Implementation of more netlink request types:
- netdev features (ethtool -k/-K, patches 3-6)
- private flags (--show-priv-flags / --set-priv-flags, patches 7-9)
- ring sizes (ethtool -g/-G, patches 10-12)
- channel counts (ethtool -l/-L, patches 13-15)
Patch 1 is a style cleanup suggested in part 2 review and patch 2 updates
the mapping between netdev features and legacy ioctl requests (which are
still used by ethtool for backward compatibility).
Changes in v2:
- fix netdev reference leaks in error path of ethnl_set_rings() and
ethnl_set_channels() (found by Jakub Kicinski)
- use __set_bit() rather than set_bit() (suggested by David Miller)
- in replies to RINGS_GET and CHANNELS_GET requests, omit ring and
channel types not supported by driver/device (suggested by Jakub
Kicinski)
- more descriptive message size calculations in rings_reply_size() and
channels_reply_size() (suggested by Jakub Kicinski)
- coding style cleanup (suggested by Jakub Kicinski)
Michal Kubecek (15):
ethtool: rename ethnl_parse_header() to ethnl_parse_header_dev_get()
ethtool: update mapping of features to legacy ioctl requests
ethtool: provide netdev features with FEATURES_GET request
ethtool: add ethnl_parse_bitset() helper
ethtool: set netdev features with FEATURES_SET request
ethtool: add FEATURES_NTF notification
ethtool: provide private flags with PRIVFLAGS_GET request
ethtool: set device private flags with PRIVFLAGS_SET request
ethtool: add PRIVFLAGS_NTF notification
ethtool: provide ring sizes with RINGS_GET request
ethtool: set device ring sizes with RINGS_SET request
ethtool: add RINGS_NTF notification
ethtool: provide channel counts with CHANNELS_GET request
ethtool: set device channel counts with CHANNELS_SET request
ethtool: add CHANNELS_NTF notification
Documentation/networking/ethtool-netlink.rst | 272 +++++++++++++++--
include/uapi/linux/ethtool_netlink.h | 82 +++++
net/ethtool/Makefile | 3 +-
net/ethtool/bitset.c | 94 ++++++
net/ethtool/bitset.h | 4 +
net/ethtool/channels.c | 227 ++++++++++++++
net/ethtool/common.c | 31 ++
net/ethtool/common.h | 3 +
net/ethtool/debug.c | 6 +-
net/ethtool/features.c | 304 +++++++++++++++++++
net/ethtool/ioctl.c | 52 +---
net/ethtool/linkinfo.c | 6 +-
net/ethtool/linkmodes.c | 6 +-
net/ethtool/netlink.c | 99 +++++-
net/ethtool/netlink.h | 15 +-
net/ethtool/privflags.c | 209 +++++++++++++
net/ethtool/rings.c | 200 ++++++++++++
net/ethtool/wol.c | 5 +-
18 files changed, 1538 insertions(+), 80 deletions(-)
create mode 100644 net/ethtool/channels.c
create mode 100644 net/ethtool/features.c
create mode 100644 net/ethtool/privflags.c
create mode 100644 net/ethtool/rings.c
--
2.25.1
Implement FEATURES_GET request to get network device features. These are
traditionally available via ETHTOOL_GFEATURES ioctl request.
v2:
- style cleanup suggested by Jakub Kicinski
Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 51 ++++++--
include/uapi/linux/ethtool_netlink.h | 17 +++
net/ethtool/Makefile | 2 +-
net/ethtool/common.h | 2 +
net/ethtool/features.c | 131 +++++++++++++++++++
net/ethtool/ioctl.c | 2 -
net/ethtool/netlink.c | 8 ++
net/ethtool/netlink.h | 1 +
8 files changed, 202 insertions(+), 12 deletions(-)
create mode 100644 net/ethtool/features.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index f1f868479ceb..5713abf98534 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -189,6 +189,7 @@ Userspace to kernel:
``ETHTOOL_MSG_DEBUG_SET`` set debugging settings
``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
+ ``ETHTOOL_MSG_FEATURES_GET`` get device features
===================================== ================================
Kernel to userspace:
@@ -204,6 +205,7 @@ Kernel to userspace:
``ETHTOOL_MSG_DEBUG_NTF`` debugging settings notification
``ETHTOOL_MSG_WOL_GET_REPLY`` wake-on-lan settings
``ETHTOOL_MSG_WOL_NTF`` wake-on-lan settings notification
+ ``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -521,6 +523,37 @@ Request contents:
``WAKE_MAGICSECURE`` mode.
+FEATURES_GET
+============
+
+Gets netdev features like ``ETHTOOL_GFEATURES`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested reply header
+ ``ETHTOOL_A_FEATURES_HW`` bitset dev->hw_features
+ ``ETHTOOL_A_FEATURES_WANTED`` bitset dev->wanted_features
+ ``ETHTOOL_A_FEATURES_ACTIVE`` bitset dev->features
+ ``ETHTOOL_A_FEATURES_NOCHANGE`` bitset NETIF_F_NEVER_CHANGE
+ ==================================== ====== ==========================
+
+Bitmaps in kernel response have the same meaning as bitmaps used in ioctl
+interference but attribute names are different (they are based on
+corresponding members of struct net_device). Legacy "flags" are not provided,
+if userspace needs them (most likely only ethtool for backward compatibility),
+it can calculate their values from related feature bits itself.
+ETHA_FEATURES_HW uses mask consisting of all features recognized by kernel (to
+provide all names when using verbose bitmap format), the other three use no
+mask (simple bit lists).
+
+
Request translation
===================
@@ -551,30 +584,30 @@ have their netlink replacement yet.
``ETHTOOL_SRINGPARAM`` n/a
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
- ``ETHTOOL_GRXCSUM`` n/a
+ ``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SRXCSUM`` n/a
- ``ETHTOOL_GTXCSUM`` n/a
+ ``ETHTOOL_GTXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_STXCSUM`` n/a
- ``ETHTOOL_GSG`` n/a
+ ``ETHTOOL_GSG`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SSG`` n/a
``ETHTOOL_TEST`` n/a
``ETHTOOL_GSTRINGS`` ``ETHTOOL_MSG_STRSET_GET``
``ETHTOOL_PHYS_ID`` n/a
``ETHTOOL_GSTATS`` n/a
- ``ETHTOOL_GTSO`` n/a
+ ``ETHTOOL_GTSO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_STSO`` n/a
``ETHTOOL_GPERMADDR`` rtnetlink ``RTM_GETLINK``
- ``ETHTOOL_GUFO`` n/a
+ ``ETHTOOL_GUFO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SUFO`` n/a
- ``ETHTOOL_GGSO`` n/a
+ ``ETHTOOL_GGSO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SGSO`` n/a
- ``ETHTOOL_GFLAGS`` n/a
+ ``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFLAGS`` n/a
``ETHTOOL_GPFLAGS`` n/a
``ETHTOOL_SPFLAGS`` n/a
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
- ``ETHTOOL_GGRO`` n/a
+ ``ETHTOOL_GGRO`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SGRO`` n/a
``ETHTOOL_GRXRINGS`` n/a
``ETHTOOL_GRXCLSRLCNT`` n/a
@@ -589,7 +622,7 @@ have their netlink replacement yet.
``ETHTOOL_GSSET_INFO`` ``ETHTOOL_MSG_STRSET_GET``
``ETHTOOL_GRXFHINDIR`` n/a
``ETHTOOL_SRXFHINDIR`` n/a
- ``ETHTOOL_GFEATURES`` n/a
+ ``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFEATURES`` n/a
``ETHTOOL_GCHANNELS`` n/a
``ETHTOOL_SCHANNELS`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 7e0b460f872c..d0cc7a0334c8 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -24,6 +24,7 @@ enum {
ETHTOOL_MSG_DEBUG_SET,
ETHTOOL_MSG_WOL_GET,
ETHTOOL_MSG_WOL_SET,
+ ETHTOOL_MSG_FEATURES_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -43,6 +44,7 @@ enum {
ETHTOOL_MSG_DEBUG_NTF,
ETHTOOL_MSG_WOL_GET_REPLY,
ETHTOOL_MSG_WOL_NTF,
+ ETHTOOL_MSG_FEATURES_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -228,6 +230,21 @@ enum {
ETHTOOL_A_WOL_MAX = __ETHTOOL_A_WOL_CNT - 1
};
+/* FEATURES */
+
+enum {
+ ETHTOOL_A_FEATURES_UNSPEC,
+ ETHTOOL_A_FEATURES_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_FEATURES_HW, /* bitset */
+ ETHTOOL_A_FEATURES_WANTED, /* bitset */
+ ETHTOOL_A_FEATURES_ACTIVE, /* bitset */
+ ETHTOOL_A_FEATURES_NOCHANGE, /* bitset */
+
+ /* add new constants above here */
+ __ETHTOOL_A_FEATURES_CNT,
+ ETHTOOL_A_FEATURES_MAX = __ETHTOOL_A_FEATURES_CNT - 1
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 424545a4aaec..5be8c9ab26d1 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -5,4 +5,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
- linkstate.o debug.o wol.o
+ linkstate.o debug.o wol.o features.o
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 40ba74e0b9bb..7dc1163800a7 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -6,6 +6,8 @@
#include <linux/netdevice.h>
#include <linux/ethtool.h>
+#define ETHTOOL_DEV_FEATURE_WORDS DIV_ROUND_UP(NETDEV_FEATURE_COUNT, 32)
+
/* compose link mode index from speed, type and duplex */
#define ETHTOOL_LINK_MODE(speed, type, duplex) \
ETHTOOL_LINK_MODE_ ## speed ## base ## type ## _ ## duplex ## _BIT
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
new file mode 100644
index 000000000000..a0cc2b969053
--- /dev/null
+++ b/net/ethtool/features.c
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct features_req_info {
+ struct ethnl_req_info base;
+};
+
+struct features_reply_data {
+ struct ethnl_reply_data base;
+ u32 hw[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 wanted[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 active[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 nochange[ETHTOOL_DEV_FEATURE_WORDS];
+ u32 all[ETHTOOL_DEV_FEATURE_WORDS];
+};
+
+#define FEATURES_REPDATA(__reply_base) \
+ container_of(__reply_base, struct features_reply_data, base)
+
+static const struct nla_policy
+features_get_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
+ [ETHTOOL_A_FEATURES_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_FEATURES_HW] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_WANTED] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_ACTIVE] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_NOCHANGE] = { .type = NLA_REJECT },
+};
+
+static void ethnl_features_to_bitmap32(u32 *dest, netdev_features_t src)
+{
+ unsigned int i;
+
+ for (i = 0; i < ETHTOOL_DEV_FEATURE_WORDS; i++)
+ dest[i] = src >> (32 * i);
+}
+
+static int features_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ netdev_features_t all_features;
+
+ ethnl_features_to_bitmap32(data->hw, dev->hw_features);
+ ethnl_features_to_bitmap32(data->wanted, dev->wanted_features);
+ ethnl_features_to_bitmap32(data->active, dev->features);
+ ethnl_features_to_bitmap32(data->nochange, NETIF_F_NEVER_CHANGE);
+ all_features = GENMASK_ULL(NETDEV_FEATURE_COUNT - 1, 0);
+ ethnl_features_to_bitmap32(data->all, all_features);
+
+ return 0;
+}
+
+static int features_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ unsigned int len = 0;
+ int ret;
+
+ ret = ethnl_bitset32_size(data->hw, data->all, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->wanted, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->active, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+ ret = ethnl_bitset32_size(data->nochange, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ len += ret;
+
+ return len;
+}
+
+static int features_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct features_reply_data *data = FEATURES_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ int ret;
+
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_HW, data->hw,
+ data->all, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_WANTED, data->wanted,
+ NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_ACTIVE, data->active,
+ NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ return ret;
+ return ethnl_put_bitset32(skb, ETHTOOL_A_FEATURES_NOCHANGE,
+ data->nochange, NULL, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+}
+
+const struct ethnl_request_ops ethnl_features_request_ops = {
+ .request_cmd = ETHTOOL_MSG_FEATURES_GET,
+ .reply_cmd = ETHTOOL_MSG_FEATURES_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_FEATURES_HEADER,
+ .max_attr = ETHTOOL_A_FEATURES_MAX,
+ .req_info_size = sizeof(struct features_req_info),
+ .reply_data_size = sizeof(struct features_reply_data),
+ .request_policy = features_get_policy,
+
+ .prepare_data = features_prepare_data,
+ .reply_size = features_reply_size,
+ .fill_reply = features_fill_reply,
+};
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index ae97c82c7052..45d1bf1764b7 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -56,8 +56,6 @@ EXPORT_SYMBOL(ethtool_op_get_ts_info);
/* Handlers for each ethtool command */
-#define ETHTOOL_DEV_FEATURE_WORDS ((NETDEV_FEATURE_COUNT + 31) / 32)
-
static int ethtool_get_features(struct net_device *dev, void __user *useraddr)
{
struct ethtool_gfeatures cmd = {
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 8eca55122ef3..e451a75e9577 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -215,6 +215,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_LINKSTATE_GET] = ðnl_linkstate_request_ops,
[ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
[ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
+ [ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -695,6 +696,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_wol,
},
+ {
+ .cmd = ETHTOOL_MSG_FEATURES_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 961708290074..be2325ea8493 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -337,6 +337,7 @@ extern const struct ethnl_request_ops ethnl_linkmodes_request_ops;
extern const struct ethnl_request_ops ethnl_linkstate_request_ops;
extern const struct ethnl_request_ops ethnl_debug_request_ops;
extern const struct ethnl_request_ops ethnl_wol_request_ops;
+extern const struct ethnl_request_ops ethnl_features_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
--
2.25.1
Unlike other SET type commands, modifying netdev features is required to
provide a reply telling userspace what was actually changed, compared to
what was requested. For that purpose, the "modified" flag provided by
ethnl_update_bitset() is not sufficient, we need full information which
bits were requested to change.
