glusterfs

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/*
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   Copyright (c) 2016 Red Hat, Inc. <http://www.redhat.com>
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   This file is part of GlusterFS.
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   This file is licensed to you under your choice of the GNU Lesser
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   General Public License, version 3 or any later version (LGPLv3 or
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   later), or the GNU General Public License, version 2 (GPLv2), in all
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   cases as published by the Free Software Foundation.
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*/
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#include "glusterd.h"
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#include "glusterd-utils.h"
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#include "glusterd-tierd-svc-helper.h"
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#include "glusterd-messages.h"
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#include <glusterfs/syscall.h>
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#include "glusterd-volgen.h"
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void
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glusterd_svc_build_tierd_rundir(glusterd_volinfo_t *volinfo, char *path,
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                                int path_len)
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{
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    char workdir[PATH_MAX] = {
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        0,
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    };
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    glusterd_conf_t *priv = THIS->private;
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    GLUSTERD_GET_TIER_DIR(workdir, volinfo, priv);
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    snprintf(path, path_len, "%s/run", workdir);
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}
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void
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glusterd_svc_build_tierd_socket_filepath(glusterd_volinfo_t *volinfo,
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                                         char *path, int path_len)
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{
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    char sockfilepath[PATH_MAX] = {
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        0,
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    };
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    char rundir[PATH_MAX] = {
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        0,
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    };
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    int32_t len = 0;
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    glusterd_svc_build_tierd_rundir(volinfo, rundir, sizeof(rundir));
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    len = snprintf(sockfilepath, sizeof(sockfilepath), "%s/run-%s", rundir,
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                   uuid_utoa(MY_UUID));
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    if ((len < 0) || (len >= sizeof(sockfilepath))) {
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        sockfilepath[0] = 0;
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    }
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    glusterd_set_socket_filepath(sockfilepath, path, path_len);
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}
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void
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glusterd_svc_build_tierd_pidfile(glusterd_volinfo_t *volinfo, char *path,
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                                 int path_len)
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{
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    char rundir[PATH_MAX] = {
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        0,
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    };
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    glusterd_svc_build_tierd_rundir(volinfo, rundir, sizeof(rundir));
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    snprintf(path, path_len, "%s/%s-tierd.pid", rundir, volinfo->volname);
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}
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void
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glusterd_svc_build_tierd_volfile_path(glusterd_volinfo_t *volinfo, char *path,
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                                      int path_len)
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{
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    char workdir[PATH_MAX] = {
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        0,
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    };
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    glusterd_conf_t *priv = THIS->private;
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    GLUSTERD_GET_VOLUME_DIR(workdir, volinfo, priv);
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    snprintf(path, path_len, "%s/%s-tierd.vol", workdir, volinfo->volname);
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}
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void
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glusterd_svc_build_tierd_logdir(char *logdir, char *volname, size_t len)
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{
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    glusterd_conf_t *conf = THIS->private;
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    snprintf(logdir, len, "%s/tier/%s", priv->logdir, volname);
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}
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void
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glusterd_svc_build_tierd_logfile(char *logfile, char *logdir, size_t len)
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{
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    snprintf(logfile, len, "%s/tierd.log", logdir);
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}
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int
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glusterd_svc_check_tier_volfile_identical(char *svc_name,
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                                          glusterd_volinfo_t *volinfo,
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                                          gf_boolean_t *identical)
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{
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    char orgvol[PATH_MAX] = {
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        0,
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    };
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    char *tmpvol = NULL;
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    xlator_t *this = THIS;
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    int ret = -1;
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    int need_unlink = 0;
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    int tmp_fd = -1;
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    GF_VALIDATE_OR_GOTO(this->name, identical, out);
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    glusterd_svc_build_tierd_volfile_path(volinfo, orgvol, sizeof(orgvol));
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    ret = gf_asprintf(&tmpvol, "/tmp/g%s-XXXXXX", svc_name);
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    if (ret < 0) {
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        goto out;
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    }
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    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
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    tmp_fd = mkstemp(tmpvol);
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    if (tmp_fd < 0) {
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        gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
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               "Unable to create temp file"
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               " %s:(%s)",
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               tmpvol, strerror(errno));
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        ret = -1;
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        goto out;
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    }
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    need_unlink = 1;
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    ret = build_rebalance_volfile(volinfo, tmpvol, NULL);
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    if (ret)
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        goto out;
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    ret = glusterd_check_files_identical(orgvol, tmpvol, identical);
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    if (ret)
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        goto out;
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out:
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    if (need_unlink)
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        sys_unlink(tmpvol);
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    if (tmpvol != NULL)
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        GF_FREE(tmpvol);
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    if (tmp_fd >= 0)
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        sys_close(tmp_fd);
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    return ret;
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}
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int
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glusterd_svc_check_tier_topology_identical(char *svc_name,
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                                           glusterd_volinfo_t *volinfo,
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                                           gf_boolean_t *identical)
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{
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    char orgvol[PATH_MAX] = {
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        0,
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    };
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    char *tmpvol = NULL;
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    glusterd_conf_t *conf = NULL;
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    xlator_t *this = THIS;
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    int ret = -1;
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    int tmpclean = 0;
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    int tmpfd = -1;
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    if ((!identical) || (!this->private))
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        goto out;
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    conf = this->private;
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    GF_VALIDATE_OR_GOTO(this->name, conf, out);
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    glusterd_svc_build_tierd_volfile_path(volinfo, orgvol, sizeof(orgvol));
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    ret = gf_asprintf(&tmpvol, "/tmp/g%s-XXXXXX", svc_name);
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    if (ret < 0) {
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        goto out;
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    }
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    /* coverity[SECURE_TEMP] mkstemp uses 0600 as the mode and is safe */
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    tmpfd = mkstemp(tmpvol);
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    if (tmpfd < 0) {
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        gf_msg(this->name, GF_LOG_WARNING, errno, GD_MSG_FILE_OP_FAILED,
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               "Unable to create temp file"
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               " %s:(%s)",
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               tmpvol, strerror(errno));
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        ret = -1;
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        goto out;
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    }
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    tmpclean = 1; /* SET the flag to unlink() tmpfile */
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    ret = build_rebalance_volfile(volinfo, tmpvol, NULL);
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    if (ret)
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        goto out;
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    /* Compare the topology of volfiles */
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    ret = glusterd_check_topology_identical(orgvol, tmpvol, identical);
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out:
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    if (tmpfd >= 0)
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        sys_close(tmpfd);
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    if (tmpclean)
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        sys_unlink(tmpvol);
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    if (tmpvol != NULL)
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        GF_FREE(tmpvol);
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    return ret;
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}
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