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-rw-r--r--src/shared/netif-sriov.c643
1 files changed, 643 insertions, 0 deletions
diff --git a/src/shared/netif-sriov.c b/src/shared/netif-sriov.c
new file mode 100644
index 0000000..7559b0d
--- /dev/null
+++ b/src/shared/netif-sriov.c
@@ -0,0 +1,643 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+
+#include "alloc-util.h"
+#include "device-util.h"
+#include "netlink-util.h"
+#include "netif-sriov.h"
+#include "parse-util.h"
+#include "set.h"
+#include "stdio-util.h"
+#include "string-util.h"
+
+static int sr_iov_new(SRIOV **ret) {
+ SRIOV *sr_iov;
+
+ assert(ret);
+
+ sr_iov = new(SRIOV, 1);
+ if (!sr_iov)
+ return -ENOMEM;
+
+ *sr_iov = (SRIOV) {
+ .vf = UINT32_MAX,
+ .vlan_proto = ETH_P_8021Q,
+ .vf_spoof_check_setting = -1,
+ .trust = -1,
+ .query_rss = -1,
+ .link_state = _SR_IOV_LINK_STATE_INVALID,
+ };
+
+ *ret = TAKE_PTR(sr_iov);
+
+ return 0;
+}
+
+static int sr_iov_new_static(OrderedHashmap **sr_iov_by_section, const char *filename, unsigned section_line, SRIOV **ret) {
+ _cleanup_(config_section_freep) ConfigSection *n = NULL;
+ _cleanup_(sr_iov_freep) SRIOV *sr_iov = NULL;
+ SRIOV *existing = NULL;
+ int r;
+
+ assert(sr_iov_by_section);
+ assert(filename);
+ assert(section_line > 0);
+ assert(ret);
+
+ r = config_section_new(filename, section_line, &n);
+ if (r < 0)
+ return r;
+
+ existing = ordered_hashmap_get(*sr_iov_by_section, n);
+ if (existing) {
+ *ret = existing;
+ return 0;
+ }
+
+ r = sr_iov_new(&sr_iov);
+ if (r < 0)
+ return r;
+
+ r = ordered_hashmap_ensure_put(sr_iov_by_section, &config_section_hash_ops, n, sr_iov);
+ if (r < 0)
+ return r;
+
+ sr_iov->section = TAKE_PTR(n);
+ sr_iov->sr_iov_by_section = *sr_iov_by_section;
+
+ *ret = TAKE_PTR(sr_iov);
+ return 0;
+}
+
+SRIOV *sr_iov_free(SRIOV *sr_iov) {
+ if (!sr_iov)
+ return NULL;
+
+ if (sr_iov->sr_iov_by_section && sr_iov->section)
+ ordered_hashmap_remove(sr_iov->sr_iov_by_section, sr_iov->section);
+
+ config_section_free(sr_iov->section);
+
+ return mfree(sr_iov);
+}
+
+void sr_iov_hash_func(const SRIOV *sr_iov, struct siphash *state) {
+ assert(sr_iov);
+ assert(state);
+
+ siphash24_compress(&sr_iov->vf, sizeof(sr_iov->vf), state);
+}
+
+int sr_iov_compare_func(const SRIOV *s1, const SRIOV *s2) {
+ assert(s1);
+ assert(s2);
+
+ return CMP(s1->vf, s2->vf);
+}
+
+DEFINE_PRIVATE_HASH_OPS(
+ sr_iov_hash_ops,
+ SRIOV,
+ sr_iov_hash_func,
+ sr_iov_compare_func);
+
+int sr_iov_set_netlink_message(SRIOV *sr_iov, sd_netlink_message *req) {
+ int r;
+
+ assert(sr_iov);
+ assert(req);
+
+ r = sd_netlink_message_open_container(req, IFLA_VFINFO_LIST);
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_open_container(req, IFLA_VF_INFO);
+ if (r < 0)
+ return r;
+
+ if (!ether_addr_is_null(&sr_iov->mac)) {
+ struct ifla_vf_mac ivm = {
+ .vf = sr_iov->vf,
+ };
+
+ memcpy(ivm.mac, &sr_iov->mac, ETH_ALEN);
+ r = sd_netlink_message_append_data(req, IFLA_VF_MAC, &ivm, sizeof(struct ifla_vf_mac));
