is_valid_soft_transition(9)

💅 is_valid_soft_transition(9) — a Kernel API Manual moment ✨

okay so bestie, welcome to the Kernel API Manual, where we check whether DRBD is emotionally available for a state change 🎀 like, is this transition valid or is it giving "absolutely not"? Let's get into it 🦋

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🌸 NAME 🌸

is_valid_soft_transition — returns an SS_ error code if the state transition is not possible 💀

this function is literally the bouncer at the club: it limits state transitions that may be declined by DRBD. i.e. user requests (aka soft transitions) 🫶 so like, the soft asks, not the "do it anyway" ones, ykwim? iykyk ✨

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⭐ SYNOPSIS ⭐

enum drbd_state_rv is_valid_soft_transition (union drbd_state os , union drbd_state ns , struct drbd_connection *connection );

that's the whole vibe check right there 🔥 you hand it an old state, a new state, and a connection, and it tells you whether the glow-up is legal 🌈

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🎀 ARGUMENTS 🎀

• os — old state. like, the current lewk 👑
• ns — new state. the fit you're tryna switch into 💖
• connection — DRBD connection. the situationship linking everything together 🫶

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💜 SEE ALSO 💜

kernel file ./drivers/block/drbd/drbd_state.c — that's the source of truth, bestie, go read it 📖✨

and the whole friend group:

• cl_wide_st_chg(9)
• drbd_force_state(9)
• drbd_req_state(9)
• _drbd_request_state(9)
• is_valid_state(9)
• is_valid_transition(9)
• sanitize_state(9)
• _drbd_set_state(9)
• after_state_ch(9)

like, they all ate, honestly 💅

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ngl this one's short but it's iconic — no cap, every one of those functions is part of the same drbd_state.c lore 🧚

and that's the page, bestie!! this was is_valid_soft_transition(9) from the Kernel API Manual, brought to you by ./drivers/block/drbd and dated October 2026 🍓 mwah, go slay your state transitions 💖🎀