diff options
Diffstat (limited to 'target/linux/generic/files/drivers/net/phy/swconfig.c')
| -rw-r--r-- | target/linux/generic/files/drivers/net/phy/swconfig.c | 1043 |
1 files changed, 1043 insertions, 0 deletions
diff --git a/target/linux/generic/files/drivers/net/phy/swconfig.c b/target/linux/generic/files/drivers/net/phy/swconfig.c new file mode 100644 index 000000000..e772c9448 --- /dev/null +++ b/target/linux/generic/files/drivers/net/phy/swconfig.c @@ -0,0 +1,1043 @@ +/* + * swconfig.c: Switch configuration API + * + * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org> + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * as published by the Free Software Foundation; either version 2 + * of the License, or (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <linux/types.h> +#include <linux/module.h> +#include <linux/init.h> +#include <linux/list.h> +#include <linux/if.h> +#include <linux/if_ether.h> +#include <linux/capability.h> +#include <linux/skbuff.h> +#include <linux/switch.h> + +//#define DEBUG 1 +#ifdef DEBUG +#define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__) +#else +#define DPRINTF(...) do {} while(0) +#endif + +#define SWCONFIG_DEVNAME "switch%d" + +#include "swconfig_leds.c" + +MODULE_AUTHOR("Felix Fietkau <nbd@openwrt.org>"); +MODULE_LICENSE("GPL"); + +static int swdev_id = 0; +static struct list_head swdevs; +static DEFINE_SPINLOCK(swdevs_lock); +struct swconfig_callback; + +struct swconfig_callback +{ + struct sk_buff *msg; + struct genlmsghdr *hdr; + struct genl_info *info; + int cmd; + + /* callback for filling in the message data */ + int (*fill)(struct swconfig_callback *cb, void *arg); + + /* callback for closing the message before sending it */ + int (*close)(struct swconfig_callback *cb, void *arg); + + struct nlattr *nest[4]; + int args[4]; +}; + +/* defaults */ + +static int +swconfig_get_vlan_ports(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + int ret; + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + if (!dev->ops->get_vlan_ports) + return -EOPNOTSUPP; + + ret = dev->ops->get_vlan_ports(dev, val); + return ret; +} + +static int +swconfig_set_vlan_ports(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + struct switch_port *ports = val->value.ports; + const struct switch_dev_ops *ops = dev->ops; + int i; + + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + /* validate ports */ + if (val->len > dev->ports) + return -EINVAL; + + if (!ops->set_vlan_ports) + return -EOPNOTSUPP; + + for (i = 0; i < val->len; i++) { + if (ports[i].id >= dev->ports) + return -EINVAL; + + if (ops->set_port_pvid && + !(ports[i].flags & (1 << SWITCH_PORT_FLAG_TAGGED))) + ops->set_port_pvid(dev, ports[i].id, val->port_vlan); + } + + return ops->set_vlan_ports(dev, val); +} + +static int +swconfig_set_pvid(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + if (val->port_vlan >= dev->ports) + return -EINVAL; + + if (!dev->ops->set_port_pvid) + return -EOPNOTSUPP; + + return dev->ops->set_port_pvid(dev, val->port_vlan, val->value.i); +} + +static int +swconfig_get_pvid(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + if (val->port_vlan >= dev->ports) + return -EINVAL; + + if (!dev->ops->get_port_pvid) + return -EOPNOTSUPP; + + return