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/* SPDX-License-Identifier: GPL-2.0-or-later */
/*
* Copyright (C) 2021 Oracle. All Rights Reserved.
* Author: Darrick J. Wong <djwong@kernel.org>
*/
#ifndef __XFS_SWAPEXT_H_
#define __XFS_SWAPEXT_H_ 1
/*
* In-core information about an extent swap request between ranges of two
* inodes.
*/
struct xfs_swapext_intent {
/* List of other incore deferred work. */
struct list_head sxi_list;
/* Inodes participating in the operation. */
struct xfs_inode *sxi_ip1;
struct xfs_inode *sxi_ip2;
/* File offset range information. */
xfs_fileoff_t sxi_startoff1;
xfs_fileoff_t sxi_startoff2;
xfs_filblks_t sxi_blockcount;
/* Set these file sizes after the operation, unless negative. */
xfs_fsize_t sxi_isize1;
xfs_fsize_t sxi_isize2;
/* XFS_SWAP_EXT_* log operation flags */
uint64_t sxi_flags;
};
static inline int
xfs_swapext_whichfork(const struct xfs_swapext_intent *sxi)
{
if (sxi->sxi_flags & XFS_SWAP_EXT_ATTR_FORK)
return XFS_ATTR_FORK;
return XFS_DATA_FORK;
}
/* Parameters for a swapext request. */
struct xfs_swapext_req {
/* Inodes participating in the operation. */
struct xfs_inode *ip1;
struct xfs_inode *ip2;
/* File offset range information. */
xfs_fileoff_t startoff1;
xfs_fileoff_t startoff2;
xfs_filblks_t blockcount;
/* Data or attr fork? */
int whichfork;
/* XFS_SWAP_REQ_* operation flags */
unsigned int req_flags;
};
/* Set the file sizes when finished. */
#define XFS_SWAP_REQ_SET_SIZES (1U << 1)
/* Do not swap any part of the range where file1's mapping is a hole. */
#define XFS_SWAP_REQ_SKIP_FILE1_HOLES (1U << 2)
/* Try to convert inode2's fork to local format, if possible. */
#define XFS_SWAP_REQ_FILE2_CVT_SF (1U << 3)
#define XFS_SWAP_REQ_FLAGS (XFS_SWAP_REQ_SET_SIZES | \
XFS_SWAP_REQ_SKIP_FILE1_HOLES | \
XFS_SWAP_REQ_FILE2_CVT_SF)
#define XFS_SWAP_REQ_STRINGS \
{ XFS_SWAP_REQ_SET_SIZES, "SETSIZES" }, \
{ XFS_SWAP_REQ_SKIP_FILE1_HOLES, "SKIP_FILE1_HOLES" }, \
{ XFS_SWAP_REQ_FILE2_CVT_SF, "INO2_SHORTFORM" }
/* Estimated resource requirements for a swapext operation. */
struct xfs_swapext_res {
xfs_filblks_t ip1_bcount;
xfs_filblks_t ip2_bcount;
xfs_filblks_t ip1_rtbcount;
xfs_filblks_t ip2_rtbcount;
unsigned long long resblks;
unsigned int nr_exchanges;
};
unsigned int xfs_swapext_reflink_prep(const struct xfs_swapext_req *req);
void xfs_swapext_reflink_finish(struct xfs_trans *tp,
const struct xfs_swapext_req *req, unsigned int reflink_state);
int xfs_swapext_estimate_overhead(const struct xfs_swapext_req *req,
struct xfs_swapext_res *res);
int xfs_swapext_estimate(const struct xfs_swapext_req *req,
struct xfs_swapext_res *res);
struct xfs_swapext_intent *xfs_swapext_init_intent(
const struct xfs_swapext_req *req);
void xfs_swapext_schedule(struct xfs_trans *tp,
struct xfs_swapext_intent *sxi);
int xfs_swapext_finish_one(struct xfs_trans *tp,
struct xfs_swapext_intent *sxi);
int xfs_swapext_check_extents(struct xfs_mount *mp,
const struct xfs_swapext_req *req);
int xfs_swapext(struct xfs_trans **tpp, const struct xfs_swapext_req *req);
#endif /* __XFS_SWAPEXT_H_ */
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