5a0e3ad6af
percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
680 lines
19 KiB
C
680 lines
19 KiB
C
/*
|
|
* zfcp device driver
|
|
*
|
|
* Interface to Linux SCSI midlayer.
|
|
*
|
|
* Copyright IBM Corporation 2002, 2010
|
|
*/
|
|
|
|
#define KMSG_COMPONENT "zfcp"
|
|
#define pr_fmt(fmt) KMSG_COMPONENT ": " fmt
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/slab.h>
|
|
#include <scsi/fc/fc_fcp.h>
|
|
#include <asm/atomic.h>
|
|
#include "zfcp_ext.h"
|
|
#include "zfcp_dbf.h"
|
|
#include "zfcp_fc.h"
|
|
#include "zfcp_reqlist.h"
|
|
|
|
static unsigned int default_depth = 32;
|
|
module_param_named(queue_depth, default_depth, uint, 0600);
|
|
MODULE_PARM_DESC(queue_depth, "Default queue depth for new SCSI devices");
|
|
|
|
static int zfcp_scsi_change_queue_depth(struct scsi_device *sdev, int depth,
|
|
int reason)
|
|
{
|
|
switch (reason) {
|
|
case SCSI_QDEPTH_DEFAULT:
|
|
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
|
|
break;
|
|
case SCSI_QDEPTH_QFULL:
|
|
scsi_track_queue_full(sdev, depth);
|
|
break;
|
|
case SCSI_QDEPTH_RAMP_UP:
|
|
scsi_adjust_queue_depth(sdev, scsi_get_tag_type(sdev), depth);
|
|
break;
|
|
default:
|
|
return -EOPNOTSUPP;
|
|
}
|
|
return sdev->queue_depth;
|
|
}
|
|
|
|
static void zfcp_scsi_slave_destroy(struct scsi_device *sdpnt)
|
|
{
|
|
struct zfcp_unit *unit = (struct zfcp_unit *) sdpnt->hostdata;
|
|
unit->device = NULL;
|
|
put_device(&unit->dev);
|
|
}
|
|
|
|
static int zfcp_scsi_slave_configure(struct scsi_device *sdp)
|
|
{
|
|
if (sdp->tagged_supported)
|
|
scsi_adjust_queue_depth(sdp, MSG_SIMPLE_TAG, default_depth);
|
|
else
|
|
scsi_adjust_queue_depth(sdp, 0, 1);
|
|
return 0;
|
|
}
|
|
|
|
static void zfcp_scsi_command_fail(struct scsi_cmnd *scpnt, int result)
|
|
{
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *) scpnt->device->host->hostdata[0];
|
|
|
|
set_host_byte(scpnt, result);
|
|
zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
|
|
scpnt->scsi_done(scpnt);
|
|
}
|
|
|
|
static int zfcp_scsi_queuecommand(struct scsi_cmnd *scpnt,
|
|
void (*done) (struct scsi_cmnd *))
|
|
{
|
|
struct zfcp_unit *unit;
|
|
struct zfcp_adapter *adapter;
|
|
int status, scsi_result, ret;
|
|
struct fc_rport *rport = starget_to_rport(scsi_target(scpnt->device));
|
|
|
|
/* reset the status for this request */
|
|
scpnt->result = 0;
|
|
scpnt->host_scribble = NULL;
|
|
scpnt->scsi_done = done;
|
|
|
|
/*
|
|
* figure out adapter and target device
|
|
* (stored there by zfcp_scsi_slave_alloc)
|
|
*/
|
|
adapter = (struct zfcp_adapter *) scpnt->device->host->hostdata[0];
|
|
unit = scpnt->device->hostdata;
|
|
|
|
scsi_result = fc_remote_port_chkready(rport);
|
|
if (unlikely(scsi_result)) {
|
|
scpnt->result = scsi_result;
|
|
zfcp_dbf_scsi_fail_send(adapter->dbf, scpnt);
|
|
scpnt->scsi_done(scpnt);
|
|
return 0;
|
|
}
|
|
|
|
status = atomic_read(&unit->status);
|
|
if (unlikely(status & ZFCP_STATUS_COMMON_ERP_FAILED) &&
|
|
!(atomic_read(&unit->port->status) &
|
|
ZFCP_STATUS_COMMON_ERP_FAILED)) {
|
|
/* only unit access denied, but port is good
|
|
* not covered by FC transport, have to fail here */
|
|
zfcp_scsi_command_fail(scpnt, DID_ERROR);
