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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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SPDX-License-Identifier: GPL-2.0-or-later/* * Copyright (c) 2016 Mellanox Technologies. All rights reserved. * Copyright (c) 2016 Jiri Pirko <jiri@mellanox.com> */
#include "devl_internal.h"
#define DEVLINK_PORT_FN_CAPS_VALID_MASK \ (_BITUL(__DEVLINK_PORT_FN_ATTR_CAPS_MAX) - 1)
static const struct nla_policy devlink_function_nl_policy[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1] = { [DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] = { .type = NLA_BINARY }, [DEVLINK_PORT_FN_ATTR_STATE] = NLA_POLICY_RANGE(NLA_U8, DEVLINK_PORT_FN_STATE_INACTIVE, DEVLINK_PORT_FN_STATE_ACTIVE), [DEVLINK_PORT_FN_ATTR_CAPS] = NLA_POLICY_BITFIELD32(DEVLINK_PORT_FN_CAPS_VALID_MASK), [DEVLINK_PORT_FN_ATTR_MAX_IO_EQS] = { .type = NLA_U32 },};
#define ASSERT_DEVLINK_PORT_REGISTERED(devlink_port) \ WARN_ON_ONCE(!(devlink_port)->registered)#define ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port) \ WARN_ON_ONCE((devlink_port)->registered)
struct devlink_port *devlink_port_get_by_index(struct devlink *devlink, unsigned int port_index){ return xa_load(&devlink->ports, port_index);}
struct devlink_port *devlink_port_get_from_attrs(struct devlink *devlink, struct nlattr **attrs){ if (attrs[DEVLINK_ATTR_PORT_INDEX]) { u32 port_index = nla_get_u32(attrs[DEVLINK_ATTR_PORT_INDEX]); struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index); if (!devlink_port) return ERR_PTR(-ENODEV); return devlink_port; } return ERR_PTR(-EINVAL);}
struct devlink_port *devlink_port_get_from_info(struct devlink *devlink, struct genl_info *info){ return devlink_port_get_from_attrs(devlink, info->attrs);}
static void devlink_port_fn_cap_fill(struct nla_bitfield32 *caps, u32 cap, bool is_enable){ caps->selector |= cap; if (is_enable) caps->value |= cap;}
static int devlink_port_fn_roce_fill(struct devlink_port *devlink_port, struct nla_bitfield32 *caps, struct netlink_ext_ack *extack){ bool is_enable; int err;
if (!devlink_port->ops->port_fn_roce_get) return 0;
err = devlink_port->ops->port_fn_roce_get(devlink_port, &is_enable, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; }
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_ROCE, is_enable); return 0;}
static int devlink_port_fn_migratable_fill(struct devlink_port *devlink_port, struct nla_bitfield32 *caps, struct netlink_ext_ack *extack){ bool is_enable; int err;
if (!devlink_port->ops->port_fn_migratable_get || devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) return 0;
err = devlink_port->ops->port_fn_migratable_get(devlink_port, &is_enable, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; }
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_MIGRATABLE, is_enable); return 0;}
static int devlink_port_fn_ipsec_crypto_fill(struct devlink_port *devlink_port, struct nla_bitfield32 *caps, struct netlink_ext_ack *extack){ bool is_enable; int err;
if (!devlink_port->ops->port_fn_ipsec_crypto_get || devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) return 0;
err = devlink_port->ops->port_fn_ipsec_crypto_get(devlink_port, &is_enable, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; }
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, is_enable); return 0;}
static int devlink_port_fn_ipsec_packet_fill(struct devlink_port *devlink_port, struct nla_bitfield32 *caps, struct netlink_ext_ack *extack){ bool is_enable; int err;
if (!devlink_port->ops->port_fn_ipsec_packet_get || devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) return 0;
err = devlink_port->ops->port_fn_ipsec_packet_get(devlink_port, &is_enable, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; }
devlink_port_fn_cap_fill(caps, DEVLINK_PORT_FN_CAP_IPSEC_PACKET, is_enable); return 0;}
static int devlink_port_fn_caps_fill(struct devlink_port *devlink_port, struct sk_buff *msg, struct netlink_ext_ack *extack, bool *msg_updated){ struct nla_bitfield32 caps = {}; int err;
err = devlink_port_fn_roce_fill(devlink_port, &caps, extack); if (err) return err;
err = devlink_port_fn_migratable_fill(devlink_port, &caps, extack); if (err) return err;
err = devlink_port_fn_ipsec_crypto_fill(devlink_port, &caps, extack); if (err) return err;
err = devlink_port_fn_ipsec_packet_fill(devlink_port, &caps, extack); if (err) return err;
if (!caps.selector) return 0; err = nla_put_bitfield32(msg, DEVLINK_PORT_FN_ATTR_CAPS, caps.value, caps.selector); if (err) return err;
*msg_updated = true; return 0;}
static int devlink_port_fn_max_io_eqs_fill(struct devlink_port *port, struct sk_buff *msg, struct netlink_ext_ack *extack, bool *msg_updated){ u32 max_io_eqs; int err;
if (!port->ops->port_fn_max_io_eqs_get) return 0;
err = port->ops->port_fn_max_io_eqs_get(port, &max_io_eqs, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; } err = nla_put_u32(msg, DEVLINK_PORT_FN_ATTR_MAX_IO_EQS, max_io_eqs); if (err) return err; *msg_updated = true; return 0;}
int devlink_nl_port_handle_fill(struct sk_buff *msg, struct devlink_port *devlink_port){ if (devlink_nl_put_handle(msg, devlink_port->devlink)) return -EMSGSIZE; if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) return -EMSGSIZE; return 0;}
size_t devlink_nl_port_handle_size(struct devlink_port *devlink_port){ struct devlink *devlink = devlink_port->devlink;
