Made portability clarifications

ZeroThreeEight
Thomas Schmitt 16 years ago
parent 595b877a24
commit 13641fcbae
  1. 2
      cdrskin/cdrskin_timestamp.h
  2. 8
      libburn/drive.c
  3. 541
      libburn/sg-freebsd-port.c
  4. 100
      libburn/sg-freebsd.c
  5. 600
      libburn/sg-linux.c
  6. 35
      libburn/sg.h
  7. 106
      libburn/spc.c
  8. 8
      libburn/spc.h

@ -1 +1 @@
#define Cdrskin_timestamP "2006.11.15.091329"
#define Cdrskin_timestamP "2006.11.15.170927"

@ -52,7 +52,7 @@ void burn_drive_free(struct burn_drive *d)
return;
/* ts A60822 : close open fds before forgetting them */
if (burn_drive_is_open(d))
sg_close_drive(d);
d->release(d);
free((void *) d->idata);
free((void *) d->mdata);
if(d->toc_entry != NULL)
@ -578,8 +578,10 @@ int burn_drive_scan_sync(struct burn_drive_info *drives[],
#endif /* 0 */
/* refresh the lib's drives */
sg_enumerate();
ata_enumerate();
/* ts A61115 : formerly sg_enumerate(); ata_enumerate(); */
scsi_enumerate_drives();
count = burn_drive_count();
if (count)
*drives =

@ -0,0 +1,541 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/*
This is the operating system dependent part of libburn. It implements the
transport level aspects of SCSI control and command i/o.
Present implementation: FreeBSD CAM (untested)
PORTING:
There are public functions, used by other parts of libburn, which have to be
implemented in a way that provides libburn with the desired services:
sg_give_next_adr() iterates over the set of potentially useful drive
address strings.
scsi_enumerate_drives() brings all available, not-whitelist-banned, and
accessible drives into libburn's list of drives.
sg_drive_is_open() tells wether libburn has the given drive in use.
sg_grab() opens the drive for SCSI commands and ensures
undisturbed access.
sg_release() closes a drive opened by sg_grab()
sg_issue_command() sends a SCSI command to the drive, receives reply,
and evaluates wether the command succeeded or shall
be retried or finally failed.
sg_obtain_scsi_adr() tries to obtain SCSI address parameters.
Porting hints are marked by the text "PORTING:".
Send feedback to libburn-hackers@pykix.org .
*/
/** PORTING : ------- OS dependent headers and definitions ------ */
#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 */
/** PORTING : ------ libburn portable headers and definitions ----- */
#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;
/* is in portable part of libburn */
int burn_drive_is_banned(char *device_address);
/* ------------------------------------------------------------------------ */
/* ts A61115: Private functions. Port only if needed by public functions */
/* (Public functions are listed below) */
/* ------------------------------------------------------------------------ */
/* Helper function for scsi_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;
}
/* Helper function for scsi_give_next_adr() */
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;
}
static int sg_close_drive(struct burn_drive * d)
{
if (d->cam != NULL) {
cam_close_device(d->cam);
d->cam = NULL;
}
return 0;
}
/* ----------------------------------------------------------------------- */
/* PORTING: Private functions which contain publicly needed functionality. */
/* Their portable part must be performed. So it is probably best */
/* to replace the non-portable part and to call these functions */
/* in your port, too. */
/* ----------------------------------------------------------------------- */
/** Wraps a detected drive into libburn structures and hands it over to
libburn drive list.
*/
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;
/* PORTING: ------------------- non portable part --------------- */
/* 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;
/* PORTING: ---------------- end of non portable part ------------ */
/* Finally register drive and inquire drive information */
burn_drive_finish_enum(&out);
}
/* ts A61115 */
/* ------------------------------------------------------------------------ */
/* PORTING: Public functions. These MUST be ported. */
/* ------------------------------------------------------------------------ */
/** Returns the next index number and the next enumerated drive address.
