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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /fs/xfs/libxfs/xfs_defer.h
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/xfs/libxfs/xfs_defer.h')
-rw-r--r--fs/xfs/libxfs/xfs_defer.h131
1 files changed, 131 insertions, 0 deletions
diff --git a/fs/xfs/libxfs/xfs_defer.h b/fs/xfs/libxfs/xfs_defer.h
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+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * Copyright (C) 2016 Oracle. All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_DEFER_H__
+#define __XFS_DEFER_H__
+
+struct xfs_btree_cur;
+struct xfs_defer_op_type;
+struct xfs_defer_capture;
+
+/*
+ * Header for deferred operation list.
+ */
+enum xfs_defer_ops_type {
+ XFS_DEFER_OPS_TYPE_BMAP,
+ XFS_DEFER_OPS_TYPE_REFCOUNT,
+ XFS_DEFER_OPS_TYPE_RMAP,
+ XFS_DEFER_OPS_TYPE_FREE,
+ XFS_DEFER_OPS_TYPE_AGFL_FREE,
+ XFS_DEFER_OPS_TYPE_ATTR,
+ XFS_DEFER_OPS_TYPE_MAX,
+};
+
+/*
+ * Save a log intent item and a list of extents, so that we can replay
+ * whatever action had to happen to the extent list and file the log done
+ * item.
+ */
+struct xfs_defer_pending {
+ struct list_head dfp_list; /* pending items */
+ struct list_head dfp_work; /* work items */
+ struct xfs_log_item *dfp_intent; /* log intent item */
+ struct xfs_log_item *dfp_done; /* log done item */
+ unsigned int dfp_count; /* # extent items */
+ enum xfs_defer_ops_type dfp_type;
+};
+
+void xfs_defer_add(struct xfs_trans *tp, enum xfs_defer_ops_type type,
+ struct list_head *h);
+int xfs_defer_finish_noroll(struct xfs_trans **tp);
+int xfs_defer_finish(struct xfs_trans **tp);
+void xfs_defer_cancel(struct xfs_trans *);
+void xfs_defer_move(struct xfs_trans *dtp, struct xfs_trans *stp);
+
+/* Description of a deferred type. */
+struct xfs_defer_op_type {
+ struct xfs_log_item *(*create_intent)(struct xfs_trans *tp,
+ struct list_head *items, unsigned int count, bool sort);
+ void (*abort_intent)(struct xfs_log_item *intent);
+ struct xfs_log_item *(*create_done)(struct xfs_trans *tp,
+ struct xfs_log_item *intent, unsigned int count);
+ int (*finish_item)(struct xfs_trans *tp, struct xfs_log_item *done,
+ struct list_head *item, struct xfs_btree_cur **state);
+ void (*finish_cleanup)(struct xfs_trans *tp,
+ struct xfs_btree_cur *state, int error);
+ void (*cancel_item)(struct list_head *item);
+ unsigned int max_items;
+};
+
+extern const struct xfs_defer_op_type xfs_bmap_update_defer_type;
+extern const struct xfs_defer_op_type xfs_refcount_update_defer_type;
+extern const struct xfs_defer_op_type xfs_rmap_update_defer_type;
+extern const struct xfs_defer_op_type xfs_extent_free_defer_type;
+extern const struct xfs_defer_op_type xfs_agfl_free_defer_type;
+extern const struct xfs_defer_op_type xfs_attr_defer_type;
+
+
+/*
+ * Deferred operation item relogging limits.
+ */
+#define XFS_DEFER_OPS_NR_INODES 2 /* join up to two inodes */
+#define XFS_DEFER_OPS_NR_BUFS 2 /* join up to two buffers */
+
+/* Resources that must be held across a transaction roll. */
+struct xfs_defer_resources {
+ /* held buffers */
+ struct xfs_buf *dr_bp[XFS_DEFER_OPS_NR_BUFS];
+
+ /* inodes with no unlock flags */
+ struct xfs_inode *dr_ip[XFS_DEFER_OPS_NR_INODES];
+
+ /* number of held buffers */
+ unsigned short dr_bufs;
+
+ /* bitmap of ordered buffers */
+ unsigned short dr_ordered;
+
+ /* number of held inodes */
+ unsigned short dr_inos;
+};
+
+/*
+ * This structure enables a dfops user to detach the chain of deferred
+ * operations from a transaction so that they can be continued later.
+ */
+struct xfs_defer_capture {
+ /* List of other capture structures. */
+ struct list_head dfc_list;
+
+ /* Deferred ops state saved from the transaction. */
+ struct list_head dfc_dfops;
+ unsigned int dfc_tpflags;
+
+ /* Block reservations for the data and rt devices. */
+ unsigned int dfc_blkres;
+ unsigned int dfc_rtxres;
+
+ /* Log reservation saved from the transaction. */
+ unsigned int dfc_logres;
+
+ struct xfs_defer_resources dfc_held;
+};
+
+/*
+ * Functions to capture a chain of deferred operations and continue them later.
+ * This doesn't normally happen except log recovery.
+ */
+int xfs_defer_ops_capture_and_commit(struct xfs_trans *tp,
+ struct list_head *capture_list);
+void xfs_defer_ops_continue(struct xfs_defer_capture *d, struct xfs_trans *tp,
+ struct xfs_defer_resources *dres);
+void xfs_defer_ops_capture_free(struct xfs_mount *mp,
+ struct xfs_defer_capture *d);
+void xfs_defer_resources_rele(struct xfs_defer_resources *dres);
+
+int __init xfs_defer_init_item_caches(void);
+void xfs_defer_destroy_item_caches(void);
+
+#endif /* __XFS_DEFER_H__ */