Commit Graph

16 Commits

Author SHA1 Message Date
Nicolas Lacasse 0d1e299079 Pass configurable FilesystemType to tmpfs.
PiperOrigin-RevId: 304234086
2020-04-01 12:06:37 -07:00
Nicolas Lacasse 9de982ea79 Allow passing root file type to tmpfs.
PiperOrigin-RevId: 304053357
2020-03-31 15:02:57 -07:00
Nicolas Lacasse 10f2c8db91 Add FilesystemType.Name method, and FilesystemType field to Filesystem struct.
Both have analogues in Linux:
* struct file_system_type has a char *name field.
* struct super_block keeps a pointer to the file_system_type.

These fields are necessary to support the `filesystem type` field in
/proc/[pid]/mountinfo.

PiperOrigin-RevId: 303434063
2020-03-27 16:56:16 -07:00
Fabricio Voznika de694e5484 Combine file mode and isDir arguments
Updates #1035

PiperOrigin-RevId: 303021328
2020-03-26 08:48:04 -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
Fabricio Voznika 0f60799a4f Add calls to vfs.CheckSetStat to fsimpls
Only gofer filesystem was calling vfs.CheckSetStat for
vfs.FilesystemImpl.SetStatAt and vfs.FileDescriptionImpl.SetStat.

Updates #1193, #1672, #1197

PiperOrigin-RevId: 301226522
2020-03-16 13:29:12 -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
gVisor bot 4075de11be Plumb VFS2 inside the Sentry
- Added fsbridge package with interface that can be used to open
  and read from VFS1 and VFS2 files.
- Converted ELF loader to use fsbridge
- Added VFS2 types to FSContext
- Added vfs.MountNamespace to ThreadGroup

Updates #1623

PiperOrigin-RevId: 295183950
2020-02-14 11:12:47 -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 18a7e1309d Add support for device special files to VFS2 tmpfs.
PiperOrigin-RevId: 291471892
2020-01-24 17:07:54 -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
Nicolas Lacasse d6fb1ec6c7 Add timestamps to VFS2 tmpfs, and implement some of SetStat.
PiperOrigin-RevId: 289962040
2020-01-15 16:32:55 -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