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nspawn-network: Split off udev checking from parse_interface.

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This commit is contained in:
Daan De Meyer 2019-12-19 21:16:30 +01:00
parent 10ad50d38c
commit b390f17892
3 changed files with 48 additions and 24 deletions
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58
src/nspawn/nspawn-network.c
View File

@ -395,39 +395,49 @@ int remove_bridge(const char *bridge_name) {
}
static int parse_interface(const char *name) {
_cleanup_(sd_device_unrefp) sd_device *d = NULL;
int ifi, r;
r = parse_ifindex_or_ifname(name, &ifi);
if (r < 0)
return log_error_errno(r, "Failed to resolve interface %s: %m", name);
if (path_is_read_only_fs("/sys") <= 0) {
char ifi_str[2 + DECIMAL_STR_MAX(int)];
/* udev should be around. */
sprintf(ifi_str, "n%i", ifi);
r = sd_device_new_from_device_id(&d, ifi_str);
if (r < 0)
return log_error_errno(r, "Failed to get device %s: %m", name);
r = sd_device_get_is_initialized(d);
if (r < 0)
return log_error_errno(r, "Failed to determine whether interface %s is initialized: %m", name);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Network interface %s is not initialized yet.", name);
r = device_is_renaming(d);
if (r < 0)
return log_error_errno(r, "Failed to determine the interface %s is being renamed: %m", name);
if (r > 0)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Interface %s is being renamed.", name);
}
return ifi;
}
int test_network_interface_initialized(const char *name) {
_cleanup_(sd_device_unrefp) sd_device *d = NULL;
int ifi, r;
char ifi_str[2 + DECIMAL_STR_MAX(int)];
if (path_is_read_only_fs("/sys"))
return 0;
/* udev should be around. */
ifi = parse_interface(name);
if (ifi < 0)
return ifi;
sprintf(ifi_str, "n%i", ifi);
r = sd_device_new_from_device_id(&d, ifi_str);
if (r < 0)
return log_error_errno(r, "Failed to get device %s: %m", name);
r = sd_device_get_is_initialized(d);
if (r < 0)
return log_error_errno(r, "Failed to determine whether interface %s is initialized: %m", name);
if (r == 0)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Network interface %s is not initialized yet.", name);
r = device_is_renaming(d);
if (r < 0)
return log_error_errno(r, "Failed to determine the interface %s is being renamed: %m", name);
if (r > 0)
return log_error_errno(SYNTHETIC_ERRNO(EBUSY), "Interface %s is being renamed.", name);
return 0;
}
int move_network_interfaces(pid_t pid, char **ifaces) {
_cleanup_(sd_netlink_unrefp) sd_netlink *rtnl = NULL;
char **i;

2
src/nspawn/nspawn-network.h
View File

@ -5,6 +5,8 @@
#include <stdbool.h>
#include <sys/types.h>
int test_network_interface_initialized(const char *name);
int setup_veth(const char *machine_name, pid_t pid, char iface_name[IFNAMSIZ], bool bridge);
int setup_veth_extra(const char *machine_name, pid_t pid, char **pairs);

12
src/nspawn/nspawn.c
View File

@ -848,6 +848,10 @@ static int parse_argv(int argc, char *argv[]) {
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"Network interface name not valid: %s", optarg);
r = test_network_interface_initialized(optarg);
if (r < 0)
return r;
if (strv_extend(&arg_network_interfaces, optarg) < 0)
return log_oom();
@ -861,6 +865,10 @@ static int parse_argv(int argc, char *argv[]) {
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"MACVLAN network interface name not valid: %s", optarg);
r = test_network_interface_initialized(optarg);
if (r < 0)
return r;
if (strv_extend(&arg_network_macvlan, optarg) < 0)
return log_oom();
@ -874,6 +882,10 @@ static int parse_argv(int argc, char *argv[]) {
return log_error_errno(SYNTHETIC_ERRNO(EINVAL),
"IPVLAN network interface name not valid: %s", optarg);
r = test_network_interface_initialized(optarg);
if (r < 0)
return r;
if (strv_extend(&arg_network_ipvlan, optarg) < 0)
return log_oom();