return nla_total_size(strlen(devlink_bus_name(devlink)) + 1) /* DEVLINK_ATTR_BUS_NAME */ + nla_total_size(strlen(devlink_dev_name(devlink)) + 1) /* DEVLINK_ATTR_DEV_NAME */ + nla_total_size(8) /* DEVLINK_ATTR_INDEX */ + nla_total_size(4); /* DEVLINK_ATTR_PORT_INDEX */}
static int devlink_nl_port_attrs_put(struct sk_buff *msg, struct devlink_port *devlink_port){ struct devlink_port_attrs *attrs = &devlink_port->attrs;
if (!devlink_port->attrs_set) return 0; if (attrs->lanes) { if (nla_put_u32(msg, DEVLINK_ATTR_PORT_LANES, attrs->lanes)) return -EMSGSIZE; } if (nla_put_u8(msg, DEVLINK_ATTR_PORT_SPLITTABLE, attrs->splittable)) return -EMSGSIZE; if (nla_put_u16(msg, DEVLINK_ATTR_PORT_FLAVOUR, attrs->flavour)) return -EMSGSIZE; switch (devlink_port->attrs.flavour) { case DEVLINK_PORT_FLAVOUR_PCI_PF: if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, attrs->pci_pf.controller) || nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_pf.pf)) return -EMSGSIZE; if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_pf.external)) return -EMSGSIZE; break; case DEVLINK_PORT_FLAVOUR_PCI_VF: if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, attrs->pci_vf.controller) || nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_vf.pf) || nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_VF_NUMBER, attrs->pci_vf.vf)) return -EMSGSIZE; if (nla_put_u8(msg, DEVLINK_ATTR_PORT_EXTERNAL, attrs->pci_vf.external)) return -EMSGSIZE; break; case DEVLINK_PORT_FLAVOUR_PCI_SF: if (nla_put_u32(msg, DEVLINK_ATTR_PORT_CONTROLLER_NUMBER, attrs->pci_sf.controller) || nla_put_u16(msg, DEVLINK_ATTR_PORT_PCI_PF_NUMBER, attrs->pci_sf.pf) || nla_put_u32(msg, DEVLINK_ATTR_PORT_PCI_SF_NUMBER, attrs->pci_sf.sf)) return -EMSGSIZE; break; case DEVLINK_PORT_FLAVOUR_PHYSICAL: case DEVLINK_PORT_FLAVOUR_CPU: case DEVLINK_PORT_FLAVOUR_DSA: if (nla_put_u32(msg, DEVLINK_ATTR_PORT_NUMBER, attrs->phys.port_number)) return -EMSGSIZE; if (!attrs->split) return 0; if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_GROUP, attrs->phys.port_number)) return -EMSGSIZE; if (nla_put_u32(msg, DEVLINK_ATTR_PORT_SPLIT_SUBPORT_NUMBER, attrs->phys.split_subport_number)) return -EMSGSIZE; break; default: break; } return 0;}
static int devlink_port_fn_hw_addr_fill(struct devlink_port *port, struct sk_buff *msg, struct netlink_ext_ack *extack, bool *msg_updated){ u8 hw_addr[MAX_ADDR_LEN]; int hw_addr_len; int err;
if (!port->ops->port_fn_hw_addr_get) return 0;
err = port->ops->port_fn_hw_addr_get(port, hw_addr, &hw_addr_len, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; } err = nla_put(msg, DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR, hw_addr_len, hw_addr); if (err) return err; *msg_updated = true; return 0;}
static booldevlink_port_fn_state_valid(enum devlink_port_fn_state state){ return state == DEVLINK_PORT_FN_STATE_INACTIVE || state == DEVLINK_PORT_FN_STATE_ACTIVE;}
static booldevlink_port_fn_opstate_valid(enum devlink_port_fn_opstate opstate){ return opstate == DEVLINK_PORT_FN_OPSTATE_DETACHED || opstate == DEVLINK_PORT_FN_OPSTATE_ATTACHED;}
static int devlink_port_fn_state_fill(struct devlink_port *port, struct sk_buff *msg, struct netlink_ext_ack *extack, bool *msg_updated){ enum devlink_port_fn_opstate opstate; enum devlink_port_fn_state state; int err;
if (!port->ops->port_fn_state_get) return 0;
err = port->ops->port_fn_state_get(port, &state, &opstate, extack); if (err) { if (err == -EOPNOTSUPP) return 0; return err; } if (!devlink_port_fn_state_valid(state)) { WARN_ON_ONCE(1); NL_SET_ERR_MSG(extack, "Invalid state read from driver"); return -EINVAL; } if (!devlink_port_fn_opstate_valid(opstate)) { WARN_ON_ONCE(1); NL_SET_ERR_MSG(extack, "Invalid operational state read from driver"); return -EINVAL; } if (nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_STATE, state) || nla_put_u8(msg, DEVLINK_PORT_FN_ATTR_OPSTATE, opstate)) return -EMSGSIZE; *msg_updated = true; return 0;}
static intdevlink_port_fn_mig_set(struct devlink_port *devlink_port, bool enable, struct netlink_ext_ack *extack){ return devlink_port->ops->port_fn_migratable_set(devlink_port, enable, extack);}
static intdevlink_port_fn_roce_set(struct devlink_port *devlink_port, bool enable, struct netlink_ext_ack *extack){ return devlink_port->ops->port_fn_roce_set(devlink_port, enable, extack);}
static intdevlink_port_fn_ipsec_crypto_set(struct devlink_port *devlink_port, bool enable, struct netlink_ext_ack *extack){ return devlink_port->ops->port_fn_ipsec_crypto_set(devlink_port, enable, extack);}
static intdevlink_port_fn_ipsec_packet_set(struct devlink_port *devlink_port, bool enable, struct netlink_ext_ack *extack){ return devlink_port->ops->port_fn_ipsec_packet_set(devlink_port, enable, extack);}
static int devlink_port_fn_caps_set(struct devlink_port *devlink_port, const struct nlattr *attr, struct netlink_ext_ack *extack){ struct nla_bitfield32 caps; u32 caps_value; int err;
caps = nla_get_bitfield32(attr); caps_value = caps.value & caps.selector; if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE) { err = devlink_port_fn_roce_set(devlink_port, caps_value & DEVLINK_PORT_FN_CAP_ROCE, extack); if (err) return err; } if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { err = devlink_port_fn_mig_set(devlink_port, caps_value & DEVLINK_PORT_FN_CAP_MIGRATABLE, extack); if (err) return err; } if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { err = devlink_port_fn_ipsec_crypto_set(devlink_port, caps_value & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO, extack); if (err) return err; } if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { err = devlink_port_fn_ipsec_packet_set(devlink_port, caps_value & DEVLINK_PORT_FN_CAP_IPSEC_PACKET, extack); if (err) return err; } return 0;}
