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Diffstat (limited to 'net/socket.c')
-rw-r--r--net/socket.c301
1 files changed, 71 insertions, 230 deletions
diff --git a/net/socket.c b/net/socket.c
index 2f378449bc1b..a93c99b518ca 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -163,12 +163,6 @@ static DEFINE_SPINLOCK(net_family_lock);
static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly;
/*
- * Statistics counters of the socket lists
- */
-
-static DEFINE_PER_CPU(int, sockets_in_use);
-
-/*
* Support routines.
* Move socket addresses back and forth across the kernel/user
* divide and look after the messy bits.
@@ -580,7 +574,6 @@ struct socket *sock_alloc(void)
inode->i_gid = current_fsgid();
inode->i_op = &sockfs_inode_ops;
- this_cpu_add(sockets_in_use, 1);
return sock;
}
EXPORT_SYMBOL(sock_alloc);
@@ -607,7 +600,6 @@ void sock_release(struct socket *sock)
if (rcu_dereference_protected(sock->wq, 1)->fasync_list)
pr_err("%s: fasync list not empty!\n", __func__);
- this_cpu_sub(sockets_in_use, 1);
if (!sock->file) {
iput(SOCK_INODE(sock));
return;
@@ -969,9 +961,28 @@ static long sock_do_ioctl(struct net *net, struct socket *sock,
* If this ioctl is unknown try to hand it down
* to the NIC driver.
*/
- if (err == -ENOIOCTLCMD)
- err = dev_ioctl(net, cmd, argp);
+ if (err != -ENOIOCTLCMD)
+ return err;
+ if (cmd == SIOCGIFCONF) {
+ struct ifconf ifc;
+ if (copy_from_user(&ifc, argp, sizeof(struct ifconf)))
+ return -EFAULT;
+ rtnl_lock();
+ err = dev_ifconf(net, &ifc, sizeof(struct ifreq));
+ rtnl_unlock();
+ if (!err && copy_to_user(argp, &ifc, sizeof(struct ifconf)))
+ err = -EFAULT;
+ } else {
+ struct ifreq ifr;
+ bool need_copyout;
+ if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
+ return -EFAULT;
+ err = dev_ioctl(net, cmd, &ifr, &need_copyout);
+ if (!err && need_copyout)
+ if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
+ }
return err;
}
@@ -996,12 +1007,19 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg)
sock = file->private_data;
sk = sock->sk;
net = sock_net(sk);
- if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) {
- err = dev_ioctl(net, cmd, argp);
+ if (unlikely(cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15))) {
+ struct ifreq ifr;
+ bool need_copyout;
+ if (copy_from_user(&ifr, argp, sizeof(struct ifreq)))
+ return -EFAULT;
+ err = dev_ioctl(net, cmd, &ifr, &need_copyout);
+ if (!err && need_copyout)
+ if (copy_to_user(argp, &ifr, sizeof(struct ifreq)))
+ return -EFAULT;
} else
#ifdef CONFIG_WEXT_CORE
if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) {
- err = dev_ioctl(net, cmd, argp);
+ err = wext_handle_ioctl(net, cmd, argp);
} else
#endif
switch (cmd) {
@@ -2621,29 +2639,11 @@ out_fs:
core_initcall(sock_init); /* early initcall */
-static int __init jit_init(void)
-{
-#ifdef CONFIG_BPF_JIT_ALWAYS_ON
- bpf_jit_enable = 1;
-#endif
- return 0;
-}
-pure_initcall(jit_init);
-
#ifdef CONFIG_PROC_FS
void socket_seq_show(struct seq_file *seq)
{
- int cpu;
- int counter = 0;
-
- for_each_possible_cpu(cpu)
- counter += per_cpu(sockets_in_use, cpu);
-
- /* It can be negative, by the way. 8) */
- if (counter < 0)
- counter = 0;
-
- seq_printf(seq, "sockets: used %d\n", counter);
