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d9038d99fb
Changes the type of ntfs_inode::mft_no from unsigned long to u64 to safely handle the full 48-bit range without truncation risk, especially in preparation for broader VFS inode number type (i_ino:u64) and to improve consistency with ntfs driver practices. Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
92 lines
3.0 KiB
C
92 lines
3.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Defines for mft record handling in NTFS Linux kernel driver.
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*
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* Copyright (c) 2001-2004 Anton Altaparmakov
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*/
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#ifndef _LINUX_NTFS_MFT_H
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#define _LINUX_NTFS_MFT_H
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#include <linux/highmem.h>
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#include <linux/pagemap.h>
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#include "inode.h"
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struct mft_record *map_mft_record(struct ntfs_inode *ni);
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void unmap_mft_record(struct ntfs_inode *ni);
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struct mft_record *map_extent_mft_record(struct ntfs_inode *base_ni, u64 mref,
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struct ntfs_inode **ntfs_ino);
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static inline void unmap_extent_mft_record(struct ntfs_inode *ni)
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{
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unmap_mft_record(ni);
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}
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void __mark_mft_record_dirty(struct ntfs_inode *ni);
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/*
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* mark_mft_record_dirty - set the mft record and the page containing it dirty
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* @ni: ntfs inode describing the mapped mft record
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*
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* Set the mapped (extent) mft record of the (base or extent) ntfs inode @ni,
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* as well as the page containing the mft record, dirty. Also, mark the base
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* vfs inode dirty. This ensures that any changes to the mft record are
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* written out to disk.
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*
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* NOTE: Do not do anything if the mft record is already marked dirty.
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*/
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static inline void mark_mft_record_dirty(struct ntfs_inode *ni)
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{
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if (!NInoTestSetDirty(ni))
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__mark_mft_record_dirty(ni);
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}
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int ntfs_sync_mft_mirror(struct ntfs_volume *vol, const u64 mft_no,
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struct mft_record *m);
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int write_mft_record_nolock(struct ntfs_inode *ni, struct mft_record *m, int sync);
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/*
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* write_mft_record - write out a mapped (extent) mft record
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* @ni: ntfs inode describing the mapped (extent) mft record
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* @m: mapped (extent) mft record to write
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* @sync: if true, wait for i/o completion
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*
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* This is just a wrapper for write_mft_record_nolock() (see mft.c), which
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* locks the page for the duration of the write. This ensures that there are
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* no race conditions between writing the mft record via the dirty inode code
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* paths and via the page cache write back code paths or between writing
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* neighbouring mft records residing in the same page.
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*
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* Locking the page also serializes us against ->read_folio() if the page is not
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* uptodate.
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*
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* On success, clean the mft record and return 0. On error, leave the mft
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* record dirty and return -errno.
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*/
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static inline int write_mft_record(struct ntfs_inode *ni, struct mft_record *m, int sync)
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{
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struct folio *folio = ni->folio;
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int err;
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folio_lock(folio);
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err = write_mft_record_nolock(ni, m, sync);
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folio_unlock(folio);
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return err;
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}
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int ntfs_mft_record_alloc(struct ntfs_volume *vol, const int mode,
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struct ntfs_inode **ni, struct ntfs_inode *base_ni,
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struct mft_record **ni_mrec);
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int ntfs_mft_record_free(struct ntfs_volume *vol, struct ntfs_inode *ni);
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int ntfs_mft_records_write(const struct ntfs_volume *vol, const u64 mref,
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const s64 count, struct mft_record *b);
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int ntfs_mft_record_check(const struct ntfs_volume *vol, struct mft_record *m,
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u64 mft_no);
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int ntfs_mft_writepages(struct address_space *mapping,
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struct writeback_control *wbc);
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void ntfs_mft_mark_dirty(struct folio *folio);
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#endif /* _LINUX_NTFS_MFT_H */
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