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Diffstat (limited to 'src/network/networkd-brvlan.c')
-rw-r--r--src/network/networkd-brvlan.c335
1 files changed, 335 insertions, 0 deletions
diff --git a/src/network/networkd-brvlan.c b/src/network/networkd-brvlan.c
new file mode 100644
index 0000000000..77c08d090c
--- /dev/null
+++ b/src/network/networkd-brvlan.c
@@ -0,0 +1,335 @@
+/***
+ This file is part of systemd.
+
+ Copyright (C) 2016 BISDN GmbH. All rights reserved.
+
+ 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 <netinet/in.h>
+#include <linux/if_bridge.h>
+#include <stdbool.h>
+
+#include "alloc-util.h"
+#include "conf-parser.h"
+#include "netlink-util.h"
+#include "networkd-brvlan.h"
+#include "networkd.h"
+#include "parse-util.h"
+#include "vlan-util.h"
+
+static bool is_bit_set(unsigned bit, uint32_t scope) {
+ assert(bit < sizeof(scope)*8);
+ return scope & (1 << bit);
+}
+
+static inline void set_bit(unsigned nr, uint32_t *addr) {
+ if (nr < BRIDGE_VLAN_BITMAP_MAX)
+ addr[nr / 32] |= (((uint32_t) 1) << (nr % 32));
+}
+
+static inline int is_vid_valid(unsigned vid) {
+ if (vid > VLANID_MAX || vid == 0)
+ return -EINVAL;
+ return 0;
+}
+
+static int find_next_bit(int i, uint32_t x) {
+ int j;
+
+ if (i >= 32)
+ return -1;
+
+ /* find first bit */
+ if (i < 0)
+ return BUILTIN_FFS_U32(x);
+
+ /* mask off prior finds to get next */
+ j = __builtin_ffs(x >> i);
+ return j ? j + i : 0;
+}
+
+static int append_vlan_info_data(Link *const link, sd_netlink_message *req, uint16_t pvid, const uint32_t *br_vid_bitmap, const uint32_t *br_untagged_bitmap) {
+ struct bridge_vlan_info br_vlan;
+ int i, j, k, r, done, cnt;
+ uint16_t begin, end;
+ bool untagged;
+
+ assert(link);
+ assert(req);
+ assert(br_vid_bitmap);
+ assert(br_untagged_bitmap);
+
+ i = cnt = -1;
+
+ begin = end = UINT16_MAX;
+ for (k = 0; k < BRIDGE_VLAN_BITMAP_LEN; k++) {
+ unsigned base_bit;
+ uint32_t vid_map = br_vid_bitmap[k];
+ uint32_t untagged_map = br_untagged_bitmap[k];
+
+ base_bit = k * 32;
+ i = -1;
+ done = 0;
+ do {
+ j = find_next_bit(i, vid_map);
+ if (j > 0) {
+ /* first hit of any bit */
+ if (begin == UINT16_MAX && end == UINT16_MAX) {
+ begin = end = j - 1 + base_bit;
+ untagged = is_bit_set(j - 1, untagged_map);
+ goto next;
+ }
+
+ /* this bit is a continuation of prior bits */
+ if (j - 2 + base_bit == end && untagged == is_bit_set(j - 1, untagged_map) && (uint16_t)j - 1 + base_bit != pvid && (uint16_t)begin != pvid) {
+ end++;
+ goto next;
+ }
+ } else
+ done = 1;
+
+ if (begin != UINT16_MAX) {
+ cnt++;
+ if (done && k < BRIDGE_VLAN_BITMAP_LEN - 1)
+ break;
+
+ br_vlan.flags = 0;
+ if (untagged)
+ br_vlan.flags |= BRIDGE_VLAN_INFO_UNTAGGED;
+
+ if (begin == end) {
+ br_vlan.vid = begin;
+
+ if (begin == pvid)
+ br_vlan.flags |= BRIDGE_VLAN_INFO_PVID;
+
+ r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan));
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
+ } else {
+ br_vlan.vid = begin;
+ br_vlan.flags |= BRIDGE_VLAN_INFO_RANGE_BEGIN;
+
+ r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan));
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
+
+ br_vlan.vid = end;
+ br_vlan.flags &= ~BRIDGE_VLAN_INFO_RANGE_BEGIN;
+ br_vlan.flags |= BRIDGE_VLAN_INFO_RANGE_END;
+
+ r = sd_netlink_message_append_data(req, IFLA_BRIDGE_VLAN_INFO, &br_vlan, sizeof(br_vlan));
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append IFLA_BRIDGE_VLAN_INFO attribute: %m");
+ }
+
+ if (done)
+ break;
+ }
+ if (j > 0) {
+ begin = end = j - 1 + base_bit;
+ untagged = is_bit_set(j - 1, untagged_map);
+ }
+
+ next:
+ i = j;
+ } while(!done);
+ }
+ if (!cnt)
+ return -EINVAL;
+
+ return cnt;
+}
+
+static int set_brvlan_handler(sd_netlink *rtnl, sd_netlink_message *m, void *userdata) {
+ Link *link = userdata;
+ int r;
+
+ assert(link);
+
+ r = sd_netlink_message_get_errno(m);
+ if (r < 0 && r != -EEXIST)
+ log_link_error_errno(link, r, "Could not add VLAN to bridge port: %m");
+
+ return 1;
+}
+
+int br_vlan_configure(Link *link, uint16_t pvid, uint32_t *br_vid_bitmap, uint32_t *br_untagged_bitmap) {
