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Date: Thu, 27 Oct 2022 13:15:32 +0800
From: Randall Huang <huangrandall@...gle.com>
To: jaegeuk@...nel.org, yuchao0@...wei.com,
linux-f2fs-devel@...ts.sourceforge.net, kernel-team@...roid.com,
linux-kernel@...r.kernel.org
Cc: huangrandall@...gle.com
Subject: [PATCH] Introduce sg_read_buffer
Support UFS error history dumping
Signed-off-by: Randall Huang <huangrandall@...gle.com>
---
tools/sg_write_buffer/Android.bp | 19 ++
tools/sg_write_buffer/sg_read_buffer.c | 334 +++++++++++++++++++++++++
2 files changed, 353 insertions(+)
create mode 100644 tools/sg_write_buffer/sg_read_buffer.c
diff --git a/tools/sg_write_buffer/Android.bp b/tools/sg_write_buffer/Android.bp
index 5222a59..f488aea 100644
--- a/tools/sg_write_buffer/Android.bp
+++ b/tools/sg_write_buffer/Android.bp
@@ -25,3 +25,22 @@ cc_binary {
"sg_pt_linux_nvme.c",
],
}
+
+cc_binary {
+ name: "sg_read_buffer",
+ defaults: [ "sg3-utils-defaults" ],
+ srcs: [
+ "sg_read_buffer.c",
+ "sg_cmds_basic.c",
+ "sg_cmds_basic2.c",
+ "sg_cmds_extra.c",
+ "sg_cmds_mmc.c",
+ "sg_io_linux.c",
+ "sg_lib.c",
+ "sg_lib_data.c",
+ "sg_pt_common.c",
+ "sg_pt_linux.c",
+ "sg_pt_linux_nvme.c",
+ ],
+ system_ext_specific: true,
+}
diff --git a/tools/sg_write_buffer/sg_read_buffer.c b/tools/sg_write_buffer/sg_read_buffer.c
new file mode 100644
index 0000000..1924c7d
--- /dev/null
+++ b/tools/sg_write_buffer/sg_read_buffer.c
@@ -0,0 +1,334 @@
+/*
+ * Copyright (c) 2006-2013 Luben Tuikov and Douglas Gilbert.
+ * All rights reserved.
+ * Use of this source code is governed by a BSD-style
+ * license that can be found in the BSD_LICENSE file.
+ */
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <string.h>
+#include <getopt.h>
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "sg_lib.h"
+#include "sg_cmds_basic.h"
+#include "sg_cmds_extra.h"
+#include "sg_pt.h" /* needed for scsi_pt_win32_direct() */
+
+/*
+ * This utility issues the SCSI READ BUFFER command to the given device.
+ */
+
+static const char * version_str = "1.09 20130507";
+
+
+static struct option long_options[] = {
+ {"help", 0, 0, 'h'},
+ {"hex", 0, 0, 'H'},
+ {"id", 1, 0, 'i'},
+ {"length", 1, 0, 'l'},
+ {"mode", 1, 0, 'm'},
+ {"offset", 1, 0, 'o'},
+ {"raw", 0, 0, 'r'},
+ {"verbose", 0, 0, 'v'},
+ {"version", 0, 0, 'V'},
+ {0, 0, 0, 0},
+};
+
+
+static void
+usage()
+{
+ fprintf(stderr, "Usage: "
+ "sg_read_buffer [--help] [--hex] [--id=ID] [--length=LEN] "
+ "[--mode=MO]\n"
+ " [--offset=OFF] [--raw] [--verbose] "
+ "[--version] DEVICE\n"
+ " where:\n"
+ " --help|-h print out usage message\n"
+ " --hex|-H print output in hex\n"
+ " --id=ID|-i ID buffer identifier (0 (default) to 255)\n"
+ " --length=LEN|-l LEN length in bytes to read (def: 4)\n"
+ " --mode=MO|-m MO read buffer mode, MO is number or "
+ "acronym (def: 0)\n"
+ " --off=OFF|-o OFF buffer offset (unit: bytes, def: 0)\n"
+ " --raw|-r output response to stdout\n"
+ " --verbose|-v increase verbosity\n"
+ " --version|-V print version string and exit\n\n"
+ " Numbers given in options are decimal unless they have a "
+ "hex indicator\n"
+ "Performs a SCSI READ BUFFER command\n"
+ );
+
+}
+
