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| author | Minwoo Im <minwoo.im.dev@gmail.com> | 2019-06-02 12:43:39 +0900 |
|---|---|---|
| committer | Sagi Grimberg <sagi@grimberg.me> | 2019-06-04 09:29:31 -0700 |
| commit | 3562f5d9f21e7779ae442a45197fed6cb247fd22 (patch) | |
| tree | ebab2e5a28dfcdd2e7659e82fe282e92e62b070d /drivers/nvme | |
| parent | 6486199378a505c58fddc47459631235c9fb7638 (diff) | |
| download | linux-0-day-3562f5d9f21e7779ae442a45197fed6cb247fd22.tar.gz linux-0-day-3562f5d9f21e7779ae442a45197fed6cb247fd22.tar.xz | |
nvmet: fix data_len to 0 for bdev-backed write_zeroes
The WRITE ZEROES command has no data transfer so that we need to
initialize the struct (nvmet_req *req)->data_len to 0x0. While
(nvmet_req *req)->transfer_len is initialized in nvmet_req_init(),
data_len will be initialized by nowhere which might cause the failure
with status code NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR randomly. It's
because nvmet_req_execute() checks like:
if (unlikely(req->data_len != req->transfer_len)) {
req->error_loc = offsetof(struct nvme_common_command, dptr);
nvmet_req_complete(req, NVME_SC_SGL_INVALID_DATA | NVME_SC_DNR);
} else
req->execute(req);
This patch fixes req->data_len not to be a randomly assigned by
initializing it to 0x0 when preparing the command in
nvmet_bdev_parse_io_cmd().
nvmet_file_parse_io_cmd() which is for file-backed I/O has already
initialized the data_len field to 0x0, though.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Sagi Grimberg <sagi@grimberg.me>
Cc: Chaitanya Kulkarni <Chaitanya.Kulkarni@wdc.com>
Signed-off-by: Minwoo Im <minwoo.im.dev@gmail.com>
Reviewed-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Diffstat (limited to 'drivers/nvme')
| -rw-r--r-- | drivers/nvme/target/io-cmd-bdev.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index 3efc52f9c3092..7a1cf6437a6a5 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -293,6 +293,7 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) return 0; case nvme_cmd_write_zeroes: req->execute = nvmet_bdev_execute_write_zeroes; + req->data_len = 0; return 0; default: pr_err("unhandled cmd %d on qid %d\n", cmd->common.opcode, |