| /* A utility program for copying files. Specialised for "files" that |
| * represent devices that understand the SCSI command set. |
| * |
| * Copyright (C) 1999 - 2022 D. Gilbert and P. Allworth |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| * |
| * SPDX-License-Identifier: GPL-2.0-or-later |
| |
| This program is a specialisation of the Unix "dd" command in which |
| either the input or the output file is a scsi generic device. The block |
| size ('bs') is assumed to be 512 if not given. This program complains if |
| 'ibs' or 'obs' are given with a value that differs from 'bs' (or the |
| default, 512). If 'if' is not given or 'if=-' then stdin is assumed. |
| If 'of' is not given or 'of=-' then stdout assumed. |
| |
| A non-standard argument "bpt" (blocks per transfer) is added to control |
| the maximum number of blocks in each transfer. The default value is 128. |
| For example if "bs=512" and "bpt=32" then a maximum of 32 blocks (16 KiB |
| in this case) is transferred to or from the sg device in a single SCSI |
| command. |
| |
| This version uses memory-mapped transfers (i.e. mmap() call from the user |
| space) to speed transfers. If both sides of copy are sg devices |
| then only the read side will be mmap-ed, while the write side will |
| use normal IO. |
| |
| This version is designed for the Linux kernel 2.4, 2.6, 3, 4 and 5 series. |
| */ |
| |
| #define _XOPEN_SOURCE 600 |
| #ifndef _GNU_SOURCE |
| #define _GNU_SOURCE 1 |
| #endif |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <stdarg.h> |
| #include <stdbool.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <limits.h> |
| #define __STDC_FORMAT_MACROS 1 |
| #include <inttypes.h> |
| #include <sys/ioctl.h> |
| #include <sys/stat.h> |
| #include <sys/time.h> |
| #include <sys/mman.h> |
| #include <sys/sysmacros.h> |
| #ifndef major |
| #include <sys/types.h> |
| #endif |
| #include <linux/major.h> /* for MEM_MAJOR, SCSI_GENERIC_MAJOR, etc */ |
| #include <linux/fs.h> /* for BLKSSZGET and friends */ |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include "sg_lib.h" |
| #include "sg_cmds_basic.h" |
| #include "sg_io_linux.h" |
| #include "sg_unaligned.h" |
| #include "sg_pr2serr.h" |
| |
| |
| static const char * version_str = "1.19 20220118"; |
| |
| #define DEF_BLOCK_SIZE 512 |
| #define DEF_BLOCKS_PER_TRANSFER 128 |
| #define DEF_BLOCKS_PER_2048TRANSFER 32 |
| #define DEF_SCSI_CDBSZ 10 |
| #define MAX_SCSI_CDBSZ 16 |
| #define MAX_BPT_VALUE (1 << 24) /* used for maximum bs as well */ |
| #define MAX_COUNT_SKIP_SEEK (1LL << 48) /* coverity wants upper bound */ |
| |
| #define ME "sgm_dd: " |
| |
| |
| #ifndef SG_FLAG_MMAP_IO |
| #define SG_FLAG_MMAP_IO 4 |
| #endif |
| |
| #define SENSE_BUFF_LEN 64 /* Arbitrary, could be larger */ |
| #define READ_CAP_REPLY_LEN 8 |
| #define RCAP16_REPLY_LEN 32 |
| |
| #define DEF_TIMEOUT 60000 /* 60,000 millisecs == 60 seconds */ |
| |
| #ifndef RAW_MAJOR |
| #define RAW_MAJOR 255 /*unlikely value */ |
| #endif |
| |
| #define FT_OTHER 1 /* filetype other than one of following */ |
| #define FT_SG 2 /* filetype is sg char device */ |
| #define FT_RAW 4 /* filetype is raw char device */ |
| #define FT_DEV_NULL 8 /* either "/dev/null" or "." as filename */ |
| #define FT_ST 16 /* filetype is st char device (tape) */ |
| #define FT_BLOCK 32 /* filetype is a block device */ |
| #define FT_ERROR 64 /* couldn't "stat" file */ |
| |
| #define DEV_NULL_MINOR_NUM 3 |
| |
| #define MIN_RESERVED_SIZE 8192 |
| |
| static int sum_of_resids = 0; |
| |
| static int64_t dd_count = -1; |
| static int64_t req_count = 0; |
| static int64_t in_full = 0; |
| static int in_partial = 0; |
| static int64_t out_full = 0; |
| static int out_partial = 0; |
| static int verbose = 0; |
| static int dry_run = 0; |
| static int progress = 0; /* accept --progress or -p, does nothing */ |
| |
| static bool do_time = false; |
| static bool start_tm_valid = false; |
| static struct timeval start_tm; |
| static int blk_sz = 0; |
| static uint32_t glob_pack_id = 0; /* pre-increment */ |
| |
| static const char * sg_allow_dio = "/sys/module/sg/parameters/allow_dio"; |
| |
| struct flags_t { |
| bool append; |
| bool dio; |
| bool direct; |
| bool dpo; |
| bool dsync; |
| bool excl; |
| bool fua; |
| }; |
| |
| |
| static void |
| install_handler(int sig_num, void (*sig_handler) (int sig)) |
| { |
| struct sigaction sigact; |
| sigaction (sig_num, NULL, &sigact); |
| if (sigact.sa_handler != SIG_IGN) |
| { |
| sigact.sa_handler = sig_handler; |
| sigemptyset (&sigact.sa_mask); |
| sigact.sa_flags = 0; |
| sigaction (sig_num, &sigact, NULL); |
| } |
| } |
| |
| static void |
| print_stats() |
| { |
| if (0 != dd_count) |
| pr2serr(" remaining block count=%" PRId64 "\n", dd_count); |
| pr2serr("%" PRId64 "+%d records in\n", in_full - in_partial, in_partial); |
| pr2serr("%" PRId64 "+%d records out\n", out_full - out_partial, |
| out_partial); |
| } |
| |
| static void |
| calc_duration_throughput(bool contin) |
| { |
| double a, b; |
| struct timeval end_tm, res_tm; |
| |
| if (start_tm_valid && (start_tm.tv_sec || start_tm.tv_usec)) { |
| gettimeofday(&end_tm, NULL); |
| res_tm.tv_sec = end_tm.tv_sec - start_tm.tv_sec; |
| res_tm.tv_usec = end_tm.tv_usec - start_tm.tv_usec; |
| if (res_tm.tv_usec < 0) { |
| --res_tm.tv_sec; |
| res_tm.tv_usec += 1000000; |
| } |
| a = res_tm.tv_sec; |
