Commit Graph

14 Commits

Author SHA1 Message Date
Fabricio Voznika 67565078bb Implement flock(2) in VFS2
LockFD is the generic implementation that can be embedded in
FileDescriptionImpl implementations. Unique lock ID is
maintained in vfs.FileDescription and is created on demand.

Updates #1480

PiperOrigin-RevId: 315604825
2020-06-09 18:46:42 -07:00
Jamie Liu dc029b4b96 Implement VFS2 tmpfs mount options.
As in VFS1, the mode, uid, and gid options are supported.

Updates #1197

PiperOrigin-RevId: 315340510
2020-06-08 13:28:18 -07:00
Jamie Liu af3121a523 Implement splice(2) and tee(2) for VFS2.
Updates #138

PiperOrigin-RevId: 313326354
2020-05-26 21:43:26 -07:00
Nicolas Lacasse 47dfba7661 Port memfd_create to vfs2 and finish implementation of file seals.
Closes #2612.

PiperOrigin-RevId: 311548074
2020-05-14 09:35:54 -07:00
Fabricio Voznika dd3bc49997 Add NAME_MAX checks and update file times
NAME_MAX should be enforced per filesystem implementation
because other file systems may not have the same restriction.

Gofer filesystem now keeps a reference to the kernel clock to
avoid lookup in the Context on file access to update atime.

Update access, modification, and status change times in tmpfs.

Updates #1197, #1198.

PiperOrigin-RevId: 304527148
2020-04-02 19:39:03 -07:00
Fabricio Voznika c7f5673529 Set file mode and type to attribute
Makes less error prone to find file type.

Updates #1197

PiperOrigin-RevId: 302974244
2020-03-25 14:49:13 -07:00
Fabricio Voznika 2a6c4369be Enforce file size rlimits in VFS2
Updates #1035

PiperOrigin-RevId: 301255357
2020-03-16 16:00:49 -07:00
gVisor bot 10ed60e477 VFS2: Support memory mapping in tmpfs.
tmpfs.fileDescription now implements ConfigureMMap. And tmpfs.regularFile
implement memmap.Mappable. The methods are mostly unchanged from VFS1 tmpfs.

PiperOrigin-RevId: 296234557
2020-02-20 09:58:10 -08:00
Dean Deng 6c3072243d Implement file locks for regular tmpfs files in VFSv2.
Add a file lock implementation that can be embedded into various filesystem
implementations.

Updates #1480

PiperOrigin-RevId: 292614758
2020-01-31 14:15:41 -08:00
Adin Scannell 0e2f1b7abd Update package locations.
Because the abi will depend on the core types for marshalling (usermem,
context, safemem, safecopy), these need to be flattened from the sentry
directory. These packages contain no sentry-specific details.

PiperOrigin-RevId: 291811289
2020-01-27 15:31:32 -08:00
Jamie Liu 5ab1213a6c Move VFS2 handling of FD readability/writability to vfs.FileDescription.
PiperOrigin-RevId: 291006713
2020-01-22 12:29:36 -08:00
Nicolas Lacasse 70d7c52bd7 Implement tmpfs.SetStat with a size argument.
This is similar to 'Truncate' in vfs1.

Updates https://github.com/google/gvisor/issues/1197

PiperOrigin-RevId: 290139140
2020-01-16 14:39:55 -08:00
Ian Gudger 27500d529f New sync package.
* Rename syncutil to sync.
* Add aliases to sync types.
* Replace existing usage of standard library sync package.

This will make it easier to swap out synchronization primitives. For example,
this will allow us to use primitives from github.com/sasha-s/go-deadlock to
check for lock ordering violations.

Updates #1472

PiperOrigin-RevId: 289033387
2020-01-09 22:02:24 -08:00
Nicolas Lacasse 51f3ab85e0 Convert memfs into proto-tmpfs.
- Renamed memfs to tmpfs.
- Copied fileRangeSet bits from fs/fsutil/ to fsimpl/tmpfs/
- Changed tmpfs to be backed by filemem instead of byte slice.
- regularFileReadWriter uses a sync.Pool, similar to gofer client.

PiperOrigin-RevId: 288356380
2020-01-06 12:52:55 -08:00