diff options
Diffstat (limited to 'linux-2.6-xen-sparse/net/core/dev.c')
| -rw-r--r-- | linux-2.6-xen-sparse/net/core/dev.c | 3660 |
1 files changed, 0 insertions, 3660 deletions
diff --git a/linux-2.6-xen-sparse/net/core/dev.c b/linux-2.6-xen-sparse/net/core/dev.c deleted file mode 100644 index ec002f7424..0000000000 --- a/linux-2.6-xen-sparse/net/core/dev.c +++ /dev/null @@ -1,3660 +0,0 @@ -/* - * NET3 Protocol independent device support routines. - * - * 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. - * - * Derived from the non IP parts of dev.c 1.0.19 - * Authors: Ross Biro - * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> - * Mark Evans, <evansmp@uhura.aston.ac.uk> - * - * Additional Authors: - * Florian la Roche <rzsfl@rz.uni-sb.de> - * Alan Cox <gw4pts@gw4pts.ampr.org> - * David Hinds <dahinds@users.sourceforge.net> - * Alexey Kuznetsov <kuznet@ms2.inr.ac.ru> - * Adam Sulmicki <adam@cfar.umd.edu> - * Pekka Riikonen <priikone@poesidon.pspt.fi> - * - * Changes: - * D.J. Barrow : Fixed bug where dev->refcnt gets set - * to 2 if register_netdev gets called - * before net_dev_init & also removed a - * few lines of code in the process. - * Alan Cox : device private ioctl copies fields back. - * Alan Cox : Transmit queue code does relevant - * stunts to keep the queue safe. - * Alan Cox : Fixed double lock. - * Alan Cox : Fixed promisc NULL pointer trap - * ???????? : Support the full private ioctl range - * Alan Cox : Moved ioctl permission check into - * drivers - * Tim Kordas : SIOCADDMULTI/SIOCDELMULTI - * Alan Cox : 100 backlog just doesn't cut it when - * you start doing multicast video 8) - * Alan Cox : Rewrote net_bh and list manager. - * Alan Cox : Fix ETH_P_ALL echoback lengths. - * Alan Cox : Took out transmit every packet pass - * Saved a few bytes in the ioctl handler - * Alan Cox : Network driver sets packet type before - * calling netif_rx. Saves a function - * call a packet. - * Alan Cox : Hashed net_bh() - * Richard Kooijman: Timestamp fixes. - * Alan Cox : Wrong field in SIOCGIFDSTADDR - * Alan Cox : Device lock protection. - * Alan Cox : Fixed nasty side effect of device close - * changes. - * Rudi Cilibrasi : Pass the right thing to - * set_mac_address() - * Dave Miller : 32bit quantity for the device lock to - * make it work out on a Sparc. - * Bjorn Ekwall : Added KERNELD hack. - * Alan Cox : Cleaned up the backlog initialise. - * Craig Metz : SIOCGIFCONF fix if space for under - * 1 device. - * Thomas Bogendoerfer : Return ENODEV for dev_open, if there - * is no device open function. - * Andi Kleen : Fix error reporting for SIOCGIFCONF - * Michael Chastain : Fix signed/unsigned for SIOCGIFCONF - * Cyrus Durgin : Cleaned for KMOD - * Adam Sulmicki : Bug Fix : Network Device Unload - * A network device unload needs to purge - * the backlog queue. - * Paul Rusty Russell : SIOCSIFNAME - * Pekka Riikonen : Netdev boot-time settings code - * Andrew Morton : Make unregister_netdevice wait - * indefinitely on dev->refcnt - * J Hadi Salim : - Backlog queue sampling - * - netif_rx() feedback - */ - -#include <asm/uaccess.h> -#include <asm/system.h> -#include <linux/bitops.h> -#include <linux/capability.h> -#include <linux/cpu.h> -#include <linux/types.h> -#include <linux/kernel.h> -#include <linux/sched.h> -#include <linux/mutex.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/socket.h> -#include <linux/sockios.h> -#include <linux/errno.h> -#include <linux/interrupt.h> -#include <linux/if_ether.h> -#include <linux/netdevice.h> -#include <linux/etherdevice.h> -#include <linux/notifier.h> -#include <linux/skbuff.h> -#include <net/sock.h> -#include <linux/rtnetlink.h> -#include <linux/proc_fs.h> -#include <linux/seq_file.h> -#include <linux/stat.h> -#include <linux/if_bridge.h> -#include <linux/divert.h> -#include <net/dst.h> -#include <net/pkt_sched.h> -#include <net/checksum.h> -#include <linux/highmem.h> -#include <linux/init.h> -#include <linux/kmod.h> -#include <linux/module.h> -#include <linux/kallsyms.h> -#include <linux/netpoll.h> -#include <linux/rcupdate.h> -#include <linux/delay.h> -#include <linux/wireless.h> -#include <net/iw_handler.h> -#include <asm/current.h> -#include <linux/err.h> -#include <linux/audit.h> -#include <linux/dmaengine.h> -#include <linux/err.h> -#include <linux/ctype.h> - -#ifdef CONFIG_XEN -#include <net/ip.h> -#include <linux/tcp.h> -#include <linux/udp.h> -#endif - -/* - * The list of packet types we will receive (as opposed to discard) - * and the routines to invoke. - * - * Why 16. Because with 16 the only overlap we get on a hash of the - * low nibble of the protocol value is RARP/SNAP/X.25. - * - * NOTE: That is no longer true with the addition of VLAN tags. Not - * sure which should go first, but I bet it won't make much - * difference if we are running VLANs. The good news is that - * this protocol won't be in the list unless compiled in, so - * the average user (w/out VLANs) will not be adversely affected. - * --BLG - * - * 0800 IP - * 8100 802.1Q VLAN - * 0001 802.3 - * 0002 AX.25 - * 0004 802.2 - * 8035 RARP - * 0005 SNAP - * 0805 X.25 - * 0806 ARP - * 8137 IPX - * 0009 Localtalk - * 86DD IPv6 - */ - -static DEFINE_SPINLOCK(ptype_lock); -static struct list_head ptype_base[16]; /* 16 way hashed list */ -static struct list_head ptype_all; /* Taps */ - -#ifdef CONFIG_NET_DMA -static struct dma_client *net_dma_client; -static unsigned int net_dma_count; -static spinlock_t net_dma_event_lock; -#endif - -/* - * The @dev_base list is protected by @dev_base_lock and the rtnl - * semaphore. - * - * Pure readers hold dev_base_lock for reading. - * - * Writers must hold the rtnl semaphore while they loop through the - * dev_base list, and hold dev_base_lock for writing when they do the - * actual updates. This allows pure readers to access the list even - * while a writer is preparing to update it. - * - * To put it another way, dev_base_lock is held for writing only to - * protect against pure readers; the rtnl semaphore provides the - * protection against other writers. - * - * See, for example usages, register_netdevice() and - * unregister_netdevice(), which must be called with the rtnl - * semaphore held. - */ -struct net_device *dev_base; -static struct net_device **dev_tail = &dev_base; -DEFINE_RWLOCK(dev_base_lock); - -EXPORT_SYMBOL(dev_base); -EXPORT_SYMBOL(dev_base_lock); - -#define NETDEV_HASHBITS 8 -static struct hlist_head dev_name_head[1<<NETDEV_HASHBITS]; -static struct hlist_head dev_index_head[1<<NETDEV_HASHBITS]; - -static inline struct hlist_head *dev_name_hash(const char *name) -{ - unsigned hash = full_name_hash(name, strnlen(name, IFNAMSIZ)); - return &dev_name_head[hash & ((1<<NETDEV_HASHBITS)-1)]; -} - -static inline struct hlist_head *dev_index_hash(int ifindex) -{ - return &dev_index_head[ifindex & ((1<<NETDEV_HASHBITS)-1)]; -} - -/* - * Our notifier list - */ - -static RAW_NOTIFIER_HEAD(netdev_chain); - -/* - * Device drivers call our routines to queue packets here. We empty the - * queue in the local softnet handler. - */ -DEFINE_PER_CPU(struct softnet_data, softnet_data) = { NULL }; - -#ifdef CONFIG_SYSFS -extern int netdev_sysfs_init(void); -extern int netdev_register_sysfs(struct net_device *); -extern void netdev_unregister_sysfs(struct net_device *); -#else -#define netdev_sysfs_init() (0) -#define netdev_register_sysfs(dev) (0) -#define netdev_unregister_sysfs(dev) do { } while(0) -#endif - - -/******************************************************************************* - - Protocol management and registration routines - -*******************************************************************************/ - -/* - * For efficiency - */ - -static int netdev_nit; - -/* - * Add a protocol ID to the list. Now that the input handler is - * smarter we can dispense with all the messy stuff that used to be - * here. - * - * BEWARE!!! Protocol handlers, mangling input packets, - * MUST BE last in hash buckets and checking protocol handlers - * MUST start from promiscuous ptype_all chain in net_bh. - * It is true now, do not change it. - * Explanation follows: if protocol handler, mangling packet, will - * be the first on list, it is not able to sense, that packet - * is cloned and should be copied-on-write, so that it will - * change it and subsequent readers will get broken packet. - * --ANK (980803) - */ - -/** - * dev_add_pack - add packet handler - * @pt: packet type declaration - * - * Add a protocol handler to the networking stack. The passed &packet_type - * is linked into kernel lists and may not be freed until it has been - * removed from the kernel lists. - * - * This call does not sleep therefore it can not - * guarantee all CPU's that are in middle of receiving packets - * will see the new packet type (until the next received packet). - */ - -void dev_add_pack(struct packet_type *pt) -{ - int hash; - - spin_lock_bh(&ptype_lock); - if (pt->type == htons(ETH_P_ALL)) { - netdev_nit++; - list_add_rcu(&pt->list, &ptype_all); - } else { - hash = ntohs(pt->type) & 15; - list_add_rcu(&pt->list, &ptype_base[hash]); - } - spin_unlock_bh(&ptype_lock); -} - -/** - * __dev_remove_pack - remove packet handler - * @pt: packet type declaration - * - * Remove a protocol handler that was previously added to the kernel - * protocol handlers by dev_add_pack(). The passed &packet_type is removed - * from the kernel lists and can be freed or reused once this function - * returns. - * - * The packet type might still be in use by receivers - * and must not be freed until after all the CPU's have gone - * through a quiescent state. - */ -void __dev_remove_pack(struct packet_type *pt) -{ - struct list_head *head; - struct packet_type *pt1; - - spin_lock_bh(&ptype_lock); - - if (pt->type == htons(ETH_P_ALL)) { - netdev_nit--; - head = &ptype_all; - } else - head = &ptype_base[ntohs(pt->type) & 15]; - - list_for_each_entry(pt1, head, list) { - if (pt == pt1) { - list_del_rcu(&pt->list); - goto out; - } - } - - printk(KERN_WARNING "dev_remove_pack: %p not found.\n", pt); -out: - spin_unlock_bh(&ptype_lock); -} -/** - * dev_remove_pack - remove packet handler - * @pt: packet type declaration - * - * Remove a protocol handler that was previously added to the kernel - * protocol handlers by dev_add_pack(). The passed &packet_type is removed - * from the kernel lists and can be freed or reused once this function - * returns. - * - * This call sleeps to guarantee that no CPU is looking at the packet - * type after return. - */ -void dev_remove_pack(struct packet_type *pt) -{ - __dev_remove_pack(pt); - - synchronize_net(); -} - -/****************************************************************************** - - Device Boot-time Settings Routines - -*******************************************************************************/ - -/* Boot time configuration table */ -static struct netdev_boot_setup dev_boot_setup[NETDEV_BOOT_SETUP_MAX]; - -/** - * netdev_boot_setup_add - add new setup entry - * @name: name of the device - * @map: configured settings for the device - * - * Adds new setup entry to the dev_boot_setup list. The function - * returns 0 on error and 1 on success. This is a generic routine to - * all netdevices. - */ -static int netdev_boot_setup_add(char *name, struct ifmap *map) -{ - struct netdev_boot_setup *s; - int i; - - s = dev_boot_setup; - for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { - if (s[i].name[0] == '\0' || s[i].name[0] == ' ') { - memset(s[i].name, 0, sizeof(s[i].name)); - strcpy(s[i].name, name); - memcpy(&s[i].map, map, sizeof(s[i].map)); - break; - } - } - - return i >= NETDEV_BOOT_SETUP_MAX ? 