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Diffstat (limited to 'fs/xfs/xfs_exchrange.h')
| -rw-r--r-- | fs/xfs/xfs_exchrange.h | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/fs/xfs/xfs_exchrange.h b/fs/xfs/xfs_exchrange.h new file mode 100644 index 000000000000..bc1298aba806 --- /dev/null +++ b/fs/xfs/xfs_exchrange.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Copyright (c) 2020-2024 Oracle. All Rights Reserved. + * Author: Darrick J. Wong <djwong@kernel.org> + */ +#ifndef __XFS_EXCHRANGE_H__ +#define __XFS_EXCHRANGE_H__ + +/* Update the mtime/cmtime of file1 and file2 */ +#define __XFS_EXCHANGE_RANGE_UPD_CMTIME1 (1ULL << 63) +#define __XFS_EXCHANGE_RANGE_UPD_CMTIME2 (1ULL << 62) + +/* Freshness check required */ +#define __XFS_EXCHANGE_RANGE_CHECK_FRESH2 (1ULL << 61) + +#define XFS_EXCHANGE_RANGE_PRIV_FLAGS (__XFS_EXCHANGE_RANGE_UPD_CMTIME1 | \ + __XFS_EXCHANGE_RANGE_UPD_CMTIME2 | \ + __XFS_EXCHANGE_RANGE_CHECK_FRESH2) + +struct xfs_exchrange { + struct file *file1; + struct file *file2; + + loff_t file1_offset; + loff_t file2_offset; + u64 length; + + u64 flags; /* XFS_EXCHANGE_RANGE flags */ + + /* file2 metadata for freshness checks */ + u64 file2_ino; + struct timespec64 file2_mtime; + struct timespec64 file2_ctime; + u32 file2_gen; +}; + +long xfs_ioc_exchange_range(struct file *file, + struct xfs_exchange_range __user *argp); +long xfs_ioc_start_commit(struct file *file, + struct xfs_commit_range __user *argp); +long xfs_ioc_commit_range(struct file *file, + struct xfs_commit_range __user *argp); + +struct xfs_exchmaps_req; + +void xfs_exchrange_ilock(struct xfs_trans *tp, struct xfs_inode *ip1, + struct xfs_inode *ip2); +void xfs_exchrange_iunlock(struct xfs_inode *ip1, struct xfs_inode *ip2); + +int xfs_exchrange_estimate(struct xfs_exchmaps_req *req); + +#endif /* __XFS_EXCHRANGE_H__ */ |