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Updates for target drivers supporting both physical and virtual targets

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@4943 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2013-08-06 22:20:49 +00:00
parent f94393b43c
commit 6de8805015
1 changed files with 10 additions and 4 deletions
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scst/SysfsRules
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@@ -259,20 +259,26 @@ to the target, but this is OPTIONAL.
MUST be 0 by default.
SCST core will automatically create for all targets the following
attributes:
attribute:
1. "rel_tgt_id" - allows to read or write SCSI Relative Target Port
Identifier attribute.
2. "hw_target" - allows to distinguish hardware and virtual targets, if
the target driver supports both.
To provide OPTIONAL force close session functionality target drivers
MUST implement it using "force_close" write only session's attribute,
which on write to it MUST close the corresponding session.
See SCST core's README for more info about those attributes.
If a target driver supports both physical, i.e. hardware, and virtual
targets, as, for instance, NPIV Fibre Channel targets, to allow to
distinguish between them the physical targets MUST have "hw_target"
attribute, which MUST have value 1. The virtual targets MUST have
"parent_host" attribute, which MUST contain name of the parent hardware
target. Also, such target drivers MUST create virtual targets using
"add_target" command to mgmt attribute (see above), which MUST specify
the parent target for new virtual targets using "parent_host" attribute.
II. Rules for dev handlers
==========================