autofs4: cleanup autofs mount type usage

Usage of the AUTOFS_TYPE_* defines is a little confusing and appears
inconsistent.

Signed-off-by: Ian Kent <raven@themaw.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/autofs4/autofs_i.h

@@ -21,6 +21,8 @@
 #define AUTOFS_IOC_FIRST     AUTOFS_IOC_READY
 #define AUTOFS_IOC_COUNT     32
 
+#define AUTOFS_TYPE_TRIGGER	(AUTOFS_TYPE_DIRECT|AUTOFS_TYPE_OFFSET)
+
 #include <linux/kernel.h>
 #include <linux/slab.h>
 #include <linux/time.h>
@@ -92,10 +94,6 @@ struct autofs_wait_queue {
 
 #define AUTOFS_SBI_MAGIC 0x6d4a556d
 
-#define AUTOFS_TYPE_INDIRECT     0x0001
-#define AUTOFS_TYPE_DIRECT       0x0002
-#define AUTOFS_TYPE_OFFSET       0x0004
-
 struct autofs_sb_info {
 	u32 magic;
 	int pipefd;

fs/autofs4/expire.c

@@ -479,7 +479,7 @@ int autofs4_expire_multi(struct super_block *sb, struct vfsmount *mnt,
 	if (arg && get_user(do_now, arg))
 		return -EFAULT;
 
-	if (sbi->type & AUTOFS_TYPE_DIRECT)
+	if (sbi->type & AUTOFS_TYPE_TRIGGER)
 		dentry = autofs4_expire_direct(sb, mnt, sbi, do_now);
 	else
 		dentry = autofs4_expire_indirect(sb, mnt, sbi, do_now);

fs/autofs4/inode.c

@@ -288,7 +288,7 @@ static int parse_options(char *options, int *pipefd, uid_t *uid, gid_t *gid,
 			*type = AUTOFS_TYPE_DIRECT;
 			break;
 		case Opt_offset:
-			*type = AUTOFS_TYPE_DIRECT | AUTOFS_TYPE_OFFSET;
+			*type = AUTOFS_TYPE_OFFSET;
 			break;
 		default:
 			return 1;
@@ -336,7 +336,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 	sbi->sb = s;
 	sbi->version = 0;
 	sbi->sub_version = 0;
-	sbi->type = 0;
+	sbi->type = AUTOFS_TYPE_INDIRECT;
 	sbi->min_proto = 0;
 	sbi->max_proto = 0;
 	mutex_init(&sbi->wq_mutex);
@@ -378,7 +378,7 @@ int autofs4_fill_super(struct super_block *s, void *data, int silent)
 	}
 
 	root_inode->i_fop = &autofs4_root_operations;
-	root_inode->i_op = sbi->type & AUTOFS_TYPE_DIRECT ?
+	root_inode->i_op = sbi->type & AUTOFS_TYPE_TRIGGER ?
 			&autofs4_direct_root_inode_operations :
 			&autofs4_indirect_root_inode_operations;
 

fs/autofs4/waitq.c

@@ -337,7 +337,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		 * is very similar for indirect mounts except only dentrys
 		 * in the root of the autofs file system may be negative.
 		 */
-		if (sbi->type & (AUTOFS_TYPE_DIRECT|AUTOFS_TYPE_OFFSET))
+		if (sbi->type & AUTOFS_TYPE_TRIGGER)
 			return -ENOENT;
 		else if (!IS_ROOT(dentry->d_parent))
 			return -ENOENT;
@@ -348,7 +348,7 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 		return -ENOMEM;
 
 	/* If this is a direct mount request create a dummy name */
-	if (IS_ROOT(dentry) && (sbi->type & AUTOFS_TYPE_DIRECT))
+	if (IS_ROOT(dentry) && sbi->type & AUTOFS_TYPE_TRIGGER)
 		qstr.len = sprintf(name, "%p", dentry);
 	else {
 		qstr.len = autofs4_getpath(sbi, dentry, &name);
@@ -406,11 +406,11 @@ int autofs4_wait(struct autofs_sb_info *sbi, struct dentry *dentry,
 				type = autofs_ptype_expire_multi;
 		} else {
 			if (notify == NFY_MOUNT)
-				type = (sbi->type & AUTOFS_TYPE_DIRECT) ?
+				type = (sbi->type & AUTOFS_TYPE_TRIGGER) ?
 					autofs_ptype_missing_direct :
 					 autofs_ptype_missing_indirect;
 			else
-				type = (sbi->type & AUTOFS_TYPE_DIRECT) ?
+				type = (sbi->type & AUTOFS_TYPE_TRIGGER) ?
 					autofs_ptype_expire_direct :
 					autofs_ptype_expire_indirect;
 		}

include/linux/auto_fs4.h

@@ -29,6 +29,11 @@
 #define AUTOFS_EXP_IMMEDIATE		1
 #define AUTOFS_EXP_LEAVES		2
 
+#define AUTOFS_TYPE_ANY			0x0000
+#define AUTOFS_TYPE_INDIRECT		0x0001
+#define AUTOFS_TYPE_DIRECT		0x0002
+#define AUTOFS_TYPE_OFFSET		0x0004
+
 /* Daemon notification packet types */
 enum autofs_notify {
 	NFY_NONE,