From: Dave Chinner <dchinner@xxxxxxxxxx>
In preparation for adding support for intent item whiteouts.
Signed-off-by: Dave Chinner <dchinner@xxxxxxxxxx>
---
fs/xfs/xfs_log_cil.c | 109 +++++++++++++++++++++++++------------------
1 file changed, 64 insertions(+), 45 deletions(-)
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index 9488db6c6b21..bd2c8178255e 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -58,6 +58,38 @@ xlog_cil_set_iclog_hdr_count(struct xfs_cil *cil)
(log->l_iclog_size - log->l_iclog_hsize)));
}
+/*
+ * Check if the current log item was first committed in this sequence.
+ * We can't rely on just the log item being in the CIL, we have to check
+ * the recorded commit sequence number.
+ *
+ * Note: for this to be used in a non-racy manner, it has to be called with
+ * CIL flushing locked out. As a result, it should only be used during the
+ * transaction commit process when deciding what to format into the item.
+ */
+static bool
+xlog_item_in_current_chkpt(
+ struct xfs_cil *cil,
+ struct xfs_log_item *lip)
+{
+ if (test_bit(XLOG_CIL_EMPTY, &cil->xc_flags))
+ return false;
+
+ /*
+ * li_seq is written on the first commit of a log item to record the
+ * first checkpoint it is written to. Hence if it is different to the
+ * current sequence, we're in a new checkpoint.
+ */
+ return lip->li_seq == cil->xc_ctx->sequence;
+}
+
+bool
+xfs_log_item_in_current_chkpt(
+ struct xfs_log_item *lip)
+{
+ return xlog_item_in_current_chkpt(lip->li_mountp->m_log->l_cilp, lip);
+}
+
/*
* Unavoidable forward declaration - xlog_cil_push_work() calls
* xlog_cil_ctx_alloc() itself.
@@ -995,6 +1027,37 @@ xlog_cil_order_cmp(
return l1->lv_order_id > l2->lv_order_id;
}
+/*
+ * Build a log vector chain from the current CIL.
+ */
+static void
+xlog_cil_build_lv_chain(
+ struct xfs_cil_ctx *ctx,
+ uint32_t *num_iovecs,
+ uint32_t *num_bytes)
+{
+
+ while (!list_empty(&ctx->log_items)) {
+ struct xfs_log_item *item;
+ struct xfs_log_vec *lv;
+
+ item = list_first_entry(&ctx->log_items,
+ struct xfs_log_item, li_cil);
+
+ lv = item->li_lv;
+ lv->lv_order_id = item->li_order_id;
+ *num_iovecs += lv->lv_niovecs;
+ /* we don't write ordered log vectors */
+ if (lv->lv_buf_len != XFS_LOG_VEC_ORDERED)
+ *num_bytes += lv->lv_bytes;
+
+ list_add_tail(&lv->lv_list, &ctx->lv_chain);
+ list_del_init(&item->li_cil);
+ item->li_order_id = 0;
+ item->li_lv = NULL;
+ }
+}
+
/*
* Push the Committed Item List to the log.
*
@@ -1017,7 +1080,6 @@ xlog_cil_push_work(
container_of(work, struct xfs_cil_ctx, push_work);
struct xfs_cil *cil = ctx->cil;
struct xlog *log = cil->xc_log;
- struct xfs_log_vec *lv;
struct xfs_cil_ctx *new_ctx;
int num_iovecs = 0;
int num_bytes = 0;
@@ -1116,24 +1178,7 @@ xlog_cil_push_work(
&bdev_flush);
xlog_cil_pcp_aggregate(cil, ctx);
-
- while (!list_empty(&ctx->log_items)) {
- struct xfs_log_item *item;
-
- item = list_first_entry(&ctx->log_items,
- struct xfs_log_item, li_cil);
- lv = item->li_lv;
- lv->lv_order_id = item->li_order_id;
- num_iovecs += lv->lv_niovecs;
- /* we don't write ordered log vectors */
- if (lv->lv_buf_len != XFS_LOG_VEC_ORDERED)
- num_bytes += lv->lv_bytes;
-
- list_add_tail(&lv->lv_list, &ctx->lv_chain);
- list_del_init(&item->li_cil);
- item->li_order_id = 0;
- item->li_lv = NULL;
- }
+ xlog_cil_build_lv_chain(ctx, &num_iovecs, &num_bytes);
/*
* Switch the contexts so we can drop the context lock and move out
@@ -1612,32 +1657,6 @@ xlog_cil_force_seq(
return 0;
}
-/*
- * Check if the current log item was first committed in this sequence.
- * We can't rely on just the log item being in the CIL, we have to check
- * the recorded commit sequence number.
- *
- * Note: for this to be used in a non-racy manner, it has to be called with
- * CIL flushing locked out. As a result, it should only be used during the
- * transaction commit process when deciding what to format into the item.
- */
-bool
-xfs_log_item_in_current_chkpt(
- struct xfs_log_item *lip)
-{
- struct xfs_cil *cil = lip->li_mountp->m_log->l_cilp;
-
- if (test_bit(XLOG_CIL_EMPTY, &cil->xc_flags))
- return false;
-
- /*
- * li_seq is written on the first commit of a log item to record the
- * first checkpoint it is written to. Hence if it is different to the
- * current sequence, we're in a new checkpoint.
- */
- return lip->li_seq == cil->xc_ctx->sequence;
-}
-
/*
* Move dead percpu state to the relevant CIL context structures.
*
--
2.31.1
