[PATCH 18/50] xfs: use active perag references for inode allocation

Dave Chinner
2022-06-11T01:27:20Z

Convert the inode allocation routines to use active perag references
or references held by callers rather than grab their own. Also drive
the perag further inwards to replace xfs_mounts when doing
operations on a specific AG.

Signed-off-by: Dave Chinner <dchinner@redhat.com>
---
fs/xfs/libxfs/xfs_ag.c | 2 +-
fs/xfs/libxfs/xfs_ialloc.c | 63 +++++++++++++++++++-------------------
fs/xfs/libxfs/xfs_ialloc.h | 2 +-
3 files changed, 33 insertions(+), 34 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c
index 1fc73ac55250..89b053c668e9 100644
--- a/fs/xfs/libxfs/xfs_ag.c
+++ b/fs/xfs/libxfs/xfs_ag.c
@@ -933,7 +933,7 @@ xfs_ag_shrink_space(
* Make sure that the last inode cluster cannot overlap with the new
* end of the AG, even if it's sparse.
*/
- error = xfs_ialloc_check_shrink(*tpp, pag->pag_agno, agibp, aglen - delta);
+ error = xfs_ialloc_check_shrink(pag, *tpp, agibp, aglen - delta);
if (error)
return error;

diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index 5782aa74c688..314750fbd170 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -169,14 +169,14 @@ xfs_inobt_insert_rec(
*/
STATIC int
xfs_inobt_insert(
- struct xfs_mount *mp,
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
xfs_agino_t newino,
xfs_agino_t newlen,
xfs_btnum_t btnum)
{
+ struct xfs_mount *mp = pag->pag_mount;
struct xfs_btree_cur *cur;
xfs_agino_t thisino;
int i;
@@ -514,14 +514,14 @@ __xfs_inobt_rec_merge(
*/
STATIC int
xfs_inobt_insert_sprec(
- struct xfs_mount *mp,
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
int btnum,
struct xfs_inobt_rec_incore *nrec, /* in/out: new/merged rec. */
bool merge) /* merge or replace */
{
+ struct xfs_mount *mp = pag->pag_mount;
struct xfs_btree_cur *cur;
int error;
int i;
@@ -609,9 +609,9 @@ xfs_inobt_insert_sprec(
*/
STATIC int
xfs_ialloc_ag_alloc(
+ struct xfs_perag *pag,
struct xfs_trans *tp,
- struct xfs_buf *agbp,
- struct xfs_perag *pag)
+ struct xfs_buf *agbp)
{
struct xfs_agi *agi;
struct xfs_alloc_arg args;
@@ -831,7 +831,7 @@ xfs_ialloc_ag_alloc(
* if necessary. If a merge does occur, rec is updated to the
* merged record.
*/
- error = xfs_inobt_insert_sprec(args.mp, tp, agbp, pag,
+ error = xfs_inobt_insert_sprec(pag, tp, agbp,
XFS_BTNUM_INO, &rec, true);
if (error == -EFSCORRUPTED) {
xfs_alert(args.mp,
@@ -856,20 +856,20 @@ xfs_ialloc_ag_alloc(
* existing record with this one.
*/
if (xfs_has_finobt(args.mp)) {
- error = xfs_inobt_insert_sprec(args.mp, tp, agbp, pag,
+ error = xfs_inobt_insert_sprec(pag, tp, agbp,
XFS_BTNUM_FINO, &rec, false);
if (error)
return error;
}
} else {
/* full chunk - insert new records to both btrees */
- error = xfs_inobt_insert(args.mp, tp, agbp, pag, newino, newlen,
+ error = xfs_inobt_insert(pag, tp, agbp, newino, newlen,
XFS_BTNUM_INO);
if (error)
return error;

if (xfs_has_finobt(args.mp)) {
- error = xfs_inobt_insert(args.mp, tp, agbp, pag, newino,
+ error = xfs_inobt_insert(pag, tp, agbp, newino,
newlen, XFS_BTNUM_FINO);
if (error)
return error;
@@ -981,9 +981,9 @@ xfs_inobt_first_free_inode(
*/
STATIC int
xfs_dialloc_ag_inobt(
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
xfs_ino_t parent,
xfs_ino_t *inop)
{
@@ -1429,9 +1429,9 @@ xfs_dialloc_ag_update_inobt(
*/
static int
xfs_dialloc_ag(
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
xfs_ino_t parent,
xfs_ino_t *inop)
{
@@ -1448,7 +1448,7 @@ xfs_dialloc_ag(
int i;

if (!xfs_has_finobt(mp))
- return xfs_dialloc_ag_inobt(tp, agbp, pag, parent, inop);
+ return xfs_dialloc_ag_inobt(pag, tp, agbp, parent, inop);

/*
* If pagino is 0 (this is the root inode allocation) use newino.
@@ -1594,8 +1594,8 @@ xfs_ialloc_next_ag(

static bool
xfs_dialloc_good_ag(
- struct xfs_trans *tp,
struct xfs_perag *pag,
+ struct xfs_trans *tp,
umode_t mode,
int flags,
bool ok_alloc)
@@ -1606,6 +1606,8 @@ xfs_dialloc_good_ag(
int needspace;
int error;

+ if (!pag)
+ return false;
if (!pag->pagi_inodeok)
return false;

@@ -1665,8 +1667,8 @@ xfs_dialloc_good_ag(

static int
xfs_dialloc_try_ag(
- struct xfs_trans **tpp,
struct xfs_perag *pag,
+ struct xfs_trans **tpp,
xfs_ino_t parent,
xfs_ino_t *new_ino,
bool ok_alloc)
@@ -1689,7 +1691,7 @@ xfs_dialloc_try_ag(
goto out_release;
}

