| #define _XOPEN_SOURCE 500 |
| |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <ctype.h> |
| #include <errno.h> |
| #include <limits.h> |
| #include <signal.h> |
| #include <poll.h> |
| #include <sys/ioctl.h> |
| #include <sys/types.h> |
| #include <sys/stat.h> |
| #include <sys/sysmacros.h> |
| #include <linux/major.h> |
| #include <sys/time.h> |
| typedef unsigned char u_char; /* horrible, for scsi.h */ |
| #include "sg_lib.h" |
| #include "sg_io_linux.h" |
| #include "sg_unaligned.h" |
| |
| /* A utility program for the Linux OS SCSI generic ("sg") device driver. |
| * Copyright (C) 1999-2002 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 specialization of the Unix "dd" command in which |
| one or both of the given files is a scsi generic device or a raw |
| device. A block size ('bs') is assumed to be 512 if not given. This |
| program complains if 'ibs' or 'obs' are given with some other value |
| than 'bs'. If 'if' is not given or 'if=-' then stdin is assumed. If |
| 'of' is not given or 'of=-' then stdout assumed. Multipliers: |
| 'c','C' *1 'b','B' *512 'k' *1024 'K' *1000 |
| 'm' *(1024^2) 'M' *(1000^2) 'g' *(1024^3) 'G' *(1000^3) |
| |
| 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 (16KB |
| in this case) are transferred to or from the sg device in a single SCSI |
| command. |
| |
| This version should compile with Linux sg drivers with version numbers |
| >= 30000 . This version uses queuing within the Linux sg driver. |
| |
| */ |
| |
| static char * version_str = "0.58 20151209"; |
| /* resurrected from "0.55 20020509" */ |
| |
| #define DEF_BLOCK_SIZE 512 |
| #define DEF_BLOCKS_PER_TRANSFER 128 |
| |
| /* #define SG_DEBUG */ |
| |
| #define SENSE_BUFF_LEN 32 /* Arbitrary, could be larger */ |
| #define DEF_TIMEOUT 60000 /* 60,000 millisecs == 60 seconds */ |
| #define S_RW_LEN 10 /* Use SCSI READ(10) and WRITE(10) */ |
| |
| #define SGP_READ10 0x28 |
| #define SGP_WRITE10 0x2a |
| #define DEF_NUM_THREADS 4 /* actually degree of concurrency */ |
| #define MAX_NUM_THREADS 32 |
| |
| #ifndef RAW_MAJOR |
| #define RAW_MAJOR 255 /*unlikey value */ |
| #endif |
| |
| #define FT_OTHER 0 /* filetype other than sg or raw device */ |
| #define FT_SG 1 /* filetype is sg char device */ |
| #define FT_RAW 2 /* filetype is raw char device */ |
| |
| #define QS_IDLE 0 /* ready to start a copy cycle */ |
| #define QS_IN_STARTED 1 /* commenced read */ |
| #define QS_IN_FINISHED 2 /* finished read, ready for write */ |
| #define QS_OUT_STARTED 3 /* commenced write */ |
| |
| #define QS_IN_POLL 11 |
| #define QS_OUT_POLL 12 |
| |
| #define STR_SZ 1024 |
| #define INOUTF_SZ 512 |
| #define EBUFF_SZ 512 |
| |
| |
| struct request_element; |
| |
| typedef struct request_collection |
| { /* one instance visible to all threads */ |
| int infd; |
| int skip; |
| int in_type; |
| int in_scsi_type; |
| int in_blk; /* next block address to read */ |
| int in_count; /* blocks remaining for next read */ |
| int in_done_count; /* count of completed in blocks */ |
| int in_partial; |
| int outfd; |
| int seek; |
| int out_type; |
| int out_scsi_type; |
| int out_blk; /* next block address to write */ |
| int out_count; /* blocks remaining for next write */ |
| int out_done_count; /* count of completed out blocks */ |
| int out_partial; |
| int bs; |
| int bpt; |
| int dio; |
| int dio_incomplete; |
| int sum_of_resids; |
| int coe; |
| int debug; |
| int num_rq_elems; |
| struct request_element * req_arr; |
| } Rq_coll; |
| |
| typedef struct request_element |
| { /* one instance per worker thread */ |
| int qstate; /* "QS" state */ |
| int infd; |
| int outfd; |
| int wr; |
| int blk; |
| int num_blks; |
| unsigned char * buffp; |
| unsigned char * alloc_bp; |
