+++ /dev/null
- 0 files changed
-
-Index: linux-2.6.0-test5/drivers/dump/Makefile
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/Makefile 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/Makefile 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,14 @@
-+#
-+# Makefile for the dump device drivers.
-+#
-+
-+dump-y := dump_setup.o dump_fmt.o dump_filters.o dump_scheme.o dump_execute.o
-+dump-$(CONFIG_X86) += dump_i386.o
-+dump-$(CONFIG_CRASH_DUMP_MEMDEV) += dump_memdev.o dump_overlay.o
-+dump-objs += $(dump-y)
-+
-+obj-$(CONFIG_CRASH_DUMP) += dump.o
-+obj-$(CONFIG_CRASH_DUMP_BLOCKDEV) += dump_blockdev.o
-+obj-$(CONFIG_CRASH_DUMP_NETDEV) += dump_netdev.o
-+obj-$(CONFIG_CRASH_DUMP_COMPRESS_RLE) += dump_rle.o
-+obj-$(CONFIG_CRASH_DUMP_COMPRESS_GZIP) += dump_gzip.o
-Index: linux-2.6.0-test5/drivers/dump/dump_blockdev.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_blockdev.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_blockdev.c 2003-09-26 14:29:10.000000000 +0800
-@@ -0,0 +1,461 @@
-+/*
-+ * Implements the dump driver interface for saving a dump to
-+ * a block device through the kernel's generic low level block i/o
-+ * routines.
-+ *
-+ * Started: June 2002 - Mohamed Abbas <mohamed.abbas@intel.com>
-+ * Moved original lkcd kiobuf dump i/o code from dump_base.c
-+ * to use generic dump device interfaces
-+ *
-+ * Sept 2002 - Bharata B. Rao <bharata@in.ibm.com>
-+ * Convert dump i/o to directly use bio instead of kiobuf for 2.5
-+ *
-+ * Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ * Rework to new dumpdev.h structures, implement open/close/
-+ * silence, misc fixes (blocknr removal, bio_add_page usage)
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#include <linux/types.h>
-+#include <linux/proc_fs.h>
-+#include <linux/module.h>
-+#include <linux/init.h>
-+#include <linux/blkdev.h>
-+#include <linux/bio.h>
-+#include <asm/hardirq.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+extern void *dump_page_buf;
-+
-+/* The end_io callback for dump i/o completion */
-+static int
-+dump_bio_end_io(struct bio *bio, unsigned int bytes_done, int error)
-+{
-+ struct dump_blockdev *dump_bdev;
-+
-+ if (bio->bi_size) {
-+ /* some bytes still left to transfer */
-+ return 1; /* not complete */
-+ }
-+
-+ dump_bdev = (struct dump_blockdev *)bio->bi_private;
-+ if (error) {
-+ printk("IO error while writing the dump, aborting\n");
-+ }
-+
-+ dump_bdev->err = error;
-+
-+ /* no wakeup needed, since caller polls for completion */
-+ return 0;
-+}
-+
-+/* Check if the dump bio is already mapped to the specified buffer */
-+static int
-+dump_block_map_valid(struct dump_blockdev *dev, struct page *page,
-+ int len)
-+{
-+ struct bio *bio = dev->bio;
-+ unsigned long bsize = 0;
-+
-+ if (!bio->bi_vcnt)
-+ return 0; /* first time, not mapped */
-+
-+
-+ if ((bio_page(bio) != page) || (len > bio->bi_vcnt << PAGE_SHIFT))
-+ return 0; /* buffer not mapped */
-+
-+ bsize = bdev_hardsect_size(bio->bi_bdev);
-+ if ((len & (PAGE_SIZE - 1)) || (len & bsize))
-+ return 0; /* alignment checks needed */
-+
-+ /* quick check to decide if we need to redo bio_add_page */
-+ if (bdev_get_queue(bio->bi_bdev)->merge_bvec_fn)
-+ return 0; /* device may have other restrictions */
-+
-+ return 1; /* already mapped */
-+}
-+
-+/*
-+ * Set up the dump bio for i/o from the specified buffer
-+ * Return value indicates whether the full buffer could be mapped or not
-+ */
-+static int
-+dump_block_map(struct dump_blockdev *dev, void *buf, int len)
-+{
-+ struct page *page = virt_to_page(buf);
-+ struct bio *bio = dev->bio;
-+ unsigned long bsize = 0;
-+
-+ bio->bi_bdev = dev->bdev;
-+ bio->bi_sector = (dev->start_offset + dev->ddev.curr_offset) >> 9;
-+ bio->bi_idx = 0; /* reset index to the beginning */
-+
-+ if (dump_block_map_valid(dev, page, len)) {
-+ /* already mapped and usable rightaway */
-+ bio->bi_size = len; /* reset size to the whole bio */
-+ } else {
-+ /* need to map the bio */
-+ bio->bi_size = 0;
-+ bio->bi_vcnt = 0;
-+ bsize = bdev_hardsect_size(bio->bi_bdev);
-+
-+ /* first a few sanity checks */
-+ if (len < bsize) {
-+ printk("map: len less than hardsect size \n");
-+ return -EINVAL;
-+ }
-+
-+ if ((unsigned long)buf & bsize) {
-+ printk("map: not aligned \n");
-+ return -EINVAL;
-+ }
-+
-+ /* assume contig. page aligned low mem buffer( no vmalloc) */
-+ if ((page_address(page) != buf) || (len & (PAGE_SIZE - 1))) {
-+ printk("map: invalid buffer alignment!\n");
-+ return -EINVAL;
-+ }
-+ /* finally we can go ahead and map it */
-+ while (bio->bi_size < len)
-+ if (bio_add_page(bio, page++, PAGE_SIZE, 0) == 0) {
-+ break;
-+ }
-+
-+ bio->bi_end_io = dump_bio_end_io;
-+ bio->bi_private = dev;
-+ }
-+
-+ if (bio->bi_size != len) {
-+ printk("map: bio size = %d not enough for len = %d!\n",
-+ bio->bi_size, len);
-+ return -E2BIG;
-+ }
-+ return 0;
-+}
-+
-+static void
-+dump_free_bio(struct bio *bio)
-+{
-+ if (bio)
-+ kfree(bio->bi_io_vec);
-+ kfree(bio);
-+}
-+
-+/*
-+ * Prepares the dump device so we can take a dump later.
-+ * The caller is expected to have filled up the kdev_id field in the
-+ * block dump dev structure.
-+ *
-+ * At dump time when dump_block_write() is invoked it will be too
-+ * late to recover, so as far as possible make sure obvious errors
-+ * get caught right here and reported back to the caller.
-+ */
-+static int
-+dump_block_open(struct dump_dev *dev, unsigned long arg)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+ struct block_device *bdev;
-+ int retval = 0;
-+ struct bio_vec *bvec;
-+
-+ /* make sure this is a valid block device */
-+ if (!arg) {
-+ retval = -EINVAL;
-+ goto err;
-+ }
-+
-+ /* get a corresponding block_dev struct for this */
-+ bdev = bdget((dev_t)arg);
-+ if (!bdev) {
-+ retval = -ENODEV;
-+ goto err;
-+ }
-+
-+ /* get the block device opened */
-+ if ((retval = blkdev_get(bdev, O_RDWR | O_LARGEFILE, 0, BDEV_RAW))) {
-+ goto err1;
-+ }
-+
-+ if ((dump_bdev->bio = kmalloc(sizeof(struct bio), GFP_KERNEL))
-+ == NULL) {
-+ printk("Cannot allocate bio\n");
-+ retval = -ENOMEM;
-+ goto err2;
-+ }
-+
-+ bio_init(dump_bdev->bio);
-+
-+ if ((bvec = kmalloc(sizeof(struct bio_vec) *
-+ (DUMP_BUFFER_SIZE >> PAGE_SHIFT), GFP_KERNEL)) == NULL) {
-+ retval = -ENOMEM;
-+ goto err3;
-+ }
-+
-+ /* assign the new dump dev structure */
-+ dump_bdev->kdev_id = new_decode_dev((dev_t)arg);
-+ dump_bdev->bdev = bdev;
-+
-+ /* make a note of the limit */
-+ dump_bdev->limit = bdev->bd_inode->i_size;
-+
-+ /* now make sure we can map the dump buffer */
-+ dump_bdev->bio->bi_io_vec = bvec;
-+ dump_bdev->bio->bi_max_vecs = DUMP_BUFFER_SIZE >> PAGE_SHIFT;
-+
-+ retval = dump_block_map(dump_bdev, dump_config.dumper->dump_buf,
-+ DUMP_BUFFER_SIZE);
-+
-+ if (retval) {
-+ printk("open: dump_block_map failed, ret %d\n", retval);
-+ goto err3;
-+ }
-+
-+ printk("Block device (%d,%d) successfully configured for dumping\n",
-+ MAJOR(dump_bdev->kdev_id),
-+ MINOR(dump_bdev->kdev_id));
-+
-+
-+ /* after opening the block device, return */
-+ return retval;
-+
-+err3: dump_free_bio(dump_bdev->bio);
-+ dump_bdev->bio = NULL;
-+err2: if (bdev) blkdev_put(bdev, BDEV_RAW);
-+ goto err;
-+err1: if (bdev) bdput(bdev);
-+ dump_bdev->bdev = NULL;
-+err: return retval;
-+}
-+
-+/*
-+ * Close the dump device and release associated resources
-+ * Invoked when unconfiguring the dump device.
-+ */
-+static int
-+dump_block_release(struct dump_dev *dev)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+
-+ /* release earlier bdev if present */
-+ if (dump_bdev->bdev) {
-+ blkdev_put(dump_bdev->bdev, BDEV_RAW);
-+ dump_bdev->bdev = NULL;
-+ }
-+
-+ dump_free_bio(dump_bdev->bio);
-+ dump_bdev->bio = NULL;
-+
-+ return 0;
-+}
-+
-+
-+/*
-+ * Prepare the dump device for use (silence any ongoing activity
-+ * and quiesce state) when the system crashes.
-+ */
-+static int
-+dump_block_silence(struct dump_dev *dev)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+ struct request_queue *q = bdev_get_queue(dump_bdev->bdev);
-+ int ret;
-+
-+ /* If we can't get request queue lock, refuse to take the dump */
-+ if (!spin_trylock(q->queue_lock))
-+ return -EBUSY;
-+
-+ ret = elv_queue_empty(q);
-+ spin_unlock(q->queue_lock);
-+
-+ /* For now we assume we have the device to ourselves */
-+ /* Just a quick sanity check */
-+ if (!ret) {
-+ /* i/o in flight - safer to quit */
-+ return -EBUSY;
-+ }
-+
-+ /*
-+ * Move to a softer level of silencing where no spin_lock_irqs
-+ * are held on other cpus
-+ */
-+ dump_silence_level = DUMP_SOFT_SPIN_CPUS;
-+
-+ __dump_irq_enable();
-+
-+ printk("Dumping to block device (%d,%d) on CPU %d ...\n",
-+ MAJOR(dump_bdev->kdev_id), MINOR(dump_bdev->kdev_id),
-+ smp_processor_id());
-+
-+ return 0;
-+}
-+
-+/*
-+ * Invoked when dumping is done. This is the time to put things back
-+ * (i.e. undo the effects of dump_block_silence) so the device is
-+ * available for normal use.
-+ */
-+static int
-+dump_block_resume(struct dump_dev *dev)
-+{
-+ __dump_irq_restore();
-+ return 0;
-+}
-+
-+
-+/*
-+ * Seek to the specified offset in the dump device.
-+ * Makes sure this is a valid offset, otherwise returns an error.
-+ */
-+static int
-+dump_block_seek(struct dump_dev *dev, loff_t off)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+ loff_t offset = off + dump_bdev->start_offset;
-+
-+ if (offset & ( PAGE_SIZE - 1)) {
-+ printk("seek: non-page aligned\n");
-+ return -EINVAL;
-+ }
-+
-+ if (offset & (bdev_hardsect_size(dump_bdev->bdev) - 1)) {
-+ printk("seek: not sector aligned \n");
-+ return -EINVAL;
-+ }
-+
-+ if (offset > dump_bdev->limit) {
-+ printk("seek: not enough space left on device!\n");
-+ return -ENOSPC;
-+ }
-+ dev->curr_offset = off;
-+ return 0;
-+}
-+
-+/*
-+ * Write out a buffer after checking the device limitations,
-+ * sector sizes, etc. Assumes the buffer is in directly mapped
-+ * kernel address space (not vmalloc'ed).
-+ *
-+ * Returns: number of bytes written or -ERRNO.
-+ */
-+static int
-+dump_block_write(struct dump_dev *dev, void *buf,
-+ unsigned long len)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+ loff_t offset = dev->curr_offset + dump_bdev->start_offset;
-+ int retval = -ENOSPC;
-+
-+ if (offset >= dump_bdev->limit) {
-+ printk("write: not enough space left on device!\n");
-+ goto out;
-+ }
-+
-+ /* don't write more blocks than our max limit */
-+ if (offset + len > dump_bdev->limit)
-+ len = dump_bdev->limit - offset;
-+
-+
-+ retval = dump_block_map(dump_bdev, buf, len);
-+ if (retval){
-+ printk("write: dump_block_map failed! err %d\n", retval);
-+ goto out;
-+ }
-+
-+ /*
-+ * Write out the data to disk.
-+ * Assumes the entire buffer mapped to a single bio, which we can
-+ * submit and wait for io completion. In the future, may consider
-+ * increasing the dump buffer size and submitting multiple bio s
-+ * for better throughput.
-+ */
-+ dump_bdev->err = -EAGAIN;
-+ submit_bio(WRITE, dump_bdev->bio);
-+
-+ dump_bdev->ddev.curr_offset += len;
-+ retval = len;
-+ out:
-+ return retval;
-+}
-+
-+/*
-+ * Name: dump_block_ready()
-+ * Func: check if the last dump i/o is over and ready for next request
-+ */
-+static int
-+dump_block_ready(struct dump_dev *dev, void *buf)
-+{
-+ struct dump_blockdev *dump_bdev = DUMP_BDEV(dev);
-+ request_queue_t *q = bdev_get_queue(dump_bdev->bio->bi_bdev);
-+
-+ /* check for io completion */
-+ if (dump_bdev->err == -EAGAIN) {
-+ q->unplug_fn(q);
-+ return -EAGAIN;
-+ }
-+
-+ if (dump_bdev->err) {
-+ printk("dump i/o err\n");
-+ return dump_bdev->err;
-+ }
-+
-+ return 0;
-+}
-+
-+
-+struct dump_dev_ops dump_blockdev_ops = {
-+ .open = dump_block_open,
-+ .release = dump_block_release,
-+ .silence = dump_block_silence,
-+ .resume = dump_block_resume,
-+ .seek = dump_block_seek,
-+ .write = dump_block_write,
-+ /* .read not implemented */
-+ .ready = dump_block_ready
-+};
-+
-+static struct dump_blockdev default_dump_blockdev = {
-+ .ddev = {.type_name = "blockdev", .ops = &dump_blockdev_ops,
-+ .curr_offset = 0},
-+ /*
-+ * leave enough room for the longest swap header possibly written
-+ * written by mkswap (likely the largest page size supported by
-+ * the arch
-+ */
-+ .start_offset = DUMP_HEADER_OFFSET,
-+ .err = 0
-+ /* assume the rest of the fields are zeroed by default */
-+};
-+
-+struct dump_blockdev *dump_blockdev = &default_dump_blockdev;
-+
-+static int __init
-+dump_blockdev_init(void)
-+{
-+ if (dump_register_device(&dump_blockdev->ddev) < 0) {
-+ printk("block device driver registration failed\n");
-+ return -1;
-+ }
-+
-+ printk("block device driver for LKCD registered\n");
-+ return 0;
-+}
-+
-+static void __exit
-+dump_blockdev_cleanup(void)
-+{
-+ dump_unregister_device(&dump_blockdev->ddev);
-+ printk("block device driver for LKCD unregistered\n");
-+}
-+
-+MODULE_AUTHOR("LKCD Development Team <lkcd-devel@lists.sourceforge.net>");
-+MODULE_DESCRIPTION("Block Dump Driver for Linux Kernel Crash Dump (LKCD)");
-+MODULE_LICENSE("GPL");
-+
-+module_init(dump_blockdev_init);
-+module_exit(dump_blockdev_cleanup);
-Index: linux-2.6.0-test5/drivers/dump/dump_execute.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_execute.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_execute.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,126 @@
-+/*
-+ * The file has the common/generic dump execution code
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ * Split and rewrote high level dump execute code to make use
-+ * of dump method interfaces.
-+ *
-+ * Derived from original code in dump_base.c created by
-+ * Matt Robinson <yakker@sourceforge.net>)
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * Assumes dumper and dump config settings are in place
-+ * (invokes corresponding dumper specific routines as applicable)
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+#include <linux/kernel.h>
-+#include <linux/notifier.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+struct notifier_block *dump_notifier_list; /* dump started/ended callback */
-+
-+/* Dump progress indicator */
-+void
-+dump_speedo(int i)
-+{
-+ static const char twiddle[4] = { '|', '\\', '-', '/' };
-+ printk("%c\b", twiddle[i&3]);
-+}
-+
-+/* Make the device ready and write out the header */
-+int dump_begin(void)
-+{
-+ int err = 0;
-+
-+ /* dump_dev = dump_config.dumper->dev; */
-+ dumper_reset();
-+ if ((err = dump_dev_silence())) {
-+ /* quiesce failed, can't risk continuing */
-+ /* Todo/Future: switch to alternate dump scheme if possible */
-+ printk("dump silence dev failed ! error %d\n", err);
-+ return err;
-+ }
-+
-+ pr_debug("Writing dump header\n");
-+ if ((err = dump_update_header())) {
-+ printk("dump update header failed ! error %d\n", err);
-+ dump_dev_resume();
-+ return err;
-+ }
-+
-+ dump_config.dumper->curr_offset = DUMP_BUFFER_SIZE;
-+
-+ return 0;
-+}
-+
-+/*
-+ * Write the dump terminator, a final header update and let go of
-+ * exclusive use of the device for dump.
-+ */
-+int dump_complete(void)
-+{
-+ int ret = 0;
-+
-+ if (dump_config.level != DUMP_LEVEL_HEADER) {
-+ if ((ret = dump_update_end_marker())) {
-+ printk("dump update end marker error %d\n", ret);
-+ }
-+ if ((ret = dump_update_header())) {
-+ printk("dump update header error %d\n", ret);
-+ }
-+ }
-+ ret = dump_dev_resume();
-+
-+ return ret;
-+}
-+
-+/* Saves all dump data */
-+int dump_execute_savedump(void)
-+{
-+ int ret = 0, err = 0;
-+
-+ if ((ret = dump_begin())) {
-+ return ret;
-+ }
-+
-+ if (dump_config.level != DUMP_LEVEL_HEADER) {
-+ ret = dump_sequencer();
-+ }
-+ if ((err = dump_complete())) {
-+ printk("Dump complete failed. Error %d\n", err);
-+ }
-+
-+ return ret;
-+}
-+
-+/* Does all the real work: Capture and save state */
-+int dump_generic_execute(const char *panic_str, const struct pt_regs *regs)
-+{
-+ int ret = 0;
-+
-+ if ((ret = dump_configure_header(panic_str, regs))) {
-+ printk("dump config header failed ! error %d\n", ret);
-+ return ret;
-+ }
-+
-+ /* tell interested parties that a dump is about to start */
-+ notifier_call_chain(&dump_notifier_list, DUMP_BEGIN,
-+ &dump_config.dump_device);
-+
-+ if (dump_config.level != DUMP_LEVEL_NONE)
-+ ret = dump_execute_savedump();
-+
-+ pr_debug("dumped %ld blocks of %d bytes each\n",
-+ dump_config.dumper->count, DUMP_BUFFER_SIZE);
-+
-+ /* tell interested parties that a dump has completed */
-+ notifier_call_chain(&dump_notifier_list, DUMP_END,
-+ &dump_config.dump_device);
-+
-+ return ret;
-+}
-Index: linux-2.6.0-test5/drivers/dump/dump_filters.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_filters.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_filters.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,143 @@
-+/*
-+ * Default filters to select data to dump for various passes.
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ * Split and rewrote default dump selection logic to generic dump
-+ * method interfaces
-+ * Derived from a portion of dump_base.c created by
-+ * Matt Robinson <yakker@sourceforge.net>)
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * Used during single-stage dumping and during stage 1 of the 2-stage scheme
-+ * (Stage 2 of the 2-stage scheme uses the fully transparent filters
-+ * i.e. passthru filters in dump_overlay.c)
-+ *
-+ * Future: Custom selective dump may involve a different set of filters.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/bootmem.h>
-+#include <linux/mm.h>
-+#include <linux/slab.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+
-+/* Copied from mm/bootmem.c - FIXME */
-+/* return the number of _pages_ that will be allocated for the boot bitmap */
-+unsigned long dump_calc_bootmap_pages (void)
-+{
-+ unsigned long mapsize;
-+ unsigned long pages = num_physpages;
-+
-+ mapsize = (pages+7)/8;
-+ mapsize = (mapsize + ~PAGE_MASK) & PAGE_MASK;
-+ mapsize >>= PAGE_SHIFT;
-+
-+ return mapsize;
-+}
-+
-+
-+#define DUMP_PFN_SAFETY_MARGIN 1024 /* 4 MB */
-+/* temporary */
-+extern unsigned long min_low_pfn;
-+
-+
-+int dump_low_page(struct page *p)
-+{
-+ return page_to_pfn(p) < min_low_pfn + dump_calc_bootmap_pages()
-+ + 1 + DUMP_PFN_SAFETY_MARGIN;
-+}
-+
-+static inline int kernel_page(struct page *p)
-+{
-+ /* FIXME: Need to exclude hugetlb pages. Clue: reserved but inuse */
-+ return PageReserved(p) || (!PageLRU(p) && PageInuse(p));
-+}
-+
-+static inline int user_page(struct page *p)
-+{
-+ return PageInuse(p) && (!PageReserved(p) && PageLRU(p));
-+}
-+
-+static inline int unreferenced_page(struct page *p)
-+{
-+ return !PageInuse(p) && !PageReserved(p);
-+}
-+
-+
-+/* loc marks the beginning of a range of pages */
-+int dump_filter_kernpages(int pass, unsigned long loc, unsigned long sz)
-+{
-+ struct page *page = (struct page *)loc;
-+ /* if any of the pages is a kernel page, select this set */
-+ while (sz) {
-+ if (dump_low_page(page) || kernel_page(page))
-+ return 1;
-+ sz -= PAGE_SIZE;
-+ page++;
-+ }
-+ return 0;
-+}
-+
-+
-+/* loc marks the beginning of a range of pages */
-+int dump_filter_userpages(int pass, unsigned long loc, unsigned long sz)
-+{
-+ struct page *page = (struct page *)loc;
-+ int ret = 0;
-+ /* select if the set has any user page, and no kernel pages */
-+ while (sz) {
-+ if (user_page(page) && !dump_low_page(page)) {
-+ ret = 1;
-+ } else if (kernel_page(page) || dump_low_page(page)) {
-+ return 0;
-+ }
-+ page++;
-+ sz -= PAGE_SIZE;
-+ }
-+ return ret;
-+}
-+
-+
-+
-+/* loc marks the beginning of a range of pages */
-+int dump_filter_unusedpages(int pass, unsigned long loc, unsigned long sz)
-+{
-+ struct page *page = (struct page *)loc;
-+
-+ /* select if the set does not have any used pages */
-+ while (sz) {
-+ if (!unreferenced_page(page) || dump_low_page(page)) {
-+ return 0;
-+ }
-+ page++;
-+ sz -= PAGE_SIZE;
-+ }
-+ return 1;
-+}
-+
-+/* dummy: last (non-existent) pass */
-+int dump_filter_none(int pass, unsigned long loc, unsigned long sz)
-+{
-+ return 0;
-+}
-+
-+/* TBD: resolve level bitmask ? */
-+struct dump_data_filter dump_filter_table[] = {
-+ { .name = "kern", .selector = dump_filter_kernpages,
-+ .level_mask = DUMP_MASK_KERN},
-+ { .name = "user", .selector = dump_filter_userpages,
-+ .level_mask = DUMP_MASK_USED},
-+ { .name = "unused", .selector = dump_filter_unusedpages,
-+ .level_mask = DUMP_MASK_UNUSED},
-+ { .name = "none", .selector = dump_filter_none,
-+ .level_mask = DUMP_MASK_REST},
-+ { .name = "", .selector = NULL, .level_mask = 0}
-+};
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_fmt.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_fmt.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_fmt.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,399 @@
-+/*
-+ * Implements the routines which handle the format specific
-+ * aspects of dump for the default dump format.
-+ *
-+ * Used in single stage dumping and stage 1 of soft-boot based dumping
-+ * Saves data in LKCD (lcrash) format
-+ *
-+ * Previously a part of dump_base.c
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ * Split off and reshuffled LKCD dump format code around generic
-+ * dump method interfaces.
-+ *
-+ * Derived from original code created by
-+ * Matt Robinson <yakker@sourceforge.net>)
-+ *
-+ * Contributions from SGI, IBM, HP, MCL, and others.
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2000 - 2002 TurboLinux, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/time.h>
-+#include <linux/sched.h>
-+#include <linux/ptrace.h>
-+#include <linux/utsname.h>
-+#include <asm/dump.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+/*
-+ * SYSTEM DUMP LAYOUT
-+ *
-+ * System dumps are currently the combination of a dump header and a set
-+ * of data pages which contain the system memory. The layout of the dump
-+ * (for full dumps) is as follows:
-+ *
-+ * +-----------------------------+
-+ * | generic dump header |
-+ * +-----------------------------+
-+ * | architecture dump header |
-+ * +-----------------------------+
-+ * | page header |
-+ * +-----------------------------+
-+ * | page data |
-+ * +-----------------------------+
-+ * | page header |
-+ * +-----------------------------+
-+ * | page data |
-+ * +-----------------------------+
-+ * | | |
-+ * | | |
-+ * | | |
-+ * | | |
-+ * | V |
-+ * +-----------------------------+
-+ * | PAGE_END header |
-+ * +-----------------------------+
-+ *
-+ * There are two dump headers, the first which is architecture
-+ * independent, and the other which is architecture dependent. This
-+ * allows different architectures to dump different data structures
-+ * which are specific to their chipset, CPU, etc.
-+ *
-+ * After the dump headers come a succession of dump page headers along
-+ * with dump pages. The page header contains information about the page
-+ * size, any flags associated with the page (whether it's compressed or
-+ * not), and the address of the page. After the page header is the page
-+ * data, which is either compressed (or not). Each page of data is
-+ * dumped in succession, until the final dump header (PAGE_END) is
-+ * placed at the end of the dump, assuming the dump device isn't out
-+ * of space.
-+ *
-+ * This mechanism allows for multiple compression types, different
-+ * types of data structures, different page ordering, etc., etc., etc.
-+ * It's a very straightforward mechanism for dumping system memory.
-+ */
-+
-+struct __dump_header dump_header; /* the primary dump header */
-+struct __dump_header_asm dump_header_asm; /* the arch-specific dump header */
-+
-+/*
-+ * Set up common header fields (mainly the arch indep section)
-+ * Per-cpu state is handled by lcrash_save_context
-+ * Returns the size of the header in bytes.
