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libzpool: tunable-based option interface for zdb/ztest

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Removes the old dlsym() based option setter and adds a new
function handle_tunable_option() that can set, get and list all the
tunables in the system. And then wire it up to zdb and ztest.

Sponsored-by: https://despairlabs.com/sponsor/
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Signed-off-by: Rob Norris <robn@despairlabs.com>
Closes #17537
This commit is contained in:
Rob Norris
2025-07-12 11:33:19 +10:00
committed by Brian Behlendorf
parent cb9742e532
commit fce18e04d5
7 changed files with 133 additions and 102 deletions
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man/man1/ztest.1
+2 -6
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@@ -188,12 +188,8 @@ i.e. given
will be loaded.
.It Fl C , -vdev-class-state Ns = Ns Sy on Ns | Ns Sy off Ns | Ns Sy random No (default : Sy random )
The vdev allocation class state.
.It Fl o , -option Ns = Ns Ar variable Ns = Ns Ar value
Set global
.Ar variable
to an unsigned 32-bit integer
.Ar value
(little-endian only).
.It Fl o , -option Ns = Ns Ar var Ns = Ns Ar value Ns …
Set the given tunable to the provided value.
.It Fl G , -dump-debug
Dump zfs_dbgmsg buffer before exiting due to an error.
.It Fl V , -verbose