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freebsd-dev/sbin/camcontrol/modeedit.c
Alexander Motin b7e08f9305 Make GCC happy about math in r350676. 
MFC after:	1 week
2019-08-07 15:05:08 +00:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
*
* Copyright (c) 2000 Kelly Yancey <kbyanc@posi.net>
* Derived from work done by Julian Elischer <julian@tfs.com,
* julian@dialix.oz.au>, 1993, and Peter Dufault <dufault@hda.com>, 1994.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer,
* without modification, immediately at the beginning of the file.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/queue.h>
#include <sys/types.h>
#include <sys/sbuf.h>
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <sysexits.h>
#include <unistd.h>
#include <cam/scsi/scsi_all.h>
#include <cam/cam.h>
#include <cam/cam_ccb.h>
#include <camlib.h>
#include "camcontrol.h"
#define DEFAULT_SCSI_MODE_DB "/usr/share/misc/scsi_modes"
#define DEFAULT_EDITOR "vi"
#define MAX_FORMAT_SPEC 4096 /* Max CDB format specifier. */
#define MAX_PAGENUM_LEN 10 /* Max characters in page num. */
#define MAX_PAGENAME_LEN 64 /* Max characters in page name. */
#define PAGEDEF_START '{' /* Page definition delimiter. */
#define PAGEDEF_END '}' /* Page definition delimiter. */
#define PAGENAME_START '"' /* Page name delimiter. */
#define PAGENAME_END '"' /* Page name delimiter. */
#define PAGEENTRY_END ';' /* Page entry terminator (optional). */
#define MAX_DATA_SIZE 4096 /* Mode/Log sense data buffer size. */
#define PAGE_CTRL_SHIFT 6 /* Bit offset to page control field. */
struct editentry {
STAILQ_ENTRY(editentry) link;
char *name;
char type;
int editable;
int size;
union {
int ivalue;
char *svalue;
} value;
};
static STAILQ_HEAD(, editentry) editlist; /* List of page entries. */
static int editlist_changed = 0; /* Whether any entries were changed. */
struct pagename {
SLIST_ENTRY(pagename) link;
int page;
int subpage;
char *name;
};
static SLIST_HEAD(, pagename) namelist; /* Page number to name mappings. */
static char format[MAX_FORMAT_SPEC]; /* Buffer for scsi cdb format def. */
static FILE *edit_file = NULL; /* File handle for edit file. */
static char edit_path[] = "/tmp/camXXXXXX";
/* Function prototypes. */
static void editentry_create(void *hook, int letter, void *arg,
int count, char *name);
static void editentry_update(void *hook, int letter, void *arg,
int count, char *name);
static void editentry_create_desc(void *hook, int letter, void *arg,
int count, char *name);
static int editentry_save(void *hook, char *name);
static struct editentry *editentry_lookup(char *name);
static int editentry_set(char *name, char *newvalue,
int editonly);
static void editlist_populate(struct cam_device *device,
int cdb_len, int dbd, int pc, int page, int subpage,
int task_attr, int retries, int timeout);
static void editlist_populate_desc(struct cam_device *device,
int cdb_len, int llbaa, int pc, int page,
int subpage, int task_attr, int retries,
int timeout);
static void editlist_save(struct cam_device *device, int cdb_len,
int dbd, int pc, int page, int subpage,
int task_attr, int retries, int timeout);
static void editlist_save_desc(struct cam_device *device, int cdb_len,
int llbaa, int pc, int page, int subpage,
int task_attr, int retries, int timeout);
static void nameentry_create(int page, int subpage, char *name);
static struct pagename *nameentry_lookup(int page, int subpage);
static int load_format(const char *pagedb_path, int lpage,
int lsubpage);
static int modepage_write(FILE *file, int editonly);
static int modepage_read(FILE *file);
static void modepage_edit(void);
static void modepage_dump(struct cam_device *device, int cdb_len,
int dbd, int pc, int page, int subpage,
int task_attr, int retries, int timeout);
static void modepage_dump_desc(struct cam_device *device,
