From: Erez Zadok <ezk@cs.sunysb.edu>
Date: Fri, 13 May 2022 22:02:36 +0000 (-0400)
Subject: update
X-Git-Url: https://git.fsl.cs.sunysb.edu/?a=commitdiff_plain;h=f1b9321b586f9d2eb4ad93d4a8badbb5c7270981;p=wrapfs-mgmt.git

update
---

diff --git a/bug-fixes/basic-user-ns.log b/bug-fixes/basic-user-ns.log
new file mode 100644
index 0000000..63a169d
--- /dev/null
+++ b/bug-fixes/basic-user-ns.log
@@ -0,0 +1,15 @@
+Wrapfs: port to new user_namespace and mmap APIs
+
+New struct user_namespace arg is now passed to many VFS ops.  See details
+here: https://lwn.net/Articles/842423.  Like eCryptfs, we can't currently
+stack on top of idmapped file systems, so check for it at mount and
+prohibit.  Instead, we use the default init_user_ns global
+
+Also at mount, we prohibit mount on top of another wrapfs mount, due to
+known incompatibilities.
+
+mmap ops ->fault and ->page_mkwrite take a different vma struct with some
+const args, so extract the right fields as needed.
+
+Signed-off-by: Andrew Burford <aburford@cs.stonybrook.edu>
+Signed-off-by: Erez Zadok <ezk@cs.stonybrook.edu>