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2020-06-18Merge release-20200608.0-82-g07ff909e7 (automated)gVisor bot
2020-06-18Support setsockopt SO_SNDBUF/SO_RCVBUF for raw/udp sockets.Bhasker Hariharan
Updates #173,#6 Fixes #2888 PiperOrigin-RevId: 317087652
2020-06-16Merge release-20200608.0-67-gdbf786c6b (automated)gVisor bot
2020-06-16Add runsc options to set checksum offloading statusgVisor bot
--tx-checksum-offload=<true|false> enable TX checksum offload (default: false) --rx-checksum-offload=<true|false> enable RX checksum offload (default: true) Fixes #2989 PiperOrigin-RevId: 316781309
2020-06-16Merge release-20200608.0-64-gbae147560 (automated)gVisor bot
2020-06-16Print spec as json when --debug is enabledFabricio Voznika
The previous format skipped many important structs that are pointers, especially for cgroups. Change to print as json, removing parts of the spec that are not relevant. Also removed debug message from gofer that can be very noisy when directories are large. PiperOrigin-RevId: 316713267
2020-06-12Merge release-20200522.0-147-g8ea99d58f (automated)gVisor bot
2020-06-11Set the HOME environment variable for sub-containers.Ian Lewis
Fixes #701 PiperOrigin-RevId: 316025635
2020-06-12Merge release-20200522.0-145-g77c206e37 (automated)gVisor bot
2020-06-11Add //pkg/sentry/fsimpl/overlay.Jamie Liu
Major differences from existing overlay filesystems: - Linux allows lower layers in an overlay to require revalidation, but not the upper layer. VFS1 allows the upper layer in an overlay to require revalidation, but not the lower layer. VFS2 does not allow any layers to require revalidation. (Now that vfs.MkdirOptions.ForSyntheticMountpoint exists, no uses of overlay in VFS1 are believed to require upper layer revalidation; in particular, the requirement that the upper layer support the creation of "trusted." extended attributes for whiteouts effectively required the upper filesystem to be tmpfs in most cases.) - Like VFS1, but unlike Linux, VFS2 overlay does not attempt to make mutations of the upper layer atomic using a working directory and features like RENAME_WHITEOUT. (This may change in the future, since not having a working directory makes error recovery for some operations, e.g. rmdir, particularly painful.) - Like Linux, but unlike VFS1, VFS2 represents whiteouts using character devices with rdev == 0; the equivalent of the whiteout attribute on directories is xattr trusted.overlay.opaque = "y"; and there is no equivalent to the whiteout attribute on non-directories since non-directories are never merged with lower layers. - Device and inode numbers work as follows: - In Linux, modulo the xino feature and a special case for when all layers are the same filesystem: - Directories use the overlay filesystem's device number and an ephemeral inode number assigned by the overlay. - Non-directories that have been copied up use the device and inode number assigned by the upper filesystem. - Non-directories that have not been copied up use a per-(overlay, layer)-pair device number and the inode number assigned by the lower filesystem. - In VFS1, device and inode numbers always come from the lower layer unless "whited out"; this has the adverse effect of requiring interaction with the lower filesystem even for non-directory files that exist on the upper layer. - In VFS2, device and inode numbers are assigned as in Linux, except that xino and the samefs special case are not supported. - Like Linux, but unlike VFS1, VFS2 does not attempt to maintain memory mapping coherence across copy-up. (This may have to change in the future, as users may be dependent on this property.) - Like Linux, but unlike VFS1, VFS2 uses the overlayfs mounter's credentials when interacting with the overlay's layers, rather than the caller's. - Like Linux, but unlike VFS1, VFS2 permits multiple lower layers in an overlay. - Like Linux, but unlike VFS1, VFS2's overlay filesystem is application-mountable. Updates #1199 PiperOrigin-RevId: 316019067
2020-06-11Merge release-20200522.0-123-gab4c85189 (automated)gVisor bot
2020-06-10Cgroup fixesFabricio Voznika
- Set hugetlb related fields - Add realtime scheduler related fields - Beef up unit tests Updates #2713 PiperOrigin-RevId: 315797979
2020-06-10Merge release-20200522.0-122-g41d9e536d (automated)gVisor bot
2020-06-10Skip pids.max if value is zeroFabricio Voznika
LinuxPids.Limit is the only optional cgroup field in OCI that is not a pointer. If value is 0 or negative it should be skipped. PiperOrigin-RevId: 315791909
2020-06-09Merge release-20200522.0-105-g0ae5bd24d (automated)gVisor bot
2020-06-09Mount root and volumes as read-only if --overlay is enabledFabricio Voznika
PiperOrigin-RevId: 315583963
2020-06-09Merge release-20200522.0-99-g4e96b9491 (automated)gVisor bot
2020-06-08Combine executable lookup codeFabricio Voznika
Run vs. exec, VFS1 vs. VFS2 were executable lookup were slightly different from each other. Combine them all into the same logic. PiperOrigin-RevId: 315426443
