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2020-09-02Merge release-20200818.0-113-g0ca0d8e01 (automated)gVisor bot
2020-09-02[vfs] Fix error handling in overlayfs OpenAt.Ayush Ranjan
Updates #1199 PiperOrigin-RevId: 329802274
2020-09-02Merge release-20200818.0-112-g5c6601120 (automated)gVisor bot
2020-09-02Update Go version constraint on sync/spin_unsafe.go.Jamie Liu
PiperOrigin-RevId: 329801584
2020-09-02Merge release-20200818.0-111-g9bd016423 (automated)gVisor bot
2020-09-02Improve sync.SeqCount performance.Jamie Liu
- Make sync.SeqCountEpoch not a struct. This allows sync.SeqCount.BeginRead() to be inlined. - Mark sync.SeqAtomicLoad<T> nosplit to mitigate the Go compiler's refusal to inline it. (Best I could get was "cost 92 exceeds budget 80".) - Use runtime-guided spinning in SeqCount.BeginRead(). Benchmarks: name old time/op new time/op delta pkg:pkg/sync/sync goos:linux goarch:amd64 SeqCountWriteUncontended-12 8.24ns ± 0% 11.40ns ± 0% +38.35% (p=0.000 n=10+10) SeqCountReadUncontended-12 0.33ns ± 0% 0.14ns ± 3% -57.77% (p=0.000 n=7+8) pkg:pkg/sync/seqatomictest/seqatomic goos:linux goarch:amd64 SeqAtomicLoadIntUncontended-12 0.64ns ± 1% 0.41ns ± 1% -36.40% (p=0.000 n=10+8) SeqAtomicTryLoadIntUncontended-12 0.18ns ± 4% 0.18ns ± 1% ~ (p=0.206 n=10+8) AtomicValueLoadIntUncontended-12 0.27ns ± 3% 0.27ns ± 0% -1.77% (p=0.000 n=10+8) (atomic.Value.Load is, of course, inlined. We would expect an uncontended inline SeqAtomicLoad<int> to perform identically to SeqAtomicTryLoad<int>.) The "regression" in BenchmarkSeqCountWriteUncontended, despite this CL changing nothing in that path, is attributed to microarchitectural subtlety; the benchmark loop is unchanged except for its address: Before this CL: :0 0x4e62d1 48ffc2 INCQ DX :0 0x4e62d4 48399110010000 CMPQ DX, 0x110(CX) :0 0x4e62db 7e26 JLE 0x4e6303 :0 0x4e62dd 90 NOPL :0 0x4e62de bb01000000 MOVL $0x1, BX :0 0x4e62e3 f00fc118 LOCK XADDL BX, 0(AX) :0 0x4e62e7 ffc3 INCL BX :0 0x4e62e9 0fbae300 BTL $0x0, BX :0 0x4e62ed 733a JAE 0x4e6329 :0 0x4e62ef 90 NOPL :0 0x4e62f0 bb01000000 MOVL $0x1, BX :0 0x4e62f5 f00fc118 LOCK XADDL BX, 0(AX) :0 0x4e62f9 ffc3 INCL BX :0 0x4e62fb 0fbae300 BTL $0x0, BX :0 0x4e62ff 73d0 JAE 0x4e62d1 After this CL: :0 0x4e6361 48ffc2 INCQ DX :0 0x4e6364 48399110010000 CMPQ DX, 0x110(CX) :0 0x4e636b 7e26 JLE 0x4e6393 :0 0x4e636d 90 NOPL :0 0x4e636e bb01000000 MOVL $0x1, BX :0 0x4e6373 f00fc118 LOCK XADDL BX, 0(AX) :0 0x4e6377 ffc3 INCL BX :0 0x4e6379 0fbae300 BTL $0x0, BX :0 0x4e637d 733a JAE 0x4e63b9 :0 0x4e637f 90 NOPL :0 0x4e6380 bb01000000 MOVL $0x1, BX :0 0x4e6385 f00fc118 LOCK XADDL BX, 0(AX) :0 0x4e6389 ffc3 INCL BX :0 0x4e638b 0fbae300 BTL $0x0, BX :0 0x4e638f 73d0 JAE 0x4e6361 PiperOrigin-RevId: 329754148
2020-09-02Merge release-20200818.0-110-gb9b6660dc (automated)gVisor bot
2020-09-02Merge release-20200818.0-109-g8ab08cdc0 (automated)gVisor bot
2020-09-02Merge release-20200818.0-108-ga0e431038 (automated)gVisor bot
2020-09-02Merge release-20200818.0-106-g563f28b7d (automated)gVisor bot
2020-09-02Merge release-20200818.0-105-g37a217aca (automated)gVisor bot
2020-09-01Implement setattr+clunk in 9PFabricio Voznika
