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parsedump.c
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/*
* CMUCS AFStools
* dumpscan - routines for scanning and manipulating AFS volume dumps
*
* Copyright (c) 1998, 2001 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or [email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/* parsedump.c - Parse a volume dump file */
#include "dumpscan.h"
#include "dumpscan_errs.h"
#include "dumpfmt.h"
#include "internal.h"
#include "stagehdr.h"
static afs_uint32 parse_dumphdr (XFILE *, unsigned char *, tagged_field *,
afs_uint32, tag_parse_info *, void *, void *);
static afs_uint32 parse_dumpend (XFILE *, unsigned char *, tagged_field *,
afs_uint32, tag_parse_info *, void *, void *);
static afs_uint32 store_dumphdr (XFILE *, unsigned char *, tagged_field *,
afs_uint32, tag_parse_info *, void *, void *);
static afs_uint32 parse_dumptimes(XFILE *, unsigned char *, tagged_field *,
afs_uint32, tag_parse_info *, void *, void *);
/** Field list for top-level objects **/
static tagged_field top_fields[] = {
{ TAG_DUMPHEADER, DKIND_SPECIAL, "* DUMP HEADER", parse_dumphdr, 0, 0 },
{ TAG_VOLHEADER, DKIND_SPECIAL, "* VOLUME HEADER", parse_volhdr, 0, 0 },
{ TAG_VNODE, DKIND_SPECIAL, "* VNODE ", parse_vnode, 0, 0 },
{ TAG_DUMPEND, DKIND_INT32, "* DUMP END", parse_dumpend, 0, 0 },
{ V20_VERSMIN, DKIND_SPECIAL, "* STAGE HEADER", try_backuphdr, 0, 0 },
{ 'S', DKIND_SPECIAL, "* STAGE HEADER", try_backuphdr, 0, 0 },
{ 0,0,0,0,0,0 }};
/** Field list for dump headers **/
static tagged_field dumphdr_fields[] = {
{ DHTAG_VOLNAME, DKIND_STRING, " Volume name: ", store_dumphdr, 0, 0 },
{ DHTAG_VOLID, DKIND_INT32, " Volume ID: ", store_dumphdr, 0, 0 },
{ DHTAG_DUMPTIMES, DKIND_SPECIAL, " Dump Range: ", parse_dumptimes, 0, 0 },
{ 0,0,0,0,0,0 }};
/* Parse a dump header, including its tagged attributes, and call the
* dump-header callback, if one is defined.
*/
static afs_uint32 parse_dumphdr(XFILE *X, unsigned char *tag, tagged_field *field,
afs_uint32 value, tag_parse_info *pi,
void *g_refcon, void *l_refcon)
{
dump_parser *p = (dump_parser *)g_refcon;
afs_dump_header hdr;
u_int64 where;
afs_uint32 r;
memset(&hdr, 0, sizeof(hdr));
if (r = xftell(X, &where)) return r;
sub64_32(hdr.offset, where, 1);
if (r = ReadInt32(X, &hdr.magic)) return r;
if (r = ReadInt32(X, &hdr.version)) return r;
if (hdr.magic != DUMPBEGINMAGIC) {
if (p->cb_error)
(p->cb_error)(DSERR_MAGIC, 1, p->err_refcon,
"Invalid magic number (0x%08x) in dump header",
hdr.magic);
return DSERR_MAGIC;
}
if (hdr.version != DUMPVERSION) {
if (p->cb_error)
(p->cb_error)(DSERR_MAGIC, 1, p->err_refcon,
"Unknown dump format version (%d) in dump header",
hdr.version);
return DSERR_MAGIC;
}
if (p->print_flags & DSPRINT_DUMPHDR)
printf("%s [%s = 0x%s]\n", field->label,
decimate_int64(&hdr.offset, 0), hexify_int64(&hdr.offset, 0));
if (p->print_flags & DSPRINT_DUMPHDR) {
printf(" Magic number: 0x%08x\n", hdr.magic);
printf(" Version: %d\n", hdr.version);
}
r = ParseTaggedData(X, dumphdr_fields, tag, pi, g_refcon, (void *)&hdr);
if (!r && p->cb_dumphdr) {
r = xftell(X, &where);
if (!r) r = (p->cb_dumphdr)(&hdr, X, p->refcon);
if (p->flags & DSFLAG_SEEK) {
if (!r) r = xfseek(X, &where);
else xfseek(X, &where);
}
}
if (hdr.field_mask & F_DUMPHDR_VOLNAME)
free(hdr.volname);
return r;
}
/* Store tagged attributes into a dump header */
static afs_uint32 store_dumphdr(XFILE *X, unsigned char *tag, tagged_field *field,