Therefore provide ethnl_parse_bitset() returning effective value and mask
bitmaps equivalent to the contents of a bitset nested attribute.
v2: use non-atomic __set_bit() (suggested by David Miller)
Signed-off-by: Michal Kubecek <[email protected]>
---
net/ethtool/bitset.c | 94 ++++++++++++++++++++++++++++++++++++++++++++
net/ethtool/bitset.h | 4 ++
2 files changed, 98 insertions(+)
diff --git a/net/ethtool/bitset.c b/net/ethtool/bitset.c
index ef9197541cb3..dae7402eaca3 100644
--- a/net/ethtool/bitset.c
+++ b/net/ethtool/bitset.c
@@ -588,6 +588,100 @@ int ethnl_update_bitset32(u32 *bitmap, unsigned int nbits,
return 0;
}
+/**
+ * ethnl_parse_bitset() - Compute effective value and mask from bitset nest
+ * @val: unsigned long based bitmap to put value into
+ * @mask: unsigned long based bitmap to put mask into
+ * @nbits: size of @val and @mask bitmaps
+ * @attr: nest attribute to parse and apply
+ * @names: array of bit names; may be null for compact format
+ * @extack: extack for error reporting
+ *
+ * Provide @nbits size long bitmaps for value and mask so that
+ * x = (val & mask) | (x & ~mask) would modify any @nbits sized bitmap x
+ * the same way ethnl_update_bitset() with the same bitset attribute would.
+ *
+ * Return: negative error code on failure, 0 on success
+ */
+int ethnl_parse_bitset(unsigned long *val, unsigned long *mask,
+ unsigned int nbits, const struct nlattr *attr,
+ ethnl_string_array_t names,
+ struct netlink_ext_ack *extack)
+{
+ struct nlattr *tb[ETHTOOL_A_BITSET_MAX + 1];
+ const struct nlattr *bit_attr;
+ bool no_mask;
+ int rem;
+ int ret;
+
+ if (!attr)
+ return 0;
+ ret = nla_parse_nested(tb, ETHTOOL_A_BITSET_MAX, attr, bitset_policy,
+ extack);
+ if (ret < 0)
+ return ret;
+ no_mask = tb[ETHTOOL_A_BITSET_NOMASK];
+
+ if (!tb[ETHTOOL_A_BITSET_BITS]) {
+ unsigned int change_bits;
+
+ ret = ethnl_compact_sanity_checks(nbits, attr, tb, extack);
+ if (ret < 0)
+ return ret;
+
+ change_bits = nla_get_u32(tb[ETHTOOL_A_BITSET_SIZE]);
+ bitmap_from_arr32(val, nla_data(tb[ETHTOOL_A_BITSET_VALUE]),
+ change_bits);
+ if (change_bits < nbits)
+ bitmap_clear(val, change_bits, nbits - change_bits);
+ if (no_mask) {
+ bitmap_fill(mask, nbits);
+ } else {
+ bitmap_from_arr32(mask,
+ nla_data(tb[ETHTOOL_A_BITSET_MASK]),
+ change_bits);
+ if (change_bits < nbits)
+ bitmap_clear(mask, change_bits,
+ nbits - change_bits);
+ }
+
+ return 0;
+ }
+
+ if (tb[ETHTOOL_A_BITSET_VALUE]) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_BITSET_VALUE],
+ "value only allowed in compact bitset");
+ return -EINVAL;
+ }
+ if (tb[ETHTOOL_A_BITSET_MASK]) {
+ NL_SET_ERR_MSG_ATTR(extack, tb[ETHTOOL_A_BITSET_MASK],
+ "mask only allowed in compact bitset");
+ return -EINVAL;
+ }
+
+ bitmap_zero(val, nbits);
+ if (no_mask)
+ bitmap_fill(mask, nbits);
+ else
+ bitmap_zero(mask, nbits);
+
+ nla_for_each_nested(bit_attr, tb[ETHTOOL_A_BITSET_BITS], rem) {
+ unsigned int idx;
+ bool bit_val;
+
+ ret = ethnl_parse_bit(&idx, &bit_val, nbits, bit_attr, no_mask,
+ names, extack);
+ if (ret < 0)
+ return ret;
+ if (bit_val)
+ __set_bit(idx, val);
+ if (!no_mask)
+ __set_bit(idx, mask);
+ }
+
+ return 0;
+}
+
#if BITS_PER_LONG == 64 && defined(__BIG_ENDIAN)
/* 64-bit big endian architectures are the only case when u32 based bitmaps
diff --git a/net/ethtool/bitset.h b/net/ethtool/bitset.h
index b849f9d19676..c2c2e0051d00 100644
--- a/net/ethtool/bitset.h
+++ b/net/ethtool/bitset.h
@@ -26,5 +26,9 @@ int ethnl_update_bitset(unsigned long *bitmap, unsigned int nbits,
int ethnl_update_bitset32(u32 *bitmap, unsigned int nbits,
const struct nlattr *attr, ethnl_string_array_t names,
struct netlink_ext_ack *extack, bool *mod);
+int ethnl_parse_bitset(unsigned long *val, unsigned long *mask,
+ unsigned int nbits, const struct nlattr *attr,
+ ethnl_string_array_t names,
+ struct netlink_ext_ack *extack);
#endif /* _NET_ETHTOOL_BITSET_H */
--
2.25.1
Implement FEATURES_SET netlink request to set network device features.
These are traditionally set using ETHTOOL_SFEATURES ioctl request.
Actual change is subject to netdev_change_features() sanity checks so that
it can differ from what was requested. Unlike with most other SET requests,
in addition to error code and optional extack, kernel provides an optional
reply message (ETHTOOL_MSG_FEATURES_SET_REPLY) in the same format but with
different semantics: information about difference between user request and
actual result and difference between old and new state of dev->features.
This reply message can be suppressed by setting ETHTOOL_FLAG_OMIT_REPLY
flag in request header.
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 56 +++++-
include/uapi/linux/ethtool_netlink.h | 2 +
net/ethtool/features.c | 169 +++++++++++++++++++
net/ethtool/netlink.c | 5 +
net/ethtool/netlink.h | 1 +
5 files changed, 224 insertions(+), 9 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 5713abf98534..d6706c4aa972 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -190,6 +190,7 @@ Userspace to kernel:
``ETHTOOL_MSG_WOL_GET`` get wake-on-lan settings
``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
``ETHTOOL_MSG_FEATURES_GET`` get device features
+ ``ETHTOOL_MSG_FEATURES_SET`` set device features
===================================== ================================
Kernel to userspace:
@@ -206,6 +207,7 @@ Kernel to userspace:
``ETHTOOL_MSG_WOL_GET_REPLY`` wake-on-lan settings
``ETHTOOL_MSG_WOL_NTF`` wake-on-lan settings notification
``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
+ ``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -554,6 +556,42 @@ provide all names when using verbose bitmap format), the other three use no
mask (simple bit lists).
+FEATURES_SET
+============
+
+Request to set netdev features like ``ETHTOOL_SFEATURES`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested request header
+ ``ETHTOOL_A_FEATURES_WANTED`` bitset requested features
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_FEATURES_HEADER`` nested reply header
+ ``ETHTOOL_A_FEATURES_WANTED`` bitset diff wanted vs. result
+ ``ETHTOOL_A_FEATURES_ACTIVE`` bitset diff old vs. new active
+ ==================================== ====== ==========================
+
+Request constains only one bitset which can be either value/mask pair (request
+to change specific feature bits and leave the rest) or only a value (request
+to set all features to specified set).
+
+As request is subject to netdev_change_features() sanity checks, optional
+kernel reply (can be suppressed by ``ETHTOOL_FLAG_OMIT_REPLY`` flag in request
+header) informs client about the actual result. ``ETHTOOL_A_FEATURES_WANTED``
+reports the difference between client request and actual result: mask consists
+of bits which differ between requested features and result (dev->features
+after the operation), value consists of values of these bits in the request
+(i.e. negated values from resulting features). ``ETHTOOL_A_FEATURES_ACTIVE``
+reports the difference between old and new dev->features: mask consists of
+bits which have changed, values are their values in new dev->features (after
+the operation).
+
+
Request translation
===================
@@ -585,30 +623,30 @@ have their netlink replacement yet.
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SRXCSUM`` n/a
+ ``ETHTOOL_SRXCSUM`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GTXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_STXCSUM`` n/a
+ ``ETHTOOL_STXCSUM`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GSG`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SSG`` n/a
+ ``ETHTOOL_SSG`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_TEST`` n/a
``ETHTOOL_GSTRINGS`` ``ETHTOOL_MSG_STRSET_GET``
``ETHTOOL_PHYS_ID`` n/a
``ETHTOOL_GSTATS`` n/a
``ETHTOOL_GTSO`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_STSO`` n/a
+ ``ETHTOOL_STSO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GPERMADDR`` rtnetlink ``RTM_GETLINK``
``ETHTOOL_GUFO`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SUFO`` n/a
+ ``ETHTOOL_SUFO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GGSO`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SGSO`` n/a
+ ``ETHTOOL_SGSO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SFLAGS`` n/a
+ ``ETHTOOL_SFLAGS`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GPFLAGS`` n/a
``ETHTOOL_SPFLAGS`` n/a
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
``ETHTOOL_GGRO`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SGRO`` n/a
+ ``ETHTOOL_SGRO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GRXRINGS`` n/a
``ETHTOOL_GRXCLSRLCNT`` n/a
``ETHTOOL_GRXCLSRULE`` n/a
@@ -623,7 +661,7 @@ have their netlink replacement yet.
