hfsplus: add support of manipulation by attributes file

Add support of manipulation by attributes file.
Signed-off-by: Vyacheslav Dubeyko <slava@dubeyko.com>
Reported-by: Hin-Tak Leung <htl10@users.sourceforge.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

fs/hfsplus/Makefile

@@ -5,5 +5,5 @@
 obj-$(CONFIG_HFSPLUS_FS) += hfsplus.o
 
 hfsplus-objs := super.o options.o inode.o ioctl.o extents.o catalog.o dir.o btree.o \
-		bnode.o brec.o bfind.o tables.o unicode.o wrapper.o bitmap.o part_tbl.o
-
+		bnode.o brec.o bfind.o tables.o unicode.o wrapper.o bitmap.o part_tbl.o \
+		attributes.o xattr.o xattr_user.o xattr_security.o xattr_trusted.o

fs/hfsplus/bfind.c

@@ -24,7 +24,19 @@ int hfs_find_init(struct hfs_btree *tree, struct hfs_find_data *fd)
 	fd->key = ptr + tree->max_key_len + 2;
 	dprint(DBG_BNODE_REFS, "find_init: %d (%p)\n",
 		tree->cnid, __builtin_return_address(0));
-	mutex_lock(&tree->tree_lock);
+	switch (tree->cnid) {
+	case HFSPLUS_CAT_CNID:
+		mutex_lock_nested(&tree->tree_lock, CATALOG_BTREE_MUTEX);
+		break;
+	case HFSPLUS_EXT_CNID:
+		mutex_lock_nested(&tree->tree_lock, EXTENTS_BTREE_MUTEX);
+		break;
+	case HFSPLUS_ATTR_CNID:
+		mutex_lock_nested(&tree->tree_lock, ATTR_BTREE_MUTEX);
+		break;
+	default:
+		BUG();
+	}
 	return 0;
 }
 
@@ -38,15 +50,73 @@ void hfs_find_exit(struct hfs_find_data *fd)
 	fd->tree = NULL;
 }
 
-/* Find the record in bnode that best matches key (not greater than...)*/
-int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd)
+int hfs_find_1st_rec_by_cnid(struct hfs_bnode *bnode,
+				struct hfs_find_data *fd,
+				int *begin,
+				int *end,
+				int *cur_rec)
+{
+	__be32 cur_cnid, search_cnid;
+
+	if (bnode->tree->cnid == HFSPLUS_EXT_CNID) {
+		cur_cnid = fd->key->ext.cnid;
+		search_cnid = fd->search_key->ext.cnid;
+	} else if (bnode->tree->cnid == HFSPLUS_CAT_CNID) {
+		cur_cnid = fd->key->cat.parent;
+		search_cnid = fd->search_key->cat.parent;
+	} else if (bnode->tree->cnid == HFSPLUS_ATTR_CNID) {
+		cur_cnid = fd->key->attr.cnid;
+		search_cnid = fd->search_key->attr.cnid;
+	} else
+		BUG();
+
+	if (cur_cnid == search_cnid) {
+		(*end) = (*cur_rec);
+		if ((*begin) == (*end))
+			return 1;
+	} else {
+		if (be32_to_cpu(cur_cnid) < be32_to_cpu(search_cnid))
+			(*begin) = (*cur_rec) + 1;
+		else
+			(*end) = (*cur_rec) - 1;
+	}
+
+	return 0;
+}
+
+int hfs_find_rec_by_key(struct hfs_bnode *bnode,
+				struct hfs_find_data *fd,
+				int *begin,
+				int *end,
+				int *cur_rec)
 {
 	int cmpval;
+
+	cmpval = bnode->tree->keycmp(fd->key, fd->search_key);
+	if (!cmpval) {
+		(*end) = (*cur_rec);
+		return 1;
+	}
+	if (cmpval < 0)
+		(*begin) = (*cur_rec) + 1;
+	else
+		*(end) = (*cur_rec) - 1;
+
+	return 0;
+}
+
+/* Find the record in bnode that best matches key (not greater than...)*/
+int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd,
+					search_strategy_t rec_found)
+{
 	u16 off, len, keylen;
 	int rec;
 	int b, e;
 	int res;
 
+	if (!rec_found)
+		BUG();
+
 	b = 0;
 	e = bnode->num_recs - 1;
 	res = -ENOENT;
@@ -59,17 +129,12 @@ int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd)
 			goto fail;
 		}
 		hfs_bnode_read(bnode, fd->key, off, keylen);
-		cmpval = bnode->tree->keycmp(fd->key, fd->search_key);
-		if (!cmpval) {
-			e = rec;
+		if (rec_found(bnode, fd, &b, &e, &rec)) {
 			res = 0;
 			goto done;
 		}
-		if (cmpval < 0)
-			b = rec + 1;
-		else
-			e = rec - 1;
 	} while (b <= e);
+
 	if (rec != e && e >= 0) {
 		len = hfs_brec_lenoff(bnode, e, &off);
 		keylen = hfs_brec_keylen(bnode, e);
@@ -79,19 +144,21 @@ int __hfs_brec_find(struct hfs_bnode *bnode, struct hfs_find_data *fd)
 		}
 		hfs_bnode_read(bnode, fd->key, off, keylen);
 	}
+
 done:
 	fd->record = e;
 	fd->keyoffset = off;
 	fd->keylength = keylen;
 	fd->entryoffset = off + keylen;
 	fd->entrylength = len - keylen;
+
 fail:
 	return res;
 }
 