The enumeration has to cover all available and accessible drives. It is
allowed to return addresses of drives which are not available but under
some (even exotic) circumstances could be available. It is on the other
hand allowed, only to hand out addresses which can really be used right
in the moment of this call. (This implementation chooses the latter.)
@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 scsi_enumerate_drives() */
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 */
}
/** Brings all available, not-whitelist-banned, and accessible drives into
libburn's list of drives.
*/
int scsi_enumerate_drives(void)
{
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);
}
/** Tells wether libburn has the given drive in use or exclusively reserved.
If it is "open" then libburn will eventually call sg_release() on it when
it is time to give up usage resp. reservation.
*/
/** Published as burn_drive.drive_is_open() */
int sg_drive_is_open(struct burn_drive * d)
{
return (d->cam != NULL);
}
/** Opens the drive for SCSI commands and - if burn activities are prone
to external interference on your system - obtains an exclusive access lock
on the drive. (Note: this is not physical tray locking.)
A drive that has been opened with sg_grab() will eventually be handed
over to sg_release() for closing and unreserving.
*/
int sg_grab(struct burn_drive *d)
{
int count;
struct cam_device *cam;
if(d->cam != NULL)
return 0;
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;
}
d->cam = cam;
fcntl(cam->fd, F_SETOWN, getpid());
d->released = 0;
return 1;
}
/** PORTING: Is mainly about the call to sg_close_drive() and wether it
implements the demanded functionality.
*/
/** Gives up the drive for SCSI commands and releases eventual access locks.
(Note: this is not physical tray locking.)
*/
int sg_release(struct burn_drive *d)
{
if (d->cam == NULL) {
burn_print(1, "release an ungrabbed drive. die\n");
return 0;
}
sg_close_drive(d);
return 0;
}
/** Sends a SCSI command to the drive, receives reply and evaluates wether
the command succeeded or shall be retried or finally failed.
Returned SCSI errors shall not lead to a return value indicating failure.
The callers get notified by c->error. An SCSI failure which leads not to
a retry shall be notified via scsi_notify_error().
The Libburn_log_sg_commandS facility might be of help when problems with
a drive have to be examined. It shall stay disabled for normal use.
@return: 1 success , <=0 failure
*/
int sg_issue_command(struct burn_drive *d, struct command *c)
{
int done = 0;
int err;
union ccb *ccb;
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 {
/* ts A61115: removed a ssert() */
if(c->page->bytes <= 0)
return 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;
}
/** Tries 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);
}
/** Tells wether a text is a persistent address as listed by the enumeration
functions.
*/
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);
}

@ -1,19 +1,17 @@
/* -*- 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
/* Revives 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
/* Revives old scsi_enumerate_drives(). New version delegates most work to
sg_give_next_adr().
*/
#define Scsi_freebsd_old_sg_enumeratE 1
#define Scsi_freebsd_old_scsi_enumeratE 1
#include <assert.h>
@ -59,7 +57,7 @@ int burn_drive_is_banned(char *device_address);
