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2740 Commits

Author SHA1 Message Date
Josh Bleecher Snyder 0132d52e9a make tests psas 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder ed0f50f924 split into several files 
file for file stuff
tun for tun stuff
udp for udp stuff
io_uring for general uring stuff

also make build tags suffice
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder dd94b37ef3 remove completed TODO 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder c7cd8a7bae docs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 5023b6b0c3 make ipv4/ipv6 code parallel 
and thus more clearly correct
weirdly, since it is using unsafe
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 152038cabd simplify, docs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 8a7b42a557 move code around 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 8478d34cca doc and improve shutdown refcounting 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f329d69fb4 docs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder a1a2fb9181 more whitespace 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 4847a89ecf spit. not so much polish. 2021-07-13 15:15:16 -07:00
kadmin 58c556ad15 net/uring: add go ntohs 
Instead of calling out to C for ntohs, just implement it in Go for effiency.

Signed-off-by: kadmin <julianknodt@gmail.com>
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 334c09ab19 comment more 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 3e6e5a2eee incorporate recvOut into recvReqs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 6ec3378f7b remove more dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 385f86e85f document, cull dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 52ccff8835 WIP: clean shutdown for UDP conn 
this appears to work, most of the time.
there's lots of documentation work remaining,
thinking through the structure remaining,
testing remaining,
porting to file remaining (if appropriate).
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 2118b821cd remove dead code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 1e3e5fd8e7 overhaul error handling of peek/waitcompletion 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder e0d8dcf3eb refactor 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder c1bc58defc set sin_family (oops) 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 7cb1369b19 remove some TODOs, make ip address extraction equally awful 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f274a0cfab simplify change point 
at the cost of some very, very naughty unsafe
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f71ff18c11 convert manual tests into automated tests 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 961a23b9df tewak 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f27a61502d start cleaning up code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder a98ed81f2e ipv6 support, UNTESTED, super hacky 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 275cb37031 comments 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 9559752cb5 fix io_uring tun device reads 
Well that's an interesting one!
Apparently if you issue multiple concurrent preadv calls on
a TUN device using io_uring, the TUN device falls over.

Possibly corrupting memory along the way.
Which might be why the kernel hung on shutdown...
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 78dbd02718 make it easy to toggle uring on/off 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 4d58223422 switch file.go to test reads instead of writes 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder b05f305eaf simpler init 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder e337ed2033 stick closer to upstream tun reading code 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 0fb656794c make cgo pointer rules happy 
well that was a mess
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 283614d5e9 use io_uring for sendmsg 
and clean up some dead code and unify some things
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 11036e23a1 disable polling for now 
we'll maybe bring it back with a token bucket or something.
and/or do multi-sqe submission.
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 522fa9306e they work with extra junk 
thanks, dave
no thanks, kernel devs

write no work
use writev
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 7fd5e31070 tun writes...not working yet (but why not??) 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder a03ee93e21 use polling instead of syscall 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 56ba714e10 smush together two return values from C 
avoids a per-packet alloc

i will atone for my sins later

if only C let you return multiple values.
or Go let you pass in a pointer w/o it being on the heap.
 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder bb78cf81b6 keep 8 requests in the queue at all times 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 38a872d2c1 remove all allocs 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 6ef301e787 remove all allocations 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 48e338130e mve sockaddr_in to Go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 56ece41326 move iovec to go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 53117d9761 sheesh 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder f75d32151b move msghdr to Go 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder fcdc9086a2 use io_uring 2021-07-13 15:15:16 -07:00
Josh Bleecher Snyder 4f4dae32dd wgengine/magicsock: fix latent data race in test 
logBufWriter had no serialization.
It just so happens that none of its users currently ever log concurrently.
Make it safe for concurrent use.

Signed-off-by: Josh Bleecher Snyder <josh@tailscale.com>
 2021-07-13 15:14:18 -07:00
Brad Fitzpatrick 01e159b610 ipn/ipnlocal: save prefs to disk on UpdatePrefs 
Regression from 6d10655dc3, which added
UpdatePrefs but didn't write it out to disk.

I'd planned on adding tests to state_test.go which is why I'd earlier
added 46896a9311 to prepare for making
such persistence tests easier to write, but turns out state_test.go
didn't even test UpdatePrefs, so I'm staying out of there.
Instead, this is tested using integration tests.

Fixes #2321

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
 2021-07-13 15:01:38 -07:00