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Diffstat (limited to 'testing/sg_mrq_dd.cpp')
| -rw-r--r-- | testing/sg_mrq_dd.cpp | 4664 |
1 files changed, 4664 insertions, 0 deletions
diff --git a/testing/sg_mrq_dd.cpp b/testing/sg_mrq_dd.cpp new file mode 100644 index 00000000..01b38e79 --- /dev/null +++ b/testing/sg_mrq_dd.cpp @@ -0,0 +1,4664 @@ +/* + * A utility program for copying files. Specialised for "files" that + * represent devices that understand the SCSI command set. + * + * Copyright (C) 2018-2022 D. Gilbert + * 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 + * one or both of the given files is a scsi generic device. + * A logical 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. + * + * 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) are transferred to or from the sg device in a single SCSI + * command. + * + * This version is designed for the linux kernel 4 and 5 series. + * + * sg_mrq_dd uses C++ threads and MRQ (multiple requests (in one invocation)) + * facilities in the sg version 4 driver to do "dd" type copies and verifies. + * + */ + +static const char * version_str = "1.44 20221020"; + +#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 <ctype.h> +#include <errno.h> +#include <time.h> /* for nanosleep() */ +#include <poll.h> +#include <limits.h> +// #include <pthread.h> +#include <signal.h> +#define __STDC_FORMAT_MACROS 1 +#include <inttypes.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/sysmacros.h> +#ifndef major +#include <sys/types.h> +#endif +#include <sys/time.h> +#include <linux/major.h> /* for MEM_MAJOR, SCSI_GENERIC_MAJOR, etc */ +#include <linux/fs.h> /* for BLKSSZGET and friends */ +#include <sys/mman.h> /* for mmap() system call */ + +#include <vector> +#include <array> +#include <atomic> // C++ header replacing <stdatomic.h> +#include <random> +#include <thread> // needed for std::this_thread::yield() +#include <mutex> +#include <condition_variable> // for infant_cv: copy/verify first segment + // single threaded +#include <chrono> + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#ifdef HAVE_GETRANDOM +#include <sys/random.h> /* for getrandom() system call */ +#endif + +#ifndef HAVE_LINUX_SG_V4_HDR +/* Kernel uapi header contain __user decorations on user space pointers + * to indicate they are unsafe in the kernel space. However glibc takes + * all those __user decorations out from headers in /usr/include/linux . + * So to stop compile errors when directly importing include/uapi/scsi/sg.h + * undef __user before doing that include. */ +#define __user + +/* Want to block the original sg.h header from also being included. That + * causes lots of multiple definition errors. This will only work if this + * header is included _before_ the original sg.h header. */ +#define _SCSI_GENERIC_H /* original kernel header guard */ +#define _SCSI_SG_H /* glibc header guard */ + +#include "uapi_sg.h" /* local copy of include/uapi/scsi/sg.h */ + +#else +#define __user +#endif /* end of: ifndef HAVE_LINUX_SG_V4_HDR */ + +// C++ local header +#include "sg_scat_gath.h" + +// C headers associated with sg3_utils library +#include "sg_lib.h" +#include "sg_cmds_basic.h" +#include "sg_io_linux.h" +#include "sg_unaligned.h" +#include "sg_pr2serr.h" + + +using namespace std; + +// #ifdef __GNUC__ +// #ifndef __clang__ +// #pragma GCC diagnostic ignored "-Wclobbered" +// #endif +// #endif + + +#ifndef SGV4_FLAG_POLLED +#define SGV4_FLAG_POLLED 0x800 +#endif + +#define MAX_SGL_NUM_VAL (INT32_MAX - 1) /* should reduce for testing */ +// #define MAX_SGL_NUM_VAL 7 /* should reduce for testing */ +#if MAX_SGL_NUM_VAL > INT32_MAX +#error "MAX_SGL_NUM_VAL cannot exceed 2^31 - 1" +#endif + +#define DEF_BLOCK_SIZE 512 +#define DEF_BLOCKS_PER_TRANSFER 128 +#define DEF_BLOCKS_PER_2048TRANSFER 32 +#define DEF_SDT_ICT_MS 300 +#define DEF_SDT_CRT_SEC 3 +#define DEF_SCSI_CDB_SZ 10 +#define MAX_SCSI_CDB_SZ 16 /* could be 32 */ +#define PACK_ID_TID_MULTIPLIER (0x1000000) /* 16,777,216 */ +#define MAX_SLICES 16 /* number of IFILE,OFILE pairs */ +#define MAX_BPT_VALUE (1 << 24) /* used for maximum bs as well */ +#define MAX_COUNT_SKIP_SEEK (1LL << 48) /* coverity wants upper bound */ + +#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 */ + +#define SGP_READ10 0x28 +#define SGP_PRE_FETCH10 0x34 +#define SGP_PRE_FETCH16 0x90 +#define SGP_VERIFY10 0x2f +#define SGP_WRITE10 0x2a +#define DEF_NUM_THREADS 4 +#define MAX_NUM_THREADS 1024 /* was SG_MAX_QUEUE with v3 driver */ +#define DEF_MRQ_NUM 16 + +#define FT_UNKNOWN 0 /* yet to be checked */ +#define FT_OTHER 1 /* filetype other than one of the following */ +#define FT_SG 2 /* filetype is sg char device */ +#define FT_DEV_NULL 4 /* either /dev/null, /dev/zero, or "." */ +#define FT_ST 8 /* filetype is st char device (tape) */ +#define FT_BLOCK 16 /* filetype is a block device */ +#define FT_FIFO 32 /* fifo (named or unnamed pipe (stdout)) */ +#define FT_CHAR 64 /* fifo (named or unnamed pipe (stdout)) */ +#define FT_RANDOM_0_FF 128 /* iflag=00, iflag=ff and iflag=random + override if=IFILE */ +#define FT_ERROR 256 /* couldn't "stat" file */ + +#define DEV_NULL_MINOR_NUM 3 +#define DEV_ZERO_MINOR_NUM 5 + +#define EBUFF_SZ 768 + +#define PROC_SCSI_SG_VERSION "/proc/scsi/sg/version" +#define SYS_SCSI_SG_VERSION "/sys/module/sg/version" + + +struct flags_t { + bool append; + bool coe; + bool dio; + bool direct; + bool dpo; + bool dsync; + bool excl; + bool ff; + bool fua; + bool masync; /* more async sg v4 driver fd flag */ + bool mout_if; /* META_OUT_IF flag at mrq level */ + bool nocreat; + bool no_dur; + bool no_thresh; + bool no_waitq; /* dummy, no longer supported, just warn */ + bool order_wr; + bool polled; /* was previously 'hipri' */ + bool qhead; + bool qtail; + bool random; + bool serial; + bool same_fds; + bool wq_excl; + bool zero; + int cdl; /* command duration limits, 0 --> no cdl */ + int mmap; +}; + +typedef pair<int64_t, int> get_next_res_t; /* LBA, num */ +typedef array<uint8_t, MAX_SCSI_CDB_SZ> cdb_arr_t; + +struct cp_ver_pair_t { + cp_ver_pair_t() {} + + get_next_res_t get_next(int desired_num_blks); + + enum class my_state {empty, + init, + underway, + ignore, + finished} state = {my_state::empty}; + + int my_index = 0; + int in_fd = -1; + int in_type = FT_UNKNOWN; + int out_fd = -1; + int out_type = FT_UNKNOWN; + + int64_t dd_count = 0; + atomic<int64_t> next_count_pos {}; + atomic<int64_t> in_rem_count {}; + atomic<int64_t> out_rem_count {}; + atomic<int> in_partial {}; + atomic<int> out_partial {}; + atomic<int> sum_of_resids {}; +}; + +typedef array<cp_ver_pair_t, MAX_SLICES> cp_ver_arr_t; + +/* There is one instance of this structure and it is at file scope so it is + * initialized to zero. The design of this copy multi-threaded copy algorithm + * attempts to have no locks on the fast path. Contention in gcoll.get_next() + * is resolved by the loser repeating its operation. Statistics and error + * information is held in each thread until it shuts down and contention + * can occur at that point. */ +struct global_collection /* one instance visible to all threads */ +{ + cp_ver_arr_t cp_ver_arr; + + /* get_next() is the pivotal function for multi-threaded safety. It can + * be safely called from all threads with the desired number of blocks + * (typically mrq*bpt) and this function returns a pair. The first pair + * value is the starting count value/index [0..dd_count) and the second + * pair value is the number of blocks to copy. If desired_num_blks is + * negative this flags an error has occurred. If the second value in the + * returned pair is 0 then the calling thread should shutdown; a + * negative value indicates an error has occurred (e.g. in another + * thread) and the calling thread should shutdown. */ + + int in0fd; + int64_t dd_count; + int in_type; /* expect all IFILEs to have same type */ + int cdbsz_in; + int help; + struct flags_t in_flags; + atomic<int> in_partial; /* | */ + off_t in_st_size; /* Only for FT_OTHER (regular) file */ + int mrq_num; /* if user gives 0, set this to 1 */ + int out0fd; + int out_type; + int cdbsz_out; + struct flags_t out_flags; + atomic<int> out_partial; /* | */ + off_t out_st_size; /* Only for FT_OTHER (regular) file */ + condition_variable infant_cv; /* after thread:0 does first segment */ + mutex infant_mut; + int bs; + int bpt; + int cmd_timeout; /* in milliseconds */ + int elem_sz; + int outregfd; + int outreg_type; + off_t outreg_st_size; + atomic<int> dio_incomplete_count; + atomic<int> sum_of_resids; + atomic<int> reason_res; + atomic<int> most_recent_pack_id; + uint32_t sdt_ict; /* stall detection; initial check time (milliseconds) */ + uint32_t sdt_crt; /* check repetition time (seconds), after first stall */ + int dry_run; + int verbose; + bool mrq_eq_0; /* true when user gives mrq=0 */ + bool processed; + bool cdbsz_given; + bool cdl_given; + bool count_given; + bool ese; + bool flexible; + bool mrq_polled; + bool ofile_given; + bool unit_nanosec; /* default duration unit is millisecond */ + bool verify; /* don't copy, verify like Unix: cmp */ + bool prefetch; /* for verify: do PF(b),RD(a),V(b)_a_data */ + vector<string> inf_v; + vector<string> outf_v; + const char * infp; + const char * outfp; + class scat_gath_list i_sgl; + class scat_gath_list o_sgl; +}; + +typedef struct request_element +{ /* one instance per worker thread */ + struct global_collection *clp; + bool has_share; + bool both_sg; + bool same_sg; + bool only_in_sg; + bool only_out_sg; + bool stop_after_write; + bool stop_now; + int id; + int bs; + int infd; + int outfd; + int outregfd; + uint8_t * buffp; + uint8_t * alloc_bp; + struct sg_io_v4 io_hdr4[2]; + uint8_t cmd[MAX_SCSI_CDB_SZ]; + uint8_t sb[SENSE_BUFF_LEN]; + int dio_incomplete_count; + int mmap_active; + int rd_p_id; + int rep_count; + int rq_id; + int mmap_len; + int mrq_id; + int mrq_index; + int mrq_pack_id_off; + uint32_t a_mrq_din_blks; + uint32_t a_mrq_dout_blks; + int64_t in_follow_on; + int64_t out_follow_on; + int64_t in_local_count; + int64_t out_local_count; + int64_t in_rem_count; + int64_t out_rem_count; + int in_local_partial; + int out_local_partial; + int in_resid_bytes; + long seed; +#ifdef HAVE_SRAND48_R /* gcc extension. N.B. non-reentrant version slower */ + struct drand48_data drand;/* opaque, used by srand48_r and mrand48_r */ +#endif +} Rq_elem; + +/* Additional parameters for sg_start_io() and sg_finish_io() */ +struct sg_io_extra { + bool prefetch; + bool dout_is_split; + int hpv4_ind; + int blk_offset; + int blks; +}; + +#define MONO_MRQ_ID_INIT 0x10000 + + + +/* Use this class to wrap C++11 <random> features to produce uniform random + * unsigned ints in the range [lo, hi] (inclusive) given a_seed */ +class Rand_uint { +public: + Rand_uint(unsigned int lo, unsigned int hi, unsigned int a_seed) + : uid(lo, hi), dre(a_seed) { } + /* uid ctor takes inclusive range when integral type */ + + unsigned int get() { return uid(dre); } + +private: + uniform_int_distribution<unsigned int> uid; + default_random_engine dre; +}; + +static atomic<int> num_ebusy(0); +static atomic<int> num_start_eagain(0); +static atomic<int> num_fin_eagain(0); +static atomic<int> num_miscompare(0); +static atomic<int> num_fallthru_sigusr2(0); +static atomic<bool> vb_first_time(true); + +static sigset_t signal_set; +static sigset_t orig_signal_set; + +static const char * sg_allow_dio = "/sys/module/sg/parameters/allow_dio"; + +static int do_both_sg_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks, + vector<cdb_arr_t> & a_cdb, + vector<struct sg_io_v4> & a_v4); +static int do_both_sg_segment_mrq0(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks); +static int do_normal_sg_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks, + vector<cdb_arr_t> & a_cdb, + vector<struct sg_io_v4> & a_v4); +static int do_normal_normal_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks); + +#define STRERR_BUFF_LEN 128 + +static mutex strerr_mut; + +static bool have_sg_version = false; +static int sg_version = 0; +static bool sg_version_ge_40045 = false; +static atomic<bool> shutting_down{false}; +static bool do_sync = false; +static int do_time = 1; +static struct global_collection gcoll; +static struct timeval start_tm; +static int num_threads = DEF_NUM_THREADS; +static bool after1 = false; +static int listen_t_tid; + +static const char * my_name = "sg_mrq_dd: "; + +// static const char * mrq_blk_s = "mrq: ordinary blocking"; +static const char * mrq_svb_s = "mrq: shared variable blocking (svb)"; +static const char * mrq_ob_s = "mrq: ordered blocking"; +static const char * mrq_vb_s = "mrq: variable blocking"; + + +#ifdef __GNUC__ +static int pr2serr_lk(const char * fmt, ...) + __attribute__ ((format (printf, 1, 2))); +#else +static int pr2serr_lk(const char * fmt, ...); +#endif + + +static int +pr2serr_lk(const char * fmt, ...) +{ + int n; + va_list args; + lock_guard<mutex> lk(strerr_mut); + + va_start(args, fmt); + n = vfprintf(stderr, fmt, args); + va_end(args); + return n; +} + +static void +usage(int pg_num) +{ + if (pg_num > 4) + goto page5; + if (pg_num > 3) + goto page4; + else if (pg_num > 2) + goto page3; + else if (pg_num > 1) + goto page2; + + pr2serr("Usage: sg_mrq_dd [bs=BS] [conv=CONV] [count=COUNT] [ibs=BS] " + "[if=IFILE*]\n" + " [iflag=FLAGS] [obs=BS] [of=OFILE*] " + "[oflag=FLAGS]\n" + " [seek=SEEK] [skip=SKIP] [--help] [--verify] " + "[--version]\n\n"); + pr2serr(" [bpt=BPT] [cdbsz=6|10|12|16] [cdl=CDL] " + "[dio=0|1]\n" + " [elemsz_kb=EKB] [ese=0|1] [fua=0|1|2|3] " + "[polled=NRQS]\n" + " [mrq=NRQS] [ofreg=OFREG] [sdt=SDT] " + "[sync=0|1]\n" + " [thr=THR] [time=0|1|2[,TO]] [verbose=VERB] " + "[--dry-run]\n" + " [--pre-fetch] [--verbose] [--version]\n\n" + " where: operands have the form name=value and are pecular to " + "'dd'\n" + " style commands, and options start with one or " + "two hyphens;\n" + " the main operands and options (shown in first group " + "above) are:\n" + " bs must be device logical block size (default " + "512)\n" + " conv comma separated list from: [nocreat,noerror," + "notrunc,\n" + " null,sync]\n" + " count number of blocks to copy (def: device size)\n" + " if file(s) or device(s) to read from (def: " + "stdin)\n" + " iflag comma separated list from: [00,coe,dio," + "direct,dpo,\n" + " dsync,excl,ff,fua,masync,mmap,mout_if,nodur," + "null,\n" + " order,qhead,qtail,random,same_fds,serial," + "wq_excl]\n" + " of file(s) or device(s) to write to (def: " + "/dev/null)\n" + " 'of=.' also outputs to /dev/null\n" + " oflag comma separated list from: [append,nocreat,\n" + " <<list from iflag>>]\n" + " seek block position to start writing to OFILE\n" + " skip block position to start reading from IFILE\n" + " --help|-h output this usage message then exit\n" + " --verify|-x do a verify (compare) operation [def: do a " + "copy]\n" + " --version|-V output version string then exit\n\n" + "Copy IFILE to OFILE, similar to dd command. A comma separated " + "list of files\n may be given for IFILE*, ditto for OFILE*. " + "This utility is specialized for\nSCSI devices and uses the " + "'multiple requests' (mrq) in a single invocation\nfacility in " + "version 4 of the sg driver unless mrq=0. Usually one or both\n" + "IFILE and OFILE will be sg devices. With the --verify option " + "it does a\nverify/compare operation instead of a copy. This " + "utility is Linux specific.\nUse '-hh', '-hhh', '-hhhh' or " + "'-hhhhh' for more information.\n" + ); + return; +page2: + pr2serr("Syntax: sg_mrq_dd [operands] [options]\n\n" + " the lesser used operands and option are:\n\n" + " bpt is blocks_per_transfer (default is 128)\n" + " cdbsz size of SCSI READ, WRITE or VERIFY cdb_s " + "(default is 10)\n" + " cdl command duration limits value 0 to 7 (def: " + "0 (no cdl))\n" + " dio is direct IO, 1->attempt, 0->indirect IO (def)\n" + " elemsz_kb=EKB scatter gather list element size in " + "kibibytes;\n" + " must be power of two, >= page_size " + "(typically 4)\n" + " ese=0|1 exit on secondary error when 1, else continue\n" + " fua force unit access: 0->don't(def), 1->OFILE, " + "2->IFILE,\n" + " 3->OFILE+IFILE\n" + " ibs IFILE logical block size, cannot differ from " + "obs or bs\n" + " hipri same as polled=NRQS; name 'hipri' is deprecated\n" + " mrq NRQS is number of cmds placed in each sg " + "ioctl\n" + " (def: 16). Does not set mrq hipri flag.