[NET]: use fget_light() in net/socket.c
Here's an updated copy of the patch to use fget_light in net/socket.c. Rerunning the tests show a drop of ~80Mbit/s on average, which looks bad until you see the drop in cpu usage from ~89% to ~82%. That will get fixed in another patch... Before: max 8113.70, min 8026.32, avg 8072.34 87380 16384 16384 10.01 8045.55 87.11 87.11 1.774 1.774 87380 16384 16384 10.01 8065.14 90.86 90.86 1.846 1.846 87380 16384 16384 10.00 8077.76 89.85 89.85 1.822 1.822 87380 16384 16384 10.00 8026.32 89.80 89.80 1.833 1.833 87380 16384 16384 10.01 8108.59 89.81 89.81 1.815 1.815 87380 16384 16384 10.01 8034.53 89.01 89.01 1.815 1.815 87380 16384 16384 10.00 8113.70 90.45 90.45 1.827 1.827 87380 16384 16384 10.00 8111.37 89.90 89.90 1.816 1.816 87380 16384 16384 10.01 8077.75 87.96 87.96 1.784 1.784 87380 16384 16384 10.00 8062.70 90.25 90.25 1.834 1.834 After: max 8035.81, min 7963.69, avg 7998.14 87380 16384 16384 10.01 8000.93 82.11 82.11 1.682 1.682 87380 16384 16384 10.01 8016.17 83.67 83.67 1.710 1.710 87380 16384 16384 10.01 7963.69 83.47 83.47 1.717 1.717 87380 16384 16384 10.01 8014.35 81.71 81.71 1.671 1.671 87380 16384 16384 10.00 7967.68 83.41 83.41 1.715 1.715 87380 16384 16384 10.00 7995.22 81.00 81.00 1.660 1.660 87380 16384 16384 10.00 8002.61 83.90 83.90 1.718 1.718 87380 16384 16384 10.00 8035.81 81.71 81.71 1.666 1.666 87380 16384 16384 10.01 8005.36 82.56 82.56 1.690 1.690 87380 16384 16384 10.00 7979.61 82.50 82.50 1.694 1.694 Signed-off-by: Benjamin LaHaise <bcrl@linux.intel.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Benjamin LaHaise
David S. Miller
parent
8aca8a27d9
commit
6cb153cab9
192
net/socket.c
192
net/socket.c
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@ -426,6 +426,28 @@ int sock_map_fd(struct socket *sock)
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return fd;
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}
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static struct socket *sock_from_file(struct file *file, int *err)
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{
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struct inode *inode;
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struct socket *sock;
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if (file->f_op == &socket_file_ops)
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return file->private_data; /* set in sock_map_fd */
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inode = file->f_dentry->d_inode;
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if (!S_ISSOCK(inode->i_mode)) {
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*err = -ENOTSOCK;
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return NULL;
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}
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sock = SOCKET_I(inode);
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if (sock->file != file) {
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printk(KERN_ERR "socki_lookup: socket file changed!\n");
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sock->file = file;
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}
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return sock;
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}
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/**
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* sockfd_lookup - Go from a file number to its socket slot
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* @fd: file handle
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@ -442,33 +464,33 @@ int sock_map_fd(struct socket *sock)
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struct socket *sockfd_lookup(int fd, int *err)
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{
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struct file *file;
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struct inode *inode;
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struct socket *sock;
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if (!(file = fget(fd)))
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{
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if (!(file = fget(fd))) {
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*err = -EBADF;
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return NULL;
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}
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if (file->f_op == &socket_file_ops)
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return file->private_data; /* set in sock_map_fd */
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inode = file->f_dentry->d_inode;
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if (!S_ISSOCK(inode->i_mode)) {
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*err = -ENOTSOCK;
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sock = sock_from_file(file, err);
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if (!sock)
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fput(file);
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return NULL;
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}
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sock = SOCKET_I(inode);
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if (sock->file != file) {
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printk(KERN_ERR "socki_lookup: socket file changed!\n");
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sock->file = file;
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}
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return sock;
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}
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static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed)
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{
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struct file *file;
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struct socket *sock;
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file = fget_light(fd, fput_needed);
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if (file) {
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sock = sock_from_file(file, err);
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if (sock)
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return sock;
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fput_light(file, *fput_needed);
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}
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return NULL;
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}
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/**
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* sock_alloc - allocate a socket
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*
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@ -1301,19 +1323,17 @@ asmlinkage long sys_bind(int fd, struct sockaddr __user *umyaddr, int addrlen)
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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int err;
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int err, fput_needed;
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if((sock = sockfd_lookup(fd,&err))!=NULL)
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if((sock = sockfd_lookup_light(fd, &err, &fput_needed))!=NULL)
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{
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if((err=move_addr_to_kernel(umyaddr,addrlen,address))>=0) {
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err = security_socket_bind(sock, (struct sockaddr *)address, addrlen);
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if (err) {
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sockfd_put(sock);
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return err;
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if (!err)
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err = sock->ops->bind(sock,
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(struct sockaddr *)address, addrlen);
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}
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err = sock->ops->bind(sock, (struct sockaddr *)address, addrlen);
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}
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1330,20 +1350,17 @@ int sysctl_somaxconn = SOMAXCONN;
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asmlinkage long sys_listen(int fd, int backlog)
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{
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struct socket *sock;
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int err;
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int err, fput_needed;
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if ((sock = sockfd_lookup(fd, &err)) != NULL) {
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if ((sock = sockfd_lookup_light(fd, &err, &fput_needed)) != NULL) {
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if ((unsigned) backlog > sysctl_somaxconn)
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backlog = sysctl_somaxconn;
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err = security_socket_listen(sock, backlog);
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if (err) {
