[readdir] convert freevxfs

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

fs/freevxfs/vxfs_lookup.c

@@ -49,7 +49,7 @@
 
 
 static struct dentry *	vxfs_lookup(struct inode *, struct dentry *, unsigned int);
-static int		vxfs_readdir(struct file *, void *, filldir_t);
+static int		vxfs_readdir(struct file *, struct dir_context *);
 
 const struct inode_operations vxfs_dir_inode_ops = {
 	.lookup =		vxfs_lookup,
@@ -58,7 +58,7 @@ const struct inode_operations vxfs_dir_inode_ops = {
 const struct file_operations vxfs_dir_operations = {
 	.llseek =		generic_file_llseek,
 	.read =			generic_read_dir,
-	.readdir =		vxfs_readdir,
+	.iterate =		vxfs_readdir,
 };
 
  
@@ -235,7 +235,7 @@ vxfs_lookup(struct inode *dip, struct dentry *dp, unsigned int flags)
  *   Zero.
  */
 static int
-vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
+vxfs_readdir(struct file *fp, struct dir_context *ctx)
 {
 	struct inode		*ip = file_inode(fp);
 	struct super_block	*sbp = ip->i_sb;
@@ -243,20 +243,17 @@ vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
 	u_long			page, npages, block, pblocks, nblocks, offset;
 	loff_t			pos;
 
-	switch ((long)fp->f_pos) {
-	case 0:
-		if (filler(retp, ".", 1, fp->f_pos, ip->i_ino, DT_DIR) < 0)
-			goto out;
-		fp->f_pos++;
-		/* fallthrough */
-	case 1:
-		if (filler(retp, "..", 2, fp->f_pos, VXFS_INO(ip)->vii_dotdot, DT_DIR) < 0)
-			goto out;
-		fp->f_pos++;
-		/* fallthrough */
+	if (ctx->pos == 0) {
+		if (!dir_emit_dot(fp, ctx))
+			return 0;
+		ctx->pos = 1;
 	}
-
-	pos = fp->f_pos - 2;
+	if (ctx->pos == 1) {
+		if (!dir_emit(ctx, "..", 2, VXFS_INO(ip)->vii_dotdot, DT_DIR))
+			return 0;
+		ctx->pos = 2;
+	}
+	pos = ctx->pos - 2;
 	
 	if (pos > VXFS_DIRROUND(ip->i_size))
 		return 0;
@@ -270,16 +267,16 @@ vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
 	block = (u_long)(pos >> sbp->s_blocksize_bits) % pblocks;
 
 	for (; page < npages; page++, block = 0) {
-		caddr_t			kaddr;
+		char			*kaddr;
 		struct page		*pp;
 
 		pp = vxfs_get_page(ip->i_mapping, page);
 		if (IS_ERR(pp))
 			continue;
-		kaddr = (caddr_t)page_address(pp);
+		kaddr = (char *)page_address(pp);
 
 		for (; block <= nblocks && block <= pblocks; block++) {
-			caddr_t			baddr, limit;
+			char			*baddr, *limit;
 			struct vxfs_dirblk	*dbp;
 			struct vxfs_direct	*de;
 
@@ -292,21 +289,18 @@ vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
 				 (kaddr + offset) :
 				 (baddr + VXFS_DIRBLKOV(dbp)));
 
-			for (; (caddr_t)de <= limit; de = vxfs_next_entry(de)) {
-				int	over;
-
+			for (; (char *)de <= limit; de = vxfs_next_entry(de)) {
 				if (!de->d_reclen)
 					break;
 				if (!de->d_ino)
 					continue;
 
-				offset = (caddr_t)de - kaddr;
-				over = filler(retp, de->d_name, de->d_namelen,
-					((page << PAGE_CACHE_SHIFT) | offset) + 2,
-					de->d_ino, DT_UNKNOWN);
-				if (over) {
+				offset = (char *)de - kaddr;
+				ctx->pos = ((page << PAGE_CACHE_SHIFT) | offset) + 2;
+				if (!dir_emit(ctx, de->d_name, de->d_namelen,
+					de->d_ino, DT_UNKNOWN)) {
 					vxfs_put_page(pp);
-					goto done;
+					return 0;
 				}
 			}
 			offset = 0;
@@ -314,9 +308,6 @@ vxfs_readdir(struct file *fp, void *retp, filldir_t filler)
 		vxfs_put_page(pp);
 		offset = 0;
 	}
-
-done:
-	fp->f_pos = ((page << PAGE_CACHE_SHIFT) | offset) + 2;
-out:
+	ctx->pos = ((page << PAGE_CACHE_SHIFT) | offset) + 2;
 	return 0;
 }