net: fix get_net_ns_by_fd for !CONFIG_NET_NS
After merging the final tree, today's linux-next build (powerpc
ppc44x_defconfig) failed like this:
net/built-in.o: In function `get_net_ns_by_fd':
(.text+0x11976): undefined reference to `netns_operations'
net/built-in.o: In function `get_net_ns_by_fd':
(.text+0x1197a): undefined reference to `netns_operations'
netns_operations is only available if CONFIG_NET_NS is set ...
Caused by commit f063052947
("net: Allow setting the network namespace
by fd").
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
This commit is contained in:
parent
62ca24baf1
commit
956c920786
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@ -316,6 +316,28 @@ void __put_net(struct net *net)
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}
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EXPORT_SYMBOL_GPL(__put_net);
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struct net *get_net_ns_by_fd(int fd)
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{
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struct proc_inode *ei;
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struct file *file;
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struct net *net;
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net = ERR_PTR(-EINVAL);
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file = proc_ns_fget(fd);
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if (!file)
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goto out;
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ei = PROC_I(file->f_dentry->d_inode);
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if (ei->ns_ops != &netns_operations)
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goto out;
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net = get_net(ei->ns);
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out:
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if (file)
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fput(file);
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return net;
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}
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#else
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struct net *copy_net_ns(unsigned long flags, struct net *old_net)
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{
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@ -323,6 +345,11 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net)
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return ERR_PTR(-EINVAL);
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return old_net;
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}
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struct net *get_net_ns_by_fd(int fd)
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{
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return ERR_PTR(-EINVAL);
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}
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#endif
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struct net *get_net_ns_by_pid(pid_t pid)
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@ -345,28 +372,6 @@ struct net *get_net_ns_by_pid(pid_t pid)
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}
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EXPORT_SYMBOL_GPL(get_net_ns_by_pid);
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struct net *get_net_ns_by_fd(int fd)
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{
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struct proc_inode *ei;
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struct file *file;
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struct net *net;
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net = ERR_PTR(-EINVAL);
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file = proc_ns_fget(fd);
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if (!file)
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goto out;
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ei = PROC_I(file->f_dentry->d_inode);
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if (ei->ns_ops != &netns_operations)
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goto out;
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net = get_net(ei->ns);
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out:
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if (file)
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fput(file);
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return net;
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}
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static int __init net_ns_init(void)
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{
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struct net_generic *ng;
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