[Qemu-devel] [PULL 0/2] Net patches
[PULL 0/7] Net patches
1
The following changes since commit 199e19ee538eb61fd08b1c1ee5aa838ebdcc968e:
1
The following changes since commit 92f8c6fef13b31ba222c4d20ad8afd2b79c4c28e:
2
2
3
Merge remote-tracking branch 'remotes/mjt/tags/trivial-patches-fetch' into staging (2017-06-05 15:28:12 +0100)
3
Merge remote-tracking branch 'remotes/pmaydell/tags/pull-target-arm-20210525' into staging (2021-05-25 16:17:06 +0100)
4
4
5
are available in the git repository at:
5
are available in the git repository at:
6
6
7
https://github.com/jasowang/qemu.git tags/net-pull-request
7
https://github.com/jasowang/qemu.git tags/net-pull-request
8
8
9
for you to fetch changes up to 6701e5514beab7b781a10424a94e9850c707287c:
9
for you to fetch changes up to 90322e646e87c1440661cb3ddbc0cc94309d8a4f:
10
10
11
Revert "Change net/socket.c to use socket_*() functions" again (2017-06-07 10:58:31 +0800)
11
MAINTAINERS: Added eBPF maintainers information. (2021-06-04 15:25:46 +0800)
12
12
13
----------------------------------------------------------------
13
----------------------------------------------------------------
14
14
15
----------------------------------------------------------------
15
----------------------------------------------------------------
16
Daniel P. Berrange (1):
16
Andrew Melnychenko (7):
17
Revert "Change net/socket.c to use socket_*() functions" again
17
net/tap: Added TUNSETSTEERINGEBPF code.
18
net: Added SetSteeringEBPF method for NetClientState.
19
ebpf: Added eBPF RSS program.
20
ebpf: Added eBPF RSS loader.
21
virtio-net: Added eBPF RSS to virtio-net.
22
docs: Added eBPF documentation.
23
MAINTAINERS: Added eBPF maintainers information.
18
24
19
Mao Zhongyi (1):
25
MAINTAINERS | 8 +
20
net/rocker: Cleanup the useless return value check
26
configure | 8 +-
21
27
docs/devel/ebpf_rss.rst | 125 +++++++++
22
hw/net/rocker/rocker.c | 9 ++--
28
docs/devel/index.rst | 1 +
23
hw/net/rocker/rocker_desc.c | 4 +-
29
ebpf/ebpf_rss-stub.c | 40 +++
24
net/socket.c | 127 +++++++++++++++++++-------------------------
30
ebpf/ebpf_rss.c | 165 ++++++++++++
25
3 files changed, 60 insertions(+), 80 deletions(-)
31
ebpf/ebpf_rss.h | 44 ++++
32
ebpf/meson.build | 1 +
33
ebpf/rss.bpf.skeleton.h | 431 +++++++++++++++++++++++++++++++
34
ebpf/trace-events | 4 +
35
ebpf/trace.h | 1 +
36
hw/net/vhost_net.c | 3 +
37
hw/net/virtio-net.c | 116 ++++++++-
38
include/hw/virtio/virtio-net.h | 4 +
39
include/net/net.h | 2 +
40
meson.build | 23 ++
41
meson_options.txt | 2 +
42
net/tap-bsd.c | 5 +
43
net/tap-linux.c | 13 +
44
net/tap-linux.h | 1 +
45
net/tap-solaris.c | 5 +
46
net/tap-stub.c | 5 +
47
net/tap.c | 9 +
48
net/tap_int.h | 1 +
49
net/vhost-vdpa.c | 2 +
50
tools/ebpf/Makefile.ebpf | 21 ++
51
tools/ebpf/rss.bpf.c | 571 +++++++++++++++++++++++++++++++++++++++++
52
27 files changed, 1607 insertions(+), 4 deletions(-)
53
create mode 100644 docs/devel/ebpf_rss.rst
54
create mode 100644 ebpf/ebpf_rss-stub.c
55
create mode 100644 ebpf/ebpf_rss.c
56
create mode 100644 ebpf/ebpf_rss.h
57
create mode 100644 ebpf/meson.build
58
create mode 100644 ebpf/rss.bpf.skeleton.h
59
create mode 100644 ebpf/trace-events
60
create mode 100644 ebpf/trace.h
61
create mode 100755 tools/ebpf/Makefile.ebpf
62
create mode 100644 tools/ebpf/rss.bpf.c
26
63
27
64
diff view generated by jsdifflib
New patch
[PULL 1/7] net/tap: Added TUNSETSTEERINGEBPF code.
1
From: Andrew Melnychenko <andrew@daynix.com>
1
2
3
Additional code that will be used for eBPF setting steering routine.
4
5
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
6
Signed-off-by: Jason Wang <jasowang@redhat.com>
7
---
8
net/tap-linux.h | 1 +
9
1 file changed, 1 insertion(+)
10
11
diff --git a/net/tap-linux.h b/net/tap-linux.h
12
index XXXXXXX..XXXXXXX 100644
13
--- a/net/tap-linux.h
14
+++ b/net/tap-linux.h
15
@@ -XXX,XX +XXX,XX @@
16
#define TUNSETQUEUE _IOW('T', 217, int)
17
#define TUNSETVNETLE _IOW('T', 220, int)
18
#define TUNSETVNETBE _IOW('T', 222, int)
19
+#define TUNSETSTEERINGEBPF _IOR('T', 224, int)
20
21
#endif
22
23
--
24
2.7.4
25
26
diff view generated by jsdifflib
New patch
[PULL 2/7] net: Added SetSteeringEBPF method for NetClientState.
1
From: Andrew Melnychenko <andrew@daynix.com>
1
2
3
For now, that method supported only by Linux TAP.
4
Linux TAP uses TUNSETSTEERINGEBPF ioctl.
5
6
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
7
Signed-off-by: Jason Wang <jasowang@redhat.com>
8
---
9
include/net/net.h | 2 ++
10
net/tap-bsd.c | 5 +++++
11
net/tap-linux.c | 13 +++++++++++++
12
net/tap-solaris.c | 5 +++++
13
net/tap-stub.c | 5 +++++
14
net/tap.c | 9 +++++++++
15
net/tap_int.h | 1 +
16
7 files changed, 40 insertions(+)
17
18
diff --git a/include/net/net.h b/include/net/net.h
19
index XXXXXXX..XXXXXXX 100644
20
--- a/include/net/net.h
21
+++ b/include/net/net.h
22
@@ -XXX,XX +XXX,XX @@ typedef int (SetVnetBE)(NetClientState *, bool);
23
typedef struct SocketReadState SocketReadState;
24
typedef void (SocketReadStateFinalize)(SocketReadState *rs);
25
typedef void (NetAnnounce)(NetClientState *);
26
+typedef bool (SetSteeringEBPF)(NetClientState *, int);
27
28
typedef struct NetClientInfo {
29
NetClientDriver type;
30
@@ -XXX,XX +XXX,XX @@ typedef struct NetClientInfo {
31
SetVnetLE *set_vnet_le;
32
SetVnetBE *set_vnet_be;
33
NetAnnounce *announce;
34
+ SetSteeringEBPF *set_steering_ebpf;
35
} NetClientInfo;
36
37
struct NetClientState {
38
diff --git a/net/tap-bsd.c b/net/tap-bsd.c
39
index XXXXXXX..XXXXXXX 100644
40
--- a/net/tap-bsd.c
41
+++ b/net/tap-bsd.c
42
@@ -XXX,XX +XXX,XX @@ int tap_fd_get_ifname(int fd, char *ifname)
43
{
44
return -1;
45
}
46
+
47
+int tap_fd_set_steering_ebpf(int fd, int prog_fd)
48
+{
49
+ return -1;
50
+}
51
diff --git a/net/tap-linux.c b/net/tap-linux.c
52
index XXXXXXX..XXXXXXX 100644
53
--- a/net/tap-linux.c
54
+++ b/net/tap-linux.c
55
@@ -XXX,XX +XXX,XX @@ int tap_fd_get_ifname(int fd, char *ifname)
56
pstrcpy(ifname, sizeof(ifr.ifr_name), ifr.ifr_name);
57
return 0;
58
}
59
+
60
+int tap_fd_set_steering_ebpf(int fd, int prog_fd)
61
+{
62
+ if (ioctl(fd, TUNSETSTEERINGEBPF, (void *) &prog_fd) != 0) {
63
+ error_report("Issue while setting TUNSETSTEERINGEBPF:"
64
+ " %s with fd: %d, prog_fd: %d",
65
+ strerror(errno), fd, prog_fd);
66
+
67
+ return -1;
68
+ }
69
+
70
+ return 0;
71
+}
72
diff --git a/net/tap-solaris.c b/net/tap-solaris.c
73
index XXXXXXX..XXXXXXX 100644
74
--- a/net/tap-solaris.c
75
+++ b/net/tap-solaris.c
76
@@ -XXX,XX +XXX,XX @@ int tap_fd_get_ifname(int fd, char *ifname)
77
{
78
return -1;
79
}
80
+
81
+int tap_fd_set_steering_ebpf(int fd, int prog_fd)
82
+{
83
+ return -1;
84
+}
85
diff --git a/net/tap-stub.c b/net/tap-stub.c
86
index XXXXXXX..XXXXXXX 100644
87
--- a/net/tap-stub.c
88
+++ b/net/tap-stub.c
89
@@ -XXX,XX +XXX,XX @@ int tap_fd_get_ifname(int fd, char *ifname)
90
{
91
return -1;
92
}
93
+
94
+int tap_fd_set_steering_ebpf(int fd, int prog_fd)
95
+{
96
+ return -1;
97
+}
98
diff --git a/net/tap.c b/net/tap.c
99
index XXXXXXX..XXXXXXX 100644
100
--- a/net/tap.c
101
+++ b/net/tap.c
102
@@ -XXX,XX +XXX,XX @@ static void tap_poll(NetClientState *nc, bool enable)
103
tap_write_poll(s, enable);
104
}
105
106
+static bool tap_set_steering_ebpf(NetClientState *nc, int prog_fd)
107
+{
108
+ TAPState *s = DO_UPCAST(TAPState, nc, nc);
109
+ assert(nc->info->type == NET_CLIENT_DRIVER_TAP);
110
+
111
+ return tap_fd_set_steering_ebpf(s->fd, prog_fd) == 0;
112
+}
113
+
114
int tap_get_fd(NetClientState *nc)
115
{
116
TAPState *s = DO_UPCAST(TAPState, nc, nc);
117
@@ -XXX,XX +XXX,XX @@ static NetClientInfo net_tap_info = {
118
.set_vnet_hdr_len = tap_set_vnet_hdr_len,
119
.set_vnet_le = tap_set_vnet_le,
120
.set_vnet_be = tap_set_vnet_be,
121
+ .set_steering_ebpf = tap_set_steering_ebpf,
122
};
123
124
static TAPState *net_tap_fd_init(NetClientState *peer,
125
diff --git a/net/tap_int.h b/net/tap_int.h
126
index XXXXXXX..XXXXXXX 100644
127
--- a/net/tap_int.h
128
+++ b/net/tap_int.h
129
@@ -XXX,XX +XXX,XX @@ int tap_fd_set_vnet_be(int fd, int vnet_is_be);
130
int tap_fd_enable(int fd);
131
int tap_fd_disable(int fd);
132
int tap_fd_get_ifname(int fd, char *ifname);
133
+int tap_fd_set_steering_ebpf(int fd, int prog_fd);
134
135
#endif /* NET_TAP_INT_H */
136
--
137
2.7.4
138
139
diff view generated by jsdifflib
New patch
[PULL 3/7] ebpf: Added eBPF RSS program.
1
From: Andrew Melnychenko <andrew@daynix.com>
1
2
3
RSS program and Makefile to build it.
4
The bpftool used to generate '.h' file.
5
The data in that file may be loaded by libbpf.
6
EBPF compilation is not required for building qemu.
7
You can use Makefile if you need to regenerate rss.bpf.skeleton.h.