static intdevlink_port_fn_max_io_eqs_set(struct devlink_port *devlink_port, const struct nlattr *attr, struct netlink_ext_ack *extack){ u32 max_io_eqs;
max_io_eqs = nla_get_u32(attr); return devlink_port->ops->port_fn_max_io_eqs_set(devlink_port, max_io_eqs, extack);}
static intdevlink_nl_port_function_attrs_put(struct sk_buff *msg, struct devlink_port *port, struct netlink_ext_ack *extack){ struct nlattr *function_attr; bool msg_updated = false; int err;
function_attr = nla_nest_start_noflag(msg, DEVLINK_ATTR_PORT_FUNCTION); if (!function_attr) return -EMSGSIZE;
err = devlink_port_fn_hw_addr_fill(port, msg, extack, &msg_updated); if (err) goto out; err = devlink_port_fn_caps_fill(port, msg, extack, &msg_updated); if (err) goto out; err = devlink_port_fn_state_fill(port, msg, extack, &msg_updated); if (err) goto out; err = devlink_port_fn_max_io_eqs_fill(port, msg, extack, &msg_updated); if (err) goto out; err = devlink_rel_devlink_handle_put(msg, port->devlink, port->rel_index, DEVLINK_PORT_FN_ATTR_DEVLINK, &msg_updated);
out: if (err || !msg_updated) nla_nest_cancel(msg, function_attr); else nla_nest_end(msg, function_attr); return err;}
static int devlink_nl_port_fill(struct sk_buff *msg, struct devlink_port *devlink_port, enum devlink_command cmd, u32 portid, u32 seq, int flags, struct netlink_ext_ack *extack){ struct devlink *devlink = devlink_port->devlink; void *hdr;
hdr = genlmsg_put(msg, portid, seq, &devlink_nl_family, flags, cmd); if (!hdr) return -EMSGSIZE;
if (devlink_nl_put_handle(msg, devlink)) goto nla_put_failure; if (nla_put_u32(msg, DEVLINK_ATTR_PORT_INDEX, devlink_port->index)) goto nla_put_failure;
spin_lock_bh(&devlink_port->type_lock); if (nla_put_u16(msg, DEVLINK_ATTR_PORT_TYPE, devlink_port->type)) goto nla_put_failure_type_locked; if (devlink_port->desired_type != DEVLINK_PORT_TYPE_NOTSET && nla_put_u16(msg, DEVLINK_ATTR_PORT_DESIRED_TYPE, devlink_port->desired_type)) goto nla_put_failure_type_locked; if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) { if (devlink_port->type_eth.netdev && (nla_put_u32(msg, DEVLINK_ATTR_PORT_NETDEV_IFINDEX, devlink_port->type_eth.ifindex) || nla_put_string(msg, DEVLINK_ATTR_PORT_NETDEV_NAME, devlink_port->type_eth.ifname))) goto nla_put_failure_type_locked; } if (devlink_port->type == DEVLINK_PORT_TYPE_IB) { struct ib_device *ibdev = devlink_port->type_ib.ibdev;
if (ibdev && nla_put_string(msg, DEVLINK_ATTR_PORT_IBDEV_NAME, ibdev->name)) goto nla_put_failure_type_locked; } spin_unlock_bh(&devlink_port->type_lock); if (devlink_nl_port_attrs_put(msg, devlink_port)) goto nla_put_failure; if (devlink_nl_port_function_attrs_put(msg, devlink_port, extack)) goto nla_put_failure; if (devlink_port->linecard && nla_put_u32(msg, DEVLINK_ATTR_LINECARD_INDEX, devlink_linecard_index(devlink_port->linecard))) goto nla_put_failure;
genlmsg_end(msg, hdr); return 0;
nla_put_failure_type_locked: spin_unlock_bh(&devlink_port->type_lock);nla_put_failure: genlmsg_cancel(msg, hdr); return -EMSGSIZE;}
static void devlink_port_notify(struct devlink_port *devlink_port, enum devlink_command cmd){ struct devlink *devlink = devlink_port->devlink; struct devlink_obj_desc desc; struct sk_buff *msg; int err;
WARN_ON(cmd != DEVLINK_CMD_PORT_NEW && cmd != DEVLINK_CMD_PORT_DEL);
if (!__devl_is_registered(devlink) || !devlink_nl_notify_need(devlink)) return;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return;
err = devlink_nl_port_fill(msg, devlink_port, cmd, 0, 0, 0, NULL); if (err) { nlmsg_free(msg); return; }
devlink_nl_obj_desc_init(&desc, devlink); devlink_nl_obj_desc_port_set(&desc, devlink_port); devlink_nl_notify_send_desc(devlink, msg, &desc);}
static void devlink_ports_notify(struct devlink *devlink, enum devlink_command cmd){ struct devlink_port *devlink_port; unsigned long port_index;
xa_for_each(&devlink->ports, port_index, devlink_port) devlink_port_notify(devlink_port, cmd);}
void devlink_ports_notify_register(struct devlink *devlink){ devlink_ports_notify(devlink, DEVLINK_CMD_PORT_NEW);}
void devlink_ports_notify_unregister(struct devlink *devlink){ devlink_ports_notify(devlink, DEVLINK_CMD_PORT_DEL);}
int devlink_nl_port_get_doit(struct sk_buff *skb, struct genl_info *info){ struct devlink_port *devlink_port = info->user_ptr[1]; struct sk_buff *msg; int err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) return -ENOMEM;
err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, info->snd_portid, info->snd_seq, 0, info->extack); if (err) { nlmsg_free(msg); return err; }
return genlmsg_reply(msg, info);}
static intdevlink_nl_port_get_dump_one(struct sk_buff *msg, struct devlink *devlink, struct netlink_callback *cb, int flags){ struct devlink_nl_dump_state *state = devlink_dump_state(cb); struct devlink_port *devlink_port; unsigned long port_index; int err = 0;
xa_for_each_start(&devlink->ports, port_index, devlink_port, state->idx) { err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, NETLINK_CB(cb->skb).portid, cb->nlh->nlmsg_seq, flags, cb->extack); if (err) { state->idx = port_index; break; } }
return err;}