0 : 1; -} - -/** - * netdev_boot_setup_check - check boot time settings - * @dev: the netdevice - * - * Check boot time settings for the device. - * The found settings are set for the device to be used - * later in the device probing. - * Returns 0 if no settings found, 1 if they are. - */ -int netdev_boot_setup_check(struct net_device *dev) -{ - struct netdev_boot_setup *s = dev_boot_setup; - int i; - - for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) { - if (s[i].name[0] != '\0' && s[i].name[0] != ' ' && - !strncmp(dev->name, s[i].name, strlen(s[i].name))) { - dev->irq = s[i].map.irq; - dev->base_addr = s[i].map.base_addr; - dev->mem_start = s[i].map.mem_start; - dev->mem_end = s[i].map.mem_end; - return 1; - } - } - return 0; -} - - -/** - * netdev_boot_base - get address from boot time settings - * @prefix: prefix for network device - * @unit: id for network device - * - * Check boot time settings for the base address of device. - * The found settings are set for the device to be used - * later in the device probing. - * Returns 0 if no settings found. - */ -unsigned long netdev_boot_base(const char *prefix, int unit) -{ - const struct netdev_boot_setup *s = dev_boot_setup; - char name[IFNAMSIZ]; - int i; - - sprintf(name, "%s%d", prefix, unit); - - /* - * If device already registered then return base of 1 - * to indicate not to probe for this interface - */ - if (__dev_get_by_name(name)) - return 1; - - for (i = 0; i < NETDEV_BOOT_SETUP_MAX; i++) - if (!strcmp(name, s[i].name)) - return s[i].map.base_addr; - return 0; -} - -/* - * Saves at boot time configured settings for any netdevice. - */ -int __init netdev_boot_setup(char *str) -{ - int ints[5]; - struct ifmap map; - - str = get_options(str, ARRAY_SIZE(ints), ints); - if (!str || !*str) - return 0; - - /* Save settings */ - memset(&map, 0, sizeof(map)); - if (ints[0] > 0) - map.irq = ints[1]; - if (ints[0] > 1) - map.base_addr = ints[2]; - if (ints[0] > 2) - map.mem_start = ints[3]; - if (ints[0] > 3) - map.mem_end = ints[4]; - - /* Add new entry to the list */ - return netdev_boot_setup_add(str, &map); -} - -__setup("netdev=", netdev_boot_setup); - -/******************************************************************************* - - Device Interface Subroutines - -*******************************************************************************/ - -/** - * __dev_get_by_name - find a device by its name - * @name: name to find - * - * Find an interface by name. Must be called under RTNL semaphore - * or @dev_base_lock. If the name is found a pointer to the device - * is returned. If the name is not found then %NULL is returned. The - * reference counters are not incremented so the caller must be - * careful with locks. - */ - -struct net_device *__dev_get_by_name(const char *name) -{ - struct hlist_node *p; - - hlist_for_each(p, dev_name_hash(name)) { - struct net_device *dev - = hlist_entry(p, struct net_device, name_hlist); - if (!strncmp(dev->name, name, IFNAMSIZ)) - return dev; - } - return NULL; -} - -/** - * dev_get_by_name - find a device by its name - * @name: name to find - * - * Find an interface by name. This can be called from any - * context and does its own locking. The returned handle has - * the usage count incremented and the caller must use dev_put() to - * release it when it is no longer needed. %NULL is returned if no - * matching device is found. - */ - -struct net_device *dev_get_by_name(const char *name) -{ - struct net_device *dev; - - read_lock(&dev_base_lock); - dev = __dev_get_by_name(name); - if (dev) - dev_hold(dev); - read_unlock(&dev_base_lock); - return dev; -} - -/** - * __dev_get_by_index - find a device by its ifindex - * @ifindex: index of device - * - * Search for an interface by index. Returns %NULL if the device - * is not found or a pointer to the device. The device has not - * had its reference counter increased so the caller must be careful - * about locking. The caller must hold either the RTNL semaphore - * or @dev_base_lock. - */ - -struct net_device *__dev_get_by_index(int ifindex) -{ - struct hlist_node *p; - - hlist_for_each(p, dev_index_hash(ifindex)) { - struct net_device *dev - = hlist_entry(p, struct net_device, index_hlist); - if (dev->ifindex == ifindex) - return dev; - } - return NULL; -} - - -/** - * dev_get_by_index - find a device by its ifindex - * @ifindex: index of device - * - * Search for an interface by index. Returns NULL if the device - * is not found or a pointer to the device. The device returned has - * had a reference added and the pointer is safe until the user calls - * dev_put to indicate they have finished with it. - */ - -struct net_device *dev_get_by_index(int ifindex) -{ - struct net_device *dev; - - read_lock(&dev_base_lock); - dev = __dev_get_by_index(ifindex); - if (dev) - dev_hold(dev); - read_unlock(&dev_base_lock); - return dev; -} - -/** - * dev_getbyhwaddr - find a device by its hardware address - * @type: media type of device - * @ha: hardware address - * - * Search for an interface by MAC address. Returns NULL if the device - * is not found or a pointer to the device. The caller must hold the - * rtnl semaphore. The returned device has not had its ref count increased - * and the caller must therefore be careful about locking - * - * BUGS: - * If the API was consistent this would be __dev_get_by_hwaddr - */ - -struct net_device *dev_getbyhwaddr(unsigned short type, char *ha) -{ - struct net_device *dev; - - ASSERT_RTNL(); - - for (dev = dev_base; dev; dev = dev->next) - if (dev->type == type && - !memcmp(dev->dev_addr, ha, dev->addr_len)) - break; - return dev; -} - -EXPORT_SYMBOL(dev_getbyhwaddr); - -struct net_device *dev_getfirstbyhwtype(unsigned short type) -{ - struct net_device *dev; - - rtnl_lock(); - for (dev = dev_base; dev; dev = dev->next) { - if (dev->type == type) { - dev_hold(dev); - break; - } - } - rtnl_unlock(); - return dev; -} - -EXPORT_SYMBOL(dev_getfirstbyhwtype); - -/** - * dev_get_by_flags - find any device with given flags - * @if_flags: IFF_* values - * @mask: bitmask of bits in if_flags to check - * - * Search for any interface with the given flags. Returns NULL if a device - * is not found or a pointer to the device. The device returned has - * had a reference added and the pointer is safe until the user calls - * dev_put to indicate they have finished with it. - */ - -struct net_device * dev_get_by_flags(unsigned short if_flags, unsigned short mask) -{ - struct net_device *dev; - - read_lock(&dev_base_lock); - for (dev = dev_base; dev != NULL; dev = dev->next) { - if (((dev->flags ^ if_flags) & mask) == 0) { - dev_hold(dev); - break; - } - } - read_unlock(&dev_base_lock); - return dev; -} - -/** - * dev_valid_name - check if name is okay for network device - * @name: name string - * - * Network device names need to be valid file names to - * to allow sysfs to work. We also disallow any kind of - * whitespace. - */ -int dev_valid_name(const char *name) -{ - if (*name == '\0') - return 0; - if (!strcmp(name, ".") || !strcmp(name, "..")) - return 0; - - while (*name) { - if (*name == '/' || isspace(*name)) - return 0; - name++; - } - return 1; -} - -/** - * dev_alloc_name - allocate a name for a device - * @dev: device - * @name: name format string - * - * Passed a format string - eg "lt%d" it will try and find a suitable - * id. It scans list of devices to build up a free map, then chooses - * the first empty slot. The caller must hold the dev_base or rtnl lock - * while allocating the name and adding the device in order to avoid - * duplicates. - * Limited to bits_per_byte * page size devices (ie 32K on most platforms). - * Returns the number of the unit assigned or a negative errno code. - */ - -int dev_alloc_name(struct net_device *dev, const char *name) -{ - int i = 0; - char buf[IFNAMSIZ]; - const char *p; - const int max_netdevices = 8*PAGE_SIZE; - long *inuse; - struct net_device *d; - - p = strnchr(name, IFNAMSIZ-1, '%'); - if (p) { - /* - * Verify the string as this thing may have come from - * the user. There must be either one "%d" and no other "%" - * characters. - */ - if (p[1] != 'd' || strchr(p + 2, '%')) - return -EINVAL; - - /* Use one page as a bit array of possible slots */ - inuse = (long *) get_zeroed_page(GFP_ATOMIC); - if (!inuse) - return -ENOMEM; - - for (d = dev_base; d; d = d->next) { - if (!sscanf(d->name, name, &i)) - continue; - if (i < 0 || i >= max_netdevices) - continue; - - /* avoid cases where sscanf is not exact inverse of printf */ - snprintf(buf, sizeof(buf), name, i); - if (!strncmp(buf, d->name, IFNAMSIZ)) - set_bit(i, inuse); - } - - i = find_first_zero_bit(inuse, max_netdevices); - free_page((unsigned long) inuse); - } - - snprintf(buf, sizeof(buf), name, i); - if (!__dev_get_by_name(buf)) { - strlcpy(dev->name, buf, IFNAMSIZ); - return i; - } - - /* It is possible to run out of possible slots - * when the name is long and there isn't enough space left - * for the digits, or if all bits are used. - */ - return -ENFILE; -} - - -/** - * dev_change_name - change name of a device - * @dev: device - * @newname: name (or format string) must be at least IFNAMSIZ - * - * Change name of a device, can pass format strings "eth%d". - * for wildcarding. - */ -int dev_change_name(struct net_device *dev, char *newname) -{ - int err = 0; - - ASSERT_RTNL(); - - if (dev->flags & IFF_UP) - return -EBUSY; - - if (!dev_valid_name(newname)) - return -EINVAL; - - if (strchr(newname, '%')) { - err = dev_alloc_name(dev, newname); - if (err < 0) - return err; - strcpy(newname, dev->name); - } - else if (__dev_get_by_name(newname)) - return -EEXIST; - else - strlcpy(dev->name, newname, IFNAMSIZ); - - err = class_device_rename(&dev->class_dev, dev->name); - if (!err) { - hlist_del(&dev->name_hlist); - hlist_add_head(&dev->name_hlist, dev_name_hash(dev->name)); - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGENAME, dev); - } - - return err; -} - -/** - * netdev_features_change - device changes features - * @dev: device to cause notification - * - * Called to indicate a device has changed features. - */ -void netdev_features_change(struct net_device *dev) -{ - raw_notifier_call_chain(&netdev_chain, NETDEV_FEAT_CHANGE, dev); -} -EXPORT_SYMBOL(netdev_features_change); - -/** - * netdev_state_change - device changes state - * @dev: device to cause notification - * - * Called to indicate a device has changed state. This function calls - * the notifier chains for netdev_chain and sends a NEWLINK message - * to the routing socket. - */ -void netdev_state_change(struct net_device *dev) -{ - if (dev->flags & IFF_UP) { - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGE, dev); - rtmsg_ifinfo(RTM_NEWLINK, dev, 0); - } -} - -/** - * dev_load - load a network module - * @name: name of interface - * - * If a network interface is not present and the process has suitable - * privileges this function loads the module. If module loading is not - * available in this kernel then it becomes a nop. - */ - -void dev_load(const char *name) -{ - struct net_device *dev; - - read_lock(&dev_base_lock); - dev = __dev_get_by_name(name); - read_unlock(&dev_base_lock); - - if (!dev && capable(CAP_SYS_MODULE)) - request_module("%s", name); -} - -static int default_rebuild_header(struct sk_buff *skb) -{ - printk(KERN_DEBUG "%s: default_rebuild_header called -- BUG!