int mmc_function_spy(char * text);
#ifdef Scsi_freebsd_old_sg_enumeratE
#ifdef Scsi_freebsd_old_scsi_enumeratE
int sg_give_next_adr(burn_drive_enumerator_t *idx,
char adr[], int adr_size, int initialize)
@ -78,10 +76,11 @@ int sg_obtain_scsi_adr(char *path, int *bus_no, int *host_no, int *channel_no,
return (0);
}
#else /* Scsi_freebsd_old_sg_enumeratE */
#else /* Scsi_freebsd_old_scsi_enumeratE */
/* ts A61021 : Moved most code from sg_enumerate under sg_give_next_adr() */
/* Some helper functions for sg_give_next_adr() */
/* ts A61021 : Moved most code from scsi_enumerate_drives under
sg_give_next_adr() */
/* Some helper functions for scsi_give_next_adr() */
static int sg_init_enumerator(burn_drive_enumerator_t *idx)
{
@ -172,7 +171,7 @@ int sg_give_next_adr(burn_drive_enumerator_t *idx,
try_item:; /* This spaghetti loop keeps the number of tabs small */
/* Loop content from old sg_enumerate() */
/* Loop content from old scsi_enumerate_drives() */
while (idx->i >= idx->ccb.cdm.num_matches) {
ret = sg_next_enumeration_buffer(idx);
@ -277,7 +276,7 @@ int sg_obtain_scsi_adr(char *path, int *bus_no, int *host_no, int *channel_no,
return (0);
}
#endif /* ! Scsi_freebsd_old_sg_enumeratE */
#endif /* ! Scsi_freebsd_old_scsi_enumeratE */
int sg_close_drive(struct burn_drive * d)
@ -294,20 +293,10 @@ int sg_drive_is_open(struct burn_drive * d)
return (d->cam != NULL);
}
void ata_enumerate(void)
int scsi_enumerate_drives(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
#ifdef Scsi_freebsd_old_scsi_enumeratE
union ccb ccb;
int bufsize, fd;
@ -404,7 +393,7 @@ void sg_enumerate(void)
close(fd);
#else /* Scsi_freebsd_old_sg_enumeratE */
#else /* Scsi_freebsd_old_scsi_enumeratE */
burn_drive_enumerator_t idx;
int initialize = 1;
@ -423,7 +412,7 @@ void sg_enumerate(void)
}
sg_give_next_adr(&idx, buf, sizeof(buf), -1);
#endif /* ! Scsi_freebsd_old_sg_enumeratE */
#endif /* ! Scsi_freebsd_old_scsi_enumeratE */
}
@ -706,64 +695,3 @@ int sg_issue_command(struct burn_drive *d, struct command *c)
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;
}

@ -1,7 +1,45 @@
/* -*- indent-tabs-mode: t; tab-width: 8; c-basic-offset: 8; -*- */
/* ts A61010 */
/* #include <a ssert.h> */
/*
This is the operating system dependent part of libburn. It implements the
transport level aspects of SCSI control and command i/o.
Present implementation: Linux SCSI Generic (sg)
PORTING:
There are public functions, used by other parts of libburn, which have to be
implemented in a way that provides libburn with the desired services:
sg_give_next_adr() iterates over the set of potentially useful drive
address strings.
scsi_enumerate_drives() brings all available, not-whitelist-banned, and
accessible drives into libburn's list of drives.
sg_drive_is_open() tells wether libburn has the given drive in use.
sg_grab() opens the drive for SCSI commands and ensures
undisturbed access.
sg_release() closes a drive opened by sg_grab()
sg_issue_command() sends a SCSI command to the drive, receives reply,
and evaluates wether the command succeeded or shall
be retried or finally failed.
sg_obtain_scsi_adr() tries to obtain SCSI address parameters.
Porting hints are marked by the text "PORTING:".
Send feedback to libburn-hackers@pykix.org .
Hint: You should also look into sg-freebsd-port.c, which is a younger and
in some aspects more straightforward implementation of this interface.
