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[SCSI] libsas: improve debug statements

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It's difficult to determine which domain_device is triggering error recovery,
so convert messages like:

  sas: ex 5001b4da000e703f phy08:T attached: 5001b4da000e7028
  sas: ex 5001b4da000e703f phy09:T attached: 5001b4da000e7029
  ...
  ata7: sas eh calling libata port error handler
  ata8: sas eh calling libata port error handler

...into:

  sas: ex 5001517e85cfefff phy05:T:9 attached: 5001517e85cfefe5 (stp)
  sas: ex 5001517e3b0af0bf phy11:T:8 attached: 5001517e3b0af0ab (stp)
  ...
  sas: ata7: end_device-21:1: dev error handler
  sas: ata8: end_device-20:0:5: dev error handler

which shows attached link rate, device type, and associates a
domain_device with its ata_port id to correlate messages emitted from
libata-eh.

As Doug notes, we can also take the opportunity to clarify expander phy
routing capabilities.

[dgilbert@interlog.com: clarify table2table with 'U']
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
This commit is contained in:
Dan Williams
2012-01-16 11:56:50 -08:00
committed by James Bottomley
parent fdfd9d1b89
commit d214d81e88
2 changed files with 85 additions and 32 deletions
Download Patch File Download Diff File Expand all files Collapse all files

74
drivers/scsi/libsas/sas_expander.c
View File

@ -166,7 +166,22 @@ static inline void *alloc_smp_resp(int size)
return kzalloc(size, GFP_KERNEL);
}
/* ---------- Expander configuration ---------- */
static char sas_route_char(struct domain_device *dev, struct ex_phy *phy)
{
switch (phy->routing_attr) {
case TABLE_ROUTING:
if (dev->ex_dev.t2t_supp)
return 'U';
else
return 'T';
case DIRECT_ROUTING:
return 'D';
case SUBTRACTIVE_ROUTING:
return 'S';
default:
return '?';
}
}
static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
void *disc_resp)
@ -176,9 +191,10 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
struct smp_resp *resp = disc_resp;
struct discover_resp *dr = &resp->disc;
struct sas_rphy *rphy = dev->rphy;
int rediscover = (phy->phy != NULL);
bool new_phy = !phy->phy;
char *type;
if (!rediscover) {
if (new_phy) {
phy->phy = sas_phy_alloc(&rphy->dev, phy_id);
/* FIXME: error_handling */
@ -223,20 +239,41 @@ static void sas_set_ex_phy(struct domain_device *dev, int phy_id,
phy->phy->maximum_linkrate = dr->pmax_linkrate;
phy->phy->negotiated_linkrate = phy->linkrate;
if (!rediscover)
if (new_phy)
if (sas_phy_add(phy->phy)) {
sas_phy_free(phy->phy);
return;
}
SAS_DPRINTK("ex %016llx phy%02d:%c attached: %016llx\n",
SAS_ADDR(dev->sas_addr), phy->phy_id,
phy->routing_attr == TABLE_ROUTING ? 'T' :
phy->routing_attr == DIRECT_ROUTING ? 'D' :
phy->routing_attr == SUBTRACTIVE_ROUTING ? 'S' : '?',
SAS_ADDR(phy->attached_sas_addr));
switch (phy->attached_dev_type) {
case NO_DEVICE:
type = "no device";
break;
case SAS_END_DEV:
if (phy->attached_iproto) {
if (phy->attached_tproto)
type = "host+target";
else
type = "host";
} else {
if (dr->attached_sata_dev)
type = "stp";
else
type = "ssp";
}
break;
case EDGE_DEV:
case FANOUT_DEV:
type = "smp";
break;
default:
type = "unknown";
}
return;
SAS_DPRINTK("ex %016llx phy%02d:%c:%X attached: %016llx (%s)\n",
SAS_ADDR(dev->sas_addr), phy->phy_id,
sas_route_char(dev, phy), phy->linkrate,
SAS_ADDR(phy->attached_sas_addr), type);
}
/* check if we have an existing attached ata device on this expander phy */
@ -1176,32 +1213,25 @@ static void sas_print_parent_topology_bug(struct domain_device *child,
struct ex_phy *parent_phy,
struct ex_phy *child_phy)
{
static const char ra_char[] = {
[DIRECT_ROUTING] = 'D',
[SUBTRACTIVE_ROUTING] = 'S',
[TABLE_ROUTING] = 'T',
};
static const char *ex_type[] = {
[EDGE_DEV] = "edge",
[FANOUT_DEV] = "fanout",
};
struct domain_device *parent = child->parent;
sas_printk("%s ex %016llx (T2T supp:%d) phy 0x%x <--> %s ex %016llx "
"(T2T supp:%d) phy 0x%x has %c:%c routing link!\n",
sas_printk("%s ex %016llx phy 0x%x <--> %s ex %016llx "
"phy 0x%x has %c:%c routing link!\n",
ex_type[parent->dev_type],
SAS_ADDR(parent->sas_addr),
parent->ex_dev.t2t_supp,
parent_phy->phy_id,
ex_type[child->dev_type],
SAS_ADDR(child->sas_addr),
child->ex_dev.t2t_supp,
child_phy->phy_id,
ra_char[parent_phy->routing_attr],
ra_char[child_phy->routing_attr]);
sas_route_char(parent, parent_phy),
sas_route_char(child, child_phy));
}
static int sas_check_eeds(struct domain_device *child,