From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@lists.01.org
Cc: axboe@kernel.dk, boaz@plexistor.com, toshi.kani@hp.com,
Vishal Verma <vishal.l.verma@linux.intel.com>,
linux-kernel@vger.kernel.org, mingo@kernel.org,
linux-acpi@vger.kernel.org, linux-fsdevel@vger.kernel.org,
hch@lst.de
Subject: [PATCH v2 07/17] libnvdimm, btt: add support for blk integrity
Date: Thu, 25 Jun 2015 05:36:56 -0400 [thread overview]
Message-ID: <20150625093656.40066.36199.stgit@dwillia2-desk3.jf.intel.com> (raw)
In-Reply-To: <20150625090554.40066.69562.stgit@dwillia2-desk3.jf.intel.com>
From: Vishal Verma <vishal.l.verma@intel.com>
Support multiple block sizes (sector + metadata) using the blk integrity
framework. This registers a new integrity template that defines the
protection information tuple size based on the configured metadata size,
and simply acts as a passthrough for protection information generated by
another layer. The metadata is written to the storage as-is, and read back
with each sector.
Signed-off-by: Vishal Verma <vishal.l.verma@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/nvdimm/btt.c | 129 +++++++++++++++++++++++++++++++++++++++------
drivers/nvdimm/btt.h | 2 -
drivers/nvdimm/btt_devs.c | 3 +
drivers/nvdimm/core.c | 37 +++++++++++++
drivers/nvdimm/nd.h | 1
5 files changed, 154 insertions(+), 18 deletions(-)
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 7ae38aac2c25..18a2463c2300 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -837,6 +837,11 @@ static int btt_meta_init(struct btt *btt)
return ret;
}
+static u32 btt_meta_size(struct btt *btt)
+{
+ return btt->lbasize - btt->sector_size;
+}
+
/*
* This function calculates the arena in which the given LBA lies
* by doing a linear walk. This is acceptable since we expect only
@@ -921,8 +926,63 @@ static void zero_fill_data(struct page *page, unsigned int off, u32 len)
kunmap_atomic(mem);
}
-static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
- sector_t sector, unsigned int len)
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
+ struct arena_info *arena, u32 postmap, int rw)
+{
+ unsigned int len = btt_meta_size(btt);
+ u64 meta_nsoff;
+ int ret = 0;
+
+ if (bip == NULL)
+ return 0;
+
+ meta_nsoff = to_namespace_offset(arena, postmap) + btt->sector_size;
+
+ while (len) {
+ unsigned int cur_len;
+ struct bio_vec bv;
+ void *mem;
+
+ bv = bvec_iter_bvec(bip->bip_vec, bip->bip_iter);
+ /*
+ * The 'bv' obtained from bvec_iter_bvec has its .bv_len and
+ * .bv_offset already adjusted for iter->bi_bvec_done, and we
+ * can use those directly
+ */
+
+ cur_len = min(len, bv.bv_len);
+ mem = kmap_atomic(bv.bv_page);
+ if (rw)
+ ret = arena_write_bytes(arena, meta_nsoff,
+ mem + bv.bv_offset, cur_len);
+ else
+ ret = arena_read_bytes(arena, meta_nsoff,
+ mem + bv.bv_offset, cur_len);
+
+ kunmap_atomic(mem);
+ if (ret)
+ return ret;
+
+ len -= cur_len;
+ meta_nsoff += cur_len;
+ bvec_iter_advance(bip->bip_vec, &bip->bip_iter, cur_len);
+ }
+
+ return ret;
+}
+
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
+ struct arena_info *arena, u32 postmap, int rw)
+{
+ return 0;
+}
+#endif
+
+static int btt_read_pg(struct btt *btt, struct bio_integrity_payload *bip,
+ struct page *page, unsigned int off, sector_t sector,
+ unsigned int len)
{
int ret = 0;
int t_flag, e_flag;
@@ -984,6 +1044,12 @@ static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
if (ret)
goto out_rtt;
+ if (bip) {
+ ret = btt_rw_integrity(btt, bip, arena, postmap, READ);
+ if (ret)
+ goto out_rtt;
+ }
+
arena->rtt[lane] = RTT_INVALID;
nd_region_release_lane(btt->nd_region, lane);
