rbd: add 'client_addr' sysfs rbd device attribute

Export client addr/nonce, so userspace can check if a image is being
blacklisted.

Signed-off-by: Mike Christie <mchristi@redhat.com>
[idryomov@gmail.com: ceph_client_addr(), endianess fix]
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>

diff --git a/Documentation/ABI/testing/sysfs-bus-rbd b/Documentation/ABI/testing/sysfs-bus-rbd
index 2ddd680..273e27f 100644 (file)
--- a/Documentation/ABI/testing/sysfs-bus-rbd
+++ b/Documentation/ABI/testing/sysfs-bus-rbd
@@ -43,6 +43,12 @@ Description: Available only if rbd module is inserted with single_major
 Entries under /sys/bus/rbd/devices/<dev-id>/
 --------------------------------------------
 
+client_addr
+
+       The ceph unique client entity_addr_t (address + nonce).
+       The format is <address>:<port>/<nonce>: '1.2.3.4:1234/5678' or
+       '[1:2:3:4:5:6:7:8]:1234/5678'.  (August 2016, since 4.9.)
+
 client_id
 
        The ceph unique client id that was assigned for this specific session.

diff --git a/drivers/block/rbd.c b/drivers/block/rbd.c
index fd1a989..69d76c3 100644 (file)
--- a/drivers/block/rbd.c
+++ b/drivers/block/rbd.c
@@ -4592,6 +4592,17 @@ static ssize_t rbd_minor_show(struct device *dev,
        return sprintf(buf, "%d\n", rbd_dev->minor);
 }
 
+static ssize_t rbd_client_addr_show(struct device *dev,
+                                   struct device_attribute *attr, char *buf)
+{
+       struct rbd_device *rbd_dev = dev_to_rbd_dev(dev);
+       struct ceph_entity_addr *client_addr =
+           ceph_client_addr(rbd_dev->rbd_client->client);
+
+       return sprintf(buf, "%pISpc/%u\n", &client_addr->in_addr,
+                      le32_to_cpu(client_addr->nonce));
+}
+
 static ssize_t rbd_client_id_show(struct device *dev,
                                  struct device_attribute *attr, char *buf)
 {
@@ -4702,6 +4713,7 @@ static DEVICE_ATTR(size, S_IRUGO, rbd_size_show, NULL);
 static DEVICE_ATTR(features, S_IRUGO, rbd_features_show, NULL);
 static DEVICE_ATTR(major, S_IRUGO, rbd_major_show, NULL);
 static DEVICE_ATTR(minor, S_IRUGO, rbd_minor_show, NULL);
+static DEVICE_ATTR(client_addr, S_IRUGO, rbd_client_addr_show, NULL);
 static DEVICE_ATTR(client_id, S_IRUGO, rbd_client_id_show, NULL);
 static DEVICE_ATTR(pool, S_IRUGO, rbd_pool_show, NULL);
 static DEVICE_ATTR(pool_id, S_IRUGO, rbd_pool_id_show, NULL);
@@ -4716,6 +4728,7 @@ static struct attribute *rbd_attrs[] = {
        &dev_attr_features.attr,
        &dev_attr_major.attr,
        &dev_attr_minor.attr,
+       &dev_attr_client_addr.attr,
        &dev_attr_client_id.attr,
        &dev_attr_pool.attr,
        &dev_attr_pool_id.attr,

diff --git a/include/linux/ceph/libceph.h b/include/linux/ceph/libceph.h
index b4cffff..1816c5e 100644 (file)
--- a/include/linux/ceph/libceph.h
+++ b/include/linux/ceph/libceph.h
@@ -264,6 +264,7 @@ extern struct ceph_client *ceph_create_client(struct ceph_options *opt,
                                              void *private,
                                              u64 supported_features,
                                              u64 required_features);
+struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client);
 u64 ceph_client_gid(struct ceph_client *client);
 extern void ceph_destroy_client(struct ceph_client *client);
 extern int __ceph_open_session(struct ceph_client *client,

diff --git a/net/ceph/ceph_common.c b/net/ceph/ceph_common.c
index 8a79217..464e885 100644 (file)
--- a/net/ceph/ceph_common.c
+++ b/net/ceph/ceph_common.c
@@ -566,6 +566,12 @@ int ceph_print_client_options(struct seq_file *m, struct ceph_client *client)
 }
 EXPORT_SYMBOL(ceph_print_client_options);
 
+struct ceph_entity_addr *ceph_client_addr(struct ceph_client *client)
+{
+       return &client->msgr.inst.addr;
+}
+EXPORT_SYMBOL(ceph_client_addr);
+
 u64 ceph_client_gid(struct ceph_client *client)
 {
        return client->monc.auth->global_id;