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![David Howells](/assets/img/avatar_default.png)
that's the bulk of filesystem drivers dealing with inodes of their own Signed-off-by: David Howells <dhowells@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
692 lines
18 KiB
C
692 lines
18 KiB
C
/*
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* linux/fs/hfs/inode.c
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*
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* Copyright (C) 1995-1997 Paul H. Hargrove
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* (C) 2003 Ardis Technologies <roman@ardistech.com>
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* This file may be distributed under the terms of the GNU General Public License.
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*
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* This file contains inode-related functions which do not depend on
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* which scheme is being used to represent forks.
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*
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* Based on the minix file system code, (C) 1991, 1992 by Linus Torvalds
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*/
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#include <linux/pagemap.h>
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#include <linux/mpage.h>
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#include <linux/sched.h>
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#include <linux/uio.h>
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#include "hfs_fs.h"
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#include "btree.h"
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static const struct file_operations hfs_file_operations;
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static const struct inode_operations hfs_file_inode_operations;
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/*================ Variable-like macros ================*/
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#define HFS_VALID_MODE_BITS (S_IFREG | S_IFDIR | S_IRWXUGO)
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static int hfs_writepage(struct page *page, struct writeback_control *wbc)
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{
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return block_write_full_page(page, hfs_get_block, wbc);
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}
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static int hfs_readpage(struct file *file, struct page *page)
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{
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return block_read_full_page(page, hfs_get_block);
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}
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static void hfs_write_failed(struct address_space *mapping, loff_t to)
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{
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struct inode *inode = mapping->host;
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if (to > inode->i_size) {
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truncate_pagecache(inode, inode->i_size);
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hfs_file_truncate(inode);
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}
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}
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static int hfs_write_begin(struct file *file, struct address_space *mapping,
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loff_t pos, unsigned len, unsigned flags,
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struct page **pagep, void **fsdata)
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{
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int ret;
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*pagep = NULL;
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ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
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hfs_get_block,
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&HFS_I(mapping->host)->phys_size);
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if (unlikely(ret))
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hfs_write_failed(mapping, pos + len);
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return ret;
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}
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static sector_t hfs_bmap(struct address_space *mapping, sector_t block)
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{
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return generic_block_bmap(mapping, block, hfs_get_block);
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}
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static int hfs_releasepage(struct page *page, gfp_t mask)
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{
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struct inode *inode = page->mapping->host;
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struct super_block *sb = inode->i_sb;
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struct hfs_btree *tree;
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struct hfs_bnode *node;
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u32 nidx;
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int i, res = 1;
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switch (inode->i_ino) {
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case HFS_EXT_CNID:
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tree = HFS_SB(sb)->ext_tree;
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break;
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case HFS_CAT_CNID:
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tree = HFS_SB(sb)->cat_tree;
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break;
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default:
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BUG();
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return 0;
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}
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if (!tree)
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return 0;
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if (tree->node_size >= PAGE_CACHE_SIZE) {
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nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
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spin_lock(&tree->hash_lock);
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node = hfs_bnode_findhash(tree, nidx);
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if (!node)
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;
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else if (atomic_read(&node->refcnt))
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res = 0;
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if (res && node) {
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hfs_bnode_unhash(node);
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hfs_bnode_free(node);
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}
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spin_unlock(&tree->hash_lock);
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} else {
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nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
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i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
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spin_lock(&tree->hash_lock);
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do {
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node = hfs_bnode_findhash(tree, nidx++);
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if (!node)
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continue;
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if (atomic_read(&node->refcnt)) {
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res = 0;
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break;
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}
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hfs_bnode_unhash(node);
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hfs_bnode_free(node);
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} while (--i && nidx < tree->node_count);
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spin_unlock(&tree->hash_lock);
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}
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return res ? try_to_free_buffers(page) : 0;
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}
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static ssize_t hfs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
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loff_t offset)
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{
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struct file *file = iocb->ki_filp;
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struct address_space *mapping = file->f_mapping;
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struct inode *inode = file_inode(file)->i_mapping->host;
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size_t count = iov_iter_count(iter);
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ssize_t ret;
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ret = blockdev_direct_IO(iocb, inode, iter, offset, hfs_get_block);
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/*
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* In case of error extending write may have instantiated a few
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* blocks outside i_size. Trim these off again.