8
9
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
10
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
11
Signed-off-by: Jason Wang <jasowang@redhat.com>
12
---
13
tools/ebpf/Makefile.ebpf | 21 ++
14
tools/ebpf/rss.bpf.c | 571 +++++++++++++++++++++++++++++++++++++++++++++++
15
2 files changed, 592 insertions(+)
16
create mode 100755 tools/ebpf/Makefile.ebpf
17
create mode 100644 tools/ebpf/rss.bpf.c
18
19
diff --git a/tools/ebpf/Makefile.ebpf b/tools/ebpf/Makefile.ebpf
20
new file mode 100755
21
index XXXXXXX..XXXXXXX
22
--- /dev/null
23
+++ b/tools/ebpf/Makefile.ebpf
24
@@ -XXX,XX +XXX,XX @@
25
+OBJS = rss.bpf.o
26
+
27
+LLC ?= llc
28
+CLANG ?= clang
29
+INC_FLAGS = `$(CLANG) -print-file-name=include`
30
+EXTRA_CFLAGS ?= -O2 -emit-llvm -fno-stack-protector
31
+
32
+all: $(OBJS)
33
+
34
+.PHONY: clean
35
+
36
+clean:
37
+    rm -f $(OBJS)
38
+
39
+$(OBJS): %.o:%.c
40
+    $(CLANG) $(INC_FLAGS) \
41
+ -D__KERNEL__ -D__ASM_SYSREG_H \
42
+ -I../include $(LINUXINCLUDE) \
43
+ $(EXTRA_CFLAGS) -c $< -o -| $(LLC) -march=bpf -filetype=obj -o $@
44
+    bpftool gen skeleton rss.bpf.o > rss.bpf.skeleton.h
45
+    cp rss.bpf.skeleton.h ../../ebpf/
46
diff --git a/tools/ebpf/rss.bpf.c b/tools/ebpf/rss.bpf.c
47
new file mode 100644
48
index XXXXXXX..XXXXXXX
49
--- /dev/null
50
+++ b/tools/ebpf/rss.bpf.c
51
@@ -XXX,XX +XXX,XX @@
52
+/*
53
+ * eBPF RSS program
54
+ *
55
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
56
+ *
57
+ * Authors:
58
+ * Andrew Melnychenko <andrew@daynix.com>
59
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
60
+ *
61
+ * This work is licensed under the terms of the GNU GPL, version 2. See
62
+ * the COPYING file in the top-level directory.
63
+ *
64
+ * Prepare:
65
+ * Requires llvm, clang, bpftool, linux kernel tree
66
+ *
67
+ * Build rss.bpf.skeleton.h:
68
+ * make -f Makefile.ebpf clean all
69
+ */
70
+
71
+#include <stddef.h>
72
+#include <stdbool.h>
73
+#include <linux/bpf.h>
74
+
75
+#include <linux/in.h>
76
+#include <linux/if_ether.h>
77
+#include <linux/ip.h>
78
+#include <linux/ipv6.h>
79
+
80
+#include <linux/udp.h>
81
+#include <linux/tcp.h>
82
+
83
+#include <bpf/bpf_helpers.h>
84
+#include <bpf/bpf_endian.h>
85
+#include <linux/virtio_net.h>
86
+
87
+#define INDIRECTION_TABLE_SIZE 128
88
+#define HASH_CALCULATION_BUFFER_SIZE 36
89
+
90
+struct rss_config_t {
91
+ __u8 redirect;
92
+ __u8 populate_hash;
93
+ __u32 hash_types;
94
+ __u16 indirections_len;
95
+ __u16 default_queue;
96
+} __attribute__((packed));
97
+
98
+struct toeplitz_key_data_t {
99
+ __u32 leftmost_32_bits;
100
+ __u8 next_byte[HASH_CALCULATION_BUFFER_SIZE];
101
+};
102
+
103
+struct packet_hash_info_t {
104
+ __u8 is_ipv4;
105
+ __u8 is_ipv6;
106
+ __u8 is_udp;
107
+ __u8 is_tcp;
108
+ __u8 is_ipv6_ext_src;
109
+ __u8 is_ipv6_ext_dst;
110
+ __u8 is_fragmented;
111
+
112
+ __u16 src_port;
113
+ __u16 dst_port;
114
+
115
+ union {
116
+ struct {
117
+ __be32 in_src;
118
+ __be32 in_dst;
119
+ };
120
+
121
+ struct {
122
+ struct in6_addr in6_src;
123
+ struct in6_addr in6_dst;
124
+ struct in6_addr in6_ext_src;
125
+ struct in6_addr in6_ext_dst;
126
+ };
127
+ };
128
+};
129
+
130
+struct bpf_map_def SEC("maps")
131
+tap_rss_map_configurations = {
132
+ .type = BPF_MAP_TYPE_ARRAY,
133
+ .key_size = sizeof(__u32),
134
+ .value_size = sizeof(struct rss_config_t),
135
+ .max_entries = 1,
136
+};
137
+
138
+struct bpf_map_def SEC("maps")
139
+tap_rss_map_toeplitz_key = {
140
+ .type = BPF_MAP_TYPE_ARRAY,
141
+ .key_size = sizeof(__u32),
142
+ .value_size = sizeof(struct toeplitz_key_data_t),
143
+ .max_entries = 1,
144
+};
145
+
146
+struct bpf_map_def SEC("maps")
147
+tap_rss_map_indirection_table = {
148
+ .type = BPF_MAP_TYPE_ARRAY,
149
+ .key_size = sizeof(__u32),
150
+ .value_size = sizeof(__u16),
151
+ .max_entries = INDIRECTION_TABLE_SIZE,
152
+};
153
+
154
+static inline void net_rx_rss_add_chunk(__u8 *rss_input, size_t *bytes_written,
155
+ const void *ptr, size_t size) {
156
+ __builtin_memcpy(&rss_input[*bytes_written], ptr, size);
157
+ *bytes_written += size;
158
+}
159
+
160
+static inline
161
+void net_toeplitz_add(__u32 *result,
162
+ __u8 *input,
163
+ __u32 len
164
+ , struct toeplitz_key_data_t *key) {
165
+
166
+ __u32 accumulator = *result;
167
+ __u32 leftmost_32_bits = key->leftmost_32_bits;
168
+ __u32 byte;
169
+
170
+ for (byte = 0; byte < HASH_CALCULATION_BUFFER_SIZE; byte++) {
171
+ __u8 input_byte = input[byte];
172
+ __u8 key_byte = key->next_byte[byte];
173
+ __u8 bit;
174
+
175
+ for (bit = 0; bit < 8; bit++) {
176
+ if (input_byte & (1 << 7)) {
177
+ accumulator ^= leftmost_32_bits;
178
+ }
179
+
180
+ leftmost_32_bits =
181
+ (leftmost_32_bits << 1) | ((key_byte & (1 << 7)) >> 7);
182
+
183
+ input_byte <<= 1;
184
+ key_byte <<= 1;
185
+ }
186
+ }
187
+
188
+ *result = accumulator;
189
+}
190
+
191
+
192
+static inline int ip6_extension_header_type(__u8 hdr_type)
193
+{
194
+ switch (hdr_type) {
195
+ case IPPROTO_HOPOPTS:
196
+ case IPPROTO_ROUTING:
197
+ case IPPROTO_FRAGMENT:
198
+ case IPPROTO_ICMPV6:
199
+ case IPPROTO_NONE:
200
+ case IPPROTO_DSTOPTS:
201
+ case IPPROTO_MH:
202
+ return 1;
203
+ default:
204
+ return 0;
205
+ }
206
+}
207
+/*
208
+ * According to
209
+ * https://www.iana.org/assignments/ipv6-parameters/ipv6-parameters.xhtml
210
+ * we expect that there are would be no more than 11 extensions in IPv6 header,
211
+ * also there is 27 TLV options for Destination and Hop-by-hop extensions.
212
+ * Need to choose reasonable amount of maximum extensions/options we may
213
+ * check to find ext src/dst.
214
+ */
215
+#define IP6_EXTENSIONS_COUNT 11
216
+#define IP6_OPTIONS_COUNT 30
217
+
218
+static inline int parse_ipv6_ext(struct __sk_buff *skb,
219
+ struct packet_hash_info_t *info,
220
+ __u8 *l4_protocol, size_t *l4_offset)
221
+{
222
+ int err = 0;
223
+
224
+ if (!ip6_extension_header_type(*l4_protocol)) {
225
+ return 0;
226
+ }
227
+
228
+ struct ipv6_opt_hdr ext_hdr = {};
229
+
230
+ for (unsigned int i = 0; i < IP6_EXTENSIONS_COUNT; ++i) {
231
+
232
+ err = bpf_skb_load_bytes_relative(skb, *l4_offset, &ext_hdr,
233
+ sizeof(ext_hdr), BPF_HDR_START_NET);
234
+ if (err) {
235
+ goto error;
236
+ }
237
+
238
+ if (*l4_protocol == IPPROTO_ROUTING) {
239
+ struct ipv6_rt_hdr ext_rt = {};
240
+
241
+ err = bpf_skb_load_bytes_relative(skb, *l4_offset, &ext_rt,
242
+ sizeof(ext_rt), BPF_HDR_START_NET);
243
+ if (err) {
244
+ goto error;
245
+ }
246
+
247
+ if ((ext_rt.type == IPV6_SRCRT_TYPE_2) &&
248
+ (ext_rt.hdrlen == sizeof(struct in6_addr) / 8) &&
249
+ (ext_rt.segments_left == 1)) {
250
+
251
+ err = bpf_skb_load_bytes_relative(skb,
252
+ *l4_offset + offsetof(struct rt2_hdr, addr),
253
+ &info->in6_ext_dst, sizeof(info->in6_ext_dst),
254
+ BPF_HDR_START_NET);
255
+ if (err) {
256
+ goto error;
257
+ }
258
+
259
+ info->is_ipv6_ext_dst = 1;
260
+ }
261
+
262
+ } else if (*l4_protocol == IPPROTO_DSTOPTS) {
263
+ struct ipv6_opt_t {
264
+ __u8 type;
265
+ __u8 length;
266
+ } __attribute__((packed)) opt = {};
267
+
268
+ size_t opt_offset = sizeof(ext_hdr);
269
+
270
+ for (unsigned int j = 0; j < IP6_OPTIONS_COUNT; ++j) {
271
+ err = bpf_skb_load_bytes_relative(skb, *l4_offset + opt_offset,
272
+ &opt, sizeof(opt), BPF_HDR_START_NET);
273
+ if (err) {
274
+ goto error;
275
+ }
276
+
277
+ if (opt.type == IPV6_TLV_HAO) {
278
+ err = bpf_skb_load_bytes_relative(skb,
279
+ *l4_offset + opt_offset
280
+ + offsetof(struct ipv6_destopt_hao, addr),
281
+ &info->in6_ext_src, sizeof(info->in6_ext_src),
282
+ BPF_HDR_START_NET);
283
+ if (err) {
284
+ goto error;
285
+ }
286
+
287
+ info->is_ipv6_ext_src = 1;
288
+ break;
289
+ }
290
+
291
+ opt_offset += (opt.type == IPV6_TLV_PAD1) ?
