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2019-05-14Update out of date commentMichael Pratt
PiperOrigin-RevId: 248265524 Change-Id: Ib9082f08d24ba10535079cf89c714fb22a4fdf10
2019-05-10Modernize mknod testMichael Pratt
PiperOrigin-RevId: 247704588 Change-Id: I1e63e2b310145695fbe38429b91e44d72473fcd6
2019-05-09Implement fallocate(2)Fabricio Voznika
Closes #225 PiperOrigin-RevId: 247508791 Change-Id: I04f47cf2770b30043e5a272aba4ba6e11d0476cc
2019-05-08Fix types that are subtly incorrect.Googler
PiperOrigin-RevId: 247294093 Change-Id: Iac8c76e50bbc15c240ae7da7f5786f9968e7057c
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
2019-05-03gvisor: run bazel in a docker containerAndrei Vagin
bazel has a lot of dependencies and users don't want to install them just to build gvisor. These changes allows to run bazel in a docker container. A bazel cache is on the local file system (~/.cache/bazel), so incremental builds should be fast event after recreating a bazel container. Here is an example how to build runsc: make BAZEL_OPTIONS="build runsc:runsc" bazel Change-Id: I8c0a6d0c30e835892377fb6dd5f4af7a0052d12a PiperOrigin-RevId: 246570877
2019-05-03Skip flaky ClockGettime.CputimeId take 2Fabricio Voznika
The test also times out when GCE machine has 2 CPUs. I cannot repro it locally with a 2 CPU cgroup though. Let's skip the test when there are 2 CPUs to stop the flakiness and retest it once the fix is available. PiperOrigin-RevId: 246523363 Change-Id: I9d9d922a5be3aa7bc91dff5a1807ca99f3f4a4f9
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
2019-05-02Replace dynamic macros with constants in memfd test.Kevin Krakauer
PiperOrigin-RevId: 246433167 Change-Id: Idb9b6c20ee1da193176288dfd2f9d85ec0e69c54
2019-04-29Implement the MSG_CTRUNC msghdr flag for Unix sockets.Ian Gudger
Updates google/gvisor#206 PiperOrigin-RevId: 245880573 Change-Id: Ifa715e98d47f64b8a32b04ae9378d6cd6bd4025e
2019-04-29Skip flaky ClockGettime.CputimeIdFabricio Voznika
Test times out when it runs on a single core. Skip until the bug in the Go runtime is fixed. PiperOrigin-RevId: 245866466 Change-Id: Ic3e72131c27136d58b71f6b11acc78abf55895d4
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
2019-04-29Appease googletest deprecationTamir Duberstein
PiperOrigin-RevId: 245788366 Change-Id: I17bbecf8493132dbe95564c34c45b838194bfabb
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
2019-04-26Remove syscall tests' dependency on glogTamir Duberstein
PiperOrigin-RevId: 245469859 Change-Id: I0610e477cc3a884275852e83028ecfb501f2c039
2019-04-26Fix reference counting bug in /proc/PID/fdinfo/.Kevin Krakauer
PiperOrigin-RevId: 245452217 Change-Id: I7164d8f57fe34c17e601079eb9410a6d95af1869
2019-04-26Change name of sticky test arg.Kevin Krakauer
PiperOrigin-RevId: 245451875 Change-Id: Icee2c4ed74564e77454c60d60f456454443ccadf
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
2019-04-25s,sys/poll.h/,poll.h,gTamir Duberstein
See https://git.musl-libc.org/cgit/musl/tree/include/sys/poll.h PiperOrigin-RevId: 245312375 Change-Id: If749ae3f94ccedc82eb6b594b32155924a354b58
2019-04-25Handle glibc and XSI variants of strerror_rTamir Duberstein
PiperOrigin-RevId: 245306581 Change-Id: I44a034310809f8e9e651be8023ff1985561602fc
2019-04-25Remove useless modifiersTamir Duberstein
PiperOrigin-RevId: 245304611 Change-Id: Ie0e9bfc03d064e41d50157eeb4df22b2635f41e2
2019-04-24Add Unix socket tests for the MSG_CTRUNC msghdr flag.Ian Gudger
TCP tests and the implementation will come in followup CLs. Updates google/gvisor#206 Updates google/gvisor#207 PiperOrigin-RevId: 245121470 Change-Id: Ib50b62724d3ba0cbfb1374e1f908798431ee2b21
