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2020-08-14Merge release-20200810.0-28-gd6520e1d0 (automated)gVisor bot
2020-08-13[vfs2][gofer] Fix file creation flags sent to gofer.Ayush Ranjan
Fixes php runtime test ext/standard/tests/file/readfile_basic.phpt Fixes #3516 fsgofers only want the access mode in the OpenFlags passed to Create(). If more flags are supplied (like O_APPEND in this case), read/write from that fd will fail with EBADF. See runsc/fsgofer/fsgofer.go:WriteAt() VFS2 was providing more than just access modes. So filtering the flags using p9.OpenFlagsModeMask == linux.O_ACCMODE fixes the issue. Gofer in VFS1 also only extracts the access mode flags while making the create RPC. See pkg/sentry/fs/gofer/path.go:Create() Even in VFS2, when we open a handle, we extract out only the access mode flags + O_TRUNC. See third_party/gvisor/pkg/sentry/fsimpl/gofer/handle.go:openHandle() Added a test for this. PiperOrigin-RevId: 326574829
2020-08-14Merge release-20200810.0-27-gd3bb50ebf (automated)gVisor bot
2020-08-14Merge release-20200810.0-26-g20be1c0e6 (automated)gVisor bot
2020-08-14Merge release-20200810.0-24-g5036f135e (automated)gVisor bot
2020-08-13Merge release-20200810.0-23-g47515f475 (automated)gVisor bot
2020-08-13Merge release-20200810.0-21-g36134667b (automated)gVisor bot
2020-08-12Add reference leak checking to vfs2 tmpfs.inode.Dean Deng
Updates #1486. PiperOrigin-RevId: 326354750
2020-08-13Merge release-20200810.0-20-g42b610d56 (automated)gVisor bot
2020-08-12[vfs2][gofer] Return appropriate errors when opening and creating files.Ayush Ranjan
Fixes php test ext/standard/tests/file/touch_variation5.phpt on vfs2. Updates #3516 Also spotted a bug with O_EXCL, where we did not return EEXIST when we tried to open the root of the filesystem with O_EXCL | O_CREAT. Added some more tests for open() corner cases. PiperOrigin-RevId: 326346863
2020-08-12Merge release-20200810.0-16-ge6df6222a (automated)gVisor bot
2020-08-12Merge pull request #3250 from craig08:fuse-getattrgVisor bot
PiperOrigin-RevId: 326313858
2020-08-12Merge release-20200804.0-67-gd797f2666 (automated)gVisor bot
2020-08-12Redirect TODOFabricio Voznika
Fixes #2923 PiperOrigin-RevId: 326296589
2020-08-10Implement FUSE_GETATTRCraig Chi
FUSE_GETATTR is called when a stat(2), fstat(2), or lstat(2) is issued from VFS2 layer to a FUSE filesystem. Fixes #3175
2020-08-08Merge release-20200804.0-52-g3be26a271 (automated)gVisor bot
2020-08-07[vfs2] Fix tmpfs mounting.Ayush Ranjan
Earlier we were using NLink to decide if /tmp is empty or not. However, NLink at best tells us about the number of subdirectories (via the ".." entries). NLink = n + 2 for n subdirectories. But it does not tell us if the directory is empty. There still might be non-directory files. We could also not rely on NLink because host overlayfs always returned 1. VFS1 uses Readdir to decide if the directory is empty. Used a similar approach. We now use IterDirents to decide if the "/tmp" directory is empty. Fixes #3369 PiperOrigin-RevId: 325554234
2020-08-08Merge release-20200804.0-49-g343661770 (automated)gVisor bot
2020-08-07Don't hold gofer.filesystem.renameMu during dentry destruction.Jamie Liu
PiperOrigin-RevId: 325546629
2020-08-07Merge release-20200804.0-45-g0b7cd1e75 (automated)gVisor bot
2020-08-07Mark dropped pages unevictable in fsimpl/gofer.dentry.destroyLocked.Jamie Liu
PiperOrigin-RevId: 325531657
2020-08-07Merge release-20200804.0-39-g93cb66825 (automated)gVisor bot
2020-08-07Support separate read/write handles in fsimpl/gofer.dentry.Jamie Liu
PiperOrigin-RevId: 325490674
2020-08-07Merge release-20200804.0-36-g4fa1c304a (automated)gVisor bot
2020-08-07Try to update atime and mtime on VFS2 gofer files on dentry eviction.Jamie Liu