292
+ 1 : opt.length + sizeof(opt);
293
+
294
+ if (opt_offset + 1 >= ext_hdr.hdrlen * 8) {
295
+ break;
296
+ }
297
+ }
298
+ } else if (*l4_protocol == IPPROTO_FRAGMENT) {
299
+ info->is_fragmented = true;
300
+ }
301
+
302
+ *l4_protocol = ext_hdr.nexthdr;
303
+ *l4_offset += (ext_hdr.hdrlen + 1) * 8;
304
+
305
+ if (!ip6_extension_header_type(ext_hdr.nexthdr)) {
306
+ return 0;
307
+ }
308
+ }
309
+
310
+ return 0;
311
+error:
312
+ return err;
313
+}
314
+
315
+static __be16 parse_eth_type(struct __sk_buff *skb)
316
+{
317
+ unsigned int offset = 12;
318
+ __be16 ret = 0;
319
+ int err = 0;
320
+
321
+ err = bpf_skb_load_bytes_relative(skb, offset, &ret, sizeof(ret),
322
+ BPF_HDR_START_MAC);
323
+ if (err) {
324
+ return 0;
325
+ }
326
+
327
+ switch (bpf_ntohs(ret)) {
328
+ case ETH_P_8021AD:
329
+ offset += 4;
330
+ case ETH_P_8021Q:
331
+ offset += 4;
332
+ err = bpf_skb_load_bytes_relative(skb, offset, &ret, sizeof(ret),
333
+ BPF_HDR_START_MAC);
334
+ default:
335
+ break;
336
+ }
337
+
338
+ if (err) {
339
+ return 0;
340
+ }
341
+
342
+ return ret;
343
+}
344
+
345
+static inline int parse_packet(struct __sk_buff *skb,
346
+ struct packet_hash_info_t *info)
347
+{
348
+ int err = 0;
349
+
350
+ if (!info || !skb) {
351
+ return -1;
352
+ }
353
+
354
+ size_t l4_offset = 0;
355
+ __u8 l4_protocol = 0;
356
+ __u16 l3_protocol = bpf_ntohs(parse_eth_type(skb));
357
+ if (l3_protocol == 0) {
358
+ err = -1;
359
+ goto error;
360
+ }
361
+
362
+ if (l3_protocol == ETH_P_IP) {
363
+ info->is_ipv4 = 1;
364
+
365
+ struct iphdr ip = {};
366
+ err = bpf_skb_load_bytes_relative(skb, 0, &ip, sizeof(ip),
367
+ BPF_HDR_START_NET);
368
+ if (err) {
369
+ goto error;
370
+ }
371
+
372
+ info->in_src = ip.saddr;
373
+ info->in_dst = ip.daddr;
374
+ info->is_fragmented = !!ip.frag_off;
375
+
376
+ l4_protocol = ip.protocol;
377
+ l4_offset = ip.ihl * 4;
378
+ } else if (l3_protocol == ETH_P_IPV6) {
379
+ info->is_ipv6 = 1;
380
+
381
+ struct ipv6hdr ip6 = {};
382
+ err = bpf_skb_load_bytes_relative(skb, 0, &ip6, sizeof(ip6),
383
+ BPF_HDR_START_NET);
384
+ if (err) {
385
+ goto error;
386
+ }
387
+
388
+ info->in6_src = ip6.saddr;
389
+ info->in6_dst = ip6.daddr;
390
+
391
+ l4_protocol = ip6.nexthdr;
392
+ l4_offset = sizeof(ip6);
393
+
394
+ err = parse_ipv6_ext(skb, info, &l4_protocol, &l4_offset);
395
+ if (err) {
396
+ goto error;
397
+ }
398
+ }
399
+
400
+ if (l4_protocol != 0 && !info->is_fragmented) {
401
+ if (l4_protocol == IPPROTO_TCP) {
402
+ info->is_tcp = 1;
403
+
404
+ struct tcphdr tcp = {};
405
+ err = bpf_skb_load_bytes_relative(skb, l4_offset, &tcp, sizeof(tcp),
406
+ BPF_HDR_START_NET);
407
+ if (err) {
408
+ goto error;
409
+ }
410
+
411
+ info->src_port = tcp.source;
412
+ info->dst_port = tcp.dest;
413
+ } else if (l4_protocol == IPPROTO_UDP) { /* TODO: add udplite? */
414
+ info->is_udp = 1;
415
+
416
+ struct udphdr udp = {};
417
+ err = bpf_skb_load_bytes_relative(skb, l4_offset, &udp, sizeof(udp),
418
+ BPF_HDR_START_NET);
419
+ if (err) {
420
+ goto error;
421
+ }
422
+
423
+ info->src_port = udp.source;
424
+ info->dst_port = udp.dest;
425
+ }
426
+ }
427
+
428
+ return 0;
429
+
430
+error:
431
+ return err;
432
+}
433
+
434
+static inline __u32 calculate_rss_hash(struct __sk_buff *skb,
435
+ struct rss_config_t *config, struct toeplitz_key_data_t *toe)
436
+{
437
+ __u8 rss_input[HASH_CALCULATION_BUFFER_SIZE] = {};
438
+ size_t bytes_written = 0;
439
+ __u32 result = 0;
440
+ int err = 0;
441
+ struct packet_hash_info_t packet_info = {};
442
+
443
+ err = parse_packet(skb, &packet_info);
444
+ if (err) {
445
+ return 0;
446
+ }
447
+
448
+ if (packet_info.is_ipv4) {
449
+ if (packet_info.is_tcp &&
450
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_TCPv4) {
451
+
452
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
453
+ &packet_info.in_src,
454
+ sizeof(packet_info.in_src));
455
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
456
+ &packet_info.in_dst,
457
+ sizeof(packet_info.in_dst));
458
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
459
+ &packet_info.src_port,
460
+ sizeof(packet_info.src_port));
461
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
462
+ &packet_info.dst_port,
463
+ sizeof(packet_info.dst_port));
464
+ } else if (packet_info.is_udp &&
465
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_UDPv4) {
466
+
467
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
468
+ &packet_info.in_src,
469
+ sizeof(packet_info.in_src));
470
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
471
+ &packet_info.in_dst,
472
+ sizeof(packet_info.in_dst));
473
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
474
+ &packet_info.src_port,
475
+ sizeof(packet_info.src_port));
476
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
477
+ &packet_info.dst_port,
478
+ sizeof(packet_info.dst_port));
479
+ } else if (config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_IPv4) {
480
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
481
+ &packet_info.in_src,
482
+ sizeof(packet_info.in_src));
483
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
484
+ &packet_info.in_dst,
485
+ sizeof(packet_info.in_dst));
486
+ }
487
+ } else if (packet_info.is_ipv6) {
488
+ if (packet_info.is_tcp &&
489
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_TCPv6) {
490
+
491
+ if (packet_info.is_ipv6_ext_src &&
492
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_TCP_EX) {
493
+
494
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
495
+ &packet_info.in6_ext_src,
496
+ sizeof(packet_info.in6_ext_src));
497
+ } else {
498
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
499
+ &packet_info.in6_src,
500
+ sizeof(packet_info.in6_src));
501
+ }
502
+ if (packet_info.is_ipv6_ext_dst &&
503
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_TCP_EX) {
504
+
505
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
506
+ &packet_info.in6_ext_dst,
507
+ sizeof(packet_info.in6_ext_dst));
508
+ } else {
509
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
510
+ &packet_info.in6_dst,
511
+ sizeof(packet_info.in6_dst));
512
+ }
513
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
514
+ &packet_info.src_port,
515
+ sizeof(packet_info.src_port));
516
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
517
+ &packet_info.dst_port,
518
+ sizeof(packet_info.dst_port));
519
+ } else if (packet_info.is_udp &&
520
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_UDPv6) {
521
+
522
+ if (packet_info.is_ipv6_ext_src &&
523
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_UDP_EX) {
524
+
525
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
526
+ &packet_info.in6_ext_src,
527
+ sizeof(packet_info.in6_ext_src));
528
+ } else {
529
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
530
+ &packet_info.in6_src,
531
+ sizeof(packet_info.in6_src));
532
+ }
533
+ if (packet_info.is_ipv6_ext_dst &&
534
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_UDP_EX) {
535
+
536
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
537
+ &packet_info.in6_ext_dst,
538
+ sizeof(packet_info.in6_ext_dst));
539
+ } else {
540
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
541
+ &packet_info.in6_dst,
542
+ sizeof(packet_info.in6_dst));
543
+ }
544
+
545
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
546
+ &packet_info.src_port,
547
+ sizeof(packet_info.src_port));
548
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
549
+ &packet_info.dst_port,
550
+ sizeof(packet_info.dst_port));
551
+
552
+ } else if (config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_IPv6) {
553
+ if (packet_info.is_ipv6_ext_src &&
554
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_IP_EX) {
555
+
556
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
557
+ &packet_info.in6_ext_src,
558
+ sizeof(packet_info.in6_ext_src));
559
+ } else {
560
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
561
+ &packet_info.in6_src,
562
+ sizeof(packet_info.in6_src));
563
+ }
564
+ if (packet_info.is_ipv6_ext_dst &&
565
+ config->hash_types & VIRTIO_NET_RSS_HASH_TYPE_IP_EX) {
566
+
567
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
568
+ &packet_info.in6_ext_dst,
569
+ sizeof(packet_info.in6_ext_dst));
570
+ } else {
571
+ net_rx_rss_add_chunk(rss_input, &bytes_written,
572
+ &packet_info.in6_dst,
573
+ sizeof(packet_info.in6_dst));
574
+ }
575
+ }
576
+ }
577
+
578
+ if (bytes_written) {
579
+ net_toeplitz_add(&result, rss_input, bytes_written, toe);
580
+ }
581
+
582
+ return result;
583
+}
584
+
585
+SEC("tun_rss_steering")
586
+int tun_rss_steering_prog(struct __sk_buff *skb)
587
+{
588
+
589
+ struct rss_config_t *config;
590
+ struct toeplitz_key_data_t *toe;
591
+
592
+ __u32 key = 0;
593
+ __u32 hash = 0;
594
+
595
+ config = bpf_map_lookup_elem(&tap_rss_map_configurations, &key);
596
+ toe = bpf_map_lookup_elem(&tap_rss_map_toeplitz_key, &key);
597
+
598
+ if (config && toe) {
599
+ if (!config->redirect) {
600
+ return config->default_queue;
601
+ }
602
+
603
+ hash = calculate_rss_hash(skb, config, toe);
604
+ if (hash) {
605
+ __u32 table_idx = hash % config->indirections_len;
606
+ __u16 *queue = 0;
607
+
608
+ queue = bpf_map_lookup_elem(&tap_rss_map_indirection_table,
609
+ &table_idx);
610
+
611
+ if (queue) {
612
+ return *queue;
613
+ }
614
+ }
615
+
616
+ return config->default_queue;
617
+ }
618
+
619
+ return -1;
620
+}
621
+
622
+char _license[] SEC("license") = "GPL v2";
623
--
624
2.7.4
625
626
diff view generated by jsdifflib
New patch
[PULL 4/7] ebpf: Added eBPF RSS loader.
1
From: Andrew Melnychenko <andrew@daynix.com>
1
2
3
Added function that loads RSS eBPF program.
4
Added stub functions for RSS eBPF loader.
5
Added meson and configuration options.
6
7
By default, eBPF feature enabled if libbpf is present in the build system.
8
libbpf checked in configuration shell script and meson script.
9
10
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
11
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
12
Signed-off-by: Jason Wang <jasowang@redhat.com>
13
---
14
configure | 8 +-
15
ebpf/ebpf_rss-stub.c | 40 +++++
16
ebpf/ebpf_rss.c | 165 ++++++++++++++++++
17
ebpf/ebpf_rss.h | 44 +++++
18
ebpf/meson.build | 1 +
19
ebpf/rss.bpf.skeleton.h | 431 ++++++++++++++++++++++++++++++++++++++++++++++++
20
ebpf/trace-events | 4 +
21
ebpf/trace.h | 1 +
22
meson.build | 23 +++
23
meson_options.txt | 2 +
24
10 files changed, 718 insertions(+), 1 deletion(-)
25
create mode 100644 ebpf/ebpf_rss-stub.c
26
create mode 100644 ebpf/ebpf_rss.c
27
create mode 100644 ebpf/ebpf_rss.h
28
create mode 100644 ebpf/meson.build
29
create mode 100644 ebpf/rss.bpf.skeleton.h
30
create mode 100644 ebpf/trace-events
31
create mode 100644 ebpf/trace.h
32
33
diff --git a/configure b/configure
34
index XXXXXXX..XXXXXXX 100755
35
--- a/configure
36
+++ b/configure
37
@@ -XXX,XX +XXX,XX @@ vhost_vsock="$default_feature"
38
vhost_user="no"
39
vhost_user_blk_server="auto"
40
vhost_user_fs="$default_feature"
41
+bpf="auto"
42
kvm="auto"
43
hax="auto"
44
hvf="auto"
45
@@ -XXX,XX +XXX,XX @@ for opt do
46
;;
47
--enable-membarrier) membarrier="yes"
48
;;
49
+ --disable-bpf) bpf="disabled"
50
+ ;;
51
+ --enable-bpf) bpf="enabled"
52
+ ;;
53
--disable-blobs) blobs="false"
54
;;
55
--with-pkgversion=*) pkgversion="$optarg"
56
@@ -XXX,XX +XXX,XX @@ disabled with --disable-FEATURE, default is enabled if available
57
vhost-user vhost-user backend support
58
vhost-user-blk-server vhost-user-blk server support
59
vhost-vdpa vhost-vdpa kernel backend support
60
+ bpf BPF kernel support
61
spice spice
62
spice-protocol spice-protocol
63
rbd rados block device (rbd)
64
@@ -XXX,XX +XXX,XX @@ if test "$skip_meson" = no; then
65
-Dattr=$attr -Ddefault_devices=$default_devices \
66
-Ddocs=$docs -Dsphinx_build=$sphinx_build -Dinstall_blobs=$blobs \
67
-Dvhost_user_blk_server=$vhost_user_blk_server -Dmultiprocess=$multiprocess \
68
- -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek -Dguest_agent_msi=$guest_agent_msi \
69
+ -Dfuse=$fuse -Dfuse_lseek=$fuse_lseek -Dguest_agent_msi=$guest_agent_msi -Dbpf=$bpf\
70
$(if test "$default_features" = no; then echo "-Dauto_features=disabled"; fi) \
71
    -Dtcg_interpreter=$tcg_interpreter \
72
$cross_arg \
73
diff --git a/ebpf/ebpf_rss-stub.c b/ebpf/ebpf_rss-stub.c
74
new file mode 100644
75
index XXXXXXX..XXXXXXX
76
--- /dev/null
77
+++ b/ebpf/ebpf_rss-stub.c
78
@@ -XXX,XX +XXX,XX @@
79
+/*
80
+ * eBPF RSS stub file
81
+ *
82
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
83
+ *
84
+ * Authors:
85
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
86
+ *
87
+ * This work is licensed under the terms of the GNU GPL, version 2. See
88
+ * the COPYING file in the top-level directory.