int cdb_len, int llbaa, int pc, int page,
int subpage, int task_attr, int retries,
int timeout);
static void cleanup_editfile(void);
#define returnerr(code) do { \
errno = code; \
return (-1); \
} while (0)
#define RTRIM(string) do { \
int _length; \
while (isspace(string[_length = strlen(string) - 1])) \
string[_length] = '\0'; \
} while (0)
static void
editentry_create(void *hook __unused, int letter, void *arg, int count,
char *name)
{
struct editentry *newentry; /* Buffer to hold new entry. */
/* Allocate memory for the new entry and a copy of the entry name. */
if ((newentry = malloc(sizeof(struct editentry))) == NULL ||
(newentry->name = strdup(name)) == NULL)
err(EX_OSERR, NULL);
/* Trim any trailing whitespace for the entry name. */
RTRIM(newentry->name);
newentry->editable = (arg != NULL);
newentry->type = letter;
newentry->size = count; /* Placeholder; not accurate. */
newentry->value.svalue = NULL;
STAILQ_INSERT_TAIL(&editlist, newentry, link);
}
static void
editentry_update(void *hook __unused, int letter, void *arg, int count,
char *name)
{
struct editentry *dest; /* Buffer to hold entry to update. */
dest = editentry_lookup(name);
assert(dest != NULL);
dest->type = letter;
dest->size = count; /* We get the real size now. */
switch (dest->type) {
case 'i': /* Byte-sized integral type. */
case 'b': /* Bit-sized integral types. */
case 't':
dest->value.ivalue = (intptr_t)arg;
break;
case 'c': /* Character array. */
case 'z': /* Null-padded string. */
editentry_set(name, (char *)arg, 0);
break;
default:
; /* NOTREACHED */
}
}
static void
editentry_create_desc(void *hook __unused, int letter, void *arg, int count,
char *name)
{
struct editentry *newentry; /* Buffer to hold new entry. */
/* Allocate memory for the new entry and a copy of the entry name. */
if ((newentry = malloc(sizeof(struct editentry))) == NULL ||
(newentry->name = strdup(name)) == NULL)
err(EX_OSERR, NULL);
/* Trim any trailing whitespace for the entry name. */
RTRIM(newentry->name);
newentry->editable = 1;
newentry->type = letter;
newentry->size = count;
newentry->value.svalue = NULL;
STAILQ_INSERT_TAIL(&editlist, newentry, link);
switch (letter) {
case 'i': /* Byte-sized integral type. */
case 'b': /* Bit-sized integral types. */
case 't':
newentry->value.ivalue = (intptr_t)arg;
break;
case 'c': /* Character array. */
case 'z': /* Null-padded string. */
editentry_set(name, (char *)arg, 0);
break;
default:
; /* NOTREACHED */
}
}
static int
editentry_save(void *hook __unused, char *name)
{
struct editentry *src; /* Entry value to save. */
src = editentry_lookup(name);
if (src == 0) {
/*
* This happens if field does not fit into read page size.
* It also means that this field won't be written, so the
* returned value does not really matter.
*/
return (0);
}
switch (src->type) {
case 'i': /* Byte-sized integral type. */
case 'b': /* Bit-sized integral types. */
case 't':
return (src->value.ivalue);
/* NOTREACHED */
case 'c': /* Character array. */
case 'z': /* Null-padded string. */
return ((intptr_t)src->value.svalue);
/* NOTREACHED */
default:
; /* NOTREACHED */
}
return (0); /* This should never happen. */
}
static struct editentry *
editentry_lookup(char *name)
{
struct editentry *scan;
assert(name != NULL);
STAILQ_FOREACH(scan, &editlist, link) {
if (strcasecmp(scan->name, name) == 0)
return (scan);
}
/* Not found during list traversal. */
return (NULL);
}
static int
editentry_set(char *name, char *newvalue, int editonly)
{
struct editentry *dest; /* Modepage entry to update. */
char *cval; /* Pointer to new string value. */
char *convertend; /* End-of-conversion pointer. */
long long ival, newival; /* New integral value. */
int resolution; /* Resolution in bits for integer conversion. */
/*
* Macro to determine the maximum value of the given size for the current
* resolution.
