1 files changed, 555 insertions, 0 deletions

diff --git a/fs/hfsplus/inode.c b/fs/hfsplus/inode.c
new file mode 100644
index 000000000000..d5642705f633
--- /dev/null
+++ b/fs/hfsplus/inode.c
@@ -0,0 +1,555 @@
+/*
+ *  linux/fs/hfsplus/inode.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Inode handling routines
+ */
+
+#include <linux/mm.h>
+#include <linux/fs.h>
+#include <linux/pagemap.h>
+#include <linux/version.h>
+#include <linux/mpage.h>
+
+#include "hfsplus_fs.h"
+#include "hfsplus_raw.h"
+
+static int hfsplus_readpage(struct file *file, struct page *page)
+{
+	//printk("readpage: %lu\n", page->index);
+	return block_read_full_page(page, hfsplus_get_block);
+}
+
+static int hfsplus_writepage(struct page *page, struct writeback_control *wbc)
+{
+	//printk("writepage: %lu\n", page->index);
+	return block_write_full_page(page, hfsplus_get_block, wbc);
+}
+
+static int hfsplus_prepare_write(struct file *file, struct page *page, unsigned from, unsigned to)
+{
+	return cont_prepare_write(page, from, to, hfsplus_get_block,
+		&HFSPLUS_I(page->mapping->host).phys_size);
+}
+
+static sector_t hfsplus_bmap(struct address_space *mapping, sector_t block)
+{
+	return generic_block_bmap(mapping, block, hfsplus_get_block);
+}
+
+static int hfsplus_releasepage(struct page *page, int mask)
+{
+	struct inode *inode = page->mapping->host;
+	struct super_block *sb = inode->i_sb;
+	struct hfs_btree *tree;
+	struct hfs_bnode *node;
+	u32 nidx;
+	int i, res = 1;
+
+	switch (inode->i_ino) {
+	case HFSPLUS_EXT_CNID:
+		tree = HFSPLUS_SB(sb).ext_tree;
+		break;
+	case HFSPLUS_CAT_CNID:
+		tree = HFSPLUS_SB(sb).cat_tree;
+		break;
+	case HFSPLUS_ATTR_CNID:
+		tree = HFSPLUS_SB(sb).attr_tree;
+		break;
+	default:
+		BUG();
+		return 0;
+	}
+	if (tree->node_size >= PAGE_CACHE_SIZE) {
+		nidx = page->index >> (tree->node_size_shift - PAGE_CACHE_SHIFT);
+		spin_lock(&tree->hash_lock);
+		node = hfs_bnode_findhash(tree, nidx);
+		if (!node)
+			;
+		else if (atomic_read(&node->refcnt))
+			res = 0;
+		if (res && node) {
+			hfs_bnode_unhash(node);
+			hfs_bnode_free(node);
+		}
+		spin_unlock(&tree->hash_lock);
+	} else {
+		nidx = page->index << (PAGE_CACHE_SHIFT - tree->node_size_shift);
+		i = 1 << (PAGE_CACHE_SHIFT - tree->node_size_shift);
+		spin_lock(&tree->hash_lock);
+		do {
+			node = hfs_bnode_findhash(tree, nidx++);
+			if (!node)
+				continue;
+			if (atomic_read(&node->refcnt)) {
+				res = 0;
+				break;
+			}
+			hfs_bnode_unhash(node);
+			hfs_bnode_free(node);
+		} while (--i && nidx < tree->node_count);
+		spin_unlock(&tree->hash_lock);
+	}
+	//printk("releasepage: %lu,%x = %d\n", page->index, mask, res);
+	return res ? try_to_free_buffers(page) : 0;
+}
+
+static int hfsplus_get_blocks(struct inode *inode, sector_t iblock, unsigned long max_blocks,
