diff options
Diffstat (limited to 'fs/btrfs/subpage.c')
| -rw-r--r-- | fs/btrfs/subpage.c | 129 |
1 files changed, 85 insertions, 44 deletions
diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index 71a56aaac7ad..7e5ecc12b732 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -93,6 +93,9 @@ int btrfs_attach_subpage(const struct btrfs_fs_info *fs_info, { struct btrfs_subpage *subpage; + /* For metadata we don't support large folio yet. */ + ASSERT(!folio_test_large(folio)); + /* * We have cases like a dummy extent buffer page, which is not mapped * and doesn't need to be locked. @@ -134,7 +137,8 @@ struct btrfs_subpage *btrfs_alloc_subpage(const struct btrfs_fs_info *fs_info, ASSERT(fs_info->sectorsize < PAGE_SIZE); real_size = struct_size(ret, bitmaps, - BITS_TO_LONGS(btrfs_bitmap_nr_max * fs_info->sectors_per_page)); + BITS_TO_LONGS(btrfs_bitmap_nr_max * + (PAGE_SIZE >> fs_info->sectorsize_bits))); ret = kzalloc(real_size, GFP_NOFS); if (!ret) return ERR_PTR(-ENOMEM); @@ -211,11 +215,13 @@ static void btrfs_subpage_assert(const struct btrfs_fs_info *fs_info, #define subpage_calc_start_bit(fs_info, folio, name, start, len) \ ({ \ - unsigned int __start_bit; \ + unsigned int __start_bit; \ + const unsigned int blocks_per_folio = \ + btrfs_blocks_per_folio(fs_info, folio); \ \ btrfs_subpage_assert(fs_info, folio, start, len); \ __start_bit = offset_in_page(start) >> fs_info->sectorsize_bits; \ - __start_bit += fs_info->sectors_per_page * btrfs_bitmap_nr_##name; \ + __start_bit += blocks_per_folio * btrfs_bitmap_nr_##name; \ __start_bit; \ }) @@ -323,7 +329,8 @@ void btrfs_folio_end_lock_bitmap(const struct btrfs_fs_info *fs_info, struct folio *folio, unsigned long bitmap) { struct btrfs_subpage *subpage = folio_get_private(folio); - const int start_bit = fs_info->sectors_per_page * btrfs_bitmap_nr_locked; + const unsigned int blocks_per_folio = btrfs_blocks_per_folio(fs_info, folio); + const int start_bit = blocks_per_folio * btrfs_bitmap_nr_locked; unsigned long flags; bool last = false; int cleared = 0; @@ -341,7 +348,7 @@ void btrfs_folio_end_lock_bitmap(const struct btrfs_fs_info *fs_info, } spin_lock_irqsave(&subpage->lock, flags); - for_each_set_bit(bit, &bitmap, fs_info->sectors_per_page) { + for_each_set_bit(bit, &bitmap, blocks_per_folio) { if (test_and_clear_bit(bit + start_bit, subpage->bitmaps)) cleared++; } @@ -352,15 +359,27 @@ void btrfs_folio_end_lock_bitmap(const struct btrfs_fs_info *fs_info, folio_unlock(folio); } -#define subpage_test_bitmap_all_set(fs_info, subpage, name) \ +#define subpage_test_bitmap_all_set(fs_info, folio, name) \ +({ \ + struct btrfs_subpage *subpage = folio_get_private(folio); \ + const unsigned int blocks_per_folio = \ + btrfs_blocks_per_folio(fs_info, folio); \ + \ bitmap_test_range_all_set(subpage->bitmaps, \ - fs_info->sectors_per_page * btrfs_bitmap_nr_##name, \ - fs_info->sectors_per_page) + blocks_per_folio * btrfs_bitmap_nr_##name, \ + blocks_per_folio); \ +}) -#define subpage_test_bitmap_all_zero(fs_info, subpage, name) \ +#define subpage_test_bitmap_all_zero(fs_info, folio, name) \ +({ \ + struct btrfs_subpage *subpage = folio_get_private(folio); \ + const unsigned int blocks_per_folio = \ + btrfs_blocks_per_folio(fs_info, folio); \ + \ bitmap_test_range_all_zero(subpage->bitmaps, \ - fs_info->sectors_per_page * btrfs_bitmap_nr_##name, \ - fs_info->sectors_per_page) + blocks_per_folio * btrfs_bitmap_nr_##name, \ + blocks_per_folio); \ +}) void btrfs_subpage_set_uptodate(const struct btrfs_fs_info *fs_info, struct folio *folio, u64 start, u32 len) @@ -372,7 +391,7 @@ void