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libburn/libburn/sg-freebsd.c

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/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* >>> ts A61021 : for testing the new arrangement of code
please outcomment these defines : */
/* Keeps alive old enumerate_common(). New version delegates much work
to methods in drive, mmc, spc, and sbc .
*/
#define Scsi_freebsd_make_own_enumeratE 1
/* Keeps alive old sg_enumerate(). New version delegates most work to
sg_give_next_adr().
*/
#define Scsi_freebsd_old_sg_enumeratE 1
#include <assert.h>
#include <errno.h>
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <stdlib.h>
#include <string.h>
#include <sys/poll.h>
#include <camlib.h>
#include <cam/scsi/scsi_message.h>
#include <cam/scsi/scsi_pass.h>
#include <err.h> /* XXX */
#include "transport.h"
#include "drive.h"
#include "sg.h"
#include "spc.h"
#include "mmc.h"
#include "sbc.h"
#include "debug.h"
#include "toc.h"
#include "util.h"
#include "libdax_msgs.h"
extern struct libdax_msgs *libdax_messenger;
static void enumerate_common(char *fname, int bus_no, int host_no,
int channel_no, int target_no, int lun_no);
/* ts A51221 */
int burn_drive_is_banned(char *device_address);
/* ts A60821
<<< debug: for tracing calls which might use open drive fds */
int mmc_function_spy(char * text);
#ifdef Scsi_freebsd_old_sg_enumeratE
int sg_give_next_adr(burn_drive_enumerator_t *idx,
char adr[], int adr_size, int initialize)
{
return (0);
}
int sg_is_enumerable_adr(char* adr)
{
return (0);
}
int sg_obtain_scsi_adr(char *path, int *bus_no, int *host_no, int *channel_no,
int *target_no, int *lun_no)
{
return (0);
}
#else /* Scsi_freebsd_old_sg_enumeratE */
/* ts A61021 : Moved most code from sg_enumerate under sg_give_next_adr() */
/* Some helper functions for sg_give_next_adr() */
static int sg_init_enumerator(burn_drive_enumerator_t *idx)
{
idx->skip_device = 0;
if ((idx->fd = open(XPT_DEVICE, O_RDWR)) == -1) {
warn("couldn't open %s", XPT_DEVICE);
return -1;
}
bzero(&(idx->ccb), sizeof(union ccb));
idx->ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
idx->ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
idx->ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
idx->ccb.ccb_h.func_code = XPT_DEV_MATCH;
idx->bufsize = sizeof(struct dev_match_result) * 100;
idx->ccb.cdm.match_buf_len = idx->bufsize;
idx->ccb.cdm.matches = (struct dev_match_result *)malloc(idx->bufsize);
if (idx->ccb.cdm.matches == NULL) {
warnx("can't malloc memory for matches");
close(idx->fd);
return -1;
}
idx->ccb.cdm.num_matches = 0;
idx->i = idx->ccb.cdm.num_matches; /* to trigger buffer load */
/*
* We fetch all nodes, since we display most of them in the default
* case, and all in the verbose case.
*/
idx->ccb.cdm.num_patterns = 0;
idx->ccb.cdm.pattern_buf_len = 0;
return 1;
}
static int sg_next_enumeration_buffer(burn_drive_enumerator_t *idx)
{
/*
* We do the ioctl multiple times if necessary, in case there are
* more than 100 nodes in the EDT.
*/
if (ioctl(idx->fd, CAMIOCOMMAND, &(idx->ccb)) == -1) {
warn("error sending CAMIOCOMMAND ioctl");
return -1;
}
if ((idx->ccb.ccb_h.status != CAM_REQ_CMP)
|| ((idx->ccb.cdm.status != CAM_DEV_MATCH_LAST)
&& (idx->ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
warnx("got CAM error %#x, CDM error %d\n",
idx->ccb.ccb_h.status, idx->ccb.cdm.status);
return -1;
}
return 1;
}
/** Returns the next index number and the next enumerated drive address.
@param idx An opaque handle. Make no own theories about it.
