litmus-rt.git - The LITMUS^RT kernel.

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author	Bjorn Helgaas <bhelgaas@google.com>	2012-09-17 17:44:20 -0400
committer	Bjorn Helgaas <bhelgaas@google.com>	2012-09-17 17:44:20 -0400
commit	b895e663f4ade8d8546bc57ea22b40e4bc993c6c (patch)
tree	22f754338aa4e20d5ce48065c0f109d41a58a4e9
parent	6dabee73d46bfafb8c588b21b14606914de97ee6 (diff)
parent	2ccc246d9c6eaa6596818ff917721a444acd0b61 (diff)

Merge branch 'pci/jiang-get-domain-bus-slot' into next

* pci/jiang-get-domain-bus-slot: xen-pcifront: Use hotplug-safe pci_get_domain_bus_and_slot() PCI: Use hotplug-safe pci_get_domain_bus_and_slot() PCI/cpcihp: Use hotplug-safe pci_get_domain_bus_and_slot() PCI/vga: Use hotplug-safe pci_get_domain_bus_and_slot() ia64/PCI: Use hotplug-safe pci_get_domain_bus_and_slot()

Diffstat

-rw-r--r--

arch/ia64/sn/kernel/io_common.c

-rw-r--r--

drivers/gpu/vga/vgaarb.c

-rw-r--r--

drivers/pci/hotplug/cpcihp_generic.c

-rw-r--r--

drivers/pci/iov.c

-rw-r--r--

drivers/pci/xen-pcifront.c

5 files changed, 10 insertions, 35 deletions

 {
         int segment = pci_domain_nr(dev->bus);
         struct pcibus_bussoft *bs;
-        struct pci_bus *host_pci_bus;
         struct pci_dev *host_pci_dev;
         unsigned int bus_no, devfn;
         bus_no = (pcidev_info->pdi_slot_host_handle >> 32) & 0xff;
         devfn = pcidev_info->pdi_slot_host_handle & 0xffffffff;
-        host_pci_bus = pci_find_bus(segment, bus_no);
+        host_pci_dev = pci_get_domain_bus_and_slot(segment, bus_no, devfn);
-        host_pci_dev = pci_get_slot(host_pci_bus, devfn);
         pcidev_info->host_pci_dev = host_pci_dev;
         pcidev_info->pdi_linux_pcidev = dev;
                 }
         } else if (strncmp(curr_pos, "target ", 7) == 0) {
-                struct pci_bus *pbus;
                 unsigned int domain, bus, devfn;
                 struct vga_device *vgadev;
                         pr_debug("vgaarb: %s ==> %x:%x:%x.%x\n", curr_pos,
                                 domain, bus, PCI_SLOT(devfn), PCI_FUNC(devfn));
-                        pbus = pci_find_bus(domain, bus);
+                        pdev = pci_get_domain_bus_and_slot(domain, bus, devfn);
-                        pr_debug("vgaarb: pbus %p\n", pbus);
-                        if (pbus == NULL) {
-                                pr_err("vgaarb: invalid PCI domain and/or bus address %x:%x\n",
-                                        domain, bus);
-                                ret_val = -ENODEV;
-                                goto done;
-                        }
-                        pdev = pci_get_slot(pbus, devfn);
                         pr_debug("vgaarb: pdev %p\n", pdev);
                         if (!pdev) {
-                                pr_err("vgaarb: invalid PCI address %x:%x\n",
+                                pr_err("vgaarb: invalid PCI address %x:%x:%x\n",
-                                        bus, devfn);
+                                        domain, bus, devfn);
                                 ret_val = -ENODEV;
                                 goto done;
                         }
         if(!r)
                 return -EBUSY;
-        bus = pci_find_bus(0, bridge_busnr);
+        dev = pci_get_domain_bus_and_slot(0, bridge_busnr,
-        if (!bus) {
+                                          PCI_DEVFN(bridge_slot, 0));
-                err("Invalid bus number %d", bridge_busnr);
-                return -EINVAL;
-        }
-        dev = pci_get_slot(bus, PCI_DEVFN(bridge_slot, 0));
         if(!dev || dev->hdr_type != PCI_HEADER_TYPE_BRIDGE) {
                 err("Invalid bridge device %s", bridge);
                 pci_dev_put(dev);
 static void virtfn_remove(struct pci_dev *dev, int id, int reset)
 {
         char buf[VIRTFN_ID_LEN];
-        struct pci_bus *bus;
         struct pci_dev *virtfn;
         struct pci_sriov *iov = dev->sriov;
-        bus = pci_find_bus(pci_domain_nr(dev->bus), virtfn_bus(dev, id));
+        virtfn = pci_get_domain_bus_and_slot(pci_domain_nr(dev->bus),
-        if (!bus)
+                        virtfn_bus(dev, id), virtfn_devfn(dev, id));
-                return;
-        virtfn = pci_get_slot(bus, virtfn_devfn(dev, id));
         if (!virtfn)
                 return;
         int err = 0;
         int i, num_devs;
         unsigned int domain, bus, slot, func;
-        struct pci_bus *pci_bus;
         struct pci_dev *pci_dev;
         char str[64];
                         goto out;
                 }
-                pci_bus = pci_find_bus(domain, bus);
+                pci_dev = pci_get_domain_bus_and_slot(domain, bus,
-                if (!pci_bus) {
+                                PCI_DEVFN(slot, func));
-                        dev_dbg(&pdev->xdev->dev, "Cannot get bus %04x:%02x\n",
-                                domain, bus);
-                        continue;
-                }
-                pci_dev = pci_get_slot(pci_bus, PCI_DEVFN(slot, func));
                 if (!pci_dev) {
                         dev_dbg(&pdev->xdev->dev,
                                 "Cannot get PCI device %04x:%02x:%02x.%d\n",

