| /* |
| * Copyright (c) 2014 Douglas Gilbert. |
| * 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. |
| * 3. The name of the author may not be used to endorse or promote products |
| * derived from this software without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <iostream> |
| #include <vector> |
| #include <map> |
| #include <list> |
| #include <system_error> |
| #include <thread> |
| #include <mutex> |
| #include <chrono> |
| #include <atomic> |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <poll.h> |
| #include <errno.h> |
| #include <ctype.h> |
| #include <time.h> |
| #define __STDC_FORMAT_MACROS 1 |
| #include <inttypes.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include "sg_lib.h" |
| #include "sg_io_linux.h" |
| |
| static const char * version_str = "1.00 20140710"; |
| static const char * util_name = "sg_tst_async"; |
| |
| /* This is a test program for checking the async usage of the Linux sg |
| * driver. Each thread opens 1 file descriptor to the sg device and then |
| * starts up to 16 commands while checking with the poll command for |
| * the completion of those commands. Each command has a unique "pack_id" |
| * which is a sequence starting at 1. Either TEST UNIT UNIT, READ(16) |
| * or WRITE(16) commands are issued. |
| * |
| * This is C++ code with some things from C++11 (e.g. threads) and was |
| * only just able to compile (when some things were reverted) with gcc/g++ |
| * version 4.7.3 found in Ubuntu 13.04 . C++11 "feature complete" support |
| * was not available until g++ version 4.8.1 . It should build okay on |
| * recent distributions. |
| * |
| * The build uses various object files from the <sg3_utils>/lib directory |
| * which is assumed to be a sibling of this examples directory. Those |
| * object files in the lib directory can be built with: |
| * cd <sg3_utils> ; ./configure ; cd lib; make |
| * Then to build sg_tst_async concatenate the next 3 lines: |
| * g++ -Wall -std=c++11 -pthread -I ../include ../lib/sg_lib.o |
| * ../lib/sg_lib_data.o ../lib/sg_io_linux.o -o sg_tst_async |
| * sg_tst_async.cpp |
| * or use the C++ Makefile in that directory: |
| * make -f Makefile.cplus sg_tst_async |
| * |
| * Currently this utility is Linux only and uses the sg driver. The bsg |
| * driver is known to be broken (it doesn't match responses to the |
| * correct file descriptor that requested them) so this utility won't |
| * be extended to bsg until that if fixed. |
| * |
| * BEWARE: this utility will modify a logical block (default LBA 1000) on the |
| * given device when the '-W' option is given. |
| * |
| */ |
| |
| using namespace std; |
| using namespace std::chrono; |
| |
| #define DEF_NUM_PER_THREAD 1000 |
| #define DEF_NUM_THREADS 4 |
| #define DEF_WAIT_MS 10 /* 0: yield; -1: don't wait; -2: sleep(0) */ |
| #define DEF_TIMEOUT_MS 20000 /* 20 seconds */ |
