1 files changed, 287 insertions, 0 deletions

diff --git a/drivers/infiniband/ulp/ipoib/ipoib_fs.c b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
new file mode 100644
index 000000000000..044f2c78ef15
--- /dev/null
+++ b/drivers/infiniband/ulp/ipoib/ipoib_fs.c
@@ -0,0 +1,287 @@
+/*
+ * Copyright (c) 2004 Topspin Communications.  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.
+ *
+ * $Id: ipoib_fs.c 1389 2004-12-27 22:56:47Z roland $
+ */
+
+#include <linux/pagemap.h>
+#include <linux/seq_file.h>
+
+#include "ipoib.h"
+
+enum {
+        IPOIB_MAGIC = 0x49504942 /* "IPIB" */
+};
+
+static DECLARE_MUTEX(ipoib_fs_mutex);
+static struct dentry *ipoib_root;
+static struct super_block *ipoib_sb;
+static LIST_HEAD(ipoib_device_list);
+
+static void *ipoib_mcg_seq_start(struct seq_file *file, loff_t *pos)
+{
+        struct ipoib_mcast_iter *iter;
+        loff_t n = *pos;
+
+        iter = ipoib_mcast_iter_init(file->private);
+        if (!iter)
+                return NULL;
+
+        while (n--) {
+                if (ipoib_mcast_iter_next(iter)) {
+                        ipoib_mcast_iter_free(iter);
+                        return NULL;
+                }
+        }
+
+        return iter;
+}
+
+static void *ipoib_mcg_seq_next(struct seq_file *file, void *iter_ptr,
+                                   loff_t *pos)
+{
+        struct ipoib_mcast_iter *iter = iter_ptr;
+
+        (*pos)++;
+
+        if (ipoib_mcast_iter_next(iter)) {
+                ipoib_mcast_iter_free(iter);
+                return NULL;
+        }
+
+        return iter;
+}
+
+static void ipoib_mcg_seq_stop(struct seq_file *file, void *iter_ptr)
+{
+        /* nothing for now */
+}
+
+static int ipoib_mcg_seq_show(struct seq_file *file, void *iter_ptr)
+{
+        struct ipoib_mcast_iter *iter = iter_ptr;
+        char gid_buf[sizeof "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff"];
+        union ib_gid mgid;
+        int i, n;
+        unsigned long created;
+        unsigned int queuelen, complete, send_only;
+
+        if (iter) {
+                ipoib_mcast_iter_read(iter, &mgid, &created, &queuelen,
+                                      &complete, &send_only);
+
+                for (n = 0, i = 0; i < sizeof mgid / 2; ++i) {
+                        n += sprintf(gid_buf + n, "%x",
+                                     be16_to_cpu(((u16 *)mgid.raw)[i]));
+                        if (i < sizeof mgid / 2 - 1)
+                                gid_buf[n++] = ':';
+                }
+        }
+
+        seq_printf(file, "GID: %*s", -(1 + (int) sizeof gid_buf), gid_buf);
+
+        seq_printf(file,
+                   " created: %10ld queuelen: %4d complete: %d send_only: %d\n",
+                   created, queuelen, complete, send_only);
+
+        return 0;
+}
+
+static struct seq_operations ipoib_seq_ops = {
+        .start = ipoib_mcg_seq_start,
+        .next  = ipoib_mcg_seq_next,
+        .stop  = ipoib_mcg_seq_stop,
+        .show  = ipoib_mcg_seq_show,
+};
+
+static int ipoib_mcg_open(struct inode *inode, struct file *file)
+{
+        struct seq_file *seq;
+        int ret;
+
+        ret = seq_open(file, &ipoib_seq_ops);
+        if (ret)
+                return ret;
+
+        seq = file->private_data;
+        seq->private = inode->u.generic_ip;
+
+        return 0;
+}
+
+static struct file_operations ipoib_fops = {
+        .owner   = THIS_MODULE,
+        .open    = ipoib_mcg_open,
+        .read    = seq_read,
+        .llseek  = seq_lseek,
+        .release = seq_release
+};
+
