From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org
Cc: miklos@szeredi.hu, dgilbert@redhat.com, virtio-fs@redhat.com,
stefanha@redhat.com
Subject: [PATCH 01/19] dax: remove block device dependencies
Date: Wed, 21 Aug 2019 13:57:02 -0400 [thread overview]
Message-ID: <20190821175720.25901-2-vgoyal@redhat.com> (raw)
In-Reply-To: <20190821175720.25901-1-vgoyal@redhat.com>
From: Stefan Hajnoczi <stefanha@redhat.com>
Although struct dax_device itself is not tied to a block device, some
DAX code assumes there is a block device. Make block devices optional
by allowing bdev to be NULL in commonly used DAX APIs.
When there is no block device:
* Skip the partition offset calculation in bdev_dax_pgoff()
* Skip the blkdev_issue_zeroout() optimization
Note that more block device assumptions remain but I haven't reach those
code paths yet.
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
drivers/dax/super.c | 3 ++-
fs/dax.c | 7 ++++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 26a654dbc69a..3cbc97f3e653 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -46,7 +46,8 @@ EXPORT_SYMBOL_GPL(dax_read_unlock);
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
pgoff_t *pgoff)
{
- phys_addr_t phys_off = (get_start_sect(bdev) + sector) * 512;
+ sector_t start_sect = bdev ? get_start_sect(bdev) : 0;
+ phys_addr_t phys_off = (start_sect + sector) * 512;
if (pgoff)
*pgoff = PHYS_PFN(phys_off);
diff --git a/fs/dax.c b/fs/dax.c
index 6bf81f931de3..a11147bbaf9e 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1046,7 +1046,12 @@ static vm_fault_t dax_load_hole(struct xa_state *xas,
static bool dax_range_is_aligned(struct block_device *bdev,
unsigned int offset, unsigned int length)
{
- unsigned short sector_size = bdev_logical_block_size(bdev);
+ unsigned short sector_size;
+
+ if (!bdev)
+ return false;
+
+ sector_size = bdev_logical_block_size(bdev);
if (!IS_ALIGNED(offset, sector_size))
return false;
--
2.20.1
_______________________________________________
Linux-nvdimm mailing list
Linux-nvdimm@lists.01.org
https://lists.01.org/mailman/listinfo/linux-nvdimm
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org
Cc: virtio-fs@redhat.com, vgoyal@redhat.com, miklos@szeredi.hu,
stefanha@redhat.com, dgilbert@redhat.com,
Dan Williams <dan.j.williams@intel.com>
Subject: [PATCH 01/19] dax: remove block device dependencies
Date: Wed, 21 Aug 2019 13:57:02 -0400 [thread overview]
Message-ID: <20190821175720.25901-2-vgoyal@redhat.com> (raw)
In-Reply-To: <20190821175720.25901-1-vgoyal@redhat.com>
From: Stefan Hajnoczi <stefanha@redhat.com>
Although struct dax_device itself is not tied to a block device, some
DAX code assumes there is a block device. Make block devices optional
by allowing bdev to be NULL in commonly used DAX APIs.
When there is no block device:
* Skip the partition offset calculation in bdev_dax_pgoff()
* Skip the blkdev_issue_zeroout() optimization
Note that more block device assumptions remain but I haven't reach those
code paths yet.
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
drivers/dax/super.c | 3 ++-
fs/dax.c | 7 ++++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 26a654dbc69a..3cbc97f3e653 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -46,7 +46,8 @@ EXPORT_SYMBOL_GPL(dax_read_unlock);
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
pgoff_t *pgoff)
{
- phys_addr_t phys_off = (get_start_sect(bdev) + sector) * 512;
+ sector_t start_sect = bdev ? get_start_sect(bdev) : 0;
+ phys_addr_t phys_off = (start_sect + sector) * 512;
if (pgoff)
*pgoff = PHYS_PFN(phys_off);
diff --git a/fs/dax.c b/fs/dax.c
index 6bf81f931de3..a11147bbaf9e 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1046,7 +1046,12 @@ static vm_fault_t dax_load_hole(struct xa_state *xas,
static bool dax_range_is_aligned(struct block_device *bdev,
unsigned int offset, unsigned int length)
{
- unsigned short sector_size = bdev_logical_block_size(bdev);
+ unsigned short sector_size;
+
+ if (!bdev)
+ return false;
+
+ sector_size = bdev_logical_block_size(bdev);
if (!IS_ALIGNED(offset, sector_size))
return false;
--
2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Vivek Goyal <vgoyal@redhat.com>
To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-nvdimm@lists.01.org
Cc: miklos@szeredi.hu, virtio-fs@redhat.com,
Dan Williams <dan.j.williams@intel.com>,
vgoyal@redhat.com
Subject: [Virtio-fs] [PATCH 01/19] dax: remove block device dependencies
Date: Wed, 21 Aug 2019 13:57:02 -0400 [thread overview]
Message-ID: <20190821175720.25901-2-vgoyal@redhat.com> (raw)
In-Reply-To: <20190821175720.25901-1-vgoyal@redhat.com>
From: Stefan Hajnoczi <stefanha@redhat.com>
Although struct dax_device itself is not tied to a block device, some
DAX code assumes there is a block device. Make block devices optional
by allowing bdev to be NULL in commonly used DAX APIs.
