diff options
Diffstat (limited to 'Documentation/scsi')
| -rw-r--r-- | Documentation/scsi/scsi_fc_transport.txt | 126 |
1 files changed, 63 insertions, 63 deletions
diff --git a/Documentation/scsi/scsi_fc_transport.txt b/Documentation/scsi/scsi_fc_transport.txt index ab057afc757..d403e46d846 100644 --- a/Documentation/scsi/scsi_fc_transport.txt +++ b/Documentation/scsi/scsi_fc_transport.txt @@ -119,67 +119,67 @@ Vport Attributes: The new fc_vport class object has the following attributes - node_name: Read_Only + node_name: Read_Only The WWNN of the vport - port_name: Read_Only + port_name: Read_Only The WWPN of the vport - roles: Read_Only + roles: Read_Only Indicates the FC4 roles enabled on the vport. - symbolic_name: Read_Write + symbolic_name: Read_Write A string, appended to the driver's symbolic port name string, which is registered with the switch to identify the vport. For example, a hypervisor could set this string to "Xen Domain 2 VM 5 Vport 2", and this set of identifiers can be seen on switch management screens to identify the port. - vport_delete: Write_Only + vport_delete: Write_Only When written with a "1", will tear down the vport. - vport_disable: Write_Only + vport_disable: Write_Only When written with a "1", will transition the vport to a disabled. state. The vport will still be instantiated with the Linux kernel, but it will not be active on the FC link. When written with a "0", will enable the vport. - vport_last_state: Read_Only + vport_last_state: Read_Only Indicates the previous state of the vport. See the section below on "Vport States". - vport_state: Read_Only + vport_state: Read_Only Indicates the state of the vport. See the section below on "Vport States". - vport_type: Read_Only + vport_type: Read_Only Reflects the FC mechanism used to create the virtual port. Only NPIV is supported currently. For the fc_host class object, the following attributes are added for vports: - max_npiv_vports: Read_Only + max_npiv_vports: Read_Only Indicates the maximum number of NPIV-based vports that the driver/adapter can support on the fc_host. - npiv_vports_inuse: Read_Only + npiv_vports_inuse: Read_Only Indicates how many NPIV-based vports have been instantiated on the fc_host. - vport_create: Write_Only + vport_create: Write_Only A "simple" create interface to instantiate a vport on an fc_host. A "<WWPN>:<WWNN>" string is written to the attribute. The transport then instantiates the vport object and calls the LLDD to create the vport with the role of FCP_Initiator. Each WWN is specified as 16 hex characters and may *not* contain any prefixes (e.g. 0x, x, etc). - vport_delete: Write_Only + vport_delete: Write_Only A "simple" delete interface to teardown a vport. A "<WWPN>:<WWNN>" - string is written to the attribute. The transport will locate the - vport on the fc_host with the same WWNs and tear it down. Each WWN - is specified as 16 hex characters and may *not* contain any prefixes - (e.g. 0x, x, etc). + string is written to the attribute. The transport will locate the + vport on the fc_host with the same WWNs and tear it down. Each WWN + is specified as 16 hex characters and may *not* contain any prefixes + (e.g. 0x, x, etc). Vport States: @@ -198,23 +198,23 @@ Vport States: Once a vport has been instantiated with the kernel/LLDD, a vport state can be reported via the sysfs attribute. The following states exist: - FC_VPORT_UNKNOWN - Unknown + FC_VPORT_UNKNOWN - Unknown An temporary state, typically set only while the vport is being instantiated with the kernel and LLDD. - FC_VPORT_ACTIVE - Active + FC_VPORT_ACTIVE - Active The vport has been successfully been created on the FC link. It is fully functional. - FC_VPORT_DISABLED - Disabled + FC_VPORT_DISABLED - Disabled The vport instantiated, but "disabled". The vport is not instantiated on the FC link. This is equivalent to a physical port with the link "down". - FC_VPORT_LINKDOWN - Linkdown + FC_VPORT_LINKDOWN - Linkdown The vport is not operational as the physical link is not operational. - FC_VPORT_INITIALIZING - Initializing + FC_VPORT_INITIALIZING - Initializing The vport is in the process of instantiating on the FC link. The LLDD will set this state just prior to starting the ELS traffic to create the vport. This state will persist until the vport is @@ -222,65 +222,65 @@ Vport States: (state is one of the values below). As this state is transitory, it will not be preserved in the "vport_last_state". - FC_VPORT_NO_FABRIC_SUPP - No Fabric Support + FC_VPORT_NO_FABRIC_SUPP - No Fabric Support The vport is not operational. One of the following conditions were encountered: - The FC topology is not Point-to-Point - The FC port is not connected to an F_Port - The F_Port has indicated that NPIV is not supported. - FC_VPORT_NO_FABRIC_RSCS - No Fabric Resources + FC_VPORT_NO_FABRIC_RSCS - No Fabric Resources The vport is not operational. The Fabric failed FDISC with a status indicating that it does not have sufficient resources to complete