| a += (0.000001 * res_tm.tv_usec); |
| b = (double)blk_sz * (req_count - dd_count); |
| pr2serr("time to transfer data%s: %d.%06d secs", |
| (contin ? " so far" : ""), (int)res_tm.tv_sec, |
| (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (b > 511)) |
| pr2serr(" at %.2f MB/sec\n", b / (a * 1000000.0)); |
| else |
| pr2serr("\n"); |
| } |
| } |
| |
| static void |
| interrupt_handler(int sig) |
| { |
| struct sigaction sigact; |
| |
| sigact.sa_handler = SIG_DFL; |
| sigemptyset (&sigact.sa_mask); |
| sigact.sa_flags = 0; |
| sigaction (sig, &sigact, NULL); |
| pr2serr("Interrupted by signal,"); |
| print_stats (); |
| if (do_time) |
| calc_duration_throughput(false); |
| kill (getpid (), sig); |
| } |
| |
| static void |
| siginfo_handler(int sig) |
| { |
| if (sig) { ; } /* unused, dummy to suppress warning */ |
| pr2serr("Progress report, continuing ...\n"); |
| print_stats(); |
| if (do_time) |
| calc_duration_throughput(true); |
| } |
| |
| static int |
| dd_filetype(const char * filename) |
| { |
| size_t len = strlen(filename); |
| struct stat st; |
| |
| if ((1 == len) && ('.' == filename[0])) |
| return FT_DEV_NULL; |
| if (stat(filename, &st) < 0) |
| return FT_ERROR; |
| if (S_ISCHR(st.st_mode)) { |
| if ((MEM_MAJOR == major(st.st_rdev)) && |
| (DEV_NULL_MINOR_NUM == minor(st.st_rdev))) |
| return FT_DEV_NULL; |
| if (RAW_MAJOR == major(st.st_rdev)) |
| return FT_RAW; |
| if (SCSI_GENERIC_MAJOR == major(st.st_rdev)) |
| return FT_SG; |
| if (SCSI_TAPE_MAJOR == major(st.st_rdev)) |
| return FT_ST; |
| } else if (S_ISBLK(st.st_mode)) |
| return FT_BLOCK; |
| return FT_OTHER; |
| } |
| |
| static char * |
| dd_filetype_str(int ft, char * buff) |
| { |
| int off = 0; |
| |
| if (FT_DEV_NULL & ft) |
| off += sg_scnpr(buff + off, 32, "null device "); |
| if (FT_SG & ft) |
| off += sg_scnpr(buff + off, 32, "SCSI generic (sg) device "); |
| if (FT_BLOCK & ft) |
| off += sg_scnpr(buff + off, 32, "block device "); |
| if (FT_ST & ft) |
| off += sg_scnpr(buff + off, 32, "SCSI tape device "); |
| if (FT_RAW & ft) |
| off += sg_scnpr(buff + off, 32, "raw device "); |
| if (FT_OTHER & ft) |
| off += sg_scnpr(buff + off, 32, "other (perhaps ordinary file) "); |
| if (FT_ERROR & ft) |
| sg_scnpr(buff + off, 32, "unable to 'stat' file "); |
| return buff; |
| } |
| |
| static void |
| usage() |
| { |
| pr2serr("Usage: sgm_dd [bs=BS] [count=COUNT] [ibs=BS] [if=IFILE]" |
| " [iflag=FLAGS]\n" |
| " [obs=BS] [of=OFILE] [oflag=FLAGS] " |
| "[seek=SEEK] [skip=SKIP]\n" |
| " [--help] [--version]\n\n"); |
| pr2serr(" [bpt=BPT] [cdbsz=6|10|12|16] [dio=0|1] " |
| "[fua=0|1|2|3]\n" |
| " [sync=0|1] [time=0|1] [verbose=VERB] " |
| "[--dry-run] [--verbose]\n\n" |
| " where:\n" |
| " bpt is blocks_per_transfer (default is 128)\n" |
| " bs must be device logical block size (default " |
| "512)\n" |
| " cdbsz size of SCSI READ or WRITE cdb (default is 10)\n" |
| " count number of blocks to copy (def: device size)\n" |
| " dio 0->indirect IO on write, 1->direct IO on write\n" |
| " (only when read side is sg device (using mmap))\n" |
| " fua force unit access: 0->don't(def), 1->OFILE, " |
| "2->IFILE,\n" |
| " 3->OFILE+IFILE\n" |
| " if file or device to read from (def: stdin)\n"); |
| pr2serr(" iflag comma separated list from: [direct,dpo,dsync," |
| "excl,fua,\n" |
| " null]\n" |
| " of file or device to write to (def: stdout), " |
| "OFILE of '.'\n" |
| " treated as /dev/null\n" |
| " oflag comma separated list from: [append,dio,direct," |
| "dpo,dsync,\n" |
| " excl,fua,null]\n" |
| " seek block position to start writing to OFILE\n" |
| " skip block position to start reading from IFILE\n" |
| " sync 0->no sync(def), 1->SYNCHRONIZE CACHE on OFILE " |
| "after copy\n" |
| " time 0->no timing(def), 1->time plus calculate " |
| "throughput\n" |
| " verbose 0->quiet(def), 1->some noise, 2->more noise, " |
| "etc\n" |
| " --dry-run|-d prepare but bypass copy/read\n" |
| " --help|-h print usage message then exit\n" |
| " --verbose|-v increase verbosity\n" |
| " --version|-V print version information then exit\n\n" |
| "Copy from IFILE to OFILE, similar to dd command\n" |
| "specialized for SCSI devices for which mmap-ed IO attempted\n"); |
| } |
| |
| /* Return of 0 -> success, see sg_ll_read_capacity*() otherwise */ |
| static int |
| scsi_read_capacity(int sg_fd, int64_t * num_sect, int * sect_sz) |
| { |
| int res, verb; |
| unsigned int ui; |
| uint8_t rcBuff[RCAP16_REPLY_LEN]; |
| |
| verb = (verbose ? verbose - 1: 0); |
| res = sg_ll_readcap_10(sg_fd, 0, 0, rcBuff, READ_CAP_REPLY_LEN, false, |
| verb); |
| if (0 != res) |
| return res; |
| |
| if ((0xff == rcBuff[0]) && (0xff == rcBuff[1]) && (0xff == rcBuff[2]) && |
| (0xff == rcBuff[3])) { |
| |
| res = sg_ll_readcap_16(sg_fd, 0, 0, rcBuff, RCAP16_REPLY_LEN, false, |
| verb); |
| if (0 != res) |
| return res; |
| *num_sect = sg_get_unaligned_be64(rcBuff + 0) + 1; |
| *sect_sz = sg_get_unaligned_be32(rcBuff + 8); |
| } else { |
| ui = sg_get_unaligned_be32(rcBuff + 0); |
| /* take care not to sign extend values > 0x7fffffff */ |
| *num_sect = (int64_t)ui + 1; |
| *sect_sz = sg_get_unaligned_be32(rcBuff + 4); |
| } |
| if (verb) |
| pr2serr(" number of blocks=%" PRId64 " [0x%" PRIx64 "], block " |
| "size=%d\n", *num_sect, *num_sect, *sect_sz); |
| return 0; |
| } |
| |
| /* Return of 0 -> success, -1 -> failure. BLKGETSIZE64, BLKGETSIZE and */ |
