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Diffstat (limited to 'fs/xfs/libxfs/xfs_alloc.c')
-rw-r--r--fs/xfs/libxfs/xfs_alloc.c116
1 files changed, 105 insertions, 11 deletions
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index 100ab5931b..3bd0a33fee 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -246,11 +246,9 @@ xfs_alloc_btrec_to_irec(
/* Simple checks for free space records. */
xfs_failaddr_t
xfs_alloc_check_irec(
- struct xfs_btree_cur *cur,
- const struct xfs_alloc_rec_incore *irec)
+ struct xfs_perag *pag,
+ const struct xfs_alloc_rec_incore *irec)
{
- struct xfs_perag *pag = cur->bc_ag.pag;
-
if (irec->ar_blockcount == 0)
return __this_address;
@@ -299,7 +297,7 @@ xfs_alloc_get_rec(
return error;
xfs_alloc_btrec_to_irec(rec, &irec);
- fa = xfs_alloc_check_irec(cur, &irec);
+ fa = xfs_alloc_check_irec(cur->bc_ag.pag, &irec);
if (fa)
return xfs_alloc_complain_bad_rec(cur, fa, &irec);
@@ -2514,7 +2512,7 @@ xfs_defer_agfl_block(
trace_xfs_agfl_free_defer(mp, agno, 0, agbno, 1);
xfs_extent_free_get_group(mp, xefi);
- xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_AGFL_FREE, &xefi->xefi_list);
+ xfs_defer_add(tp, &xefi->xefi_list, &xfs_agfl_free_defer_type);
return 0;
}
@@ -2522,14 +2520,15 @@ xfs_defer_agfl_block(
* Add the extent to the list of extents to be free at transaction end.
* The list is maintained sorted (by block number).
*/
-int
-__xfs_free_extent_later(
+static int
+xfs_defer_extent_free(
struct xfs_trans *tp,
xfs_fsblock_t bno,
xfs_filblks_t len,
const struct xfs_owner_info *oinfo,
enum xfs_ag_resv_type type,
- bool skip_discard)
+ bool skip_discard,
+ struct xfs_defer_pending **dfpp)
{
struct xfs_extent_free_item *xefi;
struct xfs_mount *mp = tp->t_mountp;
@@ -2577,10 +2576,105 @@ __xfs_free_extent_later(
XFS_FSB_TO_AGBNO(tp->t_mountp, bno), len);
xfs_extent_free_get_group(mp, xefi);
- xfs_defer_add(tp, XFS_DEFER_OPS_TYPE_FREE, &xefi->xefi_list);
+ *dfpp = xfs_defer_add(tp, &xefi->xefi_list, &xfs_extent_free_defer_type);
return 0;
}
+int
+xfs_free_extent_later(
+ struct xfs_trans *tp,
+ xfs_fsblock_t bno,
+ xfs_filblks_t len,
+ const struct xfs_owner_info *oinfo,
+ enum xfs_ag_resv_type type,
+ bool skip_discard)
+{
+ struct xfs_defer_pending *dontcare = NULL;
+
+ return xfs_defer_extent_free(tp, bno, len, oinfo, type, skip_discard,
+ &dontcare);
+}
+
+/*
+ * Set up automatic freeing of unwritten space in the filesystem.
+ *
+ * This function attached a paused deferred extent free item to the
+ * transaction. Pausing means that the EFI will be logged in the next
+ * transaction commit, but the pending EFI will not be finished until the
+ * pending item is unpaused.
+ *
+ * If the system goes down after the EFI has been persisted to the log but
+ * before the pending item is unpaused, log recovery will find the EFI, fail to
+ * find the EFD, and free the space.
+ *
+ * If the pending item is unpaused, the next transaction commit will log an EFD
+ * without freeing the space.
+ *
+ * Caller must ensure that the tp, fsbno, len, oinfo, and resv flags of the
+ * @args structure are set to the relevant values.
+ */
+int
+xfs_alloc_schedule_autoreap(
+ const struct xfs_alloc_arg *args,
+ bool skip_discard,
+ struct xfs_alloc_autoreap *aarp)
+{
+ int error;
+
+ error = xfs_defer_extent_free(args->tp, args->fsbno, args->len,
+ &args->oinfo, args->resv, skip_discard, &aarp->dfp);
+ if (error)
+ return error;
+
+ xfs_defer_item_pause(args->tp, aarp->dfp);
+ return 0;
+}
+
+/*
+ * Cancel automatic freeing of unwritten space in the filesystem.
+ *
+ * Earlier, we created a paused deferred extent free item and attached it to
+ * this transaction so that we could automatically roll back a new space
+ * allocation if the system went down. Now we want to cancel the paused work
+ * item by marking the EFI stale so we don't actually free the space, unpausing
+ * the pending item and logging an EFD.
+ *
+ * The caller generally should have already mapped the space into the ondisk
+ * filesystem. If the reserved space was partially used, the caller must call
+ * xfs_free_extent_later to create a new EFI to free the unused space.
+ */
+void
+xfs_alloc_cancel_autoreap(
+ struct xfs_trans *tp,
+ struct xfs_alloc_autoreap *aarp)
+{
+ struct xfs_defer_pending *dfp = aarp->dfp;
+ struct xfs_extent_free_item *xefi;
+
+ if (!dfp)
+ return;
+
+ list_for_each_entry(xefi, &dfp->dfp_work, xefi_list)
+ xefi->xefi_flags |= XFS_EFI_CANCELLED;
+
+ xfs_defer_item_unpause(tp, dfp);
+}
+
+/*
+ * Commit automatic freeing of unwritten space in the filesystem.
+ *
+ * This unpauses an earlier _schedule_autoreap and commits to freeing the
+ * allocated space. Call this if none of the reserved space was used.
+ */
+void
+xfs_alloc_commit_autoreap(
+ struct xfs_trans *tp,
+ struct xfs_alloc_autoreap *aarp)
+{
+ if (aarp->dfp)
+ xfs_defer_item_unpause(tp, aarp->dfp);
+}
+
#ifdef DEBUG
/*
* Check if an AGF has a free extent record whose length is equal to
@@ -3848,7 +3942,7 @@ xfs_alloc_query_range_helper(
xfs_failaddr_t fa;
xfs_alloc_btrec_to_irec(rec, &irec);
- fa = xfs_alloc_check_irec(cur, &irec);
+ fa = xfs_alloc_check_irec(cur->bc_ag.pag, &irec);
if (fa)
return xfs_alloc_complain_bad_rec(cur, fa, &irec);