89
+ */
90
+
91
+#include "qemu/osdep.h"
92
+#include "ebpf/ebpf_rss.h"
93
+
94
+void ebpf_rss_init(struct EBPFRSSContext *ctx)
95
+{
96
+
97
+}
98
+
99
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx)
100
+{
101
+ return false;
102
+}
103
+
104
+bool ebpf_rss_load(struct EBPFRSSContext *ctx)
105
+{
106
+ return false;
107
+}
108
+
109
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
110
+ uint16_t *indirections_table, uint8_t *toeplitz_key)
111
+{
112
+ return false;
113
+}
114
+
115
+void ebpf_rss_unload(struct EBPFRSSContext *ctx)
116
+{
117
+
118
+}
119
diff --git a/ebpf/ebpf_rss.c b/ebpf/ebpf_rss.c
120
new file mode 100644
121
index XXXXXXX..XXXXXXX
122
--- /dev/null
123
+++ b/ebpf/ebpf_rss.c
124
@@ -XXX,XX +XXX,XX @@
125
+/*
126
+ * eBPF RSS loader
127
+ *
128
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
129
+ *
130
+ * Authors:
131
+ * Andrew Melnychenko <andrew@daynix.com>
132
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
133
+ *
134
+ * This work is licensed under the terms of the GNU GPL, version 2. See
135
+ * the COPYING file in the top-level directory.
136
+ */
137
+
138
+#include "qemu/osdep.h"
139
+#include "qemu/error-report.h"
140
+
141
+#include <bpf/libbpf.h>
142
+#include <bpf/bpf.h>
143
+
144
+#include "hw/virtio/virtio-net.h" /* VIRTIO_NET_RSS_MAX_TABLE_LEN */
145
+
146
+#include "ebpf/ebpf_rss.h"
147
+#include "ebpf/rss.bpf.skeleton.h"
148
+#include "trace.h"
149
+
150
+void ebpf_rss_init(struct EBPFRSSContext *ctx)
151
+{
152
+ if (ctx != NULL) {
153
+ ctx->obj = NULL;
154
+ }
155
+}
156
+
157
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx)
158
+{
159
+ return ctx != NULL && ctx->obj != NULL;
160
+}
161
+
162
+bool ebpf_rss_load(struct EBPFRSSContext *ctx)
163
+{
164
+ struct rss_bpf *rss_bpf_ctx;
165
+
166
+ if (ctx == NULL) {
167
+ return false;
168
+ }
169
+
170
+ rss_bpf_ctx = rss_bpf__open();
171
+ if (rss_bpf_ctx == NULL) {
172
+ trace_ebpf_error("eBPF RSS", "can not open eBPF RSS object");
173
+ goto error;
174
+ }
175
+
176
+ bpf_program__set_socket_filter(rss_bpf_ctx->progs.tun_rss_steering_prog);
177
+
178
+ if (rss_bpf__load(rss_bpf_ctx)) {
179
+ trace_ebpf_error("eBPF RSS", "can not load RSS program");
180
+ goto error;
181
+ }
182
+
183
+ ctx->obj = rss_bpf_ctx;
184
+ ctx->program_fd = bpf_program__fd(
185
+ rss_bpf_ctx->progs.tun_rss_steering_prog);
186
+ ctx->map_configuration = bpf_map__fd(
187
+ rss_bpf_ctx->maps.tap_rss_map_configurations);
188
+ ctx->map_indirections_table = bpf_map__fd(
189
+ rss_bpf_ctx->maps.tap_rss_map_indirection_table);
190
+ ctx->map_toeplitz_key = bpf_map__fd(
191
+ rss_bpf_ctx->maps.tap_rss_map_toeplitz_key);
192
+
193
+ return true;
194
+error:
195
+ rss_bpf__destroy(rss_bpf_ctx);
196
+ ctx->obj = NULL;
197
+
198
+ return false;
199
+}
200
+
201
+static bool ebpf_rss_set_config(struct EBPFRSSContext *ctx,
202
+ struct EBPFRSSConfig *config)
203
+{
204
+ uint32_t map_key = 0;
205
+
206
+ if (!ebpf_rss_is_loaded(ctx)) {
207
+ return false;
208
+ }
209
+ if (bpf_map_update_elem(ctx->map_configuration,
210
+ &map_key, config, 0) < 0) {
211
+ return false;
212
+ }
213
+ return true;
214
+}
215
+
216
+static bool ebpf_rss_set_indirections_table(struct EBPFRSSContext *ctx,
217
+ uint16_t *indirections_table,
218
+ size_t len)
219
+{
220
+ uint32_t i = 0;
221
+
222
+ if (!ebpf_rss_is_loaded(ctx) || indirections_table == NULL ||
223
+ len > VIRTIO_NET_RSS_MAX_TABLE_LEN) {
224
+ return false;
225
+ }
226
+
227
+ for (; i < len; ++i) {
228
+ if (bpf_map_update_elem(ctx->map_indirections_table, &i,
229
+ indirections_table + i, 0) < 0) {
230
+ return false;
231
+ }
232
+ }
233
+ return true;
234
+}
235
+
236
+static bool ebpf_rss_set_toepliz_key(struct EBPFRSSContext *ctx,
237
+ uint8_t *toeplitz_key)
238
+{
239
+ uint32_t map_key = 0;
240
+
241
+ /* prepare toeplitz key */
242
+ uint8_t toe[VIRTIO_NET_RSS_MAX_KEY_SIZE] = {};
243
+
244
+ if (!ebpf_rss_is_loaded(ctx) || toeplitz_key == NULL) {
245
+ return false;
246
+ }
247
+ memcpy(toe, toeplitz_key, VIRTIO_NET_RSS_MAX_KEY_SIZE);
248
+ *(uint32_t *)toe = ntohl(*(uint32_t *)toe);
249
+
250
+ if (bpf_map_update_elem(ctx->map_toeplitz_key, &map_key, toe,
251
+ 0) < 0) {
252
+ return false;
253
+ }
254
+ return true;
255
+}
256
+
257
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
258
+ uint16_t *indirections_table, uint8_t *toeplitz_key)
259
+{
260
+ if (!ebpf_rss_is_loaded(ctx) || config == NULL ||
261
+ indirections_table == NULL || toeplitz_key == NULL) {
262
+ return false;
263
+ }
264
+
265
+ if (!ebpf_rss_set_config(ctx, config)) {
266
+ return false;
267
+ }
268
+
269
+ if (!ebpf_rss_set_indirections_table(ctx, indirections_table,
270
+ config->indirections_len)) {
271
+ return false;
272
+ }
273
+
274
+ if (!ebpf_rss_set_toepliz_key(ctx, toeplitz_key)) {
275
+ return false;
276
+ }
277
+
278
+ return true;
279
+}
280
+
281
+void ebpf_rss_unload(struct EBPFRSSContext *ctx)
282
+{
283
+ if (!ebpf_rss_is_loaded(ctx)) {
284
+ return;
285
+ }
286
+
287
+ rss_bpf__destroy(ctx->obj);
288
+ ctx->obj = NULL;
289
+}
290
diff --git a/ebpf/ebpf_rss.h b/ebpf/ebpf_rss.h
291
new file mode 100644
292
index XXXXXXX..XXXXXXX
293
--- /dev/null
294
+++ b/ebpf/ebpf_rss.h
295
@@ -XXX,XX +XXX,XX @@
296
+/*
297
+ * eBPF RSS header
298
+ *
299
+ * Developed by Daynix Computing LTD (http://www.daynix.com)
300
+ *
301
+ * Authors:
302
+ * Andrew Melnychenko <andrew@daynix.com>
303
+ * Yuri Benditovich <yuri.benditovich@daynix.com>
304
+ *
305
+ * This work is licensed under the terms of the GNU GPL, version 2. See
306
+ * the COPYING file in the top-level directory.
307
+ */
308
+
309
+#ifndef QEMU_EBPF_RSS_H
310
+#define QEMU_EBPF_RSS_H
311
+
312
+struct EBPFRSSContext {
313
+ void *obj;
314
+ int program_fd;
315
+ int map_configuration;
316
+ int map_toeplitz_key;
317
+ int map_indirections_table;
318
+};
319
+
320
+struct EBPFRSSConfig {
321
+ uint8_t redirect;
322
+ uint8_t populate_hash;
323
+ uint32_t hash_types;
324
+ uint16_t indirections_len;
325
+ uint16_t default_queue;
326
+} __attribute__((packed));
327
+
328
+void ebpf_rss_init(struct EBPFRSSContext *ctx);
329
+
330
+bool ebpf_rss_is_loaded(struct EBPFRSSContext *ctx);
331
+
332
+bool ebpf_rss_load(struct EBPFRSSContext *ctx);
333
+
334
+bool ebpf_rss_set_all(struct EBPFRSSContext *ctx, struct EBPFRSSConfig *config,
335
+ uint16_t *indirections_table, uint8_t *toeplitz_key);
336
+
337
+void ebpf_rss_unload(struct EBPFRSSContext *ctx);
338
+
339
+#endif /* QEMU_EBPF_RSS_H */
340
diff --git a/ebpf/meson.build b/ebpf/meson.build
341
new file mode 100644
342
index XXXXXXX..XXXXXXX
343
--- /dev/null
344
+++ b/ebpf/meson.build
345
@@ -0,0 +1 @@
346
+common_ss.add(when: libbpf, if_true: files('ebpf_rss.c'), if_false: files('ebpf_rss-stub.c'))
347
diff --git a/ebpf/rss.bpf.skeleton.h b/ebpf/rss.bpf.skeleton.h
348
new file mode 100644
349
index XXXXXXX..XXXXXXX
350
--- /dev/null
351
+++ b/ebpf/rss.bpf.skeleton.h
352
@@ -XXX,XX +XXX,XX @@
353
+/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
354
+
355
+/* THIS FILE IS AUTOGENERATED! */
356
+#ifndef __RSS_BPF_SKEL_H__
357
+#define __RSS_BPF_SKEL_H__
358
+
359
+#include <stdlib.h>
360
+#include <bpf/libbpf.h>
361
+
362
+struct rss_bpf {
363
+    struct bpf_object_skeleton *skeleton;
364
+    struct bpf_object *obj;
365
+    struct {
366
+        struct bpf_map *tap_rss_map_configurations;
367
+        struct bpf_map *tap_rss_map_indirection_table;
368
+        struct bpf_map *tap_rss_map_toeplitz_key;
369
+    } maps;
370
+    struct {
371
+        struct bpf_program *tun_rss_steering_prog;
372
+    } progs;
373
+    struct {
374
+        struct bpf_link *tun_rss_steering_prog;
375
+    } links;
376
+};
377
+
378
+static void
379
+rss_bpf__destroy(struct rss_bpf *obj)
380
+{
381
+    if (!obj)
382
+        return;
383
+    if (obj->skeleton)
384
+        bpf_object__destroy_skeleton(obj->skeleton);
385
+    free(obj);
386
+}
387
+
388
+static inline int
389
+rss_bpf__create_skeleton(struct rss_bpf *obj);
390
+
391
+static inline struct rss_bpf *
392
+rss_bpf__open_opts(const struct bpf_object_open_opts *opts)
393
+{
394
+    struct rss_bpf *obj;
395
+
396
+    obj = (struct rss_bpf *)calloc(1, sizeof(*obj));
397
+    if (!obj)
398
+        return NULL;
399
+    if (rss_bpf__create_skeleton(obj))
400
+        goto err;
401
+    if (bpf_object__open_skeleton(obj->skeleton, opts))
402
+        goto err;
403
+
404
+    return obj;
405
+err:
406
+    rss_bpf__destroy(obj);
407
+    return NULL;
408
+}
409
+
410
+static inline struct rss_bpf *
411
+rss_bpf__open(void)
412
+{
413
+    return rss_bpf__open_opts(NULL);
414
+}
415
+
416
+static inline int
417
+rss_bpf__load(struct rss_bpf *obj)
418
+{
419
+    return bpf_object__load_skeleton(obj->skeleton);
420
+}
421
+
422
+static inline struct rss_bpf *
423
+rss_bpf__open_and_load(void)
424
+{
425
+    struct rss_bpf *obj;
426
+
427
+    obj = rss_bpf__open();
428
+    if (!obj)
429
+        return NULL;
430
+    if (rss_bpf__load(obj)) {
431
+        rss_bpf__destroy(obj);
432
+        return NULL;
433
+    }
434
+    return obj;
435
+}
436
+
437
+static inline int
438
+rss_bpf__attach(struct rss_bpf *obj)
439
+{
440
+    return bpf_object__attach_skeleton(obj->skeleton);
441
+}
442
+
443
+static inline void
444
+rss_bpf__detach(struct rss_bpf *obj)
445
+{
446
+    return bpf_object__detach_skeleton(obj->skeleton);
447
+}
448
+
449
+static inline int
450
+rss_bpf__create_skeleton(struct rss_bpf *obj)
451
+{
452
+    struct bpf_object_skeleton *s;
453
+
454
+    s = (struct bpf_object_skeleton *)calloc(1, sizeof(*s));
455
+    if (!s)
456
+        return -1;
457
+    obj->skeleton = s;
458
+
459
+    s->sz = sizeof(*s);
460
+    s->name = "rss_bpf";
461
+    s->obj = &obj->obj;
462
+
463
+    /* maps */
464
+    s->map_cnt = 3;
465
+    s->map_skel_sz = sizeof(*s->maps);
466
+    s->maps = (struct bpf_map_skeleton *)calloc(s->map_cnt, s->map_skel_sz);
467
+    if (!s->maps)
468
+        goto err;
469
+
470
+    s->maps[0].name = "tap_rss_map_configurations";
471
+    s->maps[0].map = &obj->maps.tap_rss_map_configurations;
472
+
473
+    s->maps[1].name = "tap_rss_map_indirection_table";
474
+    s->maps[1].map = &obj->maps.tap_rss_map_indirection_table;
475
+
476
+    s->maps[2].name = "tap_rss_map_toeplitz_key";
477
+    s->maps[2].map = &obj->maps.tap_rss_map_toeplitz_key;
478
+
479
+    /* programs */
480
+    s->prog_cnt = 1;
481
+    s->prog_skel_sz = sizeof(*s->progs);
482
+    s->progs = (struct bpf_prog_skeleton *)calloc(s->prog_cnt, s->prog_skel_sz);
483
+    if (!s->progs)
484
+        goto err;
485
+
486
+    s->progs[0].name = "tun_rss_steering_prog";
487
+    s->progs[0].prog = &obj->progs.tun_rss_steering_prog;
488
+    s->progs[0].link = &obj->links.tun_rss_steering_prog;
489
+
490
+    s->data_sz = 8088;
491
+    s->data = (void *)"\
492
+\x7f\x45\x4c\x46\x02\x01\x01\0\0\0\0\0\0\0\0\0\x01\0\xf7\0\x01\0\0\0\0\0\0\0\0\
493
+\0\0\0\0\0\0\0\0\0\0\0\x18\x1d\0\0\0\0\0\0\0\0\0\0\x40\0\0\0\0\0\x40\0\x0a\0\
494
+\x01\0\xbf\x18\0\0\0\0\0\0\xb7\x01\0\0\0\0\0\0\x63\x1a\x4c\xff\0\0\0\0\xbf\xa7\
495
+\0\0\0\0\0\0\x07\x07\0\0\x4c\xff\xff\xff\x18\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\
496
+\xbf\x72\0\0\0\0\0\0\x85\0\0\0\x01\0\0\0\xbf\x06\0\0\0\0\0\0\x18\x01\0\0\0\0\0\
497
+\0\0\0\0\0\0\0\0\0\xbf\x72\0\0\0\0\0\0\x85\0\0\0\x01\0\0\0\xbf\x07\0\0\0\0\0\0\
498
+\x18\0\0\0\xff\xff\xff\xff\0\0\0\0\0\0\0\0\x15\x06\x66\x02\0\0\0\0\xbf\x79\0\0\
499
+\0\0\0\0\x15\x09\x64\x02\0\0\0\0\x71\x61\0\0\0\0\0\0\x55\x01\x01\0\0\0\0\0\x05\
500
+\0\x5d\x02\0\0\0\0\xb7\x01\0\0\0\0\0\0\x63\x1a\xc0\xff\0\0\0\0\x7b\x1a\xb8\xff\
501
+\0\0\0\0\x7b\x1a\xb0\xff\0\0\0\0\x7b\x1a\xa8\xff\0\0\0\0\x7b\x1a\xa0\xff\0\0\0\
502
