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netdevsim: add dummy macsec offload
When the kernel is compiled with MACsec support, add the NETIF_F_HW_MACSEC feature to netdevsim devices and implement macsec_ops. To allow easy testing of failure from the device, support is limited to 3 SecY's per netdevsim device, and 1 RXSC per SecY. v2: - nsim_macsec_add_secy, return -ENOSPC if secy_count isn't full but we can't find an empty slot (Simon Horman) - add sci_to_cpu to make sparse happy (Simon Horman) - remove set but not used secy variable (kernel test robot and Simon Horman) Signed-off-by: Sabrina Dubroca <sd@queasysnail.net> Reviewed-by: Simon Horman <simon.horman@corigine.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Sabrina Dubroca
committed by
David S. Miller
David S. Miller
parent
633d76ad01
commit
02b34d03a2
356
drivers/net/netdevsim/macsec.c
Normal file
356
drivers/net/netdevsim/macsec.c
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@@ -0,0 +1,356 @@
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// SPDX-License-Identifier: GPL-2.0
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#include <net/macsec.h>
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#include "netdevsim.h"
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static inline u64 sci_to_cpu(sci_t sci)
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{
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return be64_to_cpu((__force __be64)sci);
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}
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static int nsim_macsec_find_secy(struct netdevsim *ns, sci_t sci)
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{
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int i;
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for (i = 0; i < NSIM_MACSEC_MAX_SECY_COUNT; i++) {
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if (ns->macsec.nsim_secy[i].sci == sci)
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return i;
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}
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return -1;
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}
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static int nsim_macsec_find_rxsc(struct nsim_secy *ns_secy, sci_t sci)
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{
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int i;
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for (i = 0; i < NSIM_MACSEC_MAX_RXSC_COUNT; i++) {
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if (ns_secy->nsim_rxsc[i].sci == sci)
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return i;
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}
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return -1;
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}
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static int nsim_macsec_add_secy(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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if (ns->macsec.nsim_secy_count == NSIM_MACSEC_MAX_SECY_COUNT)
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return -ENOSPC;
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for (idx = 0; idx < NSIM_MACSEC_MAX_SECY_COUNT; idx++) {
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if (!ns->macsec.nsim_secy[idx].used)
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break;
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}
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if (idx == NSIM_MACSEC_MAX_SECY_COUNT) {
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netdev_err(ctx->netdev, "%s: nsim_secy_count not full but all SecYs used\n",
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__func__);
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return -ENOSPC;
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}
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netdev_dbg(ctx->netdev, "%s: adding new secy with sci %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->secy->sci), idx);
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ns->macsec.nsim_secy[idx].used = true;
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ns->macsec.nsim_secy[idx].nsim_rxsc_count = 0;
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ns->macsec.nsim_secy[idx].sci = ctx->secy->sci;
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ns->macsec.nsim_secy_count++;
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return 0;
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}
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static int nsim_macsec_upd_secy(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: updating secy with sci %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->secy->sci), idx);
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return 0;
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}
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static int nsim_macsec_del_secy(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: removing SecY with SCI %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->secy->sci), idx);
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ns->macsec.nsim_secy[idx].used = false;
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memset(&ns->macsec.nsim_secy[idx], 0, sizeof(ns->macsec.nsim_secy[idx]));
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ns->macsec.nsim_secy_count--;
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return 0;
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}
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static int nsim_macsec_add_rxsc(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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if (secy->nsim_rxsc_count == NSIM_MACSEC_MAX_RXSC_COUNT)
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return -ENOSPC;
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for (idx = 0; idx < NSIM_MACSEC_MAX_RXSC_COUNT; idx++) {
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if (!secy->nsim_rxsc[idx].used)
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break;
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}
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if (idx == NSIM_MACSEC_MAX_RXSC_COUNT)
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netdev_err(ctx->netdev, "%s: nsim_rxsc_count not full but all RXSCs used\n",
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__func__);
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netdev_dbg(ctx->netdev, "%s: adding new rxsc with sci %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->rx_sc->sci), idx);
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secy->nsim_rxsc[idx].used = true;
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secy->nsim_rxsc[idx].sci = ctx->rx_sc->sci;
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secy->nsim_rxsc_count++;
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return 0;
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}
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static int nsim_macsec_upd_rxsc(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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idx = nsim_macsec_find_rxsc(secy, ctx->rx_sc->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in RXSC table\n",
