From 5d7eb1a3225309b294275385ece36fee256d5c46 Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Thu, 1 Sep 2016 22:26:23 +0800 Subject: [PATCH] ceph: ignore error from invalidate_inode_pages2_range() in direct write This call can fail if there are dirty pages. The preceding call to filemap_write_and_wait_range() will normally remove dirty pages, but as inode_lock() is not held over calls to ceph_direct_read_write(), it could race with non-direct writes and pages could be dirtied immediately after filemap_write_and_wait_range() returns If there are dirty pages, they will be removed by the subsequent call to truncate_inode_pages_range(), so having them here is not a problem. If the 'ret' value is left holding an error, then in the async IO case (aio_req is not NULL) the loop that would normally call ceph_osdc_start_request() will see the error in 'ret' and abort all requests. This doesn't seem like correct behaviour. So use separate 'ret2' instead of overloading 'ret'. Signed-off-by: NeilBrown Reviewed-by: Jeff Layton Reviewed-by: Yan, Zheng --- fs/ceph/file.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/fs/ceph/file.c b/fs/ceph/file.c index 0f5375d..395c7fc 100644 --- a/fs/ceph/file.c +++ b/fs/ceph/file.c @@ -902,10 +902,10 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter, return ret; if (write) { - ret = invalidate_inode_pages2_range(inode->i_mapping, + int ret2 = invalidate_inode_pages2_range(inode->i_mapping, pos >> PAGE_SHIFT, (pos + count) >> PAGE_SHIFT); - if (ret < 0) + if (ret2 < 0) dout("invalidate_inode_pages2_range returned %d\n", ret); flags = CEPH_OSD_FLAG_ORDERSNAP | -- 2.7.4