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

diff options

Diffstat (limited to 'drivers/ata/libahci.c')

-rw-r--r--

1 files changed, 4 insertions, 12 deletions


diff --git a/drivers/ata/libahci.c b/drivers/ata/libahci.c index 68dc6785472f..8eea309ea212 100644 --- a/drivers/ata/libahci.c +++ b/drivers/ata/libahci.c
@@ -121,7 +121,7 @@ static DEVICE_ATTR(ahci_port_cmd, S_IRUGO, ahci_show_port_cmd, NULL);
121	static DEVICE_ATTR(em_buffer, S_IWUSR \| S_IRUGO,	121	static DEVICE_ATTR(em_buffer, S_IWUSR \| S_IRUGO,
122	ahci_read_em_buffer, ahci_store_em_buffer);	122	ahci_read_em_buffer, ahci_store_em_buffer);
123		123
124	static struct device_attribute *ahci_shost_attrs[] = {	124	struct device_attribute *ahci_shost_attrs[] = {
125	&dev_attr_link_power_management_policy,	125	&dev_attr_link_power_management_policy,
126	&dev_attr_em_message_type,	126	&dev_attr_em_message_type,
127	&dev_attr_em_message,	127	&dev_attr_em_message,
@@ -132,22 +132,14 @@ static struct device_attribute *ahci_shost_attrs[] = {
132	&dev_attr_em_buffer,	132	&dev_attr_em_buffer,
133	NULL	133	NULL
134	};	134	};
		135	EXPORT_SYMBOL_GPL(ahci_shost_attrs);
135		136
136	static struct device_attribute *ahci_sdev_attrs[] = {	137	struct device_attribute *ahci_sdev_attrs[] = {
137	&dev_attr_sw_activity,	138	&dev_attr_sw_activity,
138	&dev_attr_unload_heads,	139	&dev_attr_unload_heads,
139	NULL	140	NULL
140	};	141	};
141		142	EXPORT_SYMBOL_GPL(ahci_sdev_attrs);
142	struct scsi_host_template ahci_sht = {
143	ATA_NCQ_SHT("ahci"),
144	.can_queue = AHCI_MAX_CMDS - 1,
145	.sg_tablesize = AHCI_MAX_SG,
146	.dma_boundary = AHCI_DMA_BOUNDARY,
147	.shost_attrs = ahci_shost_attrs,
148	.sdev_attrs = ahci_sdev_attrs,
149	};
150	EXPORT_SYMBOL_GPL(ahci_sht);
151		143
152	struct ata_port_operations ahci_ops = {	144	struct ata_port_operations ahci_ops = {
153	.inherits = &sata_pmp_port_ops,	145	.inherits = &sata_pmp_port_ops,

/* * net/core/fib_rules.c Generic Routing Rules * * 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, version 2. * * Authors: Thomas Graf <tgraf@suug.ch> */ #include <linux/types.h> #include <linux/kernel.h> #include <linux/list.h> #include <net/net_namespace.h> #include <net/sock.h> #include <net/fib_rules.h> int fib_default_rule_add(struct fib_rules_ops *ops, u32 pref, u32 table, u32 flags) { struct fib_rule *r; r = kzalloc(ops->rule_size, GFP_KERNEL); if (r == NULL) return -ENOMEM; atomic_set(&r->refcnt, 1); r->action = FR_ACT_TO_TBL; r->pref = pref; r->table = table; r->flags = flags; r->fr_net = hold_net(ops->fro_net); /* The lock is not required here, the list in unreacheable * at the moment this function is called */ list_add_tail(&r->list, &ops->rules_list); return 0; } EXPORT_SYMBOL(fib_default_rule_add); static void notify_rule_change(int event, struct fib_rule *rule, struct fib_rules_ops *ops, struct nlmsghdr *nlh, u32 pid); static struct fib_rules_ops *lookup_rules_ops(struct net *net, int family) { struct fib_rules_ops *ops; rcu_read_lock(); list_for_each_entry_rcu(ops, &net->rules_ops, list) { if (ops->family == family) { if (!try_module_get(ops->owner)) ops = NULL; rcu_read_unlock(); return ops; } } rcu_read_unlock(); return