*/
#define RESOLUTION_MAX(size) ((1LL << (resolution * (size))) - 1)
assert(newvalue != NULL);
if (*newvalue == '\0')
return (0); /* Nothing to do. */
if ((dest = editentry_lookup(name)) == NULL)
returnerr(ENOENT);
if (!dest->editable && editonly)
returnerr(EPERM);
switch (dest->type) {
case 'i': /* Byte-sized integral type. */
case 'b': /* Bit-sized integral types. */
case 't':
/* Convert the value string to an integer. */
resolution = (dest->type == 'i')? 8: 1;
ival = strtoll(newvalue, &convertend, 0);
if (*convertend != '\0')
returnerr(EINVAL);
if (ival > RESOLUTION_MAX(dest->size) || ival < 0) {
newival = (ival < 0) ? 0 : RESOLUTION_MAX(dest->size);
warnx("value %lld is out of range for entry %s; "
"clipping to %lld", ival, name, newival);
ival = newival;
}
if (dest->value.ivalue != ival)
editlist_changed = 1;
dest->value.ivalue = ival;
break;
case 'c': /* Character array. */
case 'z': /* Null-padded string. */
if ((cval = malloc(dest->size + 1)) == NULL)
err(EX_OSERR, NULL);
bzero(cval, dest->size + 1);
strncpy(cval, newvalue, dest->size);
if (dest->type == 'z') {
/* Convert trailing spaces to nulls. */
char *convertend2;
for (convertend2 = cval + dest->size;
convertend2 >= cval; convertend2--) {
if (*convertend2 == ' ')
*convertend2 = '\0';
else if (*convertend2 != '\0')
break;
}
}
if (strncmp(dest->value.svalue, cval, dest->size) == 0) {
/* Nothing changed, free the newly allocated string. */
free(cval);
break;
}
if (dest->value.svalue != NULL) {
/* Free the current string buffer. */
free(dest->value.svalue);
dest->value.svalue = NULL;
}
dest->value.svalue = cval;
editlist_changed = 1;
break;
default:
; /* NOTREACHED */
}
return (0);
#undef RESOLUTION_MAX
}
static void
nameentry_create(int page, int subpage, char *name) {
struct pagename *newentry;
if (page < 0 || subpage < 0 || name == NULL || name[0] == '\0')
return;
/* Allocate memory for the new entry and a copy of the entry name. */
if ((newentry = malloc(sizeof(struct pagename))) == NULL ||
(newentry->name = strdup(name)) == NULL)
err(EX_OSERR, NULL);
/* Trim any trailing whitespace for the page name. */
RTRIM(newentry->name);
newentry->page = page;
newentry->subpage = subpage;
SLIST_INSERT_HEAD(&namelist, newentry, link);
}
static struct pagename *
nameentry_lookup(int page, int subpage) {
struct pagename *scan;
SLIST_FOREACH(scan, &namelist, link) {
if (page == scan->page && subpage == scan->subpage)
return (scan);
}
/* Not found during list traversal. */
return (NULL);
}
static int
load_format(const char *pagedb_path, int lpage, int lsubpage)
{
FILE *pagedb;
char str_page[MAX_PAGENUM_LEN];
char *str_subpage;
char str_pagename[MAX_PAGENAME_LEN];
int page;
int subpage;
int depth; /* Quoting depth. */
int found;
int lineno;
enum { LOCATE, PAGENAME, PAGEDEF } state;
int ch;
char c;
#define SETSTATE_LOCATE do { \
str_page[0] = '\0'; \
str_pagename[0] = '\0'; \
page = -1; \
subpage = -1; \
state = LOCATE; \
} while (0)
#define SETSTATE_PAGENAME do { \
str_pagename[0] = '\0'; \
state = PAGENAME; \
} while (0)
#define SETSTATE_PAGEDEF do { \
format[0] = '\0'; \
state = PAGEDEF; \
} while (0)
#define UPDATE_LINENO do { \
if (c == '\n') \
lineno++; \
} while (0)
#define BUFFERFULL(buffer) (strlen(buffer) + 1 >= sizeof(buffer))
if ((pagedb = fopen(pagedb_path, "r")) == NULL)
returnerr(ENOENT);
SLIST_INIT(&namelist);
c = '\0';
depth = 0;
lineno = 0;
found = 0;
SETSTATE_LOCATE;
while ((ch = fgetc(pagedb)) != EOF) {
/* Keep a line count to make error messages more useful. */
UPDATE_LINENO;
/* Skip over comments anywhere in the mode database. */
if (ch == '#') {
do {
ch = fgetc(pagedb);
} while (ch != '\n' && ch != EOF);
UPDATE_LINENO;
continue;
}
c = ch;
/* Strip out newline characters. */
if (c == '\n')
continue;
/* Keep track of the nesting depth for braces. */
if (c == PAGEDEF_START)
depth++;
else if (c == PAGEDEF_END) {
depth--;
if (depth < 0) {
errx(EX_OSFILE, "%s:%d: %s", pagedb_path,
lineno, "mismatched bracket");
}
}
switch (state) {
case LOCATE:
/*
* Locate the page the user is interested in, skipping
* all others.
*/
if (isspace(c)) {
/* Ignore all whitespace between pages. */
break;
} else if (depth == 0 && c == PAGEENTRY_END) {
/*
* A page entry terminator will reset page
* scanning (useful for assigning names to
* modes without providing a mode definition).
