nfs4_replay_free_cache(9)

🌸 nfs4_replay_free_cache(9) — kernel API manual energy 🌸

okay so bestie, we're in section 9 of the kernel API manual today, and the star of the show is nfs4_replay_free_cache 💅 don't worry, she's way less intimidating than the name suggests, i promise 🫶

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✨ NAME ✨

nfs4_replay_free_cache — release dynamically allocated replay buffer 🎀

like, the whole job. she frees. she resets. she goes home. periodt.

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🌈 SYNOPSIS 🌈

void nfs4_replay_free_cache (struct nfs4_replay *rp );

nothing returned, no drama, just vibes and one pointer 👑

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🦋 ARGUMENTS 🦋

• rp — the replay cache you wanna reset, bestie. that's it. that's the whole argument 🍓

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💜 DESCRIPTION 💜

okay so here's the tea ☕

if rp->rp_buf points to a kmalloc'd buffer, she frees it and resets rp_buf to the inline rp_ibuf. so cute, so tidy, no leaks left on read 🔥

and the way that she always zeroes rp_buflen? iconic. no notes. literally always, no cap ✨

ngl the "always" is doing a lot of work there — rp_buflen gets zeroed whether or not the free actually happened, and that's on purpose 💀

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🧚 SEE ALSO 🧚

the kernel file ./fs/nfsd/nfs4state.c and honestly her entire friend group, all of them show up:

• nfs4_delegation_exists(9)
• hash_delegation_locked(9)
• revoke_delegation(9)
• nfsd4_revoke_states(9)
• nfsd4_revoke_export_states(9)
• nfsd_slot_shrinker_count(9)
• nfsd_slot_shrinker_scan(9)
• nfsd4_put_client(9)
• nfsd_wait_for_delegreturn(9)
• nfsd_breaker_owns_lease(9)
• nfsd4_deleg_lm_open_conflict(9)
• nfsd4_process_open2(9)
• nfsd4_force_end_grace(9)
• nfs4_preprocess_stateid_op(9)
• nfs4_preprocess_seqid_op(9)
• nfsd4_release_lockowner(9)
• nfsd4_vet_deleg_time(9)
• nfsd4_deleg_getattr_conflict(9)
• nfsd_get_dir_deleg(9)
• nfsd_update_cmtime_attr(9)

twenty of them. twenty!! a whole group chat 😭 and that's the delegation/shrinker/state cluster, iykyk 💖

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aaaaand that's the page, bestie 🎀 this one came out of ./fs/nfsd, dated October 2026, and she lives in section 9 of the Kernel API Manual — slay, go free those buffers responsibly 💅✨🦋