-+ */
-+static int lcrash_init_dump_header(const char *panic_str)
-+{
-+ struct timeval dh_time;
-+ struct sysinfo info;
-+
-+ /* make sure the dump header isn't TOO big */
-+ if ((sizeof(struct __dump_header) +
-+ sizeof(struct __dump_header_asm)) > DUMP_BUFFER_SIZE) {
-+ printk("lcrash_init_header(): combined "
-+ "headers larger than DUMP_BUFFER_SIZE!\n");
-+ return -E2BIG;
-+ }
-+
-+ /* initialize the dump headers to zero */
-+ memset(&dump_header, 0, sizeof(dump_header));
-+ memset(&dump_header_asm, 0, sizeof(dump_header_asm));
-+
-+ /* configure dump header values */
-+ dump_header.dh_magic_number = DUMP_MAGIC_NUMBER;
-+ dump_header.dh_version = DUMP_VERSION_NUMBER;
-+ dump_header.dh_memory_start = PAGE_OFFSET;
-+ dump_header.dh_memory_end = DUMP_MAGIC_NUMBER;
-+ dump_header.dh_header_size = sizeof(struct __dump_header);
-+ si_meminfo(&info);
-+ dump_header.dh_memory_size = (u64)info.totalram;
-+ dump_header.dh_page_size = PAGE_SIZE;
-+ dump_header.dh_dump_level = dump_config.level;
-+ dump_header.dh_current_task = (unsigned long) current;
-+ dump_header.dh_dump_compress = dump_config.dumper->compress->
-+ compress_type;
-+ dump_header.dh_dump_flags = dump_config.flags;
-+ dump_header.dh_dump_device = dump_config.dumper->dev->device_id;
-+
-+#if DUMP_DEBUG >= 6
-+ dump_header.dh_num_bytes = 0;
-+#endif
-+ dump_header.dh_num_dump_pages = 0;
-+ do_gettimeofday(&dh_time);
-+ dump_header.dh_time.tv_sec = dh_time.tv_sec;
-+ dump_header.dh_time.tv_usec = dh_time.tv_usec;
-+
-+ memcpy((void *)&(dump_header.dh_utsname_sysname),
-+ (const void *)&(system_utsname.sysname), __NEW_UTS_LEN + 1);
-+ memcpy((void *)&(dump_header.dh_utsname_nodename),
-+ (const void *)&(system_utsname.nodename), __NEW_UTS_LEN + 1);
-+ memcpy((void *)&(dump_header.dh_utsname_release),
-+ (const void *)&(system_utsname.release), __NEW_UTS_LEN + 1);
-+ memcpy((void *)&(dump_header.dh_utsname_version),
-+ (const void *)&(system_utsname.version), __NEW_UTS_LEN + 1);
-+ memcpy((void *)&(dump_header.dh_utsname_machine),
-+ (const void *)&(system_utsname.machine), __NEW_UTS_LEN + 1);
-+ memcpy((void *)&(dump_header.dh_utsname_domainname),
-+ (const void *)&(system_utsname.domainname), __NEW_UTS_LEN + 1);
-+
-+ if (panic_str) {
-+ memcpy((void *)&(dump_header.dh_panic_string),
-+ (const void *)panic_str, DUMP_PANIC_LEN);
-+ }
-+
-+ dump_header_asm.dha_magic_number = DUMP_ASM_MAGIC_NUMBER;
-+ dump_header_asm.dha_version = DUMP_ASM_VERSION_NUMBER;
-+ dump_header_asm.dha_header_size = sizeof(dump_header_asm);
-+
-+ dump_header_asm.dha_smp_num_cpus = num_online_cpus();
-+ pr_debug("smp_num_cpus in header %d\n",
-+ dump_header_asm.dha_smp_num_cpus);
-+
-+ dump_header_asm.dha_dumping_cpu = smp_processor_id();
-+
-+ return sizeof(dump_header) + sizeof(dump_header_asm);
-+}
-+
-+
-+int dump_lcrash_configure_header(const char *panic_str,
-+ const struct pt_regs *regs)
-+{
-+ int retval = 0;
-+
-+ dump_config.dumper->header_len = lcrash_init_dump_header(panic_str);
-+
-+ /* capture register states for all processors */
-+ dump_save_this_cpu(regs);
-+ __dump_save_other_cpus(); /* side effect:silence cpus */
-+
-+ /* configure architecture-specific dump header values */
-+ if ((retval = __dump_configure_header(regs)))
-+ return retval;
-+
-+ dump_config.dumper->header_dirty++;
-+ return 0;
-+}
-+
-+/* save register and task context */
-+void dump_lcrash_save_context(int cpu, const struct pt_regs *regs,
-+ struct task_struct *tsk)
-+{
-+ dump_header_asm.dha_smp_current_task[cpu] = (uint32_t) tsk;
-+
-+ __dump_save_regs(&dump_header_asm.dha_smp_regs[cpu], regs);
-+
-+ /* take a snapshot of the stack */
-+ /* doing this enables us to tolerate slight drifts on this cpu */
-+ if (dump_header_asm.dha_stack[cpu]) {
-+ memcpy((void *)dump_header_asm.dha_stack[cpu],
-+ tsk->thread_info, THREAD_SIZE);
-+ }
-+ dump_header_asm.dha_stack_ptr[cpu] = (uint32_t)(tsk->thread_info);
-+}
-+
-+/* write out the header */
-+int dump_write_header(void)
-+{
-+ int retval = 0, size;
-+ void *buf = dump_config.dumper->dump_buf;
-+
-+ /* accounts for DUMP_HEADER_OFFSET if applicable */
-+ if ((retval = dump_dev_seek(0))) {
-+ printk("Unable to seek to dump header offset: %d\n",
-+ retval);
-+ return retval;
-+ }
-+
-+ memcpy(buf, (void *)&dump_header, sizeof(dump_header));
-+ size = sizeof(dump_header);
-+ memcpy(buf + size, (void *)&dump_header_asm, sizeof(dump_header_asm));
-+ size += sizeof(dump_header_asm);
-+ size = PAGE_ALIGN(size);
-+ retval = dump_ll_write(buf , size);
-+
-+ if (retval < size)
-+ return (retval >= 0) ? ENOSPC : retval;
-+
-+ return 0;
-+}
-+
-+int dump_generic_update_header(void)
-+{
-+ int err = 0;
-+
-+ if (dump_config.dumper->header_dirty) {
-+ if ((err = dump_write_header())) {
-+ printk("dump write header failed !err %d\n", err);
-+ } else {
-+ dump_config.dumper->header_dirty = 0;
-+ }
-+ }
-+
-+ return err;
-+}
-+
-+static inline int is_curr_stack_page(struct page *page, unsigned long size)
-+{
-+ unsigned long thread_addr = (unsigned long)current_thread_info();
-+ unsigned long addr = (unsigned long)page_address(page);
-+
-+ return !PageHighMem(page) && (addr < thread_addr + THREAD_SIZE)
-+ && (addr + size > thread_addr);
-+}
-+
-+static inline int is_dump_page(struct page *page, unsigned long size)
-+{
-+ unsigned long addr = (unsigned long)page_address(page);
-+ unsigned long dump_buf = (unsigned long)dump_config.dumper->dump_buf;
-+
-+ return !PageHighMem(page) && (addr < dump_buf + DUMP_BUFFER_SIZE)
-+ && (addr + size > dump_buf);
-+}
-+
-+int dump_allow_compress(struct page *page, unsigned long size)
-+{
-+ /*
-+ * Don't compress the page if any part of it overlaps
-+ * with the current stack or dump buffer (since the contents
-+ * in these could be changing while compression is going on)
-+ */
-+ return !is_curr_stack_page(page, size) && !is_dump_page(page, size);
-+}
-+
-+void lcrash_init_pageheader(struct __dump_page *dp, struct page *page,
-+ unsigned long sz)
-+{
-+ memset(dp, sizeof(struct __dump_page), 0);
-+ dp->dp_flags = 0;
-+ dp->dp_size = 0;
-+ if (sz > 0)
-+ dp->dp_address = page_to_pfn(page) << PAGE_SHIFT;
-+
-+#if DUMP_DEBUG > 6
-+ dp->dp_page_index = dump_header.dh_num_dump_pages;
-+ dp->dp_byte_offset = dump_header.dh_num_bytes + DUMP_BUFFER_SIZE
-+ + DUMP_HEADER_OFFSET; /* ?? */
-+#endif /* DUMP_DEBUG */
-+}
-+
-+int dump_lcrash_add_data(unsigned long loc, unsigned long len)
-+{
-+ struct page *page = (struct page *)loc;
-+ void *addr, *buf = dump_config.dumper->curr_buf;
-+ struct __dump_page *dp = (struct __dump_page *)buf;
-+ int bytes, size;
-+
-+ if (buf > dump_config.dumper->dump_buf + DUMP_BUFFER_SIZE)
-+ return -ENOMEM;
-+
-+ lcrash_init_pageheader(dp, page, len);
-+ buf += sizeof(struct __dump_page);
-+
-+ while (len) {
-+ addr = kmap_atomic(page, KM_DUMP);
-+ size = bytes = (len > PAGE_SIZE) ? PAGE_SIZE : len;
-+ /* check for compression */
-+ if (dump_allow_compress(page, bytes)) {
-+ size = dump_compress_data((char *)addr, bytes, (char *)buf);
-+ }
-+ /* set the compressed flag if the page did compress */
-+ if (size && (size < bytes)) {
-+ dp->dp_flags |= DUMP_DH_COMPRESSED;
-+ } else {
-+ /* compression failed -- default to raw mode */
-+ dp->dp_flags |= DUMP_DH_RAW;
-+ memcpy(buf, addr, bytes);
-+ size = bytes;
-+ }
-+ /* memset(buf, 'A', size); temporary: testing only !! */
-+ kunmap_atomic(addr, KM_DUMP);
-+ dp->dp_size += size;
-+ buf += size;
-+ len -= bytes;
-+ page++;
-+ }
-+
-+ /* now update the header */
-+#if DUMP_DEBUG > 6
-+ dump_header.dh_num_bytes += dp->dp_size + sizeof(*dp);
-+#endif
-+ dump_header.dh_num_dump_pages++;
-+ dump_config.dumper->header_dirty++;
-+
-+ dump_config.dumper->curr_buf = buf;
-+
-+ return len;
-+}
-+
-+int dump_lcrash_update_end_marker(void)
-+{
-+ struct __dump_page *dp =
-+ (struct __dump_page *)dump_config.dumper->curr_buf;
-+ unsigned long left;
-+ int ret = 0;
-+
-+ lcrash_init_pageheader(dp, NULL, 0);
-+ dp->dp_flags |= DUMP_DH_END; /* tbd: truncation test ? */
-+
-+ /* now update the header */
-+#if DUMP_DEBUG > 6
-+ dump_header.dh_num_bytes += sizeof(*dp);
-+#endif
-+ dump_config.dumper->curr_buf += sizeof(*dp);
-+ left = dump_config.dumper->curr_buf - dump_config.dumper->dump_buf;
-+
-+ printk("\n");
-+
-+ while (left) {
-+ if ((ret = dump_dev_seek(dump_config.dumper->curr_offset))) {
-+ printk("Seek failed at offset 0x%llx\n",
-+ dump_config.dumper->curr_offset);
-+ return ret;
-+ }
-+
-+ if (DUMP_BUFFER_SIZE > left)
-+ memset(dump_config.dumper->curr_buf, 'm',
-+ DUMP_BUFFER_SIZE - left);
-+
-+ if ((ret = dump_ll_write(dump_config.dumper->dump_buf,
-+ DUMP_BUFFER_SIZE)) < DUMP_BUFFER_SIZE) {
-+ return (ret < 0) ? ret : -ENOSPC;
-+ }
-+
-+ dump_config.dumper->curr_offset += DUMP_BUFFER_SIZE;
-+
-+ if (left > DUMP_BUFFER_SIZE) {
-+ left -= DUMP_BUFFER_SIZE;
-+ memcpy(dump_config.dumper->dump_buf,
-+ dump_config.dumper->dump_buf + DUMP_BUFFER_SIZE, left);
-+ dump_config.dumper->curr_buf -= DUMP_BUFFER_SIZE;
-+ } else {
-+ left = 0;
-+ }
-+ }
-+ return 0;
-+}
-+
-+
-+/* Default Formatter (lcrash) */
-+struct dump_fmt_ops dump_fmt_lcrash_ops = {
-+ .configure_header = dump_lcrash_configure_header,
-+ .update_header = dump_generic_update_header,
-+ .save_context = dump_lcrash_save_context,
-+ .add_data = dump_lcrash_add_data,
-+ .update_end_marker = dump_lcrash_update_end_marker
-+};
-+
-+struct dump_fmt dump_fmt_lcrash = {
-+ .name = "lcrash",
-+ .ops = &dump_fmt_lcrash_ops
-+};
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_gzip.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_gzip.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_gzip.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,118 @@
-+/*
-+ * GZIP Compression functions for kernel crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sourceforge.net)
-+ * Copyright 2001 Matt D. Robinson. All rights reserved.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/* header files */
-+#include <linux/config.h>
-+#include <linux/module.h>
-+#include <linux/sched.h>
-+#include <linux/fs.h>
-+#include <linux/file.h>
-+#include <linux/init.h>
-+#include <linux/slab.h>
-+#include <linux/dump.h>
-+#include <linux/zlib.h>
-+#include <linux/vmalloc.h>
-+
-+static void *deflate_workspace;
-+
-+/*
-+ * Name: dump_compress_gzip()
-+ * Func: Compress a DUMP_PAGE_SIZE page using gzip-style algorithms (the.
-+ * deflate functions similar to what's used in PPP).
-+ */
-+static u16
-+dump_compress_gzip(const u8 *old, u16 oldsize, u8 *new, u16 newsize)
-+{
-+ /* error code and dump stream */
-+ int err;
-+ z_stream dump_stream;
-+
-+ dump_stream.workspace = deflate_workspace;
-+
-+ if ((err = zlib_deflateInit(&dump_stream, Z_BEST_COMPRESSION)) != Z_OK) {
-+ /* fall back to RLE compression */
-+ printk("dump_compress_gzip(): zlib_deflateInit() "
-+ "failed (%d)!\n", err);
-+ return 0;
-+ }
-+
-+ /* use old (page of memory) and size (DUMP_PAGE_SIZE) as in-streams */
-+ dump_stream.next_in = (u8 *) old;
-+ dump_stream.avail_in = oldsize;
-+
-+ /* out streams are new (dpcpage) and new size (DUMP_DPC_PAGE_SIZE) */
-+ dump_stream.next_out = new;
-+ dump_stream.avail_out = newsize;
-+
-+ /* deflate the page -- check for error */
-+ err = zlib_deflate(&dump_stream, Z_FINISH);
-+ if (err != Z_STREAM_END) {
-+ /* zero is return code here */
-+ (void)zlib_deflateEnd(&dump_stream);
-+ printk("dump_compress_gzip(): zlib_deflate() failed (%d)!\n",
-+ err);
-+ return 0;
-+ }
-+
-+ /* let's end the deflated compression stream */
-+ if ((err = zlib_deflateEnd(&dump_stream)) != Z_OK) {
-+ printk("dump_compress_gzip(): zlib_deflateEnd() "
-+ "failed (%d)!\n", err);
-+ }
-+
-+ /* return the compressed byte total (if it's smaller) */
-+ if (dump_stream.total_out >= oldsize) {
-+ return oldsize;
-+ }
-+ return dump_stream.total_out;
-+}
-+
-+/* setup the gzip compression functionality */
-+static struct __dump_compress dump_gzip_compression = {
-+ .compress_type = DUMP_COMPRESS_GZIP,
-+ .compress_func = dump_compress_gzip,
-+ .compress_name = "GZIP",
-+};
-+
-+/*
-+ * Name: dump_compress_gzip_init()
-+ * Func: Initialize gzip as a compression mechanism.
-+ */
-+static int __init
-+dump_compress_gzip_init(void)
-+{
-+ deflate_workspace = vmalloc(zlib_deflate_workspacesize());
-+ if (!deflate_workspace) {
-+ printk("dump_compress_gzip_init(): Failed to "
-+ "alloc %d bytes for deflate workspace\n",
-+ zlib_deflate_workspacesize());
-+ return -ENOMEM;
-+ }
-+ dump_register_compression(&dump_gzip_compression);
-+ return 0;
-+}
-+
-+/*
-+ * Name: dump_compress_gzip_cleanup()
-+ * Func: Remove gzip as a compression mechanism.
-+ */
-+static void __exit
-+dump_compress_gzip_cleanup(void)
-+{
-+ vfree(deflate_workspace);
-+ dump_unregister_compression(DUMP_COMPRESS_GZIP);
-+}
-+
-+/* module initialization */
-+module_init(dump_compress_gzip_init);
-+module_exit(dump_compress_gzip_cleanup);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("LKCD Development Team <lkcd-devel@lists.sourceforge.net>");
-+MODULE_DESCRIPTION("Gzip compression module for crash dump driver");
-Index: linux-2.6.0-test5/drivers/dump/dump_i386.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_i386.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_i386.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,329 @@
-+/*
-+ * Architecture specific (i386) functions for Linux crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sgi.com)
-+ *
-+ * Copyright 1999 Silicon Graphics, Inc. All rights reserved.
-+ *
-+ * 2.3 kernel modifications by: Matt D. Robinson (yakker@turbolinux.com)
-+ * Copyright 2000 TurboLinux, Inc. All rights reserved.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/*
-+ * The hooks for dumping the kernel virtual memory to disk are in this
-+ * file. Any time a modification is made to the virtual memory mechanism,
-+ * these routines must be changed to use the new mechanisms.
-+ */
-+#include <linux/init.h>
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/smp.h>
-+#include <linux/fs.h>
-+#include <linux/vmalloc.h>
-+#include <linux/mm.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+#include <linux/irq.h>
-+
-+#include <asm/processor.h>
-+#include <asm/e820.h>
-+#include <asm/hardirq.h>
-+#include <asm/nmi.h>
-+
-+static __s32 saved_irq_count; /* saved preempt_count() flags */
-+
-+static int
-+alloc_dha_stack(void)
-+{
-+ int i;
-+ void *ptr;
-+
-+ if (dump_header_asm.dha_stack[0])
-+ return 0;
-+
-+ ptr = vmalloc(THREAD_SIZE * num_online_cpus());
-+ if (!ptr) {
-+ printk("vmalloc for dha_stacks failed\n");
-+ return -ENOMEM;
-+ }
-+
-+ for (i = 0; i < num_online_cpus(); i++) {
-+ dump_header_asm.dha_stack[i] = (u32)((unsigned long)ptr +
-+ (i * THREAD_SIZE));
-+ }
-+ return 0;
-+}
-+
-+static int
-+free_dha_stack(void)
-+{
-+ if (dump_header_asm.dha_stack[0]) {
-+ vfree((void *)dump_header_asm.dha_stack[0]);
-+ dump_header_asm.dha_stack[0] = 0;
-+ }
-+ return 0;
-+}
-+
-+
-+void
-+__dump_save_regs(struct pt_regs *dest_regs, const struct pt_regs *regs)
-+{
-+ *dest_regs = *regs;
-+
-+ /* In case of panic dumps, we collects regs on entry to panic.
-+ * so, we shouldn't 'fix' ssesp here again. But it is hard to
-+ * tell just looking at regs whether ssesp need fixing. We make
-+ * this decision by looking at xss in regs. If we have better
-+ * means to determine that ssesp are valid (by some flag which
-+ * tells that we are here due to panic dump), then we can use
-+ * that instead of this kludge.
-+ */
-+ if (!user_mode(regs)) {
-+ if ((0xffff & regs->xss) == __KERNEL_DS)
-+ /* already fixed up */
-+ return;
-+ dest_regs->esp = (unsigned long)&(regs->esp);
-+ __asm__ __volatile__ ("movw %%ss, %%ax;"
-+ :"=a"(dest_regs->xss));
-+ }
-+}
-+
-+
-+#ifdef CONFIG_SMP
-+extern cpumask_t irq_affinity[];
-+extern irq_desc_t irq_desc[];
-+extern void dump_send_ipi(void);
-+
-+static int dump_expect_ipi[NR_CPUS];
-+static atomic_t waiting_for_dump_ipi;
-+static cpumask_t saved_affinity[NR_IRQS];
-+
-+extern void stop_this_cpu(void *); /* exported by i386 kernel */
-+
-+static int
-+dump_nmi_callback(struct pt_regs *regs, int cpu)
-+{
-+ if (!dump_expect_ipi[cpu])
-+ return 0;
-+
-+ dump_expect_ipi[cpu] = 0;
-+
-+ dump_save_this_cpu(regs);
-+ atomic_dec(&waiting_for_dump_ipi);
-+
-+ level_changed:
-+ switch (dump_silence_level) {
-+ case DUMP_HARD_SPIN_CPUS: /* Spin until dump is complete */
-+ while (dump_oncpu) {
-+ barrier(); /* paranoia */
-+ if (dump_silence_level != DUMP_HARD_SPIN_CPUS)
-+ goto level_changed;
-+
-+ cpu_relax(); /* kill time nicely */
-+ }
-+ break;
-+
-+ case DUMP_HALT_CPUS: /* Execute halt */
-+ stop_this_cpu(NULL);
-+ break;
-+
-+ case DUMP_SOFT_SPIN_CPUS:
-+ /* Mark the task so it spins in schedule */
-+ set_tsk_thread_flag(current, TIF_NEED_RESCHED);
-+ break;
-+ }
-+
-+ return 1;
-+}
-+
-+/* save registers on other processors */
-+void
-+__dump_save_other_cpus(void)
-+{
-+ int i, cpu = smp_processor_id();
-+ int other_cpus = num_online_cpus()-1;
-+
-+ if (other_cpus > 0) {
-+ atomic_set(&waiting_for_dump_ipi, other_cpus);
-+
-+ for (i = 0; i < NR_CPUS; i++) {
-+ dump_expect_ipi[i] = (i != cpu && cpu_online(i));
-+ }
-+
-+ /* short circuit normal NMI handling temporarily */
-+ set_nmi_callback(dump_nmi_callback);
-+ wmb();
-+
-+ dump_send_ipi();
-+ /* may be we dont need to wait for NMI to be processed.
-+ just write out the header at the end of dumping, if
-+ this IPI is not processed until then, there probably
-+ is a problem and we just fail to capture state of
-+ other cpus. */
-+ while(atomic_read(&waiting_for_dump_ipi) > 0) {
-+ cpu_relax();
-+ }
-+
-+ unset_nmi_callback();
-+ }
-+}
-+
-+/*
-+ * Routine to save the old irq affinities and change affinities of all irqs to
-+ * the dumping cpu.
-+ */
-+static void
-+set_irq_affinity(void)
-+{
-+ int i;
-+ int cpu = smp_processor_id();
-+
-+ memcpy(saved_affinity, irq_affinity, NR_IRQS * sizeof(cpumask_t));
-+ for (i = 0; i < NR_IRQS; i++) {
-+ if (irq_desc[i].handler == NULL)
-+ continue;
-+ irq_affinity[i] = cpumask_of_cpu(cpu);
-+ if (irq_desc[i].handler->set_affinity != NULL)
-+ irq_desc[i].handler->set_affinity(i, irq_affinity[i]);
-+ }
-+}
-+
-+/*
-+ * Restore old irq affinities.
-+ */
-+static void
-+reset_irq_affinity(void)
-+{
-+ int i;
-+
-+ memcpy(irq_affinity, saved_affinity, NR_IRQS * sizeof(unsigned long));
-+ for (i = 0; i < NR_IRQS; i++) {
-+ if (irq_desc[i].handler == NULL)
-+ continue;
-+ if (irq_desc[i].handler->set_affinity != NULL)
-+ irq_desc[i].handler->set_affinity(i, saved_affinity[i]);
-+ }
-+}
-+
-+#else /* !CONFIG_SMP */
-+#define set_irq_affinity() do { } while (0)
-+#define reset_irq_affinity() do { } while (0)
-+#define save_other_cpu_states() do { } while (0)
-+#endif /* !CONFIG_SMP */
-+
-+/*
-+ * Kludge - dump from interrupt context is unreliable (Fixme)
-+ *
-+ * We do this so that softirqs initiated for dump i/o
-+ * get processed and we don't hang while waiting for i/o
-+ * to complete or in any irq synchronization attempt.
-+ *
-+ * This is not quite legal of course, as it has the side
-+ * effect of making all interrupts & softirqs triggered
-+ * while dump is in progress complete before currently
-+ * pending softirqs and the currently executing interrupt
-+ * code.
-+ */
-+static inline void
-+irq_bh_save(void)
-+{
-+ saved_irq_count = irq_count();
-+ preempt_count() &= ~(HARDIRQ_MASK|SOFTIRQ_MASK);
-+}
-+
-+static inline void
-+irq_bh_restore(void)
-+{
-+ preempt_count() |= saved_irq_count;
-+}
-+
-+/*
-+ * Name: __dump_irq_enable
-+ * Func: Reset system so interrupts are enabled.
-+ * This is used for dump methods that require interrupts
-+ * Eventually, all methods will have interrupts disabled
-+ * and this code can be removed.
-+ *
-+ * Change irq affinities
-+ * Re-enable interrupts
-+ */
-+void
-+__dump_irq_enable(void)
-+{
-+ set_irq_affinity();
-+ irq_bh_save();
-+ local_irq_enable();
-+}
-+
-+/*
-+ * Name: __dump_irq_restore
-+ * Func: Resume the system state in an architecture-specific way.
-+
-+ */
-+void
-+__dump_irq_restore(void)
-+{
-+ local_irq_disable();
-+ reset_irq_affinity();
-+ irq_bh_restore();
-+}
-+
-+/*
-+ * Name: __dump_configure_header()
-+ * Func: Meant to fill in arch specific header fields except per-cpu state
-+ * already captured via __dump_save_context for all CPUs.
-+ */
-+int
-+__dump_configure_header(const struct pt_regs *regs)
-+{
-+ return (0);
-+}
-+
-+/*
-+ * Name: __dump_init()
-+ * Func: Initialize the dumping routine process.
-+ */
-+void
-+__dump_init(uint64_t local_memory_start)
-+{
-+ return;
-+}
-+
-+/*
-+ * Name: __dump_open()
-+ * Func: Open the dump device (architecture specific).
-+ */
-+void
-+__dump_open(void)
-+{
-+ alloc_dha_stack();
-+}
-+
-+/*
-+ * Name: __dump_cleanup()
-+ * Func: Free any architecture specific data structures. This is called
-+ * when the dump module is being removed.
-+ */
-+void
-+__dump_cleanup(void)
-+{
-+ free_dha_stack();
-+}
-+
-+extern int pfn_is_ram(unsigned long);
-+
-+/*
-+ * Name: __dump_page_valid()
-+ * Func: Check if page is valid to dump.
-+ */
-+int
-+__dump_page_valid(unsigned long index)
-+{
-+ if (!pfn_valid(index))
-+ return 0;
-+
-+ return pfn_is_ram(index);
-+}
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_memdev.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_memdev.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_memdev.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,640 @@
-+/*
-+ * Implements the dump driver interface for saving a dump in available
-+ * memory areas. The saved pages may be written out to persistent storage
-+ * after a soft reboot.
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ *
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ *
-+ * The approach of tracking pages containing saved dump using map pages
-+ * allocated as needed has been derived from the Mission Critical Linux
-+ * mcore dump implementation.
-+ *
-+ * Credits and a big thanks for letting the lkcd project make use of
-+ * the excellent piece of work and also helping with clarifications
-+ * and tips along the way are due to:
-+ * Dave Winchell <winchell@mclx.com> (primary author of mcore)
-+ * Jeff Moyer <moyer@mclx.com>
-+ * Josh Huber <huber@mclx.com>
-+ *
-+ * For those familiar with the mcore code, the main differences worth
-+ * noting here (besides the dump device abstraction) result from enabling
-+ * "high" memory pages (pages not permanently mapped in the kernel
-+ * address space) to be used for saving dump data (because of which a
-+ * simple virtual address based linked list cannot be used anymore for
-+ * managing free pages), an added level of indirection for faster
-+ * lookups during the post-boot stage, and the idea of pages being
-+ * made available as they get freed up while dump to memory progresses
-+ * rather than one time before starting the dump. The last point enables
-+ * a full memory snapshot to be saved starting with an initial set of
-+ * bootstrap pages given a good compression ratio. (See dump_overlay.c)
-+ *
-+ */
-+
-+/*
-+ * -----------------MEMORY LAYOUT ------------------
-+ * The memory space consists of a set of discontiguous pages, and
-+ * discontiguous map pages as well, rooted in a chain of indirect
-+ * map pages (also discontiguous). Except for the indirect maps
-+ * (which must be preallocated in advance), the rest of the pages
-+ * could be in high memory.
-+ *
-+ * root
-+ * | --------- -------- --------
-+ * --> | . . +|--->| . +|------->| . . | indirect
-+ * --|--|--- ---|---- --|-|--- maps
-+ * | | | | |
-+ * ------ ------ ------- ------ -------
-+ * | . | | . | | . . | | . | | . . | maps
-+ * --|--- --|--- --|--|-- --|--- ---|-|--
-+ * page page page page page page page data
-+ * pages
-+ *
-+ * Writes to the dump device happen sequentially in append mode.
