patch-2.4.22 linux-2.4.22/fs/hfsplus/catalog.c

• Lines: 334
• Date: 2003-08-25 04:44:43.000000000 -0700
• Orig file: linux-2.4.21/fs/hfsplus/catalog.c
• Orig date: 1969-12-31 16:00:00.000000000 -0800

diff -urN linux-2.4.21/fs/hfsplus/catalog.c linux-2.4.22/fs/hfsplus/catalog.c
@@ -0,0 +1,333 @@
+/*
+ *  linux/fs/hfsplus/catalog.c
+ *
+ * Copyright (C) 2001
+ * Brad Boyer (flar@allandria.com)
+ * (C) 2003 Ardis Technologies <roman@ardistech.com>
+ *
+ * Handling of catalog records
+ */
+
+#include <linux/sched.h>
+
+#include "hfsplus_fs.h"
+#include "hfsplus_raw.h"
+
+int hfsplus_cmp_cat_key(hfsplus_btree_key *k1, hfsplus_btree_key *k2)
+{
+	u32 k1p, k2p;
+
+	k1p = k1->cat.parent;
+	k2p = k2->cat.parent;
+	if (k1p != k2p)
+		return be32_to_cpu(k1p) < be32_to_cpu(k2p) ? -1 : 1;
+
+	return hfsplus_unistrcmp(&k1->cat.name, &k2->cat.name);
+}
+
+void hfsplus_fill_cat_key(hfsplus_btree_key *key, u32 parent,
+			  struct qstr *str)
+{
+	int len;
+
+	key->cat.parent = cpu_to_be32(parent);
+	if (str) {
+		hfsplus_asc2uni(&key->cat.name, str->name, str->len);
+		len = be16_to_cpu(key->cat.name.length);
+	} else
+		len = key->cat.name.length = 0;
+	key->key_len = cpu_to_be16(6 + 2 * len);
+}
+
+static void hfsplus_fill_cat_key_uni(hfsplus_btree_key *key, u32 parent,
+				     hfsplus_unistr *name)
+{
+	int ustrlen;
+
+	ustrlen = be16_to_cpu(name->length);
+	key->cat.parent = cpu_to_be32(parent);
+	key->cat.name.length = cpu_to_be16(ustrlen);
+	ustrlen *= 2;
+	memcpy(key->cat.name.unicode, name->unicode, ustrlen);
+	key->key_len = cpu_to_be16(6 + ustrlen);
+}
+
+static void hfsplus_set_perms(struct inode *inode, hfsplus_perm *perms)
+{
+	perms->mode = cpu_to_be32(inode->i_mode);
+	perms->owner = cpu_to_be32(inode->i_uid);
+	perms->group = cpu_to_be32(inode->i_gid);
+}
+
+static int hfsplus_fill_cat_entry(hfsplus_cat_entry *entry, u32 cnid, struct inode *inode)
+{
+	if (S_ISDIR(inode->i_mode)) {
+		hfsplus_cat_folder *folder;
+
+		folder = &entry->folder;
+		memset(folder, 0, sizeof(*folder));
+		folder->type = cpu_to_be16(HFSPLUS_FOLDER);
+		folder->id = cpu_to_be32(inode->i_ino);
+		folder->create_date = folder->content_mod_date = 
+			folder->attribute_mod_date = folder->access_date = 
+			hfsp_now2mt();
+		hfsplus_set_perms(inode, &folder->permissions);
+		if (inode == HFSPLUS_SB(inode->i_sb).hidden_dir)
+			/* invisible and namelocked */
+			folder->user_info.frFlags = cpu_to_be16(0x5000);
+		return sizeof(*folder);
+	} else {
+		hfsplus_cat_file *file;
+
+		file = &entry->file;
+		memset(file, 0, sizeof(*file));
+		file->type = cpu_to_be16(HFSPLUS_FILE);
+		file->id = cpu_to_be32(cnid);
+		file->create_date = file->content_mod_date =
+			file->attribute_mod_date = file->access_date =
+			hfsp_now2mt();
+		if (cnid == inode->i_ino) {
+			hfsplus_set_perms(inode, &file->permissions);
+			file->user_info.fdType = cpu_to_be32(HFSPLUS_SB(inode->i_sb).type);
+			file->user_info.fdCreator = cpu_to_be32(HFSPLUS_SB(inode->i_sb).creator);
+		} else {
+			file->user_info.fdType = cpu_to_be32(HFSP_HARDLINK_TYPE);
+			file->user_info.fdCreator = cpu_to_be32(HFSP_HFSPLUS_CREATOR);
+			file->user_info.fdFlags = cpu_to_be16(0x100);
+			file->permissions.dev = cpu_to_be32(HFSPLUS_I(inode).dev);
+		}
+		return sizeof(*file);
