pag);
- return error;
+ return 0;
}

/*
@@ -3344,6 +3340,7 @@ __xfs_free_extent(
struct xfs_agf *agf;
int error;
unsigned int busy_flags = 0;
+ struct xfs_perag *pag;

ASSERT(len != 0);
ASSERT(type != XFS_AG_RESV_AGFL);
@@ -3352,33 +3349,37 @@ __xfs_free_extent(
XFS_ERRTAG_FREE_EXTENT))
return -EIO;

- error = xfs_free_extent_fix_freelist(tp, agno, &agbp);
+ pag = xfs_perag_get(mp, agno);
+ error = xfs_free_extent_fix_freelist(tp, pag, &agbp);
if (error)
- return error;
+ goto err;
agf = agbp->b_addr;

if (XFS_IS_CORRUPT(mp, agbno >= mp->m_sb.sb_agblocks)) {
error = -EFSCORRUPTED;
- goto err;
+ goto err_release;
}

/* validate the extent size is legal now we have the agf locked */
if (XFS_IS_CORRUPT(mp, agbno + len > be32_to_cpu(agf->agf_length))) {
error = -EFSCORRUPTED;
- goto err;
+ goto err_release;
}

error = xfs_free_ag_extent(tp, agbp, agno, agbno, len, oinfo, type);
if (error)
- goto err;
+ goto err_release;

if (skip_discard)
busy_flags |= XFS_EXTENT_BUSY_SKIP_DISCARD;
- xfs_extent_busy_insert(tp, agno, agbno, len, busy_flags);
+ xfs_extent_busy_insert(tp, pag, agbno, len, busy_flags);
+ xfs_perag_put(pag);
return 0;

-err:
+err_release:
xfs_trans_brelse(tp, agbp);
+err:
+ xfs_perag_put(pag);
return error;
}

diff --git a/fs/xfs/libxfs/xfs_alloc.h b/fs/xfs/libxfs/xfs_alloc.h
index a4427c5775c2..e30900b6f8ba 100644
--- a/fs/xfs/libxfs/xfs_alloc.h
+++ b/fs/xfs/libxfs/xfs_alloc.h
@@ -214,7 +214,7 @@ int xfs_alloc_read_agfl(struct xfs_mount *mp, struct xfs_trans *tp,
int xfs_free_agfl_block(struct xfs_trans *, xfs_agnumber_t, xfs_agblock_t,
struct xfs_buf *, struct xfs_owner_info *);
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,
+int xfs_free_extent_fix_freelist(struct xfs_trans *tp, struct xfs_perag *pag,
struct xfs_buf **agbp);

xfs_extlen_t xfs_prealloc_blocks(struct xfs_mount *mp);
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
index a540b6e799e0..19fdf87e86b9 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -72,7 +72,7 @@ xfs_allocbt_alloc_block(
}

atomic64_inc(&cur->bc_mp->m_allocbt_blks);
- xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agno, bno, 1, false);
+ xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agbp->b_pag, bno, 1, false);

new->s = cpu_to_be32(bno);

@@ -86,7 +86,6 @@ xfs_allocbt_free_block(
struct xfs_buf *bp)
{
struct xfs_buf *agbp = cur->bc_ag.agbp;
- struct xfs_agf *agf = agbp->b_addr;
xfs_agblock_t bno;
int error;

@@ -96,7 +95,7 @@ xfs_allocbt_free_block(
return error;

atomic64_dec(&cur->bc_mp->m_allocbt_blks);
- xfs_extent_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1,
+ xfs_extent_busy_insert(cur->bc_tp, agbp->b_pag, bno, 1,
XFS_EXTENT_BUSY_SKIP_DISCARD);
return 0;
}
diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c
index 61e8f10436ac..1d0a6b686eea 100644
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -11,6 +11,7 @@
#include "xfs_trans_resv.h"
#include "xfs_bit.h"
#include "xfs_mount.h"
+#include "xfs_sb.h"
#include "xfs_defer.h"
#include "xfs_btree.h"
#include "xfs_trans.h"
@@ -2363,31 +2364,32 @@ xfs_rmap_finish_one(
struct xfs_btree_cur **pcur)
{
struct xfs_mount *mp = tp->t_mountp;
+ struct xfs_perag *pag;
struct xfs_btree_cur *rcur;
struct xfs_buf *agbp = NULL;
int error = 0;
- xfs_agnumber_t agno;
struct xfs_owner_info oinfo;
xfs_agblock_t bno;
bool unwritten;

- agno = XFS_FSB_TO_AGNO(mp, startblock);
- ASSERT(agno != NULLAGNUMBER);
+ pag = xfs_perag_get(mp, XFS_FSB_TO_AGNO(mp, startblock));
bno = XFS_FSB_TO_AGBNO(mp, startblock);

