[PATCH 17/26] xfs: remove qcore from incore dquots

Darrick J. Wong
2020-07-15T01:54:34Z

Now that we've stopped using qcore entirely, drop it from the incore
dquot.

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>
---
fs/xfs/libxfs/xfs_format.h | 7 +++----
fs/xfs/scrub/quota.c | 4 ----
fs/xfs/xfs_dquot.c | 36 +++++++++++++-----------------------
fs/xfs/xfs_dquot.h | 1 -
4 files changed, 16 insertions(+), 32 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 76d34b77031a..adc3ca11c012 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -1161,10 +1161,9 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
#define XFS_DDQTYPE_ANY (XFS_DDQTYPE_REC_MASK)

/*
- * This is the main portion of the on-disk representation of quota
- * information for a user. This is the q_core of the struct xfs_dquot that
- * is kept in kernel memory. We pad this with some more expansion room
- * to construct the on disk structure.
+ * This is the main portion of the on-disk representation of quota information
+ * for a user. We pad this with some more expansion room to construct the on
+ * disk structure.
*/
struct xfs_disk_dquot {
__be16 d_magic; /* dquot magic = XFS_DQUOT_MAGIC */
diff --git a/fs/xfs/scrub/quota.c b/fs/xfs/scrub/quota.c
index d002af3ab164..f045895f28ff 100644
--- a/fs/xfs/scrub/quota.c
+++ b/fs/xfs/scrub/quota.c
@@ -80,7 +80,6 @@ xchk_quota_item(
struct xchk_quota_info *sqi = priv;
struct xfs_scrub *sc = sqi->sc;
struct xfs_mount *mp = sc->mp;
- struct xfs_disk_dquot *d = &dq->q_core;
struct xfs_quotainfo *qi = mp->m_quotainfo;
xfs_fileoff_t offset;
xfs_ino_t fs_icount;
@@ -99,9 +98,6 @@ xchk_quota_item(

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);
-
/*
* Warn if the hard limits are larger than the fs.
* Administrators can do this, though in production this seems
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index ad17ce622805..75b22560244e 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -535,7 +535,6 @@ xfs_dquot_from_disk(
}

/* copy everything from disk dquot to the incore dquot */
- memcpy(&dqp->q_core, ddqp, sizeof(struct xfs_disk_dquot));
dqp->q_blk.hardlimit = be64_to_cpu(ddqp->d_blk_hardlimit);
dqp->q_blk.softlimit = be64_to_cpu(ddqp->d_blk_softlimit);
dqp->q_ino.hardlimit = be64_to_cpu(ddqp->d_ino_hardlimit);
@@ -574,7 +573,13 @@ xfs_dquot_to_disk(
struct xfs_disk_dquot *ddqp,
struct xfs_dquot *dqp)
{
- memcpy(ddqp, &dqp->q_core, sizeof(struct xfs_disk_dquot));
+ ddqp->d_magic = cpu_to_be16(XFS_DQUOT_MAGIC);
+ ddqp->d_version = XFS_DQUOT_VERSION;
+ ddqp->d_type = dqp->q_type;
+ ddqp->d_id = cpu_to_be32(dqp->q_id);
+ ddqp->d_pad0 = 0;
+ ddqp->d_pad = 0;
+
ddqp->d_blk_hardlimit = cpu_to_be64(dqp->q_blk.hardlimit);
ddqp->d_blk_softlimit = cpu_to_be64(dqp->q_blk.softlimit);
ddqp->d_ino_hardlimit = cpu_to_be64(dqp->q_ino.hardlimit);
@@ -1193,8 +1198,7 @@ xfs_qm_dqflush(
struct xfs_mount *mp = dqp->q_mount;
struct xfs_log_item *lip = &dqp->q_logitem.qli_item;
struct xfs_buf *bp;
- struct xfs_dqblk *dqb;
- struct xfs_disk_dquot *ddqp;
+ struct xfs_dqblk *dqblk;
xfs_failaddr_t fa;
int error;

@@ -1218,22 +1222,6 @@ xfs_qm_dqflush(
if (error)
goto out_abort;

- /*
- * Calculate the location of the dquot inside the buffer.
- */
- dqb = bp->b_addr + dqp->q_bufoffset;
- ddqp = &dqb->dd_diskdq;
-
- /* sanity check the in-core structure before we flush */
- 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",
- dqp->q_id, fa);
- xfs_buf_relse(bp);
- error = -EFSCORRUPTED;
- goto out_abort;
- }
-
fa = xfs_qm_dqflush_check(dqp);
if (fa) {
xfs_alert(mp, "corrupt dquot ID 0x%x in memory at %pS",
@@ -1243,7 +1231,9 @@ xfs_qm_dqflush(
goto out_abort;
}

- xfs_dquot_to_disk(ddqp, dqp);
+ /* Flush the incore dquot to the ondisk buffer. */
+ dqblk = bp->b_addr + dqp->q_bufoffset;
+ xfs_dquot_to_disk(&dqblk->dd_diskdq, dqp);

/*
* Clear the dirty field and remember the flush lsn for later use.
@@ -1263,8 +1253,8 @@ xfs_qm_dqflush(
* of a dquot without an up-to-date CRC getting to disk.
*/
if (xfs_sb_version_hascrc(&mp->m_sb)) {
- dqb->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
- xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
+ dqblk->dd_lsn = cpu_to_be64(dqp->q_logitem.qli_item.li_lsn);
+ xfs_update_cksum((char *)dqblk, sizeof(struct xfs_dqblk),
XFS_DQUOT_CRC_OFF);
}

diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 6ad89ccb80c0..9bcfa3330f25 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -72,7 +72,6 @@ struct xfs_dquot {
struct xfs_dquot_res q_ino; /* inodes */
struct xfs_dquot_res q_rtb; /* realtime blocks */

- struct xfs_disk_dquot q_core;
struct xfs_dq_logitem q_logitem;

xfs_qcnt_t q_prealloc_lo_wmark;