Gleb Smirnoff a6b55ee6be net: replace IFF_KNOWSEPOCH with IFF_NEEDSEPOCH ... Expect that drivers call into the network stack with the net epoch entered. This has already been the fact since early 2020. The net interrupts, that are marked with INTR_TYPE_NET, were entering epoch since 511d1afb6b. For the taskqueues there is NET_TASK_INIT() and all drivers that were known back in 2020 we marked with it in 6c3e93cb5a. However in e87c494015 we took conservative approach and preferred to opt-in rather than opt-out for the epoch. This change not only reverts e87c494015 but adds a safety belt to avoid panicing with INVARIANTS if there is a missed driver. With INVARIANTS we will run in_epoch() check, print a warning and enter the net epoch. A driver that prints can be quickly fixed with the IFF_NEEDSEPOCH flag, but better be augmented to properly enter the epoch itself. Note on TCP LRO: it is a backdoor to enter the TCP stack bypassing some layers of net stack, ignoring either old IFF_KNOWSEPOCH or the new IFF_NEEDSEPOCH. But the tcp_lro_flush_all() asserts the presence of network epoch. Indeed, all NIC drivers that support LRO already provide the epoch, either with help of INTR_TYPE_NET or just running NET_EPOCH_ENTER() in their code. Reviewed by: zlei, gallatin, erj Differential Revision: https://reviews.freebsd.org/D39510		2023-04-17 09:08:35 -07:00
..
freebsd32	Regen	2023-04-04 16:19:08 +03:00
ia32	Retire sv_transtrap	2022-05-20 14:54:03 +03:00
lindebugfs	lindebugfs: Add debugfs_create_file_size()	2023-01-25 23:23:16 +01:00
linprocfs	linux(4): Migrate to IfAPI	2023-03-04 12:11:38 +03:00
linsysfs	linsysfs(4): Reimplement listnics() using ifAPI	2023-04-03 11:22:16 +03:00
linux	net: replace IFF_KNOWSEPOCH with IFF_NEEDSEPOCH	2023-04-17 09:08:35 -07:00
linuxkpi	linuxkpi: Add a few more dummy includes	2023-04-04 14:11:32 +02:00
x86bios	pmap_unmapdev/bios: Accept a pointer instead of a vm_offset_t.	2022-09-22 15:08:52 -07:00