/* * xfrm_state.c * * Changes: * Mitsuru KANDA @USAGI * Kazunori MIYAZAWA @USAGI * Kunihiro Ishiguro <kunihiro@ipinfusion.com> * IPv6 support * YOSHIFUJI Hideaki @USAGI * Split up af-specific functions * Derek Atkins <derek@ihtfp.com> * Add UDP Encapsulation * */ #include <linux/workqueue.h> #include <net/xfrm.h> #include <linux/pfkeyv2.h> #include <linux/ipsec.h> #include <linux/module.h> #include <linux/cache.h> #include <linux/audit.h> #include <asm/uaccess.h> #include <linux/ktime.h> #include <linux/slab.h> #include <linux/interrupt.h> #include <linux/kernel.h> #include "xfrm_hash.h" /* Each xfrm_state may be linked to two tables: 1. Hash table by (spi,daddr,ah/esp) to find SA by SPI. (input,ctl) 2. Hash table by (daddr,family,reqid) to find what SAs exist for given destination/tunnel endpoint. (output) */ static DEFINE_SPINLOCK(xfrm_state_lock); static unsigned int xfrm_state_hashmax __read_mostly = 1 * 1024 * 1024; static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family); static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo); static inline unsigned int xfrm_dst_hash(struct net *net, const xfrm_address_t *daddr, const xfrm_address_t *saddr, u32 reqid, unsigned short family) { return __xfrm_dst_hash(daddr, saddr, reqid, family, net->xfrm.state_hmask); } static inline unsigned int xfrm_src_hash(struct net *net, const xfrm_address_t *daddr, const xfrm_address_t *saddr, unsigned short family) { return __xfrm_src_hash(daddr, saddr, family, net->xfrm.state_hmask); } static inline unsigned int xfrm_spi_hash(struct net *net, const xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) { return __xfrm_spi_hash(daddr, spi, proto, family, net->xfrm.state_hmask); } static void xfrm_hash_transfer(struct hlist_head *list, struct hlist_head *ndsttable, struct hlist_head *nsrctable, struct hlist_head *nspitable, unsigned int nhashmask) { struct hlist_node *entry, *tmp; struct xfrm_state *x; hlist_for_each_entry_safe(x, entry, tmp, list, bydst) { unsigned int h; h = __xfrm_dst_hash(&x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family, nhashmask); hlist_add_head(&x->bydst, ndsttable+h); h = __xfrm_src_hash(&x->id.daddr, &x->props.saddr, x->props.family, nhashmask); hlist_add_head(&x->bysrc, nsrctable+h); if (x->id.spi) { h = __xfrm_spi_hash(&x->id.daddr, x->id.spi, x->id.proto, x->props.family, nhashmask); hlist_add_head(&x->byspi, nspitable+h); } } } static unsigned long xfrm_hash_new_size(unsigned int state_hmask) { return ((state_hmask + 1) << 1) * sizeof(struct hlist_head); } static DEFINE_MUTEX(hash_resize_mutex); static void xfrm_hash_resize(struct work_struct *work) { struct net *net = container_of(work, struct net, xfrm.state_hash_work); struct hlist_head *ndst, *nsrc, *nspi, *odst, *osrc, *ospi; unsigned long nsize, osize; unsigned int nhashmask, ohashmask; int i; mutex_lock(&hash_resize_mutex); nsize = xfrm_hash_new_size(net->xfrm.state_hmask); ndst = xfrm_hash_alloc(nsize); if (!ndst) goto out_unlock; nsrc = xfrm_hash_alloc(nsize); if (!nsrc) { xfrm_hash_free(ndst, nsize); goto out_unlock; } nspi = xfrm_hash_alloc(nsize); if (!nspi) { xfrm_hash_free(ndst, nsize); xfrm_hash_free(nsrc, nsize); goto out_unlock; } spin_lock_bh(&xfrm_state_lock); nhashmask = (nsize / sizeof(struct hlist_head)) - 1U; for (i = net->xfrm.state_hmask; i >= 0; i--) xfrm_hash_transfer(net->xfrm.state_bydst+i, ndst, nsrc, nspi, nhashmask); odst = net->xfrm.state_bydst; osrc = net->xfrm.state_bysrc; ospi = net->xfrm.state_byspi; ohashmask = net->xfrm.state_hmask; net->xfrm.state_bydst = ndst; net->xfrm.state_bysrc = nsrc; net->xfrm.state_byspi = nspi; net->xfrm.state_hmask = nhashmask; spin_unlock_bh(&xfrm_state_lock); osize = (ohashmask + 1) * sizeof(struct hlist_head); xfrm_hash_free(odst, osize); xfrm_hash_free(osrc, osize); xfrm_hash_free(ospi, osize); out_unlock: mutex_unlock(&hash_resize_mutex); } static DEFINE_RWLOCK(xfrm_state_afinfo_lock); static struct xfrm_state_afinfo *xfrm_state_afinfo[NPROTO]; static DEFINE_SPINLOCK(xfrm_state_gc_lock); int __xfrm_state_delete(struct xfrm_state *x); int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol); void km_state_expired(struct xfrm_state *x, int hard, u32 pid); static struct xfrm_state_afinfo *xfrm_state_lock_afinfo(unsigned int family) { struct xfrm_state_afinfo *afinfo; if (unlikely(family >= NPROTO)) return NULL; write_lock_bh(&xfrm_state_afinfo_lock); afinfo = xfrm_state_afinfo[family]; if (unlikely(!afinfo)) write_unlock_bh(&xfrm_state_afinfo_lock); return afinfo; } static void xfrm_state_unlock_afinfo(struct xfrm_state_afinfo *afinfo) __releases(xfrm_state_afinfo_lock) { write_unlock_bh(&xfrm_state_afinfo_lock); } int xfrm_register_type(const struct xfrm_type *type, unsigned short family) { struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); const struct xfrm_type **typemap; int err = 0; if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; typemap = afinfo->type_map; if (likely(typemap[type->proto] == NULL)) typemap[type->proto] = type; else err = -EEXIST; xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_register_type); int xfrm_unregister_type(const struct xfrm_type *type, unsigned short family) { struct xfrm_state_afinfo *afinfo = xfrm_state_lock_afinfo(family); const struct xfrm_type **typemap; int err = 0; if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; typemap = afinfo->type_map; if (unlikely(typemap[type->proto] != type)) err = -ENOENT; else typemap[type->proto] = NULL; xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_unregister_type); static const struct xfrm_type *xfrm_get_type(u8 proto, unsigned short family) { struct xfrm_state_afinfo *afinfo; const struct xfrm_type **typemap; const struct xfrm_type *type; int modload_attempted = 0; retry: afinfo = xfrm_state_get_afinfo(family); if (unlikely(afinfo == NULL)) return NULL; typemap = afinfo->type_map; type = typemap[proto]; if (unlikely(type && !try_module_get(type->owner))) type = NULL; if (!type && !modload_attempted) { xfrm_state_put_afinfo(afinfo); request_module("xfrm-type-%d-%d", family, proto); modload_attempted = 1; goto retry; } xfrm_state_put_afinfo(afinfo); return type; } static void xfrm_put_type(const struct xfrm_type *type) { module_put(type->owner); } int xfrm_register_mode(struct xfrm_mode *mode, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode **modemap; int err; if (unlikely(mode->encap >= XFRM_MODE_MAX)) return -EINVAL; afinfo = xfrm_state_lock_afinfo(family); if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; err = -EEXIST; modemap = afinfo->mode_map; if (modemap[mode->encap]) goto out; err = -ENOENT; if (!try_module_get(afinfo->owner)) goto out; mode->afinfo = afinfo; modemap[mode->encap] = mode; err = 0; out: xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_register_mode); int xfrm_unregister_mode(struct xfrm_mode *mode, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode **modemap; int err; if (unlikely(mode->encap >= XFRM_MODE_MAX)) return -EINVAL; afinfo = xfrm_state_lock_afinfo(family); if (unlikely(afinfo == NULL)) return -EAFNOSUPPORT; err = -ENOENT; modemap = afinfo->mode_map; if (likely(modemap[mode->encap] == mode)) { modemap[mode->encap] = NULL; module_put(mode->afinfo->owner); err = 0; } xfrm_state_unlock_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_unregister_mode); static struct xfrm_mode *xfrm_get_mode(unsigned int encap, int family) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode *mode; int modload_attempted = 0; if (unlikely(encap >= XFRM_MODE_MAX)) return NULL; retry: afinfo = xfrm_state_get_afinfo(family); if (unlikely(afinfo == NULL)) return NULL; mode = afinfo->mode_map[encap]; if (unlikely(mode && !try_module_get(mode->owner))) mode = NULL; if (!mode && !modload_attempted) { xfrm_state_put_afinfo(afinfo); request_module("xfrm-mode-%d-%d", family, encap); modload_attempted = 1; goto retry; } xfrm_state_put_afinfo(afinfo); return mode; } static void xfrm_put_mode(struct xfrm_mode *mode) { module_put(mode->owner); } static void xfrm_state_gc_destroy(struct xfrm_state *x) { tasklet_hrtimer_cancel(&x->mtimer); del_timer_sync(&x->rtimer); kfree(x->aalg); kfree(x->ealg); kfree(x->calg); kfree(x->encap); kfree(x->coaddr); kfree(x->replay_esn); kfree(x->preplay_esn); if (x->inner_mode) xfrm_put_mode(x->inner_mode); if (x->inner_mode_iaf) xfrm_put_mode(x->inner_mode_iaf); if (x->outer_mode) xfrm_put_mode(x->outer_mode); if (x->type) { x->type->destructor(x); xfrm_put_type(x->type); } security_xfrm_state_free(x); kfree(x); } static void xfrm_state_gc_task(struct work_struct *work) { struct net *net = container_of(work, struct net, xfrm.state_gc_work); struct xfrm_state *x; struct hlist_node *entry, *tmp; struct hlist_head gc_list; spin_lock_bh(&xfrm_state_gc_lock); hlist_move_list(&net->xfrm.state_gc_list, &gc_list); spin_unlock_bh(&xfrm_state_gc_lock); hlist_for_each_entry_safe(x, entry, tmp, &gc_list, gclist) xfrm_state_gc_destroy(x); wake_up(&net->xfrm.km_waitq); } static inline unsigned long make_jiffies(long secs) { if (secs >= (MAX_SCHEDULE_TIMEOUT-1)/HZ) return MAX_SCHEDULE_TIMEOUT-1; else return secs*HZ; } static enum hrtimer_restart xfrm_timer_handler(struct hrtimer * me) { struct tasklet_hrtimer *thr = container_of(me, struct tasklet_hrtimer, timer); struct xfrm_state *x = container_of(thr, struct xfrm_state, mtimer); struct net *net = xs_net(x); unsigned long now = get_seconds(); long next = LONG_MAX; int warn = 0; int err = 0; spin_lock(&x->lock); if (x->km.state == XFRM_STATE_DEAD) goto out; if (x->km.state == XFRM_STATE_EXPIRED) goto expired; if (x->lft.hard_add_expires_seconds) { long tmo = x->lft.hard_add_expires_seconds + x->curlft.add_time - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (x->lft.hard_use_expires_seconds) { long tmo = x->lft.hard_use_expires_seconds + (x->curlft.use_time ? : now) - now; if (tmo <= 0) goto expired; if (tmo < next) next = tmo; } if (x->km.dying) goto resched; if (x->lft.soft_add_expires_seconds) { long tmo = x->lft.soft_add_expires_seconds + x->curlft.add_time - now; if (tmo <= 0) warn = 1; else if (tmo < next) next = tmo; } if (x->lft.soft_use_expires_seconds) { long tmo = x->lft.soft_use_expires_seconds + (x->curlft.use_time ? : now) - now; if (tmo <= 0) warn = 1; else if (tmo < next) next = tmo; } x->km.dying = warn; if (warn) km_state_expired(x, 0, 0); resched: if (next != LONG_MAX){ tasklet_hrtimer_start(&x->mtimer, ktime_set(next, 0), HRTIMER_MODE_REL); } goto out; expired: if (x->km.state == XFRM_STATE_ACQ && x->id.spi == 0) { x->km.state = XFRM_STATE_EXPIRED; wake_up(&net->xfrm.km_waitq); next = 2; goto resched; } err = __xfrm_state_delete(x); if (!err && x->id.spi) km_state_expired(x, 1, 0); xfrm_audit_state_delete(x, err ? 0 : 1, audit_get_loginuid(current), audit_get_sessionid(current), 0); out: spin_unlock(&x->lock); return HRTIMER_NORESTART; } static void xfrm_replay_timer_handler(unsigned long data); struct xfrm_state *xfrm_state_alloc(struct net *net) { struct xfrm_state *x; x = kzalloc(sizeof(struct xfrm_state), GFP_ATOMIC); if (x) { write_pnet(&x->xs_net, net); atomic_set(&x->refcnt, 1); atomic_set(&x->tunnel_users, 0); INIT_LIST_HEAD(&x->km.all); INIT_HLIST_NODE(&x->bydst); INIT_HLIST_NODE(&x->bysrc); INIT_HLIST_NODE(&x->byspi); tasklet_hrtimer_init(&x->mtimer, xfrm_timer_handler, CLOCK_REALTIME, HRTIMER_MODE_ABS); setup_timer(&x->rtimer, xfrm_replay_timer_handler, (unsigned long)x); x->curlft.add_time = get_seconds(); x->lft.soft_byte_limit = XFRM_INF; x->lft.soft_packet_limit = XFRM_INF; x->lft.hard_byte_limit = XFRM_INF; x->lft.hard_packet_limit = XFRM_INF; x->replay_maxage = 0; x->replay_maxdiff = 0; x->inner_mode = NULL; x->inner_mode_iaf = NULL; spin_lock_init(&x->lock); } return x; } EXPORT_SYMBOL(xfrm_state_alloc); void __xfrm_state_destroy(struct xfrm_state *x) { struct net *net = xs_net(x); WARN_ON(x->km.state != XFRM_STATE_DEAD); spin_lock_bh(&xfrm_state_gc_lock); hlist_add_head(&x->gclist, &net->xfrm.state_gc_list); spin_unlock_bh(&xfrm_state_gc_lock); schedule_work(&net->xfrm.state_gc_work); } EXPORT_SYMBOL(__xfrm_state_destroy); int __xfrm_state_delete(struct xfrm_state *x) { struct net *net = xs_net(x); int err = -ESRCH; if (x->km.state != XFRM_STATE_DEAD) { x->km.state = XFRM_STATE_DEAD; spin_lock(&xfrm_state_lock); list_del(&x->km.all); hlist_del(&x->bydst); hlist_del(&x->bysrc); if (x->id.spi) hlist_del(&x->byspi); net->xfrm.state_num--; spin_unlock(&xfrm_state_lock); /* All xfrm_state objects are created by xfrm_state_alloc. * The xfrm_state_alloc call gives a reference, and that * is what we are dropping here. */ xfrm_state_put(x); err = 0; } return err; } EXPORT_SYMBOL(__xfrm_state_delete); int xfrm_state_delete(struct xfrm_state *x) { int err; spin_lock_bh(&x->lock); err = __xfrm_state_delete(x); spin_unlock_bh(&x->lock); return err; } EXPORT_SYMBOL(xfrm_state_delete); #ifdef CONFIG_SECURITY_NETWORK_XFRM static inline int xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) { int i, err = 0; for (i = 0; i <= net->xfrm.state_hmask; i++) { struct hlist_node *entry; struct xfrm_state *x; hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { if (xfrm_id_proto_match(x->id.proto, proto) && (err = security_xfrm_state_delete(x)) != 0) { xfrm_audit_state_delete(x, 0, audit_info->loginuid, audit_info->sessionid, audit_info->secid); return err; } } } return err; } #else static inline int xfrm_state_flush_secctx_check(struct net *net, u8 proto, struct xfrm_audit *audit_info) { return 0; } #endif int xfrm_state_flush(struct net *net, u8 proto, struct xfrm_audit *audit_info) { int i, err = 0, cnt = 0; spin_lock_bh(&xfrm_state_lock); err = xfrm_state_flush_secctx_check(net, proto, audit_info); if (err) goto out; err = -ESRCH; for (i = 0; i <= net->xfrm.state_hmask; i++) { struct hlist_node *entry; struct xfrm_state *x; restart: hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { if (!xfrm_state_kern(x) && xfrm_id_proto_match(x->id.proto, proto)) { xfrm_state_hold(x); spin_unlock_bh(&xfrm_state_lock); err = xfrm_state_delete(x); xfrm_audit_state_delete(x, err ? 