diff options
Diffstat (limited to 'old/xenolinux-2.4.16-sparse/drivers/block/rd.c')
| -rw-r--r-- | old/xenolinux-2.4.16-sparse/drivers/block/rd.c | 1009 |
1 files changed, 0 insertions, 1009 deletions
diff --git a/old/xenolinux-2.4.16-sparse/drivers/block/rd.c b/old/xenolinux-2.4.16-sparse/drivers/block/rd.c deleted file mode 100644 index ffcc9d3825..0000000000 --- a/old/xenolinux-2.4.16-sparse/drivers/block/rd.c +++ /dev/null @@ -1,1009 +0,0 @@ -/* - * ramdisk.c - Multiple RAM disk driver - gzip-loading version - v. 0.8 beta. - * - * (C) Chad Page, Theodore Ts'o, et. al, 1995. - * - * This RAM disk is designed to have filesystems created on it and mounted - * just like a regular floppy disk. - * - * It also does something suggested by Linus: use the buffer cache as the - * RAM disk data. This makes it possible to dynamically allocate the RAM disk - * buffer - with some consequences I have to deal with as I write this. - * - * This code is based on the original ramdisk.c, written mostly by - * Theodore Ts'o (TYT) in 1991. The code was largely rewritten by - * Chad Page to use the buffer cache to store the RAM disk data in - * 1995; Theodore then took over the driver again, and cleaned it up - * for inclusion in the mainline kernel. - * - * The original CRAMDISK code was written by Richard Lyons, and - * adapted by Chad Page to use the new RAM disk interface. Theodore - * Ts'o rewrote it so that both the compressed RAM disk loader and the - * kernel decompressor uses the same inflate.c codebase. The RAM disk - * loader now also loads into a dynamic (buffer cache based) RAM disk, - * not the old static RAM disk. Support for the old static RAM disk has - * been completely removed. - * - * Loadable module support added by Tom Dyas. - * - * Further cleanups by Chad Page (page0588@sundance.sjsu.edu): - * Cosmetic changes in #ifdef MODULE, code movement, etc. - * When the RAM disk module is removed, free the protected buffers - * Default RAM disk size changed to 2.88 MB - * - * Added initrd: Werner Almesberger & Hans Lermen, Feb '96 - * - * 4/25/96 : Made RAM disk size a parameter (default is now 4 MB) - * - Chad Page - * - * Add support for fs images split across >1 disk, Paul Gortmaker, Mar '98 - * - * Make block size and block size shift for RAM disks a global macro - * and set blk_size for -ENOSPC, Werner Fink <werner@suse.de>, Apr '99 - */ - -#include <linux/config.h> -#include <linux/sched.h> -#include <linux/minix_fs.h> -#include <linux/ext2_fs.h> -#include <linux/romfs_fs.h> -#include <linux/fs.h> -#include <linux/kernel.h> -#include <linux/hdreg.h> -#include <linux/string.h> -#include <linux/mm.h> -#include <linux/mman.h> -#include <linux/slab.h> -#include <linux/ioctl.h> -#include <linux/fd.h> -#include <linux/module.h> -#include <linux/init.h> -#include <linux/devfs_fs_kernel.h> -#include <linux/smp_lock.h> - -#include <asm/system.h> -#include <asm/uaccess.h> -#include <asm/byteorder.h> - -extern void wait_for_keypress(void); - -/* - * 35 has been officially registered as the RAMDISK major number, but - * so is the original MAJOR number of 1. We're using 1 in - * include/linux/major.h for now - */ -#define MAJOR_NR RAMDISK_MAJOR -#include <linux/blk.h> -#include <linux/blkpg.h> - -/* The RAM disk size is now a parameter */ -#define NUM_RAMDISKS 16 /* This cannot be overridden (yet) */ - -#ifndef MODULE -/* We don't have to load RAM disks or gunzip them in a module. */ -#define RD_LOADER -#define BUILD_CRAMDISK - -void rd_load(void); -static int crd_load(struct file *fp, struct file *outfp); - -#ifdef CONFIG_BLK_DEV_INITRD -static int initrd_users; -#endif -#endif - -/* Various static variables go here. Most are used only in the RAM disk code. - */ - -static unsigned long rd_length[NUM_RAMDISKS]; /* Size of RAM disks in bytes */ -static int rd_hardsec[NUM_RAMDISKS]; /* Size of real blocks in bytes */ -static int rd_blocksizes[NUM_RAMDISKS]; /* Size of 1024 byte blocks :) */ -static int rd_kbsize[NUM_RAMDISKS]; /* Size in blocks of 1024 bytes */ -static devfs_handle_t devfs_handle; -static struct block_device *rd_bdev[NUM_RAMDISKS];/* Protected device data */ - -/* - * Parameters for the boot-loading of the RAM disk. These are set by - * init/main.c (from arguments to the kernel command line) or from the - * architecture-specific setup routine (from the stored boot sector - * information). - */ -int rd_size = CONFIG_BLK_DEV_RAM_SIZE; /* Size of the RAM disks */ -/* - * It would be very desiderable to have a soft-blocksize (that in the case - * of the ramdisk driver is also the hardblocksize ;) of PAGE_SIZE because - * doing that we'll achieve a far better MM footprint. Using a rd_blocksize of - * BLOCK_SIZE in the worst case we'll make PAGE_SIZE/BLOCK_SIZE buffer-pages - * unfreeable. With a rd_blocksize of PAGE_SIZE instead we are sure that only - * 1 page will be protected. Depending on the size of the ramdisk you - * may want to change the ramdisk blocksize to achieve a better or worse MM - * behaviour. The default is still BLOCK_SIZE (needed by rd_load_image that - * supposes the filesystem in the image uses a BLOCK_SIZE blocksize). - */ -int rd_blocksize = BLOCK_SIZE; /* blocksize of the RAM disks */ - -#ifndef MODULE - -int rd_doload; /* 1 = load RAM disk, 0 = don't load */ -int rd_prompt = 1; /* 1 = prompt for RAM disk, 0 = don't prompt */ -int rd_image_start; /* starting block # of image */ -#ifdef CONFIG_BLK_DEV_INITRD -unsigned long initrd_start, initrd_end; -int mount_initrd = 1; /* zero if initrd should not be mounted */ -int initrd_below_start_ok; - -static int __init no_initrd(char *str) -{ - mount_initrd = 0; - return 1; -} - -__setup("noinitrd", no_initrd); - -#endif - -static int __init ramdisk_start_setup(char *str) -{ - rd_image_start = simple_strtol(str,NULL,0); - return 1; -} - -static int __init load_ramdisk(char *str) -{ - rd_doload = simple_strtol(str,NULL,0) & 3; - return 1; -} - -static int __init prompt_ramdisk(char *str) -{ - rd_prompt = simple_strtol(str,NULL,0) & 1; - return 1; -} - -static int __init ramdisk_size(char *str) -{ - rd_size = simple_strtol(str,NULL,0); - return 1; -} - -static int __init ramdisk_size2(char *str) -{ - return ramdisk_size(str); -} - -static int __init ramdisk_blocksize(char *str) -{ - rd_blocksize = simple_strtol(str,NULL,0); - return 1; -} - -__setup("ramdisk_start=", ramdisk_start_setup); -__setup("load_ramdisk=", load_ramdisk); -__setup("prompt_ramdisk=", prompt_ramdisk); -__setup("ramdisk=", ramdisk_size); -__setup("ramdisk_size=", ramdisk_size2); -__setup("ramdisk_blocksize=", ramdisk_blocksize); - -#endif - -/* - * Copyright (C) 2000 Linus Torvalds. - * 2000 Transmeta Corp. - * aops copied from ramfs. - */ -static int ramdisk_readpage(struct file *file, struct page * page) -{ - if (!Page_Uptodate(page)) { - memset(kmap(page), 0, PAGE_CACHE_SIZE); - kunmap(page); - flush_dcache_page(page); - SetPageUptodate(page); - } - UnlockPage(page); - return 0; -} - -static int ramdisk_prepare_write(struct file *file, struct page *page, unsigned offset, unsigned to) -{ - if (!Page_Uptodate(page)) { - void *addr = page_address(page); - memset(addr, 