commit dfb4d84f39b49d8899e769fcc17c239af2639fe0
author Miriam Polzer <mpolzer@google.com> Mon Sep 28 19:05:59 2020 +0200
committer Commit Bot <commit-bot@chromium.org> Wed Oct 21 11:05:03 2020 +0000
tree 23ede5dd538f2472f73ac026e35d7c5241cde4f3
parent 95feaed0acaa114112c920f96a551a440e8f4ef5

cryptohome: Document rollback dependency

Document that rollback relies on the install attributes file to be
backwards compatible.

BUG=chromium:1124428
TEST=None

Change-Id: I2a89133a1d296420ef84c14f05f3d8ff9794a149
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform2/+/2435679
Tested-by: Miriam Polzer <mpolzer@google.com>
Commit-Queue: Miriam Polzer <mpolzer@google.com>
Reviewed-by: John L Chen <zuan@chromium.org>

cryptohome/install_attributes.cc

diff --git a/cryptohome/install_attributes.cc b/cryptohome/install_attributes.cc
index 7210e8a..2ff66cb 100644
--- a/cryptohome/install_attributes.cc
+++ b/cryptohome/install_attributes.cc
@@ -22,6 +22,9 @@
 
 namespace cryptohome {
 
+// Note: Changes in the format of the install attributes file might break
+// rollback (go/rollback-data-restore). If possible, try to maintain backwards
+// compatibility for four release cycles.
 // By default, we store this with other cryptohome state.
 const char InstallAttributes::kDefaultDataFile[] =
     "/home/.shadow/install_attributes.pb";