| /* BLKSSZGET macros problematic (from <linux/fs.h> or <sys/mount.h>). */ |
| static int |
| read_blkdev_capacity(int sg_fd, int64_t * num_sect, int * sect_sz) |
| { |
| #ifdef BLKSSZGET |
| if ((ioctl(sg_fd, BLKSSZGET, sect_sz) < 0) && (*sect_sz > 0)) { |
| perror("BLKSSZGET ioctl error"); |
| return -1; |
| } else { |
| #ifdef BLKGETSIZE64 |
| uint64_t ull; |
| |
| if (ioctl(sg_fd, BLKGETSIZE64, &ull) < 0) { |
| |
| perror("BLKGETSIZE64 ioctl error"); |
| return -1; |
| } |
| *num_sect = ((int64_t)ull / (int64_t)*sect_sz); |
| if (verbose > 1) |
| pr2serr(" [bgs64] number of blocks=%" PRId64 " [0x%" PRIx64 |
| "], logical block size=%d\n", *num_sect, *num_sect, |
| *sect_sz); |
| #else |
| unsigned long ul; |
| |
| if (ioctl(sg_fd, BLKGETSIZE, &ul) < 0) { |
| perror("BLKGETSIZE ioctl error"); |
| return -1; |
| } |
| *num_sect = (int64_t)ul; |
| if (verbose > 1) |
| pr2serr(" [bgs] number of blocks=%" PRId64 " [0x%" PRIx64 |
| "], logical block size=%d\n", *num_sect, *num_sect, |
| *sect_sz); |
| #endif |
| } |
| return 0; |
| #else |
| if (verbose) |
| pr2serr(" BLKSSZGET+BLKGETSIZE ioctl not available\n"); |
| *num_sect = 0; |
| *sect_sz = 0; |
| return -1; |
| #endif |
| } |
| |
| static int |
| sg_build_scsi_cdb(uint8_t * cdbp, int cdb_sz, unsigned int blocks, |
| int64_t start_block, bool write_true, bool fua, bool dpo) |
| { |
| int sz_ind; |
| int rd_opcode[] = {0x8, 0x28, 0xa8, 0x88}; |
| int wr_opcode[] = {0xa, 0x2a, 0xaa, 0x8a}; |
| |
| memset(cdbp, 0, cdb_sz); |
| if (dpo) |
| cdbp[1] |= 0x10; |
| if (fua) |
| cdbp[1] |= 0x8; |
| switch (cdb_sz) { |
| case 6: |
| sz_ind = 0; |
| cdbp[0] = (uint8_t)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| sg_put_unaligned_be24(0x1fffff & start_block, cdbp + 1); |
| cdbp[4] = (256 == blocks) ? 0 : (uint8_t)blocks; |
| if (blocks > 256) { |
| pr2serr(ME "for 6 byte commands, maximum number of blocks is " |
| "256\n"); |
| return 1; |
| } |
| if ((start_block + blocks - 1) & (~0x1fffff)) { |
| pr2serr(ME "for 6 byte commands, can't address blocks beyond " |
| "%d\n", 0x1fffff); |
| return 1; |
| } |
| if (dpo || fua) { |
| pr2serr(ME "for 6 byte commands, neither dpo nor fua bits " |
| "supported\n"); |
| return 1; |
| } |
| break; |
| case 10: |
| sz_ind = 1; |
| cdbp[0] = (uint8_t)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| sg_put_unaligned_be32((uint32_t)start_block, cdbp + 2); |
| sg_put_unaligned_be16((uint16_t)blocks, cdbp + 7); |
| if (blocks & (~0xffff)) { |
| pr2serr(ME "for 10 byte commands, maximum number of blocks is " |
| "%d\n", 0xffff); |
| return 1; |
| } |
| break; |
| case 12: |
| sz_ind = 2; |
| cdbp[0] = (uint8_t)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| sg_put_unaligned_be32((uint32_t)start_block, cdbp + 2); |
| sg_put_unaligned_be32((uint32_t)blocks, cdbp + 6); |
| break; |
| case 16: |
| sz_ind = 3; |
| cdbp[0] = (uint8_t)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| sg_put_unaligned_be64((uint64_t)start_block, cdbp + 2); |
| sg_put_unaligned_be32((uint32_t)blocks, cdbp + 10); |
| break; |
| default: |
| pr2serr(ME "expected cdb size of 6, 10, 12, or 16 but got %d\n", |
| cdb_sz); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* Returns 0 -> successful, various SG_LIB_CAT_* positive values, |
| * -2 -> recoverable (ENOMEM), -1 -> unrecoverable error */ |
| static int |
| sg_read(int sg_fd, uint8_t * buff, int blocks, int64_t from_block, |
| int bs, int cdbsz, bool fua, bool dpo, bool do_mmap) |
| { |
| bool print_cdb_after = false; |
| int res; |
| uint8_t rdCmd[MAX_SCSI_CDBSZ]; |
| uint8_t senseBuff[SENSE_BUFF_LEN] SG_C_CPP_ZERO_INIT; |
| struct sg_io_hdr io_hdr; |
| |
| if (sg_build_scsi_cdb(rdCmd, cdbsz, blocks, from_block, false, fua, |
| dpo)) { |
| pr2serr(ME "bad rd cdb build, from_block=%" PRId64 ", blocks=%d\n", |
| from_block, blocks); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| memset(&io_hdr, 0, sizeof(struct sg_io_hdr)); |
| io_hdr.interface_id = 'S'; |
| io_hdr.cmd_len = cdbsz; |
| io_hdr.cmdp = rdCmd; |
| io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| io_hdr.dxfer_len = bs * blocks; |
| if (! do_mmap) |
| io_hdr.dxferp = buff; |
| io_hdr.mx_sb_len = SENSE_BUFF_LEN; |
| io_hdr.sbp = senseBuff; |
| io_hdr.timeout = DEF_TIMEOUT; |
| io_hdr.pack_id = (int)++glob_pack_id; |
| if (do_mmap) |
| io_hdr.flags |= SG_FLAG_MMAP_IO; |
| if (verbose > 2) { |
| char b[128]; |
| |
| pr2serr(" Read cdb: %s\n", |
| sg_get_command_str(rdCmd, cdbsz, false, sizeof(b), b)); |
| } |
| |
| #if 1 |
| while (((res = ioctl(sg_fd, SG_IO, &io_hdr)) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| sleep(1); |
| if (res < 0) { |
| perror(ME "SG_IO error (sg_read)"); |
| return -1; |
| } |
| #else |
| while (((res = write(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| ; |
| if (res < 0) { |
| if (ENOMEM == errno) |
| return -2; |
| perror("reading (wr) on sg device, error"); |
| return -1; |
| } |
| |
| while (((res = read(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| ; |
| if (res < 0) { |
| perror("reading (rd) on sg device, error"); |
| return -1; |
| } |
| #endif |
| if (verbose > 2) |
| pr2serr(" duration=%u ms\n", io_hdr.duration); |
| res = sg_err_category3(&io_hdr); |
| switch (res) { |
| case SG_LIB_CAT_CLEAN: |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| sg_chk_n_print3("Reading, continuing", &io_hdr, verbose > 1); |
