veth_pool_store(9)

🌸 veth_pool_store(9) — sysfs store handler for pool attributes 💅

okay so bestie, this page is straight out of the Kernel API Manual, and it’s lowkey all about storing values in pool attributes without breaking the vibe. iykyk. ✨

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✨ NAME ✨

• veth_pool_store — sysfs store handler for pool attributes 🫶

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🦋 SYNOPSIS 🦋

ssize_t veth_pool_store (struct kobject *kobj , struct attribute *attr ,
       const char *buf , size_t count );

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💅 ARGUMENTS 💅

• kobj — kobject embedded in pool 👑
• attr — attribute being changed 💫
• buf — value being stored 🎀
• count — length of buf in bytes 🌸

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🌈 DESCRIPTION 🌈

okay so this handler stores a new value in a pool attribute. it verifies the range of the new value for size and buff_size — like, make sure the numbers are actually behaving. it also verifies that at least one pool remains available to receive MTU-sized packets. no cap, that last check is the whole vibe check for your buffer pools. 💅🔥

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🧚 CONTEXT 🧚

Process context, bestie. it takes and releases rtnl_mutex to ensure correct ordering of close and open calls. literally locking the group chat so the open/close gossip doesn’t get scrambled. 🫶

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🔥 RETURN 🔥

• -EPERM — Not allowed to disabled all MTU-sized buffer pools 😭
• -EINVAL — New pool size or buffer size is out of range 🚫
• count — Return count for success ✅
• other — Return value from a failed ibmveth_open call 💀

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👑 SEE ALSO 👑

Kernel file ./drivers/net/ethernet/ibm/ibmveth.c — that’s the main character file, fr fr. 🌟

ibmveth_remove_buffer_from_pool(9), ibmveth_rxq_harvest_buffer(9), ibmveth_reset(9), ibmveth_get_desired_dma(9), ibmveth_reset_kunit(9), ibmveth_remove_buffer_from_pool_test(9), ibmveth_rxq_get_buffer_test(9) ✨

💖 source/version: ./drivers/net/ethernet/ibm · date: October 2026 — that’s the cute little footer sign-off, bestie. periodt. 🎀