2020-06-06Merge release-20200522.0-89-g21b6bc72 (automated)gVisor bot
2020-06-05Implement mount(2) and umount2(2) for VFS2.Rahat Mahmood
This is mostly syscall plumbing, VFS2 already implements the internals of mounts. In addition to the syscall defintions, the following mount-related mechanisms are updated: - Implement MS_NOATIME for VFS2, but only for tmpfs and goferfs. The other VFS2 filesystems don't implement node-level timestamps yet. - Implement the 'mode', 'uid' and 'gid' mount options for VFS2's tmpfs. - Plumb mount namespace ownership, which is necessary for checking appropriate capabilities during mount(2). Updates #1035 PiperOrigin-RevId: 315035352
2020-06-05Merge release-20200522.0-83-ge4e11f27 (automated)gVisor bot
2020-06-05Expand syscall filters to support MSAN.Nicolas Lacasse
PiperOrigin-RevId: 314997564
2020-06-05Merge release-20200522.0-76-g41da7a56 (automated)gVisor bot
2020-06-05Fix copylocks error about copying IPTables.Ting-Yu Wang
IPTables.connections contains a sync.RWMutex. Copying it will trigger copylocks analysis. Tested by manually enabling nogo tests. sync.RWMutex is added to IPTables for the additional race condition discovered. PiperOrigin-RevId: 314817019
2020-06-02Merge release-20200522.0-58-gca5912d1 (automated)gVisor bot
2020-06-01More runsc changes for VFS2Fabricio Voznika
- Add /tmp handling - Apply mount options - Enable more container_test tests - Forward signals to child process when test respaws process to run as root inside namespace. Updates #1487 PiperOrigin-RevId: 314263281
2020-06-01Merge release-20200522.0-55-g3a987160 (automated)gVisor bot
2020-06-01Handle gofer blocking opens of host named pipes in VFS2.Jamie Liu
Using tee instead of read to detect when a O_RDONLY|O_NONBLOCK pipe FD has a writer circumvents the problem of what to do with the byte read from the pipe, avoiding much of the complexity of the fdpipe package. PiperOrigin-RevId: 314216146
2020-06-01Merge release-20200522.0-53-g12f74bd6 (automated)gVisor bot
2020-06-01Include runtime goroutines in panicsMichael Pratt
SetTraceback("all") does not include all goroutines in panics (you didn't think it was that simple, did you?). It includes all _user_ goroutines; those started by the runtime (such as GC workers) are excluded. Switch to "system" to additionally include runtime goroutines, which are useful to track down bugs in the runtime itself. PiperOrigin-RevId: 314204473
2020-06-01Merge release-20200522.0-48-g16100d18 (automated)gVisor bot
2020-06-01Make gofer mount readonly when overlay is enabledFabricio Voznika
No writes are expected to the underlying filesystem when using --overlay. PiperOrigin-RevId: 314171457
2020-05-29Merge release-20200522.0-43-g93edb36c (automated)gVisor bot
2020-05-29Refactor the ResolveExecutablePath logic.Nicolas Lacasse
PiperOrigin-RevId: 313871804
2020-05-29Merge release-20200522.0-36-gf498e46e (automated)gVisor bot
2020-05-29Merge pull request #2767 from mikaelmello:add-cwd-option-specgVisor bot
PiperOrigin-RevId: 313828906
2020-05-28Merge release-20200522.0-25-gf7418e21 (automated)gVisor bot
2020-05-28Move Cleanup to its own packageFabricio Voznika
PiperOrigin-RevId: 313663382
2020-05-28Merge release-20200522.0-21-ga8c1b326 (automated)gVisor bot
2020-05-28Automated rollback of changelist 309082540Fabricio Voznika
PiperOrigin-RevId: 313636920
2020-05-27Merge release-20200518.0-45-g0bc022b7 (automated)gVisor bot
2020-05-24Add cwd option to spec cmdMikael Mello
2020-05-20Add hugetlb and rdma cgroups to runscFabricio Voznika
Updates #2713 PiperOrigin-RevId: 312559463
2020-05-18Merge release-20200511.0-253-g32ab382 (automated)gVisor bot
2020-05-18Improve unsupported syscall messageFabricio Voznika
PiperOrigin-RevId: 312104899
2020-05-16Merge release-20200511.0-251-g420b791 (automated)gVisor bot
2020-05-15Minor formatting updates for gvisor.dev.Adin Scannell
* Aggregate architecture Overview in "What is gVisor?" as it makes more sense in one place. * Drop "user-space kernel" and use "application kernel". The term "user-space kernel" is confusing when some platform implementation do not run in user-space (instead running in guest ring zero). * Clear up the relationship between the Platform page in the user guide and the Platform page in the architecture guide, and ensure they are cross-linked. * Restore the call-to-action quick start link in the main page, and drop the GitHub link (which also appears in the top-right). * Improve image formatting by centering all doc and blog images, and move the image captions to the alt text. PiperOrigin-RevId: 311845158
2020-05-14Merge release-20200422.0-300-g64afaf0 (automated)gVisor bot
2020-05-13Fix runsc association of gofers and FDs on VFS2.Jamie Liu
Updates #1487 PiperOrigin-RevId: 311443628
2020-05-13Merge release-20200422.0-297-gd846077 (automated)gVisor bot
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