| #define DEF_LB_SZ 512 |
| #define DEF_BLOCKING 0 |
| #define DEF_DIRECT 0 |
| #define DEF_NO_XFER 0 |
| |
| #define Q_PER_FD 16 |
| |
| #ifndef SG_FLAG_Q_AT_TAIL |
| #define SG_FLAG_Q_AT_TAIL 0x10 |
| #endif |
| #ifndef SG_FLAG_Q_AT_HEAD |
| #define SG_FLAG_Q_AT_HEAD 0x20 |
| #endif |
| |
| |
| #define DEF_LBA 1000 |
| |
| #define EBUFF_SZ 256 |
| |
| static mutex console_mutex; |
| static atomic<int> async_starts(0); |
| static atomic<int> async_finishes(0); |
| static atomic<int> ebusy_count(0); |
| static atomic<int> eagain_count(0); |
| static atomic<int> uniq_pack_id(1); |
| |
| static int page_size = 4096; /* rough guess, will ask sysconf() */ |
| |
| enum command2execute {SCSI_TUR, SCSI_READ16, SCSI_WRITE16}; |
| enum blkQDiscipline {BQ_DEFAULT, BQ_AT_HEAD, BQ_AT_TAIL}; |
| |
| struct opts_t { |
| const char * dev_name; |
| bool direct; |
| int num_per_thread; |
| bool block; |
| uint64_t lba; |
| int lb_sz; |
| bool no_xfer; |
| int verbose; |
| int wait_ms; |
| command2execute c2e; |
| blkQDiscipline bqd; |
| }; |
| |
| |
| static void |
| usage(void) |
| { |
| printf("Usage: %s [-d] [-f] [-h] [-l <lba>] [-n <n_per_thr>] [-N]\n" |
| " [-q 0|1] [-R] [-s <lb_sz>] [-t <num_thrs>] " |
| "[-T]\n" |
| " [-v] [-V] [-w <wait_ms>] [-W] " |
| "<sg_disk_device>\n", |
| util_name); |
| printf(" where\n"); |
| printf(" -d do direct_io (def: indirect)\n"); |
| printf(" -f force: any sg device (def: only scsi_debug " |
| "owned)\n"); |
| printf(" WARNING: <lba> written to if '-W' given\n"); |
| printf(" -h print this usage message then exit\n"); |
| printf(" -l <lba> logical block to access (def: %u)\n", |
| DEF_LBA); |
| printf(" -n <n_per_thr> number of commands per thread " |
| "(def: %d)\n", DEF_NUM_PER_THREAD); |
| printf(" -N no data xfer (def: xfer on READ and " |
| "WRITE)\n"); |
| printf(" -q 0|1 0: blk q_at_head; 1: q_at_tail\n"); |
| printf(" -s <lb_sz> logical block size (def: 512)\n"); |
| printf(" -R do READs (def: TUR)\n"); |
| printf(" -t <num_thrs> number of threads (def: %d)\n", |
| DEF_NUM_THREADS); |
| printf(" -T do TEST UNIT READYs (default is TURs)\n"); |
| printf(" -v increase verbosity\n"); |
| printf(" -V print version number then exit\n"); |
| printf(" -w <wait_ms> >0: poll(<wait_ms>); =0: poll(0); (def: " |
| "%d)\n", DEF_WAIT_MS); |
| printf(" -W do WRITEs (def: TUR)\n\n"); |
| printf("Multiple threads do READ(16), WRITE(16) or TEST UNIT READY " |
| "(TUR) SCSI\ncommands. Each thread has its own file descriptor " |
| "and queues up to\n16 commands. One block is transferred by " |
| "each READ and WRITE; zeros\nare written.\n"); |
| } |
| |
| |
| #define TUR_CMD_LEN 6 |
| #define READ16_REPLY_LEN 512 |
| #define READ16_CMD_LEN 16 |
| #define WRITE16_REPLY_LEN 512 |
| #define WRITE16_CMD_LEN 16 |
| |
| /* Returns 0 if command injected okay, else -1 */ |
| static int |
