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13 Commits

Author SHA1 Message Date
Ian Lewis e6a9780f3c Fix TODO comments. 
Fix TODO comments referring to incorrect issue numbers. Also fix the link in
issue reviver comments to include the right url fragment.

PiperOrigin-RevId: 373491821
 2021-05-12 18:09:03 -07:00
Dean Deng 432963dd2d [vfs2] Don't take reference in Task.MountNamespaceVFS2 and MountNamespace.Root. 
This fixes reference leaks related to accidentally forgetting to DecRef()
after calling one or the other.

PiperOrigin-RevId: 336918922
 2020-10-13 11:31:22 -07:00
Dean Deng 577c82f22c [vfs2] Add FilesystemType.Release to avoid reference leaks. 
Singleton filesystem like devpts and devtmpfs have a single filesystem shared
among all mounts, so they acquire a "self-reference" when initialized that
must be released when the entire virtual filesystem is released at sandbox
exit.

PiperOrigin-RevId: 336828852
 2020-10-13 01:13:22 -07:00
Adin Scannell 0a7075f38a Add basic stateify annotations. 
Updates #1663

PiperOrigin-RevId: 333539293
 2020-09-24 10:13:04 -07:00
Fabricio Voznika c8f1ce288d Honor readonly flag for root mount 
Updates #1487

PiperOrigin-RevId: 330580699
 2020-09-08 14:00:43 -07:00
Nicolas Lacasse 2c422b7f21 Fix parent directory creation in CreateDeviceFile. 
It was not properly creating recursive directories. Added tests for this case.

Updates #1196

PiperOrigin-RevId: 327850811
 2020-08-21 12:10:14 -07:00
Nayana Bidari b2ae7ea1bb Plumbing context.Context to DecRef() and Release(). 
context is passed to DecRef() and Release() which is
needed for SO_LINGER implementation.

PiperOrigin-RevId: 324672584
 2020-08-03 13:36:05 -07:00
Nicolas Lacasse 58880bf551 Port /dev/net/tun device to VFS2. 
Updates #2912 #1035

PiperOrigin-RevId: 318162565
 2020-06-24 16:23:44 -07:00
Nicolas Lacasse 696feaf10c Port devpts to VFS2. 
PiperOrigin-RevId: 308164359
 2020-04-23 17:34:29 -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
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
Fabricio Voznika dcffddf0ca Remove argument from vfs.MountNamespace.DecRef() 
Updates #1035

PiperOrigin-RevId: 293194631
 2020-02-04 11:48:36 -08:00
Jamie Liu 2862b0b1be Add //pkg/sentry/fsimpl/devtmpfs. 
PiperOrigin-RevId: 292021389
 2020-01-28 15:05:24 -08:00