+ seq_printf(seq, "sockets: used %d\n",
+ sock_inuse_get(seq->private));
}
#endif /* CONFIG_PROC_FS */
@@ -2680,89 +2680,25 @@ static int do_siocgstampns(struct net *net, struct socket *sock,
return err;
}
-static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32)
-{
- struct ifreq __user *uifr;
- int err;
-
- uifr = compat_alloc_user_space(sizeof(struct ifreq));
- if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
- return -EFAULT;
-
- err = dev_ioctl(net, SIOCGIFNAME, uifr);
- if (err)
- return err;
-
- if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq)))
- return -EFAULT;
-
- return 0;
-}
-
-static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
+static int compat_dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32)
{
struct compat_ifconf ifc32;
struct ifconf ifc;
- struct ifconf __user *uifc;
- struct compat_ifreq __user *ifr32;
- struct ifreq __user *ifr;
- unsigned int i, j;
int err;
if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf)))
return -EFAULT;
- memset(&ifc, 0, sizeof(ifc));
- if (ifc32.ifcbuf == 0) {
- ifc32.ifc_len = 0;
- ifc.ifc_len = 0;
- ifc.ifc_req = NULL;
- uifc = compat_alloc_user_space(sizeof(struct ifconf));
- } else {
- size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) *
- sizeof(struct ifreq);
- uifc = compat_alloc_user_space(sizeof(struct ifconf) + len);
- ifc.ifc_len = len;
- ifr = ifc.ifc_req = (void __user *)(uifc + 1);
- ifr32 = compat_ptr(ifc32.ifcbuf);
- for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) {
- if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq)))
- return -EFAULT;
- ifr++;
- ifr32++;
- }
- }
- if (copy_to_user(uifc, &ifc, sizeof(struct ifconf)))
- return -EFAULT;
+ ifc.ifc_len = ifc32.ifc_len;
+ ifc.ifc_req = compat_ptr(ifc32.ifcbuf);
- err = dev_ioctl(net, SIOCGIFCONF, uifc);
+ rtnl_lock();
+ err = dev_ifconf(net, &ifc, sizeof(struct compat_ifreq));
+ rtnl_unlock();
if (err)
return err;
- if (copy_from_user(&ifc, uifc, sizeof(struct ifconf)))
- return -EFAULT;
-
- ifr = ifc.ifc_req;
- ifr32 = compat_ptr(ifc32.ifcbuf);
- for (i = 0, j = 0;
- i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len;
- i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) {
- if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq)))
- return -EFAULT;
- ifr32++;
- ifr++;
- }
-
- if (ifc32.ifcbuf == 0) {
- /* Translate from 64-bit structure multiple to
- * a 32-bit one.
- */
- i = ifc.ifc_len;
- i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq));
- ifc32.ifc_len = i;
- } else {
- ifc32.ifc_len = i;
- }
+ ifc32.ifc_len = ifc.ifc_len;
if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf)))
return -EFAULT;
@@ -2773,9 +2709,9 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
{
struct compat_ethtool_rxnfc __user *compat_rxnfc;
bool convert_in = false, convert_out = false;
- size_t buf_size = ALIGN(sizeof(struct ifreq), 8);
- struct ethtool_rxnfc __user *rxnfc;
- struct ifreq __user *ifr;
+ size_t buf_size = 0;
+ struct ethtool_rxnfc __user *rxnfc = NULL;
+ struct ifreq ifr;
u32 rule_cnt = 0, actual_rule_cnt;
u32 ethcmd;
u32 data;
@@ -2812,18 +2748,14 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
