Author: avg
Date: Thu Dec 5 11:29:07 2013
New Revision: 258972
URL: http://svnweb.freebsd.org/changeset/base/258972
Log:
4373 add block contents print to zstreamdump
illumos/illumos-gate@994fb6b8a9d07a8021d77d79f46e30637bca3ad3
Modified:
vendor/illumos/dist/cmd/zstreamdump/zstreamdump.c
Modified: vendor/illumos/dist/cmd/zstreamdump/zstreamdump.c
==============================================================================
--- vendor/illumos/dist/cmd/zstreamdump/zstreamdump.c Thu Dec 5 10:36:00
2013 (r258971)
+++ vendor/illumos/dist/cmd/zstreamdump/zstreamdump.c Thu Dec 5 11:29:07
2013 (r258972)
@@ -24,6 +24,11 @@
* Use is subject to license terms.
*/
+/*
+ * Copyright (c) 2013 by Delphix. All rights reserved.
+ */
+
+#include <ctype.h>
#include <libnvpair.h>
#include <stdio.h>
#include <stdlib.h>
@@ -34,6 +39,16 @@
#include <sys/zfs_ioctl.h>
#include <zfs_fletcher.h>
+/*
+ * If dump mode is enabled, the number of bytes to print per line
+ */
+#define BYTES_PER_LINE 16
+/*
+ * If dump mode is enabled, the number of bytes to group together, separated
+ * by newlines or spaces
+ */
+#define DUMP_GROUPING 4
+
uint64_t drr_record_count[DRR_NUMTYPES];
uint64_t total_write_size = 0;
uint64_t total_stream_len = 0;
@@ -45,9 +60,11 @@ boolean_t do_cksum = B_TRUE;
static void
usage(void)
{
- (void) fprintf(stderr, "usage: zstreamdump [-v] [-C] < file\n");
+ (void) fprintf(stderr, "usage: zstreamdump [-v] [-C] [-d] < file\n");
(void) fprintf(stderr, "\t -v -- verbose\n");
(void) fprintf(stderr, "\t -C -- suppress checksum verification\n");
+ (void) fprintf(stderr, "\t -d -- dump contents of blocks modified, "
+ "implies verbose\n");
exit(1);
}
@@ -75,6 +92,70 @@ ssread(void *buf, size_t len, zio_cksum_
return (outlen);
}
+/*
+ * Print part of a block in ASCII characters
+ */
+static void
+print_ascii_block(char *subbuf, int length)
+{
+ int i;
+
+ for (i = 0; i < length; i++) {
+ char char_print = isprint(subbuf[i]) ? subbuf[i] : '.';
+ if (i != 0 && i % DUMP_GROUPING == 0) {
+ (void) printf(" ");
+ }
+ (void) printf("%c", char_print);
+ }
+ (void) printf("\n");
+}
+
+/*
+ * print_block - Dump the contents of a modified block to STDOUT
+ *
+ * Assume that buf has capacity evenly divisible by BYTES_PER_LINE
+ */
+static void
+print_block(char *buf, int length)
+{
+ int i;
+ /*
+ * Start printing ASCII characters at a constant offset, after
+ * the hex prints. Leave 3 characters per byte on a line (2 digit
+ * hex number plus 1 space) plus spaces between characters and
+ * groupings
+ */
+ int ascii_start = BYTES_PER_LINE * 3 +
+ BYTES_PER_LINE / DUMP_GROUPING + 2;
+
+ for (i = 0; i < length; i += BYTES_PER_LINE) {
+ int j;
+ int this_line_length = MIN(BYTES_PER_LINE, length - i);
+ int print_offset = 0;
+
+ for (j = 0; j < this_line_length; j++) {
+ int buf_offset = i + j;
+
+ /*
+ * Separate every DUMP_GROUPING bytes by a space.
+ */
+ if (buf_offset % DUMP_GROUPING == 0) {
+ print_offset += printf(" ");
+ }
+
+ /*
+ * Print the two-digit hex value for this byte.
+ */
+ unsigned char hex_print = buf[buf_offset];
+ print_offset += printf("%02x ", hex_print);
+ }
+
+ (void) printf("%*s", ascii_start - print_offset, " ");
+
+ print_ascii_block(buf + i, this_line_length);
+ }
+}
+
int
main(int argc, char *argv[])
{
@@ -92,11 +173,17 @@ main(int argc, char *argv[])
char c;
boolean_t verbose = B_FALSE;
boolean_t first = B_TRUE;
+ /*
+ * dump flag controls whether the contents of any modified data blocks
+ * are printed to the console during processing of the stream. Warning:
+ * for large streams, this can obviously lead to massive prints.
+ */
+ boolean_t dump = B_FALSE;
int err;
zio_cksum_t zc = { 0 };
zio_cksum_t pcksum = { 0 };
- while ((c = getopt(argc, argv, ":vC")) != -1) {
+ while ((c = getopt(argc, argv, ":vCd")) != -1) {
switch (c) {
case 'C':
do_cksum = B_FALSE;
@@ -104,6 +191,10 @@ main(int argc, char *argv[])
case 'v':
verbose = B_TRUE;
break;
+ case 'd':
+ dump = B_TRUE;
+ verbose = B_TRUE;
+ break;
case ':':
(void) fprintf(stderr,
"missing argument for '%c' option\n", optopt);
@@ -128,6 +219,10 @@ main(int argc, char *argv[])
pcksum = zc;
while (ssread(drr, sizeof (dmu_replay_record_t), &zc)) {
+ /*
+ * If this is the first DMU record being processed, check for
+ * the magic bytes and figure out the endian-ness based on them.
+ */
if (first) {
if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC)) {
do_byteswap = B_TRUE;
@@ -209,7 +304,7 @@ main(int argc, char *argv[])
nvlist_t *nv;
int sz = drr->drr_payloadlen;
- if (sz > 1<<20) {
+ if (sz > INITIAL_BUFLEN) {
free(buf);
buf = malloc(sz);
}
@@ -283,6 +378,10 @@ main(int argc, char *argv[])
if (drro->drr_bonuslen > 0) {
(void) ssread(buf, P2ROUNDUP(drro->drr_bonuslen,
8), &zc);
+ if (dump) {
+ print_block(buf,
+ P2ROUNDUP(drro->drr_bonuslen, 8));
+ }
}
break;
@@ -312,6 +411,10 @@ main(int argc, char *argv[])
drrw->drr_key.ddk_prop =
BSWAP_64(drrw->drr_key.ddk_prop);
}
+ /*
+ * If this is verbose and/or dump output,
+ * print info on the modified block
+ */
if (verbose) {
(void) printf("WRITE object = %llu type = %u "
"checksum type = %u\n"
@@ -324,7 +427,16 @@ main(int argc, char *argv[])
(u_longlong_t)drrw->drr_length,
(u_longlong_t)drrw->drr_key.ddk_prop);
}
+ /*
+ * Read the contents of the block in from STDIN to buf
+ */
(void) ssread(buf, drrw->drr_length, &zc);
+ /*
+ * If in dump mode
+ */
+ if (dump) {
+ print_block(buf, drrw->drr_length);
+ }
total_write_size += drrw->drr_length;
break;
@@ -390,6 +502,9 @@ main(int argc, char *argv[])
drrs->drr_length);
}
(void) ssread(buf, drrs->drr_length, &zc);
+ if (dump) {
+ print_block(buf, drrs->drr_length);
+ }
break;
}
pcksum = zc;
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