*/
/* Record the name of this page. */
str_subpage = str_page;
strsep(&str_subpage, ",");
page = strtol(str_page, NULL, 0);
if (str_subpage)
subpage = strtol(str_subpage, NULL, 0);
else
subpage = 0;
nameentry_create(page, subpage, str_pagename);
SETSTATE_LOCATE;
} else if (depth == 0 && c == PAGENAME_START) {
SETSTATE_PAGENAME;
} else if (c == PAGEDEF_START) {
str_subpage = str_page;
strsep(&str_subpage, ",");
page = strtol(str_page, NULL, 0);
if (str_subpage)
subpage = strtol(str_subpage, NULL, 0);
else
subpage = 0;
if (depth == 1) {
/* Record the name of this page. */
nameentry_create(page, subpage,
str_pagename);
/*
* Only record the format if this is
* the page we are interested in.
*/
if (lpage == page &&
lsubpage == subpage && !found)
SETSTATE_PAGEDEF;
}
} else if (c == PAGEDEF_END) {
/* Reset the processor state. */
SETSTATE_LOCATE;
} else if (depth == 0 && ! BUFFERFULL(str_page)) {
strncat(str_page, &c, 1);
} else if (depth == 0) {
errx(EX_OSFILE, "%s:%d: %s %zd %s", pagedb_path,
lineno, "page identifier exceeds",
sizeof(str_page) - 1, "characters");
}
break;
case PAGENAME:
if (c == PAGENAME_END) {
/*
* Return to LOCATE state without resetting the
* page number buffer.
*/
state = LOCATE;
} else if (! BUFFERFULL(str_pagename)) {
strncat(str_pagename, &c, 1);
} else {
errx(EX_OSFILE, "%s:%d: %s %zd %s", pagedb_path,
lineno, "page name exceeds",
sizeof(str_page) - 1, "characters");
}
break;
case PAGEDEF:
/*
* Transfer the page definition into a format buffer
* suitable for use with CDB encoding/decoding routines.
*/
if (depth == 0) {
found = 1;
SETSTATE_LOCATE;
} else if (! BUFFERFULL(format)) {
strncat(format, &c, 1);
} else {
errx(EX_OSFILE, "%s:%d: %s %zd %s", pagedb_path,
lineno, "page definition exceeds",
sizeof(format) - 1, "characters");
}
break;
default:
; /* NOTREACHED */
}
/* Repeat processing loop with next character. */
}
if (ferror(pagedb))
err(EX_OSFILE, "%s", pagedb_path);
/* Close the SCSI page database. */
fclose(pagedb);
if (!found) /* Never found a matching page. */
returnerr(ESRCH);
return (0);
}
static void
editlist_populate(struct cam_device *device, int cdb_len, int dbd, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
u_int8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
u_int8_t *mode_pars; /* Pointer to modepage params. */
struct scsi_mode_page_header *mph;
struct scsi_mode_page_header_sp *mphsp;
size_t len;
STAILQ_INIT(&editlist);
/* Fetch changeable values; use to build initial editlist. */
mode_sense(device, &cdb_len, dbd, 0, 1, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
mph = find_mode_page_6(mh);
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
mph = find_mode_page_10(mh);
}
if ((mph->page_code & SMPH_SPF) == 0) {
mode_pars = (uint8_t *)(mph + 1);
len = mph->page_length;
} else {
mphsp = (struct scsi_mode_page_header_sp *)mph;
mode_pars = (uint8_t *)(mphsp + 1);
len = scsi_2btoul(mphsp->page_length);
}
len = MIN(len, sizeof(data) - (mode_pars - data));
/* Decode the value data, creating edit_entries for each value. */
buff_decode_visit(mode_pars, len, format, editentry_create, 0);
/* Fetch the current/saved values; use to set editentry values. */
mode_sense(device, &cdb_len, dbd, 0, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
buff_decode_visit(mode_pars, len, format, editentry_update, 0);
}
static void
editlist_populate_desc(struct cam_device *device, int cdb_len, int llbaa, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
uint8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
uint8_t *desc; /* Pointer to block descriptor. */
char num[8];
struct sbuf sb;
size_t len;
u_int longlba, dlen, i;
STAILQ_INIT(&editlist);
/* Fetch the current/saved values. */
mode_sense(device, &cdb_len, 0, llbaa, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
desc = (uint8_t *)(mh + 1);
len = mh->blk_desc_len;
longlba = 0;