dev->ops->get_port_pvid(dev, val->port_vlan, &val->value.i); +} + +static const char * +swconfig_speed_str(enum switch_port_speed speed) +{ + switch (speed) { + case SWITCH_PORT_SPEED_10: + return "10baseT"; + case SWITCH_PORT_SPEED_100: + return "100baseT"; + case SWITCH_PORT_SPEED_1000: + return "1000baseT"; + default: + break; + } + + return "unknown"; +} + +static int +swconfig_get_link(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + struct switch_port_link link; + int len; + int ret; + + if (val->port_vlan >= dev->ports) + return -EINVAL; + + if (!dev->ops->get_port_link) + return -EOPNOTSUPP; + + memset(&link, 0, sizeof(link)); + ret = dev->ops->get_port_link(dev, val->port_vlan, &link); + if (ret) + return ret; + + memset(dev->buf, 0, sizeof(dev->buf)); + + if (link.link) + len = snprintf(dev->buf, sizeof(dev->buf), + "port:%d link:up speed:%s %s-duplex %s%s%s", + val->port_vlan, + swconfig_speed_str(link.speed), + link.duplex ? "full" : "half", + link.tx_flow ? "txflow ": "", + link.rx_flow ? "rxflow " : "", + link.aneg ? "auto" : ""); + else + len = snprintf(dev->buf, sizeof(dev->buf), "port:%d link:down", + val->port_vlan); + + val->value.s = dev->buf; + val->len = len; + + return 0; +} + +static int +swconfig_apply_config(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + /* don't complain if not supported by the switch driver */ + if (!dev->ops->apply_config) + return 0; + + return dev->ops->apply_config(dev); +} + +static int +swconfig_reset_switch(struct switch_dev *dev, const struct switch_attr *attr, struct switch_val *val) +{ + /* don't complain if not supported by the switch driver */ + if (!dev->ops->reset_switch) + return 0; + + return dev->ops->reset_switch(dev); +} + +enum global_defaults { + GLOBAL_APPLY, + GLOBAL_RESET, +}; + +enum vlan_defaults { + VLAN_PORTS, +}; + +enum port_defaults { + PORT_PVID, + PORT_LINK, +}; + +static struct switch_attr default_global[] = { + [GLOBAL_APPLY] = { + .type = SWITCH_TYPE_NOVAL, + .name = "apply", + .description = "Activate changes in the hardware", + .set = swconfig_apply_config, + }, + [GLOBAL_RESET] = { + .type = SWITCH_TYPE_NOVAL, + .name = "reset", + .description = "Reset the switch", + .set = swconfig_reset_switch, + } +}; + +static struct switch_attr default_port[] = { + [PORT_PVID] = { + .type = SWITCH_TYPE_INT, + .name = "pvid", + .description = "Primary VLAN ID", + .set = swconfig_set_pvid, + .get = swconfig_get_pvid, + }, + [PORT_LINK] = { + .type = SWITCH_TYPE_STRING, + .name = "link", + .description = "Get port link information", + .set = NULL, + .get = swconfig_get_link, + } +}; + +static struct switch_attr default_vlan[] = { + [VLAN_PORTS] = { + .type = SWITCH_TYPE_PORTS, + .name = "ports", + .description = "VLAN port mapping", + .set = swconfig_set_vlan_ports, + .get = swconfig_get_vlan_ports, + }, +}; + +static const struct switch_attr * +swconfig_find_attr_by_name(const struct switch_attrlist *alist, const char *name) +{ + int i; + + for (i = 0; i < alist->n_attr; i++) + if (strcmp(name, alist->attr[i].name) == 0) + return &alist->attr[i]; + + return NULL; +} + +static void swconfig_defaults_init(struct switch_dev *dev) +{ + const struct switch_dev_ops *ops = dev->ops; + + dev->def_global = 0; + dev->def_vlan = 0; + dev->def_port = 0; + + if (ops->get_vlan_ports || ops->set_vlan_ports) + set_bit(VLAN_PORTS, &dev->def_vlan); + + if (ops->get_port_pvid || ops->set_port_pvid) + set_bit(PORT_PVID, &dev->def_port); + + if (ops->get_port_link && + !swconfig_find_attr_by_name(&ops->attr_port, "link")) + set_bit(PORT_LINK, &dev->def_port); + + /* always present, can be no-op */ + set_bit(GLOBAL_APPLY, &dev->def_global); + set_bit(GLOBAL_RESET, &dev->def_global); +} + + +static struct genl_family switch_fam = { + .id = GENL_ID_GENERATE, + .name = "switch", + .hdrsize = 0, + .version = 1, + .maxattr = SWITCH_ATTR_MAX, +}; + +static const struct nla_policy switch_policy[SWITCH_ATTR_MAX+1] = { + [SWITCH_ATTR_ID] = { .type = NLA_U32 }, + [SWITCH_ATTR_OP_ID] = { .type = NLA_U32 }, + [SWITCH_ATTR_OP_PORT] = { .type = NLA_U32 }, + [SWITCH_ATTR_OP_VLAN] = { .type = NLA_U32 }, + [SWITCH_ATTR_OP_VALUE_INT] = { .type = NLA_U32 }, + [SWITCH_ATTR_OP_VALUE_STR] = { .type = NLA_NUL_STRING }, + [SWITCH_ATTR_OP_VALUE_PORTS] = { .type = NLA_NESTED }, + [SWITCH_ATTR_TYPE] = { .type = NLA_U32 }, +}; + +static const struct nla_policy port_policy[SWITCH_PORT_ATTR_MAX+1] = { + [SWITCH_PORT_ID] = { .type = NLA_U32 }, + [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG }, +}; + +static inline void +swconfig_lock(void) +{ + spin_lock(&swdevs_lock); +} + +static inline void +swconfig_unlock(void) +{ + spin_unlock(&swdevs_lock); +} + +static struct switch_dev * +swconfig_get_dev(struct genl_info *info) +{ + struct switch_dev *dev = NULL; + struct switch_dev *p; + int id; + + if (!info->attrs[SWITCH_ATTR_ID]) + goto done; + + id = nla_get_u32(info->attrs[SWITCH_ATTR_ID]); + swconfig_lock(); + list_for_each_entry(p, &swdevs, dev_list) { + if (id != p->id) + continue; + + dev = p; + break; + } + if (dev) + mutex_lock(&dev->sw_mutex); + else + DPRINTF("device %d not found\n", id); + swconfig_unlock(); +done: + return dev; +} + +static inline void +swconfig_put_dev(struct switch_dev *dev) +{ + mutex_unlock(&dev->sw_mutex); +} + +static int +swconfig_dump_attr(struct swconfig_callback *cb, void *arg) +{ + struct switch_attr *op = arg; + struct genl_info *info = cb->info; + struct sk_buff *msg = cb->msg; + int id = cb->args[0]; + void *hdr; + + hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam, + NLM_F_MULTI, SWITCH_CMD_NEW_ATTR); + if (IS_ERR(hdr)) + return -1; + + NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, id); + NLA_PUT_U32(msg, SWITCH_ATTR_OP_TYPE, op->type); + NLA_PUT_STRING(msg, SWITCH_ATTR_OP_NAME, op->name); + if (op->description) + NLA_PUT_STRING(msg, SWITCH_ATTR_OP_DESCRIPTION, + op->description); + + return genlmsg_end(msg, hdr); +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +/* spread multipart messages across multiple message buffers */ +static int +swconfig_send_multipart(struct swconfig_callback *cb, void *arg) +{ + struct genl_info *info = cb->info; + int restart = 0; + int err; + + do { + if (!cb->msg) { + cb->msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (cb->msg == NULL) + goto error; + } + + if (!