[mirror_ubuntu-bionic-kernel.git] / init / do_mounts_rd.c


#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/minix_fs.h>
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <linux/cramfs_fs.h>
#include <linux/initrd.h>
#include <linux/string.h>
#include <linux/slab.h>

#include "do_mounts.h"
#include "../fs/squashfs/squashfs_fs.h"

#include <linux/decompress/generic.h>


int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */

static int __init prompt_ramdisk(char *str)
{
	rd_prompt = simple_strtol(str,NULL,0) & 1;
	return 1;
}
__setup("prompt_ramdisk=", prompt_ramdisk);

int __initdata rd_image_start;		/* starting block # of image */

static int __init ramdisk_start_setup(char *str)
{
	rd_image_start = simple_strtol(str,NULL,0);
	return 1;
}
__setup("ramdisk_start=", ramdisk_start_setup);

static int __init crd_load(int in_fd, int out_fd, decompress_fn deco);

/*
 * This routine tries to find a RAM disk image to load, and returns the
 * number of blocks to read for a non-compressed image, 0 if the image
 * is a compressed image, and -1 if an image with the right magic
 * numbers could not be found.
 *
 * We currently check for the following magic numbers:
 *	minix
 *	ext2
 *	romfs
 *	cramfs
 *	squashfs
 *	gzip
 */
static int __init
identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
{
	const int size = 512;
	struct minix_super_block *minixsb;
	struct romfs_super_block *romfsb;
	struct cramfs_super *cramfsb;
	struct squashfs_super_block *squashfsb;
	int nblocks = -1;
	unsigned char *buf;
	const char *compress_name;
	unsigned long n;

	buf = kmalloc(size, GFP_KERNEL);
	if (!buf)
		return -ENOMEM;

	minixsb = (struct minix_super_block *) buf;
	romfsb = (struct romfs_super_block *) buf;
	cramfsb = (struct cramfs_super *) buf;
	squashfsb = (struct squashfs_super_block *) buf;
	memset(buf, 0xe5, size);

	/*
	 * Read block 0 to test for compressed kernel
	 */
	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	sys_read(fd, buf, size);

	*decompressor = decompress_method(buf, size, &compress_name);
	if (compress_name) {
		printk(KERN_NOTICE "RAMDISK: %s image found at block %d\n",
		       compress_name, start_block);
		if (!*decompressor)
			printk(KERN_EMERG
			       "RAMDISK: %s decompressor not configured!\n",
			       compress_name);
		nblocks = 0;
		goto done;
	}

	/* romfs is at block zero too */
	if (romfsb->word0 == ROMSB_WORD0 &&
	    romfsb->word1 == ROMSB_WORD1) {
		printk(KERN_NOTICE
		       "RAMDISK: romfs filesystem found at block %d\n",
		       start_block);
		nblocks = (ntohl(romfsb->size)+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
		goto done;
	}

	if (cramfsb->magic == CRAMFS_MAGIC) {
		printk(KERN_NOTICE
		       "RAMDISK: cramfs filesystem found at block %d\n",
		       start_block);
		nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
		goto done;
	}

	/* squashfs is at block zero too */
	if (le32_to_cpu(squashfsb->s_magic) == SQUASHFS_MAGIC) {
		printk(KERN_NOTICE
		       "RAMDISK: squashfs filesystem found at block %d\n",
		       start_block);
		nblocks = (le64_to_cpu(squashfsb->bytes_used) + BLOCK_SIZE - 1)
			 >> BLOCK_SIZE_BITS;
		goto done;
	}

	/*
	 * Read 512 bytes further to check if cramfs is padded
	 */
	sys_lseek(fd, start_block * BLOCK_SIZE + 0x200, 0);
	sys_read(fd, buf, size);

	if (cramfsb->magic == CRAMFS_MAGIC) {
		printk(KERN_NOTICE
		       "RAMDISK: cramfs filesystem found at block %d\n",
		       start_block);
		nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
		goto done;
	}

