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

/*
 * Many of the syscalls used in this file expect some of the arguments
 * to be __user pointers not __kernel pointers.  To limit the sparse
 * noise, turn off sparse checking for this file.
 */
#ifdef __CHECKER__
#undef __CHECKER__
#warning "Sparse checking disabled for this file"
#endif

#include <linux/kernel.h>
#include <linux/fs.h>
#include <linux/minix_fs.h>
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <uapi/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
 *	bzip2
 *	lzma
 *	xz
 *	lzo
 *	lz4
 */
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("/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.
	 */
	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)) {
			pr_cont("%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("/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 long __init compr_fill(void *buf, unsigned long len)
{
	long 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 long __init compr_flush(void *window, unsigned long outcnt)
{
	long written = sys_write(crd_outfd, window, outcnt);
	if (written != outcnt) {
		if (decompress_error == 0)
			printk(KERN_ERR
			       "RAMDISK: incomplete write (%ld != %ld)\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;

	if (!deco) {
		pr_emerg("Invalid ramdisk decompression routine.  "
			 "Select appropriate config option.\n");
		panic("Could not decompress initial ramdisk image.");
	}

	result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
	if (decompress_error)
		result = 1;
	return result;
}
Commit	Line	Data
c67e5382 HS	1	/*
	2	* Many of the syscalls used in this file expect some of the arguments
	3	* to be __user pointers not __kernel pointers. To limit the sparse
	4	* noise, turn off sparse checking for this file.
	5	*/
	6	#ifdef __CHECKER__
	7	#undef __CHECKER__
	8	#warning "Sparse checking disabled for this file"
	9	#endif
1da177e4 LT	10
	11	#include <linux/kernel.h>
	12	#include <linux/fs.h>
	13	#include <linux/minix_fs.h>
	14	#include <linux/ext2_fs.h>
	15	#include <linux/romfs_fs.h>
f7f4f4dd	16	#include <uapi/linux/cramfs_fs.h>
1da177e4 LT	17	#include <linux/initrd.h>
1da177e4 LT	18	#include <linux/string.h>
5a0e3ad6	19	#include <linux/slab.h>
1da177e4 LT	20
1da177e4 LT	21	#include "do_mounts.h"
b8fed87d	22	#include "../fs/squashfs/squashfs_fs.h"
1da177e4	23
30d65dbf AK	24	#include <linux/decompress/generic.h>
30d65dbf AK	25
30d65dbf	26
1da177e4 LT	27	int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */
	28
	29	static int __init prompt_ramdisk(char *str)
	30	{
	31	rd_prompt = simple_strtol(str,NULL,0) & 1;
	32	return 1;
	33	}
	34	__setup("prompt_ramdisk=", prompt_ramdisk);
	35
	36	int __initdata rd_image_start; /* starting block # of image */
	37
	38	static int __init ramdisk_start_setup(char *str)
	39	{
	40	rd_image_start = simple_strtol(str,NULL,0);
	41	return 1;
	42	}
	43	__setup("ramdisk_start=", ramdisk_start_setup);
	44
30d65dbf	45	static int __init crd_load(int in_fd, int out_fd, decompress_fn deco);
1da177e4 LT	46
	47	/*
	48	* This routine tries to find a RAM disk image to load, and returns the
	49	* number of blocks to read for a non-compressed image, 0 if the image
	50	* is a compressed image, and -1 if an image with the right magic
	51	* numbers could not be found.
