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/*
Copyright (c) 2008-2009 Z RESEARCH, Inc. <http://www.zresearch.com>
This file is part of GlusterFS.
GlusterFS 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 3 of the License,
or (at your option) any later version.
GlusterFS 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 _CONFIG_H
#define _CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <stdint.h>
#include "compat.h"
#include "xlator.h"
#include "byte-order.h"
struct gf_dirent_nb {
uint64_t d_ino;
uint64_t d_off;
uint32_t d_len;
uint32_t d_type;
char d_name[0];
} __attribute__((packed));
int
gf_dirent_nb_size (gf_dirent_t *entries)
{
return (sizeof (struct gf_dirent_nb) + strlen (entries->d_name) + 1);
}
gf_dirent_t *
gf_dirent_for_name (const char *name)
{
gf_dirent_t *gf_dirent = NULL;
/* TODO: use mem-pool */
gf_dirent = CALLOC (gf_dirent_size (name), 1);
if (!gf_dirent)
return NULL;
INIT_LIST_HEAD (&gf_dirent->list);
strcpy (gf_dirent->d_name, name);
gf_dirent->d_off = 0;
gf_dirent->d_ino = -1;
gf_dirent->d_type = 0;
gf_dirent->d_len = strlen (name);
return gf_dirent;
}
void
gf_dirent_free (gf_dirent_t *entries)
{
gf_dirent_t *entry = NULL;
gf_dirent_t *tmp = NULL;
list_for_each_entry_safe (entry, tmp, &entries->list, list) {
list_del (&entry->list);
FREE (entry);
}
}
int
gf_dirent_serialize (gf_dirent_t *entries, char *buf, size_t buf_size)
{
struct gf_dirent_nb *entry_nb = NULL;
gf_dirent_t *entry = NULL;
int size = 0;
int entry_size = 0;
list_for_each_entry (entry, &entries->list, list) {
entry_size = gf_dirent_nb_size (entry);
if (buf && (size + entry_size <= buf_size)) {
entry_nb = (void *) (buf + size);
entry_nb->d_ino = hton64 (entry->d_ino);
entry_nb->d_off = hton64 (entry->d_off);
entry_nb->d_len = hton32 (entry->d_len);
entry_nb->d_type = hton32 (entry->d_type);
strcpy (entry_nb->d_name, entry->d_name);
}
size += entry_size;
}
return size;
}
int
gf_dirent_unserialize (gf_dirent_t *entries, const char *buf, size_t buf_size)
{
struct gf_dirent_nb *entry_nb = NULL;
int remaining_size = 0;
int least_dirent_size = 0;
int count = 0;
gf_dirent_t *entry = NULL;
int entry_strlen = 0;
int entry_len = 0;
remaining_size = buf_size;
least_dirent_size = (sizeof (struct gf_dirent_nb) + 2);
while (remaining_size >= least_dirent_size) {
entry_nb = (void *)(buf + (buf_size - remaining_size));
entry_strlen = strnlen (entry_nb->d_name, remaining_size);
if (entry_strlen == remaining_size) {
break;
}
entry_len = sizeof (gf_dirent_t) + entry_strlen + 1;
entry = CALLOC (1, entry_len);
if (!entry) {
break;
}
entry->d_ino = ntoh64 (entry_nb->d_ino);
entry->d_off = ntoh64 (entry_nb->d_off);
entry->d_len = ntoh32 (entry_nb->d_len);
entry->d_type = ntoh32 (entry_nb->d_type);
strcpy (entry->d_name, entry_nb->d_name);
list_add_tail (&entry->list, &entries->list);
remaining_size -= (sizeof (*entry_nb) + entry_strlen + 1);
count++;
}
return count;
}
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