| sg_io_hdr_t io_hdr; |
| unsigned char cmd[S_RW_LEN]; |
| unsigned char sb[SENSE_BUFF_LEN]; |
| int bs; |
| int dio; |
| int dio_incomplete; |
| int resid; |
| int in_scsi_type; |
| int out_scsi_type; |
| int debug; |
| } Rq_elem; |
| |
| static Rq_coll rcoll; |
| static struct pollfd in_pollfd_arr[MAX_NUM_THREADS]; |
| static struct pollfd out_pollfd_arr[MAX_NUM_THREADS]; |
| static int dd_count = -1; |
| |
| static const char * proc_allow_dio = "/proc/scsi/sg/allow_dio"; |
| |
| static int sg_finish_io(int wr, Rq_elem * rep); |
| |
| |
| 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() |
| { |
| int infull, outfull; |
| |
| if (0 != rcoll.out_count) |
| fprintf(stderr, " remaining block count=%d\n", rcoll.out_count); |
| infull = dd_count - rcoll.in_done_count - rcoll.in_partial; |
| fprintf(stderr, "%d+%d records in\n", infull, rcoll.in_partial); |
| outfull = dd_count - rcoll.out_done_count - rcoll.out_partial; |
| fprintf(stderr, "%d+%d records out\n", outfull, rcoll.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) |
| { |
| fprintf(stderr, "Progress report, continuing ...\n"); |
| print_stats (); |
| if (sig) { } /* suppress unused warning */ |
| } |
| |
| static int |
| dd_filetype(const char * filename) |
| { |
| struct stat st; |
| |
| if (stat(filename, &st) < 0) |
| return FT_OTHER; |
| if (S_ISCHR(st.st_mode)) { |
| if (RAW_MAJOR == major(st.st_rdev)) |
| return FT_RAW; |
| else if (SCSI_GENERIC_MAJOR == major(st.st_rdev)) |
| return FT_SG; |
| } |
| return FT_OTHER; |
| } |
| |
| static void |
| usage() |
| { |
| fprintf(stderr, "Usage: " |
| "sgq_dd [if=<infile>] [skip=<n>] [of=<ofile>] [seek=<n>] " |
| "[bs=<num>]\n" |
| " [bpt=<num>] [count=<n>] [dio=0|1] [thr=<n>] " |
| "[coe=0|1] [gen=<n>]\n" |
| " [time=0|1] [deb=<n>] [--version]\n" |
| " usually either 'if' or 'of' is a sg or raw device\n" |
| " 'bpt' is blocks_per_transfer (default is 128)\n" |
| " 'dio' is direct IO, 1->attempt, 0->indirect IO (def)\n" |
| " 'thr' is number of queues, must be > 0, default 4, max 32\n"); |
| fprintf(stderr, " 'coe' continue on sg error, 0->exit (def), " |
| "1->zero + continue\n" |
| " 'time' 0->no timing(def), 1->time plus calculate throughput\n" |
| " 'gen' 0-> 1 file is special(def), 1-> any files allowed\n" |
| " 'deb' is debug, 0->none (def), > 0->varying degrees of debug\n"); |
| } |
| |
| /* Returns -1 for error, 0 for nothing found, QS_IN_POLL or QS_OUT_POLL */ |
| static int |
| do_poll(Rq_coll * clp, int timeout, int * req_indexp) |
| { |
| int k, res; |
| |
| if (FT_SG == clp->out_type) { |
| while (((res = poll(out_pollfd_arr, clp->num_rq_elems, timeout)) < 0) |
| && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| perror("poll error on output fds"); |
| return -1; |
| } |
| else if (res > 0) { |
| for (k = 0; k < clp->num_rq_elems; ++k) { |
| if (out_pollfd_arr[k].revents & POLLIN) { |
| if (req_indexp) |
| *req_indexp = k; |
| return QS_OUT_POLL; |
| } |
| } |
| } |
| } |
| if (FT_SG == clp->in_type) { |
| while (((res = poll(in_pollfd_arr, clp->num_rq_elems, timeout)) < 0) |
| && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| perror("poll error on input fds"); |
| return -1; |
| } |
| else if (res > 0) { |
| for (k = 0; k < clp->num_rq_elems; ++k) { |
| if (in_pollfd_arr[k].revents & POLLIN) { |
| if (req_indexp) |
| *req_indexp = k; |
| return QS_IN_POLL; |
| } |
| } |
| } |
| } |
| return 0; |
| } |
| |
| |
| /* Return of 0 -> success, -1 -> failure, 2 -> try again */ |
| static int |
| read_capacity(int sg_fd, int * num_sect, int * sect_sz) |
| { |
| int res; |
| unsigned char rcCmdBlk [10] = {0x25, 0, 0, 0, 0, 0, 0, 0, 0, 0}; |
| unsigned char rcBuff[64]; |
| unsigned char sense_b[64]; |