btrfs_subpage_set_uptodate(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_set(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - if (subpage_test_bitmap_all_set(fs_info, subpage, uptodate)) + if (subpage_test_bitmap_all_set(fs_info, folio, uptodate)) folio_mark_uptodate(folio); spin_unlock_irqrestore(&subpage->lock, flags); } @@ -426,7 +445,7 @@ bool btrfs_subpage_clear_and_test_dirty(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_clear(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - if (subpage_test_bitmap_all_zero(fs_info, subpage, dirty)) + if (subpage_test_bitmap_all_zero(fs_info, folio, dirty)) last = true; spin_unlock_irqrestore(&subpage->lock, flags); return last; @@ -484,7 +503,7 @@ void btrfs_subpage_clear_writeback(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_clear(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - if (subpage_test_bitmap_all_zero(fs_info, subpage, writeback)) { + if (subpage_test_bitmap_all_zero(fs_info, folio, writeback)) { ASSERT(folio_test_writeback(folio)); folio_end_writeback(folio); } @@ -515,7 +534,7 @@ void btrfs_subpage_clear_ordered(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_clear(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - if (subpage_test_bitmap_all_zero(fs_info, subpage, ordered)) + if (subpage_test_bitmap_all_zero(fs_info, folio, ordered)) folio_clear_ordered(folio); spin_unlock_irqrestore(&subpage->lock, flags); } @@ -530,7 +549,7 @@ void btrfs_subpage_set_checked(const struct btrfs_fs_info *fs_info, spin_lock_irqsave(&subpage->lock, flags); bitmap_set(subpage->bitmaps, start_bit, len >> fs_info->sectorsize_bits); - if (subpage_test_bitmap_all_set(fs_info, subpage, checked)) + if (subpage_test_bitmap_all_set(fs_info, folio, checked)) folio_set_checked(folio); spin_unlock_irqrestore(&subpage->lock, flags); } @@ -652,6 +671,31 @@ IMPLEMENT_BTRFS_PAGE_OPS(ordered, folio_set_ordered, folio_clear_ordered, IMPLEMENT_BTRFS_PAGE_OPS(checked, folio_set_checked, folio_clear_checked, folio_test_checked); +#define GET_SUBPAGE_BITMAP(fs_info, folio, name, dst) \ +{ \ + const unsigned int blocks_per_folio = \ + btrfs_blocks_per_folio(fs_info, folio); \ + const struct btrfs_subpage *subpage = folio_get_private(folio); \ + \ + ASSERT(blocks_per_folio < BITS_PER_LONG); \ + *dst = bitmap_read(subpage->bitmaps, \ + blocks_per_folio * btrfs_bitmap_nr_##name, \ + blocks_per_folio); \ +} + +#define SUBPAGE_DUMP_BITMAP(fs_info, folio, name, start, len) \ +{ \ + unsigned long bitmap; \ + const unsigned int blocks_per_folio = \ + btrfs_blocks_per_folio(fs_info, folio); \ + \ + GET_SUBPAGE_BITMAP(fs_info, folio, name, &bitmap); \ + btrfs_warn(fs_info, \ + "dumpping bitmap start=%llu len=%u folio=%llu " #name "_bitmap=%*pbl", \ + start, len, folio_pos(folio), \ + blocks_per_folio, &bitmap); \ +} + /* * Make sure not only the page dirty bit is cleared, but also subpage dirty bit * is cleared. @@ -677,6 +721,10 @@ void btrfs_folio_assert_not_dirty(const struct btrfs_fs_info *fs_info, subpage = folio_get_private(folio); ASSERT(subpage); spin_lock_irqsave(&subpage->lock, flags); + if (unlikely(!bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits))) { + SUBPAGE_DUMP_BITMAP(fs_info, folio, dirty, start, len); + ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits)); + } ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits)); spin_unlock_irqrestore(&subpage->lock, flags); } @@ -706,28 +754,21 @@ void btrfs_folio_set_lock(const struct btrfs_fs_info *fs_info, nbits = len >> fs_info->sectorsize_bits; spin_lock_irqsave(&subpage->lock, flags); /* Target range should not yet be locked. */ - ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits)); + if (unlikely(!bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits))) { + SUBPAGE_DUMP_BITMAP(fs_info, folio, locked, start, len); + ASSERT(bitmap_test_range_all_zero(subpage->bitmaps, start_bit, nbits)); + } bitmap_set(subpage->bitmaps, start_bit, nbits); ret = atomic_add_return(nbits, &subpage->nr_locked); - ASSERT(ret <= fs_info->sectors_per_page); + ASSERT(ret <= btrfs_blocks_per_folio(fs_info, folio)); spin_unlock_irqrestore(&subpage->lock, flags); } -#define GET_SUBPAGE_BITMAP(subpage, fs_info, name, dst) \ -{ \ - const int sectors_per_page = fs_info->sectors_per_page; \ - \ - ASSERT(sectors_per_page < BITS_PER_LONG); \ - *dst = bitmap_read(subpage->bitmaps, \ - sectors_per_page * btrfs_bitmap_nr_##name, \ - sectors_per_page); \ -} - void __cold btrfs_subpage_dump_bitmap(const struct btrfs_fs_info *fs_info, struct folio *folio, u64 start, u32 len) { struct btrfs_subpage *subpage; - const u32 sectors_per_page = fs_info->sectors_per_page; + const unsigned int blocks_per_folio = btrfs_blocks_per_folio(fs_info, folio); unsigned long uptodate_bitmap; unsigned long dirty_bitmap; unsigned long writeback_bitmap; @@ -737,28 +778,28 @@ void __cold btrfs_subpage_dump_bitmap(const struct btrfs_fs_info *fs_info, unsigned long flags; ASSERT(folio_test_private(folio) && folio_get_private(folio)); - ASSERT(sectors_per_page > 1); + ASSERT(blocks_per_folio > 1); subpage = folio_get_private(folio); spin_lock_irqsave(&subpage->lock, flags); - GET_SUBPAGE_BITMAP(subpage, fs_info, uptodate, &uptodate_bitmap); - GET_SUBPAGE_BITMAP(subpage, fs_info, dirty, &dirty_bitmap); - GET_SUBPAGE_BITMAP(subpage, fs_info, writeback, &writeback_bitmap); - GET_SUBPAGE_BITMAP(subpage, fs_info, ordered, &ordered_bitmap); - GET_SUBPAGE_BITMAP(subpage, fs_info, checked, &checked_bitmap); - GET_SUBPAGE_BITMAP(subpage, fs_info, locked, &locked_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, uptodate, &uptodate_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, dirty, &dirty_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, writeback, &writeback_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, ordered, &ordered_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, checked, &checked_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, locked, &locked_bitmap); spin_unlock_irqrestore(&subpage->lock, flags); dump_page(folio_page(folio, 0), "btrfs subpage dump"); btrfs_warn(fs_info, "start=%llu len=%u page=%llu, bitmaps uptodate=%*pbl dirty=%*pbl locked=%*pbl writeback=%*pbl ordered=%*pbl checked=%*pbl", start, len, folio_pos(folio), - sectors_per_page, &uptodate_bitmap, - sectors_per_page, &dirty_bitmap, - sectors_per_page, &locked_bitmap, - sectors_per_page, &writeback_bitmap, - sectors_per_page, &ordered_bitmap, - sectors_per_page, &checked_bitmap); + blocks_per_folio, &uptodate_bitmap, + blocks_per_folio, &dirty_bitmap, + blocks_per_folio, &locked_bitmap, + blocks_per_folio, &writeback_bitmap, + blocks_per_folio, &ordered_bitmap, + blocks_per_folio, &checked_bitmap); } void btrfs_get_subpage_dirty_bitmap(struct btrfs_fs_info *fs_info, @@ -769,10 +810,10 @@ void btrfs_get_subpage_dirty_bitmap(struct btrfs_fs_info *fs_info, unsigned long flags; ASSERT(folio_test_private(folio) && folio_get_private(folio)); - ASSERT(fs_info->sectors_per_page > 1); + ASSERT(btrfs_blocks_per_folio(fs_info, folio) > 1); subpage = folio_get_private(folio); spin_lock_irqsave(&subpage->lock, flags); - GET_SUBPAGE_BITMAP(subpage, fs_info, dirty, ret_bitmap); + GET_SUBPAGE_BITMAP(fs_info, folio, dirty, ret_bitmap); spin_unlock_irqrestore(&subpage->lock, flags); } |