|
|
return 0;
|
|
}
|
|
|
|
if (unlikely(!(status & ZFCP_STATUS_COMMON_UNBLOCKED))) {
|
|
/* This could be either
|
|
* open unit pending: this is temporary, will result in
|
|
* open unit or ERP_FAILED, so retry command
|
|
* call to rport_delete pending: mimic retry from
|
|
* fc_remote_port_chkready until rport is BLOCKED
|
|
*/
|
|
zfcp_scsi_command_fail(scpnt, DID_IMM_RETRY);
|
|
return 0;
|
|
}
|
|
|
|
ret = zfcp_fsf_send_fcp_command_task(unit, scpnt);
|
|
if (unlikely(ret == -EBUSY))
|
|
return SCSI_MLQUEUE_DEVICE_BUSY;
|
|
else if (unlikely(ret < 0))
|
|
return SCSI_MLQUEUE_HOST_BUSY;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static struct zfcp_unit *zfcp_unit_lookup(struct zfcp_adapter *adapter,
|
|
unsigned int id, u64 lun)
|
|
{
|
|
unsigned long flags;
|
|
struct zfcp_port *port;
|
|
struct zfcp_unit *unit = NULL;
|
|
|
|
read_lock_irqsave(&adapter->port_list_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list, list) {
|
|
if (!port->rport || (id != port->rport->scsi_target_id))
|
|
continue;
|
|
unit = zfcp_get_unit_by_lun(port, lun);
|
|
if (unit)
|
|
break;
|
|
}
|
|
read_unlock_irqrestore(&adapter->port_list_lock, flags);
|
|
|
|
return unit;
|
|
}
|
|
|
|
static int zfcp_scsi_slave_alloc(struct scsi_device *sdp)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct zfcp_unit *unit;
|
|
u64 lun;
|
|
|
|
adapter = (struct zfcp_adapter *) sdp->host->hostdata[0];
|
|
if (!adapter)
|
|
goto out;
|
|
|
|
int_to_scsilun(sdp->lun, (struct scsi_lun *)&lun);
|
|
unit = zfcp_unit_lookup(adapter, sdp->id, lun);
|
|
if (unit) {
|
|
sdp->hostdata = unit;
|
|
unit->device = sdp;
|
|
return 0;
|
|
}
|
|
out:
|
|
return -ENXIO;
|
|
}
|
|
|
|
static int zfcp_scsi_eh_abort_handler(struct scsi_cmnd *scpnt)
|
|
{
|
|
struct Scsi_Host *scsi_host = scpnt->device->host;
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *) scsi_host->hostdata[0];
|
|
struct zfcp_unit *unit = scpnt->device->hostdata;
|
|
struct zfcp_fsf_req *old_req, *abrt_req;
|
|
unsigned long flags;
|
|
unsigned long old_reqid = (unsigned long) scpnt->host_scribble;
|
|
int retval = SUCCESS;
|
|
int retry = 3;
|
|
char *dbf_tag;
|
|
|
|
/* avoid race condition between late normal completion and abort */
|
|
write_lock_irqsave(&adapter->abort_lock, flags);
|
|
|
|
old_req = zfcp_reqlist_find(adapter->req_list, old_reqid);
|
|
if (!old_req) {
|
|
write_unlock_irqrestore(&adapter->abort_lock, flags);
|
|
zfcp_dbf_scsi_abort("lte1", adapter->dbf, scpnt, NULL,
|
|
old_reqid);
|
|
return FAILED; /* completion could be in progress */
|
|
}
|
|
old_req->data = NULL;
|
|
|
|
/* don't access old fsf_req after releasing the abort_lock */
|
|
write_unlock_irqrestore(&adapter->abort_lock, flags);
|
|
|
|
while (retry--) {
|
|
abrt_req = zfcp_fsf_abort_fcp_command(old_reqid, unit);
|
|
if (abrt_req)
|
|
break;
|
|
|
|
zfcp_erp_wait(adapter);
|
|
fc_block_scsi_eh(scpnt);
|
|
if (!(atomic_read(&adapter->status) &
|
|
ZFCP_STATUS_COMMON_RUNNING)) {
|
|
zfcp_dbf_scsi_abort("nres", adapter->dbf, scpnt, NULL,
|
|
old_reqid);
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
if (!abrt_req)
|
|
return FAILED;
|
|
|
|
