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2020-09-11Improve 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.
2020-09-11Refactor 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.
2020-09-11Implement 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
2020-09-11Add 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
2020-09-11Implement FUSE_WRITEJinmou Li
This commit adds basic write(2) support for FUSE.
2020-09-11Implement 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
2020-09-11FUSE device: clean up readLockedjinmouil
This change removes the unnecessary loop and avoids the recursive call. It also fixes minor bugs in this function.
2020-09-11Downgrade FUSE minor version support and clarify commentsjinmouil
2020-09-11fuse: 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
2020-09-11fuse: add benchmarking support for FUSEBoyuan He & Ridwan Sharif
This change adds the following: - Add support for containerizing syscall tests for FUSE - Mount tmpfs in the container so we can run benchmarks against it - Run the server in a background process - benchmarks for fuse syscall Co-authored-by: Ridwan Sharif <ridwanmsharif@google.com>
2020-09-11Support 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
2020-09-11Implementing inode.GetlinkCraig Chi
kernfs uses inode.Getlink to resolve symlink when look up paths. Updates #3452
2020-09-11Fix 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
2020-09-11fuse: use safe go_marshal API for FUSERidwan Sharif
Until #3698 is resolved, this change is needed to ensure we're not corrupting memory anywhere.
2020-09-11fuse: 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>
2020-09-11Implement FUSE_RMDIRRidwan Sharif
Fixes #3587 Co-authored-by: Craig Chi <craigchi@google.com>
2020-09-11Implement FUSE_READJinmou Li
Fixes #3206
2020-09-11Implement FUSE_MKDIRBoyuan He
Fixes #3392
2020-09-11Implement FUSE_READLINKBoyuan He
Fixes #3316
2020-09-11Implement FUSE_SYMLINKBoyuan He
Fixes #3452
2020-09-11Implement FUSE_MKNODBoyuan He
Fixes #3492
2020-09-11Implement FUSE_RELEASE/RELEASEDIRBoyuan He
Fixes #3314
2020-09-11Implement FUSE_OPEN/OPENDIRBoyuan He
Fixes #3174
2020-09-11Implement FUSE_LOOKUPAndrei Vagin
Fixes #3231 Co-authored-by: Boyuan He <heboyuan@google.com>
2020-09-11Extend 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
2020-09-09Don't sched_setaffinity in ptrace platform.Jamie Liu
PiperOrigin-RevId: 330777900
2020-09-09Implement synthetic mountpoints for kernfs.Jamie Liu
PiperOrigin-RevId: 330629897
2020-09-09[vfs] overlayfs: Fix socket tests.Ayush Ranjan
- BindSocketThenOpen test was expecting the incorrect error when opening a socket. Fixed that. - VirtualFilesystem.BindEndpointAt should not require pop.Path.Begin.Ok() because the filesystem implementations do not need to walk to the parent dentry. This check also exists for MknodAt, MkdirAt, RmdirAt, SymlinkAt and UnlinkAt but those filesystem implementations also need to walk to the parent denty. So that check is valid. Added some syscall tests to test this. PiperOrigin-RevId: 330625220
2020-09-09Add check for both child and childMerkle ENOENTgVisor bot
The check in verity walk returns error for non ENOENT cases, and all ENOENT results should be checked. This case was missing. PiperOrigin-RevId: 330604771
2020-09-09Implement ioctl with enable veritygVisor bot
ioctl with FS_IOC_ENABLE_VERITY is added to verity file system to enable a file as verity file. For a file, a Merkle tree is built with its data. For a directory, a Merkle tree is built with the root hashes of its children. PiperOrigin-RevId: 330604368
2020-09-09[vfs] overlayfs: decref VD when not using it.Ayush Ranjan
overlay/filesystem.go:lookupLocked() did not DecRef the VD on some error paths when it would not end up saving or using the VD. PiperOrigin-RevId: 330589742
2020-09-09Honor readonly flag for root mountFabricio Voznika