+\0\x63\x1a\x98\xff\0\0\0\0\x7b\x1a\x90\xff\0\0\0\0\x7b\x1a\x88\xff\0\0\0\0\x7b\
503
+\x1a\x80\xff\0\0\0\0\x7b\x1a\x78\xff\0\0\0\0\x7b\x1a\x70\xff\0\0\0\0\x7b\x1a\
504
+\x68\xff\0\0\0\0\x7b\x1a\x60\xff\0\0\0\0\x7b\x1a\x58\xff\0\0\0\0\x7b\x1a\x50\
505
+\xff\0\0\0\0\x15\x08\x4c\x02\0\0\0\0\x6b\x1a\xd0\xff\0\0\0\0\xbf\xa3\0\0\0\0\0\
506
+\0\x07\x03\0\0\xd0\xff\xff\xff\xbf\x81\0\0\0\0\0\0\xb7\x02\0\0\x0c\0\0\0\xb7\
507
+\x04\0\0\x02\0\0\0\xb7\x05\0\0\0\0\0\0\x85\0\0\0\x44\0\0\0\x67\0\0\0\x20\0\0\0\
508
+\x77\0\0\0\x20\0\0\0\x55\0\x11\0\0\0\0\0\xb7\x02\0\0\x10\0\0\0\x69\xa1\xd0\xff\
509
+\0\0\0\0\xbf\x13\0\0\0\0\0\0\xdc\x03\0\0\x10\0\0\0\x15\x03\x02\0\0\x81\0\0\x55\
510
+\x03\x0c\0\xa8\x88\0\0\xb7\x02\0\0\x14\0\0\0\xbf\xa3\0\0\0\0\0\0\x07\x03\0\0\
511
+\xd0\xff\xff\xff\xbf\x81\0\0\0\0\0\0\xb7\x04\0\0\x02\0\0\0\xb7\x05\0\0\0\0\0\0\
512
+\x85\0\0\0\x44\0\0\0\x69\xa1\xd0\xff\0\0\0\0\x67\0\0\0\x20\0\0\0\x77\0\0\0\x20\
513
+\0\0\0\x15\0\x01\0\0\0\0\0\x05\0\x2f\x02\0\0\0\0\x15\x01\x2e\x02\0\0\0\0\x7b\
514
+\x9a\x30\xff\0\0\0\0\x15\x01\x57\0\x86\xdd\0\0\x55\x01\x3b\0\x08\0\0\0\x7b\x7a\
515
+\x20\xff\0\0\0\0\xb7\x07\0\0\x01\0\0\0\x73\x7a\x50\xff\0\0\0\0\xb7\x01\0\0\0\0\
516
+\0\0\x63\x1a\xe0\xff\0\0\0\0\x7b\x1a\xd8\xff\0\0\0\0\x7b\x1a\xd0\xff\0\0\0\0\
517
+\xbf\xa3\0\0\0\0\0\0\x07\x03\0\0\xd0\xff\xff\xff\xbf\x81\0\0\0\0\0\0\xb7\x02\0\
518
+\0\0\0\0\0\xb7\x04\0\0\x14\0\0\0\xb7\x05\0\0\x01\0\0\0\x85\0\0\0\x44\0\0\0\x67\
519
+\0\0\0\x20\0\0\0\x77\0\0\0\x20\0\0\0\x55\0\x1a\x02\0\0\0\0\x69\xa1\xd6\xff\0\0\
520
+\0\0\x55\x01\x01\0\0\0\0\0\xb7\x07\0\0\0\0\0\0\x61\xa1\xdc\xff\0\0\0\0\x63\x1a\
521
+\x5c\xff\0\0\0\0\x61\xa1\xe0\xff\0\0\0\0\x63\x1a\x60\xff\0\0\0\0\x73\x7a\x56\
522
+\xff\0\0\0\0\x71\xa9\xd9\xff\0\0\0\0\x71\xa1\xd0\xff\0\0\0\0\x67\x01\0\0\x02\0\
523
+\0\0\x57\x01\0\0\x3c\0\0\0\x7b\x1a\x40\xff\0\0\0\0\x79\xa7\x20\xff\0\0\0\0\xbf\
524
+\x91\0\0\0\0\0\0\x57\x01\0\0\xff\0\0\0\x15\x01\x19\0\0\0\0\0\x71\xa1\x56\xff\0\
525
+\0\0\0\x55\x01\x17\0\0\0\0\0\x57\x09\0\0\xff\0\0\0\x15\x09\x7a\x01\x11\0\0\0\
526
+\x55\x09\x14\0\x06\0\0\0\xb7\x01\0\0\x01\0\0\0\x73\x1a\x53\xff\0\0\0\0\xb7\x01\
527
+\0\0\0\0\0\0\x63\x1a\xe0\xff\0\0\0\0\x7b\x1a\xd8\xff\0\0\0\0\x7b\x1a\xd0\xff\0\
528
+\0\0\0\xbf\xa3\0\0\0\0\0\0\x07\x03\0\0\xd0\xff\xff\xff\xbf\x81\0\0\0\0\0\0\x79\
529
+\xa2\x40\xff\0\0\0\0\xb7\x04\0\0\x14\0\0\0\xb7\x05\0\0\x01\0\0\0\x85\0\0\0\x44\
530
+\0\0\0\x67\0\0\0\x20\0\0\0\x77\0\0\0\x20\0\0\0\x55\0\xf4\x01\0\0\0\0\x69\xa1\
531
+\xd0\xff\0\0\0\0\x6b\x1a\x58\xff\0\0\0\0\x69\xa1\xd2\xff\0\0\0\0\x6b\x1a\x5a\
532
+\xff\0\0\0\0\x71\xa1\x50\xff\0\0\0\0\x15\x01\xd4\0\0\0\0\0\x71\x62\x03\0\0\0\0\
533
+\0\x67\x02\0\0\x08\0\0\0\x71\x61\x02\0\0\0\0\0\x4f\x12\0\0\0\0\0\0\x71\x63\x04\
534
+\0\0\0\0\0\x71\x61\x05\0\0\0\0\0\x67\x01\0\0\x08\0\0\0\x4f\x31\0\0\0\0\0\0\x67\
535
+\x01\0\0\x10\0\0\0\x4f\x21\0\0\0\0\0\0\x71\xa2\x53\xff\0\0\0\0\x79\xa0\x30\xff\
536
+\0\0\0\0\x15\x02\x06\x01\0\0\0\0\xbf\x12\0\0\0\0\0\0\x57\x02\0\0\x02\0\0\0\x15\
537
+\x02\x03\x01\0\0\0\0\x61\xa1\x5c\xff\0\0\0\0\x63\x1a\xa0\xff\0\0\0\0\x61\xa1\
538
+\x60\xff\0\0\0\0\x63\x1a\xa4\xff\0\0\0\0\x69\xa1\x58\xff\0\0\0\0\x6b\x1a\xa8\
539
+\xff\0\0\0\0\x69\xa1\x5a\xff\0\0\0\0\x6b\x1a\xaa\xff\0\0\0\0\x05\0\x65\x01\0\0\
540
+\0\0\xb7\x01\0\0\x01\0\0\0\x73\x1a\x51\xff\0\0\0\0\xb7\x01\0\0\0\0\0\0\x7b\x1a\
541
+\xf0\xff\0\0\0\0\x7b\x1a\xe8\xff\0\0\0\0\x7b\x1a\xe0\xff\0\0\0\0\x7b\x1a\xd8\
542
+\xff\0\0\0\0\x7b\x1a\xd0\xff\0\0\0\0\xbf\xa3\0\0\0\0\0\0\x07\x03\0\0\xd0\xff\
543
+\xff\xff\xb7\x01\0\0\x28\0\0\0\x7b\x1a\x40\xff\0\0\0\0\xbf\x81\0\0\0\0\0\0\xb7\
544
+\x02\0\0\0\0\0\0\xb7\x04\0\0\x28\0\0\0\xb7\x05\0\0\x01\0\0\0\x85\0\0\0\x44\0\0\
545
+\0\x67\0\0\0\x20\0\0\0\x77\0\0\0\x20\0\0\0\x55\0\x10\x01\0\0\0\0\x79\xa1\xe0\
546
+\xff\0\0\0\0\x63\x1a\x64\xff\0\0\0\0\x77\x01\0\0\x20\0\0\0\x63\x1a\x68\xff\0\0\
547
+\0\0\x79\xa1\xd8\xff\0\0\0\0\x63\x1a\x5c\xff\0\0\0\0\x77\x01\0\0\x20\0\0\0\x63\
548
+\x1a\x60\xff\0\0\0\0\x79\xa1\xe8\xff\0\0\0\0\x63\x1a\x6c\xff\0\0\0\0\x77\x01\0\
549
+\0\x20\0\0\0\x63\x1a\x70\xff\0\0\0\0\x79\xa1\xf0\xff\0\0\0\0\x63\x1a\x74\xff\0\
550
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551
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552
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553
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554
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555
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556
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557
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558
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559
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560
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561
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562
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563
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564
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565
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566
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567
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568
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569
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570
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571
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572
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573
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574
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575
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576
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577
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578
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579
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580
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581
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582
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583
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584
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585
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586
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587
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588
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589
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590
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591
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592
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593
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594
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595
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596
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597
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598
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599
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600
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601
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602
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603
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604
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605
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606
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607
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608
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609
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610
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611
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612
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613
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614
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615
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616
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617
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618
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619
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620
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621
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622
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623
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624
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625
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626
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627
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628
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629
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630
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631
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632
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633
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634
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635
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636
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637
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638
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639
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640
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641
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642
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643
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644
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645
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646
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647
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648
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649
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650
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651
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652
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653
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654
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655
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656
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657
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658
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659
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660
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661
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750
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767
+\x14\0\0\0\0\0\0\x3c\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x04\0\0\0\0\0\0\0\0\0\0\0\0\
768
+\0\0\0\x6c\0\0\0\x01\0\0\0\x03\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x54\x14\0\0\0\0\0\
769
+\0\x07\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x01\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x78\0\0\
770
+\0\x01\0\0\0\x02\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x60\x14\0\0\0\0\0\0\x30\0\0\0\0\
771
+\0\0\0\0\0\0\0\0\0\0\0\x08\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x74\0\0\0\x09\0\0\0\0\
772
+\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\x90\x1a\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\x09\0\0\0\
773
+\x07\0\0\0\x08\0\0\0\0\0\0\0\x10\0\0\0\0\0\0\0\xb2\0\0\0\x02\0\0\0\0\0\0\0\0\0\
774
+\0\0\0\0\0\0\0\0\0\0\x90\x14\0\0\0\0\0\0\xd0\x05\0\0\0\0\0\0\x01\0\0\0\x39\0\0\
775
+\0\x08\0\0\0\0\0\0\0\x18\0\0\0\0\0\0\0";
776
+
777
+    return 0;
778
+err:
779
+    bpf_object__destroy_skeleton(s);
780
+    return -1;
781
+}
782
+
783
+#endif /* __RSS_BPF_SKEL_H__ */
784
diff --git a/ebpf/trace-events b/ebpf/trace-events
785
new file mode 100644
786
index XXXXXXX..XXXXXXX
787
--- /dev/null
788
+++ b/ebpf/trace-events
789
@@ -XXX,XX +XXX,XX @@
790
+# See docs/devel/tracing.txt for syntax documentation.
