[dm-devel] [PATCH 0/4] Add "reconfigure all" multipath command

[Xose Vazquez Perez]

On 9/21/21 01:21, Benjamin Marzinski wrote:

> This patchset is supposed to replace Martin's
> 
> multipathd: add "force_reconfigure" option
> 
> patch from his uxlsnr overhaul patchset. It also makes the default
> reconfigure be a weak reconfigure, but instead of adding a configuration
> option to control this, it adds a new multipathd command,
> "reconfigure all", to do a full reconfigure. The HUP signal is left
> doing only weak reconfigures.
>   
> In order to keep from having two states that are handled nearly
> identically, the code adds an extra variable to track the type of
> configuration that was selected, but this could easily be switch to
> use a new DAEMON_CONFIGURE_ALL state instead.
>   
> The final patch, that added the new command, is meant to apply on top of
> Martin's changed client handler code. I can send one that works with the
> current client handler code, if people would rather review that.

This change is going to affect some places, raw search:

$ git grep reconfigure
libdmmp/libdmmp.c:      snprintf(cmd, _IPC_MAX_CMD_LEN, "%s", "reconfigure");
libmultipath/configure.c:        * If we are in this code path (startup or forced reconfigure),
libmultipath/foreign.h:  * don't support it. "multipathd reconfigure" starts foreign device
libmultipath/foreign.h:  * This is called if multipathd reconfigures itself.
multipath/main.c:               p += snprintf(p, n, "reconfigure");
multipathd/cli.c:       r += add_key(keys, "reconfigure", RECONFIGURE, 0);
multipathd/cli_handlers.c:cli_reconfigure(void * v, char ** reply, int * len, void * data)
multipathd/cli_handlers.c:      condlog(2, "reconfigure (operator)");
multipathd/cli_handlers.h:int cli_reconfigure(void * v, char ** reply, int * len, void * data);
multipathd/main.c:                              condlog(2, "reconfigure (delayed)");
multipathd/main.c:      set_unlocked_handler_callback(RECONFIGURE, cli_reconfigure);
multipathd/main.c:              condlog(2, "reconfigure (delayed)");
multipathd/main.c:reconfigure (struct vectors * vecs)
multipathd/main.c:              condlog(2, "reconfigure (signal)");
multipathd/main.c:                              reconfigure(vecs);
multipathd/main.h:int reconfigure (struct vectors *);
multipathd/multipathd.8:happens, it will reconfigure the multipath map the path belongs to, so that this
multipathd/multipathd.8:.B reconfigure
multipathd/multipathd.service:ExecReload=/sbin/multipathd reconfigure
multipathd/uxlsnr.c:     * do it once per reconfigure */