| break; |
| case SG_LIB_CAT_NOT_READY: |
| case SG_LIB_CAT_MEDIUM_HARD: |
| return res; |
| case SG_LIB_CAT_ILLEGAL_REQ: |
| if (verbose) |
| print_cdb_after = true; |
| /* FALL THROUGH */ |
| case SG_LIB_CAT_ABORTED_COMMAND: |
| case SG_LIB_CAT_UNIT_ATTENTION: |
| default: |
| sg_chk_n_print3("reading", &io_hdr, verbose > 1); |
| if (print_cdb_after) |
| sg_print_command_len(rdCmd, cdbsz); |
| return res; |
| } |
| sum_of_resids += io_hdr.resid; |
| #ifdef DEBUG |
| pr2serr("duration=%u ms\n", io_hdr.duration); |
| #endif |
| return 0; |
| } |
| |
| /* Returns 0 -> successful, various SG_LIB_CAT_* positive values, |
| * -2 -> recoverable (ENOMEM), -1 -> unrecoverable error */ |
| static int |
| sg_write(int sg_fd, uint8_t * buff, int blocks, int64_t to_block, |
| int bs, int cdbsz, bool fua, bool dpo, bool do_mmap, bool * diop) |
| { |
| bool print_cdb_after = false; |
| int res; |
| uint8_t wrCmd[MAX_SCSI_CDBSZ]; |
| uint8_t senseBuff[SENSE_BUFF_LEN] SG_C_CPP_ZERO_INIT; |
| struct sg_io_hdr io_hdr SG_C_CPP_ZERO_INIT; |
| |
| if (sg_build_scsi_cdb(wrCmd, cdbsz, blocks, to_block, true, fua, dpo)) { |
| pr2serr(ME "bad wr cdb build, to_block=%" PRId64 ", blocks=%d\n", |
| to_block, blocks); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| |
| io_hdr.interface_id = 'S'; |
| io_hdr.cmd_len = cdbsz; |
| io_hdr.cmdp = wrCmd; |
| io_hdr.dxfer_direction = SG_DXFER_TO_DEV; |
| io_hdr.dxfer_len = bs * blocks; |
| if (! do_mmap) |
| io_hdr.dxferp = buff; |
| io_hdr.mx_sb_len = SENSE_BUFF_LEN; |
| io_hdr.sbp = senseBuff; |
| io_hdr.timeout = DEF_TIMEOUT; |
| io_hdr.pack_id = (int)++glob_pack_id; |
| if (do_mmap) |
| io_hdr.flags |= SG_FLAG_MMAP_IO; |
| else if (diop && *diop) |
| io_hdr.flags |= SG_FLAG_DIRECT_IO; |
| if (verbose > 2) { |
| char b[128]; |
| |
| pr2serr(" Write cdb: %s\n", |
| sg_get_command_str(wrCmd, cdbsz, false, sizeof(b), b)); |
| } |
| |
| #if 1 |
| while (((res = ioctl(sg_fd, SG_IO, &io_hdr)) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| sleep(1); |
| if (res < 0) { |
| perror(ME "SG_IO error (sg_write)"); |
| return -1; |
| } |
| #else |
| while (((res = write(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| ; |
| if (res < 0) { |
| if (ENOMEM == errno) |
| return -2; |
| perror("writing (wr) on sg device, error"); |
| return -1; |
| } |
| |
| while (((res = read(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || (EBUSY == errno))) |
| ; |
| if (res < 0) { |
| perror("writing (rd) on sg device, error"); |
| return -1; |
| } |
| #endif |
| if (verbose > 2) |
| pr2serr(" duration=%u ms\n", io_hdr.duration); |
| res = sg_err_category3(&io_hdr); |
| switch (res) { |
| case SG_LIB_CAT_CLEAN: |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| sg_chk_n_print3("Writing, continuing", &io_hdr, verbose > 1); |
| break; |
| case SG_LIB_CAT_NOT_READY: |
| case SG_LIB_CAT_MEDIUM_HARD: |
| return res; |
| case SG_LIB_CAT_ILLEGAL_REQ: |
| if (verbose) |
| print_cdb_after = true; |
| /* FALL THROUGH */ |
| case SG_LIB_CAT_ABORTED_COMMAND: |
| case SG_LIB_CAT_UNIT_ATTENTION: |
| default: |
| sg_chk_n_print3("writing", &io_hdr, verbose > 1); |
| if (print_cdb_after) |
| sg_print_command_len(wrCmd, cdbsz); |
| return res; |
| } |
| if (diop && *diop && |
| ((io_hdr.info & SG_INFO_DIRECT_IO_MASK) != SG_INFO_DIRECT_IO)) |
| *diop = false; /* flag that dio not done (completely) */ |
| return 0; |
| } |
| |
| static int |
| process_flags(const char * arg, struct flags_t * fp) |
| { |
| char buff[256]; |
| char * cp; |
| char * np; |
| |
| strncpy(buff, arg, sizeof(buff)); |
| buff[sizeof(buff) - 1] = '\0'; |
| if ('\0' == buff[0]) { |
| pr2serr("no flag found\n"); |
| return 1; |
| } |
| cp = buff; |
| do { |
| np = strchr(cp, ','); |
| if (np) |
| *np++ = '\0'; |
| if (0 == strcmp(cp, "append")) |
| fp->append = true; |
| else if (0 == strcmp(cp, "dio")) |
| fp->dio = true; |
| else if (0 == strcmp(cp, "direct")) |
| fp->direct = true; |
| else if (0 == strcmp(cp, "dpo")) |
| fp->dpo = true; |
| else if (0 == strcmp(cp, "dsync")) |
| fp->dsync = true; |
| else if (0 == strcmp(cp, "excl")) |
| fp->excl = true; |
| else if (0 == strcmp(cp, "fua")) |
| fp->fua = true; |
| else if (0 == strcmp(cp, "null")) |
| ; |
| else { |
| pr2serr("unrecognised flag: %s\n", cp); |
| return 1; |
| } |
| cp = np; |
| } while (cp); |
| return 0; |
| } |
| |
| /* Returns the number of times 'ch' is found in string 's' given the |
| * string's length. */ |
| static int |
| num_chs_in_str(const char * s, int slen, int ch) |
| { |
| int res = 0; |
| |
| while (--slen >= 0) { |
| if (ch == s[slen]) |
| ++res; |
| } |
| return res; |
| } |
| |
| |
| #define STR_SZ 1024 |
| #define INOUTF_SZ 512 |
| #define EBUFF_SZ 768 |
| |
| int |
| main(int argc, char * argv[]) |
| { |
| bool bpt_given = false; |
| bool cdbsz_given = false; |
| bool do_coe = false; /* dummy, just accept + ignore */ |
| bool do_sync = false; |
| bool verbose_given = false; |
| bool version_given = false; |
| int res, k, t, infd, outfd, blocks, n, flags, blocks_per, err, keylen; |
| int bpt = DEF_BLOCKS_PER_TRANSFER; |
| int ibs = 0; |
| int in_res_sz = 0; |
| int in_sect_sz; |
| int in_type = FT_OTHER; |
| int obs = 0; |
| int out_res_sz = 0; |
| int out_sect_sz; |
| int out_type = FT_OTHER; |
| int num_dio_not_done = 0; |
| int ret = 0; |
| int scsi_cdbsz_in = DEF_SCSI_CDBSZ; |