	52	*
	53	* We currently check for the following magic numbers:
b172fd88 PA	54	* minix
b172fd88 PA	55	* ext2
1da177e4 LT	56	* romfs
1da177e4 LT	57	* cramfs
b8fed87d	58	* squashfs
b172fd88	59	* gzip
1bf49dd4	60	* bzip2
	61	* lzma
	62	* xz
	63	* lzo
	64	* lz4
1da177e4	65	*/
b172fd88	66	static int __init
30d65dbf	67	identify_ramdisk_image(int fd, int start_block, decompress_fn *decompressor)
1da177e4 LT	68	{
	69	const int size = 512;
	70	struct minix_super_block *minixsb;
1da177e4 LT	71	struct romfs_super_block *romfsb;
1da177e4 LT	72	struct cramfs_super *cramfsb;
b8fed87d	73	struct squashfs_super_block *squashfsb;
1da177e4 LT	74	int nblocks = -1;
1da177e4 LT	75	unsigned char *buf;
889c92d2	76	const char *compress_name;
39429c5e	77	unsigned long n;
1da177e4 LT	78
1da177e4 LT	79	buf = kmalloc(size, GFP_KERNEL);
c80544dc	80	if (!buf)
ea611b26	81	return -ENOMEM;
1da177e4 LT	82
1da177e4 LT	83	minixsb = (struct minix_super_block *) buf;
1da177e4 LT	84	romfsb = (struct romfs_super_block *) buf;
1da177e4 LT	85	cramfsb = (struct cramfs_super *) buf;
b8fed87d	86	squashfsb = (struct squashfs_super_block *) buf;
1da177e4 LT	87	memset(buf, 0xe5, size);
	88
	89	/*
b172fd88	90	* Read block 0 to test for compressed kernel
1da177e4 LT	91	*/
	92	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	93	sys_read(fd, buf, size);
	94
889c92d2	95	*decompressor = decompress_method(buf, size, &compress_name);
23a22d57	96	if (compress_name) {
889c92d2 PA	97	printk(KERN_NOTICE "RAMDISK: %s image found at block %d\n",
889c92d2 PA	98	compress_name, start_block);
23a22d57	99	if (!*decompressor)
73310a16 PA	100	printk(KERN_EMERG
73310a16 PA	101	"RAMDISK: %s decompressor not configured!\n",
23a22d57	102	compress_name);
889c92d2 PA	103	nblocks = 0;
889c92d2 PA	104	goto done;
1da177e4 LT	105	}
	106
	107	/* romfs is at block zero too */
	108	if (romfsb->word0 == ROMSB_WORD0 &&
	109	romfsb->word1 == ROMSB_WORD1) {
	110	printk(KERN_NOTICE
	111	"RAMDISK: romfs filesystem found at block %d\n",
	112	start_block);
	113	nblocks = (ntohl(romfsb->size)+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
	114	goto done;
	115	}
	116
	117	if (cramfsb->magic == CRAMFS_MAGIC) {
	118	printk(KERN_NOTICE
	119	"RAMDISK: cramfs filesystem found at block %d\n",
	120	start_block);
	121	nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
	122	goto done;
	123	}
	124
b8fed87d PL	125	/* squashfs is at block zero too */
	126	if (le32_to_cpu(squashfsb->s_magic) == SQUASHFS_MAGIC) {
	127	printk(KERN_NOTICE
	128	"RAMDISK: squashfs filesystem found at block %d\n",
	129	start_block);
	130	nblocks = (le64_to_cpu(squashfsb->bytes_used) + BLOCK_SIZE - 1)
	131	>> BLOCK_SIZE_BITS;
	132	goto done;
	133	}
	134
f919b923 NA	135	/*
	136	* Read 512 bytes further to check if cramfs is padded
	137	*/
	138	sys_lseek(fd, start_block * BLOCK_SIZE + 0x200, 0);
	139	sys_read(fd, buf, size);
	140
	141	if (cramfsb->magic == CRAMFS_MAGIC) {
	142	printk(KERN_NOTICE
	143	"RAMDISK: cramfs filesystem found at block %d\n",
	144	start_block);
	145	nblocks = (cramfsb->size + BLOCK_SIZE - 1) >> BLOCK_SIZE_BITS;