+			      struct buffer_head *bh_result, int create)
+{
+	int ret;
+
+	ret = hfsplus_get_block(inode, iblock, bh_result, create);
+	if (!ret)
+		bh_result->b_size = (1 << inode->i_blkbits);
+	return ret;
+}
+
+static ssize_t hfsplus_direct_IO(int rw, struct kiocb *iocb,
+		const struct iovec *iov, loff_t offset, unsigned long nr_segs)
+{
+	struct file *file = iocb->ki_filp;
+	struct inode *inode = file->f_dentry->d_inode->i_mapping->host;
+
+	return blockdev_direct_IO(rw, iocb, inode, inode->i_sb->s_bdev, iov,
+				  offset, nr_segs, hfsplus_get_blocks, NULL);
+}
+
+static int hfsplus_writepages(struct address_space *mapping,
+			      struct writeback_control *wbc)
+{
+	return mpage_writepages(mapping, wbc, hfsplus_get_block);
+}
+
+struct address_space_operations hfsplus_btree_aops = {
+	.readpage	= hfsplus_readpage,
+	.writepage	= hfsplus_writepage,
+	.sync_page	= block_sync_page,
+	.prepare_write	= hfsplus_prepare_write,
+	.commit_write	= generic_commit_write,
+	.bmap		= hfsplus_bmap,
+	.releasepage	= hfsplus_releasepage,
+};
+
+struct address_space_operations hfsplus_aops = {
+	.readpage	= hfsplus_readpage,
+	.writepage	= hfsplus_writepage,
+	.sync_page	= block_sync_page,
+	.prepare_write	= hfsplus_prepare_write,
+	.commit_write	= generic_commit_write,
+	.bmap		= hfsplus_bmap,
+	.direct_IO	= hfsplus_direct_IO,
+	.writepages	= hfsplus_writepages,
+};
+
+static struct dentry *hfsplus_file_lookup(struct inode *dir, struct dentry *dentry,
+					  struct nameidata *nd)
+{
+	struct hfs_find_data fd;
+	struct super_block *sb = dir->i_sb;
+	struct inode *inode = NULL;
+	int err;
+
+	if (HFSPLUS_IS_RSRC(dir) || strcmp(dentry->d_name.name, "rsrc"))
+		goto out;
+
+	inode = HFSPLUS_I(dir).rsrc_inode;
+	if (inode)
+		goto out;
+
+	inode = new_inode(sb);
+	if (!inode)
+		return ERR_PTR(-ENOMEM);
+
+	inode->i_ino = dir->i_ino;
+	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
+	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+	HFSPLUS_I(inode).flags = HFSPLUS_FLG_RSRC;
+
+	hfs_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
+	err = hfsplus_find_cat(sb, dir->i_ino, &fd);
+	if (!err)
+		err = hfsplus_cat_read_inode(inode, &fd);
+	hfs_find_exit(&fd);
+	if (err) {
+		iput(inode);
+		return ERR_PTR(err);
+	}
+	HFSPLUS_I(inode).rsrc_inode = dir;
+	HFSPLUS_I(dir).rsrc_inode = inode;
+	igrab(dir);
+	hlist_add_head(&inode->i_hash, &HFSPLUS_SB(sb).rsrc_inodes);
+	mark_inode_dirty(inode);
+	{
+	void hfsplus_inode_check(struct super_block *sb);
+	atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
+	hfsplus_inode_check(sb);
+	}
+out:
+	d_add(dentry, inode);
+	return NULL;
+}
+
+static void hfsplus_get_perms(struct inode *inode, struct hfsplus_perm *perms, int dir)
+{
+	struct super_block *sb = inode->i_sb;
+	u16 mode;
+
+	mode = be16_to_cpu(perms->mode);
