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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-08-07 13:11:22 +0000 |
| commit | b20732900e4636a467c0183a47f7396700f5f743 (patch) | |
| tree | 42f079ff82e701ebcb76829974b4caca3e5b6798 /fs/btrfs/subpage.h | |
| parent | Adding upstream version 6.8.12. (diff) | |
| download | linux-b20732900e4636a467c0183a47f7396700f5f743.tar.xz linux-b20732900e4636a467c0183a47f7396700f5f743.zip | |
Adding upstream version 6.9.7.upstream/6.9.7
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/btrfs/subpage.h')
| -rw-r--r-- | fs/btrfs/subpage.h | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/fs/btrfs/subpage.h b/fs/btrfs/subpage.h index 793c2b314a..b6dc013b0f 100644 --- a/fs/btrfs/subpage.h +++ b/fs/btrfs/subpage.h @@ -4,6 +4,11 @@ #define BTRFS_SUBPAGE_H #include <linux/spinlock.h> +#include <linux/atomic.h> + +struct address_space; +struct folio; +struct btrfs_fs_info; /* * Extra info for subpapge bitmap. @@ -28,7 +33,7 @@ struct btrfs_subpage_info { unsigned int total_nr_bits; /* - * *_start indicates where the bitmap starts, the length is always + * *_offset indicates where the bitmap starts, the length is always * @bitmap_size, which is calculated from PAGE_SIZE / sectorsize. */ unsigned int uptodate_offset; @@ -36,6 +41,16 @@ struct btrfs_subpage_info { unsigned int writeback_offset; unsigned int ordered_offset; unsigned int checked_offset; + + /* + * For locked bitmaps, normally it's subpage representation for folio + * Locked flag, but metadata is different: + * + * - Metadata doesn't really lock the folio + * It's just to prevent page::private get cleared before the last + * end_page_read(). + */ + unsigned int locked_offset; }; /* @@ -93,10 +108,6 @@ void btrfs_subpage_start_reader(const struct btrfs_fs_info *fs_info, void btrfs_subpage_end_reader(const struct btrfs_fs_info *fs_info, struct folio *folio, u64 start, u32 len); -void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info, - struct folio *folio, u64 start, u32 len); -bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info, - struct folio *folio, u64 start, u32 len); int btrfs_folio_start_writer_lock(const struct btrfs_fs_info *fs_info, struct folio *folio, u64 start, u32 len); void btrfs_folio_end_writer_lock(const struct btrfs_fs_info *fs_info, |