+#define MODE_HEADER_DATA 0
+#define MODE_VENDOR 1
+#define MODE_DATA 2
+#define MODE_DESCRIPTOR 3
+#define MODE_ECHO_BUFFER 0x0A
+#define MODE_ECHO_BDESC 0x0B
+#define MODE_EN_EX_ECHO 0x1A
+#define MODE_ERR_HISTORY 0x1C
+
+static struct mode_s {
+ const char *mode_string;
+ int mode;
+ const char *comment;
+} modes[] = {
+ { "hd", MODE_HEADER_DATA, "combined header and data"},
+ { "vendor", MODE_VENDOR, "vendor specific"},
+ { "data", MODE_DATA, "data"},
+ { "desc", MODE_DESCRIPTOR, "descriptor"},
+ { "echo", MODE_ECHO_BUFFER, "read data from echo buffer "
+ "(spc-2)"},
+ { "echo_desc", MODE_ECHO_BDESC, "echo buffer descriptor (spc-2)"},
+ { "en_ex", MODE_EN_EX_ECHO,
+ "enable expander communications protocol and echo buffer (spc-3)"},
+ { "err_hist", MODE_ERR_HISTORY, "error history (spc-4)"},
+};
+
+#define NUM_MODES ((int)(sizeof(modes)/sizeof(modes[0])))
+
+static void
+print_modes(void)
+{
+ int k;
+
+ fprintf(stderr, "The modes parameter argument can be numeric "
+ "(hex or decimal)\nor symbolic:\n");
+ for (k = 0; k < NUM_MODES; k++) {
+ fprintf(stderr, " %2d (0x%02x) %-16s%s\n", modes[k].mode,
+ modes[k].mode, modes[k].mode_string, modes[k].comment);
+ }
+}
+
+static void
+dStrRaw(const char* str, int len)
+{
+ int k;
+
+ for (k = 0 ; k < len; ++k)
+ printf("%c", str[k]);
+}
+
+int
+main(int argc, char * argv[])
+{
+ int sg_fd, res, c, len, k;
+ int do_help = 0;
+ int do_hex = 0;
+ int rb_id = 0;
+ int rb_len = 4;
+ int rb_mode = 0;
+ int rb_offset = 0;
+ int do_raw = 0;
+ int verbose = 0;
+ const char * device_name = NULL;
+ unsigned char * resp;
+ int ret = 0;
+
+ while (1) {
+ int option_index = 0;
+
+ c = getopt_long(argc, argv, "hHi:l:m:o:rvV", long_options,
+ &option_index);
+ if (c == -1)
+ break;
+
+ switch (c) {
+ case 'h':
+ case '?':
+ ++do_help;
+ break;
+ case 'H':
+ ++do_hex;
+ break;
+ case 'i':
+ rb_id = sg_get_num(optarg);
+ if ((rb_id < 0) || (rb_id > 255)) {
+ fprintf(stderr, "argument to '--id' should be in the range "
+ "0 to 255\n");
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ break;
+ case 'l':
+ rb_len = sg_get_num(optarg);
+ if (rb_len < 0) {
+ fprintf(stderr, "bad argument to '--length'\n");
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ break;
+ case 'm':
+ if (isdigit(*optarg)) {
+ rb_mode = sg_get_num(optarg);
+ if ((rb_mode < 0) || (rb_mode > 31)) {
+ fprintf(stderr, "argument to '--mode' should be in the "
+ "range 0 to 31\n");
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ } else {
+ len = strlen(optarg);
+ for (k = 0; k < NUM_MODES; ++k) {
+ if (0 == strncmp(modes[k].mode_string, optarg, len)) {
+ rb_mode = modes[k].mode;
+ break;
+ }
+ }
+ if (NUM_MODES == k) {
+ print_modes();
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ }
+ break;
+ case 'o':
+ rb_offset = sg_get_num(optarg);
+ if (rb_offset < 0) {
+ fprintf(stderr, "bad argument to '--offset'\n");
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ break;
+ case 'r':
+ ++do_raw;
+ break;
+ case 'v':
+ ++verbose;
+ break;
+ case 'V':
+ fprintf(stderr, "version: %s\n", version_str);
+ return 0;
+ default:
+ fprintf(stderr, "unrecognised option code 0x%x ??\n", c);
+ usage();
