1 files changed, 0 insertions, 151 deletions
diff --git a/drivers/staging/erofs/dir.c b/drivers/staging/erofs/dir.c
deleted file mode 100644
index dbf6a151886c..000000000000
--- a/drivers/staging/erofs/dir.c
+++ /dev/null
@@ -1,151 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * linux/drivers/staging/erofs/dir.c
- *
- * Copyright (C) 2017-2018 HUAWEI, Inc.
- *             http://www.huawei.com/
- * Created by Gao Xiang <gaoxiang25@huawei.com>
- *
- * This file is subject to the terms and conditions of the GNU General Public
- * License.  See the file COPYING in the main directory of the Linux
- * distribution for more details.
- */
-#include "internal.h"
-
-static const unsigned char erofs_filetype_table[EROFS_FT_MAX] = {
-	[EROFS_FT_UNKNOWN]	= DT_UNKNOWN,
-	[EROFS_FT_REG_FILE]	= DT_REG,
-	[EROFS_FT_DIR]		= DT_DIR,
-	[EROFS_FT_CHRDEV]	= DT_CHR,
-	[EROFS_FT_BLKDEV]	= DT_BLK,
-	[EROFS_FT_FIFO]		= DT_FIFO,
-	[EROFS_FT_SOCK]		= DT_SOCK,
-	[EROFS_FT_SYMLINK]	= DT_LNK,
-};
-
-static void debug_one_dentry(unsigned char d_type, const char *de_name,
-			     unsigned int de_namelen)
-{
-#ifdef CONFIG_EROFS_FS_DEBUG
-	/* since the on-disk name could not have the trailing '\0' */
-	unsigned char dbg_namebuf[EROFS_NAME_LEN + 1];
-
-	memcpy(dbg_namebuf, de_name, de_namelen);
-	dbg_namebuf[de_namelen] = '\0';
-
-	debugln("found dirent %s de_len %u d_type %d", dbg_namebuf,
-		de_namelen, d_type);
-#endif
-}
-
-static int erofs_fill_dentries(struct dir_context *ctx,
-			       void *dentry_blk, unsigned int *ofs,
-			       unsigned int nameoff, unsigned int maxsize)
-{
-	struct erofs_dirent *de = dentry_blk + *ofs;
-	const struct erofs_dirent *end = dentry_blk + nameoff;
-
-	while (de < end) {
-		const char *de_name;
-		unsigned int de_namelen;
-		unsigned char d_type;
-
-		if (de->file_type < EROFS_FT_MAX)
-			d_type = erofs_filetype_table[de->file_type];
-		else
-			d_type = DT_UNKNOWN;
-
-		nameoff = le16_to_cpu(de->nameoff);
-		de_name = (char *)dentry_blk + nameoff;
-
-		/* the last dirent in the block? */
-		if (de + 1 >= end)
-			de_namelen = strnlen(de_name, maxsize - nameoff);
-		else
-			de_namelen = le16_to_cpu(de[1].nameoff) - nameoff;
-
-		/* a corrupted entry is found */
-		if (unlikely(nameoff + de_namelen > maxsize ||
-			     de_namelen > EROFS_NAME_LEN)) {
-			DBG_BUGON(1);
-			return -EIO;
-		}
-
-		debug_one_dentry(d_type, de_name, de_namelen);
-		if (!dir_emit(ctx, de_name, de_namelen,
-			      le64_to_cpu(de->nid), d_type))
-			/* stopped by some reason */
-			return 1;
-		++de;
-		*ofs += sizeof(struct erofs_dirent);
-	}
-	*ofs = maxsize;
-	return 0;
-}
-
-static int erofs_readdir(struct file *f, struct dir_context *ctx)
-{
-	struct inode *dir = file_inode(f);
-	struct address_space *mapping = dir->i_mapping;
-	const size_t dirsize = i_size_read(dir);
-	unsigned int i = ctx->pos / EROFS_BLKSIZ;
-	unsigned int ofs = ctx->pos % EROFS_BLKSIZ;
-	int err = 0;
-	bool initial = true;
-
-	while (ctx->pos < dirsize) {
-		struct page *dentry_page;
-		struct erofs_dirent *de;
-		unsigned int nameoff, maxsize;
-
-		dentry_page = read_mapping_page(mapping, i, NULL);
-		if (IS_ERR(dentry_page))
-			continue;
-
-		de = (struct erofs_dirent *)kmap(dentry_page);
-
-		nameoff = le16_to_cpu(de->nameoff);
-
-		if (unlikely(nameoff < sizeof(struct erofs_dirent) ||
-			     nameoff >= PAGE_SIZE)) {
-			errln("%s, invalid de[0].nameoff %u",
-			      __func__, nameoff);
-
-			err = -EIO;
-			goto skip_this;
-		}
-
-		maxsize = min_t(unsigned int,
-				dirsize - ctx->pos + ofs, PAGE_SIZE);
-
-		/* search dirents at the arbitrary position */
-		if (unlikely(initial)) {
-			initial = false;
-
-			ofs = roundup(ofs, sizeof(struct erofs_dirent));
-			if (unlikely(ofs >= nameoff))
-				goto skip_this;
-		}
-
-		err = erofs_fill_dentries(ctx, de, &ofs, nameoff, maxsize);
-skip_this:
-		kunmap(dentry_page);
-
-		put_page(dentry_page);
-
-		ctx->pos = blknr_to_addr(i) + ofs;
-
-		if (unlikely(err))
-			break;
-		++i;
-		ofs = 0;
-	}
-	return err < 0 ? err : 0;
-}
-
-const struct file_operations erofs_dir_fops = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.iterate_shared	= erofs_readdir,
-};
-