This is to cover the common pattern: open->read/write->close, where SetAttr needs to be called to update atime/mtime before the file is closed. Benchmark results: BM_OpenReadClose/10240 CPU setattr+clunk: 63783 ns VFS2: 68109 ns VFS1: 72507 ns Updates #1198 PiperOrigin-RevId: 329628461
2020-09-02Merge release-20200818.0-104-g40faeaa18 (automated)gVisor bot
2020-09-01Fix handling of unacceptable ACKs during close.Mithun Iyer
On receiving an ACK with unacceptable ACK number, in a closing state, TCP, needs to reply back with an ACK with correct seq and ack numbers and remain in same state. This change is as per RFC793 page 37, but with a difference that it does not apply to ESTABLISHED state, just as in Linux. Also add more tests to check for OTW sequence number and unacceptable ack numbers in these states. Fixes #3785 PiperOrigin-RevId: 329616283
2020-09-02Merge release-20200818.0-103-gc67d8ece0 (automated)gVisor bot
2020-09-01Merge release-20200818.0-102-g2eaf54dd5 (automated)gVisor bot
2020-09-01Refactor tty codebase to use master-replica terminology.Ayush Ranjan
Updates #2972 PiperOrigin-RevId: 329584905
2020-09-01Merge release-20200818.0-101-g04c284f8c (automated)gVisor bot
2020-09-01Fix panic when calling dup2().Nayana Bidari
PiperOrigin-RevId: 329572337
2020-09-01Merge release-20200818.0-100-g723fb5c11 (automated)gVisor bot
2020-09-01[go-marshal] Enable auto-marshalling for fs/tty.Ayush Ranjan
PiperOrigin-RevId: 329564614
2020-09-01Merge release-20200818.0-99-g71589b7f7 (automated)gVisor bot
2020-09-01Merge release-20200818.0-98-g0eae08bc9 (automated)gVisor bot
2020-09-01Automated rollback of changelist 328350576Nayana Bidari
PiperOrigin-RevId: 329526153
2020-09-01Merge release-20200818.0-97-gf4be726fd (automated)gVisor bot
2020-09-01Merge release-20200818.0-96-g674843849 (automated)gVisor bot
2020-09-01Merge release-20200818.0-95-g101c97d6f (automated)gVisor bot
2020-08-31Merge release-20200818.0-94-g170560cec (automated)gVisor bot
2020-08-31Merge release-20200818.0-93-g6cdfa4fee (automated)gVisor bot
2020-08-31Don't use read-only host FD for writable gofer dentries in VFS2.Jamie Liu
As documented for gofer.dentry.hostFD. PiperOrigin-RevId: 329372319
2020-08-31Merge release-20200818.0-92-g9d0d82088 (automated)gVisor bot
2020-08-31Merge release-20200818.0-91-g911cecaa3 (automated)gVisor bot
2020-08-31Implement walk in gvisor verity fsgVisor bot
Implement walk directories in gvisor verity file system. For each step, the child dentry is verified against a verified parent root hash. PiperOrigin-RevId: 329358747
2020-08-31Merge release-20200818.0-90-gba25485d9 (automated)gVisor bot
2020-08-31stateify: Bring back struct field and type names in pretty printTing-Yu Wang
PiperOrigin-RevId: 329349158
2020-08-31Merge release-20200818.0-89-ga3d189301 (automated)gVisor bot
2020-08-29Merge release-20200818.0-88-g3bee863ae (automated)gVisor bot
2020-08-29Merge release-20200818.0-87-gf6ddcbefa (automated)gVisor bot
2020-08-28Fix kernfs.Dentry reference leak.Nicolas Lacasse
PiperOrigin-RevId: 329036994
2020-08-28Merge release-20200818.0-86-gd3057717d (automated)gVisor bot
2020-08-28Merge release-20200818.0-85-gd5787f628 (automated)gVisor bot
2020-08-28Don't bind loopback to all IPs in an IPv6 subnetGhanan Gowripalan
