Commit | Line | Data |
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1da177e4 LT |
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 | ||
f5e54d6e | 69 | const struct address_space_operations affs_symlink_aops = { |
1da177e4 LT |
70 | .readpage = affs_symlink_readpage, |
71 | }; | |
72 | ||
754661f1 | 73 | const struct inode_operations affs_symlink_inode_operations = { |
1da177e4 LT |
74 | .readlink = generic_readlink, |
75 | .follow_link = page_follow_link_light, | |
76 | .put_link = page_put_link, | |
77 | .setattr = affs_notify_change, | |
78 | }; |