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Diffstat (limited to 'fs/xfs/xfs_refcount_item.c')
-rw-r--r--fs/xfs/xfs_refcount_item.c357
1 files changed, 211 insertions, 146 deletions
diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index fce38b56b962..d8288aa0670a 100644
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -14,7 +14,6 @@
#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"
@@ -95,15 +94,6 @@ xfs_cui_item_format(
}
/*
- * 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
@@ -122,71 +112,22 @@ xfs_cui_item_unpin(
}
/*
- * 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,
+ .iop_release = xfs_cui_item_release,
};
/*
@@ -254,126 +195,250 @@ xfs_cud_item_format(
}
/*
- * Pinning has no meaning for an cud item, so just return.
+ * 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_pin(
+xfs_cud_item_release(
struct xfs_log_item *lip)
{
+ struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
+
+ xfs_cui_release(cudp->cud_cuip);
+ kmem_zone_free(xfs_cud_zone, cudp);
}
-/*
- * 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)
+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_release = xfs_cud_item_release,
+};
+
+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;
+
+ cudp = kmem_zone_zalloc(xfs_cud_zone, KM_SLEEP);
+ 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;
}
/*
- * 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.
+ * 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 uint
-xfs_cud_item_push(
- struct xfs_log_item *lip,
- struct list_head *buffer_list)
+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)
{
- return XFS_ITEM_PINNED;
+ 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;
}
-/*
- * 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(
- struct xfs_log_item *lip)
+/* Sort refcount intents by AG. */
+static int
+xfs_refcount_update_diff_items(
+ void *priv,
+ struct list_head *a,
+ struct list_head *b)
{
- struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
+ 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);
+}
- if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
- xfs_cui_release(cudp->cud_cuip);
- kmem_zone_free(xfs_cud_zone, cudp);
+/* Get an CUI. */
+STATIC void *
+xfs_refcount_update_create_intent(
+ struct xfs_trans *tp,
+ unsigned int count)
+{
+ struct xfs_cui_log_item *cuip;
+
+ ASSERT(tp != NULL);
+ ASSERT(count > 0);
+
+ cuip = xfs_cui_init(tp->t_mountp, count);
+ ASSERT(cuip != NULL);
+
+ /*
+ * Get a log_item_desc to point at the new item.
+ */
+ xfs_trans_add_item(tp, &cuip->cui_item);
+ return cuip;
+}
+
+/* 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);
}
}
-/*
- * 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)
+/* Log refcount updates in the intent item. */
+STATIC void
+xfs_refcount_update_log_item(
+ struct xfs_trans *tp,
+ void *intent,
+ struct list_head *item)
{
- struct xfs_cud_log_item *cudp = CUD_ITEM(lip);
+ struct xfs_cui_log_item *cuip = intent;
+ struct xfs_refcount_intent *refc;
+ uint next_extent;
+ struct xfs_phys_extent *ext;
+
+ refc = container_of(item, struct xfs_refcount_intent, ri_list);
+
+ tp->t_flags |= XFS_TRANS_DIRTY;
+ set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
/*
- * 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).
+ * 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.
*/
- xfs_cui_release(cudp->cud_cuip);
- kmem_zone_free(xfs_cud_zone, cudp);
+ 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);
+}
- return (xfs_lsn_t)-1;
+/* Get an CUD so we can process all the deferred refcount updates. */
+STATIC void *
+xfs_refcount_update_create_done(
+ struct xfs_trans *tp,
+ void *intent,
+ unsigned int count)
+{
+ return xfs_trans_get_cud(tp, intent);
}
-/*
- * 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)
+/* Process a deferred refcount update. */
+STATIC int
+xfs_refcount_update_finish_item(
+ struct xfs_trans *tp,
+ struct list_head *item,
+ void *done_item,
+ void **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, done_item,
+ refc->ri_type,
+ refc->ri_startblock,
+ refc->ri_blockcount,
+ &new_fsb, &new_aglen,
+ (struct xfs_btree_cur **)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;
}
-/*
- * This is the ops vector shared by all cud log items.
- */
-static const struct xfs_item_ops xfs_cud_item_ops = {
- .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,
-};
+/* Clean up after processing deferred refcounts. */
+STATIC void
+xfs_refcount_update_finish_cleanup(
+ struct xfs_trans *tp,
+ void *state,
+ int error)
+{
+ struct xfs_btree_cur *rcur = state;
-/*
- * Allocate and initialize an cud item with the given number of extents.
- */
-struct xfs_cud_log_item *
-xfs_cud_init(
- struct xfs_mount *mp,
- struct xfs_cui_log_item *cuip)
+ xfs_refcount_finish_one_cleanup(tp, rcur, error);
+}
+/* Abort all pending CUIs. */
+STATIC void
+xfs_refcount_update_abort_intent(
+ void *intent)
{
- struct xfs_cud_log_item *cudp;
+ xfs_cui_release(intent);
+}
- 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->cud_cuip = cuip;
- cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
+/* Cancel a deferred refcount update. */
+STATIC void
+xfs_refcount_update_cancel_item(
+ struct list_head *item)
+{
+ struct xfs_refcount_intent *refc;
- return cudp;
+ 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,
+ .diff_items = xfs_refcount_update_diff_items,
+ .create_intent = xfs_refcount_update_create_intent,
+ .abort_intent = xfs_refcount_update_abort_intent,
+ .log_item = xfs_refcount_update_log_item,
+ .create_done = xfs_refcount_update_create_done,
+ .finish_item = xfs_refcount_update_finish_item,
+ .finish_cleanup = xfs_refcount_update_finish_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.