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12 Commits
Author SHA1 Message Date
Dean DengandgVisor bot 5fd9ec997d [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 DengandgVisor bot 14bab61090 [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 ScannellandgVisor bot 75df87e081 Add basic stateify annotations. 
Updates #1663

PiperOrigin-RevId: 333539293
 2020-09-24 10:13:04 -07:00
Fabricio VoznikaandgVisor bot 9e0c895aeb Honor readonly flag for root mount 
Updates #1487

PiperOrigin-RevId: 330580699
 2020-09-08 14:00:43 -07:00
Nicolas LacasseandgVisor bot 5bfdceb584 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 BidariandgVisor bot 4a8d0d3f20 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 LacasseandgVisor bot ed24eb37ee Port /dev/net/tun device to VFS2. 
Updates #2912 #1035

PiperOrigin-RevId: 318162565
 2020-06-24 16:23:44 -07:00
Nicolas LacasseandgVisor bot 1f25136e20 Port devpts to VFS2. 
PiperOrigin-RevId: 308164359
 2020-04-23 17:34:29 -07:00
Nicolas LacasseandgVisor bot 899421a0e7 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 649b11f624 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 VoznikaandgVisor bot 0bc53075f9 Remove argument from vfs.MountNamespace.DecRef() 
Updates #1035

PiperOrigin-RevId: 293194631
 2020-02-04 11:48:36 -08:00
Jamie LiuandgVisor bot 07ec260f9a Add //pkg/sentry/fsimpl/devtmpfs. 
PiperOrigin-RevId: 292021389
 2020-01-28 15:05:24 -08:00