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Revision 92a8109e4d3a34fb6b115c9098b51767dc933444 authored by Ross Lagerwall on 08 January 2019, 18:30:56 UTC, committed by Steve French on 11 January 2019, 13:14:40 UTC 
cifs: Limit memory used by lock request calls to a page
 
The code tries to allocate a contiguous buffer with a size supplied by
the server (maxBuf). This could fail if memory is fragmented since it
results in high order allocations for commonly used server
implementations. It is also wasteful since there are probably
few locks in the usual case. Limit the buffer to be no larger than a
page to avoid memory allocation failures due to fragmentation.

Signed-off-by: Ross Lagerwall <ross.lagerwall@citrix.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
1 parent 15bc77f
Raw File
debugfs.h 
/* SPDX-License-Identifier: GPL-2.0 */
/* Copyright (C) 2010-2018  B.A.T.M.A.N. contributors:
 *
 * Marek Lindner
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License 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, see <http://www.gnu.org/licenses/>.
 */

#ifndef _NET_BATMAN_ADV_DEBUGFS_H_
#define _NET_BATMAN_ADV_DEBUGFS_H_

#include "main.h"

struct file;
struct net_device;

#define BATADV_DEBUGFS_SUBDIR "batman_adv"

#if IS_ENABLED(CONFIG_BATMAN_ADV_DEBUGFS)

void batadv_debugfs_deprecated(struct file *file, const char *alt);
void batadv_debugfs_init(void);
void batadv_debugfs_destroy(void);
int batadv_debugfs_add_meshif(struct net_device *dev);
void batadv_debugfs_rename_meshif(struct net_device *dev);
void batadv_debugfs_del_meshif(struct net_device *dev);
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface);
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface);

#else

static inline void batadv_debugfs_deprecated(struct file *file, const char *alt)
{
}

static inline void batadv_debugfs_init(void)
{
}

static inline void batadv_debugfs_destroy(void)
{
}

static inline int batadv_debugfs_add_meshif(struct net_device *dev)
{
	return 0;
}

static inline void batadv_debugfs_rename_meshif(struct net_device *dev)
{
}

static inline void batadv_debugfs_del_meshif(struct net_device *dev)
{
}

static inline
int batadv_debugfs_add_hardif(struct batadv_hard_iface *hard_iface)
{
	return 0;
}

static inline
void batadv_debugfs_rename_hardif(struct batadv_hard_iface *hard_iface)
{
}

static inline
void batadv_debugfs_del_hardif(struct batadv_hard_iface *hard_iface)
{
}

#endif

#endif /* _NET_BATMAN_ADV_DEBUGFS_H_ */
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