[PATCH 11/26] xfs: stop using q_core.d_id in the quota code

Darrick J. Wong
2020-07-15T01:53:57Z

Add a dquot id field to the incore dquot, and use that instead of the
one in qcore. This eliminates a bunch of endian conversions and will
eventually allow us to remove qcore entirely.

We also rearrange the start of xfs_dquot to remove padding holes, saving
8 bytes.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Chandan Babu R <chandanrlinux@gmail.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Collins <allison.henderson@oracle.com>
---
fs/xfs/scrub/quota.c | 19 ++++++++++++-------
fs/xfs/xfs_dquot.c | 26 +++++++++++---------------
fs/xfs/xfs_dquot.h | 3 ++-
fs/xfs/xfs_dquot_item.c | 2 +-
fs/xfs/xfs_qm.c | 22 ++++++++++------------
fs/xfs/xfs_qm_syscalls.c | 4 ++--
fs/xfs/xfs_trace.h | 2 +-
fs/xfs/xfs_trans_dquot.c | 8 +++-----
8 files changed, 42 insertions(+), 44 deletions(-)

diff --git a/fs/xfs/scrub/quota.c b/fs/xfs/scrub/quota.c
index 023820d45a50..0d43a9adf5ae 100644
--- a/fs/xfs/scrub/quota.c
+++ b/fs/xfs/scrub/quota.c
@@ -93,7 +93,6 @@ xchk_quota_item(
unsigned long long icount;
unsigned long long rcount;
xfs_ino_t fs_icount;
- xfs_dqid_t id = be32_to_cpu(d->d_id);
int error = 0;

if (xchk_should_terminate(sc, &error))
@@ -103,11 +102,11 @@ xchk_quota_item(
* Except for the root dquot, the actual dquot we got must either have
* the same or higher id as we saw before.
*/
- offset = id / qi->qi_dqperchunk;
- if (id && id <= sqi->last_id)
+ offset = dq->q_id / qi->qi_dqperchunk;
+ if (dq->q_id && dq->q_id <= sqi->last_id)
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);

- sqi->last_id = id;
+ sqi->last_id = dq->q_id;

if (d->d_pad0 != cpu_to_be32(0) || d->d_pad != cpu_to_be16(0))
xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
@@ -172,13 +171,19 @@ xchk_quota_item(
* lower limit than the actual usage. However, we flag it for
* admin review.
*/
- if (id != 0 && bhard != 0 && bcount > bhard)
+ if (dq->q_id == 0)
+ goto out;
+
+ if (bhard != 0 && bcount > bhard)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
- if (id != 0 && ihard != 0 && icount > ihard)
+
+ if (ihard != 0 && icount > ihard)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
- if (id != 0 && rhard != 0 && rcount > rhard)
+
+ if (rhard != 0 && rcount > rhard)
xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);

+out:
if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
return -EFSCORRUPTED;

diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 93b5b7277cb8..5a7f8e49ec2b 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -75,7 +75,7 @@ xfs_qm_adjust_dqlimits(
struct xfs_def_quota *defq;
int prealloc = 0;

- ASSERT(d->d_id);
+ ASSERT(dq->q_id);
defq = xfs_get_defquota(q, dq->q_type);

if (defq->bsoftlimit && !d->d_blk_softlimit) {
@@ -121,7 +121,7 @@ xfs_qm_adjust_dqtimers(
struct xfs_disk_dquot *d = &dq->q_core;
struct xfs_def_quota *defq;

- ASSERT(d->d_id);
+ ASSERT(dq->q_id);
defq = xfs_get_defquota(qi, dq->q_type);

#ifdef DEBUG
@@ -373,8 +373,7 @@ xfs_dquot_disk_alloc(
* Make a chunk of dquots out of this buffer and log
* the entire thing.
*/
- xfs_qm_init_dquot_blk(tp, mp, be32_to_cpu(dqp->q_core.d_id),
- dqp->q_type, bp);
+ xfs_qm_init_dquot_blk(tp, mp, dqp->q_id, dqp->q_type, bp);
xfs_buf_set_ref(bp, XFS_DQUOT_REF);

