@@ -429,6 +429,32 @@ void btrfs_subpage_clear_writeback(const struct btrfs_fs_info *fs_info,
spin_unlock_irqrestore(&subpage->lock, flags);
}
+void btrfs_subpage_set_ordered(const struct btrfs_fs_info *fs_info,
+ struct page *page, u64 start, u32 len)
+{
+ struct btrfs_subpage *subpage = (struct btrfs_subpage *)page->private;
+ const u16 tmp = btrfs_subpage_calc_bitmap(fs_info, page, start, len);
+ unsigned long flags;
+
+ spin_lock_irqsave(&subpage->lock, flags);
+ subpage->ordered_bitmap |= tmp;
+ SetPageOrdered(page);
+ spin_unlock_irqrestore(&subpage->lock, flags);
+}
+
+void btrfs_subpage_clear_ordered(const struct btrfs_fs_info *fs_info,
+ struct page *page, u64 start, u32 len)
+{
+ struct btrfs_subpage *subpage = (struct btrfs_subpage *)page->private;
+ const u16 tmp = btrfs_subpage_calc_bitmap(fs_info, page, start, len);
+ unsigned long flags;
+
+ spin_lock_irqsave(&subpage->lock, flags);
+ subpage->ordered_bitmap &= ~tmp;
+ if (subpage->ordered_bitmap == 0)
+ ClearPageOrdered(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.
@@ -451,6 +477,7 @@ IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(uptodate);
IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(error);
IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(dirty);
IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(writeback);
+IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(ordered);
/*
* Note that, in selftests (extent-io-tests), we can have empty fs_info passed
@@ -519,3 +546,5 @@ 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);
+IMPLEMENT_BTRFS_PAGE_OPS(ordered, SetPageOrdered, ClearPageOrdered,
+ PageOrdered);
@@ -34,6 +34,9 @@ struct btrfs_subpage {
struct {
atomic_t readers;
atomic_t writers;
+
+ /* If a sector has pending ordered extent */
+ u16 ordered_bitmap;
};
};
};
@@ -111,6 +114,7 @@ DECLARE_BTRFS_SUBPAGE_OPS(uptodate);
DECLARE_BTRFS_SUBPAGE_OPS(error);
DECLARE_BTRFS_SUBPAGE_OPS(dirty);
DECLARE_BTRFS_SUBPAGE_OPS(writeback);
+DECLARE_BTRFS_SUBPAGE_OPS(ordered);
bool btrfs_subpage_clear_and_test_dirty(const struct btrfs_fs_info *fs_info,
struct page *page, u64 start, u32 len);
This patch introduces the following functions to handle btrfs subpage ordered (private2) status: - btrfs_subpage_set_ordered() - btrfs_subpage_clear_ordered() - btrfs_subpage_test_ordered() Those helpers can only be called when the range is ensured to be inside the page. - btrfs_page_set_ordered() - btrfs_page_clear_ordered() - btrfs_page_test_ordered() Those helpers can handle both regular sector size and subpage without problem. Those functions are here to co-ordinate btrfs_invalidatepage() with btrfs_writepage_endio_finish_ordered(), to make sure only one of those functions can finish the ordered extent. Signed-off-by: Qu Wenruo <wqu@suse.com> --- fs/btrfs/subpage.c | 29 +++++++++++++++++++++++++++++ fs/btrfs/subpage.h | 4 ++++ 2 files changed, 33 insertions(+)