| #define _XOPEN_SOURCE 500 |
| #define _GNU_SOURCE |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <signal.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/sysmacros.h> |
| #include <sys/mman.h> |
| #include <sys/time.h> |
| #include <linux/major.h> |
| #include <linux/fs.h> /* <sys/mount.h> */ |
| #include "sg_include.h" |
| #include "sg_lib.h" |
| #include "sg_cmds.h" |
| #include "llseek.h" |
| |
| /* A utility program for copying files. Specialised for "files" that |
| * represent devices that understand the SCSI command set. |
| * |
| * Copyright (C) 1999 - 2005 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. |
| |
| This program is a specialisation of the Unix "dd" command in which |
| either the input or the output file is a scsi generic device or a |
| raw 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 IO (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 and 2.6 series. |
| */ |
| |
| static char * version_str = "1.19 20050309"; |
| |
| #define DEF_BLOCK_SIZE 512 |
| #define DEF_BLOCKS_PER_TRANSFER 128 |
| #define DEF_SCSI_CDBSZ 10 |
| #define MAX_SCSI_CDBSZ 16 |
| |
| #define ME "sgm_dd: " |
| |
| /* #define SG_DEBUG */ |
| |
| #ifndef SG_FLAG_MMAP_IO |
| #define SG_FLAG_MMAP_IO 4 |
| #endif |
| |
| #define SENSE_BUFF_LEN 32 /* Arbitrary, could be larger */ |
| #define READ_CAP_REPLY_LEN 8 |
| #define RCAP16_REPLY_LEN 32 |
| |
| #ifndef SERVICE_ACTION_IN |
| #define SERVICE_ACTION_IN 0x9e |
| #endif |
| #ifndef SAI_READ_CAPACITY_16 |
| #define SAI_READ_CAPACITY_16 0x10 |
| #endif |
| |
| #define DEF_TIMEOUT 60000 /* 60,000 millisecs == 60 seconds */ |
| |
| #ifndef RAW_MAJOR |
| #define RAW_MAJOR 255 /*unlikey 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 DEV_NULL_MINOR_NUM 3 |
| |
| static int sum_of_resids = 0; |
| |
| static long long dd_count = -1; |
| static long long in_full = 0; |
| static int in_partial = 0; |
| static long long out_full = 0; |
| static int out_partial = 0; |
| |
| static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio"; |
| |
| |
| 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); |
| } |
| } |
| |
| void print_stats() |
| { |
| if (0 != dd_count) |
| fprintf(stderr, " remaining block count=%lld\n", dd_count); |
| fprintf(stderr, "%lld+%d records in\n", in_full - in_partial, in_partial); |
| fprintf(stderr, "%lld+%d records out\n", out_full - out_partial, |
| out_partial); |
| } |
| |
| 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); |
| fprintf(stderr, "Interrupted by signal,"); |
| print_stats (); |
| kill (getpid (), sig); |
| } |
| |
| static void siginfo_handler(int sig) |
| { |
| sig = sig; /* dummy to stop -W warning messages */ |
| fprintf(stderr, "Progress report, continuing ...\n"); |
| print_stats (); |
| } |
| |
| int dd_filetype(const char * filename) |
| { |
| struct stat st; |
| size_t len = strlen(filename); |
| |
| if ((1 == len) && ('.' == filename[0])) |
| return FT_DEV_NULL; |
| if (stat(filename, &st) < 0) |
| return FT_OTHER; |
| 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; |
| } |
| |
| void usage() |
| { |
| fprintf(stderr, "Usage: " |
| "sgm_dd [if=<infile>] [skip=<n>] [of=<ofile>] [seek=<n>]\n" |
| " [bs=<num>] [bpt=<num>] [count=<n>] [time=<n>]\n" |
| " [cdbsz=6|10|12|16] [fua=0|1|2|3] [sync=0|1]\n" |
| " [dio=0|1] [--version]\n" |
| " 'bs' must be device block size (default 512)\n" |
