From: Coly Li <colyli@suse.de>
To: linux-bcache@vger.kernel.org
Cc: linux-block@vger.kernel.org, linux-nvdimm@lists.01.org,
axboe@kernel.dk, jianpeng.ma@intel.com, qiaowei.ren@intel.com,
hare@suse.com, jack@suse.cz, dan.j.williams@intel.com,
Coly Li <colyli@suse.de>
Subject: [PATCH v7 13/16] bcache: add sysfs interface register_nvdimm_meta to register NVDIMM meta device
Date: Sat, 10 Apr 2021 00:43:40 +0800 [thread overview]
Message-ID: <20210409164343.56828-14-colyli@suse.de> (raw)
In-Reply-To: <20210409164343.56828-1-colyli@suse.de>
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 9640bfb85571..d95a9a3c2041 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -2436,10 +2436,18 @@ 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);
+#ifdef 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);
+#ifdef CONFIG_BCACHE_NVM_PAGES
+kobj_attribute_write(register_nvdimm_meta, register_nvdimm_meta);
+#endif
static bool bch_is_open_backing(dev_t dev)
{
@@ -2553,6 +2561,24 @@ static void register_device_async(struct async_reg_args *args)
queue_delayed_work(system_wq, &args->reg_work, 10);
}
+#ifdef 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)
{
@@ -2888,6 +2914,9 @@ static int __init bcache_init(void)
static const struct attribute *files[] = {
&ksysfs_register.attr,
&ksysfs_register_quiet.attr,
+#ifdef CONFIG_BCACHE_NVM_PAGES
+ &ksysfs_register_nvdimm_meta.attr,
+#endif
&ksysfs_pendings_cleanup.attr,
NULL
};
--
2.26.2
next prev parent reply other threads:[~2021-04-09 16:45 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-09 16:43 [PATCH v7 00/16] bcache: support NVDIMM for journaling Coly Li
2021-04-09 16:43 ` [PATCH v7 01/16] bcache: add initial data structures for nvm pages Coly Li
2021-04-09 16:43 ` [PATCH v7 02/16] bcache: initialize the nvm pages allocator Coly Li
2021-04-09 16:43 ` [PATCH v7 03/16] bcache: initialization of the buddy Coly Li
2021-04-09 16:43 ` [PATCH v7 04/16] bcache: bch_nvm_alloc_pages() " Coly Li
2021-04-09 16:43 ` [PATCH v7 05/16] bcache: bch_nvm_free_pages() " Coly Li
2021-04-09 16:43 ` [PATCH v7 06/16] bcache: get allocated pages from specific owner Coly Li
2021-04-09 16:43 ` [PATCH v7 07/16] bcache: nvm-pages fixes for bcache integration testing Coly Li
2021-04-09 16:43 ` [PATCH v7 08/16] bcache: use bucket index to set GC_MARK_METADATA for journal buckets in bch_btree_gc_finish() Coly Li
2021-04-09 16:43 ` [PATCH v7 09/16] bcache: add BCH_FEATURE_INCOMPAT_NVDIMM_META into incompat feature set Coly Li
2021-04-09 16:43 ` [PATCH v7 10/16] bcache: initialize bcache journal for NVDIMM meta device Coly Li
2021-04-09 16:43 ` [PATCH v7 11/16] bcache: support storing bcache journal into " Coly Li
2021-04-09 16:43 ` [PATCH v7 12/16] bcache: read jset from NVDIMM pages for journal replay Coly Li
2021-04-09 16:43 ` Coly Li [this message]
2021-04-09 16:43 ` [PATCH v7 14/16] bcache: use div_u64() in init_owner_info() Coly Li
2021-04-09 16:43 ` [PATCH v7 15/16] bcache: fix BCACHE_NVM_PAGES' dependences in Kconfig Coly Li
2021-04-09 16:43 ` [PATCH v7 16/16] bcache: more fix for compiling error when BCACHE_NVM_PAGES disabled Coly Li
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