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2019-08-27Mount volumes as super userFabricio Voznika
This used to be the case, but regressed after a recent change. Also made a few fixes around it and clean up the code a bit. Closes #720 PiperOrigin-RevId: 265717496
2019-08-14Replace uinptr with int64 when returning lengthsTamir Duberstein
This is in accordance with newer parts of the standard library. PiperOrigin-RevId: 263449916
2019-08-13Fix file mode check in pipeOperationsFabricio Voznika
PiperOrigin-RevId: 263203441
2019-08-09ext: Move to pkg/sentry/fsimpl.Ayush Ranjan
fsimpl is the keeper of all filesystem implementations in VFS2. PiperOrigin-RevId: 262617869
2019-08-08ext: Benchmark tests.Ayush Ranjan
Added benchmark tests which emulate memfs benchmarks. Stat benchmarks BenchmarkVFS2Ext4fsStat/1-12 10000000 145 ns/op BenchmarkVFS2Ext4fsStat/2-12 10000000 170 ns/op BenchmarkVFS2Ext4fsStat/3-12 10000000 202 ns/op BenchmarkVFS2Ext4fsStat/8-12 3000000 374 ns/op BenchmarkVFS2Ext4fsStat/64-12 500000 2159 ns/op BenchmarkVFS2Ext4fsStat/100-12 300000 3459 ns/op BenchmarkVFS1TmpfsStat/1-12 5000000 348 ns/op BenchmarkVFS1TmpfsStat/2-12 3000000 487 ns/op BenchmarkVFS1TmpfsStat/3-12 2000000 655 ns/op BenchmarkVFS1TmpfsStat/8-12 1000000 1365 ns/op BenchmarkVFS1TmpfsStat/64-12 200000 9565 ns/op BenchmarkVFS1TmpfsStat/100-12 100000 15158 ns/op BenchmarkVFS2MemfsStat/1-12 10000000 133 ns/op BenchmarkVFS2MemfsStat/2-12 10000000 155 ns/op BenchmarkVFS2MemfsStat/3-12 10000000 182 ns/op BenchmarkVFS2MemfsStat/8-12 5000000 310 ns/op BenchmarkVFS2MemfsStat/64-12 1000000 1659 ns/op BenchmarkVFS2MemfsStat/100-12 500000 2787 ns/op Mount Stat benchmarks BenchmarkVFS2ExtfsMountStat/1-12 5000000 245 ns/op BenchmarkVFS2ExtfsMountStat/2-12 5000000 266 ns/op BenchmarkVFS2ExtfsMountStat/3-12 5000000 304 ns/op BenchmarkVFS2ExtfsMountStat/8-12 3000000 456 ns/op BenchmarkVFS2ExtfsMountStat/64-12 500000 2308 ns/op BenchmarkVFS2ExtfsMountStat/100-12 300000 3482 ns/op BenchmarkVFS1TmpfsMountStat/1-12 3000000 488 ns/op BenchmarkVFS1TmpfsMountStat/2-12 2000000 658 ns/op BenchmarkVFS1TmpfsMountStat/3-12 2000000 806 ns/op BenchmarkVFS1TmpfsMountStat/8-12 1000000 1514 ns/op BenchmarkVFS1TmpfsMountStat/64-12 100000 10037 ns/op BenchmarkVFS1TmpfsMountStat/100-12 100000 15280 ns/op BenchmarkVFS2MemfsMountStat/1-12 10000000 212 ns/op BenchmarkVFS2MemfsMountStat/2-12 5000000 232 ns/op BenchmarkVFS2MemfsMountStat/3-12 5000000 264 ns/op BenchmarkVFS2MemfsMountStat/8-12 3000000 390 ns/op BenchmarkVFS2MemfsMountStat/64-12 1000000 1813 ns/op BenchmarkVFS2MemfsMountStat/100-12 500000 2812 ns/op PiperOrigin-RevId: 262477158
2019-08-08Return a well-defined socket address type from socket funtions.Rahat Mahmood
Previously we were representing socket addresses as an interface{}, which allowed any type which could be binary.Marshal()ed to be used as a socket address. This is fine when the address is passed to userspace via the linux ABI, but is problematic when used from within the sentry such as by networking procfs files. PiperOrigin-RevId: 262460640
2019-08-07ext: Seek unit tests.Ayush Ranjan
PiperOrigin-RevId: 262264674
2019-08-07ext: StatAt unit tests.Ayush Ranjan
PiperOrigin-RevId: 262249166
2019-08-07ext: Read unit tests.Ayush Ranjan
PiperOrigin-RevId: 262242410
2019-08-07ext: IterDirent unit tests.Ayush Ranjan
PiperOrigin-RevId: 262226761
2019-08-07ext: vfs.FileDescriptionImpl and vfs.FilesystemImpl implementations.Ayush Ranjan
- This also gets rid of pipes for now because pipe does not have vfs2 specific support yet. - Added file path resolution logic. - Fixes testing infrastructure. - Does not include unit tests yet. PiperOrigin-RevId: 262213950
2019-08-02Job control: controlling TTYs and foreground process groups.Kevin Krakauer