| int scsi_cdbsz_out = DEF_SCSI_CDBSZ; |
| size_t psz; |
| int64_t in_num_sect = -1; |
| int64_t out_num_sect = -1; |
| int64_t skip = 0; |
| int64_t seek = 0; |
| char * buf; |
| char * key; |
| uint8_t * wrkPos; |
| uint8_t * wrkBuff = NULL; |
| uint8_t * wrkMmap = NULL; |
| char inf[INOUTF_SZ]; |
| char str[STR_SZ]; |
| char outf[INOUTF_SZ]; |
| char ebuff[EBUFF_SZ]; |
| char b[80]; |
| struct flags_t in_flags; |
| struct flags_t out_flags; |
| |
| #if defined(HAVE_SYSCONF) && defined(_SC_PAGESIZE) |
| psz = sysconf(_SC_PAGESIZE); /* POSIX.1 (was getpagesize()) */ |
| #else |
| psz = 4096; /* give up, pick likely figure */ |
| #endif |
| inf[0] = '\0'; |
| outf[0] = '\0'; |
| memset(&in_flags, 0, sizeof(in_flags)); |
| memset(&out_flags, 0, sizeof(out_flags)); |
| |
| for (k = 1; k < argc; k++) { |
| if (argv[k]) |
| snprintf(str, STR_SZ, "%s", argv[k]); |
| else |
| continue; |
| for (key = str, buf = key; *buf && *buf != '=';) |
| buf++; |
| if (*buf) |
| *buf++ = '\0'; |
| keylen = strlen(key); |
| if (0 == strcmp(key,"bpt")) { |
| bpt = sg_get_num(buf); |
| if (-1 == bpt) { |
| pr2serr(ME "bad argument to 'bpt'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| bpt_given = true; |
| } else if (0 == strcmp(key,"bs")) { |
| blk_sz = sg_get_num(buf); |
| if (-1 == blk_sz) { |
| pr2serr(ME "bad argument to 'bs'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp(key,"cdbsz")) { |
| scsi_cdbsz_in = sg_get_num(buf); |
| if ((scsi_cdbsz_in < 6) || (scsi_cdbsz_in > 32)) { |
| pr2serr(ME "'cdbsz' expects 6, 10, 12, 16 or 32\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| scsi_cdbsz_out = scsi_cdbsz_in; |
| cdbsz_given = true; |
| } else if (0 == strcmp(key,"coe")) { |
| do_coe = !! sg_get_num(buf); /* dummy, just accept + ignore */ |
| if (do_coe) { ; } /* unused, dummy to suppress warning */ |
| } else if (0 == strcmp(key,"count")) { |
| if (0 != strcmp("-1", buf)) { |
| dd_count = sg_get_llnum(buf); |
| if ((dd_count < 0) || (dd_count > MAX_COUNT_SKIP_SEEK)) { |
| pr2serr(ME "bad argument to 'count'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } /* treat 'count=-1' as calculate count (same as not given) */ |
| } else if (0 == strcmp(key,"dio")) |
| out_flags.dio = !! sg_get_num(buf); |
| else if (0 == strcmp(key,"fua")) { |
| n = sg_get_num(buf); |
| if (n & 1) |
| out_flags.fua = true; |
| if (n & 2) |
| in_flags.fua = true; |
| } else if (0 == strcmp(key,"ibs")) { |
| ibs = sg_get_num(buf); |
| if ((ibs < 0) || (ibs > MAX_BPT_VALUE)) { |
| pr2serr(ME "bad argument to 'ibs'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (strcmp(key,"if") == 0) { |
| if ('\0' != inf[0]) { |
| pr2serr("Second 'if=' argument??\n"); |
| return SG_LIB_CONTRADICT; |
| } else { |
| memcpy(inf, buf, INOUTF_SZ); |
| inf[INOUTF_SZ - 1] = '\0'; |
| } |
| } else if (0 == strcmp(key, "iflag")) { |
| if (process_flags(buf, &in_flags)) { |
| pr2serr(ME "bad argument to 'iflag'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (strcmp(key,"of") == 0) { |
| if ('\0' != outf[0]) { |
| pr2serr("Second 'of=' argument??\n"); |
| return SG_LIB_CONTRADICT; |
| } else { |
| memcpy(outf, buf, INOUTF_SZ); |
| outf[INOUTF_SZ - 1] = '\0'; |
| } |
| } else if (0 == strcmp(key, "oflag")) { |
| if (process_flags(buf, &out_flags)) { |
| pr2serr(ME "bad argument to 'oflag'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp(key,"obs")) { |
| obs = sg_get_num(buf); |
| if ((obs < 0) || (obs > MAX_BPT_VALUE)) { |
| pr2serr(ME "bad argument to 'obs'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp(key,"seek")) { |
| seek = sg_get_llnum(buf); |
| if ((seek < 0) || (seek > MAX_COUNT_SKIP_SEEK)) { |
| pr2serr(ME "bad argument to 'seek'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp(key,"skip")) { |
| skip = sg_get_llnum(buf); |
| if ((skip < 0) || (skip > MAX_COUNT_SKIP_SEEK)) { |
| pr2serr(ME "bad argument to 'skip'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp(key,"sync")) |
| do_sync = !! sg_get_num(buf); |
| else if (0 == strcmp(key,"time")) |
| do_time = sg_get_num(buf); |
| else if (0 == strncmp(key, "verb", 4)) |
| verbose = sg_get_num(buf); |
| else if ((keylen > 1) && ('-' == key[0]) && ('-' != key[1])) { |
| res = 0; |
| n = num_chs_in_str(key + 1, keylen - 1, 'd'); |
| dry_run += n; |
| res += n; |
| n = num_chs_in_str(key + 1, keylen - 1, 'h'); |
| if (n > 0) { |
| usage(); |
| return 0; |
| } |
| n = num_chs_in_str(key + 1, keylen - 1, 'p'); |
| progress += n; |
| res += n; |
| n = num_chs_in_str(key + 1, keylen - 1, 'v'); |
| verbose += n; |
| res += n; |
| n = num_chs_in_str(key + 1, keylen - 1, 'V'); |
| if (n > 0) |
| version_given = true; |
| res += n; |
| if (res < (keylen - 1)) { |
| pr2serr("Unrecognised short option in '%s', try '--help'\n", |
| key); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if ((0 == strncmp(key, "--dry-run", 9)) || |
| (0 == strncmp(key, "--dry_run", 9))) |
| ++dry_run; |
| else if ((0 == strncmp(key, "--help", 6)) || |
| (0 == strcmp(key, "-?"))) { |
| usage(); |
| return 0; |
| } else if (0 == strncmp(key, "--prog", 6)) |
| ++progress; |
| else if (0 == strncmp(key, "--verb", 6)) |
| ++verbose; |
| else if (0 == strncmp(key, "--vers", 6)) |
| version_given = true; |
| else { |
| pr2serr("Unrecognized option '%s'\n", key); |
| pr2serr("For more information use '--help'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| #ifdef DEBUG |