\n" + " if mrq=0 does one-by-one, blocking " + "ioctl(SG_IO)s\n" + " obs OFILE logical block size, cannot differ from " + "ibs or bs\n" + " ofreg OFREG is regular file or pipe to send what is " + "read from\n" + " polled similar to mrq=NRQS operand but also sets " + "polled flag\n" + " IFILE in the first half of each shared element\n" + " sdt stall detection times: CRT[,ICT]. CRT: check " + "repetition\n" + " time (after first) in seconds; ICT: initial " + "check time\n" + " in milliseconds. Default: 3,300 . Use CRT=0 " + "to disable\n" + " sync 0->no sync(def), 1->SYNCHRONIZE CACHE on OFILE " + "after copy\n" + " thr is number of threads, must be > 0, default 4, " + "max 1024\n" + " time 0->no timing; 1/2->millisec/nanosec precision " + "(def: 1);\n" + " TO is command timeout in seconds (def: 60)\n" + " verbose increase verbosity (def: VERB=0)\n" + " --dry-run|-d prepare but bypass copy/read\n" + " --prefetch|-p with verify: do pre-fetch first\n" + " --verbose|-v increase verbosity of utility\n\n" + "Use '-hhh', '-hhhh' or '-hhhhh' for more information about " + "flags.\n" + ); + return; +page3: + pr2serr("Syntax: sg_mrq_dd [operands] [options]\n\n" + " where: 'iflag=<arg>' and 'oflag=<arg>' arguments are listed " + "below:\n\n" + " 00 use all zeros instead of if=IFILE (only in " + "iflag)\n" + " 00,ff generates blocks that contain own (32 bit be) " + "blk addr\n" + " append append output to OFILE (assumes OFILE is " + "regular file)\n" + " coe continue of error (reading, fills with zeros)\n" + " dio sets the SG_FLAG_DIRECT_IO in sg requests\n" + " direct sets the O_DIRECT flag on open()\n" + " dpo sets the DPO (disable page out) in SCSI READs " + "and WRITEs\n" + " dsync sets the O_SYNC flag on open()\n" + " excl sets the O_EXCL flag on open()\n" + " ff use all 0xff bytes instead of if=IFILE (only in " + "iflag)\n" + " fua sets the FUA (force unit access) in SCSI READs " + "and WRITEs\n" + " hipri same as 'polled'; name 'hipri' is deprecated\n" + " masync set 'more async' flag on this sg device\n" + " mmap setup mmap IO on IFILE or OFILE\n" + " mmap,mmap when used twice, doesn't call munmap()\n" + " mout_if set META_OUT_IF flag on control object\n" + " nocreat will fail rather than create OFILE\n" + " nodur turns off command duration calculations\n" + " no_thresh skip checking per fd max data xfer size\n" + " order require write ordering on sg->sg copy; only " + "for oflag\n" + " polled set POLLED flag and use blk_poll() for " + "completions\n" + " qhead queue new request at head of block queue\n" + " qtail queue new request at tail of block queue (def: " + "q at head)\n" + " random use random data instead of if=IFILE (only in " + "iflag)\n" + " same_fds each thread of a IOFILE pair uses same fds\n" + " serial serialize sg command execution (def: overlap)\n" + " wq_excl set SG_CTL_FLAGM_EXCL_WAITQ on this sg fd\n" + "\n" + "Copies IFILE to OFILE (and to OFILE2 if given). If IFILE and " + "OFILE are sg\ndevices 'shared' mode is selected. " + "When sharing, the data stays in a\nsingle " + "in-kernel buffer which is copied (or mmap-ed) to the user " + "space\nif the 'ofreg=OFREG' is given. Use '-hhhh' or '-hhhhh' " + "for more information.\n" + ); + return; +page4: + pr2serr("pack_id:\n" + "These are ascending integers, starting at 1, associated with " + "each issued\nSCSI command. When both IFILE and OFILE are sg " + "devices, then the READ in\neach read-write pair is issued an " + "even pack_id and its WRITE pair is\ngiven the pack_id one " + "higher (i.e. an odd number). This enables a\n'dmesg -w' " + "user to see that progress is being " + "made.\n\n"); + pr2serr("Debugging:\n" + "Apart from using one or more '--verbose' options which gets a " + "bit noisy\n'dmesg -w' can give a good overview " + "of what is happening.\nThat does a sg driver object tree " + "traversal that does minimal locking\nto make sure that each " + "traversal is 'safe'. So it is important to note\nthe whole " + "tree is not locked. This means for fast devices the overall\n" + "tree state may change while the traversal is occurring. For " + "example,\nit has been observed that both the read- and write- " + "sides of a request\nshare show they are in 'active' state " + "which should not be possible.\nIt occurs because the read-side " + "probably jumped out of active state and\nthe write-side " + "request entered it while some other nodes were being " + "printed.\n\n"); + pr2serr("Busy state:\n" + "Busy state (abbreviated to 'bsy' in the dmesg " + "output)\nis entered during request setup and completion. It " + "is intended to be\na temporary state. It should not block " + "but does sometimes (e.g. in\nblock_get_request()). Even so " + "that blockage should be short and if not\nthere is a " + "problem.\n\n"); + pr2serr("--verify :\n" + "For comparing IFILE with OFILE. Does repeated sequences of: " + "READ(ifile)\nand uses data returned to send to VERIFY(ofile, " + "BYTCHK=1). So the OFILE\ndevice/disk is doing the actual " + "comparison. Stops on first miscompare\nunless oflag=coe is " + "given\n\n"); + pr2serr("--prefetch :\n" + "Used with --verify option. Prepends a PRE-FETCH(ofile, IMMED) " + "to verify\nsequence. This should speed the trailing VERIFY by " + "making sure that\nthe data it needs for the comparison is " + "already in its cache.\n"); + return; +page5: + pr2serr(" IFILE and/or OFILE lists\n\n" + "For dd, its if= operand takes a single file (or device), ditto " + "for the of=\noperand. This utility extends that to " + "allowing a comma separated list\nof files. Ideally if multiple " + "IFILEs are given, the same number of OFILEs\nshould be given. " + "Simple expansions occur to make the list lengths equal\n" + "(e.g. if 5 IFILEs are given but no OFILEs, then OFILEs is " + "expanded to 5\n'/dev/null' files). IFILE,OFILE pairs with " + "the same list position are\ncalled a 'slice'. Each slice is " + "processed (i.e. copy or verify) in one or\nmore threads. The " + "number of threads must be >= the number of slices. Best\nif " + "the number of threads is an integer multiple of the number of " + "slices.\nThe file type of multiple IFILEs must be the same, " + "ditto for OFILEs.\nSupport for slices is for testing rather " + "than a general mechanism.\n"); +} + +static void +lk_print_command_len(const char *prefix, uint8_t * cmdp, int len, bool lock) +{ + if (lock) { + lock_guard<mutex> lk(strerr_mut); + + if (prefix && *prefix) + fputs(prefix, stderr); + sg_print_command_len(cmdp, len); + } else { + if (prefix && *prefix) + fputs(prefix, stderr); + sg_print_command_len(cmdp, len); + } +} + +static void +lk_chk_n_print4(const char * leadin, const struct sg_io_v4 * h4p, + bool raw_sinfo) +{ + lock_guard<mutex> lk(strerr_mut); + + if (h4p->usr_ptr) { + const cdb_arr_t * cdbp = (const cdb_arr_t *)h4p->usr_ptr; + + pr2serr("Failed cdb: "); + sg_print_command(cdbp->data()); + } else + pr2serr("cdb: <null>\n"); + sg_linux_sense_print(leadin, h4p->device_status, h4p->transport_status, + h4p->driver_status, (const uint8_t *)h4p->response, + h4p->response_len, raw_sinfo); +} + +static void +hex2stderr_lk(const uint8_t * b_str, int len, int no_ascii) +{ + lock_guard<mutex> lk(strerr_mut); + + hex2stderr(b_str, len, no_ascii); +} + +static int +system_wrapper(const char * cmd) +{ + int res; + + res = system(cmd); + if (WIFSIGNALED(res) && + (WTERMSIG(res) == SIGINT || WTERMSIG(res) == SIGQUIT)) + raise(WTERMSIG(res)); + return WEXITSTATUS(res); +} + +/* Flags decoded into abbreviations for those that are set, separated by + * '|' . */ +static char * +sg_flags_str(int flags, int b_len, char * b) +{ + int n = 0; + + if ((b_len < 1) || (! b)) + return b; + b[0] = '\0'; + if (SG_FLAG_DIRECT_IO & flags) { /* 0x1 */ + n += sg_scnpr(b + n, b_len - n, "DIO|"); + if (n >= b_len) + goto fini; + } + if (SG_FLAG_MMAP_IO & flags) { /* 0x4 */ + n += sg_scnpr(b + n, b_len - n, "MMAP|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_YIELD_TAG & flags) { /* 0x8 */ + n += sg_scnpr(b + n, b_len - n, "YTAG|"); + if (n >= b_len) + goto fini; + } + if (SG_FLAG_Q_AT_TAIL & flags) { /* 0x10 */ + n += sg_scnpr(b + n, b_len - n, "QTAI|"); + if (n >= b_len) + goto fini; + } + if (SG_FLAG_Q_AT_HEAD & flags) { /* 0x20 */ + n += sg_scnpr(b + n, b_len - n, "QHEA|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_DOUT_OFFSET & flags) { /* 0x40 */ + n += sg_scnpr(b + n, b_len - n, "DOFF|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_EVENTFD & flags) { /* 0x80 */ + n += sg_scnpr(b + n, b_len - n, "EVFD|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_COMPLETE_B4 & flags) { /* 0x100 */ + n += sg_scnpr(b + n, b_len - n, "CPL_B4|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_SIGNAL & flags) { /* 0x200 */ + n += sg_scnpr(b + n, b_len - n, "SIGNAL|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_IMMED & flags) { /* 0x400 */ + n += sg_scnpr(b + n, b_len - n, "IMM|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_POLLED & flags) { /* 0x800 */ + n += sg_scnpr(b + n, b_len - n, "POLLED|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_STOP_IF & flags) { /* 0x1000 */ + n += sg_scnpr(b + n, b_len - n, "STOPIF|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_DEV_SCOPE & flags) { /* 0x2000 */ + n += sg_scnpr(b + n, b_len - n, "DEV_SC|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_SHARE & flags) { /* 0x4000 */ + n += sg_scnpr(b + n, b_len - n, "SHARE|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_DO_ON_OTHER & flags) { /* 0x8000 */ + n += sg_scnpr(b + n, b_len - n, "DO_OTH|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_NO_DXFER & flags) { /* 0x10000 */ + n += sg_scnpr(b + n, b_len - n, "NOXFER|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_KEEP_SHARE & flags) { /* 0x20000 */ + n += sg_scnpr(b + n, b_len - n, "KEEP_SH|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_MULTIPLE_REQS & flags) { /* 0x40000 */ + n += sg_scnpr(b + n, b_len - n, "MRQS|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_ORDERED_WR & flags) { /* 0x80000 */ + n += sg_scnpr(b + n, b_len - n, "OWR|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_REC_ORDER & flags) { /* 0x100000 */ + n += sg_scnpr(b + n, b_len - n, "REC_O|"); + if (n >= b_len) + goto fini; + } + if (SGV4_FLAG_META_OUT_IF & flags) { /* 0x200000 */ + n += sg_scnpr(b + n, b_len - n, "MOUT_IF|"); + if (n >= b_len) + goto fini; + } + if (0 == n) + n += sg_scnpr(b + n, b_len - n, "<none>"); +fini: + if (n < b_len) { /* trim trailing '\' */ + if ('|' == b[n - 1]) + b[n - 1] = '\0'; + } else if ('|' == b[b_len - 1]) + b[b_len - 1] = '\0'; + return b; +} + +/* Info field decoded into abbreviations for those bits that are set, + * separated by '|' . */ +static char * +sg_info_str(int info, int b_len, char * b) +{ + int n = 0; + + if ((b_len < 1) || (! b)) + return b; + b[0] = '\0'; + if (SG_INFO_CHECK & info) { /* 0x1 */ + n += sg_scnpr(b + n, b_len - n, "CHK|"); + if (n >= b_len) + goto fini; + } + if (SG_INFO_DIRECT_IO & info) { /* 0x2 */ + n += sg_scnpr(b + n, b_len - n, "DIO|"); + if (n >= b_len) + goto fini; + } + if (SG_INFO_MIXED_IO & info) { /* 0x4 */ + n += sg_scnpr(b + n, b_len - n, "MIO|"); + if (n >= b_len) + goto fini; + } + if (SG_INFO_DEVICE_DETACHING & info) { /* 0x8 */ + n += sg_scnpr(b + n, b_len - n, "DETA|"); + if (n >= b_len) + goto fini; + } + if (SG_INFO_ABORTED & info) { /* 0x10 */ + n += sg_scnpr(b + n, b_len - n, "ABRT|"); + if (n >= b_len) + goto fini; + } + if (SG_INFO_MRQ_FINI & info) { /* 0x20 */ + n += sg_scnpr(b + n, b_len - n, "MRQF|"); + if (n >= b_len) + goto fini; + } +fini: + if (n < b_len) { /* trim trailing '\' */ + if ('|' == b[n - 1]) + b[n - 1] = '\0'; + } else if ('|' == b[b_len - 1]) + b[b_len - 1] = '\0'; + return b; +} + +static void +v4hdr_out_lk(const char * leadin, const sg_io_v4 * h4p, int id, bool chk_info) +{ + lock_guard<mutex> lk(strerr_mut); + char b[80]; + + if (leadin) + pr2serr("%s [id=%d]:\n", leadin, id); + if (('Q' != h4p->guard) || (0 != h4p->protocol) || + (0 != h4p->subprotocol)) + pr2serr(" <<<sg_io_v4 _NOT_ properly set>>>\n"); + pr2serr(" pointers: cdb=%s sense=%s din=%p dout=%p\n", + (h4p->request ? "y" : "NULL"), (h4p->response ? "y" : "NULL"), + (void *)h4p->din_xferp, (void *)h4p->dout_xferp); + pr2serr(" lengths: cdb=%u sense=%u din=%u dout=%u\n", + h4p->request_len, h4p->max_response_len, h4p->din_xfer_len, + h4p->dout_xfer_len); + pr2serr(" flags=0x%x request_extra{pack_id}=%d\n", + h4p->flags, h4p->request_extra); + pr2serr(" flags set: %s\n", sg_flags_str(h4p->flags, sizeof(b), b)); + pr2serr(" %s OUT:\n", leadin); + pr2serr(" response_len=%d driver/transport/device_status=" + "0x%x/0x%x/0x%x\n", h4p->response_len, h4p->driver_status, + h4p->transport_status, h4p->device_status); + pr2serr(" info=0x%x din_resid=%u dout_resid=%u spare_out=%u " + "dur=%u\n", + h4p->info, h4p->din_resid, h4p->dout_resid, h4p->spare_out, + h4p->duration); + if (chk_info && (SG_INFO_CHECK & h4p->info)) + pr2serr(" >>>> info: %s\n", sg_info_str(h4p->info, sizeof(b), b)); +} + +static void +fetch_sg_version(void) +{ + FILE * fp; + char b[96]; + + have_sg_version = false; + sg_version = 0; + fp = fopen(PROC_SCSI_SG_VERSION, "r"); + if (fp && fgets(b, sizeof(b) - 1, fp)) { + if (1 == sscanf(b, "%d", &sg_version)) + have_sg_version = !!sg_version; + } else { + int j, k, l; + + if (fp) + fclose(fp); + fp = fopen(SYS_SCSI_SG_VERSION, "r"); + if (fp && fgets(b, sizeof(b) - 1, fp)) { + if (3 == sscanf(b, "%d.%d.%d", &j, &k, &l)) { + sg_version = (j * 10000) + (k * 100) + l; + have_sg_version = !!sg_version; + } + } + if (NULL == fp) + pr2serr("The sg driver may not be loaded\n"); + } + if (fp) + fclose(fp); +} + +static void +calc_duration_throughput(int contin) +{ + struct timeval end_tm, 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 = 0.0; + for (auto && cvp : gcoll.cp_ver_arr) { + if (cvp.state == cp_ver_pair_t::my_state::empty) + break; + b += (double)(cvp.dd_count - cvp.out_rem_count.load()); + } + b *= (double)gcoll.bs; + pr2serr("time to %s data %s %d.%06d secs", + (gcoll.verify ? "verify" : "copy"), (contin ? "so far" : "was"), + (int)res_tm.tv_sec, (int)res_tm.tv_usec); + if ((a > 0.00001) && (b > 511)) + pr2serr(", %.2f MB/sec\n", b / (a * 1000000.0)); + else + pr2serr("\n"); +} + +static void +print_stats(const char * str) +{ + bool show_slice = ((gcoll.cp_ver_arr.size() > 1) && + (gcoll.cp_ver_arr[1].state != + cp_ver_pair_t::my_state::empty)); + int k = 0; + int64_t infull, outfull; + + for (auto && cvp : gcoll.cp_ver_arr) { + ++k; + if (cvp.state == cp_ver_pair_t::my_state::empty) + break; + if (cvp.state == cp_ver_pair_t::my_state::ignore) { + pr2serr(">>> IGNORING slice: %d\n", k); + continue; + } + if (show_slice) + pr2serr(">>> slice: %d\n", k); + if (0 != cvp.out_rem_count.load()) + pr2serr(" remaining block count=%" PRId64 "\n", + cvp.out_rem_count.load()); + infull = cvp.dd_count - cvp.in_rem_count.load(); + pr2serr("%s%" PRId64 "+%d records in\n", str, + infull, cvp.in_partial.load()); + + if (cvp.out_type == FT_DEV_NULL) + pr2serr("%s0+0 records out\n", str); + else { + outfull = cvp.dd_count - cvp.out_rem_count.load(); + pr2serr("%s%" PRId64 "+%d records %s\n", str, + outfull, cvp.out_partial.load(), + (gcoll.verify ? "verified" : "out")); + } + } +} + +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,"); + if (do_time > 0) + calc_duration_throughput(0); + print_stats(""); + kill(getpid(), sig); +} + +static void +siginfo_handler(int sig) +{ + if (sig) { ; } /* unused, dummy to suppress warning */ + pr2serr("Progress report, continuing ...