[dm-devel] [PATCH 17/35] multipathd: uxlsnr: use symbolic values for pollfd indices
mwilck at suse.com
mwilck at suse.com
Fri Sep 10 11:41:02 UTC 2021
From: Martin Wilck <mwilck at suse.com>
Avoid hardcoding the indices as 0, 1, 2...
Signed-off-by: Martin Wilck <mwilck at suse.com>
---
multipathd/uxlsnr.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff --git a/multipathd/uxlsnr.c b/multipathd/uxlsnr.c
index 7e88538..6506109 100644
--- a/multipathd/uxlsnr.c
+++ b/multipathd/uxlsnr.c
@@ -46,8 +46,13 @@ struct client {
int fd;
};
-/* The number of fds we poll on, other than individual client connections */
-#define POLLFDS_BASE 2
+/* Indices for array of poll fds */
+enum {
+ POLLFD_UX = 0,
+ POLLFD_NOTIFY,
+ POLLFDS_BASE,
+};
+
#define POLLFD_CHUNK (4096 / sizeof(struct pollfd))
/* Minimum mumber of pollfds to reserve for clients */
#define MIN_POLLS (POLLFD_CHUNK - POLLFDS_BASE)
@@ -339,8 +344,8 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, long ux_sock,
}
}
if (num_clients < MAX_CLIENTS) {
- polls[0].fd = ux_sock;
- polls[0].events = POLLIN;
+ polls[POLLFD_UX].fd = ux_sock;
+ polls[POLLFD_UX].events = POLLIN;
} else {
/*
* New clients can't connect, num_clients won't grow
@@ -348,15 +353,15 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, long ux_sock,
*/
condlog(1, "%s: max client connections reached, pausing polling",
__func__);
- polls[0].fd = -1;
+ polls[POLLFD_UX].fd = -1;
}
reset_watch(notify_fd, &wds, &sequence_nr);
if (notify_fd == -1 || (wds.conf_wd == -1 && wds.dir_wd == -1))
- polls[1].fd = -1;
+ polls[POLLFD_NOTIFY].fd = -1;
else
- polls[1].fd = notify_fd;
- polls[1].events = POLLIN;
+ polls[POLLFD_NOTIFY].fd = notify_fd;
+ polls[POLLFD_NOTIFY].events = POLLIN;
/* setup the clients */
i = POLLFDS_BASE;
@@ -454,12 +459,12 @@ void * uxsock_listen(uxsock_trigger_fn uxsock_trigger, long ux_sock,
handle_signals(true);
/* see if we got a new client */
- if (polls[0].revents & POLLIN) {
+ if (polls[POLLFD_UX].revents & POLLIN) {
new_client(ux_sock);
}
/* handle inotify events on config files */
- if (polls[1].revents & POLLIN)
+ if (polls[POLLFD_NOTIFY].revents & POLLIN)
handle_inotify(notify_fd, &wds);
}
--
2.33.0
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