1 /* SPDX-License-Identifier: LGPL-2.1-or-later */
3 #include "alloc-util.h"
4 #include "netif-naming-scheme.h"
5 #include "proc-cmdline.h"
6 #include "string-util.h"
7 #include "string-table.h"
9 #ifdef _DEFAULT_NET_NAMING_SCHEME_TEST
10 /* The primary purpose of this check is to verify that _DEFAULT_NET_NAMING_SCHEME_TEST
11 * is a valid identifier. If an invalid name is given during configuration, this will
12 * fail with a name error. */
13 assert_cc(_DEFAULT_NET_NAMING_SCHEME_TEST
>= 0);
16 static const NamingScheme naming_schemes
[] = {
17 { "v238", NAMING_V238
},
18 { "v239", NAMING_V239
},
19 { "v240", NAMING_V240
},
20 { "v241", NAMING_V241
},
21 { "v243", NAMING_V243
},
22 { "v245", NAMING_V245
},
23 { "v247", NAMING_V247
},
24 { "v249", NAMING_V249
},
25 { "v250", NAMING_V250
},
26 { "v251", NAMING_V251
},
27 { "v252", NAMING_V252
},
28 /* … add more schemes here, as the logic to name devices is updated … */
33 const NamingScheme
* naming_scheme_from_name(const char *name
) {
34 /* "latest" may either be defined explicitly by the extra map, in which case we will find it in
35 * the table like any other name. After iterating through the table, we check for "latest" again,
36 * which means that if not mapped explicitly, it maps to the last defined entry, whatever that is. */
38 for (size_t i
= 0; i
< ELEMENTSOF(naming_schemes
); i
++)
39 if (streq(naming_schemes
[i
].name
, name
))
40 return naming_schemes
+ i
;
42 if (streq(name
, "latest"))
43 return naming_schemes
+ ELEMENTSOF(naming_schemes
) - 1;
48 const NamingScheme
* naming_scheme(void) {
49 static const NamingScheme
*cache
= NULL
;
50 _cleanup_free_
char *buffer
= NULL
;
56 /* Acquire setting from the kernel command line */
57 (void) proc_cmdline_get_key("net.naming-scheme", 0, &buffer
);
59 /* Also acquire it from an env var */
60 e
= getenv("NET_NAMING_SCHEME");
63 /* If prefixed with ':' the kernel cmdline takes precedence */
66 k
= e
; /* Otherwise the env var takes precedence */
71 cache
= naming_scheme_from_name(k
);
73 log_info("Using interface naming scheme '%s'.", cache
->name
);
77 log_warning("Unknown interface naming scheme '%s' requested, ignoring.", k
);
80 cache
= naming_scheme_from_name(DEFAULT_NET_NAMING_SCHEME
);
82 log_info("Using default interface naming scheme '%s'.", cache
->name
);
87 static const char* const name_policy_table
[_NAMEPOLICY_MAX
] = {
88 [NAMEPOLICY_KERNEL
] = "kernel",
89 [NAMEPOLICY_KEEP
] = "keep",
90 [NAMEPOLICY_DATABASE
] = "database",
91 [NAMEPOLICY_ONBOARD
] = "onboard",
92 [NAMEPOLICY_SLOT
] = "slot",
93 [NAMEPOLICY_PATH
] = "path",
94 [NAMEPOLICY_MAC
] = "mac",
97 DEFINE_STRING_TABLE_LOOKUP(name_policy
, NamePolicy
);
99 static const char* const alternative_names_policy_table
[_NAMEPOLICY_MAX
] = {
100 [NAMEPOLICY_DATABASE
] = "database",
101 [NAMEPOLICY_ONBOARD
] = "onboard",
102 [NAMEPOLICY_SLOT
] = "slot",
103 [NAMEPOLICY_PATH
] = "path",
104 [NAMEPOLICY_MAC
] = "mac",
107 DEFINE_STRING_TABLE_LOOKUP(alternative_names_policy
, NamePolicy
);