When there is no block device:
* Skip the partition offset calculation in bdev_dax_pgoff()
* Skip the blkdev_issue_zeroout() optimization
Note that more block device assumptions remain but I haven't reach those
code paths yet.
Cc: Dan Williams <dan.j.williams@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
drivers/dax/super.c | 3 ++-
fs/dax.c | 7 ++++++-
2 files changed, 8 insertions(+), 2 deletions(-)
diff --git a/drivers/dax/super.c b/drivers/dax/super.c
index 26a654dbc69a..3cbc97f3e653 100644
--- a/drivers/dax/super.c
+++ b/drivers/dax/super.c
@@ -46,7 +46,8 @@ EXPORT_SYMBOL_GPL(dax_read_unlock);
int bdev_dax_pgoff(struct block_device *bdev, sector_t sector, size_t size,
pgoff_t *pgoff)
{
- phys_addr_t phys_off = (get_start_sect(bdev) + sector) * 512;
+ sector_t start_sect = bdev ? get_start_sect(bdev) : 0;
+ phys_addr_t phys_off = (start_sect + sector) * 512;
if (pgoff)
*pgoff = PHYS_PFN(phys_off);
diff --git a/fs/dax.c b/fs/dax.c
index 6bf81f931de3..a11147bbaf9e 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1046,7 +1046,12 @@ static vm_fault_t dax_load_hole(struct xa_state *xas,
static bool dax_range_is_aligned(struct block_device *bdev,
unsigned int offset, unsigned int length)
{
- unsigned short sector_size = bdev_logical_block_size(bdev);
+ unsigned short sector_size;
+
+ if (!bdev)
+ return false;
+
+ sector_size = bdev_logical_block_size(bdev);
if (!IS_ALIGNED(offset, sector_size))
return false;
--
2.20.1
next prev parent reply other threads:[~2019-08-21 17:58 UTC|newest]
Thread overview: 231+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-21 17:57 [PATCH v3 00/19][RFC] virtio-fs: Enable DAX support Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal [this message]
2019-08-21 17:57 ` [Virtio-fs] [PATCH 01/19] dax: remove block device dependencies Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-26 11:51 ` Christoph Hellwig
2019-08-26 11:51 ` [Virtio-fs] " Christoph Hellwig
2019-08-26 11:51 ` Christoph Hellwig
2019-08-27 16:38 ` Vivek Goyal
2019-08-27 16:38 ` [Virtio-fs] " Vivek Goyal
2019-08-27 16:38 ` Vivek Goyal
2019-08-28 6:58 ` Christoph Hellwig
2019-08-28 6:58 ` [Virtio-fs] " Christoph Hellwig
2019-08-28 6:58 ` Christoph Hellwig
2019-08-28 17:58 ` Vivek Goyal
2019-08-28 17:58 ` [Virtio-fs] " Vivek Goyal
2019-08-28 17:58 ` Vivek Goyal
2019-08-28 22:53 ` Dave Chinner
2019-08-28 22:53 ` [Virtio-fs] " Dave Chinner
2019-08-28 22:53 ` Dave Chinner
2019-08-29 0:04 ` Dan Williams
2019-08-29 0:04 ` [Virtio-fs] " Dan Williams
2019-08-29 0:04 ` Dan Williams
2019-08-29 9:32 ` Christoph Hellwig
2019-08-29 9:32 ` [Virtio-fs] " Christoph Hellwig
2019-08-29 9:32 ` Christoph Hellwig
2019-12-16 18:10 ` Vivek Goyal
2019-12-16 18:10 ` [Virtio-fs] " Vivek Goyal
2019-12-16 18:10 ` Vivek Goyal
2020-01-07 12:51 ` Christoph Hellwig
2020-01-07 12:51 ` [Virtio-fs] " Christoph Hellwig
2020-01-07 12:51 ` Christoph Hellwig
2020-01-07 14:22 ` Dan Williams
2020-01-07 14:22 ` [Virtio-fs] " Dan Williams
2020-01-07 14:22 ` Dan Williams
2020-01-07 17:07 ` Darrick J. Wong
2020-01-07 17:07 ` [Virtio-fs] " Darrick J. Wong
2020-01-07 17:07 ` Darrick J. Wong
2020-01-07 17:29 ` Dan Williams
2020-01-07 17:29 ` [Virtio-fs] " Dan Williams
2020-01-07 17:29 ` Dan Williams
2020-01-07 18:01 ` Vivek Goyal
2020-01-07 18:01 ` [Virtio-fs] " Vivek Goyal
2020-01-07 18:01 ` Vivek Goyal
2020-01-07 18:07 ` Dan Williams
2020-01-07 18:07 ` [Virtio-fs] " Dan Williams
