965 lines
28 KiB
C
965 lines
28 KiB
C
/*
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* Copyright (c) 2005-2018 Douglas Gilbert.
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* All rights reserved.
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* Use of this source code is governed by a BSD-style
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* license that can be found in the BSD_LICENSE file.
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*/
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/* sg_pt_linux version 1.37 20180126 */
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/sysmacros.h> /* to define 'major' */
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#ifndef major
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#include <sys/types.h>
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#endif
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <linux/major.h>
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#include "sg_pt.h"
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#include "sg_lib.h"
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#include "sg_linux_inc.h"
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#include "sg_pt_linux.h"
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#ifdef major
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#define SG_DEV_MAJOR major
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#else
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#ifdef HAVE_LINUX_KDEV_T_H
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#include <linux/kdev_t.h>
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#endif
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#define SG_DEV_MAJOR MAJOR /* MAJOR() macro faulty if > 255 minors */
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#endif
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#ifndef BLOCK_EXT_MAJOR
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#define BLOCK_EXT_MAJOR 259
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#endif
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#define DEF_TIMEOUT 60000 /* 60,000 millisecs (60 seconds) */
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static const char * linux_host_bytes[] = {
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"DID_OK", "DID_NO_CONNECT", "DID_BUS_BUSY", "DID_TIME_OUT",
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"DID_BAD_TARGET", "DID_ABORT", "DID_PARITY", "DID_ERROR",
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"DID_RESET", "DID_BAD_INTR", "DID_PASSTHROUGH", "DID_SOFT_ERROR",
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"DID_IMM_RETRY", "DID_REQUEUE" /* 0xd */,
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"DID_TRANSPORT_DISRUPTED", "DID_TRANSPORT_FAILFAST",
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"DID_TARGET_FAILURE" /* 0x10 */,
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"DID_NEXUS_FAILURE (reservation conflict)",
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"DID_ALLOC_FAILURE",
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"DID_MEDIUM_ERROR",
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};
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#define LINUX_HOST_BYTES_SZ \
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(int)(sizeof(linux_host_bytes) / sizeof(linux_host_bytes[0]))
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static const char * linux_driver_bytes[] = {
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"DRIVER_OK", "DRIVER_BUSY", "DRIVER_SOFT", "DRIVER_MEDIA",
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"DRIVER_ERROR", "DRIVER_INVALID", "DRIVER_TIMEOUT", "DRIVER_HARD",
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"DRIVER_SENSE"
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};
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#define LINUX_DRIVER_BYTES_SZ \
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(int)(sizeof(linux_driver_bytes) / sizeof(linux_driver_bytes[0]))
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#if 0
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static const char * linux_driver_suggests[] = {
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"SUGGEST_OK", "SUGGEST_RETRY", "SUGGEST_ABORT", "SUGGEST_REMAP",
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"SUGGEST_DIE", "UNKNOWN","UNKNOWN","UNKNOWN",
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"SUGGEST_SENSE"
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};
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#define LINUX_DRIVER_SUGGESTS_SZ \
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(int)(sizeof(linux_driver_suggests) / sizeof(linux_driver_suggests[0]))
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#endif
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/*
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* These defines are for constants that should be visible in the
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* /usr/include/scsi directory (brought in by sg_linux_inc.h).
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* Redefined and aliased here to decouple this code from
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* sg_io_linux.h N.B. the SUGGEST_* constants are no longer used.
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*/
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#ifndef DRIVER_MASK
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#define DRIVER_MASK 0x0f
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#endif
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#ifndef SUGGEST_MASK
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#define SUGGEST_MASK 0xf0
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#endif
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#ifndef DRIVER_SENSE
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#define DRIVER_SENSE 0x08
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#endif
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#define SG_LIB_DRIVER_MASK DRIVER_MASK
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#define SG_LIB_SUGGEST_MASK SUGGEST_MASK
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#define SG_LIB_DRIVER_SENSE DRIVER_SENSE
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bool sg_bsg_nvme_char_major_checked = false;
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int sg_bsg_major = 0;
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volatile int sg_nvme_char_major = 0;
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long sg_lin_page_size = 4096; /* default, overridden with correct value */
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#if defined(__GNUC__) || defined(__clang__)
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static int pr2ws(const char * fmt, ...)
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__attribute__ ((format (printf, 1, 2)));
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#else
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static int pr2ws(const char * fmt, ...);
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#endif
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static int
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pr2ws(const char * fmt, ...)