``ETHTOOL_GRXFHINDIR`` n/a
``ETHTOOL_SRXFHINDIR`` n/a
``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
- ``ETHTOOL_SFEATURES`` n/a
+ ``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GCHANNELS`` n/a
``ETHTOOL_SCHANNELS`` n/a
``ETHTOOL_SET_DUMP`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index d0cc7a0334c8..6f7aaa6b7f42 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -25,6 +25,7 @@ enum {
ETHTOOL_MSG_WOL_GET,
ETHTOOL_MSG_WOL_SET,
ETHTOOL_MSG_FEATURES_GET,
+ ETHTOOL_MSG_FEATURES_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -45,6 +46,7 @@ enum {
ETHTOOL_MSG_WOL_GET_REPLY,
ETHTOOL_MSG_WOL_NTF,
ETHTOOL_MSG_FEATURES_GET_REPLY,
+ ETHTOOL_MSG_FEATURES_SET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index a0cc2b969053..4ac1e05684ce 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -129,3 +129,172 @@ const struct ethnl_request_ops ethnl_features_request_ops = {
.reply_size = features_reply_size,
.fill_reply = features_fill_reply,
};
+
+/* FEATURES_SET */
+
+static const struct nla_policy
+features_set_policy[ETHTOOL_A_FEATURES_MAX + 1] = {
+ [ETHTOOL_A_FEATURES_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_FEATURES_HW] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_WANTED] = { .type = NLA_NESTED },
+ [ETHTOOL_A_FEATURES_ACTIVE] = { .type = NLA_REJECT },
+ [ETHTOOL_A_FEATURES_NOCHANGE] = { .type = NLA_REJECT },
+};
+
+static void ethnl_features_to_bitmap(unsigned long *dest, netdev_features_t val)
+{
+ const unsigned int words = BITS_TO_LONGS(NETDEV_FEATURE_COUNT);
+ unsigned int i;
+
+ bitmap_zero(dest, NETDEV_FEATURE_COUNT);
+ for (i = 0; i < words; i++)
+ dest[i] = (unsigned long)(val >> (i * BITS_PER_LONG));
+}
+
+static netdev_features_t ethnl_bitmap_to_features(unsigned long *src)
+{
+ const unsigned int nft_bits = sizeof(netdev_features_t) * BITS_PER_BYTE;
+ const unsigned int words = BITS_TO_LONGS(NETDEV_FEATURE_COUNT);
+ netdev_features_t ret = 0;
+ unsigned int i;
+
+ for (i = 0; i < words; i++)
+ ret |= (netdev_features_t)(src[i]) << (i * BITS_PER_LONG);
+ ret &= ~(netdev_features_t)0 >> (nft_bits - NETDEV_FEATURE_COUNT);
+ return ret;
+}
+
+static int features_send_reply(struct net_device *dev, struct genl_info *info,
+ const unsigned long *wanted,
+ const unsigned long *wanted_mask,
+ const unsigned long *active,
+ const unsigned long *active_mask, bool compact)
+{
+ struct sk_buff *rskb;
+ void *reply_payload;
+ int reply_len = 0;
+ int ret;
+
+ reply_len = ethnl_reply_header_size();
+ ret = ethnl_bitset_size(wanted, wanted_mask, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ goto err;
+ reply_len += ret;
+ ret = ethnl_bitset_size(active, active_mask, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ goto err;
+ reply_len += ret;
+
+ ret = -ENOMEM;
+ rskb = ethnl_reply_init(reply_len, dev, ETHTOOL_MSG_FEATURES_SET_REPLY,
+ ETHTOOL_A_FEATURES_HEADER, info,
+ &reply_payload);
+ if (!rskb)
+ goto err;
+
+ ret = ethnl_put_bitset(rskb, ETHTOOL_A_FEATURES_WANTED, wanted,
+ wanted_mask, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ goto nla_put_failure;
+ ret = ethnl_put_bitset(rskb, ETHTOOL_A_FEATURES_ACTIVE, active,
+ active_mask, NETDEV_FEATURE_COUNT,
+ netdev_features_strings, compact);
+ if (ret < 0)
+ goto nla_put_failure;
+
+ genlmsg_end(rskb, reply_payload);
+ ret = genlmsg_reply(rskb, info);
+ return ret;
+
+nla_put_failure:
+ nlmsg_free(rskb);
+ WARN_ONCE(1, "calculated message payload length (%d) not sufficient\n",
+ reply_len);
+err:
+ GENL_SET_ERR_MSG(info, "failed to send reply message");
+ return ret;
+}
+
+int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
+{
+ DECLARE_BITMAP(wanted_diff_mask, NETDEV_FEATURE_COUNT);
+ DECLARE_BITMAP(active_diff_mask, NETDEV_FEATURE_COUNT);
+ DECLARE_BITMAP(old_active, NETDEV_FEATURE_COUNT);
+ DECLARE_BITMAP(new_active, NETDEV_FEATURE_COUNT);
+ DECLARE_BITMAP(req_wanted, NETDEV_FEATURE_COUNT);
+ DECLARE_BITMAP(req_mask, NETDEV_FEATURE_COUNT);
+ struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
+ struct ethnl_req_info req_info = {};
+ struct net_device *dev;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_FEATURES_MAX, features_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ if (!tb[ETHTOOL_A_FEATURES_WANTED])
+ return -EINVAL;
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_FEATURES_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+
+ rtnl_lock();
+ ethnl_features_to_bitmap(old_active, dev->features);
+ ret = ethnl_parse_bitset(req_wanted, req_mask, NETDEV_FEATURE_COUNT,
+ tb[ETHTOOL_A_FEATURES_WANTED],
+ netdev_features_strings, info->extack);
+ if (ret < 0)
+ goto out_rtnl;
+ if (ethnl_bitmap_to_features(req_mask) & ~NETIF_F_ETHTOOL_BITS) {
+ GENL_SET_ERR_MSG(info, "attempt to change non-ethtool features");
+ ret = -EINVAL;
+ goto out_rtnl;
+ }
+
+ /* set req_wanted bits not in req_mask from old_active */
+ bitmap_and(req_wanted, req_wanted, req_mask, NETDEV_FEATURE_COUNT);
+ bitmap_andnot(new_active, old_active, req_mask, NETDEV_FEATURE_COUNT);
+ bitmap_or(req_wanted, new_active, req_wanted, NETDEV_FEATURE_COUNT);
+ if (bitmap_equal(req_wanted, old_active, NETDEV_FEATURE_COUNT)) {
+ ret = 0;
+ goto out_rtnl;
+ }
+
+ dev->wanted_features = ethnl_bitmap_to_features(req_wanted);
+ __netdev_update_features(dev);
+ ethnl_features_to_bitmap(new_active, dev->features);
+
+ ret = 0;
+ if (!(req_info.flags & ETHTOOL_FLAG_OMIT_REPLY)) {
+ bool compact = req_info.flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+
+ bitmap_xor(wanted_diff_mask, req_wanted, new_active,
+ NETDEV_FEATURE_COUNT);
+ bitmap_xor(active_diff_mask, old_active, new_active,
+ NETDEV_FEATURE_COUNT);
+ bitmap_and(wanted_diff_mask, wanted_diff_mask, req_mask,
+ NETDEV_FEATURE_COUNT);
+ bitmap_and(req_wanted, req_wanted, wanted_diff_mask,
+ NETDEV_FEATURE_COUNT);
+ bitmap_and(new_active, new_active, active_diff_mask,
+ NETDEV_FEATURE_COUNT);
+
+ ret = features_send_reply(dev, info, req_wanted,
+ wanted_diff_mask, new_active,
+ active_diff_mask, compact);
+ }
+
+out_rtnl:
+ rtnl_unlock();
+ dev_put(dev);
+ return ret;
+}
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index e451a75e9577..757ea3fc98a0 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -703,6 +703,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_FEATURES_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_set_features,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index be2325ea8493..135836201e89 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -343,5 +343,6 @@ int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
+int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.25.1
Send ETHTOOL_MSG_PRIVFLAGS_NTF notification whenever private flags of
a network device are modified using ETHTOOL_MSG_PRIVFLAGS_SET netlink
message or ETHTOOL_SPFLAGS ioctl request.
Signed-off-by: Michal Kubecek <[email protected]>
---
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/ioctl.c | 2 ++
net/ethtool/netlink.c | 2 ++
net/ethtool/privflags.c | 3 +++
4 files changed, 8 insertions(+)
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 13e631c86825..7f23a7f0fca1 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -51,6 +51,7 @@ enum {
ETHTOOL_MSG_FEATURES_SET_REPLY,
ETHTOOL_MSG_FEATURES_NTF,
ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
+ ETHTOOL_MSG_PRIVFLAGS_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 45d1bf1764b7..298822289496 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -2716,6 +2716,8 @@ int dev_ethtool(struct net *net, struct ifreq *ifr)
case ETHTOOL_GPFLAGS:
rc = ethtool_get_value(dev, useraddr, ethcmd,
dev->ethtool_ops->get_priv_flags);
+ if (!rc)
+ ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
break;
case ETHTOOL_SPFLAGS:
rc = ethtool_set_value(dev, useraddr,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index b6795aad7ccb..dec82b0b80bd 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -530,6 +530,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops,
[ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
[ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
+ [ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
};
/* default notification handler */
@@ -616,6 +617,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
+ [ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
};
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index dfa76d552277..e8f03b33db9b 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -194,6 +194,9 @@ int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
if (ret < 0 || !mod)
goto out_free;
ret = ops->set_priv_flags(dev, flags);
+ if (ret < 0)
+ goto out_free;
+ ethtool_notify(dev, ETHTOOL_MSG_PRIVFLAGS_NTF, NULL);
out_free:
kfree(names);
--
2.25.1
Implement RINGS_GET request to get ring sizes of a network device. These
are traditionally available via ETHTOOL_GRINGPARAM ioctl request.
Omit attributes for ring types which are not supported by driver or device
(zero reported for maximum).
v2: (all suggested by Jakub Kicinski)
- minor cleanup in rings_prepare_data()
- more descriptive rings_reply_size()
- omit attributes with zero max size
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 30 +++++-
include/uapi/linux/ethtool_netlink.h | 21 ++++
net/ethtool/Makefile | 2 +-
net/ethtool/netlink.c | 8 ++
net/ethtool/netlink.h | 1 +
net/ethtool/rings.c | 108 +++++++++++++++++++
6 files changed, 168 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/rings.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index e553112fa2d7..798c2f97d89b 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -193,6 +193,7 @@ Userspace to kernel:
``ETHTOOL_MSG_FEATURES_SET`` set device features
``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
+ ``ETHTOOL_MSG_RINGS_GET`` get ring sizes
===================================== ================================
Kernel to userspace:
@@ -213,6 +214,7 @@ Kernel to userspace:
``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
+ ``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -645,6 +647,32 @@ Request contents:
modify only values of some of them.
+RINGS_GET
+=========
+
+Gets ring sizes like ``ETHTOOL_GRINGPARAM`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_RINGS_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_RINGS_HEADER`` nested reply header
+ ``ETHTOOL_A_RINGS_RX_MAX`` u32 max size of RX ring
+ ``ETHTOOL_A_RINGS_RX_MINI_MAX`` u32 max size of RX mini ring
+ ``ETHTOOL_A_RINGS_RX_JUMBO_MAX`` u32 max size of RX jumbo ring
+ ``ETHTOOL_A_RINGS_TX_MAX`` u32 max size of TX ring
+ ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring
+ ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
+ ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
+ ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ==================================== ====== ==========================
+
+
Request translation
===================
@@ -671,7 +699,7 @@ have their netlink replacement yet.
