gvisor

Commit Graph

Author	SHA1	Message	Date
Jamie Liu	d135b5abf6	Add anonymous device number allocation to VFS2. Note that in VFS2, filesystem device numbers are per-vfs.FilesystemImpl rather than global, avoiding the need for a "registry" type to handle save/restore. (This is more consistent with Linux anyway: compare e.g. mm/shmem.c:shmem_mount() => fs/super.c:mount_nodev() => (indirectly) set_anon_super().) PiperOrigin-RevId: 291425193	2020-01-24 12:54:39 -08:00
Jamie Liu	1f384ac42b	Add VFS2 support for device special files. - Add FileDescriptionOptions.UseDentryMetadata, which reduces the amount of boilerplate needed for device FDs and the like between filesystems. - Switch back to having FileDescription.Init() take references on the Mount and Dentry; otherwise managing refcounts around failed calls to OpenDeviceSpecialFile() / Device.Open() is tricky. PiperOrigin-RevId: 287575574	2019-12-30 11:36:41 -08:00

Author

SHA1

Message

Date

Jamie Liu

d135b5abf6

Add anonymous device number allocation to VFS2.

Note that in VFS2, filesystem device numbers are per-vfs.FilesystemImpl rather
than global, avoiding the need for a "registry" type to handle save/restore.
(This is more consistent with Linux anyway: compare e.g.
mm/shmem.c:shmem_mount() => fs/super.c:mount_nodev() => (indirectly)
set_anon_super().)

PiperOrigin-RevId: 291425193

2020-01-24 12:54:39 -08:00

Jamie Liu

1f384ac42b

Add VFS2 support for device special files.

- Add FileDescriptionOptions.UseDentryMetadata, which reduces the amount of
  boilerplate needed for device FDs and the like between filesystems.

- Switch back to having FileDescription.Init() take references on the Mount and
  Dentry; otherwise managing refcounts around failed calls to
  OpenDeviceSpecialFile() / Device.Open() is tricky.

PiperOrigin-RevId: 287575574

2019-12-30 11:36:41 -08:00

2 Commits