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| author | Varun Prakash <varun@chelsio.com> | 2021-11-22 11:08:41 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2021-11-23 17:22:40 +0100 |
| commit | 102110efdff6beedece6ab9b51664c32ac01e2db (patch) | |
| tree | 01b6f2280001409b64020de299ec8c6c5baf106a | |
| parent | nvmet-tcp: fix memory leak when performing a controller reset (diff) | |
| download | linux-102110efdff6beedece6ab9b51664c32ac01e2db.tar.xz linux-102110efdff6beedece6ab9b51664c32ac01e2db.zip | |
nvmet-tcp: fix incomplete data digest send
Current nvmet_try_send_ddgst() code does not check whether
all data digest bytes are transmitted, fix this by returning
-EAGAIN if all data digest bytes are not transmitted.
Fixes: 872d26a391da ("nvmet-tcp: add NVMe over TCP target driver")
Signed-off-by: Varun Prakash <varun@chelsio.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
| -rw-r--r-- | drivers/nvme/target/tcp.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/nvme/target/tcp.c b/drivers/nvme/target/tcp.c index 605aa2a8ca53..cb6a473c3eaf 100644 --- a/drivers/nvme/target/tcp.c +++ b/drivers/nvme/target/tcp.c @@ -711,10 +711,11 @@ static int nvmet_try_send_r2t(struct nvmet_tcp_cmd *cmd, bool last_in_batch) static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch) { struct nvmet_tcp_queue *queue = cmd->queue; + int left = NVME_TCP_DIGEST_LENGTH - cmd->offset; struct msghdr msg = { .msg_flags = MSG_DONTWAIT }; struct kvec iov = { .iov_base = (u8 *)&cmd->exp_ddgst + cmd->offset, - .iov_len = NVME_TCP_DIGEST_LENGTH - cmd->offset + .iov_len = left }; int ret; @@ -728,6 +729,10 @@ static int nvmet_try_send_ddgst(struct nvmet_tcp_cmd *cmd, bool last_in_batch) return ret; cmd->offset += ret; + left -= ret; + + if (left) + return -EAGAIN; if (queue->nvme_sq.sqhd_disabled) { cmd->queue->snd_cmd = NULL; |