[readdir] convert fuse

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

fs/fuse/dir.c

@@ -14,7 +14,7 @@
 #include <linux/namei.h>
 #include <linux/slab.h>
 
-static bool fuse_use_readdirplus(struct inode *dir, struct file *filp)
+static bool fuse_use_readdirplus(struct inode *dir, struct dir_context *ctx)
 {
 	struct fuse_conn *fc = get_fuse_conn(dir);
 	struct fuse_inode *fi = get_fuse_inode(dir);
@@ -25,7 +25,7 @@ static bool fuse_use_readdirplus(struct inode *dir, struct file *filp)
 		return true;
 	if (test_and_clear_bit(FUSE_I_ADVISE_RDPLUS, &fi->state))
 		return true;
-	if (filp->f_pos == 0)
+	if (ctx->pos == 0)
 		return true;
 	return false;
 }
@@ -1165,25 +1165,23 @@ static int fuse_permission(struct inode *inode, int mask)
 }
 
 static int parse_dirfile(char *buf, size_t nbytes, struct file *file,
-			 void *dstbuf, filldir_t filldir)
+			 struct dir_context *ctx)
 {
 	while (nbytes >= FUSE_NAME_OFFSET) {
 		struct fuse_dirent *dirent = (struct fuse_dirent *) buf;
 		size_t reclen = FUSE_DIRENT_SIZE(dirent);
-		int over;
 		if (!dirent->namelen || dirent->namelen > FUSE_NAME_MAX)
 			return -EIO;
 		if (reclen > nbytes)
 			break;
 
-		over = filldir(dstbuf, dirent->name, dirent->namelen,
-			       file->f_pos, dirent->ino, dirent->type);
-		if (over)
+		if (!dir_emit(ctx, dirent->name, dirent->namelen,
+			       dirent->ino, dirent->type))
 			break;
 
 		buf += reclen;
 		nbytes -= reclen;
-		file->f_pos = dirent->off;
+		ctx->pos = dirent->off;
 	}
 
 	return 0;
@@ -1284,7 +1282,7 @@ out:
 }
 
 static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
-			     void *dstbuf, filldir_t filldir, u64 attr_version)
+			     struct dir_context *ctx, u64 attr_version)
 {
 	struct fuse_direntplus *direntplus;
 	struct fuse_dirent *dirent;
@@ -1309,10 +1307,9 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
 			   we need to send a FORGET for each of those
 			   which we did not link.
 			*/
-			over = filldir(dstbuf, dirent->name, dirent->namelen,
-				       file->f_pos, dirent->ino,
-				       dirent->type);
-			file->f_pos = dirent->off;
+			over = !dir_emit(ctx, dirent->name, dirent->namelen,
+				       dirent->ino, dirent->type);
+			ctx->pos = dirent->off;
 		}
 
 		buf += reclen;
@@ -1326,7 +1323,7 @@ static int parse_dirplusfile(char *buf, size_t nbytes, struct file *file,
 	return 0;
 }
 
-static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
+static int fuse_readdir(struct file *file, struct dir_context *ctx)
 {
 	int plus, err;
 	size_t nbytes;
@@ -1349,17 +1346,17 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
 		return -ENOMEM;
 	}
 
-	plus = fuse_use_readdirplus(inode, file);
+	plus = fuse_use_readdirplus(inode, ctx);
 	req->out.argpages = 1;
 	req->num_pages = 1;
 	req->pages[0] = page;
 	req->page_descs[0].length = PAGE_SIZE;
 	if (plus) {
 		attr_version = fuse_get_attr_version(fc);
-		fuse_read_fill(req, file, file->f_pos, PAGE_SIZE,
+		fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
 			       FUSE_READDIRPLUS);
 	} else {
-		fuse_read_fill(req, file, file->f_pos, PAGE_SIZE,
+		fuse_read_fill(req, file, ctx->pos, PAGE_SIZE,
 			       FUSE_READDIR);
 	}
 	fuse_request_send(fc, req);
@@ -1369,11 +1366,11 @@ static int fuse_readdir(struct file *file, void *dstbuf, filldir_t filldir)
 	if (!err) {
 		if (plus) {
 			err = parse_dirplusfile(page_address(page), nbytes,
-						file, dstbuf, filldir,
+						file, ctx,
 						attr_version);
 		} else {
 			err = parse_dirfile(page_address(page), nbytes, file,
-					    dstbuf, filldir);
+					    ctx);
 		}
 	}
 
@@ -1886,7 +1883,7 @@ static const struct inode_operations fuse_dir_inode_operations = {
 static const struct file_operations fuse_dir_operations = {
 	.llseek		= generic_file_llseek,
 	.read		= generic_read_dir,
-	.readdir	= fuse_readdir,
+	.iterate	= fuse_readdir,
 	.open		= fuse_dir_open,
 	.release	= fuse_dir_release,
 	.fsync		= fuse_dir_fsync,