/usr/src/lttng-modules-2.5.1/wrapper/fdtable.c is in lttng-modules-dkms 2.5.1-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 | /*
* wrapper/fdtable.c
*
* Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; only
* version 2.1 of the License.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <linux/version.h>
#include <linux/spinlock.h>
#include "fdtable.h"
#if (LINUX_VERSION_CODE < KERNEL_VERSION(3,7,0))
/*
* Reimplementation of iterate_fd() for kernels between 2.6.32 and 3.6
* (inclusive).
*/
int lttng_iterate_fd(struct files_struct *files,
unsigned int first,
int (*cb)(const void *, struct file *, unsigned int),
const void *ctx)
{
struct fdtable *fdt;
struct file *filp;
unsigned int i;
int res = 0;
if (!files)
return 0;
spin_lock(&files->file_lock);
fdt = files_fdtable(files);
for (i = 0; i < fdt->max_fds; i++) {
filp = fcheck_files(files, i);
if (!filp)
continue;
res = cb(ctx, filp, i);
if (res)
break;
}
spin_unlock(&files->file_lock);
return res;
}
#endif
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