+ if (r < 0)
+ return r;
+ }
+
+ if (sr_iov->vf_spoof_check_setting >= 0) {
+ struct ifla_vf_spoofchk ivs = {
+ .vf = sr_iov->vf,
+ .setting = sr_iov->vf_spoof_check_setting,
+ };
+
+ r = sd_netlink_message_append_data(req, IFLA_VF_SPOOFCHK, &ivs, sizeof(struct ifla_vf_spoofchk));
+ if (r < 0)
+ return r;
+ }
+
+ if (sr_iov->query_rss >= 0) {
+ struct ifla_vf_rss_query_en ivs = {
+ .vf = sr_iov->vf,
+ .setting = sr_iov->query_rss,
+ };
+
+ r = sd_netlink_message_append_data(req, IFLA_VF_RSS_QUERY_EN, &ivs, sizeof(struct ifla_vf_rss_query_en));
+ if (r < 0)
+ return r;
+ }
+
+ if (sr_iov->trust >= 0) {
+ struct ifla_vf_trust ivt = {
+ .vf = sr_iov->vf,
+ .setting = sr_iov->trust,
+ };
+
+ r = sd_netlink_message_append_data(req, IFLA_VF_TRUST, &ivt, sizeof(struct ifla_vf_trust));
+ if (r < 0)
+ return r;
+ }
+
+ if (sr_iov->link_state >= 0) {
+ struct ifla_vf_link_state ivl = {
+ .vf = sr_iov->vf,
+ .link_state = sr_iov->link_state,
+ };
+
+ r = sd_netlink_message_append_data(req, IFLA_VF_LINK_STATE, &ivl, sizeof(struct ifla_vf_link_state));
+ if (r < 0)
+ return r;
+ }
+
+ if (sr_iov->vlan > 0) {
+ /* Because of padding, first the buffer must be initialized with 0. */
+ struct ifla_vf_vlan_info ivvi = {};
+ ivvi.vf = sr_iov->vf;
+ ivvi.vlan = sr_iov->vlan;
+ ivvi.qos = sr_iov->qos;
+ ivvi.vlan_proto = htobe16(sr_iov->vlan_proto);
+
+ r = sd_netlink_message_open_container(req, IFLA_VF_VLAN_LIST);
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_append_data(req, IFLA_VF_VLAN_INFO, &ivvi, sizeof(struct ifla_vf_vlan_info));
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+ }
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+
+ r = sd_netlink_message_close_container(req);
+ if (r < 0)
+ return r;
+
+ return 0;
+}
+
+int sr_iov_get_num_vfs(sd_device *device, uint32_t *ret) {
+ const char *str;
+ uint32_t n;
+ int r;
+
+ assert(device);
+ assert(ret);
+
+ r = sd_device_get_sysattr_value(device, "device/sriov_numvfs", &str);
+ if (r < 0)
+ return r;
+
+ r = safe_atou32(str, &n);
+ if (r < 0)
+ return r;
+
+ *ret = n;
+ return 0;
+}
+
+int sr_iov_set_num_vfs(sd_device *device, uint32_t num_vfs, OrderedHashmap *sr_iov_by_section) {
+ char val[DECIMAL_STR_MAX(uint32_t)];
+ const char *str;
+ int r;
+
+ assert(device);
+
+ if (num_vfs == UINT32_MAX) {
+ uint32_t current_num_vfs;
+ SRIOV *sr_iov;
+
+ /* If the number of virtual functions is not specified, then use the maximum number of VF + 1. */
+
+ num_vfs = 0;
+ ORDERED_HASHMAP_FOREACH(sr_iov, sr_iov_by_section)
+ num_vfs = MAX(num_vfs, sr_iov->vf + 1);
+
+ if (num_vfs == 0) /* No VF is configured. */
+ return 0;
+
+ r = sr_iov_get_num_vfs(device, &current_num_vfs);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "Failed to get the current number of SR-IOV virtual functions: %m");
+
+ /* Enough VFs already exist. */
+ if (num_vfs <= current_num_vfs)
+ return 0;
+
+ } else if (num_vfs == 0) {
+ r = sd_device_set_sysattr_value(device, "device/sriov_numvfs", "0");
