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target: use XCOPY TOO MANY TARGET DESCRIPTORS sense 

spc4r37 6.4.3.4 states:
  If the number of CSCD descriptors exceeds the allowed number, the copy
  manager shall terminate the command with CHECK CONDITION status, with
  the sense key set to ILLEGAL REQUEST, and the additional sense code
  set to TOO MANY TARGET DESCRIPTORS.

LIO currently responds with INVALID FIELD IN PARAMETER LIST, which sees
it fail the libiscsi ExtendedCopy.DescrLimits test.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Bart Van Assche <bart.vanassche@sandisk.com>
This commit is contained in:
David Disseldorp 2016-12-23 11:37:54 +01:00 committed by Bart Van Assche
parent e864212078
commit 61c359194c
1 changed files with 3 additions and 1 deletions
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4
drivers/target/target_core_xcopy.c
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@ -201,9 +201,11 @@ static int target_xcopy_parse_target_descriptors(struct se_cmd *se_cmd,
" multiple of %d\n", XCOPY_TARGET_DESC_LEN);
return -EINVAL;
}
if (tdll > 64) {
if (tdll > RCR_OP_MAX_TARGET_DESC_COUNT * XCOPY_TARGET_DESC_LEN) {
pr_err("XCOPY target descriptor supports a maximum"
" two src/dest descriptors, tdll: %hu too large..\n", tdll);
/* spc4r37 6.4.3.4 CSCD DESCRIPTOR LIST LENGTH field */
*sense_ret = TCM_TOO_MANY_TARGET_DESCS;
return -EINVAL;
}
/*