From a5969cabbb4660eab42b6ef0412cbbd1200cf14d Mon Sep 17 00:00:00 2001
From: hc <hc@nodka.com>
Date: Sat, 12 Oct 2024 07:10:09 +0000
Subject: [PATCH] 修改led为gpio
---
kernel/fs/xfs/xfs_refcount_item.c | 588 +++++++++++++++++++++++++++++++++++++---------------------
1 files changed, 377 insertions(+), 211 deletions(-)
diff --git a/kernel/fs/xfs/xfs_refcount_item.c b/kernel/fs/xfs/xfs_refcount_item.c
index fce38b5..7529eb6 100644
--- a/kernel/fs/xfs/xfs_refcount_item.c
+++ b/kernel/fs/xfs/xfs_refcount_item.c
@@ -14,28 +14,31 @@
#include "xfs_defer.h"
#include "xfs_trans.h"
#include "xfs_trans_priv.h"
-#include "xfs_buf_item.h"
#include "xfs_refcount_item.h"
#include "xfs_log.h"
#include "xfs_refcount.h"
-
+#include "xfs_error.h"
+#include "xfs_log_priv.h"
+#include "xfs_log_recover.h"
kmem_zone_t *xfs_cui_zone;
kmem_zone_t *xfs_cud_zone;
+
+static const struct xfs_item_ops xfs_cui_item_ops;
static inline struct xfs_cui_log_item *CUI_ITEM(struct xfs_log_item *lip)
{
return container_of(lip, struct xfs_cui_log_item, cui_item);
}
-void
+STATIC void
xfs_cui_item_free(
struct xfs_cui_log_item *cuip)
{
if (cuip->cui_format.cui_nextents > XFS_CUI_MAX_FAST_EXTENTS)
kmem_free(cuip);
else
- kmem_zone_free(xfs_cui_zone, cuip);
+ kmem_cache_free(xfs_cui_zone, cuip);
}
/*
@@ -45,13 +48,13 @@
* committed vs unpin operations in bulk insert operations. Hence the reference
* count to ensure only the last caller frees the CUI.
*/
-void
+STATIC void
xfs_cui_release(
struct xfs_cui_log_item *cuip)
{
ASSERT(atomic_read(&cuip->cui_refcount) > 0);
if (atomic_dec_and_test(&cuip->cui_refcount)) {
- xfs_trans_ail_remove(&cuip->cui_item, SHUTDOWN_LOG_IO_ERROR);
+ xfs_trans_ail_delete(&cuip->cui_item, SHUTDOWN_LOG_IO_ERROR);
xfs_cui_item_free(cuip);
}
}
@@ -95,15 +98,6 @@
}
/*
- * Pinning has no meaning for an cui item, so just return.
- */
-STATIC void
-xfs_cui_item_pin(
- struct xfs_log_item *lip)
-{
-}
-
-/*
* The unpin operation is the last place an CUI is manipulated in the log. It is
* either inserted in the AIL or aborted in the event of a log I/O error. In
* either case, the CUI transaction has been successfully committed to make it
@@ -122,77 +116,21 @@
}
/*
- * CUI items have no locking or pushing. However, since CUIs are pulled from
- * the AIL when their corresponding CUDs are committed to disk, their situation
- * is very similar to being pinned. Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log. This should help in getting the CUI out of
- * the AIL.
- */
-STATIC uint
-xfs_cui_item_push(
- struct xfs_log_item *lip,
- struct list_head *buffer_list)
-{
- return XFS_ITEM_PINNED;
-}
-
-/*
* The CUI has been either committed or aborted if the transaction has been
* cancelled. If the transaction was cancelled, an CUD isn't going to be
* constructed and thus we free the CUI here directly.
*/
STATIC void
-xfs_cui_item_unlock(
+xfs_cui_item_release(
struct xfs_log_item *lip)
{
- if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
- xfs_cui_release(CUI_ITEM(lip));
+ xfs_cui_release(CUI_ITEM(lip));
}
-
-/*
- * The CUI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_cui_item_committed(
- struct xfs_log_item *lip,
- xfs_lsn_t lsn)
-{
- return lsn;
-}
-
-/*
- * The CUI dependency tracking op doesn't do squat. It can't because
- * it doesn't know where the free extent is coming from. The dependency
- * tracking has to be handled by the "enclosing" metadata object. For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_cui_item_committing(
- struct xfs_log_item *lip,
- xfs_lsn_t lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all cui log items.