\n"); + if (do_time > 0) + calc_duration_throughput(1); + print_stats(" "); +} + +/* Usually this signal (SIGUSR2) will be caught by the timed wait in the + * sig_listen_thread thread but some might slip through while the timed + * wait is being re-armed or after that thread is finished. This handler + * acts as a backstop. */ +static void +siginfo2_handler(int sig) +{ + if (sig) { ; } /* unused, dummy to suppress warning */ + ++num_fallthru_sigusr2; +} + +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); + } +} + +/* Make safe_strerror() thread safe */ +static char * +tsafe_strerror(int code, char * ebp) +{ + lock_guard<mutex> lk(strerr_mut); + char * cp; + + cp = safe_strerror(code); + strncpy(ebp, cp, STRERR_BUFF_LEN); + ebp[STRERR_BUFF_LEN - 1] = '\0'; + return ebp; +} + + +static int +dd_filetype(const char * filename, off_t & st_size) +{ + struct stat st; + size_t len = strlen(filename); + + 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)) || + (DEV_ZERO_MINOR_NUM == minor(st.st_rdev)))) + return FT_DEV_NULL; /* treat /dev/null + /dev/zero the same */ + if (SCSI_GENERIC_MAJOR == major(st.st_rdev)) + return FT_SG; + if (SCSI_TAPE_MAJOR == major(st.st_rdev)) + return FT_ST; + return FT_CHAR; + } else if (S_ISBLK(st.st_mode)) + return FT_BLOCK; + else if (S_ISFIFO(st.st_mode)) + return FT_FIFO; + st_size = st.st_size; + return FT_OTHER; +} + +/* Returns reserved_buffer_size/mmap_size if success, else 0 for failure */ +static int +sg_prepare_resbuf(int fd, struct global_collection *clp, bool is_in, + uint8_t **mmpp) +{ + static bool done = false; + bool no_dur = is_in ? clp->in_flags.no_dur : clp->out_flags.no_dur; + bool masync = is_in ? clp->in_flags.masync : clp->out_flags.masync; + bool wq_excl = is_in ? clp->in_flags.wq_excl : clp->out_flags.wq_excl; + bool skip_thresh = is_in ? clp->in_flags.no_thresh : + clp->out_flags.no_thresh; + int elem_sz = clp->elem_sz; + int res, t, num, err; + uint8_t *mmp; + struct sg_extended_info sei {}; + struct sg_extended_info * seip = &sei; + + res = ioctl(fd, SG_GET_VERSION_NUM, &t); + if ((res < 0) || (t < 40000)) { + if (ioctl(fd, SG_GET_RESERVED_SIZE, &num) < 0) { + perror("SG_GET_RESERVED_SIZE ioctl failed"); + return 0; + } + if (! done) { + done = true; + pr2serr_lk("%ssg driver prior to 4.0.00, reduced functionality\n", + my_name); + } + goto bypass; + } + if (elem_sz >= 4096) { + seip->sei_rd_mask |= SG_SEIM_SGAT_ELEM_SZ; + res = ioctl(fd, SG_SET_GET_EXTENDED, seip); + if (res < 0) + pr2serr_lk("sg_mrq_dd: %s: SG_SET_GET_EXTENDED(SGAT_ELEM_SZ) rd " + "error: %s\n", __func__, strerror(errno)); + if (elem_sz != (int)seip->sgat_elem_sz) { + seip->sei_wr_mask |= SG_SEIM_SGAT_ELEM_SZ; + seip->sgat_elem_sz = elem_sz; + res = ioctl(fd, SG_SET_GET_EXTENDED, seip); + if (res < 0) + pr2serr_lk("sg_mrq_dd: %s: SG_SET_GET_EXTENDED(SGAT_ELEM_SZ) " + "wr error: %s\n", __func__, strerror(errno)); + } + } + if (no_dur || masync || skip_thresh) { + seip->sei_wr_mask |= SG_SEIM_CTL_FLAGS; + if (no_dur) { + seip->ctl_flags_wr_mask |= SG_CTL_FLAGM_NO_DURATION; + seip->ctl_flags |= SG_CTL_FLAGM_NO_DURATION; + } + if (masync) { + seip->ctl_flags_wr_mask |= SG_CTL_FLAGM_MORE_ASYNC; + seip->ctl_flags |= SG_CTL_FLAGM_MORE_ASYNC; + } + if (wq_excl) { + seip->ctl_flags_wr_mask |= SG_CTL_FLAGM_EXCL_WAITQ; + seip->ctl_flags |= SG_CTL_FLAGM_EXCL_WAITQ; + } + if (skip_thresh) { + seip->tot_fd_thresh = 0; + sei.sei_wr_mask |= SG_SEIM_TOT_FD_THRESH; + } + res = ioctl(fd, SG_SET_GET_EXTENDED, seip); + if (res < 0) + pr2serr_lk("sg_mrq_dd: %s: SG_SET_GET_EXTENDED(NO_DURATION) " + "error: %s\n", __func__, strerror(errno)); + } +bypass: + num = clp->bs * clp->bpt; + res = ioctl(fd, SG_SET_RESERVED_SIZE, &num); + if (res < 0) { + perror("sg_mrq_dd: SG_SET_RESERVED_SIZE error"); + return 0; + } else { + int nn; + + res = ioctl(fd, SG_GET_RESERVED_SIZE, &nn); + if (res < 0) { + perror("sg_mrq_dd: SG_GET_RESERVED_SIZE error"); + return 0; + } + if (nn < num) { + pr2serr_lk("%s: SG_GET_RESERVED_SIZE shows size truncated, " + "wanted %d got %d\n", __func__, num, nn); + return 0; + } + if (mmpp) { + mmp = (uint8_t *)mmap(NULL, num, PROT_READ | PROT_WRITE, + MAP_SHARED, fd, 0); + if (MAP_FAILED == mmp) { + err = errno; + pr2serr_lk("sg_mrq_dd: %s: sz=%d, fd=%d, mmap() failed: %s\n", + __func__, num, fd, strerror(err)); + return 0; + } + *mmpp = mmp; + } + } + t = 1; + res = ioctl(fd, SG_SET_FORCE_PACK_ID, &t); + if (res < 0) + perror("sg_mrq_dd: SG_SET_FORCE_PACK_ID error"); + if (clp->unit_nanosec) { + seip->sei_wr_mask |= SG_SEIM_CTL_FLAGS; + seip->ctl_flags_wr_mask |= SG_CTL_FLAGM_TIME_IN_NS; + seip->ctl_flags |= SG_CTL_FLAGM_TIME_IN_NS; + if (ioctl(fd, SG_SET_GET_EXTENDED, seip) < 0) { + res = -1; + pr2serr_lk("ioctl(EXTENDED(TIME_IN_NS)) failed, errno=%d %s\n", + errno, strerror(errno)); + } + } + if (clp->verbose) { + t = 1; + /* more info in the kernel log */ + res = ioctl(fd, SG_SET_DEBUG, &t); + if (res < 0) + perror("sg_mrq_dd: SG_SET_DEBUG error"); + } + return (res < 0) ? 0 : num; +} + +static int +sg_in_open(struct global_collection *clp, const string & inf, uint8_t **mmpp, + int * mmap_lenp) +{ + int fd, err, n; + int flags = O_RDWR; + char ebuff[EBUFF_SZ]; + const char * fnp = inf.c_str(); + + if (clp->in_flags.direct) + flags |= O_DIRECT; + if (clp->in_flags.excl) + flags |= O_EXCL; + if (clp->in_flags.dsync) + flags |= O_SYNC; + + if ((fd = open(fnp, flags)) < 0) { + err = errno; + snprintf(ebuff, EBUFF_SZ, "%s: could not open %s for sg reading", + __func__, fnp); + perror(ebuff); + return -sg_convert_errno(err); + } + n = sg_prepare_resbuf(fd, clp, true, mmpp); + if (n <= 0) { + close(fd); + return -SG_LIB_FILE_ERROR; + } + if (mmap_lenp) + *mmap_lenp = n; + return fd; +} + +static int +sg_out_open(struct global_collection *clp, const string & outf, + uint8_t **mmpp, int * mmap_lenp) +{ + int fd, err, n; + int flags = O_RDWR; + char ebuff[EBUFF_SZ]; + const char * fnp = outf.c_str(); + + if (clp->out_flags.direct) + flags |= O_DIRECT; + if (clp->out_flags.excl) + flags |= O_EXCL; + if (clp->out_flags.dsync) + flags |= O_SYNC; + + if ((fd = open(fnp, flags)) < 0) { + err = errno; + snprintf(ebuff, EBUFF_SZ, "%s: could not open %s for sg %s", + __func__, fnp, (clp->verify ? "verifying" : "writing")); + perror(ebuff); + return -sg_convert_errno(err); + } + n = sg_prepare_resbuf(fd, clp, false, mmpp); + if (n <= 0) { + close(fd); + return -SG_LIB_FILE_ERROR; + } + if (mmap_lenp) + *mmap_lenp = n; + return fd; +} + +static int +reg_file_open(struct global_collection *clp, const string & fn_s, + bool for_wr) +{ + int fd, flags; + char ebuff[EBUFF_SZ]; + + if (for_wr) { + flags = O_WRONLY; + if (! clp->out_flags.nocreat) + flags |= O_CREAT; + if (clp->out_flags.append) + flags |= O_APPEND; + } else + flags = O_RDONLY; + if (clp->in_flags.direct) + flags |= O_DIRECT; + if (clp->in_flags.excl) + flags |= O_EXCL; + if (clp->in_flags.dsync) + flags |= O_SYNC; + + if (for_wr) + fd = open(fn_s.c_str(), flags, 0666); + else + fd = open(fn_s.c_str(), flags); + if (fd < 0) { + int err = errno; + snprintf(ebuff, EBUFF_SZ, "%scould not open %s for %sing ", + my_name, fn_s.c_str(), (for_wr ? "writ" : "read")); + perror(ebuff); + return -err; + } + return fd; +} + +get_next_res_t +cp_ver_pair_t::get_next(int desired_num_blks) +{ + int64_t expected, desired; + + if (desired_num_blks <= 0) { + if (desired_num_blks < 0) { + if (next_count_pos.load() >= 0) /* flag error detection */ + next_count_pos.store(desired_num_blks); + } + return make_pair(next_count_pos.load(), 0); + } + + expected = next_count_pos.load(); + do { /* allowed to race with other threads */ + if (expected < 0) + return make_pair(0, (int)expected); + else if (expected >= dd_count) + return make_pair(expected, 0); /* clean finish */ + desired = expected + desired_num_blks; + if (desired > dd_count) + desired = dd_count; + } while (! next_count_pos.compare_exchange_strong(expected, desired)); + return make_pair(expected, desired - expected); +} + +/* 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; + uint8_t rcBuff[RCAP16_REPLY_LEN] = {}; + + res = sg_ll_readcap_10(sg_fd, 0, 0, rcBuff, READ_CAP_REPLY_LEN, false, 0); + if (0 != res) + goto bad; + + 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, + 0); + if (0 != res) + goto bad; + *num_sect = sg_get_unaligned_be64(rcBuff + 0) + 1; + *sect_sz = sg_get_unaligned_be32(rcBuff + 8); + } else { + /* take care not to sign extend values > 0x7fffffff */ + *num_sect = (int64_t)sg_get_unaligned_be32(rcBuff + 0) + 1; + *sect_sz = sg_get_unaligned_be32(rcBuff + 4); + } + return 0; +bad: + *num_sect = 0; + *sect_sz = 0; + return res; +} + +/* 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); + #else + unsigned long ul; + + if (ioctl(sg_fd, BLKGETSIZE, &ul) < 0) { + perror("BLKGETSIZE ioctl error"); + return -1; + } + *num_sect = (int64_t)ul; + #endif + } + return 0; +#else + *num_sect = 0; + *sect_sz = 0; + return -1; +#endif +} + +static void +flag_all_stop(struct global_collection * clp) +{ + for (auto && elem : clp->cp_ver_arr) { + if (elem.state == cp_ver_pair_t::my_state::empty) + break; + elem.next_count_pos.store(-1); + } +} + +/* Has an infinite loop doing a timed wait for any signals in signal_set. + * After each timeout (300 ms) checks if the most_recent_pack_id atomic + * integer has changed. If not after another two timeouts announces a stall + * has been detected. If shutting down atomic is true breaks out of loop and + * shuts down this thread. Other than that, this thread is normally cancelled + * by the main thread, after other threads have exited. */ +static void +sig_listen_thread(struct global_collection * clp) +{ + bool stall_reported = false; + int prev_pack_id = 0; + int sig_number, pack_id; + uint32_t ict_ms = (clp->sdt_ict ? clp->sdt_ict : DEF_SDT_ICT_MS); + struct timespec ts; + struct timespec * tsp = &ts; + + tsp->tv_sec = ict_ms / 1000; + tsp->tv_nsec = (ict_ms % 1000) * 1000 * 1000; /* DEF_SDT_ICT_MS */ + listen_t_tid = gettid(); // to facilitate sending SIGUSR2 to exit + while (1) { + sig_number = sigtimedwait(&signal_set, NULL, tsp); + if (sig_number < 0) { + int err = errno; + + /* EAGAIN implies a timeout */ + if ((EAGAIN == err) && (clp->sdt_crt > 0)) { + pack_id = clp->most_recent_pack_id.load(); + if ((pack_id > 0) && (pack_id == prev_pack_id)) { + if (! stall_reported) { + stall_reported = true; + tsp->tv_sec = clp->sdt_crt; + tsp->tv_nsec = 0; + pr2serr_lk("%s: first stall at pack_id=%d detected\n", + __func__, pack_id); + } else + pr2serr_lk("%s: subsequent stall at pack_id=%d\n", + __func__, pack_id); + // following command assumes linux bash or similar shell + system_wrapper("cat /proc/scsi/sg/debug >> /dev/stderr\n"); + // system_wrapper("/usr/bin/dmesg\n"); + } else + prev_pack_id = pack_id; + } else if (EAGAIN != err) + pr2serr_lk("%s: sigtimedwait() errno=%d\n", __func__, err); + } + if (SIGINT == sig_number) { + pr2serr_lk("%sinterrupted by SIGINT\n", my_name); + flag_all_stop(clp); + shutting_down.store(true); + sigprocmask(SIG_SETMASK, &orig_signal_set, NULL); + raise(SIGINT); + break; + } + if (SIGUSR2 == sig_number) { + if (clp->verbose > 2) + pr2serr_lk("%s: SIGUSR2 received\n", __func__); + break; + } if (shutting_down) + break; + } /* end of while loop */ + if (clp->verbose > 3) + pr2serr_lk("%s: exiting\n", __func__); +} + +static bool +sg_share_prepare(int write_side_fd, int read_side_fd, int id, bool vb_b) +{ + struct sg_extended_info sei {}; + struct sg_extended_info * seip = &sei; + + seip->sei_wr_mask |= SG_SEIM_SHARE_FD; + seip->sei_rd_mask |= SG_SEIM_SHARE_FD; + seip->share_fd = read_side_fd; + if (ioctl(write_side_fd, SG_SET_GET_EXTENDED, seip) < 0) { + pr2serr_lk("tid=%d: ioctl(EXTENDED(shared_fd=%d), failed " + "errno=%d %s\n", id, read_side_fd, errno, + strerror(errno)); + return false; + } + if (vb_b) + pr2serr_lk("%s: tid=%d: ioctl(EXTENDED(shared_fd)) ok, " + "read_side_fd=%d, write_side_fd=%d\n", __func__, id, + read_side_fd, write_side_fd); + return true; +} + +static void +sg_take_snap(int sg_fd, int id, bool vb_b) +{ + struct sg_extended_info sei {}; + struct sg_extended_info * seip = &sei; + + seip->sei_wr_mask |= SG_SEIM_CTL_FLAGS; + seip->sei_rd_mask |= SG_SEIM_CTL_FLAGS; + seip->ctl_flags_wr_mask |= SG_CTL_FLAGM_SNAP_DEV; + seip->ctl_flags &= ~SG_CTL_FLAGM_SNAP_DEV; /* 0 --> append */ + if (ioctl(sg_fd, SG_SET_GET_EXTENDED, seip) < 0) { + pr2serr_lk("tid=%d: ioctl(EXTENDED(SNAP_DEV), failed errno=%d %s\n", + id, errno, strerror(errno)); + return; + } + if (vb_b) + pr2serr_lk("tid=%d: ioctl(SNAP_DEV) ok\n", id); +} + +// <<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<< +/* Each thread's "main" function */ +static void +read_write_thread(struct global_collection * clp, int thr_idx, int slice_idx, + bool singleton) +{ + Rq_elem rel {}; + Rq_elem * rep = &rel; + int n, sz, fd, vb, err, seg_blks; + int res = 0; + int num_sg = 0; + bool own_infd = false; + bool in_is_sg, in_mmap, out_is_sg, out_mmap; + bool own_outfd = false; + bool only_one_sg = false; + struct cp_ver_pair_t & cvp = clp->cp_ver_arr[slice_idx]; + class scat_gath_iter i_sg_it(clp->i_sgl); + class scat_gath_iter o_sg_it(clp->o_sgl); + const string & inf = clp->inf_v[slice_idx]; + const string & outf = clp->outf_v[slice_idx]; + vector<cdb_arr_t> a_cdb; + vector<struct sg_io_v4> a_v4; + + vb = clp->verbose; + sz = clp->mrq_num * clp->bpt * clp->bs; + in_is_sg = (FT_SG == clp->in_type); + in_mmap = (in_is_sg && (clp->in_flags.mmap > 0)); + out_is_sg = (FT_SG == clp->out_type); + out_mmap = (out_is_sg && (clp->out_flags.mmap > 0)); + rep->clp = clp; + rep->id = thr_idx; + rep->bs = clp->bs; + + if (in_is_sg && out_is_sg) + rep->both_sg = true; + else if (in_is_sg || out_is_sg) { + only_one_sg = true; + if (in_is_sg) + rep->only_in_sg = true; + else + rep->only_out_sg = true; + } + + if (vb > 2) { + pr2serr_lk("%d <-- Starting worker thread, slice=%d\n", thr_idx, + slice_idx); + if (vb > 3) + pr2serr_lk(" %s ---> %s\n", inf.c_str(), outf.c_str()); + } + if (! (rep->both_sg || in_mmap)) { + rep->buffp = sg_memalign(sz, 0 /* page align */, &rep->alloc_bp, + false); + if (NULL == rep->buffp) { + pr2serr_lk("Failed to allocate %d bytes, exiting\n", sz); + return; + } + } + rep->infd = clp->in0fd; + rep->outfd = clp->out0fd; + rep->outregfd = clp->outregfd; + rep->rep_count = 0; + rep->in_follow_on = -1; + rep->out_follow_on = -1; + if (cvp.state == cp_ver_pair_t::my_state::init) + cvp.state = cp_ver_pair_t::my_state::underway; + if (FT_OTHER == cvp.in_type) { + fd = reg_file_open(clp, inf, false); + if (fd < 0) { + pr2serr_lk("[%d]: unable to open IFILE of slice=%d\n", thr_idx, + slice_idx); + return; + } + rep->infd = fd; + } + if (FT_OTHER == cvp.out_type) { + fd = reg_file_open(clp, outf, true); + if (fd < 0) { + pr2serr_lk("[%d]: unable to open OFILE of slice=%d\n", thr_idx, + slice_idx); + return; + } + rep->outfd = fd; + } + + if (rep->infd == rep->outfd) { + if (in_is_sg) + rep->same_sg = true; + } + if (clp->in_flags.random) { +#ifdef HAVE_GETRANDOM + ssize_t ssz = getrandom(&rep->seed, sizeof(rep->seed), GRND_NONBLOCK); + + if (ssz < (ssize_t)sizeof(rep->seed)) { + pr2serr_lk("[%d] %s: getrandom() failed, ret=%d\n", thr_idx, + __func__, (int)ssz); + rep->seed = (long)time(NULL); + } +#else + rep->seed = (long)time(NULL); /* use seconds since epoch as proxy */ +#endif + if (vb > 1) + pr2serr_lk("[%d] %s: seed=%ld\n", thr_idx, __func__, rep->seed); +#ifdef HAVE_SRAND48_R + srand48_r(rep->seed, &rep->drand); +#else + srand48(rep->seed); +#endif + } + + if (in_is_sg && inf.size()) { + if ((clp->in_flags.same_fds || (0 == thr_idx)) && + (cvp.in_fd >= 0)) + fd = cvp.in_fd; + else { + fd = sg_in_open(clp, inf, (in_mmap ? &rep->buffp : NULL), + (in_mmap ? &rep->mmap_len : NULL)); + if (fd < 0) + goto fini; + own_infd = true; + if (cvp.in_fd < 0) + cvp.in_fd = fd; + } + rep->infd = fd; + rep->mmap_active = in_mmap ? clp->in_flags.mmap : 0; + if (in_mmap && (vb > 4)) + pr2serr_lk("[%d] %s: mmap buffp=%p\n", thr_idx, __func__, + rep->buffp); + ++num_sg; + if (vb > 2) + pr2serr_lk("[%d]: opened local sg IFILE\n", thr_idx); + } + if (out_is_sg && outf.size()) { + if ((clp->out_flags.same_fds || (0 == thr_idx)) && + (cvp.out_fd >= 0)) + fd = cvp.out_fd; + else { + fd = sg_out_open(clp, outf, (out_mmap ? &rep->buffp : NULL), + (out_mmap ? &rep->mmap_len : NULL)); + if (fd < 0) + goto fini; + own_outfd = true; + if (cvp.out_fd < 0) + cvp.out_fd = fd; + } + rep->outfd = fd; + if (! rep->mmap_active) + rep->mmap_active = out_mmap ? clp->out_flags.mmap : 0; + if (out_mmap && (vb > 4)) + pr2serr_lk("[%d]: mmap buffp=%p\n", thr_idx, rep->buffp); + ++num_sg; + if (vb > 2) + pr2serr_lk("[%d]: opened local sg OFILE\n", thr_idx); + } + if (vb > 2) { + if (in_is_sg && (! own_infd)) + pr2serr_lk("[%d]: using global sg IFILE, fd=%d\n", thr_idx, + rep->infd); + if (out_is_sg && (! own_outfd)) + pr2serr_lk("[%d]: using global sg OFILE, fd=%d\n", thr_idx, + rep->outfd); + } + if (rep->both_sg) + rep->has_share = sg_share_prepare(rep->outfd, rep->infd, thr_idx, + vb > 9); + if (vb > 9) + pr2serr_lk("[%d]: has_share=%s\n", thr_idx, + (rep->has_share ? "true" : "false")); + // share_and_ofreg = (rep->has_share && (rep->outregfd >= 0)); + + /* vvvvvvvvvvvvvv Main segment copy loop vvvvvvvvvvvvvvvvvvvvvvv */ + while (! shutting_down) { + get_next_res_t gnr = cvp.get_next(clp->mrq_num * clp->bpt); + + seg_blks = gnr.second; + if (seg_blks <= 0) { + if (seg_blks < 0) + res = -seg_blks; + else + cvp.state = cp_ver_pair_t::my_state::finished; + break; + } + if (! i_sg_it.set_by_blk_idx(gnr.first)) { + lock_guard<mutex> lk(strerr_mut); + + pr2serr_lk("[%d]: input set_by_blk_idx() failed\n", thr_idx); + i_sg_it.dbg_print("input after set_by_blk_idx", false, vb > 5); + res = 2; + break; + } + if (! o_sg_it.set_by_blk_idx(gnr.first)) { + pr2serr_lk("[%d]: output set_by_blk_idx() failed\n", thr_idx); + res = 3; + break; + } + if (rep->both_sg) { + uint32_t nn = (2 * clp->mrq_num) + 4; + + if (a_cdb.capacity() < nn) + a_cdb.reserve(nn); + if (a_v4.capacity() < nn) + a_v4.reserve(nn); + if (clp->mrq_eq_0) + res = do_both_sg_segment_mrq0(rep, i_sg_it, o_sg_it, + seg_blks); + else + res = do_both_sg_segment(rep, i_sg_it, o_sg_it, seg_blks, + a_cdb, a_v4); + if (res < 0) + break; + } else if (only_one_sg) { + uint32_t nn = clp->mrq_num + 4; + + if (a_cdb.capacity() < nn) + a_cdb.reserve(nn); + if (a_v4.capacity() < nn) + a_v4.reserve(nn); + res = do_normal_sg_segment(rep, i_sg_it, o_sg_it, seg_blks, a_cdb, + a_v4); + if (res < 0) + break; + } else { + res = do_normal_normal_segment(rep, i_sg_it, o_sg_it, seg_blks); + if (res < 0) + break; + } + if (singleton) { + { + lock_guard<mutex> lk(clp->infant_mut); + + clp->processed = true; + } /* this unlocks lk */ + clp->infant_cv.notify_one(); + singleton = false; + } + if (rep->stop_after_write || rep->stop_now) { + shutting_down = true; + break; + } + } /* ^^^^^^^^^^ end of main while loop which copies segments ^^^^^^ */ + + if (shutting_down) { + if (vb > 3) + pr2serr_lk("%s: t=%d: shutting down\n", __func__, rep->id); + goto fini; + } + if (singleton) { + { + lock_guard<mutex> lk(clp->infant_mut); + + clp->processed = true; + } /* this unlocks lk */ + clp->infant_cv.notify_one(); + } + if (res < 0) { + if (seg_blks >= 0) + cvp.get_next(-1); /* flag error to main */ + pr2serr_lk("%s: t=%d: aborting, res=%d\n", __func__, rep->id, res); + } + +fini: + + if ((1 == rep->mmap_active) && (rep->mmap_len > 0)) { + if (munmap(rep->buffp, rep->mmap_len) < 0) { + err = errno; + char bb[64]; + + pr2serr_lk("thread=%d: munmap() failed: %s\n", rep->id, + tsafe_strerror(err, bb)); + } + if (vb > 4) + pr2serr_lk("thread=%d: munmap(%p, %d)\n", rep->id, rep->buffp, + rep->mmap_len); + rep->mmap_active = 0; + } + + if (own_infd && (rep->infd >= 0)) { + if (vb && in_is_sg) { + if (ioctl(rep->infd, SG_GET_NUM_WAITING, &n) >= 0) { + if (n > 0) + pr2serr_lk("%s: tid=%d: num_waiting=%d prior close(in)\n", + __func__, rep->id, n); + } else { + err = errno; + pr2serr_lk("%s: [%d] ioctl(SG_GET_NUM_WAITING) errno=%d: " + "%s\n", __func__, rep->id, err, strerror(err)); + } + } + close(rep->infd); + } + if (own_outfd && (rep->outfd >= 0)) { + if (vb && out_is_sg) { + if (ioctl(rep->outfd, SG_GET_NUM_WAITING, &n) >= 0) { + if (n > 0) + pr2serr_lk("%s: tid=%d: num_waiting=%d prior " + "close(out)\n", __func__, rep->id, n); + } else { + err = errno; + pr2serr_lk("%s: [%d] ioctl(SG_GET_NUM_WAITING) errno=%d: " + "%s\n", __func__, rep->id, err, strerror(err)); + } + } + close(rep->outfd); + } + /* pass stats back to read-side */ + if (vb > 3) + pr2serr_lk("%s: [%d] leaving: in/out local count=%" PRId64 "/%" + PRId64 "\n", __func__, rep->id, rep->in_local_count, + rep->out_local_count); + cvp.in_rem_count -= rep->in_local_count; + cvp.out_rem_count -= rep->out_local_count; + cvp.in_partial += rep->in_local_partial; + cvp.out_partial += rep->out_local_partial; + cvp.sum_of_resids += rep->in_resid_bytes; + if (rep->alloc_bp) + free(rep->alloc_bp); +} + +/* N.B. Returns 'blocks' is successful, lesser positive number if there was + * a short read, or an error code which is negative. */ +static int +normal_in_rd(Rq_elem * rep, int64_t lba, int blocks, int d_boff) +{ + struct global_collection * clp = rep->clp; + int res, err; + int id = rep->id; + uint8_t * bp; + char strerr_buff[STRERR_BUFF_LEN]; + + if (clp->verbose > 4) + pr2serr_lk("[%d] %s: lba=%" PRIu64 ", blocks=%d, d_boff=%d\n", id, + __func__, lba, blocks, d_boff); + if (FT_RANDOM_0_FF == clp->in_type) { + int k, j; + const int jbump = sizeof(uint32_t); + long rn; + uint8_t * bp; + + if (clp->in_flags.zero && clp->in_flags.ff && (rep->bs >= 4)) { + uint32_t pos = (uint32_t)lba; + uint32_t off; + + for (k = 0, off = 0; k < blocks; ++k, off += rep->bs, ++pos) { + for (j = 0; j < (rep->bs - 3); j += 4) + sg_put_unaligned_be32(pos, rep->buffp + off + j); + } + } else if (clp->in_flags.zero) + memset(rep->buffp + d_boff, 0, blocks * rep->bs); + else if (clp->in_flags.ff) + memset(rep->buffp + d_boff, 0xff, blocks * rep->bs); + else { + bp = rep->buffp + d_boff; + for (k = 0; k < blocks; ++k, bp += rep->bs) { + for (j = 0; j < rep->bs; j += jbump) { + /* mrand48 takes uniformly from [-2^31, 2^31) */ +#ifdef HAVE_SRAND48_R + mrand48_r(&rep->drand, &rn); +#else + rn = mrand48(); +#endif + *((uint32_t *)(bp + j)) = (uint32_t)rn; + } + } + } + return blocks; + } + + if (clp->in_type != FT_FIFO) { + int64_t pos = lba * rep->bs; + + if (rep->in_follow_on != pos) { + if (lseek64(rep->infd, pos, SEEK_SET) < 0) { + err = errno; + pr2serr_lk("[%d] %s: >> lseek64(%" PRId64 "): %s\n", id, + __func__, pos, safe_strerror(err)); + return -err; + } + rep->in_follow_on = pos; + } + } + bp = rep->buffp + d_boff; + while (((res = read(rep->infd, bp, blocks * rep->bs)) < 0) && + ((EINTR == errno) || (EAGAIN == errno))) + std::this_thread::yield();/* another thread may be able to progress */ + if (res < 0) { + err = errno; + if (clp->in_flags.coe) { + memset(bp, 0, blocks * rep->bs); + pr2serr_lk("[%d] %s : >> substituted zeros for in blk=%" PRId64 + " for %d bytes, %s\n", id, __func__, lba, + blocks * rep->bs, + tsafe_strerror(err, strerr_buff)); + res = blocks * rep->bs; + } else { + pr2serr_lk("[%d] %s: error in normal read, %s\n", id, __func__, + tsafe_strerror(err, strerr_buff)); + return -err; + } + } + rep->in_follow_on += res; + if (res < blocks * rep->bs) { + blocks = res / rep->bs; + if ((res % rep->bs) > 0) { + rep->in_local_partial++; + rep->in_resid_bytes = res % rep->bs; + } + } + return blocks; +} + +/* N.B. Returns 'blocks' is successful, lesser positive number if there was + * a short write, or an error code which is negative. */ +static int +normal_out_wr(Rq_elem * rep, int64_t lba, int blocks, int d_boff) +{ + int res, err; + int id = rep->id; + struct global_collection * clp = rep->clp; + uint8_t * bp = rep->buffp + d_boff; + char strerr_buff[STRERR_BUFF_LEN]; + + if (clp->verbose > 4) + pr2serr_lk("[%d] %s: lba=%" PRIu64 ", blocks=%d, d_boff=%d\n", id, + __func__, lba, blocks, d_boff); + + if (clp->in_type != FT_FIFO) { + int64_t pos = lba * rep->bs; + + if (rep->out_follow_on != pos) { + if (lseek64(rep->outfd, pos, SEEK_SET) < 0) { + err = errno; + pr2serr_lk("[%d] %s: >> lseek64(%" PRId64 "): %s\n", id, + __func__, pos, safe_strerror(err)); + return -err; + } + rep->out_follow_on = pos; + } + } + while (((res = write(rep->outfd, bp, blocks * rep->bs)) + < 0) && ((EINTR == errno) || (EAGAIN == errno))) + std::this_thread::yield();/* another thread may be able to progress */ + if (res < 0) { + err = errno; + if (clp->out_flags.coe) { + pr2serr_lk("[%d] %s: >> ignored error for out lba=%" PRId64 + " for %d bytes, %s\n", id, __func__, lba, + blocks * rep->bs, tsafe_strerror(err, strerr_buff)); + res = blocks * rep->bs; + } + else { + pr2serr_lk("[%d] %s: error normal write, %s\n", id, __func__, + tsafe_strerror(err, strerr_buff)); + return -err; + } + } + rep->out_follow_on += res; + if (res < blocks * rep->bs) { + blocks = res / rep->bs; + if ((res % rep->bs) > 0) { + blocks++; + rep->out_local_partial++; + } + } + return blocks; +} + +static int +extra_out_wr(Rq_elem * rep, int num_bytes, int d_boff) +{ + int res, err; + int id = rep->id; + struct global_collection * clp = rep->clp; + uint8_t * bp = rep->buffp + d_boff; + char strerr_buff[STRERR_BUFF_LEN]; + + if (clp->verbose > 4) + pr2serr_lk("[%d] %s: num_bytes=%d, d_boff=%d\n", id, __func__, + num_bytes, d_boff); + + while (((res = write(clp->out0fd, bp, num_bytes)) + < 0) && ((EINTR == errno) || (EAGAIN == errno))) + std::this_thread::yield();/* another thread may be able to progress */ + if (res < 0) { + err = errno; + pr2serr_lk("[%d] %s: error normal write, %s\n", id, __func__, + tsafe_strerror(err, strerr_buff)); + return -err; + } + if (res > 0) + rep->out_local_partial++; + return res; +} + +static int +sg_build_scsi_cdb(uint8_t * cdbp, int cdb_sz, unsigned int blocks, + int64_t start_block, bool ver_true, bool write_true, + bool fua, bool dpo, int cdl) +{ + bool normal_rw = true; + int rd_opcode[] = {0x8, 0x28, 0xa8, 0x88}; + int ve_opcode[] = {0xff /* no VER(6) */, 0x2f, 0xaf, 0x8f}; + int wr_opcode[] = {0xa, 0x2a, 0xaa, 0x8a}; + int sz_ind; + + memset(cdbp, 0, cdb_sz); + if (ver_true) { /* only support VERIFY(10) */ + if (cdb_sz < 10) { + pr2serr_lk("%s only support VERIFY(10)\n", my_name); + return 1; + } + cdb_sz = 10; + fua = false; + cdbp[1] |= 0x2; /* BYTCHK=1 --> sending dout for comparison */ + cdbp[0] = ve_opcode[1]; + normal_rw = false; + } + 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_lk("%sfor 6 byte commands, maximum number of blocks is " + "256\n", my_name); + return 1; + } + if ((start_block + blocks - 1) & (~0x1fffff)) { + pr2serr_lk("%sfor 6 byte commands, can't address blocks beyond " + "%d\n", my_name, 0x1fffff); + return 1; + } + if (dpo || fua) { + pr2serr_lk("%sfor 6 byte commands, neither dpo nor fua bits " + "supported\n", my_name); + return 1; + } + break; + case 10: + if (! ver_true) { + 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_lk("%sfor 10 byte commands, maximum number of blocks is " + "%d\n", my_name, 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); + if (normal_rw && (cdl > 0)) { + if (cdl & 0x4) + cdbp[1] |= 0x1; + if (cdl & 0x3) + cdbp[14] |= ((cdl & 0x3) << 6); + } + break; + default: + pr2serr_lk("%sexpected cdb size of 6, 10, 12, or 16 but got %d\n", + my_name, cdb_sz); + return 1; + } + return 0; +} + +static int +process_mrq_response(Rq_elem * rep, const struct sg_io_v4 * ctl_v4p, + const struct sg_io_v4 * a_v4p, int num_mrq, + uint32_t & good_inblks, uint32_t & good_outblks, + bool & last_err_on_in) +{ + struct global_collection * clp = rep->clp; + bool ok, all_good; + bool sb_in_co = !!(ctl_v4p->response); + int id = rep->id; + int resid = ctl_v4p->din_resid; + int sres = ctl_v4p->spare_out; + int n_subm = num_mrq - ctl_v4p->dout_resid; + int n_cmpl = ctl_v4p->info; + int n_good = 0; + int hole_count = 0; + int cat = 0; + int vb = clp->verbose; + int k, j, f1, slen; + char b[160]; + + good_inblks = 0; + good_outblks = 0; + if (vb > 2) + pr2serr_lk("[thread_id=%d] %s: num_mrq=%d, n_subm=%d, n_cmpl=%d\n", + id, __func__, num_mrq, n_subm, n_cmpl); + if (n_subm < 0) { + pr2serr_lk("[%d] co.dout_resid(%d) > num_mrq(%d)\n", id, + ctl_v4p->dout_resid, num_mrq); + return -1; + } + if (n_cmpl != (num_mrq - resid)) + pr2serr_lk("[%d] co.info(%d) != (num_mrq(%d) - co.din_resid(%d))\n" + "will use co.info\n", id, n_cmpl, num_mrq, resid); + if (n_cmpl > n_subm) { + pr2serr_lk("[%d] n_cmpl(%d) > n_subm(%d), use n_subm for both\n", + id, n_cmpl, n_subm); + n_cmpl = n_subm; + } + if (sres) { + pr2serr_lk("[%d] secondary error: %s [%d], info=0x%x\n", id, + strerror(sres), sres, ctl_v4p->info); + if (E2BIG == sres) { + sg_take_snap(rep->infd, id, true); + sg_take_snap(rep->outfd, id, true); + } + } + /* Check if those submitted have finished or not. N.B. If there has been + * an error then there may be "holes" (i.e. info=0x0) in the array due + * to completions being out-of-order. */ + for (k = 0, j = 0; ((k < num_mrq) && (j < n_subm)); + ++k, j += f1, ++a_v4p) { + slen = a_v4p->response_len; + if (! (SG_INFO_MRQ_FINI & a_v4p->info)) + ++hole_count; + ok = true; + f1 = !!(a_v4p->info); /* want to skip n_subm count if info is 0x0 */ + if (SG_INFO_CHECK & a_v4p->info) { + if ((0 == k) && (SGV4_FLAG_META_OUT_IF & ctl_v4p->flags) && + (UINT32_MAX == a_v4p->info)) { + hole_count = 0; + n_good = num_mrq; + good_inblks = rep->a_mrq_din_blks; + good_outblks = rep->a_mrq_dout_blks; + break; + } + ok = false; + pr2serr_lk("[%d] a_v4[%d]: SG_INFO_CHECK set [%s]\n", id, k, + sg_info_str(a_v4p->info, sizeof(b), b)); + } + if (sg_scsi_status_is_bad(a_v4p->device_status) || + a_v4p->transport_status || a_v4p->driver_status) { + ok = false; + last_err_on_in = ! (a_v4p->flags & SGV4_FLAG_DO_ON_OTHER); + if (SAM_STAT_CHECK_CONDITION != a_v4p->device_status) { + pr2serr_lk("[%d] a_v4[%d]:\n", id, k); + if (vb) + lk_chk_n_print4(" >>", a_v4p, vb > 4); + } + } + if (slen > 0) { + struct sg_scsi_sense_hdr ssh; + const uint8_t *sbp = (const uint8_t *) + (sb_in_co ? ctl_v4p->response : a_v4p->response); + + if (sg_scsi_normalize_sense(sbp, slen, &ssh) && + (ssh.response_code >= 0x70)) { + if (ssh.response_code & 0x1) { + ok = true; + last_err_on_in = false; + } else + cat = sg_err_category_sense(sbp, slen); + if (SPC_SK_MISCOMPARE == ssh.sense_key) + ++num_miscompare; + + pr2serr_lk("[%d] a_v4[%d]:\n", id, k); + if (vb) + lk_chk_n_print4(" >>", a_v4p, vb > 4); + } + } else if (! ok) + cat = SG_LIB_CAT_OTHER; + if (ok && f1) { + ++n_good; + if (a_v4p->dout_xfer_len >= (uint32_t)rep->bs) + good_outblks += (a_v4p->dout_xfer_len - a_v4p->dout_resid) / + rep->bs; + if (a_v4p->din_xfer_len >= (uint32_t)rep->bs) + good_inblks += (a_v4p->din_xfer_len - a_v4p->din_resid) / + rep->bs; + } + if (! ok) { + if ((a_v4p->dout_xfer_len > 0) || (! clp->in_flags.coe)) + rep->stop_after_write = true; + } + } /* end of request array scan loop */ + if ((n_subm == num_mrq) || (vb < 3)) + goto fini; + pr2serr_lk("[%d] checking response array _beyond_ number of " + "submissions [%d] to num_mrq:\n", id, k); + for (all_good = true; k < num_mrq; ++k, ++a_v4p) { + if (SG_INFO_MRQ_FINI & a_v4p->info) { + pr2serr_lk("[%d] a_v4[%d]: unexpected SG_INFO_MRQ_FINI set [%s]\n", + id, k, sg_info_str(a_v4p->info, sizeof(b), b)); + all_good = false; + } + if (a_v4p->device_status || a_v4p->transport_status || + a_v4p->driver_status) { + pr2serr_lk("[%d] a_v4[%d]:\n", id, k); + lk_chk_n_print4(" ", a_v4p, vb > 4); + all_good = false; + } + } + if (all_good) + pr2serr_lk(" ... all good\n"); +fini: + if (cat > 0) + clp->reason_res.store(cat); + return n_good; +} + +/* Returns number of blocks successfully processed or a negative error + * number. */ +static int +sg_half_segment_mrq0(Rq_elem * rep, scat_gath_iter & sg_it, bool is_wr, + int seg_blks, uint8_t *dp) +{ + int k, res, fd, pack_id_base, id, rflags; + int num, kk, lin_blks, cdbsz, err; + uint32_t q_blks = 0; + struct global_collection * clp = rep->clp; + cdb_arr_t t_cdb {}; + struct sg_io_v4 t_v4 {}; + struct sg_io_v4 * t_v4p = &t_v4; + struct flags_t * flagsp = is_wr ? &clp->out_flags : &clp->in_flags; + int vb = clp->verbose; + + id = rep->id; + pack_id_base = id * PACK_ID_TID_MULTIPLIER; + rflags = 0; + fd = is_wr ? rep->outfd : rep->infd; + if (flagsp->mmap && (rep->outregfd >= 0)) + rflags |= SGV4_FLAG_MMAP_IO; + if (flagsp->dio) + rflags |= SGV4_FLAG_DIRECT_IO; + if (flagsp->qhead) + rflags |= SGV4_FLAG_Q_AT_HEAD; + if (flagsp->qtail) + rflags |= SGV4_FLAG_Q_AT_TAIL; + if (flagsp->polled) + rflags |= SGV4_FLAG_POLLED; + + for (k = 0, num = 0; seg_blks > 0; ++k, seg_blks -= num) { + kk = min<int>(seg_blks, clp->bpt); + lin_blks = sg_it.linear_for_n_blks(kk); + num = lin_blks; + if (num <= 0) { + res = 0; + pr2serr_lk("[%d] %s: unexpected num=%d\n", id, __func__, num); + break; + } + + /* First build the command/request for the read-side */ + cdbsz = is_wr ? clp->cdbsz_out : clp->cdbsz_in; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, sg_it.current_lba(), + false, is_wr, flagsp->fua, flagsp->dpo, + flagsp->cdl); + if (res) { + pr2serr_lk("[%d] %s: sg_build_scsi_cdb() failed\n", id, __func__); + break; + } else if (vb > 3) + lk_print_command_len("cdb: ", t_cdb.data(), cdbsz, true); + + t_v4p->guard = 'Q'; + t_v4p->request = (uint64_t)t_cdb.data(); + t_v4p->usr_ptr = t_v4p->request; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->flags = rflags; + t_v4p->request_len = cdbsz; + if (is_wr) { + t_v4p->dout_xfer_len = num * rep->bs; + t_v4p->dout_xferp = (uint64_t)(dp + (q_blks * rep->bs)); + t_v4p->din_xfer_len = 0; + } else { + t_v4p->din_xfer_len = num * rep->bs; + t_v4p->din_xferp = (uint64_t)(dp + (q_blks * rep->bs)); + t_v4p->dout_xfer_len = 0; + } + t_v4p->timeout = clp->cmd_timeout; + t_v4p->request_extra = pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); +mrq0_again: + res = ioctl(fd, SG_IO, t_v4p); + err = errno; + if (vb > 5) + v4hdr_out_lk("sg_half_segment_mrq0: >> after ioctl(SG_IO)", + t_v4p, id, false); + if (res < 0) { + if (E2BIG == err) + sg_take_snap(fd, id, true); + else if (EBUSY == err) { + ++num_ebusy; + std::this_thread::yield();/* so other threads can progress */ + goto mrq0_again; + } + pr2serr_lk("[%d] %s: ioctl(SG_IO)-->%d, errno=%d: %s\n", id, + __func__, res, err, strerror(err)); + return -err; + } + if (t_v4p->device_status || t_v4p->transport_status || + t_v4p->driver_status) { + rep->stop_now = true; + pr2serr_lk("[%d] t_v4[%d]:\n", id, k); + lk_chk_n_print4(" ", t_v4p, vb > 4); + return q_blks; + } + q_blks += num; + sg_it.add_blks(num); + } + return q_blks; +} + +/* Returns number of blocks successfully processed or a negative error + * number. */ +static int +sg_half_segment(Rq_elem * rep, scat_gath_iter & sg_it, bool is_wr, + int seg_blks, uint8_t *dp, vector<cdb_arr_t> & a_cdb, + vector<struct sg_io_v4> & a_v4) +{ + int num_mrq, k, res, fd, mrq_pack_id_base, id, b_len, rflags; + int num, kk, lin_blks, cdbsz, num_good, err; + int o_seg_blks = seg_blks; + uint32_t in_fin_blks, out_fin_blks; + uint32_t mrq_q_blks = 0; + uint32_t in_mrq_q_blks = 0; + uint32_t out_mrq_q_blks = 0; + const int max_cdb_sz = MAX_SCSI_CDB_SZ; + struct sg_io_v4 * a_v4p; + struct sg_io_v4 ctl_v4 {}; /* MRQ control object */ + struct global_collection * clp = rep->clp; + const char * iosub_str = "SG_IOSUBMIT(variable blocking)"; + char b[80]; + cdb_arr_t t_cdb {}; + struct sg_io_v4 t_v4 {}; + struct sg_io_v4 * t_v4p = &t_v4; + struct flags_t * flagsp = is_wr ? &clp->out_flags : &clp->in_flags; + bool serial = flagsp->serial; + bool err_on_in = false; + int vb = clp->verbose; + + id = rep->id; + b_len = sizeof(b); + if (serial) + iosub_str = "SG_IO(ordered blocking)"; + + a_cdb.clear(); + a_v4.clear(); + rep->a_mrq_din_blks = 0; + rep->a_mrq_dout_blks = 0; + mrq_pack_id_base = id * PACK_ID_TID_MULTIPLIER; + + rflags = 0; + if (flagsp->mmap && (rep->outregfd >= 0)) + rflags |= SGV4_FLAG_MMAP_IO; + if (flagsp->dio) + rflags |= SGV4_FLAG_DIRECT_IO; + if (flagsp->qhead) + rflags |= SGV4_FLAG_Q_AT_HEAD; + if (flagsp->qtail) + rflags |= SGV4_FLAG_Q_AT_TAIL; + if (flagsp->polled) + rflags |= SGV4_FLAG_POLLED; + + for (k = 0, num = 0; seg_blks > 0; ++k, seg_blks -= num) { + kk = min<int>(seg_blks, clp->bpt); + lin_blks = sg_it.linear_for_n_blks(kk); + num = lin_blks; + if (num <= 0) { + res = 0; + pr2serr_lk("[%d] %s: unexpected num=%d\n", id, __func__, num); + break; + } + + /* First build the command/request for the read-side */ + cdbsz = is_wr ? clp->cdbsz_out : clp->cdbsz_in; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, sg_it.current_lba(), + false, is_wr, flagsp->fua, flagsp->dpo, + flagsp->cdl); + if (res) { + pr2serr_lk("[%d] %s: sg_build_scsi_cdb() failed\n", id, __func__); + break; + } else if (vb > 3) + lk_print_command_len("cdb: ", t_cdb.data(), cdbsz, true); + a_cdb.push_back(t_cdb); + + t_v4p->guard = 'Q'; + t_v4p->flags = rflags; + t_v4p->request_len = cdbsz; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->flags = rflags; + t_v4p->usr_ptr = (uint64_t)&a_cdb[a_cdb.size() - 1]; + if (is_wr) { + rep->a_mrq_dout_blks += num; + t_v4p->dout_xfer_len = num * rep->bs; + t_v4p->dout_xferp = (uint64_t)(dp + (mrq_q_blks * rep->bs)); + t_v4p->din_xfer_len = 0; + } else { + rep->a_mrq_din_blks += num; + t_v4p->din_xfer_len = num * rep->bs; + t_v4p->din_xferp = (uint64_t)(dp + (mrq_q_blks * rep->bs)); + t_v4p->dout_xfer_len = 0; + } + t_v4p->timeout = clp->cmd_timeout; + mrq_q_blks += num; + t_v4p->request_extra = mrq_pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); + a_v4.push_back(t_v4); + + sg_it.add_blks(num); + } + + if (rep->only_in_sg) + fd = rep->infd; + else if (rep->only_out_sg) + fd = rep->outfd; + else { + pr2serr_lk("[%d] %s: why am I here? No sg devices\n", id, __func__); + return -EINVAL; + } + num_mrq = a_v4.size(); + a_v4p = a_v4.data(); + res = 0; + ctl_v4.guard = 'Q'; + ctl_v4.request_len = a_cdb.size() * max_cdb_sz; + ctl_v4.request = (uint64_t)a_cdb.data(); + ctl_v4.max_response_len = sizeof(rep->sb); + ctl_v4.response = (uint64_t)rep->sb; + ctl_v4.flags = SGV4_FLAG_MULTIPLE_REQS; + if (! flagsp->coe) + ctl_v4.flags |= SGV4_FLAG_STOP_IF; + if (clp->mrq_polled) + ctl_v4.flags |= SGV4_FLAG_POLLED; + if (clp->in_flags.mout_if || clp->out_flags.mout_if) { + ctl_v4.flags |= SGV4_FLAG_META_OUT_IF; + if (num_mrq > 0) + a_v4[0].info = UINT32_MAX; + } + ctl_v4.dout_xferp = (uint64_t)a_v4.data(); /* request array */ + ctl_v4.dout_xfer_len = a_v4.size() * sizeof(struct sg_io_v4); + ctl_v4.din_xferp = (uint64_t)a_v4.data(); /* response array */ + ctl_v4.din_xfer_len = a_v4.size() * sizeof(struct sg_io_v4); + if (false /* allow_mrq_abort */) { + ctl_v4.request_extra = mrq_pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(ctl_v4.request_extra); + } + + if (vb && vb_first_time.load()) { + pr2serr_lk("First controlling object output by ioctl(%s), flags: " + "%s\n", iosub_str, sg_flags_str(ctl_v4.flags, b_len, b)); + vb_first_time.store(false); + } else if (vb > 4) { + pr2serr_lk("[%d] %s: >> Control object _before_ ioctl(%s):\n", id, + __func__, iosub_str); + } + if (vb > 4) { + if (vb > 5) + hex2stderr_lk((const uint8_t *)&ctl_v4, sizeof(ctl_v4), 1); + v4hdr_out_lk(">> Control object before", &ctl_v4, id, false); + } + +try_again: + if (!after1 && (vb > 1)) { + after1 = true; + pr2serr_lk("%s: %s\n", __func__, serial ? mrq_ob_s : mrq_vb_s); + } + if (serial) + res = ioctl(fd, SG_IO, &ctl_v4); + else + res = ioctl(fd, SG_IOSUBMIT, &ctl_v4); /* overlapping commands */ + if (res < 0) { + err = errno; + if (E2BIG == err) + sg_take_snap(fd, id, true); + else if (EBUSY == err) { + ++num_ebusy; + std::this_thread::yield();/* allow another thread to progress */ + goto try_again; + } + pr2serr_lk("[%d] %s: ioctl(%s, %s)-->%d, errno=%d: %s\n", id, + __func__, iosub_str, sg_flags_str(ctl_v4.flags, b_len, b), + res, err, strerror(err)); + return -err; + } + if (vb > 4) { + pr2serr_lk("%s: >> Control object after ioctl(%s) seg_blks=%d:\n", + __func__, iosub_str, o_seg_blks); + if (vb > 5) + hex2stderr_lk((const uint8_t *)&ctl_v4, sizeof(ctl_v4), 1); + v4hdr_out_lk(">> Control object after", &ctl_v4, id, false); + if (vb > 5) { + for (k = 0; k < num_mrq; ++k) { + if ((vb > 6) || a_v4p[k].info) { + snprintf(b, b_len, "a_v4[%d/%d]", k, num_mrq); + v4hdr_out_lk(b, (a_v4p + k), id, true); + } + } + } + } + num_good = process_mrq_response(rep, &ctl_v4, a_v4p, num_mrq, in_fin_blks, + out_fin_blks, err_on_in); + if (is_wr) + out_mrq_q_blks = mrq_q_blks; + else + in_mrq_q_blks = mrq_q_blks; + if (vb > 2) + pr2serr_lk("%s: >>> seg_blks=%d, num_good=%d, in_q/fin blks=%u/%u; " + "out_q/fin blks=%u/%u\n", __func__, o_seg_blks, num_good, + in_mrq_q_blks, in_fin_blks, out_mrq_q_blks, out_fin_blks); + + if (clp->ese) { + int sres = ctl_v4.spare_out; + + if (sres != 0) { + clp->reason_res.store(sg_convert_errno(sres)); + pr2serr_lk("Exit due to secondary error [%d]\n", sres); + return -sres; + } + } + if (num_good < 0) + return -ENODATA; + else { + if (num_good < num_mrq) { + int resid_blks = in_mrq_q_blks - in_fin_blks; + + if (resid_blks > 0) { + rep->in_rem_count += resid_blks; + rep->stop_after_write = ! (err_on_in && clp->in_flags.coe); + } + + resid_blks = out_mrq_q_blks - out_fin_blks; + if (resid_blks > 0) { + rep->out_rem_count += resid_blks; + rep->stop_after_write = ! (! err_on_in && clp->out_flags.coe); + } + } + } + return is_wr ? out_fin_blks : in_fin_blks; +} + +/* Returns number of blocks successfully processed or a negative error + * number. */ +static int +do_normal_normal_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks) +{ + int k, kk, res, id, num, d_off; + int o_seg_blks = seg_blks; + uint32_t in_fin_blks = 0; + uint32_t out_fin_blks = 0; + struct global_collection * clp = rep->clp; + + id = rep->id; + d_off = 0; + for (k = 0; seg_blks > 0; ++k, seg_blks -= num, d_off += num) { + kk = min<int>(seg_blks, clp->bpt); + num = i_sg_it.linear_for_n_blks(kk); + res = normal_in_rd(rep, i_sg_it.current_lba(), num, + d_off * rep->bs); + if (res < 0) { + pr2serr_lk("[%d] %s: normal in failed d_off=%d, err=%d\n", + id, __func__, d_off, -res); + break; + } + i_sg_it.add_blks(res); + if (res < num) { + d_off += res; + rep->stop_after_write = true; + break; + } + } + seg_blks = d_off; + in_fin_blks = seg_blks; + + if (FT_DEV_NULL == clp->out_type) + goto fini; + d_off = 0; + for (k = 0; seg_blks > 0; ++k, seg_blks -= num, d_off += num) { + kk = min<int>(seg_blks, clp->bpt); + num = o_sg_it.linear_for_n_blks(kk); + res = normal_out_wr(rep, o_sg_it.current_lba(), num, + d_off * rep->bs); + if (res < num) { + if (res < 0) { + pr2serr_lk("[%d] %s: normal out failed d_off=%d, err=%d\n", + id, __func__, d_off, -res); + break; + } + } + o_sg_it.add_blks(res); + if (res < num) { + d_off += res; + rep->stop_after_write = true; + break; + } + } + if (rep->in_resid_bytes > 0) { + res = extra_out_wr(rep, rep->in_resid_bytes, d_off * rep->bs); + if (res < 0) + pr2serr_lk("[%d] %s: extr out failed d_off=%d, err=%d\n", id, + __func__, d_off, -res); + rep->in_resid_bytes = 0; + } + seg_blks = d_off; + out_fin_blks = seg_blks; + +fini: + rep->in_local_count += in_fin_blks; + rep->out_local_count += out_fin_blks; + + if ((in_fin_blks + out_fin_blks) < (uint32_t)o_seg_blks) { + int resid_blks = o_seg_blks - in_fin_blks; + + if (resid_blks > 0) + rep->in_rem_count += resid_blks; + resid_blks = o_seg_blks - out_fin_blks; + if (resid_blks > 0) + rep->out_rem_count += resid_blks; + } + return res < 0 ? res : (min<int>(in_fin_blks, out_fin_blks)); +} + +/* Returns number of blocks successfully processed or a negative error + * number. */ +static int +do_normal_sg_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks, + vector<cdb_arr_t> & a_cdb, + vector<struct sg_io_v4> & a_v4) +{ + bool in_is_normal = ! rep->only_in_sg; + int k, kk, res, id, num, d_off; + int o_seg_blks = seg_blks; + uint32_t in_fin_blks = 0; + uint32_t out_fin_blks = 0; + struct global_collection * clp = rep->clp; + + id = rep->id; + a_cdb.clear(); + a_v4.clear(); + + if (in_is_normal) { /* in: normal --> out : sg */ + d_off = 0; + for (k = 0; seg_blks > 0; ++k, seg_blks -= num, d_off += num) { + kk = min<int>(seg_blks, clp->bpt); + num = i_sg_it.linear_for_n_blks(kk); + res = normal_in_rd(rep, i_sg_it.current_lba(), num, + d_off * rep->bs); + if (res < 0) { + pr2serr_lk("[%d] %s: normal in failed d_off=%d, err=%d\n", + id, __func__, d_off, -res); + break; + } + i_sg_it.add_blks(res); + if (res < num) { + d_off += res; + rep->stop_after_write = true; + break; + } + } + seg_blks = d_off; + in_fin_blks = seg_blks; + + if (rep->in_resid_bytes > 0) { + ++seg_blks; + rep->in_resid_bytes = 0; + } + if (clp->mrq_eq_0) + res = sg_half_segment_mrq0(rep, o_sg_it, true /* is_wr */, + seg_blks, rep->buffp); + else + res = sg_half_segment(rep, o_sg_it, true /* is_wr */, seg_blks, + rep->buffp, a_cdb, a_v4); + if (res < seg_blks) { + if (res < 0) { + pr2serr_lk("[%d] %s: sg out failed d_off=%d, err=%d\n", + id, __func__, d_off, -res); + goto fini; + } + rep->stop_after_write = true; + } + seg_blks = res; + out_fin_blks = seg_blks; + + } else { /* in: sg --> out: normal */ + if (clp->mrq_eq_0) + res = sg_half_segment_mrq0(rep, i_sg_it, false, seg_blks, + rep->buffp); + else + res = sg_half_segment(rep, i_sg_it, false, seg_blks, rep->buffp, + a_cdb, a_v4); + if (res < seg_blks) { + if (res < 0) { + pr2serr_lk("[%d] %s: sg in failed, err=%d\n", id, __func__, + -res); + goto fini; + } + rep->stop_after_write = true; + } + seg_blks = res; + in_fin_blks = seg_blks; + + if (FT_DEV_NULL == clp->out_type) { + out_fin_blks = seg_blks;/* so finish logic doesn't suspect ... */ + goto bypass; + } + d_off = 0; + for (k = 0; seg_blks > 0; ++k, seg_blks -= num, d_off += num) { + kk = min<int>(seg_blks, clp->bpt); + num = o_sg_it.linear_for_n_blks(kk); + res = normal_out_wr(rep, o_sg_it.current_lba(), num, + d_off * rep->bs); + if (res < num) { + if (res < 0) { + pr2serr_lk("[%d] %s: normal out failed d_off=%d, err=%d\n", + id, __func__, d_off, -res); + break; + } + } + o_sg_it.add_blks(res); + if (res < num) { + d_off += res; + rep->stop_after_write = true; + break; + } + } + seg_blks = d_off; + out_fin_blks = seg_blks; + } +bypass: + rep->in_local_count += in_fin_blks; + rep->out_local_count += out_fin_blks; + + if ((in_fin_blks + out_fin_blks) < (uint32_t)o_seg_blks) { + int resid_blks = o_seg_blks - in_fin_blks; + + if (resid_blks > 0) + rep->in_rem_count += resid_blks; + resid_blks = o_seg_blks - out_fin_blks; + if (resid_blks > 0) + rep->out_rem_count += resid_blks; + } +fini: + return res < 0 ? res : (min<int>(in_fin_blks, out_fin_blks)); +} + +/* This function sets up a multiple request (mrq) transaction and sends it + * to the pass-through. Returns number of blocks processed (==seg_blks for + * all good) or a negative error number. */ +static int +do_both_sg_segment_mrq0(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks) +{ + int k, kk, res, pack_id_base, id, iflags, oflags; + int num, i_lin_blks, o_lin_blks, cdbsz, err; + uint32_t in_fin_blks = 0; + uint32_t out_fin_blks = 0; + struct global_collection * clp = rep->clp; + int vb = clp->verbose; + cdb_arr_t t_cdb {}; + struct sg_io_v4 t_v4 {}; + struct sg_io_v4 * t_v4p = &t_v4; + struct flags_t * iflagsp = &clp->in_flags; + struct flags_t * oflagsp = &clp->out_flags; + const char * const a_ioctl_s = "do_both_sg_segment_mrq0: after " + "ioctl(SG_IO)"; + + id = rep->id; + pack_id_base = id * PACK_ID_TID_MULTIPLIER; + + iflags = SGV4_FLAG_SHARE; + if (iflagsp->mmap && (rep->outregfd >= 0)) + iflags |= SGV4_FLAG_MMAP_IO; + else + iflags |= SGV4_FLAG_NO_DXFER; + if (iflagsp->dio) + iflags |= SGV4_FLAG_DIRECT_IO; + if (iflagsp->qhead) + iflags |= SGV4_FLAG_Q_AT_HEAD; + if (iflagsp->qtail) + iflags |= SGV4_FLAG_Q_AT_TAIL; + if (iflagsp->polled) + iflags |= SGV4_FLAG_POLLED; + + oflags = SGV4_FLAG_SHARE | SGV4_FLAG_NO_DXFER; + if (oflagsp->dio) + oflags |= SGV4_FLAG_DIRECT_IO; + if (oflagsp->qhead) + oflags |= SGV4_FLAG_Q_AT_HEAD; + if (oflagsp->qtail) + oflags |= SGV4_FLAG_Q_AT_TAIL; + if (oflagsp->polled) + oflags |= SGV4_FLAG_POLLED; + + for (k = 0; seg_blks > 0; ++k, seg_blks -= num) { + kk = min<int>(seg_blks, clp->bpt); + i_lin_blks = i_sg_it.linear_for_n_blks(kk); + o_lin_blks = o_sg_it.linear_for_n_blks(kk); + num = min<int>(i_lin_blks, o_lin_blks); + if (num <= 0) { + res = 0; + pr2serr_lk("[%d] %s: min(i_lin_blks=%d o_lin_blks=%d) < 1\n", id, + __func__, i_lin_blks, o_lin_blks); + break; + } + + /* First build the command/request for the read-side*/ + cdbsz = clp->cdbsz_in; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, + i_sg_it.current_lba(), false, false, + iflagsp->fua, iflagsp->dpo, iflagsp->cdl); + if (res) { + pr2serr_lk("%s: t=%d: input sg_build_scsi_cdb() failed\n", + __func__, id); + break; + } else if (vb > 3) + lk_print_command_len("input cdb: ", t_cdb.data(), cdbsz, true); + + t_v4p->guard = 'Q'; + t_v4p->request = (uint64_t)t_cdb.data(); + t_v4p->usr_ptr = t_v4p->request; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->flags = iflags; + t_v4p->request_len = cdbsz; + t_v4p->din_xfer_len = num * rep->bs; + t_v4p->dout_xfer_len = 0; + t_v4p->timeout = clp->cmd_timeout; + t_v4p->request_extra = pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); +mrq0_again: + res = ioctl(rep->infd, SG_IO, t_v4p); + err = errno; + if (vb > 5) + v4hdr_out_lk(a_ioctl_s, t_v4p, id, false); + if (res < 0) { + if (E2BIG == err) + sg_take_snap(rep->infd, id, true); + else if (EBUSY == err) { + ++num_ebusy; + std::this_thread::yield();/* so other threads can progress */ + goto mrq0_again; + } + pr2serr_lk("[%d] %s: ioctl(SG_IO, read-side)-->%d, errno=%d: " + "%s\n", id, __func__, res, err, strerror(err)); + return -err; + } + if (t_v4p->device_status || t_v4p->transport_status || + t_v4p->driver_status) { + rep->stop_now = true; + pr2serr_lk("[%d] t_v4[%d]:\n", id, k); + lk_chk_n_print4(" ", t_v4p, vb > 4); + return min<int>(in_fin_blks, out_fin_blks); + } + rep->in_local_count += num; + in_fin_blks += num; + + /* Now build the command/request for write-side (WRITE or VERIFY) */ + cdbsz = clp->cdbsz_out; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, + o_sg_it.current_lba(), clp->verify, true, + oflagsp->fua, oflagsp->dpo, oflagsp->cdl); + if (res) { + pr2serr_lk("%s: t=%d: output sg_build_scsi_cdb() failed\n", + __func__, id); + break; + } else if (vb > 3) + lk_print_command_len("output cdb: ", t_cdb.data(), cdbsz, true); + + t_v4p->guard = 'Q'; + t_v4p->request = (uint64_t)t_cdb.data(); + t_v4p->usr_ptr = t_v4p->request; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->flags = oflags; + t_v4p->request_len = cdbsz; + t_v4p->din_xfer_len = 0; + t_v4p->dout_xfer_len = num * rep->bs; + t_v4p->timeout = clp->cmd_timeout; + t_v4p->request_extra = pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); +mrq0_again2: + res = ioctl(rep->outfd, SG_IO, t_v4p); + err = errno; + if (vb > 5) + v4hdr_out_lk(a_ioctl_s, t_v4p, id, false); + if (res < 0) { + if (E2BIG == err) + sg_take_snap(rep->outfd, id, true); + else if (EBUSY == err) { + ++num_ebusy; + std::this_thread::yield();/* so other threads can progress */ + goto mrq0_again2; + } + pr2serr_lk("[%d] %s: ioctl(SG_IO, write-side)-->%d, errno=%d: " + "%s\n", id, __func__, res, err, strerror(err)); + return -err; + } + if (t_v4p->device_status || t_v4p->transport_status || + t_v4p->driver_status) { + rep->stop_now = true; + pr2serr_lk("[%d] t_v4[%d]:\n", id, k); + lk_chk_n_print4(" ", t_v4p, vb > 4); + return min<int>(in_fin_blks, out_fin_blks); + } + rep->out_local_count += num; + out_fin_blks += num; + + i_sg_it.add_blks(num); + o_sg_it.add_blks(num); + } + return min<int>(in_fin_blks, out_fin_blks); +} + +/* This function sets up a multiple request (mrq) transaction and sends it + * to the pass-through. Returns number of blocks processed (==seg_blks for + * all good) or a negative error number. */ +static int +do_both_sg_segment(Rq_elem * rep, scat_gath_iter & i_sg_it, + scat_gath_iter & o_sg_it, int seg_blks, + vector<cdb_arr_t> & a_cdb, + vector<struct sg_io_v4> & a_v4) +{ + bool err_on_in = false; + int num_mrq, k, res, fd, mrq_pack_id_base, id, b_len, iflags, oflags; + int num, kk, i_lin_blks, o_lin_blks, cdbsz, num_good, err; + int o_seg_blks = seg_blks; + uint32_t in_fin_blks = 0; + uint32_t out_fin_blks = 0;; + uint32_t in_mrq_q_blks = 0; + uint32_t out_mrq_q_blks = 0; + const int max_cdb_sz = MAX_SCSI_CDB_SZ; + struct sg_io_v4 * a_v4p; + struct sg_io_v4 ctl_v4 {}; /* MRQ control object */ + struct global_collection * clp = rep->clp; + const char * iosub_str = "SG_IOSUBMIT(svb)"; + char b[80]; + cdb_arr_t t_cdb {}; + struct sg_io_v4 t_v4 {}; + struct sg_io_v4 * t_v4p = &t_v4; + struct flags_t * iflagsp = &clp->in_flags; + struct flags_t * oflagsp = &clp->out_flags; + int vb = clp->verbose; + + id = rep->id; + b_len = sizeof(b); + + a_cdb.clear(); + a_v4.clear(); + rep->a_mrq_din_blks = 0; + rep->a_mrq_dout_blks = 0; + mrq_pack_id_base = id * PACK_ID_TID_MULTIPLIER; + + iflags = SGV4_FLAG_SHARE; + if (iflagsp->mmap && (rep->outregfd >= 0)) + iflags |= SGV4_FLAG_MMAP_IO; + else + iflags |= SGV4_FLAG_NO_DXFER; + if (iflagsp->dio) + iflags |= SGV4_FLAG_DIRECT_IO; + if (iflagsp->qhead) + iflags |= SGV4_FLAG_Q_AT_HEAD; + if (iflagsp->qtail) + iflags |= SGV4_FLAG_Q_AT_TAIL; + if (iflagsp->polled) + iflags |= SGV4_FLAG_POLLED; + + oflags = SGV4_FLAG_SHARE | SGV4_FLAG_NO_DXFER; + if (oflagsp->dio) + oflags |= SGV4_FLAG_DIRECT_IO; + if (oflagsp->qhead) + oflags |= SGV4_FLAG_Q_AT_HEAD; + if (oflagsp->qtail) + oflags |= SGV4_FLAG_Q_AT_TAIL; + if (oflagsp->polled) + oflags |= SGV4_FLAG_POLLED; + oflags |= SGV4_FLAG_DO_ON_OTHER; + + for (k = 0; seg_blks > 0; ++k, seg_blks -= num) { + kk = min<int>(seg_blks, clp->bpt); + i_lin_blks = i_sg_it.linear_for_n_blks(kk); + o_lin_blks = o_sg_it.linear_for_n_blks(kk); + num = min<int>(i_lin_blks, o_lin_blks); + if (num <= 0) { + res = 0; + pr2serr_lk("[%d] %s: min(i_lin_blks=%d o_lin_blks=%d) < 1\n", id, + __func__, i_lin_blks, o_lin_blks); + break; + } + + /* First build the command/request for the read-side*/ + cdbsz = clp->cdbsz_in; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, + i_sg_it.current_lba(), false, false, + iflagsp->fua, iflagsp->dpo, iflagsp->cdl); + if (res) { + pr2serr_lk("%s: t=%d: input sg_build_scsi_cdb() failed\n", + __func__, id); + break; + } else if (vb > 3) + lk_print_command_len("input cdb: ", t_cdb.data(), cdbsz, true); + a_cdb.push_back(t_cdb); + + t_v4p->guard = 'Q'; + t_v4p->flags = iflags; + t_v4p->request_len = cdbsz; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->usr_ptr = (uint64_t)&a_cdb[a_cdb.size() - 1]; + t_v4p->din_xfer_len = num * rep->bs; + rep->a_mrq_din_blks += num; + t_v4p->dout_xfer_len = 0; + t_v4p->timeout = clp->cmd_timeout; + in_mrq_q_blks += num; + t_v4p->request_extra = mrq_pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); + a_v4.push_back(t_v4); + + /* Now build the command/request for write-side (WRITE or VERIFY) */ + cdbsz = clp->cdbsz_out; + res = sg_build_scsi_cdb(t_cdb.data(), cdbsz, num, + o_sg_it.current_lba(), clp->verify, true, + oflagsp->fua, oflagsp->dpo, oflagsp->cdl); + if (res) { + pr2serr_lk("%s: t=%d: output sg_build_scsi_cdb() failed\n", + __func__, id); + break; + } else if (vb > 3) + lk_print_command_len("output cdb: ", t_cdb.data(), cdbsz, true); + a_cdb.push_back(t_cdb); + t_v4p->guard = 'Q'; + t_v4p->flags = oflags; + t_v4p->request_len = cdbsz; + t_v4p->response = (uint64_t)rep->sb; + t_v4p->max_response_len = sizeof(rep->sb); + t_v4p->usr_ptr = (uint64_t)&a_cdb[a_cdb.size() - 1]; + t_v4p->din_xfer_len = 0; + t_v4p->dout_xfer_len = num * rep->bs; + rep->a_mrq_dout_blks += num; + t_v4p->timeout = clp->cmd_timeout; + out_mrq_q_blks += num; + t_v4p->request_extra = mrq_pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(t_v4p->request_extra); + a_v4.push_back(t_v4); + + i_sg_it.add_blks(num); + o_sg_it.add_blks(num); + } + + if (vb > 6) { + pr2serr_lk("%s: t=%d: a_v4 array contents:\n", __func__, id); + hex2stderr_lk((const uint8_t *)a_v4.data(), + a_v4.size() * sizeof(struct sg_io_v4), 1); + } + if (rep->both_sg || rep->same_sg) + fd = rep->infd; /* assume share to rep->outfd */ + else { + pr2serr_lk("[%d] %s: why am I here? Want 2 sg devices\n", id, + __func__); + res = -1; + goto fini; + } + num_mrq = a_v4.size(); + a_v4p = a_v4.data(); + res = 0; + ctl_v4.guard = 'Q'; + ctl_v4.request_len = a_cdb.size() * max_cdb_sz; + ctl_v4.request = (uint64_t)a_cdb.data(); + ctl_v4.max_response_len = sizeof(rep->sb); + ctl_v4.response = (uint64_t)rep->sb; + ctl_v4.flags = SGV4_FLAG_MULTIPLE_REQS | SGV4_FLAG_SHARE; + if (! (iflagsp->coe || oflagsp->coe)) + ctl_v4.flags |= SGV4_FLAG_STOP_IF; + if ((! clp->verify) && clp->out_flags.order_wr) + ctl_v4.flags |= SGV4_FLAG_ORDERED_WR; + if (clp->mrq_polled) + ctl_v4.flags |= SGV4_FLAG_POLLED; + if (clp->in_flags.mout_if || clp->out_flags.mout_if) { + ctl_v4.flags |= SGV4_FLAG_META_OUT_IF; + if (num_mrq > 0) + a_v4[0].info = UINT32_MAX; + } + ctl_v4.dout_xferp = (uint64_t)a_v4.data(); /* request array */ + ctl_v4.dout_xfer_len = a_v4.size() * sizeof(struct sg_io_v4); + ctl_v4.din_xferp = (uint64_t)a_v4.data(); /* response array */ + ctl_v4.din_xfer_len = a_v4.size() * sizeof(struct sg_io_v4); + if (false /* allow_mrq_abort */) { + ctl_v4.request_extra = mrq_pack_id_base + ++rep->mrq_pack_id_off; + clp->most_recent_pack_id.store(ctl_v4.request_extra); + } + + if (vb && vb_first_time.load()) { + pr2serr_lk("First controlling object output by ioctl(%s), flags: " + "%s\n", iosub_str, sg_flags_str(ctl_v4.flags, b_len, b)); + vb_first_time.store(false); + } else if (vb > 4) + pr2serr_lk("%s: >> Control object _before_ ioctl(%s):\n", __func__, + iosub_str); + if (vb > 4) { + if (vb > 5) + hex2stderr_lk((const uint8_t *)&ctl_v4, sizeof(ctl_v4), 1); + v4hdr_out_lk(">> Control object before", &ctl_v4, id, false); + } + +try_again: + if (!after1 && (vb > 1)) { + after1 = true; + pr2serr_lk("%s: %s\n", __func__, mrq_svb_s); + } + res = ioctl(fd, SG_IOSUBMIT, &ctl_v4); + if (res < 0) { + err = errno; + if (E2BIG == err) + sg_take_snap(fd, id, true); + else if (EBUSY == err) { + ++num_ebusy; + std::this_thread::yield();/* allow another thread to progress */ + goto try_again; + } + pr2serr_lk("%s: ioctl(%s, %s)-->%d, errno=%d: %s\n", __func__, + iosub_str, sg_flags_str(ctl_v4.flags, b_len, b), res, err, + strerror(err)); + res = -err; + goto fini; + } + if (vb > 4) { + pr2serr_lk("%s: >> Control object after ioctl(%s) seg_blks=%d:\n", + __func__, iosub_str, o_seg_blks); + if (vb > 5) + hex2stderr_lk((const uint8_t *)&ctl_v4, sizeof(ctl_v4), 1); + v4hdr_out_lk(">> Control object after", &ctl_v4, id, false); + if (vb > 5) { + for (k = 0; k < num_mrq; ++k) { + if ((vb > 6) || a_v4p[k].info) { + snprintf(b, b_len, "a_v4[%d/%d]", k, num_mrq); + v4hdr_out_lk(b, (a_v4p + k), id, true); + } + } + } + } + num_good = process_mrq_response(rep, &ctl_v4, a_v4p, num_mrq, in_fin_blks, + out_fin_blks, err_on_in); + if (vb > 2) + pr2serr_lk("%s: >>> seg_blks=%d, num_good=%d, in_q/fin blks=%u/%u; " + "out_q/fin blks=%u/%u\n", __func__, o_seg_blks, num_good, + in_mrq_q_blks, in_fin_blks, out_mrq_q_blks, out_fin_blks); + + if (clp->ese) { + int sres = ctl_v4.spare_out; + + if (sres != 0) { + clp->reason_res.store(sg_convert_errno(sres)); + pr2serr_lk("Exit due to secondary error [%d]\n", sres); + return -sres; + } + } + if (num_good < 0) + res = -ENODATA; + else { + rep->in_local_count += in_fin_blks; + rep->out_local_count += out_fin_blks; + + if (num_good < num_mrq) { /* reduced number completed */ + int resid_blks = in_mrq_q_blks - in_fin_blks; + + if (resid_blks > 0) { + rep->in_rem_count += resid_blks; + rep->stop_after_write = ! (err_on_in && clp->in_flags.coe); + } + + resid_blks = out_mrq_q_blks - out_fin_blks; + if (resid_blks > 0) { + rep->out_rem_count += resid_blks; + rep->stop_after_write = ! ((! err_on_in) && + clp->out_flags.coe); + } + } + } +fini: + return res < 0 ? res : (min<int>(in_fin_blks, out_fin_blks)); +} + +#if 0 +/* Returns number found and (partially) processed. 'num' is the number of + * completions to wait for when > 0. When 'num' is zero check all inflight + * request on 'fd' and return quickly if none completed (i.e. don't wait) + * If error return negative errno and if no request inflight or waiting + * then return -9999 . */ +static int +sg_blk_poll(int fd, int num) +{ + int res; + struct sg_extended_info sei {}; + struct sg_extended_info * seip = &sei; + + seip->sei_rd_mask |= SG_SEIM_BLK_POLL; + seip->sei_wr_mask |= SG_SEIM_BLK_POLL; + seip->num = (num < 0) ? 0 : num; + res = ioctl(fd, SG_SET_GET_EXTENDED, seip); + if (res < 0) { + pr2serr_lk("%s: SG_SET_GET_EXTENDED(BLK_POLL) error: %s\n", + __func__, strerror(errno)); + return res; + } + return (seip->num == -1) ? -9999 : seip->num; +} +#endif + +/* 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; +} + +/* Returns the number of times either 'ch1' or 'ch2' is found in + * string 's' given the string's length. */ +int +num_either_ch_in_str(const char * s, int slen, int ch1, int ch2) +{ + int k; + int res = 0; + + while (--slen >= 0) { + k = s[slen]; + if ((ch1 == k) || (ch2 == k)) + ++res; + } + return res; +} + +/* Allocates and then populates a scatter gether list (array) and returns + * it via *sgl_pp. Return of 0 is okay, else error number (in which case + * NULL is written to *sgl_pp) . */ +static int +skip_seek(struct global_collection *clp, const char * key, const char * buf, + bool is_skip, bool ignore_verbose) +{ + bool def_hex = false; + int len; + int vb = clp->verbose; /* needs to appear before skip/seek= on cl */ + int64_t ll; + const char * cp; + class scat_gath_list & either_list = is_skip ? clp->i_sgl : clp->o_sgl; + + if (ignore_verbose) + vb = 0; + len = (int)strlen(buf); + if ((('-' == buf[0]) && (1 == len)) || ((len > 1) && ('@' == buf[0])) || + ((len > 2) && ('H' == toupper(buf[0])) && ('@' == buf[1]))) { + if ('H' == toupper(buf[0])) { + cp = buf + 2; + def_hex = true; + } else if ('-' == buf[0]) + cp = buf; + else + cp = buf + 1; + if (! either_list.load_from_file(cp, def_hex, clp->flexible, true)) { + pr2serr("bad argument to '%s=' [err=%d]\n", key, + either_list.m_errno); + return SG_LIB_SYNTAX_ERROR; + } + } else if (num_either_ch_in_str(buf, len, ',', ' ') > 0) { + if (! either_list.load_from_cli(buf, vb > 0)) { + pr2serr("bad command line argument to '%s='\n", key); + return SG_LIB_SYNTAX_ERROR; + } + } else { /* single number on command line (e.g. skip=1234) */ + ll = sg_get_llnum(buf); + if ((ll < 0) || (ll > MAX_COUNT_SKIP_SEEK)) { + pr2serr("bad argument to '%s='\n", key); + return SG_LIB_SYNTAX_ERROR; + } + either_list.append_1or(0, ll); + if (vb > 1) + pr2serr("%s: singleton, half a degenerate sgl element\n", key); + } + + either_list.sum_scan(key, vb > 3 /* bool show_sgl */, vb > 1); + return 0; +} + +static bool +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 false; + } + cp = buff; + do { + np = strchr(cp, ','); + if (np) + *np++ = '\0'; + if (0 == strcmp(cp, "00")) + fp->zero = true; + else if (0 == strcmp(cp, "append")) + fp->append = true; + else if (0 == strcmp(cp, "coe")) + fp->coe = 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, "ff")) + fp->ff = true; + else if (0 == strcmp(cp, "fua")) + fp->fua = true; + else if (0 == strcmp(cp, "hipri")) + fp->polled = true; + else if (0 == strcmp(cp, "masync")) + fp->masync = true; + else if (0 == strcmp(cp, "mmap")) + ++fp->mmap; /* mmap > 1 stops munmap() being called */ + else if (0 == strcmp(cp, "nocreat")) + fp->nocreat = true; + else if (0 == strcmp(cp, "nodur")) + fp->no_dur = true; + else if (0 == strcmp(cp, "no_dur")) + fp->no_dur = true; + else if (0 == strcmp(cp, "no-dur")) + fp->no_dur = true; + else if (0 == strcmp(cp, "nothresh")) + fp->no_thresh = true; + else if (0 == strcmp(cp, "no_thresh")) + fp->no_thresh = true; + else if (0 == strcmp(cp, "no-thresh")) + fp->no_thresh = true; + else if (0 == strcmp(cp, "noxfer")) + ; /* accept but ignore */ + else if (0 == strcmp(cp, "null")) + ; + else if (0 == strcmp(cp, "ordered")) + fp->order_wr = true; + else if (0 == strcmp(cp, "order")) + fp->order_wr = true; + else if (0 == strcmp(cp, "polled")) + fp->polled = true; + else if (0 == strcmp(cp, "qhead")) + fp->qhead = true; + else if (0 == strcmp(cp, "qtail")) + fp->qtail = true; + else if (0 == strcmp(cp, "random")) + fp->random = true; + else if ((0 == strcmp(cp, "mout_if")) || (0 == strcmp(cp, "mout-if"))) + fp->mout_if = true; + else if ((0 == strcmp(cp, "same_fds")) || + (0 == strcmp(cp, "same-fds"))) + fp->same_fds = true; + else if (0 == strcmp(cp, "serial")) + fp->serial = true; + else if (0 == strcmp(cp, "swait")) + ; /* accept but ignore */ + else if (0 == strcmp(cp, "wq_excl")) + fp->wq_excl = true; + else { + pr2serr("unrecognised flag: %s\n", cp); + return false; + } + cp = np; + } while (cp); + return true; +} + +/* Process arguments given to 'conv=" option. Returns 0 on success, + * 1 on error. */ +static int +process_conv(const char * arg, struct flags_t * ifp, struct flags_t * ofp) +{ + char buff[256]; + char * cp; + char * np; + + strncpy(buff, arg, sizeof(buff)); + buff[sizeof(buff) - 1] = '\0'; + if ('\0' == buff[0]) { + pr2serr("no conversions found\n"); + return 1; + } + cp = buff; + do { + np = strchr(cp, ','); + if (np) + *np++ = '\0'; + if (0 == strcmp(cp, "nocreat")) + ofp->nocreat = true; + else if (0 == strcmp(cp, "noerror")) + ifp->coe = true; /* will still fail on write error */ + else if (0 == strcmp(cp, "notrunc")) + ; /* this is the default action of sg_dd so ignore */ + else if (0 == strcmp(cp, "null")) + ; + else if (0 == strcmp(cp, "sync")) + ; /* dd(susv4): pad errored block(s) with zeros but sg_dd does + * that by default. Typical dd use: 'conv=noerror,sync' */ + else { + pr2serr("unrecognised flag: %s\n", cp); + return 1; + } + cp = np; + } while (cp); + return 0; +} + +#define STR_SZ 1024 +#define INOUTF_SZ 512 + +static int +parse_cmdline_sanity(int argc, char * argv[], struct global_collection * clp, + char * outregf) +{ + bool contra = false; + bool verbose_given = false; + bool version_given = false; + bool verify_given = false; + bool bpt_given = false; + int ibs = 0; + int obs = 0; + int ret = 0; + int k, keylen, n, res; + char str[STR_SZ]; + char * key; + char * buf; + char * skip_buf = NULL; + char * seek_buf = NULL; + const char * cp; + const char * ccp; + + for (k = 1; k < argc; k++) { + if (argv[k]) { + strncpy(str, argv[k], STR_SZ); + str[STR_SZ - 1] = '\0'; + } else + continue; + + for (key = str, buf = key; *buf && *buf != '=';) + buf++; + if (*buf) + *buf++ = '\0'; + keylen = strlen(key); + if (0 == strcmp(key, "bpt")) { + clp->bpt = sg_get_num(buf); + if ((clp->bpt < 0) || (clp->bpt > MAX_BPT_VALUE)) { + pr2serr("%sbad argument to 'bpt='\n", my_name); + goto syn_err; + } + bpt_given = true; + } else if (0 == strcmp(key, "bs")) { + clp->bs = sg_get_num(buf); + if ((clp->bs < 0) || (clp->bs > MAX_BPT_VALUE)) { + pr2serr("%sbad argument to 'bs='\n", my_name); + goto syn_err; + } + } else if (0 == strcmp(key, "cdbsz")) { + ccp = strchr(buf, ','); + n = sg_get_num(buf); + if ((n < 0) || (n > 32)) { + pr2serr("%s: bad argument to 'cdbsz=', expect 6, 10, 12 or " + "16\n", my_name); + goto syn_err; + } + clp->cdbsz_in = n; + if (ccp) { + n = sg_get_num(ccp + 1); + if ((n < 0) || (n > 32)) { + pr2serr("%s: bad second argument to 'cdbsz=', expect 6, " + "10, 12 or 16\n", my_name); + goto syn_err; + } + } + clp->cdbsz_out = n; + clp->cdbsz_given = true; + } else if (0 == strcmp(key, "cdl")) { + ccp = strchr(buf, ','); + n = sg_get_num(buf); + if ((n < 0) || (n > 7)) { + pr2serr("%s: bad argument to 'cdl=', expect 0 to 7\n", + my_name); + goto syn_err; + } + clp->in_flags.cdl = n; + if (ccp) { + n = sg_get_num(ccp + 1); + if ((n < 0) || (n > 7)) { + pr2serr("%s: bad second argument to 'cdl=', expect 0 " + "to 7\n", my_name); + goto syn_err; + } + } + clp->out_flags.cdl = n; + clp->cdl_given = true; + } else if (0 == strcmp(key, "coe")) { + /* not documented, for compat with sgh_dd */ + clp->in_flags.coe = !! sg_get_num(buf); + clp->out_flags.coe = clp->in_flags.coe; + } else if (0 == strcmp(key, "conv")) { + if (process_conv(buf, &clp->in_flags, &clp->out_flags)) { + pr2serr("%s: bad argument to 'conv='\n", my_name); + goto syn_err; + } + } else if (0 == strcmp(key, "count")) { + if (clp->count_given) { + pr2serr("second 'count=' argument detected, only one " + "please\n"); + contra = true; + goto syn_err; + } + if (0 != strcmp("-1", buf)) { + clp->dd_count = sg_get_llnum(buf); + if ((clp->dd_count < 0) || + (clp->dd_count > MAX_COUNT_SKIP_SEEK)) { + pr2serr("%sbad argument to 'count='\n", my_name); + goto syn_err; + } + } /* treat 'count=-1' as calculate count (same as not given) */ + clp->count_given = true; + } else if (0 == strcmp(key, "dio")) { + clp->in_flags.dio = !! sg_get_num(buf); + clp->out_flags.dio = clp->in_flags.dio; + } else if (0 == strcmp(key, "elemsz_kb")) { + n = sg_get_num(buf); + if ((n < 1) || (n > (MAX_BPT_VALUE / 1024))) { + pr2serr("elemsz_kb=EKB wants an integer > 0\n"); + goto syn_err; + } + if (n & (n - 1)) { + pr2serr("elemsz_kb=EKB wants EKB to be power of 2\n"); + goto syn_err; + } + clp->elem_sz = n * 1024; + } else if (0 == strcmp(key, "ese")) { + n = sg_get_num(buf); + if (n < 0) { + pr2serr("ese= wants 0 (default) or 1\n"); + goto syn_err; + } + clp->ese = !!n; + } else if (0 == strcmp(key, "fua")) { + n = sg_get_num(buf); + if (n & 1) + clp->out_flags.fua = true; + if (n & 2) + clp->in_flags.fua = true; + } else if (0 == strcmp(key, "ibs")) { + ibs = sg_get_num(buf); + if ((ibs < 0) || (ibs > MAX_BPT_VALUE)) { + pr2serr("%sbad argument to 'ibs='\n", my_name); + goto syn_err; + } + } else if (0 == strcmp(key, "if")) { + if (clp->inf_v.size() > 0) { + pr2serr("Second 'if=' argument??\n"); + goto syn_err; + } else { + cp = buf; + while ((ccp = strchr(cp, ','))) { + clp->inf_v.push_back(string(cp , ccp - cp)); + cp = ccp + 1; + } + clp->inf_v.push_back(string(cp , strlen(cp))); + } + } else if (0 == strcmp(key, "iflag")) { + if (! process_flags(buf, &clp->in_flags)) { + pr2serr("%sbad argument to 'iflag='\n", my_name); + goto syn_err; + } + } else if ((0 == strcmp(key, "hipri")) || + (0 == strcmp(key, "mrq")) || + (0 == strcmp(key, "polled"))) { + if (isdigit(buf[0])) + cp = buf; + else { + pr2serr("%sonly mrq=NRQS or polled=NRQS which is a number " + "allowed here\n", my_name); + goto syn_err; + } + clp->mrq_num = sg_get_num(cp); + if (clp->mrq_num < 0) { + pr2serr("%sbad argument to 'mrq='\n", my_name); + goto syn_err; + } + if (0 == clp->mrq_num) { + clp->mrq_eq_0 = true; + clp->mrq_num = 1; + pr2serr("note: send single, non-mrq commands\n"); + } + if ('m' != key[0]) + clp->mrq_polled = true; + } else if ((0 == strcmp(key, "no_waitq")) || + (0 == strcmp(key, "no-waitq"))) { + n = sg_get_num(buf); + if (-1 == n) { + pr2serr("%sbad argument to 'no_waitq=', expect 0 or 1\n", + my_name); + goto syn_err; + } + clp->in_flags.no_waitq = true; + clp->out_flags.no_waitq = true; + } else if (0 == strcmp(key, "obs")) { + obs = sg_get_num(buf); + if ((obs < 0) || (obs > MAX_BPT_VALUE)) { + pr2serr("%sbad argument to 'obs='\n", my_name); + goto syn_err; + } + } else if (strcmp(key, "ofreg") == 0) { + if ('\0' != outregf[0]) { + pr2serr("Second OFREG argument??\n"); + contra = true; + goto syn_err; + } else { + memcpy(outregf, buf, INOUTF_SZ); + outregf[INOUTF_SZ - 1] = '\0'; /* noisy compiler */ + } + } else if (strcmp(key, "of") == 0) { + if (clp->outf_v.size() > 0) { + pr2serr("Second 'of=' argument??\n"); + goto syn_err; + } else { + cp = buf; + while ((ccp = strchr(cp, ','))) { + clp->outf_v.push_back(string(cp , ccp - cp)); + cp = ccp + 1; + } + clp->outf_v.push_back(string(cp , strlen(cp))); + } + } else if (0 == strcmp(key, "oflag")) { + if (! process_flags(buf, &clp->out_flags)) { + pr2serr("%sbad argument to 'oflag='\n", my_name); + goto syn_err; + } + } else if (0 == strcmp(key, "sdt")) { + ccp = strchr(buf, ','); + n = sg_get_num(buf); + if (n < 0) { + pr2serr("%sbad argument to 'sdt=CRT[,ICT]'\n", my_name); + goto syn_err; + } + clp->sdt_crt = n; + if (ccp) { + n = sg_get_num(ccp + 1); + if (n < 0) { + pr2serr("%sbad 2nd argument to 'sdt=CRT,ICT'\n", + my_name); + goto syn_err; + } + clp->sdt_ict = n; + } + } else if (0 == strcmp(key, "seek")) { + n = strlen(buf); + if (n < 1) { + pr2serr("%sneed argument to 'seek='\n", my_name); + goto syn_err; + } + seek_buf = (char *)calloc(n + 16, 1); + if (NULL == seek_buf) + goto syn_err; + memcpy(seek_buf, buf, n + 1); + } else if (0 == strcmp(key, "skip")) { + n = strlen(buf); + if (n < 1) { + pr2serr("%sneed argument to 'skip='\n", my_name); + goto syn_err; + } + skip_buf = (char *)calloc(n + 16, 1); + if (NULL == skip_buf) + goto syn_err; + memcpy(skip_buf, buf, n + 1); + } else if (0 == strcmp(key, "sync")) + do_sync = !! sg_get_num(buf); + else if (0 == strcmp(key, "thr")) { + num_threads = sg_get_num(buf); + if ((num_threads < 0) || (num_threads > MAX_BPT_VALUE)) { + pr2serr("%sneed argument to 'skip='\n", my_name); + goto syn_err; + } + } else if (0 == strcmp(key, "time")) { + ccp = strchr(buf, ','); + do_time = sg_get_num(buf); + if (do_time < 0) { + pr2serr("%sbad argument to 'time=0|1|2'\n", my_name); + goto syn_err; + } + if (ccp) { + n = sg_get_num(ccp + 1); + if ((n < 0) || (n > (MAX_BPT_VALUE / 1000))) { + pr2serr("%sbad argument to 'time=0|1|2,TO'\n", my_name); + goto syn_err; + } + clp->cmd_timeout = n ? (n * 1000) : DEF_TIMEOUT; + } + } else if (0 == strncmp(key, "verb", 4)) + clp->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'); + clp->dry_run += n; + res += n; + n = num_chs_in_str(key + 1, keylen - 1, 'h'); + clp->help += n; + res += n; + n = num_chs_in_str(key + 1, keylen - 1, 'p'); + if (n > 0) + clp->prefetch = true; + res += n; + n = num_chs_in_str(key + 1, keylen - 1, 'v'); + if (n > 0) + verbose_given = true; + clp->verbose += n; /* -v ---> --verbose */ + res += n; + n = num_chs_in_str(key + 1, keylen - 1, 'V'); + if (n > 0) + version_given = true; + res += n; + n = num_chs_in_str(key + 1, keylen - 1, 'x'); + if (n > 0) + verify_given = true; + res += n; + + if (res < (keylen - 1)) { + pr2serr("Unrecognised short option in '%s', try '--help'\n", + key); + goto syn_err; + } + } else if ((0 == strncmp(key, "--dry-run", 9)) || + (0 == strncmp(key, "--dry_run", 9))) + ++clp->dry_run; + else if ((0 == strncmp(key, "--help", 6)) || + (0 == strcmp(key, "-?"))) + ++clp->help; + else if ((0 == strncmp(key, "--prefetch", 10)) || + (0 == strncmp(key, "--pre-fetch", 11))) + clp->prefetch = true; + else if (0 == strncmp(key, "--verb", 6)) { + verbose_given = true; + ++clp->verbose; /* --verbose */ + } else if (0 == strncmp(key, "--veri", 6)) + verify_given = true; + else if (0 == strncmp(key, "--vers", 6)) + version_given = true; + else { + pr2serr("Unrecognized option '%s'\n", key); + pr2serr("For more information use '--help'\n"); + goto syn_err; + } + } /* end of parsing for loop */ + + if (skip_buf) { + res = skip_seek(clp, "skip", skip_buf, true /* skip */, false); + free(skip_buf); + skip_buf = NULL; + if (res) { + pr2serr("%sbad argument to 'seek='\n", my_name); + goto syn_err; + } + } + if (seek_buf) { + res = skip_seek(clp, "seek", seek_buf, false /* skip */, false); + free(seek_buf); + seek_buf = NULL; + if (res) { + pr2serr("%sbad argument to 'seek='\n", my_name); + goto syn_err; + } + } + /* heap usage should be all freed up now */ + +#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; + clp->verbose = 0; + } else if (! verbose_given) { + pr2serr("set '-vv'\n"); + clp->verbose = 2; + } else + pr2serr("keep verbose=%d\n", clp->verbose); +#else + if (verbose_given && version_given) + pr2serr("Not in DEBUG mode, so '-vV' has no special action\n"); +#endif + if (version_given) { + pr2serr("%s%s\n", my_name, version_str); + ret = SG_LIB_OK_FALSE; + goto oth_err; + } + if (clp->help > 0) { + usage(clp->help); + ret = SG_LIB_OK_FALSE; + goto oth_err; + } + if (clp->bs <= 0) { + clp->bs = DEF_BLOCK_SIZE; + pr2serr("Assume default 'bs' ((logical) block size) of %d bytes\n", + clp->bs); + } + if (verify_given) { + pr2serr("Doing verify/cmp rather than copy\n"); + clp->verify = true; + } + if ((ibs && (ibs != clp->bs)) || (obs && (obs != clp->bs))) { + pr2serr("If 'ibs' or 'obs' given must be same as 'bs'\n"); + usage(0); + goto syn_err; + } + if (clp->out_flags.append) { + if ((clp->o_sgl.lowest_lba > 0) || + (clp->o_sgl.linearity != SGL_LINEAR)) { + pr2serr("Can't use both append and seek switches\n"); + goto syn_err; + } + if (verify_given) { + pr2serr("Can't use both append and verify switches\n"); + goto syn_err; + } + } + if (clp->bpt < 1) { + pr2serr("bpt must be greater than 0\n"); + goto syn_err; + } + if (clp->in_flags.mmap && clp->out_flags.mmap) { + pr2serr("mmap flag on both IFILE and OFILE doesn't work\n"); + goto syn_err; + } + /* 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 ((clp->bs >= 2048) && (! bpt_given)) + clp->bpt = DEF_BLOCKS_PER_2048TRANSFER; + if (clp->in_flags.order_wr && (! clp->out_flags.order_wr)) + pr2serr("Warning iflag=order is ignored, use with oflag=\n"); + if ((num_threads < 1) || (num_threads > MAX_NUM_THREADS)) { + pr2serr("too few or too many threads requested\n"); + usage(1); + goto syn_err; + } + clp->unit_nanosec = (do_time > 1) || !!getenv("SG3_UTILS_LINUX_NANO"); + return 0; + +syn_err: + if (seek_buf) + free(seek_buf); + if (skip_buf) + free(skip_buf); + return contra ? SG_LIB_CONTRADICT : SG_LIB_SYNTAX_ERROR; +oth_err: + if (seek_buf) + free(seek_buf); + if (skip_buf) + free(skip_buf); + return ret; +} + +static int +calc_count(struct global_collection * clp, const char * inf, + int64_t & in_num_sect, const char * outf, int64_t & out_num_sect) +{ + int in_sect_sz, out_sect_sz, res; + + if (clp->dd_count < 0) { + in_num_sect = -1; + out_num_sect = -1; + } + if (FT_SG == clp->in_type) { + res = scsi_read_capacity(clp->in0fd, &in_num_sect, &in_sect_sz); + if (2 == res) { + pr2serr("Unit attention, media changed(in), continuing\n"); + res = scsi_read_capacity(clp->in0fd, &in_num_sect, + &in_sect_sz); + } + if (0 != res) { + if (res == SG_LIB_CAT_INVALID_OP) + pr2serr("read capacity not supported on %s\n", inf); + else if (res == SG_LIB_CAT_NOT_READY) + pr2serr("read capacity failed, %s not ready\n", inf); + else + pr2serr("Unable to read capacity on %s\n", inf); + return SG_LIB_FILE_ERROR; + } else if (clp->bs != in_sect_sz) { + pr2serr(">> warning: logical block size on %s confusion: " + "bs=%d, device claims=%d\n", clp->infp, clp->bs, + in_sect_sz); + return SG_LIB_FILE_ERROR; + } + } + if (FT_SG == clp->out_type) { + res = scsi_read_capacity(clp->out0fd, &out_num_sect, &out_sect_sz); + if (2 == res) { + pr2serr("Unit attention, media changed(out), continuing\n"); + res = scsi_read_capacity(clp->out0fd, &out_num_sect, + &out_sect_sz); + } + if (0 != res) { + if (res == SG_LIB_CAT_INVALID_OP) + pr2serr("read capacity not supported on %s\n", outf); + else if (res == SG_LIB_CAT_NOT_READY) + pr2serr("read capacity failed, %s not ready\n", outf); + else + pr2serr("Unable to read capacity on %s\n", outf); + out_num_sect = -1; + return SG_LIB_FILE_ERROR; + } else if (clp->bs != out_sect_sz) { + pr2serr(">> warning: logical block size on %s confusion: " + "bs=%d, device claims=%d\n", clp->outfp, clp->bs, + out_sect_sz); + return SG_LIB_FILE_ERROR; + } + } + + if (clp->dd_count < 0) { + if (FT_SG == clp->in_type) + ; + else if (FT_BLOCK == clp->in_type) { + if (0 != read_blkdev_capacity(clp->in0fd, &in_num_sect, + &in_sect_sz)) { + pr2serr("Unable to read block capacity on %s\n", inf); + in_num_sect = -1; + } + if (clp->bs != in_sect_sz) { + pr2serr("logical block size on %s confusion; bs=%d, from " + "device=%d\n", inf, clp->bs, in_sect_sz); + in_num_sect = -1; + } + } + + if (FT_SG == clp->out_type) + ; + else if (FT_BLOCK == clp->out_type) { + if (0 != read_blkdev_capacity(clp->out0fd, &out_num_sect, + &out_sect_sz)) { + pr2serr("Unable to read block capacity on %s\n", outf); + out_num_sect = -1; + } + if (clp->bs != out_sect_sz) { + pr2serr("logical block size on %s confusion: bs=%d, from " + "device=%d\n", outf, clp->bs, out_sect_sz); + out_num_sect = -1; + } + } + } + return 0; +} + +static int +do_count_work(struct global_collection * clp, const char * inf, + int64_t & in_num_sect, const char * outf, + int64_t & out_num_sect) +{ + int res; + class scat_gath_list * isglp = &clp->i_sgl; + class scat_gath_list * osglp = &clp->o_sgl; + + res = calc_count(clp, inf, in_num_sect, outf, out_num_sect); + if (res) + return res; + + if ((-1 == in_num_sect) && (FT_OTHER == clp->in_type)) { + in_num_sect = clp->in_st_size / clp->bs; + if (clp->in_st_size % clp->bs) { + ++in_num_sect; + pr2serr("Warning: the file size of %s is not a multiple of BS " + "[%d]\n", inf, clp->bs); + } + } + if ((in_num_sect > 0) && (isglp->high_lba_p1 > in_num_sect)) { + pr2serr("%shighest LBA [0x%" PRIx64 "] exceeds input length: %" + PRIx64 " blocks\n", my_name, isglp->high_lba_p1 - 1, + in_num_sect); + return SG_LIB_CAT_OTHER; + } + if ((out_num_sect > 0) && (osglp->high_lba_p1 > out_num_sect)) { + pr2serr("%shighest LBA [0x%" PRIx64 "] exceeds output length: %" + PRIx64 " blocks\n", my_name, osglp->high_lba_p1 - 1, + out_num_sect); + return SG_LIB_CAT_OTHER; + } + + if (isglp->sum_hard || osglp->sum_hard) { + int64_t ccount; + + if (isglp->sum_hard && osglp->sum_hard) { + if (isglp->sum != osglp->sum) { + pr2serr("%stwo hard sgl_s, sum of blocks differ: in=%" PRId64 + ", out=%" PRId64 "\n", my_name , isglp->sum, + osglp->sum); + return SG_LIB_CAT_OTHER; + } + ccount = isglp->sum; + } else if (isglp->sum_hard) { + if (osglp->sum > isglp->sum) { + pr2serr("%soutput sgl already too many blocks [%" PRId64 + "]\n", my_name, osglp->sum); + return SG_LIB_CAT_OTHER; + } + if (osglp->linearity != SGL_NON_MONOTONIC) + osglp->append_1or(isglp->sum - osglp->sum); + else { + pr2serr("%soutput sgl non-montonic: can't extend\n", + my_name); + return SG_LIB_CAT_OTHER; + } + ccount = isglp->sum; + } else { /* only osglp hard */ + if (isglp->sum > osglp->sum) { + pr2serr("%sinput sgl already too many blocks [%" PRId64 + "]\n", my_name, isglp->sum); + return SG_LIB_CAT_OTHER; + } + if (isglp->linearity != SGL_NON_MONOTONIC) + isglp->append_1or(osglp->sum - isglp->sum); + else { + pr2serr("%sinput sgl non-monotonic: can't extend\n", + my_name); + return