Revision 2b42be5eb24564227b15e66f54f088e5a26549c7 authored by Jan Kara on 11 March 2019, 14:27:02 UTC, committed by Jan Kara on 18 March 2019, 15:30:02 UTC
Make udf_truncate_extents() properly propagate errors to its callers and let udf_setsize() handle the error properly as well. This lets userspace know in case there's some error when truncating blocks. Signed-off-by: Jan Kara <jack@suse.cz>
1 parent d3ca465
nft_chain_filter.c
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <net/net_namespace.h>
#include <net/netfilter/nf_tables.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_bridge.h>
#include <linux/netfilter_arp.h>
#include <net/netfilter/nf_tables_ipv4.h>
#include <net/netfilter/nf_tables_ipv6.h>
#ifdef CONFIG_NF_TABLES_IPV4
static unsigned int nft_do_chain_ipv4(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
nft_set_pktinfo_ipv4(&pkt, skb);
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_ipv4 = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_IPV4,
.hook_mask = (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_LOCAL_OUT) |
(1 << NF_INET_FORWARD) |
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_POST_ROUTING),
.hooks = {
[NF_INET_LOCAL_IN] = nft_do_chain_ipv4,
[NF_INET_LOCAL_OUT] = nft_do_chain_ipv4,
[NF_INET_FORWARD] = nft_do_chain_ipv4,
[NF_INET_PRE_ROUTING] = nft_do_chain_ipv4,
[NF_INET_POST_ROUTING] = nft_do_chain_ipv4,
},
};
static void nft_chain_filter_ipv4_init(void)
{
nft_register_chain_type(&nft_chain_filter_ipv4);
}
static void nft_chain_filter_ipv4_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_ipv4);
}
#else
static inline void nft_chain_filter_ipv4_init(void) {}
static inline void nft_chain_filter_ipv4_fini(void) {}
#endif /* CONFIG_NF_TABLES_IPV4 */
#ifdef CONFIG_NF_TABLES_ARP
static unsigned int nft_do_chain_arp(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
nft_set_pktinfo_unspec(&pkt, skb);
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_arp = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_ARP,
.owner = THIS_MODULE,
.hook_mask = (1 << NF_ARP_IN) |
(1 << NF_ARP_OUT),
.hooks = {
[NF_ARP_IN] = nft_do_chain_arp,
[NF_ARP_OUT] = nft_do_chain_arp,
},
};
static void nft_chain_filter_arp_init(void)
{
nft_register_chain_type(&nft_chain_filter_arp);
}
static void nft_chain_filter_arp_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_arp);
}
#else
static inline void nft_chain_filter_arp_init(void) {}
static inline void nft_chain_filter_arp_fini(void) {}
#endif /* CONFIG_NF_TABLES_ARP */
#ifdef CONFIG_NF_TABLES_IPV6
static unsigned int nft_do_chain_ipv6(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
nft_set_pktinfo_ipv6(&pkt, skb);
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_ipv6 = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_IPV6,
.hook_mask = (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_LOCAL_OUT) |
(1 << NF_INET_FORWARD) |
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_POST_ROUTING),
.hooks = {
[NF_INET_LOCAL_IN] = nft_do_chain_ipv6,
[NF_INET_LOCAL_OUT] = nft_do_chain_ipv6,
[NF_INET_FORWARD] = nft_do_chain_ipv6,
[NF_INET_PRE_ROUTING] = nft_do_chain_ipv6,
[NF_INET_POST_ROUTING] = nft_do_chain_ipv6,
},
};
static void nft_chain_filter_ipv6_init(void)
{
nft_register_chain_type(&nft_chain_filter_ipv6);
}
static void nft_chain_filter_ipv6_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_ipv6);
}
#else
static inline void nft_chain_filter_ipv6_init(void) {}
static inline void nft_chain_filter_ipv6_fini(void) {}
#endif /* CONFIG_NF_TABLES_IPV6 */
#ifdef CONFIG_NF_TABLES_INET
static unsigned int nft_do_chain_inet(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
switch (state->pf) {
case NFPROTO_IPV4:
nft_set_pktinfo_ipv4(&pkt, skb);
break;
case NFPROTO_IPV6:
nft_set_pktinfo_ipv6(&pkt, skb);
break;
default:
break;
}
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_inet = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_INET,
.hook_mask = (1 << NF_INET_LOCAL_IN) |
(1 << NF_INET_LOCAL_OUT) |
(1 << NF_INET_FORWARD) |
(1 << NF_INET_PRE_ROUTING) |
(1 << NF_INET_POST_ROUTING),
.hooks = {
[NF_INET_LOCAL_IN] = nft_do_chain_inet,
[NF_INET_LOCAL_OUT] = nft_do_chain_inet,
[NF_INET_FORWARD] = nft_do_chain_inet,
[NF_INET_PRE_ROUTING] = nft_do_chain_inet,
[NF_INET_POST_ROUTING] = nft_do_chain_inet,
},
};
static void nft_chain_filter_inet_init(void)
{
nft_register_chain_type(&nft_chain_filter_inet);
}
static void nft_chain_filter_inet_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_inet);
}
#else
static inline void nft_chain_filter_inet_init(void) {}
static inline void nft_chain_filter_inet_fini(void) {}
#endif /* CONFIG_NF_TABLES_IPV6 */
