ext_tree_encode_commit(9)

ext_tree_encode_commit(9)

okay so welcome to the Kernel API Manual, bestie 💖 this page is all about ext_tree_encode_commit, and its whole vibe is “encode as much as possible extents into the buffer” ✨

🎀 NAME 🎀

ext_tree_encode_commit — encode as much as possible extents into the buffer.

✨ SYNOPSIS ✨

int ext_tree_encode_commit (struct pnfs_block_layout *bl , __be32 *p ,
size_t buffer_size , size_t *count , __u64 *lastbyte );

🫶 ARGUMENTS 🫶

• bl — pointer to the layout. That’s the layout bestie in question 🦋
• p — pointer to the output buffer. This is where the encoded extents go 💅
• buffer_size — size of the output buffer. Gotta know how much room we’re working with ✨
• count — output pointer to the number of encoded extents. It reports back how many made it in 🔥
• lastbyte — output pointer to the last written byte. It points at where the writing ended up 👑

🌸 DESCRIPTION 🌸

Return values, periodt:

• 0: Success, all required extents encoded, outputs are valid 💖
• -ENOSPC: Buffer too small, some extents are encoded, outputs are valid 😭

bestie, notice that in the -ENOSPC case some extents are still encoded and the outputs are still valid — the buffer just wasn’t big enough for the whole thing 🫶

🌈 SEE ALSO 🌈

• Kernel file ./fs/nfs/blocklayout/extent_tree.c
• ext_tree_try_encode_commit(9)
• ext_tree_prepare_commit(9)

later, babes 💅 this page came from ./fs/nfs/blocklayout, dated October 2026 — mwah! 🎀