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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 _GF_CHANGELOG_H
#define _GF_CHANGELOG_H
struct gf_brick_spec;
/**
* Max bit shiter for event selection
*/
#define CHANGELOG_EV_SELECTION_RANGE 5
#define CHANGELOG_OP_TYPE_JOURNAL (1<<0)
#define CHANGELOG_OP_TYPE_OPEN (1<<1)
#define CHANGELOG_OP_TYPE_CREATE (1<<2)
#define CHANGELOG_OP_TYPE_RELEASE (1<<3)
#define CHANGELOG_OP_TYPE_BR_RELEASE (1<<4) /* logical release (last close()),
sent by bitrot stub */
#define CHANGELOG_OP_TYPE_MAX (1<<CHANGELOG_EV_SELECTION_RANGE)
struct ev_open {
unsigned char gfid[16];
int32_t flags;
};
struct ev_creat {
unsigned char gfid[16];
int32_t flags;
};
struct ev_release {
unsigned char gfid[16];
};
struct ev_release_br {
int32_t flags;
unsigned long version;
unsigned char gfid[16];
};
struct ev_changelog {
char path[PATH_MAX];
};
typedef struct changelog_event {
unsigned int ev_type;
union {
struct ev_open open;
struct ev_creat create;
struct ev_release release;
struct ev_changelog journal;
struct ev_release_br releasebr;
} u;
} changelog_event_t;
#define CHANGELOG_EV_SIZE (sizeof (changelog_event_t))
/**
* event callback, connected & disconnection defs
*/
typedef void (CALLBACK) (void *, char *,
void *, changelog_event_t *);
typedef void *(INIT) (void *, struct gf_brick_spec *);
typedef void (FINI) (void *, char *, void *);
typedef void (CONNECT) (void *, char *, void *);
typedef void (DISCONNECT) (void *, char *, void *);
struct gf_brick_spec {
char *brick_path;
unsigned int filter;
INIT *init;
FINI *fini;
CALLBACK *callback;
CONNECT *connected;
DISCONNECT *disconnected;
void *ptr;
};
/* API set */
int
gf_changelog_register (char *brick_path, char *scratch_dir,
char *log_file, int log_levl, int max_reconnects);
ssize_t
gf_changelog_scan ();
int
gf_changelog_start_fresh ();
ssize_t
gf_changelog_next_change (char *bufptr, size_t maxlen);
int
gf_changelog_done (char *file);
/* newer flexible API */
int
gf_changelog_init (void *xl);
int
gf_changelog_register_generic (struct gf_brick_spec *bricks, int count,
int ordered, char *logfile, int lvl, void *xl);
#endif
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