| " 'bpt' is blocks_per_transfer (default is 128)\n" |
| " 'time' 0->no timing(def), 1->time plus calculate throughput\n" |
| " 'fua' force unit access: 0->don't(def), 1->of, 2->if, 3->of+if\n" |
| " 'sync' 0->no sync(def), 1->SYNCHRONIZE CACHE after xfer\n" |
| " 'cdbsz' size of SCSI READ or WRITE command (default is 10)\n" |
| " 'dio' 0->indirect IO on write, 1->direct IO on write\n" |
| " (only when read side is sg device (using mmap))\n"); |
| } |
| |
| /* Return of 0 -> success, SG_LIB_CAT_INVALID_OP -> invalid opcode, |
| * SG_LIB_CAT_MEDIA_CHANGED -> media changed, SG_LIB_CAT_ILLEGAL_REQ |
| * -> bad field in cdb, -1 -> other failure */ |
| int scsi_read_capacity(int sg_fd, long long * num_sect, int * sect_sz) |
| { |
| int k, res; |
| unsigned char rcBuff[RCAP16_REPLY_LEN]; |
| |
| res = sg_ll_readcap_10(sg_fd, 0, 0, rcBuff, READ_CAP_REPLY_LEN, 0); |
| if (0 != res) |
| return res; |
| |
| if ((0xff == rcBuff[0]) && (0xff == rcBuff[1]) && (0xff == rcBuff[2]) && |
| (0xff == rcBuff[3])) { |
| long long ls; |
| |
| res = sg_ll_readcap_16(sg_fd, 0, 0, rcBuff, RCAP16_REPLY_LEN, 0); |
| if (0 != res) |
| return res; |
| for (k = 0, ls = 0; k < 8; ++k) { |
| ls <<= 8; |
| ls |= rcBuff[k]; |
| } |
| *num_sect = ls + 1; |
| *sect_sz = (rcBuff[8] << 24) | (rcBuff[9] << 16) | |
| (rcBuff[10] << 8) | rcBuff[11]; |
| } else { |
| *num_sect = 1 + ((rcBuff[0] << 24) | (rcBuff[1] << 16) | |
| (rcBuff[2] << 8) | rcBuff[3]); |
| *sect_sz = (rcBuff[4] << 24) | (rcBuff[5] << 16) | |
| (rcBuff[6] << 8) | rcBuff[7]; |
| } |
| return 0; |
| } |
| |
| /* Return of 0 -> success, -1 -> failure. BLKGETSIZE64, BLKGETSIZE and */ |
| /* BLKSSZGET macros problematic (from <linux/fs.h> or <sys/mount.h>). */ |
| int read_blkdev_capacity(int sg_fd, long long * 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 |
| unsigned long long ull; |
| |
| if (ioctl(sg_fd, BLKGETSIZE64, &ull) < 0) { |
| |
| perror("BLKGETSIZE64 ioctl error"); |
| return -1; |
| } |
| *num_sect = ((long long)ull / (long long)*sect_sz); |
| #else |
| unsigned long ul; |
| |
| if (ioctl(sg_fd, BLKGETSIZE, &ul) < 0) { |
| perror("BLKGETSIZE ioctl error"); |
| return -1; |
| } |
| *num_sect = (long long)ul; |
| #endif |
| } |
| return 0; |
| #else |
| *num_sect = 0; |
| *sect_sz = 0; |
| return -1; |
| #endif |
| } |
| |
| int sg_build_scsi_cdb(unsigned char * cdbp, int cdb_sz, unsigned int blocks, |
| long long start_block, int write_true, int fua, |
| int dpo) |
| { |
| int rd_opcode[] = {0x8, 0x28, 0xa8, 0x88}; |
| int wr_opcode[] = {0xa, 0x2a, 0xaa, 0x8a}; |
| int sz_ind; |
| |
| 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] = (unsigned char)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| cdbp[1] = (unsigned char)((start_block >> 16) & 0x1f); |
| cdbp[2] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[3] = (unsigned char)(start_block & 0xff); |
| cdbp[4] = (256 == blocks) ? 0 : (unsigned char)blocks; |
| if (blocks > 256) { |
| fprintf(stderr, ME "for 6 byte commands, maximum number of " |
| "blocks is 256\n"); |
| return 1; |
| } |
| if ((start_block + blocks - 1) & (~0x1fffff)) { |
| fprintf(stderr, ME "for 6 byte commands, can't address blocks" |
| " beyond %d\n", 0x1fffff); |
| return 1; |
| } |
| if (dpo || fua) { |
| fprintf(stderr, ME "for 6 byte commands, neither dpo nor fua" |