+
+	inode->i_uid = be32_to_cpu(perms->owner);
+	if (!inode->i_uid && !mode)
+		inode->i_uid = HFSPLUS_SB(sb).uid;
+
+	inode->i_gid = be32_to_cpu(perms->group);
+	if (!inode->i_gid && !mode)
+		inode->i_gid = HFSPLUS_SB(sb).gid;
+
+	if (dir) {
+		mode = mode ? (mode & S_IALLUGO) :
+			(S_IRWXUGO & ~(HFSPLUS_SB(sb).umask));
+		mode |= S_IFDIR;
+	} else if (!mode)
+		mode = S_IFREG | ((S_IRUGO|S_IWUGO) &
+			~(HFSPLUS_SB(sb).umask));
+	inode->i_mode = mode;
+
+	HFSPLUS_I(inode).rootflags = perms->rootflags;
+	HFSPLUS_I(inode).userflags = perms->userflags;
+	if (perms->rootflags & HFSPLUS_FLG_IMMUTABLE)
+		inode->i_flags |= S_IMMUTABLE;
+	else
+		inode->i_flags &= ~S_IMMUTABLE;
+	if (perms->rootflags & HFSPLUS_FLG_APPEND)
+		inode->i_flags |= S_APPEND;
+	else
+		inode->i_flags &= ~S_APPEND;
+}
+
+static void hfsplus_set_perms(struct inode *inode, struct hfsplus_perm *perms)
+{
+	if (inode->i_flags & S_IMMUTABLE)
+		perms->rootflags |= HFSPLUS_FLG_IMMUTABLE;
+	else
+		perms->rootflags &= ~HFSPLUS_FLG_IMMUTABLE;
+	if (inode->i_flags & S_APPEND)
+		perms->rootflags |= HFSPLUS_FLG_APPEND;
+	else
+		perms->rootflags &= ~HFSPLUS_FLG_APPEND;
+	perms->userflags = HFSPLUS_I(inode).userflags;
+	perms->mode = cpu_to_be16(inode->i_mode);
+	perms->owner = cpu_to_be32(inode->i_uid);
+	perms->group = cpu_to_be32(inode->i_gid);
+	perms->dev = cpu_to_be32(HFSPLUS_I(inode).dev);
+}
+
+static int hfsplus_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+	/* MAY_EXEC is also used for lookup, if no x bit is set allow lookup,
+	 * open_exec has the same test, so it's still not executable, if a x bit
+	 * is set fall back to standard permission check.
+	 */
+	if (S_ISREG(inode->i_mode) && mask & MAY_EXEC && !(inode->i_mode & 0111))
+		return 0;
+	return generic_permission(inode, mask, NULL);
+}
+
+
+static int hfsplus_file_open(struct inode *inode, struct file *file)
+{
+	if (HFSPLUS_IS_RSRC(inode))
+		inode = HFSPLUS_I(inode).rsrc_inode;
+	if (atomic_read(&file->f_count) != 1)
+		return 0;
+	atomic_inc(&HFSPLUS_I(inode).opencnt);
+	return 0;
+}
+
+static int hfsplus_file_release(struct inode *inode, struct file *file)
+{
+	struct super_block *sb = inode->i_sb;
+
+	if (HFSPLUS_IS_RSRC(inode))
+		inode = HFSPLUS_I(inode).rsrc_inode;
+	if (atomic_read(&file->f_count) != 0)
+		return 0;
+	if (atomic_dec_and_test(&HFSPLUS_I(inode).opencnt)) {
+		down(&inode->i_sem);
+		hfsplus_file_truncate(inode);
+		if (inode->i_flags & S_DEAD) {
+			hfsplus_delete_cat(inode->i_ino, HFSPLUS_SB(sb).hidden_dir, NULL);
+			hfsplus_delete_inode(inode);
+		}
+		up(&inode->i_sem);
+	}
+	return 0;
+}
+
+extern struct inode_operations hfsplus_dir_inode_operations;
+extern struct file_operations hfsplus_dir_operations;
+
+static struct inode_operations hfsplus_file_inode_operations = {
