![Linus Torvalds](/assets/img/avatar_default.png)
This is a late set of changes from Deepa Dinamani doing an automated treewide conversion of the inode and iattr structures from 'timespec' to 'timespec64', to push the conversion from the VFS layer into the individual file systems. There were no conflicts between this and the contents of linux-next until just before the merge window, when we saw multiple problems: - A minor conflict with my own y2038 fixes, which I could address by adding another patch on top here. - One semantic conflict with late changes to the NFS tree. I addressed this by merging Deepa's original branch on top of the changes that now got merged into mainline and making sure the merge commit includes the necessary changes as produced by coccinelle. - A trivial conflict against the removal of staging/lustre. - Multiple conflicts against the VFS changes in the overlayfs tree. These are still part of linux-next, but apparently this is no longer intended for 4.18 [1], so I am ignoring that part. As Deepa writes: The series aims to switch vfs timestamps to use struct timespec64. Currently vfs uses struct timespec, which is not y2038 safe. The series involves the following: 1. Add vfs helper functions for supporting struct timepec64 timestamps. 2. Cast prints of vfs timestamps to avoid warnings after the switch. 3. Simplify code using vfs timestamps so that the actual replacement becomes easy. 4. Convert vfs timestamps to use struct timespec64 using a script. This is a flag day patch. Next steps: 1. Convert APIs that can handle timespec64, instead of converting timestamps at the boundaries. 2. Update internal data structures to avoid timestamp conversions. Thomas Gleixner adds: I think there is no point to drag that out for the next merge window. The whole thing needs to be done in one go for the core changes which means that you're going to play that catchup game forever. Let's get over with it towards the end of the merge window. [1] https://www.spinics.net/lists/linux-fsdevel/msg128294.html -----BEGIN PGP SIGNATURE----- Version: GnuPG v1 iQIcBAABAgAGBQJbInZAAAoJEGCrR//JCVInReoQAIlVIIMt5ZX6wmaKbrjy9Itf MfgbFihQ/djLnuSPVQ3nztcxF0d66BKHZ9puVjz6+mIHqfDvJTRwZs9nU+sOF/T1 g78fRkM1cxq6ZCkGYAbzyjyo5aC4PnSMP/NQLmwqvi0MXqqrbDoq5ZdP9DHJw39h L9lD8FM/P7T29Fgp9tq/pT5l9X8VU8+s5KQG1uhB5hii4VL6pD6JyLElDita7rg+ Z7/V7jkxIGEUWF7vGaiR1QTFzEtpUA/exDf9cnsf51OGtK/LJfQ0oiZPPuq3oA/E LSbt8YQQObc+dvfnGxwgxEg1k5WP5ekj/Wdibv/+rQKgGyLOTz6Q4xK6r8F2ahxs nyZQBdXqHhJYyKr1H1reUH3mrSgQbE5U5R1i3My0xV2dSn+vtK5vgF21v2Ku3A1G wJratdtF/kVBzSEQUhsYTw14Un+xhBLRWzcq0cELonqxaKvRQK9r92KHLIWNE7/v c0TmhFbkZA+zR8HdsaL3iYf1+0W/eYy8PcvepyldKNeW2pVk3CyvdTfY2Z87G2XK tIkK+BUWbG3drEGG3hxZ3757Ln3a9qWyC5ruD3mBVkuug/wekbI8PykYJS7Mx4s/ WNXl0dAL0Eeu1M8uEJejRAe1Q3eXoMWZbvCYZc+wAm92pATfHVcKwPOh8P7NHlfy A3HkjIBrKW5AgQDxfgvm =CZX2 -----END PGP SIGNATURE----- Merge tag 'vfs-timespec64' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground Pull inode timestamps conversion to timespec64 from Arnd Bergmann: "This is a late set of changes from Deepa Dinamani doing an automated treewide conversion of the inode and iattr structures from 'timespec' to 'timespec64', to push the conversion from the VFS layer into the individual file systems. As Deepa writes: 'The series aims to switch vfs timestamps to use struct timespec64. Currently vfs uses struct timespec, which is not y2038 safe. The series involves the following: 1. Add vfs helper functions for supporting struct timepec64 timestamps. 2. Cast prints of vfs timestamps to avoid warnings after the switch. 3. Simplify code using vfs timestamps so that the actual replacement becomes easy. 4. Convert vfs timestamps to use struct timespec64 using a script. This is a flag day patch. Next steps: 1. Convert APIs that can handle timespec64, instead of converting timestamps at the boundaries. 2. Update internal data structures to avoid timestamp conversions' Thomas Gleixner adds: 'I think there is no point to drag that out for the next merge window. The whole thing needs to be done in one go for the core changes which means that you're going to play that catchup game forever. Let's get over with it towards the end of the merge window'" * tag 'vfs-timespec64' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/playground: pstore: Remove bogus format string definition vfs: change inode times to use struct timespec64 pstore: Convert internal records to timespec64 udf: Simplify calls to udf_disk_stamp_to_time fs: nfs: get rid of memcpys for inode times ceph: make inode time prints to be long long lustre: Use long long type to print inode time fs: add timespec64_truncate()
694 lines
18 KiB
C
694 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/cred.h>
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#include <linux/uio.h>
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#include <linux/xattr.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_SIZE) {
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nidx = page->index >> (tree->node_size_shift - PAGE_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_SHIFT - tree->node_size_shift);
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i = 1 << (PAGE_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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{
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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 = 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, 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 = iocb->ki_pos + 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, const 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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spin_lock_init(&HFS_I(inode)->open_dir_lock);
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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(inode);
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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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spin_lock_init(&HFS_I(inode)->open_dir_lock);
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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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timespec_to_timespec64(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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timespec_to_timespec64(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);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* __hfs_iget()
|
|
*
|
|
* Given the MDB for a HFS filesystem, a 'key' and an 'entry' in
|
|
* the catalog B-tree and the 'type' of the desired file return the
|
|
* inode for that file/directory or NULL. Note that 'type' indicates
|
|
* whether we want the actual file or directory, or the corresponding
|
|
* metadata (AppleDouble header file or CAP metadata file).