NULL; } static void rules_ops_put(struct fib_rules_ops *ops) { if (ops) module_put(ops->owner); } static void flush_route_cache(struct fib_rules_ops *ops) { if (ops->flush_cache) ops->flush_cache(ops); } int fib_rules_register(struct fib_rules_ops *ops) { int err = -EEXIST; struct fib_rules_ops *o; struct net *net; net = ops->fro_net; if (ops->rule_size < sizeof(struct fib_rule)) return -EINVAL; if (ops->match == NULL || ops->configure == NULL || ops->compare == NULL || ops->fill == NULL || ops->action == NULL) return -EINVAL; spin_lock(&net->rules_mod_lock); list_for_each_entry(o, &net->rules_ops, list) if (ops->family == o->family) goto errout; hold_net(net); list_add_tail_rcu(&ops->list, &net->rules_ops); err = 0; errout: spin_unlock(&net->rules_mod_lock); return err; } EXPORT_SYMBOL_GPL(fib_rules_register); void fib_rules_cleanup_ops(struct fib_rules_ops *ops) { struct fib_rule *rule, *tmp; list_for_each_entry_safe(rule, tmp, &ops->rules_list, list) { list_del_rcu(&rule->list); fib_rule_put(rule); } } EXPORT_SYMBOL_GPL(fib_rules_cleanup_ops); void fib_rules_unregister(struct fib_rules_ops *ops) { struct net *net = ops->fro_net; spin_lock(&net->rules_mod_lock); list_del_rcu(&ops->list); fib_rules_cleanup_ops(ops); spin_unlock(&net->rules_mod_lock); synchronize_rcu(); release_net(net); } EXPORT_SYMBOL_GPL(fib_rules_unregister); static int fib_rule_match(struct fib_rule *rule, struct fib_rules_ops *ops, struct flowi *fl, int flags) { int ret = 0; if (rule->ifindex && (rule->ifindex != fl->iif)) goto out; if ((rule->mark ^ fl->mark) & rule->mark_mask) goto out; ret = ops->match(rule, fl, flags); out: return (rule->flags & FIB_RULE_INVERT) ? !ret : ret; } int fib_rules_lookup(struct fib_rules_ops *ops, struct flowi *fl, int flags, struct fib_lookup_arg *arg) { struct fib_rule *rule; int err; rcu_read_lock(); list_for_each_entry_rcu(rule, &ops->rules_list, list) { jumped: if (!fib_rule_match(rule, ops, fl, flags)) continue; if (rule->action == FR_ACT_GOTO) { struct fib_rule *target; target = rcu_dereference(rule->ctarget); if (target == NULL) { continue; } else { rule = target; goto jumped; } } else if (rule->action == FR_ACT_NOP) continue; else err = ops->action(rule, fl, flags, arg); if (err != -EAGAIN) { fib_rule_get(rule); arg->rule = rule; goto out; } } err = -ESRCH; out: rcu_read_unlock(); return err; } EXPORT_SYMBOL_GPL(fib_rules_lookup); static int validate_rulemsg(struct fib_rule_hdr *frh, struct nlattr **tb, struct fib_rules_ops *ops) { int err = -EINVAL; if (frh->src_len) if (tb[FRA_SRC] == NULL || frh->src_len > (ops->addr_size * 8) || nla_len(tb[FRA_SRC]) != ops->addr_size) goto errout; if (frh->dst_len) if (tb[FRA_DST] == NULL || frh->dst_len > (ops->addr_size * 8) || nla_len(tb[FRA_DST]) != ops->addr_size) goto errout; err = 0; errout: return err; } static int fib_nl_newrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) { struct net *net = sock_net(skb->sk); struct fib_rule_hdr *frh = nlmsg_data(nlh); struct fib_rules_ops *ops = NULL; struct fib_rule *rule, *r, *last = NULL; struct nlattr *tb[FRA_MAX+1]; int err = -EINVAL, unresolved = 0; if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) goto