+	.lookup		= hfsplus_file_lookup,
+	.truncate	= hfsplus_file_truncate,
+	.permission	= hfsplus_permission,
+	.setxattr	= hfsplus_setxattr,
+	.getxattr	= hfsplus_getxattr,
+	.listxattr	= hfsplus_listxattr,
+};
+
+static struct file_operations hfsplus_file_operations = {
+	.llseek 	= generic_file_llseek,
+	.read		= generic_file_read,
+	.write		= generic_file_write,
+	.mmap		= generic_file_mmap,
+	.sendfile	= generic_file_sendfile,
+	.fsync		= file_fsync,
+	.open		= hfsplus_file_open,
+	.release	= hfsplus_file_release,
+	.ioctl          = hfsplus_ioctl,
+};
+
+struct inode *hfsplus_new_inode(struct super_block *sb, int mode)
+{
+	struct inode *inode = new_inode(sb);
+	if (!inode)
+		return NULL;
+
+	{
+	void hfsplus_inode_check(struct super_block *sb);
+	atomic_inc(&HFSPLUS_SB(sb).inode_cnt);
+	hfsplus_inode_check(sb);
+	}
+	inode->i_ino = HFSPLUS_SB(sb).next_cnid++;
+	inode->i_mode = mode;
+	inode->i_uid = current->fsuid;
+	inode->i_gid = current->fsgid;
+	inode->i_nlink = 1;
+	inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME_SEC;
+	inode->i_blksize = HFSPLUS_SB(sb).alloc_blksz;
+	INIT_LIST_HEAD(&HFSPLUS_I(inode).open_dir_list);
+	init_MUTEX(&HFSPLUS_I(inode).extents_lock);
+	atomic_set(&HFSPLUS_I(inode).opencnt, 0);
+	HFSPLUS_I(inode).flags = 0;
+	memset(HFSPLUS_I(inode).first_extents, 0, sizeof(hfsplus_extent_rec));
+	memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
+	HFSPLUS_I(inode).alloc_blocks = 0;
+	HFSPLUS_I(inode).first_blocks = 0;
+	HFSPLUS_I(inode).cached_start = 0;
+	HFSPLUS_I(inode).cached_blocks = 0;
+	HFSPLUS_I(inode).phys_size = 0;
+	HFSPLUS_I(inode).fs_blocks = 0;
+	HFSPLUS_I(inode).rsrc_inode = NULL;
+	if (S_ISDIR(inode->i_mode)) {
+		inode->i_size = 2;
+		HFSPLUS_SB(sb).folder_count++;
+		inode->i_op = &hfsplus_dir_inode_operations;
+		inode->i_fop = &hfsplus_dir_operations;
+	} else if (S_ISREG(inode->i_mode)) {
+		HFSPLUS_SB(sb).file_count++;
+		inode->i_op = &hfsplus_file_inode_operations;
+		inode->i_fop = &hfsplus_file_operations;
+		inode->i_mapping->a_ops = &hfsplus_aops;
+		HFSPLUS_I(inode).clump_blocks = HFSPLUS_SB(sb).data_clump_blocks;
+	} else if (S_ISLNK(inode->i_mode)) {
+		HFSPLUS_SB(sb).file_count++;
+		inode->i_op = &page_symlink_inode_operations;
+		inode->i_mapping->a_ops = &hfsplus_aops;
+		HFSPLUS_I(inode).clump_blocks = 1;
+	} else
+		HFSPLUS_SB(sb).file_count++;
+	insert_inode_hash(inode);
+	mark_inode_dirty(inode);
+	sb->s_dirt = 1;
+
+	return inode;
+}
+
+void hfsplus_delete_inode(struct inode *inode)
+{
+	struct super_block *sb = inode->i_sb;
+
+	if (S_ISDIR(inode->i_mode)) {
+		HFSPLUS_SB(sb).folder_count--;
+		sb->s_dirt = 1;
+		return;
+	}
+	HFSPLUS_SB(sb).file_count--;
+	if (S_ISREG(inode->i_mode)) {
+		if (!inode->i_nlink) {
+			inode->i_size = 0;
+			hfsplus_file_truncate(inode);
+		}
