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nvmet-tcp: fix receive data digest calculation for multiple h2cdata PDUs 

When a host sends multiple h2cdata PDUs for a single command, we
should verify the data digest calculation per PDU and not
per command.

Fixes: 872d26a391 ("nvmet-tcp: add NVMe over TCP target driver")
Reported-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Tested-by: Narayan Ayalasomayajula <Narayan.Ayalasomayajula@wdc.com>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Sagi Grimberg 2021-02-03 15:00:01 -08:00 committed by Christoph Hellwig
parent 62eca39722
commit fda871c0ba
1 changed files with 24 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

31
drivers/nvme/target/tcp.c
View File

@ -378,7 +378,7 @@ err:
return NVME_SC_INTERNAL;
}
static void nvmet_tcp_ddgst(struct ahash_request *hash,
static void nvmet_tcp_send_ddgst(struct ahash_request *hash,
struct nvmet_tcp_cmd *cmd)
{
ahash_request_set_crypt(hash, cmd->req.sg,
@ -386,6 +386,23 @@ static void nvmet_tcp_ddgst(struct ahash_request *hash,
crypto_ahash_digest(hash);
}
static void nvmet_tcp_recv_ddgst(struct ahash_request *hash,
struct nvmet_tcp_cmd *cmd)
{
struct scatterlist sg;
struct kvec *iov;
int i;
crypto_ahash_init(hash);
for (i = 0, iov = cmd->iov; i < cmd->nr_mapped; i++, iov++) {
sg_init_one(&sg, iov->iov_base, iov->iov_len);
ahash_request_set_crypt(hash, &sg, NULL, iov->iov_len);
crypto_ahash_update(hash);
}
ahash_request_set_crypt(hash, NULL, (void *)&cmd->exp_ddgst, 0);
crypto_ahash_final(hash);
}
static void nvmet_setup_c2h_data_pdu(struct nvmet_tcp_cmd *cmd)
{
struct nvme_tcp_data_pdu *pdu = cmd->data_pdu;
@ -410,7 +427,7 @@ static void nvmet_setup_c2h_data_pdu(struct nvmet_tcp_cmd *cmd)
if (queue->data_digest) {
pdu->hdr.flags |= NVME_TCP_F_DDGST;
nvmet_tcp_ddgst(queue->snd_hash, cmd);
nvmet_tcp_send_ddgst(queue->snd_hash, cmd);
}
if (cmd->queue->hdr_digest) {
@ -1059,7 +1076,7 @@ static void nvmet_tcp_prep_recv_ddgst(struct nvmet_tcp_cmd *cmd)
{
struct nvmet_tcp_queue *queue = cmd->queue;
nvmet_tcp_ddgst(queue->rcv_hash, cmd);
nvmet_tcp_recv_ddgst(queue->rcv_hash, cmd);
queue->offset = 0;
queue->left = NVME_TCP_DIGEST_LENGTH;
queue->rcv_state = NVMET_TCP_RECV_DDGST;
@ -1080,14 +1097,14 @@ static int nvmet_tcp_try_recv_data(struct nvmet_tcp_queue *queue)
cmd->rbytes_done += ret;
}
if (queue->data_digest) {
nvmet_tcp_prep_recv_ddgst(cmd);
return 0;
}
nvmet_tcp_unmap_pdu_iovec(cmd);
if (!(cmd->flags & NVMET_TCP_F_INIT_FAILED) &&
cmd->rbytes_done == cmd->req.transfer_len) {
if (queue->data_digest) {
nvmet_tcp_prep_recv_ddgst(cmd);
return 0;
}
cmd->req.execute(&cmd->req);
}