Updates #1487 PiperOrigin-RevId: 330580699
2020-09-09Fix the use after nil check on args.MountNamespaceVFS2Tiwei Bie
The args.MountNamespaceVFS2 is used again after the nil check, instead, mntnsVFS2 which holds the expected reference should be used. This patch fixes this issue. Fixes: #3855 Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
2020-09-09Improve type safety for transport protocol optionsGhanan Gowripalan
The existing implementation for TransportProtocol.{Set}Option take arguments of an empty interface type which all types (implicitly) implement; any type may be passed to the functions. This change introduces marker interfaces for transport protocol options that may be set or queried which transport protocol option types implement to ensure that invalid types are caught at compile time. Different interfaces are used to allow the compiler to enforce read-only or set-only socket options. RELNOTES: n/a PiperOrigin-RevId: 330559811
2020-09-09[vfs] Capitalize x in the {Get/Set/Remove/List}xattr functions.Ayush Ranjan
PiperOrigin-RevId: 330554450
2020-09-09Simplify FD handling for container start/execFabricio Voznika
VFS1 and VFS2 host FDs have different dupping behavior, making error prone to code for both. Change the contract so that FDs are released as they are used, so the caller can simple defer a block that closes all remaining files. This also addresses handling of partial failures. With this fix, more VFS2 tests can be enabled. Updates #1487 PiperOrigin-RevId: 330112266
2020-09-09Adjust input file offset when sendfile only completes a partial write.Dean Deng
Fixes #3779. PiperOrigin-RevId: 330057268
2020-09-09Fix Accept to not return error for sockets in accept queue.Bhasker Hariharan
Accept on gVisor will return an error if a socket in the accept queue was closed before Accept() was called. Linux will return the new fd even if the returned socket is already closed by the peer say due to a RST being sent by the peer. This seems to be intentional in linux more details on the github issue. Fixes #3780 PiperOrigin-RevId: 329828404
2020-09-09[vfs] Implement xattr for overlayfs.Ayush Ranjan
PiperOrigin-RevId: 329825497
2020-09-09[vfs] Fix error handling in overlayfs OpenAt.Ayush Ranjan
Updates #1199 PiperOrigin-RevId: 329802274
2020-09-09Implement setattr+clunk in 9PFabricio Voznika
This is to cover the common pattern: open->read/write->close, where SetAttr needs to be called to update atime/mtime before the file is closed. Benchmark results: BM_OpenReadClose/10240 CPU setattr+clunk: 63783 ns VFS2: 68109 ns VFS1: 72507 ns Updates #1198 PiperOrigin-RevId: 329628461
2020-09-09Refactor tty codebase to use master-replica terminology.Ayush Ranjan
Updates #2972 PiperOrigin-RevId: 329584905
2020-09-09Fix panic when calling dup2().Nayana Bidari
PiperOrigin-RevId: 329572337
2020-09-09[go-marshal] Enable auto-marshalling for fs/tty.Ayush Ranjan
PiperOrigin-RevId: 329564614
2020-09-09Automated rollback of changelist 328350576Nayana Bidari
PiperOrigin-RevId: 329526153
2020-09-09Don't use read-only host FD for writable gofer dentries in VFS2.Jamie Liu
As documented for gofer.dentry.hostFD. PiperOrigin-RevId: 329372319
2020-09-09Implement walk in gvisor verity fsgVisor bot
Implement walk directories in gvisor verity file system. For each step, the child dentry is verified against a verified parent root hash. PiperOrigin-RevId: 329358747
2020-09-09Fix kernfs.Dentry reference leak.Nicolas Lacasse
PiperOrigin-RevId: 329036994
2020-09-09Implement StatFS for various VFS2 filesystems.Rahat Mahmood
This mainly involved enabling kernfs' client filesystems to provide a StatFS implementation. Fixes #3411, #3515. PiperOrigin-RevId: 329009864
2020-09-09Fix EOF handling for splice.Dean Deng
Also, add corresponding EOF tests for splice/sendfile. Discovered by syzkaller. PiperOrigin-RevId: 328975990
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