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authorPaulius Zaleckas <paulius.zaleckas@teltonika.lt>2009-05-13 06:20:29 -0700
committerInaky Perez-Gonzalez <inaky@linux.intel.com>2009-05-28 18:02:20 -0700
commit7f0333eb2f98bbfece4fbfe21076d0a3e49f0bb0 (patch)
tree6dcfd052fccde051f56600a7cea095a8f1479d74 /net/wimax
parenta0a4c4c9e54ee4255f46eedb572ad69ee34c77b6 (diff)
wimax: Add netlink interface to get device state
wimax connection manager / daemon has to know what is current state of the device. Previously it was only possible to get notification whet state has changed. Note: By mistake, the new generic netlink's number for WIMAX_GNL_OP_STATE_GET was declared inserting into the existing list of API calls, not appending; thus, it'd break existing API. Fixed by Inaky Perez-Gonzalez <inaky@linux.intel.com> by moving to the tail, where we add to the interface, not modify the interface. Thanks to Stephen Hemminger <shemminger@vyatta.com> for catching this. Signed-off-by: Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
Diffstat (limited to 'net/wimax')
-rw-r--r--net/wimax/Makefile1
-rw-r--r--net/wimax/debug-levels.h1
-rw-r--r--net/wimax/debugfs.c1
-rw-r--r--net/wimax/op-state-get.c86
-rw-r--r--net/wimax/stack.c5
5 files changed, 93 insertions, 1 deletions
diff --git a/net/wimax/Makefile b/net/wimax/Makefile
index 5b80b941c2c9..8f1510d0cc2b 100644
--- a/net/wimax/Makefile
+++ b/net/wimax/Makefile
@@ -6,6 +6,7 @@ wimax-y := \
op-msg.o \
op-reset.o \
op-rfkill.o \
+ op-state-get.o \
stack.o
wimax-$(CONFIG_DEBUG_FS) += debugfs.o
diff --git a/net/wimax/debug-levels.h b/net/wimax/debug-levels.h
index 1c29123a3aa9..0975adba6b71 100644
--- a/net/wimax/debug-levels.h
+++ b/net/wimax/debug-levels.h
@@ -36,6 +36,7 @@ enum d_module {
D_SUBMODULE_DECLARE(op_msg),
D_SUBMODULE_DECLARE(op_reset),
D_SUBMODULE_DECLARE(op_rfkill),
+ D_SUBMODULE_DECLARE(op_state_get),
D_SUBMODULE_DECLARE(stack),
};
diff --git a/net/wimax/debugfs.c b/net/wimax/debugfs.c
index 94d216a46407..6c9bedb7431e 100644
--- a/net/wimax/debugfs.c
+++ b/net/wimax/debugfs.c
@@ -61,6 +61,7 @@ int wimax_debugfs_add(struct wimax_dev *wimax_dev)
__debugfs_register("wimax_dl_", op_msg, dentry);
__debugfs_register("wimax_dl_", op_reset, dentry);
__debugfs_register("wimax_dl_", op_rfkill, dentry);
+ __debugfs_register("wimax_dl_", op_state_get, dentry);
__debugfs_register("wimax_dl_", stack, dentry);
result = 0;
out:
diff --git a/net/wimax/op-state-get.c b/net/wimax/op-state-get.c
new file mode 100644
index 000000000000..a76b8fcb056d
--- /dev/null
+++ b/net/wimax/op-state-get.c
@@ -0,0 +1,86 @@
+/*
+ * Linux WiMAX
+ * Implement and export a method for getting a WiMAX device current state
+ *
+ * Copyright (C) 2009 Paulius Zaleckas <paulius.zaleckas@teltonika.lt>
+ *
+ * Based on previous WiMAX core work by:
+ * Copyright (C) 2008 Intel Corporation <linux-wimax@intel.com>
+ * Inaky Perez-Gonzalez <inaky.perez-gonzalez@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License version
+ * 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA.
+ */
+
+#include <net/wimax.h>
+#include <net/genetlink.h>
+#include <linux/wimax.h>
+#include <linux/security.h>
+#include "wimax-internal.h"
+
+#define D_SUBMODULE op_state_get
+#include "debug-levels.h"
+
+
+static const
+struct nla_policy wimax_gnl_state_get_policy[WIMAX_GNL_ATTR_MAX + 1] = {
+ [WIMAX_GNL_STGET_IFIDX] = {
+ .type = NLA_U32,
+ },
+};
+
+
+/*
+ * Exporting to user space over generic netlink
+ *
+ * Parse the state get command from user space, return a combination
+ * value that describe the current state.
+ *
+ * No attributes.
+ */
+static
+int wimax_gnl_doit_state_get(struct sk_buff *skb, struct genl_info *info)
+{
+ int result, ifindex;
+ struct wimax_dev *wimax_dev;
+ struct device *dev;
+
+ d_fnstart(3, NULL, "(skb %p info %p)\n", skb, info);
+ result = -ENODEV;
+ if (info->attrs[WIMAX_GNL_STGET_IFIDX] == NULL) {
+ printk(KERN_ERR "WIMAX_GNL_OP_STATE_GET: can't find IFIDX "
+ "attribute\n");
+ goto error_no_wimax_dev;
+ }
+ ifindex = nla_get_u32(info->attrs[WIMAX_GNL_STGET_IFIDX]);
+ wimax_dev = wimax_dev_get_by_genl_info(info, ifindex);
+ if (wimax_dev == NULL)
+ goto error_no_wimax_dev;
+ dev = wimax_dev_to_dev(wimax_dev);
+ /* Execute the operation and send the result back to user space */
+ result = wimax_state_get(wimax_dev);
+ dev_put(wimax_dev->net_dev);
+error_no_wimax_dev:
+ d_fnend(3, NULL, "(skb %p info %p) = %d\n", skb, info, result);
+ return result;
+}
+
+
+struct genl_ops wimax_gnl_state_get = {
+ .cmd = WIMAX_GNL_OP_STATE_GET,
+ .flags = GENL_ADMIN_PERM,
+ .policy = wimax_gnl_state_get_policy,
+ .doit = wimax_gnl_doit_state_get,
+ .dumpit = NULL,
+};
diff --git a/net/wimax/stack.c b/net/wimax/stack.c
index 933e1422b09f..79fb7d7c640f 100644
--- a/net/wimax/stack.c
+++ b/net/wimax/stack.c
@@ -402,13 +402,15 @@ EXPORT_SYMBOL_GPL(wimax_dev_init);
extern struct genl_ops
wimax_gnl_msg_from_user,
wimax_gnl_reset,
- wimax_gnl_rfkill;
+ wimax_gnl_rfkill,
+ wimax_gnl_state_get;
static
struct genl_ops *wimax_gnl_ops[] = {
&wimax_gnl_msg_from_user,
&wimax_gnl_reset,
&wimax_gnl_rfkill,
+ &wimax_gnl_state_get,
};
@@ -533,6 +535,7 @@ struct d_level D_LEVEL[] = {
D_SUBMODULE_DEFINE(op_msg),
D_SUBMODULE_DEFINE(op_reset),
D_SUBMODULE_DEFINE(op_rfkill),
+ D_SUBMODULE_DEFINE(op_state_get),
D_SUBMODULE_DEFINE(stack),
};
size_t D_LEVEL_SIZE = ARRAY_SIZE(D_LEVEL);

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