\n", - skb->dev ? skb->dev->name : "NULL!!!"); - kfree_skb(skb); - return 1; -} - - -/** - * dev_open - prepare an interface for use. - * @dev: device to open - * - * Takes a device from down to up state. The device's private open - * function is invoked and then the multicast lists are loaded. Finally - * the device is moved into the up state and a %NETDEV_UP message is - * sent to the netdev notifier chain. - * - * Calling this function on an active interface is a nop. On a failure - * a negative errno code is returned. - */ -int dev_open(struct net_device *dev) -{ - int ret = 0; - - /* - * Is it already up? - */ - - if (dev->flags & IFF_UP) - return 0; - - /* - * Is it even present? - */ - if (!netif_device_present(dev)) - return -ENODEV; - - /* - * Call device private open method - */ - set_bit(__LINK_STATE_START, &dev->state); - if (dev->open) { - ret = dev->open(dev); - if (ret) - clear_bit(__LINK_STATE_START, &dev->state); - } - - /* - * If it went open OK then: - */ - - if (!ret) { - /* - * Set the flags. - */ - dev->flags |= IFF_UP; - - /* - * Initialize multicasting status - */ - dev_mc_upload(dev); - - /* - * Wakeup transmit queue engine - */ - dev_activate(dev); - - /* - * ... and announce new interface. - */ - raw_notifier_call_chain(&netdev_chain, NETDEV_UP, dev); - } - return ret; -} - -/** - * dev_close - shutdown an interface. - * @dev: device to shutdown - * - * This function moves an active device into down state. A - * %NETDEV_GOING_DOWN is sent to the netdev notifier chain. The device - * is then deactivated and finally a %NETDEV_DOWN is sent to the notifier - * chain. - */ -int dev_close(struct net_device *dev) -{ - if (!(dev->flags & IFF_UP)) - return 0; - - /* - * Tell people we are going down, so that they can - * prepare to death, when device is still operating. - */ - raw_notifier_call_chain(&netdev_chain, NETDEV_GOING_DOWN, dev); - - dev_deactivate(dev); - - clear_bit(__LINK_STATE_START, &dev->state); - - /* Synchronize to scheduled poll. We cannot touch poll list, - * it can be even on different cpu. So just clear netif_running(), - * and wait when poll really will happen. Actually, the best place - * for this is inside dev->stop() after device stopped its irq - * engine, but this requires more changes in devices. */ - - smp_mb__after_clear_bit(); /* Commit netif_running(). */ - while (test_bit(__LINK_STATE_RX_SCHED, &dev->state)) { - /* No hurry. */ - msleep(1); - } - - /* - * Call the device specific close. This cannot fail. - * Only if device is UP - * - * We allow it to be called even after a DETACH hot-plug - * event. - */ - if (dev->stop) - dev->stop(dev); - - /* - * Device is now down. - */ - - dev->flags &= ~IFF_UP; - - /* - * Tell people we are down - */ - raw_notifier_call_chain(&netdev_chain, NETDEV_DOWN, dev); - - return 0; -} - - -/* - * Device change register/unregister. These are not inline or static - * as we export them to the world. - */ - -/** - * register_netdevice_notifier - register a network notifier block - * @nb: notifier - * - * Register a notifier to be called when network device events occur. - * The notifier passed is linked into the kernel structures and must - * not be reused until it has been unregistered. A negative errno code - * is returned on a failure. - * - * When registered all registration and up events are replayed - * to the new notifier to allow device to have a race free - * view of the network device list. - */ - -int register_netdevice_notifier(struct notifier_block *nb) -{ - struct net_device *dev; - int err; - - rtnl_lock(); - err = raw_notifier_chain_register(&netdev_chain, nb); - if (!err) { - for (dev = dev_base; dev; dev = dev->next) { - nb->notifier_call(nb, NETDEV_REGISTER, dev); - - if (dev->flags & IFF_UP) - nb->notifier_call(nb, NETDEV_UP, dev); - } - } - rtnl_unlock(); - return err; -} - -/** - * unregister_netdevice_notifier - unregister a network notifier block - * @nb: notifier - * - * Unregister a notifier previously registered by - * register_netdevice_notifier(). The notifier is unlinked into the - * kernel structures and may then be reused. A negative errno code - * is returned on a failure. - */ - -int unregister_netdevice_notifier(struct notifier_block *nb) -{ - int err; - - rtnl_lock(); - err = raw_notifier_chain_unregister(&netdev_chain, nb); - rtnl_unlock(); - return err; -} - -/** - * call_netdevice_notifiers - call all network notifier blocks - * @val: value passed unmodified to notifier function - * @v: pointer passed unmodified to notifier function - * - * Call all network notifier blocks. Parameters and return value - * are as for raw_notifier_call_chain(). - */ - -int call_netdevice_notifiers(unsigned long val, void *v) -{ - return raw_notifier_call_chain(&netdev_chain, val, v); -} - -/* When > 0 there are consumers of rx skb time stamps */ -static atomic_t netstamp_needed = ATOMIC_INIT(0); - -void net_enable_timestamp(void) -{ - atomic_inc(&netstamp_needed); -} - -void net_disable_timestamp(void) -{ - atomic_dec(&netstamp_needed); -} - -void __net_timestamp(struct sk_buff *skb) -{ - struct timeval tv; - - do_gettimeofday(&tv); - skb_set_timestamp(skb, &tv); -} -EXPORT_SYMBOL(__net_timestamp); - -static inline void net_timestamp(struct sk_buff *skb) -{ - if (atomic_read(&netstamp_needed)) - __net_timestamp(skb); - else { - skb->tstamp.off_sec = 0; - skb->tstamp.off_usec = 0; - } -} - -/* - * Support routine. Sends outgoing frames to any network - * taps currently in use. - */ - -static void dev_queue_xmit_nit(struct sk_buff *skb, struct net_device *dev) -{ - struct packet_type *ptype; - - net_timestamp(skb); - - rcu_read_lock(); - list_for_each_entry_rcu(ptype, &ptype_all, list) { - /* Never send packets back to the socket - * they originated from - MvS (miquels@drinkel.ow.org) - */ - if ((ptype->dev == dev || !ptype->dev) && - (ptype->af_packet_priv == NULL || - (struct sock *)ptype->af_packet_priv != skb->sk)) { - struct sk_buff *skb2= skb_clone(skb, GFP_ATOMIC); - if (!skb2) - break; - - /* skb->nh should be correctly - set by sender, so that the second statement is - just protection against buggy protocols. - */ - skb2->mac.raw = skb2->data; - - if (skb2->nh.raw < skb2->data || - skb2->nh.raw > skb2->tail) { - if (net_ratelimit()) - printk(KERN_CRIT "protocol %04x is " - "buggy, dev %s\n", - skb2->protocol, dev->name); - skb2->nh.raw = skb2->data; - } - - skb2->h.raw = skb2->nh.raw; - skb2->pkt_type = PACKET_OUTGOING; - ptype->func(skb2, skb->dev, ptype, skb->dev); - } - } - rcu_read_unlock(); -} - - -void __netif_schedule(struct net_device *dev) -{ - if (!test_and_set_bit(__LINK_STATE_SCHED, &dev->state)) { - unsigned long flags; - struct softnet_data *sd; - - local_irq_save(flags); - sd = &__get_cpu_var(softnet_data); - dev->next_sched = sd->output_queue; - sd->output_queue = dev; - raise_softirq_irqoff(NET_TX_SOFTIRQ); - local_irq_restore(flags); - } -} -EXPORT_SYMBOL(__netif_schedule); - -void __netif_rx_schedule(struct net_device *dev) -{ - unsigned long flags; - - local_irq_save(flags); - dev_hold(dev); - list_add_tail(&dev->poll_list, &__get_cpu_var(softnet_data).poll_list); - if (dev->quota < 0) - dev->quota += dev->weight; - else - dev->quota = dev->weight; - __raise_softirq_irqoff(NET_RX_SOFTIRQ); - local_irq_restore(flags); -} -EXPORT_SYMBOL(__netif_rx_schedule); - -void dev_kfree_skb_any(struct sk_buff *skb) -{ - if (in_irq() || irqs_disabled()) - dev_kfree_skb_irq(skb); - else - dev_kfree_skb(skb); -} -EXPORT_SYMBOL(dev_kfree_skb_any); - - -/* Hot-plugging. */ -void netif_device_detach(struct net_device *dev) -{ - if (test_and_clear_bit(__LINK_STATE_PRESENT, &dev->state) && - netif_running(dev)) { - netif_stop_queue(dev); - } -} -EXPORT_SYMBOL(netif_device_detach); - -void netif_device_attach(struct net_device *dev) -{ - if (!test_and_set_bit(__LINK_STATE_PRESENT, &dev->state) && - netif_running(dev)) { - netif_wake_queue(dev); - __netdev_watchdog_up(dev); - } -} -EXPORT_SYMBOL(netif_device_attach); - - -/* - * Invalidate hardware checksum when packet is to be mangled, and - * complete checksum manually on outgoing path. - */ -int skb_checksum_help(struct sk_buff *skb, int inward) -{ - unsigned int csum; - int ret = 0, offset = skb->h.raw - skb->data; - - if (inward) - goto out_set_summed; - - if (unlikely(skb_shinfo(skb)->gso_size)) { - /* Let GSO fix up the checksum. */ - goto out_set_summed; - } - - if (skb_cloned(skb)) { - ret = pskb_expand_head(skb, 0, 0, GFP_ATOMIC); - if (ret) - goto out; - } - - BUG_ON(offset > (int)skb->len); - csum = skb_checksum(skb, offset, skb->len-offset, 0); - - offset = skb->tail - skb->h.raw; - BUG_ON(offset <= 0); - BUG_ON(skb->csum + 2 > offset); - - *(u16*)(skb->h.raw + skb->csum) = csum_fold(csum); - -out_set_summed: - skb->ip_summed = CHECKSUM_NONE; -out: - return ret; -} - -/** - * skb_gso_segment - Perform segmentation on skb. - * @skb: buffer to segment - * @features: features for the output path (see dev->features) - * - * This function segments the given skb and returns a list of segments. - * - * It may return NULL if the skb requires no segmentation. This is - * only possible when GSO is used for verifying header integrity. - */ -struct sk_buff *skb_gso_segment(struct sk_buff *skb, int features) -{ - struct sk_buff *segs = ERR_PTR(-EPROTONOSUPPORT); - struct packet_type *ptype; - int type = skb->protocol; - int err; - - BUG_ON(skb_shinfo(skb)->frag_list); - - skb->mac.raw = skb->data; - skb->mac_len = skb->nh.raw - skb->data; - __skb_pull(skb, skb->mac_len); - - if (unlikely(skb->ip_summed != CHECKSUM_HW)) { - if (skb_header_cloned(skb) && - (err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC))) - return ERR_PTR(err); - } - - rcu_read_lock(); - list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type) & 15], list) { - if (ptype->type == type && !ptype->dev && ptype->gso_segment) { - if (unlikely(skb->ip_summed != CHECKSUM_HW)) { - err = ptype->gso_send_check(skb); - segs = ERR_PTR(err); - if (err || skb_gso_ok(skb, features)) - break; - __skb_push(skb, skb->data - skb->nh.raw); - } - segs = ptype->gso_segment(skb, features); - break; - } - } - rcu_read_unlock(); - - __skb_push(skb, skb->data - skb->mac.raw); - - return segs; -} - -EXPORT_SYMBOL(skb_gso_segment); - -/* Take action when hardware reception checksum errors are detected. */ -#ifdef CONFIG_BUG -void netdev_rx_csum_fault(struct net_device *dev) -{ - if (net_ratelimit()) { - printk(KERN_ERR "%s: hw csum failure.