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ib_srpt: Add link_layer and port_id sysfs attributes

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@6897 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2016-06-09 21:03:34 +00:00
parent 0556c29fdd
commit 1b8ba2f3cb
2 changed files with 99 additions and 2 deletions
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srpt/src/ib_srpt.c
+97 -2
View File
@@ -90,7 +90,7 @@
#define SRPT_PROC_TRACE_LEVEL_NAME "trace_level"
#endif
#define SRPT_ID_STRING "SCST SRP target"
#define DEFAULT_SRPT_ID_STRING "SCST SRP target"
MODULE_AUTHOR("Vu Pham and Bart Van Assche");
MODULE_DESCRIPTION("InfiniBand SCSI RDMA Protocol target "
@@ -484,7 +484,7 @@ static void srpt_get_ioc(struct srpt_port *sport, u32 slot,
send_queue_depth = min(SRPT_RQ_SIZE, sdev->dev_attr.max_qp_wr);
memset(iocp, 0, sizeof(*iocp));
strcpy(iocp->id_string, SRPT_ID_STRING);
strcpy(iocp->id_string, DEFAULT_SRPT_ID_STRING);
iocp->guid = cpu_to_be64(srpt_service_guid);
iocp->vendor_id = cpu_to_be32(sdev->dev_attr.vendor_id);
iocp->device_id = cpu_to_be32(sdev->dev_attr.vendor_part_id);
@@ -4039,6 +4039,99 @@ out:
static struct kobj_attribute srpt_device_attr =
__ATTR(device, S_IRUGO, srpt_show_device, NULL);
/*
* The link layer names in this function match those used by the IB core.
* See also link_layer_show() in drivers/infiniband/core/sysfs.c
*/
static ssize_t srpt_show_link_layer(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct scst_tgt *scst_tgt = container_of(kobj, struct scst_tgt,
tgt_kobj);
struct srpt_port *sport = scst_tgt_get_tgt_priv(scst_tgt);
const char *lln = "Unknown";
int res = -E_TGT_PRIV_NOT_YET_SET;
if (!sport)
goto out;
#if LINUX_VERSION_CODE >= KERNEL_VERSION(2, 6, 37) /* commit a3f5adaf4 */
switch (rdma_port_get_link_layer(sport->sdev->device, sport->port)) {
case IB_LINK_LAYER_INFINIBAND:
lln = "InfiniBand";
break;
case IB_LINK_LAYER_ETHERNET:
lln = "Ethernet";
break;
case IB_LINK_LAYER_UNSPECIFIED:
default:
break;
}
#endif
res = sprintf(buf, "%s\n", lln);
out:
return res;
}
static struct kobj_attribute srpt_link_layer_attr =
__ATTR(link_layer, S_IRUGO, srpt_show_link_layer, NULL);
static ssize_t show_port_id(struct kobject *kobj, struct kobj_attribute *attr,
char *buf)
{
struct scst_tgt *scst_tgt = container_of(kobj, struct scst_tgt,
tgt_kobj);
struct srpt_port *sport = scst_tgt_get_tgt_priv(scst_tgt);
int res = -E_TGT_PRIV_NOT_YET_SET;
if (!sport)
goto out;
mutex_lock(&sport->mutex);
snprintf(buf, PAGE_SIZE, "%s\n%s", sport->port_id,
strcmp(sport->port_id, DEFAULT_SRPT_ID_STRING) ?
SCST_SYSFS_KEY_MARK "\n" : "");
mutex_unlock(&sport->mutex);
res = strlen(buf);
out:
return res;
}
static ssize_t store_port_id(struct kobject *kobj, struct kobj_attribute *attr,
const char *buf, size_t count)
{
struct scst_tgt *scst_tgt = container_of(kobj, struct scst_tgt,
tgt_kobj);
struct srpt_port *sport = scst_tgt_get_tgt_priv(scst_tgt);
const char *end;
int res = -E_TGT_PRIV_NOT_YET_SET;
if (!sport)
goto out;
end = buf + count;
while (end > buf && isspace(((unsigned char *)end)[-1]))
--end;
res = -E2BIG;
if (end - buf >= sizeof(sport->port_id))
goto out;
mutex_lock(&sport->mutex);
sprintf(sport->port_id, "%.*s", (int)(end - buf), buf);
mutex_unlock(&sport->mutex);
res = count;
out:
return res;
}
static struct kobj_attribute srpt_port_id_attr =
__ATTR(port_id, S_IRUGO | S_IWUSR, show_port_id, store_port_id);
static ssize_t show_login_info(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
@@ -4075,6 +4168,8 @@ static struct kobj_attribute srpt_show_login_info_attr =
static const struct attribute *srpt_tgt_attrs[] = {
&srpt_show_comp_v_mask_attr.attr,
&srpt_device_attr.attr,
&srpt_link_layer_attr.attr,
&srpt_port_id_attr.attr,
&srpt_show_login_info_attr.attr,
NULL
};
srpt/src/ib_srpt.h
+2
View File
@@ -419,6 +419,7 @@ struct srpt_nexus {
* @comp_v_mask: Bitmask with one bit per allowed completion vector.
* @comp_vector: Completion vector from where searching will start.
* @enabled: Whether or not this SCST target is enabled.
* @port_id: ID String reported in IOControllerProfile replies.
*/
struct srpt_port {
struct srpt_device *sdev;
@@ -435,6 +436,7 @@ struct srpt_port {
cpumask_t comp_v_mask;
u8 comp_vector;
bool enabled;
u8 port_id[64];
};
/**