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unix: add mount_setattr support for linux

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This brings in mount_setattr(2) support, added to Linux 5.12 kernel and
documented at https://man7.org/linux/man-pages/man2/mount_setattr.2.html

Change-Id: I5609980c18aef80f9429a8c8cec8c1e129f74ab7
Reviewed-on: https://go-review.googlesource.com/c/sys/+/363444
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
This commit is contained in:
Kir Kolyshkin
2021-11-16 06:13:58 +00:00
committed by Tobias Klauser
parent 0c823b97ae
commit 0a5406a544
6 changed files with 54 additions and 1 deletions
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unix/syscall_linux.go
+10
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@@ -1775,6 +1775,16 @@ func Mount(source string, target string, fstype string, flags uintptr, data stri
return mount(source, target, fstype, flags, datap)
}
//sys mountSetattr(dirfd int, pathname string, flags uint, attr *MountAttr, size uintptr) (err error) = SYS_MOUNT_SETATTR
// MountSetattr is a wrapper for mount_setattr(2).
// https://man7.org/linux/man-pages/man2/mount_setattr.2.html
//
// Requires kernel >= 5.12.
func MountSetattr(dirfd int, pathname string, flags uint, attr *MountAttr) error {
return mountSetattr(dirfd, pathname, flags, attr, unsafe.Sizeof(*attr))
}
func Sendfile(outfd int, infd int, offset *int64, count int) (written int, err error) {
if raceenabled {
raceReleaseMerge(unsafe.Pointer(&ioSync))