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target: Fix trailing ASCII space usage in INQUIRY vendor+model

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commit ee60bddba5 upstream.

This patch fixes spc_emulate_inquiry_std() to add trailing ASCII
spaces for INQUIRY vendor + model fields following SPC-4 text:

  "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)."

This addresses a problem with Falconstor NSS multipathing.

Reported-by: Tomas Molota <tomas.molota@lightstorm.sk>
Signed-off-by: Nicholas Bellinger <nab@linux-iscsi.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Nicholas Bellinger 2013-07-24 16:15:08 -07:00 committed by Greg Kroah-Hartman
parent 3f661fbf82
commit e51c435e8f
1 changed files with 6 additions and 3 deletions
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9
drivers/target/target_core_cdb.c
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@ -97,9 +97,12 @@ target_emulate_inquiry_std(struct se_cmd *cmd, char *buf)
buf[7] = 0x2; /* CmdQue=1 */
snprintf(&buf[8], 8, "LIO-ORG");
snprintf(&buf[16], 16, "%s", dev->se_sub_dev->t10_wwn.model);
snprintf(&buf[32], 4, "%s", dev->se_sub_dev->t10_wwn.revision);
memcpy(&buf[8], "LIO-ORG ", 8);
memset(&buf[16], 0x20, 16);
memcpy(&buf[16], dev->se_sub_dev->t10_wwn.model,
min_t(size_t, strlen(dev->se_sub_dev->t10_wwn.model), 16));
memcpy(&buf[32], dev->se_sub_dev->t10_wwn.revision,
min_t(size_t, strlen(dev->se_sub_dev->t10_wwn.revision), 4));
buf[4] = 31; /* Set additional length to 31 */
return 0;