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2019-05-22Move wait constants to abi/linux packageMichael Pratt
Updates #214 PiperOrigin-RevId: 249483756 Change-Id: I0d3cf4112bed75a863d5eb08c2063fbc506cd875
2019-05-21Clean up pipe internals and add fcntl supportAdin Scannell
Pipe internals are made more efficient by avoiding garbage collection. A pool is now used that can be shared by all pipes, and buffers are chained via an intrusive list. The documentation for pipe structures and methods is also simplified and clarified. The pipe tests are now parameterized, so that they are run on all different variants (named pipes, small buffers, default buffers). The pipe buffer sizes are exposed by fcntl, which is now supported by this change. A size change test has been added to the suite. These new tests uncovered a bug regarding the semantics of open named pipes with O_NONBLOCK, which is also fixed by this CL. This fix also addresses the lack of the O_LARGEFILE flag for named pipes. PiperOrigin-RevId: 249375888 Change-Id: I48e61e9c868aedb0cadda2dff33f09a560dee773
2019-05-21Fix inconsistencies in ELF anonymous mappingsMichael Pratt
* A segment with filesz == 0, memsz > 0 should be an anonymous only mapping. We were failing to load such an ELF. * Anonymous pages are always mapped RW, regardless of the segment protections. PiperOrigin-RevId: 249355239 Change-Id: I251e5c0ce8848cf8420c3aadf337b0d77b1ad991
2019-05-21Refactor fdbased endpoint dispatcher code.Bhasker Hariharan
This is in preparation to support an fdbased endpoint that can read/dispatch packets from multiple underlying fds. Updates #231 PiperOrigin-RevId: 249337074 Change-Id: Id7d375186cffcf55ae5e38986e7d605a96916d35
2019-05-21Add basic plumbing for splice and stub implementation.Adin Scannell
This does not actually implement an efficient splice or sendfile. Rather, it adds a generic plumbing to the file internals so that this can be added. All file implementations use the stub fileutil.NoSplice implementation, which causes sendfile and splice to fall back to an internal copy. A basic splice system call interface is added, along with a test. PiperOrigin-RevId: 249335960 Change-Id: Ic5568be2af0a505c19e7aec66d5af2480ab0939b
2019-05-21Remove unused struct member.Neel Natu
Remove unused struct member. PiperOrigin-RevId: 249300446 Change-Id: Ifb16538f684bc3200342462c3da927eb564bf52d
2019-05-20Forward named pipe creation to the goferMichael Pratt
The backing 9p server must allow named pipe creation, which the runsc fsgofer currently does not. There are small changes to the overlay here. GetFile may block when opening a named pipe, which can cause a deadlock: 1. open(O_RDONLY) -> copyMu.Lock() -> GetFile() 2. open(O_WRONLY) -> copyMu.Lock() -> Deadlock A named pipe usable for writing must already be on the upper filesystem, but we are still taking copyMu for write when checking for upper. That can be changed to a read lock to fix the common case. However, a named pipe on the lower filesystem would still deadlock in open(O_WRONLY) when it tries to actually perform copy up (which would simply return EINVAL). Move the copy up type check before taking copyMu for write to avoid this. p9 must be modified, as it was incorrectly removing the file mode when sending messages on the wire. PiperOrigin-RevId: 249154033 Change-Id: Id6637130e567b03758130eb6c7cdbc976384b7d6
2019-05-20Fix incorrect tmpfs timestamp updatesMichael Pratt