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
desc = (uint8_t *)(mh + 1);
len = scsi_2btoul(mh->blk_desc_len);
longlba = (mh->flags & SMH_LONGLBA) != 0;
}
dlen = longlba ? 16 : 8;
len = MIN(len, sizeof(data) - (desc - data));
sbuf_new(&sb, format, sizeof(format), SBUF_FIXEDLEN);
num[0] = 0;
for (i = 0; i * dlen < len; i++) {
if (i > 0)
snprintf(num, sizeof(num), " %d", i + 1);
if (longlba) {
sbuf_printf(&sb, "{Number of Logical Blocks%s High} i4\n", num);
sbuf_printf(&sb, "{Number of Logical Blocks%s} i4\n", num);
sbuf_cat(&sb, "{Reserved} *i4\n");
sbuf_printf(&sb, "{Logical Block Length%s} i4\n", num);
} else if (device->pd_type == T_DIRECT) {
sbuf_printf(&sb, "{Number of Logical Blocks%s} i4\n", num);
sbuf_cat(&sb, "{Reserved} *i1\n");
sbuf_printf(&sb, "{Logical Block Length%s} i3\n", num);
} else {
sbuf_printf(&sb, "{Density Code%s} i1\n", num);
sbuf_printf(&sb, "{Number of Logical Blocks%s} i3\n", num);
sbuf_cat(&sb, "{Reserved} *i1\n");
sbuf_printf(&sb, "{Logical Block Length%s} i3\n", num);
}
}
sbuf_finish(&sb);
sbuf_delete(&sb);
/* Decode the value data, creating edit_entries for each value. */
buff_decode_visit(desc, len, format, editentry_create_desc, 0);
}
static void
editlist_save(struct cam_device *device, int cdb_len, int dbd, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
u_int8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
u_int8_t *mode_pars; /* Pointer to modepage params. */
struct scsi_mode_page_header *mph;
struct scsi_mode_page_header_sp *mphsp;
size_t len, hlen, mphlen;
/* Make sure that something changed before continuing. */
if (! editlist_changed)
return;
/* Preload the CDB buffer with the current mode page data. */
mode_sense(device, &cdb_len, dbd, 0, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
/* Initial headers & offsets. */
/*
* Tape drives include write protect (WP), Buffered Mode and Speed
* settings in the device-specific parameter. Clearing this
* parameter on a mode select can have the effect of turning off
* write protect or buffered mode, or changing the speed setting of
* the tape drive.
*
* Disks report DPO/FUA support via the device specific parameter
* for MODE SENSE, but the bit is reserved for MODE SELECT. So we
* clear this for disks (and other non-tape devices) to avoid
* potential errors from the target device.
*/
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
hlen = sizeof(*mh);
/* Eliminate block descriptors. */
if (mh->blk_desc_len > 0) {
bcopy(find_mode_page_6(mh), mh + 1,
mh->data_length + 1 - hlen -
mh->blk_desc_len);
mh->blk_desc_len = 0;
}
mh->data_length = 0; /* Reserved for MODE SELECT command. */
if (device->pd_type != T_SEQUENTIAL)
mh->dev_spec = 0; /* See comment above */
mph = find_mode_page_6(mh);
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
hlen = sizeof(*mh);
/* Eliminate block descriptors. */
if (scsi_2btoul(mh->blk_desc_len) > 0) {
bcopy(find_mode_page_10(mh), mh + 1,
scsi_2btoul(mh->data_length) + 1 - hlen -
scsi_2btoul(mh->blk_desc_len));
scsi_ulto2b(0, mh->blk_desc_len);
}
scsi_ulto2b(0, mh->data_length); /* Reserved for MODE SELECT. */
if (device->pd_type != T_SEQUENTIAL)
mh->dev_spec = 0; /* See comment above */
mph = find_mode_page_10(mh);
}
if ((mph->page_code & SMPH_SPF) == 0) {
mphlen = sizeof(*mph);
mode_pars = (uint8_t *)(mph + 1);
len = mph->page_length;
} else {
mphsp = (struct scsi_mode_page_header_sp *)mph;
mphlen = sizeof(*mphsp);
mode_pars = (uint8_t *)(mphsp + 1);
len = scsi_2btoul(mphsp->page_length);
}
len = MIN(len, sizeof(data) - (mode_pars - data));
/* Encode the value data to be passed back to the device. */
buff_encode_visit(mode_pars, len, format, editentry_save, 0);
mph->page_code &= ~SMPH_PS; /* Reserved for MODE SELECT command. */
/*
* Write the changes back to the device. If the user editted control
* page 3 (saved values) then request the changes be permanently
* recorded.