/*
@@ -486,7 +485,7 @@ xfs_dquot_alloc(
dqp = kmem_zone_zalloc(xfs_qm_dqzone, 0);

dqp->q_type = type;
- dqp->q_core.d_id = cpu_to_be32(id);
+ dqp->q_id = id;
dqp->q_mount = mp;
INIT_LIST_HEAD(&dqp->q_lru);
mutex_init(&dqp->q_qlock);
@@ -544,10 +543,10 @@ xfs_dquot_from_disk(
* Everything else was checked by the dquot buffer verifier.
*/
if ((ddqp->d_type & XFS_DDQTYPE_REC_MASK) != dqp->q_type ||
- ddqp->d_id != dqp->q_core.d_id) {
+ be32_to_cpu(ddqp->d_id) != dqp->q_id) {
xfs_alert_tag(bp->b_mount, XFS_PTAG_VERIFIER_ERROR,
"Metadata corruption detected at %pS, quota %u",
- __this_address, be32_to_cpu(dqp->q_core.d_id));
+ __this_address, dqp->q_id);
xfs_alert(bp->b_mount, "Unmount and run xfs_repair");
return -EFSCORRUPTED;
}
@@ -1192,11 +1191,10 @@ xfs_qm_dqflush(
ddqp = &dqb->dd_diskdq;

/* sanity check the in-core structure before we flush */
- fa = xfs_dquot_verify(mp, &dqp->q_core, be32_to_cpu(dqp->q_core.d_id),
- 0);
+ fa = xfs_dquot_verify(mp, &dqp->q_core, dqp->q_id, 0);
if (fa) {
xfs_alert(mp, "corrupt dquot ID 0x%x in memory at %pS",
- be32_to_cpu(dqp->q_core.d_id), fa);
+ dqp->q_id, fa);
xfs_buf_relse(bp);
error = -EFSCORRUPTED;
goto out_abort;
@@ -1205,7 +1203,7 @@ xfs_qm_dqflush(
fa = xfs_qm_dqflush_check(dqp);
if (fa) {
xfs_alert(mp, "corrupt dquot ID 0x%x in memory at %pS",
- be32_to_cpu(dqp->q_core.d_id), fa);
+ dqp->q_id, fa);
xfs_buf_relse(bp);
error = -EFSCORRUPTED;
goto out_abort;
@@ -1278,8 +1276,7 @@ xfs_dqlock2(
{
if (d1 && d2) {
ASSERT(d1 != d2);
- if (be32_to_cpu(d1->q_core.d_id) >
- be32_to_cpu(d2->q_core.d_id)) {
+ if (d1->q_id > d2->q_id) {
mutex_lock(&d2->q_qlock);
mutex_lock_nested(&d1->q_qlock, XFS_QLOCK_NESTED);
} else {
@@ -1347,9 +1344,8 @@ xfs_qm_dqiterate(
return error;

error = iter_fn(dq, type, priv);
- id = be32_to_cpu(dq->q_core.d_id);
+ id = dq->q_id;
xfs_qm_dqput(dq);
- id++;
} while (error == 0 && id != 0);

return error;
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 84399d1d8188..9da4cb3d752b 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -35,9 +35,10 @@ struct xfs_dquot {
struct xfs_mount *q_mount;
xfs_dqtype_t q_type;
uint16_t q_flags;
+ xfs_dqid_t q_id;
uint q_nrefs;
- xfs_daddr_t q_blkno;
int q_bufoffset;
+ xfs_daddr_t q_blkno;
xfs_fileoff_t q_fileoffset;

