diff options
Diffstat (limited to 'fs/btrfs/subpage.c')
| -rw-r--r-- | fs/btrfs/subpage.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c index 7ae5a77e5f40..df1461cea507 100644 --- a/fs/btrfs/subpage.c +++ b/fs/btrfs/subpage.c @@ -269,6 +269,33 @@ void btrfs_subpage_clear_dirty(const struct btrfs_fs_info *fs_info, clear_page_dirty_for_io(page); } +void btrfs_subpage_set_writeback(const struct btrfs_fs_info *fs_info, + struct page *page, u64 start, u32 len) +{ + struct btrfs_subpage *subpage = (struct btrfs_subpage *)page->private; + u16 tmp = btrfs_subpage_calc_bitmap(fs_info, page, start, len); + unsigned long flags; + + spin_lock_irqsave(&subpage->lock, flags); + subpage->writeback_bitmap |= tmp; + set_page_writeback(page); + spin_unlock_irqrestore(&subpage->lock, flags); +} + +void btrfs_subpage_clear_writeback(const struct btrfs_fs_info *fs_info, + struct page *page, u64 start, u32 len) +{ + struct btrfs_subpage *subpage = (struct btrfs_subpage *)page->private; + u16 tmp = btrfs_subpage_calc_bitmap(fs_info, page, start, len); + unsigned long flags; + + spin_lock_irqsave(&subpage->lock, flags); + subpage->writeback_bitmap &= ~tmp; + if (subpage->writeback_bitmap == 0) + end_page_writeback(page); + spin_unlock_irqrestore(&subpage->lock, flags); +} + /* * Unlike set/clear which is dependent on each page status, for test all bits * are tested in the same way. @@ -290,6 +317,7 @@ bool btrfs_subpage_test_##name(const struct btrfs_fs_info *fs_info, \ IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(uptodate); IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(error); IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(dirty); +IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(writeback); /* * Note that, in selftests (extent-io-tests), we can have empty fs_info passed @@ -328,3 +356,5 @@ IMPLEMENT_BTRFS_PAGE_OPS(uptodate, SetPageUptodate, ClearPageUptodate, IMPLEMENT_BTRFS_PAGE_OPS(error, SetPageError, ClearPageError, PageError); IMPLEMENT_BTRFS_PAGE_OPS(dirty, set_page_dirty, clear_page_dirty_for_io, PageDirty); +IMPLEMENT_BTRFS_PAGE_OPS(writeback, set_page_writeback, end_page_writeback, + PageWriteback); |