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>
---
ebpf/ebpf_rss-stub.c | 6 ++++++
ebpf/ebpf_rss.c | 27 +++++++++++++++++++++++++++
ebpf/ebpf_rss.h | 5 +++++
3 files changed, 38 insertions(+)
diff --git a/ebpf/ebpf_rss-stub.c b/ebpf/ebpf_rss-stub.c
index e71e229190d..8d7fae2ad92 100644
--- a/ebpf/ebpf_rss-stub.c
+++ b/ebpf/ebpf_rss-stub.c
@@ -28,6 +28,12 @@ bool ebpf_rss_load(struct EBPFRSSContext *ctx)
return false;
}
+bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd,
+ int config_fd, int toeplitz_fd, int table_fd)
+{
+ return false;
+}
+
bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
uint16_t *indirections_table, uint8_t *toeplitz_key)
{
diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c
index 247f5eee1b6..24bc6cc409e 100644
--- a/ebpf/ebpf_rss.c
+++ b/ebpf/ebpf_rss.c
@@ -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 (ctx == NULL || 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)
{
diff --git a/ebpf/ebpf_rss.h b/ebpf/ebpf_rss.h
index ab08a7266d0..239242b0d26 100644
--- a/ebpf/ebpf_rss.h
+++ b/ebpf/ebpf_rss.h
@@ -14,6 +14,8 @@
#ifndef QEMU_EBPF_RSS_H
#define QEMU_EBPF_RSS_H
+#define EBPF_RSS_MAX_FDS 4
+
struct EBPFRSSContext {
void *obj;
int program_fd;
@@ -41,6 +43,9 @@ bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx);
bool ebpf_rss_load(struct EBPFRSSContext *ctx);
+bool ebpf_rss_load_fds(struct EBPFRSSContext *ctx, int program_fd,
+ int config_fd, int toeplitz_fd, int table_fd);
+
bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
uint16_t *indirections_table, uint8_t *toeplitz_key);
--
2.39.1