- */
-static const struct xfs_item_ops xfs_cui_item_ops = {
- .iop_size = xfs_cui_item_size,
- .iop_format = xfs_cui_item_format,
- .iop_pin = xfs_cui_item_pin,
- .iop_unpin = xfs_cui_item_unpin,
- .iop_unlock = xfs_cui_item_unlock,
- .iop_committed = xfs_cui_item_committed,
- .iop_push = xfs_cui_item_push,
- .iop_committing = xfs_cui_item_committing,
-};
/*
* Allocate and initialize an cui item with the given number of extents.
*/
-struct xfs_cui_log_item *
+STATIC struct xfs_cui_log_item *
xfs_cui_init(
struct xfs_mount *mp,
uint nextents)
@@ -203,9 +141,10 @@
ASSERT(nextents > 0);
if (nextents > XFS_CUI_MAX_FAST_EXTENTS)
cuip = kmem_zalloc(xfs_cui_log_item_sizeof(nextents),
- KM_SLEEP);
+ 0);
else
- cuip = kmem_zone_zalloc(xfs_cui_zone, KM_SLEEP);
+ cuip = kmem_cache_zalloc(xfs_cui_zone,
+ GFP_KERNEL | __GFP_NOFAIL);
xfs_log_item_init(mp, &cuip->cui_item, XFS_LI_CUI, &xfs_cui_item_ops);
cuip->cui_format.cui_nextents = nextents;
@@ -254,152 +193,255 @@
}
/*
- * Pinning has no meaning for an cud item, so just return.
- */
-STATIC void
-xfs_cud_item_pin(
- struct xfs_log_item *lip)
-{
-}
-
-/*
- * Since pinning has no meaning for an cud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_cud_item_unpin(
- struct xfs_log_item *lip,
- int remove)
-{
-}
-
-/*
- * There isn't much you can do to push on an cud item. It is simply stuck
- * waiting for the log to be flushed to disk.
- */
-STATIC uint
-xfs_cud_item_push(
- struct xfs_log_item *lip,
- struct list_head *buffer_list)
-{
- return XFS_ITEM_PINNED;
-}
-
-/*
* The CUD is either committed or aborted if the transaction is cancelled. If
* the transaction is cancelled, drop our reference to the CUI and free the
* CUD.
*/
STATIC void
-xfs_cud_item_unlock(
+xfs_cud_item_release(
struct xfs_log_item *lip)
{
struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
- if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
- xfs_cui_release(cudp->cud_cuip);
- kmem_zone_free(xfs_cud_zone, cudp);
- }
-}
-
-/*
- * When the cud item is committed to disk, all we need to do is delete our
- * reference to our partner cui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_cud_item_committed(
- struct xfs_log_item *lip,
- xfs_lsn_t lsn)
-{
- struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
-
- /*
- * Drop the CUI reference regardless of whether the CUD has been
- * aborted. Once the CUD transaction is constructed, it is the sole
- * responsibility of the CUD to release the CUI (even if the CUI is
- * aborted due to log I/O error).
- */
xfs_cui_release(cudp->cud_cuip);
- kmem_zone_free(xfs_cud_zone, cudp);
-
- return (xfs_lsn_t)-1;
+ kmem_cache_free(xfs_cud_zone, cudp);
}
-/*
- * The CUD dependency tracking op doesn't do squat. It can't because
- * it doesn't know where the free extent is coming from. The dependency
- * tracking has to be handled by the "enclosing" metadata object. For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_cud_item_committing(
- struct xfs_log_item *lip,
- xfs_lsn_t lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all cud log items.
- */
static const struct xfs_item_ops xfs_cud_item_ops = {
+ .flags = XFS_ITEM_RELEASE_WHEN_COMMITTED,
.iop_size = xfs_cud_item_size,
.iop_format = xfs_cud_item_format,
- .iop_pin = xfs_cud_item_pin,
- .iop_unpin = xfs_cud_item_unpin,
- .iop_unlock = xfs_cud_item_unlock,
- .iop_committed = xfs_cud_item_committed,
- .iop_push = xfs_cud_item_push,
- .iop_committing = xfs_cud_item_committing,
+ .iop_release = xfs_cud_item_release,
};
-/*
- * Allocate and initialize an cud item with the given number of extents.
