5 * Symlink handling routines for the OSTA-UDF(tm) filesystem.
8 * E-mail regarding any portion of the Linux UDF file system should be
9 * directed to the development team mailing list (run by majordomo):
10 * linux_udf@hpesjro.fc.hp.com
13 * This file is distributed under the terms of the GNU General Public
14 * License (GPL). Copies of the GPL can be obtained from:
15 * ftp://prep.ai.mit.edu/pub/gnu/GPL
16 * Each contributing author retains all rights to their own work.
18 * (C) 1998-2001 Ben Fennema
19 * (C) 1999 Stelias Computing Inc
23 * 04/16/99 blf Created.
28 #include <asm/uaccess.h>
29 #include <linux/errno.h>
31 #include <linux/udf_fs.h>
32 #include <linux/sched.h>
34 #include <linux/stat.h>
35 #include <linux/slab.h>
36 #include <linux/pagemap.h>
37 #include <linux/smp_lock.h>
40 static void udf_pc_to_char(char *from, int fromlen, char *to)
42 struct pathComponent *pc;
46 while (elen < fromlen)
48 pc = (struct pathComponent *)(from + elen);
49 switch (pc->componentType)
52 if (pc->lengthComponentIdent == 0)
65 /* that would be . - just ignore */
68 memcpy(p, pc->componentIdent, pc->lengthComponentIdent);
69 p += pc->lengthComponentIdent;
72 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
80 static int udf_symlink_filler(struct file *file, struct page *page)
82 struct inode *inode = page->mapping->host;
83 struct buffer_head *bh = NULL;
89 if (UDF_I_ALLOCTYPE(inode) == ICBTAG_FLAG_AD_IN_ICB)
91 bh = udf_tread(inode->i_sb, inode->i_ino);
96 symlink = bh->b_data + udf_file_entry_alloc_offset(inode);
100 bh = sb_bread(inode->i_sb, udf_block_map(inode, 0));
105 symlink = bh->b_data;
108 udf_pc_to_char(symlink, inode->i_size, p);
109 udf_release_data(bh);
112 SetPageUptodate(page);
125 * symlinks can't do much...
127 struct address_space_operations udf_symlink_aops = {
128 readpage: udf_symlink_filler,