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usr.sbin/fstyp/hammer.c
- This file was added.
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svn:eol-style | null | native \ No newline at end of property |
svn:keywords | null | FreeBSD=%H \ No newline at end of property |
svn:mime-type | null | text/plain \ No newline at end of property |
/*- | |||||
* Copyright (c) 2016 The DragonFly Project | |||||
* All rights reserved. | |||||
* | |||||
* This software was developed by Edward Tomasz Napierala under sponsorship | |||||
* from the FreeBSD Foundation. | |||||
* | |||||
* 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("$FreeBSD$"); | |||||
#include <stdio.h> | |||||
#include <stdlib.h> | |||||
#include <string.h> | |||||
#include <err.h> | |||||
#include <assert.h> | |||||
#include <sys/types.h> | |||||
eadler: nit: I always forget style(9) but I think this is in the wrong place. also sort. | |||||
pfgAuthorUnsubmitted Not Done Inline ActionsThis is the only part I wrote ;). pfg: This is the only part I wrote ;). | |||||
#include "hammer_disk.h" | |||||
#include "fstyp.h" | |||||
static hammer_volume_ondisk_t | |||||
__read_ondisk(FILE *fp) | |||||
{ | |||||
hammer_volume_ondisk_t ondisk; | |||||
ondisk = read_buf(fp, 0, sizeof(*ondisk)); | |||||
if (ondisk == NULL) | |||||
err(1, "failed to read ondisk"); | |||||
return (ondisk); | |||||
} | |||||
static int | |||||
__test_ondisk(const hammer_volume_ondisk_t ondisk) | |||||
{ | |||||
static int count = 0; | |||||
eadlerUnsubmitted Not Done Inline ActionsI'd prefer globals to static variables in functions unless we have good reason eadler: I'd prefer globals to static variables in functions unless we have good reason | |||||
static hammer_uuid_t fsid, fstype; | |||||
static char label[64]; | |||||
eadlerUnsubmitted Not Done Inline Actionswhere is 64 coming from? eadler: where is `64` coming from? | |||||
if (ondisk->vol_signature != HAMMER_FSBUF_VOLUME && | |||||
ondisk->vol_signature != HAMMER_FSBUF_VOLUME_REV) | |||||
return (1); | |||||
eadlerUnsubmitted Not Done Inline Actionscan we name these constants? eadler: can we name these constants? | |||||
if (ondisk->vol_rootvol != HAMMER_ROOT_VOLNO) | |||||
return (2); | |||||
if (ondisk->vol_no < 0 || ondisk->vol_no > HAMMER_MAX_VOLUMES - 1) | |||||
return (3); | |||||
if (ondisk->vol_count < 1 || ondisk->vol_count > HAMMER_MAX_VOLUMES) | |||||
return (4); | |||||
if (count == 0) { | |||||
count = ondisk->vol_count; | |||||
assert(count != 0); | |||||
memcpy(&fsid, &ondisk->vol_fsid, sizeof(fsid)); | |||||
memcpy(&fstype, &ondisk->vol_fstype, sizeof(fstype)); | |||||
strncpy(label, ondisk->vol_label, sizeof(label)); | |||||
} else { | |||||
if (ondisk->vol_count != count) | |||||
return (5); | |||||
if (memcmp(&ondisk->vol_fsid, &fsid, sizeof(fsid))) | |||||
return (6); | |||||
if (memcmp(&ondisk->vol_fstype, &fstype, sizeof(fstype))) | |||||
return (7); | |||||
if (strncmp(ondisk->vol_label, label, sizeof(label))) | |||||
return (8); | |||||
} | |||||
return (0); | |||||
} | |||||
int | |||||
fstyp_hammer(FILE *fp, char *label, size_t size) | |||||
{ | |||||
hammer_volume_ondisk_t ondisk; | |||||
int error = 1; | |||||
ondisk = __read_ondisk(fp); | |||||
if (ondisk->vol_no != HAMMER_ROOT_VOLNO) | |||||
goto done; | |||||
if (ondisk->vol_count != 1) | |||||
goto done; | |||||
if (__test_ondisk(ondisk)) | |||||
goto done; | |||||
strlcpy(label, ondisk->vol_label, size); | |||||
error = 0; | |||||
done: | |||||
free(ondisk); | |||||
return (error); | |||||
} | |||||
static int | |||||
__test_volume(const char *volpath) | |||||
{ | |||||
hammer_volume_ondisk_t ondisk; | |||||
FILE *fp; | |||||
int volno = -1; | |||||
if ((fp = fopen(volpath, "r")) == NULL) | |||||
err(1, "failed to open %s", volpath); | |||||
ondisk = __read_ondisk(fp); | |||||
fclose(fp); | |||||
if (__test_ondisk(ondisk)) | |||||
goto done; | |||||
volno = ondisk->vol_no; | |||||
done: | |||||
free(ondisk); | |||||
return (volno); | |||||
} | |||||
static int | |||||
__fsvtyp_hammer(const char *blkdevs, char *label, size_t size, int partial) | |||||
{ | |||||
hammer_volume_ondisk_t ondisk; | |||||
FILE *fp; | |||||
char *dup, *p, *volpath, x[HAMMER_MAX_VOLUMES]; | |||||
int i, volno, error = 1; | |||||
memset(x, 0, sizeof(x)); | |||||
dup = strdup(blkdevs); | |||||
p = dup; | |||||
while (p) { | |||||
volpath = p; | |||||
if ((p = strchr(p, ':')) != NULL) | |||||
eadlerUnsubmitted Not Done Inline Actionspretty sure you can replace most of this with strtok eadler: pretty sure you can replace most of this with `strtok` | |||||
*p++ = '\0'; | |||||
if ((volno = __test_volume(volpath)) == -1) | |||||
break; | |||||
x[volno]++; | |||||
} | |||||
if ((fp = fopen(volpath, "r")) == NULL) | |||||
err(1, "failed to open %s", volpath); | |||||
ondisk = __read_ondisk(fp); | |||||
fclose(fp); | |||||
free(dup); | |||||
if (volno == -1) | |||||
goto done; | |||||
if (partial) | |||||
goto success; | |||||
for (i = 0; i < HAMMER_MAX_VOLUMES; i++) | |||||
if (x[i] > 1) | |||||
goto done; | |||||
for (i = 0; i < HAMMER_MAX_VOLUMES; i++) | |||||
if (x[i] == 0) | |||||
break; | |||||
if (ondisk->vol_count != i) | |||||
goto done; | |||||
for (; i < HAMMER_MAX_VOLUMES; i++) | |||||
if (x[i] != 0) | |||||
goto done; | |||||
success: | |||||
strlcpy(label, ondisk->vol_label, size); | |||||
error = 0; | |||||
done: | |||||
free(ondisk); | |||||
return (error); | |||||
} | |||||
int | |||||
fsvtyp_hammer(const char *blkdevs, char *label, size_t size) | |||||
{ | |||||
return (__fsvtyp_hammer(blkdevs, label, size, 0)); | |||||
} | |||||
int | |||||
fsvtyp_hammer_partial(const char *blkdevs, char *label, size_t size) | |||||
{ | |||||
return (__fsvtyp_hammer(blkdevs, label, size, 1)); | |||||
} |
nit: I always forget style(9) but I think this is in the wrong place. also sort.