int devlink_nl_port_get_dumpit(struct sk_buff *skb, struct netlink_callback *cb){ return devlink_nl_dumpit(skb, cb, devlink_nl_port_get_dump_one);}
static int devlink_port_type_set(struct devlink_port *devlink_port, enum devlink_port_type port_type)
{ int err;
if (!devlink_port->ops->port_type_set) return -EOPNOTSUPP;
if (port_type == devlink_port->type) return 0;
err = devlink_port->ops->port_type_set(devlink_port, port_type); if (err) return err;
devlink_port->desired_type = port_type; devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); return 0;}
static int devlink_port_function_hw_addr_set(struct devlink_port *port, const struct nlattr *attr, struct netlink_ext_ack *extack){ const u8 *hw_addr; int hw_addr_len;
hw_addr = nla_data(attr); hw_addr_len = nla_len(attr); if (hw_addr_len > MAX_ADDR_LEN) { NL_SET_ERR_MSG(extack, "Port function hardware address too long"); return -EINVAL; } if (port->type == DEVLINK_PORT_TYPE_ETH) { if (hw_addr_len != ETH_ALEN) { NL_SET_ERR_MSG(extack, "Address must be 6 bytes for Ethernet device"); return -EINVAL; } if (!is_unicast_ether_addr(hw_addr)) { NL_SET_ERR_MSG(extack, "Non-unicast hardware address unsupported"); return -EINVAL; } }
return port->ops->port_fn_hw_addr_set(port, hw_addr, hw_addr_len, extack);}
static int devlink_port_fn_state_set(struct devlink_port *port, const struct nlattr *attr, struct netlink_ext_ack *extack){ enum devlink_port_fn_state state;
state = nla_get_u8(attr); return port->ops->port_fn_state_set(port, state, extack);}
static int devlink_port_function_validate(struct devlink_port *devlink_port, struct nlattr **tb, struct netlink_ext_ack *extack){ const struct devlink_port_ops *ops = devlink_port->ops; struct nlattr *attr;
if (tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR] && !ops->port_fn_hw_addr_set) { NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR], "Port doesn't support function attributes"); return -EOPNOTSUPP; } if (tb[DEVLINK_PORT_FN_ATTR_STATE] && !ops->port_fn_state_set) { NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_STATE], "Function does not support state setting"); return -EOPNOTSUPP; } attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; if (attr) { struct nla_bitfield32 caps;
caps = nla_get_bitfield32(attr); if (caps.selector & DEVLINK_PORT_FN_CAP_ROCE && !ops->port_fn_roce_set) { NL_SET_ERR_MSG_ATTR(extack, attr, "Port doesn't support RoCE function attribute"); return -EOPNOTSUPP; } if (caps.selector & DEVLINK_PORT_FN_CAP_MIGRATABLE) { if (!ops->port_fn_migratable_set) { NL_SET_ERR_MSG_ATTR(extack, attr, "Port doesn't support migratable function attribute"); return -EOPNOTSUPP; } if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { NL_SET_ERR_MSG_ATTR(extack, attr, "migratable function attribute supported for VFs only"); return -EOPNOTSUPP; } } if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_CRYPTO) { if (!ops->port_fn_ipsec_crypto_set) { NL_SET_ERR_MSG_ATTR(extack, attr, "Port doesn't support ipsec_crypto function attribute"); return -EOPNOTSUPP; } if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { NL_SET_ERR_MSG_ATTR(extack, attr, "ipsec_crypto function attribute supported for VFs only"); return -EOPNOTSUPP; } } if (caps.selector & DEVLINK_PORT_FN_CAP_IPSEC_PACKET) { if (!ops->port_fn_ipsec_packet_set) { NL_SET_ERR_MSG_ATTR(extack, attr, "Port doesn't support ipsec_packet function attribute"); return -EOPNOTSUPP; } if (devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_VF) { NL_SET_ERR_MSG_ATTR(extack, attr, "ipsec_packet function attribute supported for VFs only"); return -EOPNOTSUPP; } } } if (tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS] && !ops->port_fn_max_io_eqs_set) { NL_SET_ERR_MSG_ATTR(extack, tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS], "Function does not support max_io_eqs setting"); return -EOPNOTSUPP; } return 0;}
static int devlink_port_function_set(struct devlink_port *port, const struct nlattr *attr, struct netlink_ext_ack *extack){ struct nlattr *tb[DEVLINK_PORT_FUNCTION_ATTR_MAX + 1]; int err;
err = nla_parse_nested(tb, DEVLINK_PORT_FUNCTION_ATTR_MAX, attr, devlink_function_nl_policy, extack); if (err < 0) { NL_SET_ERR_MSG(extack, "Fail to parse port function attributes"); return err; }
err = devlink_port_function_validate(port, tb, extack); if (err) return err;
attr = tb[DEVLINK_PORT_FUNCTION_ATTR_HW_ADDR]; if (attr) { err = devlink_port_function_hw_addr_set(port, attr, extack); if (err) return err; }
attr = tb[DEVLINK_PORT_FN_ATTR_CAPS]; if (attr) { err = devlink_port_fn_caps_set(port, attr, extack); if (err) return err; }
attr = tb[DEVLINK_PORT_FN_ATTR_MAX_IO_EQS]; if (attr) { err = devlink_port_fn_max_io_eqs_set(port, attr, extack); if (err) return err; }
/* Keep this as the last function attribute set, so that when * multiple port function attributes are set along with state, * Those can be applied first before activating the state. */ attr = tb[DEVLINK_PORT_FN_ATTR_STATE]; if (attr) err = devlink_port_fn_state_set(port, attr, extack);
if (!err) devlink_port_notify(port, DEVLINK_CMD_PORT_NEW); return err;}
int devlink_nl_port_set_doit(struct sk_buff *skb, struct genl_info *info){ struct devlink_port *devlink_port = info->user_ptr[1]; int err;
if (info->attrs[DEVLINK_ATTR_PORT_TYPE]) { enum devlink_port_type port_type;
port_type = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_TYPE]); err = devlink_port_type_set(devlink_port, port_type); if (err) return err; }
