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2020-07-02Merge release-20200622.1-56-g3b26d2121 (automated)gVisor bot
2020-07-01Remove maxSendBufferSize from vfs2.Dean Deng
Complements cl/315991648. PiperOrigin-RevId: 319327853
2020-07-02Merge release-20200622.1-55-g65d998555 (automated)gVisor bot
2020-07-01Port vfs1 implementation of sync_file_range to vfs2.Dean Deng
Currently, we always perform a full-file sync which could be extremely expensive for some applications. Although vfs1 did not fully support sync_file_range, there were some optimizations that allowed us skip some unnecessary write-outs. Updates #2923, #1897. PiperOrigin-RevId: 319324213
2020-07-01Merge release-20200622.1-52-g6a90c88b9 (automated)gVisor bot
2020-07-01Port fallocate to VFS2.Zach Koopmans
PiperOrigin-RevId: 319283715
2020-07-01Merge release-20200622.1-46-g43f5dd95a (automated)gVisor bot
2020-06-30Fix index calculation for /proc/[pid]/cmdline.Dean Deng
We were truncating buf using a index relative to the middle of the slice (i.e. where envv begins), but we need to calculate the index relative to the entire slice. Updates #2923. PiperOrigin-RevId: 319154950
2020-07-01Merge release-20200622.1-45-g20d571b0c (automated)gVisor bot
2020-06-30Allow O_DIRECT on vfs2 tmpfs files.Dean Deng
Updates #2923. PiperOrigin-RevId: 319153792
2020-07-01Merge release-20200622.1-44-gc4bdd0118 (automated)gVisor bot
2020-06-30Add missing newline in /sys/devices/systen/cpu/onineBhasker Hariharan
PiperOrigin-RevId: 319143410
2020-06-27Merge release-20200622.1-38-g02d552d07 (automated)gVisor bot
2020-06-27Support sticky bit in vfs2.Dean Deng
Updates #2923. PiperOrigin-RevId: 318648128
2020-06-26Merge release-20200622.1-29-g54a31e219 (automated)gVisor bot
2020-06-26Support inotify IN_ONESHOT.Dean Deng
Also, while we're here, make sure that gofer inotify events are generated when files are created in remote revalidating mode. Updates #1479. PiperOrigin-RevId: 318536354
2020-06-26Merge release-20200622.1-28-gcfd049da8 (automated)gVisor bot
2020-06-25Moved FUSE device under the fuse directoryRidwan Sharif
2020-06-25Merge release-20200608.0-124-gb5e814445 (automated)gVisor bot
2020-06-24Fix procfs bugs in vfs2.Dean Deng
- Support writing on proc/[pid]/{uid,gid}map - Return EIO for writing to static files. Updates #2923. PiperOrigin-RevId: 318188503
2020-06-24Merge release-20200608.0-122-g58880bf55 (automated)gVisor bot
2020-06-24Port /dev/net/tun device to VFS2.Nicolas Lacasse
Updates #2912 #1035 PiperOrigin-RevId: 318162565
2020-06-24Merge release-20200608.0-119-g364ac92ba (automated)gVisor bot
2020-06-24Merge release-20200608.0-118-g399c52888 (automated)gVisor bot
2020-06-23Resolve remaining inotify TODOs.Dean Deng
Also refactor HandleDeletion(). Updates #1479. PiperOrigin-RevId: 317989000
2020-06-24Merge release-20200608.0-117-g2189e0a66 (automated)gVisor bot
2020-06-23Clean up hostfs TODOs.Dean Deng
This CL does a handful of things: - Support O_DSYNC, O_SYNC - Support O_APPEND and document an unavoidable race condition - Ignore O_DIRECT; we probably don't want to allow applications to set O_DIRECT on the host fd itself. - Leave a TODO for supporting O_NONBLOCK, which is a simple fix once RWF_NOWAIT is supported. - Get rid of caching TODO; force_page_cache is not configurable for host fs in vfs1 or vfs2 after whitelist fs was removed. - For the remaining TODOs, link to more specific bugs. Fixes #1672. PiperOrigin-RevId: 317985269
2020-06-24Merge release-20200608.0-114-g65a587ded (automated)gVisor bot
2020-06-23Complete inotify IN_EXCL_UNLINK implementation in VFS2.Dean Deng
Events were only skipped on parent directories after their children were unlinked; events on the unlinked file itself need to be skipped as well. As a result, all Watches.Notify() calls need to know whether the dentry where the call came from was unlinked. Updates #1479. PiperOrigin-RevId: 317979476
2020-06-23Merge release-20200608.0-112-g0c628c315 (automated)gVisor bot
2020-06-23Support inotify in vfs2 gofer fs.Dean Deng