| sg_io_hdr_t io_hdr; |
| |
| memset(&io_hdr, 0, sizeof(sg_io_hdr_t)); |
| io_hdr.interface_id = 'S'; |
| io_hdr.cmd_len = sizeof(rcCmdBlk); |
| io_hdr.mx_sb_len = sizeof(sense_b); |
| io_hdr.dxfer_direction = SG_DXFER_FROM_DEV; |
| io_hdr.dxfer_len = sizeof(rcBuff); |
| io_hdr.dxferp = rcBuff; |
| io_hdr.cmdp = rcCmdBlk; |
| io_hdr.sbp = sense_b; |
| io_hdr.timeout = DEF_TIMEOUT; |
| |
| if (ioctl(sg_fd, SG_IO, &io_hdr) < 0) { |
| perror("read_capacity (SG_IO) error"); |
| return -1; |
| } |
| res = sg_err_category3(&io_hdr); |
| if (SG_LIB_CAT_UNIT_ATTENTION == res) |
| return 2; /* probably have another go ... */ |
| else if (SG_LIB_CAT_CLEAN != res) { |
| sg_chk_n_print3("read capacity", &io_hdr, 1); |
| return -1; |
| } |
| *num_sect = 1 + sg_get_unaligned_be32(rcBuff + 0); |
| *sect_sz = sg_get_unaligned_be32(rcBuff + 4); |
| #ifdef SG_DEBUG |
| fprintf(stderr, "number of sectors=%d, sector size=%d\n", |
| *num_sect, *sect_sz); |
| #endif |
| return 0; |
| } |
| |
| /* 0 -> ok, 1 -> short read, -1 -> error */ |
| static int |
| normal_in_operation(Rq_coll * clp, Rq_elem * rep, int blocks) |
| { |
| int res; |
| int stop_after_write = 0; |
| |
| rep->qstate = QS_IN_STARTED; |
| if (rep->debug > 8) |
| fprintf(stderr, "normal_in_operation: start blk=%d num_blks=%d\n", |
| rep->blk, rep->num_blks); |
| while (((res = read(rep->infd, rep->buffp, |
| blocks * rep->bs)) < 0) && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| fprintf(stderr, "sgq_dd: reading, in_blk=%d, errno=%d\n", rep->blk, |
| errno); |
| return -1; |
| } |
| if (res < blocks * rep->bs) { |
| int o_blocks = blocks; |
| stop_after_write = 1; |
| blocks = res / rep->bs; |
| if ((res % rep->bs) > 0) { |
| blocks++; |
| clp->in_partial++; |
| } |
| /* Reverse out + re-apply blocks on clp */ |
| clp->in_blk -= o_blocks; |
| clp->in_count += o_blocks; |
| rep->num_blks = blocks; |
| clp->in_blk += blocks; |
| clp->in_count -= blocks; |
| } |
| clp->in_done_count -= blocks; |
| rep->qstate = QS_IN_FINISHED; |
| return stop_after_write; |
| } |
| |
| /* 0 -> ok, -1 -> error */ |
| static int |
| normal_out_operation(Rq_coll * clp, Rq_elem * rep, int blocks) |
| { |
| int res; |
| |
| rep->qstate = QS_OUT_STARTED; |
| if (rep->debug > 8) |
| fprintf(stderr, "normal_out_operation: start blk=%d num_blks=%d\n", |
| rep->blk, rep->num_blks); |
| while (((res = write(rep->outfd, rep->buffp, |
| rep->num_blks * rep->bs)) < 0) && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| fprintf(stderr, "sgq_dd: output, out_blk=%d, errno=%d\n", rep->blk, |
| errno); |
| return -1; |
| } |
| if (res < blocks * rep->bs) { |
| blocks = res / rep->bs; |
| if ((res % rep->bs) > 0) { |
| blocks++; |
| clp->out_partial++; |
| } |
| rep->num_blks = blocks; |
| } |
| clp->out_done_count -= blocks; |
| rep->qstate = QS_IDLE; |
| return 0; |
| } |
| |
| /* Returns 1 for retryable, 0 for ok, -ve for error */ |
| static int |
| sg_fin_in_operation(Rq_coll * clp, Rq_elem * rep) |
| { |
| int res; |
| |
| rep->qstate = QS_IN_FINISHED; |
| res = sg_finish_io(rep->wr, rep); |
| if (res < 0) { |
| if (clp->coe) { |
| memset(rep->buffp, 0, rep->num_blks * rep->bs); |
| fprintf(stderr, ">> substituted zeros for in blk=%d for " |
| "%d bytes\n", rep->blk, rep->num_blks * rep->bs); |
| res = 0; |
| } |
| else { |
| fprintf(stderr, "error finishing sg in command\n"); |
| return res; |
| } |
| } |
| if (0 == res) { /* looks good, going to return */ |
| if (rep->dio_incomplete || rep->resid) { |
| clp->dio_incomplete += rep->dio_incomplete; |
| clp->sum_of_resids += rep->resid; |
| } |
| clp->in_done_count -= rep->num_blks; |
| } |
| return res; |
| } |
| |
| /* Returns 1 for retryable, 0 for ok, -ve for error */ |
| static int |