+ if (r < 0)
+ log_device_debug_errno(device, r, "Failed to write device/sriov_numvfs sysfs attribute, ignoring: %m");
+
+ /* Gracefully handle the error in disabling VFs when the interface does not support SR-IOV. */
+ return r == -ENOENT ? 0 : r;
+ }
+
+ /* So, the interface does not have enough VFs. Before increasing the number of VFs, check the
+ * maximum allowed number of VFs from the sriov_totalvfs sysattr. Note that the sysattr
+ * currently exists only for PCI drivers. Hence, ignore -ENOENT.
+ * TODO: netdevsim provides the information in debugfs. */
+ r = sd_device_get_sysattr_value(device, "device/sriov_totalvfs", &str);
+ if (r >= 0) {
+ uint32_t max_num_vfs;
+
+ r = safe_atou32(str, &max_num_vfs);
+ if (r < 0)
+ return log_device_debug_errno(device, r, "Failed to parse device/sriov_totalvfs sysfs attribute '%s': %m", str);
+
+ if (num_vfs > max_num_vfs)
+ return log_device_debug_errno(device, SYNTHETIC_ERRNO(ERANGE),
+ "Specified number of virtual functions is out of range. "
+ "The maximum allowed value is %"PRIu32".",
+ max_num_vfs);
+
+ } else if (r != -ENOENT) /* Currently, only PCI driver has the attribute. */
+ return log_device_debug_errno(device, r, "Failed to read device/sriov_totalvfs sysfs attribute: %m");
+
+ xsprintf(val, "%"PRIu32, num_vfs);
+ r = sd_device_set_sysattr_value(device, "device/sriov_numvfs", val);
+ if (r == -EBUSY) {
+ /* Some devices e.g. netdevsim refuse to set sriov_numvfs if it has non-zero value. */
+ r = sd_device_set_sysattr_value(device, "device/sriov_numvfs", "0");
+ if (r >= 0)
+ r = sd_device_set_sysattr_value(device, "device/sriov_numvfs", val);
+ }
+ if (r < 0)
+ return log_device_debug_errno(device, r, "Failed to write device/sriov_numvfs sysfs attribute: %m");
+
+ log_device_debug(device, "device/sriov_numvfs sysfs attribute set to '%s'.", val);
+ return 0;
+}
+
+static int sr_iov_section_verify(uint32_t num_vfs, SRIOV *sr_iov) {
+ assert(sr_iov);
+
+ if (section_is_invalid(sr_iov->section))
+ return -EINVAL;
+
+ if (sr_iov->vf == UINT32_MAX)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: [SR-IOV] section without VirtualFunction= field configured. "
+ "Ignoring [SR-IOV] section from line %u.",
+ sr_iov->section->filename, sr_iov->section->line);
+
+ if (sr_iov->vf >= num_vfs)
+ return log_warning_errno(SYNTHETIC_ERRNO(EINVAL),
+ "%s: VirtualFunction= must be smaller than the value specified in SR-IOVVirtualFunctions=. "
+ "Ignoring [SR-IOV] section from line %u.",
+ sr_iov->section->filename, sr_iov->section->line);
+
+ return 0;
+}
+
+int sr_iov_drop_invalid_sections(uint32_t num_vfs, OrderedHashmap *sr_iov_by_section) {
+ _cleanup_set_free_ Set *set = NULL;
+ SRIOV *sr_iov;
+ int r;
+
+ ORDERED_HASHMAP_FOREACH(sr_iov, sr_iov_by_section) {
+ SRIOV *dup;
+
+ if (sr_iov_section_verify(num_vfs, sr_iov) < 0) {
+ sr_iov_free(sr_iov);
+ continue;
+ }
+
+ dup = set_remove(set, sr_iov);
+ if (dup) {
