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Fix 'zpool add' safety check corner cases

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Three cases were discovered where 'zpool add' would fail to
warn when adding vdevs to a pool with a mismatched replication
level.  These are:

  1. When a pool contains mixed file and disk vdevs.
  2. When a pool contains an active dRAID distributed spare
  3. When a pool contains an active hot spare

The lack of warnings are caused by get_replication() assessing
the current pool configuration an inconsistent and disabling
the mismatched replication check for the new pool configuration
after 'zpool add'.  This change updates get_replication() to
be slightly more tolerant in the non-fatal case.

The zpool_add_010_pos.ksh test case was split in to separate
tests: zpool_add_warn_create.ksh, pool_add_warn_degraded.ksh,
and zpool_add_warn_removal.  These test were extended to
include coverage for dRAID pools and the three scenarios
described above.

Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #17780
This commit is contained in:
Brian Behlendorf
2025-09-25 09:32:59 -07:00
committed by Tony Hutter
parent 7d7ae8979a
commit 3167b0db10
7 changed files with 392 additions and 97 deletions
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tests/runfiles/common.run
+2 -1
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@@ -372,7 +372,8 @@ tags = ['functional', 'cli_root', 'zpool']
[tests/functional/cli_root/zpool_add]
tests = ['zpool_add_001_pos', 'zpool_add_002_pos', 'zpool_add_003_pos',
'zpool_add_004_pos', 'zpool_add_006_pos', 'zpool_add_007_neg',
'zpool_add_008_neg', 'zpool_add_009_neg', 'zpool_add_010_pos',
'zpool_add_008_neg', 'zpool_add_009_neg', 'zpool_add_warn_create',
'zpool_add_warn_degraded', 'zpool_add_warn_removal',
'add-o_ashift', 'add_prop_ashift', 'zpool_add_dryrun_output',
'zpool_add--allow-ashift-mismatch']
tags = ['functional', 'cli_root', 'zpool_add']