 /* Traverse a B*Tree from the root to a leaf finding best fit to key */
 /* Return allocated copy of node found, set recnum to best record */
-int hfs_brec_find(struct hfs_find_data *fd)
+int hfs_brec_find(struct hfs_find_data *fd, search_strategy_t do_key_compare)
 {
 	struct hfs_btree *tree;
 	struct hfs_bnode *bnode;
@@ -122,7 +189,7 @@ int hfs_brec_find(struct hfs_find_data *fd)
 			goto invalid;
 		bnode->parent = parent;
 
-		res = __hfs_brec_find(bnode, fd);
+		res = __hfs_brec_find(bnode, fd, do_key_compare);
 		if (!height)
 			break;
 		if (fd->record < 0)
@@ -149,7 +216,7 @@ int hfs_brec_read(struct hfs_find_data *fd, void *rec, int rec_len)
 {
 	int res;
 
-	res = hfs_brec_find(fd);
+	res = hfs_brec_find(fd, hfs_find_rec_by_key);
 	if (res)
 		return res;
 	if (fd->entrylength > rec_len)

fs/hfsplus/bnode.c

@@ -62,7 +62,8 @@ void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off)
 
 	tree = node->tree;
 	if (node->type == HFS_NODE_LEAF ||
-	    tree->attributes & HFS_TREE_VARIDXKEYS)
+	    tree->attributes & HFS_TREE_VARIDXKEYS ||
+	    node->tree->cnid == HFSPLUS_ATTR_CNID)
 		key_len = hfs_bnode_read_u16(node, off) + 2;
 	else
 		key_len = tree->max_key_len + 2;
@@ -314,7 +315,8 @@ void hfs_bnode_dump(struct hfs_bnode *node)
 		if (i && node->type == HFS_NODE_INDEX) {
 			int tmp;
 
-			if (node->tree->attributes & HFS_TREE_VARIDXKEYS)
+			if (node->tree->attributes & HFS_TREE_VARIDXKEYS ||
+					node->tree->cnid == HFSPLUS_ATTR_CNID)
 				tmp = hfs_bnode_read_u16(node, key_off) + 2;
 			else
 				tmp = node->tree->max_key_len + 2;

fs/hfsplus/brec.c

@@ -36,7 +36,8 @@ u16 hfs_brec_keylen(struct hfs_bnode *node, u16 rec)
 		return 0;
 
 	if ((node->type == HFS_NODE_INDEX) &&
-	   !(node->tree->attributes & HFS_TREE_VARIDXKEYS)) {
+	   !(node->tree->attributes & HFS_TREE_VARIDXKEYS) &&
+	   (node->tree->cnid != HFSPLUS_ATTR_CNID)) {
 		retval = node->tree->max_key_len + 2;
 	} else {
 		recoff = hfs_bnode_read_u16(node,
@@ -151,12 +152,13 @@ int hfs_brec_insert(struct hfs_find_data *fd, void *entry, int entry_len)
 
 		/* get index key */
 		hfs_bnode_read_key(new_node, fd->search_key, 14);
-		__hfs_brec_find(fd->bnode, fd);
+		__hfs_brec_find(fd->bnode, fd, hfs_find_rec_by_key);
 
 		hfs_bnode_put(new_node);
 		new_node = NULL;
 
-		if (tree->attributes & HFS_TREE_VARIDXKEYS)
+		if ((tree->attributes & HFS_TREE_VARIDXKEYS) ||
+				(tree->cnid == HFSPLUS_ATTR_CNID))
 			key_len = be16_to_cpu(fd->search_key->key_len) + 2;
 		else {
 			fd->search_key->key_len =
@@ -201,7 +203,7 @@ int hfs_brec_remove(struct hfs_find_data *fd)
 		hfs_bnode_put(node);
 		node = fd->bnode = parent;
 
-		__hfs_brec_find(node, fd);
+		__hfs_brec_find(node, fd, hfs_find_rec_by_key);
 		goto again;
 	}
 	hfs_bnode_write_u16(node,
@@ -367,12 +369,13 @@ static int hfs_brec_update_parent(struct hfs_find_data *fd)
 	parent = hfs_bnode_find(tree, node->parent);
 	if (IS_ERR(parent))
 		return PTR_ERR(parent);
-	__hfs_brec_find(parent, fd);
+	__hfs_brec_find(parent, fd, hfs_find_rec_by_key);
 	hfs_bnode_dump(parent);
 	rec = fd->record;
 
