int main(int argc, char **argv)
{
struct zbc_device_info info;
struct zbc_device *dev = NULL;
unsigned long long elapsed;
unsigned long long bcount = 0;
unsigned long long brate;
int zidx;
int fd = -1, i;
ssize_t ret = 1;
size_t iosize;
void *iobuf = NULL;
ssize_t sector_count;
unsigned long long ionum = 0, iocount = 0;
struct zbc_zone *zones = NULL;
struct zbc_zone *iozone = NULL;
unsigned int nr_zones;
char *path, *file = NULL;
long long sector_ofst = 0;
long long sector_max = 0;
int flags = O_RDONLY;
/* Check command line */
if (argc < 4) {
usage:
printf("Usage: %s [options] <dev> <zone no> <I/O size (B)>\n"
" Read a zone up to the current write pointer\n"
" or the number of I/O specified is executed\n"
"Options:\n"
" -v : Verbose mode\n"
" -dio : Use direct I/Os\n"
" -nio <num> : Limit the number of I/Os to <num>\n"
" -f <file> : Write the content of the zone to <file>\n"
" If <file> is \"-\", the zone content is\n"
" written to the standard output\n"
" -ofst : sector offset from the start sector of\n"
" the zone (default 0 or write pointer)\n",
argv[0]);
return 1;
}
/* Parse options */
for (i = 1; i < (argc - 1); i++) {
if (strcmp(argv[i], "-v") == 0) {
zbc_set_log_level("debug");
} else if (strcmp(argv[i], "-dio") == 0) {
flags |= O_DIRECT;
} else if (strcmp(argv[i], "-nio") == 0) {
if (i >= (argc - 1))
goto usage;
i++;
ionum = atoi(argv[i]);
if (ionum <= 0) {
fprintf(stderr, "Invalid number of I/Os\n");
return 1;
}
} else if (strcmp(argv[i], "-f") == 0) {
if (i >= (argc - 1))
goto usage;
i++;
file = argv[i];
} else if (strcmp(argv[i], "-ofst") == 0) {
if (i >= (argc - 1))
goto usage;
i++;
sector_ofst = atoll(argv[i]);
if (sector_ofst < 0) {
fprintf(stderr, "Invalid sector offset\n");
return 1;
}
} else if (argv[i][0] == '-') {
fprintf(stderr, "Unknown option \"%s\"\n", argv[i]);
goto usage;
} else {
break;
}
}
if (i != (argc - 3))
goto usage;
/* Get parameters */
path = argv[i];
zidx = atoi(argv[i + 1]);
if (zidx < 0) {
fprintf(stderr, "Invalid zone number %s\n", argv[i + 1]);
return 1;
}
iosize = atol(argv[i + 2]);
if (!iosize) {
fprintf(stderr, "Invalid I/O size %s\n", argv[i + 2]);
return 1;
}
/* Setup signal handler */
signal(SIGQUIT, zbc_read_zone_sigcatcher);
signal(SIGINT, zbc_read_zone_sigcatcher);
signal(SIGTERM, zbc_read_zone_sigcatcher);
/* Open device */
ret = zbc_open(path, flags, &dev);
if (ret != 0) {
if (ret == -ENODEV)
fprintf(stderr,
"Open %s failed (not a zoned block device)\n",
path);
else
fprintf(stderr, "Open %s failed (%s)\n",
path, strerror(-ret));
return 1;
}
zbc_get_device_info(dev, &info);
printf("Device %s:\n", path);
zbc_print_device_info(&info, stdout);
/* Get zone list */
ret = zbc_list_zones(dev, 0, ZBC_RO_ALL, &zones, &nr_zones);
if (ret != 0) {
fprintf(stderr, "zbc_list_zones failed\n");
ret = 1;
goto out;
}
/* Get target zone */
if ((unsigned int)zidx >= nr_zones) {
fprintf(stderr, "Target zone not found\n");
ret = 1;
goto out;
}
iozone = &zones[zidx];
if (zbc_zone_conventional(iozone))
printf("Target zone: Conventional zone %d / %d, "
"sector %llu, %llu sectors\n",
zidx,
nr_zones,
zbc_zone_start(iozone),
zbc_zone_length(iozone));
else
printf("Target zone: Zone %d / %d, type 0x%x (%s), "
