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https://github.com/JakeHillion/drgn.git
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557b8152cc
Add a helper to get the network device ("struct net_device *") given an
interface name. As an example:
>>> netdev = netdev_get_by_name(prog["init_net"], "lo")
>>> netdev.ifindex.value_()
1
Or pass a "Program" as the first argument, and let the helper find in
the initial network namespace (i.e. "init_net"):
>>> netdev = netdev_get_by_index(prog, "dummy0")
>>> netdev.ifindex.value_()
2
Also add a test for this new helper to tests/helpers/linux/test_net.py.
This helper simply does a linear search over the name hash table of the
network namespace, since implementing hashing in drgn is non-trivial.
It is obviously slower than net/core/dev.c:netdev_name_node_lookup() in
the kernel, but still useful.
Linux kernel commit ff92741270bf ("net: introduce name_node struct to be
used in hashlist") introduced struct netdev_name_node for name lookups.
Start by assuming that the kernel has this commit, and fall back to the
old path if that fails.
Signed-off-by: Peilin Ye <peilin.ye@bytedance.com>
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|---|---|---|
| .. | ||
| helpers | ||
| __init__.py | ||
| assembler.py | ||
| dwarf.py | ||
| dwarfwriter.py | ||
| elf.py | ||
| elfwriter.py | ||
| libdrgn.py | ||
| test_docs.py | ||
| test_dwarf.py | ||
| test_language_c.py | ||
| test_lexer.py | ||
| test_object.py | ||
| test_path.py | ||
| test_platform.py | ||
| test_program.py | ||
| test_python.py | ||
| test_serialize.py | ||
| test_type.py | ||
| test_util.py | ||