mirror_zfs/lib/libspl
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
..
include Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00
os Add Linux namespace delegation support 2022-06-10 09:51:46 -07:00
assert.c Add --enable-asan and --enable-ubsan switches 2022-02-03 14:35:38 -08:00
atomic.c Clean up CSTYLEDs 2022-01-26 11:38:52 -08:00
getexecname.c libspl: lift common bits of getexecname() 2021-04-15 14:55:40 -07:00
libspl_impl.h libspl: lift common bits of getexecname() 2021-04-15 14:55:40 -07:00
list.c Fixing gang ABD child removal race condition 2020-07-14 11:04:35 -07:00
Makefile.am autoconf: use include directives instead of recursing down lib 2022-05-10 10:18:11 -07:00
mkdirp.c Fix typos in lib/ 2019-09-02 17:53:27 -07:00
page.c libspl: fix warning about missing spl_pagesize declaration 2021-09-24 16:59:26 -06:00
strlcat.c Check for strlcat and strlcpy 2018-12-11 16:01:41 -08:00
strlcpy.c Check for strlcat and strlcpy 2018-12-11 16:01:41 -08:00
timestamp.c libspl: print_timestamp: use localtime_r() 2022-04-05 09:45:33 -07:00