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| author | Stephen Rothwell <sfr@canb.auug.org.au> | 2011-05-12 05:51:13 +0200 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2011-05-25 00:30:51 +0200 |
| commit | 956c920786694f51601a0ef7ee12956fd6aa216e (patch) | |
| tree | 3d90cca04df011fbe01bdffb589e941b168ea550 /net | |
| parent | ns proc: Return -ENOENT for a nonexistent /proc/self/ns/ entry. (diff) | |
| download | linux-956c920786694f51601a0ef7ee12956fd6aa216e.tar.xz linux-956c920786694f51601a0ef7ee12956fd6aa216e.zip | |
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 f063052947f7 ("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>
Diffstat (limited to 'net')
| -rw-r--r-- | net/core/net_namespace.c | 49 |
1 files changed, 27 insertions, 22 deletions
diff --git a/net/core/net_namespace.c b/net/core/net_namespace.c index b7403ff4d6c6..d4cf178bdfc7 100644 --- a/net/core/net_namespace.c +++ b/net/core/net_namespace.c @@ -316,6 +316,28 @@ void __put_net(struct net *net) } EXPORT_SYMBOL_GPL(__put_net); +struct net *get_net_ns_by_fd(int fd) +{ + struct proc_inode *ei; + struct file *file; + struct net *net; + + net = ERR_PTR(-EINVAL); + file = proc_ns_fget(fd); + if (!file) + goto out; + + ei = PROC_I(file->f_dentry->d_inode); + if (ei->ns_ops != &netns_operations) + goto out; + + net = get_net(ei->ns); +out: + if (file) + fput(file); + return net; +} + #else struct net *copy_net_ns(unsigned long flags, struct net *old_net) { @@ -323,6 +345,11 @@ struct net *copy_net_ns(unsigned long flags, struct net *old_net) return ERR_PTR(-EINVAL); return old_net; } + +struct net *get_net_ns_by_fd(int fd) +{ + return ERR_PTR(-EINVAL); +} #endif struct net *get_net_ns_by_pid(pid_t pid) @@ -345,28 +372,6 @@ struct net *get_net_ns_by_pid(pid_t pid) } EXPORT_SYMBOL_GPL(get_net_ns_by_pid); -struct net *get_net_ns_by_fd(int fd) -{ - struct proc_inode *ei; - struct file *file; - struct net *net; - - net = ERR_PTR(-EINVAL); - file = proc_ns_fget(fd); - if (!file) - goto out; - - ei = PROC_I(file->f_dentry->d_inode); - if (ei->ns_ops != &netns_operations) - goto out; - - net = get_net(ei->ns); -out: - if (file) - fput(file); - return net; -} - static int __init net_ns_init(void) { struct net_generic *ng; |