/* * PCI Backend - Provides a Virtual PCI bus (with real devices) * to the frontend * * Author: Ryan Wilson */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include #include #include #include #include "pciback.h" #define PCI_SLOT_MAX 32 struct vpci_dev_data { /* Access to dev_list must be protected by lock */ struct list_head dev_list[PCI_SLOT_MAX]; struct mutex lock; }; static inline struct list_head *list_first(struct list_head *head) { return head->next; } static struct pci_dev *__xen_pcibk_get_pci_dev(struct xen_pcibk_device *pdev, unsigned int domain, unsigned int bus, unsigned int devfn) { struct pci_dev_entry *entry; struct pci_dev *dev = NULL; struct vpci_dev_data *vpci_dev = pdev->pci_dev_data; if (domain != 0 || bus != 0) return NULL; if (PCI_SLOT(devfn) < PCI_SLOT_MAX) { mutex_lock(&vpci_dev->lock); list_for_each_entry(entry, &vpci_dev->dev_list[PCI_SLOT(devfn)], list) { if (PCI_FUNC(entry->dev->devfn) == PCI_FUNC(devfn)) { dev = entry->dev; break; } } mutex_unlock(&vpci_dev->lock); } return dev; } static inline int match_slot(struct pci_dev *l, struct pci_dev *r) { if (pci_domain_nr(l->bus) == pci_domain_nr(r->bus) && l->bus == r->bus && PCI_SLOT(l->devfn) == PCI_SLOT(r->devfn)) return 1; return 0; } static int __xen_pcibk_add_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev, int devid, publish_pci_dev_cb publish_cb) { int err = 0, slot, func = -1; struct pci_dev_entry *t, *dev_entry; struct vpci_dev_data *vpci_dev = pdev->pci_dev_data; if ((dev->class >> 24) == PCI_BASE_CLASS_BRIDGE) { err = -EFAULT; xenbus_dev_fatal(pdev->xdev, err, "Can't export bridges on the virtual PCI bus"); goto out; } dev_entry = kmalloc(sizeof(*dev_entry), GFP_KERNEL); if (!dev_entry) { err = -ENOMEM; xenbus_dev_fatal(pdev->xdev, err, "Error adding entry to virtual PCI bus"); goto out; } dev_entry->dev = dev; mutex_lock(&vpci_dev->lock); /* * Keep multi-function devices together on the virtual PCI bus, except * virtual functions. */ if (!dev->is_virtfn) { for (slot = 0; slot < PCI_SLOT_MAX; slot++) { if (list_empty(&vpci_dev->dev_list[slot])) continue; t = list_entry(list_first(&vpci_dev->dev_list[slot]), struct pci_dev_entry, list); if (match_slot(dev, t->dev)) { pr_info("vpci: %s: assign to virtual slot %d func %d\n", pci_name(dev), slot, PCI_FUNC(dev->devfn)); list_add_tail(&dev_entry->list, &vpci_dev->dev_list[slot]); func = PCI_FUNC(dev->devfn); goto unlock; } } } /* Assign to a new slot on the virtual PCI bus */ for (slot = 0; slot < PCI_SLOT_MAX; slot++) { if (list_empty(&vpci_dev->dev_list[slot])) { pr_info("vpci: %s: assign to virtual slot %d\n", pci_name(dev), slot); list_add_tail(&dev_entry->list, &vpci_dev->dev_list[slot]); func = dev->is_virtfn ? 0 : PCI_FUNC(dev->devfn); goto unlock; } } err = -ENOMEM; xenbus_dev_fatal(pdev->xdev, err, "No more space on root virtual PCI bus"); unlock: mutex_unlock(&vpci_dev->lock); /* Publish this device. */ if (!err) err = publish_cb(pdev, 0, 0, PCI_DEVFN(slot, func), devid); else kfree(dev_entry); out: return err; } static void __xen_pcibk_release_pci_dev(struct xen_pcibk_device *pdev, struct pci_dev *dev, bool lock) { int slot; struct vpci_dev_data *vpci_dev = pdev->pci_dev_data; struct pci_dev *found_dev = NULL; mutex_lock(&vpci_dev->lock); for (slot = 0; slot < PCI_SLOT_MAX; slot++) { struct pci_dev_entry *e; list_for_each_entry(e, &vpci_dev->dev_list[slot], list) { if (e->dev == dev) { list_del(&e->list); found_dev = e->dev; kfree(e); goto out; } } } out: mutex_unlock(&vpci_dev->lock); if (found_dev) { if (lock) device_lock(&found_dev->dev); pcistub_put_pci_dev(found_dev); if (lock) device_unlock(&found_dev->dev); } } static int __xen_pcibk_init_devices(struct xen_pcibk_device *pdev) { int slot; struct vpci_dev_data *vpci_dev; vpci_dev = kmalloc(sizeof(*vpci_dev), GFP_KERNEL); if (!vpci_dev) return -ENOMEM; mutex_init(&vpci_dev->lock); for (slot = 0; slot < PCI_SLOT_MAX; slot++) INIT_LIST_HEAD(&vpci_dev->dev_list[slot]); pdev->pci_dev_data = vpci_dev; return 0; } static int __xen_pcibk_publish_pci_roots(struct xen_pcibk_device *pdev, publish_pci_root_cb publish_cb) { /* The Virtual PCI bus has only one