-+ * The main reason for the existence of the indirect map is
-+ * to enable a quick way to lookup a specific logical offset in
-+ * the saved data post-soft-boot, e.g. to writeout pages
-+ * with more critical data first, even though such pages
-+ * would have been compressed and copied last, being the lowest
-+ * ranked candidates for reuse due to their criticality.
-+ * (See dump_overlay.c)
-+ */
-+#include <linux/mm.h>
-+#include <linux/highmem.h>
-+#include <linux/bootmem.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+#define DUMP_MAP_SZ (PAGE_SIZE / sizeof(unsigned long)) /* direct map size */
-+#define DUMP_IND_MAP_SZ DUMP_MAP_SZ - 1 /* indirect map size */
-+#define DUMP_NR_BOOTSTRAP 64 /* no of bootstrap pages */
-+
-+extern int dump_low_page(struct page *);
-+
-+/* check if the next entry crosses a page boundary */
-+static inline int is_last_map_entry(unsigned long *map)
-+{
-+ unsigned long addr = (unsigned long)(map + 1);
-+
-+ return (!(addr & (PAGE_SIZE - 1)));
-+}
-+
-+/* Todo: should have some validation checks */
-+/* The last entry in the indirect map points to the next indirect map */
-+/* Indirect maps are referred to directly by virtual address */
-+static inline unsigned long *next_indirect_map(unsigned long *map)
-+{
-+ return (unsigned long *)map[DUMP_IND_MAP_SZ];
-+}
-+
-+#ifdef CONFIG_CRASH_DUMP_SOFTBOOT
-+/* Called during early bootup - fixme: make this __init */
-+void dump_early_reserve_map(struct dump_memdev *dev)
-+{
-+ unsigned long *map1, *map2;
-+ loff_t off = 0, last = dev->last_used_offset >> PAGE_SHIFT;
-+ int i, j;
-+
-+ printk("Reserve bootmap space holding previous dump of %lld pages\n",
-+ last);
-+ map1= (unsigned long *)dev->indirect_map_root;
-+
-+ while (map1 && (off < last)) {
-+ reserve_bootmem(virt_to_phys((void *)map1), PAGE_SIZE);
-+ for (i=0; (i < DUMP_MAP_SZ - 1) && map1[i] && (off < last);
-+ i++, off += DUMP_MAP_SZ) {
-+ pr_debug("indirect map[%d] = 0x%lx\n", i, map1[i]);
-+ if (map1[i] >= max_low_pfn)
-+ continue;
-+ reserve_bootmem(map1[i] << PAGE_SHIFT, PAGE_SIZE);
-+ map2 = pfn_to_kaddr(map1[i]);
-+ for (j = 0 ; (j < DUMP_MAP_SZ) && map2[j] &&
-+ (off + j < last); j++) {
-+ pr_debug("\t map[%d][%d] = 0x%lx\n", i, j,
-+ map2[j]);
-+ if (map2[j] < max_low_pfn) {
-+ reserve_bootmem(map2[j] << PAGE_SHIFT,
-+ PAGE_SIZE);
-+ }
-+ }
-+ }
-+ map1 = next_indirect_map(map1);
-+ }
-+ dev->nr_free = 0; /* these pages don't belong to this boot */
-+}
-+#endif
-+
-+/* mark dump pages so that they aren't used by this kernel */
-+void dump_mark_map(struct dump_memdev *dev)
-+{
-+ unsigned long *map1, *map2;
-+ loff_t off = 0, last = dev->last_used_offset >> PAGE_SHIFT;
-+ struct page *page;
-+ int i, j;
-+
-+ printk("Dump: marking pages in use by previous dump\n");
-+ map1= (unsigned long *)dev->indirect_map_root;
-+
-+ while (map1 && (off < last)) {
-+ page = virt_to_page(map1);
-+ set_page_count(page, 1);
-+ for (i=0; (i < DUMP_MAP_SZ - 1) && map1[i] && (off < last);
-+ i++, off += DUMP_MAP_SZ) {
-+ pr_debug("indirect map[%d] = 0x%lx\n", i, map1[i]);
-+ page = pfn_to_page(map1[i]);
-+ set_page_count(page, 1);
-+ map2 = kmap_atomic(page, KM_DUMP);
-+ for (j = 0 ; (j < DUMP_MAP_SZ) && map2[j] &&
-+ (off + j < last); j++) {
-+ pr_debug("\t map[%d][%d] = 0x%lx\n", i, j,
-+ map2[j]);
-+ page = pfn_to_page(map2[j]);
-+ set_page_count(page, 1);
-+ }
-+ }
-+ map1 = next_indirect_map(map1);
-+ }
-+}
-+
-+
-+/*
-+ * Given a logical offset into the mem device lookup the
-+ * corresponding page
-+ * loc is specified in units of pages
-+ * Note: affects curr_map (even in the case where lookup fails)
-+ */
-+struct page *dump_mem_lookup(struct dump_memdev *dump_mdev, unsigned long loc)
-+{
-+ unsigned long *map;
-+ unsigned long i, index = loc / DUMP_MAP_SZ;
-+ struct page *page = NULL;
-+ unsigned long curr_pfn, curr_map, *curr_map_ptr = NULL;
-+
-+ map = (unsigned long *)dump_mdev->indirect_map_root;
-+ if (!map)
-+ return NULL;
-+
-+ if (loc > dump_mdev->last_offset >> PAGE_SHIFT)
-+ return NULL;
-+
-+ /*
-+ * first locate the right indirect map
-+ * in the chain of indirect maps
-+ */
-+ for (i = 0; i + DUMP_IND_MAP_SZ < index ; i += DUMP_IND_MAP_SZ) {
-+ if (!(map = next_indirect_map(map)))
-+ return NULL;
-+ }
-+ /* then the right direct map */
-+ /* map entries are referred to by page index */
-+ if ((curr_map = map[index - i])) {
-+ page = pfn_to_page(curr_map);
-+ /* update the current traversal index */
-+ /* dump_mdev->curr_map = &map[index - i];*/
-+ curr_map_ptr = &map[index - i];
-+ }
-+
-+ if (page)
-+ map = kmap_atomic(page, KM_DUMP);
-+ else
-+ return NULL;
-+
-+ /* and finally the right entry therein */
-+ /* data pages are referred to by page index */
-+ i = index * DUMP_MAP_SZ;
-+ if ((curr_pfn = map[loc - i])) {
-+ page = pfn_to_page(curr_pfn);
-+ dump_mdev->curr_map = curr_map_ptr;
-+ dump_mdev->curr_map_offset = loc - i;
-+ dump_mdev->ddev.curr_offset = loc << PAGE_SHIFT;
-+ } else {
-+ page = NULL;
-+ }
-+ kunmap_atomic(map, KM_DUMP);
-+
-+ return page;
-+}
-+
-+/*
-+ * Retrieves a pointer to the next page in the dump device
-+ * Used during the lookup pass post-soft-reboot
-+ */
-+struct page *dump_mem_next_page(struct dump_memdev *dev)
-+{
-+ unsigned long i;
-+ unsigned long *map;
-+ struct page *page = NULL;
-+
-+ if (dev->ddev.curr_offset + PAGE_SIZE >= dev->last_offset) {
-+ return NULL;
-+ }
-+
-+ if ((i = (unsigned long)(++dev->curr_map_offset)) >= DUMP_MAP_SZ) {
-+ /* move to next map */
-+ if (is_last_map_entry(++dev->curr_map)) {
-+ /* move to the next indirect map page */
-+ printk("dump_mem_next_page: go to next indirect map\n");
-+ dev->curr_map = (unsigned long *)*dev->curr_map;
-+ if (!dev->curr_map)
-+ return NULL;
-+ }
-+ i = dev->curr_map_offset = 0;
-+ pr_debug("dump_mem_next_page: next map 0x%lx, entry 0x%lx\n",
-+ dev->curr_map, *dev->curr_map);
-+
-+ };
-+
-+ if (*dev->curr_map) {
-+ map = kmap_atomic(pfn_to_page(*dev->curr_map), KM_DUMP);
-+ if (map[i])
-+ page = pfn_to_page(map[i]);
-+ kunmap_atomic(map, KM_DUMP);
-+ dev->ddev.curr_offset += PAGE_SIZE;
-+ };
-+
-+ return page;
-+}
-+
-+/* Copied from dump_filters.c */
-+static inline int kernel_page(struct page *p)
-+{
-+ /* FIXME: Need to exclude hugetlb pages. Clue: reserved but inuse */
-+ return PageReserved(p) || (!PageLRU(p) && PageInuse(p));
-+}
-+
-+static inline int user_page(struct page *p)
-+{
-+ return PageInuse(p) && (!PageReserved(p) && PageLRU(p));
-+}
-+
-+int dump_reused_by_boot(struct page *page)
-+{
-+ /* Todo
-+ * Checks:
-+ * if PageReserved
-+ * if < __end + bootmem_bootmap_pages for this boot + allowance
-+ * if overwritten by initrd (how to check ?)
-+ * Also, add more checks in early boot code
-+ * e.g. bootmem bootmap alloc verify not overwriting dump, and if
-+ * so then realloc or move the dump pages out accordingly.
-+ */
-+
-+ /* Temporary proof of concept hack, avoid overwriting kern pages */
-+
-+ return (kernel_page(page) || dump_low_page(page) || user_page(page));
-+}
-+
-+
-+/* Uses the free page passed in to expand available space */
-+int dump_mem_add_space(struct dump_memdev *dev, struct page *page)
-+{
-+ struct page *map_page;
-+ unsigned long *map;
-+ unsigned long i;
-+
-+ if (!dev->curr_map)
-+ return -ENOMEM; /* must've exhausted indirect map */
-+
-+ if (!*dev->curr_map || dev->curr_map_offset >= DUMP_MAP_SZ) {
-+ /* add map space */
-+ *dev->curr_map = page_to_pfn(page);
-+ dev->curr_map_offset = 0;
-+ return 0;
-+ }
-+
-+ /* add data space */
-+ i = dev->curr_map_offset;
-+ map_page = pfn_to_page(*dev->curr_map);
-+ map = (unsigned long *)kmap_atomic(map_page, KM_DUMP);
-+ map[i] = page_to_pfn(page);
-+ kunmap_atomic(map, KM_DUMP);
-+ dev->curr_map_offset = ++i;
-+ dev->last_offset += PAGE_SIZE;
-+ if (i >= DUMP_MAP_SZ) {
-+ /* move to next map */
-+ if (is_last_map_entry(++dev->curr_map)) {
-+ /* move to the next indirect map page */
-+ pr_debug("dump_mem_add_space: using next"
-+ "indirect map\n");
-+ dev->curr_map = (unsigned long *)*dev->curr_map;
-+ }
-+ }
-+ return 0;
-+}
-+
-+
-+/* Caution: making a dest page invalidates existing contents of the page */
-+int dump_check_and_free_page(struct dump_memdev *dev, struct page *page)
-+{
-+ int err = 0;
-+
-+ /*
-+ * the page can be used as a destination only if we are sure
-+ * it won't get overwritten by the soft-boot, and is not
-+ * critical for us right now.
-+ */
-+ if (dump_reused_by_boot(page))
-+ return 0;
-+
-+ if ((err = dump_mem_add_space(dev, page))) {
-+ printk("Warning: Unable to extend memdev space. Err %d\n",
-+ err);
-+ return 0;
-+ }
-+
-+ dev->nr_free++;
-+ return 1;
-+}
-+
-+
-+/* Set up the initial maps and bootstrap space */
-+/* Must be called only after any previous dump is written out */
-+int dump_mem_open(struct dump_dev *dev, unsigned long devid)
-+{
-+ struct dump_memdev *dump_mdev = DUMP_MDEV(dev);
-+ unsigned long nr_maps, *map, *prev_map = &dump_mdev->indirect_map_root;
-+ void *addr;
-+ struct page *page;
-+ unsigned long i = 0;
-+ int err = 0;
-+
-+ /* Todo: sanity check for unwritten previous dump */
-+
-+ /* allocate pages for indirect map (non highmem area) */
-+ nr_maps = num_physpages / DUMP_MAP_SZ; /* maps to cover entire mem */
-+ for (i = 0; i < nr_maps; i += DUMP_IND_MAP_SZ) {
-+ if (!(map = (unsigned long *)dump_alloc_mem(PAGE_SIZE))) {
-+ printk("Unable to alloc indirect map %ld\n",
-+ i / DUMP_IND_MAP_SZ);
-+ return -ENOMEM;
-+ }
-+ clear_page(map);
-+ *prev_map = (unsigned long)map;
-+ prev_map = &map[DUMP_IND_MAP_SZ];
-+ };
-+
-+ dump_mdev->curr_map = (unsigned long *)dump_mdev->indirect_map_root;
-+ dump_mdev->curr_map_offset = 0;
-+
-+ /*
-+ * allocate a few bootstrap pages: at least 1 map and 1 data page
-+ * plus enough to save the dump header
-+ */
-+ i = 0;
-+ do {
-+ if (!(addr = dump_alloc_mem(PAGE_SIZE))) {
-+ printk("Unable to alloc bootstrap page %ld\n", i);
-+ return -ENOMEM;
-+ }
-+
-+ page = virt_to_page(addr);
-+ if (dump_low_page(page)) {
-+ dump_free_mem(addr);
-+ continue;
-+ }
-+
-+ if (dump_mem_add_space(dump_mdev, page)) {
-+ printk("Warning: Unable to extend memdev "
-+ "space. Err %d\n", err);
-+ dump_free_mem(addr);
-+ continue;
-+ }
-+ i++;
-+ } while (i < DUMP_NR_BOOTSTRAP);
-+
-+ printk("dump memdev init: %ld maps, %ld bootstrap pgs, %ld free pgs\n",
-+ nr_maps, i, dump_mdev->last_offset >> PAGE_SHIFT);
-+
-+ dump_mdev->last_bs_offset = dump_mdev->last_offset;
-+
-+ return 0;
-+}
-+
-+/* Releases all pre-alloc'd pages */
-+int dump_mem_release(struct dump_dev *dev)
-+{
-+ struct dump_memdev *dump_mdev = DUMP_MDEV(dev);
-+ struct page *page, *map_page;
-+ unsigned long *map, *prev_map;
-+ void *addr;
-+ int i;
-+
-+ if (!dump_mdev->nr_free)
-+ return 0;
-+
-+ pr_debug("dump_mem_release\n");
-+ page = dump_mem_lookup(dump_mdev, 0);
-+ for (i = 0; page && (i < DUMP_NR_BOOTSTRAP - 1); i++) {
-+ if (PageHighMem(page))
-+ break;
-+ addr = page_address(page);
-+ if (!addr) {
-+ printk("page_address(%p) = NULL\n", page);
-+ break;
-+ }
-+ pr_debug("Freeing page at 0x%lx\n", addr);
-+ dump_free_mem(addr);
-+ if (dump_mdev->curr_map_offset >= DUMP_MAP_SZ - 1) {
-+ map_page = pfn_to_page(*dump_mdev->curr_map);
-+ if (PageHighMem(map_page))
-+ break;
-+ page = dump_mem_next_page(dump_mdev);
-+ addr = page_address(map_page);
-+ if (!addr) {
-+ printk("page_address(%p) = NULL\n",
-+ map_page);
-+ break;
-+ }
-+ pr_debug("Freeing map page at 0x%lx\n", addr);
-+ dump_free_mem(addr);
-+ i++;
-+ } else {
-+ page = dump_mem_next_page(dump_mdev);
-+ }
-+ }
-+
-+ /* now for the last used bootstrap page used as a map page */
-+ if ((i < DUMP_NR_BOOTSTRAP) && (*dump_mdev->curr_map)) {
-+ map_page = pfn_to_page(*dump_mdev->curr_map);
-+ if ((map_page) && !PageHighMem(map_page)) {
-+ addr = page_address(map_page);
-+ if (!addr) {
-+ printk("page_address(%p) = NULL\n", map_page);
-+ } else {
-+ pr_debug("Freeing map page at 0x%lx\n", addr);
-+ dump_free_mem(addr);
-+ i++;
-+ }
-+ }
-+ }
-+
-+ printk("Freed %d bootstrap pages\n", i);
-+
-+ /* free the indirect maps */
-+ map = (unsigned long *)dump_mdev->indirect_map_root;
-+
-+ i = 0;
-+ while (map) {
-+ prev_map = map;
-+ map = next_indirect_map(map);
-+ dump_free_mem(prev_map);
-+ i++;
-+ }
-+
-+ printk("Freed %d indirect map(s)\n", i);
-+
-+ /* Reset the indirect map */
-+ dump_mdev->indirect_map_root = 0;
-+ dump_mdev->curr_map = 0;
-+
-+ /* Reset the free list */
-+ dump_mdev->nr_free = 0;
-+
-+ dump_mdev->last_offset = dump_mdev->ddev.curr_offset = 0;
-+ dump_mdev->last_used_offset = 0;
-+ dump_mdev->curr_map = NULL;
-+ dump_mdev->curr_map_offset = 0;
-+ return 0;
-+}
-+
-+/*
-+ * Long term:
-+ * It is critical for this to be very strict. Cannot afford
-+ * to have anything running and accessing memory while we overwrite
-+ * memory (potential risk of data corruption).
-+ * If in doubt (e.g if a cpu is hung and not responding) just give
-+ * up and refuse to proceed with this scheme.
-+ *
-+ * Note: I/O will only happen after soft-boot/switchover, so we can
-+ * safely disable interrupts and force stop other CPUs if this is
-+ * going to be a disruptive dump, no matter what they
-+ * are in the middle of.
-+ */
-+/*
-+ * ATM Most of this is already taken care of in the nmi handler
-+ * We may halt the cpus rightaway if we know this is going to be disruptive
-+ * For now, since we've limited ourselves to overwriting free pages we
-+ * aren't doing much here. Eventually, we'd have to wait to make sure other
-+ * cpus aren't using memory we could be overwriting
-+ */
-+int dump_mem_silence(struct dump_dev *dev)
-+{
-+ struct dump_memdev *dump_mdev = DUMP_MDEV(dev);
-+
-+ if (dump_mdev->last_offset > dump_mdev->last_bs_offset) {
-+ /* prefer to run lkcd config & start with a clean slate */
-+ return -EEXIST;
-+ }
-+ return 0;
-+}
-+
-+extern int dump_overlay_resume(void);
-+
-+/* Trigger the next stage of dumping */
-+int dump_mem_resume(struct dump_dev *dev)
-+{
-+ dump_overlay_resume();
-+ return 0;
-+}
-+
-+/*
-+ * Allocate mem dev pages as required and copy buffer contents into it.
-+ * Fails if the no free pages are available
-+ * Keeping it simple and limited for starters (can modify this over time)
-+ * Does not handle holes or a sparse layout
-+ * Data must be in multiples of PAGE_SIZE
-+ */
-+int dump_mem_write(struct dump_dev *dev, void *buf, unsigned long len)
-+{
-+ struct dump_memdev *dump_mdev = DUMP_MDEV(dev);
-+ struct page *page;
-+ unsigned long n = 0;
-+ void *addr;
-+ unsigned long *saved_curr_map, saved_map_offset;
-+ int ret = 0;
-+
-+ pr_debug("dump_mem_write: offset 0x%llx, size %ld\n",
-+ dev->curr_offset, len);
-+
-+ if (dev->curr_offset + len > dump_mdev->last_offset) {
-+ printk("Out of space to write\n");
-+ return -ENOSPC;
-+ }
-+
-+ if ((len & (PAGE_SIZE - 1)) || (dev->curr_offset & (PAGE_SIZE - 1)))
-+ return -EINVAL; /* not aligned in units of page size */
-+
-+ saved_curr_map = dump_mdev->curr_map;
-+ saved_map_offset = dump_mdev->curr_map_offset;
-+ page = dump_mem_lookup(dump_mdev, dev->curr_offset >> PAGE_SHIFT);
-+
-+ for (n = len; (n > 0) && page; n -= PAGE_SIZE, buf += PAGE_SIZE ) {
-+ addr = kmap_atomic(page, KM_DUMP);
-+ /* memset(addr, 'x', PAGE_SIZE); */
-+ memcpy(addr, buf, PAGE_SIZE);
-+ kunmap_atomic(addr, KM_DUMP);
-+ /* dev->curr_offset += PAGE_SIZE; */
-+ page = dump_mem_next_page(dump_mdev);
-+ }
-+
-+ dump_mdev->curr_map = saved_curr_map;
-+ dump_mdev->curr_map_offset = saved_map_offset;
-+
-+ if (dump_mdev->last_used_offset < dev->curr_offset)
-+ dump_mdev->last_used_offset = dev->curr_offset;
-+
-+ return (len - n) ? (len - n) : ret ;
-+}
-+
-+/* dummy - always ready */
-+int dump_mem_ready(struct dump_dev *dev, void *buf)
-+{
-+ return 0;
-+}
-+
-+/*
-+ * Should check for availability of space to write upto the offset
-+ * affects only the curr_offset; last_offset untouched
-+ * Keep it simple: Only allow multiples of PAGE_SIZE for now
-+ */
-+int dump_mem_seek(struct dump_dev *dev, loff_t offset)
-+{
-+ struct dump_memdev *dump_mdev = DUMP_MDEV(dev);
-+
-+ if (offset & (PAGE_SIZE - 1))
-+ return -EINVAL; /* allow page size units only for now */
-+
-+ /* Are we exceeding available space ? */
-+ if (offset > dump_mdev->last_offset) {
-+ printk("dump_mem_seek failed for offset 0x%llx\n",
-+ offset);
-+ return -ENOSPC;
-+ }
-+
-+ dump_mdev->ddev.curr_offset = offset;
-+ return 0;
-+}
-+
-+struct dump_dev_ops dump_memdev_ops = {
-+ .open = dump_mem_open,
-+ .release = dump_mem_release,
-+ .silence = dump_mem_silence,
-+ .resume = dump_mem_resume,
-+ .seek = dump_mem_seek,
-+ .write = dump_mem_write,
-+ .read = NULL, /* not implemented at the moment */
-+ .ready = dump_mem_ready
-+};
-+
-+static struct dump_memdev default_dump_memdev = {
-+ .ddev = {.type_name = "memdev", .ops = &dump_memdev_ops,
-+ .device_id = 0x14}
-+ /* assume the rest of the fields are zeroed by default */
-+};
-+
-+/* may be overwritten if a previous dump exists */
-+struct dump_memdev *dump_memdev = &default_dump_memdev;
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_netdev.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_netdev.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_netdev.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,880 @@
-+/*
-+ * Implements the dump driver interface for saving a dump via network
-+ * interface.
-+ *
-+ * Some of this code has been taken/adapted from Ingo Molnar's netconsole
-+ * code. LKCD team expresses its thanks to Ingo.
-+ *
-+ * Started: June 2002 - Mohamed Abbas <mohamed.abbas@intel.com>
-+ * Adapted netconsole code to implement LKCD dump over the network.
-+ *
-+ * Nov 2002 - Bharata B. Rao <bharata@in.ibm.com>
-+ * Innumerable code cleanups, simplification and some fixes.
-+ * Netdump configuration done by ioctl instead of using module parameters.
-+ *
-+ * Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#include <net/tcp.h>
-+#include <net/udp.h>
-+#include <linux/delay.h>
-+#include <linux/random.h>
-+#include <linux/reboot.h>
-+#include <linux/module.h>
-+#include <linux/dump.h>
-+#include <linux/dump_netdev.h>
-+
-+#include <asm/unaligned.h>
-+
-+static int startup_handshake;
-+static int page_counter;
-+static struct net_device *dump_ndev;
-+static struct in_device *dump_in_dev;
-+static u16 source_port, target_port;
-+static u32 source_ip, target_ip;
-+static unsigned char daddr[6] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff} ;
-+static spinlock_t dump_skb_lock = SPIN_LOCK_UNLOCKED;
-+static int dump_nr_skbs;
-+static struct sk_buff *dump_skb;
-+static unsigned long flags_global;
-+static int netdump_in_progress;
-+static char device_name[IFNAMSIZ];
-+
-+/*
-+ * security depends on the trusted path between the netconsole
-+ * server and netconsole client, since none of the packets are
-+ * encrypted. The random magic number protects the protocol
-+ * against spoofing.
-+ */
-+static u64 dump_magic;
-+
-+#define MAX_UDP_CHUNK 1460
-+#define MAX_PRINT_CHUNK (MAX_UDP_CHUNK-HEADER_LEN)
-+
-+/*
-+ * We maintain a small pool of fully-sized skbs,
-+ * to make sure the message gets out even in
-+ * extreme OOM situations.
-+ */
-+#define DUMP_MAX_SKBS 32
-+
-+#define MAX_SKB_SIZE \
-+ (MAX_UDP_CHUNK + sizeof(struct udphdr) + \
-+ sizeof(struct iphdr) + sizeof(struct ethhdr))
-+
-+static void
-+dump_refill_skbs(void)
-+{
-+ struct sk_buff *skb;
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&dump_skb_lock, flags);
-+ while (dump_nr_skbs < DUMP_MAX_SKBS) {
-+ skb = alloc_skb(MAX_SKB_SIZE, GFP_ATOMIC);
-+ if (!skb)
-+ break;
-+ if (dump_skb)
-+ skb->next = dump_skb;
-+ else
-+ skb->next = NULL;
-+ dump_skb = skb;
-+ dump_nr_skbs++;
-+ }
-+ spin_unlock_irqrestore(&dump_skb_lock, flags);
-+}
-+
-+static struct
-+sk_buff * dump_get_skb(void)
-+{
-+ struct sk_buff *skb;
-+ unsigned long flags;
-+
-+ spin_lock_irqsave(&dump_skb_lock, flags);
-+ skb = dump_skb;
-+ if (skb) {
-+ dump_skb = skb->next;
-+ skb->next = NULL;
-+ dump_nr_skbs--;
-+ }
-+ spin_unlock_irqrestore(&dump_skb_lock, flags);
-+
-+ return skb;
-+}
-+
-+/*
-+ * Zap completed output skbs.