0, PAGE_CACHE_SIZE); - flush_dcache_page(page); - SetPageUptodate(page); - } - SetPageDirty(page); - return 0; -} - -static int ramdisk_commit_write(struct file *file, struct page *page, unsigned offset, unsigned to) -{ - return 0; -} - -static struct address_space_operations ramdisk_aops = { - readpage: ramdisk_readpage, - writepage: fail_writepage, - prepare_write: ramdisk_prepare_write, - commit_write: ramdisk_commit_write, -}; - -static int rd_blkdev_pagecache_IO(int rw, struct buffer_head * sbh, int minor) -{ - struct address_space * mapping; - unsigned long index; - int offset, size, err; - - err = -EIO; - err = 0; - mapping = rd_bdev[minor]->bd_inode->i_mapping; - - index = sbh->b_rsector >> (PAGE_CACHE_SHIFT - 9); - offset = (sbh->b_rsector << 9) & ~PAGE_CACHE_MASK; - size = sbh->b_size; - - do { - int count; - struct page ** hash; - struct page * page; - char * src, * dst; - int unlock = 0; - - count = PAGE_CACHE_SIZE - offset; - if (count > size) - count = size; - size -= count; - - hash = page_hash(mapping, index); - page = __find_get_page(mapping, index, hash); - if (!page) { - page = grab_cache_page(mapping, index); - err = -ENOMEM; - if (!page) - goto out; - err = 0; - - if (!Page_Uptodate(page)) { - memset(kmap(page), 0, PAGE_CACHE_SIZE); - kunmap(page); - SetPageUptodate(page); - } - - unlock = 1; - } - - index++; - - if (rw == READ) { - src = kmap(page); - src += offset; - dst = bh_kmap(sbh); - } else { - dst = kmap(page); - dst += offset; - src = bh_kmap(sbh); - } - offset = 0; - - memcpy(dst, src, count); - - kunmap(page); - bh_kunmap(sbh); - - if (rw == READ) { - flush_dcache_page(page); - } else { - SetPageDirty(page); - } - if (unlock) - UnlockPage(page); - __free_page(page); - } while (size); - - out: - return err; -} - -/* - * Basically, my strategy here is to set up a buffer-head which can't be - * deleted, and make that my Ramdisk. If the request is outside of the - * allocated size, we must get rid of it... - * - * 19-JAN-1998 Richard Gooch <rgooch@atnf.csiro.au> Added devfs support - * - */ -static int rd_make_request(request_queue_t * q, int rw, struct buffer_head *sbh) -{ - unsigned int minor; - unsigned long offset, len; - - minor = MINOR(sbh->b_rdev); - - if (minor >= NUM_RAMDISKS) - goto fail; - - - offset = sbh->b_rsector << 9; - len = sbh->b_size; - - if ((offset + len) > rd_length[minor]) - goto fail; - - if (rw==READA) - rw=READ; - if ((rw != READ) && (rw != WRITE)) { - printk(KERN_INFO "RAMDISK: bad command: %d\n", rw); - goto fail; - } - - if (rd_blkdev_pagecache_IO(rw, sbh, minor)) - goto fail; - - sbh->b_end_io(sbh,1); - return 0; - fail: - sbh->b_end_io(sbh,0); - return 0; -} - -static int rd_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) -{ - int error = -EINVAL; - unsigned int minor; - - if (!inode || !inode->i_rdev) - goto out; - - minor = MINOR(inode->i_rdev); - - switch (cmd) { - case BLKFLSBUF: - if (!capable(CAP_SYS_ADMIN)) - return -EACCES; - /* special: we want to release the ramdisk memory, - it's not like with the other blockdevices where - this ioctl only flushes away the buffer cache. */ - error = -EBUSY; - down(&inode->i_bdev->bd_sem); - if (inode->i_bdev->bd_openers <= 2) { - truncate_inode_pages(inode->i_mapping, 0); - error = 0; - } - up(&inode->i_bdev->bd_sem); - break; - case BLKGETSIZE: /* Return device size */ - if (!arg) - break; - error = put_user(rd_kbsize[minor] << 1, (unsigned long *) arg); - break; - case BLKGETSIZE64: - error = put_user((u64)rd_kbsize[minor]<<10, (u64*)arg); - break; - case BLKROSET: - case BLKROGET: - case BLKSSZGET: - error = blk_ioctl(inode->i_rdev, cmd, arg); - }; -out: - return error; -} - - -#ifdef CONFIG_BLK_DEV_INITRD - -static ssize_t initrd_read(struct file *file, char *buf, - size_t count, loff_t *ppos) -{ - int left; - - left = initrd_end - initrd_start - *ppos; - if (count > left) count = left; - if (count == 0) return 0; - copy_to_user(buf, (char *)initrd_start + *ppos, count); - *ppos += count; - return count; -} - - -static int initrd_release(struct inode *inode,struct file *file) -{ - extern void free_initrd_mem(unsigned long, unsigned long); - - lock_kernel(); - if (!