(cb->fill(cb, arg) < 0)) + break; + + /* fill failed, check if this was already the second attempt */ + if (restart) + goto error; + + /* try again in a new message, send the current one */ + restart = 1; + if (cb->close) { + if (cb->close(cb, arg) < 0) + goto error; + } + err = genlmsg_reply(cb->msg, info); + cb->msg = NULL; + if (err < 0) + goto error; + + } while (restart); + + return 0; + +error: + if (cb->msg) + nlmsg_free(cb->msg); + return -1; +} + +static int +swconfig_list_attrs(struct sk_buff *skb, struct genl_info *info) +{ + struct genlmsghdr *hdr = nlmsg_data(info->nlhdr); + const struct switch_attrlist *alist; + struct switch_dev *dev; + struct swconfig_callback cb; + int err = -EINVAL; + int i; + + /* defaults */ + struct switch_attr *def_list; + unsigned long *def_active; + int n_def; + + dev = swconfig_get_dev(info); + if (!dev) + return -EINVAL; + + switch(hdr->cmd) { + case SWITCH_CMD_LIST_GLOBAL: + alist = &dev->ops->attr_global; + def_list = default_global; + def_active = &dev->def_global; + n_def = ARRAY_SIZE(default_global); + break; + case SWITCH_CMD_LIST_VLAN: + alist = &dev->ops->attr_vlan; + def_list = default_vlan; + def_active = &dev->def_vlan; + n_def = ARRAY_SIZE(default_vlan); + break; + case SWITCH_CMD_LIST_PORT: + alist = &dev->ops->attr_port; + def_list = default_port; + def_active = &dev->def_port; + n_def = ARRAY_SIZE(default_port); + break; + default: + WARN_ON(1); + goto out; + } + + memset(&cb, 0, sizeof(cb)); + cb.info = info; + cb.fill = swconfig_dump_attr; + for (i = 0; i < alist->n_attr; i++) { + if (alist->attr[i].disabled) + continue; + cb.args[0] = i; + err = swconfig_send_multipart(&cb, (void *) &alist->attr[i]); + if (err < 0) + goto error; + } + + /* defaults */ + for (i = 0; i < n_def; i++) { + if (!test_bit(i, def_active)) + continue; + cb.args[0] = SWITCH_ATTR_DEFAULTS_OFFSET + i; + err = swconfig_send_multipart(&cb, (void *) &def_list[i]); + if (err < 0) + goto error; + } + swconfig_put_dev(dev); + + if (!cb.msg) + return 0; + + return genlmsg_reply(cb.msg, info); + +error: + if (cb.msg) + nlmsg_free(cb.msg); +out: + swconfig_put_dev(dev); + return err; +} + +static const struct switch_attr * +swconfig_lookup_attr(struct switch_dev *dev, struct genl_info *info, + struct switch_val *val) +{ + struct genlmsghdr *hdr = nlmsg_data(info->nlhdr); + const struct switch_attrlist *alist; + const struct switch_attr *attr = NULL; + int attr_id; + + /* defaults */ + struct switch_attr *def_list; + unsigned long *def_active; + int n_def; + + if (!info->attrs[SWITCH_ATTR_OP_ID]) + goto done; + + switch(hdr->cmd) { + case SWITCH_CMD_SET_GLOBAL: + case SWITCH_CMD_GET_GLOBAL: + alist = &dev->ops->attr_global; + def_list = default_global; + def_active = &dev->def_global; + n_def = ARRAY_SIZE(default_global); + break; + case SWITCH_CMD_SET_VLAN: + case SWITCH_CMD_GET_VLAN: + alist = &dev->ops->attr_vlan; + def_list = default_vlan; + def_active = &dev->def_vlan; + n_def = ARRAY_SIZE(default_vlan); + if (!info->attrs[SWITCH_ATTR_OP_VLAN]) + goto done; + val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_VLAN]); + if (val->port_vlan >= dev->vlans) + goto done; + break; + case SWITCH_CMD_SET_PORT: + case SWITCH_CMD_GET_PORT: + alist = &dev->ops->attr_port; + def_list = default_port; + def_active = &dev->def_port; + n_def = ARRAY_SIZE(default_port); + if (!info->attrs[SWITCH_ATTR_OP_PORT]) + goto done; + val->port_vlan = nla_get_u32(info->attrs[SWITCH_ATTR_OP_PORT]); + if (val->port_vlan >= dev->ports) + goto done; + break; + default: + WARN_ON(1); + goto