\n", - dev ? dev->name : "<unknown>"); - dump_stack(); - } -} -EXPORT_SYMBOL(netdev_rx_csum_fault); -#endif - -/* Actually, we should eliminate this check as soon as we know, that: - * 1. IOMMU is present and allows to map all the memory. - * 2. No high memory really exists on this machine. - */ - -static inline int illegal_highdma(struct net_device *dev, struct sk_buff *skb) -{ -#ifdef CONFIG_HIGHMEM - int i; - - if (dev->features & NETIF_F_HIGHDMA) - return 0; - - for (i = 0; i < skb_shinfo(skb)->nr_frags; i++) - if (PageHighMem(skb_shinfo(skb)->frags[i].page)) - return 1; - -#endif - return 0; -} - -struct dev_gso_cb { - void (*destructor)(struct sk_buff *skb); -}; - -#define DEV_GSO_CB(skb) ((struct dev_gso_cb *)(skb)->cb) - -static void dev_gso_skb_destructor(struct sk_buff *skb) -{ - struct dev_gso_cb *cb; - - do { - struct sk_buff *nskb = skb->next; - - skb->next = nskb->next; - nskb->next = NULL; - kfree_skb(nskb); - } while (skb->next); - - cb = DEV_GSO_CB(skb); - if (cb->destructor) - cb->destructor(skb); -} - -/** - * dev_gso_segment - Perform emulated hardware segmentation on skb. - * @skb: buffer to segment - * - * This function segments the given skb and stores the list of segments - * in skb->next. - */ -static int dev_gso_segment(struct sk_buff *skb) -{ - struct net_device *dev = skb->dev; - struct sk_buff *segs; - int features = dev->features & ~(illegal_highdma(dev, skb) ? - NETIF_F_SG : 0); - - segs = skb_gso_segment(skb, features); - - /* Verifying header integrity only. */ - if (!segs) - return 0; - - if (unlikely(IS_ERR(segs))) - return PTR_ERR(segs); - - skb->next = segs; - DEV_GSO_CB(skb)->destructor = skb->destructor; - skb->destructor = dev_gso_skb_destructor; - - return 0; -} - -int dev_hard_start_xmit(struct sk_buff *skb, struct net_device *dev) -{ - if (likely(!skb->next)) { - if (netdev_nit) - dev_queue_xmit_nit(skb, dev); - - if (netif_needs_gso(dev, skb)) { - if (unlikely(dev_gso_segment(skb))) - goto out_kfree_skb; - if (skb->next) - goto gso; - } - - return dev->hard_start_xmit(skb, dev); - } - -gso: - do { - struct sk_buff *nskb = skb->next; - int rc; - - skb->next = nskb->next; - nskb->next = NULL; - rc = dev->hard_start_xmit(nskb, dev); - if (unlikely(rc)) { - nskb->next = skb->next; - skb->next = nskb; - return rc; - } - if (unlikely(netif_queue_stopped(dev) && skb->next)) - return NETDEV_TX_BUSY; - } while (skb->next); - - skb->destructor = DEV_GSO_CB(skb)->destructor; - -out_kfree_skb: - kfree_skb(skb); - return 0; -} - -#define HARD_TX_LOCK(dev, cpu) { \ - if ((dev->features & NETIF_F_LLTX) == 0) { \ - netif_tx_lock(dev); \ - } \ -} - -#define HARD_TX_UNLOCK(dev) { \ - if ((dev->features & NETIF_F_LLTX) == 0) { \ - netif_tx_unlock(dev); \ - } \ -} - -#ifdef CONFIG_XEN -inline int skb_checksum_setup(struct sk_buff *skb) -{ - if (skb->proto_csum_blank) { - if (skb->protocol != htons(ETH_P_IP)) - goto out; - skb->h.raw = (unsigned char *)skb->nh.iph + 4*skb->nh.iph->ihl; - if (skb->h.raw >= skb->tail) - goto out; - switch (skb->nh.iph->protocol) { - case IPPROTO_TCP: - skb->csum = offsetof(struct tcphdr, check); - break; - case IPPROTO_UDP: - skb->csum = offsetof(struct udphdr, check); - break; - default: - if (net_ratelimit()) - printk(KERN_ERR "Attempting to checksum a non-" - "TCP/UDP packet, dropping a protocol" - " %d packet", skb->nh.iph->protocol); - goto out; - } - if ((skb->h.raw + skb->csum + 2) > skb->tail) - goto out; - skb->ip_summed = CHECKSUM_HW; - skb->proto_csum_blank = 0; - } - return 0; -out: - return -EPROTO; -} -#else -inline int skb_checksum_setup(struct sk_buff *skb) { return 0; } -#endif - - -/** - * dev_queue_xmit - transmit a buffer - * @skb: buffer to transmit - * - * Queue a buffer for transmission to a network device. The caller must - * have set the device and priority and built the buffer before calling - * this function. The function can be called from an interrupt. - * - * A negative errno code is returned on a failure. A success does not - * guarantee the frame will be transmitted as it may be dropped due - * to congestion or traffic shaping. - * - * ----------------------------------------------------------------------------------- - * I notice this method can also return errors from the queue disciplines, - * including NET_XMIT_DROP, which is a positive value. So, errors can also - * be positive. - * - * Regardless of the return value, the skb is consumed, so it is currently - * difficult to retry a send to this method. (You can bump the ref count - * before sending to hold a reference for retry if you are careful.) - * - * When calling this method, interrupts MUST be enabled. This is because - * the BH enable code must have IRQs enabled so that it will not deadlock. - * --BLG - */ - -int dev_queue_xmit(struct sk_buff *skb) -{ - struct net_device *dev = skb->dev; - struct Qdisc *q; - int rc = -ENOMEM; - - /* If a checksum-deferred packet is forwarded to a device that needs a - * checksum, correct the pointers and force checksumming. - */ - if (skb_checksum_setup(skb)) - goto out_kfree_skb; - - /* GSO will handle the following emulations directly. */ - if (netif_needs_gso(dev, skb)) - goto gso; - - if (skb_shinfo(skb)->frag_list && - !(dev->features & NETIF_F_FRAGLIST) && - __skb_linearize(skb)) - goto out_kfree_skb; - - /* Fragmented skb is linearized if device does not support SG, - * or if at least one of fragments is in highmem and device - * does not support DMA from it. - */ - if (skb_shinfo(skb)->nr_frags && - (!(dev->features & NETIF_F_SG) || illegal_highdma(dev, skb)) && - __skb_linearize(skb)) - goto out_kfree_skb; - - /* If packet is not checksummed and device does not support - * checksumming for this protocol, complete checksumming here. - */ - if (skb->ip_summed == CHECKSUM_HW && - (!(dev->features & NETIF_F_GEN_CSUM) && - (!(dev->features & NETIF_F_IP_CSUM) || - skb->protocol != htons(ETH_P_IP)))) - if (skb_checksum_help(skb, 0)) - goto out_kfree_skb; - -gso: - spin_lock_prefetch(&dev->queue_lock); - - /* Disable soft irqs for various locks below. Also - * stops preemption for RCU. - */ - rcu_read_lock_bh(); - - /* Updates of qdisc are serialized by queue_lock. - * The struct Qdisc which is pointed to by qdisc is now a - * rcu structure - it may be accessed without acquiring - * a lock (but the structure may be stale.) The freeing of the - * qdisc will be deferred until it's known that there are no - * more references to it. - * - * If the qdisc has an enqueue function, we still need to - * hold the queue_lock before calling it, since queue_lock - * also serializes access to the device queue. - */ - - q = rcu_dereference(dev->qdisc); -#ifdef CONFIG_NET_CLS_ACT - skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_EGRESS); -#endif - if (q->enqueue) { - /* Grab device queue */ - spin_lock(&dev->queue_lock); - - rc = q->enqueue(skb, q); - - qdisc_run(dev); - - spin_unlock(&dev->queue_lock); - rc = rc == NET_XMIT_BYPASS ? NET_XMIT_SUCCESS : rc; - goto out; - } - - /* The device has no queue. Common case for software devices: - loopback, all the sorts of tunnels... - - Really, it is unlikely that netif_tx_lock protection is necessary - here. (f.e. loopback and IP tunnels are clean ignoring statistics - counters.) - However, it is possible, that they rely on protection - made by us here. - - Check this and shot the lock. It is not prone from deadlocks. - Either shot noqueue qdisc, it is even simpler 8) - */ - if (dev->flags & IFF_UP) { - int cpu = smp_processor_id(); /* ok because BHs are off */ - - if (dev->xmit_lock_owner != cpu) { - - HARD_TX_LOCK(dev, cpu); - - if (!netif_queue_stopped(dev)) { - rc = 0; - if (!dev_hard_start_xmit(skb, dev)) { - HARD_TX_UNLOCK(dev); - goto out; - } - } - HARD_TX_UNLOCK(dev); - if (net_ratelimit()) - printk(KERN_CRIT "Virtual device %s asks to " - "queue packet!\n", dev->name); - } else { - /* Recursion is detected! It is possible, - * unfortunately */ - if (net_ratelimit()) - printk(KERN_CRIT "Dead loop on virtual device " - "%s, fix it urgently!\n", dev->name); - } - } - - rc = -ENETDOWN; - rcu_read_unlock_bh(); - -out_kfree_skb: - kfree_skb(skb); - return rc; -out: - rcu_read_unlock_bh(); - return rc; -} - - -/*======================================================================= - Receiver routines - =======================================================================*/ - -int netdev_max_backlog = 1000; -int netdev_budget = 300; -int weight_p = 64; /* old backlog weight */ - -DEFINE_PER_CPU(struct netif_rx_stats, netdev_rx_stat) = { 0, }; - - -/** - * netif_rx - post buffer to the network code - * @skb: buffer to post - * - * This function receives a packet from a device driver and queues it for - * the upper (protocol) levels to process. It always succeeds. The buffer - * may be dropped during processing for congestion control or by the - * protocol layers. - * - * return values: - * NET_RX_SUCCESS (no congestion) - * NET_RX_CN_LOW (low congestion) - * NET_RX_CN_MOD (moderate congestion) - * NET_RX_CN_HIGH (high congestion) - * NET_RX_DROP (packet was dropped) - * - */ - -int netif_rx(struct sk_buff *skb) -{ - struct softnet_data *queue; - unsigned long flags; - - /* if netpoll wants it, pretend we never saw it */ - if (netpoll_rx(skb)) - return NET_RX_DROP; - - if (!skb->tstamp.off_sec) - net_timestamp(skb); - - /* - * The code is rearranged so that the path is the most - * short when CPU is congested, but is still operating. - */ - local_irq_save(flags); - queue = &__get_cpu_var(softnet_data); - - __get_cpu_var(netdev_rx_stat).total++; - if (queue->input_pkt_queue.qlen <= netdev_max_backlog) { - if (queue->input_pkt_queue.qlen) { -enqueue: - dev_hold(skb->dev); - __skb_queue_tail(&queue->input_pkt_queue, skb); - local_irq_restore(flags); - return NET_RX_SUCCESS; - } - - netif_rx_schedule(&queue->backlog_dev); - goto enqueue; - } - - __get_cpu_var(netdev_rx_stat).dropped++; - local_irq_restore(flags); - - kfree_skb(skb); - return NET_RX_DROP; -} - -int netif_rx_ni(struct sk_buff *skb) -{ - int err; - - preempt_disable(); - err = netif_rx(skb); - if (local_softirq_pending()) - do_softirq(); - preempt_enable(); - - return err; -} - -EXPORT_SYMBOL(netif_rx_ni); - -static inline struct net_device *skb_bond(struct sk_buff *skb) -{ - struct net_device *dev = skb->dev; - - if (dev->master) { - if (skb_bond_should_drop(skb)) { - kfree_skb(skb); - return NULL; - } - skb->dev = dev->master; - } - - return dev; -} - -static void net_tx_action(struct softirq_action *h) -{ - struct softnet_data *sd = &__get_cpu_var(softnet_data); - - if (sd->completion_queue) { - struct sk_buff *clist; - - local_irq_disable(); - clist = sd->completion_queue; - sd->completion_queue = NULL; - local_irq_enable(); - - while (clist) { - struct sk_buff *skb = clist; - clist = clist->next; - - BUG_TRAP(!atomic_read(&skb->users)); - __kfree_skb(skb); - } - } - - if (sd->output_queue) { - struct net_device *head; - - local_irq_disable(); - head = sd->output_queue; - sd->output_queue = NULL; - local_irq_enable(); - - while (head) { - struct net_device *dev = head; - head = head->next_sched; - - smp_mb__before_clear_bit(); - clear_bit(__LINK_STATE_SCHED, &dev->state); - - if (spin_trylock(&dev->queue_lock)) { - qdisc_run(dev); - spin_unlock(&dev->queue_lock); - } else { - netif_schedule(dev); - } - } - } -} - -static __inline__ int deliver_skb(struct sk_buff *skb, - struct packet_type *pt_prev, - struct net_device *orig_dev) -{ - atomic_inc(&skb->users); - return pt_prev->func(skb, skb->dev, pt_prev, orig_dev); -} - -#if defined(CONFIG_BRIDGE) || defined (CONFIG_BRIDGE_MODULE) -int (*br_handle_frame_hook)(struct net_bridge_port *p, struct sk_buff **pskb); -struct net_bridge; -struct net_bridge_fdb_entry *(*br_fdb_get_hook)(struct net_bridge *br, - unsigned char *addr); -void (*br_fdb_put_hook)(struct net_bridge_fdb_entry *ent); - -static __inline__ int handle_bridge(struct sk_buff **pskb, - struct