@@ -1001,8 +1067,9 @@ static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
return ret;
}
-static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
- unsigned int off, unsigned int len)
+static int btt_write_pg(struct btt *btt, struct bio_integrity_payload *bip,
+ sector_t sector, struct page *page, unsigned int off,
+ unsigned int len)
{
int ret = 0;
struct arena_info *arena = NULL;
@@ -1036,12 +1103,19 @@ static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
if (new_postmap >= arena->internal_nlba) {
ret = -EIO;
goto out_lane;
- } else
- ret = btt_data_write(arena, new_postmap, page,
- off, cur_len);
+ }
+
+ ret = btt_data_write(arena, new_postmap, page, off, cur_len);
if (ret)
goto out_lane;
+ if (bip) {
+ ret = btt_rw_integrity(btt, bip, arena, new_postmap,
+ WRITE);
+ if (ret)
+ goto out_lane;
+ }
+
lock_map(arena, premap);
ret = btt_map_read(arena, premap, &old_postmap, NULL, NULL);
if (ret)
@@ -1081,18 +1155,18 @@ static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
return ret;
}
-static int btt_do_bvec(struct btt *btt, struct page *page,
- unsigned int len, unsigned int off, int rw,
- sector_t sector)
+static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
+ struct page *page, unsigned int len, unsigned int off,
+ int rw, sector_t sector)
{
int ret;
if (rw == READ) {
- ret = btt_read_pg(btt, page, off, sector, len);
+ ret = btt_read_pg(btt, bip, page, off, sector, len);
flush_dcache_page(page);
} else {
flush_dcache_page(page);
- ret = btt_write_pg(btt, sector, page, off, len);
+ ret = btt_write_pg(btt, bip, sector, page, off, len);
}
return ret;
@@ -1100,11 +1174,23 @@ static int btt_do_bvec(struct btt *btt, struct page *page,
static void btt_make_request(struct request_queue *q, struct bio *bio)
{
+ struct bio_integrity_payload *bip = bio_integrity(bio);
struct btt *btt = q->queuedata;
struct bvec_iter iter;
struct bio_vec bvec;
int err = 0, rw;
+ /*
+ * bio_integrity_enabled also checks if the bio already has an
+ * integrity payload attached. If it does, we *don't* do a
+ * bio_integrity_prep here - the payload has been generated by
+ * another kernel subsystem, and we just pass it through.
+ */
+ if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
+ err = -EIO;
+ goto out;
+ }
+
rw = bio_data_dir(bio);
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
@@ -1115,7 +1201,7 @@ static void btt_make_request(struct request_queue *q, struct bio *bio)
BUG_ON(len < btt->sector_size);
BUG_ON(len % btt->sector_size);
- err = btt_do_bvec(btt, bvec.bv_page, len, bvec.bv_offset,
+ err = btt_do_bvec(btt, bip, bvec.bv_page, len, bvec.bv_offset,
rw, iter.bi_sector);
if (err) {
dev_info(&btt->nd_btt->dev,
@@ -1135,7 +1221,7 @@ static int btt_rw_page(struct block_device *bdev, sector_t sector,
{
struct btt *btt = bdev->bd_disk->private_data;
- btt_do_bvec(btt, page, PAGE_CACHE_SIZE, 0, rw, sector);
+ btt_do_bvec(btt, NULL, page, PAGE_CACHE_SIZE, 0, rw, sector);
page_endio(page, rw & WRITE, 0);
return 0;
}
@@ -1188,15 +1274,26 @@ static int btt_blk_init(struct btt *btt)
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, btt->btt_queue);
btt->btt_queue->queuedata = btt;
- set_capacity(btt->btt_disk,
- btt->nlba * btt->sector_size >> SECTOR_SHIFT);
+ set_capacity(btt->btt_disk, 0);
add_disk(btt->btt_disk);
+ if (btt_meta_size(btt)) {
+ int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
+
+ if (rc) {
+ del_gendisk(btt->btt_disk);
+ put_disk(btt->btt_disk);
+ blk_cleanup_queue(btt->btt_queue);
+ return rc;
+ }
+ }
+ set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
return 0;
}
static void btt_blk_cleanup(struct btt *btt)
{
+ blk_integrity_unregister(btt->btt_disk);
