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2020-07-27Merge pull request #2958 from lubinszARM:pr_vfs2_1gVisor bot
PiperOrigin-RevId: 323443142
2020-07-27Add device implementation for /dev/fuseRidwan Sharif
This PR adds the following: - [x] Marshall-able structs for fuse headers - [x] Data structures needed in /dev/fuse to communicate with the daemon server - [x] Implementation of the device interface - [x] Go unit tests This change adds the `/dev/fuse` implementation. `Connection` controls the communication between the server and the sentry. The FUSE server uses the `FileDescription` interface to interact with the Sentry. The Sentry implmenetation of fusefs, uses `Connection` and the Connection interface to interact with the Server. All communication messages are in the form of `go_marshal` backed structs defined in the ABI package. This change also adds some go unit tests that test (pretty basically) the interfaces and should be used as an example of an end to end FUSE operation. COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/3083 from ridwanmsharif:ridwanmsharif/fuse-device-impl 69aa2ce970004938fe9f918168dfe57636ab856e PiperOrigin-RevId: 323428180
2020-07-27Move platform.File in memmapAndrei Vagin
The subsequent systrap changes will need to import memmap from the platform package. PiperOrigin-RevId: 323409486
2020-07-24Enable automated marshalling for netstack.Ayush Ranjan
PiperOrigin-RevId: 322954792
2020-07-23Merge pull request #3142 from tanjianfeng:fix-3141gVisor bot
PiperOrigin-RevId: 322937495
2020-07-23Add permission checks to vfs2 truncate.Dean Deng
- Check write permission on truncate(2). Unlike ftruncate(2), truncate(2) fails if the user does not have write permissions on the file. - For gofers under InteropModeShared, check file type before making a truncate request. We should fail early and avoid making an rpc when possible. Furthermore, depending on the remote host's failure may give us unexpected behavior--if the host converts the truncate request to an ftruncate syscall on an open fd, we will get EINVAL instead of EISDIR. Updates #2923. PiperOrigin-RevId: 322913569
2020-07-23FileDescription is hard to spell.Dean Deng
Fix typos. PiperOrigin-RevId: 322913282
2020-07-23Add AfterFunc to tcpip.ClockSam Balana
Changes the API of tcpip.Clock to also provide a method for scheduling and rescheduling work after a specified duration. This change also implements the AfterFunc method for existing implementations of tcpip.Clock. This is the groundwork required to mock time within tests. All references to CancellableTimer has been replaced with the tcpip.Job interface, allowing for custom implementations of scheduling work. This is a BREAKING CHANGE for clients that implement their own tcpip.Clock or use tcpip.CancellableTimer. Migration plan: 1. Add AfterFunc(d, f) to tcpip.Clock 2. Replace references of tcpip.CancellableTimer with tcpip.Job 3. Replace calls to tcpip.CancellableTimer#StopLocked with tcpip.Job#Cancel 4. Replace calls to tcpip.CancellableTimer#Reset with tcpip.Job#Schedule 5. Replace calls to tcpip.NewCancellableTimer with tcpip.NewJob. PiperOrigin-RevId: 322906897
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
2020-07-23Add task work mechanism.Dean Deng
Like task_work in Linux, this allows us to register callbacks to be executed before returning to userspace. This is needed for kcov support, which requires coverage information to be up-to-date whenever we are in user mode. We will provide coverage data through the kcov interface to enable coverage-directed fuzzing in syzkaller. One difference from Linux is that task work cannot queue work before the transition to userspace that it precedes; queued work will be picked up before the next transition. PiperOrigin-RevId: 322889984
2020-07-23kvm-tls-2:add the preservation of user-TLS in the Arm64 kvm platformlubinszARM
This patch load/save TLS for the container application. Related issue: full context-switch supporting for Arm64 #1238 COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/2761 from lubinszARM:pr_tls_2 cb5dbca1c9c3f378002406da7a58887f9b5032b3 PiperOrigin-RevId: 322887044
2020-07-23Use mode supplied by the mount optionsRidwan Sharif
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.