if (info->attrs[DEVLINK_ATTR_PORT_FUNCTION]) { struct nlattr *attr = info->attrs[DEVLINK_ATTR_PORT_FUNCTION]; struct netlink_ext_ack *extack = info->extack;
err = devlink_port_function_set(devlink_port, attr, extack); if (err) return err; }
return 0;}
int devlink_nl_port_split_doit(struct sk_buff *skb, struct genl_info *info){ struct devlink_port *devlink_port = info->user_ptr[1]; struct devlink *devlink = info->user_ptr[0]; u32 count;
if (GENL_REQ_ATTR_CHECK(info, DEVLINK_ATTR_PORT_SPLIT_COUNT)) return -EINVAL; if (!devlink_port->ops->port_split) return -EOPNOTSUPP;
count = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_SPLIT_COUNT]);
if (!devlink_port->attrs.splittable) { /* Split ports cannot be split. */ if (devlink_port->attrs.split) NL_SET_ERR_MSG(info->extack, "Port cannot be split further"); else NL_SET_ERR_MSG(info->extack, "Port cannot be split"); return -EINVAL; }
if (count < 2 || !is_power_of_2(count) || count > devlink_port->attrs.lanes) { NL_SET_ERR_MSG(info->extack, "Invalid split count"); return -EINVAL; }
return devlink_port->ops->port_split(devlink, devlink_port, count, info->extack);}
int devlink_nl_port_unsplit_doit(struct sk_buff *skb, struct genl_info *info){ struct devlink_port *devlink_port = info->user_ptr[1]; struct devlink *devlink = info->user_ptr[0];
if (!devlink_port->ops->port_unsplit) return -EOPNOTSUPP; return devlink_port->ops->port_unsplit(devlink, devlink_port, info->extack);}
int devlink_nl_port_new_doit(struct sk_buff *skb, struct genl_info *info){ struct netlink_ext_ack *extack = info->extack; struct devlink_port_new_attrs new_attrs = {}; struct devlink *devlink = info->user_ptr[0]; struct devlink_port *devlink_port; struct sk_buff *msg; int err;
if (!devlink->ops->port_new) return -EOPNOTSUPP;
if (!info->attrs[DEVLINK_ATTR_PORT_FLAVOUR] || !info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]) { NL_SET_ERR_MSG(extack, "Port flavour or PCI PF are not specified"); return -EINVAL; } new_attrs.flavour = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_FLAVOUR]); new_attrs.pfnum = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_PCI_PF_NUMBER]);
if (info->attrs[DEVLINK_ATTR_PORT_INDEX]) { /* Port index of the new port being created by driver. */ new_attrs.port_index = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_INDEX]); new_attrs.port_index_valid = true; } if (info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]) { new_attrs.controller = nla_get_u16(info->attrs[DEVLINK_ATTR_PORT_CONTROLLER_NUMBER]); new_attrs.controller_valid = true; } if (new_attrs.flavour == DEVLINK_PORT_FLAVOUR_PCI_SF && info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]) { new_attrs.sfnum = nla_get_u32(info->attrs[DEVLINK_ATTR_PORT_PCI_SF_NUMBER]); new_attrs.sfnum_valid = true; }
err = devlink->ops->port_new(devlink, &new_attrs, extack, &devlink_port); if (err) return err;
msg = nlmsg_new(NLMSG_DEFAULT_SIZE, GFP_KERNEL); if (!msg) { err = -ENOMEM; goto err_out_port_del; } err = devlink_nl_port_fill(msg, devlink_port, DEVLINK_CMD_PORT_NEW, info->snd_portid, info->snd_seq, 0, NULL); if (WARN_ON_ONCE(err)) goto err_out_msg_free; err = genlmsg_reply(msg, info); if (err) goto err_out_port_del; return 0;
err_out_msg_free: nlmsg_free(msg);err_out_port_del: devlink_port->ops->port_del(devlink, devlink_port, NULL); return err;}
int devlink_nl_port_del_doit(struct sk_buff *skb, struct genl_info *info){ struct devlink_port *devlink_port = info->user_ptr[1]; struct netlink_ext_ack *extack = info->extack; struct devlink *devlink = info->user_ptr[0];
if (!devlink_port->ops->port_del) return -EOPNOTSUPP;
return devlink_port->ops->port_del(devlink, devlink_port, extack);}
static void devlink_port_type_warn(struct work_struct *work){ struct devlink_port *port = container_of(to_delayed_work(work), struct devlink_port, type_warn_dw); devl_warn(port->devlink, "Type was not set for devlink port.");}
static bool devlink_port_type_should_warn(struct devlink_port *devlink_port){ /* Ignore CPU and DSA flavours. */ return devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_CPU && devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_DSA && devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_UNUSED;}
#define DEVLINK_PORT_TYPE_WARN_TIMEOUT (HZ * 3600)
static void devlink_port_type_warn_schedule(struct devlink_port *devlink_port){ if (!devlink_port_type_should_warn(devlink_port)) return; /* Schedule a work to WARN in case driver does not set port * type within timeout. */ schedule_delayed_work(&devlink_port->type_warn_dw, DEVLINK_PORT_TYPE_WARN_TIMEOUT);}
static void devlink_port_type_warn_cancel(struct devlink_port *devlink_port){ if (!devlink_port_type_should_warn(devlink_port)) return; cancel_delayed_work_sync(&devlink_port->type_warn_dw);}
/** * devlink_port_init() - Init devlink port * * @devlink: devlink * @devlink_port: devlink port * * Initialize essential stuff that is needed for functions * that may be called before devlink port registration. * Call to this function is optional and not needed * in case the driver does not use such functions. */void devlink_port_init(struct devlink *devlink, struct devlink_port *devlink_port){ if (devlink_port->initialized) return; devlink_port->devlink = devlink; INIT_LIST_HEAD(&devlink_port->region_list); INIT_LIST_HEAD(&devlink_port->resource_list); devlink_port->initialized = true;}EXPORT_SYMBOL_GPL(devlink_port_init);