- error = xfs_ialloc_ag_alloc(*tpp, agbp, pag);
+ error = xfs_ialloc_ag_alloc(pag, *tpp, agbp);
if (error < 0)
goto out_release;

@@ -1705,7 +1707,7 @@ xfs_dialloc_try_ag(
}

/* Allocate an inode in the found AG */
- error = xfs_dialloc_ag(*tpp, agbp, pag, parent, &ino);
+ error = xfs_dialloc_ag(pag, *tpp, agbp, parent, &ino);
if (!error)
*new_ino = ino;
return error;
@@ -1775,9 +1777,9 @@ xfs_dialloc(
agno = start_agno;
flags = XFS_ALLOC_FLAG_TRYLOCK;
for (;;) {
- pag = xfs_perag_get(mp, agno);
- if (xfs_dialloc_good_ag(*tpp, pag, mode, flags, ok_alloc)) {
- error = xfs_dialloc_try_ag(tpp, pag, parent,
+ pag = xfs_perag_grab(mp, agno);
+ if (xfs_dialloc_good_ag(pag, *tpp, mode, flags, ok_alloc)) {
+ error = xfs_dialloc_try_ag(pag, tpp, parent,
&ino, ok_alloc);
if (error != -EAGAIN)
break;
@@ -1796,12 +1798,12 @@ xfs_dialloc(
}
flags = 0;
}
- xfs_perag_put(pag);
+ xfs_perag_rele(pag);
}

if (!error)
*new_ino = ino;
- xfs_perag_put(pag);
+ xfs_perag_rele(pag);
return error;
}

@@ -1885,14 +1887,14 @@ xfs_difree_inode_chunk(

STATIC int
xfs_difree_inobt(
- struct xfs_mount *mp,
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
xfs_agino_t agino,
struct xfs_icluster *xic,
struct xfs_inobt_rec_incore *orec)
{
+ struct xfs_mount *mp = pag->pag_mount;
struct xfs_agi *agi = agbp->b_addr;
struct xfs_btree_cur *cur;
struct xfs_inobt_rec_incore rec;
@@ -2019,13 +2021,13 @@ xfs_difree_inobt(
*/
STATIC int
xfs_difree_finobt(
- struct xfs_mount *mp,
+ struct xfs_perag *pag,
struct xfs_trans *tp,
struct xfs_buf *agbp,
- struct xfs_perag *pag,
xfs_agino_t agino,
struct xfs_inobt_rec_incore *ibtrec) /* inobt record */
{
+ struct xfs_mount *mp = pag->pag_mount;
struct xfs_btree_cur *cur;
struct xfs_inobt_rec_incore rec;
int offset = agino - ibtrec->ir_startino;
@@ -2179,7 +2181,7 @@ xfs_difree(
/*
* Fix up the inode allocation btree.
*/
- error = xfs_difree_inobt(mp, tp, agbp, pag, agino, xic, &rec);
+ error = xfs_difree_inobt(pag, tp, agbp, agino, xic, &rec);
if (error)
goto error0;

@@ -2187,7 +2189,7 @@ xfs_difree(
* Fix up the free inode btree.
*/
if (xfs_has_finobt(mp)) {
- error = xfs_difree_finobt(mp, tp, agbp, pag, agino, &rec);
+ error = xfs_difree_finobt(pag, tp, agbp, agino, &rec);
if (error)
goto error0;
}
@@ -2911,15 +2913,14 @@ xfs_ialloc_calc_rootino(
*/
int
xfs_ialloc_check_shrink(
+ struct xfs_perag *pag,
struct xfs_trans *tp,
- xfs_agnumber_t agno,
struct xfs_buf *agibp,
xfs_agblock_t new_length)
{
struct xfs_inobt_rec_incore rec;
struct xfs_btree_cur *cur;
struct xfs_mount *mp = tp->t_mountp;
- struct xfs_perag *pag;
xfs_agino_t agino = XFS_AGB_TO_AGINO(mp, new_length);
int has;
int error;
@@ -2927,7 +2928,6 @@ xfs_ialloc_check_shrink(
if (!xfs_has_sparseinodes(mp))
return 0;

- pag = xfs_perag_get(mp, agno);
cur = xfs_inobt_init_cursor(mp, tp, agibp, pag, XFS_BTNUM_INO);

/* Look up the inobt record that would correspond to the new EOFS. */
@@ -2951,6 +2951,5 @@ xfs_ialloc_check_shrink(
}
out:
xfs_btree_del_cursor(cur, error);
- xfs_perag_put(pag);
return error;
}
diff --git a/fs/xfs/libxfs/xfs_ialloc.h b/fs/xfs/libxfs/xfs_ialloc.h
index 4cfce2eebe7e..ab8c30b4ec22 100644
--- a/fs/xfs/libxfs/xfs_ialloc.h
+++ b/fs/xfs/libxfs/xfs_ialloc.h
@@ -107,7 +107,7 @@ int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
xfs_ino_t xfs_ialloc_calc_rootino(struct xfs_mount *mp, int sunit);

-int xfs_ialloc_check_shrink(struct xfs_trans *tp, xfs_agnumber_t agno,
+int xfs_ialloc_check_shrink(struct xfs_perag *pag, struct xfs_trans *tp,
struct xfs_buf *agibp, xfs_agblock_t new_length);

#endif /* __XFS_IALLOC_H__ */
--
2.35.1