From: David Howells <dhowells@xxxxxxxxxx>
[ Upstream commit bb413489288e4e457353bac513fddb6330d245ca ]
The mtime on an inode needs to be updated when a write is made into an
mmap'ed section. There are three ways in which this could be done: update
it when page_mkwrite is called, update it when a page is changed from dirty
to writeback or leave it to the server and fix the mtime up from the reply
to the StoreData RPC.
Found with the generic/215 xfstest.
Fixes: 1cf7a1518aef ("afs: Implement shared-writeable mmap")
Signed-off-by: David Howells <dhowells@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
fs/afs/write.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/afs/write.c b/fs/afs/write.c
index cb76566763dba..371db86c6c5ec 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -811,6 +811,7 @@ vm_fault_t afs_page_mkwrite(struct vm_fault *vmf)
vmf->page->index, priv);
SetPagePrivate(vmf->page);
set_page_private(vmf->page, priv);
+ file_update_time(file);
sb_end_pagefault(inode->i_sb);
return VM_FAULT_LOCKED;
--
2.25.1