* Creation of files, directories (and other fs objects) in a directory should always update ctime. * Same for removal. * atime should not be updated on lookup, only readdir. I've also renamed some misleading functions that update mtime and ctime. PiperOrigin-RevId: 249115063 Change-Id: I30fa275fa7db96d01aa759ed64628c18bb3a7dc7
2019-05-17Return EPERM for mknodMichael Pratt
This more directly matches what Linux does with unsupported nodes. PiperOrigin-RevId: 248780425 Change-Id: I17f3dd0b244f6dc4eb00e2e42344851b8367fbec
2019-05-17Fix gofer rename ctime and cleanup stat_times testMichael Pratt
There is a lot of redundancy that we can simplify in the stat_times test. This will make it easier to add new tests. However, the simplification reveals that cached uattrs on goferfs don't properly update ctime on rename. PiperOrigin-RevId: 248773425 Change-Id: I52662728e1e9920981555881f9a85f9ce04041cf
2019-05-15gofer: don't call hostfile.Close if hostFile is nilAndrei Vagin
PiperOrigin-RevId: 248437159 Change-Id: Ife71f6ca032fca59ec97a82961000ed0af257101
2019-05-15Automated rollback of changelist 247964961Andrei Vagin
PiperOrigin-RevId: 248411456 Change-Id: I21c3767b0b7e5948536d4c0b78be46ba35cf76cb
2019-05-14Start of support for /proc/pid/cgroup file.Nicolas Lacasse
PiperOrigin-RevId: 248263378 Change-Id: Ic057d2bb0b6212110f43ac4df3f0ac9bf931ab98
2019-05-14Remove false commentMichael Pratt
PiperOrigin-RevId: 248249285 Change-Id: I9b6d267baa666798b22def590ff20c9a118efd47
2019-05-13gvisor/hostnet: restart epoll_wait after epoll_ctlAndrei Vagin
Otherwise changes of epoll_ctl will not have affect. PiperOrigin-RevId: 247964961 Change-Id: I9fbb35c44766421af45d9ed53760e0c324d80d99
2019-05-10Add pgalloc.DelayedEvictionManual.Jamie Liu
PiperOrigin-RevId: 247667272 Change-Id: I16b04e11bb93f50b7e05e888992303f730e4a877
2019-05-09Implement fallocate(2)Fabricio Voznika
Closes #225 PiperOrigin-RevId: 247508791 Change-Id: I04f47cf2770b30043e5a272aba4ba6e11d0476cc
2019-05-09Remove dhcp clientTamir Duberstein
This was upstreamed from Fuchsia, but it is pretty buggy and doesn't rely on any private APIs. Thus it can be checked into the Fuchsia source tree without forking netstack, where we can more easily iterate on (and eventually remove) it. PiperOrigin-RevId: 247506582 Change-Id: Ifb1b60c6c4941c374a59c5570a6a9cacf2468981
2019-05-08Set the FilesytemType in MountSource from the Filesystem.Nicolas Lacasse
And stop storing the Filesystem in the MountSource. This allows us to decouple the MountSource filesystem type from the name of the filesystem. PiperOrigin-RevId: 247292982 Change-Id: I49cbcce3c17883b7aa918ba76203dfd6d1b03cc8
2019-05-07Check GSO for nil in WritePacketGoogler
Testing: Unit tests added PiperOrigin-RevId: 247096269 Change-Id: I849c010eadcb53caf45896a15ef38162d66a9568
2019-05-07Add gonet.DialContextTCP.Ian Gudger
Allows cancellation and timeouts. PiperOrigin-RevId: 247090428 Change-Id: I91907f12e218677dcd0e0b6d72819deedbd9f20c
2019-05-07Remove defers from gofer.contextFileFabricio Voznika
Most are single line methods in hot paths. PiperOrigin-RevId: 247050267 Change-Id: I428d78723fe00b57483185899dc8fa9e1f01e2ea
2019-05-06Ensure all uses of MM.brk occur under MM.mappingMu in MM.Brk().Jamie Liu
PiperOrigin-RevId: 246921386 Change-Id: I71d8908858f45a9a33a0483470d0240eaf0fd012
2019-05-05Fix raw socket behavior and tests.Kevin Krakauer
Some behavior was broken due to the difficulty of running automated raw socket tests. Change-Id: I152ca53916bb24a0208f2dc1c4f5bc87f4724ff6 PiperOrigin-RevId: 246747067
