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/* timskmodutils.c
*
* Copyright � 2010 - 2013 UNISYS CORPORATION
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* 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, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*/
#include "uniklog.h"
#include "timskmod.h"
#define MYDRVNAME "timskmodutils"
/** Callers to interfaces that set __GFP_NORETRY flag below
* must check for a NULL (error) result as we are telling the
* kernel interface that it is okay to fail.
*/
void *kmalloc_kernel(size_t siz)
{
return kmalloc(siz, GFP_KERNEL | __GFP_NORETRY);
}
/* Use these handy-dandy seq_file_xxx functions if you want to call some
* functions that write stuff into a seq_file, but you actually just want
* to dump that output into a buffer. Use them as follows:
* - call visor_seq_file_new_buffer to create the seq_file (you supply the buf)
* - call whatever functions you want that take a seq_file as an argument
* (the buf you supplied will get the output data)
* - call visor_seq_file_done_buffer to dispose of your seq_file
*/
struct seq_file *visor_seq_file_new_buffer(void *buf, size_t buf_size)
{
struct seq_file *rc = NULL;
struct seq_file *m = kmalloc_kernel(sizeof(struct seq_file));
if (m == NULL) {
rc = NULL;
goto Away;
}
memset(m, 0, sizeof(struct seq_file));
m->buf = buf;
m->size = buf_size;
rc = m;
Away:
if (rc == NULL) {
visor_seq_file_done_buffer(m);
m = NULL;
}
return rc;
}
EXPORT_SYMBOL_GPL(visor_seq_file_new_buffer);
void visor_seq_file_done_buffer(struct seq_file *m)
{
if (!m)
return;
kfree(m);
}
EXPORT_SYMBOL_GPL(visor_seq_file_done_buffer);
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