From 007707a0726602bc99fc0dccaf2994ad967b9d96 Mon Sep 17 00:00:00 2001
From: Rahat Mahmood <rahat@google.com>
Date: Thu, 12 Dec 2019 11:19:18 -0800
Subject: Implement kernfs.
PiperOrigin-RevId: 285231002
---
pkg/abi/linux/file.go | 23 +++++++++++++++++++++++
pkg/abi/linux/fs.go | 7 +++++++
2 files changed, 30 insertions(+)
(limited to 'pkg/abi/linux')
diff --git a/pkg/abi/linux/file.go b/pkg/abi/linux/file.go
index 0f014d27f..16791d03e 100644
--- a/pkg/abi/linux/file.go
+++ b/pkg/abi/linux/file.go
@@ -286,6 +286,29 @@ func (m FileMode) String() string {
return strings.Join(s, "|")
}
+// DirentType maps file types to dirent types appropriate for (struct
+// dirent)::d_type.
+func (m FileMode) DirentType() uint8 {
+ switch m.FileType() {
+ case ModeSocket:
+ return DT_SOCK
+ case ModeSymlink:
+ return DT_LNK
+ case ModeRegular:
+ return DT_REG
+ case ModeBlockDevice:
+ return DT_BLK
+ case ModeDirectory:
+ return DT_DIR
+ case ModeCharacterDevice:
+ return DT_CHR
+ case ModeNamedPipe:
+ return DT_FIFO
+ default:
+ return DT_UNKNOWN
+ }
+}
+
var modeExtraBits = abi.FlagSet{
{
Flag: ModeSetUID,
diff --git a/pkg/abi/linux/fs.go b/pkg/abi/linux/fs.go
index b416e3472..2c652baa2 100644
--- a/pkg/abi/linux/fs.go
+++ b/pkg/abi/linux/fs.go
@@ -92,3 +92,10 @@ const (
SYNC_FILE_RANGE_WRITE = 2
SYNC_FILE_RANGE_WAIT_AFTER = 4
)
+
+// Flag argument to renameat2(2), from include/uapi/linux/fs.h.
+const (
+ RENAME_NOREPLACE = (1 << 0) // Don't overwrite target.
+ RENAME_EXCHANGE = (1 << 1) // Exchange src and dst.
+ RENAME_WHITEOUT = (1 << 2) // Whiteout src.
+)
--
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