xfs: refactor log recovery dquot item dispatch for pass2 commit functions

Move the log dquot item pass2 commit code into the per-item source code
files and use the dispatch function to call it.  We do these one at a
time because there's a lot of code to move.  No functional changes.

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>

1 files changed, 109 insertions, 0 deletions

diff --git a/fs/xfs/xfs_dquot_item_recover.c b/fs/xfs/xfs_dquot_item_recover.c
index ebc44c1bc2b1..07ff943972a3 100644
--- a/fs/xfs/xfs_dquot_item_recover.c
+++ b/fs/xfs/xfs_dquot_item_recover.c
@@ -53,9 +53,118 @@ xlog_recover_dquot_ra_pass2(
 			&xfs_dquot_buf_ra_ops);
 }
 
+/*
+ * Recover a dquot record
+ */
+STATIC int
+xlog_recover_dquot_commit_pass2(
+	struct xlog			*log,
+	struct list_head		*buffer_list,
+	struct xlog_recover_item	*item,
+	xfs_lsn_t			current_lsn)
+{
+	struct xfs_mount		*mp = log->l_mp;
+	struct xfs_buf			*bp;
+	struct xfs_disk_dquot		*ddq, *recddq;
+	struct xfs_dq_logformat		*dq_f;
+	xfs_failaddr_t			fa;
+	int				error;
+	uint				type;
+
+	/*
+	 * Filesystems are required to send in quota flags at mount time.
+	 */
+	if (mp->m_qflags == 0)
+		return 0;
+
+	recddq = item->ri_buf[1].i_addr;
+	if (recddq == NULL) {
+		xfs_alert(log->l_mp, "NULL dquot in %s.", __func__);
+		return -EFSCORRUPTED;
+	}
+	if (item->ri_buf[1].i_len < sizeof(struct xfs_disk_dquot)) {
+		xfs_alert(log->l_mp, "dquot too small (%d) in %s.",
+			item->ri_buf[1].i_len, __func__);
+		return -EFSCORRUPTED;
+	}
+
+	/*
+	 * This type of quotas was turned off, so ignore this record.
+	 */
+	type = recddq->d_flags & (XFS_DQ_USER | XFS_DQ_PROJ | XFS_DQ_GROUP);
+	ASSERT(type);
+	if (log->l_quotaoffs_flag & type)
+		return 0;
+
+	/*
+	 * At this point we know that quota was _not_ turned off.
+	 * Since the mount flags are not indicating to us otherwise, this
+	 * must mean that quota is on, and the dquot needs to be replayed.
+	 * Remember that we may not have fully recovered the superblock yet,
+	 * so we can't do the usual trick of looking at the SB quota bits.
+	 *
+	 * The other possibility, of course, is that the quota subsystem was
+	 * removed since the last mount - ENOSYS.
+	 */
+	dq_f = item->ri_buf[0].i_addr;
+	ASSERT(dq_f);
+	fa = xfs_dquot_verify(mp, recddq, dq_f->qlf_id, 0);
+	if (fa) {
+		xfs_alert(mp, "corrupt dquot ID 0x%x in log at %pS",
+				dq_f->qlf_id, fa);
+		return -EFSCORRUPTED;
+	}
+	ASSERT(dq_f->qlf_len == 1);
+
+	/*
+	 * At this point we are assuming that the dquots have been allocated
+	 * and hence the buffer has valid dquots stamped in it. It should,
+	 * therefore, pass verifier validation. If the dquot is bad, then the
+	 * we'll return an error here, so we don't need to specifically check
+	 * the dquot in the buffer after the verifier has run.
+	 */
+	error = xfs_trans_read_buf(mp, NULL, mp->m_ddev_targp, dq_f->qlf_blkno,
+				   XFS_FSB_TO_BB(mp, dq_f->qlf_len), 0, &bp,
+				   &xfs_dquot_buf_ops);
+	if (error)
+		return error;
+
+	ASSERT(bp);
+	ddq = xfs_buf_offset(bp, dq_f->qlf_boffset);
+
+	/*
+	 * If the dquot has an LSN in it, recover the dquot only if it's less
+	 * than the lsn of the transaction we are replaying.
+	 */
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		struct xfs_dqblk *dqb = (struct xfs_dqblk *)ddq;
+		xfs_lsn_t	lsn = be64_to_cpu(dqb->dd_lsn);
+
+		if (lsn && lsn != -1 && XFS_LSN_CMP(lsn, current_lsn) >= 0) {
+			goto out_release;
+		}
+	}
+
+	memcpy(ddq, recddq, item->ri_buf[1].i_len);
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		xfs_update_cksum((char *)ddq, sizeof(struct xfs_dqblk),
+				 XFS_DQUOT_CRC_OFF);
+	}
+
+	ASSERT(dq_f->qlf_size == 2);
+	ASSERT(bp->b_mount == mp);
+	bp->b_iodone = xlog_recover_iodone;
+	xfs_buf_delwri_queue(bp, buffer_list);
+
+out_release:
+	xfs_buf_relse(bp);
+	return 0;
+}
+
 const struct xlog_recover_item_ops xlog_dquot_item_ops = {
 	.item_type		= XFS_LI_DQUOT,
 	.ra_pass2		= xlog_recover_dquot_ra_pass2,
+	.commit_pass2		= xlog_recover_dquot_commit_pass2,
 };
 
 /*