	146	goto done;
	147	}
	148
1da177e4 LT	149	/*
	150	* Read block 1 to test for minix and ext2 superblock
	151	*/
	152	sys_lseek(fd, (start_block+1) * BLOCK_SIZE, 0);
	153	sys_read(fd, buf, size);
	154
	155	/* Try minix */
	156	if (minixsb->s_magic == MINIX_SUPER_MAGIC \|\|
	157	minixsb->s_magic == MINIX_SUPER_MAGIC2) {
	158	printk(KERN_NOTICE
	159	"RAMDISK: Minix filesystem found at block %d\n",
	160	start_block);
	161	nblocks = minixsb->s_nzones << minixsb->s_log_zone_size;
	162	goto done;
	163	}
	164
	165	/* Try ext2 */
39429c5e AV	166	n = ext2_image_size(buf);
39429c5e AV	167	if (n) {
1da177e4 LT	168	printk(KERN_NOTICE
	169	"RAMDISK: ext2 filesystem found at block %d\n",
	170	start_block);
39429c5e	171	nblocks = n;
1da177e4 LT	172	goto done;
	173	}
	174
	175	printk(KERN_NOTICE
	176	"RAMDISK: Couldn't find valid RAM disk image starting at %d.\n",
	177	start_block);
b172fd88	178
1da177e4 LT	179	done:
	180	sys_lseek(fd, start_block * BLOCK_SIZE, 0);
	181	kfree(buf);
	182	return nblocks;
	183	}
	184
	185	int __init rd_load_image(char *from)
	186	{
	187	int res = 0;
	188	int in_fd, out_fd;
	189	unsigned long rd_blocks, devblocks;
	190	int nblocks, i, disk;
	191	char *buf = NULL;
	192	unsigned short rotate = 0;
30d65dbf	193	decompress_fn decompressor = NULL;
bc58450b	194	#if !defined(CONFIG_S390)
1da177e4 LT	195	char rotator[4] = { '\|' , '/' , '-' , '\\' };
	196	#endif
	197
c67e5382	198	out_fd = sys_open("/dev/ram", O_RDWR, 0);
1da177e4 LT	199	if (out_fd < 0)
	200	goto out;
	201
	202	in_fd = sys_open(from, O_RDONLY, 0);
	203	if (in_fd < 0)
	204	goto noclose_input;
	205
30d65dbf	206	nblocks = identify_ramdisk_image(in_fd, rd_image_start, &decompressor);
1da177e4 LT	207	if (nblocks < 0)
	208	goto done;
	209
	210	if (nblocks == 0) {
30d65dbf	211	if (crd_load(in_fd, out_fd, decompressor) == 0)
1da177e4	212	goto successful_load;
1da177e4 LT	213	goto done;
	214	}
	215
	216	/*
	217	* NOTE NOTE: nblocks is not actually blocks but
	218	* the number of kibibytes of data to load into a ramdisk.
1da177e4 LT	219	*/
	220	if (sys_ioctl(out_fd, BLKGETSIZE, (unsigned long)&rd_blocks) < 0)
	221	rd_blocks = 0;
	222	else
	223	rd_blocks >>= 1;
	224
	225	if (nblocks > rd_blocks) {
	226	printk("RAMDISK: image too big! (%dKiB/%ldKiB)\n",
	227	nblocks, rd_blocks);
	228	goto done;
	229	}
b172fd88	230
1da177e4 LT	231	/*
	232	* OK, time to copy in the data
	233	*/
	234	if (sys_ioctl(in_fd, BLKGETSIZE, (unsigned long)&devblocks) < 0)
	235	devblocks = 0;
	236	else
	237	devblocks >>= 1;
	238
	239	if (strcmp(from, "/initrd.image") == 0)
	240	devblocks = nblocks;
	241
	242	if (devblocks == 0) {
	243	printk(KERN_ERR "RAMDISK: could not determine device size\n");
	244	goto done;
	245	}
	246
	247	buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
d613c3e2	248	if (!buf) {
1da177e4 LT	249	printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
	250	goto done;
	251	}
	252
	253	printk(KERN_NOTICE "RAMDISK: Loading %dKiB [%ld disk%s] into ram disk... ",
	254	nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : "");
