mirror of
https://github.com/torvalds/linux.git
synced 2024-11-25 13:41:51 +00:00
1b6f3c8731
This is a "weak" conversion which converts straight back to using pages. A full conversion should be performed at some point, hopefully by someone familiar with the filesystem. Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
78 lines
1.7 KiB
C
78 lines
1.7 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
/*
|
|
* 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_read_folio(struct file *file, struct folio *folio)
|
|
{
|
|
struct page *page = &folio->page;
|
|
struct buffer_head *bh;
|
|
struct inode *inode = page->mapping->host;
|
|
char *link = page_address(page);
|
|
struct slink_front *lf;
|
|
int i, j;
|
|
char c;
|
|
char lc;
|
|
|
|
pr_debug("get_link(ino=%lu)\n", inode->i_ino);
|
|
|
|
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;
|
|
|
|
if (strchr(lf->symname,':')) { /* Handle assign or volume name */
|
|
struct affs_sb_info *sbi = AFFS_SB(inode->i_sb);
|
|
char *pf;
|
|
spin_lock(&sbi->symlink_lock);
|
|
pf = sbi->s_prefix ? sbi->s_prefix : "/";
|
|
while (i < 1023 && (c = pf[i]))
|
|
link[i++] = c;
|
|
spin_unlock(&sbi->symlink_lock);
|
|
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);
|
|
unlock_page(page);
|
|
return 0;
|
|
fail:
|
|
SetPageError(page);
|
|
unlock_page(page);
|
|
return -EIO;
|
|
}
|
|
|
|
const struct address_space_operations affs_symlink_aops = {
|
|
.read_folio = affs_symlink_read_folio,
|
|
};
|
|
|
|
const struct inode_operations affs_symlink_inode_operations = {
|
|
.get_link = page_get_link,
|
|
.setattr = affs_notify_change,
|
|
};
|