| pr2serr("In DEBUG mode, "); |
| if (verbose_given && version_given) { |
| pr2serr("but override: '-vV' given, zero verbose and continue\n"); |
| verbose_given = false; |
| version_given = false; |
| verbose = 0; |
| } else if (! verbose_given) { |
| pr2serr("set '-vv'\n"); |
| verbose = 2; |
| } else |
| pr2serr("keep verbose=%d\n", verbose); |
| #else |
| if (verbose_given && version_given) |
| pr2serr("Not in DEBUG mode, so '-vV' has no special action\n"); |
| #endif |
| if (version_given) { |
| pr2serr(ME ": %s\n", version_str); |
| return 0; |
| } |
| |
| if (blk_sz <= 0) { |
| blk_sz = DEF_BLOCK_SIZE; |
| pr2serr("Assume default 'bs' ((logical) block size) of %d bytes\n", |
| blk_sz); |
| } |
| if ((ibs && (ibs != blk_sz)) || (obs && (obs != blk_sz))) { |
| pr2serr("If 'ibs' or 'obs' given must be same as 'bs'\n"); |
| usage(); |
| return SG_LIB_CONTRADICT; |
| } |
| if ((skip < 0) || (seek < 0)) { |
| pr2serr("skip and seek cannot be negative\n"); |
| return SG_LIB_CONTRADICT; |
| } |
| if (out_flags.append && (seek > 0)) { |
| pr2serr("Can't use both append and seek switches\n"); |
| return SG_LIB_CONTRADICT; |
| } |
| if ((bpt < 1) || (bpt > MAX_BPT_VALUE)) { |
| pr2serr("bpt must be > 0 and <= %d\n", MAX_BPT_VALUE); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| /* defaulting transfer size to 128*2048 for CD/DVDs is too large |
| for the block layer in lk 2.6 and results in an EIO on the |
| SG_IO ioctl. So reduce it in that case. */ |
| if ((blk_sz >= 2048) && (! bpt_given)) |
| bpt = DEF_BLOCKS_PER_2048TRANSFER; |
| |
| #ifdef DEBUG |
| pr2serr(ME "if=%s skip=%" PRId64 " of=%s seek=%" PRId64 " count=%" PRId64 |
| "\n", inf, skip, outf, seek, dd_count); |
| #endif |
| install_handler (SIGINT, interrupt_handler); |
| install_handler (SIGQUIT, interrupt_handler); |
| install_handler (SIGPIPE, interrupt_handler); |
| install_handler (SIGUSR1, siginfo_handler); |
| |
| infd = STDIN_FILENO; |
| outfd = STDOUT_FILENO; |
| if (inf[0] && ('-' != inf[0])) { |
| in_type = dd_filetype(inf); |
| if (verbose > 1) |
| pr2serr(" >> Input file type: %s\n", |
| dd_filetype_str(in_type, ebuff)); |
| |
| if (FT_ERROR == in_type) { |
| pr2serr(ME "unable to access %s\n", inf); |
| return SG_LIB_FILE_ERROR; |
| } else if (FT_ST == in_type) { |
| pr2serr(ME "unable to use scsi tape device %s\n", inf); |
| return SG_LIB_FILE_ERROR; |
| } else if (FT_SG == in_type) { |
| flags = O_RDWR | O_NONBLOCK; |
| if (in_flags.direct) |
| flags |= O_DIRECT; |
| if (in_flags.excl) |
| flags |= O_EXCL; |
| if (in_flags.dsync) |
| flags |= O_SYNC; |
| if ((infd = open(inf, flags)) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for sg reading", inf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| res = ioctl(infd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30122)) { |
| pr2serr(ME "sg driver prior to 3.1.22\n"); |
| return SG_LIB_FILE_ERROR; |
| } |
| in_res_sz = blk_sz * bpt; |
| if (0 != (in_res_sz % psz)) /* round up to next page */ |
| in_res_sz = ((in_res_sz / psz) + 1) * psz; |
| if (ioctl(infd, SG_GET_RESERVED_SIZE, &t) < 0) { |
| err = errno; |
| perror(ME "SG_GET_RESERVED_SIZE error"); |
| return sg_convert_errno(err); |
| } |
| if (t < MIN_RESERVED_SIZE) |
| t = MIN_RESERVED_SIZE; |
| if (in_res_sz > t) { |
| if (ioctl(infd, SG_SET_RESERVED_SIZE, &in_res_sz) < 0) { |
| err = errno; |
| perror(ME "SG_SET_RESERVED_SIZE error"); |
| return sg_convert_errno(err); |
| } |
| } |
| wrkMmap = (uint8_t *)mmap(NULL, in_res_sz, |
| PROT_READ | PROT_WRITE, MAP_SHARED, infd, 0); |
| if (MAP_FAILED == wrkMmap) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, |
| ME "error using mmap() on file: %s", inf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| } else { |
| flags = O_RDONLY; |
| if (in_flags.direct) |
| flags |= O_DIRECT; |
| if (in_flags.excl) |
| flags |= O_EXCL; |
| if (in_flags.dsync) |
| flags |= O_SYNC; |
| if ((infd = open(inf, flags)) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for reading", inf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| else if (skip > 0) { |
| off64_t offset = skip; |
| |
| offset *= blk_sz; /* could exceed 32 bits here! */ |
| if (lseek64(infd, offset, SEEK_SET) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, ME "couldn't skip to " |
| "required position on %s", inf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| if (verbose > 1) |
| pr2serr(" >> skip: lseek64 SEEK_SET, byte offset=0x%" |
| PRIx64 "\n", (uint64_t)offset); |
| } |
| } |
| } |
| |
| if (outf[0] && ('-' != outf[0])) { |
| out_type = dd_filetype(outf); |
| if (verbose > 1) |
| pr2serr(" >> Output file type: %s\n", |
| dd_filetype_str(out_type, ebuff)); |
| |
| if (FT_ST == out_type) { |
| pr2serr(ME "unable to use scsi tape device %s\n", outf); |
| return SG_LIB_FILE_ERROR; |
| } |
| else if (FT_SG == out_type) { |
| flags = O_RDWR | O_NONBLOCK; |
| if (out_flags.direct) |
| flags |= O_DIRECT; |
| if (out_flags.excl) |
| flags |= O_EXCL; |
| if (out_flags.dsync) |
| flags |= O_SYNC; |
| if ((outfd = open(outf, flags)) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, ME "could not open %s for " |
| "sg writing", outf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| res = ioctl(outfd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30122)) { |
| pr2serr(ME "sg driver prior to 3.1.22\n"); |