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__func__, sci_to_cpu(ctx->rx_sc->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: updating RXSC with sci %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->rx_sc->sci), idx);
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return 0;
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}
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static int nsim_macsec_del_rxsc(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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idx = nsim_macsec_find_rxsc(secy, ctx->rx_sc->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in RXSC table\n",
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__func__, sci_to_cpu(ctx->rx_sc->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: removing RXSC with sci %08llx at index %d\n",
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__func__, sci_to_cpu(ctx->rx_sc->sci), idx);
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secy->nsim_rxsc[idx].used = false;
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memset(&secy->nsim_rxsc[idx], 0, sizeof(secy->nsim_rxsc[idx]));
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secy->nsim_rxsc_count--;
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return 0;
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}
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static int nsim_macsec_add_rxsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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idx = nsim_macsec_find_rxsc(secy, ctx->sa.rx_sa->sc->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in RXSC table\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: RXSC with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci), ctx->sa.assoc_num);
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return 0;
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}
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static int nsim_macsec_upd_rxsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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idx = nsim_macsec_find_rxsc(secy, ctx->sa.rx_sa->sc->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in RXSC table\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: RXSC with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci), ctx->sa.assoc_num);
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return 0;
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}
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static int nsim_macsec_del_rxsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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struct nsim_secy *secy;
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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secy = &ns->macsec.nsim_secy[idx];
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idx = nsim_macsec_find_rxsc(secy, ctx->sa.rx_sa->sc->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in RXSC table\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: RXSC with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->sa.rx_sa->sc->sci), ctx->sa.assoc_num);
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return 0;
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}
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static int nsim_macsec_add_txsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: SECY with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->secy->sci), ctx->sa.assoc_num);
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return 0;
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}
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static int nsim_macsec_upd_txsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: SECY with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->secy->sci), ctx->sa.assoc_num);
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return 0;
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}
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static int nsim_macsec_del_txsa(struct macsec_context *ctx)
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{
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struct netdevsim *ns = netdev_priv(ctx->netdev);
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int idx;
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idx = nsim_macsec_find_secy(ns, ctx->secy->sci);
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if (idx < 0) {
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netdev_err(ctx->netdev, "%s: sci %08llx not found in secy table\n",
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__func__, sci_to_cpu(ctx->secy->sci));
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return -ENOENT;
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}
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netdev_dbg(ctx->netdev, "%s: SECY with sci %08llx, AN %u\n",
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__func__, sci_to_cpu(ctx->secy->sci), ctx->sa.assoc_num);
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return 0;
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}
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static const struct macsec_ops nsim_macsec_ops = {
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.mdo_add_secy = nsim_macsec_add_secy,
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.mdo_upd_secy = nsim_macsec_upd_secy,
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.mdo_del_secy = nsim_macsec_del_secy,
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.mdo_add_rxsc = nsim_macsec_add_rxsc,
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.mdo_upd_rxsc = nsim_macsec_upd_rxsc,
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.mdo_del_rxsc = nsim_macsec_del_rxsc,
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.mdo_add_rxsa = nsim_macsec_add_rxsa,
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.mdo_upd_rxsa = nsim_macsec_upd_rxsa,
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.mdo_del_rxsa = nsim_macsec_del_rxsa,
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.mdo_add_txsa = nsim_macsec_add_txsa,
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.mdo_upd_txsa = nsim_macsec_upd_txsa,
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.mdo_del_txsa = nsim_macsec_del_txsa,
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};
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void nsim_macsec_init(struct netdevsim *ns)
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{
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ns->netdev->macsec_ops = &nsim_macsec_ops;
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ns->netdev->features |= NETIF_F_HW_MACSEC;
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memset(&ns->macsec, 0, sizeof(ns->macsec));
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}
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void nsim_macsec_teardown(struct netdevsim *ns)
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{
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}
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