[PATCH] fuse: fuse_flush must check mapping->flags for errors

[Maxim Patlasov]

fuse_flush() calls write_inode_now() that triggers writeback, but actual
writeback will happen later, on fuse_sync_writes(). If an error happens,
fuse_writepage_end() will set error bit in mapping->flags. So, we have to
check mapping->flags after fuse_sync_writes().

Signed-off-by: Maxim Patlasov <mpatla...@virtuozzo.com>
---
 fs/fuse/file.c |    9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index ad1da83..b43401e 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -413,6 +413,15 @@ static int fuse_flush(struct file *file, fl_owner_t id)
        if (err)
                return err;
 
+       if (test_bit(AS_ENOSPC, &file->f_mapping->flags) &&
+           test_and_clear_bit(AS_ENOSPC, &file->f_mapping->flags))
+               err = -ENOSPC;
+       if (test_bit(AS_EIO, &file->f_mapping->flags) &&
+           test_and_clear_bit(AS_EIO, &file->f_mapping->flags))
+               err = -EIO;
+       if (err)
+               return err;
+
        inode_lock(inode);
        fuse_sync_writes(inode);
        inode_unlock(inode);