| Message ID | 20181130233423.26556-2-ddiss@suse.de (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | target: user configurable T10 Vendor ID | expand |
On 12/1/18 12:34 AM, David Disseldorp wrote: > spc5r17.pdf specifies: > 4.3.1 ASCII data field requirements > ASCII data fields shall contain only ASCII printable characters (i.e., > code values 20h to 7Eh) and may be terminated with one or more ASCII > null (00h) characters. > ASCII data fields described as being left-aligned shall have any > unused bytes at the end of the field (i.e., highest offset) and the > unused bytes shall be filled with ASCII space characters (20h). > > LIO currently space-pads the T10 VENDOR IDENTIFICATION and PRODUCT > IDENTIFICATION fields in the standard INQUIRY data. However, the > PRODUCT REVISION LEVEL field in the standard INQUIRY data as well as the > T10 VENDOR IDENTIFICATION field in the INQUIRY Device Identification VPD > Page are zero-terminated/zero-padded. > > Fix this inconsistency by using space-padding for all of the above > fields. > > Signed-off-by: David Disseldorp <ddiss@suse.de> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Reviewed-by: Bryant G. Ly <bly@catalogicsoftware.com> > Reviewed-by: Lee Duncan <lduncan@suse.com> > --- > drivers/target/target_core_spc.c | 17 ++++++++++++----- > 1 file changed, 12 insertions(+), 5 deletions(-) > Reviewed-by: Hannes Reinecke <hare@suse.com> Cheers, Hannes
On Sat, Dec 01, 2018 at 12:34:19AM +0100, David Disseldorp wrote: > spc5r17.pdf specifies: > 4.3.1 ASCII data field requirements > ASCII data fields shall contain only ASCII printable characters (i.e., > code values 20h to 7Eh) and may be terminated with one or more ASCII > null (00h) characters. > ASCII data fields described as being left-aligned shall have any > unused bytes at the end of the field (i.e., highest offset) and the > unused bytes shall be filled with ASCII space characters (20h). > > LIO currently space-pads the T10 VENDOR IDENTIFICATION and PRODUCT > IDENTIFICATION fields in the standard INQUIRY data. However, the > PRODUCT REVISION LEVEL field in the standard INQUIRY data as well as the > T10 VENDOR IDENTIFICATION field in the INQUIRY Device Identification VPD > Page are zero-terminated/zero-padded. > > Fix this inconsistency by using space-padding for all of the above > fields. > > Signed-off-by: David Disseldorp <ddiss@suse.de> > Reviewed-by: Christoph Hellwig <hch@lst.de> > Reviewed-by: Bryant G. Ly <bly@catalogicsoftware.com> > Reviewed-by: Lee Duncan <lduncan@suse.com> > --- > drivers/target/target_core_spc.c | 17 ++++++++++++----- > 1 file changed, 12 insertions(+), 5 deletions(-) > Reviewed-by: Roman Bolshakov <r.bolshakov@yadro.com> Best regards, Roman
diff --git a/drivers/target/target_core_spc.c b/drivers/target/target_core_spc.c index f459118bc11b..c37dd36ec77d 100644 --- a/drivers/target/target_core_spc.c +++ b/drivers/target/target_core_spc.c @@ -108,12 +108,17 @@ spc_emulate_inquiry_std(struct se_cmd *cmd, unsigned char *buf) buf[7] = 0x2; /* CmdQue=1 */ - memcpy(&buf[8], "LIO-ORG ", 8); - memset(&buf[16], 0x20, 16); + /* + * ASCII data fields described as being left-aligned shall have any + * unused bytes at the end of the field (i.e., highest offset) and the + * unused bytes shall be filled with ASCII space characters (20h). + */ + memset(&buf[8], 0x20, 8 + 16 + 4); + memcpy(&buf[8], "LIO-ORG", sizeof("LIO-ORG") - 1); memcpy(&buf[16], dev->t10_wwn.model, - min_t(size_t, strlen(dev->t10_wwn.model), 16)); + strnlen(dev->t10_wwn.model, 16)); memcpy(&buf[32], dev->t10_wwn.revision, - min_t(size_t, strlen(dev->t10_wwn.revision), 4)); + strnlen(dev->t10_wwn.revision, 4)); buf[4] = 31; /* Set additional length to 31 */ return 0; @@ -251,7 +256,9 @@ spc_emulate_evpd_83(struct se_cmd *cmd, unsigned char *buf) buf[off] = 0x2; /* ASCII */ buf[off+1] = 0x1; /* T10 Vendor ID */ buf[off+2] = 0x0; - memcpy(&buf[off+4], "LIO-ORG", 8); + /* left align Vendor ID and pad with spaces */ + memset(&buf[off+4], 0x20, 8); + memcpy(&buf[off+4], "LIO-ORG", sizeof("LIO-ORG") - 1); /* Extra Byte for NULL Terminator */ id_len++; /* Identifier Length */