packet_type **pt_prev, int *ret, - struct net_device *orig_dev) -{ - struct net_bridge_port *port; - - if ((*pskb)->pkt_type == PACKET_LOOPBACK || - (port = rcu_dereference((*pskb)->dev->br_port)) == NULL) - return 0; - - if (*pt_prev) { - *ret = deliver_skb(*pskb, *pt_prev, orig_dev); - *pt_prev = NULL; - } - - return br_handle_frame_hook(port, pskb); -} -#else -#define handle_bridge(skb, pt_prev, ret, orig_dev) (0) -#endif - -#ifdef CONFIG_NET_CLS_ACT -/* TODO: Maybe we should just force sch_ingress to be compiled in - * when CONFIG_NET_CLS_ACT is? otherwise some useless instructions - * a compare and 2 stores extra right now if we dont have it on - * but have CONFIG_NET_CLS_ACT - * NOTE: This doesnt stop any functionality; if you dont have - * the ingress scheduler, you just cant add policies on ingress. - * - */ -static int ing_filter(struct sk_buff *skb) -{ - struct Qdisc *q; - struct net_device *dev = skb->dev; - int result = TC_ACT_OK; - - if (dev->qdisc_ingress) { - __u32 ttl = (__u32) G_TC_RTTL(skb->tc_verd); - if (MAX_RED_LOOP < ttl++) { - printk(KERN_WARNING "Redir loop detected Dropping packet (%s->%s)\n", - skb->input_dev->name, skb->dev->name); - return TC_ACT_SHOT; - } - - skb->tc_verd = SET_TC_RTTL(skb->tc_verd,ttl); - - skb->tc_verd = SET_TC_AT(skb->tc_verd,AT_INGRESS); - - spin_lock(&dev->ingress_lock); - if ((q = dev->qdisc_ingress) != NULL) - result = q->enqueue(skb, q); - spin_unlock(&dev->ingress_lock); - - } - - return result; -} -#endif - -int netif_receive_skb(struct sk_buff *skb) -{ - struct packet_type *ptype, *pt_prev; - struct net_device *orig_dev; - int ret = NET_RX_DROP; - unsigned short type; - - /* if we've gotten here through NAPI, check netpoll */ - if (skb->dev->poll && netpoll_rx(skb)) - return NET_RX_DROP; - - if (!skb->tstamp.off_sec) - net_timestamp(skb); - - if (!skb->input_dev) - skb->input_dev = skb->dev; - - orig_dev = skb_bond(skb); - - if (!orig_dev) - return NET_RX_DROP; - - __get_cpu_var(netdev_rx_stat).total++; - - skb->h.raw = skb->nh.raw = skb->data; - skb->mac_len = skb->nh.raw - skb->mac.raw; - - pt_prev = NULL; - - rcu_read_lock(); - -#ifdef CONFIG_NET_CLS_ACT - if (skb->tc_verd & TC_NCLS) { - skb->tc_verd = CLR_TC_NCLS(skb->tc_verd); - goto ncls; - } -#endif - -#ifdef CONFIG_XEN - switch (skb->ip_summed) { - case CHECKSUM_UNNECESSARY: - skb->proto_data_valid = 1; - break; - case CHECKSUM_HW: - /* XXX Implement me. */ - default: - skb->proto_data_valid = 0; - break; - } -#endif - - list_for_each_entry_rcu(ptype, &ptype_all, list) { - if (!ptype->dev || ptype->dev == skb->dev) { - if (pt_prev) - ret = deliver_skb(skb, pt_prev, orig_dev); - pt_prev = ptype; - } - } - -#ifdef CONFIG_NET_CLS_ACT - if (pt_prev) { - ret = deliver_skb(skb, pt_prev, orig_dev); - pt_prev = NULL; /* noone else should process this after*/ - } else { - skb->tc_verd = SET_TC_OK2MUNGE(skb->tc_verd); - } - - ret = ing_filter(skb); - - if (ret == TC_ACT_SHOT || (ret == TC_ACT_STOLEN)) { - kfree_skb(skb); - goto out; - } - - skb->tc_verd = 0; -ncls: -#endif - - handle_diverter(skb); - - if (handle_bridge(&skb, &pt_prev, &ret, orig_dev)) - goto out; - - type = skb->protocol; - list_for_each_entry_rcu(ptype, &ptype_base[ntohs(type)&15], list) { - if (ptype->type == type && - (!ptype->dev || ptype->dev == skb->dev)) { - if (pt_prev) - ret = deliver_skb(skb, pt_prev, orig_dev); - pt_prev = ptype; - } - } - - if (pt_prev) { - ret = pt_prev->func(skb, skb->dev, pt_prev, orig_dev); - } else { - kfree_skb(skb); - /* Jamal, now you will not able to escape explaining - * me how you were going to use this. :-) - */ - ret = NET_RX_DROP; - } - -out: - rcu_read_unlock(); - return ret; -} - -static int process_backlog(struct net_device *backlog_dev, int *budget) -{ - int work = 0; - int quota = min(backlog_dev->quota, *budget); - struct softnet_data *queue = &__get_cpu_var(softnet_data); - unsigned long start_time = jiffies; - - backlog_dev->weight = weight_p; - for (;;) { - struct sk_buff *skb; - struct net_device *dev; - - local_irq_disable(); - skb = __skb_dequeue(&queue->input_pkt_queue); - if (!skb) - goto job_done; - local_irq_enable(); - - dev = skb->dev; - - netif_receive_skb(skb); - - dev_put(dev); - - work++; - - if (work >= quota || jiffies - start_time > 1) - break; - - } - - backlog_dev->quota -= work; - *budget -= work; - return -1; - -job_done: - backlog_dev->quota -= work; - *budget -= work; - - list_del(&backlog_dev->poll_list); - smp_mb__before_clear_bit(); - netif_poll_enable(backlog_dev); - - local_irq_enable(); - return 0; -} - -static void net_rx_action(struct softirq_action *h) -{ - struct softnet_data *queue = &__get_cpu_var(softnet_data); - unsigned long start_time = jiffies; - int budget = netdev_budget; - void *have; - - local_irq_disable(); - - while (!list_empty(&queue->poll_list)) { - struct net_device *dev; - - if (budget <= 0 || jiffies - start_time > 1) - goto softnet_break; - - local_irq_enable(); - - dev = list_entry(queue->poll_list.next, - struct net_device, poll_list); - have = netpoll_poll_lock(dev); - - if (dev->quota <= 0 || dev->poll(dev, &budget)) { - netpoll_poll_unlock(have); - local_irq_disable(); - list_move_tail(&dev->poll_list, &queue->poll_list); - if (dev->quota < 0) - dev->quota += dev->weight; - else - dev->quota = dev->weight; - } else { - netpoll_poll_unlock(have); - dev_put(dev); - local_irq_disable(); - } - } -out: -#ifdef CONFIG_NET_DMA - /* - * There may not be any more sk_buffs coming right now, so push - * any pending DMA copies to hardware - */ - if (net_dma_client) { - struct dma_chan *chan; - rcu_read_lock(); - list_for_each_entry_rcu(chan, &net_dma_client->channels, client_node) - dma_async_memcpy_issue_pending(chan); - rcu_read_unlock(); - } -#endif - local_irq_enable(); - return; - -softnet_break: - __get_cpu_var(netdev_rx_stat).time_squeeze++; - __raise_softirq_irqoff(NET_RX_SOFTIRQ); - goto out; -} - -static gifconf_func_t * gifconf_list [NPROTO]; - -/** - * register_gifconf - register a SIOCGIF handler - * @family: Address family - * @gifconf: Function handler - * - * Register protocol dependent address dumping routines. The handler - * that is passed must not be freed or reused until it has been replaced - * by another handler. - */ -int register_gifconf(unsigned int family, gifconf_func_t * gifconf) -{ - if (family >= NPROTO) - return -EINVAL; - gifconf_list[family] = gifconf; - return 0; -} - - -/* - * Map an interface index to its name (SIOCGIFNAME) - */ - -/* - * We need this ioctl for efficient implementation of the - * if_indextoname() function required by the IPv6 API. Without - * it, we would have to search all the interfaces to find a - * match. --pb - */ - -static int dev_ifname(struct ifreq __user *arg) -{ - struct net_device *dev; - struct ifreq ifr; - - /* - * Fetch the caller's info block. - */ - - if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) - return -EFAULT; - - read_lock(&dev_base_lock); - dev = __dev_get_by_index(ifr.ifr_ifindex); - if (!dev) { - read_unlock(&dev_base_lock); - return -ENODEV; - } - - strcpy(ifr.ifr_name, dev->name); - read_unlock(&dev_base_lock); - - if (copy_to_user(arg, &ifr, sizeof(struct ifreq))) - return -EFAULT; - return 0; -} - -/* - * Perform a SIOCGIFCONF call. This structure will change - * size eventually, and there is nothing I can do about it. - * Thus we will need a 'compatibility mode'. - */ - -static int dev_ifconf(char __user *arg) -{ - struct ifconf ifc; - struct net_device *dev; - char __user *pos; - int len; - int total; - int i; - - /* - * Fetch the caller's info block. - */ - - if (copy_from_user(&ifc, arg, sizeof(struct ifconf))) - return -EFAULT; - - pos = ifc.ifc_buf; - len = ifc.ifc_len; - - /* - * Loop over the interfaces, and write an info block for each. - */ - - total = 0; - for (dev = dev_base; dev; dev = dev->next) { - for (i = 0; i < NPROTO; i++) { - if (gifconf_list[i]) { - int done; - if (!pos) - done = gifconf_list[i](dev, NULL, 0); - else - done = gifconf_list[i](dev, pos + total, - len - total); - if (done < 0) - return -EFAULT; - total += done; - } - } - } - - /* - * All done. Write the updated control block back to the caller. - */ - ifc.ifc_len = total; - - /* - * Both BSD and Solaris return 0 here, so we do too. - */ - return copy_to_user(arg, &ifc, sizeof(struct ifconf)) ? -EFAULT : 0; -} - -#ifdef CONFIG_PROC_FS -/* - * This is invoked by the /proc filesystem handler to display a device - * in detail. - */ -static __inline__ struct net_device *dev_get_idx(loff_t pos) -{ - struct net_device *dev; - loff_t i; - - for (i = 0, dev = dev_base; dev && i < pos; ++i, dev = dev->next); - - return i == pos ? dev : NULL; -} - -void *dev_seq_start(struct seq_file *seq, loff_t *pos) -{ - read_lock(&dev_base_lock); - return *pos ? dev_get_idx(*pos - 1) : SEQ_START_TOKEN; -} - -void *dev_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - ++*pos; - return v == SEQ_START_TOKEN ? dev_base : ((struct net_device *)v)->next; -} - -void dev_seq_stop(struct seq_file *seq, void *v) -{ - read_unlock(&dev_base_lock); -} - -static void dev_seq_printf_stats(struct seq_file *seq, struct net_device *dev) -{ - if (dev->get_stats) { - struct net_device_stats *stats = dev->get_stats(dev); - - seq_printf(seq, "%6s:%8lu %7lu %4lu %4lu %4lu %5lu %10lu %9lu " - "%8lu %7lu %4lu %4lu %4lu %5lu %7lu %10lu\n", - dev->name, stats->rx_bytes, stats->rx_packets, - stats->rx_errors, - stats->rx_dropped + stats->rx_missed_errors, - stats->rx_fifo_errors, - stats->rx_length_errors + stats->rx_over_errors + - stats->rx_crc_errors + stats->rx_frame_errors, - stats->rx_compressed, stats->multicast, - stats->tx_bytes, stats->tx_packets, - stats->tx_errors, stats->tx_dropped, - stats->tx_fifo_errors, stats->collisions, - stats->tx_carrier_errors + - stats->tx_aborted_errors + - stats->tx_window_errors + - stats->tx_heartbeat_errors, - stats->tx_compressed); - } else - seq_printf(seq, "%6s: No statistics available.