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{
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va_list args;
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int n;
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va_start(args, fmt);
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n = vfprintf(sg_warnings_strm ? sg_warnings_strm : stderr, fmt, args);
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va_end(args);
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return n;
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}
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/* This function only needs to be called once (unless a NVMe controller
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* can be hot-plugged into system in which case it should be called
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* (again) after that event). */
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void
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sg_find_bsg_nvme_char_major(int verbose)
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{
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bool got_one = false;
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int n;
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const char * proc_devices = "/proc/devices";
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char * cp;
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FILE *fp;
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char a[128];
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char b[128];
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sg_lin_page_size = sysconf(_SC_PAGESIZE);
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if (NULL == (fp = fopen(proc_devices, "r"))) {
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if (verbose)
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pr2ws("fopen %s failed: %s\n", proc_devices, strerror(errno));
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return;
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}
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while ((cp = fgets(b, sizeof(b), fp))) {
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if ((1 == sscanf(b, "%126s", a)) &&
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(0 == memcmp(a, "Character", 9)))
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break;
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}
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while (cp && (cp = fgets(b, sizeof(b), fp))) {
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if (2 == sscanf(b, "%d %126s", &n, a)) {
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if (0 == strcmp("bsg", a)) {
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sg_bsg_major = n;
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if (got_one)
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break;
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got_one = true;
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} else if (0 == strcmp("nvme", a)) {
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sg_nvme_char_major = n;
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if (got_one)
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break;
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got_one = true;
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}
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} else
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break;
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}
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if (verbose > 3) {
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if (cp) {
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if (sg_bsg_major > 0)
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pr2ws("found sg_bsg_major=%d\n", sg_bsg_major);
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if (sg_nvme_char_major > 0)
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pr2ws("found sg_nvme_char_major=%d\n", sg_nvme_char_major);
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} else
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pr2ws("found no bsg not nvme char device in %s\n", proc_devices);
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}
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fclose(fp);
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}
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/* Assumes that sg_find_bsg_nvme_char_major() has already been called. Returns
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* true if dev_fd is a scsi generic pass-through device. If yields
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* *is_nvme_p = true with *nsid_p = 0 then dev_fd is a NVMe char device.
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* If yields *nsid_p > 0 then dev_fd is a NVMe block device. */
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static bool
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check_file_type(int dev_fd, struct stat * dev_statp, bool * is_bsg_p,
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bool * is_nvme_p, uint32_t * nsid_p, int * os_err_p,
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int verbose)
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{
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bool is_nvme = false;
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bool is_sg = false;
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bool is_bsg = false;
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bool is_block = false;
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int os_err = 0;
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int major_num;
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uint32_t nsid = 0; /* invalid NSID */
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if (dev_fd >= 0) {
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if (fstat(dev_fd, dev_statp) < 0) {
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os_err = errno;
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if (verbose)
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pr2ws("%s: fstat() failed: %s (errno=%d)\n", __func__,
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safe_strerror(os_err), os_err);
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goto skip_out;
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}
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major_num = (int)SG_DEV_MAJOR(dev_statp->st_rdev);
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if (S_ISCHR(dev_statp->st_mode)) {
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if (SCSI_GENERIC_MAJOR == major_num)
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is_sg = true;
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else if (sg_bsg_major == major_num)
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is_bsg = true;
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else if (sg_nvme_char_major == major_num)
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is_nvme = true;
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} else if (S_ISBLK(dev_statp->st_mode)) {
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is_block = true;
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if (BLOCK_EXT_MAJOR == major_num) {
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is_nvme = true;
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nsid = ioctl(dev_fd, NVME_IOCTL_ID, NULL);
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if (SG_NVME_BROADCAST_NSID == nsid) { /* means ioctl error */
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os_err = errno;
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if (verbose)
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pr2ws("%s: ioctl(NVME_IOCTL_ID) failed: %s "
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"(errno=%d)\n", __func__, safe_strerror(os_err),
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os_err);
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} else
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os_err = 0;
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}
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}
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} else {
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os_err = EBADF;
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if (verbose)
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pr2ws("%s: invalid file descriptor (%d)\n", __func__, dev_fd);
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}
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skip_out:
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if (verbose > 3) {
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pr2ws("%s: file descriptor is ", __func__);
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if (is_sg)
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pr2ws("sg device\n");
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else if (is_bsg)
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pr2ws("bsg device\n");
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else if (is_nvme && (0 == nsid))
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pr2ws("NVMe char device\n");
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else if (is_nvme)
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pr2ws("NVMe block device, nsid=%lld\n",
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((uint32_t)-1 == nsid) ? -1LL : (long long)nsid);
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else if (is_block)
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pr2ws("block device\n");
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else
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pr2ws("undetermined device, could be regular file\n");
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}
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if (is_bsg_p)
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*is_bsg_p = is_bsg;
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if (is_nvme_p)
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*is_nvme_p = is_nvme;
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if (nsid_p)
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*nsid_p = nsid;
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if (os_err_p)
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*os_err_p = os_err;
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return is_sg;
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}
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/* Assumes dev_fd is an "open" file handle associated with device_name. If
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* the implementation (possibly for one OS) cannot determine from dev_fd if
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* a SCSI or NVMe pass-through is referenced, then it might guess based on
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* device_name. Returns 1 if SCSI generic pass-though device, returns 2 if
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* secondary SCSI pass-through device (in Linux a bsg device); returns 3 is
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* char NVMe device (i.e. no NSID); returns 4 if block NVMe device (includes
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* NSID), or 0 if something else (e.g. ATA block device) or dev_fd < 0.
