fuse: get rid of fc->flags

Only two flags: "default_permissions" and "allow_other".  All other flags
are handled via bitfields.  So convert these two as well.  They don't
change during the lifetime of the filesystem, so this is quite safe.
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>

fs/fuse/dir.c

@@ -1028,7 +1028,7 @@ int fuse_allow_current_process(struct fuse_conn *fc)
 {
 	const struct cred *cred;
 
-	if (fc->flags & FUSE_ALLOW_OTHER)
+	if (fc->allow_other)
 		return 1;
 
 	cred = current_cred();
@@ -1104,7 +1104,7 @@ static int fuse_permission(struct inode *inode, int mask)
 	/*
 	 * If attributes are needed, refresh them before proceeding
 	 */
-	if ((fc->flags & FUSE_DEFAULT_PERMISSIONS) ||
+	if (fc->default_permissions ||
 	    ((mask & MAY_EXEC) && S_ISREG(inode->i_mode))) {
 		struct fuse_inode *fi = get_fuse_inode(inode);
 
@@ -1117,7 +1117,7 @@ static int fuse_permission(struct inode *inode, int mask)
 		}
 	}
 
-	if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
+	if (fc->default_permissions) {
 		err = generic_permission(inode, mask);
 
 		/* If permission is denied, try to refresh file
@@ -1618,7 +1618,7 @@ int fuse_do_setattr(struct inode *inode, struct iattr *attr,
 	int err;
 	bool trust_local_cmtime = is_wb && S_ISREG(inode->i_mode);
 
-	if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
+	if (!fc->default_permissions)
 		attr->ia_valid |= ATTR_FORCE;
 
 	err = inode_change_ok(inode, attr);

fs/fuse/fuse_i.h

@@ -37,15 +37,6 @@
 /** Number of dentries for each connection in the control filesystem */
 #define FUSE_CTL_NUM_DENTRIES 5
 
-/** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem
-    module will check permissions based on the file mode.  Otherwise no
-    permission checking is done in the kernel */
-#define FUSE_DEFAULT_PERMISSIONS (1 << 0)
-
-/** If the FUSE_ALLOW_OTHER flag is given, then not only the user
-    doing the mount will be allowed to access the filesystem */
-#define FUSE_ALLOW_OTHER         (1 << 1)
-
 /** Number of page pointers embedded in fuse_req */
 #define FUSE_REQ_INLINE_PAGES 1
 
@@ -470,9 +461,6 @@ struct fuse_conn {
 	/** The group id for this mount */
 	kgid_t group_id;
 
-	/** The fuse mount flags for this mount */
-	unsigned flags;
-
 	/** Maximum read size */
 	unsigned max_read;
 
@@ -631,6 +619,12 @@ struct fuse_conn {
 	/** Does the filesystem support posix acls? */
 	unsigned posix_acl:1;
 
+	/** Check permissions based on the file mode or not? */
+	unsigned default_permissions:1;
+
+	/** Allow other than the mounter user to access the filesystem ? */
+	unsigned allow_other:1;
+
 	/** The number of requests waiting for completion */
 	atomic_t num_waiting;
 

fs/fuse/inode.c

@@ -67,7 +67,8 @@ struct fuse_mount_data {
 	unsigned rootmode_present:1;
 	unsigned user_id_present:1;
 	unsigned group_id_present:1;
-	unsigned flags;
+	unsigned default_permissions:1;
+	unsigned allow_other:1;
 	unsigned max_read;
 	unsigned blksize;
 };
@@ -193,7 +194,7 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
 	 * check in may_delete().
 	 */
 	fi->orig_i_mode = inode->i_mode;
-	if (!(fc->flags & FUSE_DEFAULT_PERMISSIONS))
+	if (!fc->default_permissions)
 		inode->i_mode &= ~S_ISVTX;
 
 	fi->orig_ino = attr->ino;
@@ -534,11 +535,11 @@ static int parse_fuse_opt(char *opt, struct fuse_mount_data *d, int is_bdev)
 			break;
 
 		case OPT_DEFAULT_PERMISSIONS:
-			d->flags |= FUSE_DEFAULT_PERMISSIONS;
+			d->default_permissions = 1;
 			break;
 
 		case OPT_ALLOW_OTHER:
-			d->flags |= FUSE_ALLOW_OTHER;
+			d->allow_other = 1;
 			break;
 
 		case OPT_MAX_READ:
@@ -572,9 +573,9 @@ static int fuse_show_options(struct seq_file *m, struct dentry *root)
 
 	seq_printf(m, ",user_id=%u", from_kuid_munged(&init_user_ns, fc->user_id));
 	seq_printf(m, ",group_id=%u", from_kgid_munged(&init_user_ns, fc->group_id));
-	if (fc->flags & FUSE_DEFAULT_PERMISSIONS)
+	if (fc->default_permissions)
 		seq_puts(m, ",default_permissions");
-	if (fc->flags & FUSE_ALLOW_OTHER)
+	if (fc->allow_other)
 		seq_puts(m, ",allow_other");
 	if (fc->max_read != ~0)
 		seq_printf(m, ",max_read=%u", fc->max_read);
@@ -917,7 +918,7 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
 			if (arg->time_gran && arg->time_gran <= 1000000000)
 				fc->sb->s_time_gran = arg->time_gran;
 			if ((arg->flags & FUSE_POSIX_ACL)) {
-				fc->flags |= FUSE_DEFAULT_PERMISSIONS;
+				fc->default_permissions = 1;
 				fc->posix_acl = 1;
 				fc->sb->s_xattr = fuse_acl_xattr_handlers;
 			}
@@ -1119,7 +1120,8 @@ static int fuse_fill_super(struct super_block *sb, void *data, int silent)
 		fc->dont_mask = 1;
 	sb->s_flags |= MS_POSIXACL;
 
-	fc->flags = d.flags;
+	fc->default_permissions = d.default_permissions;
+	fc->allow_other = d.allow_other;
 	fc->user_id = d.user_id;
 	fc->group_id = d.group_id;
 	fc->max_read = max_t(unsigned, 4096, d.max_read);