| sg_fin_out_operation(Rq_coll * clp, Rq_elem * rep) |
| { |
| int res; |
| |
| rep->qstate = QS_IDLE; |
| res = sg_finish_io(rep->wr, rep); |
| if (res < 0) { |
| if (clp->coe) { |
| fprintf(stderr, ">> ignored error for out blk=%d for " |
| "%d bytes\n", rep->blk, rep->num_blks * rep->bs); |
| res = 0; |
| } |
| else { |
| fprintf(stderr, "error finishing sg out command\n"); |
| return res; |
| } |
| } |
| if (0 == res) { |
| if (rep->dio_incomplete || rep->resid) { |
| clp->dio_incomplete += rep->dio_incomplete; |
| clp->sum_of_resids += rep->resid; |
| } |
| clp->out_done_count -= rep->num_blks; |
| } |
| return res; |
| } |
| |
| static int |
| sg_start_io(Rq_elem * rep) |
| { |
| sg_io_hdr_t * hp = &rep->io_hdr; |
| int res; |
| |
| rep->qstate = rep->wr ? QS_OUT_STARTED : QS_IN_STARTED; |
| memset(rep->cmd, 0, sizeof(rep->cmd)); |
| rep->cmd[0] = rep->wr ? SGP_WRITE10 : SGP_READ10; |
| sg_put_unaligned_be32((uint32_t)rep->blk, rep->cmd + 2); |
| sg_put_unaligned_be16((uint16_t)rep->num_blks, rep->cmd + 7); |
| memset(hp, 0, sizeof(sg_io_hdr_t)); |
| hp->interface_id = 'S'; |
| hp->cmd_len = sizeof(rep->cmd); |
| hp->cmdp = rep->cmd; |
| hp->dxfer_direction = rep->wr ? SG_DXFER_TO_DEV : SG_DXFER_FROM_DEV; |
| hp->dxfer_len = rep->bs * rep->num_blks; |
| hp->dxferp = rep->buffp; |
| hp->mx_sb_len = sizeof(rep->sb); |
| hp->sbp = rep->sb; |
| hp->timeout = DEF_TIMEOUT; |
| hp->usr_ptr = rep; |
| hp->pack_id = rep->blk; |
| if (rep->dio) |
| hp->flags |= SG_FLAG_DIRECT_IO; |
| if (rep->debug > 8) { |
| fprintf(stderr, "sg_start_io: SCSI %s, blk=%d num_blks=%d\n", |
| rep->wr ? "WRITE" : "READ", rep->blk, rep->num_blks); |
| sg_print_command(hp->cmdp); |
| fprintf(stderr, " len=%d, dxfrp=%p, cmd_len=%d\n", |
| hp->dxfer_len, hp->dxferp, hp->cmd_len); |
| } |
| |
| while (((res = write(rep->wr ? rep->outfd : rep->infd, hp, |
| sizeof(sg_io_hdr_t))) < 0) && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| if (ENOMEM == errno) |
| return 1; |
| return res; |
| } |
| return 0; |
| } |
| |
| /* -1 -> unrecoverable error, 0 -> successful, 1 -> try again */ |
| static int |
| sg_finish_io(int wr, Rq_elem * rep) |
| { |
| int res; |
| sg_io_hdr_t io_hdr; |
| sg_io_hdr_t * hp; |
| #if 0 |
| static int testing = 0; /* thread dubious! */ |
| #endif |
| |
| memset(&io_hdr, 0 , sizeof(sg_io_hdr_t)); |
| /* FORCE_PACK_ID active set only read packet with matching pack_id */ |
| io_hdr.interface_id = 'S'; |
| io_hdr.dxfer_direction = rep->wr ? SG_DXFER_TO_DEV : SG_DXFER_FROM_DEV; |
| io_hdr.pack_id = rep->blk; |
| |
| while (((res = read(wr ? rep->outfd : rep->infd, &io_hdr, |
| sizeof(sg_io_hdr_t))) < 0) && (EINTR == errno)) |
| ; |
| if (res < 0) { |
| perror("finishing io on sg device, error"); |
| return -1; |
| } |
| if (rep != (Rq_elem *)io_hdr.usr_ptr) { |
| fprintf(stderr, |
| "sg_finish_io: bad usr_ptr, request-response mismatch\n"); |
| exit(1); |
| } |
| memcpy(&rep->io_hdr, &io_hdr, sizeof(sg_io_hdr_t)); |
| hp = &rep->io_hdr; |
| |
| switch (sg_err_category3(hp)) { |
| case SG_LIB_CAT_CLEAN: |
| break; |
| case SG_LIB_CAT_RECOVERED: |
| fprintf(stderr, "Recovered error on block=%d, num=%d\n", |
| rep->blk, rep->num_blks); |
| break; |
| case SG_LIB_CAT_UNIT_ATTENTION: |
| return 1; |
| default: |
| { |
| char ebuff[EBUFF_SZ]; |
| snprintf(ebuff, EBUFF_SZ, "%s blk=%d", |
| rep->wr ? "writing": "reading", rep->blk); |
| sg_chk_n_print3(ebuff, hp, 1); |
| return -1; |
| } |
| } |
| #if 0 |
| if (0 == (++testing % 100)) return -1; |
| #endif |
| if (rep->dio && |
| ((hp->info & SG_INFO_DIRECT_IO_MASK) != SG_INFO_DIRECT_IO)) |
| rep->dio_incomplete = 1; /* count dios done as indirect IO */ |
| else |
| rep->dio_incomplete = 0; |
| rep->resid = hp->resid; |
