From: Felix Fietkau Date: Sat, 18 Oct 2008 20:44:53 +0000 (+0000) Subject: add new switch configuration api X-Git-Tag: v19.07.0-rc1~36036 X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=487c622ac0c37f3cd26add56df9081ea7caf3835;p=openwrt%2Fstaging%2Fhauke.git add new switch configuration api SVN-Revision: 13009 --- diff --git a/package/swconfig/Makefile b/package/swconfig/Makefile new file mode 100644 index 0000000000..0d86438a79 --- /dev/null +++ b/package/swconfig/Makefile @@ -0,0 +1,47 @@ +# +# Copyright (C) 2006 OpenWrt.org +# +# This is free software, licensed under the GNU General Public License v2. +# See /LICENSE for more information. +# +# $Id$ + +include $(TOPDIR)/rules.mk +include $(INCLUDE_DIR)/kernel.mk + +PKG_NAME:=kmod-swconfig +PKG_RELEASE:=1 +PKG_BUILD_DEPENDS:=libnl + +include $(INCLUDE_DIR)/package.mk + +define Package/swconfig + SECTION:=base + CATEGORY:=Base system + DEPENDS:=@LINUX_2_6_26||LINUX_2_6_27 + TITLE:=Switch configuration utility +endef + +TARGET_CPPFLAGS += \ + -I$(STAGING_DIR)/usr/include \ + -I$(LINUX_DIR)/include \ + -I$(PKG_BUILD_DIR) + +define Build/Prepare + mkdir -p $(PKG_BUILD_DIR) + $(CP) ./src/* $(PKG_BUILD_DIR)/ +endef + +define Build/Compile + CFLAGS="$(TARGET_CFLAGS) $(TARGET_CPPFLAGS)" \ + $(MAKE) -C $(PKG_BUILD_DIR) \ + $(TARGET_CONFIGURE_OPTS) \ + LIBS="$(STAGING_DIR)/usr/lib/libnl.a -lm" +endef + +define Package/swconfig/install + $(INSTALL_DIR) $(1)/bin + $(INSTALL_BIN) $(PKG_BUILD_DIR)/swconfig $(1)/bin/swconfig +endef + +$(eval $(call BuildPackage,swconfig)) diff --git a/package/swconfig/src/Makefile b/package/swconfig/src/Makefile new file mode 100644 index 0000000000..64816af541 --- /dev/null +++ b/package/swconfig/src/Makefile @@ -0,0 +1,12 @@ +ifndef CFLAGS +CFLAGS = -O2 -g -I ../src +endif +LIBS=-lnl + +all: swconfig + +%.o: %.c + $(CC) $(CFLAGS) -c -o $@ $^ + +swconfig: cli.o swlib.o + $(CC) $(LDFLAGS) -o $@ $^ $(LIBS) diff --git a/package/swconfig/src/cli.c b/package/swconfig/src/cli.c new file mode 100644 index 0000000000..c6035e585c --- /dev/null +++ b/package/swconfig/src/cli.c @@ -0,0 +1,255 @@ +/* + * swconfig.c: Switch configuration utility + * + * Copyright (C) 2008 Felix Fietkau + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public License + * version 2 as published by the Free Software Foundatio. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include "swlib.h" + +#define GET 1 +#define SET 2 + +void print_attrs(struct switch_attr *attr) +{ + int i = 0; + while (attr) { + const char *type; + switch(attr->type) { + case SWITCH_TYPE_INT: + type = "int"; + break; + case SWITCH_TYPE_STRING: + type = "string"; + break; + case SWITCH_TYPE_PORTS: + type = "ports"; + break; + case SWITCH_TYPE_NOVAL: + type = "none"; + break; + default: + type = "unknown"; + break; + } + printf("\tAttribute %d (%s): %s (%s)\n", ++i, type, attr->name, attr->description); + attr = attr->next; + } +} + +void list_attributes(struct switch_dev *dev) +{ + printf("Switch %d: %s(%s), ports: %d, vlans: %d\n", dev->id, dev->dev_name, dev->name, dev->ports, dev->vlans); + printf(" --switch\n"); + print_attrs(dev->ops); + printf(" --vlan\n"); + print_attrs(dev->vlan_ops); + printf(" --port\n"); + print_attrs(dev->port_ops); +} + +void print_usage(void) +{ + printf("swconfig dev [port |vlan ] (help|set |get )\n"); + exit(0); +} + +int main(int argc, char **argv) +{ + int retval = 0; + struct switch_dev *dev; + struct switch_attr *a; + struct switch_val val; + int err; + int i; + + struct switch_port *ports; + + int cmd = 0; + char *cdev = NULL; + int cport = -1; + int cvlan = -1; + char *ckey = NULL; + char *cvalue = NULL; + int chelp = 0; + + if(argc < 4) + print_usage(); + + if(strcmp(argv[1], "dev")) + print_usage(); + + cdev = argv[2]; + + for(i = 3; i < argc; i++) + { + int p; + if(!strcmp(argv[i], "help")) + { + chelp = 1; + continue; + } + if(i + 1 >= argc) + print_usage(); + p = atoi(argv[i + 1]); + if(!strcmp(argv[i], "port")) + { + cport = p; + } else if(!strcmp(argv[i], "vlan")) + { + cvlan = p; + } else if(!strcmp(argv[i], "set")) + { + if(argc <= i + 1) + print_usage(); + cmd = SET; + ckey = argv[i + 1]; + if (argc > i + 2) + cvalue = argv[i + 2]; + else + cvalue = NULL; + i++; + } else if(!strcmp(argv[i], "get")) + { + cmd = GET; + ckey = argv[i + 1]; + } else{ + print_usage(); + } + i++; + } + + if(cport > -1 && cvlan > -1) + print_usage(); + + dev = swlib_connect(cdev); + if (!dev) { + fprintf(stderr, "Failed to connect to the switch\n"); + return 1; + } + + ports = malloc(sizeof(struct switch_port) * dev->ports); + memset(ports, 0, sizeof(struct switch_port) * dev->ports); + swlib_scan(dev); + + if(chelp) + { + list_attributes(dev); + goto out; + } + + if(cport > -1) + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_PORT, ckey); + else if(cvlan > -1) + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_VLAN, ckey); + else + a = swlib_lookup_attr(dev, SWLIB_ATTR_GROUP_GLOBAL, ckey); + + if(!a) + { + fprintf(stderr, "Unknown attribute \"%s\"\n", ckey); + goto out; + } + + switch(cmd) + { + case SET: + if ((a->type != SWITCH_TYPE_NOVAL) && + (cvalue == NULL)) + print_usage(); + + switch(a->type) { + case SWITCH_TYPE_INT: + val.value.i = atoi(cvalue); + break; + case SWITCH_TYPE_STRING: + val.value.s = cvalue; + break; + case SWITCH_TYPE_PORTS: + val.len = 0; + while(cvalue && *cvalue) + { + ports[val.len].flags = 0; + ports[val.len].id = strtol(cvalue, &cvalue, 10); + while(*cvalue && !isspace(*cvalue)) { + if (*cvalue == 't') + ports[val.len].flags |= SWLIB_PORT_FLAG_TAGGED; + cvalue++; + } + if (*cvalue) + cvalue++; + val.len++; + } + val.value.ports = ports; + break; + default: + break; + } + if(cvlan > -1) + val.port_vlan = cvlan; + if(cport > -1) + val.port_vlan = cport; + if(swlib_set_attr(dev, a, &val) < 0) + { + fprintf(stderr, "failed\n"); + retval = -1; + goto out; + } + break; + case GET: + if(cvlan > -1) + val.port_vlan = cvlan; + if(cport > -1) + val.port_vlan = cport; + if(swlib_get_attr(dev, a, &val) < 0) + { + fprintf(stderr, "failed\n"); + retval = -1; + goto out; + } + switch(a->type) { + case SWITCH_TYPE_INT: + printf("%d\n", val.value.i); + break; + case SWITCH_TYPE_STRING: + printf("%s\n", val.value.s); + break; + case SWITCH_TYPE_PORTS: + for(i = 0; i < val.len; i++) + printf("%d ", val.value.ports[i]); + printf("\n"); + break; + } + } + +out: + swlib_free_all(dev); + free(ports); + + return 0; +} diff --git a/package/swconfig/src/swlib.c b/package/swconfig/src/swlib.c new file mode 100644 index 0000000000..3fde816414 --- /dev/null +++ b/package/swconfig/src/swlib.c @@ -0,0 +1,614 @@ +/* + * swlib.c: Switch configuration API (user space part) + * + * Copyright (C) 2008 Felix Fietkau + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include "swlib.h" + +//#define DEBUG 1 +#ifdef DEBUG +#define DPRINTF(fmt, ...) fprintf(stderr, "%s(%d): " fmt, __func__, __LINE__, ##__VA_ARGS__) +#else +#define DPRINTF(fmt, ...) do {} while (0) +#endif + +static struct nl_handle *handle; +static struct nl_cache *cache; +static struct genl_family *family; +static struct nlattr *tb[SWITCH_ATTR_MAX]; +static int refcount = 0; + +static struct nla_policy port_policy[] = { + [SWITCH_PORT_ID] = { .type = NLA_U32 }, + [SWITCH_PORT_FLAG_TAGGED] = { .type = NLA_FLAG }, +}; + +static inline void * +swlib_alloc(size_t size) +{ + void *ptr; + + ptr = malloc(size); + if (!ptr) + goto done; + memset(ptr, 0, size); + +done: + return ptr; +} + +static int +wait_handler(struct nl_msg *msg, void *arg) +{ + int *finished = arg; + + *finished = 1; + return NL_STOP; +} + +/* helper function for performing netlink requests */ +static int +swlib_call(int cmd, int (*call)(struct nl_msg *, void *), + int (*data)(struct nl_msg *, void *), void *arg) +{ + struct nl_msg *msg; + struct nl_cb *cb = NULL; + int finished; + int flags = 0; + int err; + + msg = nlmsg_alloc(); + if (!msg) { + fprintf(stderr, "Out of memory!\n"); + exit(1); + } + + if (!data) + flags |= NLM_F_DUMP; + + genlmsg_put(msg, NL_AUTO_PID, NL_AUTO_SEQ, genl_family_get_id(family), 0, flags, cmd, 0); + if (data) { + if (data(msg, arg) < 0) + goto nla_put_failure; + } + + cb = nl_cb_alloc(NL_CB_CUSTOM); + if (!cb) { + fprintf(stderr, "nl_cb_alloc failed.\n"); + exit(1); + } + + err = nl_send_auto_complete(handle, msg); + if (err < 0) { + fprintf(stderr, "nl_send_auto_complete failed: %d\n", err); + goto out; + } + + finished = 0; + + if (call) + nl_cb_set(cb, NL_CB_VALID, NL_CB_CUSTOM, call, arg); + + if (data) + nl_cb_set(cb, NL_CB_ACK, NL_CB_CUSTOM, wait_handler, &finished); + else + nl_cb_set(cb, NL_CB_FINISH, NL_CB_CUSTOM, wait_handler, &finished); + + err = nl_recvmsgs(handle, cb); + if (err < 0) { + goto out; + } + + if (!finished) + err = nl_wait_for_ack(handle); + +out: + if (cb) + nl_cb_put(cb); +nla_put_failure: + nlmsg_free(msg); + return err; +} + +static int +send_attr(struct nl_msg *msg, void *arg) +{ + struct switch_val *val = arg; + struct switch_attr *attr = val->attr; + + NLA_PUT_U32(msg, SWITCH_ATTR_ID, attr->dev->id); + NLA_PUT_U32(msg, SWITCH_ATTR_OP_ID, attr->id); + switch(attr->atype) { + case SWLIB_ATTR_GROUP_PORT: + NLA_PUT_U32(msg, SWITCH_ATTR_OP_PORT, val->port_vlan); + break; + case SWLIB_ATTR_GROUP_VLAN: + NLA_PUT_U32(msg, SWITCH_ATTR_OP_VLAN, val->port_vlan); + break; + default: + break; + } + + return 0; + +nla_put_failure: + return -1; +} + +static int +store_port_val(struct nl_msg *msg, struct nlattr *nla, struct switch_val *val) +{ + struct nlattr *p; + int ports = val->attr->dev->ports; + int err = 0; + int remaining; + + if (!val->value.ports) + val->value.ports = malloc(sizeof(struct switch_port) * ports); + + nla_for_each_nested(p, nla, remaining) { + struct nlattr *tb[SWITCH_PORT_ATTR_MAX+1]; + struct switch_port *port; + + if (val->len >= ports) + break; + + err = nla_parse_nested(tb, SWITCH_PORT_ATTR_MAX, p, port_policy); + if (err < 0) + goto out; + + if (!tb[SWITCH_PORT_ID]) + continue; + + port = &val->value.ports[val->len]; + port->id = nla_get_u32(tb[SWITCH_PORT_ID]); + port->flags = 0; + if (tb[SWITCH_PORT_FLAG_TAGGED]) + port->flags |= SWLIB_PORT_FLAG_TAGGED; + + val->len++; + } + +out: + return err; +} + +static int +store_val(struct nl_msg *msg, void *arg) +{ + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + struct switch_val *val = arg; + struct switch_attr *attr = val->attr; + + if (!val) + goto error; + + if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0), + genlmsg_attrlen(gnlh, 0), NULL) < 0) { + goto error; + } + + if (tb[SWITCH_ATTR_OP_VALUE_INT]) + val->value.i = nla_get_u32(tb[SWITCH_ATTR_OP_VALUE_INT]); + else if (tb[SWITCH_ATTR_OP_VALUE_STR]) + val->value.s = strdup(nla_get_string(tb[SWITCH_ATTR_OP_VALUE_STR])); + else if (tb[SWITCH_ATTR_OP_VALUE_PORTS]) + val->err = store_port_val(msg, tb[SWITCH_ATTR_OP_VALUE_PORTS], val); + + val->err = 0; + return 0; + +error: + return NL_SKIP; +} + +int +swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + int cmd; + int