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nvmet_fc: Accept variable pad lengths on Create Association LS

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Target validation of the Create Association LS revised to accept any
LS as long as all non-pad data has been received. This allows a (newer)
target to accept the LS from older initiators with varying pad lengths.

Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
This commit is contained in:
James Smart 2017-07-07 18:08:26 -07:00 committed by Sagi Grimberg
parent d1438ad8f3
commit 4cb7ca8073
1 changed files with 13 additions and 7 deletions
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20
drivers/nvme/target/fc.c
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@ -1164,18 +1164,24 @@ nvmet_fc_ls_create_association(struct nvmet_fc_tgtport *tgtport,
memset(acc, 0, sizeof(*acc));
if (iod->rqstdatalen < sizeof(struct fcnvme_ls_cr_assoc_rqst))
/*
* FC-NVME spec changes. There are initiators sending different
* lengths as padding sizes for Create Association Cmd descriptor
* was incorrect.
* Accept anything of "minimum" length. Assume format per 1.15
* spec (with HOSTID reduced to 16 bytes), ignore how long the
* trailing pad length is.
*/
if (iod->rqstdatalen < FCNVME_LSDESC_CRA_RQST_MINLEN)
ret = VERR_CR_ASSOC_LEN;
else if (rqst->desc_list_len !=
fcnvme_lsdesc_len(
sizeof(struct fcnvme_ls_cr_assoc_rqst)))
else if (rqst->desc_list_len <
cpu_to_be32(FCNVME_LSDESC_CRA_RQST_MIN_LISTLEN))
ret = VERR_CR_ASSOC_RQST_LEN;
else if (rqst->assoc_cmd.desc_tag !=
cpu_to_be32(FCNVME_LSDESC_CREATE_ASSOC_CMD))
ret = VERR_CR_ASSOC_CMD;
else if (rqst->assoc_cmd.desc_len !=
fcnvme_lsdesc_len(
sizeof(struct fcnvme_lsdesc_cr_assoc_cmd)))
else if (rqst->assoc_cmd.desc_len <
cpu_to_be32(FCNVME_LSDESC_CRA_CMD_DESC_MIN_DESCLEN))
ret = VERR_CR_ASSOC_CMD_LEN;
else if (!rqst->assoc_cmd.ersp_ratio ||
(be16_to_cpu(rqst->assoc_cmd.ersp_ratio) >=