root */ return publish_cb(pdev, 0, 0); } static void __xen_pcibk_release_devices(struct xen_pcibk_device *pdev) { int slot; struct vpci_dev_data *vpci_dev = pdev->pci_dev_data; for (slot = 0; slot < PCI_SLOT_MAX; slot++) { struct pci_dev_entry *e, *tmp; list_for_each_entry_safe(e, tmp, &vpci_dev->dev_list[slot], list) { struct pci_dev *dev = e->dev; list_del(&e->list); device_lock(&dev->dev); pcistub_put_pci_dev(dev); device_unlock(&dev->dev); kfree(e); } } kfree(vpci_dev); pdev->pci_dev_data = NULL; } static int __xen_pcibk_get_pcifront_dev(struct pci_dev *pcidev, struct xen_pcibk_device *pdev, unsigned int *domain, unsigned int *bus, unsigned int *devfn) { struct pci_dev_entry *entry; struct pci_dev *dev = NULL; struct vpci_dev_data *vpci_dev = pdev->pci_dev_data; int found = 0, slot; mutex_lock(&vpci_dev->lock); for (slot = 0; slot < PCI_SLOT_MAX; slot++) { list_for_each_entry(entry, &vpci_dev->dev_list[slot], list) { dev = entry->dev; if (dev && dev->bus->number == pcidev->bus->number && pci_domain_nr(dev->bus) == pci_domain_nr(pcidev->bus) && dev->devfn == pcidev->devfn) { found = 1; *domain = 0; *bus = 0; *devfn = PCI_DEVFN(slot, PCI_FUNC(pcidev->devfn)); } } } mutex_unlock(&vpci_dev->lock); return found; } const struct xen_pcibk_backend xen_pcibk_vpci_backend = { .name = "vpci", .init = __xen_pcibk_init_devices, .free = __xen_pcibk_release_devices, .find = __xen_pcibk_get_pcifront_dev, .publish = __xen_pcibk_publish_pci_roots, .release = __xen_pcibk_release_pci_dev, .add = __xen_pcibk_add_pci_dev, .get = __xen_pcibk_get_pci_dev, }; g'>Pull networking fixes from David Miller: 1) GTP fixes from Andreas Schultz (missing genl module alias, clear IP DF on transmit). 2) Netfilter needs to reflect the fwmark when sending resets, from Pau Espin Pedrol. 3) nftable dump OOPS fix from Liping Zhang. 4) Fix erroneous setting of VIRTIO_NET_HDR_F_DATA_VALID on transmit, from Rolf Neugebauer. 5) Fix build error of ipt_CLUSTERIP when procfs is disabled, from Arnd Bergmann. 6) Fix regression in handling of NETIF_F_SG in harmonize_features(), from Eric Dumazet. 7) Fix RTNL deadlock wrt. lwtunnel module loading, from David Ahern. 8) tcp_fastopen_create_child() needs to setup tp->max_window, from Alexey Kodanev. 9) Missing kmemdup() failure check in ipv6 segment routing code, from Eric Dumazet. 10) Don't execute unix_bind() under the bindlock, otherwise we deadlock with splice. From WANG Cong. 11) ip6_tnl_parse_tlv_enc_lim() potentially reallocates the skb buffer, therefore callers must reload cached header pointers into that skb. Fix from Eric Dumazet. 12) Fix various bugs in legacy IRQ fallback handling in alx driver, from Tobias Regnery. 13) Do not allow lwtunnel drivers to be unloaded while they are referenced by active instances, from Robert Shearman. 14) Fix truncated PHY LED trigger names, from Geert Uytterhoeven. 15) Fix a few regressions from virtio_net XDP support, from John Fastabend and Jakub Kicinski. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (102 commits) ISDN: eicon: silence misleading array-bounds warning net: phy: micrel: add support for KSZ8795 gtp: fix cross netns recv on gtp socket gtp: clear DF bit on GTP packet tx gtp: add genl family modules alias tcp: don't annotate mark on control socket from tcp_v6_send_response() ravb: unmap descriptors when freeing rings virtio_net: reject XDP programs using header adjustment virtio_net: use dev_kfree_skb for small buffer XDP receive r8152: check rx after napi is enabled r8152: re-schedule napi for tx r8152: avoid start_xmit to schedule napi when napi is disabled r8152: avoid start_xmit to call napi_schedule during autosuspend net: dsa: Bring back device detaching in dsa_slave_suspend() net: phy: leds: Fix truncated LED trigger names net: phy: leds: Break dependency of phy.h on phy_led_triggers.h net: phy: leds: Clear phy_num_led_triggers on failure to avoid crash net-next: ethernet: mediatek: change the compatible string Documentation: devicetree: change the mediatek ethernet compatible string bnxt_en: Fix RTNL lock usage on bnxt_get_port_module_status(). ...
Diffstat (limited to 'net/ipv6/af_inet6.c')