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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.
*/
#ifndef _CHANGELOG_MISC_H
#define _CHANGELOG_MISC_H
#include "glusterfs.h"
#include "common-utils.h"
#define CHANGELOG_MAX_TYPE 3
#define CHANGELOG_FILE_NAME "CHANGELOG"
#define HTIME_FILE_NAME "HTIME"
#define CSNAP_FILE_NAME "CHANGELOG.SNAP"
#define HTIME_KEY "trusted.glusterfs.htime"
#define HTIME_CURRENT "trusted.glusterfs.current_htime"
#define HTIME_INITIAL_VALUE "0:0"
#define CHANGELOG_VERSION_MAJOR 1
#define CHANGELOG_VERSION_MINOR 2
#define CHANGELOG_UNIX_SOCK DEFAULT_VAR_RUN_DIRECTORY"/changelog-%s.sock"
#define CHANGELOG_TMP_UNIX_SOCK DEFAULT_VAR_RUN_DIRECTORY"/.%s%lu.sock"
/**
* header starts with the version and the format of the changelog.
* 'version' not much of a use now.
*/
#define CHANGELOG_HEADER \
"GlusterFS Changelog | version: v%d.%d | encoding : %d\n"
#define CHANGELOG_MAKE_SOCKET_PATH(brick_path, sockpath, len) do { \
char md5_sum[MD5_DIGEST_LENGTH*2+1] = {0,}; \
md5_wrapper((unsigned char *) brick_path, \
strlen(brick_path), \
md5_sum); \
(void) snprintf (sockpath, len, \
CHANGELOG_UNIX_SOCK, md5_sum); \
} while (0)
#define CHANGELOG_MAKE_TMP_SOCKET_PATH(brick_path, sockpath, len) do { \
unsigned long pid = 0; \
char md5_sum[MD5_DIGEST_LENGTH*2+1] = {0,}; \
pid = (unsigned long) getpid (); \
md5_wrapper((unsigned char *) brick_path, \
strlen(brick_path), \
md5_sum); \
(void) snprintf (sockpath, \
len, CHANGELOG_TMP_UNIX_SOCK, \
md5_sum, pid); \
} while (0)
/**
* ... used by libgfchangelog.
*/
#define CHANGELOG_GET_ENCODING(fd, buffer, len, enc, enc_len) do { \
FILE *fp; \
int fd_dup, maj, min; \
\
enc = -1; \
fd_dup = dup (fd); \
\
if (fd_dup != -1) { \
fp = fdopen (fd_dup, "r"); \
if (fp) { \
if (fgets (buffer, len, fp)) { \
elen = strlen (buffer); \
sscanf (buffer, \
CHANGELOG_HEADER, \
&maj, &min, &enc); \
} \
fclose (fp); \
} else { \
close (fd_dup); \
} \
} \
} while (0)
#define CHANGELOG_FILL_HTIME_DIR(changelog_dir, path) do { \
strncpy (path, changelog_dir, sizeof (path) - 1); \
strcat (path, "/htime"); \
} while(0)
#define CHANGELOG_FILL_CSNAP_DIR(changelog_dir, path) do { \
strncpy (path, changelog_dir, sizeof (path) - 1); \
strcat (path, "/csnap"); \
} while(0)
/**
* everything after 'CHANGELOG_TYPE_ENTRY' are internal types
* (ie. none of the fops trigger this type of event), hence
* CHANGELOG_MAX_TYPE = 3
*/
typedef enum {
CHANGELOG_TYPE_DATA = 0,
CHANGELOG_TYPE_METADATA,
CHANGELOG_TYPE_ENTRY,
CHANGELOG_TYPE_ROLLOVER,
CHANGELOG_TYPE_FSYNC,
} changelog_log_type;
/* operation modes - RT for now */
typedef enum {
CHANGELOG_MODE_RT = 0,
} changelog_mode_t;
/* encoder types */
typedef enum {
CHANGELOG_ENCODE_MIN = 0,
CHANGELOG_ENCODE_BINARY,
CHANGELOG_ENCODE_ASCII,
CHANGELOG_ENCODE_MAX,
} changelog_encoder_t;
#define CHANGELOG_VALID_ENCODING(enc) \
(enc > CHANGELOG_ENCODE_MIN && enc < CHANGELOG_ENCODE_MAX)
#define CHANGELOG_TYPE_IS_ENTRY(type) (type == CHANGELOG_TYPE_ENTRY)
#define CHANGELOG_TYPE_IS_ROLLOVER(type) (type == CHANGELOG_TYPE_ROLLOVER)
#define CHANGELOG_TYPE_IS_FSYNC(type) (type == CHANGELOG_TYPE_FSYNC)
#endif /* _CHANGELOG_MISC_H */
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