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overlay2: better documentation of user namespace behavior when checking native diff support

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Signed-off-by: Jonas Geiler <git@jonasgeiler.com>
This commit is contained in:
Jonas Geiler
2024-03-21 22:17:54 +01:00
parent f6b80253b8
commit aef6905e01
1 changed files with 3 additions and 3 deletions
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6
daemon/graphdriver/overlay2/check.go
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@@ -22,9 +22,9 @@ import (
// directory or the kernel enable CONFIG_OVERLAY_FS_REDIRECT_DIR.
// When these exist naive diff should be used.
//
// When running in a user namespace before kernel 5.11, returns
// errRunningInUserNS immediately. In kernel 5.11 and later, we
// check support as usual with some user namespace differences.
// When running in a user namespace it either immediately returns with an error
// when userxattr is not supported, or performs the native diff checks as usual
// with some minor user namespace differences, like adding userxattr.
func doesSupportNativeDiff(d string) error {
userxattr := false
if userns.RunningInUserNS() {