#include <linux/cache.h>
#include <linux/module.h>
#include <linux/highmem.h>
-#include <linux/divert.h>
#include <linux/mount.h>
#include <linux/security.h>
#include <linux/syscalls.h>
#define SOCKFS_MAGIC 0x534F434B
-static kmem_cache_t *sock_inode_cachep __read_mostly;
+static struct kmem_cache *sock_inode_cachep __read_mostly;
static struct inode *sock_alloc_inode(struct super_block *sb)
{
struct socket_alloc *ei;
- ei = kmem_cache_alloc(sock_inode_cachep, SLAB_KERNEL);
+ ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL);
if (!ei)
return NULL;
init_waitqueue_head(&ei->socket.wait);
container_of(inode, struct socket_alloc, vfs_inode));
}
-static void init_once(void *foo, kmem_cache_t *cachep, unsigned long flags)
+static void init_once(void *foo, struct kmem_cache *cachep, unsigned long flags)
{
struct socket_alloc *ei = (struct socket_alloc *)foo;
static int sockfs_delete_dentry(struct dentry *dentry)
{
- return 1;
+ /*
+ * At creation time, we pretended this dentry was hashed
+ * (by clearing DCACHE_UNHASHED bit in d_flags)
+ * At delete time, we restore the truth : not hashed.
+ * (so that dput() can proceed correctly)
+ */
+ dentry->d_flags |= DCACHE_UNHASHED;
+ return 0;
}
static struct dentry_operations sockfs_dentry_operations = {
.d_delete = sockfs_delete_dentry,
this.len = sprintf(name, "[%lu]", SOCK_INODE(sock)->i_ino);
this.name = name;
- this.hash = SOCK_INODE(sock)->i_ino;
+ this.hash = 0;
- file->f_dentry = d_alloc(sock_mnt->mnt_sb->s_root, &this);
- if (unlikely(!file->f_dentry))
+ file->f_path.dentry = d_alloc(sock_mnt->mnt_sb->s_root, &this);
+ if (unlikely(!file->f_path.dentry))
return -ENOMEM;
- file->f_dentry->d_op = &sockfs_dentry_operations;
- d_add(file->f_dentry, SOCK_INODE(sock));
- file->f_vfsmnt = mntget(sock_mnt);
- file->f_mapping = file->f_dentry->d_inode->i_mapping;
+ file->f_path.dentry->d_op = &sockfs_dentry_operations;
+ /*
+ * We dont want to push this dentry into global dentry hash table.
+ * We pretend dentry is already hashed, by unsetting DCACHE_UNHASHED
+ * This permits a working /proc/$pid/fd/XXX on sockets
+ */
+ file->f_path.dentry->d_flags &= ~DCACHE_UNHASHED;
+ d_instantiate(file->f_path.dentry, SOCK_INODE(sock));
+ file->f_path.mnt = mntget(sock_mnt);
+ file->f_mapping = file->f_path.dentry->d_inode->i_mapping;
sock->file = file;
file->f_op = SOCK_INODE(sock)->i_fop = &socket_file_ops;
static struct socket *sock_from_file(struct file *file, int *err)
{
- struct inode *inode;
- struct socket *sock;
-
if (file->f_op == &socket_file_ops)
return file->private_data; /* set in sock_map_fd */
- inode = file->f_dentry->d_inode;
- if (!S_ISSOCK(inode->i_mode)) {
- *err = -ENOTSOCK;
- return NULL;
- }
-
- sock = SOCKET_I(inode);
- if (sock->file != file) {
- printk(KERN_ERR "socki_lookup: socket file changed!\n");
- sock->file = file;
- }
- return sock;
+ *err = -ENOTSOCK;
+ return NULL;
}
/**
err = vlan_ioctl_hook(argp);
mutex_unlock(&vlan_ioctl_mutex);
break;
- case SIOCGIFDIVERT:
- case SIOCSIFDIVERT:
- /* Convert this to call through a hook */
- err = divert_ioctl(cmd, argp);
- break;
case SIOCADDDLCI:
case SIOCDELDLCI:
err = -ENOPKG;
struct file *sock_file;
sock_file = fget_light(fd, &fput_needed);
+ err = -EBADF;
if (!sock_file)
- return -EBADF;
+ goto out;
sock = sock_from_file(sock_file, &err);
if (!sock)
out_put:
fput_light(sock_file, fput_needed);
+out:
return err;
}
int fput_needed;
sock_file = fget_light(fd, &fput_needed);
+ err = -EBADF;
if (!sock_file)
- return -EBADF;
+ goto out;
sock = sock_from_file(sock_file, &err);
if (!sock)
- goto out;
+ goto out_put;
msg.msg_control = NULL;
msg.msg_controllen = 0;
if (err2 < 0)
err = err2;
}
-out:
+out_put:
fput_light(sock_file, fput_needed);
+out:
return err;
}