2019-05-03Add arm64 support to pkg/seccompBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com> PiperOrigin-RevId: 246622505 Change-Id: I803639a0c5b0f75959c64fee5385314214834d10
2019-05-03Update tcpip Clock description.Ian Gudger
The tcpip.Clock comment stated that times provided by it should not be used for netstack internal timekeeping. This comment was from before the interface supported monotonic times. The monotonic times that it provides are now be the preferred time source for netstack internal timekeeping. PiperOrigin-RevId: 246618772 Change-Id: I853b720e3d719b03fabd6156d2431da05d354bda
2019-05-03gofer: don't leak file descriptorsAndrei Vagin
Fixes #219 PiperOrigin-RevId: 246568639 Change-Id: Ic7afd15dde922638d77f6429c508d1cbe2e4288a
2019-05-03Support IPv4 fragmentation in netstackGoogler
Testing: Unit tests and also large ping in Fuchsia OS PiperOrigin-RevId: 246563592 Change-Id: Ia12ab619f64f4be2c8d346ce81341a91724aef95
2019-05-03Add netfilter ABI for iptables support.Kevin Krakauer
Change-Id: Ifbd2abf63ea8062a89b83e948d3e9735480d8216 PiperOrigin-RevId: 246559904
2019-05-03Fix transport/raw copybara exportTamir Duberstein
- include packet_list.go - exclude state.go (by renaming to include an underscore) Also rename raw.go to endpoint.go for consistency. PiperOrigin-RevId: 246547912 Change-Id: I19c8331c794ba683a940cc96a8be6497b53ff24d
2019-05-03Implement support for SACK based recovery(RFC 6675).Bhasker Hariharan
PiperOrigin-RevId: 246536003 Change-Id: I118b745f45040be9c70cb6a1028acdb06c78d8c9
2019-05-03Proper cleanup of sockets that used REUSEPORTChris Kuiper
Fixed a small logic error that broke proper accounting of MultiPortEndpoints. PiperOrigin-RevId: 246502126 Change-Id: I1a7d6ea134f811612e545676212899a3707bc2c2
2019-05-02Support reception of multicast data on more than one socketChris Kuiper
This requires two changes: 1) Support for more than one socket to join a given multicast group. 2) Duplicate delivery of incoming multicast packets to all sockets listening for it. In addition, I tweaked the code (and added a test) to disallow duplicates IP_ADD_MEMBERSHIP calls for the same group and NIC. This is how Linux does it. PiperOrigin-RevId: 246437315 Change-Id: Icad8300b4a8c3f501d9b4cd283bd3beabef88b72
2019-04-30Update reference to old typeMichael Pratt
PiperOrigin-RevId: 246036806 Change-Id: I5554a43a1f8146c927402db3bf98488a2da0fbe7
2019-04-30Implement async MemoryFile eviction, and use it in CachingInodeOperations.Jamie Liu
This feature allows MemoryFile to delay eviction of "optional" allocations, such as unused cached file pages. Note that this incidentally makes CachingInodeOperations writeback asynchronous, in the sense that it doesn't occur until eviction; this is necessary because between when a cached page becomes evictable and when it's evicted, file writes (via CachingInodeOperations.Write) may dirty the page. As currently implemented, this feature won't meaningfully impact steady-state memory usage or caching; the reclaimer goroutine will schedule eviction as soon as it runs out of other work to do. Future CLs increase caching by adding constraints on when eviction is scheduled. PiperOrigin-RevId: 246014822 Change-Id: Ia85feb25a2de92a48359eb84434b6ec6f9bea2cb
2019-04-29Implement the MSG_CTRUNC msghdr flag for Unix sockets.Ian Gudger
Updates google/gvisor#206 PiperOrigin-RevId: 245880573 Change-Id: Ifa715e98d47f64b8a32b04ae9378d6cd6bd4025e
2019-04-29Reduce memory allocations on serving pathFabricio Voznika
