[AppArmor 09/41] Add a struct vfsmount parameter to vfs_mknod()

[jjohansen@suse.de]

The vfsmount will be passed down to the LSM hook so that LSMs can compute
pathnames.

Signed-off-by: Tony Jones <tonyj@suse.de>
Signed-off-by: Andreas Gruenbacher <agruen@suse.de>
Signed-off-by: John Johansen <jjohansen@suse.de>

---
 fs/ecryptfs/inode.c |    5 ++++-
 fs/namei.c          |   10 ++++++----
 fs/nfsd/vfs.c       |    3 ++-
 include/linux/fs.h  |    2 +-
 net/unix/af_unix.c  |    2 +-
 5 files changed, 14 insertions(+), 8 deletions(-)

--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -560,11 +560,14 @@ ecryptfs_mknod(struct inode *dir, struct
 {
 	int rc;
 	struct dentry *lower_dentry;
+	struct vfsmount *lower_mnt;
 	struct dentry *lower_dir_dentry;
 
 	lower_dentry = ecryptfs_dentry_to_lower(dentry);
+	lower_mnt = ecryptfs_dentry_to_lower_mnt(dentry);
 	lower_dir_dentry = lock_parent(lower_dentry);
-	rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, mode, dev);
+	rc = vfs_mknod(lower_dir_dentry->d_inode, lower_dentry, lower_mnt, mode,
+		       dev);
 	if (rc || !lower_dentry->d_inode)
 		goto out;
 	rc = ecryptfs_interpose(lower_dentry, dentry, dir->i_sb, 0);
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -1837,7 +1837,8 @@ fail:
 }
 EXPORT_SYMBOL_GPL(lookup_create);
 
-int vfs_mknod(struct inode *dir, struct dentry *dentry, int mode, dev_t dev)
+int vfs_mknod(struct inode *dir, struct dentry *dentry, struct vfsmount *mnt,
+	      int mode, dev_t dev)
 {
 	int error = may_create(dir, dentry, NULL);
 
@@ -1889,11 +1890,12 @@ asmlinkage long sys_mknodat(int dfd, con
 			error = vfs_create(nd.dentry->d_inode,dentry,mode,&nd);
 			break;
 		case S_IFCHR: case S_IFBLK:
-			error = vfs_mknod(nd.dentry->d_inode,dentry,mode,
-					new_decode_dev(dev));
+			error = vfs_mknod(nd.dentry->d_inode, dentry, nd.mnt,
+					  mode, new_decode_dev(dev));
 			break;
 		case S_IFIFO: case S_IFSOCK:
-			error = vfs_mknod(nd.dentry->d_inode,dentry,mode,0);
+			error = vfs_mknod(nd.dentry->d_inode, dentry, nd.mnt,
+					  mode, 0);
 			break;
 		case S_IFDIR:
 			error = -EPERM;
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -1193,7 +1193,8 @@ nfsd_create(struct svc_rqst *rqstp, stru
 	case S_IFBLK:
 	case S_IFIFO:
 	case S_IFSOCK:
-		host_err = vfs_mknod(dirp, dchild, iap->ia_mode, rdev);
+		host_err = vfs_mknod(dirp, dchild, fhp->fh_export->ex_mnt,
+				     iap->ia_mode, rdev);
 		break;
 	default:
 	        printk("nfsd: bad file type %o in nfsd_create\n", type);
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -981,7 +981,7 @@ extern void unlock_super(struct super_bl
 extern int vfs_permission(struct nameidata *, int);
 extern int vfs_create(struct inode *, struct dentry *, int, struct nameidata *);
 extern int vfs_mkdir(struct inode *, struct dentry *, struct vfsmount *, int);
-extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
+extern int vfs_mknod(struct inode *, struct dentry *, struct vfsmount *, int, dev_t);
 extern int vfs_symlink(struct inode *, struct dentry *, const char *, int);
 extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
 extern int vfs_rmdir(struct inode *, struct dentry *);
--- a/net/unix/af_unix.c
+++ b/net/unix/af_unix.c
@@ -808,7 +808,7 @@ static int unix_bind(struct socket *sock
 		 */
 		mode = S_IFSOCK |
 		       (SOCK_INODE(sock)->i_mode & ~current->fs->umask);
-		err = vfs_mknod(nd.dentry->d_inode, dentry, mode, 0);
+		err = vfs_mknod(nd.dentry->d_inode, dentry, nd.mnt, mode, 0);
 		if (err)
 			goto out_mknod_dput;
 		mutex_unlock(&nd.dentry->d_inode->i_mutex);

-- 
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