del_gendisk(btt->btt_disk);
put_disk(btt->btt_disk);
blk_cleanup_queue(btt->btt_queue);
diff --git a/drivers/nvdimm/btt.h b/drivers/nvdimm/btt.h
index 8c95a7792c3e..2caa0ef7e67a 100644
--- a/drivers/nvdimm/btt.h
+++ b/drivers/nvdimm/btt.h
@@ -31,7 +31,7 @@
#define ARENA_MAX_SIZE (1ULL << 39) /* 512 GB */
#define RTT_VALID (1UL << 31)
#define RTT_INVALID 0
-#define INT_LBASIZE_ALIGNMENT 256
+#define INT_LBASIZE_ALIGNMENT 64
#define BTT_PG_SIZE 4096
#define BTT_DEFAULT_NFREE ND_MAX_LANES
#define LOG_SEQ_INIT 1
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c
index cde9f075fcea..b6724cfbcfca 100644
--- a/drivers/nvdimm/btt_devs.c
+++ b/drivers/nvdimm/btt_devs.c
@@ -104,7 +104,8 @@ struct nd_btt *to_nd_btt(struct device *dev)
}
EXPORT_SYMBOL(to_nd_btt);
-static const unsigned long btt_lbasize_supported[] = { 512, 4096, 0 };
+static const unsigned long btt_lbasize_supported[] = { 512, 520, 528,
+ 4096, 4104, 4160, 4224, 0 };
static ssize_t sector_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index dd824d7c2669..1d96b9a6e4cc 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -13,6 +13,7 @@
#include <linux/libnvdimm.h>
#include <linux/export.h>
#include <linux/module.h>
+#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/ndctl.h>
@@ -361,6 +362,42 @@ void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus)
}
EXPORT_SYMBOL_GPL(nvdimm_bus_unregister);
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static int nd_pi_nop_generate_verify(struct blk_integrity_iter *iter)
+{
+ return 0;
+}
+
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
+{
+ struct blk_integrity integrity = {
+ .name = "ND-PI-NOP",
+ .generate_fn = nd_pi_nop_generate_verify,
+ .verify_fn = nd_pi_nop_generate_verify,
+ .tuple_size = meta_size,
+ .tag_size = meta_size,
+ };
+ int ret;
+
+ ret = blk_integrity_register(disk, &integrity);
+ if (ret)
+ return ret;
+
+ blk_queue_max_integrity_segments(disk->queue, 1);
+
+ return 0;
+}
+EXPORT_SYMBOL(nd_integrity_init);
+
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
+{
+ return 0;
+}
+EXPORT_SYMBOL(nd_integrity_init);
+
+#endif
+
static __init int libnvdimm_init(void)
{
int rc;
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index d7fc6ef4e4d8..6a969a885d70 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -135,6 +135,7 @@ enum nd_async_mode {
ND_ASYNC,
};
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
void wait_nvdimm_bus_probe_idle(struct device *dev);
void nd_device_register(struct device *dev);
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
WARNING: multiple messages have this Message-ID (diff)
From: Dan Williams <dan.j.williams@intel.com>
To: linux-nvdimm@ml01.01.org
Cc: axboe@kernel.dk, boaz@plexistor.com, toshi.kani@hp.com,
Vishal Verma <vishal.l.verma@linux.intel.com>,
linux-kernel@vger.kernel.org, mingo@kernel.org,
linux-acpi@vger.kernel.org, linux-fsdevel@vger.kernel.org,
hch@lst.de
Subject: [PATCH v2 07/17] libnvdimm, btt: add support for blk integrity
Date: Thu, 25 Jun 2015 05:36:56 -0400 [thread overview]
Message-ID: <20150625093656.40066.36199.stgit@dwillia2-desk3.jf.intel.com> (raw)
In-Reply-To: <20150625090554.40066.69562.stgit@dwillia2-desk3.jf.intel.com>
From: Vishal Verma <vishal.l.verma@intel.com>
Support multiple block sizes (sector + metadata) using the blk integrity
framework. This registers a new integrity template that defines the
protection information tuple size based on the configured metadata size,
and simply acts as a passthrough for protection information generated by
another layer. The metadata is written to the storage as-is, and read back
with each sector.