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* If error, returns negated errno (operating system) value. */
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int
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check_pt_file_handle(int dev_fd, const char * device_name, int verbose)
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{
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if (verbose > 4)
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pr2ws("%s: dev_fd=%d, device_name: %s\n", __func__, dev_fd,
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device_name);
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/* Linux doesn't need device_name to determine which pass-through */
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if (! sg_bsg_nvme_char_major_checked) {
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sg_bsg_nvme_char_major_checked = true;
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sg_find_bsg_nvme_char_major(verbose);
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}
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if (dev_fd >= 0) {
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bool is_sg, is_bsg, is_nvme;
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int err;
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uint32_t nsid;
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struct stat a_stat;
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is_sg = check_file_type(dev_fd, &a_stat, &is_bsg, &is_nvme, &nsid,
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&err, verbose);
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if (err)
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return -err;
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else if (is_sg)
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return 1;
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else if (is_bsg)
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return 2;
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else if (is_nvme && (0 == nsid))
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return 3;
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else if (is_nvme)
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return 4;
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else
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return 0;
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} else
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return 0;
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}
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/*
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* We make a runtime decision whether to use the sg v3 interface or the sg
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* v4 interface (currently exclusively used by the bsg driver). If all the
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* following are true we use sg v4 which is only currently supported on bsg
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* device nodes:
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* a) there is a bsg entry in the /proc/devices file
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* b) the device node given to scsi_pt_open() is a char device
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* c) the char major number of the device node given to scsi_pt_open()
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* matches the char major number of the bsg entry in /proc/devices
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* Otherwise the sg v3 interface is used.
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*
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* Note that in either case we prepare the data in a sg v4 structure. If
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* the runtime tests indicate that the v3 interface is needed then
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* do_scsi_pt_v3() transfers the input data into a v3 structure and
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* then the output data is transferred back into a sg v4 structure.
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* That implementation detail could change in the future.
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*
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* [20120806] Only use MAJOR() macro in kdev_t.h if that header file is
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* available and major() macro [N.B. lower case] is not available.
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*/
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#ifdef major
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#define SG_DEV_MAJOR major
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#else
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#ifdef HAVE_LINUX_KDEV_T_H
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#include <linux/kdev_t.h>
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#endif
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#define SG_DEV_MAJOR MAJOR /* MAJOR() macro faulty if > 255 minors */
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#endif
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/* Returns >= 0 if successful. If error in Unix returns negated errno. */
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int
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scsi_pt_open_device(const char * device_name, bool read_only, int verbose)
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{
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int oflags = O_NONBLOCK;
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oflags |= (read_only ? O_RDONLY : O_RDWR);
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return scsi_pt_open_flags(device_name, oflags, verbose);
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}
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/* Similar to scsi_pt_open_device() but takes Unix style open flags OR-ed */
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/* together. The 'flags' argument is advisory and may be ignored. */
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/* Returns >= 0 if successful, otherwise returns negated errno. */
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int
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scsi_pt_open_flags(const char * device_name, int flags, int verbose)
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{
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int fd;
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if (! sg_bsg_nvme_char_major_checked) {
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sg_bsg_nvme_char_major_checked = true;
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sg_find_bsg_nvme_char_major(verbose);
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}
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if (verbose > 1) {
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pr2ws("open %s with flags=0x%x\n", device_name, flags);
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}
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fd = open(device_name, flags);
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if (fd < 0) {