case ETHTOOL_SRXCLSRLDEL:
buf_size += sizeof(struct ethtool_rxnfc);
convert_in = true;
+ rxnfc = compat_alloc_user_space(buf_size);
break;
}
- ifr = compat_alloc_user_space(buf_size);
- rxnfc = (void __user *)ifr + ALIGN(sizeof(struct ifreq), 8);
-
- if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ))
+ if (copy_from_user(&ifr.ifr_name, &ifr32->ifr_name, IFNAMSIZ))
return -EFAULT;
- if (put_user(convert_in ? rxnfc : compat_ptr(data),
- &ifr->ifr_ifru.ifru_data))
- return -EFAULT;
+ ifr.ifr_data = convert_in ? rxnfc : (void __user *)compat_rxnfc;
if (convert_in) {
/* We expect there to be holes between fs.m_ext and
@@ -2851,7 +2783,7 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
return -EFAULT;
}
- ret = dev_ioctl(net, SIOCETHTOOL, ifr);
+ ret = dev_ioctl(net, SIOCETHTOOL, &ifr, NULL);
if (ret)
return ret;
@@ -2892,113 +2824,43 @@ static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32)
static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32)
{
- void __user *uptr;
compat_uptr_t uptr32;
- struct ifreq __user *uifr;
+ struct ifreq ifr;
+ void __user *saved;
+ int err;
- uifr = compat_alloc_user_space(sizeof(*uifr));
- if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq)))
+ if (copy_from_user(&ifr, uifr32, sizeof(struct compat_ifreq)))
return -EFAULT;
if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu))
return -EFAULT;
- uptr = compat_ptr(uptr32);
-
- if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc))
- return -EFAULT;
-
- return dev_ioctl(net, SIOCWANDEV, uifr);
-}
-
-static int bond_ioctl(struct net *net, unsigned int cmd,
- struct compat_ifreq __user *ifr32)
-{
- struct ifreq kifr;
- mm_segment_t old_fs;
- int err;
+ saved = ifr.ifr_settings.ifs_ifsu.raw_hdlc;
+ ifr.ifr_settings.ifs_ifsu.raw_hdlc = compat_ptr(uptr32);
- switch (cmd) {
- case SIOCBONDENSLAVE:
- case SIOCBONDRELEASE:
- case SIOCBONDSETHWADDR:
- case SIOCBONDCHANGEACTIVE:
- if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq)))
- return -EFAULT;
-
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- err = dev_ioctl(net, cmd,
- (struct ifreq __user __force *) &kifr);
- set_fs(old_fs);
-
- return err;
- default:
- return -ENOIOCTLCMD;
+ err = dev_ioctl(net, SIOCWANDEV, &ifr, NULL);
+ if (!err) {
+ ifr.ifr_settings.ifs_ifsu.raw_hdlc = saved;
+ if (copy_to_user(uifr32, &ifr, sizeof(struct compat_ifreq)))
+ err = -EFAULT;
}
+ return err;
}
/* Handle ioctls that use ifreq::ifr_data and just need struct ifreq converted */
static int compat_ifr_data_ioctl(struct net *net, unsigned int cmd,
struct compat_ifreq __user *u_ifreq32)
{
- struct ifreq __user *u_ifreq64;
- char tmp_buf[IFNAMSIZ];
- void __user *data64;
+ struct ifreq ifreq;
u32 data32;
- if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]),
- IFNAMSIZ))
+ if (copy_from_user(ifreq.ifr_name, u_ifreq32->ifr_name, IFNAMSIZ))
return -EFAULT;
- if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data))
+ if (get_user(data32, &u_ifreq32->ifr_data))
return -EFAULT;
- data64 = compat_ptr(data32);
+ ifreq.ifr_data = compat_ptr(data32);
- u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64));
-
- if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0],
- IFNAMSIZ))
