kernel/cpr/cpr_dump.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright 2010 Sun Microsystems, Inc.  All rights reserved.
  23  * Use is subject to license terms.
  24  */
  25
  26 /*
  27  * Fill in and write out the cpr state file
  28  *      1. Allocate and write headers, ELF and cpr dump header
  29  *      2. Allocate bitmaps according to phys_install
  30  *      3. Tag kernel pages into corresponding bitmap
  31  *      4. Write bitmaps to state file
  32  *      5. Write actual physical page data to state file
  33  */
  34
  35 #include <sys/types.h>
  36 #include <sys/systm.h>
  37 #include <sys/vm.h>
  38 #include <sys/memlist.h>
  39 #include <sys/kmem.h>
  40 #include <sys/vnode.h>
  41 #include <sys/fs/ufs_inode.h>
  42 #include <sys/errno.h>
  43 #include <sys/cmn_err.h>
  44 #include <sys/debug.h>
  45 #include <vm/page.h>
  46 #include <vm/seg.h>
  47 #include <vm/seg_kmem.h>
  48 #include <vm/seg_kpm.h>
  49 #include <vm/hat.h>
  50 #include <sys/cpr.h>
  51 #include <sys/conf.h>
  52 #include <sys/ddi.h>
  53 #include <sys/panic.h>
  54 #include <sys/thread.h>
  55 #include <sys/note.h>
  56
  57 /* Local defines and variables */
  58 #define BTOb(bytes)     ((bytes) << 3)          /* Bytes to bits, log2(NBBY) */
  59 #define bTOB(bits)      ((bits) >> 3)           /* bits to Bytes, log2(NBBY) */
  60
  61
  62 int cpr_flush_write(vnode_t *);
  63
  64 int cpr_contig_pages(vnode_t *, int);
  65
  66 void cpr_clear_bitmaps();
  67
  68 extern size_t cpr_get_devsize(dev_t);
  69 extern int i_cpr_dump_setup(vnode_t *);
  70 extern int i_cpr_blockzero(char *, char **, int *, vnode_t *);
  71 extern int cpr_test_mode;
  72 int cpr_setbit(pfn_t, int);
  73 int cpr_clrbit(pfn_t, int);
  74
  75 ctrm_t cpr_term;
  76
  77 char *cpr_buf, *cpr_buf_end;
  78 int cpr_buf_blocks;             /* size of cpr_buf in blocks */
  79 size_t cpr_buf_size;            /* size of cpr_buf in bytes */
  80 size_t cpr_bitmap_size;
  81 int cpr_nbitmaps;
  82
  83 char *cpr_pagedata;             /* page buffer for compression / tmp copy */
  84 size_t cpr_pagedata_size;       /* page buffer size in bytes */
  85
  86
  87 char cpr_pagecopy[CPR_MAXCONTIG * MMU_PAGESIZE];
  88
  89
  90
  91 /*
  92  * creates the CPR state file, the following sections are
  93  * written out in sequence:
  94  *    - writes the cpr dump header
  95  *    - writes the memory usage bitmaps
  96  *    - writes the platform dependent info
  97  *    - writes the remaining user pages
  98  *    - writes the kernel pages
  99  */
 100 #if defined(__x86)
 101         _NOTE(ARGSUSED(0))
 102 #endif
 103 int
 104 cpr_dump(vnode_t *vp)
 105 {
 106
 107         return (0);
 108 }
 109
 110