| " bits supported\n"); |
| return 1; |
| } |
| break; |
| case 10: |
| sz_ind = 1; |
| cdbp[0] = (unsigned char)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| cdbp[2] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[3] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[4] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[5] = (unsigned char)(start_block & 0xff); |
| cdbp[7] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[8] = (unsigned char)(blocks & 0xff); |
| if (blocks & (~0xffff)) { |
| fprintf(stderr, ME "for 10 byte commands, maximum number of " |
| "blocks is %d\n", 0xffff); |
| return 1; |
| } |
| break; |
| case 12: |
| sz_ind = 2; |
| cdbp[0] = (unsigned char)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| cdbp[2] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[3] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[4] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[5] = (unsigned char)(start_block & 0xff); |
| cdbp[6] = (unsigned char)((blocks >> 24) & 0xff); |
| cdbp[7] = (unsigned char)((blocks >> 16) & 0xff); |
| cdbp[8] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[9] = (unsigned char)(blocks & 0xff); |
| break; |
| case 16: |
| sz_ind = 3; |
| cdbp[0] = (unsigned char)(write_true ? wr_opcode[sz_ind] : |
| rd_opcode[sz_ind]); |
| cdbp[2] = (unsigned char)((start_block >> 56) & 0xff); |
| cdbp[3] = (unsigned char)((start_block >> 48) & 0xff); |
| cdbp[4] = (unsigned char)((start_block >> 40) & 0xff); |
| cdbp[5] = (unsigned char)((start_block >> 32) & 0xff); |
| cdbp[6] = (unsigned char)((start_block >> 24) & 0xff); |
| cdbp[7] = (unsigned char)((start_block >> 16) & 0xff); |
| cdbp[8] = (unsigned char)((start_block >> 8) & 0xff); |
| cdbp[9] = (unsigned char)(start_block & 0xff); |
| cdbp[10] = (unsigned char)((blocks >> 24) & 0xff); |
| cdbp[11] = (unsigned char)((blocks >> 16) & 0xff); |
| cdbp[12] = (unsigned char)((blocks >> 8) & 0xff); |
| cdbp[13] = (unsigned char)(blocks & 0xff); |
| break; |
| default: |
| fprintf(stderr, ME "expected cdb size of 6, 10, 12, or 16 but got" |
| "=%d\n", cdb_sz); |
| return 1; |
| } |
| return 0; |
| } |
| |
| /* -1 -> unrecoverable error, 0 -> successful, 1 -> recoverable (ENOMEM), |
| 2 -> try again */ |
| int sg_read(int sg_fd, unsigned char * buff, int blocks, long long from_block, |
| int bs, int cdbsz, int fua, int do_mmap) |
| { |
| unsigned char rdCmd[MAX_SCSI_CDBSZ]; |
| unsigned char senseBuff[SENSE_BUFF_LEN]; |
| struct sg_io_hdr io_hdr; |
| int res; |
| |
| if (sg_build_scsi_cdb(rdCmd, cdbsz, blocks, from_block, 0, fua, 0)) { |
| fprintf(stderr, ME "bad rd cdb build, from_block=%lld, blocks=%d\n", |
| from_block, blocks); |
| return -1; |
| } |
| 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)from_block; |
| if (do_mmap) |
| io_hdr.flags |= SG_FLAG_MMAP_IO; |
| |
| while (((res = write(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| if (ENOMEM == errno) |
| return 1; |
| perror("reading (wr) on sg device, error"); |
| return -1; |
| } |
| |
| while (((res = read(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| perror("reading (rd) on sg device, error"); |
| return -1; |
| } |
| switch (sg_err_category3(&io_hdr)) { |
| case SG_LIB_CAT_CLEAN: |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| sg_chk_n_print3("Reading, continuing", &io_hdr); |
| break; |
