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2020-09-27Merge release-20200921.0-54-gfa995da84 (automated)gVisor bot
2020-09-27Fix kernfs race condition.Dean Deng
Do not release dirMu between checking whether to create a child and actually inserting it. Also fixes a bug in fusefs which was causing it to deadlock under the new lock ordering. We do not need to call kernfs.Dentry.InsertChild from newEntry because it will always be called at the kernfs filesystem layer. Updates #1193. PiperOrigin-RevId: 334049264
2020-09-27Merge release-20200921.0-53-g2a60f9229 (automated)gVisor bot
2020-09-27Clean up kcov.Dean Deng
Previously, we did not check the kcov mode when performing task work. As a result, disabling kcov did not do anything. Also avoid expensive atomic RMW when consuming coverage data. We don't need the swap if the value is already zero (which is most of the time), and it is ok if there are slight inconsistencies due to a race between coverage data generation (incrementing the value) and consumption (reading a nonzero value and writing zero). PiperOrigin-RevId: 334049207
2020-09-27Merge release-20200921.0-52-ga376a0baf (automated)gVisor bot
2020-09-26Remove generic ICMP errorsGhanan Gowripalan
Generic ICMP errors were required because the transport dispatcher was given the responsibility of sending ICMP errors in response to transport packet delivery failures. Instead, the transport dispatcher should let network layer know it failed to deliver a packet (and why) and let the network layer make the decision as to what error to send (if any). Fixes #4068 PiperOrigin-RevId: 333962333
2020-09-24Remove useless endpoint constructionTamir Duberstein
PiperOrigin-RevId: 333591566
2020-09-24Merge release-20200914.0-158-g832d91b80 (automated)gVisor bot
2020-09-24[vfs] kernfs: Do not hold reference on the inode when opening FD.Ayush Ranjan
The FD should hold a reference on the dentry they were opened on which in turn holds a reference on the inode it points to. PiperOrigin-RevId: 333589223
2020-09-24Merge release-20200914.0-155-g90d9d0e7b (automated)gVisor bot
2020-09-24Correct FS_IOC_GETFLAGS valueChong Cai
The previous value was for unix PiperOrigin-RevId: 333571962
2020-09-24Merge release-20200914.0-154-g2a10bc1e4 (automated)gVisor bot
2020-09-24[vfs] [2/2] kernfs: kernfs: Internally use kernfs.Dentry instead of vfs.Dentry.Ayush Ranjan
Update signatures for: - All methods in inodeDirectory - deferDecRef() and Filesystem.droppedDentries - newSyntheticDirectory() - `slot`s used in OrderedChildren and subsequent methods like replaceChildLocked() and checkExistingLocked() - stepExistingLocked(), walkParentDirLocked(), checkCreateLocked() Updates #1193 PiperOrigin-RevId: 333558866
2020-09-24Merge release-20200914.0-152-g0a7075f38 (automated)gVisor bot
2020-09-24Add basic stateify annotations.Adin Scannell
Updates #1663 PiperOrigin-RevId: 333539293
2020-09-24Merge release-20200914.0-151-g5d50c91c4 (automated)gVisor bot
2020-09-24Change segment/pending queue to use receive buffer limits.Bhasker Hariharan
segment_queue today has its own standalone limit of MaxUnprocessedSegments but this can be a problem in UnlockUser() we do not release the lock till there are segments to be processed. What can happen is as handleSegments dequeues packets more keep getting queued and we will never release the lock. This can keep happening even if the receive buffer is full because nothing can read() till we release the lock. Further having a separate limit for pending segments makes it harder to track memory usage etc. Unifying the limits makes it easier to reason about memory in use and makes the overall buffer behaviour more consistent. PiperOrigin-RevId: 333508122
2020-09-24Merge release-20200914.0-147-g3838e83a9 (automated)gVisor bot
2020-09-23fuse: don't call dentry.InsertChildAndrei Vagin
It is called from the kernfs code (OpenAt and revalidateChildLocked()). For RemoveChildLocked, it is opposed. We need to call it from fuse.RmDir and fuse.Unlink. PiperOrigin-RevId: 333453218
