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Add port of FreeBSD 'volmode' property

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The volmode property may be set to control the visibility of ZVOL
block devices.

This allow switching ZVOL between three modes:
   full - existing fully functional behaviour (default)
   dev  - hide partitions on ZVOL block devices
   none - not exposing volumes outside ZFS

Additionally the new zvol_volmode module parameter can be used to
control the default behaviour.

This functionality can be used, for instance, on "backup" pools to
avoid cluttering /dev with unneeded zd* devices.

Original-patch-by: mav <mav@FreeBSD.org>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Ported-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>

FreeBSD-commit: https://github.com/freebsd/freebsd/commit/dd28e6bb
Closes #1796 
Closes #3438 
Closes #6233
This commit is contained in:
LOLi
2017-07-12 22:05:37 +02:00
committed by Brian Behlendorf
parent e19572e4cc
commit cf8738d853
14 changed files with 634 additions and 83 deletions
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tests/runfiles/linux.run
+1 -1
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@@ -569,7 +569,7 @@ tests = ['zvol_cli_001_pos', 'zvol_cli_002_pos', 'zvol_cli_003_neg']
[tests/functional/zvol/zvol_misc]
tests = ['zvol_misc_001_neg', 'zvol_misc_002_pos', 'zvol_misc_003_neg',
'zvol_misc_004_pos', 'zvol_misc_005_neg', 'zvol_misc_006_pos',
'zvol_misc_snapdev']
'zvol_misc_snapdev', 'zvol_misc_volmode']
[tests/functional/zvol/zvol_swap]
tests = ['zvol_swap_001_pos', 'zvol_swap_002_pos', 'zvol_swap_003_pos',