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fd = -errno;
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if (verbose > 1)
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pr2ws("%s: open(%s, 0x%x) failed: %s\n", __func__, device_name,
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flags, safe_strerror(-fd));
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}
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return fd;
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}
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/* Returns 0 if successful. If error in Unix returns negated errno. */
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int
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scsi_pt_close_device(int device_fd)
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{
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int res;
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res = close(device_fd);
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if (res < 0)
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res = -errno;
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return res;
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}
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/* Caller should additionally call get_scsi_pt_os_err() after this call */
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struct sg_pt_base *
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construct_scsi_pt_obj_with_fd(int dev_fd, int verbose)
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{
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int err;
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struct sg_pt_linux_scsi * ptp;
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/* The following 2 lines are temporary. It is to avoid a NULL pointer
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* crash when an old utility is used with a newer library built after
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* the sg_warnings_strm cleanup */
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if (NULL == sg_warnings_strm)
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sg_warnings_strm = stderr;
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ptp = (struct sg_pt_linux_scsi *)
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calloc(1, sizeof(struct sg_pt_linux_scsi));
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if (ptp) {
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err = set_pt_file_handle((struct sg_pt_base *)ptp, dev_fd, verbose);
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if ((0 == err) && (! ptp->is_nvme)) {
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ptp->io_hdr.guard = 'Q';
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#ifdef BSG_PROTOCOL_SCSI
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ptp->io_hdr.protocol = BSG_PROTOCOL_SCSI;
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#endif
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#ifdef BSG_SUB_PROTOCOL_SCSI_CMD
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ptp->io_hdr.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
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#endif
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}
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} else if (verbose)
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pr2ws("%s: calloc() failed, out of memory?\n", __func__);
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return (struct sg_pt_base *)ptp;
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}
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struct sg_pt_base *
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construct_scsi_pt_obj()
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{
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return construct_scsi_pt_obj_with_fd(-1 /* dev_fd */, 0 /* verbose */);
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}
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void
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destruct_scsi_pt_obj(struct sg_pt_base * vp)
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{
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struct sg_pt_linux_scsi * ptp = &vp->impl;
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if (ptp->free_nvme_id_ctlp) {
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free(ptp->free_nvme_id_ctlp);
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ptp->free_nvme_id_ctlp = NULL;
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ptp->nvme_id_ctlp = NULL;
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}
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if (ptp)
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free(ptp);
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}
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/* Remembers previous device file descriptor */
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void
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clear_scsi_pt_obj(struct sg_pt_base * vp)
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{
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bool is_sg, is_bsg, is_nvme;
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int fd;
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uint32_t nvme_nsid;
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struct sg_pt_linux_scsi * ptp = &vp->impl;
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if (ptp) {
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fd = ptp->dev_fd;
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is_sg = ptp->is_sg;
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is_bsg = ptp->is_bsg;
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is_nvme = ptp->is_nvme;
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nvme_nsid = ptp->nvme_nsid;
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memset(ptp, 0, sizeof(struct sg_pt_linux_scsi));
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ptp->io_hdr.guard = 'Q';
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#ifdef BSG_PROTOCOL_SCSI
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ptp->io_hdr.protocol = BSG_PROTOCOL_SCSI;
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#endif
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#ifdef BSG_SUB_PROTOCOL_SCSI_CMD
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ptp->io_hdr.subprotocol = BSG_SUB_PROTOCOL_SCSI_CMD;
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#endif
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ptp->dev_fd = fd;
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ptp->is_sg = is_sg;
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ptp->is_bsg = is_bsg;
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ptp->is_nvme = is_nvme;
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ptp->nvme_direct = false;
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ptp->nvme_nsid = nvme_nsid;
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}
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}
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/* Forget any previous dev_fd and install the one given. May attempt to
|
|
* find file type (e.g. if pass-though) from OS so there could be an error.
