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2021-09-28Implement Registry.FindOrCreate.Zyad A. Ali
FindOrCreate implements the behaviour of mq_open(2). Updates #136
2021-09-28Return FDs in RegistryImpl functions and use Views.Zyad A. Ali
Update RegistryImpl functions to return file descriptions, instead of queues, and use Views in queue inodes. Updates #136
2021-09-28Define mq.View and use it for mqfs.queueFD.Zyad A. Ali
View makes it easier to handle O_RDONLY, O_WRONLY, and ORDWR options in mq_open(2). Updates #136
2021-09-28Initialize POSIX queues' registry after creating a new IPCNamespace.Zyad A. Ali
Updates #136
2021-09-28Move filesystem creation from GetFilesystem to RegistryImpl.Zyad A. Ali
Move root dentry and filesystem creation from GetFilesystem to NewRegistryImpl, create IPCNamespace.InitPosixQueues to create a new mqueue filesystem for each ipc namespace, and update GetFilesystem to retreive fs and root dentry from IPCNamespace and return them. Updates #136
2021-09-17Move CtxIPCNamespace to kernel/ipc package.Zyad A. Ali
CtxIPCNamespace is needed by mqfs package to be able to retreive an IPCNamespace using ctx.Value. As ctx.Value compares keys as interfaces, we need to use type kernel.contextID in package mqfs, which is not possible due to circular depenedency, so move it to kernel/ipc instead. Updates #136
2021-09-17Create mq.Registry and mqfs.RegistryImpl.Zyad A. Ali
Define a POSIX message queue Registry and RegistryImpl in mq package, implement RegistryImpl in mqfs, and add a Registry object to IPCNamespace initialized at filesystem creation. Updates #136
2021-09-15Implement queueInode and queueFD in mqfs.Zyad A. Ali
Implement inode and file description representing a POSIX message queue, and other utilities needed to implement file operations. Updates #136
2021-09-15Create mq package.Zyad A. Ali
Create package mq to implement POSIX message queues, and define initial struct definitions. Updates #136
2021-09-15Add abi definitions for POSIX message queues.Zyad A. Ali
Updates #136
2021-09-15Implement vfs.FilesystemType and kernfs.Filesystem for mqfs.Zyad A. Ali
Updates #136
2021-09-15Implement mqfs.rootInode.Zyad A. Ali
rootInode represents the root inode for mqueue filesystem (/dev/mqueue). Updates #136
2021-09-15[bind] Return EINVAL for under sized addressGhanan Gowripalan
...and EAFNOSUPPORT for unexpected address family. To comply with Linux. Updates #6021, #6575. PiperOrigin-RevId: 396893590
2021-09-14Compose raw IP with datagram-based endpointGhanan Gowripalan
A raw IP endpoint's write and socket option get/set path can use the datagram-based endpoint. This change extracts tests from UDP that may also run on Raw IP sockets. Updates #6565. Test: Raw IP + datagram-based socket syscall tests. PiperOrigin-RevId: 396729727
2021-09-14Fix race on msgrcv(MSG_COPY).Rahat Mahmood
Previously, we weren't making a copy when a sysv message queue was receiving a message with the MSG_COPY flag. This flag indicates the message being received should be left in the queue and a copy of the message should be returned to userspace. Without the copy, a racing process can modify the original message while it's being marshalled to user memory. Reported-by: syzbot+cb15e644698b20ff4e17@syzkaller.appspotmail.com PiperOrigin-RevId: 396712856
2021-09-14Explicitly bind endpoint to a NICGhanan Gowripalan
Previously, any time a datagram-based network endpoint (e.g. UDP) was bound, the bound NIC is always set based on the bound address (if specified). However, we should only consider the endpoint bound to an NIC if a NIC was explicitly bound to. If an endpoint has been bound to an address and attempts to send packets to an unconnected remote, the endpoint will default to sending packets through the bound address' NIC if not explicitly bound to a NIC. Updates #6565. PiperOrigin-RevId: 396712415
2021-09-14Fix bug in RecvMMsgDispatcher.Bhasker Hariharan
