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-rw-r--r--src/spdk/lib/net/interface.c551
1 files changed, 551 insertions, 0 deletions
diff --git a/src/spdk/lib/net/interface.c b/src/spdk/lib/net/interface.c
new file mode 100644
index 000000000..358cbc308
--- /dev/null
+++ b/src/spdk/lib/net/interface.c
@@ -0,0 +1,551 @@
+/*-
+ * BSD LICENSE
+ *
+ * Copyright (c) Intel Corporation.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "net_internal.h"
+
+#include "spdk/stdinc.h"
+#include "spdk/string.h"
+
+#include "spdk/log.h"
+#include "spdk/net.h"
+
+#ifdef __linux__ /* Interface management is Linux-specific */
+
+#include <linux/netlink.h>
+#include <linux/rtnetlink.h>
+
+static TAILQ_HEAD(, spdk_interface) g_interface_head;
+
+static pthread_mutex_t interface_lock = PTHREAD_MUTEX_INITIALIZER;
+
+static int get_ifc_ipv4(void)
+{
+ int ret;
+ int rtattrlen;
+ int netlink_fd;
+ uint32_t ipv4_addr;
+
+ struct {
+ struct nlmsghdr n;
+ struct ifaddrmsg r;
+ struct rtattr rta;
+ } req;
+ char buf[16384];
+ struct nlmsghdr *nlmp;
+ struct ifaddrmsg *rtmp;
+ struct rtattr *rtatp;
+ struct spdk_interface *ifc;
+
+ netlink_fd = socket(PF_NETLINK, SOCK_DGRAM, NETLINK_ROUTE);
+ if (netlink_fd < 0) {
+ SPDK_ERRLOG("socket failed!\n");
+ return 1;
+ }
+
+ /*
+ * Prepare a message structure
+ */
+ memset(&req, 0, sizeof(req));
+ req.n.nlmsg_len = NLMSG_LENGTH(sizeof(struct ifaddrmsg));
+ req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_ROOT;
+ req.n.nlmsg_type = RTM_GETADDR;
+
+ /* IPv4 only */
+ req.r.ifa_family = AF_INET;
+
+ /*
+ * Fill up all the attributes for the rtnetlink header.
+ */
+ assert(&req.rta == (struct rtattr *)(((char *)&req) + NLMSG_ALIGN(req.n.nlmsg_len)));
+ req.rta.rta_len = RTA_LENGTH(16);
+
+ /* Send and recv the message from kernel */
+ ret = send(netlink_fd, &req, req.n.nlmsg_len, 0);
+ if (ret < 0) {
+ SPDK_ERRLOG("netlink send failed: %s\n", spdk_strerror(errno));
+ ret = 1;
+ goto exit;
+ }
+
+ ret = recv(netlink_fd, buf, sizeof(buf), 0);
+ if (ret <= 0) {
+ SPDK_ERRLOG("netlink recv failed: %s\n", spdk_strerror(errno));
+ ret = 1;
+ goto exit;
+ }
+
+ for (nlmp = (struct nlmsghdr *)buf; ret > (int)sizeof(*nlmp);) {
+ int len = nlmp->nlmsg_len;
+ int req_len = len - sizeof(*nlmp);
+
+ if (req_len < 0 || len > ret) {
+ SPDK_ERRLOG("error\n");
+ ret = 1;
+ goto exit;
+ }
+
+ if (!NLMSG_OK(nlmp, (uint32_t)ret)) {
+ SPDK_ERRLOG("NLMSG not OK\n");
+ ret = 1;
+ goto exit;
+ }
+
+ rtmp = (struct ifaddrmsg *)NLMSG_DATA(nlmp);
+ rtatp = (struct rtattr *)IFA_RTA(rtmp);
+
+ rtattrlen = IFA_PAYLOAD(nlmp);
+
+ for (; RTA_OK(rtatp, rtattrlen); rtatp = RTA_NEXT(rtatp, rtattrlen)) {
+ if (rtatp->rta_type == IFA_LOCAL) {
+ memcpy(&ipv4_addr, (struct in_addr *)RTA_DATA(rtatp),
+ sizeof(struct in_addr));
+ TAILQ_FOREACH(ifc, &g_interface_head, tailq) {
+ if (ifc->index == rtmp->ifa_index) {
+ /* add a new IP address to interface */
+ if (ifc->num_ip_addresses >= SPDK_MAX_IP_PER_IFC) {
+ SPDK_ERRLOG("SPDK: number of IP addresses supported for %s excceded. limit=%d\n",
+ ifc->name,
+ SPDK_MAX_IP_PER_IFC);
+ break;
+ }
+ ifc->ip_address[ifc->num_ip_addresses] = ipv4_addr;
+ ifc->num_ip_addresses++;
+ break;
+ }
+ }
+ }
+ }
+ ret -= NLMSG_ALIGN(len);