*/
/** PORTING : ------- OS dependent headers and definitions ------ */
#include <errno.h>
#include <unistd.h>
@ -10,9 +48,6 @@
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
/* #include <m alloc.h> ts A61013 : not in Linux man 3 malloc */
#include <string.h>
#include <sys/poll.h>
#include <linux/hdreg.h>
@ -20,6 +55,9 @@
#include <scsi/sg.h>
#include <scsi/scsi.h>
/** PORTING : ------ libburn portable headers and definitions ----- */
#include "transport.h"
#include "drive.h"
#include "sg.h"
@ -30,20 +68,24 @@
#include "toc.h"
#include "util.h"
/* kludge! glibc headers don't define all the SCSI stuff that we use! */
#ifndef SG_GET_ACCESS_COUNT
# define SG_GET_ACCESS_COUNT 0x2289
#endif
#include "libdax_msgs.h"
extern struct libdax_msgs *libdax_messenger;
/* ts A51221 */
int burn_drive_is_banned(char *device_address);
/* ------------------------------------------------------------------------ */
/* PORTING: Private definitions. Port only if needed by public functions. */
/* (Public functions are listed below) */
/* ------------------------------------------------------------------------ */
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 A61115 : this needs mending. A Linux aspect shows up in cdrskin. */
/* ts A60813 : storage objects are in libburn/init.c
wether to use O_EXCL
wether to use O_NOBLOCK with open(2) on devices
@ -58,6 +100,12 @@ extern int burn_sg_open_abort_busy;
int mmc_function_spy(char * text);
/* ------------------------------------------------------------------------ */
/* PORTING: Private functions. Port only if needed by public functions */
/* (Public functions are listed below) */
/* ------------------------------------------------------------------------ */
static int sgio_test(int fd)
{
unsigned char test_ops[] = { 0, 0, 0, 0, 0, 0 };
@ -73,45 +121,8 @@ static int sgio_test(int fd)
}
/* ts A60925 : ticket 74 */
int sg_close_drive_fd(char *fname, int driveno, int *fd, int sorry)
{
int ret, os_errno, sevno= LIBDAX_MSGS_SEV_DEBUG;
char msg[4096+100];
if(*fd < 0)
return(0);
ret = close(*fd);
*fd = -1337;
if(ret != -1)
return 1;
os_errno= errno;
if (fname != NULL)
sprintf(msg, "Encountered error when closing drive '%s'",
fname);
else
sprintf(msg, "Encountered error when closing drive");
if (sorry)
sevno = LIBDAX_MSGS_SEV_SORRY;
libdax_msgs_submit(libdax_messenger, driveno, 0x00020002,
sevno, LIBDAX_MSGS_PRIO_HIGH, msg, os_errno, 0);
return 0;
}
int sg_drive_is_open(struct burn_drive * d)
{
/* a bit more detailed case distinction than needed */
if (d->fd == -1337)
return 0;
if (d->fd < 0)
return 0;
return 1;
}
/* ts A60924 */
int sg_handle_busy_device(char *fname, int os_errno)
static int sg_handle_busy_device(char *fname, int os_errno)
{
char msg[4096];
@ -135,87 +146,8 @@ int sg_handle_busy_device(char *fname, int os_errno)
}
/* ts A60922 ticket 33 */
/** 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)
{
/* sg.h : typedef int burn_drive_enumerator_t; */
static int sg_limit = 32, ata_limit = 26;
int baseno = 0;
if (initialize == -1)
return 0;
if (initialize == 1)
*idx = -1;
(*idx)++;
if (*idx >= sg_limit)
goto next_ata;
if (adr_size < 10)
return -1;
sprintf(adr, "/dev/sg%d", *idx);
return 1;
next_ata:;
baseno += sg_limit;
if (*idx - baseno >= ata_limit)
goto next_nothing;
if (adr_size < 9)
return -1;
sprintf(adr, "/dev/hd%c", 'a' + (*idx - baseno));
return 1;
next_nothing:;
baseno += ata_limit;
return 0;
}
int sg_is_enumerable_adr(char *adr)
{
char fname[4096];
int i, ret = 0, first = 1;
while (1) {
ret= sg_give_next_adr(&i, fname, sizeof(fname), first);
