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Small thin provisioning improvements

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git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@2445 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Vladislav Bolkhovitin
2010-10-22 13:08:04 +00:00
parent ae1df6bead
commit d1745448cf
1 changed files with 18 additions and 1 deletions
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19
scst/src/dev_handlers/scst_vdisk.c
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@@ -1319,6 +1319,14 @@ static void vdisk_exec_unmap(struct scst_cmd *cmd, struct scst_vdisk_thr *thr)
goto out;
}
if (unlikely(cmd->cdb[1] & 1)) {
/* ANCHOR not supported */
TRACE_DBG("%s", "Invalid ANCHOR field");
scst_set_cmd_error(cmd,
SCST_LOAD_SENSE(scst_sense_invalid_field_in_cdb));
goto out;
}
length = scst_get_full_buf(cmd, &address);
if (unlikely(length <= 0)) {
if (length == 0)
@@ -2320,8 +2328,17 @@ static void vdisk_exec_read_capacity16(struct scst_cmd *cmd)
break;
}
if (virt_dev->thin_provisioned)
if (virt_dev->thin_provisioned) {
buffer[14] |= 0x80; /* Add TPE */
#if 0 /*
* Might be a big performance and functionality win, but might be
* dangerous as well, although generally nearly always it should be set,
* because nearly all devices should return zero for unmapped blocks.
* But let's be on the safe side and disable it for now.
*/
buffer[14] |= 0x40; /* Add TPRZ */
#endif
}
length = scst_get_buf_first(cmd, &address);
if (unlikely(length <= 0)) {