-+ */
-+static void
-+zap_completion_queue(void)
-+{
-+ int count;
-+ unsigned long flags;
-+ int cpu = smp_processor_id();
-+ struct softnet_data *softnet_data;
-+
-+
-+ softnet_data = &__get_cpu_var(softnet_data);
-+ count=0;
-+ if (softnet_data[cpu].completion_queue) {
-+ struct sk_buff *clist;
-+
-+ local_irq_save(flags);
-+ clist = softnet_data[cpu].completion_queue;
-+ softnet_data[cpu].completion_queue = NULL;
-+ local_irq_restore(flags);
-+
-+ while (clist != NULL) {
-+ struct sk_buff *skb = clist;
-+ clist = clist->next;
-+ __kfree_skb(skb);
-+ count++;
-+ if (count > 10000)
-+ printk("Error in sk list\n");
-+ }
-+ }
-+}
-+
-+static void
-+dump_send_skb(struct net_device *dev, const char *msg, unsigned int msg_len,
-+ reply_t *reply)
-+{
-+ int once = 1;
-+ int total_len, eth_len, ip_len, udp_len, count = 0;
-+ struct sk_buff *skb;
-+ struct udphdr *udph;
-+ struct iphdr *iph;
-+ struct ethhdr *eth;
-+
-+ udp_len = msg_len + HEADER_LEN + sizeof(*udph);
-+ ip_len = eth_len = udp_len + sizeof(*iph);
-+ total_len = eth_len + ETH_HLEN;
-+
-+repeat_loop:
-+ zap_completion_queue();
-+ if (dump_nr_skbs < DUMP_MAX_SKBS)
-+ dump_refill_skbs();
-+
-+ skb = alloc_skb(total_len, GFP_ATOMIC);
-+ if (!skb) {
-+ skb = dump_get_skb();
-+ if (!skb) {
-+ count++;
-+ if (once && (count == 1000000)) {
-+ printk("possibly FATAL: out of netconsole "
-+ "skbs!!! will keep retrying.\n");
-+ once = 0;
-+ }
-+ dev->poll_controller(dev);
-+ goto repeat_loop;
-+ }
-+ }
-+
-+ atomic_set(&skb->users, 1);
-+ skb_reserve(skb, total_len - msg_len - HEADER_LEN);
-+ skb->data[0] = NETCONSOLE_VERSION;
-+
-+ put_unaligned(htonl(reply->nr), (u32 *) (skb->data + 1));
-+ put_unaligned(htonl(reply->code), (u32 *) (skb->data + 5));
-+ put_unaligned(htonl(reply->info), (u32 *) (skb->data + 9));
-+
-+ memcpy(skb->data + HEADER_LEN, msg, msg_len);
-+ skb->len += msg_len + HEADER_LEN;
-+
-+ udph = (struct udphdr *) skb_push(skb, sizeof(*udph));
-+ udph->source = source_port;
-+ udph->dest = target_port;
-+ udph->len = htons(udp_len);
-+ udph->check = 0;
-+
-+ iph = (struct iphdr *)skb_push(skb, sizeof(*iph));
-+
-+ iph->version = 4;
-+ iph->ihl = 5;
-+ iph->tos = 0;
-+ iph->tot_len = htons(ip_len);
-+ iph->id = 0;
-+ iph->frag_off = 0;
-+ iph->ttl = 64;
-+ iph->protocol = IPPROTO_UDP;
-+ iph->check = 0;
-+ iph->saddr = source_ip;
-+ iph->daddr = target_ip;
-+ iph->check = ip_fast_csum((unsigned char *)iph, iph->ihl);
-+
-+ eth = (struct ethhdr *) skb_push(skb, ETH_HLEN);
-+
-+ eth->h_proto = htons(ETH_P_IP);
-+ memcpy(eth->h_source, dev->dev_addr, dev->addr_len);
-+ memcpy(eth->h_dest, daddr, dev->addr_len);
-+
-+ count=0;
-+repeat_poll:
-+ spin_lock(&dev->xmit_lock);
-+ dev->xmit_lock_owner = smp_processor_id();
-+
-+ count++;
-+
-+
-+ if (netif_queue_stopped(dev)) {
-+ dev->xmit_lock_owner = -1;
-+ spin_unlock(&dev->xmit_lock);
-+
-+ dev->poll_controller(dev);
-+ zap_completion_queue();
-+
-+
-+ goto repeat_poll;
-+ }
-+
-+ dev->hard_start_xmit(skb, dev);
-+
-+ dev->xmit_lock_owner = -1;
-+ spin_unlock(&dev->xmit_lock);
-+}
-+
-+static unsigned short
-+udp_check(struct udphdr *uh, int len, unsigned long saddr, unsigned long daddr,
-+ unsigned long base)
-+{
-+ return csum_tcpudp_magic(saddr, daddr, len, IPPROTO_UDP, base);
-+}
-+
-+static int
-+udp_checksum_init(struct sk_buff *skb, struct udphdr *uh,
-+ unsigned short ulen, u32 saddr, u32 daddr)
-+{
-+ if (uh->check == 0) {
-+ skb->ip_summed = CHECKSUM_UNNECESSARY;
-+ } else if (skb->ip_summed == CHECKSUM_HW) {
-+ skb->ip_summed = CHECKSUM_UNNECESSARY;
-+ if (!udp_check(uh, ulen, saddr, daddr, skb->csum))
-+ return 0;
-+ skb->ip_summed = CHECKSUM_NONE;
-+ }
-+ if (skb->ip_summed != CHECKSUM_UNNECESSARY)
-+ skb->csum = csum_tcpudp_nofold(saddr, daddr, ulen,
-+ IPPROTO_UDP, 0);
-+ /* Probably, we should checksum udp header (it should be in cache
-+ * in any case) and data in tiny packets (< rx copybreak).
-+ */
-+ return 0;
-+}
-+
-+static __inline__ int
-+__udp_checksum_complete(struct sk_buff *skb)
-+{
-+ return (unsigned short)csum_fold(skb_checksum(skb, 0, skb->len,
-+ skb->csum));
-+}
-+
-+static __inline__
-+int udp_checksum_complete(struct sk_buff *skb)
-+{
-+ return skb->ip_summed != CHECKSUM_UNNECESSARY &&
-+ __udp_checksum_complete(skb);
-+}
-+
-+int new_req = 0;
-+static req_t req;
-+
-+static int
-+dump_rx_hook(struct sk_buff *skb)
-+{
-+ int proto;
-+ struct iphdr *iph;
-+ struct udphdr *uh;
-+ __u32 len, saddr, daddr, ulen;
-+ req_t *__req;
-+
-+ /*
-+ * First check if were are dumping or doing startup handshake, if
-+ * not quickly return.
-+ */
-+ if (!netdump_in_progress)
-+ return NET_RX_SUCCESS;
-+
-+ if (skb->dev->type != ARPHRD_ETHER)
-+ goto out;
-+
-+ proto = ntohs(skb->mac.ethernet->h_proto);
-+ if (proto != ETH_P_IP)
-+ goto out;
-+
-+ if (skb->pkt_type == PACKET_OTHERHOST)
-+ goto out;
-+
-+ if (skb_shared(skb))
-+ goto out;
-+
-+ /* IP header correctness testing: */
-+ iph = (struct iphdr *)skb->data;
-+ if (!pskb_may_pull(skb, sizeof(struct iphdr)))
-+ goto out;
-+
-+ if (iph->ihl < 5 || iph->version != 4)
-+ goto out;
-+
-+ if (!pskb_may_pull(skb, iph->ihl*4))
-+ goto out;
-+
-+ if (ip_fast_csum((u8 *)iph, iph->ihl) != 0)
-+ goto out;
-+
-+ len = ntohs(iph->tot_len);
-+ if (skb->len < len || len < iph->ihl*4)
-+ goto out;
-+
-+ saddr = iph->saddr;
-+ daddr = iph->daddr;
-+ if (iph->protocol != IPPROTO_UDP)
-+ goto out;
-+
-+ if (source_ip != daddr)
-+ goto out;
-+
-+ if (target_ip != saddr)
-+ goto out;
-+
-+ len -= iph->ihl*4;
-+ uh = (struct udphdr *)(((char *)iph) + iph->ihl*4);
-+ ulen = ntohs(uh->len);
-+
-+ if (ulen != len || ulen < (sizeof(*uh) + sizeof(*__req)))
-+ goto out;
-+
-+ if (udp_checksum_init(skb, uh, ulen, saddr, daddr) < 0)
-+ goto out;
-+
-+ if (udp_checksum_complete(skb))
-+ goto out;
-+
-+ if (source_port != uh->dest)
-+ goto out;
-+
-+ if (target_port != uh->source)
-+ goto out;
-+
-+ __req = (req_t *)(uh + 1);
-+ if ((ntohl(__req->command) != COMM_GET_MAGIC) &&
-+ (ntohl(__req->command) != COMM_HELLO) &&
-+ (ntohl(__req->command) != COMM_START_WRITE_NETDUMP_ACK) &&
-+ (ntohl(__req->command) != COMM_START_NETDUMP_ACK) &&
-+ (memcmp(&__req->magic, &dump_magic, sizeof(dump_magic)) != 0))
-+ goto out;
-+
-+ req.magic = ntohl(__req->magic);
-+ req.command = ntohl(__req->command);
-+ req.from = ntohl(__req->from);
-+ req.to = ntohl(__req->to);
-+ req.nr = ntohl(__req->nr);
-+ new_req = 1;
-+out:
-+ return NET_RX_DROP;
-+}
-+
-+static void
-+dump_send_mem(struct net_device *dev, req_t *req, const char* buff, size_t len)
-+{
-+ int i;
-+
-+ int nr_chunks = len/1024;
-+ reply_t reply;
-+
-+ reply.nr = req->nr;
-+ reply.info = 0;
-+
-+ if ( nr_chunks <= 0)
-+ nr_chunks = 1;
-+ for (i = 0; i < nr_chunks; i++) {
-+ unsigned int offset = i*1024;
-+ reply.code = REPLY_MEM;
-+ reply.info = offset;
-+ dump_send_skb(dev, buff + offset, 1024, &reply);
-+ }
-+}
-+static void dump_do_sysrq(int key)
-+{
-+ struct pt_regs regs;
-+
-+ get_current_regs(®s);
-+ handle_sysrq(key, ®s, NULL, NULL);
-+}
-+
-+/*
-+ * This function waits for the client to acknowledge the receipt
-+ * of the netdump startup reply, with the possibility of packets
-+ * getting lost. We resend the startup packet if no ACK is received,
-+ * after a 1 second delay.
-+ *
-+ * (The client can test the success of the handshake via the HELLO
-+ * command, and send ACKs until we enter netdump mode.)
-+ */
-+static int
-+dump_handshake(struct dump_dev *net_dev)
-+{
-+ char tmp[200];
-+ reply_t reply;
-+ int i, j;
-+
-+ if (startup_handshake) {
-+ sprintf(tmp, "NETDUMP start, waiting for start-ACK.\n");
-+ reply.code = REPLY_START_NETDUMP;
-+ reply.nr = 0;
-+ reply.info = 0;
-+ } else {
-+ sprintf(tmp, "NETDUMP start, waiting for start-ACK.\n");
-+ reply.code = REPLY_START_WRITE_NETDUMP;
-+ reply.nr = net_dev->curr_offset;
-+ reply.info = net_dev->curr_offset;
-+ }
-+
-+ /* send 300 handshake packets before declaring failure */
-+ for (i = 0; i < 300; i++) {
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+
-+ /* wait 1 sec */
-+ for (j = 0; j < 10000; j++) {
-+ udelay(100);
-+ dump_ndev->poll_controller(dump_ndev);
-+ zap_completion_queue();
-+ if (new_req)
-+ break;
-+ }
-+
-+ /*
-+ * if there is no new request, try sending the handshaking
-+ * packet again
-+ */
-+ if (!new_req)
-+ continue;
-+
-+ /*
-+ * check if the new request is of the expected type,
-+ * if so, return, else try sending the handshaking
-+ * packet again
-+ */
-+ if (startup_handshake) {
-+ if (req.command == COMM_HELLO || req.command ==
-+ COMM_START_NETDUMP_ACK) {
-+ return 0;
-+ } else {
-+ new_req = 0;
-+ continue;
-+ }
-+ } else {
-+ if (req.command == COMM_SEND_MEM) {
-+ return 0;
-+ } else {
-+ new_req = 0;
-+ continue;
-+ }
-+ }
-+ }
-+ return -1;
-+}
-+
-+static ssize_t
-+do_netdump(struct dump_dev *net_dev, const char* buff, size_t len)
-+{
-+ reply_t reply;
-+ char tmp[200];
-+ ssize_t ret = 0;
-+ int repeatCounter, counter, total_loop;
-+
-+ netdump_in_progress = 1;
-+
-+ if (dump_handshake(net_dev) < 0) {
-+ printk("network dump failed due to handshake failure\n");
-+ goto out;
-+ }
-+
-+ /*
-+ * Ideally startup handshake should be done during dump configuration,
-+ * i.e., in dump_net_open(). This will be done when I figure out
-+ * the dependency between startup handshake, subsequent write and
-+ * various commands wrt to net-server.
-+ */
-+ if (startup_handshake)
-+ startup_handshake = 0;
-+
-+ counter = 0;
-+ repeatCounter = 0;
-+ total_loop = 0;
-+ while (1) {
-+ if (!new_req) {
-+ dump_ndev->poll_controller(dump_ndev);
-+ zap_completion_queue();
-+ }
-+ if (!new_req) {
-+ repeatCounter++;
-+
-+ if (repeatCounter > 5) {
-+ counter++;
-+ if (counter > 10000) {
-+ if (total_loop >= 100000) {
-+ printk("Time OUT LEAVE NOW\n");
-+ goto out;
-+ } else {
-+ total_loop++;
-+ printk("Try number %d out of "
-+ "10 before Time Out\n",
-+ total_loop);
-+ }
-+ }
-+ mdelay(1);
-+ repeatCounter = 0;
-+ }
-+ continue;
-+ }
-+ repeatCounter = 0;
-+ counter = 0;
-+ total_loop = 0;
-+ new_req = 0;
-+ switch (req.command) {
-+ case COMM_NONE:
-+ break;
-+
-+ case COMM_SEND_MEM:
-+ dump_send_mem(dump_ndev, &req, buff, len);
-+ break;
-+
-+ case COMM_EXIT:
-+ case COMM_START_WRITE_NETDUMP_ACK:
-+ ret = len;
-+ goto out;
-+
-+ case COMM_HELLO:
-+ sprintf(tmp, "Hello, this is netdump version "
-+ "0.%02d\n", NETCONSOLE_VERSION);
-+ reply.code = REPLY_HELLO;
-+ reply.nr = req.nr;
-+ reply.info = net_dev->curr_offset;
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ break;
-+
-+ case COMM_GET_PAGE_SIZE:
-+ sprintf(tmp, "PAGE_SIZE: %ld\n", PAGE_SIZE);
-+ reply.code = REPLY_PAGE_SIZE;
-+ reply.nr = req.nr;
-+ reply.info = PAGE_SIZE;
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ break;
-+
-+ case COMM_GET_NR_PAGES:
-+ reply.code = REPLY_NR_PAGES;
-+ reply.nr = req.nr;
-+ reply.info = num_physpages;
-+ reply.info = page_counter;
-+ sprintf(tmp, "Number of pages: %ld\n", num_physpages);
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ break;
-+
-+ case COMM_GET_MAGIC:
-+ reply.code = REPLY_MAGIC;
-+ reply.nr = req.nr;
-+ reply.info = NETCONSOLE_VERSION;
-+ dump_send_skb(dump_ndev, (char *)&dump_magic,
-+ sizeof(dump_magic), &reply);
-+ break;
-+ case COMM_SYSRQ:
-+ dump_do_sysrq(req.from);
-+ reply.code = REPLY_SYSRQ;
-+ reply.nr = req.nr;
-+ reply.info = req.from;
-+ sprintf(tmp, "SYSRQ command %d \n", req.from);
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ break;
-+ default:
-+ reply.code = REPLY_ERROR;
-+ reply.nr = req.nr;
-+ reply.info = req.command;
-+ sprintf(tmp, "Got unknown command code %d!\n",
-+ req.command);
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ break;
-+ }
-+ }
-+out:
-+ netdump_in_progress = 0;
-+ return ret;
-+}
-+
-+static int
-+dump_validate_config(void)
-+{
-+ source_ip = dump_in_dev->ifa_list->ifa_local;
-+ if (!source_ip) {
-+ printk("network device %s has no local address, "
-+ "aborting.\n", device_name);
-+ return -1;
-+ }
-+
-+#define IP(x) ((unsigned char *)&source_ip)[x]
-+ printk("Source %d.%d.%d.%d", IP(0), IP(1), IP(2), IP(3));
-+#undef IP
-+
-+ if (!source_port) {
-+ printk("source_port parameter not specified, aborting.\n");
-+ return -1;
-+ }
-+ printk(":%i\n", source_port);
-+ source_port = htons(source_port);
-+
-+ if (!target_ip) {
-+ printk("target_ip parameter not specified, aborting.\n");
-+ return -1;
-+ }
-+
-+#define IP(x) ((unsigned char *)&target_ip)[x]
-+ printk("Target %d.%d.%d.%d", IP(0), IP(1), IP(2), IP(3));
-+#undef IP
-+
-+ if (!target_port) {
-+ printk("target_port parameter not specified, aborting.\n");
-+ return -1;
-+ }
-+ printk(":%i\n", target_port);
-+ target_port = htons(target_port);
-+
-+ printk("Target Ethernet Address %02x:%02x:%02x:%02x:%02x:%02x",
-+ daddr[0], daddr[1], daddr[2], daddr[3], daddr[4], daddr[5]);
-+
-+ if ((daddr[0] & daddr[1] & daddr[2] & daddr[3] & daddr[4] &
-+ daddr[5]) == 255)
-+ printk("(Broadcast)");
-+ printk("\n");
-+ return 0;
-+}
-+
-+/*
-+ * Prepares the dump device so we can take a dump later.
-+ * Validates the netdump configuration parameters.
-+ *
-+ * TODO: Network connectivity check should be done here.
-+ */
-+static int
-+dump_net_open(struct dump_dev *net_dev, unsigned long arg)
-+{
-+ int retval = 0;
-+
-+ /* get the interface name */
-+ if (copy_from_user(device_name, (void *)arg, IFNAMSIZ))
-+ return -EFAULT;
-+
-+ if (!(dump_ndev = dev_get_by_name(device_name))) {
-+ printk("network device %s does not exist, aborting.\n",
-+ device_name);
-+ return -ENODEV;
-+ }
-+
-+ if (!dump_ndev->poll_controller) {
-+ printk("network device %s does not implement polling yet, "
-+ "aborting.\n", device_name);
-+ retval = -1; /* return proper error */
-+ goto err1;
-+ }
-+
-+ if (!(dump_in_dev = in_dev_get(dump_ndev))) {
-+ printk("network device %s is not an IP protocol device, "
-+ "aborting.\n", device_name);
-+ retval = -EINVAL;
-+ goto err1;
-+ }
-+
-+ if ((retval = dump_validate_config()) < 0)
-+ goto err2;
-+
-+ net_dev->curr_offset = 0;
-+ printk("Network device %s successfully configured for dumping\n",
-+ device_name);
-+ return retval;
-+err2:
-+ in_dev_put(dump_in_dev);
-+err1:
-+ dev_put(dump_ndev);
-+ return retval;
-+}
-+
-+/*
-+ * Close the dump device and release associated resources
-+ * Invoked when unconfiguring the dump device.
-+ */
-+static int
-+dump_net_release(struct dump_dev *net_dev)
-+{
-+ if (dump_in_dev)
-+ in_dev_put(dump_in_dev);
-+ if (dump_ndev)
-+ dev_put(dump_ndev);
-+ return 0;
-+}
-+
-+/*
-+ * Prepare the dump device for use (silence any ongoing activity
-+ * and quiesce state) when the system crashes.
-+ */
-+static int
-+dump_net_silence(struct dump_dev *net_dev)
-+{
-+ local_irq_save(flags_global);
-+ dump_ndev->rx_hook = dump_rx_hook;
-+ startup_handshake = 1;
-+ net_dev->curr_offset = 0;
-+ printk("Dumping to network device %s on CPU %d ...\n", device_name,
-+ smp_processor_id());
-+ return 0;
-+}
-+
-+/*
-+ * Invoked when dumping is done. This is the time to put things back
-+ * (i.e. undo the effects of dump_block_silence) so the device is
-+ * available for normal use.
-+ */
-+static int
-+dump_net_resume(struct dump_dev *net_dev)
-+{
-+ int indx;
-+ reply_t reply;
-+ char tmp[200];
-+
-+ if (!dump_ndev)
-+ return (0);
-+
-+ sprintf(tmp, "NETDUMP end.\n");
-+ for( indx = 0; indx < 6; indx++) {
-+ reply.code = REPLY_END_NETDUMP;
-+ reply.nr = 0;
-+ reply.info = 0;
-+ dump_send_skb(dump_ndev, tmp, strlen(tmp), &reply);
-+ }
-+ printk("NETDUMP END!\n");
-+ local_irq_restore(flags_global);
-+ dump_ndev->rx_hook = NULL;
-+ startup_handshake = 0;
-+ return 0;
-+}
-+
-+/*
-+ * Seek to the specified offset in the dump device.
-+ * Makes sure this is a valid offset, otherwise returns an error.
-+ */
-+static int
-+dump_net_seek(struct dump_dev *net_dev, loff_t off)
-+{
-+ /*
-+ * For now using DUMP_HEADER_OFFSET as hard coded value,
-+ * See dump_block_seekin dump_blockdev.c to know how to
-+ * do this properly.
-+ */
-+ net_dev->curr_offset = off + DUMP_HEADER_OFFSET;
-+ return 0;
-+}
-+
-+/*
-+ *
-+ */
-+static int
-+dump_net_write(struct dump_dev *net_dev, void *buf, unsigned long len)
-+{
-+ int cnt, i, off;
-+ ssize_t ret;
-+
-+ cnt = len/ PAGE_SIZE;
-+
-+ for (i = 0; i < cnt; i++) {
-+ off = i* PAGE_SIZE;
-+ ret = do_netdump(net_dev, buf+off, PAGE_SIZE);
-+ if (ret <= 0)
-+ return -1;
-+ net_dev->curr_offset = net_dev->curr_offset + PAGE_SIZE;
-+ }
-+ return len;
-+}
-+
-+/*
-+ * check if the last dump i/o is over and ready for next request
-+ */
-+static int
-+dump_net_ready(struct dump_dev *net_dev, void *buf)
-+{
-+ return 0;
-+}
-+
-+/*
-+ * ioctl function used for configuring network dump
-+ */
-+static int
-+dump_net_ioctl(struct dump_dev *net_dev, unsigned int cmd, unsigned long arg)
-+{
-+ switch (cmd) {
-+ case DIOSTARGETIP:
-+ target_ip = arg;
-+ break;
-+ case DIOSTARGETPORT:
-+ target_port = (u16)arg;
-+ break;
-+ case DIOSSOURCEPORT:
-+ source_port = (u16)arg;
-+ break;
-+ case DIOSETHADDR:
-+ return copy_from_user(daddr, (void *)arg, 6);
-+ break;
-+ case DIOGTARGETIP:
-+ case DIOGTARGETPORT:
-+ case DIOGSOURCEPORT:
-+ case DIOGETHADDR:
-+ break;
-+ default:
-+ return -EINVAL;
-+ }
-+ return 0;
-+}
-+
-+struct dump_dev_ops dump_netdev_ops = {
-+ .open = dump_net_open,
-+ .release = dump_net_release,
-+ .silence = dump_net_silence,
-+ .resume = dump_net_resume,
-+ .seek = dump_net_seek,
-+ .write = dump_net_write,
-+ /* .read not implemented */
-+ .ready = dump_net_ready,
-+ .ioctl = dump_net_ioctl
-+};
-+
-+static struct dump_dev default_dump_netdev = {
-+ .type_name = "networkdev",
-+ .ops = &dump_netdev_ops,
-+ .curr_offset = 0
-+};
-+
-+static int __init
-+dump_netdev_init(void)
-+{
-+ default_dump_netdev.curr_offset = 0;
-+
-+ if (dump_register_device(&default_dump_netdev) < 0) {
-+ printk("network dump device driver registration failed\n");
-+ return -1;
-+ }
-+ printk("network device driver for LKCD registered\n");
-+
-+ get_random_bytes(&dump_magic, sizeof(dump_magic));
-+ return 0;
-+}
-+
-+static void __exit
-+dump_netdev_cleanup(void)
-+{
-+ dump_unregister_device(&default_dump_netdev);
-+}
-+
-+MODULE_AUTHOR("LKCD Development Team <lkcd-devel@lists.sourceforge.net>");
-+MODULE_DESCRIPTION("Network Dump Driver for Linux Kernel Crash Dump (LKCD)");
-+MODULE_LICENSE("GPL");
-+
-+module_init(dump_netdev_init);
-+module_exit(dump_netdev_cleanup);
-Index: linux-2.6.0-test5/drivers/dump/dump_overlay.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_overlay.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_overlay.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,848 @@
-+/*
-+ * Two-stage soft-boot based dump scheme methods (memory overlay
-+ * with post soft-boot writeout)
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ *
-+ * This approach of saving the dump in memory and writing it
-+ * out after a softboot without clearing memory is derived from the
-+ * Mission Critical Linux dump implementation. Credits and a big
-+ * thanks for letting the lkcd project make use of the excellent
-+ * piece of work and also for helping with clarifications and
-+ * tips along the way are due to:
-+ * Dave Winchell <winchell@mclx.com> (primary author of mcore)
-+ * and also to
-+ * Jeff Moyer <moyer@mclx.com>
-+ * Josh Huber <huber@mclx.com>
-+ *
-+ * For those familiar with the mcore implementation, the key
-+ * differences/extensions here are in allowing entire memory to be
-+ * saved (in compressed form) through a careful ordering scheme
-+ * on both the way down as well on the way up after boot, the latter
-+ * for supporting the LKCD notion of passes in which most critical
-+ * data is the first to be saved to the dump device. Also the post
-+ * boot writeout happens from within the kernel rather than driven
-+ * from userspace.
-+ *
-+ * The sequence is orchestrated through the abstraction of "dumpers",
-+ * one for the first stage which then sets up the dumper for the next
-+ * stage, providing for a smooth and flexible reuse of the singlestage
-+ * dump scheme methods and a handle to pass dump device configuration
-+ * information across the soft boot.
-+ *
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/*
-+ * Disruptive dumping using the second kernel soft-boot option
-+ * for issuing dump i/o operates in 2 stages:
-+ *
-+ * (1) - Saves the (compressed & formatted) dump in memory using a
-+ * carefully ordered overlay scheme designed to capture the
-+ * entire physical memory or selective portions depending on
-+ * dump config settings,
-+ * - Registers the stage 2 dumper and
-+ * - Issues a soft reboot w/o clearing memory.
-+ *
-+ * The overlay scheme starts with a small bootstrap free area
-+ * and follows a reverse ordering of passes wherein it
-+ * compresses and saves data starting with the least critical
-+ * areas first, thus freeing up the corresponding pages to
-+ * serve as destination for subsequent data to be saved, and
-+ * so on. With a good compression ratio, this makes it feasible
-+ * to capture an entire physical memory dump without significantly
-+ * reducing memory available during regular operation.
-+ *
-+ * (2) Post soft-reboot, runs through the saved memory dump and
-+ * writes it out to disk, this time around, taking care to
-+ * save the more critical data first (i.e. pages which figure
-+ * in early passes for a regular dump). Finally issues a
-+ * clean reboot.
-+ *
-+ * Since the data was saved in memory after selection/filtering
-+ * and formatted as per the chosen output dump format, at this
-+ * stage the filter and format actions are just dummy (or
-+ * passthrough) actions, except for influence on ordering of
-+ * passes.
-+ */
-+
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/highmem.h>
-+#include <linux/bootmem.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+extern struct list_head dumper_list_head;
-+extern struct dump_memdev *dump_memdev;
-+extern struct dumper dumper_stage2;
-+struct dump_config_block *dump_saved_config = NULL;
-+extern struct dump_blockdev *dump_blockdev;
-+static struct dump_memdev *saved_dump_memdev = NULL;
-+static struct dumper *saved_dumper = NULL;
-+
-+/* For testing
-+extern void dump_display_map(struct dump_memdev *);
-+*/
-+
-+struct dumper *dumper_by_name(char *name)
-+{
-+#ifdef LATER
-+ struct dumper *dumper;
-+ list_for_each_entry(dumper, &dumper_list_head, dumper_list)
-+ if (!strncmp(dumper->name, name, 32))
-+ return dumper;
-+
-+ /* not found */
-+ return NULL;
-+#endif
-+ /* Temporary proof of concept */
-+ if (!strncmp(dumper_stage2.name, name, 32))
-+ return &dumper_stage2;
-+ else
-+ return NULL;
-+}
-+
-+#ifdef CONFIG_CRASH_DUMP_SOFTBOOT
-+extern void dump_early_reserve_map(struct dump_memdev *);
-+
-+void crashdump_reserve(void)
-+{
-+ extern unsigned long crashdump_addr;
-+
-+ if (crashdump_addr == 0xdeadbeef)
-+ return;
-+
-+ /* reserve dump config and saved dump pages */
-+ dump_saved_config = (struct dump_config_block *)crashdump_addr;
-+ /* magic verification */
-+ if (dump_saved_config->magic != DUMP_MAGIC_LIVE) {
-+ printk("Invalid dump magic. Ignoring dump\n");
-+ dump_saved_config = NULL;
-+ return;
-+ }
-+
-+ printk("Dump may be available from previous boot\n");
-+
-+ reserve_bootmem(virt_to_phys((void *)crashdump_addr),
-+ PAGE_ALIGN(sizeof(struct dump_config_block)));
-+ dump_early_reserve_map(&dump_saved_config->memdev);
-+
-+}
-+#endif
-+
-+/*
-+ * Loads the dump configuration from a memory block saved across soft-boot
-+ * The ops vectors need fixing up as the corresp. routines may have
-+ * relocated in the new soft-booted kernel.
