zpool/zfs: Add '-a|--all' option to scrub, trim, initialize

Add support for the '-a | --all' option to perform trim,
scrub, and initialize operations on all pools.
Previously, specifying a pool name was mandatory for
these operations. With this enhancement, users can now
execute these operations across all pools at once,
without needing to manually iterate over each pool
from the command line.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tino Reichardt <milky-zfs@mcmilk.de>
Signed-off-by: Akash B <akash-b@hpe.com>
Closes #17524

man/man8/zpool-initialize.8

@@ -26,6 +26,7 @@
 .\" Copyright (c) 2018 George Melikov. All Rights Reserved.
 .\" Copyright 2017 Nexenta Systems, Inc.
 .\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+.\" Copyright (c) 2025 Hewlett Packard Enterprise Development LP.
 .\"
 .Dd May 27, 2021
 .Dt ZPOOL-INITIALIZE 8
@@ -39,7 +40,7 @@
 .Cm initialize
 .Op Fl c Ns | Ns Fl s | Ns Fl u
 .Op Fl w
-.Ar pool
+.Fl a Ns | Ns Ar pool
 .Oo Ar device Oc Ns …
 .
 .Sh DESCRIPTION
@@ -48,6 +49,10 @@ devices, or all eligible devices in the pool if no individual devices are
 specified.
 Only leaf data or log devices may be initialized.
 .Bl -tag -width Ds
+.It Fl a , -all
+Begin, cancel, suspend initializing on
+all
+pools.
 .It Fl c , -cancel
 Cancel initializing on the specified devices, or all eligible devices if none
 are specified.

man/man8/zpool-scrub.8

@@ -26,6 +26,7 @@
 .\" Copyright (c) 2018, 2021 George Melikov. All Rights Reserved.
 .\" Copyright 2017 Nexenta Systems, Inc.
 .\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+.\" Copyright (c) 2025 Hewlett Packard Enterprise Development LP.
 .\"
 .Dd November 18, 2024
 .Dt ZPOOL-SCRUB 8
@@ -39,7 +40,7 @@
 .Cm scrub
 .Op Ns Fl e | Ns Fl p | Fl s Ns | Fl C Ns
 .Op Fl w
-.Ar pool Ns …
+.Fl a Ns | Ns Ar pool Ns …
 .
 .Sh DESCRIPTION
 Begins a scrub or resumes a paused scrub.
@@ -89,6 +90,12 @@ During this period, no completion time estimate will be provided.
 .
 .Sh OPTIONS
 .Bl -tag -width "-s"
+.It Fl a , -all
+Begin, pause, stop scrub on
+all
+pools.
+Initiating scrubs on multiple pools can put considerable load and memory
+pressure on the system, so this operation should be performed with caution.
 .It Fl s
 Stop scrubbing.
 .It Fl p

man/man8/zpool-trim.8

@@ -26,6 +26,7 @@
 .\" Copyright (c) 2018 George Melikov. All Rights Reserved.
 .\" Copyright 2017 Nexenta Systems, Inc.
 .\" Copyright (c) 2017 Open-E, Inc. All Rights Reserved.
+.\" Copyright (c) 2025 Hewlett Packard Enterprise Development LP.
 .\"
 .Dd May 27, 2021
 .Dt ZPOOL-TRIM 8
@@ -40,7 +41,7 @@
 .Op Fl dw
 .Op Fl r Ar rate
 .Op Fl c Ns | Ns Fl s
-.Ar pool
+.Fl a Ns | Ns Ar pool
 .Oo Ar device Ns Oc Ns …
 .
 .Sh DESCRIPTION
@@ -57,6 +58,10 @@ See the documentation for the
 .Sy autotrim
 property above for the types of vdev devices which can be trimmed.
 .Bl -tag -width Ds
+.It Fl a , -all
+Perform TRIM operation on
+all
+pools.
 .It Fl d , -secure
 Causes a secure TRIM to be initiated.
 When performing a secure TRIM, the