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sockfd_put(sock);
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return err;
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}
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if (!err)
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err = sock->ops->listen(sock, backlog);
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err=sock->ops->listen(sock, backlog);
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1365,10 +1382,10 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, int _
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{
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struct socket *sock, *newsock;
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struct file *newfile;
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int err, len, newfd;
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int err, len, newfd, fput_needed;
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char address[MAX_SOCK_ADDR];
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sock = sockfd_lookup(fd, &err);
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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@ -1421,7 +1438,7 @@ asmlinkage long sys_accept(int fd, struct sockaddr __user *upeer_sockaddr, int _
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security_socket_post_accept(sock, newsock);
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out_put:
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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out:
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return err;
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out_fd:
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@ -1449,9 +1466,9 @@ asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, int addrl
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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int err;
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int err, fput_needed;
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sock = sockfd_lookup(fd, &err);
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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err = move_addr_to_kernel(uservaddr, addrlen, address);
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@ -1465,7 +1482,7 @@ asmlinkage long sys_connect(int fd, struct sockaddr __user *uservaddr, int addrl
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err = sock->ops->connect(sock, (struct sockaddr *) address, addrlen,
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sock->file->f_flags);
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out_put:
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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out:
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return err;
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}
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@ -1479,9 +1496,9 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, int _
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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int len, err;
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int len, err, fput_needed;
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sock = sockfd_lookup(fd, &err);
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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@ -1495,7 +1512,7 @@ asmlinkage long sys_getsockname(int fd, struct sockaddr __user *usockaddr, int _
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err = move_addr_to_user(address, len, usockaddr, usockaddr_len);
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out_put:
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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out:
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return err;
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}
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@ -1509,20 +1526,19 @@ asmlinkage long sys_getpeername(int fd, struct sockaddr __user *usockaddr, int _
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{
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struct socket *sock;
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char address[MAX_SOCK_ADDR];
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int len, err;
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int len, err, fput_needed;
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if ((sock = sockfd_lookup(fd, &err))!=NULL)
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{
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if ((sock = sockfd_lookup_light(fd, &err, &fput_needed)) != NULL) {
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err = security_socket_getpeername(sock);
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if (err) {
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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return err;
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}
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err = sock->ops->getname(sock, (struct sockaddr *)address, &len, 1);
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if (!err)
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err=move_addr_to_user(address,len, usockaddr, usockaddr_len);
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1541,10 +1557,16 @@ asmlinkage long sys_sendto(int fd, void __user * buff, size_t len, unsigned flag
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int err;
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struct msghdr msg;
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struct iovec iov;
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int fput_needed;
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struct file *sock_file;
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sock = sockfd_lookup(fd, &err);
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sock_file = fget_light(fd, &fput_needed);
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if (!sock_file)
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return -EBADF;
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sock = sock_from_file(sock_file, &err);
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if (!sock)
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goto out;
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goto out_put;
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iov.iov_base=buff;
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iov.iov_len=len;
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msg.msg_name=NULL;
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@ -1553,8 +1575,7 @@ asmlinkage long sys_sendto(int fd, void __user * buff, size_t len, unsigned flag
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msg.msg_control=NULL;
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msg.msg_controllen=0;
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msg.msg_namelen=0;
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if(addr)
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{
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if (addr) {
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err = move_addr_to_kernel(addr, addr_len, address);
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if (err < 0)
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goto out_put;
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@ -1567,8 +1588,7 @@ asmlinkage long sys_sendto(int fd, void __user * buff, size_t len, unsigned flag
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err = sock_sendmsg(sock, &msg, len);
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out_put:
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sockfd_put(sock);
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out:
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fput_light(sock_file, fput_needed);
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return err;
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}
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@ -1595,8 +1615,14 @@ asmlinkage long sys_recvfrom(int fd, void __user * ubuf, size_t size, unsigned f
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struct msghdr msg;
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char address[MAX_SOCK_ADDR];
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int err,err2;
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struct file *sock_file;
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int fput_needed;
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sock = sockfd_lookup(fd, &err);
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sock_file = fget_light(fd, &fput_needed);
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if (!sock_file)
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return -EBADF;
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sock = sock_from_file(sock_file, &err);
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if (!sock)
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goto out;
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@ -1618,8 +1644,8 @@ asmlinkage long sys_recvfrom(int fd, void __user * ubuf, size_t size, unsigned f
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if(err2<0)
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err=err2;