Signed-off-by: Vishal Verma <vishal.l.verma@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
---
drivers/nvdimm/btt.c | 129 +++++++++++++++++++++++++++++++++++++++------
drivers/nvdimm/btt.h | 2 -
drivers/nvdimm/btt_devs.c | 3 +
drivers/nvdimm/core.c | 37 +++++++++++++
drivers/nvdimm/nd.h | 1
5 files changed, 154 insertions(+), 18 deletions(-)
diff --git a/drivers/nvdimm/btt.c b/drivers/nvdimm/btt.c
index 7ae38aac2c25..18a2463c2300 100644
--- a/drivers/nvdimm/btt.c
+++ b/drivers/nvdimm/btt.c
@@ -837,6 +837,11 @@ static int btt_meta_init(struct btt *btt)
return ret;
}
+static u32 btt_meta_size(struct btt *btt)
+{
+ return btt->lbasize - btt->sector_size;
+}
+
/*
* This function calculates the arena in which the given LBA lies
* by doing a linear walk. This is acceptable since we expect only
@@ -921,8 +926,63 @@ static void zero_fill_data(struct page *page, unsigned int off, u32 len)
kunmap_atomic(mem);
}
-static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
- sector_t sector, unsigned int len)
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
+ struct arena_info *arena, u32 postmap, int rw)
+{
+ unsigned int len = btt_meta_size(btt);
+ u64 meta_nsoff;
+ int ret = 0;
+
+ if (bip == NULL)
+ return 0;
+
+ meta_nsoff = to_namespace_offset(arena, postmap) + btt->sector_size;
+
+ while (len) {
+ unsigned int cur_len;
+ struct bio_vec bv;
+ void *mem;
+
+ bv = bvec_iter_bvec(bip->bip_vec, bip->bip_iter);
+ /*
+ * The 'bv' obtained from bvec_iter_bvec has its .bv_len and
+ * .bv_offset already adjusted for iter->bi_bvec_done, and we
+ * can use those directly
+ */
+
+ cur_len = min(len, bv.bv_len);
+ mem = kmap_atomic(bv.bv_page);
+ if (rw)
+ ret = arena_write_bytes(arena, meta_nsoff,
+ mem + bv.bv_offset, cur_len);
+ else
+ ret = arena_read_bytes(arena, meta_nsoff,
+ mem + bv.bv_offset, cur_len);
+
+ kunmap_atomic(mem);
+ if (ret)
+ return ret;
+
+ len -= cur_len;
+ meta_nsoff += cur_len;
+ bvec_iter_advance(bip->bip_vec, &bip->bip_iter, cur_len);
+ }
+
+ return ret;
+}
+
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+static int btt_rw_integrity(struct btt *btt, struct bio_integrity_payload *bip,
+ struct arena_info *arena, u32 postmap, int rw)
+{
+ return 0;
+}
+#endif
+
+static int btt_read_pg(struct btt *btt, struct bio_integrity_payload *bip,
+ struct page *page, unsigned int off, sector_t sector,
+ unsigned int len)
{
int ret = 0;
int t_flag, e_flag;
@@ -984,6 +1044,12 @@ static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
if (ret)
goto out_rtt;
+ if (bip) {
+ ret = btt_rw_integrity(btt, bip, arena, postmap, READ);
+ if (ret)
+ goto out_rtt;
+ }
+
arena->rtt[lane] = RTT_INVALID;
nd_region_release_lane(btt->nd_region, lane);
@@ -1001,8 +1067,9 @@ static int btt_read_pg(struct btt *btt, struct page *page, unsigned int off,
return ret;
}
-static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
- unsigned int off, unsigned int len)
+static int btt_write_pg(struct btt *btt, struct bio_integrity_payload *bip,
+ sector_t sector, struct page *page, unsigned int off,
+ unsigned int len)
{
int ret = 0;
struct arena_info *arena = NULL;