- return -EFAULT;
- if (put_user(data64, &u_ifreq64->ifr_ifru.ifru_data))
- return -EFAULT;
-
- return dev_ioctl(net, cmd, u_ifreq64);
-}
-
-static int dev_ifsioc(struct net *net, struct socket *sock,
- unsigned int cmd, struct compat_ifreq __user *uifr32)
-{
- struct ifreq __user *uifr;
- int err;
-
- uifr = compat_alloc_user_space(sizeof(*uifr));
- if (copy_in_user(uifr, uifr32, sizeof(*uifr32)))
- return -EFAULT;
-
- err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr);
-
- if (!err) {
- switch (cmd) {
- case SIOCGIFFLAGS:
- case SIOCGIFMETRIC:
- case SIOCGIFMTU:
- case SIOCGIFMEM:
- case SIOCGIFHWADDR:
- case SIOCGIFINDEX:
- case SIOCGIFADDR:
- case SIOCGIFBRDADDR:
- case SIOCGIFDSTADDR:
- case SIOCGIFNETMASK:
- case SIOCGIFPFLAGS:
- case SIOCGIFTXQLEN:
- case SIOCGMIIPHY:
- case SIOCGMIIREG:
- if (copy_in_user(uifr32, uifr, sizeof(*uifr32)))
- err = -EFAULT;
- break;
- }
- }
- return err;
+ return dev_ioctl(net, cmd, &ifreq, NULL);
}
static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
@@ -3006,7 +2868,6 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
{
struct ifreq ifr;
struct compat_ifmap __user *uifmap32;
- mm_segment_t old_fs;
int err;
uifmap32 = &uifr32->ifr_ifru.ifru_map;
@@ -3020,10 +2881,7 @@ static int compat_sioc_ifmap(struct net *net, unsigned int cmd,
if (err)
return -EFAULT;
- old_fs = get_fs();
- set_fs(KERNEL_DS);
- err = dev_ioctl(net, cmd, (void __user __force *)&ifr);
- set_fs(old_fs);
+ err = dev_ioctl(net, cmd, &ifr, NULL);
if (cmd == SIOCGIFMAP && !err) {
err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name));
@@ -3156,10 +3014,8 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCSIFBR:
case SIOCGIFBR:
return old_bridge_ioctl(argp);
- case SIOCGIFNAME:
- return dev_ifname32(net, argp);
case SIOCGIFCONF:
- return dev_ifconf(net, argp);
+ return compat_dev_ifconf(net, argp);
case SIOCETHTOOL:
return ethtool_ioctl(net, argp);
case SIOCWANDEV:
@@ -3167,11 +3023,6 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCGIFMAP:
case SIOCSIFMAP:
return compat_sioc_ifmap(net, cmd, argp);
- case SIOCBONDENSLAVE:
- case SIOCBONDRELEASE:
- case SIOCBONDSETHWADDR:
- case SIOCBONDCHANGEACTIVE:
- return bond_ioctl(net, cmd, argp);
case SIOCADDRT:
case SIOCDELRT:
return routing_ioctl(net, sock, cmd, argp);
@@ -3231,12 +3082,15 @@ static int compat_sock_ioctl_trans(struct file *file, struct socket *sock,
case SIOCGMIIPHY:
case SIOCGMIIREG:
case SIOCSMIIREG:
- return dev_ifsioc(net, sock, cmd, argp);
-
case SIOCSARP:
case SIOCGARP:
case SIOCDARP:
case SIOCATMARK:
+ case SIOCBONDENSLAVE:
+ case SIOCBONDRELEASE:
+ case SIOCBONDSETHWADDR:
+ case SIOCBONDCHANGEACTIVE:
+ case SIOCGIFNAME:
return sock_do_ioctl(net, sock, cmd, arg);
}
@@ -3391,19 +3245,6 @@ int kernel_sendpage_locked(struct sock *sk, struct page *page, int offset,
}
EXPORT_SYMBOL(kernel_sendpage_locked);
-int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg)
-{
- mm_segment_t oldfs = get_fs();
- int err;
-
- set_fs(KERNEL_DS);
- err = sock->ops->ioctl(sock, cmd, arg);
- set_fs(oldfs);
-
- return err;
-}
-EXPORT_SYMBOL(kernel_sock_ioctl);
-
int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how)
{
return sock->ops->shutdown(sock, how);