| case SG_LIB_CAT_MEDIA_CHANGED: |
| return 2; |
| default: |
| sg_chk_n_print3("reading", &io_hdr); |
| return -1; |
| } |
| sum_of_resids += io_hdr.resid; |
| #ifdef SG_DEBUG |
| fprintf(stderr, "duration=%u ms\n", io_hdr.duration); |
| #endif |
| return 0; |
| } |
| |
| /* -1 -> unrecoverable error, 0 -> successful, 1 -> recoverable (ENOMEM), |
| 2 -> try again */ |
| int sg_write(int sg_fd, unsigned char * buff, int blocks, long long to_block, |
| int bs, int cdbsz, int fua, int do_mmap, int * diop) |
| { |
| unsigned char wrCmd[MAX_SCSI_CDBSZ]; |
| unsigned char senseBuff[SENSE_BUFF_LEN]; |
| struct sg_io_hdr io_hdr; |
| int res; |
| |
| if (sg_build_scsi_cdb(wrCmd, cdbsz, blocks, to_block, 1, fua, 0)) { |
| fprintf(stderr, ME "bad wr cdb build, to_block=%lld, blocks=%d\n", |
| to_block, blocks); |
| return -1; |
| } |
| |
| memset(&io_hdr, 0, sizeof(struct sg_io_hdr)); |
| 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)to_block; |
| if (do_mmap) |
| io_hdr.flags |= SG_FLAG_MMAP_IO; |
| if (diop && *diop) |
| io_hdr.flags |= SG_FLAG_DIRECT_IO; |
| |
| while (((res = write(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| if (ENOMEM == errno) |
| return 1; |
| perror("writing (wr) on sg device, error"); |
| return -1; |
| } |
| |
| while (((res = read(sg_fd, &io_hdr, sizeof(io_hdr))) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| perror("writing (rd) on sg device, error"); |
| return -1; |
| } |
| switch (sg_err_category3(&io_hdr)) { |
| case SG_LIB_CAT_CLEAN: |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| sg_chk_n_print3("Writing, continuing", &io_hdr); |
| break; |
| case SG_LIB_CAT_MEDIA_CHANGED: |
| return 2; |
| default: |
| sg_chk_n_print3("writing", &io_hdr); |
| return -1; |
| } |
| if (diop && *diop && |
| ((io_hdr.info & SG_INFO_DIRECT_IO_MASK) != SG_INFO_DIRECT_IO)) |
| *diop = 0; /* flag that dio not done (completely) */ |
| return 0; |
| } |
| |
| #define STR_SZ 1024 |
| #define INOUTF_SZ 512 |
| #define EBUFF_SZ 512 |
| |
| |
| int main(int argc, char * argv[]) |
| { |
| long long skip = 0; |
| long long seek = 0; |
| int bs = 0; |
| int ibs = 0; |
| int obs = 0; |
| int bpt = DEF_BLOCKS_PER_TRANSFER; |
| char str[STR_SZ]; |
| char * key; |
| char * buf; |
| char inf[INOUTF_SZ]; |
| int in_type = FT_OTHER; |
| char outf[INOUTF_SZ]; |
| int out_type = FT_OTHER; |
| int res, k, t; |
| int infd, outfd, blocks; |
| unsigned char * wrkPos; |
| unsigned char * wrkBuff = NULL; |
| unsigned char * wrkMmap = NULL; |
| long long in_num_sect = -1; |
| int in_res_sz = 0; |
| long long out_num_sect = -1; |
| int out_res_sz = 0; |
| int do_time = 0; |
| int scsi_cdbsz_in = DEF_SCSI_CDBSZ; |
| int scsi_cdbsz_out = DEF_SCSI_CDBSZ; |
| int do_sync = 0; |
| int do_dio = 0; |
| int num_dio_not_done = 0; |
| int fua_mode = 0; |
| int in_sect_sz, out_sect_sz; |
| char ebuff[EBUFF_SZ]; |
| int blocks_per; |
| long long req_count; |
| size_t psz = getpagesize(); |
| struct timeval start_tm, end_tm; |
| |
| inf[0] = '\0'; |
| outf[0] = '\0'; |
| if (argc < 2) { |
| usage(); |
| return 1; |
| } |
| |
| for(k = 1; k < argc; k++) { |
| if (argv[k]) |
| strncpy(str, argv[k], STR_SZ); |
| else |
| continue; |
| for(key = str, buf = key; *buf && *buf != '=';) |
| buf++; |
| if (*buf) |
| *buf++ = '\0'; |
| if (strcmp(key,"if") == 0) { |
| if ('\0' != inf[0]) { |
| fprintf(stderr, "Second 'if=' argument??\n"); |