791
+
792
+# ebpf-rss.c
793
+ebpf_error(const char *s1, const char *s2) "error in %s: %s"
794
diff --git a/ebpf/trace.h b/ebpf/trace.h
795
new file mode 100644
796
index XXXXXXX..XXXXXXX
797
--- /dev/null
798
+++ b/ebpf/trace.h
799
@@ -0,0 +1 @@
800
+#include "trace/trace-ebpf.h"
801
diff --git a/meson.build b/meson.build
802
index XXXXXXX..XXXXXXX 100644
803
--- a/meson.build
804
+++ b/meson.build
805
@@ -XXX,XX +XXX,XX @@ if not get_option('fuse_lseek').disabled()
806
endif
807
endif
808
809
+# libbpf
810
+libbpf = dependency('libbpf', required: get_option('bpf'), method: 'pkg-config')
811
+if libbpf.found() and not cc.links('''
812
+ #include <bpf/libbpf.h>
813
+ int main(void)
814
+ {
815
+ bpf_object__destroy_skeleton(NULL);
816
+ return 0;
817
+ }''', dependencies: libbpf)
818
+ libbpf = not_found
819
+ if get_option('bpf').enabled()
820
+ error('libbpf skeleton test failed')
821
+ else
822
+ warning('libbpf skeleton test failed, disabling')
823
+ endif
824
+endif
825
+
826
if get_option('cfi')
827
cfi_flags=[]
828
# Check for dependency on LTO
829
@@ -XXX,XX +XXX,XX @@ endif
830
config_host_data.set('CONFIG_GTK', gtk.found())
831
config_host_data.set('CONFIG_LIBATTR', have_old_libattr)
832
config_host_data.set('CONFIG_LIBCAP_NG', libcap_ng.found())
833
+config_host_data.set('CONFIG_EBPF', libbpf.found())
834
config_host_data.set('CONFIG_LIBISCSI', libiscsi.found())
835
config_host_data.set('CONFIG_LIBNFS', libnfs.found())
836
config_host_data.set('CONFIG_RBD', rbd.found())
837
@@ -XXX,XX +XXX,XX @@ if have_system
838
'backends',
839
'backends/tpm',
840
'chardev',
841
+ 'ebpf',
842
'hw/9pfs',
843
'hw/acpi',
844
'hw/adc',
845
@@ -XXX,XX +XXX,XX @@ subdir('accel')
846
subdir('plugins')
847
subdir('bsd-user')
848
subdir('linux-user')
849
+subdir('ebpf')
850
+
851
+common_ss.add(libbpf)
852
853
bsd_user_ss.add(files('gdbstub.c'))
854
specific_ss.add_all(when: 'CONFIG_BSD_USER', if_true: bsd_user_ss)
855
@@ -XXX,XX +XXX,XX @@ summary_info += {'RDMA support': config_host.has_key('CONFIG_RDMA')}
856
summary_info += {'PVRDMA support': config_host.has_key('CONFIG_PVRDMA')}
857
summary_info += {'fdt support': fdt_opt == 'disabled' ? false : fdt_opt}
858
summary_info += {'libcap-ng support': libcap_ng.found()}
859
+summary_info += {'bpf support': libbpf.found()}
860
# TODO: add back protocol and server version
861
summary_info += {'spice support': config_host.has_key('CONFIG_SPICE')}
862
summary_info += {'rbd support': rbd.found()}
863
diff --git a/meson_options.txt b/meson_options.txt
864
index XXXXXXX..XXXXXXX 100644
865
--- a/meson_options.txt
866
+++ b/meson_options.txt
867
@@ -XXX,XX +XXX,XX @@ option('bzip2', type : 'feature', value : 'auto',
868
description: 'bzip2 support for DMG images')
869
option('cap_ng', type : 'feature', value : 'auto',
870
description: 'cap_ng support')
871
+option('bpf', type : 'feature', value : 'auto',
872
+ description: 'eBPF support')
873
option('cocoa', type : 'feature', value : 'auto',
874
description: 'Cocoa user interface (macOS only)')
875
option('curl', type : 'feature', value : 'auto',
876
--
877
2.7.4
878
879
diff view generated by jsdifflib
[Qemu-devel] [PULL 2/2] Revert "Change net/socket.c to use socket_*() functions" again
[PULL 5/7] virtio-net: Added eBPF RSS to virtio-net.
1
From: "Daniel P. Berrange" <berrange@redhat.com>
1
From: Andrew Melnychenko <andrew@daynix.com>
2
2
3
This reverts commit 883e4f7624e10b98d16d9adaffb8b1795664d899.
3
When RSS is enabled the device tries to load the eBPF program
4
4
to select RX virtqueue in the TUN. If eBPF can be loaded
5
This code changed net/socket.c from using socket()+connect(),
5
the RSS will function also with vhost (works with kernel 5.8 and later).
6
to using socket_connect(). In theory this is great, but in
6
Software RSS is used as a fallback with vhost=off when eBPF can't be loaded
7
practice this has completely broken the ability to connect
7
or when hash population requested by the guest.
8
the frontend and backend:
8
9
9
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
10
$ ./x86_64-softmmu/qemu-system-x86_64 \
10
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
11
-device e1000,id=e0,netdev=hn0,mac=DE:AD:BE:EF:AF:05 \
12
-netdev socket,id=hn0,connect=localhost:1234
13
qemu-system-x86_64: -device e1000,id=e0,netdev=hn0,mac=DE:AD:BE:EF:AF:05: Property 'e1000.netdev' can't find value 'hn0'
14
15
The old code would call net_socket_fd_init() synchronously,
16
while letting the connect() complete in the backgorund. The
17
new code moved net_socket_fd_init() so that it is only called
18
after connect() completes in the background.
19
20
Thus at the time we initialize the NIC frontend, the backend
21
does not exist.
22
23
The socket_connect() conversion as done is a bad fit for the
24
current code, since it did not try to change the way it deals
25
with async connection completion. Rather than try to fix this,
26
just revert the socket_connect() conversion entirely.
27
28
The code is about to be converted to use QIOChannel which
29
will let the problem be solved in a cleaner manner. This
30
revert is more suitable for stable branches in the meantime.
31
32
Signed-off-by: Daniel P. Berrange <berrange@redhat.com>
33
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
34
Signed-off-by: Jason Wang <jasowang@redhat.com>
11
Signed-off-by: Jason Wang <jasowang@redhat.com>
35
---
12
---
36
net/socket.c | 127 ++++++++++++++++++++++++++---------------------------------
13
hw/net/vhost_net.c | 3 ++
37
1 file changed, 56 insertions(+), 71 deletions(-)
14
hw/net/virtio-net.c | 116 +++++++++++++++++++++++++++++++++++++++--
38
15
include/hw/virtio/virtio-net.h | 4 ++
39
diff --git a/net/socket.c b/net/socket.c
16
net/vhost-vdpa.c | 2 +
40
index XXXXXXX..XXXXXXX 100644
17
4 files changed, 122 insertions(+), 3 deletions(-)
41
--- a/net/socket.c
18
42
+++ b/net/socket.c
19
diff --git a/hw/net/vhost_net.c b/hw/net/vhost_net.c
43
@@ -XXX,XX +XXX,XX @@ static int net_socket_listen_init(NetClientState *peer,
20
index XXXXXXX..XXXXXXX 100644
21
--- a/hw/net/vhost_net.c
22
+++ b/hw/net/vhost_net.c
23
@@ -XXX,XX +XXX,XX @@ static const int kernel_feature_bits[] = {
24
VIRTIO_NET_F_MTU,
25
VIRTIO_F_IOMMU_PLATFORM,
26
VIRTIO_F_RING_PACKED,
27
+ VIRTIO_NET_F_HASH_REPORT,
28
VHOST_INVALID_FEATURE_BIT
29
};
30
31
@@ -XXX,XX +XXX,XX @@ static const int user_feature_bits[] = {
32
VIRTIO_NET_F_MTU,
33
VIRTIO_F_IOMMU_PLATFORM,
34
VIRTIO_F_RING_PACKED,
35
+ VIRTIO_NET_F_RSS,
36
+ VIRTIO_NET_F_HASH_REPORT,
37
38
/* This bit implies RARP isn't sent by QEMU out of band */
39
VIRTIO_NET_F_GUEST_ANNOUNCE,
40
diff --git a/hw/net/virtio-net.c b/hw/net/virtio-net.c
41
index XXXXXXX..XXXXXXX 100644
42
--- a/hw/net/virtio-net.c
43
+++ b/hw/net/virtio-net.c
44
@@ -XXX,XX +XXX,XX @@ static uint64_t virtio_net_get_features(VirtIODevice *vdev, uint64_t features,
45
return features;
46
}
47
48
- virtio_clear_feature(&features, VIRTIO_NET_F_RSS);
49
- virtio_clear_feature(&features, VIRTIO_NET_F_HASH_REPORT);
50
+ if (!ebpf_rss_is_loaded(&n->ebpf_rss)) {
51
+ virtio_clear_feature(&features, VIRTIO_NET_F_RSS);
52
+ }
53
features = vhost_net_get_features(get_vhost_net(nc->peer), features);
54
vdev->backend_features = features;
55
56
@@ -XXX,XX +XXX,XX @@ static int virtio_net_handle_announce(VirtIONet *n, uint8_t cmd,
57
}
58
}
59
60
+static void virtio_net_detach_epbf_rss(VirtIONet *n);
61
+
62
static void virtio_net_disable_rss(VirtIONet *n)
44
{
63
{
45
NetClientState *nc;
64
if (n->rss_data.enabled) {
46
NetSocketState *s;
65
trace_virtio_net_rss_disable();
47
- SocketAddress *saddr;
66
}
48
- int ret;
67
n->rss_data.enabled = false;
49
- Error *local_error = NULL;
68
+
50
+ struct sockaddr_in saddr;
69
+ virtio_net_detach_epbf_rss(n);
51
+ int fd, ret;
70
+}
52
71
+
53
- saddr = socket_parse(host_str, &local_error);
72
+static bool virtio_net_attach_ebpf_to_backend(NICState *nic, int prog_fd)
54
- if (saddr == NULL) {
73
+{
55
- error_report_err(local_error);
74
+ NetClientState *nc = qemu_get_peer(qemu_get_queue(nic), 0);
56
+ if (parse_host_port(&saddr, host_str) < 0)
75
+ if (nc == NULL || nc->info->set_steering_ebpf == NULL) {
57
+ return -1;
76
+ return false;
58
+
77
+ }
59
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
78
+
60
+ if (fd < 0) {
79
+ return nc->info->set_steering_ebpf(nc, prog_fd);
61
+ perror("socket");
80
+}
81
+
82
+static void rss_data_to_rss_config(struct VirtioNetRssData *data,
83
+ struct EBPFRSSConfig *config)
84
+{
85
+ config->redirect = data->redirect;
86
+ config->populate_hash = data->populate_hash;
87
+ config->hash_types = data->hash_types;
88
+ config->indirections_len = data->indirections_len;
89
+ config->default_queue = data->default_queue;
90
+}
91
+
92
+static bool virtio_net_attach_epbf_rss(VirtIONet *n)
93
+{
94
+ struct EBPFRSSConfig config = {};
95
+
96
+ if (!ebpf_rss_is_loaded(&n->ebpf_rss)) {
97
+ return false;
98
+ }
99
+
100
+ rss_data_to_rss_config(&n->rss_data, &config);
101