\n", dev->name); -} - -/* - * Called from the PROCfs module. This now uses the new arbitrary sized - * /proc/net interface to create /proc/net/dev - */ -static int dev_seq_show(struct seq_file *seq, void *v) -{ - if (v == SEQ_START_TOKEN) - seq_puts(seq, "Inter-| Receive " - " | Transmit\n" - " face |bytes packets errs drop fifo frame " - "compressed multicast|bytes packets errs " - "drop fifo colls carrier compressed\n"); - else - dev_seq_printf_stats(seq, v); - return 0; -} - -static struct netif_rx_stats *softnet_get_online(loff_t *pos) -{ - struct netif_rx_stats *rc = NULL; - - while (*pos < NR_CPUS) - if (cpu_online(*pos)) { - rc = &per_cpu(netdev_rx_stat, *pos); - break; - } else - ++*pos; - return rc; -} - -static void *softnet_seq_start(struct seq_file *seq, loff_t *pos) -{ - return softnet_get_online(pos); -} - -static void *softnet_seq_next(struct seq_file *seq, void *v, loff_t *pos) -{ - ++*pos; - return softnet_get_online(pos); -} - -static void softnet_seq_stop(struct seq_file *seq, void *v) -{ -} - -static int softnet_seq_show(struct seq_file *seq, void *v) -{ - struct netif_rx_stats *s = v; - - seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x %08x\n", - s->total, s->dropped, s->time_squeeze, 0, - 0, 0, 0, 0, /* was fastroute */ - s->cpu_collision ); - return 0; -} - -static struct seq_operations dev_seq_ops = { - .start = dev_seq_start, - .next = dev_seq_next, - .stop = dev_seq_stop, - .show = dev_seq_show, -}; - -static int dev_seq_open(struct inode *inode, struct file *file) -{ - return seq_open(file, &dev_seq_ops); -} - -static struct file_operations dev_seq_fops = { - .owner = THIS_MODULE, - .open = dev_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -static struct seq_operations softnet_seq_ops = { - .start = softnet_seq_start, - .next = softnet_seq_next, - .stop = softnet_seq_stop, - .show = softnet_seq_show, -}; - -static int softnet_seq_open(struct inode *inode, struct file *file) -{ - return seq_open(file, &softnet_seq_ops); -} - -static struct file_operations softnet_seq_fops = { - .owner = THIS_MODULE, - .open = softnet_seq_open, - .read = seq_read, - .llseek = seq_lseek, - .release = seq_release, -}; - -#ifdef CONFIG_WIRELESS_EXT -extern int wireless_proc_init(void); -#else -#define wireless_proc_init() 0 -#endif - -static int __init dev_proc_init(void) -{ - int rc = -ENOMEM; - - if (!proc_net_fops_create("dev", S_IRUGO, &dev_seq_fops)) - goto out; - if (!proc_net_fops_create("softnet_stat", S_IRUGO, &softnet_seq_fops)) - goto out_dev; - if (wireless_proc_init()) - goto out_softnet; - rc = 0; -out: - return rc; -out_softnet: - proc_net_remove("softnet_stat"); -out_dev: - proc_net_remove("dev"); - goto out; -} -#else -#define dev_proc_init() 0 -#endif /* CONFIG_PROC_FS */ - - -/** - * netdev_set_master - set up master/slave pair - * @slave: slave device - * @master: new master device - * - * Changes the master device of the slave. Pass %NULL to break the - * bonding. The caller must hold the RTNL semaphore. On a failure - * a negative errno code is returned. On success the reference counts - * are adjusted, %RTM_NEWLINK is sent to the routing socket and the - * function returns zero. - */ -int netdev_set_master(struct net_device *slave, struct net_device *master) -{ - struct net_device *old = slave->master; - - ASSERT_RTNL(); - - if (master) { - if (old) - return -EBUSY; - dev_hold(master); - } - - slave->master = master; - - synchronize_net(); - - if (old) - dev_put(old); - - if (master) - slave->flags |= IFF_SLAVE; - else - slave->flags &= ~IFF_SLAVE; - - rtmsg_ifinfo(RTM_NEWLINK, slave, IFF_SLAVE); - return 0; -} - -/** - * dev_set_promiscuity - update promiscuity count on a device - * @dev: device - * @inc: modifier - * - * Add or remove promiscuity from a device. While the count in the device - * remains above zero the interface remains promiscuous. Once it hits zero - * the device reverts back to normal filtering operation. A negative inc - * value is used to drop promiscuity on the device. - */ -void dev_set_promiscuity(struct net_device *dev, int inc) -{ - unsigned short old_flags = dev->flags; - - if ((dev->promiscuity += inc) == 0) - dev->flags &= ~IFF_PROMISC; - else - dev->flags |= IFF_PROMISC; - if (dev->flags != old_flags) { - dev_mc_upload(dev); - printk(KERN_INFO "device %s %s promiscuous mode\n", - dev->name, (dev->flags & IFF_PROMISC) ? "entered" : - "left"); - audit_log(current->audit_context, GFP_ATOMIC, - AUDIT_ANOM_PROMISCUOUS, - "dev=%s prom=%d old_prom=%d auid=%u", - dev->name, (dev->flags & IFF_PROMISC), - (old_flags & IFF_PROMISC), - audit_get_loginuid(current->audit_context)); - } -} - -/** - * dev_set_allmulti - update allmulti count on a device - * @dev: device - * @inc: modifier - * - * Add or remove reception of all multicast frames to a device. While the - * count in the device remains above zero the interface remains listening - * to all interfaces. Once it hits zero the device reverts back to normal - * filtering operation. A negative @inc value is used to drop the counter - * when releasing a resource needing all multicasts. - */ - -void dev_set_allmulti(struct net_device *dev, int inc) -{ - unsigned short old_flags = dev->flags; - - dev->flags |= IFF_ALLMULTI; - if ((dev->allmulti += inc) == 0) - dev->flags &= ~IFF_ALLMULTI; - if (dev->flags ^ old_flags) - dev_mc_upload(dev); -} - -unsigned dev_get_flags(const struct net_device *dev) -{ - unsigned flags; - - flags = (dev->flags & ~(IFF_PROMISC | - IFF_ALLMULTI | - IFF_RUNNING | - IFF_LOWER_UP | - IFF_DORMANT)) | - (dev->gflags & (IFF_PROMISC | - IFF_ALLMULTI)); - - if (netif_running(dev)) { - if (netif_oper_up(dev)) - flags |= IFF_RUNNING; - if (netif_carrier_ok(dev)) - flags |= IFF_LOWER_UP; - if (netif_dormant(dev)) - flags |= IFF_DORMANT; - } - - return flags; -} - -int dev_change_flags(struct net_device *dev, unsigned flags) -{ - int ret; - int old_flags = dev->flags; - - /* - * Set the flags on our device. - */ - - dev->flags = (flags & (IFF_DEBUG | IFF_NOTRAILERS | IFF_NOARP | - IFF_DYNAMIC | IFF_MULTICAST | IFF_PORTSEL | - IFF_AUTOMEDIA)) | - (dev->flags & (IFF_UP | IFF_VOLATILE | IFF_PROMISC | - IFF_ALLMULTI)); - - /* - * Load in the correct multicast list now the flags have changed. - */ - - dev_mc_upload(dev); - - /* - * Have we downed the interface. We handle IFF_UP ourselves - * according to user attempts to set it, rather than blindly - * setting it. - */ - - ret = 0; - if ((old_flags ^ flags) & IFF_UP) { /* Bit is different ? */ - ret = ((old_flags & IFF_UP) ? dev_close : dev_open)(dev); - - if (!ret) - dev_mc_upload(dev); - } - - if (dev->flags & IFF_UP && - ((old_flags ^ dev->flags) &~ (IFF_UP | IFF_PROMISC | IFF_ALLMULTI | - IFF_VOLATILE))) - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGE, dev); - - if ((flags ^ dev->gflags) & IFF_PROMISC) { - int inc = (flags & IFF_PROMISC) ? +1 : -1; - dev->gflags ^= IFF_PROMISC; - dev_set_promiscuity(dev, inc); - } - - /* NOTE: order of synchronization of IFF_PROMISC and IFF_ALLMULTI - is important. Some (broken) drivers set IFF_PROMISC, when - IFF_ALLMULTI is requested not asking us and not reporting. - */ - if ((flags ^ dev->gflags) & IFF_ALLMULTI) { - int inc = (flags & IFF_ALLMULTI) ? +1 : -1; - dev->gflags ^= IFF_ALLMULTI; - dev_set_allmulti(dev, inc); - } - - if (old_flags ^ dev->flags) - rtmsg_ifinfo(RTM_NEWLINK, dev, old_flags ^ dev->flags); - - return ret; -} - -int dev_set_mtu(struct net_device *dev, int new_mtu) -{ - int err; - - if (new_mtu == dev->mtu) - return 0; - - /* MTU must be positive. */ - if (new_mtu < 0) - return -EINVAL; - - if (!netif_device_present(dev)) - return -ENODEV; - - err = 0; - if (dev->change_mtu) - err = dev->change_mtu(dev, new_mtu); - else - dev->mtu = new_mtu; - if (!err && dev->flags & IFF_UP) - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGEMTU, dev); - return err; -} - -int dev_set_mac_address(struct net_device *dev, struct sockaddr *sa) -{ - int err; - - if (!dev->set_mac_address) - return -EOPNOTSUPP; - if (sa->sa_family != dev->type) - return -EINVAL; - if (!netif_device_present(dev)) - return -ENODEV; - err = dev->set_mac_address(dev, sa); - if (!err) - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGEADDR, dev); - return err; -} - -/* - * Perform the SIOCxIFxxx calls. - */ -static int dev_ifsioc(struct ifreq *ifr, unsigned int cmd) -{ - int err; - struct net_device *dev = __dev_get_by_name(ifr->ifr_name); - - if (!dev) - return -ENODEV; - - switch (cmd) { - case SIOCGIFFLAGS: /* Get interface flags */ - ifr->ifr_flags = dev_get_flags(dev); - return 0; - - case SIOCSIFFLAGS: /* Set interface flags */ - return dev_change_flags(dev, ifr->ifr_flags); - - case SIOCGIFMETRIC: /* Get the metric on the interface - (currently unused) */ - ifr->ifr_metric = 0; - return 0; - - case SIOCSIFMETRIC: /* Set the metric on the interface - (currently unused) */ - return -EOPNOTSUPP; - - case SIOCGIFMTU: /* Get the MTU of a device */ - ifr->ifr_mtu = dev->mtu; - return 0; - - case SIOCSIFMTU: /* Set the MTU of a device */ - return dev_set_mtu(dev, ifr->ifr_mtu); - - case SIOCGIFHWADDR: - if (!dev->addr_len) - memset(ifr->ifr_hwaddr.sa_data, 0, sizeof ifr->ifr_hwaddr.sa_data); - else - memcpy(ifr->ifr_hwaddr.sa_data, dev->dev_addr, - min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len)); - ifr->ifr_hwaddr.sa_family = dev->type; - return 0; - - case SIOCSIFHWADDR: - return dev_set_mac_address(dev, &ifr->ifr_hwaddr); - - case SIOCSIFHWBROADCAST: - if (ifr->ifr_hwaddr.sa_family != dev->type) - return -EINVAL; - memcpy(dev->broadcast, ifr->ifr_hwaddr.sa_data, - min(sizeof ifr->ifr_hwaddr.sa_data, (size_t) dev->addr_len)); - raw_notifier_call_chain(&netdev_chain, - NETDEV_CHANGEADDR, dev); - return 0; - - case SIOCGIFMAP: - ifr->ifr_map.mem_start = dev->mem_start; - ifr->ifr_map.mem_end = dev->mem_end; - ifr->ifr_map.base_addr = dev->base_addr; - ifr->ifr_map.irq = dev->irq; - ifr->ifr_map.dma = dev->dma; - ifr->ifr_map.port = dev->if_port; - return 0; - - case SIOCSIFMAP: - if (dev->set_config) { - if (!netif_device_present(dev)) - return -ENODEV; - return dev->set_config(dev, &ifr->ifr_map); - } - return -EOPNOTSUPP; - - case SIOCADDMULTI: - if (!dev->set_multicast_list || - ifr->ifr_hwaddr.sa_family != AF_UNSPEC) - return -EINVAL; - if (!netif_device_present(dev)) - return -ENODEV; - return dev_mc_add(dev, ifr->ifr_hwaddr.sa_data, - dev->addr_len, 1); - - case SIOCDELMULTI: - if (!dev->set_multicast_list || - ifr->ifr_hwaddr.sa_family != AF_UNSPEC) - return -EINVAL; - if (!netif_device_present(dev)) - return -ENODEV; - return dev_mc_delete(dev, ifr->ifr_hwaddr.sa_data, - dev->addr_len, 1); - - case SIOCGIFINDEX: - ifr->ifr_ifindex = dev->ifindex; - return 0; - - case SIOCGIFTXQLEN: - ifr->ifr_qlen = dev->tx_queue_len; - return 0; - - case SIOCSIFTXQLEN: - if (ifr->ifr_qlen < 0) - return -EINVAL; - dev->tx_queue_len = ifr->ifr_qlen; - return 0; - - case SIOCSIFNAME: - ifr->ifr_newname[IFNAMSIZ-1] = '\0'; - return dev_change_name(dev, ifr->ifr_newname); - - /* - * Unknown or private ioctl - */ - - default: - if ((cmd >= SIOCDEVPRIVATE && - cmd <= SIOCDEVPRIVATE + 15) || - cmd == SIOCBONDENSLAVE || - cmd == SIOCBONDRELEASE || - cmd == SIOCBONDSETHWADDR || - cmd == SIOCBONDSLAVEINFOQUERY || - cmd == SIOCBONDINFOQUERY || - cmd == SIOCBONDCHANGEACTIVE || - cmd == SIOCGMIIPHY || - cmd == SIOCGMIIREG || - cmd == SIOCSMIIREG || - cmd == SIOCBRADDIF || - cmd == SIOCBRDELIF || - cmd == SIOCWANDEV) { - err = -EOPNOTSUPP; - if (dev->do_ioctl) { - if (netif_device_present(dev)) - err = dev->do_ioctl(dev, ifr, - cmd); - else - err = -ENODEV; - } - } else - err = -EINVAL; - - } - return err; -} - -/* - * This function handles all "interface"-type I/O control requests. The actual - * 'doing' part of this is dev_ifsioc above. - */ - -/** - * dev_ioctl - network device ioctl - * @cmd: command to issue - * @arg: pointer to a struct ifreq in user space - * - * Issue ioctl functions to devices. This is normally called by the - * user space syscall interfaces but can sometimes be useful for - * other purposes. The return value is the return from the syscall if - * positive or a negative errno code on error. - */ - -int dev_ioctl(unsigned int cmd, void __user *arg) -{ - struct ifreq ifr; - int ret; - char *colon; - - /* One special case: SIOCGIFCONF takes ifconf argument - and requires shared lock, because it sleeps writing - to user space. - */ - - if (cmd == SIOCGIFCONF) { - rtnl_lock(); - ret = dev_ifconf((char __user *) arg); - rtnl_unlock(); - return ret; - } - if (cmd == SIOCGIFNAME) - return dev_ifname((struct ifreq __user *)arg); - - if (copy_from_user(&ifr, arg, sizeof(struct ifreq))) - return -EFAULT; - - ifr.ifr_name[IFNAMSIZ-1] = 0; - - colon = strchr(ifr.ifr_name, ':'); - if (colon) - *colon = 0; - - /* - * See which interface the caller is talking about. - */ - - switch (cmd) { - /* - * These ioctl calls: - * - can be done by all. - * - atomic and do not require locking. - * - return a value - */ - case SIOCGIFFLAGS: - case SIOCGIFMETRIC: - case SIOCGIFMTU: - case SIOCGIFHWADDR: - case SIOCGIFSLAVE: - case SIOCGIFMAP: - case SIOCGIFINDEX: - case SIOCGIFTXQLEN: - dev_load(ifr.ifr_name); - read_lock(&dev_base_lock); - ret = dev_ifsioc(&ifr, cmd); - read_unlock(&dev_base_lock); - if (!ret) { - if (colon) - *colon = ':'; - if (copy_to_user(arg, &ifr, - sizeof(struct ifreq))) - ret = -EFAULT; - } - return ret; - - case SIOCETHTOOL: - dev_load(ifr.ifr_name); - rtnl_lock(); - ret = dev_ethtool(&ifr); - rtnl_unlock(); - if (!ret) { - if (colon) - *colon = ':'; - if (copy_to_user(arg, &ifr, - sizeof(struct ifreq))) - ret = -EFAULT; - } - return ret; - - /* - * These ioctl calls: - * - require superuser power. - * - require strict serialization. - * - return a value - */ - case SIOCGMIIPHY: - case SIOCGMIIREG: - case SIOCSIFNAME: - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - dev_load(ifr.ifr_name); - rtnl_lock(); - ret = dev_ifsioc(&ifr, cmd); - rtnl_unlock(); - if (!ret) { - if (colon) - *colon = ':'; - if (copy_to_user(arg, &ifr, - sizeof(struct ifreq))) - ret = -EFAULT; - } - return ret; - - /* - * These ioctl calls: - * - require superuser power. - * - require strict serialization. - * - do not return a value - */ - case SIOCSIFFLAGS: - case SIOCSIFMETRIC: - case SIOCSIFMTU: - case SIOCSIFMAP: - case SIOCSIFHWADDR: - case SIOCSIFSLAVE: - case SIOCADDMULTI: - case SIOCDELMULTI: - case SIOCSIFHWBROADCAST: - case SIOCSIFTXQLEN: - case SIOCSMIIREG: - case SIOCBONDENSLAVE: - case SIOCBONDRELEASE: - case SIOCBONDSETHWADDR: - case SIOCBONDCHANGEACTIVE: - case SIOCBRADDIF: - case SIOCBRDELIF: - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - /* fall through */ - case SIOCBONDSLAVEINFOQUERY: - case SIOCBONDINFOQUERY: - dev_load(ifr.ifr_name); - rtnl_lock(); - ret = dev_ifsioc(&ifr, cmd); - rtnl_unlock(); - return ret; - - case SIOCGIFMEM: - /* Get the per device memory space. We can add this but - * currently do not support it */ - case SIOCSIFMEM: - /* Set the per device memory buffer space. - * Not applicable in our case */ - case SIOCSIFLINK: - return -EINVAL; - - /* - * Unknown or private ioctl. - */ - default: - if (cmd == SIOCWANDEV || - (cmd >= SIOCDEVPRIVATE && - cmd <= SIOCDEVPRIVATE + 15)) { - dev_load(ifr.ifr_name); - rtnl_lock(); - ret = dev_ifsioc(&ifr, cmd); - rtnl_unlock(); - if (!ret && copy_to_user(arg, &ifr, - sizeof(struct ifreq))) - ret = -EFAULT; - return ret; - } -#ifdef CONFIG_WIRELESS_EXT - /* Take care of Wireless Extensions */ - if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { - /* If command is `set a parameter', or - * `get the encoding parameters', check if - * the user has the right to do it */ - if (IW_IS_SET(cmd) || cmd == SIOCGIWENCODE - || cmd == SIOCGIWENCODEEXT) { - if (!capable(CAP_NET_ADMIN)) - return -EPERM; - } - dev_load(ifr.ifr_name); - rtnl_lock(); - /* Follow me in net/core/wireless.c */ - ret = wireless_process_ioctl(&ifr, cmd); - rtnl_unlock(); - if (IW_IS_GET(cmd) && - copy_to_user(arg, &ifr, - sizeof(struct ifreq))) - ret = -EFAULT; - return ret; - } -#endif /* CONFIG_WIRELESS_EXT */ - return -EINVAL; - } -} - - -/** - * dev_new_index - allocate an ifindex - * - * Returns a suitable unique value for a new device interface - * number. The caller must hold the rtnl semaphore or the - * dev_base_lock to be sure it remains unique. - */ -static int dev_new_index(void) -{ - static int ifindex; - for (;;) { - if (++ifindex <= 0) - ifindex = 1; - if (!__dev_get_by_index(ifindex)) - return ifindex; - } -} - -static int dev_boot_phase = 1; - -/* Delayed registration/unregisteration */ -static DEFINE_SPINLOCK(net_todo_list_lock); -static struct list_head net_todo_list = LIST_HEAD_INIT(net_todo_list); - -static inline void net_set_todo(struct net_device *dev) -{ - spin_lock(&net_todo_list_lock); - list_add_tail(&dev->todo_list, &net_todo_list); - spin_unlock(&net_todo_list_lock); -} - -/** - * register_netdevice - register a network device - * @dev: device to register - * - * Take a completed network device structure and add it to the kernel - * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier - * chain. 0 is returned on success. A negative errno code is returned - * on a failure to set up the device, or if the name is a duplicate. - * - * Callers must hold the rtnl semaphore. You may want - * register_netdev() instead of this. - * - * BUGS: - * The locking appears insufficient to guarantee two parallel registers - * will not get the same name. - */ - -int register_netdevice(struct net_device *dev) -{ - struct hlist_head *head; - struct hlist_node *p; - int ret; - - BUG_ON(dev_boot_phase); - ASSERT_RTNL(); - - might_sleep(); - - /* When net_device's are persistent, this will be fatal. */ - BUG_ON(dev->reg_state != NETREG_UNINITIALIZED); - - spin_lock_init(&dev->queue_lock); - spin_lock_init(&dev->_xmit_lock); - dev->xmit_lock_owner = -1; -#ifdef CONFIG_NET_CLS_ACT - spin_lock_init(&dev->ingress_lock); -#endif - - ret = alloc_divert_blk(dev); - if (ret) - goto out; - - dev->iflink = -1; - - /* Init, if this function is available */ - if (dev->init) { - ret = dev->init(dev); - if (ret) { - if (ret > 0) - ret = -EIO; - goto out_err; - } - } - - if (!dev_valid_name(dev->name)) { - ret = -EINVAL; - goto out_err; - } - - dev->ifindex = dev_new_index(); - if (dev->iflink == -1) - dev->iflink = dev->ifindex; - - /* Check for existence of name */ - head = dev_name_hash(dev->name); - hlist_for_each(p, head) { - struct net_device *d - = hlist_entry(p, struct net_device, name_hlist); - if (!strncmp(d->name, dev->name, IFNAMSIZ)) { - ret = -EEXIST; - goto out_err; - } - } - - /* Fix illegal SG+CSUM combinations. */ - if ((dev->features & NETIF_F_SG) && - !(dev->features & NETIF_F_ALL_CSUM)) { - printk(KERN_NOTICE "%s: Dropping NETIF_F_SG since no checksum feature.\n", - dev->name); - dev->features &= ~NETIF_F_SG; - } - - /* TSO requires that SG is present as well. */ - if ((dev->features & NETIF_F_TSO) && - !(dev->features & NETIF_F_SG)) { - printk(KERN_NOTICE "%s: Dropping NETIF_F_TSO since no SG feature.\n", - dev->name); - dev->features &= ~NETIF_F_TSO; - } - if (dev->features & NETIF_F_UFO) { - if (!(dev->features & NETIF_F_HW_CSUM)) { - printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no " - "NETIF_F_HW_CSUM feature.\n", - dev->name); - dev->features &= ~NETIF_F_UFO; - } - if (!(dev->features & NETIF_F_SG)) { - printk(KERN_ERR "%s: Dropping NETIF_F_UFO since no " - "NETIF_F_SG feature.\n", - dev->name); - dev->features &= ~NETIF_F_UFO; - } - } - - /* - * nil rebuild_header routine, - * that should be never called and used as just bug trap. - */ - - if (!dev->rebuild_header) - dev->rebuild_header = default_rebuild_header; - - ret = netdev_register_sysfs(dev); - if (ret) - goto out_err; - dev->reg_state = NETREG_REGISTERED; - - /* - * Default initial state at registry is that the - * device is present. - */ - - set_bit(__LINK_STATE_PRESENT, &dev->state); - - dev->next = NULL; - dev_init_scheduler(dev); - write_lock_bh(&dev_base_lock); - *dev_tail = dev; - dev_tail = &dev->next; - hlist_add_head(&dev->name_hlist, head); - hlist_add_head(&dev->index_hlist, dev_index_hash(dev->ifindex)); - dev_hold(dev); - write_unlock_bh(&dev_base_lock); - - /* Notify protocols, that a new device appeared. */ - raw_notifier_call_chain(&netdev_chain, NETDEV_REGISTER, dev); - - ret = 0; - -out: - return ret; -out_err: - free_divert_blk(dev); - goto out; -} - -/** - * register_netdev - register a network device - * @dev: device to register - * - * Take a completed network device structure and add it to the kernel - * interfaces. A %NETDEV_REGISTER message is sent to the netdev notifier - * chain. 0 is returned on success. A negative errno code is returned - * on a failure to set up the device, or if the name is a duplicate. - * - * This is a wrapper around register_netdev that takes the rtnl semaphore - * and expands the device name if you passed a format string to - * alloc_netdev. - */ -int register_netdev(struct net_device *dev) -{ - int err; - - rtnl_lock(); - - /* - * If the name is a format string the caller wants us to do a - * name allocation. - */ - if (strchr(dev->name, '%')) { - err = dev_alloc_name(dev, dev->name); - if (err < 0) - goto out; - } - - /* - * Back compatibility hook. Kill this one in 2.5 - */ - if (dev->name[0] == 0 || dev->name[0] == ' ') { - err = dev_alloc_name(dev, "eth%d"); - if (err < 0) - goto out; - } - - err = register_netdevice(dev); -out: - rtnl_unlock(); - return err; -} -EXPORT_SYMBOL(register_netdev); - -/* - * netdev_wait_allrefs - wait until all references are gone. - * - * This is called when unregistering network devices. - * - * Any protocol or device that holds a reference should register - * for netdevice notification, and cleanup and put back the - * reference if they receive an UNREGISTER event. - * We can get stuck here if buggy protocols don't correctly - * call dev_put. - */ -static void netdev_wait_allrefs(struct net_device *dev) -{ - unsigned long rebroadcast_time, warning_time; - - rebroadcast_time = warning_time = jiffies; - while (atomic_read(&dev->refcnt) != 0) { - if (time_after(jiffies, rebroadcast_time + 1 * HZ)) { - rtnl_lock(); - - /* Rebroadcast unregister notification */ - raw_notifier_call_chain(&netdev_chain, - NETDEV_UNREGISTER, dev); - - if (test_bit(__LINK_STATE_LINKWATCH_PENDING, - &dev->state)) { - /* We must not have linkwatch events - * pending on unregister. If this - * happens, we simply run the queue - * unscheduled, resulting in a noop - * for this device. - */ - linkwatch_run_queue(); - } - - __rtnl_unlock(); - - rebroadcast_time = jiffies; - } - - msleep(250); - - if (time_after(jiffies, warning_time + 10 * HZ)) { - printk(KERN_EMERG "unregister_netdevice: " - "waiting for %s to become free. Usage " - "count = %d\n", - dev->name, atomic_read(&dev->refcnt)); - warning_time = jiffies; - } - } -} - -/* The sequence is: - * - * rtnl_lock(); - * ... - * register_netdevice(x1); - * register_netdevice(x2); - * ... - * unregister_netdevice(y1); - * unregister_netdevice(y2); - * ... - * rtnl_unlock(); - * free_netdev(y1); - * free_netdev(y2); - * - * We are invoked by rtnl_unlock() after it drops the semaphore. - * This allows us to deal with problems: - * 1) We can delete sysfs objects which invoke hotplug - * without deadlocking with linkwatch via keventd. - * 2) Since we run with the RTNL semaphore not held, we can sleep - * safely in order to wait for the netdev refcnt to drop to zero. - */ -static DEFINE_MUTEX(net_todo_run_mutex); -void netdev_run_todo(void) -{ - struct list_head list; - - /* Need to guard against multiple cpu's getting out of order. */ - mutex_lock(&net_todo_run_mutex); - - /* Not safe to do outside the semaphore. We must not return - * until all unregister events invoked by the local processor - * have been completed (either by this todo run, or one on - * another cpu). - */ - if (list_empty(&net_todo_list)) - goto out; - - /* Snapshot list, allow later requests */ - spin_lock(&net_todo_list_lock); - list_replace_init(&net_todo_list, &list); - spin_unlock(&net_todo_list_lock); - - while (!list_empty(&list)) { - struct net_device *dev - = list_entry(list.next, struct net_device, todo_list); - list_del(&dev->todo_list); - - if (unlikely(dev->reg_state != NETREG_UNREGISTERING)) { - printk(KERN_ERR "network todo '%s' but state %d\n", - dev->name, dev->reg_state); - dump_stack(); - continue; - } - - netdev_unregister_sysfs(dev); - dev->reg_state = NETREG_UNREGISTERED; - - netdev_wait_allrefs(dev); - - /* paranoia */ - BUG_ON(atomic_read(&dev->refcnt)); - BUG_TRAP(!dev->ip_ptr); - BUG_TRAP(!dev->ip6_ptr); - BUG_TRAP(!dev->dn_ptr); - - /* It must be the very last action, - * after this 'dev' may point to freed up memory. - */ - if (dev->destructor) - dev->destructor(dev); - } - -out: - mutex_unlock(&net_todo_run_mutex); -} - -/** - * alloc_netdev - allocate network device - * @sizeof_priv: size of private data to allocate space for - * @name: device name format string - * @setup: callback to initialize device - * - * Allocates a struct net_device with private data area for driver use - * and performs basic initialization. - */ -struct net_device *alloc_netdev(int sizeof_priv, const char *name, - void (*setup)(struct net_device *)) -{ - void *p; - struct net_device *dev; - int alloc_size; - - /* ensure 32-byte alignment of both the device and private area */ - alloc_size = (sizeof(*dev) + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST; - alloc_size += sizeof_priv + NETDEV_ALIGN_CONST; - - p = kzalloc(alloc_size, GFP_KERNEL); - if (!p) { - printk(KERN_ERR "alloc_dev: Unable to allocate device.