/** * devlink_port_fini() - Deinitialize devlink port * * @devlink_port: devlink port * * Deinitialize essential stuff that is in use for functions * that may be called after devlink port unregistration. * Call to this function is optional and not needed * in case the driver does not use such functions. */void devlink_port_fini(struct devlink_port *devlink_port){ WARN_ON(!list_empty(&devlink_port->region_list)); WARN_ON(!list_empty(&devlink_port->resource_list));}EXPORT_SYMBOL_GPL(devlink_port_fini);
static const struct devlink_port_ops devlink_port_dummy_ops = {};
/** * devl_port_register_with_ops() - Register devlink port * * @devlink: devlink * @devlink_port: devlink port * @port_index: driver-specific numerical identifier of the port * @ops: port ops * * Register devlink port with provided port index. User can use * any indexing, even hw-related one. devlink_port structure * is convenient to be embedded inside user driver private structure. * Note that the caller should take care of zeroing the devlink_port * structure. */int devl_port_register_with_ops(struct devlink *devlink, struct devlink_port *devlink_port, unsigned int port_index, const struct devlink_port_ops *ops){ int err;
devl_assert_locked(devlink);
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
devlink_port_init(devlink, devlink_port); devlink_port->registered = true; devlink_port->index = port_index; devlink_port->ops = ops ? ops : &devlink_port_dummy_ops; spin_lock_init(&devlink_port->type_lock); INIT_LIST_HEAD(&devlink_port->reporter_list); err = xa_insert(&devlink->ports, port_index, devlink_port, GFP_KERNEL); if (err) { devlink_port->registered = false; return err; }
INIT_DELAYED_WORK(&devlink_port->type_warn_dw, &devlink_port_type_warn); devlink_port_type_warn_schedule(devlink_port); devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW); return 0;}EXPORT_SYMBOL_GPL(devl_port_register_with_ops);
/** * devlink_port_register_with_ops - Register devlink port * * @devlink: devlink * @devlink_port: devlink port * @port_index: driver-specific numerical identifier of the port * @ops: port ops * * Register devlink port with provided port index. User can use * any indexing, even hw-related one. devlink_port structure * is convenient to be embedded inside user driver private structure. * Note that the caller should take care of zeroing the devlink_port * structure. * * Context: Takes and release devlink->lock <mutex>. */int devlink_port_register_with_ops(struct devlink *devlink, struct devlink_port *devlink_port, unsigned int port_index, const struct devlink_port_ops *ops){ int err;
devl_lock(devlink); err = devl_port_register_with_ops(devlink, devlink_port, port_index, ops); devl_unlock(devlink); return err;}EXPORT_SYMBOL_GPL(devlink_port_register_with_ops);
/** * devl_port_unregister() - Unregister devlink port * * @devlink_port: devlink port */void devl_port_unregister(struct devlink_port *devlink_port){ lockdep_assert_held(&devlink_port->devlink->lock); WARN_ON(devlink_port->type != DEVLINK_PORT_TYPE_NOTSET);
devlink_port_type_warn_cancel(devlink_port); devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_DEL); xa_erase(&devlink_port->devlink->ports, devlink_port->index); WARN_ON(!list_empty(&devlink_port->reporter_list)); devlink_port->registered = false;}EXPORT_SYMBOL_GPL(devl_port_unregister);
/** * devlink_port_unregister - Unregister devlink port * * @devlink_port: devlink port * * Context: Takes and release devlink->lock <mutex>. */void devlink_port_unregister(struct devlink_port *devlink_port){ struct devlink *devlink = devlink_port->devlink;
devl_lock(devlink); devl_port_unregister(devlink_port); devl_unlock(devlink);}EXPORT_SYMBOL_GPL(devlink_port_unregister);
static void devlink_port_type_netdev_checks(struct devlink_port *devlink_port, struct net_device *netdev){ const struct net_device_ops *ops = netdev->netdev_ops;
/* If driver registers devlink port, it should set devlink port * attributes accordingly so the compat functions are called * and the original ops are not used. */ if (ops->ndo_get_phys_port_name) { /* Some drivers use the same set of ndos for netdevs * that have devlink_port registered and also for * those who don't. Make sure that ndo_get_phys_port_name * returns -EOPNOTSUPP here in case it is defined. * Warn if not. */ char name[IFNAMSIZ]; int err;
err = ops->ndo_get_phys_port_name(netdev, name, sizeof(name)); WARN_ON(err != -EOPNOTSUPP); } if (ops->ndo_get_port_parent_id) { /* Some drivers use the same set of ndos for netdevs * that have devlink_port registered and also for * those who don't. Make sure that ndo_get_port_parent_id * returns -EOPNOTSUPP here in case it is defined. * Warn if not. */ struct netdev_phys_item_id ppid; int err;
err = ops->ndo_get_port_parent_id(netdev, &ppid); WARN_ON(err != -EOPNOTSUPP); }}
static void __devlink_port_type_set(struct devlink_port *devlink_port, enum devlink_port_type type, void *type_dev){ struct net_device *netdev = type_dev;
ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
if (type == DEVLINK_PORT_TYPE_NOTSET) { devlink_port_type_warn_schedule(devlink_port); } else { devlink_port_type_warn_cancel(devlink_port); if (type == DEVLINK_PORT_TYPE_ETH && netdev) devlink_port_type_netdev_checks(devlink_port, netdev); }