| return SG_LIB_FILE_ERROR; |
| } |
| if (ioctl(outfd, SG_GET_RESERVED_SIZE, &t) < 0) { |
| err = errno; |
| perror(ME "SG_GET_RESERVED_SIZE error"); |
| return sg_convert_errno(err); |
| } |
| if (t < MIN_RESERVED_SIZE) |
| t = MIN_RESERVED_SIZE; |
| out_res_sz = blk_sz * bpt; |
| if (out_res_sz > t) { |
| if (ioctl(outfd, SG_SET_RESERVED_SIZE, &out_res_sz) < 0) { |
| err = errno; |
| perror(ME "SG_SET_RESERVED_SIZE error"); |
| return sg_convert_errno(err); |
| } |
| } |
| if (NULL == wrkMmap) { |
| wrkMmap = (uint8_t *)mmap(NULL, out_res_sz, |
| PROT_READ | PROT_WRITE, MAP_SHARED, outfd, 0); |
| if (MAP_FAILED == wrkMmap) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, |
| ME "error using mmap() on file: %s", outf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| } |
| } |
| else if (FT_DEV_NULL == out_type) |
| outfd = -1; /* don't bother opening */ |
| else { |
| if (FT_RAW != out_type) { |
| flags = O_WRONLY | O_CREAT; |
| if (out_flags.direct) |
| flags |= O_DIRECT; |
| if (out_flags.excl) |
| flags |= O_EXCL; |
| if (out_flags.dsync) |
| flags |= O_SYNC; |
| if (out_flags.append) |
| flags |= O_APPEND; |
| if ((outfd = open(outf, flags, 0666)) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for writing", outf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| } |
| else { |
| if ((outfd = open(outf, O_WRONLY)) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, ME "could not open %s " |
| "for raw writing", outf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| } |
| if (seek > 0) { |
| off64_t offset = seek; |
| |
| offset *= blk_sz; /* could exceed 32 bits here! */ |
| if (lseek64(outfd, offset, SEEK_SET) < 0) { |
| err = errno; |
| snprintf(ebuff, EBUFF_SZ, ME "couldn't seek to " |
| "required position on %s", outf); |
| perror(ebuff); |
| return sg_convert_errno(err); |
| } |
| if (verbose > 1) |
| pr2serr(" >> seek: lseek64 SEEK_SET, byte offset=0x%" |
| PRIx64 "\n", (uint64_t)offset); |
| } |
| } |
| } |
| if ((STDIN_FILENO == infd) && (STDOUT_FILENO == outfd)) { |
| pr2serr("Won't default both IFILE to stdin _and_ OFILE to as " |
| "stdout\n"); |
| pr2serr("For more information use '--help'\n"); |
| return SG_LIB_CONTRADICT; |
| } |
| if (dd_count < 0) { |
| in_num_sect = -1; |
| if (FT_SG == in_type) { |
| res = scsi_read_capacity(infd, &in_num_sect, &in_sect_sz); |
| if (SG_LIB_CAT_UNIT_ATTENTION == res) { |
| pr2serr("Unit attention(in), continuing\n"); |
| res = scsi_read_capacity(infd, &in_num_sect, &in_sect_sz); |
| } else if (SG_LIB_CAT_ABORTED_COMMAND == res) { |
| pr2serr("Aborted command(in), continuing\n"); |
| res = scsi_read_capacity(infd, &in_num_sect, &in_sect_sz); |
| } |
| if (0 != res) { |
| sg_get_category_sense_str(res, sizeof(b), b, verbose); |
| pr2serr("Read capacity (if=%s): %s\n", inf, b); |
| in_num_sect = -1; |
| } |
| } else if (FT_BLOCK == in_type) { |
| if (0 != read_blkdev_capacity(infd, &in_num_sect, &in_sect_sz)) { |
| pr2serr("Unable to read block capacity on %s\n", inf); |
| in_num_sect = -1; |
| } |
| if (blk_sz != in_sect_sz) { |
| pr2serr("logical block size on %s confusion; bs=%d, from " |
| "device=%d\n", inf, blk_sz, in_sect_sz); |
| in_num_sect = -1; |
| } |
| } |
| if (in_num_sect > skip) |
| in_num_sect -= skip; |
| |
| out_num_sect = -1; |
| if (FT_SG == out_type) { |
| res = scsi_read_capacity(outfd, &out_num_sect, &out_sect_sz); |
| if (SG_LIB_CAT_UNIT_ATTENTION == res) { |
| pr2serr("Unit attention(out), continuing\n"); |
| res = scsi_read_capacity(outfd, &out_num_sect, &out_sect_sz); |
| } else if (SG_LIB_CAT_ABORTED_COMMAND == res) { |
| pr2serr("Aborted command(out), continuing\n"); |
| res = scsi_read_capacity(outfd, &out_num_sect, &out_sect_sz); |
| } |
| if (0 != res) { |
| sg_get_category_sense_str(res, sizeof(b), b, verbose); |
| pr2serr("Read capacity (of=%s): %s\n", inf, b); |
| out_num_sect = -1; |
| } |
| } else if (FT_BLOCK == out_type) { |
| if (0 != read_blkdev_capacity(outfd, &out_num_sect, |
| &out_sect_sz)) { |
| pr2serr("Unable to read block capacity on %s\n", outf); |
| out_num_sect = -1; |
| } |
| if (blk_sz != out_sect_sz) { |
| pr2serr("logical block size on %s confusion: bs=%d, from " |
| "device=%d\n", outf, blk_sz, out_sect_sz); |
| out_num_sect = -1; |
| } |
| } |
| if (out_num_sect > seek) |
| out_num_sect -= seek; |
| #ifdef DEBUG |
| pr2serr("Start of loop, count=%" PRId64 ", in_num_sect=%" PRId64 ", " |
| "out_num_sect=%" PRId64 "\n", dd_count, in_num_sect, |
| out_num_sect); |
| #endif |
| if (in_num_sect > 0) { |
| if (out_num_sect > 0) |
| dd_count = (in_num_sect > out_num_sect) ? out_num_sect : |
| in_num_sect; |
| else |
| dd_count = in_num_sect; |
| } |
| else |
| dd_count = out_num_sect; |
| } |
| |
| if (dd_count < 0) { |
| pr2serr("Couldn't calculate count, please give one\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if (! cdbsz_given) { |
| if ((FT_SG == in_type) && (MAX_SCSI_CDBSZ != scsi_cdbsz_in) && |
| (((dd_count + skip) > UINT_MAX) || (bpt > USHRT_MAX))) { |
| pr2serr("Note: SCSI command size increased to 16 bytes (for " |
| "'if')\n"); |
| scsi_cdbsz_in = MAX_SCSI_CDBSZ; |
| } |
| if ((FT_SG == out_type) && (MAX_SCSI_CDBSZ != scsi_cdbsz_out) && |
| (((dd_count + seek) > UINT_MAX) || (bpt > USHRT_MAX))) { |
| pr2serr("Note: SCSI command size increased to 16 bytes (for " |
| "'of')\n"); |
| scsi_cdbsz_out = MAX_SCSI_CDBSZ; |