Cache last used messages and reuse them for subsequent requests. If more messages are needed, they are created outside the cache on demand. PiperOrigin-RevId: 245836910 Change-Id: Icf099ddff95df420db8e09f5cdd41dcdce406c61
2019-04-29Change copyright notice to "The gVisor Authors"Michael Pratt
Based on the guidelines at https://opensource.google.com/docs/releasing/authors/. 1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./' 2. Manual fixup of "Google Inc" references. 3. Add AUTHORS file. Authors may request to be added to this file. 4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS. Fixes #209 PiperOrigin-RevId: 245823212 Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-29Allow and document bug ids in gVisor codebase.Nicolas Lacasse
PiperOrigin-RevId: 245818639 Change-Id: I03703ef0fb9b6675955637b9fe2776204c545789
2019-04-29createAt should return all errors from FindInode except ENOENT.Nicolas Lacasse
Previously, createAt was eating all errors from FindInode except for EACCES and proceeding with the creation. This is incorrect, as FindInode can return many other errors (like ENAMETOOLONG) that should stop creation. This CL changes createAt to return all errors encountered except for ENOENT, which we can ignore because we are about to create the thing. PiperOrigin-RevId: 245773222 Change-Id: I1b317021de70f0550fb865506f6d8147d4aebc56
2019-04-26tcpip/adapters/gonet: add CloseRead & CloseWrite methods to ConnBen Burkert
Add the CloseRead & CloseWrite methods that performs shutdown on the corresponding Read & Write sides of a connection. Change-Id: I3996a2abdc7cd68a2becba44dc4bd9f0919d2ce1 PiperOrigin-RevId: 245537950
2019-04-26Make raw sockets a toggleable feature disabled by default.Kevin Krakauer
PiperOrigin-RevId: 245511019 Change-Id: Ia9562a301b46458988a6a1f0bbd5f07cbfcb0615
2019-04-26kvm: remove non-sane sanity checkAdin Scannell
Apparently some platforms don't have pSize < vSize. Fixes #208 PiperOrigin-RevId: 245480998 Change-Id: I2a98229912f4ccbfcd8e79dfa355104f14275a9c
2019-04-26Bump the AF_PACKET socket rcv buf size to 4MB by default.Bhasker Hariharan
Packet socket receive buffers default to the sysctl value of net.core.rmem_default and are capped by net.core.rmem_max both which are usually set to 208KB on most systems. Since we can't expect every gVisor user to bump these we use SO_RCVBUFFORCE to exceed the limit. This is possible as runsc runs with CAP_NET_ADMIN outside the sandbox and can do this before the FD is passed to the sentry inside the sandbox. Updates #211 iperf output w/ 4MB buffer. iperf3 -c 172.17.0.2 -t 100 Connecting to host 172.17.0.2, port 5201 [ 4] local 172.17.0.1 port 40378 connected to 172.17.0.2 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 1.15 GBytes 9.89 Gbits/sec 0 1.02 MBytes [ 4] 1.00-2.00 sec 1.18 GBytes 10.2 Gbits/sec 0 1.02 MBytes [ 4] 2.00-3.00 sec 965 MBytes 8.09 Gbits/sec 0 1.02 MBytes [ 4] 3.00-4.00 sec 942 MBytes 7.90 Gbits/sec 0 1.02 MBytes [ 4] 4.00-5.00 sec 952 MBytes 7.99 Gbits/sec 0 1.02 MBytes [ 4] 5.00-6.00 sec 1.14 GBytes 9.81 Gbits/sec 0 1.02 MBytes [ 4] 6.00-7.00 sec 1.13 GBytes 9.68 Gbits/sec 0 1.02 MBytes [ 4] 7.00-8.00 sec 930 MBytes 7.80 Gbits/sec 0 1.02 MBytes [ 4] 8.00-9.00 sec 1.15 GBytes 9.91 Gbits/sec 0 1.02 MBytes [ 4] 9.00-10.00 sec 938 MBytes 7.87 Gbits/sec 0 1.02 MBytes [ 4] 10.00-11.00 sec 737 MBytes 6.18 Gbits/sec 0 1.02 MBytes [ 4] 11.00-12.00 sec 1.16 GBytes 9.93 Gbits/sec 0 1.02 MBytes [ 4] 