\n"); - return NULL; - } - - dev = (struct net_device *) - (((long)p + NETDEV_ALIGN_CONST) & ~NETDEV_ALIGN_CONST); - dev->padded = (char *)dev - (char *)p; - - if (sizeof_priv) - dev->priv = netdev_priv(dev); - - setup(dev); - strcpy(dev->name, name); - return dev; -} -EXPORT_SYMBOL(alloc_netdev); - -/** - * free_netdev - free network device - * @dev: device - * - * This function does the last stage of destroying an allocated device - * interface. The reference to the device object is released. - * If this is the last reference then it will be freed. - */ -void free_netdev(struct net_device *dev) -{ -#ifdef CONFIG_SYSFS - /* Compatibility with error handling in drivers */ - if (dev->reg_state == NETREG_UNINITIALIZED) { - kfree((char *)dev - dev->padded); - return; - } - - BUG_ON(dev->reg_state != NETREG_UNREGISTERED); - dev->reg_state = NETREG_RELEASED; - - /* will free via class release */ - class_device_put(&dev->class_dev); -#else - kfree((char *)dev - dev->padded); -#endif -} - -/* Synchronize with packet receive processing. */ -void synchronize_net(void) -{ - might_sleep(); - synchronize_rcu(); -} - -/** - * unregister_netdevice - remove device from the kernel - * @dev: device - * - * This function shuts down a device interface and removes it - * from the kernel tables. On success 0 is returned, on a failure - * a negative errno code is returned. - * - * Callers must hold the rtnl semaphore. You may want - * unregister_netdev() instead of this. - */ - -int unregister_netdevice(struct net_device *dev) -{ - struct net_device *d, **dp; - - BUG_ON(dev_boot_phase); - ASSERT_RTNL(); - - /* Some devices call without registering for initialization unwind. */ - if (dev->reg_state == NETREG_UNINITIALIZED) { - printk(KERN_DEBUG "unregister_netdevice: device %s/%p never " - "was registered\n", dev->name, dev); - return -ENODEV; - } - - BUG_ON(dev->reg_state != NETREG_REGISTERED); - - /* If device is running, close it first. */ - if (dev->flags & IFF_UP) - dev_close(dev); - - /* And unlink it from device chain. */ - for (dp = &dev_base; (d = *dp) != NULL; dp = &d->next) { - if (d == dev) { - write_lock_bh(&dev_base_lock); - hlist_del(&dev->name_hlist); - hlist_del(&dev->index_hlist); - if (dev_tail == &dev->next) - dev_tail = dp; - *dp = d->next; - write_unlock_bh(&dev_base_lock); - break; - } - } - if (!d) { - printk(KERN_ERR "unregister net_device: '%s' not found\n", - dev->name); - return -ENODEV; - } - - dev->reg_state = NETREG_UNREGISTERING; - - synchronize_net(); - - /* Shutdown queueing discipline. */ - dev_shutdown(dev); - - - /* Notify protocols, that we are about to destroy - this device. They should clean all the things. - */ - raw_notifier_call_chain(&netdev_chain, NETDEV_UNREGISTER, dev); - - /* - * Flush the multicast chain - */ - dev_mc_discard(dev); - - if (dev->uninit) - dev->uninit(dev); - - /* Notifier chain MUST detach us from master device. */ - BUG_TRAP(!dev->master); - - free_divert_blk(dev); - - /* Finish processing unregister after unlock */ - net_set_todo(dev); - - synchronize_net(); - - dev_put(dev); - return 0; -} - -/** - * unregister_netdev - remove device from the kernel - * @dev: device - * - * This function shuts down a device interface and removes it - * from the kernel tables. On success 0 is returned, on a failure - * a negative errno code is returned. - * - * This is just a wrapper for unregister_netdevice that takes - * the rtnl semaphore. In general you want to use this and not - * unregister_netdevice. - */ -void unregister_netdev(struct net_device *dev) -{ - rtnl_lock(); - unregister_netdevice(dev); - rtnl_unlock(); -} - -EXPORT_SYMBOL(unregister_netdev); - -#ifdef CONFIG_HOTPLUG_CPU -static int dev_cpu_callback(struct notifier_block *nfb, - unsigned long action, - void *ocpu) -{ - struct sk_buff **list_skb; - struct net_device **list_net; - struct sk_buff *skb; - unsigned int cpu, oldcpu = (unsigned long)ocpu; - struct softnet_data *sd, *oldsd; - - if (action != CPU_DEAD) - return NOTIFY_OK; - - local_irq_disable(); - cpu = smp_processor_id(); - sd = &per_cpu(softnet_data, cpu); - oldsd = &per_cpu(softnet_data, oldcpu); - - /* Find end of our completion_queue. */ - list_skb = &sd->completion_queue; - while (*list_skb) - list_skb = &(*list_skb)->next; - /* Append completion queue from offline CPU. */ - *list_skb = oldsd->completion_queue; - oldsd->completion_queue = NULL; - - /* Find end of our output_queue. */ - list_net = &sd->output_queue; - while (*list_net) - list_net = &(*list_net)->next_sched; - /* Append output queue from offline CPU. */ - *list_net = oldsd->output_queue; - oldsd->output_queue = NULL; - - raise_softirq_irqoff(NET_TX_SOFTIRQ); - local_irq_enable(); - - /* Process offline CPU's input_pkt_queue */ - while ((skb = __skb_dequeue(&oldsd->input_pkt_queue))) - netif_rx(skb); - - return NOTIFY_OK; -} -#endif /* CONFIG_HOTPLUG_CPU */ - -#ifdef CONFIG_NET_DMA -/** - * net_dma_rebalance - - * This is called when the number of channels allocated to the net_dma_client - * changes. The net_dma_client tries to have one DMA channel per CPU. - */ -static void net_dma_rebalance(void) -{ - unsigned int cpu, i, n; - struct dma_chan *chan; - - if (net_dma_count == 0) { - for_each_online_cpu(cpu) - rcu_assign_pointer(per_cpu(softnet_data, cpu).net_dma, NULL); - return; - } - - i = 0; - cpu = first_cpu(cpu_online_map); - - rcu_read_lock(); - list_for_each_entry(chan, &net_dma_client->channels, client_node) { - n = ((num_online_cpus() / net_dma_count) - + (i < (num_online_cpus() % net_dma_count) ? 1 : 0)); - - while(n) { - per_cpu(softnet_data, cpu).net_dma = chan; - cpu = next_cpu(cpu, cpu_online_map); - n--; - } - i++; - } - rcu_read_unlock(); -} - -/** - * netdev_dma_event - event callback for the net_dma_client - * @client: should always be net_dma_client - * @chan: DMA channel for the event - * @event: event type - */ -static void netdev_dma_event(struct dma_client *client, struct dma_chan *chan, - enum dma_event event) -{ - spin_lock(&net_dma_event_lock); - switch (event) { - case DMA_RESOURCE_ADDED: - net_dma_count++; - net_dma_rebalance(); - break; - case DMA_RESOURCE_REMOVED: - net_dma_count--; - net_dma_rebalance(); - break; - default: - break; - } - spin_unlock(&net_dma_event_lock); -} - -/** - * netdev_dma_regiser - register the networking subsystem as a DMA client - */ -static int __init netdev_dma_register(void) -{ - spin_lock_init(&net_dma_event_lock); - net_dma_client = dma_async_client_register(netdev_dma_event); - if (net_dma_client == NULL) - return -ENOMEM; - - dma_async_client_chan_request(net_dma_client, num_online_cpus()); - return 0; -} - -#else -static int __init netdev_dma_register(void) { return -ENODEV; } -#endif /* CONFIG_NET_DMA */ - -/* - * Initialize the DEV module. At boot time this walks the device list and - * unhooks any devices that fail to initialise (normally hardware not - * present) and leaves us with a valid list of present and active devices. - * - */ - -/* - * This is called single threaded during boot, so no need - * to take the rtnl semaphore. - */ -static int __init net_dev_init(void) -{ - int i, rc = -ENOMEM; - - BUG_ON(!dev_boot_phase); - - net_random_init(); - - if (dev_proc_init()) - goto out; - - if (netdev_sysfs_init()) - goto out; - - INIT_LIST_HEAD(&ptype_all); - for (i = 0; i < 16; i++) - INIT_LIST_HEAD(&ptype_base[i]); - - for (i = 0; i < ARRAY_SIZE(dev_name_head); i++) - INIT_HLIST_HEAD(&dev_name_head[i]); - - for (i = 0; i < ARRAY_SIZE(dev_index_head); i++) - INIT_HLIST_HEAD(&dev_index_head[i]); - - /* - * Initialise the packet receive queues. - */ - - for_each_possible_cpu(i) { - struct softnet_data *queue; - - queue = &per_cpu(softnet_data, i); - skb_queue_head_init(&queue->input_pkt_queue); - queue->completion_queue = NULL; - INIT_LIST_HEAD(&queue->poll_list); - set_bit(__LINK_STATE_START, &queue->backlog_dev.state); - queue->backlog_dev.weight = weight_p; - queue->backlog_dev.poll = process_backlog; - atomic_set(&queue->backlog_dev.refcnt, 1); - } - - netdev_dma_register(); - - dev_boot_phase = 0; - - open_softirq(NET_TX_SOFTIRQ, net_tx_action, NULL); - open_softirq(NET_RX_SOFTIRQ, net_rx_action, NULL); - - hotcpu_notifier(dev_cpu_callback, 0); - dst_init(); - dev_mcast_init(); - rc = 0; -out: - return rc; -} - -subsys_initcall(net_dev_init); - -EXPORT_SYMBOL(__dev_get_by_index); -EXPORT_SYMBOL(__dev_get_by_name); -EXPORT_SYMBOL(__dev_remove_pack); -EXPORT_SYMBOL(dev_valid_name); -EXPORT_SYMBOL(dev_add_pack); -EXPORT_SYMBOL(dev_alloc_name); -EXPORT_SYMBOL(dev_close); -EXPORT_SYMBOL(dev_get_by_flags); -EXPORT_SYMBOL(dev_get_by_index); -EXPORT_SYMBOL(dev_get_by_name); -EXPORT_SYMBOL(dev_open); -EXPORT_SYMBOL(dev_queue_xmit); -EXPORT_SYMBOL(dev_remove_pack); -EXPORT_SYMBOL(dev_set_allmulti); -EXPORT_SYMBOL(dev_set_promiscuity); -EXPORT_SYMBOL(dev_change_flags); -EXPORT_SYMBOL(dev_set_mtu); -EXPORT_SYMBOL(dev_set_mac_address); -EXPORT_SYMBOL(free_netdev); -EXPORT_SYMBOL(netdev_boot_setup_check); -EXPORT_SYMBOL(netdev_set_master); -EXPORT_SYMBOL(netdev_state_change); -EXPORT_SYMBOL(netif_receive_skb); -EXPORT_SYMBOL(netif_rx); -EXPORT_SYMBOL(register_gifconf); -EXPORT_SYMBOL(register_netdevice); -EXPORT_SYMBOL(register_netdevice_notifier); -EXPORT_SYMBOL(skb_checksum_help); -EXPORT_SYMBOL(synchronize_net); -EXPORT_SYMBOL(unregister_netdevice); -EXPORT_SYMBOL(unregister_netdevice_notifier); -EXPORT_SYMBOL(net_enable_timestamp); -EXPORT_SYMBOL(net_disable_timestamp); -EXPORT_SYMBOL(dev_get_flags); -EXPORT_SYMBOL(skb_checksum_setup); - -#if defined(CONFIG_BRIDGE) || defined(CONFIG_BRIDGE_MODULE) -EXPORT_SYMBOL(br_handle_frame_hook); -EXPORT_SYMBOL(br_fdb_get_hook); -EXPORT_SYMBOL(br_fdb_put_hook); -#endif - -#ifdef CONFIG_KMOD -EXPORT_SYMBOL(dev_load); -#endif - -EXPORT_PER_CPU_SYMBOL(softnet_data); |