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linux: add support for SO_PEERGROUPS

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The su(8) and sudo(8) from Ubuntu Bionic use it.

Sponsored By:	The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D28165
This commit is contained in:
Edward Tomasz Napierala 2021-02-07 21:29:32 +00:00
parent eb8bf6bb42
commit cd84c82c6a
2 changed files with 46 additions and 1 deletions
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46
sys/compat/linux/linux_socket.c
View File

@ -1863,6 +1863,43 @@ linux_setsockopt(struct thread *td, struct linux_setsockopt_args *args)
return (error);
}
static int
linux_getsockopt_so_peergroups(struct thread *td,
struct linux_getsockopt_args *args)
{
struct xucred xu;
socklen_t xulen, len;
int error, i;
xulen = sizeof(xu);
error = kern_getsockopt(td, args->s, 0,
LOCAL_PEERCRED, &xu, UIO_SYSSPACE, &xulen);
if (error != 0)
return (error);
len = xu.cr_ngroups * sizeof(l_gid_t);
if (args->optlen < len) {
error = copyout(&len, PTRIN(args->optlen), sizeof(len));
if (error == 0)
error = ERANGE;
return (error);
}
/*
* "- 1" to skip the primary group.
*/
for (i = 0; i < xu.cr_ngroups - 1; i++) {
error = copyout(xu.cr_groups + i + 1,
(void *)(args->optval + i * sizeof(l_gid_t)),
sizeof(l_gid_t));
if (error != 0)
return (error);
}
error = copyout(&len, PTRIN(args->optlen), sizeof(len));
return (error);
}
static int
linux_getsockopt_so_peersec(struct thread *td,
struct linux_getsockopt_args *args)
@ -1899,8 +1936,15 @@ linux_getsockopt(struct thread *td, struct linux_getsockopt_args *args)
level = linux_to_bsd_sockopt_level(args->level);
switch (level) {
case SOL_SOCKET:
if (args->optname == LINUX_SO_PEERSEC)
switch (args->optname) {
case LINUX_SO_PEERGROUPS:
return (linux_getsockopt_so_peergroups(td, args));
case LINUX_SO_PEERSEC:
return (linux_getsockopt_so_peersec(td, args));
default:
break;
}
name = linux_to_bsd_so_sockopt(args->optname);
switch (name) {
case LOCAL_CREDS_PERSISTENT:

1
sys/compat/linux/linux_socket.h
View File

@ -199,6 +199,7 @@ int linux_accept(struct thread *td, struct linux_accept_args *args);
#define LINUX_SO_SNDBUFFORCE 32
#define LINUX_SO_RCVBUFFORCE 33
#define LINUX_SO_PROTOCOL 38
#define LINUX_SO_PEERGROUPS 59
/* Socket options */
#define LINUX_IP_TOS 1