static int ocfs2_fast_symlink_readpage(struct file *unused, struct page *page)
{
struct inode *inode = page->mapping->host;
struct buffer_head *bh = NULL;
int status = ocfs2_read_inode_block(inode, &bh);
struct ocfs2_dinode *fe;
const char *link;
void *kaddr;
size_t len;
if (status < 0) {
mlog_errno(status);
return status;
}
fe = (struct ocfs2_dinode *) bh->b_data;
link = (char *) fe->id2.i_symlink;
/* will be less than a page size */
len = strnlen(link, ocfs2_fast_symlink_chars(inode->i_sb));
kaddr = kmap_atomic(page);
memcpy(kaddr, link, len + 1);
kunmap_atomic(kaddr);
SetPageUptodate(page);
unlock_page(page);
brelse(bh);
return 0;
}
static void *ocfs2_fast_follow_link(struct dentry *dentry,
struct nameidata *nd)
{
int status = 0;
int len;
char *target, *link = ERR_PTR(-ENOMEM);
struct inode *inode = dentry->d_inode;
struct buffer_head *bh = NULL;
mlog_entry_void();
BUG_ON(!ocfs2_inode_is_fast_symlink(inode));
target = ocfs2_fast_symlink_getlink(inode, &bh);
if (IS_ERR(target)) {
status = PTR_ERR(target);
mlog_errno(status);
goto bail;
}
/* Fast symlinks can't be large */
len = strnlen(target, ocfs2_fast_symlink_chars(inode->i_sb));
link = kzalloc(len + 1, GFP_NOFS);
if (!link) {
status = -ENOMEM;
mlog_errno(status);
goto bail;
}
memcpy(link, target, len);
nd_set_link(nd, link);
bail:
brelse(bh);
mlog_exit(status);
return status ? ERR_PTR(status) : link;
}