- trace_xfs_rmap_deferred(mp, agno, type, bno, owner, whichfork,
+ trace_xfs_rmap_deferred(mp, pag->pag_agno, type, bno, owner, whichfork,
startoff, blockcount, state);

- if (XFS_TEST_ERROR(false, mp,
- XFS_ERRTAG_RMAP_FINISH_ONE))
- return -EIO;
+ if (XFS_TEST_ERROR(false, mp, XFS_ERRTAG_RMAP_FINISH_ONE)) {
+ error = -EIO;
+ goto out_drop;
+ }
+

/*
* If we haven't gotten a cursor or the cursor AG doesn't match
* the startblock, get one now.
*/
rcur = *pcur;
- if (rcur != NULL && rcur->bc_ag.agno != agno) {
+ if (rcur != NULL && rcur->bc_ag.agno != pag->pag_agno) {
xfs_rmap_finish_one_cleanup(tp, rcur, 0);
rcur = NULL;
*pcur = NULL;
@@ -2398,13 +2400,15 @@ xfs_rmap_finish_one(
* rmapbt, because a shape change could cause us to
* allocate blocks.
*/
- error = xfs_free_extent_fix_freelist(tp, agno, &agbp);
+ error = xfs_free_extent_fix_freelist(tp, pag, &agbp);
if (error)
- return error;
- if (XFS_IS_CORRUPT(tp->t_mountp, !agbp))
- return -EFSCORRUPTED;
+ goto out_drop;
+ if (XFS_IS_CORRUPT(tp->t_mountp, !agbp)) {
+ error = -EFSCORRUPTED;
+ goto out_drop;
+ }

- rcur = xfs_rmapbt_init_cursor(mp, tp, agbp, agno);
+ rcur = xfs_rmapbt_init_cursor(mp, tp, agbp, pag->pag_agno);
}
*pcur = rcur;

@@ -2442,6 +2446,8 @@ xfs_rmap_finish_one(
ASSERT(0);
error = -EFSCORRUPTED;
}
+out_drop:
+ xfs_perag_put(pag);
return error;
}

diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c
index f1fee42dda2d..46a5295ecf35 100644
--- a/fs/xfs/libxfs/xfs_rmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rmap_btree.c
@@ -100,8 +100,7 @@ xfs_rmapbt_alloc_block(
return 0;
}

- xfs_extent_busy_reuse(cur->bc_mp, cur->bc_ag.agno, bno, 1,
- false);
+ xfs_extent_busy_reuse(cur->bc_mp, agbp->b_pag, bno, 1, false);

new->s = cpu_to_be32(bno);
be32_add_cpu(&agf->agf_rmap_blocks, 1);
@@ -133,10 +132,10 @@ xfs_rmapbt_free_block(
if (error)
return error;

- xfs_extent_busy_insert(cur->bc_tp, be32_to_cpu(agf->agf_seqno), bno, 1,
+ pag = cur->bc_ag.agbp->b_pag;
+ xfs_extent_busy_insert(cur->bc_tp, pag, bno, 1,
XFS_EXTENT_BUSY_SKIP_DISCARD);

- pag = cur->bc_ag.agbp->b_pag;
xfs_ag_resv_free_extent(pag, XFS_AG_RESV_RMAPBT, NULL, 1);
return 0;
}
diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
index 1308b62a8170..6b62872c4d10 100644
--- a/fs/xfs/scrub/repair.c
+++ b/fs/xfs/scrub/repair.c
@@ -304,7 +304,7 @@ xrep_alloc_ag_block(
return error;
if (bno == NULLAGBLOCK)
return -ENOSPC;
- xfs_extent_busy_reuse(sc->mp, sc->sa.agno, bno,
+ xfs_extent_busy_reuse(sc->mp, sc->sa.pag, bno,
1, false);
*fsbno = XFS_AGB_TO_FSB(sc->mp, sc->sa.agno, bno);
if (resv == XFS_AG_RESV_RMAPBT)
@@ -519,7 +519,7 @@ xrep_put_freelist(
agbno, 0);
if (error)
return error;
- xfs_extent_busy_insert(sc->tp, sc->sa.agno, agbno, 1,
+ xfs_extent_busy_insert(sc->tp, sc->sa.pag, agbno, 1,
XFS_EXTENT_BUSY_SKIP_DISCARD);