 	/* size difference between old and new key */
-	if (tree->attributes & HFS_TREE_VARIDXKEYS)
+	if ((tree->attributes & HFS_TREE_VARIDXKEYS) ||
+				(tree->cnid == HFSPLUS_ATTR_CNID))
 		newkeylen = hfs_bnode_read_u16(node, 14) + 2;
 	else
 		fd->keylength = newkeylen = tree->max_key_len + 2;
@@ -427,7 +430,7 @@ static int hfs_brec_update_parent(struct hfs_find_data *fd)
 		hfs_bnode_read_key(new_node, fd->search_key, 14);
 		cnid = cpu_to_be32(new_node->this);
 
-		__hfs_brec_find(fd->bnode, fd);
+		__hfs_brec_find(fd->bnode, fd, hfs_find_rec_by_key);
 		hfs_brec_insert(fd, &cnid, sizeof(cnid));
 		hfs_bnode_put(fd->bnode);
 		hfs_bnode_put(new_node);
@@ -495,13 +498,15 @@ static int hfs_btree_inc_height(struct hfs_btree *tree)
 		/* insert old root idx into new root */
 		node->parent = tree->root;
 		if (node->type == HFS_NODE_LEAF ||
-		    tree->attributes & HFS_TREE_VARIDXKEYS)
+				tree->attributes & HFS_TREE_VARIDXKEYS ||
+				tree->cnid == HFSPLUS_ATTR_CNID)
 			key_size = hfs_bnode_read_u16(node, 14) + 2;
 		else
 			key_size = tree->max_key_len + 2;
 		hfs_bnode_copy(new_node, 14, node, 14, key_size);
 
-		if (!(tree->attributes & HFS_TREE_VARIDXKEYS)) {
+		if (!(tree->attributes & HFS_TREE_VARIDXKEYS) &&
+				(tree->cnid != HFSPLUS_ATTR_CNID)) {
 			key_size = tree->max_key_len + 2;
 			hfs_bnode_write_u16(new_node, 14, tree->max_key_len);
 		}

fs/hfsplus/btree.c

@@ -98,6 +98,14 @@ struct hfs_btree *hfs_btree_open(struct super_block *sb, u32 id)
 			set_bit(HFSPLUS_SB_CASEFOLD, &HFSPLUS_SB(sb)->flags);
 		}
 		break;
+	case HFSPLUS_ATTR_CNID:
+		if (tree->max_key_len != HFSPLUS_ATTR_KEYLEN - sizeof(u16)) {
+			printk(KERN_ERR "hfs: invalid attributes max_key_len %d\n",
+				tree->max_key_len);
+			goto fail_page;
+		}
+		tree->keycmp = hfsplus_attr_bin_cmp_key;
+		break;
 	default:
 		printk(KERN_ERR "hfs: unknown B*Tree requested\n");
 		goto fail_page;

fs/hfsplus/catalog.c

@@ -45,7 +45,8 @@ void hfsplus_cat_build_key(struct super_block *sb, hfsplus_btree_key *key,
 
 	key->cat.parent = cpu_to_be32(parent);
 	if (str) {
-		hfsplus_asc2uni(sb, &key->cat.name, str->name, str->len);
+		hfsplus_asc2uni(sb, &key->cat.name, HFSPLUS_MAX_STRLEN,
+					str->name, str->len);
 		len = be16_to_cpu(key->cat.name.length);
 	} else {
 		key->cat.name.length = 0;
@@ -167,7 +168,8 @@ static int hfsplus_fill_cat_thread(struct super_block *sb,
 	entry->type = cpu_to_be16(type);
 	entry->thread.reserved = 0;
 	entry->thread.parentID = cpu_to_be32(parentid);
-	hfsplus_asc2uni(sb, &entry->thread.nodeName, str->name, str->len);
+	hfsplus_asc2uni(sb, &entry->thread.nodeName, HFSPLUS_MAX_STRLEN,
+				str->name, str->len);
 	return 10 + be16_to_cpu(entry->thread.nodeName.length) * 2;
 }
 
@@ -198,7 +200,7 @@ int hfsplus_find_cat(struct super_block *sb, u32 cnid,
 	hfsplus_cat_build_key_uni(fd->search_key,
 		be32_to_cpu(tmp.thread.parentID),
 		&tmp.thread.nodeName);
-	return hfs_brec_find(fd);
+	return hfs_brec_find(fd, hfs_find_rec_by_key);
 }
 
 int hfsplus_create_cat(u32 cnid, struct inode *dir,
@@ -221,7 +223,7 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir,
 		S_ISDIR(inode->i_mode) ?
 			HFSPLUS_FOLDER_THREAD : HFSPLUS_FILE_THREAD,
 		dir->i_ino, str);
-	err = hfs_brec_find(&fd);
+	err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 	if (err != -ENOENT) {
 		if (!err)
 			err = -EEXIST;
@@ -233,7 +235,7 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir,
 
 	hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
 	entry_size = hfsplus_cat_build_record(&entry, cnid, inode);
-	err = hfs_brec_find(&fd);
+	err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 	if (err != -ENOENT) {
 		/* panic? */
 		if (!err)
@@ -253,7 +255,7 @@ int hfsplus_create_cat(u32 cnid, struct inode *dir,
 
 err1:
 	hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
-	if (!hfs_brec_find(&fd))
+	if (!hfs_brec_find(&fd, hfs_find_rec_by_key))
 		hfs_brec_remove(&fd);
 err2:
 	hfs_find_exit(&fd);
@@ -279,7 +281,7 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
 		int len;
 
 		hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
-		err = hfs_brec_find(&fd);
+		err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 		if (err)
 			goto out;
 