| if (rep->debug > 8) |
| fprintf(stderr, "sg_finish_io: completed %s, blk=%d\n", |
| wr ? "WRITE" : "READ", rep->blk); |
| return 0; |
| } |
| |
| /* Returns scsi_type or -1 for error */ |
| static int |
| sg_prepare(int fd, int sz) |
| { |
| int res, t; |
| struct sg_scsi_id info; |
| |
| res = ioctl(fd, SG_GET_VERSION_NUM, &t); |
| if ((res < 0) || (t < 30000)) { |
| fprintf(stderr, "sgq_dd: sg driver prior to 3.x.y\n"); |
| return -1; |
| } |
| res = ioctl(fd, SG_SET_RESERVED_SIZE, &sz); |
| if (res < 0) |
| perror("sgq_dd: SG_SET_RESERVED_SIZE error"); |
| #if 0 |
| t = 1; |
| res = ioctl(fd, SG_SET_FORCE_PACK_ID, &t); |
| if (res < 0) |
| perror("sgq_dd: SG_SET_FORCE_PACK_ID error"); |
| #endif |
| res = ioctl(fd, SG_GET_SCSI_ID, &info); |
| if (res < 0) { |
| perror("sgq_dd: SG_SET_SCSI_ID error"); |
| return -1; |
| } |
| else |
| return info.scsi_type; |
| } |
| |
| /* Return 0 for ok, anything else for errors */ |
| static int |
| prepare_rq_elems(Rq_coll * clp, const char * inf, const char * outf) |
| { |
| int k; |
| Rq_elem * rep; |
| size_t psz; |
| char ebuff[EBUFF_SZ]; |
| int sz = clp->bpt * clp->bs; |
| int scsi_type; |
| |
| clp->req_arr = malloc(sizeof(Rq_elem) * clp->num_rq_elems); |
| if (NULL == clp->req_arr) |
| return 1; |
| for (k = 0; k < clp->num_rq_elems; ++k) { |
| rep = &clp->req_arr[k]; |
| memset(rep, 0, sizeof(Rq_elem)); |
| psz = getpagesize(); |
| if (NULL == (rep->alloc_bp = malloc(sz + psz))) |
| return 1; |
| rep->buffp = (unsigned char *) |
| (((unsigned long)rep->alloc_bp + psz - 1) & (~(psz - 1))); |
| rep->qstate = QS_IDLE; |
| rep->bs = clp->bs; |
| rep->dio = clp->dio; |
| rep->debug = clp->debug; |
| rep->out_scsi_type = clp->out_scsi_type; |
| if (FT_SG == clp->in_type) { |
| if (0 == k) |
| rep->infd = clp->infd; |
| else { |
| if ((rep->infd = open(inf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for sg reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| in_pollfd_arr[k].fd = rep->infd; |
| in_pollfd_arr[k].events = POLLIN; |
| if ((scsi_type = sg_prepare(rep->infd, sz)) < 0) |
| return 1; |
| if (0 == k) |
| clp->in_scsi_type = scsi_type; |
| rep->in_scsi_type = clp->in_scsi_type; |
| } |
| else |
| rep->infd = clp->infd; |
| |
| if (FT_SG == clp->out_type) { |
| if (0 == k) |
| rep->outfd = clp->outfd; |
| else { |
| if ((rep->outfd = open(outf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for sg writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| out_pollfd_arr[k].fd = rep->outfd; |
| out_pollfd_arr[k].events = POLLIN; |
| if ((scsi_type = sg_prepare(rep->outfd, sz)) < 0) |
| return 1; |
| if (0 == k) |
| clp->out_scsi_type = scsi_type; |
| rep->out_scsi_type = clp->out_scsi_type; |
| } |
| else |
| rep->outfd = clp->outfd; |
| } |
| return 0; |
| } |
| |
| /* Returns a "QS" code and req index, or QS_IDLE and position of first idle |
| (-1 if no idle position). Returns -1 on poll error. */ |
| static int |
| decider(Rq_coll * clp, int first_xfer, int * req_indexp) |
| { |
| int k, res; |
| Rq_elem * rep; |
| int first_idle_index = -1; |
| int lowest_blk_index = -1; |
| int times; |
| int try_poll = 0; |
| int lowest_blk = INT_MAX; |
| |
| times = first_xfer ? 1 : clp->num_rq_elems; |
| for (k = 0; k < times; ++k) { |
| rep = &clp->req_arr[k]; |
| if ((QS_IN_STARTED == rep->qstate) || |
| (QS_OUT_STARTED == rep->qstate)) |
| try_poll = 1; |
| else if ((QS_IN_FINISHED == rep->qstate) && (rep->blk < lowest_blk)) { |
| lowest_blk = rep->blk; |
| lowest_blk_index = k; |
| } |
| else if ((QS_IDLE == rep->qstate) && (first_idle_index < 0)) |
| first_idle_index = k; |
| } |
| if (try_poll) { |
| res = do_poll(clp, 0, req_indexp); |
| if (0 != res) |
| return res; |
| } |
| |
