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2020-08-13[vfs2][gofer] Fix file creation flags sent to gofer.Ayush Ranjan
Fixes php runtime test ext/standard/tests/file/readfile_basic.phpt Fixes #3516 fsgofers only want the access mode in the OpenFlags passed to Create(). If more flags are supplied (like O_APPEND in this case), read/write from that fd will fail with EBADF. See runsc/fsgofer/fsgofer.go:WriteAt() VFS2 was providing more than just access modes. So filtering the flags using p9.OpenFlagsModeMask == linux.O_ACCMODE fixes the issue. Gofer in VFS1 also only extracts the access mode flags while making the create RPC. See pkg/sentry/fs/gofer/path.go:Create() Even in VFS2, when we open a handle, we extract out only the access mode flags + O_TRUNC. See third_party/gvisor/pkg/sentry/fsimpl/gofer/handle.go:openHandle() Added a test for this. PiperOrigin-RevId: 326574829
2020-08-13Ensure TCP TIME-WAIT is not terminated prematurely.Bhasker Hariharan
Netstack's TIME-WAIT state for a TCP socket could be terminated prematurely if the socket entered TIME-WAIT using shutdown(..., SHUT_RDWR) and then was closed using close(). This fixes that bug and updates the tests to verify that Netstack correctly honors TIME-WAIT under such conditions. Fixes #3106 PiperOrigin-RevId: 326456443
2020-08-12[vfs2][gofer] Return appropriate errors when opening and creating files.Ayush Ranjan
Fixes php test ext/standard/tests/file/touch_variation5.phpt on vfs2. Updates #3516 Also spotted a bug with O_EXCL, where we did not return EEXIST when we tried to open the root of the filesystem with O_EXCL | O_CREAT. Added some more tests for open() corner cases. PiperOrigin-RevId: 326346863
2020-08-10Populate IPPacketInfo with destination addressGhanan Gowripalan
IPPacketInfo.DestinationAddr should hold the destination of the IP packet, not the source. This change fixes that bug. PiperOrigin-RevId: 325910766
2020-08-07tcp: change the limit of TCP_LINGER2Andrei Vagin
It was changed in the Linux kernel: commit f0628c524fd188c3f9418e12478dfdfadacba815 Date: Fri Apr 24 16:06:16 2020 +0800 net: Replace the limit of TCP_LINGER2 with TCP_FIN_TIMEOUT_MAX PiperOrigin-RevId: 325493859
2020-08-07Tolerate EINTR from fallocate() in inotify test.Jamie Liu
PiperOrigin-RevId: 325472312
2020-08-05Add loss recovery option for TCP.Nayana Bidari
/proc/sys/net/ipv4/tcp_recovery is used to enable RACK loss recovery in TCP. PiperOrigin-RevId: 325157807
2020-08-03Add inotify events for fallocate and tests for fallocate/sendfile.Dean Deng
Updates #1479, #2923. PiperOrigin-RevId: 324658826
2020-08-03Merge pull request #3469 from craig08:fuse-fix-test-mount-failedgVisor bot
PiperOrigin-RevId: 324657612
2020-07-31Fix MountFuseFilesystem tests failingCraig Chi
Before kernel version 4.16-rc6, fuse mount is protected by capable(CAP_SYS_ADMIN). After this version, it uses ns_capable(CAP_SYS_ADMIN) to protect. Before the 4.16 kernel, it was not allowed to mount fuse file systems without the global CAP_SYS_ADMIN. Fixes #3360
2020-07-31test/socket_netlink_route: check that there is a route on local or main tablesAndrei Vagin
A new network namespace has only the local route table. PiperOrigin-RevId: 324303629
2020-07-31s/github.dev/gvisor.devKevin Krakauer
PiperOrigin-RevId: 324249991
2020-07-30Fix SETOWN_EX return value.Dean Deng
Return on success should be 0, not size of the struct copied out. PiperOrigin-RevId: 324029193
2020-07-30Disable consistently failing test.Adin Scannell
PiperOrigin-RevId: 324017310
2020-07-29Force registration for EPOLLHUP, not EPOLLRDHUP, in vfs2's epoll.Jamie Liu
Compare Linux's fs/eventpoll.c:do_epoll_ctl(). I don't know where EPOLLRDHUP came from. PiperOrigin-RevId: 323874419
2020-07-28Redirect TODO to GitHub issuesFabricio Voznika
PiperOrigin-RevId: 323715260
2020-07-27Fix when FUSE tests need to be skipped due to sentry configuration.Rahat Mahmood
PiperOrigin-RevId: 323426851
2020-07-23Implement get/set_robust_list.Nicolas Lacasse
PiperOrigin-RevId: 322904430
2020-07-23Merge pull request #3024 from ridwanmsharif:ridwanmsharif/fuse-stub-implgVisor bot
PiperOrigin-RevId: 322890087
2020-07-23Added stub FUSE filesystemRidwan Sharif
Allow FUSE filesystems to be mounted using libfuse. The appropriate flags and mount options are parsed and understood by fusefs.