(Don't worry, this is mostly tests.) Implemented the following ioctls: - TIOCSCTTY - set controlling TTY - TIOCNOTTY - remove controlling tty, maybe signal some other processes - TIOCGPGRP - get foreground process group. Also enables tcgetpgrp(). - TIOCSPGRP - set foreground process group. Also enabled tcsetpgrp(). Next steps are to actually turn terminal-generated control characters (e.g. C^c) into signals to the proper process groups, and to send SIGTTOU and SIGTTIN when appropriate. PiperOrigin-RevId: 261387276
2019-08-02Remove kernel.mounts.Nicolas Lacasse
We can get the mount namespace from the CreateProcessArgs in all cases where we need it. This also gets rid of kernel.Destroy method, since the only thing it was doing was DecRefing the mounts. Removing the need to call kernel.SetRootMountNamespace also allowed for some more simplifications in the container fs setup code. PiperOrigin-RevId: 261357060
2019-08-01tmpfs and ramfs Dirs should drop references on children in Release().Nicolas Lacasse
This is the source of many warnings like: AtomicRefCount 0x7f5ff84e3500 owned by "fs.Inode" garbage collected with ref count of 1 (want 0) PiperOrigin-RevId: 261197093
2019-07-30Cache pages in CachingInodeOperations.Read when memory evictions are delayed.Jamie Liu
PiperOrigin-RevId: 260851452
2019-07-30ext: Migrate from using fileReader custom interface to using io.Reader.Ayush Ranjan
It gets rid of holding state of the io.Reader offset (which is anyways held by the vfs.FileDescriptor struct. It is also odd using a io.Reader becuase we using io.ReaderAt to interact with the device. So making a io.ReaderAt wrapper makes more sense. Most importantly, it gets rid of the complexity of extracting the file reader from a regular file implementation and then using it. Now we can just use the regular file implementation as a reader which is more intuitive. PiperOrigin-RevId: 260846927
2019-07-30ext: block map file reader implementation.Ayush Ranjan
Also adds stress tests for block map reader and intensifies extent reader tests. PiperOrigin-RevId: 260838177
2019-07-30Add feature to launch Sentry from an open host FD.Zach Koopmans
Adds feature to launch from an open host FD instead of a binary_path. The FD should point to a valid executable and most likely be statically compiled. If the executable is not statically compiled, the loader will search along the interpreter paths, which must be able to be resolved in the Sandbox's file system or start will fail. PiperOrigin-RevId: 260756825
2019-07-29Migrate from using io.ReadSeeker to io.ReaderAt.Ayush Ranjan
This provides the following benefits: - We can now use pkg/fd package which does not take ownership of the file descriptor. So it does not close the fd when garbage collected. This reduces scope of errors from unexpected garbage collection of io.File. - It enforces the offset parameter in every read call. It does not affect the fd offset nor is it affected by it. Hence reducing scope of error of using stale offsets when reading. - We do not need to serialize the usage of any global file descriptor anymore. So this drops the mutual exclusion req hence reducing complexity and congestion. PiperOrigin-RevId: 260635174
2019-07-29ext: extent reader implementation.Ayush Ranjan
PiperOrigin-RevId: 260629559
2019-07-29ext: inode implementations.Ayush Ranjan
PiperOrigin-RevId: 260624470
2019-07-25Automated rollback of changelist 255679453Fabricio Voznika
PiperOrigin-RevId: 260047477
2019-07-24ext: filesystem boilerplate code.Ayush Ranjan
PiperOrigin-RevId: 259865366
2019-07-24ext: Add tests for root directory inode.Ayush Ranjan
PiperOrigin-RevId: 259856442
2019-07-24ext: testing environment setup with VFS2 support.Ayush Ranjan
PiperOrigin-RevId: 259835948