err; + + switch(attr->atype) { + case SWLIB_ATTR_GROUP_GLOBAL: + cmd = SWITCH_CMD_GET_GLOBAL; + break; + case SWLIB_ATTR_GROUP_PORT: + cmd = SWITCH_CMD_GET_PORT; + break; + case SWLIB_ATTR_GROUP_VLAN: + cmd = SWITCH_CMD_GET_VLAN; + break; + default: + return -EINVAL; + } + + memset(&val->value, 0, sizeof(val->value)); + val->len = 0; + val->attr = attr; + val->err = -EINVAL; + err = swlib_call(cmd, store_val, send_attr, val); + if (!err) + err = val->err; + + return err; +} + +static int +send_attr_ports(struct nl_msg *msg, struct switch_val *val) +{ + struct nlattr *n; + int i; + + /* TODO implement multipart? */ + if (val->len == 0) + goto done; + n = nla_nest_start(msg, SWITCH_ATTR_OP_VALUE_PORTS); + if (!n) + goto nla_put_failure; + for (i = 0; i < val->len; i++) { + struct switch_port *port = &val->value.ports[i]; + struct nlattr *np; + + np = nla_nest_start(msg, SWITCH_ATTR_PORT); + if (!np) + goto nla_put_failure; + + NLA_PUT_U32(msg, SWITCH_PORT_ID, port->id); + if (port->flags & SWLIB_PORT_FLAG_TAGGED) + NLA_PUT_FLAG(msg, SWITCH_PORT_FLAG_TAGGED); + + nla_nest_end(msg, np); + } + nla_nest_end(msg, n); +done: + return 0; + +nla_put_failure: + return -1; +} + +static int +send_attr_val(struct nl_msg *msg, void *arg) +{ + struct switch_val *val = arg; + struct switch_attr *attr = val->attr; + + if (send_attr(msg, arg)) + goto nla_put_failure; + + switch(attr->type) { + case SWITCH_TYPE_NOVAL: + break; + case SWITCH_TYPE_INT: + NLA_PUT_U32(msg, SWITCH_ATTR_OP_VALUE_INT, val->value.i); + break; + case SWITCH_TYPE_STRING: + if (!val->value.s) + goto nla_put_failure; + NLA_PUT_STRING(msg, SWITCH_ATTR_OP_VALUE_STR, val->value.s); + break; + case SWITCH_TYPE_PORTS: + if (send_attr_ports(msg, val) < 0) + goto nla_put_failure; + break; + default: + goto nla_put_failure; + } + return 0; + +nla_put_failure: + return -1; +} + +int +swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + int cmd; + + switch(attr->atype) { + case SWLIB_ATTR_GROUP_GLOBAL: + cmd = SWITCH_CMD_SET_GLOBAL; + break; + case SWLIB_ATTR_GROUP_PORT: + cmd = SWITCH_CMD_SET_PORT; + break; + case SWLIB_ATTR_GROUP_VLAN: + cmd = SWITCH_CMD_SET_VLAN; + break; + default: + return -EINVAL; + } + + val->attr = attr; + return swlib_call(cmd, NULL, send_attr_val, val); +} + + +struct attrlist_arg { + int id; + int atype; + struct switch_dev *dev; + struct switch_attr *prev; + struct switch_attr **head; +}; + +static int +add_id(struct nl_msg *msg, void *arg) +{ + struct attrlist_arg *l = arg; + + NLA_PUT_U32(msg, SWITCH_ATTR_ID, l->id); + + return 0; +nla_put_failure: + return -1; +} + +static int +add_attr(struct nl_msg *msg, void *ptr) +{ + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + struct attrlist_arg *arg = ptr; + struct switch_attr *new; + + if (nla_parse(tb, SWITCH_ATTR_MAX - 1, genlmsg_attrdata(gnlh, 0), + genlmsg_attrlen(gnlh, 0), NULL) < 0) + goto done; + + new = swlib_alloc(sizeof(struct switch_attr)); + if (!new) + goto done; + + new->dev = arg->dev; + new->atype = arg->atype; + if (arg->prev) { + arg->prev->next = new; + } else { + arg->prev = *arg->head; + } + *arg->head = new; + arg->head = &new->next; + + if (tb[SWITCH_ATTR_OP_ID]) + new->id = nla_get_u32(tb[SWITCH_ATTR_OP_ID]); + if (tb[SWITCH_ATTR_OP_TYPE]) + new->type = nla_get_u32(tb[SWITCH_ATTR_OP_TYPE]); + if (tb[SWITCH_ATTR_OP_NAME]) + new->name = strdup(nla_get_string(tb[SWITCH_ATTR_OP_NAME])); + if (tb[SWITCH_ATTR_OP_DESCRIPTION]) + new->description = strdup(nla_get_string(tb[SWITCH_ATTR_OP_DESCRIPTION])); + +done: + return NL_SKIP; +} + +int +swlib_scan(struct switch_dev *dev) +{ + struct attrlist_arg arg; + + if (dev->ops || dev->port_ops || dev->vlan_ops) + return 0; + + arg.atype = SWLIB_ATTR_GROUP_GLOBAL; + arg.dev = dev; + arg.id = dev->id; + arg.prev = NULL; + arg.head = &dev->ops; + swlib_call(SWITCH_CMD_LIST_GLOBAL, add_attr, add_id, &arg); + + arg.atype = SWLIB_ATTR_GROUP_PORT; + arg.prev = NULL; + arg.head = &dev->port_ops; + swlib_call(SWITCH_CMD_LIST_PORT, add_attr, add_id, &arg); + + arg.atype = SWLIB_ATTR_GROUP_VLAN; + arg.prev = NULL; + arg.head = &dev->vlan_ops; + swlib_call(SWITCH_CMD_LIST_VLAN, add_attr, add_id, &arg); + + return 0; +} + +struct switch_attr *swlib_lookup_attr(struct switch_dev *dev, + enum swlib_attr_group atype, const char *name) +{ + struct switch_attr *head; + + if (!name || !dev) + return NULL; + + switch(atype) { + case SWLIB_ATTR_GROUP_GLOBAL: + head = dev->ops; + break; + case SWLIB_ATTR_GROUP_PORT: + head = dev->port_ops; + break; + case SWLIB_ATTR_GROUP_VLAN: + head = dev->vlan_ops; + break; + } + while(head) { + if (!strcmp(name, head->name)) + return head; + head = head->next; + } + + return NULL; +} + +static void +swlib_priv_free(void) +{ + if (cache) + nl_cache_free(cache); + if (handle) + nl_handle_destroy(handle); + handle = NULL; + cache = NULL; +} + +static int +swlib_priv_init(void) +{ + handle = nl_handle_alloc(); + if (!handle) { + DPRINTF("Failed to create handle\n"); + goto err; + } + + if (genl_connect(handle)) { + DPRINTF("Failed to connect to generic netlink\n"); + goto err; + } + + cache = genl_ctrl_alloc_cache(handle); + if (!cache) { + DPRINTF("Failed to allocate netlink cache\n"); + goto err; + } + + family = genl_ctrl_search_by_name(cache, "switch"); + if (!family) { + DPRINTF("Switch API not present\n"); + goto err; + } + return 0; + +err: + swlib_priv_free(); + return -EINVAL; +} + +struct swlib_scan_arg { + const char *name; + struct switch_dev *head; + struct