| return 1; |
| } else |
| strncpy(inf, buf, INOUTF_SZ); |
| } else if (strcmp(key,"of") == 0) { |
| if ('\0' != outf[0]) { |
| fprintf(stderr, "Second 'of=' argument??\n"); |
| return 1; |
| } else |
| strncpy(outf, buf, INOUTF_SZ); |
| } else if (0 == strcmp(key,"ibs")) { |
| ibs = sg_get_num(buf); |
| if (-1 == ibs) { |
| fprintf(stderr, ME "bad argument to 'ibs'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"obs")) { |
| obs = sg_get_num(buf); |
| if (-1 == obs) { |
| fprintf(stderr, ME "bad argument to 'obs'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"bs")) { |
| bs = sg_get_num(buf); |
| if (-1 == bs) { |
| fprintf(stderr, ME "bad argument to 'bs'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"bpt")) { |
| bpt = sg_get_num(buf); |
| if (-1 == bpt) { |
| fprintf(stderr, ME "bad argument to 'bpt'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"skip")) { |
| skip = sg_get_llnum(buf); |
| if (-1LL == skip) { |
| fprintf(stderr, ME "bad argument to 'skip'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"seek")) { |
| seek = sg_get_llnum(buf); |
| if (-1LL == seek) { |
| fprintf(stderr, ME "bad argument to 'seek'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"count")) { |
| dd_count = sg_get_llnum(buf); |
| if (-1LL == dd_count) { |
| fprintf(stderr, ME "bad argument to 'count'\n"); |
| return 1; |
| } |
| } else if (0 == strcmp(key,"time")) |
| do_time = sg_get_num(buf); |
| else if (0 == strcmp(key,"cdbsz")) { |
| scsi_cdbsz_in = sg_get_num(buf); |
| scsi_cdbsz_out = scsi_cdbsz_in; |
| } else if (0 == strcmp(key,"fua")) |
| fua_mode = sg_get_num(buf); |
| else if (0 == strcmp(key,"sync")) |
| do_sync = sg_get_num(buf); |
| else if (0 == strcmp(key,"dio")) |
| do_dio = sg_get_num(buf); |
| else if (0 == strncmp(key, "--vers", 6)) { |
| fprintf(stderr, ME "for Linux sg version 3 driver: %s\n", |
| version_str); |
| return 0; |
| } |
| else { |
| fprintf(stderr, "Unrecognized argument '%s'\n", key); |
| usage(); |
| return 1; |
| } |
| } |
| if (bs <= 0) { |
| bs = DEF_BLOCK_SIZE; |
| fprintf(stderr, "Assume default 'bs' (block size) of %d bytes\n", bs); |
| } |
| if ((ibs && (ibs != bs)) || (obs && (obs != bs))) { |
| fprintf(stderr, "If 'ibs' or 'obs' given must be same as 'bs'\n"); |
| usage(); |
| return 1; |
| } |
| if ((skip < 0) || (seek < 0)) { |
| fprintf(stderr, "skip and seek cannot be negative\n"); |
| return 1; |
| } |
| if (bpt < 1) { |
| fprintf(stderr, "bpt must be greater than 0\n"); |
| return 1; |
| } |
| #ifdef SG_DEBUG |
| fprintf(stderr, ME "if=%s skip=%lld of=%s seek=%lld count=%lld\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 (FT_ST == in_type) { |
| fprintf(stderr, ME "unable to use scsi tape device %s\n", inf); |
| return 1; |
| } |
| else if (FT_SG == in_type) { |
| if ((infd = open(inf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for sg reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| res = ioctl(infd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30122)) { |
| fprintf(stderr, ME "sg driver prior to 3.1.22\n"); |
| return 1; |
| } |
| in_res_sz = bs * 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) { |
| perror(ME "SG_GET_RESERVED_SIZE error"); |
| return 1; |
| } |
| if (in_res_sz > t) { |
| if (ioctl(infd, SG_SET_RESERVED_SIZE, &in_res_sz) < 0) { |