struct xfs_disk_dquot q_core;
diff --git a/fs/xfs/xfs_dquot_item.c b/fs/xfs/xfs_dquot_item.c
index fc21e48c889c..8c1fdf37ee8f 100644
--- a/fs/xfs/xfs_dquot_item.c
+++ b/fs/xfs/xfs_dquot_item.c
@@ -53,7 +53,7 @@ xfs_qm_dquot_logitem_format(
qlf = xlog_prepare_iovec(lv, &vecp, XLOG_REG_TYPE_QFORMAT);
qlf->qlf_type = XFS_LI_DQUOT;
qlf->qlf_size = 2;
- qlf->qlf_id = be32_to_cpu(qlip->qli_dquot->q_core.d_id);
+ qlf->qlf_id = qlip->qli_dquot->q_id;
qlf->qlf_blkno = qlip->qli_dquot->q_blkno;
qlf->qlf_len = 1;
qlf->qlf_boffset = qlip->qli_dquot->q_bufoffset;
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index f6c18cc0c970..f63922277120 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -79,7 +79,7 @@ xfs_qm_dquot_walk(
for (i = 0; i < nr_found; i++) {
struct xfs_dquot *dqp = batch[i];

- next_index = be32_to_cpu(dqp->q_core.d_id) + 1;
+ next_index = dqp->q_id + 1;

error = execute(batch[i], data);
if (error == -EAGAIN) {
@@ -161,8 +161,7 @@ xfs_qm_dqpurge(
xfs_dqfunlock(dqp);
xfs_dqunlock(dqp);

- radix_tree_delete(xfs_dquot_tree(qi, dqp->q_type),
- be32_to_cpu(dqp->q_core.d_id));
+ radix_tree_delete(xfs_dquot_tree(qi, dqp->q_type), dqp->q_id);
qi->qi_dquots--;

/*
@@ -1108,7 +1107,7 @@ xfs_qm_quotacheck_dqadjust(
*
* There are no timers for the default values set in the root dquot.
*/
- if (dqp->q_core.d_id) {
+ if (dqp->q_id) {
xfs_qm_adjust_dqlimits(mp, dqp);
xfs_qm_adjust_dqtimers(mp, dqp);
}
@@ -1594,8 +1593,7 @@ xfs_qm_dqfree_one(
struct xfs_quotainfo *qi = mp->m_quotainfo;

mutex_lock(&qi->qi_tree_lock);
- radix_tree_delete(xfs_dquot_tree(qi, dqp->q_type),
- be32_to_cpu(dqp->q_core.d_id));
+ radix_tree_delete(xfs_dquot_tree(qi, dqp->q_type), dqp->q_id);

qi->qi_dquots--;
mutex_unlock(&qi->qi_tree_lock);
@@ -1819,7 +1817,7 @@ xfs_qm_vop_chown_reserve(
XFS_QMOPT_RES_RTBLKS : XFS_QMOPT_RES_REGBLKS;

if (XFS_IS_UQUOTA_ON(mp) && udqp &&
- i_uid_read(VFS_I(ip)) != be32_to_cpu(udqp->q_core.d_id)) {
+ i_uid_read(VFS_I(ip)) != udqp->q_id) {
udq_delblks = udqp;
/*
* If there are delayed allocation blocks, then we have to
@@ -1832,7 +1830,7 @@ xfs_qm_vop_chown_reserve(
}
}
if (XFS_IS_GQUOTA_ON(ip->i_mount) && gdqp &&
- i_gid_read(VFS_I(ip)) != be32_to_cpu(gdqp->q_core.d_id)) {
+ i_gid_read(VFS_I(ip)) != gdqp->q_id) {
gdq_delblks = gdqp;
if (delblks) {
ASSERT(ip->i_gdquot);
@@ -1841,7 +1839,7 @@ xfs_qm_vop_chown_reserve(
}

if (XFS_IS_PQUOTA_ON(ip->i_mount) && pdqp &&
- ip->i_d.di_projid != be32_to_cpu(pdqp->q_core.d_id)) {
+ ip->i_d.di_projid != pdqp->q_id) {
pdq_delblks = pdqp;
if (delblks) {
ASSERT(ip->i_pdquot);
@@ -1925,21 +1923,21 @@ xfs_qm_vop_create_dqattach(

if (udqp && XFS_IS_UQUOTA_ON(mp)) {
ASSERT(ip->i_udquot == NULL);
- ASSERT(i_uid_read(VFS_I(ip)) == be32_to_cpu(udqp->q_core.d_id));
+ ASSERT(i_uid_read(VFS_I(ip)) == udqp->q_id);

