xref: /openbmc/linux/fs/coda/symlink.c (revision 22246614)
1 /*
2  * Symlink inode operations for Coda filesystem
3  * Original version: (C) 1996 P. Braam and M. Callahan
4  * Rewritten for Linux 2.1. (C) 1997 Carnegie Mellon University
5  *
6  * Carnegie Mellon encourages users to contribute improvements to
7  * the Coda project. Contact Peter Braam (coda@cs.cmu.edu).
8  */
9 
10 #include <linux/types.h>
11 #include <linux/kernel.h>
12 #include <linux/time.h>
13 #include <linux/fs.h>
14 #include <linux/stat.h>
15 #include <linux/errno.h>
16 #include <linux/pagemap.h>
17 #include <linux/smp_lock.h>
18 
19 #include <linux/coda.h>
20 #include <linux/coda_linux.h>
21 #include <linux/coda_psdev.h>
22 #include <linux/coda_fs_i.h>
23 
24 static int coda_symlink_filler(struct file *file, struct page *page)
25 {
26 	struct inode *inode = page->mapping->host;
27 	int error;
28 	struct coda_inode_info *cii;
29 	unsigned int len = PAGE_SIZE;
30 	char *p = kmap(page);
31 
32 	lock_kernel();
33 	cii = ITOC(inode);
34 
35 	error = venus_readlink(inode->i_sb, &cii->c_fid, p, &len);
36 	unlock_kernel();
37 	if (error)
38 		goto fail;
39 	SetPageUptodate(page);
40 	kunmap(page);
41 	unlock_page(page);
42 	return 0;
43 
44 fail:
45 	SetPageError(page);
46 	kunmap(page);
47 	unlock_page(page);
48 	return error;
49 }
50 
51 const struct address_space_operations coda_symlink_aops = {
52 	.readpage	= coda_symlink_filler,
53 };
54