@@ -1036,12 +1103,19 @@ static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
if (new_postmap >= arena->internal_nlba) {
ret = -EIO;
goto out_lane;
- } else
- ret = btt_data_write(arena, new_postmap, page,
- off, cur_len);
+ }
+
+ ret = btt_data_write(arena, new_postmap, page, off, cur_len);
if (ret)
goto out_lane;
+ if (bip) {
+ ret = btt_rw_integrity(btt, bip, arena, new_postmap,
+ WRITE);
+ if (ret)
+ goto out_lane;
+ }
+
lock_map(arena, premap);
ret = btt_map_read(arena, premap, &old_postmap, NULL, NULL);
if (ret)
@@ -1081,18 +1155,18 @@ static int btt_write_pg(struct btt *btt, sector_t sector, struct page *page,
return ret;
}
-static int btt_do_bvec(struct btt *btt, struct page *page,
- unsigned int len, unsigned int off, int rw,
- sector_t sector)
+static int btt_do_bvec(struct btt *btt, struct bio_integrity_payload *bip,
+ struct page *page, unsigned int len, unsigned int off,
+ int rw, sector_t sector)
{
int ret;
if (rw == READ) {
- ret = btt_read_pg(btt, page, off, sector, len);
+ ret = btt_read_pg(btt, bip, page, off, sector, len);
flush_dcache_page(page);
} else {
flush_dcache_page(page);
- ret = btt_write_pg(btt, sector, page, off, len);
+ ret = btt_write_pg(btt, bip, sector, page, off, len);
}
return ret;
@@ -1100,11 +1174,23 @@ static int btt_do_bvec(struct btt *btt, struct page *page,
static void btt_make_request(struct request_queue *q, struct bio *bio)
{
+ struct bio_integrity_payload *bip = bio_integrity(bio);
struct btt *btt = q->queuedata;
struct bvec_iter iter;
struct bio_vec bvec;
int err = 0, rw;
+ /*
+ * bio_integrity_enabled also checks if the bio already has an
+ * integrity payload attached. If it does, we *don't* do a
+ * bio_integrity_prep here - the payload has been generated by
+ * another kernel subsystem, and we just pass it through.
+ */
+ if (bio_integrity_enabled(bio) && bio_integrity_prep(bio)) {
+ err = -EIO;
+ goto out;
+ }
+
rw = bio_data_dir(bio);
bio_for_each_segment(bvec, bio, iter) {
unsigned int len = bvec.bv_len;
@@ -1115,7 +1201,7 @@ static void btt_make_request(struct request_queue *q, struct bio *bio)
BUG_ON(len < btt->sector_size);
BUG_ON(len % btt->sector_size);
- err = btt_do_bvec(btt, bvec.bv_page, len, bvec.bv_offset,
+ err = btt_do_bvec(btt, bip, bvec.bv_page, len, bvec.bv_offset,
rw, iter.bi_sector);
if (err) {
dev_info(&btt->nd_btt->dev,
@@ -1135,7 +1221,7 @@ static int btt_rw_page(struct block_device *bdev, sector_t sector,
{
struct btt *btt = bdev->bd_disk->private_data;
- btt_do_bvec(btt, page, PAGE_CACHE_SIZE, 0, rw, sector);
+ btt_do_bvec(btt, NULL, page, PAGE_CACHE_SIZE, 0, rw, sector);
page_endio(page, rw & WRITE, 0);
return 0;
}
@@ -1188,15 +1274,26 @@ static int btt_blk_init(struct btt *btt)
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, btt->btt_queue);
btt->btt_queue->queuedata = btt;
- set_capacity(btt->btt_disk,
- btt->nlba * btt->sector_size >> SECTOR_SHIFT);
+ set_capacity(btt->btt_disk, 0);
add_disk(btt->btt_disk);
+ if (btt_meta_size(btt)) {
+ int rc = nd_integrity_init(btt->btt_disk, btt_meta_size(btt));
+
+ if (rc) {
+ del_gendisk(btt->btt_disk);
