On 12/16/2013 10:20 AM, Hannes Reinecke wrote: > On 12/14/2013 12:59 AM, Andy Grover wrote: >> Indicate support for hierarchical LUN addressing. >> >> Set address method field in each LUN reported by REPORT LUNS to 1, in >> accordance with SCSI SAM specs. >> >> Signed-off-by: Andy Grover <agro...@redhat.com> >> --- >> drivers/target/target_core_spc.c | 8 ++++++-- >> include/target/target_core_base.h | 4 ++-- >> 2 files changed, 8 insertions(+), 4 deletions(-) >> >> diff --git a/drivers/target/target_core_spc.c >> b/drivers/target/target_core_spc.c >> index 0b678fc..04690bf 100644 >> --- a/drivers/target/target_core_spc.c >> +++ b/drivers/target/target_core_spc.c >> @@ -79,7 +79,7 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char >> *buf) >> buf[2] = 0x05; /* SPC-3 */ >> >> /* >> - * NORMACA and HISUP = 0, RESPONSE DATA FORMAT = 2 >> + * NORMACA = 0, HISUP = 1, RESPONSE DATA FORMAT = 2 >> * >> * SPC4 says: >> * A RESPONSE DATA FORMAT field set to 2h indicates that the >> @@ -88,7 +88,7 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char >> *buf) >> * obsolete. Response data format values greater than 2h are >> * reserved. >> */ >> - buf[3] = 2; >> + buf[3] = 0x12; >> >> /* >> * Enable SCCS and TPGS fields for Emulated ALUA >> @@ -1164,6 +1164,10 @@ sense_reason_t spc_emulate_report_luns(struct se_cmd >> *cmd) >> break; >> >> int_to_scsilun(deve->mapped_lun, (struct scsi_lun >> *)&buf[offset]); >> + >> + /* Address method 1 for hier flat-space address. see SAM-5 */ >> + buf[offset] |= (1 << 6); >> + >> offset += 8; >> } >> spin_unlock_irq(&sess->se_node_acl->device_list_lock); >> diff --git a/include/target/target_core_base.h >> b/include/target/target_core_base.h >> index 08ecfed..537cc67 100644 >> --- a/include/target/target_core_base.h >> +++ b/include/target/target_core_base.h >> @@ -14,8 +14,8 @@ >> #define TARGET_CORE_VERSION TARGET_CORE_MOD_VERSION >> >> /* Maximum Number of LUNs per Target Portal Group */ >> -/* Don't raise above 511 or REPORT_LUNS needs to handle >1 page */ >> -#define TRANSPORT_MAX_LUNS_PER_TPG 256 >> +/* Don't raise above 16384 or a different format in report_luns is needed */ >> +#define TRANSPORT_MAX_LUNS_PER_TPG 16384 >> /* >> * By default we use 32-byte CDBs in TCM Core and subsystem plugin code. >> * >> > NO WAY. > > TCM is (currently) keeping the LUNs in a static array. > Which is sort-of-okay if the number of LUNs is somewhat reasonable, > as it was for 256. > But 16k is way beyond any sensible number and will increase the > memory footprint by a massive amount, irrespective whether someone > will actually _use_ such a large number of LUNs. > > Before attempting that one would need to convert the LUN array into > something scalable, like a linked list or somesuch. > Ouch.
Please ignore this mail. One should _really_ read the entire patchset before jumping to conclusions. Monday morning and all that ... Sorry for the noise. Cheers, Hannes -- Dr. Hannes Reinecke zSeries & Storage h...@suse.de +49 911 74053 688 SUSE LINUX Products GmbH, Maxfeldstr. 5, 90409 Nürnberg GF: J. Hawn, J. Guild, F. Imendörffer, HRB 16746 (AG Nürnberg) -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
