Reconstruct source directory tree.

1 files changed, 372 insertions, 0 deletions

diff --git a/src/ext4_inode.c b/src/ext4_inode.c
new file mode 100644
index 0000000..9b6eb87
--- /dev/null
+++ b/src/ext4_inode.c
@@ -0,0 +1,372 @@
+/*
+ * Copyright (c) 2013 Grzegorz Kostka (kostka.grzegorz@gmail.com)
+ *
+ *
+ * HelenOS:
+ * Copyright (c) 2012 Martin Sucha
+ * Copyright (c) 2012 Frantisek Princ
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * - Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ * - Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ * - The name of the author may not be used to endorse or promote products
+ *   derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+/** @addtogroup lwext4
+ * @{
+ */
+/**
+ * @file  ext4_inode.c
+ * @brief Inode handle functions
+ */
+
+#include "ext4_config.h"
+#include "ext4_types.h"
+#include "ext4_inode.h"
+#include "ext4_super.h"
+
+/**@brief  Compute number of bits for block count.
+ * @param block_size Filesystem block_size
+ * @return Number of bits
+ */
+static uint32_t ext4_inode_block_bits_count(uint32_t block_size)
+{
+	uint32_t bits = 8;
+	uint32_t size = block_size;
+
+	do {
+		bits++;
+		size = size >> 1;
+	} while (size > 256);
+
+	return bits;
+}
+
+uint32_t ext4_inode_get_mode(struct ext4_sblock *sb, struct ext4_inode *inode)
+{
+	uint32_t v = to_le16(inode->mode);
+
+	if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD) {
+		v |= ((uint32_t)to_le16(inode->osd2.hurd2.mode_high)) << 16;
+	}
+
+	return v;
+}
+
+void ext4_inode_set_mode(struct ext4_sblock *sb, struct ext4_inode *inode,
+			 uint32_t mode)
+{
+	inode->mode = to_le16((mode << 16) >> 16);
+
+	if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_HURD)
+		inode->osd2.hurd2.mode_high = to_le16(mode >> 16);
+}
+
+uint32_t ext4_inode_get_uid(struct ext4_inode *inode)
+{
+	return to_le32(inode->uid);
+}
+
+void ext4_inode_set_uid(struct ext4_inode *inode, uint32_t uid)
+{
+	inode->uid = to_le32(uid);
+}
+
+uint64_t ext4_inode_get_size(struct ext4_sblock *sb, struct ext4_inode *inode)
+{
+	uint64_t v = to_le32(inode->size_lo);
+
+	if ((ext4_get32(sb, rev_level) > 0) &&
+	    (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)))
+		v |= ((uint64_t)to_le32(inode->size_hi)) << 32;
+
+	return v;
+}
+
+void ext4_inode_set_size(struct ext4_inode *inode, uint64_t size)
+{
+	inode->size_lo = to_le32((size << 32) >> 32);
+	inode->size_hi = to_le32(size >> 32);
+}
+
+uint32_t ext4_inode_get_csum(struct ext4_sblock *sb, struct ext4_inode *inode)
+{
+	uint16_t inode_size = ext4_get16(sb, inode_size);
+	uint32_t v = to_le16(inode->osd2.linux2.checksum_lo);
+
+	if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
+		v |= ((uint32_t)to_le16(inode->checksum_hi)) << 16;
+
+	return v;
+}
+
+void ext4_inode_set_csum(struct ext4_sblock *sb, struct ext4_inode *inode,
+			uint32_t checksum)
+{
+	uint16_t inode_size = ext4_get16(sb, inode_size);
+	inode->osd2.linux2.checksum_lo =
+		to_le16((checksum << 16) >> 16);
+
+	if (inode_size > EXT4_GOOD_OLD_INODE_SIZE)
+		inode->checksum_hi = to_le16(checksum >> 16);
+
+}
+
+uint32_t ext4_inode_get_access_time(struct ext4_inode *inode)
