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Fix "snapdev" property issues

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When inheriting the "snapdev" property to we don't always call
zfs_prop_set_special(): this prevents device nodes from being created in
certain situations. Because "snapdev" is the only *special* property
that is also inheritable we need to call zfs_prop_set_special() even
when we're not reverting it to the received value ('zfs inherit -S').

Additionally, fix a NULL pointer dereference accidentally introduced in
5559ba0 that can be triggered when setting the "snapdev" property to
the value "hidden" twice.

Finally, add a new test case "zvol_misc_snapdev" to the ZFS Test Suite.

Reviewed by: Boris Protopopov <bprotopopov@hotmail.com>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: loli10K <ezomori.nozomu@gmail.com>
Closes #6131 
Closes #6175 
Closes #6176
This commit is contained in:
LOLi
2017-06-02 16:17:00 +02:00
committed by Brian Behlendorf
parent b870c4b5d7
commit 92aceb2a7e
5 changed files with 248 additions and 64 deletions
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tests/runfiles/linux.run
+2 -1
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@@ -564,7 +564,8 @@ 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_004_pos', 'zvol_misc_005_neg', 'zvol_misc_006_pos',
'zvol_misc_snapdev']
[tests/functional/zvol/zvol_swap]
tests = ['zvol_swap_001_pos', 'zvol_swap_002_pos', 'zvol_swap_003_pos',