From: Hannes Reinecke <hare@suse.de>
To: Coly Li <colyli@suse.de>, axboe@kernel.dk
Cc: linux-bcache@vger.kernel.org, linux-block@vger.kernel.org,
Jianpeng Ma <jianpeng.ma@intel.com>,
Qiaowei Ren <qiaowei.ren@intel.com>
Subject: Re: [PATCH 14/14] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device
Date: Tue, 22 Jun 2021 13:04:32 +0200 [thread overview]
Message-ID: <d85d87f1-5a3d-9e20-7275-1aab7b8a6711@suse.de> (raw)
In-Reply-To: <20210615054921.101421-15-colyli@suse.de>
On 6/15/21 7:49 AM, Coly Li wrote:
> This patch adds a sysfs interface register_nvdimm_meta to register
> NVDIMM meta device. The sysfs interface file only shows up when
> CONFIG_BCACHE_NVM_PAGES=y. Then a NVDIMM name space formatted by
> bcache-tools can be registered into bcache by e.g.,
> echo /dev/pmem0 > /sys/fs/bcache/register_nvdimm_meta
>
> Signed-off-by: Coly Li <colyli@suse.de>
> Cc: Jianpeng Ma <jianpeng.ma@intel.com>
> Cc: Qiaowei Ren <qiaowei.ren@intel.com>
> ---
> drivers/md/bcache/super.c | 29 +++++++++++++++++++++++++++++
> 1 file changed, 29 insertions(+)
>
> diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
> index 4d6666d03aa7..9d506d053548 100644
> --- a/drivers/md/bcache/super.c
> +++ b/drivers/md/bcache/super.c
> @@ -2439,10 +2439,18 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
> static ssize_t bch_pending_bdevs_cleanup(struct kobject *k,
> struct kobj_attribute *attr,
> const char *buffer, size_t size);
> +#if defined(CONFIG_BCACHE_NVM_PAGES)
> +static ssize_t register_nvdimm_meta(struct kobject *k,
> + struct kobj_attribute *attr,
> + const char *buffer, size_t size);
> +#endif
>
> kobj_attribute_write(register, register_bcache);
> kobj_attribute_write(register_quiet, register_bcache);
> kobj_attribute_write(pendings_cleanup, bch_pending_bdevs_cleanup);
> +#if defined(CONFIG_BCACHE_NVM_PAGES)
> +kobj_attribute_write(register_nvdimm_meta, register_nvdimm_meta);
> +#endif
>
> static bool bch_is_open_backing(dev_t dev)
> {
> @@ -2556,6 +2564,24 @@ static void register_device_async(struct async_reg_args *args)
> queue_delayed_work(system_wq, &args->reg_work, 10);
> }
>
> +#if defined(CONFIG_BCACHE_NVM_PAGES)
> +static ssize_t register_nvdimm_meta(struct kobject *k, struct kobj_attribute *attr,
> + const char *buffer, size_t size)
> +{
> + ssize_t ret = size;
> +
> + struct bch_nvm_namespace *ns = bch_register_namespace(buffer);
> +
> + if (IS_ERR(ns)) {
> + pr_err("register nvdimm namespace %s for meta device failed.\n",
> + buffer);
> + ret = -EINVAL;
> + }
> +
> + return ret;
> +}
> +#endif
> +
> static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
> const char *buffer, size_t size)
> {
> @@ -2898,6 +2924,9 @@ static int __init bcache_init(void)
> static const struct attribute *files[] = {
> &ksysfs_register.attr,
> &ksysfs_register_quiet.attr,
> +#if defined(CONFIG_BCACHE_NVM_PAGES)
> + &ksysfs_register_nvdimm_meta.attr,
> +#endif
> &ksysfs_pendings_cleanup.attr,
> NULL
> };
>
Reviewed-by: Hannes Reinecke <hare@suse.de>
Cheers,
Hannes
--
Dr. Hannes Reinecke Kernel Storage Architect
hare@suse.de +49 911 74053 688
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg
