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Due to resource acquisition rules, we have to create the ondisk temporary files used to stage a filesystem repair before we can acquire a reference to the inode that we actually want to repair. Therefore, we do not know at tempfile creation time whether the tempfile will belong to the regular directory tree or the metadata directory tree. This distinction becomes important when the swapext code tries to figure out the quota accounting of the two files whose mappings are being swapped. The swapext code assumes that accounting updates are required for a file if dqattach attaches dquots. Metadir files are never accounted in quota, which means that swapext must not update the quota accounting when swapping in a repaired directory/xattr/rtbitmap structure. Prior to the swapext call, therefore, both files must be marked as METADIR for dqattach so that dqattach will ignore them. Add support for a repair tempfile to be switched to the metadir tree and switched back before being released so that ifree will just free the file. Signed-off-by: Darrick J. Wong <djwong@kernel.org> Reviewed-by: Christoph Hellwig <hch@lst.de>
52 lines
1.7 KiB
C
52 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright (c) 2021-2024 Oracle. All Rights Reserved.
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* Author: Darrick J. Wong <djwong@kernel.org>
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*/
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#ifndef __XFS_SCRUB_TEMPFILE_H__
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#define __XFS_SCRUB_TEMPFILE_H__
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#ifdef CONFIG_XFS_ONLINE_REPAIR
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int xrep_tempfile_create(struct xfs_scrub *sc, uint16_t mode);
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void xrep_tempfile_rele(struct xfs_scrub *sc);
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int xrep_tempfile_adjust_directory_tree(struct xfs_scrub *sc);
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bool xrep_tempfile_iolock_nowait(struct xfs_scrub *sc);
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int xrep_tempfile_iolock_polled(struct xfs_scrub *sc);
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void xrep_tempfile_iounlock(struct xfs_scrub *sc);
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void xrep_tempfile_ilock(struct xfs_scrub *sc);
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bool xrep_tempfile_ilock_nowait(struct xfs_scrub *sc);
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void xrep_tempfile_iunlock(struct xfs_scrub *sc);
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void xrep_tempfile_iunlock_both(struct xfs_scrub *sc);
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void xrep_tempfile_ilock_both(struct xfs_scrub *sc);
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int xrep_tempfile_prealloc(struct xfs_scrub *sc, xfs_fileoff_t off,
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xfs_filblks_t len);
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enum xfs_blft;
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typedef int (*xrep_tempfile_copyin_fn)(struct xfs_scrub *sc,
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struct xfs_buf *bp, void *data);
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int xrep_tempfile_copyin(struct xfs_scrub *sc, xfs_fileoff_t off,
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xfs_filblks_t len, xrep_tempfile_copyin_fn fn, void *data);
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int xrep_tempfile_set_isize(struct xfs_scrub *sc, unsigned long long isize);
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int xrep_tempfile_roll_trans(struct xfs_scrub *sc);
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void xrep_tempfile_copyout_local(struct xfs_scrub *sc, int whichfork);
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bool xrep_is_tempfile(const struct xfs_inode *ip);
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#else
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static inline void xrep_tempfile_iolock_both(struct xfs_scrub *sc)
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{
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xchk_ilock(sc, XFS_IOLOCK_EXCL);
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}
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# define xrep_is_tempfile(ip) (false)
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# define xrep_tempfile_adjust_directory_tree(sc) (0)
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# define xrep_tempfile_rele(sc)
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#endif /* CONFIG_XFS_ONLINE_REPAIR */
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#endif /* __XFS_SCRUB_TEMPFILE_H__ */
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