|
|
* Returns 0 for success or the same value as get_scsi_pt_os_err()
|
|
* will return. dev_fd should be >= 0 for a valid file handle or -1 . */
|
|
int
|
|
set_pt_file_handle(struct sg_pt_base * vp, int dev_fd, int verbose)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
struct stat a_stat;
|
|
|
|
if (! sg_bsg_nvme_char_major_checked) {
|
|
sg_bsg_nvme_char_major_checked = true;
|
|
sg_find_bsg_nvme_char_major(verbose);
|
|
}
|
|
ptp->dev_fd = dev_fd;
|
|
if (dev_fd >= 0)
|
|
ptp->is_sg = check_file_type(dev_fd, &a_stat, &ptp->is_bsg,
|
|
&ptp->is_nvme, &ptp->nvme_nsid,
|
|
&ptp->os_err, verbose);
|
|
else {
|
|
ptp->is_sg = false;
|
|
ptp->is_bsg = false;
|
|
ptp->is_nvme = false;
|
|
ptp->nvme_direct = false;
|
|
ptp->nvme_nsid = 0;
|
|
ptp->os_err = 0;
|
|
}
|
|
return ptp->os_err;
|
|
}
|
|
|
|
/* Valid file handles (which is the return value) are >= 0 . Returns -1
|
|
* if there is no valid file handle. */
|
|
int
|
|
get_pt_file_handle(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->dev_fd;
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_cdb(struct sg_pt_base * vp, const unsigned char * cdb,
|
|
int cdb_len)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (ptp->io_hdr.request)
|
|
++ptp->in_err;
|
|
ptp->io_hdr.request = (__u64)(sg_uintptr_t)cdb;
|
|
ptp->io_hdr.request_len = cdb_len;
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_sense(struct sg_pt_base * vp, unsigned char * sense,
|
|
int max_sense_len)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (ptp->io_hdr.response)
|
|
++ptp->in_err;
|
|
memset(sense, 0, max_sense_len);
|
|
ptp->io_hdr.response = (__u64)(sg_uintptr_t)sense;
|
|
ptp->io_hdr.max_response_len = max_sense_len;
|
|
}
|
|
|
|
/* Setup for data transfer from device */
|
|
void
|
|
set_scsi_pt_data_in(struct sg_pt_base * vp, unsigned char * dxferp,
|
|
int dxfer_ilen)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (ptp->io_hdr.din_xferp)
|
|
++ptp->in_err;
|
|
if (dxfer_ilen > 0) {
|
|
ptp->io_hdr.din_xferp = (__u64)(sg_uintptr_t)dxferp;
|
|
ptp->io_hdr.din_xfer_len = dxfer_ilen;
|
|
}
|
|
}
|
|
|
|
/* Setup for data transfer toward device */
|
|
void
|
|
set_scsi_pt_data_out(struct sg_pt_base * vp, const unsigned char * dxferp,
|
|
int dxfer_olen)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (ptp->io_hdr.dout_xferp)
|
|
++ptp->in_err;
|
|
if (dxfer_olen > 0) {
|
|
ptp->io_hdr.dout_xferp = (__u64)(sg_uintptr_t)dxferp;
|
|
ptp->io_hdr.dout_xfer_len = dxfer_olen;
|
|
}
|
|
}
|
|
|
|
void
|
|
set_pt_metadata_xfer(struct sg_pt_base * vp, unsigned char * dxferp,
|
|
uint32_t dxfer_len, bool out_true)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (dxfer_len > 0) {
|
|
ptp->mdxferp = dxferp;
|
|
ptp->mdxfer_len = dxfer_len;
|
|
ptp->mdxfer_out = out_true;
|
|
}
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_packet_id(struct sg_pt_base * vp, int pack_id)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
ptp->io_hdr.spare_in = pack_id;
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_tag(struct sg_pt_base * vp, uint64_t tag)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
ptp->io_hdr.request_tag = tag;
|
|
}
|
|
|
|
/* Note that task management function codes are transport specific */
|
|
void
|
|
set_scsi_pt_task_management(struct sg_pt_base * vp, int tmf_code)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
ptp->io_hdr.subprotocol = 1; /* SCSI task management function */
|
|
ptp->tmf_request[0] = (unsigned char)tmf_code; /* assume it fits */
|
|
ptp->io_hdr.request = (__u64)(sg_uintptr_t)(&(ptp->tmf_request[0]));
|
|
ptp->io_hdr.request_len = 1;
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_task_attr(struct sg_pt_base * vp, int attribute, int priority)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
ptp->io_hdr.request_attr = attribute;
|
|
ptp->io_hdr.request_priority = priority;