*/
mode_select(device, cdb_len, (pc << PAGE_CTRL_SHIFT == SMS_PAGE_CTRL_SAVED),
task_attr, retries, timeout, data, hlen + mphlen + len);
}
static void
editlist_save_desc(struct cam_device *device, int cdb_len, int llbaa, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
uint8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
uint8_t *desc; /* Pointer to block descriptor. */
size_t len, hlen;
/* Make sure that something changed before continuing. */
if (! editlist_changed)
return;
/* Preload the CDB buffer with the current mode page data. */
mode_sense(device, &cdb_len, 0, llbaa, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
/* Initial headers & offsets. */
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
hlen = sizeof(*mh);
desc = (uint8_t *)(mh + 1);
len = mh->blk_desc_len;
mh->data_length = 0; /* Reserved for MODE SELECT command. */
if (device->pd_type != T_SEQUENTIAL)
mh->dev_spec = 0; /* See comment above */
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
hlen = sizeof(*mh);
desc = (uint8_t *)(mh + 1);
len = scsi_2btoul(mh->blk_desc_len);
scsi_ulto2b(0, mh->data_length); /* Reserved for MODE SELECT. */
if (device->pd_type != T_SEQUENTIAL)
mh->dev_spec = 0; /* See comment above */
}
len = MIN(len, sizeof(data) - (desc - data));
/* Encode the value data to be passed back to the device. */
buff_encode_visit(desc, len, format, editentry_save, 0);
/*
* Write the changes back to the device. If the user editted control
* page 3 (saved values) then request the changes be permanently
* recorded.
*/
mode_select(device, cdb_len, (pc << PAGE_CTRL_SHIFT == SMS_PAGE_CTRL_SAVED),
task_attr, retries, timeout, data, hlen + len);
}
static int
modepage_write(FILE *file, int editonly)
{
struct editentry *scan;
int written = 0;
STAILQ_FOREACH(scan, &editlist, link) {
if (scan->editable || !editonly) {
written++;
if (scan->type == 'c' || scan->type == 'z') {
fprintf(file, "%s: %s\n", scan->name,
scan->value.svalue);
} else {
fprintf(file, "%s: %u\n", scan->name,
scan->value.ivalue);
}
}
}
return (written);
}
static int
modepage_read(FILE *file)
{
char *buffer; /* Pointer to dynamic line buffer. */
char *line; /* Pointer to static fgetln buffer. */
char *name; /* Name portion of the line buffer. */
char *value; /* Value portion of line buffer. */
size_t length; /* Length of static fgetln buffer. */
#define ABORT_READ(message, param) do { \
warnx(message, param); \
free(buffer); \
returnerr(EAGAIN); \
} while (0)
while ((line = fgetln(file, &length)) != NULL) {
/* Trim trailing whitespace (including optional newline). */
while (length > 0 && isspace(line[length - 1]))
length--;
/* Allocate a buffer to hold the line + terminating null. */
if ((buffer = malloc(length + 1)) == NULL)
err(EX_OSERR, NULL);
memcpy(buffer, line, length);
buffer[length] = '\0';
/* Strip out comments. */
if ((value = strchr(buffer, '#')) != NULL)
*value = '\0';
/* The name is first in the buffer. Trim whitespace.*/
name = buffer;
RTRIM(name);
while (isspace(*name))
name++;
/* Skip empty lines. */
if (strlen(name) == 0)
continue;
/* The name ends at the colon; the value starts there. */
if ((value = strrchr(buffer, ':')) == NULL)
ABORT_READ("no value associated with %s", name);
*value = '\0'; /* Null-terminate name. */
value++; /* Value starts afterwards. */
/* Trim leading and trailing whitespace. */
RTRIM(value);
while (isspace(*value))
value++;
/* Make sure there is a value left. */
if (strlen(value) == 0)
ABORT_READ("no value associated with %s", name);
/* Update our in-memory copy of the modepage entry value. */
if (editentry_set(name, value, 1) != 0) {
if (errno == ENOENT) {
/* No entry by the name. */
ABORT_READ("no such modepage entry \"%s\"",
name);
} else if (errno == EINVAL) {
/* Invalid value. */
ABORT_READ("Invalid value for entry \"%s\"",
name);
} else if (errno == ERANGE) {
/* Value out of range for entry type. */
ABORT_READ("value out of range for %s", name);
} else if (errno == EPERM) {
/* Entry is not editable; not fatal. */
warnx("modepage entry \"%s\" is read-only; "
"skipping.", name);
}
}
free(buffer);
}
return (ferror(file)? -1: 0);
#undef ABORT_READ
}
static void
modepage_edit(void)
{
const char *editor;
char *commandline;
int fd;
int written;
if (!isatty(fileno(stdin))) {
/* Not a tty, read changes from stdin. */
modepage_read(stdin);
return;
}
/* Lookup editor to invoke. */
if ((editor = getenv("EDITOR")) == NULL)
editor = DEFAULT_EDITOR;
/* Create temp file for editor to modify. */
if ((fd = mkstemp(edit_path)) == -1)
errx(EX_CANTCREAT, "mkstemp failed");
atexit(cleanup_editfile);
if ((edit_file = fdopen(fd, "w")) == NULL)
err(EX_NOINPUT, "%s", edit_path);
written = modepage_write(edit_file, 1);
fclose(edit_file);
edit_file = NULL;
if (written == 0) {
warnx("no editable entries");
cleanup_editfile();
return;
}
/*
* Allocate memory to hold the command line (the 2 extra characters
* are to hold the argument separator (a space), and the terminating
* null character.