--initrd_users) { - free_initrd_mem(initrd_start, initrd_end); - initrd_start = 0; - } - unlock_kernel(); - blkdev_put(inode->i_bdev, BDEV_FILE); - return 0; -} - - -static struct file_operations initrd_fops = { - read: initrd_read, - release: initrd_release, -}; - -#endif - - -static int rd_open(struct inode * inode, struct file * filp) -{ - int unit = DEVICE_NR(inode->i_rdev); - -#ifdef CONFIG_BLK_DEV_INITRD - if (unit == INITRD_MINOR) { - if (!initrd_start) return -ENODEV; - initrd_users++; - filp->f_op = &initrd_fops; - return 0; - } -#endif - - if (unit >= NUM_RAMDISKS) - return -ENXIO; - - /* - * Immunize device against invalidate_buffers() and prune_icache(). - */ - if (rd_bdev[unit] == NULL) { - rd_bdev[unit] = bdget(kdev_t_to_nr(inode->i_rdev)); - rd_bdev[unit]->bd_openers++; - rd_bdev[unit]->bd_inode->i_mapping->a_ops = &ramdisk_aops; - } - - return 0; -} - -static struct block_device_operations rd_bd_op = { - owner: THIS_MODULE, - open: rd_open, - ioctl: rd_ioctl, -}; - -#ifdef MODULE -/* Before freeing the module, invalidate all of the protected buffers! */ -static void __exit rd_cleanup (void) -{ - int i; - - for (i = 0 ; i < NUM_RAMDISKS; i++) { - struct block_device *bdev = rd_bdev[i]; - rd_bdev[i] = NULL; - if (bdev) - blkdev_put(bdev, BDEV_FILE); - destroy_buffers(MKDEV(MAJOR_NR, i)); - } - - devfs_unregister (devfs_handle); - unregister_blkdev( MAJOR_NR, "ramdisk" ); - hardsect_size[MAJOR_NR] = NULL; - blksize_size[MAJOR_NR] = NULL; - blk_size[MAJOR_NR] = NULL; -} -#endif - -/* This is the registration and initialization section of the RAM disk driver */ -int __init rd_init (void) -{ - int i; - - if (rd_blocksize > PAGE_SIZE || rd_blocksize < 512 || - (rd_blocksize & (rd_blocksize-1))) - { - printk("RAMDISK: wrong blocksize %d, reverting to defaults\n", - rd_blocksize); - rd_blocksize = BLOCK_SIZE; - } - - if (register_blkdev(MAJOR_NR, "ramdisk", &rd_bd_op)) { - printk("RAMDISK: Could not get major %d", MAJOR_NR); - return -EIO; - } - - blk_queue_make_request(BLK_DEFAULT_QUEUE(MAJOR_NR), &rd_make_request); - - for (i = 0; i < NUM_RAMDISKS; i++) { - /* rd_size is given in kB */ - rd_length[i] = rd_size << 10; - rd_hardsec[i] = rd_blocksize; - rd_blocksizes[i] = rd_blocksize; - rd_kbsize[i] = rd_size; - } - devfs_handle = devfs_mk_dir (NULL, "rd", NULL); - devfs_register_series (devfs_handle, "%u", NUM_RAMDISKS, - DEVFS_FL_DEFAULT, MAJOR_NR, 0, - S_IFBLK | S_IRUSR | S_IWUSR, - &rd_bd_op, NULL); - - for (i = 0; i < NUM_RAMDISKS; i++) - register_disk(NULL, MKDEV(MAJOR_NR,i), 1, &rd_bd_op, rd_size<<1); - -#ifdef CONFIG_BLK_DEV_INITRD - /* We ought to separate initrd operations here */ - register_disk(NULL, MKDEV(MAJOR_NR,INITRD_MINOR), 1, &rd_bd_op, rd_size<<1); -#endif - - hardsect_size[MAJOR_NR] = rd_hardsec; /* Size of the RAM disk blocks */ - blksize_size[MAJOR_NR] = rd_blocksizes; /* Avoid set_blocksize() check */ - blk_size[MAJOR_NR] = rd_kbsize; /* Size of the RAM disk in kB */ - - /* rd_size is given in kB */ - printk("RAMDISK driver initialized: " - "%d RAM disks of %dK size %d