+ nlmp = (struct nlmsghdr *)((char *)nlmp + NLMSG_ALIGN(len));
+ }
+ ret = 0;
+
+exit:
+ close(netlink_fd);
+ return ret;
+}
+
+
+static int process_new_interface_msg(struct nlmsghdr *h)
+{
+ int len;
+ struct spdk_interface *ifc;
+ struct ifinfomsg *iface;
+ struct rtattr *attribute;
+
+ iface = (struct ifinfomsg *)NLMSG_DATA(h);
+
+ ifc = (struct spdk_interface *) malloc(sizeof(*ifc));
+ if (ifc == NULL) {
+ SPDK_ERRLOG("Malloc failed\n");
+ return 1;
+ }
+
+ memset(ifc, 0, sizeof(*ifc));
+
+ /* Set interface index */
+ ifc->index = iface->ifi_index;
+
+ len = h->nlmsg_len - NLMSG_LENGTH(sizeof(*iface));
+
+ /* Loop over all attributes for the NEWLINK message */
+ for (attribute = IFLA_RTA(iface); RTA_OK(attribute, len); attribute = RTA_NEXT(attribute, len)) {
+ switch (attribute->rta_type) {
+ case IFLA_IFNAME:
+ if (if_indextoname(iface->ifi_index, ifc->name) == NULL) {
+ SPDK_ERRLOG("Indextoname failed!\n");
+ free(ifc);
+ return 2;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ TAILQ_INSERT_TAIL(&g_interface_head, ifc, tailq);
+ return 0;
+}
+
+static int prepare_ifc_list(void)
+{
+ int ret = 0;
+ struct nl_req_s {
+ struct nlmsghdr hdr;
+ struct rtgenmsg gen;
+ struct ifinfomsg ifi;
+ };
+ int netlink_fd;
+ struct sockaddr_nl local; /* Our local (user space) side of the communication */
+ struct sockaddr_nl kernel; /* The remote (kernel space) side of the communication */
+
+ struct msghdr rtnl_msg; /* Generic msghdr struct for use with sendmsg */
+ struct iovec io; /* IO vector for sendmsg */
+
+ struct nl_req_s req; /* Structure that describes the rtnetlink packet itself */
+ char reply[16384]; /* a large buffer to receive lots of link information */
+
+ pid_t pid = getpid(); /* Our process ID to build the correct netlink address */
+ int end = 0; /* some flag to end loop parsing */
+
+ /*
+ * Prepare netlink socket for kernel/user space communication
+ */
+ netlink_fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (netlink_fd < 0) {
+ SPDK_ERRLOG("socket failed!\n");
+ return 1;
+ }
+
+ memset(&local, 0, sizeof(local)); /* Fill-in local address information */
+ local.nl_family = AF_NETLINK;
+ local.nl_pid = pid;
+ local.nl_groups = 0;
+
+ /* RTNL socket is ready to use, prepare and send L2 request. */
+ memset(&rtnl_msg, 0, sizeof(rtnl_msg));
+ memset(&kernel, 0, sizeof(kernel));
+ memset(&req, 0, sizeof(req));
+
+ kernel.nl_family = AF_NETLINK; /* Fill-in kernel address (destination of our message) */
+
+ req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
+ req.hdr.nlmsg_type = RTM_GETLINK;
+ req.hdr.nlmsg_flags = NLM_F_REQUEST | NLM_F_DUMP;
+ req.hdr.nlmsg_seq = 1;
+ req.hdr.nlmsg_pid = pid;
+
+ req.ifi.ifi_family = AF_UNSPEC;
+ req.ifi.ifi_type = 1;
+
+ io.iov_base = &req;
+ io.iov_len = req.hdr.nlmsg_len;
+ rtnl_msg.msg_iov = &io;
+ rtnl_msg.msg_iovlen = 1;
+ rtnl_msg.msg_name = &kernel;
+ rtnl_msg.msg_namelen = sizeof(kernel);
+
+ if (sendmsg(netlink_fd, &rtnl_msg, 0) == -1) {
+ SPDK_ERRLOG("Sendmsg failed!\n");
+ ret = 1;
+ goto exit;
+ }
+
+ /* Parse reply */
+ while (!end) {
+ int len;
+ struct nlmsghdr *msg_ptr; /* Pointer to current message part */
+
+ struct msghdr rtnl_reply; /* Generic msghdr structure for use with recvmsg */
