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The CHARON-AXP FC Fabric presentation mode allows to use Linux FC HBA directly. When using this mode, there is no need to load KGPSA adapter(s) as it was described before. The following syntax has to be used instead:
Example:
load kgpsa_generic_storage PGA interface="host3" |
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First we need to find Linux FC HBA for mapping.
List available adapters
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So, 2 HBAs, 3 ports are available.
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Load HBA's kernel modules (drivers)
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Discover the Linux SCSI hosts the FC HBAs are mapped to
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So, the available ports are mapped to hosts 3, 4 and 6.
Discover the connected FC HBAs (ports)
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So the connected hosts are 3 and 6 ("MSA CONTROLLER").
Discover the HBAs port/node names
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So the names are:
| Host | Mapping | Port name |
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| 3 | Lancer-X, port 0 ("3:0:0:0") | 0x10000090faa00a31 |
| 4 | Lancer-X, port 1 ("3:0:0:1") | 0x10000090faa00a32 |
| 6 | LP8000 single port | 0x10000000c923ea51 |
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Specify Linux port name "0x10000090faa00a31" in Charon configuration file:
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The configuration given with port name is independent on hardware change, modules load order, etc |
By host id name
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or
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The configuration given with host id name might change on hardware change, modules load order, etc |
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| Mapping | Description |
|---|---|
fc_host6 | Emulation over Linux SG (FC) host 6 |
host6 | Emulation over Linux SG (FC) host 6 |
2000-0000-C923-EA51 | Emulation over Linux SG (FC) host given with port/node name |
0x20000000C923EA51 | Emulation over Linux SG (FC) host given with port/node name |
wwn-0x20000000C923EA51 | Emulation over Linux SG (FC) host given with port/node name |
Example:
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trace_level
| Value | Description |
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0 | none (default) |
1 | All failures and suspects |
| 2 | SCSI, ELS/CT request flow |
3 | MB/IOCB request flow |
Example:
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io_model
I/O model is used for request processing.
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| Value | Description |
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sync | synchronous |
async | asynchronous (default) |
Example:
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port_name
The port name in format: %04x-%04x-%04x-%04x. Option to fake guest's port name.
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This parameter is needed for debugging puproses only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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By default this value is obtained from the specified hardware port (see above).
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| Note |
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This parameter is needed for debugging puproses only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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By default this value is obtained from the specified hardware port (see above).
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When FC wire is removed and then plugged in, Linux rebuilds all the FC objects with new devices names, etc. Fabric presentation mode senses the link up and down events, but optionally it may delay reporting the event (for the given amount of seconds) to let Linux fully initialize FC. If delay is 0, guest OS may start initialization too early and thus fail to find some or all objects.
Example:
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link_poll_period
The link check poill interval in seconds Default is 1 second.
When FC wire is removed and then plugged in, Linux rebuilds all the FC objects with new devices names, etc. Fabric presentation mode senses the link up and down events, but optionally it may delay reporting the event (for the given amount of seconds) to let Linux fully initialize FC. If delay is 0, guest OS may start initialization too early and thus fail to find some or all objects.
Example:
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emu_fabric
The way the emulation deals with fabric:
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Qlogic does not map SG devices for ELS/CT traffic. To work around this, Fabric presentation mode implements emulation of the whole non FCP (scsi) communication over fabric. If fabric is emulated, guest OS will not see non FCP target ports (for example initiators) and will not be able to communicate with ELS/CT over fabric.
Example:
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lun_exclude
The list of the LUNs to be excluded. If empty (default), nothing is excluded.
No multi line is possible for this parameter; the maximum number of symbols inside the double quotes is 255. Use "lun_include" parameter instead if a lot of LUNs must be excluded to specify only the included LUNs.
Example:
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lun_exclude parameter cannot exclude storage mapped to LUN 0 because of its special function. |
lun_include
The list of the LUNs to be included. If empty (default), all LUNs are included. No multi line is possible for this parameter; the maximum number of symbols inside the double quotes is 255. Use "lun_exclude" parameter instead if a lot of LUNs must be included to specify only the excluded LUNs.
Example:
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scsi_version
This approach of FC emulation downgrades all attached devices to the specifically defined version of SCSI. This is done to make legacy guest operating systems happy with attached modern devices.
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Refer to your guest OS documentation for more details and public resources for general specification of SCSI.
Example:
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device_id
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This parameter is needed for some specific cases only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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vendor_id
A fake vendor id (if not "lp8000" is needed), the default is "0x10DF" ("lp8000").
| Note |
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This parameter is needed for some specific cases only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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revision_id
A fake revision id (if not "lp8000" is needed), the default is "0x02" ("lp8000").
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This parameter is needed for some specific cases only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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scsi_serialize_io
This parameter controls serialization of the SCSI requests.
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This parameter is needed for some specific cases only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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scsi_max_queue_depth
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| Note |
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This parameter is needed for some specific cases only, so it is strongly recommended not to specify any value without particular instructions from Stromasys. |
Example:
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