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2019-07-12Merge 69e0affa (automated)gVisor bot
2019-07-09Cleanup straggling syscall dependencies.Adin Scannell
PiperOrigin-RevId: 257293198
2019-06-28Drop ashmem and binder.Adin Scannell
These are unfortunately unused and unmaintained. They can be brought back in the future if need requires it. PiperOrigin-RevId: 255697132
2019-06-27Merge 5b41ba5d (automated)gVisor bot
2019-06-27Fix various spelling issues in the documentationMichael Pratt
Addresses obvious typos, in the documentation only. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/443 from Pixep:fix/documentation-spelling 4d0688164eafaf0b3010e5f4824b35d1e7176d65 PiperOrigin-RevId: 255477779
2019-06-22Merge 35719d52 (automated)gVisor bot
2019-06-22Implement statx.Nicolas Lacasse
We don't have the plumbing for btime yet, so that field is left off. The returned mask indicates that btime is absent. Fixes #343 PiperOrigin-RevId: 254575752
2019-06-21Merge 054b5632 (automated)gVisor bot
2019-06-21Update commentFabricio Voznika
PiperOrigin-RevId: 254428866
2019-06-13Merge add40fd6 (automated)gVisor bot
2019-06-13Update canonical repository.Adin Scannell
This can be merged after: https://github.com/google/gvisor-website/pull/77 or https://github.com/google/gvisor-website/pull/78 PiperOrigin-RevId: 253132620
2019-06-11Merge 74e397e3 (automated)gVisor bot
2019-06-10Add introspection for Linux/AMD64 syscallsIan Lewis
Adds simple introspection for syscall compatibility information to Linux/AMD64. Syscalls registered in the syscall table now have associated metadata like name, support level, notes, and URLs to relevant issues. Syscall information can be exported as a table, JSON, or CSV using the new 'runsc help syscalls' command. Users can use this info to debug and get info on the compatibility of the version of runsc they are running or to generate documentation. PiperOrigin-RevId: 252558304
2019-06-10Merge a00157cc (automated)gVisor bot
2019-06-06Use common definition of SockType.Rahat Mahmood
SockType isn't specific to unix domain sockets, and the current definition basically mirrors the linux ABI's definition. PiperOrigin-RevId: 251956740
2019-06-06"Implement" mbind(2).Jamie Liu
We still only advertise a single NUMA node, and ignore mempolicy accordingly, but mbind() at least now succeeds and has effects reflected by get_mempolicy(). Also fix handling of nodemasks: round sizes to unsigned long (as documented and done by Linux), and zero trailing bits when copying them out. PiperOrigin-RevId: 251950859
2019-06-06Track and export socket state.Rahat Mahmood
This is necessary for implementing network diagnostic interfaces like /proc/net/{tcp,udp,unix} and sock_diag(7). For pass-through endpoints such as hostinet, we obtain the socket state from the backend. For netstack, we add explicit tracking of TCP states. PiperOrigin-RevId: 251934850
2019-06-05Implement dumpability tracking and checksMichael Pratt
We don't actually support core dumps, but some applications want to get/set dumpability, which still has an effect in procfs. Lack of support for set-uid binaries or fs creds simplifies things a bit. As-is, processes started via CreateProcess (i.e., init and sentryctl exec) have normal dumpability. I'm a bit torn on whether sentryctl exec tasks should be dumpable, but at least since they have no parent normal UID/GID checks should protect them. PiperOrigin-RevId: 251712714
2019-06-02Merge 216da0b7 (automated)gVisor bot
2019-05-24Wrap comments and reword in common present tenseMichael Pratt
PiperOrigin-RevId: 249888234 Change-Id: Icfef32c3ed34809c34100c07e93e9581c786776e
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
2019-05-21Add 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
2019-05-09Implement fallocate(2)Fabricio Voznika
Closes #225 PiperOrigin-RevId: 247508791 Change-Id: I04f47cf2770b30043e5a272aba4ba6e11d0476cc
2019-05-03Add netfilter ABI for iptables support.Kevin Krakauer
Change-Id: Ifbd2abf63ea8062a89b83e948d3e9735480d8216 PiperOrigin-RevId: 246559904
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
2019-04-18Only emit unimplemented syscall events for unsupported values.Ian Gudger