*/
commandline = malloc(strlen(editor) + strlen(edit_path) + 2);
if (commandline == NULL)
err(EX_OSERR, NULL);
sprintf(commandline, "%s %s", editor, edit_path);
/* Invoke the editor on the temp file. */
if (system(commandline) == -1)
err(EX_UNAVAILABLE, "could not invoke %s", editor);
free(commandline);
if ((edit_file = fopen(edit_path, "r")) == NULL)
err(EX_NOINPUT, "%s", edit_path);
/* Read any changes made to the temp file. */
modepage_read(edit_file);
cleanup_editfile();
}
static void
modepage_dump(struct cam_device *device, int cdb_len, int dbd, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
u_int8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
u_int8_t *mode_pars; /* Pointer to modepage params. */
struct scsi_mode_page_header *mph;
struct scsi_mode_page_header_sp *mphsp;
size_t indx, len;
mode_sense(device, &cdb_len, dbd, 0, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
mph = find_mode_page_6(mh);
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
mph = find_mode_page_10(mh);
}
if ((mph->page_code & SMPH_SPF) == 0) {
mode_pars = (uint8_t *)(mph + 1);
len = mph->page_length;
} else {
mphsp = (struct scsi_mode_page_header_sp *)mph;
mode_pars = (uint8_t *)(mphsp + 1);
len = scsi_2btoul(mphsp->page_length);
}
len = MIN(len, sizeof(data) - (mode_pars - data));
/* Print the raw mode page data with newlines each 8 bytes. */
for (indx = 0; indx < len; indx++) {
printf("%02x%c",mode_pars[indx],
(((indx + 1) % 8) == 0) ? '\n' : ' ');
}
putchar('\n');
}
static void
modepage_dump_desc(struct cam_device *device, int cdb_len, int llbaa, int pc,
int page, int subpage, int task_attr, int retries, int timeout)
{
uint8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
uint8_t *desc; /* Pointer to block descriptor. */
size_t indx, len;
mode_sense(device, &cdb_len, 0, llbaa, pc, page, subpage, task_attr,
retries, timeout, data, sizeof(data));
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
desc = (uint8_t *)(mh + 1);
len = mh->blk_desc_len;
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
desc = (uint8_t *)(mh + 1);
len = scsi_2btoul(mh->blk_desc_len);
}
len = MIN(len, sizeof(data) - (desc - data));
/* Print the raw mode page data with newlines each 8 bytes. */
for (indx = 0; indx < len; indx++) {
printf("%02x%c", desc[indx],
(((indx + 1) % 8) == 0) ? '\n' : ' ');
}
putchar('\n');
}
static void
cleanup_editfile(void)
{
if (edit_file == NULL)
return;
if (fclose(edit_file) != 0 || unlink(edit_path) != 0)
warn("%s", edit_path);
edit_file = NULL;
}
void
mode_edit(struct cam_device *device, int cdb_len, int desc, int dbd, int llbaa,
int pc, int page, int subpage, int edit, int binary, int task_attr,
int retry_count, int timeout)
{
const char *pagedb_path; /* Path to modepage database. */
if (binary) {
if (edit)
errx(EX_USAGE, "cannot edit in binary mode.");
} else if (desc) {
editlist_populate_desc(device, cdb_len, llbaa, pc, page,
subpage, task_attr, retry_count, timeout);
} else {
if ((pagedb_path = getenv("SCSI_MODES")) == NULL)
pagedb_path = DEFAULT_SCSI_MODE_DB;
if (load_format(pagedb_path, page, subpage) != 0 &&
(edit || verbose)) {
if (errno == ENOENT) {
/* Modepage database file not found. */
