QUORU...IALIZE(3)

💖 QUORU...IALIZE(3) 💖

okay bestie, welcome to the corosync cluster engine programmer's manual, and specifically the part about quorum_initialize. it's giving ✨*connection era*✨. buckle up 🎀

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🌸 NAME 🌸

quorum_initialize — Create a new connection to the Quorum service

like, it literally just... makes you a connection. to Quorum. the whole thing. no cap.

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✨ SYNOPSIS ✨

#include <corosync/quorum.h>

int quorum_initialize(quorum_handle_t *handle, quorum_callbacks_t
*callbacks, uint32_t *quorum_type);

three args, one header, and you're in. slay 💅

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🦋 DESCRIPTION 🦋

so. the quorum_initialize function is used to initialize a connection to the quorum API. that's the whole vibe. it's the entry point, the main character, the moment before everything happens 💖

ngl, each application may have several connections to the quorum API. not just one. multiple. obsessed. and each application uses the handle argument to uniquely identify the connection. that handle then gets passed into other function calls to identify which connection you're using to talk to the quorum service. so like, don't lose track of your handles, bestie, they're your little IDs 🎀

every time the voting configuration changes — e.g. a node joins or leaves the cluster — or the quorum status changes, the callback gets called. fr fr. every time. the callback function is described by these type definitions:

typedef void (*quorum_notification_fn_t) (
        quorum_handle_t handle,
        uint32_t quorate,
        uint64_t ring_seq,
        uint32_t view_list_entries,
        uint32_t *view_list
        );

and the callbacks argument is of the type:

typedef struct {
        quorum_notification_fn_t quorum_notify_fn;
} quorum_callbacks_t;

so basically you hand over a struct with one field in it, quorum_notify_fn, and that's the function that gets pinged when stuff changes. iconic honestly 🌈

now. the quorum_type argument gets set to one of these:

#define QUORUM_FREE     0
#define QUORUM_SET      1

• QUORUM_FREE value 0 — this means no quorum algorithm is loaded and no callbacks will take place. it's quiet. it's chillin. nothing's happening 🍓
• QUORUM_SET value 1 — this means one quorum algorithm is configured and callbacks will take place. we're LIVE, bestie 🔥

and when a configuration change occurs, the callback is called from the quorum_dispatch() function. so that's where the magic actually happens — quorum_initialize sets you up, quorum_dispatch() delivers the tea ☕

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👑 RETURN VALUE 👑

this call returns the CS_OK value if successful, otherwise an error is returned. simple as that. if it works, you get CS_OK. if it doesn't, you get a whole error situation. vibe check failed 💀

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💜 ERRORS 💜

here's the full lineup of ways this can go sideways, no skipping any of them:

• CS_ERR_TRY_AGAIN — Resource temporarily unavailable
• CS_ERR_INVALID_PARAM — Invalid argument
• CS_ERR_ACCESS — Permission denied
• CS_ERR_LIBRARY — The connection failed
• CS_ERR_INTERRUPT — System call interrupted by a signal
• CS_ERR_NOT_SUPPORTED — The requested protocol/functionality not supported
• CS_ERR_MESSAGE_ERROR — Incorrect auth message received
• CS_ERR_NO_MEMORY — Not enough memory to complete the requested task

lowkey if you're seeing CS_ERR_NO_MEMORY it's not personal, it's just... the memory. it's not there. 😭

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🌟 SEE ALSO 🌟

go read these next, bestie, they're all in the family:

• quorum_overview(3)
• quorum_model_initialize(3)
• quorum_finalize(3)
• quorum_getquorate(3)
• quorum_trackstart(3)
• quorum_trackstop(3)
• quorum_fd_get(3)
• quorum_dispatch(3)
• quorum_context_set(3)
• quorum_context_get(3)

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and that's the whole page, periodt. 💅✨ this was the corosync Man Page, dated 2026-09-04 — go forth and initialize your quorum connections, you absolute icon 🫶🌈