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Commit 82de647e authored by Phillip Lougher's avatar Phillip Lougher
Browse files

Squashfs: move table allocation into squashfs_read_table() 



This eliminates a lot of duplicate code.

Signed-off-by: default avatarPhillip Lougher <phillip@lougher.demon.co.uk>
parent 117a91e0

fs/squashfs/cache.c

+23 −6
Original line number Diff line number Diff line
@@ -393,19 +393,36 @@ struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *sb, 
/*

 * Read a filesystem table (uncompressed sequence of bytes) from disk

 */

int squashfs_read_table(struct super_block *sb, void *buffer, u64 block,

	int length)

void *squashfs_read_table(struct super_block *sb, u64 block, int length)

{

	int pages = (length + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;

	int i, res;

	void **data = kcalloc(pages, sizeof(void *), GFP_KERNEL);

	if (data == NULL)

		return -ENOMEM;

	void *table, *buffer, **data;



	table = buffer = kmalloc(length, GFP_KERNEL);

	if (table == NULL)

		return ERR_PTR(-ENOMEM);



	data = kcalloc(pages, sizeof(void *), GFP_KERNEL);

	if (data == NULL) {

		res = -ENOMEM;

		goto failed;

	}



	for (i = 0; i < pages; i++, buffer += PAGE_CACHE_SIZE)

		data[i] = buffer;



	res = squashfs_read_data(sb, data, block, length |

		SQUASHFS_COMPRESSED_BIT_BLOCK, NULL, length, pages);



	kfree(data);

	return res;



	if (res < 0)

		goto failed;



	return table;



failed:

	kfree(table);

	return ERR_PTR(res);

}

fs/squashfs/export.c

+1 −18
Original line number Diff line number Diff line
@@ -124,27 +124,10 @@ __le64 *squashfs_read_inode_lookup_table(struct super_block *sb, 
		u64 lookup_table_start, unsigned int inodes)

{

	unsigned int length = SQUASHFS_LOOKUP_BLOCK_BYTES(inodes);

	__le64 *inode_lookup_table;

	int err;



	TRACE("In read_inode_lookup_table, length %d\n", length);



	/* Allocate inode lookup table indexes */

	inode_lookup_table = kmalloc(length, GFP_KERNEL);

	if (inode_lookup_table == NULL) {

		ERROR("Failed to allocate inode lookup table\n");

		return ERR_PTR(-ENOMEM);

	}



	err = squashfs_read_table(sb, inode_lookup_table, lookup_table_start,

			length);

	if (err < 0) {

		ERROR("unable to read inode lookup table\n");

		kfree(inode_lookup_table);

		return ERR_PTR(err);

	}



	return inode_lookup_table;

	return squashfs_read_table(sb, lookup_table_start, length);

}

fs/squashfs/fragment.c

+1 −18
Original line number Diff line number Diff line
@@ -74,23 +74,6 @@ __le64 *squashfs_read_fragment_index_table(struct super_block *sb, 
	u64 fragment_table_start, unsigned int fragments)

{

	unsigned int length = SQUASHFS_FRAGMENT_INDEX_BYTES(fragments);

	__le64 *fragment_index;

	int err;



	/* Allocate fragment lookup table indexes */

	fragment_index = kmalloc(length, GFP_KERNEL);

	if (fragment_index == NULL) {

		ERROR("Failed to allocate fragment index table\n");

		return ERR_PTR(-ENOMEM);

	}



	err = squashfs_read_table(sb, fragment_index, fragment_table_start,

			length);

	if (err < 0) {

		ERROR("unable to read fragment index table\n");

		kfree(fragment_index);

		return ERR_PTR(err);

	}



	return fragment_index;

	return squashfs_read_table(sb, fragment_table_start, length);

}

fs/squashfs/id.c

+1 −17
Original line number Diff line number Diff line
@@ -69,24 +69,8 @@ __le64 *squashfs_read_id_index_table(struct super_block *sb, 
			u64 id_table_start, unsigned short no_ids)

{

	unsigned int length = SQUASHFS_ID_BLOCK_BYTES(no_ids);

	__le64 *id_table;

	int err;



	TRACE("In read_id_index_table, length %d\n", length);



	/* Allocate id lookup table indexes */

	id_table = kmalloc(length, GFP_KERNEL);

	if (id_table == NULL) {

		ERROR("Failed to allocate id index table\n");

		return ERR_PTR(-ENOMEM);

	}



	err = squashfs_read_table(sb, id_table, id_table_start, length);

	if (err < 0) {

		ERROR("unable to read id index table\n");

		kfree(id_table);

		return ERR_PTR(err);

	}



	return id_table;

	return squashfs_read_table(sb, id_table_start, length);

}

fs/squashfs/squashfs.h

+1 −1
Original line number Diff line number Diff line
@@ -44,7 +44,7 @@ extern struct squashfs_cache_entry *squashfs_get_fragment(struct super_block *, 
				u64, int);

extern struct squashfs_cache_entry *squashfs_get_datablock(struct super_block *,

				u64, int);

extern int squashfs_read_table(struct super_block *, void *, u64, int);

extern void *squashfs_read_table(struct super_block *, u64, int);



/* decompressor.c */

extern const struct squashfs_decompressor *squashfs_lookup_decompressor(int);