errout; ops = lookup_rules_ops(net, frh->family); if (ops == NULL) { err = -EAFNOSUPPORT; goto errout; } err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy); if (err < 0) goto errout; err = validate_rulemsg(frh, tb, ops); if (err < 0) goto errout; rule = kzalloc(ops->rule_size, GFP_KERNEL); if (rule == NULL) { err = -ENOMEM; goto errout; } rule->fr_net = hold_net(net); if (tb[FRA_PRIORITY]) rule->pref = nla_get_u32(tb[FRA_PRIORITY]); if (tb[FRA_IFNAME]) { struct net_device *dev; rule->ifindex = -1; nla_strlcpy(rule->ifname, tb[FRA_IFNAME], IFNAMSIZ); dev = __dev_get_by_name(net, rule->ifname); if (dev) rule->ifindex = dev->ifindex; } if (tb[FRA_FWMARK]) { rule->mark = nla_get_u32(tb[FRA_FWMARK]); if (rule->mark) /* compatibility: if the mark value is non-zero all bits * are compared unless a mask is explicitly specified. */ rule->mark_mask = 0xFFFFFFFF; } if (tb[FRA_FWMASK]) rule->mark_mask = nla_get_u32(tb[FRA_FWMASK]); rule->action = frh->action; rule->flags = frh->flags; rule->table = frh_get_table(frh, tb); if (!rule->pref && ops->default_pref) rule->pref = ops->default_pref(ops); err = -EINVAL; if (tb[FRA_GOTO]) { if (rule->action != FR_ACT_GOTO) goto errout_free; rule->target = nla_get_u32(tb[FRA_GOTO]); /* Backward jumps are prohibited to avoid endless loops */ if (rule->target <= rule->pref) goto errout_free; list_for_each_entry(r, &ops->rules_list, list) { if (r->pref == rule->target) { rule->ctarget = r; break; } } if (rule->ctarget == NULL) unresolved = 1; } else if (rule->action == FR_ACT_GOTO) goto errout_free; err = ops->configure(rule, skb, nlh, frh, tb); if (err < 0) goto errout_free; list_for_each_entry(r, &ops->rules_list, list) { if (r->pref > rule->pref) break; last = r; } fib_rule_get(rule); if (ops->unresolved_rules) { /* * There are unresolved goto rules in the list, check if * any of them are pointing to this new rule. */ list_for_each_entry(r, &ops->rules_list, list) { if (r->action == FR_ACT_GOTO && r->target == rule->pref) { BUG_ON(r->ctarget != NULL); rcu_assign_pointer(r->ctarget, rule); if (--ops->unresolved_rules == 0) break; } } } if (rule->action == FR_ACT_GOTO) ops->nr_goto_rules++; if (unresolved) ops->unresolved_rules++; if (last) list_add_rcu(&rule->list, &last->list); else list_add_rcu(&rule->list, &ops->rules_list); notify_rule_change(RTM_NEWRULE, rule, ops, nlh, NETLINK_CB(skb).pid); flush_route_cache(ops); rules_ops_put(ops); return 0; errout_free: release_net(rule->fr_net); kfree(rule); errout: rules_ops_put(ops); return err; } static int fib_nl_delrule(struct sk_buff *skb, struct nlmsghdr* nlh, void *arg) { struct net *net = sock_net(skb->sk); struct fib_rule_hdr *frh = nlmsg_data(nlh); struct fib_rules_ops *ops = NULL; struct fib_rule *rule, *tmp; struct nlattr *tb[FRA_MAX+1]; int err = -EINVAL; if (nlh->nlmsg_len < nlmsg_msg_size(sizeof(*frh))) goto errout; ops = lookup_rules_ops(net, frh->family); if (ops == NULL) { err = -EAFNOSUPPORT; goto errout; } err = nlmsg_parse(nlh, sizeof(*frh), tb, FRA_MAX, ops->policy); if (err < 0) goto errout; err = validate_rulemsg(frh, tb, ops); if (err < 0) goto errout; list_for_each_entry(rule, &ops->rules_list, list) { if (frh->action && (frh->action != rule->action)) continue; if (frh->table && (frh_get_table(frh, tb) != rule->table)) continue; if (tb[FRA_PRIORITY] && (rule->pref != nla_get_u32(tb[FRA_PRIORITY]))) continue; if (tb[FRA_IFNAME] && nla_strcmp(tb[FRA_IFNAME], rule->ifname)) continue; if (tb[FRA_FWMARK] && (rule->mark != nla_get_u32(tb[FRA_FWMARK]))) continue; if (tb[FRA_FWMASK] && (rule->mark_mask != nla_get_u32(tb[FRA_FWMASK]))) continue; if (!ops->compare(rule, frh, tb)) continue; if (rule->flags & FIB_RULE_PERMANENT) { err = -EPERM; goto errout; } list_del_rcu(&rule->list); if (rule->action == FR_ACT_GOTO) ops->nr_goto_rules--; /* * Check if this rule is a target to any of them. If so, * disable them. As this operation is eventually very * expensive, it is only performed if goto rules have * actually been added. */ if (ops->nr_goto_rules > 0) { list_for_each_entry(tmp, &ops->rules_list, list) { if (tmp->ctarget == rule) { rcu_assign_pointer(tmp->ctarget, NULL); ops->unresolved_rules++; } } } synchronize_rcu(); notify_rule_change(RTM_DELRULE, rule, ops, nlh, NETLINK_CB(skb).pid); fib_rule_put(rule); flush_route_cache(ops); rules_ops_put(ops); return 0; } err = -ENOENT; errout: rules_ops_put(ops); return err; } static inline size_t fib_rule_nlmsg_size(struct fib_rules_ops *ops, struct fib_rule *rule) { size_t payload = NLMSG_ALIGN(sizeof(struct fib_rule_hdr)) + nla_total_size(IFNAMSIZ) /* FRA_IFNAME */ + nla_total_size(4) /* FRA_PRIORITY */ + nla_total_size(4) /* FRA_TABLE */ + nla_total_size(4) /* FRA_FWMARK */ + nla_total_size(4); /* FRA_FWMASK */ if (ops->nlmsg_payload) payload += ops->nlmsg_payload(rule); return payload; } static int fib_nl_fill_rule(struct sk_buff *skb, struct fib_rule *rule, u32 pid, u32 seq, int type, int flags, struct fib_rules_ops *ops) { struct nlmsghdr *nlh; struct fib_rule_hdr *frh; nlh = nlmsg_put(skb, pid, seq, type, sizeof(*frh), flags); if (nlh == NULL) return -EMSGSIZE; frh = nlmsg_data(nlh); frh->table = rule->table; NLA_PUT_U32(skb, FRA_TABLE, rule->table); frh->res1 = 0; frh->res2 = 0; frh->action = rule->action; frh->flags = rule->flags; if (rule->action == FR_ACT_GOTO && rule->ctarget == NULL) frh->flags |= FIB_RULE_UNRESOLVED; if (rule->ifname[0]) { NLA_PUT_STRING(skb, FRA_IFNAME, rule->ifname); if (rule->ifindex == -1) frh->flags |= FIB_RULE_DEV_DETACHED; } if (rule->pref) NLA_PUT_U32(skb, FRA_PRIORITY, rule->pref); if (rule->mark) NLA_PUT_U32(skb, FRA_FWMARK, rule->mark); if (rule->mark_mask || rule->mark) NLA_PUT_U32(skb, FRA_FWMASK, rule->mark_mask); if (rule->target) NLA_PUT_U32(skb, FRA_GOTO, rule->target); if (ops->fill(rule, skb, nlh, frh) < 0) goto nla_put_failure; return nlmsg_end(skb, nlh); nla_put_failure: nlmsg_cancel(skb, nlh); return -EMSGSIZE; } static int dump_rules(struct sk_buff *skb, struct netlink_callback *cb, struct fib_rules_ops *ops) { int idx = 0; struct fib_rule *rule; list_for_each_entry(rule, &ops->rules_list, list) { if (idx < cb->args[1]) goto skip; if (fib_nl_fill_rule(skb, rule, NETLINK_CB(cb->skb).pid, cb->nlh->nlmsg_seq, RTM_NEWRULE, NLM_F_MULTI, ops) < 0) break; skip: idx++; } cb->args[1] = idx; rules_ops_put(ops); return skb->len; } static int fib_nl_dumprule(struct sk_buff *skb, struct netlink_callback *cb) { struct net *net = sock_net(skb->sk); struct fib_rules_ops *ops; int idx = 0, family; family = rtnl_msg_family(cb->nlh); if (family != AF_UNSPEC) { /* Protocol specific dump request */ ops = lookup_rules_ops(net, family); if (ops == NULL) return -EAFNOSUPPORT; return dump_rules(skb, cb, ops); } rcu_read_lock(); list_for_each_entry_rcu(ops, &net->rules_ops, list) { if (idx < cb->args[0] || !try_module_get(ops->owner)) goto skip; if (dump_rules(skb, cb, ops) < 0) break; cb->args[1] = 0; skip: idx++; } rcu_read_unlock(); cb->args[0] = idx; return skb->len; } static void notify_rule_change(int event, struct fib_rule *rule, struct fib_rules_ops *ops, struct nlmsghdr *nlh, u32 pid) { struct net *net; struct sk_buff *skb; int err = -ENOBUFS; net = ops->fro_net; skb = nlmsg_new(fib_rule_nlmsg_size(ops, rule), GFP_KERNEL); if (skb == NULL) goto errout; err = fib_nl_fill_rule(skb, rule, pid, nlh->nlmsg_seq, event, 0, ops); if (err < 0) { /* -EMSGSIZE implies BUG in fib_rule_nlmsg_size() */ WARN_ON(err == -EMSGSIZE); kfree_skb(skb); goto errout; } rtnl_notify(skb, net, pid, ops->nlgroup, nlh, GFP_KERNEL); return; errout: if (err < 0) rtnl_set_sk_err(net, ops->nlgroup, err); } static void attach_rules(struct list_head *rules, struct net_device *dev) { struct fib_rule *rule; list_for_each_entry(rule, rules, list) { if (rule->ifindex == -1 && strcmp(dev->name, rule->ifname) == 0) rule->ifindex = dev->ifindex; } } static void detach_rules(struct list_head *rules, struct net_device *dev) { struct fib_rule *rule; list_for_each_entry(rule, rules, list) if (rule->ifindex == dev->ifindex) rule->ifindex = -1; } static int fib_rules_event(struct notifier_block *this, unsigned long event, void *ptr) { struct net_device *dev = ptr; struct net *net = dev_net(dev); struct fib_rules_ops *ops; ASSERT_RTNL(); rcu_read_lock(); switch (event) { case NETDEV_REGISTER: list_for_each_entry(ops, &net->rules_ops, list) attach_rules(&ops->rules_list, dev); break; case NETDEV_UNREGISTER: list_for_each_entry(ops, &net->rules_ops, list) detach_rules(&ops->rules_list, dev); break; } rcu_read_unlock(); return NOTIFY_DONE; } static struct notifier_block fib_rules_notifier = { .notifier_call = fib_rules_event, }; static int fib_rules_net_init(struct net *net) { INIT_LIST_HEAD(&net->rules_ops); spin_lock_init(&net->rules_mod_lock); return 0; } static struct pernet_operations fib_rules_net_ops = { .init = fib_rules_net_init, }; static int __init fib_rules_init(void) { int err; rtnl_register(PF_UNSPEC, RTM_NEWRULE, fib_nl_newrule, NULL); rtnl_register(PF_UNSPEC, RTM_DELRULE, fib_nl_delrule, NULL); rtnl_register(PF_UNSPEC, RTM_GETRULE, NULL, fib_nl_dumprule); err = register_pernet_subsys(&fib_rules_net_ops); if (err < 0) goto fail; err = register_netdevice_notifier(&fib_rules_notifier); if (err < 0) goto fail_unregister; return 0; fail_unregister: unregister_pernet_subsys(&fib_rules_net_ops); fail: rtnl_unregister(PF_UNSPEC, RTM_NEWRULE); rtnl_unregister(PF_UNSPEC, RTM_DELRULE); rtnl_unregister(PF_UNSPEC, RTM_GETRULE); return err; } subsys_initcall(fib_rules_init);


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