From 8d75fc4883ca8c10fb615203993d56d33a9e36b6 Mon Sep 17 00:00:00 2001
From: Rahat Mahmood <rahat@google.com>
Date: Fri, 28 Aug 2020 14:29:16 -0700
Subject: Implement StatFS for various VFS2 filesystems.
This mainly involved enabling kernfs' client filesystems to provide a
StatFS implementation.
Fixes #3411, #3515.
PiperOrigin-RevId: 329009864
---
pkg/sentry/vfs/filesystem_impl_util.go | 13 +++++++++++++
1 file changed, 13 insertions(+)
(limited to 'pkg/sentry/vfs')
diff --git a/pkg/sentry/vfs/filesystem_impl_util.go b/pkg/sentry/vfs/filesystem_impl_util.go
index 465e610e0..2620cf975 100644
--- a/pkg/sentry/vfs/filesystem_impl_util.go
+++ b/pkg/sentry/vfs/filesystem_impl_util.go
@@ -16,6 +16,9 @@ package vfs
import (
"strings"
+
+ "gvisor.dev/gvisor/pkg/abi/linux"
+ "gvisor.dev/gvisor/pkg/usermem"
)
// GenericParseMountOptions parses a comma-separated list of options of the
@@ -41,3 +44,13 @@ func GenericParseMountOptions(str string) map[string]string {
}
return m
}
+
+// GenericStatFS returns a statfs struct filled with the common fields for a
+// general filesystem. This is analogous to Linux's fs/libfs.cs:simple_statfs().
+func GenericStatFS(fsMagic uint64) linux.Statfs {
+ return linux.Statfs{
+ Type: fsMagic,
+ BlockSize: usermem.PageSize,
+ NameLength: linux.NAME_MAX,
+ }
+}
--
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