Because there is no inode structure stored in the sandbox, inotify watches must be held on the dentry. This would be an issue in the presence of hard links, where multiple dentries would need to share the same set of watches, but in VFS2, we do not support the internal creation of hard links on gofer fs. As a result, we make the assumption that every dentry corresponds to a unique inode. Furthermore, dentries can be cached and then evicted, even if the underlying file has not be deleted. We must prevent this from occurring if there are any watches that would be lost. Note that if the dentry was deleted or invalidated (d.vfsd.IsDead()), we should still destroy it along with its watches. Additionally, when a dentry’s last watch is removed, we cache it if it also has zero references. This way, the dentry can eventually be evicted from memory if it is no longer needed. This is accomplished with a new dentry method, OnZeroWatches(), which is called by Inotify.RmWatch and Inotify.Release. Note that it must be called after all inotify locks are released to avoid violating lock order. Stress tests are added to make sure that inotify operations don't deadlock with gofer.OnZeroWatches. Updates #1479. PiperOrigin-RevId: 317958034
2020-06-23Merge release-20200608.0-106-g38d7b2fe5 (automated)gVisor bot
2020-06-22Only allow regular files, sockets, pipes, and char devices to be imported.Dean Deng
PiperOrigin-RevId: 317796028
2020-06-22Merge release-20200608.0-104-g4573e7d86 (automated)gVisor bot
2020-06-22Check for invalid trailing / when traversing path in gofer OpenAt.Dean Deng
Updates #2923. PiperOrigin-RevId: 317700049
2020-06-22Merge release-20200608.0-101-g00928d142 (automated)gVisor bot
2020-06-21Fix vfs2 extended attributes.Dean Deng
Correct behavior when given zero size arguments and trying to set user.* xattrs on files other than regular files or directories. Updates #2923. PiperOrigin-RevId: 317590409
2020-06-19Merge release-20200608.0-99-gad9f46917 (automated)gVisor bot
2020-06-19Fix bugs in vfs2 to make symlink tests pass.Dean Deng
- Return ENOENT if target path is empty. - Make sure open(2) with O_CREAT|O_EXCL returns EEXIST when necessary. - Correctly update atime in tmpfs using touchATime(). Updates #2923. PiperOrigin-RevId: 317382655
2020-06-19Merge release-20200608.0-97-g8655fb724 (automated)gVisor bot
2020-06-19Fix vfs2 proc/self/fd dirent iteration.Dean Deng
Make proc/self/fd iteration work properly. Also, the comment on kernfs.Inode.IterDirents did not accurately reflect how parameters should be used/were used in kernfs.Inode impls other than fdDir. Updates #2923. PiperOrigin-RevId: 317370325
2020-06-19Merge release-20200608.0-94-ga609fff9d (automated)gVisor bot
2020-06-19Fix vfs2 handling of preadv2/pwritev2 flags.Dean Deng
Check for unsupported flags, and silently support RWF_HIPRI by doing nothing. From pkg/abi/linux/file.go: "gVisor does not implement the RWF_HIPRI feature, but the flag is accepted as a valid flag argument for preadv2/pwritev2." Updates #2923. PiperOrigin-RevId: 317330631
2020-06-19Merge release-20200608.0-93-gf40d023ad (automated)gVisor bot
2020-06-19Don't adjust parent link count if we replace a child dir with another.Dean Deng
Updates #2923. PiperOrigin-RevId: 317314460
2020-06-19Merge release-20200608.0-92-g6b69b955d (automated)gVisor bot
2020-06-19Support all seek options in gofer specialFileFD.Seek.Dean Deng
Updates #2923. PiperOrigin-RevId: 317298186
2020-06-19Merge release-20200608.0-91-g46957ed24 (automated)gVisor bot
2020-06-19Fix synthetic file bugs in gofer fs.Dean Deng
Always check if a synthetic file already exists at a location before creating a file there, and do not try to delete synthetic gofer files from the remote fs. This fixes runsc_ptrace socket tests that create/unlink synthetic, named socket files. Updates #2923. PiperOrigin-RevId: 317293648
2020-06-19Merge release-20200608.0-90-g408f3d2cd (automated)gVisor bot
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