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target_core: simplify scsi_name_len calculation

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scsi_name_len in spc_emulate_evpd_83 is calculated twice, with
the results of the first calculation discarded. So remove it.
And check for the maximum allowed length, too.

Signed-off-by: Hannes Reinecke <hare@suse.de>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
This commit is contained in:
Hannes Reinecke 2013-12-17 09:18:47 +01:00 committed by Nicholas Bellinger
parent 9c6e164c8c
commit 03ba84ca95
1 changed files with 3 additions and 10 deletions
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13
drivers/target/target_core_spc.c
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@ -365,16 +365,6 @@ check_lu_gp:
* section 7.5.1 Table 362
*/
check_scsi_name:
scsi_name_len = strlen(tpg->se_tpg_tfo->tpg_get_wwn(tpg));
/* UTF-8 ",t,0x<16-bit TPGT>" + NULL Terminator */
scsi_name_len += 10;
/* Check for 4-byte padding */
padding = ((-scsi_name_len) & 3);
if (padding != 0)
scsi_name_len += padding;
/* Header size + Designation descriptor */
scsi_name_len += 4;
buf[off] =
(tpg->se_tpg_tfo->get_fabric_proto_ident(tpg) << 4);
buf[off++] |= 0x3; /* CODE SET == UTF-8 */
@ -402,8 +392,11 @@ check_scsi_name:
* shall be no larger than 256 and shall be a multiple
* of four.
*/
padding = ((-scsi_name_len) & 3);
if (padding)
scsi_name_len += padding;
if (scsi_name_len > 256)
scsi_name_len = 256;
buf[off-1] = scsi_name_len;
off += scsi_name_len;