ip->i_udquot = xfs_qm_dqhold(udqp);
xfs_trans_mod_dquot(tp, udqp, XFS_TRANS_DQ_ICOUNT, 1);
}
if (gdqp && XFS_IS_GQUOTA_ON(mp)) {
ASSERT(ip->i_gdquot == NULL);
- ASSERT(i_gid_read(VFS_I(ip)) == be32_to_cpu(gdqp->q_core.d_id));
+ ASSERT(i_gid_read(VFS_I(ip)) == gdqp->q_id);

ip->i_gdquot = xfs_qm_dqhold(gdqp);
xfs_trans_mod_dquot(tp, gdqp, XFS_TRANS_DQ_ICOUNT, 1);
}
if (pdqp && XFS_IS_PQUOTA_ON(mp)) {
ASSERT(ip->i_pdquot == NULL);
- ASSERT(ip->i_d.di_projid == be32_to_cpu(pdqp->q_core.d_id));
+ ASSERT(ip->i_d.di_projid == pdqp->q_id);

ip->i_pdquot = xfs_qm_dqhold(pdqp);
xfs_trans_mod_dquot(tp, pdqp, XFS_TRANS_DQ_ICOUNT, 1);
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index 7f157275e370..15158e5e07e6 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -656,7 +656,7 @@ xfs_qm_scall_getquota_fill_qc(
if (((XFS_IS_UQUOTA_ENFORCED(mp) && type == XFS_DQTYPE_USER) ||
(XFS_IS_GQUOTA_ENFORCED(mp) && type == XFS_DQTYPE_GROUP) ||
(XFS_IS_PQUOTA_ENFORCED(mp) && type == XFS_DQTYPE_PROJ)) &&
- dqp->q_core.d_id != 0) {
+ dqp->q_id != 0) {
if ((dst->d_space > dst->d_spc_softlimit) &&
(dst->d_spc_softlimit > 0)) {
ASSERT(dst->d_spc_timer != 0);
@@ -723,7 +723,7 @@ xfs_qm_scall_getquota_next(
return error;

/* Fill in the ID we actually read from disk */
- *id = be32_to_cpu(dqp->q_core.d_id);
+ *id = dqp->q_id;

xfs_qm_scall_getquota_fill_qc(mp, type, dqp, dst);

diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 0b6738070619..8a73d30c4a87 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -877,7 +877,7 @@ DECLARE_EVENT_CLASS(xfs_dquot_class,
), \
TP_fast_assign(
__entry->dev = dqp->q_mount->m_super->s_dev;
- __entry->id = be32_to_cpu(dqp->q_core.d_id);
+ __entry->id = dqp->q_id;
__entry->type = dqp->q_type;
__entry->flags = dqp->q_flags;
__entry->nrefs = dqp->q_nrefs;
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index bdbd8e88c772..302aee9ccf80 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -386,7 +386,7 @@ xfs_trans_apply_dquot_deltas(
* Get any default limits in use.
* Start/reset the timer(s) if needed.
*/
- if (d->d_id) {
+ if (dqp->q_id) {
xfs_qm_adjust_dqlimits(tp->t_mountp, dqp);
xfs_qm_adjust_dqtimers(tp->t_mountp, dqp);
}
@@ -565,8 +565,7 @@ xfs_quota_warn(
return;
}

- quota_send_warning(make_kqid(&init_user_ns, qtype,
- be32_to_cpu(dqp->q_core.d_id)),
+ quota_send_warning(make_kqid(&init_user_ns, qtype, dqp->q_id),
mp->m_super->s_dev, type);
}

@@ -625,8 +624,7 @@ xfs_trans_dqresv(
resbcountp = &dqp->q_res_rtbcount;
}

- if ((flags & XFS_QMOPT_FORCE_RES) == 0 &&
- dqp->q_core.d_id &&
+ if ((flags & XFS_QMOPT_FORCE_RES) == 0 && dqp->q_id &&
((XFS_IS_UQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISUDQ(dqp)) ||
(XFS_IS_GQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISGDQ(dqp)) ||
(XFS_IS_PQUOTA_ENFORCED(dqp->q_mount) && XFS_QM_ISPDQ(dqp)))) {