freebsd-dev/contrib
Will Andrews 4ed5e25074 Add Linux namespace delegation support
This allows ZFS datasets to be delegated to a user/mount namespace
Within that namespace, only the delegated datasets are visible
Works very similarly to Zones/Jailes on other ZFS OSes

As a user:
```
 $ unshare -Um
 $ zfs list
no datasets available
 $ echo $$
1234
```

As root:
```
 # zfs list
NAME                            ZONED  MOUNTPOINT
containers                      off    /containers
containers/host                 off    /containers/host
containers/host/child           off    /containers/host/child
containers/host/child/gchild    off    /containers/host/child/gchild
containers/unpriv               on     /unpriv
containers/unpriv/child         on     /unpriv/child
containers/unpriv/child/gchild  on     /unpriv/child/gchild

 # zfs zone /proc/1234/ns/user containers/unpriv
```

Back to the user namespace:
```
 $ zfs list
NAME                             USED  AVAIL     REFER  MOUNTPOINT
containers                       129M  47.8G       24K  /containers
containers/unpriv                128M  47.8G       24K  /unpriv
containers/unpriv/child          128M  47.8G      128M  /unpriv/child
```

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Will Andrews <will.andrews@klarasystems.com>
Signed-off-by: Allan Jude <allan@klarasystems.com>
Signed-off-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Co-authored-by: Allan Jude <allan@klarasystems.com>
Co-authored-by: Mateusz Piotrowski <mateusz.piotrowski@klarasystems.com>
Sponsored-by: Buddy <https://buddy.works>
Closes #12263
2022-06-10 09:51:46 -07:00
..
bash_completion.d contrib: bash_completion.d: install, fix dist 2022-05-10 10:20:40 -07:00
bpftrace Replace EXTRA_DIST with dist_noinst_DATA 2022-05-26 09:24:50 -07:00
dracut Replace EXTRA_DIST with dist_noinst_DATA 2022-05-26 09:24:50 -07:00
initramfs Replace EXTRA_DIST with dist_noinst_DATA 2022-05-26 09:24:50 -07:00
intel_qat Add intel_QAT patches 2020-09-30 13:17:30 -07:00
pam_zfs_key autoconf: use include directives instead of recursing down contrib 2022-05-10 10:19:44 -07:00
pyzfs Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00
zcp Replace EXTRA_DIST with dist_noinst_DATA 2022-05-26 09:24:50 -07:00
Makefile.am autoconf: use include directives instead of recursing down contrib 2022-05-10 10:19:44 -07:00