"cond 0x%x (%s), rwp %d, non_seq %d, "
"sector %llu, %llu sectors, wp %llu\n",
zidx,
nr_zones,
zbc_zone_type(iozone),
zbc_zone_type_str(zbc_zone_type(iozone)),
zbc_zone_condition(iozone),
zbc_zone_condition_str(zbc_zone_condition(iozone)),
zbc_zone_rwp_recommended(iozone),
zbc_zone_non_seq(iozone),
zbc_zone_start(iozone),
zbc_zone_length(iozone),
zbc_zone_wp(iozone));
/* Check I/O alignment and get an I/O buffer */
if (iosize % info.zbd_lblock_size) {
fprintf(stderr,
"Invalid I/O size %zu (must be a multiple of %u B)\n",
iosize,
(unsigned int) info.zbd_lblock_size);
ret = 1;
goto out;
}
ret = posix_memalign((void **) &iobuf, sysconf(_SC_PAGESIZE), iosize);
if ( ret != 0 ) {
fprintf(stderr, "No memory for I/O buffer (%zu B)\n", iosize);
ret = 1;
goto out;
}
/* Open the file to write, if any */
if (file) {
if (strcmp(file, "-") == 0) {
fd = fileno(stdout);
printf("Writting target zone %d to standard output, "
"%zu B I/Os\n",
zidx, iosize);
} else {
fd = open(file,
O_CREAT | O_TRUNC | O_LARGEFILE | O_WRONLY,
S_IRUSR | S_IWUSR | S_IRGRP);
if (fd < 0) {
fprintf(stderr, "Open file \"%s\" failed %d (%s)\n",
file,
errno,
strerror(errno));
ret = 1;
goto out;
}
printf("Writting target zone %d to file \"%s\", "
"%zu B I/Os\n",
zidx, file, iosize);
}
} else if (!ionum) {
printf("Reading target zone %d, %zu B I/Os\n",
zidx, iosize);
} else {
printf("Reading target zone %d, %llu I/Os of %zu B\n",
zidx, ionum, iosize);
}
if (zbc_zone_sequential_req(iozone) &&
!zbc_zone_full(iozone))
sector_max = zbc_zone_wp(iozone) - zbc_zone_start(iozone);
else
sector_max = zbc_zone_length(iozone);
elapsed = zbc_read_zone_usec();
while (!zbc_read_zone_abort &&
sector_ofst < sector_max) {
/* Read zone */
sector_count = iosize >> 9;
if (sector_ofst + sector_count > sector_max)
sector_count = sector_max - sector_ofst;
ret = zbc_pread(dev, iobuf, sector_count,
zbc_zone_start(iozone) + sector_ofst);
if (ret <= 0) {
fprintf(stderr, "zbc_pread failed %zd (%s)\n",
-ret, strerror(-ret));
ret = 1;
break;
}
sector_count = ret;
if (file) {
/* Write zone data to output file */
ret = write(fd, iobuf, sector_count << 9);
if (ret < 0) {
fprintf(stderr, "Write file \"%s\" failed %d (%s)\n",
file,
errno, strerror(errno));
ret = 1;
break;
}
}
sector_ofst += sector_count;
bcount += sector_count << 9;
iocount++;
ret = 0;
if (ionum > 0 && iocount >= ionum)
break;
}
elapsed = zbc_read_zone_usec() - elapsed;
if (elapsed) {
printf("Read %llu B (%llu I/Os) in %llu.%03llu sec\n",
bcount,
iocount,
elapsed / 1000000,
(elapsed % 1000000) / 1000);
printf(" IOPS %llu\n",
iocount * 1000000 / elapsed);
brate = bcount * 1000000 / elapsed;
printf(" BW %llu.%03llu MB/s\n",
brate / 1000000,
(brate % 1000000) / 1000);
} else {
printf("Read %llu B (%llu I/Os)\n",
bcount,
iocount);
}
out:
if ( file && (fd > 0) ) {
if (fd != fileno(stdout))
close(fd);
if (ret != 0)
unlink(file);
}
if (iobuf)
free(iobuf);
if (zones)
free(zones);
zbc_close(dev);
return ret;
}
int main(int argc,
char **argv)
{
struct zbc_device_info info;
struct zbc_device *dev = NULL;
unsigned long long elapsed;
unsigned long long bcount = 0;
unsigned long long brate;
int zidx;
int fd = -1, i, ret = 1;
size_t iosize;
