diff options
| author | Christoph Hellwig <hch@lst.de> | 2017-01-31 16:57:28 +0100 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-01-31 14:00:29 -0700 |
| commit | 09fc54ccc42744669e748434af5c2f8adcad900f (patch) | |
| tree | 539f917b366fc7836e6931fda6b7c85412040fd9 | |
| parent | 27410a8927fb89bd150de08d749a8ed7f67b7739 (diff) | |
| download | linux-0-day-09fc54ccc42744669e748434af5c2f8adcad900f.tar.gz linux-0-day-09fc54ccc42744669e748434af5c2f8adcad900f.tar.xz | |
nbd: move request validity checking into nbd_send_cmd
This is where we do the rest of the request handling, which will
become much simpler soon, too.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@fb.com>
| -rw-r--r-- | drivers/block/nbd.c | 21 |
1 files changed, 10 insertions, 11 deletions
diff --git a/drivers/block/nbd.c b/drivers/block/nbd.c index d4c6281a181c0..8bce1c7c18d52 100644 --- a/drivers/block/nbd.c +++ b/drivers/block/nbd.c @@ -271,6 +271,9 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) u32 type; u32 tag = blk_mq_unique_tag(req); + if (req->cmd_type != REQ_TYPE_FS) + return -EIO; + if (req_op(req) == REQ_OP_DISCARD) type = NBD_CMD_TRIM; else if (req_op(req) == REQ_OP_FLUSH) @@ -280,6 +283,13 @@ static int nbd_send_cmd(struct nbd_device *nbd, struct nbd_cmd *cmd, int index) else type = NBD_CMD_READ; + if (rq_data_dir(req) == WRITE && + (nbd->flags & NBD_FLAG_READ_ONLY)) { + dev_err_ratelimited(disk_to_dev(nbd->disk), + "Write on read-only\n"); + return -EIO; + } + memset(&request, 0, sizeof(request)); request.magic = htonl(NBD_REQUEST_MAGIC); request.type = htonl(type); @@ -503,17 +513,6 @@ static void nbd_handle_cmd(struct nbd_cmd *cmd, int index) goto error_out; } - if (req->cmd_type != REQ_TYPE_FS) - goto error_out; - - if (req->cmd_type == REQ_TYPE_FS && - rq_data_dir(req) == WRITE && - (nbd->flags & NBD_FLAG_READ_ONLY)) { - dev_err_ratelimited(disk_to_dev(nbd->disk), - "Write on read-only\n"); - goto error_out; - } - req->errors = 0; nsock = nbd->socks[index]; |