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2020-10-03Fix kcov enabling and disabling procedures.Dean Deng
- When the KCOV_ENABLE_TRACE ioctl is called with the trace kind KCOV_TRACE_PC, the kcov mode should be set to KCOV_*MODE*_TRACE_PC. - When the owning task of kcov exits, the memory mapping should not be cleared so it can be used by other tasks. - Add more tests (also tested on native Linux kcov). PiperOrigin-RevId: 335202585
2020-10-02Convert uses of the binary package in kernel to go-marshal.Rahat Mahmood
PiperOrigin-RevId: 335077195
2020-10-01Add a verity test for modified parent Merkle fileChong Cai
When a child's root hash or its Merkle path is modified in its parent's Merkle tree file, opening the file should fail, provided the directory is verity enabled. The test for this behavior is added. PiperOrigin-RevId: 334963690
2020-09-30Merge pull request #3824 from btw616:fix/issue-3823gVisor bot
PiperOrigin-RevId: 334721453
2020-09-30Implement ioctl with measure in verity fsChong Cai
PiperOrigin-RevId: 334682753
2020-09-30Internal change.Chong Cai
PiperOrigin-RevId: 334678513
2020-09-30[go-marshal] Port ext codebase to use go marshal.Ayush Ranjan
PiperOrigin-RevId: 334656292
2020-09-30Add verity fs testsChong Cai
The tests confirms that when a file is opened in verity, the corresponding Merkle trees are generated. Also a normal read succeeds on verity enabled files, but fails if either the verity file or the Merkle tree file is modified. PiperOrigin-RevId: 334640331
2020-09-29Add /proc/[pid]/cwdFabricio Voznika
PiperOrigin-RevId: 334478850
2020-09-28Support inotify in overlayfs.Dean Deng
Fixes #1479, #317. PiperOrigin-RevId: 334258052
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
2020-09-24[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
2020-09-24[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
2020-09-24Add basic stateify annotations.Adin Scannell
Updates #1663 PiperOrigin-RevId: 333539293
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
2020-09-23[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
2020-09-23Set verity underlying fs mount as internalChong Cai
PiperOrigin-RevId: 333404727
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
2020-09-21Allow 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
2020-09-21Use kernfs.Dentry for kernfs.Lookup.Dean Deng
Updates #1193. PiperOrigin-RevId: 332939026
2020-09-20Merge pull request #3651 from ianlewis:ip-forwardinggVisor bot
PiperOrigin-RevId: 332760843
2020-09-18Implement fsimpl/overlay.filesystem.RenameAt.Jamie Liu
Updates #1199 PiperOrigin-RevId: 332539197
2020-09-18Use a tmpfs file for shared anonymous and /dev/zero mmap on VFS2.Jamie Liu
This is more consistent with Linux (see comment on MM.NewSharedAnonMappable()). We don't do the same thing on VFS1 for reasons documented by the updated comment. PiperOrigin-RevId: 332514849
2020-09-18Merge pull request #3972 from btw616:fix/commentsgVisor bot
PiperOrigin-RevId: 332486111
2020-09-17fuse.DeviceFD needs to hold a reference on the associated filesystem.Rahat Mahmood
This fixes a use-after-free in fuse.DeviceFD.Release. PiperOrigin-RevId: 332394146
2020-09-17Change sizeofInt32 to string sizeChong Cai
This constant is used to represent int32 stored in file xattrs. The integers are stored as strings there, so the real size should be the string size (number of digits) instead of an int size (4 bytes). PiperOrigin-RevId: 332353217
2020-09-17Set mode when creating Merkle tree fileChong Cai
PiperOrigin-RevId: 332340342
2020-09-17Complete vfs2 implementation of fallocate.Dean Deng
This change includes overlay, special regular gofer files, and hostfs. Fixes #3589. PiperOrigin-RevId: 332330860
2020-09-17Fix kernfs unlinkat and rmdirat incorrect resolved path nameJinmou Li
2020-09-17fsimpl: improve the "implements" commentsTiwei Bie