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*/
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if (unlikely(iov_iter_rw(iter) == WRITE && ret < 0)) {
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loff_t isize = i_size_read(inode);
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loff_t end = offset + count;
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if (end > isize)
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hfs_write_failed(mapping, end);
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}
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return ret;
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}
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static int hfs_writepages(struct address_space *mapping,
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struct writeback_control *wbc)
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{
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return mpage_writepages(mapping, wbc, hfs_get_block);
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}
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const struct address_space_operations hfs_btree_aops = {
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.readpage = hfs_readpage,
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.writepage = hfs_writepage,
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.write_begin = hfs_write_begin,
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.write_end = generic_write_end,
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.bmap = hfs_bmap,
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.releasepage = hfs_releasepage,
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};
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const struct address_space_operations hfs_aops = {
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.readpage = hfs_readpage,
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.writepage = hfs_writepage,
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.write_begin = hfs_write_begin,
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.write_end = generic_write_end,
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.bmap = hfs_bmap,
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.direct_IO = hfs_direct_IO,
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.writepages = hfs_writepages,
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};
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/*
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* hfs_new_inode
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*/
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struct inode *hfs_new_inode(struct inode *dir, struct qstr *name, umode_t mode)
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{
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struct super_block *sb = dir->i_sb;
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struct inode *inode = new_inode(sb);
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if (!inode)
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return NULL;
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mutex_init(&HFS_I(inode)->extents_lock);
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INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
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hfs_cat_build_key(sb, (btree_key *)&HFS_I(inode)->cat_key, dir->i_ino, name);
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inode->i_ino = HFS_SB(sb)->next_id++;
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inode->i_mode = mode;
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inode->i_uid = current_fsuid();
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inode->i_gid = current_fsgid();
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set_nlink(inode, 1);
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inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
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HFS_I(inode)->flags = 0;
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HFS_I(inode)->rsrc_inode = NULL;
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HFS_I(inode)->fs_blocks = 0;
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if (S_ISDIR(mode)) {
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inode->i_size = 2;
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HFS_SB(sb)->folder_count++;
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if (dir->i_ino == HFS_ROOT_CNID)
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HFS_SB(sb)->root_dirs++;
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inode->i_op = &hfs_dir_inode_operations;
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inode->i_fop = &hfs_dir_operations;
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inode->i_mode |= S_IRWXUGO;
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inode->i_mode &= ~HFS_SB(inode->i_sb)->s_dir_umask;
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} else if (S_ISREG(mode)) {
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HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
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HFS_SB(sb)->file_count++;
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if (dir->i_ino == HFS_ROOT_CNID)
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HFS_SB(sb)->root_files++;
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inode->i_op = &hfs_file_inode_operations;
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inode->i_fop = &hfs_file_operations;
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inode->i_mapping->a_ops = &hfs_aops;
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inode->i_mode |= S_IRUGO|S_IXUGO;
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if (mode & S_IWUSR)
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inode->i_mode |= S_IWUGO;
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inode->i_mode &= ~HFS_SB(inode->i_sb)->s_file_umask;
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HFS_I(inode)->phys_size = 0;
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HFS_I(inode)->alloc_blocks = 0;
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HFS_I(inode)->first_blocks = 0;
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HFS_I(inode)->cached_start = 0;
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HFS_I(inode)->cached_blocks = 0;
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memset(HFS_I(inode)->first_extents, 0, sizeof(hfs_extent_rec));
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memset(HFS_I(inode)->cached_extents, 0, sizeof(hfs_extent_rec));
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}
