[Cluster-devel] [PATCH 10/10] dlm_controld: enable "dlm_tool run|run_start" dynamic setting feature
Heming Zhao
heming.zhao at suse.com
Sun Sep 19 06:43:22 UTC 2021
This commit gives dlm_tool the ability to change dlm_controld settings
on the fly.
Signed-off-by: Heming Zhao <heming.zhao at suse.com>
---
dlm_controld/helper.c | 41 ++++++++++++++++++++++++++++++++---------
1 file changed, 32 insertions(+), 9 deletions(-)
diff --git a/dlm_controld/helper.c b/dlm_controld/helper.c
index a20965b76195..dd03cb1c973f 100644
--- a/dlm_controld/helper.c
+++ b/dlm_controld/helper.c
@@ -48,6 +48,7 @@ do { \
#define CMD_ID_LVCHANGE_REFRESH 1
#define CMD_ID_LVS 2
+#define CMD_ID_OPT 3
static int _get_cmd_id(char **av, int av_count)
{
@@ -64,6 +65,11 @@ static int _get_cmd_id(char **av, int av_count)
return CMD_ID_LVS;
}
+ if ((av_count >= 2) &&
+ (!strcmp(av[0], "option") || !strcmp(av[0], "opt"))) {
+ return CMD_ID_OPT;
+ }
+
return 0;
}
@@ -133,19 +139,19 @@ static void _clear_running_cmd(struct running *running)
/* runs in child process that was forked by helper */
-static void exec_command(char *cmd_str, int out_fd)
+static int exec_command(char *cmd_str, int out_fd)
{
char cmd_buf[16];
char arg[ONE_ARG_LEN];
char *av[MAX_AV_COUNT + 1]; /* +1 for NULL */
int av_count = 0;
- int i, rv, arg_len, cmd_len, cmd_id;
+ int i, rv = -1, arg_len, cmd_len, cmd_id;
for (i = 0; i < MAX_AV_COUNT + 1; i++)
av[i] = NULL;
if (!cmd_str[0])
- return;
+ return rv;
/* this should already be done, but make sure */
cmd_str[RUN_COMMAND_LEN - 1] = '\0';
@@ -214,11 +220,26 @@ static void exec_command(char *cmd_str, int out_fd)
log_helper("write cmd_buf from child error %d", rv);
close(out_fd);
- /* if we return before exec, the child does exit(1) (failure) */
- if (!cmd_id)
- return;
+ switch (cmd_id) {
+ case 0:
+ /* if we return from here, the child does exit(1) (failure) */
+ rv = -1;
+ break;
+ case 1:
+ case 2:
+ rv = 0;
+ execvp(av[0], av);
+ break; /* useless */
+ case 3:
+ set_opt_online(av_count-1, av+1);
+ rv = 0;
+ break;
+ default:
+ rv = -1;
+ break;
+ }
- execvp(av[0], av);
+ return rv;
}
static int read_request(int fd, struct run_request *req)
@@ -352,8 +373,10 @@ int run_helper(int in_fd, int out_fd, int log_stderr)
pid = fork();
if (!pid) {
close(cmd_pipe[0]);
- exec_command(req.command, cmd_pipe[1]);
- exit(1);
+ if (exec_command(req.command, cmd_pipe[1]) < 0)
+ exit(1);
+ else
+ exit(0);
}
close(cmd_pipe[1]);
--
2.32.0
More information about the Cluster-devel
mailing list