| start_sg3_cmd(int sg_fd, command2execute cmd2exe, int pack_id, uint64_t lba, |
| unsigned char * lbp, int xfer_bytes, int flags) |
| { |
| struct sg_io_hdr pt; |
| unsigned char turCmdBlk[TUR_CMD_LEN] = {0, 0, 0, 0, 0, 0}; |
| unsigned char r16CmdBlk[READ16_CMD_LEN] = |
| {0x88, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0}; |
| unsigned char w16CmdBlk[WRITE16_CMD_LEN] = |
| {0x8a, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0}; |
| unsigned char sense_buffer[64]; |
| const char * np; |
| |
| memset(&pt, 0, sizeof(pt)); |
| switch (cmd2exe) { |
| case SCSI_TUR: |
| np = "TEST UNIT READY"; |
| pt.cmdp = turCmdBlk; |
| pt.cmd_len = sizeof(turCmdBlk); |
| pt.dxfer_direction = SG_DXFER_NONE; |
| break; |
| case SCSI_READ16: |
| np = "READ(16)"; |
| if (lba > 0xffffffff) { |
| r16CmdBlk[2] = (lba >> 56) & 0xff; |
| r16CmdBlk[3] = (lba >> 48) & 0xff; |
| r16CmdBlk[4] = (lba >> 40) & 0xff; |
| r16CmdBlk[5] = (lba >> 32) & 0xff; |
| } |
| r16CmdBlk[6] = (lba >> 24) & 0xff; |
| r16CmdBlk[7] = (lba >> 16) & 0xff; |
| r16CmdBlk[8] = (lba >> 8) & 0xff; |
| r16CmdBlk[9] = lba & 0xff; |
| pt.cmdp = r16CmdBlk; |
| pt.cmd_len = sizeof(r16CmdBlk); |
| pt.dxfer_direction = SG_DXFER_FROM_DEV; |
| pt.dxferp = lbp; |
| pt.dxfer_len = xfer_bytes; |
| break; |
| case SCSI_WRITE16: |
| np = "WRITE(16)"; |
| if (lba > 0xffffffff) { |
| w16CmdBlk[2] = (lba >> 56) & 0xff; |
| w16CmdBlk[3] = (lba >> 48) & 0xff; |
| w16CmdBlk[4] = (lba >> 40) & 0xff; |
| w16CmdBlk[5] = (lba >> 32) & 0xff; |
| } |
| w16CmdBlk[6] = (lba >> 24) & 0xff; |
| w16CmdBlk[7] = (lba >> 16) & 0xff; |
| w16CmdBlk[8] = (lba >> 8) & 0xff; |
| w16CmdBlk[9] = lba & 0xff; |
| pt.cmdp = w16CmdBlk; |
| pt.cmd_len = sizeof(w16CmdBlk); |
| pt.dxfer_direction = SG_DXFER_TO_DEV; |
| pt.dxferp = lbp; |
| pt.dxfer_len = xfer_bytes; |
| break; |
| } |
| pt.interface_id = 'S'; |
| pt.mx_sb_len = sizeof(sense_buffer); |
| pt.sbp = sense_buffer; /* ignored .... */ |
| pt.timeout = DEF_TIMEOUT_MS; |
| pt.pack_id = pack_id; |
| pt.flags = flags; |
| |
| if (write(sg_fd, &pt, sizeof(pt)) < 0) { |
| console_mutex.lock(); |
| cerr << __func__ << ": " << np << " pack_id=" << pack_id; |
| perror(" write(sg)"); |
| console_mutex.unlock(); |
| return -1; |
| } |
| return 0; |
| } |
| |
| static int |
| finish_sg3_cmd(int sg_fd, command2execute cmd2exe, int & pack_id, int wait_ms, |
| unsigned int & eagains) |
| { |
| int ok, res; |
| struct sg_io_hdr pt; |
| unsigned char sense_buffer[64]; |
| const char * np = NULL; |
| |
| memset(&pt, 0, sizeof(pt)); |
| switch (cmd2exe) { |
| case SCSI_TUR: |
| np = "TEST UNIT READY"; |
| break; |
| case SCSI_READ16: |
| np = "READ(16)"; |
| break; |
| case SCSI_WRITE16: |
| np = "WRITE(16)"; |
| break; |
| } |
| pt.interface_id = 'S'; |
| pt.mx_sb_len = sizeof(sense_buffer); |
| pt.sbp = sense_buffer; |
| pt.timeout = DEF_TIMEOUT_MS; |
| pt.pack_id = 0; |
| |
