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VAXen with SCSI: Allow some cross controller read only drive access

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This commit is contained in:
Mark Pizzolato
2020-12-29 11:14:34 -08:00
parent 613625e878
commit 8c42a3436c
5 changed files with 84 additions and 17 deletions
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31
sim_disk.c
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@@ -2043,6 +2043,8 @@ for (i = 0; checks[i] != NULL; i++) {
return ret_val;
}
static t_stat store_disk_footer (UNIT *uptr, const char *dtype);
static t_stat get_disk_footer (UNIT *uptr)
{
struct disk_context *ctx = (struct disk_context *)uptr->disk_ctx;
@@ -2109,6 +2111,13 @@ if (f) {
f = NULL;
}
else {
/* We've got a valid footer, but it may need to be corrected */
if ((NtoHl (f->TransferElementSize) == 1) &&
(0 == memcmp (f->DriveType, "RZ", 2))) {
f->TransferElementSize = NtoHl (2);
f->Checksum = NtoHl (eth_crc32 (0, f, sizeof (*f) - sizeof (f->Checksum)));
store_disk_footer (uptr, (char *)f->DriveType);
}
free (ctx->footer);
ctx->footer = f;
container_size -= sizeof (*f);
@@ -2161,8 +2170,10 @@ free (ctx->footer);
ctx->footer = f;
switch (f->AccessFormat) {
case DKUF_F_STD: /* SIMH format */
if (sim_fseeko ((FILE *)uptr->fileref, total_sectors * ctx->sector_size, SEEK_SET) == 0)
if (sim_fseeko ((FILE *)uptr->fileref, total_sectors * ctx->sector_size, SEEK_SET) == 0) {
sim_fwrite (f, sizeof (*f), 1, (FILE *)uptr->fileref);
fflush ((FILE *)uptr->fileref);
}
break;
case DKUF_F_VHD: /* VHD format */
break;
@@ -2189,7 +2200,6 @@ DEVICE *dptr;
char tbuf[4*CBUFSIZE];
FILE *(*open_function)(const char *filename, const char *mode) = sim_fopen;
FILE *(*create_function)(const char *filename, t_offset desiredsize) = NULL;
t_offset (*size_function)(FILE *file);
t_stat (*storage_function)(FILE *file, uint32 *sector_size, uint32 *removable, uint32 *is_cdrom) = NULL;
t_bool created = FALSE, copied = FALSE;
t_bool auto_format = FALSE;
@@ -2416,7 +2426,6 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
sim_vhd_disk_close (uptr->fileref); /* close vhd file*/
uptr->fileref = NULL;
open_function = sim_vhd_disk_open;
size_function = sim_vhd_disk_size;
break;
}
while (tmp_size < sector_size)
@@ -2426,7 +2435,6 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
sim_disk_set_fmt (uptr, 0, "RAW", NULL); /* set file format to RAW */
sim_os_disk_close_raw (uptr->fileref); /* close raw file*/
open_function = sim_os_disk_open_raw;
size_function = sim_os_disk_size_raw;
storage_function = sim_os_disk_info_raw;
uptr->fileref = NULL;
break;
@@ -2434,7 +2442,6 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
}
sim_disk_set_fmt (uptr, 0, "SIMH", NULL); /* set file format to SIMH */
open_function = sim_fopen;
size_function = sim_fsize_ex;
break;
case DKUF_F_STD: /* SIMH format */
if (NULL != (uptr->fileref = sim_vhd_disk_open (cptr, "rb"))) { /* Try VHD first */
@@ -2442,17 +2449,14 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
sim_vhd_disk_close (uptr->fileref); /* close vhd file*/
uptr->fileref = NULL;
open_function = sim_vhd_disk_open;
size_function = sim_vhd_disk_size;
auto_format = TRUE;
break;
}
open_function = sim_fopen;
size_function = sim_fsize_ex;
break;
case DKUF_F_VHD: /* VHD format */
open_function = sim_vhd_disk_open;
create_function = sim_vhd_disk_create;
size_function = sim_vhd_disk_size;
storage_function = sim_os_disk_info_raw;
break;
case DKUF_F_RAW: /* Raw Physical Disk Access */
@@ -2461,12 +2465,10 @@ switch (DK_GET_FMT (uptr)) { /* case on format */
sim_vhd_disk_close (uptr->fileref); /* close vhd file*/
uptr->fileref = NULL;
open_function = sim_vhd_disk_open;
size_function = sim_vhd_disk_size;
auto_format = TRUE;
break;
}
open_function = sim_os_disk_open_raw;
size_function = sim_os_disk_size_raw;
storage_function = sim_os_disk_info_raw;
break;
default:
@@ -2552,8 +2554,13 @@ if ((DK_GET_FMT (uptr) == DKUF_F_VHD) || (ctx->footer)) {
cmd[sizeof (cmd) - 1] = '\0';
snprintf (cmd, sizeof (cmd) - 1, "%s %s", sim_uname (uptr), container_dtype);
r = set_cmd (0, cmd);
if (r != SCPE_OK)
r = sim_messagef (r, "Can't set %s to drive type %s\n", sim_uname (uptr), container_dtype);
if (r != SCPE_OK) {
r = sim_messagef (r, "%s: Can't set to drive type %s\n", sim_uname (uptr), container_dtype);
if ((uptr->flags & UNIT_RO) != 0) /* Not Opening read only? */
r = sim_messagef (SCPE_OK, "%s: Read Only access to inconsistent drive type allowed\n", sim_uname (uptr));
else
sim_messagef (SCPE_OK, "'%s' can only be attached Read Only to %s\n", cptr, sim_uname (uptr));
}
}
}
}