switch_dev *ptr; +}; + +static int +add_switch(struct nl_msg *msg, void *arg) +{ + struct swlib_scan_arg *sa = arg; + struct genlmsghdr *gnlh = nlmsg_data(nlmsg_hdr(msg)); + struct switch_dev *dev; + const char *name; + + if (nla_parse(tb, SWITCH_ATTR_MAX, genlmsg_attrdata(gnlh, 0), genlmsg_attrlen(gnlh, 0), NULL) < 0) + goto done; + + if (!tb[SWITCH_ATTR_DEV_NAME]) + goto done; + + name = nla_get_string(tb[SWITCH_ATTR_DEV_NAME]); + if (sa->name && (strcmp(name, sa->name) != 0)) + goto done; + + dev = swlib_alloc(sizeof(struct switch_dev)); + if (!dev) + goto done; + + dev->dev_name = strdup(name); + if (tb[SWITCH_ATTR_ID]) + dev->id = nla_get_u32(tb[SWITCH_ATTR_ID]); + if (tb[SWITCH_ATTR_NAME]) + dev->name = strdup(nla_get_string(tb[SWITCH_ATTR_DEV_NAME])); + if (tb[SWITCH_ATTR_PORTS]) + dev->ports = nla_get_u32(tb[SWITCH_ATTR_PORTS]); + if (tb[SWITCH_ATTR_VLANS]) + dev->vlans = nla_get_u32(tb[SWITCH_ATTR_VLANS]); + + if (!sa->head) { + sa->head = dev; + sa->ptr = dev; + } else { + sa->ptr->next = dev; + sa->ptr = dev; + } + + refcount++; +done: + return NL_SKIP; +} + + +struct switch_dev * +swlib_connect(const char *name) +{ + struct swlib_scan_arg arg; + int err; + + if (!refcount) { + if (swlib_priv_init() < 0) + return NULL; + }; + + arg.head = NULL; + arg.ptr = NULL; + arg.name = name; + swlib_call(SWITCH_CMD_GET_SWITCH, add_switch, NULL, &arg); + + if (!refcount) + swlib_priv_free(); + + return arg.head; +} + +static void +swlib_free_attributes(struct switch_attr **head) +{ + struct switch_attr *a = *head; + struct switch_attr *next; + + while (a) { + next = a->next; + free(a); + a = next; + } + *head = NULL; +} + +void +swlib_free(struct switch_dev *dev) +{ + swlib_free_attributes(&dev->ops); + swlib_free_attributes(&dev->port_ops); + swlib_free_attributes(&dev->vlan_ops); + free(dev); + + if (--refcount == 0) + swlib_priv_free(); +} + +void +swlib_free_all(struct switch_dev *dev) +{ + struct switch_dev *p; + + while (dev) { + p = dev->next; + swlib_free(dev); + dev = p; + } +} diff --git a/package/swconfig/src/swlib.h b/package/swconfig/src/swlib.h new file mode 100644 index 0000000000..e00ff47a51 --- /dev/null +++ b/package/swconfig/src/swlib.h @@ -0,0 +1,213 @@ +/* + * swlib.h: Switch configuration API (user space part) + * + * Copyright (C) 2008 Felix Fietkau + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public License + * version 2.1 as published by the Free Software Foundation. + * + * 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. + * + +Usage of the library functions: + + The main datastructure for a switch is the struct switch_device + To get started, you first need to use switch_connect() to probe + for switches and allocate an instance of this struct. + + There are two possible usage modes: + dev = switch_connect("eth0"); + - this call will look for a switch registered for the linux device + "eth0" and only allocate a switch_device for this particular switch. + + dev = switch_connect(NULL) + - this will return one switch_device struct for each available + switch. The switch_device structs are chained with by ->next pointer + + Then to query a switch for all available attributes, use: + swlib_scan(dev); + + All allocated datastructures for the switch_device struct can be freed with + swlib_free(dev); + or + swlib_free_all(dev); + + The latter traverses a whole chain of switch_device structs and frees them all + + Switch attributes (struct switch_attr) are divided into three groups: + dev->ops: + - global settings + dev->port_ops: + - per-port settings + dev->vlan_ops: + - per-vlan settings + + switch_lookup_attr() is a small helper function to locate attributes + by name. + + switch_set_attr() and switch_get_attr() can alter or request the values + of attributes. + +Usage of the switch_attr struct: + + ->atype: attribute group, one of: + - SWLIB_ATTR_GROUP_GLOBAL + - SWLIB_ATTR_GROUP_VLAN + - SWLIB_ATTR_GROUP_PORT + + ->id: identifier for the attribute + + ->type: data type, one of: + - SWITCH_TYPE_INT + - SWITCH_TYPE_STRING + - SWITCH_TYPE_PORT + + ->name: short name of the attribute + ->description: longer description + ->next: pointer to the next attribute of the current group + + +Usage of the switch_val struct: + + When setting attributes, following members of the struct switch_val need + to be set up: + + ->len (for attr->type == SWITCH_TYPE_PORT) + ->port_vlan: + - port number (for attr->atype == SWLIB_ATTR_GROUP_PORT), or: + - vlan number (for attr->atype == SWLIB_ATTR_GROUP_VLAN) + ->value.i (for attr->type == SWITCH_TYPE_INT) + ->value.s (for attr->type == SWITCH_TYPE_STRING) + - owned by the caller, not stored in the library internally + ->value.ports (for attr->type == SWITCH_TYPE_PORT) + - must point to an array of at lest val->len * sizeof(struct switch_port) + + When getting string attributes, val->value.s must be freed by the caller + When getting port list attributes, an internal static buffer is used, + which changes from call to call. + + */ + +#ifndef __SWLIB_H +#define __SWLIB_H + +enum swlib_attr_group { + SWLIB_ATTR_GROUP_GLOBAL, + SWLIB_ATTR_GROUP_VLAN, + SWLIB_ATTR_GROUP_PORT, +}; + +enum swlib_port_flags { + SWLIB_PORT_FLAG_TAGGED = (1 << 0), +}; + + +struct switch_dev; +struct switch_attr; +struct switch_port; +struct switch_val; + +struct switch_dev { + int id; + const char *name; + const char *dev_name; + int ports; + int vlans; + struct switch_attr *ops; + struct switch_attr *port_ops; + struct switch_attr *vlan_ops; + struct switch_dev *next; + void *priv; +}; + +struct switch_val { + struct switch_attr *attr; + int len; + int err; + int port_vlan; + union { + const char *s; + int i; + struct switch_port *ports; + } value; +}; + +struct switch_attr { + struct switch_dev *dev; + int atype; + int id; + int type; + const char *name; + const char *description; + struct switch_attr *next; +}; + +struct switch_port { + unsigned int id; + unsigned int flags; +}; + +/** + * swlib_connect: connect to the switch through netlink + * @name: name of the ethernet interface, + * + * if name is NULL, it connect and builds a chain of all switches + */ +struct switch_dev *swlib_connect(const char *name); + +/** + * swlib_free: free all dynamically allocated data for the switch connection + * @dev: switch device struct + * + * all members of a switch device chain (generated by swlib_connect(NULL)) + * must be freed individually + */ +void swlib_free(struct switch_dev *dev); + +/** + * swlib_free_all: run swlib_free on all devices in the chain + * @dev: switch device struct + */ +void swlib_free_all(struct switch_dev *dev); + +/** + * swlib_scan: probe the switch driver for available commands/attributes + * @dev: switch device struct + */ +int swlib_scan(struct switch_dev *dev); + +/** + * swlib_lookup_attr: look up a switch attribute + * @dev: switch device struct + * @type: global, port or vlan + * @name: name of the attribute + */ +struct switch_attr *swlib_lookup_attr(struct switch_dev *dev, + enum swlib_attr_group atype, const char *name); + +/** + * swlib_set_attr: set the value for an attribute + * @dev: switch device struct + * @attr: switch attribute struct + * @val: attribute value pointer + * returns 0 on success + */ +int swlib_set_attr(struct switch_dev *dev, struct switch_attr *attr, + struct switch_val *val); + +/** + * swlib_get_attr: get the value for an attribute + * @dev: switch device struct + * @attr: switch attribute struct + * @val: attribute value pointer + * returns 0 on success + * for string attributes, the result string must be freed by the caller + */ +int swlib_get_attr(struct switch_dev *dev, struct switch_attr *attr, + struct switch_val *val); + +#endif diff --git a/target/linux/generic-2.6/config-2.6.26 b/target/linux/generic-2.6/config-2.6.26 index 5335c2a341..7aa4bb7508 100644 --- a/target/linux/generic-2.6/config-2.6.26 +++ b/target/linux/generic-2.6/config-2.6.26 @@ -1538,6 +1538,7 @@ CONFIG_SUNRPC_GSS=m # CONFIG_SUN_PARTITION is not set CONFIG_SUSPEND_UP_POSSIBLE=y CONFIG_SWAP=y +# CONFIG_SWCONFIG is not set # CONFIG_SYNCLINK_CS is not set CONFIG_SYN_COOKIES=y CONFIG_SYSCTL=y diff --git a/target/linux/generic-2.6/config-2.6.27 b/target/linux/generic-2.6/config-2.6.27 index 198b62a615..7b2a4b6039 100644 --- a/target/linux/generic-2.6/config-2.6.27 +++ b/target/linux/generic-2.6/config-2.6.27 @@ -1580,6 +1580,7 @@ CONFIG_SUNRPC_GSS=m # CONFIG_SUN_PARTITION is not set CONFIG_SUSPEND_UP_POSSIBLE=y CONFIG_SWAP=y +# CONFIG_SWCONFIG is not set # CONFIG_SYNCLINK_CS is not set CONFIG_SYN_COOKIES=y CONFIG_SYSCTL=y diff --git a/target/linux/generic-2.6/files-2.6.26/drivers/net/phy/swconfig.c b/target/linux/generic-2.6/files-2.6.26/drivers/net/phy/swconfig.c new file mode 100644 index 0000000000..ade28429dc --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.26/drivers/net/phy/swconfig.c @@ -0,0 +1,872 @@ +/* + * swconfig.c: Switch configuration API + * + * Copyright (C) 2008 Felix Fietkau + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +//#define DEBUG 1 +#ifdef DEBUG +#define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__) +#else +#define DPRINTF(...) do {} while(0) +#endif + +MODULE_AUTHOR("Felix Fietkau "); +MODULE_LICENSE("GPL"); + +static int swdev_id = 0; +static struct list_head swdevs; +static spinlock_t swdevs_lock = SPIN_LOCK_UNLOCKED; +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, struct switch_attr *attr, struct switch_val *val) +{ + int ret; + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + if (!dev->get_vlan_ports) + return -EOPNOTSUPP; + + ret = dev->get_vlan_ports(dev, val); + printk("SET PORTS %d\n", val->len); + return ret; +} + +static int +swconfig_set_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + int i; + + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + /* validate ports */ + if (val->len > dev->ports) + return -EINVAL; + + for (i = 0; i < val->len; i++) { + if (val->value.ports[i].id >= dev->ports) + return -EINVAL; + } + + if (!dev->set_vlan_ports) + return -EOPNOTSUPP; + + printk("SET PORTS %d\n", val->len); + return dev->set_vlan_ports(dev, val); +} + +static int +swconfig_apply_config(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + /* don't complain if not supported by the switch driver */ + if (!dev->apply_config) + return 0; + + return dev->apply_config(dev); +} + + +enum global_defaults { + GLOBAL_APPLY, +}; + +enum vlan_defaults { + VLAN_PORTS, +}; + +enum port_defaults { + 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, + } +}; + +static struct switch_attr default_port[] = { + [PORT_LINK] = { + .type = SWITCH_TYPE_INT, + .name = "link", + .description = "Current link speed", + } +}; + +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 void swconfig_defaults_init(struct switch_dev *dev) +{ + dev->def_global = 0; + dev->def_vlan = 0; + dev->def_port = 0; + + if (dev->get_vlan_ports || dev->set_vlan_ports) + set_bit(VLAN_PORTS, &dev->def_vlan); + + /* always present, can be no-op */ + set_bit(GLOBAL_APPLY, &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) + spin_lock(&dev->lock); + else + DPRINTF("device %d not found\n", id); + swconfig_unlock(); +done: + return dev; +} + +static inline void +swconfig_put_dev(struct switch_dev *dev) +{ + spin_unlock(&dev->lock); +} + +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_unicast(cb->msg, info->snd_pid); + 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->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->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->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, &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, &def_list[i]); + if (err < 0) + goto error; + } + swconfig_put_dev(dev); + + if (!cb.msg) + return 0; + + return genlmsg_unicast(cb.msg, info->snd_pid); + +error: + if (cb.msg) + nlmsg_free(cb.msg); +out: + swconfig_put_dev(dev); + return err; +} + +static 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; + 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->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->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]); + break; + case SWITCH_CMD_SET_PORT: + case SWITCH_CMD_GET_PORT: + alist = &dev->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]); + 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) +{ + 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); + 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_dev; + + 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_unicast(msg, info->snd_pid); + +nla_put_failure: + if (msg) + nlmsg_free(msg); +error_dev: + swconfig_put_dev(dev); +error: + 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_NAME, dev->name); + NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname); + NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans); + NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports); + + 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) +{ + INIT_LIST_HEAD(&dev->dev_list); + if (netdev) { + dev->netdev = netdev; + if (!dev->devname) + dev->devname = netdev->name; + } + BUG_ON(!dev->devname); + + if (dev->ports > 0) { + dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports, + GFP_KERNEL); + if (!dev->portbuf) + return -ENOMEM; + } + dev->id = ++swdev_id; + swconfig_defaults_init(dev); + spin_lock_init(&dev->lock); + swconfig_lock(); + list_add(&dev->dev_list, &swdevs); + swconfig_unlock(); + + return 0; +} +EXPORT_SYMBOL_GPL(register_switch); + +void +unregister_switch(struct switch_dev *dev) +{ + kfree(dev->portbuf); + spin_lock(&dev->lock); + swconfig_lock(); + list_del(&dev->dev_list); + swconfig_unlock(); +} +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); + diff --git a/target/linux/generic-2.6/files-2.6.26/include/linux/switch.h b/target/linux/generic-2.6/files-2.6.26/include/linux/switch.h new file mode 100644 index 0000000000..9411e84bc2 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.26/include/linux/switch.h @@ -0,0 +1,168 @@ +/* + * switch.h: Switch configuration API + * + * Copyright (C) 2008 Felix Fietkau + * + * 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. + */ + +#ifndef __LINUX_SWITCH_H +#define __LINUX_SWITCH_H + +#include +#include +#include +#include +#ifndef __KERNEL__ +#include +#include +#include +#else +#include +#endif + +/* main attributes */ +enum { + SWITCH_ATTR_UNSPEC, + /* global */ + SWITCH_ATTR_TYPE, + /* device */ + SWITCH_ATTR_ID, + SWITCH_ATTR_NAME, + SWITCH_ATTR_DEV_NAME, + SWITCH_ATTR_VLANS, + SWITCH_ATTR_PORTS, + /* attributes */ + SWITCH_ATTR_OP_ID, + SWITCH_ATTR_OP_TYPE, + SWITCH_ATTR_OP_NAME, + SWITCH_ATTR_OP_PORT, + SWITCH_ATTR_OP_VLAN, + SWITCH_ATTR_OP_VALUE_INT, + SWITCH_ATTR_OP_VALUE_STR, + SWITCH_ATTR_OP_VALUE_PORTS, + SWITCH_ATTR_OP_DESCRIPTION, + /* port lists */ + SWITCH_ATTR_PORT, + SWITCH_ATTR_MAX +}; + +/* commands */ +enum { + SWITCH_CMD_UNSPEC, + SWITCH_CMD_GET_SWITCH, + SWITCH_CMD_NEW_ATTR, + SWITCH_CMD_LIST_GLOBAL, + SWITCH_CMD_GET_GLOBAL, + SWITCH_CMD_SET_GLOBAL, + SWITCH_CMD_LIST_PORT, + SWITCH_CMD_GET_PORT, + SWITCH_CMD_SET_PORT, + SWITCH_CMD_LIST_VLAN, + SWITCH_CMD_GET_VLAN, + SWITCH_CMD_SET_VLAN +}; + +/* data types */ +enum switch_val_type { + SWITCH_TYPE_UNSPEC, + SWITCH_TYPE_INT, + SWITCH_TYPE_STRING, + SWITCH_TYPE_PORTS, + SWITCH_TYPE_NOVAL, +}; + +/* port nested attributes */ +enum { + SWITCH_PORT_UNSPEC, + SWITCH_PORT_ID, + SWITCH_PORT_FLAG_TAGGED, + SWITCH_PORT_ATTR_MAX +}; + +#define SWITCH_ATTR_DEFAULTS_OFFSET 0x1000 + +#ifdef __KERNEL__ + +struct switch_dev; +struct switch_op; +struct switch_val; +struct switch_attr; +struct switch_attrlist; + +int register_switch(struct switch_dev *dev, struct net_device *netdev); +void unregister_switch(struct switch_dev *dev); + +struct switch_attrlist { + /* filled in by the driver */ + int n_attr; + struct switch_attr *attr; +}; + + +struct switch_dev { + int id; + void *priv; + const char *name; + + /* NB: either devname or netdev must be set */ + const char *devname; + struct net_device *netdev; + + int ports; + int vlans; + int cpu_port; + struct switch_attrlist attr_global, attr_port, attr_vlan; + + spinlock_t lock; + struct switch_port *portbuf; + struct list_head dev_list; + unsigned long def_global, def_port, def_vlan; + + int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val); + int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val); + int (*apply_config)(struct switch_dev *dev); +}; + +struct switch_port { + u32 id; + u32 