wait_for_completion(&abrt_req->completion);
|
|
|
|
if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTSUCCEEDED)
|
|
dbf_tag = "okay";
|
|
else if (abrt_req->status & ZFCP_STATUS_FSFREQ_ABORTNOTNEEDED)
|
|
dbf_tag = "lte2";
|
|
else {
|
|
dbf_tag = "fail";
|
|
retval = FAILED;
|
|
}
|
|
zfcp_dbf_scsi_abort(dbf_tag, adapter->dbf, scpnt, abrt_req, old_reqid);
|
|
zfcp_fsf_req_free(abrt_req);
|
|
return retval;
|
|
}
|
|
|
|
static int zfcp_task_mgmt_function(struct scsi_cmnd *scpnt, u8 tm_flags)
|
|
{
|
|
struct zfcp_unit *unit = scpnt->device->hostdata;
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
|
struct zfcp_fsf_req *fsf_req = NULL;
|
|
int retval = SUCCESS;
|
|
int retry = 3;
|
|
|
|
while (retry--) {
|
|
fsf_req = zfcp_fsf_send_fcp_ctm(unit, tm_flags);
|
|
if (fsf_req)
|
|
break;
|
|
|
|
zfcp_erp_wait(adapter);
|
|
fc_block_scsi_eh(scpnt);
|
|
if (!(atomic_read(&adapter->status) &
|
|
ZFCP_STATUS_COMMON_RUNNING)) {
|
|
zfcp_dbf_scsi_devreset("nres", tm_flags, unit, scpnt);
|
|
return SUCCESS;
|
|
}
|
|
}
|
|
if (!fsf_req)
|
|
return FAILED;
|
|
|
|
wait_for_completion(&fsf_req->completion);
|
|
|
|
if (fsf_req->status & ZFCP_STATUS_FSFREQ_TMFUNCFAILED) {
|
|
zfcp_dbf_scsi_devreset("fail", tm_flags, unit, scpnt);
|
|
retval = FAILED;
|
|
} else
|
|
zfcp_dbf_scsi_devreset("okay", tm_flags, unit, scpnt);
|
|
|
|
zfcp_fsf_req_free(fsf_req);
|
|
return retval;
|
|
}
|
|
|
|
static int zfcp_scsi_eh_device_reset_handler(struct scsi_cmnd *scpnt)
|
|
{
|
|
return zfcp_task_mgmt_function(scpnt, FCP_TMF_LUN_RESET);
|
|
}
|
|
|
|
static int zfcp_scsi_eh_target_reset_handler(struct scsi_cmnd *scpnt)
|
|
{
|
|
return zfcp_task_mgmt_function(scpnt, FCP_TMF_TGT_RESET);
|
|
}
|
|
|
|
static int zfcp_scsi_eh_host_reset_handler(struct scsi_cmnd *scpnt)
|
|
{
|
|
struct zfcp_unit *unit = scpnt->device->hostdata;
|
|
struct zfcp_adapter *adapter = unit->port->adapter;
|
|
|
|
zfcp_erp_adapter_reopen(adapter, 0, "schrh_1", scpnt);
|
|
zfcp_erp_wait(adapter);
|
|
fc_block_scsi_eh(scpnt);
|
|
|
|
return SUCCESS;
|
|
}
|
|
|
|
int zfcp_adapter_scsi_register(struct zfcp_adapter *adapter)
|
|
{
|
|
struct ccw_dev_id dev_id;
|
|
|
|
if (adapter->scsi_host)
|
|
return 0;
|
|
|
|
ccw_device_get_id(adapter->ccw_device, &dev_id);
|
|
/* register adapter as SCSI host with mid layer of SCSI stack */
|
|
adapter->scsi_host = scsi_host_alloc(&zfcp_data.scsi_host_template,
|
|
sizeof (struct zfcp_adapter *));
|
|
if (!adapter->scsi_host) {
|
|
dev_err(&adapter->ccw_device->dev,
|
|
"Registering the FCP device with the "
|
|
"SCSI stack failed\n");
|
|
return -EIO;
|
|
}
|
|
|
|
/* tell the SCSI stack some characteristics of this adapter */
|
|
adapter->scsi_host->max_id = 1;
|
|
adapter->scsi_host->max_lun = 1;
|
|
adapter->scsi_host->max_channel = 0;
|
|
adapter->scsi_host->unique_id = dev_id.devno;
|
|
adapter->scsi_host->max_cmd_len = 16; /* in struct fcp_cmnd */
|
|
adapter->scsi_host->transportt = zfcp_data.scsi_transport_template;
|
|
|
|
adapter->scsi_host->hostdata[0] = (unsigned long) adapter;
|
|
|
|
if (scsi_add_host(adapter->scsi_host, &adapter->ccw_device->dev)) {
|
|
scsi_host_put(adapter->scsi_host);