|
|
}
|
|
|
|
#ifndef BSG_FLAG_Q_AT_TAIL
|
|
#define BSG_FLAG_Q_AT_TAIL 0x10
|
|
#endif
|
|
#ifndef BSG_FLAG_Q_AT_HEAD
|
|
#define BSG_FLAG_Q_AT_HEAD 0x20
|
|
#endif
|
|
|
|
/* Need this later if translated to v3 interface */
|
|
#ifndef SG_FLAG_Q_AT_TAIL
|
|
#define SG_FLAG_Q_AT_TAIL 0x10
|
|
#endif
|
|
#ifndef SG_FLAG_Q_AT_HEAD
|
|
#define SG_FLAG_Q_AT_HEAD 0x20
|
|
#endif
|
|
|
|
void
|
|
set_scsi_pt_flags(struct sg_pt_base * vp, int flags)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
/* default action of bsg driver (sg v4) is QUEUE_AT_HEAD */
|
|
/* default action of block layer SG_IO ioctl is QUEUE_AT_TAIL */
|
|
if (SCSI_PT_FLAGS_QUEUE_AT_HEAD & flags) { /* favour AT_HEAD */
|
|
ptp->io_hdr.flags |= BSG_FLAG_Q_AT_HEAD;
|
|
ptp->io_hdr.flags &= ~BSG_FLAG_Q_AT_TAIL;
|
|
} else if (SCSI_PT_FLAGS_QUEUE_AT_TAIL & flags) {
|
|
ptp->io_hdr.flags |= BSG_FLAG_Q_AT_TAIL;
|
|
ptp->io_hdr.flags &= ~BSG_FLAG_Q_AT_HEAD;
|
|
}
|
|
}
|
|
|
|
/* N.B. Returns din_resid and ignores dout_resid */
|
|
int
|
|
get_scsi_pt_resid(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (NULL == ptp)
|
|
return 0;
|
|
return ptp->nvme_direct ? 0 : ptp->io_hdr.din_resid;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_status_response(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (NULL == ptp)
|
|
return 0;
|
|
return (int)(ptp->nvme_direct ? ptp->nvme_status :
|
|
ptp->io_hdr.device_status);
|
|
}
|
|
|
|
uint32_t
|
|
get_pt_result(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
if (NULL == ptp)
|
|
return 0;
|
|
return ptp->nvme_direct ? ptp->nvme_result :
|
|
ptp->io_hdr.device_status;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_sense_len(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->io_hdr.response_len;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_duration_ms(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->io_hdr.duration;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_transport_err(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->io_hdr.transport_status;
|
|
}
|
|
|
|
void
|
|
set_scsi_pt_transport_err(struct sg_pt_base * vp, int err)
|
|
{
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
ptp->io_hdr.transport_status = err;
|
|
}
|
|
|
|
/* Returns b which will contain a null char terminated string (if
|
|
* max_b_len > 0). Combined driver and transport (called "host" in Linux
|
|
* kernel) statuses */
|
|
char *
|
|
get_scsi_pt_transport_err_str(const struct sg_pt_base * vp, int max_b_len,
|
|
char * b)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
int ds = ptp->io_hdr.driver_status;
|
|
int hs = ptp->io_hdr.transport_status;
|
|
int n, m;
|
|
char * cp = b;
|
|
int driv;
|
|
const char * driv_cp = "invalid";
|
|
|
|
if (max_b_len < 1)
|
|
return b;
|
|
m = max_b_len;
|
|
n = 0;
|
|
if (hs) {
|
|
if ((hs < 0) || (hs >= LINUX_HOST_BYTES_SZ))
|
|
n = snprintf(cp, m, "Host_status=0x%02x is invalid\n", hs);
|
|
else
|
|
n = snprintf(cp, m, "Host_status=0x%02x [%s]\n", hs,
|
|
linux_host_bytes[hs]);
|
|
}
|
|
m -= n;
|
|
if (m < 1) {
|
|
b[max_b_len - 1] = '\0';
|
|
return b;
|
|
}
|
|
cp += n;
|
|
driv = ds & SG_LIB_DRIVER_MASK;
|
|
if (driv < LINUX_DRIVER_BYTES_SZ)
|
|
driv_cp = linux_driver_bytes[driv];
|
|
#if 0
|
|
sugg = (ds & SG_LIB_SUGGEST_MASK) >> 4;
|
|
if (sugg < LINUX_DRIVER_SUGGESTS_SZ)
|
|
sugg_cp = linux_driver_suggests[sugg];
|
|
#endif
|
|
n = snprintf(cp, m, "Driver_status=0x%02x [%s]\n", ds, driv_cp);
|
|
m -= n;
|
|
if (m < 1)
|
|
b[max_b_len - 1] = '\0';
|
|
return b;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_result_category(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
int dr_st = ptp->io_hdr.driver_status & SG_LIB_DRIVER_MASK;
|
|
int scsi_st = ptp->io_hdr.device_status & 0x7e;
|
|
|
|
if (ptp->os_err)
|
|
return SCSI_PT_RESULT_OS_ERR;
|
|
else if (ptp->io_hdr.transport_status)
|
|