@param adr Takes the reply
@param adr_size Gives maximum size of reply including final 0
@param initialize 1 = start new,
0 = continue, use no other values for now
-1 = finish
@return 1 = reply is a valid address , 0 = no further address available
-1 = severe error (e.g. adr_size too small)
*/
int sg_give_next_adr(burn_drive_enumerator_t *idx,
char adr[], int adr_size, int initialize)
{
int ret;
if (initialize == 1) {
ret = sg_init_enumerator(idx);
if (ret<=0)
return ret;
} else if (initialize == -1) {
if(idx->fd != -1)
close(idx->fd);
idx->fd = -1;
return 0;
}
try_item:; /* This spaghetti loop keeps the number of tabs small */
/* Loop content from old sg_enumerate() */
while (idx->i >= idx->ccb.cdm.num_matches) {
ret = sg_next_enumeration_buffer(idx);
if (ret<=0)
return -1;
if (!((idx->ccb.ccb_h.status == CAM_REQ_CMP)
&& (idx->ccb.cdm.status == CAM_DEV_MATCH_MORE)) )
return 0;
idx->i = 0;
}
switch (idx->ccb.cdm.matches[idx->i].type) {
case DEV_MATCH_BUS:
break;
case DEV_MATCH_DEVICE: {
struct device_match_result* result;
result = &(idx->ccb.cdm.matches[i].result.device_result);
if (result->flags & DEV_RESULT_UNCONFIGURED)
idx->skip_device = 1;
else
idx->skip_device = 0;
break;
}
case DEV_MATCH_PERIPH: {
struct periph_match_result* result;
char buf[64];
result = &(idx->ccb.cdm.matches[i].result.periph_result);
if (idx->skip_device ||
strcmp(result->periph_name, "pass") == 0)
break;
snprintf(buf, sizeof (buf), "/dev/%s%d",
result->periph_name, result->unit_number);
if(adr_size <= strlen(buf)
return -1;
strcpy(adr, buf);
/* Found next enumerable address */
return 1;
}
default:
/* printf(stderr, "unknown match type\n"); */
break;
}
(idx->i)++;
goto try_item; /* Regular function exit is return 1 above */
}
int sg_is_enumerable_adr(char* adr)
{
burn_drive_enumerator_t idx;
int initialize = 1;
char buf[64];
while(1) {
ret = sg_give_next_adr(&idx, buf, sizeof(buf), initialize);
initialize = 0;
if (ret <= 0)
break;
if (strcmp(adr, buf) == 0) {
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
return 1;
}
}
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
return (0);
}
/** Try to obtain SCSI address parameters.
@return 1 is success , 0 is failure
*/
int sg_obtain_scsi_adr(char *path, int *bus_no, int *host_no, int *channel_no,
int *target_no, int *lun_no)
{
burn_drive_enumerator_t idx;
int initialize = 1;
char buf[64];
struct periph_match_result* result;
while(1) {
ret = sg_give_next_adr(&idx, buf, sizeof(buf), initialize);
initialize = 0;
if (ret <= 0)
break;
if (strcmp(adr, buf) != 0)
continue;
result = &(idx->ccb.cdm.matches[i].result.periph_result);
*bus_no = result->path_id;
*host_no = result->path_id;
*channel_no = 0;
*target_no = result->target_id
*lun_no = result->target_lun;
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
return 1;
}
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
return (0);
}
#endif /* ! Scsi_freebsd_old_sg_enumeratE */
int sg_close_drive(struct burn_drive * d)
{
if (d->cam != NULL) {
cam_close_device(d->cam);
d->cam = NULL;
}
return 0;
}
int sg_drive_is_open(struct burn_drive * d)
{
return (d->cam != NULL);
}
void ata_enumerate(void)
{
/* ts A61021: Only a dummy function is needed in FreeBSD */
/* The difference between sg and ata should be encapsulated
in sg-linux.c */
;
}
void sg_enumerate(void)
{
#ifdef Scsi_freebsd_old_sg_enumeratE
union ccb ccb;
int bufsize, fd;
unsigned int i;
int skip_device = 0;
if ((fd = open(XPT_DEVICE, O_RDWR)) == -1) {
warn("couldn't open %s", XPT_DEVICE);
return;
}
bzero(&ccb, sizeof(union ccb));
ccb.ccb_h.path_id = CAM_XPT_PATH_ID;
ccb.ccb_h.target_id = CAM_TARGET_WILDCARD;
ccb.ccb_h.target_lun = CAM_LUN_WILDCARD;
ccb.ccb_h.func_code = XPT_DEV_MATCH;
bufsize = sizeof(struct dev_match_result) * 100;
ccb.cdm.match_buf_len = bufsize;
ccb.cdm.matches = (struct dev_match_result *)malloc(bufsize);
if (ccb.cdm.matches == NULL) {
warnx("can't malloc memory for matches");
close(fd);
return;
}
ccb.cdm.num_matches = 0;
/*
* We fetch all nodes, since we display most of them in the default
* case, and all in the verbose case.