Fixed a bug introduced in the following commit: https://github.com/google/gvisor/commit/979d6e7d77b17e94defc29515180cc75d3560383 The commit introduced a bug which causes the recvmmsg dispatcher to never exit as BlockingPoll is now called with two fds and poll will not return an error anymore if one of the FD is closed. We need to explicitly check the events for each FD to determine if the sentry FD is closed. ReadV dispatcher does not have the same issue as Readv does not rely on sk_err field of the underlying socket to determine if the socket is in an error state. Recvmmsg OTOH seems to get confused and always returns EAGAIN if poll() is called which queries the sk_err field and clears it. PiperOrigin-RevId: 396676135
2021-09-14Defer mutex unlockingGhanan Gowripalan
PiperOrigin-RevId: 396670516
2021-09-13Accept packets destined to bound addressGhanan Gowripalan
...if bound to an address. We previously checked the source of a packet instead of the destination of a packet when bound to an address. PiperOrigin-RevId: 396497647
2021-09-13Typo fix.Etienne Perot
PiperOrigin-RevId: 396476303
2021-09-13Set NICID before delivering packet to raw endpointGhanan Gowripalan
...as raw endpoints expect the packet's NICID to be set. PiperOrigin-RevId: 396446552
2021-09-13Separate IPv4 ToS & IPv6 TClass in dgram endpointGhanan Gowripalan
Setting the ToS for IPv4 packets (SOL_IP, IP_TOS) should not affect the Traffic Class of IPv6 packets (SOL_IPV6, IPV6_TCLASS). Also only return the ToS value XOR Traffic Class as a packet cannot be both an IPv4 and an IPv6 packet; It is invalid to return both the IPv4 ToS and IPv6 Traffic Class control messages when reading packets. Updates #6389. PiperOrigin-RevId: 396399096
2021-09-13Support anonymous structs in checklocks.Adin Scannell
Fixes #6558 PiperOrigin-RevId: 396393293
2021-09-10Typo fix.Etienne Perot
PiperOrigin-RevId: 396042572
2021-09-09Remove linux-compat loopback hacks from packet endpointGhanan Gowripalan
Previously, gVisor did not represent loopback devices as an ethernet device as Linux does. To maintain Linux API compatibility for packet sockets, a workaround was used to add an ethernet header if a link header was not already present in the packet buffer delivered to a packet endpoint. However, this workaround is a bug for non-ethernet based interfaces; not all links use an ethernet header (e.g. pure L3/TUN interfaces). As of 3b4bb947517d0d9010120aaa1c3989fd6abf278e, gVisor represents loopback devices as an ethernet-based device so this workaround can now be removed. BUG: https://fxbug.dev/81592 Updates #6530, #6531. PiperOrigin-RevId: 395819151
2021-09-09Internal change.Jamie Liu
PiperOrigin-RevId: 395809193
2021-09-09Remove link/packetsocketGhanan Gowripalan
This change removes NetworkDispatcher.DeliverOutboundPacket. Since all packet writes go through the NIC (the only NetworkDispatcher), we can deliver outgoing packets to interested packet endpoints before writing the packet to the link endpoint as the stack expects that all packets that get delivered to a link endpoint are transmitted on the wire. That is, link endpoints no longer need to let the stack know when it writes a packet as the stack already knows about the packet it writes through a link endpoint. PiperOrigin-RevId: 395761629
2021-09-07Stub some memory control files.Rahat Mahmood
PiperOrigin-RevId: 395338926
2021-09-07Remove protocolMainLoop unused return valueArthur Sfez
PiperOrigin-RevId: 395325998
2021-09-03Add //pkg/sentry/seccheck.Jamie Liu
This defines common infrastructure for dynamically-configured security checks, including an example usage in the clone(2) path. PiperOrigin-RevId: 394797270
2021-09-02Internal change.Jamie Liu
PiperOrigin-RevId: 394560866
2021-09-02unix: avoid taking two endpoint locksAndrei Vagin
