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https://github.com/torvalds/linux
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5773f7f82b
Make the necessary alterations to the extended attribute log intent item ondisk format so that we can log parent pointer operations. This requires the creation of new opcodes specific to parent pointers, and a new four-argument replace operation to handle renames. At this point this part of the patchset has changed so much from what Allison original wrote that I no longer think her SoB applies. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
65 lines
2 KiB
C
65 lines
2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later
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*
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* Copyright (C) 2022 Oracle. All Rights Reserved.
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* Author: Allison Henderson <allison.henderson@oracle.com>
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*/
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#ifndef __XFS_ATTR_ITEM_H__
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#define __XFS_ATTR_ITEM_H__
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/* kernel only ATTRI/ATTRD definitions */
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struct xfs_mount;
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struct kmem_zone;
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struct xfs_attri_log_nameval {
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struct xfs_log_iovec name;
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struct xfs_log_iovec new_name; /* PPTR_REPLACE only */
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struct xfs_log_iovec value;
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struct xfs_log_iovec new_value; /* PPTR_REPLACE only */
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refcount_t refcount;
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/* name and value follow the end of this struct */
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};
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/*
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* This is the "attr intention" log item. It is used to log the fact that some
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* extended attribute operations need to be processed. An operation is
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* currently either a set or remove. Set or remove operations are described by
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* the xfs_attr_intent which may be logged to this intent.
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*
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* During a normal attr operation, name and value point to the name and value
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* fields of the caller's xfs_da_args structure. During a recovery, the name
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* and value buffers are copied from the log, and stored in a trailing buffer
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* attached to the xfs_attr_intent until they are committed. They are freed
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* when the xfs_attr_intent itself is freed when the work is done.
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*/
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struct xfs_attri_log_item {
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struct xfs_log_item attri_item;
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atomic_t attri_refcount;
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struct xfs_attri_log_nameval *attri_nameval;
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struct xfs_attri_log_format attri_format;
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};
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/*
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* This is the "attr done" log item. It is used to log the fact that some attrs
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* earlier mentioned in an attri item have been freed.
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*/
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struct xfs_attrd_log_item {
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struct xfs_log_item attrd_item;
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struct xfs_attri_log_item *attrd_attrip;
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struct xfs_attrd_log_format attrd_format;
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};
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extern struct kmem_cache *xfs_attri_cache;
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extern struct kmem_cache *xfs_attrd_cache;
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enum xfs_attr_defer_op {
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XFS_ATTR_DEFER_SET,
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XFS_ATTR_DEFER_REMOVE,
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XFS_ATTR_DEFER_REPLACE,
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};
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void xfs_attr_defer_add(struct xfs_da_args *args, enum xfs_attr_defer_op op);
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#endif /* __XFS_ATTR_ITEM_H__ */
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