diff options
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 2142 |
1 files changed, 1626 insertions, 516 deletions
diff --git a/net/socket.c b/net/socket.c index 9d3fbfbc853..abf56b2a14f 100644 --- a/net/socket.c +++ b/net/socket.c @@ -63,15 +63,16 @@ #include <linux/file.h> #include <linux/net.h> #include <linux/interrupt.h> +#include <linux/thread_info.h> #include <linux/rcupdate.h> #include <linux/netdevice.h> #include <linux/proc_fs.h> #include <linux/seq_file.h> #include <linux/mutex.h> -#include <linux/wanrouter.h> #include <linux/if_bridge.h> #include <linux/if_frad.h> #include <linux/if_vlan.h> +#include <linux/ptp_classify.h> #include <linux/init.h> #include <linux/poll.h> #include <linux/cache.h> @@ -85,15 +86,32 @@ #include <linux/audit.h> #include <linux/wireless.h> #include <linux/nsproxy.h> +#include <linux/magic.h> +#include <linux/slab.h> +#include <linux/xattr.h> #include <asm/uaccess.h> #include <asm/unistd.h> #include <net/compat.h> +#include <net/wext.h> +#include <net/cls_cgroup.h> #include <net/sock.h> #include <linux/netfilter.h> +#include <linux/if_tun.h> +#include <linux/ipv6_route.h> +#include <linux/route.h> +#include <linux/sockios.h> +#include <linux/atalk.h> +#include <net/busy_poll.h> + +#ifdef CONFIG_NET_RX_BUSY_POLL +unsigned int sysctl_net_busy_read __read_mostly; +unsigned int sysctl_net_busy_poll __read_mostly; +#endif + static int sock_no_open(struct inode *irrelevant, struct file *dontcare); static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, unsigned long nr_segs, loff_t pos); @@ -113,7 +131,7 @@ static int sock_fasync(int fd, struct file *filp, int on); static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more); static ssize_t sock_splice_read(struct file *file, loff_t *ppos, - struct pipe_inode_info *pipe, size_t len, + struct pipe_inode_info *pipe, size_t len, unsigned int flags); /* @@ -145,13 +163,13 @@ static const struct file_operations socket_file_ops = { */ static DEFINE_SPINLOCK(net_family_lock); -static const struct net_proto_family *net_families[NPROTO] __read_mostly; +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) = 0; +static DEFINE_PER_CPU(int, sockets_in_use); /* * Support routines. @@ -159,15 +177,6 @@ static DEFINE_PER_CPU(int, sockets_in_use) = 0; * divide and look after the messy bits. */ -#define MAX_SOCK_ADDR 128 /* 108 for Unix domain - - 16 for IP, 16 for IPX, - 24 for IPv6, - about 80 for AX.25 - must be at least one bigger than - the AF_UNIX size (see net/unix/af_unix.c - :unix_mkname()). - */ - /** * move_addr_to_kernel - copy a socket address into kernel space * @uaddr: Address in user space @@ -179,9 +188,9 @@ static DEFINE_PER_CPU(int, sockets_in_use) = 0; * invalid addresses -EFAULT is returned. On a success 0 is returned. */ -int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr) +int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr_storage *kaddr) { - if (ulen < 0 || ulen > MAX_SOCK_ADDR) + if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) return -EINVAL; if (ulen == 0) return 0; @@ -207,18 +216,19 @@ int move_addr_to_kernel(void __user *uaddr, int ulen, void *kaddr) * specified. Zero is returned for a success. */ -int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, - int __user *ulen) +static int move_addr_to_user(struct sockaddr_storage *kaddr, int klen, + void __user *uaddr, int __user *ulen) { int err; int len; + BUG_ON(klen > sizeof(struct sockaddr_storage)); err = get_user(len, ulen); if (err) return err; if (len > klen) len = klen; - if (len < 0 || len > MAX_SOCK_ADDR) + if (len < 0) return -EINVAL; if (len) { if (audit_sockaddr(klen, kaddr)) @@ -233,20 +243,25 @@ int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, return __put_user(klen, ulen); } -#define SOCKFS_MAGIC 0x534F434B - static struct kmem_cache *sock_inode_cachep __read_mostly; static struct inode *sock_alloc_inode(struct super_block *sb) { struct socket_alloc *ei; + struct socket_wq *wq; ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); if (!ei) return NULL; - init_waitqueue_head(&ei->socket.wait); + wq = kmalloc(sizeof(*wq), GFP_KERNEL); + if (!wq) { + kmem_cache_free(sock_inode_cachep, ei); + return NULL; + } + init_waitqueue_head(&wq->wait); + wq->fasync_list = NULL; + RCU_INIT_POINTER(ei->socket.wq, wq); - ei->socket.fasync_list = NULL; ei->socket.state = SS_UNCONNECTED; ei->socket.flags = 0; ei->socket.ops = NULL; @@ -258,11 +273,16 @@ static struct inode *sock_alloc_inode(struct super_block *sb) static void sock_destroy_inode(struct inode *inode) { - kmem_cache_free(sock_inode_cachep, - container_of(inode, struct socket_alloc, vfs_inode)); + struct socket_alloc *ei; + struct socket_wq *wq; + + ei = container_of(inode, struct socket_alloc, vfs_inode); + wq = rcu_dereference_protected(ei->socket.wq, 1); + kfree_rcu(wq, rcu); + kmem_cache_free(sock_inode_cachep, ei); } -static void init_once(struct kmem_cache *cachep, void *foo) +static void init_once(void *foo) { struct socket_alloc *ei = (struct socket_alloc *)foo; @@ -283,40 +303,12 @@ static int init_inodecache(void) return 0; } -static struct super_operations sockfs_ops = { - .alloc_inode = sock_alloc_inode, - .destroy_inode =sock_destroy_inode, - .statfs = simple_statfs, +static const struct super_operations sockfs_ops = { + .alloc_inode = sock_alloc_inode, + .destroy_inode = sock_destroy_inode, + .statfs = simple_statfs, }; -static int sockfs_get_sb(struct file_system_type *fs_type, - int flags, const char *dev_name, void *data, - struct vfsmount *mnt) -{ - return get_sb_pseudo(fs_type, "socket:", &sockfs_ops, SOCKFS_MAGIC, - mnt); -} - -static struct vfsmount *sock_mnt __read_mostly; - -static struct file_system_type sock_fs_type = { - .name = "sockfs", - .get_sb = sockfs_get_sb, - .kill_sb = kill_anon_super, -}; - -static int sockfs_delete_dentry(struct dentry *dentry) -{ - /* - * At creation time, we pretended this dentry was hashed - * (by clearing DCACHE_UNHASHED bit in d_flags) - * At delete time, we restore the truth : not hashed. - * (so that dput() can proceed correctly) - */ - dentry->d_flags |= DCACHE_UNHASHED; - return 0; -} - /* * sockfs_dname() is called from d_path(). */ @@ -326,11 +318,25 @@ static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) dentry->d_inode->i_ino); } -static struct dentry_operations sockfs_dentry_operations = { - .d_delete = sockfs_delete_dentry, +static const struct dentry_operations sockfs_dentry_operations = { .d_dname = sockfs_dname, }; +static struct dentry *sockfs_mount(struct file_system_type *fs_type, + int flags, const char *dev_name, void *data) +{ + return mount_pseudo(fs_type, "socket:", &sockfs_ops, + &sockfs_dentry_operations, SOCKFS_MAGIC); +} + +static struct vfsmount *sock_mnt __read_mostly; + +static struct file_system_type sock_fs_type = { + .name = "sockfs", + .mount = sockfs_mount, + .kill_sb = kill_anon_super, +}; + /* * Obtains the first available file descriptor and sets it up for use. * @@ -348,72 +354,61 @@ static struct dentry_operations sockfs_dentry_operations = { * but we take care of internal coherence yet. */ -static int sock_alloc_fd(struct file **filep) +struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname) { - int fd; - - fd = get_unused_fd(); - if (likely(fd >= 0)) { - struct file *file = get_empty_filp(); - - *filep = file; - if (unlikely(!file)) { - put_unused_fd(fd); - return -ENFILE; - } - } else - *filep = NULL; - return fd; -} - -static int sock_attach_fd(struct socket *sock, struct file *file) -{ - struct dentry *dentry; struct qstr name = { .name = "" }; + struct path path; + struct file *file; - dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name); - if (unlikely(!dentry)) - return -ENOMEM; + if (dname) { + name.name = dname; + name.len = strlen(name.name); + } else if (sock->sk) { + name.name = sock->sk->sk_prot_creator->name; + name.len = strlen(name.name); + } + path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); + if (unlikely(!path.dentry)) + return ERR_PTR(-ENOMEM); + path.mnt = mntget(sock_mnt); - dentry->d_op = &sockfs_dentry_operations; - /* - * We dont want to push this dentry into global dentry hash table. - * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED - * This permits a working /proc/$pid/fd/XXX on sockets - */ - dentry->d_flags &= ~DCACHE_UNHASHED; - d_instantiate(dentry, SOCK_INODE(sock)); + d_instantiate(path.dentry, SOCK_INODE(sock)); + SOCK_INODE(sock)->i_fop = &socket_file_ops; - sock->file = file; - init_file(file, sock_mnt, dentry, FMODE_READ | FMODE_WRITE, + file = alloc_file(&path, FMODE_READ | FMODE_WRITE, &socket_file_ops); - SOCK_INODE(sock)->i_fop = &socket_file_ops; - file->f_flags = O_RDWR; - file->f_pos = 0; - file->private_data = sock; + if (unlikely(IS_ERR(file))) { + /* drop dentry, keep inode */ + ihold(path.dentry->d_inode); + path_put(&path); + return file; + } - return 0; + sock->file = file; + file->f_flags = O_RDWR | (flags & O_NONBLOCK); + file->private_data = sock; + return file; } +EXPORT_SYMBOL(sock_alloc_file); -int sock_map_fd(struct socket *sock) +static int sock_map_fd(struct socket *sock, int flags) { struct file *newfile; - int fd = sock_alloc_fd(&newfile); + int fd = get_unused_fd_flags(flags); + if (unlikely(fd < 0)) + return fd; - if (likely(fd >= 0)) { - int err = sock_attach_fd(sock, newfile); - - if (unlikely(err < 0)) { - put_filp(newfile); - put_unused_fd(fd); - return err; - } + newfile = sock_alloc_file(sock, flags, NULL); + if (likely(!IS_ERR(newfile))) { fd_install(fd, newfile); + return fd; } - return fd; + + put_unused_fd(fd); + return PTR_ERR(newfile); } -static struct socket *sock_from_file(struct file *file, int *err) +struct socket *sock_from_file(struct file *file, int *err) { if (file->f_op == &socket_file_ops) return file->private_data; /* set in sock_map_fd */ @@ -421,9 +416,10 @@ static struct