[patch v2 34/37] add rxe_net_sysfs.c

[rpearson-klaOcWyJdxkshyMvu7JE4pqQE7yCjDx5@public.gmane.org]

[-- Attachment #1: add-rxe_net_sysfs.c --]
[-- Type: text/plain, Size: 6455 bytes --]

sysfs interface for ib_rxe_net.

Signed-off-by: Bob Pearson <rpearson-klaOcWyJdxkshyMvu7JE4pqQE7yCjDx5@public.gmane.org>

---
 drivers/infiniband/hw/rxe/rxe_net_sysfs.c |  229 ++++++++++++++++++++++++++++++
 1 file changed, 229 insertions(+)

Index: infiniband/drivers/infiniband/hw/rxe/rxe_net_sysfs.c
===================================================================
--- /dev/null
+++ infiniband/drivers/infiniband/hw/rxe/rxe_net_sysfs.c
@@ -0,0 +1,229 @@
+/*
+ * Copyright (c) 2009-2011 Mellanox Technologies Ltd. All rights reserved.
+ * Copyright (c) 2009-2011 System Fabric Works, Inc. All rights reserved.
+ *
+ * This software is available to you under a choice of one of two
+ * licenses.  You may choose to be licensed under the terms of the GNU
+ * General Public License (GPL) Version 2, available from the file
+ * COPYING in the main directory of this source tree, or the
+ * OpenIB.org BSD license below:
+ *
+ *     Redistribution and use in source and binary forms, with or
+ *     without modification, are permitted provided that the following
+ *     conditions are met:
+ *
+ *	- Redistributions of source code must retain the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer.
+ *
+ *	- Redistributions in binary form must reproduce the above
+ *	  copyright notice, this list of conditions and the following
+ *	  disclaimer in the documentation and/or other materials
+ *	  provided with the distribution.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#include "rxe.h"
+#include "rxe_net.h"
+
+/* Copy argument and remove trailing CR. Return the new length. */
+static int sanitize_arg(const char *val, char *intf, int intf_len)
+{
+	int len;
+
+	if (!val)
+		return 0;
+
+	/* Remove newline. */
+	for (len = 0; len < intf_len - 1 && val[len] && val[len] != '\n'; len++)
+		intf[len] = val[len];
+	intf[len] = 0;
+
+	if (len == 0 || (val[len] != 0 && val[len] != '\n'))
+		return 0;
+
+	return len;
+}
+
+/* Caller must hold net_info_lock */
+static void rxe_set_port_state(struct net_device *ndev)
+{
+	struct rxe_dev *rxe;
+
+	if (ndev->ifindex >= RXE_MAX_IF_INDEX)
+		goto out;
+
+	rxe = net_to_rxe(ndev);
+	if (!rxe)
+		goto out;
+
+	if (net_info[ndev->ifindex].status == IB_PORT_ACTIVE)
+		rxe_net_up(ndev);
+	else
+		rxe_net_down(ndev); /* down for unknown state */
+out:
+	return;
+}
+
+static int rxe_param_set_add(const char *val, struct kernel_param *kp)
+{
+	int i, len;
+	char intf[32];
+
+	len = sanitize_arg(val, intf, sizeof(intf));
+	if (!len) {
+		pr_err("rxe_net: add: invalid interface name\n");
+		return -EINVAL;
+	}
+
+	spin_lock_bh(&net_info_lock);
+	for (i = 0; i < RXE_MAX_IF_INDEX; i++) {
+		struct net_device *ndev = net_info[i].ndev;
+
+		if (ndev && (0 == strncmp(intf, ndev->name, len))) {
+			spin_unlock_bh(&net_info_lock);
+			if (net_info[i].rxe)