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}
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sockfd_put(sock);
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out:
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fput_light(sock_file, fput_needed);
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return err;
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}
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@ -1639,25 +1665,24 @@ asmlinkage long sys_recv(int fd, void __user * ubuf, size_t size, unsigned flags
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asmlinkage long sys_setsockopt(int fd, int level, int optname, char __user *optval, int optlen)
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{
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int err;
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int err, fput_needed;
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struct socket *sock;
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if (optlen < 0)
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return -EINVAL;
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if ((sock = sockfd_lookup(fd, &err))!=NULL)
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if ((sock = sockfd_lookup_light(fd, &err, &fput_needed)) != NULL)
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{
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err = security_socket_setsockopt(sock,level,optname);
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if (err) {
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sockfd_put(sock);
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return err;
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}
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if (err)
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goto out_put;
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if (level == SOL_SOCKET)
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err=sock_setsockopt(sock,level,optname,optval,optlen);
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else
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err=sock->ops->setsockopt(sock, level, optname, optval, optlen);
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sockfd_put(sock);
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out_put:
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1669,23 +1694,20 @@ asmlinkage long sys_setsockopt(int fd, int level, int optname, char __user *optv
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asmlinkage long sys_getsockopt(int fd, int level, int optname, char __user *optval, int __user *optlen)
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{
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int err;
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int err, fput_needed;
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struct socket *sock;
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if ((sock = sockfd_lookup(fd, &err))!=NULL)
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{
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err = security_socket_getsockopt(sock, level,
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optname);
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if (err) {
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sockfd_put(sock);
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return err;
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}
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if ((sock = sockfd_lookup_light(fd, &err, &fput_needed)) != NULL) {
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err = security_socket_getsockopt(sock, level, optname);
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if (err)
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goto out_put;
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if (level == SOL_SOCKET)
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err=sock_getsockopt(sock,level,optname,optval,optlen);
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else
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err=sock->ops->getsockopt(sock, level, optname, optval, optlen);
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sockfd_put(sock);
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out_put:
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1697,19 +1719,15 @@ asmlinkage long sys_getsockopt(int fd, int level, int optname, char __user *optv
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asmlinkage long sys_shutdown(int fd, int how)
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{
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int err;
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int err, fput_needed;
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struct socket *sock;
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if ((sock = sockfd_lookup(fd, &err))!=NULL)
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if ((sock = sockfd_lookup_light(fd, &err, &fput_needed))!=NULL)
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{
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err = security_socket_shutdown(sock, how);
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if (err) {
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sockfd_put(sock);
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return err;
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}
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err=sock->ops->shutdown(sock, how);
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sockfd_put(sock);
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if (!err)
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err = sock->ops->shutdown(sock, how);
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fput_light(sock->file, fput_needed);
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}
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return err;
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}
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@ -1738,6 +1756,7 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
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unsigned char *ctl_buf = ctl;
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struct msghdr msg_sys;
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int err, ctl_len, iov_size, total_len;
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int fput_needed;
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err = -EFAULT;
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if (MSG_CMSG_COMPAT & flags) {
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@ -1746,7 +1765,7 @@ asmlinkage long sys_sendmsg(int fd, struct msghdr __user *msg, unsigned flags)
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} else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr)))
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return -EFAULT;
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sock = sockfd_lookup(fd, &err);
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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@ -1814,7 +1833,7 @@ out_freeiov:
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if (iov != iovstack)
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sock_kfree_s(sock->sk, iov, iov_size);
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out_put:
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sockfd_put(sock);
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fput_light(sock->file, fput_needed);
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out:
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return err;
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}
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@ -1832,6 +1851,7 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flag
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struct msghdr msg_sys;
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unsigned long cmsg_ptr;
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int err, iov_size, total_len, len;
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int fput_needed;
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/* kernel mode address */
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char addr[MAX_SOCK_ADDR];
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@ -1847,7 +1867,7 @@ asmlinkage long sys_recvmsg(int fd, struct msghdr __user *msg, unsigned int flag
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if (copy_from_user(&msg_sys,msg,sizeof(struct msghdr)))
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return -EFAULT;
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sock = sockfd_lookup(fd, &err);
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sock = sockfd_lookup_light(fd, &err, &fput_needed);
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if (!sock)
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goto out;
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@ -1914,7 +1934,7 @@ out_freeiov:
|
|||
if (iov != iovstack)
|
||||
sock_kfree_s(sock->sk, iov, iov_size);
|
||||
out_put:
|
||||
sockfd_put(sock);
|
||||
fput_light(sock->file, fput_needed);
|
||||
out:
|
||||
return err;
|
||||
}
|
||||
|
|
|
|||
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Reference in New Issue