spin_lock_bh(&devlink_port->type_lock); devlink_port->type = type; switch (type) { case DEVLINK_PORT_TYPE_ETH: devlink_port->type_eth.netdev = netdev; if (netdev) { ASSERT_RTNL(); devlink_port->type_eth.ifindex = netdev->ifindex; BUILD_BUG_ON(sizeof(devlink_port->type_eth.ifname) != sizeof(netdev->name)); strcpy(devlink_port->type_eth.ifname, netdev->name); } break; case DEVLINK_PORT_TYPE_IB: devlink_port->type_ib.ibdev = type_dev; break; default: break; } spin_unlock_bh(&devlink_port->type_lock); devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);}
/** * devlink_port_type_eth_set - Set port type to Ethernet * * @devlink_port: devlink port * * If driver is calling this, most likely it is doing something wrong. */void devlink_port_type_eth_set(struct devlink_port *devlink_port){ devl_warn(devlink_port->devlink, "devlink port type for port %d set to Ethernet without a software interface reference, device type not supported by the kernel?\n", devlink_port->index); __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL);}EXPORT_SYMBOL_GPL(devlink_port_type_eth_set);
/** * devlink_port_type_ib_set - Set port type to InfiniBand * * @devlink_port: devlink port * @ibdev: related IB device */void devlink_port_type_ib_set(struct devlink_port *devlink_port, struct ib_device *ibdev){ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_IB, ibdev);}EXPORT_SYMBOL_GPL(devlink_port_type_ib_set);
/** * devlink_port_type_clear - Clear port type * * @devlink_port: devlink port * * If driver is calling this for clearing Ethernet type, most likely * it is doing something wrong. */void devlink_port_type_clear(struct devlink_port *devlink_port){ if (devlink_port->type == DEVLINK_PORT_TYPE_ETH) devl_warn(devlink_port->devlink, "devlink port type for port %d cleared without a software interface reference, device type not supported by the kernel?\n", devlink_port->index); __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL);}EXPORT_SYMBOL_GPL(devlink_port_type_clear);
int devlink_port_netdevice_event(struct notifier_block *nb, unsigned long event, void *ptr){ struct net_device *netdev = netdev_notifier_info_to_dev(ptr); struct devlink_port *devlink_port = netdev->devlink_port; struct devlink *devlink;
if (!devlink_port) return NOTIFY_OK; devlink = devlink_port->devlink;
switch (event) { case NETDEV_POST_INIT: /* Set the type but not netdev pointer. It is going to be set * later on by NETDEV_REGISTER event. Happens once during * netdevice register */ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_ETH, NULL); break; case NETDEV_REGISTER: case NETDEV_CHANGENAME: if (devlink_net(devlink) != dev_net(netdev)) return NOTIFY_OK; /* Set the netdev on top of previously set type. Note this * event happens also during net namespace change so here * we take into account netdev pointer appearing in this * namespace. */ __devlink_port_type_set(devlink_port, devlink_port->type, netdev); break; case NETDEV_UNREGISTER: if (devlink_net(devlink) != dev_net(netdev)) return NOTIFY_OK; /* Clear netdev pointer, but not the type. This event happens * also during net namespace change so we need to clear * pointer to netdev that is going to another net namespace. */ __devlink_port_type_set(devlink_port, devlink_port->type, NULL); break; case NETDEV_PRE_UNINIT: /* Clear the type and the netdev pointer. Happens one during * netdevice unregister. */ __devlink_port_type_set(devlink_port, DEVLINK_PORT_TYPE_NOTSET, NULL); break; }
return NOTIFY_OK;}
static void __devlink_port_attrs_set(struct devlink_port *devlink_port, enum devlink_port_flavour flavour){ struct devlink_port_attrs *attrs = &devlink_port->attrs;
devlink_port->attrs_set = true; attrs->flavour = flavour; if (attrs->switch_id.id_len) { devlink_port->switch_port = true; if (WARN_ON(attrs->switch_id.id_len > MAX_PHYS_ITEM_ID_LEN)) attrs->switch_id.id_len = MAX_PHYS_ITEM_ID_LEN; } else { devlink_port->switch_port = false; }}
/** * devlink_port_attrs_set - Set port attributes * * @devlink_port: devlink port * @attrs: devlink port attrs */void devlink_port_attrs_set(struct devlink_port *devlink_port, const struct devlink_port_attrs *attrs){ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port); WARN_ON(attrs->splittable && attrs->split);
devlink_port->attrs = *attrs; __devlink_port_attrs_set(devlink_port, attrs->flavour);}EXPORT_SYMBOL_GPL(devlink_port_attrs_set);
/** * devlink_port_attrs_pci_pf_set - Set PCI PF port attributes * * @devlink_port: devlink port * @controller: associated controller number for the devlink port instance * @pf: associated PCI function number for the devlink port instance * @external: indicates if the port is for an external controller */void devlink_port_attrs_pci_pf_set(struct devlink_port *devlink_port, u32 controller, u16 pf, bool external){ struct devlink_port_attrs *attrs = &devlink_port->attrs;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
__devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_PF); attrs->pci_pf.controller = controller; attrs->pci_pf.pf = pf; attrs->pci_pf.external = external;}EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_pf_set);
/** * devlink_port_attrs_pci_vf_set - Set PCI VF port attributes * * @devlink_port: devlink port * @controller: associated controller number for the devlink port instance * @pf: associated PCI function number for the devlink port instance * @vf: associated PCI VF number of a PF for the devlink port instance; * VF number starts from 0 for the first PCI virtual function * @external: indicates if the port is for an external controller */void devlink_port_attrs_pci_vf_set(struct devlink_port *devlink_port, u32 controller, u16 pf, u16 vf, bool external){ struct devlink_port_attrs *attrs = &devlink_port->attrs;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
__devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_VF); attrs->pci_vf.controller = controller; attrs->pci_vf.pf = pf; attrs->pci_vf.vf = vf; attrs->pci_vf.external = external;}EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_vf_set);
/** * devlink_port_attrs_pci_sf_set - Set PCI SF port attributes * * @devlink_port: devlink port * @controller: associated controller number for the devlink port instance * @pf: associated PCI function number for the devlink port instance * @sf: associated SF number of a PF for the devlink port instance * @external: indicates if the port is for an external controller */void devlink_port_attrs_pci_sf_set(struct devlink_port *devlink_port, u32 controller, u16 pf, u32 sf, bool external){ struct devlink_port_attrs *attrs = &devlink_port->attrs;
ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
__devlink_port_attrs_set(devlink_port, DEVLINK_PORT_FLAVOUR_PCI_SF); attrs->pci_sf.controller = controller; attrs->pci_sf.pf = pf; attrs->pci_sf.sf = sf; attrs->pci_sf.external = external;}EXPORT_SYMBOL_GPL(devlink_port_attrs_pci_sf_set);
static void devlink_port_rel_notify_cb(struct devlink *devlink, u32 port_index){ struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index); if (!devlink_port) return; devlink_port_notify(devlink_port, DEVLINK_CMD_PORT_NEW);}
static void devlink_port_rel_cleanup_cb(struct devlink *devlink, u32 port_index, u32 rel_index){ struct devlink_port *devlink_port;
devlink_port = devlink_port_get_by_index(devlink, port_index); if (devlink_port && devlink_port->rel_index == rel_index) devlink_port->rel_index = 0;}
/** * devl_port_fn_devlink_set - Attach peer devlink * instance to port function. * @devlink_port: devlink port * @fn_devlink: devlink instance to attach */int devl_port_fn_devlink_set(struct devlink_port *devlink_port, struct devlink *fn_devlink){ ASSERT_DEVLINK_PORT_REGISTERED(devlink_port);
if (WARN_ON(devlink_port->attrs.flavour != DEVLINK_PORT_FLAVOUR_PCI_SF || devlink_port->attrs.pci_sf.external)) return -EINVAL;
return devlink_rel_nested_in_add(&devlink_port->rel_index, devlink_port->devlink->index, devlink_port->index, devlink_port_rel_notify_cb, devlink_port_rel_cleanup_cb, fn_devlink);}EXPORT_SYMBOL_GPL(devl_port_fn_devlink_set);
/** * devlink_port_linecard_set - Link port with a linecard * * @devlink_port: devlink port * @linecard: devlink linecard */void devlink_port_linecard_set(struct devlink_port *devlink_port, struct devlink_linecard *linecard){ ASSERT_DEVLINK_PORT_NOT_REGISTERED(devlink_port);
devlink_port->linecard = linecard;}EXPORT_SYMBOL_GPL(devlink_port_linecard_set);
static int __devlink_port_phys_port_name_get(struct devlink_port *devlink_port, char *name, size_t len){ struct devlink_port_attrs *attrs = &devlink_port->attrs; int n = 0;
if (!devlink_port->attrs_set || devlink_port->attrs.no_phys_port_name) return -EOPNOTSUPP;
switch (attrs->flavour) { case DEVLINK_PORT_FLAVOUR_PHYSICAL: if (devlink_port->linecard) n = snprintf(name, len, "l%u", devlink_linecard_index(devlink_port->linecard)); if (n < len) n += snprintf(name + n, len - n, "p%u", attrs->phys.port_number); if (n < len && attrs->split) n += snprintf(name + n, len - n, "s%u", attrs->phys.split_subport_number); break; case DEVLINK_PORT_FLAVOUR_CPU: case DEVLINK_PORT_FLAVOUR_DSA: case DEVLINK_PORT_FLAVOUR_UNUSED: /* As CPU and DSA ports do not have a netdevice associated * case should not ever happen. */ WARN_ON(1); return -EINVAL; case DEVLINK_PORT_FLAVOUR_PCI_PF: if (attrs->pci_pf.external) { n = snprintf(name, len, "c%u", attrs->pci_pf.controller); if (n >= len) return -EINVAL; len -= n; name += n; } n = snprintf(name, len, "pf%u", attrs->pci_pf.pf); break; case DEVLINK_PORT_FLAVOUR_PCI_VF: if (attrs->pci_vf.external) { n = snprintf(name, len, "c%u", attrs->pci_vf.controller); if (n >= len) return -EINVAL; len -= n; name += n; } n = snprintf(name, len, "pf%uvf%u", attrs->pci_vf.pf, attrs->pci_vf.vf); break; case DEVLINK_PORT_FLAVOUR_PCI_SF: if (attrs->pci_sf.external) { n = snprintf(name, len, "c%u", attrs->pci_sf.controller); if (n >= len) return -EINVAL; len -= n; name += n; } n = snprintf(name, len, "pf%usf%u", attrs->pci_sf.pf, attrs->pci_sf.sf); break; case DEVLINK_PORT_FLAVOUR_VIRTUAL: return -EOPNOTSUPP; }
if (n >= len) return -EINVAL;
return 0;}
int devlink_compat_phys_port_name_get(struct net_device *dev, char *name, size_t len){ struct devlink_port *devlink_port;
/* RTNL mutex is held here which ensures that devlink_port * instance cannot disappear in the middle. No need to take * any devlink lock as only permanent values are accessed. */ ASSERT_RTNL();
devlink_port = dev->devlink_port; if (!devlink_port) return -EOPNOTSUPP;
return __devlink_port_phys_port_name_get(devlink_port, name, len);}
int devlink_compat_switch_id_get(struct net_device *dev, struct netdev_phys_item_id *ppid){ struct devlink_port *devlink_port;
/* Caller must hold RTNL mutex or reference to dev, which ensures that * devlink_port instance cannot disappear in the middle. No need to take * any devlink lock as only permanent values are accessed. */ devlink_port = dev->devlink_port; if (!devlink_port || !devlink_port->switch_port) return -EOPNOTSUPP;
memcpy(ppid, &devlink_port->attrs.switch_id, sizeof(*ppid));
return 0;}