flags; +}; + +struct switch_val { + struct switch_attr *attr; + int port_vlan; + int len; + union { + const char *s; + u32 i; + struct switch_port *ports; + } value; +}; + +struct switch_attr { + int disabled; + int type; + const char *name; + const char *description; + + int (*set)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val); + int (*get)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val); + + /* for driver internal use */ + int id; + int ofs; + int max; +}; + +#endif + +#endif diff --git a/target/linux/generic-2.6/files-2.6.27/drivers/net/phy/swconfig.c b/target/linux/generic-2.6/files-2.6.27/drivers/net/phy/swconfig.c new file mode 100644 index 0000000000..ade28429dc --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.27/drivers/net/phy/swconfig.c @@ -0,0 +1,872 @@ +/* + * swconfig.c: Switch configuration API + * + * Copyright (C) 2008 Felix Fietkau + * + * 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 +#include +#include +#include +#include +#include +#include +#include +#include + +//#define DEBUG 1 +#ifdef DEBUG +#define DPRINTF(format, ...) printk("%s: " format, __func__, ##__VA_ARGS__) +#else +#define DPRINTF(...) do {} while(0) +#endif + +MODULE_AUTHOR("Felix Fietkau "); +MODULE_LICENSE("GPL"); + +static int swdev_id = 0; +static struct list_head swdevs; +static spinlock_t swdevs_lock = SPIN_LOCK_UNLOCKED; +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, struct switch_attr *attr, struct switch_val *val) +{ + int ret; + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + if (!dev->get_vlan_ports) + return -EOPNOTSUPP; + + ret = dev->get_vlan_ports(dev, val); + printk("SET PORTS %d\n", val->len); + return ret; +} + +static int +swconfig_set_vlan_ports(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + int i; + + if (val->port_vlan >= dev->vlans) + return -EINVAL; + + /* validate ports */ + if (val->len > dev->ports) + return -EINVAL; + + for (i = 0; i < val->len; i++) { + if (val->value.ports[i].id >= dev->ports) + return -EINVAL; + } + + if (!dev->set_vlan_ports) + return -EOPNOTSUPP; + + printk("SET PORTS %d\n", val->len); + return dev->set_vlan_ports(dev, val); +} + +static int +swconfig_apply_config(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val) +{ + /* don't complain if not supported by the switch driver */ + if (!dev->apply_config) + return 0; + + return dev->apply_config(dev); +} + + +enum global_defaults { + GLOBAL_APPLY, +}; + +enum vlan_defaults { + VLAN_PORTS, +}; + +enum port_defaults { + 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, + } +}; + +static struct switch_attr default_port[] = { + [PORT_LINK] = { + .type = SWITCH_TYPE_INT, + .name = "link", + .description = "Current link speed", + } +}; + +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 void swconfig_defaults_init(struct switch_dev *dev) +{ + dev->def_global = 0; + dev->def_vlan = 0; + dev->def_port = 0; + + if (dev->get_vlan_ports || dev->set_vlan_ports) + set_bit(VLAN_PORTS, &dev->def_vlan); + + /* always present, can be no-op */ + set_bit(GLOBAL_APPLY, &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) + spin_lock(&dev->lock); + else + DPRINTF("device %d not found\n", id); + swconfig_unlock(); +done: + return dev; +} + +static inline void +swconfig_put_dev(struct switch_dev *dev) +{ + spin_unlock(&dev->lock); +} + +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_unicast(cb->msg, info->snd_pid); + 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->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->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->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, &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, &def_list[i]); + if (err < 0) + goto error; + } + swconfig_put_dev(dev); + + if (!cb.msg) + return 0; + + return genlmsg_unicast(cb.msg, info->snd_pid); + +error: + if (cb.msg) + nlmsg_free(cb.msg); +out: + swconfig_put_dev(dev); + return err; +} + +static 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; + 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->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->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]); + break; + case SWITCH_CMD_SET_PORT: + case SWITCH_CMD_GET_PORT: + alist = &dev->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]); + 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) +{ + 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); + 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_dev; + + 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_unicast(msg, info->snd_pid); + +nla_put_failure: + if (msg) + nlmsg_free(msg); +error_dev: + swconfig_put_dev(dev); +error: + 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_NAME, dev->name); + NLA_PUT_STRING(msg, SWITCH_ATTR_DEV_NAME, dev->devname); + NLA_PUT_U32(msg, SWITCH_ATTR_VLANS, dev->vlans); + NLA_PUT_U32(msg, SWITCH_ATTR_PORTS, dev->ports); + + 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) +{ + INIT_LIST_HEAD(&dev->dev_list); + if (netdev) { + dev->netdev = netdev; + if (!dev->devname) + dev->devname = netdev->name; + } + BUG_ON(!dev->devname); + + if (dev->ports > 0) { + dev->portbuf = kzalloc(sizeof(struct switch_port) * dev->ports, + GFP_KERNEL); + if (!dev->portbuf) + return -ENOMEM; + } + dev->id = ++swdev_id; + swconfig_defaults_init(dev); + spin_lock_init(&dev->lock); + swconfig_lock(); + list_add(&dev->dev_list, &swdevs); + swconfig_unlock(); + + return 