From: Martin Wilck <mwilck@xxxxxxxx> Add documentation for foreign library support, and for the "enable_foreign" parameter. Signed-off-by: Martin Wilck <mwilck@xxxxxxxx> --- multipath/multipath.conf.5 | 40 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/multipath/multipath.conf.5 b/multipath/multipath.conf.5 index 23a79e9b..e866da23 100644 --- a/multipath/multipath.conf.5 +++ b/multipath/multipath.conf.5 @@ -1220,6 +1220,21 @@ makes multipath immediately mark a device with only ghost paths as ready. The default is: \fBno\fR .RE . +. +.TP +.B enable_foreign +Enables or disables foreign libraries (see section +.I FOREIGN MULTIPATH SUPPORT +below). The value is a regular expression; foreign libraries are loaded +if their name (e.g. \(dqnvme\(dq) matches the expression. By default, +all foreign libraries are enabled. +.RS +.TP +The default is: \fB\(dq\(dq\fR (the empty regular expression) +.RE +. +. + . .\" ---------------------------------------------------------------------------- .SH "blacklist and blacklist_exceptions sections" @@ -1763,6 +1778,31 @@ unpredictable ways. If the \(dqmarginal_path\(dq method is active, the . . .\" ---------------------------------------------------------------------------- +.SH "FOREIGN MULTIPATH SUPPORT" +.\" ---------------------------------------------------------------------------- +. +multipath and multipathd can load \(dqforeign\(dq libraries to add +support for other multipathing technologies besides the Linux device mapper. +Currently this support is limited to printing detected information about +multipath setup. In topology output, the names of foreign maps are prefixed by +the foreign library name in square brackets, as in this example: +. +.P +.EX +# multipath -ll +uuid.fedcba98-3579-4567-8765-123456789abc [nvme]:nvme4n9 NVMe,Some NVMe controller,FFFFFFFF +size=167772160 features='n/a' hwhandler='ANA' wp=rw +|-+- policy='n/a' prio=50 status=optimized +| `- 4:38:1 nvme4c38n1 0:0 n/a optimized live +`-+- policy='n/a' prio=50 status=optimized + `- 4:39:1 nvme4c39n1 0:0 n/a optimized live +.EE +. +.P +The \(dqnvme\(dq foreign library provides support for NVMe native multipathing +in the kernel. It is part of the standard multipath package. +. +.\" ---------------------------------------------------------------------------- .SH "KNOWN ISSUES" .\" ---------------------------------------------------------------------------- . -- 2.23.0 -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