@@ -296,7 +298,7 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
 	} else
 		hfsplus_cat_build_key(sb, fd.search_key, dir->i_ino, str);
 
-	err = hfs_brec_find(&fd);
+	err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 
@@ -326,7 +328,7 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
 		goto out;
 
 	hfsplus_cat_build_key(sb, fd.search_key, cnid, NULL);
-	err = hfs_brec_find(&fd);
+	err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 
@@ -337,6 +339,12 @@ int hfsplus_delete_cat(u32 cnid, struct inode *dir, struct qstr *str)
 	dir->i_size--;
 	dir->i_mtime = dir->i_ctime = CURRENT_TIME_SEC;
 	hfsplus_mark_inode_dirty(dir, HFSPLUS_I_CAT_DIRTY);
+
+	if (type == HFSPLUS_FILE || type == HFSPLUS_FOLDER) {
+		if (HFSPLUS_SB(sb)->attr_tree)
+			hfsplus_delete_all_attrs(dir, cnid);
+	}
+
 out:
 	hfs_find_exit(&fd);
 
@@ -363,7 +371,7 @@ int hfsplus_rename_cat(u32 cnid,
 
 	/* find the old dir entry and read the data */
 	hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
-	err = hfs_brec_find(&src_fd);
+	err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 	if (src_fd.entrylength > sizeof(entry) || src_fd.entrylength < 0) {
@@ -376,7 +384,7 @@ int hfsplus_rename_cat(u32 cnid,
 
 	/* create new dir entry with the data from the old entry */
 	hfsplus_cat_build_key(sb, dst_fd.search_key, dst_dir->i_ino, dst_name);
-	err = hfs_brec_find(&dst_fd);
+	err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
 	if (err != -ENOENT) {
 		if (!err)
 			err = -EEXIST;
@@ -391,7 +399,7 @@ int hfsplus_rename_cat(u32 cnid,
 
 	/* finally remove the old entry */
 	hfsplus_cat_build_key(sb, src_fd.search_key, src_dir->i_ino, src_name);
-	err = hfs_brec_find(&src_fd);
+	err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 	err = hfs_brec_remove(&src_fd);
@@ -402,7 +410,7 @@ int hfsplus_rename_cat(u32 cnid,
 
 	/* remove old thread entry */
 	hfsplus_cat_build_key(sb, src_fd.search_key, cnid, NULL);
-	err = hfs_brec_find(&src_fd);
+	err = hfs_brec_find(&src_fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 	type = hfs_bnode_read_u16(src_fd.bnode, src_fd.entryoffset);
@@ -414,7 +422,7 @@ int hfsplus_rename_cat(u32 cnid,
 	hfsplus_cat_build_key(sb, dst_fd.search_key, cnid, NULL);
 	entry_size = hfsplus_fill_cat_thread(sb, &entry, type,
 		dst_dir->i_ino, dst_name);
-	err = hfs_brec_find(&dst_fd);
+	err = hfs_brec_find(&dst_fd, hfs_find_rec_by_key);
 	if (err != -ENOENT) {
 		if (!err)
 			err = -EEXIST;

fs/hfsplus/dir.c

@@ -15,6 +15,7 @@
 
 #include "hfsplus_fs.h"
 #include "hfsplus_raw.h"
+#include "xattr.h"
 
 static inline void hfsplus_instantiate(struct dentry *dentry,
 				       struct inode *inode, u32 cnid)
@@ -138,7 +139,7 @@ static int hfsplus_readdir(struct file *filp, void *dirent, filldir_t filldir)
 	if (err)
 		return err;
 	hfsplus_cat_build_key(sb, fd.search_key, inode->i_ino, NULL);
-	err = hfs_brec_find(&fd);
+	err = hfs_brec_find(&fd, hfs_find_rec_by_key);
 	if (err)
 		goto out;
 
@@ -421,6 +422,15 @@ static int hfsplus_symlink(struct inode *dir, struct dentry *dentry,
 	if (res)
 		goto out_err;
 