-+ */
-+int dump_load_config(struct dump_config_block *config)
-+{
-+ struct dumper *dumper;
-+ struct dump_data_filter *filter_table, *filter;
-+ struct dump_dev *dev;
-+ int i;
-+
-+ if (config->magic != DUMP_MAGIC_LIVE)
-+ return -ENOENT; /* not a valid config */
-+
-+ /* initialize generic config data */
-+ memcpy(&dump_config, &config->config, sizeof(dump_config));
-+
-+ /* initialize dumper state */
-+ if (!(dumper = dumper_by_name(config->dumper.name))) {
-+ printk("dumper name mismatch\n");
-+ return -ENOENT; /* dumper mismatch */
-+ }
-+
-+ /* verify and fixup schema */
-+ if (strncmp(dumper->scheme->name, config->scheme.name, 32)) {
-+ printk("dumper scheme mismatch\n");
-+ return -ENOENT; /* mismatch */
-+ }
-+ config->scheme.ops = dumper->scheme->ops;
-+ config->dumper.scheme = &config->scheme;
-+
-+ /* verify and fixup filter operations */
-+ filter_table = dumper->filter;
-+ for (i = 0, filter = config->filter_table;
-+ ((i < MAX_PASSES) && filter_table[i].selector);
-+ i++, filter++) {
-+ if (strncmp(filter_table[i].name, filter->name, 32)) {
-+ printk("dump filter mismatch\n");
-+ return -ENOENT; /* filter name mismatch */
-+ }
-+ filter->selector = filter_table[i].selector;
-+ }
-+ config->dumper.filter = config->filter_table;
-+
-+ /* fixup format */
-+ if (strncmp(dumper->fmt->name, config->fmt.name, 32)) {
-+ printk("dump format mismatch\n");
-+ return -ENOENT; /* mismatch */
-+ }
-+ config->fmt.ops = dumper->fmt->ops;
-+ config->dumper.fmt = &config->fmt;
-+
-+ /* fixup target device */
-+ dev = (struct dump_dev *)(&config->dev[0]);
-+ if (dumper->dev == NULL) {
-+ pr_debug("Vanilla dumper - assume default\n");
-+ if (dump_dev == NULL)
-+ return -ENODEV;
-+ dumper->dev = dump_dev;
-+ }
-+
-+ if (strncmp(dumper->dev->type_name, dev->type_name, 32)) {
-+ printk("dump dev type mismatch %s instead of %s\n",
-+ dev->type_name, dumper->dev->type_name);
-+ return -ENOENT; /* mismatch */
-+ }
-+ dev->ops = dumper->dev->ops;
-+ config->dumper.dev = dev;
-+
-+ /* fixup memory device containing saved dump pages */
-+ /* assume statically init'ed dump_memdev */
-+ config->memdev.ddev.ops = dump_memdev->ddev.ops;
-+ /* switch to memdev from prev boot */
-+ saved_dump_memdev = dump_memdev; /* remember current */
-+ dump_memdev = &config->memdev;
-+
-+ /* Make this the current primary dumper */
-+ dump_config.dumper = &config->dumper;
-+
-+ return 0;
-+}
-+
-+/* Saves the dump configuration in a memory block for use across a soft-boot */
-+int dump_save_config(struct dump_config_block *config)
-+{
-+ printk("saving dump config settings\n");
-+
-+ /* dump config settings */
-+ memcpy(&config->config, &dump_config, sizeof(dump_config));
-+
-+ /* dumper state */
-+ memcpy(&config->dumper, dump_config.dumper, sizeof(struct dumper));
-+ memcpy(&config->scheme, dump_config.dumper->scheme,
-+ sizeof(struct dump_scheme));
-+ memcpy(&config->fmt, dump_config.dumper->fmt, sizeof(struct dump_fmt));
-+ memcpy(&config->dev[0], dump_config.dumper->dev,
-+ sizeof(struct dump_anydev));
-+ memcpy(&config->filter_table, dump_config.dumper->filter,
-+ sizeof(struct dump_data_filter)*MAX_PASSES);
-+
-+ /* handle to saved mem pages */
-+ memcpy(&config->memdev, dump_memdev, sizeof(struct dump_memdev));
-+
-+ config->magic = DUMP_MAGIC_LIVE;
-+
-+ return 0;
-+}
-+
-+int dump_init_stage2(struct dump_config_block *saved_config)
-+{
-+ int err = 0;
-+
-+ pr_debug("dump_init_stage2\n");
-+ /* Check if dump from previous boot exists */
-+ if (saved_config) {
-+ printk("loading dumper from previous boot \n");
-+ /* load and configure dumper from previous boot */
-+ if ((err = dump_load_config(saved_config)))
-+ return err;
-+
-+ if (!dump_oncpu) {
-+ if ((err = dump_configure(dump_config.dump_device))) {
-+ printk("Stage 2 dump configure failed\n");
-+ return err;
-+ }
-+ }
-+
-+ dumper_reset();
-+ dump_dev = dump_config.dumper->dev;
-+ /* write out the dump */
-+ err = dump_generic_execute(NULL, NULL);
-+
-+ dump_saved_config = NULL;
-+
-+ if (!dump_oncpu) {
-+ dump_unconfigure();
-+ }
-+
-+ return err;
-+
-+ } else {
-+ /* no dump to write out */
-+ printk("no dumper from previous boot \n");
-+ return 0;
-+ }
-+}
-+
-+extern void dump_mem_markpages(struct dump_memdev *);
-+
-+int dump_switchover_stage(void)
-+{
-+ int ret = 0;
-+
-+ /* trigger stage 2 rightaway - in real life would be after soft-boot */
-+ /* dump_saved_config would be a boot param */
-+ saved_dump_memdev = dump_memdev;
-+ saved_dumper = dump_config.dumper;
-+ ret = dump_init_stage2(dump_saved_config);
-+ dump_memdev = saved_dump_memdev;
-+ dump_config.dumper = saved_dumper;
-+ return ret;
-+}
-+
-+int dump_activate_softboot(void)
-+{
-+ int err = 0;
-+
-+ /* temporary - switchover to writeout previously saved dump */
-+ err = dump_switchover_stage(); /* non-disruptive case */
-+ if (dump_oncpu)
-+ dump_config.dumper = &dumper_stage1; /* set things back */
-+
-+ return err;
-+
-+ dump_silence_level = DUMP_HALT_CPUS;
-+ /* wait till we become the only cpu */
-+ /* maybe by checking for online cpus ? */
-+
-+ /* now call into kexec */
-+
-+ /* TBD/Fixme:
-+ * should we call reboot notifiers ? inappropriate for panic ?
-+ * what about device_shutdown() ?
-+ * is explicit bus master disabling needed or can we do that
-+ * through driverfs ?
-+ */
-+ return 0;
-+}
-+
-+/* --- DUMP SCHEME ROUTINES --- */
-+
-+static inline int dump_buf_pending(struct dumper *dumper)
-+{
-+ return (dumper->curr_buf - dumper->dump_buf);
-+}
-+
-+/* Invoked during stage 1 of soft-reboot based dumping */
-+int dump_overlay_sequencer(void)
-+{
-+ struct dump_data_filter *filter = dump_config.dumper->filter;
-+ struct dump_data_filter *filter2 = dumper_stage2.filter;
-+ int pass = 0, err = 0, save = 0;
-+ int (*action)(unsigned long, unsigned long);
-+
-+ /* Make sure gzip compression is being used */
-+ if (dump_config.dumper->compress->compress_type != DUMP_COMPRESS_GZIP) {
-+ printk(" Please set GZIP compression \n");
-+ return -EINVAL;
-+ }
-+
-+ /* start filling in dump data right after the header */
-+ dump_config.dumper->curr_offset =
-+ PAGE_ALIGN(dump_config.dumper->header_len);
-+
-+ /* Locate the last pass */
-+ for (;filter->selector; filter++, pass++);
-+
-+ /*
-+ * Start from the end backwards: overlay involves a reverse
-+ * ordering of passes, since less critical pages are more
-+ * likely to be reusable as scratch space once we are through
-+ * with them.
-+ */
-+ for (--pass, --filter; pass >= 0; pass--, filter--)
-+ {
-+ /* Assumes passes are exclusive (even across dumpers) */
-+ /* Requires care when coding the selection functions */
-+ if ((save = filter->level_mask & dump_config.level))
-+ action = dump_save_data;
-+ else
-+ action = dump_skip_data;
-+
-+ /* Remember the offset where this pass started */
-+ /* The second stage dumper would use this */
-+ if (dump_buf_pending(dump_config.dumper) & (PAGE_SIZE - 1)) {
-+ pr_debug("Starting pass %d with pending data\n", pass);
-+ pr_debug("filling dummy data to page-align it\n");
-+ dump_config.dumper->curr_buf = (void *)PAGE_ALIGN(
-+ (unsigned long)dump_config.dumper->curr_buf);
-+ }
-+
-+ filter2[pass].start = dump_config.dumper->curr_offset
-+ + dump_buf_pending(dump_config.dumper);
-+
-+ err = dump_iterator(pass, action, filter);
-+
-+ filter2[pass].end = dump_config.dumper->curr_offset
-+ + dump_buf_pending(dump_config.dumper);
-+
-+ if (err < 0) {
-+ printk("dump_overlay_seq: failure %d in pass %d\n",
-+ err, pass);
-+ break;
-+ }
-+ printk("\n %d overlay pages %s of %d each in pass %d\n",
-+ err, save ? "saved" : "skipped", DUMP_PAGE_SIZE, pass);
-+ }
-+
-+ return err;
-+}
-+
-+/* from dump_memdev.c */
-+extern struct page *dump_mem_lookup(struct dump_memdev *dev, unsigned long loc);
-+extern struct page *dump_mem_next_page(struct dump_memdev *dev);
-+
-+static inline struct page *dump_get_saved_page(loff_t loc)
-+{
-+ return (dump_mem_lookup(dump_memdev, loc >> PAGE_SHIFT));
-+}
-+
-+static inline struct page *dump_next_saved_page(void)
-+{
-+ return (dump_mem_next_page(dump_memdev));
-+}
-+
-+/*
-+ * Iterates over list of saved dump pages. Invoked during second stage of
-+ * soft boot dumping
-+ *
-+ * Observation: If additional selection is desired at this stage then
-+ * a different iterator could be written which would advance
-+ * to the next page header everytime instead of blindly picking up
-+ * the data. In such a case loc would be interpreted differently.
-+ * At this moment however a blind pass seems sufficient, cleaner and
-+ * faster.
-+ */
-+int dump_saved_data_iterator(int pass, int (*action)(unsigned long,
-+ unsigned long), struct dump_data_filter *filter)
-+{
-+ loff_t loc = filter->start;
-+ struct page *page;
-+ unsigned long count = 0;
-+ int err = 0;
-+ unsigned long sz;
-+
-+ printk("pass %d, start off 0x%llx end offset 0x%llx\n", pass,
-+ filter->start, filter->end);
-+
-+ /* loc will get treated as logical offset into stage 1 */
-+ page = dump_get_saved_page(loc);
-+
-+ for (; loc < filter->end; loc += PAGE_SIZE) {
-+ dump_config.dumper->curr_loc = loc;
-+ if (!page) {
-+ printk("no more saved data for pass %d\n", pass);
-+ break;
-+ }
-+ sz = (loc + PAGE_SIZE > filter->end) ? filter->end - loc :
-+ PAGE_SIZE;
-+
-+ if (page && filter->selector(pass, (unsigned long)page,
-+ PAGE_SIZE)) {
-+ pr_debug("mem offset 0x%llx\n", loc);
-+ if ((err = action((unsigned long)page, sz)))
-+ break;
-+ else
-+ count++;
-+ /* clear the contents of page */
-+ /* fixme: consider using KM_DUMP instead */
-+ clear_highpage(page);
-+
-+ }
-+ page = dump_next_saved_page();
-+ }
-+
-+ return err ? err : count;
-+}
-+
-+static inline int dump_overlay_pages_done(struct page *page, int nr)
-+{
-+ int ret=0;
-+
-+ for (; nr ; page++, nr--) {
-+ if (dump_check_and_free_page(dump_memdev, page))
-+ ret++;
-+ }
-+ return ret;
-+}
-+
-+int dump_overlay_save_data(unsigned long loc, unsigned long len)
-+{
-+ int err = 0;
-+ struct page *page = (struct page *)loc;
-+ static unsigned long cnt = 0;
-+
-+ if ((err = dump_generic_save_data(loc, len)))
-+ return err;
-+
-+ if (dump_overlay_pages_done(page, len >> PAGE_SHIFT)) {
-+ cnt++;
-+ if (!(cnt & 0x7f))
-+ pr_debug("released page 0x%lx\n", page_to_pfn(page));
-+ }
-+
-+ return err;
-+}
-+
-+
-+int dump_overlay_skip_data(unsigned long loc, unsigned long len)
-+{
-+ struct page *page = (struct page *)loc;
-+
-+ dump_overlay_pages_done(page, len >> PAGE_SHIFT);
-+ return 0;
-+}
-+
-+int dump_overlay_resume(void)
-+{
-+ int err = 0;
-+
-+ /*
-+ * switch to stage 2 dumper, save dump_config_block
-+ * and then trigger a soft-boot
-+ */
-+ dumper_stage2.header_len = dump_config.dumper->header_len;
-+ dump_config.dumper = &dumper_stage2;
-+ if ((err = dump_save_config(dump_saved_config)))
-+ return err;
-+
-+ dump_dev = dump_config.dumper->dev;
-+
-+ return err;
-+ err = dump_switchover_stage(); /* plugs into soft boot mechanism */
-+ dump_config.dumper = &dumper_stage1; /* set things back */
-+ return err;
-+}
-+
-+int dump_overlay_configure(unsigned long devid)
-+{
-+ struct dump_dev *dev;
-+ struct dump_config_block *saved_config = dump_saved_config;
-+ int err = 0;
-+
-+ /* If there is a previously saved dump, write it out first */
-+ if (saved_config) {
-+ printk("Processing old dump pending writeout\n");
-+ err = dump_switchover_stage();
-+ if (err) {
-+ printk("failed to writeout saved dump\n");
-+ return err;
-+ }
-+ dump_free_mem(saved_config); /* testing only: not after boot */
-+ }
-+
-+ dev = dumper_stage2.dev = dump_config.dumper->dev;
-+ /* From here on the intermediate dump target is memory-only */
-+ dump_dev = dump_config.dumper->dev = &dump_memdev->ddev;
-+ if ((err = dump_generic_configure(0))) {
-+ printk("dump generic configure failed: err %d\n", err);
-+ return err;
-+ }
-+ /* temporary */
-+ dumper_stage2.dump_buf = dump_config.dumper->dump_buf;
-+
-+ /* Sanity check on the actual target dump device */
-+ if (!dev || (err = dev->ops->open(dev, devid))) {
-+ return err;
-+ }
-+ /* TBD: should we release the target if this is soft-boot only ? */
-+
-+ /* alloc a dump config block area to save across reboot */
-+ if (!(dump_saved_config = dump_alloc_mem(sizeof(struct
-+ dump_config_block)))) {
-+ printk("dump config block alloc failed\n");
-+ /* undo configure */
-+ dump_generic_unconfigure();
-+ return -ENOMEM;
-+ }
-+ dump_config.dump_addr = (unsigned long)dump_saved_config;
-+ printk("Dump config block of size %d set up at 0x%lx\n",
-+ sizeof(*dump_saved_config), (unsigned long)dump_saved_config);
-+ return 0;
-+}
-+
-+int dump_overlay_unconfigure(void)
-+{
-+ struct dump_dev *dev = dumper_stage2.dev;
-+ int err = 0;
-+
-+ pr_debug("dump_overlay_unconfigure\n");
-+ /* Close the secondary device */
-+ dev->ops->release(dev);
-+ pr_debug("released secondary device\n");
-+
-+ err = dump_generic_unconfigure();
-+ pr_debug("Unconfigured generic portions\n");
-+ dump_free_mem(dump_saved_config);
-+ dump_saved_config = NULL;
-+ pr_debug("Freed saved config block\n");
-+ dump_dev = dump_config.dumper->dev = dumper_stage2.dev;
-+
-+ printk("Unconfigured overlay dumper\n");
-+ return err;
-+}
-+
-+int dump_staged_unconfigure(void)
-+{
-+ int err = 0;
-+ struct dump_config_block *saved_config = dump_saved_config;
-+ struct dump_dev *dev;
-+
-+ pr_debug("dump_staged_unconfigure\n");
-+ err = dump_generic_unconfigure();
-+
-+ /* now check if there is a saved dump waiting to be written out */
-+ if (saved_config) {
-+ printk("Processing saved dump pending writeout\n");
-+ if ((err = dump_switchover_stage())) {
-+ printk("Error in commiting saved dump at 0x%lx\n",
-+ (unsigned long)saved_config);
-+ printk("Old dump may hog memory\n");
-+ } else {
-+ dump_free_mem(saved_config);
-+ pr_debug("Freed saved config block\n");
-+ }
-+ dump_saved_config = NULL;
-+ } else {
-+ dev = &dump_memdev->ddev;
-+ dev->ops->release(dev);
-+ }
-+ printk("Unconfigured second stage dumper\n");
-+
-+ return 0;
-+}
-+
-+/* ----- PASSTHRU FILTER ROUTINE --------- */
-+
-+/* transparent - passes everything through */
-+int dump_passthru_filter(int pass, unsigned long loc, unsigned long sz)
-+{
-+ return 1;
-+}
-+
-+/* ----- PASSTRU FORMAT ROUTINES ---- */
-+
-+
-+int dump_passthru_configure_header(const char *panic_str, const struct pt_regs *regs)
-+{
-+ dump_config.dumper->header_dirty++;
-+ return 0;
-+}
-+
-+/* Copies bytes of data from page(s) to the specified buffer */
-+int dump_copy_pages(void *buf, struct page *page, unsigned long sz)
-+{
-+ unsigned long len = 0, bytes;
-+ void *addr;
-+
-+ while (len < sz) {
-+ addr = kmap_atomic(page, KM_DUMP);
-+ bytes = (sz > len + PAGE_SIZE) ? PAGE_SIZE : sz - len;
-+ memcpy(buf, addr, bytes);
-+ kunmap_atomic(addr, KM_DUMP);
-+ buf += bytes;
-+ len += bytes;
-+ page++;
-+ }
-+ /* memset(dump_config.dumper->curr_buf, 0x57, len); temporary */
-+
-+ return sz - len;
-+}
-+
-+int dump_passthru_update_header(void)
-+{
-+ long len = dump_config.dumper->header_len;
-+ struct page *page;
-+ void *buf = dump_config.dumper->dump_buf;
-+ int err = 0;
-+
-+ if (!dump_config.dumper->header_dirty)
-+ return 0;
-+
-+ pr_debug("Copying header of size %ld bytes from memory\n", len);
-+ if (len > DUMP_BUFFER_SIZE)
-+ return -E2BIG;
-+
-+ page = dump_mem_lookup(dump_memdev, 0);
-+ for (; (len > 0) && page; buf += PAGE_SIZE, len -= PAGE_SIZE) {
-+ if ((err = dump_copy_pages(buf, page, PAGE_SIZE)))
-+ return err;
-+ page = dump_mem_next_page(dump_memdev);
-+ }
-+ if (len > 0) {
-+ printk("Incomplete header saved in mem\n");
-+ return -ENOENT;
-+ }
-+
-+ if ((err = dump_dev_seek(0))) {
-+ printk("Unable to seek to dump header offset\n");
-+ return err;
-+ }
-+ err = dump_ll_write(dump_config.dumper->dump_buf,
-+ buf - dump_config.dumper->dump_buf);
-+ if (err < dump_config.dumper->header_len)
-+ return (err < 0) ? err : -ENOSPC;
-+
-+ dump_config.dumper->header_dirty = 0;
-+ return 0;
-+}
-+
-+static loff_t next_dph_offset = 0;
-+
-+static int dph_valid(struct __dump_page *dph)
-+{
-+ if ((dph->dp_address & (PAGE_SIZE - 1)) || (dph->dp_flags
-+ > DUMP_DH_COMPRESSED) || (!dph->dp_flags) ||
-+ (dph->dp_size > PAGE_SIZE)) {
-+ printk("dp->address = 0x%llx, dp->size = 0x%x, dp->flag = 0x%x\n",
-+ dph->dp_address, dph->dp_size, dph->dp_flags);
-+ return 0;
-+ }
-+ return 1;
-+}
-+
-+int dump_verify_lcrash_data(void *buf, unsigned long sz)
-+{
-+ struct __dump_page *dph;
-+
-+ /* sanity check for page headers */
-+ while (next_dph_offset + sizeof(*dph) < sz) {
-+ dph = (struct __dump_page *)(buf + next_dph_offset);
-+ if (!dph_valid(dph)) {
-+ printk("Invalid page hdr at offset 0x%llx\n",
-+ next_dph_offset);
-+ return -EINVAL;
-+ }
-+ next_dph_offset += dph->dp_size + sizeof(*dph);
-+ }
-+
-+ next_dph_offset -= sz;
-+ return 0;
-+}
-+
-+/*
-+ * TBD/Later: Consider avoiding the copy by using a scatter/gather
-+ * vector representation for the dump buffer
-+ */
-+int dump_passthru_add_data(unsigned long loc, unsigned long sz)
-+{
-+ struct page *page = (struct page *)loc;
-+ void *buf = dump_config.dumper->curr_buf;
-+ int err = 0;
-+
-+ if ((err = dump_copy_pages(buf, page, sz))) {
-+ printk("dump_copy_pages failed");
-+ return err;
-+ }
-+
-+ if ((err = dump_verify_lcrash_data(buf, sz))) {
-+ printk("dump_verify_lcrash_data failed\n");
-+ printk("Invalid data for pfn 0x%lx\n", page_to_pfn(page));
-+ printk("Page flags 0x%lx\n", page->flags);
-+ printk("Page count 0x%x\n", atomic_read(&page->count));
-+ return err;
-+ }
-+
-+ dump_config.dumper->curr_buf = buf + sz;
-+
-+ return 0;
-+}
-+
-+
-+/* Stage 1 dumper: Saves compressed dump in memory and soft-boots system */
-+
-+/* Scheme to overlay saved data in memory for writeout after a soft-boot */
-+struct dump_scheme_ops dump_scheme_overlay_ops = {
-+ .configure = dump_overlay_configure,
-+ .unconfigure = dump_overlay_unconfigure,
-+ .sequencer = dump_overlay_sequencer,
-+ .iterator = dump_page_iterator,
-+ .save_data = dump_overlay_save_data,
-+ .skip_data = dump_overlay_skip_data,
-+ .write_buffer = dump_generic_write_buffer
-+};
-+
-+struct dump_scheme dump_scheme_overlay = {
-+ .name = "overlay",
-+ .ops = &dump_scheme_overlay_ops
-+};
-+
-+
-+/* Stage 1 must use a good compression scheme - default to gzip */
-+extern struct __dump_compress dump_gzip_compression;
-+
-+struct dumper dumper_stage1 = {
-+ .name = "stage1",
-+ .scheme = &dump_scheme_overlay,
-+ .fmt = &dump_fmt_lcrash,
-+ .compress = &dump_none_compression, /* needs to be gzip */
-+ .filter = dump_filter_table,
-+ .dev = NULL,
-+};
-+
-+/* Stage 2 dumper: Activated after softboot to write out saved dump to device */
-+
-+/* Formatter that transfers data as is (transparent) w/o further conversion */
-+struct dump_fmt_ops dump_fmt_passthru_ops = {
-+ .configure_header = dump_passthru_configure_header,
-+ .update_header = dump_passthru_update_header,
-+ .save_context = NULL, /* unused */
-+ .add_data = dump_passthru_add_data,
-+ .update_end_marker = dump_lcrash_update_end_marker
-+};
-+
-+struct dump_fmt dump_fmt_passthru = {
-+ .name = "passthru",
-+ .ops = &dump_fmt_passthru_ops
-+};
-+
-+/* Filter that simply passes along any data within the range (transparent)*/
-+/* Note: The start and end ranges in the table are filled in at run-time */
-+
-+extern int dump_filter_none(int pass, unsigned long loc, unsigned long sz);
-+
-+struct dump_data_filter dump_passthru_filtertable[MAX_PASSES] = {
-+{.name = "passkern", .selector = dump_passthru_filter,
-+ .level_mask = DUMP_MASK_KERN },
-+{.name = "passuser", .selector = dump_passthru_filter,
-+ .level_mask = DUMP_MASK_USED },
-+{.name = "passunused", .selector = dump_passthru_filter,
-+ .level_mask = DUMP_MASK_UNUSED },
-+{.name = "none", .selector = dump_filter_none,
-+ .level_mask = DUMP_MASK_REST }
-+};
-+
-+
-+/* Scheme to handle data staged / preserved across a soft-boot */
-+struct dump_scheme_ops dump_scheme_staged_ops = {
-+ .configure = dump_generic_configure,
-+ .unconfigure = dump_staged_unconfigure,
-+ .sequencer = dump_generic_sequencer,
-+ .iterator = dump_saved_data_iterator,
-+ .save_data = dump_generic_save_data,
-+ .skip_data = dump_generic_skip_data,
-+ .write_buffer = dump_generic_write_buffer
-+};
-+
-+struct dump_scheme dump_scheme_staged = {
-+ .name = "staged",
-+ .ops = &dump_scheme_staged_ops
-+};
-+
-+/* The stage 2 dumper comprising all these */
-+struct dumper dumper_stage2 = {
-+ .name = "stage2",
-+ .scheme = &dump_scheme_staged,
-+ .fmt = &dump_fmt_passthru,
-+ .compress = &dump_none_compression,
-+ .filter = dump_passthru_filtertable,
-+ .dev = NULL,
-+};
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_rle.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_rle.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_rle.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,175 @@
-+/*
-+ * RLE Compression functions for kernel crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sourceforge.net)
-+ * Copyright 2001 Matt D. Robinson. All rights reserved.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/* header files */
-+#include <linux/config.h>
-+#include <linux/module.h>
-+#include <linux/sched.h>
-+#include <linux/fs.h>
-+#include <linux/file.h>
-+#include <linux/init.h>
-+#include <linux/dump.h>
-+
-+/*
-+ * Name: dump_compress_rle()
-+ * Func: Compress a DUMP_PAGE_SIZE (hardware) page down to something more
-+ * reasonable, if possible. This is the same routine we use in IRIX.
-+ */
-+static u16
-+dump_compress_rle(const u8 *old, u16 oldsize, u8 *new, u16 newsize)
-+{
-+ u16 ri, wi, count = 0;
-+ u_char value = 0, cur_byte;
-+
-+ /*
-+ * If the block should happen to "compress" to larger than the
-+ * buffer size, allocate a larger one and change cur_buf_size.
-+ */
-+
-+ wi = ri = 0;
-+
-+ while (ri < oldsize) {
-+ if (!ri) {
-+ cur_byte = value = old[ri];
-+ count = 0;
-+ } else {
-+ if (count == 255) {
-+ if (wi + 3 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = 0;
-+ new[wi++] = count;
-+ new[wi++] = value;
-+ value = cur_byte = old[ri];
-+ count = 0;
-+ } else {
-+ if ((cur_byte = old[ri]) == value) {
-+ count++;
-+ } else {
-+ if (count > 1) {
-+ if (wi + 3 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = 0;
-+ new[wi++] = count;
-+ new[wi++] = value;
-+ } else if (count == 1) {
-+ if (value == 0) {
-+ if (wi + 3 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = 0;
-+ new[wi++] = 1;
-+ new[wi++] = 0;
-+ } else {
-+ if (wi + 2 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = value;
-+ new[wi++] = value;
-+ }
-+ } else { /* count == 0 */
-+ if (value == 0) {
-+ if (wi + 2 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = value;
-+ new[wi++] = value;
-+ } else {
-+ if (wi + 1 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = value;
-+ }
-+ } /* if count > 1 */
-+
-+ value = cur_byte;
-+ count = 0;
-+
-+ } /* if byte == value */
-+
-+ } /* if count == 255 */
-+
-+ } /* if ri == 0 */
-+ ri++;
-+
-+ }
-+ if (count > 1) {
-+ if (wi + 3 > oldsize) {
-+ return oldsize;
-+ }
-+ new[wi++] = 0;
-+ new[wi++] = count;
-+ new[wi++] = value;
-+ } else if (count == 1) {
-+ if (value == 0) {
-+ if (wi + 3 > oldsize)
-+ return oldsize;
-+ new[wi++] = 0;
-+ new[wi++] = 1;
-+ new[wi++] = 0;
-+ } else {
-+ if (wi + 2 > oldsize)
-+ return oldsize;
-+ new[wi++] = value;
-+ new[wi++] = value;
-+ }
-+ } else { /* count == 0 */
-+ if (value == 0) {
-+ if (wi + 2 > oldsize)
-+ return oldsize;
-+ new[wi++] = value;
-+ new[wi++] = value;
-+ } else {
-+ if (wi + 1 > oldsize)
-+ return oldsize;
-+ new[wi++] = value;
-+ }
-+ } /* if count > 1 */
-+
-+ value = cur_byte;
-+ count = 0;
-+ return wi;
-+}
-+
-+/* setup the rle compression functionality */
-+static struct __dump_compress dump_rle_compression = {
-+ .compress_type = DUMP_COMPRESS_RLE,
-+ .compress_func = dump_compress_rle,
-+ .compress_name = "RLE",
-+};
-+
-+/*
-+ * Name: dump_compress_rle_init()
-+ * Func: Initialize rle compression for dumping.