An earlier change considered the loopback bound to all addresses in an assigned subnet. This should have only be done for IPv4 to maintain compatability with Linux: ``` $ ip addr show dev lo 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group ... link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00 inet 127.0.0.1/8 scope host lo valid_lft forever preferred_lft forever inet6 ::1/128 scope host valid_lft forever preferred_lft forever $ ping 2001:db8::1 PING 2001:db8::1(2001:db8::1) 56 data bytes ^C --- 2001:db8::1 ping statistics --- 4 packets transmitted, 0 received, 100% packet loss, time 3062ms $ ping 2001:db8::2 PING 2001:db8::2(2001:db8::2) 56 data bytes ^C --- 2001:db8::2 ping statistics --- 3 packets transmitted, 0 received, 100% packet loss, time 2030ms $ sudo ip addr add 2001:db8::1/64 dev lo $ ping 2001:db8::1 PING 2001:db8::1(2001:db8::1) 56 data bytes 64 bytes from 2001:db8::1: icmp_seq=1 ttl=64 time=0.055 ms 64 bytes from 2001:db8::1: icmp_seq=2 ttl=64 time=0.074 ms 64 bytes from 2001:db8::1: icmp_seq=3 ttl=64 time=0.073 ms 64 bytes from 2001:db8::1: icmp_seq=4 ttl=64 time=0.071 ms ^C --- 2001:db8::1 ping statistics --- 4 packets transmitted, 4 received, 0% packet loss, time 3075ms rtt min/avg/max/mdev = 0.055/0.068/0.074/0.007 ms $ ping 2001:db8::2 PING 2001:db8::2(2001:db8::2) 56 data bytes From 2001:db8::1 icmp_seq=1 Destination unreachable: No route From 2001:db8::1 icmp_seq=2 Destination unreachable: No route From 2001:db8::1 icmp_seq=3 Destination unreachable: No route From 2001:db8::1 icmp_seq=4 Destination unreachable: No route ^C --- 2001:db8::2 ping statistics --- 4 packets transmitted, 0 received, +4 errors, 100% packet loss, time 3070ms ``` Test: integration_test.TestLoopbackAcceptAllInSubnet PiperOrigin-RevId: 329011566
2020-08-28Merge release-20200818.0-84-gb4820e598 (automated)gVisor bot
2020-08-28Implement StatFS for various VFS2 filesystems.Rahat Mahmood
This mainly involved enabling kernfs' client filesystems to provide a StatFS implementation. Fixes #3411, #3515. PiperOrigin-RevId: 329009864
2020-08-28Merge release-20200818.0-83-gbdd5996a7 (automated)gVisor bot
2020-08-28Improve type safety for network protocol optionsGhanan Gowripalan
The existing implementation for NetworkProtocol.{Set}Option take arguments of an empty interface type which all types (implicitly) implement; any type may be passed to the functions. This change introduces marker interfaces for network protocol options that may be set or queried which network protocol option types implement to ensure that invalid types are caught at compile time. Different interfaces are used to allow the compiler to enforce read-only or set-only socket options. PiperOrigin-RevId: 328980359
2020-08-28Merge release-20200818.0-82-g8b9cb36d1 (automated)gVisor bot
2020-08-28Fix EOF handling for splice.Dean Deng
Also, add corresponding EOF tests for splice/sendfile. Discovered by syzkaller. PiperOrigin-RevId: 328975990
2020-08-28Merge release-20200818.0-81-gb3ff31d04 (automated)gVisor bot
2020-08-28fix panic when calling SO_ORIGINAL_DST without initializing iptablesKevin Krakauer
Reported-by: syzbot+074ec22c42305725b79f@syzkaller.appspotmail.com PiperOrigin-RevId: 328963899
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