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nvmet: add error log support for file backend

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This patch adds support for the file backend to populate the
error log entries. Here we map the errno to the NVMe status codes.

Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Chaitanya Kulkarni 2018-12-12 15:11:43 -08:00 committed by Christoph Hellwig
parent 3b031d1599
commit c6aa3542e0
3 changed files with 60 additions and 15 deletions
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38
drivers/nvme/target/core.c
View File

@ -45,6 +45,44 @@ u32 nvmet_ana_group_enabled[NVMET_MAX_ANAGRPS + 1];
u64 nvmet_ana_chgcnt;
DECLARE_RWSEM(nvmet_ana_sem);
inline u16 errno_to_nvme_status(struct nvmet_req *req, int errno)
{
u16 status;
switch (errno) {
case -ENOSPC:
req->error_loc = offsetof(struct nvme_rw_command, length);
status = NVME_SC_CAP_EXCEEDED | NVME_SC_DNR;
break;
case -EREMOTEIO:
req->error_loc = offsetof(struct nvme_rw_command, slba);
status = NVME_SC_LBA_RANGE | NVME_SC_DNR;
break;
case -EOPNOTSUPP:
req->error_loc = offsetof(struct nvme_common_command, opcode);
switch (req->cmd->common.opcode) {
case nvme_cmd_dsm:
case nvme_cmd_write_zeroes:
status = NVME_SC_ONCS_NOT_SUPPORTED | NVME_SC_DNR;
break;
default:
status = NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
break;
case -ENODATA:
req->error_loc = offsetof(struct nvme_rw_command, nsid);
status = NVME_SC_ACCESS_DENIED;
break;
case -EIO:
/* FALLTHRU */
default:
req->error_loc = offsetof(struct nvme_common_command, opcode);
status = NVME_SC_INTERNAL | NVME_SC_DNR;
}
return status;
}
static struct nvmet_subsys *nvmet_find_get_subsys(struct nvmet_port *port,
const char *subsysnqn);

35
drivers/nvme/target/io-cmd-file.c
View File

@ -112,6 +112,7 @@ static ssize_t nvmet_file_submit_bvec(struct nvmet_req *req, loff_t pos,
static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2)
{
struct nvmet_req *req = container_of(iocb, struct nvmet_req, f.iocb);
u16 status = NVME_SC_SUCCESS;
if (req->f.bvec != req->inline_bvec) {
if (likely(req->f.mpool_alloc == false))
@ -120,8 +121,9 @@ static void nvmet_file_io_done(struct kiocb *iocb, long ret, long ret2)
mempool_free(req->f.bvec, req->ns->bvec_pool);
}
nvmet_req_complete(req, ret != req->data_len ?
NVME_SC_INTERNAL | NVME_SC_DNR : 0);
if (unlikely(ret != req->data_len))
status = errno_to_nvme_status(req, ret);
nvmet_req_complete(req, status);
}
static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags)
@ -140,7 +142,7 @@ static bool nvmet_file_execute_io(struct nvmet_req *req, int ki_flags)
pos = le64_to_cpu(req->cmd->rw.slba) << req->ns->blksize_shift;
if (unlikely(pos + req->data_len > req->ns->size)) {
nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR);
nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC));
return true;
}
@ -254,9 +256,7 @@ static void nvmet_file_execute_rw(struct nvmet_req *req)
u16 nvmet_file_flush(struct nvmet_req *req)
{
if (vfs_fsync(req->ns->file, 1) < 0)
return NVME_SC_INTERNAL | NVME_SC_DNR;
return 0;
return errno_to_nvme_status(req, vfs_fsync(req->ns->file, 1));
}
static void nvmet_file_flush_work(struct work_struct *w)
@ -277,30 +277,34 @@ static void nvmet_file_execute_discard(struct nvmet_req *req)
int mode = FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE;
struct nvme_dsm_range range;
loff_t offset, len;
u16 ret;
u16 status = 0;
int ret;
int i;
for (i = 0; i <= le32_to_cpu(req->cmd->dsm.nr); i++) {
ret = nvmet_copy_from_sgl(req, i * sizeof(range), &range,
status = nvmet_copy_from_sgl(req, i * sizeof(range), &range,
sizeof(range));
if (ret)
if (status)
break;
offset = le64_to_cpu(range.slba) << req->ns->blksize_shift;
len = le32_to_cpu(range.nlb);
len <<= req->ns->blksize_shift;
if (offset + len > req->ns->size) {
ret = NVME_SC_LBA_RANGE | NVME_SC_DNR;
req->error_slba = le64_to_cpu(range.slba);
status = errno_to_nvme_status(req, -ENOSPC);
break;
}
if (vfs_fallocate(req->ns->file, mode, offset, len)) {
ret = NVME_SC_INTERNAL | NVME_SC_DNR;
ret = vfs_fallocate(req->ns->file, mode, offset, len);
if (ret) {
req->error_slba = le64_to_cpu(range.slba);
status = errno_to_nvme_status(req, ret);
break;
}
}
nvmet_req_complete(req, ret);
nvmet_req_complete(req, status);
}
static void nvmet_file_dsm_work(struct work_struct *w)
@ -340,12 +344,12 @@ static void nvmet_file_write_zeroes_work(struct work_struct *w)
req->ns->blksize_shift);
if (unlikely(offset + len > req->ns->size)) {
nvmet_req_complete(req, NVME_SC_LBA_RANGE | NVME_SC_DNR);
nvmet_req_complete(req, errno_to_nvme_status(req, -ENOSPC));
return;
}
ret = vfs_fallocate(req->ns->file, mode, offset, len);
nvmet_req_complete(req, ret < 0 ? NVME_SC_INTERNAL | NVME_SC_DNR : 0);
nvmet_req_complete(req, ret < 0 ? errno_to_nvme_status(req, ret) : 0);
}
static void nvmet_file_execute_write_zeroes(struct nvmet_req *req)
@ -380,6 +384,7 @@ u16 nvmet_file_parse_io_cmd(struct nvmet_req *req)
default:
pr_err("unhandled cmd for file ns %d on qid %d\n",
cmd->common.opcode, req->sq->qid);
req->error_loc = offsetof(struct nvme_common_command, opcode);
return NVME_SC_INVALID_OPCODE | NVME_SC_DNR;
}
}

2
drivers/nvme/target/nvmet.h
View File

@ -494,4 +494,6 @@ static inline u32 nvmet_rw_len(struct nvmet_req *req)
return ((u32)le16_to_cpu(req->cmd->rw.length) + 1) <<
req->ns->blksize_shift;
}
u16 errno_to_nvme_status(struct nvmet_req *req, int errno);
#endif /* _NVMET_H */