zinject: add "probe" device injection type

Injecting a device probe failure is not possible by matching IO types,
because probe IO goes to the label regions, which is explicitly excluded
from injection. Even if it were possible, it would be awkward to do,
because a probe is sequence of reads and writes.

This commit adds a new IO "type" to match for injection, which looks for
the ZIO_FLAG_PROBE flag instead. Any probe IO will be match the
injection record and recieve the wanted error.

Sponsored-by: Klara, Inc.
Sponsored-by: Wasabi Technology, Inc.
Reviewed-by: Alexander Motin <mav@FreeBSD.org>
Reviewed-by: Tony Hutter <hutter2@llnl.gov>
Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rob Norris <rob.norris@klarasystems.com>
Closes #16947

man/man8/zinject.8

@@ -19,11 +19,11 @@
 .\" CDDL HEADER END
 .\"
 .\" Copyright 2013 Darik Horn <dajhorn@vanadac.com>. All rights reserved.
-.\" Copyright (c) 2024, Klara Inc.
+.\" Copyright (c) 2024, 2025, Klara, Inc.
 .\"
 .\" lint-ok: WARNING: sections out of conventional order: Sh SYNOPSIS
 .\"
-.Dd December 2, 2024
+.Dd January 14, 2025
 .Dt ZINJECT 8
 .Os
 .
@@ -265,15 +265,16 @@ will be translated to the appropriate blkid range according to the
 object's properties.
 .It Fl s Ar seconds
 Run for this many seconds before reporting failure.
-.It Fl T Ar failure
-Set the failure type to one of
-.Sy all ,
-.Sy flush ,
-.Sy claim ,
-.Sy free ,
-.Sy read ,
-or
-.Sy write .
+.It Fl T Ar type
+Inject the error into I/O of this type.
+.Bl -tag -compact -width "read, write, flush, claim, free"
+.It Sy read , Sy write , Sy flush , Sy claim , Sy free
+Fundamental I/O types
+.It Sy all
+All fundamental I/O types
+.It Sy probe
+Device probe I/O
+.El
 .It Fl t Ar mos_type
 Set this to
 .Bl -tag -compact -width "spacemap"