2 * Copyright (c) 2000-2001 Christoph Hellwig.
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31 * Veritas filesystem driver - support for 'immed' inodes.
34 #include <linux/pagemap.h>
37 #include "vxfs_extern.h"
38 #include "vxfs_inode.h"
41 static int vxfs_immed_read_folio(struct file *, struct folio *);
44 * Address space operations for immed files and directories.
46 const struct address_space_operations vxfs_immed_aops = {
47 .read_folio = vxfs_immed_read_folio,
51 * vxfs_immed_read_folio - read part of an immed inode into pagecache
52 * @file: file context (unused)
53 * @folio: folio to fill in.
56 * vxfs_immed_read_folio reads a part of the immed area of the
57 * file that hosts @pp into the pagecache.
60 * Zero on success, else a negative error code.
63 * @folio is locked and will be unlocked.
66 vxfs_immed_read_folio(struct file *fp, struct folio *folio)
68 struct page *pp = &folio->page;
69 struct vxfs_inode_info *vip = VXFS_INO(pp->mapping->host);
70 u_int64_t offset = (u_int64_t)pp->index << PAGE_SHIFT;
74 memcpy(kaddr, vip->vii_immed.vi_immed + offset, PAGE_SIZE);
77 flush_dcache_page(pp);