	/*
	 * Read block 1 to test for minix and ext2 superblock
	 */
	sys_lseek(fd, (start_block+1) * BLOCK_SIZE, 0);
	sys_read(fd, buf, size);

	/* Try minix */
	if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
	    minixsb->s_magic == MINIX_SUPER_MAGIC2) {
		printk(KERN_NOTICE
		       "RAMDISK: Minix filesystem found at block %d\n",
		       start_block);
		nblocks = minixsb->s_nzones << minixsb->s_log_zone_size;
		goto done;
	}

	/* Try ext2 */
	n = ext2_image_size(buf);
	if (n) {
		printk(KERN_NOTICE
		       "RAMDISK: ext2 filesystem found at block %d\n",
		       start_block);
		nblocks = n;
		goto done;
	}

	printk(KERN_NOTICE
	       "RAMDISK: Couldn't find valid RAM disk image starting at %d.\n",
	       start_block);

done:
	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	kfree(buf);
	return nblocks;
}

int __init rd_load_image(char *from)
{
	int res = 0;
	int in_fd, out_fd;
	unsigned long rd_blocks, devblocks;
	int nblocks, i, disk;
	char *buf = NULL;
	unsigned short rotate = 0;
	decompress_fn decompressor = NULL;
#if !defined(CONFIG_S390)
	char rotator[4] = { '|' , '/' , '-' , '\\' };
#endif

	out_fd = sys_open((const char __user __force *) "/dev/ram", O_RDWR, 0);
	if (out_fd < 0)
		goto out;

	in_fd = sys_open(from, O_RDONLY, 0);
	if (in_fd < 0)
		goto noclose_input;

	nblocks = identify_ramdisk_image(in_fd, rd_image_start, &decompressor);
	if (nblocks < 0)
		goto done;

	if (nblocks == 0) {
		if (crd_load(in_fd, out_fd, decompressor) == 0)
			goto successful_load;
		goto done;
	}

	/*
	 * NOTE NOTE: nblocks is not actually blocks but
	 * the number of kibibytes of data to load into a ramdisk.
	 * So any ramdisk block size that is a multiple of 1KiB should
	 * work when the appropriate ramdisk_blocksize is specified
	 * on the command line.
	 *
	 * The default ramdisk_blocksize is 1KiB and it is generally
	 * silly to use anything else, so make sure to use 1KiB
	 * blocksize while generating ext2fs ramdisk-images.
	 */
	if (sys_ioctl(out_fd, BLKGETSIZE, (unsigned long)&rd_blocks) < 0)
		rd_blocks = 0;
	else
		rd_blocks >>= 1;

	if (nblocks > rd_blocks) {
		printk("RAMDISK: image too big! (%dKiB/%ldKiB)\n",
		       nblocks, rd_blocks);
		goto done;
	}

	/*
	 * OK, time to copy in the data
	 */
	if (sys_ioctl(in_fd, BLKGETSIZE, (unsigned long)&devblocks) < 0)
		devblocks = 0;
	else
		devblocks >>= 1;

	if (strcmp(from, "/initrd.image") == 0)
		devblocks = nblocks;

	if (devblocks == 0) {
		printk(KERN_ERR "RAMDISK: could not determine device size\n");
		goto done;
	}

	buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
	if (!buf) {
		printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
		goto done;
	}

	printk(KERN_NOTICE "RAMDISK: Loading %dKiB [%ld disk%s] into ram disk... ",
		nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : "");
	for (i = 0, disk = 1; i < nblocks; i++) {
		if (i && (i % devblocks == 0)) {
			printk("done disk #%d.\n", disk++);
			rotate = 0;
			if (sys_close(in_fd)) {
				printk("Error closing the disk.\n");
				goto noclose_input;
			}
			change_floppy("disk #%d", disk);
			in_fd = sys_open(from, O_RDONLY, 0);
			if (in_fd < 0)  {
				printk("Error opening disk.\n");
				goto noclose_input;
			}
			printk("Loading disk #%d... ", disk);
		}
		sys_read(in_fd, buf, BLOCK_SIZE);
		sys_write(out_fd, buf, BLOCK_SIZE);
#if !defined(CONFIG_S390)
		if (!(i % 16)) {
			printk("%c\b", rotator[rotate & 0x3]);
			rotate++;
		}
#endif
	}
	printk("done.\n");