+	res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
+	if (res == -EOPNOTSUPP)
+		res = 0; /* Operation is not supported. */
+	else if (res) {
+		/* Try to delete anyway without error analysis. */
+		hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
+		goto out_err;
+	}
+
 	hfsplus_instantiate(dentry, inode, inode->i_ino);
 	mark_inode_dirty(inode);
 	goto out;
@@ -450,15 +460,26 @@ static int hfsplus_mknod(struct inode *dir, struct dentry *dentry,
 		init_special_inode(inode, mode, rdev);
 
 	res = hfsplus_create_cat(inode->i_ino, dir, &dentry->d_name, inode);
-	if (res) {
-		clear_nlink(inode);
-		hfsplus_delete_inode(inode);
-		iput(inode);
-		goto out;
+	if (res)
+		goto failed_mknod;
+
+	res = hfsplus_init_inode_security(inode, dir, &dentry->d_name);
+	if (res == -EOPNOTSUPP)
+		res = 0; /* Operation is not supported. */
+	else if (res) {
+		/* Try to delete anyway without error analysis. */
+		hfsplus_delete_cat(inode->i_ino, dir, &dentry->d_name);
+		goto failed_mknod;
 	}
 
 	hfsplus_instantiate(dentry, inode, inode->i_ino);
 	mark_inode_dirty(inode);
+	goto out;
+
+failed_mknod:
+	clear_nlink(inode);
+	hfsplus_delete_inode(inode);
+	iput(inode);
 out:
 	mutex_unlock(&sbi->vh_mutex);
 	return res;
@@ -508,6 +529,10 @@ const struct inode_operations hfsplus_dir_inode_operations = {
 	.symlink		= hfsplus_symlink,
 	.mknod			= hfsplus_mknod,
 	.rename			= hfsplus_rename,
+	.setxattr		= generic_setxattr,
+	.getxattr		= generic_getxattr,
+	.listxattr		= hfsplus_listxattr,
+	.removexattr		= hfsplus_removexattr,
 };
 
 const struct file_operations hfsplus_dir_operations = {

fs/hfsplus/extents.c

@@ -95,7 +95,7 @@ static void __hfsplus_ext_write_extent(struct inode *inode,
 			      HFSPLUS_IS_RSRC(inode) ?
 				HFSPLUS_TYPE_RSRC : HFSPLUS_TYPE_DATA);
 
-	res = hfs_brec_find(fd);
+	res = hfs_brec_find(fd, hfs_find_rec_by_key);
 	if (hip->extent_state & HFSPLUS_EXT_NEW) {
 		if (res != -ENOENT)
 			return;
@@ -154,7 +154,7 @@ static inline int __hfsplus_ext_read_extent(struct hfs_find_data *fd,
 
 	hfsplus_ext_build_key(fd->search_key, cnid, block, type);
 	fd->key->ext.cnid = 0;
-	res = hfs_brec_find(fd);
+	res = hfs_brec_find(fd, hfs_find_rec_by_key);
 	if (res && res != -ENOENT)
 		return res;
 	if (fd->key->ext.cnid != fd->search_key->ext.cnid ||

fs/hfsplus/hfsplus_fs.h

@@ -23,6 +23,7 @@
 #define DBG_SUPER	0x00000010
 #define DBG_EXTENT	0x00000020
 #define DBG_BITMAP	0x00000040
+#define DBG_ATTR_MOD	0x00000080
 
 #if 0
 #define DBG_MASK	(DBG_EXTENT|DBG_INODE|DBG_BNODE_MOD)
@@ -46,6 +47,13 @@ typedef int (*btree_keycmp)(const hfsplus_btree_key *,
 
 #define NODE_HASH_SIZE	256
 
+/* B-tree mutex nested subclasses */
+enum hfsplus_btree_mutex_classes {
+	CATALOG_BTREE_MUTEX,
+	EXTENTS_BTREE_MUTEX,
+	ATTR_BTREE_MUTEX,
+};
+
 /* An HFS+ BTree held in memory */
 struct hfs_btree {
 	struct super_block *sb;
@@ -223,6 +231,7 @@ struct hfsplus_inode_info {
 #define HFSPLUS_I_CAT_DIRTY	1	/* has changes in the catalog tree */
 #define HFSPLUS_I_EXT_DIRTY	2	/* has changes in the extent tree */
 #define HFSPLUS_I_ALLOC_DIRTY	3	/* has changes in the allocation file */
+#define HFSPLUS_I_ATTR_DIRTY	4	/* has changes in the attributes tree */
 
 #define HFSPLUS_IS_RSRC(inode) \
 	test_bit(HFSPLUS_I_RSRC, &HFSPLUS_I(inode)->flags)
@@ -302,7 +311,7 @@ static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
 #define hfs_brec_remove hfsplus_brec_remove
 #define hfs_find_init hfsplus_find_init
 #define hfs_find_exit hfsplus_find_exit
-#define __hfs_brec_find __hplusfs_brec_find
+#define __hfs_brec_find __hfsplus_brec_find
 #define hfs_brec_find hfsplus_brec_find
 #define hfs_brec_read hfsplus_brec_read
 #define hfs_brec_goto hfsplus_brec_goto
@@ -324,10 +333,33 @@ static inline unsigned short hfsplus_min_io_size(struct super_block *sb)
  */
 #define HFSPLUS_IOC_BLESS _IO('h', 0x80)
 
+typedef int (*search_strategy_t)(struct hfs_bnode *,
+				struct hfs_find_data *,
+				int *, int *, int *);
+
 /*
  * Functions in any *.c used in other files
  */
 