+ log_warning("%s: Conflicting [SR-IOV] section is specified at line %u and %u, "
+ "dropping the [SR-IOV] section specified at line %u.",
+ dup->section->filename, sr_iov->section->line,
+ dup->section->line, dup->section->line);
+ sr_iov_free(dup);
+ }
+
+ r = set_ensure_put(&set, &sr_iov_hash_ops, sr_iov);
+ if (r < 0)
+ return log_oom();
+ assert(r > 0);
+ }
+
+ return 0;
+}
+
+int config_parse_sr_iov_uint32(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(sr_iov_free_or_set_invalidp) SRIOV *sr_iov = NULL;
+ OrderedHashmap **sr_iov_by_section = ASSERT_PTR(data);
+ uint32_t k;
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = sr_iov_new_static(sr_iov_by_section, filename, section_line, &sr_iov);
+ if (r < 0)
+ return r;
+
+ if (isempty(rvalue)) {
+ if (streq(lvalue, "VirtualFunction"))
+ sr_iov->vf = UINT32_MAX;
+ else if (streq(lvalue, "VLANId"))
+ sr_iov->vlan = 0;
+ else if (streq(lvalue, "QualityOfService"))
+ sr_iov->qos = 0;
+ else
+ assert_not_reached();
+
+ TAKE_PTR(sr_iov);
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &k);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse SR-IOV '%s=', ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ if (streq(lvalue, "VLANId")) {
+ if (k == 0 || k > 4095) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid SR-IOV VLANId: %u", k);
+ return 0;
+ }
+ sr_iov->vlan = k;
+ } else if (streq(lvalue, "VirtualFunction")) {
+ if (k >= INT_MAX) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0, "Invalid SR-IOV virtual function: %u", k);
+ return 0;
+ }
+ sr_iov->vf = k;
+ } else if (streq(lvalue, "QualityOfService"))
+ sr_iov->qos = k;
+ else
+ assert_not_reached();
+
+ TAKE_PTR(sr_iov);
+ return 0;
+}
+
+int config_parse_sr_iov_vlan_proto(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(sr_iov_free_or_set_invalidp) SRIOV *sr_iov = NULL;
+ OrderedHashmap **sr_iov_by_section = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = sr_iov_new_static(sr_iov_by_section, filename, section_line, &sr_iov);
+ if (r < 0)
+ return r;
+
+ if (isempty(rvalue) || streq(rvalue, "802.1Q"))
+ sr_iov->vlan_proto = ETH_P_8021Q;
+ else if (streq(rvalue, "802.1ad"))
+ sr_iov->vlan_proto = ETH_P_8021AD;
+ else {
+ log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "Invalid SR-IOV '%s=', ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ TAKE_PTR(sr_iov);
+ return 0;
+}
+
+int config_parse_sr_iov_link_state(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(sr_iov_free_or_set_invalidp) SRIOV *sr_iov = NULL;
+ OrderedHashmap **sr_iov_by_section = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = sr_iov_new_static(sr_iov_by_section, filename, section_line, &sr_iov);
+ if (r < 0)
+ return r;
+
+ /* Unfortunately, SR_IOV_LINK_STATE_DISABLE is 2, not 0. So, we cannot use
+ * DEFINE_STRING_TABLE_LOOKUP_WITH_BOOLEAN() macro. */
+
+ if (isempty(rvalue)) {
+ sr_iov->link_state = _SR_IOV_LINK_STATE_INVALID;
+ TAKE_PTR(sr_iov);
+ return 0;
+ }
+
+ if (streq(rvalue, "auto")) {