+ _cleanup_(sd_netlink_message_unrefp) sd_netlink_message *req = NULL;
+ int r;
+ uint16_t flags;
+ sd_netlink *rtnl;
+
+ assert(link);
+ assert(link->manager);
+ assert(br_vid_bitmap);
+ assert(br_untagged_bitmap);
+ assert(link->network);
+
+ /* pvid might not be in br_vid_bitmap yet */
+ if (pvid)
+ set_bit(pvid, br_vid_bitmap);
+
+ rtnl = link->manager->rtnl;
+
+ /* create new RTM message */
+ r = sd_rtnl_message_new_link(rtnl, &req, RTM_SETLINK, link->ifindex);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not allocate RTM_SETLINK message: %m");
+
+ r = sd_rtnl_message_link_set_family(req, PF_BRIDGE);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not set message family: %m");
+
+ r = sd_netlink_message_open_container(req, IFLA_AF_SPEC);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not open IFLA_AF_SPEC container: %m");
+
+ /* master needs flag self */
+ if (!link->network->bridge) {
+ flags = BRIDGE_FLAGS_SELF;
+ sd_netlink_message_append_data(req, IFLA_BRIDGE_FLAGS, &flags, sizeof(uint16_t));
+ }
+
+ /* add vlan info */
+ r = append_vlan_info_data(link, req, pvid, br_vid_bitmap, br_untagged_bitmap);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not append VLANs: %m");
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not close IFLA_AF_SPEC container: %m");
+
+ /* send message to the kernel */
+ r = sd_netlink_call_async(rtnl, req, set_brvlan_handler, link, 0, NULL);
+ if (r < 0)
+ return log_link_error_errno(link, r, "Could not send rtnetlink message: %m");
+
+ return 0;
+}
+
+static int parse_vid_range(const char *rvalue, uint16_t *vid, uint16_t *vid_end) {
+ int r;
+ char *p;
+ char *_rvalue = NULL;
+ uint16_t _vid = UINT16_MAX;
+ uint16_t _vid_end = UINT16_MAX;
+
+ assert(rvalue);
+ assert(vid);
+ assert(vid_end);
+
+ _rvalue = strdupa(rvalue);
+ p = strchr(_rvalue, '-');
+ if (p) {
+ *p = '\0';
+ p++;
+ r = parse_vlanid(_rvalue, &_vid);
+ if (r < 0)
+ return r;
+
+ if (!_vid)
+ return -ERANGE;
+
+ r = parse_vlanid(p, &_vid_end);
+ if (r < 0)
+ return r;
+
+ if (!_vid_end)
+ return -ERANGE;
+ } else {
+ r = parse_vlanid(_rvalue, &_vid);
+ if (r < 0)
+ return r;
+
+ if (!_vid)
+ return -ERANGE;
+ }
+
+ *vid = _vid;
+ *vid_end = _vid_end;
+ return r;
+}
+
+int config_parse_brvlan_vlan(const char *unit, const char *filename,
+ unsigned line, const char *section,
+ unsigned section_line, const char *lvalue,
+ int ltype, const char *rvalue, void *data,
+ void *userdata) {
+ Network *network = userdata;
+ int r;
+ uint16_t vid, vid_end;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = parse_vid_range(rvalue, &vid, &vid_end);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Failed to parse VLAN, ignoring: %s", rvalue);
+ return 0;
+ }
+
+ if (UINT16_MAX == vid_end)
+ set_bit(vid++, network->br_vid_bitmap);
+ else {
+ if (vid >= vid_end) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid VLAN range, ignoring %s", rvalue);
+ return 0;
+ }
+ for (; vid <= vid_end; vid++)
+ set_bit(vid, network->br_vid_bitmap);
+ }
+ return 0;
+}
+
+int config_parse_brvlan_untagged(const char *unit, const char *filename,
+ unsigned line, const char *section,
+ unsigned section_line, const char *lvalue,
+ int ltype, const char *rvalue, void *data,
+ void *userdata) {
+ Network *network = userdata;
+ int r;
+ uint16_t vid, vid_end;
+
+ assert(filename);
+ assert(section);
+ assert(lvalue);
+ assert(rvalue);
+ assert(data);
+
+ r = parse_vid_range(rvalue, &vid, &vid_end);
+ if (r < 0) {
+ log_syntax(unit, LOG_ERR, filename, line, r, "Could not parse VLAN: %s", rvalue);
+ return 0;
+ }
+
+ if (UINT16_MAX == vid_end) {
+ set_bit(vid, network->br_vid_bitmap);
+ set_bit(vid, network->br_untagged_bitmap);
+ } else {
+ if (vid >= vid_end) {
+ log_syntax(unit, LOG_ERR, filename, line, 0, "Invalid VLAN range, ignoring %s", rvalue);
+ return 0;
+ }
+ for (; vid <= vid_end; vid++) {
+ set_bit(vid, network->br_vid_bitmap);
+ set_bit(vid, network->br_untagged_bitmap);
+ }
+ }
+ return 0;
+}
generated by cgit v1.2.3-54-g00ecf (git 2.45.2) at 2024-11-23 04:20:49 +0000