+/* attributes.c */
+int hfsplus_create_attr_tree_cache(void);
+void hfsplus_destroy_attr_tree_cache(void);
+hfsplus_attr_entry *hfsplus_alloc_attr_entry(void);
+void hfsplus_destroy_attr_entry(hfsplus_attr_entry *entry_p);
+int hfsplus_attr_bin_cmp_key(const hfsplus_btree_key *,
+		const hfsplus_btree_key *);
+int hfsplus_attr_build_key(struct super_block *, hfsplus_btree_key *,
+			u32, const char *);
+void hfsplus_attr_build_key_uni(hfsplus_btree_key *key,
+					u32 cnid,
+					struct hfsplus_attr_unistr *name);
+int hfsplus_find_attr(struct super_block *, u32,
+			const char *, struct hfs_find_data *);
+int hfsplus_attr_exists(struct inode *inode, const char *name);
+int hfsplus_create_attr(struct inode *, const char *, const void *, size_t);
+int hfsplus_delete_attr(struct inode *, const char *);
+int hfsplus_delete_all_attrs(struct inode *dir, u32 cnid);
+
 /* bitmap.c */
 int hfsplus_block_allocate(struct super_block *, u32, u32, u32 *);
 int hfsplus_block_free(struct super_block *, u32, u32);
@@ -369,8 +401,15 @@ int hfs_brec_remove(struct hfs_find_data *);
 /* bfind.c */
 int hfs_find_init(struct hfs_btree *, struct hfs_find_data *);
 void hfs_find_exit(struct hfs_find_data *);
-int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *);
-int hfs_brec_find(struct hfs_find_data *);
+int hfs_find_1st_rec_by_cnid(struct hfs_bnode *,
+				struct hfs_find_data *,
+				int *, int *, int *);
+int hfs_find_rec_by_key(struct hfs_bnode *,
+				struct hfs_find_data *,
+				int *, int *, int *);
+int __hfs_brec_find(struct hfs_bnode *, struct hfs_find_data *,
+				search_strategy_t);
+int hfs_brec_find(struct hfs_find_data *, search_strategy_t);
 int hfs_brec_read(struct hfs_find_data *, void *, int);
 int hfs_brec_goto(struct hfs_find_data *, int);
 
@@ -417,11 +456,6 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 
 /* ioctl.c */
 long hfsplus_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
-int hfsplus_setxattr(struct dentry *dentry, const char *name,
-		     const void *value, size_t size, int flags);
-ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
-			 void *value, size_t size);
-ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size);
 
 /* options.c */
 int hfsplus_parse_options(char *, struct hfsplus_sb_info *);
@@ -446,7 +480,7 @@ int hfsplus_strcmp(const struct hfsplus_unistr *,
 int hfsplus_uni2asc(struct super_block *,
 		const struct hfsplus_unistr *, char *, int *);
 int hfsplus_asc2uni(struct super_block *,
-		struct hfsplus_unistr *, const char *, int);
+		struct hfsplus_unistr *, int, const char *, int);
 int hfsplus_hash_dentry(const struct dentry *dentry,
 		const struct inode *inode, struct qstr *str);
 int hfsplus_compare_dentry(const struct dentry *parent,

fs/hfsplus/inode.c

@@ -17,6 +17,7 @@
 
 #include "hfsplus_fs.h"
 #include "hfsplus_raw.h"
+#include "xattr.h"
 
 static int hfsplus_readpage(struct file *file, struct page *page)
 {
@@ -348,6 +349,18 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 			error = error2;
 	}
 
+	if (test_and_clear_bit(HFSPLUS_I_ATTR_DIRTY, &hip->flags)) {
+		if (sbi->attr_tree) {
+			error2 =
+				filemap_write_and_wait(
+					    sbi->attr_tree->inode->i_mapping);
+			if (!error)
+				error = error2;
+		} else {
+			printk(KERN_ERR "hfs: sync non-existent attributes tree\n");
+		}
+	}
+
 	if (test_and_clear_bit(HFSPLUS_I_ALLOC_DIRTY, &hip->flags)) {
 		error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 		if (!error)
@@ -365,9 +378,10 @@ int hfsplus_file_fsync(struct file *file, loff_t start, loff_t end,
 static const struct inode_operations hfsplus_file_inode_operations = {
 	.lookup		= hfsplus_file_lookup,
 	.setattr	= hfsplus_setattr,
-	.setxattr	= hfsplus_setxattr,
-	.getxattr	= hfsplus_getxattr,
+	.setxattr	= generic_setxattr,
+	.getxattr	= generic_getxattr,
 	.listxattr	= hfsplus_listxattr,
+	.removexattr	= hfsplus_removexattr,
 };
 
 static const struct file_operations hfsplus_file_operations = {

fs/hfsplus/ioctl.c

@@ -16,7 +16,6 @@
 #include <linux/fs.h>
 #include <linux/mount.h>
 #include <linux/sched.h>
-#include <linux/xattr.h>
 #include <asm/uaccess.h>
 #include "hfsplus_fs.h"
 