2020-07-23Marshallable socket opitons.Ayush Ranjan
Socket option values are now required to implement marshal.Marshallable. Co-authored-by: Rahat Mahmood <rahat@google.com> PiperOrigin-RevId: 322831612
2020-07-23Port sendfile to vfs2.Nicolas Lacasse
And do some refactoring of the wait logic in sendfile/splice/tee. Updates #1035 #2923 PiperOrigin-RevId: 322815521
2020-07-23[vfs2][gofer] Fix update attributes race condition.Ayush Ranjan
We were getting the file attributes before locking the metadataMu which was causing stale updates to the file attributes. Fixes OpenTest_AppendConcurrentWrite. Updates #2923 PiperOrigin-RevId: 322804438
2020-07-22iptables: replace maps with arraysKevin Krakauer
For iptables users, Check() is a hot path called for every packet one or more times. Let's avoid a bunch of map lookups. PiperOrigin-RevId: 322678699
2020-07-22[vfs2][tmpfs] Implement O_APPENDAyush Ranjan
Updates #2923 PiperOrigin-RevId: 322671489
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
2020-07-16Add support to return protocol in recvmsg for AF_PACKET.Bhasker Hariharan
Updates #173 PiperOrigin-RevId: 321690756
2020-07-15Merge pull request #3236 from craig08:fuse-kernfs-inode-stat-add-ctxgVisor bot
PiperOrigin-RevId: 321496734
2020-07-15fdbased: Vectorized write for packet; relax writev syscall filter.Ting-Yu Wang
Now it calls pkt.Data.ToView() when writing the packet. This may require copying when the packet is large, which puts the worse case in an even worse situation. This sent out in a separate preparation change as it requires syscall filter changes. This change will be followed by the change for the adoption of the new PacketHeader API. PiperOrigin-RevId: 321447003
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
2020-07-15hostinet: fix fd leak in fdnotifier for VFS2Tiwei Bie
When we failed to create the new socket after adding the fd to fdnotifier, we should remove the fd from fdnotifier, because we are going to close the fd directly. Fixes: #3241 Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
2020-07-14Update special file option name in comment.Dean Deng
PiperOrigin-RevId: 321269281
2020-07-14Include context in kernfs.Inode.Stat methodCraig Chi
To implement stat(2) in FUSE, we have to embed credentials and pid in request header. The information should be extracted from the context passed to VFS layer. Therefore `Stat()` signature in `kernfs.Inode` interface should include context as first argument. Some other fs implementations need to be modified as well, such as devpts, host, pipefs, and proc. Fixes #3235
2020-07-13Merge pull request #3200 from lubinszARM:pr_kvm_ut_1gVisor bot
PiperOrigin-RevId: 321060717
2020-07-13Merge pull request #2672 from amscanne:shim-integratedgVisor bot
PiperOrigin-RevId: 321053634
2020-07-13Disable debug time adjustment loggingFabricio Voznika
When --debug is enabled, the following log messages are printed every second filling up the log: D0430 18:04:42.823775 129561 parameters.go:238] Clock(Monotonic): error: 46 ns, adjusted frequency from 3591713733 Hz to 3591714196 Hz D0430 18:04:42.823870 129561 parameters.go:238] Clock(Realtime): error: 36 ns, adjusted frequency from 3591714003 Hz to 3591714169 Hz D0430 18:04:42.823892 129561 timekeeper.go:209] Updating VDSO parameters: {monotonicReady:1 monotonicBaseCycles:15758797714254696 monotonicBaseRef:29000233837 monotonicFrequency:3591714196 realtimeReady:1 realtimeBaseCycles:15758797714610880 realtimeBaseRef:1588269882823867374 realtimeFrequency:3591714169} Info and warning messages for larger changes are kept the same. PiperOrigin-RevId: 321048523
2020-07-13Clean up inotify comments.Dean Deng
PiperOrigin-RevId: 321028238
2020-07-13[vfs2] Make gofer metadata atomics consistentAyush Ranjan
