diff options
Diffstat (limited to 'drivers/net/enic/enic_pp.c')
| -rw-r--r-- | drivers/net/enic/enic_pp.c | 264 |
1 files changed, 264 insertions, 0 deletions
diff --git a/drivers/net/enic/enic_pp.c b/drivers/net/enic/enic_pp.c new file mode 100644 index 000000000000..ffaa75dd1ded --- /dev/null +++ b/drivers/net/enic/enic_pp.c @@ -0,0 +1,264 @@ +/* + * Copyright 2011 Cisco Systems, Inc. All rights reserved. + * + * This program is free software; you may redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + * + */ + +#include <linux/kernel.h> +#include <linux/string.h> +#include <linux/errno.h> +#include <linux/types.h> +#include <linux/netdevice.h> +#include <linux/etherdevice.h> +#include <linux/rtnetlink.h> +#include <net/ip.h> + +#include "vnic_vic.h" +#include "enic_res.h" +#include "enic.h" +#include "enic_dev.h" + +static int enic_set_port_profile(struct enic *enic) +{ + struct net_device *netdev = enic->netdev; + struct vic_provinfo *vp; + const u8 oui[3] = VIC_PROVINFO_CISCO_OUI; + const u16 os_type = htons(VIC_GENERIC_PROV_OS_TYPE_LINUX); + char uuid_str[38]; + char client_mac_str[18]; + u8 *client_mac; + int err; + + if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name)) + return -EINVAL; + + vp = vic_provinfo_alloc(GFP_KERNEL, oui, + VIC_PROVINFO_GENERIC_TYPE); + if (!vp) + return -ENOMEM; + + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_PORT_PROFILE_NAME_STR, + strlen(enic->pp.name) + 1, enic->pp.name); + + if (!is_zero_ether_addr(enic->pp.mac_addr)) + client_mac = enic->pp.mac_addr; + else + client_mac = netdev->dev_addr; + + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_CLIENT_MAC_ADDR, + ETH_ALEN, client_mac); + + snprintf(client_mac_str, sizeof(client_mac_str), "%pM", client_mac); + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_CLUSTER_PORT_UUID_STR, + sizeof(client_mac_str), client_mac_str); + + if (enic->pp.set & ENIC_SET_INSTANCE) { + sprintf(uuid_str, "%pUB", enic->pp.instance_uuid); + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_CLIENT_UUID_STR, + sizeof(uuid_str), uuid_str); + } + + if (enic->pp.set & ENIC_SET_HOST) { + sprintf(uuid_str, "%pUB", enic->pp.host_uuid); + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_HOST_UUID_STR, + sizeof(uuid_str), uuid_str); + } + + VIC_PROVINFO_ADD_TLV(vp, + VIC_GENERIC_PROV_TLV_OS_TYPE, + sizeof(os_type), &os_type); + + err = enic_dev_status_to_errno(enic_dev_init_prov2(enic, vp)); + +add_tlv_failure: + vic_provinfo_free(vp); + + return err; +} + +static int enic_unset_port_profile(struct enic *enic) +{ + int err; + + err = enic_vnic_dev_deinit(enic); + if (err) + return enic_dev_status_to_errno(err); + + enic_reset_addr_lists(enic); + + return 0; +} + +static int enic_are_pp_different(struct enic_port_profile *pp1, + struct enic_port_profile *pp2) +{ + return strcmp(pp1->name, pp2->name) | !!memcmp(pp1->instance_uuid, + pp2->instance_uuid, PORT_UUID_MAX) | + !!memcmp(pp1->host_uuid, pp2->host_uuid, PORT_UUID_MAX) | + !!memcmp(pp1->mac_addr, pp2->mac_addr, ETH_ALEN); +} + +static int enic_pp_preassociate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp); +static int enic_pp_disassociate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp); +static int enic_pp_preassociate_rr(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp); +static int enic_pp_associate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp); + +static int (*enic_pp_handlers[])(struct enic *enic, + struct enic_port_profile *prev_state, int *restore_pp) = { + [PORT_REQUEST_PREASSOCIATE] = enic_pp_preassociate, + [PORT_REQUEST_PREASSOCIATE_RR] = enic_pp_preassociate_rr, + [PORT_REQUEST_ASSOCIATE] = enic_pp_associate, + [PORT_REQUEST_DISASSOCIATE] = enic_pp_disassociate, +}; + +static const int enic_pp_handlers_count = + sizeof(enic_pp_handlers)/sizeof(*enic_pp_handlers); + +static int enic_pp_preassociate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp) +{ + return -EOPNOTSUPP; +} + +static int enic_pp_disassociate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp) +{ + return enic_unset_port_profile(enic); +} + +static int enic_pp_preassociate_rr(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp) +{ + int err; + int active = 0; + + if (enic->pp.request != PORT_REQUEST_ASSOCIATE) { + /* If pre-associate is not part of an associate. + We always disassociate first */ + err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE](enic, + prev_pp, restore_pp); + if (err) + return err; + + *restore_pp = 0; + } + + *restore_pp = 0; + + err = enic_set_port_profile(enic); + if (err) + return err; + + /* If pre-associate is not part of an associate. */ + if (enic->pp.request != PORT_REQUEST_ASSOCIATE) + err = enic_dev_status_to_errno(enic_dev_enable2(enic, active)); + + return err; +} + +static int enic_pp_associate(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp) +{ + int err; + int active = 1; + + /* Check if a pre-associate was called before */ + if (prev_pp->request != PORT_REQUEST_PREASSOCIATE_RR || + (prev_pp->request == PORT_REQUEST_PREASSOCIATE_RR && + enic_are_pp_different(prev_pp, &enic->pp))) { + err = enic_pp_handlers[PORT_REQUEST_DISASSOCIATE]( + enic, prev_pp, restore_pp); + if (err) + return err; + + *restore_pp = 0; + } + + err = enic_pp_handlers[PORT_REQUEST_PREASSOCIATE_RR]( + enic, prev_pp, restore_pp); + if (err) + return err; + + *restore_pp = 0; + + return enic_dev_status_to_errno(enic_dev_enable2(enic, active)); +} + +int enic_process_set_pp_request(struct enic *enic, + struct enic_port_profile *prev_pp, int *restore_pp) +{ + if (enic->pp.request < enic_pp_handlers_count + && enic_pp_handlers[enic->pp.request]) + return enic_pp_handlers[enic->pp.request](enic, + prev_pp, restore_pp); + else + return -EOPNOTSUPP; +} + +int enic_process_get_pp_request(struct enic *enic, int request, + u16 *response) +{ + int err, status = ERR_SUCCESS; + + switch (request) { + + case PORT_REQUEST_PREASSOCIATE_RR: + case PORT_REQUEST_ASSOCIATE: + err = enic_dev_enable2_done(enic, &status); + break; + + case PORT_REQUEST_DISASSOCIATE: + err = enic_dev_deinit_done(enic, &status); + break; + + default: + return -EINVAL; + } + + if (err) + status = err; + + switch (status) { + case ERR_SUCCESS: + *response = PORT_PROFILE_RESPONSE_SUCCESS; + break; + case ERR_EINVAL: + *response = PORT_PROFILE_RESPONSE_INVALID; + break; + case ERR_EBADSTATE: + *response = PORT_PROFILE_RESPONSE_BADSTATE; + break; + case ERR_ENOMEM: + *response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES; + break; + case ERR_EINPROGRESS: + *response = PORT_PROFILE_RESPONSE_INPROGRESS; + break; + default: + *response = PORT_PROFILE_RESPONSE_ERROR; + break; + } + + return 0; +} |