1 files changed, 0 insertions, 347 deletions
diff --git a/lib/sqfs/xattr/xattr_writer_flush.c b/lib/sqfs/xattr/xattr_writer_flush.c
deleted file mode 100644
index a06463f..0000000
--- a/lib/sqfs/xattr/xattr_writer_flush.c
+++ /dev/null
@@ -1,347 +0,0 @@
-/* SPDX-License-Identifier: LGPL-3.0-or-later */
-/*
- * xattr_writer_flush.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "xattr_writer.h"
-
-static const char *hexmap = "0123456789ABCDEF";
-
-static void *from_base32(const char *input, size_t *size_out)
-{
-	sqfs_u8 lo, hi, *out, *ptr;
-	size_t len;
-
-	len = strlen(input);
-	*size_out = len / 2;
-
-	out = malloc(*size_out);
-	if (out == NULL)
-		return NULL;
-
-	ptr = out;
-
-	while (*input != '\0') {
-		lo = strchr(hexmap, *(input++)) - hexmap;
-		hi = strchr(hexmap, *(input++)) - hexmap;
-
-		*(ptr++) = lo | (hi << 4);
-	}
-
-	return out;
-}
-
-static sqfs_s32 write_key(sqfs_meta_writer_t *mw, const char *key,
-			  bool value_is_ool)
-{
-	sqfs_xattr_entry_t kent;
-	int type, err;
-	size_t len;
-
-	type = sqfs_get_xattr_prefix_id(key);
-	assert(type >= 0);
-
-	key = strchr(key, '.');
-	assert(key != NULL);
-	++key;
-	len = strlen(key);
-
-	if (value_is_ool)
-		type |= SQFS_XATTR_FLAG_OOL;
-
-	memset(&kent, 0, sizeof(kent));
-	kent.type = htole16(type);
-	kent.size = htole16(len);
-
-	err = sqfs_meta_writer_append(mw, &kent, sizeof(kent));
-	if (err)
-		return err;
-
-	err = sqfs_meta_writer_append(mw, key, len);
-	if (err)
-		return err;
-
-	return sizeof(kent) + len;
-}
-
-static sqfs_s32 write_value(sqfs_meta_writer_t *mw, const char *value_str,
-			    sqfs_u64 *value_ref_out)
-{
-	sqfs_xattr_value_t vent;
-	sqfs_u32 offset;
-	sqfs_u64 block;
-	size_t size;
-	void *value;
-	int err;
-
-	value = from_base32(value_str, &size);
-	if (value == NULL)
-		return SQFS_ERROR_ALLOC;
-
-	memset(&vent, 0, sizeof(vent));
-	vent.size = htole32(size);
-
-	sqfs_meta_writer_get_position(mw, &block, &offset);
-	*value_ref_out = (block << 16) | (offset & 0xFFFF);
-
-	err = sqfs_meta_writer_append(mw, &vent, sizeof(vent));
-	if (err)
-		goto fail;
-
-	err = sqfs_meta_writer_append(mw, value, size);
-	if (err)
-		goto fail;
-
-	free(value);
-	return sizeof(vent) + size;
-fail:
-	free(value);
-	return err;
-}
-
-static sqfs_s32 write_value_ool(sqfs_meta_writer_t *mw, sqfs_u64 location)
-{
-	sqfs_xattr_value_t vent;
-	sqfs_u64 ref;
-	int err;
-
-	memset(&vent, 0, sizeof(vent));
-	vent.size = htole32(sizeof(location));
-	ref = htole64(location);
-
-	err = sqfs_meta_writer_append(mw, &vent, sizeof(vent));
-	if (err)
-		return err;
-
-	err = sqfs_meta_writer_append(mw, &ref, sizeof(ref));
-	if (err)
-		return err;
-
-	return sizeof(vent) + sizeof(ref);
-}
-
-static bool should_store_ool(const char *val_str, size_t refcount)
-{
-	if (refcount < 2)