2020-01-07 18:07 ` Dan Williams
2020-01-07 18:33 ` Vivek Goyal
2020-01-07 18:33 ` [Virtio-fs] " Vivek Goyal
2020-01-07 18:33 ` Vivek Goyal
2020-01-07 18:49 ` Dan Williams
2020-01-07 18:49 ` [Virtio-fs] " Dan Williams
2020-01-07 18:49 ` Dan Williams
2020-01-07 19:02 ` Darrick J. Wong
2020-01-07 19:02 ` [Virtio-fs] " Darrick J. Wong
2020-01-07 19:02 ` Darrick J. Wong
2020-01-07 19:46 ` Dan Williams
2020-01-07 19:46 ` [Virtio-fs] " Dan Williams
2020-01-07 19:46 ` Dan Williams
2020-01-07 23:38 ` Dan Williams
2020-01-07 23:38 ` [Virtio-fs] " Dan Williams
2020-01-07 23:38 ` Dan Williams
2020-01-09 11:24 ` Jan Kara
2020-01-09 11:24 ` [Virtio-fs] " Jan Kara
2020-01-09 11:24 ` Jan Kara
2020-01-09 20:03 ` Dan Williams
2020-01-09 20:03 ` [Virtio-fs] " Dan Williams
2020-01-09 20:03 ` Dan Williams
2020-01-10 12:36 ` Christoph Hellwig
2020-01-10 12:36 ` [Virtio-fs] " Christoph Hellwig
2020-01-10 12:36 ` Christoph Hellwig
2020-01-14 20:31 ` Vivek Goyal
2020-01-14 20:31 ` [Virtio-fs] " Vivek Goyal
2020-01-14 20:31 ` Vivek Goyal
2020-01-14 20:39 ` Dan Williams
2020-01-14 20:39 ` [Virtio-fs] " Dan Williams
2020-01-14 20:39 ` Dan Williams
2020-01-14 21:28 ` Vivek Goyal
2020-01-14 21:28 ` [Virtio-fs] " Vivek Goyal
2020-01-14 21:28 ` Vivek Goyal
2020-01-14 22:23 ` Dan Williams
2020-01-14 22:23 ` [Virtio-fs] " Dan Williams
2020-01-14 22:23 ` Dan Williams
2020-01-15 19:56 ` Vivek Goyal
2020-01-15 19:56 ` [Virtio-fs] " Vivek Goyal
2020-01-15 19:56 ` Vivek Goyal
2020-01-15 20:17 ` Dan Williams
2020-01-15 20:17 ` [Virtio-fs] " Dan Williams
2020-01-15 20:17 ` Dan Williams
2020-01-15 21:08 ` Jeff Moyer
2020-01-15 21:08 ` [Virtio-fs] " Jeff Moyer
2020-01-15 21:08 ` Jeff Moyer
2020-01-16 18:09 ` Dan Williams
2020-01-16 18:09 ` [Virtio-fs] " Dan Williams
2020-01-16 18:09 ` Dan Williams
2020-01-16 18:39 ` Vivek Goyal
2020-01-16 18:39 ` [Virtio-fs] " Vivek Goyal
2020-01-16 18:39 ` Vivek Goyal
2020-01-16 19:09 ` Dan Williams
2020-01-16 19:09 ` [Virtio-fs] " Dan Williams
2020-01-16 19:09 ` Dan Williams
2020-01-16 19:23 ` Vivek Goyal
2020-01-16 19:23 ` [Virtio-fs] " Vivek Goyal
2020-01-16 19:23 ` Vivek Goyal
2020-02-11 17:33 ` Vivek Goyal
2020-02-11 17:33 ` [Virtio-fs] " Vivek Goyal
2020-02-11 17:33 ` Vivek Goyal
2020-01-15 9:03 ` Jan Kara
2020-01-15 9:03 ` [Virtio-fs] " Jan Kara
2020-01-15 9:03 ` Jan Kara
2019-08-21 17:57 ` [PATCH 02/19] dax: Pass dax_dev to dax_writeback_mapping_range() Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-26 11:53 ` Christoph Hellwig
2019-08-26 11:53 ` [Virtio-fs] " Christoph Hellwig
2019-08-26 11:53 ` Christoph Hellwig
2019-08-26 20:33 ` Vivek Goyal
2019-08-26 20:33 ` [Virtio-fs] " Vivek Goyal
2019-08-26 20:33 ` Vivek Goyal
2019-08-26 20:58 ` Vivek Goyal
2019-08-26 20:58 ` [Virtio-fs] " Vivek Goyal
2019-08-26 20:58 ` Vivek Goyal
2019-08-26 21:33 ` Dan Williams
2019-08-26 21:33 ` [Virtio-fs] " Dan Williams
2019-08-26 21:33 ` Dan Williams
2019-08-28 6:58 ` Christoph Hellwig
2019-08-28 6:58 ` [Virtio-fs] " Christoph Hellwig
2019-08-28 6:58 ` Christoph Hellwig
2020-01-03 14:12 ` Vivek Goyal
2020-01-03 14:12 ` [Virtio-fs] " Vivek Goyal
2020-01-03 14:12 ` Vivek Goyal
2020-01-03 18:12 ` Dan Williams
2020-01-03 18:12 ` [Virtio-fs] " Dan Williams
2020-01-03 18:12 ` Dan Williams
2020-01-03 18:18 ` Dan Williams
2020-01-03 18:18 ` [Virtio-fs] " Dan Williams
2020-01-03 18:18 ` Dan Williams
2020-01-03 18:33 ` Vivek Goyal