+static struct inode *ipoib_get_inode(void)
+{
+        struct inode *inode = new_inode(ipoib_sb);
+
+        if (inode) {
+                inode->i_mode    = S_IFREG | S_IRUGO;
+                inode->i_uid     = 0;
+                inode->i_gid     = 0;
+                inode->i_blksize = PAGE_CACHE_SIZE;
+                inode->i_blocks  = 0;
+                inode->i_atime   = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+                inode->i_fop     = &ipoib_fops;
+        }
+
+        return inode;
+}
+
+static int __ipoib_create_debug_file(struct net_device *dev)
+{
+        struct ipoib_dev_priv *priv = netdev_priv(dev);
+        struct dentry *dentry;
+        struct inode *inode;
+        char name[IFNAMSIZ + sizeof "_mcg"];
+
+        snprintf(name, sizeof name, "%s_mcg", dev->name);
+
+        dentry = d_alloc_name(ipoib_root, name);
+        if (!dentry)
+                return -ENOMEM;
+
+        inode = ipoib_get_inode();
+        if (!inode) {
+                dput(dentry);
+                return -ENOMEM;
+        }
+
+        inode->u.generic_ip = dev;
+        priv->mcg_dentry = dentry;
+
+        d_add(dentry, inode);
+
+        return 0;
+}
+
+int ipoib_create_debug_file(struct net_device *dev)
+{
+        struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+        down(&ipoib_fs_mutex);
+
+        list_add_tail(&priv->fs_list, &ipoib_device_list);
+
+        if (!ipoib_sb) {
+                up(&ipoib_fs_mutex);
+                return 0;
+        }
+
+        up(&ipoib_fs_mutex);
+
+        return __ipoib_create_debug_file(dev);
+}
+
+void ipoib_delete_debug_file(struct net_device *dev)
+{
+        struct ipoib_dev_priv *priv = netdev_priv(dev);
+
+        down(&ipoib_fs_mutex);
+        list_del(&priv->fs_list);
+        if (!ipoib_sb) {
+                up(&ipoib_fs_mutex);
+                return;
+        }
+        up(&ipoib_fs_mutex);
+
+        if (priv->mcg_dentry) {
+                d_drop(priv->mcg_dentry);
+                simple_unlink(ipoib_root->d_inode, priv->mcg_dentry);
+        }
+}
+
+static int ipoib_fill_super(struct super_block *sb, void *data, int silent)
+{
+        static struct tree_descr ipoib_files[] = {
+                { "" }
+        };
+        struct ipoib_dev_priv *priv;
+        int ret;
+
+        ret = simple_fill_super(sb, IPOIB_MAGIC, ipoib_files);
+        if (ret)
+                return ret;
+
+        ipoib_root = sb->s_root;
+
+        down(&ipoib_fs_mutex);
+
+        ipoib_sb = sb;
+
+        list_for_each_entry(priv, &ipoib_device_list, fs_list) {
+                ret = __ipoib_create_debug_file(priv->dev);
+                if (ret)
+                        break;
+        }
+
+        up(&ipoib_fs_mutex);
+
+        return ret;
+}
+
+static struct super_block *ipoib_get_sb(struct file_system_type *fs_type,
+        int flags, const char *dev_name, void *data)
+{
+        return get_sb_single(fs_type, flags, data, ipoib_fill_super);
+}
+
+static void ipoib_kill_sb(struct super_block *sb)
+{
+        down(&ipoib_fs_mutex);
+        ipoib_sb = NULL;
+        up(&ipoib_fs_mutex);
+
+        kill_litter_super(sb);
+}
+
+static struct file_system_type ipoib_fs_type = {
+        .owner          = THIS_MODULE,
+        .name           = "ipoib_debugfs",
+        .get_sb         = ipoib_get_sb,
+        .kill_sb        = ipoib_kill_sb,
+};
+
+int ipoib_register_debugfs(void)
+{
+        return register_filesystem(&ipoib_fs_type);
+}
+
+void ipoib_unregister_debugfs(void)
+{
+        unregister_filesystem(&ipoib_fs_type);
+}