struct snapshot *s = NULL;
struct snapshot_list sl;
- current_snapshot_creation_time = 0;
dss_get_snapshot_list(&sl);
FOR_EACH_SNAPSHOT(s, i, &sl) {
if (!(s->flags & SS_COMPLETE))
{
int64_t now = get_current_time();
- assert(snapshot_creation_status == HS_READY);
if (!next_snapshot_time_is_valid())
next_snapshot_time = compute_next_snapshot_time();
if (next_snapshot_time <= now) {
assert(snapshot_creation_status == HS_READY);
/* make sure that the next snapshot time will be recomputed */
invalidate_next_snapshot_time();
- if (!conf.pre_create_hook_given) {
- snapshot_creation_status = HS_PRE_SUCCESS;
- return 0;
- }
DSS_DEBUG_LOG("executing %s\n", conf.pre_create_hook_arg);
ret = dss_exec_cmdline_pid(&create_pid,
conf.pre_create_hook_arg, fds);
*snapshot_currently_being_removed = *s;
snapshot_currently_being_removed->name = dss_strdup(s->name);
- if (!conf.pre_remove_hook_given) {
- snapshot_removal_status = HS_PRE_SUCCESS;
- return 0;
- }
cmd = make_message("%s %s/%s", conf.pre_remove_hook_arg,
conf.dest_dir_arg, s->name);
DSS_DEBUG_LOG("executing %s\n", cmd);
- ret = dss_exec_cmdline_pid(&remove_pid,
- conf.pre_remove_hook_arg, fds);
+ ret = dss_exec_cmdline_pid(&remove_pid, cmd, fds);
free(cmd);
if (ret < 0)
return ret;
int ret, fds[3] = {0, 0, 0};
char *cmd;
- if (!conf.post_create_hook_given) {
- snapshot_creation_status = HS_READY;
- return 0;
- }
cmd = make_message("%s %s/%s", conf.post_create_hook_arg,
conf.dest_dir_arg, path_to_last_complete_snapshot);
DSS_NOTICE_LOG("executing %s\n", cmd);
assert(s);
- if (!conf.post_remove_hook_given) {
- snapshot_removal_status = HS_READY;
- return 0;
- }
cmd = make_message("%s %s/%s", conf.post_remove_hook_arg,
conf.dest_dir_arg, s->name);
DSS_NOTICE_LOG("executing %s\n", cmd);
return ret;
}
-static void kill_process(pid_t pid)
+static void dss_kill(pid_t pid, int sig, const char *msg)
{
- if (!pid)
+ const char *signame, *process_name;
+
+ if (pid == 0)
+ return;
+ switch (sig) {
+ case SIGTERM: signame = "TERM"; break;
+ case SIGSTOP: signame = "STOP"; break;
+ case SIGCONT: signame = "CONT"; break;
+ default: signame = "????";
+ }
+
+ if (pid == create_pid)
+ process_name = "create";
+ else if (pid == remove_pid)
+ process_name = "remove";
+ else process_name = "??????";
+
+ if (msg)
+ DSS_INFO_LOG("%s\n", msg);
+ DSS_DEBUG_LOG("sending signal %d (%s) to pid %d (%s process)\n",
+ sig, signame, (int)pid, process_name);
+ if (kill(pid, sig) >= 0)
return;
- DSS_WARNING_LOG("sending SIGTERM to pid %d\n", (int)pid);
- kill(pid, SIGTERM);
+ DSS_INFO_LOG("failed to send signal %d (%s) to pid %d (%s process)\n",
+ sig, signame, (int)pid, process_name);
}
static void stop_create_process(void)
{
- if (!create_pid || create_process_stopped)
+ if (create_process_stopped)
return;
- kill(SIGSTOP, create_pid);
+ dss_kill(create_pid, SIGSTOP, "suspending create process");
create_process_stopped = 1;
}
static void restart_create_process(void)
{
- if (!create_pid || !create_process_stopped)
+ if (!create_process_stopped)
return;
- kill (SIGCONT, create_pid);
+ dss_kill(create_pid, SIGCONT, "resuming create process");
create_process_stopped = 0;
}
}
}
/* SIGINT or SIGTERM */
- DSS_WARNING_LOG("sending SIGTERM to pid %d\n", (int)pid);
- kill(pid, SIGTERM);
+ dss_kill(pid, SIGTERM, "killing child process");
}
if (ret < 0)
DSS_ERROR_LOG("failed to wait for process %d\n", (int)pid);
snapshot_removal_status = HS_READY;
return -E_BAD_EXIT_CODE;
}
- if (conf.post_remove_hook_given)
- snapshot_removal_status = HS_SUCCESS;
- else
- snapshot_removal_status = HS_READY;
+ snapshot_removal_status = HS_SUCCESS;
return 1;
}
free(name_of_reference_snapshot);
name_of_reference_snapshot = NULL;
out:
- create_pid = 0;
create_process_stopped = 0;
return ret;
}
snapshot_creation_status = HS_PRE_SUCCESS;
