diff options
Diffstat (limited to 'net/socket.c')
| -rw-r--r-- | net/socket.c | 43 |
1 files changed, 25 insertions, 18 deletions
diff --git a/net/socket.c b/net/socket.c index 6c9b9b326d7..4e396312f8d 100644 --- a/net/socket.c +++ b/net/socket.c @@ -77,7 +77,6 @@ #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> @@ -231,13 +230,13 @@ int move_addr_to_user(void *kaddr, int klen, void __user *uaddr, #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); @@ -258,7 +257,7 @@ static void sock_destroy_inode(struct inode *inode) 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; @@ -306,7 +305,14 @@ static struct file_system_type sock_fs_type = { 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, @@ -354,16 +360,22 @@ static int sock_attach_fd(struct socket *sock, struct file *file) 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; @@ -401,7 +413,7 @@ static struct socket *sock_from_file(struct file *file, int *err) if (file->f_op == &socket_file_ops) return file->private_data; /* set in sock_map_fd */ - inode = file->f_dentry->d_inode; + inode = file->f_path.dentry->d_inode; if (!S_ISSOCK(inode->i_mode)) { *err = -ENOTSOCK; return NULL; @@ -852,11 +864,6 @@ static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) 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; |