socket *sock_from_file(struct file *file, int *err) *err = -ENOTSOCK; return NULL; } +EXPORT_SYMBOL(sock_from_file); /** - * sockfd_lookup - Go from a file number to its socket slot + * sockfd_lookup - Go from a file number to its socket slot * @fd: file handle * @err: pointer to an error code return * @@ -451,23 +447,87 @@ struct socket *sockfd_lookup(int fd, int *err) fput(file); return sock; } +EXPORT_SYMBOL(sockfd_lookup); static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) { - struct file *file; + struct fd f = fdget(fd); struct socket *sock; *err = -EBADF; - file = fget_light(fd, fput_needed); - if (file) { - sock = sock_from_file(file, err); - if (sock) + if (f.file) { + sock = sock_from_file(f.file, err); + if (likely(sock)) { + *fput_needed = f.flags; return sock; - fput_light(file, *fput_needed); + } + fdput(f); } return NULL; } +#define XATTR_SOCKPROTONAME_SUFFIX "sockprotoname" +#define XATTR_NAME_SOCKPROTONAME (XATTR_SYSTEM_PREFIX XATTR_SOCKPROTONAME_SUFFIX) +#define XATTR_NAME_SOCKPROTONAME_LEN (sizeof(XATTR_NAME_SOCKPROTONAME)-1) +static ssize_t sockfs_getxattr(struct dentry *dentry, + const char *name, void *value, size_t size) +{ + const char *proto_name; + size_t proto_size; + int error; + + error = -ENODATA; + if (!strncmp(name, XATTR_NAME_SOCKPROTONAME, XATTR_NAME_SOCKPROTONAME_LEN)) { + proto_name = dentry->d_name.name; + proto_size = strlen(proto_name); + + if (value) { + error = -ERANGE; + if (proto_size + 1 > size) + goto out; + + strncpy(value, proto_name, proto_size + 1); + } + error = proto_size + 1; + } + +out: + return error; +} + +static ssize_t sockfs_listxattr(struct dentry *dentry, char *buffer, + size_t size) +{ + ssize_t len; + ssize_t used = 0; + + len = security_inode_listsecurity(dentry->d_inode, buffer, size); + if (len < 0) + return len; + used += len; + if (buffer) { + if (size < used) + return -ERANGE; + buffer += len; + } + + len = (XATTR_NAME_SOCKPROTONAME_LEN + 1); + used += len; + if (buffer) { + if (size < used) + return -ERANGE; + memcpy(buffer, XATTR_NAME_SOCKPROTONAME, len); + buffer += len; + } + + return used; +} + +static const struct inode_operations sockfs_inode_ops = { + .getxattr = sockfs_getxattr, + .listxattr = sockfs_listxattr, +}; + /** * sock_alloc - allocate a socket * @@ -481,18 +541,20 @@ static struct socket *sock_alloc(void) struct inode *inode; struct socket *sock; - inode = new_inode(sock_mnt->mnt_sb); + inode = new_inode_pseudo(sock_mnt->mnt_sb); if (!inode) return NULL; sock = SOCKET_I(inode); + kmemcheck_annotate_bitfield(sock, type); + inode->i_ino = get_next_ino(); inode->i_mode = S_IFSOCK | S_IRWXUGO; - inode->i_uid = current->fsuid; - inode->i_gid = current->fsgid; + inode->i_uid = current_fsuid(); + inode->i_gid = current_fsgid(); + inode->i_op = &sockfs_inode_ops; - get_cpu_var(sockets_in_use)++; - put_cpu_var(sockets_in_use); + this_cpu_add(sockets_in_use, 1); return sock; } @@ -510,6 +572,7 @@ static int sock_no_open(struct inode *irrelevant, struct file *dontcare) const struct file_operations bad_sock_fops = { .owner = THIS_MODULE, .open = sock_no_open, + .llseek = noop_llseek, }; /** @@ -531,36 +594,54 @@ void sock_release(struct socket *sock) module_put(owner); } - if (sock->fasync_list) - printk(KERN_ERR "sock_release: fasync list not empty!\n"); + if (rcu_dereference_protected(sock->wq, 1)->fasync_list) + pr_err("%s: fasync list not empty!\n", __func__); + + if (test_bit(SOCK_EXTERNALLY_ALLOCATED, &sock->flags)) + return; - get_cpu_var(sockets_in_use)--; - put_cpu_var(sockets_in_use); + this_cpu_sub(sockets_in_use, 1); if (!sock->file) { iput(SOCK_INODE(sock)); return; } sock->file = NULL; } +EXPORT_SYMBOL(sock_release); -static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t size) +void sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) +{ + *tx_flags = 0; + if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) + *tx_flags |= SKBTX_HW_TSTAMP; + if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) + *tx_flags |= SKBTX_SW_TSTAMP; + if (sock_flag(sk, SOCK_WIFI_STATUS)) + *tx_flags |= SKBTX_WIFI_STATUS; +} +EXPORT_SYMBOL(sock_tx_timestamp); + +static inline int __sock_sendmsg_nosec(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t size) { struct sock_iocb *si = kiocb_to_siocb(iocb); - int err; si->sock = sock; si->scm = NULL; si->msg = msg; si->size = size; - err = security_socket_sendmsg(sock, msg, size); - if (err) - return err; - return sock->ops->sendmsg(iocb, sock, msg, size); } +static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t size) +{ + int err = security_socket_sendmsg(sock, msg, size); + + return err ?: __sock_sendmsg_nosec(iocb, sock, msg, size); +} + int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) { struct kiocb iocb; @@ -574,6 +655,21 @@ int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) ret = wait_on_sync_kiocb(&iocb); return ret; } +EXPORT_SYMBOL(sock_sendmsg); + +static int sock_sendmsg_nosec(struct socket *sock, struct msghdr *msg, size_t size) +{ + struct kiocb iocb; + struct sock_iocb siocb; + int ret; + + init_sync_kiocb(&iocb, NULL); + iocb.private = &siocb; + ret = __sock_sendmsg_nosec(&iocb, sock, msg, size); + if (-EIOCBQUEUED == ret) + ret = wait_on_sync_kiocb(&iocb); + return ret; +} int kernel_sendmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size) @@ -592,6 +688,7 @@ int kernel_sendmsg(struct socket *sock, struct msghdr *msg, set_fs(oldfs); return result; } +EXPORT_SYMBOL(kernel_sendmsg); /* * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) @@ -599,35 +696,84 @@ int kernel_sendmsg(struct socket *sock, struct msghdr *msg, void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, struct sk_buff *skb) { - ktime_t kt = skb->tstamp; - - if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { - struct timeval tv; - /* Race occurred between timestamp enabling and packet - receiving. Fill in the current time for now. */ - if (kt.tv64 == 0) - kt = ktime_get_real(); - skb->tstamp = kt; - tv = ktime_to_timeval(kt); - put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, sizeof(tv), &tv); - } else { - struct timespec ts; - /* Race occurred between timestamp enabling and packet - receiving. Fill in the current time for now. */ - if (kt.tv64 == 0) - kt = ktime_get_real(); - skb->tstamp = kt; - ts = ktime_to_timespec(kt); - put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, sizeof(ts), &ts); + int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); + struct timespec ts[3]; + int empty = 1; + struct skb_shared_hwtstamps *shhwtstamps = + skb_hwtstamps(skb); + + /* Race occurred between timestamp enabling and packet + receiving. Fill in the current time for now. */ + if (need_software_tstamp && skb->tstamp.tv64 == 0) + __net_timestamp(skb); + + if (need_software_tstamp) { + if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { + struct timeval tv; + skb_get_timestamp(skb, &tv); + put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, + sizeof(tv), &tv); + } else { + skb_get_timestampns(skb, &ts[0]); + put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, + sizeof(ts[0]), &ts[0]); + } } -} + + memset(ts, 0, sizeof(ts)); + if (sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE) && + ktime_to_timespec_cond(skb->tstamp, ts + 0)) + empty = 0; + if (shhwtstamps) { + if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && + ktime_to_timespec_cond(shhwtstamps->syststamp, ts + 1)) + empty = 0; + if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && + ktime_to_timespec_cond(shhwtstamps->hwtstamp, ts + 2)) + empty = 0; + } + if (!empty) + put_cmsg(msg, SOL_SOCKET, + SCM_TIMESTAMPING, sizeof(ts), &ts); +} EXPORT_SYMBOL_GPL(__sock_recv_timestamp); -static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, - struct msghdr *msg, size_t size, int flags) +void __sock_recv_wifi_status(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb) +{ + int ack; + + if (!sock_flag(sk, SOCK_WIFI_STATUS)) + return; + if (!skb->wifi_acked_valid) + return; + + ack = skb->wifi_acked; + + put_cmsg(msg, SOL_SOCKET, SCM_WIFI_STATUS, sizeof(ack), &ack); +} +EXPORT_SYMBOL_GPL(__sock_recv_wifi_status); + +static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb) +{ + if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) + put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, + sizeof(__u32), &skb->dropcount); +} + +void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, + struct sk_buff *skb) +{ + sock_recv_timestamp(msg, sk, skb); + sock_recv_drops(msg, sk, skb); +} +EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); + +static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t size, int flags) { - int err; struct sock_iocb *si = kiocb_to_siocb(iocb); si->sock = sock; @@ -636,13 +782,17 @@ static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, si->size = size; si->flags = flags; - err = security_socket_recvmsg(sock, msg, size, flags); - if (err) - return err; - return sock->ops->recvmsg(iocb, sock, msg, size, flags); } +static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, + struct msghdr *msg, size_t size, int flags) +{ + int err = security_socket_recvmsg(sock, msg, size, flags); + + return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); +} + int sock_recvmsg(struct socket *sock, struct msghdr *msg, size_t size, int flags) { @@ -657,7 +807,38 @@ int sock_recvmsg(struct socket *sock, struct msghdr *msg, ret = wait_on_sync_kiocb(&iocb); return ret; } +EXPORT_SYMBOL(sock_recvmsg); +static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, + size_t size, int flags) +{ + struct kiocb iocb; + struct sock_iocb siocb; + int ret; + + init_sync_kiocb(&iocb, NULL); + iocb.private = &siocb; + ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); + if (-EIOCBQUEUED == ret) + ret = wait_on_sync_kiocb(&iocb); + return ret; +} + +/** + * kernel_recvmsg - Receive a message from a socket (kernel space) + * @sock: The socket to receive the message from + * @msg: Received message + * @vec: Input s/g array for message data + * @num: Size of input s/g array + * @size: Number of bytes to read + * @flags: Message flags (MSG_DONTWAIT, etc...) + * + * On return the msg structure contains the scatter/gather array passed in the + * vec argument. The array is modified so that it consists of the unfilled + * portion of the original array. + * + * The returned value is the total number of bytes received, or an error. + */ int kernel_recvmsg(struct socket *sock, struct msghdr *msg, struct kvec *vec, size_t num, size_t size, int flags) { @@ -674,11 +855,7 @@ int kernel_recvmsg(struct socket *sock, struct msghdr *msg, set_fs(oldfs); return result; } - -static void sock_aio_dtor(struct kiocb *iocb) -{ - kfree(iocb->private); -} +EXPORT_SYMBOL(kernel_recvmsg); static ssize_t sock_sendpage(struct file *file, struct page *page, int offset, size_t size, loff_t *ppos, int more) @@ -688,15 +865,15 @@ static ssize_t sock_sendpage(struct file *file, struct page *page, sock = file->private_data; - flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; - if (more) - flags |= MSG_MORE; + flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; + /* more is a combination of MSG_MORE and MSG_SENDPAGE_NOTLAST */ + flags |= more; - return sock->ops->sendpage(sock, page, offset, size, flags); + return kernel_sendpage(sock, page, offset, size, flags); } static ssize_t sock_splice_read(struct file *file, loff_t *ppos, - struct pipe_inode_info *pipe, size_t len, + struct pipe_inode_info *pipe, size_t len, unsigned int flags) { struct socket *sock = file->private_data; @@ -710,12 +887,8 @@ static ssize_t sock_splice_read(struct file *file, loff_t *ppos, static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, struct sock_iocb *siocb) { - if (!is_sync_kiocb(iocb)) { - siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); - if (!siocb) - return NULL; - iocb->ki_dtor = sock_aio_dtor; - } + if (!is_sync_kiocb(iocb)) + BUG(); siocb->kiocb = iocb; iocb->private = siocb; @@ -752,7 +925,7 @@ static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, if (pos != 0) return -ESPIPE; - if (iocb->ki_left == 0) /* Match SYS5 behaviour */ + if (iocb->ki_nbytes == 0) /* Match SYS5 behaviour */ return 0; @@ -807,7 +980,7 @@ static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, */ static DEFINE_MUTEX(br_ioctl_mutex); -static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg) = NULL; +static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) { @@ -815,7 +988,6 @@ void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) br_ioctl_hook = hook; mutex_unlock(&br_ioctl_mutex); } - EXPORT_SYMBOL(brioctl_set); static DEFINE_MUTEX(vlan_ioctl_mutex); @@ -827,7 +999,6 @@ void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) vlan_ioctl_hook = hook; mutex_unlock(&vlan_ioctl_mutex); } - EXPORT_SYMBOL(vlan_ioctl_set); static DEFINE_MUTEX(dlci_ioctl_mutex); @@ -839,9 +1010,26 @@ void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) dlci_ioctl_hook = hook; mutex_unlock(&dlci_ioctl_mutex); } - EXPORT_SYMBOL(dlci_ioctl_set); +static long sock_do_ioctl(struct net *net, struct socket *sock, + unsigned int cmd, unsigned long arg) +{ + int err; + void __user *argp = (void __user *)arg; + + err = sock->ops->ioctl(sock, cmd, arg); + + /* + * If this ioctl is unknown try to hand it down + * to the NIC driver. + */ + if (err == -ENOIOCTLCMD) + err = dev_ioctl(net, cmd, argp); + + return err; +} + /* * With an ioctl, arg may well be a user mode pointer, but we don't know * what to do with it - that's up to the protocol still. @@ -857,15 +1045,15 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) sock = file->private_data; sk = sock->sk; - net = sk->sk_net; + net = sock_net(sk); if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { err = dev_ioctl(net, cmd, argp); } else -#ifdef CONFIG_WIRELESS_EXT +#ifdef CONFIG_WEXT_CORE if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { err = dev_ioctl(net, cmd, argp); } else -#endif /* CONFIG_WIRELESS_EXT */ +#endif switch (cmd) { case FIOSETOWN: case SIOCSPGRP: @@ -915,14 +1103,7 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) mutex_unlock(&dlci_ioctl_mutex); break; default: - err = sock->ops->ioctl(sock, cmd, arg); - - /* - * If this ioctl is unknown try to hand it down - * to the NIC driver. - */ - if (err == -ENOIOCTLCMD) - err = dev_ioctl(net, cmd, argp); + err = sock_do_ioctl(net, sock, cmd, arg); break; } return err; @@ -956,17 +1137,29 @@ out_release: sock = NULL; goto out; } +EXPORT_SYMBOL(sock_create_lite); /* No kernel lock held - perfect */ static unsigned int sock_poll(struct file *file, poll_table *wait) { + unsigned int busy_flag = 0; struct socket *sock; /* * We can't return errors to poll, so it's either yes or no. */ sock = file->private_data; - return sock->ops->poll(file, sock, wait); + + if (sk_can_busy_loop(sock->sk)) { + /* this socket can poll_ll so tell the system call */ + busy_flag = POLL_BUSY_LOOP; + + /* once, only if requested by syscall */ + if (wait && (wait->_key & POLL_BUSY_LOOP)) + sk_busy_loop(sock->sk, 1); + } + + return busy_flag | sock->ops->poll(file, sock, wait); } static int sock_mmap(struct file *file, struct vm_area_struct *vma) @@ -978,16 +1171,6 @@ static int sock_mmap(struct file *file, struct vm_area_struct *vma) static int sock_close(struct inode *inode, struct file *filp) { - /* - * It was possible the inode is NULL we were - * closing an unfinished socket. - */ - - if (!inode) { - printk(KERN_DEBUG "sock_close: NULL inode\n"); - return 0; - } - sock_fasync(-1, filp, 0); sock_release(SOCKET_I(inode)); return 0; } @@ -1000,77 +1183,45 @@ static int sock_close(struct inode *inode, struct file *filp) * 1. fasync_list is modified only under process context socket lock * i.e. under semaphore. * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) - * or under socket lock. - * 3. fasync_list can be used from softirq context, so that - * modification under socket lock have to be enhanced with - * write_lock_bh(&sk->sk_callback_lock). - * --ANK (990710) + * or under socket lock */ static int sock_fasync(int fd, struct file *filp, int on) { - struct fasync_struct *fa, *fna = NULL, **prev; - struct socket *sock; - struct sock *sk; - - if (on) { - fna = kmalloc(sizeof(struct fasync_struct), GFP_KERNEL); - if (fna == NULL) - return -ENOMEM; - } - - sock = filp->private_data; + struct socket *sock = filp->private_data; + struct sock *sk = sock->sk; + struct socket_wq *wq; - sk = sock->sk; - if (sk == NULL) { - kfree(fna); + if (sk == NULL) return -EINVAL; - } lock_sock(sk); + wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); + fasync_helper(fd, filp, on, &wq->fasync_list); - prev = &(sock->fasync_list); - - for (fa = *prev; fa != NULL; prev = &fa->fa_next, fa = *prev) - if (fa->fa_file == filp) - break; - - if (on) { - if (fa != NULL) { - write_lock_bh(&sk->sk_callback_lock); - fa->fa_fd = fd; - write_unlock_bh(&sk->sk_callback_lock); - - kfree(fna); - goto out; - } - fna->fa_file = filp; - fna->fa_fd = fd; - fna->magic = FASYNC_MAGIC; - fna->fa_next = sock->fasync_list; - write_lock_bh(&sk->sk_callback_lock); - sock->fasync_list = fna; - write_unlock_bh(&sk->sk_callback_lock); - } else { - if (fa != NULL) { - write_lock_bh(&sk->sk_callback_lock); - *prev = fa->fa_next; - write_unlock_bh(&sk->sk_callback_lock); - kfree(fa); - } - } + if (!wq->fasync_list) + sock_reset_flag(sk, SOCK_FASYNC); + else + sock_set_flag(sk, SOCK_FASYNC); -out: - release_sock(sock->sk); + release_sock(sk); return 0; } -/* This function may be called only under socket lock or callback_lock */ +/* This function may be called only under socket lock or callback_lock or rcu_lock */ int sock_wake_async(struct socket *sock, int how, int band) { - if (!sock || !sock->fasync_list) + struct socket_wq *wq; + + if (!sock) return -1; + rcu_read_lock(); + wq = rcu_dereference(sock->wq); + if (!wq || !wq->fasync_list) { + rcu_read_unlock(); + return -1; + } switch (how) { case SOCK_WAKE_WAITD: if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) @@ -1082,15 +1233,17 @@ int sock_wake_async(struct socket *sock, int how, int band) /* fall through */ case SOCK_WAKE_IO: call_kill: - __kill_fasync(sock->fasync_list, SIGIO, band); + kill_fasync(&wq->fasync_list, SIGIO, band); break; case SOCK_WAKE_URG: - __kill_fasync(sock->fasync_list, SIGURG, band); + kill_fasync(&wq->fasync_list, SIGURG, band); } + rcu_read_unlock(); return 0; } +EXPORT_SYMBOL(sock_wake_async); -static int __sock_create(struct net *net, int family, int type, int protocol, +int __sock_create(struct net *net, int family, int type, int protocol, struct socket **res, int kern) { int err; @@ -1114,8 +1267,8 @@ static int __sock_create(struct net *net, int family, int type, int protocol, static int warned; if (!warned) { warned = 1; - printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", - current->comm); + pr_info("%s uses obsolete (PF_INET,SOCK_PACKET)\n", + current->comm); } family = PF_PACKET; } @@ -1131,22 +1284,21 @@ static int __sock_create(struct net *net, int family, int type, int protocol, */ sock = sock_alloc(); if (!sock) { - if (net_ratelimit()) - printk(KERN_WARNING "socket: no more sockets\n"); + net_warn_ratelimited("socket: no more sockets\n"); return -ENFILE; /* Not exactly a match, but its the closest posix thing */ } sock->type = type; -#if defined(CONFIG_KMOD) +#ifdef CONFIG_MODULES /* Attempt to load a protocol module if the find failed. * * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user * requested real, full-featured networking support upon configuration. * Otherwise module support will break! */ - if (net_families[family] == NULL) + if (rcu_access_pointer(net_families[family]) == NULL) request_module("net-pf-%d", family); #endif @@ -1166,7 +1318,7 @@ static int __sock_create(struct net *net, int family, int type, int protocol, /* Now protected by module ref count */ rcu_read_unlock(); - err = pf->create(net, sock, protocol); + err = pf->create(net, sock, protocol, kern); if (err < 0) goto out_module_put; @@ -1202,27 +1354,45 @@ out_release: rcu_read_unlock(); goto out_sock_release; } +EXPORT_SYMBOL(__sock_create); int sock_create(int family, int type, int protocol, struct socket **res) { return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); } +EXPORT_SYMBOL(sock_create); int sock_create_kern(int family, int type, int protocol, struct socket **res) { return __sock_create(&init_net, family, type, protocol, res, 1); } +EXPORT_SYMBOL(sock_create_kern); -asmlinkage long sys_socket(int family, int type, int protocol) +SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) { int retval; struct socket *sock; + int flags; + + /* Check the SOCK_* constants for consistency. */ + BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); + BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); + BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); + BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); + + flags = type & ~SOCK_TYPE_MASK; + if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) + return -EINVAL; + type &= SOCK_TYPE_MASK; + + if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) + flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; retval = sock_create(family, type, protocol, &sock); if (retval < 0) goto out; - retval = sock_map_fd(sock); + retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); if (retval < 0) goto out_release; @@ -1239,12 +1409,21 @@ out_release: * Create a pair of connected sockets. */ -asmlinkage long sys_socketpair(int family, int type, int protocol, - int __user *usockvec) +SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, + int __user *, usockvec) { struct socket *sock1, *sock2; int fd1, fd2, err; struct file *newfile1, *newfile2; + int flags; + + flags = type & ~SOCK_TYPE_MASK; + if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) + return -EINVAL; + type &= SOCK_TYPE_MASK; + + if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) + flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; /* * Obtain the first socket and check if the underlying protocol @@ -1263,37 +1442,39 @@ asmlinkage long sys_socketpair(int family, int type, int protocol, if (err < 0) goto out_release_both; - fd1 = sock_alloc_fd(&newfile1); + fd1 = get_unused_fd_flags(flags); if (unlikely(fd1 < 0)) { err = fd1; goto out_release_both; } - fd2 = sock_alloc_fd(&newfile2); + fd2 = get_unused_fd_flags(flags); if (unlikely(fd2 < 0)) { err = fd2; - put_filp(newfile1); - put_unused_fd(fd1); - goto out_release_both; + goto out_put_unused_1; } - err = sock_attach_fd(sock1, newfile1); - if (unlikely(err < 0)) { - goto out_fd2; + newfile1 = sock_alloc_file(sock1, flags, NULL); + if (unlikely(IS_ERR(newfile1))) { + err = PTR_ERR(newfile1); + goto out_put_unused_both; } - err = sock_attach_fd(sock2, newfile2); - if (unlikely(err < 0)) { - fput(newfile1); - goto out_fd1; + newfile2 = sock_alloc_file(sock2, flags, NULL); + if (IS_ERR(newfile2)) { + err = PTR_ERR(newfile2); + goto out_fput_1; } - err = audit_fd_pair(fd1, fd2); - if (err < 0) { - fput(newfile1); - fput(newfile2); - goto out_fd; - } + err = put_user(fd1, &usockvec[0]); + if (err) + goto out_fput_both; + + err = put_user(fd2, &usockvec[1]); + if (err) + goto out_fput_both; + + audit_fd_pair(fd1, fd2); fd_install(fd1, newfile1); fd_install(fd2, newfile2); @@ -1301,33 +1482,32 @@ asmlinkage long sys_socketpair(int family, int type, int protocol, * Not kernel problem. */ - err = put_user(fd1, &usockvec[0]); - if (!err) - err = put_user(fd2, &usockvec[1]); - if (!err) - return 0; + return 0; - sys_close(fd2); - sys_close(fd1); - return err; +out_fput_both: + fput(newfile2); + fput(newfile1); + put_unused_fd(fd2); + put_unused_fd(fd1); + goto out; +out_fput_1: + fput(newfile1); + put_unused_fd(fd2); + put_unused_fd(fd1); + sock_release(sock2); + goto out; + +out_put_unused_both: + put_unused_fd(fd2); +out_put_unused_1: + put_unused_fd(fd1); out_release_both: sock_release(sock2); out_release_1: sock_release(sock1); out: return err; - -out_fd2: - put_filp(newfile1); - sock_release(sock1); -out_fd1: - put_filp(newfile2); - sock_release(sock2); -out_fd: - put_unused_fd(fd1); - put_unused_fd(fd2); - goto out; } /* @@ -1338,23 +1518,23 @@ out_fd: * the protocol layer (having also checked the address is ok). */ -asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) +SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) { struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int err, fput_needed; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock) { - err = move_addr_to_kernel(umyaddr, addrlen, address); + err = move_addr_to_kernel(umyaddr, addrlen, &address); if (err >= 0) { err = security_socket_bind(sock, - (struct sockaddr *)address, + (struct sockaddr *)&address, addrlen); if (!err) err = sock->ops->bind(sock, (struct sockaddr *) - address, addrlen); + &address, addrlen); } fput_light(sock->file, fput_needed); } @@ -1367,7 +1547,7 @@ asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen) * ready for listening. */ -asmlinkage long sys_listen(int fd, int backlog) +SYSCALL_DEFINE2(listen, int, fd, int, backlog) { struct socket *sock; int err, fput_needed; @@ -1375,8 +1555,8 @@ asmlinkage long sys_listen(int fd, int backlog) sock = sockfd_lookup_light(fd, &err, &fput_needed); if (sock) { - somaxconn = sock->sk->sk_net->sysctl_somaxconn; - if ((unsigned)backlog > somaxconn) + somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; + if ((unsigned int)backlog > somaxconn) backlog = somaxconn; err = security_socket_listen(sock, backlog); @@ -1400,20 +1580,27 @@ asmlinkage long sys_listen(int fd, int backlog) * clean when we restucture accept also. */ -asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, - int __user *upeer_addrlen) +SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, + int __user *, upeer_addrlen, int, flags) { struct socket *sock, *newsock; struct file *newfile; int err, len, newfd, fput_needed; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; + + if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) + return -EINVAL; + + if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) + flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; err = -ENFILE; - if (!(newsock = sock_alloc())) + newsock = sock_alloc(); + if (!newsock) goto out_put; newsock->type = sock->type; @@ -1425,16 +1612,19 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, */ __module_get(newsock->ops->owner); - newfd = sock_alloc_fd(&newfile); + newfd = get_unused_fd_flags(flags); if (unlikely(newfd < 0)) { err = newfd; sock_release(newsock); goto out_put; } - - err = sock_attach_fd(newsock, newfile); - if (err < 0) - goto out_fd_simple; + newfile = sock_alloc_file(newsock, flags, sock->sk->sk_prot_creator->name); + if (unlikely(IS_ERR(newfile))) { + err = PTR_ERR(newfile); + put_unused_fd(newfd); + sock_release(newsock); + goto out_put; + } err = security_socket_accept(sock, newsock); if (err) @@ -1445,13 +1635,13 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, goto out_fd; if (upeer_sockaddr) { - if (newsock->ops->getname(newsock, (struct sockaddr *)address, + if (newsock->ops->getname(newsock, (struct sockaddr *)&address, &len, 2) < 0) { err = -ECONNABORTED; goto out_fd; } - err = move_addr_to_user(address, len, upeer_sockaddr, - upeer_addrlen); + err = move_addr_to_user(&address, + len, upeer_sockaddr, upeer_addrlen); if (err < 0) goto out_fd; } @@ -1461,23 +1651,22 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, fd_install(newfd, newfile); err = newfd; - security_socket_post_accept(sock, newsock); - out_put: fput_light(sock->file, fput_needed); out: return err; -out_fd_simple: - sock_release(newsock); - put_filp(newfile); - put_unused_fd(newfd); - goto out_put; out_fd: fput(newfile); put_unused_fd(newfd); goto out_put; } +SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, + int __user *, upeer_addrlen) +{ + return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); +} + /* * Attempt to connect to a socket with the server address. The address * is in user space so we verify it is OK and move it to kernel space. @@ -1490,26 +1679,26 @@ out_fd: * include the -EINPROGRESS status for such sockets. */ -asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, - int addrlen) +SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, + int, addrlen) { struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int err, fput_needed; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; - err = move_addr_to_kernel(uservaddr, addrlen, address); + err = move_addr_to_kernel(uservaddr, addrlen, &address); if (err < 0) goto out_put; err = - security_socket_connect(sock, (struct sockaddr *)address, addrlen); + security_socket_connect(sock, (struct sockaddr *)&address, addrlen); if (err) goto out_put; - err = sock->ops->connect(sock, (struct sockaddr *)address, addrlen, + err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, sock->file->f_flags); out_put: fput_light(sock->file, fput_needed); @@ -1522,11 +1711,11 @@ out: * name to user space. */ -asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, - int __user *usockaddr_len) +SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, + int __user *, usockaddr_len) { struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int len, err, fput_needed; sock = sockfd_lookup_light(fd, &err, &fput_needed); @@ -1537,10 +1726,10 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, if (err) goto out_put; - err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 