- */
-struct xfs_cud_log_item *
-xfs_cud_init(
- struct xfs_mount *mp,
+static struct xfs_cud_log_item *
+xfs_trans_get_cud(
+ struct xfs_trans *tp,
struct xfs_cui_log_item *cuip)
-
{
- struct xfs_cud_log_item *cudp;
+ struct xfs_cud_log_item *cudp;
- cudp = kmem_zone_zalloc(xfs_cud_zone, KM_SLEEP);
- xfs_log_item_init(mp, &cudp->cud_item, XFS_LI_CUD, &xfs_cud_item_ops);
+ cudp = kmem_cache_zalloc(xfs_cud_zone, GFP_KERNEL | __GFP_NOFAIL);
+ xfs_log_item_init(tp->t_mountp, &cudp->cud_item, XFS_LI_CUD,
+ &xfs_cud_item_ops);
cudp->cud_cuip = cuip;
cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
+ xfs_trans_add_item(tp, &cudp->cud_item);
return cudp;
}
+
+/*
+ * Finish an refcount update and log it to the CUD. Note that the
+ * transaction is marked dirty regardless of whether the refcount
+ * update succeeds or fails to support the CUI/CUD lifecycle rules.
+ */
+static int
+xfs_trans_log_finish_refcount_update(
+ struct xfs_trans *tp,
+ struct xfs_cud_log_item *cudp,
+ enum xfs_refcount_intent_type type,
+ xfs_fsblock_t startblock,
+ xfs_extlen_t blockcount,
+ xfs_fsblock_t *new_fsb,
+ xfs_extlen_t *new_len,
+ struct xfs_btree_cur **pcur)
+{
+ int error;
+
+ error = xfs_refcount_finish_one(tp, type, startblock,
+ blockcount, new_fsb, new_len, pcur);
+
+ /*
+ * Mark the transaction dirty, even on error. This ensures the
+ * transaction is aborted, which:
+ *
+ * 1.) releases the CUI and frees the CUD
+ * 2.) shuts down the filesystem
+ */
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
+
+ return error;
+}
+
+/* Sort refcount intents by AG. */
+static int
+xfs_refcount_update_diff_items(
+ void *priv,
+ struct list_head *a,
+ struct list_head *b)
+{
+ struct xfs_mount *mp = priv;
+ struct xfs_refcount_intent *ra;
+ struct xfs_refcount_intent *rb;
+
+ ra = container_of(a, struct xfs_refcount_intent, ri_list);
+ rb = container_of(b, struct xfs_refcount_intent, ri_list);
+ return XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
+ XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
+}
+
+/* Set the phys extent flags for this reverse mapping. */
+static void
+xfs_trans_set_refcount_flags(
+ struct xfs_phys_extent *refc,
+ enum xfs_refcount_intent_type type)
+{
+ refc->pe_flags = 0;
+ switch (type) {
+ case XFS_REFCOUNT_INCREASE:
+ case XFS_REFCOUNT_DECREASE:
+ case XFS_REFCOUNT_ALLOC_COW:
+ case XFS_REFCOUNT_FREE_COW:
+ refc->pe_flags |= type;
+ break;
+ default:
+ ASSERT(0);
+ }
+}
+
+/* Log refcount updates in the intent item. */
+STATIC void
+xfs_refcount_update_log_item(
+ struct xfs_trans *tp,
+ struct xfs_cui_log_item *cuip,
+ struct xfs_refcount_intent *refc)
+{
+ uint next_extent;
+ struct xfs_phys_extent *ext;
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
+
+ /*
+ * atomic_inc_return gives us the value after the increment;
+ * we want to use it as an array index so we need to subtract 1 from
+ * it.