As noticed by @ayushr2, the "implements" comments are not consistent, e.g. // IterDirents implements kernfs.inodeDynamicLookup. // Generate implements vfs.DynamicBytesSource.Generate. This patch improves this by making the comments like this consistently include the package name (when the interface and struct are not in the same package) and method name. Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
2020-09-16Merge pull request #3934 from avagin:feature/fusegVisor bot
PiperOrigin-RevId: 332122081
2020-09-16Implement OpenAt() for verity fsChong Cai
OpenAt() for verity fs is implemented by opening both the target file or directory and the corresponding Merkle tree file in the underlying file system. Generally they are only open for read. In allowRuntimeEnable mode, the Merkle tree file is also open for write. PiperOrigin-RevId: 332116423
2020-09-16Implement PRead for verity fsChong Cai
PRead is implemented by read from the underlying file in blocks, and verify each block. The verified contents are saved into the output buffer. PiperOrigin-RevId: 332092267
2020-09-16fuse: fix data race in fusefs Release()Jinmou Li
fix #3956
2020-09-16fuse: fix FUSE_RELEASE reply handlingJinmou Li
fix #3963
2020-09-16Fix FUSE connection control lock ordering and race in unit testJinmou Li
2020-09-16fuse: don't pass lock by valueAndrei Vagin
copylocks: directory.go:34:7: Allocate passes lock by value: fuse/fuse.directoryFD contains fuse/fuse.fileDescription contains pkg/sentry/vfs/vfs.FileDescription contains pkg/sync/sync.Mutex
2020-09-16Fix FUSE unit test after vfs interface changeJinmou Li
2020-09-16Fix FUSE go unit test merge conflict mistakeJinmou Li
2020-09-16fs/fuse: Move the 'marshal' and 'primitive' packages to the 'pkg' directory.Andrei Vagin
2020-09-16Unexport fusefs.inode.nodeIDCraig Chi
2020-09-16Implement FUSE_UNLINKBoyuan He
Fixes #3696
2020-09-16Fix comments of TODO issues.Craig Chi
2020-09-16Add FUSE umount supportJinmou Li
This change implements Release for the FUSE filesystem and expected behaviors of the FUSE devices. It includes several checks for aborted connection in the path for making a request and a function to abort all the ongoing FUSE requests in order.
2020-09-16Fix FUSE_RELEASE protocol reply processingJinmou Li
This commit fixes the potential unexpected errors of original handling of FUSE_RELEASE responses while keep the same behavior (ignoring any reply).
2020-09-16Improve FUSE async/noreply call logicJinmou Li
This change adds bookkeeping variables for the FUSE request. With them, old insecure confusing code we used to process async requests is replaced by new clear compiling ones. Future code can take advantage of them to have better control of each requests.
2020-09-16Refactor FUSE connection for readability and structureJinmou Li
This change decouples the code that is weakly tied to the connection struct from connection.go, rename variables and files with more meaningful choices, adds detailed comments, explains lock orders, and adds other minor improvement to make the existing FUSE code more readable and more organized. Purpose is to avoid too much code in one file and provide better structure for the future commits.
2020-09-16Implement FUSE_SETATTRCraig Chi
This commit implements FUSE_SETATTR command. When a system call modifies the metadata of a regular file or a folder by chown(2), chmod(2), truncate(2), utime(2), or utimes(2), they should be translated to corresponding FUSE_SETATTR command and sent to the FUSE server. Fixes #3332
2020-09-16Add fh support for revise attr and fstat(2) testCraig Chi
According to Linux 4.4's FUSE behavior, the flags and fh attributes in FUSE_GETATTR are only used in read, write, and lseek. fstat(2) doesn't use them either. Add tests to ensure the requests sent from FUSE module are consistent with Linux's. Updates #3655
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