``ETHTOOL_SEEPROM`` n/a
``ETHTOOL_GCOALESCE`` n/a
``ETHTOOL_SCOALESCE`` n/a
- ``ETHTOOL_GRINGPARAM`` n/a
+ ``ETHTOOL_GRINGPARAM`` ``ETHTOOL_MSG_RINGS_GET``
``ETHTOOL_SRINGPARAM`` n/a
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 7f23a7f0fca1..7cd220f8cf73 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -28,6 +28,7 @@ enum {
ETHTOOL_MSG_FEATURES_SET,
ETHTOOL_MSG_PRIVFLAGS_GET,
ETHTOOL_MSG_PRIVFLAGS_SET,
+ ETHTOOL_MSG_RINGS_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -52,6 +53,7 @@ enum {
ETHTOOL_MSG_FEATURES_NTF,
ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
ETHTOOL_MSG_PRIVFLAGS_NTF,
+ ETHTOOL_MSG_RINGS_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -264,6 +266,25 @@ enum {
ETHTOOL_A_PRIVFLAGS_MAX = __ETHTOOL_A_PRIVFLAGS_CNT - 1
};
+/* RINGS */
+
+enum {
+ ETHTOOL_A_RINGS_UNSPEC,
+ ETHTOOL_A_RINGS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_RINGS_RX_MAX, /* u32 */
+ ETHTOOL_A_RINGS_RX_MINI_MAX, /* u32 */
+ ETHTOOL_A_RINGS_RX_JUMBO_MAX, /* u32 */
+ ETHTOOL_A_RINGS_TX_MAX, /* u32 */
+ ETHTOOL_A_RINGS_RX, /* u32 */
+ ETHTOOL_A_RINGS_RX_MINI, /* u32 */
+ ETHTOOL_A_RINGS_RX_JUMBO, /* u32 */
+ ETHTOOL_A_RINGS_TX, /* u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_RINGS_CNT,
+ ETHTOOL_A_RINGS_MAX = (__ETHTOOL_A_RINGS_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 58708bcc2968..b48b70ef4ed0 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -5,4 +5,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
- linkstate.o debug.o wol.o features.o privflags.o
+ linkstate.o debug.o wol.o features.o privflags.o rings.o
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index dec82b0b80bd..0dc25a490450 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -217,6 +217,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
[ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
[ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
+ [ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -748,6 +749,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_privflags,
},
+ {
+ .cmd = ETHTOOL_MSG_RINGS_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index ca789f587ef3..01761932ed15 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -339,6 +339,7 @@ extern const struct ethnl_request_ops ethnl_debug_request_ops;
extern const struct ethnl_request_ops ethnl_wol_request_ops;
extern const struct ethnl_request_ops ethnl_features_request_ops;
extern const struct ethnl_request_ops ethnl_privflags_request_ops;
+extern const struct ethnl_request_ops ethnl_rings_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
new file mode 100644
index 000000000000..d3129d8a252d
--- /dev/null
+++ b/net/ethtool/rings.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct rings_req_info {
+ struct ethnl_req_info base;
+};
+
+struct rings_reply_data {
+ struct ethnl_reply_data base;
+ struct ethtool_ringparam ringparam;
+};
+
+#define RINGS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct rings_reply_data, base)
+
+static const struct nla_policy
+rings_get_policy[ETHTOOL_A_RINGS_MAX + 1] = {
+ [ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_TX] = { .type = NLA_REJECT },
+};
+
+static int rings_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct rings_reply_data *data = RINGS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_ringparam)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+ dev->ethtool_ops->get_ringparam(dev, &data->ringparam);
+ ethnl_ops_complete(dev);
+
+ return 0;
+}
+
+static int rings_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u32)) + /* _RINGS_RX_MAX */
+ nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI_MAX */
+ nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO_MAX */
+ nla_total_size(sizeof(u32)) + /* _RINGS_TX_MAX */
+ nla_total_size(sizeof(u32)) + /* _RINGS_RX */
+ nla_total_size(sizeof(u32)) + /* _RINGS_RX_MINI */
+ nla_total_size(sizeof(u32)) + /* _RINGS_RX_JUMBO */
+ nla_total_size(sizeof(u32)); /* _RINGS_TX */
+}
+
+static int rings_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct rings_reply_data *data = RINGS_REPDATA(reply_base);
+ const struct ethtool_ringparam *ringparam = &data->ringparam;
+
+ if ((ringparam->rx_max_pending &&
+ (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MAX,
+ ringparam->rx_max_pending) ||
+ nla_put_u32(skb, ETHTOOL_A_RINGS_RX,
+ ringparam->rx_pending))) ||
+ (ringparam->rx_mini_max_pending &&
+ (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI_MAX,
+ ringparam->rx_mini_max_pending) ||
+ nla_put_u32(skb, ETHTOOL_A_RINGS_RX_MINI,
+ ringparam->rx_mini_pending))) ||
+ (ringparam->rx_jumbo_max_pending &&
+ (nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO_MAX,
+ ringparam->rx_jumbo_max_pending) ||
+ nla_put_u32(skb, ETHTOOL_A_RINGS_RX_JUMBO,
+ ringparam->rx_jumbo_pending))) ||
+ (ringparam->tx_max_pending &&
+ (nla_put_u32(skb, ETHTOOL_A_RINGS_TX_MAX,
+ ringparam->tx_max_pending) ||
+ nla_put_u32(skb, ETHTOOL_A_RINGS_TX,
+ ringparam->tx_pending))))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_rings_request_ops = {
+ .request_cmd = ETHTOOL_MSG_RINGS_GET,
+ .reply_cmd = ETHTOOL_MSG_RINGS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_RINGS_HEADER,
+ .max_attr = ETHTOOL_A_RINGS_MAX,
+ .req_info_size = sizeof(struct rings_req_info),
+ .reply_data_size = sizeof(struct rings_reply_data),
+ .request_policy = rings_get_policy,
+
+ .prepare_data = rings_prepare_data,
+ .reply_size = rings_reply_size,
+ .fill_reply = rings_fill_reply,
+};
--
2.25.1
Send ETHTOOL_MSG_RINGS_NTF notification whenever ring sizes of a network
device are modified using ETHTOOL_MSG_RINGS_SET netlink message or
ETHTOOL_SRINGPARAM ioctl request.
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 1 +
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/ioctl.c | 6 +++++-
net/ethtool/netlink.c | 2 ++
net/ethtool/rings.c | 3 +++
5 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index ba31ae8f1feb..026a5fd4a08b 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -216,6 +216,7 @@ Kernel to userspace:
``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
+ ``ETHTOOL_MSG_RINGS_NTF`` ring sizes
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index ae71801b7aac..abfc8fd626da 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -55,6 +55,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
ETHTOOL_MSG_PRIVFLAGS_NTF,
ETHTOOL_MSG_RINGS_GET_REPLY,
+ ETHTOOL_MSG_RINGS_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 298822289496..1d5c1b6b81a4 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1635,6 +1635,7 @@ static int ethtool_get_ringparam(struct net_device *dev, void __user *useraddr)
static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
{
struct ethtool_ringparam ringparam, max = { .cmd = ETHTOOL_GRINGPARAM };
+ int ret;
if (!dev->ethtool_ops->set_ringparam || !dev->ethtool_ops->get_ringparam)
return -EOPNOTSUPP;
@@ -1651,7 +1652,10 @@ static int ethtool_set_ringparam(struct net_device *dev, void __user *useraddr)
ringparam.tx_pending > max.tx_max_pending)
return -EINVAL;
- return dev->ethtool_ops->set_ringparam(dev, &ringparam);
+ ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
+ if (!ret)
+ ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
+ return ret;
}
static noinline_for_stack int ethtool_get_channels(struct net_device *dev,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 6a1ac8897a7e..653e009216cd 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -532,6 +532,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
[ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
+ [ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops,
};
/* default notification handler */
@@ -619,6 +620,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
+ [ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
};
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index 93f428e9a6c2..c2ebf72be217 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -186,6 +186,9 @@ int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
}
ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
+ if (ret < 0)
+ goto out_ops;
+ ethtool_notify(dev, ETHTOOL_MSG_RINGS_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
--
2.25.1
Send ETHTOOL_MSG_FEATURES_NTF notification whenever network device features
are modified using ETHTOOL_MSG_FEATURES_SET netlink message, ethtool ioctl
request or any other way resulting in call to netdev_update_features() or
netdev_change_features()
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 6 ++++
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/features.c | 4 +++
net/ethtool/netlink.c | 29 +++++++++++++++++++-
4 files changed, 39 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index d6706c4aa972..47542f042e9d 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -208,6 +208,7 @@ Kernel to userspace:
``ETHTOOL_MSG_WOL_NTF`` wake-on-lan settings notification
``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
+ ``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -591,6 +592,11 @@ reports the difference between old and new dev->features: mask consists of
bits which have changed, values are their values in new dev->features (after
the operation).
+``ETHTOOL_MSG_FEATURES_NTF`` notification is sent not only if device features
+are modified using ``ETHTOOL_MSG_FEATURES_SET`` request or on of ethtool ioctl
+request but also each time features are modified with netdev_update_features()
+or netdev_change_features().
+
Request translation
===================
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 6f7aaa6b7f42..3d0204cf96a6 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -47,6 +47,7 @@ enum {
ETHTOOL_MSG_WOL_NTF,
ETHTOOL_MSG_FEATURES_GET_REPLY,
ETHTOOL_MSG_FEATURES_SET_REPLY,
+ ETHTOOL_MSG_FEATURES_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/features.c b/net/ethtool/features.c
index 4ac1e05684ce..4e632dc987d8 100644
--- a/net/ethtool/features.c
+++ b/net/ethtool/features.c
@@ -230,6 +230,7 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
struct nlattr *tb[ETHTOOL_A_FEATURES_MAX + 1];
struct ethnl_req_info req_info = {};
struct net_device *dev;
+ bool mod;
int ret;
ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
@@ -272,6 +273,7 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
dev->wanted_features = ethnl_bitmap_to_features(req_wanted);
__netdev_update_features(dev);
ethnl_features_to_bitmap(new_active, dev->features);
+ mod = !bitmap_equal(old_active, new_active, NETDEV_FEATURE_COUNT);
ret = 0;
if (!(req_info.flags & ETHTOOL_FLAG_OMIT_REPLY)) {
@@ -292,6 +294,8 @@ int ethnl_set_features(struct sk_buff *skb, struct genl_info *info)
wanted_diff_mask, new_active,
active_diff_mask, compact);
}
+ if (mod)
+ ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
out_rtnl:
rtnl_unlock();
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 757ea3fc98a0..5c0e361bfd66 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -528,6 +528,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_LINKMODES_NTF] = ðnl_linkmodes_request_ops,
[ETHTOOL_MSG_DEBUG_NTF] = ðnl_debug_request_ops,
[ETHTOOL_MSG_WOL_NTF] = ðnl_wol_request_ops,
+ [ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
};
/* default notification handler */
@@ -613,6 +614,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_LINKMODES_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_DEBUG_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_WOL_NTF] = ethnl_default_notify,
+ [ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
};
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
@@ -630,6 +632,29 @@ void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
}
EXPORT_SYMBOL(ethtool_notify);
+static void ethnl_notify_features(struct netdev_notifier_info *info)
+{
+ struct net_device *dev = netdev_notifier_info_to_dev(info);
+
+ ethtool_notify(dev, ETHTOOL_MSG_FEATURES_NTF, NULL);
+}
+
+static int ethnl_netdev_event(struct notifier_block *this, unsigned long event,
+ void *ptr)
+{
+ switch (event) {
+ case NETDEV_FEAT_CHANGE:
+ ethnl_notify_features(ptr);
+ break;
+ }
+
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ethnl_netdev_notifier = {
+ .notifier_call = ethnl_netdev_event,
+};
+
/* genetlink setup */
static const struct genl_ops ethtool_genl_ops[] = {
@@ -736,7 +761,9 @@ static int __init ethnl_init(void)
return ret;
ethnl_ok = true;
- return 0;
+ ret = register_netdevice_notifier(ðnl_netdev_notifier);
+ WARN(ret < 0, "ethtool: net device notifier registration failed");
+ return ret;
}
subsys_initcall(ethnl_init);
--
2.25.1
Implement CHANNELS_SET netlink request to set channel counts of a network
device. These are traditionally set with ETHTOOL_SCHANNELS ioctl request.
Like the ioctl implementation, the generic ethtool code checks if supplied
values do not exceed driver defined limits; if they do, first offending
attribute is reported using extack. Checks preventing removing channels
used for RX indirection table or zerocopy AF_XDP socket are also
implemented.
Move ethtool_get_max_rxfh_channel() helper into common.c so that it can be
used by both ioctl and netlink code.
v2:
- fix netdev reference leak in error path (found by Jakub Kicinsky)
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 23 +++-
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/channels.c | 116 +++++++++++++++++++
net/ethtool/common.c | 31 +++++
net/ethtool/common.h | 1 +
net/ethtool/ioctl.c | 31 -----
net/ethtool/netlink.c | 5 +
net/ethtool/netlink.h | 1 +
8 files changed, 177 insertions(+), 32 deletions(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index decbbddfd8be..7df7476cf310 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -196,6 +196,7 @@ Userspace to kernel:
``ETHTOOL_MSG_RINGS_GET`` get ring sizes
``ETHTOOL_MSG_RINGS_SET`` set ring sizes
``ETHTOOL_MSG_CHANNELS_GET`` get channel counts
+ ``ETHTOOL_MSG_CHANNELS_SET`` set channel counts
===================================== ================================
Kernel to userspace:
@@ -723,6 +724,26 @@ Kernel response contents:
===================================== ====== ==========================
+CHANNELS_SET
+============
+
+Sets channel counts like ``ETHTOOL_SCHANNELS`` ioctl request.
+
+Request contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_CHANNELS_HEADER`` nested request header
+ ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count
+ ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count
+ ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count
+ ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count
+ ===================================== ====== ==========================
+
+Kernel checks that requested channel counts do not exceed limits reported by
+driver. Driver may impose additional constraints and may not suspport all
+attributes.