+ sr_iov->link_state = SR_IOV_LINK_STATE_AUTO;
+ TAKE_PTR(sr_iov);
+ return 0;
+ }
+
+ r = parse_boolean(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse SR-IOV '%s=', ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ sr_iov->link_state = r ? SR_IOV_LINK_STATE_ENABLE : SR_IOV_LINK_STATE_DISABLE;
+ TAKE_PTR(sr_iov);
+ return 0;
+}
+
+int config_parse_sr_iov_boolean(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(sr_iov_free_or_set_invalidp) SRIOV *sr_iov = NULL;
+ OrderedHashmap **sr_iov_by_section = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = sr_iov_new_static(sr_iov_by_section, filename, section_line, &sr_iov);
+ if (r < 0)
+ return r;
+
+ if (isempty(rvalue)) {
+ if (streq(lvalue, "MACSpoofCheck"))
+ sr_iov->vf_spoof_check_setting = -1;
+ else if (streq(lvalue, "QueryReceiveSideScaling"))
+ sr_iov->query_rss = -1;
+ else if (streq(lvalue, "Trust"))
+ sr_iov->trust = -1;
+ else
+ assert_not_reached();
+
+ TAKE_PTR(sr_iov);
+ return 0;
+ }
+
+ r = parse_boolean(rvalue);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r, "Failed to parse '%s=', ignoring: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ if (streq(lvalue, "MACSpoofCheck"))
+ sr_iov->vf_spoof_check_setting = r;
+ else if (streq(lvalue, "QueryReceiveSideScaling"))
+ sr_iov->query_rss = r;
+ else if (streq(lvalue, "Trust"))
+ sr_iov->trust = r;
+ else
+ assert_not_reached();
+
+ TAKE_PTR(sr_iov);
+ return 0;
+}
+
+int config_parse_sr_iov_mac(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ _cleanup_(sr_iov_free_or_set_invalidp) SRIOV *sr_iov = NULL;
+ OrderedHashmap **sr_iov_by_section = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ r = sr_iov_new_static(sr_iov_by_section, filename, section_line, &sr_iov);
+ if (r < 0)
+ return r;
+
+ if (isempty(rvalue)) {
+ sr_iov->mac = ETHER_ADDR_NULL;
+ TAKE_PTR(sr_iov);
+ return 0;
+ }
+
+ r = parse_ether_addr(rvalue, &sr_iov->mac);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse SR-IOV '%s=', ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ TAKE_PTR(sr_iov);
+ return 0;
+}
+
+int config_parse_sr_iov_num_vfs(
+ const char *unit,
+ const char *filename,
+ unsigned line,
+ const char *section,
+ unsigned section_line,
+ const char *lvalue,
+ int ltype,
+ const char *rvalue,
+ void *data,
+ void *userdata) {
+
+ uint32_t n, *num_vfs = ASSERT_PTR(data);
+ int r;
+
+ assert(filename);
+ assert(lvalue);
+ assert(rvalue);
+
+ if (isempty(rvalue)) {
+ *num_vfs = UINT32_MAX;
+ return 0;
+ }
+
+ r = safe_atou32(rvalue, &n);
+ if (r < 0) {
+ log_syntax(unit, LOG_WARNING, filename, line, r,
+ "Failed to parse %s=, ignoring assignment: %s", lvalue, rvalue);
+ return 0;
+ }
+
+ if (n > INT_MAX) {
+ log_syntax(unit, LOG_WARNING, filename, line, 0,
+ "The number of SR-IOV virtual functions is too large. It must be equal to "
+ "or smaller than 2147483647. Ignoring assignment: %"PRIu32, n);
+ return 0;
+ }
+
+ *num_vfs = n;
+ return 0;
+}
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