+
102
+ if (!ebpf_rss_set_all(&n->ebpf_rss, &config,
103
+ n->rss_data.indirections_table, n->rss_data.key)) {
104
+ return false;
105
+ }
106
+
107
+ if (!virtio_net_attach_ebpf_to_backend(n->nic, n->ebpf_rss.program_fd)) {
108
+ return false;
109
+ }
110
+
111
+ return true;
112
+}
113
+
114
+static void virtio_net_detach_epbf_rss(VirtIONet *n)
115
+{
116
+ virtio_net_attach_ebpf_to_backend(n->nic, -1);
117
+}
118
+
119
+static bool virtio_net_load_ebpf(VirtIONet *n)
120
+{
121
+ if (!virtio_net_attach_ebpf_to_backend(n->nic, -1)) {
122
+ /* backend does't support steering ebpf */
123
+ return false;
124
+ }
125
+
126
+ return ebpf_rss_load(&n->ebpf_rss);
127
+}
128
+
129
+static void virtio_net_unload_ebpf(VirtIONet *n)
130
+{
131
+ virtio_net_attach_ebpf_to_backend(n->nic, -1);
132
+ ebpf_rss_unload(&n->ebpf_rss);
133
}
134
135
static uint16_t virtio_net_handle_rss(VirtIONet *n,
136
@@ -XXX,XX +XXX,XX @@ static uint16_t virtio_net_handle_rss(VirtIONet *n,
137
goto error;
138
}
139
n->rss_data.enabled = true;
140
+
141
+ if (!n->rss_data.populate_hash) {
142
+ if (!virtio_net_attach_epbf_rss(n)) {
143
+ /* EBPF must be loaded for vhost */
144
+ if (get_vhost_net(qemu_get_queue(n->nic)->peer)) {
145
+ warn_report("Can't load eBPF RSS for vhost");
146
+ goto error;
147
+ }
148
+ /* fallback to software RSS */
149
+ warn_report("Can't load eBPF RSS - fallback to software RSS");
150
+ n->rss_data.enabled_software_rss = true;
151
+ }
152
+ } else {
153
+ /* use software RSS for hash populating */
154
+ /* and detach eBPF if was loaded before */
155
+ virtio_net_detach_epbf_rss(n);
156
+ n->rss_data.enabled_software_rss = true;
157
+ }
158
+
159
trace_virtio_net_rss_enable(n->rss_data.hash_types,
160
n->rss_data.indirections_len,
161
temp.b);
162
@@ -XXX,XX +XXX,XX @@ static ssize_t virtio_net_receive_rcu(NetClientState *nc, const uint8_t *buf,
62
return -1;
163
return -1;
63
}
164
}
64
+ qemu_set_nonblock(fd);
165
65
+
166
- if (!no_rss && n->rss_data.enabled) {
66
+ socket_set_fast_reuse(fd);
167
+ if (!no_rss && n->rss_data.enabled && n->rss_data.enabled_software_rss) {
67
168
int index = virtio_net_process_rss(nc, buf, size);
68
- ret = socket_listen(saddr, &local_error);
169
if (index >= 0) {
69
+ ret = bind(fd, (struct sockaddr *)&saddr, sizeof(saddr));
170
NetClientState *nc2 = qemu_get_subqueue(n->nic, index);
70
if (ret < 0) {
171
@@ -XXX,XX +XXX,XX @@ static int virtio_net_post_load_device(void *opaque, int version_id)
71
- qapi_free_SocketAddress(saddr);
172
}
72
- error_report_err(local_error);
173
73
+ perror("bind");
174
if (n->rss_data.enabled) {
74
+ closesocket(fd);
175
+ n->rss_data.enabled_software_rss = n->rss_data.populate_hash;
75
+ return -1;
176
+ if (!n->rss_data.populate_hash) {
76
+ }
177
+ if (!virtio_net_attach_epbf_rss(n)) {
77
+ ret = listen(fd, 0);
178
+ if (get_vhost_net(qemu_get_queue(n->nic)->peer)) {
78
+ if (ret < 0) {
179
+ warn_report("Can't post-load eBPF RSS for vhost");
79
+ perror("listen");
180
+ } else {
80
+ closesocket(fd);
181
+ warn_report("Can't post-load eBPF RSS - "
81
return -1;
182
+ "fallback to software RSS");
82
}
183
+ n->rss_data.enabled_software_rss = true;
83
184
+ }
84
nc = qemu_new_net_client(&net_socket_info, peer, model, name);
85
s = DO_UPCAST(NetSocketState, nc, nc);
86
s->fd = -1;
87
- s->listen_fd = ret;
88
+ s->listen_fd = fd;
89
s->nc.link_down = true;
90
net_socket_rs_init(&s->rs, net_socket_rs_finalize);
91
92
qemu_set_fd_handler(s->listen_fd, net_socket_accept, NULL, s);
93
- qapi_free_SocketAddress(saddr);
94
return 0;
95
}
96
97
-typedef struct {
98
- NetClientState *peer;
99
- SocketAddress *saddr;
100
- char *model;
101
- char *name;
102
-} socket_connect_data;
103
-
104
-static void socket_connect_data_free(socket_connect_data *c)
105
-{
106
- qapi_free_SocketAddress(c->saddr);
107
- g_free(c->model);
108
- g_free(c->name);
109
- g_free(c);
110
-}
111
-
112
-static void net_socket_connected(int fd, Error *err, void *opaque)
113
-{
114
- socket_connect_data *c = opaque;
115
- NetSocketState *s;
116
- char *addr_str = NULL;
117
- Error *local_error = NULL;
118
-
119
- addr_str = socket_address_to_string(c->saddr, &local_error);
120
- if (addr_str == NULL) {
121
- error_report_err(local_error);
122
- closesocket(fd);
123
- goto end;
124
- }
125
-
126
- s = net_socket_fd_init(c->peer, c->model, c->name, fd, true);
127
- if (!s) {
128
- closesocket(fd);
129
- goto end;
130
- }
131
-
132
- snprintf(s->nc.info_str, sizeof(s->nc.info_str),
133
- "socket: connect to %s", addr_str);
134
-
135
-end:
136
- g_free(addr_str);
137
- socket_connect_data_free(c);
138
-}
139
-
140
static int net_socket_connect_init(NetClientState *peer,
141
const char *model,
142
const char *name,
143
const char *host_str)
144
{
145
- socket_connect_data *c = g_new0(socket_connect_data, 1);
146
- int fd = -1;
147
- Error *local_error = NULL;
148
+ NetSocketState *s;
149
+ int fd, connected, ret;
150
+ struct sockaddr_in saddr;
151
152
- c->peer = peer;
153
- c->model = g_strdup(model);
154
- c->name = g_strdup(name);
155
- c->saddr = socket_parse(host_str, &local_error);
156
- if (c->saddr == NULL) {
157
- goto err;
158
- }
159
+ if (parse_host_port(&saddr, host_str) < 0)
160
+ return -1;
161
162
- fd = socket_connect(c->saddr, net_socket_connected, c, &local_error);
163
+ fd = qemu_socket(PF_INET, SOCK_STREAM, 0);
164
if (fd < 0) {
165
- goto err;
166
+ perror("socket");
167
+ return -1;
168
}
169
+ qemu_set_nonblock(fd);
170
171
+ connected = 0;
172
+ for(;;) {
173
+ ret = connect(fd, (struct sockaddr *)&saddr, sizeof(saddr));
174
+ if (ret < 0) {
175
+ if (errno == EINTR || errno == EWOULDBLOCK) {
176
+ /* continue */
177
+ } else if (errno == EINPROGRESS ||
178
+ errno == EALREADY ||
179
+ errno == EINVAL) {
180
+ break;
181
+ } else {
182
+ perror("connect");
183
+ closesocket(fd);
184
+ return -1;
185
+ }
185
+ }
186
+ } else {
187
+ connected = 1;
188
+ break;
189
+ }
186
+ }
190
+ }
187
+
191
+ s = net_socket_fd_init(peer, model, name, fd, connected);
188
trace_virtio_net_rss_enable(n->rss_data.hash_types,
192
+ if (!s)
189
n->rss_data.indirections_len,
193
+ return -1;
190
sizeof(n->rss_data.key));
194
+ snprintf(s->nc.info_str, sizeof(s->nc.info_str),
191
@@ -XXX,XX +XXX,XX @@ static void virtio_net_device_realize(DeviceState *dev, Error **errp)
195
+ "socket: connect to %s:%d",
192
n->qdev = dev;
196
+ inet_ntoa(saddr.sin_addr), ntohs(saddr.sin_port));
193
197
return 0;
194
net_rx_pkt_init(&n->rx_pkt, false);
198
-
195
+
199
-err:
196
+ if (virtio_has_feature(n->host_features, VIRTIO_NET_F_RSS)) {
200
- error_report_err(local_error);
197
+ virtio_net_load_ebpf(n);
201
- socket_connect_data_free(c);
198
+ }
202
- return -1;
199
}
203
}
200
204
201
static void virtio_net_device_unrealize(DeviceState *dev)
205
static int net_socket_mcast_init(NetClientState *peer,
202
@@ -XXX,XX +XXX,XX @@ static void virtio_net_device_unrealize(DeviceState *dev)
203
VirtIONet *n = VIRTIO_NET(dev);
204
int i, max_queues;
205
206
+ if (virtio_has_feature(n->host_features, VIRTIO_NET_F_RSS)) {
207
+ virtio_net_unload_ebpf(n);
208
+ }
209
+
210
/* This will stop vhost backend if appropriate. */
211
virtio_net_set_status(vdev, 0);
212
213
@@ -XXX,XX +XXX,XX @@ static void virtio_net_instance_init(Object *obj)
214
device_add_bootindex_property(obj, &n->nic_conf.bootindex,
215
"bootindex", "/ethernet-phy@0",
216
DEVICE(n));
217
+
218
+ ebpf_rss_init(&n->ebpf_rss);
219
}
220
221
static int virtio_net_pre_save(void *opaque)
222
diff --git a/include/hw/virtio/virtio-net.h b/include/hw/virtio/virtio-net.h
223
index XXXXXXX..XXXXXXX 100644
224
--- a/include/hw/virtio/virtio-net.h
225
+++ b/include/hw/virtio/virtio-net.h
226
@@ -XXX,XX +XXX,XX @@
227
#include "qemu/option_int.h"
228
#include "qom/object.h"
229
230
+#include "ebpf/ebpf_rss.h"
231
+
232
#define TYPE_VIRTIO_NET "virtio-net-device"
233
OBJECT_DECLARE_SIMPLE_TYPE(VirtIONet, VIRTIO_NET)
234
235
@@ -XXX,XX +XXX,XX @@ typedef struct VirtioNetRscChain {
236
237
typedef struct VirtioNetRssData {
238
bool enabled;
239
+ bool enabled_software_rss;
240
bool redirect;
241
bool populate_hash;
242
uint32_t hash_types;
243
@@ -XXX,XX +XXX,XX @@ struct VirtIONet {
244
Notifier migration_state;
245
VirtioNetRssData rss_data;
246
struct NetRxPkt *rx_pkt;
247
+ struct EBPFRSSContext ebpf_rss;
248
};
249
250
void virtio_net_set_netclient_name(VirtIONet *n, const char *name,
251
diff --git a/net/vhost-vdpa.c b/net/vhost-vdpa.c
252
index XXXXXXX..XXXXXXX 100644
253
--- a/net/vhost-vdpa.c
254
+++ b/net/vhost-vdpa.c
255
@@ -XXX,XX +XXX,XX @@ const int vdpa_feature_bits[] = {
256
VIRTIO_NET_F_MTU,
257
VIRTIO_F_IOMMU_PLATFORM,
258
VIRTIO_F_RING_PACKED,
259
+ VIRTIO_NET_F_RSS,
260
+ VIRTIO_NET_F_HASH_REPORT,
261
VIRTIO_NET_F_GUEST_ANNOUNCE,
262
VIRTIO_NET_F_STATUS,
263
VHOST_INVALID_FEATURE_BIT
206
--
264
--
207
2.7.4
265
2.7.4
208
266
209
267
diff view generated by jsdifflib
New patch
[PULL 6/7] docs: Added eBPF documentation.
