From: James Smart Date: Sat, 8 Jul 2017 01:08:26 +0000 (-0700) Subject: nvmet_fc: Accept variable pad lengths on Create Association LS X-Git-Tag: v4.13-rc1~56^2~1^2~3 X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=4cb7ca8073e1f226487168155c9a887079d605e4;p=linux.git nvmet_fc: Accept variable pad lengths on Create Association LS 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 Signed-off-by: Sagi Grimberg --- diff --git a/drivers/nvme/target/fc.c b/drivers/nvme/target/fc.c index 7692a96c9065..1e6dcc241b3c 100644 --- a/drivers/nvme/target/fc.c +++ b/drivers/nvme/target/fc.c @@ -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) >=