+
+
Request translation
===================
@@ -794,7 +815,7 @@ have their netlink replacement yet.
``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GCHANNELS`` ``ETHTOOL_MSG_CHANNELS_GET``
- ``ETHTOOL_SCHANNELS`` n/a
+ ``ETHTOOL_SCHANNELS`` ``ETHTOOL_MSG_CHANNELS_SET``
``ETHTOOL_SET_DUMP`` n/a
``ETHTOOL_GET_DUMP_FLAG`` n/a
``ETHTOOL_GET_DUMP_DATA`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 2270eb115eca..f1384a8f3534 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -31,6 +31,7 @@ enum {
ETHTOOL_MSG_RINGS_GET,
ETHTOOL_MSG_RINGS_SET,
ETHTOOL_MSG_CHANNELS_GET,
+ ETHTOOL_MSG_CHANNELS_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index 500dd5ad250b..ee232c11acae 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -1,5 +1,7 @@
// SPDX-License-Identifier: GPL-2.0-only
+#include <net/xdp_sock.h>
+
#include "netlink.h"
#include "common.h"
@@ -106,3 +108,117 @@ const struct ethnl_request_ops ethnl_channels_request_ops = {
.reply_size = channels_reply_size,
.fill_reply = channels_fill_reply,
};
+
+/* CHANNELS_SET */
+
+static const struct nla_policy
+channels_set_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
+ [ETHTOOL_A_CHANNELS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_CHANNELS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_OTHER_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_COMBINED_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_RX_COUNT] = { .type = NLA_U32 },
+ [ETHTOOL_A_CHANNELS_TX_COUNT] = { .type = NLA_U32 },
+ [ETHTOOL_A_CHANNELS_OTHER_COUNT] = { .type = NLA_U32 },
+ [ETHTOOL_A_CHANNELS_COMBINED_COUNT] = { .type = NLA_U32 },
+};
+
+int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_CHANNELS_MAX + 1];
+ unsigned int from_channel, old_total, i;
+ struct ethtool_channels channels = {};
+ struct ethnl_req_info req_info = {};
+ const struct nlattr *err_attr;
+ const struct ethtool_ops *ops;
+ struct net_device *dev;
+ u32 max_rx_in_use = 0;
+ bool mod = false;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_CHANNELS_MAX, channels_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_CHANNELS_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+ ops = dev->ethtool_ops;
+ ret = -EOPNOTSUPP;
+ if (!ops->get_channels || !ops->set_channels)
+ goto out_dev;
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+ ops->get_channels(dev, &channels);
+ old_total = channels.combined_count +
+ max(channels.rx_count, channels.tx_count);
+
+ ethnl_update_u32(&channels.rx_count, tb[ETHTOOL_A_CHANNELS_RX_COUNT],
+ &mod);
+ ethnl_update_u32(&channels.tx_count, tb[ETHTOOL_A_CHANNELS_TX_COUNT],
+ &mod);
+ ethnl_update_u32(&channels.other_count,
+ tb[ETHTOOL_A_CHANNELS_OTHER_COUNT], &mod);
+ ethnl_update_u32(&channels.combined_count,
+ tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT], &mod);
+ ret = 0;
+ if (!mod)
+ goto out_ops;
+
+ /* ensure new channel counts are within limits */
+ if (channels.rx_count > channels.max_rx)
+ err_attr = tb[ETHTOOL_A_CHANNELS_RX_COUNT];
+ else if (channels.tx_count > channels.max_tx)
+ err_attr = tb[ETHTOOL_A_CHANNELS_TX_COUNT];
+ else if (channels.other_count > channels.max_other)
+ err_attr = tb[ETHTOOL_A_CHANNELS_OTHER_COUNT];
+ else if (channels.combined_count > channels.max_combined)
+ err_attr = tb[ETHTOOL_A_CHANNELS_COMBINED_COUNT];
+ else
+ err_attr = NULL;
+ if (err_attr) {
+ ret = -EINVAL;
+ NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
+ "requested channel count exceeeds maximum");
+ goto out_ops;
+ }
+
+ /* ensure the new Rx count fits within the configured Rx flow
+ * indirection table settings
+ */
+ if (netif_is_rxfh_configured(dev) &&
+ !ethtool_get_max_rxfh_channel(dev, &max_rx_in_use) &&
+ (channels.combined_count + channels.rx_count) <= max_rx_in_use) {
+ GENL_SET_ERR_MSG(info, "requested channel counts are too low for existing indirection table settings");
+ return -EINVAL;
+ }
+
+ /* Disabling channels, query zero-copy AF_XDP sockets */
+ from_channel = channels.combined_count +
+ min(channels.rx_count, channels.tx_count);
+ for (i = from_channel; i < old_total; i++)
+ if (xdp_get_umem_from_qid(dev, i)) {
+ GENL_SET_ERR_MSG(info, "requested channel counts are too low for existing zerocopy AF_XDP sockets");
+ return -EINVAL;
+ }
+
+ ret = dev->ethtool_ops->set_channels(dev, &channels);
+
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+out_dev:
+ dev_put(dev);
+ return ret;
+}
diff --git a/net/ethtool/common.c b/net/ethtool/common.c
index 7b6969af5ae7..0b22741b2f8f 100644
--- a/net/ethtool/common.c
+++ b/net/ethtool/common.c
@@ -258,3 +258,34 @@ int __ethtool_get_link(struct net_device *dev)
return netif_running(dev) && dev->ethtool_ops->get_link(dev);
}
+
+int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
+{
+ u32 dev_size, current_max = 0;
+ u32 *indir;
+ int ret;
+
+ if (!dev->ethtool_ops->get_rxfh_indir_size ||
+ !dev->ethtool_ops->get_rxfh)
+ return -EOPNOTSUPP;
+ dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
+ if (dev_size == 0)
+ return -EOPNOTSUPP;
+
+ indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
+ if (!indir)
+ return -ENOMEM;
+
+ ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
+ if (ret)
+ goto out;
+
+ while (dev_size--)
+ current_max = max(current_max, indir[dev_size]);
+
+ *max = current_max;
+
+out:
+ kfree(indir);
+ return ret;
+}
diff --git a/net/ethtool/common.h b/net/ethtool/common.h
index 7dc1163800a7..03946e16e623 100644
--- a/net/ethtool/common.h
+++ b/net/ethtool/common.h
@@ -29,5 +29,6 @@ int __ethtool_get_link(struct net_device *dev);
bool convert_legacy_settings_to_link_ksettings(
struct ethtool_link_ksettings *link_ksettings,
const struct ethtool_cmd *legacy_settings);
+int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max);
#endif /* _ETHTOOL_COMMON_H */
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 1d5c1b6b81a4..06224a03139e 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -929,37 +929,6 @@ void netdev_rss_key_fill(void *buffer, size_t len)
}
EXPORT_SYMBOL(netdev_rss_key_fill);
-static int ethtool_get_max_rxfh_channel(struct net_device *dev, u32 *max)
-{
- u32 dev_size, current_max = 0;
- u32 *indir;
- int ret;
-
- if (!dev->ethtool_ops->get_rxfh_indir_size ||
- !dev->ethtool_ops->get_rxfh)
- return -EOPNOTSUPP;
- dev_size = dev->ethtool_ops->get_rxfh_indir_size(dev);
- if (dev_size == 0)
- return -EOPNOTSUPP;
-
- indir = kcalloc(dev_size, sizeof(indir[0]), GFP_USER);
- if (!indir)
- return -ENOMEM;
-
- ret = dev->ethtool_ops->get_rxfh(dev, indir, NULL, NULL);
- if (ret)
- goto out;
-
- while (dev_size--)
- current_max = max(current_max, indir[dev_size]);
-
- *max = current_max;
-
-out:
- kfree(indir);
- return ret;
-}
-
static noinline_for_stack int ethtool_get_rxfh_indir(struct net_device *dev,
void __user *useraddr)
{
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index ac35513abeed..f61654b8f210 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -771,6 +771,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_CHANNELS_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_set_channels,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 53bfe720ff1a..45aad99a6021 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -349,5 +349,6 @@ int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info);
+int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
--
2.25.1
Implement PRIVFLAGS_SET netlink request to set private flags of a network
device. These are traditionally set with ETHTOOL_SPFLAGS ioctl request.
Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 21 +++++-
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.c | 5 ++
net/ethtool/netlink.h | 1 +
net/ethtool/privflags.c | 70 ++++++++++++++++++++
5 files changed, 97 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 7bba4c940ef7..e553112fa2d7 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -192,6 +192,7 @@ Userspace to kernel:
``ETHTOOL_MSG_FEATURES_GET`` get device features
``ETHTOOL_MSG_FEATURES_SET`` set device features
``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
+ ``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
===================================== ================================
Kernel to userspace:
@@ -211,6 +212,7 @@ Kernel to userspace:
``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
+ ``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -626,6 +628,23 @@ response uses all private flags supported by the device as mask so that client
gets the full information without having to fetch the string set with names.
+PRIVFLAGS_SET
+=============
+
+Sets or modifies values of device private flags like ``ETHTOOL_SPFLAGS``
+ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested request header
+ ``ETHTOOL_A_PRIVFLAGS_FLAGS`` bitset private flags
+ ==================================== ====== ==========================
+
+``ETHTOOL_A_PRIVFLAGS_FLAGS`` can either set the whole set of private flags or
+modify only values of some of them.
+
+
Request translation
===================
@@ -676,7 +695,7 @@ have their netlink replacement yet.
``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFLAGS`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_GET``
- ``ETHTOOL_SPFLAGS`` n/a
+ ``ETHTOOL_SPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_SET``
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
``ETHTOOL_GGRO`` ``ETHTOOL_MSG_FEATURES_GET``
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index d94bbf5e4d1c..13e631c86825 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -27,6 +27,7 @@ enum {
ETHTOOL_MSG_FEATURES_GET,
ETHTOOL_MSG_FEATURES_SET,
ETHTOOL_MSG_PRIVFLAGS_GET,
+ ETHTOOL_MSG_PRIVFLAGS_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 9cbb1d8b4d23..b6795aad7ccb 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -741,6 +741,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_PRIVFLAGS_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_set_privflags,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 36cf077c3085..ca789f587ef3 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -345,5 +345,6 @@ int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
+int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
index 169dd4a832f6..dfa76d552277 100644
--- a/net/ethtool/privflags.c
+++ b/net/ethtool/privflags.c
@@ -134,3 +134,73 @@ const struct ethnl_request_ops ethnl_privflags_request_ops = {
.fill_reply = privflags_fill_reply,
.cleanup_data = privflags_cleanup_data,
};
+
+/* PRIVFLAGS_SET */
+
+static const struct nla_policy
+privflags_set_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
+ [ETHTOOL_A_PRIVFLAGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PRIVFLAGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_PRIVFLAGS_FLAGS] = { .type = NLA_NESTED },
+};
+
+int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_PRIVFLAGS_MAX + 1];
+ const char (*names)[ETH_GSTRING_LEN] = NULL;
+ struct ethnl_req_info req_info = {};
+ const struct ethtool_ops *ops;
+ struct net_device *dev;
+ unsigned int nflags;
+ bool mod = false;
+ bool compact;
+ u32 flags;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_PRIVFLAGS_MAX, privflags_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ if (!tb[ETHTOOL_A_PRIVFLAGS_FLAGS])
+ return -EINVAL;
+ ret = ethnl_bitset_is_compact(tb[ETHTOOL_A_PRIVFLAGS_FLAGS], &compact);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_PRIVFLAGS_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+ ops = dev->ethtool_ops;
+ if (!ops->get_priv_flags || !ops->set_priv_flags ||
+ !ops->get_sset_count || !ops->get_strings)
+ return -EOPNOTSUPP;
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+ ret = ethnl_get_priv_flags_info(dev, &nflags, compact ? NULL : &names);
+ if (ret < 0)
+ goto out_ops;
+ flags = ops->get_priv_flags(dev);
+
+ ret = ethnl_update_bitset32(&flags, nflags,
+ tb[ETHTOOL_A_PRIVFLAGS_FLAGS], names,
+ info->extack, &mod);
+ if (ret < 0 || !mod)
+ goto out_free;
+ ret = ops->set_priv_flags(dev, flags);
+
+out_free:
+ kfree(names);
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+ dev_put(dev);
+ return ret;
+}
--
2.25.1
Implement RINGS_SET netlink request to set ring sizes of a network device.