| while (((res = read(sg_fd, &pt, sizeof(pt))) < 0) && |
| (EAGAIN == errno)) { |
| ++eagains; |
| if (wait_ms > 0) |
| this_thread::sleep_for(milliseconds{wait_ms}); |
| else if (0 == wait_ms) |
| this_thread::yield(); |
| else if (-2 == wait_ms) |
| sleep(0); // process yield ?? |
| } |
| if (res < 0) { |
| console_mutex.lock(); |
| perror("do_rd_inc_wr_twice: read(sg, READ_16)"); |
| console_mutex.unlock(); |
| return -1; |
| } |
| /* now for the error processing */ |
| pack_id = pt.pack_id; |
| ok = 0; |
| switch (sg_err_category3(&pt)) { |
| case SG_LIB_CAT_CLEAN: |
| ok = 1; |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| console_mutex.lock(); |
| fprintf(stderr, "%s: Recovered error on %s, continuing\n", |
| __func__, np); |
| console_mutex.unlock(); |
| ok = 1; |
| break; |
| default: /* won't bother decoding other categories */ |
| console_mutex.lock(); |
| sg_chk_n_print3(np, &pt, 1); |
| console_mutex.unlock(); |
| break; |
| } |
| return ok ? 0 : -1; |
| } |
| |
| /* Should have page alignment if direct_io chosen */ |
| static unsigned char * |
| get_aligned_heap(int bytes_at_least) |
| { |
| int n; |
| void * wp; |
| |
| if (bytes_at_least < page_size) |
| n = page_size; |
| else |
| n = bytes_at_least; |
| #if 1 |
| int err = posix_memalign(&wp, page_size, n); |
| if (err) { |
| console_mutex.lock(); |
| fprintf(stderr, "posix_memalign: error [%d] out of memory?\n", err); |
| console_mutex.unlock(); |
| return NULL; |
| } |
| memset(wp, 0, n); |
| return (unsigned char *)wp; |
| #else |
| if (n == page_size) { |
| wp = calloc(page_size, 1); |
| memset(wp, 0, n); |
| return (unsigned char *)wp; |
| } else { |
| console_mutex.lock(); |
| fprintf(stderr, "get_aligned_heap: too fiddly to align, choose " |
| "smaller lb_sz\n"); |
| console_mutex.unlock(); |
| return NULL; |
| } |
| #endif |
| } |
| |
| static void |
| work_thread(int id, struct opts_t * op) |
| { |
| int thr_async_starts = 0; |
| int thr_async_finishes = 0; |
| unsigned int thr_eagain_count = 0; |
| int k, res, sg_fd, num_outstanding, do_inc, num, pack_id, sg_flags; |
| int open_flags = O_RDWR; |
| char ebuff[EBUFF_SZ]; |
| unsigned char * lbp; |
| const char * err = NULL; |
| struct pollfd pfd; |
| list<unsigned char *> free_lst; |
| map<int, unsigned char *> pi_map; |
| |
| if (op->verbose) { |
| console_mutex.lock(); |
| cerr << "Enter work_thread id=" << id << endl; |
| console_mutex.unlock(); |
| } |
| if (! op->block) |
| open_flags |= O_NONBLOCK; |
| |
| sg_fd = open(op->dev_name, open_flags); |
| if (sg_fd < 0) { |
| snprintf(ebuff, EBUFF_SZ, "%s: id=%d, error opening file: %s", |
| __func__, id, op->dev_name); |
| console_mutex.lock(); |
| perror(ebuff); |
| console_mutex.unlock(); |
| return; |
| } |
| pfd.fd = sg_fd; |
| pfd.events = POLLIN; |
| sg_flags = 0; |
| if (BQ_AT_TAIL == op->bqd) |
| sg_flags |= SG_FLAG_Q_AT_TAIL; |
