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| author | Florian Fainelli <f.fainelli@gmail.com> | 2018-09-07 11:09:02 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-09-07 14:49:55 -0700 |
| commit | 98cdb480712320880d9d5d9db052990a9609427e (patch) | |
| tree | 0d459b194330e0605578c05a409674e1c5cb4e5d /net/dsa/dsa.c | |
| parent | 0fdc0d675b92ba8e0f4a5a7845b0c12c8e1baee2 (diff) | |
| download | linux-stable-98cdb480712320880d9d5d9db052990a9609427e.tar.gz linux-stable-98cdb480712320880d9d5d9db052990a9609427e.tar.bz2 linux-stable-98cdb480712320880d9d5d9db052990a9609427e.zip | |
net: dsa: Expose tagging protocol to user-space
There is no way for user-space to know what a given DSA network device's
tagging protocol is. Expose this information through a dsa/tagging
attribute which reflects the tagging protocol currently in use.
This is helpful for configuration (e.g: none behaves dramatically
different wrt. bridges) as well as for packet capture tools when there
is not a proper Ethernet type available.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dsa/dsa.c')
| -rw-r--r-- | net/dsa/dsa.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/net/dsa/dsa.c b/net/dsa/dsa.c index 9f3209ff7ffd..45f70859f550 100644 --- a/net/dsa/dsa.c +++ b/net/dsa/dsa.c @@ -70,6 +70,49 @@ const struct dsa_device_ops *dsa_device_ops[DSA_TAG_LAST] = { [DSA_TAG_PROTO_NONE] = &none_ops, }; +const char *dsa_tag_protocol_to_str(const struct dsa_device_ops *ops) +{ + const char *protocol_name[DSA_TAG_LAST] = { +#ifdef CONFIG_NET_DSA_TAG_BRCM + [DSA_TAG_PROTO_BRCM] = "brcm", +#endif +#ifdef CONFIG_NET_DSA_TAG_BRCM_PREPEND + [DSA_TAG_PROTO_BRCM_PREPEND] = "brcm-prepend", +#endif +#ifdef CONFIG_NET_DSA_TAG_DSA + [DSA_TAG_PROTO_DSA] = "dsa", +#endif +#ifdef CONFIG_NET_DSA_TAG_EDSA + [DSA_TAG_PROTO_EDSA] = "edsa", +#endif +#ifdef CONFIG_NET_DSA_TAG_KSZ + [DSA_TAG_PROTO_KSZ] = "ksz", +#endif +#ifdef CONFIG_NET_DSA_TAG_LAN9303 + [DSA_TAG_PROTO_LAN9303] = "lan9303", +#endif +#ifdef CONFIG_NET_DSA_TAG_MTK + [DSA_TAG_PROTO_MTK] = "mtk", +#endif +#ifdef CONFIG_NET_DSA_TAG_QCA + [DSA_TAG_PROTO_QCA] = "qca", +#endif +#ifdef CONFIG_NET_DSA_TAG_TRAILER + [DSA_TAG_PROTO_TRAILER] = "trailer", +#endif + [DSA_TAG_PROTO_NONE] = "none", + }; + unsigned int i; + + BUILD_BUG_ON(ARRAY_SIZE(protocol_name) != DSA_TAG_LAST); + + for (i = 0; i < ARRAY_SIZE(dsa_device_ops); i++) + if (ops == dsa_device_ops[i]) + return protocol_name[i]; + + return protocol_name[DSA_TAG_PROTO_NONE]; +}; + const struct dsa_device_ops *dsa_resolve_tag_protocol(int tag_protocol) { const struct dsa_device_ops *ops; |