diff options
| author | Vikas Chaudhary <vikas.chaudhary@qlogic.com> | 2010-04-28 11:38:11 +0530 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@suse.de> | 2010-05-02 15:39:20 -0400 |
| commit | 065aa1b4db63c7fa68a3e889510c4e63404a1ac7 (patch) | |
| tree | 11a19a7faf1ef71d0a8f45f385b87c8235155f64 /drivers/scsi/qla4xxx/ql4_os.c | |
| parent | 2a49a78ed3c8d7c8319595270110c69f99c61a74 (diff) | |
[SCSI] qla4xxx: set device state as per Link UP and LINK DOWN
Link Down -> Mark all devices missing
Previously, the driver took no action on a Link Down,
and waited for the I/O on a dead connection to timeout
in the firmware before marking the DDB missing.
Link Up -> Mark all devices online
F/W will do auto login to all the devices only once.
After that its the responsibility of the driver to
relogin to devices whenever there is :
* Any sort of connection failure or
* KATO expires indicating target has logged out or
* I/O times out etc.
Signed-off-by: Vikas Chaudhary <vikas.chaudhary@qlogic.com>
Signed-off-by: Karen Higgins <karen.higgins@qlogic.com>
Signed-off-by: Ravi Anand <ravi.anand@qlogic.com>
Reviewed-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@suse.de>
Diffstat (limited to 'drivers/scsi/qla4xxx/ql4_os.c')
| -rw-r--r-- | drivers/scsi/qla4xxx/ql4_os.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/scsi/qla4xxx/ql4_os.c b/drivers/scsi/qla4xxx/ql4_os.c index 2ccad36bee9..d6c8b429a67 100644 --- a/drivers/scsi/qla4xxx/ql4_os.c +++ b/drivers/scsi/qla4xxx/ql4_os.c @@ -685,6 +685,7 @@ static void qla4xxx_timer(struct scsi_qla_host *ha) test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || + test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) || test_bit(DPC_AEN, &ha->dpc_flags)) && ha->dpc_thread) { DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" @@ -1069,6 +1070,54 @@ static void qla4xxx_do_dpc(struct work_struct *work) if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) qla4xxx_get_dhcp_ip_address(ha); + /* ---- link change? --- */ + if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) { + if (!test_bit(AF_LINK_UP, &ha->flags)) { + /* ---- link down? --- */ + list_for_each_entry_safe(ddb_entry, dtemp, + &ha->ddb_list, list) { + if (atomic_read(&ddb_entry->state) == + DDB_STATE_ONLINE) + qla4xxx_mark_device_missing(ha, + ddb_entry); + } + } else { + /* ---- link up? --- * + * F/W will auto login to all devices ONLY ONCE after + * link up during driver initialization and runtime + * fatal error recovery. Therefore, the driver must + * manually relogin to devices when recovering from + * connection failures, logouts, expired KATO, etc. */ + + list_for_each_entry_safe(ddb_entry, dtemp, + &ha->ddb_list, list) { + if ((atomic_read(&ddb_entry->state) == + DDB_STATE_MISSING) || + (atomic_read(&ddb_entry->state) == + DDB_STATE_DEAD)) { + if (ddb_entry->fw_ddb_device_state == + DDB_DS_SESSION_ACTIVE) { + atomic_set(&ddb_entry->state, + DDB_STATE_ONLINE); + dev_info(&ha->pdev->dev, + "scsi%ld: %s: ddb[%d]" + " os[%d] marked" + " ONLINE\n", + ha->host_no, __func__, + ddb_entry->fw_ddb_index, + ddb_entry->os_target_id); + + iscsi_unblock_session( + ddb_entry->sess); + } else + qla4xxx_relogin_device( + ha, ddb_entry); + } + + } + } + } + /* ---- relogin device? --- */ if (adapter_up(ha) && test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { |