From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sun, 7 Apr 2024 20:49:45 +0200 Subject: Adding upstream version 6.1.76. Signed-off-by: Daniel Baumann --- fs/freevxfs/vxfs_immed.c | 53 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 fs/freevxfs/vxfs_immed.c (limited to 'fs/freevxfs/vxfs_immed.c') diff --git a/fs/freevxfs/vxfs_immed.c b/fs/freevxfs/vxfs_immed.c new file mode 100644 index 000000000..9b49ec36e --- /dev/null +++ b/fs/freevxfs/vxfs_immed.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2000-2001 Christoph Hellwig. + */ + +/* + * Veritas filesystem driver - support for 'immed' inodes. + */ +#include +#include + +#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, +}; -- cgit v1.2.3