+ put_disk(btt->btt_disk);
+ blk_cleanup_queue(btt->btt_queue);
+ return rc;
+ }
+ }
+ set_capacity(btt->btt_disk, btt->nlba * btt->sector_size >> 9);
return 0;
}
static void btt_blk_cleanup(struct btt *btt)
{
+ blk_integrity_unregister(btt->btt_disk);
del_gendisk(btt->btt_disk);
put_disk(btt->btt_disk);
blk_cleanup_queue(btt->btt_queue);
diff --git a/drivers/nvdimm/btt.h b/drivers/nvdimm/btt.h
index 8c95a7792c3e..2caa0ef7e67a 100644
--- a/drivers/nvdimm/btt.h
+++ b/drivers/nvdimm/btt.h
@@ -31,7 +31,7 @@
#define ARENA_MAX_SIZE (1ULL << 39) /* 512 GB */
#define RTT_VALID (1UL << 31)
#define RTT_INVALID 0
-#define INT_LBASIZE_ALIGNMENT 256
+#define INT_LBASIZE_ALIGNMENT 64
#define BTT_PG_SIZE 4096
#define BTT_DEFAULT_NFREE ND_MAX_LANES
#define LOG_SEQ_INIT 1
diff --git a/drivers/nvdimm/btt_devs.c b/drivers/nvdimm/btt_devs.c
index cde9f075fcea..b6724cfbcfca 100644
--- a/drivers/nvdimm/btt_devs.c
+++ b/drivers/nvdimm/btt_devs.c
@@ -104,7 +104,8 @@ struct nd_btt *to_nd_btt(struct device *dev)
}
EXPORT_SYMBOL(to_nd_btt);
-static const unsigned long btt_lbasize_supported[] = { 512, 4096, 0 };
+static const unsigned long btt_lbasize_supported[] = { 512, 520, 528,
+ 4096, 4104, 4160, 4224, 0 };
static ssize_t sector_size_show(struct device *dev,
struct device_attribute *attr, char *buf)
diff --git a/drivers/nvdimm/core.c b/drivers/nvdimm/core.c
index dd824d7c2669..1d96b9a6e4cc 100644
--- a/drivers/nvdimm/core.c
+++ b/drivers/nvdimm/core.c
@@ -13,6 +13,7 @@
#include <linux/libnvdimm.h>
#include <linux/export.h>
#include <linux/module.h>
+#include <linux/blkdev.h>
#include <linux/device.h>
#include <linux/ctype.h>
#include <linux/ndctl.h>
@@ -361,6 +362,42 @@ void nvdimm_bus_unregister(struct nvdimm_bus *nvdimm_bus)
}
EXPORT_SYMBOL_GPL(nvdimm_bus_unregister);
+#ifdef CONFIG_BLK_DEV_INTEGRITY
+static int nd_pi_nop_generate_verify(struct blk_integrity_iter *iter)
+{
+ return 0;
+}
+
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
+{
+ struct blk_integrity integrity = {
+ .name = "ND-PI-NOP",
+ .generate_fn = nd_pi_nop_generate_verify,
+ .verify_fn = nd_pi_nop_generate_verify,
+ .tuple_size = meta_size,
+ .tag_size = meta_size,
+ };
+ int ret;
+
+ ret = blk_integrity_register(disk, &integrity);
+ if (ret)
+ return ret;
+
+ blk_queue_max_integrity_segments(disk->queue, 1);
+
+ return 0;
+}
+EXPORT_SYMBOL(nd_integrity_init);
+
+#else /* CONFIG_BLK_DEV_INTEGRITY */
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size)
+{
+ return 0;
+}
+EXPORT_SYMBOL(nd_integrity_init);
+
+#endif
+
static __init int libnvdimm_init(void)
{
int rc;
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index d7fc6ef4e4d8..6a969a885d70 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -135,6 +135,7 @@ enum nd_async_mode {
ND_ASYNC,
};
+int nd_integrity_init(struct gendisk *disk, unsigned long meta_size);
void wait_nvdimm_bus_probe_idle(struct device *dev);
void nd_device_register(struct device *dev);
void nd_device_unregister(struct device *dev, enum nd_async_mode mode);
next prev parent reply other threads:[~2015-06-25 9:36 UTC|newest]