if(ret <= 0)
break;
first = 0;
if (strcmp(adr, fname) == 0)
return 1;
}
return(0);
}
/* ts A60926 */
int sg_release_siblings(int sibling_fds[], int *sibling_count)
{
int i;
char msg[81];
for(i= 0; i < *sibling_count; i++)
sg_close_drive_fd(NULL, -1, &(sibling_fds[i]), 0);
if(*sibling_count > 0) {
sprintf(msg, "Closed %d O_EXCL scsi siblings", *sibling_count);
libdax_msgs_submit(libdax_messenger, -1, 0x00020007,
LIBDAX_MSGS_SEV_NOTE, LIBDAX_MSGS_PRIO_HIGH, msg, 0,0);
}
*sibling_count = 0;
return 1;
}
/* ts A60926 */
int sg_open_drive_fd(char *fname, int scan_mode)
static int sg_open_drive_fd(char *fname, int scan_mode)
{
int open_mode = O_RDWR, fd;
char msg[81];
@ -266,8 +198,67 @@ int sg_open_drive_fd(char *fname, int scan_mode)
}
/* ts A60925 : ticket 74 */
static int sg_close_drive_fd(char *fname, int driveno, int *fd, int sorry)
{
int ret, os_errno, sevno= LIBDAX_MSGS_SEV_DEBUG;
char msg[4096+100];
if(*fd < 0)
return(0);
ret = close(*fd);
*fd = -1337;
if(ret != -1)
return 1;
os_errno= errno;
if (fname != NULL)
sprintf(msg, "Encountered error when closing drive '%s'",
fname);
else
sprintf(msg, "Encountered error when closing drive");
if (sorry)
sevno = LIBDAX_MSGS_SEV_SORRY;
libdax_msgs_submit(libdax_messenger, driveno, 0x00020002,
sevno, LIBDAX_MSGS_PRIO_HIGH, msg, os_errno, 0);
return 0;
}
/* ts A60926 */
int sg_open_scsi_siblings(char *path, int driveno,
static int sg_release_siblings(int sibling_fds[], int *sibling_count)
{
int i;
char msg[81];
for(i= 0; i < *sibling_count; i++)
sg_close_drive_fd(NULL, -1, &(sibling_fds[i]), 0);
if(*sibling_count > 0) {
sprintf(msg, "Closed %d O_EXCL scsi siblings", *sibling_count);
libdax_msgs_submit(libdax_messenger, -1, 0x00020007,
LIBDAX_MSGS_SEV_NOTE, LIBDAX_MSGS_PRIO_HIGH, msg, 0,0);
}
*sibling_count = 0;
return 1;
}
/* ts A60926 */
static int sg_close_drive(struct burn_drive *d)
{
int ret;
if (!burn_drive_is_open(d))
return 0;
sg_release_siblings(d->sibling_fds, &(d->sibling_count));
ret = sg_close_drive_fd(d->devname, d->global_index, &(d->fd), 0);
return ret;
}
/* ts A60926 */
static int sg_open_scsi_siblings(char *path, int driveno,
int sibling_fds[], int *sibling_count,
int host_no, int channel_no, int id_no, int lun_no)
{
@ -324,19 +315,9 @@ failed:;
}
/* ts A60926 */
int sg_close_drive(struct burn_drive *d)
{
int ret;
if (!burn_drive_is_open(d))
return 0;
sg_release_siblings(d->sibling_fds, &(d->sibling_count));
ret = sg_close_drive_fd(d->devname, d->global_index, &(d->fd), 0);
return ret;
}
void ata_enumerate(void)
/** Speciality of Linux: detect non-SCSI ATAPI (EIDE) which will from
then on used used via generic SCSI as is done with (emulated) SCSI drives */
static void ata_enumerate(void)
{
struct hd_driveid tm;
int i, fd;
@ -372,7 +353,9 @@ void ata_enumerate(void)
}
}
void sg_enumerate(void)
/** Detects (probably emulated) SCSI drives */
static void sg_enumerate(void)
{
struct sg_scsi_id sid;
int i, fd, sibling_fds[LIBBURN_SG_MAX_SIBLINGS], sibling_count= 0, ret;
@ -428,6 +411,19 @@ void sg_enumerate(void)
}
}
/* ts A61115 */
/* ----------------------------------------------------------------------- */
/* PORTING: Private functions which contain publicly needed functionality. */
/* Their portable part must be performed. So it is probably best */
/* to replace the non-portable part and to call these functions */
/* in your port, too. */
/* ----------------------------------------------------------------------- */
/** Wraps a detected drive into libburn structures and hands it over to
libburn drive list.