2020-09-24Merge release-20200914.0-145-g6410e74a9 (automated)gVisor bot
2020-09-23Add more descriptive comments on mount options.Dean Deng
PiperOrigin-RevId: 333447255
2020-09-24Merge release-20200914.0-144-g08bbad690 (automated)gVisor bot
2020-09-23[vfs] kernfs: Enable leak checking consistently.Ayush Ranjan
There were some instances where we were not enabling leak checking. PiperOrigin-RevId: 333418571
2020-09-23Let underlying fs handle LockFD in verity fsChong Cai
PiperOrigin-RevId: 333412836
2020-09-24Merge release-20200914.0-141-ge02e7e999 (automated)gVisor bot
2020-09-23Remove unused field from neighborEntryGhanan Gowripalan
PiperOrigin-RevId: 333405169
2020-09-23Set verity underlying fs mount as internalChong Cai
PiperOrigin-RevId: 333404727
2020-09-23Merge release-20200914.0-138-gd00207ff4 (automated)gVisor bot
2020-09-23Merge release-20200914.0-137-g99decaadd (automated)gVisor bot
2020-09-23Extract ICMP error sender from UDPJulian Elischer
Store transport protocol number on packet buffers for use in ICMP error generation. Updates #2211. PiperOrigin-RevId: 333252762
2020-09-23Merge release-20200914.0-136-gb54dbdfdc (automated)gVisor bot
2020-09-22Handle EOF properly in splice/sendfile.Dean Deng
Use HandleIOErrorVFS2 instead of custom error handling. PiperOrigin-RevId: 333227581
2020-09-23Merge release-20200914.0-135-gc0f21bb19 (automated)gVisor bot
2020-09-22pkg/buffer: Reorganize internal structure to allow dynamic sizes.Ting-Yu Wang
This change changes `buffer.data` into a `[]byte`, from `[bufferSize]byte`. In exchange, each `buffer` is now grouped together to reduce the number of allocation. Plus, `View` now holds an embeded list of `buffer` (via `pool`) to support the happy path which the number of buffer is small. Expect no extra allocation for the happy path. It is to enable the use case for PacketBuffer, which * each `View` is small (way less than `defaultBufferSize`), and * needs to dynamically transfer ownership of `[]byte` to `View`. (to allow gradual migration) PiperOrigin-RevId: 333197252
2020-09-22Merge release-20200914.0-134-gcf3cef117 (automated)gVisor bot
2020-09-22Refactor testutil.TestEndpoint and use it instead of limitedEPArthur Sfez
The new testutil.MockLinkEndpoint implementation is not composed by channel.Channel anymore because none of its features were used. PiperOrigin-RevId: 333167753
2020-09-22Merge release-20200914.0-133-g20dc83c9e (automated)gVisor bot
2020-09-22[vfs] [1/2] kernfs: Internally use kernfs.Dentry instead of vfs.Dentry.Ayush Ranjan
Update signatures for: - walkExistingLocked - checkDeleteLocked - Inode.Open Updates #1193 PiperOrigin-RevId: 333163381
2020-09-22Merge release-20200914.0-132-g778c36717 (automated)gVisor bot
2020-09-22Fix panic in `runsc flags`Fabricio Voznika
When printing flags, FlagSet.PrintDefaults compares the Zero value to the flag default value. The Zero refs.LeakMode value was panicking in String() because it didn't expect the default to be used Closes #4023 PiperOrigin-RevId: 333150836
2020-09-22Merge release-20200914.0-131-g6e5ea605f (automated)gVisor bot
2020-09-22Move stack.fakeClock into a separate packageToshi Kikuchi
PiperOrigin-RevId: 333138701
2020-09-22Merge release-20200914.0-130-g13a9a622e (automated)gVisor bot
2020-09-22Merge release-20200914.0-129-gf134f873f (automated)gVisor bot
2020-09-22Merge release-20200914.0-128-g742e58b87 (automated)gVisor bot
2020-09-21Allow partial writes for gofer.specialFileFD.Dean Deng
Originally, we avoided partial writes in case it caused us to write a partial packet to a socket-backed specialFileFD. However, this check causes splicing from a pipe to specialFileFD to fail if we hit EOF on the pipe. PiperOrigin-RevId: 333016216
2020-09-21Merge release-20200914.0-127-g059d90b9f (automated)gVisor bot
2020-09-21Merge release-20200914.0-126-g73f3a34b5 (automated)gVisor bot
2020-09-21Merge release-20200914.0-125-g06dbd5b7b (automated)gVisor bot
2020-09-21Merge release-20200914.0-124-g10dcefbc7 (automated)gVisor bot
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