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netdevsim: migrate to dstats stats collection

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Replace custom statistics tracking with the kernel's dstats infrastructure
to simplify code and improve consistency with other network drivers.

This change:
- Sets dev->pcpu_stat_type = NETDEV_PCPU_STAT_DSTATS for automatic
  automatic allocation and deallocation.
- Removes manual stats fields and their update
- Replaces custom nsim_get_stats64() with dev_get_stats()
- Uses dev_dstats_tx_add() and dev_dstats_tx_dropped() helpers
- Eliminates the need for manual synchronization primitives

The dstats framework provides the same functionality with less code.

Suggested-by: Jakub Kicinski <kuba@kernel.org>
Reviewed-by: Joe Damato <joe@dama.to>
Signed-off-by: Breno Leitao <leitao@debian.org>
Link: https://patch.msgid.link/20250618-netdevsim_stat-v4-1-19fe0d35e28e@debian.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Breno Leitao
2025-06-18 01:32:42 -07:00
committed by Jakub Kicinski
parent c3ee72ded0
commit f9e2511d80
2 changed files with 6 additions and 32 deletions
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5
drivers/net/netdevsim/netdevsim.h
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@@ -108,11 +108,6 @@ struct netdevsim {
int rq_reset_mode;
u64 tx_packets;
u64 tx_bytes;
u64 tx_dropped;
struct u64_stats_sync syncp;
struct nsim_bus_dev *nsim_bus_dev;
struct bpf_prog *bpf_offloaded;