*/
ccb.cdm.num_patterns = 0;
ccb.cdm.pattern_buf_len = 0;
/*
* We do the ioctl multiple times if necessary, in case there are
* more than 100 nodes in the EDT.
*/
do {
if (ioctl(fd, CAMIOCOMMAND, &ccb) == -1) {
warn("error sending CAMIOCOMMAND ioctl");
break;
}
if ((ccb.ccb_h.status != CAM_REQ_CMP)
|| ((ccb.cdm.status != CAM_DEV_MATCH_LAST)
&& (ccb.cdm.status != CAM_DEV_MATCH_MORE))) {
warnx("got CAM error %#x, CDM error %d\n",
ccb.ccb_h.status, ccb.cdm.status);
break;
}
for (i = 0; i < ccb.cdm.num_matches; i++) {
switch (ccb.cdm.matches[i].type) {
case DEV_MATCH_BUS:
break;
case DEV_MATCH_DEVICE: {
struct device_match_result* result;
result = &ccb.cdm.matches[i].result.device_result;
if (result->flags & DEV_RESULT_UNCONFIGURED)
skip_device = 1;
else
skip_device = 0;
break;
}
case DEV_MATCH_PERIPH: {
struct periph_match_result* result;
char buf[64];
result = &ccb.cdm.matches[i].result.periph_result;
if (skip_device || strcmp(result->periph_name, "pass") == 0)
break;
snprintf(buf, sizeof (buf), "/dev/%s%d", result->periph_name, result->unit_number);
/* ts A51221 */
if (burn_drive_is_banned(buf))
break;
enumerate_common(buf, result->path_id, result->path_id, 0,
result->target_id, result->target_lun);
break;
}
default:
fprintf(stdout, "unknown match type\n");
break;
}
}
} while ((ccb.ccb_h.status == CAM_REQ_CMP)
&& (ccb.cdm.status == CAM_DEV_MATCH_MORE));
close(fd);
#else /* Scsi_freebsd_old_sg_enumeratE */
burn_drive_enumerator_t idx;
int initialize = 1;
char buf[64];
while(1) {
ret = sg_give_next_adr(&idx, buf, sizeof(buf), initialize);
initialize = 0;
if (ret <= 0)
break;
if (burn_drive_is_banned(buf))
continue;
enumerate_common(buf, idx.result->path_id, idx.result->path_id,
0, idx.result->target_id,
idx.result->target_lun);
}
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
#endif /* ! Scsi_freebsd_old_sg_enumeratE */
}
#ifdef Scsi_freebsd_make_own_enumeratE
/* ts A61021: The old version which mixes SCSI and operating system adapter
*/
static void enumerate_common(char *fname, int bus_no, int host_no,
int channel_no, int target_no, int lun_no)
{
struct burn_drive *t;
struct burn_drive out;
/* ts A60923 */
out.bus_no = bus_no;
out.host = host_no;
out.id = target_no;
out.channel = channel_no;
out.lun = lun_no;
out.devname = burn_strdup(fname);
out.cam = NULL;
out.start_lba= -2000000000;
out.end_lba= -2000000000;
out.read_atip = mmc_read_atip;
out.grab = sg_grab;
out.release = sg_release;
out.drive_is_open= sg_drive_is_open;
out.issue_command = sg_issue_command;
out.getcaps = spc_getcaps;
out.released = 1;
out.status = BURN_DISC_UNREADY;
out.eject = sbc_eject;
out.load = sbc_load;
out.lock = spc_prevent;
out.unlock = spc_allow;
out.read_disc_info = spc_sense_write_params;
out.get_erase_progress = spc_get_erase_progress;
out.test_unit_ready = spc_test_unit_ready;
out.probe_write_modes = spc_probe_write_modes;
out.read_toc = mmc_read_toc;
out.write = mmc_write;
out.erase = mmc_erase;
out.read_sectors = mmc_read_sectors;
out.perform_opc = mmc_perform_opc;
out.set_speed = mmc_set_speed;