-+ */
-+static int __init
-+dump_compress_rle_init(void)
-+{
-+ dump_register_compression(&dump_rle_compression);
-+ return 0;
-+}
-+
-+/*
-+ * Name: dump_compress_rle_cleanup()
-+ * Func: Remove rle compression for dumping.
-+ */
-+static void __exit
-+dump_compress_rle_cleanup(void)
-+{
-+ dump_unregister_compression(DUMP_COMPRESS_RLE);
-+}
-+
-+/* module initialization */
-+module_init(dump_compress_rle_init);
-+module_exit(dump_compress_rle_cleanup);
-+
-+MODULE_LICENSE("GPL");
-+MODULE_AUTHOR("LKCD Development Team <lkcd-devel@lists.sourceforge.net>");
-+MODULE_DESCRIPTION("RLE compression module for crash dump driver");
-Index: linux-2.6.0-test5/drivers/dump/dump_scheme.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_scheme.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_scheme.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,357 @@
-+/*
-+ * Default single stage dump scheme methods
-+ *
-+ * Previously a part of dump_base.c
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya <suparna@in.ibm.com>
-+ * Split and rewrote LKCD dump scheme to generic dump method
-+ * interfaces
-+ * Derived from original code created by
-+ * Matt Robinson <yakker@sourceforge.net>)
-+ *
-+ * Contributions from SGI, IBM, HP, MCL, and others.
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/*
-+ * Implements the default dump scheme, i.e. single-stage gathering and
-+ * saving of dump data directly to the target device, which operates in
-+ * a push mode, where the dumping system decides what data it saves
-+ * taking into account pre-specified dump config options.
-+ *
-+ * Aside: The 2-stage dump scheme, where there is a soft-reset between
-+ * the gathering and saving phases, also reuses some of these
-+ * default routines (see dump_overlay.c)
-+ */
-+#include <linux/types.h>
-+#include <linux/kernel.h>
-+#include <linux/mm.h>
-+#include <linux/slab.h>
-+#include <linux/delay.h>
-+#include <linux/reboot.h>
-+#include <linux/nmi.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+
-+extern int panic_timeout; /* time before reboot */
-+
-+extern void dump_speedo(int);
-+
-+/* Default sequencer used during single stage dumping */
-+/* Also invoked during stage 2 of soft-boot based dumping */
-+int dump_generic_sequencer(void)
-+{
-+ struct dump_data_filter *filter = dump_config.dumper->filter;
-+ int pass = 0, err = 0, save = 0;
-+ int (*action)(unsigned long, unsigned long);
-+
-+ /*
-+ * We want to save the more critical data areas first in
-+ * case we run out of space, encounter i/o failures, or get
-+ * interrupted otherwise and have to give up midway
-+ * So, run through the passes in increasing order
-+ */
-+ for (;filter->selector; filter++, pass++)
-+ {
-+ /* Assumes passes are exclusive (even across dumpers) */
-+ /* Requires care when coding the selection functions */
-+ if ((save = filter->level_mask & dump_config.level))
-+ action = dump_save_data;
-+ else
-+ action = dump_skip_data;
-+
-+ if ((err = dump_iterator(pass, action, filter)) < 0)
-+ break;
-+
-+ printk("\n %d dump pages %s of %d each in pass %d\n",
-+ err, save ? "saved" : "skipped", DUMP_PAGE_SIZE, pass);
-+
-+ }
-+
-+ return (err < 0) ? err : 0;
-+}
-+
-+static inline struct page *dump_get_page(loff_t loc)
-+{
-+ unsigned long page_index = loc >> PAGE_SHIFT;
-+
-+ /* todo: complete this to account for ia64/discontig mem */
-+ /* todo: and to check for validity, ram page, no i/o mem etc */
-+ /* need to use pfn/physaddr equiv of kern_addr_valid */
-+ if (__dump_page_valid(page_index))
-+ return pfn_to_page(page_index);
-+ else
-+ return NULL;
-+
-+}
-+
-+/* Default iterator: for singlestage and stage 1 of soft-boot dumping */
-+/* Iterates over range of physical memory pages in DUMP_PAGE_SIZE increments */
-+int dump_page_iterator(int pass, int (*action)(unsigned long, unsigned long),
-+ struct dump_data_filter *filter)
-+{
-+ /* Todo : fix unit, type */
-+ loff_t loc;
-+ int count = 0, err = 0;
-+ struct page *page;
-+
-+ /* Todo: Add membanks code */
-+ /* TBD: Check if we need to address DUMP_PAGE_SIZE < PAGE_SIZE */
-+
-+ for (loc = filter->start; loc < filter->end; loc += DUMP_PAGE_SIZE) {
-+ dump_config.dumper->curr_loc = loc;
-+ page = dump_get_page(loc);
-+ if (page && filter->selector(pass, (unsigned long) page,
-+ DUMP_PAGE_SIZE)) {
-+ if ((err = action((unsigned long)page, DUMP_PAGE_SIZE)))
-+ {
-+ printk("dump_page_iterator: err %d for loc "
-+ "0x%llx, in pass %d\n", err, loc, pass);
-+ break;
-+ } else
-+ count++;
-+ }
-+ }
-+
-+ return err ? err : count;
-+}
-+
-+/*
-+ * Base function that saves the selected block of data in the dump
-+ * Action taken when iterator decides that data needs to be saved
-+ */
-+int dump_generic_save_data(unsigned long loc, unsigned long sz)
-+{
-+ void *buf;
-+ void *dump_buf = dump_config.dumper->dump_buf;
-+ int left, bytes, ret;
-+
-+ if ((ret = dump_add_data(loc, sz))) {
-+ return ret;
-+ }
-+ buf = dump_config.dumper->curr_buf;
-+
-+ /* If we've filled up the buffer write it out */
-+ if ((left = buf - dump_buf) >= DUMP_BUFFER_SIZE) {
-+ bytes = dump_write_buffer(dump_buf, DUMP_BUFFER_SIZE);
-+ if (bytes < DUMP_BUFFER_SIZE) {
-+ printk("dump_write_buffer failed %d\n", bytes);
-+ return bytes ? -ENOSPC : bytes;
-+ }
-+
-+ left -= bytes;
-+
-+ /* -- A few chores to do from time to time -- */
-+ dump_config.dumper->count++;
-+
-+ if (!(dump_config.dumper->count & 0x3f)) {
-+ /* Update the header every one in a while */
-+ memset((void *)dump_buf, 'b', DUMP_BUFFER_SIZE);
-+ if ((ret = dump_update_header()) < 0) {
-+ /* issue warning */
-+ return ret;
-+ }
-+ printk(".");
-+
-+ touch_nmi_watchdog();
-+ } else if (!(dump_config.dumper->count & 0x7)) {
-+ /* Show progress so the user knows we aren't hung */
-+ dump_speedo(dump_config.dumper->count >> 3);
-+ }
-+ /* Todo: Touch/Refresh watchdog */
-+
-+ /* --- Done with periodic chores -- */
-+
-+ /*
-+ * extra bit of copying to simplify verification
-+ * in the second kernel boot based scheme
-+ */
-+ memcpy(dump_buf - DUMP_PAGE_SIZE, dump_buf +
-+ DUMP_BUFFER_SIZE - DUMP_PAGE_SIZE, DUMP_PAGE_SIZE);
-+
-+ /* now adjust the leftover bits back to the top of the page */
-+ /* this case would not arise during stage 2 (passthru) */
-+ memset(dump_buf, 'z', DUMP_BUFFER_SIZE);
-+ if (left) {
-+ memcpy(dump_buf, dump_buf + DUMP_BUFFER_SIZE, left);
-+ }
-+ buf -= DUMP_BUFFER_SIZE;
-+ dump_config.dumper->curr_buf = buf;
-+ }
-+
-+ return 0;
-+}
-+
-+int dump_generic_skip_data(unsigned long loc, unsigned long sz)
-+{
-+ /* dummy by default */
-+ return 0;
-+}
-+
-+/*
-+ * Common low level routine to write a buffer to current dump device
-+ * Expects checks for space etc to have been taken care of by the caller
-+ * Operates serially at the moment for simplicity.
-+ * TBD/Todo: Consider batching for improved throughput
-+ */
-+int dump_ll_write(void *buf, unsigned long len)
-+{
-+ long transferred = 0, last_transfer = 0;
-+ int ret = 0;
-+
-+ /* make sure device is ready */
-+ while ((ret = dump_dev_ready(NULL)) == -EAGAIN);
-+ if (ret < 0) {
-+ printk("dump_dev_ready failed !err %d\n", ret);
-+ return ret;
-+ }
-+
-+ while (len) {
-+ if ((last_transfer = dump_dev_write(buf, len)) <= 0) {
-+ ret = last_transfer;
-+ printk("dump_dev_write failed !err %d\n",
-+ ret);
-+ break;
-+ }
-+ /* wait till complete */
-+ while ((ret = dump_dev_ready(buf)) == -EAGAIN)
-+ cpu_relax();
-+
-+ if (ret < 0) {
-+ printk("i/o failed !err %d\n", ret);
-+ break;
-+ }
-+
-+ len -= last_transfer;
-+ buf += last_transfer;
-+ transferred += last_transfer;
-+ }
-+ return (ret < 0) ? ret : transferred;
-+}
-+
-+/* default writeout routine for single dump device */
-+/* writes out the dump data ensuring enough space is left for the end marker */
-+int dump_generic_write_buffer(void *buf, unsigned long len)
-+{
-+ long written = 0;
-+ int err = 0;
-+
-+ /* check for space */
-+ if ((err = dump_dev_seek(dump_config.dumper->curr_offset + len +
-+ 2*DUMP_BUFFER_SIZE)) < 0) {
-+ printk("dump_write_buffer: insuff space after offset 0x%llx\n",
-+ dump_config.dumper->curr_offset);
-+ return err;
-+ }
-+ /* alignment check would happen as a side effect of this */
-+ if ((err = dump_dev_seek(dump_config.dumper->curr_offset)) < 0)
-+ return err;
-+
-+ written = dump_ll_write(buf, len);
-+
-+ /* all or none */
-+
-+ if (written < len)
-+ written = written ? -ENOSPC : written;
-+ else
-+ dump_config.dumper->curr_offset += len;
-+
-+ return written;
-+}
-+
-+int dump_generic_configure(unsigned long devid)
-+{
-+ struct dump_dev *dev = dump_config.dumper->dev;
-+ struct dump_data_filter *filter;
-+ void *buf;
-+ int ret = 0;
-+
-+ /* Allocate the dump buffer and initialize dumper state */
-+ /* Assume that we get aligned addresses */
-+ if (!(buf = dump_alloc_mem(DUMP_BUFFER_SIZE + 3 * DUMP_PAGE_SIZE)))
-+ return -ENOMEM;
-+
-+ if ((unsigned long)buf & (PAGE_SIZE - 1)) {
-+ /* sanity check for page aligned address */
-+ dump_free_mem(buf);
-+ return -ENOMEM; /* fixme: better error code */
-+ }
-+
-+ /* Initialize the rest of the fields */
-+ dump_config.dumper->dump_buf = buf + DUMP_PAGE_SIZE;
-+ dumper_reset();
-+
-+ /* Open the dump device */
-+ if (!dev)
-+ return -ENODEV;
-+
-+ if ((ret = dev->ops->open(dev, devid))) {
-+ return ret;
-+ }
-+
-+ /* Initialise the memory ranges in the dump filter */
-+ for (filter = dump_config.dumper->filter ;filter->selector; filter++) {
-+ if (!filter->start && !filter->end) {
-+ filter->start = 0;
-+ filter->end = num_physpages << PAGE_SHIFT;
-+ }
-+ }
-+
-+ return 0;
-+}
-+
-+int dump_generic_unconfigure(void)
-+{
-+ struct dump_dev *dev = dump_config.dumper->dev;
-+ void *buf = dump_config.dumper->dump_buf;
-+ int ret = 0;
-+
-+ pr_debug("Generic unconfigure\n");
-+ /* Close the dump device */
-+ if (dev && (ret = dev->ops->release(dev)))
-+ return ret;
-+
-+ printk("Closed dump device\n");
-+
-+ if (buf)
-+ dump_free_mem((buf - DUMP_PAGE_SIZE));
-+
-+ dump_config.dumper->curr_buf = dump_config.dumper->dump_buf = NULL;
-+ pr_debug("Released dump buffer\n");
-+
-+ return 0;
-+}
-+
-+
-+/* Set up the default dump scheme */
-+
-+struct dump_scheme_ops dump_scheme_singlestage_ops = {
-+ .configure = dump_generic_configure,
-+ .unconfigure = dump_generic_unconfigure,
-+ .sequencer = dump_generic_sequencer,
-+ .iterator = dump_page_iterator,
-+ .save_data = dump_generic_save_data,
-+ .skip_data = dump_generic_skip_data,
-+ .write_buffer = dump_generic_write_buffer,
-+};
-+
-+struct dump_scheme dump_scheme_singlestage = {
-+ .name = "single-stage",
-+ .ops = &dump_scheme_singlestage_ops
-+};
-+
-+/* The single stage dumper comprising all these */
-+struct dumper dumper_singlestage = {
-+ .name = "single-stage",
-+ .scheme = &dump_scheme_singlestage,
-+ .fmt = &dump_fmt_lcrash,
-+ .compress = &dump_none_compression,
-+ .filter = dump_filter_table,
-+ .dev = NULL,
-+};
-+
-Index: linux-2.6.0-test5/drivers/dump/dump_setup.c
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_setup.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_setup.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,803 @@
-+/*
-+ * Standard kernel function entry points for Linux crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sourceforge.net)
-+ * Contributions from SGI, IBM, HP, MCL, and others.
-+ *
-+ * Copyright (C) 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ * Copyright (C) 2000 - 2002 TurboLinux, Inc. All rights reserved.
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 Free Software Foundation, Inc. All rights reserved.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/*
-+ * -----------------------------------------------------------------------
-+ *
-+ * DUMP HISTORY
-+ *
-+ * This dump code goes back to SGI's first attempts at dumping system
-+ * memory on SGI systems running IRIX. A few developers at SGI needed
-+ * a way to take this system dump and analyze it, and created 'icrash',
-+ * or IRIX Crash. The mechanism (the dumps and 'icrash') were used
-+ * by support people to generate crash reports when a system failure
-+ * occurred. This was vital for large system configurations that
-+ * couldn't apply patch after patch after fix just to hope that the
-+ * problems would go away. So the system memory, along with the crash
-+ * dump analyzer, allowed support people to quickly figure out what the
-+ * problem was on the system with the crash dump.
-+ *
-+ * In comes Linux. SGI started moving towards the open source community,
-+ * and upon doing so, SGI wanted to take its support utilities into Linux
-+ * with the hopes that they would end up the in kernel and user space to
-+ * be used by SGI's customers buying SGI Linux systems. One of the first
-+ * few products to be open sourced by SGI was LKCD, or Linux Kernel Crash
-+ * Dumps. LKCD comprises of a patch to the kernel to enable system
-+ * dumping, along with 'lcrash', or Linux Crash, to analyze the system
-+ * memory dump. A few additional system scripts and kernel modifications
-+ * are also included to make the dump mechanism and dump data easier to
-+ * process and use.
-+ *
-+ * As soon as LKCD was released into the open source community, a number
-+ * of larger companies started to take advantage of it. Today, there are
-+ * many community members that contribute to LKCD, and it continues to
-+ * flourish and grow as an open source project.
-+ */
-+
-+/*
-+ * DUMP TUNABLES
-+ *
-+ * This is the list of system tunables (via /proc) that are available
-+ * for Linux systems. All the read, write, etc., functions are listed
-+ * here. Currently, there are a few different tunables for dumps:
-+ *
-+ * dump_device (used to be dumpdev):
-+ * The device for dumping the memory pages out to. This
-+ * may be set to the primary swap partition for disruptive dumps,
-+ * and must be an unused partition for non-disruptive dumps.
-+ * Todo: In the case of network dumps, this may be interpreted
-+ * as the IP address of the netdump server to connect to.
-+ *
-+ * dump_compress (used to be dump_compress_pages):
-+ * This is the flag which indicates which compression mechanism
-+ * to use. This is a BITMASK, not an index (0,1,2,4,8,16,etc.).
-+ * This is the current set of values:
-+ *
-+ * 0: DUMP_COMPRESS_NONE -- Don't compress any pages.
-+ * 1: DUMP_COMPRESS_RLE -- This uses RLE compression.
-+ * 2: DUMP_COMPRESS_GZIP -- This uses GZIP compression.
-+ *
-+ * dump_level:
-+ * The amount of effort the dump module should make to save
-+ * information for post crash analysis. This value is now
-+ * a BITMASK value, not an index:
-+ *
-+ * 0: Do nothing, no dumping. (DUMP_LEVEL_NONE)
-+ *
-+ * 1: Print out the dump information to the dump header, and
-+ * write it out to the dump_device. (DUMP_LEVEL_HEADER)
-+ *
-+ * 2: Write out the dump header and all kernel memory pages.
-+ * (DUMP_LEVEL_KERN)
-+ *
-+ * 4: Write out the dump header and all kernel and user
-+ * memory pages. (DUMP_LEVEL_USED)
-+ *
-+ * 8: Write out the dump header and all conventional/cached
-+ * memory (RAM) pages in the system (kernel, user, free).
-+ * (DUMP_LEVEL_ALL_RAM)
-+ *
-+ * 16: Write out everything, including non-conventional memory
-+ * like firmware, proms, I/O registers, uncached memory.
-+ * (DUMP_LEVEL_ALL)
-+ *
-+ * The dump_level will default to 1.
-+ *
-+ * dump_flags:
-+ * These are the flags to use when talking about dumps. There
-+ * are lots of possibilities. This is a BITMASK value, not an index.
-+ *
-+ * -----------------------------------------------------------------------
-+ */
-+
-+#include <linux/kernel.h>
-+#include <linux/delay.h>
-+#include <linux/reboot.h>
-+#include <linux/fs.h>
-+#include <linux/dump.h>
-+#include "dump_methods.h"
-+#include <linux/proc_fs.h>
-+#include <linux/module.h>
-+#include <linux/utsname.h>
-+#include <linux/highmem.h>
-+#include <linux/major.h>
-+#include <linux/sysrq.h>
-+#include <linux/sysctl.h>
-+#include <linux/nmi.h>
-+
-+#include <asm/hardirq.h>
-+#include <asm/uaccess.h>
-+
-+/*
-+ * -----------------------------------------------------------------------
-+ * V A R I A B L E S
-+ * -----------------------------------------------------------------------
-+ */
-+
-+/* Dump tunables */
-+struct dump_config dump_config = {
-+ .level = 0,
-+ .flags = 0,
-+ .dump_device = 0,
-+ .dump_addr = 0,
-+ .dumper = NULL
-+};
-+
-+
-+/* Global variables used in dump.h */
-+/* degree of system freeze when dumping */
-+enum dump_silence_levels dump_silence_level = DUMP_HARD_SPIN_CPUS;
-+
-+/* Other global fields */
-+extern struct __dump_header dump_header;
-+struct dump_dev *dump_dev = NULL; /* Active dump device */
-+static int dump_compress = 0;
-+
-+static u16 dump_compress_none(const u8 *old, u16 oldsize, u8 *new, u16 newsize);
-+struct __dump_compress dump_none_compression = {
-+ .compress_type = DUMP_COMPRESS_NONE,
-+ .compress_func = dump_compress_none,
-+ .compress_name = "none",
-+};
-+
-+/* our device operations and functions */
-+static int dump_ioctl(struct inode *i, struct file *f,
-+ unsigned int cmd, unsigned long arg);
-+
-+static struct file_operations dump_fops = {
-+ .ioctl = dump_ioctl,
-+};
-+
-+/* static variables */
-+static int dump_okay = 0; /* can we dump out to disk? */
-+static spinlock_t dump_lock = SPIN_LOCK_UNLOCKED;
-+
-+/* used for dump compressors */
-+static struct list_head dump_compress_list = LIST_HEAD_INIT(dump_compress_list);
-+
-+/* list of registered dump targets */
-+static struct list_head dump_target_list = LIST_HEAD_INIT(dump_target_list);
-+
-+/* lkcd info structure -- this is used by lcrash for basic system data */
-+struct __lkcdinfo lkcdinfo = {
-+ .ptrsz = (sizeof(void *) * 8),
-+#if defined(__LITTLE_ENDIAN)
-+ .byte_order = __LITTLE_ENDIAN,
-+#else
-+ .byte_order = __BIG_ENDIAN,
-+#endif
-+ .page_shift = PAGE_SHIFT,
-+ .page_size = PAGE_SIZE,
-+ .page_mask = PAGE_MASK,
-+ .page_offset = PAGE_OFFSET,
-+};
-+
-+/*
-+ * -----------------------------------------------------------------------
-+ * / P R O C T U N A B L E F U N C T I O N S
-+ * -----------------------------------------------------------------------
-+ */
-+
-+static int proc_dump_device(ctl_table *ctl, int write, struct file *f,
-+ void *buffer, size_t *lenp);
-+
-+static int proc_doulonghex(ctl_table *ctl, int write, struct file *f,
-+ void *buffer, size_t *lenp);
-+/*
-+ * sysctl-tuning infrastructure.
-+ */
-+static ctl_table dump_table[] = {
-+ { .ctl_name = CTL_DUMP_LEVEL,
-+ .procname = DUMP_LEVEL_NAME,
-+ .data = &dump_config.level,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_doulonghex, },
-+
-+ { .ctl_name = CTL_DUMP_FLAGS,
-+ .procname = DUMP_FLAGS_NAME,
-+ .data = &dump_config.flags,
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_doulonghex, },
-+
-+ { .ctl_name = CTL_DUMP_COMPRESS,
-+ .procname = DUMP_COMPRESS_NAME,
-+ .data = &dump_compress, /* FIXME */
-+ .maxlen = sizeof(int),
-+ .mode = 0644,
-+ .proc_handler = proc_dointvec, },
-+
-+ { .ctl_name = CTL_DUMP_DEVICE,
-+ .procname = DUMP_DEVICE_NAME,
-+ .mode = 0644,
-+ .data = &dump_config.dump_device, /* FIXME */
-+ .maxlen = sizeof(int),
-+ .proc_handler = proc_dump_device },
-+
-+#ifdef CONFIG_CRASH_DUMP_MEMDEV
-+ { .ctl_name = CTL_DUMP_ADDR,
-+ .procname = DUMP_ADDR_NAME,
-+ .mode = 0444,
-+ .data = &dump_config.dump_addr,
-+ .maxlen = sizeof(unsigned long),
-+ .proc_handler = proc_doulonghex },
-+#endif
-+
-+ { 0, }
-+};
-+
-+static ctl_table dump_root[] = {
-+ { .ctl_name = KERN_DUMP,
-+ .procname = "dump",
-+ .mode = 0555,
-+ .child = dump_table },
-+ { 0, }
-+};
-+
-+static ctl_table kernel_root[] = {
-+ { .ctl_name = CTL_KERN,
-+ .procname = "kernel",
-+ .mode = 0555,
-+ .child = dump_root, },
-+ { 0, }
-+};
-+
-+static struct ctl_table_header *sysctl_header;
-+
-+/*
-+ * -----------------------------------------------------------------------
-+ * C O M P R E S S I O N F U N C T I O N S
-+ * -----------------------------------------------------------------------
-+ */
-+
-+/*
-+ * Name: dump_compress_none()
-+ * Func: Don't do any compression, period.
-+ */
-+static u16
-+dump_compress_none(const u8 *old, u16 oldsize, u8 *new, u16 newsize)
-+{
-+ /* just return the old size */
-+ return oldsize;
-+}
-+
-+
-+/*
-+ * Name: dump_execute()
-+ * Func: Execute the dumping process. This makes sure all the appropriate
-+ * fields are updated correctly, and calls dump_execute_memdump(),
-+ * which does the real work.
-+ */
-+void
-+dump_execute(const char *panic_str, const struct pt_regs *regs)
-+{
-+ int state = -1;
-+ unsigned long flags;
-+
-+ /* make sure we can dump */
-+ if (!dump_okay) {
-+ pr_info("LKCD not yet configured, can't take dump now\n");
-+ return;
-+ }
-+
-+ /* Exclude multiple dumps at the same time,
-+ * and disable interrupts, some drivers may re-enable
-+ * interrupts in with silence()
-+ *
-+ * Try and acquire spin lock. If successful, leave preempt
-+ * and interrupts disabled. See spin_lock_irqsave in spinlock.h
-+ */
-+ local_irq_save(flags);
-+ if (!spin_trylock(&dump_lock)) {
-+ local_irq_restore(flags);
-+ pr_info("LKCD dump already in progress\n");
-+ return;
-+ }
-+
-+ /* Bring system into the strictest level of quiescing for min drift
-+ * dump drivers can soften this as required in dev->ops->silence()
-+ */
-+ dump_oncpu = smp_processor_id() + 1;
-+ dump_silence_level = DUMP_HARD_SPIN_CPUS;
-+
-+ state = dump_generic_execute(panic_str, regs);
-+
-+ dump_oncpu = 0;
-+ spin_unlock_irqrestore(&dump_lock, flags);
-+
-+ if (state < 0) {
-+ printk("Dump Incomplete or failed!\n");
-+ } else {
-+ printk("Dump Complete; %d dump pages saved.\n",
-+ dump_header.dh_num_dump_pages);
-+ }
-+}
-+
-+/*
-+ * Name: dump_register_compression()
-+ * Func: Register a dump compression mechanism.
-+ */
-+void
-+dump_register_compression(struct __dump_compress *item)
-+{
-+ if (item)
-+ list_add(&(item->list), &dump_compress_list);
-+}
-+
-+/*
-+ * Name: dump_unregister_compression()
-+ * Func: Remove a dump compression mechanism, and re-assign the dump
-+ * compression pointer if necessary.
-+ */
-+void
-+dump_unregister_compression(int compression_type)
-+{
-+ struct list_head *tmp;
-+ struct __dump_compress *dc;
-+
-+ /* let's make sure our list is valid */
-+ if (compression_type != DUMP_COMPRESS_NONE) {
-+ list_for_each(tmp, &dump_compress_list) {
-+ dc = list_entry(tmp, struct __dump_compress, list);
-+ if (dc->compress_type == compression_type) {
-+ list_del(&(dc->list));
-+ break;
-+ }
-+ }
-+ }
-+}
-+
-+/*
-+ * Name: dump_compress_init()
-+ * Func: Initialize (or re-initialize) compression scheme.
-+ */
-+static int
-+dump_compress_init(int compression_type)
-+{
-+ struct list_head *tmp;
-+ struct __dump_compress *dc;
-+
-+ /* try to remove the compression item */
-+ list_for_each(tmp, &dump_compress_list) {
-+ dc = list_entry(tmp, struct __dump_compress, list);
-+ if (dc->compress_type == compression_type) {
-+ dump_config.dumper->compress = dc;
-+ dump_compress = compression_type;
-+ pr_debug("Dump Compress %s\n", dc->compress_name);
-+ return 0;
-+ }
-+ }
-+
-+ /*
-+ * nothing on the list -- return ENODATA to indicate an error
-+ *
-+ * NB:
-+ * EAGAIN: reports "Resource temporarily unavailable" which
-+ * isn't very enlightening.