Only emit unimplemented syscall events for setting SO_OOBINLINE and SO_LINGER when attempting to set unsupported values. PiperOrigin-RevId: 244229675 Change-Id: Icc4562af8f733dd75a90404621711f01a32a9fc1
2019-04-03Fix index out of bounds in tty implementation.Kevin Krakauer
The previous implementation revolved around runes instead of bytes, which caused weird behavior when converting between the two. For example, peekRune would read the byte 0xff from a buffer, convert it to a rune, then return it. As rune is an alias of int32, 0xff was 0-padded to int32(255), which is the hex code point for ?. However, peekRune also returned the length of the byte (1). When calling utf8.EncodeRune, we only allocated 1 byte, but tried the write the 2-byte character ?. tl;dr: I apparently didn't understand runes when I wrote this. PiperOrigin-RevId: 241789081 Change-Id: I14c788af4d9754973137801500ef6af7ab8a8727
2019-03-26Implement memfd_create.Rahat Mahmood
Memfds are simply anonymous tmpfs files with no associated mounts. Also implementing file seals, which Linux only implements for memfds at the moment. PiperOrigin-RevId: 240450031 Change-Id: I31de78b950101ae8d7a13d0e93fe52d98ea06f2f
2019-03-05Priority-inheritance futex implementationFabricio Voznika
It is Implemented without the priority inheritance part given that gVisor defers scheduling decisions to Go runtime and doesn't have control over it. PiperOrigin-RevId: 236989545 Change-Id: I714c8ca0798743ecf3167b14ffeb5cd834302560
2019-03-01Add semctl(GETPID) syscallFabricio Voznika
Also added unimplemented notification for semctl(2) commands. PiperOrigin-RevId: 236340672 Change-Id: I0795e3bd2e6d41d7936fabb731884df426a42478
2019-02-08Encode stat to bytes manually, instead of calling CopyObjectOut.Nicolas Lacasse
CopyObjectOut grows its destination byte slice incrementally, causing many small slice allocations on the heap. This leads to increased GC and noticeably slower stat calls. PiperOrigin-RevId: 233140904 Change-Id: Ieb90295dd8dd45b3e56506fef9d7f86c92e97d97
2019-02-07Plumb IP_ADD_MEMBERSHIP and IP_DROP_MEMBERSHIP to netstack.Ian Gudger
Also includes a few fixes for IPv4 multicast support. IPv6 support is coming in a followup CL. PiperOrigin-RevId: 233008638 Change-Id: If7dae6222fef43fda48033f0292af77832d95e82
2019-02-07Implement /proc/net/unix.Rahat Mahmood
PiperOrigin-RevId: 232948478 Change-Id: Ib830121e5e79afaf5d38d17aeef5a1ef97913d23
2019-01-31Remove license commentsMichael Pratt
Nothing reads them and they can simply get stale. Generated with: $ sed -i "s/licenses(\(.*\)).*/licenses(\1)/" **/BUILD PiperOrigin-RevId: 231818945 Change-Id: Ibc3f9838546b7e94f13f217060d31f4ada9d4bf0
2019-01-14Remove fs.Handle, ramfs.Entry, and all the DeprecatedFileOperations.Nicolas Lacasse
More helper structs have been added to the fsutil package to make it easier to implement fs.InodeOperations and fs.FileOperations. PiperOrigin-RevId: 229305982 Change-Id: Ib6f8d3862f4216745116857913dbfa351530223b
2019-01-03Rename linux.Errno.Error to linux.Errno.String.Ian Gudger
Using linux.Errno as an error doesn't work very well as none of the sentry code expects error to contain a linux.Errno. This moves using syserr.Error.ToLinux as an error in a syscall handler from a runtime error to a compile error. PiperOrigin-RevId: 227744312 Change-Id: Iea63108a5b198296c908614e09c01733dd684da0
2018-12-21Implement SO_KEEPALIVE, TCP_KEEPIDLE, and TCP_KEEPINTVL.Ian Gudger
Within gVisor, plumb new socket options to netstack. Within netstack, fix GetSockOpt and SetSockOpt return value logic. PiperOrigin-RevId: 226532229 Change-Id: If40734e119eed633335f40b4c26facbebc791c74
2018-12-21Automated rollback of changelist 226224230Jamie Liu
PiperOrigin-RevId: 226493053 Change-Id: Ia98d1cb6dd0682049e4d907ef69619831de5c34a
2018-12-19Automated rollback of changelist 225861605Googler
PiperOrigin-RevId: 226224230 Change-Id: Id24c7d3733722fd41d5fe74ef64e0ce8c68f0b12
2018-12-19Implement pwritev2.Zach Koopmans
Implement pwritev2 and associated unit tests. Clean up preadv2 unit tests. Tag RWF_ flags in both preadv2 and pwritev2 with associated bug tickets. PiperOrigin-RevId: 226222119 Change-Id: Ieb22672418812894ba114bbc88e67f1dd50de620