+ */
+ next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
+ ASSERT(next_extent < cuip->cui_format.cui_nextents);
+ ext = &cuip->cui_format.cui_extents[next_extent];
+ ext->pe_startblock = refc->ri_startblock;
+ ext->pe_len = refc->ri_blockcount;
+ xfs_trans_set_refcount_flags(ext, refc->ri_type);
+}
+
+static struct xfs_log_item *
+xfs_refcount_update_create_intent(
+ struct xfs_trans *tp,
+ struct list_head *items,
+ unsigned int count,
+ bool sort)
+{
+ struct xfs_mount *mp = tp->t_mountp;
+ struct xfs_cui_log_item *cuip = xfs_cui_init(mp, count);
+ struct xfs_refcount_intent *refc;
+
+ ASSERT(count > 0);
+
+ xfs_trans_add_item(tp, &cuip->cui_item);
+ if (sort)
+ list_sort(mp, items, xfs_refcount_update_diff_items);
+ list_for_each_entry(refc, items, ri_list)
+ xfs_refcount_update_log_item(tp, cuip, refc);
+ return &cuip->cui_item;
+}
+
+/* Get an CUD so we can process all the deferred refcount updates. */
+static struct xfs_log_item *
+xfs_refcount_update_create_done(
+ struct xfs_trans *tp,
+ struct xfs_log_item *intent,
+ unsigned int count)
+{
+ return &xfs_trans_get_cud(tp, CUI_ITEM(intent))->cud_item;
+}
+
+/* Process a deferred refcount update. */
+STATIC int
+xfs_refcount_update_finish_item(
+ struct xfs_trans *tp,
+ struct xfs_log_item *done,
+ struct list_head *item,
+ struct xfs_btree_cur **state)
+{
+ struct xfs_refcount_intent *refc;
+ xfs_fsblock_t new_fsb;
+ xfs_extlen_t new_aglen;
+ int error;
+
+ refc = container_of(item, struct xfs_refcount_intent, ri_list);
+ error = xfs_trans_log_finish_refcount_update(tp, CUD_ITEM(done),
+ refc->ri_type, refc->ri_startblock, refc->ri_blockcount,
+ &new_fsb, &new_aglen, state);
+
+ /* Did we run out of reservation? Requeue what we didn't finish. */
+ if (!error && new_aglen > 0) {
+ ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
+ refc->ri_type == XFS_REFCOUNT_DECREASE);
+ refc->ri_startblock = new_fsb;
+ refc->ri_blockcount = new_aglen;
+ return -EAGAIN;
+ }
+ kmem_free(refc);
+ return error;
+}
+
+/* Abort all pending CUIs. */
+STATIC void
+xfs_refcount_update_abort_intent(
+ struct xfs_log_item *intent)
+{
+ xfs_cui_release(CUI_ITEM(intent));
+}
+
+/* Cancel a deferred refcount update. */
+STATIC void
+xfs_refcount_update_cancel_item(
+ struct list_head *item)
+{
+ struct xfs_refcount_intent *refc;
+
+ refc = container_of(item, struct xfs_refcount_intent, ri_list);
+ kmem_free(refc);
+}
+
+const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
+ .max_items = XFS_CUI_MAX_FAST_EXTENTS,
+ .create_intent = xfs_refcount_update_create_intent,
+ .abort_intent = xfs_refcount_update_abort_intent,
+ .create_done = xfs_refcount_update_create_done,
+ .finish_item = xfs_refcount_update_finish_item,
+ .finish_cleanup = xfs_refcount_finish_one_cleanup,
+ .cancel_item = xfs_refcount_update_cancel_item,
+};
/*
* Process a refcount update intent item that was recovered from the log.
* We need to update the refcountbt.
*/
-int
-xfs_cui_recover(
- struct xfs_trans *parent_tp,
- struct xfs_cui_log_item *cuip)
+STATIC int
+xfs_cui_item_recover(
+ struct xfs_log_item *lip,
+ struct list_head *capture_list)
{
- int i;
- int error = 0;
- unsigned int refc_type;
+ struct xfs_bmbt_irec irec;
+ struct xfs_cui_log_item *cuip = CUI_ITEM(lip);
struct xfs_phys_extent *refc;
- xfs_fsblock_t startblock_fsb;
- bool op_ok;
struct xfs_cud_log_item *cudp;
struct xfs_trans *tp;
struct xfs_btree_cur *rcur = NULL;
- enum xfs_refcount_intent_type type;
+ struct xfs_mount *mp = lip->li_mountp;
+ xfs_fsblock_t startblock_fsb;
xfs_fsblock_t new_fsb;
xfs_extlen_t new_len;
- struct xfs_bmbt_irec irec;
+ unsigned int refc_type;
+ bool op_ok;
bool requeue_only = false;
- struct xfs_mount *mp = parent_tp->t_mountp;
-
- ASSERT(!test_bit(XFS_CUI_RECOVERED, &cuip->cui_flags));
+ enum xfs_refcount_intent_type type;
+ int i;
+ int error = 0;
/*
* First check the validity of the extents described by the
@@ -425,15 +467,8 @@
refc->pe_len == 0 ||
startblock_fsb >= mp->m_sb.sb_dblocks ||
refc->pe_len >= mp->m_sb.sb_agblocks ||
- (refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS)) {
- /*
- * This will pull the CUI from the AIL and
- * free the memory associated with it.