| if (lowest_blk_index >= 0) { |
| if (req_indexp) |
| *req_indexp = lowest_blk_index; |
| return QS_IN_FINISHED; |
| } |
| #if 0 |
| if (try_poll) { |
| res = do_poll(clp, 2, req_indexp); |
| if (0 != res) |
| return res; |
| } |
| #endif |
| if (req_indexp) |
| *req_indexp = first_idle_index; |
| return QS_IDLE; |
| } |
| |
| |
| int |
| main(int argc, char * argv[]) |
| { |
| int skip = 0; |
| int seek = 0; |
| int ibs = 0; |
| int obs = 0; |
| char str[STR_SZ]; |
| char * key; |
| char * buf; |
| char inf[INOUTF_SZ]; |
| char outf[INOUTF_SZ]; |
| int res, k; |
| int in_num_sect = 0; |
| int out_num_sect = 0; |
| int num_threads = DEF_NUM_THREADS; |
| int gen = 0; |
| int do_time = 0; |
| int in_sect_sz, out_sect_sz, first_xfer, qstate, req_index, seek_skip; |
| int blocks, stop_after_write, terminate; |
| char ebuff[EBUFF_SZ]; |
| Rq_elem * rep; |
| struct timeval start_tm, end_tm; |
| |
| memset(&rcoll, 0, sizeof(Rq_coll)); |
| rcoll.bpt = DEF_BLOCKS_PER_TRANSFER; |
| rcoll.in_type = FT_OTHER; |
| rcoll.out_type = FT_OTHER; |
| 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) |
| strncpy(inf, buf, INOUTF_SZ); |
| else if (strcmp(key,"of") == 0) |
| strncpy(outf, buf, INOUTF_SZ); |
| else if (0 == strcmp(key,"ibs")) |
| ibs = sg_get_num(buf); |
| else if (0 == strcmp(key,"obs")) |
| obs = sg_get_num(buf); |
| else if (0 == strcmp(key,"bs")) |
| rcoll.bs = sg_get_num(buf); |
| else if (0 == strcmp(key,"bpt")) |
| rcoll.bpt = sg_get_num(buf); |
| else if (0 == strcmp(key,"skip")) |
| skip = sg_get_num(buf); |
| else if (0 == strcmp(key,"seek")) |
| seek = sg_get_num(buf); |
| else if (0 == strcmp(key,"count")) |
| dd_count = sg_get_num(buf); |
| else if (0 == strcmp(key,"dio")) |
| rcoll.dio = sg_get_num(buf); |
| else if (0 == strcmp(key,"thr")) |
| num_threads = sg_get_num(buf); |
| else if (0 == strcmp(key,"coe")) |
| rcoll.coe = sg_get_num(buf); |
| else if (0 == strcmp(key,"gen")) |
| gen = sg_get_num(buf); |
| else if (0 == strncmp(key,"deb", 3)) |
| rcoll.debug = sg_get_num(buf); |
| else if (0 == strcmp(key,"time")) |
| do_time = sg_get_num(buf); |
| else if (0 == strncmp(key, "--vers", 6)) { |
| fprintf(stderr, "sgq_dd for sg version 3 driver: %s\n", |
| version_str); |
| return 0; |
| } |
| else { |
| fprintf(stderr, "Unrecognized argument '%s'\n", key); |
| usage(); |
| return 1; |
| } |
| } |
| if (rcoll.bs <= 0) { |
| rcoll.bs = DEF_BLOCK_SIZE; |
| fprintf(stderr, "Assume default 'bs' (block size) of %d bytes\n", |
| rcoll.bs); |
| } |
| if ((ibs && (ibs != rcoll.bs)) || (obs && (obs != rcoll.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 ((num_threads < 1) || (num_threads > MAX_NUM_THREADS)) { |
| fprintf(stderr, "too few or too many threads requested\n"); |
| usage(); |
| return 1; |
| } |
| if (rcoll.debug) |
| fprintf(stderr, "sgq_dd: if=%s skip=%d of=%s seek=%d count=%d\n", |
| inf, skip, outf, seek, dd_count); |
| install_handler (SIGINT, interrupt_handler); |
| install_handler (SIGQUIT, interrupt_handler); |
| install_handler (SIGPIPE, interrupt_handler); |
| install_handler (SIGUSR1, siginfo_handler); |
| |
| rcoll.infd = STDIN_FILENO; |
| rcoll.outfd = STDOUT_FILENO; |
| if (inf[0] && ('-' != inf[0])) { |
| rcoll.in_type = dd_filetype(inf); |
| |
| if (FT_SG == rcoll.in_type) { |
| if ((rcoll.infd = open(inf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for sg reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| if (FT_SG != rcoll.in_type) { |
| if ((rcoll.infd = open(inf, O_RDONLY)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for reading", inf); |
| perror(ebuff); |
| return 1; |
| } |
| else if (skip > 0) { |
| loff_t offset = skip; |
| |
| offset *= rcoll.bs; /* could exceed 32 here! */ |