|
|
*/
|
|
struct inode *hfs_iget(struct super_block *sb, struct hfs_cat_key *key, hfs_cat_rec *rec)
|
|
{
|
|
struct hfs_iget_data data = { key, rec };
|
|
struct inode *inode;
|
|
u32 cnid;
|
|
|
|
switch (rec->type) {
|
|
case HFS_CDR_DIR:
|
|
cnid = be32_to_cpu(rec->dir.DirID);
|
|
break;
|
|
case HFS_CDR_FIL:
|
|
cnid = be32_to_cpu(rec->file.FlNum);
|
|
break;
|
|
default:
|
|
return NULL;
|
|
}
|
|
inode = iget5_locked(sb, cnid, hfs_test_inode, hfs_read_inode, &data);
|
|
if (inode && (inode->i_state & I_NEW))
|
|
unlock_new_inode(inode);
|
|
return inode;
|
|
}
|
|
|
|
void hfs_inode_write_fork(struct inode *inode, struct hfs_extent *ext,
|
|
__be32 *log_size, __be32 *phys_size)
|
|
{
|
|
memcpy(ext, HFS_I(inode)->first_extents, sizeof(hfs_extent_rec));
|
|
|
|
if (log_size)
|
|
*log_size = cpu_to_be32(inode->i_size);
|
|
if (phys_size)
|
|
*phys_size = cpu_to_be32(HFS_I(inode)->alloc_blocks *
|
|
HFS_SB(inode->i_sb)->alloc_blksz);
|
|
}
|
|
|
|
int hfs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
struct inode *main_inode = inode;
|
|
struct hfs_find_data fd;
|
|
hfs_cat_rec rec;
|
|
int res;
|
|
|
|
hfs_dbg(INODE, "hfs_write_inode: %lu\n", inode->i_ino);
|
|
res = hfs_ext_write_extent(inode);
|
|
if (res)
|
|
return res;
|
|
|
|
if (inode->i_ino < HFS_FIRSTUSER_CNID) {
|
|
switch (inode->i_ino) {
|
|
case HFS_ROOT_CNID:
|
|
break;
|
|
case HFS_EXT_CNID:
|
|
hfs_btree_write(HFS_SB(inode->i_sb)->ext_tree);
|
|
return 0;
|
|
case HFS_CAT_CNID:
|
|
hfs_btree_write(HFS_SB(inode->i_sb)->cat_tree);
|
|
return 0;
|
|
default:
|
|
BUG();
|
|
return -EIO;
|
|
}
|
|
}
|
|
|
|
if (HFS_IS_RSRC(inode))
|
|
main_inode = HFS_I(inode)->rsrc_inode;
|
|
|
|
if (!main_inode->i_nlink)
|
|
return 0;
|
|
|
|
if (hfs_find_init(HFS_SB(main_inode->i_sb)->cat_tree, &fd))
|
|
/* panic? */
|
|
return -EIO;
|
|
|
|
fd.search_key->cat = HFS_I(main_inode)->cat_key;
|
|
if (hfs_brec_find(&fd))
|
|
/* panic? */
|
|
goto out;
|
|
|
|
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);
|
|
dont_mount(dentry);
|
|
out:
|
|
return d_splice_alias(inode, dentry);
|
|
}
|
|
|
|
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)) {
|
|
inode_lock(inode);
|
|
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);
|
|
//}
|
|
inode_unlock(inode);
|
|
}
|
|
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 = setattr_prepare(dentry, 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 = file_write_and_wait_range(filp, start, end);
|
|
if (ret)
|
|
return ret;
|
|
inode_lock(inode);
|
|
|
|
/* 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;
|
|
inode_unlock(inode);
|
|
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,
|
|
.listxattr = generic_listxattr,
|
|
};
|