#ifdef CONFIG_NF_TABLES_BRIDGE
static unsigned int
nft_do_chain_bridge(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
switch (eth_hdr(skb)->h_proto) {
case htons(ETH_P_IP):
nft_set_pktinfo_ipv4_validate(&pkt, skb);
break;
case htons(ETH_P_IPV6):
nft_set_pktinfo_ipv6_validate(&pkt, skb);
break;
default:
nft_set_pktinfo_unspec(&pkt, skb);
break;
}
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_bridge = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_BRIDGE,
.hook_mask = (1 << NF_BR_PRE_ROUTING) |
(1 << NF_BR_LOCAL_IN) |
(1 << NF_BR_FORWARD) |
(1 << NF_BR_LOCAL_OUT) |
(1 << NF_BR_POST_ROUTING),
.hooks = {
[NF_BR_PRE_ROUTING] = nft_do_chain_bridge,
[NF_BR_LOCAL_IN] = nft_do_chain_bridge,
[NF_BR_FORWARD] = nft_do_chain_bridge,
[NF_BR_LOCAL_OUT] = nft_do_chain_bridge,
[NF_BR_POST_ROUTING] = nft_do_chain_bridge,
},
};
static void nft_chain_filter_bridge_init(void)
{
nft_register_chain_type(&nft_chain_filter_bridge);
}
static void nft_chain_filter_bridge_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_bridge);
}
#else
static inline void nft_chain_filter_bridge_init(void) {}
static inline void nft_chain_filter_bridge_fini(void) {}
#endif /* CONFIG_NF_TABLES_BRIDGE */
#ifdef CONFIG_NF_TABLES_NETDEV
static unsigned int nft_do_chain_netdev(void *priv, struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nft_pktinfo pkt;
nft_set_pktinfo(&pkt, skb, state);
switch (skb->protocol) {
case htons(ETH_P_IP):
nft_set_pktinfo_ipv4_validate(&pkt, skb);
break;
case htons(ETH_P_IPV6):
nft_set_pktinfo_ipv6_validate(&pkt, skb);
break;
default:
nft_set_pktinfo_unspec(&pkt, skb);
break;
}
return nft_do_chain(&pkt, priv);
}
static const struct nft_chain_type nft_chain_filter_netdev = {
.name = "filter",
.type = NFT_CHAIN_T_DEFAULT,
.family = NFPROTO_NETDEV,
.hook_mask = (1 << NF_NETDEV_INGRESS),
.hooks = {
[NF_NETDEV_INGRESS] = nft_do_chain_netdev,
},
};
static void nft_netdev_event(unsigned long event, struct net_device *dev,
struct nft_ctx *ctx)
{
struct nft_base_chain *basechain = nft_base_chain(ctx->chain);
switch (event) {
case NETDEV_UNREGISTER:
if (strcmp(basechain->dev_name, dev->name) != 0)
return;
/* UNREGISTER events are also happpening on netns exit.
*
* Altough nf_tables core releases all tables/chains, only
* this event handler provides guarantee that
* basechain.ops->dev is still accessible, so we cannot
* skip exiting net namespaces.
*/
__nft_release_basechain(ctx);
break;
case NETDEV_CHANGENAME:
if (dev->ifindex != basechain->ops.dev->ifindex)
return;
strncpy(basechain->dev_name, dev->name, IFNAMSIZ);
break;
}
}
static int nf_tables_netdev_event(struct notifier_block *this,
unsigned long event, void *ptr)
{
struct net_device *dev = netdev_notifier_info_to_dev(ptr);
struct nft_table *table;
struct nft_chain *chain, *nr;
struct nft_ctx ctx = {
.net = dev_net(dev),
};
if (event != NETDEV_UNREGISTER &&
event != NETDEV_CHANGENAME)
return NOTIFY_DONE;
mutex_lock(&ctx.net->nft.commit_mutex);
list_for_each_entry(table, &ctx.net->nft.tables, list) {
if (table->family != NFPROTO_NETDEV)
continue;
ctx.family = table->family;
ctx.table = table;
list_for_each_entry_safe(chain, nr, &table->chains, list) {
if (!nft_is_base_chain(chain))
continue;
ctx.chain = chain;
nft_netdev_event(event, dev, &ctx);
}
}
mutex_unlock(&ctx.net->nft.commit_mutex);
return NOTIFY_DONE;
}
static struct notifier_block nf_tables_netdev_notifier = {
.notifier_call = nf_tables_netdev_event,
};
static int nft_chain_filter_netdev_init(void)
{
int err;
nft_register_chain_type(&nft_chain_filter_netdev);
err = register_netdevice_notifier(&nf_tables_netdev_notifier);
if (err)
goto err_register_netdevice_notifier;
return 0;
err_register_netdevice_notifier:
nft_unregister_chain_type(&nft_chain_filter_netdev);
return err;
}
static void nft_chain_filter_netdev_fini(void)
{
nft_unregister_chain_type(&nft_chain_filter_netdev);
unregister_netdevice_notifier(&nf_tables_netdev_notifier);
}
#else
static inline int nft_chain_filter_netdev_init(void) { return 0; }
static inline void nft_chain_filter_netdev_fini(void) {}
#endif /* CONFIG_NF_TABLES_NETDEV */
int __init nft_chain_filter_init(void)
{
int err;
err = nft_chain_filter_netdev_init();
if (err < 0)
return err;
nft_chain_filter_ipv4_init();
nft_chain_filter_ipv6_init();
nft_chain_filter_arp_init();
nft_chain_filter_inet_init();
nft_chain_filter_bridge_init();
return 0;
}
void nft_chain_filter_fini(void)
{
nft_chain_filter_bridge_fini();
nft_chain_filter_inet_fini();
nft_chain_filter_arp_fini();
nft_chain_filter_ipv6_fini();
nft_chain_filter_ipv4_fini();
nft_chain_filter_netdev_fini();
}
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