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33 Commits
Author SHA1 Message Date
Rahat MahmoodandgVisor bot b4820e5986 Implement StatFS for various VFS2 filesystems. 
This mainly involved enabling kernfs' client filesystems to provide a
StatFS implementation.

Fixes #3411, #3515.

PiperOrigin-RevId: 329009864
 2020-08-28 14:31:11 -07:00
Nayana BidariandgVisor bot 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
Craig Chi 8494a0325d Include context in kernfs.Inode.Stat method 
To implement stat(2) in FUSE, we have to embed credentials and pid in request
header. The information should be extracted from the context passed to VFS
layer. Therefore `Stat()` signature in `kernfs.Inode` interface should include
context as first argument. Some other fs implementations need to be modified as
well, such as devpts, host, pipefs, and proc.

Fixes #3235
 2020-07-14 15:56:41 -07:00
Fabricio VoznikaandgVisor bot 96519e2c9d Implement POSIX locks 
- Change FileDescriptionImpl Lock/UnlockPOSIX signature to
  take {start,length,whence}, so the correct offset can be
  calculated in the implementations.
- Create PosixLocker interface to make it possible to share
  the same locking code from different implementations.

Closes #1480

PiperOrigin-RevId: 316910286
 2020-06-17 10:04:26 -07:00
Fabricio VoznikaandgVisor bot 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
Fabricio VoznikaandgVisor bot 20e6efd302 Remove IfChange/ThenChange lint from VFS2 
As new functionality is added to VFS2, corresponding files in VFS1
don't need to be changed.

PiperOrigin-RevId: 312153799
 2020-05-18 14:26:09 -07:00
Dean DengandgVisor bot 632b104aff Plumb context.Context into kernfs.Inode.Open(). 
PiperOrigin-RevId: 308304793
 2020-04-24 12:37:49 -07:00
Nicolas LacasseandgVisor bot 696feaf10c Port devpts to VFS2. 
PiperOrigin-RevId: 308164359
 2020-04-23 17:34:29 -07:00