2019-04-22Bugfix: fix fstatat symbol link to dirWei Zhang
For a symbol link to some directory, eg. `/tmp/symlink -> /tmp/dir` `fstatat("/tmp/symlink")` should return symbol link data, but `fstatat("/tmp/symlink/")` (symlink with trailing slash) should return directory data it points following linux behaviour. Currently fstatat() a symlink with trailing slash will get "not a directory" error which is wrong. Signed-off-by: Wei Zhang <zhangwei198900@gmail.com> Change-Id: I63469b1fb89d083d1c1255d32d52864606fbd7e2 PiperOrigin-RevId: 244783916
2019-04-19tcpip/transport/tcp: read side only shutdown of an endpointBen Burkert
Support shutdown on only the read side of an endpoint. Reads performed after a call to Shutdown with only the ShutdownRead flag will return ErrClosedForReceive without data. Break out the shutdown(2) with SHUT_RD syscall test into to two tests. The first tests that no packets are sent when shutting down the read side of a socket. The second tests that, after shutting down the read side of a socket, unread data can still be read, or an EOF if there is no more data to read. Change-Id: I9d7c0a06937909cbb466b7591544a4bcaebb11ce PiperOrigin-RevId: 244459430
2019-04-19Add support for the MSG_TRUNC msghdr flag.Ian Gudger
The MSG_TRUNC flag is set in the msghdr when a message is truncated. Fixes google/gvisor#200 PiperOrigin-RevId: 244440486 Change-Id: I03c7d5e7f5935c0c6b8d69b012db1780ac5b8456
2019-04-18Keep symlink target open while in test that compares inode ids.Nicolas Lacasse
Inode ids are only guaranteed to be stable across save/restore if the file is held open. This CL fixes a simple stat test to allow it to compare symlink and target by inode id, as long as the link target is held open. PiperOrigin-RevId: 244238343 Change-Id: I74c5115915b1cc032a4c16515a056a480f218f00
2019-04-17Don't allow sigtimedwait to catch unblockable signalsMichael Pratt
The existing logic attempting to do this is incorrect. Unary ^ has higher precedence than &^, so mask always has UnblockableSignals cleared, allowing dequeueSignalLocked to dequeue unblockable signals (which allows userspace to ignore them). Switch the logic so that unblockable signals are always masked. PiperOrigin-RevId: 244058487 Change-Id: Ib19630ac04068a1fbfb9dc4a8eab1ccbdb21edc3
2019-04-17Use FD limit and file size limit from hostFabricio Voznika
FD limit and file size limit is read from the host, instead of using hard-coded defaults, given that they effect the sandbox process. Also limit the direct cache to use no more than half if the available FDs. PiperOrigin-RevId: 244050323 Change-Id: I787ad0fdf07c49d589e51aebfeae477324fe26e6
2019-04-11CONTRIBUTING: add style guide pointerAdin Scannell
Change-Id: I93a78a6b2bb2eaa69046c6cfecee2e4cfcf20e44 PiperOrigin-RevId: 243140359
2019-04-10Internal changeMichael Pratt
PiperOrigin-RevId: 242978508 Change-Id: I0ea59ac5ba1dd499e87c53f2e24709371048679b
2019-04-10rlimits test: don't exceed nr_open.Kevin Krakauer
Even superuser cannot raise RLIMIT_NOFILE above /proc/sys/fs/nr_open, so start the test by lowering the limits before raising. Change-Id: Ied6021c64178a6cb9098088a1a3384db523a226f PiperOrigin-RevId: 242965249
2019-04-10Allow threads with CAP_SYS_RESOURCE to raise hard rlimits.Kevin Krakauer
PiperOrigin-RevId: 242919489 Change-Id: Ie3267b3bcd8a54b54bc16a6556369a19e843376f
2019-04-10Fixed /proc/cpuinfo permissionsShiva Prasanth
This also applies these permissions to other static proc files. Change-Id: I4167e585fed49ad271aa4e1f1260babb3239a73d PiperOrigin-RevId: 242898575
2019-04-09Match multi-word StateMichael Pratt
