| Current Path : /usr/src/sbin/geom/class/journal/ |
FreeBSD hs32.drive.ne.jp 9.1-RELEASE FreeBSD 9.1-RELEASE #1: Wed Jan 14 12:18:08 JST 2015 root@hs32.drive.ne.jp:/sys/amd64/compile/hs32 amd64 |
| Current File : //usr/src/sbin/geom/class/journal/geom_journal.c |
/*-
* Copyright (c) 2005-2006 Pawel Jakub Dawidek <pjd@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/sbin/geom/class/journal/geom_journal.c 213662 2010-10-09 20:20:27Z ae $");
#include <sys/types.h>
#include <errno.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <strings.h>
#include <assert.h>
#include <libgeom.h>
#include <geom/journal/g_journal.h>
#include <core/geom.h>
#include <misc/subr.h>
#include "geom_journal.h"
uint32_t lib_version = G_LIB_VERSION;
uint32_t version = G_JOURNAL_VERSION;
static void journal_main(struct gctl_req *req, unsigned flags);
static void journal_clear(struct gctl_req *req);
static void journal_dump(struct gctl_req *req);
static void journal_label(struct gctl_req *req);
struct g_command class_commands[] = {
{ "clear", G_FLAG_VERBOSE, journal_main, G_NULL_OPTS,
"[-v] prov ..."
},
{ "dump", 0, journal_main, G_NULL_OPTS,
"prov ..."
},
{ "label", G_FLAG_VERBOSE, journal_main,
{
{ 'c', "checksum", NULL, G_TYPE_BOOL },
{ 'f', "force", NULL, G_TYPE_BOOL },
{ 'h', "hardcode", NULL, G_TYPE_BOOL },
{ 's', "jsize", "-1", G_TYPE_NUMBER },
G_OPT_SENTINEL
},
"[-cfhv] [-s jsize] dataprov [jprov]"
},
{ "stop", G_FLAG_VERBOSE, NULL,
{
{ 'f', "force", NULL, G_TYPE_BOOL },
G_OPT_SENTINEL
},
"[-fv] name ..."
},
{ "sync", G_FLAG_VERBOSE, NULL, G_NULL_OPTS,
"[-v]"
},
G_CMD_SENTINEL
};
static int verbose = 0;
static void
journal_main(struct gctl_req *req, unsigned flags)
{
const char *name;
if ((flags & G_FLAG_VERBOSE) != 0)
verbose = 1;
name = gctl_get_ascii(req, "verb");
if (name == NULL) {
gctl_error(req, "No '%s' argument.", "verb");
return;
}
if (strcmp(name, "label") == 0)
journal_label(req);
else if (strcmp(name, "clear") == 0)
journal_clear(req);
else if (strcmp(name, "dump") == 0)
journal_dump(req);
else
gctl_error(req, "Unknown command: %s.", name);
}
static int
g_journal_fs_exists(const char *prov)
{
if (g_journal_ufs_exists(prov))
return (1);
#if 0
if (g_journal_otherfs_exists(prov))
return (1);
#endif
return (0);
}
static int
g_journal_fs_using_last_sector(const char *prov)
{
if (g_journal_ufs_using_last_sector(prov))
return (1);
#if 0
if (g_journal_otherfs_using_last_sector(prov))
return (1);
#endif
return (0);
}
static void
journal_label(struct gctl_req *req)
{
struct g_journal_metadata md;
const char *data, *journal, *str;
u_char sector[512];
intmax_t jsize, msize, ssize;
int error, force, i, nargs, checksum, hardcode;
nargs = gctl_get_int(req, "nargs");
str = NULL; /* gcc */
strlcpy(md.md_magic, G_JOURNAL_MAGIC, sizeof(md.md_magic));
md.md_version = G_JOURNAL_VERSION;
md.md_id = arc4random();
md.md_joffset = 0;
md.md_jid = 0;
md.md_flags = GJ_FLAG_CLEAN;
checksum = gctl_get_int(req, "checksum");
if (checksum)
md.md_flags |= GJ_FLAG_CHECKSUM;
force = gctl_get_int(req, "force");
hardcode = gctl_get_int(req, "hardcode");
if (nargs != 1 && nargs != 2) {
gctl_error(req, "Invalid number of arguments.");
return;
}
/* Verify the given providers. */
for (i = 0; i < nargs; i++) {
str = gctl_get_ascii(req, "arg%d", i);
if (g_get_mediasize(str) == 0) {
gctl_error(req, "Invalid provider %s.", str);
return;
}
}
data = gctl_get_ascii(req, "arg0");
jsize = gctl_get_intmax(req, "jsize");
journal = NULL;
switch (nargs) {
case 1:
if (!force && g_journal_fs_exists(data)) {
gctl_error(req, "File system exists on %s and this "
"operation would destroy it.\nUse -f if you "
"really want to do it.", data);
return;
}
journal = data;
msize = g_get_mediasize(data);
ssize = g_get_sectorsize(data);
if (jsize == -1) {
/*
* No journal size specified. 1GB should be safe
* default.