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insert_inode_hash(inode);
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mark_inode_dirty(inode);
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set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
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hfs_mark_mdb_dirty(sb);
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return inode;
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}
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void hfs_delete_inode(struct inode *inode)
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{
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struct super_block *sb = inode->i_sb;
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hfs_dbg(INODE, "delete_inode: %lu\n", inode->i_ino);
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if (S_ISDIR(inode->i_mode)) {
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HFS_SB(sb)->folder_count--;
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if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
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HFS_SB(sb)->root_dirs--;
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set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
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hfs_mark_mdb_dirty(sb);
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return;
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}
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HFS_SB(sb)->file_count--;
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if (HFS_I(inode)->cat_key.ParID == cpu_to_be32(HFS_ROOT_CNID))
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HFS_SB(sb)->root_files--;
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if (S_ISREG(inode->i_mode)) {
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if (!inode->i_nlink) {
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inode->i_size = 0;
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hfs_file_truncate(inode);
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}
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}
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set_bit(HFS_FLG_MDB_DIRTY, &HFS_SB(sb)->flags);
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hfs_mark_mdb_dirty(sb);
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}
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void hfs_inode_read_fork(struct inode *inode, struct hfs_extent *ext,
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__be32 __log_size, __be32 phys_size, u32 clump_size)
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{
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struct super_block *sb = inode->i_sb;
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u32 log_size = be32_to_cpu(__log_size);
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u16 count;
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int i;
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memcpy(HFS_I(inode)->first_extents, ext, sizeof(hfs_extent_rec));
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for (count = 0, i = 0; i < 3; i++)
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count += be16_to_cpu(ext[i].count);
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HFS_I(inode)->first_blocks = count;
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inode->i_size = HFS_I(inode)->phys_size = log_size;
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HFS_I(inode)->fs_blocks = (log_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
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inode_set_bytes(inode, HFS_I(inode)->fs_blocks << sb->s_blocksize_bits);
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HFS_I(inode)->alloc_blocks = be32_to_cpu(phys_size) /
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HFS_SB(sb)->alloc_blksz;
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HFS_I(inode)->clump_blocks = clump_size / HFS_SB(sb)->alloc_blksz;
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if (!HFS_I(inode)->clump_blocks)
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HFS_I(inode)->clump_blocks = HFS_SB(sb)->clumpablks;
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}
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struct hfs_iget_data {
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struct hfs_cat_key *key;
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hfs_cat_rec *rec;
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};
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static int hfs_test_inode(struct inode *inode, void *data)
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{
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struct hfs_iget_data *idata = data;
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hfs_cat_rec *rec;
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rec = idata->rec;
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switch (rec->type) {
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case HFS_CDR_DIR:
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return inode->i_ino == be32_to_cpu(rec->dir.DirID);
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case HFS_CDR_FIL:
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return inode->i_ino == be32_to_cpu(rec->file.FlNum);
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default:
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BUG();
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return 1;
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}
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}
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/*
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* hfs_read_inode
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*/
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static int hfs_read_inode(struct inode *inode, void *data)
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{
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struct hfs_iget_data *idata = data;
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struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
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hfs_cat_rec *rec;
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HFS_I(inode)->flags = 0;
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HFS_I(inode)->rsrc_inode = NULL;
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mutex_init(&HFS_I(inode)->extents_lock);
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INIT_LIST_HEAD(&HFS_I(inode)->open_dir_list);
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/* Initialize the inode */
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inode->i_uid = hsb->s_uid;