From a recent test failure: "State:\tD (disk sleep)\n" "disk sleep" does not match \w+. We need to allow spaces. PiperOrigin-RevId: 242762469 Change-Id: Ic8d05a16669412a72c1e76b498373e5b22fe64c4
2019-04-08Internal changeMichael Pratt
PiperOrigin-RevId: 242573252 Change-Id: Ibb4c6bfae2c2e322bf1cec23181a0ab663d8530a
2019-04-08Export kernel.SignalInfoPriv.Jamie Liu
Also add kernel.SignalInfoNoInfo, and use it in RLIMIT_FSIZE checks. PiperOrigin-RevId: 242562428 Change-Id: I4887c0e1c8f5fddcabfe6d4281bf76d2f2eafe90
2019-04-08Add TODOMichael Pratt
PiperOrigin-RevId: 242531141 Change-Id: I2a3bd815bda09f392f511f47120d5d9e6e86a40d
2019-04-05Deflake PtraceTest.SeizeSetOptions.Jamie Liu
PiperOrigin-RevId: 242226319 Change-Id: Iefc78656841315f6b7d48bd85db451486850264d
2019-04-04gvisor: Add support for the MS_NOEXEC mount optionAndrei Vagin
https://github.com/google/gvisor/issues/145 PiperOrigin-RevId: 242044115 Change-Id: I8f140fe05e32ecd438b6be218e224e4b7fe05878
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
2019-04-02Set options on the correct Task in PTRACE_SEIZE.Jamie Liu
$ docker run --rm --runtime=runsc -it --cap-add=SYS_PTRACE debian bash -c "apt-get update && apt-get install strace && strace ls" ... Setting up strace (4.15-2) ... execve("/bin/ls", ["ls"], [/* 6 vars */]) = 0 brk(NULL) = 0x5646d8c1e000 uname({sysname="Linux", nodename="114ef93d2db3", ...}) = 0 ... PiperOrigin-RevId: 241643321 Change-Id: Ie4bce27a7fb147eef07bbae5895c6ef3f529e177
2019-04-02Add build rule for raw socket tests so they are runnable via:Kevin Krakauer
bazel test test/syscalls:raw_socket_ipv4_test_{native,runsc_ptrace,runsc_kvm} PiperOrigin-RevId: 241640049 Change-Id: Iac4dbdd7fd1827399a472059ac7d85fb6b506577
2019-04-02Add test that symlinking over a directory returns EEXIST.Nicolas Lacasse
Also remove comments in InodeOperations that required that implementation of some Create* operations ensure that the name does not already exist, since these checks are all centralized in the Dirent. PiperOrigin-RevId: 241637335 Change-Id: Id098dc6063ff7c38347af29d1369075ad1e89a58
2019-04-02Add a raw socket transport endpoint and use it for raw ICMP sockets.Kevin Krakauer
Having raw socket code together will make it easier to add support for other raw network protocols. Currently, only ICMP uses the raw endpoint. However, adding support for other protocols such as UDP shouldn't be much more difficult than adding a few switch cases. PiperOrigin-RevId: 241564875 Change-Id: I77e03adafe4ce0fd29ba2d5dfdc547d2ae8f25bf
2019-04-01Save/restore simple devices.Rahat Mahmood
We weren't saving simple devices' last allocated inode numbers, which caused inode number reuse across S/R. PiperOrigin-RevId: 241414245 Change-Id: I964289978841ef0a57d2fa48daf8eab7633c1284
2019-04-01Trim trailing newline when reading /proc/[pid]/{uid,gid}_map in test.Jamie Liu
This reveals a bug in the tests that require CAP_SET{UID,GID}: After the child process enters the new user namespace, it ceases to have the relevant capability in the parent user namespace, so the privileged write must be done by the parent process. Change tests accordingly. PiperOrigin-RevId: 241412765 Change-Id: I587c1f24aa6f2180fb2e5e5c0162691ba5bac1bc
2019-04-01Fix MemfdTest_OtherProcessCanOpenFromProcfs.Jamie Liu
- Make the body of InForkedProcess async-signal-safe. - Pass the correct path to open(). PiperOrigin-RevId: 241348774 Change-Id: I753dfa36e4fb05521e659c173e3b7db0c7fc159b
2019-03-29Return srclen in proc.idMapFileOperations.Write.Jamie Liu
PiperOrigin-RevId: 241037926 Change-Id: I4b0381ac1c7575e8b861291b068d3da22bc03850
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