netif_testing(9)

🌸 NETIF_TESTING 💅

okay bestie, so this is a page from the Kernel API Manual — section 9, the kernel-internals girlies — and it's all about one tiny little helper called netif_testing. she's small, she's sweet, she's got exactly one job and she does it. periodt. 🎀

---

✨ NAME ✨

netif_testing — literally just test if a device is under test 🧚

---

🌈 SYNOPSIS 🌈

bool netif_testing (const struct net_device *dev );

---

🦋 ARGUMENTS 🦋

• dev — the network device in question. that's it, that's the whole arg. she takes one (1) pointer to a const struct net_device and she's not greedy about it 💜

---

👑 DESCRIPTION 👑

okay so the entire personality of this function is: check if the device is under test. that's the vibe. that's the whole function. she looks at dev and tells you yes or no — returns a bool, no cap.

highkey beautiful in its simplicity ngl 😭 no side quests, no extra lore, she just answers the question. main character energy but make it a one-liner. slay.

---

🔥 SEE ALSO 🔥

buckle up bestie, the friend group here is huge — she's linked to the whole netdevice.h clique, iykyk:

• Kernel file ./include/linux/netdevice.h
• struct gro_node(9)
• napi_is_scheduled(9)
• napi_schedule(9)
• napi_schedule_irqoff(9)
• napi_complete_done(9)
• napi_synchronize(9)
• napi_if_scheduled_mark_missed(9)
• enum netdev_priv_flags(9)
• struct net_device(9)
• netdev_priv(9)
• netdev_from_priv(9)
• netif_napi_add(9)
• netif_napi_add_config(9)
• netif_napi_add_tx(9)
• __netif_napi_del(9)
• netif_napi_del(9)
• netif_start_queue(9)
• netif_wake_queue(9)
• netif_stop_queue(9)
• netif_queue_stopped(9)
• netdev_queue_set_dql_min_limit(9)
• netdev_txq_bql_enqueue_prefetchw(9)
• netdev_txq_bql_complete_prefetchw(9)
• netdev_tx_sent_queue(9)
• netdev_sent_queue(9)
• netdev_tx_completed_queue(9)
• netdev_completed_queue(9)
• netdev_tx_reset_subqueue(9)
• netdev_reset_queue(9)
• netdev_cap_txqueue(9)
• netif_running(9)
• netif_start_subqueue(9)
• netif_stop_subqueue(9)
• __netif_subqueue_stopped(9)
• netif_subqueue_stopped(9)
• netif_wake_subqueue(9)
• netif_attr_test_mask(9)
• netif_attr_test_online(9)
• netif_attrmask_next(9)
• netif_attrmask_next_and(9)
• netif_is_multiqueue(9)
• dev_hold(9)
• dev_put(9)
• linkwatch_sync_dev(9)
• netif_carrier_ok(9)
• netif_dormant_on(9)
• netif_dormant_off(9)
• netif_dormant(9)
• netif_testing_on(9)
• netif_testing_off(9)
• netif_oper_up(9)
• netif_device_present(9)
• netif_tx_lock(9)
• __dev_uc_sync(9)
• __dev_uc_unsync(9)
• __dev_mc_sync(9)
• __dev_mc_unsync(9)

like… she knows everyone. going through her contact list is a whole journey 💀 but every single one of them is listed above, bestie, I would never gatekeep 🫶

---

ngl there's not a lot of drama on this page — no warnings, no undefined behaviour, no exit statuses, just a bool and a dream ✨

---

and that's the whole page! mwah 💋 this lil gem lives in ./include/linux, dated October 2026, and she answers to the name netif_testing(9). bye bestie, go test some devices 💖🎀🌟