diff options
| author |   Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com> | 2018-05-23 00:34:39 -0400 |
|---|---|---|
| committer |   Christoph Hellwig <hch@lst.de> | 2018-05-25 16:50:12 +0200 |
| commit | d5eff33ee6f80864d889d64fd3f6ea7b78dd1b24 (patch) | |
| tree | c1fde2a87945df698f3a7bed7be6f76d11276e10 /drivers/nvme/target/admin-cmd.c | |
| parent | nvmet: remove duplicate NULL initialization for req->ns (diff) | |
| download | linux-dev-d5eff33ee6f80864d889d64fd3f6ea7b78dd1b24.tar.xz linux-dev-d5eff33ee6f80864d889d64fd3f6ea7b78dd1b24.zip | |
nvmet: add simple file backed ns support
This patch adds simple file backed namespace support for NVMeOF target.
The new file io-cmd-file.c is responsible for handling the code for I/O
commands when ns is file backed. Also, we introduce mempools based slow
path using sync I/Os for file backed ns to ensure forward progress under
reclaim.
The old block device based implementation is moved to io-cmd-bdev.c and
use a "nvmet_bdev_" symbol prefix. The enable/disable calls are also
move into the respective files.
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: updated changelog, fixed double req->ns lookup in bdev case]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'drivers/nvme/target/admin-cmd.c')
| -rw-r--r-- | drivers/nvme/target/admin-cmd.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/nvme/target/admin-cmd.c b/drivers/nvme/target/admin-cmd.c index d1afcfd89aa3..b2ba95b2eef7 100644 --- a/drivers/nvme/target/admin-cmd.c +++ b/drivers/nvme/target/admin-cmd.c @@ -45,6 +45,10 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, return NVME_SC_INVALID_NS; } + /* we don't have the right data for file backed ns */ + if (!ns->bdev) + goto out; + host_reads = part_stat_read(ns->bdev->bd_part, ios[READ]); data_units_read = part_stat_read(ns->bdev->bd_part, sectors[READ]); host_writes = part_stat_read(ns->bdev->bd_part, ios[WRITE]); @@ -54,6 +58,7 @@ static u16 nvmet_get_smart_log_nsid(struct nvmet_req *req, put_unaligned_le64(data_units_read, &slog->data_units_read[0]); put_unaligned_le64(host_writes, &slog->host_writes[0]); put_unaligned_le64(data_units_written, &slog->data_units_written[0]); +out: nvmet_put_namespace(ns); return NVME_SC_SUCCESS; @@ -71,6 +76,9 @@ static u16 nvmet_get_smart_log_all(struct nvmet_req *req, rcu_read_lock(); list_for_each_entry_rcu(ns, &ctrl->subsys->namespaces, dev_link) { + /* we don't have the right data for file backed ns */ + if (!ns->bdev) + continue; host_reads += part_stat_read(ns->bdev->bd_part, ios[READ]); data_units_read += part_stat_read(ns->bdev->bd_part, sectors[READ]); |