*/
/* ts A60923 - A61005 : introduced new SCSI parameters */
/* ts A61021 : moved non os-specific code to spc,sbc,mmc,drive */
static void enumerate_common(char *fname, int bus_no, int host_no,
@ -446,6 +442,8 @@ static void enumerate_common(char *fname, int bus_no, int host_no,
if (ret<=0)
return;
/* PORTING: ------------------- non portable part --------------- */
/* Operating system adapter is Linux Generic SCSI (sg) */
/* Adapter specific handles and data */
out.fd = -1337;
@ -458,21 +456,122 @@ static void enumerate_common(char *fname, int bus_no, int host_no,
out.drive_is_open= sg_drive_is_open;
out.issue_command = sg_issue_command;
/* PORTING: ---------------- end of non portable part ------------ */
/* Finally register drive and inquire drive information */
burn_drive_finish_enum(&out);
}
/*
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.
ts A60813: this test is too late. O_EXCL is the stronger solution.
After all the test was disabled already in icculus.org/burn CVS.
/* ts A61115 */
/* ------------------------------------------------------------------------ */
/* PORTING: Public functions. These MUST be ported. */
/* ------------------------------------------------------------------------ */
/** PORTING:
In this Linux implementation, this function mirrors the enumeration
done in sg_enumerate and ata_enumerate(). It would be better to base those
functions on this sg_give_next_adr() but the situation is not inviting.
*/
/* ts A60922 ticket 33 : called from drive.c */
/** Returns the next index number and the next enumerated drive address.
The enumeration has to cover all available and accessible drives. It is
allowed to return addresses of drives which are not available but under
some (even exotic) circumstances could be available. It is on the other
hand allowed, only to hand out addresses which can really be used right
in the moment of this call. (This implementation chooses the former.)
@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)
{
/* sg.h : typedef int burn_drive_enumerator_t; */
static int sg_limit = 32, ata_limit = 26;
int baseno = 0;
if (initialize == -1)
return 0;
if (initialize == 1)
*idx = -1;
(*idx)++;
if (*idx >= sg_limit)
goto next_ata;
if (adr_size < 10)
return -1;
sprintf(adr, "/dev/sg%d", *idx);
return 1;
next_ata:;
baseno += sg_limit;
if (*idx - baseno >= ata_limit)
goto next_nothing;
if (adr_size < 9)
return -1;
sprintf(adr, "/dev/hd%c", 'a' + (*idx - baseno));
return 1;
next_nothing:;
baseno += ata_limit;
return 0;
}
/** Brings all available, not-whitelist-banned, and accessible drives into
libburn's list of drives.
*/
/** PORTING:
If not stricken with an incompletely unified situation like in Linux
one would rather implement this by a loop calling sg_give_next_adr().
If needed with your sg_give_next_adr() results, do a test for existence
and accessability. If burn activities are prone to external interference
on your system it is also necessary to obtain exclusive access locks on
the drives.
Hand over each accepted drive to enumerate_common() resp. its replacement
within your port.
See FreeBSD port sketch sg-freebsd-port.c for such an implementation.
*/
/* ts A61115: replacing call to sg-implementation internals from drive.c */
int scsi_enumerate_drives(void)
{
sg_enumerate();
ata_enumerate();
return 1;
}
/** Tells wether libburn has the given drive in use or exclusively reserved.
If it is "open" then libburn will eventually call sg_release() on it when
it is time to give up usage resp. reservation.
*/
/** Published as burn_drive.drive_is_open() */
int sg_drive_is_open(struct burn_drive * d)
{
/* a bit more detailed case distinction than needed */
if (d->fd == -1337)
return 0;
if (d->fd < 0)
return 0;
return 1;
}
/** Opens the drive for SCSI commands and - if burn activities are prone
to external interference on your system - obtains an exclusive access lock
on the drive. (Note: this is not physical tray locking.)
A drive that has been opened with sg_grab() will eventually be handed
over to sg_release() for closing and unreserving.
*/
int sg_grab(struct burn_drive *d)
{
int fd, count, os_errno= 0, ret;
int fd, os_errno= 0, ret;
/* ts A60813 */
int open_mode = O_RDWR;
@ -495,12 +594,11 @@ int sg_grab(struct burn_drive *d)
if(burn_sg_open_o_nonblock)
open_mode |= O_NONBLOCK;
/* ts A60813
/* ts A60813 - A60822
After enumeration the drive fd is probably still open.