+	} else if (S_ISLNK(inode->i_mode)) {
+		inode->i_size = 0;
+		hfsplus_file_truncate(inode);
+	}
+	sb->s_dirt = 1;
+}
+
+void hfsplus_inode_read_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
+{
+	struct super_block *sb = inode->i_sb;
+	u32 count;
+	int i;
+
+	memcpy(&HFSPLUS_I(inode).first_extents, &fork->extents,
+	       sizeof(hfsplus_extent_rec));
+	for (count = 0, i = 0; i < 8; i++)
+		count += be32_to_cpu(fork->extents[i].block_count);
+	HFSPLUS_I(inode).first_blocks = count;
+	memset(HFSPLUS_I(inode).cached_extents, 0, sizeof(hfsplus_extent_rec));
+	HFSPLUS_I(inode).cached_start = 0;
+	HFSPLUS_I(inode).cached_blocks = 0;
+
+	HFSPLUS_I(inode).alloc_blocks = be32_to_cpu(fork->total_blocks);
+	inode->i_size = HFSPLUS_I(inode).phys_size = be64_to_cpu(fork->total_size);
+	HFSPLUS_I(inode).fs_blocks = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+	inode_set_bytes(inode, HFSPLUS_I(inode).fs_blocks << sb->s_blocksize_bits);
+	HFSPLUS_I(inode).clump_blocks = be32_to_cpu(fork->clump_size) >> HFSPLUS_SB(sb).alloc_blksz_shift;
+	if (!HFSPLUS_I(inode).clump_blocks)
+		HFSPLUS_I(inode).clump_blocks = HFSPLUS_IS_RSRC(inode) ? HFSPLUS_SB(sb).rsrc_clump_blocks :
+				HFSPLUS_SB(sb).data_clump_blocks;
+}
+
+void hfsplus_inode_write_fork(struct inode *inode, struct hfsplus_fork_raw *fork)
+{
+	memcpy(&fork->extents, &HFSPLUS_I(inode).first_extents,
+	       sizeof(hfsplus_extent_rec));
+	fork->total_size = cpu_to_be64(inode->i_size);
+	fork->total_blocks = cpu_to_be32(HFSPLUS_I(inode).alloc_blocks);
+}
+
+int hfsplus_cat_read_inode(struct inode *inode, struct hfs_find_data *fd)
+{
+	hfsplus_cat_entry entry;
+	int res = 0;
+	u16 type;
+
+	type = hfs_bnode_read_u16(fd->bnode, fd->entryoffset);
+
+	HFSPLUS_I(inode).dev = 0;
+	inode->i_blksize = HFSPLUS_SB(inode->i_sb).alloc_blksz;
+	if (type == HFSPLUS_FOLDER) {
+		struct hfsplus_cat_folder *folder = &entry.folder;
+
+		if (fd->entrylength < sizeof(struct hfsplus_cat_folder))
+			/* panic? */;
+		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
+					sizeof(struct hfsplus_cat_folder));
+		hfsplus_get_perms(inode, &folder->permissions, 1);
+		inode->i_nlink = 1;
+		inode->i_size = 2 + be32_to_cpu(folder->valence);
+		inode->i_atime = hfsp_mt2ut(folder->access_date);
+		inode->i_mtime = hfsp_mt2ut(folder->content_mod_date);
+		inode->i_ctime = inode->i_mtime;
+		HFSPLUS_I(inode).fs_blocks = 0;
+		inode->i_op = &hfsplus_dir_inode_operations;
+		inode->i_fop = &hfsplus_dir_operations;
+	} else if (type == HFSPLUS_FILE) {
+		struct hfsplus_cat_file *file = &entry.file;
+
+		if (fd->entrylength < sizeof(struct hfsplus_cat_file))
+			/* panic? */;
+		hfs_bnode_read(fd->bnode, &entry, fd->entryoffset,
+					sizeof(struct hfsplus_cat_file));
+
+		hfsplus_inode_read_fork(inode, HFSPLUS_IS_DATA(inode) ?