2019-07-23ext: Inode creation logic.Ayush Ranjan
PiperOrigin-RevId: 259666476
2019-07-23ext: Add ext2 and ext3 tiny images.Ayush Ranjan
PiperOrigin-RevId: 259657917
2019-07-23ext: Added extent tree building logic.Ayush Ranjan
PiperOrigin-RevId: 259628657
2019-07-17Take copyMu in RevalidateMichael Pratt
copyMu is required to read child.overlay.upper. PiperOrigin-RevId: 258662209
2019-07-17Separate O_DSYNC and O_SYNC.Jamie Liu
PiperOrigin-RevId: 258657913
2019-07-17ext: disklayout: extents support.Ayush Ranjan
PiperOrigin-RevId: 258657776
2019-07-17ext: Filesystem init implementation.Ayush Ranjan
PiperOrigin-RevId: 258645957
2019-07-17Merge pull request #533 from kevinGC:stub-dev-ttygVisor bot
PiperOrigin-RevId: 258607547
2019-07-17Properly invalidate cache in rename and removeMichael Pratt
We were invalidating the wrong overlayEntry in rename and missing invalidation in rename and remove if lower exists. PiperOrigin-RevId: 258604685
2019-07-16Merge pull request #474 from zhuangel:proctasksgVisor bot
PiperOrigin-RevId: 258479216
2019-07-15Support /proc/net/devJianfeng Tan
This proc file reports the stats of interfaces. We could use ifconfig command to check the result. Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com> Change-Id: Ia7c1e637f5c76c30791ffda68ee61e861b6ef827 COPYBARA_INTEGRATE_REVIEW=https://gvisor-review.googlesource.com/c/gvisor/+/18282/ PiperOrigin-RevId: 258303936
2019-07-12Merge pull request #282 from zhangningdlut:chris_test_procgVisor bot
PiperOrigin-RevId: 257855479
2019-07-11Fix license year and remove Read.Kevin
2019-07-11Add a stub for /dev/tty.Kevin
Actual implementation to follow, but this will satisfy applications that want it to just exist.
2019-07-11Added tiny ext4 image.Ayush Ranjan
The image is of size 64Kb which supports 64 1k blocks and 16 inodes. This is the smallest size mkfs.ext4 works with. Added README.md documenting how this was created and included all files on the device under assets. PiperOrigin-RevId: 257712672
2019-07-11ext: boilerplate code.Ayush Ranjan
Renamed ext4 to ext since we are targeting ext(2/3/4). Removed fs.go since we are targeting VFS2. Added ext.go with filesystem struct. PiperOrigin-RevId: 257689775
2019-07-09ext4: disklayout: Directory Entry implementation.Ayush Ranjan
PiperOrigin-RevId: 257314911
2019-07-08Don't try to execute a file that is not regular.Nicolas Lacasse
PiperOrigin-RevId: 257037608
2019-07-08ext4: disklayout: inode impl.Ayush Ranjan
PiperOrigin-RevId: 257010414
2019-07-02Remove map from fd_map, change to fd_table.Adin Scannell
This renames FDMap to FDTable and drops the kernel.FD type, which had an entire package to itself and didn't serve much use (it was freely cast between types, and served as more of an annoyance than providing any protection.) Based on BenchmarkFDLookupAndDecRef-12, we can expect 5-10 ns per lookup operation, and 10-15 ns per concurrent lookup operation of savings. This also fixes two tangential usage issues with the FDMap. Namely, non-atomic use of NewFDFrom and associated calls to Remove (that are both racy and fail to drop the reference on the underlying file.) PiperOrigin-RevId: 256285890
2019-07-02Ext4: DiskLayout: Inode interface.Ayush Ranjan
PiperOrigin-RevId: 256234390
2019-06-28Add finalizer on AtomicRefCount to check for leaks.Ian Gudger
PiperOrigin-RevId: 255711454
2019-06-28Drop ashmem and binder.Adin Scannell
These are unfortunately unused and unmaintained. They can be brought back in the future if need requires it. PiperOrigin-RevId: 255697132
2019-06-28ext4: disklayout: SuperBlock interface implementations.Ayush Ranjan
PiperOrigin-RevId: 255687771
2019-06-28Automated rollback of changelist 255263686Nicolas Lacasse
PiperOrigin-RevId: 255679453
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