warn("cannot open modepage database \"%s\"",
pagedb_path);
} else if (errno == ESRCH) {
/* Modepage entry not found in database. */
warnx("modepage 0x%02x,0x%02x not found in "
"database \"%s\"", page, subpage,
pagedb_path);
}
/* We can recover in display mode, otherwise we exit. */
if (!edit) {
warnx("reverting to binary display only");
binary = 1;
} else
exit(EX_OSFILE);
}
editlist_populate(device, cdb_len, dbd, pc, page, subpage,
task_attr, retry_count, timeout);
}
if (edit) {
if (pc << PAGE_CTRL_SHIFT != SMS_PAGE_CTRL_CURRENT &&
pc << PAGE_CTRL_SHIFT != SMS_PAGE_CTRL_SAVED)
errx(EX_USAGE, "it only makes sense to edit page 0 "
"(current) or page 3 (saved values)");
modepage_edit();
if (desc) {
editlist_save_desc(device, cdb_len, llbaa, pc, page,
subpage, task_attr, retry_count, timeout);
} else {
editlist_save(device, cdb_len, dbd, pc, page, subpage,
task_attr, retry_count, timeout);
}
} else if (binary || STAILQ_EMPTY(&editlist)) {
/* Display without formatting information. */
if (desc) {
modepage_dump_desc(device, cdb_len, llbaa, pc, page,
subpage, task_attr, retry_count, timeout);
} else {
modepage_dump(device, cdb_len, dbd, pc, page, subpage,
task_attr, retry_count, timeout);
}
} else {
/* Display with format. */
modepage_write(stdout, 0);
}
}
void
mode_list(struct cam_device *device, int cdb_len, int dbd, int pc, int subpages,
int task_attr, int retry_count, int timeout)
{
u_int8_t data[MAX_DATA_SIZE]; /* Buffer to hold mode parameters. */
struct scsi_mode_page_header *mph;
struct scsi_mode_page_header_sp *mphsp;
struct pagename *nameentry;
const char *pagedb_path;
int len, off, page, subpage;
if ((pagedb_path = getenv("SCSI_MODES")) == NULL)
pagedb_path = DEFAULT_SCSI_MODE_DB;
if (load_format(pagedb_path, 0, 0) != 0 && verbose && errno == ENOENT) {
/* Modepage database file not found. */
warn("cannot open modepage database \"%s\"", pagedb_path);
}
/* Build the list of all mode pages by querying the "all pages" page. */
mode_sense(device, &cdb_len, dbd, 0, pc, SMS_ALL_PAGES_PAGE,
subpages ? SMS_SUBPAGE_ALL : 0,
task_attr, retry_count, timeout, data, sizeof(data));
/* Skip block descriptors. */
if (cdb_len == 6) {
struct scsi_mode_header_6 *mh =
(struct scsi_mode_header_6 *)data;
len = mh->data_length;
off = sizeof(*mh) + mh->blk_desc_len;
} else {
struct scsi_mode_header_10 *mh =
(struct scsi_mode_header_10 *)data;
len = scsi_2btoul(mh->data_length);
off = sizeof(*mh) + scsi_2btoul(mh->blk_desc_len);
}
/* Iterate through the pages in the reply. */
while (off < len) {
/* Locate the next mode page header. */
mph = (struct scsi_mode_page_header *)(data + off);
if ((mph->page_code & SMPH_SPF) == 0) {
page = mph->page_code & SMS_PAGE_CODE;
subpage = 0;
off += sizeof(*mph) + mph->page_length;
} else {
mphsp = (struct scsi_mode_page_header_sp *)mph;
page = mphsp->page_code & SMS_PAGE_CODE;
subpage = mphsp->subpage;
off += sizeof(*mphsp) + scsi_2btoul(mphsp->page_length);
}
nameentry = nameentry_lookup(page, subpage);
if (subpage == 0) {
printf("0x%02x\t%s\n", page,
nameentry ? nameentry->name : "");
} else {
printf("0x%02x,0x%02x\t%s\n", page, subpage,
nameentry ? nameentry->name : "");
}
}
}
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