return SCSI_PT_RESULT_TRANSPORT_ERR;
|
|
else if (dr_st && (SG_LIB_DRIVER_SENSE != dr_st))
|
|
return SCSI_PT_RESULT_TRANSPORT_ERR;
|
|
else if ((SG_LIB_DRIVER_SENSE == dr_st) ||
|
|
(SAM_STAT_CHECK_CONDITION == scsi_st) ||
|
|
(SAM_STAT_COMMAND_TERMINATED == scsi_st))
|
|
return SCSI_PT_RESULT_SENSE;
|
|
else if (scsi_st)
|
|
return SCSI_PT_RESULT_STATUS;
|
|
else
|
|
return SCSI_PT_RESULT_GOOD;
|
|
}
|
|
|
|
int
|
|
get_scsi_pt_os_err(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->os_err;
|
|
}
|
|
|
|
char *
|
|
get_scsi_pt_os_err_str(const struct sg_pt_base * vp, int max_b_len, char * b)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
const char * cp;
|
|
|
|
cp = safe_strerror(ptp->os_err);
|
|
strncpy(b, cp, max_b_len);
|
|
if ((int)strlen(cp) >= max_b_len)
|
|
b[max_b_len - 1] = '\0';
|
|
return b;
|
|
}
|
|
|
|
bool
|
|
pt_device_is_nvme(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->is_nvme;
|
|
}
|
|
|
|
/* If a NVMe block device (which includes the NSID) handle is associated
|
|
* with 'vp', then its NSID is returned (values range from 0x1 to
|
|
* 0xffffffe). Otherwise 0 is returned. */
|
|
uint32_t
|
|
get_pt_nvme_nsid(const struct sg_pt_base * vp)
|
|
{
|
|
const struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
|
|
return ptp->nvme_nsid;
|
|
}
|
|
|
|
/* Executes SCSI command using sg v3 interface */
|
|
static int
|
|
do_scsi_pt_v3(struct sg_pt_linux_scsi * ptp, int fd, int time_secs,
|
|
int verbose)
|
|
{
|
|
struct sg_io_hdr v3_hdr;
|
|
|
|
memset(&v3_hdr, 0, sizeof(v3_hdr));
|
|
/* convert v4 to v3 header */
|
|
v3_hdr.interface_id = 'S';
|
|
v3_hdr.dxfer_direction = SG_DXFER_NONE;
|
|
v3_hdr.cmdp = (unsigned char *)(long)ptp->io_hdr.request;
|
|
v3_hdr.cmd_len = (unsigned char)ptp->io_hdr.request_len;
|
|
if (ptp->io_hdr.din_xfer_len > 0) {
|
|
if (ptp->io_hdr.dout_xfer_len > 0) {
|
|
if (verbose)
|
|
pr2ws("sgv3 doesn't support bidi\n");
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
}
|
|
v3_hdr.dxferp = (void *)(long)ptp->io_hdr.din_xferp;
|
|
v3_hdr.dxfer_len = (unsigned int)ptp->io_hdr.din_xfer_len;
|
|
v3_hdr.dxfer_direction = SG_DXFER_FROM_DEV;
|
|
} else if (ptp->io_hdr.dout_xfer_len > 0) {
|
|
v3_hdr.dxferp = (void *)(long)ptp->io_hdr.dout_xferp;
|
|
v3_hdr.dxfer_len = (unsigned int)ptp->io_hdr.dout_xfer_len;
|
|
v3_hdr.dxfer_direction = SG_DXFER_TO_DEV;
|
|
}
|
|
if (ptp->io_hdr.response && (ptp->io_hdr.max_response_len > 0)) {
|
|
v3_hdr.sbp = (unsigned char *)(long)ptp->io_hdr.response;
|
|
v3_hdr.mx_sb_len = (unsigned char)ptp->io_hdr.max_response_len;
|
|
}
|
|
v3_hdr.pack_id = (int)ptp->io_hdr.spare_in;
|
|
if (BSG_FLAG_Q_AT_HEAD & ptp->io_hdr.flags)
|
|
v3_hdr.flags |= SG_FLAG_Q_AT_HEAD; /* favour AT_HEAD */
|
|
else if (BSG_FLAG_Q_AT_TAIL & ptp->io_hdr.flags)
|
|
v3_hdr.flags |= SG_FLAG_Q_AT_TAIL;
|
|
|
|
if (NULL == v3_hdr.cmdp) {
|
|
if (verbose)
|
|
pr2ws("No SCSI command (cdb) given\n");
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
}
|
|
/* io_hdr.timeout is in milliseconds, if greater than zero */
|
|
v3_hdr.timeout = ((time_secs > 0) ? (time_secs * 1000) : DEF_TIMEOUT);
|
|
/* Finally do the v3 SG_IO ioctl */
|
|
if (ioctl(fd, SG_IO, &v3_hdr) < 0) {
|
|
ptp->os_err = errno;
|
|
if (verbose > 1)
|
|
pr2ws("ioctl(SG_IO v3) failed: %s (errno=%d)\n",
|
|
safe_strerror(ptp->os_err), ptp->os_err);
|
|
return -ptp->os_err;
|
|
}
|
|
ptp->io_hdr.device_status = (__u32)v3_hdr.status;
|
|
ptp->io_hdr.driver_status = (__u32)v3_hdr.driver_status;
|
|
ptp->io_hdr.transport_status = (__u32)v3_hdr.host_status;
|
|
ptp->io_hdr.response_len = (__u32)v3_hdr.sb_len_wr;
|
|
ptp->io_hdr.duration = (__u32)v3_hdr.duration;
|
|
ptp->io_hdr.din_resid = (__s32)v3_hdr.resid;
|
|
/* v3_hdr.info not passed back since no mapping defined (yet) */
|
|
return 0;
|
|
}
|
|
|
|
/* Executes SCSI command (or at least forwards it to lower layers).