| if (lseek(rcoll.infd, offset, SEEK_SET) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: couldn't skip to required position on %s", inf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| } |
| if (outf[0] && ('-' != outf[0])) { |
| rcoll.out_type = dd_filetype(outf); |
| |
| if (FT_SG == rcoll.out_type) { |
| if ((rcoll.outfd = open(outf, O_RDWR)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for sg writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| else { |
| if (FT_OTHER == rcoll.out_type) { |
| if ((rcoll.outfd = open(outf, O_WRONLY | O_CREAT, 0666)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| else { |
| if ((rcoll.outfd = open(outf, O_WRONLY)) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: could not open %s for raw writing", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| if (seek > 0) { |
| loff_t offset = seek; |
| |
| offset *= rcoll.bs; /* could exceed 32 bits here! */ |
| if (lseek(rcoll.outfd, offset, SEEK_SET) < 0) { |
| snprintf(ebuff, EBUFF_SZ, |
| "sgq_dd: couldn't seek to required position on %s", outf); |
| perror(ebuff); |
| return 1; |
| } |
| } |
| } |
| } |
| if ((STDIN_FILENO == rcoll.infd) && (STDOUT_FILENO == rcoll.outfd)) { |
| fprintf(stderr, "Disallow both if and of to be stdin and stdout"); |
| return 1; |
| } |
| if ((FT_OTHER == rcoll.in_type) && (FT_OTHER == rcoll.out_type) && !gen) { |
| fprintf(stderr, "Either 'if' or 'of' must be a sg or raw device\n"); |
| return 1; |
| } |
| if (0 == dd_count) |
| return 0; |
| else if (dd_count < 0) { |
| if (FT_SG == rcoll.in_type) { |
| res = read_capacity(rcoll.infd, &in_num_sect, &in_sect_sz); |
| if (2 == res) { |
| fprintf(stderr, "Unit attention, media changed(in), repeat\n"); |
| res = read_capacity(rcoll.infd, &in_num_sect, &in_sect_sz); |
| } |
| if (0 != res) { |
| fprintf(stderr, "Unable to read capacity on %s\n", inf); |
| in_num_sect = -1; |
| } |
| else { |
| if (in_num_sect > skip) |
| in_num_sect -= skip; |
| } |
| } |
| if (FT_SG == rcoll.out_type) { |
| res = read_capacity(rcoll.outfd, &out_num_sect, &out_sect_sz); |
| if (2 == res) { |
| fprintf(stderr, "Unit attention, media changed(out), " |
| "repeat\n"); |
| res = read_capacity(rcoll.outfd, &out_num_sect, &out_sect_sz); |
| } |
| if (0 != res) { |
| fprintf(stderr, "Unable to read capacity on %s\n", outf); |
| out_num_sect = -1; |
| } |
| else { |
| if (out_num_sect > seek) |
| out_num_sect -= seek; |
| } |
| } |
| 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 (rcoll.debug > 1) |
| fprintf(stderr, "Start of loop, count=%d, in_num_sect=%d, " |
| "out_num_sect=%d\n", dd_count, in_num_sect, out_num_sect); |
| if (dd_count <= 0) { |
| fprintf(stderr, "Couldn't calculate count, please give one\n"); |
| return 1; |
| } |
| |
| rcoll.in_count = dd_count; |
| rcoll.in_done_count = dd_count; |
| rcoll.skip = skip; |
| rcoll.in_blk = skip; |
| rcoll.out_count = dd_count; |
| rcoll.out_done_count = dd_count; |
| rcoll.seek = seek; |
| rcoll.out_blk = seek; |
| |
| if ((FT_SG == rcoll.in_type) || (FT_SG == rcoll.out_type)) |
| rcoll.num_rq_elems = num_threads; |
| else |
| rcoll.num_rq_elems = 1; |
| if (prepare_rq_elems(&rcoll, inf, outf)) { |
| fprintf(stderr, "Setup failure, perhaps no memory\n"); |
| return 1; |
| } |
| |
| first_xfer = 1; |
| stop_after_write = 0; |
| terminate = 0; |
| seek_skip = rcoll.seek - rcoll.skip; |
| if (do_time) { |
| start_tm.tv_sec = 0; |
| start_tm.tv_usec = 0; |
| gettimeofday(&start_tm, NULL); |
| } |
| while (rcoll.out_done_count > 0) { /* >>>>>>>>> main loop */ |
| req_index = -1; |
| qstate = decider(&rcoll, first_xfer, &req_index); |
| rep = (req_index < 0) ? NULL : (rcoll.req_arr + req_index); |
| switch (qstate) { |
| case QS_IDLE: |
