From: Chris Mason <chris.mason@oracle.com>
Date: Fri, 18 Jul 2008 15:56:15 +0000 (-0400)
Subject: Btrfs: Don't allow releasepage to succeed if EXTENT_ORDERED is set
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=211f90e68b679d27fe23c5505f86d6ce62c98bae;p=GitHub%2FLineageOS%2FG12%2Fandroid_kernel_amlogic_linux-4.9.git

Btrfs: Don't allow releasepage to succeed if EXTENT_ORDERED is set

Signed-off-by: Chris Mason <chris.mason@oracle.com>
---

diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index feff16cb9b40..3153b4fdd0b3 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2542,7 +2542,8 @@ int try_release_extent_state(struct extent_map_tree *map,
 	u64 end = start + PAGE_CACHE_SIZE - 1;
 	int ret = 1;
 
-	if (test_range_bit(tree, start, end, EXTENT_IOBITS, 0))
+	if (test_range_bit(tree, start, end,
+			   EXTENT_IOBITS | EXTENT_ORDERED, 0))
 		ret = 0;
 	else {
 		if ((mask & GFP_NOFS) == GFP_NOFS)
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 4d729d90d2b8..8803abc89bb8 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -477,10 +477,8 @@ printk("queueing worker to fixup page %lu %Lu\n", inode->i_ino, page_offset(page
 	return -EAGAIN;
 }
 
-int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
-				struct extent_state *state, int uptodate)
+static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
 {
-	struct inode *inode = page->mapping->host;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	struct btrfs_trans_handle *trans;
 	struct btrfs_ordered_extent *ordered_extent;
@@ -550,6 +548,12 @@ int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
 	return 0;
 }
 
+int btrfs_writepage_end_io_hook(struct page *page, u64 start, u64 end,
+				struct extent_state *state, int uptodate)
+{
+	return btrfs_finish_ordered_io(page->mapping->host, start, end);
+}
+
 int btrfs_readpage_io_hook(struct page *page, u64 start, u64 end)
 {
 	int ret = 0;
@@ -2663,8 +2667,8 @@ static void btrfs_invalidatepage(struct page *page, unsigned long offset)
 		clear_extent_bit(tree, page_start, page_end,
 				 EXTENT_DIRTY | EXTENT_DELALLOC |
 				 EXTENT_LOCKED, 1, 0, GFP_NOFS);
-		btrfs_writepage_end_io_hook(page, page_start,
-					    page_end, NULL, 1);
+		btrfs_finish_ordered_io(page->mapping->host,
+					page_start, page_end);
 		btrfs_put_ordered_extent(ordered);
 		lock_extent(tree, page_start, page_end, GFP_NOFS);
 	}