#include <linux/errno.h>
#include <linux/fs.h>
-#include <linux/ext2_fs.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/stat.h>
+#include <linux/locks.h>
+
+#include <linux/obd_support.h> /* for ENTRY and EXIT only */
+#include <linux/obdfs.h>
static int obdfs_readlink (struct dentry *, char *, int);
static struct dentry *obdfs_follow_link(struct dentry *, struct dentry *, unsigned int);
-static struct dentry * ext2_follow_link(struct dentry * dentry,
- struct dentry *base,
- unsigned int follow)
+/*
+ * symlinks can't do much...
+ */
+struct inode_operations obdfs_symlink_inode_operations = {
+ NULL, /* no file-operations */
+ NULL, /* create */
+ NULL, /* lookup */
+ NULL, /* link */
+ NULL, /* unlink */
+ NULL, /* symlink */
+ NULL, /* mkdir */
+ NULL, /* rmdir */
+ NULL, /* mknod */
+ NULL, /* rename */
+ obdfs_readlink, /* readlink */
+ obdfs_follow_link, /* follow_link */
+ NULL, /* get_block */
+ NULL, /* readpage */
+ NULL, /* writepage */
+ NULL, /* truncate */
+ NULL, /* permission */
+ NULL /* revalidate */
+};
+
+static struct dentry * obdfs_follow_link(struct dentry * dentry,
+ struct dentry *base,
+ unsigned int follow)
{
struct inode *inode = dentry->d_inode;
struct page *page = NULL;
- int error;
char * link;
+ ENTRY;
link = (char *) inode->u.ext2_i.i_data;
if (inode->i_blocks) {
- if (!(page = obdfs_getpage(inode, 0, 0, &error))) {
+ IDEBUG(inode);
+ page = obdfs_getpage(inode, 0, 0, 0);
+ PDEBUG(page, "follow_link");
+ if (!page) {
dput(base);
+ EXIT;
return ERR_PTR(-EIO);
}
- link = bh->b_data;
+ link = (char *)page_address(page);
}
UPDATE_ATIME(inode);
base = lookup_dentry(link, base, follow);
- if (bh)
- brelse(bh);
+ if (page) {
+ page_cache_release(page);
+ }
+ EXIT;
return base;
}
-static int ext2_readlink (struct dentry * dentry, char * buffer, int buflen)
+static int obdfs_readlink (struct dentry * dentry, char * buffer, int buflen)
{
struct inode *inode = dentry->d_inode;
- struct buffer_head * bh = NULL;
+ struct page *page = NULL;
char * link;
int i;
+ ENTRY;
if (buflen > inode->i_sb->s_blocksize - 1)
buflen = inode->i_sb->s_blocksize - 1;
link = (char *) inode->u.ext2_i.i_data;
if (inode->i_blocks) {
- int err;
- bh = ext2_bread (inode, 0, 0, &err);
- if (!bh) {
- if(err < 0) /* indicate type of error */
- return err;
+ IDEBUG(inode);
+ page = obdfs_getpage(inode, 0, 0, 0);
+ PDEBUG(page, "readlink");
+ if (!page) {
+ EXIT;
return 0;
}
- link = bh->b_data;
+ link = (char *)page_address(page);
}
i = 0;
i++;
if (copy_to_user(buffer, link, i))
i = -EFAULT;
- if (bh)
- brelse (bh);
+ if (page) {
+ page_cache_release(page);
+ }
+ EXIT;
return i;
-}
+} /* obdfs_readlink */