the operation. - FC_VPORT_FABRIC_LOGOUT - Fabric Logout + FC_VPORT_FABRIC_LOGOUT - Fabric Logout The vport is not operational. The Fabric has LOGO'd the N_Port_ID associated with the vport. - FC_VPORT_FABRIC_REJ_WWN - Fabric Rejected WWN + FC_VPORT_FABRIC_REJ_WWN - Fabric Rejected WWN The vport is not operational. The Fabric failed FDISC with a status indicating that the WWN's are not valid. - FC_VPORT_FAILED - VPort Failed + FC_VPORT_FAILED - VPort Failed The vport is not operational. This is a catchall for all other error conditions. The following state table indicates the different state transitions: - State Event New State + State Event New State -------------------------------------------------------------------- - n/a Initialization Unknown - Unknown: Link Down Linkdown - Link Up & Loop No Fabric Support - Link Up & no Fabric No Fabric Support - Link Up & FLOGI response No Fabric Support - indicates no NPIV support - Link Up & FDISC being sent Initializing - Disable request Disable - Linkdown: Link Up Unknown - Initializing: FDISC ACC Active - FDISC LS_RJT w/ no resources No Fabric Resources - FDISC LS_RJT w/ invalid Fabric Rejected WWN - pname or invalid nport_id - FDISC LS_RJT failed for Vport Failed - other reasons - Link Down Linkdown - Disable request Disable - Disable: Enable request Unknown - Active: LOGO received from fabric Fabric Logout - Link Down Linkdown - Disable request Disable - Fabric Logout: Link still up Unknown + n/a Initialization Unknown + Unknown: Link Down Linkdown + Link Up & Loop No Fabric Support + Link Up & no Fabric No Fabric Support + Link Up & FLOGI response No Fabric Support + indicates no NPIV support + Link Up & FDISC being sent Initializing + Disable request Disable + Linkdown: Link Up Unknown + Initializing: FDISC ACC Active + FDISC LS_RJT w/ no resources No Fabric Resources + FDISC LS_RJT w/ invalid Fabric Rejected WWN + pname or invalid nport_id + FDISC LS_RJT failed for Vport Failed + other reasons + Link Down Linkdown + Disable request Disable + Disable: Enable request Unknown + Active: LOGO received from fabric Fabric Logout + Link Down Linkdown + Disable request Disable + Fabric Logout: Link still up Unknown The following 4 error states all have the same transitions: No Fabric Support: No Fabric Resources: Fabric Rejected WWN: Vport Failed: - Disable request Disable - Link goes down Linkdown + Disable request Disable + Link goes down Linkdown Transport <-> LLDD Interfaces : @@ -303,9 +303,9 @@ Vport Creation: int vport_create(struct fc_vport *vport, bool disable) where: - vport: Is the newly allocated vport object - disable: If "true", the vport is to be created in a disabled stated. - If "false", the vport is to be enabled upon creation. + vport: Is the newly allocated vport object + disable: If "true", the vport is to be created in a disabled stated. + If "false", the vport is to be enabled upon creation. When a request is made to create a new vport (via sgio/netlink, or the vport_create fc_host attribute), the transport will validate that the LLDD @@ -342,7 +342,7 @@ Vport Creation: - Validate Infrastructure: - If the driver or adapter cannot support another vport, whether due to improper firmware, (a lie about) max_npiv, or a lack of - some other resource - return VPCERR_UNSUPPORTED. + some other resource - return VPCERR_UNSUPPORTED. - If the driver validates the WWN's against those already active on the adapter and detects an overlap - return VPCERR_BAD_WWN. - If the driver detects the topology is loop, non-fabric, or the @@ -351,9 +351,9 @@ Vport Creation: of memory conditions, return the respective negative Exxx error code. - If the role is FCP Initiator, the LLDD is to : - Call scsi_host_alloc() to allocate a scsi_host for the vport. - - Call scsi_add_host(new_shost, &vport->dev) to start the scsi_host - and bind it as a child of the vport device. - - Initializes the fc_host attribute values. + - Call scsi_add_host(new_shost, &vport->dev) to start the scsi_host + and bind it as a child of the vport device. + - Initializes the fc_host attribute values. - Kick of further vport state transitions based on the disable flag and link state - and return success (zero). @@ -376,9 +376,9 @@ Vport Disable/Enable: int vport_disable(struct fc_vport *vport, bool disable) where: - vport: Is vport to to be enabled or disabled - disable: If "true", the vport is to be disabled. - If "false", the vport is to be enabled. + vport: Is vport to to be enabled or disabled + disable: If "true", the vport is to be disabled. + If "false", the vport is to be enabled. When a request is made to change the disabled state on a vport, the transport will validate the request against the existing vport state. @@ -404,7 +404,7 @@ Vport Deletion: int vport_delete(struct fc_vport *vport) where: - vport: Is vport to delete + vport: Is vport to delete When a request is made to delete a vport (via sgio/netlink, or via the fc_host or fc_vport vport_delete attributes), the transport will call |