|
|
return -EIO;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void zfcp_adapter_scsi_unregister(struct zfcp_adapter *adapter)
|
|
{
|
|
struct Scsi_Host *shost;
|
|
struct zfcp_port *port;
|
|
|
|
shost = adapter->scsi_host;
|
|
if (!shost)
|
|
return;
|
|
|
|
read_lock_irq(&adapter->port_list_lock);
|
|
list_for_each_entry(port, &adapter->port_list, list)
|
|
port->rport = NULL;
|
|
read_unlock_irq(&adapter->port_list_lock);
|
|
|
|
fc_remove_host(shost);
|
|
scsi_remove_host(shost);
|
|
scsi_host_put(shost);
|
|
adapter->scsi_host = NULL;
|
|
|
|
return;
|
|
}
|
|
|
|
static struct fc_host_statistics*
|
|
zfcp_init_fc_host_stats(struct zfcp_adapter *adapter)
|
|
{
|
|
struct fc_host_statistics *fc_stats;
|
|
|
|
if (!adapter->fc_stats) {
|
|
fc_stats = kmalloc(sizeof(*fc_stats), GFP_KERNEL);
|
|
if (!fc_stats)
|
|
return NULL;
|
|
adapter->fc_stats = fc_stats; /* freed in adapter_release */
|
|
}
|
|
memset(adapter->fc_stats, 0, sizeof(*adapter->fc_stats));
|
|
return adapter->fc_stats;
|
|
}
|
|
|
|
static void zfcp_adjust_fc_host_stats(struct fc_host_statistics *fc_stats,
|
|
struct fsf_qtcb_bottom_port *data,
|
|
struct fsf_qtcb_bottom_port *old)
|
|
{
|
|
fc_stats->seconds_since_last_reset =
|
|
data->seconds_since_last_reset - old->seconds_since_last_reset;
|
|
fc_stats->tx_frames = data->tx_frames - old->tx_frames;
|
|
fc_stats->tx_words = data->tx_words - old->tx_words;
|
|
fc_stats->rx_frames = data->rx_frames - old->rx_frames;
|
|
fc_stats->rx_words = data->rx_words - old->rx_words;
|
|
fc_stats->lip_count = data->lip - old->lip;
|
|
fc_stats->nos_count = data->nos - old->nos;
|
|
fc_stats->error_frames = data->error_frames - old->error_frames;
|
|
fc_stats->dumped_frames = data->dumped_frames - old->dumped_frames;
|
|
fc_stats->link_failure_count = data->link_failure - old->link_failure;
|
|
fc_stats->loss_of_sync_count = data->loss_of_sync - old->loss_of_sync;
|
|
fc_stats->loss_of_signal_count =
|
|
data->loss_of_signal - old->loss_of_signal;
|
|
fc_stats->prim_seq_protocol_err_count =
|
|
data->psp_error_counts - old->psp_error_counts;
|
|
fc_stats->invalid_tx_word_count =
|
|
data->invalid_tx_words - old->invalid_tx_words;
|
|
fc_stats->invalid_crc_count = data->invalid_crcs - old->invalid_crcs;
|
|
fc_stats->fcp_input_requests =
|
|
data->input_requests - old->input_requests;
|
|
fc_stats->fcp_output_requests =
|
|
data->output_requests - old->output_requests;
|
|
fc_stats->fcp_control_requests =
|
|
data->control_requests - old->control_requests;
|
|
fc_stats->fcp_input_megabytes = data->input_mb - old->input_mb;
|
|
fc_stats->fcp_output_megabytes = data->output_mb - old->output_mb;
|
|
}
|
|
|
|
static void zfcp_set_fc_host_stats(struct fc_host_statistics *fc_stats,
|
|
struct fsf_qtcb_bottom_port *data)
|
|
{
|
|
fc_stats->seconds_since_last_reset = data->seconds_since_last_reset;
|
|
fc_stats->tx_frames = data->tx_frames;
|
|
fc_stats->tx_words = data->tx_words;
|
|
fc_stats->rx_frames = data->rx_frames;
|
|
fc_stats->rx_words = data->rx_words;
|
|
fc_stats->lip_count = data->lip;
|
|
fc_stats->nos_count = data->nos;
|
|
fc_stats->error_frames = data->error_frames;
|
|