-+ */
-+ printk("compression_type:%d not found\n", compression_type);
-+
-+ return -ENODATA;
-+}
-+
-+static int
-+dumper_setup(unsigned long flags, unsigned long devid)
-+{
-+ int ret = 0;
-+
-+ /* unconfigure old dumper if it exists */
-+ dump_okay = 0;
-+ if (dump_config.dumper) {
-+ pr_debug("Unconfiguring current dumper\n");
-+ dump_unconfigure();
-+ }
-+ /* set up new dumper */
-+ if (dump_config.flags & DUMP_FLAGS_SOFTBOOT) {
-+ printk("Configuring softboot based dump \n");
-+#ifdef CONFIG_CRASH_DUMP_MEMDEV
-+ dump_config.dumper = &dumper_stage1;
-+#else
-+ printk("Requires CONFIG_CRASHDUMP_MEMDEV. Can't proceed.\n");
-+ return -1;
-+#endif
-+ } else {
-+ dump_config.dumper = &dumper_singlestage;
-+ }
-+ dump_config.dumper->dev = dump_dev;
-+
-+ ret = dump_configure(devid);
-+ if (!ret) {
-+ dump_okay = 1;
-+ pr_debug("%s dumper set up for dev 0x%lx\n",
-+ dump_config.dumper->name, devid);
-+ dump_config.dump_device = devid;
-+ } else {
-+ printk("%s dumper set up failed for dev 0x%lx\n",
-+ dump_config.dumper->name, devid);
-+ dump_config.dumper = NULL;
-+ }
-+ return ret;
-+}
-+
-+static int
-+dump_target_init(int target)
-+{
-+ char type[20];
-+ struct list_head *tmp;
-+ struct dump_dev *dev;
-+
-+ switch (target) {
-+ case DUMP_FLAGS_DISKDUMP:
-+ strcpy(type, "blockdev"); break;
-+ case DUMP_FLAGS_NETDUMP:
-+ strcpy(type, "networkdev"); break;
-+ default:
-+ return -1;
-+ }
-+
-+ /*
-+ * This is a bit stupid, generating strings from flag
-+ * and doing strcmp. This is done because 'struct dump_dev'
-+ * has string 'type_name' and not interger 'type'.
-+ */
-+ list_for_each(tmp, &dump_target_list) {
-+ dev = list_entry(tmp, struct dump_dev, list);
-+ if (strcmp(type, dev->type_name) == 0) {
-+ dump_dev = dev;
-+ return 0;
-+ }
-+ }
-+ return -1;
-+}
-+
-+/*
-+ * Name: dump_ioctl()
-+ * Func: Allow all dump tunables through a standard ioctl() mechanism.
-+ * This is far better than before, where we'd go through /proc,
-+ * because now this will work for multiple OS and architectures.
-+ */
-+static int
-+dump_ioctl(struct inode *i, struct file *f, unsigned int cmd, unsigned long arg)
-+{
-+ /* check capabilities */
-+ if (!capable(CAP_SYS_ADMIN))
-+ return -EPERM;
-+
-+ if (!dump_config.dumper && cmd == DIOSDUMPCOMPRESS)
-+ /* dump device must be configured first */
-+ return -ENODEV;
-+
-+ /*
-+ * This is the main mechanism for controlling get/set data
-+ * for various dump device parameters. The real trick here
-+ * is setting the dump device (DIOSDUMPDEV). That's what
-+ * triggers everything else.
-+ */
-+ switch (cmd) {
-+ case DIOSDUMPDEV: /* set dump_device */
-+ pr_debug("Configuring dump device\n");
-+ if (!(f->f_flags & O_RDWR))
-+ return -EPERM;
-+
-+ __dump_open();
-+ return dumper_setup(dump_config.flags, arg);
-+
-+
-+ case DIOGDUMPDEV: /* get dump_device */
-+ return put_user((long)dump_config.dump_device, (long *)arg);
-+
-+ case DIOSDUMPLEVEL: /* set dump_level */
-+ if (!(f->f_flags & O_RDWR))
-+ return -EPERM;
-+
-+ /* make sure we have a positive value */
-+ if (arg < 0)
-+ return -EINVAL;
-+
-+ /* Fixme: clean this up */
-+ dump_config.level = 0;
-+ switch ((int)arg) {
-+ case DUMP_LEVEL_ALL:
-+ case DUMP_LEVEL_ALL_RAM:
-+ dump_config.level |= DUMP_MASK_UNUSED;
-+ case DUMP_LEVEL_USED:
-+ dump_config.level |= DUMP_MASK_USED;
-+ case DUMP_LEVEL_KERN:
-+ dump_config.level |= DUMP_MASK_KERN;
-+ case DUMP_LEVEL_HEADER:
-+ dump_config.level |= DUMP_MASK_HEADER;
-+ case DUMP_LEVEL_NONE:
-+ break;
-+ default:
-+ return (-EINVAL);
-+ }
-+ pr_debug("Dump Level 0x%lx\n", dump_config.level);
-+ break;
-+
-+ case DIOGDUMPLEVEL: /* get dump_level */
-+ /* fixme: handle conversion */
-+ return put_user((long)dump_config.level, (long *)arg);
-+
-+
-+ case DIOSDUMPFLAGS: /* set dump_flags */
-+ /* check flags */
-+ if (!(f->f_flags & O_RDWR))
-+ return -EPERM;
-+
-+ /* make sure we have a positive value */
-+ if (arg < 0)
-+ return -EINVAL;
-+
-+ if (dump_target_init(arg & DUMP_FLAGS_TARGETMASK) < 0)
-+ return -EINVAL; /* return proper error */
-+
-+ dump_config.flags = arg;
-+
-+ pr_debug("Dump Flags 0x%lx\n", dump_config.flags);
-+ break;
-+
-+ case DIOGDUMPFLAGS: /* get dump_flags */
-+ return put_user((long)dump_config.flags, (long *)arg);
-+
-+ case DIOSDUMPCOMPRESS: /* set the dump_compress status */
-+ if (!(f->f_flags & O_RDWR))
-+ return -EPERM;
-+
-+ return dump_compress_init((int)arg);
-+
-+ case DIOGDUMPCOMPRESS: /* get the dump_compress status */
-+ return put_user((long)(dump_config.dumper ?
-+ dump_config.dumper->compress->compress_type : 0),
-+ (long *)arg);
-+
-+ default:
-+ /*
-+ * these are network dump specific ioctls, let the
-+ * module handle them.
-+ */
-+ return dump_dev_ioctl(cmd, arg);
-+ }
-+ return 0;
-+}
-+
-+/*
-+ * Handle special cases for dump_device
-+ * changing dump device requires doing an opening the device
-+ */
-+static int
-+proc_dump_device(ctl_table *ctl, int write, struct file *f,
-+ void *buffer, size_t *lenp)
-+{
-+ int *valp = ctl->data;
-+ int oval = *valp;
-+ int ret = -EPERM;
-+
-+ /* same permission checks as ioctl */
-+ if (capable(CAP_SYS_ADMIN)) {
-+ ret = proc_doulonghex(ctl, write, f, buffer, lenp);
-+ if (ret == 0 && write && *valp != oval) {
-+ /* need to restore old value to close properly */
-+ dump_config.dump_device = (dev_t) oval;
-+ __dump_open();
-+ ret = dumper_setup(dump_config.flags, (dev_t) *valp);
-+ }
-+ }
-+
-+ return ret;
-+}
-+
-+/* All for the want of a proc_do_xxx routine which prints values in hex */
-+static int
-+proc_doulonghex(ctl_table *ctl, int write, struct file *f,
-+ void *buffer, size_t *lenp)
-+{
-+#define TMPBUFLEN 20
-+ unsigned long *i;
-+ size_t len, left;
-+ char buf[TMPBUFLEN];
-+
-+ if (!ctl->data || !ctl->maxlen || !*lenp || (f->f_pos)) {
-+ *lenp = 0;
-+ return 0;
-+ }
-+
-+ i = (unsigned long *) ctl->data;
-+ left = *lenp;
-+
-+ sprintf(buf, "0x%lx\n", (*i));
-+ len = strlen(buf);
-+ if (len > left)
-+ len = left;
-+ if(copy_to_user(buffer, buf, len))
-+ return -EFAULT;
-+
-+ left -= len;
-+ *lenp -= left;
-+ f->f_pos += *lenp;
-+ return 0;
-+}
-+
-+/*
-+ * -----------------------------------------------------------------------
-+ * I N I T F U N C T I O N S
-+ * -----------------------------------------------------------------------
-+ */
-+
-+/*
-+ * These register and unregister routines are exported for modules
-+ * to register their dump drivers (like block, net etc)
-+ */
-+int
-+dump_register_device(struct dump_dev *ddev)
-+{
-+ struct list_head *tmp;
-+ struct dump_dev *dev;
-+
-+ list_for_each(tmp, &dump_target_list) {
-+ dev = list_entry(tmp, struct dump_dev, list);
-+ if (strcmp(ddev->type_name, dev->type_name) == 0) {
-+ printk("Target type %s already registered\n",
-+ dev->type_name);
-+ return -1; /* return proper error */
-+ }
-+ }
-+ list_add(&(ddev->list), &dump_target_list);
-+
-+ return 0;
-+}
-+
-+void
-+dump_unregister_device(struct dump_dev *ddev)
-+{
-+ list_del(&(ddev->list));
-+ if (ddev != dump_dev)
-+ return;
-+
-+ dump_okay = 0;
-+
-+ if (dump_config.dumper)
-+ dump_unconfigure();
-+
-+ dump_config.flags &= ~DUMP_FLAGS_TARGETMASK;
-+ dump_okay = 0;
-+ dump_dev = NULL;
-+ dump_config.dumper = NULL;
-+}
-+
-+static int panic_event(struct notifier_block *this, unsigned long event,
-+ void *ptr)
-+{
-+ struct pt_regs regs;
-+
-+ get_current_regs(®s);
-+ dump_execute((const char *)ptr, ®s);
-+ return 0;
-+}
-+
-+extern struct notifier_block *panic_notifier_list;
-+static int panic_event(struct notifier_block *, unsigned long, void *);
-+static struct notifier_block panic_block = {
-+ .notifier_call = panic_event,
-+};
-+
-+#ifdef CONFIG_MAGIC_SYSRQ
-+/* Sysrq handler */
-+static void sysrq_handle_crashdump(int key, struct pt_regs *pt_regs,
-+ struct tty_struct *tty) {
-+ dump_execute("sysrq", pt_regs);
-+}
-+
-+static struct sysrq_key_op sysrq_crashdump_op = {
-+ .handler = sysrq_handle_crashdump,
-+ .help_msg = "Dump",
-+ .action_msg = "Starting crash dump",
-+};
-+#endif
-+
-+static inline void
-+dump_sysrq_register(void)
-+{
-+#ifdef CONFIG_MAGIC_SYSRQ
-+ __sysrq_lock_table();
-+ __sysrq_put_key_op(DUMP_SYSRQ_KEY, &sysrq_crashdump_op);
-+ __sysrq_unlock_table();
-+#endif
-+}
-+
-+static inline void
-+dump_sysrq_unregister(void)
-+{
-+#ifdef CONFIG_MAGIC_SYSRQ
-+ __sysrq_lock_table();
-+ if (__sysrq_get_key_op(DUMP_SYSRQ_KEY) == &sysrq_crashdump_op)
-+ __sysrq_put_key_op(DUMP_SYSRQ_KEY, NULL);
-+ __sysrq_unlock_table();
-+#endif
-+}
-+
-+/*
-+ * Name: dump_init()
-+ * Func: Initialize the dump process. This will set up any architecture
-+ * dependent code. The big key is we need the memory offsets before
-+ * the page table is initialized, because the base memory offset
-+ * is changed after paging_init() is called.
-+ */
-+static int __init
-+dump_init(void)
-+{
-+ struct sysinfo info;
-+
-+ /* try to create our dump device */
-+ if (register_chrdev(CRASH_DUMP_MAJOR, "dump", &dump_fops)) {
-+ printk("cannot register dump character device!\n");
-+ return -EBUSY;
-+ }
-+
-+ __dump_init((u64)PAGE_OFFSET);
-+
-+ /* set the dump_compression_list structure up */
-+ dump_register_compression(&dump_none_compression);
-+
-+ /* grab the total memory size now (not if/when we crash) */
-+ si_meminfo(&info);
-+
-+ /* set the memory size */
-+ dump_header.dh_memory_size = (u64)info.totalram;
-+
-+ sysctl_header = register_sysctl_table(kernel_root, 0);
-+ dump_sysrq_register();
-+
-+ notifier_chain_register(&panic_notifier_list, &panic_block);
-+ dump_function_ptr = dump_execute;
-+
-+ pr_info("Crash dump driver initialized.\n");
-+ return 0;
-+}
-+
-+static void __exit
-+dump_cleanup(void)
-+{
-+ dump_okay = 0;
-+
-+ if (dump_config.dumper)
-+ dump_unconfigure();
-+
-+ /* arch-specific cleanup routine */
-+ __dump_cleanup();
-+
-+ /* ignore errors while unregistering -- since can't do anything */
-+ unregister_sysctl_table(sysctl_header);
-+ unregister_chrdev(CRASH_DUMP_MAJOR, "dump");
-+ dump_sysrq_unregister();
-+ notifier_chain_unregister(&panic_notifier_list, &panic_block);
-+ dump_function_ptr = NULL;
-+}
-+
-+EXPORT_SYMBOL(dump_register_compression);
-+EXPORT_SYMBOL(dump_unregister_compression);
-+EXPORT_SYMBOL(dump_register_device);
-+EXPORT_SYMBOL(dump_unregister_device);
-+EXPORT_SYMBOL(dump_config);
-+EXPORT_SYMBOL(dump_silence_level);
-+
-+EXPORT_SYMBOL(__dump_irq_enable);
-+EXPORT_SYMBOL(__dump_irq_restore);
-+
-+MODULE_AUTHOR("Matt D. Robinson <yakker@sourceforge.net>");
-+MODULE_DESCRIPTION("Linux Kernel Crash Dump (LKCD) driver");
-+MODULE_LICENSE("GPL");
-+
-+module_init(dump_init);
-+module_exit(dump_cleanup);
-Index: linux-2.6.0-test5/include/linux/dumpdev.h
-===================================================================
---- linux-2.6.0-test5.orig/include/linux/dumpdev.h 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/include/linux/dumpdev.h 2003-09-26 14:27:08.000000000 +0800
-@@ -0,0 +1,161 @@
-+/*
-+ * Generic dump device interfaces for flexible system dump
-+ * (Enables variation of dump target types e.g disk, network, memory)
-+ *
-+ * These interfaces have evolved based on discussions on lkcd-devel.
-+ * Eventually the intent is to support primary and secondary or
-+ * alternate targets registered at the same time, with scope for
-+ * situation based failover or multiple dump devices used for parallel
-+ * dump i/o.
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya (suparna@in.ibm.com)
-+ *
-+ * Copyright (C) 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#ifndef _LINUX_DUMPDEV_H
-+#define _LINUX_DUMPDEV_H
-+
-+#include <linux/kernel.h>
-+#include <linux/wait.h>
-+#include <linux/bio.h>
-+
-+/* Determined by the dump target (device) type */
-+
-+struct dump_dev;
-+
-+struct dump_dev_ops {
-+ int (*open)(struct dump_dev *, unsigned long); /* configure */
-+ int (*release)(struct dump_dev *); /* unconfigure */
-+ int (*silence)(struct dump_dev *); /* when dump starts */
-+ int (*resume)(struct dump_dev *); /* when dump is over */
-+ int (*seek)(struct dump_dev *, loff_t);
-+ /* trigger a write (async in nature typically) */
-+ int (*write)(struct dump_dev *, void *, unsigned long);
-+ /* not usually used during dump, but option available */
-+ int (*read)(struct dump_dev *, void *, unsigned long);
-+ /* use to poll for completion */
-+ int (*ready)(struct dump_dev *, void *);
-+ int (*ioctl)(struct dump_dev *, unsigned int, unsigned long);
-+};
-+
-+struct dump_dev {
-+ char type_name[32]; /* block, net-poll etc */
-+ unsigned long device_id; /* interpreted differently for various types */
-+ struct dump_dev_ops *ops;
-+ struct list_head list;
-+ loff_t curr_offset;
-+};
-+
-+/*
-+ * dump_dev type variations:
-+ */
-+
-+/* block */
-+struct dump_blockdev {
-+ struct dump_dev ddev;
-+ dev_t kdev_id;
-+ struct block_device *bdev;
-+ struct bio *bio;
-+ loff_t start_offset;
-+ loff_t limit;
-+ int err;
-+};
-+
-+static inline struct dump_blockdev *DUMP_BDEV(struct dump_dev *dev)
-+{
-+ return container_of(dev, struct dump_blockdev, ddev);
-+}
-+
-+
-+/* mem - for internal use by soft-boot based dumper */
-+struct dump_memdev {
-+ struct dump_dev ddev;
-+ unsigned long indirect_map_root;
-+ unsigned long nr_free;
-+ struct page *curr_page;
-+ unsigned long *curr_map;
-+ unsigned long curr_map_offset;
-+ unsigned long last_offset;
-+ unsigned long last_used_offset;
-+ unsigned long last_bs_offset;
-+};
-+
-+static inline struct dump_memdev *DUMP_MDEV(struct dump_dev *dev)
-+{
-+ return container_of(dev, struct dump_memdev, ddev);
-+}
-+
-+/* Todo/future - meant for raw dedicated interfaces e.g. mini-ide driver */
-+struct dump_rdev {
-+ struct dump_dev ddev;
-+ char name[32];
-+ int (*reset)(struct dump_rdev *, unsigned int,
-+ unsigned long);
-+ /* ... to do ... */
-+};
-+
-+/* just to get the size right when saving config across a soft-reboot */
-+struct dump_anydev {
-+ union {
-+ struct dump_blockdev bddev;
-+ /* .. add other types here .. */
-+ };
-+};
-+
-+
-+
-+/* Dump device / target operation wrappers */
-+/* These assume that dump_dev is initiatized to dump_config.dumper->dev */
-+
-+extern struct dump_dev *dump_dev;
-+
-+static inline int dump_dev_open(unsigned long arg)
-+{
-+ return dump_dev->ops->open(dump_dev, arg);
-+}
-+
-+static inline int dump_dev_release(void)
-+{
-+ return dump_dev->ops->release(dump_dev);
-+}
-+
-+static inline int dump_dev_silence(void)
-+{
-+ return dump_dev->ops->silence(dump_dev);
-+}
-+
-+static inline int dump_dev_resume(void)
-+{
-+ return dump_dev->ops->resume(dump_dev);
-+}
-+
-+static inline int dump_dev_seek(loff_t offset)
-+{
-+ return dump_dev->ops->seek(dump_dev, offset);
-+}
-+
-+static inline int dump_dev_write(void *buf, unsigned long len)
-+{
-+ return dump_dev->ops->write(dump_dev, buf, len);
-+}
-+
-+static inline int dump_dev_ready(void *buf)
-+{
-+ return dump_dev->ops->ready(dump_dev, buf);
-+}
-+
-+static inline int dump_dev_ioctl(unsigned int cmd, unsigned long arg)
-+{
-+ if (!dump_dev->ops->ioctl)
-+ return -EINVAL;
-+ return dump_dev->ops->ioctl(dump_dev, cmd, arg);
-+}
-+
-+extern int dump_register_device(struct dump_dev *);
-+extern void dump_unregister_device(struct dump_dev *);
-+
-+#endif /* _LINUX_DUMPDEV_H */
-Index: linux-2.6.0-test5/include/linux/dump.h
-===================================================================
---- linux-2.6.0-test5.orig/include/linux/dump.h 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/include/linux/dump.h 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,376 @@
-+/*
-+ * Kernel header file for Linux crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sgi.com)
-+ * Copyright 1999 - 2002 Silicon Graphics, Inc. All rights reserved.
-+ *
-+ * vmdump.h to dump.h by: Matt D. Robinson (yakker@sourceforge.net)
-+ * Copyright 2001 - 2002 Matt D. Robinson. All rights reserved.
-+ * Copyright (C) 2002 Free Software Foundation, Inc. All rights reserved.
-+ *
-+ * Most of this is the same old stuff from vmdump.h, except now we're
-+ * actually a stand-alone driver plugged into the block layer interface,
-+ * with the exception that we now allow for compression modes externally
-+ * loaded (e.g., someone can come up with their own).
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/* This header file includes all structure definitions for crash dumps. */
-+#ifndef _DUMP_H
-+#define _DUMP_H
-+
-+#if defined(CONFIG_CRASH_DUMP) || defined (CONFIG_CRASH_DUMP_MODULE)
-+
-+#include <linux/list.h>
-+#include <linux/notifier.h>
-+#include <linux/dumpdev.h>
-+
-+/*
-+ * Predefine default DUMP_PAGE constants, asm header may override.
-+ *
-+ * On ia64 discontinuous memory systems it's possible for the memory
-+ * banks to stop at 2**12 page alignments, the smallest possible page
-+ * size. But the system page size, PAGE_SIZE, is in fact larger.
-+ */
-+#define DUMP_PAGE_SHIFT PAGE_SHIFT
-+#define DUMP_PAGE_MASK PAGE_MASK
-+#define DUMP_PAGE_ALIGN(addr) PAGE_ALIGN(addr)
-+#define DUMP_HEADER_OFFSET PAGE_SIZE
-+
-+/* keep DUMP_PAGE_SIZE constant to 4K = 1<<12
-+ * it may be different from PAGE_SIZE then.
-+ */
-+#define DUMP_PAGE_SIZE 4096
-+
-+/*
-+ * Predefined default memcpy() to use when copying memory to the dump buffer.
-+ *
-+ * On ia64 there is a heads up function that can be called to let the prom
-+ * machine check monitor know that the current activity is risky and it should
-+ * ignore the fault (nofault). In this case the ia64 header will redefine this
-+ * macro to __dump_memcpy() and use it's arch specific version.
-+ */
-+#define DUMP_memcpy memcpy
-+
-+/* necessary header files */
-+#include <asm/dump.h> /* for architecture-specific header */
-+
-+/*
-+ * Size of the buffer that's used to hold:
-+ *
-+ * 1. the dump header (padded to fill the complete buffer)
-+ * 2. the possibly compressed page headers and data
-+ */
-+#define DUMP_BUFFER_SIZE (64 * 1024) /* size of dump buffer */
-+#define DUMP_HEADER_SIZE DUMP_BUFFER_SIZE
-+
-+/* standard header definitions */
-+#define DUMP_MAGIC_NUMBER 0xa8190173618f23edULL /* dump magic number */
-+#define DUMP_MAGIC_LIVE 0xa8190173618f23cdULL /* live magic number */
-+#define DUMP_VERSION_NUMBER 0x8 /* dump version number */
-+#define DUMP_PANIC_LEN 0x100 /* dump panic string length */
-+
-+/* dump levels - type specific stuff added later -- add as necessary */
-+#define DUMP_LEVEL_NONE 0x0 /* no dumping at all -- just bail */
-+#define DUMP_LEVEL_HEADER 0x1 /* kernel dump header only */
-+#define DUMP_LEVEL_KERN 0x2 /* dump header and kernel pages */
-+#define DUMP_LEVEL_USED 0x4 /* dump header, kernel/user pages */
-+#define DUMP_LEVEL_ALL_RAM 0x8 /* dump header, all RAM pages */
-+#define DUMP_LEVEL_ALL 0x10 /* dump all memory RAM and firmware */
-+
-+
-+/* dump compression options -- add as necessary */
-+#define DUMP_COMPRESS_NONE 0x0 /* don't compress this dump */
-+#define DUMP_COMPRESS_RLE 0x1 /* use RLE compression */
-+#define DUMP_COMPRESS_GZIP 0x2 /* use GZIP compression */
-+
-+/* dump flags - any dump-type specific flags -- add as necessary */
-+#define DUMP_FLAGS_NONE 0x0 /* no flags are set for this dump */
-+#define DUMP_FLAGS_SOFTBOOT 0x2 /* 2 stage soft-boot based dump */
-+
-+#define DUMP_FLAGS_TARGETMASK 0xf0000000 /* handle special case targets */
-+#define DUMP_FLAGS_DISKDUMP 0x80000000 /* dump to local disk */
-+#define DUMP_FLAGS_NETDUMP 0x40000000 /* dump over the network */
-+
-+/* dump header flags -- add as necessary */
-+#define DUMP_DH_FLAGS_NONE 0x0 /* no flags set (error condition!) */
-+#define DUMP_DH_RAW 0x1 /* raw page (no compression) */
-+#define DUMP_DH_COMPRESSED 0x2 /* page is compressed */
-+#define DUMP_DH_END 0x4 /* end marker on a full dump */
-+#define DUMP_DH_TRUNCATED 0x8 /* dump is incomplete */
-+#define DUMP_DH_TEST_PATTERN 0x10 /* dump page is a test pattern */
-+#define DUMP_DH_NOT_USED 0x20 /* 1st bit not used in flags */
-+
-+/* names for various dump parameters in /proc/kernel */
-+#define DUMP_ROOT_NAME "sys/dump"
-+#define DUMP_DEVICE_NAME "device"
-+#define DUMP_COMPRESS_NAME "compress"
-+#define DUMP_LEVEL_NAME "level"
-+#define DUMP_FLAGS_NAME "flags"
-+#define DUMP_ADDR_NAME "addr"
-+
-+#define DUMP_SYSRQ_KEY 'd' /* key to use for MAGIC_SYSRQ key */
-+
-+/* CTL_DUMP names: */
-+enum
-+{
-+ CTL_DUMP_DEVICE=1,
-+ CTL_DUMP_COMPRESS=3,
-+ CTL_DUMP_LEVEL=3,
-+ CTL_DUMP_FLAGS=4,
-+ CTL_DUMP_ADDR=5,
-+ CTL_DUMP_TEST=6,
-+};
-+
-+
-+/* page size for gzip compression -- buffered slightly beyond hardware PAGE_SIZE used by DUMP */
-+#define DUMP_DPC_PAGE_SIZE (DUMP_PAGE_SIZE + 512)
-+
-+/* dump ioctl() control options */
-+#define DIOSDUMPDEV 1 /* set the dump device */
-+#define DIOGDUMPDEV 2 /* get the dump device */
-+#define DIOSDUMPLEVEL 3 /* set the dump level */
-+#define DIOGDUMPLEVEL 4 /* get the dump level */
-+#define DIOSDUMPFLAGS 5 /* set the dump flag parameters */
-+#define DIOGDUMPFLAGS 6 /* get the dump flag parameters */
-+#define DIOSDUMPCOMPRESS 7 /* set the dump compress level */
-+#define DIOGDUMPCOMPRESS 8 /* get the dump compress level */
-+
-+/* these ioctls are used only by netdump module */
-+#define DIOSTARGETIP 9 /* set the target m/c's ip */
-+#define DIOGTARGETIP 10 /* get the target m/c's ip */
-+#define DIOSTARGETPORT 11 /* set the target m/c's port */
-+#define DIOGTARGETPORT 12 /* get the target m/c's port */
-+#define DIOSSOURCEPORT 13 /* set the source m/c's port */
-+#define DIOGSOURCEPORT 14 /* get the source m/c's port */
-+#define DIOSETHADDR 15 /* set ethernet address */
-+#define DIOGETHADDR 16 /* get ethernet address */
-+
-+/*
-+ * Structure: __dump_header
-+ * Function: This is the header dumped at the top of every valid crash
-+ * dump.
-+ */
-+struct __dump_header {
-+ /* the dump magic number -- unique to verify dump is valid */
-+ u64 dh_magic_number;
-+
-+ /* the version number of this dump */
-+ u32 dh_version;
-+
-+ /* the size of this header (in case we can't read it) */
-+ u32 dh_header_size;
-+
-+ /* the level of this dump (just a header?) */
-+ u32 dh_dump_level;
-+
-+ /*
-+ * We assume dump_page_size to be 4K in every case.
-+ * Store here the configurable system page size (4K, 8K, 16K, etc.)
