1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253 |
- // 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,
- };
|