2020-07-23Internal change.gVisor bot
PiperOrigin-RevId: 322859907
2020-07-23Fix wildcard bind for raw socket.Bhasker Hariharan
Fixes #3334 PiperOrigin-RevId: 322846384
2020-07-22Add O_APPEND support in vfs2 gofer.Ayush Ranjan
Helps in fixing open syscall tests: AppendConcurrentWrite and AppendOnly. We also now update the file size for seekable special files (regular files) which we were not doing earlier. Updates #2923 PiperOrigin-RevId: 322670843
2020-07-22Support for receiving outbound packets in AF_PACKET.Bhasker Hariharan
Updates #173 PiperOrigin-RevId: 322665518
2020-07-22Skip RawHDRINCL tests that are blocking presubmits/releases.Dean Deng
Temporarily skip these, on bhaskherh@'s advice. PiperOrigin-RevId: 322664955
2020-07-16Add support to return protocol in recvmsg for AF_PACKET.Bhasker Hariharan
Updates #173 PiperOrigin-RevId: 321690756
2020-07-15Add support for SO_ERROR to packet sockets.Bhasker Hariharan
Packet sockets also seem to allow double binding and do not return an error on linux. This was tested by running the syscall test in a linux namespace as root and the current test DoubleBind fails@HEAD. Passes after this change. Updates #173 PiperOrigin-RevId: 321445137
2020-07-15Fix minor bugs in a couple of interface IOCTLs.Bhasker Hariharan
gVisor incorrectly returns the wrong ARP type for SIOGIFHWADDR. This breaks tcpdump as it tries to interpret the packets incorrectly. Similarly, SIOCETHTOOL is used by tcpdump to query interface properties which fails with an EINVAL since we don't implement it. For now change it to return EOPNOTSUPP to indicate that we don't support the query rather than return EINVAL. NOTE: ARPHRD types for link endpoints are distinct from NIC capabilities and NIC flags. In Linux all 3 exist eg. ARPHRD types are stored in dev->type field while NIC capabilities are more like the device features which can be queried using SIOCETHTOOL but not modified and NIC Flags are fields that can be modified from user space. eg. NIC status (UP/DOWN/MULTICAST/BROADCAST) etc. Updates #2746 PiperOrigin-RevId: 321436525
2020-07-15Merge pull request #3165 from ridwanmsharif:ridwanmsharif/fuse-off-by-defaultgVisor bot
PiperOrigin-RevId: 321411758
2020-07-11Stub out SO_DETACH_FILTER.Bhasker Hariharan
Updates #2746 PiperOrigin-RevId: 320757963
2020-07-09Add support for IP_HDRINCL IP option for raw sockets.Bhasker Hariharan
Updates #2746 Fixes #3158 PiperOrigin-RevId: 320497190
2020-07-09Gate FUSE behind a runsc flagRidwan Sharif
This change gates all FUSE commands (by gating /dev/fuse) behind a runsc flag. In order to use FUSE commands, use the --fuse flag with the --vfs2 flag. Check if FUSE is enabled by running dmesg in the sandbox.