12.00-13.00 sec 917 MBytes 7.69 Gbits/sec 0 1.02 MBytes [ 4] 13.00-14.00 sec 1.19 GBytes 10.2 Gbits/sec 0 1.02 MBytes [ 4] 14.00-15.00 sec 1.01 GBytes 8.70 Gbits/sec 0 1.02 MBytes [ 4] 15.00-16.00 sec 1.20 GBytes 10.3 Gbits/sec 0 1.02 MBytes [ 4] 16.00-17.00 sec 1.14 GBytes 9.80 Gbits/sec 0 1.02 MBytes ^C[ 4] 17.00-17.60 sec 718 MBytes 10.1 Gbits/sec 0 1.02 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-17.60 sec 18.4 GBytes 8.98 Gbits/sec 0 sender [ 4] 0.00-17.60 sec 0.00 Bytes 0.00 bits/sec receiver PiperOrigin-RevId: 245470590 Change-Id: I1c08c5ee8345de6ac070513656a4703312dc3c00
2019-04-26Fix reference counting bug in /proc/PID/fdinfo/.Kevin Krakauer
PiperOrigin-RevId: 245452217 Change-Id: I7164d8f57fe34c17e601079eb9410a6d95af1869
2019-04-25Perform explicit CPUID and FP state compatibility checks on restoreMichael Pratt
PiperOrigin-RevId: 245341004 Change-Id: Ic4d581039d034a8ae944b43e45e84eb2c3973657
2019-04-25Don't enforce NAME_MAX in fs.Dirent.walk().Jamie Liu
Maximum filename length is filesystem-dependent, and obtained via statfs::f_namelen. This limit is usually 255 bytes (NAME_MAX), but not always. For example, VFAT supports filenames of up to 255... UCS-2 characters, which Linux conservatively takes to mean UTF-8-encoded bytes: fs/fat/inode.c:fat_statfs(), FAT_LFN_LEN * NLS_MAX_CHARSET_SIZE. As a result, Linux's VFS does not enforce NAME_MAX: $ rg --maxdepth=1 '\WNAME_MAX\W' fs/ include/linux/ fs/libfs.c 38: buf->f_namelen = NAME_MAX; 64: if (dentry->d_name.len > NAME_MAX) include/linux/relay.h 74: char base_filename[NAME_MAX]; /* saved base filename */ include/linux/fscrypt.h 149: * filenames up to NAME_MAX bytes, since base64 encoding expands the length. include/linux/exportfs.h 176: * understanding that it is already pointing to a a %NAME_MAX+1 sized Remove this check from core VFS, and add it to ramfs (and by extension tmpfs), where it is actually applicable: mm/shmem.c:shmem_dir_inode_operations.lookup == simple_lookup *does* enforce NAME_MAX. PiperOrigin-RevId: 245324748 Change-Id: I17567c4324bfd60e31746a5270096e75db963fac
2019-04-23Fixes to PacketMMap dispatcher.Bhasker Hariharan
This CL fixes the following bugs: - Uses atomic to set/read status instead of binary.LittleEndian.PutUint32 etc which are not atomic. - Increments ringOffsets for frames that are truncated (i.e status is tpStatusCopy) - Does not ignore frames with tpStatusLost bit set as they are valid frames and only indicate that there some frames were lost before this one and metrics can be retrieved with a getsockopt call. - Adds checks to make sure blockSize is a multiple of page size. This is required as the kernel allocates in pages per block and rejects sizes that are not page aligned with an EINVAL. Updates #210 PiperOrigin-RevId: 244959464 Change-Id: I5d61337b7e4c0f8a3063dcfc07791d4c4521ba1f
2019-04-23Remove reflection from 9P serving pathFabricio Voznika
p9.messageByType was taking 7% of p9.recv before, spending time with reflection and map lookup. Now it's reduced to 1%. PiperOrigin-RevId: 244947313 Change-Id: I42813f920557b7656f8b29157eb32acd79e11fa5
2019-04-23Replace os.File with fd.FD in fsgoferFabricio Voznika
os.NewFile() accounts for 38% of CPU time in localFile.Walk(). This change switchs to use fd.FD which is much cheaper to create. Now, fd.New() in localFile.Walk() accounts for only 4%. PiperOrigin-RevId: 244944983 Change-Id: Ic892df96cf2633e78ad379227a213cb93ee0ca46
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