-		return false;
-
-	/*
-	  Storing in line needs this many bytes: refcount * len
-
-	  Storing out-of-line needs this many: len + (refcount - 1) * 8
-
-	  Out-of-line prefereable iff refcount > 1 and:
-	      refcount * len > len + (refcount - 1) * 8
-	   => refcount * len - len > (refcount - 1) * 8
-	   => (refcount - 1) * len > (refcount - 1) * 8
-	   => len > 8
-	 */
-	return (strlen(val_str) / 2) > sizeof(sqfs_u64);
-}
-
-static int write_block_pairs(const sqfs_xattr_writer_t *xwr,
-			     sqfs_meta_writer_t *mw,
-			     const kv_block_desc_t *blk,
-			     sqfs_u64 *ool_locations)
-{
-	const char *key_str, *value_str;
-	sqfs_s32 diff, total = 0;
-	size_t i, refcount;
-	sqfs_u64 ref;
-
-	for (i = 0; i < blk->count; ++i) {
-		sqfs_u64 ent = ((sqfs_u64 *)xwr->kv_pairs.data)[blk->start + i];
-		sqfs_u32 key_idx = GET_KEY(ent);
-		sqfs_u32 val_idx = GET_VALUE(ent);
-
-		key_str = str_table_get_string(&xwr->keys, key_idx);
-		value_str = str_table_get_string(&xwr->values, val_idx);
-
-		if (ool_locations[val_idx] == 0xFFFFFFFFFFFFFFFFUL) {
-			diff = write_key(mw, key_str, false);
-			if (diff < 0)
-				return diff;
-			total += diff;
-
-			diff = write_value(mw, value_str, &ref);
-			if (diff < 0)
-				return diff;
-			total += diff;
-
-			refcount = str_table_get_ref_count(&xwr->values,
-							   val_idx);
-
-			if (should_store_ool(value_str, refcount))
-				ool_locations[val_idx] = ref;
-		} else {
-			diff = write_key(mw, key_str, true);
-			if (diff < 0)
-				return diff;
-			total += diff;
-
-			diff = write_value_ool(mw, ool_locations[val_idx]);
-			if (diff < 0)
-				return diff;
-			total += diff;
-		}
-	}
-
-	return total;
-}
-
-static int write_kv_pairs(const sqfs_xattr_writer_t *xwr,
-			  sqfs_meta_writer_t *mw)
-{
-	sqfs_u64 block, *ool_locations;
-	kv_block_desc_t *blk;
-	sqfs_u32 offset;
-	sqfs_s32 size;
-	size_t i;
-
-	ool_locations = alloc_array(sizeof(ool_locations[0]),
-				    str_table_count(&xwr->values));
-	if (ool_locations == NULL)
-		return SQFS_ERROR_ALLOC;
-
-	for (i = 0; i < str_table_count(&xwr->values); ++i)
-		ool_locations[i] = 0xFFFFFFFFFFFFFFFFUL;
-
-	for (blk = xwr->kv_block_first; blk != NULL; blk = blk->next) {
-		sqfs_meta_writer_get_position(mw, &block, &offset);
-		blk->start_ref = (block << 16) | (offset & 0xFFFF);
-
-		size = write_block_pairs(xwr, mw, blk, ool_locations);
-		if (size < 0) {
-			free(ool_locations);
-			return size;
-		}
-
-		blk->size_bytes = size;
-	}
-
-	free(ool_locations);
-	return sqfs_meta_writer_flush(mw);
-}
-
-static int write_id_table(const sqfs_xattr_writer_t *xwr,
-			  sqfs_meta_writer_t *mw,
-			  sqfs_u64 *locations)
-{
-	sqfs_xattr_id_t id_ent;
-	kv_block_desc_t *blk;
-	sqfs_u32 offset;
-	sqfs_u64 block;
-	size_t i = 0;
-	int err;
-