2020-07-07Deflake exec test.Jamie Liu
- Only use MAXSYMLINKS/2+1 symlinks for each of the interpreter and script paths in SymlinkLimitRefreshedForInterpreter to tolerate cases where the original paths (/tmp, /bin, or /bin/echo) themselves contain symlinks. - Ensure that UnshareFiles performs execve immediately after clone(CLONE_VFORK) (no heap allocation for ExecveArray/RunfilesPath). - Use lstat() rather than stat() for the existence check in fs_util's Exists; the latter will fail if the symlink target does not exist, even if the symlink does. PiperOrigin-RevId: 320110156
2020-07-07Set IPv4 ID on all non-atomic datagramsTony Gong
RFC 6864 imposes various restrictions on the uniqueness of the IPv4 Identification field for non-atomic datagrams, defined as an IP datagram that either can be fragmented (DF=0) or is already a fragment (MF=1 or positive fragment offset). In order to be compliant, the ID field is assigned for all non-atomic datagrams. Add a TCP unit test that induces retransmissions and checks that the IPv4 ID field is unique every time. Add basic handling of the IP_MTU_DISCOVER socket option so that the option can be used to disable PMTU discovery, effectively setting DF=0. Attempting to set the sockopt to anything other than disabled will fail because PMTU discovery is currently not implemented, and the default behavior matches that of disabled. PiperOrigin-RevId: 320081842
2020-07-07Fix mknod and inotify syscall testAyush Ranjan
This change fixes a few things: - creating sockets using mknod(2) is supported via vfs2 - fsgofer can create regular files via mknod(2) - mode = 0 for mknod(2) will be interpreted as regular file in vfs2 as well Updates #2923 PiperOrigin-RevId: 320074267
2020-07-06Add support for SO_RCVBUF/SO_SNDBUF for AF_PACKET sockets.Bhasker Hariharan
Updates #2746 PiperOrigin-RevId: 319887810
2020-07-06Merge pull request #3110 from craig08:add-missing-ICRNLgVisor bot
PiperOrigin-RevId: 319827554
2020-07-01Update preadv2/pwritev2 flag handling in vfs2.Dean Deng
We do not support RWF_SYNC/RWF_DSYNC and probably shouldn't silently accept them, since the user may incorrectly believe that we are synchronizing I/O. Remove the pwritev2 test verifying that we support these flags. gvisor.dev/issue/2601 is the tracking bug for deciding which RWF_.* flags we need and supporting them. Updates #2923, #2601. PiperOrigin-RevId: 319351286
2020-07-01Use directory fds in sticky test to avoid permission issues.Dean Deng
After we change credentials, it is possible that we no longer have access to the sticky directory where we are trying to delete files. Use an open fd so this is not an issue. PiperOrigin-RevId: 319306255
2020-07-01Port fallocate to VFS2.Zach Koopmans
PiperOrigin-RevId: 319283715
2020-07-01Complete async signal delivery support in vfs2.Dean Deng
- Support FIOASYNC, FIO{SET,GET}OWN, SIOC{G,S}PGRP (refactor getting/setting owner in the process). - Unset signal recipient when setting owner with pid == 0 and valid owner type. Updates #2923. PiperOrigin-RevId: 319231420
2020-06-30Remove struct packing to fix compiler warning.Dean Deng
-Waddress-of-packed-member warns on inet_aton() being used with a packed struct member. This was added in cl/291990716. PiperOrigin-RevId: 319111253
2020-06-30Add build target for the provisional style guide.Dean Deng
This includes the provisional style guide in the website and fixes the broken link from CONTRIBUTING.md. The style guide will be located under the "Community" category as it's related to contributing to the project. Also, add missing includes that were causing some presubmits to fail. PiperOrigin-RevId: 319061410
2020-06-30Add missing ICRNL flag in master termios testCraig Chi
Closes #2768
2020-06-29Refactor udp_socket_testZach Koopmans
Bring udp_socket_test into complianc by: - Eliminating IsRunningOnGvisor() invocations. - Wrapping sockets in RAII FileDescriptor objects. - Creating a Bind() method so that the first bind happens on port 0. PiperOrigin-RevId: 318909396
2020-06-27Port GETOWN, SETOWN fcntls to vfs2.Dean Deng
Also make some fixes to vfs1's F_SETOWN. The fcntl test now entirely passes on vfs2. Fixes #2920. PiperOrigin-RevId: 318669529
2020-06-27Support sticky bit in vfs2.Dean Deng
Updates #2923. PiperOrigin-RevId: 318648128
2020-06-26Add tests for eventfd/timerfd/inotify operations that should return ESPIPE.Dean Deng
PiperOrigin-RevId: 318585377
2020-06-26IPv6 raw sockets. Needed for ip6tables.Kevin Krakauer
IPv6 raw sockets never include the IPv6 header. PiperOrigin-RevId: 318582989
2020-06-26Implement SO_NO_CHECK socket option.gVisor bot
SO_NO_CHECK is used to skip the UDP checksum generation on a TX socket (UDP checksum is optional on IPv4). Test: - TestNoChecksum - SoNoCheckOffByDefault (UdpSocketTest) - SoNoCheck (UdpSocketTest) Fixes #3055 PiperOrigin-RevId: 318575215
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