commit 13b15b780d9013988b1fb0e79e30b2528a877638
author Alexandru Matei <alexandru.matei@uipath.com> Mon Nov 06 13:13:51 2023 +0000
committer Gopher Robot <gobot@golang.org> Sat Nov 18 01:08:36 2023 +0000
tree 3fb4b5b4051ab1cd5f003e8a111078240b885db6
parent 11eadc05e9bfbaaf23ac6ebc28595a9a12f607f4

unix: add IoctlLoopConfigure on linux

LOOP_CONFIGURE ioctl is used to setup and configure all loop device
parameters in a single step.
Add to the unix package a new function that exposes LOOP_CONFIGURE.

Fixes golang/go#63962

Change-Id: Ia169d268b52b1384febc6bff9c707b721ab2bb24
GitHub-Last-Rev: f9cc4c94cb654afd596df6e28a0d0a1bf60d15eb
GitHub-Pull-Request: golang/sys#181
Reviewed-on: https://go-review.googlesource.com/c/sys/+/540075
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gopher Robot <gobot@golang.org>

unix/ioctl_linux.go

diff --git a/unix/ioctl_linux.go b/unix/ioctl_linux.go
index 0d12c08..dbe680e 100644
--- a/unix/ioctl_linux.go
+++ b/unix/ioctl_linux.go
@@ -231,3 +231,8 @@
 func IoctlLoopSetStatus64(fd int, value *LoopInfo64) error {
 	return ioctlPtr(fd, LOOP_SET_STATUS64, unsafe.Pointer(value))
 }
+
+// IoctlLoopConfigure configures all loop device parameters in a single step
+func IoctlLoopConfigure(fd int, value *LoopConfig) error {
+	return ioctlPtr(fd, LOOP_CONFIGURE, unsafe.Pointer(value))
+}

unix/linux/types.go

diff --git a/unix/linux/types.go b/unix/linux/types.go
index 47c06ee..9297fcf 100644
--- a/unix/linux/types.go
+++ b/unix/linux/types.go
@@ -3027,6 +3027,7 @@
 
 type LoopInfo C.struct_loop_info
 type LoopInfo64 C.struct_loop_info64
+type LoopConfig C.struct_loop_config
 
 // AF_TIPC
 

unix/mkerrors.sh

diff --git a/unix/mkerrors.sh b/unix/mkerrors.sh
index 5dda445..6202638 100755
--- a/unix/mkerrors.sh
+++ b/unix/mkerrors.sh
@@ -519,6 +519,7 @@
 		$2 ~ /^LOCK_(SH|EX|NB|UN)$/ ||
 		$2 ~ /^LO_(KEY|NAME)_SIZE$/ ||
 		$2 ~ /^LOOP_(CLR|CTL|GET|SET)_/ ||
+		$2 == "LOOP_CONFIGURE" ||
 		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|TCP|MCAST|EVFILT|NOTE|SHUT|PROT|MAP|MREMAP|MFD|T?PACKET|MSG|SCM|MCL|DT|MADV|PR|LOCAL|TCPOPT|UDP)_/ ||
 		$2 ~ /^NFC_(GENL|PROTO|COMM|RF|SE|DIRECTION|LLCP|SOCKPROTO)_/ ||
 		$2 ~ /^NFC_.*_(MAX)?SIZE$/ ||

unix/zerrors_linux.go

diff --git a/unix/zerrors_linux.go b/unix/zerrors_linux.go
index 1781cfc..c73cfe2 100644
--- a/unix/zerrors_linux.go
+++ b/unix/zerrors_linux.go
@@ -1801,6 +1801,7 @@
 	LOCK_SH                                     = 0x1
 	LOCK_UN                                     = 0x8
 	LOOP_CLR_FD                                 = 0x4c01
+	LOOP_CONFIGURE                              = 0x4c0a
 	LOOP_CTL_ADD                                = 0x4c80
 	LOOP_CTL_GET_FREE                           = 0x4c82
 	LOOP_CTL_REMOVE                             = 0x4c81

unix/ztypes_linux.go

diff --git a/unix/ztypes_linux.go b/unix/ztypes_linux.go
index b07276a..bbf8399 100644
--- a/unix/ztypes_linux.go
+++ b/unix/ztypes_linux.go
@@ -3005,6 +3005,12 @@
 	Encrypt_key      [32]uint8
 	Init             [2]uint64
 }
+type LoopConfig struct {
+	Fd   uint32
+	Size uint32
+	Info LoopInfo64
+	_    [8]uint64
+}
 
 type TIPCSocketAddr struct {
 	Ref  uint32