btrfs: introduce helpers for subpage error status
Introduce the following functions to handle subpage error status:
- btrfs_subpage_set_error()
- btrfs_subpage_clear_error()
- btrfs_subpage_test_error()
These helpers can only be called when the page has subpage attached
and the range is ensured to be inside the page.
- btrfs_page_set_error()
- btrfs_page_clear_error()
- btrfs_page_test_error()
These helpers can handle both regular sector size and subpage without
problem.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
diff --git a/fs/btrfs/subpage.c b/fs/btrfs/subpage.c
index 4e1b187..2c51ab7 100644
--- a/fs/btrfs/subpage.c
+++ b/fs/btrfs/subpage.c
@@ -160,6 +160,33 @@ void btrfs_subpage_clear_uptodate(const struct btrfs_fs_info *fs_info,
spin_unlock_irqrestore(&subpage->lock, flags);
}
+void btrfs_subpage_set_error(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->error_bitmap |= tmp;
+ SetPageError(page);
+ spin_unlock_irqrestore(&subpage->lock, flags);
+}
+
+void btrfs_subpage_clear_error(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->error_bitmap &= ~tmp;
+ if (subpage->error_bitmap == 0)
+ ClearPageError(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.
@@ -179,6 +206,7 @@ bool btrfs_subpage_test_##name(const struct btrfs_fs_info *fs_info, \
return ret; \
}
IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(uptodate);
+IMPLEMENT_BTRFS_SUBPAGE_TEST_OP(error);
/*
* Note that, in selftests (extent-io-tests), we can have empty fs_info passed
@@ -214,3 +242,4 @@ bool btrfs_page_test_##name(const struct btrfs_fs_info *fs_info, \
}
IMPLEMENT_BTRFS_PAGE_OPS(uptodate, SetPageUptodate, ClearPageUptodate,
PageUptodate);
+IMPLEMENT_BTRFS_PAGE_OPS(error, SetPageError, ClearPageError, PageError);