-+ */
-+ u32 dh_page_size;
-+
-+ /* the size of all physical memory */
-+ u64 dh_memory_size;
-+
-+ /* the start of physical memory */
-+ u64 dh_memory_start;
-+
-+ /* the end of physical memory */
-+ u64 dh_memory_end;
-+
-+ /* the number of hardware/physical pages in this dump specifically */
-+ u32 dh_num_dump_pages;
-+
-+ /* the panic string, if available */
-+ char dh_panic_string[DUMP_PANIC_LEN];
-+
-+ /* timeval depends on architecture, two long values */
-+ struct {
-+ u64 tv_sec;
-+ u64 tv_usec;
-+ } dh_time; /* the time of the system crash */
-+
-+ /* the NEW utsname (uname) information -- in character form */
-+ /* we do this so we don't have to include utsname.h */
-+ /* plus it helps us be more architecture independent */
-+ /* now maybe one day soon they'll make the [65] a #define! */
-+ char dh_utsname_sysname[65];
-+ char dh_utsname_nodename[65];
-+ char dh_utsname_release[65];
-+ char dh_utsname_version[65];
-+ char dh_utsname_machine[65];
-+ char dh_utsname_domainname[65];
-+
-+ /* the address of current task (OLD = void *, NEW = u64) */
-+ u64 dh_current_task;
-+
-+ /* what type of compression we're using in this dump (if any) */
-+ u32 dh_dump_compress;
-+
-+ /* any additional flags */
-+ u32 dh_dump_flags;
-+
-+ /* any additional flags */
-+ u32 dh_dump_device;
-+} __attribute__((packed));
-+
-+/*
-+ * Structure: __dump_page
-+ * Function: To act as the header associated to each physical page of
-+ * memory saved in the system crash dump. This allows for
-+ * easy reassembly of each crash dump page. The address bits
-+ * are split to make things easier for 64-bit/32-bit system
-+ * conversions.
-+ *
-+ * dp_byte_offset and dp_page_index are landmarks that are helpful when
-+ * looking at a hex dump of /dev/vmdump,
-+ */
-+struct __dump_page {
-+ /* the address of this dump page */
-+ u64 dp_address;
-+
-+ /* the size of this dump page */
-+ u32 dp_size;
-+
-+ /* flags (currently DUMP_COMPRESSED, DUMP_RAW or DUMP_END) */
-+ u32 dp_flags;
-+} __attribute__((packed));
-+
-+/*
-+ * Structure: __lkcdinfo
-+ * Function: This structure contains information needed for the lkcdutils
-+ * package (particularly lcrash) to determine what information is
-+ * associated to this kernel, specifically.
-+ */
-+struct __lkcdinfo {
-+ int arch;
-+ int ptrsz;
-+ int byte_order;
-+ int linux_release;
-+ int page_shift;
-+ int page_size;
-+ u64 page_mask;
-+ u64 page_offset;
-+ int stack_offset;
-+};
-+
-+#ifdef __KERNEL__
-+
-+/*
-+ * Structure: __dump_compress
-+ * Function: This is what an individual compression mechanism can use
-+ * to plug in their own compression techniques. It's always
-+ * best to build these as individual modules so that people
-+ * can put in whatever they want.
-+ */
-+struct __dump_compress {
-+ /* the list_head structure for list storage */
-+ struct list_head list;
-+
-+ /* the type of compression to use (DUMP_COMPRESS_XXX) */
-+ int compress_type;
-+ const char *compress_name;
-+
-+ /* the compression function to call */
-+ u16 (*compress_func)(const u8 *, u16, u8 *, u16);
-+};
-+
-+/* functions for dump compression registration */
-+extern void dump_register_compression(struct __dump_compress *);
-+extern void dump_unregister_compression(int);
-+
-+/*
-+ * Structure dump_mbank[]:
-+ *
-+ * For CONFIG_DISCONTIGMEM systems this array specifies the
-+ * memory banks/chunks that need to be dumped after a panic.
-+ *
-+ * For classic systems it specifies a single set of pages from
-+ * 0 to max_mapnr.
-+ */
-+struct __dump_mbank {
-+ u64 start;
-+ u64 end;
-+ int type;
-+ int pad1;
-+ long pad2;
-+};
-+
-+#define DUMP_MBANK_TYPE_CONVENTIONAL_MEMORY 1
-+#define DUMP_MBANK_TYPE_OTHER 2
-+
-+#define MAXCHUNKS 256
-+extern int dump_mbanks;
-+extern struct __dump_mbank dump_mbank[MAXCHUNKS];
-+
-+/* notification event codes */
-+#define DUMP_BEGIN 0x0001 /* dump beginning */
-+#define DUMP_END 0x0002 /* dump ending */
-+
-+/* Scheduler soft spin control.
-+ *
-+ * 0 - no dump in progress
-+ * 1 - cpu0 is dumping, ...
-+ */
-+extern unsigned long dump_oncpu;
-+extern void dump_execute(const char *, const struct pt_regs *);
-+
-+/*
-+ * Notifier list for kernel code which wants to be called
-+ * at kernel dump.
-+ */
-+extern struct notifier_block *dump_notifier_list;
-+static inline int register_dump_notifier(struct notifier_block *nb)
-+{
-+ return notifier_chain_register(&dump_notifier_list, nb);
-+}
-+static inline int unregister_dump_notifier(struct notifier_block * nb)
-+{
-+ return notifier_chain_unregister(&dump_notifier_list, nb);
-+}
-+
-+extern void (*dump_function_ptr)(const char *, const struct pt_regs *);
-+static inline void dump(char * str, struct pt_regs * regs)
-+{
-+ if (dump_function_ptr)
-+ dump_function_ptr(str, regs);
-+}
-+
-+/*
-+ * Common Arch Specific Functions should be declared here.
-+ * This allows the C compiler to detect discrepancies.
-+ */
-+extern void __dump_open(void);
-+extern void __dump_cleanup(void);
-+extern void __dump_init(u64);
-+extern void __dump_save_regs(struct pt_regs *, const struct pt_regs *);
-+extern int __dump_configure_header(const struct pt_regs *);
-+extern void __dump_irq_enable(void);
-+extern void __dump_irq_restore(void);
-+extern int __dump_page_valid(unsigned long index);
-+#ifdef CONFIG_SMP
-+extern void __dump_save_other_cpus(void);
-+#else
-+#define __dump_save_other_cpus()
-+#endif
-+
-+/* to track all used (compound + zero order) pages */
-+#define PageInuse(p) (PageCompound(p) || page_count(p))
-+
-+#endif /* __KERNEL__ */
-+
-+#else /* !CONFIG_CRASH_DUMP */
-+
-+/* If not configured then make code disappear! */
-+#define register_dump_watchdog(x) do { } while(0)
-+#define unregister_dump_watchdog(x) do { } while(0)
-+#define register_dump_notifier(x) do { } while(0)
-+#define unregister_dump_notifier(x) do { } while(0)
-+#define dump_in_progress() 0
-+#define dump(x, y) do { } while(0)
-+
-+#endif /* !CONFIG_CRASH_DUMP */
-+
-+#endif /* _DUMP_H */
-Index: linux-2.6.0-test5/include/linux/dump_netdev.h
-===================================================================
---- linux-2.6.0-test5.orig/include/linux/dump_netdev.h 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/include/linux/dump_netdev.h 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,82 @@
-+/*
-+ * linux/drivers/net/netconsole.h
-+ *
-+ * Copyright (C) 2001 Ingo Molnar <mingo@redhat.com>
-+ *
-+ * This file contains the implementation of an IRQ-safe, crash-safe
-+ * kernel console implementation that outputs kernel messages to the
-+ * network.
-+ *
-+ * Modification history:
-+ *
-+ * 2001-09-17 started by Ingo Molnar.
-+ */
-+
-+/****************************************************************
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License as published by
-+ * the Free Software Foundation; either version 2, or (at your option)
-+ * any later version.
-+ *
-+ * This program is distributed in the hope that it will be useful,
-+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
-+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-+ * GNU General Public License for more details.
-+ *
-+ * You should have received a copy of the GNU General Public License
-+ * along with this program; if not, write to the Free Software
-+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-+ *
-+ ****************************************************************/
-+
-+#define NETCONSOLE_VERSION 0x03
-+
-+enum netdump_commands {
-+ COMM_NONE = 0,
-+ COMM_SEND_MEM = 1,
-+ COMM_EXIT = 2,
-+ COMM_REBOOT = 3,
-+ COMM_HELLO = 4,
-+ COMM_GET_NR_PAGES = 5,
-+ COMM_GET_PAGE_SIZE = 6,
-+ COMM_START_NETDUMP_ACK = 7,
-+ COMM_GET_REGS = 8,
-+ COMM_GET_MAGIC = 9,
-+ COMM_START_WRITE_NETDUMP_ACK = 10,
-+ COMM_SYSRQ = 11,
-+};
-+
-+typedef struct netdump_req_s {
-+ u64 magic;
-+ u32 nr;
-+ u32 command;
-+ u32 from;
-+ u32 to;
-+} req_t;
-+
-+enum netdump_replies {
-+ REPLY_NONE = 0,
-+ REPLY_ERROR = 1,
-+ REPLY_LOG = 2,
-+ REPLY_MEM = 3,
-+ REPLY_RESERVED = 4,
-+ REPLY_HELLO = 5,
-+ REPLY_NR_PAGES = 6,
-+ REPLY_PAGE_SIZE = 7,
-+ REPLY_START_NETDUMP = 8,
-+ REPLY_END_NETDUMP = 9,
-+ REPLY_REGS = 10,
-+ REPLY_MAGIC = 11,
-+ REPLY_START_WRITE_NETDUMP = 12,
-+ REPLY_SYSRQ = 13,
-+};
-+
-+typedef struct netdump_reply_s {
-+ u32 nr;
-+ u32 code;
-+ u32 info;
-+} reply_t;
-+
-+#define HEADER_LEN (1 + sizeof(reply_t))
-+
-+
-Index: linux-2.6.0-test5/include/asm-i386/dump.h
-===================================================================
---- linux-2.6.0-test5.orig/include/asm-i386/dump.h 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/include/asm-i386/dump.h 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,93 @@
-+/*
-+ * Kernel header file for Linux crash dumps.
-+ *
-+ * Created by: Matt Robinson (yakker@sgi.com)
-+ *
-+ * Copyright 1999 Silicon Graphics, Inc. All rights reserved.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+/* This header file holds the architecture specific crash dump header */
-+#ifndef _ASM_DUMP_H
-+#define _ASM_DUMP_H
-+
-+/* necessary header files */
-+#include <asm/ptrace.h>
-+#include <asm/page.h>
-+#include <linux/threads.h>
-+#include <linux/mm.h>
-+
-+/* definitions */
-+#define DUMP_ASM_MAGIC_NUMBER 0xdeaddeadULL /* magic number */
-+#define DUMP_ASM_VERSION_NUMBER 0x3 /* version number */
-+
-+/* max number of cpus */
-+#define DUMP_MAX_NUM_CPUS 32
-+
-+/*
-+ * Structure: __dump_header_asm
-+ * Function: This is the header for architecture-specific stuff. It
-+ * follows right after the dump header.
-+ */
-+struct __dump_header_asm {
-+ /* the dump magic number -- unique to verify dump is valid */
-+ u64 dha_magic_number;
-+
-+ /* the version number of this dump */
-+ u32 dha_version;
-+
-+ /* the size of this header (in case we can't read it) */
-+ u32 dha_header_size;
-+
-+ /* the esp for i386 systems */
-+ u32 dha_esp;
-+
-+ /* the eip for i386 systems */
-+ u32 dha_eip;
-+
-+ /* the dump registers */
-+ struct pt_regs dha_regs;
-+
-+ /* smp specific */
-+ u32 dha_smp_num_cpus;
-+ u32 dha_dumping_cpu;
-+ struct pt_regs dha_smp_regs[DUMP_MAX_NUM_CPUS];
-+ u32 dha_smp_current_task[DUMP_MAX_NUM_CPUS];
-+ u32 dha_stack[DUMP_MAX_NUM_CPUS];
-+ u32 dha_stack_ptr[DUMP_MAX_NUM_CPUS];
-+} __attribute__((packed));
-+
-+#ifdef __KERNEL__
-+
-+extern struct __dump_header_asm dump_header_asm;
-+
-+#ifdef CONFIG_SMP
-+extern cpumask_t irq_affinity[];
-+extern int (*dump_ipi_function_ptr)(struct pt_regs *);
-+extern void dump_send_ipi(void);
-+#else
-+#define dump_send_ipi() do { } while(0)
-+#endif
-+
-+static inline void get_current_regs(struct pt_regs *regs)
-+{
-+ __asm__ __volatile__("movl %%ebx,%0" : "=m"(regs->ebx));
-+ __asm__ __volatile__("movl %%ecx,%0" : "=m"(regs->ecx));
-+ __asm__ __volatile__("movl %%edx,%0" : "=m"(regs->edx));
-+ __asm__ __volatile__("movl %%esi,%0" : "=m"(regs->esi));
-+ __asm__ __volatile__("movl %%edi,%0" : "=m"(regs->edi));
-+ __asm__ __volatile__("movl %%ebp,%0" : "=m"(regs->ebp));
-+ __asm__ __volatile__("movl %%eax,%0" : "=m"(regs->eax));
-+ __asm__ __volatile__("movl %%esp,%0" : "=m"(regs->esp));
-+ __asm__ __volatile__("movw %%ss, %%ax;" :"=a"(regs->xss));
-+ __asm__ __volatile__("movw %%cs, %%ax;" :"=a"(regs->xcs));
-+ __asm__ __volatile__("movw %%ds, %%ax;" :"=a"(regs->xds));
-+ __asm__ __volatile__("movw %%es, %%ax;" :"=a"(regs->xes));
-+ __asm__ __volatile__("pushfl; popl %0" :"=m"(regs->eflags));
-+ regs->eip = (unsigned long)current_text_addr();
-+}
-+
-+#endif /* __KERNEL__ */
-+
-+#endif /* _ASM_DUMP_H */
-Index: linux-2.6.0-test5/init/kerntypes.c
-===================================================================
---- linux-2.6.0-test5.orig/init/kerntypes.c 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/init/kerntypes.c 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,31 @@
-+/*
-+ * kerntypes.c
-+ *
-+ * Copyright (C) 2000 Tom Morano (tjm@sgi.com) and
-+ * Matt D. Robinson (yakker@alacritech.com)
-+ *
-+ * Dummy module that includes headers for all kernel types of interest.
-+ * The kernel type information is used by the lcrash utility when
-+ * analyzing system crash dumps or the live system. Using the type
-+ * information for the running system, rather than kernel header files,
-+ * makes for a more flexible and robust analysis tool.
-+ *
-+ * This source code is released under version 2 of the GNU GPL.
-+ */
-+
-+#include <linux/compile.h>
-+#include <linux/module.h>
-+#include <linux/mm.h>
-+#include <linux/config.h>
-+#include <linux/utsname.h>
-+#include <linux/dump.h>
-+
-+#ifdef LINUX_COMPILE_VERSION_ID_TYPE
-+/* Define version type for version validation of dump and kerntypes */
-+LINUX_COMPILE_VERSION_ID_TYPE;
-+#endif
-+
-+void
-+kerntypes_dummy(void)
-+{
-+}
-Index: linux-2.6.0-test5/drivers/dump/dump_methods.h
-===================================================================
---- linux-2.6.0-test5.orig/drivers/dump/dump_methods.h 2003-09-26 14:26:34.000000000 +0800
-+++ linux-2.6.0-test5/drivers/dump/dump_methods.h 2003-09-26 14:26:34.000000000 +0800
-@@ -0,0 +1,348 @@
-+/*
-+ * Generic interfaces for flexible system dump
-+ *
-+ * Started: Oct 2002 - Suparna Bhattacharya (suparna@in.ibm.com)
-+ *
-+ * Copyright (C) 2002 International Business Machines Corp.
-+ *
-+ * This code is released under version 2 of the GNU GPL.
-+ */
-+
-+#ifndef _LINUX_DUMP_METHODS_H
-+#define _LINUX_DUMP_METHODS_H
-+
-+/*
-+ * Inspired by Matt Robinson's suggestion of introducing dump
-+ * methods as a way to enable different crash dump facilities to
-+ * coexist where each employs its own scheme or dumping policy.
-+ *
-+ * The code here creates a framework for flexible dump by defining
-+ * a set of methods and providing associated helpers that differentiate
-+ * between the underlying mechanism (how to dump), overall scheme
-+ * (sequencing of stages and data dumped and associated quiescing),
-+ * output format (what the dump output looks like), target type
-+ * (where to save the dump; see dumpdev.h), and selection policy
-+ * (state/data to dump).
-+ *
-+ * These sets of interfaces can be mixed and matched to build a
-+ * dumper suitable for a given situation, allowing for
-+ * flexibility as well appropriate degree of code reuse.
-+ * For example all features and options of lkcd (including
-+ * granular selective dumping in the near future) should be
-+ * available even when say, the 2 stage soft-boot based mechanism
-+ * is used for taking disruptive dumps.
-+ *
-+ * Todo: Additionally modules or drivers may supply their own
-+ * custom dumpers which extend dump with module specific
-+ * information or hardware state, and can even tweak the
-+ * mechanism when it comes to saving state relevant to
-+ * them.
-+ */
-+
-+#include <linux/sched.h>
-+#include <linux/slab.h>
-+#include <linux/highmem.h>
-+#include <linux/dumpdev.h>
-+
-+#define MAX_PASSES 6
-+#define MAX_DEVS 4
-+
-+
-+/* To customise selection of pages to be dumped in a given pass/group */
-+struct dump_data_filter{
-+ char name[32];
-+ int (*selector)(int, unsigned long, unsigned long);
-+ ulong level_mask; /* dump level(s) for which this filter applies */
-+ loff_t start, end; /* location range applicable */
-+};
-+
-+
-+/*
-+ * Determined by the kind of dump mechanism and appropriate
-+ * overall scheme
-+ */
-+struct dump_scheme_ops {
-+ /* sets aside memory, inits data structures etc */
-+ int (*configure)(unsigned long devid);
-+ /* releases resources */
-+ int (*unconfigure)(void);
-+
-+ /* ordering of passes, invoking iterator */
-+ int (*sequencer)(void);
-+ /* iterates over system data, selects and acts on data to dump */
-+ int (*iterator)(int, int (*)(unsigned long, unsigned long),
-+ struct dump_data_filter *);
-+ /* action when data is selected for dump */
-+ int (*save_data)(unsigned long, unsigned long);
-+ /* action when data is to be excluded from dump */
-+ int (*skip_data)(unsigned long, unsigned long);
-+ /* policies for space, multiple dump devices etc */
-+ int (*write_buffer)(void *, unsigned long);
-+};
-+
-+struct dump_scheme {
-+ /* the name serves as an anchor to locate the scheme after reboot */
-+ char name[32];
-+ struct dump_scheme_ops *ops;
-+ struct list_head list;
-+};
-+
-+/* Quiescing/Silence levels (controls IPI callback behaviour) */
-+extern enum dump_silence_levels {
-+ DUMP_SOFT_SPIN_CPUS = 1,
-+ DUMP_HARD_SPIN_CPUS = 2,
-+ DUMP_HALT_CPUS = 3,
-+} dump_silence_level;
-+
-+/* determined by the dump (file) format */
-+struct dump_fmt_ops {
-+ /* build header */
-+ int (*configure_header)(const char *, const struct pt_regs *);
-+ int (*update_header)(void); /* update header and write it out */
-+ /* save curr context */
-+ void (*save_context)(int, const struct pt_regs *,
-+ struct task_struct *);
-+ /* typically called by the save_data action */
-+ /* add formatted data to the dump buffer */
-+ int (*add_data)(unsigned long, unsigned long);
-+ int (*update_end_marker)(void);
-+};
-+
-+struct dump_fmt {
-+ unsigned long magic;
-+ char name[32]; /* lcrash, crash, elf-core etc */
-+ struct dump_fmt_ops *ops;
-+ struct list_head list;
-+};
-+
-+/*
-+ * Modules will be able add their own data capture schemes by
-+ * registering their own dumpers. Typically they would use the
-+ * primary dumper as a template and tune it with their routines.
-+ * Still Todo.
-+ */
-+
-+/* The combined dumper profile (mechanism, scheme, dev, fmt) */
-+struct dumper {
-+ char name[32]; /* singlestage, overlay (stg1), passthru(stg2), pull */
-+ struct dump_scheme *scheme;
-+ struct dump_fmt *fmt;
-+ struct __dump_compress *compress;
-+ struct dump_data_filter *filter;
-+ struct dump_dev *dev;
-+ /* state valid only for active dumper(s) - per instance */
-+ /* run time state/context */
-+ int curr_pass;
-+ unsigned long count;
-+ loff_t curr_offset; /* current logical offset into dump device */
-+ loff_t curr_loc; /* current memory location */
-+ void *curr_buf; /* current position in the dump buffer */
-+ void *dump_buf; /* starting addr of dump buffer */
-+ int header_dirty; /* whether the header needs to be written out */
-+ int header_len;
-+ struct list_head dumper_list; /* links to other dumpers */
-+};
-+
-+/* Starting point to get to the current configured state */
-+struct dump_config {
-+ ulong level;
-+ ulong flags;
-+ struct dumper *dumper;
-+ unsigned long dump_device;
-+ unsigned long dump_addr; /* relevant only for in-memory dumps */
-+ struct list_head dump_dev_list;
-+};
-+
-+extern struct dump_config dump_config;
-+
-+/* Used to save the dump config across a reboot for 2-stage dumps:
-+ *
-+ * Note: The scheme, format, compression and device type should be
-+ * registered at bootup, for this config to be sharable across soft-boot.
-+ * The function addresses could have changed and become invalid, and
-+ * need to be set up again.
-+ */
-+struct dump_config_block {
-+ u64 magic; /* for a quick sanity check after reboot */
-+ struct dump_memdev memdev; /* handle to dump stored in memory */
-+ struct dump_config config;
-+ struct dumper dumper;
-+ struct dump_scheme scheme;
-+ struct dump_fmt fmt;
-+ struct __dump_compress compress;
-+ struct dump_data_filter filter_table[MAX_PASSES];
-+ struct dump_anydev dev[MAX_DEVS]; /* target dump device */
-+};
-+
-+
-+/* Wrappers that invoke the methods for the current (active) dumper */
-+
-+/* Scheme operations */
-+
-+static inline int dump_sequencer(void)
-+{
-+ return dump_config.dumper->scheme->ops->sequencer();
-+}
-+
-+static inline int dump_iterator(int pass, int (*action)(unsigned long,
-+ unsigned long), struct dump_data_filter *filter)
-+{
-+ return dump_config.dumper->scheme->ops->iterator(pass, action, filter);
-+}
-+
-+#define dump_save_data dump_config.dumper->scheme->ops->save_data
-+#define dump_skip_data dump_config.dumper->scheme->ops->skip_data
-+
-+static inline int dump_write_buffer(void *buf, unsigned long len)
-+{
-+ return dump_config.dumper->scheme->ops->write_buffer(buf, len);
-+}
-+
-+static inline int dump_configure(unsigned long devid)
-+{
-+ return dump_config.dumper->scheme->ops->configure(devid);
-+}
-+
-+static inline int dump_unconfigure(void)
-+{
-+ return dump_config.dumper->scheme->ops->unconfigure();
-+}
-+
-+/* Format operations */
-+
-+static inline int dump_configure_header(const char *panic_str,
-+ const struct pt_regs *regs)
-+{
-+ return dump_config.dumper->fmt->ops->configure_header(panic_str, regs);
-+}
-+
-+static inline void dump_save_context(int cpu, const struct pt_regs *regs,
-+ struct task_struct *tsk)
-+{
-+ dump_config.dumper->fmt->ops->save_context(cpu, regs, tsk);
-+}
-+
-+static inline int dump_save_this_cpu(const struct pt_regs *regs)
-+{
-+ int cpu = smp_processor_id();
-+
-+ dump_save_context(cpu, regs, current);
-+ return 1;
-+}
-+
-+static inline int dump_update_header(void)
-+{
-+ return dump_config.dumper->fmt->ops->update_header();
-+}
-+
-+static inline int dump_update_end_marker(void)
-+{
-+ return dump_config.dumper->fmt->ops->update_end_marker();
-+}
-+
-+static inline int dump_add_data(unsigned long loc, unsigned long sz)
-+{
-+ return dump_config.dumper->fmt->ops->add_data(loc, sz);
-+}
-+
-+/* Compression operation */
-+static inline int dump_compress_data(char *src, int slen, char *dst)
-+{
-+ return dump_config.dumper->compress->compress_func(src, slen,
-+ dst, DUMP_DPC_PAGE_SIZE);
-+}
-+
-+
-+/* Prototypes of some default implementations of dump methods */
-+
-+extern struct __dump_compress dump_none_compression;
-+
-+/* Default scheme methods (dump_scheme.c) */
-+
-+extern int dump_generic_sequencer(void);
-+extern int dump_page_iterator(int pass, int (*action)(unsigned long, unsigned
-+ long), struct dump_data_filter *filter);
-+extern int dump_generic_save_data(unsigned long loc, unsigned long sz);
-+extern int dump_generic_skip_data(unsigned long loc, unsigned long sz);
-+extern int dump_generic_write_buffer(void *buf, unsigned long len);
-+extern int dump_generic_configure(unsigned long);
-+extern int dump_generic_unconfigure(void);
-+
-+/* Default scheme template */
-+extern struct dump_scheme dump_scheme_singlestage;
-+
-+/* Default dump format methods */
-+
-+extern int dump_lcrash_configure_header(const char *panic_str,
-+ const struct pt_regs *regs);
-+extern void dump_lcrash_save_context(int cpu, const struct pt_regs *regs,
-+ struct task_struct *tsk);
-+extern int dump_generic_update_header(void);
-+extern int dump_lcrash_add_data(unsigned long loc, unsigned long sz);
-+extern int dump_lcrash_update_end_marker(void);
-+
-+/* Default format (lcrash) template */
-+extern struct dump_fmt dump_fmt_lcrash;
-+
-+/* Default dump selection filter table */
-+
-+/*
-+ * Entries listed in order of importance and correspond to passes
-+ * The last entry (with a level_mask of zero) typically reflects data that
-+ * won't be dumped -- this may for example be used to identify data
-+ * that will be skipped for certain so the corresponding memory areas can be
-+ * utilized as scratch space.
-+ */
-+extern struct dump_data_filter dump_filter_table[];
-+
-+/* Some pre-defined dumpers */
-+extern struct dumper dumper_singlestage;
-+extern struct dumper dumper_stage1;
-+extern struct dumper dumper_stage2;
-+
-+/* These are temporary */
-+#define DUMP_MASK_HEADER DUMP_LEVEL_HEADER
-+#define DUMP_MASK_KERN DUMP_LEVEL_KERN
-+#define DUMP_MASK_USED DUMP_LEVEL_USED
-+#define DUMP_MASK_UNUSED DUMP_LEVEL_ALL_RAM
-+#define DUMP_MASK_REST 0 /* dummy for now */
-+
-+/* Helpers - move these to dump.h later ? */
-+
-+int dump_generic_execute(const char *panic_str, const struct pt_regs *regs);
-+extern int dump_ll_write(void *buf, unsigned long len);
-+int dump_check_and_free_page(struct dump_memdev *dev, struct page *page);
-+
-+static inline void dumper_reset(void)
-+{
-+ dump_config.dumper->curr_buf = dump_config.dumper->dump_buf;
-+ dump_config.dumper->curr_loc = 0;
-+ dump_config.dumper->curr_offset = 0;
-+ dump_config.dumper->count = 0;
-+ dump_config.dumper->curr_pass = 0;
-+}
-+
-+/*
-+ * May later be moulded to perform boot-time allocations so we can dump
-+ * earlier during bootup
-+ */
-+static inline void *dump_alloc_mem(unsigned long size)
-+{
-+ return kmalloc(size, GFP_KERNEL);
-+}
-+
-+static inline void dump_free_mem(void *buf)
-+{
-+ struct page *page;
-+
-+ /* ignore reserved pages (e.g. post soft boot stage) */
-+ if (buf && (page = virt_to_page(buf))) {
-+ if (PageReserved(page))
-+ return;
-+ }
-+
-+ kfree(buf);
-+}
-+
-+
-+#endif /* _LINUX_DUMP_METHODS_H */
-Index: linux-2.6.0-test5/Makefile
-===================================================================
---- linux-2.6.0-test5.orig/Makefile 2003-09-26 14:26:29.000000000 +0800
-+++ linux-2.6.0-test5/Makefile 2003-09-26 14:26:34.000000000 +0800
-@@ -289,6 +289,10 @@
-
- export MODVERDIR := .tmp_versions
-
-+ifeq ($(CONFIG_CRASH_DUMP),)
-+ CFLAGS += -g
-+endif
-+
- # The temporary file to save gcc -MD generated dependencies must not
- # contain a comma
- comma := ,
git://git.whamcloud.com / fs / lustre-release.git / commitdiff