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ebpf: Added eBPF initialization by fds.

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It allows using file descriptors of eBPF provided
outside of QEMU.
QEMU may be run without capabilities for eBPF and run
RSS program provided by management tool(g.e. libvirt).

Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
Andrew Melnychenko 2024-02-05 18:54:32 +02:00 • committed by Jason Wang
parent 333b3e5fab
commit 0524ea0510
3 changed files with 38 additions and 0 deletions
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27
ebpf/ebpf_rss.c
View file

@ -146,6 +146,33 @@ error:
return false;
}
bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd,
int config_fd, int toeplitz_fd, int table_fd)
{
if (ebpf_rss_is_loaded(ctx)) {
return false;
}
if (program_fd < 0 || config_fd < 0 || toeplitz_fd < 0 || table_fd < 0) {
return false;
}
ctx->program_fd = program_fd;
ctx->map_configuration = config_fd;
ctx->map_toeplitz_key = toeplitz_fd;
ctx->map_indirections_table = table_fd;
if (!ebpf_rss_mmap(ctx)) {
ctx->program_fd = -1;
ctx->map_configuration = -1;
ctx->map_toeplitz_key = -1;
ctx->map_indirections_table = -1;
return false;
}
return true;
}
static bool ebpf_rss_set_config(struct EBPFRSSContext *ctx,
struct EBPFRSSConfig *config)
{