ret = 1;
out:
- create_pid = 0;
return ret;
}
if (pid == create_pid) {
switch (snapshot_creation_status) {
case HS_PRE_RUNNING:
- return handle_pre_create_hook_exit(status);
+ ret = handle_pre_create_hook_exit(status);
+ break;
case HS_RUNNING:
- return handle_rsync_exit(status);
+ ret = handle_rsync_exit(status);
+ break;
case HS_POST_RUNNING:
snapshot_creation_status = HS_READY;
- return 1;
+ ret = 1;
+ break;
default:
DSS_EMERG_LOG("BUG: create can't die in status %d\n",
snapshot_creation_status);
return -E_BUG;
}
+ create_pid = 0;
+ return ret;
}
if (pid == remove_pid) {
ret = handle_remove_exit(status);
log_welcome(conf.loglevel_arg);
}
DSS_DEBUG_LOG("loglevel: %d\n", conf.loglevel_arg);
-// cmdline_parser_dump(logfile? logfile : stdout, &conf);
ret = config_file_exists;
out:
free(config_file);
return dss_chdir(conf.dest_dir_arg);
}
+static void dump_dss_config(const char *msg)
+{
+ if (conf.loglevel_arg > INFO)
+ return;
+ DSS_INFO_LOG("%s\n", msg);
+ cmdline_parser_dump(logfile? logfile : stderr, &conf);
+}
+
static int handle_sighup(void)
{
int ret;
- DSS_NOTICE_LOG("SIGHUP\n");
+ DSS_NOTICE_LOG("SIGHUP, re-reading config\n");
+ dump_dss_config("current config");
ret = parse_config_file(1);
if (ret < 0)
return ret;
+ dump_dss_config("new config");
invalidate_next_snapshot_time();
return change_to_dest_dir();
}
case SIGINT:
case SIGTERM:
restart_create_process();
- kill_process(create_pid);
- kill_process(remove_pid);
+ dss_kill(create_pid, SIGTERM, NULL);
+ dss_kill(remove_pid, SIGTERM, NULL);
ret = -E_SIGNAL;
break;
case SIGHUP:
return 1;
}
+static int rename_resume_snap(int64_t creation_time)
+{
+ struct snapshot_list sl = {.num_snapshots = 0};
+ struct snapshot *s;
+ char *new_name = incomplete_name(creation_time);
+ int ret;
+
+ ret = 0;
+ if (conf.no_resume_given)
+ goto out;
+ dss_get_snapshot_list(&sl);
+ s = get_newest_snapshot(&sl);
+ if (!s)
+ goto out;
+ if ((s->flags & SS_COMPLETE) != 0) /* complete */
+ goto out;
+ DSS_INFO_LOG("resuming: reusing %s as destination dir\n", s->name);
+ ret = dss_rename(s->name, new_name);
+out:
+ if (ret >= 0)
+ DSS_NOTICE_LOG("creating new snapshot %s\n", new_name);
+ free(new_name);
+ free_snapshot_list(&sl);
+ return ret;
+}
+
static void create_rsync_argv(char ***argv, int64_t *num)
{
char *logname;
static int create_snapshot(char **argv)
{
int ret, fds[3] = {0, 0, 0};
- char *name;
- name = incomplete_name(current_snapshot_creation_time);
- DSS_NOTICE_LOG("creating new snapshot %s\n", name);
- free(name);
+ ret = rename_resume_snap(current_snapshot_creation_time);
+ if (ret < 0)
+ return ret;
ret = dss_exec(&create_pid, argv[0], argv, fds);
if (ret < 0)
return ret;
}
FD_ZERO(&rfds);
FD_SET(signal_pipe, &rfds);
- DSS_DEBUG_LOG("tvp: %p, tv_sec : %lu\n", tvp, (long unsigned) tv.tv_sec);
ret = dss_select(signal_pipe + 1, &rfds, NULL, tvp);
if (ret < 0)
goto out;
case HS_POST_RUNNING:
continue;
case HS_PRE_SUCCESS:
- free_rsync_argv(rsync_argv);
- create_rsync_argv(&rsync_argv, ¤t_snapshot_creation_time);
- /* fall through */
+ if (!name_of_reference_snapshot) {
+ free_rsync_argv(rsync_argv);
+ create_rsync_argv(&rsync_argv, ¤t_snapshot_creation_time);
+ }
+ ret = create_snapshot(rsync_argv);
+ if (ret < 0)
+ goto out;
+ continue;
case HS_NEEDS_RESTART:
+ if (!next_snapshot_is_due())
+ continue;
ret = create_snapshot(rsync_argv);
if (ret < 0)
goto out;
char *argv[] = {conf.exit_hook_arg, dss_strerror(-exit_code), NULL};
pid_t pid;
- if (!conf.exit_hook_given)
- return;
DSS_NOTICE_LOG("executing %s %s\n", argv[0], argv[1]);
dss_exec(&pid, conf.exit_hook_arg, argv, fds);
}
}
if (conf.daemon_given)
daemon_init();
+ dump_dss_config("dss configuration");
ret = change_to_dest_dir();
if (ret < 0)
goto out;
projects / dss.git / blobdiff