return 0;
diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 3bf6dba1a040..972864250bd2 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -108,7 +108,7 @@ xfs_trim_extents(
* If any blocks in the range are still busy, skip the
* discard and try again the next time.
*/
- if (xfs_extent_busy_search(mp, agno, fbno, flen)) {
+ if (xfs_extent_busy_search(mp, pag, fbno, flen)) {
trace_xfs_discard_busy(mp, agno, fbno, flen);
goto next_extent;
}
diff --git a/fs/xfs/xfs_extent_busy.c b/fs/xfs/xfs_extent_busy.c
index 422667e0668b..ad22a003f959 100644
--- a/fs/xfs/xfs_extent_busy.c
+++ b/fs/xfs/xfs_extent_busy.c
@@ -22,28 +22,26 @@
void
xfs_extent_busy_insert(
struct xfs_trans *tp,
- xfs_agnumber_t agno,
+ struct xfs_perag *pag,
xfs_agblock_t bno,
xfs_extlen_t len,
unsigned int flags)
{
struct xfs_extent_busy *new;
struct xfs_extent_busy *busyp;
- struct xfs_perag *pag;
struct rb_node **rbp;
struct rb_node *parent = NULL;

new = kmem_zalloc(sizeof(struct xfs_extent_busy), 0);
- new->agno = agno;
+ new->agno = pag->pag_agno;
new->bno = bno;
new->length = len;
INIT_LIST_HEAD(&new->list);
new->flags = flags;

/* trace before insert to be able to see failed inserts */
- trace_xfs_extent_busy(tp->t_mountp, agno, bno, len);
+ trace_xfs_extent_busy(tp->t_mountp, pag->pag_agno, bno, len);

- pag = xfs_perag_get(tp->t_mountp, new->agno);
spin_lock(&pag->pagb_lock);
rbp = &pag->pagb_tree.rb_node;
while (*rbp) {
@@ -66,7 +64,6 @@ xfs_extent_busy_insert(

list_add(&new->list, &tp->t_busy);
spin_unlock(&pag->pagb_lock);
- xfs_perag_put(pag);
}

/*
@@ -81,21 +78,17 @@ xfs_extent_busy_insert(
int
xfs_extent_busy_search(
struct xfs_mount *mp,
- xfs_agnumber_t agno,
+ struct xfs_perag *pag,
xfs_agblock_t bno,
xfs_extlen_t len)
{
- struct xfs_perag *pag;
struct rb_node *rbp;
struct xfs_extent_busy *busyp;
int match = 0;

- pag = xfs_perag_get(mp, agno);
+ /* find closest start bno overlap */
spin_lock(&pag->pagb_lock);
-
rbp = pag->pagb_tree.rb_node;
-
- /* find closest start bno overlap */
while (rbp) {
busyp = rb_entry(rbp, struct xfs_extent_busy, rb_node);
if (bno < busyp->bno) {
@@ -115,7 +108,6 @@ xfs_extent_busy_search(
}
}
spin_unlock(&pag->pagb_lock);
- xfs_perag_put(pag);
return match;
}

@@ -281,17 +273,14 @@ xfs_extent_busy_update_extent(
void
xfs_extent_busy_reuse(
struct xfs_mount *mp,
- xfs_agnumber_t agno,
+ struct xfs_perag *pag,
xfs_agblock_t fbno,
xfs_extlen_t flen,
bool userdata)
{
- struct xfs_perag *pag;
struct rb_node *rbp;

ASSERT(flen > 0);
-
- pag = xfs_perag_get(mp, agno);
spin_lock(&pag->pagb_lock);
restart:
rbp = pag->pagb_tree.rb_node;
@@ -314,7 +303,6 @@ xfs_extent_busy_reuse(
goto restart;
}
spin_unlock(&pag->pagb_lock);
- xfs_perag_put(pag);
}

/*
diff --git a/fs/xfs/xfs_extent_busy.h b/fs/xfs/xfs_extent_busy.h
index 8aea07100092..4a118131059f 100644
--- a/fs/xfs/xfs_extent_busy.h
+++ b/fs/xfs/xfs_extent_busy.h
@@ -9,6 +9,7 @@
#define __XFS_EXTENT_BUSY_H__

struct xfs_mount;
+struct xfs_perag;
struct xfs_trans;
struct xfs_alloc_arg;

@@ -31,7 +32,7 @@ struct xfs_extent_busy {
};

void
-xfs_extent_busy_insert(struct xfs_trans *tp, xfs_agnumber_t agno,
+xfs_extent_busy_insert(struct xfs_trans *tp, struct xfs_perag *pag,
xfs_agblock_t bno, xfs_extlen_t len, unsigned int flags);

void
@@ -39,11 +40,11 @@ xfs_extent_busy_clear(struct xfs_mount *mp, struct list_head *list,
bool do_discard);

int
-xfs_extent_busy_search(struct xfs_mount *mp, xfs_agnumber_t agno,
+xfs_extent_busy_search(struct xfs_mount *mp, struct xfs_perag *pag,
xfs_agblock_t bno, xfs_extlen_t len);

void
-xfs_extent_busy_reuse(struct xfs_mount *mp, xfs_agnumber_t agno,
+xfs_extent_busy_reuse(struct xfs_mount *mp, struct xfs_perag *pag,
xfs_agblock_t fbno, xfs_extlen_t flen, bool userdata);

bool
--
2.31.1