out.send_parameters = spc_select_error_params;
out.send_write_parameters = spc_select_write_params;
out.send_cue_sheet = mmc_send_cue_sheet;
out.sync_cache = mmc_sync_cache;
out.get_nwa = mmc_get_nwa;
out.close_disc = mmc_close_disc;
out.close_session = mmc_close_session;
out.read_buffer_capacity = mmc_read_buffer_capacity;
out.idata = malloc(sizeof(struct burn_scsi_inquiry_data));
out.idata->valid = 0;
out.mdata = malloc(sizeof(struct scsi_mode_data));
out.mdata->valid = 0;
if (out.idata == NULL || out.mdata == NULL) {
libdax_msgs_submit(libdax_messenger, -1, 0x00020108,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Could not allocate new drive object", 0, 0);
return;
}
memset(&out.params, 0, sizeof(struct params));
t = burn_drive_register(&out);
/* ts A60821
<<< debug: for tracing calls which might use open drive fds */
mmc_function_spy("enumerate_common : -------- doing grab");
/* try to get the drive info */
if (t->grab(t)) {
burn_print(2, "getting drive info\n");
t->getcaps(t);
t->unlock(t);
t->released = 1;
} else {
burn_print(2, "unable to grab new located drive\n");
}
/* ts A60821
<<< debug: for tracing calls which might use open drive fds */
mmc_function_spy("enumerate_common : ----- would release ");
}
#else /* Scsi_freebsd_make_own_enumeratE */
/* The new, more concise version of enumerate_common */
static void enumerate_common(char *fname, int bus_no, int host_no,
int channel_no, int target_no, int lun_no)
{
int ret;
struct burn_drive out;
/* General libburn drive setup */
burn_setup_drive(&out, fname);
/* This transport adapter uses SCSI-family commands and models
(seems the adapter would know better than its boss, if ever) */
ret = burn_scsi_setup_drive(&out, bus_no, host_no, channel_no,
target_no, lun_no, 0);
if (ret<=0)
return;
/* Operating system adapter is CAM */
/* Adapter specific handles and data */
out.cam = NULL;
/* Adapter specific functions */
out.grab = sg_grab;
out.release = sg_release;
out.drive_is_open = sg_drive_is_open;
out.issue_command = sg_issue_command;
/* Finally register drive and inquire drive information */
burn_drive_finish_enum(&out);
}
#endif /* ! Scsi_freebsd_make_own_enumeratE */
/* ts A61021: do not believe this:
we use the sg reference count to decide whether we can use the
drive or not.
if refcount is not one, drive is open somewhere else.
*/
int sg_grab(struct burn_drive *d)
{
int count;
struct cam_device *cam;
mmc_function_spy("sg_grab");
assert(d->cam == NULL);
cam = cam_open_device(d->devname, O_RDWR);
if (cam == NULL) {
libdax_msgs_submit(libdax_messenger, d->global_index, 0x00020003,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Could not grab drive", 0/*os_errno*/, 0);
return 0;
}
/* er = ioctl(fd, SG_GET_ACCESS_COUNT, &count);*/
count = 1;
if (1 == count) {
d->cam = cam;
fcntl(cam->fd, F_SETOWN, getpid());
d->released = 0;
return 1;
}
burn_print(1, "could not acquire drive - already open\n");
sg_close_drive(d);
return 0;
}
/*
non zero return means you still have the drive and it's not
in a state to be released? (is that even possible?)
