korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2024-11-15 08:14:15 +08:00
Code Issues Packages Projects Releases Wiki Activity

nvmet: add ns revalidation support

Browse Source 
Add support for detecting capacity changes on nvmet blockdev and file
backed namespaces. This allows for emulating and testing online resizing
of nvme devices and filesystems on top.

Signed-off-by: Anthony Iliopoulos <ailiop@suse.com>
[chaitanya: Fix comments posted on V1]
Signed-off-by: Chaitanya Kulkarni <chaitanya.kulkarni@wdc.com>
[hch: reuse code a bit more]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Anthony Iliopoulos 2020-04-19 16:48:50 -07:00 committed by Jens Axboe
parent 31fdad7be1
commit e8cd1ff11d
4 changed files with 25 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/nvme/target/admin-cmd.c
View File

@ -486,6 +486,11 @@ static void nvmet_execute_identify_ns(struct nvmet_req *req)
if (!ns)
goto done;
if (ns->bdev)
nvmet_bdev_ns_revalidate(ns);
else
nvmet_file_ns_revalidate(ns);
/*
* nuse = ncap = nsze isn't always true, but we have no way to find
* that out from the underlying device.

5
drivers/nvme/target/io-cmd-bdev.c
View File

@ -75,6 +75,11 @@ void nvmet_bdev_ns_disable(struct nvmet_ns *ns)
}
}
void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns)
{
ns->size = i_size_read(ns->bdev->bd_inode);
}
static u16 blk_to_nvme_status(struct nvmet_req *req, blk_status_t blk_sts)
{
u16 status = NVME_SC_SUCCESS;

17
drivers/nvme/target/io-cmd-file.c
View File

@ -13,6 +13,18 @@
#define NVMET_MAX_MPOOL_BVEC 16
#define NVMET_MIN_MPOOL_OBJ 16
int nvmet_file_ns_revalidate(struct nvmet_ns *ns)
{
struct kstat stat;
int ret;
ret = vfs_getattr(&ns->file->f_path, &stat, STATX_SIZE,
AT_STATX_FORCE_SYNC);
if (!ret)
ns->size = stat.size;
return ret;
}
void nvmet_file_ns_disable(struct nvmet_ns *ns)
{
if (ns->file) {
@ -30,7 +42,6 @@ void nvmet_file_ns_disable(struct nvmet_ns *ns)
int nvmet_file_ns_enable(struct nvmet_ns *ns)
{
int flags = O_RDWR | O_LARGEFILE;
struct kstat stat;
int ret;
if (!ns->buffered_io)
@ -43,12 +54,10 @@ int nvmet_file_ns_enable(struct nvmet_ns *ns)
return PTR_ERR(ns->file);
}
ret = vfs_getattr(&ns->file->f_path,
&stat, STATX_SIZE, AT_STATX_FORCE_SYNC);
ret = nvmet_file_ns_revalidate(ns);
if (ret)
goto err;
ns->size = stat.size;
/*
* i_blkbits can be greater than the universally accepted upper bound,
* so make sure we export a sane namespace lba_shift.

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

@ -498,6 +498,8 @@ void nvmet_file_ns_disable(struct nvmet_ns *ns);
u16 nvmet_bdev_flush(struct nvmet_req *req);
u16 nvmet_file_flush(struct nvmet_req *req);
void nvmet_ns_changed(struct nvmet_subsys *subsys, u32 nsid);
void nvmet_bdev_ns_revalidate(struct nvmet_ns *ns);
int nvmet_file_ns_revalidate(struct nvmet_ns *ns);
static inline u32 nvmet_rw_len(struct nvmet_req *req)
{