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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (c) 2000-2001 Christoph Hellwig.4 */5 6/*7 * Veritas filesystem driver - support for 'immed' inodes.8 */9#include <linux/fs.h>10#include <linux/pagemap.h>11 12#include "vxfs.h"13#include "vxfs_extern.h"14#include "vxfs_inode.h"15 16/**17 * vxfs_immed_read_folio - read part of an immed inode into pagecache18 * @fp: file context (unused)19 * @folio: folio to fill in.20 *21 * Description:22 * vxfs_immed_read_folio reads a part of the immed area of the23 * file that hosts @folio into the pagecache.24 *25 * Returns:26 * Zero on success, else a negative error code.27 *28 * Locking status:29 * @folio is locked and will be unlocked.30 */31static int vxfs_immed_read_folio(struct file *fp, struct folio *folio)32{33 struct vxfs_inode_info *vip = VXFS_INO(folio->mapping->host);34 void *src = vip->vii_immed.vi_immed + folio_pos(folio);35 unsigned long i;36 37 for (i = 0; i < folio_nr_pages(folio); i++) {38 memcpy_to_page(folio_page(folio, i), 0, src, PAGE_SIZE);39 src += PAGE_SIZE;40 }41 42 folio_mark_uptodate(folio);43 folio_unlock(folio);44 45 return 0;46}47 48/*49 * Address space operations for immed files and directories.50 */51const struct address_space_operations vxfs_immed_aops = {52 .read_folio = vxfs_immed_read_folio,53};54