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netdevsim: implement psp device stats

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For now only tx/rx packets/bytes are reported. This is not compliant
with the PSP Architecture Specification.

Signed-off-by: Daniel Zahka <daniel.zahka@gmail.com>
Link: https://patch.msgid.link/20251106002608.1578518-6-daniel.zahka@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Zahka
2025-11-05 16:26:06 -08:00
committed by Jakub Kicinski
parent b1346219e5
commit 178f0763c5
2 changed files with 32 additions and 0 deletions
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5
drivers/net/netdevsim/netdevsim.h
View File

@@ -109,6 +109,11 @@ struct netdevsim {
int rq_reset_mode;
struct {
u64 rx_packets;
u64 rx_bytes;
u64 tx_packets;
u64 tx_bytes;
struct u64_stats_sync syncp;
struct psp_dev *dev;
u32 spi;
u32 assoc_cnt;

27
drivers/net/netdevsim/psp.c
View File

@@ -70,6 +70,13 @@ nsim_do_psp(struct sk_buff *skb, struct netdevsim *ns,
*psp_ext = skb->extensions;
refcount_inc(&(*psp_ext)->refcnt);
skb->decrypted = 1;
u64_stats_update_begin(&ns->psp.syncp);
ns->psp.tx_packets++;
ns->psp.rx_packets++;
ns->psp.tx_bytes += skb->len - skb_inner_transport_offset(skb);
ns->psp.rx_bytes += skb->len - skb_inner_transport_offset(skb);
u64_stats_update_end(&ns->psp.syncp);
} else {
struct ipv6hdr *ip6h __maybe_unused;
struct iphdr *iph;
@@ -164,12 +171,32 @@ static void nsim_assoc_del(struct psp_dev *psd, struct psp_assoc *pas)
ns->psp.assoc_cnt--;
}
static void nsim_get_stats(struct psp_dev *psd, struct psp_dev_stats *stats)
{
struct netdevsim *ns = psd->drv_priv;
unsigned int start;
/* WARNING: do *not* blindly zero stats in real drivers!
* All required stats must be reported by the device!
*/
memset(stats, 0, sizeof(struct psp_dev_stats));
do {
start = u64_stats_fetch_begin(&ns->psp.syncp);
stats->rx_bytes = ns->psp.rx_bytes;
stats->rx_packets = ns->psp.rx_packets;
stats->tx_bytes = ns->psp.tx_bytes;
stats->tx_packets = ns->psp.tx_packets;
} while (u64_stats_fetch_retry(&ns->psp.syncp, start));
}
static struct psp_dev_ops nsim_psp_ops = {
.set_config = nsim_psp_set_config,
.rx_spi_alloc = nsim_rx_spi_alloc,
.tx_key_add = nsim_assoc_add,
.tx_key_del = nsim_assoc_del,
.key_rotate = nsim_key_rotate,
.get_stats = nsim_get_stats,
};
static struct psp_dev_caps nsim_psp_caps = {