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// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2000-2001 Christoph Hellwig.
*/
/*
* Veritas filesystem driver - support for 'immed' inodes.
*/
#include <linux/fs.h>
#include <linux/pagemap.h>
#include "vxfs.h"
#include "vxfs_extern.h"
#include "vxfs_inode.h"
/**
* vxfs_immed_read_folio - read part of an immed inode into pagecache
* @file: file context (unused)
* @folio: folio to fill in.
*
* Description:
* vxfs_immed_read_folio reads a part of the immed area of the
* file that hosts @folio into the pagecache.
*
* Returns:
* Zero on success, else a negative error code.
*
* Locking status:
* @folio is locked and will be unlocked.
*/
static int vxfs_immed_read_folio(struct file *fp, struct folio *folio)
{
struct vxfs_inode_info *vip = VXFS_INO(folio->mapping->host);
void *src = vip->vii_immed.vi_immed + folio_pos(folio);
unsigned long i;
for (i = 0; i < folio_nr_pages(folio); i++) {
memcpy_to_page(folio_page(folio, i), 0, src, PAGE_SIZE);
src += PAGE_SIZE;
}
folio_mark_uptodate(folio);
folio_unlock(folio);
return 0;
}
/*
* Address space operations for immed files and directories.
*/
const struct address_space_operations vxfs_immed_aops = {
.read_folio = vxfs_immed_read_folio,
};
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