2020-01-03 18:33 ` [Virtio-fs] " Vivek Goyal
2020-01-03 18:33 ` Vivek Goyal
2020-01-03 19:30 ` Dan Williams
2020-01-03 19:30 ` [Virtio-fs] " Dan Williams
2020-01-03 19:30 ` Dan Williams
2020-01-03 18:43 ` Vivek Goyal
2020-01-03 18:43 ` [Virtio-fs] " Vivek Goyal
2020-01-03 18:43 ` Vivek Goyal
2019-08-27 13:45 ` Jan Kara
2019-08-27 13:45 ` [Virtio-fs] " Jan Kara
2019-08-27 13:45 ` Jan Kara
2019-08-21 17:57 ` [PATCH 03/19] virtio: Add get_shm_region method Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 04/19] virtio: Implement get_shm_region for PCI transport Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-26 1:43 ` [Virtio-fs] " piaojun
2019-08-26 1:43 ` piaojun
2019-08-26 1:43 ` piaojun
2019-08-26 13:06 ` Vivek Goyal
2019-08-26 13:06 ` Vivek Goyal
2019-08-26 13:06 ` Vivek Goyal
2019-08-27 9:41 ` piaojun
2019-08-27 9:41 ` piaojun
2019-08-27 9:41 ` piaojun
2019-08-27 8:34 ` Cornelia Huck
2019-08-27 8:34 ` [Virtio-fs] " Cornelia Huck
2019-08-27 8:34 ` Cornelia Huck
2019-08-27 8:46 ` Cornelia Huck
2019-08-27 8:46 ` [Virtio-fs] " Cornelia Huck
2019-08-27 8:46 ` Cornelia Huck
2019-08-27 11:53 ` Vivek Goyal
2019-08-27 11:53 ` [Virtio-fs] " Vivek Goyal
2019-08-27 11:53 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 05/19] virtio: Implement get_shm_region for MMIO transport Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-27 8:39 ` Cornelia Huck
2019-08-27 8:39 ` [Virtio-fs] " Cornelia Huck
2019-08-27 8:39 ` Cornelia Huck
2019-08-27 11:54 ` Vivek Goyal
2019-08-27 11:54 ` [Virtio-fs] " Vivek Goyal
2019-08-27 11:54 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 06/19] fuse, dax: add fuse_conn->dax_dev field Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 07/19] virtio_fs, dax: Set up virtio_fs dax_device Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 08/19] fuse: Keep a list of free dax memory ranges Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 09/19] fuse: implement FUSE_INIT map_alignment field Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 10/19] fuse: Introduce setupmapping/removemapping commands Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 11/19] fuse, dax: Implement dax read/write operations Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 19:49 ` Liu Bo
2019-08-21 19:49 ` [Virtio-fs] " Liu Bo
2019-08-21 19:49 ` Liu Bo
2019-08-22 12:59 ` Vivek Goyal
2019-08-22 12:59 ` [Virtio-fs] " Vivek Goyal
2019-08-22 12:59 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 12/19] fuse, dax: add DAX mmap support Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 13/19] fuse: Define dax address space operations Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 14/19] fuse, dax: Take ->i_mmap_sem lock during dax page fault Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 15/19] fuse: Maintain a list of busy elements Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 16/19] dax: Create a range version of dax_layout_busy_page() Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 17/19] fuse: Add logic to free up a memory range Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 18/19] fuse: Release file in process context Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
2019-08-21 17:57 ` [PATCH 19/19] fuse: Take inode lock for dax inode truncation Vivek Goyal
2019-08-21 17:57 ` [Virtio-fs] " Vivek Goyal
2019-08-21 17:57 ` Vivek Goyal
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