| if ((NULL == rep) || (rcoll.in_count <= 0)) { |
| /* usleep(1000); */ |
| /* do_poll(&rcoll, 10, NULL); */ |
| /* do_poll(&rcoll, 0, NULL); */ |
| break; |
| } |
| if (rcoll.debug > 8) |
| fprintf(stderr, " sgq_dd: non-sleeping QS_IDLE state, " |
| "req_index=%d\n", req_index); |
| if (first_xfer >= 2) |
| first_xfer = 0; |
| else if (1 == first_xfer) |
| ++first_xfer; |
| if (stop_after_write) { |
| terminate = 1; |
| break; |
| } |
| blocks = (rcoll.in_count > rcoll.bpt) ? rcoll.bpt : rcoll.in_count; |
| rep->wr = 0; |
| rep->blk = rcoll.in_blk; |
| rep->num_blks = blocks; |
| rcoll.in_blk += blocks; |
| rcoll.in_count -= blocks; |
| |
| if (FT_SG == rcoll.in_type) { |
| res = sg_start_io(rep); |
| if (0 != res) { |
| if (1 == res) |
| fprintf(stderr, "Out of memory starting sg io\n"); |
| terminate = 1; |
| } |
| } |
| else { |
| res = normal_in_operation(&rcoll, rep, blocks); |
| if (res < 0) |
| terminate = 1; |
| else if (res > 0) |
| stop_after_write = 1; |
| } |
| break; |
| case QS_IN_FINISHED: |
| if (rcoll.debug > 8) |
| fprintf(stderr, " sgq_dd: state is QS_IN_FINISHED, " |
| "req_index=%d\n", req_index); |
| if ((rep->blk + seek_skip) != rcoll.out_blk) { |
| /* if write would be out of sequence then wait */ |
| if (rcoll.debug > 4) |
| fprintf(stderr, " sgq_dd: QS_IN_FINISHED, " |
| "out of sequence\n"); |
| usleep(200); |
| break; |
| } |
| rep->wr = 1; |
| rep->blk = rcoll.out_blk; |
| blocks = rep->num_blks; |
| rcoll.out_blk += blocks; |
| rcoll.out_count -= blocks; |
| |
| if (FT_SG == rcoll.out_type) { |
| res = sg_start_io(rep); |
| if (0 != res) { |
| if (1 == res) |
| fprintf(stderr, "Out of memory starting sg io\n"); |
| terminate = 1; |
| } |
| } |
| else { |
| if (normal_out_operation(&rcoll, rep, blocks) < 0) |
| terminate = 1; |
| } |
| break; |
| case QS_IN_POLL: |
| if (rcoll.debug > 8) |
| fprintf(stderr, " sgq_dd: state is QS_IN_POLL, " |
| "req_index=%d\n", req_index); |
| res = sg_fin_in_operation(&rcoll, rep); |
| if (res < 0) |
| terminate = 1; |
| else if (res > 1) { |
| if (first_xfer) { |
| /* only retry on first xfer */ |
| if (0 != sg_start_io(rep)) |
| terminate = 1; |
| } |
| else |
| terminate = 1; |
| } |
| break; |
| case QS_OUT_POLL: |
| if (rcoll.debug > 8) |
| fprintf(stderr, " sgq_dd: state is QS_OUT_POLL, " |
| "req_index=%d\n", req_index); |
| res = sg_fin_out_operation(&rcoll, rep); |
| if (res < 0) |
| terminate = 1; |
| else if (res > 1) { |
| if (first_xfer) { |
| /* only retry on first xfer */ |
| if (0 != sg_start_io(rep)) |
| terminate = 1; |
| } |
| else |
| terminate = 1; |
| } |
| break; |
| default: |
| if (rcoll.debug > 8) |
| fprintf(stderr, " sgq_dd: state is ?????\n"); |
| terminate = 1; |
| break; |
| } |
| if (terminate) |
| break; |
| } /* >>>>>>>>>>>>> end of main loop */ |
| |
| 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)rcoll.bs * (dd_count - rcoll.out_done_count); |
| printf("time to transfer data was %d.%06d secs", |
| (int)res_tm.tv_sec, (int)res_tm.tv_usec); |
| if ((a > 0.00001) && (b > 511)) |
| printf(", %.2f MB/sec\n", b / (a * 1000000.0)); |
| else |
| printf("\n"); |
| } |
| |
| if (STDIN_FILENO != rcoll.infd) |
| close(rcoll.infd); |
| if (STDOUT_FILENO != rcoll.outfd) |
| close(rcoll.outfd); |
| res = 0; |
| if (0 != rcoll.out_count) { |
| fprintf(stderr, ">>>> Some error occurred,\n"); |
| res = 2; |
| } |
| print_stats(); |
| if (rcoll.dio_incomplete) { |
| int fd; |
| char c; |
| |
| fprintf(stderr, ">> Direct IO requested but incomplete %d times\n", |
| rcoll.dio_incomplete); |
| 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 (rcoll.sum_of_resids) |
| fprintf(stderr, ">> Non-zero sum of residual counts=%d\n", |
| rcoll.sum_of_resids); |
| return res; |
| } |