fc_stats->dumped_frames = data->dumped_frames;
|
|
fc_stats->link_failure_count = data->link_failure;
|
|
fc_stats->loss_of_sync_count = data->loss_of_sync;
|
|
fc_stats->loss_of_signal_count = data->loss_of_signal;
|
|
fc_stats->prim_seq_protocol_err_count = data->psp_error_counts;
|
|
fc_stats->invalid_tx_word_count = data->invalid_tx_words;
|
|
fc_stats->invalid_crc_count = data->invalid_crcs;
|
|
fc_stats->fcp_input_requests = data->input_requests;
|
|
fc_stats->fcp_output_requests = data->output_requests;
|
|
fc_stats->fcp_control_requests = data->control_requests;
|
|
fc_stats->fcp_input_megabytes = data->input_mb;
|
|
fc_stats->fcp_output_megabytes = data->output_mb;
|
|
}
|
|
|
|
static struct fc_host_statistics *zfcp_get_fc_host_stats(struct Scsi_Host *host)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fc_host_statistics *fc_stats;
|
|
struct fsf_qtcb_bottom_port *data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)host->hostdata[0];
|
|
fc_stats = zfcp_init_fc_host_stats(adapter);
|
|
if (!fc_stats)
|
|
return NULL;
|
|
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return NULL;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
|
if (ret) {
|
|
kfree(data);
|
|
return NULL;
|
|
}
|
|
|
|
if (adapter->stats_reset &&
|
|
((jiffies/HZ - adapter->stats_reset) <
|
|
data->seconds_since_last_reset))
|
|
zfcp_adjust_fc_host_stats(fc_stats, data,
|
|
adapter->stats_reset_data);
|
|
else
|
|
zfcp_set_fc_host_stats(fc_stats, data);
|
|
|
|
kfree(data);
|
|
return fc_stats;
|
|
}
|
|
|
|
static void zfcp_reset_fc_host_stats(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter;
|
|
struct fsf_qtcb_bottom_port *data;
|
|
int ret;
|
|
|
|
adapter = (struct zfcp_adapter *)shost->hostdata[0];
|
|
data = kzalloc(sizeof(*data), GFP_KERNEL);
|
|
if (!data)
|
|
return;
|
|
|
|
ret = zfcp_fsf_exchange_port_data_sync(adapter->qdio, data);
|
|
if (ret)
|
|
kfree(data);
|
|
else {
|
|
adapter->stats_reset = jiffies/HZ;
|
|
kfree(adapter->stats_reset_data);
|
|
adapter->stats_reset_data = data; /* finally freed in
|
|
adapter_release */
|
|
}
|
|
}
|
|
|
|
static void zfcp_get_host_port_state(struct Scsi_Host *shost)
|
|
{
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
|
int status = atomic_read(&adapter->status);
|
|
|
|
if ((status & ZFCP_STATUS_COMMON_RUNNING) &&
|
|
!(status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED))
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ONLINE;
|
|
else if (status & ZFCP_STATUS_ADAPTER_LINK_UNPLUGGED)
|
|
fc_host_port_state(shost) = FC_PORTSTATE_LINKDOWN;
|
|
else if (status & ZFCP_STATUS_COMMON_ERP_FAILED)
|
|
fc_host_port_state(shost) = FC_PORTSTATE_ERROR;
|
|
else
|
|
fc_host_port_state(shost) = FC_PORTSTATE_UNKNOWN;
|
|
}
|
|
|
|
static void zfcp_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
|
|
{
|
|
rport->dev_loss_tmo = timeout;
|
|
}
|
|
|
|
/**
|
|
* zfcp_scsi_terminate_rport_io - Terminate all I/O on a rport
|
|
* @rport: The FC rport where to teminate I/O
|
|
*
|
|
* Abort all pending SCSI commands for a port by closing the
|
|
* port. Using a reopen avoiding a conflict with a shutdown
|
|
* overwriting a reopen.
