1 // SPDX-License-Identifier: GPL-2.0
5 * Copyright (c) 1999 Al Smith
7 * Portions derived from work (c) 1995,1996 Christian Vogelgsang.
10 #include <linux/string.h>
11 #include <linux/pagemap.h>
12 #include <linux/buffer_head.h>
15 static int efs_symlink_read_folio(struct file *file, struct folio *folio)
17 char *link = folio_address(folio);
18 struct buffer_head *bh;
19 struct inode *inode = folio->mapping->host;
20 efs_block_t size = inode->i_size;
24 if (size > 2 * EFS_BLOCKSIZE)
27 /* read first 512 bytes of link target */
29 bh = sb_bread(inode->i_sb, efs_bmap(inode, 0));
32 memcpy(link, bh->b_data, (size > EFS_BLOCKSIZE) ? EFS_BLOCKSIZE : size);
34 if (size > EFS_BLOCKSIZE) {
35 bh = sb_bread(inode->i_sb, efs_bmap(inode, 1));
38 memcpy(link + EFS_BLOCKSIZE, bh->b_data, size - EFS_BLOCKSIZE);
44 folio_end_read(folio, err == 0);
48 const struct address_space_operations efs_symlink_aops = {
49 .read_folio = efs_symlink_read_folio