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inode->i_gid = hsb->s_gid;
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set_nlink(inode, 1);
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if (idata->key)
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HFS_I(inode)->cat_key = *idata->key;
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else
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HFS_I(inode)->flags |= HFS_FLG_RSRC;
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HFS_I(inode)->tz_secondswest = sys_tz.tz_minuteswest * 60;
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rec = idata->rec;
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switch (rec->type) {
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case HFS_CDR_FIL:
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if (!HFS_IS_RSRC(inode)) {
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hfs_inode_read_fork(inode, rec->file.ExtRec, rec->file.LgLen,
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rec->file.PyLen, be16_to_cpu(rec->file.ClpSize));
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} else {
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hfs_inode_read_fork(inode, rec->file.RExtRec, rec->file.RLgLen,
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rec->file.RPyLen, be16_to_cpu(rec->file.ClpSize));
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}
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inode->i_ino = be32_to_cpu(rec->file.FlNum);
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inode->i_mode = S_IRUGO | S_IXUGO;
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if (!(rec->file.Flags & HFS_FIL_LOCK))
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inode->i_mode |= S_IWUGO;
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inode->i_mode &= ~hsb->s_file_umask;
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inode->i_mode |= S_IFREG;
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inode->i_ctime = inode->i_atime = inode->i_mtime =
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hfs_m_to_utime(rec->file.MdDat);
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inode->i_op = &hfs_file_inode_operations;
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inode->i_fop = &hfs_file_operations;
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inode->i_mapping->a_ops = &hfs_aops;
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break;
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case HFS_CDR_DIR:
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inode->i_ino = be32_to_cpu(rec->dir.DirID);
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inode->i_size = be16_to_cpu(rec->dir.Val) + 2;
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HFS_I(inode)->fs_blocks = 0;
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inode->i_mode = S_IFDIR | (S_IRWXUGO & ~hsb->s_dir_umask);
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inode->i_ctime = inode->i_atime = inode->i_mtime =
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hfs_m_to_utime(rec->dir.MdDat);
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inode->i_op = &hfs_dir_inode_operations;
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inode->i_fop = &hfs_dir_operations;
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break;
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default:
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make_bad_inode(inode);
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}
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return 0;
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}
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/*
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* __hfs_iget()
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*
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* Given the MDB for a HFS filesystem, a 'key' and an 'entry' in
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* the catalog B-tree and the 'type' of the desired file return the
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* inode for that file/directory or NULL. Note that 'type' indicates
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* whether we want the actual file or directory, or the corresponding
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* metadata (AppleDouble header file or CAP metadata file).
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*/
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struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec)
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{
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struct hfs_iget_data data = { key, rec };
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struct inode *inode;
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u32 cnid;
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switch (rec->type) {
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case HFS_CDR_DIR:
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cnid = be32_to_cpu(rec->dir.DirID);
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break;
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case HFS_CDR_FIL:
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cnid = be32_to_cpu(rec->file.FlNum);
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break;
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default:
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return NULL;
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}
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inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data);
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if (inode && (inode->i_state & I_NEW))
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unlock_new_inode(inode);
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return inode;
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}
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void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext,
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__be32 *log_size, __be32 *phys_size)
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{
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memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec));
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if (log_size)
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*log_size = cpu_to_be32(inode->i_size);
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if (phys_size)
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*phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks *
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HFS_SB(inode->i_sb)->alloc_blksz);
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}
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int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
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{
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struct inode *main_inode = inode;
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struct hfs_find_data fd;
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hfs_cat_rec rec;
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int res;
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hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino);
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res = hfs_ext_write_extent(inode);
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if (res)
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return res;
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if (inode->i_ino < HFS_FIRSTUSER_CNID) {
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switch (inode->i_ino) {
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case HFS_ROOT_CNID:
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break;
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case HFS_EXT_CNID:
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hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree);
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return 0;
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case HFS_CAT_CNID:
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hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree);
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return 0;
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default:
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BUG();
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return -EIO;
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}
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}
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if (HFS_IS_RSRC(inode))
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main_inode = HFS_I(inode)->rsrc_inode;
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if (!main_inode->i_nlink)
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return 0;
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if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd))
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/* panic? */
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return -EIO;
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fd.search_key->cat = HFS_I(main_inode)->cat_key;
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if (hfs_brec_find(&fd))
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/* panic? */
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goto out;
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|
|
if (S_ISDIR(main_inode->i_mode)) {
|
|
if (fd.entrylength < sizeof(struct hfs_cat_dir))
|
|
/* panic? */;
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_dir));
|
|
if (rec.type != HFS_CDR_DIR ||
|
|
be32_to_cpu(rec.dir.DirID) != inode->i_ino) {
|
|
}
|
|
|
|
rec.dir.MdDat = hfs_u_to_mtime(inode->i_mtime);
|
|
rec.dir.Val = cpu_to_be16(inode->i_size - 2);
|
|
|
|
hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_dir));
|
|
} else if (HFS_IS_RSRC(inode)) {
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
hfs_inode_write_fork(inode, rec.file.RExtRec,
|
|
&rec.file.RLgLen, &rec.file.RPyLen);
|
|
hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
} else {
|
|
if (fd.entrylength < sizeof(struct hfs_cat_file))
|
|
/* panic? */;
|
|
hfs_bnode_read(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
if (rec.type != HFS_CDR_FIL ||
|
|
be32_to_cpu(rec.file.FlNum) != inode->i_ino) {
|
|
}
|
|
|
|
if (inode->i_mode & S_IWUSR)
|
|
rec.file.Flags &= ~HFS_FIL_LOCK;
|
|
else
|
|
rec.file.Flags |= HFS_FIL_LOCK;
|
|
hfs_inode_write_fork(inode, rec.file.ExtRec, &rec.file.LgLen, &rec.file.PyLen);
|
|
rec.file.MdDat = hfs_u_to_mtime(inode->i_mtime);
|
|
|
|
hfs_bnode_write(fd.bnode, &rec, fd.entryoffset,
|
|
sizeof(struct hfs_cat_file));
|
|
}
|
|
out:
|
|
hfs_find_exit(&fd);
|
|
return 0;
|
|
}
|
|
|
|
static struct dentry *hfs_file_lookup(struct inode *dir, struct dentry *dentry,
|
|
unsigned int flags)
|
|
{
|
|
struct inode *inode = NULL;
|
|
hfs_cat_rec rec;
|
|
struct hfs_find_data fd;
|
|
int res;
|
|
|
|
if (HFS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
|
|
goto out;
|
|
|
|
inode = HFS_I(dir)->rsrc_inode;
|
|
if (inode)
|
|
goto out;
|
|
|
|
inode = new_inode(dir->i_sb);
|
|
if (!inode)
|
|
return ERR_PTR(-ENOMEM);
|
|
|
|
res = hfs_find_init(HFS_SB(dir->i_sb)->cat_tree, &fd);
|
|
if (res) {
|
|
iput(inode);
|
|
return ERR_PTR(res);
|
|
}
|
|
fd.search_key->cat = HFS_I(dir)->cat_key;
|
|
res = hfs_brec_read(&fd, &rec, sizeof(rec));
|
|
if (!res) {
|
|
struct hfs_iget_data idata = { NULL, &rec };
|
|
hfs_read_inode(inode, &idata);
|
|
}
|
|
hfs_find_exit(&fd);
|
|
if (res) {
|
|
iput(inode);
|
|
return ERR_PTR(res);
|
|
}
|
|
HFS_I(inode)->rsrc_inode = dir;
|
|
HFS_I(dir)->rsrc_inode = inode;
|
|
igrab(dir);
|
|
hlist_add_fake(&inode->i_hash);
|
|
mark_inode_dirty(inode);
|
|
out:
|
|
d_add(dentry, inode);
|
|
return NULL;
|
|
}
|
|
|
|
void hfs_evict_inode(struct inode *inode)
|
|
{
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
clear_inode(inode);
|
|
if (HFS_IS_RSRC(inode) && HFS_I(inode)->rsrc_inode) {
|
|
HFS_I(HFS_I(inode)->rsrc_inode)->rsrc_inode = NULL;
|
|
iput(HFS_I(inode)->rsrc_inode);
|
|
}
|
|
}
|
|
|
|
static int hfs_file_open(struct inode *inode, struct file *file)
|
|
{
|
|
if (HFS_IS_RSRC(inode))
|
|
inode = HFS_I(inode)->rsrc_inode;
|
|
atomic_inc(&HFS_I(inode)->opencnt);
|
|
return 0;
|
|
}
|
|
|
|
static int hfs_file_release(struct inode *inode, struct file *file)
|
|
{
|
|
//struct super_block *sb = inode->i_sb;
|
|
|
|
if (HFS_IS_RSRC(inode))
|
|
inode = HFS_I(inode)->rsrc_inode;
|
|
if (atomic_dec_and_test(&HFS_I(inode)->opencnt)) {
|
|
mutex_lock(&inode->i_mutex);
|
|
hfs_file_truncate(inode);
|
|
//if (inode->i_flags & S_DEAD) {
|
|
// hfs_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
|
|
// hfs_delete_inode(inode);
|
|
//}
|
|
mutex_unlock(&inode->i_mutex);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* hfs_notify_change()
|
|
*
|
|
* Based very closely on fs/msdos/inode.c by Werner Almesberger
|
|
*
|
|
* This is the notify_change() field in the super_operations structure
|
|
* for HFS file systems. The purpose is to take that changes made to
|
|
* an inode and apply then in a filesystem-dependent manner. In this
|
|
* case the process has a few of tasks to do:
|
|
* 1) prevent changes to the i_uid and i_gid fields.