0; +} +EXPORT_SYMBOL_GPL(register_switch); + +void +unregister_switch(struct switch_dev *dev) +{ + kfree(dev->portbuf); + spin_lock(&dev->lock); + swconfig_lock(); + list_del(&dev->dev_list); + swconfig_unlock(); +} +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); + diff --git a/target/linux/generic-2.6/files-2.6.27/include/linux/switch.h b/target/linux/generic-2.6/files-2.6.27/include/linux/switch.h new file mode 100644 index 0000000000..9411e84bc2 --- /dev/null +++ b/target/linux/generic-2.6/files-2.6.27/include/linux/switch.h @@ -0,0 +1,168 @@ +/* + * switch.h: Switch configuration API + * + * Copyright (C) 2008 Felix Fietkau + * + * 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. + */ + +#ifndef __LINUX_SWITCH_H +#define __LINUX_SWITCH_H + +#include +#include +#include +#include +#ifndef __KERNEL__ +#include +#include +#include +#else +#include +#endif + +/* main attributes */ +enum { + SWITCH_ATTR_UNSPEC, + /* global */ + SWITCH_ATTR_TYPE, + /* device */ + SWITCH_ATTR_ID, + SWITCH_ATTR_NAME, + SWITCH_ATTR_DEV_NAME, + SWITCH_ATTR_VLANS, + SWITCH_ATTR_PORTS, + /* attributes */ + SWITCH_ATTR_OP_ID, + SWITCH_ATTR_OP_TYPE, + SWITCH_ATTR_OP_NAME, + SWITCH_ATTR_OP_PORT, + SWITCH_ATTR_OP_VLAN, + SWITCH_ATTR_OP_VALUE_INT, + SWITCH_ATTR_OP_VALUE_STR, + SWITCH_ATTR_OP_VALUE_PORTS, + SWITCH_ATTR_OP_DESCRIPTION, + /* port lists */ + SWITCH_ATTR_PORT, + SWITCH_ATTR_MAX +}; + +/* commands */ +enum { + SWITCH_CMD_UNSPEC, + SWITCH_CMD_GET_SWITCH, + SWITCH_CMD_NEW_ATTR, + SWITCH_CMD_LIST_GLOBAL, + SWITCH_CMD_GET_GLOBAL, + SWITCH_CMD_SET_GLOBAL, + SWITCH_CMD_LIST_PORT, + SWITCH_CMD_GET_PORT, + SWITCH_CMD_SET_PORT, + SWITCH_CMD_LIST_VLAN, + SWITCH_CMD_GET_VLAN, + SWITCH_CMD_SET_VLAN +}; + +/* data types */ +enum switch_val_type { + SWITCH_TYPE_UNSPEC, + SWITCH_TYPE_INT, + SWITCH_TYPE_STRING, + SWITCH_TYPE_PORTS, + SWITCH_TYPE_NOVAL, +}; + +/* port nested attributes */ +enum { + SWITCH_PORT_UNSPEC, + SWITCH_PORT_ID, + SWITCH_PORT_FLAG_TAGGED, + SWITCH_PORT_ATTR_MAX +}; + +#define SWITCH_ATTR_DEFAULTS_OFFSET 0x1000 + +#ifdef __KERNEL__ + +struct switch_dev; +struct switch_op; +struct switch_val; +struct switch_attr; +struct switch_attrlist; + +int register_switch(struct switch_dev *dev, struct net_device *netdev); +void unregister_switch(struct switch_dev *dev); + +struct switch_attrlist { + /* filled in by the driver */ + int n_attr; + struct switch_attr *attr; +}; + + +struct switch_dev { + int id; + void *priv; + const char *name; + + /* NB: either devname or netdev must be set */ + const char *devname; + struct net_device *netdev; + + int ports; + int vlans; + int cpu_port; + struct switch_attrlist attr_global, attr_port, attr_vlan; + + spinlock_t lock; + struct switch_port *portbuf; + struct list_head dev_list; + unsigned long def_global, def_port, def_vlan; + + int (*get_vlan_ports)(struct switch_dev *dev, struct switch_val *val); + int (*set_vlan_ports)(struct switch_dev *dev, struct switch_val *val); + int (*apply_config)(struct switch_dev *dev); +}; + +struct switch_port { + u32 id; + u32 flags; +}; + +struct switch_val { + struct switch_attr *attr; + int port_vlan; + int len; + union { + const char *s; + u32 i; + struct switch_port *ports; + } value; +}; + +struct switch_attr { + int disabled; + int type; + const char *name; + const char *description; + + int (*set)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val); + int (*get)(struct switch_dev *dev, struct switch_attr *attr, struct switch_val *val); + + /* for driver internal use */ + int id; + int ofs; + int max; +}; + +#endif + +#endif diff --git a/target/linux/generic-2.6/patches-2.6.26/650-swconfig.patch b/target/linux/generic-2.6/patches-2.6.26/650-swconfig.patch new file mode 100644 index 0000000000..6825037ce9 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.26/650-swconfig.patch @@ -0,0 +1,25 @@ +--- a/drivers/net/phy/Kconfig ++++ b/drivers/net/phy/Kconfig +@@ -13,6 +13,12 @@ menuconfig PHYLIB + + if PHYLIB + ++config SWCONFIG ++ tristate "Switch configuration API" ++ ---help--- ++ Switch configuration API using netlink. This allows ++ you to configure the VLAN features of certain switches. ++ + comment "MII PHY device drivers" + + config MARVELL_PHY +--- a/drivers/net/phy/Makefile ++++ b/drivers/net/phy/Makefile +@@ -3,6 +3,7 @@ + libphy-objs := phy.o phy_device.o mdio_bus.o + + obj-$(CONFIG_PHYLIB) += libphy.o ++obj-$(CONFIG_SWCONFIG) += swconfig.o + obj-$(CONFIG_MARVELL_PHY) += marvell.o + obj-$(CONFIG_DAVICOM_PHY) += davicom.o + obj-$(CONFIG_CICADA_PHY) += cicada.o diff --git a/target/linux/generic-2.6/patches-2.6.27/650-swconfig.patch b/target/linux/generic-2.6/patches-2.6.27/650-swconfig.patch new file mode 100644 index 0000000000..6825037ce9 --- /dev/null +++ b/target/linux/generic-2.6/patches-2.6.27/650-swconfig.patch @@ -0,0 +1,25 @@ +--- a/drivers/net/phy/Kconfig ++++ b/drivers/net/phy/Kconfig +@@ -13,6 +13,12 @@ menuconfig PHYLIB + + if PHYLIB + ++config SWCONFIG ++ tristate "Switch configuration API" ++ ---help--- ++ Switch configuration API using netlink. This allows ++ you to configure the VLAN features of certain switches. ++ + comment "MII PHY device drivers" + + config MARVELL_PHY +--- a/drivers/net/phy/Makefile ++++ b/drivers/net/phy/Makefile +@@ -3,6 +3,7 @@ + libphy-objs := phy.o phy_device.o mdio_bus.o + + obj-$(CONFIG_PHYLIB) += libphy.o ++obj-$(CONFIG_SWCONFIG) += swconfig.o + obj-$(CONFIG_MARVELL_PHY) += marvell.o + obj-$(CONFIG_DAVICOM_PHY) += davicom.o + obj-$(CONFIG_CICADA_PHY) += cicada.o