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Added possibility to create virtual removable devices

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@346 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2008-04-21 15:04:10 +00:00
parent 9696649c7c
commit eaf21084d9
2 changed files with 23 additions and 3 deletions
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5
scst/README
View File

@@ -466,7 +466,10 @@ subdirectories "vdisk" and "vcdrom". They have similar layout:
This mode works ideally with high-end storage HBAs and for
applications that either do not need caching between application
and disk or need the large block throughput. See also below.
- REMOVABLE - with this flag set the device is reported to remote
initiators as removable.
* "close NAME" - closes device "NAME".
* "change NAME [PATH]" - changes a virtual CD in the VDISK CDROM.

21
scst/src/dev_handlers/scst_vdisk.c
View File

@@ -188,6 +188,7 @@ struct scst_vdisk_dev {
unsigned int nullio:1;
unsigned int blockio:1;
unsigned int cdrom_empty:1;
unsigned int removable:1;
int virt_id;
char name[16+1]; /* Name of virtual device,
must be <= SCSI Model + 1 */
@@ -1094,7 +1095,7 @@ static void vdisk_exec_inquiry(struct scst_cmd *cmd)
memset(buf, 0, sizeof(buf));
buf[0] = cmd->dev->handler->type; /* type dev */
if (buf[0] == TYPE_ROM)
if ((buf[0] == TYPE_ROM) || virt_dev->removable)
buf[1] = 0x80; /* removable */
/* Vital Product */
if (cmd->cdb[1] & EVPD) {
@@ -2559,6 +2560,10 @@ static int vdisk_read_proc(struct seq_file *seq, struct scst_dev_type *dev_type)
seq_printf(seq, "BIO ");
c += 4;
}
if (virt_dev->removable) {
seq_printf(seq, "RM ");
c += 4;
}
while (c < 16) {
seq_printf(seq, " ");
c++;
@@ -2577,7 +2582,7 @@ static void vdisk_report_registering(const char *type,
char buf[128];
int i, j;
i = snprintf(buf, sizeof(buf), "Registering virtual %s device %s",
i = snprintf(buf, sizeof(buf), "Registering virtual %s device %s ",
type, virt_dev->name);
j = i;
@@ -2600,6 +2605,14 @@ static void vdisk_report_registering(const char *type,
i += snprintf(&buf[i], sizeof(buf) - i, "%sNULLIO",
(j == i) ? "(" : ", ");
if (virt_dev->blockio)
i += snprintf(&buf[i], sizeof(buf) - i, "%sBLOCKIO",
(j == i) ? "(" : ", ");
if (virt_dev->removable)
i += snprintf(&buf[i], sizeof(buf) - i, "%sREMOVABLE",
(j == i) ? "(" : ", ");
if (j == i)
PRINT_INFO("%s", buf);
else
@@ -2759,6 +2772,10 @@ static int vdisk_write_proc(char *buffer, char **start, off_t offset,
p += 7;
virt_dev->blockio = 1;
TRACE_DBG("%s", "BLOCKIO");
} else if (!strncmp("REMOVABLE", p, 9)) {
p += 9;
virt_dev->removable = 1;
TRACE_DBG("%s", "REMOVABLE");
} else {
PRINT_ERROR("Unknown flag \"%s\"", p);
res = -EINVAL;