+ struct iovec io_reply;
+
+ memset(&io_reply, 0, sizeof(io_reply));
+ memset(&rtnl_reply, 0, sizeof(rtnl_reply));
+
+ io.iov_base = reply;
+ io.iov_len = 8192;
+ rtnl_reply.msg_iov = &io;
+ rtnl_reply.msg_iovlen = 1;
+ rtnl_reply.msg_name = &kernel;
+ rtnl_reply.msg_namelen = sizeof(kernel);
+
+ /* Read as much data as fits in the receive buffer */
+ len = recvmsg(netlink_fd, &rtnl_reply, 0);
+ if (len) {
+ for (msg_ptr = (struct nlmsghdr *) reply; NLMSG_OK(msg_ptr, (uint32_t)len);
+ msg_ptr = NLMSG_NEXT(msg_ptr, len)) {
+ switch (msg_ptr->nlmsg_type) {
+ case NLMSG_DONE: /* This is the special meaning NLMSG_DONE message we asked for by using NLM_F_DUMP flag */
+ end++;
+ break;
+ case RTM_NEWLINK: /* This is a RTM_NEWLINK message, which contains lots of information about a link */
+ ret = process_new_interface_msg(msg_ptr);
+ if (ret != 0) {
+ goto exit;
+ }
+ break;
+ default:
+ break;
+ }
+ }
+ }
+ }
+exit:
+ close(netlink_fd);
+ return ret;
+}
+
+static struct spdk_interface *
+interface_find_by_index(uint32_t ifc_index)
+{
+ struct spdk_interface *ifc_entry;
+
+ /* Mutex must has benn held by the caller */
+ TAILQ_FOREACH(ifc_entry, &g_interface_head, tailq) {
+ if (ifc_entry->index == ifc_index) {
+ return ifc_entry;
+ }
+ }
+
+ return NULL;
+}
+
+static int netlink_addr_msg(uint32_t ifc_idx, uint32_t ip_address, uint32_t create)
+{
+ int fd;
+ struct sockaddr_nl la;
+ struct sockaddr_nl pa;
+ struct msghdr msg;
+ struct iovec iov;
+ int ifal;
+ struct {
+ struct nlmsghdr n;
+ struct ifaddrmsg r;
+ char buf[16384];
+ } req;
+ struct rtattr *rta;
+
+ fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
+ if (fd < 0) {
+ SPDK_ERRLOG("socket failed!\n");
+ return errno;
+ }
+
+ /* setup local address & bind using this address. */
+ bzero(&la, sizeof(la));
+ la.nl_family = AF_NETLINK;
+ la.nl_pid = getpid();
+ bind(fd, (struct sockaddr *) &la, sizeof(la));
+
+ /* initialize RTNETLINK request buffer. */
+ bzero(&req, sizeof(req));
+
+ /* compute the initial length of the service request. */
+ ifal = sizeof(struct ifaddrmsg);
+
+ /* add first attrib: set IP addr and RTNETLINK buffer size. */
+ rta = (struct rtattr *) req.buf;
+ rta->rta_type = IFA_ADDRESS;
+ rta->rta_len = sizeof(struct rtattr) + 4;
+ memcpy(((char *)rta) + sizeof(struct rtattr), &ip_address, sizeof(ip_address));
+ ifal += rta->rta_len;
+
+ /* add second attrib. */
+ rta = (struct rtattr *)(((char *)rta) + rta->rta_len);
+ rta->rta_type = IFA_LOCAL;
+ rta->rta_len = sizeof(struct rtattr) + 4;
+ memcpy(((char *)rta) + sizeof(struct rtattr), &ip_address, sizeof(ip_address));
+ ifal += rta->rta_len;
+
+ /* setup the NETLINK header. */
+ req.n.nlmsg_len = NLMSG_LENGTH(ifal);
+ if (create) {
+ req.n.nlmsg_flags = NLM_F_REQUEST | NLM_F_CREATE | NLM_F_APPEND;
+ req.n.nlmsg_type = RTM_NEWADDR;
+ } else {
+ req.n.nlmsg_flags = NLM_F_REQUEST;
+ req.n.nlmsg_type = RTM_DELADDR;
+ }
+
+ /* setup the service header (struct rtmsg). */
+ req.r.ifa_family = AF_INET;
+ req.r.ifa_prefixlen = 32; /* hardcoded */
+ req.r.ifa_flags = IFA_F_PERMANENT | IFA_F_SECONDARY;
+ req.r.ifa_index = ifc_idx;
+ req.r.ifa_scope = 0;
+
+ /* create the remote address to communicate. */