| } |
| } |
| |
| if (out_flags.dio && (FT_SG != in_type)) { |
| out_flags.dio = false; |
| pr2serr(">>> dio only performed on 'of' side when 'if' is an sg " |
| "device\n"); |
| } |
| if (out_flags.dio) { |
| int fd; |
| char c; |
| |
| if ((fd = open(sg_allow_dio, O_RDONLY)) >= 0) { |
| if (1 == read(fd, &c, 1)) { |
| if ('0' == c) |
| pr2serr(">>> %s set to '0' but should be set to '1' for " |
| "direct IO\n", sg_allow_dio); |
| } |
| close(fd); |
| } |
| } |
| |
| if (wrkMmap) { |
| wrkPos = wrkMmap; |
| } else { |
| wrkPos = (uint8_t *)sg_memalign(blk_sz * bpt, 0, &wrkBuff, |
| verbose > 3); |
| if (NULL == wrkPos) { |
| pr2serr("Not enough user memory\n"); |
| return sg_convert_errno(ENOMEM); |
| } |
| } |
| |
| blocks_per = bpt; |
| #ifdef DEBUG |
| pr2serr("Start of loop, count=%" PRId64 ", blocks_per=%d\n", dd_count, |
| blocks_per); |
| #endif |
| if (dry_run > 0) |
| goto fini; |
| |
| if (do_time) { |
| start_tm.tv_sec = 0; |
| start_tm.tv_usec = 0; |
| gettimeofday(&start_tm, NULL); |
| start_tm_valid = true; |
| } |
| req_count = dd_count; |
| |
| if (verbose && (dd_count > 0) && (! out_flags.dio) && |
| (FT_SG == in_type) && (FT_SG == out_type)) |
| pr2serr("Since both 'if' and 'of' are sg devices, only do mmap-ed " |
| "transfers on 'if'\n"); |
| |
| while (dd_count > 0) { |
| blocks = (dd_count > blocks_per) ? blocks_per : dd_count; |
| if (FT_SG == in_type) { |
| ret = sg_read(infd, wrkPos, blocks, skip, blk_sz, scsi_cdbsz_in, |
| in_flags.fua, in_flags.dpo, true); |
| if ((SG_LIB_CAT_UNIT_ATTENTION == ret) || |
| (SG_LIB_CAT_ABORTED_COMMAND == ret)) { |
| pr2serr("Unit attention or aborted command, continuing " |
| "(r)\n"); |
| ret = sg_read(infd, wrkPos, blocks, skip, blk_sz, |
| scsi_cdbsz_in, in_flags.fua, in_flags.dpo, |
| true); |
| } |
| if (0 != ret) { |
| pr2serr("sg_read failed, skip=%" PRId64 "\n", skip); |
| break; |
| } |
| else |
| in_full += blocks; |
| } |
| else { |
| while (((res = read(infd, wrkPos, blocks * blk_sz)) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || |
| (EBUSY == errno))) |
| ; |
| if (verbose > 2) |
| pr2serr("read(unix): count=%d, res=%d\n", blocks * blk_sz, |
| res); |
| if (ret < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "reading, skip=%" PRId64 " ", |
| skip); |
| perror(ebuff); |
| ret = -1; |
| break; |
| } |
| else if (res < blocks * blk_sz) { |
| dd_count = 0; |
| blocks = res / blk_sz; |
| if ((res % blk_sz) > 0) { |
| blocks++; |
| in_partial++; |
| } |
| } |
| in_full += blocks; |
| } |
| |
| if (0 == blocks) |
| break; /* read nothing so leave loop */ |
| |
| if (FT_SG == out_type) { |
| bool dio_res = out_flags.dio; |
| bool do_mmap = (FT_SG != in_type); |
| |
| ret = sg_write(outfd, wrkPos, blocks, seek, blk_sz, scsi_cdbsz_out, |
| out_flags.fua, out_flags.dpo, do_mmap, &dio_res); |
| if ((SG_LIB_CAT_UNIT_ATTENTION == ret) || |
| (SG_LIB_CAT_ABORTED_COMMAND == ret)) { |
| pr2serr("Unit attention or aborted command, continuing (w)\n"); |
| dio_res = out_flags.dio; |
| ret = sg_write(outfd, wrkPos, blocks, seek, blk_sz, |
| scsi_cdbsz_out, out_flags.fua, out_flags.dpo, |
| do_mmap, &dio_res); |
| } |
| if (0 != ret) { |
| pr2serr("sg_write failed, seek=%" PRId64 "\n", seek); |
| break; |
| } |
| else { |
| out_full += blocks; |
| if (out_flags.dio && (! dio_res)) |
| num_dio_not_done++; |
| } |
| } |
| else if (FT_DEV_NULL == out_type) |
| out_full += blocks; /* act as if written out without error */ |
| else { |
| while (((res = write(outfd, wrkPos, blocks * blk_sz)) < 0) && |
| ((EINTR == errno) || (EAGAIN == errno) || |
| (EBUSY == errno))) |
| ; |
| if (verbose > 2) |
| pr2serr("write(unix): count=%d, res=%d\n", blocks * blk_sz, |
| res); |
| if (res < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "writing, seek=%" PRId64 " ", |
| seek); |
| perror(ebuff); |
| break; |
| } |
| else if (res < blocks * blk_sz) { |
| pr2serr("output file probably full, seek=%" PRId64 " ", seek); |
| blocks = res / blk_sz; |
| out_full += blocks; |
| if ((res % blk_sz) > 0) |
| out_partial++; |
| break; |
| } |
| else |
| out_full += blocks; |
| } |
| if (dd_count > 0) |
| dd_count -= blocks; |
| skip += blocks; |
| seek += blocks; |
| } |
| |
| if (do_time) |
| calc_duration_throughput(false); |
| if (do_sync) { |
| if (FT_SG == out_type) { |
| pr2serr(">> Synchronizing cache on %s\n", outf); |
| res = sg_ll_sync_cache_10(outfd, 0, 0, 0, 0, 0, false, 0); |
| if (SG_LIB_CAT_UNIT_ATTENTION == res) { |
| pr2serr("Unit attention(out), continuing\n"); |
| res = sg_ll_sync_cache_10(outfd, 0, 0, 0, 0, 0, false, 0); |
| } |
| if (0 != res) { |
| sg_get_category_sense_str(res, sizeof(b), b, verbose); |
| pr2serr("Synchronize cache(out): %s\n", b); |
| } |
| } |
| } |
| |
| fini: |
| if (wrkBuff) |
| free(wrkBuff); |
| if ((STDIN_FILENO != infd) && (infd >= 0)) |
| close(infd); |
| if ((STDOUT_FILENO != outfd) && (FT_DEV_NULL != out_type)) { |
| if (outfd >= 0) |
| close(outfd); |
| } |
| if ((0 != dd_count) && (0 == dry_run)) { |
| pr2serr("Some error occurred,"); |
| if (0 == ret) |
| ret = SG_LIB_CAT_OTHER; |
| } |
| print_stats(); |
| if (sum_of_resids) |
| pr2serr(">> Non-zero sum of residual counts=%d\n", sum_of_resids); |
| if (num_dio_not_done) |
| pr2serr(">> dio requested but _not_ done %d times\n", |
| num_dio_not_done); |
| return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; |
| } |