These are traditionally set with ETHTOOL_SRINGPARAM ioctl request.
Like the ioctl implementation, the generic ethtool code checks if supplied
values do not exceed driver defined limits; if they do, first offending
attribute is reported using extack.
v2:
- fix netdev reference leak in error path (found by Jakub Kicinsky)
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 23 ++++-
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/netlink.c | 5 ++
net/ethtool/netlink.h | 1 +
net/ethtool/rings.c | 89 ++++++++++++++++++++
5 files changed, 118 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 798c2f97d89b..ba31ae8f1feb 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -194,6 +194,7 @@ Userspace to kernel:
``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
``ETHTOOL_MSG_RINGS_GET`` get ring sizes
+ ``ETHTOOL_MSG_RINGS_SET`` set ring sizes
===================================== ================================
Kernel to userspace:
@@ -673,6 +674,26 @@ Kernel response contents:
==================================== ====== ==========================
+RINGS_SET
+=========
+
+Sets ring sizes like ``ETHTOOL_SRINGPARAM`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_RINGS_HEADER`` nested reply header
+ ``ETHTOOL_A_RINGS_RX`` u32 size of RX ring
+ ``ETHTOOL_A_RINGS_RX_MINI`` u32 size of RX mini ring
+ ``ETHTOOL_A_RINGS_RX_JUMBO`` u32 size of RX jumbo ring
+ ``ETHTOOL_A_RINGS_TX`` u32 size of TX ring
+ ==================================== ====== ==========================
+
+Kernel checks that requested ring sizes do not exceed limits reported by
+driver. Driver may impose additional constraints and may not suspport all
+attributes.
+
+
Request translation
===================
@@ -700,7 +721,7 @@ have their netlink replacement yet.
``ETHTOOL_GCOALESCE`` n/a
``ETHTOOL_SCOALESCE`` n/a
``ETHTOOL_GRINGPARAM`` ``ETHTOOL_MSG_RINGS_GET``
- ``ETHTOOL_SRINGPARAM`` n/a
+ ``ETHTOOL_SRINGPARAM`` ``ETHTOOL_MSG_RINGS_SET``
``ETHTOOL_GPAUSEPARAM`` n/a
``ETHTOOL_SPAUSEPARAM`` n/a
``ETHTOOL_GRXCSUM`` ``ETHTOOL_MSG_FEATURES_GET``
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 7cd220f8cf73..ae71801b7aac 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -29,6 +29,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_GET,
ETHTOOL_MSG_PRIVFLAGS_SET,
ETHTOOL_MSG_RINGS_GET,
+ ETHTOOL_MSG_RINGS_SET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 0dc25a490450..6a1ac8897a7e 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -756,6 +756,11 @@ static const struct genl_ops ethtool_genl_ops[] = {
.dumpit = ethnl_default_dumpit,
.done = ethnl_default_done,
},
+ {
+ .cmd = ETHTOOL_MSG_RINGS_SET,
+ .flags = GENL_UNS_ADMIN_PERM,
+ .doit = ethnl_set_rings,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 01761932ed15..b30426d01890 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -347,5 +347,6 @@ int ethnl_set_debug(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_wol(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_features(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_privflags(struct sk_buff *skb, struct genl_info *info);
+int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info);
#endif /* _NET_ETHTOOL_NETLINK_H */
diff --git a/net/ethtool/rings.c b/net/ethtool/rings.c
index d3129d8a252d..93f428e9a6c2 100644
--- a/net/ethtool/rings.c
+++ b/net/ethtool/rings.c
@@ -106,3 +106,92 @@ const struct ethnl_request_ops ethnl_rings_request_ops = {
.reply_size = rings_reply_size,
.fill_reply = rings_fill_reply,
};
+
+/* RINGS_SET */
+
+static const struct nla_policy
+rings_set_policy[ETHTOOL_A_RINGS_MAX + 1] = {
+ [ETHTOOL_A_RINGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_RINGS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_MINI_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX_JUMBO_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_RINGS_RX] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_RX_MINI] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_RX_JUMBO] = { .type = NLA_U32 },
+ [ETHTOOL_A_RINGS_TX] = { .type = NLA_U32 },
+};
+
+int ethnl_set_rings(struct sk_buff *skb, struct genl_info *info)
+{
+ struct nlattr *tb[ETHTOOL_A_RINGS_MAX + 1];
+ struct ethtool_ringparam ringparam = {};
+ struct ethnl_req_info req_info = {};
+ const struct nlattr *err_attr;
+ const struct ethtool_ops *ops;
+ struct net_device *dev;
+ bool mod = false;
+ int ret;
+
+ ret = nlmsg_parse(info->nlhdr, GENL_HDRLEN, tb,
+ ETHTOOL_A_RINGS_MAX, rings_set_policy,
+ info->extack);
+ if (ret < 0)
+ return ret;
+ ret = ethnl_parse_header_dev_get(&req_info,
+ tb[ETHTOOL_A_RINGS_HEADER],
+ genl_info_net(info), info->extack,
+ true);
+ if (ret < 0)
+ return ret;
+ dev = req_info.dev;
+ ops = dev->ethtool_ops;
+ ret = -EOPNOTSUPP;
+ if (!ops->get_ringparam || !ops->set_ringparam)
+ goto out_dev;
+
+ rtnl_lock();
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ goto out_rtnl;
+ ops->get_ringparam(dev, &ringparam);
+
+ ethnl_update_u32(&ringparam.rx_pending, tb[ETHTOOL_A_RINGS_RX], &mod);
+ ethnl_update_u32(&ringparam.rx_mini_pending,
+ tb[ETHTOOL_A_RINGS_RX_MINI], &mod);
+ ethnl_update_u32(&ringparam.rx_jumbo_pending,
+ tb[ETHTOOL_A_RINGS_RX_JUMBO], &mod);
+ ethnl_update_u32(&ringparam.tx_pending, tb[ETHTOOL_A_RINGS_TX], &mod);
+ ret = 0;
+ if (!mod)
+ goto out_ops;
+
+ /* ensure new ring parameters are within limits */
+ if (ringparam.rx_pending > ringparam.rx_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX];
+ else if (ringparam.rx_mini_pending > ringparam.rx_mini_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX_MINI];
+ else if (ringparam.rx_jumbo_pending > ringparam.rx_jumbo_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_RX_JUMBO];
+ else if (ringparam.tx_pending > ringparam.tx_max_pending)
+ err_attr = tb[ETHTOOL_A_RINGS_TX];
+ else
+ err_attr = NULL;
+ if (err_attr) {
+ ret = -EINVAL;
+ NL_SET_ERR_MSG_ATTR(info->extack, err_attr,
+ "requested ring size exceeeds maximum");
+ goto out_ops;
+ }
+
+ ret = dev->ethtool_ops->set_ringparam(dev, &ringparam);
+
+out_ops:
+ ethnl_ops_complete(dev);
+out_rtnl:
+ rtnl_unlock();
+out_dev:
+ dev_put(dev);
+ return ret;
+}
--
2.25.1
Implement PRIVFLAGS_GET request to get private flags for a network device.
These are traditionally available via ETHTOOL_GPFLAGS ioctl request.
Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 30 +++-
include/uapi/linux/ethtool_netlink.h | 14 ++
net/ethtool/Makefile | 2 +-
net/ethtool/netlink.c | 8 ++
net/ethtool/netlink.h | 1 +
net/ethtool/privflags.c | 136 +++++++++++++++++++
6 files changed, 189 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/privflags.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 47542f042e9d..7bba4c940ef7 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -191,6 +191,7 @@ Userspace to kernel:
``ETHTOOL_MSG_WOL_SET`` set wake-on-lan settings
``ETHTOOL_MSG_FEATURES_GET`` get device features
``ETHTOOL_MSG_FEATURES_SET`` set device features
+ ``ETHTOOL_MSG_PRIVFLAGS_GET`` get private flags
===================================== ================================
Kernel to userspace:
@@ -209,6 +210,7 @@ Kernel to userspace:
``ETHTOOL_MSG_FEATURES_GET_REPLY`` device features
``ETHTOOL_MSG_FEATURES_SET_REPLY`` optional reply to FEATURES_SET
``ETHTOOL_MSG_FEATURES_NTF`` netdev features notification
+ ``ETHTOOL_MSG_PRIVFLAGS_GET_REPLY`` private flags
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -598,6 +600,32 @@ request but also each time features are modified with netdev_update_features()
or netdev_change_features().
+PRIVFLAGS_GET
+=============
+
+Gets private flags like ``ETHTOOL_GPFLAGS`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_PRIVFLAGS_HEADER`` nested reply header
+ ``ETHTOOL_A_PRIVFLAGS_FLAGS`` bitset private flags
+ ==================================== ====== ==========================
+
+``ETHTOOL_A_PRIVFLAGS_FLAGS`` is a bitset with values of device private flags.
+These flags are defined by driver, their number and names (and also meaning)
+are device dependent. For compact bitset format, names can be retrieved as
+``ETH_SS_PRIV_FLAGS`` string set. If verbose bitset format is requested,
+response uses all private flags supported by the device as mask so that client
+gets the full information without having to fetch the string set with names.
+
+
Request translation
===================
@@ -647,7 +675,7 @@ have their netlink replacement yet.
``ETHTOOL_SGSO`` ``ETHTOOL_MSG_FEATURES_SET``
``ETHTOOL_GFLAGS`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFLAGS`` ``ETHTOOL_MSG_FEATURES_SET``
- ``ETHTOOL_GPFLAGS`` n/a
+ ``ETHTOOL_GPFLAGS`` ``ETHTOOL_MSG_PRIVFLAGS_GET``
``ETHTOOL_SPFLAGS`` n/a
``ETHTOOL_GRXFH`` n/a
``ETHTOOL_SRXFH`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index 3d0204cf96a6..d94bbf5e4d1c 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -26,6 +26,7 @@ enum {
ETHTOOL_MSG_WOL_SET,
ETHTOOL_MSG_FEATURES_GET,
ETHTOOL_MSG_FEATURES_SET,
+ ETHTOOL_MSG_PRIVFLAGS_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -48,6 +49,7 @@ enum {
ETHTOOL_MSG_FEATURES_GET_REPLY,
ETHTOOL_MSG_FEATURES_SET_REPLY,
ETHTOOL_MSG_FEATURES_NTF,
+ ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -248,6 +250,18 @@ enum {
ETHTOOL_A_FEATURES_MAX = __ETHTOOL_A_FEATURES_CNT - 1
};
+/* PRIVFLAGS */
+
+enum {
+ ETHTOOL_A_PRIVFLAGS_UNSPEC,
+ ETHTOOL_A_PRIVFLAGS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_PRIVFLAGS_FLAGS, /* bitset */
+
+ /* add new constants above here */
+ __ETHTOOL_A_PRIVFLAGS_CNT,
+ ETHTOOL_A_PRIVFLAGS_MAX = __ETHTOOL_A_PRIVFLAGS_CNT - 1
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index 5be8c9ab26d1..58708bcc2968 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -5,4 +5,4 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
- linkstate.o debug.o wol.o features.o
+ linkstate.o debug.o wol.o features.o privflags.o
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 5c0e361bfd66..9cbb1d8b4d23 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -216,6 +216,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_DEBUG_GET] = ðnl_debug_request_ops,
[ETHTOOL_MSG_WOL_GET] = ðnl_wol_request_ops,
[ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
+ [ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -733,6 +734,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_features,
},
+ {
+ .cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index 135836201e89..36cf077c3085 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -338,6 +338,7 @@ extern const struct ethnl_request_ops ethnl_linkstate_request_ops;
extern const struct ethnl_request_ops ethnl_debug_request_ops;
extern const struct ethnl_request_ops ethnl_wol_request_ops;
extern const struct ethnl_request_ops ethnl_features_request_ops;
+extern const struct ethnl_request_ops ethnl_privflags_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
diff --git a/net/ethtool/privflags.c b/net/ethtool/privflags.c
new file mode 100644
index 000000000000..169dd4a832f6
--- /dev/null
+++ b/net/ethtool/privflags.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+#include "bitset.h"
+
+struct privflags_req_info {
+ struct ethnl_req_info base;
+};
+
+struct privflags_reply_data {
+ struct ethnl_reply_data base;
+ const char (*priv_flag_names)[ETH_GSTRING_LEN];
+ unsigned int n_priv_flags;
+ u32 priv_flags;
+};
+
+#define PRIVFLAGS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct privflags_reply_data, base)
+
+static const struct nla_policy
+privflags_get_policy[ETHTOOL_A_PRIVFLAGS_MAX + 1] = {
+ [ETHTOOL_A_PRIVFLAGS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_PRIVFLAGS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_PRIVFLAGS_FLAGS] = { .type = NLA_REJECT },
+};
+
+static int ethnl_get_priv_flags_info(struct net_device *dev,
+ unsigned int *count,
+ const char (**names)[ETH_GSTRING_LEN])
+{
+ const struct ethtool_ops *ops = dev->ethtool_ops;
+ int nflags;
+
+ nflags = ops->get_sset_count(dev, ETH_SS_PRIV_FLAGS);
+ if (nflags < 0)
+ return nflags;
+
+ if (names) {
+ *names = kcalloc(nflags, ETH_GSTRING_LEN, GFP_KERNEL);
+ if (!*names)
+ return -ENOMEM;
+ ops->get_strings(dev, ETH_SS_PRIV_FLAGS, (u8 *)*names);
+ }
+
+ /* We can pass more than 32 private flags to userspace via netlink but
+ * we cannot get more with ethtool_ops::get_priv_flags(). Note that we
+ * must not adjust nflags before allocating the space for flag names
+ * as the buffer must be large enough for all flags.