0 : 1, audit_info->loginuid, audit_info->sessionid, audit_info->secid); xfrm_state_put(x); if (!err) cnt++; spin_lock_bh(&xfrm_state_lock); goto restart; } } } if (cnt) err = 0; out: spin_unlock_bh(&xfrm_state_lock); wake_up(&net->xfrm.km_waitq); return err; } EXPORT_SYMBOL(xfrm_state_flush); void xfrm_sad_getinfo(struct net *net, struct xfrmk_sadinfo *si) { spin_lock_bh(&xfrm_state_lock); si->sadcnt = net->xfrm.state_num; si->sadhcnt = net->xfrm.state_hmask; si->sadhmcnt = xfrm_state_hashmax; spin_unlock_bh(&xfrm_state_lock); } EXPORT_SYMBOL(xfrm_sad_getinfo); static int xfrm_init_tempstate(struct xfrm_state *x, const struct flowi *fl, const struct xfrm_tmpl *tmpl, const xfrm_address_t *daddr, const xfrm_address_t *saddr, unsigned short family) { struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -1; afinfo->init_tempsel(&x->sel, fl); if (family != tmpl->encap_family) { xfrm_state_put_afinfo(afinfo); afinfo = xfrm_state_get_afinfo(tmpl->encap_family); if (!afinfo) return -1; } afinfo->init_temprop(x, tmpl, daddr, saddr); xfrm_state_put_afinfo(afinfo); return 0; } static struct xfrm_state *__xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) { unsigned int h = xfrm_spi_hash(net, daddr, spi, proto, family); struct xfrm_state *x; struct hlist_node *entry; hlist_for_each_entry(x, entry, net->xfrm.state_byspi+h, byspi) { if (x->props.family != family || x->id.spi != spi || x->id.proto != proto || xfrm_addr_cmp(&x->id.daddr, daddr, family)) continue; if ((mark & x->mark.m) != x->mark.v) continue; xfrm_state_hold(x); return x; } return NULL; } static struct xfrm_state *__xfrm_state_lookup_byaddr(struct net *net, u32 mark, const xfrm_address_t *daddr, const xfrm_address_t *saddr, u8 proto, unsigned short family) { unsigned int h = xfrm_src_hash(net, daddr, saddr, family); struct xfrm_state *x; struct hlist_node *entry; hlist_for_each_entry(x, entry, net->xfrm.state_bysrc+h, bysrc) { if (x->props.family != family || x->id.proto != proto || xfrm_addr_cmp(&x->id.daddr, daddr, family) || xfrm_addr_cmp(&x->props.saddr, saddr, family)) continue; if ((mark & x->mark.m) != x->mark.v) continue; xfrm_state_hold(x); return x; } return NULL; } static inline struct xfrm_state * __xfrm_state_locate(struct xfrm_state *x, int use_spi, int family) { struct net *net = xs_net(x); u32 mark = x->mark.v & x->mark.m; if (use_spi) return __xfrm_state_lookup(net, mark, &x->id.daddr, x->id.spi, x->id.proto, family); else return __xfrm_state_lookup_byaddr(net, mark, &x->id.daddr, &x->props.saddr, x->id.proto, family); } static void xfrm_hash_grow_check(struct net *net, int have_hash_collision) { if (have_hash_collision && (net->xfrm.state_hmask + 1) < xfrm_state_hashmax && net->xfrm.state_num > net->xfrm.state_hmask) schedule_work(&net->xfrm.state_hash_work); } static void xfrm_state_look_at(struct xfrm_policy *pol, struct xfrm_state *x, const struct flowi *fl, unsigned short family, struct xfrm_state **best, int *acq_in_progress, int *error) { /* Resolution logic: * 1. There is a valid state with matching selector. Done. * 2. Valid state with inappropriate selector. Skip. * * Entering area of "sysdeps". * * 3. If state is not valid, selector is temporary, it selects * only session which triggered previous resolution. Key * manager will do something to install a state with proper * selector. */ if (x->km.state == XFRM_STATE_VALID) { if ((x->sel.family && !xfrm_selector_match(&x->sel, fl, x->sel.family)) || !security_xfrm_state_pol_flow_match(x, pol, fl)) return; if (!*best || (*best)->km.dying > x->km.dying || ((*best)->km.dying == x->km.dying && (*best)->curlft.add_time < x->curlft.add_time)) *best = x; } else if (x->km.state == XFRM_STATE_ACQ) { *acq_in_progress = 1; } else if (x->km.state == XFRM_STATE_ERROR || x->km.state == XFRM_STATE_EXPIRED) { if (xfrm_selector_match(&x->sel, fl, x->sel.family) && security_xfrm_state_pol_flow_match(x, pol, fl)) *error = -ESRCH; } } struct xfrm_state * xfrm_state_find(const xfrm_address_t *daddr, const xfrm_address_t *saddr, const struct flowi *fl, struct xfrm_tmpl *tmpl, struct xfrm_policy *pol, int *err, unsigned short family) { static xfrm_address_t saddr_wildcard = { }; struct net *net = xp_net(pol); unsigned int h, h_wildcard; struct hlist_node *entry; struct xfrm_state *x, *x0, *to_put; int acquire_in_progress = 0; int error = 0; struct xfrm_state *best = NULL; u32 mark = pol->mark.v & pol->mark.m; unsigned short encap_family = tmpl->encap_family; to_put = NULL; spin_lock_bh(&xfrm_state_lock); h = xfrm_dst_hash(net, daddr, saddr, tmpl->reqid, encap_family); hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { if (x->props.family == encap_family && x->props.reqid == tmpl->reqid && (mark & x->mark.m) == x->mark.v && !(x->props.flags & XFRM_STATE_WILDRECV) && xfrm_state_addr_check(x, daddr, saddr, encap_family) && tmpl->mode == x->props.mode && tmpl->id.proto == x->id.proto && (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) xfrm_state_look_at(pol, x, fl, encap_family, &best, &acquire_in_progress, &error); } if (best) goto found; h_wildcard = xfrm_dst_hash(net, daddr, &saddr_wildcard, tmpl->reqid, encap_family); hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h_wildcard, bydst) { if (x->props.family == encap_family && x->props.reqid == tmpl->reqid && (mark & x->mark.m) == x->mark.v && !(x->props.flags & XFRM_STATE_WILDRECV) && xfrm_state_addr_check(x, daddr, saddr, encap_family) && tmpl->mode == x->props.mode && tmpl->id.proto == x->id.proto && (tmpl->id.spi == x->id.spi || !tmpl->id.spi)) xfrm_state_look_at(pol, x, fl, encap_family, &best, &acquire_in_progress, &error); } found: x = best; if (!x && !error && !acquire_in_progress) { if (tmpl->id.spi && (x0 = __xfrm_state_lookup(net, mark, daddr, tmpl->id.spi, tmpl->id.proto, encap_family)) != NULL) { to_put = x0; error = -EEXIST; goto out; } x = xfrm_state_alloc(net); if (x == NULL) { error = -ENOMEM; goto out; } /* Initialize temporary state matching only * to current session. */ xfrm_init_tempstate(x, fl, tmpl, daddr, saddr, family); memcpy(&x->mark, &pol->mark, sizeof(x->mark)); error = security_xfrm_state_alloc_acquire(x, pol->security, fl->flowi_secid); if (error) { x->km.state = XFRM_STATE_DEAD; to_put = x; x = NULL; goto out; } if (km_query(x, tmpl, pol) == 0) { x->km.state = XFRM_STATE_ACQ; list_add(&x->km.all, &net->xfrm.state_all); hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); h = xfrm_src_hash(net, daddr, saddr, encap_family); hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); if (x->id.spi) { h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, encap_family); hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); } x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); net->xfrm.state_num++; xfrm_hash_grow_check(net, x->bydst.next != NULL); } else { x->km.state = XFRM_STATE_DEAD; to_put = x; x = NULL; error = -ESRCH; } } out: if (x) xfrm_state_hold(x); else *err = acquire_in_progress ? -EAGAIN : error; spin_unlock_bh(&xfrm_state_lock); if (to_put) xfrm_state_put(to_put); return x; } struct xfrm_state * xfrm_stateonly_find(struct net *net, u32 mark, xfrm_address_t *daddr, xfrm_address_t *saddr, unsigned short family, u8 mode, u8 proto, u32 reqid) { unsigned int h; struct xfrm_state *rx = NULL, *x = NULL; struct hlist_node *entry; spin_lock(&xfrm_state_lock); h = xfrm_dst_hash(net, daddr, saddr, reqid, family); hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { if (x->props.family == family && x->props.reqid == reqid && (mark & x->mark.m) == x->mark.v && !