0); + err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); if (err) goto out_put; - err = move_addr_to_user(address, len, usockaddr, usockaddr_len); + err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); out_put: fput_light(sock->file, fput_needed); @@ -1553,11 +1742,11 @@ out: * name to user space. */ -asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, - int __user *usockaddr_len) +SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, + int __user *, usockaddr_len) { struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int len, err, fput_needed; sock = sockfd_lookup_light(fd, &err, &fput_needed); @@ -1569,10 +1758,10 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, } err = - sock->ops->getname(sock, (struct sockaddr *)address, &len, + sock->ops->getname(sock, (struct sockaddr *)&address, &len, 1); if (!err) - err = move_addr_to_user(address, len, usockaddr, + err = move_addr_to_user(&address, len, usockaddr, usockaddr_len); fput_light(sock->file, fput_needed); } @@ -1585,17 +1774,19 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, * the protocol. */ -asmlinkage long sys_sendto(int fd, void __user *buff, size_t len, - unsigned flags, struct sockaddr __user *addr, - int addr_len) +SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, + unsigned int, flags, struct sockaddr __user *, addr, + int, addr_len) { struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int err; struct msghdr msg; struct iovec iov; int fput_needed; + if (len > INT_MAX) + len = INT_MAX; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; @@ -1609,10 +1800,10 @@ asmlinkage long sys_sendto(int fd, void __user *buff, size_t len, msg.msg_controllen = 0; msg.msg_namelen = 0; if (addr) { - err = move_addr_to_kernel(addr, addr_len, address); + err = move_addr_to_kernel(addr, addr_len, &address); if (err < 0) goto out_put; - msg.msg_name = address; + msg.msg_name = (struct sockaddr *)&address; msg.msg_namelen = addr_len; } if (sock->file->f_flags & O_NONBLOCK) @@ -1630,7 +1821,8 @@ out: * Send a datagram down a socket. */ -asmlinkage long sys_send(int fd, void __user *buff, size_t len, unsigned flags) +SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, + unsigned int, flags) { return sys_sendto(fd, buff, len, flags, NULL, 0); } @@ -1641,17 +1833,19 @@ asmlinkage long sys_send(int fd, void __user *buff, size_t len, unsigned flags) * sender address from kernel to user space. */ -asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size, - unsigned flags, struct sockaddr __user *addr, - int __user *addr_len) +SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, + unsigned int, flags, struct sockaddr __user *, addr, + int __user *, addr_len) { struct socket *sock; struct iovec iov; struct msghdr msg; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; int err, err2; int fput_needed; + if (size > INT_MAX) + size = INT_MAX; sock = sockfd_lookup_light(fd, &err, &fput_needed); if (!sock) goto out; @@ -1662,14 +1856,17 @@ asmlinkage long sys_recvfrom(int fd, void __user *ubuf, size_t size, msg.msg_iov = &iov; iov.iov_len = size; iov.iov_base = ubuf; - msg.msg_name = address; - msg.msg_namelen = MAX_SOCK_ADDR; + /* Save some cycles and don't copy the address if not needed */ + msg.msg_name = addr ? (struct sockaddr *)&address : NULL; + /* We assume all kernel code knows the size of sockaddr_storage */ + msg.msg_namelen = 0; if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; err = sock_recvmsg(sock, &msg, size, flags); if (err >= 0 && addr != NULL) { - err2 = move_addr_to_user(address, msg.msg_namelen, addr, addr_len); + err2 = move_addr_to_user(&address, + msg.msg_namelen, addr, addr_len); if (err2 < 0) err = err2; } @@ -1683,8 +1880,8 @@ out: * Receive a datagram from a socket. */ -asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, - unsigned flags) +SYSCALL_DEFINE4(recv, int, fd, void __user *, ubuf, size_t, size, + unsigned int, flags) { return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); } @@ -1694,8 +1891,8 @@ asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, * to pass the user mode parameter for the protocols to sort out. */ -asmlinkage long sys_setsockopt(int fd, int level, int optname, - char __user *optval, int optlen) +SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, + char __user *, optval, int, optlen) { int err, fput_needed; struct socket *sock; @@ -1728,8 +1925,8 @@ out_put: * to pass a user mode parameter for the protocols to sort out. */ -asmlinkage long sys_getsockopt(int fd, int level, int optname, - char __user *optval, int __user *optlen) +SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, + char __user *, optval, int __user *, optlen) { int err, fput_needed; struct socket *sock; @@ -1758,7 +1955,7 @@ out_put: * Shutdown a socket. */ -asmlinkage long sys_shutdown(int fd, int how) +SYSCALL_DEFINE2(shutdown, int, fd, int, how) { int err, fput_needed; struct socket *sock; @@ -1780,73 +1977,82 @@ asmlinkage long sys_shutdown(int fd, int how) #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) -/* - * BSD sendmsg interface - */ +struct used_address { + struct sockaddr_storage name; + unsigned int name_len; +}; + +static int copy_msghdr_from_user(struct msghdr *kmsg, + struct msghdr __user *umsg) +{ + if (copy_from_user(kmsg, umsg, sizeof(struct msghdr))) + return -EFAULT; + + if (kmsg->msg_namelen < 0) + return -EINVAL; + + if (kmsg->msg_namelen > sizeof(struct sockaddr_storage)) + kmsg->msg_namelen = sizeof(struct sockaddr_storage); + return 0; +} -asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) +static int ___sys_sendmsg(struct socket *sock, struct msghdr __user *msg, + struct msghdr *msg_sys, unsigned int flags, + struct used_address *used_address) { struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg; - struct socket *sock; - char address[MAX_SOCK_ADDR]; + struct sockaddr_storage address; struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; unsigned char ctl[sizeof(struct cmsghdr) + 20] __attribute__ ((aligned(sizeof(__kernel_size_t)))); /* 20 is size of ipv6_pktinfo */ unsigned char *ctl_buf = ctl; - struct msghdr msg_sys; - int err, ctl_len, iov_size, total_len; - int fput_needed; + int err, ctl_len, total_len; err = -EFAULT; if (MSG_CMSG_COMPAT & flags) { - if (get_compat_msghdr(&msg_sys, msg_compat)) + if (get_compat_msghdr(msg_sys, msg_compat)) return -EFAULT; + } else { + err = copy_msghdr_from_user(msg_sys, msg); + if (err) + return err; } - else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) - return -EFAULT; - - sock = sockfd_lookup_light(fd, &err, &fput_needed); - if (!sock) - goto out; - /* do not move before msg_sys is valid */ - err = -EMSGSIZE; - if (msg_sys.msg_iovlen > UIO_MAXIOV) - goto out_put; - - /* Check whether to allocate the iovec area */ - err = -ENOMEM; - iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); - if (msg_sys.msg_iovlen > UIO_FASTIOV) { - iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); + if (msg_sys->msg_iovlen > UIO_FASTIOV) { + err = -EMSGSIZE; + if (msg_sys->msg_iovlen > UIO_MAXIOV) + goto out; + err = -ENOMEM; + iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), + GFP_KERNEL); if (!iov) - goto out_put; + goto out; } /* This will also move the address data into kernel space */ if (MSG_CMSG_COMPAT & flags) { - err = verify_compat_iovec(&msg_sys, iov, address, VERIFY_READ); + err = verify_compat_iovec(msg_sys, iov, &address, VERIFY_READ); } else - err = verify_iovec(&msg_sys, iov, address, VERIFY_READ); + err = verify_iovec(msg_sys, iov, &address, VERIFY_READ); if (err < 0) goto out_freeiov; total_len = err; err = -ENOBUFS; - if (msg_sys.msg_controllen > INT_MAX) + if (msg_sys->msg_controllen > INT_MAX) goto out_freeiov; - ctl_len = msg_sys.msg_controllen; + ctl_len = msg_sys->msg_controllen; if ((MSG_CMSG_COMPAT & flags) && ctl_len) { err = - cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, + cmsghdr_from_user_compat_to_kern(msg_sys, sock->sk, ctl, sizeof(ctl)); if (err) goto out_freeiov; - ctl_buf = msg_sys.msg_control; - ctl_len = msg_sys.msg_controllen; + ctl_buf = msg_sys->msg_control; + ctl_len = msg_sys->msg_controllen; } else if (ctl_len) { if (ctl_len > sizeof(ctl)) { ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); @@ -1855,121 +2061,231 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) } err = -EFAULT; /* - * Careful! Before this, msg_sys.msg_control contains a user pointer. + * Careful! Before this, msg_sys->msg_control contains a user pointer. * Afterwards, it will be a kernel pointer. Thus the compiler-assisted * checking falls down on this. */ - if (copy_from_user(ctl_buf, (void __user *)msg_sys.msg_control, + if (copy_from_user(ctl_buf, + (void __user __force *)msg_sys->msg_control, ctl_len)) goto out_freectl; - msg_sys.msg_control = ctl_buf; + msg_sys->msg_control = ctl_buf; } - msg_sys.msg_flags = flags; + msg_sys->msg_flags = flags; if (sock->file->f_flags & O_NONBLOCK) - msg_sys.msg_flags |= MSG_DONTWAIT; - err = sock_sendmsg(sock, &msg_sys, total_len); + msg_sys->msg_flags |= MSG_DONTWAIT; + /* + * If this is sendmmsg() and current destination address is same as + * previously succeeded address, omit asking LSM's decision. + * used_address->name_len is initialized to UINT_MAX so that the first + * destination address never matches. + */ + if (used_address && msg_sys->msg_name && + used_address->name_len == msg_sys->msg_namelen && + !memcmp(&used_address->name, msg_sys->msg_name, + used_address->name_len)) { + err = sock_sendmsg_nosec(sock, msg_sys, total_len); + goto out_freectl; + } + err = sock_sendmsg(sock, msg_sys, total_len); + /* + * If this is sendmmsg() and sending to current destination address was + * successful, remember it. + */ + if (used_address && err >= 0) { + used_address->name_len = msg_sys->msg_namelen; + if (msg_sys->msg_name) + memcpy(&used_address->name, msg_sys->msg_name, + used_address->name_len); + } out_freectl: if (ctl_buf != ctl) sock_kfree_s(sock->sk, ctl_buf, ctl_len); out_freeiov: if (iov != iovstack) - sock_kfree_s(sock->sk, iov, iov_size); -out_put: + kfree(iov); +out: + return err; +} + +/* + * BSD sendmsg interface + */ + +long __sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags) +{ + int fput_needed, err; + struct msghdr msg_sys; + struct socket *sock; + + sock = sockfd_lookup_light(fd, &err, &fput_needed); + if (!sock) + goto out; + + err = ___sys_sendmsg(sock, msg, &msg_sys, flags, NULL); + fput_light(sock->file, fput_needed); out: return err; } +SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned int, flags) +{ + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + return __sys_sendmsg(fd, msg, flags); +} + /* - * BSD recvmsg interface + * Linux sendmmsg interface */ -asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, - unsigned int flags) +int __sys_sendmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, + unsigned int flags) +{ + int fput_needed, err, datagrams; + struct socket *sock; + struct mmsghdr __user *entry; + struct compat_mmsghdr __user *compat_entry; + struct msghdr msg_sys; + struct used_address used_address; + + if (vlen > UIO_MAXIOV) + vlen = UIO_MAXIOV; + + datagrams = 0; + + sock = sockfd_lookup_light(fd, &err, &fput_needed); + if (!sock) + return err; + + used_address.name_len = UINT_MAX; + entry = mmsg; + compat_entry = (struct compat_mmsghdr __user *)mmsg; + err = 0; + + while (datagrams < vlen) { + if (MSG_CMSG_COMPAT & flags) { + err = ___sys_sendmsg(sock, (struct msghdr __user *)compat_entry, + &msg_sys, flags, &used_address); + if (err < 0) + break; + err = __put_user(err, &compat_entry->msg_len); + ++compat_entry; + } else { + err = ___sys_sendmsg(sock, + (struct msghdr __user *)entry, + &msg_sys, flags, &used_address); + if (err < 0) + break; + err = put_user(err, &entry->msg_len); + ++entry; + } + + if (err) + break; + ++datagrams; + } + + fput_light(sock->file, fput_needed); + + /* We only return an error if no datagrams were able to be sent */ + if (datagrams != 0) + return datagrams; + + return err; +} + +SYSCALL_DEFINE4(sendmmsg, int, fd, struct mmsghdr __user *, mmsg, + unsigned int, vlen, unsigned int, flags) +{ + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + return __sys_sendmmsg(fd, mmsg, vlen, flags); +} + +static int ___sys_recvmsg(struct socket *sock, struct msghdr __user *msg, + struct msghdr *msg_sys, unsigned int flags, int nosec) { struct compat_msghdr __user *msg_compat = (struct compat_msghdr __user *)msg; - struct socket *sock; struct iovec iovstack[UIO_FASTIOV]; struct iovec *iov = iovstack; - struct msghdr msg_sys; unsigned long cmsg_ptr; - int err, iov_size, total_len, len; - int fput_needed; + int err, total_len, len; /* kernel mode address */ - char addr[MAX_SOCK_ADDR]; + struct sockaddr_storage addr; /* user mode address pointers */ struct sockaddr __user *uaddr; int __user *uaddr_len; if (MSG_CMSG_COMPAT & flags) { - if (get_compat_msghdr(&msg_sys, msg_compat)) + if (get_compat_msghdr(msg_sys, msg_compat)) return -EFAULT; + } else { + err = copy_msghdr_from_user(msg_sys, msg); + if (err) + return err; } - else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) - return -EFAULT; - sock = sockfd_lookup_light(fd, &err, &fput_needed); - if (!sock) - goto out; - - err = -EMSGSIZE; - if (msg_sys.msg_iovlen > UIO_MAXIOV) - goto out_put; - - /* Check whether to allocate the iovec area */ - err = -ENOMEM; - iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); - if (msg_sys.msg_iovlen > UIO_FASTIOV) { - iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); + if (msg_sys->msg_iovlen > UIO_FASTIOV) { + err = -EMSGSIZE; + if (msg_sys->msg_iovlen > UIO_MAXIOV) + goto out; + err = -ENOMEM; + iov = kmalloc(msg_sys->msg_iovlen * sizeof(struct iovec), + GFP_KERNEL); if (!iov) - goto out_put; + goto out; } - /* - * Save the user-mode address (verify_iovec will change the - * kernel msghdr to use the kernel address space) + /* Save the user-mode address (verify_iovec will change the + * kernel msghdr to use the kernel address space) */ - - uaddr = (__force void __user *)msg_sys.msg_name; + uaddr = (__force void __user *)msg_sys->msg_name; uaddr_len = COMPAT_NAMELEN(msg); - if (MSG_CMSG_COMPAT & flags) { - err = verify_compat_iovec(&msg_sys, iov, addr, VERIFY_WRITE); - } else - err = verify_iovec(&msg_sys, iov, addr, VERIFY_WRITE); + if (MSG_CMSG_COMPAT & flags) + err = verify_compat_iovec(msg_sys, iov, &addr, VERIFY_WRITE); + else + err = verify_iovec(msg_sys, iov, &addr, VERIFY_WRITE); if (err < 0) goto out_freeiov; total_len = err; - cmsg_ptr = (unsigned long)msg_sys.msg_control; - msg_sys.msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); + cmsg_ptr = (unsigned long)msg_sys->msg_control; + msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); + + /* We assume all kernel code knows the size of sockaddr_storage */ + msg_sys->msg_namelen = 0; if (sock->file->f_flags & O_NONBLOCK) flags |= MSG_DONTWAIT; - err = sock_recvmsg(sock, &msg_sys, total_len, flags); + err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, + total_len, flags); if (err < 0) goto out_freeiov; len = err; if (uaddr != NULL) { - err = move_addr_to_user(addr, msg_sys.msg_namelen, uaddr, + err = move_addr_to_user(&addr, + msg_sys->msg_namelen, uaddr, uaddr_len); if (err < 0) goto out_freeiov; } - err = __put_user((msg_sys.msg_flags & ~MSG_CMSG_COMPAT), + err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), COMPAT_FLAGS(msg)); if (err) goto out_freeiov; if (MSG_CMSG_COMPAT & flags) - err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, + err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, &msg_compat->msg_controllen); else - err = __put_user((unsigned long)msg_sys.msg_control - cmsg_ptr, + err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, &msg->msg_controllen); if (err) goto out_freeiov; @@ -1977,21 +2293,181 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, out_freeiov: if (iov != iovstack) - sock_kfree_s(sock->sk, iov, iov_size); -out_put: + kfree(iov); +out: + return err; +} + +/* + * BSD recvmsg interface + */ + +long __sys_recvmsg(int fd, struct msghdr __user *msg, unsigned flags) +{ + int fput_needed, err; + struct msghdr msg_sys; + struct socket *sock; + + sock = sockfd_lookup_light(fd, &err, &fput_needed); + if (!sock) + goto out; + + err = ___sys_recvmsg(sock, msg, &msg_sys, flags, 0); + fput_light(sock->file, fput_needed); out: return err; } -#ifdef __ARCH_WANT_SYS_SOCKETCALL +SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, + unsigned int, flags) +{ + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + return __sys_recvmsg(fd, msg, flags); +} + +/* + * Linux recvmmsg interface + */ + +int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, + unsigned int flags, struct timespec *timeout) +{ + int fput_needed, err, datagrams; + struct socket *sock; + struct mmsghdr __user *entry; + struct compat_mmsghdr __user *compat_entry; + struct msghdr msg_sys; + struct timespec end_time; + + if (timeout && + poll_select_set_timeout(&end_time, timeout->tv_sec, + timeout->tv_nsec)) + return -EINVAL; + + datagrams = 0; + + sock = sockfd_lookup_light(fd, &err, &fput_needed); + if (!sock) + return err; + + err = sock_error(sock->sk); + if (err) + goto out_put; + + entry = mmsg; + compat_entry = (struct compat_mmsghdr __user *)mmsg; + + while (datagrams < vlen) { + /* + * No need to ask LSM for more than the first datagram. + */ + if (MSG_CMSG_COMPAT & flags) { + err = ___sys_recvmsg(sock, (struct msghdr __user *)compat_entry, + &msg_sys, flags & ~MSG_WAITFORONE, + datagrams); + if (err < 0) + break; + err = __put_user(err, &compat_entry->msg_len); + ++compat_entry; + } else { + err = ___sys_recvmsg(sock, + (struct msghdr __user *)entry, + &msg_sys, flags & ~MSG_WAITFORONE, + datagrams); + if (err < 0) + break; + err = put_user(err, &entry->msg_len); + ++entry; + } + + if (err) + break; + ++datagrams; + + /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ + if (flags & MSG_WAITFORONE) + flags |= MSG_DONTWAIT; + + if (timeout) { + ktime_get_ts(timeout); + *timeout = timespec_sub(end_time, *timeout); + if (timeout->tv_sec < 0) { + timeout->tv_sec = timeout->tv_nsec = 0; + break; + } + + /* Timeout, return less than vlen datagrams */ + if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) + break; + } + + /* Out of band data, return right away */ + if (msg_sys.msg_flags & MSG_OOB) + break; + } + +out_put: + fput_light(sock->file, fput_needed); + + if (err == 0) + return datagrams; + + if (datagrams != 0) { + /* + * We may return less entries than requested (vlen) if the + * sock is non block and there aren't enough datagrams... + */ + if (err != -EAGAIN) { + /* + * ... or if recvmsg returns an error after we + * received some datagrams, where we record the + * error to return on the next call or if the + * app asks about it using getsockopt(SO_ERROR). + */ + sock->sk->sk_err = -err; + } + + return datagrams; + } + + return err; +} + +SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, + unsigned int, vlen, unsigned int, flags, + struct timespec __user *, timeout) +{ + int datagrams; + struct timespec timeout_sys; + + if (flags & MSG_CMSG_COMPAT) + return -EINVAL; + + if (!timeout) + return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); + + if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) + return -EFAULT; + + datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); + + if (datagrams > 0 && + copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) + datagrams = -EFAULT; + return datagrams; +} + +#ifdef __ARCH_WANT_SYS_SOCKETCALL /* Argument list sizes for sys_socketcall */ #define AL(x) ((x) * sizeof(unsigned long)) -static const unsigned char nargs[18]={ - AL(0),AL(3),AL(3),AL(3),AL(2),AL(3), - AL(3),AL(3),AL(4),AL(4),AL(4),AL(6), - AL(6),AL(2),AL(5),AL(5),AL(3),AL(3) +static const unsigned char nargs[21] = { + AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), + AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), + AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), + AL(4), AL(5), AL(4) }; #undef AL @@ -2004,17 +2480,22 @@ static const unsigned char nargs[18]={ * it is set by the callees. */ -asmlinkage long sys_socketcall(int call, unsigned long __user *args) +SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) { - unsigned long a[6]; + unsigned long a[AUDITSC_ARGS]; unsigned long a0, a1; int err; + unsigned int len; - if (call < 1 || call > SYS_RECVMSG) + if (call < 1 || call > SYS_SENDMMSG) + return -EINVAL; + + len = nargs[call]; + if (len > sizeof(a)) return -EINVAL; /* copy_from_user should be SMP safe. */ - if (copy_from_user(a, args, nargs[call])) + if (copy_from_user(a, args, len)) return -EFAULT; err = audit_socketcall(nargs[call] / sizeof(unsigned long), a); @@ -2038,9 +2519,8 @@ asmlinkage long sys_socketcall(int call, unsigned long __user *args) err = sys_listen(a0, a1); break; case SYS_ACCEPT: - err = - sys_accept(a0, (struct sockaddr __user *)a1, - (int __user *)a[2]); + err = sys_accept4(a0, (struct sockaddr __user *)a1, + (int __user *)a[2], 0); break; case SYS_GETSOCKNAME: err = @@ -2084,9 +2564,20 @@ asmlinkage long sys_socketcall(int call, unsigned long __user *args) case SYS_SENDMSG: err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); break; + case SYS_SENDMMSG: + err = sys_sendmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3]); + break; case SYS_RECVMSG: err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); break; + case SYS_RECVMMSG: + err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], + (struct timespec __user *)a[4]); + break; + case SYS_ACCEPT4: + err = sys_accept4(a0, (struct sockaddr __user *)a1, + (int __user *)a[2], a[3]); + break; default: err = -EINVAL; break; @@ -2110,23 +2601,24 @@ int sock_register(const struct net_proto_family *ops) int err; if (ops->family >= NPROTO) { - printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, - NPROTO); + pr_crit("protocol %d >= NPROTO(%d)\n", ops->family, NPROTO); return -ENOBUFS; } spin_lock(&net_family_lock); - if (net_families[ops->family]) + if (rcu_dereference_protected(net_families[ops->family], + lockdep_is_held(&net_family_lock))) err = -EEXIST; else { - net_families[ops->family] = ops; + rcu_assign_pointer(net_families[ops->family], ops); err = 0; } spin_unlock(&net_family_lock); - printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); + pr_info("NET: Registered protocol family %d\n", ops->family); return err; } +EXPORT_SYMBOL(sock_register); /** * sock_unregister - remove a protocol handler @@ -2146,21 +2638,24 @@ void sock_unregister(int family) BUG_ON(family < 0 || family >= NPROTO); spin_lock(&net_family_lock); - net_families[family] = NULL; + RCU_INIT_POINTER(net_families[family], NULL); spin_unlock(&net_family_lock); synchronize_rcu(); - printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); + pr_info("NET: Unregistered protocol family %d\n", family); } +EXPORT_SYMBOL(sock_unregister); static int __init sock_init(void) { + int err; /* - * Initialize sock SLAB cache. + * Initialize the network sysctl infrastructure. */ - - sk_init(); + err = net_sysctl_init(); + if (err) + goto out; /* * Initialize skbuff SLAB cache @@ -2172,17 +2667,34 @@ static int __init sock_init(void) */ init_inodecache(); - register_filesystem(&sock_fs_type); + + err = register_filesystem(&sock_fs_type); + if (err) + goto out_fs; sock_mnt = kern_mount(&sock_fs_type); + if (IS_ERR(sock_mnt)) { + err = PTR_ERR(sock_mnt); + goto out_mount; + } /* The real protocol initialization is performed in later initcalls. */ #ifdef CONFIG_NETFILTER - netfilter_init(); + err = netfilter_init(); + if (err) + goto out; #endif - return 0; + ptp_classifier_init(); + +out: + return err; + +out_mount: + unregister_filesystem(&sock_fs_type); +out_fs: + goto out; } core_initcall(sock_init); /* early initcall */ @@ -2205,15 +2717,621 @@ void socket_seq_show(struct seq_file *seq) #endif /* CONFIG_PROC_FS */ #ifdef CONFIG_COMPAT -static long compat_sock_ioctl(struct file *file, unsigned cmd, +static int do_siocgstamp(struct net *net, struct socket *sock, + unsigned int cmd, void __user *up) +{ + mm_segment_t old_fs = get_fs(); + struct timeval ktv; + int err; + + set_fs(KERNEL_DS); + err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); + set_fs(old_fs); + if (!err) + err = compat_put_timeval(&ktv, up); + + return err; +} + +static int do_siocgstampns(struct net *net, struct socket *sock, + unsigned int cmd, void __user *up) +{ + mm_segment_t old_fs = get_fs(); + struct timespec kts; + int err; + + set_fs(KERNEL_DS); + err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); + set_fs(old_fs); + if (!err) + err = compat_put_timespec(&kts, up); + + 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) +{ + 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; + + err = dev_ioctl(net, SIOCGIFCONF, uifc); + 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; + } + if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) + return -EFAULT; + + return 0; +} + +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; + u32 rule_cnt = 0, actual_rule_cnt; + u32 ethcmd; + u32 data; + int ret; + + if (get_user(data, &ifr32->ifr_ifru.ifru_data)) + return -EFAULT; + + compat_rxnfc = compat_ptr(data); + + if (get_user(ethcmd, &compat_rxnfc->cmd)) + return -EFAULT; + + /* Most ethtool structures are defined without padding. + * Unfortunately struct ethtool_rxnfc is an exception. + */ + switch (ethcmd) { + default: + break; + case ETHTOOL_GRXCLSRLALL: + /* Buffer size is variable */ + if (get_user(rule_cnt, &compat_rxnfc->rule_cnt)) + return -EFAULT; + if (rule_cnt > KMALLOC_MAX_SIZE / sizeof(u32)) + return -ENOMEM; + buf_size += rule_cnt * sizeof(u32); + /* fall through */ + case ETHTOOL_GRXRINGS: + case ETHTOOL_GRXCLSRLCNT: + case ETHTOOL_GRXCLSRULE: + case ETHTOOL_SRXCLSRLINS: + convert_out = true; + /* fall through */ + case ETHTOOL_SRXCLSRLDEL: + buf_size += sizeof(struct ethtool_rxnfc); + convert_in = true; + 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)) + return -EFAULT; + + if (put_user(convert_in ? rxnfc : compat_ptr(data), + &ifr->ifr_ifru.ifru_data)) + return -EFAULT; + + if (convert_in) { + /* We expect there to be holes between fs.m_ext and + * fs.ring_cookie and at the end of fs, but nowhere else. + */ + BUILD_BUG_ON(offsetof(struct compat_ethtool_rxnfc, fs.m_ext) + + sizeof(compat_rxnfc->fs.m_ext) != + offsetof(struct ethtool_rxnfc, fs.m_ext) + + sizeof(rxnfc->fs.m_ext)); + BUILD_BUG_ON( + offsetof(struct compat_ethtool_rxnfc, fs.location) - + offsetof(struct compat_ethtool_rxnfc, fs.ring_cookie) != + offsetof(struct ethtool_rxnfc, fs.location) - + offsetof(struct ethtool_rxnfc, fs.ring_cookie)); + + if (copy_in_user(rxnfc, compat_rxnfc, + (void __user *)(&rxnfc->fs.m_ext + 1) - + (void __user *)rxnfc) || + copy_in_user(&rxnfc->fs.ring_cookie, + &compat_rxnfc->fs.ring_cookie, + (void __user *)(&rxnfc->fs.location + 1) - + (void __user *)&rxnfc->fs.ring_cookie) || + copy_in_user(&rxnfc->rule_cnt, &compat_rxnfc->rule_cnt, + sizeof(rxnfc->rule_cnt))) + return -EFAULT; + } + + ret = dev_ioctl(net, SIOCETHTOOL, ifr); + if (ret) + return ret; + + if (convert_out) { + if (copy_in_user(compat_rxnfc, rxnfc, + (const void __user *)(&rxnfc->fs.m_ext + 1) - + (const void __user *)rxnfc) || + copy_in_user(&compat_rxnfc->fs.ring_cookie, + &rxnfc->fs.ring_cookie, + (const void __user *)(&rxnfc->fs.location + 1) - + (const void __user *)&rxnfc->fs.ring_cookie) || + copy_in_user(&compat_rxnfc->rule_cnt, &rxnfc->rule_cnt, + sizeof(rxnfc->rule_cnt))) + return -EFAULT; + + if (ethcmd == ETHTOOL_GRXCLSRLALL) { + /* As an optimisation, we only copy the actual + * number of rules that the underlying + * function returned. Since Mallory might + * change the rule count in user memory, we + * check that it is less than the rule count + * originally given (as the user buffer size), + * which has been range-checked. + */ + if (get_user(actual_rule_cnt, &rxnfc->rule_cnt)) + return -EFAULT; + if (actual_rule_cnt < rule_cnt) + rule_cnt = actual_rule_cnt; + if (copy_in_user(&compat_rxnfc->rule_locs[0], + &rxnfc->rule_locs[0], + rule_cnt * sizeof(u32))) + return -EFAULT; + } + } + + return 0; +} + +static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) +{ + void __user *uptr; + compat_uptr_t uptr32; + struct ifreq __user *uifr; + + uifr = compat_alloc_user_space(sizeof(*uifr)); + if (copy_in_user(uifr, 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; + + 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; + } +} + +/* 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; + u32 data32; + + if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), + IFNAMSIZ)) + return -EFAULT; + if (get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) + return -EFAULT; + data64 = 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; +} + +static int compat_sioc_ifmap(struct net *net, unsigned int cmd, + struct compat_ifreq __user *uifr32) +{ + struct ifreq ifr; + struct compat_ifmap __user *uifmap32; + mm_segment_t old_fs; + int err; + + uifmap32 = &uifr32->ifr_ifru.ifru_map; + err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); + err |= get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); + err |= get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); + err |= get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); + err |= get_user(ifr.ifr_map.irq, &uifmap32->irq); + err |= get_user(ifr.ifr_map.dma, &uifmap32->dma); + err |= get_user(ifr.ifr_map.port, &uifmap32->port); + 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); + + if (cmd == SIOCGIFMAP && !err) { + err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); + err |= put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); + err |= put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); + err |= put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); + err |= put_user(ifr.ifr_map.irq, &uifmap32->irq); + err |= put_user(ifr.ifr_map.dma, &uifmap32->dma); + err |= put_user(ifr.ifr_map.port, &uifmap32->port); + if (err) + err = -EFAULT; + } + return err; +} + +struct rtentry32 { + u32 rt_pad1; + struct sockaddr rt_dst; /* target address */ + struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ + struct sockaddr rt_genmask; /* target network mask (IP) */ + unsigned short rt_flags; + short rt_pad2; + u32 rt_pad3; + unsigned char rt_tos; + unsigned char rt_class; + short rt_pad4; + short rt_metric; /* +1 for binary compatibility! */ + /* char * */ u32 rt_dev; /* forcing the device at add */ + u32 rt_mtu; /* per route MTU/Window */ + u32 rt_window; /* Window clamping */ + unsigned short rt_irtt; /* Initial RTT */ +}; + +struct in6_rtmsg32 { + struct in6_addr rtmsg_dst; + struct in6_addr rtmsg_src; + struct in6_addr rtmsg_gateway; + u32 rtmsg_type; + u16 rtmsg_dst_len; + u16 rtmsg_src_len; + u32 rtmsg_metric; + u32 rtmsg_info; + u32 rtmsg_flags; + s32 rtmsg_ifindex; +}; + +static int routing_ioctl(struct net *net, struct socket *sock, + unsigned int cmd, void __user *argp) +{ + int ret; + void *r = NULL; + struct in6_rtmsg r6; + struct rtentry r4; + char devname[16]; + u32 rtdev; + mm_segment_t old_fs = get_fs(); + + if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ + struct in6_rtmsg32 __user *ur6 = argp; + ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), + 3 * sizeof(struct in6_addr)); + ret |= get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); + ret |= get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); + ret |= get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); + ret |= get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); + ret |= get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); + ret |= get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); + ret |= get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); + + r = (void *) &r6; + } else { /* ipv4 */ + struct rtentry32 __user *ur4 = argp; + ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), + 3 * sizeof(struct sockaddr)); + ret |= get_user(r4.rt_flags, &(ur4->rt_flags)); + ret |= get_user(r4.rt_metric, &(ur4->rt_metric)); + ret |= get_user(r4.rt_mtu, &(ur4->rt_mtu)); + ret |= get_user(r4.rt_window, &(ur4->rt_window)); + ret |= get_user(r4.rt_irtt, &(ur4->rt_irtt)); + ret |= get_user(rtdev, &(ur4->rt_dev)); + if (rtdev) { + ret |= copy_from_user(devname, compat_ptr(rtdev), 15); + r4.rt_dev = (char __user __force *)devname; + devname[15] = 0; + } else + r4.rt_dev = NULL; + + r = (void *) &r4; + } + + if (ret) { + ret = -EFAULT; + goto out; + } + + set_fs(KERNEL_DS); + ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); + set_fs(old_fs); + +out: + return ret; +} + +/* Since old style bridge ioctl's endup using SIOCDEVPRIVATE + * for some operations; this forces use of the newer bridge-utils that + * use compatible ioctls + */ +static int old_bridge_ioctl(compat_ulong_t __user *argp) +{ + compat_ulong_t tmp; + + if (get_user(tmp, argp)) + return -EFAULT; + if (tmp == BRCTL_GET_VERSION) + return BRCTL_VERSION + 1; + return -EINVAL; +} + +static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, + unsigned int cmd, unsigned long arg) +{ + void __user *argp = compat_ptr(arg); + struct sock *sk = sock->sk; + struct net *net = sock_net(sk); + + if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) + return compat_ifr_data_ioctl(net, cmd, argp); + + switch (cmd) { + case SIOCSIFBR: + case SIOCGIFBR: + return old_bridge_ioctl(argp); + case SIOCGIFNAME: + return dev_ifname32(net, argp); + case SIOCGIFCONF: + return dev_ifconf(net, argp); + case SIOCETHTOOL: + return ethtool_ioctl(net, argp); + case SIOCWANDEV: + return compat_siocwandev(net, argp); + 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); + case SIOCGSTAMP: + return do_siocgstamp(net, sock, cmd, argp); + case SIOCGSTAMPNS: + return do_siocgstampns(net, sock, cmd, argp); + case SIOCBONDSLAVEINFOQUERY: + case SIOCBONDINFOQUERY: + case SIOCSHWTSTAMP: + case SIOCGHWTSTAMP: + return compat_ifr_data_ioctl(net, cmd, argp); + + case FIOSETOWN: + case SIOCSPGRP: + case FIOGETOWN: + case SIOCGPGRP: + case SIOCBRADDBR: + case SIOCBRDELBR: + case SIOCGIFVLAN: + case SIOCSIFVLAN: + case SIOCADDDLCI: + case SIOCDELDLCI: + return sock_ioctl(file, cmd, arg); + + case SIOCGIFFLAGS: + case SIOCSIFFLAGS: + case SIOCGIFMETRIC: + case SIOCSIFMETRIC: + case SIOCGIFMTU: + case SIOCSIFMTU: + case SIOCGIFMEM: + case SIOCSIFMEM: + case SIOCGIFHWADDR: + case SIOCSIFHWADDR: + case SIOCADDMULTI: + case SIOCDELMULTI: + case SIOCGIFINDEX: + case SIOCGIFADDR: + case SIOCSIFADDR: + case SIOCSIFHWBROADCAST: + case SIOCDIFADDR: + case SIOCGIFBRDADDR: + case SIOCSIFBRDADDR: + case SIOCGIFDSTADDR: + case SIOCSIFDSTADDR: + case SIOCGIFNETMASK: + case SIOCSIFNETMASK: + case SIOCSIFPFLAGS: + case SIOCGIFPFLAGS: + case SIOCGIFTXQLEN: + case SIOCSIFTXQLEN: + case SIOCBRADDIF: + case SIOCBRDELIF: + case SIOCSIFNAME: + case SIOCGMIIPHY: + case SIOCGMIIREG: + case SIOCSMIIREG: + return dev_ifsioc(net, sock, cmd, argp); + + case SIOCSARP: + case SIOCGARP: + case SIOCDARP: + case SIOCATMARK: + return sock_do_ioctl(net, sock, cmd, arg); + } + + return -ENOIOCTLCMD; +} + +static long compat_sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg) { struct socket *sock = file->private_data; int ret = -ENOIOCTLCMD; + struct sock *sk; + struct net *net; + + sk = sock->sk; + net = sock_net(sk); if (sock->ops->compat_ioctl) ret = sock->ops->compat_ioctl(sock, cmd, arg); + if (ret == -ENOIOCTLCMD && + (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) + ret = compat_wext_handle_ioctl(net, cmd, arg); + + if (ret == -ENOIOCTLCMD) + ret = compat_sock_ioctl_trans(file, sock, cmd, arg); + return ret; } #endif @@ -2222,11 +3340,13 @@ int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) { return sock->ops->bind(sock, addr, addrlen); } +EXPORT_SYMBOL(kernel_bind); int kernel_listen(struct socket *sock, int backlog) { return sock->ops->listen(sock, backlog); } +EXPORT_SYMBOL(kernel_listen); int kernel_accept(struct socket *sock, struct socket **newsock, int flags) { @@ -2246,60 +3366,75 @@ int kernel_accept(struct socket *sock, struct socket **newsock, int flags) } (*newsock)->ops = sock->ops; + __module_get((*newsock)->ops->owner); done: return err; } +EXPORT_SYMBOL(kernel_accept); int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, int flags) { return sock->ops->connect(sock, addr, addrlen, flags); } +EXPORT_SYMBOL(kernel_connect); int kernel_getsockname(struct socket *sock, struct sockaddr *addr, int *addrlen) { return sock->ops->getname(sock, addr, addrlen, 0); } +EXPORT_SYMBOL(kernel_getsockname); int kernel_getpeername(struct socket *sock, struct sockaddr *addr, int *addrlen) { return sock->ops->getname(sock, addr, addrlen, 1); } +EXPORT_SYMBOL(kernel_getpeername); int kernel_getsockopt(struct socket *sock, int level, int optname, char *optval, int *optlen) { mm_segment_t oldfs = get_fs(); + char __user *uoptval; + int __user *uoptlen; int err; + uoptval = (char __user __force *) optval; + uoptlen = (int __user __force *) optlen; + set_fs(KERNEL_DS); if (level == SOL_SOCKET) - err = sock_getsockopt(sock, level, optname, optval, optlen); + err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); else - err = sock->ops->getsockopt(sock, level, optname, optval, - optlen); + err = sock->ops->getsockopt(sock, level, optname, uoptval, + uoptlen); set_fs(oldfs); return err; } +EXPORT_SYMBOL(kernel_getsockopt); int kernel_setsockopt(struct socket *sock, int level, int optname, - char *optval, int optlen) + char *optval, unsigned int optlen) { mm_segment_t oldfs = get_fs(); + char __user *uoptval; int err; + uoptval = (char __user __force *) optval; + set_fs(KERNEL_DS); if (level == SOL_SOCKET) - err = sock_setsockopt(sock, level, optname, optval, optlen); + err = sock_setsockopt(sock, level, optname, uoptval, optlen); else - err = sock->ops->setsockopt(sock, level, optname, optval, + err = sock->ops->setsockopt(sock, level, optname, uoptval, optlen); set_fs(oldfs); return err; } +EXPORT_SYMBOL(kernel_setsockopt); int kernel_sendpage(struct socket *sock, struct page *page, int offset, size_t size, int flags) @@ -2309,6 +3444,7 @@ int kernel_sendpage(struct socket *sock, struct page *page, int offset, return sock_no_sendpage(sock, page, offset, size, flags); } +EXPORT_SYMBOL(kernel_sendpage); int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) { @@ -2321,36 +3457,10 @@ int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) 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); } - -/* ABI emulation layers need these two */ -EXPORT_SYMBOL(move_addr_to_kernel); -EXPORT_SYMBOL(move_addr_to_user); -EXPORT_SYMBOL(sock_create); -EXPORT_SYMBOL(sock_create_kern); -EXPORT_SYMBOL(sock_create_lite); -EXPORT_SYMBOL(sock_map_fd); -EXPORT_SYMBOL(sock_recvmsg); -EXPORT_SYMBOL(sock_register); -EXPORT_SYMBOL(sock_release); -EXPORT_SYMBOL(sock_sendmsg); -EXPORT_SYMBOL(sock_unregister); -EXPORT_SYMBOL(sock_wake_async); -EXPORT_SYMBOL(sockfd_lookup); -EXPORT_SYMBOL(kernel_sendmsg); -EXPORT_SYMBOL(kernel_recvmsg); -EXPORT_SYMBOL(kernel_bind); -EXPORT_SYMBOL(kernel_listen); -EXPORT_SYMBOL(kernel_accept); -EXPORT_SYMBOL(kernel_connect); -EXPORT_SYMBOL(kernel_getsockname); -EXPORT_SYMBOL(kernel_getpeername); -EXPORT_SYMBOL(kernel_getsockopt); -EXPORT_SYMBOL(kernel_setsockopt); -EXPORT_SYMBOL(kernel_sendpage); -EXPORT_SYMBOL(kernel_sock_ioctl); EXPORT_SYMBOL(kernel_sock_shutdown); |