blocksize\n", - NUM_RAMDISKS, rd_size, rd_blocksize); - - return 0; -} - -#ifdef MODULE -module_init(rd_init); -module_exit(rd_cleanup); -#endif - -/* loadable module support */ -MODULE_PARM (rd_size, "1i"); -MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes."); -MODULE_PARM (rd_blocksize, "i"); -MODULE_PARM_DESC(rd_blocksize, "Blocksize of each RAM disk in bytes."); - -MODULE_LICENSE("GPL"); - -/* End of non-loading portions of the RAM disk driver */ - -#ifdef RD_LOADER -/* - * 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 - * gzip - */ -static int __init -identify_ramdisk_image(kdev_t device, struct file *fp, int start_block) -{ - const int size = 512; - struct minix_super_block *minixsb; - struct ext2_super_block *ext2sb; - struct romfs_super_block *romfsb; - int nblocks = -1; - unsigned char *buf; - - buf = kmalloc(size, GFP_KERNEL); - if (buf == 0) - return -1; - - minixsb = (struct minix_super_block *) buf; - ext2sb = (struct ext2_super_block *) buf; - romfsb = (struct romfs_super_block *) buf; - memset(buf, 0xe5, size); - - /* - * Read block 0 to test for gzipped kernel - */ - if (fp->f_op->llseek) - fp->f_op->llseek(fp, start_block * BLOCK_SIZE, 0); - fp->f_pos = start_block * BLOCK_SIZE; - - fp->f_op->read(fp, buf, size, &fp->f_pos); - - /* - * If it matches the gzip magic numbers, return -1 - */ - if (buf[0] == 037 && ((buf[1] == 0213) || (buf[1] == 0236))) { - printk(KERN_NOTICE - "RAMDISK: Compressed image found at block %d\n", - start_block); - 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; - } - - /* - * Read block 1 to test for minix and ext2 superblock - */ - if (fp->f_op->llseek) - fp->f_op->llseek(fp, (start_block+1) * BLOCK_SIZE, 0); - fp->f_pos = (start_block+1) * BLOCK_SIZE; - - fp->f_op->read(fp, buf, size, &fp->f_pos); - - /* 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 */ - if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) { - printk(KERN_NOTICE - "RAMDISK: ext2 filesystem found at block %d\n", - start_block); - nblocks = le32_to_cpu(ext2sb->s_blocks_count); - goto done; - } - - printk(KERN_NOTICE - "RAMDISK: Couldn't find valid RAM disk image starting at %d.\n", - start_block); - -done: - if (fp->f_op->llseek) - fp->f_op->llseek(fp, start_block * BLOCK_SIZE, 0); - fp->f_pos = start_block * BLOCK_SIZE; - - kfree(buf); - return nblocks; -} - -/* - * This routine loads in the RAM disk image. - */ -static void __init rd_load_image(kdev_t device, int offset, int unit) -{ - struct inode *inode, *out_inode; - struct file infile, outfile; - struct dentry in_dentry, out_dentry; - mm_segment_t fs; - kdev_t ram_device; - int nblocks, i; - char *buf; - unsigned short rotate = 0; - unsigned short devblocks = 0; -#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES) && !defined(CONFIG_XENO) - char rotator[4] = { '|' , '/' , '-' , '\\' }; -#endif - ram_device = MKDEV(MAJOR_NR, unit); - - if ((inode = get_empty_inode()) == NULL) - return; - memset(&infile, 0, sizeof(infile)); - memset(&in_dentry, 0, sizeof(in_dentry)); - infile.f_mode = 1; /* read only */ - infile.f_dentry = &in_dentry; - in_dentry.d_inode = inode; - infile.f_op = &def_blk_fops; - init_special_inode(inode, S_IFBLK | S_IRUSR, kdev_t_to_nr(device)); - - if ((out_inode = get_empty_inode()) == NULL) - goto free_inode; - memset(&outfile, 0, sizeof(outfile)); - memset(&out_dentry, 0, sizeof(out_dentry)); - outfile.f_mode = 3; /* read/write */ - outfile.f_dentry = &out_dentry; - out_dentry.d_inode = out_inode; - outfile.f_op = &def_blk_fops; - init_special_inode(out_inode, S_IFBLK | S_IRUSR | S_IWUSR, kdev_t_to_nr(ram_device)); - - if (blkdev_open(inode, &infile) != 0) { - iput(out_inode); - goto free_inode; - } - if (blkdev_open(out_inode, &outfile) != 0) - goto free_inodes; - - fs = get_fs(); - set_fs(KERNEL_DS); - - nblocks = identify_ramdisk_image(device, &infile, offset); - if (nblocks < 0) - goto done; - - if (nblocks == 0) { -#ifdef BUILD_CRAMDISK - if (crd_load(&infile, &outfile) == 0) - goto successful_load; -#else - printk(KERN_NOTICE - "RAMDISK: Kernel does not support compressed " - "RAM disk images\n"); -#endif - goto done; - } - - /* - * NOTE NOTE: nblocks suppose that the blocksize is BLOCK_SIZE, so - * rd_load_image will work only with filesystem BLOCK_SIZE wide! - * So make sure to use 1k blocksize while generating ext2fs - * ramdisk-images. - */ - if (nblocks > (rd_length[unit] >> BLOCK_SIZE_BITS)) { - printk("RAMDISK: image too big! (%d/%ld blocks)\n", - nblocks, rd_length[unit] >> BLOCK_SIZE_BITS); - goto done; - } - - /* - * OK, time to copy in the data - */ - buf = kmalloc(BLOCK_SIZE, GFP_KERNEL); - if (buf == 0) { - printk(KERN_ERR "RAMDISK: could not allocate buffer\n"); - goto done; - } - - if (blk_size[MAJOR(device)]) - devblocks = blk_size[MAJOR(device)][MINOR(device)]; - -#ifdef CONFIG_BLK_DEV_INITRD - if (MAJOR(device) == MAJOR_NR && MINOR(device) == INITRD_MINOR) - devblocks = nblocks; -#endif - - if (devblocks == 0) { - printk(KERN_ERR "RAMDISK: could not determine device size\n"); - goto done; - } - - printk(KERN_NOTICE "RAMDISK: Loading %d blocks [%d disk%s] into ram disk... ", - nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : ""); - for (i=0; i < nblocks; i++) { - if (i && (i % devblocks == 0)) { - printk("done disk #%d.\n", i/devblocks); - rotate = 0; - if (infile.f_op->release(inode, &infile) != 0) { - printk("Error closing the disk.\n"); - goto noclose_input; - } - printk("Please insert disk #%d and press ENTER\n", i/devblocks+1); - wait_for_keypress(); - if (blkdev_open(inode, &infile) != 0) { - printk("Error opening disk.\n"); - goto noclose_input; - } - infile.f_pos = 0; - printk("Loading disk #%d... ", i/devblocks+1); - } - infile.f_op->read(&infile, buf, BLOCK_SIZE, &infile.f_pos); - outfile.f_op->write(&outfile, buf, BLOCK_SIZE, &outfile.f_pos); -#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES) && !defined(CONFIG_XENO) - if (!(i % 16)) { - printk("%c\b", rotator[rotate & 0x3]); - rotate++; - } -#endif - } - printk("done.\n"); - kfree(buf); - -successful_load: - ROOT_DEV = MKDEV(MAJOR_NR, unit); - if (ROOT_DEVICE_NAME != NULL) strcpy (ROOT_DEVICE_NAME, "rd/0"); - -done: - infile.f_op->release(inode, &infile); -noclose_input: - blkdev_close(out_inode, &outfile); - iput(inode); - iput(out_inode); - set_fs(fs); - return; -free_inodes: /* free inodes on error */ - iput(out_inode); - infile.f_op->release(inode, &infile); -free_inode: - iput(inode); -} - -#ifdef CONFIG_MAC_FLOPPY -int swim3_fd_eject(int devnum); -#endif - -static void __init rd_load_disk(int n) -{ - - if (rd_doload == 0) - return; - - if (MAJOR(ROOT_DEV) != FLOPPY_MAJOR -#ifdef CONFIG_BLK_DEV_INITRD - && MAJOR(real_root_dev) != FLOPPY_MAJOR -#endif - ) - return; - - if (rd_prompt) { -#ifdef CONFIG_BLK_DEV_FD - floppy_eject(); -#endif -#ifdef CONFIG_MAC_FLOPPY - if(MAJOR(ROOT_DEV) == FLOPPY_MAJOR) - swim3_fd_eject(MINOR(ROOT_DEV)); - else if(MAJOR(real_root_dev) == FLOPPY_MAJOR) - swim3_fd_eject(MINOR(real_root_dev)); -#endif - printk(KERN_NOTICE - "VFS: Insert root floppy disk to be loaded into RAM disk and press ENTER\n"); - wait_for_keypress(); - } - - rd_load_image(ROOT_DEV,rd_image_start, n); - -} - -void __init rd_load(void) -{ - rd_load_disk(0); -} - -void __init rd_load_secondary(void) -{ - rd_load_disk(1); -} - -#ifdef CONFIG_BLK_DEV_INITRD -void __init initrd_load(void) -{ - rd_load_image(MKDEV(MAJOR_NR, INITRD_MINOR),rd_image_start,0); -} -#endif - -#endif /* RD_LOADER */ - -#ifdef BUILD_CRAMDISK - -/* - * gzip declarations - */ - -#define OF(args) args - -#ifndef memzero -#define memzero(s, n) memset ((s), 0, (n)) -#endif - -typedef unsigned char uch; -typedef unsigned short ush; -typedef unsigned long ulg; - -#define INBUFSIZ 4096 -#define WSIZE 0x8000 /* window size--must be a power of two, and */ - /* at least 32K for zip's deflate method */ - -static uch *inbuf; -static uch *window; - -static unsigned insize; /* valid bytes in inbuf */ -static unsigned inptr; /* index of next byte to be processed in inbuf */ -static unsigned outcnt; /* bytes in output buffer */ -static int exit_code; -static long bytes_out; -static struct file *crd_infp, *crd_outfp; - -#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf()) - -/* Diagnostic functions (stubbed out) */ -#define Assert(cond,msg) -#define Trace(x) -#define Tracev(x) -#define Tracevv(x) -#define Tracec(c,x) -#define Tracecv(c,x) - -#define STATIC static - -static int fill_inbuf(void); -static void flush_window(void); -static void *malloc(int size); -static void free(void *where); -static void error(char *m); -static void gzip_mark(void **); -static void gzip_release(void **); - -#include "../../lib/inflate.c" - -static void __init *malloc(int size) -{ - return kmalloc(size, GFP_KERNEL); -} - -static void __init free(void *where) -{ - kfree(where); -} - -static void __init gzip_mark(void **ptr) -{ -} - -static void __init gzip_release(void **ptr) -{ -} - - -/* =========================================================================== - * Fill the input buffer. This is called only when the buffer is empty - * and at least one byte is really needed. - */ -static int __init fill_inbuf(void) -{ - if (exit_code) return -1; - - insize = crd_infp->f_op->read(crd_infp, inbuf, INBUFSIZ, - &crd_infp->f_pos); - if (insize == 0) return -1; - - inptr = 1; - - return inbuf[0]; -} - -/* =========================================================================== - * Write the output window window[0..outcnt-1] and update crc and bytes_out. - * (Used for the decompressed data only.) - */ -static void __init flush_window(void) -{ - ulg c = crc; /* temporary variable */ - unsigned n; - uch *in, ch; - - crd_outfp->f_op->write(crd_outfp, window, outcnt, &crd_outfp->f_pos); - in = window; - for (n = 0; n < outcnt; n++) { - ch = *in++; - c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8); - } - crc = c; - bytes_out += (ulg)outcnt; - outcnt = 0; -} - -static void __init error(char *x) -{ - printk(KERN_ERR "%s", x); - exit_code = 1; -} - -static int __init -crd_load(struct file * fp, struct file *outfp) -{ - int result; - - insize = 0; /* valid bytes in inbuf */ - inptr = 0; /* index of next byte to be processed in inbuf */ - outcnt = 0; /* bytes in output buffer */ - exit_code = 0; - bytes_out = 0; - crc = (ulg)0xffffffffL; /* shift register contents */ - - crd_infp = fp; - crd_outfp = outfp; - inbuf = kmalloc(INBUFSIZ, GFP_KERNEL); - if (inbuf == 0) { - printk(KERN_ERR "RAMDISK: Couldn't allocate gzip buffer\n"); - return -1; - } - window = kmalloc(WSIZE, GFP_KERNEL); - if (window == 0) { - printk(KERN_ERR "RAMDISK: Couldn't allocate gzip window\n"); - kfree(inbuf); - return -1; - } - makecrc(); - result = gunzip(); - kfree(inbuf); - kfree(window); - return result; -} - -#endif /* BUILD_CRAMDISK */ - |