android_kernel_xiaomi_sm8350/drivers/infiniband/ulp/ipoib/ipoib_fs.c
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00

288 lines
6.3 KiB
C

/*
* 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);
}