1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Defines for mft record handling in NTFS Linux kernel driver. 4 * 5 * Copyright (c) 2001-2004 Anton Altaparmakov 6 */ 7 8 #ifndef _LINUX_NTFS_MFT_H 9 #define _LINUX_NTFS_MFT_H 10 11 #include <linux/highmem.h> 12 #include <linux/pagemap.h> 13 14 #include "inode.h" 15 16 struct mft_record *map_mft_record(struct ntfs_inode *ni); 17 void unmap_mft_record(struct ntfs_inode *ni); 18 struct mft_record *map_extent_mft_record(struct ntfs_inode *base_ni, u64 mref, 19 struct ntfs_inode **ntfs_ino); 20 21 static inline void unmap_extent_mft_record(struct ntfs_inode *ni) 22 { 23 unmap_mft_record(ni); 24 } 25 26 void __mark_mft_record_dirty(struct ntfs_inode *ni); 27 28 /* 29 * mark_mft_record_dirty - set the mft record and the page containing it dirty 30 * @ni: ntfs inode describing the mapped mft record 31 * 32 * Set the mapped (extent) mft record of the (base or extent) ntfs inode @ni, 33 * as well as the page containing the mft record, dirty. Also, mark the base 34 * vfs inode dirty. This ensures that any changes to the mft record are 35 * written out to disk. 36 * 37 * NOTE: Do not do anything if the mft record is already marked dirty. 38 */ 39 static inline void mark_mft_record_dirty(struct ntfs_inode *ni) 40 { 41 if (!NInoTestSetDirty(ni)) 42 __mark_mft_record_dirty(ni); 43 } 44 45 int ntfs_sync_mft_mirror(struct ntfs_volume *vol, const u64 mft_no, 46 struct mft_record *m); 47 int write_mft_record_nolock(struct ntfs_inode *ni, struct mft_record *m, int sync); 48 49 /* 50 * write_mft_record - write out a mapped (extent) mft record 51 * @ni: ntfs inode describing the mapped (extent) mft record 52 * @m: mapped (extent) mft record to write 53 * @sync: if true, wait for i/o completion 54 * 55 * This is just a wrapper for write_mft_record_nolock() (see mft.c), which 56 * locks the page for the duration of the write. This ensures that there are 57 * no race conditions between writing the mft record via the dirty inode code 58 * paths and via the page cache write back code paths or between writing 59 * neighbouring mft records residing in the same page. 60 * 61 * Locking the page also serializes us against ->read_folio() if the page is not 62 * uptodate. 63 * 64 * On success, clean the mft record and return 0. On error, leave the mft 65 * record dirty and return -errno. 66 */ 67 static inline int write_mft_record(struct ntfs_inode *ni, struct mft_record *m, int sync) 68 { 69 struct folio *folio = ni->folio; 70 int err; 71 72 folio_lock(folio); 73 err = write_mft_record_nolock(ni, m, sync); 74 folio_unlock(folio); 75 76 return err; 77 } 78 79 int ntfs_mft_record_alloc(struct ntfs_volume *vol, const int mode, 80 struct ntfs_inode **ni, struct ntfs_inode *base_ni, 81 struct mft_record **ni_mrec); 82 int ntfs_mft_record_free(struct ntfs_volume *vol, struct ntfs_inode *ni); 83 int ntfs_mft_records_write(const struct ntfs_volume *vol, const u64 mref, 84 const s64 count, struct mft_record *b); 85 int ntfs_mft_record_check(const struct ntfs_volume *vol, struct mft_record *m, 86 u64 mft_no); 87 int ntfs_mft_writepages(struct address_space *mapping, 88 struct writeback_control *wbc); 89 void ntfs_mft_mark_dirty(struct folio *folio); 90 91 #endif /* _LINUX_NTFS_MFT_H */ 92