| perror(ME "SG_SET_RESERVED_SIZE error"); |
| return 1; |
| } |
| } |
| wrkMmap = mmap(NULL, in_res_sz, PROT_READ | PROT_WRITE, |
| MAP_SHARED, infd, 0); |
| if (MAP_FAILED == wrkMmap) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "error using mmap() on file: %s", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| else { |
| if ((infd = open(inf, O_RDONLY)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| else if (skip > 0) { |
| llse_loff_t offset = skip; |
| |
| offset *= bs; /* could exceed 32 bits here! */ |
| if (llse_llseek(infd, offset, SEEK_SET) < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "couldn't skip to " |
| "required position on %s", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| } |
| |
| if (outf[0] && ('-' != outf[0])) { |
| out_type = dd_filetype(outf); |
| |
| if (FT_ST == out_type) { |
| fprintf(stderr, ME "unable to use scsi tape device %s\n", outf); |
| return 1; |
| } |
| else if (FT_SG == out_type) { |
| if ((outfd = open(outf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "could not open %s for " |
| "sg writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| res = ioctl(outfd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30122)) { |
| fprintf(stderr, ME "sg driver prior to 3.1.22\n"); |
| return 1; |
| } |
| if (ioctl(outfd, SG_GET_RESERVED_SIZE, &t) < 0) { |
| perror(ME "SG_GET_RESERVED_SIZE error"); |
| return 1; |
| } |
| out_res_sz = bs * bpt; |
| if (out_res_sz > t) { |
| if (ioctl(outfd, SG_SET_RESERVED_SIZE, &out_res_sz) < 0) { |
| perror(ME "SG_SET_RESERVED_SIZE error"); |
| return 1; |
| } |
| } |
| if (NULL == wrkMmap) { |
| wrkMmap = mmap(NULL, out_res_sz, PROT_READ | PROT_WRITE, |
| MAP_SHARED, outfd, 0); |
| if (MAP_FAILED == wrkMmap) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "error using mmap() on file: %s", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| else if (FT_DEV_NULL == out_type) |
| outfd = -1; /* don't bother opening */ |
| else { |
| if (FT_RAW != out_type) { |
| if ((outfd = open(outf, O_WRONLY | O_CREAT, 0666)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| ME "could not open %s for writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| else { |
| if ((outfd = open(outf, O_WRONLY)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "could not open %s " |
| "for raw writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| if (seek > 0) { |
| llse_loff_t offset = seek; |
| |
| offset *= bs; /* could exceed 32 bits here! */ |
| if (llse_llseek(outfd, offset, SEEK_SET) < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "couldn't seek to " |
| "required position on %s", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| } |
| if ((STDIN_FILENO == infd) && (STDOUT_FILENO == outfd)) { |
| fprintf(stderr, |
| "Can't have both 'if' as stdin _and_ 'of' as stdout\n"); |
| return 1; |
| } |
| 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_MEDIA_CHANGED == res) { |
| fprintf(stderr, |
| "Unit attention, media changed(in), continuing\n"); |
| res = scsi_read_capacity(infd, &in_num_sect, &in_sect_sz); |
| } |
| if (0 != res) { |
| if (res == SG_LIB_CAT_INVALID_OP) |
| fprintf(stderr, "read capacity not supported on %s\n", |
| inf); |
| else |
| fprintf(stderr, "Unable to read capacity on %s\n", inf); |
| in_num_sect = -1; |
| } |
| } else if (FT_BLOCK == in_type) { |