successful_load:
	res = 1;
done:
	sys_close(in_fd);
noclose_input:
	sys_close(out_fd);
out:
	kfree(buf);
	sys_unlink((const char __user __force *) "/dev/ram");
	return res;
}

int __init rd_load_disk(int n)
{
	if (rd_prompt)
		change_floppy("root floppy disk to be loaded into RAM disk");
	create_dev("/dev/root", ROOT_DEV);
	create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n));
	return rd_load_image("/dev/root");
}

static int exit_code;
static int decompress_error;
static int crd_infd, crd_outfd;

static int __init compr_fill(void *buf, unsigned int len)
{
	int r = sys_read(crd_infd, buf, len);
	if (r < 0)
		printk(KERN_ERR "RAMDISK: error while reading compressed data");
	else if (r == 0)
		printk(KERN_ERR "RAMDISK: EOF while reading compressed data");
	return r;
}

static int __init compr_flush(void *window, unsigned int outcnt)
{
	int written = sys_write(crd_outfd, window, outcnt);
	if (written != outcnt) {
		if (decompress_error == 0)
			printk(KERN_ERR
			       "RAMDISK: incomplete write (%d != %d)\n",
			       written, outcnt);
		decompress_error = 1;
		return -1;
	}
	return outcnt;
}

static void __init error(char *x)
{
	printk(KERN_ERR "%s\n", x);
	exit_code = 1;
	decompress_error = 1;
}

