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ip-address: Support filtering by slave type, too

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This patch allows to query all interfaces enslaved to a bridge or bond
using the following syntax:

| ip addr show type bridge_slave

Filtering has to be done in userspace since the kernel does not support
filtering on IFLA_INFO_SLAVE_KIND.

Functionality introduced in this patch is not fully complete since it
does not allow to match on type and slave type at the same time, but it
doesn't prevent implementing a dedicated slave_type match, either.

Signed-off-by: Phil Sutter <phil@nwl.cc>
This commit is contained in:
Phil Sutter 2016-06-28 15:07:16 +02:00 committed by Stephen Hemminger
parent 62000e51e0
commit e0513807f6
1 changed files with 30 additions and 22 deletions
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52
ip/ipaddress.c
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@ -61,6 +61,7 @@ static struct
int group;
int master;
char *kind;
char *slave_kind;
} filter;
static int do_link;
@ -206,18 +207,27 @@ static void print_linkmode(FILE *f, struct rtattr *tb)
fprintf(f, "mode %s ", link_modes[mode]);
}
static char *parse_link_kind(struct rtattr *tb)
static char *parse_link_kind(struct rtattr *tb, bool slave)
{
struct rtattr *linkinfo[IFLA_INFO_MAX+1];
int attr = slave ? IFLA_INFO_SLAVE_KIND : IFLA_INFO_KIND;
parse_rtattr_nested(linkinfo, IFLA_INFO_MAX, tb);
if (linkinfo[IFLA_INFO_KIND])
return RTA_DATA(linkinfo[IFLA_INFO_KIND]);
if (linkinfo[attr])
return RTA_DATA(linkinfo[attr]);
return "";
}
static int match_link_kind(struct rtattr **tb, char *kind, bool slave)
{
if (!tb[IFLA_LINKINFO])
return -1;
return strcmp(parse_link_kind(tb[IFLA_LINKINFO], slave), kind);
}
static void print_linktype(FILE *fp, struct rtattr *tb)
{
struct rtattr *linkinfo[IFLA_INFO_MAX+1];
@ -680,16 +690,11 @@ int print_linkinfo_brief(const struct sockaddr_nl *who,
} else if (filter.master > 0)
return -1;
if (filter.kind) {
if (tb[IFLA_LINKINFO]) {
char *kind = parse_link_kind(tb[IFLA_LINKINFO]);
if (filter.kind && match_link_kind(tb, filter.kind, 0))
return -1;
if (strcmp(kind, filter.kind))
return -1;
} else {
return -1;
}
}
if (filter.slave_kind && match_link_kind(tb, filter.slave_kind, 1))
return -1;
if (n->nlmsg_type == RTM_DELLINK)
fprintf(fp, "Deleted ");
@ -781,16 +786,11 @@ int print_linkinfo(const struct sockaddr_nl *who,
} else if (filter.master > 0)
return -1;
if (filter.kind) {
if (tb[IFLA_LINKINFO]) {
char *kind = parse_link_kind(tb[IFLA_LINKINFO]);
if (filter.kind && match_link_kind(tb, filter.kind, 0))
return -1;
if (strcmp(kind, filter.kind))
return -1;
} else {
return -1;
}
}
if (filter.slave_kind && match_link_kind(tb, filter.slave_kind, 1))
return -1;
if (n->nlmsg_type == RTM_DELLINK)
fprintf(fp, "Deleted ");
@ -1621,8 +1621,16 @@ static int ipaddr_list_flush_or_save(int argc, char **argv, int action)
invarg("Device does not exist\n", *argv);
filter.master = ifindex;
} else if (strcmp(*argv, "type") == 0) {
int soff;
NEXT_ARG();
filter.kind = *argv;
soff = strlen(*argv) - strlen("_slave");
if (!strcmp(*argv + soff, "_slave")) {
(*argv)[soff] = '\0';
filter.slave_kind = *argv;
} else {
filter.kind = *argv;
}
} else {
if (strcmp(*argv, "dev") == 0) {
NEXT_ARG();