| else if (BQ_AT_HEAD == op->bqd) |
| sg_flags |= SG_FLAG_Q_AT_HEAD; |
| if (op->direct) |
| sg_flags |= SG_FLAG_DIRECT_IO; |
| if (op->no_xfer) |
| sg_flags |= SG_FLAG_NO_DXFER; |
| if (op->verbose > 1) { |
| console_mutex.lock(); |
| fprintf(stderr, "sg_flags=0x%x, %s cmd\n", sg_flags, |
| ((SCSI_TUR != op->c2e) ? "TUR": "IO")); |
| console_mutex.unlock(); |
| } |
| |
| num = op->num_per_thread; |
| for (k = 0, num_outstanding = 0; (k < num) || num_outstanding; |
| k = do_inc ? k + 1 : k) { |
| do_inc = 0; |
| if ((num_outstanding < Q_PER_FD) && (k < num)) { |
| do_inc = 1; |
| pack_id = uniq_pack_id.fetch_add(1); |
| if (SCSI_TUR != op->c2e) { |
| if (free_lst.empty()) { |
| lbp = get_aligned_heap(op->lb_sz); |
| if (NULL == lbp) { |
| err = "out of memory"; |
| break; |
| } |
| } else { |
| lbp = free_lst.back(); |
| free_lst.pop_back(); |
| } |
| } else |
| lbp = NULL; |
| if (start_sg3_cmd(sg_fd, op->c2e, pack_id, op->lba, lbp, |
| op->lb_sz, sg_flags)) { |
| err = "start_sg3_cmd() failed"; |
| break; |
| } |
| ++thr_async_starts; |
| ++num_outstanding; |
| pi_map[pack_id] = lbp; |
| /* check if any responses, don't wait */ |
| res = poll(&pfd, 1, 0); |
| if (res < 0) { |
| err = "poll(0) failed"; |
| break; |
| } |
| } else { |
| /* check if any responses, wait as requested */ |
| res = poll(&pfd, 1, ((op->wait_ms > 0) ? op->wait_ms : 0)); |
| if (res < 0) { |
| err = "poll(wait_ms) failed"; |
| break; |
| } |
| } |
| if (0 == res) |
| continue; |
| while (res-- > 0) { |
| if (finish_sg3_cmd(sg_fd, op->c2e, pack_id, op->wait_ms, |
| thr_eagain_count)) { |
| err = "finish_sg3_cmd() failed"; |
| break; |
| } |
| ++thr_async_finishes; |
| --num_outstanding; |
| auto p = pi_map.find(pack_id); |
| |
| if (p == pi_map.end()) { |
| snprintf(ebuff, sizeof(ebuff), "pack_id=%d from " |
| "finish_sg3_cmd() not found\n", pack_id); |
| err = ebuff; |
| break; |
| } else { |
| lbp = p->second; |
| pi_map.erase(p); |
| if (lbp) |
| free_lst.push_front(lbp); |
| } |
| } |
| } |
| close(sg_fd); |
| if (err || (k < num) || (op->verbose > 0)) { |
| console_mutex.lock(); |
| if (k < num) { |
| cerr << "thread id=" << id << " FAILed at iteration: " << k; |
| if (err) |
| cerr << " Reason: " << err << endl; |
| else |
| cerr << endl; |
| } else { |
| if (err) |
| cerr << "thread id=" << id << " FAILed on last, " << |
| "Reason: " << err << endl; |
| else |
| cerr << "thread id=" << id << " normal exit" << '\n'; |
| } |
| console_mutex.unlock(); |
| } |
| k = pi_map.size(); |
| if (k > 0) { |
| console_mutex.lock(); |
| cerr << "thread id=" << id << " Still " << k << " elements " << |
| "in pack_id map on exit" << endl; |
| console_mutex.unlock(); |
| } |
| while (! free_lst.empty()) { |
| lbp = free_lst.back(); |
| free_lst.pop_back(); |
| if (lbp) |
| free(lbp); |
| } |
| async_starts += thr_async_starts; |