For accessing metadata fields: - If metadataMu is locked, we can access without atomics - If metadataMu is unlocked, we should use atomics For mutating metadata fields: - Always lock metadataMu and use atomics. There were some instances of inconsistencies which have been fixed. PiperOrigin-RevId: 321022895
2020-07-13Merge pull request #3136 from lubinszARM:pr_sys64_1gVisor bot
PiperOrigin-RevId: 321020733
2020-07-11Stub out SO_DETACH_FILTER.Bhasker Hariharan
Updates #2746 PiperOrigin-RevId: 320757963
2020-07-10Split the kvm ut test cases to correspond to different platformsBin Lu
Split the kvm ut test cases to pass unit-tests on Arm64. I will add the tls and full-context test cases for Arm64 later. Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-07-09Discard multicast UDP source address.gVisor bot
RFC-1122 (and others) specify that UDP should not receive datagrams that have a source address that is a multicast address. Packets should never be received FROM a multicast address. See also, RFC 768: 'User Datagram Protocol' J. Postel, ISI, 28 August 1980 A UDP datagram received with an invalid IP source address (e.g., a broadcast or multicast address) must be discarded by UDP or by the IP layer (see rfc 1122 Section 3.2.1.3). This CL does not address TCP or broadcast which is more complicated. Also adds a test for both ipv6 and ipv4 UDP. Fixes #3154 PiperOrigin-RevId: 320547674
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.
2020-07-08Add shared mount hints to VFS2Fabricio Voznika
Container restart test is disabled for VFS2 for now. Updates #1487 PiperOrigin-RevId: 320296401
2020-07-07[vfs2] Remove VFS1 usage in VDSO.Ayush Ranjan
Removed VDSO dependency on VFS1. Resolves #2921 PiperOrigin-RevId: 320122176
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
2020-07-06Call fdnotifier.UpdateFD() from fsimpl/gofer.specialFileFD.Jamie Liu
The fdnotifier package provides an API to a thread that continually epolls arbitrary host FDs. The set of events polled for each host FD is (intended to be) all events for which a waiter.Entry has expressed interest, as returned by waiter.Queue.Events() for the waiter.Queue registered to the given host FD. When the set of events changes (due to a change in the set of registered waiter.Entries), the mutator must call fdnotifier.UpdateFD() to recalculate the new event set and propagate it to the epoll FD. PiperOrigin-RevId: 319924719
2020-07-06Ensure sync is called for readonly fileFabricio Voznika
Calling sync on a readonly file flushes metadata that may have been modified, like last access time. Updates #1198 PiperOrigin-RevId: 319888290
2020-07-06Add inode number to synthetic dentriesFabricio Voznika
Reserve the MSB from ino for synthetic dentries to prevent conflict with regular dentries. Log warning in case MSB is set for regular dentries. Updates #1487 PiperOrigin-RevId: 319869858
2020-07-06hostinet: fix not specifying family fieldJianfeng Tan
Creating sockets by hostinet with VFS2 fails due to triggerring a seccomp violation. In essence, we fails to pass down the field of family. We fix this by passing down this field, family. Fixes #3141 Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com>
2020-07-03allow guest user applications read ctr_el0 on Arm64Bin Lu
At present, when doing syscall_kvm test, we need to enable the function of ESR_ELx_SYS64_ISS_SYS_CTR_READ to successfully pass the test. I set SCTLR_EL1.UCT==1, so that the related cases can passed. Signed-off-by: Bin Lu <bin.lu@arm.com>
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
2020-07-01[vfs2][gofer] Fix mmap syscall test.Ayush Ranjan
We were not invalidating mappings when the file size changed in shared mode. Enabled the syscall test for vfs2. Updates #2923 PiperOrigin-RevId: 319346569
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