|
|
* Returns 0 for success, negative numbers are negated 'errno' values from
|
|
* OS system calls. Positive return values are errors from this package. */
|
|
int
|
|
do_scsi_pt(struct sg_pt_base * vp, int fd, int time_secs, int verbose)
|
|
{
|
|
int err;
|
|
struct sg_pt_linux_scsi * ptp = &vp->impl;
|
|
bool have_checked_for_type = (ptp->dev_fd >= 0);
|
|
|
|
if (! sg_bsg_nvme_char_major_checked) {
|
|
sg_bsg_nvme_char_major_checked = true;
|
|
sg_find_bsg_nvme_char_major(verbose);
|
|
}
|
|
if (ptp->in_err) {
|
|
if (verbose)
|
|
pr2ws("Replicated or unused set_scsi_pt... functions\n");
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
}
|
|
if (fd >= 0) {
|
|
if ((ptp->dev_fd >= 0) && (fd != ptp->dev_fd)) {
|
|
if (verbose)
|
|
pr2ws("%s: file descriptor given to create() and here "
|
|
"differ\n", __func__);
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
}
|
|
ptp->dev_fd = fd;
|
|
} else if (ptp->dev_fd < 0) {
|
|
if (verbose)
|
|
pr2ws("%s: invalid file descriptors\n", __func__);
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
} else
|
|
fd = ptp->dev_fd;
|
|
if (! have_checked_for_type) {
|
|
err = set_pt_file_handle(vp, ptp->dev_fd, verbose);
|
|
if (err)
|
|
return -ptp->os_err;
|
|
}
|
|
if (ptp->os_err)
|
|
return -ptp->os_err;
|
|
if (ptp->is_nvme)
|
|
return sg_do_nvme_pt(vp, -1, time_secs, verbose);
|
|
else if (sg_bsg_major <= 0)
|
|
return do_scsi_pt_v3(ptp, fd, time_secs, verbose);
|
|
else if (ptp->is_bsg)
|
|
; /* drop through to sg v4 implementation */
|
|
else
|
|
return do_scsi_pt_v3(ptp, fd, time_secs, verbose);
|
|
|
|
if (! ptp->io_hdr.request) {
|
|
if (verbose)
|
|
pr2ws("No SCSI command (cdb) given (v4)\n");
|
|
return SCSI_PT_DO_BAD_PARAMS;
|
|
}
|
|
/* io_hdr.timeout is in milliseconds */
|
|
ptp->io_hdr.timeout = ((time_secs > 0) ? (time_secs * 1000) :
|
|
DEF_TIMEOUT);
|
|
#if 0
|
|
/* sense buffer already zeroed */
|
|
if (ptp->io_hdr.response && (ptp->io_hdr.max_response_len > 0)) {
|
|
void * p;
|
|
|
|
p = (void *)(long)ptp->io_hdr.response;
|
|
memset(p, 0, ptp->io_hdr.max_response_len);
|
|
}
|
|
#endif
|
|
if (ioctl(fd, SG_IO, &ptp->io_hdr) < 0) {
|
|
ptp->os_err = errno;
|
|
if (verbose > 1)
|
|
pr2ws("ioctl(SG_IO v4) failed: %s (errno=%d)\n",
|
|
safe_strerror(ptp->os_err), ptp->os_err);
|
|
return -ptp->os_err;
|
|
}
|
|
return 0;
|
|
}
|