diff options
| author | Sagi Grimberg <sagi@grimberg.me> | 2020-02-07 17:13:54 -0800 |
|---|---|---|
| committer | Keith Busch <kbusch@kernel.org> | 2020-03-26 04:45:12 +0900 |
| commit | 45fb19f766d94a642cd820fe523ac29f502eece2 (patch) | |
| tree | 894c15164fb3721057de06df79eb836ea42811d4 /drivers/nvme | |
| parent | 76171c6cdf832bc18b6d8207c9be94d78e54ed09 (diff) | |
nvme: expose hostid via sysfs for fabrics controllers
We allow userspace to connect with a custom hostid which is useful for
certain use-cases. However there is is no way to tell what is the hostid
used to connect to a given controller.
Expose this so userspace can correlate controllers based on hostid.
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/host/core.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/nvme/host/core.c b/drivers/nvme/host/core.c index 4633acc0e68f..720840ca875c 100644 --- a/drivers/nvme/host/core.c +++ b/drivers/nvme/host/core.c @@ -3252,6 +3252,16 @@ static ssize_t nvme_sysfs_show_hostnqn(struct device *dev, } static DEVICE_ATTR(hostnqn, S_IRUGO, nvme_sysfs_show_hostnqn, NULL); +static ssize_t nvme_sysfs_show_hostid(struct device *dev, + struct device_attribute *attr, + char *buf) +{ + struct nvme_ctrl *ctrl = dev_get_drvdata(dev); + + return snprintf(buf, PAGE_SIZE, "%pU\n", &ctrl->opts->host->id); +} +static DEVICE_ATTR(hostid, S_IRUGO, nvme_sysfs_show_hostid, NULL); + static ssize_t nvme_sysfs_show_address(struct device *dev, struct device_attribute *attr, char *buf) @@ -3278,6 +3288,7 @@ static struct attribute *nvme_dev_attrs[] = { &dev_attr_queue_count.attr, &dev_attr_sqsize.attr, &dev_attr_hostnqn.attr, + &dev_attr_hostid.attr, NULL }; @@ -3293,6 +3304,8 @@ static umode_t nvme_dev_attrs_are_visible(struct kobject *kobj, return 0; if (a == &dev_attr_hostnqn.attr && !ctrl->opts) return 0; + if (a == &dev_attr_hostid.attr && !ctrl->opts) + return 0; return a->mode; } |