- */
- set_bit(XFS_CUI_RECOVERED, &cuip->cui_flags);
- xfs_cui_release(cuip);
- return -EIO;
- }
+ (refc->pe_flags & ~XFS_REFCOUNT_EXTENT_FLAGS))
+ return -EFSCORRUPTED;
}
/*
@@ -444,7 +479,7 @@
* transaction. Normally, any work that needs to be deferred
* gets attached to the same defer_ops that scheduled the
* refcount update. However, we're in log recovery here, so we
- * we use the passed in defer_ops and to finish up any work that
+ * use the passed in defer_ops and to finish up any work that
* doesn't fit. We need to reserve enough blocks to handle a
* full btree split on either end of the refcount range.
*/
@@ -452,12 +487,7 @@
mp->m_refc_maxlevels * 2, 0, XFS_TRANS_RESERVE, &tp);
if (error)
return error;
- /*
- * Recovery stashes all deferred ops during intent processing and
- * finishes them on completion. Transfer current dfops state to this
- * transaction and transfer the result back before we return.
- */
- xfs_defer_move(tp, parent_tp);
+
cudp = xfs_trans_get_cud(tp, cuip);
for (i = 0; i < cuip->cui_format.cui_nextents; i++) {
@@ -471,6 +501,7 @@
type = refc_type;
break;
default:
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
error = -EFSCORRUPTED;
goto abort_error;
}
@@ -490,39 +521,174 @@
irec.br_blockcount = new_len;
switch (type) {
case XFS_REFCOUNT_INCREASE:
- error = xfs_refcount_increase_extent(tp, &irec);
+ xfs_refcount_increase_extent(tp, &irec);
break;
case XFS_REFCOUNT_DECREASE:
- error = xfs_refcount_decrease_extent(tp, &irec);
+ xfs_refcount_decrease_extent(tp, &irec);
break;
case XFS_REFCOUNT_ALLOC_COW:
- error = xfs_refcount_alloc_cow_extent(tp,
+ xfs_refcount_alloc_cow_extent(tp,
irec.br_startblock,
irec.br_blockcount);
break;
case XFS_REFCOUNT_FREE_COW:
- error = xfs_refcount_free_cow_extent(tp,
+ xfs_refcount_free_cow_extent(tp,
irec.br_startblock,
irec.br_blockcount);
break;
default:
ASSERT(0);
}
- if (error)
- goto abort_error;
requeue_only = true;
}
}
xfs_refcount_finish_one_cleanup(tp, rcur, error);
- set_bit(XFS_CUI_RECOVERED, &cuip->cui_flags);
- xfs_defer_move(parent_tp, tp);
- error = xfs_trans_commit(tp);
- return error;
+ return xfs_defer_ops_capture_and_commit(tp, NULL, capture_list);
abort_error:
xfs_refcount_finish_one_cleanup(tp, rcur, error);
- xfs_defer_move(parent_tp, tp);
xfs_trans_cancel(tp);
return error;
}
+
+STATIC bool
+xfs_cui_item_match(
+ struct xfs_log_item *lip,
+ uint64_t intent_id)
+{
+ return CUI_ITEM(lip)->cui_format.cui_id == intent_id;
+}
+
+/* Relog an intent item to push the log tail forward. */
+static struct xfs_log_item *
+xfs_cui_item_relog(
+ struct xfs_log_item *intent,
+ struct xfs_trans *tp)
+{
+ struct xfs_cud_log_item *cudp;
+ struct xfs_cui_log_item *cuip;
+ struct xfs_phys_extent *extp;
+ unsigned int count;
+
+ count = CUI_ITEM(intent)->cui_format.cui_nextents;
+ extp = CUI_ITEM(intent)->cui_format.cui_extents;
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ cudp = xfs_trans_get_cud(tp, CUI_ITEM(intent));
+ set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
+
+ cuip = xfs_cui_init(tp->t_mountp, count);
+ memcpy(cuip->cui_format.cui_extents, extp, count * sizeof(*extp));
+ atomic_set(&cuip->cui_next_extent, count);
+ xfs_trans_add_item(tp, &cuip->cui_item);
+ set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
+ return &cuip->cui_item;
+}
+
+static const struct xfs_item_ops xfs_cui_item_ops = {
+ .iop_size = xfs_cui_item_size,
+ .iop_format = xfs_cui_item_format,
+ .iop_unpin = xfs_cui_item_unpin,
+ .iop_release = xfs_cui_item_release,
+ .iop_recover = xfs_cui_item_recover,
+ .iop_match = xfs_cui_item_match,
+ .iop_relog = xfs_cui_item_relog,
+};
+
+/*
+ * Copy an CUI format buffer from the given buf, and into the destination
+ * CUI format structure. The CUI/CUD items were designed not to need any
+ * special alignment handling.
