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author | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 17:59:44 -0400 |
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committer | Trond Myklebust <Trond.Myklebust@netapp.com> | 2008-03-19 17:59:44 -0400 |
commit | c7c350e92aab1bba68f26a6027b734adcf9824ba (patch) | |
tree | aa99bd94c3049dd871d9c030d70a5f3d87591a95 /fs/proc/proc_net.c | |
parent | 2f42b5d043ee271d1e5d30ecd77186b6c4d4e534 (diff) | |
parent | f8512ad0da16cbe156f3a7627971cdf0b39c4138 (diff) | |
download | linux-c7c350e92aab1bba68f26a6027b734adcf9824ba.tar.bz2 |
Merge branch 'hotfixes' into devel
Diffstat (limited to 'fs/proc/proc_net.c')
-rw-r--r-- | fs/proc/proc_net.c | 117 |
1 files changed, 89 insertions, 28 deletions
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c index 14e9b5aaf863..4caa5f774fb7 100644 --- a/fs/proc/proc_net.c +++ b/fs/proc/proc_net.c @@ -63,6 +63,82 @@ int seq_release_net(struct inode *ino, struct file *f) } EXPORT_SYMBOL_GPL(seq_release_net); +static struct net *get_proc_task_net(struct inode *dir) +{ + struct task_struct *task; + struct nsproxy *ns; + struct net *net = NULL; + + rcu_read_lock(); + task = pid_task(proc_pid(dir), PIDTYPE_PID); + if (task != NULL) { + ns = task_nsproxy(task); + if (ns != NULL) + net = get_net(ns->net_ns); + } + rcu_read_unlock(); + + return net; +} + +static struct dentry *proc_tgid_net_lookup(struct inode *dir, + struct dentry *dentry, struct nameidata *nd) +{ + struct dentry *de; + struct net *net; + + de = ERR_PTR(-ENOENT); + net = get_proc_task_net(dir); + if (net != NULL) { + de = proc_lookup_de(net->proc_net, dir, dentry); + put_net(net); + } + return de; +} + +static int proc_tgid_net_getattr(struct vfsmount *mnt, struct dentry *dentry, + struct kstat *stat) +{ + struct inode *inode = dentry->d_inode; + struct net *net; + + net = get_proc_task_net(inode); + + generic_fillattr(inode, stat); + + if (net != NULL) { + stat->nlink = net->proc_net->nlink; + put_net(net); + } + + return 0; +} + +const struct inode_operations proc_net_inode_operations = { + .lookup = proc_tgid_net_lookup, + .getattr = proc_tgid_net_getattr, +}; + +static int proc_tgid_net_readdir(struct file *filp, void *dirent, + filldir_t filldir) +{ + int ret; + struct net *net; + + ret = -EINVAL; + net = get_proc_task_net(filp->f_path.dentry->d_inode); + if (net != NULL) { + ret = proc_readdir_de(net->proc_net, filp, dirent, filldir); + put_net(net); + } + return ret; +} + +const struct file_operations proc_net_operations = { + .read = generic_read_dir, + .readdir = proc_tgid_net_readdir, +}; + struct proc_dir_entry *proc_net_fops_create(struct net *net, const char *name, mode_t mode, const struct file_operations *fops) @@ -83,14 +159,6 @@ struct net *get_proc_net(const struct inode *inode) } EXPORT_SYMBOL_GPL(get_proc_net); -static struct proc_dir_entry *shadow_pde; - -static struct proc_dir_entry *proc_net_shadow(struct task_struct *task, - struct proc_dir_entry *de) -{ - return task->nsproxy->net_ns->proc_net; -} - struct proc_dir_entry *proc_net_mkdir(struct net *net, const char *name, struct proc_dir_entry *parent) { @@ -104,45 +172,39 @@ EXPORT_SYMBOL_GPL(proc_net_mkdir); static __net_init int proc_net_ns_init(struct net *net) { - struct proc_dir_entry *root, *netd, *net_statd; + struct proc_dir_entry *netd, *net_statd; int err; err = -ENOMEM; - root = kzalloc(sizeof(*root), GFP_KERNEL); - if (!root) + netd = kzalloc(sizeof(*netd), GFP_KERNEL); + if (!netd) goto out; - err = -EEXIST; - netd = proc_net_mkdir(net, "net", root); - if (!netd) - goto free_root; + netd->data = net; + netd->nlink = 2; + netd->name = "net"; + netd->namelen = 3; + netd->parent = &proc_root; err = -EEXIST; net_statd = proc_net_mkdir(net, "stat", netd); if (!net_statd) goto free_net; - root->data = net; - - net->proc_net_root = root; net->proc_net = netd; net->proc_net_stat = net_statd; - err = 0; + return 0; +free_net: + kfree(netd); out: return err; -free_net: - remove_proc_entry("net", root); -free_root: - kfree(root); - goto out; } static __net_exit void proc_net_ns_exit(struct net *net) { remove_proc_entry("stat", net->proc_net); - remove_proc_entry("net", net->proc_net_root); - kfree(net->proc_net_root); + kfree(net->proc_net); } static struct pernet_operations __net_initdata proc_net_ns_ops = { @@ -152,8 +214,7 @@ static struct pernet_operations __net_initdata proc_net_ns_ops = { int __init proc_net_init(void) { - shadow_pde = proc_mkdir("net", NULL); - shadow_pde->shadow_proc = proc_net_shadow; + proc_symlink("net", NULL, "self/net"); return register_pernet_subsys(&proc_net_ns_ops); } |