SG_LIB_CAT_OTHER; + } + ccount = osglp->sum; + } + if (SG_COUNT_INDEFINITE == clp->dd_count) + clp->dd_count = ccount; + else if (ccount != clp->dd_count) { + pr2serr("%scount=COUNT disagrees with scatter gather list " + "length [%" PRId64 "]\n", my_name, ccount); + return SG_LIB_CAT_OTHER; + } + } else if (clp->dd_count != 0) { /* and both input and output are soft */ + int64_t iposs = INT64_MAX; + int64_t oposs = INT64_MAX; + + if (clp->dd_count > 0) { + if (isglp->sum > clp->dd_count) { + pr2serr("%sskip sgl sum [%" PRId64 "] exceeds COUNT\n", + my_name, isglp->sum); + return SG_LIB_CAT_OTHER; + } + if (osglp->sum > clp->dd_count) { + pr2serr("%sseek sgl sum [%" PRId64 "] exceeds COUNT\n", + my_name, osglp->sum); + return SG_LIB_CAT_OTHER; + } + goto fini; + } + + /* clp->dd_count == SG_COUNT_INDEFINITE */ + if (in_num_sect > 0) + iposs = in_num_sect + isglp->sum - isglp->high_lba_p1; + if (out_num_sect > 0) + oposs = out_num_sect + osglp->sum - osglp->high_lba_p1; + clp->dd_count = iposs < oposs ? iposs : oposs; + if (INT64_MAX == clp->dd_count) { + pr2serr("%scan't deduce count=COUNT, please supply one\n", + my_name); + return SG_LIB_CAT_OTHER; + } + if (isglp->sum > clp->dd_count) { + pr2serr("%sdeduced COUNT [%" PRId64 "] exceeds skip sgl sum\n", + my_name, clp->dd_count); + return SG_LIB_CAT_OTHER; + } + if (osglp->sum > clp->dd_count) { + pr2serr("%sdeduced COUNT [%" PRId64 "] exceeds seek sgl sum\n", + my_name, clp->dd_count); + return SG_LIB_CAT_OTHER; + } + } + if (clp->dd_count == 0) + return 0; +fini: + if (clp->dd_count > isglp->sum) + isglp->append_1or(clp->dd_count - isglp->sum); + if (clp->dd_count > osglp->sum) + osglp->append_1or(clp->dd_count - osglp->sum); + return 0; +} + + +int +main(int argc, char * argv[]) +{ + bool fail_after_cli = false; + bool ifile_given = true; + // char inf[INOUTF_SZ]; + // char outf[INOUTF_SZ]; + char outregf[INOUTF_SZ]; + int res, k, err; + size_t num_ifiles, num_ofiles, num_slices, inf0_sz; + int64_t in_num_sect = -1; + int64_t out_num_sect = -1; + const char * ccp = NULL; + const char * cc2p; + struct global_collection * clp = &gcoll; + thread sig_listen_thr; + vector<thread> work_thr_v; + vector<thread> listen_thr_v; + char ebuff[EBUFF_SZ]; +#if 0 /* SG_LIB_ANDROID */ + struct sigaction actions; + + memset(&actions, 0, sizeof(actions)); + sigemptyset(&actions.sa_mask); + actions.sa_flags = 0; + actions.sa_handler = thread_exit_handler; + sigaction(SIGUSR1, &actions, NULL); + sigaction(SIGUSR2, &actions, NULL); +#endif + /* memset(clp, 0, sizeof(*clp)); */ + clp->dd_count = SG_COUNT_INDEFINITE; + clp->bpt = DEF_BLOCKS_PER_TRANSFER; + clp->cmd_timeout = DEF_TIMEOUT; + clp->sdt_ict = DEF_SDT_ICT_MS; + clp->sdt_crt = DEF_SDT_CRT_SEC; + clp->in_type = FT_FIFO; + /* change dd's default: if of=OFILE not given, assume /dev/null */ + clp->out_type = FT_DEV_NULL; + clp->cdbsz_in = DEF_SCSI_CDB_SZ; + clp->cdbsz_out = DEF_SCSI_CDB_SZ; + clp->mrq_num = DEF_MRQ_NUM; + // inf[0] = '\0'; + // outf[0] = '\0'; + outregf[0] = '\0'; + fetch_sg_version(); + if (sg_version >= 40045) + sg_version_ge_40045 = true; + else { + pr2serr(">>> %srequires an sg driver version of 4.0.45 or later\n\n", + my_name); + fail_after_cli = true; + } + + res = parse_cmdline_sanity(argc, argv, clp, outregf); + if (SG_LIB_OK_FALSE == res) + return 0; + if (res) + return res; + if (fail_after_cli) { + pr2serr("%scommand line parsing was okay but sg driver is too old\n", + my_name); + return SG_LIB_SYNTAX_ERROR; + } + + install_handler(SIGINT, interrupt_handler); + install_handler(SIGQUIT, interrupt_handler); + install_handler(SIGPIPE, interrupt_handler); + install_handler(SIGUSR1, siginfo_handler); + install_handler(SIGUSR2, siginfo2_handler); + + num_ifiles = clp->inf_v.size(); + num_ofiles = clp->outf_v.size(); + if (num_ifiles > MAX_SLICES) { + pr2serr("%sonly support %d slices but given %zd IFILEs\n", my_name, + MAX_SLICES, num_ifiles); + return SG_LIB_SYNTAX_ERROR; + } + if (num_ofiles > MAX_SLICES) { + pr2serr("%sonly support %d slices but given %zd OFILEs\n", my_name, + MAX_SLICES, num_ifiles); + return SG_LIB_SYNTAX_ERROR; + } + if (0 == num_ofiles) { + if (0 == num_ifiles) { + pr2serr("%sexpect either if= or of= to be given\n", my_name); + return SG_LIB_SYNTAX_ERROR; + } + for (k = 0; k < (int)num_ifiles; ++k) + clp->outf_v.push_back("."); /* same as /dev/null */ + } + if (0 == num_ifiles) { + ifile_given = false; + for (k = 0; k < (int)num_ofiles; ++k) + clp->inf_v.push_back(""); + } + if ((num_ifiles > 1) && (num_ofiles > 1) && (num_ifiles != num_ofiles)) { + pr2serr("%snumber of IFILEs [%zd] and number of OFILEs [%zd] > 1 " + "and unequal\n", my_name, num_ifiles, num_ofiles); + return SG_LIB_SYNTAX_ERROR; + } + if ((num_ifiles > 1) && (1 == num_ofiles)) { + /* if many IFILEs and one OFILE, replicate OFILE till same size */ + for (k = 1; k < (int)num_ifiles; ++k) + clp->outf_v.push_back(clp->outf_v[0]); + num_ofiles = clp->outf_v.size(); + } else if ((num_ofiles > 1) && (1 == num_ifiles)) { + /* if many OFILEs and one IFILE, replicate IFILE till same size */ + for (k = 1; k < (int)num_ofiles; ++k) + clp->inf_v.push_back(clp->inf_v[0]); + num_ifiles = clp->inf_v.size(); + } + num_slices = (num_ifiles > num_ofiles) ? num_ifiles : num_ofiles; + if ((int)num_slices > num_threads) { + pr2serr("%sNumber of slices [%zd] exceeds number of threads [%d].\n", + my_name, num_slices, num_threads); + pr2serr("Number of threads needs to be increased.\n"); + return SG_LIB_SYNTAX_ERROR; + } + k = 0; + for (auto && cvp : clp->cp_ver_arr) { + if (k >= (int)num_slices) + break; + cvp.my_index = k++; + cvp.state = cp_ver_pair_t::my_state::init; + } + clp->in0fd = STDIN_FILENO; + clp->out0fd = STDOUT_FILENO; + if (clp->in_flags.ff && clp->in_flags.zero) { + ccp = "<addr_as_data>"; + cc2p = "addr_as_data"; + } else if (clp->in_flags.ff) { + ccp = "<0xff bytes>"; + cc2p = "ff"; + } else if (clp->in_flags.random) { + ccp = "<random>"; + cc2p = "random"; + } else if (clp->in_flags.zero) { + ccp = "<zero bytes>"; + cc2p = "00"; + } + inf0_sz = clp->inf_v.size() ? clp->inf_v[0].size() : 0; + if (ccp) { + if (ifile_given) { + pr2serr("%siflag=%s and if=%s contradict\n", my_name, cc2p, + clp->inf_v[0].c_str()); + return SG_LIB_CONTRADICT; + } + for (auto && cvp : clp->cp_ver_arr) { + if (cvp.state == cp_ver_pair_t::my_state::empty) + break; + cvp.in_type = FT_RANDOM_0_FF; + } + clp->in_type = FT_RANDOM_0_FF; + clp->infp = ccp; + clp->in0fd = -1; + } else if (inf0_sz && ('-' != clp->inf_v[0].c_str()[0])) { + const string & inf_s = clp->inf_v[0]; + const char * infp = inf_s.c_str(); + + clp->in_type = dd_filetype(infp, clp->in_st_size); + if (FT_ERROR == clp->in_type) { + pr2serr("%sunable to access %s\n", my_name, infp); + return SG_LIB_FILE_ERROR; + } else if (FT_ST == clp->in_type) { + pr2serr("%sunable to use scsi tape device %s\n", my_name, infp); + return SG_LIB_FILE_ERROR; + } else if (FT_CHAR == clp->in_type) { + pr2serr("%sunable to use unknown char device %s\n", my_name, infp); + return SG_LIB_FILE_ERROR; + } else if (FT_SG == clp->in_type) { + clp->in0fd = sg_in_open(clp, inf_s, NULL, NULL); + if (clp->in0fd < 0) + return -clp->in0fd; + } else { + clp->in0fd = reg_file_open(clp, infp, false /* read */); + if (clp->in0fd < 0) + return sg_convert_errno(-clp->in0fd); + } + clp->infp = infp; + } + if (clp->cdl_given && (! clp->cdbsz_given)) { + bool changed = false; + + if ((clp->cdbsz_in < 16) && (clp->in_flags.cdl > 0)) { + clp->cdbsz_in = 16; + changed = true; + } + if ((clp->cdbsz_out < 16) && (! clp->verify) && + (clp->out_flags.cdl > 0)) { + clp->cdbsz_out = 16; + changed = true; + } + if (changed) + pr2serr(">> increasing cdbsz to 16 due to cdl > 0\n"); + } + if ((clp->verbose > 0) && + (clp->in_flags.no_waitq || clp->out_flags.no_waitq)) + pr2serr("no_waitq=<n> operand is now ignored\n"); + if (clp->outf_v.size()) { + const string & outf_s = clp->outf_v[0].c_str(); + const char * outfp = outf_s.c_str(); + + clp->ofile_given = true; + if ('-' == outfp[0]) + clp->out_type = FT_FIFO; + else + clp->out_type = dd_filetype(outfp, clp->out_st_size); + + if ((FT_SG != clp->out_type) && clp->verify) { + pr2serr("%s --verify only supported by sg OFILEs\n", my_name); + return SG_LIB_FILE_ERROR; + } + if (FT_FIFO == clp->out_type) + ; + else if (FT_ST == clp->out_type) { + pr2serr("%sunable to use scsi tape device %s\n", my_name, outfp); + return SG_LIB_FILE_ERROR; + } else if (FT_CHAR == clp->out_type) { + pr2serr("%sunable to use unknown char device %s\n", my_name, + outfp); + return SG_LIB_FILE_ERROR; + } else if (FT_SG == clp->out_type) { + clp->out0fd = sg_out_open(clp, outf_s, NULL, NULL); + if (clp->out0fd < 0) + return -clp->out0fd; + } else if (FT_DEV_NULL == clp->out_type) + clp->out0fd = -1; /* don't bother opening */ + else { + clp->out0fd = reg_file_open(clp, outfp, true /* write */); + if (clp->out0fd < 0) + return sg_convert_errno(-clp->out0fd); + } + clp->outfp = outfp; + } + if (clp->verify && (clp->out_type == FT_DEV_NULL)) { + pr2serr("Can't do verify when OFILE not given\n"); + return SG_LIB_SYNTAX_ERROR; + } + + if ((FT_SG == clp->in_type) && (FT_SG == clp->out_type)) { + if (clp->in_flags.serial || clp->out_flags.serial) + pr2serr("serial flag ignored when both IFILE and OFILE are sg " + "devices\n"); + if (clp->in_flags.order_wr && (num_threads > 1)) + pr2serr("Warning: write ordering only guaranteed for single " + "thread\n"); + } else if (clp->in_flags.order_wr) + pr2serr("Warning: oflag=order only active on sg->sg copies\n"); + + if (outregf[0]) { + int ftyp = dd_filetype(outregf, clp->outreg_st_size); + + clp->outreg_type = ftyp; + if (! ((FT_OTHER == ftyp) || (FT_ERROR == ftyp) || + (FT_DEV_NULL == ftyp))) { + pr2serr("File: %s can only be regular file or pipe (or " + "/dev/null)\n", outregf); + return SG_LIB_SYNTAX_ERROR; + } + if ((clp->outregfd = open(outregf, O_WRONLY | O_CREAT, 0666)) < 0) { + err = errno; + snprintf(ebuff, EBUFF_SZ, "could not open %s for writing", + outregf); + perror(ebuff); + return sg_convert_errno(err); + } + if (clp->verbose > 1) + pr2serr("ofreg=%s opened okay, fd=%d\n", outregf, clp->outregfd); + if (FT_ERROR == ftyp) + clp->outreg_type = FT_OTHER; /* regular file created */ + } else + clp->outregfd = -1; + + if ((STDIN_FILENO == clp->in0fd) && (STDOUT_FILENO == clp->out0fd)) { + pr2serr("Won't default both IFILE to stdin _and_ OFILE to " + "/dev/null\n"); + pr2serr("For more information use '--help'\n"); + return SG_LIB_SYNTAX_ERROR; + } + if ((clp->in_type == FT_FIFO) && (! clp->i_sgl.is_pipe_suitable())) { + pr2serr("The skip= argument is not suitable for a pipe\n"); + return SG_LIB_SYNTAX_ERROR; + } + if ((clp->out_type == FT_FIFO) && (! clp->o_sgl.is_pipe_suitable())) { + pr2serr("The seek= argument is not suitable for a pipe\n"); + return SG_LIB_SYNTAX_ERROR; + } + res = do_count_work(clp, clp->inf_v[0].c_str(), in_num_sect, + clp->outf_v[0].c_str(), out_num_sect); + if (res) + return res; + + if (clp->verbose > 2) + pr2serr("Start of loop, count=%" PRId64 ", in_num_sect=%" PRId64 + ", out_num_sect=%" PRId64 "\n", clp->dd_count, in_num_sect, + out_num_sect); + if (clp->dd_count < 0) { + pr2serr("Couldn't calculate count, please give one\n"); + return SG_LIB_CAT_OTHER; + } + if (! clp->cdbsz_given) { + if ((FT_SG == clp->in_type) && (MAX_SCSI_CDB_SZ != clp->cdbsz_in) && + ((clp->i_sgl.high_lba_p1 > UINT_MAX) || (clp->bpt > USHRT_MAX))) { + pr2serr("Note: SCSI command size increased to 16 bytes (for " + "'if')\n"); + clp->cdbsz_in = MAX_SCSI_CDB_SZ; + } + if ((FT_SG == clp->out_type) && (MAX_SCSI_CDB_SZ != clp->cdbsz_out) && + ((clp->o_sgl.high_lba_p1 > UINT_MAX) || (clp->bpt > USHRT_MAX))) { + pr2serr("Note: SCSI command size increased to 16 bytes (for " + "'of')\n"); + clp->cdbsz_out = MAX_SCSI_CDB_SZ; + } + } + + for (auto && cvp : clp->cp_ver_arr) { + cvp.in_type = clp->in_type; + cvp.out_type = clp->out_type; + cvp.dd_count = clp->dd_count; + cvp.in_rem_count = clp->dd_count; + cvp.out_rem_count = clp->dd_count; + } + + if (clp->dry_run > 0) { + pr2serr("Due to --dry-run option, bypass copy/read\n"); + goto fini; + } + if (! clp->ofile_given) + pr2serr("of=OFILE not given so only read from IFILE, to output to " + "stdout use 'of=-'\n"); + + sigemptyset(&signal_set); + sigaddset(&signal_set, SIGINT); + sigaddset(&signal_set, SIGUSR2); + + res = sigprocmask(SIG_BLOCK, &signal_set, &orig_signal_set); + if (res < 0) { + pr2serr("sigprocmask failed: %s\n", safe_strerror(errno)); + goto fini; + } + + listen_thr_v.emplace_back(sig_listen_thread, clp); + + if (do_time) { + start_tm.tv_sec = 0; + start_tm.tv_usec = 0; + gettimeofday(&start_tm, NULL); + } + +/* vvvvvvvvvvv Start worker threads vvvvvvvvvvvvvvvvvvvvvvvv */ + if (num_threads > 0) { + auto & cvp = clp->cp_ver_arr[0]; + + cvp.in_fd = clp->in0fd; + cvp.out_fd = clp->out0fd; + + /* launch "infant" thread to catch early mortality, if any */ + work_thr_v.emplace_back(read_write_thread, clp, 0, 0, true); + { + unique_lock<mutex> lk(clp->infant_mut); + clp->infant_cv.wait(lk, []{ return gcoll.processed; }); + } + if (clp->cp_ver_arr[0].next_count_pos.load() < 0) { + /* infant thread error-ed out, join with it */ + for (auto & t : work_thr_v) { + if (t.joinable()) + t.join(); + } + goto jump; + } + + /* now start the rest of the threads */ + for (k = 1; k < num_threads; ++k) + work_thr_v.emplace_back(read_write_thread, clp, k, + k % (int)num_slices, false); + + /* now wait for worker threads to finish */ + for (auto & t : work_thr_v) { + if (t.joinable()) + t.join(); + } + } /* worker threads hereafter have all exited */ +jump: + if (do_time && (start_tm.tv_sec || start_tm.tv_usec)) + calc_duration_throughput(0); + + if (do_sync) { + if (FT_SG == clp->out_type) { + pr2serr_lk(">> Synchronizing cache on %s\n", + (clp->outf_v.size() ? clp->outf_v[0].c_str() : "" )); + res = sg_ll_sync_cache_10(clp->out0fd, 0, 0, 0, 0, 0, false, 0); + if (SG_LIB_CAT_UNIT_ATTENTION == res) { + pr2serr_lk("Unit attention(out), continuing\n"); + res = sg_ll_sync_cache_10(clp->out0fd, 0, 0, 0, 0, 0, false, + 0); + } + if (0 != res) + pr2serr_lk("Unable to synchronize cache\n"); + } + } + + shutting_down = true; + for (auto & t : listen_thr_v) { + if (t.joinable()) { + t.detach(); + if (listen_t_tid > 0) + kill(listen_t_tid, SIGUSR2); + // t.~thread(); /* kill listening thread; doesn't work */ + } + std::this_thread::yield(); // not enough it seems + { /* allow time for SIGUSR2 signal to get through */ + struct timespec tspec = {0, 1000000}; /* 1 msec */ + struct timespec rem; + + while ((nanosleep(&tspec, &rem) < 0) && (EINTR == errno)) + tspec = rem; + } + } + +fini: + if ((STDIN_FILENO != clp->in0fd) && (clp->in0fd >= 0)) + close(clp->in0fd); + if ((STDOUT_FILENO != clp->out0fd) && (FT_DEV_NULL != clp->out_type) && + (clp->out0fd >= 0)) + close(clp->out0fd); + if ((clp->outregfd >= 0) && (STDOUT_FILENO != clp->outregfd) && + (FT_DEV_NULL != clp->outreg_type)) + close(clp->outregfd); + print_stats(""); + if (clp->dio_incomplete_count.load()) { + int fd; + char c; + + pr2serr(">> Direct IO requested but incomplete %d times\n", + clp->dio_incomplete_count.load()); + 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); + } + } + + k = 0; + for (auto && cvp : gcoll.cp_ver_arr) { + if (cvp.state == cp_ver_pair_t::my_state::empty) + break; + ++k; + if (cvp.sum_of_resids.load()) + pr2serr(">> slice: %d, Non-zero sum of residual counts=%d\n", + k, cvp.sum_of_resids.load()); + } + if (clp->verbose && (num_start_eagain > 0)) + pr2serr("Number of start EAGAINs: %d\n", num_start_eagain.load()); + if (clp->verbose && (num_fin_eagain > 0)) + pr2serr("Number of finish EAGAINs: %d\n", num_fin_eagain.load()); + if (clp->verbose && (num_ebusy > 0)) + pr2serr("Number of EBUSYs: %d\n", num_ebusy.load()); + if (clp->verbose && (num_miscompare > 0)) + pr2serr("Number of miscompare%s: %d\n", + (num_miscompare > 1) ? "s" : "", num_miscompare.load()); + if (clp->verify && (SG_LIB_CAT_MISCOMPARE == res)) + pr2serr("Verify/compare failed due to miscompare\n"); + if (0 == res) + res = clp->reason_res.load(); + sigprocmask(SIG_SETMASK, &orig_signal_set, NULL); + if (clp->verbose) { + int num_sigusr2 = num_fallthru_sigusr2.load(); + if (num_sigusr2 > 0) + pr2serr("Number of fall-through SIGUSR2 signals caught: %d\n", + num_sigusr2); + } + return (res >= 0) ? res : SG_LIB_CAT_OTHER; +} |