done; + } + + if (!alist) + goto done; + + attr_id = nla_get_u32(info->attrs[SWITCH_ATTR_OP_ID]); + if (attr_id >= SWITCH_ATTR_DEFAULTS_OFFSET) { + attr_id -= SWITCH_ATTR_DEFAULTS_OFFSET; + if (attr_id >= n_def) + goto done; + if (!test_bit(attr_id, def_active)) + goto done; + attr = &def_list[attr_id]; + } else { + if (attr_id >= alist->n_attr) + goto done; + attr = &alist->attr[attr_id]; + } + + if (attr->disabled) + attr = NULL; + +done: + if (!attr) + DPRINTF("attribute lookup failed\n"); + val->attr = attr; + return attr; +} + +static int +swconfig_parse_ports(struct sk_buff *msg, struct nlattr *head, + struct switch_val *val, int max) +{ + struct nlattr *nla; + int rem; + + val->len = 0; + nla_for_each_nested(nla, head, rem) { + struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1]; + struct switch_port *port = &val->value.ports[val->len]; + + if (val->len >= max) + return -EINVAL; + + if (nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, nla, + port_policy)) + return -EINVAL; + + if (!tb[SWITCH_PORT_ID]) + return -EINVAL; + + port->id = nla_get_u32(tb[SWITCH_PORT_ID]); + if (tb[SWITCH_PORT_FLAG_TAGGED]) + port->flags |= (1 << SWITCH_PORT_FLAG_TAGGED); + val->len++; + } + + return 0; +} + +static int +swconfig_set_attr(struct sk_buff *skb, struct genl_info *info) +{ + const struct switch_attr *attr; + struct switch_dev *dev; + struct switch_val val; + int err = -EINVAL; + + dev = swconfig_get_dev(info); + if (!dev) + return -EINVAL; + + memset(&val, 0, sizeof(val)); + attr = swconfig_lookup_attr(dev, info, &val); + if (!attr || !attr->set) + goto error; + + val.attr = attr; + switch(attr->type) { + case SWITCH_TYPE_NOVAL: + break; + case SWITCH_TYPE_INT: + if (!info->attrs[SWITCH_ATTR_OP_VALUE_INT]) + goto error; + val.value.i = + nla_get_u32(info->attrs[SWITCH_ATTR_OP_VALUE_INT]); + break; + case SWITCH_TYPE_STRING: + if (!info->attrs[SWITCH_ATTR_OP_VALUE_STR]) + goto error; + val.value.s = + nla_data(info->attrs[SWITCH_ATTR_OP_VALUE_STR]); + break; + case SWITCH_TYPE_PORTS: + val.value.ports = dev->portbuf; + memset(dev->portbuf, 0, + sizeof(struct switch_port) * dev->ports); + + /* TODO: implement multipart? */ + if (info->attrs[SWITCH_ATTR_OP_VALUE_PORTS]) { + err = swconfig_parse_ports(skb, + info->attrs[SWITCH_ATTR_OP_VALUE_PORTS], &val, dev->ports); + if (err < 0) + goto error; + } else { + val.len = 0; + err = 0; + } + break; + default: + goto error; + } + + err = attr->set(dev, attr, &val); +error: + swconfig_put_dev(dev); + return err; +} + +static int +swconfig_close_portlist(struct swconfig_callback *cb, void *arg) +{ + if (cb->nest[0]) + nla_nest_end(cb->msg, cb->nest[0]); + return 0; +} + +static int +swconfig_send_port(struct swconfig_callback *cb, void *arg) +{ + const struct switch_port *port = arg; + struct nlattr *p = NULL; + + if (!cb->nest[0]) { + cb->nest[0] = nla_nest_start(cb->msg, cb->cmd); + if (!cb->nest[0]) + return -1; + } + + p = nla_nest_start(cb->msg, SWITCH_ATTR_PORT); + if (!p) + goto error; + + NLA_PUT_U32(cb->msg, SWITCH_PORT_ID, port->id); + if (port->flags & (1 << SWITCH_PORT_FLAG_TAGGED)) + NLA_PUT_FLAG(cb->msg, SWITCH_PORT_FLAG_TAGGED); + + nla_nest_end(cb->msg, p); + return 0; + +nla_put_failure: + nla_nest_cancel(cb->msg, p); +error: + nla_nest_cancel(cb->msg, cb->nest[0]); + return -1; +} + +static int +swconfig_send_ports(struct sk_buff **msg, struct genl_info *info, int attr, + const struct switch_val *val) +{ + struct swconfig_callback cb; + int err = 0; + int i; + + if (!val->value.ports) + return -EINVAL; + + memset(&cb, 0, sizeof(cb)); + cb.cmd = attr; + cb.msg = *msg; + cb.info = info; + cb.fill = swconfig_send_port; + cb.close = swconfig_close_portlist; + + cb.nest[0] = nla_nest_start(cb.msg, cb.cmd); + for (i = 0; i < val->len; i++) { + err = swconfig_send_multipart(&cb, &val->value.ports[i]); + if (err) + goto done; + } + err = val->len; + swconfig_close_portlist(&cb, NULL); + *msg = cb.msg; + +done: + return err; +} + +static int +swconfig_get_attr(struct sk_buff *skb, struct genl_info *info) +{ + struct genlmsghdr *hdr = nlmsg_data(info->nlhdr); + const struct switch_attr *attr; + struct switch_dev *dev; + struct sk_buff *msg = NULL; + struct switch_val val; + int err = -EINVAL; + int cmd = hdr->cmd; + + dev = swconfig_get_dev(info); + if (!dev) + return -EINVAL; + + memset(&val, 0, sizeof(val)); + attr = swconfig_lookup_attr(dev, info, &val); + if (!attr || !attr->get) + goto error; + + if (attr->type == SWITCH_TYPE_PORTS) { + val.value.ports = dev->portbuf; + memset(dev->portbuf, 0, + sizeof(struct switch_port) * dev->ports); + } + + err = attr->get(dev, attr, &val); + if (err) + goto error; + + msg = nlmsg_new(NLMSG_GOODSIZE, GFP_KERNEL); + if (!msg) + goto error; + + hdr = genlmsg_put(msg, info->snd_pid, info->snd_seq, &switch_fam, + 0, cmd); + if (IS_ERR(hdr)) + goto nla_put_failure; + + switch(attr->type) { + case SWITCH_TYPE_INT: + NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val.value.i); + break; + case SWITCH_TYPE_STRING: + NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val.value.s); + break; + case SWITCH_TYPE_PORTS: + err = swconfig_send_ports(&msg, info, + SWITCH_ATTR_OP_VALUE_PORTS, &val); + if (err < 0) + goto nla_put_failure; + break; + default: + DPRINTF("invalid type in attribute\n"); + err = -EINVAL; + goto error; + } + err = genlmsg_end(msg, hdr); + if (err < 0) + goto nla_put_failure; + + swconfig_put_dev(dev); + return genlmsg_reply(msg, info); + +nla_put_failure: + if (msg) + nlmsg_free(msg); +error: + swconfig_put_dev(dev); + if (!err) + err = -ENOMEM; + return err; +} + +static int +swconfig_send_switch(struct sk_buff *msg, u32 pid, u32 seq, int flags, + const struct switch_dev *dev) +{ + void *hdr; + + hdr = genlmsg_put(msg, pid, seq, &switch_fam, flags, + SWITCH_CMD_NEW_ATTR); + if (IS_ERR(hdr)) + return -1; + + NLA_PUT_U32(msg, SWITCH_ATTR_ID, dev->id); + NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname); + NLA_PUT_STRING(msg, SWITCH_ATTR_ALIAS, dev->alias); + NLA_PUT_STRING(msg, SWITCH_ATTR_NAME, dev->name); + NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans); + NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports); + NLA_PUT_U32(msg, SWITCH_ATTR_CPU_PORT, dev->cpu_port); + + return genlmsg_end(msg, hdr); +nla_put_failure: + genlmsg_cancel(msg, hdr); + return -EMSGSIZE; +} + +static int swconfig_dump_switches(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct switch_dev *dev; + int start = cb->args[0]; + int idx = 0; + + swconfig_lock(); + list_for_each_entry(dev, &swdevs, dev_list) { + if (++idx <= start) + continue; + if (swconfig_send_switch(skb, NETLINK_CB(cb->skb).pid, + cb->nlh->nlmsg_seq, NLM_F_MULTI, + dev) < 0) + break; + } + swconfig_unlock(); + cb->args[0] = idx; + + return skb->len; +} + +static int +swconfig_done(struct netlink_callback *cb) +{ + return 0; +} + +static struct genl_ops swconfig_ops[] = { + { + .cmd = SWITCH_CMD_LIST_GLOBAL, + .doit = swconfig_list_attrs, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_LIST_VLAN, + .doit = swconfig_list_attrs, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_LIST_PORT, + .doit = swconfig_list_attrs, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_GET_GLOBAL, + .doit = swconfig_get_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_GET_VLAN, + .doit = swconfig_get_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_GET_PORT, + .doit = swconfig_get_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_SET_GLOBAL, + .doit = swconfig_set_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_SET_VLAN, + .doit = swconfig_set_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_SET_PORT, + .doit = swconfig_set_attr, + .policy = switch_policy, + }, + { + .cmd = SWITCH_CMD_GET_SWITCH, + .dumpit = swconfig_dump_switches, + .policy = switch_policy, + .done = swconfig_done, + } +}; + +int +register_switch(struct switch_dev *dev, struct net_device *netdev) +{ + struct switch_dev *sdev; + const int max_switches = 8 * sizeof(unsigned long); + unsigned long in_use = 0; + int err; + int i; + + INIT_LIST_HEAD(&dev->dev_list); + if (netdev) { + dev->netdev = netdev; + if (!dev->alias) + dev->alias = netdev->name; + } + BUG_ON(!dev->alias); + + if (dev->ports > 0) { + dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports, + GFP_KERNEL); + if (!dev->portbuf) + return -ENOMEM; + } + swconfig_defaults_init(dev); + mutex_init(&dev->sw_mutex); + swconfig_lock(); + dev->id = ++swdev_id; + + list_for_each_entry(sdev, &swdevs, dev_list) { + if (!sscanf(sdev->devname, SWCONFIG_DEVNAME, &i)) + continue; + if (i < 0 || i > max_switches) + continue; + + set_bit(i, &in_use); + } + i = find_first_zero_bit(&in_use, max_switches); + + if (i == max_switches) { + swconfig_unlock(); + return -ENFILE; + } + + /* fill device name */ + snprintf(dev->devname, IFNAMSIZ, SWCONFIG_DEVNAME, i); + + list_add(&dev->dev_list, &swdevs); + swconfig_unlock(); + + err = swconfig_create_led_trigger(dev); + if (err) + return err; + + return 0; +} +EXPORT_SYMBOL_GPL(register_switch); + +void +unregister_switch(struct switch_dev *dev) +{ + swconfig_destroy_led_trigger(dev); + kfree(dev->portbuf); + mutex_lock(&dev->sw_mutex); + swconfig_lock(); + list_del(&dev->dev_list); + swconfig_unlock(); + mutex_unlock(&dev->sw_mutex); +} +EXPORT_SYMBOL_GPL(unregister_switch); + + +static int __init +swconfig_init(void) +{ + int i, err; + + INIT_LIST_HEAD(&swdevs); + err = genl_register_family(&switch_fam); + if (err) + return err; + + for (i = 0; i < ARRAY_SIZE(swconfig_ops); i++) { + err = genl_register_ops(&switch_fam, &swconfig_ops[i]); + if (err) + goto unregister; + } + + return 0; + +unregister: + genl_unregister_family(&switch_fam); + return err; +} + +static void __exit +swconfig_exit(void) +{ + genl_unregister_family(&switch_fam); +} + +module_init(swconfig_init); +module_exit(swconfig_exit); + |