+					&file->data_fork : &file->rsrc_fork);
+		hfsplus_get_perms(inode, &file->permissions, 0);
+		inode->i_nlink = 1;
+		if (S_ISREG(inode->i_mode)) {
+			if (file->permissions.dev)
+				inode->i_nlink = be32_to_cpu(file->permissions.dev);
+			inode->i_op = &hfsplus_file_inode_operations;
+			inode->i_fop = &hfsplus_file_operations;
+			inode->i_mapping->a_ops = &hfsplus_aops;
+		} else if (S_ISLNK(inode->i_mode)) {
+			inode->i_op = &page_symlink_inode_operations;
+			inode->i_mapping->a_ops = &hfsplus_aops;
+		} else {
+			init_special_inode(inode, inode->i_mode,
+					   be32_to_cpu(file->permissions.dev));
+		}
+		inode->i_atime = hfsp_mt2ut(file->access_date);
+		inode->i_mtime = hfsp_mt2ut(file->content_mod_date);
+		inode->i_ctime = inode->i_mtime;
+	} else {
+		printk("HFS+-fs: bad catalog entry used to create inode\n");
+		res = -EIO;
+	}
+	return res;
+}
+
+int hfsplus_cat_write_inode(struct inode *inode)
+{
+	struct inode *main_inode = inode;
+	struct hfs_find_data fd;
+	hfsplus_cat_entry entry;
+
+	if (HFSPLUS_IS_RSRC(inode))
+		main_inode = HFSPLUS_I(inode).rsrc_inode;
+
+	if (!main_inode->i_nlink)
+		return 0;
+
+	if (hfs_find_init(HFSPLUS_SB(main_inode->i_sb).cat_tree, &fd))
+		/* panic? */
+		return -EIO;
+
+	if (hfsplus_find_cat(main_inode->i_sb, main_inode->i_ino, &fd))
+		/* panic? */
+		goto out;
+
+	if (S_ISDIR(main_inode->i_mode)) {
+		struct hfsplus_cat_folder *folder = &entry.folder;
+
+		if (fd.entrylength < sizeof(struct hfsplus_cat_folder))
+			/* panic? */;
+		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
+					sizeof(struct hfsplus_cat_folder));
+		/* simple node checks? */
+		hfsplus_set_perms(inode, &folder->permissions);
+		folder->access_date = hfsp_ut2mt(inode->i_atime);
+		folder->content_mod_date = hfsp_ut2mt(inode->i_mtime);
+		folder->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
+		folder->valence = cpu_to_be32(inode->i_size - 2);
+		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
+					 sizeof(struct hfsplus_cat_folder));
+	} else if (HFSPLUS_IS_RSRC(inode)) {
+		struct hfsplus_cat_file *file = &entry.file;
+		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
+			       sizeof(struct hfsplus_cat_file));
+		hfsplus_inode_write_fork(inode, &file->rsrc_fork);
+		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
+				sizeof(struct hfsplus_cat_file));
+	} else {
+		struct hfsplus_cat_file *file = &entry.file;
+
+		if (fd.entrylength < sizeof(struct hfsplus_cat_file))
+			/* panic? */;
+		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
+					sizeof(struct hfsplus_cat_file));
+		hfsplus_inode_write_fork(inode, &file->data_fork);
+		if (S_ISREG(inode->i_mode))
+			HFSPLUS_I(inode).dev = inode->i_nlink;
+		if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
+			HFSPLUS_I(inode).dev = kdev_t_to_nr(inode->i_rdev);
+		hfsplus_set_perms(inode, &file->permissions);
+		if ((file->permissions.rootflags | file->permissions.userflags) & HFSPLUS_FLG_IMMUTABLE)
+			file->flags |= cpu_to_be16(HFSPLUS_FILE_LOCKED);
+		else
+			file->flags &= cpu_to_be16(~HFSPLUS_FILE_LOCKED);
+		file->access_date = hfsp_ut2mt(inode->i_atime);
+		file->content_mod_date = hfsp_ut2mt(inode->i_mtime);
+		file->attribute_mod_date = hfsp_ut2mt(inode->i_ctime);
+		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
+					 sizeof(struct hfsplus_cat_file));
+	}
+out:
+	hfs_find_exit(&fd);
+	return 0;
+}