| async_finishes += thr_async_finishes; |
| eagain_count += thr_eagain_count; |
| } |
| |
| #define INQ_REPLY_LEN 96 |
| #define INQ_CMD_LEN 6 |
| |
| /* Send INQUIRY and fetches response. If okay puts PRODUCT ID field |
| * in b (up to m_blen bytes). Does not use O_EXCL flag. Returns 0 on success, |
| * else -1 . */ |
| static int |
| do_inquiry_prod_id(const char * dev_name, int block, char * b, int b_mlen) |
| { |
| int sg_fd, ok, ret; |
| struct sg_io_hdr pt; |
| unsigned char inqCmdBlk [INQ_CMD_LEN] = |
| {0x12, 0, 0, 0, INQ_REPLY_LEN, 0}; |
| unsigned char inqBuff[INQ_REPLY_LEN]; |
| unsigned char sense_buffer[64]; |
| char ebuff[EBUFF_SZ]; |
| int open_flags = O_RDWR; /* O_EXCL | O_RDONLY fails with EPERM */ |
| |
| if (! block) |
| open_flags |= O_NONBLOCK; |
| sg_fd = open(dev_name, open_flags); |
| if (sg_fd < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "do_inquiry_prod_id: error opening file: %s", dev_name); |
| perror(ebuff); |
| return -1; |
| } |
| /* Prepare INQUIRY command */ |
| memset(&pt, 0, sizeof(pt)); |
| pt.interface_id = 'S'; |
| pt.cmd_len = sizeof(inqCmdBlk); |
| /* pt.iovec_count = 0; */ /* memset takes care of this */ |
| pt.mx_sb_len = sizeof(sense_buffer); |
| pt.dxfer_direction = SG_DXFER_FROM_DEV; |
| pt.dxfer_len = INQ_REPLY_LEN; |
| pt.dxferp = inqBuff; |
| pt.cmdp = inqCmdBlk; |
| pt.sbp = sense_buffer; |
| pt.timeout = 20000; /* 20000 millisecs == 20 seconds */ |
| /* pt.flags = 0; */ /* take defaults: indirect IO, etc */ |
| /* pt.pack_id = 0; */ |
| /* pt.usr_ptr = NULL; */ |
| |
| if (ioctl(sg_fd, SG_IO, &pt) < 0) { |
| perror("do_inquiry_prod_id: Inquiry SG_IO ioctl error"); |
| close(sg_fd); |
| return -1; |
| } |
| |
| /* now for the error processing */ |
| ok = 0; |
| switch (sg_err_category3(&pt)) { |
| case SG_LIB_CAT_CLEAN: |
| ok = 1; |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| fprintf(stderr, "Recovered error on INQUIRY, continuing\n"); |
| ok = 1; |
| break; |
| default: /* won't bother decoding other categories */ |
| sg_chk_n_print3("INQUIRY command error", &pt, 1); |
| break; |
| } |
| if (ok) { |
| /* Good, so fetch Product ID from response, copy to 'b' */ |
| if (b_mlen > 0) { |
| if (b_mlen > 16) { |
| memcpy(b, inqBuff + 16, 16); |
| b[16] = '\0'; |
| } else { |
| memcpy(b, inqBuff + 16, b_mlen - 1); |
| b[b_mlen - 1] = '\0'; |
| } |
| } |
| ret = 0; |
| } else |
| ret = -1; |
| close(sg_fd); |
| return ret; |
| } |
| |
| |
| int |
| main(int argc, char * argv[]) |
| { |
| int k, n, res; |
| int force = 0; |
| int64_t ll; |
| unsigned int inq_ebusy_count = 0; |
| int num_threads = DEF_NUM_THREADS; |
| char b[64]; |
| struct timespec start_tm, end_tm; |
| struct opts_t opts; |
| struct opts_t * op; |
| |
| op = &opts; |
| op->dev_name = NULL; |
| op->direct = !! DEF_DIRECT; |
| op->lba = DEF_LBA; |
| op->lb_sz = DEF_LB_SZ;; |
| op->num_per_thread = DEF_NUM_PER_THREAD; |