+ */
+ if (WARN_ONCE(nflags > 32,
+ "device %s reports more than 32 private flags (%d)\n",
+ netdev_name(dev), nflags))
+ nflags = 32;
+ *count = nflags;
+
+ return 0;
+}
+
+static int privflags_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ const char (*names)[ETH_GSTRING_LEN];
+ const struct ethtool_ops *ops;
+ unsigned int nflags;
+ int ret;
+
+ ops = dev->ethtool_ops;
+ if (!ops->get_priv_flags || !ops->get_sset_count || !ops->get_strings)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+
+ ret = ethnl_get_priv_flags_info(dev, &nflags, &names);
+ if (ret < 0)
+ goto out_ops;
+ data->priv_flags = ops->get_priv_flags(dev);
+ data->priv_flag_names = names;
+ data->n_priv_flags = nflags;
+
+out_ops:
+ ethnl_ops_complete(dev);
+ return ret;
+}
+
+static int privflags_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
+
+ return ethnl_bitset32_size(&data->priv_flags, &all_flags,
+ data->n_priv_flags,
+ data->priv_flag_names, compact);
+}
+
+static int privflags_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_base);
+ bool compact = req_base->flags & ETHTOOL_FLAG_COMPACT_BITSETS;
+ const u32 all_flags = ~(u32)0 >> (32 - data->n_priv_flags);
+
+ return ethnl_put_bitset32(skb, ETHTOOL_A_PRIVFLAGS_FLAGS,
+ &data->priv_flags, &all_flags,
+ data->n_priv_flags, data->priv_flag_names,
+ compact);
+}
+
+static void privflags_cleanup_data(struct ethnl_reply_data *reply_data)
+{
+ struct privflags_reply_data *data = PRIVFLAGS_REPDATA(reply_data);
+
+ kfree(data->priv_flag_names);
+}
+
+const struct ethnl_request_ops ethnl_privflags_request_ops = {
+ .request_cmd = ETHTOOL_MSG_PRIVFLAGS_GET,
+ .reply_cmd = ETHTOOL_MSG_PRIVFLAGS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_PRIVFLAGS_HEADER,
+ .max_attr = ETHTOOL_A_PRIVFLAGS_MAX,
+ .req_info_size = sizeof(struct privflags_req_info),
+ .reply_data_size = sizeof(struct privflags_reply_data),
+ .request_policy = privflags_get_policy,
+
+ .prepare_data = privflags_prepare_data,
+ .reply_size = privflags_reply_size,
+ .fill_reply = privflags_fill_reply,
+ .cleanup_data = privflags_cleanup_data,
+};
--
2.25.1
Send ETHTOOL_MSG_CHANNELS_NTF notification whenever channel counts of
a network device are modified using ETHTOOL_MSG_CHANNELS_SET netlink
message or ETHTOOL_SCHANNELS ioctl request.
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 1 +
include/uapi/linux/ethtool_netlink.h | 1 +
net/ethtool/channels.c | 3 +++
net/ethtool/ioctl.c | 6 +++++-
net/ethtool/netlink.c | 2 ++
5 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 7df7476cf310..31a601cafa3f 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -220,6 +220,7 @@ Kernel to userspace:
``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
``ETHTOOL_MSG_RINGS_NTF`` ring sizes
``ETHTOOL_MSG_CHANNELS_GET_REPLY`` channel counts
+ ``ETHTOOL_MSG_CHANNELS_NTF`` channel counts
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index f1384a8f3534..c7c7a1a550af 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -59,6 +59,7 @@ enum {
ETHTOOL_MSG_RINGS_GET_REPLY,
ETHTOOL_MSG_RINGS_NTF,
ETHTOOL_MSG_CHANNELS_GET_REPLY,
+ ETHTOOL_MSG_CHANNELS_NTF,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
index ee232c11acae..8dc5485333a4 100644
--- a/net/ethtool/channels.c
+++ b/net/ethtool/channels.c
@@ -213,6 +213,9 @@ int ethnl_set_channels(struct sk_buff *skb, struct genl_info *info)
}
ret = dev->ethtool_ops->set_channels(dev, &channels);
+ if (ret < 0)
+ goto out_ops;
+ ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
out_ops:
ethnl_ops_complete(dev);
diff --git a/net/ethtool/ioctl.c b/net/ethtool/ioctl.c
index 06224a03139e..258840b19fb5 100644
--- a/net/ethtool/ioctl.c
+++ b/net/ethtool/ioctl.c
@@ -1649,6 +1649,7 @@ static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
u16 from_channel, to_channel;
u32 max_rx_in_use = 0;
unsigned int i;
+ int ret;
if (!dev->ethtool_ops->set_channels || !dev->ethtool_ops->get_channels)
return -EOPNOTSUPP;
@@ -1680,7 +1681,10 @@ static noinline_for_stack int ethtool_set_channels(struct net_device *dev,
if (xdp_get_umem_from_qid(dev, i))
return -EINVAL;
- return dev->ethtool_ops->set_channels(dev, &channels);
+ ret = dev->ethtool_ops->set_channels(dev, &channels);
+ if (!ret)
+ ethtool_notify(dev, ETHTOOL_MSG_CHANNELS_NTF, NULL);
+ return ret;
}
static int ethtool_get_pauseparam(struct net_device *dev, void __user *useraddr)
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index f61654b8f210..55c8ce4019d9 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -534,6 +534,7 @@ ethnl_default_notify_ops[ETHTOOL_MSG_KERNEL_MAX + 1] = {
[ETHTOOL_MSG_FEATURES_NTF] = ðnl_features_request_ops,
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ðnl_privflags_request_ops,
[ETHTOOL_MSG_RINGS_NTF] = ðnl_rings_request_ops,
+ [ETHTOOL_MSG_CHANNELS_NTF] = ðnl_channels_request_ops,
};
/* default notification handler */
@@ -622,6 +623,7 @@ static const ethnl_notify_handler_t ethnl_notify_handlers[] = {
[ETHTOOL_MSG_FEATURES_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_PRIVFLAGS_NTF] = ethnl_default_notify,
[ETHTOOL_MSG_RINGS_NTF] = ethnl_default_notify,
+ [ETHTOOL_MSG_CHANNELS_NTF] = ethnl_default_notify,
};
void ethtool_notify(struct net_device *dev, unsigned int cmd, const void *data)
--
2.25.1
Implement CHANNELS_GET request to get channel counts of a network device.
These are traditionally available via ETHTOOL_GCHANNELS ioctl request.
Omit attributes for channel types which are not supported by driver or
device (zero reported for maximum).
v2: (all suggested by Jakub Kicinski)
- minor cleanup in channels_prepare_data()
- more descriptive channels_reply_size()
- omit attributes with zero max count
Signed-off-by: Michal Kubecek <[email protected]>
---
Documentation/networking/ethtool-netlink.rst | 30 +++++-
include/uapi/linux/ethtool_netlink.h | 21 ++++
net/ethtool/Makefile | 3 +-
net/ethtool/channels.c | 108 +++++++++++++++++++
net/ethtool/netlink.c | 8 ++
net/ethtool/netlink.h | 1 +
6 files changed, 169 insertions(+), 2 deletions(-)
create mode 100644 net/ethtool/channels.c
diff --git a/Documentation/networking/ethtool-netlink.rst b/Documentation/networking/ethtool-netlink.rst
index 026a5fd4a08b..decbbddfd8be 100644
--- a/Documentation/networking/ethtool-netlink.rst
+++ b/Documentation/networking/ethtool-netlink.rst
@@ -195,6 +195,7 @@ Userspace to kernel:
``ETHTOOL_MSG_PRIVFLAGS_SET`` set private flags
``ETHTOOL_MSG_RINGS_GET`` get ring sizes
``ETHTOOL_MSG_RINGS_SET`` set ring sizes
+ ``ETHTOOL_MSG_CHANNELS_GET`` get channel counts
===================================== ================================
Kernel to userspace:
@@ -217,6 +218,7 @@ Kernel to userspace:
``ETHTOOL_MSG_PRIVFLAGS_NTF`` private flags
``ETHTOOL_MSG_RINGS_GET_REPLY`` ring sizes
``ETHTOOL_MSG_RINGS_NTF`` ring sizes
+ ``ETHTOOL_MSG_CHANNELS_GET_REPLY`` channel counts
===================================== =================================
``GET`` requests are sent by userspace applications to retrieve device
@@ -695,6 +697,32 @@ driver. Driver may impose additional constraints and may not suspport all
attributes.
+CHANNELS_GET
+============
+
+Gets channel counts like ``ETHTOOL_GCHANNELS`` ioctl request.
+
+Request contents:
+
+ ==================================== ====== ==========================
+ ``ETHTOOL_A_CHANNELS_HEADER`` nested request header
+ ==================================== ====== ==========================
+
+Kernel response contents:
+
+ ===================================== ====== ==========================
+ ``ETHTOOL_A_CHANNELS_HEADER`` nested reply header
+ ``ETHTOOL_A_CHANNELS_RX_MAX`` u32 max receive channels
+ ``ETHTOOL_A_CHANNELS_TX_MAX`` u32 max transmit channels
+ ``ETHTOOL_A_CHANNELS_OTHER_MAX`` u32 max other channels
+ ``ETHTOOL_A_CHANNELS_COMBINED_MAX`` u32 max combined channels
+ ``ETHTOOL_A_CHANNELS_RX_COUNT`` u32 receive channel count
+ ``ETHTOOL_A_CHANNELS_TX_COUNT`` u32 transmit channel count
+ ``ETHTOOL_A_CHANNELS_OTHER_COUNT`` u32 other channel count
+ ``ETHTOOL_A_CHANNELS_COMBINED_COUNT`` u32 combined channel count
+ ===================================== ====== ==========================
+
+
Request translation
===================
@@ -765,7 +793,7 @@ have their netlink replacement yet.