1
From: Andrew Melnychenko <andrew@daynix.com>
1
2
3
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
4
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
5
Signed-off-by: Jason Wang <jasowang@redhat.com>
6
---
7
docs/devel/ebpf_rss.rst | 125 ++++++++++++++++++++++++++++++++++++++++++++++++
8
docs/devel/index.rst | 1 +
9
2 files changed, 126 insertions(+)
10
create mode 100644 docs/devel/ebpf_rss.rst
11
12
diff --git a/docs/devel/ebpf_rss.rst b/docs/devel/ebpf_rss.rst
13
new file mode 100644
14
index XXXXXXX..XXXXXXX
15
--- /dev/null
16
+++ b/docs/devel/ebpf_rss.rst
17
@@ -XXX,XX +XXX,XX @@
18
+===========================
19
+eBPF RSS virtio-net support
20
+===========================
21
+
22
+RSS(Receive Side Scaling) is used to distribute network packets to guest virtqueues
23
+by calculating packet hash. Usually every queue is processed then by a specific guest CPU core.
24
+
25
+For now there are 2 RSS implementations in qemu:
26
+- 'in-qemu' RSS (functions if qemu receives network packets, i.e. vhost=off)
27
+- eBPF RSS (can function with also with vhost=on)
28
+
29
+eBPF support (CONFIG_EBPF) is enabled by 'configure' script.
30
+To enable eBPF RSS support use './configure --enable-bpf'.
31
+
32
+If steering BPF is not set for kernel's TUN module, the TUN uses automatic selection
33
+of rx virtqueue based on lookup table built according to calculated symmetric hash
34
+of transmitted packets.
35
+If steering BPF is set for TUN the BPF code calculates the hash of packet header and
36
+returns the virtqueue number to place the packet to.
37
+
38
+Simplified decision formula:
39
+
40
+.. code:: C
41
+
42
+ queue_index = indirection_table[hash(<packet data>)%<indirection_table size>]
43
+
44
+
45
+Not for all packets, the hash can/should be calculated.
46
+
47
+Note: currently, eBPF RSS does not support hash reporting.
48
+
49
+eBPF RSS turned on by different combinations of vhost-net, vitrio-net and tap configurations:
50
+
51
+- eBPF is used:
52
+
53
+ tap,vhost=off & virtio-net-pci,rss=on,hash=off
54
+
55
+- eBPF is used:
56
+
57
+ tap,vhost=on & virtio-net-pci,rss=on,hash=off
58
+
59
+- 'in-qemu' RSS is used:
60
+
61
+ tap,vhost=off & virtio-net-pci,rss=on,hash=on
62
+
63
+- eBPF is used, hash population feature is not reported to the guest:
64
+
65
+ tap,vhost=on & virtio-net-pci,rss=on,hash=on
66
+
67
+If CONFIG_EBPF is not set then only 'in-qemu' RSS is supported.
68
+Also 'in-qemu' RSS, as a fallback, is used if the eBPF program failed to load or set to TUN.
69
+
70
+RSS eBPF program
71
+----------------
72
+
73
+RSS program located in ebpf/rss.bpf.skeleton.h generated by bpftool.
74
+So the program is part of the qemu binary.
75
+Initially, the eBPF program was compiled by clang and source code located at tools/ebpf/rss.bpf.c.
76
+Prerequisites to recompile the eBPF program (regenerate ebpf/rss.bpf.skeleton.h):
77
+
78
+ llvm, clang, kernel source tree, bpftool
79
+ Adjust Makefile.ebpf to reflect the location of the kernel source tree
80
+
81
+ $ cd tools/ebpf
82
+ $ make -f Makefile.ebpf
83
+
84
+Current eBPF RSS implementation uses 'bounded loops' with 'backward jump instructions' which present in the last kernels.
85
+Overall eBPF RSS works on kernels 5.8+.
86
+
87
+eBPF RSS implementation
88
+-----------------------
89
+
90
+eBPF RSS loading functionality located in ebpf/ebpf_rss.c and ebpf/ebpf_rss.h.
91
+
92
+The `struct EBPFRSSContext` structure that holds 4 file descriptors:
93
+
94
+- ctx - pointer of the libbpf context.
95
+- program_fd - file descriptor of the eBPF RSS program.
96
+- map_configuration - file descriptor of the 'configuration' map. This map contains one element of 'struct EBPFRSSConfig'. This configuration determines eBPF program behavior.
97
+- map_toeplitz_key - file descriptor of the 'Toeplitz key' map. One element of the 40byte key prepared for the hashing algorithm.
98
+- map_indirections_table - 128 elements of queue indexes.
99
+
100
+`struct EBPFRSSConfig` fields:
101
+
102
+- redirect - "boolean" value, should the hash be calculated, on false - `default_queue` would be used as the final decision.
103
+- populate_hash - for now, not used. eBPF RSS doesn't support hash reporting.
104
+- hash_types - binary mask of different hash types. See `VIRTIO_NET_RSS_HASH_TYPE_*` defines. If for packet hash should not be calculated - `default_queue` would be used.
105
+- indirections_len - length of the indirections table, maximum 128.
106
+- default_queue - the queue index that used for packet that shouldn't be hashed. For some packets, the hash can't be calculated(g.e ARP).
107
+
108
+Functions:
109
+
110
+- `ebpf_rss_init()` - sets ctx to NULL, which indicates that EBPFRSSContext is not loaded.
111
+- `ebpf_rss_load()` - creates 3 maps and loads eBPF program from the rss.bpf.skeleton.h. Returns 'true' on success. After that, program_fd can be used to set steering for TAP.
112
+- `ebpf_rss_set_all()` - sets values for eBPF maps. `indirections_table` length is in EBPFRSSConfig. `toeplitz_key` is VIRTIO_NET_RSS_MAX_KEY_SIZE aka 40 bytes array.
113
+- `ebpf_rss_unload()` - close all file descriptors and set ctx to NULL.
114
+
115
+Simplified eBPF RSS workflow:
116
+
117
+.. code:: C
118
+
119
+ struct EBPFRSSConfig config;
120
+ config.redirect = 1;
121
+ config.hash_types = VIRTIO_NET_RSS_HASH_TYPE_UDPv4 | VIRTIO_NET_RSS_HASH_TYPE_TCPv4;
122
+ config.indirections_len = VIRTIO_NET_RSS_MAX_TABLE_LEN;
123
+ config.default_queue = 0;
124
+
125
+ uint16_t table[VIRTIO_NET_RSS_MAX_TABLE_LEN] = {...};
126
+ uint8_t key[VIRTIO_NET_RSS_MAX_KEY_SIZE] = {...};
127
+
128
+ struct EBPFRSSContext ctx;
129
+ ebpf_rss_init(&ctx);
130
+ ebpf_rss_load(&ctx);
131
+ ebpf_rss_set_all(&ctx, &config, table, key);
132
+ if (net_client->info->set_steering_ebpf != NULL) {
133
+ net_client->info->set_steering_ebpf(net_client, ctx->program_fd);
134
+ }
135
+ ...
136
+ ebpf_unload(&ctx);
137
+
138
+
139
+NetClientState SetSteeringEBPF()
140
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
141
+
142
+For now, `set_steering_ebpf()` method supported by Linux TAP NetClientState. The method requires an eBPF program file descriptor as an argument.
143
diff --git a/docs/devel/index.rst b/docs/devel/index.rst
144
index XXXXXXX..XXXXXXX 100644
145
--- a/docs/devel/index.rst
146
+++ b/docs/devel/index.rst
147
@@ -XXX,XX +XXX,XX @@ Contents:
148
qom
149
block-coroutine-wrapper
150
multi-process
151
+ ebpf_rss
152
--
153
2.7.4
154
155
diff view generated by jsdifflib
[Qemu-devel] [PULL 1/2] net/rocker: Cleanup the useless return value check
[PULL 7/7] MAINTAINERS: Added eBPF maintainers information.
1
From: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
1
From: Andrew Melnychenko <andrew@daynix.com>
2
2
3
None of pci_dma_read()'s callers check the return value except
3
Signed-off-by: Yuri Benditovich <yuri.benditovich@daynix.com>
4
rocker. There is no need to check it because it always return
4
Signed-off-by: Andrew Melnychenko <andrew@daynix.com>
5
0. So the check work is useless. Remove it entirely.
6
7
Suggested-by: Markus Armbruster <armbru@redhat.com>
8
Signed-off-by: Mao Zhongyi <maozy.fnst@cn.fujitsu.com>
9
Signed-off-by: Jason Wang <jasowang@redhat.com>
5
Signed-off-by: Jason Wang <jasowang@redhat.com>
10
---
6
---
11
hw/net/rocker/rocker.c | 9 +++------
7
MAINTAINERS | 8 ++++++++
12
hw/net/rocker/rocker_desc.c | 4 +---
8
1 file changed, 8 insertions(+)
13
2 files changed, 4 insertions(+), 9 deletions(-)
14
9
15
diff --git a/hw/net/rocker/rocker.c b/hw/net/rocker/rocker.c
10
diff --git a/MAINTAINERS b/MAINTAINERS
16
index XXXXXXX..XXXXXXX 100644
11
index XXXXXXX..XXXXXXX 100644
17
--- a/hw/net/rocker/rocker.c
12
--- a/MAINTAINERS
18
+++ b/hw/net/rocker/rocker.c
13
+++ b/MAINTAINERS
19
@@ -XXX,XX +XXX,XX @@ static int tx_consume(Rocker *r, DescInfo *info)
14
@@ -XXX,XX +XXX,XX @@ F: include/hw/remote/proxy-memory-listener.h
20
goto err_no_mem;
15
F: hw/remote/iohub.c
21
}
16
F: include/hw/remote/iohub.h
22
17
23
- if (pci_dma_read(dev, frag_addr, iov[iovcnt].iov_base,
18
+EBPF:
24
- iov[iovcnt].iov_len)) {
19
+M: Jason Wang <jasowang@redhat.com>
25
- err = -ROCKER_ENXIO;
20
+R: Andrew Melnychenko <andrew@daynix.com>
26
- goto err_bad_io;
21
+R: Yuri Benditovich <yuri.benditovich@daynix.com>
27
- }
22
+S: Maintained
28
+ pci_dma_read(dev, frag_addr, iov[iovcnt].iov_base,
23
+F: ebpf/*
29
+ iov[iovcnt].iov_len);
24
+F: tools/ebpf/*
30
+
25
+
31
iovcnt++;
26
Build and test automation
32
}
27
-------------------------
33
28
Build and test automation, general continuous integration
34
@@ -XXX,XX +XXX,XX @@ static int tx_consume(Rocker *r, DescInfo *info)
35
err = fp_port_eg(r->fp_port[port], iov, iovcnt);
36
37
err_too_many_frags:
38
-err_bad_io:
39
err_no_mem:
40
err_bad_attr:
41
for (i = 0; i < ROCKER_TX_FRAGS_MAX; i++) {
42
diff --git a/hw/net/rocker/rocker_desc.c b/hw/net/rocker/rocker_desc.c
43
index XXXXXXX..XXXXXXX 100644
44
--- a/hw/net/rocker/rocker_desc.c
45
+++ b/hw/net/rocker/rocker_desc.c
46
@@ -XXX,XX +XXX,XX @@ char *desc_get_buf(DescInfo *info, bool read_only)
47
return NULL;
48
}
49
50
- if (pci_dma_read(dev, le64_to_cpu(info->desc.buf_addr), info->buf, size)) {
51
- return NULL;
52
- }
53
+ pci_dma_read(dev, le64_to_cpu(info->desc.buf_addr), info->buf, size);
54
55
return info->buf;
56
}
57
--
29
--
58
2.7.4
30
2.7.4
59
31
60
32
diff view generated by jsdifflib

Patchew 2.1-devel-b67e4c2

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