+{
+	return to_le32(inode->access_time);
+}
+void ext4_inode_set_access_time(struct ext4_inode *inode, uint32_t time)
+{
+	inode->access_time = to_le32(time);
+}
+
+uint32_t ext4_inode_get_change_inode_time(struct ext4_inode *inode)
+{
+	return to_le32(inode->change_inode_time);
+}
+void ext4_inode_set_change_inode_time(struct ext4_inode *inode, uint32_t time)
+{
+	inode->change_inode_time = to_le32(time);
+}
+
+uint32_t ext4_inode_get_modif_time(struct ext4_inode *inode)
+{
+	return to_le32(inode->modification_time);
+}
+
+void ext4_inode_set_modif_time(struct ext4_inode *inode, uint32_t time)
+{
+	inode->modification_time = to_le32(time);
+}
+
+uint32_t ext4_inode_get_del_time(struct ext4_inode *inode)
+{
+	return to_le32(inode->deletion_time);
+}
+
+void ext4_inode_set_del_time(struct ext4_inode *inode, uint32_t time)
+{
+	inode->deletion_time = to_le32(time);
+}
+
+uint32_t ext4_inode_get_gid(struct ext4_inode *inode)
+{
+	return to_le32(inode->gid);
+}
+void ext4_inode_set_gid(struct ext4_inode *inode, uint32_t gid)
+{
+	inode->gid = to_le32(gid);
+}
+
+uint16_t ext4_inode_get_links_cnt(struct ext4_inode *inode)
+{
+	return to_le16(inode->links_count);
+}
+void ext4_inode_set_links_cnt(struct ext4_inode *inode, uint16_t cnt)
+{
+	inode->links_count = to_le16(cnt);
+}
+
+uint64_t ext4_inode_get_blocks_count(struct ext4_sblock *sb,
+				     struct ext4_inode *inode)
+{
+	uint64_t cnt = to_le32(inode->blocks_count_lo);
+
+	if (ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_HUGE_FILE)) {
+
+		/* 48-bit field */
+		cnt |= (uint64_t)to_le16(inode->osd2.linux2.blocks_high) << 32;
+
+		if (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_HUGE_FILE)) {
+
+			uint32_t block_count = ext4_sb_get_block_size(sb);
+			uint32_t b = ext4_inode_block_bits_count(block_count);
+			return cnt << (b - 9);
+		}
+	}
+
+	return cnt;
+}
+
+int ext4_inode_set_blocks_count(struct ext4_sblock *sb,
+				struct ext4_inode *inode, uint64_t count)
+{
+	/* 32-bit maximum */
+	uint64_t max = 0;
+	max = ~max >> 32;
+
+	if (count <= max) {
+		inode->blocks_count_lo = to_le32((uint32_t)count);
+		inode->osd2.linux2.blocks_high = 0;
+		ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
+
+		return EOK;
+	}
+
+	/* Check if there can be used huge files (many blocks) */
+	if (!ext4_sb_feature_ro_com(sb, EXT4_FRO_COM_HUGE_FILE))
+		return EINVAL;
+
+	/* 48-bit maximum */
+	max = 0;
+	max = ~max >> 16;
+
+	if (count <= max) {
+		inode->blocks_count_lo = to_le32((uint32_t)count);
+		inode->osd2.linux2.blocks_high = to_le16((uint16_t)(count >> 32));
+		ext4_inode_clear_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
+	} else {
+		uint32_t block_count = ext4_sb_get_block_size(sb);
+		uint32_t block_bits =ext4_inode_block_bits_count(block_count);
+
+		ext4_inode_set_flag(inode, EXT4_INODE_FLAG_HUGE_FILE);
+		count = count >> (block_bits - 9);
+		inode->blocks_count_lo = to_le32((uint32_t)count);
+		inode->osd2.linux2.blocks_high = to_le16((uint16_t)(count >> 32));
+	}
+
+	return EOK;
+}
+
+uint32_t ext4_inode_get_flags(struct ext4_inode *inode)
+{
+	return to_le32(inode->flags);
+}
