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Hou Tao 532d6b36b2 bpf: Handle in-place update for full LPM trie correctly
When a LPM trie is full, in-place updates of existing elements
incorrectly return -ENOSPC.

Fix this by deferring the check of trie->n_entries. For new insertions,
n_entries must not exceed max_entries. However, in-place updates are
allowed even when the trie is full.

Fixes: b95a5c4db0 ("bpf: add a longest prefix match trie map implementation")
Reviewed-by: Toke Høiland-Jørgensen <toke@redhat.com>
Signed-off-by: Hou Tao <houtao1@huawei.com>
Link: https://lore.kernel.org/r/20241206110622.1161752-5-houtao@huaweicloud.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
2024-12-06 09:14:26 -08:00
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kernel bpf: Handle in-place update for full LPM trie correctly 2024-12-06 09:14:26 -08:00
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net tcp_bpf: Fix the sk_mem_uncharge logic in tcp_bpf_sendmsg 2024-11-26 20:37:46 +01:00
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samples samples/bpf: Remove unnecessary -I flags from libbpf EXTRA_CFLAGS 2024-12-03 13:29:04 -08:00
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tools selftests/bpf: Add test for narrow spill into 64-bit spilled scalar 2024-12-04 09:19:50 -08:00
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Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.