| if (0 != read_blkdev_capacity(infd, &in_num_sect, &in_sect_sz)) { |
| fprintf(stderr, "Unable to read block capacity on %s\n", inf); |
| in_num_sect = -1; |
| } |
| if (bs != in_sect_sz) { |
| fprintf(stderr, "block size on %s confusion; bs=%d, from " |
| "device=%d\n", inf, bs, 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_MEDIA_CHANGED == res) { |
| fprintf(stderr, |
| "Unit attention, media changed(out), continuing\n"); |
| res = scsi_read_capacity(outfd, &out_num_sect, &out_sect_sz); |
| } |
| if (0 != res) { |
| if (res == SG_LIB_CAT_INVALID_OP) |
| fprintf(stderr, "read capacity not supported on %s\n", |
| outf); |
| else |
| fprintf(stderr, "Unable to read capacity on %s\n", outf); |
| out_num_sect = -1; |
| } |
| } else if (FT_BLOCK == out_type) { |
| if (0 != read_blkdev_capacity(outfd, &out_num_sect, |
| &out_sect_sz)) { |
| fprintf(stderr, "Unable to read block capacity on %s\n", |
| outf); |
| out_num_sect = -1; |
| } |
| if (bs != out_sect_sz) { |
| fprintf(stderr, "block size on %s confusion: bs=%d, from " |
| "device=%d\n", outf, bs, out_sect_sz); |
| out_num_sect = -1; |
| } |
| } |
| if (out_num_sect > seek) |
| out_num_sect -= seek; |
| #ifdef SG_DEBUG |
| fprintf(stderr, |
| "Start of loop, count=%lld, in_num_sect=%lld, out_num_sect=%lld\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) { |
| fprintf(stderr, "Couldn't calculate count, please give one\n"); |
| return 1; |
| } |
| if ((FT_SG == in_type) && ((dd_count + skip) > UINT_MAX) && |
| (MAX_SCSI_CDBSZ != scsi_cdbsz_in)) { |
| fprintf(stderr, "Note: SCSI command size increased to 16 bytes " |
| "(for 'if')\n"); |
| scsi_cdbsz_in = MAX_SCSI_CDBSZ; |
| } |
| if ((FT_SG == out_type) && ((dd_count + seek) > UINT_MAX) && |
| (MAX_SCSI_CDBSZ != scsi_cdbsz_out)) { |
| fprintf(stderr, "Note: SCSI command size increased to 16 bytes " |
| "(for 'of')\n"); |
| scsi_cdbsz_out = MAX_SCSI_CDBSZ; |
| } |
| |
| if (do_dio && (FT_SG != in_type)) { |
| do_dio = 0; |
| fprintf(stderr, ">>> dio only performed on 'of' side when 'if' is" |
| " an sg device\n"); |
| } |
| if (do_dio) { |
| int fd; |
| char c; |
| |
| if ((fd = open(proc_allow_dio, O_RDONLY)) >= 0) { |
| if (1 == read(fd, &c, 1)) { |
| if ('0' == c) |
| fprintf(stderr, ">>> %s set to '0' but should be set " |
| "to '1' for direct IO\n", proc_allow_dio); |
| } |
| close(fd); |
| } |
| } |
| |
| if (wrkMmap) |
| wrkPos = wrkMmap; |
| else { |
| if ((FT_RAW == in_type) || (FT_RAW == out_type)) { |
| wrkBuff = malloc(bs * bpt + psz); |
| if (0 == wrkBuff) { |
| fprintf(stderr, "Not enough user memory for raw\n"); |
| return 1; |
| } |
| wrkPos = (unsigned char *)(((unsigned long)wrkBuff + psz - 1) & |
| (~(psz - 1))); |
| } |
| else { |
| wrkBuff = malloc(bs * bpt); |
| if (0 == wrkBuff) { |
| fprintf(stderr, "Not enough user memory\n"); |
| return 1; |
| } |
| wrkPos = wrkBuff; |
| } |
| } |
| |
| blocks_per = bpt; |
| #ifdef SG_DEBUG |
| fprintf(stderr, "Start of loop, count=%lld, blocks_per=%d\n", |
| dd_count, blocks_per); |
| #endif |
| if (do_time) { |
| start_tm.tv_sec = 0; |
| start_tm.tv_usec = 0; |
| gettimeofday(&start_tm, NULL); |
| } |
| req_count = dd_count; |
| |
| while (dd_count > 0) { |
| blocks = (dd_count > blocks_per) ? blocks_per : dd_count; |
| if (FT_SG == in_type) { |
| int fua = fua_mode & 2; |
| |
| res = sg_read(infd, wrkPos, blocks, skip, bs, scsi_cdbsz_in, |