| op->no_xfer = !! DEF_NO_XFER; |
| op->verbose = 0; |
| op->wait_ms = DEF_WAIT_MS; |
| op->c2e = SCSI_TUR; |
| op->bqd = BQ_DEFAULT; |
| op->block = !! DEF_BLOCKING; |
| page_size = sysconf(_SC_PAGESIZE); |
| |
| for (k = 1; k < argc; ++k) { |
| if (0 == memcmp("-d", argv[k], 2)) |
| op->direct = true; |
| else if (0 == memcmp("-f", argv[k], 2)) |
| ++force; |
| else if (0 == memcmp("-h", argv[k], 2)) { |
| usage(); |
| return 0; |
| } else if (0 == memcmp("-l", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && isdigit(*argv[k])) { |
| ll = sg_get_llnum(argv[k]); |
| if (-1 == ll) { |
| fprintf(stderr, "could not decode lba\n"); |
| return 1; |
| } else |
| op->lba = (uint64_t)ll; |
| } else |
| break; |
| } else if (0 == memcmp("-n", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && isdigit(*argv[k])) |
| op->num_per_thread = atoi(argv[k]); |
| else |
| break; |
| } else if (0 == memcmp("-N", argv[k], 2)) |
| op->no_xfer = true; |
| else if (0 == memcmp("-q", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && isdigit(*argv[k])) { |
| n = atoi(argv[k]); |
| if (0 == n) |
| op->bqd = BQ_AT_HEAD; |
| else if (1 == n) |
| op->bqd = BQ_AT_TAIL; |
| } |
| } else if (0 == memcmp("-R", argv[k], 2)) |
| op->c2e = SCSI_READ16; |
| else if (0 == memcmp("-s", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && isdigit(*argv[k])) { |
| op->lb_sz = atoi(argv[k]); |
| if (op->lb_sz < 256) { |
| cerr << "Strange lb_sz, using 256" << endl; |
| op->lb_sz = 256; |
| } |
| } else |
| break; |
| } else if (0 == memcmp("-t", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && isdigit(*argv[k])) |
| num_threads = atoi(argv[k]); |
| else |
| break; |
| } else if (0 == memcmp("-T", argv[k], 2)) |
| op->c2e = SCSI_TUR; |
| else if (0 == memcmp("-vvvv", argv[k], 5)) |
| op->verbose += 4; |
| else if (0 == memcmp("-vvv", argv[k], 4)) |
| op->verbose += 3; |
| else if (0 == memcmp("-vv", argv[k], 3)) |
| op->verbose += 2; |
| else if (0 == memcmp("-v", argv[k], 2)) |
| ++op->verbose; |
| else if (0 == memcmp("-V", argv[k], 2)) { |
| printf("%s version: %s\n", util_name, version_str); |
| return 0; |
| } else if (0 == memcmp("-w", argv[k], 2)) { |
| ++k; |
| if ((k < argc) && (isdigit(*argv[k]) || ('-' == *argv[k]))) { |
| if ('-' == *argv[k]) |
| op->wait_ms = - atoi(argv[k] + 1); |
| else |
| op->wait_ms = atoi(argv[k]); |
| } else |
| break; |
| } else if (0 == memcmp("-W", argv[k], 2)) |
| op->c2e = SCSI_WRITE16; |
| else if (*argv[k] == '-') { |
| printf("Unrecognized switch: %s\n", argv[k]); |
| op->dev_name = NULL; |
| break; |
| } |
| else if (! op->dev_name) |
| op->dev_name = argv[k]; |
| else { |
| printf("too many arguments\n"); |
| op->dev_name = NULL; |
| break; |
| } |
| } |
| if (0 == op->dev_name) { |
| usage(); |
| return 1; |
| } |
| try { |
| struct stat a_stat; |
| |
| if (stat(op->dev_name, &a_stat) < 0) { |