(x->props.flags & XFRM_STATE_WILDRECV) && xfrm_state_addr_check(x, daddr, saddr, family) && mode == x->props.mode && proto == x->id.proto && x->km.state == XFRM_STATE_VALID) { rx = x; break; } } if (rx) xfrm_state_hold(rx); spin_unlock(&xfrm_state_lock); return rx; } EXPORT_SYMBOL(xfrm_stateonly_find); static void __xfrm_state_insert(struct xfrm_state *x) { struct net *net = xs_net(x); unsigned int h; list_add(&x->km.all, &net->xfrm.state_all); h = xfrm_dst_hash(net, &x->id.daddr, &x->props.saddr, x->props.reqid, x->props.family); hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); h = xfrm_src_hash(net, &x->id.daddr, &x->props.saddr, x->props.family); hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); if (x->id.spi) { h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); } tasklet_hrtimer_start(&x->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); if (x->replay_maxage) mod_timer(&x->rtimer, jiffies + x->replay_maxage); wake_up(&net->xfrm.km_waitq); net->xfrm.state_num++; xfrm_hash_grow_check(net, x->bydst.next != NULL); } /* xfrm_state_lock is held */ static void __xfrm_state_bump_genids(struct xfrm_state *xnew) { struct net *net = xs_net(xnew); unsigned short family = xnew->props.family; u32 reqid = xnew->props.reqid; struct xfrm_state *x; struct hlist_node *entry; unsigned int h; u32 mark = xnew->mark.v & xnew->mark.m; h = xfrm_dst_hash(net, &xnew->id.daddr, &xnew->props.saddr, reqid, family); hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { if (x->props.family == family && x->props.reqid == reqid && (mark & x->mark.m) == x->mark.v && !xfrm_addr_cmp(&x->id.daddr, &xnew->id.daddr, family) && !xfrm_addr_cmp(&x->props.saddr, &xnew->props.saddr, family)) x->genid++; } } void xfrm_state_insert(struct xfrm_state *x) { spin_lock_bh(&xfrm_state_lock); __xfrm_state_bump_genids(x); __xfrm_state_insert(x); spin_unlock_bh(&xfrm_state_lock); } EXPORT_SYMBOL(xfrm_state_insert); /* xfrm_state_lock is held */ static struct xfrm_state *__find_acq_core(struct net *net, struct xfrm_mark *m, unsigned short family, u8 mode, u32 reqid, u8 proto, const xfrm_address_t *daddr, const xfrm_address_t *saddr, int create) { unsigned int h = xfrm_dst_hash(net, daddr, saddr, reqid, family); struct hlist_node *entry; struct xfrm_state *x; u32 mark = m->v & m->m; hlist_for_each_entry(x, entry, net->xfrm.state_bydst+h, bydst) { if (x->props.reqid != reqid || x->props.mode != mode || x->props.family != family || x->km.state != XFRM_STATE_ACQ || x->id.spi != 0 || x->id.proto != proto || (mark & x->mark.m) != x->mark.v || xfrm_addr_cmp(&x->id.daddr, daddr, family) || xfrm_addr_cmp(&x->props.saddr, saddr, family)) continue; xfrm_state_hold(x); return x; } if (!create) return NULL; x = xfrm_state_alloc(net); if (likely(x)) { switch (family) { case AF_INET: x->sel.daddr.a4 = daddr->a4; x->sel.saddr.a4 = saddr->a4; x->sel.prefixlen_d = 32; x->sel.prefixlen_s = 32; x->props.saddr.a4 = saddr->a4; x->id.daddr.a4 = daddr->a4; break; case AF_INET6: ipv6_addr_copy((struct in6_addr *)x->sel.daddr.a6, (const struct in6_addr *)daddr); ipv6_addr_copy((struct in6_addr *)x->sel.saddr.a6, (const struct in6_addr *)saddr); x->sel.prefixlen_d = 128; x->sel.prefixlen_s = 128; ipv6_addr_copy((struct in6_addr *)x->props.saddr.a6, (const struct in6_addr *)saddr); ipv6_addr_copy((struct in6_addr *)x->id.daddr.a6, (const struct in6_addr *)daddr); break; } x->km.state = XFRM_STATE_ACQ; x->id.proto = proto; x->props.family = family; x->props.mode = mode; x->props.reqid = reqid; x->mark.v = m->v; x->mark.m = m->m; x->lft.hard_add_expires_seconds = net->xfrm.sysctl_acq_expires; xfrm_state_hold(x); tasklet_hrtimer_start(&x->mtimer, ktime_set(net->xfrm.sysctl_acq_expires, 0), HRTIMER_MODE_REL); list_add(&x->km.all, &net->xfrm.state_all); hlist_add_head(&x->bydst, net->xfrm.state_bydst+h); h = xfrm_src_hash(net, daddr, saddr, family); hlist_add_head(&x->bysrc, net->xfrm.state_bysrc+h); net->xfrm.state_num++; xfrm_hash_grow_check(net, x->bydst.next != NULL); } return x; } static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq); int xfrm_state_add(struct xfrm_state *x) { struct net *net = xs_net(x); struct xfrm_state *x1, *to_put; int family; int err; u32 mark = x->mark.v & x->mark.m; int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); family = x->props.family; to_put = NULL; spin_lock_bh(&xfrm_state_lock); x1 = __xfrm_state_locate(x, use_spi, family); if (x1) { to_put = x1; x1 = NULL; err = -EEXIST; goto out; } if (use_spi && x->km.seq) { x1 = __xfrm_find_acq_byseq(net, mark, x->km.seq); if (x1 && ((x1->id.proto != x->id.proto) || xfrm_addr_cmp(&x1->id.daddr, &x->id.daddr, family))) { to_put = x1; x1 = NULL; } } if (use_spi && !x1) x1 = __find_acq_core(net, &x->mark, family, x->props.mode, x->props.reqid, x->id.proto, &x->id.daddr, &x->props.saddr, 0); __xfrm_state_bump_genids(x); __xfrm_state_insert(x); err = 0; out: spin_unlock_bh(&xfrm_state_lock); if (x1) { xfrm_state_delete(x1); xfrm_state_put(x1); } if (to_put) xfrm_state_put(to_put); return err; } EXPORT_SYMBOL(xfrm_state_add); #ifdef CONFIG_XFRM_MIGRATE static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) { struct net *net = xs_net(orig); int err = -ENOMEM; struct xfrm_state *x = xfrm_state_alloc(net); if (!x) goto out; memcpy(&x->id, &orig->id, sizeof(x->id)); memcpy(&x->sel, &orig->sel, sizeof(x->sel)); memcpy(&x->lft, &orig->lft, sizeof(x->lft)); x->props.mode = orig->props.mode; x->props.replay_window = orig->props.replay_window; x->props.reqid = orig->props.reqid; x->props.family = orig->props.family; x->props.saddr = orig->props.saddr; if (orig->aalg) { x->aalg = xfrm_algo_auth_clone(orig->aalg); if (!x->aalg) goto error; } x->props.aalgo = orig->props.aalgo; if (orig->ealg) { x->ealg = xfrm_algo_clone(orig->ealg); if (!x->ealg) goto error; } x->props.ealgo = orig->props.ealgo; if (orig->calg) { x->calg = xfrm_algo_clone(orig->calg); if (!x->calg) goto error; } x->props.calgo = orig->props.calgo; if (orig->encap) { x->encap = kmemdup(orig->encap, sizeof(*x->encap), GFP_KERNEL); if (!x->encap) goto error; } if (orig->coaddr) { x->coaddr = kmemdup(orig->coaddr, sizeof(*x->coaddr), GFP_KERNEL); if (!x->coaddr) goto error; } if (orig->replay_esn) { err = xfrm_replay_clone(x, orig); if (err) goto error; } memcpy(&x->mark, &orig->mark, sizeof(x->mark)); err = xfrm_init_state(x); if (err) goto error; x->props.flags = orig->props.flags; x->curlft.add_time = orig->curlft.add_time; x->km.state = orig->km.state; x->km.seq = orig->km.seq; return x; error: xfrm_state_put(x); out: if (errp) *errp = err; return NULL; } /* xfrm_state_lock is held */ struct xfrm_state * xfrm_migrate_state_find(struct xfrm_migrate *m) { unsigned int h; struct xfrm_state *x; struct hlist_node *entry; if (m->reqid) { h = xfrm_dst_hash(&init_net, &m->old_daddr, &m->old_saddr, m->reqid, m->old_family); hlist_for_each_entry(x, entry, init_net.xfrm.state_bydst+h, bydst) { if (x->props.mode != m->mode || x->id.proto != m->proto) continue; if (m->reqid && x->props.reqid != m->reqid) continue; if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, m->old_family) || xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, m->old_family)) continue; xfrm_state_hold(x); return