*/
jsize = 1073741824ULL;
} else {
if (jsize < 104857600) {
gctl_error(req, "Journal too small.");
return;
}
if ((jsize % ssize) != 0) {
gctl_error(req, "Invalid journal size.");
return;
}
}
if (jsize + ssize >= msize) {
gctl_error(req, "Provider too small for journalling. "
"You can try smaller jsize (default is %jd).",
jsize);
return;
}
md.md_jstart = msize - ssize - jsize;
md.md_jend = msize - ssize;
break;
case 2:
if (!force && g_journal_fs_using_last_sector(data)) {
gctl_error(req, "File system on %s is using the last "
"sector and this operation is going to overwrite "
"it. Use -f if you really want to do it.", data);
return;
}
journal = gctl_get_ascii(req, "arg1");
if (jsize != -1) {
gctl_error(req, "jsize argument is valid only for "
"all-in-one configuration.");
return;
}
msize = g_get_mediasize(journal);
ssize = g_get_sectorsize(journal);
md.md_jstart = 0;
md.md_jend = msize - ssize;
break;
}
if (g_get_sectorsize(data) != g_get_sectorsize(journal)) {
gctl_error(req, "Not equal sector sizes.");
return;
}
/*
* Clear last sector first, to spoil all components if device exists.
*/
for (i = 0; i < nargs; i++) {
str = gctl_get_ascii(req, "arg%d", i);
error = g_metadata_clear(str, NULL);
if (error != 0) {
gctl_error(req, "Cannot clear metadata on %s: %s.", str,
strerror(error));
return;
}
}
/*
* Ok, store metadata.
*/
for (i = 0; i < nargs; i++) {
switch (i) {
case 0:
str = data;
md.md_type = GJ_TYPE_DATA;
if (nargs == 1)
md.md_type |= GJ_TYPE_JOURNAL;
break;
case 1:
str = journal;
md.md_type = GJ_TYPE_JOURNAL;
break;
}
md.md_provsize = g_get_mediasize(str);
assert(md.md_provsize != 0);
if (!hardcode)
bzero(md.md_provider, sizeof(md.md_provider));
else {
if (strncmp(str, _PATH_DEV, sizeof(_PATH_DEV) - 1) == 0)
str += sizeof(_PATH_DEV) - 1;
strlcpy(md.md_provider, str, sizeof(md.md_provider));
}
journal_metadata_encode(&md, sector);
error = g_metadata_store(str, sector, sizeof(sector));
if (error != 0) {
fprintf(stderr, "Cannot store metadata on %s: %s.\n",
str, strerror(error));
gctl_error(req, "Not fully done.");
continue;
}
if (verbose)
printf("Metadata value stored on %s.\n", str);
}
}
static void
journal_clear(struct gctl_req *req)
{
const char *name;
int error, i, nargs;
nargs = gctl_get_int(req, "nargs");
if (nargs < 1) {
gctl_error(req, "Too few arguments.");
return;
}
for (i = 0; i < nargs; i++) {
name = gctl_get_ascii(req, "arg%d", i);
error = g_metadata_clear(name, G_JOURNAL_MAGIC);
if (error != 0) {
fprintf(stderr, "Cannot clear metadata on %s: %s.\n",
name, strerror(error));
gctl_error(req, "Not fully done.");
continue;
}
if (verbose)
printf("Metadata cleared on %s.\n", name);
}
}
static void
journal_dump(struct gctl_req *req)
{
struct g_journal_metadata md, tmpmd;
const char *name;
int error, i, nargs;
nargs = gctl_get_int(req, "nargs");
if (nargs < 1) {
gctl_error(req, "Too few arguments.");
return;
}
for (i = 0; i < nargs; i++) {
name = gctl_get_ascii(req, "arg%d", i);
error = g_metadata_read(name, (u_char *)&tmpmd, sizeof(tmpmd),
G_JOURNAL_MAGIC);
if (error != 0) {
fprintf(stderr, "Cannot read metadata from %s: %s.\n",
name, strerror(error));
gctl_error(req, "Not fully done.");
continue;
}
if (journal_metadata_decode((u_char *)&tmpmd, &md) != 0) {
fprintf(stderr, "MD5 hash mismatch for %s, skipping.\n",
name);
gctl_error(req, "Not fully done.");
continue;
}
printf("Metadata on %s:\n", name);
journal_metadata_dump(&md);
printf("\n");
}
}