Isolation of udev code from remaining systemd

This commit is a first attempt to isolate the udev code from the
remaining code base.  It intentionally does not modify any files
but purely delete files which, on a first examination, appear to
not be needed.  This is a sweeping commit which may easily have
missed needed code.  Files can be retrieved by doing a checkout
from the previous commit:

 git checkout 2944f347d0 -- <filename>

1 files changed, 0 insertions, 317 deletions

diff --git a/src/core/loopback-setup.c b/src/core/loopback-setup.c
deleted file mode 100644
index 065b75a6e3..0000000000
--- a/src/core/loopback-setup.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
-  This file is part of systemd.
-
-  Copyright 2010 Lennart Poettering
-
-  systemd is free software; you can redistribute it and/or modify it
-  under the terms of the GNU Lesser General Public License as published by
-  the Free Software Foundation; either version 2.1 of the License, or
-  (at your option) any later version.
-
-  systemd is distributed in the hope that it will be useful, but
-  WITHOUT ANY WARRANTY; without even the implied warranty of
-  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
-  Lesser General Public License for more details.
-
-  You should have received a copy of the GNU Lesser General Public License
-  along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-#include <errno.h>
-#include <sys/socket.h>
-#include <net/if.h>
-#include <asm/types.h>
-#include <netinet/in.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <linux/netlink.h>
-#include <linux/rtnetlink.h>
-
-#include "util.h"
-#include "macro.h"
-#include "loopback-setup.h"
-#include "socket-util.h"
-
-#define NLMSG_TAIL(nmsg)                                                \
-        ((struct rtattr *) (((uint8_t*) (nmsg)) + NLMSG_ALIGN((nmsg)->nlmsg_len)))
-
-static int add_rtattr(struct nlmsghdr *n, size_t max_length, int type, const void *data, size_t data_length) {
-        size_t length;
-        struct rtattr *rta;
-
-        length = RTA_LENGTH(data_length);
-
-        if (NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length) > max_length)
-                return -E2BIG;
-
-        rta = NLMSG_TAIL(n);
-        rta->rta_type = type;
-        rta->rta_len = length;
-        memcpy(RTA_DATA(rta), data, data_length);
-        n->nlmsg_len = NLMSG_ALIGN(n->nlmsg_len) + RTA_ALIGN(length);
-
-        return 0;
-}
-
-static ssize_t sendto_loop(int fd, const void *buf, size_t buf_len, int flags, const struct sockaddr *sa, socklen_t sa_len) {
-
-        for (;;) {
-                ssize_t l;
-
-                l = sendto(fd, buf, buf_len, flags, sa, sa_len);
-                if (l >= 0)
-                        return l;
-
-                if (errno != EINTR)
-                        return -errno;
-        }
-}
-
-static ssize_t recvfrom_loop(int fd, void *buf, size_t buf_len, int flags, struct sockaddr *sa, socklen_t *sa_len) {
-
-        for (;;) {
-                ssize_t l;
-
-                l = recvfrom(fd, buf, buf_len, flags, sa, sa_len);
-                if (l >= 0)
-                        return l;
-
-                if (errno != EINTR)
-                        return -errno;
-        }
-}
-
-static int add_adresses(int fd, int if_loopback, unsigned *requests) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_nl nl;
-        } sa;
-        union {
-                struct nlmsghdr header;
-                uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-                            NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
-                            RTA_LENGTH(sizeof(struct in6_addr))];
-        } request;
-
-        struct ifaddrmsg *ifaddrmsg;
-        uint32_t ipv4_address = htonl(INADDR_LOOPBACK);
-        int r;
-
-        zero(request);
-
-        request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-        request.header.nlmsg_type = RTM_NEWADDR;
-        request.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_CREATE|NLM_F_ACK;
-        request.header.nlmsg_seq = *requests + 1;
-
-        ifaddrmsg = NLMSG_DATA(&request.header);
-        ifaddrmsg->ifa_family = AF_INET;
-        ifaddrmsg->ifa_prefixlen = 8;
-        ifaddrmsg->ifa_flags = IFA_F_PERMANENT;
-        ifaddrmsg->ifa_scope = RT_SCOPE_HOST;
-        ifaddrmsg->ifa_index = if_loopback;
-
-        r = add_rtattr(&request.header, sizeof(request), IFA_LOCAL, &ipv4_address, sizeof(ipv4_address));
-        if (r < 0)
-                return r;
-
-        zero(sa);
-        sa.nl.nl_family = AF_NETLINK;
-
-        if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
-                return -errno;
-        (*requests)++;
-
-        if (!socket_ipv6_is_supported())
-                return 0;
-
-        request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
-        request.header.nlmsg_seq = *requests + 1;
-
-        ifaddrmsg->ifa_family = AF_INET6;
-        ifaddrmsg->ifa_prefixlen = 128;
-
-        r = add_rtattr(&request.header, sizeof(request), IFA_LOCAL, &in6addr_loopback, sizeof(in6addr_loopback));