-	locations[i++] = 0;
-
-	for (blk = xwr->kv_block_first; blk != NULL; blk = blk->next) {
-		memset(&id_ent, 0, sizeof(id_ent));
-		id_ent.xattr = htole64(blk->start_ref);
-		id_ent.count = htole32(blk->count);
-		id_ent.size = htole32(blk->size_bytes);
-
-		err = sqfs_meta_writer_append(mw, &id_ent, sizeof(id_ent));
-		if (err)
-			return err;
-
-		sqfs_meta_writer_get_position(mw, &block, &offset);
-		if (block != locations[i - 1])
-			locations[i++] = block;
-	}
-
-	return sqfs_meta_writer_flush(mw);
-}
-
-static int write_location_table(const sqfs_xattr_writer_t *xwr,
-				sqfs_u64 kv_start, sqfs_file_t *file,
-				const sqfs_super_t *super, sqfs_u64 *locations,
-				size_t loc_count)
-{
-	sqfs_xattr_id_table_t idtbl;
-	int err;
-
-	memset(&idtbl, 0, sizeof(idtbl));
-	idtbl.xattr_table_start = htole64(kv_start);
-	idtbl.xattr_ids = htole32(xwr->num_blocks);
-
-	err = file->write_at(file, super->xattr_id_table_start,
-			     &idtbl, sizeof(idtbl));
-	if (err)
-		return err;
-
-	return file->write_at(file, super->xattr_id_table_start + sizeof(idtbl),
-			      locations, sizeof(locations[0]) * loc_count);
-}
-
-static int alloc_location_table(const sqfs_xattr_writer_t *xwr,
-				sqfs_u64 **tbl_out, size_t *szout)
-{
-	sqfs_u64 *locations;
-	size_t size, count;
-
-	if (SZ_MUL_OV(xwr->num_blocks, sizeof(sqfs_xattr_id_t), &size))
-		return SQFS_ERROR_OVERFLOW;
-
-	count = size / SQFS_META_BLOCK_SIZE;
-	if (size % SQFS_META_BLOCK_SIZE)
-		++count;
-
-	locations = alloc_array(sizeof(sqfs_u64), count);
-	if (locations == NULL)
-		return SQFS_ERROR_ALLOC;
-
-	*tbl_out = locations;
-	*szout = count;
-	return 0;
-}
-
-int sqfs_xattr_writer_flush(const sqfs_xattr_writer_t *xwr, sqfs_file_t *file,
-			    sqfs_super_t *super, sqfs_compressor_t *cmp)
-{
-	sqfs_u64 *locations = NULL, kv_start, id_start;
-	sqfs_meta_writer_t *mw;
-	size_t i, count;
-	int err;
-
-	if (xwr->kv_pairs.used == 0 || xwr->num_blocks == 0) {
-		super->xattr_id_table_start = 0xFFFFFFFFFFFFFFFFUL;
-		super->flags |= SQFS_FLAG_NO_XATTRS;
-		return 0;
-	}
-
-	mw = sqfs_meta_writer_create(file, cmp, 0);
-	if (mw == NULL)
-		return SQFS_ERROR_ALLOC;
-
-	kv_start = file->get_size(file);
-	err = write_kv_pairs(xwr, mw);
-	if (err)
-		goto out;
-
-	sqfs_meta_writer_reset(mw);
-
-	id_start = file->get_size(file);
-	err = alloc_location_table(xwr, &locations, &count);
-	if (err)
-		goto out;
-
-	err = write_id_table(xwr, mw, locations);
-	if (err)
-		goto out;
-
-	super->xattr_id_table_start = file->get_size(file);
-	super->flags &= ~SQFS_FLAG_NO_XATTRS;
-
-	for (i = 0; i < count; ++i)
-		locations[i] = htole64(locations[i] + id_start);
-
-	err = write_location_table(xwr, kv_start, file, super,
-				   locations, count);
-out:
-	free(locations);
-	sqfs_drop(mw);
-	return err;
-}