``ETHTOOL_SRXFHINDIR`` n/a
``ETHTOOL_GFEATURES`` ``ETHTOOL_MSG_FEATURES_GET``
``ETHTOOL_SFEATURES`` ``ETHTOOL_MSG_FEATURES_SET``
- ``ETHTOOL_GCHANNELS`` n/a
+ ``ETHTOOL_GCHANNELS`` ``ETHTOOL_MSG_CHANNELS_GET``
``ETHTOOL_SCHANNELS`` n/a
``ETHTOOL_SET_DUMP`` n/a
``ETHTOOL_GET_DUMP_FLAG`` n/a
diff --git a/include/uapi/linux/ethtool_netlink.h b/include/uapi/linux/ethtool_netlink.h
index abfc8fd626da..2270eb115eca 100644
--- a/include/uapi/linux/ethtool_netlink.h
+++ b/include/uapi/linux/ethtool_netlink.h
@@ -30,6 +30,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_SET,
ETHTOOL_MSG_RINGS_GET,
ETHTOOL_MSG_RINGS_SET,
+ ETHTOOL_MSG_CHANNELS_GET,
/* add new constants above here */
__ETHTOOL_MSG_USER_CNT,
@@ -56,6 +57,7 @@ enum {
ETHTOOL_MSG_PRIVFLAGS_NTF,
ETHTOOL_MSG_RINGS_GET_REPLY,
ETHTOOL_MSG_RINGS_NTF,
+ ETHTOOL_MSG_CHANNELS_GET_REPLY,
/* add new constants above here */
__ETHTOOL_MSG_KERNEL_CNT,
@@ -287,6 +289,25 @@ enum {
ETHTOOL_A_RINGS_MAX = (__ETHTOOL_A_RINGS_CNT - 1)
};
+/* CHANNELS */
+
+enum {
+ ETHTOOL_A_CHANNELS_UNSPEC,
+ ETHTOOL_A_CHANNELS_HEADER, /* nest - _A_HEADER_* */
+ ETHTOOL_A_CHANNELS_RX_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_TX_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_OTHER_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_COMBINED_MAX, /* u32 */
+ ETHTOOL_A_CHANNELS_RX_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_TX_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_OTHER_COUNT, /* u32 */
+ ETHTOOL_A_CHANNELS_COMBINED_COUNT, /* u32 */
+
+ /* add new constants above here */
+ __ETHTOOL_A_CHANNELS_CNT,
+ ETHTOOL_A_CHANNELS_MAX = (__ETHTOOL_A_CHANNELS_CNT - 1)
+};
+
/* generic netlink info */
#define ETHTOOL_GENL_NAME "ethtool"
#define ETHTOOL_GENL_VERSION 1
diff --git a/net/ethtool/Makefile b/net/ethtool/Makefile
index b48b70ef4ed0..b0bd3decad02 100644
--- a/net/ethtool/Makefile
+++ b/net/ethtool/Makefile
@@ -5,4 +5,5 @@ obj-y += ioctl.o common.o
obj-$(CONFIG_ETHTOOL_NETLINK) += ethtool_nl.o
ethtool_nl-y := netlink.o bitset.o strset.o linkinfo.o linkmodes.o \
- linkstate.o debug.o wol.o features.o privflags.o rings.o
+ linkstate.o debug.o wol.o features.o privflags.o rings.o \
+ channels.o
diff --git a/net/ethtool/channels.c b/net/ethtool/channels.c
new file mode 100644
index 000000000000..500dd5ad250b
--- /dev/null
+++ b/net/ethtool/channels.c
@@ -0,0 +1,108 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include "netlink.h"
+#include "common.h"
+
+struct channels_req_info {
+ struct ethnl_req_info base;
+};
+
+struct channels_reply_data {
+ struct ethnl_reply_data base;
+ struct ethtool_channels channels;
+};
+
+#define CHANNELS_REPDATA(__reply_base) \
+ container_of(__reply_base, struct channels_reply_data, base)
+
+static const struct nla_policy
+channels_get_policy[ETHTOOL_A_CHANNELS_MAX + 1] = {
+ [ETHTOOL_A_CHANNELS_UNSPEC] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_HEADER] = { .type = NLA_NESTED },
+ [ETHTOOL_A_CHANNELS_RX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_TX_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_OTHER_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_COMBINED_MAX] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_RX_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_TX_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_OTHER_COUNT] = { .type = NLA_REJECT },
+ [ETHTOOL_A_CHANNELS_COMBINED_COUNT] = { .type = NLA_REJECT },
+};
+
+static int channels_prepare_data(const struct ethnl_req_info *req_base,
+ struct ethnl_reply_data *reply_base,
+ struct genl_info *info)
+{
+ struct channels_reply_data *data = CHANNELS_REPDATA(reply_base);
+ struct net_device *dev = reply_base->dev;
+ int ret;
+
+ if (!dev->ethtool_ops->get_channels)
+ return -EOPNOTSUPP;
+ ret = ethnl_ops_begin(dev);
+ if (ret < 0)
+ return ret;
+ dev->ethtool_ops->get_channels(dev, &data->channels);
+ ethnl_ops_complete(dev);
+
+ return 0;
+}
+
+static int channels_reply_size(const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ return nla_total_size(sizeof(u32)) + /* _CHANNELS_RX_MAX */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_TX_MAX */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_OTHER_MAX */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_COMBINED_MAX */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_RX_COUNT */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_TX_COUNT */
+ nla_total_size(sizeof(u32)) + /* _CHANNELS_OTHER_COUNT */
+ nla_total_size(sizeof(u32)); /* _CHANNELS_COMBINED_COUNT */
+}
+
+static int channels_fill_reply(struct sk_buff *skb,
+ const struct ethnl_req_info *req_base,
+ const struct ethnl_reply_data *reply_base)
+{
+ const struct channels_reply_data *data = CHANNELS_REPDATA(reply_base);
+ const struct ethtool_channels *channels = &data->channels;
+
+ if ((channels->max_rx &&
+ (nla_put_u32(skb, ETHTOOL_A_CHANNELS_RX_MAX,
+ channels->max_rx) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_RX_COUNT,
+ channels->rx_count))) ||
+ (channels->max_tx &&
+ (nla_put_u32(skb, ETHTOOL_A_CHANNELS_TX_MAX,
+ channels->max_tx) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_TX_COUNT,
+ channels->tx_count))) ||
+ (channels->max_other &&
+ (nla_put_u32(skb, ETHTOOL_A_CHANNELS_OTHER_MAX,
+ channels->max_other) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_OTHER_COUNT,
+ channels->other_count))) ||
+ (channels->max_combined &&
+ (nla_put_u32(skb, ETHTOOL_A_CHANNELS_COMBINED_MAX,
+ channels->max_combined) ||
+ nla_put_u32(skb, ETHTOOL_A_CHANNELS_COMBINED_COUNT,
+ channels->combined_count))))
+ return -EMSGSIZE;
+
+ return 0;
+}
+
+const struct ethnl_request_ops ethnl_channels_request_ops = {
+ .request_cmd = ETHTOOL_MSG_CHANNELS_GET,
+ .reply_cmd = ETHTOOL_MSG_CHANNELS_GET_REPLY,
+ .hdr_attr = ETHTOOL_A_CHANNELS_HEADER,
+ .max_attr = ETHTOOL_A_CHANNELS_MAX,
+ .req_info_size = sizeof(struct channels_req_info),
+ .reply_data_size = sizeof(struct channels_reply_data),
+ .request_policy = channels_get_policy,
+
+ .prepare_data = channels_prepare_data,
+ .reply_size = channels_reply_size,
+ .fill_reply = channels_fill_reply,
+};
diff --git a/net/ethtool/netlink.c b/net/ethtool/netlink.c
index 653e009216cd..ac35513abeed 100644
--- a/net/ethtool/netlink.c
+++ b/net/ethtool/netlink.c
@@ -218,6 +218,7 @@ ethnl_default_requests[__ETHTOOL_MSG_USER_CNT] = {
[ETHTOOL_MSG_FEATURES_GET] = ðnl_features_request_ops,
[ETHTOOL_MSG_PRIVFLAGS_GET] = ðnl_privflags_request_ops,
[ETHTOOL_MSG_RINGS_GET] = ðnl_rings_request_ops,
+ [ETHTOOL_MSG_CHANNELS_GET] = ðnl_channels_request_ops,
};
static struct ethnl_dump_ctx *ethnl_dump_context(struct netlink_callback *cb)
@@ -763,6 +764,13 @@ static const struct genl_ops ethtool_genl_ops[] = {
.flags = GENL_UNS_ADMIN_PERM,
.doit = ethnl_set_rings,
},
+ {
+ .cmd = ETHTOOL_MSG_CHANNELS_GET,
+ .doit = ethnl_default_doit,
+ .start = ethnl_default_start,
+ .dumpit = ethnl_default_dumpit,
+ .done = ethnl_default_done,
+ },
};
static const struct genl_multicast_group ethtool_nl_mcgrps[] = {
diff --git a/net/ethtool/netlink.h b/net/ethtool/netlink.h
index b30426d01890..53bfe720ff1a 100644
--- a/net/ethtool/netlink.h
+++ b/net/ethtool/netlink.h
@@ -340,6 +340,7 @@ extern const struct ethnl_request_ops ethnl_wol_request_ops;
extern const struct ethnl_request_ops ethnl_features_request_ops;
extern const struct ethnl_request_ops ethnl_privflags_request_ops;
extern const struct ethnl_request_ops ethnl_rings_request_ops;
+extern const struct ethnl_request_ops ethnl_channels_request_ops;
int ethnl_set_linkinfo(struct sk_buff *skb, struct genl_info *info);
int ethnl_set_linkmodes(struct sk_buff *skb, struct genl_info *info);
--
2.25.1
On Thu, 12 Mar 2020 21:08:23 +0100 (CET) Michal Kubecek wrote:
> Implement RINGS_GET request to get ring sizes of a network device. These
> are traditionally available via ETHTOOL_GRINGPARAM ioctl request.
>
> Omit attributes for ring types which are not supported by driver or device
> (zero reported for maximum).
>
> v2: (all suggested by Jakub Kicinski)
> - minor cleanup in rings_prepare_data()
> - more descriptive rings_reply_size()
> - omit attributes with zero max size
>
> Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
On Thu, 12 Mar 2020 21:08:28 +0100 (CET) Michal Kubecek wrote:
> Implement RINGS_SET netlink request to set ring sizes of a network device.
> These are traditionally set with ETHTOOL_SRINGPARAM ioctl request.
>
> Like the ioctl implementation, the generic ethtool code checks if supplied
> values do not exceed driver defined limits; if they do, first offending
> attribute is reported using extack.
>
> v2:
> - fix netdev reference leak in error path (found by Jakub Kicinsky)
>
> Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
On Thu, 12 Mar 2020 21:08:38 +0100 (CET) Michal Kubecek wrote:
> Implement CHANNELS_GET request to get channel counts of a network device.
> These are traditionally available via ETHTOOL_GCHANNELS ioctl request.
>
> Omit attributes for channel types which are not supported by driver or
> device (zero reported for maximum).
>
> v2: (all suggested by Jakub Kicinski)
> - minor cleanup in channels_prepare_data()
> - more descriptive channels_reply_size()
> - omit attributes with zero max count
>
> Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
On Thu, 12 Mar 2020 21:08:43 +0100 (CET) Michal Kubecek wrote:
> Implement CHANNELS_SET netlink request to set channel counts of a network
> device. These are traditionally set with ETHTOOL_SCHANNELS ioctl request.
>
> Like the ioctl implementation, the generic ethtool code checks if supplied
> values do not exceed driver defined limits; if they do, first offending
> attribute is reported using extack. Checks preventing removing channels
> used for RX indirection table or zerocopy AF_XDP socket are also
> implemented.
>
> Move ethtool_get_max_rxfh_channel() helper into common.c so that it can be
> used by both ioctl and netlink code.
>
> v2:
> - fix netdev reference leak in error path (found by Jakub Kicinsky)
>
> Signed-off-by: Michal Kubecek <[email protected]>
Reviewed-by: Jakub Kicinski <[email protected]>
Thanks!
From: Michal Kubecek <[email protected]>
Date: Thu, 12 Mar 2020 21:07:33 +0100 (CET)
> Implementation of more netlink request types:
>
> - netdev features (ethtool -k/-K, patches 3-6)
> - private flags (--show-priv-flags / --set-priv-flags, patches 7-9)
> - ring sizes (ethtool -g/-G, patches 10-12)
> - channel counts (ethtool -l/-L, patches 13-15)
>
> Patch 1 is a style cleanup suggested in part 2 review and patch 2 updates
> the mapping between netdev features and legacy ioctl requests (which are
> still used by ethtool for backward compatibility).
>
> Changes in v2:
> - fix netdev reference leaks in error path of ethnl_set_rings() and
> ethnl_set_channels() (found by Jakub Kicinski)
> - use __set_bit() rather than set_bit() (suggested by David Miller)
> - in replies to RINGS_GET and CHANNELS_GET requests, omit ring and
> channel types not supported by driver/device (suggested by Jakub
> Kicinski)
> - more descriptive message size calculations in rings_reply_size() and
> channels_reply_size() (suggested by Jakub Kicinski)
> - coding style cleanup (suggested by Jakub Kicinski)
Series applied, thanks Michal.