void *iobuf = NULL;
uint32_t lba_count;
unsigned long long ionum = 0, iocount = 0;
struct zbc_zone *zones = NULL;
struct zbc_zone *iozone = NULL;
unsigned int nr_zones;
char *path, *file = NULL;
long long lba_ofst = 0;
long long lba_max = 0;
int flags = O_RDONLY;
/* Check command line */
if ( argc < 4 ) {
usage:
printf("Usage: %s [options] <dev> <zone no> <I/O size (B)>\n"
" Read a zone up to the current write pointer\n"
" or the number of I/O specified is executed\n"
"Options:\n"
" -v : Verbose mode\n"
" -dio : Use direct I/Os for accessing the device\n"
" -nio <num> : Limit the number of I/O executed to <num>\n"
" -f <file> : Write the content of the zone to <file>\n"
" If <file> is \"-\", the zone content is\n"
" written to the standard output\n"
" -lba : lba offset from the starting lba of the zone <zone no>.\n",
argv[0]);
return( 1 );
}
/* Parse options */
for(i = 1; i < (argc - 1); i++) {
if ( strcmp(argv[i], "-v") == 0 ) {
zbc_set_log_level("debug");
} else if ( strcmp(argv[i], "-dio") == 0 ) {
flags |= O_DIRECT;
} else if ( strcmp(argv[i], "-nio") == 0 ) {
if ( i >= (argc - 1) ) {
goto usage;
}
i++;
ionum = atoi(argv[i]);
if ( ionum <= 0 ) {
fprintf(stderr, "Invalid number of I/Os\n");
return( 1 );
}
} else if ( strcmp(argv[i], "-f") == 0 ) {
if ( i >= (argc - 1) ) {
goto usage;
}
i++;
file = argv[i];
} else if ( strcmp(argv[i], "-lba") == 0 ) {
if ( i >= (argc - 1) ) {
goto usage;
}
i++;
lba_ofst = atoll(argv[i]);
if ( lba_ofst < 0 ) {
fprintf(stderr, "LBA offset has to be greater or equal to 0.\n");
return( 1 );
}
} else if ( argv[i][0] == '-' ) {
fprintf(stderr,
"Unknown option \"%s\"\n",
argv[i]);
goto usage;
} else {
break;
}
}
if ( i != (argc - 3) ) {
goto usage;
}
/* Get parameters */
path = argv[i];
zidx = atoi(argv[i + 1]);
if ( zidx < 0 ) {
fprintf(stderr,
"Invalid zone number %s\n",
argv[i + 1]);
ret = 1;
goto out;
}
iosize = atol(argv[i + 2]);
if ( ! iosize ) {
fprintf(stderr,
"Invalid I/O size %s\n",
argv[i + 2]);
ret = 1;
goto out;
}
/* Setup signal handler */
signal(SIGQUIT, zbc_read_zone_sigcatcher);
signal(SIGINT, zbc_read_zone_sigcatcher);
signal(SIGTERM, zbc_read_zone_sigcatcher);
/* Open device */
ret = zbc_open(path, flags, &dev);
if ( ret != 0 ) {
return( 1 );
}
ret = zbc_get_device_info(dev, &info);
if ( ret < 0 ) {
fprintf(stderr,
"zbc_get_device_info failed\n");
goto out;
}
/* Get zone list */
ret = zbc_list_zones(dev, 0, ZBC_RO_ALL, &zones, &nr_zones);
if ( ret != 0 ) {
fprintf(stderr, "zbc_list_zones failed\n");
ret = 1;
goto out;
}
/* Get target zone */
if ( (unsigned int)zidx >= nr_zones ) {
fprintf(stderr, "Target zone not found\n");
ret = 1;
goto out;
}
iozone = &zones[zidx];
printf("Device %s: %s\n",
path,
info.zbd_vendor_id);
printf(" %s interface, %s disk model\n",
zbc_disk_type_str(info.zbd_type),
zbc_disk_model_str(info.zbd_model));
printf(" %llu logical blocks of %u B\n",
(unsigned long long) info.zbd_logical_blocks,
(unsigned int) info.zbd_logical_block_size);
printf(" %llu physical blocks of %u B\n",
(unsigned long long) info.zbd_physical_blocks,
(unsigned int) info.zbd_physical_block_size);
printf(" %.03F GB capacity\n",
(double) (info.zbd_physical_blocks * info.zbd_physical_block_size) / 1000000000);