|
|
* 2) map file permissions to the closest allowable permissions
|
|
* 3) Since multiple Linux files can share the same on-disk inode under
|
|
* HFS (for instance the data and resource forks of a file) a change
|
|
* to permissions must be applied to all other in-core inodes which
|
|
* correspond to the same HFS file.
|
|
*/
|
|
|
|
int hfs_inode_setattr(struct dentry *dentry, struct iattr * attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
struct hfs_sb_info *hsb = HFS_SB(inode->i_sb);
|
|
int error;
|
|
|
|
error = inode_change_ok(inode, attr); /* basic permission checks */
|
|
if (error)
|
|
return error;
|
|
|
|
/* no uig/gid changes and limit which mode bits can be set */
|
|
if (((attr->ia_valid & ATTR_UID) &&
|
|
(!uid_eq(attr->ia_uid, hsb->s_uid))) ||
|
|
((attr->ia_valid & ATTR_GID) &&
|
|
(!gid_eq(attr->ia_gid, hsb->s_gid))) ||
|
|
((attr->ia_valid & ATTR_MODE) &&
|
|
((S_ISDIR(inode->i_mode) &&
|
|
(attr->ia_mode != inode->i_mode)) ||
|
|
(attr->ia_mode & ~HFS_VALID_MODE_BITS)))) {
|
|
return hsb->s_quiet ? 0 : error;
|
|
}
|
|
|
|
if (attr->ia_valid & ATTR_MODE) {
|
|
/* Only the 'w' bits can ever change and only all together. */
|
|
if (attr->ia_mode & S_IWUSR)
|
|
attr->ia_mode = inode->i_mode | S_IWUGO;
|
|
else
|
|
attr->ia_mode = inode->i_mode & ~S_IWUGO;
|
|
attr->ia_mode &= S_ISDIR(inode->i_mode) ? ~hsb->s_dir_umask: ~hsb->s_file_umask;
|
|
}
|
|
|
|
if ((attr->ia_valid & ATTR_SIZE) &&
|
|
attr->ia_size != i_size_read(inode)) {
|
|
inode_dio_wait(inode);
|
|
|
|
error = inode_newsize_ok(inode, attr->ia_size);
|
|
if (error)
|
|
return error;
|
|
|
|
truncate_setsize(inode, attr->ia_size);
|
|
hfs_file_truncate(inode);
|
|
}
|
|
|
|
setattr_copy(inode, attr);
|
|
mark_inode_dirty(inode);
|
|
return 0;
|
|
}
|
|
|
|
static int hfs_file_fsync(struct file *filp, loff_t start, loff_t end,
|
|
int datasync)
|
|
{
|
|
struct inode *inode = filp->f_mapping->host;
|
|
struct super_block * sb;
|
|
int ret, err;
|
|
|
|
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
|
|
if (ret)
|
|
return ret;
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
/* sync the inode to buffers */
|
|
ret = write_inode_now(inode, 0);
|
|
|
|
/* sync the superblock to buffers */
|
|
sb = inode->i_sb;
|
|
flush_delayed_work(&HFS_SB(sb)->mdb_work);
|
|
/* .. finally sync the buffers to disk */
|
|
err = sync_blockdev(sb->s_bdev);
|
|
if (!ret)
|
|
ret = err;
|
|
mutex_unlock(&inode->i_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static const struct file_operations hfs_file_operations = {
|
|
.llseek = generic_file_llseek,
|
|
.read_iter = generic_file_read_iter,
|
|
.write_iter = generic_file_write_iter,
|
|
.mmap = generic_file_mmap,
|
|
.splice_read = generic_file_splice_read,
|
|
.fsync = hfs_file_fsync,
|
|
.open = hfs_file_open,
|
|
.release = hfs_file_release,
|
|
};
|
|
|
|
static const struct inode_operations hfs_file_inode_operations = {
|
|
.lookup = hfs_file_lookup,
|
|
.setattr = hfs_inode_setattr,
|
|
.setxattr = hfs_setxattr,
|
|
.getxattr = hfs_getxattr,
|
|
.listxattr = hfs_listxattr,
|
|
};
|