| perror("stat() on dev_name failed"); |
| return 1; |
| } |
| if (! S_ISCHR(a_stat.st_mode)) { |
| fprintf(stderr, "%s should be a sg device which is a char " |
| "device. %s\n", op->dev_name, op->dev_name); |
| fprintf(stderr, "is not a char device and damage could be done " |
| "if it is a BLOCK\ndevice, exiting ...\n"); |
| return 1; |
| } |
| if (! force) { |
| res = do_inquiry_prod_id(op->dev_name, op->block, b, sizeof(b)); |
| if (res) { |
| fprintf(stderr, "INQUIRY failed on %s\n", op->dev_name); |
| return 1; |
| } |
| // For safety, since <lba> written to, only permit scsi_debug |
| // devices. Bypass this with '-f' option. |
| if (0 != memcmp("scsi_debug", b, 10)) { |
| fprintf(stderr, "Since this utility writes to LBA 0x%" PRIx64 |
| ", only devices with scsi_debug\n" |
| "product ID accepted\n", op->lba); |
| return 2; |
| } |
| ebusy_count += inq_ebusy_count; |
| } |
| start_tm.tv_sec = 0; |
| start_tm.tv_nsec = 0; |
| if (clock_gettime(CLOCK_MONOTONIC, &start_tm) < 0) |
| perror("clock_gettime failed"); |
| |
| vector<thread *> vt; |
| |
| for (k = 0; k < num_threads; ++k) { |
| thread * tp = new thread {work_thread, k, op}; |
| vt.push_back(tp); |
| } |
| |
| // g++ 4.7.3 didn't like range-for loop here |
| for (k = 0; k < (int)vt.size(); ++k) |
| vt[k]->join(); |
| |
| for (k = 0; k < (int)vt.size(); ++k) |
| delete vt[k]; |
| |
| n = uniq_pack_id.load() - 1; |
| if ((n > 0) && (0 == clock_gettime(CLOCK_MONOTONIC, &end_tm))) { |
| struct timespec res_tm; |
| double a, b; |
| |
| res_tm.tv_sec = end_tm.tv_sec - start_tm.tv_sec; |
| res_tm.tv_nsec = end_tm.tv_nsec - start_tm.tv_nsec; |
| if (res_tm.tv_nsec < 0) { |
| --res_tm.tv_sec; |
| res_tm.tv_nsec += 1000000000; |
| } |
| a = res_tm.tv_sec; |
| a += (0.000001 * (res_tm.tv_nsec / 1000)); |
| b = (double)n; |
| if (a > 0.000001) { |
| printf("Time to complete %d commands was %d.%06d seconds\n", |
| n, (int)res_tm.tv_sec, (int)(res_tm.tv_nsec / 1000)); |
| cout << "Implies " << (b / a) << " IOPS" << endl; |
| } |
| } |
| |
| if (op->verbose) { |
| cout << "Number of async_starts: " << async_starts.load() << endl; |
| cout << "Number of async_finishes: " << async_finishes.load() << |
| endl; |
| cout << "Last pack_id: " << n << endl; |
| cout << "Number of EBUSYs: " << ebusy_count.load() << endl; |
| cout << "Number of EAGAINs: " << eagain_count.load() << endl; |
| } |
| } |
| catch(system_error& e) { |
| cerr << "got a system_error exception: " << e.what() << '\n'; |
| auto ec = e.code(); |
| cerr << "category: " << ec.category().name() << '\n'; |
| cerr << "value: " << ec.value() << '\n'; |
| cerr << "message: " << ec.message() << '\n'; |
| cerr << "\nNote: if g++ may need '-pthread' or similar in " |
| "compile/link line" << '\n'; |
| } |
| catch(...) { |
| cerr << "got another exception: " << '\n'; |
| } |
| return 0; |
| } |