static int __init crd_load(int in_fd, int out_fd, decompress_fn deco)
{
	int result;
	crd_infd = in_fd;
	crd_outfd = out_fd;
	result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
	if (decompress_error)
		result = 1;
	return result;
}
Commit	Line	Data
1da177e4 LT	1
	2	#include <linux/kernel.h>
	3	#include <linux/fs.h>
	4	#include <linux/minix_fs.h>
	5	#include <linux/ext2_fs.h>
	6	#include <linux/romfs_fs.h>
	7	#include <linux/cramfs_fs.h>
	8	#include <linux/initrd.h>
	9	#include <linux/string.h>
5a0e3ad6	10	#include <linux/slab.h>
1da177e4 LT	11
1da177e4 LT	12	#include "do_mounts.h"
b8fed87d	13	#include "../fs/squashfs/squashfs_fs.h"
1da177e4	14
30d65dbf AK	15	#include <linux/decompress/generic.h>
30d65dbf AK	16
30d65dbf	17
1da177e4 LT	18	int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */
	19
	20	static int __init prompt_ramdisk(char *str)
	21	{
	22	rd_prompt = simple_strtol(str,NULL,0) & 1;
	23	return 1;
	24	}
	25	__setup("prompt_ramdisk=", prompt_ramdisk);
	26
	27	int __initdata rd_image_start; /* starting block # of image */
	28
	29	static int __init ramdisk_start_setup(char *str)
	30	{
	31	rd_image_start = simple_strtol(str,NULL,0);
	32	return 1;
	33	}
	34	__setup("ramdisk_start=", ramdisk_start_setup);
	35
30d65dbf	36	static int __init crd_load(int in_fd, int out_fd, decompress_fn deco);
1da177e4 LT	37
	38	/*
	39	* This routine tries to find a RAM disk image to load, and returns the
	40	* number of blocks to read for a non-compressed image, 0 if the image
	41	* is a compressed image, and -1 if an image with the right magic
	42	* numbers could not be found.
	43	*
	44	* We currently check for the following magic numbers:
b172fd88 PA	45	* minix
b172fd88 PA	46	* ext2
1da177e4 LT	47	* romfs
1da177e4 LT	48	* cramfs
b8fed87d	49	* squashfs
b172fd88	50	* gzip
1da177e4	51	*/
b172fd88	52	static int __init
30d65dbf	53	identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
1da177e4 LT	54	{
	55	const int size = 512;
	56	struct minix_super_block *minixsb;
1da177e4 LT	57	struct romfs_super_block *romfsb;
1da177e4 LT	58	struct cramfs_super *cramfsb;
b8fed87d	59	struct squashfs_super_block *squashfsb;
1da177e4 LT	60	int nblocks = -1;
1da177e4 LT	61	unsigned char *buf;
889c92d2	62	const char *compress_name;
39429c5e	63	unsigned long n;
1da177e4 LT	64
1da177e4 LT	65	buf = kmalloc(size, GFP_KERNEL);
c80544dc	66	if (!buf)
ea611b26	67	return -ENOMEM;
1da177e4 LT	68
1da177e4 LT	69	minixsb = (struct minix_super_block *) buf;
1da177e4 LT	70	romfsb = (struct romfs_super_block *) buf;
1da177e4 LT	71	cramfsb = (struct cramfs_super *) buf;
b8fed87d	72	squashfsb = (struct squashfs_super_block *) buf;
1da177e4 LT	73	memset(buf, 0xe5, size);
	74
	75	/*
b172fd88	76	* Read block 0 to test for compressed kernel
1da177e4 LT	77	*/
	78	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	79	sys_read(fd, buf, size);
	80
889c92d2	81	*decompressor = decompress_method(buf, size, &compress_name);
23a22d57	82	if (compress_name) {
889c92d2 PA	83	printk(KERN_NOTICE "RAMDISK: %s image found at block %d\n",
889c92d2 PA	84	compress_name, start_block);
23a22d57	85	if (!*decompressor)
73310a16 PA	86	printk(KERN_EMERG
73310a16 PA	87	"RAMDISK: %s decompressor not configured!\n",
23a22d57	88	compress_name);
889c92d2 PA	89	nblocks = 0;
889c92d2 PA	90	goto done;
1da177e4 LT	91	}
	92
	93	/* romfs is at block zero too */
	94	if (romfsb->word0 == ROMSB_WORD0 &&
	95	romfsb->word1 == ROMSB_WORD1) {
	96	printk(KERN_NOTICE
	97	"RAMDISK: romfs filesystem found at block %d\n",
	98	start_block);
	99	nblocks = (ntohl(romfsb->size)+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
