| Message ID | 20230831065140.496485-3-andrew@daynix.com |
|---|---|
| State | New |
| Headers | show |
| Series | eBPF RSS through QMP support. | expand |
On 2023/08/31 15:51, Andrew Melnychenko wrote: > 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 e71e229190..8d7fae2ad9 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 247f5eee1b..24bc6cc409 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)) { You can omit ctx == NULL here too.
diff --git a/ebpf/ebpf_rss-stub.c b/ebpf/ebpf_rss-stub.c index e71e229190..8d7fae2ad9 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 247f5eee1b..24bc6cc409 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 ab08a7266d..239242b0d2 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);
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(+)