|
|
*/
|
|
static void zfcp_scsi_terminate_rport_io(struct fc_rport *rport)
|
|
{
|
|
struct zfcp_port *port;
|
|
struct Scsi_Host *shost = rport_to_shost(rport);
|
|
struct zfcp_adapter *adapter =
|
|
(struct zfcp_adapter *)shost->hostdata[0];
|
|
|
|
port = zfcp_get_port_by_wwpn(adapter, rport->port_name);
|
|
|
|
if (port) {
|
|
zfcp_erp_port_reopen(port, 0, "sctrpi1", NULL);
|
|
put_device(&port->dev);
|
|
}
|
|
}
|
|
|
|
static void zfcp_scsi_rport_register(struct zfcp_port *port)
|
|
{
|
|
struct fc_rport_identifiers ids;
|
|
struct fc_rport *rport;
|
|
|
|
if (port->rport)
|
|
return;
|
|
|
|
ids.node_name = port->wwnn;
|
|
ids.port_name = port->wwpn;
|
|
ids.port_id = port->d_id;
|
|
ids.roles = FC_RPORT_ROLE_FCP_TARGET;
|
|
|
|
rport = fc_remote_port_add(port->adapter->scsi_host, 0, &ids);
|
|
if (!rport) {
|
|
dev_err(&port->adapter->ccw_device->dev,
|
|
"Registering port 0x%016Lx failed\n",
|
|
(unsigned long long)port->wwpn);
|
|
return;
|
|
}
|
|
|
|
rport->maxframe_size = port->maxframe_size;
|
|
rport->supported_classes = port->supported_classes;
|
|
port->rport = rport;
|
|
}
|
|
|
|
static void zfcp_scsi_rport_block(struct zfcp_port *port)
|
|
{
|
|
struct fc_rport *rport = port->rport;
|
|
|
|
if (rport) {
|
|
fc_remote_port_delete(rport);
|
|
port->rport = NULL;
|
|
}
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rport_register(struct zfcp_port *port)
|
|
{
|
|
get_device(&port->dev);
|
|
port->rport_task = RPORT_ADD;
|
|
|
|
if (!queue_work(port->adapter->work_queue, &port->rport_work))
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rport_block(struct zfcp_port *port)
|
|
{
|
|
get_device(&port->dev);
|
|
port->rport_task = RPORT_DEL;
|
|
|
|
if (port->rport && queue_work(port->adapter->work_queue,
|
|
&port->rport_work))
|
|
return;
|
|
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
void zfcp_scsi_schedule_rports_block(struct zfcp_adapter *adapter)
|
|
{
|
|
unsigned long flags;
|
|
struct zfcp_port *port;
|
|
|
|
read_lock_irqsave(&adapter->port_list_lock, flags);
|
|
list_for_each_entry(port, &adapter->port_list, list)
|
|
zfcp_scsi_schedule_rport_block(port);
|
|
read_unlock_irqrestore(&adapter->port_list_lock, flags);
|
|
}
|
|
|
|
void zfcp_scsi_rport_work(struct work_struct *work)
|
|
{
|
|
struct zfcp_port *port = container_of(work, struct zfcp_port,
|
|
rport_work);
|
|
|
|
while (port->rport_task) {
|
|
if (port->rport_task == RPORT_ADD) {
|
|
port->rport_task = RPORT_NONE;
|
|
zfcp_scsi_rport_register(port);
|
|
} else {
|
|
port->rport_task = RPORT_NONE;
|
|
zfcp_scsi_rport_block(port);
|
|
}
|
|
}
|
|
|
|
put_device(&port->dev);