@@ -151,110 +150,3 @@ long hfsplus_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		return -ENOTTY;
 	}
 }
-
-int hfsplus_setxattr(struct dentry *dentry, const char *name,
-		     const void *value, size_t size, int flags)
-{
-	struct inode *inode = dentry->d_inode;
-	struct hfs_find_data fd;
-	hfsplus_cat_entry entry;
-	struct hfsplus_cat_file *file;
-	int res;
-
-	if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
-		return -EOPNOTSUPP;
-
-	res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
-	if (res)
-		return res;
-	res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
-	if (res)
-		goto out;
-	hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
-			sizeof(struct hfsplus_cat_file));
-	file = &entry.file;
-
-	if (!strcmp(name, "hfs.type")) {
-		if (size == 4)
-			memcpy(&file->user_info.fdType, value, 4);
-		else
-			res = -ERANGE;
-	} else if (!strcmp(name, "hfs.creator")) {
-		if (size == 4)
-			memcpy(&file->user_info.fdCreator, value, 4);
-		else
-			res = -ERANGE;
-	} else
-		res = -EOPNOTSUPP;
-	if (!res) {
-		hfs_bnode_write(fd.bnode, &entry, fd.entryoffset,
-				sizeof(struct hfsplus_cat_file));
-		hfsplus_mark_inode_dirty(inode, HFSPLUS_I_CAT_DIRTY);
-	}
-out:
-	hfs_find_exit(&fd);
-	return res;
-}
-
-ssize_t hfsplus_getxattr(struct dentry *dentry, const char *name,
-			 void *value, size_t size)
-{
-	struct inode *inode = dentry->d_inode;
-	struct hfs_find_data fd;
-	hfsplus_cat_entry entry;
-	struct hfsplus_cat_file *file;
-	ssize_t res = 0;
-
-	if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
-		return -EOPNOTSUPP;
-
-	if (size) {
-		res = hfs_find_init(HFSPLUS_SB(inode->i_sb)->cat_tree, &fd);
-		if (res)
-			return res;
-		res = hfsplus_find_cat(inode->i_sb, inode->i_ino, &fd);
-		if (res)
-			goto out;
-		hfs_bnode_read(fd.bnode, &entry, fd.entryoffset,
-				sizeof(struct hfsplus_cat_file));
-	}
-	file = &entry.file;
-
-	if (!strcmp(name, "hfs.type")) {
-		if (size >= 4) {
-			memcpy(value, &file->user_info.fdType, 4);
-			res = 4;
-		} else
-			res = size ? -ERANGE : 4;
-	} else if (!strcmp(name, "hfs.creator")) {
-		if (size >= 4) {
-			memcpy(value, &file->user_info.fdCreator, 4);
-			res = 4;
-		} else
-			res = size ? -ERANGE : 4;
-	} else
-		res = -EOPNOTSUPP;
-out:
-	if (size)
-		hfs_find_exit(&fd);
-	return res;
-}
-
-#define HFSPLUS_ATTRLIST_SIZE (sizeof("hfs.creator")+sizeof("hfs.type"))
-
-ssize_t hfsplus_listxattr(struct dentry *dentry, char *buffer, size_t size)
-{
-	struct inode *inode = dentry->d_inode;
-
-	if (!S_ISREG(inode->i_mode) || HFSPLUS_IS_RSRC(inode))
-		return -EOPNOTSUPP;
-
-	if (!buffer || !size)
-		return HFSPLUS_ATTRLIST_SIZE;
-	if (size < HFSPLUS_ATTRLIST_SIZE)
-		return -ERANGE;
-	strcpy(buffer, "hfs.type");
-	strcpy(buffer + sizeof("hfs.type"), "hfs.creator");
-
-	return HFSPLUS_ATTRLIST_SIZE;
-}

fs/hfsplus/super.c

@@ -20,6 +20,7 @@ static struct inode *hfsplus_alloc_inode(struct super_block *sb);
 static void hfsplus_destroy_inode(struct inode *inode);
 
 #include "hfsplus_fs.h"
+#include "xattr.h"
 
 static int hfsplus_system_read_inode(struct inode *inode)
 {
@@ -118,6 +119,7 @@ static int hfsplus_system_write_inode(struct inode *inode)
 	case HFSPLUS_ATTR_CNID:
 		fork = &vhdr->attr_file;
 		tree = sbi->attr_tree;
+		break;
 	default:
 		return -EIO;
 	}
@@ -191,6 +193,12 @@ static int hfsplus_sync_fs(struct super_block *sb, int wait)
 	error2 = filemap_write_and_wait(sbi->ext_tree->inode->i_mapping);
 	if (!error)
 		error = error2;
+	if (sbi->attr_tree) {
+		error2 =
+		    filemap_write_and_wait(sbi->attr_tree->inode->i_mapping);
+		if (!error)
+			error = error2;
+	}
 	error2 = filemap_write_and_wait(sbi->alloc_file->i_mapping);
 	if (!error)
 		error = error2;
@@ -281,6 +289,7 @@ static void hfsplus_put_super(struct super_block *sb)
 		hfsplus_sync_fs(sb, 1);
 	}
 