| fua, 1); |
| if (2 == res) { |
| fprintf(stderr, |
| "Unit attention, media changed, continuing (r)\n"); |
| res = sg_read(infd, wrkPos, blocks, skip, bs, scsi_cdbsz_in, |
| fua, 1); |
| } |
| if (0 != res) { |
| fprintf(stderr, "sg_read failed, skip=%lld\n", skip); |
| break; |
| } |
| else |
| in_full += blocks; |
| } |
| else { |
| while (((res = read(infd, wrkPos, blocks * bs)) < 0) && |
| (EINTR == errno)) |
| ; |
| if (res < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "reading, skip=%lld ", skip); |
| perror(ebuff); |
| break; |
| } |
| else if (res < blocks * bs) { |
| dd_count = 0; |
| blocks = res / bs; |
| if ((res % bs) > 0) { |
| blocks++; |
| in_partial++; |
| } |
| } |
| in_full += blocks; |
| } |
| |
| if (0 == blocks) |
| break; /* read nothing so leave loop */ |
| |
| if (FT_SG == out_type) { |
| int do_mmap = (FT_SG == in_type) ? 0 : 1; |
| int fua = fua_mode & 1; |
| int dio_res = do_dio; |
| |
| res = sg_write(outfd, wrkPos, blocks, seek, bs, scsi_cdbsz_out, |
| fua, do_mmap, &dio_res); |
| if (2 == res) { |
| fprintf(stderr, |
| "Unit attention, media changed, continuing (w)\n"); |
| res = sg_write(outfd, wrkPos, blocks, seek, bs, scsi_cdbsz_out, |
| fua, do_mmap, &dio_res); |
| } |
| else if (0 != res) { |
| fprintf(stderr, "sg_write failed, seek=%lld\n", seek); |
| break; |
| } |
| else { |
| out_full += blocks; |
| if (do_dio && (0 == 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 * bs)) < 0) |
| && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| snprintf(ebuff, EBUFF_SZ, ME "writing, seek=%lld ", seek); |
| perror(ebuff); |
| break; |
| } |
| else if (res < blocks * bs) { |
| fprintf(stderr, "output file probably full, seek=%lld ", seek); |
| blocks = res / bs; |
| out_full += blocks; |
| if ((res % bs) > 0) |
| out_partial++; |
| break; |
| } |
| else |
| out_full += blocks; |
| } |
| if (dd_count > 0) |
| dd_count -= blocks; |
| skip += blocks; |
| seek += blocks; |
| } |
| if ((do_time) && (start_tm.tv_sec || start_tm.tv_usec)) { |
| struct timeval res_tm; |
| double a, b; |
| |
| 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)bs * (req_count - dd_count); |
| fprintf(stderr, "time to transfer data was %d.%06d secs", |
| (int)res_tm.tv_sec, (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (b > 511)) |
| fprintf(stderr, ", %.2f MB/sec\n", b / (a * 1000000.0)); |
| else |
| fprintf(stderr, "\n"); |
| } |
| if (do_sync) { |
| if (FT_SG == out_type) { |
| fprintf(stderr, ">> Synchronizing cache on %s\n", outf); |
| res = sg_ll_sync_cache_10(outfd, 0, 0, 0, 0, 0, 0, 0); |
| if (2 == res) { |
| fprintf(stderr, |
| "Unit attention, media changed(in), continuing\n"); |
| res = sg_ll_sync_cache_10(outfd, 0, 0, 0, 0, 0, 0, 0); |
| } |
| if (0 != res) |
| fprintf(stderr, "Unable to synchronize cache\n"); |
| } |
| } |
| |
| if (wrkBuff) free(wrkBuff); |
| if (STDIN_FILENO != infd) |
| close(infd); |
| if ((STDOUT_FILENO != outfd) && (FT_DEV_NULL != out_type)) |
| close(outfd); |
| res = 0; |
| if (0 != dd_count) { |
| fprintf(stderr, "Some error occurred,"); |
| res = 2; |
| } |
| print_stats(); |
| if (sum_of_resids) |
| fprintf(stderr, ">> Non-zero sum of residual counts=%d\n", |
| sum_of_resids); |
| if (num_dio_not_done) |
| fprintf(stderr, ">> dio requested but _not done %d times\n", |
| num_dio_not_done); |
| return res; |
| } |