+	}
+}
+
+static int hfsplus_fill_cat_thread(hfsplus_cat_entry *entry, int type,
+				   u32 parentid, struct qstr *str)
+{
+	entry->type = cpu_to_be16(type);
+	entry->thread.reserved = 0;
+	entry->thread.parentID = cpu_to_be32(parentid);
+	hfsplus_asc2uni(&entry->thread.nodeName, str->name, str->len);
+	return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
+}
+
+/* Try to get a catalog entry for given catalog id */
+int hfsplus_find_cat(struct super_block *sb, unsigned long cnid,
+		     struct hfsplus_find_data *fd)
+{
+	hfsplus_cat_entry tmp;
+	int err;
+	u16 type;
+
+	hfsplus_fill_cat_key(fd->search_key, cnid, NULL);
+	err = hfsplus_btree_find_entry(fd, &tmp, sizeof(hfsplus_cat_entry));
+	if (err)
+		return err;
+
+	type = be16_to_cpu(tmp.type);
+	if (type != HFSPLUS_FOLDER_THREAD && type != HFSPLUS_FILE_THREAD) {
+		printk("HFS+-fs: Found bad thread record in catalog\n");
+		return -EIO;
+	}
+
+	hfsplus_fill_cat_key_uni(fd->search_key, be32_to_cpu(tmp.thread.parentID),
+				 &tmp.thread.nodeName);
+	return hfsplus_btree_find(fd);
+}
+
+int hfsplus_create_cat(u32 cnid, struct inode *dir, struct qstr *str, struct inode *inode)
+{
+	struct hfsplus_find_data fd;
+	struct super_block *sb;
+	hfsplus_cat_entry entry;
+	int entry_size;
+	int err;
+
+	dprint(DBG_CAT_MOD, "create_cat: %s,%u(%d)\n", str->name, cnid, inode->i_nlink);
+	sb = dir->i_sb;
+	hfsplus_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
+
+	hfsplus_fill_cat_key(fd.search_key, cnid, NULL);
+	entry_size = hfsplus_fill_cat_thread(&entry, S_ISDIR(inode->i_mode) ?
+			HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
+			dir->i_ino, str);
+	err = hfsplus_btree_find(&fd);
+	if (err != -ENOENT) {
+		if (!err)
+			err = -EEXIST;
+		goto out;
+	}
+	err = hfsplus_bnode_insert_rec(&fd, &entry, entry_size);
+	if (err)
+		goto out;
+
+	hfsplus_fill_cat_key(fd.search_key, dir->i_ino, str);
+	entry_size = hfsplus_fill_cat_entry(&entry, cnid, inode);
+	err = hfsplus_btree_find(&fd);
+	if (err != -ENOENT) {
+		/* panic? */
+		if (!err)
+			err = -EEXIST;
+		goto out;
+	}
+	err = hfsplus_bnode_insert_rec(&fd, &entry, entry_size);
+	if (!err) {
+		dir->i_size++;
+		mark_inode_dirty(dir);
+	}
+out:
+	hfsplus_find_exit(&fd);
+
+	return err;
+}
+
+int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
+{
+	struct super_block *sb;
+	struct hfsplus_find_data fd;
+	hfsplus_fork_raw fork;
+	struct list_head *pos;
+	int err, off;
+	u16 type;
+
+	dprint(DBG_CAT_MOD, "delete_cat: %s,%u\n", str ? str->name : NULL, cnid);
+	sb = dir->i_sb;
+	hfsplus_find_init(HFSPLUS_SB(sb).cat_tree, &fd);
+
+	if (!str) {
+		int len;
+
+		hfsplus_fill_cat_key(fd.search_key, cnid, NULL);
+		err = hfsplus_btree_find(&fd);
+		if (err)
+			goto out;
+
+		off = fd.entryoffset + offsetof(hfsplus_cat_thread, nodeName);
+		fd.search_key->cat.parent = cpu_to_be32(dir->i_ino);
+		hfsplus_bnode_readbytes(fd.bnode, &fd.search_key->cat.name.length, off, 2);
+		len = be16_to_cpu(fd.search_key->cat.name.length) * 2;
+		hfsplus_bnode_readbytes(fd.bnode, &fd.search_key->cat.name.unicode, off + 2, len);
+		fd.search_key->key_len = cpu_to_be16(6 + len);
+	} else
+		hfsplus_fill_cat_key(fd.search_key, dir->i_ino, str);
+
+	err = hfsplus_btree_find(&fd);
+	if (err)
+		goto out;