	255	for (i = 0, disk = 1; i < nblocks; i++) {
	256	if (i && (i % devblocks == 0)) {
	257	printk("done disk #%d.\n", disk++);
	258	rotate = 0;
	259	if (sys_close(in_fd)) {
	260	printk("Error closing the disk.\n");
	261	goto noclose_input;
	262	}
	263	change_floppy("disk #%d", disk);
	264	in_fd = sys_open(from, O_RDONLY, 0);
	265	if (in_fd < 0) {
	266	printk("Error opening disk.\n");
	267	goto noclose_input;
	268	}
	269	printk("Loading disk #%d... ", disk);
	270	}
	271	sys_read(in_fd, buf, BLOCK_SIZE);
	272	sys_write(out_fd, buf, BLOCK_SIZE);
bc58450b	273	#if !defined(CONFIG_S390)
1da177e4	274	if (!(i % 16)) {
18594e9b	275	pr_cont("%c\b", rotator[rotate & 0x3]);
1da177e4 LT	276	rotate++;
	277	}
	278	#endif
	279	}
	280	printk("done.\n");
	281
	282	successful_load:
	283	res = 1;
	284	done:
	285	sys_close(in_fd);
	286	noclose_input:
	287	sys_close(out_fd);
	288	out:
	289	kfree(buf);
c67e5382	290	sys_unlink("/dev/ram");
1da177e4 LT	291	return res;
	292	}
	293
	294	int __init rd_load_disk(int n)
	295	{
	296	if (rd_prompt)
	297	change_floppy("root floppy disk to be loaded into RAM disk");
bdaf8529 GKH	298	create_dev("/dev/root", ROOT_DEV);
bdaf8529 GKH	299	create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n));
1da177e4 LT	300	return rd_load_image("/dev/root");
	301	}
	302
1da177e4	303	static int exit_code;
30d65dbf	304	static int decompress_error;
1da177e4 LT	305	static int crd_infd, crd_outfd;
1da177e4 LT	306
d97b07c5	307	static long __init compr_fill(void *buf, unsigned long len)
1da177e4	308	{
d97b07c5	309	long r = sys_read(crd_infd, buf, len);
30d65dbf AK	310	if (r < 0)
	311	printk(KERN_ERR "RAMDISK: error while reading compressed data");
	312	else if (r == 0)
	313	printk(KERN_ERR "RAMDISK: EOF while reading compressed data");
	314	return r;
1da177e4 LT	315	}
1da177e4 LT	316
d97b07c5	317	static long __init compr_flush(void *window, unsigned long outcnt)
1da177e4	318	{
d97b07c5	319	long written = sys_write(crd_outfd, window, outcnt);
30d65dbf AK	320	if (written != outcnt) {
	321	if (decompress_error == 0)
	322	printk(KERN_ERR
d97b07c5	323	"RAMDISK: incomplete write (%ld != %ld)\n",
30d65dbf AK	324	written, outcnt);
	325	decompress_error = 1;
	326	return -1;
	327	}
	328	return outcnt;
1da177e4 LT	329	}
	330
	331	static void __init error(char *x)
	332	{
	333	printk(KERN_ERR "%s\n", x);
	334	exit_code = 1;
30d65dbf	335	decompress_error = 1;
1da177e4 LT	336	}
1da177e4 LT	337
30d65dbf	338	static int __init crd_load(int in_fd, int out_fd, decompress_fn deco)
1da177e4 LT	339	{
1da177e4 LT	340	int result;
1da177e4 LT	341	crd_infd = in_fd;
1da177e4 LT	342	crd_outfd = out_fd;
df3ef3af	343
	344	if (!deco) {
	345	pr_emerg("Invalid ramdisk decompression routine. "
	346	"Select appropriate config option.\n");
	347	panic("Could not decompress initial ramdisk image.");
	348	}
	349
30d65dbf AK	350	result = deco(NULL, 0, compr_fill, compr_flush, NULL, NULL, error);
30d65dbf AK	351	if (decompress_error)
1da177e4	352	result = 1;
1da177e4 LT	353	return result;
1da177e4 LT	354	}