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scst_copy_mgr: Implement a workaround for non-compliant initiator systems

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Reported-by: Eitan Cohen <eitancohen456@gmail.com>


git-svn-id: http://svn.code.sf.net/p/scst/svn/trunk@9498 d57e44dd-8a1f-0410-8b47-8ef2f437770f
This commit is contained in:
Bart Van Assche
2021-09-01 04:33:22 +00:00
parent 3a1763bc73
commit 5e90abb64a
1 changed files with 10 additions and 1 deletions
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11
scst/src/scst_copy_mgr.c
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@@ -2944,6 +2944,8 @@ static int scst_cm_parse_id_tgt_descr(struct scst_cmd *cmd, const uint8_t *seg,
/* ToDo: make it hash based */
list_for_each_entry(des, &scst_cm_desig_list, cm_desig_list_entry) {
uint8_t cmp_len;
TRACE_DBG("des %p (tgt_dev %p, lun %lld)", des, des->desig_tgt_dev,
(unsigned long long)des->desig_tgt_dev->lun);
if (seg[4] != des->desig[0])
@@ -2952,7 +2954,14 @@ static int scst_cm_parse_id_tgt_descr(struct scst_cmd *cmd, const uint8_t *seg,
continue;
if (seg[7] > des->desig[3])
continue;
if (memcmp(&des->desig[4], &seg[8], min_t(int, seg[7], des->desig[3])) == 0) {
/*
* From SPC-6: "The designator length shall be 20 or less".
* However, both libiscsi and sg_copy may specify a designator
* length > 20 bytes while truncating the designator to 20
* bytes. Hence the code below that restricts cmp_len to 20.
*/
cmp_len = min_t(u8, min(seg[7], des->desig[3]), 20);
if (memcmp(&des->desig[4], &seg[8], cmp_len) == 0) {
TRACE_DBG("Tgt_dev %p (lun %lld) found",
des->desig_tgt_dev,
(unsigned long long)des->desig_tgt_dev->lun);