Thread overview: 70+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-06-25 9:36 [PATCH v2 00/17] libnvdimm: ->rw_bytes(), BLK, BTT, PMEM api, and unit tests Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 01/17] libnvdimm: infrastructure for btt devices Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 02/17] nd_btt: atomic sector updates Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 03/17] libnvdimm, nfit, nd_blk: driver for BLK-mode access persistent memory Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 04/17] tools/testing/nvdimm: libnvdimm unit test infrastructure Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 05/17] libnvdimm: Non-Volatile Devices Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` [PATCH v2 06/17] fs/block_dev.c: skip rw_page if bdev has integrity Dan Williams
2015-06-25 9:36 ` Dan Williams
2015-06-25 9:36 ` Dan Williams [this message]
2015-06-25 9:36 ` [PATCH v2 07/17] libnvdimm, btt: add support for blk integrity Dan Williams
2015-06-25 9:37 ` [PATCH v2 08/17] libnvdimm, blk: " Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 09/17] libnvdimm, pmem: fix up max_hw_sectors Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 10/17] pmem: make_request cleanups Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 11/17] libnvdimm: enable iostat Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 12/17] pmem: flag pmem block devices as non-rotational Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 13/17] libnvdimm, nfit: handle unarmed dimms, mark namespaces read-only Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 14/17] acpi: Add acpi_map_pxm_to_online_node() Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 15/17] libnvdimm: Set numa_node to NVDIMM devices Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-25 17:45 ` Toshi Kani
2015-06-25 17:45 ` Toshi Kani
2015-06-25 17:47 ` Dan Williams
2015-06-25 17:47 ` Dan Williams
2015-06-25 18:34 ` Williams, Dan J
2015-06-25 18:34 ` Williams, Dan J
2015-06-25 21:31 ` Dan Williams
2015-06-25 21:31 ` Dan Williams
2015-06-25 21:51 ` Toshi Kani
2015-06-25 21:51 ` Toshi Kani
2015-06-25 22:00 ` Dan Williams
2015-06-25 22:00 ` Dan Williams
2015-06-25 22:11 ` Toshi Kani
2015-06-25 22:11 ` Toshi Kani
2015-06-25 22:34 ` Dan Williams
2015-06-25 22:34 ` Dan Williams
2015-06-25 22:55 ` Toshi Kani
2015-06-25 22:55 ` Toshi Kani
2015-06-25 23:42 ` Williams, Dan J
2015-06-25 23:42 ` Williams, Dan J
2015-06-26 0:55 ` Toshi Kani
2015-06-26 0:55 ` Toshi Kani
2015-06-26 1:08 ` Dan Williams
2015-06-26 1:08 ` Dan Williams
2015-06-26 1:21 ` Toshi Kani
2015-06-26 1:21 ` Toshi Kani
2015-06-25 9:37 ` [PATCH v2 16/17] libnvdimm: Add sysfs " Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-26 2:21 ` Toshi Kani
2015-06-26 2:21 ` Toshi Kani
2015-06-26 15:26 ` Dan Williams
2015-06-26 15:26 ` Dan Williams
2015-06-25 9:37 ` [PATCH v2 17/17] arch, x86: pmem api for ensuring durability of persistent memory updates Dan Williams
2015-06-25 9:37 ` Dan Williams
2015-06-30 10:21 ` Dan Carpenter
2015-06-30 16:23 ` Williams, Dan J
2015-06-30 16:23 ` Williams, Dan J
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