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/*
Copyright (c) 2013 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#include "changelog-encoders.h"
size_t
entry_fn (void *data, char *buffer, gf_boolean_t encode)
{
char *tmpbuf = NULL;
size_t bufsz = 0;
struct changelog_entry_fields *ce = NULL;
ce = (struct changelog_entry_fields *) data;
if (encode) {
tmpbuf = uuid_utoa (ce->cef_uuid);
CHANGELOG_FILL_BUFFER (buffer, bufsz, tmpbuf, strlen (tmpbuf));
} else {
CHANGELOG_FILL_BUFFER (buffer, bufsz,
ce->cef_uuid, sizeof (uuid_t));
}
CHANGELOG_FILL_BUFFER (buffer, bufsz, "/", 1);
CHANGELOG_FILL_BUFFER (buffer, bufsz,
ce->cef_bname, strlen (ce->cef_bname));
return bufsz;
}
size_t
del_entry_fn (void *data, char *buffer, gf_boolean_t encode)
{
char *tmpbuf = NULL;
size_t bufsz = 0;
struct changelog_entry_fields *ce = NULL;
ce = (struct changelog_entry_fields *) data;
if (encode) {
tmpbuf = uuid_utoa (ce->cef_uuid);
CHANGELOG_FILL_BUFFER (buffer, bufsz, tmpbuf, strlen (tmpbuf));
} else {
CHANGELOG_FILL_BUFFER (buffer, bufsz,
ce->cef_uuid, sizeof (uuid_t));
}
CHANGELOG_FILL_BUFFER (buffer, bufsz, "/", 1);
CHANGELOG_FILL_BUFFER (buffer, bufsz,
ce->cef_bname, strlen (ce->cef_bname));
CHANGELOG_FILL_BUFFER (buffer, bufsz, "\0", 1);
if (ce->cef_path[0] == '\0') {
CHANGELOG_FILL_BUFFER (buffer, bufsz, "\0", 1);
} else {
CHANGELOG_FILL_BUFFER (buffer, bufsz,
ce->cef_path, strlen (ce->cef_path));
}
return bufsz;
}
size_t
fop_fn (void *data, char *buffer, gf_boolean_t encode)
{
char buf[10] = {0,};
size_t bufsz = 0;
glusterfs_fop_t fop = 0;
fop = *(glusterfs_fop_t *) data;
if (encode) {
(void) snprintf (buf, sizeof (buf), "%d", fop);
CHANGELOG_FILL_BUFFER (buffer, bufsz, buf, strlen (buf));
} else
CHANGELOG_FILL_BUFFER (buffer, bufsz, &fop, sizeof (fop));
return bufsz;
}
size_t
number_fn (void *data, char *buffer, gf_boolean_t encode)
{
size_t bufsz = 0;
unsigned int nr = 0;
char buf[20] = {0,};
nr = *(unsigned int *) data;
if (encode) {
(void) snprintf (buf, sizeof (buf), "%u", nr);
CHANGELOG_FILL_BUFFER (buffer, bufsz, buf, strlen (buf));
} else
CHANGELOG_FILL_BUFFER (buffer, bufsz, &nr, sizeof (unsigned int));
return bufsz;
}
void
entry_free_fn (void *data)
{
changelog_opt_t *co = data;
if (!co)
return;
GF_FREE (co->co_entry.cef_bname);
}
void
del_entry_free_fn (void *data)
{
changelog_opt_t *co = data;
if (!co)
return;
GF_FREE (co->co_entry.cef_bname);
GF_FREE (co->co_entry.cef_path);
}
/**
* try to write all data in one shot
*/
static inline void
changelog_encode_write_xtra (changelog_log_data_t *cld,
char *buffer, size_t *off, gf_boolean_t encode)
{
int i = 0;
size_t offset = 0;
void *data = NULL;
changelog_opt_t *co = NULL;
offset = *off;
co = (changelog_opt_t *) cld->cld_ptr;
for (; i < cld->cld_xtra_records; i++, co++) {
CHANGELOG_FILL_BUFFER (buffer, offset, "\0", 1);
switch (co->co_type) {
case CHANGELOG_OPT_REC_FOP:
data = &co->co_fop;
break;
case CHANGELOG_OPT_REC_ENTRY:
data = &co->co_entry;
break;
case CHANGELOG_OPT_REC_UINT32:
data = &co->co_uint32;
break;
}
if (co->co_convert)
offset += co->co_convert (data,
buffer + offset, encode);
else /* no coversion: write it out as it is */
CHANGELOG_FILL_BUFFER (buffer, offset,
data, co->co_len);
}
*off = offset;
}
int
changelog_encode_ascii (xlator_t *this, changelog_log_data_t *cld)
{
size_t off = 0;
size_t gfid_len = 0;
char *gfid_str = NULL;
char *buffer = NULL;
changelog_priv_t *priv = NULL;
priv = this->private;
gfid_str = uuid_utoa (cld->cld_gfid);
gfid_len = strlen (gfid_str);
/* extra bytes for decorations */
buffer = alloca (gfid_len + cld->cld_ptr_len + 10);
CHANGELOG_STORE_ASCII (priv, buffer,
off, gfid_str, gfid_len, cld);
if (cld->cld_xtra_records)
changelog_encode_write_xtra (cld, buffer, &off, _gf_true);
CHANGELOG_FILL_BUFFER (buffer, off, "\0", 1);
return changelog_write_change (priv, buffer, off);
}
int
changelog_encode_binary (xlator_t *this, changelog_log_data_t *cld)
{
size_t off = 0;
char *buffer = NULL;
changelog_priv_t *priv = NULL;
priv = this->private;
/* extra bytes for decorations */
buffer = alloca (sizeof (uuid_t) + cld->cld_ptr_len + 10);
CHANGELOG_STORE_BINARY (priv, buffer, off, cld->cld_gfid, cld);
if (cld->cld_xtra_records)
changelog_encode_write_xtra (cld, buffer, &off, _gf_false);
CHANGELOG_FILL_BUFFER (buffer, off, "\0", 1);
return changelog_write_change (priv, buffer, off);
}
static struct changelog_encoder
cb_encoder[] = {
[CHANGELOG_ENCODE_BINARY] =
{
.encoder = CHANGELOG_ENCODE_BINARY,
.encode = changelog_encode_binary,
},
[CHANGELOG_ENCODE_ASCII] =
{
.encoder = CHANGELOG_ENCODE_ASCII,
.encode = changelog_encode_ascii,
},
};
void
changelog_encode_change(changelog_priv_t *priv)
{
priv->ce = &cb_encoder[priv->encode_mode];
}
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