1 /*
2 * linux/fs/affs/symlink.c
3 *
4 * 1995 Hans-Joachim Widmaier - Modified for affs.
5 *
6 * Copyright (C) 1991, 1992 Linus Torvalds
7 *
8 * affs symlink handling code
9 */
10
11 #include "affs.h"
12
13 static int affs_symlink_readpage(struct file *file, struct page *page)
14 {
15 struct buffer_head *bh;
16 struct inode *inode = page->mapping->host;
17 char *link = kmap(page);
18 struct slink_front *lf;
19 int err;
20 int i, j;
21 char c;
22 char lc;
23 char *pf;
24
25 pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino);
26
27 err = -EIO;
28 bh = affs_bread(inode->i_sb, inode->i_ino);
29 if (!bh)
30 goto fail;
31 i = 0;
32 j = 0;
33 lf = (struct slink_front *)bh->b_data;
34 lc = 0;
35 pf = AFFS_SB(inode->i_sb)->s_prefix ? AFFS_SB(inode->i_sb)->s_prefix : "/";
36
37 if (strchr(lf->symname,':')) { /* Handle assign or volume name */
38 while (i < 1023 && (c = pf[i]))
39 link[i++] = c;
40 while (i < 1023 && lf->symname[j] != ':')
41 link[i++] = lf->symname[j++];
42 if (i < 1023)
43 link[i++] = '/';
44 j++;
45 lc = '/';
46 }
47 while (i < 1023 && (c = lf->symname[j])) {
48 if (c == '/' && lc == '/' && i < 1020) { /* parent dir */
49 link[i++] = '.';
50 link[i++] = '.';
51 }
52 link[i++] = c;
53 lc = c;
54 j++;
55 }
56 link[i] = '\0';
57 affs_brelse(bh);
58 SetPageUptodate(page);
59 kunmap(page);
60 unlock_page(page);
61 return 0;
62 fail:
63 SetPageError(page);
64 kunmap(page);
65 unlock_page(page);
66 return err;
67 }
68
69 struct address_space_operations affs_symlink_aops = {
70 .readpage = affs_symlink_readpage,
71 };
72
73 struct inode_operations affs_symlink_inode_operations = {
74 .readlink = generic_readlink,
75 .follow_link = page_follow_link_light,
76 .put_link = page_put_link,
77 .setattr = affs_notify_change,
78 };
79
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