2018-12-18Add BPFAction type with StringerFabricio Voznika
PiperOrigin-RevId: 226018694 Change-Id: I98965e26fe565f37e98e5df5f997363ab273c91b
2018-12-17Implement mlock(), kind of.Jamie Liu
Currently mlock() and friends do nothing whatsoever. However, mlocking is directly application-visible in a number of ways; for example, madvise(MADV_DONTNEED) and msync(MS_INVALIDATE) both fail on mlocked regions. We handle this inconsistently: MADV_DONTNEED is too important to not work, but MS_INVALIDATE is rejected. Change MM to track mlocked regions in a manner consistent with Linux. It still will not actually pin pages into host physical memory, but: - mlock() will now cause sentry memory management to precommit mlocked pages. - MADV_DONTNEED and MS_INVALIDATE will interact with mlocked pages as described above. PiperOrigin-RevId: 225861605 Change-Id: Iee187204979ac9a4d15d0e037c152c0902c8d0ee
2018-12-07Format sigaction in straceMichael Pratt
Sample: I1206 14:24:56.768520 3700 x:0] [ 1] ioctl_test E rt_sigaction(SIGSEGV, 0x7ee6edb0c590 {Handler: 0x559c6d915cf0, Flags: SA_SIGINFO|SA_RESTORER|SA_ONSTACK|SA_NODEFER, Restorer: 0x2a9901a259a0, Mask: []}, 0x7ee6edb0c630) I1206 14:24:56.768530 3700 x:0] [ 1] ioctl_test X rt_sigaction(SIGSEGV, 0x7ee6edb0c590 {Handler: 0x559c6d915cf0, Flags: SA_SIGINFO|SA_RESTORER|SA_ONSTACK|SA_NODEFER, Restorer: 0x2a9901a259a0, Mask: []}, 0x7ee6edb0c630 {Handler: SIG_DFL, Flags: 0x0, Restorer: 0x0, Mask: []}) = 0x0 (2.701?s) PiperOrigin-RevId: 224596606 Change-Id: I3512493aed99d3d75600249263da46686b1dc0e7
2018-12-06Convert ValueSet to a mapMichael Pratt
Unlike FlagSet, order doesn't matter here, so it can simply be a map. PiperOrigin-RevId: 224377910 Change-Id: I15810c698a7f02d8614bf09b59583ab73cba0514
2018-12-04Add ARM64 support to pkg/abi/linuxBin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com> Change-Id: I73cc4c406fadccb054e8e83c9464f6bef6280b0f PiperOrigin-RevId: 224025309
2018-11-26Implementation of preadv2 for Linux 4.4 supportZach Koopmans
Implement RWF_HIPRI (4.6) silently passes the read call. Implement -1 offset calls readv. PiperOrigin-RevId: 222840324 Change-Id: If9ddc1e8d086e1a632bdf5e00bae08205f95b6b0
2018-11-20Use RET_KILL_PROCESS if available in kernelFabricio Voznika
RET_KILL_THREAD doesn't work well for Go because it will kill only the offending thread and leave the process hanging. RET_TRAP can be masked out and it's not guaranteed to kill the process. RET_KILL_PROCESS is available since 4.14. For older kernel, continue to use RET_TRAP as this is the best option (likely to kill process, easy to debug). PiperOrigin-RevId: 222357867 Change-Id: Icc1d7d731274b16c2125b7a1ba4f7883fbdb2cbd
2018-11-20Add unsupported syscall events for get/setsockoptFabricio Voznika
PiperOrigin-RevId: 222148953 Change-Id: I21500a9f08939c45314a6414e0824490a973e5aa
2018-11-08Implement sync_file_range()Andrei Vagin
sync_file_range - sync a file segment with disk In Linux, sync_file_range() accepts three flags: SYNC_FILE_RANGE_WAIT_BEFORE Wait upon write-out of all pages in the specified range that have already been submitted to the device driver for write-out before performing any write. SYNC_FILE_RANGE_WRITE Initiate write-out of all dirty pages in the specified range which are not presently submitted write-out. Note that even this may block if you attempt to write more than request queue size. SYNC_FILE_RANGE_WAIT_AFTER Wait upon write-out of all pages in the range after performing any write. In this implementation: SYNC_FILE_RANGE_WAIT_BEFORE without SYNC_FILE_RANGE_WAIT_AFTER isn't supported right now. SYNC_FILE_RANGE_WRITE is skipped. It should initiate write-out of all dirty pages, but it doesn't wait, so it should be safe to do nothing while nobody uses SYNC_FILE_RANGE_WAIT_BEFORE. SYNC_FILE_RANGE_WAIT_AFTER is equal to fdatasync(). In Linux, sync_file_range() doesn't writes out the file's meta-data, but fdatasync() does if a file size is changed. PiperOrigin-RevId: 220730840 Change-Id: Iae5dfb23c2c916967d67cf1a1ad32f25eb3f6286
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