// 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, };