+
+	type = hfsplus_bnode_read_u16(fd.bnode, fd.entryoffset);
+	if (type == HFSPLUS_FILE) {
+#if 0
+		off = fd.entryoffset + offsetof(hfsplus_cat_file, data_fork);
+		hfsplus_bnode_readbytes(fd.bnode, &fork, off, sizeof(fork));
+		hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_DATA);
+#endif
+
+		off = fd.entryoffset + offsetof(hfsplus_cat_file, rsrc_fork);
+		hfsplus_bnode_readbytes(fd.bnode, &fork, off, sizeof(fork));
+		hfsplus_free_fork(sb, cnid, &fork, HFSPLUS_TYPE_RSRC);
+	}
+
+	list_for_each(pos, &HFSPLUS_I(dir).open_dir_list) {
+		struct hfsplus_readdir_data *rd =
+			list_entry(pos, struct hfsplus_readdir_data, list);
+		if (fd.tree->keycmp(fd.search_key, (void *)&rd->key) < 0)
+			rd->file->f_pos--;
+	}
+
+	err = hfsplus_bnode_remove_rec(&fd);
+	if (err)
+		goto out;
+
+	hfsplus_fill_cat_key(fd.search_key, cnid, NULL);
+	err = hfsplus_btree_find(&fd);
+	if (err)
+		goto out;
+
+	err = hfsplus_bnode_remove_rec(&fd);
+	if (err) 
+		goto out;
+
+	dir->i_size--;
+	mark_inode_dirty(dir);
+out:
+	hfsplus_find_exit(&fd);
+
+	return err;
+}
+
+int hfsplus_rename_cat(u32 cnid,
+		       struct inode *src_dir, struct qstr *src_name,
+		       struct inode *dst_dir, struct qstr *dst_name)
+{
+	struct super_block *sb;
+	struct hfsplus_find_data src_fd, dst_fd;
+	hfsplus_cat_entry entry;
+	int entry_size, type;
+	int err = 0;
+
+	dprint(DBG_CAT_MOD, "rename_cat: %u - %lu,%s - %lu,%s\n", cnid, src_dir->i_ino, src_name->name,
+		dst_dir->i_ino, dst_name->name);
+	sb = src_dir->i_sb;
+	hfsplus_find_init(HFSPLUS_SB(sb).cat_tree, &src_fd);
+	dst_fd = src_fd;
+
+	/* find the old dir entry and read the data */
+	hfsplus_fill_cat_key(src_fd.search_key, src_dir->i_ino, src_name);
+	err = hfsplus_btree_find(&src_fd);
+	if (err)
+		goto out;
+		
+	hfsplus_bnode_readbytes(src_fd.bnode, &entry, src_fd.entryoffset,
+				src_fd.entrylength);
+
+	/* create new dir entry with the data from the old entry */
+	hfsplus_fill_cat_key(dst_fd.search_key, dst_dir->i_ino, dst_name);
+	err = hfsplus_btree_find(&dst_fd);
+	if (err != -ENOENT) {
+		if (!err)
+			err = -EEXIST;
+		goto out;
+	}
+
+	err = hfsplus_bnode_insert_rec(&dst_fd, &entry, src_fd.entrylength);
+	if (err)
+		goto out;
+	dst_dir->i_size++;
+	mark_inode_dirty(dst_dir);
+
+	/* finally remove the old entry */
+	hfsplus_fill_cat_key(src_fd.search_key, src_dir->i_ino, src_name);
+	err = hfsplus_btree_find(&src_fd);
+	if (err)
+		goto out;
+	err = hfsplus_bnode_remove_rec(&src_fd);
+	if (err)
+		goto out;
+	src_dir->i_size--;
+	mark_inode_dirty(src_dir);
+
+	/* remove old thread entry */
+	hfsplus_fill_cat_key(src_fd.search_key, cnid, NULL);
+	err = hfsplus_btree_find(&src_fd);
+	if (err)
+		goto out;
+	type = hfsplus_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
+	err = hfsplus_bnode_remove_rec(&src_fd);
+	if (err)
+		goto out;
+
+	/* create new thread entry */
+	hfsplus_fill_cat_key(dst_fd.search_key, cnid, NULL);
+	entry_size = hfsplus_fill_cat_thread(&entry, type, dst_dir->i_ino, dst_name);
+	err = hfsplus_btree_find(&dst_fd);
+	if (err != -ENOENT) {
+		if (!err)
+			err = -EEXIST;
+		goto out;
+	}
+	err = hfsplus_bnode_insert_rec(&dst_fd, &entry, entry_size);
+out:
+	hfsplus_put_bnode(dst_fd.bnode);
+	hfsplus_find_exit(&src_fd);
+	return err;
+}