+	hfs_btree_close(sbi->attr_tree);
 	hfs_btree_close(sbi->cat_tree);
 	hfs_btree_close(sbi->ext_tree);
 	iput(sbi->alloc_file);
@@ -477,12 +486,20 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 		printk(KERN_ERR "hfs: failed to load catalog file\n");
 		goto out_close_ext_tree;
 	}
+	if (vhdr->attr_file.total_blocks != 0) {
+		sbi->attr_tree = hfs_btree_open(sb, HFSPLUS_ATTR_CNID);
+		if (!sbi->attr_tree) {
+			printk(KERN_ERR "hfs: failed to load attributes file\n");
+			goto out_close_cat_tree;
+		}
+	}
+	sb->s_xattr = hfsplus_xattr_handlers;
 
 	inode = hfsplus_iget(sb, HFSPLUS_ALLOC_CNID);
 	if (IS_ERR(inode)) {
 		printk(KERN_ERR "hfs: failed to load allocation file\n");
 		err = PTR_ERR(inode);
-		goto out_close_cat_tree;
+		goto out_close_attr_tree;
 	}
 	sbi->alloc_file = inode;
 
@@ -542,10 +559,27 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 			}
 			err = hfsplus_create_cat(sbi->hidden_dir->i_ino, root,
 						 &str, sbi->hidden_dir);
+			if (err) {
 				mutex_unlock(&sbi->vh_mutex);
-			if (err)
 				goto out_put_hidden_dir;
+			}
 
+			err = hfsplus_init_inode_security(sbi->hidden_dir,
+								root, &str);
+			if (err == -EOPNOTSUPP)
+				err = 0; /* Operation is not supported. */
+			else if (err) {
+				/*
+				 * Try to delete anyway without
+				 * error analysis.
+				 */
+				hfsplus_delete_cat(sbi->hidden_dir->i_ino,
+							root, &str);
+				mutex_unlock(&sbi->vh_mutex);
+				goto out_put_hidden_dir;
+			}
+
+			mutex_unlock(&sbi->vh_mutex);
 			hfsplus_mark_inode_dirty(sbi->hidden_dir,
 						 HFSPLUS_I_CAT_DIRTY);
 		}
@@ -562,6 +596,8 @@ static int hfsplus_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_root = NULL;
 out_put_alloc_file:
 	iput(sbi->alloc_file);
+out_close_attr_tree:
+	hfs_btree_close(sbi->attr_tree);
 out_close_cat_tree:
 	hfs_btree_close(sbi->cat_tree);
 out_close_ext_tree:
@@ -635,9 +671,20 @@ static int __init init_hfsplus_fs(void)
 		hfsplus_init_once);
 	if (!hfsplus_inode_cachep)
 		return -ENOMEM;
+	err = hfsplus_create_attr_tree_cache();
+	if (err)
+		goto destroy_inode_cache;
 	err = register_filesystem(&hfsplus_fs_type);
 	if (err)
+		goto destroy_attr_tree_cache;
+	return 0;
+
+destroy_attr_tree_cache:
+	hfsplus_destroy_attr_tree_cache();
+
+destroy_inode_cache:
 	kmem_cache_destroy(hfsplus_inode_cachep);
+
 	return err;
 }
 
@@ -650,6 +697,7 @@ static void __exit exit_hfsplus_fs(void)
 	 * destroy cache.
 	 */
 	rcu_barrier();
+	hfsplus_destroy_attr_tree_cache();
 	kmem_cache_destroy(hfsplus_inode_cachep);
 }
 

fs/hfsplus/unicode.c

@@ -295,7 +295,8 @@ static inline u16 *decompose_unichar(wchar_t uc, int *size)
 	return hfsplus_decompose_table + (off / 4);
 }
 
-int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
+int hfsplus_asc2uni(struct super_block *sb,
+		    struct hfsplus_unistr *ustr, int max_unistr_len,
 		    const char *astr, int len)
 {
 	int size, dsize, decompose;
@@ -303,7 +304,7 @@ int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
 	wchar_t c;
 
 	decompose = !test_bit(HFSPLUS_SB_NODECOMPOSE, &HFSPLUS_SB(sb)->flags);
-	while (outlen < HFSPLUS_MAX_STRLEN && len > 0) {
+	while (outlen < max_unistr_len && len > 0) {
 		size = asc2unichar(sb, astr, len, &c);
 
 		if (decompose)
@@ -311,7 +312,7 @@ int hfsplus_asc2uni(struct super_block *sb, struct hfsplus_unistr *ustr,
 		else
 			dstr = NULL;
 		if (dstr) {
-			if (outlen + dsize > HFSPLUS_MAX_STRLEN)
+			if (outlen + dsize > max_unistr_len)
 				break;
 			do {
 				ustr->unicode[outlen++] = cpu_to_be16(*dstr++);