Port most syscalls to VFS2.

pipe and pipe2 aren't ported, pending a slight rework of pipe FDs for VFS2.
mount and umount2 aren't ported out of temporary laziness. access and faccessat
need additional FSImpl methods to implement properly, but are stubbed to
prevent googletest from CHECK-failing. Other syscalls require additional
plumbing.

Updates #1623

PiperOrigin-RevId: 297188448

7 files changed, 17 insertions, 0 deletions

diff --git a/pkg/abi/linux/epoll_amd64.go b/pkg/abi/linux/epoll_amd64.go
index 57041491c..34ff18009 100644
--- a/pkg/abi/linux/epoll_amd64.go
+++ b/pkg/abi/linux/epoll_amd64.go
@@ -15,6 +15,8 @@
 package linux
 
 // EpollEvent is equivalent to struct epoll_event from epoll(2).
+//
+// +marshal
 type EpollEvent struct {
 	Events uint32
 	// Linux makes struct epoll_event::data a __u64. We represent it as
diff --git a/pkg/abi/linux/epoll_arm64.go b/pkg/abi/linux/epoll_arm64.go
index 62ef5821e..f86c35329 100644
--- a/pkg/abi/linux/epoll_arm64.go
+++ b/pkg/abi/linux/epoll_arm64.go
@@ -15,6 +15,8 @@
 package linux
 
 // EpollEvent is equivalent to struct epoll_event from epoll(2).
+//
+// +marshal
 type EpollEvent struct {
 	Events uint32
 	// Linux makes struct epoll_event a __u64, necessitating 4 bytes of padding
diff --git a/pkg/abi/linux/file.go b/pkg/abi/linux/file.go
index c3ab15a4f..e229ac21c 100644
--- a/pkg/abi/linux/file.go
+++ b/pkg/abi/linux/file.go
@@ -241,6 +241,8 @@ const (
 )
 
 // Statx represents struct statx.
+//
+// +marshal
 type Statx struct {
 	Mask           uint32
 	Blksize        uint32
diff --git a/pkg/abi/linux/fs.go b/pkg/abi/linux/fs.go
index 2c652baa2..158d2db5b 100644
--- a/pkg/abi/linux/fs.go
+++ b/pkg/abi/linux/fs.go
@@ -38,6 +38,8 @@ const (
 )
 
 // Statfs is struct statfs, from uapi/asm-generic/statfs.h.
+//
+// +marshal
 type Statfs struct {
 	// Type is one of the filesystem magic values, defined above.
 	Type uint64
diff --git a/pkg/abi/linux/signal.go b/pkg/abi/linux/signal.go
index c69b04ea9..1c330e763 100644
--- a/pkg/abi/linux/signal.go
+++ b/pkg/abi/linux/signal.go
@@ -115,6 +115,8 @@ const (
 )
 
 // SignalSet is a signal mask with a bit corresponding to each signal.
+//
+// +marshal
 type SignalSet uint64
 
 // SignalSetSize is the size in bytes of a SignalSet.
diff --git a/pkg/abi/linux/time.go b/pkg/abi/linux/time.go
index e562b46d9..e6860ed49 100644
--- a/pkg/abi/linux/time.go
+++ b/pkg/abi/linux/time.go
@@ -157,6 +157,8 @@ func DurationToTimespec(dur time.Duration) Timespec {
 const SizeOfTimeval = 16
 
 // Timeval represents struct timeval in <time.h>.
+//
+// +marshal
 type Timeval struct {
 	Sec  int64
 	Usec int64
@@ -230,6 +232,8 @@ type Tms struct {
 type TimerID int32
 
 // StatxTimestamp represents struct statx_timestamp.
+//
+// +marshal
 type StatxTimestamp struct {
 	Sec  int64
 	Nsec uint32
@@ -258,6 +262,8 @@ func NsecToStatxTimestamp(nsec int64) (ts StatxTimestamp) {
 }
 
 // Utime represents struct utimbuf used by utimes(2).
+//
+// +marshal
 type Utime struct {
 	Actime  int64
 	Modtime int64
diff --git a/pkg/abi/linux/xattr.go b/pkg/abi/linux/xattr.go
index a3b6406fa..99180b208 100644
--- a/pkg/abi/linux/xattr.go
+++ b/pkg/abi/linux/xattr.go
@@ -18,6 +18,7 @@ package linux
 const (
 	XATTR_NAME_MAX = 255
 	XATTR_SIZE_MAX = 65536
+	XATTR_LIST_MAX = 65536
 
 	XATTR_CREATE  = 1
 	XATTR_REPLACE = 2