afs_uint32 value, tag_parse_info *pi,
void *g_refcon, void *l_refcon)
{
dump_parser *p = (dump_parser *)g_refcon;
afs_dump_header *hdr = (afs_dump_header *)l_refcon;
switch (field->tag) {
case DHTAG_VOLID:
hdr->field_mask |= F_DUMPHDR_VOLID;
hdr->volid = value;
if (p->print_flags & DSPRINT_DUMPHDR)
printf("%s%d\n", field->label, hdr->volid);
return 0;
case DHTAG_VOLNAME:
if (tag && tag[0]) {
hdr->field_mask |= F_DUMPHDR_VOLNAME;
hdr->volname = tag;
if (p->print_flags & DSPRINT_DUMPHDR)
printf("%s%s\n", field->label, hdr->volname);
return DSERR_KEEP;
} else return 0;
default:
if (p->print_flags & DSPRINT_DUMPHDR)
printf("%s<<< UNKNOWN FIELD >>>\n", field->label);
return 0;
}
}
/* Parse and store the dump time range from a dump header */
static afs_uint32 parse_dumptimes(XFILE *X, unsigned char *tag,
tagged_field *field, afs_uint32 value,
tag_parse_info *pi,
void *g_refcon, void *l_refcon)
{
dump_parser *p = (dump_parser *)g_refcon;
afs_dump_header *hdr = (afs_dump_header *)l_refcon;
afs_uint16 count;
afs_uint32 r;
if (r = ReadInt16(X, &count)) return r;
if (count != 2) {
if (p->cb_error)
(p->cb_error)(DSERR_FMT, 1, p->err_refcon,
"Incorrect array count (%d) in dump times", count);
return DSERR_FMT;
}
if (r = ReadInt32(X, &hdr->from_date)) return r;
if (r = ReadInt32(X, &hdr->to_date)) return r;
hdr->field_mask |= (F_DUMPHDR_FROM | F_DUMPHDR_TO);
if (p->print_flags & DSPRINT_DUMPHDR)
printf("%s%d => %d\n", field->label, hdr->from_date, hdr->to_date);
return ReadByte(X, tag);
}
/* Parse a dump_end record */
static afs_uint32 parse_dumpend(XFILE *X, unsigned char *tag, tagged_field *field,
afs_uint32 value, tag_parse_info *pi,
void *g_refcon, void *l_refcon)
{
dump_parser *p = (dump_parser *)g_refcon;
if (value != DUMPENDMAGIC) {
if (p->cb_error)
(p->cb_error)(DSERR_MAGIC, 1, p->err_refcon,
"Invalid magic number (0x%08x) in dump trailer",
value);
return DSERR_MAGIC;
}
if (p->print_flags & (DSPRINT_DUMPHDR | DSPRINT_ITEM))
printf("%s\n", field->label);
return DSERR_DONE;
}
afs_uint32 ParseDumpFile(XFILE *X, dump_parser *p)
{
tag_parse_info pi;
unsigned char tag;
afs_uint32 r;
prep_pi(p, &pi);
r = ParseTaggedData(X, top_fields, &tag, &pi, (void *)p, 0);
return handle_return(r, X, tag, p);
}
afs_uint32 ParseDumpHeader(XFILE *X, dump_parser *p)
{
tag_parse_info pi;
unsigned char tag;
afs_uint32 r;
prep_pi(p, &pi);
if (r = ReadByte(X, &tag)) return handle_return(r, X, tag, p);
if (tag != TAG_DUMPHEADER) return handle_return(0, X, tag, p);
r = parse_dumphdr(X, &tag, &top_fields[0], 0, &pi, (void *)p, 0);
if (!r && tag >= 1 && tag <= 4) r = DSERR_DONE;
return handle_return(r, X, tag, p);
}
afs_uint32 ParseVolumeHeader(XFILE *X, dump_parser *p)
{
tag_parse_info pi;
unsigned char tag;
afs_uint32 r;
prep_pi(p, &pi);
if (r = ReadByte(X, &tag)) return handle_return(r, X, tag, p);
if (tag != TAG_VOLHEADER) return handle_return(0, X, tag, p);
r = parse_volhdr(X, &tag, &top_fields[1], 0, &pi, (void *)p, 0);
if (!r && tag >= 1 && tag <= 4) r = DSERR_DONE;
return handle_return(r, X, tag, p);
}
afs_uint32 ParseVNode(XFILE *X, dump_parser *p)
{
tag_parse_info pi;
unsigned char tag;
afs_uint32 r;
prep_pi(p, &pi);
if (r = ReadByte(X, &tag)) return handle_return(r, X, tag, p);
if (tag != TAG_VNODE) return handle_return(0, X, tag, p);
r = parse_vnode(X, &tag, &top_fields[2], 0, &pi, (void *)p, 0);
if (!r && tag >= 1 && tag <= 4) r = DSERR_DONE;
return handle_return(r, X, tag, p);
}