+ bzero(&pa, sizeof(pa));
+ pa.nl_family = AF_NETLINK;
+
+ /* initialize & create the struct msghdr supplied to the sendmsg() function. */
+ bzero(&msg, sizeof(msg));
+ msg.msg_name = (void *) &pa;
+ msg.msg_namelen = sizeof(pa);
+
+ /* place the pointer & size of the RTNETLINK message in the struct msghdr. */
+ iov.iov_base = (void *) &req.n;
+ iov.iov_len = req.n.nlmsg_len;
+ msg.msg_iov = &iov;
+ msg.msg_iovlen = 1;
+ /* send the RTNETLINK message to kernel. */
+ sendmsg(fd, &msg, 0);
+ close(fd);
+ return 0;
+}
+
+static void interface_ip_update(void)
+{
+ struct spdk_interface *ifc_entry;
+
+ pthread_mutex_lock(&interface_lock);
+ TAILQ_FOREACH(ifc_entry, &g_interface_head, tailq) {
+ ifc_entry->num_ip_addresses = 0;
+ memset(ifc_entry->ip_address, 0, sizeof(ifc_entry->ip_address));
+ }
+ get_ifc_ipv4();
+ pthread_mutex_unlock(&interface_lock);
+}
+
+static int
+interface_is_ip_address_in_use(int ifc_index, uint32_t addr, bool add)
+{
+ struct spdk_interface *ifc_entry;
+ bool in_use = false;
+ uint32_t idx = 0;
+
+ interface_ip_update();
+
+ pthread_mutex_lock(&interface_lock);
+ ifc_entry = interface_find_by_index(ifc_index);
+ if (ifc_entry == NULL) {
+ pthread_mutex_unlock(&interface_lock);
+ return -ENODEV;
+ }
+
+ for (idx = 0; idx < ifc_entry->num_ip_addresses; idx++) {
+ if (ifc_entry->ip_address[idx] == addr) {
+ in_use = true;
+ break;
+ }
+ }
+ pthread_mutex_unlock(&interface_lock);
+
+ /* The IP address to add is alerady in use */
+ if (add == true && in_use == true) {
+ return -EADDRINUSE;
+ }
+
+ /* The IP address to delete is not in use */
+ if (add == false && in_use == false) {
+ return -ENXIO;
+ }
+
+ return 0;
+}
+
+int
+spdk_interface_init(void)
+{
+ int rc = 0;
+
+ TAILQ_INIT(&g_interface_head);
+ rc = prepare_ifc_list();
+ if (!rc) {
+ rc = get_ifc_ipv4();
+ }
+
+ return rc;
+}
+
+void
+spdk_interface_destroy(void)
+{
+ struct spdk_interface *ifc_entry;
+
+ while (!TAILQ_EMPTY(&g_interface_head)) {
+ ifc_entry = TAILQ_FIRST(&g_interface_head);
+ TAILQ_REMOVE(&g_interface_head, ifc_entry, tailq);
+ free(ifc_entry);
+ }
+}
+
+int
+interface_net_interface_add_ip_address(int ifc_index, char *ip_addr)
+{
+ uint32_t addr;
+ int ret;
+
+ addr = inet_addr(ip_addr);
+
+ ret = interface_is_ip_address_in_use(ifc_index, addr, true);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return netlink_addr_msg(ifc_index, addr, 1);
+}
+
+int
+interface_net_interface_delete_ip_address(int ifc_index, char *ip_addr)
+{
+ uint32_t addr;
+ int ret;
+
+ addr = inet_addr(ip_addr);
+
+ ret = interface_is_ip_address_in_use(ifc_index, addr, false);
+ if (ret < 0) {
+ return ret;
+ }
+
+ return netlink_addr_msg(ifc_index, addr, 0);
+}
+
+void *interface_get_list(void)
+{
+ interface_ip_update();
+ return &g_interface_head;
+}
+
+#else /* Not Linux */
+
+int
+spdk_interface_init(void)
+{
+ return 0;
+}
+
+void
+spdk_interface_destroy(void)
+{
+}
+
+int
+interface_net_interface_add_ip_address(int ifc_index, char *ip_addr)
+{
+ return -1;
+}
+
+int
+interface_net_interface_delete_ip_address(int ifc_index, char *ip_addr)
+{
+ return -1;
+}
+
+void *
+interface_get_list(void)
+{
+ return NULL;
+}
+
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-15 16:48:18 +0000