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Add enclosure_symlinks option to vdev_id

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Add an 'enclosure_symlinks' option to vdev_id.conf.  This creates
consistently named symlinks to the enclosure devices (/dev/sg*) based
off the configuration in vdev_id.conf.  The enclosure symlinks show
up in /dev/by-enclosure/<prefix>-<channel><num>.  The links make it
make it easy to run sg_ses on a particular enclosure device.  The
enclosure links are created in addition to the normal
/dev/disk/by-vdev links.

'enclosure_symlinks' is only valid in sas_direct configurations.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Simon Guest <simon.guest@tesujimath.org>
Signed-off-by: Tony Hutter <hutter2@llnl.gov>
Closes #8194
This commit is contained in:
Tony Hutter
2018-12-14 17:27:49 -08:00
committed by Brian Behlendorf
parent 7c46894081
commit c66401fae0
4 changed files with 112 additions and 3 deletions
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man/man5/vdev_id.conf.5
+34
View File
@@ -38,6 +38,19 @@ defined by udev. This may be an absolute path or the base filename.
Maps a physical path to a channel name (typically representing a single
disk enclosure).
.TP
\fIenclosure_symlinks\fR <yes|no>
Additionally create /dev/by-enclosure symlinks to the disk enclosure
sg devices using the naming scheme from from vdev_id.conf.
\fIenclosure_symlinks\fR is only allowed for sas_direct mode.
.TP
\fIenclosure_symlinks_prefix\fR <prefix>
Specify the prefix for the enclosure symlinks in the form of:
/dev/by-enclosure/<prefix>-<channel><num>
Defaults to "enc" if not specified.
.TP
\fIpci_slot\fR - specifies the PCI SLOT of the HBA
hosting the disk enclosure being mapped, as found in the output of
.BR lspci (8).
@@ -169,6 +182,27 @@ definitions - one per physical path.
channel 86:00.0 0 B
.fi
.P
A configuration with enclosure_symlinks enabled.
.P
.nf
multipath yes
enclosure_symlinks yes
# PCI_ID HBA PORT CHANNEL NAME
channel 05:00.0 1 U
channel 05:00.0 0 L
channel 06:00.0 1 U
channel 06:00.0 0 L
.fi
In addition to the disks symlinks, this configuration will create:
.P
.nf
/dev/by-enclosure/enc-L0
/dev/by-enclosure/enc-L1
/dev/by-enclosure/enc-U0
/dev/by-enclosure/enc-U1
.fi
.P
A configuration using device link aliases.
.P
.nf