printf("Target zone: Zone %d / %d, type 0x%x (%s), cond 0x%x (%s), need_reset %d, "
"non_seq %d, LBA %llu, %llu sectors, wp %llu\n",
zidx,
nr_zones,
zbc_zone_type(iozone),
zbc_zone_type_str(zbc_zone_type(iozone)),
zbc_zone_condition(iozone),
zbc_zone_condition_str(zbc_zone_condition(iozone)),
zbc_zone_need_reset(iozone),
zbc_zone_non_seq(iozone),
zbc_zone_start_lba(iozone),
zbc_zone_length(iozone),
zbc_zone_wp_lba(iozone));
/* Check alignment and get an I/O buffer */
if ( iosize % info.zbd_logical_block_size ) {
fprintf(stderr,
"Invalid I/O size %zu (must be aligned on %u)\n",
iosize,
(unsigned int) info.zbd_logical_block_size);
ret = 1;
goto out;
}
ret = posix_memalign((void **) &iobuf, sysconf(_SC_PAGESIZE), iosize);
if ( ret != 0 ) {
fprintf(stderr,
"No memory for I/O buffer (%zu B)\n",
iosize);
ret = 1;
goto out;
}
/* Open the file to write, if any */
if ( file ) {
if ( strcmp(file, "-") == 0 ) {
fd = fileno(stdout);
printf("Writting target zone %d to standard output, %zu B I/Os\n",
zidx,
iosize);
} else {
fd = open(file, O_CREAT | O_TRUNC | O_LARGEFILE | O_WRONLY, S_IRUSR | S_IWUSR | S_IRGRP);
if ( fd < 0 ) {
fprintf(stderr, "Open file \"%s\" failed %d (%s)\n",
file,
errno,
strerror(errno));
ret = 1;
goto out;
}
printf("Writting target zone %d to file \"%s\", %zu B I/Os\n",
zidx,
file,
iosize);
}
} else if ( ! ionum ) {
printf("Reading target zone %d, %zu B I/Os\n",
zidx,
iosize);
} else {
printf("Reading target zone %d, %llu I/Os of %zu B\n",
zidx,
ionum,
iosize);
}
if ( zbc_zone_sequential_req(iozone)
&& (! zbc_zone_full(iozone)) ) {
lba_max = zbc_zone_wp_lba(iozone) - zbc_zone_start_lba(iozone);
} else {
lba_max = zbc_zone_length(iozone);
}
lba_count = iosize / info.zbd_logical_block_size;
elapsed = zbc_read_zone_usec();
while( (! zbc_read_zone_abort)
&& (lba_ofst < lba_max) ) {
/* Read zone */
if ( (lba_ofst + lba_count) > lba_max ) {
lba_count = lba_max - lba_ofst;
}
ret = zbc_pread(dev, iozone, iobuf, lba_count, lba_ofst);
if ( ret <= 0 ) {
fprintf(stderr, "zbc_pread failed %d (%s)\n",
-ret,
strerror(-ret));
ret = 1;
break;
}
lba_count = ret;
if ( file ) {
/* Write file */
ret = write(fd, iobuf, lba_count * info.zbd_logical_block_size);
if ( ret < 0 ) {
fprintf(stderr, "Write file \"%s\" failed %d (%s)\n",
file,
errno,
strerror(errno));
ret = 1;
break;
}
}
lba_ofst += lba_count;
bcount += lba_count * info.zbd_logical_block_size;
iocount++;
ret = 0;
/* If a number of IO was given as input then
* lba_max = iozone + lba_ofst + ionum
*/
if ( (ionum > 0) && (iocount >= ionum) ) {
break;
}
}
elapsed = zbc_read_zone_usec() - elapsed;
if ( elapsed ) {
printf("Read %llu B (%llu I/Os) in %llu.%03llu sec\n",
bcount,
iocount,
elapsed / 1000000,
(elapsed % 1000000) / 1000);
printf(" IOPS %llu\n",
iocount * 1000000 / elapsed);
brate = bcount * 1000000 / elapsed;
printf(" BW %llu.%03llu MB/s\n",
brate / 1000000,
(brate % 1000000) / 1000);
} else {
printf("Read %llu B (%llu I/Os)\n",
bcount,
iocount);
}
out:
if ( file && (fd > 0) ) {
if ( fd != fileno(stdout) ) {
close(fd);
}
if ( ret != 0 ) {
unlink(file);
}
}
if ( iobuf ) {
free(iobuf);
}
if ( zones ) {
free(zones);
}
zbc_close(dev);
return( ret );
}