x; } } else { h = xfrm_src_hash(&init_net, &m->old_daddr, &m->old_saddr, m->old_family); hlist_for_each_entry(x, entry, init_net.xfrm.state_bysrc+h, bysrc) { if (x->props.mode != m->mode || x->id.proto != m->proto) continue; if (xfrm_addr_cmp(&x->id.daddr, &m->old_daddr, m->old_family) || xfrm_addr_cmp(&x->props.saddr, &m->old_saddr, m->old_family)) continue; xfrm_state_hold(x); return x; } } return NULL; } EXPORT_SYMBOL(xfrm_migrate_state_find); struct xfrm_state * xfrm_state_migrate(struct xfrm_state *x, struct xfrm_migrate *m) { struct xfrm_state *xc; int err; xc = xfrm_state_clone(x, &err); if (!xc) return NULL; memcpy(&xc->id.daddr, &m->new_daddr, sizeof(xc->id.daddr)); memcpy(&xc->props.saddr, &m->new_saddr, sizeof(xc->props.saddr)); /* add state */ if (!xfrm_addr_cmp(&x->id.daddr, &m->new_daddr, m->new_family)) { /* a care is needed when the destination address of the state is to be updated as it is a part of triplet */ xfrm_state_insert(xc); } else { if ((err = xfrm_state_add(xc)) < 0) goto error; } return xc; error: xfrm_state_put(xc); return NULL; } EXPORT_SYMBOL(xfrm_state_migrate); #endif int xfrm_state_update(struct xfrm_state *x) { struct xfrm_state *x1, *to_put; int err; int use_spi = xfrm_id_proto_match(x->id.proto, IPSEC_PROTO_ANY); to_put = NULL; spin_lock_bh(&xfrm_state_lock); x1 = __xfrm_state_locate(x, use_spi, x->props.family); err = -ESRCH; if (!x1) goto out; if (xfrm_state_kern(x1)) { to_put = x1; err = -EEXIST; goto out; } if (x1->km.state == XFRM_STATE_ACQ) { __xfrm_state_insert(x); x = NULL; } err = 0; out: spin_unlock_bh(&xfrm_state_lock); if (to_put) xfrm_state_put(to_put); if (err) return err; if (!x) { xfrm_state_delete(x1); xfrm_state_put(x1); return 0; } err = -EINVAL; spin_lock_bh(&x1->lock); if (likely(x1->km.state == XFRM_STATE_VALID)) { if (x->encap && x1->encap) memcpy(x1->encap, x->encap, sizeof(*x1->encap)); if (x->coaddr && x1->coaddr) { memcpy(x1->coaddr, x->coaddr, sizeof(*x1->coaddr)); } if (!use_spi && memcmp(&x1->sel, &x->sel, sizeof(x1->sel))) memcpy(&x1->sel, &x->sel, sizeof(x1->sel)); memcpy(&x1->lft, &x->lft, sizeof(x1->lft)); x1->km.dying = 0; tasklet_hrtimer_start(&x1->mtimer, ktime_set(1, 0), HRTIMER_MODE_REL); if (x1->curlft.use_time) xfrm_state_check_expire(x1); err = 0; x->km.state = XFRM_STATE_DEAD; __xfrm_state_put(x); } spin_unlock_bh(&x1->lock); xfrm_state_put(x1); return err; } EXPORT_SYMBOL(xfrm_state_update); int xfrm_state_check_expire(struct xfrm_state *x) { if (!x->curlft.use_time) x->curlft.use_time = get_seconds(); if (x->km.state != XFRM_STATE_VALID) return -EINVAL; if (x->curlft.bytes >= x->lft.hard_byte_limit || x->curlft.packets >= x->lft.hard_packet_limit) { x->km.state = XFRM_STATE_EXPIRED; tasklet_hrtimer_start(&x->mtimer, ktime_set(0,0), HRTIMER_MODE_REL); return -EINVAL; } if (!x->km.dying && (x->curlft.bytes >= x->lft.soft_byte_limit || x->curlft.packets >= x->lft.soft_packet_limit)) { x->km.dying = 1; km_state_expired(x, 0, 0); } return 0; } EXPORT_SYMBOL(xfrm_state_check_expire); struct xfrm_state * xfrm_state_lookup(struct net *net, u32 mark, const xfrm_address_t *daddr, __be32 spi, u8 proto, unsigned short family) { struct xfrm_state *x; spin_lock_bh(&xfrm_state_lock); x = __xfrm_state_lookup(net, mark, daddr, spi, proto, family); spin_unlock_bh(&xfrm_state_lock); return x; } EXPORT_SYMBOL(xfrm_state_lookup); struct xfrm_state * xfrm_state_lookup_byaddr(struct net *net, u32 mark, const xfrm_address_t *daddr, const xfrm_address_t *saddr, u8 proto, unsigned short family) { struct xfrm_state *x; spin_lock_bh(&xfrm_state_lock); x = __xfrm_state_lookup_byaddr(net, mark, daddr, saddr, proto, family); spin_unlock_bh(&xfrm_state_lock); return x; } EXPORT_SYMBOL(xfrm_state_lookup_byaddr); struct xfrm_state * xfrm_find_acq(struct net *net, struct xfrm_mark *mark, u8 mode, u32 reqid, u8 proto, const xfrm_address_t *daddr, const xfrm_address_t *saddr, int create, unsigned short family) { struct xfrm_state *x; spin_lock_bh(&xfrm_state_lock); x = __find_acq_core(net, mark, family, mode, reqid, proto, daddr, saddr, create); spin_unlock_bh(&xfrm_state_lock); return x; } EXPORT_SYMBOL(xfrm_find_acq); #ifdef CONFIG_XFRM_SUB_POLICY int xfrm_tmpl_sort(struct xfrm_tmpl **dst, struct xfrm_tmpl **src, int n, unsigned short family) { int err = 0; struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -EAFNOSUPPORT; spin_lock_bh(&xfrm_state_lock); if (afinfo->tmpl_sort) err = afinfo->tmpl_sort(dst, src, n); spin_unlock_bh(&xfrm_state_lock); xfrm_state_put_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_tmpl_sort); int xfrm_state_sort(struct xfrm_state **dst, struct xfrm_state **src, int n, unsigned short family) { int err = 0; struct xfrm_state_afinfo *afinfo = xfrm_state_get_afinfo(family); if (!afinfo) return -EAFNOSUPPORT; spin_lock_bh(&xfrm_state_lock); if (afinfo->state_sort) err = afinfo->state_sort(dst, src, n); spin_unlock_bh(&xfrm_state_lock); xfrm_state_put_afinfo(afinfo); return err; } EXPORT_SYMBOL(xfrm_state_sort); #endif /* Silly enough, but I'm lazy to build resolution list */ static struct xfrm_state *__xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) { int i; for (i = 0; i <= net->xfrm.state_hmask; i++) { struct hlist_node *entry; struct xfrm_state *x; hlist_for_each_entry(x, entry, net->xfrm.state_bydst+i, bydst) { if (x->km.seq == seq && (mark & x->mark.m) == x->mark.v && x->km.state == XFRM_STATE_ACQ) { xfrm_state_hold(x); return x; } } } return NULL; } struct xfrm_state *xfrm_find_acq_byseq(struct net *net, u32 mark, u32 seq) { struct xfrm_state *x; spin_lock_bh(&xfrm_state_lock); x = __xfrm_find_acq_byseq(net, mark, seq); spin_unlock_bh(&xfrm_state_lock); return x; } EXPORT_SYMBOL(xfrm_find_acq_byseq); u32 xfrm_get_acqseq(void) { u32 res; static atomic_t acqseq; do { res = atomic_inc_return(&acqseq); } while (!res); return res; } EXPORT_SYMBOL(xfrm_get_acqseq); int xfrm_alloc_spi(struct xfrm_state *x, u32 low, u32 high) { struct net *net = xs_net(x); unsigned int h; struct xfrm_state *x0; int err = -ENOENT; __be32 minspi = htonl(low); __be32 maxspi = htonl(high); u32 mark = x->mark.v & x->mark.m; spin_lock_bh(&x->lock); if (x->km.state == XFRM_STATE_DEAD) goto unlock; err = 0; if (x->id.spi) goto unlock; err = -ENOENT; if (minspi == maxspi) { x0 = xfrm_state_lookup(net, mark, &x->id.daddr, minspi, x->id.proto, x->props.family); if (x0) { xfrm_state_put(x0); goto unlock; } x->id.spi = minspi; } else { u32 spi = 0; for (h=0; h<high-low+1; h++) { spi = low + net_random()%(high-low+1); x0 = xfrm_state_lookup(net, mark, &x->id.daddr, htonl(spi), x->id.proto, x->props.family); if (x0 == NULL) { x->id.spi = htonl(spi); break; } xfrm_state_put(x0); } } if (x->id.spi) { spin_lock_bh(&xfrm_state_lock); h = xfrm_spi_hash(net, &x->id.daddr, x->id.spi, x->id.proto, x->props.family); hlist_add_head(&x->byspi, net->xfrm.state_byspi+h); spin_unlock_bh(&xfrm_state_lock); err = 0; } unlock: spin_unlock_bh(&x->lock); return err; } EXPORT_SYMBOL(xfrm_alloc_spi); int xfrm_state_walk(struct net *net, struct xfrm_state_walk *walk, int (*func)(struct xfrm_state *, int, void*), void *data) { struct xfrm_state *state; struct xfrm_state_walk *x; int err = 0; if (walk->seq != 0 && list_empty(&walk->all)) return 0; spin_lock_bh(&xfrm_state_lock); if (list_empty(&walk->all)) x = list_first_entry(&net->xfrm.state_all, struct xfrm_state_walk, all); else x = list_entry(&walk->all, struct xfrm_state_walk, all); list_for_each_entry_from(x, &net->xfrm.state_all, all) { if (x->state == XFRM_STATE_DEAD) continue; state = container_of(x, struct xfrm_state, km); if (!xfrm_id_proto_match(state->id.proto, walk->proto)) continue; err = func(state, walk->seq, data); if (err) { list_move_tail(&walk->all, &x->all); goto out; } walk->seq++; } if (walk->seq == 0) { err = -ENOENT; goto out; } list_del_init(&walk->all); out: spin_unlock_bh(&xfrm_state_lock); return err; } EXPORT_SYMBOL(xfrm_state_walk); void xfrm_state_walk_init(struct xfrm_state_walk *walk, u8 proto) { INIT_LIST_HEAD(&walk->all); walk->proto = proto; walk->state = XFRM_STATE_DEAD; walk->seq = 0; } EXPORT_SYMBOL(xfrm_state_walk_init); void xfrm_state_walk_done(struct xfrm_state_walk *walk) { if (list_empty(&walk->all)) return; spin_lock_bh(&xfrm_state_lock); list_del(&walk->all); spin_unlock_bh(&xfrm_state_lock); } EXPORT_SYMBOL(xfrm_state_walk_done); static void xfrm_replay_timer_handler(unsigned long data) { struct xfrm_state *x = (struct xfrm_state*)data; spin_lock(&x->lock); if (x->km.state == XFRM_STATE_VALID) { if (xfrm_aevent_is_on(xs_net(x))) x->repl->notify(x, XFRM_REPLAY_TIMEOUT); else x->xflags |= XFRM_TIME_DEFER; } spin_unlock(&x->lock); } static LIST_HEAD(xfrm_km_list); static DEFINE_RWLOCK(xfrm_km_lock); void km_policy_notify(struct xfrm_policy *xp, int dir, const struct km_event *c) { struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) if (km->notify_policy) km->notify_policy(xp, dir, c); read_unlock(&xfrm_km_lock); } void km_state_notify(struct xfrm_state *x, const struct km_event *c) { struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) if (km->notify) km->notify(x, c); read_unlock(&xfrm_km_lock); } EXPORT_SYMBOL(km_policy_notify); EXPORT_SYMBOL(km_state_notify); void km_state_expired(struct xfrm_state *x, int hard, u32 pid) { struct net *net = xs_net(x); struct km_event c; c.data.hard = hard; c.pid = pid; c.event = XFRM_MSG_EXPIRE; km_state_notify(x, &c); if (hard) wake_up(&net->xfrm.km_waitq); } EXPORT_SYMBOL(km_state_expired); /* * We send to all registered managers regardless of failure * We are happy with one success */ int km_query(struct xfrm_state *x, struct xfrm_tmpl *t, struct xfrm_policy *pol) { int err = -EINVAL, acqret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { acqret = km->acquire(x, t, pol, XFRM_POLICY_OUT); if (!acqret) err = acqret; } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_query); int km_new_mapping(struct xfrm_state *x, xfrm_address_t *ipaddr, __be16 sport) { int err = -EINVAL; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->new_mapping) err = km->new_mapping(x, ipaddr, sport); if (!err) break; } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_new_mapping); void km_policy_expired(struct xfrm_policy *pol, int dir, int hard, u32 pid) { struct net *net = xp_net(pol); struct km_event c; c.data.hard = hard; c.pid = pid; c.event = XFRM_MSG_POLEXPIRE; km_policy_notify(pol, dir, &c); if (hard) wake_up(&net->xfrm.km_waitq); } EXPORT_SYMBOL(km_policy_expired); #ifdef CONFIG_XFRM_MIGRATE int km_migrate(const struct xfrm_selector *sel, u8 dir, u8 type, const struct xfrm_migrate *m, int num_migrate, const struct xfrm_kmaddress *k) { int err = -EINVAL; int ret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->migrate) { ret = km->migrate(sel, dir, type, m, num_migrate, k); if (!ret) err = ret; } } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_migrate); #endif int km_report(struct net *net, u8 proto, struct xfrm_selector *sel, xfrm_address_t *addr) { int err = -EINVAL; int ret; struct xfrm_mgr *km; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { if (km->report) { ret = km->report(net, proto, sel, addr); if (!ret) err = ret; } } read_unlock(&xfrm_km_lock); return err; } EXPORT_SYMBOL(km_report); int xfrm_user_policy(struct sock *sk, int optname, u8 __user *optval, int optlen) { int err; u8 *data; struct xfrm_mgr *km; struct xfrm_policy *pol = NULL; if (optlen <= 0 || optlen > PAGE_SIZE) return -EMSGSIZE; data = kmalloc(optlen, GFP_KERNEL); if (!data) return -ENOMEM; err = -EFAULT; if (copy_from_user(data, optval, optlen)) goto out; err = -EINVAL; read_lock(&xfrm_km_lock); list_for_each_entry(km, &xfrm_km_list, list) { pol = km->compile_policy(sk, optname, data, optlen, &err); if (err >= 0) break; } read_unlock(&xfrm_km_lock); if (err >= 0) { xfrm_sk_policy_insert(sk, err, pol); xfrm_pol_put(pol); err = 0; } out: kfree(data); return err; } EXPORT_SYMBOL(xfrm_user_policy); int xfrm_register_km(struct xfrm_mgr *km) { write_lock_bh(&xfrm_km_lock); list_add_tail(&km->list, &xfrm_km_list); write_unlock_bh(&xfrm_km_lock); return 0; } EXPORT_SYMBOL(xfrm_register_km); int xfrm_unregister_km(struct xfrm_mgr *km) { write_lock_bh(&xfrm_km_lock); list_del(&km->list); write_unlock_bh(&xfrm_km_lock); return 0; } EXPORT_SYMBOL(xfrm_unregister_km); int xfrm_state_register_afinfo(struct xfrm_state_afinfo *afinfo) { int err = 0; if (unlikely(afinfo == NULL)) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; write_lock_bh(&xfrm_state_afinfo_lock); if (unlikely(xfrm_state_afinfo[afinfo->family] != NULL)) err = -ENOBUFS; else xfrm_state_afinfo[afinfo->family] = afinfo; write_unlock_bh(&xfrm_state_afinfo_lock); return err; } EXPORT_SYMBOL(xfrm_state_register_afinfo); int xfrm_state_unregister_afinfo(struct xfrm_state_afinfo *afinfo) { int err = 0; if (unlikely(afinfo == NULL)) return -EINVAL; if (unlikely(afinfo->family >= NPROTO)) return -EAFNOSUPPORT; write_lock_bh(&xfrm_state_afinfo_lock); if (likely(xfrm_state_afinfo[afinfo->family] != NULL)) { if (unlikely(xfrm_state_afinfo[afinfo->family] != afinfo)) err = -EINVAL; else xfrm_state_afinfo[afinfo->family] = NULL; } write_unlock_bh(&xfrm_state_afinfo_lock); return err; } EXPORT_SYMBOL(xfrm_state_unregister_afinfo); static struct xfrm_state_afinfo *xfrm_state_get_afinfo(unsigned int family) { struct xfrm_state_afinfo *afinfo; if (unlikely(family >= NPROTO)) return NULL; read_lock(&xfrm_state_afinfo_lock); afinfo = xfrm_state_afinfo[family]; if (unlikely(!afinfo)) read_unlock(&xfrm_state_afinfo_lock); return afinfo; } static void xfrm_state_put_afinfo(struct xfrm_state_afinfo *afinfo) __releases(xfrm_state_afinfo_lock) { read_unlock(&xfrm_state_afinfo_lock); } /* Temporarily located here until net/xfrm/xfrm_tunnel.c is created */ void xfrm_state_delete_tunnel(struct xfrm_state *x) { if (x->tunnel) { struct xfrm_state *t = x->tunnel; if (atomic_read(&t->tunnel_users) == 2) xfrm_state_delete(t); atomic_dec(&t->tunnel_users); xfrm_state_put(t); x->tunnel = NULL; } } EXPORT_SYMBOL(xfrm_state_delete_tunnel); int xfrm_state_mtu(struct xfrm_state *x, int mtu) { int res; spin_lock_bh(&x->lock); if (x->km.state == XFRM_STATE_VALID && x->type && x->type->get_mtu) res = x->type->get_mtu(x, mtu); else res = mtu - x->props.header_len; spin_unlock_bh(&x->lock); return res; } int __xfrm_init_state(struct xfrm_state *x, bool init_replay) { struct xfrm_state_afinfo *afinfo; struct xfrm_mode *inner_mode; int family = x->props.family; int err; err = -EAFNOSUPPORT; afinfo = xfrm_state_get_afinfo(family); if (!afinfo) goto error; err = 0; if (afinfo->init_flags) err = afinfo->init_flags(x); xfrm_state_put_afinfo(afinfo); if (err) goto error; err = -EPROTONOSUPPORT; if (x->sel.family != AF_UNSPEC) { inner_mode = xfrm_get_mode(x->props.mode, x->sel.family); if (inner_mode == NULL) goto error; if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL) && family != x->sel.family) { xfrm_put_mode(inner_mode); goto error; } x->inner_mode = inner_mode; } else { struct xfrm_mode *inner_mode_iaf; int iafamily = AF_INET; inner_mode = xfrm_get_mode(x->props.mode, x->props.family); if (inner_mode == NULL) goto error; if (!