diff options
Diffstat (limited to 'fs/btrfs/subpage.h')
| -rw-r--r-- | fs/btrfs/subpage.h | 99 |
1 files changed, 53 insertions, 46 deletions
diff --git a/fs/btrfs/subpage.h b/fs/btrfs/subpage.h index 5cbf67ccbdeb..b6dc013b0fdc 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; }; /* @@ -73,71 +88,64 @@ enum btrfs_subpage_type { BTRFS_SUBPAGE_DATA, }; -bool btrfs_is_subpage(const struct btrfs_fs_info *fs_info, struct page *page); +bool btrfs_is_subpage(const struct btrfs_fs_info *fs_info, struct address_space *mapping); void btrfs_init_subpage_info(struct btrfs_subpage_info *subpage_info, u32 sectorsize); int btrfs_attach_subpage(const struct btrfs_fs_info *fs_info, - struct page *page, enum btrfs_subpage_type type); -void btrfs_detach_subpage(const struct btrfs_fs_info *fs_info, - struct page *page); + struct folio *folio, enum btrfs_subpage_type type); +void btrfs_detach_subpage(const struct btrfs_fs_info *fs_info, struct folio *folio); /* Allocate additional data where page represents more than one sector */ struct btrfs_subpage *btrfs_alloc_subpage(const struct btrfs_fs_info *fs_info, enum btrfs_subpage_type type); void btrfs_free_subpage(struct btrfs_subpage *subpage); -void btrfs_page_inc_eb_refs(const struct btrfs_fs_info *fs_info, - struct page *page); -void btrfs_page_dec_eb_refs(const struct btrfs_fs_info *fs_info, - struct page *page); +void btrfs_folio_inc_eb_refs(const struct btrfs_fs_info *fs_info, struct folio *folio); +void btrfs_folio_dec_eb_refs(const struct btrfs_fs_info *fs_info, struct folio *folio); void btrfs_subpage_start_reader(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); + struct folio *folio, u64 start, u32 len); void btrfs_subpage_end_reader(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); + struct folio *folio, u64 start, u32 len); -void btrfs_subpage_start_writer(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); -bool btrfs_subpage_end_and_test_writer(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); -int btrfs_page_start_writer_lock(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); -void btrfs_page_end_writer_lock(const struct btrfs_fs_info *fs_info, - struct page *page, 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, + struct folio *folio, u64 start, u32 len); /* * Template for subpage related operations. * - * btrfs_subpage_*() are for call sites where the page has subpage attached and - * the range is ensured to be inside the page. + * btrfs_subpage_*() are for call sites where the folio has subpage attached and + * the range is ensured to be inside the folio's single page. * - * btrfs_page_*() are for call sites where the page can either be subpage - * specific or regular page. The function will handle both cases. - * But the range still needs to be inside the page. + * btrfs_folio_*() are for call sites where the page can either be subpage + * specific or regular folios. The function will handle both cases. + * But the range still needs to be inside one single page. * - * btrfs_page_clamp_*() are similar to btrfs_page_*(), except the range doesn't + * btrfs_folio_clamp_*() are similar to btrfs_folio_*(), except the range doesn't * need to be inside the page. Those functions will truncate the range * automatically. */ #define DECLARE_BTRFS_SUBPAGE_OPS(name) \ void btrfs_subpage_set_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ + struct folio *folio, u64 start, u32 len); \ void btrfs_subpage_clear_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ + struct folio *folio, u64 start, u32 len); \ bool btrfs_subpage_test_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -void btrfs_page_set_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -void btrfs_page_clear_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -bool btrfs_page_test_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -void btrfs_page_clamp_set_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -void btrfs_page_clamp_clear_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); \ -bool btrfs_page_clamp_test_##name(const struct btrfs_fs_info *fs_info, \ - struct page *page, u64 start, u32 len); + struct folio *folio, u64 start, u32 len); \ +void btrfs_folio_set_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); \ +void btrfs_folio_clear_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); \ +bool btrfs_folio_test_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); \ +void btrfs_folio_clamp_set_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); \ +void btrfs_folio_clamp_clear_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); \ +bool btrfs_folio_clamp_test_##name(const struct btrfs_fs_info *fs_info, \ + struct folio *folio, u64 start, u32 len); DECLARE_BTRFS_SUBPAGE_OPS(uptodate); DECLARE_BTRFS_SUBPAGE_OPS(dirty); @@ -146,13 +154,12 @@ DECLARE_BTRFS_SUBPAGE_OPS(ordered); DECLARE_BTRFS_SUBPAGE_OPS(checked); bool btrfs_subpage_clear_and_test_dirty(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); + struct folio *folio, u64 start, u32 len); -void btrfs_page_assert_not_dirty(const struct btrfs_fs_info *fs_info, - struct page *page); -void btrfs_page_unlock_writer(struct btrfs_fs_info *fs_info, struct page *page, - u64 start, u32 len); +void btrfs_folio_assert_not_dirty(const struct btrfs_fs_info *fs_info, struct folio *folio); +void btrfs_folio_unlock_writer(struct btrfs_fs_info *fs_info, + struct folio *folio, u64 start, u32 len); void __cold btrfs_subpage_dump_bitmap(const struct btrfs_fs_info *fs_info, - struct page *page, u64 start, u32 len); + struct folio *folio, u64 start, u32 len); #endif |