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Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

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This commit is contained in:
David S. Miller 2016-01-06 22:54:18 -05:00
commit 9e0efaf6b4
32 changed files with 173 additions and 134 deletions
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66
net/unix/af_unix.c
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@ -953,32 +953,20 @@ fail:
return NULL;
}
static int unix_mknod(const char *sun_path, umode_t mode, struct path *res)
static int unix_mknod(struct dentry *dentry, struct path *path, umode_t mode,
struct path *res)
{
struct dentry *dentry;
struct path path;
int err = 0;
/*
* Get the parent directory, calculate the hash for last
* component.
*/
dentry = kern_path_create(AT_FDCWD, sun_path, &path, 0);
err = PTR_ERR(dentry);
if (IS_ERR(dentry))
return err;
int err;
/*
* All right, let's create it.
*/
err = security_path_mknod(&path, dentry, mode, 0);
err = security_path_mknod(path, dentry, mode, 0);
if (!err) {
err = vfs_mknod(d_inode(path.dentry), dentry, mode, 0);
err = vfs_mknod(d_inode(path->dentry), dentry, mode, 0);
if (!err) {
res->mnt = mntget(path.mnt);
res->mnt = mntget(path->mnt);
res->dentry = dget(dentry);
}
}
done_path_create(&path, dentry);
return err;
}
@ -989,10 +977,12 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
struct unix_sock *u = unix_sk(sk);
struct sockaddr_un *sunaddr = (struct sockaddr_un *)uaddr;
char *sun_path = sunaddr->sun_path;
int err;
int err, name_err;
unsigned int hash;
struct unix_address *addr;
struct hlist_head *list;
struct path path;
struct dentry *dentry;
err = -EINVAL;
if (sunaddr->sun_family != AF_UNIX)
@ -1008,14 +998,34 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
goto out;
addr_len = err;
name_err = 0;
dentry = NULL;
if (sun_path[0]) {
/* Get the parent directory, calculate the hash for last
* component.
*/
dentry = kern_path_create(AT_FDCWD, sun_path, &path, 0);
if (IS_ERR(dentry)) {
/* delay report until after 'already bound' check */
name_err = PTR_ERR(dentry);
dentry = NULL;
}
}
err = mutex_lock_interruptible(&u->readlock);
if (err)
goto out;
goto out_path;
err = -EINVAL;
if (u->addr)
goto out_up;
if (name_err) {
err = name_err == -EEXIST ? -EADDRINUSE : name_err;
goto out_up;
}
err = -ENOMEM;
addr = kmalloc(sizeof(*addr)+addr_len, GFP_KERNEL);
if (!addr)
@ -1026,11 +1036,11 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
addr->hash = hash ^ sk->sk_type;
atomic_set(&addr->refcnt, 1);
if (sun_path[0]) {
struct path path;
if (dentry) {
struct path u_path;
umode_t mode = S_IFSOCK |
(SOCK_INODE(sock)->i_mode & ~current_umask());
err = unix_mknod(sun_path, mode, &path);
err = unix_mknod(dentry, &path, mode, &u_path);
if (err) {
if (err == -EEXIST)
err = -EADDRINUSE;
@ -1038,9 +1048,9 @@ static int unix_bind(struct socket *sock, struct sockaddr *uaddr, int addr_len)
goto out_up;
}
addr->hash = UNIX_HASH_SIZE;
hash = d_backing_inode(path.dentry)->i_ino & (UNIX_HASH_SIZE-1);
hash = d_backing_inode(dentry)->i_ino & (UNIX_HASH_SIZE - 1);
spin_lock(&unix_table_lock);
u->path = path;
u->path = u_path;
list = &unix_socket_table[hash];
} else {
spin_lock(&unix_table_lock);
@ -1063,6 +1073,10 @@ out_unlock:
spin_unlock(&unix_table_lock);
out_up:
mutex_unlock(&u->readlock);
out_path:
if (dentry)
done_path_create(&path, dentry);
out:
return err;
}