+				pr_info("rxe_net: already configured on %s\n",
+					intf);
+			else {
+				rxe_net_add(ndev);
+				if (net_info[i].rxe) {
+					rxe_set_port_state(ndev);
+				} else
+					pr_err("rxe_net: add appears to have "
+					       "failed for %s (index %d)\n",
+					       intf, i);
+			}
+			return 0;
+		}
+	}
+	spin_unlock_bh(&net_info_lock);
+
+	pr_warning("interface %s not found\n", intf);
+
+	return 0;
+}
+
+static void rxe_remove_all(void)
+{
+	int i;
+	struct rxe_dev *rxe;
+
+	for (i = 0; i < RXE_MAX_IF_INDEX; i++) {
+		if (net_info[i].rxe) {
+			spin_lock_bh(&net_info_lock);
+			rxe = net_info[i].rxe;
+			net_info[i].rxe = NULL;
+			spin_unlock_bh(&net_info_lock);
+
+			rxe_remove(rxe);
+		}
+	}
+}
+
+static int rxe_param_set_remove(const char *val, struct kernel_param *kp)
+{
+	int i, len;
+	char intf[32];
+	struct rxe_dev *rxe;
+
+	len = sanitize_arg(val, intf, sizeof(intf));
+	if (!len) {
+		pr_err("rxe_net: remove: invalid interface name\n");
+		return -EINVAL;
+	}
+
+	if (strncmp("all", intf, len) == 0) {
+		pr_info("rxe_sys: remove all");
+		rxe_remove_all();
+		return 0;
+	}
+
+	spin_lock_bh(&net_info_lock);
+	for (i = 0; i < RXE_MAX_IF_INDEX; i++) {
+		if (!net_info[i].rxe || !net_info[i].ndev)
+			continue;
+
+		if (0 == strncmp(intf, net_info[i].rxe->ib_dev.name, len)) {
+			rxe = net_info[i].rxe;
+			net_info[i].rxe = NULL;
+			spin_unlock_bh(&net_info_lock);
+
+			rxe_remove(rxe);
+			return 0;
+		}
+	}
+	spin_unlock_bh(&net_info_lock);
+	pr_warning("rxe_sys: instance %s not found\n", intf);
+
+	return 0;
+}
+
+module_param_call(add, rxe_param_set_add, NULL, NULL, 0200);
+module_param_call(remove, rxe_param_set_remove, NULL, NULL, 0200);
+
+static int rxe_param_set_mtu(const char *val, struct kernel_param *kp)
+{
+	int i, rc, len;
+	int do_all = 0;
+	char intf[32];
+	char cmd[32];
+	int tmp_mtu;
+
+	len = sanitize_arg(val, intf, sizeof(intf));
+	if (!len)
+		return -EINVAL;
+
+	rc = sscanf(intf, "%s %d", cmd, &tmp_mtu);
+	if (rc != 2) {
+		pr_warning("rxe_net: mtu bogus input (%s)\n", intf);
+		goto out;
+	}
+
+	pr_info("set_mtu: %s %d\n", cmd, tmp_mtu);
+
+	if (!(is_power_of_2(tmp_mtu)
+	      && (tmp_mtu >= 256)
+	      && (tmp_mtu <= 4096))) {
+		pr_warning("rxe_net: bogus mtu (%s - %d pow2  %d)\n",
+			   intf, tmp_mtu, is_power_of_2(tmp_mtu));
+		goto out;
+	}
+
+	tmp_mtu = rxe_mtu_int_to_enum(tmp_mtu);
+
+	if (strcmp("all", cmd) == 0)
+		do_all = 1;
+
+	spin_lock_bh(&net_info_lock);
+	for (i = 0; i < RXE_MAX_IF_INDEX; i++) {
+		if (net_info[i].rxe && net_info[i].ndev) {
+			if (do_all
+			    || (0 == strncmp(cmd,
+					     net_info[i].rxe->ib_dev.name,
+					     len))) {
+				net_info[i].rxe->pref_mtu = tmp_mtu;
+
+				rxe_set_mtu(net_info[i].rxe,
+					    net_info[i].ndev->mtu, 1);
+
+				if (!do_all)
+					break;
+			}
+		}
+	}
+	spin_unlock_bh(&net_info_lock);
+
+out:
+	return 0;
+}
+
+module_param_call(mtu, rxe_param_set_mtu, NULL, NULL, 0200);


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