Commit Graph

10 Commits

Author SHA1 Message Date
Adin Scannell add40fd6ad Update canonical repository.
This can be merged after:
https://github.com/google/gvisor-website/pull/77
  or
https://github.com/google/gvisor-website/pull/78

PiperOrigin-RevId: 253132620
2019-06-13 16:50:15 -07:00
Michael Pratt 4d52a55201 Change copyright notice to "The gVisor Authors"
Based on the guidelines at
https://opensource.google.com/docs/releasing/authors/.

1. $ rg -l "Google LLC" | xargs sed -i 's/Google LLC.*/The gVisor Authors./'
2. Manual fixup of "Google Inc" references.
3. Add AUTHORS file. Authors may request to be added to this file.
4. Point netstack AUTHORS to gVisor AUTHORS. Drop CONTRIBUTORS.

Fixes #209

PiperOrigin-RevId: 245823212
Change-Id: I64530b24ad021a7d683137459cafc510f5ee1de9
2019-04-29 14:26:23 -07:00
Jamie Liu b4006686d2 Don't expand COW-break on executable VMAs.
PiperOrigin-RevId: 241403847
Change-Id: I4631ca05734142da6e80cdfa1a1d63ed68aa05cc
2019-04-01 14:47:31 -07:00
Jamie Liu f3723f8059 Call memmap.Mappable.Translate with more conservative usermem.AccessType.
MM.insertPMAsLocked() passes vma.maxPerms to memmap.Mappable.Translate
(although it unsets AccessType.Write if the vma is private). This
somewhat simplifies handling of pmas, since it means only COW-break
needs to replace existing pmas. However, it also means that a MAP_SHARED
mapping of a file opened O_RDWR dirties the file, regardless of the
mapping's permissions and whether or not the mapping is ever actually
written to with I/O that ignores permissions (e.g.
ptrace(PTRACE_POKEDATA)).

To fix this:

- Change the pma-getting path to request only the permissions that are
required for the calling access.

- Change memmap.Mappable.Translate to take requested permissions, and
return allowed permissions. This preserves the existing behavior in the
common cases where the memmap.Mappable isn't
fsutil.CachingInodeOperations and doesn't care if the translated
platform.File pages are written to.

- Change the MM.getPMAsLocked path to support permission upgrading of
pmas outside of copy-on-write.

PiperOrigin-RevId: 240196979
Change-Id: Ie0147c62c1fbc409467a6fa16269a413f3d7d571
2019-03-25 12:42:43 -07:00
Jamie Liu 8f4634997b Decouple filemem from platform and move it to pgalloc.MemoryFile.
This is in preparation for improved page cache reclaim, which requires
greater integration between the page cache and page allocator.

PiperOrigin-RevId: 238444706
Change-Id: Id24141b3678d96c7d7dc24baddd9be555bffafe4
2019-03-14 08:12:48 -07:00
Jamie Liu 898838e34d Fix mremap expansion with mm.checkInvariants = true.
Also remove useless RSS changes in mm.movePMAsLocked().

PiperOrigin-RevId: 226052996
Change-Id: If59fd259b93238fb2f15c1c8ebfeda14cb590a87
2018-12-18 13:50:33 -08:00
Jamie Liu 3b3f026278 Truncate ar before calling mm.breakCopyOnWriteLocked().
... as required by the latter's precondition.

PiperOrigin-RevId: 226033824
Change-Id: I6bc46d0e100c61cc58cb5fc69e70c4ca905cd92d
2018-12-18 11:52:31 -08:00
Ian Gudger 8fce67af24 Use correct company name in copyright header
PiperOrigin-RevId: 217951017
Change-Id: Ie08bf6987f98467d07457bcf35b5f1ff6e43c035
2018-10-19 16:35:11 -07:00
Jamie Liu ee0ef506d4 Add MemoryManager.Pin.
PiperOrigin-RevId: 204162313
Change-Id: Ib0593dde88ac33e222c12d0dca6733ef1f1035dc
2018-07-11 11:52:09 -07:00
Googler d02b74a5dc Check in gVisor.
PiperOrigin-RevId: 194583126
Change-Id: Ica1d8821a90f74e7e745962d71801c598c652463
2018-04-28 01:44:26 -04:00