	100	goto done;
	101	}
	102
	103	if (cramfsb->magic == CRAMFS_MAGIC) {
	104	printk(KERN_NOTICE
	105	"RAMDISK: cramfs filesystem found at block %d\n",
	106	start_block);
	107	nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
	108	goto done;
	109	}
	110
b8fed87d PL	111	/* squashfs is at block zero too */
	112	if (le32_to_cpu(squashfsb->s_magic) == SQUASHFS_MAGIC) {
	113	printk(KERN_NOTICE
	114	"RAMDISK: squashfs filesystem found at block %d\n",
	115	start_block);
	116	nblocks = (le64_to_cpu(squashfsb->bytes_used) + BLOCK_SIZE - 1)
	117	>> BLOCK_SIZE_BITS;
	118	goto done;
	119	}
	120
f919b923 NA	121	/*
	122	* Read 512 bytes further to check if cramfs is padded
	123	*/
	124	sys_lseek(fd, start_block * BLOCK_SIZE + 0x200, 0);
	125	sys_read(fd, buf, size);
	126
	127	if (cramfsb->magic == CRAMFS_MAGIC) {
	128	printk(KERN_NOTICE
	129	"RAMDISK: cramfs filesystem found at block %d\n",
	130	start_block);
	131	nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
	132	goto done;
	133	}
	134
1da177e4 LT	135	/*
	136	* Read block 1 to test for minix and ext2 superblock
	137	*/
	138	sys_lseek(fd, (start_block+1) * BLOCK_SIZE, 0);
	139	sys_read(fd, buf, size);
	140
	141	/* Try minix */
	142	if (minixsb->s_magic == MINIX_SUPER_MAGIC \|\|
	143	minixsb->s_magic == MINIX_SUPER_MAGIC2) {
	144	printk(KERN_NOTICE
	145	"RAMDISK: Minix filesystem found at block %d\n",
	146	start_block);
	147	nblocks = minixsb->s_nzones << minixsb->s_log_zone_size;
	148	goto done;
	149	}
	150
	151	/* Try ext2 */
39429c5e AV	152	n = ext2_image_size(buf);
39429c5e AV	153	if (n) {
1da177e4 LT	154	printk(KERN_NOTICE
	155	"RAMDISK: ext2 filesystem found at block %d\n",
	156	start_block);
39429c5e	157	nblocks = n;
1da177e4 LT	158	goto done;
	159	}
	160
	161	printk(KERN_NOTICE
	162	"RAMDISK: Couldn't find valid RAM disk image starting at %d.\n",
	163	start_block);
b172fd88	164
1da177e4 LT	165	done:
	166	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	167	kfree(buf);
	168	return nblocks;
	169	}
	170
	171	int __init rd_load_image(char *from)
	172	{
	173	int res = 0;
	174	int in_fd, out_fd;
	175	unsigned long rd_blocks, devblocks;
	176	int nblocks, i, disk;
	177	char *buf = NULL;
	178	unsigned short rotate = 0;
30d65dbf	179	decompress_fn decompressor = NULL;
bc58450b	180	#if !defined(CONFIG_S390)
1da177e4 LT	181	char rotator[4] = { '\|' , '/' , '-' , '\\' };
	182	#endif
	183
562f5e63	184	out_fd = sys_open((const char __user __force *) "/dev/ram", O_RDWR, 0);
1da177e4 LT	185	if (out_fd < 0)
	186	goto out;
	187
	188	in_fd = sys_open(from, O_RDONLY, 0);
	189	if (in_fd < 0)
	190	goto noclose_input;
	191
30d65dbf	192	nblocks = identify_ramdisk_image(in_fd, rd_image_start, &decompressor);
1da177e4 LT	193	if (nblocks < 0)
	194	goto done;
	195
	196	if (nblocks == 0) {
30d65dbf	197	if (crd_load(in_fd, out_fd, decompressor) == 0)
1da177e4	198	goto successful_load;
1da177e4 LT	199	goto done;
	200	}
	201
	202	/*
	203	* NOTE NOTE: nblocks is not actually blocks but
	204	* the number of kibibytes of data to load into a ramdisk.
	205	* So any ramdisk block size that is a multiple of 1KiB should
	206	* work when the appropriate ramdisk_blocksize is specified
	207	* on the command line.
	208	*
	209	* The default ramdisk_blocksize is 1KiB and it is generally
	210	* silly to use anything else, so make sure to use 1KiB
	211	* blocksize while generating ext2fs ramdisk-images.
	212	*/
	213	if (sys_ioctl(out_fd, BLKGETSIZE, (unsigned long)&rd_blocks) < 0)
	214	rd_blocks = 0;
	215	else
	216	rd_blocks >>= 1;
	217
	218	if (nblocks > rd_blocks) {