+ */
+static int
+xfs_cui_copy_format(
+ struct xfs_log_iovec *buf,
+ struct xfs_cui_log_format *dst_cui_fmt)
+{
+ struct xfs_cui_log_format *src_cui_fmt;
+ uint len;
+
+ src_cui_fmt = buf->i_addr;
+ len = xfs_cui_log_format_sizeof(src_cui_fmt->cui_nextents);
+
+ if (buf->i_len == len) {
+ memcpy(dst_cui_fmt, src_cui_fmt, len);
+ return 0;
+ }
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, NULL);
+ return -EFSCORRUPTED;
+}
+
+/*
+ * This routine is called to create an in-core extent refcount update
+ * item from the cui format structure which was logged on disk.
+ * It allocates an in-core cui, copies the extents from the format
+ * structure into it, and adds the cui to the AIL with the given
+ * LSN.
+ */
+STATIC int
+xlog_recover_cui_commit_pass2(
+ struct xlog *log,
+ struct list_head *buffer_list,
+ struct xlog_recover_item *item,
+ xfs_lsn_t lsn)
+{
+ int error;
+ struct xfs_mount *mp = log->l_mp;
+ struct xfs_cui_log_item *cuip;
+ struct xfs_cui_log_format *cui_formatp;
+
+ cui_formatp = item->ri_buf[0].i_addr;
+
+ cuip = xfs_cui_init(mp, cui_formatp->cui_nextents);
+ error = xfs_cui_copy_format(&item->ri_buf[0], &cuip->cui_format);
+ if (error) {
+ xfs_cui_item_free(cuip);
+ return error;
+ }
+ atomic_set(&cuip->cui_next_extent, cui_formatp->cui_nextents);
+ /*
+ * Insert the intent into the AIL directly and drop one reference so
+ * that finishing or canceling the work will drop the other.
+ */
+ xfs_trans_ail_insert(log->l_ailp, &cuip->cui_item, lsn);
+ xfs_cui_release(cuip);
+ return 0;
+}
+
+const struct xlog_recover_item_ops xlog_cui_item_ops = {
+ .item_type = XFS_LI_CUI,
+ .commit_pass2 = xlog_recover_cui_commit_pass2,
+};
+
+/*
+ * This routine is called when an CUD format structure is found in a committed
+ * transaction in the log. Its purpose is to cancel the corresponding CUI if it
+ * was still in the log. To do this it searches the AIL for the CUI with an id
+ * equal to that in the CUD format structure. If we find it we drop the CUD
+ * reference, which removes the CUI from the AIL and frees it.
+ */
+STATIC int
+xlog_recover_cud_commit_pass2(
+ struct xlog *log,
+ struct list_head *buffer_list,
+ struct xlog_recover_item *item,
+ xfs_lsn_t lsn)
+{
+ struct xfs_cud_log_format *cud_formatp;
+
+ cud_formatp = item->ri_buf[0].i_addr;
+ if (item->ri_buf[0].i_len != sizeof(struct xfs_cud_log_format)) {
+ XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, log->l_mp);
+ return -EFSCORRUPTED;
+ }
+
+ xlog_recover_release_intent(log, XFS_LI_CUI, cud_formatp->cud_cui_id);
+ return 0;
+}
+
+const struct xlog_recover_item_ops xlog_cud_item_ops = {
+ .item_type = XFS_LI_CUD,
+ .commit_pass2 = xlog_recover_cud_commit_pass2,
+};
--
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