5 * Symlink handling routines for the OSTA-UDF(tm) filesystem.
8 * This file is distributed under the terms of the GNU General Public
9 * License (GPL). Copies of the GPL can be obtained from:
10 * ftp://prep.ai.mit.edu/pub/gnu/GPL
11 * Each contributing author retains all rights to their own work.
13 * (C) 1998-2001 Ben Fennema
14 * (C) 1999 Stelias Computing Inc
18 * 04/16/99 blf Created.
23 #include <asm/uaccess.h>
24 #include <linux/errno.h>
26 #include <linux/time.h>
28 #include <linux/stat.h>
29 #include <linux/slab.h>
30 #include <linux/pagemap.h>
31 #include <linux/smp_lock.h>
32 #include <linux/buffer_head.h>
35 static void udf_pc_to_char(struct super_block *sb, char *from, int fromlen,
38 struct pathComponent *pc;
42 while (elen < fromlen) {
43 pc = (struct pathComponent *)(from + elen);
44 switch (pc->componentType) {
46 if (pc->lengthComponentIdent == 0) {
58 /* that would be . - just ignore */
61 p += udf_get_filename(sb, pc->componentIdent, p,
62 pc->lengthComponentIdent);
66 elen += sizeof(struct pathComponent) + pc->lengthComponentIdent;
74 static int udf_symlink_filler(struct file *file, struct page *page)
76 struct inode *inode = page->mapping->host;
77 struct buffer_head *bh = NULL;
81 struct udf_inode_info *iinfo;
85 if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_IN_ICB) {
86 symlink = iinfo->i_ext.i_data + iinfo->i_lenEAttr;
88 bh = sb_bread(inode->i_sb, udf_block_map(inode, 0));
96 udf_pc_to_char(inode->i_sb, symlink, inode->i_size, p);
100 SetPageUptodate(page);
114 * symlinks can't do much...
116 const struct address_space_operations udf_symlink_aops = {
117 .readpage = udf_symlink_filler,