(inner_mode->flags & XFRM_MODE_FLAG_TUNNEL)) { xfrm_put_mode(inner_mode); goto error; } x->inner_mode = inner_mode; if (x->props.family == AF_INET) iafamily = AF_INET6; inner_mode_iaf = xfrm_get_mode(x->props.mode, iafamily); if (inner_mode_iaf) { if (inner_mode_iaf->flags & XFRM_MODE_FLAG_TUNNEL) x->inner_mode_iaf = inner_mode_iaf; else xfrm_put_mode(inner_mode_iaf); } } x->type = xfrm_get_type(x->id.proto, family); if (x->type == NULL) goto error; err = x->type->init_state(x); if (err) goto error; x->outer_mode = xfrm_get_mode(x->props.mode, family); if (x->outer_mode == NULL) goto error; if (init_replay) { err = xfrm_init_replay(x); if (err) goto error; } x->km.state = XFRM_STATE_VALID; error: return err; } EXPORT_SYMBOL(__xfrm_init_state); int xfrm_init_state(struct xfrm_state *x) { return __xfrm_init_state(x, true); } EXPORT_SYMBOL(xfrm_init_state); int __net_init xfrm_state_init(struct net *net) { unsigned int sz; INIT_LIST_HEAD(&net->xfrm.state_all); sz = sizeof(struct hlist_head) * 8; net->xfrm.state_bydst = xfrm_hash_alloc(sz); if (!net->xfrm.state_bydst) goto out_bydst; net->xfrm.state_bysrc = xfrm_hash_alloc(sz); if (!net->xfrm.state_bysrc) goto out_bysrc; net->xfrm.state_byspi = xfrm_hash_alloc(sz); if (!net->xfrm.state_byspi) goto out_byspi; net->xfrm.state_hmask = ((sz / sizeof(struct hlist_head)) - 1); net->xfrm.state_num = 0; INIT_WORK(&net->xfrm.state_hash_work, xfrm_hash_resize); INIT_HLIST_HEAD(&net->xfrm.state_gc_list); INIT_WORK(&net->xfrm.state_gc_work, xfrm_state_gc_task); init_waitqueue_head(&net->xfrm.km_waitq); return 0; out_byspi: xfrm_hash_free(net->xfrm.state_bysrc, sz); out_bysrc: xfrm_hash_free(net->xfrm.state_bydst, sz); out_bydst: return -ENOMEM; } void xfrm_state_fini(struct net *net) { struct xfrm_audit audit_info; unsigned int sz; flush_work(&net->xfrm.state_hash_work); audit_info.loginuid = -1; audit_info.sessionid = -1; audit_info.secid = 0; xfrm_state_flush(net, IPSEC_PROTO_ANY, &audit_info); flush_work(&net->xfrm.state_gc_work); WARN_ON(!list_empty(&net->xfrm.state_all)); sz = (net->xfrm.state_hmask + 1) * sizeof(struct hlist_head); WARN_ON(!hlist_empty(net->xfrm.state_byspi)); xfrm_hash_free(net->xfrm.state_byspi, sz); WARN_ON(!hlist_empty(net->xfrm.state_bysrc)); xfrm_hash_free(net->xfrm.state_bysrc, sz); WARN_ON(!hlist_empty(net->xfrm.state_bydst)); xfrm_hash_free(net->xfrm.state_bydst, sz); } #ifdef CONFIG_AUDITSYSCALL static void xfrm_audit_helper_sainfo(struct xfrm_state *x, struct audit_buffer *audit_buf) { struct xfrm_sec_ctx *ctx = x->security; u32 spi = ntohl(x->id.spi); if (ctx) audit_log_format(audit_buf, " sec_alg=%u sec_doi=%u sec_obj=%s", ctx->ctx_alg, ctx->ctx_doi, ctx->ctx_str); switch(x->props.family) { case AF_INET: audit_log_format(audit_buf, " src=%pI4 dst=%pI4", &x->props.saddr.a4, &x->id.daddr.a4); break; case AF_INET6: audit_log_format(audit_buf, " src=%pI6 dst=%pI6", x->props.saddr.a6, x->id.daddr.a6); break; } audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); } static void xfrm_audit_helper_pktinfo(struct sk_buff *skb, u16 family, struct audit_buffer *audit_buf) { const struct iphdr *iph4; const struct ipv6hdr *iph6; switch (family) { case AF_INET: iph4 = ip_hdr(skb); audit_log_format(audit_buf, " src=%pI4 dst=%pI4", &iph4->saddr, &iph4->daddr); break; case AF_INET6: iph6 = ipv6_hdr(skb); audit_log_format(audit_buf, " src=%pI6 dst=%pI6 flowlbl=0x%x%02x%02x", &iph6->saddr,&iph6->daddr, iph6->flow_lbl[0] & 0x0f, iph6->flow_lbl[1], iph6->flow_lbl[2]); break; } } void xfrm_audit_state_add(struct xfrm_state *x, int result, uid_t auid, u32 sessionid, u32 secid) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SAD-add"); if (audit_buf == NULL) return; xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); xfrm_audit_helper_sainfo(x, audit_buf); audit_log_format(audit_buf, " res=%u", result); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_add); void xfrm_audit_state_delete(struct xfrm_state *x, int result, uid_t auid, u32 sessionid, u32 secid) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SAD-delete"); if (audit_buf == NULL) return; xfrm_audit_helper_usrinfo(auid, sessionid, secid, audit_buf); xfrm_audit_helper_sainfo(x, audit_buf); audit_log_format(audit_buf, " res=%u", result); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_delete); void xfrm_audit_state_replay_overflow(struct xfrm_state *x, struct sk_buff *skb) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-replay-overflow"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); /* don't record the sequence number because it's inherent in this kind * of audit message */ spi = ntohl(x->id.spi); audit_log_format(audit_buf, " spi=%u(0x%x)", spi, spi); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_replay_overflow); void xfrm_audit_state_replay(struct xfrm_state *x, struct sk_buff *skb, __be32 net_seq) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-replayed-pkt"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); spi = ntohl(x->id.spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_replay); void xfrm_audit_state_notfound_simple(struct sk_buff *skb, u16 family) { struct audit_buffer *audit_buf; audit_buf = xfrm_audit_start("SA-notfound"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, family, audit_buf); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound_simple); void xfrm_audit_state_notfound(struct sk_buff *skb, u16 family, __be32 net_spi, __be32 net_seq) { struct audit_buffer *audit_buf; u32 spi; audit_buf = xfrm_audit_start("SA-notfound"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, family, audit_buf); spi = ntohl(net_spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_notfound); void xfrm_audit_state_icvfail(struct xfrm_state *x, struct sk_buff *skb, u8 proto) { struct audit_buffer *audit_buf; __be32 net_spi; __be32 net_seq; audit_buf = xfrm_audit_start("SA-icv-failure"); if (audit_buf == NULL) return; xfrm_audit_helper_pktinfo(skb, x->props.family, audit_buf); if (xfrm_parse_spi(skb, proto, &net_spi, &net_seq) == 0) { u32 spi = ntohl(net_spi); audit_log_format(audit_buf, " spi=%u(0x%x) seqno=%u", spi, spi, ntohl(net_seq)); } audit_log_end(audit_buf); } EXPORT_SYMBOL_GPL(xfrm_audit_state_icvfail); #endif /* CONFIG_AUDITSYSCALL */


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