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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
2020-09-16Implement FUSE_WRITEJinmou Li
This commit adds basic write(2) support for FUSE.
2020-09-16Implement FUSE_CREATECraig Chi
FUSE_CREATE is called when issuing creat(2) or open(2) with O_CREAT. It creates a new file on the FUSE filesystem. Fixes #3825
2020-09-16FUSE device: clean up readLockedJinmou Li
This change removes the unnecessary loop and avoids the recursive call. It also fixes minor bugs in this function.
2020-09-16Downgrade FUSE minor version support and clarify commentsJinmou Li
2020-09-16fuse: remove unused marshalling functionsCraig Chi
This commit removes unused marshalling functions in linux abi package and moves self-defined FUSEInitRes wrapper to fuse package. Updates #3707
2020-09-16Support multiple FUSE kernel versions of FUSE_INIT response structCraig Chi
The fuse_init_out struct changes in different FUSE kernel versions. A FUSE server may implement older versions of fuse_init_out, but they share common attributes from the beginning. Implement variable-length marshallable interface to support older versions of ABI. Fixes #3707
2020-09-16Implementing inode.GetlinkCraig Chi
kernfs uses inode.Getlink to resolve symlink when look up paths. Updates #3452
2020-09-16Fix FUSE_READDIR offset issueCraig Chi
According to readdir(3), the offset attribute in struct dirent is the offset to the next dirent instead of the offset of itself. Send the successive FUSE_READDIR requests with the offset retrieved from the last entry. Updates #3255
2020-09-16fuse: use safe go_marshal API for FUSERidwan Sharif
Until #3698 is resolved, this change is needed to ensure we're not corrupting memory anywhere.
2020-09-16fuse: Implement IterDirents for directory file descriptionRidwan Sharif
Fixes #3255. This change adds support for IterDirents. You can now use `ls` in the FUSE sandbox. Co-authored-by: Craig Chi <craigchi@google.com>
2020-09-16Implement FUSE_RMDIRRidwan Sharif
Fixes #3587 Co-authored-by: Craig Chi <craigchi@google.com>
2020-09-16Implement FUSE_READJinmou Li
Fixes #3206
2020-09-16Implement FUSE_MKDIRBoyuan He
Fixes #3392
2020-09-16Implement FUSE_READLINKBoyuan He
Fixes #3316
2020-09-16Implement FUSE_SYMLINKBoyuan He
Fixes #3452
2020-09-16Implement FUSE_MKNODBoyuan He
Fixes #3492
2020-09-16Implement FUSE_RELEASE/RELEASEDIRBoyuan He
Fixes #3314
2020-09-16Implement FUSE_OPEN/OPENDIRBoyuan He
Fixes #3174
2020-09-16Implement FUSE_LOOKUPAndrei Vagin
Fixes #3231 Co-authored-by: Boyuan He <heboyuan@google.com>
2020-09-16Extend integration test to test sequence of FUSE operationCraig Chi
Original FUSE integration test has limited capabilities. To test more situations, the new integration test framework introduces a protocol to communicate between testing thread and the FUSE server. In summary, this change includes: 1. Remove CompareResult() and break SetExpected() into SetServerResponse() and GetServerActualRequest(). We no longer set up an expected request because we want to retrieve the actual FUSE request made to the FUSE server and check in the testing thread. 2. Declare a serial buffer data structure to save the received requests and expected responses sequentially. The data structure contains a cursor to indicate the progress of accessing. This change makes sequential SetServerResponse() and GetServerActualRequest() possible. 3. Replace 2 single directional pipes with 1 bi-directional socketpair. A protocol which starts with FuseTestCmd is used between the testing thread and the FUSE server to provide various functionality. Fixes #3405
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