summaryrefslogtreecommitdiffstats
path: root/libglusterfs/src/gf-dirent.c
diff options
context:
space:
mode:
authorVikas Gorur <vikas@zresearch.com>2009-02-18 17:36:07 +0530
committerVikas Gorur <vikas@zresearch.com>2009-02-18 17:36:07 +0530
commit77adf4cd648dce41f89469dd185deec6b6b53a0b (patch)
tree02e155a5753b398ee572b45793f889b538efab6b /libglusterfs/src/gf-dirent.c
parentf3b2e6580e5663292ee113c741343c8a43ee133f (diff)
Added all files
Diffstat (limited to 'libglusterfs/src/gf-dirent.c')
-rw-r--r--libglusterfs/src/gf-dirent.c157
1 files changed, 157 insertions, 0 deletions
diff --git a/libglusterfs/src/gf-dirent.c b/libglusterfs/src/gf-dirent.c
new file mode 100644
index 000000000..28d1ab425
--- /dev/null
+++ b/libglusterfs/src/gf-dirent.c
@@ -0,0 +1,157 @@
+/*
+ Copyright (c) 2008 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;
+}