Merge branch 'bug-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/josef/btrfs...
[~shefty/rdma-dev.git] / fs / btrfs / inode.c
index f2fb974ed8f035385f6b7b953338607f7bbf1db2..9f08136b10c45d12e7a619564ab048e94f842111 100644 (file)
@@ -6681,7 +6681,8 @@ int btrfs_start_delalloc_inodes(struct btrfs_root *root, int delay_iput)
        return 0;
 }
 
-int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput)
+int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput,
+                                  int sync)
 {
        struct btrfs_inode *binode;
        struct inode *inode = NULL;
@@ -6703,7 +6704,26 @@ int btrfs_start_one_delalloc_inode(struct btrfs_root *root, int delay_iput)
        spin_unlock(&root->fs_info->delalloc_lock);
 
        if (inode) {
-               write_inode_now(inode, 0);
+               if (sync) {
+                       filemap_write_and_wait(inode->i_mapping);
+                       /*
+                        * We have to do this because compression doesn't
+                        * actually set PG_writeback until it submits the pages
+                        * for IO, which happens in an async thread, so we could
+                        * race and not actually wait for any writeback pages
+                        * because they've not been submitted yet.  Technically
+                        * this could still be the case for the ordered stuff
+                        * since the async thread may not have started to do its
+                        * work yet.  If this becomes the case then we need to
+                        * figure out a way to make sure that in writepage we
+                        * wait for any async pages to be submitted before
+                        * returning so that fdatawait does what its supposed to
+                        * do.
+                        */
+                       btrfs_wait_ordered_range(inode, 0, (u64)-1);
+               } else {
+                       filemap_flush(inode->i_mapping);
+               }
                if (delay_iput)
                        btrfs_add_delayed_iput(inode);
                else