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ }
+ if (do_help) {
+ if (do_help > 1) {
+ usage();
+ fprintf(stderr, "\n");
+ print_modes();
+ } else
+ usage();
+ return 0;
+ }
+ if (optind < argc) {
+ if (NULL == device_name) {
+ device_name = argv[optind];
+ ++optind;
+ }
+ if (optind < argc) {
+ for (; optind < argc; ++optind)
+ fprintf(stderr, "Unexpected extra argument: %s\n",
+ argv[optind]);
+ usage();
+ return SG_LIB_SYNTAX_ERROR;
+ }
+ }
+
+ if (NULL == device_name) {
+ fprintf(stderr, "missing device name!\n");
+ usage();
+ return SG_LIB_SYNTAX_ERROR;
+ }
+
+ if (rb_len > 0) {
+ resp = (unsigned char *)malloc(rb_len);
+ if (NULL == resp) {
+ fprintf(stderr, "unable to allocate %d bytes on the heap\n",
+ rb_len);
+ return SG_LIB_CAT_OTHER;
+ }
+ memset(resp, 0, rb_len);
+ } else
+ resp = NULL;
+
+ if (do_raw) {
+ if (sg_set_binary_mode(STDOUT_FILENO) < 0) {
+ perror("sg_set_binary_mode");
+ return SG_LIB_FILE_ERROR;
+ }
+ }
+
+#ifdef SG_LIB_WIN32
+#ifdef SG_LIB_WIN32_DIRECT
+ if (verbose > 4)
+ fprintf(stderr, "Initial win32 SPT interface state: %s\n",
+ scsi_pt_win32_spt_state() ? "direct" : "indirect");
+ scsi_pt_win32_direct(SG_LIB_WIN32_DIRECT /* SPT pt interface */);
+#endif
+#endif
+
+ sg_fd = sg_cmds_open_device(device_name, 0 /* rw */, verbose);
+ if (sg_fd < 0) {
+ fprintf(stderr, "open error: %s: %s\n", device_name,
+ safe_strerror(-sg_fd));
+ return SG_LIB_FILE_ERROR;
+ }
+
+ res = sg_ll_read_buffer(sg_fd, rb_mode, rb_id, rb_offset, resp,
+ rb_len, 1, verbose);
+ if (0 != res) {
+ ret = res;
+ switch (res) {
+ case SG_LIB_CAT_NOT_READY:
+ fprintf(stderr, "Read buffer failed, device not ready\n");
+ break;
+ case SG_LIB_CAT_UNIT_ATTENTION:
+ fprintf(stderr, "Read buffer not done, unit attention\n");
+ break;
+ case SG_LIB_CAT_ABORTED_COMMAND:
+ fprintf(stderr, "Read buffer, aborted command\n");
+ break;
+ case SG_LIB_CAT_INVALID_OP:
+ fprintf(stderr, "Read buffer command not supported\n");
+ break;
+ case SG_LIB_CAT_ILLEGAL_REQ:
+ fprintf(stderr, "bad field in Read buffer cdb\n");
+ break;
+ default:
+ fprintf(stderr, "Read buffer failed res=%d\n", res);
+ break;
+ }
+ } else if (rb_len > 0) {
+ if (do_raw)
+ dStrRaw((const char *)resp, rb_len);
+ else if (do_hex || (rb_len < 4))
+ dStrHex((const char *)resp, rb_len, ((do_hex > 1) ? 0 : 1));
+ else {
+ switch (rb_mode) {
+ case MODE_DESCRIPTOR:
+ k = (resp[1] << 16) | (resp[2] << 8) | resp[3];
+ printf("OFFSET BOUNDARY: %d, Buffer offset alignment: "
+ "%d-byte\n", resp[0], (1 << resp[0]));
+ printf("BUFFER CAPACITY: %d (0x%x)\n", k, k);
+ break;
+ case MODE_ECHO_BDESC:
+ k = ((resp[2] & 0x1F) << 8) | resp[3];
+
+ printf("EBOS:%d\n", resp[0] & 1 ? 1 : 0);
+ printf("Echo buffer capacity: %d (0x%x)\n", k, k);
+ break;
+ default:
+ dStrHex((const char *)resp, rb_len, (verbose > 1 ? 0 : 1));
+ break;
+ }
+ }
+ }
+
+ if (resp)
+ free(resp);
+ res = sg_cmds_close_device(sg_fd);
+ if (res < 0) {
+ fprintf(stderr, "close error: %s\n", safe_strerror(-res));
+ if (0 == ret)
+ return SG_LIB_FILE_ERROR;
+ }
+ return (ret >= 0) ? ret : SG_LIB_CAT_OTHER;
+}
--
2.38.0.135.g90850a2211-goog
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