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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/glusterfs.h>
#include <glusterfs/common-utils.h>
#define CHANGELOG_MAX_TYPE 4
#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 xxh64[GF_XXH64_DIGEST_LENGTH * 2 + 1] = { \
0, \
}; \
gf_xxh64_wrapper((unsigned char *)brick_path, strlen(brick_path), \
GF_XXHSUM64_DEFAULT_SEED, xxh64); \
(void)snprintf(sockpath, len, CHANGELOG_UNIX_SOCK, xxh64); \
} while (0)
#define CHANGELOG_MAKE_TMP_SOCKET_PATH(brick_path, sockpath, len) \
do { \
unsigned long pid = 0; \
char xxh64[GF_XXH64_DIGEST_LENGTH * 2 + 1] = { \
0, \
}; \
pid = (unsigned long)getpid(); \
gf_xxh64_wrapper((unsigned char *)brick_path, strlen(brick_path), \
GF_XXHSUM64_DEFAULT_SEED, xxh64); \
(void)snprintf(sockpath, len, CHANGELOG_TMP_UNIX_SOCK, xxh64, pid); \
} while (0)
/**
* ... used by libgfchangelog.
*/
#define CHANGELOG_GET_HEADER_INFO(fd, buffer, len, enc, maj, min, elen) \
do { \
FILE *fp; \
int fd_dup; \
\
enc = -1; \
maj = -1; \
min = -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 { \
sys_close(fd_dup); \
} \
} \
} while (0)
#define CHANGELOG_FILL_HTIME_DIR(changelog_dir, path) \
do { \
snprintf(path, sizeof(path), "%s/htime", changelog_dir); \
} while (0)
#define CHANGELOG_FILL_CSNAP_DIR(changelog_dir, path) \
do { \
snprintf(path, sizeof(path), "%s/csnap", changelog_dir); \
} while (0)
/**
* everything after 'CHANGELOG_TYPE_METADATA_XATTR' are internal types
* (ie. none of the fops trigger this type of event), hence
* CHANGELOG_MAX_TYPE = 4
*/
typedef enum {
CHANGELOG_TYPE_DATA = 0,
CHANGELOG_TYPE_METADATA,
CHANGELOG_TYPE_ENTRY,
CHANGELOG_TYPE_METADATA_XATTR,
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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