+void ext4_inode_set_flags(struct ext4_inode *inode, uint32_t flags)
+{
+	inode->flags = to_le32(flags);
+}
+
+uint32_t ext4_inode_get_generation(struct ext4_inode *inode)
+{
+	return to_le32(inode->generation);
+}
+void ext4_inode_set_generation(struct ext4_inode *inode, uint32_t gen)
+{
+	inode->generation = to_le32(gen);
+}
+
+uint16_t ext4_inode_get_extra_isize(struct ext4_inode *inode)
+{
+	return to_le16(inode->extra_isize);
+}
+
+void ext4_inode_set_extra_isize(struct ext4_inode *inode, uint16_t size)
+{
+	inode->extra_isize = to_le16(size);
+}
+
+uint64_t ext4_inode_get_file_acl(struct ext4_inode *inode,
+				 struct ext4_sblock *sb)
+{
+	uint64_t v = to_le32(inode->file_acl_lo);
+
+	if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
+		v |= (uint32_t)to_le16(inode->osd2.linux2.file_acl_high) << 16;
+
+	return v;
+}
+
+void ext4_inode_set_file_acl(struct ext4_inode *inode, struct ext4_sblock *sb,
+			     uint64_t acl)
+{
+	inode->file_acl_lo = to_le32((acl << 32) >> 32);
+
+	if (ext4_get32(sb, creator_os) == EXT4_SUPERBLOCK_OS_LINUX)
+		inode->osd2.linux2.file_acl_high = to_le16((uint16_t)(acl >> 32));
+}
+
+uint32_t ext4_inode_get_direct_block(struct ext4_inode *inode, uint32_t idx)
+{
+	return to_le32(inode->blocks[idx]);
+}
+void ext4_inode_set_direct_block(struct ext4_inode *inode, uint32_t idx,
+				 uint32_t block)
+{
+	inode->blocks[idx] = to_le32(block);
+}
+
+uint32_t ext4_inode_get_indirect_block(struct ext4_inode *inode, uint32_t idx)
+{
+	return to_le32(inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK]);
+}
+
+void ext4_inode_set_indirect_block(struct ext4_inode *inode, uint32_t idx,
+				   uint32_t block)
+{
+	inode->blocks[idx + EXT4_INODE_INDIRECT_BLOCK] = to_le32(block);
+}
+
+uint32_t ext4_inode_type(struct ext4_sblock *sb, struct ext4_inode *inode)
+{
+	return (ext4_inode_get_mode(sb, inode) & EXT4_INODE_MODE_TYPE_MASK);
+}
+
+bool ext4_inode_is_type(struct ext4_sblock *sb, struct ext4_inode *inode,
+			uint32_t type)
+{
+	return ext4_inode_type(sb, inode) == type;
+}
+
+bool ext4_inode_has_flag(struct ext4_inode *inode, uint32_t f)
+{
+	return ext4_inode_get_flags(inode) & f;
+}
+
+void ext4_inode_clear_flag(struct ext4_inode *inode, uint32_t f)
+{
+	uint32_t flags = ext4_inode_get_flags(inode);
+	flags = flags & (~f);
+	ext4_inode_set_flags(inode, flags);
+}
+
+void ext4_inode_set_flag(struct ext4_inode *inode, uint32_t f)
+{
+	uint32_t flags = ext4_inode_get_flags(inode);
+	flags = flags | f;
+	ext4_inode_set_flags(inode, flags);
+}
+
+bool ext4_inode_can_truncate(struct ext4_sblock *sb, struct ext4_inode *inode)
+{
+	if ((ext4_inode_has_flag(inode, EXT4_INODE_FLAG_APPEND)) ||
+	    (ext4_inode_has_flag(inode, EXT4_INODE_FLAG_IMMUTABLE)))
+		return false;
+
+	if ((ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_FILE)) ||
+	    (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_DIRECTORY)) ||
+	    (ext4_inode_is_type(sb, inode, EXT4_INODE_MODE_SOFTLINK)))
+		return true;
+
+	return false;
+}
+
+struct ext4_extent_header *
+ext4_inode_get_extent_header(struct ext4_inode *inode)
+{
+	return (struct ext4_extent_header *)inode->blocks;
+}
+
+/**
+ * @}
+ */