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/* * linux/fs/affs/symlink.c * * 1995 Hans-Joachim Widmaier - Modified for affs. * * Copyright (C) 1991, 1992 Linus Torvalds * * affs symlink handling code */ #include "affs.h" static int affs_symlink_readpage(struct file *file, struct page *page) { struct buffer_head *bh; struct inode *inode = page->mapping->host; char *link = kmap(page); struct slink_front *lf; int err; int i, j; char c; char lc; char *pf; pr_debug("AFFS: follow_link(ino=%lu)\n",inode->i_ino); err = -EIO; bh = affs_bread(inode->i_sb, inode->i_ino); if (!bh) goto fail; i = 0; j = 0; lf = (struct slink_front *)bh->b_data; lc = 0; pf = AFFS_SB(inode->i_sb)->s_prefix ? AFFS_SB(inode->i_sb)->s_prefix : "/"; if (strchr(lf->symname,':')) { /* Handle assign or volume name */ while (i < 1023 && (c = pf[i])) link[i++] = c; while (i < 1023 && lf->symname[j] != ':') link[i++] = lf->symname[j++]; if (i < 1023) link[i++] = '/'; j++; lc = '/'; } while (i < 1023 && (c = lf->symname[j])) { if (c == '/' && lc == '/' && i < 1020) { /* parent dir */ link[i++] = '.'; link[i++] = '.'; } link[i++] = c; lc = c; j++; } link[i] = '\0'; affs_brelse(bh); SetPageUptodate(page); kunmap(page); unlock_page(page); return 0; fail: SetPageError(page); kunmap(page); unlock_page(page); return err; } const struct address_space_operations affs_symlink_aops = { .readpage = affs_symlink_readpage, }; const struct inode_operations affs_symlink_inode_operations = { .readlink = generic_readlink, .follow_link = page_follow_link_light, .put_link = page_put_link, .setattr = affs_notify_change, }; |