*/
int sg_release(struct burn_drive *d)
{
mmc_function_spy("sg_release");
if (d->cam == NULL) {
burn_print(1, "release an ungrabbed drive. die\n");
return 0;
}
mmc_function_spy("sg_release ----------- closing.");
sg_close_drive(d);
return 0;
}
int sg_issue_command(struct burn_drive *d, struct command *c)
{
int done = 0;
int err;
union ccb *ccb;
char buf[161];
snprintf(buf, sizeof (buf), "sg_issue_command d->cam=%p d->released=%d",
(void*)d->cam, d->released);
mmc_function_spy(buf);
if (d->cam == NULL) {
c->error = 0;
return 0;
}
c->error = 0;
ccb = cam_getccb(d->cam);
cam_fill_csio(&ccb->csio,
1, /* retries */
NULL, /* cbfncp */
CAM_DEV_QFRZDIS, /* flags */
MSG_SIMPLE_Q_TAG, /* tag_action */
NULL, /* data_ptr */
0, /* dxfer_len */
sizeof (ccb->csio.sense_data), /* sense_len */
0, /* cdb_len */
30*1000); /* timeout */
switch (c->dir) {
case TO_DRIVE:
ccb->csio.ccb_h.flags |= CAM_DIR_OUT;
break;
case FROM_DRIVE:
ccb->csio.ccb_h.flags |= CAM_DIR_IN;
break;
case NO_TRANSFER:
ccb->csio.ccb_h.flags |= CAM_DIR_NONE;
break;
}
ccb->csio.cdb_len = c->oplen;
memcpy(&ccb->csio.cdb_io.cdb_bytes, &c->opcode, c->oplen);
memset(&ccb->csio.sense_data, 0, sizeof (ccb->csio.sense_data));
if (c->page) {
ccb->csio.data_ptr = c->page->data;
if (c->dir == FROM_DRIVE) {
ccb->csio.dxfer_len = BUFFER_SIZE;
/* touch page so we can use valgrind */
memset(c->page->data, 0, BUFFER_SIZE);
} else {
assert(c->page->bytes > 0);
ccb->csio.dxfer_len = c->page->bytes;
}
} else {
ccb->csio.data_ptr = NULL;
ccb->csio.dxfer_len = 0;
}
do {
err = cam_send_ccb(d->cam, ccb);
if (err == -1) {
libdax_msgs_submit(libdax_messenger,
d->global_index, 0x0002010c,
LIBDAX_MSGS_SEV_FATAL, LIBDAX_MSGS_PRIO_HIGH,
"Failed to transfer command to drive",
errno, 0);
cam_freeccb(ccb);
sg_close_drive(d);
d->released = 1;
d->busy = BURN_DRIVE_IDLE;
c->error = 1;
return -1;
}
/* XXX */
memcpy(c->sense, &ccb->csio.sense_data, ccb->csio.sense_len);
if ((ccb->ccb_h.status & CAM_STATUS_MASK) != CAM_REQ_CMP) {
if (!c->retry) {
c->error = 1;
cam_freeccb(ccb);
return 1;
}
switch (scsi_error(d, c->sense, 0)) {
case RETRY:
done = 0;
break;
case FAIL:
done = 1;
c->error = 1;
break;
}
} else {
done = 1;
}
} while (!done);
cam_freeccb(ccb);
return 1;
}
enum response scsi_error(struct burn_drive *d, unsigned char *sense,
int senselen)
{
int key, asc, ascq;
senselen = senselen;
key = sense[2];
asc = sense[12];
ascq = sense[13];
burn_print(12, "CONDITION: 0x%x 0x%x 0x%x on %s %s\n",
key, asc, ascq, d->idata->vendor, d->idata->product);
switch (asc) {
case 0:
burn_print(12, "NO ERROR!\n");
return RETRY;
case 2:
burn_print(1, "not ready\n");
return RETRY;
case 4:
burn_print(1,
"logical unit is in the process of becoming ready\n");
return RETRY;
case 0x20:
if (key == 5)
burn_print(1, "bad opcode\n");
return FAIL;
case 0x21:
burn_print(1, "invalid address or something\n");
return FAIL;
case 0x24:
if (key == 5)
burn_print(1, "invalid field in cdb\n");
else
break;
return FAIL;
case 0x26:
if (key == 5)
burn_print( 1, "invalid field in parameter list\n" );
return FAIL;
case 0x28:
if (key == 6)
burn_print(1,
"Not ready to ready change, medium may have changed\n");
else
break;
return RETRY;
case 0x3A:
burn_print(12, "Medium not present in %s %s\n",
d->idata->vendor, d->idata->product);
d->status = BURN_DISC_EMPTY;
return FAIL;
}
burn_print(1, "unknown failure\n");
burn_print(1, "key:0x%x, asc:0x%x, ascq:0x%x\n", key, asc, ascq);
return FAIL;
}
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