HRB 36809 (AG Nürnberg), GF: Felix Imendörffer
next prev parent reply other threads:[~2021-06-22 11:04 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-15 5:49 [PATCH 00/14] bcache patches for Linux v5.14 Coly Li
2021-06-15 5:49 ` [PATCH 01/14] bcache: fix error info in register_bcache() Coly Li
2021-06-22 9:47 ` Hannes Reinecke
2021-06-15 5:49 ` [PATCH 02/14] md: bcache: Fix spelling of 'acquire' Coly Li
2021-06-22 10:03 ` Hannes Reinecke
2021-06-15 5:49 ` [PATCH 03/14] bcache: add initial data structures for nvm pages Coly Li
2021-06-21 16:17 ` Ask help for code review (was Re: [PATCH 03/14] bcache: add initial data structures for nvm pages) Coly Li
2021-06-22 8:41 ` Huang, Ying
2021-06-23 4:32 ` Coly Li
2021-06-23 6:53 ` Huang, Ying
2021-06-23 7:04 ` Christoph Hellwig
2021-06-23 7:19 ` Coly Li
2021-06-23 7:21 ` Christoph Hellwig
2021-06-23 10:05 ` Coly Li
2021-06-23 11:16 ` Coly Li
2021-06-23 11:49 ` Christoph Hellwig
2021-06-23 12:09 ` Coly Li
2021-06-22 10:19 ` [PATCH 03/14] bcache: add initial data structures for nvm pages Hannes Reinecke
2021-06-23 7:09 ` Coly Li
2021-06-15 5:49 ` [PATCH 04/14] bcache: initialize the nvm pages allocator Coly Li
2021-06-22 10:39 ` Hannes Reinecke
2021-06-23 5:26 ` Coly Li
2021-06-23 9:16 ` Hannes Reinecke
2021-06-23 9:34 ` Coly Li
2021-06-15 5:49 ` [PATCH 05/14] bcache: initialization of the buddy Coly Li
2021-06-22 10:45 ` Hannes Reinecke
2021-06-23 5:35 ` Coly Li
2021-06-23 5:46 ` Re[2]: " Pavel Goran
2021-06-23 6:03 ` Coly Li
2021-06-15 5:49 ` [PATCH 06/14] bcache: bch_nvm_alloc_pages() " Coly Li
2021-06-22 10:51 ` Hannes Reinecke
2021-06-23 6:02 ` Coly Li
2021-06-15 5:49 ` [PATCH 07/14] bcache: bch_nvm_free_pages() " Coly Li
2021-06-22 10:53 ` Hannes Reinecke
2021-06-23 6:06 ` Coly Li
2021-06-15 5:49 ` [PATCH 08/14] bcache: get allocated pages from specific owner Coly Li
2021-06-22 10:54 ` Hannes Reinecke
2021-06-23 6:08 ` Coly Li
2021-06-15 5:49 ` [PATCH 09/14] bcache: use bucket index to set GC_MARK_METADATA for journal buckets in bch_btree_gc_finish() Coly Li
2021-06-22 10:55 ` Hannes Reinecke
2021-06-23 6:09 ` Coly Li
2021-06-15 5:49 ` [PATCH 10/14] bcache: add BCH_FEATURE_INCOMPAT_NVDIMM_META into incompat feature set Coly Li
2021-06-22 10:59 ` Hannes Reinecke
2021-06-23 6:09 ` Coly Li
2021-06-15 5:49 ` [PATCH 11/14] bcache: initialize bcache journal for NVDIMM meta device Coly Li
2021-06-22 11:01 ` Hannes Reinecke
2021-06-23 6:17 ` Coly Li
2021-06-23 9:20 ` Hannes Reinecke
2021-06-23 10:14 ` Coly Li
2021-06-15 5:49 ` [PATCH 12/14] bcache: support storing bcache journal into " Coly Li
2021-06-22 11:03 ` Hannes Reinecke
2021-06-23 6:19 ` Coly Li
2021-06-15 5:49 ` [PATCH 13/14] bcache: read jset from NVDIMM pages for journal replay Coly Li
2021-06-22 11:04 ` Hannes Reinecke
2021-06-23 6:21 ` Coly Li
2021-06-15 5:49 ` [PATCH 14/14] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device Coly Li
2021-06-22 11:04 ` Hannes Reinecke [this message]
2021-06-21 15:14 ` [PATCH 00/14] bcache patches for Linux v5.14 Jens Axboe
2021-06-21 15:25 ` Coly Li
2021-06-21 15:27 ` Jens Axboe
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