-1337 is the initial value of burn_drive.fd and the value after
relase of drive. Unclear why not the official error return
value -1 of open(2) war used. */
/* ts A60822: was if(d->fd == -1337) { */
if(! burn_drive_is_open(d)) {
/* ts A60821
@ -523,49 +621,34 @@ int sg_grab(struct burn_drive *d)
} else
fd= d->fd;
/* ts A61007 : this is redundant */
/* a ssert(fd != -1337); */
if (fd >= 0) {
/* ts A60814:
according to my experiments this test would work now ! */
/* ts A60926 : this was disabled */
/* Tests with growisofs on kernel 2.4.21 yielded that this
does not help against blocking on busy drives.
*/
/* <<< the old dummy */
/* er = ioctl(fd, SG_GET_ACCESS_COUNT, &count);*/
count = 1;
if (1 == count) {
d->fd = fd;
fcntl(fd, F_SETOWN, getpid());
d->released = 0;
return 1;
}
d->fd = fd;
fcntl(fd, F_SETOWN, getpid());
d->released = 0;
return 1;
}
libdax_msgs_submit(libdax_messenger, d->global_index, 0x00020003,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Could not grab drive", os_errno, 0);
return 0;
drive_is_in_use:;
libdax_msgs_submit(libdax_messenger, d->global_index,
libdax_msgs_submit(libdax_messenger, d->global_index,
0x00020003,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Could not grab drive - already in use", 0, 0);
sg_close_drive(d);
d->fd = -1337;
return 0;
}
libdax_msgs_submit(libdax_messenger, d->global_index, 0x00020003,
LIBDAX_MSGS_SEV_SORRY, LIBDAX_MSGS_PRIO_HIGH,
"Could not grab drive", os_errno, 0);
sg_close_drive(d);
d->fd = -1337;
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?)
*/
/** PORTING: Is mainly about the call to sg_close_drive() and wether it
implements the demanded functionality.
*/
/** Gives up the drive for SCSI commands and releases eventual access locks.
(Note: this is not physical tray locking.)
*/
int sg_release(struct burn_drive *d)
{
/* ts A60821
@ -586,6 +669,15 @@ int sg_release(struct burn_drive *d)
}
/** Sends a SCSI command to the drive, receives reply and evaluates wether
the command succeeded or shall be retried or finally failed.
Returned SCSI errors shall not lead to a return value indicating failure.
The callers get notified by c->error. An SCSI failure which leads not to
a retry shall be notified via scsi_notify_error().
The Libburn_log_sg_commandS facility might be of help when problems with
a drive have to be examined. It shall stay disabled for normal use.
@return: 1 success , <=0 failure
*/
int sg_issue_command(struct burn_drive *d, struct command *c)
{
int done = 0, no_c_page = 0;
@ -596,7 +688,7 @@ int sg_issue_command(struct burn_drive *d, struct command *c)
*/
#ifdef Libburn_log_sg_commandS
/* <<< ts A61030 */
/* ts A61030 */
static FILE *fp= NULL;
static int fpcount= 0;
int i;
@ -610,7 +702,7 @@ int sg_issue_command(struct burn_drive *d, struct command *c)
mmc_function_spy(buf);
#ifdef Libburn_log_sg_commandS
/* <<< ts A61030 */
/* ts A61030 */
if(fp==NULL) {
fp= fopen("/tmp/libburn_sg_command_log","a");
fprintf(fp,"\n-----------------------------------------\n");
@ -717,7 +809,6 @@ int sg_issue_command(struct burn_drive *d, struct command *c)
/* ts A61106 */
ex:;
if (c->error) {
/* >>> to become d->notify_error() */
scsi_notify_error(d, c, s.sbp, s.sb_len_wr, 0);
#ifdef Libburn_log_sg_commandS
@ -733,111 +824,8 @@ ex:;
}
/* ts A61030 - A61109 */
/* @param flag bit0=do report conditions which are considered not an error */
int scsi_notify_error(struct burn_drive *d, struct command *c,
unsigned char *sense, int senselen, int flag)
{