PiperOrigin-RevId: 325388385
2020-08-07Merge release-20200804.0-35-gf20e63e31 (automated)gVisor bot
2020-08-06Add LinkAt support to goferFabricio Voznika
Updates #1198 PiperOrigin-RevId: 325350818
2020-08-06Merge release-20200804.0-27-g35312a95c (automated)gVisor bot
2020-08-05Add loss recovery option for TCP.Nayana Bidari
/proc/sys/net/ipv4/tcp_recovery is used to enable RACK loss recovery in TCP. PiperOrigin-RevId: 325157807
2020-08-06Merge release-20200804.0-26-g7ed4b2b5a (automated)gVisor bot
2020-08-05Correctly decrement link counts in tmpfs rename operations.Dean Deng
When a directory is replaced by a rename operation, its link count should reach zero. We were missing the link from `dir/.` PiperOrigin-RevId: 325141730
2020-08-05Merge release-20200622.1-337-ga2e129b54 (automated)gVisor bot
2020-08-05Add missing case in tmpfs.inode.direntType.Dean Deng
This was discovered by syzkaller. PiperOrigin-RevId: 325025193
2020-08-05Merge release-20200622.1-334-g102735bfb (automated)gVisor bot
2020-08-04Inline gofer.regularFileFD.pwriteLockedFabricio Voznika
Go compiler barely inlines anything, so inline by hand pwriteLocked since it's called from a single place. PiperOrigin-RevId: 324937734
2020-08-05Merge release-20200622.1-333-gb44408b40 (automated)gVisor bot
2020-08-04Automated rollback of changelist 324906582Dean Deng
PiperOrigin-RevId: 324931854
2020-08-05Merge release-20200622.1-332-g338f96b36 (automated)gVisor bot
2020-08-04Merge release-20200622.1-329-g00993130e (automated)gVisor bot
2020-08-04Merge release-20200622.1-328-g0500f84b6 (automated)gVisor bot
2020-08-04Add reference counting utility to VFS2.Dean Deng
The utility has several differences from the VFS1 equivalent: - There are no weak references, which have a significant overhead - In order to print useful debug messages with the type of the reference- counted object, we use a generic Refs object with the owner type as a template parameter. In vfs1, this was accomplished by storing a type name and caller stack directly in the ref count (as in vfs1), which increases the struct size by 6x. (Note that the caller stack was needed because fs types like Dirent were shared by all fs implementations; in vfs2, each impl has its own data structures, so this is no longer necessary.) As an example, the utility is added to tmpfs.inode. Updates #1486. PiperOrigin-RevId: 324906582
2020-08-04Internal change.gVisor bot
PiperOrigin-RevId: 324826968
2020-08-04Merge release-20200622.1-316-gad7c9fc4c (automated)gVisor bot
2020-08-03[vfs2] Implement /sys/devices/system/cpu/cpuX.Ayush Ranjan
Fixes #3364 PiperOrigin-RevId: 324724614
2020-08-03Merge release-20200622.1-313-gb2ae7ea1b (automated)gVisor bot
2020-08-03Plumbing context.Context to DecRef() and Release().Nayana Bidari
context is passed to DecRef() and Release() which is needed for SO_LINGER implementation. PiperOrigin-RevId: 324672584
2020-07-31Merge release-20200622.1-300-ga7d9aa6d5 (automated)gVisor bot
2020-07-30Merge pull request #3179 from jinmouil:fuse_initgVisor bot
PiperOrigin-RevId: 324100220
2020-07-29Add FUSE_INITJinmou Li
This change allows the sentry to send FUSE_INIT request and process the reply. It adds the corresponding structs, employs the fuse device to send and read the message, and stores the results of negotiation in corresponding places (inside connection struct). It adds a CallAsync() function to the FUSE connection interface: - like Call(), but it's for requests that do not expect immediate response (init, release, interrupt etc.) - will block if the connection hasn't initialized, which is the same for Call()
2020-07-27Merge release-20200622.1-236-g112eb0c5b (automated)gVisor bot
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