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Message-Id: <20230506232930.195451-4-cleech@redhat.com>
Date: Sat, 6 May 2023 16:29:22 -0700
From: Chris Leech <cleech@...hat.com>
To: Lee Duncan <lduncan@...e.com>,
linux-scsi@...r.kernel.org,
open-iscsi@...glegroups.com,
netdev@...r.kernel.org
Cc: Chris Leech <cleech@...hat.com>
Subject: [PATCH 03/11] iscsi: sysfs filtering by network namespace
This makes the iscsi_host, iscsi_session, iscsi_connection, iscsi_iface,
and iscsi_endpoint transport class devices only visible in sysfs under a
matching network namespace. The network namespace for all of these
objects is tracked in the iscsi_cls_host structure.
Signed-off-by: Lee Duncan <lduncan@...il.com>
Reviewed-by: Hannes Reinecke <hare@...e.de>
Signed-off-by: Chris Leech <cleech@...hat.com>
---
drivers/scsi/scsi_transport_iscsi.c | 127 ++++++++++++++++++++++++----
include/scsi/scsi_transport_iscsi.h | 1 +
2 files changed, 113 insertions(+), 15 deletions(-)
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c
index 2f9348178450..814aef6da4a3 100644
--- a/drivers/scsi/scsi_transport_iscsi.c
+++ b/drivers/scsi/scsi_transport_iscsi.c
@@ -181,9 +181,34 @@ static void iscsi_endpoint_release(struct device *dev)
kfree(ep);
}
+static struct net *iscsi_host_net(struct iscsi_cls_host *ihost)
+{
+ return ihost->netns;
+}
+
+static struct net *iscsi_endpoint_net(struct iscsi_endpoint *ep)
+{
+ struct Scsi_Host *shost = iscsi_endpoint_to_shost(ep);
+ struct iscsi_cls_host *ihost;
+
+ if (!shost)
+ return &init_net;
+ ihost = shost->shost_data;
+ return iscsi_host_net(ihost);
+}
+
+static const void *iscsi_endpoint_namespace(const struct device *dev)
+{
+ struct iscsi_endpoint *ep = iscsi_dev_to_endpoint(dev);
+
+ return iscsi_endpoint_net(ep);
+}
+
static struct class iscsi_endpoint_class = {
.name = "iscsi_endpoint",
.dev_release = iscsi_endpoint_release,
+ .ns_type = &net_ns_type_operations,
+ .namespace = iscsi_endpoint_namespace,
};
static ssize_t
@@ -309,10 +334,26 @@ static void iscsi_iface_release(struct device *dev)
put_device(parent);
}
+static struct net *iscsi_iface_net(struct iscsi_iface *iface)
+{
+ struct Scsi_Host *shost = iscsi_iface_to_shost(iface);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ return iscsi_host_net(ihost);
+}
+
+static const void *iscsi_iface_namespace(const struct device *dev)
+{
+ struct iscsi_iface *iface = iscsi_dev_to_iface(dev);
+
+ return iscsi_iface_net(iface);
+}
static struct class iscsi_iface_class = {
.name = "iscsi_iface",
.dev_release = iscsi_iface_release,
+ .ns_type = &net_ns_type_operations,
+ .namespace = iscsi_iface_namespace,
};
#define ISCSI_IFACE_ATTR(_prefix, _name, _mode, _show, _store) \
@@ -1566,6 +1607,7 @@ static int iscsi_setup_host(struct transport_container *tc, struct device *dev,
memset(ihost, 0, sizeof(*ihost));
mutex_init(&ihost->mutex);
+ ihost->netns = &init_net;
iscsi_bsg_host_add(shost, ihost);
/* ignore any bsg add error - we just can't do sgio */
@@ -1583,23 +1625,78 @@ static int iscsi_remove_host(struct transport_container *tc,
return 0;
}
-static DECLARE_TRANSPORT_CLASS(iscsi_host_class,
- "iscsi_host",
- iscsi_setup_host,
- iscsi_remove_host,
- NULL);
+#define DECLARE_TRANSPORT_CLASS_NS(cls, nm, su, rm, cfg, ns, nslookup) \
+struct transport_class cls = { \
+ .class = { \
+ .name = nm, \
+ .ns_type = ns, \
+ .namespace = nslookup, \
+ }, \
+ .setup = su, \
+ .remove = rm, \
+ .configure = cfg, \
+}
-static DECLARE_TRANSPORT_CLASS(iscsi_session_class,
- "iscsi_session",
- NULL,
- NULL,
- NULL);
+static const void *iscsi_host_namespace(const struct device *dev)
+{
+ struct Scsi_Host *shost = transport_class_to_shost(dev);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ return iscsi_host_net(ihost);
+}
+
+static DECLARE_TRANSPORT_CLASS_NS(iscsi_host_class,
+ "iscsi_host",
+ iscsi_setup_host,
+ iscsi_remove_host,
+ NULL,
+ &net_ns_type_operations,
+ iscsi_host_namespace);
+
+static struct net *iscsi_sess_net(struct iscsi_cls_session *cls_session)
+{
+ struct Scsi_Host *shost = iscsi_session_to_shost(cls_session);
+ struct iscsi_cls_host *ihost = shost->shost_data;
+
+ return iscsi_host_net(ihost);
+}
+
+static const void *iscsi_sess_namespace(const struct device *dev)
+{
+ struct iscsi_cls_session *cls_session = transport_class_to_session(dev);
+
+ return iscsi_sess_net(cls_session);
+}
+
+static DECLARE_TRANSPORT_CLASS_NS(iscsi_session_class,
+ "iscsi_session",
+ NULL,
+ NULL,
+ NULL,
+ &net_ns_type_operations,
+ iscsi_sess_namespace);
+
+static struct net *iscsi_conn_net(struct iscsi_cls_conn *cls_conn)
+{
+ struct iscsi_cls_session *cls_session = iscsi_conn_to_session(cls_conn);
+
+ return iscsi_sess_net(cls_session);
+}
+
+static const void *iscsi_conn_namespace(const struct device *dev)
+{
+ struct iscsi_cls_conn *cls_conn = transport_class_to_conn(dev);
+
+ return iscsi_conn_net(cls_conn);
+}
-static DECLARE_TRANSPORT_CLASS(iscsi_connection_class,
- "iscsi_connection",
- NULL,
- NULL,
- NULL);
+static DECLARE_TRANSPORT_CLASS_NS(iscsi_connection_class,
+ "iscsi_connection",
+ NULL,
+ NULL,
+ NULL,
+ &net_ns_type_operations,
+ iscsi_conn_namespace);
struct iscsi_net {
struct sock *nls;
diff --git a/include/scsi/scsi_transport_iscsi.h b/include/scsi/scsi_transport_iscsi.h
index 8ade6a03f85a..d795e65a1f75 100644
--- a/include/scsi/scsi_transport_iscsi.h
+++ b/include/scsi/scsi_transport_iscsi.h
@@ -299,6 +299,7 @@ struct iscsi_cls_host {
struct request_queue *bsg_q;
uint32_t port_speed;
uint32_t port_state;
+ struct net *netns;
};
#define iscsi_job_to_shost(_job) \
--
2.39.2
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