|
|
}
|
|
|
|
|
|
void zfcp_scsi_scan(struct work_struct *work)
|
|
{
|
|
struct zfcp_unit *unit = container_of(work, struct zfcp_unit,
|
|
scsi_work);
|
|
struct fc_rport *rport;
|
|
|
|
flush_work(&unit->port->rport_work);
|
|
rport = unit->port->rport;
|
|
|
|
if (rport && rport->port_state == FC_PORTSTATE_ONLINE)
|
|
scsi_scan_target(&rport->dev, 0, rport->scsi_target_id,
|
|
scsilun_to_int((struct scsi_lun *)
|
|
&unit->fcp_lun), 0);
|
|
|
|
put_device(&unit->dev);
|
|
}
|
|
|
|
struct fc_function_template zfcp_transport_functions = {
|
|
.show_starget_port_id = 1,
|
|
.show_starget_port_name = 1,
|
|
.show_starget_node_name = 1,
|
|
.show_rport_supported_classes = 1,
|
|
.show_rport_maxframe_size = 1,
|
|
.show_rport_dev_loss_tmo = 1,
|
|
.show_host_node_name = 1,
|
|
.show_host_port_name = 1,
|
|
.show_host_permanent_port_name = 1,
|
|
.show_host_supported_classes = 1,
|
|
.show_host_supported_fc4s = 1,
|
|
.show_host_supported_speeds = 1,
|
|
.show_host_maxframe_size = 1,
|
|
.show_host_serial_number = 1,
|
|
.get_fc_host_stats = zfcp_get_fc_host_stats,
|
|
.reset_fc_host_stats = zfcp_reset_fc_host_stats,
|
|
.set_rport_dev_loss_tmo = zfcp_set_rport_dev_loss_tmo,
|
|
.get_host_port_state = zfcp_get_host_port_state,
|
|
.terminate_rport_io = zfcp_scsi_terminate_rport_io,
|
|
.show_host_port_state = 1,
|
|
.show_host_active_fc4s = 1,
|
|
.bsg_request = zfcp_fc_exec_bsg_job,
|
|
.bsg_timeout = zfcp_fc_timeout_bsg_job,
|
|
/* no functions registered for following dynamic attributes but
|
|
directly set by LLDD */
|
|
.show_host_port_type = 1,
|
|
.show_host_speed = 1,
|
|
.show_host_port_id = 1,
|
|
.disable_target_scan = 1,
|
|
.dd_bsg_size = sizeof(struct zfcp_fsf_ct_els),
|
|
};
|
|
|
|
struct zfcp_data zfcp_data = {
|
|
.scsi_host_template = {
|
|
.name = "zfcp",
|
|
.module = THIS_MODULE,
|
|
.proc_name = "zfcp",
|
|
.change_queue_depth = zfcp_scsi_change_queue_depth,
|
|
.slave_alloc = zfcp_scsi_slave_alloc,
|
|
.slave_configure = zfcp_scsi_slave_configure,
|
|
.slave_destroy = zfcp_scsi_slave_destroy,
|
|
.queuecommand = zfcp_scsi_queuecommand,
|
|
.eh_abort_handler = zfcp_scsi_eh_abort_handler,
|
|
.eh_device_reset_handler = zfcp_scsi_eh_device_reset_handler,
|
|
.eh_target_reset_handler = zfcp_scsi_eh_target_reset_handler,
|
|
.eh_host_reset_handler = zfcp_scsi_eh_host_reset_handler,
|
|
.can_queue = 4096,
|
|
.this_id = -1,
|
|
.sg_tablesize = ZFCP_MAX_SBALES_PER_REQ,
|
|
.cmd_per_lun = 1,
|
|
.use_clustering = 1,
|
|
.sdev_attrs = zfcp_sysfs_sdev_attrs,
|
|
.max_sectors = (ZFCP_MAX_SBALES_PER_REQ * 8),
|
|
.shost_attrs = zfcp_sysfs_shost_attrs,
|
|
},
|
|
};
|