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merge sock_alloc_fd/sock_attach_fd into a new helper 

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2009-08-05 19:59:08 +04:00
parent 198de4d7ac
commit 7cbe66b6b5
1 changed files with 23 additions and 57 deletions
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80
net/socket.c
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@ -355,32 +355,30 @@ static const struct dentry_operations sockfs_dentry_operations = {
* but we take care of internal coherence yet.
*/
static int sock_alloc_fd(struct file **filep, int flags)
static int sock_alloc_file(struct socket *sock, struct file **f, int flags)
{
struct qstr name = { .name = "" };
struct dentry *dentry;
struct file *file;
int fd;
fd = get_unused_fd_flags(flags);
if (likely(fd >= 0)) {
struct file *file = get_empty_filp();
if (unlikely(fd < 0))
return fd;
*filep = file;
if (unlikely(!file)) {
put_unused_fd(fd);
return -ENFILE;
}
} else
*filep = NULL;
return fd;
}
file = get_empty_filp();
static int sock_attach_fd(struct socket *sock, struct file *file, int flags)
{
struct dentry *dentry;
struct qstr name = { .name = "" };
if (unlikely(!file)) {
put_unused_fd(fd);
return -ENFILE;
}
dentry = d_alloc(sock_mnt->mnt_sb->s_root, &name);
if (unlikely(!dentry))
if (unlikely(!dentry)) {
put_filp(file);
put_unused_fd(fd);
return -ENOMEM;
}
dentry->d_op = &sockfs_dentry_operations;
/*
@ -399,24 +397,18 @@ static int sock_attach_fd(struct socket *sock, struct file *file, int flags)
file->f_pos = 0;
file->private_data = sock;
return 0;
*f = file;
return fd;
}
int sock_map_fd(struct socket *sock, int flags)
{
struct file *newfile;
int fd = sock_alloc_fd(&newfile, flags);
int fd = sock_alloc_file(sock, &newfile, flags);
if (likely(fd >= 0)) {
int err = sock_attach_fd(sock, newfile, flags);
if (unlikely(err < 0)) {
put_filp(newfile);
put_unused_fd(fd);
return err;
}
if (likely(fd >= 0))
fd_install(fd, newfile);
}
return fd;
}
@ -1390,20 +1382,13 @@ SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
if (err < 0)
goto out_release_both;
fd1 = sock_alloc_fd(&newfile1, flags & O_CLOEXEC);
fd1 = sock_alloc_file(sock1, &newfile1, flags);
if (unlikely(fd1 < 0)) {
err = fd1;
goto out_release_both;
}
err = sock_attach_fd(sock1, newfile1, flags & O_NONBLOCK);
if (unlikely(err < 0)) {
put_filp(newfile1);
put_unused_fd(fd1);
goto out_release_both;
}
fd2 = sock_alloc_fd(&newfile2, flags & O_CLOEXEC);
fd2 = sock_alloc_file(sock2, &newfile2, flags);
if (unlikely(fd2 < 0)) {
err = fd2;
fput(newfile1);
@ -1412,16 +1397,6 @@ SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol,
goto out;
}
err = sock_attach_fd(sock2, newfile2, flags & O_NONBLOCK);
if (unlikely(err < 0)) {
put_filp(newfile2);
put_unused_fd(fd2);
fput(newfile1);
put_unused_fd(fd1);
sock_release(sock2);
goto out;
}
audit_fd_pair(fd1, fd2);
fd_install(fd1, newfile1);
fd_install(fd2, newfile2);
@ -1548,17 +1523,13 @@ SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr,
*/
__module_get(newsock->ops->owner);
newfd = sock_alloc_fd(&newfile, flags & O_CLOEXEC);
newfd = sock_alloc_file(newsock, &newfile, flags);
if (unlikely(newfd < 0)) {
err = newfd;
sock_release(newsock);
goto out_put;
}
err = sock_attach_fd(newsock, newfile, flags & O_NONBLOCK);
if (err < 0)
goto out_fd_simple;
err = security_socket_accept(sock, newsock);
if (err)
goto out_fd;
@ -1588,11 +1559,6 @@ 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);