-        if (r < 0)
-                return r;
-
-        if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
-                return -errno;
-        (*requests)++;
-
-        return 0;
-}
-
-static int start_interface(int fd, int if_loopback, unsigned *requests) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_nl nl;
-        } sa;
-        union {
-                struct nlmsghdr header;
-                uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-                            NLMSG_ALIGN(sizeof(struct ifinfomsg))];
-        } request;
-
-        struct ifinfomsg *ifinfomsg;
-
-        zero(request);
-
-        request.header.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifinfomsg));
-        request.header.nlmsg_type = RTM_NEWLINK;
-        request.header.nlmsg_flags = NLM_F_REQUEST|NLM_F_ACK;
-        request.header.nlmsg_seq = *requests + 1;
-
-        ifinfomsg = NLMSG_DATA(&request.header);
-        ifinfomsg->ifi_family = AF_UNSPEC;
-        ifinfomsg->ifi_index = if_loopback;
-        ifinfomsg->ifi_flags = IFF_UP;
-        ifinfomsg->ifi_change = IFF_UP;
-
-        zero(sa);
-        sa.nl.nl_family = AF_NETLINK;
-
-        if (sendto_loop(fd, &request, request.header.nlmsg_len, 0, &sa.sa, sizeof(sa)) < 0)
-                return -errno;
-
-        (*requests)++;
-
-        return 0;
-}
-
-static int read_response(int fd, unsigned requests_max) {
-        union {
-                struct sockaddr sa;
-                struct sockaddr_nl nl;
-        } sa;
-        union {
-                struct nlmsghdr header;
-                uint8_t buf[NLMSG_ALIGN(sizeof(struct nlmsghdr)) +
-                            NLMSG_ALIGN(sizeof(struct nlmsgerr))];
-        } response;
-
-        ssize_t l;
-        socklen_t sa_len = sizeof(sa);
-        struct nlmsgerr *nlmsgerr;
-
-        l = recvfrom_loop(fd, &response, sizeof(response), 0, &sa.sa, &sa_len);
-        if (l < 0)
-                return -errno;
-
-        if (sa_len != sizeof(sa.nl) ||
-            sa.nl.nl_family != AF_NETLINK)
-                return -EIO;
-
-        if (sa.nl.nl_pid != 0)
-                return 0;
-
-        if ((size_t) l < sizeof(struct nlmsghdr))
-                return -EIO;
-
-        if (response.header.nlmsg_type != NLMSG_ERROR ||
-            (pid_t) response.header.nlmsg_pid != getpid() ||
-            response.header.nlmsg_seq >= requests_max)
-                return 0;
-
-        if ((size_t) l < NLMSG_LENGTH(sizeof(struct nlmsgerr)) ||
-            response.header.nlmsg_len < NLMSG_LENGTH(sizeof(struct nlmsgerr)))
-                return -EIO;
-
-        nlmsgerr = NLMSG_DATA(&response.header);
-
-        if (nlmsgerr->error < 0 && nlmsgerr->error != -EEXIST)
-                return nlmsgerr->error;
-
-        return response.header.nlmsg_seq;
-}
-
-static int check_loopback(void) {
-        int r, fd;
-        union {
-                struct sockaddr sa;
-                struct sockaddr_in in;
-        } sa;
-
-        /* If we failed to set up the loop back device, check whether
-         * it might already be set up */
-
-        fd = socket(AF_INET, SOCK_DGRAM|SOCK_NONBLOCK|SOCK_CLOEXEC, 0);
-        if (fd < 0)
-                return -errno;
-
-        zero(sa);
-        sa.in.sin_family = AF_INET;
-        sa.in.sin_addr.s_addr = INADDR_LOOPBACK;
-
-        if (bind(fd, &sa.sa, sizeof(sa.in)) >= 0)
-                r = 1;
-        else
-                r = errno == EADDRNOTAVAIL ? 0 : -errno;
-
-        close_nointr_nofail(fd);
-
-        return r;
-}
-
-int loopback_setup(void) {
-        int r, if_loopback;
-        union {
-                struct sockaddr sa;
-                struct sockaddr_nl nl;
-        } sa;
-        unsigned requests = 0, i;
-        int fd;
-        bool eperm = false;
-
-        errno = 0;
-        if_loopback = (int) if_nametoindex("lo");
-        if (if_loopback <= 0)
-                return errno ? -errno : -ENODEV;
-
-        fd = socket(PF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
-        if (fd < 0)
-                return -errno;
-
-        zero(sa);
-        sa.nl.nl_family = AF_NETLINK;
-        if (bind(fd, &sa.sa, sizeof(sa)) < 0) {
-                r = -errno;
-                goto finish;
-        }
-
-        r = add_adresses(fd, if_loopback, &requests);
-        if (r < 0)
-                goto finish;
-
-        r = start_interface(fd, if_loopback, &requests);
-        if (r < 0)
-                goto finish;
-
-        for (i = 0; i < requests; i++) {
-                r = read_response(fd, requests);
-
-                if (r == -EPERM)
-                        eperm = true;
-                else if (r  < 0)
-                        goto finish;
-        }
-
-        if (eperm && check_loopback() < 0) {
-                r = -EPERM;
-                goto finish;
-        }
-
-        r = 0;
-
-finish:
-        if (r < 0)
-                log_warning("Failed to configure loopback device: %s", strerror(-r));
-
-        if (fd >= 0)
-                close_nointr_nofail(fd);
-
-        return r;
-}