diff options
| author |   Nathan Skrzypczak <nathan.skrzypczak@gmail.com> | 2021-12-15 19:15:32 +0100 |
|---|---|---|
| committer |   Damjan Marion <dmarion@0xa5.net> | 2023-03-06 13:54:06 +0000 |
| commit | 8b213ee652dd69d941865fa59e1f780843016475 (patch) | |
| tree | f37774b199588dcace4b1c4277b8398fc3cc0498 /src/plugins/memif/memif.c | |
| parent | ec5c40b83acae400a8cc1a18ad897b6365774559 (diff) | |
memif: autogenerate socket_ids
This patch adds an API memif_socket_filename_add_del_v2
that allows autogenerating memif socket_id when passing
~0 in the socket_id field.
It opportunistically walks the hash to find a free ID
to use, and returns it in the reply.
socket_filename also becomes a variable length string,
to accomodate for longer names (in case a netns gets
passed)
Type: feature
Change-Id: I33fc3e1cf553af27579d6bad8691b22b530531cc
Signed-off-by: Nathan Skrzypczak <nathan.skrzypczak@gmail.com>
Diffstat (limited to 'src/plugins/memif/memif.c')
| -rw-r--r-- | src/plugins/memif/memif.c | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/plugins/memif/memif.c b/src/plugins/memif/memif.c index eee38f09a5b..c9d2f008cca 100644 --- a/src/plugins/memif/memif.c +++ b/src/plugins/memif/memif.c @@ -681,6 +681,36 @@ VLIB_REGISTER_NODE (memif_process_node,static) = { .name = "memif-process", }; +/* + * Returns an unused socket id, and ~0 if it can't find one. + */ +u32 +memif_get_unused_socket_id () +{ + memif_main_t *mm = &memif_main; + uword *p; + int i, j; + + static u32 seed = 0; + /* limit to 1M tries */ + for (j = 0; j < 1 << 10; j++) + { + seed = random_u32 (&seed); + for (i = 0; i < 1 << 10; i++) + { + /* look around randomly generated id */ + seed += (2 * (i % 2) - 1) * i; + if (seed == (u32) ~0) + continue; + p = hash_get (mm->socket_file_index_by_sock_id, seed); + if (!p) + return seed; + } + } + + return ~0; +} + clib_error_t * memif_socket_filename_add_del (u8 is_add, u32 sock_id, char *sock_filename) { |