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nvmet_fc: fix better length checking 

Reorganize nvmet_fc_handle_fcp_rqst() so that the nvmet req.transfer_len
field is set after the call nvmet_req_init(). An update to nvmet now
has nvmet_req_init() clearing the field, thus the fc transport was losing
the value.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: James Smart <james.smart@broadcom.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
James Smart 2017-11-15 17:00:21 -08:00 committed by Jens Axboe
parent 34d9715ac1
commit cce75291ff
1 changed files with 4 additions and 2 deletions
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6
drivers/nvme/target/fc.c
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@ -2144,6 +2144,7 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
struct nvmet_fc_fcp_iod *fod)
{
struct nvme_fc_cmd_iu *cmdiu = &fod->cmdiubuf;
u32 xfrlen = be32_to_cpu(cmdiu->data_len);
int ret;
/*
@ -2157,7 +2158,6 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
fod->fcpreq->done = nvmet_fc_xmt_fcp_op_done;
fod->req.transfer_len = be32_to_cpu(cmdiu->data_len);
if (cmdiu->flags & FCNVME_CMD_FLAGS_WRITE) {
fod->io_dir = NVMET_FCP_WRITE;
if (!nvme_is_write(&cmdiu->sqe))
@ -2168,7 +2168,7 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
goto transport_error;
} else {
fod->io_dir = NVMET_FCP_NODATA;
if (fod->req.transfer_len)
if (xfrlen)
goto transport_error;
}
@ -2192,6 +2192,8 @@ nvmet_fc_handle_fcp_rqst(struct nvmet_fc_tgtport *tgtport,
return;
}
fod->req.transfer_len = xfrlen;
/* keep a running counter of tail position */
atomic_inc(&fod->queue->sqtail);