	219	printk("RAMDISK: image too big! (%dKiB/%ldKiB)\n",
	220	nblocks, rd_blocks);
	221	goto done;
	222	}
b172fd88	223
1da177e4 LT	224	/*
	225	* OK, time to copy in the data
	226	*/
	227	if (sys_ioctl(in_fd, BLKGETSIZE, (unsigned long)&devblocks) < 0)
	228	devblocks = 0;
	229	else
	230	devblocks >>= 1;
	231
	232	if (strcmp(from, "/initrd.image") == 0)
	233	devblocks = nblocks;
	234
	235	if (devblocks == 0) {
	236	printk(KERN_ERR "RAMDISK: could not determine device size\n");
	237	goto done;
	238	}
	239
	240	buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
d613c3e2	241	if (!buf) {
1da177e4 LT	242	printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
	243	goto done;
	244	}
	245
	246	printk(KERN_NOTICE "RAMDISK: Loading %dKiB [%ld disk%s] into ram disk... ",
	247	nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : "");
	248	for (i = 0, disk = 1; i < nblocks; i++) {
	249	if (i && (i % devblocks == 0)) {
	250	printk("done disk #%d.\n", disk++);
	251	rotate = 0;
	252	if (sys_close(in_fd)) {
	253	printk("Error closing the disk.\n");
	254	goto noclose_input;
	255	}
	256	change_floppy("disk #%d", disk);
	257	in_fd = sys_open(from, O_RDONLY, 0);
	258	if (in_fd < 0) {
	259	printk("Error opening disk.\n");
	260	goto noclose_input;
	261	}
	262	printk("Loading disk #%d... ", disk);
	263	}
	264	sys_read(in_fd, buf, BLOCK_SIZE);
	265	sys_write(out_fd, buf, BLOCK_SIZE);
bc58450b	266	#if !defined(CONFIG_S390)
1da177e4 LT	267	if (!(i % 16)) {
	268	printk("%c\b", rotator[rotate & 0x3]);
	269	rotate++;
	270	}
	271	#endif
	272	}
	273	printk("done.\n");
	274
	275	successful_load:
	276	res = 1;
	277	done:
	278	sys_close(in_fd);
	279	noclose_input:
	280	sys_close(out_fd);
	281	out:
	282	kfree(buf);
562f5e63	283	sys_unlink((const char __user __force *) "/dev/ram");
1da177e4 LT	284	return res;
	285	}
	286
	287	int __init rd_load_disk(int n)
	288	{
	289	if (rd_prompt)
	290	change_floppy("root floppy disk to be loaded into RAM disk");
bdaf8529 GKH	291	create_dev("/dev/root", ROOT_DEV);
bdaf8529 GKH	292	create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n));
1da177e4 LT	293	return rd_load_image("/dev/root");
	294	}
	295
1da177e4	296	static int exit_code;
30d65dbf	297	static int decompress_error;
1da177e4 LT	298	static int crd_infd, crd_outfd;
1da177e4 LT	299
30d65dbf	300	static int __init compr_fill(void *buf, unsigned int len)
1da177e4	301	{
30d65dbf AK	302	int r = sys_read(crd_infd, buf, len);
	303	if (r < 0)
	304	printk(KERN_ERR "RAMDISK: error while reading compressed data");
	305	else if (r == 0)
	306	printk(KERN_ERR "RAMDISK: EOF while reading compressed data");
	307	return r;
1da177e4 LT	308	}
1da177e4 LT	309
30d65dbf	310	static int __init compr_flush(void *window, unsigned int outcnt)
1da177e4	311	{
30d65dbf AK	312	int written = sys_write(crd_outfd, window, outcnt);
	313	if (written != outcnt) {
	314	if (decompress_error == 0)
	315	printk(KERN_ERR
	316	"RAMDISK: incomplete write (%d != %d)\n",
	317	written, outcnt);
	318	decompress_error = 1;
	319	return -1;
	320	}
	321	return outcnt;
1da177e4 LT	322	}
	323
	324	static void __init error(char *x)
	325	{
	326	printk(KERN_ERR "%s\n", x);
	327	exit_code = 1;
30d65dbf	328	decompress_error = 1;
1da177e4 LT	329	}
1da177e4 LT	330
30d65dbf	331	static int __init crd_load(int in_fd, int out_fd, decompress_fn deco)
1da177e4 LT	332	{
1da177e4 LT	333	int result;
1da177e4 LT	334	crd_infd = in_fd;
1da177e4 LT	335	crd_outfd = out_fd;
30d65dbf AK	336	result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
30d65dbf AK	337	if (decompress_error)
1da177e4	338	result = 1;
1da177e4 LT	339	return result;
1da177e4 LT	340	}