If we want to take two endpoint locks, we need to be sure that we always take them in the same order. Accept() locks the listening endpoint to work with acceptedChan and then it calls GetLocalAddress that locks an accepted endpoint. Actually, we can release the listening endpoint lock before calling GetLocalAddress. Reported-by: syzbot+f52bd603f51a4ae91054@syzkaller.appspotmail.com PiperOrigin-RevId: 394553823
2021-09-01Support sending with packet socketsGhanan Gowripalan
...through the loopback interface, only. This change only supports sending on packet sockets through the loopback interface as the loopback interface is the only interface used in packet socket syscall tests - the other link endpoints are not excercised with the existing test infrastructure. Support for sending on packet sockets through the other interfaces will be added as needed. BUG: https://fxbug.dev/81592 PiperOrigin-RevId: 394368899
2021-09-01Out-of-order segment should not block in-sequence segments.Bhasker Hariharan
For a small receive buffer the first out-of-order segment will get accepted and fill up the receive buffer today. This change now includes the size of the out-of-order segment when checking whether to queue the out of order segment or not. PiperOrigin-RevId: 394351309
2021-09-01Extract network datagram endpoint common facilitiesGhanan Gowripalan
...from the UDP endpoint. Datagram-based transport endpoints (e.g. UDP, RAW IP) can share a lot of their write path due to the datagram-based nature of these endpoints. Extract the common facilities from UDP so they can be shared with other transport endpoints (in a later change). Test: UDP syscall tests. PiperOrigin-RevId: 394347774
2021-09-01Add ioctl stub constantsChong Cai
PiperOrigin-RevId: 394331928
2021-09-01Don't use reflection in fpu.alignedBytes.Jamie Liu
reflect.ValueOf takes an interface{}, so when passed a slice the compiler emits a call to runtime.convTslice to heap-allocate a copy of the slice header. PiperOrigin-RevId: 394310052
2021-09-01Cache vdso.so's __kernel_rt_sigreturn location.Jamie Liu
PiperOrigin-RevId: 394300607
2021-09-01Propagate vfs.MkdirOptions.ForSyntheticMountpoint to overlay copy-up.Jamie Liu
PiperOrigin-RevId: 394296687
2021-09-01unix: handle a case when a buffer is overflowedAndrei Vagin
Reported-by: syzbot+1aab6800bd14829609b8@syzkaller.appspotmail.com PiperOrigin-RevId: 394279838
2021-09-01Cache cpuid.HostFeatureSet().Jamie Liu
PiperOrigin-RevId: 394261815
2021-08-30[syserr] Fix SIGBUS on syserr.FromErrorZach Koopmans
Fix syzcaller panic SIGBUS on error handling. Done by adding an interface, errors.GuestError, which errors can implement in order to be compared against each other. PiperOrigin-RevId: 393867554
2021-08-30Narrow COW-break on thread stacks.Jamie Liu
PiperOrigin-RevId: 393841270
2021-08-30Use specialFileFD handles in specialFileFD.Stat().Jamie Liu
PiperOrigin-RevId: 393831108
2021-08-30Avoid pseudo endpoint for TSVal generationZeling Feng
PiperOrigin-RevId: 393808461
2021-08-27Fix lock order violations: mm.mappingMu > Task.mu.Nicolas Lacasse
Document this ordering in mm/mm.go. PiperOrigin-RevId: 393413203
2021-08-27Merge pull request #6415 from ZachEddy:containerd-runtime-options-v1.5gVisor bot
PiperOrigin-RevId: 393411409
2021-08-27Add LinkEndpoint.WriteRawPacket with stubsGhanan Gowripalan
...returning unsupported errors. PiperOrigin-RevId: 393388991
2021-08-26Add Stack.Seed() backZeling Feng
... because it is still used by fuchsia. PiperOrigin-RevId: 393246904
2021-08-26Centralize TCP timestamp logicTamir Duberstein
Remove freestanding functions that convert time values to raw integers; centralize time->uint32 logic in methods on tcp.endpoint. Importantly, the knowledge that TSVal is in milliseconds now lives in adjacent functions rather than being spread around various files. Incidental cleanup: - Remove unused constant - Remove redundant conversion - Remove redundant parentheses - Add missing error check PiperOrigin-RevId: 393184768
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